Electrostatic Precipitator (ESP) Manufacturers in India

Electrostatic precipitator (ESP) working principle

Electrostatic precipitator working principle involves ionization of air by applying high voltage to collect the fine soot or dust and oil particles in the smoke and thus filter the air. In an ESP, polluted air passes through two electrodes. These electrodes can be built in the form of bars or plates which are placed inside a pipe. The shape of the electrodes varies according to the type of ESP used. One of these electrodes is charged with negative voltage which passes on the negative charge to particulates in the smoke passing through the unit. The other electrode situated further along the pipe is charged with positive voltage. The negatively charged particles are attracted to this electrode and stick to it. The plates used in ESPs can be easily washed and cleaned for reuse.

ESP design

When designing the equipment, ESP manufacturers will typically consider a number of process variables. These include:

• The size and distribution of particles
• Gas flow rate
• Resistivity of the particles
• Gas temperature
• Chemistry of the particle

Despite the simplicity of esp working principle in theory, ESP manufacturers as well as users are aware that ,any factors influence the practical working of an electrostatic precipitator. These include the temperature of the ESP, the velocity of gas steam passing through the precipitator, concentration of particles at a point, etc. The amount of moisture in the gas plays a role in determining the effectiveness of the ESP. Close consultation with the ESP manufacturers is necessary even in the initial days of operation of the unit.

ESP working principle for wet electrostatic precipitator

SFS is a market leader among wet electrostatic precipitator manufacturers in India. ESP working principle for wet electrostatic precipitators is similar to dry ESP. In a wet ESP, the gasses are conditioned to take them near saturation point so that they become more conductive for charging b through water-spraying. The material then passes through electrodes bearing negative charge. When the charged particulates arrive at collection point, they are cleared off with a flushing water rather than a mechanical rapping process. In a wet ESP working principle, the collection point is continuously kept in a wet condition to prevent agglomeration of material. Due to the wet environment in such equipment, ESP manufacturers use corrosion-resistant materials like stainless steel or special alloys to fabricate these ESPs.

Due to its wet interface, a wet electrostatic precipitator is better able to trap particulates that are sticky. Its different ESP working principle also allows it to efficiently collect particulates present in gas steam which is near the point of saturation. Wet ESPs are also capable of catching sub-micron particles with acid mist. ESP working principle of wet ESPs ensures low outlet emissions, lower risk of fire, and are more sustainable. They effectively trap sticky dust and reduce greenhouse gas pollution more efficiently.