Raw coal gas purification circulating device and method

Abstract

The invention discloses a raw coal gas purification circulating device and method. The raw coal gas purification circulating device comprises a sediment tank 1, a tar ammonia water collection tank 2, a horizontal water-tube cooler 3, a coal gas water seal tank 4, an electrostatic tar catcher 5, an ammonia water circulating pump 6 and a coal gas fan 7, wherein one end of the coal gas water seal tank 4 communicates with a low-temperature retort furnace through a pipeline, and the other end communicates with the horizontal water-tube cooler 3 through a pipeline; the coal gas water seal tank 4 also communicates with the sediment tank 1 through a pipeline; the sediment tank 1 communicates with the tar ammonia water collection tank 2 through a pipeline; the tar ammonia water collection tank 2 communicates with the ammonia water circulating pump 6 through a pipeline; and the ammonia water circulating pump 6 communicates with a pipeline between the low-temperature retort furnace and the coal gas water seal tank 4. The device can collect and reutilize tar and coal gas generated in the retort process. Compared with the traditional industries, the device disclosed by the invention is environment-friendly and enhances the raw material utilization ratio.

Description

Technical field [0001] The invention relates to the field of raw gas purification, in particular to a raw gas purification cycle device and method. Background technique [0002] Northern Shaanxi has rich coal resources, short coal seams, low coalification degree, high volatile matter, low ignition point and high tar yield. It is a high-quality raw material for low-temperature dry distillation. After years of development, the low-temperature coal retort industry has become a major pillar industry of the local economy, with a production capacity of 0.18 to 20 million tons per year. As an emerging industry, there are still a lot of process technology issues that need to be resolved. Proceeding from the overall situation of sustainable economic and social development, actively carry out the comprehensive utilization of resources in the dry distillation process, develop new clean coking processes, and form new clean coking production technologies and complete sets of equipment suitab...

AI Technical Summary

Problems solved by technology

[0003] However, most of the raw gas produced by the current low-temperature carbonization furnace is discharged directly or after being filtered. However, the tar in the raw gas cannot be collected, which not only causes air pollution, but also wastes energy.

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