Waste heat recovery device for coke oven raw gas and combined secondary heat extraction method

A waste heat recovery device and waste heat recovery technology are applied in the heating of coke ovens, the discharge device of dry distillation gas, and coke ovens, etc., which can solve the problems of complex composition of waste gas in industrial coke ovens, waste of water resources and electricity, and periodic temperature changes. , to reduce safety risks, reduce steam pressure fluctuations, and reduce the possibility of

Active Publication Date: 2017-09-26
BAOSHAN IRON & STEEL CO LTD
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Problems solved by technology

[0010] In order to solve the waste of water resources and electricity generated by waste heat utilization of raw gas in coke oven pipelines in the coking process of industrial coke ovens in the prior art, the composition of raw gas in industrial coke ovens is complex, the flow rate of raw gas, temperature cycle changes and replacement The problem of low thermal efficiency

Method used

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  • Waste heat recovery device for coke oven raw gas and combined secondary heat extraction method
  • Waste heat recovery device for coke oven raw gas and combined secondary heat extraction method
  • Waste heat recovery device for coke oven raw gas and combined secondary heat extraction method

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Embodiment

[0061] On a 50-hole coke oven, there are 50 coke oven risers 1 in total, and the sequence of coke pushing is arranged according to "5-2" (that is, coke ovens with an interval of 5 are listed as a group) as follows: the first sequence 1 , 6, 11, 16, 21, 26, 31, 36, 41, 46; the second sequence 2, 7, 12, 17, 22, 27, 32, 37, 42, 47; the third sequence 3, 8 , 13, 18, 23, 28, 33, 38, 43, 48; the fourth sequence 4, 9, 14, 19, 24, 29, 34, 39, 44, 49; the fifth sequence 5, 10, 15 , 20, 25, 30, 35, 40, 45, 50.

[0062] Each riser is equipped with a waste heat recovery component A, a total of 50 coke oven risers are divided into 5 groups according to the above sequence.

[0063] In this embodiment, hydrogen is used as the primary heat extraction medium. The cold hydrogen enters through the circulation fan 3 first, and the cold hydrogen passes through the heat exchange medium inlet pipe A5 of the waste heat recovery component A of the coke oven riser 1 of the same group and enters the h...

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Abstract

A waste heat recovery device for coke oven raw gas and a combined two-stage heat extraction method. The heat exchange medium passes through the heat exchange medium inlet pipe of the waste heat recovery component of the same group of coke oven riser pipes through the circulation fan and enters the heat exchange inner pipe and the heat exchange medium. The heat exchange medium flows out from the heat exchange medium outlet pipe with waste heat, which is the first-stage heat extraction, and then the heat exchange medium flowing out of each heat exchange medium outlet pipe is collected and enters the same group of second-stage heat exchangers with waste heat. The heater and water perform two-stage heat extraction. The heat exchange medium, that is, the heat exchange gas, after exchanging heat with water, the temperature drops to become a cold gas heat exchange medium. The cold gas heat exchange medium is circulated through a closed circulation fan. The present invention reduces the steam pressure fluctuation caused by the periodical shortage of coal gas during direct heat exchange through two-stage heat extraction, and adopts gas heat exchange on the coke oven ascending pipe, which reduces the direct heat exchange ratio of the coke oven. security risk.

Description

technical field [0001] The invention relates to a waste heat recovery and reuse device and its implementation method, in particular to a waste heat recovery and reuse device and its implementation method applied to waste heat in the coke oven riser in the coke oven coking process. Background technique [0002] At present, during the coking process of industrial coke ovens of various iron and steel production enterprises, the raw gas temperature in the coke oven riser is as high as about 750°C, which contains a large amount of heat. However, the industrial coke ovens in the prior art all adopt a rapid cooling process of spraying ammonia water to cool the high-temperature raw gas. Through this process of spraying ammonia water, the temperature of the raw gas can be sharply lowered to 80-85°C. After the final cooling, the raw gas is cooled Then indirect cooling to room temperature with cooling water. [0003] However, this rapid cooling process not only wastes the heat in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B27/00F28D7/00
CPCY02P20/129
Inventor 郭水华向顺华程乐意
Owner BAOSHAN IRON & STEEL CO LTD
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