Dry distillation and quenching system of lignite powder and process

Abstract

The invention provides a dry distillation and quenching system of lignite powder. The system comprises an external heating top coal charging lignite dry distillation furnace and an indirect cooling quenching tower, wherein the dry distillation furnace comprises a plurality of alternating dry distillation chambers and combustion chambers; stockers are arranged at the tops of the dry distillation chambers; bottoms of the dry distillation chambers are slopes; the slant angles of the slopes are larger than the accumulation angle of coke powder; coke outlets and quantitative coke discharge mechanisms are arranged at the bottom ends of the slopes; and the coke powder from the coke outlets of the lignite dry distillation furnace is transported to a coke powder cooling pipe, the coke powder in the coke powder cooling pipe is cooled by cooling water and then the cooled coke powder is discharged out of the quenching tower via a spiral discharge machine. The system has the advantages that the system uses the lignite powder as the raw material and is large in production capacity; and gas and tar can be produced selectively besides the coke powder, or the products are selectively combusted in the combustion chambers and flues of the dry distillation furnace fully and then the heat of the products is utilized to generate power.

Description

technical field [0001] The invention relates to a dry distillation and coke quenching system and process of lignite coal powder. Background technique [0002] In the existing lignite carbonization pyrolysis technology, whether the heating method is internal heating or external heating, these technologies are not mature. At present, more internal heating blue-coal low-temperature (about 600°C) carbonization furnace equipment is used, and the annual output of a single furnace is Most of them are about 30,000 tons per year, and only coal blocks with a range of 25 to 50 mm can be used as raw materials, and a large amount of crushed coal and coal powder with a thickness of <25 mm cannot be effectively utilized. [0003] At present, the technology and process of large-scale coke oven equipment used to produce coke products have reached maturity. Its carbonization chamber and combustion chamber are separated by external heating for coal carbonization, and coal powder is used as ...

AI Technical Summary

Problems solved by technology

[0005] The above coke production process can only be intermittent, with an interval of 12-20 hours

[0006] However, due to the lack of caking components, lignite can only become loose high-temperature coke powder after high-temperature carbonization, and the high-temperature coke powder will cause explosion hazards through water shower cooling. methods are not suitable for lignite dry distillation

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