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A method and a device for cleaning an electrostatic precipitator

An electrostatic precipitator and cleaning technology, applied in chemical instruments and methods, electrode cleaning, electrostatic separation, etc., to achieve simple and robust control effects

Inactive Publication Date: 2014-07-30
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the back-corona effect can still affect the operation of the ESP in an adverse manner

Method used

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  • A method and a device for cleaning an electrostatic precipitator
  • A method and a device for cleaning an electrostatic precipitator
  • A method and a device for cleaning an electrostatic precipitator

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Embodiment Construction

[0031] figure 1 It is a schematic side view and shows the power plant 1 viewed from its side. The power plant 1 includes a coal-fired boiler 2. In the coal-fired boiler 2, coal is burned in the presence of air to generate hot process gas in the form of so-called flue gas 3, which leaves the coal-fired boiler 2 via a duct 4. The flue gas 3 generated in the coal-fired boiler 2 includes dust particles, which must be removed from the flue gas 3 before the flue gas can be released to the atmosphere. The duct 4 conveys the contaminated flue gas 3 to the electrostatic precipitator ESP6, which is located downstream of the boiler 2 with respect to the flow direction of the flue gas. The ESP 6 includes objects commonly referred to as the first field 8, the second field 10, and the third field 12, which are arranged in series as seen with respect to the flow direction of the flue gas 3. The three fields 8, 10, 12 are electrically insulated from each other. Each of the fields 8, 10, and...

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Abstract

A method of cleaning at least one collecting electrode of an electrostatic precipitator comprises applying, in a first mode of operation, a first average current between at least one discharge electrode and at least one collecting electrode, and switching from the first mode of operation to a second mode of operation in which a second average current is applied between the at least one discharge electrode and the at least one collecting electrode, the second average current being a factor of at least 3 higher than the first average current, to achieve a forced cleaning of the at least one collecting electrode.

Description

Technical field [0001] The present invention relates to a method of cleaning at least one collector electrode of an electrostatic precipitator, which is operated to remove dust particles from a process gas and includes at least one discharge electrode and at least one collector electrode. [0002] The invention also relates to a device for operating at least one collecting electrode of an electrostatic precipitator. Background technique [0003] In the combustion of fuels (such as coal, oil, peat, waste, etc.) in combustion plants (such as power plants), hot process gases are generated, which contain dust particles in addition to other components, sometimes called fly gray. Dust particles are usually removed from the process gas by means of an electrostatic precipitator (also called ESP, for example of the type shown in EP2078563). [0004] A problem associated with ESP is the so-called negative corona effect, that is, the high resistivity of the layer of collected dust particles o...

Claims

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Application Information

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IPC IPC(8): B03C3/74B03C3/66B03C3/41B03C3/45
CPCB03C3/41B03C3/45B03C3/66B03C3/74B03C2201/24B03C3/763B03C3/765
Inventor A.贝克
Owner GENERAL ELECTRIC TECH GMBH
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