Cause Analysis and Countermeasure of High Dew Point of Oil-free Screw Air Compressor in Medium Nitrogen Fertilizer Huang Changsheng Jin Junjie Du Yanfeng Zhao Hongzhou Shandong Yankuang International Coking Co., Ltd. Shandong Luzhou 27210, 2 Yankuang Group Co., Ltd. Coal Chemical Branch. Shandong Zoucheng 1 situation overview Shandong Yankuang International Coking Co., Ltd. production system of instrument air and, Ningning gas Shanzhi 142655 oil-free screw air compressor supply, a single air pumping capacity of 64nimip air pressure 06MPil only l 10 The air storage tank is buffered, and the air compressor is usually opened and ready for use. The compressed air consumption is about 4,000. The production system has repeatedly appeared the instrument regulating valve automatically in the case of no signal, which causes the system to jump seven, which brings great loyalty to the operation of the system. After the inspection of the apricot, it is found that there is rust in the air channel of the instrument farmer. And a small amount of water is discharged, especially at the orifice of the self-adjusting part, each time there is ice slag, and the water can be discharged at the discharge of the compressed air buffer tank, so the air of the judgment instrument is brought with water. By testing the air dew point from three air compressors, it is found that the dew point is 202730, respectively. 1 According to the climatic conditions of + ground, the dew point should be lower than 451. Obviously, the actual dew point can not meet the quality requirements of the instrument. By disassembling the air compressor and related equipment to find the original, the final question is solved.
2 equipment operation status and judgment processing month replacement, usually the molecular sieve life of 35 is calculated according to its working time should not reach the expiration date. Through the operation parameters of the compressor and the operation status of the site, it is found that the displacement of the ice separator is larger than that of the dryer. The temperature is higher after the gas is cooled by 2; the water separator has less water discharge, and the temperature of the upper part of the dryer is higher after cooling; 3 molecular sieves are replaced in April 2009, the displacement is less, and the temperature is normal.
2.1 Dismantling and cleaning conditions and treatment measures Firstly, the machine was found to be rusted on the outlet pipe of the gas cooler and the inner wall of the dryer. It is suspected that the cooler has internal leakage. After the water pressure test, it was found that two heat exchange tubes were damaged. In the progress inspection, it was found that the wear between the molecular sieve shaft and the regeneration gas seal was severe. The damaged heat exchange tube and the worn parts were treated and repaired.
Pay 2; the machine is dismantled.柞 It was found that the wear between the split screen shaft and the regenerative gas seal was severe, and the repair was carried out in the same way as the one machine.
The above question was not found after the 31 demolition inspection, but the molecular sieve obviously had 15 humidity and the color was deep. After inspection, I found out. The dryer does not rotate normally but the rotor drive motor rotates normally. Through the inspection of the reduction gear, it was found that the reduction gear positioning shaft was broken, which caused the two-stage gears to be unable to mesh, causing the motor to rotate but the dryer rotor could not rotate, so that the molecular sieve could not be regenerated, and the adsorption capacity of the molecular sieve was saturated and lost its adsorption function, resulting in air dew point. High. Therefore, the D-repair of the reduction gear positioning axis, 2.2 before and after the data comparison and maintenance before the 1 machine compression empty point of the point of the 21 maintenance factory to reach the pre-repair pre-retracted Ning gas dew point of 27, the treatment 1 reached 52 before the maintenance 34 machine The dew point of compressed air is 30; after maintenance, it reaches 55. After the overhaul, the dew point of compressed air of three air compressors meets the local 3 conclusions. Oil-free lubricating screw air compressor is widely used in chemical production. Shandong Yankuang International The invisible fault of Coking Co., Ltd. air compressor has been solved through overhaul, thus ensuring the quality of the air of the instrument, and ensuring that the author of the department is Huang Changsheng, 197 male, Tengzhou, Shandong, senior worker
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