York propane compressors: maintenance, overhauling, upgrading, and renovation services

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The natural gas extracted from the gas wells enters the gas gathering station, where it undergoes processes such as throttling, alcohol injection, separation, and filtration before being sent to the natural gas processing plant via the main gas gathering lines. The raw natural gas exhibits retrocondensation; as pressure and temperature drop during transportation, liquids are formed, which does not meet the requirements for product natural gas regarding a water dew point of -13°C and a hydrocarbon dew point. Therefore, it is necessary to remove oil and water from the natural gas. Typically, natural gas processing plants use low-temperature condensation processes for oil and water removal. https://p1-tt.byteimg.com/origin/pgc-image/de00b405d6e14c489fa91805e7beefbd?from=pc The low-temperature condensation process involves cooling natural gas to lower temperatures under certain pressures; by taking advantage of the different volatilities of the various components in natural gas, some of these components are condensed into a liquid state, and then separated from the natural gas using separation equipment. Based on the actual conditions of the gas field, and with the aim of controlling the water and hydrocarbon dew points in the natural gas exported to meet customer requirements, it is sufficient to use an external cooling source to condense the natural gas to temperatures between -20°C and -30°C, thereby removing water and liquid hydrocarbons. The compressors used for natural gas dehydration and dehydrogenation in York are equipped with propane (R290) as the refrigerant. At room temperature, propane is colorless and odorless; it is flammable and explosive. It is an environmentally friendly and healthy refrigerant with a low latent heat of vaporization, resulting in a low cooling capacity per unit volume. The suitable cooling temperature range is between -35°C and 40°C. https://p6-tt.byteimg.com/origin/pgc-image/d29c818055224844b86d38652d804e2d?from=pc The York propane compressor compresses the R290 gas and discharges it from the exhaust port. The lubricating oil contained in the refrigerant is separated in an oil separator; after being cooled to an appropriate temperature in an oil cooler, it returns to the compressor. The R290 gas is condensed into a liquid in the air-cooled condenser and cooled in the economizer; the cooled refrigerant liquid then enters the full-liquid evaporator after being throttled. In the evaporator, the low-temperature refrigerant cools the heat carrier while evaporating into a gas and returning to the compressor, thus restarting the cycle. The main product series of propane compressors currently installed and in use in China include the RWB, RXF, RWF series, etc., which are used in oil and gas fields, natural gas production plants, gas storage facilities, LPG storage tanks, and other such locations. https://p1-tt.byteimg.com/origin/pgc-image/21608845606e4cceb5b9be5d6636a745?from=pc Shandong Gongleng Hui Network Information Technology Co., Ltd. is a company that specializes in providing MRO services for propane compressors. It has over 10 years of experience in the debugging, maintenance, and overhaul of York’s full range of propane compressors; it possesses the capabilities to inspect, repair, overhaul, and debug compressor units, as well as to offer services for upgrading control systems. The York propane compressor services provided by Gonglenghui mainly include the following: 1. On-site major repair and maintenance of the propane compressor head: 1. Nitrogen displacement of propane inside the compressor head and the oil separator, based on the actual conditions of the propane compressor at the site ； 2. Remove the coupling, pipes, bolts, etc., connected to the compressor head ； 3. Lift the compressor head to the designated maintenance area in the machine room ； L4: Remove the compressor shaft seal, inspect its sealing surface and clearance, and make notes ； 5. Remove the front and rear end caps of the compressor as well as the slide valve chamber, use specialized tools to measure the clearances, and make notes of them ； 6. Use special tools to remove the bearings, male and female rotors, as well as the slide valve sliders ； 7. Clean the compressor chamber, as well as the oil circuits, bearings, male and female rotors, slide valves and sliders inside the chamber, and repair the worn parts ； 8. Replace the worn bearings; use specialized tools to reinstall the compressor’s male and female rotors into the compressor chamber, and adjust their positions ； 9. Adjust the clearance between the male and female rotors; use specialized tools to detect and correct axial play, ensuring it meets Frick’s manufacturing requirements, and keep records of this ； 10. Replace the compressor balance piston assembly and adjust the clearance ； 11. Replace the compressor seal, and restore the front and rear end caps of the compressor as well as the slide valve chamber ； 12. Replace the compressor shaft seal; manual rotation proceeds smoothly ； 13. Replace the compressor slide valve and slider potentiometer ； 14. Install the compressor back onto the unit skid ； 15. Inspect and install the coupling, and align the compressor with the motor ； 16. Conduct an 8-hour no-load test run, check whether the current drawn by the motor components, the motor’s temperature rise, vibration, and noise are within normal ranges, and keep records of these measurements. https://p3-tt.byteimg.com/origin/pgc-image/923691f70b7f4562a2aa020c4459236a?from=pc II. PLC control inspection: 1. Check the programs of the distributed PLCs ； 2. Verification and adjustment of each module ； 3. Adjust the control program parameters and verify the program through testing ； 4. Check and verify various pressures and temperatures ； (Including, but not limited to, transmitters for suction and exhaust air, oil pressure, etc.; transmitters for suction and exhaust air, oil temperature, etc.; as well as motor stator temperature sensors, etc.) 5. Check and verify the compressor vibration probe ； 6. Check whether the instrument air is functioning properly ； 7. Check and verify the spool and slider position sensors ； 8. Inspect and calibrate the liquid level transmitter and the liquid supply pneumatic valve of the full-liquid evaporator ； 9. Protection test checks at the control center ； 10. Check the overload protection device of the drive motor ； 11. Reliability inspection and verification of the actuator and solenoid valve operations ； 12. Simulation operation, control and protection verification ； 13. Perform a trial run of all actuators and solenoid valves in pulse mode; they operate normally and the protection functions work correctly ； 14. DCS data connection, verification, and repair ； III. System inspection and maintenance: 1. Replace the dedicated refrigeration oil and oil filter element ； 2. Check the oil circuit system to confirm that all oil circuit valves are in their proper positions ； 3. Check whether the valves related to the unit’s propane system are open ； https://p1-tt.byteimg.com/origin/pgc-image/c76adcc02c5347b9b0481a86698ee38e?from=pc 4. Start the unit and operate it at different loads, checking whether the current, motor temperature rise, and noise are normal, while keeping records ； 5. After running for over 4 hours, perform a thermal alignment check on the motor and compressor ； 6. Adjust the evaporator level and the liquid supply valve according to the system’s operating conditions ； 7. Check whether the oil temperature tee valve is functioning properly ； 8. Inspect the propane system; check whether the flash economizer is functioning properly and make adjustments as necessary ； 9. Submit unit maintenance reports and put forward rationalization suggestions for equipment operation management ；