A moving bed discharge device

Abstract

The invention discloses a moving bed discharge device, which includes a heat exchange bin, the heat exchange bin is arranged below the granulation bin, the center of the heat exchange bin is provided with an installation space for a granulation device, and both sides of the upper end of the installation space are arranged symmetrically There is a flat material device, and several air distribution pipe layers are arranged under the flat material device, and two adjacent air distribution pipe layers are arranged alternately. Each air distribution pipe layer includes several air distribution pipes; the bottom of the heat exchange chamber is provided with The unloading frame is equipped with a discharge port, and a crushing knife is set between the air distribution pipe layer and the unloading frame; the reciprocating combing of the surface of the material layer is realized through the leveling device, which plays the role of uniform material layer ;The heat exchange of the blast furnace slag particles is realized through several air distribution pipe layers, which improves the heat transfer efficiency and ensures the full recovery of heat; the blast furnace slag particles are crushed by the crushing tool to make the particle size uniform, ensuring that the particles can Smooth discharge, avoiding slag discharge compensation and reheating phenomenon.

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...

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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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