Dry vacuum pump and crude oil vacuum flash evaporation treatment device

Abstract

The invention provides a dry vacuum pump and a crude oil vacuum flash evaporation treatment device. The dry vacuum pump comprises an inert gas module, and the inert gas module comprises a gas source,a gas ballast unit, a sealing unit, a purging unit and a control unit. The gas source is used for storing inert gas. The gas ballast unit is connected between the gas source and the pump cavity of a pump body. The sealing unit is connected between the gas source and the sealing ring of the pump body. The purging unit is connected between the gas source and an inlet pipeline of the pump body. The control unit is connected with the gas ballast unit, the sealing unit and the purging unit. The control unit is configured to control the gas ballast unit to convey inert gas to the pump cavity at a first pressure and a first flow when the dry vacuum pump works; and controls the sealing unit to convey inert gas to the sealing ring at a second pressure and a second flow rate to form gas sealing, andis further configured to control the purging unit to purge the pump cavity through the inlet pipeline at a third pressure and a third flow rate when the dry vacuum pump stops working.

Description

technical field [0001] The invention relates to the technical field of vacuum system design of a crude oil vacuum flash evaporation processing device, in particular to a dry vacuum pump and a crude oil vacuum flash evaporation processing device. Background technique [0002] Due to the development needs of offshore crude oil resources, crude oil vacuum flash processing equipment needs to cope with the crude oil demand for generators of different offshore oil platforms. The generators of offshore platforms are running 24 hours a day, and our crude oil flash processing equipment is also 24 hours a day. Non-stop operation, which puts forward very high requirements for the reliability of our system, especially in the vacuum system, the reliability of the vacuum pump is particularly important; In the process, a large amount of condensable gas is pumped into the front-stage dry vacuum pump along with the vacuum system, and condenses in the vacuum pump cavity, which will cause the ...

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Problems solved by technology

[0003] Aiming at the existing crude oil vacuum flash processing device in the process of processing crude oil, the vacuum system extracts a large amount of condensable gas, which enters the dry vacuum pump for secondary compression, and certain condensate will definitely be formed due to the change of pressure; Due to the large amount of continuously extracted gas, the amount of condensate has greatly exceeded the capacity of the vacuum pump, which will cause accumulation in the pump chamber and cannot be discharged in time. The condensate will enter the gear box through the maintenance-free sealing ring of the pump body. , resulting in the emulsification of the lubricating oil in the gearbox. If the emulsified lubricating oil is not replaced in time, it will cause serious failures such as gear wear and vacuum pump jamming due to lubrication failure.

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