Oil-water separation device for oil-containing sewage

Abstract

The invention belongs to the technical field of separation of oil-containing sewage of petrochemical industry, in particular to an oil-water separation device for oil-containing sewage. According to the oil-water separation device for the oil-containing sewage, a PLC control system is electrically connected with a valve at a sewage inlet, a valve at a sewage outlet and a valve at a water outlet of each of a preheating tank, a heat exchanger and an oil-water separation and oil collecting device; an oil-containing sewage conveying main pipeline is communicated with the sewage inlets of the preheating tank, the heat exchanger and the oil-water separation and oil collecting device; the heat exchanger is internally provided with an oil-containing sewage conveying pipeline and is connected with the sewage inlet of the heat exchanger; the sewage outlet of the preheating tank is communicated with the sewage inlet of the oil-water separation and oil collecting device; the water outlet of the oil-water separation and oil collecting device is communicated with the oil-containing sewage conveying main pipeline; the oil-containing sewage conveying main pipeline is provided with a pump I which is electrically connected with the PLC control system. The oil-water separation device for the oil-containing sewage disclosed by the invention reduces the energy consumption of the oil-water separation device, improves the oil-water separation efficiency, and can be widely applied to the separation of the oil-containing sewage of the petrochemical industry.

Description

technical field [0001] The invention belongs to the technical field of separation of petrochemical oily sewage, and in particular relates to an oil-water separation device for oily sewage. Background technique [0002] The working principle of the oil-water separator is mainly to carry out gravity separation based on the density difference of oil and water. However, because the process only relies on the density difference, the gravity separation process takes a long time and requires a large settlement area. The oil-water separation interface is fuzzy and the oil-water separation accuracy is high. Difference. Heating and aeration are auxiliary separation processes for the characteristics of oily sewage, but in order to achieve a better treatment effect during the application process, a large amount of energy is often consumed. [0003] The conventional oil-water separation process uses fiber ball filter or fiber bundle filter and ceramic membrane filter, etc. When the oil ...

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Problems solved by technology

[0002] The working principle of the oil-water separator is mainly to carry out gravity separation based on the density difference of oil and water. However, because the process only relies on the density difference, the gravity separation process takes a long time and requires a large settlement area. The oil-water separation interface is blurred and the oil-water separation accuracy is high. Difference

Heating and aeration are auxiliary separation processes for the characteristics of oily sewage, but in the application process, in order to achieve a better treatment effect, a large amount of energy is often consumed

[0003] The conventional oil-water separation process adopts fiber ball filter, fiber bundle filter and ceramic membrane filter, etc., when the oil content in the sewage is high, and the oil is in a dispersed phase, the treatment efficiency is low and the effluent contains high sulfur.

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