Discharge device of moving bed

Abstract

The invention discloses a discharge device of a moving bed. The discharge device comprises a heat exchange bin which is arranged below a pelletization bin, wherein a mounting space for a pelletizationdevice is arranged in the center of the heat exchange bin; the two sides of the upper end of the mounting space are symmetrically provided with material flattening devices; a plurality of air distributing tube layers are arranged below the material flattening devices, and upper and lower adjacent two air distributing tube layers are alternatively arranged; each air distributing tube layer comprises a plurality of air distributing tubes; the bottom of the heat exchange bin is provided with an unloading frame; a discharge hole is formed in the unloading frame; and a crushing tool is arranged between the air distributing tube layers and the unloading frame. The surface of a material layer is combed repeatedly through the material flattening devices, so that the effect of equalizing the material layer is achieved; heat exchange of blast furnace slag particles is realized through the air distributing tube layers, so that heat exchange efficiency is improved, and sufficient recycling of heat is ensured; and the crushing tool crushes the blast furnace slag particles, so that the particle diameters of the particles are uniform, and therefore, the particles can be smoothly discharged, slagdischarge compensation is avoided, and an overheating phenomenon is avoided.

Description

technical field [0001] The invention relates to the technical field of blast furnace slag waste heat recovery, in particular to a moving bed discharge device. Background technique [0002] At present, China is the world's largest steel producer, and its steel output has remained the world's largest for 17 consecutive years. In 2014, China's pig iron production reached 711 million tons, accounting for about 60% of the world's total steel production. During the iron and steel smelting process, a large amount of high temperature slag will be produced. It is estimated that the slag temperature of blast furnace slag can be as high as 1400-1550°C, and the sensible heat value per ton of high-temperature blast furnace slag can be as high as 1260-1880MJ / ton, which is equivalent to 60kg standard coal / ton. According to statistics, based on my country's existing iron and steel smelting technology, 0.3 tons of blast furnace slag will be produced for every ton of pig iron produced. Base...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems existing in the prior art, the present invention provides a moving bed discharge device to solve the unsatisfactory slag discharge effect in the prior art due to the reheating and bonding of the slag particles in the heat exchange chamber. , the technical problem of low heat transfer efficiency

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