Treatment method of ammonia refrigerant in refrigeration equipment

　　【】When low-pressure equipment needs to be overhauled, the connection between the equipment and the refrigeration system must be cut off, a channel must be selected, the ammonia in the equipment must be sucked clean with the refrigeration compressor, and then the atmosphere can be connected to the equipment to repair the equipment. In the process of handling ammonia, it is necessary to be careful and repeated inspections to ensure safety in case of accidents.

　　1. Treatment of low-pressure equipment

When the low-pressure equipment needs to be overhauled, the connection between the equipment and the refrigeration system must be cut off, a channel is selected, the ammonia in the equipment is sucked clean with the refrigeration compressor, and then the atmosphere is connected , The equipment can be repaired. In the process of handling ammonia, it is necessary to be careful and careful, and to check repeatedly to ensure safety in case of accidents.

　　 (1) Prepare all the tools needed for maintenance, and prepare safety protection facilities, such as gas masks, ventilators, rubber gloves, rubber hoses and first aid supplies.

　　 (2) Cut off the connection between the accident equipment and the refrigeration system, and put a ban on the closed valve.

　　 (3) Select an ammonia extraction line to drain the ammonia from the equipment to be repaired. For example, for the evaporator, the discharge pipeline of hot ammonia defrost should be selected to pump the ammonia to the discharge barrel or the circulation barrel.

After the valve of 　　(4) system pipeline is adjusted correctly, the selected ammonia pipeline can be used to turn on the compressor for evacuation. When the low pressure pressure drops below 0MPa, stop the machine, and restart the evacuation after the pressure rises. This is repeated 2-3 times, and the pressure rises slightly and is below 0MPa, indicating that the equipment has been evacuated.

　　(5) If the ammonia in some equipment is not easy to drain, you can vent it through a vent valve or use a rubber tube to put the ammonia into the condenser pool or outdoor bucket.

　　(6) After the equipment to be overhauled is evacuated, the atmosphere should be connected to it to let the ammonia gas escape and reduce the concentration. Repair the equipment can only be carried out after everything is correct.

　　2. Treatment method of high-pressure equipment

The treatment of ammonia during the maintenance of high-pressure equipment should be considered in terms of safety. Ammonia can be sent to the low-pressure equipment through a connecting pipeline, for example, through a drain pipe, an oil collector, and then a reduction The pressure pipe sends the ammonia to the drain tank or low-pressure circulation tank for storage.

　　After the ammonia in the high-pressure equipment is discharged into the low-pressure equipment, the remaining ammonia can pass through the oil drain line and the drain valve of the oil collector, and then through the rubber tube, into the condenser pool or Inside the sewer.

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