When were electrostatic precipitator invented?
The first patent for the electrostatic precipitator was issued on August 11, 1908. The precipitator was soon at work, removing the acid mist from the stack gases of the sulfuric acid plant.
Are electrostatic precipitators environmentally friendly?
At its most basic, an electrostatic precipitator is an air purification tool that uses electrostatic force to grab and hold dust and other particles. The particles that have been collected are then shaken loose, scraped off, or washed away, and disposed of in a safe and environmentally-friendly manner.
Who developed the electrostatic smoke precipitator?
Frederick Gardner Cottrell
In 1824 M. Hohlfeld, a mathematics teacher in Leipzig, first described the precipitation of smoke particles by electricity. The first commercially successful process was patented in 1908 following experiments by American chemist Frederick Gardner Cottrell at the University of California, Berkeley.
How are particles removed in ESP?
Description. 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 corona in electrostatic precipitator?
An electric field is established between the discharge and collecting electrodes, and the discharge electrodes will exhibit an active glow, or corona. As the flue gas passes through the electric field, the particulate takes on a negative charge. Corona on a high-voltage ESP wire.
What is back corona?
Back corona is caused by the electrical breakdown of gas in the dust layer. This breakdown produces positive ions, which drift toward the negative discharge electrode. The presence of ions with opposite polarity causes a reduction in the particle-charge and -collection efficiency.
What are the disadvantages of electrostatic precipitator?
Electrostatic precipitators have a high initial capital cost, which makes it prohibitive for small-scale industries. They are expensive to purchase and install. In addition to being costly, they require large space to be set up.
What are the advantages and disadvantages of electrostatic precipitator?
Electrostatic Precipitators Information
| Advantages | Disadvantages |
|---|---|
| Very high collection efficiencies, even for very small particles. | Cannot control gaseous emissions |
| Can handle corrosive materials, wet materials, and high temperatures. | Very dependent on the electrical resistivity of the particulate. |
What is electrostatic smoke precipitator?
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. This one common air pollution control device. Most power stations burn fossil fuels such as coal or oil to generate electricity for use.
How does an electrostatic precipitator reduce 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.
What is Cottrell smoke precipitator?
Smoke is a colloidal solution of carbon, arsenic compounds, dust etc in air, These carbon particles are precipitated in direct contact with oppositely charged metallic plates for separation in smoke and the gases which evolved from the chimney are smokeless. This precipitation is called Cottrell smoke precipitator.
When was the first electrostatic precipitator invented?
They are used in industries like steel plants, thermal energy plants. In the year 1907, chemistry professor Frederick Gardner Cottrell patented the first electrostatic precipitator that was used to collect sulphuric acid mist and lead oxide fumes that were emitted from various acid-making and smelting activities.
How are collector plates cleaned in an electrostatic precipitator?
In dry ESPs, the collector plates are cleaned by applying mechanical impulses or vibration to the plates, which knocks loose the collected particulate matter (referred to as rapping). In wet ESPs, the collector plates are cleaned by rinsing with water.
How does an electrostatic precipitator ( ESP ) work?
Monitoring by Control Technique – Electrostatic Precipitators. Description. 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.
Which is the best electrostatic precipitator PowerPoint presentation?
Electrostatic Precipitator Description: velocity distribution can be modified by using flow control devices and baffles Baffle Chamber. Mechanical Collectors. Particulate Wet Scrubbers – PowerPoint PPT presentation Number of Views:3149 Avg rating:5.0/5.0 Slides: 20 Provided by: sumeshdu Category:
