Coke oven ascension pipe heat exchanger raw gas outlet temperature interlock control device and process

Abstract

The invention belongs to the field of coke oven ascension pipe waste heat utilization, and particularly relates to a coke oven ascension pipe heat exchanger raw gas outlet temperature interlock control device and process. The device comprises a coke oven ascension pipe heat exchanger, and the coke oven ascension pipe heat exchanger is provided with a deoxygenated water inlet, a raw coke oven gas inlet, a steam-water outlet and a raw coke oven gas outlet; the raw coke oven gas outlet is sequentially provided with a temperature upper disc indicator and an on-site thermometer; a regulating valvegroup is arranged at the deoxygenated water inlet and sequentially comprises a first gate valve, a regulating valve and a second gate valve, and a throttle valve is arranged on a bypass; the temperature upper disc indicator is connected with the regulating valve of the deoxygenated water inlet, can monitor the temperature of the raw coke oven gas outlet of the riser heat exchanger on line, and control water inlet flow amount by using temperature signals and ascension pipe heat exchanger water inlet regulating valve interlocking, thereby the stable operation of the system is ensured. Control issimple and feasible, cost is saved, and raw coke oven gas quality of a downstream chemical production section is improved.

Description

technical field [0001] The invention belongs to the field of waste heat utilization of coke oven ascending pipes, and in particular relates to a coke oven ascending pipe heat exchanger raw gas outlet temperature interlocking control device and technology. Background technique [0002] The coke oven riser waste heat utilization technology has become increasingly mature and has been gradually applied to various coking enterprises, which is of great significance for enterprises to improve energy utilization. The raw gas temperature at the outlet of the coke oven carbonization chamber is about 650-850°C, and enters the coke oven riser heat exchanger to exchange heat with deoxygenated water. After the heat exchange, the raw gas temperature drops to 400-550°C. [0003] At present, one of the reasons why the coke oven riser waste heat utilization technology has not been applied on a large scale is that the temperature of the raw gas outlet is not suitable for control, and it is eas...

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Problems solved by technology

[0003] At present, one of the reasons why the coke oven riser waste heat utilization technology has not been applied on a large scale is that the temperature of the raw gas outlet is not suitable for control, and it is easy to cause the temperature of the raw gas outlet to be too low during operation, resulting in tar formation on the inner wall of the riser heat exchanger. When the condensed tar encounters an open flame in the coke oven and burns, it will produce "black smoke" phenomenon visible to the naked eye, and slagging will occur in the gas after cooling, which will affect the heat transfer efficiency of the riser and affect the raw gas quality of the downstream chemical production section , will also cause certain pressure on environmental protection production, leading to safety hazards

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