Coke oven raw gas sensible heat and hot coke sensible heat combined power generation process and system

Abstract

The invention relates to a coke oven raw gas sensible heat and hot coke sensible heat combined power generation process and system. By a water feeding device, water is supplied for a coke dry quenching boiler and a raw gas waste heat boiler simultaneously; one channel of water and raw gas are subjected to heat exchange in the raw gas waste heat boiler, and then saturated steam is generated; the other channel of water and hot coke are subjected to heat exchange in the coke dry quenching boiler, and then saturated steam is generated; after being gathered, the two channels of saturated steam enter the coke dry quenching boiler for overheating; and after overheating is finished, the saturated steam enters a steam turbine for power generation. The technical limitation of independent recycling of coke oven raw gas sensible heat and hot coke sensible heat at present is broken through, the high-pressure saturated steam generated by recycling of the raw gas sensible heat from the raw gas wasteheat boiler and high-pressure saturated steam generated by recycling of the hot coke sensible heat from the coke dry quenching boiler are combined into a channel of high-pressure saturated steam whichenters an overheating system of the coke dry quenching boiler, and after overheating is finished, the steam turbine is driven to generate power; and therefore, the purposes of improving the waste heat recycling efficiency, saving energy and continuously supplying steam are achieved.

Description

technical field [0001] The invention relates to the technical field of coking, in particular to a process and system for combined power generation of coke oven raw gas sensible heat and red coke sensible heat. Background technique [0002] The heat expenditure in the coke production process is mainly composed of the 950-1050 ℃ high-temperature waste heat brought out by the red coke from the coke oven, the 650-750 ℃ ​​medium-temperature waste heat brought out by the coke oven raw gas, and the 180-250 ℃ coke oven flue gas. ℃ low temperature waste heat and furnace surface heat loss consists of four parts. Among them, the sensible heat taken away by coke oven raw gas and the sensible heat taken away by red coke account for 73% of the heat expenditure of coke ovens. Efficient recovery of these two parts of heat is of great significance for energy recovery and utilization of coking enterprises. [0003] At present, the coke CDQ technology for recovering the sensible heat of red c...

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Problems solved by technology

[0003] At present, the coke CDQ technology for recovering the sensible heat of red coke has been widely used, but there is still no effective recovery method for the sensible heat brought out by coke oven raw gas

However, the current CDQ technology and waste heat utilization technol

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