Liquid nitrogen gasification device

Abstract

The utility model discloses a liquid nitrogen gasification device, which relates to the technical field of gasification equipment, and comprises a plurality of finned tube groups arranged in an array; the connecting units are arranged among part of the finned tube groups and are used for connecting part of the finned tube groups; the preheating assembly is installed on the connecting unit, the preheating assembly can generate heat, and the heat can be conducted to the finned tube set through the connecting unit; a containing space is formed in the support, the multiple finned tube sets, the connecting unit and the preheating unit are all arranged in the containing space, the preheating assembly is arranged on the connecting unit, before liquid nitrogen enters the finned tube sets, the preheating assembly is started firstly, the preheating assembly is powered on to generate heat, and the heat is conducted to the connecting unit; the connecting unit is connected with the finned tube set, heat can be conducted to the surface and the periphery of the finned tube set through the connecting unit, the finned tube set is preheated, frosting caused by the fact that the temperature of the surface of the finned tube set is reduced after liquid nitrogen is introduced into the finned tube set is avoided, and therefore the heat exchange efficiency is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of gasification equipment technology, and more specifically, to a liquid nitrogen gasification device. Background Technology

[0002] Liquid nitrogen vaporization is achieved through heating. The liquid nitrogen vaporizer heats the liquid nitrogen, causing it to change from a liquid to a gaseous state. During the heating process, the liquid nitrogen absorbs heat, which increases the distance between its molecules, reduces its viscosity, and eventually completely transforms into gaseous nitrogen.

[0003] In related technologies, air-temperature vaporizers are commonly used liquid nitrogen vaporization devices. They are mainly composed of components such as supports, finned tubes, and fluid inlet and outlet pipes. Liquid nitrogen is introduced into the finned tubes through the inlet pipe. The air around the finned tubes exchanges heat with the cold liquid nitrogen inside the tubes, causing the air temperature to drop, which in turn triggers airflow. New hot air rushes into the vicinity of the finned tubes to continue heat exchange. After heat exchange, the liquid nitrogen inside the tubes evaporates into a gaseous state and is finally sent out through the outlet pipe.

[0004] The problem with the related technology is that during the process of liquid nitrogen being introduced into the finned tube, the surface temperature of the finned tube will drop rapidly. When the relatively warm outside air approaches, the moisture in the air is easily condensed on the tube wall to form frost. The frost-covered finned tube will reduce the heat exchange efficiency between the liquid nitrogen and the outside air.

[0005] In summary, how to maintain a high heat exchange efficiency between liquid nitrogen and external air is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a liquid nitrogen vaporization device that effectively ensures the heat exchange efficiency between liquid nitrogen and external air.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A liquid nitrogen vaporization device, comprising:

[0009] The finned tube assembly is provided in multiple sets, and the multiple sets of the finned tube assembly are arranged in an array.

[0010] A connecting unit is disposed between some of the fin tube assemblies to connect some of the fin tube assemblies;

[0011] A preheating component is installed on the connecting unit. The preheating component can generate heat, which can be conducted to the finned tube assembly through the connecting unit.

[0012] The support has an internal accommodating space, in which multiple sets of the finned tubes, connecting units, and preheating units are disposed.

[0013] Preferably, the support is equipped with a liquid inlet pipe and an air outlet pipe, and each group of finned tubes has a liquid inlet and an air outlet. The liquid inlet pipe is connected to the liquid inlet of the finned tube group, and the air outlet pipe is connected to the air outlet of each group of finned tubes.

[0014] Preferably, the finned tube assembly comprises:

[0015] The heat exchange tube section is provided in multiple sections, which are spaced apart and parallel to each other.

[0016] A connecting pipe section is provided between two adjacent heat exchange pipe sections to connect multiple heat exchange pipe sections in series;

[0017] The heat exchange tube section and the connecting tube section have interconnected internal flow channels, and the heat exchange tube section has an external flow channel on its outer side.

[0018] Preferably, the heat exchange tube section includes a cylindrical part and a finned part. The finned part is integrally formed on the outside of the cylindrical part and extends radially along the cylindrical part. Multiple finned parts are provided, and the outer flow channel is formed between two adjacent finned parts.

[0019] Preferably, the fin portion is further provided with a plurality of protrusions, the plurality of protrusions being distributed at intervals along the horizontal direction of the fin portion, and each of the protrusions being arranged intersecting with the fin portion.

[0020] Preferably, there are multiple connecting units, which are divided into two groups. Several connecting units in the same group are located in the same horizontal plane. One group of connecting units is located near the upper end of the finned tube assembly, and the other group of connecting units is located near the lower end of the finned tube assembly. Each connecting unit is equipped with a preheating component.

[0021] Preferably, the connection unit includes a mounting base and multiple connectors. The mounting base is disposed between some of the finned tube groups, and the multiple connectors are integrally formed on the outside of the mounting base and extend to each group of finned tube groups. Each group of finned tube groups is connected to the corresponding connector.

[0022] Preferably, the mounting base has a mounting hole, and the preheating component is disposed within the mounting hole. The preheating component includes:

[0023] An electric heating ring is detachably installed in the mounting hole, with a gap between the electric heating ring and the mounting base;

[0024] Multiple heat-conducting elements are provided, and the multiple heat-conducting elements are evenly distributed in the gap to enable heat conduction.

[0025] This application can achieve at least one of the following beneficial technical effects:

[0026] By setting a preheating component on the connecting unit, the preheating component is activated before liquid nitrogen enters the finned tube assembly. It generates heat through power and conducts it to the connecting unit. Since the connecting unit is connected to the finned tube assembly, the heat is then conducted to the surface of the finned tube assembly and its surroundings through the connecting unit, preheating the finned tube assembly and preventing the surface temperature of the finned tube assembly from dropping and frosting after liquid nitrogen is introduced into the finned tube assembly, thereby ensuring heat exchange efficiency. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a front view schematic diagram of a liquid nitrogen vaporization device;

[0029] Figure 2 This is a side view of the liquid nitrogen vaporization device.

[0030] Figure 3 This is a top-view cross-sectional structural diagram of a liquid nitrogen vaporization device.

[0031] Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0032] Figures 1-4 In the accompanying drawings, the reference numerals include:

[0033] 1. Finned tube assembly;

[0034] 11. Heat exchanger tube section; 111. Cylindrical section; 112. Finned section; 113. Protrusion;

[0035] 12. Connecting pipe section; 13. Internal flow channel; 14. External flow channel;

[0036] 2. Connection unit; 21. Mounting base; 22. Connector;

[0037] 3. Preheating assembly; 31. Electric heating ring; 32. Heat-conducting component;

[0038] 4. Support; 5. Liquid inlet pipe; 6. Gas outlet pipe. Detailed Implementation

[0039] 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 protection scope of the present utility model.

[0040] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar words used in this utility model do not indicate any order, quantity, or importance. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. An embodiment of this application discloses a liquid nitrogen vaporization device.

[0041] The core of this invention is to provide a liquid nitrogen vaporization device.

[0042] Please refer to Figures 1 to 4 ,in Figure 1 This is a front view schematic diagram of a liquid nitrogen vaporization device; Figure 2 This is a side view of the liquid nitrogen vaporization device. Figure 3 This is a top-view cross-sectional structural diagram of a liquid nitrogen vaporization device. Figure 4 for Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0043] The liquid nitrogen vaporization device provided by this utility model includes a support 4. The support 4 has a rectangular frame structure and is made of multiple metal rods welded together to form a square accommodating space inside the support 4. The four corners of the lower end of the support 4 are provided with support feet to provide basic support for the support 4 and the various components in the accommodating space. It can be understood that in order to improve the friction between the support 4 and the support surface, each support foot should be set to have sufficient contact area with the support surface.

[0044] Reference Figure 1 and Figure 2The liquid nitrogen vaporization device also includes multiple sets of finned tube assemblies 1, which are arranged in an array within the accommodating space of the aforementioned support 4. Each set of finned tube assemblies 1 has a liquid inlet and a gas outlet. Correspondingly, the support 4 is equipped with a liquid inlet pipe 5 and a gas outlet pipe 6. The liquid inlet of each set of finned tube assemblies 1 is connected to the liquid inlet pipe 5, and the gas outlet of each set of finned tube assemblies 1 is connected to the gas outlet pipe 6. In actual operation, the liquid inlet pipe 5 is connected to a pump body through a pipe. The pump body pumps the liquid nitrogen in the storage unit to the liquid inlet pipe 5, thereby introducing the liquid nitrogen into the finned tube assembly 1. Through heat exchange between the liquid nitrogen in the finned tube assembly 1 and the outside air, the liquid nitrogen evaporates into a gaseous state and is finally discharged from the gas outlet pipe 6.

[0045] Furthermore, specifically, each finned tube group 1 is located in a vertical plane. According to the actual design, the length direction of the vertical plane can be parallel to the length direction of the support 4. Multiple finned tube groups 1 are distributed at intervals along the width direction of the support 4. When this structure is adopted, the liquid inlet pipe 5 and the air outlet pipe 6 are preferably extended along the width direction of the support 4.

[0046] Furthermore, each finned tube assembly 1 consists of heat exchange tube segments 11 and connecting tube segments 12. There are multiple heat exchange tube segments 11 and connecting tube segments 12. The multiple heat exchange tube segments 11 are distributed at intervals and parallel to each other. The extension direction of each heat exchange tube segment 11 is the same as the height direction of the support 4. Each connecting tube segment 12 is set between two adjacent heat exchange tube segments 11 to connect multiple heat exchange tube segments 11 in series, so that the finned tube assembly 1 as a whole has a serpentine structure.

[0047] Reference Figure 3 and Figure 4 The heat exchange tube section 11 includes a cylindrical section 111 and a finned section 112. The interior of the cylindrical section 111 is connected to the connecting tube section 12 to form an inner flow channel, which is supplied with liquid nitrogen. Multiple finned sections 112 are formed on the outer periphery of the cylindrical section 111. The multiple finned sections 112 extend radially along the cylindrical section 111 on the horizontal plane and axially along the cylindrical section 111 on the vertical plane. An outer flow channel is formed between two adjacent finned sections 112, which is supplied with external air.

[0048] With the above structure, when liquid nitrogen is introduced into the inner flow channel, the relatively hot air outside flows in the outer flow channel and exchanges heat with the liquid nitrogen through the fin part 112 and the cylindrical part 111. After the heat exchange is completed, the temperature of this part of the air decreases, causing air flow. New hot air rushes into the outer flow channel to continue the heat exchange. After the heat exchange is completed, the liquid nitrogen in the inner flow channel is converted into a gaseous state and sent out through the air outlet pipe 6.

[0049] In one preferred embodiment of this application, each fin portion 112 is provided with a plurality of protrusions 113. The plurality of protrusions 113 are distributed at intervals in the horizontal direction of the fin portion 112 and intersect with the plane on which the fin portion 112 is located, so that the external air has a larger contact area with the fin portion 112, thereby improving the heat exchange efficiency. Preferably, the plane on which each protrusion 113 is located is perpendicular to the plane on which the fin portion 112 is located.

[0050] Reference Figure 3 In the accommodating space of the support 4, a connecting unit 2 is also provided. The connecting unit 2 is located between multiple finned tube groups 1. Specifically, there are multiple connecting units 2 and they are divided into two groups. Several connecting units 2 in the same group are located in the same plane. The two groups of connecting units 2 are respectively located at the upper and lower ends of the finned tube group 1.

[0051] Furthermore, based on the number of heat exchange tube segments 11 in a single finned tube group 1, several connecting units 2 in the same group are respectively arranged between two adjacent heat exchange tube segments 11. The connecting unit 2 includes a mounting base 21 and a connector 22. The mounting base 21 is located in the middle, and there are four connectors 22 located at the four corners of the mounting base 21. Each connector 22 extends to the corresponding heat exchange tube segment 11 and is connected to the finned portion 112 of the heat exchange tube segment 11 through a connecting structure. The arrangement of the connecting unit 2 can improve the overall structural stability of the liquid nitrogen vaporization device.

[0052] Reference Figure 3 A mounting hole is formed on the connecting seat, and a preheating component 3 is installed in the mounting hole. The preheating component 3 includes an electric heating ring 31 and heat-conducting elements 32. The electric heating ring 31 is detachably installed in the middle of the mounting hole, and a certain gap is formed between the electric heating ring 31 and the inner wall of the connecting seat. Multiple heat-conducting elements 32 are evenly distributed in the gap. When the electric heating ring 31 is energized, the heat generated is transferred to the connecting seat through the heat-conducting elements 32, and then conducted to the connecting element 22 through the connecting seat. Finally, it is conducted to each heat exchange tube section 11 through the connecting element 22, thereby increasing the surface temperature of the heat exchange tube section 11 and preventing frost formation when liquid nitrogen is introduced, which would affect the heat exchange efficiency. The heat-conducting elements 32, the connecting seat, and the connecting element 22 can be made of materials with good thermal conductivity, such as copper sheets or aluminum plates, and are not limited here. In addition, the electric heating ring 31 directly adopts existing technology, and its heat generation principle and specific structure are known to those skilled in the art, and will not be described in detail here.

[0053] The implementation principle of the liquid nitrogen vaporization device in this application embodiment is as follows: First, the preheating component 3 is started to preheat the heat exchange tube section 11. Then, the external pump pumps the liquid nitrogen into the finned tube group 1 through the liquid inlet pipe 5. The liquid nitrogen flows through each heat exchange tube section 11 and the connecting pipe section 12 to the gas outlet pipe 6. During the flow, the external air flowing in the outer channel exchanges heat with the liquid nitrogen through the finned part 112, converting the liquid nitrogen into a gaseous state. During the liquid nitrogen vaporization process, the preheating component 3 can be kept open to improve the heat exchange efficiency; or it can be closed after the heat exchange tube section 11 is heated to a certain degree to save energy; or the preheating component 3 can be set to open and close at a time.

[0054] The liquid nitrogen vaporization device provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A liquid nitrogen vaporization device, characterized in that, include: The finned tube group (1) is provided in multiple groups, and the multiple groups of the finned tube group (1) are arranged in an array; A connecting unit (2) is disposed between some of the fin tube groups (1) to connect some of the fin tube groups (1); The preheating component (3) is installed on the connecting unit (2). The preheating component (3) can generate heat, and the heat can be conducted to the finned tube assembly (1) through the connecting unit (2). The support (4) has an internal accommodating space, and multiple sets of the finned tube group (1), the connecting unit (2) and the preheating unit are all arranged in the accommodating space.

2. The liquid nitrogen vaporization device according to claim 1, characterized in that, The bracket (4) is equipped with an inlet pipe (5) and an outlet pipe (6). Each finned tube group (1) has an inlet and an outlet. The inlet pipe (5) is connected to the inlet of the finned tube group (1), and the outlet pipe (6) is connected to the outlet of each finned tube group (1).

3. A liquid nitrogen vaporization device according to claim 1 or 2, characterized in that, The finned tube assembly (1) includes: The heat exchange tube section (11) is provided in multiple sections, and the multiple heat exchange tube sections (11) are distributed at intervals and parallel to each other; A connecting pipe section (12) is provided between two adjacent heat exchange pipe sections (11) to connect multiple heat exchange pipe sections (11) in series; The heat exchange tube section (11) and the connecting tube section (12) have interconnected internal flow channels, and the heat exchange tube section (11) has an external flow channel on its outer side.

4. The liquid nitrogen vaporization device according to claim 3, characterized in that, The heat exchange tube section (11) includes a cylindrical part (111) and a finned part (112). The finned part (112) is integrally formed on the outside of the cylindrical part (111) and extends radially along the cylindrical part (111). Multiple finned parts (112) are provided. The outer flow channel is formed between two adjacent finned parts (112).

5. The liquid nitrogen vaporization device according to claim 4, characterized in that, The fin portion (112) is also provided with a plurality of protrusions (113), which are distributed at intervals along the horizontal direction of the fin portion (112), and each of the protrusions (113) is arranged to cross the fin portion (112).

6. The liquid nitrogen vaporization device according to claim 1, characterized in that, The connection unit (2) is provided in multiple ways. The multiple connection units (2) are divided into two groups. Several connection units (2) in the same group are located in the same horizontal plane. One group of connection units (2) is located at the upper end near the fin tube group (1), and the other group of connection units (2) is located at the lower end near the fin tube group (1). Each connection unit (2) is equipped with a preheating component (3).

7. A liquid nitrogen vaporization device according to claim 1 or 6, characterized in that, The connection unit (2) includes a mounting base (21) and multiple connectors (22). The mounting base (21) is disposed between some finned tube groups (1). The multiple connectors (22) are integrally formed on the outside of the mounting base (21) and extend to each finned tube group (1). Each finned tube group (1) is connected to the corresponding connector (22).

8. The liquid nitrogen vaporization device according to claim 7, characterized in that, The mounting base (21) has a mounting hole, and the preheating component (3) is disposed in the mounting hole. The preheating component (3) includes: An electric heating ring (31) is detachably installed in the mounting hole, and a gap is left between the electric heating ring (31) and the mounting base (21); Multiple heat-conducting elements (32) are provided, and the multiple heat-conducting elements (32) are evenly distributed in the gap to enable heat conduction.

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