Coal-fired power plant and low-rank coal upgrading integrated system and comprehensive utilization of upgraded product

Abstract

The invention discloses a coal-fired power plant and low-rank coal upgrading integrated system and comprehensive utilization of an upgraded product, and belongs to the technical field of upgrading conversion and comprehensive utilization of low-rank coal resources. The system comprises pre-drying equipment, a pyrolyzer, a coal / semi-coke cooler and auxiliary equipment. After being dried by pre-drying equipment, a part of low-rank coal enters a boiler for burning, and the rest enters the pyrolyzer; the coal chemically reacts with flue gas, air and water vapor in the pyrolyzer, and the generated blended fuel is fed into a furnace chamber for burning; upgraded coal is cooled through the coal / semi-coke cooler and then fed into a coal / semi-coke bin for storing. The system has the advantages as follows: the low-rank coal is upgraded, converted and comprehensively used while generating loads of a coal-fired power plant are met, so that coal / semi-coke, which is high in energy grade, and low in activity, and can be safely transported at a long distance, is obtained, and has an extremely high practical value, and the technical difficulties that the low-rank coal is easy to spontaneously combust and high in moisture are solved.

Description

technical field [0001] The invention belongs to the technical field of upgrading, transformation and comprehensive utilization of low-rank coal resources, and in particular relates to an integrated system for upgrading a coal-fired power station and low-rank coal and comprehensive utilization of upgrading products. Background technique [0002] Rich in coal resources, my country is the world's largest coal producer and consumer, and one of the few countries in the world that uses coal as its primary energy source. Among them, low-rank coal accounts for more than 50% of my country's total coal resources, and most of my country's low-rank coal resources are distributed in sparsely populated areas in the west and north of my country, far from the industrially developed areas in the southeast coast. Low-rank coal refers to coal with a relatively low degree of coalification (generally dry ash-free base volatile content >20%). The salient features of low-rank coal are high moi...

AI Technical Summary

Problems solved by technology

Accordingly, this patent proposes a low-rank coal upgrading system integrated with a coal-fired power station, which can improve the utilization rate of coal resources from the perspective of overall utilization efficiency, and can produce high-energy grade, low-activity coal that can be transported safely over long distances. Coal / semi-coke, which solves technical problems such as low-rank coal is easy to spontaneously ignite and has high moisture content

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