[Natural Gas Compressor]Working Principle of Natural Gas Compressor Maintenance and Maintenance of Natural Gas Compressor
Working Principle of Natural Gas Compressor
When the compressor is running, the motor drives the crankshaft to rotate, and the piston reciprocates through the connecting rod. When the crankshaft rotates once, the piston reciprocates once, and the process of suction, compression and exhaust is successively realized in the cylinder, that is, a working cycle is completed.
(1) Inhalation process When the piston moves to the left, the working volume in the cylinder gradually increases and the pressure gradually decreases. When the pressure drops slightly lower than the pressure in the intake pipe, the gas in the intake pipe will open the intake valve and enter the cylinder until the piston reaches the leftmost position (also known as the inner dead center), the working volume is the largest, and the intake valve starts closure.
(2) Compression process When the piston moves to the right, the working volume in the cylinder shrinks, and the gas pressure gradually increases. Due to the non-reverse effect of the intake valve, the gas in the cylinder cannot flow back into the intake pipe. At the same time, because the gas pressure in the exhaust pipe is higher than the pressure inside the cylinder, the gas in the cylinder cannot flow out from the exhaust valve, and the gas in the exhaust pipe cannot enter the cylinder due to the non-reverse effect of the exhaust valve. . At this time, the amount of gas in the cylinder remains constant, and as the piston moves to the right, the gas pressure continues to rise.
(3) Exhaust process When the piston moves to the right to a certain position, the gas pressure in the cylinder rises to slightly higher than the gas pressure in the exhaust pipe, and the gas will open the exhaust valve and enter the exhaust in the tube until the piston moves to the rightmost position (also known as the outer dead center). The exhaust valve closes, the piston moves to the left again, and the above process repeats.
The difference between natural gas compressors and ordinary compressors
The natural gas compressors are different from ordinary compressors. The natural gas compressors mainly compress natural gas (including the content, methane, propane, etc.), the pressure is relatively high and the danger level is high. Ordinary compressors mainly compress air, the medium is very simple, and the pressure is also very small.
The components of CNG and pipeline natural gas are the same, and the main component is methane (CH4). CNG can be used as vehicle fuel. LNG (Liquefied Natural Gas) can be used to make CNG, and this CNG-fueled vehicle is called NGV (Natural Gas Vehicle). Liquefied Petroleum Gas (LPG) is often confused with LNG, but they are actually quite different. The main component of LPG is propane (more than 95%), with a small amount of butane. LPG is stored in a liquid state in storage tank containers under appropriate pressure and is used as civil fuel and vehicle fuel.
Maintenance and maintenance of natural gas compressors
In order to reduce the damage of compressor parts and prolong the service life of compressors, daily maintenance and maintenance are extremely important. critical and necessary. The daily maintenance work mainly includes: regular lubrication and oil change of the equipment, anti-corrosion work of the equipment, regular calibration of the accuracy of the equipment, etc., so as to minimize the wear and failure of parts and make the equipment as normal as possible. . The specific maintenance process is generally divided into quarterly maintenance, semi-annual maintenance and annual maintenance according to the time.
1 Quarterly Maintenance
(1) The system should be vented for cleaning and inspection every quarter, the purpose is to observe the sensitivity of the solenoid valve action, and the more the venting system is cleaned. Clean, the action of the solenoid valve is more sensitive.
(2) Clean the copper-based sintered filter before the solenoid valve to make it as clean and free of dirt as possible.
(3) For the filter element of the filter, consider whether to replace it according to the specific usage and environmental factors.
(4) Air valves at all levels should also be thoroughly and carefully cleaned to remove carbon deposits as much as possible.
(5) Clean the outside of the air compressor to ensure it is clean and free of dirt; replace the compressor oil according to specific conditions.
(6) After the cleaning work is completed, the movement structure of the compressor should be calibrated and checked. For example, check the tightness of the V-belt, the lubrication condition of the main motor, and adjust the gap between the various components to ensure the flexibility of its working process.
(7) Pay attention to the comprehensive sewage discharge of the separator, exhaust gas collection pipe, filter, recovery tank, etc.
2 semi-annual maintenance
(1) Check whether the pressure gauge is qualified and whether the action value of the pressure controller is within the specified range.
(2) Check whether each motion mechanism of the compressor is in normal operation and whether the action value is flexible.
(3) Check the performance of the safety valve of the gas storage tank to ensure that it is opened in time within the safe use range at the highest pressure.
(4) Carefully clean the outside of the compressor and the inner cavity of the air storage tank, check whether the oil compressor and suction filter are clean and whether they need to be replaced.
(5) Check the pipeline carefully to prevent it from leaking.
(6) Test the motors and electrical appliances to ensure their normal operation.
3-Year Maintenance
(1) Send the compressor to the unit designated by the Labor Bureau for testing and check the safety valve.
(2) Check the cooling fan, check valve, etc.
(3) Replace the coolant.
(4) Conduct a comprehensive inspection of hydraulic cylinders or stepping motors, stepping limit devices, etc.
Principles of maintenance and maintenance of natural gas compressors
It is necessary to master certain methods for maintenance and maintenance of natural gas compressors, and at the same time, certain principles and The purpose of prolonging the life of the machine can not be achieved by any other method. The compressor should be maintained regularly, and the importance of maintenance cannot be realized until the compressor is worn to a certain extent.
It is necessary to keep in mind that “maintenance is equally important, and prevention is the first”. The maintenance and maintenance of the compressor is a long-term work. It is necessary to deeply understand the principle of quantitative change and qualitative change. Only regular maintenance can prolong the life of the machine. At the same time, it is necessary to correctly handle the relationship between “cultivation” and “cultivation”, “cultivation” and “use”.
In the process of maintenance and maintenance, pay attention to step by step to ensure quality. Check item by item, do not miss inspection or omission of maintenance, pay attention to record in time during the maintenance process, and report any problems to the relevant departments in a timely manner.
During operation, be careful not to exceed the load of the compressor to eliminate potential safety hazards. At the same time, during the maintenance and maintenance process, pay attention to the accuracy of proofreading equipment to ensure its flexibility; test the safety and reliability of equipment to prevent dangerous accidents.
