Gas separation – With nonliquid cleaning means for separating media – With heating or cooling means
Patent
1983-12-27
1985-10-01
Lacey, David L.
Gas separation
With nonliquid cleaning means for separating media
With heating or cooling means
55272, 55283, 55288, 55314, 55DIG10, 55DIG30, 422178, 60303, 60311, 60320, B01D 3920, B01D 4642, F01N 302, F01N 310
Patent
active
045443882
ABSTRACT:
An apparatus is disclosed for regenerating a filter trap used to collect particulates from the exhaust gas of an internal combustion engine. The apparatus comprises: (a) an assembly providing a flow of a heat transfer medium through the filter trap: (b) an assembly for heating the heat transfer medium to a temperature effective to incinerate the particulates in the filter trap: and (c) a flow mask stationed in the flow of heat transfer medium, upstream from said filter trap, effective to divert the heat transfer medium away from the radially inner zone of the filter trap while guiding the heat transfer medium to engage and ignite the particulates along a radially outer region of the filter trap. The mask is a circular disc and spaced upstream from the filter trap effective to mask a central core area of the flow of heat transfer medium.
The assembly for heating comprises one or more electrically heated resistance elements arranged in a planar coil configuration extending transversely across the flow of heat transfer medium. A flow diffuser is stationed upstream from the mask and is comprised of a plurality of foraminous plates effective to diffuse and slow down the flow of heat transfer medium for increasing heat exchange. The flow diffuser has a radiation reflective coating to limit heat losses and a member is employed for depressing the temperature required to ignite the particulates.
REFERENCES:
patent: 2898202 (1959-08-01), Houdry et al.
patent: 3719457 (1973-03-01), Nagamatsu
patent: 3779015 (1973-12-01), Maruora
patent: 3852042 (1974-12-01), Wagner
patent: 4322387 (1982-03-01), Virk et al.
patent: 4383411 (1983-05-01), Riddel
patent: 4404795 (1983-09-01), Oishi et al.
patent: 4416674 (1983-11-01), McMahon et al.
Rao Vemulapalli D. N.
Wade Wallace R.
Ford Motor Company
Lacey David L.
Malleck Joseph W.
May Roger L.
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