Advantages and disadvantages of electrostatic precipitator
Electrostatic dust removal equipment
Working principle of electrostatic precipitator: The high-frequency electric field is used to ionize the flue gas, and the dust charge in the air stream is separated from the air flow by the electric field. The negative electrode is made of a metal wire of different cross-sectional shape, called a discharge electrode. The positive electrode is made of a metal plate of different geometric shapes, called a dust collecting electrode. The performance of electrostatic precipitators is affected by three factors: dust properties, equipment construction and flue gas flow rate.
Advantages of electrostatic precipitators
(1) High purification efficiency, capable of collecting fine dust of 0.01 micron or more. In the design, different operating parameters can be used to meet the required purification efficiency.
(2) The resistance loss is small, generally below 20 mm water column. Compared with the cyclone, even if the power consumption of the power supply unit and the rapping mechanism is considered, the total power consumption is still relatively small.
(3) The operating temperature is allowed to be high. For example, the SHWB type circuit breaker is preferably allowed to operate at a temperature of 250 ° C, and other types are up to 350 to 400 ° C or higher.
(4) A large amount of processing gas. (5) The automatic operation control can be fully realized.
Disadvantages of electrostatic precipitators
(1) The equipment is more complicated, requiring high level of equipment transportation and installation and maintenance management.
(2) There is a certain requirement for dust specific resistance, so there is a certain selectivity for dust, and it is impossible to obtain high purification efficiency for all dust.
(3) It is greatly affected by operating conditions such as gas temperature and temperature. The same dust is used in different temperatures and humidity. The effect is different. Some dusts work well under a certain temperature and humidity. It is almost impossible to use an electrostatic precipitator due to changes in dust resistance at a temperature and humidity.
(4) One-time investment is large, and the horizontal electrostatic precipitator has a large area. (5) At present, the practical effects of some enterprises do not meet the design requirements.
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