All internal components should be adjusted before the electric field is hoisted because it cannot be finely adjusted after the electric field is hoisted. Before the electric field is hoisted, the dimensions of each part of the casing should be re-tested. If it is found to be out of tolerance, it should be adjusted. The installation of the inner part is mainly divided into three parts: the installation of the anode plate, the installation of the cathode line and the installation of the rapping system.
- Anode board installation
Since the maximum length of the plate is more than 15m, it is easy to deform. Before the discharge of the plates, the flatness of each plate should be checked, and the adjustment should be made on the ground when the difference is exceeded. When pairing, the whole row of plates and the plate suspension beam must be arranged vertically. The upper and lower sides should meet the requirements of the drawings, and the bolt direction and gasket position should be noted. The upper and lower end fixing bolts of the plates must be tightened with a torque to tighten the bolts to the specified torque (135 Nm). If the tightening force is not reached, it will affect the vibration transmission effect of the anode plate, affecting the cleaning, and the dust collection efficiency will be reduced when the ash accumulation is serious.
2. Installation of cathode wire beams
Both the cathode line and the frame are assembled on site. After the cathode frame group is paired, all the burrs including the end of the steel pipe must be removed to avoid discharge during the electric dust removal work. The frame tubes at both ends of the cathode frame must be pre-deformed before threading. After threading, the frame tubes at both ends should be pulled down by the tensioner.
After the anode plate and cathode frame are installed, the distance between the poles must be checked to meet the drawing requirements. The size of the different pole spacing will directly affect the boost performance of the electrostatic precipitator. Generally, for every 10 mm increase in the pitch of the poles, the secondary voltage will increase by ΔU2 ≥ 2.5KV. The channels in the electric field of the electrostatic precipitator are connected in parallel, so the narrowing of any one channel will affect the boosting effect of the entire electric field. From the volt-ampere characteristics of the electrostatic precipitator, it can be seen that when the electric field is stunned, a small voltage rise will cause a considerable current increase. Therefore, the limit deviation of the electrostatic precipitator from the pole distance and the different pole distance must be less than ±10mm.
3. Rapping system installation
The accuracy of the installation of the rapping system determines the effect of the entire electric field rapping. If improperly installed, it is easy to cause dust accumulation in the plates and the pole lines, resulting in a smaller electric field current and a lower dust collecting effect. Therefore, it is necessary to ensure the relative position of the rapping hammer and the rapping anvil. After the installation, the bolts must be welded to avoid the bolts falling off during the operation of the electrostatic precipitator, which may cause the rapping hammer to fall off, thus affecting the rapping effect.
The installation quality of the internal components directly determines whether the ESP can be efficient, stable and long-term operation, and should be highly valued.