US3595543A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of treating and cooling cement clinker
Assignee: United States Steel Corp
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Filing: 1970-01-08
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Granted: 1971-07-27
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Expires: 1990-01-08
Abstract
Abstract This invention relates to an apparatus for and method of cooling and treating cement clinker discharged from a discharge end of a cement kiln, which kiln has a burner disposed adjacent the discharge end. The apparatus has a grate-type cooling means adapted to receive a bed of the cement clinker from the discharge end at a temperature of about 2,700to 2,800* F. and to discharge the cement clinker at a temperature of about 350* F. The cooling means has a pressure zone for cooling the cement clinker from a temperature of about 2,500* to a temperature of about 1,850*. A first cooling means is disposed adjacent the pressure zone for directing a pressurized cooling fluid through the cooling means and through the bed to cool the cement clinker from a temperature of about 2,500* F. to a temperature of about 1,850* F. and also to heat the cooling fluid to a temperature of about 400* to about 500* F. for use as secondary air for the burner. The cooling means also has a reduction and cooling zone adjacent the pressure zone for cooling and treating the cement clinker from a temperature of about 1,850* F. to a temperature of about 1,100* F. Gas generator means in the reduction and cooling zone direct a pressurized reducing fluid through the cooling means and through the bed to cool the cement clinker from a temperature of about 1,850* F. to a temperature of about 1,100* F. and to exit the reducing fluid from the reduction and cooling zone. Additionally, the cooling means has a cooling zone adjacent the reduction and cooling zone for cooling the cement clinker from a temperature of about 1,100* F. to a temperature of about 350* F. A second cooling means adjacent the cooling zone directs a pressurized cooling fluid through the cooling means and through the bed to cool the cement clinker from about 1,100* F. to about 350* F. and to heat the cooling fluid to a temperature of about 230* to 250* F. for use as primary air for the burner. The method includes the steps of receiving a bed of the cement clinker on a grate-type cooling means from the discharge end at a temperature of about 2,700* to 2,800* F.; cooling the cement clinker in a pressure zone of the cooling means from a temperature of about 2,500* F. to a temperature of about 1,850* F. by directing a pressurized cooling fluid through the cooling means and through the bed to heat the cooling fluid to a temperature of about 400* to about 500* F. for use as secondary air for the burner; cooling the partially cooled cement clinker in a reduction and cooling zone adjacent the pressure zone of the cooling means from a temperature of about 1,850* F. to a temperature of about 1,100* F. by directing a pressurized reducing fluid through the cooling means and through the bed and to exit the reducing fluid from the reduction and cooling zone; and cooling the reduced cement clinker in a cooling zone adjacent the reduction and cooling zone from a temperature of about 1,100* F. to a temperature of about 350* F. by directing a pressurized cooling fluid through the cooling means and through the bed to heat the cooling fluid to a temperature of about 230* to 250* F. for use as primary air for the burner.
Inventors
- 👤 Stewart W Tresouthick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:19
CPC Classifications
F; F27; F27D; F27D19/00; F27B; F27B7/00; F27B7/20; F27B7/42; F27D15/00; F27D15/02; F27D15/0206; F27D15/0213; F27D15/022; F27D2015/0233; F27D2019/0006; F27D2019/0018; F27D2019/0028; F27D2019/0068; F27D21/00; F27D2021/0007
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
380 words
Apparatus for cooling cement clinker discharged from a discharged from a discharge end of a cement kiln, said kiln having a burner disposed adjacent said discharge end, said apparatus having: a. grate-type cooling means adapted to receive a bed of said cement clinker from said discharge end at a temperature Of about 2,700* to about 2,800* F. and to discharge said cement clinker at a temperature of about 350* F.; b. said cooling means having a pressure zone for cooling said cement clinker from a temperature of about 2,500* F. to a temperature of about 1,850* F.; c. a first cooling means adjacent said pressure zone for directing a cooling fluid through at a pressure sufficient to pass said cooling fluid through said cooling means and through said bed of said cement clinker to cool said cement clinker from a temperature of about 2,500* F. to a temperature of about 1,850* F., and to heat said cooling fluid to a temperature of about 400* to about 500* F. for use as secondary air for said burner; d. said cooling means having a reduction and cooling zone adjacent said pressure zone for cooling said cement clinker from a temperature of about 1,850* F. to a temperature of about 1,100* F.; e. gas generator means in said reduction and cooling zone for directing a reducing fluid having a pressure sufficient to pass said reducing fluid through said cooling means and through said bed to cool said cement clinker from a temperature of about 1,850* F. to a temperature of about 1,100* F. and to exit said reducing fluid from said reduction and cooling zone; f. said cooling means having a cooling zone adjacent said reduction and cooling zone for cooling said cement clinker from a temperature of about 1,100* F. to a temperature of about 350* F.; and g. a second cooling means adjacent said cooling zone for directing a cooling fluid having a pressure sufficient to pass said cooling fluid through said cooling means and through said bed to cool said cement clinker from a temperature of about 1,100* F. to a temperature of about 350* F. and to heat said cooling fluid to a temperature of about 230* F. to 250* F. for use as primary air for said burner.
Claim 2
Dependent Claim
380 words
Apparatus for cooling cement clinker discharged from a discharged from a discharge end of a cement kiln, said kiln having a burner disposed adjacent said discharge end, said apparatus having: a. grate-type cooling means adapted to receive a bed of said cement clinker from said discharge end at a temperature Of about 2,700* to about 2,800* F. and to discharge said cement clinker at a temperature of about 350* F.; b. said cooling means having a pressure zone for cooling said cement clinker from a temperature of about 2,500* F. to a temperature of about 1,850* F.; c. a first cooling means adjacent said pressure zone for directing a cooling fluid through at a pressure sufficient to pass said cooling fluid through said cooling means and through said bed of said cement clinker to cool said cement clinker from a temperature of about 2,500* F. to a temperature of about 1,850* F., and to heat said cooling fluid to a temperature of about 400* to about 500* F. for use as secondary air for said burner; d. said cooling means having a reduction and cooling zone adjacent said pressure zone for cooling said cement clinker from a temperature of about 1,850* F. to a temperature of about 1,100* F.; e. gas generator means in said reduction and cooling zone for directing a reducing fluid having a pressure sufficient to pass said reducing fluid through said cooling means and through said bed to cool said cement clinker from a temperature of about 1,850* F. to a temperature of about 1,100* F. and to exit said reducing fluid from said reduction and cooling zone; f. said cooling means having a cooling zone adjacent said reduction and cooling zone for cooling said cement clinker from a temperature of about 1,100* F. to a temperature of about 350* F.; and g. a second cooling means adjacent said cooling zone for directing a cooling fluid having a pressure sufficient to pass said cooling fluid through said cooling means and through said bed to cool said cement clinker from a temperature of about 1,100* F. to a temperature of about 350* F. and to heat said cooling fluid to a temperature of about 230* F. to 250* F. for use as primary air for said burner.
Claim 3
Dependent Claim
52 words
The apparatus recited in claim 1 and having a first conducting means adjacent said discharge end for directing said cement clinker from said discharge end to said pressure zone and for directing said heated cooling fluid from said pressure zone to said discharge end for use as secondary air for said burner.
Claim 4
Dependent Claim
37 words
The apparatus recited in claim 1 and having a second conducting means for connecting said cooling zone with said burner and for directing said heated cooling fluid from said cooling zone to said burner as primary air.
Claim 5
Dependent Claim
26 words
The apparatus recited in claim 3 and having blower means in said second conducting means for blowing said heated cooling fluid through said second conducting means.
Claim 6
Dependent Claim
23 words
The apparatus recited in claim 1 wherein said pressure zone is defined by a pressure compartment on one side of said cooling means.
Claim 7
Dependent Claim
35 words
The apparatus recited in claim 5 wherein said pressure zone is defined by said pressure compartment, a kiln firing hood of said kiln and a first baffle on the other side of said cooling means.
Claim 8
Dependent Claim
27 words
The apparatus recited in claim 1 wherein said reduction and cooling zone is defined by a reduction and cooling compartment on one side of said cooling means.
Claim 9
Dependent Claim
35 words
The apparatus recited in claim 7 wherein said reduction and cooling zone is defined by said reduction and cooling compartment, a first baffle and a second baffle on the other side of said cooling means.
Claim 10
Dependent Claim
23 words
The apparatus recited in claim 1 wherein said cooling zone is defined by a cooling compartment on one side of said cooling means.
Claim 11
Dependent Claim
28 words
The apparatus recited in claim 9 wherein said cooling zone is defined by a second baffle and an end wall on the other side of said cooling means.
Claim 12
Dependent Claim
13 words
The apparatus recited in claim 1 wherein said bed has a predetermined depth.
Claim 13
Dependent Claim
26 words
The apparatus recited in claim 1 wherein said pressure zone has a first predetermined length and a retention time of about 6 to about 7 minutes.
Claim 14
Dependent Claim
25 words
The apparatus recited in claim 1 wherein said reduction and cooling zone has a second predetermined length and a retention time greater than 10 minutes.
Claim 15
Dependent Claim
26 words
The apparatus recited in claim 1 wherein said cooling zone has a third predetermined length and a retention time of about 20 to about 30 minutes.
Claim 16
Independent Claim
282 words
A method for cooling a cement clinker discharged from a discharge end of cement kiln and having a burner disposed adjacent said discharge end, said method including the steps of: a. receiving a bed of said cement clinker on a grate-type cooling means from said discharge end, the clinker discharging at about 2,700* to 2,800* F.; b. cooling said cement clinker in a pressure zone of said cooling means from a temperature of about 2,500* F. to a temperature of about 1,850* F. by directing a cooling fluid at a pressure sufficient to pass said cooling fluid through said cooling means and through said bed of said cement clinker to heat said cooling fluid to a temperature of about 400* to about 500* F. for use as secondary air for said burner; c. cooling said partially cooled cement clinker in a reduction and cooling zone adjacent said pressure zone of said cooling means from a temperature of about 1,850* F. to a temperature of about 1,100* F. by directing a reducing fluid having a pressure sufficient to pass said reducing fluid through said cooling means and through said bed and to exit said reducing fluid from said reduction and cooling zone; and d. cooling said reduced cement clinker in a cooling zone of said cooling means adjacent said reduction and cooling zone from a temperature of about 1,100* F. to a temperature of about 350* F. by directing a colling fluid having a pressure sufficient to pass said cooling fluid through said cooling means and through said bed and to heat said cooling fluid to a temperature of about 230* to about 250* F. for use as primary air for said burner.
Claim 17
Independent Claim
282 words
A method for cooling a cement clinker discharged from a discharge end of cement kiln and having a burner disposed adjacent said discharge end, said method including the steps of: a. receiving a bed of said cement clinker on a grate-type cooling means from said discharge end, the clinker discharging at about 2,700* to 2,800* F.; b. cooling said cement clinker in a pressure zone of said cooling means from a temperature of about 2,500* F. to a temperature of about 1,850* F. by directing a cooling fluid at a pressure sufficient to pass said cooling fluid through said cooling means and through said bed of said cement clinker to heat said cooling fluid to a temperature of about 400* to about 500* F. for use as secondary air for said burner; c. cooling said partially cooled cement clinker in a reduction and cooling zone adjacent said pressure zone of said cooling means from a temperature of about 1,850* F. to a temperature of about 1,100* F. by directing a reducing fluid having a pressure sufficient to pass said reducing fluid through said cooling means and through said bed and to exit said reducing fluid from said reduction and cooling zone; and d. cooling said reduced cement clinker in a cooling zone of said cooling means adjacent said reduction and cooling zone from a temperature of about 1,100* F. to a temperature of about 350* F. by directing a colling fluid having a pressure sufficient to pass said cooling fluid through said cooling means and through said bed and to heat said cooling fluid to a temperature of about 230* to about 250* F. for use as primary air for said burner.
Claim 18
Dependent Claim
44 words
The method recited in claim 15 including the step of conducting said cement clinker from said discharge end to said pressure zone and directing said heated cooling fluid from said pressure zone to said discharge end for use as secondary air for said burner.
Claim 19
Dependent Claim
34 words
The method recited in claim 15 and including the steps of connecting said cooling zone with said burner and directing said heated cooling fluid from said cooling zone to said burner as primary air.
Claim 20
Dependent Claim
28 words
The method recited in claim 15 and including the step of blowing said heated cooling fluid from said cooling zone to said burner for use as primary air.
Claim 21
Dependent Claim
79 words
The apparatus recited in claim 1 and having a hood connecting said discharge end and said pressure zone, a second conducting means connecting said cooling zone with said burner, a first pressure sensing means in said hood for sensing the pressure in said hood, a first damper means in said second conducting means, and a first control means connected to said first damper means and said first pressure sensing means for maintaining a slightly negative pressure in said hood.
Claim 22
Dependent Claim
87 words
The apparatus recited in claim 1 and having a third conducting means connecting said cooling means and said pressure zone, a second damper means in said third conducting means, a first temperature sensing means in said reduction and cooling zone, and a second control means connected to said first temperature sensing means and said second damper means to vary the flow of said cooling fluid in said pressure zone and to maintain said cement clinker at about 1,850* F. as said cement clinker leaves said pressure zone.
Claim 23
Dependent Claim
78 words
The apparatus recited in claim 1 and having a fourth conducting means between said gas generation means and said reduction and cooling zone, a third damper means in said fourth conducting means, a second temperature sensing means in said reduction and coOling zone for sensing the temperature therein, a third control means connected to said third damper means and to said second temperature sensing means to control the flow of reducing fluid through said reduction and cooling zone.
Claim 24
Dependent Claim
65 words
The apparatus recited in claim 1 nd having a second pressure sensing means in said reduction and cooling zone, exhaust means from said reduction and cooling zone, a fourth damper means in said exhaust means, and a fourth control means connected to said second pressure sensing means and to said fourth damper means to maintain a slightly positive pressure in said reduction and cooling zone.
Claim 25
Dependent Claim
63 words
The apparatus recited in claim 1 and having a second exhaust means connected to said cooling zone, a fifth damper means in said second exhaust means, a third pressure sensing means in said cooling zone, and a fifth control means connected to said fifth damper means and to said third pressure sensing means to maintain a slightly negative pressure in said cooling zone.
Claim 26
Dependent Claim
43 words
The apparatus recited in claim 1 and having a fifth conducting means between said second cooling means and said cooling zone, and a sixth damper means in said fifth conducting means for controlling the flow of said cooling fluid through said cooling zone.
Claim 27
Dependent Claim
56 words
The method recited in claim 15 and including the steps of connecting said cooling zone with said burner, sensing the pressure adjacent said discharge end of said kiln, damping the primary air to said burner and controlling the damping of said primary air to said burner to maintain a slightly negative pressure adjacent said discharge end.
Claim 28
Dependent Claim
71 words
The method recited in claim 15 and including the steps of connecting said cooling means and said pressure zone, damping the flow of cooling fluid between said cooling means and said pressure zone, sensing the temperature in said reduction and cooling zone and controlling said damping between said cooling means and said pressure zone to maintain said cement clinker at about -,850* F. as said cement clinker reaches said pressure zone.
Claim 29
Dependent Claim
94 words
The method recited in claim 15 and including the steps of connecting said reduction and cooling zone to a gas generation means, damping the flow of reducing fluid between said reduction and cooling zone and said gas generation means, sensing the temperature in said reduction and cooling zone. and controlling the damping of said reducing fluid between said reduction and cooling zone, and controlling the damping of said reducing fluid between said reduction and cooling zone and said gas generation means to control the flow of reducing fluid through said reduction and cooling zone.
Claim 30
Dependent Claim
66 words
The method recited in claim 15 and including the steps of sensing the pressure in said reduction and cooling zone, exhausting said reducing fluid from said reduction and cooling zone, damping the exhaust of said reducing fluid from said reduction and cooling zone, and controlling the damping of said exhaust of said reducing fluid to maintain a slightly positive pressure in said reduction and cooling zone.
Claim 31
Dependent Claim
50 words
The method recited in claim 15 and including the steps of exhausting said cooling zone, damping the exhaust of said cooling zone, sensing the pressure in said cooling zone, and controlling the damping of said exhaust of said cooling zone to maintain a slightly negative pressure in said cooling zone.
Claim 32
Dependent Claim
49 words
The method recited in claim 15 and including the steps of connecting said cooling zone to a second cooling means and damping the flow of said cooling fluid between said cooling zone and said second cooling means to control the flow of said cooling fluid through said cooling zone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |