How does a precipitator work?
Description. An electrostatic precipitator (ESP) removes particles from a gas stream by using electrical energy to charge particles either positively or negatively. The charged particles are then attracted to collector plates carrying the opposite charge.
What are the main parts of a precipitator?
The main components of an ESP consist of collecting electrodes/plates, discharge electrodes, inlet and outlet perforated screens, insulators for the discharge electrodes, rappers, and one or more electrical transformers.
What is ESP diagram?
The small scale of ESP is being used in the diesel engine in order to trap the particulate matter (PM). The dimension of the small scale ESP model is based on the calculation in order to get more than 90% of the efficiency. The model consisted of a rectangular collection chamber.
What is a precipitator in a power plant?
An electrostatic precipitator is a type of filter (dry scrubber) that uses static electricity to remove soot and ash from exhaust fumes before they exit the smokestacks. This one common air pollution control device. Most power stations burn fossil fuels such as coal or oil to generate electricity for use.
What is ESP used for?
ESP may be used to ensure confidentiality, the authentication of data origins, connectionless integrity, some degree of traffic-level confidentiality, and an anti-replay service (a form of partial sequence integrity which guards against the use of commands or credentials which have been captured through password …
What is rapping system?
A rapping device system is a special product for cleaning horizontal superheater paths, especially for waste, biomass and industrial plants. Rapping device systems can be applied to remove deposits from the heating and reaction surfaces without any additional cleaning medium like steam, air or water.
What is back corona?
Back corona, the migration of positive ions generated in the fly ash layer towards the emitting electrodes, which neutralize the negatively charged particles, will result if the ash resistivity is greater than 1012Ωcm.
What is rapping system in ESP?
Rapping is the process by which electrodes and particles are broken apart by vibrations from the rappers. Often used in electrostatic precipitators, rappers relapse the caked on dust layer which then descends into a hopper.
What is discharge electrode?
Discharge electrodes (DE) emit charging current and provide voltage that generates an electrical field between the discharge electrodes and the collecting plates. The electrical field forces dust particles in the gas stream to migrate toward the collecting plates.
What is the size of a precipitator?
The most basic precipitator design consists of a row of thin vertical wires and a stack of large flat vertical metal plates. The plates are spaced from less than 0.5 inch (1.3 cm) to about 7 inches (about 17.8 cm) apart, depending on the application.
How does an electrostatic precipitator work?
The electrostatic precipitator functions by charging particulates within a gas stream as the gas flows through the ESP. These negatively charged particulates are attracted to positively charge large flat plates within the ESP, where they gradually accumulate upon the surfaces of the plates.
What is a plate precipitator?
Plate precipitator: This is the most basic precipitator type that consists of rows of thin vertical wires and stack of vertically arranged large flat metal plates that are placed at a distance of 1cm to 18cm apart. The air stream is passed horizontally through the vertical plates and then through the large stack of plates.
What are the different types of precipitators?
Following are the three types of ESPs: Plate precipitator: This is the most basic precipitator type that consists of rows of thin vertical wires and stack of vertically arranged large flat metal plates that are placed at a distance of 1cm to 18cm apart.