Method and apparatus for electrostatic dust precipitation

Details Method and apparatus for electrostatic dust precipitation Method and apparatus for electrostatic dust precipitation

B - Operations, Transporting

03

C

317/2.1

B03C 3/68 (2006.01) B03C 3/76 (2006.01)

Patent

CA 1198472

METHOD AND APPARATUS FOR ELECTROSTATIC DUST PRECIPITATION Abstract An electrostatic precipitator (1) comprises one or more electric fields defined by electrode means each having a respective high-voltage rectifier set (9). The concentration of dust in the gas stream (5) from the precipitator (1) is monitored by an optical density meter (6) which generates a data signal. The concentrat- ion indicated by the data signal is compared with a pre- determined target concentration and, if a difference is found, the limit on the current of at least one rectifier set (9) is altered by control means (7) in order to adjust the measured dust concentration towards the said target level. Provision is made for rapping operations and for sudden surges in the dust level due to changes in the process conditions producing the dust-laden gas (2) to be cleaned.

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