US3908604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for the heating of a heat-transfer medium
Assignee: MINERALOL und FILTERTECHNIK GM
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Filing: 1974-06-20
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Granted: 1975-09-30
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Expires: 1994-06-20
Abstract
Abstract A liquid medium having a high boiling point, e.g. oil, serves as a heat-transfer medium or a recirculating centrally heated system having a heat exchanger disposed in a combustion chamber. The medium is recirculated through the heat exchanger. At least one burner is provided for the combustion of a fuel composition producing large quantities of corrosive compounds and the system is operated such that the temperature of the combustion gases and the wall of the heat exchanger in contact therewith is always above the dewpoint of the corrosive components of the combustion gases. Preferably the system is operated so that the temperature of the heat-exchange medium is always above 200* C.
Inventors
- 👤 Peter Vocklinghaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:24
CPC Classifications
F; F23; F23C; F23C99/00; F23C1/00; F23C2700/00; F23C2700/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
81 words
A method of centrally heating a heat-transfer fluid comprising the steps of: circulating said fluid through a heat exchanger; generating a hot combustion gas contacting said heat exchanger by combustion of at least one fuel composition generating large quantitiEs of gaseous corrosive components upon combustion; and controlling said combustion by selectively burning a fuel and said composition so that said combustion gas contacts said heat exchanger only at a temperature above the dewpoint of said corrosive components in the combustion gas.
Claim 2
Independent Claim
81 words
A method of centrally heating a heat-transfer fluid comprising the steps of: circulating said fluid through a heat exchanger; generating a hot combustion gas contacting said heat exchanger by combustion of at least one fuel composition generating large quantitiEs of gaseous corrosive components upon combustion; and controlling said combustion by selectively burning a fuel and said composition so that said combustion gas contacts said heat exchanger only at a temperature above the dewpoint of said corrosive components in the combustion gas.
Claim 3
Dependent Claim
26 words
The method defined in claim 1 wherein said combustion gas contacts said heat exchanger always at a temperature of said fluid of at least 200* C.
Claim 4
Dependent Claim
11 words
The method defined in claim 1 wherein said fluid is oil.
Claim 5
Dependent Claim
17 words
The method defined in claim 1 wherein said fuel and said fuel composition are mixed before combustion.
Claim 6
Dependent Claim
21 words
The method defined in claim 1 wherein said fuel and said fuel composition are independently burnt in a common combustion chamber.
Claim 7
Dependent Claim
34 words
The method defined in claim 1 wherein the temperature at a surface of said heat exchanger is detected and used to control the proportions of said fuel and said fuel composition which are burnt.
Claim 8
Independent Claim
123 words
An apparatus for the heating of a recirculated heat-transfer fluid in a central heating station comprising: means defining a combustion chamber; at least one heat exchanger traversed by said fluid in said combustion chamber; at least one burner opening into said combustion chamber for generating combustion gases therein passing into contact with said heat exchanger; means forming a combustion gas outlet from said chamber; and control means for maintaining the temperature at which said combustion gas contacts said heat exchanger at least in the region of said outlet above the dewpoint of corrosive components of the combustion gas, said control means including means for the selective combustion of a fuel and of a fuel composition producing large quantities of corrosive components upon combustion.
Claim 9
Independent Claim
123 words
An apparatus for the heating of a recirculated heat-transfer fluid in a central heating station comprising: means defining a combustion chamber; at least one heat exchanger traversed by said fluid in said combustion chamber; at least one burner opening into said combustion chamber for generating combustion gases therein passing into contact with said heat exchanger; means forming a combustion gas outlet from said chamber; and control means for maintaining the temperature at which said combustion gas contacts said heat exchanger at least in the region of said outlet above the dewpoint of corrosive components of the combustion gas, said control means including means for the selective combustion of a fuel and of a fuel composition producing large quantities of corrosive components upon combustion.
Claim 10
Dependent Claim
39 words
The apparatus defined in claim 7 wherein said control means includes a temperature sensor on said heat exchanger, a controller connected to said temperature sensor, and a switchover device for selecting between combustion of fuel and said fuel composition.
Claim 11
Dependent Claim
32 words
The apparatus defined in claim 8 wherein two burners are provided for selective operation by said switchover means, one of said burners burning said fuel and the other burner burning said composition.
Claim 12
Dependent Claim
31 words
The apparatus defined in claim 8 wherein a single burner is provided with inlets for said fuel and said composition, said switchover means selectively communicating between said inlets and said burner.
Claim 13
Dependent Claim
11 words
The apparatus defined in claim 8 wherein said fluid is oil.
Claim 14
Dependent Claim
19 words
The apparatus defined in claim 8 wherein said temperature sensor is disposed on said heat exchanger adjacent said outlet.
Claim 15
Dependent Claim
41 words
The apparatus defined in claim 8 wherein said heat exchanger defines a combustion chamber coaxial with said burner, a flow-direction-changing chamber ahead of said burner, and a combustion gas discharge chamber coaxial with said combustion chamber and communicating with said outlet.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |