US3589317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cooling slag coming from a combustion furnace
Assignee: Von Roll AG
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Filing: 1970-03-03
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Granted: 1971-06-29
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Expires: 1990-03-03
Abstract
Abstract There is disclosed a method and apparatus for cooling slag emanating from a combustion furnace operating with wet slag removal, wherein the slag is permitted to fall into the water bath of a slag removal device through the agency of a slag drop shaft which is closed at all sides about its periphery, the slag drop shaft being disposed between the combustion compartment of the furnace and the water bath of the slag removal device. According to an important aspect of the invention, the slag is periodically restrained and dammed up in the slag drop shaft along its fall path from the discharge end of the combustion grate into the water bath of the slag removal device, and further, this slag is sprayed with water and quenched within the slag drop shaft.
Inventors
- 👤 Robert Kunovits
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:43
CPC Classifications
F; F23; F23J; F23J1/00; F23J2700/00; F23J2700/003
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
118 words
A method for cooling slag coming from a combustion furnace operating with wet slag removal, comprising the steps of allowing the slag to fall into a water bath of a slag removal device through the agency of a slag drop shaft which is closed about its periphery at all sides, the slag drop shaft being disposed between the combustion compartment of the furnace and the water bath of the slag removal device, periodically restraining and damming up the slag within the slag drop shaft along its fall path between the discharge end of the combustion grate in the combustion compartment to the water bath, and spraying the slag and quenching same with water within the slag drop shaft.
Claim 2
Independent Claim
118 words
A method for cooling slag coming from a combustion furnace operating with wet slag removal, comprising the steps of allowing the slag to fall into a water bath of a slag removal device through the agency of a slag drop shaft which is closed about its periphery at all sides, the slag drop shaft being disposed between the combustion compartment of the furnace and the water bath of the slag removal device, periodically restraining and damming up the slag within the slag drop shaft along its fall path between the discharge end of the combustion grate in the combustion compartment to the water bath, and spraying the slag and quenching same with water within the slag drop shaft.
Claim 3
Dependent Claim
26 words
A method as defined in claim 1, wherein the slag is only sprayed with water and quenched when it is dammed up in the drop shaft.
Claim 4
Dependent Claim
27 words
A method as defined in claim 1, wherein the slag is continuously sprayed with water independent of its periodic retention and damming up in the drop shaft.
Claim 5
Independent Claim
142 words
An apparatus for cooling slag coming from a combustion furnace, comprising at least one slag drop shaft provided with a bend to divide said slag drop shaft into an upper substantially vertical portion and a lower inclined portion, said lower inclined portion being provided at one side oF said slag drop shaft with an inclined sliding surface for the dropping slag, a catching mechanism for the slag located at the lower region of said sliding surface, drive means disposed externally of said slag drop shaft for periodically moving said catching mechanism, spray nozzle means located at a wall portion of said slag drop shaft which is situated opposite said sliding surface, said spray nozzle means being directed towards said sliding surface, pressurized water conduit means, and a distributor system for operatively connecting said spray nozzle means to said pressurized water conduit means.
Claim 6
Independent Claim
142 words
An apparatus for cooling slag coming from a combustion furnace, comprising at least one slag drop shaft provided with a bend to divide said slag drop shaft into an upper substantially vertical portion and a lower inclined portion, said lower inclined portion being provided at one side oF said slag drop shaft with an inclined sliding surface for the dropping slag, a catching mechanism for the slag located at the lower region of said sliding surface, drive means disposed externally of said slag drop shaft for periodically moving said catching mechanism, spray nozzle means located at a wall portion of said slag drop shaft which is situated opposite said sliding surface, said spray nozzle means being directed towards said sliding surface, pressurized water conduit means, and a distributor system for operatively connecting said spray nozzle means to said pressurized water conduit means.
Claim 7
Dependent Claim
18 words
An apparatus as defined in claim 4, wherein said catching mechanism for the slag comprises catching rake means.
Claim 8
Dependent Claim
59 words
An apparatus as defined in claim 5, further including a substantially horizontal shaft member, said catching rake means being pivotably mounted at said shaft member and being pivotable by said drive means out of a lower terminal position into an upper terminal position wherein said catching rake means is disposed at least approximately perpendicular to said inclined sliding surface.
Claim 9
Dependent Claim
41 words
An apparatus as defined in claim 5, wherein said catching rake means is constructed as a to-and-fro slidable catching rake member which when inserted into said slag drop shaft serves to block the movement of slag through said slag drop shaft.
Claim 10
Dependent Claim
24 words
An apparatus as defined in claim 5, wherein said catching rake means is capable of being manually remote controlled from a central command station.
Claim 11
Dependent Claim
55 words
An apparatus as defined in claim 7, further including means for operatively connecting said spray nozzle means with said drive means for the catching rake means so that pressurized water is only sprayed out of said spray nozzle means when said catching rake means has assumed its slag blocking position within said slag drop shaft.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |