How to reduce the exhaust temperature of air compressor under high temperature

- Feb 11, 2019-

Air compressors are prone to high exhaust temperatures during actual operation in high temperature weather conditions. Reasons should be analyzed and appropriate measures taken. Users of De Nair air compressors can refer to the following measures:

Reduce the intake air temperature. The intake air temperature of each stage is related to the cooling imperfection of the intercooler. Therefore, the cooling effect of the intercooler should be ensured as much as possible, or some special cooling measures should be used to reduce the intake air temperature and reduce the exhaust temperature.

How to reduce the exhaust temperature of air compressor under high temperature

1. The final temperature of the intake air in the cylinder is also an important factor affecting the exhaust temperature. The temperature at the end of the intake air is related to the pressure loss of the intake and exhaust. Therefore, in the maintenance of the air compressor, attention should be paid to the installation of the valve and the selection of the spring. Under the premise of ensuring the normal operation of the valve, the pressure loss of the intake and exhaust pressure should be minimized. In order to achieve the purpose of reducing the exhaust gas temperature.

2. The compression process index also affects the exhaust temperature. In actual operation, the compression process index is mainly related to the cylinder cooling condition. The better the cooling effect, the smaller the index and the lower the exhaust temperature. Therefore, the exhaust gas temperature can be lowered by strengthening the cooling of the cylinder.

3. Internal leakage is one of the causes of high exhaust gas temperature. Especially in the stage of expansion and suction of a certain stage of the air compressor, if the exhaust valve of this stage is not closed tightly, the high temperature and high pressure gas in the exhaust pipe which is cooled in the future will be returned (internal leakage) to the cylinder, which will make the stage The gas temperature rises sharply.

4. For multi-stage compressors, it is more complicated to adjust or reduce the exhaust temperature of a certain stage. For example, if a certain stage of exhaust gas temperature is found to be high, if the clearance (increase) clearance volume is used, the pressure ratio of the stage is appropriately lowered, so that although the exhaust temperature of the stage can be lowered, it will be made before. When the pressure ratio of the first stage increases, the exhaust gas temperature rises; if it is attempted to reduce the exhaust gas temperature by strengthening the cylinder cooling and reducing the compression process index, the pressure ratio of the stage will decrease and the pressure ratio of the latter stage will increase. And the exhaust gas temperature increases in the latter stage; when the intercooler cooling effect before the step is strengthened, although the exhaust gas temperature can be lowered to lower the exhaust gas temperature, the intake pressure of the stage is correspondingly lowered, thereby The pressure ratio of the stage is increased, so the effect of lowering the temperature of the exhaust gas is not significant. Therefore, an integrated method is needed, for example, while the pre-stage cooling is performed, the volume of the stage is appropriately increased, so that the pressure ratio of the stage is maintained, and the exhaust temperature of the stage is effectively reduced.