Divided-flow type pretreatment device suitable for industrial electric furnace flue gas

Abstract

The invention discloses a divided-flow type pretreatment device suitable for industrial electric furnace flue gas in the technical field of electric furnace flue gas. The divided-flow type pretreatment device comprises an exhaust pipe, communicating pipes are arranged at the top and the bottom of the exhaust pipe, two sets of conveying pipes of the same structure are arranged on the right side of the exhaust pipe, electromagnetic valves are arranged on the two sets of conveying pipes, fans are arranged on the two sets of conveying pipes, the right sides of the two sets of conveying pipes communicate with a gas storage box, the right end of the bottom conveying pipe communicates with an exhaust pipe, the exhaust pipe extends into the gas storage box, a communicating box is integrally formed at the right end of the gas storage box, and a driven mechanism is connected to the inner wall of the bottom of the communicating box. After the flue gas is exhausted, the air in the air bag is not heated to expand any more, the hinged plate is reset, and therefore when the flue gas enters the gas storage box for storage next time, the hinged plate swinging downwards does not stop the flue gas from entering the gas storage box for storage.

Description

technical field [0001] The invention relates to the technical field of electric furnace flue gas, in particular to a split-flow pretreatment device suitable for industrial electric furnace flue gas. Background technique [0002] The flue gas produced by the industrial electric furnace during feeding and tapping is sucked away by the exhaust pipe, and then filtered by a bag filter. The filtered gas is discharged into the atmosphere through the exhaust chimney. The flue gas volume is the largest and the time is the shortest, and the existing dust removal system, whether it is short-term high-flow flue gas or regular low-flow flue gas treatment, is equipped with dust removal equipment according to the maximum flue gas volume, so that the dust removal system and dust removal equipment The volume is very large, which requires a large amount of material consumption, so that the investment cost and operating energy consumption are relatively high. [0003] In the prior art, when t...

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Problems solved by technology

[0002] The flue gas produced by the industrial electric furnace during charging and tapping is sucked away by the exhaust pipe, and filtered by a bag filter, and the filtered gas is discharged into the atmosphere through the exhaust chimney , in the entire steelmaking cycle, the amount of flue gas generated during feeding and tapping is the largest and the time is shortest, and the existing dust removal system is no matter whether it is a short-term high-flow flue gas or a regular low-flow flue gas treatment. The dust removal equipment is set according to the maximum flue gas volume, which makes the dust removal system and dust removal equipment very bulky, which requires a large amount of material consumption, resulting in relatively high investment costs and operating energy consumption.

[0003] In the prior art, when there is a large flow of flue gas, a part of the flue gas is directly discharged from the exhaust pipe to the bag filter for dust removal, and the other part is sent by the smoke storage fan. When the flue gas flow rate is low, the flue gas stored in the storage device is mixed with the flue gas discharged from the exhaust pipe and then discharged, which can greatly reduce the amount of flue gas entering the bag filter and make the bag dust collector The filter area and volume of the filter are reduced, but in actual use, when the stored smoke is discharged, the stored smoke flow rate is too fast, resulting in the formation of a large flow of smoke when it enters the exhaust pipe, resulting in poor use effect. And the storage device needs to be provided with vents. When the smoke enters the storage, the internal air is squeezed out, and when the smoke is discharged into the exhaust pipe, the external air enters. This will cause the vents to be full during long-term use. Impurities in the flue gas flow, for this reason, we propose a split-flow pretreatment device suitable for industrial electric furnace flue gas

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