Heat accumulating type flue gas waste heat recovery device

Abstract

The invention provides a heat accumulating type flue gas waste heat recovery device. The device consists of a heat accumulator and a heat exchanger, wherein the heat accumulator comprises a heat accumulator barrel and at least one heat accumulating body arranged in the middle or on the inner wall of the heat accumulator barrel, the front end of the heat accumulator barrel is provided with a flue gas inlet, and a rear end outlet of the heat accumulator is connected with the heat exchanger directly or by a flue; and a flue gas outlet is formed at the tail end of the heat exchanger. The heat accumulating body is made of a solid heat accumulation material or a phase-change heat accumulation material (PCM material). The heat accumulating type flue gas waste heat recovery device has the advantages of suppressing temperature fluctuation of flue gas removing, effectively increasing recovery rate of waste heat and improving waste heat output quality, reducing production energy consumption of enterprises to the maximum degree, and fully meeting flue gas waste heat recovery requirements of various industrial furnaces and industrial boilers.

Description

technical field [0001] The invention relates to an industrial flue gas waste heat recovery device, in particular to the waste heat recovery and utilization of high, medium and low temperature flue gas of various industrial boilers and industrial heating furnaces. The utility model belongs to the technical field of energy saving of industrial boilers and industrial furnaces. Background technique [0002] In metallurgy, chemical industry, food, rubber, petroleum and other industries, various industrial boilers and industrial kilns are the most important energy-consuming equipment. The thermal efficiency of industrial boilers and industrial furnaces (hereinafter collectively referred to as heating furnaces) directly affects the energy consumption per unit of production capacity of an enterprise. However, due to some special process requirements, the exhaust gas temperature of many heating furnaces is relatively high, especially in the metallurgical industry, the exhaust gas te...

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Problems solved by technology

However, due to the influence of load fluctuations or process cycles, the exhaust gas temperature of many heating furnaces is extremely unstable, with large fluctuations and frequent fluctuations, which adds greater difficulty to the design of waste heat recovery devices

[0004] Almost all waste heat recovery devices of heating furnaces that have been built or are under construction are designed with the average smoke temperature, which is not only difficult to recover peak and low valley heat, but also the output heat quality is extremely unstable

[0005] Therefore, at present, there is no flue gas waste heat recovery device that can really meet the large-scale fluctuation of flue gas temperature (especially the large-scale fluctuation of high-temperature flue gas).

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