Flue gas seal cover and sintering machine flue gas circulating system

Abstract

The invention relates to the technical field of metallurgy industrial sintering production, in particular to a flue gas seal cover and a sintering machine flue gas circulating system. The flue gas seal cover includes a seal cover body, and further includes a depressurizing pipe arranged on the seal cover body, one end of the depressurizing pipe communicates with the inner part of the seal cover body, the other end of the depressurizing pipe communicates with a sintering machine wind box, and flue gas in the seal cover body can be introduced to the sintering machine wind box through the depressurizing pipe. According to the flue gas seal cover, the flue gas with high temperature can be sent to the sintering machine wind box through the depressurizing pipe and then introduced to a flue collector, the flue gas in the cover is not needed to be drained outwards, on one hand, the pressure in the cover can be prevented from being too high, on the other hand, the temperature of the drained flue gas of the flue collector can be improved, thus the situation that pipelines and equipment are corroded due to vapor condensation is prevented, and waste heat of the flue gas in the seal cover bodyis fully utilized.

Description

technical field [0001] The invention relates to the technical field of sintering production in the metallurgical industry, in particular to a flue gas sealing cover and a sintering machine flue gas circulation system. Background technique [0002] The sintering flue gas circulation technology is to extract the flue gas from the air box of the main flue of the sintering machine. After dust removal, it is mixed with the flue gas drawn from the sintering cooler into the mixer to form mixed hot flue gas, and then the mixed hot flue gas is sent to The surface of the material layer of the sintering machine is sintered circularly to reduce the amount of flue gas from the sintering machine and realize hot air sintering. The flue gas sealing cover to ensure that the circulating flue gas does not leak out and reduce the leakage of normal temperature air is an important structure for recycling the sintering flue gas. [0003] In the prior art, after the flue gas from the high-temperat...

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Problems solved by technology

[0003] In the prior art, after the flue gas from the high-temperature bellows is selected by flue gas circulation to enter the circulation system, the temperature of the flue gas discharged from the main flue decreases, and condensed water vapor is prone to corrode pipes and equipment

During the continuous feeding process of sintering, due to fluctuations in the granulation and sintering process, when the air permeability of the sintering bed suddenly deteriorates, a large amount of flue gas accumulates in the flue gas sealing hood, which increases the pressure inside the hood. The method is to directly discharge the flue gas in the hood, which reduces the pressure in the hood but wastes a lot of waste heat of the flue gas

[0004] Therefore, it is necessary to propose a fume sealing hood, which can solve the problem that the waste heat of the flue gas in the fume sealing hood cannot be fully utilized in the prior art

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