Multi-stage preheating system for cement predecomposition kiln

By introducing a multi-stage preheating system into the cement precalciner, multi-stage gradient heat exchange and automatic impurity removal of high-temperature flue gas are achieved, solving the problem of insufficient waste heat utilization in traditional equipment and improving waste heat recovery efficiency and system stability.

CN122408464APending Publication Date: 2026-07-17JILIN JINYU JIDONG EP TECH CO LTD
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Patent Information

Application Number
CN202610834425.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-10
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional cement precalciner kilns lack multi-stage gradient heat exchange structures, which makes it difficult to fully utilize the waste heat of high-temperature flue gas, resulting in significant heat loss.

Method used

A multi-stage preheating system is adopted, including a multi-stage heat exchange mechanism and a self-filtration and cleaning mechanism. Through the coordinated operation of multi-stage heat exchange and self-filtration and cleaning, multi-stage gradient heat exchange between materials and high-temperature flue gas is achieved. Components such as rotating discs and scrapers are set up to automatically clean impurities and avoid clogging of the filter structure.

Benefits of technology

It improves waste heat recovery efficiency, reduces heat loss, ensures clean high-temperature flue gas, reduces manual maintenance costs, and enhances system operation stability and energy-saving effect.

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Abstract

The invention discloses a multi-stage preheating system for a cement pre-decomposition kiln, the multi-stage preheating system comprises a base and a storage barrel, the storage barrel is fixedly arranged at the top of the base through a support, and the invention relates to the technical field of decomposition kiln preheating. According to the multi-stage preheating system for the cement pre-decomposition kiln, by arranging the multi-stage heat exchange mechanism and the self-filtering cleaning mechanism, the device can be promoted to conduct multi-stage gradient preheating on materials through cooperation of the multi-stage heat exchange mechanism and the self-filtering cleaning mechanism, high-temperature flue gas heat of the decomposition kiln is fully utilized, heat loss is reduced, and energy conservation and emission reduction are achieved. And meanwhile, impurities in high-temperature flue gas of the decomposition kiln can be filtered through the self-filtering cleaning mechanism, cleanliness of the high-temperature flue gas is guaranteed, the filtering face on the surface of the conical filtering net frame is synchronously cleaned in real time, smooth filtering of the high-temperature flue gas is guaranteed, and the situation that the filtering structure is blocked and influences system operation is avoided.
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