Smoke gas recycling system and its material homogenizing device

Abstract

The invention provides a smoke gas recycling system and its material homogenizing device. The material homogenizing device comprises a feeding section (4) of a reaction tower, a circular chute (5) connected with the feeding section (4), a reaction tower inlet smoke flue (9) connected to the lower part of the feeding section (4) and a recycling smoke flue (6) connected to the reaction tower inlet smoke flue (9). The material homogenizing device further comprises an ash blowing pipeline (1), one end of the ash blowing pipeline (1) is an air inlet connected with the recycling smoke flue (6), andthe other end thereof is connected with the feeding section (4) and faced to the blowing opening at the lower part of the circular chute (5). The material homogenizing device effectively avoids the material agglomeration in the vicinity of the feeding opening of the circular chute, and further avoids the partial flow caused by different smoke gas rates, and also avoids the ash falling caused by material agglomeration; moreover, the device effectively improves the utilization rate of the materials.

Description

technical field [0001] The invention relates to the technical field of flue gas equipment, in particular to a recirculating flue gas system and a material homogenizing device thereof. Background technique [0002] In the flue gas circulating fluidized bed (CFB) desulfurization system, after the circulating fluidized bed bed is established, when the overall system is running normally, it is inevitable that the working conditions will be unstable, which will cause fluctuations in the flue gas flow. When the flue gas volume is low, the flue gas flow rate decreases, and when it is smaller than the free sedimentation velocity of the material particles, the material particles are easy to fall, and ash falling occurs. [0003] In the current flue gas recirculation system, a certain amount of flue gas is usually added to the inlet flue of the reaction tower through the recirculation flue to ensure that the flow rate of each reaction zone in the reaction tower remains constant, so as...

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Problems solved by technology

[0004] However, the circulation chute is located on the feed section of the reaction tower. At the feed place of the circulation chute, due to the agglomeration of materials, on the one hand, it will cause a pressure difference in the same section, so that the flue gas flow rate in the same section is different, that is, a bias flow occurs. , which will cause impact on the inner wall of the reaction tower. If things go on like this, the inner wall of the reaction tower will be worn and pierced; on the other hand, the materials gather into agglomerates, and when the flue gas flow rate cannot hold up the agglomerated materials, the material particles will fall down , the phenomenon of graying

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