Zhigao screw air compressors are widely used in many fields, equipped with built-in cooling systems, simple installation, high work efficiency, and strong reliability. However, in practical applications, screw air compressors equipped with air cooling systems often encounter high oil temperatures, which seriously affects the efficiency of the equipment. In this regard, water cooling renovation can be carried out on the equipment, and maintenance work for the air compressor can be done to ensure its safe and reliable operation< Br/>
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1、 Introduction: A certain sewage treatment plant uses Zhigao screw air compressor to provide compressed air for the continuous sand filter. The unit includes three air compressors, one condenser, and one pressure tank, which are combined with six air control devices in the sand filter system to control the pressure and flow of compressed air. The air compressor adopts a dual use and one backup operation mode, and operates relatively stably during use, However, the air compressor is prone to high temperature Halting problem, which affects the production efficiency to a certain extent. The main reason for the analysis is that the working environment is harsh, and dust in the air can easily enter the air compressor, leading to blockage of the heat exchanger and filter element, which affects the normal operation of the heat exchanger and causes the air compressor to automatically shut down due to a high temperature alarm. After expert research and discussion, it was decided to transform the existing air cooling system into a water cooling system to improve the cooling effect of the air compressor< Br/>


2、 The basic principle of water-cooled transformation of water-cooled systems is to use the basic laws of heat transfer to absorb the heat emitted during equipment operation using cold water. In air compressor equipment, water-cooled transformation mainly involves building an internal circulation system with cooling towers, equipment, and heat exchangers. When there is loss of circulating water, it is necessary to replenish it in a timely manner. During the operation of the air compressor, the high-temperature lubricating oil and high-pressure compressed gas inside will enter the heat exchanger and undergo heat exchange with the cooling water inside the shell. After the temperature drops to a certain extent, the lubricating oil will return to the main engine and continue to participate in circulation. Compressed air will be discharged from the outlet, and the cooling water will take away the heat and enter the cooling tower. After cooling, it will be pressurized by the water pump and enter the system circulation again. During this process, cooling water can continuously enter the heat exchanger, allowing cooling to occur at any time. Compared with air cooling systems, the cooling effect is significantly enhanced< Br/>


The actual operation process of water cooling renovation is as follows: firstly, set up the water tank, select an appropriate location, excavate a water tank of about 300mm on the ground, determine the size according to the actual situation, compact the pit bottom, lay a layer of pebbles, and then use reinforced concrete to cushion the bottom to ensure good sealing effect. The main body of the water tank adopts a brick concrete structure, with a peripheral size set at 1780× 1780× 1490mm, with a wall thickness of 130mm, and an overall capacity of 2m3 for the water tank. From the bottom of the pool upwards, add two No. 10 steel bars every 500mm, and evenly apply waterproof coating on the inner side of the wall to improve the waterproof and sealing performance; The second is the foundation of the water pump. In order to ensure that the water pump can maintain stability during operation and avoid negative effects caused by vibration, channel steel is used to make the water pump base, with a size of 100× 50mm; threeThe stability and reliability of operation have also been effectively guaranteedIt can provide some reference for the renovation work of similar equipment.