Dust Scrubber for Treatment of Fumed Silica Tail Gas

Abstract

The invention relates to a dust removal and washing tower for treating fume-phase silica tail gas, which includes a tower body, and the tower body is divided into a spray washing section, a packing absorption washing section and a liquid storage section from top to bottom. There are industrial primary water nozzles and dilute acid nozzles in the section; more than two grid fillers are arranged longitudinally in the filler absorption washing section, and concentrated acid distributors are respectively arranged above the grid fillers; concentrated acid distributors are installed at the bottom of the liquid storage section. The acid outlet, the side of the tower body between the liquid storage section and the packing absorption washing section is provided with a mixed gas outlet, and the top of the tower body is provided with a tail gas inlet. The gas-phase silica tail gas dedusting washing tower of the present invention has a good washing and dust removal effect, which can ensure that the subsequent hydrogen chloride absorption tower is not blocked; the tower has a large operating flexibility, which can reach 30% to 120%; the tower type and tower wall materials are respectively improved, Effectively guarantee the reliable operation of the tower; the processing capacity of a single tower is large, which can meet the processing requirements of 5000t / a fumed silica tail gas.

Description

technical field [0001] The invention relates to a dust removal and washing tower for treating gas-phase silica tail gas, which belongs to the field of environmental protection. Background technique [0002] At present, the domestic fumed silica enterprises generally use Venturi dust collector to wash the tail gas, then use two-stage or three-stage packed tower to absorb hydrogen chloride in the tail gas with industrial primary water, and make about 26wt% by-products. Hydrochloric acid, dehydrochlorination tail gas enters the alkali washing tower to remove chlorine and then discharges up to standard. [0003] Since the tail gas produced during the production of fumed silica is a mixed gas containing a large amount of hydrogen chloride, chlorine and a small amount of silicon micropowder, it is highly corrosive and easy to block; at the same time, due to the structural characteristics of the Venturi reactor, the operation The elasticity is small, the washing effect is poor, an...

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Problems solved by technology

[0006] 2. The processing capacity of a single device is small, and the operation flexibility is small

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