Can exhaust gases be treated? Treatment method of industrial waste gas

Overview of organic waste gas treatment process: organic waste gas treatment method; Hydrocarbon (HC) is one of the important pollutants that pollute the atmosphere; The regeneration treatment of the adsorbate uses low-temperature water vapor desorption to restore the adsorbate; Scope of application; The organic waste gas purification device is suitable for purification and treatment at room temperature, medium and low air volume, and working principle; The treatment process can be divided into three stages: using granular or fibrous activated carbon to fully adsorb the waste gas; At the beginning, saturated low-pressure water vapor was used to heat and adsorb saturated activities; Hydrocarbons (HCs) are one of the important pollutants that pollute the atmosphere, including simple organic compounds. At present, there are many types of gaseous organic matter pollutants, and there are many treatment methods adopted, and the commonly used ones are:

Absorption method, adsorption method, catalytic combustion method, combustion method, condensation method, etc. Each of these methods has its own characteristics and pros and cons, which need to be weighed according to the degree of pollution, the environment and conditions of use. The common concerns of environmental inspection agencies and pollution control parties are:

Problems such as initial investment costs, operating costs, secondary pollution, treatment effects, and maintenance.

In short, these methods can meet the treatment of gaseous pollutants under certain conditions. The scope of application and characteristics of the above methods are described as follows: organic waste gas adsorption, desorption and condensation technology process, organic waste gas purification device adopts a combination of adsorption method and condensation method to purify organic waste gas.

Give full play to the advantages of the two, the purification efficiency is high, their disadvantages can be used for transformation, the regeneration of the adsorbate is desorbed by low-temperature water vapor, the activity of the adsorbate is restored, and the organic matter is used for desorption. For the purification of organic waste gas, this is a relatively advanced treatment method at present. Industrial waste gas pollution, year after year is pushed to the upsurge, today we will learn about the waste gas in plastic processing, plastic products in the production is required to add stabilizers, antioxidants, light stabilizers, etc., in the process of plastic melting and drawing, it will decompose to produce a large number of pungent organic waste gas, discharged into the air to cause adverse effects on people's senses, but also will bring unnecessary harm to the human body.

Paint exhaust gas treatment water spray technology is widely used in air pollution control, has been applied in the spraying process, such as water curtain cabinet for example, its principle is through water spraying in the exhaust gas discharge, water-soluble or large particles sedimentation, to achieve the purpose of pollutant, clean gas separation. The utility model has the advantage of simple water resources, after precipitation filtration at the same time, can be reused, reduces the waste of water resources, and water sprays a very high efficiency in processing large particle composition, usually used for the pretreatment of waste gas treatment. The plasma containing high-energy active groups is used to decompose the exhaust gas molecules to generate carbon dioxide and water, so as to achieve the purpose of purifying the exhaust gas.

However, this method is not suitable for the treatment of flammable and explosive painted organic waste gas, and there are potential safety hazards, and the later maintenance of the equipment is complicated.

At present, activated carbon suction is a high-efficiency, economical and usable organic waste gas purification device in the eyes of many enterprise manufacturers, and it is an environmental protection equipment product for waste gas filtration and odor absorption. The activated carbon adsorption tower has the advantages of high adsorption efficiency, wide application, convenient maintenance, and can treat a variety of mixed waste gases at the same time. The equipment is an adsorption equipment for purifying higher concentration of organic waste gas and paint waste gas, which uses the high-strength adsorption force of activated carbon itself, combined with the action of the fan to adsorb the organic waste gas molecules, and has a good adsorption effect on the waste gas of organic solvents such as benzene, alcohol, ketone, unitary, gasoline, etc., and the removal rate can be as high as 90 or more.

There are many methods for the treatment of paint exhaust gas in China, including water spray method, condensation method, oxidation method, plasma method, plant liquid vapor phase chemical reaction, catalytic combustion method, and activated carbon adsorption. The use of high-efficiency spray tower to efficiently remove paint residue and paint mist in the spraying exhaust gas, and the use of plant liquid washing can reduce the viscosity of paint residue and paint mist, and improve the removal efficiency of paint slag and paint mist by spray washing tower. The high-activation biological waste gas purification tower is used to ensure that the exhaust gas indicators meet the emission standards, remove the odor in the exhaust gas, and reduce the impact of the exhaust gas on the surrounding environment.

Effectively remove benzene, esters, ketones, non-methane total hydrocarbons, VOCs and other organic waste gases. Low cost, no potential safety hazards, no secondary pollution. Painting exhaust gas treatment directly condenses or adsorbs concentrate after condensation, and then separates and values the organic matter ** condensate.

This method is used for high concentration, low temperature, and small air volume for exhaust gas treatment. However, the investment is large, the energy consumption is high, and the operating cost is high, so this method is generally not used to purify the paint exhaust gas.

Industrial waste gas treatment has always been a problem that plagues everyone, these exhaust gases are highly polluted, long-term exposure will affect the body, and the exhaust gas is directly discharged into the air, which will also have a great impact on air quality.

What are the organic waste gas treatment methods, and what are the advantages and disadvantages of each?

1. Combustion method.

The catalytic combustion method is suitable for the cleaning of flue gas with low concentration and small wind velocity, and it is necessary to rely on extraction processes such as activated carbon filtration to improve the ignition heat of flue gas, but the water vapor, oil stains and dust in the flue gas are easy to cause problems such as the reduction of the filtration volume of activated carbon, and the application is limited.

2. Adsorption method.

Using the mathematical and physical properties of environmental damage to organic matter, Taizhou waste gas treatment equipment manufacturers carry out adsorption and removal of flue gas. It has a high removal rate and is easy to operate, but it has high facility and operational regulatory requirements, and can only be melted into the adsorbent or contaminant sources that can react with the adsorbate.

3. Biological method.

The advantage of biological methods is that they are cheap and do not pollute the air. However, there are shortcomings such as large gas resistance and slow dissolution rate, and the waste gas treatment method is only suitable for the solution of hydrophilic and easily biodegradable organic matter.

4. Catalytic oxidation process.

The dissolution rate of photo-oxygen catalytic oxidation is lower than the diffusion rate of the surface page of environmentally damaging organic matter and desulfurizer, and the desulfurizer is more expensive.

In recent years, with the rapid development of industrial science and technology, it has brought a lot of high-quality experience to our lives, but the decline in the quality of ambient air has also brought us a lot of troubles.

At present, the industrial waste gas treatment equipment on the market mainly treats the waste gas generated in different places, which can effectively remove the harmful gas waste gas generated in the factory workshop. Industrial waste gas treatment is widely used in chemical plants, electronic factories, printing plants, painting workshops, coating factories, food factories, rubber factories, paint factories, petrochemical industries and other places that produce dust, odor, smoke and dust.

Common waste gas treatment equipment includes activated carbon adsorption equipment, incinerator, zeolite runner + combustion furnace, acid and alkali waste gas scrubber, spray tower, etc.

Common waste gas treatment methods include UV photolysis method, activated carbon adsorption method, catalytic combustion method, catalytic oxidation method, acid-base neutralization method, plasma method and other treatment principles and industrial waste gas treatment methods.

Activated carbon adsorption method

Porous materials using catalyst carriers (granular activated carbon and activated carbon fibers) capture VOCs in organic exhaust gases. The industrial exhaust gas containing VOCs is sucked by the catalyst carrier according to the activated carbon bed, and the organic waste gas is cleaned and discharged into the air. The activated carbon adsorption method is mainly used for human fat and lipid cyclonitrogen oxides, most available chlorine organic solvents, common aldehydes, some macrolides and esters, etc.

Catalytic combustion

Catalytic combustion method is a method that uses the heat released by the catalyst to promote the combustion of auxiliary fuels such as gas or oil to heat the mixed gas to a certain temperature (700 800) and stay for a certain time (seconds), so that the combustible harmful substances are decomposed into harmless substances at high temperature. Advantages: The direct combustion method has a simple process, small equipment investment, and is suitable for waste gas treatment with high concentration and small air volume.

Catalytic oxidation

Catalytic oxidation is the process of raising the temperature of the exhaust gas to the temperature of combustible pollutants and making it fully oxidize and decompose. Advantages: It is suitable for the purification of waste gas with low content of combustible organic substances, and the thermal efficiency is very high in the combustion purification treatment technology, the equipment has a long service life, anti-aging and corrosion resistance.

Acid-base neutralization

The acid-alkali neutralization method is usually applied to the treatment of acid-alkaline waste gas, and the acid-alkali waste gas scrubber is the use of acid-alkali neutralization principle, the acidic (alkaline) waste gas and the spray alkali solution (acid) neutralization reaction, the gaseous pollutants are converted into salts, and the sewage is discharged into the sewage treatment system for treatment. After spraying treatment, the exhaust gas emission reaches the atmosphere, and the treatment efficiency of the first-stage spray tower can reach more than 90%.

Industrial exhaust gases have, 1Activated carbon adsorption method (it has not been implemented on the market, and it is solid waste after the introduction of the solid waste law in 2018), 2Plasma light itch decomposition machine decomposition method (in 2019, the use of light itching machine is also slowly abandoned, because the ultraviolet lamp in the light itching machine is also hazardous waste, which is not acceptable to general hazardous waste companies, and it is difficult to deal with it), 3

Catalytic combustion method (at present, the catalytic combustion method is being used in 2019 to slowly eliminate the light itching machine, after all, the catalytic combustion method has relatively large safety risks, requires long-term high-temperature combustion, and the operating cost is relatively high, which brings a certain burden to the enterprise) 4Another is the new media decomposition method (the complete decomposition of VOCs and other exhaust gases at room temperature and normal conditions, and there is only one company in the market at present, which has advantages over the previous three products).

Greenstar environmental protection official account for you to answerRegarding "what are the general methods of waste gas treatment", the following is an introduction to more than 10 waste gas treatment methods, as follows:

Masking method, dilution diffusion method.

Thermal combustion.

Catalytic combustion

Water absorption method. Liquid absorption method.

Adsorption method, biological filter type deodorization method.

Bio-trickling filter type.

Scrubbing activated sludge deodorization method.

Aeration activated sludge deodorization method, etc.

If you are looking for waste gas treatment, I recommend finding a manufacturer with rich professional experience, because this can reduce your time and cost, and can give you a lot of suggestions on how to solve the waste gas and meet the emission standards.

At present, the state control environment is quite strict, and fines of hundreds of thousands or millions are imposed at every turn, so environmental issues are extremely important.

Personal suggestion: In this regard, I suggest you look for manufacturers in the Kunshan area, Aunason Environmental Protection Company focuses on waste gas treatment and provides one-stop solutions, you can consider it.

After collecting the exhaust gas, it is processed in the spray tower, and the deodorant is added to the spray tower with the deodorant of the double cleaner, which can effectively remove the odor and odor and reduce the VOC

The general methods of waste gas treatment include adsorption method, water absorption method, condensation method, combustion method and biological method. Each method has its specific application and advantages and disadvantages, and it is necessary to choose the appropriate treatment method according to the specific conditions such as the nature, concentration, and emission of the exhaust gas.

1.Adsorption method: The adsorption function of the adsorbent is used to transfer the odorous substance from the gas phase to the solid, so as to realize the treatment of waste gas.

The advantage of this method is that it is suitable for treating odorous gases with low concentration and high purification requirements, and the purification efficiency is very high, and it can treat multi-component odorous gases. The disadvantage is that the adsorption cost is expensive, the regeneration is difficult, and the odorous gas to be treated is required to have a lower temperature and dust content.

2.Water absorption method: use the characteristics of some substances in the odor that are easily soluble in water, so that the odor components are in contact with the water, so as to dissolve in the water to achieve the purpose of deodorization.

The advantages of this method are that the process is simple, the management is convenient, the equipment operation cost is low, the secondary pollution is generated, and the washing liquid needs to be treated. The disadvantage is that the purification efficiency is low, and it should be used in combination with other technologies, and the treatment effect of mercaptans and fatty acids is poor.

3.Condensation method: By reducing the temperature of the exhaust gas, the harmful substances are condensed, condensed and separated from the exhaust gas to achieve the purpose of purification. The advantages of this method are large investment and high energy consumption, and it is not suitable for treating exhaust gas with large air volume.

4.Combustion method: It is divided into direct combustion method and catalytic combustion method.

At high temperatures, the odorous substance is fully mixed with the fuel gas to achieve complete combustion. The advantage of this method is that the purification efficiency is high, and the odorous substances are completely oxidized and decomposed. The disadvantage is that the equipment is easy to corrode, consumes fuel, has high treatment costs, and is easy to form secondary pollution.

5.Biological method: use the metabolic action of microorganisms to decompose odorous substances into low-molecular compounds, water and carbon dioxide and other harmless substances.

The advantages of this method are that the process is simple, the operation is convenient, the operation cost is low, and it can deal with multi-component odorous gases. The disadvantage is that the treatment effect is limited for some high-concentration malodorous gases.

In addition, common waste gas treatment methods include lye absorption method, acid absorption method, redox method, etc. In short, the selection of the appropriate exhaust gas treatment method needs to be comprehensively considered according to the specific situation, including the nature, concentration, and emission of the exhaust gas.