Electric heating device

Abstract

The utility model provides an electric heating device, which comprises a shell, an electric heating element and a heating element, the electric heater is arranged at the top of the shell; the electric heater is connected with an electric heating pipe, the electric heating pipe is inserted into the heating space, and the electric heating pipe extends in the length direction of the shell; the liquid level control line is arranged on the shell; when the heating space is filled with the raw material medium, the liquid level of the raw material medium is higher than the liquid level control line, and the part, lower than the liquid level control line, of the electric heating pipe can emit heat and heat the raw material medium. According to the utility model, the technical problem that the service life of the electric heater is influenced due to large surface load and concentrated heat of the electric heater caused by space limitation of the side insertion form of the electric heater of the hydrogen production part in the conventional methanol hydrogen production device is solved. The electric heating pipe is vertically inserted in the length direction of the shell, so that heating concentration and local overheating of the electric heating pipe are effectively avoided, and the service life of the electric heating pipe is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to an electric heating device. Background Art

[0002] As the limitations of conventional energy sources become increasingly prominent, the world is facing the dual challenges of resource scarcity and environmental pollution. Energy conservation and environmental protection have become the focus of attention from all walks of life. Actively exploring new energy sources is of great significance to the times. Hydrogen, as an ideal clean energy source, produces only water after complete combustion. It is currently widely used in chemical, pharmaceutical, metallurgical, food processing and other fields. There are many ways to prepare hydrogen. Among them, methanol hydrogen production has become the first choice in many fields due to its wide source of raw materials, low operating costs, and distributed layout. In the methanol hydrogen production device, the side insertion of the electric heater of the hydrogen production part is limited by space, resulting in a large surface load and concentrated heat on the electric heater, which affects the service life of the electric heater.

[0003] The problem is that in conventional methanol-to-hydrogen devices, the side insertion of the electric heater in the hydrogen production part is limited by space, resulting in a large surface load and concentrated heat on the electric heater, which affects the service life of the electric heater. Utility Model Content

[0004] The utility model solves the technical problem in conventional methanol-to-hydrogen devices where the side-insertion of the electric heater in the hydrogen production section is limited by space, resulting in a heavy load on the heater surface and concentrated heat, which in turn shortens the heater's service life. By inserting the electric heating tube vertically along the length of the shell, the load on the heater surface is reduced, and disturbed convection within the shell is increased, effectively avoiding concentrated heat and localized overheating in the heater, thereby achieving the technical effect of extending the heater's service life.

[0005] In order to solve the above problems, the utility model provides an electric heating device, comprising: a shell, a heating space is provided inside the shell; an electric heater, the electric heater is provided on the top of the shell; the electric heater is connected to an electric heating tube, the electric heating tube is inserted into the heating space, and the electric heating tube extends along the length direction of the shell; a liquid level control line, the liquid level control line is provided in the shell; wherein, when the heating space is filled with a raw material medium, the liquid level height of the raw material medium is higher than the liquid level control line, and the part of the electric heating tube below the liquid level control line can generate heat and heat the raw material medium.

[0006] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: through the design of the liquid level control line, it can ensure that the electric heating tube will not heat above the liquid level of the raw material medium, and will only heat below the liquid level. This can effectively control the heating range and temperature, avoiding energy waste and overheating caused by dry burning of the electric heating tube. At the same time, the method of vertically inserting the electric heating tube along the length of the shell increases the heating area of ​​the electric heating tube for the raw material medium, so that the raw material in the shell can generate sufficient disturbed convection, and increase the stability of the raw material medium.

[0007] In one embodiment of the present invention, a liquid level gauge is installed on the housing, and the liquid level gauge can detect the liquid level height of the raw material medium in the heating space.

[0008] Compared with existing technologies, this solution achieves the following technical benefits: a liquid level gauge can monitor the liquid level of the raw material medium in the heating space in real time. Feedback from the liquid level gauge allows for more precise control of the heating range and heating time of the electric heating tube, avoiding overheating or underheating. This improves the accuracy and stability of the heating process, further saving energy costs, extending equipment life, and increasing production efficiency.

[0009] In one embodiment of the present invention, the shell includes a top end and a bottom end, and the electric heating device further includes a medium inlet, which is arranged at the bottom end; wherein the raw material medium enters the heating space from the medium inlet.

[0010] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: by setting the medium inlet at the bottom end of the shell, the raw material medium can be more conveniently introduced into the heating space, which simplifies the operation process and improves production efficiency.

[0011] In one embodiment of the present invention, the electric heating device further comprises a medium outlet, which is arranged at the top; wherein the heated raw material medium leaves the heating space from the medium outlet.

[0012] Compared with existing technologies, this technical solution achieves the following advantages: by providing a media outlet at the top, the raw material medium can be fully heated within the heating space after entering through the media inlet at the bottom, allowing the heated raw material medium to exit the heating space more smoothly, thereby improving production efficiency. Furthermore, the provision of the media outlet allows for better control of the discharge flow rate and location of the raw material medium, facilitating the continuity and stability of the production process.

[0013] In one embodiment of the present invention, the medium inlet is provided at the bottom or side of the housing.

[0014] Compared with existing technologies, this solution achieves the following technical benefits: Locating the medium inlet at the bottom or side of the shell effectively improves the flow path of the raw material medium, facilitating its uniform distribution and circulation within the heating space, and enhancing heating efficiency and uniformity. This also promotes better contact between the raw material medium and the heating tube, accelerating heating and reducing energy waste.

[0015] In one embodiment of the present invention, a support plate is installed in the heating space, and the support plate is connected to the inner wall of the shell; wherein, when the electric heating tube is inserted into the heating space, the support plate can support and fix the electric heating tube.

[0016] Compared with existing technologies, this technical solution achieves the following benefits: by installing a support plate within the heating space and connecting it to the inner wall of the housing, the electric heating tube can be effectively fixed and supported, preventing it from shaking or shifting during operation, ensuring the stability and safety of the heating process. This can effectively reduce the failure rate during equipment operation and extend the service life of the equipment. Furthermore, the provision of the support plate also facilitates space utilization within the heating space and improves heating uniformity, thereby enhancing heating efficiency.

[0017] In an embodiment of the present invention, a plurality of electric heating tubes are provided, one end of each of the electric heating tubes is connected to the electric heater, and the other end is fixed to the support plate.

[0018] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: by providing multiple electric heating tubes and fixing them to the support plate, the heating area and heating power within the heating space can be increased, improving the heating efficiency and heating speed of the electric heating device. In addition, the multiple electric heating tubes can be more evenly distributed within the heating space, making the heating of the raw material medium more uniform and reducing local overheating or overcooling caused by uneven heat. At the same time, the provision of multiple electric heating tubes also improves the reliability of the equipment. If one electric heating tube fails, the other electric heating tubes can still continue to work, ensuring the continuity of the equipment's production.

[0019] In an embodiment of the present invention, a plurality of baffles are installed in the heating space, and the plurality of baffles are connected to the inner wall of the shell.

[0020] Compared with existing technologies, this technical solution achieves the following technical benefits: by installing multiple baffles within the heating space and connecting them to the inner wall of the shell, the flow path and direction of the raw material medium within the heating space can be effectively improved, increasing the contact area between the medium and the electric heating tube, and improving heating efficiency and uniformity. The installation of the baffles can effectively disrupt the flow state of the raw material medium, promoting a more uniform flow of the medium, and avoiding local dead spots and excessive temperature gradients. At the same time, the baffles also serve to disperse the flow of the medium, allowing the medium to circulate more stably within the heating space, thereby improving the heating effect.

[0021] In one embodiment of the present invention, the length of the baffle is greater than the length of the radius of the inner wall of the shell.

[0022] Compared with the existing technology, the technical effect achieved by adopting this technical solution is: the length of the baffle is greater than the length of the radius of the inner wall of the shell, which means that the baffle has a wider coverage range in the heating space, can better guide the flow of the raw material medium, and further improve the heating efficiency and heating uniformity.

[0023] In one embodiment of the present invention, a plurality of baffles are distributed in the heating space at intervals and in an interlaced manner along the length direction of the shell; wherein a flow gap is provided between one side of each baffle and the inner wall of the shell.

[0024] Compared to existing technologies, this technical solution achieves the following benefits: Multiple baffles are staggered along the length of the housing and provide flow gaps between them and the inner wall, effectively improving the flow path and direction of the raw material medium within the heating space. This promotes a more complex flow path between the baffles, increasing the contact area between the medium and the heating tube, improving heating efficiency and uniformity. Furthermore, the provision of flow gaps ensures smooth flow of the medium between the baffles, preventing flow obstruction and further enhancing the heating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of an electric heating device provided in an embodiment of the utility model.

[0026] Description of reference numerals:

[0027] 11-shell; 12-heating space; 13-electric heater; 14-electric heating tube; 15-liquid level control line; 16-top end; 17-bottom end; 18-medium inlet; 19-medium outlet; 20-support plate; 21-baffle. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] See also Figure 1 This embodiment provides an electric heating device, including: a shell 11, an electric heater 13 and a liquid level control line 15, wherein a heating space 12 is provided inside the shell 11; the electric heater 13 is provided on the top of the shell 11; the electric heater 13 is connected to an electric heating tube 14, the electric heating tube 14 is inserted into the heating space 12, and the electric heating tube 14 extends along the length direction of the shell 11; the liquid level control line 15 is provided in the shell 11; wherein, when the heating space 12 is filled with a raw material medium, the liquid level height of the raw material medium is higher than the liquid level control line 15, and the portion of the electric heating tube 14 below the liquid level control line 15 can generate heat and heat the raw material medium.

[0030] Specifically, in this embodiment, the interior of the shell 11 is hollow to form a heating space 12, and the top of the shell 11 is open. The electric heater 13 is connected to an electric heating tube 14, and the electric heating tube 14 is vertically inserted into the heating space 12 along the length direction of the shell 11 from the top opening. A liquid level control line 15 is provided on the shell 11. When the raw material medium is added, the liquid level of the raw material medium should be higher than the liquid level control line 15. The portion of the electric heating tube 14 below the liquid level control line 15 can generate heat and heat the raw material medium. By completely immersing the heating portion of the electric heating tube 14 in the raw material medium, dry burning of the electric heating tube 14 is avoided, thereby increasing the service life of the electric heating tube 14. In this embodiment, the raw material medium includes a liquid medium, a steam medium and a solid catalyst medium.

[0031] Furthermore, the housing 11 is equipped with a liquid level gauge, which can detect the liquid level of the raw material medium in the heating space 12 .

[0032] Specifically, the installation of a liquid level meter can monitor the liquid level of the raw material medium in the shell 11 in real time. When the raw material medium in the shell 11 is insufficient, the electric heating device can replenish the raw material medium in time, thereby preventing the liquid level of the raw material medium from being lower than the heating part of the electric heating tube 14, causing the electric heating tube 14 to dry burn.

[0033] Furthermore, the shell 11 includes a top end 16 and a bottom end 17 , and the electric heating device further includes a medium inlet 18 , which is provided at the bottom end 17 ; wherein the raw material medium enters the heating space 12 from the medium inlet 18 .

[0034] Specifically, in this embodiment, the housing 11 includes a top end 16 and a bottom end 17. The top end 16 is located on one side of the housing 11 near the electric heater 13, and the bottom end 17 is located on the other side. A medium inlet 18 is located at the bottom end 17, and the raw medium can enter the heating space 12 through the medium inlet 18.

[0035] Furthermore, the electric heating device further includes a medium outlet 19 , which is provided at the top end 16 ; wherein the heated raw material medium leaves the heating space 12 through the medium outlet 19 .

[0036] Specifically, the medium outlet 19 is provided on the side of the top end 16 of the shell 11 . The raw medium enters the heating space 12 from the medium inlet 18 , is heated by the electric heating tube 14 , and then is discharged from the heating space 12 from the medium outlet 19 at the top end 16 .

[0037] Furthermore, the medium inlet 18 is provided at the bottom or side of the housing 11 .

[0038] Specifically, in this embodiment, the medium inlet 18 is disposed at the bottom or side of the housing 11, which can effectively improve the flow path of the raw material medium. The raw material medium flows from the bottom to the top, which is conducive to the uniform distribution and circulation of the raw material medium in the heating space.

[0039] Furthermore, a support plate 20 is installed in the heating space 12 , and the support plate 20 is connected to the inner wall of the shell 11 ; wherein, when the electric heating tube 14 is inserted into the heating space 12 , the support plate 20 can support and fix the electric heating tube 14 .

[0040] Specifically, in this embodiment, a support plate 20 is provided near the medium inlet 18 of the heating space 12. When the electric heating tube 14 is vertically inserted into the heating space 12 along the length of the housing 11, one end of the electric heating tube 14 is connected and fixed to the electric heater 13, and the other end is fixed to the support plate 20. The support plate 20 and the electric heater 13 jointly connect and fix the electric heating tube 14. The support plate 20 is connected to the inner wall of the housing 11, which can effectively prevent the electric heating tube 14 from shaking or shifting during operation.

[0041] Furthermore, a plurality of electric heating tubes 14 are provided, one end of each of the electric heating tubes 14 is connected to the electric heater 13 , and the other end is fixed to the support plate 20 .

[0042] Specifically, in the present embodiment, a plurality of electric heating tubes 14 are provided, and the plurality of electric heating tubes 14 are vertically inserted into the heating space 12 along the length direction of the shell 11. The vertical insertion method allows for the insertion of a greater number of electric heating tubes 14, thereby increasing the area of ​​the raw material medium to be heated, enabling the raw material medium in the shell 11 to be more fully heated, and enabling the raw material medium in the shell 11 to be fully disturbed, thereby ensuring the stability of the raw material medium concentration during long-term operation. Among them, disturbed convection refers to the instability phenomenon inside the fluid caused by temperature differences when the liquid is heated. When the liquid is heated, a temperature gradient is formed, resulting in a change in density, thereby generating convective motion. Disturbed convection refers to the presence of small disturbances or irregularities in the fluid during this convective motion, which may cause the fluid motion to become more complex and difficult to predict. This disturbed convection usually affects the stability of heat transfer and fluid motion.

[0043] Furthermore, a plurality of baffles 21 are installed in the heating space 12 , and the plurality of baffles 21 are connected to the inner wall of the shell 11 .

[0044] Specifically, in this embodiment, a plurality of baffles 21 are staggeredly installed on the inner wall of the shell 11. The staggered baffles 21 can change the flow path and flow direction in the heating space 12, thereby increasing the contact area and contact time between the raw material medium and the electric heating tube 14, and making the raw material medium heated more evenly.

[0045] Furthermore, the length of the baffle 21 is greater than the length of the radius of the inner wall of the shell 11 .

[0046] Specifically, in this embodiment, the length of the baffle 21 is greater than the length of the radius of the inner wall of the shell 11, which can make the raw material medium flow more evenly in the heating space 12 and make the raw material medium circulate more stably in the heating space 12.

[0047] Furthermore, a plurality of baffles 21 are distributed in the heating space 12 at intervals and in an interlaced manner along the length direction of the shell 11 ; wherein a flow gap is provided between one side of each baffle 21 and the inner wall of the shell 11 .

[0048] Specifically, in this embodiment, multiple baffles 21 are staggered and spaced along the length of the housing 11, effectively increasing the flow path of the feed medium, thereby more fully heating the feed medium and improving the heating efficiency and uniformity of the electric heating device. A flow gap is defined between one side of each baffle 21 and the inner wall of the housing 11. This flow gap ensures smooth flow of the feed medium between the baffles 21, preventing flow obstruction and further enhancing the heating effect.

[0049] Although the present invention is disclosed as above, it is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope defined by the claims.

Claims

1. An electric heating device, characterized in that: include: A housing (11), wherein a heating space (12) is provided inside the housing (11); An electric heater (13), the electric heater (13) being arranged on the top of the shell (11); the electric heater (13) being connected to an electric heating tube (14), the electric heating tube (14) being inserted into the heating space (12), and the electric heating tube (13) extending along the length direction of the shell (11); a liquid level control line (15), the liquid level control line (15) being arranged on the housing (11); When the heating space (12) is filled with a raw material medium, the liquid level of the raw material medium is higher than the liquid level control line (15), and the portion of the electric heating tube (14) below the liquid level control line (15) can generate heat and heat the raw material medium.

2. The electric heating device according to claim 1, characterized in that: The housing (11) is equipped with a liquid level meter, which can detect the liquid level height of the raw material medium in the heating space (12).

3. The electric heating device according to claim 1, characterized in that: The housing (11) includes a top end (16) and a bottom end (17), and the electric heating device further includes a medium inlet (18), and the medium inlet (18) is provided at the bottom end (17); The raw material medium enters the heating space (12) from the medium inlet (18).

4. The electric heating device according to claim 3, characterized in that: The electric heating device further comprises a medium outlet (19), wherein the medium outlet (19) is provided at the top end (16); The heated raw material medium leaves the heating space (12) from the medium outlet (19).

5. The electric heating device according to claim 3, characterized in that: The medium inlet (18) is provided at the bottom or side of the housing (11).

6. The electric heating device according to claim 1, characterized in that: A support plate (20) is installed in the heating space (12), and the support plate (20) is connected to the inner wall of the shell (11); When the electric heating tube (14) is inserted into the heating space (12), the support plate (20) is capable of supporting and fixing the electric heating tube (14).

7. The electric heating device according to claim 6, characterized in that: A plurality of electric heating tubes (14) are provided, one end of each of the electric heating tubes (14) is connected to the electric heater (13), and the other end is fixed to the support plate (20).

8. The electric heating device according to claim 1, characterized in that: A plurality of baffles (21) are installed in the heating space (12), and the plurality of baffles (21) are connected to the inner wall of the shell (11).

9. The electric heating device according to claim 8, characterized in that: The length of the baffle (21) is greater than the length of the radius of the inner wall of the shell (11).

10. The electric heating device according to claim 9, characterized in that: The plurality of baffles (21) are distributed in the heating space (12) at intervals and in an interlaced manner along the length direction of the shell (11); A flow gap is provided between one side of each baffle (21) and the inner wall of the shell (11).

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