Modification quality upgrading system of brown coal

Abstract

The invention relates to a modification quality upgrading system of brown coal, which belongs to a brown coal quality upgrading apparatus, and solves the problem that current modification quality upgrading system removes pollutants such as sulfur and mercury with low efficiency, and generated contamination gas and dust are failed to obtain effective treatment. The modification quality upgrading system also solves the problem of ineffective utilization of boiler tail gas. The modification quality upgrading system comprises an original coal bunker, a feeding apparatus, a fluidization pyrolysis apparatus, a constant flow pump, a vertical pipeline, a first-grade quality upgrading coal bunker, a horizontal pipeline, a cyclone separator, a secondary-grade coal bunker, a gas purifying apparatus and an induced draught fan. According to the invention, brown coal in the original coal bunker is predried through flue gas, and is sent to the fluidization pyrolysis apparatus through the feeding apparatus for pyrolysis quality upgrading, the coal after quality upgrading can be separated and collected through two-grade quality upgrading coal bunkers and the cyclone separator, the pyrolysis flue gas flows through the gas purifying apparatus and is introduced in the original coal bunker as a heat source for predrying and dehydrating of raw coal. The modification quality upgrading system of brown coal has the advantages of high reliability and strong coal adaptability, enhance the quality of the quality upgraded coal, and increase the cooperation removal efficiency of the pollutants such as sulfur and mercury.

Description

technical field [0001] The invention belongs to a lignite upgrading device, in particular to a lignite modification and upgrading system, which is used for efficient, clean and low-pollution utilization of lignite. Background technique [0002] Coal is the main fossil energy available in my country. With the rapid development of the economy, high-quality coal resources are becoming less and less, and the utilization of lignite resources with a low degree of coalification, which accounts for 13% of my country's total coal reserves, has been paid more and more attention. However, the moisture content of lignite is as high as 20-60%, and the volatile content is high. , easily weathered and incinerated, not conducive to long-distance transportation, and the efficiency of direct use is low; in addition, my country's lignite resources are mainly distributed in eastern Inner Mongolia and Yunnan, while coal resources in economically developed coastal areas are relatively scarce, and ...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a lignite modification and upgrading system, which solves the low efficiency of removing pollutants such as sulfur and mercury in lignite existing in the lignite modification and upgrading system, and the polluting gas generated during the lignite upgrading process. and dust can not be effectively treated, and at the same time solve the problem that the heat of boiler exhaust gas cannot be effectively used, so as to realize the high-efficiency and low-pollution development and utilization of lignite resources

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