An automatic sand washing device

Abstract

The invention relates to an automatic sand flushing device, which includes an automatic sand removal plate, a plurality of back flush water pipe sets, a back flush inlet pipe, switch valves, a plurality of spray nozzles, an ultrasonic mud-water interface instrument and an automatic control system. The automatic sand removal plate is fixedly disposed at the bottom of an electrical desalting tank inner wall, the plurality of back flush water pipe sets are disposed in the electrical desalting tank and positioned above the automatic sand removal plate, each back flush water pipe set comprises a plurality of back flush water pipes, and the spray nozzles are all arranged on the back flush water pipes. The back flush inlet pipe is communicated with the back flush water pipes, and the switch valves are arranged in the back flush inlet pipe. The ultrasonic mud-water interface instrument is disposed at the bottom of the electrical desalting tank to detect the thickness of silt deposited in the electrical desalting tank. Also, both the ultrasonic mud-water interface instrument and the switch valves are in signal connection with the automatic control system. When the ultrasonic mud-water interface instrument detects that the electrical desalting tank bottom silt exceeds a threshold thickness, the automatic control system opens the switch valves so as to flush the silt at the electrical desalting tank bottom.

Description

technical field [0001] The invention relates to the field of electric desalination tanks, in particular to an automatic sand washing device. Background technique [0002] Crude oil contains a lot of sediment and mechanical impurities, which will settle to the bottom of the electric desalting tank during the desalination and dehydration process of crude oil, and gradually form higher accumulations. In severe cases, they can accumulate in the manhole of the electric desalting tank. Due to the massive accumulation of sediment and mechanical impurities, it occupies the effective space of the salty sewage at the bottom of the electric desalination tank, which reduces the residence time of the salty sewage in the electric desalination tank, so that the crude oil contained in the salty sewage cannot be fully recovered. Over time, it floats to the upper oil layer of the electric desalting tank, thus causing more crude oil in the saline sewage discharged from the electric desalting t...

AI Technical Summary

Problems solved by technology

As a result, the normal operation of the electric desalination equipment is affected, the residence time of salty sewage in the electric desalination tank is reduced, and the salty sewage discharged outside the electric desalination tank contains more crude oil, wasting precious crude oil resources and polluting the surroundings

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