Catalytic combustion equipment is a typical gas-solid catalytic reaction, its essence is the deep oxidation of active oxygen. In the process of catalytic combustion, the role of catalyst is to reduce the activation energy, and the catalyst has adsorption on the surface, which makes the reactant molecules accumulate on the surface, improves the reaction rate and accelerates the reaction speed.
With the help of the catalyst, the organic waste gas can be ignited at a low temperature without flame, oxidized and decomposed into carbon dioxide and water, and released a lot of heat energy at the same time, so as to achieve the method of removing harmful substances in the waste gas.
在将催化燃烧过程中废气,废气管道通过风扇进入换热器,热气体催化燃烧点火温度需要,通过催化剂床层,让它燃烧,但由于存在催化剂,催化燃烧的点火温度250 - 300℃,远低于直接燃烧法的燃烧温度650 - 800℃,因此远低于直接燃烧法对能源消费。
In the process of catalytic combustion, the exhaust gas enters the heat exchanger through the fan. The ignition temperature of hot gas catalytic combustion needs to pass through the catalyst bed to make it burn. However, due to the presence of catalyst, the ignition temperature of catalytic combustion is 250-300 ℃, far lower than the combustion temperature of direct combustion method of 650-800 ℃, so far lower than the energy consumption of direct combustion method.
The desorption time and desorption cycle can be determined according to the use situation. Generally, the desorption time of a carbon box is 5-10 hours, and the cycle desorption time is 10-15 days. The activated carbon bed adsorbing organic waste gas can be desorbed and regenerated with the waste gas after catalytic combustion, and the desorbed gas can be sent to the catalytic combustion chamber for purification. Noble metal catalyst and ceramic honeycomb are used in the catalytic combustion chamber, with small resistance and high activity. When the concentration of organic steam reaches more than 2000 ppm, it can keep spontaneous combustion, fully automatic control, convenient operation and maintenance.
The adsorption operation can be carried out simultaneously or independently, and the organic waste gas with large air volume and low concentration can be concentrated into the organic waste gas with small flow and high concentration. The concentrated high concentration gas is connected to the regeneration catalytic combustion equipment for oxidation treatment, i.e. the activated carbon is regenerated to restore its adsorption capacity. Regeneration cannot be carried out at the same time, only one adsorbent can be removed at a time.
After pretreatment, the waste gas of painting is pumped by fan and extracted by air duct. After preliminary purification, the gas enters the active carbon adsorbent. The organic gas is absorbed by the activated carbon, and the gas is purified.
In order to avoid secondary pollution and protect the activated carbon, each adsorption unit is equipped with a paint mist membrane filter to pretreat the paint mist. The fog film filter adopts multi-layer composite flame-retardant glass fiber, with the density and thickness increasing gradually. As a supporting angle, the paint mist particles are included in the material after being filtered and intercepted by a layer of multi-layer fiber of different materials, such as collision, diffusion and absorption. In order to avoid the influence of too many paint mist particles on the filtering effect, The paint mist filter is equipped with pulse dust removal device, which can blow dust regularly to remove dust from the paint mist filter, and its work is reliable.
The above is a detailed introduction of how the catalytic combustion equipment meets the waste gas treatment standard. For more information, please click http://www.yinyehuanbao.com/