Sliding air compressors are used in a wide range of applications. The machine is an L-type two-cylinder two-stage water-cooled piston type with a displacement of 40m3/min and a maximum discharge pressure of 0.8MPa. After the compressor is compressed, the secondary exhaust temperature can reach 120~160. When the next step is carried out, after the compressed air is cooled, the temperature is lowered to 40* or less, so that some of the steamed water vapor in the compressed air is condensed and precipitated.

In the process of air compressor conveying compressed air, we will find that the frequent jump phenomenon due to the high temperature of the secondary exhaust gas affects the normal production of the enterprise. According to the actual situation of the enterprise, the main reason for this phenomenon is as follows.

2 Reason analysis 2.1 Air valve The air valve is the passage of gas into and out of the compressor. The sealing of the valve is related to whether the compressor is running stably. The gas valve is a wearing part and is extremely leaky. Air leakage of the suction valve will reduce the intake air volume, increase the temperature inside the cylinder, and increase the exhaust gas temperature; the air leakage of the exhaust valve will reduce the displacement and the intake air amount, so that the compressed gas flows backward, so that the cylinder The internal temperature rises and the exhaust temperature rises.

(i manufacturing quality problems, such as valve warpage, etc., so that the valve plate is not tightly closed and leaking; Q is leaking due to serious wear of the valve seat and the valve plate; metal fragments or other drops between the Q valve seat and the valve plate Miscellaneous, causing the valve to tilt, the closure is not tight and leaking; (4 valve valve breaks, valve spring failure, will form a leak. In addition, the valve is not placed in place, the valve tilt, it will cause The valve is leaking.

2.2 The piston ring wears too much crack, which will cause the sealing effect of the air compressor cylinder to be worse. The gas on the compression side will pass through the piston ring and the side of the suction side will be caused, causing the internal gas to occur in the cylinder body and the cylinder body to heat up. Increase the exhaust gas temperature.

2.3 The cooling effect is poor After the air compressor has been operated for a long time, there are more scale and sludge in the middle water jacket of the cylinder, which reduces the heat exchange effect.

The blockage of the water cooler sub-tube bundle of the intercooler causes the cooling water flow to decrease, the useful cooling area is reduced, the cooling effect is reduced, and the first-stage exhaust gas temperature is not effectively reduced, so the secondary intake air temperature is increased, causing the secondary exhaust gas. The temperature also rises. The rear cooler is not drained in time, causing excessive water accumulation, causing the secondary exhaust to be blocked, and the exhaust gas is not smooth, causing the secondary exhaust gas temperature to rise.

2.4 Intercooler Compressed air short circuit Because the gasket at the intercooler baffle is detached or the bezel weld is cracked, part of the compressed air is not sufficiently cooled by the intercooler, and the short circuit enters the secondary cylinder, causing the secondary cylinder intake temperature. Too high, so that the secondary exhaust temperature rises too fast.

2.5 The ambient temperature is in the afternoon, the temperature can reach 37~38 ft., far exceeding the original design intake temperature, and the cooling effect of the cooler is not good, which causes the compressed air temperature to rise.

3Solutions 3.1 Regularly check and check the valve for necessary maintenance and configuration. Use the rod to auscultate the valve. The sound of the valve is clear, indicating that the gas valve parts are normal. If you hear “嘶嘶” The screams, the valve may be damaged or the valve has leaked. Touch the bonnet temperature by hand. If the bonnet temperature is high, you can judge that the valve is leaking or damaged. Damaged air valves must be repaired or replaced in a timely manner.

3.2 Regularly check the piston ring to regularly replace the sealing ring with better elasticity to ensure that the gap in the cylinder does not exceed the standard, improve the sealing effect inside the cylinder, and prevent the compressed air from being trapped inside the cylinder.

3.3 Reconstruction and cleaning of the water cooling system There are more scales and sludges in the water jacket of the cylinder body, and the cooling water flows poorly. The ice scale and sludge accumulated on the cylinder head increases the cooling water pipe in one step and one time, and flushes regularly. Prevents the deposition of scale and sludge; at the same time, the water quality of the cooling water should be strictly ensured, the design requirements should be met, and the fouling or blockage of the cooling water system wall should be reduced; and the cooler should be dismantled and cleaned periodically, and the water in the cooler should be drained regularly. , thereby improving the cooling effect of the device.

3.4 Regularly replace the gasket at the baffle of the intercooler to ensure that the compressed air coming out of the cylinder is passed through the intercooler to avoid short circuit of the compressed air.

3.5 Reduce the cooling water temperature When the summer temperature is particularly high, try to increase the circulating water supply pressure and reduce the cooling water inlet temperature, generally below 35 feet, taking into account the intercooler and cylinder water jacket withstand pressure conditions, the water pressure is not higher than 0.35 MPa. 4Solutions Through the above analysis and solutions, the equipment management is strengthened in daily work, and the key parts of the equipment are regularly inspected, and problems are dealt with in a timely manner. The air compressor can be jumped due to excessive exhaust temperature. Solve, the stable production of the company can be guaranteed.

A: The compressed air drying process is always accompanied by the loss of compressed air, which is an energy loss. Since the user is very concerned about the consumption of gas during the regeneration process, it is very attractive to achieve zero gas consumption.

The so-called "zero discharge" in the adsorption dryer can only be understood as the case where the compressed air outputted by the machine is not consumed at all, and the cooling stage during the water decomposition absorption and regeneration cannot have the loss of compressed air.

The non-thermal regenerative dryer and the ''micro-heat' regenerative dryer are impossible to achieve zero emissions due to the complete dependence on the machine's dry compressed air. However, for heating regenerative dryers that use ambient air as the desorption medium, at least In theory, there is more than one way to achieve "zero emissions", such as the use of naturally cooled "multi-tower" structure dryers or external wall water-cooled "water-cooled" type dryers and "vacuum desorption" widely used in other fields. However, the technical feasibility, universal applicability and comprehensive cost of these methods must be evaluated beforehand. If the cost of achieving zero emissions is higher than the traditional regeneration method, the application value in the field of compressed air drying will be lost.

2-people Tent

Zhejiang Shengfa Textiles Printing&Dyeing.,ltd , https://www.chzjsf.com