VOCs organic waste gas treatment equipment--Hubei Huichang Environmental Protection Technology Co., Ltd.

VOCs organic waste gas treatment equipment

Belong to： Equipment for flue gas desulfurization, denitrification, and VOCs treatment

Organic waste gas is part of the gaseous pollutants, from a wide range of sources, chemical waste gas, fluorine waste gas, gaseous hydrocarbons, malodorous gases, etc. are organic waste gas. Organic waste gas is generally flammable and explosive characteristics, but also toxic and harmful, not only damage to the environment, but also a threat to human health, and treatment is difficult. Organic waste gas from the composition of roughly including formaldehyde, xylene, acetone, butanone, acetic acid, ethyl ester and so on.
At present, domestic and foreign use of gaseous pollution management technology are: dry neutralisation, absorption, adsorption, ion deodorisation, microbial degradation, ozone (composite activated oxygen method), combustion and condensation method and several other methods. Each method has its own advantages and disadvantages, as shown in the table below.

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Comprehensive Comparison Table of Commonly Used Exhaust Gas Treatment Processes

Methods	Principle of operation	Working body	Applicable objects	Remarks
Absorption	The use of malodorous substances dissolved in water or with other chemical substances oxidation, neutralisation, complexation, salt formation reaction, the generation of odourless molecules	Plant extracts	Amino, mercapto and other odour molecules	Good effect, stable operation, but there is no very good domestic absorption fluid.
		Physical absorption: water	Water-soluble odour components	High water consumption, difficult to treat wastewater, unstable results
		Chemical absorption: alkali	Acidic odour components	Deodorisation efficiency is general, there is secondary pollution, when the concentration of malodorous gas is high, multi-stage absorption is required. Disadvantages: huge volume, high investment, and the scope of application is quite limited.
		Chemical absorption: Acid	Alkaline odour components
		Strong oxidising agent	easily oxidises and breaks down malodour components.
Adsorption	Adsorption of odour molecules using porous media	Physical: Activated Carbon	Hydrocarbons	Simple equipment, deodorant effect is good, suitable for low concentration of malodorous gas treatment, generally used for compound malodorous final purification, when the gas concentration is high, the gas must be pre-treatment such as water washing, acid washing or alkali washing, and dusty gas must be pre-dusting treatment. Disadvantages: high investment, operation and maintenance workload, the adsorption effect is not stable, the performance of the initial good, after the operation of the deodorant efficiency decreased rapidly, and the concentration is small, the intensity of the odor, fishy smell has no obvious effect.
		Chemical: Impregnated activated carbon	H₂S etc.
		deodoriser	Alkaline, acidic odour components
		Iron oxide-based desulphurisation agent	H₂S
plasma (physics)	The plasma method relies on molecular exciters - using high frequency and high pressure and adopting the principle of molecular resonance.	exciter	Easily decomposed malodour components and malodour gases with unstable molecular structure	It has the advantages of small area, convenient operation and low running cost. Disadvantages: the treatment effect is affected by the concentration, high investment costs, the need for regular replacement of ionic tubes, imported from abroad, expensive. And the possibility of spontaneous combustion
Incendiary method	Odourous substances are mostly combustible and decompose into harmless inorganic substances such as water and CO2 after combustion.	Direct combustion Catalytic combustion Concentrated combustion	Combustible odour components	High deodorisation effect, but the ignition temperature of organic waste gas is generally between 100-720 ℃, and it is often necessary to add auxiliary fuel for continuous combustion. Disadvantages: high equipment and operating costs, temperature control is complex, generally used to deal with high concentrations of small volume of organic waste gas, not suitable for odour control.
condensation	In systems where two phases of gas and liquid coexist, vapour changes to liquid due to condensation and liquid changes to gas due to evaporation.	physiotherapy	organic gas	Higher removal efficiency for individual organic gases. Disadvantages: high equipment and operating costs, complex temperature control, generally used to deal with high concentration of small volume of organic waste gas, not suitable for odour control.

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