Liquid nitrogen gasification cold energy recovery system
By designing a liquid nitrogen vaporization cooling energy recovery system and using ethylene glycol solution as the heat exchange medium, the heat complementarity between liquid nitrogen vaporization and water cooling is achieved, solving the problems of high energy consumption in liquid nitrogen vaporization and refrigeration, and reducing energy consumption and costs in industrial production.
Patent Information
- Application Number
- CN202520113173.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-01-16
Smart Images
Figure CN223609887U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to industrial liquid nitrogen gasification field especially relates to a liquid nitrogen gasification cold quantity recovery system. BACKGROUND
[0002] At present in the industrial production manufacturing, nitrogen is a kind of raw material commonly used, but the transport process of nitrogen is usually bottled in the form of liquid nitrogen, so when using, it also needs to provide heat through liquid nitrogen gasification device to use after gasification, and this process needs a lot of energy;At the same time, in the industrial production process, the low-temperature ice water is also very frequent, and it is usually used after the normal temperature water is cooled to low-temperature state by refrigerating machine, and the refrigerating machine also consumes a lot of energy. SUMMARY
[0003] In order to overcome the above problems, the utility model provides a kind of liquid nitrogen gasification cold quantity recovery system, and the technical scheme that the utility model solves its technical problems is as follows:
[0004] A kind of liquid nitrogen gasification cold quantity recovery system, including liquid nitrogen storage tank communicated with three-way control valve, three-way control valve one end is communicated to liquid nitrogen gasification device, the other end of three-way control valve is communicated to liquid nitrogen gasification device by first heat exchange pipeline, first heat exchange pipeline passes through from heat exchange tank inside;It also includes first water tank, first water tank is communicated to second water tank by second heat exchange pipeline, water pump is provided on second heat exchange pipeline, to drive the water in first water tank flow into second water tank by second heat exchange pipeline, second heat exchange pipeline also passes through from heat exchange tank inside;Heat exchange tank is equipped with liquid heat exchange medium, to absorb the heat of second heat exchange pipeline pipe section in heat exchange tank, and provide heat for the pipe section of first heat exchange pipeline in heat exchange tank.
[0005] Further, the liquid heat exchange medium is glycol solution.
[0006] Further, the diameter of the pipe section of first heat exchange pipeline in heat exchange tank is greater than the diameter of the pipe section not in heat exchange tank, and the diameter of the pipe section of second heat exchange pipeline in heat exchange tank is greater than the diameter of the pipe section not in heat exchange tank, to increase the contact area of first heat exchange pipeline and second heat exchange pipeline with liquid heat exchange medium.
[0007] Further, the pipe section of first heat exchange pipeline in heat exchange tank is a plurality of parallel pipelines, and the pipe section of second heat exchange pipeline in heat exchange tank is a plurality of parallel pipelines, to increase the contact area of first heat exchange pipeline and second heat exchange pipeline with liquid heat exchange medium.
[0008] Further, the pipeline of the pipe section of first heat exchange pipeline in heat exchange tank and the pipeline of the pipe section of second heat exchange pipeline in heat exchange tank are cross arranged, to improve the heat exchange efficiency between first heat exchange pipeline and second heat exchange pipeline.
[0009] Further, the heat exchange tank is a non-closed normal pressure structure.
[0010] Further, the second heat exchange pipeline is provided with a temperature sensor and a flow controller, the temperature sensor is electrically connected with the flow controller through a central controller, and the temperature sensor is electrically connected with the three-way control valve through the central controller.
[0011] The utility model discloses beneficial effect has:
[0012] The system includes liquid nitrogen storage tank communicated with three-way control valve, one end of three-way control valve is communicated to liquid nitrogen gasification device, and the other end of three-way control valve is communicated to liquid nitrogen gasification device through first heat exchange pipeline, and first heat exchange pipeline passes through from heat exchange tank; It also includes first water tank, and first water tank is communicated to second water tank through second heat exchange pipeline, and water pump is arranged on second heat exchange pipeline to drive the water in first water tank to flow into second water tank through second heat exchange pipeline, and second heat exchange pipeline also passes through from heat exchange tank; Heat exchange tank is loaded with liquid heat exchange medium;The system passes through the heat exchange tank, and the heat exchange medium in heat exchange tank provides the heat released by the cooling of water for liquid nitrogen absorption to gasification, so that the refrigerating machine can be cancelled, and the energy consumption of liquid nitrogen gasification device can be reduced, and two things are achieved at one stroke, realize liquid nitrogen gasification and the ice water prepared simultaneously, reduce energy consumption. BRIEF DESCRIPTION OF DRAWINGS
[0013] The utility model will be further described in connection with the drawings and specific embodiments, wherein:
[0014] Figure 1 It is the simulation diagram of liquid nitrogen gasification cold energy recovery system.
[0015] Figure number mark:
[0016] 100, liquid nitrogen storage tank;101, three-way control valve;102, liquid nitrogen gasification device;103, first heat exchange pipeline;104, heat exchange tank;105, first water tank;106, second heat exchange pipeline;107, second water tank;108, water pump;109, temperature sensor;110, flow controller. DETAILED DESCRIPTION
[0017] In order to better understand the purpose, structure and function of the utility model, the specific embodiment of the utility model "a liquid nitrogen gasification cold energy recovery system" is further described in detail in connection with the drawings.
[0018] Reference Figure 1In the embodiment, the liquid nitrogen gasification cold energy recovery system comprises a liquid nitrogen storage tank 100 communicated with a three-way control valve 101, one end of the three-way control valve 101 is communicated to a liquid nitrogen gasification device 102, the other end of the three-way control valve 101 is communicated to the liquid nitrogen gasification device 102 through a first heat exchange pipeline 103, and the first heat exchange pipeline 103 passes through a heat exchange tank 104; the system further comprises a first water tank 105 storing normal temperature water, the first water tank 105 is communicated to a second water tank 107 through a second heat exchange pipeline 106, a water pump 108 is arranged on the second heat exchange pipeline 106 to drive the water in the first water tank 105 to flow into the second water tank 107 after the water becomes low-temperature ice water through the second heat exchange pipeline 106, and the second heat exchange pipeline 106 also passes through the heat exchange tank 104; the heat exchange tank 104 is provided with a liquid heat exchange medium to absorb the heat of the pipe section of the second heat exchange pipeline 106 in the heat exchange tank 104 and provide the heat to the pipe section of the first heat exchange pipeline 103 in the heat exchange tank 104 for absorption; the system provides the heat released by the normal temperature water after being cooled by the heat exchange medium in the heat exchange tank 104 to the liquid nitrogen to make the liquid nitrogen gasify, achieves heat complementation, fully utilizes the physical properties of liquid nitrogen gasification endothermic and water cooling exothermic, does not need to use a refrigerating machine to cool the normal temperature water into ice water, can reduce the energy consumption of the liquid nitrogen gasification device 102 at one stroke, and has effects on reducing the energy consumption of industrial production and manufacturing and reducing production cost.
[0019] Preferably, in the embodiment, the heat exchange medium is a glycol solution. The boiling point of glycol is relatively high, and the boiling point of glycol is 197.3°C under normal pressure. This property makes it remain in liquid state under a higher temperature environment and does not easily vaporize like some low-boiling-point mediums. Meanwhile, glycol has a low freezing point, and the freezing point of the water solution of glycol can be adjusted according to the concentration of glycol. When mixed with water, the freezing point of the solution can be significantly reduced. Moreover, glycol has good thermal stability in a wide temperature range, and it does not easily decompose or deteriorate under normal heat exchange operating temperature, and can work stably for a long time. In addition, the chemical property of glycol is relatively stable, and it does not easily react with most common metals and non-metal materials, which makes it can be used in heat exchange equipment made of various materials without causing corrosion or damage to the equipment.
[0020] Meanwhile, it should be noted that the heat exchange tank 104 in the embodiment is a non-closed normal pressure structure, so even if the liquid nitrogen leaks due to pipeline failure and damage, the ice water system will not be directly damaged, achieving the design function of intrinsic safety.
[0021] More specifically, in the embodiment, the diameter of the pipe section of the first heat exchange pipe 103 located in the heat exchange tank 104 is larger than that of the pipe section not located in the heat exchange tank 104, and the diameter of the pipe section of the second heat exchange pipe 106 located in the heat exchange tank 104 is larger than that of the pipe section not located in the heat exchange tank 104, so that the contact area of the first heat exchange pipe 103 and the second heat exchange pipe 106 with the liquid heat exchange medium is increased, and the heat exchange efficiency is improved.
[0022] Further, in other embodiments, the pipe section of the first heat exchange pipe 103 located in the heat exchange tank 104 is a plurality of parallel pipes, and the pipe section of the second heat exchange pipe 106 located in the heat exchange tank 104 is also a plurality of parallel pipes, so that the contact area of the first heat exchange pipe 103 and the second heat exchange pipe 106 with the liquid heat exchange medium is increased, and the heat exchange efficiency is improved; and the pipes of the pipe section of the first heat exchange pipe 103 located in the heat exchange tank 104 and the pipes of the pipe section of the second heat exchange pipe 106 located in the heat exchange tank 104 can be arranged in a cross manner to further improve the heat exchange efficiency between the first heat exchange pipe 103 and the second heat exchange pipe 106.
[0023] More specifically, in the embodiment, the second heat exchange pipe 106 is provided with a temperature sensor 109 and a flow controller 110, the temperature sensor 109 is electrically connected to the flow controller 110 through a central controller, and the temperature sensor 109 is electrically connected to the three-way control valve 101 through the central controller; by setting a corresponding program, the central controller can adjust the water flow in the second heat exchange pipe 106 according to the reading of the temperature sensor 109, and can control the proportion of the liquid nitrogen flowing directly to the liquid nitrogen gasification device 102 and the liquid nitrogen flowing to the liquid nitrogen gasification device 102 after passing through the first heat exchange pipe 103, and then the heat exchange rate in the heat exchange tank 104, so as to control the water temperature of the ice water flowing into the second water tank 107.
[0024] It can be understood that the utility model is described through some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. In addition, under the guidance of the utility model, these features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the utility model. Therefore, the utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the scope protected by the utility model.
[0025] In the description of the utility model, it is necessary to explain, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation based on the orientation or position relation shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore it cannot be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
Claims
1. A liquid nitrogen gasification cold energy recovery system, characterized by, The application relates to a liquid nitrogen storage tank (100) connected with a three-way control valve (101), one end of the three-way control valve (101) being connected to a liquid nitrogen gasification device (102), the other end of the three-way control valve (101) being connected to the liquid nitrogen gasification device (102) through a first heat exchange pipeline (103), the first heat exchange pipeline (103) passing through a heat exchange tank (104); a first water tank (105) is connected to a second water tank (107) through a second heat exchange pipeline (106), a water pump (108) being arranged on the second heat exchange pipeline (106) to drive water in the first water tank (105) to flow into the second water tank (107) through the second heat exchange pipeline (106), the second heat exchange pipeline (106) also passing through the heat exchange tank (104); the heat exchange tank (104) is filled with a liquid heat exchange medium to absorb heat of a pipeline section of the second heat exchange pipeline (106) located in the heat exchange tank (104) and provide heat for a pipeline section of the first heat exchange pipeline (103) located in the heat exchange tank (104).
2. The liquid nitrogen gasification cold energy recovery system of claim 1, wherein, The liquid heat exchange medium is a glycol solution.
3. The liquid nitrogen gasification cold energy recovery system of claim 2, wherein, The diameter of the pipeline section of the first heat exchange pipeline (103) located in the heat exchange tank (104) is greater than that of the pipeline section not located in the heat exchange tank (104), and the diameter of the pipeline section of the second heat exchange pipeline (106) located in the heat exchange tank (104) is greater than that of the pipeline section not located in the heat exchange tank (104), so that the contact area of the first heat exchange pipeline (103) and the second heat exchange pipeline (106) with the liquid heat exchange medium is increased.
4. The system of claim 2, wherein, The pipeline section of the first heat exchange pipeline (103) located in the heat exchange tank (104) is a plurality of parallel pipelines, and the pipeline section of the second heat exchange pipeline (106) located in the heat exchange tank (104) is a plurality of parallel pipelines, so that the contact area of the first heat exchange pipeline (103) and the second heat exchange pipeline (106) with the liquid heat exchange medium is increased.
5. The system of claim 4, wherein, The pipelines of the pipeline section of the first heat exchange pipeline (103) located in the heat exchange tank (104) and the pipeline section of the second heat exchange pipeline (106) located in the heat exchange tank (104) are arranged in a crisscross mode, so that the heat exchange efficiency between the first heat exchange pipeline (103) and the second heat exchange pipeline (106) is improved.
6. A liquid nitrogen gasification cold energy recovery system according to any one of claims 1-5, characterized in that, The heat exchange tank (104) is a non-closed normal-pressure structure.
7. The system of claim 6, wherein, A temperature sensor (109) and a flow controller (110) are arranged on the second heat exchange pipeline (106), the temperature sensor (109) being electrically connected to the flow controller (110) through a central controller, and the temperature sensor (109) being electrically connected to the three-way control valve (101) through the central controller.