Views: 8 Author: Site Editor Publish Time: 2021-08-27 Origin: Site
Environmental protection device-blow molding waste gas treatment
There are many production processes for products, including different processes such as suction molding, compression molding, extrusion, blow molding, injection molding, etc. When processing plastics, heating is required. When the temperature reaches a certain level, harmful gases will be volatilized. Of course, this pollution It is relatively minor, but as long as it is a polluting enterprise that does not install exhaust gas treatment equipment, as long as the exhaust gas discharge does not meet the requirements, it will be subject to complaints from residents or investigation by the environmental protection department
For the harmful components produced in the blow molding workshop, there are mainly two components, one is dust particles, and the other is non-methane total hydrocarbons, styrene, benzene series and other components. The exhaust gas of this component is irritating and more toxic. Low, but the harm to the human body is relatively large. There are two ways to choose from for the treatment of these types of organic waste gas: 1. Carbon adsorption; 2. Photocatalytic oxidation.
1. Carbon adsorption method: The porous structure of the adsorbent (granular activated carbon and activated carbon fiber) is used to capture VOC in the exhaust gas. Pass the VOC-containing organic waste gas through the activated carbon bed, where the VOC is adsorbed by the adsorbent, and the waste gas is purified and discharged into the atmosphere;
2. Photocatalytic oxidation method: Use special ultraviolet band to break exhaust gas molecules and break their molecular chains. At the same time, by decomposing water and oxygen in the air, it becomes ozone or free hydroxyl with high activity, thereby oxidizing exhaust gas molecules , To produce water and carbon dioxide. Adding a catalyst can increase the reaction rate and the efficiency of exhaust gas treatment, so as to achieve the purpose of purifying exhaust gas.
The exhaust gas generated in the blow molding workshop is large or small, mainly based on the type of raw materials used by the customer. If it is a new material, the natural exhaust gas is less, and the simple use of carbon adsorption can solve the exhaust gas emission. For foreign garbage, it is recommended to use multi-stage treatment. First, use carbon adsorption to remove a large amount of dust and macromolecular gas, and then use chemical methods to filter out the pungent gas layer by layer.