A dehydrogenation reaction device

Abstract

The utility model discloses a dehydrogenation reaction device, which includes: at least two electric heating structures are stacked, a layer plate is arranged between each of the electric heating structures, a passage for fluid to pass through is arranged on the layer plate, a heating fin and an electric heating element are arranged in each of the electric heating structures, and a curved flow channel is formed between the heating fins; a fluid inlet is arranged on the electric heating structure at the top; a fluid outlet is arranged on the electric heating structure at the bottom; an upper plate covers the upper part of the electric heating structure at the top; and a lower plate covers the lower part of the electric heating structure at the bottom. The utility model improves the uniformity and heating efficiency of the dehydrogenation reaction and improves the quality of the product by designing and using a plurality of stacked electric heating structures.

Description

Technical Field

[0001] The utility model relates to the technical field of reactor equipment, in particular to a dehydrogenation reaction equipment. 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] The dehydrogenation of organic liquids is a highly endothermic reaction, which requires additional heat to carry out the hydrogen production reaction process. However, the existing electric heating reaction equipment has low thermal energy utilization, uneven and unstable reactions, and cannot accurately control the reaction temperature of each area in the reaction equipment, resulting in problems such as unsatisfactory reactant conversion rates. Utility Model Content

[0004] The embodiment of the utility model provides a dehydrogenation reaction device to solve the problems of low thermal energy utilization rate, uneven reaction, unstable reaction, etc. existing in the existing reaction equipment.

[0005] The dehydrogenation reaction equipment provided according to the embodiment of the utility model includes:

[0006] At least two electric heating structures are stacked, a layer plate is arranged between each of the electric heating structures, a passage for fluid to pass through is arranged on the layer plate, a heating fin and an electric heating element are arranged in each of the electric heating structures, and a curved flow channel is formed between the heating fins;

[0007] A fluid inlet, arranged on the electric heating structure at the top;

[0008] A fluid outlet is provided on the electric heating structure at the bottom;

[0009] An upper plate, covering the upper portion of the electric heating structure on the top;

[0010] A lower plate covers the lower portion of the electric heating structure at the bottom.

[0011] In some embodiments, the electric heating structure includes a heating body, the heating body includes a middle partition, the electric heating element is embedded in the middle partition, the upper and lower sides of the middle partition respectively form an upper chamber and a lower chamber, 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 the 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.

[0012] In some embodiments, a catalyst loading port and a plug are respectively provided on the side walls of the upper and lower chambers of the electric heating structure.

[0013] In some embodiments, a filter is disposed on the channel and the passage, and the filter is used to prevent the catalyst from passing through.

[0014] In some embodiments, the electric heating structures are connected by welding or threading.

[0015] In some embodiments, there are multiple electric heating elements on each of the electric heating structures, and the number of electric heating elements on the top electric heating structure is greater than the number of electric heating elements on the bottom electric heating structure.

[0016] In some embodiments, temperature sensors are further included. The number of the temperature sensors is the same as the number of the electric heating elements, and the temperature sensors are alternately and horizontally distributed on each of the electric heating structures.

[0017] In some embodiments, a 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.

[0018] In some embodiments, welding grooves are provided on the upper plate and the lower plate, and the welding grooves correspond to the heating fins; and / or,

[0019] The electric heating structure is made of aluminum or steel and is formed by machining or casting.

[0020] In some embodiments, a pre-heater is further included, wherein the pre-heater is connected to the at least two stacked electric heating structures through a pipeline.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The dehydrogenation reaction equipment proposed in the embodiment of the utility model improves the uniformity and heating efficiency of the dehydrogenation reaction and improves the quality of the product by designing and adopting a plurality of stacked electric heating structures.

[0023] Moreover, in a further embodiment, by arranging more electric heating elements on the top electric heating structure and fewer electric heating elements on the middle and bottom electric heating structures, the actual needs of the reaction equipment requiring more reaction heat energy at the front end and less heat energy at the rear end are met, thereby improving the utilization rate of thermal energy; temperature sensors and electric heating elements are arranged alternately and at close distances, and the overall temperature distribution of the electric heating elements and the reaction equipment is monitored in real time, so that the reaction temperature of each area can be accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a structural schematic diagram of an electric heating structure for dehydrogenation reaction provided by an embodiment of the utility model;

[0025] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle A area;

[0026] Figure 3 It is a top view of a heating body provided by an embodiment of the utility model;

[0027] Figure 4 yes Figure 3 Structural schematic diagram of the middle BB section;

[0028] Figure 5 It is a left view of an electric heating structure for dehydrogenation reaction provided by one embodiment of the utility model;

[0029] Figure 6 This is a front view of a dehydrogenation reaction device provided by an embodiment of the utility model;

[0030] Figure 7 It is a three-dimensional schematic diagram of a dehydrogenation reaction device provided by an embodiment of the utility model;

[0031] 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;

[0032] Fig. 9 It is a structural schematic diagram of a filter screen provided in one embodiment of the utility model.

[0033] Notes on the attached drawings:

[0034] 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

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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:

[0040] 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 and the middle partition 111 are heat-transferring, the heating fins 112 form flow channels 114 in the upper chamber and the lower chamber respectively, the cross section of the flow channel is square, 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;

[0041] according to Figure 3 As shown, the middle partition is provided with a channel 115 connecting the upper chamber and the lower chamber;

[0042] An upper plate 120, the upper plate 120 covers the top of the heating body 110,

[0043] 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 cover the top and bottom of the stacked heating bodies 110, respectively.

[0044] The electric heating structure proposed in this embodiment forms a labyrinth-shaped flow channel design by means of heating fins on the upper and lower sides of the middle partition, thereby forming a one-way flow heating environment and improving the uniformity and efficiency of heat conduction.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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 .

[0049] 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.

[0050] 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.

[0051] In some embodiments, the electric heating element 160 is multiple and is arranged in the horizontal through hole 116 of the middle partition, and is evenly distributed in the front and back or left and right directions of the middle partition. Optionally, both sides of the electric heating element 160 are connected to the heating power supply through wires, and the power of its electric heating is adjustable. The types of electric heating elements include but are not limited to heating tubes, silicon nitride heating rods, PTC and other heaters. The uniform distribution of electric heating elements is conducive to the rapid, balanced, stable and controllable transfer of 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 a heating structure with 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 middle partition 111 is embedded with the electric heating element 160, the upper and lower sides of the middle partition 111 respectively form an upper chamber 117 and a lower chamber 118, the upper chamber 117 and the lower chamber 118 are provided with heating fins 112, the heating fins 112 and the middle partition 111 are heat-transferring, the heating fins 112 are respectively formed in the upper chamber 117 and the lower chamber 118. The flow channel 114 is a square structure as a whole for fluid to pass through, and the combined 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;

[0064] Combination Figure 3 As shown, a channel 115 connecting the upper chamber and the lower chamber is provided on the middle partition 111.

[0065] 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 the plug 300 is used for plugging after loading.

[0066] 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.

[0067] according to Fig. 9The 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.

[0068] 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 .

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] The electric heating structure 100 is made of aluminum or steel and is formed by machining or casting.

[0075] 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 1In 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.

[0076] 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. A dehydrogenation reaction device, characterized in that: include: At least two electric heating structures are stacked, a layer plate is arranged between each of the electric heating structures, a passage for fluid to pass through is arranged on the layer plate, a heating fin and an electric heating element are arranged in each of the electric heating structures, and a curved flow channel is formed between the heating fins; A fluid inlet, arranged on the electric heating structure at the top; A fluid outlet is provided on the electric heating structure at the bottom; An upper plate, covering the upper portion of the electric heating structure on the top; A lower plate covers the lower portion of the electric heating structure at the bottom.

2. The dehydrogenation reaction equipment according to claim 1, characterized in that: The electric heating structure includes a heating body, which includes a middle partition, in which the electric heating element is embedded, and an upper chamber and a lower chamber are formed on the upper and lower sides of the middle partition respectively, and heating fins are arranged in the upper chamber and the lower chamber, and the heating fins transfer heat with the middle partition, and the heating fins form the 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.

3. The dehydrogenation reaction equipment according to claim 2, characterized in that: The side walls of the upper and lower chambers of the electric heating structure are respectively provided with a catalyst filling port and a plug.

4. The dehydrogenation reaction equipment according to claim 3, characterized in that: The channel and the passage are provided with filter screens, and the filter screens are used to prevent the catalyst from passing through.

5. The dehydrogenation reaction equipment according to any one of claims 1 to 4, characterized in that: The electric heating structures are connected by welding or threading.

6. The dehydrogenation reaction equipment according to any one of claims 1 to 4, characterized in that: There are multiple electric heating elements on each of the electric heating structures, and the number of electric heating elements on the top electric heating structure is greater than the number of electric heating elements on the bottom electric heating structure.

7. The dehydrogenation reaction equipment according to claim 6, characterized in that: It also includes temperature sensors, the number of which is the same as the number of the electric heating elements, and the temperature sensors are alternately and horizontally distributed on each of the electric heating structures.

8. The dehydrogenation reaction equipment according to any one of claims 1 to 4, characterized in that: A 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.

9. The dehydrogenation reaction equipment according to any one of claims 1 to 4, characterized in that: The upper plate and the lower plate are provided with welding grooves, and the welding grooves correspond to the heating fins; and / or, The electric heating structure is made of aluminum or steel and is formed by machining or casting.

10. The dehydrogenation reaction equipment according to any one of claims 1 to 4, characterized in that: The system also includes a pre-heater, which is connected to the at least two stacked electric heating structures through a pipeline.

Images