CN218915392U - Double-layer coil pipe multi-layer furnace wall heating furnace - Google Patents
Double-layer coil pipe multi-layer furnace wall heating furnace Download PDFInfo
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- CN218915392U CN218915392U CN202223372012.6U CN202223372012U CN218915392U CN 218915392 U CN218915392 U CN 218915392U CN 202223372012 U CN202223372012 U CN 202223372012U CN 218915392 U CN218915392 U CN 218915392U
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Abstract
The utility model belongs to the technical field of heating furnaces, and discloses a double-layer coil pipe multi-layer furnace wall heating furnace which comprises a double-layer coil pipe and a multi-layer furnace wall arranged below a convection chamber and positioned in a furnace body; the multi-layer furnace wall comprises an inner layer furnace wall, a middle layer furnace wall and an outer layer furnace wall from inside to outside in sequence; double-layer coils are arranged between the inner furnace wall and the middle furnace wall and between the middle furnace wall and the outer furnace wall for heat exchange. The double-layer coil is adopted, so that the heat transfer area is greatly increased compared with a single-layer coil, and the heat load of the heating furnace is increased under the condition of the same volume; and the double-layer coil is not directly flushed by flame, so that the double-layer coil is heated more uniformly, and the medium in the double-layer coil is not easy to coke. The utility model also has a plurality of layers of furnace walls, so that the tightness of the heating furnace body is greatly improved, and the operation of the heating furnace body is more stable; and the multi-layer furnace wall can reduce heat dissipation loss of the furnace body.
Description
Technical Field
The utility model belongs to the technical field of heating furnaces, and relates to a double-layer coil pipe multi-layer furnace wall heating furnace.
Background
In petrochemical processing, a heating furnace is a basic, indispensable equipment. The heating furnace is important heating equipment in petrochemical equipment, and energy consumption is huge. The energy consumption of the heating furnace is reduced, and the heat efficiency is improved, so that the method has important economic benefit and environmental protection benefit. Most of the coils of the radiation chamber of the existing heating furnace are directly flushed by flame, so that the coils are heated unevenly and easy to coke, the continuous operation time of the heating furnace is seriously limited, the service life of the heating furnace is shortened, and the use safety of the heating furnace is endangered.
The heat load of the heating furnace directly determines the processing capacity of the petrochemical device, so that the heat load of the heating furnace is particularly important under the condition of the same-size structure. According to the current state of scientific technology development, the heat exchange area of the coil is closely related to the heat load of the petrochemical industry heating furnace.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides the double-layer coil pipe multi-layer furnace wall heating furnace, which can improve the heat transfer area of the heating furnace and obtain larger heat load with smaller occupied area.
The utility model adopts the technical scheme that:
a double-layer coil pipe multi-layer furnace wall heating furnace comprises a double-layer coil pipe and a multi-layer furnace wall which is arranged below a convection chamber and positioned in a furnace body; the multi-layer furnace wall comprises an inner layer furnace wall, a middle layer furnace wall and an outer layer furnace wall from inside to outside in sequence; double-layer coils are arranged between the inner furnace wall and the middle furnace wall and between the middle furnace wall and the outer furnace wall for heat exchange.
Further, the inner layer furnace wall, the middle layer furnace wall and the outer layer furnace wall are all cylindrical, and the three are concentric in any cross section.
Further, the top of the inner layer furnace wall is opened, and the bottom of the inner layer furnace wall is fixed at the bottom of the furnace; the top of the middle layer furnace wall is sealed, and the bottom of the middle layer furnace wall is fixed at the bottom of the furnace through a supporting piece; the inner furnace wall is positioned in the middle furnace wall, and a space is reserved between the top ends of the inner furnace wall and the middle furnace wall for passing high-temperature flue gas.
Further, the top of the outer layer furnace wall is a sealing structure, an opening is arranged on the sealing structure and is communicated with a pipeline in the convection chamber; the middle layer furnace wall is positioned in the outer layer furnace wall, a space is reserved between the top ends of the middle layer furnace wall and the outer layer furnace wall, and the bottom end of the middle layer furnace wall is communicated with the space between the outer layer furnace wall; the bottom of the outer layer furnace wall is fixed at the bottom of the furnace.
Further, the double-layer coil pipe is of a double-same-direction spiral structure.
Further, the top of the double-layer coil pipe arranged between the middle layer furnace wall and the outer layer furnace wall is connected with the internal pipeline of the convection chamber.
Further, the double-layer coil pipe spirals downwards along the space between the outer layer furnace wall and the middle layer furnace wall.
Further, after the double-layer coil spirals to be close to the furnace bottom, the rotation radius is slowly reduced, and the double-layer coil after the rotation radius is reduced spirals upwards along the space between the inner layer furnace wall and the middle layer furnace wall, spirals to the top of the middle layer furnace wall and enters the collecting pipe.
Further, the furnace further comprises a burner, wherein the burner is arranged at the bottom of the double-layer coil pipe multi-layer furnace wall heating furnace and is communicated with the inner-layer furnace wall.
The utility model has the advantages of good sealing performance, small heat dissipation loss, high heat transfer efficiency, uniform heating, difficult coking, small occupied area and high heat load. Firstly, a double-layer coil is adopted, so that the heat transfer area is greatly increased compared with a single-layer coil, and the heat load of a heating furnace is increased under the condition of the same volume; and the double-layer coil is not directly flushed by flame, so that the double-layer coil is heated more uniformly, and the medium in the double-layer coil is not easy to coke. The heat exchange area of the furnace body is greatly increased, and the heat load of the heating furnace is increased. Secondly, the multi-layer furnace wall is arranged, so that the tightness of the heating furnace body is greatly improved, and the operation of the heating furnace body is more stable; and the multi-layer furnace wall can reduce heat dissipation loss of the furnace body.
Drawings
FIG. 1 is a cross-sectional view of the present utility model;
FIG. 2a is a three-dimensional top view of a double layer coil of the present utility model;
FIG. 2b is a top three-dimensional view of the double layer coil of the present utility model;
FIG. 2c is a bottom three-dimensional view of the double layer coil of the present utility model;
fig. 3 is a three-dimensional cross-sectional view of the present utility model.
In the figure: 1 a burner; 2 an inner layer furnace wall; 3, a middle layer furnace wall; 4, an outer layer furnace wall; 5 double-layer coil pipes; 6, a convection chamber; and 7, a chimney.
Detailed Description
Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.
A double-layer coil pipe and multi-layer furnace wall efficient energy-saving heating furnace comprises a burner 1, a multi-layer furnace wall, a double-layer coil pipe 5, a convection chamber 6 and a chimney 7.
The multi-layer furnace wall is positioned in the furnace body and arranged below the convection chamber 6, and is an inner-layer furnace wall 2, a middle-layer furnace wall 3 and an outer-layer furnace wall 4 in sequence from inside to outside, wherein the three layers of furnace walls are cylindrical and concentric in any cross section; a double-layer coil pipe 5 is arranged between the inner layer furnace wall 2 and the middle layer furnace wall 3 and between the middle layer furnace wall 3 and the outer layer furnace wall 4 for heat exchange.
The top of the inner layer furnace wall 2 is open, and the bottom is fixed at the bottom of the furnace. The top of the middle furnace wall 3 is sealed, and the bottom of the middle furnace wall is fixed at the bottom of the furnace through a supporting piece; the inner furnace wall 2 is positioned inside the middle furnace wall 3, and a space is reserved between the top ends of the inner furnace wall and the middle furnace wall for passing high-temperature flue gas. The top sealing structure of the outer furnace wall 4 is provided with an opening which is communicated with a pipeline in the convection chamber 6 and is used for receiving a medium in the convection chamber 6; the bottom of the outer layer furnace wall 4 is fixed at the bottom of the furnace; the middle layer furnace wall 3 is positioned in the outer layer furnace wall 4, a space is reserved between the top ends of the middle layer furnace wall 3 and the outer layer furnace wall 4, and the bottom end of the middle layer furnace wall 3 is communicated with the space between the outer layer furnace wall 4.
The double-layer coil pipe 5 is of a double-same-direction spiral structure, the top of the double-layer coil pipe 5 arranged between the middle layer furnace wall 3 and the outer layer furnace wall 4 is connected with the inner pipeline of the convection chamber 6, the part of the double-layer coil pipe 5 spirals downwards along the space between the outer layer furnace wall 4 and the middle layer furnace wall 3, after the double-layer coil pipe 5 is screwed to the furnace bottom, the rotation radius is slowly reduced, and the double-layer coil pipe 5 after the rotation radius is reduced spirals upwards along the space between the inner layer furnace wall 2 and the middle layer furnace wall 3. Screwed to the top of the middle furnace wall 3 and enters the collecting pipe.
The burner 1 is arranged at the bottom of the multi-layer furnace wall energy-saving efficient heating furnace and is communicated with the inner-layer furnace wall 2, high-temperature smoke is generated by combustion of the burner 1 in the innermost-layer furnace wall 2, the high-temperature smoke rises in the inner-layer furnace wall 2 and is baffled after rising to the top of the middle-layer furnace wall 3, and the baffled high-temperature smoke flows downwards along the space between the middle-layer furnace wall 3 and the inner-layer furnace wall 2 to exchange heat with the double-layer coil pipe 5; the descending smoke is baffled at the bottom of the furnace through the bottom space of the middle furnace wall 3, ascends along the space between the outer furnace wall 4 and the middle furnace wall 3, and exchanges heat with the double-layer coil pipe 5 in the ascending process. And finally, the flue gas rises to the convection chamber 6 from the flue gas of the outer layer furnace wall 4, and is discharged through the chimney 7 after heat exchange between the convection chamber 6 and the double-layer coil 5. The heated medium firstly enters the convection chamber 6, and after heat exchange of the convection chamber 6, enters the spiral double-layer coil 5. Flows to the bottom of the furnace along the double-layer coil 5, and exchanges heat with the flue gas in a countercurrent way in the process; the medium flows upwards along the double-layer coil 5 to the spiral double-layer coil 5 between the inner layer furnace wall 2 and the middle layer furnace wall 3 at the rear edge of the furnace bottom, flows to the top collecting pipe and is led out of the furnace body.
The above examples merely illustrate embodiments of the present utility model and are not to be construed as limiting the scope of the utility model, it being understood that variations and modifications can be made by those skilled in the art without departing from the spirit of the utility model.
Claims (9)
1. A double-layer coil pipe multi-layer furnace wall heating furnace comprises a double-layer coil pipe (5) and a multi-layer furnace wall arranged below a convection chamber (6) and positioned in a furnace body; the multi-layer furnace wall is characterized in that the multi-layer furnace wall sequentially comprises an inner layer furnace wall (2), an intermediate layer furnace wall (3) and an outer layer furnace wall (4) from inside to outside; double-layer coils (5) are arranged between the inner layer furnace wall (2) and the middle layer furnace wall (3) and between the middle layer furnace wall (3) and the outer layer furnace wall (4) for heat exchange.
2. The double-layer coil pipe multi-layer furnace wall heating furnace according to claim 1, wherein the inner layer furnace wall (2), the middle layer furnace wall (3) and the outer layer furnace wall (4) are all cylindrical, and the three are concentric in any cross section.
3. The double-layer coil pipe multi-layer furnace wall heating furnace according to claim 2, wherein the top of the inner layer furnace wall (2) is opened, and the bottom of the inner layer furnace wall is fixed at the furnace bottom; the top of the middle layer furnace wall (3) is sealed, and the bottom of the middle layer furnace wall is fixed at the bottom of the furnace through a supporting piece; the inner furnace wall (2) is positioned inside the middle furnace wall (3), and a space is reserved between the top ends of the inner furnace wall and the middle furnace wall for passing high-temperature flue gas.
4. A double-layer coil pipe multi-layer furnace wall heating furnace according to any one of claims 1 to 3, wherein the top of the outer layer furnace wall (4) is a sealing structure, and an opening is arranged on the sealing structure and is communicated with a pipeline in the convection chamber (6); the middle layer furnace wall (3) is positioned in the outer layer furnace wall (4), a space is reserved between the top ends of the middle layer furnace wall and the outer layer furnace wall, and the bottom end of the middle layer furnace wall (3) is communicated with the space between the outer layer furnace wall (4); the bottom of the outer layer furnace wall (4) is fixed at the bottom of the furnace.
5. The double-layer coil pipe multi-layer furnace wall heating furnace according to claim 4, wherein the double-layer coil pipe (5) is of a double-same-direction spiral structure.
6. A double-coil multi-layer furnace wall heating furnace according to claim 5, characterized in that the top of the double-layer coil (5) arranged between the middle-layer furnace wall (3) and the outer-layer furnace wall (4) is connected with the inner pipeline of the convection chamber (6).
7. A double-coil multi-layer furnace wall heating furnace according to claim 6, wherein the double-layer coil (5) spirals down between the outer layer furnace wall (4) and the middle layer furnace wall (3).
8. A double-layer coil multi-layer furnace wall heating furnace according to claim 7, wherein the double-layer coil (5) is coiled to be close to the furnace bottom, the rotation radius is gradually reduced, the double-layer coil (5) with the reduced rotation radius is coiled upwards along the space between the inner-layer furnace wall (2) and the middle-layer furnace wall (3), and is screwed to the top of the middle-layer furnace wall (3) to enter the collecting pipe.
9. The double-layer coil multi-layer furnace wall heating furnace according to claim 8, further comprising a burner (1), wherein the burner (1) is arranged at the bottom of the double-layer coil multi-layer furnace wall heating furnace and is communicated with the inner furnace wall (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223372012.6U CN218915392U (en) | 2022-12-15 | 2022-12-15 | Double-layer coil pipe multi-layer furnace wall heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223372012.6U CN218915392U (en) | 2022-12-15 | 2022-12-15 | Double-layer coil pipe multi-layer furnace wall heating furnace |
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| CN218915392U true CN218915392U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223372012.6U Active CN218915392U (en) | 2022-12-15 | 2022-12-15 | Double-layer coil pipe multi-layer furnace wall heating furnace |
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| CN (1) | CN218915392U (en) |
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- 2022-12-15 CN CN202223372012.6U patent/CN218915392U/en active Active
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