Patent US4037330A successfully refreshed from Google Patents.
US4037330A
Expired / Lapsed
US
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Method and means for dry cooling bulk materials
Assignee: Waagner Biro AG
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Filing: 1976-05-17
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Granted: 1977-07-26
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Expires: 1996-05-17
Abstract
Abstract The invention disclosed is addressed to a method and means of dry cooling bluk material within a closed system in which said material is usually supplied intermittently to a cooling station. The method comprises directing a substantially continuous stream of cooling gas through the bulk material to thereby cool it and at the same time heat the stream of cooling gas. The heated stream of cooling gas is removed from the bulk material and directed through a mixing zone where it is mixed with a stream of cold cooling gas. Preferably, the hot mixed gas is cleaned and thereafter cooled by passage through a heat exchanger means. A selected portion of the cold cooling gas is diverted from the main stream to the mixing zone for mixing with the heated stream from the bulk material. The nondiverted portion of the cold cooling gas is directed to and through the bulk material.
Inventors
- 👤 Roland Kemmetmuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:38
CPC Classifications
C; C10; C10B; C10B39/00; C10B39/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
118 words
A method for dry cooling hot bulk material within a closed system with a cooling gas, said method comprising: a. directing a cooling gas through said bulk material to thereby cool said material and heat said cooling gas; b. removing said heated cooling gas from said bulk material and mixing therewith a cold cooling gas; c. cooling said mixture of heated and cold cooling gases to provided a cold stream of cooling gas; and d.i selectively diverting a portion of said cold stream of cooling gas to the removed heating cooling gas for mixing therewith in step b; and ii directing the undiverted portion of said cold stream of cooling gas to said bulk material for cooling same.
Claim 2
Independent Claim
118 words
A method for dry cooling hot bulk material within a closed system with a cooling gas, said method comprising: a. directing a cooling gas through said bulk material to thereby cool said material and heat said cooling gas; b. removing said heated cooling gas from said bulk material and mixing therewith a cold cooling gas; c. cooling said mixture of heated and cold cooling gases to provided a cold stream of cooling gas; and d.i selectively diverting a portion of said cold stream of cooling gas to the removed heating cooling gas for mixing therewith in step b; and ii directing the undiverted portion of said cold stream of cooling gas to said bulk material for cooling same.
Claim 3
Dependent Claim
25 words
A method as set forth in claim 1 wherein said heated cooling gas is cleaned of coarse particles after mixing with said cold cooling gas.
Claim 4
Dependent Claim
36 words
A method as set forth in claim 1 wherein said diverted portion is selectively controlled to maintain a constant quantity of gas to be cooled and a temperature of less than about 650° C. after mixing.
Claim 5
Dependent Claim
35 words
A method as set forth in claim 1 wherein said diverted portion of said cold cooling gas is conditioned to maintain the chemical analysis within selected limits prior to mixing with the heated cooling gas.
Claim 6
Dependent Claim
21 words
A method as set forth in claim 1 wherein said cooling gas is removed from said bulk material under reduced pressure.
Claim 7
Dependent Claim
43 words
A method as set forth in claim 1 including the steps: i. intermittently supplying hot bulk material to a cooling station within said closed system; and ii. after cooling at least a portion of said bulk material, removing said cooled portion of material.
Claim 8
Dependent Claim
27 words
A method as set forth in claim 6 wherein said bulk material has a residence time within said cooling station of from between 3 and 4 hours.
Claim 9
Dependent Claim
24 words
A method as set forth in claim 6 wherein said hot bulk material is cooled to a temperature of less than about 200° C.
Claim 10
Dependent Claim
139 words
A means for dry cooling hot bulk material comprising: a. a cooling station for receiving and holding hot bulk material; b. a hot gas discharge duct connected to said cooling station at one end and to a gas mixing means at its other end; c. a gas mixing means connected to said discharge duct; d. a heat exchanger having an inlet connected to said gas mixing means; e. a circulation fan in communication with the discharge end of said heat exchanger; f. a gas inlet duct connected to the outlet of said blower and to said cooling station; and g. a by-pass line in communication with said gas inlet duct and said mixing means for diverting a selected portion of gas from said inlet duct to said mixing means for mixture with hot gases discharged from the cooling station.
Claim 11
Dependent Claim
139 words
A means for dry cooling hot bulk material comprising: a. a cooling station for receiving and holding hot bulk material; b. a hot gas discharge duct connected to said cooling station at one end and to a gas mixing means at its other end; c. a gas mixing means connected to said discharge duct; d. a heat exchanger having an inlet connected to said gas mixing means; e. a circulation fan in communication with the discharge end of said heat exchanger; f. a gas inlet duct connected to the outlet of said blower and to said cooling station; and g. a by-pass line in communication with said gas inlet duct and said mixing means for diverting a selected portion of gas from said inlet duct to said mixing means for mixture with hot gases discharged from the cooling station.
Claim 12
Dependent Claim
30 words
A means as set forth in claim 9 wherein said cooling station includes a distributor means connected to said inlet duct to direct a cooling gas within said cooling station.
Claim 13
Dependent Claim
28 words
A means as set forth in claim 9 wherein said cooling station includes an inlet having an air lock means and a discharge outlet having a lock gate.
Claim 14
Dependent Claim
23 words
A means as set forth in claim 9 wherein said by-pass line includes means for conditioning the gas circulating in said closed circuit.
Claim 15
Dependent Claim
26 words
A means as set forth in claim 9 wherein by-pass line and main inlet duct includes valve means for selectively controlling the flow of gas therethrough.
Claim 16
Dependent Claim
21 words
A means as set forth in claim 9 wherein said heat exchanger comprises a steam generator having a vertical steam drum.
Claim 17
Dependent Claim
21 words
A means as set forth in claim 9 including a coarse particle separator positioned between said mixing means and heat exchanger.
Claim 18
Dependent Claim
22 words
A means as set forth in claim 9 including at least one dust separator positioned between said heat exchanger and circulation fans.
References Cited (Backward Citations)
US3837792A
Cited
US3959084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-25 | 1981-01-24 | 1981-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-25 | 1985-01-24 | 1985-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-25 | 1989-01-24 | 1989-07-26 | $7700.00 | Window Closed / Lapsed |