Drying and dust-removing apparatus for forced air drying section of chain grate and drying and dust-removing technology

Abstract

The invention relates to the field of a forced air drying technology of a chain grate in a chain grate-rotary kiln pelletizing technology, in particular to a drying and dust-removing apparatus for the forced air drying section of the chain grate and a drying and dust-removing technology. The technology comprises the following steps: carrying out dust-removing treatment and compulsory air draft onwaste air in the forced air drying section by using a dust-removing fan and a dust remover; using a pipeline to connect the waste air in two auxiliary air boxes under a grate bed with a main waste air pipeline to completely draining the waste air in the auxiliary air boxes; using the pipeline to transmit the waste air in a dust-removing hood to the main waste air pipeline, thereby ensuring that asufficient negative pressure can completely drain the waste air in the dust-removing hood; and using the pipeline to introduce the hot air in the high temperature section of the chain grate into the dust-removing apparatus and the fan, wherein an electrically operated valve and a temperature measuring instrument are arranged on the pipeline, thereby ensuring that the waste air has enough temperature without forming dew. The invention has the advantages that the drying effect of the forced air drying section can be ensured, and a green-ball can not burst because of overlarge moisture when entering into a next link; the production environment in a workshop of the forced air drying section is improved; and the pollution of waste air discharge on the environment is reduced.

Description

technical field [0001] The invention relates to the technical field of a chain grate blast drying process in a chain grate machine-rotary kiln pelletizing process, in particular to a drying and dust removal equipment and a drying and dust removal process for a chain grate blast drying section. Background technique [0002] As a basic national policy, energy conservation and emission reduction will run through economic life for a long time and affect all walks of life. Chain grate machine-rotary kiln pelletizing process production line is designed with multiple dust collectors. These dust collectors not only remove dust from the process but also remove dust from the final exhaust gas. It can be said that the whole process has little impact on the environment. However, the chain grate machine drum The exhaust gas in the air drying section has been directly discharged. Considering that this part of the waste gas contains a lot of water, there is no suitable dust removal equipm...

AI Technical Summary

Problems solved by technology

Before the dust removal process was adopted in the blast drying section of the chain grate machine, there were the following problems: 1. Due to the insufficient height of the release chimney, it was impossible to provide enough negative pressure to directly extract all the exhaust gas from the upper cover of the blast drying section, which made part of the exhaust gas It is discharged into the workshop from the feed end of the chain grate machine or the bellows interface and the gap. This part of the exhaust gas has a great impact on the production environment of the workshop.

However, if there is no forced draft by the dust removal fan, sufficient negative pressure cannot be achieved only by the exhaustion of the chimney. The result is that a section of waste gas with a very high water content is gathered in the upper surface space of the raw balls. These waste gas and the chain grate machine The water content of the green balls on the grate bed forms a dynamic balance, that is, this part of the green balls is not only not dried, but may increase the water content of the green balls

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