Liquid nitrogen tank gasification cold energy recovery device

Abstract

The utility model discloses a kind of liquid nitrogen tank gasification cold energy recovery devices, including nitrogen storage tank, the supplementary pipe is communicated in the upper side of nitrogen storage tank front end, the control valve pipe is communicated in the lower side of nitrogen storage tank right end, the distribution pipe is communicated in the right end of control valve pipe, the recovery tank is communicated in the right end of distribution pipe, the gas guide pipe is communicated in the right end of recovery tank, the lower end outside of nitrogen storage tank and recovery tank is connected with multiple support legs, the inside wall center of recovery tank lower end is connected with partition, and recovery tank is separated into two parts by partition, first energy storage cavity is arranged in the inside of recovery tank left end, second energy storage cavity is arranged in the inside of recovery tank right end, the utility model uses two-stage cold energy recovery design, recovery tank is divided into first energy storage cavity and second energy storage cavity by partition, liquid nitrogen is preliminary heat exchange temperature rise in first energy storage cavity first, then enters second energy storage cavity complete gasification, realize the stepwise recovery of cold energy, improve energy utilization efficiency.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen vaporization cold energy recovery, and in particular to a liquid nitrogen tank vaporization cold energy recovery device. Background Technology

[0002] In traditional liquid nitrogen storage and use, the large amount of cold energy generated during liquid nitrogen vaporization is usually directly released into the environment, resulting in energy waste. Most existing liquid nitrogen vaporization devices use a single-stage heat exchange method, which cannot achieve cascade utilization of cold energy. The limited heat exchange area leads to insufficient heat exchange and low efficiency.

[0003] To address the aforementioned issues, this patent proposes a liquid nitrogen tank vaporization cold energy recovery device capable of multi-stage, stepped recovery, thereby solving the aforementioned technical challenges. Utility Model Content

[0004] The main purpose of this invention is to propose a liquid nitrogen tank vaporization cold energy recovery device, which aims to solve the problems of insufficient heat exchange and low efficiency in traditional liquid nitrogen tank vaporization cold energy recovery devices that use a single-stage heat exchange method.

[0005] To address the aforementioned problems, this utility model proposes a liquid nitrogen tank vaporization cold energy recovery device, comprising a nitrogen storage tank, a replenishment pipe connected to the upper front side of the nitrogen storage tank, a control valve pipe connected to the lower right side of the nitrogen storage tank, a distribution pipe connected to the right side of the control valve pipe, a recovery box connected to the right side of the distribution pipe, a gas guide pipe connected to the right side of the recovery box, and multiple support legs connected to the lower outer sides of both the nitrogen storage tank and the recovery box.

[0006] Preferably, a partition plate is connected to the center of the lower inner wall of the recycling bin, and the inside of the recycling bin is divided into two parts by the partition plate.

[0007] Preferably, a first energy storage chamber is provided inside the left end of the recycling bin, and a second energy storage chamber is provided inside the right end of the recycling bin.

[0008] Preferably, the first energy storage cavity and the second energy storage cavity are connected at their upper ends and are located on the left and right sides of the partition plate, respectively.

[0009] Preferably, a water inlet pipe is connected to the lower left side of the recycling bin, and a water outlet pipe is connected to the lower right side of the recycling bin.

[0010] Preferably, the right end of the distribution pipe is connected to multiple heat-absorbing bends, and the multiple heat-absorbing bends are evenly distributed in the first energy storage cavity.

[0011] Preferably, the right ends of the plurality of heat-absorbing bends are all connected to vaporization chambers, and the plurality of vaporization chambers are evenly distributed in the second energy storage cavity.

[0012] Preferably, the right end of each of the gasification chambers is connected to a gas collection chamber, and the gas collection chamber is connected between the recovery box and the gas guide pipe.

[0013] Beneficial effects:

[0014] 1. This utility model adopts a two-stage cold energy recovery design. The recovery box is divided into a first energy storage chamber and a second energy storage chamber by a partition plate. Liquid nitrogen first undergoes preliminary heat exchange and heating in the first energy storage chamber, and then enters the second energy storage chamber to be completely vaporized, realizing the step-by-step recovery of cold energy and improving energy utilization efficiency.

[0015] 2. The present invention connects multiple curved heat-absorbing bends in the distribution pipe, extending the flow path of liquid nitrogen and enabling it to fully exchange heat with the energy storage water in the first energy storage chamber in a non-contact manner. This not only avoids premature vaporization of liquid nitrogen that could cause pipe blockage, but also improves the cold energy recovery rate.

[0016] 3. The liquid nitrogen of this utility model is vaporized through an independent vaporization chamber. The vaporization chamber and the energy storage water in the second energy storage chamber exchange heat indirectly to ensure that nitrogen does not mix into the water. At the same time, the vaporization chamber is opened with a heat exchange tank to increase the heat exchange area and improve the cold energy recovery efficiency during the vaporization stage.

[0017] 4. The energy storage water of this utility model is injected into the first energy storage chamber through the water inlet pipe, absorbs cold energy and flows into the second energy storage chamber for further heat exchange, and is finally discharged to the workshop for cooling through the water outlet pipe, forming a closed-loop cold energy utilization process to realize the storage and reuse of cold energy.

[0018] 5. In this invention, the liquid nitrogen is preheated in the heat-absorbing bend to avoid freezing and clogging of the pipe due to violent phase change when it enters the vaporization chamber directly. At the same time, the vaporization chamber centrally processes the vaporization process, ensuring that the nitrogen is smoothly discharged to the gas collection chamber, thus improving the stability of the system. Attached Figure Description

[0019] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the liquid nitrogen tank vaporization cold energy recovery device of this utility model;

[0021] Figure 2 This is a three-dimensional cross-sectional view of the recycling bin of this utility model;

[0022] Figure 3 This is a front view cross-sectional structural diagram of the recycling bin of this utility model;

[0023] Figure 4 This is a schematic diagram of the connection structure of the recycling bin of this utility model;

[0024] Figure 5 This is a schematic diagram of the heat-absorbing bent tube connection structure of this utility model.

[0025] The annotations in the attached figures are explained as follows:

[0026] 1. Nitrogen storage tank; 2. Replenishment pipe; 3. Control valve pipe; 4. Distribution pipe; 5. Recovery box; 6. Gas guide pipe; 7. Support leg; 8. Divider plate; 9. First energy storage chamber; 10. Second energy storage chamber; 11. Water inlet pipe; 12. Water outlet pipe; 13. Heat absorption bend pipe; 14. Gasification chamber; 15. Gas collection chamber. Detailed Implementation

[0027] 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.

[0028] To achieve the above-mentioned utility model objectives, such as Figures 1-5 As shown, this utility model provides a liquid nitrogen tank vaporization cold energy recovery device, including a nitrogen storage tank 1, a replenishment pipe 2 connected to the upper front end of the nitrogen storage tank 1, a control valve pipe 3 connected to the lower right end of the nitrogen storage tank 1, a distribution pipe 4 connected to the right end of the control valve pipe 3, a recovery box 5 connected to the right end of the distribution pipe 4, and a gas guide pipe 6 connected to the right end of the recovery box 5. Multiple support legs 7 are connected to the lower outer sides of both the nitrogen storage tank 1 and the recovery box 5. In the process of liquid nitrogen vaporization cold energy recovery, the nitrogen storage tank 1 is replenished with liquid nitrogen through the replenishment pipe 2, and the liquid nitrogen is introduced into the distribution pipe 4 through the control valve pipe 3. Then, the liquid nitrogen is introduced into the recovery box 5 through the distribution pipe 4 for vaporization and heat energy exchange. The vaporized nitrogen is then discharged through the gas guide pipe 6 for industrial production. At the same time, the cold energy generated by the vaporization of liquid nitrogen is stored and transferred through heat energy exchange, and then transferred to the production workshop for cooling.

[0029] Preferably, a partition plate 8 is connected to the center of the lower inner wall of the recovery box 5, and the interior of the recovery box 5 is divided into two parts by the partition plate 8. A first energy storage chamber 9 is provided inside the left end of the recovery box 5, and a second energy storage chamber 10 is provided inside the right end of the recovery box 5. The upper ends of the first energy storage chamber 9 and the second energy storage chamber 10 are connected and are located on the left and right sides of the partition plate 8, respectively. A water inlet pipe 11 is connected to the lower side of the left end of the recovery box 5, and a water outlet pipe 12 is connected to the lower side of the right end of the recovery box 5. During the vaporization and heat exchange of liquid nitrogen, liquid nitrogen first enters the interior of the left end of the recovery box 5 through the distribution pipe 4, and simultaneously stores energy. Water is introduced into the first energy storage chamber 9 inside the left end of the recovery tank 5 through the water inlet pipe 11, and undergoes a first heat exchange with the liquid nitrogen entering the first energy storage chamber 9. Then, the liquid nitrogen and the stored water simultaneously enter the second energy storage chamber 10 through the channel between the upper end of the partition plate 8 and the inner wall of the recovery tank 5. At this time, the liquid nitrogen is vaporized in the second energy storage chamber 10 and undergoes a second heat exchange with the stored water. After the heat exchange is completed, the vaporized nitrogen is discharged through the gas guide pipe 6 for industrial production, and the stored water is discharged through the water outlet pipe 12 to enter the production workshop for workshop cooling.

[0030] Preferably, the right end of the distribution pipe 4 is connected to multiple heat-absorbing bends 13, which are evenly distributed front-to-back inside the first energy storage chamber 9. The right ends of each heat-absorbing bend 13 are connected to vaporization chambers 14, which are evenly distributed front-to-back inside the second energy storage chamber 10. The right ends of each vaporization chamber 14 are connected to a gas collecting chamber 15, which is connected between the recovery box 5 and the gas guide pipe 6. During the process of liquid nitrogen entering and exiting the recovery box 5, the liquid nitrogen is distributed through the distribution pipe 4 into the multiple heat-absorbing bends 13 and passes through multiple heat-absorbing bends 13. The bent pipe 13 performs the first heat exchange, then passes through multiple vaporization chambers 14 for vaporization, and performs the second heat exchange. Since the multiple heat-absorbing bent pipes 13 are not connected to the inside of the first energy storage chamber 9, and the multiple vaporization chambers 14 are not connected to the inside of the second energy storage chamber 10, liquid nitrogen can flow through the multiple heat-absorbing bent pipes 13 and multiple vaporization chambers 14 through the inside of the first energy storage chamber 9 and the second energy storage chamber 10, so that it can perform heat exchange with the energy storage water inside the first energy storage chamber 9 and the second energy storage chamber 10, and will not leak into the energy storage water inside the first energy storage chamber 9 and the second energy storage chamber 10.

[0031] When liquid nitrogen flows through the first energy storage chamber 9 through multiple heat-absorbing bends 13, the liquid nitrogen can be heated by the first heat exchange with the energy storage water and store some of the cold energy in the energy storage water. This can not only recover some of the cold energy of the liquid nitrogen, but also prevent the liquid nitrogen from freezing during the subsequent vaporization process, which would block the connection between the heat-absorbing bends 13 and the vaporization chamber 14.

[0032] In addition, multiple heat-absorbing bends 13 are curved and pass through the first energy storage cavity 9, which can increase the path length of liquid nitrogen flowing through the first energy storage cavity 9, allowing the liquid nitrogen to fully exchange heat with the energy storage water for the first time. Multiple heat exchange slots are opened in the middle of the multiple vaporization chambers 14, allowing the liquid nitrogen to fully exchange heat with the energy storage water for the second time during the vaporization process, thereby improving the heat exchange efficiency. After the liquid nitrogen is vaporized, it can be collected through the gas collection chamber 15 and introduced into the gas guide pipe 6 for export.

[0033] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A liquid nitrogen tank gasification cold energy recovery device, characterized in that, Includes a nitrogen storage tank (1), with a replenishment pipe (2) connected to the upper front end of the nitrogen storage tank (1), a control valve pipe (3) connected to the lower right end of the nitrogen storage tank (1), a distribution pipe (4) connected to the right end of the control valve pipe (3), a recovery box (5) connected to the right end of the distribution pipe (4), a gas guide pipe (6) connected to the right end of the recovery box (5), and multiple support legs (7) connected to the lower outer sides of both the nitrogen storage tank (1) and the recovery box (5). The recycling bin (5) is connected to a partition plate (8) at the center of the lower inner wall, and the inside of the recycling bin (5) is divided into two parts by the partition plate (8); The recycling bin (5) has a first energy storage chamber (9) inside its left end and a second energy storage chamber (10) inside its right end.

2. The liquid nitrogen tank gasification cold energy recovery device according to claim 1, characterized in that, The first energy storage cavity (9) and the second energy storage cavity (10) are connected at their upper ends and are located on the left and right sides of the partition plate (8), respectively.

3. The liquid nitrogen tank gasification cold energy recovery device according to claim 2, characterized in that, The lower left side of the recycling bin (5) is connected to a water inlet pipe (11), and the lower right side of the recycling bin (5) is connected to a water outlet pipe (12).

4. The liquid nitrogen tank gasification cold energy recovery device according to claim 3, characterized in that, The right end of the distribution pipe (4) is connected to multiple heat-absorbing bends (13), and the multiple heat-absorbing bends (13) are evenly distributed in the front and back inside the first energy storage cavity (9).

5. The liquid nitrogen tank gasification cold energy recovery device according to claim 4, characterized in that, The right ends of the multiple heat-absorbing bends (13) are all connected to vaporization chambers (14), and the multiple vaporization chambers (14) are evenly distributed in the second energy storage cavity (10).

6. The liquid nitrogen tank gasification cold energy recovery device according to claim 5, characterized in that, The right end of each of the gasification chambers (14) is connected to a gas collection chamber (15), and the gas collection chamber (15) is connected between the recovery box (5) and the gas guide pipe (6).

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