Assembly and Drawing Requirements of Commercial Electrostatic Precipitators

The installation process of commercial ESP is mainly divided into three parts: the installation of anode plate, the installation of cathode wire and the installation of vibration system. All commercial ESP fittings should be adjusted before lifting into the electric field, because it is impossible to adjust carefully after lifting into the electric field. Before hoisting into the electric field, the dimensions of each part of the shell should be retested. If the overshoot is found, it should be adjusted. Today, we will talk about the installation of cathode beam.

The cathode wire and frame are assembled on site. After the cathode frame group is aligned, all burrs including the end of the steel tube must be removed to avoid discharging in the electrostatic precipitation work. Before threading, the frame tubes at both ends of the cathode frame must be pre-deformed. After threading, the frame tubes at both ends should be straightened under the action of the tensioner. After threading, the flatness of the cathode frame is less than 10 mm and each cathode line is subjected to a certain tension force. If it is found that individual cathode wires are loose, cathode wires can never be moved into S bends with tools, and should be reworked or cut off. 


Because the cathode frame of commercial ESP is suspended on the large frame of the electric field inlet and outlet, in order to ensure the distance between the same poles, the cathode frame can be hoisted only after the large frame is adjusted in place, and then the screw of the distance can be installed to adjust the limit. After the installation of the anode plate and cathode frame, the distance between different poles must be checked to meet the requirements of the drawings. The distance between different poles will directly affect the boost performance of ESP. Usually, the secondary voltage will increase by U2 (> 2.5KV) for every 10 mm increase in the heteropolar spacing. The channels in the electric field of ESP are parallel, so the narrowing of any channel will affect the boost effect of the whole electric field. From the volt-ampere characteristics of ESP, it can be seen that when the electric field is corona, a small voltage rise will cause considerable current growth. Therefore, the limit deviation between the same and different polar distances of ESP must be less than (+10 mm)