Desulphurizing tower for desulphurizing with seawater soda-residue emulsion

Abstract

The invention discloses a desulphurizing tower for desulphurizing with seawater soda-residue emulsion. A defogging section, a seawater absorption section, a seawater soda-residue emulsion absorption section, an oxidation section and a clarification section are sequentially arranged inside the tower from top to bottom. A flue gas inlet is arranged on the side of the tower positioned between the seawater soda-residue emulsion absorption section and the oxidation section, a flue gas outlet is arranged at the top of the tower, a sediment outlet is arranged at the bottom of the tower, and a clarified liquid outlet is arranged on the side of the tower positioned on the upper part of the clarification section. The desulphurizing tower has multiple functions including absorption, oxidation, clarification and fog removal, so as to simplify desulphurizing process; and the flue gas exhaust and water drainage both achieve National Standard. The desulphurizing tower also has the advantages of low equipment investment, small floor area, low operating cost, convenient operation, and high flue gas desulphurizing efficiency (up to 95%); realizes simultaneous treatment of soda-residue and sulfur dioxide in flue gas; and is suitable for flue gas desulphurization in boilers of large-sized, middle-sized and small-sized thermal power stations of ammonia-soda process soda ash production plants in a coastal area, as well as industrial boilers and kilns in industrial and mining establishments.

Description

(1) Technical field [0001] The invention relates to a desulfurization tower, in particular to a seawater white mud milk desulfurization tower which desulfurizes flue gas of power plant boilers, industrial boilers and kilns with waste residue produced by ammonia-soda method soda ash. (2) Background technology [0002] my country is one of the few countries in the world where coal is the main energy source. Coal accounts for more than 70% of my country's primary energy and consumption. Sulfur dioxide emissions from coal and other fuels have caused huge pollution. It is imperative to control the emission of sulfur dioxide pollution. Some thermal power stations in coastal areas adopt the seawater desulfurization method, that is, use seawater to absorb sulfur dioxide in the flue gas, neutralize the alkalinity in the seawater, and then fill it with air to aerate, so that the generated reducing substances are oxidized and the flue gas and drainage meet the standard Discharge, the d...

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Problems solved by technology

Since the effective desulfurization ingredient in seawater white mud milk is a kind of suspended solids such as calcium carbonate with very small solubility in water, sufficient residence time is required in the desulfurization process to dissolve the suspended solids, carry out desulfurization reaction, and make the generated sulfites be absorbed Oxidation to generate stable sulfate, and the fly ash in the flue gas captured during the desulfurization process must be separated, so that the flue gas and effluent can be discharged up to the standard. Traditional desulfurization towers have few functions, and some desulfurization devices have more equipment. The process is complicated, the power consumption is high, and the floor area is large, all of which are not suitable for the desulfurization of seawater white mud milk

So far, there is no report on the integrated production device of flue gas desulfurization using seawater white mud milk at home and abroad

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