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In HDD mud recovery system, vacuum degasser used vacuum pump suction effect.

2019-12-10

In HDD mud recovery systemvacuum degasser used vacuum pump suction effect, cause negative pressure zone in a vacuum tank, mud under the action of atmospheric pressure vacuum degasser, through the suction pipe into the hollow shaft of rotor, again by the window around the hollow shaft, the jet shaped into the tank wall, round due to the collision and separation effect, make the separation of drilling fluid into thin layer, the invasion of mud bubbles, gas evolution, through vacuum pump suction and the separation of gas water separator, the exhaust pipe line to the safety of gas by the separator, the mud by the impeller discharge outside the tank. Since the main motor starts first, the impeller connected with the main motor rotates at a high speed, so the mud can only enter the tank from the suction pipe, not from the drain pipe.

Precautions for the use of vacuum degasser:
1. Before the use of the equipment, open the overflow valve, inject water into the gas-liquid separator to flow out of the overflow port, and then close the valve;
2. Before the equipment is used, open the ball valve of the circulation pipeline between the separator and the vacuum pump, and inject an appropriate amount of water into the vacuum pump to prevent the vacuum pump from drying and burning the mechanical seal;
3. Start the main motor first, and the impeller connected with the main motor rotates at a high speed, then start the vacuum pump; When the equipment is shut down, the order is the opposite, that is, first shut down the vacuum pump motor, then shut down the main motor, to ensure the normal operation of the equipment;
4. If the equipment is shut down for a long time, empty the vacuum pump and the liquid in the air and water separator;
5. Exhaust gas to a distance during use to avoid injury to personnel.

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