Method for treating VOCs (Volatile Organic Chemicals) and foul gas generated in sucralose production process

Abstract

The invention discloses a method for treating VOCs (Volatile Organic Chemicals) and foul gas generated in a sucralose production process, which comprises the following steps: firstly, feeding waste gas into a spray tower, and pre-degrading macromolecular organic matters which are difficult to biologically treat originally and foul molecules with high biotoxicity to reduce the biotoxicity of the waste gas; and introducing the waste gas as a nutrient source and a gas source into a wastewater treatment system to quickly degrade the waste gas, thereby implementing simultaneous waste gas treatmentby using the wastewater system. According to the method, chemical reagent aqueous solution pretreatment and microbiological treatment are combined and cooperate with each other, so that the defect that single-stage treatment emission of a chemical solvent does not reach the standard is overcome, the toxicity of the waste gas to organisms is effectively reduced, and up-to-standard emission of VOCsand malodorous gas is realized. The method is simple in treatment process, low in operation cost, wide in applicability and high in waste gas removal rate, the risks of explosion and combustion are completely eradicated by adopting a wet treatment process, and a new way is provided for waste gas treatment in industrial production.

Description

technical field [0001] The invention relates to the technical field of chemical production waste gas treatment, in particular to a treatment method for sucralose production tail gas in industrial production. Background technique [0002] There are two kinds of industrial waste gas treatment methods in the prior art. The one is to eliminate the gas in the waste gas (such as: thermal oxidation, catalytic oxidation, plasma oxidation, biodegradation, photodegradation, etc.); the other is to separate the gas from the waste gas (such as : condensation, membrane separation, adsorption, absorption, etc.). At present, the gas elimination method is widely used, but this method has the disadvantages of large equipment investment, high operating costs, and even secondary pollution of the exhaust gas; while the separation method can realize the secondary utilization of resources, but usually requires more Purified solvents can only be obtained through advanced processing steps, the reco...

AI Technical Summary

Problems solved by technology

At present, the gas elimination method is widely used, but this method has the disadvantages of large equipment investment, high operating costs, and even secondary pollution of the exhaust gas; while the separation method can realize the secondary utilization of resources, but usually requires more Purified solvents can only be obtained through specific processing steps, the recovery process is complex, and the operating costs are also high

[0003] Due to the complex composition of the exhaust gas produced in the production process of sucralose, and its stable performance and refractory degradation, the treatment of the exhaust gas from the production of sucralose has become an obstacle to the production and development of this product

The thermal oxidation treatment of the incinerator used in production not only has the risk of explosion during the combustion process, but also the exhaust gas is difficult to meet the standard. The concentration of VOCs is as high as 5000-6500mg / L, and the concentration of malodorous gas is as high as 350-470mg / L. Secondary pollution, affecting the normal life activities of surrounding residents