US3854455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating system providing controlled convective heating
Assignee: Universal Oil Products Co
•
Filing: 1973-12-17
•
Granted: 1974-12-17
•
Expires: 1993-12-17
Abstract
Abstract A special heater design and arrangement utilizes remote burners to provide for the convective heating of fluid streams which are sensitive to overheating. The remote burners together with means to recirculate a portion of the stack gas to admix with the hot combustion gases from the burners provide for the regulation of the temperature of the hot convection gases being passed from the combustion zone to a separate tube heating section. A preferred design and construction of the system utilizes small diameter tubes in the heat transfer section so as to permit thinner wall tubing and also, from safety aspects, will minimize the quantity of a combustible fluid which could be released into a heating chamber in the event of a tube rupture.
Inventors
- 👤 D Carson
- 👤 S Orfanedes
- 👤 K Zentner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:14
CPC Classifications
F; F23; F23C; F23C9/00; F23C9/08; C; C10; C10G; C10G47/00; C10G9/00; C10G9/14; C10G9/18; C10G9/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
272 words
A heating system for heat sensitive fluids to provide uniform heating for the tube banks therein and preclude excessive fluid film temperatures for the fluids passing through the individual tubes, which comprises in combination, a confined tube heating section, a plurality of interconnected small diameter tubular members positioned in said section to provide at least one tube bank therein, inlet and outlet means to the latter to provide for the flow of at least one fluid stream therethrough, at least one combustion section with burner and fuel supply means Connective therewith to provide for the introduction of hot combustion gases into the interior of such section, duct means connecting between said combustion section and the lower end of said heating section to provide for a hot gas convective heating stream to said tubular members therein, waste gas outlet means from the top of said heating section, gas recycle duct means connective between said gas outlet means and said combustion section to provide for waste gas stream mixing with the hot combustion gases therein, gas stream blower means connective with said gas recycle duct means to provide for the pressurized introduction of the recycled waste gas stream into said combustion section and a pressurized convective heating gas flow to said heating section, temperature sensing means in the heating gas stream path to said heating section, and control means connecting with said sensing means and with a flow regulating means in turn connecting with at least one temperature controlling stream being supplied to said combustion section, whereby to regulate temperature for the hot gas convective heating stream being passed to the tube heating section.
Claim 2
Dependent Claim
272 words
A heating system for heat sensitive fluids to provide uniform heating for the tube banks therein and preclude excessive fluid film temperatures for the fluids passing through the individual tubes, which comprises in combination, a confined tube heating section, a plurality of interconnected small diameter tubular members positioned in said section to provide at least one tube bank therein, inlet and outlet means to the latter to provide for the flow of at least one fluid stream therethrough, at least one combustion section with burner and fuel supply means Connective therewith to provide for the introduction of hot combustion gases into the interior of such section, duct means connecting between said combustion section and the lower end of said heating section to provide for a hot gas convective heating stream to said tubular members therein, waste gas outlet means from the top of said heating section, gas recycle duct means connective between said gas outlet means and said combustion section to provide for waste gas stream mixing with the hot combustion gases therein, gas stream blower means connective with said gas recycle duct means to provide for the pressurized introduction of the recycled waste gas stream into said combustion section and a pressurized convective heating gas flow to said heating section, temperature sensing means in the heating gas stream path to said heating section, and control means connecting with said sensing means and with a flow regulating means in turn connecting with at least one temperature controlling stream being supplied to said combustion section, whereby to regulate temperature for the hot gas convective heating stream being passed to the tube heating section.
Claim 3
Dependent Claim
54 words
The heating system of claim 1 further characterized in that said burner means connect with said combustion section to provide a downflow of hot combustion gases therefrom into said duct means connective with said heating section to provide an elongated U-flow path and an upward convective heating gas flow through said tube heating section.
Claim 4
Dependent Claim
53 words
The heating system of claim 1 further characterized in that gas flow valve means is provided in said gas rcycle duct means and control means connects to said valve means and to said temperature control means, whereby recycle gas flow may be regulated responsive to said temperature sensing means and said control means.
Claim 5
Dependent Claim
42 words
The heating system of claim 1 further characterized in that said control means is connective with valve means in the fuel supply means to said burner means, whereby said temperature sensing means and the temperature control means may regulate said burner means.
Claim 6
Dependent Claim
45 words
The heating system of claim 1 further characterized in that said plurality of interconnected small diameter tube members and said heating section are less than about 1 1/2 inches in diameter, whereby to provide small quantities of fluid flow through each of the tube members.
Claim 7
Dependent Claim
48 words
The heating system of claim 1 further characterized in that said plurality of small diameter tubular members are horizontally positioned in said tube heating section whereby to provide flow of fluid therethrough in directions transverse to the direction of the convective heating gas flow in said heating section.
Claim 8
Dependent Claim
39 words
The heating system of claim 1 further characterized in that at least a portion of the plurality of tube members have fin means on their outer surfaces to increase surface area in contact with the convective heating gas flow.
Claim 9
Dependent Claim
43 words
The heating system of claim 1 further characterized in that gas stream flow distributing means is provided transversely across the lower portion of said tube heating section to provide uniform hot gas stream convective heating flow into the inlet end of such section.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |