Process and system thereof for forming upgraded lignite

Abstract

The invention relates to a process and a system thereof for forming upgraded lignite, solving the problems of inflammability, explosiveness, environment pollution, low forming rate, poor system stability, low safety performance and the like existing in the forming process of the upgraded lignite. The invention can save the construction cost, reduces the safety risk, decreases the coal dust pollution of a finished product conveying system and has the characteristics of safety, energy saving, environmental protection, high efficiency and stability. The method comprises the following steps of: (1) feeding the formed lignite which is subjected to drying and dehydration and upgrading treatment and meets the requirements for water content, the temperature and the granularity; (2) pressing the lignite into the molded lignite by using a molding device, screening the molded lignite and feeding the qualified molded lignite into next step and turning the unqualified molded lignite into the step (1); (3) air cooling the qualified molded lignite by adopting air with water fog, feeding the cooled molded lignite into a finished bin and feeding lignite powder / granules generated by cooling back tothe step (1); and (4) collecting waste gas generated by cooling, removing dust and emptying or recycling to other proper work sections and feeding the lignite power collected by a dust removing device into the step (1).

Description

technical field [0001] The invention relates to a technology and a system for forming upgraded lignite in industries such as electric power and coal. Background technique [0002] Due to its low calorific value, high water content, easy weathering and fragmentation, and easy spontaneous combustion, lignite has brought many difficulties to its combustion, transportation, and storage. After the lignite is dried and upgraded, it is made into a briquette with a certain particle size and compaction degree, which will make its performance better than that of the raw lignite coal in all aspects, and can effectively solve the problem that the lignite is easy to be weathered, broken, and spontaneously ignited during transportation and storage. question. Therefore, lignite drying and upgrading and molding technology has become one of the main research directions in lignite processing and application in recent years. The molding process of lignite is divided into a binder molding pro...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of flammability, explosion, environmental pollution, low molding rate, poor system stability and low safety performance in the molding process of upgraded lignite, as well as the shortcomings of the existing molding process, and provide a The process and system used for molding of upgraded lignite, which can save construction costs, reduce safety risks, and reduce coal dust pollution in the finished product conveying system. It has the advantages of safety, energy saving, environmental protection, high efficiency, and stability.

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