Pollution control equipment in industry-Electrostatic precipitator (ESP.pptx

An electrostatic precipitator (ESP) is a filtration device that removes particles from a gas stream using an electric charge. It's used to control air pollution by removing dust, smoke, and other harmful particles from industrial processes and power plants

1. Pollution control equipment in industry- Electrostatic precipitator (ESP)

2. Pollution controlling equipments , Electrostatic precipitator Catalytic reactors Scrubbers Biofilters Airfilters Mist collectors

3. Electrostatic precipitator(ESP) ESP is a filtration device which is used to remove fine dust from the flowing gas. It removes particles from a gas stream by using electrical energy to charge particles either positively or negatively. It is the commonly used device for air pollution. Also, used in industries like steel plants and thermal energy plants.

4. Working ESP consists of two sets of electrodes positive and negative. The negative electrodes are in the form of a wire mesh and the positive electrodes are plates. These electrodes are vertically placed and are alternate to each other.

5. The particles present in gas molecules are ionized to a negative charge and attracted to positively charged collector plates. To ionize the medium between the negative and the positive electrode, a certain distance is maintained between the positive, negative electrode and the DC source resulting in a high voltage gradient. The negative terminal of the high voltage DC source is used to connect the negative electrodes, and the positive terminal of the DC source is used to connect the positive plates. The gas borne particles such as ash are ionised by the high voltage discharge electrode by the corona effect.

6. The gas borne particles such as ash are ionised by the high voltage discharge electrode by the corona effect. lternate to each other.            

7. Advantages of electrostatic precipitator: Advantages of electrostatic precipitator The durability of the ESP is high. It can be used for the collection of both dry and wet impurities. It has low operating costs. The collection efficiency of the device is high even for small particles. Disadvantages of electrostatic precipitator Can’t be used for gaseous emissions. Space requirement is more. Capital investment is high. Not adaptable to change in operating conditions .

8. Electrostatic Precipitator Applications Dry ESPs are used in thermal plants to clean the air in ventilation and air conditioning systems. They find applications in the medical field for the removal of bacteria and fungus. They are used in metallurgical industries.

9. Working