Air Pollution Control

Electrostatic Precipitator, Its applications, Advantages, at Industrial Zones in India

According to world Health Organisation 2015 report, around 7 million premature deaths take place due to air pollution.

And 10 thousand people are dying at the age of around 40 because of toxic fumes. Thousands of children become asthma patients at the age of six only.

And according to a forecast according to the Constance growth of dying, by the year of 2050, there must be a scarcity of pure drinking water due to the lack of sanitation.

The most air polluted “hotspots” have been found in the biggest metropolitan cities, rather can say, the industrial areas of the most metropolitan cities in this country.

According to another statistical report air has been polluted due to cheap and poor quality supply of coal in most industrial areas. And this leads to India being  one of the leading pollutant regions in the whole universe.

The Big Smoking Zone of the Country:

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Industrial areas are the backbone of every country. So, before thinking  to stop industrialization, that is the most common thinking of masses, think pragmatic to reduce pollution without getting hazard the industry and their prosperity.

Lack of exposure to sunlight children get affected in rickety or various bone deficiency diseases as the smog in air of these areas block sunlight. A permanent smoke haze has already enveloped some areas of Delhi, Patna, Gwalior and Raipur.

According to the “smoke control laws in India” apart from banning tobacco smoking in public zone or creating an extra smoking zone in railway stations or airports, it is mandatory to install Electrostatic Precipitator in every industrial zone of this country.

A little talk about Electrostatic Precipitator.

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It has been used from 1900 and was first initiated by Dr. Frederick G. Cottrell in 1907. Now it is widely acclaimed by every industrial and commercial areas in India as the most proficient machinery that purifies air.

Application of Electrostatic Precipitator:

Apart from the various advantages, this apparatus works in the most proficient way to reduce toxic levels of the environment. It has potential to take away 99.9% of dust particles that is very beneficial for the welfare of eliminating health hazards.

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Advantages of Electrostatic Precipitators

  • Manages massive gas level and dust, especially smog with less pressure
  • Can easily systematize mordant and wet equipment
  • Low expenses
  • It can last for several years
  • Hassle-free upholding
  • Collection efficacies even for tiny elements

Key Components of Electrostatic Precipitator Include

  • Release electrodes
  • Precipitator control
  • Wash out air systems
  • High voltage power supply
  • Spray washing systems

Layout of Electrostatic Precipitator

The preliminary cost of this equipment is quite expensive, when you purchase it for the first time. But, the best part is, its maintenance cost is very cheap and reasonable. The classification is recognized for its permanence and will surely last for several years. One of the best things about ESP is that you don’t need to purchase substitute filters. On the other hand, the ion charged plates has to be cleaned from time to time automatically for optimal performance. Electrostatic precipitator provides almost no wind resistance and doesn’t require any form of pushing control unlike other models.

 

In conclusion, what need to talk about, after giving the detail aspects of this must need equipment is, it is the most fundamental job to install it in all industrial zone. And we need to know its reimbursement in a vast level.

 

Electrostatic Precipitators: Way to Kill Industrial Flue Gas

industrial air pollution

Okay, ‘electrostatic precipitator’ is way too technical. Let’s call these machines the scrubbers. They are inherently static-electricity filters, designed to steal dust, soot, ash, and grime from industrial smoke. It goes without asking that they contribute to the minimisation of air pollution. Yes, they are a technological marvel.

Want To Know How A Scrubber Works?

Comb your hair vigorously on a cold, dry day, You’ll notice that the strands cling on to the teeth of the comb. Well, that’s static electricity.

ESPAs the comb rubs against your tresses repeatedly, the electrons break free from them and settle on it instead. At this point of time, your hair is positively charged and the comb negatively. This explains the weird attraction.

Something of the like happens in a scrubber as well. Industrial smoke is actually an aerosol. It may look like gas, but the properties are different. That’s solid suspended in a gaseous medium. The suspended particles are unburned carbon.

The idea is to ‘rub’ the particles so that they receive an electrical charge. These when passes through a medium with the opposite charge, can be pulled out and removed.

Simple, right? Wrong.

There’s more.

Industrial smoke, aka flue gas, is forced through two electrodes inside a smokestack. The negative electrode imparts negative electrical charge to the suspended particles. The second electrode is the positive one and located up or beyond the negative electrode. They attract the charged particles.

Until this point, it is more or less similar to the hair strands attaching to the comb. However, the challenge is to get rid of the pulled particles from the electrode, which is also known as the collector plate.

It needs to be shaken from time to time so that the older particles are emptied and there’s room for newer particles. This can be done manually by brushing or, automatically using an automated shaker or rapper, after which, the particles are disposed of.

ESP at a industry

What Are The Typical Activities Of A Scrubber?

If we go by the above explanation of how a scrubber works, here are the six typical activities that take place inside it:

1. Ionisation – The particles are charged.
2. Migration – The particles are taken to the collector plate.
3. Collection – The particles are collected onto the collector plate.
4. Neutralisation – The particles are neutralised on the collector plate so that they fall.
5. Dislodging – The particles are dislodged onto a hopper.
6. Removal – The particles are carried from the hopper for disposal or recycling.

Which Particulate Properties Affect Electrostatic Precipitators?

Various electrostatic precipitators are designed for particles of various sizes, chemical compositions, and amounts. Here are the two most important aspects of suspended particles that normally affect these scrubbers:

• Electrical resistivity
• Particle size distribution

Other aspects include:

• Temperature of the flue gas
• Its moisture content
• Overall design of the machine
• Whether the rapper is manual or automated
• Whether single-stage or multi-stage scrubbing
• Whether the removed particles should be disposed of or recycled.
• Heterogeneity of the pollutants that the flue gas contains

So, now that you know the scrubber inside out and the loads of environmental benefits it brings, why not have it installed in your industrial plant as well? Like they say, let the machine take care of the machine while we enjoy a good life.