Study On Photooxidation Catalyzed Fishmeal Waste Gas Degradation Materials And Devices

Fishmeal is an indispensable protein feed for China's aquaculture industry.As far as the most widely used and mature fishmeal production technology in China is concerned,it is not possible to avoid the generation of odor from the production process.If the waste gas is not treated,it will be nearby.The living population and its living environment cause harm.There are many methods for solving exhaust gas pollution.Photocatalytic technology has become a hot research topic because of its high processing efficiency,low requirements for degradation reaction conditions,sufficient raw materials for catalytic materials,and the ability to oxidize many types of pollutants.Through investigations by a certain equipment manufacturing company in Zhejiang,it is found that the current devices that use photocatalytic technology to degrade fishmeal waste gas have defects such as rapid degradation of catalyst degradation efficiency,severe shortening of the life of lowtemperature plasma tubes,and low utilization of ultraviolet light.Analysis and find the following effective solutions,which have practical significance for promoting fishmeal production.(1)The distance-adjustable quartz glass reaction vessel was designed,and the preparation of uniform large-area(20cm×20cm)titanium-based titanium dioxide nanotube array was effectively realized by double cathode oxidation anode.XRD,SEM and other characterization methods and catalytic degradation experiments of methyl orange solution showed that the anodic oxidation voltage was 30 V and the oxidation time was 2h.The preparation of titanium dioxide sheet photocatalyst was better;the anodization voltage was 40 V,oxidation time Under the condition of 1 h,the preparation of the titanium dioxide network photocatalyst is better.Compared with the current method,the titanium dioxide nanotube array prepared by the method directly grows on the surface of titanium metal,has a large specific surface area,and has strong binding force between the catalyst and the titanium base,and is not easy to fall off in the gas flow and the water flow,and is a cleaning and repeating of the catalytic net.Use to provide the basis.(2)Redesigning the layout between the modules,taking the low-temperature plasma lamp module out of the exhaust gas treatment chamber and forming it into an ozone generator independently,thus avoiding the severe electrochemical corrosion of the metal mesh on the surface of the low-temperature plasma lamp to ensure its normality.Service life.The spray and drainage system is added,and the intermediate product adhered to the catalytic net during the degradation process of the device is effectively removed by periodically flushing the catalytic net,and the adsorption of fishmeal odor components on the surface of the catalyst and the long-term efficient degradation efficiency are maintained.(3)Through the customization of the simplified device and the degradation of trimethylamine,one of the main components in fishmeal waste gas,the synergistic effect and feasibility of photocatalytic degradation of fishmeal waste gas by ozone-bound titanium dioxide nanotube catalyst are demonstrated.