Ammonia containing tail gas treatment device in dry ammonium section of alkali industry and treatment method thereof

Abstract

The invention belongs to the field of odor pollutant (ammonia) treatment in the sodium carbonate industry, and particularly relates to an ammonia-containing tail gas treatment device in a dry ammoniumsection of the alkali industry and a treatment method thereof. The device includes an ammonia method desulfurization device and an associated-alkali dry ammonium ammonia-containing tail gas dedustingand absorption device, and the ammonia method desulfurization device is connected with the associated-alkali dry ammonium ammonia-containing tail gas dedusting and absorption device. The ammonia method desulfurization device includes a desulfurizing tower, an oxidation tank, a flue gas absorption circulating pump, a concentration circulating pump and an ammonium sulfate centrifuge, wherein the desulfurizing tower is connected with the ammonium sulfate centrifuge through the concentration circulating pump, and the desulfurizing tower is in loop connection with the oxidation tank through the flue gas absorption circulating pump. Ammonium sulfate filtrate is connected with an ammonia tail gas absorption tower. The ultra-low emission of an odor pollutant (ammonia) is achieved, no waste liquidis discharged, the recovery and utilization rate of ammonia is increased, and a thermoelectric ammonia desulfurization device is optimized.

Description

technical field [0001] The invention belongs to the field of treatment of malodorous pollutant ammonia in the soda ash industry, and in particular relates to an ammonia-containing tail gas treatment device and a treatment method of the dry ammonium section of the soda industry. Background technique [0002] As the environmental protection situation becomes more and more serious, ammonia is a kind of odor pollutant, and ultra-low emission control is imperative. At present, the dust removal of dry ammonium tail gas is mainly carried out through the bag filter, and the ammonia-containing tail gas is further dusted through the absorption tower. At the same time Absorption controls the ammonia content, but the traditional water washing has been difficult to meet the ultra-low emission standards. The ammonia absorption liquid is unstable when heated, and it is easy to decompose again during the cycle absorption process. Low, the statistical result in the industry is about 55%. At ...

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Problems solved by technology

[0004] Aiming at the deficiencies in the prior art, the invention discloses a device for treating ammonia-containing tail gas in the dry ammonium section of the alkali industry and a treatment method thereof. Recycling utilization rate, optimization of thermoelectric ammonia desulfurization device

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