Solve the problem of high temperature failure of screw air compressor in summer

High exhaust temperature is a common fault in the operation of air compressor. The long-term operation of the silent oil-free air compressor in a high temperature environment will accelerate the deterioration of the lubricating oil and seriously affect the displacement and service life of the unit. When the temperature rises too high, it will also cause high temperature shutdown failure. There are many reasons for the high exhaust temperature of the air compressor, as follows:

1. Temperature sensor fault. Temperature sensor failure, will cause the PLC false alarm temperature is too high, causing the unit to stop.

2. Environmental temperature factors. Screw air compressor head temperature is generally set at about 110 ℃, and the head outlet temperature is equal to the ambient temperature plus 60 ℃. Most of the mute oil-free air compressor temperature is too high, which is caused by poor environmental ventilation and heat dissipation.

3. Temperature control valve failure. Temperature control valve in the compressor cold start, can make the oil bypass cooler directly injected into the host head, accelerate the rise of oil temperature. To prevent condensation in the compressor, after the normal operation of the compressor, the proportion of oil flowing through the cooler and bypass can be adjusted according to the oil temperature to control the oil injection temperature. If the temperature control valve is damaged or the action is not sensitive, a large amount of high temperature oil will not pass the cooler directly into the host head, resulting in high host temperature.

4. Oil filter failure. The oil filter is used to filter the dust and impurities in the oil circuit. It is easy to be blocked after a period of use, resulting in poor oil return and high temperature of the host.

5. Fault of oil cut-off valve. The oil cut-off valve controls its reciprocating oil injection through the air pressure of the air storage tank. If a fault occurs, the oil circuit is not smooth and the oil temperature is high. Sundries block the oil circuit or control gas circuit, causing the oil cut-off valve to close without oil injection, and also causing high temperature of the main engine head due to lack of oil or poor heat dissipation.

6. Insufficient amount of lubricating oil, dirty or clogged cooler will cause excessive temperature.

7. Cooling fan failure, cooler blockage, increased exhaust resistance, resulting in poor heat dissipation caused by high temperature. The external dust and internal oil of the cooler shall be cleaned.

The air compressor system itself has various problems, which will cause the exhaust temperature of the oil-free air compressor to be too high. Excessive exhaust temperature will cause more failures. In severe cases, it will also cause the host screw to jam or jump. The phenomenon of machine affects the smooth progress of production. So after eliminating these faults, in the daily use of oil-free machine, do we have any way to effectively prevent and alleviate the problem of high exhaust temperature of oil-free air compressor?

Scheme 1: Cooler

generally speaking, after the power consumed by the compressor in the working process is converted into heat, most of it is taken away by the compressed oil and gas mixture. The heat is taken away by the cooling medium (water or air) in the respective coolers (oil cooler and gas cooler), and the heat is wasted in vain.

Scheme 2: waste heat recovery equipment for straight heat tube air compressor

the waste heat recovery equipment of the direct heat tube air compressor is professionally modified according to the structure and principle of the compressor, and its usually wasted heat energy is recovered for domestic and industrial purposes.

Comparison of energy-saving benefits of two schemes

1. Facts have proved that a 100HP screw machine, in the case of 24 hours a day, the air compressor waste heat recovery machine can solve the hot water supply of 1000 employees, and the cost can be recovered in half a year. In the long run, the air compressor waste heat recovery machine can not only solve the hot water used by enterprise employees, but also can be used for cleaning pool heating, drying, heating and other problems.

2. Other functional aspects:

(1) It is beneficial for enterprises to respond to the national energy-saving policy, no longer need to burn oil or electricity to heat cold water, avoid waste of energy, reduce pollution caused by burning oil and electricity, reduce waste heat emissions, and contribute to environmental protection. And actually save you amazing expenses.

(2) It is conducive to the heat dissipation of the air compressor, so that the air compressor can run well. Because of the waste heat utilization, the water heater absorbs most of the heat, so that the operating temperature of the air compressor is between 65-85 degrees, which can stop the cooling fan and reduce the consumption of electric energy, the aging of wire joints, and the deterioration of lubricating oil. problem. Greatly reduce the failure rate of air compressor.