Boiler flue gas waste heat recovery and utilization system

By designing a boiler flue gas waste heat recovery and utilization system, using the heat transfer design of the first and second backhaul pipes, combined with a cyclone dust collector and waste heat recovery mechanism, the problem of the difficulty of effective utilization of flue gas heat and separation of dust particles in the prior art is solved, and efficient energy utilization and cleaning convenience is achieved.

CN120043129AInactive Publication Date: 2025-05-27SHANGHAI SHISHANG ENERGY TECH CO LTD
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Patent Information

Application Number
CN202510318531.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-18
Publication Date
2025-05-27
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing boiler flue gas waste heat recovery device cannot effectively use the heat in the flue gas to heat the sucked air and coal to mix and burn, resulting in increased fuel consumption and increased operating costs. At the same time, it is impossible to effectively store particulate matter in the flue gas, which increases the difficulty of cleaning.

Method used

A boiler flue gas waste heat recovery and utilization system is designed. Through the design of the first return pipe and the second return pipe, the heat of the flue gas is used to reheat the water in the boiler cylinder. Through the cyclone dust collector and the waste heat recovery mechanism, the separation of dust particles in the flue gas and the utilization of waste heat of the flue gas is achieved respectively, thereby improving combustion efficiency and cleaning convenience.

Benefits of technology

It improves the thermal efficiency of the boiler system, reduces energy waste and consumption, reduces operating costs, and improves combustion efficiency and cleaning convenience through effective dust particles separation and waste heat utilization.

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Abstract

The invention discloses a boiler flue gas waste heat recovery and utilization system which comprises a boiler barrel, one end of the boiler barrel is communicated with a front smoke box, the other end of the boiler barrel is communicated with a rear smoke box, one end of the front smoke box is fixedly provided with a combustor, a combustion opening of the combustor is communicated with a hearth, and the hearth is fixedly installed in the boiler barrel. A transition smoke box is installed at one end of the hearth in a communicating mode, a first return pipe is installed between the transition smoke box and the front smoke box in a communicating mode, and a second return pipe is installed between the front smoke box and the rear smoke box in a communicating mode, so that smoke enters the rear smoke box along the second return pipe and is exhausted from a first smoke exhaust pipe. And the second smoke exhaust pipe exhausts the smoke into the waste heat recovery mechanism. Through the design of the waste heat recovery mechanism, exhausted smoke is used for heating sucked air, high-temperature air is mixed with coal, more sufficient oxygen can be provided when the coal is combusted in the hearth, and the combustion reaction is more complete.
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