CN217464939U - Liquid nitrogen preparation system - Google Patents
Liquid nitrogen preparation system Download PDFInfo
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- CN217464939U CN217464939U CN202221396006.1U CN202221396006U CN217464939U CN 217464939 U CN217464939 U CN 217464939U CN 202221396006 U CN202221396006 U CN 202221396006U CN 217464939 U CN217464939 U CN 217464939U
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Abstract
The utility model belongs to the technical field of the liquid nitrogen preparation, especially, relate to a liquid nitrogen preparation system, include from stacked ultra-low temperature unit, adiabatic jar, nitrogen circulation turbocharging system and central control system, central control system links to each other with the control end electricity from stacked ultra-low temperature unit, adiabatic jar, single circulation turbocharging system, is provided with the refrigeration coil pipe in the adiabatic jar, and the import and export of refrigeration coil pipe are connected with first connecting pipe and second connecting pipe respectively, and first connecting pipe and second connecting pipe link to each other with the import and export from stacked ultra-low temperature unit respectively. The utility model discloses need not to adopt high value refrigerating unit such as GM or pulse, the cost is reduced by a wide margin to through nitrogen circulation turbocharging system and adiabatic jar, from overlapping formula ultra-low temperature unit and central control system's cooperation, realized the used in circulation of nitrogen gas-liquid nitrogen-nitrogen gas-liquid nitrogen.
Description
Technical Field
The utility model relates to a liquid nitrogen preparation technical field especially relates to a liquid nitrogen preparation system.
Background
The existing experimental instruments and monitoring instruments need to adopt liquid nitrogen refrigeration to obtain equipment below-180 ℃, most of the equipment are used in a self-cascade refrigeration mode, a temperature area below-180 is difficult to obtain, the application range is limited, the equipment adopting GM for preparing liquid nitrogen has high investment cost, and the equipment directly adopting liquid nitrogen refrigeration is inconvenient to obtain and purchase in certain occasions and has higher cost; in addition, the liquid nitrogen preparation machine on the market at present basically adopts compressed air to prepare high-purity nitrogen firstly, then liquefies the nitrogen into liquid nitrogen through ultralow temperature, directly discharges air after the liquid nitrogen is refrigerated, cannot realize the recycling of the nitrogen, has low utilization rate of the nitrogen, needs to frequently replace equipment accessories during nitrogen preparation, has high operation cost and complex equipment, and therefore, the liquid nitrogen preparation system is provided for solving the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a liquid nitrogen preparation system.
In order to achieve the above object, the utility model provides a following technical scheme: a liquid nitrogen preparation system comprises a self-overlapping type ultralow temperature unit, a heat-insulating tank, a nitrogen circulating pressurization system and a central control system, wherein the central control system is electrically connected with control ends of the self-overlapping type ultralow temperature unit, the heat-insulating tank and the single-circulating pressurization system;
the nitrogen circulating supercharging system comprises a liquid nitrogen refrigerator, a first storage tank, a second storage tank, a nitrogen gas bottle, an insulating pipe, a first air inlet pipe, a pressure regulating valve, a second air inlet pipe, a third connecting pipe, a fourth connecting pipe and a fifth connecting pipe, wherein one end of the liquid nitrogen refrigerator is connected with an outlet of the insulating tank through the insulating pipe, the other end of the liquid nitrogen refrigerator is communicated with the second air inlet pipe through the third connecting pipe, the first air inlet pipe is connected with the insulating tank and the nitrogen gas bottle, the pressure regulating valve is installed on the first air inlet pipe, two ends of the second air inlet pipe are communicated with the first air inlet pipe and are located between the pressure regulating valve and the insulating tank, the third connecting pipe is connected with the second air inlet pipe and the first storage tank, the fourth connecting pipe is connected with the second air inlet pipe and the second storage tank, and the second air inlet pipe is provided with a high-pressure booster pump and a low-pressure booster pump.
In the liquid nitrogen preparation system, the first connecting pipe, the first air inlet pipe, the second air inlet pipe, the third connecting pipe, the fourth connecting pipe, the fifth connecting pipe and the heat insulation pipe are all provided with electromagnetic valves, and each electromagnetic valve is electrically connected with the central control system.
In the above liquid nitrogen preparation system, hand valves are mounted on the first air inlet pipe, the second air inlet pipe, the third connecting pipe, the fourth connecting pipe, the fifth connecting pipe and the high-pressure booster pump.
In the above liquid nitrogen preparation system, pressure gauges are respectively installed on the heat insulation tank, the first storage tank, the second storage tank and the first air inlet pipe, safety valves are respectively installed on the heat insulation tank, the first storage tank and the second storage tank, a liquid level gauge is installed on the heat insulation tank, and the pressure gauges, the safety valves and the liquid level gauge are electrically connected with the central control system.
In the liquid nitrogen preparation system, the heat insulation tank and the liquid nitrogen refrigerator are provided with thermometers, and the thermometers are electrically connected with the central control system.
In the above liquid nitrogen preparation system, the first storage tank and the second storage tank are both provided with an exhaust port.
In the liquid nitrogen preparation system, the number of the electromagnetic valves in the second air inlet pipe is equal to that the electromagnetic valves are separated by the third connecting pipe and the fourth connecting pipe, and the number of the electromagnetic valves is three.
In the above liquid nitrogen preparation system, a check valve is installed on the first air inlet pipe.
In the above-mentioned liquid nitrogen preparation system, the third connecting pipe is located between the high-pressure booster pump and the low-pressure booster pump, and the low-pressure booster pump is located between the fourth connecting pipe and the fifth connecting pipe.
The utility model has the advantages that:
1. the utility model has the advantages that the nitrogen making machine is not needed, and the high-value refrigerating unit such as GM or pulse is not needed, so that the cost is greatly reduced, the nitrogen-liquid nitrogen-liquid nitrogen recycling is realized through the matching of the nitrogen circulation pressurization system, the heat insulation tank, the self-overlapping ultralow temperature unit and the central control system, and the utilization rate of nitrogen is improved;
2. the utility model adopts the nitrogen purchased in the market to replace the compression control to prepare the nitrogen in the operation process, thereby reducing the equipment cost, and the nitrogen is not only convenient to obtain, but also can be supplemented only from time to time because the nitrogen can be recycled, further reducing the cost and improving the economic benefit;
3. the utility model discloses well, low pressure booster pump all adopt oilless formula booster pump, stop the nitrogen gas system because of the liquid nitrogen that oil pollution prepared.
Drawings
FIG. 1 is a schematic diagram of a refrigeration system for preparing liquid nitrogen according to the present invention;
fig. 2 is a schematic system structure diagram of a liquid nitrogen preparation system provided by the present invention.
In the figure: 1. a self-overlapping ultralow temperature unit; 2. an insulated tank; 3. a liquid nitrogen refrigerator; 4. a first storage tank; 5. a second storage tank; 6. a nitrogen gas cylinder; 7. a first connecting pipe; 8. a second connecting pipe; 9. a heat-insulating pipe; 10. a first intake pipe; 11. a pressure regulating valve; 12. a second intake pipe; 13. a third connecting pipe; 14. a fourth connecting pipe; 15. a fifth connecting pipe; 16. a high-pressure booster pump; 17. a low-pressure booster pump; 18. an electromagnetic valve; 19. a hand valve; 20. a pressure gauge; 21. a safety valve; 22. a liquid level meter; 23. a temperature meter; 24. an exhaust port; 25. a check valve; 26. a central control system; 27. and a nitrogen circulation pressurization system.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1 and 2, a liquid nitrogen preparation system comprises a self-stacking type ultralow temperature unit 1, an insulating tank 2, a nitrogen circulation pressurization system 27 and a central control system 26, wherein the central control system 26 is a central controller and is electrically connected with control ends of the self-stacking type ultralow temperature unit 1, the insulating tank 2 and a single circulation pressurization system, a refrigeration coil is arranged in the insulating tank 2, an inlet and an outlet of the refrigeration coil are respectively connected with a first connecting pipe 7 and a second connecting pipe 8, the first connecting pipe 7 and the second connecting pipe 8 are respectively connected with an inlet and an outlet of the self-stacking type ultralow temperature unit 1, thermometers 23 are arranged on the insulating tank 2 and a liquid nitrogen refrigerator 3, the thermometers 23 are electrically connected with the central control system 26, and the thermometers 23 are used for monitoring refrigeration temperature in nitrogen circulation;
the nitrogen circulating pressurization system 27 comprises a liquid nitrogen refrigerator 3, a first storage tank 4, a second storage tank 5, a nitrogen gas bottle 6, an insulated pipe 9, a first air inlet pipe 10, a pressure regulating valve 11, a second air inlet pipe 12, a third connecting pipe 13, a fourth connecting pipe 14 and a fifth connecting pipe 15, one end of the liquid nitrogen refrigerator 3 is connected with the outlet of the insulated tank 2 through the insulated pipe 9, the other end is communicated with the second air inlet pipe 12 through the third connecting pipe 13, the first air inlet pipe 10 is connected with the insulated tank 2 and the nitrogen gas bottle 6, the pressure regulating valve 11 is arranged on the first air inlet pipe 10, two ends of the second air inlet pipe 12 are communicated with the first air inlet pipe 10 and are positioned between the pressure regulating valve 11 and the insulated tank 2, the third connecting pipe 13 is connected with the second air inlet pipe 12 and the first storage tank 4, the fourth connecting pipe 14 is connected with the second air inlet pipe 12 and the second storage tank 5, the second air inlet pipe 12 is provided with a high-pressure booster pump 16 and a low-pressure booster pump 17, the third connecting pipe 13 is located between the high-pressure booster pump 16 and the low-pressure booster pump 17, the low-pressure booster pump 17 is located between the fourth connecting pipe 14 and the fifth connecting pipe 15, the high-pressure booster pump 16 and the low-pressure booster pump 17 are both oilless booster pumps, and the first storage tank 4 and the second storage tank 5 are both provided with exhaust ports 24.
The first connecting pipe 7, the first air inlet pipe 10, the second air inlet pipe 12, the third connecting pipe 13, the fourth connecting pipe 14, the fifth connecting pipe 15 and the heat insulation pipe 9 are all provided with electromagnetic valves 18, and each electromagnetic valve 18 is electrically connected with the central control system 26; adiabatic jar 2, first holding vessel 4, all install manometer 20 on second holding vessel 5 and the first intake pipe 10, adiabatic jar 2, first holding vessel 4, all install relief valve 21 on the second holding vessel 5, install level gauge 22 on the adiabatic jar 2, and manometer 20, relief valve 21 and level gauge 22 link to each other with central control system 26 electrical property, central control system 26 can pass through level gauge 22, manometer 20 acquires information and grasps equipment operation condition, and realize the switching of pipeline through control solenoid 18.
The number of the electromagnetic valves 18 on the second air inlet pipe 12 is 3, the electromagnetic valves are separated by the third connecting pipe 13 and the fourth connecting pipe 14, one side of each of the three electromagnetic valves 18 is provided with a check valve 25, and the check valve 25 is installed on the first air inlet pipe 10 to avoid the backflow of nitrogen in the pipeline.
The use of the valves and the connection to the central control system 26 ensures as safe a use of the preparation system as possible.
The method for preparing the liquid nitrogen by adopting the liquid nitrogen preparation system comprises the following steps:
s1, starting the central control system 26, adding nitrogen into the heat insulation tank 2 by the nitrogen bottle 6, refrigerating the nitrogen by the self-cascade ultralow temperature unit 1 through heat exchange, and refrigerating the high-pressure nitrogen into liquid nitrogen at the refrigerating temperature of lower than-155 ℃;
s2, the liquid nitrogen in the step S1 enters a liquid nitrogen refrigerator 3 through a heat insulation pipe 9, and liquid nitrogen with the temperature of minus 180 ℃ to minus 196 ℃ is obtained through refrigeration;
s3, discharging the gasified liquid nitrogen in the step S2 into a second storage tank 5, boosting the gasified liquid nitrogen to 0.8 +/-0.2 MPa by a low-pressure booster pump 17, then discharging the gasified liquid nitrogen into a first storage tank 4, boosting the gasified liquid nitrogen to more than 4MPa by a high-pressure booster pump 16, storing the gasified liquid nitrogen in a heat insulation pipe 9 in the first storage tank 4, and exchanging heat with the self-overlapping ultralow temperature unit 1 again to achieve the periodic circulation of nitrogen.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (9)
1. A liquid nitrogen preparation system comprises a self-stacking type ultralow temperature unit (1), an insulating tank (2), a nitrogen circulating pressurization system (27) and a central control system (26), and is characterized in that the central control system (26) is electrically connected with control ends of the self-stacking type ultralow temperature unit (1), the insulating tank (2) and the single circulating pressurization system, a refrigeration coil is arranged in the insulating tank (2), an inlet and an outlet of the refrigeration coil are respectively connected with a first connecting pipe (7) and a second connecting pipe (8), and the first connecting pipe (7) and the second connecting pipe (8) are respectively connected with an inlet and an outlet of the self-stacking type ultralow temperature unit (1);
the nitrogen circulating pressurization system (27) comprises a liquid nitrogen refrigerator (3), a first storage tank (4), a second storage tank (5), a nitrogen gas bottle (6), a heat insulation pipe (9), a first air inlet pipe (10), a pressure regulating valve (11), a second air inlet pipe (12), a third connecting pipe (13), a fourth connecting pipe (14) and a fifth connecting pipe (15), one end of the liquid nitrogen refrigerator (3) is connected with an outlet of the heat insulation tank (2) through the heat insulation pipe (9), the other end of the liquid nitrogen refrigerator is communicated with the second air inlet pipe (12) through the third connecting pipe (13), the first air inlet pipe (10) is connected with the heat insulation tank (2) and the nitrogen gas bottle (6), the pressure regulating valve (11) is installed on the first air inlet pipe (10), two ends of the second air inlet pipe (12) are communicated with the first air inlet pipe (10) and are positioned between the pressure regulating valve (11) and the heat insulation tank (2), second intake pipe (12) and first holding vessel (4) are connected in third connecting pipe (13), second intake pipe (12) and second holding vessel (5) are connected in fourth connecting pipe (14), install high pressure booster pump (16) and low pressure booster pump (17) on second intake pipe (12) connection.
2. The liquid nitrogen preparation system according to claim 1, wherein the first connecting pipe (7), the first air inlet pipe (10), the second air inlet pipe (12), the third connecting pipe (13), the fourth connecting pipe (14), the fifth connecting pipe (15) and the heat insulation pipe (9) are respectively provided with an electromagnetic valve (18), and each electromagnetic valve (18) is electrically connected with the central control system (26).
3. The liquid nitrogen preparation system according to claim 1, wherein hand valves (19) are mounted on the first gas inlet pipe (10), the second gas inlet pipe (12), the third connecting pipe (13), the fourth connecting pipe (14), the fifth connecting pipe (15) and the high-pressure booster pump (16).
4. The liquid nitrogen preparation system according to claim 1, wherein the heat-insulating tank (2), the first storage tank (4), the second storage tank (5) and the first air inlet pipe (10) are all provided with a pressure gauge (20), the heat-insulating tank (2), the first storage tank (4) and the second storage tank (5) are all provided with a safety valve (21), the heat-insulating tank (2) is provided with a liquid level gauge (22), and the pressure gauge (20), the safety valve (21) and the liquid level gauge (22) are electrically connected with a central control system (26).
5. A liquid nitrogen preparation system according to claim 1, wherein a temperature meter (23) is installed on the heat-insulated tank (2) and the liquid nitrogen refrigerator (3), and the temperature meter (23) is electrically connected to the central control system (26).
6. The liquid nitrogen preparation system according to claim 1, wherein the first storage tank (4) and the second storage tank (5) are provided with exhaust ports (24).
7. A liquid nitrogen preparation system according to claim 2, characterized in that the number of solenoid valves (18) in the second inlet pipe (12) is 3, and the solenoid valves are separated by a third connecting pipe (13) and a fourth connecting pipe (14), and one side of each of the three solenoid valves (18) is provided with a check valve (25).
8. A liquid nitrogen preparation system according to claim 1, wherein a check valve (25) is mounted on said first inlet pipe (10).
9. A liquid nitrogen production system as set forth in claim 1, wherein the third connection pipe (13) is located between the high-pressure booster pump (16) and the low-pressure booster pump (17), and the low-pressure booster pump (17) is located between the fourth connection pipe (14) and the fifth connection pipe (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221396006.1U CN217464939U (en) | 2022-06-07 | 2022-06-07 | Liquid nitrogen preparation system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221396006.1U CN217464939U (en) | 2022-06-07 | 2022-06-07 | Liquid nitrogen preparation system |
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| CN217464939U true CN217464939U (en) | 2022-09-20 |
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| CN202221396006.1U Active CN217464939U (en) | 2022-06-07 | 2022-06-07 | Liquid nitrogen preparation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935242A (en) * | 2022-06-07 | 2022-08-23 | 苏州蒂珀克制冷科技有限公司 | Liquid nitrogen preparation system and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935242A (en) * | 2022-06-07 | 2022-08-23 | 苏州蒂珀克制冷科技有限公司 | Liquid nitrogen preparation system and preparation method thereof |
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