Coke oven raw gas waste heat recovery power generation system and method

Abstract

The invention discloses a power generation system through recovery of coke oven raw coke oven gas waste heat. The power generation system comprises a steam drum, a forced circulation device, a saturated steam heat exchanger set, a superheated steam heat exchanger set, main steam regulating valves, air supply regulating valves, a steam turbine and a power generator, wherein the water outlet of the steam drum is connected with the input end of the forced circulation device, the output end of the forced circulation device is connected with the input end of the saturated steam heat exchanger set, and the output end of the saturated steam heat exchanger set is connected with a steam-water mixture input opening of the steam drum; the first saturated steam output opening of the steam drum is connected with the input end of the superheated steam heat exchanger set, the output end of the superheated steam heat exchanger set is connected with the high-pressure input end of the steam turbine through the main steam regulating valves, the second saturated steam output opening of the steam drum is connected with the low-pressure input end of the steam turbine through the air supply regulating valves, and the output end of the steam turbine is fixedly connected with the power generator. According to the power generation system, the coke oven raw coke oven gas waste heat can be converted into steam heat energy to push the steam turbine to apply work, so as to generate electricity.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery and utilization, in particular to a coke oven waste gas waste heat recovery power generation system and method used in metallurgy and coking industries. Background technique [0002] The efficient recovery and utilization of waste heat resources generated in the coking process is the main direction of building a resource-saving and environmentally friendly green coking plant for energy conservation, and it is also one of the main ways to reduce coke oven energy consumption. Therefore, realizing the recovery and utilization of these waste heat will produce great social and economic benefits. [0003] In the early stage, the exploration of the potential of secondary energy quality, the development of value, and the development of supporting technologies and equipment for the utilization of low-quality waste heat and waste energy lag behind. For example, during the high-temperature carbo...

AI Technical Summary

Problems solved by technology

For example, a large amount of high-temperature raw gas is produced during the high-temperature carbonization process of coal in coke ovens. The temperature of the raw gas is about 800°C. A large amount of heat energy is discharged directly without recovery and is not utilized.

Although my country has developed riser heat exchangers in the 1970s and 1980s and received certain popularization and application, the waste heat of the high-temperature coke oven raw gas recovered in the riser heat exchangers uses circulating ammonia water to reduce the temperature of the raw gas to 80 ℃, this recycling method not only wastes heat in vain, but also increases the cost of waste heat recovery

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