Electric desalting tank for dewaxing residual oil

Abstract

The invention discloses an electric desalting tank for dewaxing residual oil, and belongs to the field of crude oil processing equipment. The electric desalting tank comprises an electric desalting tank main body; a square pipeline is arranged at the inner bottom of the electric desalting tank main body; one end of the square pipeline is connected with one end of a high-pressure pipeline through asealing bearing and internally communicates with the high-pressure pipeline; the high-pressure pipeline penetrates through one side of the inner wall of the electric desalting tank main body and is connected with the electric desalting tank main body through a sealing bearing; the other end of the square pipeline is fixedly connected with one end of a first rotating shaft; sludge discharge pipelines with stop valves are fixedly mounted on the two sides of the bottom surface of the outer wall of the electric desalting tank main body respectively; and the sludge discharge pipelines are communicated with the interior of the electric desalting tank main body. According to the tank, the water spraying position on the square pipeline is controlled by controlling the position of a square sleeve,so compared with a mode of continuously spraying water by a plurality of spray heads in a backwashing system on an existing electric desalting tank device, the mode adopted in the invention has the advantages that the water consumption can be effectively reduced, residual crude oil can be conveniently extracted from sewage, oil sludge can be more easily scraped out by a scraping plate, and the cleaning effect is further improved.

Description

technical field [0001] The invention belongs to the field of crude oil processing equipment, in particular to an electric desalting tank for residual oil dewaxing. Background technique [0002] After the electric desalting tank desalts and dehydrates the crude oil, the sludge will deposit in the lower part of the water layer at the bottom of the electric desalting tank, and it will accumulate more and more. The insoluble sludge will deposit at the bottom of the electric desalting tank, gradually reducing the volume of the electric desalting tank It affects the normal operation of the electric desalination tank, and also affects the desalination effect. The continuous backwashing operation is not effective in eliminating sludge deposits. Refining, the existing electric desalination tank device cleans its interior by spraying high-pressure water through perforated pipe holes or nozzles. However, this cleaning method consumes a lot of water and increases the follow-up sewage tr...

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Problems solved by technology

[0002] After the electric desalting tank desalts and dehydrates the crude oil, the sludge will deposit in the lower part of the water layer at the bottom of the electric desalting tank, and it will accumulate more and more. The insoluble sludge will deposit at the bottom of the electric desalting tank, gradually reducing the volume of the electric desalting tank It affects the normal operation of the electric desalination tank, and also affects the desalination effect. The continuous backwashing operation is not effective in eliminating sludge deposits. Refining, the existing electric desalination tank device cleans its interior by spraying high-pressure water through perforated pipe holes or nozzles. However, this cleaning method consumes a lot of water and increases the follow-up sewage treatment project, which is not convenient for the extraction of crude oil in sewage. In addition, the power of the high-pressure pump required is large, and the power consumption is large. The backwash system on the existing electric desalination tank device increases the flushing range by adding nozzles, but this method will cause the impact force of the water flow to disperse, resulting in poor cleaning effect. Difference

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