Silicon carbide heat exchanger
By setting a drain port in the silicon carbide heat exchanger to discharge residual cooling medium and nitrated liquid, the problem of incomplete discharge of cooling medium and materials is solved, heat exchange efficiency is improved and the stability and reliability of the equipment are ensured.
Patent Information
- Application Number
- CN202422902802.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-27
AI Technical Summary
In existing silicon carbide heat exchangers, the cooling medium and materials cannot be completely discharged during operation, resulting in reduced heat exchange efficiency and easy equipment corrosion and wear.
A first drain outlet is provided on the shell of the silicon carbide heat exchanger, and a second drain outlet is provided at the bottom of the discharge tank. These outlets are used to discharge residual cooling medium and nitrated liquid respectively, preventing the formation of an insulation layer and avoiding corrosion and wear.
It improves heat exchange efficiency, ensures the stability and reliability of the equipment, and prevents equipment corrosion and wear.
Smart Images
Figure CN223564801U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat exchanger technical field, especially a kind of silicon carbide heat exchanger. BACKGROUND
[0002] Silicon carbide heat exchanger is a new type of heat exchanger using silicon carbide ceramic material as heat transfer medium. Due to the excellent properties of silicon carbide ceramic, such as corrosion resistance, high temperature resistance, high thermal conductivity, high hardness and wear resistance, silicon carbide ceramic heat exchanger is suitable for high temperature and corrosion resistant environment.
[0003] During the operation of the silicon carbide heat exchanger, the cooling medium and the material cannot be completely discharged, and the residual cooling medium and material may adhere to the inner wall or pipeline of the silicon carbide heat exchanger, forming a layer of thermal insulation layer, which blocks the heat transfer and reduces the heat exchange efficiency. At the same time, the residual material may react with the silicon carbide and rub against the shell, causing corrosion and wear of the equipment. SUMMARY
[0004] In view of the above problems, the present application provides a silicon carbide heat exchanger to solve the technical problems of the existing silicon carbide heat exchanger, which cannot completely discharge the cooling medium and material during operation, resulting in reduced heat exchange efficiency and easy corrosion and wear of the equipment.
[0005] To achieve the above purpose, in a first aspect, the present application provides a silicon carbide heat exchanger, comprising a shell, a feed tank, a discharge tank and a heat exchange module, the shell is provided with a medium inlet, a medium outlet and a first discharge port, the medium inlet is used for connecting the cooling medium, the medium outlet is used for outputting the cooling medium, and the first discharge port is used for discharging the cooling medium completely; the feed tank is distributed at one end of the shell, the feed tank is provided with a material inlet, the discharge tank is distributed at the other end of the shell, the top of the discharge tank is provided with a material outlet, and the bottom of the discharge tank is provided with a second discharge port for discharging the material completely; the heat exchange module comprises two tube sheets, silicon carbide heat exchange tubes and baffles, the silicon carbide heat exchange tubes are located inside the shell and extend outward to the outside of the shell, the two tube sheets are distributed at both ends of the silicon carbide heat exchange tubes, and the baffles are distributed on the silicon carbide heat exchange tubes.
[0006] As an embodiment of the utility model, the shell is further provided with a flange at both ends, and the flange is used to connect the tube sheet and the shell.
[0007] As an embodiment of the utility model, the tube sheet is provided with a first tube hole, the flange is provided with a second tube hole, the first tube hole corresponds to the second tube hole one by one, and the silicon carbide heat exchange tube is connected with the first tube hole and the second tube hole.
[0008] As an embodiment of the utility model, the baffle is provided with a baffle hole, and the silicon carbide heat exchange pipe penetrates through the baffle hole.
[0009] As an embodiment of the utility model, the shell further comprises a feeding pipe, the feeding pipe is installed on the medium inlet, and the feeding pipe is provided with a first check valve and an adjusting valve.
[0010] As an embodiment of the utility model, the shell further comprises a discharging pipe, the discharging pipe is installed on the medium outlet, and the discharging pipe is provided with a second check valve, a flow meter and a pH meter.
[0011] As an embodiment of the utility model, the material inlet is provided with a third check valve, and the material outlet is provided with a fourth check valve and a thermometer.
[0012] As an embodiment of the utility model, the shell further comprises two saddles, and the two saddles are symmetrically arranged at the bottom of the shell.
[0013] As an embodiment of the utility model, the left surface of the feeding tank is provided with a first flange cover, and the right surface of the discharging tank is provided with a second flange cover.
[0014] Different from the prior art, the technical scheme of the application is characterized in that a first exhaust port is arranged on the shell, and a second exhaust port is arranged at the bottom of the discharging tank, so that after the cooling medium and the nitration liquid are heat exchanged, the first exhaust port can exhaust the residual cooling medium, the second exhaust port can exhaust the residual nitration liquid, the residual cooling medium and the residual nitration liquid can be prevented from forming a heat insulation layer, the heat exchange efficiency can be reduced, the residual material can be prevented from corroding or wearing the equipment, and the stability and reliability of the equipment operation can be ensured.
[0015] The above-mentioned utility model content related record is only the summary of the technical scheme of the application, in order to let the ordinary skilled person in the art can more clearly understand the technical scheme of the application, then can be implemented according to the content of the description and the drawing record, and in order to let the above-mentioned purpose of the application and other purposes, features and advantages can be more easily understood, the following combining the specific embodiment of the application and the drawing are explained. BRIEF DESCRIPTION OF DRAWINGS
[0016] The drawings are only used to show the principles, implementation modes, applications, characteristics and effects of the specific embodiments of the application and other related contents, and cannot be considered as the limitation of the application.
[0017] In the drawings of the specification:
[0018] Figure 1 It is a structural schematic view of the silicon carbide heat exchanger of the application;
[0019] Figure 2 A cross section of a silicon carbide heat exchanger Figure One ;
[0020] Figure 3 A cross section of a silicon carbide heat exchanger Figure Two ;
[0021] Figure 4 A cross section of a silicon carbide heat exchanger Figure Three ;
[0022] Figure 5 A shell structure diagram of a silicon carbide heat exchanger.
[0023] The reference signs mentioned in the above-mentioned figures are explained as follows:
[0024] 1, shell, 11, medium inlet, 12, medium outlet, 13, feed pipe, 131, first check valve, 132, regulating valve, 14, discharge pipe, 141, second check valve, 142, flow meter, 143, acid-base meter, 15, saddle, 16, first purge port,
[0025] 2, feed tank, 21, material inlet, 211, third check valve, 22, first flange cover,
[0026] 3, discharge tank, 31, material outlet, 311, fourth check valve, 312, thermometer, 32, second flange cover, 33, second purge port,
[0027] 4, heat exchange module, 41, tube plate, 411, first tube hole, 42, silicon carbide heat exchange tube, 43, baffle, 431, baffle hole, 44, flange, 441, second tube hole. DETAILED DESCRIPTION
[0028] In order to describe possible application scenarios, technical principles, specific implementation schemes, and purposes and effects of the present application in detail, the following will be described in detail in combination with specific embodiments listed below and with the aid of the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical schemes of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.
[0029] In this text, the term "embodiment" means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, each technical feature mentioned in each embodiment can be combined in any way to form a corresponding implementable technical scheme.
[0030] Unless otherwise defined, the technical terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the use of related terms in the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application.
[0031] In the description of the present application, the phrase "and / or" is a description of the logical relationship between objects, which means that there can be three relationships, for example, X and / or Y, which means that there are three cases: X exists, Y exists, and X and Y exist at the same time. In addition, the character " / " in this article generally represents that the associated objects before and after are a "or" logical relationship.
[0032] In the present application, the terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary, or order relationship between the entities or operations.
[0033] In the present application, the "includes", "contains", "has" or other similar expressions used in the sentence are intended to cover non-exclusive inclusion, and these expressions do not exclude the presence of additional elements in the process, method or product including the described elements, so that the process, method or product including a series of elements can not only include those limited elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.
[0034] As the same understanding as in the "Guidelines for Examination", in the present application, "greater than", "less than", "exceed" and the like are understood as not including the number; "above", "below", "within" and the like are understood as including the number. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly limited.
[0035] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and are not intended to indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.
[0036] Unless otherwise clearly indicated or implied to the contrary by context, where the terminology "mount", "connect", "connection", "fixed", "set", and like terms are used herein in the description of the embodiments of the application, they are to be construed broadly and are not to be limited to the specific manner in which they are described herein. For example, the term "connection" can be a fixed connection, or a detachable connection, or an integrated setting; it can be a mechanical connection, or an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium; it can be an internal communication of two elements, or an interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0037] According to some embodiments of the present application, please refer to Figures 1 to 5 The present embodiment relates to a silicon carbide heat exchanger, comprising a shell 1, a feed tank 2, a discharge tank 3 and a heat exchange module 4, the shell 1 is provided with a medium inlet 11, a medium outlet 12 and a first exhaust port 16, the medium inlet 11 is used for connecting the cooling medium, the medium outlet 12 is used for outputting the cooling medium, and the first exhaust port 16 is used for exhausting the cooling medium; the feed tank 2 is distributed at one end of the shell 1, the feed tank 2 is provided with a material inlet 21, the discharge tank 3 is distributed at the other end of the shell 1, the top of the discharge tank 3 is provided with a material outlet 31, and the bottom of the discharge tank 3 is provided with a second exhaust port 33, the second exhaust port 33 is used for exhausting the material; the heat exchange module 4 comprises two tube sheets 41, silicon carbide heat exchange pipes 42 and baffles 43, the silicon carbide heat exchange pipes 42 are located inside the shell 1 and extend outwardly to the outside of the shell 1, the two tube sheets 41 are distributed at both ends of the silicon carbide heat exchange pipes 42, and the baffles 43 are distributed on the silicon carbide heat exchange pipes 42.
[0038] The nitration reaction is an exothermic reaction, which will generate a large amount of heat. If the heat generated by the reaction cannot be removed in time, the reaction temperature will rise, which may cause danger. Therefore, after the nitration liquid comes out of the reactor, it needs to enter the heat exchanger for cooling, so as to ensure that the reaction is carried out in a safe and controllable temperature range.
[0039] The silicon carbide heat exchanger usually uses low-temperature refrigerant medium of -19℃ for heat exchange. During the heat exchange process of the nitration liquid, if the temperature is lower than a certain value, the nitration liquid is easy to precipitate crystals, causing the internal blockage of the heat exchange pipe, so that the internal pressure of the heat exchange pipe rises, thereby the silicon carbide heat exchanger has safety risks. If the pressure of the silicon carbide heat exchange pipe is too large, the pipe bundle will be deformed, the seal will be invalid, the welding part will leak, and other equipment will be damaged, thereby causing safety risks to the operators, production interruption risks, environmental risks and the like. The refrigerant medium of 7℃ water can realize the heat exchange effect of the nitration liquid, while preventing too low temperature from causing the above risks of the silicon carbide heat exchange pipe 42.
[0040] In some embodiments, 7℃ water is used as the cooling medium, and the silicon carbide heat exchanger generates some residual cooling medium and nitration liquid during heat exchange. During the heat exchange process, the cooling medium enters from the medium inlet 11, passes through the shell side, and is discharged from the medium outlet 12, and the nitration liquid enters from the material inlet 21, passes through the silicon carbide pipeline, and is discharged from the material outlet. After a period of time, a certain amount of 7℃ water accumulates in the shell side, and a certain amount of nitration liquid accumulates in the silicon carbide heat exchange pipe 42. The medium outlet 12 and the material outlet 31 are closed, the first drain port 16 and the second drain port 33 are opened, the residual 7℃ water is discharged from the first drain port 16, and the residual nitration liquid is discharged from the second drain port 33. This prevents the residual 7℃ water and nitration liquid from forming an insulating layer, reducing the heat exchange efficiency, avoiding corrosion or wear of the equipment by the residual material, and ensuring the stability and reliability of the equipment operation.
[0041] In some embodiments, the temperature of the nitration liquid flowing out of the reactor outlet is about 28℃, the nitration liquid enters the feed tank 2 through the material inlet 21, passes through the tube sheet 41 into the silicon carbide heat exchange pipe 42, the tube sheet 41 can be made of PFA material, 7℃ water enters the shell 1 of the silicon carbide heat exchanger through the medium inlet 11, and the 7℃ water and the nitration liquid are heat exchanged. At the same time, the baffle 43 changes the flow direction of the 7℃ water, so that the 7℃ water is more quickly spread in the shell side, and the heat exchange process is more efficient. The heat-exchanged nitration liquid flows out through the material outlet 31, and finally the temperature of the nitration liquid is about 17℃, achieving the heat exchange effect.
[0042] The above-mentioned baffle 43 can be made of metal material, ceramic material, rubber material, and polyurethane material, etc., among which rubber material and polyurethane material are preferred, having a damping effect.
[0043] According to some embodiments of the present application, the shell 1 is further provided with a flange 44 at both ends, which is used to connect the tube sheet 41 and the shell 1.
[0044] In this way, the flange 44 fixes the tube sheet 41 and the shell 1 port together, ensuring that the heat exchange module 4 is stably installed between the feed tank 2 and the discharge tank 3. The flange 44 improves the sealing of the connection between the tube sheet 41 and the silicon carbide heat exchange pipe 42, preventing leakage when the material in the feed tank 2 and the discharge tank 3 enters the heat exchange pipe.
[0045] According to some embodiments of the present application, the tube sheet 41 is provided with a first pipe hole 411, and the flange 44 is provided with a second pipe hole 441. The first pipe hole 411 corresponds to the second pipe hole 441 one by one, and the silicon carbide heat exchange pipe 42 is connected to the first pipe hole 411 and the second pipe hole 441.
[0046] In this way, the material in the feed tank 2 is guided to pass through the first tube hole 411 and the second tube hole 441 into the silicon carbide heat exchange tube 42 in sequence, ensuring that the material enters the silicon carbide heat exchange tube 42 from the feed tank 2 in an orderly and stable manner, and then flows out of the silicon carbide heat exchange tube 42 to be transported to the discharge tank 3 in sequence through the second tube hole 441 and the first tube hole 411.
[0047] According to some embodiments of the present application, the baffle plate 43 is optionally provided with a baffle hole 431, and the silicon carbide heat exchange tube 42 penetrates the baffle hole 431.
[0048] In this way, the baffle hole 431 changes the flow direction of the cooling medium, so that the cooling medium forms a complex flow path in the shell side, thereby increasing the contact time and heat exchange area of the cooling medium with the silicon carbide heat exchange tube 42, which helps to improve the heat exchange efficiency of the silicon carbide heat exchanger.
[0049] According to some embodiments of the present application, the shell 1 further comprises a feed pipe 13 installed on the medium inlet 11, and the feed pipe 13 is provided with a first check valve 131 and an adjusting valve 132.
[0050] In this way, the flow of the cooling medium in the feed pipe 13 can be controlled by adjusting the first check valve 131. When the first check valve 131 is opened, the cooling medium in the feed pipe 13 enters the shell 1 through the medium inlet 11, and when the first check valve 131 is closed, the cooling medium in the feed pipe 13 is blocked outside the shell 1. The adjusting valve 132 is used to adjust the flow rate of the cooling medium, so as to flexibly control the amount of cooling medium entering the shell 1 per unit time.
[0051] According to some embodiments of the present application, the shell 1 further comprises a discharge pipe 14 installed on the medium outlet 12, and the discharge pipe 14 is provided with a second check valve 141, a flow meter 142 and a pH meter 143.
[0052] In this way, the output of the cooling medium in the discharge pipe 14 can be controlled by adjusting the second check valve 141. The heat exchange process is accompanied by an increase in the temperature of the cooling medium, and when it is necessary to discharge the water after heat exchange, the second check valve 141 can be opened to discharge the water from the discharge pipe 14. The flow meter 142 is used to monitor the discharge flow of the cooling medium, and the pH meter 143 is used to monitor the pH value of the cooling medium. The above values can be used by the staff to timely understand the flow condition of the cooling medium in the silicon carbide heat exchanger. When the above values exceed the normal range, the staff can timely find the abnormality and take corresponding measures to troubleshoot and repair, so as to avoid failure and prolong the service life of the equipment.
[0053] According to some embodiments of the present application, the material inlet 21 is provided with a third check valve 211, and the material outlet 31 is provided with a fourth check valve 311 and a thermometer 312.
[0054] Thus, by adjusting the third check valve 211 and the fourth check valve 311, the material can be controlled to enter or exit. When the third check valve 211 is opened, the material enters the silicon carbide heat exchanger through the material inlet 21, and when the third check valve 211 is closed, the material stays outside the silicon carbide heat exchanger. After the heat exchange of the material through the silicon carbide heat exchange pipe 42, the temperature of the material decreases, and the thermometer 312 can monitor the cooling effect of the material. When the temperature of the material decreases to a standard range, the fourth check valve 311 is opened to discharge the cooled material.
[0055] In some embodiments, the feed tank 2 is further provided with a pressure gauge to monitor the pressure value of the feed tank 2.
[0056] According to some embodiments of the present application, the shell 1 further comprises two saddles 15 symmetrically arranged at the bottom of the shell 1.
[0057] Thus, the weight of the shell 1 can be supported to ensure the stability of the operation of the silicon carbide heat exchanger.
[0058] According to some embodiments of the present application, the left surface of the feed tank 2 is provided with a first flange cover 22, and the right surface of the discharge tank 3 is provided with a second flange cover 32.
[0059] Thus, the first flange cover 22 and the second flange cover 32 have a sealing effect to prevent the material in the feed tank 2 and the discharge tank 3 from leaking, and can withstand the pressure during the operation of the silicon carbide heat exchanger to ensure the stable operation of the silicon carbide heat exchanger.
[0060] The end of the first flange cover 22 can be fixed to the feed tank 2 by bolts and nuts, and the end of the second flange cover 32 can be fixed to the discharge tank 3 by bolts and nuts. The surface of the feed tank 2 and the discharge tank 3 can be made of glass, and the surface of the glass can be covered with a short connection. The first flange cover 22 and the feed tank 2, and the second flange cover 32 and the discharge tank 3 can be connected together by a tetrafluoroethylene coating pad. The tetrafluoroethylene coating pad has the advantages of corrosion resistance, high temperature resistance, and good sealing performance, which can prevent the material in the feed tank 2 and the discharge tank 3 from leaking.
[0061] Different from the prior art, the technical scheme of the present application is characterized in that a first exhaust port 16 is arranged on the shell 1, and a second exhaust port 33 is arranged at the bottom of the discharge tank 3. After the heat exchange of the cooling medium and the nitration liquid, the first exhaust port 16 can discharge the residual cooling medium, and the second exhaust port 33 can discharge the residual nitration liquid, which can prevent the residual cooling medium and the nitration liquid from forming a heat insulation layer, reduce the heat exchange efficiency, avoid the corrosion or wear of the equipment by the residual material, and ensure the stability and reliability of the operation of the equipment.
[0062] Those skilled in the art will appreciate that the features of the various embodiments can be combined with each other, as means within the scope of the present application and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
[0063] Finally, it should be noted that the above embodiments are merely used to illustrate the technical solutions of the present application, rather than limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.
Claims
1. A silicon carbide heat exchanger, characterized by, The application relates to a heat exchange device. The heat exchange device comprises a shell, a feed tank, a discharge tank and a heat exchange module. The shell is provided with a medium inlet, a medium outlet and a first exhaust port. The medium inlet is used for connecting a cooling medium. The medium outlet is used for discharging the cooling medium.
2. The silicon carbide heat exchanger of claim 1, wherein, The first exhaust port is used for exhausting the cooling medium.
3. The silicon carbide heat exchanger of claim 2, wherein, The feed tank is arranged at one end of the shell and is provided with a material inlet.
4. The silicon carbide heat exchanger of claim 3, wherein, The discharge tank is arranged at the other end of the shell.
5. The silicon carbide heat exchanger of claim 1, wherein, The top of the discharge tank is provided with a material outlet.
6. The silicon carbide heat exchanger of claim 1, wherein, The bottom of the discharge tank is provided with a second exhaust port.
7. The silicon carbide heat exchanger of claim 1, wherein The second exhaust port is used for exhausting the material.
8. The silicon carbide heat exchanger of claim 1, wherein, The heat exchange module comprises two tube sheets, silicon carbide heat exchange tubes and baffles.
9. The silicon carbide heat exchanger of claim 1, wherein, The silicon carbide heat exchange tubes are arranged inside the shell and extend out of the shell. The two tube sheets are arranged at the two ends of the silicon carbide heat exchange tubes. The baffles are arranged on the silicon carbide heat exchange tubes. The heat exchange module further comprises two flanges. The two flanges are arranged at the two ends of the shell respectively. The two flanges are used for connecting the tube sheets and the shell. The tube sheets are provided with first tube holes. The flanges are provided with second tube holes. The first tube holes correspond to the second tube holes one by one. The silicon carbide heat exchange tubes are connected with the first tube holes and the second tube holes. The baffles are provided with baffle holes. The silicon carbide heat exchange tubes penetrate the baffle holes. The shell further comprises a feed pipe. The feed pipe is arranged on the medium inlet. The feed pipe is provided with a first check valve and an adjusting valve. The shell further comprises a discharge pipe. The discharge pipe is arranged on the medium outlet. The discharge pipe is provided with a second check valve, a flow meter and an acid-base meter. The material inlet is provided with a third check valve. The material outlet is provided with a fourth check valve and a thermometer. The shell further comprises two saddles. The two saddles are symmetrically arranged at the bottom of the shell. The left surface of the feed tank is provided with a first flange cover. The right surface of the discharge tank is provided with a second flange cover.