Horizontal fluidized bed waste heat recovery device for blast furnace granulated slag

Abstract

The invention belongs to the technical field of waste heat recovery and utilization, and particularly relates to a waste heat recovery device for blast furnace granulated slag. A horizontal fluidized bed waste heat recovery device for blast furnace granulated slag comprises a fluidized heat exchange bed, an air distribution device and an air supply device, wherein the fluidized heat exchange bed is provided with a feed opening and a slag outlet; and the air supply device is arranged below the fluidized heat exchange bed, and cooling air is supplied into the fluidized heat exchange bed through the air distribution device. According to the device disclosed by the invention, the waste heat recovery rate of the blast furnace slag is effectively improved, the quality of the recovered waste heat is improved under the condition of ensuring the glass body content of the cooled slag, continuous and stable heat exchange operation of the blast furnace slag is realized, and the problem that slag particles are easy to block is solved.

Description

technical field [0001] The invention belongs to the technical field of waste heat recovery and utilization, and in particular relates to a waste heat recovery device for blast furnace granulated slag. Background technique [0002] Blast furnace slag and steelmaking steel slag are the main by-products of the iron and steel industry. According to my country's current steelmaking process, the production of 1 ton of pig iron requires about 0.3-0.6 tons of blast furnace slag and 0.13 tons of steel slag. The temperature of blast furnace slag and steel slag in the molten state is as high as 1350℃~1450℃. After converting into heat, there is about (1.26~1.88)×10KJ sensible heat per ton of slag, which is equivalent to the heat generated by the combustion of 45~60kg standard coal. In 2019, my country's crude steel output was 969 million tons. If calculated on the basis of 0.3 tons of slag produced per ton of crude steel, my country produced a total of 290 million tons of high-temperatu...

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Problems solved by technology

[0005] Aiming at the shortcomings of the existing blast furnace granulated slag waste heat recovery devices, such as low waste heat recovery efficiency, poor waste heat quality, low content of cooling slag vitreous body, easy blockage and bonding during operation, and inability to operate continuously, the present invention provides a blast furnace granulated slag waste heat recovery device. Slag horizontal fluidized bed waste heat recovery device

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