Activated-carbon regeneration-gas pretreatment system device and pretreatment process method

Abstract

The invention provides an active carbon regeneration gas pretreatment system device and a pretreatment process method. The system device comprises a regeneration gas wet washing system and a washing solution treatment system, wherein the regeneration gas wet washing system comprises a wet washer, a washing circulation pump, a washing solution discharge pump, a clear liquid pump and a clear liquidtank, and the washing solution treatment system comprises a clarifier, a mud discharge pump, a filter, an ammonia stripper and a brine discharge pump; the wet washer is respectively connected with thewashing circulating pump, the washing liquid discharge pump and the clear liquid tank; the washing liquid discharge pump is connected with the lower part of the wet washer; the upper part of the wetwasher is connected with the clear liquid tank; the clear liquid tank is connected with the clear liquid pump; the washing liquid discharge pump is connected with the clarifier; the clarifier is connected with the filter through the mud discharge pump; and the clarifier is sequentially connected with the ammonia stripper and the brine discharge pump. According to the invention, the pretreatment ofactivated carbon regeneration gas is realized, clean high-concentration sulfur dioxide gas is obtained, and the effect of recovering ammonia is achieved at the same time.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an activated carbon regeneration gas pretreatment system device and a pretreatment process method. Background technique [0002] Activated carbon dry flue gas desulfurization and denitrification technology is an engineering treatment technology that uses activated carbon to simultaneously desulfurize and denitrify. Its treatment process is carried out in a reactor, which can achieve the treatment effect of desulfurization and denitrification in one step. This process can simultaneously remove SO in flue gas 2 , NOx, and can remove dioxins, heavy metals, dust and other pollutants, and the by-product SO 2 It can be processed into various sulfates, sulfites or sulfuric acid products, and has been successfully used in chemical industry, power plant, coking oven, non-ferrous smelting, steel sintering and pelletizing industries. [0003] Activated carbon dry flue gas ...

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Problems solved by technology

[0004] Activated carbon regeneration gas has complex components, except for high concentration of SO 2 In addition, usually contains NH 3 , HCl, HF, SO 3 , dust (mainly carbon powder), to SO 2 Reuse poses certain difficulties

[0005] The existing treatment process is: using water washing process to remove the NH in the flue gas 3 , HCl, HF, SO 3 , carbon powder is washed, and the wastewater is discharged regularly. Since the discharged wastewater is usually acidic, COD, and ammonia nitrogen content are extremely high, it causes great difficulties for subsequent treatment.

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