Alkaline liquid absorption tower with filling backwashing device

Abstract

The invention discloses an alkaline liquid absorption tower with a filling backwashing device. The alkaline liquid absorption tower comprises an absorption tower, an alkaline liquid storage tank, a circulating pump and a backwashing circulating system, wherein the absorption tower is internally provided with a filling layer; a tail gas inlet is formed in a side wall of a tower body located below the filling layer; the absorption tower is provided with a tail gas outlet at the top and an alkaline liquid outlet at the bottom; the alkaline liquid storage tank is arranged below the absorption tower and is connected with the alkaline liquid outlet; an outlet formed in the bottom of the alkaline liquid storage tank is connected with an inlet end of the circulating pump; the backwashing circulating system comprises an alkaline liquid inlet pipeline, a backwashing pipeline and a backwashing device. The device disclosed by the invention has the advantages of relatively small investment and simple structure; the problem that inorganic salt in filling is crystallized in the absorption tower can be solved relatively well, the absorption effect of the absorption tower is improved and the pollution, caused by tail gas, on the environment is avoided.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to an alkali liquor absorption tower with a packing backwashing device. Background technique [0002] In the process of chemical production, for the gas generated in the reaction process, a micro-vacuum method is often used to introduce the gas of the reaction device into the absorption tower for absorption. In this process, the technology of absorbing various gases is used in the lye absorption tower has been widely used. [0003] Calcium hypochlorite contains hypochlorite ions, which has strong oxidation and bactericidal ability, superior to other inorganic chlorate and organic chlorine compounds, and can be widely used in textile, papermaking and other industries, as well as swimming pool water, tableware, food and disinfection of sanitation facilities. Calcium hypochlorite, also known as bleaching powder, is a strong oxidizing agent. In the process of c...

AI Technical Summary

Problems solved by technology

In the process of calcium hypochlorite production and preparation, the tail gas discharge will contain chlorine and other gases, and the tail gas will be absorbed by the neutralization effect of lye and chlorine. Chlorine will form inorganic salts after being absorbed by lye, but the absorption tower will In use, when the absorption liquid is close to saturation, the inorganic salt will crystallize and precipitate on the filler in the absorption tower, and deposit at the place where the flow velocity slows down. The free cross-section of gas supply and liquid circulation is continuously reduced, which leads to the blockage of the packing layer, which affects the absorption effect of lye on tail gas, leads to production safety accidents or harmful gases such as chlorine gas are directly discharged into the atmosphere, causing environmental pollution

Images