Views: 9 Author: China xicheng Publish Time: 2020-11-23 Origin: China Xicheng
The process of paint spray exhaust gas treatment is divided into pre-treatment stage and post-treatment stage. In the pre-treatment stage, a pretreatment device is used to filter paint mist particles. The filtering equipment can be a wet scrubber or a dry filter.
The post-treatment stage is mainly for the treatment of organic waste gas. According to the discharge amount of waste gas, you can select the appropriate waste gas treatment equipment activated carbon adsorption box waste gas treatment device or a combined process combining the two processes.
The paint spray booth waste gas treatment process, the paint spray booth waste gas treatment equipment needs to be treated in two directions
1. Liquid paint mist;
2. Gaseous VOC; liquid paint mist contains particulate matter and is sticky. If the paint mist is not resolved, the subsequent VOC treatment equipment will easily block
Our company's paint spray booth waste gas treatment process is: spray paint waste gas → pp spray tower paint mist purification activated carbon adsorption box → fan → 15-meter chimney discharges up to standard. After the paint mist purification treatment in the pp spray tower, the paint loses its viscosity and solves the paint mist particles, thereby solving the liquid paint mist. What is left is only the gaseous VOC, which creates a good environment for the subsequent VOC treatment.
The principle of paint mist-exhaust gas separation
Traditional water curtain paint mist removal treatment methods cannot fundamentally solve the problem of paint mist. Whether the paint mist can be effectively separated from the exhaust gas is the key to the success of the project.
The paint mist exhaust gas pretreatment and purification device of the painting line can be used, pp spray tower, the paint mist is suspended in the exhaust gas, when it passes through the pp spray tower (the flow rate of the exhaust gas in the pipeline is about 8.2m/s ), under the action of high-speed spray water, the rotating nozzle (the rotating speed of the nozzle depends on the amount of water and the pressure head), the umbrella-shaped rotating water curtain produced by the hydraulic force is fully mixed with the paint mist, so that the original The paint mist suspended in the gas collides with each other and rapidly gains weight, and finally achieves the purpose of paint mist-exhaust gas separation, and can reduce the VOC concentration by 50-80% and greatly reduce the odor. Paint slag that loses its viscosity enters the circulating water of the spray booth, and the solid waste is regularly salvaged.