How to operate ammonia compressor safely?

Ammonia compressor compresses gaseous ammonia into liquid ammonia. The compressor is piston type. So how to operate ammonia compressor safely?

1. Inspection before startup

1. Check whether the setting values ​​of each automatic maintenance relay meet the startup requirements.

2. Check whether the oil level meets the requirements. The oil level should be maintained at 1\/22\/3 of the oil sight glass.

3. Check the status of all valves in the system. The suction stop valve, refueling valve, and bypass valve should be closed. Other valves on the oil and gas circulation pipelines should be opened. Pay special attention to the fact that all valves on the pipeline from the compressor exhaust to the condenser must be opened and the oil system must be unobstructed.

4. Check whether the water circuits of the condenser, evaporator and oil cooler are unobstructed, and whether the water valves and water pumps can work normally.

2. Operation process

1. Start the water pump to circulate the water.

2. Open the exhaust stop valve, the valves before and after the oil filter, and the gauge valve.

3. Turn on the power control switch and check whether the voltage, control light and oil level are normal.

4. Start the oil pump. After it runs normally, open the cooling water valve of the oil cooler.

5. Check whether the energy indication is at zero position and turn the 4-way valve handle to the load-reducing position.

6. Start the compressor, open the suction stop valve, and check whether the oil pressure is higher than the exhaust pressure by 0.150.3MPa.

7. Increase the load several times and open the liquid supply valve accordingly. If the unit operates normally, continue to increase the load to the required energy position, then move the 4-way valve handle to the stop position to allow the unit to continue operating under normal conditions.

8. After the unit is running normally, please pay attention to check and record the suction pressure, exhaust pressure, suction temperature, exhaust temperature, oil temperature, voltage and current value in time.

3. Normal shutdown

1. Turn the energy conditioning 4-way valve handle to the load reduction position, close the liquid supply valve, and close the air intake stop valve.

2. When the slide valve returns to the 4050 percent position, press the host stop button. After the host stops running, close the suction stop valve.

3. After the load is reduced to zero, press the oil pump stop button. The water pump will be stopped or turned on depending on the application.

4. Cut off the power supply of the unit.