Electrostatic precipitators (ESPs) are basically filtration devices designed to remove minute particles like smoke and dust from exhaust gas systems in a bid to ensure a clean environment. These devices are quite large ones and various industries use them for the above roles. While the machinery is quite popular in industrial circles, there is, in fact, a very small population that knows about electrostatic precipitators. Discussed below are the finer details about how an ESP works, its applications, and what the benefits are of these large machines.
Key Points to Know About Electrostatic Precipitators
- Uses and Applications
Electrostatic Precipitator is widely used by steam and thermal power plants to get rid of fly-ash from the utility boiler emissions. With ever-growing stringency imposed by governments to ensure that the air is as pollution-free as possible, the demand and use of ESPs are on a constant rise. They are often used as the primary source of smoke and dust collection, but in some cases, ESPs play second fiddle to cyclone collectors. This is because there are some minor limitations to ESPs when it comes to filtering high amounts of carbonated gases.
- How does it Work
The dusty gases are ionised when passed through oppositely charged conductors under high voltages of around 30-60kV. This passing through the charged electrodes creates positive and negative ions. The ionised gas is then passed through a collecting unit that comprises metallic plates, which are charged and earthed alternatively. As these plates are grounded, highly intense electrostatic fields exert a force on the dust particles that are positively charges which are driven towards the ground plate. The particles thus deposited on the plates are gotten rid of by shaking the plates with the help of externally driven cams, and the particles removed are finally collected in dust hoppers.
The obvious benefit of an electrostatic precipitator is the betterment of the environment by reducing the pollutant emissions of various factories. It is also the preferred choice for various industries due to the fact that the maintenance costs are lower compared to other collecting systems. The ease of installation and operation of these machines are another point in the favour of ESPs. They collect the dust particles in a dry form, but it can be removed in either wet or dry forms.
These are some of the most important things to know about electrostatic precipitators. With the added emphasis on green and clean solutions for the environment, the application of these machines is soaring.