What are the treatment methods of waste gas?
Main methods of waste gas treatment
1. catalytic oxidation method: the technology of photooxidation catalytic waste gas treatment equipment is a special treatment method that uses special ultraviolet band to break waste gas molecules and further oxidize and reduce them under the action of special catalytic oxidant. First, the waste gas molecules break the organic molecules and their molecular chains by ultraviolet waves in special bands. At the same time, oxygen and water in the air are decomposed to obtain high-concentration ozone, which further absorbs energy, forms free hydroxyl groups with higher oxidation performance, and oxidizes waste gas molecules. At the same time, a variety of composite inert catalysts are configured according to different waste gas components, which greatly improves the speed and efficiency of waste gas treatment, thus achieving the purpose of purifying waste gas.
The main method of waste gas treatment-catalytic oxidation method
Main methods of waste gas treatment. Masking method: mix stronger aromatic odor with odor to mask the odor to make it acceptable;
Main methods of waste gas treatment. Condensation recovery method: the condensation method adopts multistage continuous cooling method, so that the temperature of hydrocarbon components in mixed oil and gas is lower than the condensation point, and changes from gaseous state to liquid state, and the air remains gaseous except water vapor, thus realizing the separation of oil and gas from air and recovering valuable organic matter;
Main methods of waste gas treatment. Soil deodorization method: the mechanism of soil deodorization can be divided into two categories: physical adsorption and biological decomposition. Water-soluble malodorous gases are absorbed and removed by the moisture in the soil, while insoluble malodorous gases are physically adsorbed on the soil surface and then decomposed by microorganisms in the soil. Advantages: low maintenance cost, and the deodorization effect is equivalent to that of activated carbon;
The main methods of waste gas treatment: 5. Dilution diffusion method discharges odorous gas into the atmosphere through chimney, or dilutes it with odorless air to reduce the concentration of odorous substances to reduce odor;
Main methods of waste gas treatment. Adsorption method: the malodorous substances are transferred from gas phase to solid phase by the adsorption of adsorbent.
The main method of waste gas treatment-adsorption method
Main methods of waste gas treatment. Biological method: the gaseous pollutants in waste gas are decomposed into less or even harmless substances by using the life process of microorganisms. There are all kinds of microorganisms in nature, and almost all inorganic and organic pollutants can be transformed;
Main methods of waste gas treatment. Direct combustion method: the method of introducing organic waste gas into the combustion chamber and burning it directly in contact with the flame, so as to decompose the combustible components in the waste gas. This method can be divided into two types of combustion: no auxiliary fuel and auxiliary fuel. If the concentration of combustible pollutants in the exhaust gas is high and the calorific value is high, only the former is selected to maintain the combustion temperature by burning the exhaust gas. The concentration of combustible pollutants in waste gas is low, and the calorific value is small. If auxiliary fuel is needed to maintain the combustion temperature, the latter is selected.
Main methods of waste gas treatment. Waste gas washing method: The washing tower is a waste gas treatment technology, which has obvious effects on industrial waste gas such as acid mist waste gas treatment, alkali mist waste gas treatment and paint waste gas treatment, paint waste gas treatment, organic waste gas absorption and dissolution treatment, chemical waste gas adsorption, oxidation reduction and acid-base neutralization, reaching the secondary emission standard of waste gas.
The main method of waste gas treatment-waste gas washing method
Main methods of waste gas treatment X. Thermal combustion method: Using regenerative thermal oxidation furnace RTO to treat organic waste gas can achieve the dual effect of energy saving;
The main methods of waste gas treatment eleven, water absorption method: using the characteristics that some substances in odor are easily soluble in water, the odor components are directly in contact with water, thus dissolving in water to achieve the purpose of deodorization;
Main methods of waste gas treatment. Adsorption catalytic combustion method: this method uses honeycomb activated carbon for adsorption. After the activated carbon is close to drinking water, hot air is introduced for desorption analysis, and the desorbed waste gas is introduced into catalytic combustion bed for flameless combustion for purification;
Main methods of waste gas treatment. Low-temperature plasma method: under the action of external electric field, electrons in the electrode space gain energy and accelerate their movement, triggering a series of complex physical and chemical reactions such as excitation, dissociation or ionization, breaking the chemical bonds of odor-producing groups, and then achieving the purpose of deodorization through multi-stage purification. Advantages: simple process, simple operation and wide adaptability to gas temperature.
What are the treatment methods of organic waste gas in the workshop?
√? Hello, landlord, according to your question, here are your detailed answers:
At present, the treatment of workshop waste gas has been puzzling people. Commonly used organic waste gas treatment methods include waste gas combustion method, waste gas liquid absorption method and waste gas activated carbon adsorption method.
When choosing the waste gas treatment method, we need to consider the factors such as the amount of waste gas, the composition and concentration of organic solvents, the cost of waste gas treatment equipment and the cost of operation and maintenance, and the space occupied by the equipment. Green Star Environmental Protection provides waste gas treatment such as benzene, toluene, xylene, ethyl acetate, acetone and butanone. Furniture factory workshop, painting factory workshop, spraying workshop, injection workshop, chemical plant workshop, drying room, painting workshop. Obvious effect and low cost.
The five-fold waste gas adsorption filtration purification system is adopted, and the waste gas treatment mode is carefully designed. The waste gas from painting can be purified and filtered layer by layer, which can effectively decompose organic and inorganic malodorous gases such as benzene, toluene, xylene, acetone butanone, ethyl acetate, styrene, hydrogen sulfide, ammonia, methyl mercaptan, sulfur dioxide and acrylic acid. , effectively remove dust particles and acid-base waste gas.
To control the waste gas in the workshop, technicians need to inspect the current situation in the factory and workshop, analyze the source composition and gas production of the waste gas, the content and characteristics of various substances in the waste gas, and judge the causes of the waste gas according to the industrial production process. Make a waste gas treatment plan. According to the process flow, plant size, waste gas content and waste gas properties, the treatment scheme is formulated.
I hope this answer will help you!
What are the five elements of waste gas treatment?
√ Hello, landlord. According to your questions, here are your detailed answers:
Exhaust gas treatment is also called exhaust gas purification. Waste gas treatment refers to the pretreatment of waste gas produced in industrial sites and factory workshops before discharge, so that it meets the national waste gas discharge standards.
General waste gas treatment includes organic waste gas treatment, dust waste gas treatment, acid-base waste gas treatment, malodorous waste gas treatment and air disinfection and purification.
The five factors of waste gas treatment include the following five aspects:
Can effectively remove benzene, toluene, xylene, ethyl acetate, acetone, butanone, ethanol, acrylic acid, formaldehyde and other organic waste gases. And treating acid-base waste gas such as hydrogen sulfide, sulfur dioxide and ammonia.
It depends on how the industry authorities recommend it. As an industry department, the recommendation is highly credible.
It depends on the principle of waste gas treatment. At present, there are many waste gas treatment methods such as activated carbon adsorption, high temperature catalytic combustion, condensation, wet recovery, biological deodorization and so on.
Depends on the success story. Most companies in the market will have many successful cases.
It depends on the brand. See if the company has won the title of excellent exhaust gas treatment company and high-tech environmental protection company recommended by the environmental protection purification association at or above the provincial level.
I hope this answer will help you!
Several main methods of waste gas treatment
Hello, landlord
Please tell me what kind of waste gas you want to deal with. To put it simply, what products did your waste gas produce? First of all, you should look at the overall requirements of local environmental protection for waste gas treatment, and then look at the handling opinions of the EIA report. I can tell you a correct handling method. Otherwise, the way I handled it for you may not be appropriate.
There are two popular methods to deal with waste gas.
First: catalytic combustion
In the process of chemical reaction, the method of using catalyst to reduce the combustion temperature and accelerate the complete oxidation of toxic and harmful gases is called catalytic combustion method. Because the carrier of catalyst is made of porous material, it has large specific surface area and suitable pore size. When the organic gas heated to 300~450℃ passes through the catalytic layer, oxygen and organic gas are adsorbed on the catalyst on the surface of porous materials, which increases the chance of contact and collision between oxygen and organic gas, improves the activity, and makes the organic gas react violently with oxygen to generate CO2 and H2O, and generates heat at the same time, thus making the organic gas harmless.
Catalytic combustion treatment
The catalytic combustion device is mainly composed of heat exchanger, combustion chamber, catalytic reactor, heat recovery system and exhaust chimney for purifying flue gas, as shown in the right figure. Its purification principle is that the unpurified gas is preheated by a heat exchanger before entering the combustion chamber, and then sent to the combustion chamber, where it reaches the required reaction temperature and undergoes oxidation reaction in a catalytic reactor. The purified flue gas releases some heat through the heat exchanger, and then is discharged into the atmosphere through the chimney.
Second: ultraviolet light, oxygen and activated carbon are treated in one machine
Oxygen molecules in the air are decomposed by high-energy and high-oxygen ultraviolet rays to produce free oxygen, that is, active oxygen. Because the positive and negative electrons carried by free oxygen are unbalanced, they need to combine with oxygen molecules to produce ozone.
Ultraviolet oxygen activated carbon all-in-one machine
Chemical principle: UV+O2→O-+O*O+O2→O3. As we all know, ozone has a strong oxidation effect on organic matter and has an immediate effect on removing malodorous gases and other irritating smells.
High-energy ultraviolet light beam is used to crack the molecular bonds of bacteria in malodorous gas and destroy the nucleic acid of bacteria, and then ozone is used for oxidation reaction, thus completely achieving the purpose of deodorization and sterilization.
When the malodorous gas is input into the purification equipment through the exhaust equipment, the purification equipment uses high-energy C- beam and ozone to carry out synergistic decomposition and oxidation reaction on the malodorous gas, so that the malodorous gas substances are degraded and converted into low-molecular-weight compounds, water and carbon dioxide, and then discharged from the body through the exhaust pipeline.
Special high-energy beam is used to irradiate malodorous gases, so that the molecular chain structure of malodorous gases such as ammonia, trimethylamine, hydrogen sulfide, methyl hydrogen sulfide, methyl mercaptan, methyl sulfide, dimethyl disulfide, carbon disulfide, styrene, H2S sulfide, VOC, benzene, toluene and xylene is broken, and the molecular chain of organic or inorganic polymer malodorous compounds is degraded into CO2, H? Wait a minute.
Third, eliminate the unique needs of enterprises and customize processing equipment independently.
Tailor-made waste gas treatment equipment according to the actual situation.
What are the general methods of waste gas treatment?
The treatment method of organic waste gas is as follows:
One is the masked dilution method. As the name implies, masking dilution is to use gases with other smells to cover up the boring and uncomfortable stench in the exhaust gas, so as to achieve the purpose of deodorization; The dilution rule is to dilute high-concentration odor by blowing air until it is difficult to be detected by human senses. This method essentially eliminates the negative influence of odor from the level of sensory perception, but the odor factors that lead to odor still exist.
The second is the absorption method. This is also one of the technologies with the highest penetration rate and the widest application range in municipal and industrial deodorization at present. It mainly uses adsorbents such as activated carbon, and its porous structure has huge specific surface area and van der Waals force to adsorb various gas molecules including odor factors in waste gas, so as to achieve the effect of separation from gas flow. Although the technology is mature and the cost is relatively low, the malodorous components are not really removed, and the adsorbate needs to be desorbed and secondary treated in the later stage, so the service life is short and the effect is not good when dealing with high-concentration malodor.
The third is the cracking method. Through various means to decompose and destroy malodorous gas molecules, the problem of waste gas treatment can be solved directly from the source of malodor. With the development of environmental protection industrial technology, combustion method, pyrolysis method, chemical method, ultraviolet photolysis method, plasma method and biological method have been born in industry. Among them, super plasma method and biological method, as new application technologies in deodorization industry, are being widely used because of their advantages of high deodorization efficiency, low energy consumption, high safety factor and no secondary pollution.
The ion tube developed by Kewei Environmental Protection adopts high-tech core components imported from bioclimatic in Germany, and rare elements such as titanium, neodymium and cerium are added to the material structure of the ion tube. The main structure of the generator consists of a synchrotron and a mesh electrode. The ion tube is wrapped in the timing cavity and does not contact with the external mesh electrode. Compared with the general ion tube competitors with immature technology in the market, the distribution of electric field lines is formed in a very fine annular space as low as 0. 1mm, ensuring full contact with air and polluted gas molecules.
The ion tube is sealed and reinforced by high-density PVC sealing ring, and the bottom is connected with the ion seat by screws, which is convenient to assemble and disassemble; The mesh electrode is connected to the steel column on the ion base through the contact of the metal paddle, which is more suitable for later maintenance. The control device includes ion concentration adjustment and power supply. The shape of internal wire is clear and regular, which is convenient for maintenance and reflects the quality of German seiko everywhere. The mesh electrode is made of 304 stainless steel, the circuit is protected by wear-resistant, high-temperature resistant and corrosion-resistant insulating rubber winding, and the base is upgraded with anti-corrosion and rust-proof technology.
The special transformer for super ion tube has the characteristics of light and thin structure, strong stability and high durability. Built-in custom chip dynamically controls the voltage and current in the equipment. Compared with transformers commonly used in ultraviolet throttling and plasma competing products, this kind of equipment is easy to be paralyzed due to excessive temperature or unstable voltage. By matching the special transformer, the service life of the product is greatly prolonged and the maintenance cost is saved. Although the price of ordinary transformers is lower than that of special transformers, for example, the price of ordinary transformers in the market is generally 200~600 yuan, and the price of Abach, a famous special power supplier, has exceeded 2,000 yuan, but the German bioclimatic super plasma tube supporting special transformers adopted by our company have been included in the plasma tube group on the premise of "quality reaching Abach and more affordable price", realizing one-time investment and lifelong benefit.