Horizontal heat transfer oil heater

Abstract

The present invention discloses a horizontal heat transfer oil heating furnace, which comprises a shell and a coil assembly. The shell includes an inner shell and an outer shell. A circular cavity and a number of partitions arranged along the length direction of the shell are provided between the inner shell and the outer shell. The partitions divide the circular cavity into an air chamber and a flue gas chamber. A first annular chamber is provided on the outer side of the front end of the outer shell, and second and third annular chambers are provided on the outer side of the rear end of the outer shell. An air outlet is opened in the upper part of the first annular chamber. First through holes are opened on the front end wall surface of the outer shell and at each air chamber. An air inlet is opened in the upper part of the second annular chamber. Second through holes are opened on the rear end wall surface of the outer shell and at each air chamber. A flue gas outlet is opened in the upper part of the third annular chamber. Third through holes are opened on the rear end wall surface of the outer shell and at each flue gas chamber. Fourth through holes are opened on the front end wall surface of the inner shell and at each flue gas chamber. The present invention has a small floor area and high energy efficiency, and is particularly suitable for installation and use on an offshore platform.

Description

Technical Field

[0001] The present invention relates to an organic heat carrier heating furnace, and particularly to a horizontal heat-conducting oil heating furnace. Background Art

[0002] With the continuous development of the economy, the application scope of various heat-conducting oil heating furnaces has been widely promoted and applied. In the market competition, the heating furnaces themselves are also constantly improved and innovated. The three factors of high efficiency, energy conservation, and environmental protection have become the current development direction. The horizontal heat-conducting oil heating furnace is a safe, efficient, and energy-saving heat supply device, which is widely used in the petroleum and chemical industries.

[0003] As an important part of the heat supply system, it is also essential for use on offshore oilfield platforms. However, as the most important factor on the offshore platform, the land area is extremely valuable, and all equipment must strictly control the size. The traditional horizontal heat-conducting oil heating furnace has the following disadvantages during use on offshore oilfield platforms:

[0004] Since the heating furnace and the air preheater are of a split type, the floor area is large; or due to the factor of excessive floor area, the air preheater is cancelled, resulting in low thermal efficiency of the heat-conducting oil heating furnace.

[0005] Since the coils are connected in series, the flow resistance of the medium in the pipes is large, and the energy consumption of the circulation pump is high. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a horizontal heat-conducting oil heating furnace with a compact structure, small floor area, capable of improving the thermal efficiency of the heating furnace, and more suitable for installation and use on offshore platforms.

[0007] To solve the above technical problems, the present invention adopts a horizontal heat-conducting oil heating furnace, which includes a cylindrical shell and a coil assembly. The shell includes an inner shell and an outer shell. The coil assembly is installed in the inner cavity of the inner shell. A closed annular cavity and several partitions arranged along the length direction of the shell are provided between the inner shell and the outer shell. The partitions divide the annular cavity into an air cavity and a flue gas cavity along the radial direction of the annular cavity. The air cavity and the flue gas cavity are arranged at intervals in the annular cavity. A first annular cavity arranged along the circumferential direction of the outer shell is provided outside the front end of the outer shell. A second annular cavity and a third annular cavity arranged along the circumferential direction of the outer shell are provided outside the rear end of the outer shell. An air outlet is opened in the upper part of the first annular cavity. A first through hole is opened on the front end wall surface of the outer shell and at each air cavity. Each air cavity is fluidly connected to the first annular cavity through its corresponding first through hole. An air inlet is opened in the upper part of the second annular cavity. A second through hole is opened on the rear end wall surface of the outer shell and at each air cavity. Each air cavity is fluidly connected to the second annular cavity through its corresponding second through hole. A flue gas outlet is opened in the upper part of the third annular cavity. A third through hole is opened on the rear end wall surface of the outer shell and at each flue gas cavity. Each flue gas cavity is fluidly connected to the third annular cavity through its corresponding third through hole. A fourth through hole is opened on the front end wall surface of the inner shell and at each flue gas cavity. Each flue gas cavity is fluidly connected to the inner cavity of the inner shell through its corresponding fourth through hole.

[0008] As a preferred embodiment of the present invention, the coil assembly includes an inner coil, a middle coil and an outer coil. The front end of the inner coil is connected to the oil inlet pipe, and the rear end of the inner coil is connected to the oil outlet pipe. The front end of the middle coil is connected to the oil inlet pipe, and the rear end of the middle coil is connected to the oil outlet pipe. The front end of the outer coil is connected to the oil inlet pipe, and the rear end of the outer coil is connected to the oil outlet pipe. The inner coil, the middle coil and the outer coil are connected in parallel.

[0009] As a preferred embodiment of the present invention, the horizontal heat-conducting oil heating furnace further includes a burner. The shell further includes a front cover and a rear cover, and the burner is installed on the front cover.

[0010] After adopting the above structure, the present invention has the following beneficial effects:

[0011] Since the housing of the present invention includes an inner housing and an outer housing, a closed annular cavity and several partitions arranged along the length direction of the housing are provided between the inner housing and the outer housing. The partitions divide the annular cavity into an air chamber and a flue gas chamber along the radial direction of the annular cavity. The air chamber and the flue gas chamber are arranged at intervals in the annular cavity. A first annular chamber arranged along the circumferential direction of the outer housing is provided on the outer side of the front end of the outer housing. A second annular chamber and a third annular chamber arranged along the circumferential direction of the outer housing are provided on the outer side of the rear end of the outer housing. An air outlet is provided at the upper part of the first annular chamber. A first through hole is provided on the front end wall of the outer housing and at each air chamber. Each air chamber is fluidly connected to the first annular chamber through its corresponding first through hole. An air inlet is provided at the upper part of the second annular chamber. A second through hole is provided on the rear end wall of the outer housing and at each air chamber. Each air chamber is fluidly connected to the second annular chamber through its corresponding second through hole. A flue gas outlet is provided at the upper part of the third annular chamber. A third through hole is provided on the rear end wall of the outer housing and at each flue gas chamber. Each flue gas chamber is fluidly connected to the third annular chamber through its corresponding third through hole. A fourth through hole is provided on the front end wall of the inner housing and at each flue gas chamber. Each flue gas chamber is fluidly connected to the inner cavity of the inner housing through its corresponding fourth through hole. The above structure forms a plate-type preheater for flue gas-air, and this plate-type preheater and the heating furnace form an integrated structure, which greatly reduces the floor area of the heating furnace and is particularly suitable for installation and use on an offshore platform. At the same time, this integrated structure greatly improves the thermal efficiency of the heating furnace.

[0012] The coil assembly of the present invention includes an inner coil, a middle coil and an outer coil. The front end of the inner coil is connected to the oil inlet pipe, the rear end of the inner coil is connected to the oil outlet pipe, the front end of the middle coil is connected to the oil inlet pipe, the rear end of the middle coil is connected to the oil outlet pipe, the front end of the outer coil is connected to the oil inlet pipe, the rear end of the outer coil is connected to the oil outlet pipe. The inner coil, the middle coil and the outer coil are connected in parallel, with small flow resistance of the medium in the pipe and low energy consumption of the circulation pump.

[0013] The structure of the present invention is compact, with a small floor area, and is very convenient for manufacturing and installation. Brief Description of the Drawings

[0014] The following further details the specific embodiments of the present invention in conjunction with the drawings.

[0015] Figure 1 It is a schematic structural view of a horizontal heat-conducting oil heating furnace of the present invention.

[0016] Figure 2 is Figure 1 The sectional view along line A-A in

[0017] Figure 3 is Figure 1 The enlarged view at B in

[0018] Figure 4 For Figure 1 An enlarged schematic view at position C in Embodiment

[0019] Refer to Figures 1 to 4 A horizontal heat-conducting oil heating furnace shown in the figure, which includes a cylindrical shell and a coil assembly. The shell includes an inner shell 1 and an outer shell 2. The coil assembly is fixedly installed in the inner cavity of the inner shell 1. A closed annular cavity and several partitions 3 arranged along the length direction of the shell are provided between the inner shell 1 and the outer shell 2. The partitions 3 divide the annular cavity into an air chamber 4 and a flue gas chamber 5 along the radial direction of the annular cavity. The air chamber 4 and the flue gas chamber 5 are arranged at intervals in the annular cavity. A first annular chamber 6 arranged along the circumferential direction of the outer shell 2 is provided on the outer side of the front end of the outer shell 2. A second annular chamber 7 and a third annular chamber 8 arranged along the circumferential direction of the outer shell 2 are provided on the outer side of the rear end of the outer shell 2. The second annular chamber 7 and the third annular chamber 8 are arranged at intervals. In the figure, the second annular chamber 7 is located between the first annular chamber 6 and the third annular chamber 8. Of course, the third annular chamber 8 can also be arranged between the first annular chamber 6 and the second annular chamber 7. An air outlet 9 is opened in the upper part of the first annular chamber 6. A first through hole 10 is opened on the front end wall surface of the outer shell 2 and at each air chamber 4. Each air chamber 4 is fluidly connected to the first annular chamber 6 through its corresponding first through hole 10. An air inlet 11 is opened in the upper part of the second annular chamber 7. A second through hole 12 is opened on the rear end wall surface of the outer shell 2 and at each air chamber 4. Each air chamber 4 is fluidly connected to the second annular chamber 7 through its corresponding second through hole 12. A flue gas outlet 13 is opened in the upper part of the third annular chamber 8. A third through hole 14 is opened on the rear end wall surface of the outer shell 2 and at each flue gas chamber 5. Each flue gas chamber 5 is fluidly connected to the third annular chamber 8 through its corresponding third through hole 14. A fourth through hole 15 is opened on the front end wall surface of the inner shell 1 and at each flue gas chamber 5. Each flue gas chamber 5 is fluidly connected to the inner cavity of the inner shell 1 through its corresponding fourth through hole 15. The above structure forms a plate-type preheater for flue gas-air, and this plate-type preheater and the heating furnace form an integral structure. In the present invention, a heat-insulating material layer 24 is further provided on the shell, and a saddle 25 is provided at the bottom.

[0020] As a preferred embodiment of the present invention, as Figure 1As shown, the coil assembly includes an inner coil 16, a middle coil 17, and an outer coil 18. The inner coil 16, middle coil 17, and outer coil 18 of the present invention are all horizontal spiral coils. The front end of the inner coil 16 is connected to the oil inlet pipe 19, and the rear end of the inner coil 16 is connected to the oil outlet pipe 20. The front end of the middle coil 17 is connected to the oil inlet pipe 19, and the rear end of the middle coil 17 is connected to the oil outlet pipe 20. The front end of the outer coil 18 is connected to the oil inlet pipe 19, and the rear end of the outer coil 18 is connected to the oil outlet pipe 20. The inner coil 16, middle coil 17, and outer coil 18 are connected in parallel.

[0021] As a preferred embodiment of the present invention, as Figure 1 shown, the horizontal heat-conducting oil heating furnace further includes a burner 21. The burner 21 preferably uses gas as fuel. The housing further includes a front cover 22 and a rear cover 23. The burner 21 is fixedly installed on the front cover 22.

[0022] See Figure 1 , when the present invention works, the heat-conducting oil enters from the oil inlet pipe 19 at the front of the housing and flows into the parallel-connected inner coil 16, middle coil 17, and outer coil 18 from front to back. After the heat-conducting oil exchanges heat with the high-temperature flue gas in a radiation and convection manner and is heated to the designed temperature, it is output from the oil outlet pipe 20 at the rear of the housing. The high-temperature flue gas flows through the inner coil 16, middle coil 17, and outer coil 18 after radiative heat transfer in the furnace and then flows out of the furnace through the flue gas outlet 13 after exchanging heat with the air in the flue gas chamber 5 and the air chamber 4. The air flows through the air chamber 4 through the air inlet 11 and exchanges heat with the flue gas in a countercurrent manner. After the air exchanges heat, it flows out of the furnace through the air outlet 9. The flue gas and air of the present invention perform countercurrent convective heat transfer, with a large logarithmic temperature difference for heat exchange and a large heat transfer amount.

[0023] After trial use, the present invention has a small floor area, high energy efficiency, and small medium flow resistance, and is particularly suitable for installation and use on an offshore platform.

Claims

1. A horizontal heat-conducting oil heating furnace, comprising a cylindrical shell and a coil assembly, characterized in that: the shell comprises an inner shell (1) and an outer shell (2), the coil assembly is installed in the inner cavity of the inner shell (1), a closed annular cavity and a plurality of partitions (3) arranged along the length direction of the shell are provided between the inner shell (1) and the outer shell (2), the partitions (3) divide the annular cavity into an air chamber (4) and a flue gas chamber (5) along the radial direction of the annular cavity, the air chamber (4) and the flue gas chamber (5) are arranged at intervals in the annular cavity, a first annular chamber (6) arranged along the circumferential direction of the outer shell (2) is provided on the outer side of the front end of the outer shell (2), a second annular chamber (7) and a third annular chamber (8) arranged along the circumferential direction of the outer shell (2) are provided on the outer side of the rear end of the outer shell (2), an air outlet (9) is opened in the upper part of the first annular chamber (6), a first through hole (10) is opened on the front end wall surface of the outer shell (2) and at each air chamber (4), each air chamber (4) is fluidly connected to the first annular chamber (6) through its corresponding first through hole (10), an air inlet (11) is opened in the upper part of the second annular chamber (7), a second through hole (12) is opened on the rear end wall surface of the outer shell (2) and at each air chamber (4), each air chamber (4) is fluidly connected to the second annular chamber (7) through its corresponding second through hole (12), a flue gas outlet (13) is opened in the upper part of the third annular chamber (8), a third through hole (14) is opened on the rear end wall surface of the outer shell (2) and at each flue gas chamber (5), each flue gas chamber (5) is fluidly connected to the third annular chamber (8) through its corresponding third through hole (14), a fourth through hole (15) is opened on the front end wall surface of the inner shell (1) and at each flue gas chamber (5), each flue gas chamber (5) is fluidly connected to the inner cavity of the inner shell (1) through its corresponding fourth through hole (15); the above structure forms a plate-type preheater for flue gas-air, and the plate-type preheater and the heating furnace form an integral structure, a heat insulation material layer (24) is further provided on the shell, and a saddle (25) is provided at the bottom; the coil assembly comprises an inner coil (16), a middle coil (17) and an outer coil (18), the front end of the inner coil (16) is connected to an oil inlet pipe (19), the rear end of the inner coil (16) is connected to an oil outlet pipe (20), the front end of the middle coil (17) is connected to the oil inlet pipe (19), the rear end of the middle coil (17) is connected to the oil outlet pipe (20), the front end of the outer coil (18) is connected to the oil inlet pipe (19), the rear end of the outer coil (18) is connected to the oil outlet pipe (20), and the inner coil (16), the middle coil (17) and the outer coil (18) are connected in parallel.

2. The horizontal heat-conducting oil heating furnace according to claim 1, characterized in that: The horizontal heat-conducting oil heating furnace further includes a burner (21), and the housing further includes a front cover (22) and a rear cover (23), and the burner (21) is installed on the front cover (22).

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