3z-0.34 worm gear function Custom China 25 in Toluca de Lerdo Mexico High Quality and High Efficiency Low Price Three Steps Safety Ensure Acetylene Compressor with top quality

3z-0.34  worm gear function  Custom  China 25  in Toluca de Lerdo Mexico  High Quality and High Efficiency Low Price Three Steps Safety Ensure Acetylene Compressor with top quality

We – EPG Group the biggest worm gearbox, couplings and gears factory in China with 5 different branches. For more details: Mobile/whatsapp/telegram/Kakao us at: 0086~13083988828 13858117778083988828
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I. OVERVIEW
 
3Z-0.3 type 4/25 acetylene compressor is designed and manufactured according to the relevant provisions of GB5003Z-0.3 1″ acetylene station design specification “, ZBJ76571” technical conditions of dissolved acetylene equipment “and ZBJ72015” to resurrection plug acetylene compressor technical conditions “. It is fixed vertical, three-column three-stage, to the resurrection plug single action water-cooled and has a cross-head compressor. gas is inhaled from atmospheric pressure, and the exhaust pressure of 2.45 Mpa can be reached by three-stage compression. after all levels of compression, there are intercoolers and oil-water separators, which make the gas cool and separate the moisture from travel, thus ensuring that the exhaust temperature of all levels does not exceed its allowable value and can improve the efficiency of the compressor. 20 m for this compressor3h-80m /3/ h Dissolved Acetylene complete equipment for bottling.
dcT2 compressor adopts four-stage flameproof motor and acetylene-specific electrostatic triangle belt transmission, and has anti-negative pressure and ultra-high pressure alarm stop control system.
II. Key technical parameters
 
1. exhaust m 0.343/ min( Import Status)
2. exhaust pressure 2.45 Mpa( gauge pressure)
3. intake pressure 3Kpa( gauge pressure)
4. intake temperature 30ºC
5. interstage pressure
Class I exhaust pressure 0.18-0.22 Mpa
Class II exhaust pressure Mpa 0.7-0.85
6. piston stroke mm 140
7. spindle speed r/min 185
8. cylinder diameters
Level I Φ160mm
Class II Φ95mm
Grade III Φ55mm
9. motor power KW 7.5
10. Cooling water inlet temperature 25ºC
11. Water consumption <1.5 T/h
12. Compressor fuel consumption g/h 30
13. Total quality kg 2800
14. Dimensions (length × width × height) 1360×910×1520
15. Transmission mode
Motor — Electrostatic Belt — Compressor
(1) Type of motor YB160L-8 KW 7.5  dcT2
(2) Spindle steering From the big wheel, clockwise
III. Brief description of the structure and function of the main components
 
1. seats:
The seat consists of a fuselage and a crankcase. separated horizontally along the crank neck line and positioned with a conical pin.
Crankshaft lining consists of two parts, installed on the crankcase, with pasteurized alloy. The upper bearing cover is pressed on the bearing, and the gap between the main shaft neck and the shaft lining can be adjusted by using the gasket.
The two ends of the crankshaft are supported on the cover of the seat, and pasteurized alloy is also poured inside.
The crankcase is preceded by a level gauge to observe the amount of oil stored in the tank. There is a spherical valve at the back to remove the lubricating oil.
There are loading and unloading holes before and after the fuselage, so as to load and unload crosshead, connecting rod, tighten connecting rod screw and crosshead screw, adjust connecting rod bearing clearance, the loading and unloading hole has cover plate cover strictly.
The front of the fuselage is equipped with an oil pressure gauge.
the crankcase is fixed on the base with 4 foot screws.
2. crankshaft:
Crankshaft three crank journal according to 120° equal, four spindle neck as the supporting point, and fixed the crankshaft longitudinal movement. The flywheel is mounted on the right end of the crankshaft to transfer power.
Crankshaft main bearings and crank bearings are lubricated with oil.
The rotor oil pump is installed at the left end of the crankcase, positioned by the worm gear box of the lubrication system, and the movement of the crankshaft is transmitted to the oil pump shaft through its worm shaft.
3. link:
The connecting rod consists of connecting rod body and connecting rod cover.
The large end of the connecting rod is equipped with a two-half-pair bearing made of tin bronze, and a gasket is placed at the opposite end of the bearing to adjust the gap between the shaft lining and the crank journal, and together, the connecting rod screw and the compression nut are fixed on the connecting rod body.
The small end of the connecting rod is pressed into the bronze shaft lining, the shaft lining has an oil tank, the lubricating oil flows into the oil tank through the oil hole in the cross head pin, and the lubricating shaft lining and the cross head pin.
4. crosshead:
Cross-head system made of ductile iron.
Cross-head pin and cross-head system straight handle tight fit, and ring with retaining cable to prevent jumping.
The crosshead is wedged with the piston rod.
The lubrication system of the cross head body and the guide rail of the fuselage is supplied with lubricating oil by the rotor oil pump through the oil hole on the fuselage.
There are oil holes inside the crosshead pin. The lubricating oil lubricates the small end of the connecting rod through the crosshead body and the oil hole passage inside the crosshead pin.
5. pistons:
The piston is composed of piston rod, piston body and other parts. The piston body is made of cast iron.
The first, second and third stage piston body cooperate with the piston rod, the piston is fixed on the piston rod with a compression nut, and there are anti-loosening washers between the piston body and the nut to prevent loosening.
The lower end of the piston rod is connected with the cross with a wedge.
6. cylinders:
All levels of cylinder are composed of cylinder block and cylinder head. The cylinder block and the cylinder block are fixed on the middle seat by bolts, and the cooling water is around the cylinder block and the cylinder head are cooled.
The first, second and third stage cylinders are made of ductile iron.
The first, second and third stage cylinder heads are made of ductile iron, and one inlet and outlet valve is arranged inside, which is pressed by valve gland, screw or valve card.
7. sealed:
The sealing letter is divided into upper and lower sealing letters, which are respectively mounted on the cylinder and fuselage, and the upper body is equipped with cylinder, cooling pipe and water tank.
The function of the upper sealing letter is to prevent the acetylene gas from lea ept out from the lower part of the cylinder, and there is a tetrafluorine sealing ring inside, which is compacted with a spring and nut, so that the sealing ring is properly pressed against the piston rod.
The function of the lower seal letter is two, one is to prevent oil from entering the cylinder; the other is to prevent the cylinder condensate from flowing into the crankcase, the shape of which is like a bell cover, with square holes on both sides, and cover with a loose-leaf plate to prevent dirt from soaking.
Condensate water and trace oil from piston rod can be released through oil and water pipe on both sides of fuselage.
The upper part of the fuselage is a gas storage box, which collects the acetylene gas from each cylinder.
8. valve:
The first and second stage inlet and outlet air valve is a ring valve. It is composed of stainless steel valve seat, height limiter, stainless steel valve plate, spring and nut. The nut is fixed with an opening pin to prevent accidents caused by loosening into the cylinder. The spring is a rectangular section made of stainless steel wire.
The joint of valve and cylinder head is covered with annealed aluminum gasket.
9. Safety
A spring type safety valve is installed on the cylinder head or exhaust pipe to connect to the outlet channels at all levels.
The safety valve center bar is pressed on the safety seat by spring. The opening pressure of the safety valve can be adjusted by the nut on the center bar.
10. Water tanks and coolers:
The cooling water tank is made of iron plate and angle steel welded. fixed to the fuselage with screws, with rubber gasket at the joint to prevent leakage.
All pressure gauge valves and pressure gauges are fixed in front of the water tank, with overflow outlet and oil-water separator behind.
The coolers are all made of seamless steel pipe, the serpentine pipe of the first stage cooler is arranged along the inner wall of the water tank, and the first stage cooler is connected with the first stage cylinder head by another pipe.
The second and third stage coolers are serpentine tubes. The flow and flow are counter-current around the corresponding cylinder.
After the third-stage compressed acetylene gas is cooled, the water in the acetylene gas is sent to a high-pressure dryer through the oil-water separator.
 11. Rotor pumps:
Rotor oil pump is composed of pump body, rotor, pump cover, rotor shaft, etc.
The rotor oil pump is equipped with a pressure regulating valve, which can adjust the oil pressure. The coupling method of oil pump shaft and crankshaft is driven by worm shaft.
12. Cylinder lubrication system
The cylinder lubrication system is composed of medium pressure oil injector, worm gear box, connecting disc, worm shaft and worm gear. The worm gear box is fixed on the fuselage by connecting disc, one end of the worm shaft is connected with the crankshaft, the other end is connected with the gear shaft of the oil pump, thus driving the oil pump to run to lubricate the connecting rod, cross head and other power parts. The movement of worm and worm gear is driven by the worm gear shaft to lubricate the cylinders at all levels. The medium-pressure oil injector has the overrunning clutch, may shake the oil injector to lubricate all levels of cylinder in ept before the machine moves.
 
 
 
 
 
 
 
 
IV. Installation of compressors
 
(i) Basis
The construction of compressor foundation shall be carried out according to the engineering design drawings of the factory building, and shall be poured continuously. For the first irrigation, leave 30 mm thick surface thickness. and find the level between the four parts of each foot hole of the compressor and the center line part of the bottom of the flywheel side fuselage. after the foundation is dry and fixed, wipe and dispose 10 mm thick pad iron at the bottom of the fuselage. the remaining four parts place the pad iron group with a total thickness of about 30 mm each, and make the upper surface of the four groups of pad iron about the same horizontal plane.
(ii) Installation
1. the machine is shipped in the oil seal state, before installation, the valve, cylinder head, piston, connecting rod, sealing letter filler should be disassembled. Wash the antirust grease and reassemble as required by the drawings and related documents.
2. the whole machine is hoisted on the basis, the level should be measured at the top surface of the cylinder to remove the cylinder head, the horizontal and vertical level should not exceed 1000∶0.5, then pour the ground foot hole, after the concrete in the ground foot hole is dry, the fine calibration level should not exceed 1000∶0.5, at the same time tighten the anchor bolt, finally wipe the surface with cement mortar and plug the bottom of the fuselage.
3. clearance of each part shall conform to the requirements of technical documents such as drawings and this specification, and may be checked by stopper or lead pressing method.
4. install and adjust the power device. Before the belt is installed, the motor shall be idled separately for 2-3 hours and the steering shall be corrected.
 
 
 
 
 
V. Use and maintenance of compressors
 
(i) Preparation before operation
1. into the fuselage crankcase, add N68 oil in summer ,(original 40#Add N46 oil in winter (original 30)#Oil). oil surface to 2/3 of the height of the oil mark window.
2. add HS-13 oil to the oil injector and oil surface to the oil level.
3. fill the gear pump, oil suction pipe and oil filter with the same mechanical oil as in the crankcase to ensure that the moving mechanism can be lubricated immediately when the compressor starts, and add a proper amount of lubricating oil to the lubricating surface of the moving.
4. the oil injector is rotated with a manual device, the compressor oil is first injected into each cylinder to ensure that the cylinder can be lubricated at the beginning of the start. In order to check whether the compressor oil enters the cylinder, the needle valve at the oil pipe joint on the cylinder can be unscrewed to have the oil dripping out, this work needs to be carried out before each start.
5. check the connection nuts, not loose.
6. check the inlet and drain valves, the flow must be clear.
(2) Operation of empty vehicles
1. remove all the valve, with the number of hand-pans car rotation must not have abnormal sound and jam phenomenon.
2. the pressure selection switch on the control cabinet is rotated to the starting position for a point test, that is, stop immediately after starting, there should be no abnormal sound and other abnormal phenomena.
3. determine no problem, start the motor running for 3 minutes, pay attention to the oil pump pressure must not be lower than (1 Kg/cm2)0.098Mpa, and adjust the amount of oil at each injection point, at the same time, each moving parts must not be abnormal, otherwise should immediately stop to check and remove it.
Remove the fuselage baffle immediately after stopping 4. running for 3 minutes, check the surface temperature of each bearing sleeve, cross head slide, piston rod and pac ept must not exceed 65ºC.
5. check the joints must not be loose phenomenon, at the same time to fasten the nuts of anchor bolts.
6.10 minutes ,30 minutes ,1 hour ,4-8 small space-time operation. After each operation must be checked according to the above requirements, no problem before the next operation.
7. installed on the first-stage intake and exhaust valve no-load operation, that is, the first-stage cooling pipe to blow off, the time is generally not less than 30 minutes, at this time in the first-stage cooling pipe vent (that is, the second-stage cylinder inlet chamber) with white paper inspection, in the discharge gas should be free of rust dust and other dirt, otherwise should extend the blowing time.
8. blow off the secondary and tertiary coolers in turn with the same method.
After 9. blow off, remove all levels of valve for inspection, its sealing surface must not be damaged, otherwise to replace the new parts, and then installed in turn.
10. Replace lubricating oil in crankcase and prepare load test run.
(3) Load test run
1. Air Test
(1) After the empty vehicle is running normally, adjust the three-stage exhaust valve to 0.8 Mpa, for 30 minutes. Notice if there is abnormal sound, abnormal heat and abnormal vibration and other phenomena, if there should stop to remove.
(2) After confirming that the operation of 0.8 Mpa is no problem, the voltage can be adjusted by 1.8 Mpa, for 1 hour.
Make sure that the 1.8 Mpa is running without problems, adjust the pressure to 2.5 Mpa, for 1 hour, and check the joints and flanges with soapy water. At this time, the power of the machine is slightly higher than the calibration power at pressure acetylene (large 0.1 kW), and the exhaust temperature at all levels is about 41ºC higher than that at pressure acetylene.
(4) Stop and check that the temperature of each abrasive surface shall not exceed 65ºC and the oil temperature shall not exceed 60ºC.
(5) Run continuously for 3-6 hours under 2.4 Mpa pressure. If there is no abnormality, then check the temperature of each part according to the preceding paragraph.
2. nitrogen test
(1) Switch the intake pipe to nitrogen with oxygen content less than 3%. (Nitrogen can be replaced by CO2 or other inert gas, the same below)
(2) Connect the negative pressure control device and the over-pressure control device so that when the suction pressure of the compressor is lower than the given value, it can not start up or stop the running compressor. If the exhaust pressure is greater than 2.45 Mpa, it can also stop automatically.
(3) The compressed acetylene can be switched by blowing the pipeline with nitrogen after lowering the pressure so that the discharge of nitrogen measured before the filling table reaches 97%.
3. acetylene test
(1) The purity of acetylene imported from the compressor is greater than 99%, and the test paper impregnated with 5% silver nitrate is used for coloring test. No coloring is required to control the content of harmful gases hydrogen sulfide and phosphine.
(2) Start the compressor and replace the nitrogen with acetylene gas until the purity of acetylene obtained from the exhaust sampling port in front of the filling table reaches 98.5%.
(3) Records shall be made during operation and all technical parameters shall meet the specification requirements when the pressure rises to the rated value.
(4) After a period of operation (filling the bottle once), stop and recycle the acetylene gas from the high pressure line into the gas storage tank. Then the compressor inlet is filled with nitrogen with purity of more than 97% until the acetylene content is less than 1.5% measured by the exhaust port sampling, and the shutdown.
(5) Remove all levels of valve, check all levels of cylinder head inside surface and all levels of valve inside side should be free of carbon black. All main friction surfaces, such as connecting rod size head tile, cross head slide should be free of obvious wear and hair.
(4) The starting of the compressor shall follow the following steps:
After 1. short stop, the following steps should be followed:
(1) Open the intake valve and ensure the flow is smooth.
(2) Hand-operated oil injector to lubricate all cylinders.
(3) Turn the pressure selector switch to the starting position. (The negative pressure control device and the over pressure control device should be on)
(4) Start the compressor and turn the pressure selector switch back to the normal operating position after it is running smoothly.
(5) The bypass valve leading to the gas storage tank after closing the machine and connecting the filling table.
2. short-term parking
(1) Put the acetylene gas with pressure behind the machine back into the tank and maintain the same positive pressure as the tank.
(2) Cut off the power and stop running.
(3) Close the intake valve when the cylinder temperature drops below 50ºC.
3. long-term parking
(1) If the positive pressure of the system can not be maintained due to maintenance of the equipment or other reasons, or if the system is stopped for more than two days, before stopping, switch to nitrogen for blowing until the acetylene content at the outlet of the emptying pipe is reduced to less than 2.5% and the final nitrogen used is closed in the system.
(2) When stopping for more than two months, in addition to purging according to the preceding paragraph, the valve shall be opened after purging and the cylinder mirror surface shall be oil sealed.
4. driving after long-term par ept shall refer to the aforementioned “load test” provisions.
(v) Use and maintenance
1. before using the compressor, the operator should first learn the relevant knowledge about acetylene and dissolved acetylene equipment ,20 M3/h-80M3/h the process of dissolved acetylene complete equipment and the structure of this compressor, safety knowledge of high pressure acetylene and this specification before participating in the operation.
2. machine in normal operation, should always pay attention to observe and listen to the operation of the machine, and every hour to record the technical data and work situation.
3. defects should be repaired in time, if necessary stop to repair, if allowed to exist in operation defects, will inevitably increase the chance of accidents and make later repair more difficult.
4. the compressor start operation accumulative total 400 hours after replacing the crankcase lubricating oil, after regular inspection of the quality of lubricating oil, found that the oil quality mixed with impurities, should be replaced. When the lubricating oil is not good quickly, the quality of each friction surface should be checked.
The temperature of each friction surface of the 5. shall not exceed 65ºC, and the oil temperature shall not exceed 60ºC.
6. often keep the machine appearance and surrounding environment clean, especially near the friction surface, more need to prevent the entry of foreign bodies.
 
VI. Malfunctions and elimination methods in work

Order
No.
Fault phenomena Possible causes Solutions
1 Pressure of lubricating oil suddenly decreased (1) Loss of oil pump Repair pump shaft, gear and other parts
(2) blocked or broken pipeline Dredge or replace tubing
(3) Oil pressure gauge failure Check for replacement of new oil pressure gauges
2 Oil pump pressure not enough or not (1) Oil suction pipe or oil pump cover plate is not tight Check tubing joints and pump cap gaskets and fasten them
(2) Too little oil in the tank Increase in oil
(3) Excessive gear wear Repairing oil pump gear
(4) Oil filter or tubing clogging Cleaning oil filters or tubing
(5) Oil pressure regulator adjusted too low Adjustment
(6) The quality of lubricating oil is not in conformity with the regulations and the viscosity is too small Replacement of new lubricants
3 Excessive oil temperature, bearing and other friction components overheat (1) Poor oil quality increases mechanical wear Replace new oil and clean tank
(2) Inadequate supply of fuel Inspection and processing by serial number 2
(3) The assembly clearance of moving parts is too small or the position deviation is too large Corresponding trimming
4 Bad oil supply in oil injector (1) Excessive wear and tear on the plunger and pump body and return of pressure oil Inspection repairs
(2) Oil leakage or blockage in the tubing
5 Check valve of oil injection joint on cylinder is hot and poor oil supply Not tight Grinding repair or replacement of new items
6 Higher intake temperature (1) Countercurrent caused by poor suction valve Repair and replacement of air valve parts
(2) Heating of first class suction pipe Removal of heat sources near primary suction pipes
7 High exhaust pressure Air leakage or damage to secondary intake and exhaust Overhaul secondary valve

Serial number Fault phenomena Possible causes Solutions
8 High secondary exhaust pressure Air leakage or damage to third stage intake and exhaust valve Overhaul of tertiary valves
9 Lower exhaust pressure Air leakage or damage to primary intake and exhaust valves Overhaul primary valve
10 Lower secondary exhaust pressure Air leakage and damage to secondary intake and exhaust valve Overhaul secondary valve
11 Insufficient exhaust (1) The first stage intake valve spring is strong and the resistance is large Replace suitable springs
(2) Air leakage or damage to primary intake and exhaust valves Overhaul primary valve
(3) Serious leakage of piston rings at all levels Repair of piston rings and cylinder boundary surfaces
(4) High intake temperature Resolved by serial number 6
12 Excessive exhaust temperature (1) Excessive intake temperature in the previous stage Analyze and eliminate the factors of high inlet temperature in front stage
(2) Inadequate supply of cooling water Analysis of the causes of water supply
(3) Excessive scale affects cooling Remove dirt and dirt
(4) High exhaust pressure and low intake pressure Resolved by serial number 7-10
13 Carbon black from acetylene decomposition and explosion found in the cylinder (1) The poor quality of cylinder lubricating oil and insufficient oil supply aggravate the friction of cylinder mirror surface Solve oil supply problem
(2) The entry of foreign matter into the cylinder produces bumping or local hair pulling Removal of foreign bodies
(3) Other Reference Appendices to this specification, High Pressure Acetylene Safety Technology  
14 Safety valve failure (1) The spring can not be opened at the right time if it is too elastic Check calibration
(2) If the spring is too small or the spring is lost or the cover is not tightly closed, the valve will leak or open in advance Adjust or replace springs, blow clean dirt, grind cover or replace parts
15 Abnormal noise in the fuselage (1) Main bearing damage Replacement of bearings
(2) Excessive wear clearance between the large head bush and the small head bush of the connecting rod Adjust clearance or replace parts or use plating to coarser shaft diameter
(3) Loose connecting rod nut or piston rod loc ept nut Re-locking
(4) Loose crankshaft and flywheel Tightening or plating rough diameter repair
16 Abnormal noise in the cylinder (1) Death gap is too small Adjust to drawing requirements
(2) The piston ring extends beyond the cylinder mirror Adjust piston axial position
(3) Loose nut on piston Tighten and lock
(4) In-cylinder foreign bodies or broken piston rings Remove foreign objects and replace new rings
17 Abnormal sound or air leakage of intake and exhaust valves (1) Loosening of the entire valve installation or loosening of the valve block and seat Tighten and lock
(2) The insufficient spring force causes the valve piece to be unable to reset in time, causes the impact force to increase Adjust replacement spring
(3) The spring damages the jammed valve sheet to make it loosely closed and damages the sealing surface Replacement of springs and re-grinding of covers
(4) Over-lube oil valve plate co ept effect switch Cleaning valve plate for regulating oil intake
(5) Excessive warping of the disc and distortion of the seat Grinding or replacement of parts
(6) Unclean intake Analyze causes, clean up
18 Abnormal noise or heating of motor (1) Overload Analyze the cause and resolve the maintenance
(2) Rotary partial purge

 
VII. Overhaul of compressors
In order to ensure the normal operation of the complete set of acetylene equipment and avoid stopping halfway, in addition to the need to pay attention to the compressor situation at any time, but also need:
After 1. work 400 hours, check
(1) What is the tightness of the cutting pieces and cutting seats of the valves at all levels, and shall be cleaned or ground if necessary.
(2) Whether the safety valve at all levels is sensitive and whether the spring is retracted.
(3) Whether the sealing joints are leaking.
(4) Whether the nuts are tightened and locked.
2.2000 hours, check
(1) Inspection after 400 hours.
(2) Wear of piston rings and sealing fillers.
(3) Check assembly gaps in each department and replace new parts if necessary.
(4) Clean the oil tank, oil pump, oil pipe, oil filter and replace the new oil.
(5) Clean the oil injector system and check the tightness of the check valves.
3. after 5000 hours of work (but not less than once a year)
(1) Examination after 2000 hours.
(2) If there are any scratches on the mirror surface of the cylinder, it should be polished and smooth to prevent the scratches from continuing to expand.
(3) Remove the crankshaft and bearings and check their accuracy and finish, and decide to repair or replace them according to the actual situation.
(4) Cleaning of exhaust pipes and coolers and water pressure tests.
(5) Check the clearance finish between the crosshead and the fuselage slide and decide to repair and replace it according to the actual situation.
(6) According to the water quality of the cooling water, the treatment of the water cavity is decided. If the water quality is hard, the water chamber should be washed at this time, that is, soak the water chamber with 14% caustic sodium aqueous solution (specific gravity 1.16) for 6-8 hours, then release the water, and then clean with clean water. If the water quality is soft, the work may be postponed as appropriate.
After mastering the performance and wor ept rules of this machine, the above maintenance period can be adjusted appropriately.
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Appendix: High Pressure Acetylene Safety Technology
 
I. Main properties of acetylene:
(i) Main physical properties:
1. Structure: H-C=C-H
2. molecular weight :26.04
density 3. standard state :1.161 kg/m3,0.906 times the air.
4. critical values :(1) temperature :36.3ºC;(2) pressure :61.6 atmospheric pressure.
5. explosion limit :2.5-100% of air volume.
6. solubility: at 15ºC under atmospheric pressure, the dissolution ratio (volume) of water to acetylene is about 1.1∶.
Dissolution ratio (volume) of acetone to acetylene is about 1∶25.
(ii) Main chemical properties:
Acetylene is a three-bonded unsaturated hydrocarbon that can react easily.
1. contact with hydrogen reduced to ethylene and ethane.
After mixing 2. with oxidizing gases such as oxygen (including air) chlorine gas, oxidation explosion can occur in a large range and heat is emitted. Ignition temperature varies between 300 and 470ºC depending on the concentration. The maximum pressure can be increased by 10.5 times after mixing with air.
3. react with metal copper, silver and its salts to produce explosive acetylene copper and acetylene silver, which can explode at 150ºC.
4. acetylene starts polymerization at 200-300ºC, the polymerization process is exothermic heating process. Because acetylene decomposes at a certain temperature pressure and ignition energy to form carbon black and hydrogen, and releases energy, so that the temperature pressure of gas continues to rise, so acetylene can decompose and explode. When the explosion is broken down, the pressure can be increased to 9-13 times.
(iii) Harmful to the human body:
1. pure acetylene is a colorless, non-toxic, slightly sweet gas. However, when the concentration is high, it will be harmful because of the lack of oxygen in the inspiratory, when there is more than 20% acetylene in the inspiratory, breathing is difficult and causes mild headache; when the concentration is more than 40%, it will cause collapse and have the risk of asphyxia.
2. acetylene contains impurities, such as general industrial acetylene contains toxic, odorous hydrogen sulfide or phosphine, etc., will accelerate poisoning, causing symptoms change.
II. Explosive nature of acetylene
Although acetylene can occur the above three forms of explosion, it is quite dangerous, but the occurrence of explosion requires certain conditions (ignition temperature under certain wor ept conditions, ignition energy, concentration limit) in the general design conditions, there is a certain distance from this explosion condition. So as long as these conditions are strictly controlled, the explosion will not occur, and the combustion can be stopped.
(1) Because acetylene silver and acetylene copper are sensitive to explosion, pipes and equipment accessories that have long been in contact with acetylene are not allowed to be made of copper and copper alloys containing more than 70% copper, and silver welding is not allowed. When the copper content is below 65-70%, the surface of the copper parts will produce acetylene copper. is also a very thin film fixed to the metal surface and does not spark by impact or heating.
(ii) Oxidation explosions:
1. is a safety meter, the explosion limit should be strictly controlled, and the lower limit of explosion is 2.5%(volume) at 25ºC under atmospheric pressure. When the temperature rises, the lower limit decreases slightly, and the lower limit of explosion at t° C Lt can be calculated as follows:
Lt={1-0.000721(t-25)}×2.5%
2. control sources of ignition: the types of ignition sources can be divided into: mechanical (strike, friction, adiabatic compression, shock wave); thermal (flame, high temperature gas, thermal emission, contact surface heat conduction); electrical (electric spark, arc, corona, electrostatic); optical (various light); chemical (contact coal and decomposition oxidation, polymerization and acetylene copper explosion, etc.). Sources of fire and causes should be taken into account. For example: acetylene station can not have open fire; as far as possible do not use the impact of spark-prone iron tools, must be used with great care; not easy to produce static electricity, such as synthetic fiber clothing and so on.
(1) The minimum energy required for the ignition of a mixture of acetylene and air is called pyrophoric energy. Acetylene can be completely burned when the air contains 7.73%(volume) of acetylene, so that the pyrophoric energy required is minimal and the pyrophoric energy increases when other components are present. For example, when the composition of acetylene exceeds 3 to 40%(volume), friction and impact can not cause ignition.
(2) The temperature of ignition referred to in the chemical properties of acetylene is the temperature at which the mixture of acetylene and air fires spontaneously. but when the high temperature solid surface is used as the heating source (such as high temperature pipe, cigarette fire, etc.), because of the large heat loss, the ignition temperature should be increased to more than 500ºC. If the air is heated, it will take more than 700ºC.
(iii) Breakdown explosions
1. decomposition of the explosion of the source of the same oxidation explosion.
2. minimum ignition energy of the decomposition explosion decreases with the increase of pressure. Mpa 0.98 was 2.9×10-3 joules under pressure ;1.47 was 0.56×10-3 joules under pressure; and 2.45 was approximately 0.2×10-3 joules under pressure. as a result, high pressure acetylene is more sensitive to decomposition explosion. generally speaking, acetylene below 0.137 Mpa( absolute pressure) does not undergo decomposition explosion, but when there is a great ignition energy, decomposition explosion can also occur. At high pressure, even rough opening of the valve caused by the friction heat may cause decomposition explosion, so the operation of high pressure acetylene valve should be smooth and careful.
3. the time required for the decomposition explosion to begin to reach the highest pressure decreases with the increase of pressure, and the ratio of the highest pressure to the initial pressure also increases roughly with the increase of pressure, so the decomposition explosion of high pressure acetylene is more violent.
(4)” deflagration “of acetylene
No matter oxidation explosion, or decomposition explosion, can cause “deflagration “. The so-called deflagration refers to the phenomenon that the composition of acetylene air mixture explodes at 4.2-50% or when the decomposition explosion of acetylene is carried out at a certain distance, the explosion propagates rapidly beyond the speed of sound, and produces a huge shock wave and tens or even hundreds of times the explosion pressure, which has great destructive power. The following is only about acetylene in the pipeline decomposition explosion and caused by deflagration to be introduced:
1. the long tube, the smaller the pipe diameter, the higher the critical pressure of the decomposition explosion and the critical pressure resulting in deflagration. for example, in a 1 inch tube diameter, the pressure does not exceed 0.22 Mpa( absolute pressure) does not propagate the decomposition explosion, does not exceed 0.31 Mpa( absolute pressure), then does not form deflagration, therefore, it is safer to use the thin tube as far as possible.
2. decomposition of the explosion spread a certain distance before it becomes deflagration, we call this distance induced distance. The larger the diameter, the larger the initial pressure, the smaller the induced distance, that is, it is easier to form deflagration. By the way, because of the induced distance, the place where deflagration occurs, that is, the most destructive place, is not necessarily the initial point of decomposition explosion, but often in the pipeline decomposition explosion. And to the end of the tube equipment to produce deflagration, which in the analysis of accidents should be noted.
(v) A stop device for the propagation of an explosion — a fire arrester. The fire resistance mechanism is that when the explosion flame passes through the filler and metal mesh, the heat on the flame surface is absorbed quickly to achieve the purpose of extinguishing the fire. Therefore, the fire arrester should be inspected regularly and its pac ept specifications should be appropriate.
(6) Acetylene stations shall be designed and constructed in accordance with GB50031 Code for the Design of Acetylene Station.
III. Measures for the occurrence of abnormal conditions and states of emergency
The acetylene factory should pay attention to the safety knowledge education of the staff and workers at ordinary times, including the operation and maintenance of the equipment, the judgment and elimination of accidents, and the education of the labor attitude factory rules and regulations, so as to ensure the normal production.
1. anomalies
When the equipment is found abnormal or malfunction, contact the person in charge of duty immediately, and take measures according to the specific situation to prevent the accident.
Abnormal state and method of measures

Serial number Causes of phenomena and judgments Measures
1 Low pressure equipment leak gas ignition 1. use of powder fire extinguishers, CO2Fire extinguisher, hydrogen fire extinguisher. (No carbon tetrachloride fire extinguishers)
2. the fire outside the generator, after the fire to irrigate cooling.
3. stop compressor operation.
After 4. the fire, check the heating burn place to find out the cause.
2 Jet generated by high pressure equipment (pipe rupture, gasket damage, safety valve action, etc.) 1. close all necessary valves related to the ejection system.
2. stop compressor operation.
3. close the valve that can be ejected.
4. remove static electricity and other ignition sources from the ejection area by irrigation.
3 Gas fires Fire extinguishing 1. with fire extinguishers, irrigation and cooling.
2. the backup pump for starting sprinkler.
3. to the adjacent equipment, containers and other large amount of irrigation cooling.
4 Produced from filled acetylene cylinders or stationary containers 1. the sprinkler and concentrate the sprinkler near the jet.
2. stop compressor operation.
3. close the valve concerned to stop the jet.
4. removable container for relief valve action to move outside.
5 Fire nearby 1. inform the fire department urgently.
2. observe the wind direction, scale, fire, etc. of the fire, stop the compressor as appropriate, prepare the work of all kinds of fire fighting equipment, and start the sprinkler.
3. according to the need, the equipment, container placement site and so on can be sprinkled to start cooling.
4. help eliminate nearby fires and control its manyan.

2. emergency measures
In the discovery of a nearby fire or a state of emergency, loudly call to come, do not have to wait for the order of the person on duty, immediately take emergency measures such as shutdown, and then quickly inform the person on duty, and ask for action.
Those who take urgent measures should be calm and calm, correctly grasp the surrounding situation and development trends, pay full attention to gas leakage, fire, gas explosion, vessel rupture and other hazards, take safe action on the basis of correct judgment, and make primary efforts to prevent personal accidents.
State of emergency and its measures

Serial number Causes of phenomena and judgments Measures
1 Low pressure equipment leak gas ignition 1. use of powder fire extinguishers, CO2Fire extinguisher, hydrogen fire extinguisher. (No carbon tetrachloride fire extinguishers)
2. the fire outside the generator, after the fire to irrigate cooling.
3. stop compressor operation.
After 4. the fire, check the heating burn place to find out the cause.
2 Jet generated by high pressure equipment (pipe rupture, gasket damage, safety valve action, etc.) 1. close all necessary valves related to the ejection system.
2. stop compressor operation.
3. close the valve that can be ejected.
4. remove static electricity and other ignition sources from the ejection area by irrigation.
3 Gas fires Fire extinguishing 1. with fire extinguishers, irrigation and cooling.
2. the backup pump for starting sprinkler.
3. to the adjacent equipment, containers and other large amount of irrigation cooling.
4 Produced from filled acetylene cylinders or stationary containers 1. the sprinkler and concentrate the sprinkler near the jet.
2. stop compressor operation.
3. close the valve concerned to stop the jet.
4. removable container for relief valve action to move outside.
5 Fire nearby 1. inform the fire department urgently.
2. observe the wind direction, scale, fire, etc. of the fire, stop the compressor as appropriate, prepare the work of all kinds of fire fighting equipment, and start the sprinkler.
3. according to the need, the equipment, container placement site and so on can be sprinkled to start cooling.
4. help eliminate nearby fires and control its manyan.

 
3. emergency measures
In any emergency measures too late to implement, call people in vain, and endanger the dangerous state of the person, should quickly retreat, while playing retreat gesture to tell others, in order to minimize personal casualties.
 

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3z-0.34  worm gear function  Custom  China 25  in Toluca de Lerdo Mexico  High Quality and High Efficiency Low Price Three Steps Safety Ensure Acetylene Compressor with top quality

3z-0.34  worm gear function  Custom  China 25  in Toluca de Lerdo Mexico  High Quality and High Efficiency Low Price Three Steps Safety Ensure Acetylene Compressor with top quality