Flue gas desulfurization and dust removal integrated device and process and application

Abstract

The invention relates to a flue gas desulfurization and dust removal integrated device and process. The device comprises a flue gas inlet, a flue gas outlet, an ammonification tank, an oxidation tank, a concentration layer, a concentration layer reflux, an absorption layer, an absorption layer reflux, a recovery layer, a recovery layer reflux, a washing layer, a washing layer reflux, a mechanical demisting layer, an electric demisting layer, an absorption circulating pump, an absorption layer spray, a recovery circulating pump, a recovery layer spray, a concentration circulating pump, a concentration layer spray, a washing circulating pump, a washing layer spray, a mechanical demisting cleaning pump, a mechanical demisting layer spray, an electric demisting cleaning pump, an electric demisting layer spray, a circulating tank, a washing tank, a flushing water tank, auxiliary pipelines and the like. The device is characterized in that a traditional desulfurization tower is annularly divided, and the wet-type electric demister is arranged at the top of the desulfurization tower so that the space is saved. The sulfur content in the treated flue gas can reach 35 mg / Nm < 3 > or below, the dust content can reach 5 mg / Nm < 3 > or below, and the ultra-low emission standard of the sulfur content and the dust content of boiler tail gas is met.

Description

technical field [0001] The invention belongs to the field of flue gas treatment, and in particular relates to an integrated device and process for flue gas desulfurization and dust removal. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Traditional ammonia desulfurization flue gas treatment devices generally use two separate equipment, a desulfurization tower and a wet electrostatic demisting device, for combined treatment. The flue gas from the desulfurization tower adopts the form of entering from the bottom and exiting from the top. After the desulfurization is completed, the flue gas needs to be led from high altitude through the flue to the vicinity of the ground ag...

AI Technical Summary

Problems solved by technology

This adjustment process is long and inflexible. After ammonia water is used as an absorbent to participate in the cycle, the chemical reaction potential difference of the circulating absorption liquid gradually decreases with the escape of ammonia, resulting in low activity and low efficiency of the absorption liquid to treat waste gas.

SO in exhaust gas 2 The content is high, causing pressure on environmental protection

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