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Several treatment methods of printing waste gas

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the waste gas produced by the printing plant has complex components, heavy odor, and belongs to flammable and explosive gases. Moreover, if the waste gas is directly discharged into the atmosphere without purification, it will have a great impact on the surrounding environment. I hope the following five printing plant waste gas treatment methods can help you deal with the waste gas of the printing plant
1. Plant liquid gas phase reaction: plant liquid is atomized under high pressure to form a fog like gas phase. The dispersed plant liquid molecules have great surface area and surface energy compared with liquid molecules. In the purification equipment, the plant liquid molecules in the gas phase and waste gas molecules form a gas phase rapid absorption environment
2. Plant liquid absorption method: plant liquid molecule is a non-toxic and harmless macromolecular high activity long-chain substance. After atomization and dispersion, it can quickly absorb waste gas molecules. This purification method is also called bonding polymerization method. After the components of waste gas pollutants are absorbed and purified by macromolecules of plant liquid, they become non-toxic and tasteless molecules and are discharged up to the standard. The purification method is energy-saving, environment-friendly, stable and efficient
3. Absorption method: this method is a mature chemical unit operation process, which is suitable for the treatment of VOC containing waste gas with large gas volume and medium concentration
4. Catalytic combustion method: this method is a method that uses the combustibility of VOC for treatment. VOC enters the combustion chamber and is completely burned to generate CO2 and H2O under the conditions of high enough temperature, excess air and high temperature turbulence. The commonly used combustion methods include direct combustion method, catalytic combustion method, etc. According to different situations, more appropriate treatment methods shall be selected in detailed design
5. Catalytic oxidation method: a special treatment method that uses special ultraviolet band (C-band) to break waste gas molecules and further redox under the action of special catalytic oxidant. Waste gas molecules first break organic molecules and break their molecular chains through special band high-energy ultraviolet light waves; At the same time, high concentration ozone is obtained by decomposing oxygen and water in the air. Ozone 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 to greatly improve the speed and efficiency of waste gas treatment, so as to achieve the purpose of purifying waste gas
the five printing plant waste gas treatment methods described above are only commonly used. For the printing plant waste gas, the scheme needs to be designed according to the site, according to the ink production, waste gas emission, waste gas concentration and other parameters.

the waste gas produced by the printing plant has complex components, heavy odor and belongs to flammable and explosive gases. Moreover, if the waste gas is directly discharged into the atmosphere without purification, it will have a great impact on the surrounding environment. I hope the following three Wanchuan environmental protection printing plant waste gas treatment methods will help you deal with the waste gas of the printing plant

1. Absorption method: this method is a mature chemical unit operation process, which is suitable for the treatment of VOC containing waste gas with large gas volume and medium concentration

2. Catalytic combustion method: this method is a method that uses the combustibility of VOC for treatment. VOC enters the combustion chamber and is completely burned to generate CO2 and H2O under the conditions of high enough temperature, excess air and high temperature turbulence. The commonly used combustion methods include direct combustion method, catalytic combustion method, etc. According to different situations, more appropriate treatment methods shall be selected in detailed design

3. Catalytic oxidation method: it is a special treatment method that uses special ultraviolet band (C band) to break waste gas molecules and further redox under the action of special catalytic oxidant. Waste gas molecules first break organic molecules and break their molecular chains through special band high-energy ultraviolet light waves; At the same time, high concentration ozone is obtained by decomposing oxygen and water in the air. Ozone 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 to greatly improve the speed and efficiency of waste gas treatment, so as to achieve the purpose of purifying waste gas

1. Adsorption VOCs
one of the problems that must be solved in waste gas adsorption is the selection of adsorption equipment and the configuration of adsorbent. According to the solid surface characteristics of adsorbent, it has strong adsorption capacity. Select solid adsorbent with large number of holes and large surface area to fully contact with waste gas, and the adsorbent will adsorb waste gas, Thus, the function of purifying waste gas is also achieved. This method is generally applied to the treatment of low and medium concentration VOCs waste gas. Some organic substances with high boiling point and macromolecules can react with adsorbents and produce by-products, so this treatment method cannot be applied
2. Thermal oxidation
this method mainly includes three methods: the first is catalytic combustion, the second is direct incineration, and the third is regenerative oxidation. Catalytic combustion is mainly to transport the waste gas through the pipeline and heat it with the help of the fan. This way is mainly to make the harmful substances oxidize under low temperature conditions with the help of the catalyst, that is, the waste gas burns without flame under the action of the catalyst to generate water and carbon dioxide, It should be noted that more heat will be released during the reaction process, so as to better ensure the purification effect of waste gas. Thermal oxidation is mainly a process in which VOCs are decomposed into harmless organics under the action and influence of high temperature with the help of catalysts. The catalyst can ensure the combustion reaction of harmful gases at very low temperature, and then greatly reduce the energy consumption in the combustion process
3. Plasma oxidation decomposition method
this method mainly uses high-energy electron rays to ionize, activate and decompose different components in waste gas, so as to greatly change their properties and meet the standards and requirements of waste gas emission. This treatment method is generally used in the treatment of waste gas with low concentration, and its operation is convenient, the complexity is not high, the requirements for operation technology are low, and the structure is not very complex, so it is also convenient for management. In the process of equipment application, high investment is not required, and its cost can be effectively controlled in the process of operation. But it also has some shortcomings and deficiencies. In the process of treatment, the solvent can not be effectively recycled, so it also causes a certain waste of resources
4. Membrane separation method
this treatment method is a waste gas treatment method with very significant effect and high treatment efficiency. It mainly realizes its purification effect according to the difference of membrane penetration rate of mixed waste gas under specific pressure. According to the different rates of different substances, it can also successfully complete the gas separation. The mixed gas
is compressed and then put into the condenser for cooling. After condensation, VOCs presents a liquid form, which also provides more convenience for its recovery. After that, the organic waste gas that has not been decomposed by the condenser is separated through the function of membrane, which can ensure that our breathing is smoother and our air is cleaner
in a word, with the acceleration of urban construction in recent years, all kinds of ecological and environmental pollution caused by economic construction and urban development are becoming more and more serious. We must pay special attention to the treatment of urban environmental pollution, actively summarize and learn from the advanced environmental pollution treatment concepts at home and abroad in combination with the current situation of urban development, and accumulate valuable experience for water pollution, air pollution Targeted treatment measures shall be taken for solid waste pollution. At the same time, environmental protection supervision shall be continuously strengthened and investment in environmental treatment shall be increased. While maintaining rapid economic growth, environmental pollution problems shall be solved step by step and measures shall be taken to achieve sustainable development
the above content comes from Yunlan environmental protection ()

as we all know, printing plants will produce a lot of peculiar smell gas when printing products. Being in such an environment for a long time will not only have a serious impact on human body, but also have a certain impact on air pollution. At this time, it is necessary to treat the waste gas
Introduction to the principle of waste gas treatment equipment in printing plant:
the molecules of ink waste gas first break the organic molecules and break their molecular chains through the special band high-energy ultraviolet light wave; At the same time, high concentration ozone is obtained by decomposing oxygen and water in the air. Ozone further absorbs energy to form free molecules with higher oxidation performance and oxidize waste gas molecules. At the same time, a variety of composite catalysts are configured according to different waste gas components to greatly improve the speed and efficiency of ink waste gas treatment, so as to achieve the purpose of purifying the waste gas of printing plant
design principles of waste gas treatment equipment in printing plant:
1. Comprehensively considering the actual situation of the plant, give priority to waste gas treatment equipment with low energy consumption, low operation cost, short construction period, small floor area and simple operation and management
2. The waste gas treatment process shall be safe, reliable, economical and practical
3. Properly dispose the waste gas residue generated in the process to avoid secondary pollution
4. Conscientiously implement relevant environmental protection policies and comply with relevant laws, regulations and standards
5. The plane and elevation layout of waste gas treatment station shall be compact and reasonable to realize functional zoning and facilitate operation management.

at present, there are many processes for treating printing organic waste gas on the market, and the effects are different. Some with better treatment effects are too expensive, which can not be installed in small printing plants, and the cheap treatment effect is not good. If the emission is not up to the standard, they will be punished. Professional printing waste gas treatment, you can learn about the artificial intelligence organic waste gas processor, respect environmental protection, and hope to help you!

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