Co-gasification method of coking dust removal ash mixed with coal

Abstract

A method for co-gasification of coking dedusting ash mixed with coal belongs to the technical field of coal gasification. The steps are as follows: 1) the coal sample and coking dedusting ash are subjected to ash content, volatile matter, ash chemical composition, ash melting temperature and CO 2 Determination of gasification reactivity; 2) According to the ash content, volatile matter, ash chemical composition, ash melting temperature and CO 2 Gasification reactivity index R 0.5 , mix the coal sample and coking dust in proportion to obtain a mixed coal sample; 3) send the mixed coal sample into the gasifier for gasification. The co-gasification of coal gasification with coking dust removal ash can not only increase the output of effective gas, but also significantly reduce the cost of raw materials, thereby improving the economic benefits of coal gasification enterprises. The company solved the problem that a large amount of coking dust could not be handled.

Description

technical field [0001] The invention belongs to the technical field of coal gasification, and in particular relates to a co-gasification method of coking dust and dust mixed with coal. Background technique [0002] Coking plants will produce a large amount of dust removal ash in the traditional coal charging and coke pushing process, especially in recent years, with the application of CDQ technology, the output of dust removal ash in coking plants is increasing day by day. According to statistics, the output of coking dust removal ash Accounting for about 4% of the total output of coke, the accumulation of a large amount of dust not only causes waste of resources, but also pollutes the environment. The test and analysis show that coking dust has the characteristics of high fixed carbon content, low volatile matter and high content of alkaline components. Therefore, most existing enterprises mix coking dust back into coking, or replace part of anthracite with dust as a The b...

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Problems solved by technology

[0003] However, in the actual production process, in order to ensure continuous and stable production, the proportion of coking dust ash mixed with coking coal should not exceed 20% of the coal sample used for coking. The proportion is less (≤5%), which makes the large amount of coking dust generated in the coking plant unable to be completely reused, and the coking dust generated in some coking plants is accumulated in the factory area, and the granular dust generated seriously affects the health of the staff

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