Rotary Vane Vacuum Pump for Deaerator
There are three types of deaerator, vacuum deaerator, atmospheric deaerator and centrifugal deaerator.
There are two main reasons for choosing rotary vane vacuum pump for deaerator. One is to suck the gas-invading mud in the mud tank to the top of the degassing machine, so that it is on the baffle, on the cone or on the funnel. A thin layer of flow is formed on the top.
And the second is to discharge both the released gas and the incoming air in the degassing tank. Rotary vane vacuum pumps also generate a pressure that expels gas through a slender exhaust line. It is very important to ensure that the float is always functioning properly to prevent the slurry level in the tank from rising and entering the rotary vane vacuum pump through the line.
A dehydrator is installed on the vacuum line, which is usually used to collect the water vapor in the hot mud and condense it into a liquid at the bottom. When the deaerator is turned off, the water can be released. The upper part of the dehydrator is equipped with a float ball with a safety valve.
If the water vapor condenses or the liquid level in the vacuum tank is too high and the mud enters the dehydrator, the float will close the passage to the vacuum pump. When the safety valve on the upper part of the dehydrator leaks and the mud enters the vacuum pump, the cylinder block, piston ring and bearing will be subject to abrasion.
If this happens, the rotary vane vacuum pump must be disassembled and thoroughly cleaned. If the safety valve is stuck and left open, a large amount of mud will flow through the safety valve, damaging the valve, piston and tie rod. Mud paddles entering the crankcase will cause the oil level to rise. This is also a symptom that the float valve has failed.
How a vacuum deaerator works
The vacuum deaerator uses the suction effect of the vacuum pump to create a negative pressure area in the vacuum tank. Under the action of atmospheric pressure, the mud enters the hollow shaft of the rotor through the suction pipe, and then is thrown to the tank in a jet shape from the window around the hollow shaft.
Due to the collision and the action of the separation wheel, the drilling fluid is separated into thin layers, the bubbles immersed in the mud are broken, and the gas escapes. Through the suction of the vacuum pump and the separation of the gas-water separator, the gas is discharged from the exhaust pipe of the separator. It is discharged to a safe area, and the mud is discharged out of the tank by the impeller.
Since the main motor starts first, the impeller connected to the motor rotates at a high speed, so the mud can only enter the tank from the suction pipe, and will not be sucked from the discharge pipe.
Rotary Vane Vacuum Pump for Deaerator
The suction of the rotary vane vacuum pump is used to make the mud enter the vacuum tank, and the gas is drawn out of the vacuum tank by using it. The vacuum pump plays two different roles here.
During the working process, the rotary vane vacuum pump is always in an isothermal state, suitable for the suction of flammable and explosive gases, and has reliable safety performance.
The mud is shot to the four walls at high speed through the window of the rotor, the air bubbles in the mud are completely broken, and the degassing effect is good.
The main motor is biased, and the center of gravity of the whole machine is lowered.
The belt drive is adopted to avoid the complexity of the deceleration mechanism.
The application of the steam-water separator will not cause water and gas to be discharged at the same time, so that the exhaust pipe is always smooth. In addition, water can be circulated to the vacuum pumpto
The suction pipe is inserted into the mud tank, which can be used as a high-power agitator when the mud is not gas-immersed.
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