The exhaust gas first passes through a dry filter to remove dust and impurities, and then uniformly passes through an activated carbon adsorption bed. The pollutants in the exhaust gas are adsorbed on the surface of the activated carbon, and the purified gas is discharged through a chimney to meet the standard. Activated carbon desorption regeneration and catalytic combustion process: When adsorption reaches saturation, regeneration is carried out through valve switching. Hot air is sent into the adsorption bed to heat the activated carbon. Activated carbon is heated to release high concentrations of organic gases, which are introduced into the catalytic combustion bed by a desorption circulation fan. The exhaust gas is catalytically burned to generate harmless gases such as carbon dioxide and water, as well as some heat. Heat is reused for the desorption and regeneration of activated carbon in the adsorption bed. The entire adsorption and catalytic combustion process is automatically controlled by a PLC system.
1. It can simultaneously remove multiple organic pollutants and has the advantages of simple process flow, compact equipment and reliable operation;
2. High purification efficiency, generally reaching over 98%;
3. It has the advantage of low operating costs, and its heat recovery efficiency can generally reach over 95%;
4. The entire process produces no wastewater, and the purification process does not produce secondary pollution such as NOx;
5. It can be used in conjunction with an oven, and the purified gas can be directly reused in the oven heating equipment, achieving the goal of energy conservation and emission reduction.
6. Install 5 safety devices to prevent accidents from occurring.
7. The electric heating system works in sections, automatically tracks temperature and has a built-in heat storage device, saving energy and electricity.
8. By adopting a combination process of adsorption concentration and catalytic combustion, the entire system achieves a closed cycle of purification and desorption processes, without generating secondary pollution during operation, and with low equipment investment and transportation costs.
9. The PLC control system realizes the interlocking control of activated carbon adsorption bed and catalytic oxidation equipment, electric heating power, flue gas outlet damper control, fan, furnace temperature, pressure, wind direction switching valve signal, etc., and centrally monitors or controls important operating parameters. The control layer is mainly composed of PLC and its system, which receives data information from the site, and after its own calculation and processing, sends corresponding instructions to control the on-site equipment; At the same time, analyze and handle all faults that occur in the on-site equipment in a timely manner, reflect the fault information on the touch screen in real time, and respond with alarm prompts.
10. The main control cabinet is equipped with a main power switch (with thermal overload, electromagnetic overload, phase error protection function, feedback output point, uploaded to the PLC system), which can be manually set. The power indicator light is set on the control cabinet panel. The control cabinet adopts cable trays for incoming and outgoing lines. The top or bottom of the control cabinet provides power and control power to all equipment in the control system. All control cabinets are equipped with door switches and lighting fixtures. Cable trays are used inside the cabinet, and galvanized cable trays are used outside the cabinet for wiring.
