A hot blast stove coal powder injection device

By using high-temperature exhaust gas to preheat air and filter dust in the hot blast stove pulverized coal injection device, the problems of external air lowering the temperature of pulverized coal and mixing in dust are solved, achieving more efficient combustion and more stable operation.

CN224397827UActive Publication Date: 2026-06-23甘肃大地新能源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
甘肃大地新能源有限公司
Filing Date
2025-07-23
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing hot blast stove pulverized coal injection equipment reduces the temperature of pulverized coal and introduces dust when external air enters, affecting combustion efficiency and quality.

Method used

A jetting device including an air preheating pipe and a pulverized coal preheating pipe was designed. The device uses high-temperature exhaust gas to preheat the air and filters dust through a filter plate to ensure that the air and pulverized coal are preheated separately and then mixed before being sprayed out, thus avoiding temperature drop and dust contamination.

Benefits of technology

It improves combustion stability and efficiency, ensures the purity of pulverized coal, reduces heat loss, prevents dust accumulation and agglomeration in equipment, and simplifies the maintenance process.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a kind of hot blast furnace coal powder's injection device, it is related to coal powder injection technology field, including air preheating pipe and fixed on its upper surface coal powder preheating pipe, air preheating pipe one end is equipped with fixed sleeve, fixed sleeve side surface is embedded with filter plate, fixed sleeve inside is provided with fixed assembly, fixed sleeve is fixed in air preheating pipe one end by fixed assembly.The hot blast furnace coal powder's injection device passes through second fan and passes into air preheating pipe in high-temperature waste gas, and the air preheating pipe inside intake pipe is preheated, to preheat external air, avoid because temperature reduces and influence combustion reaction speed, to improve the stability and efficiency of combustion, and utilize waste gas as heat source, realize air preheating while reducing heat energy loss, improve overall thermal efficiency, mix and spray after preheating outside air and coal powder respectively, can avoid the combustion instability caused by preheating uneven or temperature difference too large.
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