US3237610A - Double fired multi-path process heater - Google Patents
Double fired multi-path process heater Download PDFInfo
- Publication number
- US3237610A US3237610A US401906A US40190664A US3237610A US 3237610 A US3237610 A US 3237610A US 401906 A US401906 A US 401906A US 40190664 A US40190664 A US 40190664A US 3237610 A US3237610 A US 3237610A
- Authority
- US
- United States
- Prior art keywords
- shield
- setting
- furnace chamber
- port
- radiant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
- C10G9/18—Apparatus
- C10G9/20—Tube furnaces
Definitions
- Fired heaters with several parallel flow paths encounter characteristic design difficulties. Fitting the several flow paths into such a heater can involve complex tube configurations which run up pressure losses and impose a burden on tube costs. Tube costs are especially critical when expensive alloy is employed.
- an outlet manifold is passed through the heater.
- the outlet manifold is positioned within a refractory-lined shield and the interior of the shield is .opened to the atmosphere for cooling. Accordingly, -the material requirements for the outlet manifold are eased. Further, positioning the outlet manifold above the furnace charnber elevates outlet terminal connections to conform with process requirements of most installations.
- FIGURES 1A and 1B are overlapping fragmented, cross-sectional elevation views of a heater which embodies the p-resent invention and taken along line lA of FIGURE III and IB of FIGURE II.
- FIGURE II is a cross-sectional view taken along line A-A of FIGURES IA and IB.
- FIGURE III is a cross-sectional view taken through the radiant furnace chamber of the heater.
- FIGURE IV is a partial cross sectional view taken along line IV-IV of FIGURE II showing the crossover arrangement.
- setting 1 includes oor 2 and wall means shown as vertical cylindrical wall 3 which embraces radiant furnace chamber 4 therewithin. Cylindrical wall 3 is substantially equidistant from a vertical axis.
- Radiant coil generally designated 6 comprises a plurality of inward tubes encircling combustion space 7. Radiant coil 6 further com'pirses rows of outward tubes mounted vertically with each row extending outward from the annular tube configuration to define sector-like outer combustion spaces therebetween. No tubes are mounted against wall 3 which is lined with refractory 9 to prevent excessive heat transfer therethrough.
- Burners of known design are used. Inner burners 11 penetrate floor Z and introduce -fuel and air for combustion in inner space 7. Outer burners 12 likewise fire in outer combustion spaces 8.
- FIG. 1 Patented Mar. 1, 1966 It is a primary objective of this design to double fire the radiant tubes and to allow for many parallel flow paths through Ithe heater.
- Two sets of four parallel flow paths are shown in FIGURES II and IV.
- the radiant coil portion of each set of four flow paths takes up a ninety-degree sector.
- the shown flow paths are typical of the other three ninety-degree (90) sectors so this embodiment has sixteen parallel flow paths in all.
- employing the teaching here set forth it should be understood that more or less than sixteen parallel flow paths can be provided.
- a first path starts with inlet header 5 (seen in FIGURE IB) and includes convection tube bank 13, intermediate crossover 14 inward radiant tubes 16 and intermediate crossover 17 to outlet manifold 18.
- a second path includes downward flow through serpentine convection tube bank 19, intermediate crossover 21, outward radiant tubes 22 and outlet crossover 23 to outlet manifold 18.
- a third path includes downward flow through serpentine convection tube bank 24, intermediate crossover 26, inward radiant tubes 27 and outlet Crossovers 28 to outlet manifold 18.
- a fourth path includes downward flow through serpentine convection tube bank 29, intermediate cross-over 31, outward radiant tubes 32 and outlet crossover 33 to outlet manifold 18.
- Outlet manifold 18 is close enough to radiant coil 6 convection section 34 to keep crossover lengths small; yet, manifold 18 is external to the heater and is air cooled. These features result from mounting the outlet manifold between radiant furnace chamber 4 and convection section 34.
- Shield 36 has ends 37 and 38.
- Setting 1 defines ports 39 and 41. End 37 of the shield is connected in scaled relationship to the setting about port 39. End 38 is connected in sealed relationship to the setting about port 41 so that air is able to circulate through protected space 42 in which outlet manifold 18 lis mounted.
- shield 36 is spaced from wall 3 so that the shield does not prevent exhausting of combustion gases from radiant furnace chamber 4. These combustion gases exit via convection section 34 and a suitable stack.
- a fired heater comprising in combination a vertical cylindrical setting which includes a floor and cylindrical wall and defines a radiant furnace chamber therewithin,
- cylindrical wall describing a vertical axis from which it is substantially equidistant
- a radiant coil in the furnace chamber comprising a plurality of inward tubes mounted vertically to form an annular configuration about the vertical axis
- the radiant coil further comprising at least two rows of outward tubes mounted vertically with each of the rows in a plane which includes the vertical axis,
- At least one inner burner penetrating through the floor and communicating in flow series with the inner combustion space to introduce fuel and air for combustion therein,
- a shield having a first and a second end and positioned horizontally above the furnace chamber
- the shield defining a protected space therewithin
- At least one outlet crossover connected in flow series from the radiant coil to the outlet manifold and penetrating through the shield.
- a fired heater comprising in combination a vertical cylindrical setting which includes a floor ,and a cylindrical wall and defines a radiant furnace chamber therewithin,
- cylindrical wall describing a vertical axis from which it is substantially equidistant
- a radiant coil in the furnace chamber and comprising a plurality of inward tubes mounted vertically to form an annular configuration about the vertical axls,
- the radiant coil further comprising at least two rows of outward tubes -mounted vertically with each of the rows in a plane which includes the vertical axis,
- At least one inner burner penetrating through the floor and communicating in fiow series with the inner combustion space to -introduce fuel and air for combustion therein,
- At least one outer burner for each of the outer combustion spaces each penetrating through the fioor and communicating in fiow series with one of the outer combustion spaces to introduce fuel and air for combustion therein so that all of the tubes in the radiant coil are fired from ltwo sides,
- a shield having a first end and -a second end and positioned horizontally above the furnace chamber
- fiue means remote from the lfurnace chamber and connected in fiow series with the convection section to exhaust combustion ⁇ gases therefrom,
- a convection coil comprising tubes and mounted in the convection section
- the convection coil arranged for circulating a process stream through the convection tubes in a first convection flow path and a second convection fiow path each in parallel flow relationship with the other,
- the radiant coil arranged for circulating the process stream through the radiant tubes in a first radiant flow path and a second radiantfiow path each in parallel fiow relationship -with the other,
- intermediate crossover means for delivering the process stream from the first and Vsecond convection flow paths to the first and second radiant fiow paths respectively
- a first and a second outlet crossover each connected between the radiant coil :and the outlet manifold so as to accommodate exit from the first and second radiant fiow paths respectively to the outlet manifold, the first and the second outlet Crossovers each penetrating through .the shield.
- a fired heater comprising in combination a setting which includes a floor as well as wall means defining a furnace chamber therewithin,
- a radiant coil in the furnace chamber comprising a plurality of tubes mounted vertically, at least one burner penetrating through the setting and cornmunicating with the furnace chamber to introduce fuel and air for combustion therein,
- Va shield having a first and a second end and positioned horizontally above the furnace chamber
- the shield along its length spaced from the wall means to allow passage of combustion gases around the shield for exit from the furnace chamber,
- At least one outlet crossover connected in flow series from the radiant coil to the outlet manifold.
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Gas Burners (AREA)
Description
Claims (1)
- 3. A FIRED HEATER COMPRISING IN COMBINATION A SETTING WHICH INCLUDES A FLOOR AS WELL AS WALL MEANS DEFINING A FURNACE CHAMBER THEREWITHIN, A RADIANT COIL IN THE FURNACE CHAMBER AND COMPRISING A PLURALITY OF TUBES MOUNTED VERTICALLY, AT LEAST ONE BURNER PENETRATING THROUGH THE SETTING AND COMMUNICATING WITH THE FURNACE CHAMBER TO INTRODUCE FUEL AND AIR FOR COMBUSTION THEREIN, A SHIELD HAVING A FIRST AND A SECOND END AND POSITIONED HORIZONTALLY ABOVE THE FURNACE CHAMBER, THE SHIELD EMBRACING A PROTECTED SPACE THEREWITHIN, THE SETTING DEFINING A FIRST PORT AND A SECOND PORT, THE FIRST END OF THE SHIELD CONNECTED IN SEALED RELATIONSHIP TO THE SETTING ABOUT THE FIRST PORT AND THE SECOND END OF THE SHIELD CONNECTED IN SEALED RELATIONSHIP TO THE SETTING ABOUT THE SECOND PORT SO THAT ATMOSPHERIC AIR CAN CIRCULATE THROUGH THE PROTECTED SPACE, THE SHIELD ALONG ITS LENGTH SPACED FROM THE WALL MEANS TO ALLOW PASSAGE OF COMBUSTION GASES AROUND THE SHIELD FOR EXIT FROM THE FURNACE CHAMBER, MEANS FOR CIRCULATING A PROCESS FLUID THROUGH THE RADIANT COIL, AN OUTLET MANIFOLD MOUNTED IN THE PROTECTED SPACE, AT LEAST ONE OUTLET CROSSOVER CONNECTED IN FLOW SERIES FROM THE RADIANT COIL TO THE OUTLET MANIFOLD.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US401906A US3237610A (en) | 1964-10-06 | 1964-10-06 | Double fired multi-path process heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US401906A US3237610A (en) | 1964-10-06 | 1964-10-06 | Double fired multi-path process heater |
Publications (1)
Publication Number | Publication Date |
---|---|
US3237610A true US3237610A (en) | 1966-03-01 |
Family
ID=23589726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US401906A Expired - Lifetime US3237610A (en) | 1964-10-06 | 1964-10-06 | Double fired multi-path process heater |
Country Status (1)
Country | Link |
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US (1) | US3237610A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2222421A1 (en) * | 1973-03-22 | 1974-10-18 | Mitsui Shipbuilding Eng | |
EP0529441A1 (en) * | 1991-08-28 | 1993-03-03 | SELAS-KIRCHNER GmbH | Pyrolysis furnace for the thermal cracking of hydrocarbons |
US20180051906A1 (en) * | 2015-06-30 | 2018-02-22 | Uop Llc | Alternative coil for fired process heater |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2712303A (en) * | 1948-04-23 | 1955-07-05 | Chemical Construction Corp | Fluid heater |
US2898892A (en) * | 1957-07-22 | 1959-08-11 | Sinclair Refining Co | Heater |
US3002505A (en) * | 1958-07-28 | 1961-10-03 | Selas Corp Of America | Tube heater |
US3172739A (en) * | 1962-02-06 | 1965-03-09 | Koniewiez |
-
1964
- 1964-10-06 US US401906A patent/US3237610A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2712303A (en) * | 1948-04-23 | 1955-07-05 | Chemical Construction Corp | Fluid heater |
US2898892A (en) * | 1957-07-22 | 1959-08-11 | Sinclair Refining Co | Heater |
US3002505A (en) * | 1958-07-28 | 1961-10-03 | Selas Corp Of America | Tube heater |
US3172739A (en) * | 1962-02-06 | 1965-03-09 | Koniewiez |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2222421A1 (en) * | 1973-03-22 | 1974-10-18 | Mitsui Shipbuilding Eng | |
EP0529441A1 (en) * | 1991-08-28 | 1993-03-03 | SELAS-KIRCHNER GmbH | Pyrolysis furnace for the thermal cracking of hydrocarbons |
US5271809A (en) * | 1991-08-28 | 1993-12-21 | Selas-Kirchner Gmbh | Pyrolytic furnace for the thermal cracking of hydrocarbons |
US20180051906A1 (en) * | 2015-06-30 | 2018-02-22 | Uop Llc | Alternative coil for fired process heater |
US10330340B2 (en) * | 2015-06-30 | 2019-06-25 | Uop Llc | Alternative coil for fired process heater |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FIRST PENNSYLVANIA BANK N A 19TH FL.CENTRE SQ WEST Free format text: SECURITY INTEREST;ASSIGNOR:SELAS CORPORATION OF AMERICA A CORP OF PA;REEL/FRAME:003997/0981 Effective date: 19820217 |
|
AS | Assignment |
Owner name: SELAS CORPORATION OF AMERICA A CORP. OF PA Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST PENNSYLVANIA BANK N.V., FOR ITSELF AND AS AGENT FOR THE PHILADELPHIA NATIONAL BANK;REEL/FRAME:004096/0520 Effective date: 19821231 |
|
AS | Assignment |
Owner name: LINDE AKTIENGESELLSCAFT WIESBADEN, GERMANY A CORP. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SELAS CORPORATON OF AMERICA A CORP. OF PA;REEL/FRAME:004156/0552 Effective date: 19830523 Owner name: LINDE AKTIENGESELLSCAFT A CORP. OF GERMANY,GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SELAS CORPORATON OF AMERICA A CORP. OF PA;REEL/FRAME:004156/0552 Effective date: 19830523 |