A fire-tube waste heat boiler capable of improving the utilization rate of waste heat

Abstract

The invention discloses a fire tube type waste heat boiler capable of improving the utilization ratio of afterheat. A plurality of annular grooves are continuously formed in the side wall of an innercavity of a process gas inlet of the waste heat boiler, the distance between the multiple annular grooves and the outer wall of the process gas inlet is reduced in sequence in the direction of approaching heat exchange pipes, the flowing speed of high-temperature gas is reduced due to the grooves during gas entering, the flowing direction of part of the high-temperature gas is changed so that circulation flow can occur, meanwhile the friction action between the gas and the inner cavity of the process gas inlet is reduced, and gas entering of the high-temperature gas is smooth and uniform; andby mounting a heat storage chamber in a rear smoke box barrel, gas which is already subjected to heat exchange through the heat exchange pipes cannot directly flow out of a process gas outlet and canflow into an inner cavity of the heat storage chamber and then the afterheat of the gas is absorbed by a heat storage filler, then through a circulation water channel which communicates with a steam pocket, circulation water makes contact with the side wall of the inner cavity of the heat storage chamber and is subjected to heat exchange with the heat storage filler, absorbing and utilizing of theafterheat in the gas which is already subjected to heat exchange through the heat exchange pipes are achieved, and the utilization ratio of the afterheat of the fire tube type waste heat boiler is improved.

Description

technical field [0001] The invention relates to the field of waste heat boilers, in particular to a fire tube waste heat boiler capable of improving the utilization rate of waste heat. Background technique [0002] The waste heat boiler is a boiler that uses waste heat in the industrial production process to generate steam. It belongs to a heat exchanger that uses high-temperature streams as a heat source and exchanges heat with water to generate steam. It is not only a cooler for high-temperature streams in industrial production, but also a A device that uses waste heat to provide steam. According to the circulation of high-temperature gas in the heat exchange tube or outside the heat exchange tube, waste heat boilers are divided into fire-tube waste heat boilers and water-tube waste heat boilers. Fire-tube waste heat boilers are high-temperature gas in heat exchange. The circulating water flows into the bottom of the boiler from the steam drum through the descending tube, ...

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Problems solved by technology

[0006] In order to solve the above-mentioned problem of low waste heat utilization rate of the existing fire-tube waste heat boiler, the present invention provides a fire-tube waste heat boiler capable of improving the waste heat utilization rate

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