Pneumatic transmission and blast furnace injection technology and system for removing dust of coke oven

Abstract

The invention discloses a pneumatic transmission and blast furnace injection technology and system for removing dust of a coke oven. The technology comprises the following specific steps of: (1) maintaining air pressure balance between a dust-removing storage bin and a dust conveying bin pump; (2) feeding the dust removed in the coke oven into the dust conveying bin pump; (3) feeding compressed air into the dust conveying bin pump and mixing the compressed air with dust gas; (4) conveying the dust removed in the coke oven into the dust-removing bin of the coke oven; (5) mixing the dust removed in the coke oven with washed coal, and sending the mixture into a mixture bin; (6) feeding the mixture of the mixture bin into a medium speed coal mill for finely grinding; (7) collecting the finely ground material by a cloth bag powder collector, and then sending the collected material into a mixture powder bin; and (8) feeding the power in the mixture powder bin into a coal injecting tank, and then jetting the powder into a related unit of a blast furnace by virtue of nitrogen. The technology is carried out in a closed system, so that the dust removed in the coke oven can be conveyed within a long distance without pollution. Meanwhile, the dust removed in the coke oven is provided for a blast furnace pulverized coal injection system, thus being effectively utilized.

Description

technical field [0001] The invention relates to the technical fields of pneumatic conveying of coke oven dust removal and blast furnace injection. Background technique [0002] With the control of dust emission in the coke oven production process and the popularization and application of dry quenching technology, the coking industry can collect a large amount of coke oven dust every day. The main component of these coke oven dust is coke powder, and the carbon content is all More than 85%, how to do a good job in the environmental protection transportation and effective comprehensive utilization of coke oven dust removal is a subject worth studying. [0003] At present, the treatment method of domestic coke oven dedusting ash is to transport it to the sintering stockyard by tank truck after humidification, and use it in the sintering process. This method has the following problems: 1. The process of vehicle loading and unloading and transportation is easy to raise dust and ...

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Problems solved by technology

This method has the following problems: 1. The process of vehicle loading and unloading and transportation is easy to raise dust and scatter, especially when the sinter tank is unloading, the dust is difficult to capture, causing serious secondary pollution; 2. Sintering has certain requirements for the particle size of the fuel. If the particle size of the fuel is too small, it will affect the air permeability of the sintered material layer. Because most of the coke powder in the coking dust removal ash has a particle size less than 1mm, and these fine coke powders make the air permeability of the sintered material layer worse and affect the sintering quality. Therefore, coking dust is not completely suitable as a fuel for sintering

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