Waste heat gradient utilization device based on efficient heat exchange of garbage power generation

By designing a waste heat cascade utilization device and adopting multi-stage spray purification and anti-corrosion materials, the problems of low waste heat recovery efficiency and equipment corrosion have been solved, achieving efficient waste heat recovery and equipment protection.

CN224215342UActive Publication Date: 2026-05-08SHANDONG QINGDAHUIZHONG CLEAN ENERGY TECH CO LTD
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Patent Information

Application Number
CN202520659174.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-04-09
Publication Date
2026-05-08
Estimated Expiration
2035-04-09

AI Technical Summary

Technical Problem

In existing waste-to-energy processes, waste heat recovery efficiency is low, and heat is emitted with exhaust gas, resulting in energy waste. Furthermore, the flue gas corrodes and damages equipment, affecting the lifespan of the equipment.

Method used

A waste heat recovery system based on waste-to-energy was designed, including components such as a boiler, fan, desulfurization tower, dust collector, waste heat recovery unit and heat exchanger. It adopts water film direct contact heat exchange, purifies flue gas through multi-stage spraying, uses anti-corrosion materials to ensure stable system operation, and cuts out the system plug during the non-heating season for regular maintenance by adding alkaline solution.

Benefits of technology

It improves waste heat recovery efficiency, reduces chloride ion content in flue gas, extends equipment life, and ensures safe and stable system operation.

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Abstract

The waste heat gradient utilization device comprises a boiler, a first draught fan, a second draught fan, a desulfurizing tower, a dust remover and a waste heat recovery unit, the first draught fan is connected to the upper portion of one side of the boiler, the second draught fan is fixedly connected to the lower portion of one side of the boiler, the waste heat recovery unit is connected to one side of the dust remover, and the desulfurizing tower is fixedly connected to the lower portion of the other side of the boiler. A chimney is fixed on one side of the waste heat recovery unit, the waste heat recovery unit is divided into three stages of spraying, the first stage is a flue gas purification spraying section and is mainly used for removing HCL in flue gas, a water diversion demisting device is arranged at the upper end of the first stage, and first-stage spraying water is independently provided with a circulating pump for circulation and is not mixed with second-stage spraying water and third-stage spraying water. The flue gas purification device has the advantages that water film type direct contact heat exchange is adopted, the heat exchange efficiency is high, heat exchange is stable, after flue gas is subjected to first-stage spraying purification, water-soluble HCL in the flue gas is basically removed, clean flue gas enters the second-stage spraying layer and the third-stage spraying layer through the gas rising pipe, second-stage spraying water and third-stage spraying water make contact with the clean flue gas, and the water quality is good.
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