Efficient nitrogen liquefaction and collection equipment for air separation
By using the design of a circulation pump and a spray pipe in the nitrogen liquefaction and collection equipment, the recycling of adsorbent is achieved, and the problem of adsorbent affecting the temperature of the separation tower is solved, and the separation efficiency of nitrogen is improved.
Patent Information
- Application Number
- CN202421613857.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-09
AI Technical Summary
When the existing nitrogen liquefaction and collection equipment separates nitrogen, the sprayed adsorbent will affect the temperature inside the separation tower, resulting in a low nitrogen separation efficiency.
A highly efficient nitrogen liquefaction and collection equipment for air separation is designed. By installing a circulation pump and a spray pipe in the separation tower, the adsorbent is recycled and the low temperature environment in the separation tower is maintained.
It effectively improves the separation efficiency of nitrogen, avoids the problem of adsorbent affecting the temperature of the separation tower, and improves the performance of the overall equipment.
Smart Images
Figure CN222993334U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nitrogen separation, in particular to an efficient nitrogen liquefaction and collection device for air separation. Background Technique
[0002] An efficient nitrogen liquefaction and collection device usually includes the following components: a nitrogen liquefier, a compressor, a condenser, a liquid storage tank, an evaporator, and a collection container. Nitrogen is first pressurized by a compressor and then cooled to the liquefaction temperature through a condenser. The condensed liquid nitrogen is stored in the liquid storage tank and then released into the collection container through the evaporator. In this way, the liquefaction and collection process of nitrogen is completed and can be used for various laboratory and industrial applications.
[0003] Efficient nitrogen liquefaction and collection is also applicable to mixed gases. Generally, nitrogen in the mixed gas is separated by spraying in a separation tower. At this time, the separated nitrogen will be at a higher position in the separation tower. When collecting nitrogen, it is liquefied by cooling to achieve the collection of nitrogen. However, when the existing efficient nitrogen liquefaction and collection separates nitrogen, an adsorbent is generally sprayed inside the separation tower. When spraying, new adsorbent will be sprayed into the separation tower. At this time, the thermostatic adsorbent sprayed into the separation tower will affect the temperature inside the separation tower, and nitrogen has a better separation effect at low temperature, resulting in a lower separation efficiency of the existing efficient nitrogen liquefaction and collection device. Summary of the Utility Model
[0004] The utility model provides an efficient nitrogen liquefaction and collection device for air separation, which has the advantage of high efficiency, to solve the problem that when the existing efficient nitrogen liquefaction and collection separates nitrogen, an adsorbent is generally sprayed inside the separation tower. When spraying, new adsorbent will be sprayed into the separation tower. At this time, the thermostatic adsorbent sprayed into the separation tower will affect the temperature inside the separation tower, and nitrogen has a better separation effect at low temperature, resulting in a lower separation efficiency of the existing efficient nitrogen liquefaction and collection device.
[0005] To achieve the purpose of high efficiency, the utility model provides the following technical scheme: an efficient nitrogen liquefaction and collection device for air separation, including a separation tower and a discharge pipe. The discharge pipe is installed on the top surface of the separation tower. A collection hole is opened on the bottom surface of the inner wall of the separation tower. A drain pipe is installed on the outer surface of the separation tower. A circulation pipe is installed on the inner wall of the collection hole. A circulation pump is installed on the outer surface of the separation tower. An expansion valve is installed on the bottom surface of the discharge pipe. A spraying component is installed on the inner wall of the separation tower. A cooling component is installed on the outer surface of the separation tower.
[0006] As a preferred technical solution of the present utility model, the discharge pipe is internally communicated with the separation tower, the drain pipe is internally communicated with the separation tower, one end of the circulation pipe is connected to the output end of the circulation pump, there are two discharge pipes, and the two discharge pipes are connected to each other through an expansion valve.
[0007] As a preferred technical solution of the present utility model, the spraying assembly includes a mesh plate, a spray pipe is installed on the inner wall of the mesh plate, a spray plate is installed on the top surface of the spray pipe, spray holes are opened on the bottom surface of the spray plate, a reciprocating pipe is installed on the outer surface of the spray pipe, and the mesh plate is installed on the inner wall of the separation tower.
[0008] As a preferred technical solution of the present utility model, there are two mesh plates, the two mesh plates are equidistantly distributed on the inner wall of the separation tower, the outer surface of the spray pipe is fixedly connected to the inner walls of the two mesh plates, and one end of the spray pipe extends from the outer surface of the separation tower to its interior.
[0009] As a preferred technical solution of the present utility model, the spray pipe is internally communicated with the spray plate, the spray holes are equidistantly distributed on the bottom surface of the spray plate, one end of the reciprocating pipe is internally communicated with the spray pipe, and the other end of the reciprocating pipe is connected to the output end of the circulation pump.
[0010] As a preferred technical solution of the present utility model, the cooling assembly includes a cooling copper pipe, a condensation heat exchanger is installed on the outer surface of the separation tower, a refrigerator is installed on the outer surface of the separation tower, and the cooling copper pipe is installed on the outer surface of the discharge pipe.
[0011] As a preferred technical solution of the present utility model, the condensation heat exchanger is internally communicated with the cooling copper pipe through a pipeline, the inner wall of the cooling copper pipe is fixedly connected to the outer surface of the discharge pipe, and the output end of the refrigerator is internally communicated with the separation tower.
[0012] Compared with the prior art, the present utility model provides an efficient nitrogen liquefaction and collection device for air separation, which has the following beneficial effects:
[0013] For the efficient nitrogen liquefaction and collection device for air separation, the adsorbent flowing into the circulation pipe will be input into the inner wall of the spray pipe again by the started circulation pump and then sprayed out by the spray pipe, realizing the circulation of the adsorbent and maintaining the low temperature in the separation tower, thereby making up for the defect that in the prior art, when the nitrogen liquefaction and collection device separates nitrogen, the injected constant-temperature adsorbent will affect the temperature inside the separation tower, resulting in a slow separation speed of nitrogen at a constant temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the external structure of the present utility model;
[0015] Figure 2 This is a schematic diagram of the external structure of another angle of the present utility model;
[0016] Figure 3 This is a schematic diagram of the internal structure of the present utility model;
[0017] Figure 4 This is a schematic diagram of the internal structure of another angle of the present utility model;
[0018] Figure 5 is the enlarged schematic diagram of the structure of part A provided by the present utility model Figure 4 in
[0019] In the figure: 1, separation tower; 2, discharge pipe; 3, collection hole; 4, drain pipe; 5, loop pipe; 6, circulation pump; 7, mesh plate; 8, spray pipe; 9, spray plate; 10, spray hole; 11, reciprocating pipe; 12, cooling copper pipe; 13, condensation heat exchanger; 14, refrigerating machine; 15, expansion valve. Specific embodiments
[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1
[0021] Please refer to Figures 3 - 5 , the present utility model discloses a high-efficiency nitrogen liquefaction and collection device for air separation, including a separation tower 1 and a discharge pipe 2. The discharge pipe 2 is installed on the top surface of the separation tower 1. A collection hole 3 is opened on the bottom surface of the inner wall of the separation tower 1. A drain pipe 4 is installed on the outer surface of the separation tower 1. A circulation pipe 5 is installed on the inner wall of the collection hole 3. A circulation pump 6 is installed on the outer surface of the separation tower 1. An expansion valve 15 is installed on the bottom surface of the discharge pipe 2. A spraying assembly is installed on the inner wall of the separation tower 1. A cooling assembly is installed on the outer surface of the separation tower 1.
[0022] The discharge pipe 2 is in internal communication with the inside of the separation tower 1. The drain pipe 4 is in internal communication with the inside of the separation tower 1. One end of the circulation pipe 5 is connected to the output end of the circulation pump 6. There are two discharge pipes 2, and the two discharge pipes 2 are connected to each other through the expansion valve 15.
[0023] The spraying assembly includes a mesh plate 7. A spray pipe 8 is installed on the inner wall of the mesh plate 7. A spray plate 9 is installed on the top surface of the spray pipe 8. Spray holes 10 are formed on the bottom surface of the spray plate 9. A reciprocating pipe 11 is installed on the outer surface of the spray pipe 8. The mesh plate 7 is installed on the inner wall of the separation tower 1.
[0024] There are two mesh plates 7, and the two mesh plates 7 are equidistantly distributed on the inner wall of the separation tower 1. The outer surface of the spray pipe 8 is fixedly connected to the inner walls of the two mesh plates 7. One end of the spray pipe 8 extends from the outer surface of the separation tower 1 to its interior.
[0025] The interior of the spray pipe 8 and the spray plate 9 are interconnected. The spray holes 10 are several and are equidistantly distributed on the bottom surface of the spray plate 9. One end of the reciprocating pipe 11 is interconnected with the interior of the spray pipe 8, and the other end of the reciprocating pipe 11 is interconnected with the output end of the circulation pump 6.
[0026] When the temperature inside the separation tower 1 decreases, at the lower temperature, the kinetic energy of gas molecules decreases, making the adsorption efficiency of the adsorbent for gas molecules higher. This helps to more effectively adsorb the target gas nitrogen from the mixed gas. When the adsorbent falls to the bottom end of the inner wall of the separation tower 1, it will fall into the collection hole 3 formed on the bottom surface of the separation tower 1 and flow into the circulation pipe 5 through the collection hole 3. One end of the circulation pipe 5 is interconnected with the output end of the circulation pump 6. At this time, the adsorbent flowing into the circulation pipe 5 will be input into the inner wall of the spray pipe 8 again by the activated circulation pump 6 and sprayed out from the spray pipe 8, realizing the circulation of the adsorbent and maintaining the low temperature inside the separation tower 1. Embodiment 2
[0027] Based on the above-mentioned Embodiment 1, please refer to Figures 1 - 2 , the cooling assembly includes a cooling copper pipe 12. A condensation heat exchanger 13 is installed on the outer surface of the separation tower 1. A refrigerator 14 is installed on the outer surface of the separation tower 1. The cooling copper pipe 12 is installed on the outer surface of the discharge pipe 2.
[0028] The condensation heat exchanger 13 is interconnected with the interior of the cooling copper pipe 12 through a pipeline. The inner wall of the cooling copper pipe 12 is fixedly connected to the outer surface of the discharge pipe 2. The output end of the refrigerator 14 is interconnected with the interior of the separation tower 1.
[0029] When nitrogen passes through the expansion valve 15, its pressure suddenly decreases, which causes the enthalpy of the gas to decrease, thereby reducing the internal heat of the gas and resulting in a temperature drop to achieve a cooling effect. When nitrogen passes through the expansion valve 15, it will enter the discharge pipe 2 again, and the cooling copper pipe 12 is installed on the outer surface of the discharge pipe 2. At this time, the started condensation heat exchanger 13 will transport the low temperature to the inner wall of the cooling copper pipe 12. Since the cooling copper pipe 12 surrounds the outer surface of the discharge pipe 2, when the low temperature enters the cooling copper pipe 12, the low temperature will cool the nitrogen inside the discharge pipe 2 through the discharge pipe 2, making the nitrogen reach the liquefaction standard, thereby realizing the separation and collection of nitrogen.
[0030] The working principle and usage process of the present utility model: When the nitrogen liquefaction and collection device is needed, the filling balls are placed on the top surface of the wire mesh plate 7. At this time, the gas to be separated is discharged into the inside of the separation tower 1, and water is discharged into the spray pipe 8. The spray pipe 8 is interconnected with the spray plate 9. At this time, the adsorbent flowing into the spray plate 9 will be ejected from the spray holes 10. At this time, the ejected adsorbent will come into contact with the gas. Through the full contact between the ejected adsorbent and the gas, the dissolution and reaction rate of the gas are improved. When the adsorbent falls, it will fall onto the surface of the packing balls, making the packing balls wet. Further, through the full contact between the packing balls and the gas, and when spraying, the refrigerator 14 installed on the outer surface of the separation tower 1 will be started. By starting the refrigerator 14, the temperature inside the separation tower 1 is reduced, and because the adsorbent is sprayed inside the separation tower 1, the started refrigerator 14 will cool the adsorbent. When the temperature inside the separation tower 1 decreases, at a lower temperature, the kinetic energy of gas molecules decreases, making the adsorption efficiency of the adsorbent for gas molecules higher, which helps to more effectively adsorb the target gas nitrogen from the mixed gas. When the adsorbent falls to the bottom end of the inner wall of the separation tower 1, it will fall into the collection hole 3 opened on the bottom surface of the separation tower 1 and flow into the circulation pipe 5 through the collection hole 3. One end of the circulation pipe 5 is interconnected with the output end of the circulation pump 6. At this time, the adsorbent flowing into the circulation pipe 5 will be input into the inner wall of the spray pipe 8 again by the started circulation pump 6 and ejected from the spray pipe 8, realizing the circulation of the adsorbent and maintaining the low temperature inside the separation tower 1.
[0031] When nitrogen is separated from other gases by low temperature and spraying, since nitrogen is a light gas, it tends to rise to a higher position during the separation process. At this time, the separated nitrogen will enter the inner wall of the discharge pipe 2. When the separated nitrogen moves along the discharge pipe 2, the nitrogen will move to the inner wall of the expansion valve 15. When the nitrogen passes through the expansion valve 15, its pressure suddenly decreases, which causes the enthalpy of the gas to decrease, thereby reducing the heat inside the gas and resulting in a temperature drop to achieve a cooling effect. When the nitrogen passes through the expansion valve 15, it will enter the discharge pipe 2 again, and the cooling copper pipe 12 is installed on the outer surface of the discharge pipe 2. At this time, the started condensation heat exchanger 13 will transfer the low temperature to the inner wall of the cooling copper pipe 12. Since the cooling copper pipe 12 surrounds the outer surface of the discharge pipe 2, when the low temperature enters the cooling copper pipe 12, the low temperature will cool the nitrogen inside the discharge pipe 2, making the nitrogen reach the liquefaction standard, thereby realizing the separation and collection of nitrogen.
Claims
1. A highly efficient nitrogen liquefaction and collection device for air separation, comprising a separation tower (1) and a discharge pipe (2), wherein the discharge pipe (2) is installed on the top surface of the separation tower (1), characterized in that: A collecting hole (3) is provided on the bottom surface of the inner wall of the separation tower (1); a drain pipe (4) is installed on the outer surface of the separation tower (1); a circulating pipe (5) is installed on the inner wall of the collecting hole (3); a circulating pump (6) is installed on the outer surface of the separation tower (1); an expansion valve (15) is installed on the bottom surface of the discharge pipe (2); a spraying assembly is installed on the inner wall of the separation tower (1); and a cooling assembly is installed on the outer surface of the separation tower (1).
2. The high-efficiency nitrogen liquefaction and collection equipment for air separation according to claim 1, characterized in that: The discharge pipe (2) is interconnected with the interior of the separation tower (1), the drain pipe (4) is interconnected with the interior of the separation tower (1), one end of the circulation pipe (5) is interconnected with the output end of the circulation pump (6), there are two discharge pipes (2), and the two discharge pipes (2) are interconnected via an expansion valve (15).
3. The high-efficiency nitrogen liquefaction and collection equipment for air separation according to claim 1, characterized in that: The spray assembly comprises a mesh plate (7), a spray pipe (8) is installed on the inner wall of the mesh plate (7), a spray plate (9) is installed on the top surface of the spray pipe (8), a spray hole (10) is opened on the bottom surface of the spray plate (9), a reciprocating pipe (11) is installed on the outer surface of the spray pipe (8), and the mesh plate (7) is installed on the inner wall of the separation tower (1).
4. The high-efficiency nitrogen liquefaction and collection equipment for air separation according to claim 3, characterized in that: There are two mesh plates (7), which are equidistantly distributed on the inner wall of the separation tower (1); the outer surface of the spray pipe (8) is fixedly connected to the inner walls of the two mesh plates (7); and one end of the spray pipe (8) extends from the outer surface of the separation tower (1) to the interior thereof.
5. The high-efficiency nitrogen liquefaction and collection equipment for air separation according to claim 3, characterized in that: The spray pipe (8) is interconnected with the interior of the spray plate (9); the spray holes (10) are a plurality of equidistantly distributed on the bottom surface of the spray plate (9); one end of the reciprocating pipe (11) is interconnected with the interior of the spray pipe (8); and the other end of the reciprocating pipe (11) is connected to the output end of the circulation pump (6).
6. The high-efficiency nitrogen liquefaction and collection equipment for air separation according to claim 1, characterized in that: The cooling assembly comprises a cooling copper tube (12), a condensing heat exchanger (13) is installed on the outer surface of the separation tower (1), a refrigerator (14) is installed on the outer surface of the separation tower (1), and the cooling copper tube (12) is installed on the outer surface of the discharge pipe (2).
7. The high-efficiency nitrogen liquefaction and collection equipment for air separation according to claim 6, characterized in that: The condensing heat exchanger (13) is interconnected with the interior of the cooling copper tube (12) through a pipeline, the inner wall of the cooling copper tube (12) is fixedly connected to the outer surface of the discharge pipe (2), and the output end of the refrigerator (14) is interconnected with the interior of the separation tower (1).