An exhaust gas recovery, purification and recycling device and process for an annealing furnace system

Abstract

The invention discloses a tail gas recovery purification recycling device of an annealing furnace system. The tail gas recovery purification recycling device of the annealing furnace system is characterized by comprising components of an adsorption purification device, a circulation power device, a catalysis purification device or a deoxidizing device, a first cooling device, an air and water separator, and an adsorption drying device, and further comprising a pipeline connected among all the components, wherein all the components are sequentially connected through the pipeline, an air inlet of the adsorption purification device is connected with a tail gas outlet of an annealing furnace, an air outlet of the adsorption drying device is connected with an air inlet of the annealing furnace through the pipeline, and a first pressure adjustment device is arranged on the pipeline. The tail gas recovery purification recycling technology of the annealing furnace system is characterized in that tail gas sequentially passes through the adsorption purification device, the circulation power device, the catalysis purification device, the first cooling device, the air and water separator and the adsorption drying device from the tail gas outlet of the annealing furnace, and finally enters the air inlet of the annealing furnace through the first pressure adjustment device. The tail gas recovery purification recycling device and the tail gas recovery purification recycling technology of the annealing furnace system achieve purification treatment of the tail gas of the annealing furnace, and the tail gas after the purification treatment can be recycled, and therefore energy consumption is effectively reduced.

Description

Technical field [0001] The invention relates to a bell-type bright annealing furnace or continuous annealing furnace, in particular to a tail gas recovery, purification and recycling device and process of an annealing furnace system, and is mainly used for tail gas treatment of the bell-type bright annealing furnace or continuous annealing furnace. Background technique [0002] At present, the protective gas used for the bell-type bright annealing furnace is mainly pure hydrogen, and the tail gas is basically directly burned or vented to the atmosphere. Some manufacturers only use part of the gas as combustion gas to burn and recover heat, which is not only a waste Has lost energy and is very unsafe. There are mainly two types of exhaust gas recovery, purification and recycling processes in the existing bell-type bright annealing furnace system: [0003] The first type: as disclosed in the Chinese patent (CN101956061B), the protective gas recovery and recycling process of the bell...

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Problems solved by technology

[0003] The first type: as disclosed in the Chinese patent (CN101956061B), the bell-type bright annealing furnace protective gas recovery and recycling process and its device are to pretreat the tail gas by cold treatment, but this process cannot effectively process the impurities in the tail gas. It will cause pollution of equipment pipelines, failure of adsorbents, etc., and increase equipment maintenance costs

[0004] The second type: as disclosed in a Chinese patent (CN102538488B), a tail gas purification and recycling device and process for a bell-type bright annealing furnace system is pretreated by rinsing to deal with the problem of impurities in the tail gas, but it will be brought into Saturated water, which increases the subsequent processing problems and increases the production cost of the equipment

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