Boiler flue gas waste heat recovery device

Abstract

The invention discloses a boiler flue gas waste heat recovery device, which comprises a flue gas inlet, flue gas circulation pipelines, a water receiver and a flue gas outlet, wherein the flue gas inlet is arranged at one end of the water receiver; the flue gas outlet is arranged at the other end of the water receiver; and at least two flue gas circulation pipelines are arranged in the water receiver and are arrayed in parallel. The boiler flue gas waste heat recovery device disclosed by the invention has the advantages that through arranging the at least two flue gas circulation pipelines which are arrayed in parallel in the water receiver, multiple flues are provided for flue gas, the heat exchange area of the flue gas is increased, the air exhaust flow velocity of the flues is quickened, and water in the water receiver is rapidly heated so as to rapidly reach a needed temperature.

Description

technical field [0001] The invention relates to a waste heat recovery device, in particular to a boiler flue gas waste heat recovery device. Background technique [0002] Boiler flue gas contains a lot of heat. If it is discharged directly into the air through the chimney, not only the waste heat contained in the flue gas will be wasted, but the coal ash contained in the flue gas will also pollute the surrounding environment. Existing flue gas waste heat recovery devices usually use a single serpentine pipe as the flue, but the heat exchange area of ​​the single pipe flue is small, and the wind resistance of the curved serpentine pipe is large, the exhaust effect is poor, and the effect of flue gas waste heat recovery and utilization Difference. Contents of the invention [0003] The technical problem to be solved by the present invention is that, aiming at the deficiency of the existing boiler flue gas waste heat recovery device, a boiler flue gas waste heat recovery dev...

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Problems solved by technology

[0002] Boiler flue gas contains a lot of heat. If it is discharged directly into the air through the chimney, not only the waste heat contained in the flue gas will be wasted, but the coal ash contained in the flue gas will also pollute the surrounding environment.

Existing flue gas waste heat recovery devices usually use a single serpentine pipe as the flue, but the heat exchange area of ​​the single pipe flue is small, and the wind resistance of the curved serpentine pipe is large, the exhaust effect is poor, and the effect of flue gas waste heat recovery and utilization Difference

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