An energy-saving and environmentally friendly air preheating device for coal-fired boilers

By designing an air preheating device that includes gas flow components and a waste residue heat recovery mechanism, the problem of unrecovered heat from high-temperature dust and waste residue in existing technologies has been solved, achieving efficient heat recovery and simplified operation procedures.

CN115597082BActive Publication Date: 2026-05-26JILIN TONGXIN THERMAL POWER GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JILIN TONGXIN THERMAL POWER GRP CO LTD
Filing Date
2022-10-24
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing boiler air preheating equipment fails to effectively recover the heat from high-temperature dust and slag when utilizing the waste heat of flue gas at the boiler tail, resulting in energy waste and cumbersome operation.

Method used

An air preheating device was designed, comprising a gas flow component, a waste residue blocking mechanism, and a waste residue waste heat utilization mechanism. The device filters high-temperature waste residue through a screen and utilizes the waste residue waste heat to preheat the air. Combined with a vibration and cleaning mechanism, it ensures efficient filtration and heat recovery.

Benefits of technology

It has achieved effective recovery and utilization of heat from high-temperature dust and waste residue, improved the utilization rate of flue gas heat energy, simplified the operation process, and reduced energy waste.

✦ Generated by Eureka AI based on patent content.

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Abstract

An energy-saving and environmentally friendly air preheating device for coal-fired boilers is disclosed. The device includes a base plate, preheating pipes, baffle blocks, and gas flow components. The preheating pipes are connected to the top of the base plate, and the gas flow components are mounted on the preheating pipes. A baffle block is rotatably connected to the lower left side of the preheating pipes. The device also includes manifolds, baffles, and flue gas guide plates. Baffles are connected to both the upper and lower sides of the preheating pipes, and manifolds are evenly spaced and densely distributed between the baffles. Flue gas guide plates are slidably connected between the upper and lower sides of multiple manifolds. This invention, when using boiler flue gas after combustion to heat air, can filter out the waste residue from the hot flue gas and use the heat from the waste residue to heat the air, increasing the utilization rate of flue gas thermal energy.
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