Waste Gas Treatment

The rapid development of society has brought many problems and one of the serious problems is air pollution. All kinds of waste gas, especially industrial waste gas discharged into the air seriously affect the air environment. And with the air flow diffusion, it threatens people's health. Industrial waste gas refers to all kinds of gases containing pollutants discharged into the air during fuel combustion and production process in the factory area. These waste gases include carbon dioxide, carbon disulfide, hydrogen sulfide, fluoride, nitrogen oxides, chlorine, hydrogen chloride, carbon monoxide, VOCs, soot and production dust. Therefore, how to treat industrial waste gas has become a problem that must be paid attention to in modern industrial production. Alfa Chemistry has rich experience in the treatment of industrial waste gas. We can adopt various pollutant emission control technologies and then develop appropriate treatment methods according to the type, source and related standards of waste gas to help customers effectively treat various industrial waste gases.

Our Services

For industrial waste gas treatment, we can provide the following related services.

Today, Alfa Chemistry serves a number of organizations and enterprises, including:

Treatment Technology

The waste gas treatment technology has the characteristics of complex, comprehensive and systematic. As the characteristics and conditions of waste gas and the direction and focus of waste gas prevention and control are different in each production unit, it is difficult to find comprehensive treatment measure that is suitable for all situations. So, corresponding countermeasures should be put forward according to specific situations. Here, Alfa Chemistry provides some treatment technologies in our company for particular case.

There are many kinds of waste gases. Taking the treatment of VOCs as an example, the treatment technology mainly includes the following four kinds.

• Adsorption technology: The technology uses activated carbon and other materials directly adsorb VOCs. It is suitable for the purification of low concentration of waste gases. The technology is the most classical and commonly used gas purification technology and also is one of the mainstream technologies of industrial VOCs governance.
• Absorption technology: The technology uses solution, solvent or water to absorb the VOCs gas in the industrial waste gas.
• Condensation technology: The basic principle of the technology is that the gaseous pollutants with different saturated vapor pressure that can condense other organic matter out by reducing the temperature and increasing the pressure, so that VOCs can be purified and recycled. It is an effective method for treatment of VOCs.
• Membrane separation technology: Membrane separation technology is a high efficiency separation method and has the advantages of small investment, quick effect, simple process, high recovery rate, low energy consumption and no secondary pollution.

In addition, there are many production units that can produce waste gas. Taking the waste gas treatment of power plant as an example, the general treatment technology is as follows. The pollutants that are of primary interest, and those currently regulated in the power generation industry, include sulfur dioxide, nitrogen oxides, and particulate matter.

• For treatment of sulfur dioxide, the technologies generally include wet scrubbers, spray dryers, dry (sorbent) injection processes, regenerable processes, circulating fluid-bed and moving-bed scrubbers, combined SO2/NOx removal systems.
• For treatment of nitrogen oxides, the two primary strategies that have been widely used in Alfa Chemistry are selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR). There are additional new strategies have been developed, including combining SCR and SNCR technologies (known as hybrid SCR/SNCR) and rich reagent injection.
• For treatment of particulate matter, several control technologies for power plants are available, including electrostatic precipitators (ESPs), fabric filters (baghouses), wet particulate scrubbers, mechanical collectors (cyclones), and hot-gas particulate filtration.

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