Energy-efficient deep-cooling fractionation nitrogen production device

Abstract

The utility model relates to a kind of high-efficiency energy-saving type cryogenic fractionation nitrogen device applied to nitrogen device field, including cryogenic fractionation nitrogen device component, filler component is provided in cryogenic fractionation nitrogen device component, filler component is provided with with airflow shaking subassembly, filler component is provided with magnetic auxiliary shaking subassembly, cryogenic fractionation nitrogen device component includes rough separation tower, the upper end of rough separation tower is fixedly connected with fine separation tower, in the above high-efficiency energy-saving type cryogenic fractionation nitrogen device, the design of corrugated filler plate in filler component, cooperate with airflow shaking subassembly and magnetic auxiliary shaking subassembly, significantly improve gas-liquid contact efficiency, avoid the liquid retention and gas short circuit problem that traditional fixed filler easily appears, make nitrogen-oxygen separation more fully, improve product purity, condensing evaporator is used as condenser and reboiler of fine separation tower, realize the direct exchange of upper and lower tower heat, reduce additional energy consumption.

Description

Technical Field

[0001] This utility model relates to a cryogenic fractionation nitrogen production device, and in particular to a high-efficiency and energy-saving cryogenic fractionation nitrogen production device applied in the field of nitrogen production devices. Background Technology

[0002] With industrial development, more and more industries are using nitrogen as an important raw material or auxiliary gas in production processes. For example, the food industry uses nitrogen to extend the shelf life of food; the chemical industry uses nitrogen as a protective gas or reaction medium; and the medical industry uses nitrogen to prepare high-purity nitrogen for the sterilization of medical equipment. Cryogenic fractionation is the mainstream process for the industrial preparation of high-purity nitrogen. It separates oxygen and nitrogen by liquefying compressed air and utilizing the difference in boiling points. It is widely used in food preservation, chemical protection, and medical sterilization.

[0003] Chinese patent CN220513770U discloses a nitrogen generator, including an air compressor, an air buffer tank, a dryer, an inlet process tank, a nitrogen generator main unit, a nitrogen buffer tank, a central control component, and a monitoring component. The air compressor is equipped with a first vibration sensor; the air buffer tank is connected to the air compressor and is connected to a first filter; the dryer has a second housing, on which a second vibration sensor is installed; the central control component is electrically connected to the air compressor, dryer, and nitrogen generator main unit; the monitoring component is mounted on the central control component and includes a main control module, a noise monitoring sensor electrically connected to the main control module, and a first power line carrier communication module. The main control module is also electrically connected to the first and second vibration sensors. This invention enables remote safety monitoring, and the installation of the monitoring component does not require modification of the central control component, making installation convenient and cost-effective.

[0004] In traditional equipment, the condenser and reboiler are mostly set up independently, connected to the upper and lower towers by long pipelines. This results in large cooling losses and high additional energy consumption. The cooling capacity of the oxygen-enriched liquid air and the product liquid oxygen is not fully utilized, further aggravating the energy consumption problem. This makes it difficult to meet the modern industrial demand for efficient, energy-saving, and compact equipment. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by this utility model is that the condenser and reboiler of traditional equipment are mostly set up independently and connected to the upper and lower towers through long pipelines. This results in large cooling loss, high additional energy consumption, and the cooling capacity of oxygen-enriched liquid air and product liquid oxygen is not fully utilized, further aggravating the energy consumption problem. It is difficult to meet the modern industrial demand for efficient, energy-saving and compact equipment.

[0006] To address the aforementioned problems, this utility model provides a high-efficiency and energy-saving cryogenic fractionation nitrogen generation device, including a cryogenic fractionation nitrogen generation device assembly, a packing assembly within the cryogenic fractionation nitrogen generation device assembly, a swaying assembly that moves with the airflow within the packing assembly, and a magnetically assisted swaying assembly within the packing assembly.

[0007] The cryogenic fractionation nitrogen production unit includes a coarse fractionation tower, a fine fractionation tower fixedly connected to the upper end of the coarse fractionation tower, an air inlet pipe fixedly connected to the lower left side of the coarse fractionation tower, and a nitrogen outlet fixedly connected to the middle of the upper end of the fine fractionation tower. Multiple circulation pipes are fixedly connected between the coarse fractionation tower, the condenser / evaporator, and the fine fractionation tower. A throttling valve is installed outside the circulation pipe on the left side. The packing assembly includes two pairs of arc-shaped inner frames, which are respectively installed in the condenser / evaporator and the coarse fractionation tower. Multiple corrugated packing plates are installed at the inner ends of the arc-shaped inner frames, and the multiple holes are evenly distributed. The swaying assembly with airflow includes multiple pairs of perforated groove side seats.

[0008] In the aforementioned high-efficiency and energy-saving cryogenic fractionation nitrogen production unit, the design of the corrugated packing plate in the packing assembly, combined with the airflow swaying component and the magnetically assisted swaying component, significantly improves the gas-liquid contact efficiency, avoids the liquid retention and gas short-circuiting problems that are prone to occur in traditional fixed packing, makes nitrogen and oxygen separation more complete, and improves product purity. The condenser-evaporator also serves as the condenser of the coarse fractionation column and the reboiler of the fine fractionation column, realizing direct heat exchange between the upper and lower columns and reducing additional energy consumption.

[0009] As a further improvement of this application, the outer end of the corrugated packing plate is provided with several holes, and the corresponding corrugated packing plates are arranged horizontally at equal intervals.

[0010] As a further improvement of this application, multiple pairs of hole-shaped groove side seats are fixedly connected to the upper inner wall of the arc-shaped inner frame, and a linkage inner shaft transverse bar is rotatably connected between two horizontally corresponding hole-shaped groove side seats.

[0011] As a further improvement of this application, the horizontal strip of the linkage inner shaft runs through the inside and outside of the corrugated packing plate corresponding to the horizontal direction, and the magnetic assisted shaking component includes multiple pairs of U-shaped groove seats.

[0012] As another improvement of this application, multiple pairs of U-shaped groove seats are fixedly connected to the lower inner wall of the arc-shaped inner frame, and inner sliding metal side blocks are symmetrically fixedly connected to the lower left and right ends of the corrugated filler plate.

[0013] As a further improvement to this application, an auxiliary spring is fixedly connected to the rear inner wall of the side U-shaped groove seat, and an elastic abutment is fixedly connected to one end of the auxiliary spring near the inner sliding metal side block.

[0014] As a further improvement to this application, each of the two U-shaped groove seats is fixedly connected to an electromagnetic inner groove at one end that is far apart from each other, and the electromagnetic inner groove and the corresponding inner sliding metal side block are magnetically connected to each other.

[0015] In summary, this device, through the design of the corrugated packing plate in the packing assembly, combined with the airflow-assisted swaying component and the magnetically assisted swaying component, significantly improves the gas-liquid contact efficiency, avoids the liquid retention and gas short-circuiting problems that are prone to occur in traditional fixed packing, and makes nitrogen and oxygen separation more complete, improving product purity. The condenser-evaporator also serves as the condenser of the coarse separation column and the reboiler of the fine separation column, realizing direct heat exchange between the upper and lower columns, reducing additional energy consumption. The cooling capacity of the oxygen-enriched liquid air and the product liquid oxygen is fully utilized, further reducing the energy consumption of the device. The combined structure of the arc-shaped inner frame and the corrugated packing plate, along with the evenly distributed holes, optimizes the flow channel inside the column and enhances gas-liquid flow. At the same time, the compact layout simplifies the circulation pipeline, reduces pipeline cold loss and space occupation, and makes the device structure more compact. The synergistic effect of airflow-assisted swaying and magnetically assisted swaying reduces the probability of impurities adhering to the packing surface, reduces the risk of blockage, extends the maintenance cycle, and improves the stability and continuity of the device operation, making it suitable for long-term high-efficiency production. Attached Figure Description

[0016] Figure 1 This is an isometric view of the components of the cryogenic fractionation nitrogen production apparatus according to the first embodiment of this application;

[0017] Figure 2 This is a side view of the components of the cryogenic fractionation nitrogen production apparatus according to the first embodiment of this application;

[0018] Figure 3 This is a side cross-sectional view of the components of the cryogenic fractionation nitrogen production device according to the first embodiment of this application;

[0019] Figure 4 This is a diagram of the internal structure of the precipitator according to the first embodiment of this application;

[0020] Figure 5 This is a structural diagram of the airflow swaying component according to the first embodiment of this application;

[0021] Figure 6 This is a structural diagram of the filler assembly according to the second embodiment of this application;

[0022] Figure 7 This is a structural diagram of the magnetically assisted shaking component according to the second embodiment of this application.

[0023] Explanation of the labels in the diagram:

[0024] 1. Cryogenic fractionation nitrogen production unit components; 100. Coarse fractionation tower; 102. Fine fractionation tower; 103. Condenser / evaporator; 104. Throttling valve; 105. Air inlet pipe; 106. Nitrogen outlet; 107. Circulation pipeline; 2. Packing assembly; 200. Arc-shaped inner frame; 201. Corrugated packing plate; 202. Hole; 3. Airflow swaying assembly; 300. Hole-shaped groove side seat; 301. Linkage inner shaft transverse bar; 4. Magnetic auxiliary swaying assembly; 400. Side U-shaped groove seat; 401. Elastic abutment; 402. Inner sliding metal side block; 403. Electromagnetic side inner groove; 404. Auxiliary spring component. Detailed Implementation

[0025] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0026] First implementation method:

[0027] Figures 1-5 A high-efficiency and energy-saving cryogenic fractionation nitrogen generation device is shown, including a cryogenic fractionation nitrogen generation device component 1, a packing component 2 is provided inside the cryogenic fractionation nitrogen generation device component 1, a swaying component 3 is provided in the packing component 2, and a magnetically assisted swaying component 4 is provided in the packing component 2.

[0028] The cryogenic fractionation nitrogen production unit component 1 includes a coarse fractionation tower 100, a fine fractionation tower 102 fixedly connected to the upper end of the coarse fractionation tower 100, an air inlet pipe 105 fixedly connected to the lower left side of the coarse fractionation tower 100, a nitrogen outlet 106 fixedly connected to the middle of the upper end of the fine fractionation tower 102, and multiple circulation pipes 107 fixedly connected between the coarse fractionation tower 100, the condenser evaporator 103, and the fine fractionation tower 102. A throttling valve 104 is installed outside the circulation pipe 107 on the left side. The packing component 2 includes two pairs of arc-shaped inner frames 200, which are respectively installed in the condenser evaporator 103 and the coarse fractionation tower 100. Multiple corrugated packing plates 201 are installed at the inner end of the arc-shaped inner frames 200, and the multiple holes 202 are evenly distributed among them. The component 3, which sways with the airflow, includes multiple pairs of perforated groove side seats 300.

[0029] The outer end of the corrugated packing plate 201 is provided with several holes 202, and the corresponding corrugated packing plates 201 are arranged horizontally at equal intervals. Multiple pairs of perforated groove side seats 300 are fixedly connected to the upper inner side wall of the arc-shaped inner frame 200. A linkage inner shaft transverse bar 301 is rotatably connected between two horizontally corresponding perforated groove side seats 300. The linkage inner shaft transverse bar 301 passes through the inside and outside of the horizontally corresponding corrugated packing plate 201.

[0030] Figures 1-5The purified air enters the bottom of the coarse fractionation column 100 of the cryogenic fractionation nitrogen generator assembly 1 through the air inlet pipe 105, where preliminary gas-liquid separation begins. The coarse fractionation column 100 contains a packing assembly 2, whose two pairs of arc-shaped inner frames 200 provide support for the core separation structure. Multiple corrugated packing plates 201 at the inner ends of the arc-shaped inner frames 200 form separation channels through horizontal equidistant arrangement. The uniformly distributed holes 202 at the outer ends of the corrugated packing plates 201 enhance gas-liquid flow and increase the contact area. During the separation process, nitrogen, as a light component, vaporizes and rises. Oxygen, as a heavy component, condenses and flows downward. During this process, the airflow swaying component 3 and the magnetically assisted swaying component 4 work together. The multiple pairs of perforated groove side seats 300 of the airflow swaying component 3 are fixed above the inner wall of the arc-shaped inner frame 200. The horizontally connected linkage inner shaft transverse bar 301 between the horizontally corresponding perforated groove side seats 300 passes through the corrugated packing plate 201, so that the corrugated packing plate 201 can sway naturally with the slight fluctuation of the rising airflow, improving the coarse separation efficiency. Finally, nitrogen containing a small amount of oxygen is formed at the top of the coarse separation tower 100, and oxygen-rich liquid air is generated at the bottom.

[0031] Nitrogen gas at the top of the coarse separator 100 enters the condenser evaporator 103 through the circulation pipe 107. The condenser evaporator 103 is also equipped with a packing assembly 2, whose arc-shaped inner frame 200 and corrugated packing plate 201 structure assist the nitrogen gas to cool and condense into liquid nitrogen quickly. Part of the liquid nitrogen flows back to the top of the coarse separator 100 through the circulation pipe 107 as reflux liquid to enhance the coarse separation effect. The other part of the liquid nitrogen enters the top of the fine separator 102 after being regulated by the throttle valve 104 outside the circulation pipe 107. At the same time, the oxygen-enriched liquid air at the bottom of the coarse separator 100 enters the condenser evaporator 103 through the circulation pipe 107, absorbs the heat in the condenser evaporator 103 and vaporizes to form oxygen-enriched air, which then enters the bottom of the fine separator 102 through the circulation pipe 107.

[0032] Inside the purification column 102, liquid nitrogen from the top and oxygen-rich gas from the bottom are further separated, ultimately forming high-purity nitrogen at the top of the purification column 102, which is discharged through nitrogen outlet 106. The high-purity liquid oxygen generated at the bottom is then reintroduced into the condenser-evaporator 103 through the circulation pipe 107, where it evaporates to form high-purity oxygen product. Throughout the process, the condenser-evaporator 103 is tightly connected to the coarse separation column 100 and the purification column 102 through the circulation pipe 107, achieving efficient exchange of cold and heat. Meanwhile, the swaying structure of the packing assembly 2 continuously enhances the gas-liquid mass transfer efficiency, ultimately achieving the goal of efficient and energy-saving cryogenic fractionation nitrogen production.

[0033] Second implementation method:

[0034] Figures 6-7This invention discloses a high-efficiency and energy-saving cryogenic fractionation nitrogen generation device. The magnetically assisted shaking component 4 includes multiple pairs of side U-shaped groove seats 400, which are respectively fixedly connected to the lower inner wall of the arc-shaped inner frame 200. The lower left and right ends of the corrugated packing plate 201 are symmetrically fixedly connected to inner sliding metal side blocks 402. The rear inner wall of the side U-shaped groove seat 400 is fixedly connected to an auxiliary spring 404. The end of the auxiliary spring 404 near the inner sliding metal side block 402 is fixedly connected to an elastic abutment 401. The ends of the two side U-shaped groove seats 400 that are far apart from each other are fixedly connected to an electromagnetic side inner groove 403. The electromagnetic side inner groove 403 and the corresponding inner sliding metal side block 402 are magnetically connected to each other.

[0035] Meanwhile, the multiple pairs of U-shaped groove seats 400 of the magnetically assisted shaking component 4 are fixed below the inner wall of the arc-shaped inner frame 200. The inner sliding metal side blocks 402 at both ends of the corrugated packing plate 201 contact the elastic abutment 401 in the side U-shaped groove seat 400. The auxiliary spring 404 provides elastic support for the elastic abutment 401. The electromagnetic side inner groove 403 at the outer end of the side U-shaped groove seat 400 generates an alternating magnetic attraction force with the inner sliding metal side block 402, further assisting the corrugated packing plate 201 to make small-amplitude reciprocating shaking. The two work together to make the rising gas and the falling liquid fully contact the surface of the corrugated packing plate 201 and the holes 202, improve the coarse separation efficiency, and finally form nitrogen gas containing a small amount of oxygen at the top of the coarse separation tower 100 and oxygen-rich liquid air at the bottom.

[0036] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A high-efficiency and energy-saving cryogenic fractionation nitrogen production device, characterized in that: The device includes a cryogenic fractionation nitrogen generator assembly (1), which is equipped with a packing assembly (2), a gas flow swaying assembly (3) and a magnetically assisted swaying assembly (4). The cryogenic fractionation nitrogen production unit assembly (1) includes a coarse fractionation tower (100), a fine fractionation tower (102) fixedly connected to the upper end of the coarse fractionation tower (100), an air inlet pipe (105) fixedly connected to the lower left side of the coarse fractionation tower (100), a nitrogen outlet (106) fixedly connected to the middle of the upper end of the fine fractionation tower (102), and multiple circulation pipes (107) fixedly connected between the coarse fractionation tower (100), the condenser-evaporator (103), and the fine fractionation tower (102). A throttling valve (104) is installed outside the circulation pipe (107) on the left side. The material assembly (2) includes two pairs of arc-shaped inner frames (200), which are respectively installed in the condenser evaporator (103) and the coarse separation tower (100). Multiple corrugated packing plates (201) are installed at the inner end of the arc-shaped inner frame (200). Several holes (202) are opened at the outer end of the corrugated packing plate (201), and the corresponding corrugated packing plates (201) are arranged horizontally at equal intervals. The multiple holes (202) are evenly distributed. The airflow swaying assembly (3) includes multiple pairs of perforated groove side seats (300).

2. The high-efficiency and energy-saving cryogenic fractionation nitrogen production device according to claim 1, characterized in that: Multiple pairs of hole-shaped groove side seats (300) are fixedly connected to the upper inner wall of the arc-shaped inner frame (200), and a linkage inner shaft transverse bar (301) is rotatably connected between two horizontally corresponding hole-shaped groove side seats (300).

3. The high-efficiency and energy-saving cryogenic fractionation nitrogen production device according to claim 2, characterized in that: The horizontal bar (301) of the linkage inner shaft runs through the inside and outside of the corrugated packing plate (201) corresponding to the horizontal direction, and the magnetic auxiliary shaking component (4) includes multiple pairs of U-shaped groove seats (400).

4. The high-efficiency and energy-saving cryogenic fractionation nitrogen production device according to claim 3, characterized in that: Multiple pairs of U-shaped groove seats (400) are fixedly connected to the lower inner wall of the arc-shaped inner frame (200), and the lower left and right ends of the corrugated packing plate (201) are symmetrically fixedly connected with inner sliding metal side blocks (402).

5. The high-efficiency and energy-saving cryogenic fractionation nitrogen production device according to claim 4, characterized in that: An auxiliary spring (404) is fixedly connected to the rear inner wall of the side U-shaped groove seat (400), and an elastic abutment (401) is fixedly connected to one end of the auxiliary spring (404) near the inner sliding metal side block (402).

6. The high-efficiency and energy-saving cryogenic fractionation nitrogen production device according to claim 5, characterized in that: The two U-shaped groove seats (400) are fixedly connected to an electromagnetic side inner groove (403) at their far ends, and the electromagnetic side inner groove (403) and the corresponding inner sliding metal side block (402) are magnetically connected to each other.

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