Multi-direction pre-mixer for coal based needle coke pretreatment process and pre-mixing method

Abstract

The invention belongs to the technical field of producing high-quality needle coke from refined pitch prepared through continuous coal tar pitch extraction and sedimentation and in particular relatesto a multi-direction pre-mixer for a coal based needle coke pretreatment process and a pre-mixing method. The multi-direction pre-mixer is characterized by comprising a mixer shell, a swirler, an outlet F, a main raw material inlet A, impeller type disperser inlets B, C and D, a measuring hole E and a grid type screening plate, wherein the swirler is arranged at the top of the mixer shell; the outlet F is formed in the bottom of the mixer shell; the main raw material inlet A is formed in the top of the swirler; the impeller type disperser inlets B, C and D are uniformly formed along the circumferential side wall of the mixer shell; the measuring hole E is formed in the lower part of the mixer shell; the grid type screening plate is arranged inside the mixer shell; the mixer shell is a combined part of which the upper part is a cone, the middle part is a column and the lower part is a cone; the swirler penetrates into the column at the middle part of the mixer shell from the cone at theupper part of the mixer shell; and the measuring hole E is formed in the cone at the lower part. The multi-direction pre-mixer is simple in structure, convenient to operate, small in floor space, lowin power consumption and capable of achieving real-time on-line solvent proportion adjustment.

Description

technical field [0001] The invention belongs to the technical field of continuous quenching and sedimentation of coal tar pitch to prepare refined pitch to produce high-quality needle coke, and in particular relates to a multidirectional premixer and a premixing method for a coal series needle coke pretreatment process. Background technique [0002] Needle coke has a metallic luster and a strip-shaped structure that looks needle-shaped to the naked eye, hence the name needle coke. The needle coke produced from coal tar pitch is coal-based needle coke, and the needle coke produced from petroleum heavy components is oil-based needle coke. They have the same purpose and have good orientation and conductivity. It is mainly the main raw material for the manufacture of ultra-high power electrodes for refining steel. At present, needle coke is also widely used in the field of lithium batteries. With the characteristics of high specific capacity and long service life, it is one of...

AI Technical Summary

Problems solved by technology

[0004] The problems of the above process are: the device occupies a large area, requires a lot of investment, high power consumption, high cost, and many people, and it is difficult to realize intelligent control.

More importantly, when the molecular weight of the soft asphalt raw material changes, the feed rate of the settling tank should be reduced to the lowest point, and the solvent ratio in the solvent mixing tank should be readjusted, and the system will re-establish a balance to produce qualified light phase oil , a cycle takes more than 10 hours or even longer, and the solvent ratio cannot be adjusted online in time

This will bring great difficulties to the system material balance and target product quality, the process is complicated and difficult to control

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