Device and method for treating heavy coal tar in coal gas

Abstract

The invention relates to the technical field of coal tar treatment, in particular to a device and method for treating heavy coal tar in coal gas. The treatment device comprises a furnace body and further comprises a coal tar stabilizing assembly, a graded cooling assembly and a washer which are sequentially arranged, and the coal tar stabilizing assembly is provided with a carbonization adsorption area and a regeneration area; according to the invention, hot coal gas output by the gasification furnace is directly fed into the coal tar stabilizing assembly for reaction, and the heavy part of coal tar contained in the coal gas is subjected to organic matter molecule reforming, so that the problem of difficult coal gas cooling operation caused by high-viscosity organic matters in the coal tar is effectively solved; and according to the treatment method disclosed by the invention, the temperature of the fractions of the coal tar in the coal gas is reduced through carbonization adsorption, and the components with higher fractions are condensed in advance and separated from the gas by adopting graded cooling treatment, so that the treatment method is simple in process and wide in application range, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of coal tar treatment, in particular to a treatment device and method for heavy coal tar in gas. Background technique [0002] Fixed bed (also known as moving bed) gasifier is the oldest coal gasification equipment. It has the characteristics of mature technology, reliable equipment, flexible production and operation, and high thermal efficiency in the coal conversion process. However, when using a fixed bed gasifier, leaving the fixed bed The coal gas at the top of the bed gasification furnace contains coal tar produced by coal dry distillation. The temperature range of the coal tar fraction is very wide, and some heavy coal tar with high fraction points has a high viscosity. Difficult to deal with. [0003] The current pressurized fixed-bed gasifier adopts a gas scrubber (as a part of the gasifier) ​​at the gas outlet of the gasifier top to remove most of the dust and coal tar from the gas by washing with...

AI Technical Summary

Problems solved by technology

In this way, a large amount of gas water containing a large amount of oil and various organic substances is generated. After preliminary separation, light oil, phenolic water and heavy tar can be obtained. Emulsifying and dissolving various organic substances in water makes water treatment very difficult, while heavy Due to the poor quality of high-quality tar, especially after it is mixed with coal dust, it is difficult to discharge from the pressurized system. At the same time, this part of heavy oil is often treated as hazardous waste after leaving the gasifier, which increases storage and transportation costs. In addition, When using other coal conversion treatment equipment, such as pyrolysis furnace or coal conversion furnace, the gas discharged after treatment also has high-viscosity substances that are difficult to handle

[0004] Therefore, it is necessary to propose a new treatment device to better solve the difficult problem of coal tar treatment

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