Coke-oven riser tube and method for recovering heat of coke-oven raw gas with application of coke-oven riser tube

Abstract

The embodiment of the invention discloses a coke-oven riser tube and a method for recovering heat of coke-oven raw gas with the application of the coke-oven riser tube. The sidewall of the coke-oven riser tube is equipped with at least one external fluid inlet which penetrates through the inner wall and outer wall of the riser tube. Thus, an external fluid is sprayed into the coke-oven riser tube through the external fluid inlet to change the flow field of coke-oven raw gas inside the coke-oven riser tube. according to the above technical scheme, by arranging at least one external fluid inlet on the sidewall of the coke-oven riser tube so as to spray the external fluid into the coke-oven riser tube through the external fluid inlet, the flow field of the coke-oven raw gas is changed, Reynolds number of flowing of the coke-oven raw gas is increased, and heat transfer efficiency of the coke-oven raw gas in the riser tube is enhanced. Further, recovery utilization rate of heat of the coke-oven raw gas is raised, and operation efficiency of a coke oven is enhanced.

Description

technical field [0001] The invention relates to the field of coking process waste heat recovery, in particular to a coke oven riser and a method for recovering raw gas heat by using the riser. Background technique [0002] During the coking process of the coking plant, the temperature of the raw gas escaping from the carbonization chamber through the riser is about 650°C-750°C, and the heat it brings out accounts for about 36% of the total output heat of the coke oven. Generally, the coking plant will This part of heat is recovered and reused to achieve the purpose of resource saving and environmental friendliness. [0003] At present, the raw gas heat recovery method generally used in coking plants is to pass a heat exchange medium between the inner wall and outer wall of the coke oven riser to form a heat exchange layer; figure 1 As shown, a heat exchange medium is passed between the inner wall 10 and the outer wall 11 of the coke oven riser. The raw coal gas is discharg...

AI Technical Summary

Problems solved by technology

However, in practical applications, due to the slow heat exchange between the raw gas near the center of the coke oven riser and the heat exchange medium, it often escapes from the coke oven riser before the heat exchange can be fully performed, so this heat recovery The heat exchange efficiency of the method is low, and the ability to recover heat is limited

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