Coked wax oil purification device and method

Abstract

The invention relates to a coked wax oil purification device and method. The coked wax oil purification device comprises a storage tank, a feed pump, a ceramic disk membrane filter, a product storage tank and a cleaning tank, wherein the storage tank and ceramic disk membrane filter are connected together through a pipeline; the pipeline between the storage tank and ceramic disk membrane filter is provided with the feed pump; and the upper end of the ceramic disk membrane filter is connected with the product storage tank through a pipeline. The method comprises the following steps: (1) sending coked wax oil containing coke powder into the storage tank; (2) delivering the solution in the storage tank into the ceramic disk membrane filter through the feed pump, setting the temperature in the ceramic disk membrane filter at 80-300 DEG C and the pressure at 0.05-0.5 MPa, and carrying out intermitted or continuous filtration to separate the coke powder and coked wax oil; (3) regularly discharging the coked wax oil containing coke powder obtained in the step (2) or returning to the storage tank for further filtration; and delivering the purified coked wax oil obtained in the step (2) to the product storage tank to enter the subsequent technique.

Description

technical field [0001] The invention belongs to the technical field of energy saving and environmental protection, and in particular relates to a device and method for purifying coking wax oil. Background technique [0002] With the continuous deepening of the utilization of crude oil resources and the continuous growth of the market demand for light oil products, the raw materials of catalytic cracking are becoming heavy and diversified, and the use of catalytic cracking units to process coking oil has become the source of raw materials for refineries An important way to tap potential and increase efficiency. Coker oil products, including coker gasoline (coker diesel oil and coker gas oil), usually carry coke powder to varying degrees—especially coker diesel oil and coker gas oil, and the coke powder carrying conditions of coking units in various domestic factories are also different. The coke powder enters the subsequent hydrogenation unit and deposits on the surface of t...

AI Technical Summary

Problems solved by technology

The coke powder enters the subsequent hydrogenation unit and deposits on the surface of the catalyst, which increases the pressure drop of the catalyst bed and bridges the catalyst bed (bias flow and other phenomena, which eventually lead to catalyst deactivation). When the coke powder enters the high-pressure heat exchanger, It is easy to foul and block the high-pressure heat exchanger, affecting the heat exchange effect. In severe cases, it must be shut down for cleaning, thereby shortening the start-up period of the entire device

[0003] At present, the method of removing coke powder from coking wax oil is mainly to use automatic backwash filter filter, which is often automatically shut down due to excessive pressure difference. In addition, the purchase cost of the device is high, the maintenance cost is high, and the overall use effect is not ideal

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