Governing technology

How it works

Target audience

Advantages

Disadvantage

Activated carbon adsorption

adsorption of VOCs molecules by adsorbents with rich microporous structure

Large volume of organic waste gas with low concentration or unstable concentration.

High removal efficiency, low energy consumption, mature process, solvent can be recycled after desorption, wide range of applications, and easy to promote.

Large equipment, complex process, high operating cost after investment and secondary pollution generation, adsorbent is prone to poisoning.

沸石 wheel

The zeolite wheel treatment technology uses the characteristics of zeolite to adsorb and desorb at low and high temperatures, respectively, to concentrate organic waste gas. The concentrated waste gas is finally discharged after treatment by waste gas incinerator, RTO, etc.

Suitable for medium and low concentration ranges (exhaust gas emissions can easily exceed standards at higher concentrations) and continuous operation

Withstands high temperatures (500℃), no restrictions on solvent category.

Expensive, low concentration (usually 10~15 times), and the waste gas after concentration must be further treated.

Absorption method

The absorption process is based on the principle of like dissolves like, which means that the harmful components in the waste gas are absorbed by the liquid solvent, thus achieving the purpose of purification.

High water-soluble VOCs, not applicable to low concentration waste gas treatment

Low investment, simple operation, mature technology, can remove gaseous particles, can efficiently remove acidic gases, and has low investment cost and small footprint.

Solvents that cannot be recovered after absorption will cause secondary pollution and there are problems with subsequent wastewater treatment.

Condensation method

Taking advantage of the different saturation pressures of gaseous pollutants at different temperatures and pressures. By reducing the temperature or increasing the atmospheric pressure, some pollutants are condensed to achieve the purpose of purification or recovery.

High concentration, high boiling point, low air volume, single component and recyclable value of organic waste gas.

Economically efficient, low capital investment, simple equipment and operating conditions, and high purity of recovered substances.

The equipment system has high requirements, the degree of purification is not high, and the energy consumption is high.

Membrane separation method

Gas molecules dissolve at the surface of the membrane, creating a concentration gradient because different gas molecules have different dissolution-diffusion rates through the dense membrane, allowing gas molecules to diffuse from the inner side of the membrane to the other side, and finally desorb from the surface on the other side of the membrane, ultimately achieving the separation purpose.

High-concentration organic waste gas with high recovery value

Low investment, quick results, simple process, high recovery rate, low energy consumption, no secondary pollution.

Membrane has low domestic production rate, expensive price, and short membrane life; membrane separation device requires stable flow and pressure gas, and high operation requirements.

Direct combustion method (TO)

Direct combustion method is to decompose high-concentration organic waste gas into harmless substances by using fuel oil or gas as auxiliary fuel at high temperature.

Low volume, high concentration organic waste gas

Decompose organic matter under high temperature conditions of 700-800 degrees, low investment, convenient operation, small footprint, high safety technology and operational requirements, and in addition, thermal energy and gas purification can be recycled.

Fire and explosion hazard, thermal combustion requires fuel, solvents cannot be recovered

Catalytic combustion method (CO)

In the combustion equipment, the organic waste gas is first preheated and then passed through the catalytic bed layer, which completes the chemical reaction process at a lower temperature and a shorter time. The catalytic combustion has a low ignition temperature, and most organic matter and CO can complete the reaction at 200-400 ℃, so the auxiliary fuel consumption is less, and a large amount of nitrogen compounds are reduced, which is suitable for more occasions.

High-concentration organic waste gas

At temperatures between 250-500 degrees, using a catalyst, the organic waste gas is decomposed, with low energy consumption and low equipment requirements.

Investment is high, and the presence of substances such as S and P can easily lead to poisoning of the catalyst.

Regenerative Thermal Oxidation (RTO)

By using ceramic heat storage bodies to store the excess heat generated by waste incineration, the heat generated by incineration is effectively utilized, thus achieving the purpose of economic incineration.

Large volume of organic waste gas with medium and low concentration

Advanced heat exchange technology and new heat storage materials, which can achieve full automatic control, simple operation, stable operation, and high safety and reliability.

Chlorine-containing toxic gases such as dioxins are easily produced in the combustion of waste gas, which can easily lead to explosion accidents.

Regenerative Catalytic Combustion (RCO)

By using ceramic heat storage bodies to store the waste heat generated by the combustion of waste gas, the heat generated by the combustion is effectively utilized, thus achieving the purpose of economic combustion.

Large volume of organic waste gas with medium and low concentration

Advanced heat exchange technology and new heat storage materials, which can achieve full automatic control, simple operation, stable operation, and high safety and reliability.

Investment is high, and the presence of substances such as S and P can easily lead to poisoning of the catalyst.

Low-temperature plasma

By applying an external electric field, using the high-energy particles produced during the discharge process of the medium, these high-energy particles combine with organic pollutant molecules to undergo some complex chemical reactions, and the gold organic pollutants are degraded into some non-toxic, harmless or low-toxic, low-harmful substances.

Lower concentration of organic waste gas

Simultaneous treatment of a variety of mixed waste gases, the treatment capacity can be adjusted, the device is simple, low energy consumption, easy maintenance, and no secondary pollution.

Technical investment is large, discharge cost is high, electrode is easily corroded, service life is not long, and it is easy to cause explosion accidents.

Biodegradation method

The utilization of microorganisms to digest and metabolize pollutants in waste gases, converting them into harmless water, carbon dioxide, and other inorganic salts.

Large volume of organic waste gas with low concentration

Low operating costs, stable treatment effect, small investment, simple equipment, no secondary pollution.

Low efficiency of processing, slow process, and has a certain selectivity for the treatment of waste gas, that is, the universality of the treatment is poor.

Composite photocatalysis

Ultraviolet light irradiation of titanium dioxide produces a large number of highly active free radicals, which react with organic matter to produce small molecular substances such as CO2, H2O

Large volume of organic waste gas with low concentration

Simultaneous treatment of a variety of mixed waste gases, the treatment capacity can be adjusted, the device is simple, the energy consumption is low, and maintenance is convenient.

Low efficiency of treatment, which may produce secondary ozone pollution.