Device for utilizing desulfurization waste liquid and operation method thereof

Abstract

The invention discloses a device for utilizing desulfurization waste liquid and an operation method thereof. The device comprises a pretreatment adjusting section, a drying curing and tail gas section, a sulfur burning section, a cooling section, a washing section, a conversion absorption section and a tail gas treatment section. The invention further provides an operation method of the device forutilizing the desulfurization waste liquid, wherein comprehensive treatment is conducted on the desulfurization liquid and sulfur foam generated in the coking HPF wet desulfurization process, so thatthe waste is turned into resources, internal circulation is achieved, secondary pollution is eradicated, the production cost is saved, automatic control is achieved, and energy consumption is reduced. Sulfuric acid is prepared through the two-conversion and two-absorption process, a vanadium catalyst is used, a converter uses a refractory fiber adhesive, a ceramic fiber plate and a refractory fiber reinforced coating, the catalytic conversion rate of sulfur dioxide is increased, and the conversion rate is larger than or equal to 99.75%.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of desulfurization waste liquid, and in particular relates to a device for utilizing desulfurization waste liquid and an operation method thereof. Background technique [0002] The existing coking gas is desulfurized by the HPF wet liquid phase catalytic method using ammonia as the alkali source, and a large amount of sulfur foam and desulfurization liquid will be generated during the desulfurization process. Most domestic sulfur foams recover wet sulfur by pressure filtration, or recover solid sulfur by melting sulfur kettles. Due to the high content of impurities in the recovered sulfur, comprehensive utilization is very difficult, and the sales of sulfur are greatly restricted. The desulfurization process contains a large amount of harmful substances, the main components are thiocyanate, thiosulfate, sulfate, etc. Among them, thiocyanate has strong toxicity. If the desulfuriza...

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Problems solved by technology

[0004] A large amount of saline waste liquid produced in the desulfurization process of coke oven gas, its main components are thiocyanate, thiosulfate, sulfate, etc., among which thiocyanate has strong toxicity, the desulfurization liquid is harmless if it is not treated Direct discharge after chemical treatment will cause serious pollution to the environment

[0005] A large amount of sulfur foam is produced in the wet desulfurization process of coal gas. At present, the recovered sulfur contains a large amount of impurities and it is difficult to comprehensively utilize it. It can only be processed at an extremely low price, and the market is not smooth.

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