Coke oven crude gas waste heat recycling method and dedicated heat exchange type ascending tube

Abstract

The invention relates to a coke oven crude gas waste heat recycling method and a dedicated heat exchange type ascending tube, belonging to the technical field of coke oven heat energy recycle. In the technical scheme, gas as a heat exchange medium enters into a heat exchanger in the ascending tube through a gas outlet after being pressurized by a circulator; in the heat exchanger in the ascending tube, the gas is heated by high-temperature gas which flows out of the ascending tube after being cooled by the gas; the heated gas enters into a waste heat utilization heat exchanger after flowing out of the heat exchanger in the ascending tube, enters into the circulator to be pressurized after discharging heat energy and then enters the next circulation, and by such a circulation, the heat energy of the gas in the ascending tube of a coke oven is continuously taken out of the ascending tube by the gas and is utilized by the waste heat utilization heat exchanger. By using the coke oven crude gas waste heat recycling method and the dedicated heat exchange type ascending tube, tar bonding or floccule plugging can not be generated on a heat exchange surface, and in addition, heat exchange devices in the ascending tube are excellent without damage and can be started up for working at any time, and other parts can be put into work at any time, thus, the technical problem expected to be solved for a long term in the field is solved.

Description

technical field [0001] The invention relates to a coke oven raw gas waste heat recycling method and a special heat-exchanging rising pipe, belonging to the technical field of coke oven raw gas waste heat recovery and utilization. Background technique [0002] As far as thermal energy utilization is concerned, a wealth of background technology has been accumulated in the industrial field since the British Industrial Revolution for hundreds of years. However, since the coke enterprises used the carbonization chamber method to burn coke in these background technologies, the waste heat of the high-temperature coke oven raw gas in the rising pipe has not been effectively utilized, and the heat can only be wasted by cooling down with circulating ammonia. For example, heat exchange with raw coal gas, water jacket method, etc. have not been successful. In recent years, neither the heat pipe technology nor the heat transfer oil technology can run stably for a long period. The main p...

AI Technical Summary

Problems solved by technology

In recent years, neither the heat pipe technology nor the heat transfer oil technology can run stably for a long period. The main problem is that none of these background technologies has overcome the difficulty of coke oven gas heat exchange, and tar sticks to the heat exchange surface, and flocs are blocked. Water leakage on the heat exchange surface affects coke production; or when other parts of the heat exchange system fail and stop working, the carbonization chamber method cannot stop the furnace in a short period of time if a furnace of coke is not produced, so the heat pipe bursts and heat conduction occurs. Problems such as oil overheating and coking

Images