Hazardous waste tar residue resource utilization method

Abstract

The invention discloses a hazardous waste tar residue resource utilization method, and belongs to the field of tar residue cyclic utilization. Tar residues are identified as hazardous wastes, and thehazardous waste tar residue resource utilization method comprises the following steps: 1, collection: collecting tar solid impurities deposited in tar by using existing tar residue separation equipment of a coking plant; 2, liquefaction: introducing a liquefying agent into the tar residue, and liquefying the tar residue by using a stirring paddle to achieve liquid flow characteristics; 3, grinding: feeding the tar residue with the liquid flow characteristics into a grinding pump for grinding by using a delivery pump, and adding water and a surfactant into the tar residue in the grinding process; and 4, pulping: strongly stirring the ground materials to obtain tar residue slurry. The tar residue slurry obtained by the method has stable, pumping and atomizing properties of liquid fuel, is convenient to load, unload, transport and store, and can be used for fuel combusted in a boiler or gasification raw materials of a gasification furnace. The method is low in cost, and the purpose of resource utilization of hazardous waste tar residues is achieved.

Description

technical field [0001] The invention relates to the field of tar residue recycling, in particular to a resource utilization method for hazardous waste tar residue. Background technique [0002] Tar residue is a viscous solid waste that absorbs a large amount of coal tar produced in the production process of coking enterprises. With the continuous expansion of coke production capacity, the amount of tar residue produced is also increasing year by year. The coking plant with a production capacity of 4.4 million tons per year can produce about 1900 tons of tar residue per year. [0003] The composition and complexity of tar residue are mainly composed of ammonia, phenol, naphthalene, polycyclic aromatic hydrocarbons, coal powder, coke powder and other substances. Some organic substances in tar residue are currently recognized as strong carcinogens. [0004] The tar residue is extremely viscous at room temperature, it is difficult to use it directly, and there is also a lack ...

AI Technical Summary

Problems solved by technology

Domestic coking plants usually mix it into coal and return it to coking, and blockage is easy to occur during the addition process, resulting in an imbalance of coal blending ratio and affecting coke output

At the same time, the on-site environment is harsh, and the generated gases such as ammonia, hydrogen cyanide, phenols, hydrogen sulfide, and benzopyrene may cause air pollution.

During the transportation process, because tar residue is mixed in tar and ammonia water and is in a semi-fluid state, bubbles, bubbles, drips, and leaks may occur from time to time, and there is a risk of causing environmental pollution.

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