Chemical fiber waste gas treatment technology with efficient odor removal
Chemical fiber printing and dyeing waste gas purifier efficiently removes sulfides and VOCs and protects a clean environment.
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Solution maturity
Early adoption / Process verification
Cooperation methods
Applicable industry
Applications
Key innovations
The innovation of this product is that it combines plasma and UV photolysis technology to efficiently decompose a variety of harmful waste gases, generate ecological oxygen, and achieve deep purification and particulate matter adsorption and sedimentation.
Potential economic benefits
Reduce waste gas treatment costs, avoid environmental fines, enhance corporate green image and market competitiveness, and promote sustainable development.
Potential climate benefits
This technology decomposes volatile organic compounds (VOCs) in chemical fiber printing and dyeing waste gas into carbon dioxide and water through plasma and UV photolysis. Although carbon dioxide is produced, many VOCs are strong greenhouse gases or their precursors, with a potential impact on the atmospheric greenhouse effect and ozone layer destruction far greater than the equivalent amount of carbon dioxide.
Solution supplier
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Shanghai Qisalo Environmental Protection Technology
Shanghai Qisalo Environmental Technology focuses on providing leading environmental protection technologies and solutions for applications in water treatment, air purification and other fields.
Aksu Prefecture，China
Solution details
- Technical background
The waste gas from the chemical fiber printing and dyeing industry mainly comes from two aspects: one is the spinning technology of chemical fiber, and the other is the pretreatment and functional finishing processes of textiles. Taking the spinning technology of viscose fiber and chemical fiber as an example, raw materials need to be made into spinning solution first, and a lot of carbon disulfide needs to be added in the process of making spinning solution. Therefore, the spinning process will release hydrogen sulfide, carbon disulfide, and sulfur dioxide. The main harmful gaseous substances. Heat setting machine treatment is an important part of textile pretreatment technology. During heat setting, various dye additives and coating additives on textiles will be released, so after all, many VOCs (organic volatiles) will be released at the outlet of the exhaust pipe. These organic gases are mainly organic gases such as formaldehyde, polybenzenes, and aromatic hydrocarbons.
In the functional finishing process of textiles, exhaust gas mainly comes from two links. In the hot melt dyeing technology of polyester disperse dyes, high temperature causes some small molecule dyes to sublimate into waste gas and be emitted. The non-ironing and flame-retardant cleaning of cotton fabrics must go through the baking process. Due to the addition of some chemical additives, formaldehyde and other aldehyde gases and ammonia gas will be released during baking. - Technical principles
Textile printing and dyeing treatment process: textile printing and dyeing waste gas → pretreatment equipment (dust particle removal and filtration, atomization spray tower, water vapor separator, high temperature cooling and other equipment) → plasma UV photolysis deodorization waste gas purifier → high emission. Working principle of the plasma UV photolysis deodorization exhaust gas purifier: 1. Pulsed high-frequency and high-voltage plasma power supply and dual dielectric toothed plate discharge equipment are mainly used, and high-concentration ions are generated in a cutting-edge discharge method. Plasma is an aggregated substance. Its high-energy electron energy can penetrate air and exhaust gas molecules in an instant in milliseconds, and a series of differentiation and cracking reactions occur, causing active free radicals with high concentration, high intensity, and high energy. When they collide with molecules in exhaust gas, a series of elementary physical and chemical reactions will occur, and a variety of active free radicals and ecological oxygen are generated during the reaction process, that is, atomic oxygen caused by ozone differentiation. Active free radicals can usefully damage nucleic acids and proteins in various viruses and bacteria, making them unable to undergo normal metabolism and biosynthesis, and then cause them to die; while ecological oxygen can quickly differentiate or reduce organic waste gas molecules, odorous gases into low-molecular harmless substances; in addition, by virtue of the polymerization and adsorption effect of ions and objects in the plasma, fine organic waste gas particles as small as submicron can be used for useful adsorption and sedimentation treatment. 2. Use a special high-energy UV ultraviolet beam to irradiate the odorous gas, crack the molecular bonds of the odorous gas, and degrade it into low-molecular chemicals such as carbon dioxide and water. 3. Use high-energy ozone to decompose oxygen molecules in the air to produce free oxygen, that is, active oxygen. Because the positive and negative electrons carried by free oxygen are unbalanced, it needs to be combined with oxygen molecules to generate ozone, so that the pollutant molecules in a free state can be oxidized and combined into small molecules that are harmless or low-harm compounds. Such as CO2, H2O, etc. UV O2→O- O*(Reactive oxygen species) OO2 →O3(ozone).
Last updated
09:29:53, Nov 05, 2025
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