Raw material purification device and purification method for producing needle coke

Abstract

The invention discloses a raw material purification device for producing needle coke and a purification method thereof, wherein the purification device includes a gas surge tank, a dirty liquid tank, and two filters; the two filters are connected in parallel and then They are respectively connected with the gas surge tank and the dirty liquid tank. The filter includes an upper head, a tube plate and a cylinder connected sequentially from top to bottom, and a filter element and a heat tracing pipe are arranged in the cylinder. The purifying device and purifying method for the raw materials used in the production of needle coke provided by the present invention, by adjusting the backflushing pressure of the filter according to the pressure difference of the filter and the times of backwashing at the initial stage of the filter operation, a steady state filter is established. cake. At the same time, the backflush pressure is adjusted in the middle of the filter operation to ensure that a permanent filter cake is established on the filter element. In this way, particles are prevented from entering the pores of the filter element, and the high efficiency of the purification system is ensured.

Description

technical field [0001] The invention relates to filtration technologies for residual oil, catalytic cracking oil slurry, coking wax oil, coal tar, etc., in particular to a purification device and a purification method for producing needle coke raw materials. Background technique [0002] Raw materials for producing needle coke such as residue oil, catalytic cracking oil slurry, coking wax oil, coal tar, and also raw materials for producing carbon black, carbon fiber materials and various chemical products. However, due to the large amount of solid particles remaining in it, its application as a high value-added product is severely limited, and its development and utilization value is greatly reduced. [0003] The raw materials for domestic production of needle coke contain a large amount of catalyst powder, colloid, asphaltene, etc., and the ash content is 3000-20000ppm. The ash content of raw materials for producing high-quality needle coke should be controlled below 100pp...

AI Technical Summary

Problems solved by technology

Each of the five methods has its own technical problems: Among them, the natural sedimentation method has simple equipment, low operating costs, and easy operation. However, due to low purification accuracy and low purification efficiency, this method has been gradually eliminated

At the same time, the problem with this method is that the filter is easy to block, and it is difficult to run for a long period of time.

The solid particles contained in the raw material accelerate the clogging of the filter element and greatly increase the pressure difference of the filter

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