Tar residue treatment method

Abstract

The invention belongs to the field of chemical engineering, and discloses a tar residue treatment method which comprises the following steps: 1, heating tar residues by adopting a preheater to obtainheated tar residues; 2, adding water into the heated tar residues through a dilution tank for dilution to prepare diluted tar residues; 3, centrifuging the diluted tar residue by adopting a centrifugal machine to obtain liquid and solid; 4, feeding the liquid into a clarification tank for clarification to obtain water and tar; 5, feeding the solid into a carbonization pyrolyzing furnace for pyrolyzing to obtain tar and coke particles; and cooling the tar by adopting a condenser to obtain cooled tar. The tar residue treatment method is simple, easy to operate and implement and low in cost, therecovery rate of the tar component in the tar residue reaches 90% or above, and the purposes of resource utilization, reduction and harmless treatment of the tar residue are truly achieved; meanwhile,coke particles separated from the tar residues are fed into a powder warehouse to be treated as fuel, so that the resource utilization rate is further increased.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a tar residue treatment method. Background technique [0002] The tar residue mainly comes from the deposits in the coal tar tank produced by the coking plant. During the coking production process, after the raw coal gas escaping from the coke oven is cooled in the gas collector and primary cooler, high-boiling organic compounds condense to form coal tar; at the same time, coal powder, semi-coke, graphite and The ash is also mixed in the coal tar, forming agglomerates of different sizes, and these agglomerates are tar residues. The fixed carbon content in the tar residue is about 60%, the volatile matter content is about 33%, and the ash content is about 4%. The porosity of the tar residue is about 63%, and the true density is 1.27-1.30t / m; its main components There are coal powder, coke powder and heavy tar and other substances. [0003] Tar residue is a hazardous solid waste...

AI Technical Summary

Problems solved by technology

The production cost of the third method is too high, and the temperature must reach 600-900 degrees

During the heating process, ammonia, benzene, phenols, naphthalene and other toxic substances are easy to volatilize and escape, polluting the environment, and severely corroding the briquette equipment and environmental protection equipment

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