Coke oven ascension pipe waste heat recovery device and control method thereof

Abstract

The invention discloses a coke oven ascension pipe waste heat recovery device and a control method thereof.The coke oven ascension pipe waste heat recovery device comprises a sleeve arranged outside an ascension pipe in a sleeving mode, a heat exchange cavity is formed between the sleeve and the ascension pipe, the heat exchange cavity is filled with circulating working media, and the sleeve is sleeved with an outer heat exchange mechanism; a hot end located on the outer side of the outer wall of the ascending pipe and a cold end located on the inner side of the inner wall of the sleeve are arranged in the heat exchange cavity, and a cycle working medium absorbs heat at the hot end to be vaporized and then flows to the cold end under the pressure effect to exchange heat with the outer heat exchange mechanism to be liquefied to form circulation. Waste heat recovery of raw coke oven gas is achieved in an indirect heat exchange mode, a circulating working medium in a heat exchange cavity absorbs heat to be gasified at the hot end of the outer wall of an ascending pipe and exchanges heat with an outer heat exchange mechanism at the cold end of the inner wall of a sleeve, the circulating working medium is liquefied when encountering cold and returns to the hot end to form circulation, the indirect heat exchange mode is adopted, and limitation on gas production pressure is avoided; and the problems of tearing, water leakage and steam leakage of welding seams do not exist, a steam-water mixture is prevented from leaking into the carbonization chamber, potential safety hazards are avoided, and safe operation of the coke oven is ensured.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery of raw coal gas, in particular to a coke oven riser waste heat recovery device and a control method thereof. Background technique [0002] The coke oven is the key equipment and energy focus of the production of coking enterprises. The three items with the highest expenditure heat in the coke oven are the high-temperature waste heat brought out by the red coke in the carbonization chamber, accounting for about 37%; About 33%; the low-temperature waste heat brought out by the flue gas. Among them, the recovery technology of high-temperature waste heat and low-temperature waste heat is very mature, but there are relatively few successful cases of recovery and utilization of medium-temperature waste heat brought out by high-temperature raw gas in the riser. [0003] In the prior art, the waste heat recovery device for the riser mainly has three structures: a water jacket structure, a sin...

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Problems solved by technology

[0005] The object of the present invention is to provide a coke oven riser waste heat recovery device and its control method, to solve the existing problems in the prior art for the riser waste heat recovery device that the gas production pressure is below 0.8 MPa, the tar condensation is serious, and the cylinder body is welded. There will be technical problems of tearing, water leakage and steam leakage

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