What is corona discharge in electrostatic precipitator?
If the applied voltage is high enough, an electric corona discharge ionizes the air around the electrodes, which then ionizes the particles in the air stream. The ionized particles, due to the electrostatic force, are diverted towards the grounded plates.
Which of the following particulate control device make use of an induced electrostatic charge?
electrostatic precipitator
An electrostatic precipitator (ESP) is a particulate collection device that removes dust and smoke particles from flowing air using the force of an induced electrostatic charge.
How do you get corona discharge?
Corona discharge occurs when the electric field is strong enough to create a chain reaction; electrons in the air collide with atoms hard enough to ionize them, creating more free electrons that ionize more atoms.
What are some of the limitations in using an electrostatic precipitator to control air pollution emissions?
18. What are some of the limitations in using an electrostatic precipitator to control air pollution emissions? The electrostatic precipitator is inefficient for small particles, only 50% efficient for 1 micron particles. Great for all large particles!
What is meant by corona discharge?
corona discharge in Electrical Engineering Corona discharge is an electrical discharge brought on by the ionization of a fluid surrounding a conductor, which occurs when the strength of the electric field exceeds a certain value.
What is corona discharge class 12?
A corona discharge is an electrical discharge brought on by the ionization of a fluid such as air surrounding a conductor that is electrically charged. Spontaneous corona discharges occur naturally in high-voltage systems unless care is taken to limit the electric field strength.
How does a electrostatic precipitator use static electricity?
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. When these fuels undergo combustion, smoke is produced. Smoke consists of tiny particles of soot that are suspended in hot, rising air.
How does a electrostatic precipitator work?
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 is the function of corona discharge in extrusion process?
Corona treating increases the surface energy of plastic films, foils, paper and polymer objects to improve wettability and adhesion of inks, coatings and adhesives. Treating works best when a substrate is treated at the time of extrusion and in-line prior to converting.
What is corona discharge or action of points?
The positive ions are repelled at the sharp edge and negative ions are attracted towards the sharper edge. This reduces the total charge of the conductor near the sharp edge. This is called action at points or corona discharge.
How do electrostatic precipitator reduce air pollution?
The electrostatic precipitator works by removing particles and smoke from a gas stream using an electrostatic charge. Introducing a water spray can reduce the electrical resistance of the dust particles, allowing them to accept the charge more easily.