IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0512776
(1995-08-09)
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| 우선권정보 |
DE-4305915 (1993-02-26) |
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발명자
/ 주소 |
- Buck Alfred (Nagolder Strasse 32 D-72108 Nagold DEX)
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| 인용정보 |
피인용 횟수 :
26 인용 특허 :
0 |
초록
▼
To prevent damage to an electrical resistance heater (13-16) which, when energized by electrical energy, for example in the order of 100 A at 12-24 V, a heat reservoir substance is included in the filter, positioned in heat transfer relation to the electrical resistance heater (13-16) and located, w
To prevent damage to an electrical resistance heater (13-16) which, when energized by electrical energy, for example in the order of 100 A at 12-24 V, a heat reservoir substance is included in the filter, positioned in heat transfer relation to the electrical resistance heater (13-16) and located, with respect to the flow direction of the gas stream through the filter, upstream of the filter material (15). Preferably, the electrical resistance heater is a perforated, tubular sheet-metal structure, axial ends of which are electrically connectable by connecting bolts (21, 25) to an electrical energy supply. The heat reservoir substance (14) is either wrapped at the outside over the tubular resistance heater (13-16), applied as a layer (14a) at the inside of the tubular resistance heater, or filled into the hollow interior thereof in form of a wire wool (14b). This substantially increases the heat transfer or heat exchange surface between the resistance heater and gases flowing therethrough, thus decreasing required electrical heating energy and protecting the resistance heater (13-16) against overheating upon variations in gas flow when the heater is energized. A typical heater temperature is 1300°C., and it is, for example, made of sheet metal of 22% chromium, 4.8% aluminum, the remainder iron; the filter material preferably includes mineral fibers and metal wire; the heat reservoir substance (14) can be Inconel (Reg. TM) wire, preferably knitted.
대표청구항
▼
Regeneratable filter for combustible solid particles within a gas stream, having a housing (2) having a gas stream inlet (7) and a gas stream outlet (8); a filter medium support (13) located in the housing (2); gas pervious, high temperature resistant filter material (15) supported on said filter me
Regeneratable filter for combustible solid particles within a gas stream, having a housing (2) having a gas stream inlet (7) and a gas stream outlet (8); a filter medium support (13) located in the housing (2); gas pervious, high temperature resistant filter material (15) supported on said filter medium support (13); an electrical resistance heater (13-16) located in the housing and positioned, with respect to the flow direction of the gas stream through the filter, upstream of said filter material (15), and comprising, in accordance with the invention, a heat transfer material (14) located in the housing, and having, inherently, limited thermal inertia, said heat transfer material being located in physical heat transfer contact with the electrical resistance heater (13-16), to increase the effective heat transfer surface of the electrical resistance heater to the gas stream and affect heat transfer from said heater to the gas stream without essentially inhibiting gas flow; said heat transfer material having a surface in contact with the gas which is substantially larger than the surface of the electrical resistance heater; and said heat transfer material (14) being positioned, with respect to the flow direction of the gas stream through the filter, upstream of said filter material (15), and thermally exposed to said gas stream for heat exchange with the gas stream.
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