Electric heating structure for dehydrogenation reaction
By designing a maze-type runner in the electric heating structure and alternately setting up electric heating parts and temperature sensors, the problem of uneven heating is solved and an efficient and uniform heating effect is achieved.
Patent Information
- Application Number
- CN202421416719.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-20
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-06-20
AI Technical Summary
The existing electrical heating reaction equipment has problems of uneven heating and excessive local temperature, resulting in incomplete generation and reaction of by-products.
An electric heating structure for dehydrogenation reaction is designed, and a maze-type runner design is formed using heating fins on the upper and lower sides of the middle partition plate. It is arranged alternately with the temperature sensor to balance the fluid pressure through the bus port to ensure heating uniformity and efficiency.
The efficiency and uniformity of heat conduction are improved, the heating efficiency is improved and the reduction of by-products is reduced, and a stable and controllable heating environment is achieved.
Smart Images
Figure CN222805188U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electric heating equipment, in particular to an electric heating structure used for dehydrogenation reaction. Background Art
[0002] Due to environmental pollution and greenhouse effect, the energy structure dominated by traditional carbon-based energy is facing huge challenges. Hydrogen energy is considered to be an alternative energy source for fossil fuels in the future due to its cleanliness, high energy density per unit mass, and wide sources. With the gradual industrialization of hydrogen fuel cell technology, the efficient and carbon-free use of hydrogen energy will also be realized.
[0003] Ammonia is not only an important inorganic chemical product, but also has unique advantages as a hydrogen carrier. There is no carbon emission during the hydrogen production process. It is an efficient, clean and safe hydrogen storage carrier. The decomposition of ammonia is a reversible endothermic reaction. In order to ensure the complete decomposition of ammonia, the reaction must be carried out at a higher temperature. Heating is required to maintain the reaction temperature and provide reaction heat.
[0004] The general requirements of existing electric heating reaction equipment are small size and light weight, so the electric heating power per unit volume is often high, which can easily cause the local temperature of the heater to be too high and uneven heating to occur, resulting in the appearance of by-products in places where the temperature is too high in the heater, and insufficient reaction in places where the temperature is too low. Therefore, it is necessary to develop a new type of electric heating equipment to solve the above problems. Utility Model Content
[0005] The embodiment of the utility model provides an electric heating structure for dehydrogenation reaction to solve the problem of uneven heating of existing heaters.
[0006] The electric heating structure for dehydrogenation reaction provided in the embodiment of the utility model comprises:
[0007] A heating body, the heating body comprising a middle partition, an electric heating element is embedded in the middle partition, an upper chamber and a lower chamber are formed on upper and lower sides of the middle partition respectively, heating fins are arranged in the upper chamber and the lower chamber, the heating fins transfer heat with the middle partition, the heating fins form flow channels in the upper chamber and the lower chamber respectively, and a channel connecting the upper chamber and the lower chamber is arranged on the middle partition;
[0008] an upper plate, the upper plate covering the top of the heating body,
[0009] A lower plate is provided, wherein the lower plate covers the bottom of the heating body.
[0010] In some embodiments, a fluid inlet and / or a fluid outlet are further included, wherein the fluid inlet is arranged on the wall of the lower chamber or the upper chamber, and the fluid outlet is arranged on the upper chamber or on the wall on the same side or different sides of the upper chamber.
[0011] In some embodiments, a plurality of welding grooves are provided on the upper plate and the lower plate, and the plurality of welding grooves correspond to positions of the heating fins and are used to weld and fix the heating fins to the upper plate or the lower plate by welding.
[0012] In some embodiments, a plurality of parallel heating fins form a plurality of flow channels that allow the fluid to flow in the same direction and turn at the side wall of the upper chamber or the lower chamber.
[0013] In some embodiments, a confluence port is provided on the plurality of parallel heating fins, and the confluence port is used to redistribute the fluid within the plurality of flow channels.
[0014] In some embodiments, the depth of the confluence port accounts for 1 / 4 to 3 / 4 of the overall height of the heating fin.
[0015] In some embodiments, the electric heating elements are multiple and are disposed in the horizontal through holes of the middle partition and are evenly distributed in the front-to-back or left-to-right directions of the middle partition.
[0016] In some embodiments, a temperature sensor is further included and arranged in parallel with the electric heating element.
[0017] In some embodiments, the number of the temperature sensors is the same as the number of the electric heating elements, and the temperature sensors and the electric heating elements are arranged alternately.
[0018] In some embodiments, the heating body, the upper plate or the lower plate is made of aluminum or steel, and the heating body is formed by machining or casting.
[0019] Compared with the prior art, the utility model has the following advantages:
[0020] The electric heating structure for dehydrogenation reaction proposed in the embodiment of the utility model forms a labyrinth flow channel design through the heating fins on the upper and lower sides of the middle partition, thereby forming a heating environment for one-way flow of fluid and improving the efficiency and uniformity of heat conduction.
[0021] Furthermore, the alternating arrangement of the electric heating elements and the temperature sensors can effectively control the temperature, which is conducive to quickly, evenly, stably and controllably transferring heat to the heating fins on both sides, thereby effectively improving the heating efficiency.
[0022] Furthermore, a confluence port is provided on the heating fin, which can balance the fluid pressure between the fins in the flow channel, so that the flow rate and flow rate of the fluid between the fins tend to be consistent, and ultimately achieve a technical effect of balanced and efficient heating. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural schematic diagram of an electric heating structure for dehydrogenation reaction provided by an embodiment of the utility model;
[0024] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle A area;
[0025] Figure 3 It is a top view of a heating body provided by an embodiment of the utility model;
[0026] Figure 4 yes Figure 3 Structural schematic diagram of the middle BB section;
[0027] Figure 5 It is a left view of an electric heating structure for dehydrogenation reaction provided by one embodiment of the utility model;
[0028] Figure 6 This is a front view of a dehydrogenation reaction device provided by an embodiment of the utility model;
[0029] Figure 7 It is a three-dimensional schematic diagram of a dehydrogenation reaction device provided by an embodiment of the utility model;
[0030] Figure 8 It is a cross-sectional schematic diagram of a dehydrogenation reaction device provided by an embodiment of the utility model at the position of the filter screen;
[0031] Fig. 9 It is a structural schematic diagram of a filter screen provided in one embodiment of the utility model.
[0032] Notes on the attached drawings:
[0033] 100. Electric heating structure; 110. Heating body; 111. Middle partition; 112. Heating fins; 113. Confluence; 114. Flow channel; 115. Channel; 116. Through hole; 117. Upper chamber; 118. Lower chamber; 120. Upper plate; 121. Welding groove; 130. Lower plate; 131. Welding groove; 140. Fluid inlet; 150. Fluid outlet; 160. Electric heating element; 170. Temperature sensor; 200. Layer plate; 210. Passage; 300. Plug; 400. Filter; 410. Limit plate. DETAILED DESCRIPTION
[0034] Many specific details are described in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific implementation disclosed below.
[0035] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0037] In the description of the present invention, reference terms such as "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present invention.
[0038] The embodiment of the utility model discloses an electric heating structure 100 for dehydrogenation reaction, Figure 1-5 As shown, the electric heating structure 100 includes:
[0039] The heating body 110 includes a middle partition 111, and an electric heating element 160 ( Figure 2 ), the upper and lower sides of the middle partition 111 respectively form an upper chamber 117 and a lower chamber 118 ( Figure 4 ), the upper chamber 117 and the lower chamber 118 are provided with heating fins 112, the heating fins 112 transfer heat with the middle partition 111, the heating fins 112 form flow channels 114 in the upper chamber and the lower chamber respectively, and the cross section of the flow channel is square; optionally, combined with Figure 1 and Figure 3 The fluid flow direction in the flow channel forms a plurality of tortuous shapes, thereby forming a maze-type flow channel structure;
[0040] according to Figure 3 As shown, the middle partition is provided with a channel 115 connecting the upper chamber and the lower chamber;
[0041] An upper plate 120, the upper plate 120 covers the top of the heating body 110,
[0042] The lower plate 130 covers the bottom of the heating body 110. Optionally, when a plurality of heating bodies 110 are stacked, the upper and lower plates respectively cover the top and bottom of the stacked heating bodies 110 to form a seal.
[0043] The electric heating structure proposed in this embodiment forms a labyrinth-type flow channel design by means of heating fins on the upper and lower sides of the middle partition, thereby forming a heating environment of the upper and lower layers with unidirectional flow, thereby improving the uniformity and efficiency of heat conduction.
[0044] In some embodiments, see Figure 2 and Figure 5 As shown, the electric heating structure also includes a fluid inlet 140 and a fluid outlet 150, wherein the fluid inlet 140 is arranged on the wall of the lower chamber 118 or the upper chamber 117 of one electric heating structure, and the fluid outlet is arranged on the same electric heating structure or a different electric heating structure, and is arranged on the wall on the same side or different side of another chamber opposite to the fluid inlet.
[0045] The positions of the fluid inlet and outlet can be designed according to actual needs such as the outlet position of the flow channel, and are not specifically limited.
[0046] In some embodiments, a plurality of welding grooves 121 / 131 are provided on the upper plate 120 and the lower plate 130, and the plurality of welding grooves 121 / 131 correspond to the positions of the heating fins 112, and are used to weld and fix the heating fins 112 and the upper plate 120 or the lower plate 130, thereby ensuring that the fluid flows through the flow channel between the heating fins and preventing the fluid from flowing through the gap between the upper and lower plates and the heating body.
[0047] In some embodiments, in combination Figure 3 As shown, a plurality of parallel heating fins 112 form a plurality of flow channels that allow the fluid to flow in the same direction and turn at the left and right side walls of the upper chamber 117 or the lower chamber 118 .
[0048] In some embodiments, in combination Figure 1 , Figure 3 and Figure 4 As shown, the plurality of parallel heating fins 112 are provided with a confluence port 113, and the confluence port 113 is used to redistribute the fluid in the plurality of flow channels in the same flow direction. The confluence port can balance the fluid pressure between the fins in each flow channel, so that the flow velocity and flow rate of the fluid between the heating fins tend to be the same or can be roughly the same, and finally achieve the purpose of balanced heating and high efficiency.
[0049] In some optional embodiments, in order to ensure that the flow rates of each flow channel are balanced, the depth of the confluence 113 accounts for 1 / 4 to 3 / 4 of the overall height of the heating fin 112, and the width of the confluence is several millimeters to several centimeters, which is designed based on the actual overall size.
[0050] In some embodiments, the number of the electric heating elements 160 is plural and they are disposed in the horizontal through holes 116 of the middle partition and are evenly distributed in the front-to-back or left-to-right directions of the middle partition.
[0051] Optionally, both sides of the electric heating element 160 are connected to a heating power source through wires, and the power of the electric heating is adjustable. The types of electric heating elements include, but are not limited to, heating tubes, silicon nitride heating rods, PTC heaters, etc. The uniform distribution of the electric heating elements is conducive to quickly, evenly, stably and controllably transferring heat to the heating fins on both sides, which can effectively improve the heating efficiency.
[0052] In some embodiments, a temperature sensor 170 is further included, which is arranged in parallel with the electric heating element 160 and can also be arranged in the through hole 116 of the middle partition 111.
[0053] In some optional embodiments, the number of the temperature sensors 170 is the same as the number of the electric heating elements 160, and the temperature sensors 170 and the electric heating elements 160 are arranged alternately. Providing multiple temperature sensors 170 can monitor the temperature of each area on the heating body 110 in real time, effectively preventing overheating.
[0054] In some embodiments, the electric heating structure is made of aluminum or steel, and the heating fins, chambers, holes and other structures in the heating body are formed by machining or casting.
[0055] According to another embodiment of the present invention, Figure 6-Figure 9 As shown, a dehydrogenation reaction device is disclosed, comprising:
[0056] At least two electric heating structures 100 are stacked to form a structure. Optionally, the electric heating structure in this embodiment can be any of the electric heating structures disclosed in the above embodiments. Of course, it can also be an electric heating structure of other structural forms.
[0057] A layer plate 200 ( Figure 8 ), the layer plate 200 is provided with a passage 210 for fluid to pass through, each of the electric heating structures 100 is provided with a heating fin 112 and an electric heating element 160, and a curved flow channel 114 is formed between the heating fins 112;
[0058] A fluid inlet 140 is provided on the top of the electric heating structure 100;
[0059] A fluid outlet 150 is provided on the electric heating structure 100 at the bottom;
[0060] An upper plate 120, covering the upper portion of the electric heating structure 100 at the top;
[0061] The lower plate 130 covers the lower portion of the electric heating structure 100 at the bottom.
[0062] The dehydrogenation reaction equipment provided in this embodiment improves the uniformity and heating efficiency of the dehydrogenation reaction and improves the quality of the hydrogen product by designing and adopting multiple stacked electric heating structures.
[0063] In some embodiments, see Figure 1-5 The electric heating structure shown in the figure, the electric heating structure 100 includes a heating body 110, the heating body 110 includes a middle partition 111, the electric heating element 160 is embedded in the middle partition 111, the upper and lower sides of the middle partition 111 respectively form an upper chamber 117 and a lower chamber 118, heating fins 112 are arranged in the upper chamber 117 and the lower chamber 118, the heating fins 112 transfer heat with the middle partition 111, the heating fins 112 respectively form flow channels 114 in the upper chamber 117 and the lower chamber 118, and the middle partition 111 is provided with a channel 115 connecting the upper chamber and the lower chamber.
[0064] In some embodiments, in combination Figure 6 As shown, a catalyst loading port and a plug 300 are respectively provided on the side walls of the upper and lower chambers of the electric heating structure 100. The catalyst is a solid granular catalyst, which is loaded into the upper and lower chambers through the loading port, and is sealed by the plug 300 after loading.
[0065] In some embodiments, see Figure 8 As shown, the channel 115 on the middle partition plate 111 and the passage 210 of the layer plate 200 are provided with a filter screen, and the filter screen is used to prevent the catalyst from passing through.
[0066] according to Fig. 9 The filter shown is in the shape of a racetrack, and limit plates can be provided on both sides to fix the filter in the channel or passage. The filter is used to prevent the catalyst in the chamber from flowing into the lower chamber to affect the efficiency and effect of the reaction. The material of the filter is preferably stainless steel, such as 304 stainless steel.
[0067] In some embodiments, the electric heating structures 100 are connected by welding or threading, preferably welding, to improve the sealing of the flow channel. The layer plates 200 are sealed between the electric heating structures to prevent the fluid from flowing outside the flow channel 114 .
[0068] In some embodiments, there are multiple electric heating elements 160 on each of the electric heating structures 100, and the number of electric heating elements 160 on the top electric heating structure is greater than the number of electric heating elements on the bottom electric heating structure. Optionally, the heating power of the electric heating element 160 can be adjusted as needed.
[0069] In this embodiment, more electric heating elements are arranged on the top electric heating structure, and fewer electric heating elements are arranged on the middle and bottom electric heaters, so as to meet the demand for more reaction heat energy of the top electric heater and improve the utilization rate of heat energy and the yield of the product.
[0070] In some embodiments, temperature sensors 170 are further included. The number of the temperature sensors 170 is the same as the number of the electric heating elements 160, and the temperature sensors 170 are alternately horizontally distributed on each of the electric heating structures, so as to have better control over the heating efficiency and uniformity of the electric heating structure.
[0071] In some embodiments, a plurality of parallel heating fins 112 are provided with a confluence port 113 , and the confluence port 113 is used to redistribute the fluid in the plurality of flow channels 114 to make the heating more uniform.
[0072] In some embodiments, welding grooves 121 / 131 are provided on the upper plate 120 and the lower plate 130 , and the welding grooves correspond to the heating fins 112 , thereby preventing the fluid from flowing through the electric heating structure without passing through a flow channel.
[0073] The electric heating structure 100 is made of aluminum or steel and is formed by machining or casting.
[0074] In some embodiments, a preheater is also included. The preheater does not contain a catalyst and only heats the fluid before the formal reaction. The preheater is connected to at least two stacked electric heating structures through a pipeline. Figure 1 In the electric heating structure shown in , the fluid inlet 140 is arranged in the lower chamber, and the fluid outlet 150 is arranged in the upper chamber, and the above-mentioned inlet and outlet are provided with joints. Through this structure, the thermal energy utilization rate of the electric heating element is improved. Of course, other heating structures can also be selected, and there is no specific limitation.
[0075] It should be noted that although the utility model is disclosed as above in the form of a preferred embodiment, it is not intended to limit the utility model. Any technical personnel in this field may make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, the scope of protection of the utility model shall be based on the scope defined by the claims of the utility model.
Claims
1. An electric heating structure for dehydrogenation reaction, characterized in that: include: A heating body, the heating body comprising a middle partition, an electric heating element is embedded in the middle partition, an upper chamber and a lower chamber are formed on upper and lower sides of the middle partition respectively, heating fins are arranged in the upper chamber and the lower chamber, the heating fins transfer heat with the middle partition, the heating fins form flow channels in the upper chamber and the lower chamber respectively, and a channel connecting the upper chamber and the lower chamber is arranged on the middle partition; an upper plate, the upper plate covering the top of the heating body, A lower plate is provided, wherein the lower plate covers the bottom of the heating body.
2. The electric heating structure for dehydrogenation reaction according to claim 1, characterized in that: It also includes a fluid inlet and / or a fluid outlet, wherein the fluid inlet is arranged on the wall of the lower chamber or the upper chamber, and the fluid outlet is arranged on the upper chamber or on the wall on the same side or different sides of the upper chamber.
3. The electric heating structure for dehydrogenation reaction according to claim 1, characterized in that: The upper plate and the lower plate are provided with a plurality of welding grooves, which correspond to the positions of the heating fins and are used for welding and fixing the heating fins and the upper plate or the lower plate.
4. The electric heating structure for dehydrogenation reaction according to claim 1, characterized in that: A plurality of parallel heating fins form a plurality of flow channels for the fluid to flow in the same direction and turn at the side wall of the upper chamber or the lower chamber.
5. The electric heating structure for dehydrogenation reaction according to claim 4, characterized in that: The plurality of parallel heating fins are provided with confluence ports, and the confluence ports are used to redistribute the fluid in the plurality of flow channels.
6. The electric heating structure for dehydrogenation reaction according to claim 5, characterized in that: The depth of the confluence port accounts for 1 / 4 to 3 / 4 of the overall height of the heating fin.
7. The electric heating structure for dehydrogenation reaction according to claim 1, characterized in that: There are multiple electric heating elements, which are arranged in the horizontal through holes of the middle partition and are evenly distributed in the front and back or left and right directions of the middle partition.
8. The electric heating structure for dehydrogenation reaction according to claim 1, characterized in that: It also includes a temperature sensor, which is arranged in parallel with the electric heating element.
9. The electric heating structure for dehydrogenation reaction according to claim 8, characterized in that: The number of the temperature sensors is the same as the number of the electric heating elements, and the temperature sensors and the electric heating elements are arranged alternately.
10. The electric heating structure for dehydrogenation reaction according to any one of claims 1 to 9, characterized in that: The heating body, the upper plate and the lower plate are made of aluminum or steel, and the heating body is formed by machining or casting.