Exhaust gas purifier and operating method thereof

Details Exhaust gas purifier and operating method thereof Exhaust gas purifier and operating method thereof

1998-11-12

2000-09-19

Simmons, David A.

Gas separation: processes

Filtering

With cleaning of filter

95283, 55283, 552823, 55287, 55288, 55484, 55DIG10, 55DIG30, 60303, 60311, B01D 2952, B01D 2962

Patent

active

061205834

ABSTRACT:
An exhaust gas purifier, having three or more filter units parallel, wherein if at least one filter unit fails during its generation, it is compensated by the cyclic operation of the maining filter units so that the total function of the exhaust gas purifier is practically maintained. Electric heaters 14 are provided for regenerating individual filter units 3, and valves 4 are placed either at the entrances or at the exits of the units 3. While filter units 3 with opened valves 4 trap particulates, at least one filter unit 3's valve 4 is closed to send an electric current into the heater 14 for regenerating the filter unit 3. If the detected current is beyond a predetermined range, the current supply is shut off with the valve 4 still kept closed, and another filter unit 3 is regenerated in the same manner.

REFERENCES:
patent: 4709549 (1987-12-01), Lepperhoff
patent: 4848083 (1989-07-01), Goerlich
patent: 5486220 (1996-01-01), Honda et al.
patent: 5651248 (1997-07-01), Kawamura

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