Patent US4141154A successfully refreshed from Google Patents.
US4141154A
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Method for the cooling of a shaft furnace for the calcining of lime, dolomite or magnesite
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1977-12-09
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Granted: 1979-02-27
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Expires: 1997-12-09
Abstract
Abstract A method and apparatus is disclosed for the cooling of a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel. In shaft chambers of the shaft furnace, a hollow beam is provided to convey combustible fuel into the shaft chamber. Associated with the hollow beam is a cooling unit for cooling walls of the beam. A closed circuit cooling liquid system connects with the cooling unit so as to maintain a flow of a cooling liquid through the cooling unit. The cooling liquid has a boiling point of greater than 100° C. This cooling liquid is continuously recooled by a heat exchanger.
Inventors
- 👤 Heinrich Buchner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:50
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/24; F27D; F27D9/00
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
90 words
A method for the cooling of a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel, comprising the steps of: providing at least one shaft chamber in the shaft furnace; conveying the combustible fuel through a hollow beam means into the shaft chamber, said hollow beam means having a cooling means adjacent thereto in the shaft chamber; and conveying a temperature resistant cooling liquid in a closed circuit through the cooling means, said liquid having a boiling point of more than 100° C.
Claim 2
Independent Claim
90 words
A method for the cooling of a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel, comprising the steps of: providing at least one shaft chamber in the shaft furnace; conveying the combustible fuel through a hollow beam means into the shaft chamber, said hollow beam means having a cooling means adjacent thereto in the shaft chamber; and conveying a temperature resistant cooling liquid in a closed circuit through the cooling means, said liquid having a boiling point of more than 100° C.
Claim 3
Dependent Claim
12 words
The method of claim 1 in which the cooling liquid is organic.
Claim 4
Dependent Claim
12 words
The method of claim 1 in which the cooling liquid is inorganic.
Claim 5
Dependent Claim
12 words
The method of claim 1 in which the fuel is a liquid.
Claim 6
Dependent Claim
12 words
The method of claim 1 in which the fuel is a gas.
Claim 7
Dependent Claim
24 words
The method for the cooling of a lime shaft furnace according to claim 1 in which the cooling liquid is a heat carrying oil.
Claim 8
Dependent Claim
13 words
The method of claim 6 in which the oil is a silicon oil.
Claim 9
Dependent Claim
31 words
The method for the cooling of a lime shaft furnace, according to claim 1 in which the operating temperature of the cooling liquid is regulated between 100° C. and 270° C.
Claim 10
Dependent Claim
18 words
The method of claim 8 in which the regulated operating temperature is between 200° C. and 220° C.
Claim 11
Dependent Claim
30 words
The method for the cooling of a lime shaft furnace according to claim 1 in which the cooling liquid is cooled and recooled in a cooler by use of air.
Claim 12
Dependent Claim
34 words
The method for the cooling of a lime shaft furnace according to claim 1 in which the cooling liquid is cooled and recooled through a heat exchange with the fuel of the shaft furnace.
Claim 13
Dependent Claim
34 words
The method for the cooling of a lime shaft furnace according to claim 1 in which the cooling liquid closed circuit is supervised by use of pressure control systems, thermostats, and flow measurement devices.
Claim 14
Dependent Claim
95 words
A cooling system for a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel, comprising: a lime shaft furnace having at least one shaft chamber therein; a hollow beam means for conveying the combustible fuel into the shaft furnace, said hollow carrier having a cooling means adjacent thereto in the shaft chamber; a closed circuit cooling liquid conduit system connected to the cooling means; and a cooling liquid in the conduit system which flows through the cooling means, said cooling liquid having a boiling temperature above 100° C.
Claim 15
Dependent Claim
95 words
A cooling system for a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel, comprising: a lime shaft furnace having at least one shaft chamber therein; a hollow beam means for conveying the combustible fuel into the shaft furnace, said hollow carrier having a cooling means adjacent thereto in the shaft chamber; a closed circuit cooling liquid conduit system connected to the cooling means; and a cooling liquid in the conduit system which flows through the cooling means, said cooling liquid having a boiling temperature above 100° C.
Claim 16
Dependent Claim
28 words
The system of claim 13, characterized in that the cooling liquid conduit system has a re-cooler which is constructed as a heat exchange radiator flowed through by air.
Claim 17
Dependent Claim
28 words
The system of claim 13, characterized in that the cooling liquid conduit system has a re-cooler which is constructed as a heat exchanger with a fuel supply system.
Claim 18
Dependent Claim
27 words
The system of claim 13, characterized in that the cooling liquid conduit system has at least two pressure control systems, two thermostats, and a flow measuring device.
Claim 19
Dependent Claim
105 words
A cooling system for a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel, comprising: a lime shaft furnace having a shaft chamber therein; hollow beam means in the shaft chamber for conveying combustible fuel into the shaft furnace; cooling means in the shaft chamber for cooling the hollow beam means; a closed circuit cooling liquid conduit system connected to the cooling means; and a cooling liquid in the conduit system having a boiling temperature above 100° C., whereby the hollow carrier means is cooled with a cooling liquid operable at higher temperatures and in a closed system.
Claim 20
Dependent Claim
105 words
A cooling system for a lime shaft furnace for the calcining of limestone and which is operable with a combustible fuel, comprising: a lime shaft furnace having a shaft chamber therein; hollow beam means in the shaft chamber for conveying combustible fuel into the shaft furnace; cooling means in the shaft chamber for cooling the hollow beam means; a closed circuit cooling liquid conduit system connected to the cooling means; and a cooling liquid in the conduit system having a boiling temperature above 100° C., whereby the hollow carrier means is cooled with a cooling liquid operable at higher temperatures and in a closed system.
Claim 21
Dependent Claim
25 words
The system of claim 17 in which the cooling means comprises means directly connected to walls of the hollow beam means to cool said walls.
Claim 22
Dependent Claim
27 words
The system of claim 16 wherein monitoring means are provided to prevent excessive operating temperatures of the cooling liquid, said cooling liquid comprising a heat carrying oil.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |