A thermo-chemical reactor with porous fins

Abstract

The utility model provides a kind of thermal chemical reactor with porous fin, comprising: main body, the inside of main body is formed with cavity;Inner tube, inner tube is arranged in cavity, the inside of inner tube is formed with flow channel;Porous fin, porous fin is arranged in turn around inner tube, and multiple first through holes are provided on porous fin;Porous fence, multiple reaction chambers are formed between the inside of porous fence, inner tube and multiple porous fins, and annular outer cavity is formed between the outside of porous fence and the inner wall of cavity.Relative to prior art, in the thermal chemical reactor with porous fin of the utility model, heat transfer medium has strong flowability;The design of longitudinal flow blocking part and transverse flow blocking piece of porous fin can increase the flow resistance of heat transfer medium in inner tube, which is beneficial to prolong the flow time of heat transfer medium in inner tube;Porous fin and multiple radial partition plates can reduce the thickness of heat storage material in the axial and radial directions of flow channel, which is beneficial to the smooth passage of heat transfer medium.

Description

Technical Field

[0001] This utility model relates to the field of thermal storage technology, specifically to a thermochemical reactor with porous fins. Background Technology

[0002] Thermochemical energy storage reactors utilize the thermal effect of chemical reactions to store and release thermal energy. When there is excess heat in industry, a thermochemical energy storage reactor can be used to store the excess heat. When thermal energy is needed, the stored heat in the thermochemical energy storage reactor can be released, thereby saving costs and improving environmental protection.

[0003] Please see Figure 1 The thermochemical energy storage reactor is a fixed-bed structure. The main body of the reactor is a heat storage material (such as calcium hydroxide), which is stored inside the reactor in a free-stacking manner. Gas distribution spaces are provided above and below the heat storage material. The high-temperature drying medium obtains heat from waste heat generated during factory production or solar energy. During the heat storage process, the high-temperature drying medium enters the reactor from the bottom and then passes through the main body of the heat storage material. The heat storage material is heated and dehydrated (Ca(OH)2→CaO+H2O, ΔH=104.4 kJ / mol), thereby absorbing the heat energy of the high-temperature drying medium. The temperature of the high-temperature drying medium decreases, and it mixes with the water vapor released from the heat storage material to become a low-temperature humid medium. The low-temperature humid medium flows out of the reactor from the top. During the heat release process, the low-temperature moist medium enters the reactor from the bottom. After being dehydrated, the heat storage material combines with water to release heat (CaO+H2O→Ca(OH)2, ΔH=-104.4 kJ / mol), which in turn heats the low-temperature moist medium. The heated low-temperature moist medium becomes a high-temperature dry medium and is discharged from the top of the reactor. The heat energy it carries can be used in other processes.

[0004] In traditional thermochemical energy storage reactors, the heat storage material is simply piled up, which leads to poor flow of the heat transfer medium in the reactor. Especially during the heat release process, the heat generated by the reaction cannot be smoothly transferred to other parts of the reactor, resulting in local overheating of the heat storage material near the reactor inlet. This can easily lead to sintering or agglomeration, further deteriorating the heat transfer effect. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the prior art and provide a thermochemical reactor with porous fins.

[0006] One embodiment of this utility model provides a thermochemical reactor with porous fins, comprising: The main body has a cavity inside, and a plurality of first air inlets and a plurality of air outlets are respectively provided at both ends of the cavity; An inner tube is disposed within the cavity, and a flow channel is formed inside the inner tube, which extends from the first air inlet to the air outlet. A porous fin, wherein multiple porous fins are arranged sequentially around the inner tube, and multiple first through holes are provided on the porous fins; A porous enclosure is provided, which surrounds a plurality of porous fins. A plurality of reaction chambers for containing heat storage material are formed between the inner side of the porous enclosure, the inner tube, and the plurality of porous fins. The plurality of reaction chambers are arranged sequentially around the inner tube. Adjacent reaction chambers are connected through the first through hole. The two ends of the reaction chamber are respectively connected to the first air inlet and the air outlet. An annular outer cavity is formed between the outer side of the porous enclosure and the inner wall of the cavity. The porous enclosure is provided with a plurality of second through holes, and the annular outer cavity is connected to the reaction chamber through the second through holes.

[0007] In some alternative embodiments, the porous fins have a longitudinal flow-blocking portion that passes through the inner tube and extends into the flow channel, the longitudinal flow-blocking portion extending axially along the flow channel.

[0008] In some optional embodiments, the flow channel is further provided with a plurality of transverse baffles, which are arranged sequentially along the axial direction of the flow channel and extend radially along the flow channel.

[0009] In some optional embodiments, the plurality of transverse flow deflectors are divided into multiple groups, each group including multiple transverse flow deflectors, and the multiple groups of transverse flow deflectors are correspondingly arranged between adjacent longitudinal flow deflectors, and the multiple transverse flow deflectors in the same group are arranged sequentially along the axial direction of the flow channel.

[0010] In some alternative embodiments, the thermochemical reactor with porous fins further includes a plurality of radial partitions disposed between the inner tube and the porous enclosure and arranged around the inner tube, the plurality of radial partitions being arranged sequentially along the extension direction of the flow channel; The radial partition plates divide each reaction chamber into multiple sub-chambers, which are arranged sequentially along the extension direction of the flow channel. The radial partition plates are provided with multiple vent holes, and adjacent sub-chambers of the same reaction chamber are connected through several of the vent holes.

[0011] In some alternative embodiments, a plurality of the vent holes are arranged sequentially around the inner tube, and adjacent sub-chambers of the same reaction chamber are connected through the plurality of vent holes.

[0012] In some optional embodiments, a plurality of first air inlets and a plurality of air outlets are respectively provided at both ends of the cavity; Multiple first air inlets are arranged sequentially around the flow channel; Multiple air outlets are arranged sequentially around the flow channel.

[0013] In some optional embodiments, the main body is further provided with a pressure equalization chamber, one end of which is provided with a second air inlet, and the other end of which is connected to the flow channel and a plurality of first air inlets.

[0014] In some alternative embodiments, the inner diameter of the equalizing chamber gradually increases in the direction from the second air inlet to the flow channel.

[0015] Compared to existing technologies, in the thermochemical reactor with porous fins of this invention, the heat brought by the heat transfer medium can be transferred through the porous fins, thereby enhancing the radial heat transfer uniformity within the cavity. Moreover, the heat transfer medium can also flow freely to other areas through the porous fins, which is beneficial to improving the uniformity of heat and mass transfer. The design of the longitudinal and transverse flow-blocking parts of the porous fins can increase the flow resistance of the heat transfer medium in the inner tube, which is beneficial to prolonging the flow time of the heat transfer medium in the inner tube and enhancing the heat transfer effect. The porous fins and multiple radial partition plates can reduce the thickness of the heat storage material in the axial and radial directions of the flow channel, which is equivalent to dividing the heat storage material into several "thin layers", which is beneficial to the smooth passage of the heat transfer medium.

[0016] To provide a clearer understanding of this invention, the specific embodiments of this invention will be described below in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a thermochemical energy storage reactor in the background technology, showing the heat storage and heat release processes. Figure 2 This is a cross-sectional view of a thermochemical reactor with porous fins according to an embodiment of the present invention. Figure 3 This is an exploded view of a thermochemical reactor with porous fins according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a thermochemical reactor with porous fins according to an embodiment of the present invention, with the hidden portion of the structure shown. Figure 5This is a schematic diagram of one side of the thermochemical reactor with porous fins according to an embodiment of the present invention, when the hidden part of the structure is shown. Figure 6 This is a schematic diagram of one side of a thermochemical reactor with porous fins according to another embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 10. Main body; 11. First air inlet; 12. Air outlet; 13. Pressure equalization chamber; 14. Second air inlet; 20. Inner tube; 21. Flow channel; 22. Lateral flow baffle; 30. Perforated fins; 31. First through hole; 32. Longitudinal flow baffle; 40. Perforated enclosure; 41. Reaction chamber; 411. Sub-chamber; 42. Annular outer cavity; 43. Second through hole; 50. Radial partition plate; 51. Vent hole; Detailed Implementation The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. In the description of the present utility model, unless otherwise stated, "a plurality of" means two or more, and "a number" means one or more. In addition, unless otherwise stated, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In the description of this utility model, references to terms such as "one embodiment," "some alternative implementations," or "some optional embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0022] Please see Figures 2 to 5 This invention provides a thermochemical reactor with porous fins 30, comprising: The main body 10 has a cavity inside, and a plurality of first air inlets 11 and a plurality of air outlets 12 are respectively provided at both ends of the cavity. The inner tube 20 is disposed in the cavity. A flow channel 21 is formed inside the inner tube 20. The flow channel 21 extends from the first air inlet 11 to the air outlet 12. The heat transfer medium can pass through the flow channel 21, and the heat of the heat transfer medium can be transferred to the outside of the inner tube 20 through the inner tube 20. A porous fin 30, multiple porous fins 30 are arranged sequentially around the inner tube 20, and multiple first through holes 31 are provided on the porous fins 30; A porous baffle plate 40 is arranged around multiple porous fins 30. Multiple reaction chambers 41 for containing heat storage material are formed between the inner side of the porous baffle plate 40, the inner tube 20, and the multiple porous fins 30. The multiple reaction chambers 41 are arranged sequentially around the inner tube 20. Adjacent reaction chambers 41 are connected through a first through hole 31. The two ends of the reaction chamber 41 are connected to a first air inlet 11 and an air outlet 12, respectively. The heat transfer medium enters the reaction chamber 41 from the first air inlet 11 and can then flow out from the air outlet 12. In addition, the heat transfer medium can be connected between adjacent reaction chambers 41 through the first through hole 31 to make the reaction more complete.

[0023] An annular outer cavity 42 is formed between the outer side of the porous baffle 40 and the inner wall of the cavity. Multiple second through holes 43 are provided on the porous baffle 40. The annular outer cavity 42 is connected to the reaction chamber 41 through the second through holes 43.

[0024] The heat storage material can be designed according to actual needs. In this embodiment, the heat storage material can be calcium hydroxide.

[0025] The working principle of a thermochemical reactor with porous fins 30 according to an embodiment of the present invention is described below: In the heat storage process of the thermochemical reactor with porous fins 30, the dry, high-temperature heat transfer medium enters the main body 10 and is divided into three parts. The first part of the heat transfer medium enters from one end of the flow channel 21 and flows out from the other end. The heat of the heat transfer medium is transferred to the porous fins 30 through the inner tube 20, and then the heat is transferred to the sides of each reaction chamber 41 through the thermal conductivity of the porous fins 30, thereby improving the radial heat transfer effect and the radial heat conduction uniformity of the reaction chamber 41. The second part of the heat transfer medium enters the reaction chamber 41 from the first air inlet 11 and then undergoes a dehydration reaction with the heat storage material. The heat transfer medium in adjacent reaction chambers 41 can flow between each other. To improve the radial flow of the heat transfer medium in the reaction chamber 41, the system avoids situations such as high local pressure, large temperature difference in the overall reactor, and low heat storage efficiency near the first air inlet 11. The third part of the heat transfer medium will enter the annular outer cavity 42 and can enter various positions in the axial direction of the reaction chamber 41 through the second through hole 43, improving the axial flow of the heat transfer medium in the reaction chamber 41. Moreover, the heat of the third part of the heat transfer medium can also be conducted to the porous surrounding plate 40, and the heat of the porous surrounding plate 40 can be conducted to the axial side of the reaction chamber 41, improving the heat uniformity in the axial direction of the reaction chamber 41. Finally, the third part of the heat transfer medium can enter the reaction chamber 41 through the second through hole 43 and then flow out from the air outlet 12. After the reaction, the second and third parts of the heat transfer medium will change from dry and high temperature to low temperature and humid.

[0026] In the heat release process of the thermochemical reactor with porous fins 30, the low-temperature, humid heat transfer medium enters the main body 10 and is divided into three parts. The first part of the heat transfer medium enters from one end of the flow channel 21 and flows out from the other end. The heat generated by the reaction in the reaction chamber 41 is transferred to the heat transfer medium in the flow channel 21 through the inner tube 20, allowing the heat transfer medium to quickly absorb heat and leave, avoiding heat accumulation and quickly removing heat. The second part of the heat transfer medium enters the reaction chamber 41 from the first air inlet 11 and then undergoes a hydration reaction with the heat storage material, thereby releasing heat. The heat transfer media in adjacent reaction chambers 41 can flow to each other, thereby improving the radial flow of the heat transfer medium in the reaction chamber 41. The heat transfer medium can be transferred to the porous fins 30, then to the inner tube 20, and then quickly carried away by the first part of the heat transfer medium, increasing the radial heat transfer rate and improving the temperature uniformity of the reaction chamber 41. The third part of the heat transfer medium will enter the annular outer cavity 42 and can enter various positions in the axial direction of the reaction chamber 41 through the second through hole 43, improving the flowability of the heat transfer medium in the axial direction of the reaction chamber 41, so that the heat transfer medium can react in various positions in the reaction chamber 41, avoiding only local reaction. The heat generated by the reaction can be conducted to the axial side of the reaction chamber 41, improving the axial heat uniformity of the reaction chamber 41, and thus improving the temperature uniformity of the reaction chamber 41. Finally, the third part of the heat transfer medium can enter the reaction chamber 41 through the second through hole 43 and then flow out from the outlet 12. After the reaction, the second and third parts of the heat transfer medium will change from low temperature and moisture to dry and high temperature.

[0027] In some alternative embodiments, the porous fins 30 have a longitudinal baffle 32 that passes through the inner tube 20 and extends into the flow channel 21. The longitudinal baffle 32 extends axially along the flow channel 21 and can provide a certain resistance, thereby allowing the heat transfer medium to stay in the flow channel 21 for a longer time, prolonging the time for heat transfer between the heat transfer medium and the inner tube 20. Moreover, the heat transfer medium can also transfer heat to the reaction chamber 41 through the longitudinal baffle 32, or transfer heat from the reaction chamber 41 to the heat transfer medium through the longitudinal baffle 32.

[0028] In some optional embodiments, a plurality of transverse baffles 22 are also provided within the flow channel 21. The plurality of transverse baffles 22 are arranged sequentially along the axial direction of the flow channel 21 and extend radially along the flow channel 21. The transverse baffles 22 can increase the resistance and further enhance the flow obstruction effect on the heat transfer medium, so that the heat transfer medium can exchange heat more with the transverse baffles 22, the inner tube 20 and the longitudinal baffle 32.

[0029] To improve the flow resistance, in some optional embodiments, the multiple transverse baffles 22 are divided into multiple groups, each group including multiple transverse baffles 22. These groups of transverse baffles 22 are correspondingly arranged between adjacent longitudinal baffles 32, and the multiple transverse baffles 22 in the same group are arranged sequentially along the axial direction of the flow channel 21. The arrangement of the transverse baffles 22 between adjacent longitudinal baffles 32 can effectively increase the resistance. Of course, the number and arrangement of the transverse baffles 22 can be designed according to requirements.

[0030] In some alternative embodiments, the thermochemical reactor with porous fins 30 further includes a plurality of radial partition plates 50 disposed between the inner tube 20 and the porous surrounding plate 40 and arranged around the inner tube 20, with the plurality of radial partition plates 50 arranged sequentially along the extension direction of the flow channel 21. Multiple radial partition plates 50 divide each reaction chamber 41 into multiple sub-chambers 411, which are arranged sequentially along the extension direction of the flow channel 21. Multiple vent holes 51 are provided on the radial partition plates 50, and adjacent sub-chambers 411 of the same reaction chamber 41 are connected through several vent holes 51. The multiple radial partition plates 50 divide the reaction chamber 41 into multiple sub-chambers 411, and each sub-chamber 411 is thinner in the axial direction of the flow channel 21, which facilitates the passage of the heat transfer medium and allows the heat storage material in each sub-chamber 411 to react fully with the heat transfer medium. Adjacent sub-chambers 411 of the same reaction chamber 41 are connected through several vent holes 51, while the sub-chambers 411 of adjacent reaction chambers 41 are connected through a first through hole 31. Therefore, the flow of the heat transfer medium between the various sub-chambers 411 is strong.

[0031] By increasing the number of perforated fins and radial partition plates 50, the width and thickness of the sub-chamber 411 can be reduced, thereby enhancing the flow of the heat transfer medium. The number of perforated fins and radial partition plates 50 can be designed according to actual needs, and is not limited to those shown in the figure.

[0032] In some alternative embodiments, multiple vent holes 51 are arranged sequentially around the inner tube 20, and adjacent sub-chambers 411 of the same reaction chamber 41 are connected through multiple vent holes 51, thereby further improving the flow of heat transfer medium between sub-chambers 411.

[0033] In some optional embodiments, multiple first air inlets 11 and multiple air outlets 12 are respectively provided at both ends of the cavity; the multiple first air inlets 11 are arranged in sequence around the flow channel 21; the multiple air outlets 12 are arranged in sequence around the flow channel 21, so that the heat transfer medium can enter each reaction chamber 41 evenly and improve the pressure uniformity inside the cavity.

[0034] Since the positions of the multiple first air inlets 11 are arranged over a wide range, in order to avoid uneven air pressure among the multiple first air inlets 11, in some optional embodiments, a pressure equalization chamber 13 is also provided in the main body 10. One end of the pressure equalization chamber 13 is provided with a second air inlet 14, and the other end of the pressure equalization chamber 13 is connected to the flow channel 21 and the multiple first air inlets 11. After the heat transfer medium enters the pressure equalization chamber 13 from the second air inlet 14, the pressure equalization chamber 13 can make the air pressure of the heat transfer medium enter each first air inlet 11 more evenly, thereby improving the uniformity of the pressure entering each first air inlet 11.

[0035] In some alternative embodiments, the inner diameter of the equalizing chamber 13 gradually increases in the direction from the second air inlet 14 to the flow channel 21, thereby guiding the heat transfer medium to flow to each of the first air inlets 11.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thermochemical reactor with porous fins, characterized in that, include: The main body has a cavity inside, and a plurality of first air inlets and a plurality of air outlets are respectively provided at both ends of the cavity; An inner tube is disposed within the cavity, and a flow channel is formed inside the inner tube, which extends from the first air inlet to the air outlet. A porous fin, wherein multiple porous fins are arranged sequentially around the inner tube, and multiple first through holes are provided on the porous fins; A porous enclosure is provided, which surrounds a plurality of porous fins. A plurality of reaction chambers for containing heat storage material are formed between the inner side of the porous enclosure, the inner tube, and the plurality of porous fins. The plurality of reaction chambers are arranged sequentially around the inner tube. Adjacent reaction chambers are connected through the first through hole. The two ends of the reaction chamber are respectively connected to the first air inlet and the air outlet. An annular outer cavity is formed between the outer side of the porous enclosure and the inner wall of the cavity. The porous enclosure is provided with a plurality of second through holes, and the annular outer cavity is connected to the reaction chamber through the second through holes.

2. A thermochemical reactor with porous fins according to claim 1, characterized in that: The porous fin has a longitudinal flow-blocking portion that passes through the inner tube and extends into the flow channel, and the longitudinal flow-blocking portion extends axially along the flow channel.

3. A thermochemical reactor with porous fins according to claim 1, characterized in that: The flow channel is also provided with a plurality of transverse flow deflectors, which are arranged sequentially along the axial direction of the flow channel and extend radially along the flow channel.

4. A thermochemical reactor with porous fins according to claim 3, characterized in that: The porous fin has a longitudinal flow-blocking portion that passes through the inner tube and extends into the flow channel, and the longitudinal flow-blocking portion extends along the axial direction of the flow channel; The multiple transverse flow deflectors are divided into multiple groups, each group including multiple transverse flow deflectors. The multiple groups of transverse flow deflectors are correspondingly arranged between adjacent longitudinal flow deflectors, and the multiple transverse flow deflectors in the same group are arranged sequentially along the axial direction of the flow channel.

5. A thermochemical reactor with porous fins according to any one of claims 1 to 4, characterized in that, It also includes a plurality of radial partition plates, which are disposed between the inner tube and the porous surrounding plate and arranged around the inner tube, and the plurality of radial partition plates are arranged sequentially along the extension direction of the flow channel; The radial partition plates divide each reaction chamber into multiple sub-chambers, which are arranged sequentially along the extension direction of the flow channel. The radial partition plates are provided with multiple vent holes, and adjacent sub-chambers of the same reaction chamber are connected through several of the vent holes.

6. A thermochemical reactor with porous fins according to claim 5, characterized in that: Multiple vent holes are arranged sequentially around the inner tube, and adjacent sub-chambers of the same reaction chamber are connected through multiple vent holes.

7. A thermochemical reactor with porous fins according to any one of claims 1 to 4, characterized in that: The cavity is provided with a plurality of first air inlets and a plurality of air outlets at its two ends; Multiple first air inlets are arranged sequentially around the flow channel; Multiple air outlets are arranged sequentially around the flow channel.

8. A thermochemical reactor with porous fins according to any one of claims 1 to 4, characterized in that: The main body is also provided with a pressure equalization chamber, one end of which is provided with a second air inlet, and the other end of which is connected to the flow channel and the plurality of first air inlets.

9. A thermochemical reactor with porous fins according to claim 8, characterized in that: The inner diameter of the equalizing chamber gradually increases from the second air inlet to the flow channel.

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