Tar residue pre-separation and removal process and system in coke oven ammonia water system

Abstract

The invention discloses a tar residue pre-separation and removal process and a tar residue pre-separation and removal system in a coke oven ammonia water system. The system mainly comprises a tar residue pre-separator, an accommodating tank, a mechanical clarifying tank, a tar residue adding device and the like. The process comprises the following steps of: preliminarily separating a mixture of tar, ammonia water and tar residue through the tar residue pre-separator, introducing the tar / ammonia water mixed solution into the next process, inputting the tar residue and mixture of residual tar and ammonia water into the mechanical clarifying tank for performing gravity separation, discharging the obtained mixed solution into the accommodating tank, and inputting the solution into the tar residue pre-separator through a submerged pump and the like; and scraping the tar residue from the mechanical clarifying tank, and transferring the tar residue to the tar residue adding device for blending coal. The effect of pre-separating and removing tar residue in the ammonia water can be greatly improved, the tar residue is separated in the mechanical clarifying tank, the link of depositing the tar residue in an underground emptying tank can be saved, the field operating environment is greatly improved, and the labor intensity of a worker is reduced.

Description

technical field [0001] The invention particularly relates to a tar slag pre-separation and removal process and system applied in a coke oven ammonia water system. Background technique [0002] At present, the 7.63m coke ovens in iron and steel production enterprises generally adopt the PROVEN system with full negative pressure operation. When it is working, a large amount of coal powder and coke powder will enter the gas suction pipeline, and flow into the tar slag pre-separator together with ammonia water. For this kind of tar residue, the traditional process usually uses a combination of equipment such as a tar press pump, a thick filter, and an underground vent tank of the tar residue pre-separator to remove it (see figure 1 ), and then make ammonia etc. enter the subsequent process 100, but there are many defects in it, for example: [0003] (1) The tar press pumps (1-5, 1-6) are imported equipment, and the cost of a single unit is about 1 million yuan, which is expensi...

AI Technical Summary

Problems solved by technology

[0003] (1) The tar press pumps (1-5, 1-6) are imported equipment, and the cost of a single unit is about 1 million yuan, which is expensive and difficult to maintain;

[0004] (2) Although the tar slag crushing pump can crush tar slag, it is limited to small particles, and large particles of tar blocks cannot be processed and still need to be discharged;

Tar slag deposits in the underground tank, blocks the pipeline of the submerged pump, and eventually reduces the volume of the underground tank, which requires manual cleaning every month, which not only consumes a lot of manpower and material resources, but also greatly affects the on-site operating environment

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