Qingguo Intelligent is a leading China packaging film waste gas treatment manufacturer. In the field of packaging film production, packaging film waste gas treatment is a key link related to environmental protection and sustainable development of enterprises. The production process of packaging film involves complex processes, from heating and plasticizing of raw materials, extrusion molding, to possible subsequent printing, lamination and other processes, which inevitably generate a large amount of exhaust gas. These exhaust gases contain various volatile organic compounds (vocs), such as benzene derivatives (benzene, toluene, xylene, etc.), esters (ethyl acetate, etc.), ketones (acetone, etc.), and alcohols, which pose significant hazards.
（1） Environmental hazards
VOCs are important precursors for the formation of photochemical smog and ozone pollution. They undergo a series of complex photochemical reactions with nitrogen oxides under sunlight, producing secondary pollutants such as ozone and peroxyacetyl nitrate (PAN). These pollutants not only reduce atmospheric visibility and affect climate, but also cause damage to ecosystems such as crops and vegetation, such as inhibiting plant growth and reducing crop yields. In addition, some chlorine containing VOCs may also participate in reactions that damage the ozone layer, exacerbating global environmental problems.
（2） Health risks
The harmful substances in packaging film exhaust gas pose a serious threat to human health. Long term exposure to these exhaust gases can damage the hematopoietic and nervous systems, leading to diseases such as anemia, leukemia, and neurasthenia; Esters and ketones may irritate the respiratory tract and skin mucosa, causing coughing, wheezing, skin inflammation, etc; Some high concentrations of VOCs can even cause damage to important organs such as the liver and kidneys, affecting the normal physiological functions of the human body.
（3） Dealing with challenges
Packaging film waste gas has the characteristics of complex composition, large concentration fluctuations, and wide range of air volume changes, which poses great challenges to waste gas treatment. Different production processes, raw materials, and product specifications can lead to differences in the composition and concentration of exhaust gases, thus requiring a highly flexible and efficient treatment solution.
（1） Preprocessing stage
Dust filtration
During the production process of packaging film, some dust particles may be generated. Before the exhaust gas enters the main processing unit, we use efficient bag filters or cyclone dust collectors for dust removal. These devices can effectively intercept larger dust particles, prevent them from entering subsequent processing equipment, avoid blockages or wear on adsorbents, catalysts, etc., and ensure the stable operation of the processing system.
Temperature and humidity regulation
The temperature and humidity of exhaust gas have a significant impact on the subsequent treatment effect. For exhaust gases with excessively high temperatures, we use a heat exchanger to cool them down to a suitable treatment range; For exhaust gases with high humidity, we use dehumidification devices such as condensing dehumidifiers or adsorption dehumidifiers to reduce the humidity of the exhaust gas. Appropriate temperature and humidity conditions can help improve the efficiency of processes such as adsorption and catalysis.
（2） Core processing technology - integrated process of adsorption desorption catalytic combustion
adsorption process
Special activated carbon fiber (ACF) is used as the adsorbent, which has the advantages of large specific surface area, developed microporous structure, fast adsorption speed, and high adsorption capacity. The exhaust gas passes through an adsorption bed filled with ACF under the action of a fan, and VOCs molecules are adsorbed on the surface of ACF under the action of van der Waals forces. We have designed a multi-stage adsorption bed based on parameters such as exhaust gas flow rate and concentration, which can ensure an adsorption efficiency of over 90% and significantly reduce the concentration of VOCs in the exhaust gas.
Detachment process
When the adsorption bed reaches a certain saturation, it is desorbed by hot air or water vapor. The parameters such as desorption temperature and time have been accurately calculated and optimized, which can ensure the desorption effect while avoiding damage to ACF. The high concentration VOCs gas after desorption is collected and sent to the catalytic combustion unit.
Catalytic combustion process
In catalytic combustion devices, precious metal (such as platinum, palladium, etc.) supported catalysts are used. These catalysts have high activity, high selectivity, and good stability. At lower temperatures (200-400 ℃), VOCs undergo oxidation reactions on the catalyst surface, reacting with oxygen to produce carbon dioxide and water. The combustion efficiency of catalytic combustion process is over 95%, and it can effectively reduce energy consumption, avoiding the problem of secondary pollutants such as nitrogen oxides generated by traditional direct combustion method due to high temperature.
（3） Deep processing and purification
Post treatment adsorption
After catalytic combustion, although most VOCs have been removed from the exhaust gas, there may still be a small amount of low concentration harmful substances remaining. To ensure that the exhaust gas meets the emission standards, we have set up a post-treatment adsorption tower and used adsorbents such as activated alumina or molecular sieve for deep adsorption, further removing trace amounts of VOCs and odorous substances.
Tail gas monitoring and compliance with emission standards
At the end of the entire exhaust gas treatment system, advanced online monitoring equipment is installed to monitor the concentration, temperature, flow rate, and other parameters of various pollutants in the exhaust gas in real time. Only when the monitoring data shows that the exhaust gas fully meets the national and local emission standards (such as the Comprehensive Emission Standards for Air Pollutants and other relevant standards), will the exhaust gas be safely discharged into the atmosphere.
（1） Efficient processing effect
By combining the adsorption desorption catalytic combustion integrated process with deep treatment, our solution can effectively remove over 98% of VOCs and other harmful substances from packaging film exhaust gas, ensuring stable and compliant exhaust emissions. It has excellent treatment capabilities for both high and low concentration exhaust gases.
（2） High operational stability
Each device in the system is made of high-quality materials and advanced manufacturing processes, and is equipped with a comprehensive automatic control system and fault alarm system. The automatic control system can automatically adjust the operating parameters of the equipment based on real-time flow rate, concentration and other parameters of the exhaust gas, ensuring the stability of the treatment effect; The fault alarm system can promptly detect equipment failures and notify maintenance personnel, reducing downtime and ensuring the long-term stable operation of the entire processing system.
（3） Energy conservation and environmental protection
In the adsorption desorption process, we minimize energy consumption by optimizing the amount of hot air or water vapor used and the heat recovery system. In the catalytic combustion process, due to the use of efficient catalysts, the oxidation reaction of VOCs is achieved at lower temperatures, saving more than 30% energy compared to traditional combustion methods. At the same time, there is no secondary pollution generated during the entire treatment process, which meets environmental protection requirements.
（4） Tailored solutions
Qingguo Intelligent Technology has a professional technical team that can tailor the most suitable waste gas treatment solution for customers based on the production process, waste gas composition, air volume, and other actual situations of different packaging film production enterprises. Whether it is a small packaging film processing factory or a large production enterprise, we can provide economical and efficient solutions to meet customers' personalized needs.
The packaging film industry is facing increasingly strict environmental requirements. With its advanced waste gas treatment technology and professional services, Qingguo Intelligent Technology provides a green development path for enterprises. We are committed to solving the problem of packaging film waste gas, protecting our common blue sky and white clouds, and contributing to the construction of a beautiful home.
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