Composite heat exchanger

Abstract

The utility model discloses a composite heat exchanger which comprises a condensation bin, a heat exchanger and a heat exchanger. The ventilation pipeline is arranged in the closed cavity, the ventilation pipeline is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both communicated to the outside of the condensation bin; the condensation pipeline is used for circulation of a condensation medium and performs heat exchange with the ventilation pipeline; a first channel and a second channel which are isolated from each other are arranged in the heat exchange bin; the first channel is communicated with the tail end of the ventilation pipeline so as to convey gas exhausted by the ventilation pipeline; the second channel is used for continuously circulating a high-temperature medium, and the gas in the first channel exchanges heat with the high-temperature medium in the second channel. Through the arrangement, the hydrogen is condensed before being deoxygenized and purified, so that the problem that impurities in the crude hydrogen pollute a catalyst can be reduced, the catalyst is well protected, and the service life of the catalyst is prolonged.

Description

Technical Field

[0001] The present application relates to the field of hydrogen production technology, and in particular to a composite heat exchanger. Background Art

[0002] In the process of preparing hydrogen by the hydrogen production system, the directly obtained hydrogen will contain various impurities, such as oxygen produced simultaneously during the hydrogen production process; therefore, the crude hydrogen, that is, the directly prepared hydrogen, needs to be deoxygenated to improve the purity of the hydrogen; of course, the purity required for hydrogen used in different fields is also different, and different purity purification work can be carried out as needed.

[0003] In the deoxygenation process, catalytic deoxygenation is generally adopted, using a catalyst to promote the chemical reaction of impurity oxygen in hydrogen with hydrogen to produce water, thereby achieving the purpose of removing oxygen; however, the hydrogen directly prepared by the hydrogen production system also contains water. This part of the impurity is directly transported to the inside of the deaerator, which will contaminate the catalyst therein and shorten the service life of the catalyst. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a composite heat exchanger for solving the technical problems of catalyst pollution and shortening of catalyst service life in the crude hydrogen deoxygenation process in the prior art.

[0005] To achieve at least one of the above objectives, this application provides the following technical solutions:

[0006] The embodiment of the present application provides a composite heat exchanger, comprising:

[0007] A condensation chamber with a closed cavity inside;

[0008] A ventilation pipeline is arranged in the closed cavity, and the ventilation pipeline is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the outside of the condensation chamber;

[0009] a condensation pipeline, for circulating the condensation medium and performing heat exchange with the ventilation pipeline;

[0010] It also includes a heat exchange chamber, wherein the heat exchange chamber is provided with a first channel and a second channel isolated from each other;

[0011] The first channel is in communication with the tail end of the ventilation pipeline to transport the gas exhausted from the ventilation pipeline;

[0012] The second channel is used for continuously circulating a high-temperature medium, and the gas in the first channel exchanges heat with the high-temperature medium in the second channel.

[0013] In some embodiments, the gas passage formed by the ventilation pipe in the condensation chamber includes a condensation section and a liquid capture section, and the gas to be condensed flows from the air inlet, sequentially through the condensation section and the liquid capture section, and is discharged from the air outlet;

[0014] The liquid-collecting section is provided with a liquid-collecting member for assisting in collecting condensed water;

[0015] The liquid-catching section is provided with a downward condensation port for discharging condensed water.

[0016] In some embodiments, the condensation pipeline is located in the condensation section; the condensation pipeline is wrapped around the periphery of the liquid capture section.

[0017] In some embodiments, the transmission direction of the condensing medium in the condensing pipeline is opposite to the transmission direction of the gas to be condensed in the condensing section.

[0018] In some embodiments, a ventilation gap is provided between the ventilation pipe and the interior of the condensation chamber;

[0019] The ventilation gap is the condensation section, the channel in the ventilation pipeline is the liquid-catching section, and the end of the liquid-catching section away from the air outlet is the condensation outlet for discharging condensed water.

[0020] In some embodiments, the ventilation line includes an inner tube and an outer tube sleeved outside the inner tube;

[0021] The cross section of the inner tube is rectangular, and the cross section of the outer tube is circular;

[0022] The condensation pipeline is covered on the outer tube.

[0023] In some embodiments, the liquid-catching member includes a plurality of baffles arranged at intervals;

[0024] The plurality of baffles separate the liquid-catching section into a plurality of baffle channels extending in a serpentine shape.

[0025] In some embodiments, the condensation section is directly connected to each of the deflection channels.

[0026] In some embodiments, a plurality of air inlets are provided.

[0027] In some embodiments, the heat exchange chamber is provided with a transfer inlet and an exhaust port, and the transfer inlet is connected to the exhaust port;

[0028] The first channel is in communication with the transfer inlet and the exhaust port;

[0029] The heat exchange chamber is also connected to an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are in communication with the second channel for continuously transporting high-temperature medium into the second channel.

[0030] In some embodiments, the heat exchanger further comprises a heat exchange component disposed in the heat exchange chamber and having a gas passage therein;

[0031] A heat exchange gap is provided between the heat exchange element and the inner wall of the heat exchange chamber;

[0032] The gas channel inside the heat exchange element is the first channel;

[0033] The heat exchange gap is the second channel.

[0034] In some embodiments, the heat exchanger further comprises a heat exchange component disposed in the heat exchange chamber and having a gas passage therein;

[0035] A heat exchange gap is provided between the heat exchange element and the inner wall of the heat exchange chamber;

[0036] The heat exchange gap is the first channel;

[0037] The gas channel inside the heat exchange element is the second channel.

[0038] In some embodiments, the heat exchange chamber is fixedly connected to the condensation chamber;

[0039] The air outlet is directly connected to the transfer inlet.

[0040] In some embodiments, the condensation chamber and the heat exchange chamber are separated;

[0041] A pipe is connected between the air outlet and the transfer inlet, so that the air outlet is communicated with the transfer inlet.

[0042] In the above technical solution, by setting up the composite heat exchanger, before the hydrogen is deoxygenated and purified, the crude hydrogen is connected to the air inlet, so that the crude hydrogen flows through the ventilation pipe, and the condensing medium is introduced into the condensation pipe to condense the crude hydrogen, so that the moisture and impurities therein are condensed and precipitated. After the moisture and impurities are removed, the crude hydrogen is introduced into the deaerator for oxidation reaction, which can reduce the problem of impurities in the crude hydrogen causing contamination of the catalyst, play a better protective role for the catalyst, and extend the service life of the catalyst; and the condensed gas is heated by the set heat exchange chamber, and the subsequent deoxygenation efficiency is higher, the temperature required for heating in the subsequent deoxygenation process is reduced, and energy is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 A schematic diagram of the overall structure of a heat exchanger provided in some embodiments of the present application;

[0045] Figure 2 A perspective structural diagram of a heat exchanger provided in some embodiments of the present application;

[0046] Figure 3 A schematic diagram of the structure of the ventilation pipeline portion provided in some embodiments of the present application;

[0047] Figure 4 A schematic diagram of the coordination relationship between the condensation pipeline and the ventilation pipeline provided in some embodiments of the present application;

[0048] Figure 5 A schematic diagram of the structure of the heat exchange chamber and heat exchange tubes provided in some embodiments of the present application;

[0049] Figure 6 Schematic diagram of the overall structure of the heat exchanger provided in other embodiments of the present application.

[0050] The reference numerals are as follows:

[0051] 1. Condensation chamber, 11. Drain port;

[0052] 2. Ventilation pipe, 21. Condensation section, 22. Liquid collection section, 23. Inner pipe, 24. Outer pipe;

[0053] 2a, air inlet, 2b, air outlet, 2c, condensation outlet;

[0054] 3. Condensation pipeline;

[0055] 4. Baffle;

[0056] 4a, baffle channel;

[0057] 5. Heat exchange chamber, 51. Transfer inlet, 52. Exhaust port, 53. Inlet pipe, 54. Outlet pipe;

[0058] 6. Heat exchange tube. DETAILED DESCRIPTION

[0059] The present application will be further described in detail below through the accompanying drawings and examples, through which the features and advantages of the present application will become more clear and distinct.

[0060] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by technicians in the technical field to which this application belongs; the terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions.

[0061] The phrase "embodiment" mentioned in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive with other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0062] The term "exemplary" is used herein to mean "serving as an example, embodiment, or illustration." Any embodiment described as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0063] In the description of this application, the technical terms "first", "second", "third", etc. are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary and secondary relationship of the indicated technical features.

[0064] In the description of this application, the technical term "and / or" is simply a description of the association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the related objects are in an "or" relationship.

[0065] In the description of this application, the orientations or positional relationships indicated by technical terms such as "upper", "lower", "inside", "outside", "front", "back", "left", "right", "top", and "bottom" are orientations or positional relationships based on the working state of this application. They are only for the convenience of describing this application 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. Therefore, they cannot be understood as limitations on this application.

[0066] In the description of this application, unless otherwise specified or limited, technical terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0067] In the description of this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0068] In the description of the present application, “a plurality of” means two or more (including two), unless otherwise clearly and specifically defined.

[0069] In the description of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, and other dimensions of the integrated device shown in the drawings are merely illustrative and do not constitute any limitation on this application.

[0070] As part of the creative concept of this application, before describing the embodiments of this application, it is necessary to analyze the reasons why crude hydrogen pollutes the catalyst and shortens the service life of the catalyst in the relevant technology, and obtain the technical solution of the embodiments of this application through reasonable analysis.

[0071] In the related art, when deoxygenating the prepared crude hydrogen, the crude hydrogen is passed through a deoxygenator. With the assistance of a catalyst, the impure oxygen reacts with the hydrogen to remove the impurity oxygen in the crude hydrogen. However, the prepared crude hydrogen contains water, which can contaminate the catalyst. As the hydrogen purification process continues, the catalyst is continuously corroded, resulting in a shortened catalyst life and affecting the hydrogen purification process. In addition, during the hydrogen purification process, the crude hydrogen passes through the deoxygenator to remove the oxygen present. When the crude hydrogen temperature is low, the deoxygenation efficiency is low.

[0072] To this end, the present application provides a composite heat exchanger to solve the above technical problems.

[0073] The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings. The technical features involved in the different implementation modes of the present application described below can be combined with each other as long as there is no conflict between them.

[0074] In the embodiment of the present application, a composite heat exchanger is provided, such as Figure 1 and Figure 2 The figure shows the overall structure of the composite heat exchanger and illustrates the internal structure through a perspective structural diagram. The composite heat exchanger comprises a condensation chamber 1, a ventilation pipe 2, and a condensation pipe 3. The condensation chamber 1 has a closed cavity inside. The closed cavity here means that a relatively independent space is formed inside. In actual use, the transfer of internal and external materials can be carried out through a closable channel such as an opening.

[0075] Combined with reference Figure 2 and 3 The ventilation pipe 2 is arranged in the above-mentioned closed cavity for circulating the gas to be condensed. The gas to be condensed referred to here can be hydrogen, oxygen or other similar gases that need to be condensed. In the embodiment of the present application, crude hydrogen is taken as an example of the gas to be condensed; the ventilation pipe 2 is provided with an air inlet 2a and an air outlet 2b, and the air inlet 2a and the air outlet 2b are both connected to the outside of the condensation bin 1. The air inlet 2a is connected to the previous hydrogen preparation system, and the condensed gas is transported to the subsequent processing process through the air outlet 2b.

[0076] Condensation pipe 3 is used to circulate a condensing medium, such as cryogenic water or liquid nitrogen. It exchanges heat with ventilation pipe 2 to condense the crude hydrogen. The condenser pipe has an inlet and an outlet, both of which are connected to the outside of condensation chamber 1 and to external storage equipment, forming a condensing medium circuit.

[0077] Referring to the figure, the composite heat exchanger also includes a heat exchange chamber 5, also a hollow structure with a cavity inside. Within the chamber are isolated first and second channels. The first channel communicates with the tail end of the vent line 2 to transport gas discharged from the vent line and condensed crude hydrogen. The second channel continuously circulates a high-temperature medium. The gas in the first channel exchanges heat with the high-temperature medium in the second channel, raising the temperature of the gas transported in the first channel and heating the condensed crude hydrogen.

[0078] By setting up the composite heat exchanger, before deoxygenating and purifying the hydrogen, the crude hydrogen is connected to the air inlet 2a, so that the crude hydrogen flows through the ventilation pipe 2 and the condensing medium is introduced into the condensation pipe 3 to condense the crude hydrogen, so that the moisture and impurities therein are condensed and precipitated. After the moisture and impurities are removed, the crude hydrogen is introduced into the deaerator for oxidation reaction. This can reduce the problem of moisture and impurities in the crude hydrogen causing contamination of the catalyst, provide better protection for the catalyst, and extend the service life of the catalyst.

[0079] Furthermore, after the crude hydrogen is condensed, it is introduced into the heat exchange chamber for heating, thereby increasing the temperature of the crude hydrogen and raising the temperature of the crude hydrogen output by the composite heat exchanger. When the crude hydrogen is subsequently transported to the deaerator for deoxygenation, the deaerator does not need to heat the crude hydrogen during the treatment stage, or only needs to operate at a lower power after turning on the heating function, and can keep the crude hydrogen in a suitable higher temperature range, thereby improving efficiency, reducing the energy consumption of the deaerator, and saving energy.

[0080] In addition, the high-temperature medium introduced into the second channel is, for example, a high-temperature gas from a regeneration tower, or high-temperature hydrogen that has undergone deoxygenation treatment. Regarding the high-temperature gas from the regeneration tower, the details are as follows: During the hydrogen purification process, an adsorbent is required to purify the hydrogen and adsorb some of the impurities in the hydrogen. As the amount of adsorbed impurities increases, the adsorption capacity of the adsorbent decreases, necessitating regeneration. Specifically, the adsorbent is heated to precipitate the adsorbed impurities, and then purged with clean gas to remove the precipitated impurities, allowing the adsorbent to be reused.

[0081] Among them, clean gas, such as hydrogen, will be heated to a higher temperature to purge the adsorbent and remove impurities. This part of the high-temperature gas will be passed into the composite heat exchanger to heat the hydrogen after condensation. This not only increases the temperature of the hydrogen and improves the efficiency of subsequent deoxygenation, but also can reasonably utilize the energy in other processes and alleviate the problem of energy waste.

[0082] refer to Figure 3 The gas passage formed by the ventilation pipe 2 in the condensation chamber 1 includes a condensation section 21 and a liquid capture section 22. It should be noted that the gas passage formed by the ventilation pipe 2 in the condensation chamber 1 can be a passage formed by the ventilation pipe 2 itself, or a passage formed by the ventilation pipe 2 and the condensation chamber 1 in combination.

[0083] Crude hydrogen is fed into the gas passageway via the gas inlet 2a, flows sequentially through the condensation section 21 and the liquid capture section 22, and is discharged through the gas outlet 2b. The liquid capture section 22 is provided with a liquid capture member to assist in collecting condensed water, and the liquid capture section 22 is provided with a downward-facing condensation outlet 2c for condensed water discharge. The downward-facing condensation outlet 2c referred to herein does not necessarily limit its opening to a vertical orientation; it can also have a certain inclination angle, as long as it does not hinder the smooth discharge of condensed water from the liquid capture section 22. In the present embodiment, the condensation outlet 2c is oriented vertically downward as an example.

[0084] Correspondingly, after being discharged from the liquid-capturing section 22, the condensed water accumulates at the bottom of the condensation chamber 1. A drain port 11 is provided at the bottom of the condensation chamber 1 for draining the condensed water. The drain port 11 can be opened or closed as needed. After the condensed water accumulates to a certain amount, the condensed water is discharged for unified treatment. In other embodiments, a receiving container can be provided at the condensation port 2c of the liquid-capturing section 22 to temporarily store the generated condensed water, and a drain port 11 can be provided at the bottom of the receiving container to transport the condensed water outside the condensation chamber 1.

[0085] refer to Figure 3 and Figure 4 The condensation pipeline 3 is located in the condensation section 21 and is wrapped around the outer periphery of the liquid-catching section 22. Thus, in the actual process of condensing the crude hydrogen, the crude hydrogen flows from the air inlet 2a through the condensation section 21 and the liquid-catching section 22 in sequence, and is discharged from the air outlet 2b. During the transmission of the crude hydrogen in the condensation section 21, heat is exchanged with the condensation pipeline 3 arranged in the condensation section 21 to reduce the temperature of the crude hydrogen, and the water impurities therein are gradually condensed, and then transmitted to the liquid-catching section 22, so that the water cooled and condensed in the condensation section 21 is separated from the gas.

[0086] The above-mentioned covering setting method saves space compared to the structure in which the condensation section 21 and the liquid capture section 22 are arranged in the same set direction; and in the structure of the present application, the condensation pipeline 3 not only cools the crude hydrogen in the condensation section 21, but also can continuously cool the crude hydrogen transmitted in the liquid capture section 22, so that the crude hydrogen can always maintain a low temperature during the transmission process in the condensation bin 1; in contrast, the structure in the prior art requires that the condensation pipeline 3 be set on the entire stroke of the ventilation pipeline 2, otherwise the condensation effect of the gas to be condensed will be reduced.

[0087] Specifically, the condensation bin 1 is a can-shaped container, the ventilation pipe 2 is located in the can-shaped container, and a ventilation gap is provided between the ventilation pipe 2 and the inner wall of the condensation bin 1; wherein, the ventilation gap is the above-mentioned condensation section 21, and the channel formed inside the ventilation pipe 2 is the above-mentioned liquid capture section 22.

[0088] Taking the vertical placement of the condensation bin 1 as an example, the air inlet 2a and the air outlet 2b are both located on the upper side of the condensation bin 1. During the transmission of the condensed gas in the ventilation pipe 2, it is first transmitted downward in the condensation section 21 and then transmitted upward in the liquid capture section 22.

[0089] refer to Figure 3 The ventilation line 2 comprises an inner tube 23 and an outer tube 24 sheathed over the inner tube 23. The inner tube 23 has a rectangular cross-section, while the outer tube 24 has a circular cross-section. Both ends of the outer tube 24 are sealed, forming a cavity isolated from the outside. Both ends of the inner tube 23 are open, forming a channel for gas circulation. The downward opening of the inner tube 23 serves as the condensation port 2c, while the upward opening serves as the gas outlet 2b. The condensation line 3 is wrapped around and covered with the outer tube 24.

[0090] After being transported into the condensation chamber 1 , the crude hydrogen is first transmitted downward in the condensation section 21 and then transmitted from the lower end opening of the inner tube 23 to the interior of the inner tube 23 , namely, the liquid-collecting section 22 .

[0091] In addition, setting the cross-section of the inner tube 23 to a rectangular shape makes it easier to install a liquid-catching member inside it. Compared to setting the cross-section of the inner tube 23 to a circular shape, the rectangular structure is more conducive to connecting the liquid-catching member to the inner tube 21. It also reduces the limitations of the circular structure itself, resulting in the high requirements for the size of each part of the liquid-catching member to adapt to different parts of the circle. This reduces the difficulty of processing the liquid-catching member and is more conducive to ensuring the compatibility of the liquid-catching member with the inner tube 21. Setting the cross-section of the outer tube 22 to a circular shape is more conducive to winding the condensing pipe 3 around the outside of it, compared to a rectangular or other polygonal shape. It can also increase the contact area between the condensing pipe 3 and the outer tube, and improve the heat transfer efficiency.

[0092] In addition, combined with reference Figure 3 and Figure 4 The direction of condensation medium transmission within condensation line 3 is opposite to the direction of crude hydrogen transmission within condensation section 21. Taking the downward transmission of crude hydrogen within condensation section 21 as an example, the condensation medium is transmitted upward within condensation line 3. It should be noted that condensation line 3 is wrapped around and enclosed by ventilation line 2, and the condensation medium in condensation line 3 has a spiral upward trend.

[0093] On the one hand, the condensing medium is transported from bottom to top within condensing line 3, ensuring that the condensing medium fills the interior of condensing line 3, resulting in higher condensation efficiency. On the other hand, the crude hydrogen gradually decreases in temperature from top to bottom within condensing section 21. Correspondingly, the condensing medium also gradually decreases in temperature from top to bottom within condensing line 3. This maintains a high heat exchange efficiency between the condensing medium and the crude hydrogen throughout the entire flow path, resulting in higher overall crude hydrogen condensation efficiency.

[0094] refer to Figure 1 A plurality of air inlets 2a are provided, each of which is connected to a different crude hydrogen source, and crude hydrogen from different sources is introduced into the vent line 2. For example, in actual production, there are many different methods for preparing hydrogen, such as alkaline water electrolysis technology, proton exchange membrane water electrolysis technology, anion exchange membrane water electrolysis technology, and high-temperature solid oxide water electrolysis technology. Hydrogen prepared by different preparation systems is connected to different air inlets 2a, introduced into the condensation section 21 for heat exchange, and crude hydrogen from different sources is mixed in the condensation section 21, which can play a good buffering role.

[0095] For example, the multiple air inlets 2 a are evenly distributed at intervals, which is beneficial to improving the uniformity of mixing of the multiple streams of crude hydrogen gas in the condensation section 21 .

[0096] It should be noted that in other schematic diagrams, only one of the air inlets 2a is shown as an example in order to avoid blocking or interfering with the structure to be shown and affecting understanding.

[0097] refer to Figure 3 The liquid-catching component includes a plurality of baffles 4 arranged at intervals. The baffles 4 have a reciprocating bending structure. The baffles 4 are fixedly connected to the inner wall of the outer tube 24, dividing the liquid-catching section 22 into a plurality of serpentine-shaped baffle channels 4a. The condensing section 21 is directly connected to each baffle channel 4a, so that the crude hydrogen can be more evenly transferred from the condensing section 21 to each baffle channel 4a.

[0098] As crude hydrogen is transported within the baffle channel 4a, it continuously impacts the curved portion of the baffle 4. After impacting the curved portion, the hydrogen changes direction and continues upward. Condensed water and impurities carried by the hydrogen, however, impact the curved portion of the baffle 4 and adhere to it. As the crude hydrogen continues to be transported, the amount of condensed water and impurities accumulated on the baffle 4 gradually increases, flowing downward along the baffle 4 and dripping out of the condensation port 2c. Compared to direct upward transport of crude hydrogen, this improves the efficiency of separating condensed water from hydrogen. Specifically, after condensing the crude hydrogen, the efficiency of removing condensed water is higher.

[0099] refer to Figure 5 , and combined with reference Figure 2 The heat exchange chamber 5 is equipped with a transfer inlet 51 and an exhaust port 52. The transfer inlet 51 is connected to the gas outlet 2b, and the exhaust port 52 is connected to the subsequent equipment for deoxygenating the hydrogen. The first channel is connected to the transfer inlet 51 and the exhaust port 52, and is used to transport the hydrogen discharged from the gas outlet 2b. The hydrogen is transported from the transfer inlet 51 to the first channel and then to the exhaust port 52 for discharge.

[0100] In addition, the heat exchange chamber 5 is also connected to an air inlet pipe 53 and an air outlet pipe 54, both of which are connected to the second channel for transporting high-temperature medium into the second channel. The high-temperature medium exchanges heat with the hydrogen in the first channel to achieve heating of the hydrogen.

[0101] refer to Figure 5 Heat exchange chamber 5 is provided with a heat exchange element, which has a gas passageway therein. Exemplarily, the heat exchange element is a heat exchange tube 6. Multiple heat exchange tubes 6 are evenly arranged in an array within heat exchange chamber 5. Heat exchange gaps for medium circulation are provided between adjacent heat exchange tubes 6 and between the heat exchange tubes 6 and the interior of heat exchange chamber 5. Specifically, heat exchange chamber 5 also has a can-shaped structure, with multiple heat exchange tubes 6 extending from a transfer inlet 51 toward an exhaust port 52.

[0102] The gas channel inside the heat exchange tube 6 is the first channel, which is connected to the transfer inlet 51 and the exhaust port 52 and is used to transmit the hydrogen that has been condensed. The above-mentioned heat exchange gap is the second channel. The air inlet pipe 53 and the air outlet pipe 54 are connected to the heat exchange gap, and high-temperature medium is transported into it to heat the hydrogen transmitted inside the heat exchange tube 6.

[0103] After the crude hydrogen is condensed, water and impurities are removed from it, and then it is introduced into the heat exchange chamber 5. The high-temperature medium in the heat exchange chamber 5 heats the condensed and dehydrated hydrogen, so that the discharged hydrogen is at a higher temperature. The subsequent deoxygenation process catalyzes the reaction of oxygen. A higher temperature is conducive to increasing the oxygen reaction rate. By heating in the heat exchange chamber 5, the subsequent deoxygenation efficiency is improved.

[0104] During specific use, hydrogen is transmitted in the heat exchange tube 6, and during the process, heat is exchanged with the high-temperature medium in the heat exchange gap, thereby heating the hydrogen and increasing the hydrogen temperature to improve the deoxygenation efficiency in the subsequent deoxygenation process; and multiple heat exchange tubes 6 are evenly arranged in an array in the heat exchange bin 5, which has a better heating effect on the hydrogen and more uniform heating of each part of the hydrogen.

[0105] In another embodiment, the above-mentioned heat exchange gap is a first channel, the transfer inlet 51 and the exhaust port 52 are connected to the heat exchange gap, and the hydrogen that has been condensed is transmitted through the heat exchange gap; the gas channel inside the heat exchange tube 6 is a second channel, the air inlet pipe 53 and the air outlet pipe 54 are connected to multiple heat exchange tubes 6, and high-temperature medium is transported to the heat exchange tube 6 to heat the hydrogen transmitted in the heat exchange gap.

[0106] In other embodiments, two sets of ventilation ducts can be provided in the heat exchange chamber 5. One set of ventilation ducts has a first internal passageway, connected to the transfer inlet 51 and the exhaust port 52, for transmitting condensed hydrogen. The other set of ventilation ducts has a second internal passageway, connected to the inlet pipe 53 and the outlet pipe 54, for transmitting a high-temperature medium, thereby heating the hydrogen. For the two sets of ventilation ducts, one set can be spirally wound around the outside of the other to improve heat exchange efficiency.

[0107] In addition, combined with reference Figure 1 and Figure 6 In actual design, the condensing bin 1 and the heat exchange bin 5 can be set as an integrated structure or a split structure according to actual needs. For example, when set as an integrated structure, the condensing bin 1 and the heat exchange bin 5 are directly fixedly connected, and a flange is set at one end where the condensing bin 1 and the heat exchange bin 5 are connected, so that the two can be directly fixedly connected, and the air outlet 2b is directly connected to the transfer inlet 51 to achieve gas transportation, which can enhance the integrity of the composite heat exchanger. When set as a split structure, the condensing bin 1 and the heat exchange bin 5 are two independent structures, and the air outlet 2b is connected to the transfer inlet 51 through a pipe to achieve gas transportation. In this way, the condensing bin 1 and the heat exchange bin 5 can be arranged more conveniently according to actual conditions, thereby improving the convenience of use.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A composite heat exchanger, characterized in that: include, A condensation chamber with a closed cavity inside; A ventilation pipeline is arranged in the closed cavity, and the ventilation pipeline is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the outside of the condensation chamber; a condensation pipeline, for circulating the condensation medium and performing heat exchange with the ventilation pipeline; It also includes a heat exchange chamber, wherein the heat exchange chamber is provided with a first channel and a second channel isolated from each other; The first channel is in communication with the tail end of the ventilation pipeline to transport the gas exhausted from the ventilation pipeline; The second channel is used for continuously circulating a high-temperature medium, and the gas in the first channel exchanges heat with the high-temperature medium in the second channel.

2. The composite heat exchanger according to claim 1, characterized in that The gas passage formed by the ventilation pipeline in the condensation chamber includes a condensation section and a liquid capture section, and the gas to be condensed flows from the air inlet, sequentially through the condensation section and the liquid capture section, and is discharged from the air outlet; The liquid-collecting section is provided with a liquid-collecting member for assisting in collecting condensed water; The liquid-catching section is provided with a downward condensation port for discharging condensed water.

3. The composite heat exchanger according to claim 2, characterized in that: The condensation pipeline is located in the condensation section; the condensation pipeline is covered on the periphery of the liquid-catching section.

4. The composite heat exchanger according to claim 3, characterized in that: The transmission direction of the condensing medium in the condensing pipeline is opposite to the transmission direction of the gas to be condensed in the condensing section.

5. The composite heat exchanger according to claim 3, characterized in that: A ventilation gap is provided between the ventilation pipeline and the interior of the condensation bin; The ventilation gap is the condensation section, the channel in the ventilation pipeline is the liquid-catching section, and the end of the liquid-catching section away from the air outlet is the condensation outlet for discharging condensed water.

6. The composite heat exchanger according to claim 5, characterized in that: The ventilation pipeline includes an inner tube and an outer tube sleeved outside the inner tube; The cross section of the inner tube is rectangular, and the cross section of the outer tube is circular; The condensation pipeline is covered on the outer tube.

7. The composite heat exchanger according to claim 1, characterized in that: The liquid-catching member comprises a plurality of baffles arranged at intervals; The plurality of baffles separate the liquid-catching section into a plurality of baffle channels extending in a serpentine shape.

8. The composite heat exchanger according to claim 7, characterized in that: The condensation section is directly connected to each of the baffle channels.

9. The composite heat exchanger according to claim 1, characterized in that: There are multiple air inlets.

10. The composite heat exchanger according to claim 1, characterized in that: The heat exchange chamber is provided with a transfer inlet and an exhaust port, and the transfer inlet is connected to the exhaust port; The first channel is in communication with the transfer inlet and the exhaust port; The heat exchange chamber is also connected to an air inlet pipe and an air outlet pipe, and the air inlet pipe and the air outlet pipe are in communication with the second channel for continuously transporting high-temperature medium into the second channel.

11. The composite heat exchanger according to claim 10, characterized in that: It also includes a heat exchange component disposed in the heat exchange chamber and having a gas channel therein; A heat exchange gap is provided between the heat exchange element and the inner wall of the heat exchange chamber; The gas channel inside the heat exchange element is the first channel; The heat exchange gap is the second channel.

12. The composite heat exchanger according to claim 10, characterized in that: It also includes a heat exchange component disposed in the heat exchange chamber and having a gas channel therein; A heat exchange gap is provided between the heat exchange element and the inner wall of the heat exchange chamber; The heat exchange gap is the first channel; The gas channel inside the heat exchange element is the second channel.

13. The composite heat exchanger according to claim 10, characterized in that: The heat exchange chamber is fixedly connected to the condensation chamber; The air outlet is directly connected to the transfer inlet.

14. The composite heat exchanger according to claim 10, characterized in that: The condensation chamber and the heat exchange chamber are separated; A pipe is connected between the air outlet and the transfer inlet, so that the air outlet is communicated with the transfer inlet.

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