1. The air compressor system pressure is too high. Compressor emergency shutdown, gas venting or backflow; the one-way check valve on the outlet pipeline is not flexible and does not close tightly; or the one-way valve is too far away from the compressor outlet, the gas volume in front of the valve is large, the system suddenly drops, and the compressor does not The time is adjusted, and the anti-surge system is not put into automatic operation.

2. Insufficient suction flow. Due to external reasons, the suction volume is reduced below the surge flow rate, and the rotational speed causes the compressor to enter the surge region, causing surge. The reason for this situation is: the compressor inlet filter is clogged, the resistance is too large, and the compressor speed cannot be adjusted, resulting in surge; if the filter element is too dirty or frozen in winter, this may happen; the intake air source Reduce or cut off, such as insufficient air supply to the compressor, no supplementary air source to the compressor, etc. If these conditions are not discovered in time, they should be adjusted in time.

3. The mechanical parts are damaged or fall off. Mechanical seals, balance disk seals, O-rings and other components are not installed completely, and the installation positions are not accurate or fall off, which will cause crosstalk between horizontal sections and may cause surge; excessive filter resistance, check valve failure or damage may also cause Surge.

4. When the air compressor is running, the speed and pressure increase are too fast, and the pressure is not lowered before the speed is reduced. The velocity rise and pressure rise should be slow and even. Pressure relief measures should be taken before deceleration: such as venting, backflow, etc., to avoid backflow of air after deceleration.

5. Changes in working conditions. The working point of the air compressor falls into the surge area, and the working condition changes. For example, the operating point falls into the surge region without checking the characteristic curve before changing the speed, flow and pressure.

6. When the air compressor is running normally, the anti-surge system is not automatic. When external factors change, such as steam pressure drops or gas volume fluctuations, turbine speed drops, the anti-surge system does not have time to manually adjust or air is interrupted, which may cause surge due to the absence of an automatic anti-surge device.

• The surge caused by the change of the medium state may be closely related to the state of the gas medium. Because the state of the gas affects the flow, it also affects the surge flow, and of course, it affects the surge. For example, inlet temperature, inlet pressure, and gas composition (ie, molecular weight) all have an impact on surge. When the speed and outlet pressure are high, the stability of the intake air increases, and surge is prone to occur; when the speed is constant, the higher the inlet pressure, the larger the surge flow value; when the inlet pressure is constant, the speed is constant, the molecular weight of the gas is greatly reduced, and it is easy to Surge occurs.

Sollant Group-Professional Compressed Gas Solutions Provider