Blast furnace fly ash batching and returning system

Abstract

The invention relates to the technical field of blast furnace by-product returning, in particular to a blast furnace fly ash batching and returning system which comprises a main body. A power box is mounted on one side of the main body, a separation mechanism is arranged in the main body, an air distribution mechanism is mounted in the bottom end of the main body, a one-way mechanism and a brake mechanism are arranged on the power box, the one-way mechanism is communicated with the air distribution mechanism, the brake mechanism drives the one-way mechanism, and a refining mechanism is erected on the separation mechanism. Through the separation mechanism and the refining mechanism, coked dust can be refined and crushed conveniently; the air distribution mechanism can better enable dust particles to flow in the separation mechanism conveniently; the separation mechanism is assisted in better achieving a sorting effect, so that the vulcanization circulation effect in a blast furnace is improved; and through the arrangement of the brake mechanism and the one-way mechanism, blast furnace material returning air can be continuously conveyed into the main body conveniently, and conveying of the material returning air into the main body is not influenced mutually, so that the failure rate during conveying is reduced.

Description

technical field [0001] The invention relates to the technical field of blast furnace by-product return materials, in particular to a system for batching and return of blast furnace dust removal ash. Background technique [0002] The return system is one of the main components of the circulating fluidized bed. The ash and burning coal particles carried by the flue gas enter the separator through the furnace, and most of the solid particles are separated in the separator, and return to the furnace through the feeder, while the flue gas enters through the upper part of the separator. Tail heating surface. Generally, the circulation ratio of circulating fluidized bed blast furnace is 5-20, and the return ash which is more than ten times the coal feed amount needs to be returned to the combustion chamber through the return feeder to be burned again. At the same time, the circulation ratio is also adjusted by the return feeder. Therefore, the feeder is an important part related ...

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Problems solved by technology

[0003]However, in order to save procurement costs, the existing return system generally adopts one power source to configure the air source. When the power fails unexpectedly, the shutdown of the furnace will affect the Blast furnace combustion causes superheated air and load, which not only greatly damages the circulating vulcanization boiler, but also is not conducive to the fine separation of dust removal, reducing production efficiency, and there are not many traditional return devices without fine-tuned coking dust particles. If the components are degraded, it is easy to cause coking dust particles to accumulate in the device, causing damage to the device and making it unusable

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