US3691644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and arrangement for the continuous thermal treatment of granular material with a gas
Assignee: Buehler AG
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Filing: 1971-01-12
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Granted: 1972-09-19
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Expires: 1991-01-12
Abstract
Abstract A device for the continuous thermal treatment of a granular material by means of a gas comprises a container having an inlet for the granular material which opens into a chamber arranged above a stationary gas-permeable material support which may be in the form of an inclined perforated wall. The container includes walls around the support, one of which at least includes a material outlet, for example, which is arranged at the lower end of the support. A gas is directed upwardly against the support at a plurality of separated areas in a flow stream which is regulated to maintain the material in a homogeneous loose fluid bed above the support. Means are provided at the outlet for effecting an infinitely vertically adjustable overflow. A throttling device is arranged in the flow paths of the fluid at a location before the support in order to selectively vary the velocity of gas flowing through the support and along the feed travel of the fluid bed of granular material. In accordance with the method of the invention, the granular material is directed into the chamber above the stationary support and the overflow to the outlet is set at a predetermined level. Thereafter, a treatment gas is directed through at least two distinct paths alternately upwardly through separate divided portions of this support. The gas flow is controlled so that there is an alternate flow first to one side and then to another side of the fluid bed and thence outwardly through the outlet along with the granular material which moves over the bed level.
Inventors
- 👤 Hans Schnitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:34
CPC Classifications
F; F26; F26B; F26B3/00; F26B3/02; F26B3/06; F26B3/08; F26B3/082; B; B29; B29B; B29B13/00; B29B13/06; B29B13/065; B29B9/00; B29B9/16; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16; F28F; F28F27/00; F28F27/02
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
135 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with a spaced apart inlet and outlet for granular material and an outlet for treatment gas, adjustable granular material overflow means separating the bed chamber from the outlet, a gas-permeable support plate extending across the bottom of said granular material bed chamber and providing a support for the granular material, means defining at least two separate treatment gas passages through said support plate, and fan means connected to direct cyclically a treatment gas flow and to cut off the flow through said gas passages and respective portions of said support plate and at rates to maintain the bed of granular material in a fluid state along the various portions of said plate.
Claim 2
Independent Claim
135 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with a spaced apart inlet and outlet for granular material and an outlet for treatment gas, adjustable granular material overflow means separating the bed chamber from the outlet, a gas-permeable support plate extending across the bottom of said granular material bed chamber and providing a support for the granular material, means defining at least two separate treatment gas passages through said support plate, and fan means connected to direct cyclically a treatment gas flow and to cut off the flow through said gas passages and respective portions of said support plate and at rates to maintain the bed of granular material in a fluid state along the various portions of said plate.
Claim 3
Dependent Claim
80 words
A device for treating a granular material with a treatment gas, according to claim 1, wherein said inlet is located adjacent one end of said support plate, and said outlet for the granular material is located adjacent the opposite end, said material being movable from said inlet toward said outlet, said fan partition means including means dividing the flow of treatment air along the length of said plate from said inlet to said outlet and for regulating said divided flow.
Claim 4
Dependent Claim
30 words
A device for treating a granular material with a treatment gas, according to claim 1, wherein said support extends downwardly from said inlet to said outlet for the granular material.
Claim 5
Dependent Claim
43 words
A device for treating a granular material with a treatment gas, according to claim 1, wherein said fan means includes a fan having a discharge with throttle means associated therewith, said fan discharging into a plurality of chambers located below said support plate.
Claim 6
Dependent Claim
46 words
A device for treating a granular material with a treatment gas, according to claim 4, wherein said plurality of passages each includes at least one gas inlet orifice for the flow of the gas from said fan and means for varying the size of the orifice.
Claim 7
Independent Claim
192 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and cyclically movable valve means at the entrance into said gas chambers located between said fan and the connection to said flow chambers for effecting cyclical flow and cut off of flow through each of said chambers to subject the areas of said support plate overlying said chambers to flow therethrough at different times.
Claim 8
Independent Claim
192 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and cyclically movable valve means at the entrance into said gas chambers located between said fan and the connection to said flow chambers for effecting cyclical flow and cut off of flow through each of said chambers to subject the areas of said support plate overlying said chambers to flow therethrough at different times.
Claim 9
Dependent Claim
32 words
A device for treating a granular material with a treatment gas, according to claim 6, wherein each of said chambers are divided below said support member into a plurality of additional chambers.
Claim 10
Dependent Claim
36 words
A device for treating a granular material with a treatment gas, according to claim 7, including perforated plate means below each of said additional chambers for regulating the flow of air through each of said chambers.
Claim 11
Dependent Claim
53 words
A device for treating a granular material with a treatment gas, according to claim 8, wherein said means for regulating the flow through each of said chambers includes a perforated plate located in spaced location from the bottom of said support plate and having means for varying the size of the perforations therein.
Claim 12
Dependent Claim
56 words
A device for treating a granular material with a treatment gas, according to claim 6, wherein the connection of said fan to the underside of said support plate is divided by a partition wall to form first and second flow paths, and a plurality of perforated plates extending across said flow paths at spaced locations therealong.
Claim 13
Dependent Claim
58 words
A device for treating a granular material with a treatment gas, according to claim 6, wherein said overflow means includes a wall having an overflow opening and an adjustable closure member connected to said wall and being pivotal away from the latter to vary the opening and the heighth of the fluid bed which feeds over the opening.
Claim 14
Dependent Claim
88 words
A device for treating a granular material with a treatment gas, according to claim 6, wherein said support plate extends downwardly from said inlet to said outlet and wherein the connecting space from said fan to the underside of said support plate is divided into a plurality of individual gas flow chambers extending along the length of said plate from said inlet to said outlet said fan being connected to discharge into each of said chambers, and means for selectively regulating the flow to each of said chambers.
Claim 15
Dependent Claim
68 words
A device for treating a granular material with a treatment gas, according to claim 6, wherein the connection between said fan and the underside of said support plate is divided into identical flow area portions below said plate related to the direction of flow of material on said plate said flow area each being connected to said fan for directing a gas through said plate and said chambers.
Claim 16
Independent Claim
107 words
A method for treating granular material with a treatment gas using a perforated support plate for the material, means for feeding the granular material onto the support plate and maintaining it at a predetermined level, and a fan for supplying treatment gas to the material, comprising dividing the flow of air from the fan into two separate flow paths which are directed from the opposite side of the plate through the plate and the material thereon in order to fluidize the material, and periodically interrupting the flow to each of the flow paths in order to vary the pulsing of the gas treatment through the support plate.
Claim 17
Independent Claim
107 words
A method for treating granular material with a treatment gas using a perforated support plate for the material, means for feeding the granular material onto the support plate and maintaining it at a predetermined level, and a fan for supplying treatment gas to the material, comprising dividing the flow of air from the fan into two separate flow paths which are directed from the opposite side of the plate through the plate and the material thereon in order to fluidize the material, and periodically interrupting the flow to each of the flow paths in order to vary the pulsing of the gas treatment through the support plate.
Claim 18
Dependent Claim
83 words
A method for treating a granular material with a treatment gas, according to claim 14, wherein each of the two flow paths are further divided into separate passages extending along the length of the support plate along which the material is fed, and including directing the separate flow paths through the individual flow passages below the support plate and regulating the flow of the gas through each of the passages in order ensure that the entire bed is maintained in a fluidized condition.
Claim 19
Dependent Claim
44 words
A method for treating a granular material with a treatment gas, according to claim 14, including throttling the gas flow through selected ones of the individual flow passages in order to provide a flow control for the treatment gas passing through said support plate.
Claim 20
Independent Claim
203 words
A device for treating a granular material with a treatment gas, comprIsing a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and valve means located between said fan and the connection to said flow chambers for regulating the flow through each of said chambers, said housing includes a cover portion having said material inlet and said gas outlet, and a plate pivotal to said cover portion adjacent said inlet adapted to extend with its end downwardly to the level of the material in said material chamber.
Claim 21
Independent Claim
203 words
A device for treating a granular material with a treatment gas, comprIsing a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and valve means located between said fan and the connection to said flow chambers for regulating the flow through each of said chambers, said housing includes a cover portion having said material inlet and said gas outlet, and a plate pivotal to said cover portion adjacent said inlet adapted to extend with its end downwardly to the level of the material in said material chamber.
Claim 22
Independent Claim
266 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and valve means located between said fan and the connection to said flow chambers for regulating the flow through each of said chambers, the connection between said fan and the underside of said support plate is divided into identical flow area portions below said plate related to the direction of flow of material on said plate, said flow areas each being connected to said fan for directing a gas through said plate and said chambers, said fan connection to said support plate includes a distributor channel, a rotary flap in said distributor channel, means connected to said flap to rotate said flap, said channel being divided and having a flap in each part located to periodically close the associated part for regulating the flow of treatment gas therethrough.
Claim 23
Independent Claim
266 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and valve means located between said fan and the connection to said flow chambers for regulating the flow through each of said chambers, the connection between said fan and the underside of said support plate is divided into identical flow area portions below said plate related to the direction of flow of material on said plate, said flow areas each being connected to said fan for directing a gas through said plate and said chambers, said fan connection to said support plate includes a distributor channel, a rotary flap in said distributor channel, means connected to said flap to rotate said flap, said channel being divided and having a flap in each part located to periodically close the associated part for regulating the flow of treatment gas therethrough.
Claim 24
Independent Claim
194 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and valve means located between said fan and the connection to said flow chambers for regulating the flow through each of said chambers, said fan including control means associated therewith for directing a pulsating gas flow along the length of said plate which passes through said plate simultaneously along no more than half the area thereof.
Claim 25
Independent Claim
194 words
A device for treating a granular material with a treatment gas, comprising a housing having an interior defining a granular material bed chamber with an inlet adjacent one end of said chamber and an outlet adjacent the opposite end of said chamber for said granular material, a treatment gas outlet adjacent the top of said chamber, adjustable granular material overflow means separating the bed chamber from said outlet for the granular material, a gas-permeable support plate extending across the bottom of said granulated material bed chamber from said inlet to said outlet for the granular material and providing a support for the granular material during its treatment and movement, a fan having a discharge connected to said housing below said support plate, a partition dividing said housing below said support plate into at least two gas flow chambers, and valve means located between said fan and the connection to said flow chambers for regulating the flow through each of said chambers, said fan including control means associated therewith for directing a pulsating gas flow along the length of said plate which passes through said plate simultaneously along no more than half the area thereof.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |