Low concentration formaldehyde waste gas oxidation treatment process and special equipment

Abstract

The invention relates to a low concentration formaldehyde waste gas oxidation treatment process and special equipment. A collection tower, a spray pipe component, a formaldehyde liquid circulation tank and a formaldehyde solution oxidation tank are arranged, wherein a chimney is arranged on the collection tower, the formaldehyde liquid circulation tank is arranged at the bottom of the collection tower, the spray pipe component is arranged at the upper part of the inside of the collection tower, an organic waste gas inlet pipe is arranged at the lower part of the collection part which is connected with an organic waste gas pipeline through a pipeline and a fan, and a liquid outlet is formed in the side wall of the formaldehyde liquid circulation tank. According to the low concentration formaldehyde waste gas oxidation treatment process and special equipment, by the aid of the characteristic that formaldehyde is very soluble in water, formaldehyde is absorbed by water, so that the formaldehyde waste gas concentration is reduced, waste gas standard emission is can be realized, at the same time, a formaldehyde concentration solution can be obtained after absorption, formaldehyde is decomposed into harmless carbon dioxide and water through oxidation of hydrogen peroxide, and the absorptivity of formaldehyde in industrial waste gas can be as high as 95% or above.

Description

technical field [0001] The invention belongs to a waste gas collection system, in particular to a collection system for collecting formaldehyde waste gas. Background technique [0002] Formaldehyde is an important organic chemical raw material, mainly used in the production of phenolic resin (PP), urea-formaldehyde resin (UF), etc. It is widely used in agriculture, water treatment, paint, medicine and dyestuff, etc. Formaldehyde has the strongest reducing ability among aldehydes, and its chemical properties are relatively active. Moreover, formaldehyde has a pungent smell and is harmful to the human body if it exists in the environment. Since low-concentration formaldehyde waste gas is unavoidably produced in industrial production, the traditional single activated carbon adsorption or catalytic incineration method requires large investment, high operating costs, and requires additional energy consumption, which will increase atmospheric heat pollution. According to the cha...

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Problems solved by technology

Since low-concentration formaldehyde waste gas is inevitably produced in industrial production, the traditional single activated carbon adsorption or catalytic incineration method requires large investment, high operating costs, and additional energy consumption, which will increase atmospheric heat pollution. According to the characteristics that formaldehyde is easily soluble in water, the concentration of formaldehyde is increased correspondingly through water circulation absorption, and then through the oxidation treatment of formaldehyde aqueous solution, formaldehyde is turned into non-polluting carbon dioxide and water, and the treated solution is further supplemented and absorbed. Therefore, it is necessary to develop an efficient, economical and energy-saving formaldehyde waste gas recovery and oxidation process

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