The XSC spiral umbrella electrostatic precipitator is a secondary dust removal equipment used in cement industry dryers, suitable for dust removal of clay, coal, iron powder, slag, etc. It consists of four vertical metal cylindrical bodies as the main part of electrostatic dust collection. The inner wall of the cylinder is equipped with multiple umbrella shaped dust collectors without tops, and the center of the cylinder is equipped with a spike corona wire. A spring protection device is installed at the connection between the corona wire and the lower part. This structure of the dust collector does not produce secondary dust, and the dust collection efficiency reaches 99.8%. It also has a long service life and good dust collection effect.

XSC type spiral umbrella electrostatic precipitator can be laminar or turbulent flow. The trajectory of dust particles under laminar flow conditions can be regarded as the vector sum of airflow velocity and driving velocity. Only when dust particles accidentally enter the laminar boundary zone where Coulomb force can act, can they be captured. At this point, the dust particles passing through the electrostatic precipitator cannot choose their path of movement, nor can they choose the location where they enter the boundary zone. It is highly likely that they will directly pass through the electrostatic precipitator without entering the boundary layer. In this case, it is obvious that dust particles cannot be collected by dust collection. Therefore, whether dust particles can be captured should be considered a probability issue. For a single particle, the dust collection efficiency is either zero or 100%. The probability of capturing dust particles in electrostatic precipitator is the dust collection efficiency.

Compared with other dust removal equipment, the XSC rotary umbrella electrostatic precipitator consumes less energy and is suitable for removing dust from flue gas. It can also be used in situations with high flue gas temperature and pressure. Practice has shown that the larger the amount of flue gas processed, the more economical the investment and operating costs of using a rotary umbrella electrostatic precipitator.

In the XSC rotary umbrella electrostatic precipitator, dust particles with different charges move towards different electrical directions under the action of electric field force. A portion of charged dust particles in the corona zone and in close proximity to the corona zone have opposite properties to the corona, so they deposit on the corona. The corona discharge area has a small range and a small number of captures. The majority of dust particles in the corona discharge zone carry the same corona charge, so when these charged dust particles approach the dust collection surface, they deposit on the plate and are captured. The capture of dust particles is related to many factors. Such as the specific resistance, dielectric constant, and density of dust particles, the flow rate and temperature of gases, the volt ampere characteristics of electric fields, and the surface state of dust collection. It is impossible to theoretically express the influence of every factor, therefore, in the process of capturing dust particles in electrostatic precipitators, the influence of each factor needs to be determined based on experiments or experience.