CN220524650U - Tubular heating furnace - Google Patents
Tubular heating furnace Download PDFInfo
- Publication number
- CN220524650U CN220524650U CN202321908215.4U CN202321908215U CN220524650U CN 220524650 U CN220524650 U CN 220524650U CN 202321908215 U CN202321908215 U CN 202321908215U CN 220524650 U CN220524650 U CN 220524650U
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- furnace
- tube
- heating element
- temperature
- furnace tube
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 49
- 238000005485 electric heating Methods 0.000 claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 20
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 abstract description 3
- 239000001569 carbon dioxide Substances 0.000 abstract description 3
- 150000003568 thioethers Chemical class 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 2
- 239000011449 brick Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 241001669679 Eleotris Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Landscapes
- Resistance Heating (AREA)
Abstract
The application discloses tubular heating furnace, it includes: the radiation chamber comprises a bottom wall, a top wall and side walls, and the bottom wall, the top wall and the side walls jointly form an accommodating space; the furnace tube is positioned in the accommodating space and is used for allowing a process medium to be heated to pass through; the electric heating element is positioned in the accommodating space and used for heating the furnace tube; the temperature sensor is used for detecting the temperature of the medium to be heated and/or the temperature of the furnace tube; and the controller is connected with the electric heating element and the temperature sensor and is used for adjusting the heating power of the electric heating element according to the detection result of the temperature sensor. According to the tubular heating furnace, zero emission of sulfides, nitrogen oxides, smoke dust and carbon dioxide can be realized.
Description
Technical Field
The application relates to the technical field of petrochemical industry, in particular to a tubular heating furnace.
Background
The tubular heating furnace is a process or heat carrier flame heating furnace used in industries such as oil refining, chemical industry, oil field, long-distance pipeline and the like. The tube heating furnace generates heat source by burning fuel gas or fuel oil, and generally consists of a radiation chamber, a convection chamber, a burner, a waste heat recovery system, a smoke duct system and the like.
For the tubular heating furnaces, the control of the heating furnace has technical problems of multiple variables, nonlinearity, pure hysteresis, multiple constraints, multiple target regulation and control and the like due to the process characteristics and the system composition of the device in which the heating furnace is positioned, and the 'safe, stable, long, full and excellent' operation of the heating furnace cannot be ensured. In addition, due to its fuel composition, emissions of sulfides, nitrogen oxides, smoke and a large amount of carbon dioxide are caused.
There is therefore a need for an improvement which at least partially solves the above mentioned problems.
Disclosure of Invention
In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the utility model is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to solve the above problems at least in part, the present utility model provides a tube heating furnace comprising:
the radiation chamber comprises a bottom wall, a top wall and side walls, and the bottom wall, the top wall and the side walls jointly form an accommodating space;
the furnace tube is positioned in the accommodating space and is used for allowing a medium to be heated to pass through;
the electric heating element is positioned in the accommodating space and used for heating the furnace tube;
the temperature sensor is used for detecting the temperature of the medium to be heated and/or the temperature of the furnace tube;
and the controller is connected with the electric heating element and the temperature sensor and is used for adjusting the heating power of the electric heating element according to the detection result of the temperature sensor.
Illustratively, the electrical heating element is located on at least one of the side walls and/or the bottom wall for radiating heat to the receiving space.
Illustratively, the heating element at least partially encases the furnace tube.
Illustratively, the electrical heating element comprises a resistive wire and/or a resistive tape.
Illustratively, the tubular heating furnace further comprises a power regulator, the controller is connected with the electric heating element through the power regulator, and the controller is used for regulating the heating power of the electric heating element through the power regulator.
Illustratively, the controller is a programmable logic controller.
Illustratively, the temperature sensor includes at least one thermocouple.
The temperature sensor is also used for detecting the temperature in the accommodating space.
Illustratively, the bottom wall, the top wall, and the inner side of the side wall are each provided with a refractory lining.
Illustratively, the furnace tube is a riser, a sleeper tube, or a spiral tube;
the radiation chamber is cylindrical or square box-shaped.
According to the tubular heating furnace, the electric heating element is used for heating the process medium in the furnace tube, and fuel is not required to be used for combustion, so that zero emission of sulfides, nitrogen oxides, smoke dust and carbon dioxide is realized. The control problems of multivariable, nonlinear, pure hysteresis, multi-constraint and multi-target regulation and control of the flame heating furnace are solved, and the digital intelligent control is realized.
Drawings
The following drawings of the present application are included to provide an understanding of the present application as part of the present application. The drawings illustrate embodiments of the present application and their description to explain the principles and devices of the present application. In the drawings of which there are shown,
FIG. 1 is a schematic view of a tube furnace according to an embodiment of the present application;
reference numerals illustrate:
100-radiation chamber, 110-bottom wall, 120-side wall, 130-top wall, 140-electric heating element, 150-furnace tube, 160, 170, 180-refractory lining.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced without one or more of these details. In other instances, some features well known in the art have not been described in order to avoid obscuring the present application.
It should be understood that the present application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. In the drawings, the size of layers and regions, as well as the relative sizes, may be exaggerated for clarity. Like numbers refer to like elements throughout.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.
Spatially relative terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes any and all combinations of the associated listed items.
Embodiments of the utility model are described herein with reference to cross-sectional illustrations that are schematic illustrations of idealized embodiments (and intermediate structures) of the present application. In this way, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments of the present application should not be limited to the particular shapes shown herein, but rather include deviations in shapes that result, for example, from manufacturing. Thus, the illustrations shown in the figures are schematic in nature, their shapes are not intended to illustrate the actual shape of a device and are not intended to limit the scope of the present application.
A tube furnace according to an embodiment of the present application is illustrated with reference to fig. 1 and includes a radiant chamber 100, a furnace tube 150, an electrical heating element 140, a temperature sensor, and a controller.
The radiation chamber 100 includes a bottom wall 110, a side wall 120, and a top wall 130, where the bottom wall 110, the side wall 120, and the top wall 130 together form a receiving space. The furnace tube 150 is located in the accommodating space, the furnace tube 150 can be a vertical tube, a horizontal tube or a spiral tube, and the furnace tube 150 is used for passing a process medium to be heated; a furnace hanger is disposed in the receiving space to support and fix the furnace 150, and the furnace hanger may be fixed to the bottom wall 110 and/or the top wall 130. The furnace tube 150 is located in the middle of the accommodating space. The radiant chamber 100 may be cylindrical or square box shaped, i.e., the tube furnace may be a cylindrical furnace or square box furnace.
In the embodiment of the present application, the bottom wall 110, the side wall 120 and the top wall 130 are all steel structures, and the inner sides of the bottom wall 110 are all provided with refractory linings, the refractory lining 180 on the inner side of the bottom wall 110 may include refractory bricks and/or refractory castable materials, the refractory lining 160 on the inner side of the side wall 120 may include refractory bricks and/or refractory fibers, and the refractory lining 170 on the inner side of the top wall 130 may include refractory fibers.
In the present embodiment, the heating elements 140 are disposed on the surface of the liner 160 of the sidewall 130, and the heating elements 140 heat the furnace tube 150 by radiation heat transfer. The heating element 140 may be secured to the surface of the liner 160 of the sidewall 130 by anchors or other suitable fasteners. In some embodiments, the heating elements 140 may also be supported on the surface of the liner 180 on the bottom wall 110 on either side of the furnace tube 150. In some embodiments, the heating elements 140 may at least partially encase the furnace tube 150, i.e., the heating elements 140 may be disposed circumferentially around the furnace tube 150, wrapped around the furnace tube 150, to encase some or all of the furnace tube in the receiving space, thereby heating the furnace tube. The electrical heating element 140 may include resistive wires and/or strips and/or other suitable devices capable of converting electrical energy into thermal energy.
In the embodiment of the present application, the temperature sensor is used to detect the temperature of the process medium to be heated in the furnace tube 150 and the temperature of the furnace tube 150. The temperature sensor comprises at least two thermocouples, at least one of which extends partially into the furnace tube 150 to detect the temperature of the process medium to be heated within the furnace tube 150, in particular the outlet temperature of the process medium; at least one thermocouple is connected to the furnace tube 150 for detecting the temperature of the furnace tube 150, i.e., the temperature of the outer wall of the furnace tube 150. In other embodiments, a temperature sensor is also used to detect the temperature in the receiving space within the radiant chamber, i.e., the furnace temperature of the radiant chamber, the temperature sensor including thermocouples disposed on at least one of the bottom wall 110, the side walls 130, and the top wall 120. In other embodiments, the temperature sensor may be used only to detect the temperature of the process medium to be heated or the temperature of the furnace tube 150. In other embodiments, the thermocouple may be replaced with other suitable temperature sensors.
The controller is connected to the electric heating element 140 and the temperature sensor, and is configured to adjust the heating power of the electric heating element 140 according to the detection result of the temperature sensor, so that the temperature of the process medium to be heated in the furnace tube 150 and/or the temperature of the furnace tube 150 are in a specific range, thereby meeting the process requirement. The controller can be a Programmable Logic Controller (PLC) or a singlechip or other suitable control devices, can realize the automatic control of the heating process of the heating furnace, and can realize the stable, accurate and rapid digital intelligent automatic adjustment meeting the heating process requirements of the heating furnace. Preferably, the controller has a PID parameter self-tuning function, and can perform PID algorithm processing on the temperature fed back by the temperature sensor so as to enable the temperature to be in a specific range. In this embodiment, the tube heating furnace further includes a power regulator, and the controller is connected to the electric heating element through the power regulator, and is configured to adjust the heating power of the electric heating element 140 through the power regulator, for example, adjust the voltage or current provided to the electric heating element 140 through the power regulator to adjust the heating power thereof. In some embodiments, the heating element 140 itself has elements for power regulation, and the controller directly controls the heating element 140 to regulate its heating power.
Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above illustrative embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as set forth in the appended claims.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the present application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in order to streamline the application and aid in understanding one or more of the various inventive aspects, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the application. However, the method of this application should not be construed to reflect the following intent: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or units of any method or apparatus so disclosed, may be combined in any combination, except combinations where the features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the present application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims.
Claims (4)
1. A tube furnace, comprising:
the radiation chamber comprises a bottom wall, a top wall and side walls, and the bottom wall, the top wall and the side walls jointly form an accommodating space;
the furnace tube is positioned in the accommodating space and is used for allowing a process medium to be heated to pass through;
the electric heating element is positioned in the accommodating space, is arranged around the furnace tube along the circumferential direction and at least partially coats the furnace tube and is used for heating the furnace tube, and the electric heating element comprises a resistance wire and/or a resistance belt;
the temperature sensor is used for detecting the temperature of the process medium to be heated and/or the temperature of the furnace tube;
the controller is connected with the electric heating element and the temperature sensor and is used for adjusting the heating power of the electric heating element according to the detection result of the temperature sensor;
the tubular heating furnace further comprises a power regulator, the controller is connected with the electric heating element through the power regulator, and the controller is used for regulating the heating power of the electric heating element through the power regulator;
the temperature sensor comprises at least two thermocouples, at least one thermocouple is partially extended into the furnace tube to detect the temperature of the process medium to be heated, and at least one thermocouple is connected with the furnace tube to detect the temperature of the furnace tube.
2. A tube furnace according to claim 1, wherein,
the controller is a programmable logic controller or a singlechip.
3. A tube furnace according to claim 1, wherein,
the bottom wall, the top wall and the inner side of the side wall are all provided with refractory liners.
4. A tube furnace according to claim 1, wherein,
the furnace tube is a vertical tube, a horizontal tube or a spiral tube;
the radiation chamber is cylindrical or square box-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321908215.4U CN220524650U (en) | 2023-07-19 | 2023-07-19 | Tubular heating furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321908215.4U CN220524650U (en) | 2023-07-19 | 2023-07-19 | Tubular heating furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220524650U true CN220524650U (en) | 2024-02-23 |
Family
ID=89934911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321908215.4U Active CN220524650U (en) | 2023-07-19 | 2023-07-19 | Tubular heating furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220524650U (en) |
-
2023
- 2023-07-19 CN CN202321908215.4U patent/CN220524650U/en active Active
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