Retrofit of Piston Air Compressor Cooling System

Technical version transformation and renewal of piston air compressor cooling system transformation Peng Changhe, Hao Xuqing (Henan Shenhuo Aluminum Co., Ltd., Yongcheng, Henan 476600) comparative analysis, equipment design research and practice, improve equipment operation Efficiency increases economic efficiency.

Henan Shenhuo Aluminum Industry Co., Ltd. currently uses 8 units of 100/10-a piston air compressors for the production of 210,000 tons of electrolytic aluminum production lines. Cylinder lubrication is driven by a motor driven piston pump and is supplied by a combination of oiler and check valve. The lubricating oil is LDAB150 air compressor oil. The amount of lubricant injected affects the normal opening and closing and coking of the valve. The 丨 and 丨丨 stage cylinders are cooled by series cooling; the middle and rear chillers are all equipped with an interposer type cooler, the inner insert is in the form of a spiral mesh, and the compressed air is spirally conveyed by the tube, and the cooling water is cooled by the shell.

Since the cooling system uses series cooling, that is, cooling water flows from the intercooler to the I and the stage cylinders, the intermediate and rear coolers are equipped with an interposer type cooler. In operation, the water channel is easy to block, easy to leak, and the cooling efficiency is poor. The intake air temperature of the 丨丨 class is often around 70 °C, and there are serious hidden dangers. After the plug-in is used for a period of time, due to adhesion of dirt and carbon deposits, the wind resistance is increased, resulting in over-pressure of the exhaust gas at the level and the exhaust, causing the overpressure protection action to stop. Therefore, in order to ensure the safe and efficient operation of the equipment, it is proposed to modify the cooling system of eight air compressors.

The design should ensure that the original characteristics of the equipment do not change, the overall dimensions are the same, and they are interchangeable and operability.

Increase by 10.902m2, which is equivalent to the original cooling area increased by 174.79%. After weight G = 259.8kg, the weight of the cooler is increased by 74kg, which is equivalent to the original cooler weight increase of 139%. (3 life cycle: the original cooler contains the plug-in for 6 months Replacement, can not be reused; after the transformation, cancel the plug-in, the maintenance cycle is 1 year.

(4) Temperature comparison: Before the reform of the middle and rear coolers, the inlet water temperature is <45°C, the first stage exhaust is <140°C, the stage intake is <60°C, the stage exhaust is <130°C, and then cold. Exhaust <60°C; reformed inlet water temperature S32°C, drainage temperature <45°C, 丨-class exhaust <140°C; 丨丨-class intake <43°C, 排气-class exhaust<120° C, after the cold exhaust <45 ° C. Through the transformation to optimize the operating parameters of the air compressor, to ensure the safe operation of the air compressor.

Due to the elimination of the plug in the cooler, the design pressure of the exhaust system is <.3mpa.>

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