Purification device and purification method for raw material for producing needle coke

Abstract

The invention discloses a purification device and purification method for raw materials for producing needle coke. The purification device comprises a gas pressure stabilizing tank, a dirty liquid tank and two filters, the two filters are connected in parallel and then are respectively connected with the gas pressure stabilizing tank and the dirty liquid tank. The filter comprises an upper seal head, a tube plate and a barrel which are sequentially connected from top to bottom, and a filter element and a heat tracing tube are arranged in the barrel. According to the purification device and thepurification method for the raw material for producing the needle coke, the back-blowing pressure of the filter is adjusted according to the pressure difference of the filter and the back-flushing frequency at the initial operation stage of the filter, so that steady-state filter cake is established. Meanwhile, the back-flushing pressure is adjusted in the middle stage of operation of the filterto ensure that permanent filter cake is established on the filter element. Therefore, particulate matters are prevented from entering pore passages 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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