Blast furnace cinder flushing exhaust steam white smoke elimination and waste heat recovery system

Abstract

The invention discloses a blast furnace cinder flushing exhaust steam white smoke elimination and waste heat recovery system. The system comprises a blast furnace cinder flushing water exhaust steam diffusion tower, an exhaust steam channel and air channels, wherein the blast furnace cinder flushing water exhaust steam diffusion tower is used for discharging exhaust steam, the exhaust steam channel comprises an input end and an output end, the input end communicates with an exhaust port formed in the cinder flushing water exhaust steam diffusion tower, the output end is provided with an exhaust steam induced draft fan, the exhaust steam induced draft fan is used for providing steam extraction power for the exhaust steam, one ends of the air channels are connected to external air sources, the other ends of the air channels are connected to hot air conduits, the air channels penetrate through the exhaust steam channel repeatedly in a wriggling mode, heat exchangers are arranged at the joints between the air channels and the exhaust steam channel, a plurality of water baffle plates which are arranged in the vertical direction are arranged on the side, facing the output end, of each heat exchanger, the adjacent water baffle plates are staggered to form gaps to form a comb-shaped structure, a plurality of flow outlet holes are formed in the bottom wall part, below the water baffle plates, of the exhaust steam channel, the flow outlet holes communicate with a water pipe, and the water pipe is used for discharging condensed water. The blast furnace cinder flushing exhaust steam white plume elimination and waste heat recovery system has the effect of white smoke elimination, and also has the advantages of being capable of recovering the condensed water and realizing recycling of waste heat.

Description

technical field [0001] The invention relates to the field of whitening and waste heat recovery, in particular to a blast furnace slag flushing waste steam whitening and waste heat recovery system. Background technique [0002] During the blast furnace ironmaking process in the iron and steel industry, the blast furnace produces a large amount of high-temperature slag (about 1400-1500 ° C), and the slag is cooled by impact crushing with slag washing water. Blast furnace slag flushing exhaust steam is high-temperature steam (temperature about 90°C) generated instantaneously when slag flushing water hits high-temperature slag. High-temperature steam is generally discharged directly through the chimney (commonly known as "white smoke"), and is not utilized. This not only wastes energy and water resources, but also corrodes surrounding buildings to a certain extent. [0003] In order to control smog pollution, people began to pay attention to the "whitening" treatment of exhaust...

AI Technical Summary

Problems solved by technology

High-temperature steam is generally discharged directly through the chimney (commonly known as "white smoke"), and it is not used. It not only wastes energy and water resources, but also corrodes surrounding buildings to a certain extent.

[0003] In order to control smog pollution, people began to pay attention to the "whitening" treatment of exhausted steam and flue gas. The scheme does not carry out waste heat recovery

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