Separating tower provided with gas distributor

Abstract

The utility model discloses a separation tower provided with a gas distributor. The separation tower comprises a main tower barrel and a main cooling barrel, the gas distributor comprises a short shell ring and two circular ring plates; a plurality of square holes are formed in the short cylindrical section in a penetrating manner; a tear hole is formed in the lower circular ring plate in a penetrating manner; an angle plate is arranged on the short shell section; and the angle plate is opposite to the air inlet. The utility model has the advantages of simple structure, no compound layered structure and convenience in processing, manufacturing and assembling. Gas is separated by the angle plates to flow to two sides, passes through the square holes and then flows to the upper part of the main tower barrel, so that the gas flows smoothly and slowly, and the impact force and noise are reduced; resistance change at the air inlet is gentle, operation is stable, and fluctuation change of the liquid level surface in main tower equipment is small. The cold medium in the main cooler can keep the upper seal head of the main tower wrapped by the cold medium, so that the cold loss of the main tower is reduced. Liquid nitrogen output by the main cooler enters from the upper part of the main tower to ensure the purity of a nitrogen product at an outlet of the main tower.

Description

Technical Field

[0001] This utility model belongs to the field of gas separation technology, and in particular relates to a separation tower equipped with a gas distributor. Background Technology

[0002] The overall design system in the field of air separation equipment includes main tower, main cooler, and other equipment. Common problems and drawbacks in main tower design technology include: 1. The air inlet medium, after passing through the baffles, cannot achieve energy mixing and exchange along the designed path; 2. The main tower's operation within the cylinder generates significant fluid impact and may produce considerable noise; 3. The air inlet medium entering the cylinder cannot exchange heat evenly and effectively with the descending cooling medium at the top of the main tower; 4. The impact of the air inlet medium causes large changes in equipment resistance; 5. The impact of the air inlet medium causes large fluctuations in the liquid level surface within the equipment.

[0003] Chinese patent document CN210751960U discloses an adsorption tower for a nitrogen generator. It utilizes a frustum-shaped gas distributor to evenly distribute the air to be separated and adsorbed, preventing the air from concentrating in one place and reducing adsorption efficiency. An inlet pipe and a distribution block ensure that the incoming air is evenly dispersed around the distribution block, preparing for uniform distribution. Multiple first distribution zones, second distribution zones, inner distribution zones, outer distribution zones, and main distribution zones ensure uniform gas dispersion, increasing the contact area between the gas and the adsorbent. Main and secondary gas vents connect the various distribution zones, preventing excessive local pressure that could affect gas distribution.

[0004] In the aforementioned patented solution, the gas distributor is designed with a multi-layer structure to disperse the gas entering the adsorption tower. This multi-layer gas distributor is not only large in size and mass, but also difficult to manufacture and assemble. Furthermore, in the aforementioned patented solution, after heat exchange occurs in the middle of the adsorption tower, significant heat loss occurs in the upper part of the tower, resulting in a temperature increase. This is detrimental to the smooth operation of the gas process and leads to insufficient purity of the produced gas. Utility Model Content

[0005] To overcome the technical problems of high temperature at the top of the adsorption tower hindering smooth process flow and high-purity gas production, and the complex structure of the distributor at the bottom of the adsorption tower resulting in large volume, mass, and difficult manufacturing, this invention aims to provide a separation tower with a gas distributor. By placing the main cooler at the top of the main tower, the cooling medium inside the main cooler can maintain a low temperature at the top of the main tower while undergoing heat exchange. Furthermore, the gas distributor is designed with two annular plates and a short cylindrical section, which simplifies the structure while dispersing the gas entering the main tower.

[0006] To achieve the above objectives, this utility model employs the following technical solution: a separation tower equipped with a gas distributor, comprising a main tower body and a main cold cylinder body disposed at the upper end of the main tower body; a cold medium in the main cold cylinder body is conveyed to the upper end of the main tower body; a gas distributor is disposed at the lower part of the main tower body above the highest liquid level; the gas distributor comprises a short cylindrical section coaxially disposed within the main tower body and two annular plates respectively horizontally disposed at both ends of the short cylindrical section; the outer wall of the annular plates is disposed on the inner wall of the main tower body; the short cylindrical section is disposed on the inner wall of the annular plates; wherein, a plurality of square holes evenly distributed along the circumferential direction are provided through the short cylindrical section; a plurality of teardrop holes evenly distributed along the circumferential direction are provided through the lower annular plate; an angled plate is disposed on the short cylindrical section; the angled plate is directly opposite the air inlet of the main tower body.

[0007] The two annular plates are arranged at different heights and connected in the middle by a short cylindrical section, which can reinforce each other and avoid impact damage. The two annular plates are welded to the main tower body to form a fluid space. The fluid is guided into the short cylindrical section and the airflow is evenly directed to the center of the short cylindrical body through the square holes, which is conducive to the exchange of medium energy.

[0008] The tear ducts are symmetrically distributed on the lower annular plate, which can drain the fluid remaining inside the gas distributor after the main tower medium exchange, and at the same time balance the accumulated pressure inside the gas distributor during normal operation.

[0009] Furthermore, the horizontal cross-section of the angle plate is L-shaped, and the left and right ends of the angle plate are respectively disposed on the outer wall of the short cylindrical section, and the middle part of the angle plate is directly opposite the air inlet; the upper and lower ends of the angle plate are respectively separated from the adjacent annular plates by gaps.

[0010] Specifically, the lower end of the square hole abuts against the annular plate located below; the upper end of the square hole is located below the upper end of the angled plate.

[0011] Specifically, the distance between the two annular plates is greater than or equal to 1.3 times the diameter of the air inlet.

[0012] Specifically, the air inlet is located between the two annular plates; the distance between the opening edge of the air inlet and the adjacent annular plate is greater than or equal to 50 mm.

[0013] Furthermore, a reinforcing ring is provided on the outer wall of the upper end of the main tower body; the main cooling cylinder body is located on the upper end of the reinforcing ring;

[0014] Furthermore, the cooling medium is liquid nitrogen; a plate heat exchanger is installed inside the main cooling cylinder; a nitrogen inlet for introducing nitrogen into the upper part of the plate heat exchanger is provided at the upper part of the main cooling cylinder; a liquid nitrogen outlet for discharging liquid nitrogen from the lower part of the plate heat exchanger is provided at the lower part of the main cooling cylinder; a liquid air inlet for introducing liquid air is provided at the upper part of the main cooling cylinder; an air outlet for discharging air is provided at the upper end of the main cooling cylinder; and a main cooling liquid air outlet for discharging liquid air is provided at the lower part of the main cooling cylinder.

[0015] Specifically, a purging pipe is provided at the lower part of the main cooling cylinder; the purging pipe is connected to the liquid nitrogen outlet and the plate heat exchanger.

[0016] Furthermore, a main cooling liquid nitrogen inlet is provided at the upper end of the main tower body; a nitrogen product outlet is provided at the upper end of the main tower body; the nitrogen product outlet and the main cooling liquid nitrogen inlet are located at the same height; a liquid distributor and a collecting liquid distributor are arranged sequentially from top to bottom inside the main tower body between the main cooling liquid nitrogen inlet and the gas distributor.

[0017] Specifically, the outer wall of the main tower shell is provided with an upper inlet of a resistance gauge above the main cold liquid nitrogen inlet; the lower end of the main tower shell is provided with a lower inlet of a level gauge; and the outer wall of the main tower shell is provided with an upper inlet of a level gauge and a lower inlet of a resistance gauge between the gas distributor and the collecting liquid distributor.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] 1. The gas distributor of this utility model consists of a short cylindrical section, two annular plates and an angular plate. It has a simple structure, no complex layered structure, and exposed welding and assembly positions, which facilitates processing, manufacturing and assembly.

[0020] 2. The gas entering the main tower body through the air inlet is separated by the angled plate and flows to both sides. After passing through the square hole, it flows to the upper part of the main tower body. The gas flow is smooth and gentle, and the impact force and noise are reduced. The resistance at the air inlet changes gently, the operation is stable, and the surface fluctuation of the liquid level in the main tower equipment is small.

[0021] 3. The main cooling unit of this utility model is located at the top of the main tower. The cooling medium inside the main cooling unit can keep the upper end cap of the main tower wrapped in the cooling medium, thereby reducing the cooling loss of the main tower and ensuring the purity of the nitrogen product at the outlet of the main tower.

[0022] 4. The liquid nitrogen output from the main condenser enters the main tower from the upper part to continue the energy exchange of the medium, ensuring the purity of the nitrogen product at the outlet of the main tower; the air output from the main condenser enters the main tower through the air inlet or other inlets at the lower part of the main tower for energy exchange; the gas circulates smoothly, and the process route is unobstructed. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the gas distributor of this utility model;

[0025] Figure 3 This is a schematic diagram of the main tower body of this utility model;

[0026] Figure 4 This is a schematic diagram of the main cooling cylinder of this utility model.

[0027] In the diagram: 1. Main tower shell; 10. Reinforcing ring; 11. Air inlet; 12. Packing; 13. Upper opening of resistance gauge; 14. Nitrogen product outlet; 15. Upper opening of level gauge and lower opening of resistance gauge; 16. Lower opening of level gauge; 17. Main tower liquid air outlet; 18. Liquid air discharge port; 191. Main refrigeration liquid nitrogen inlet; 192. Auxiliary refrigeration liquid nitrogen inlet; 2. Main refrigeration shell; 21. Liquid nitrogen outlet; 22. Purge pipe; 23. Plate heat exchanger; 24. Liquid air inlet; 25. Nitrogen inlet; 26. Main refrigeration liquid air outlet; 27. Air outlet; 3. Gas distributor; 31. Circular ring plate; 311. Tear hole; 32. Short cylinder section; 321. Square hole; 33. Angle plate; 34. Spacing; 4. Highest liquid level; 5. Liquid distributor; 6. Collecting type liquid distributor. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0029] In the description of this utility model, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, terms such as "set" and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] See Figures 1-4 A separation tower equipped with a gas distributor includes a main tower body 1 and a main cooling cylinder 2 disposed at the upper end of the main tower body 1; a gas distributor 3 is disposed at the lower part of the main tower body 1 above the highest liquid level 4; the gas distributor 3 includes a short cylindrical section 32 coaxially disposed within the main tower body 1 and two annular plates 31 respectively horizontally disposed at both ends of the short cylindrical section 32; the outer wall of the annular plate 31 is disposed on the inner wall of the main tower body 1; the short cylindrical section 32 is disposed on the inner wall of the annular plate 31.

[0033] An angled plate 33 is provided on the outer wall of the short cylindrical section 32; the horizontal cross-section of the angled plate 33 is L-shaped, and the left and right ends of the angled plate 33 are respectively provided on the outer wall of the short cylindrical section 32, and the middle part of the angled plate 33 is directly opposite to the air inlet 11; the upper and lower ends of the angled plate 33 are respectively provided with a gap 34 between them and the adjacent annular plate 31.

[0034] The short cylindrical section 32 is provided with a plurality of square holes 321 evenly distributed along the circumference; the lower end of the square hole 321 abuts against the annular plate 31 located below; the upper end of the square hole 321 is located below the upper end of the angled plate 33.

[0035] The lower annular plate 31 has a plurality of teardrop-shaped holes 311 evenly distributed along the circumference. The distance between the two annular plates 31 is greater than or equal to 1.3 times the diameter of the air inlet 11; the air inlet 11 is located between the two annular plates 31; the distance between the opening edge of the air inlet 11 and the adjacent annular plate 31 is greater than or equal to 50 mm.

[0036] A reinforcing ring 10 is provided on the outer wall of the upper end of the main tower body 1; the main cooling cylinder 2 is located on the upper end of the reinforcing ring 10; the cooling medium is liquid nitrogen.

[0037] A plate heat exchanger 23 is installed inside the main cooling cylinder 2. A nitrogen inlet 25 is provided at the upper part of the main cooling cylinder 2 for introducing nitrogen gas into the upper part of the plate heat exchanger 23. A liquid nitrogen outlet 21 is provided at the lower part of the main cooling cylinder 2 for discharging liquid nitrogen from the lower part of the plate heat exchanger 23. A liquid air inlet 24 is provided at the upper part of the main cooling cylinder 2 for introducing liquid air. An air outlet 27 is provided at the upper end of the main cooling cylinder 2 for discharging air. A main cooling liquid air outlet 26 is provided at the lower part of the main cooling cylinder 2 for discharging liquid air. A purge pipe 22 is provided at the lower part of the main cooling cylinder 2; the purge pipe 22 is connected to the liquid nitrogen outlet 21 and the plate heat exchanger 23 at a connecting position.

[0038] The main tower body 1 is provided with a main cooling liquid nitrogen inlet 191 at its upper end; the main tower body 1 is provided with a secondary cooling liquid nitrogen inlet 192 at its upper end; the main tower body 1 is provided with a nitrogen product outlet 14 at its upper end; the nitrogen product outlet 14 and the main cooling liquid nitrogen inlet 191 are located at the same height; inside the main tower body 1, between the main cooling liquid nitrogen inlet 191 and the gas distributor 3, a liquid distributor 5 and a collecting liquid distributor 6 are arranged sequentially from top to bottom; the main tower body 1 is provided with packing 12.

[0039] The outer wall of the main tower body 1 is provided with a resistance gauge upper port 13 above the main cold liquid nitrogen inlet 191; the lower end of the main tower body is provided with a level gauge lower port 16; the outer wall of the main tower body 1 is provided with a level gauge upper port and a resistance gauge lower port 15 between the gas distributor 3 and the collecting liquid distributor 6.

[0040] The lower end of the main tower body 1 is provided with a liquid air discharge port 18 for discharging liquid air; the lower end of the main tower body 1 is provided with a main tower liquid air outlet 17.

[0041] The circulation process is as follows Figure 1 As shown, air enters the main tower body 1 through air inlet 11, and is separated by angled plates 33, flowing to both sides, namely between the short section 32 and the main tower body 1. Subsequently, the air enters the short section 32 through square holes 321, and then flows upward within the main tower body 1. Liquid nitrogen enters the main tower body 1 through the main cooling liquid nitrogen inlet 191 and the auxiliary cooling liquid nitrogen inlet 192, flowing downward. Air and liquid nitrogen meet and exchange heat in the middle of the main tower body 1. Nitrogen product flows out through nitrogen product outlet 14, and the remaining liquid air is discharged downward through the main tower liquid air outlet 17 and liquid air discharge port 18.

[0042] Nitrogen gas enters the plate heat exchanger 23 through nitrogen gas inlet 25 and liquid air enters the plate heat exchanger 23 through liquid air inlet 24 for heat exchange. Liquid nitrogen gas flows out through liquid nitrogen outlet 21 and enters the main cooling liquid nitrogen inlet 191. Air is output through air outlet 27 and enters the main tower body 1 through air inlet 11.

[0043] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A separation tower equipped with a gas distributor, characterized in that: The system includes a main tower body and a main cooling cylinder located at the upper end of the main tower body. A cooling medium within the main cooling cylinder is conveyed to the upper end of the main tower body. A gas distributor is located above the highest liquid level at the lower part of the main tower body. The gas distributor includes a short cylindrical section coaxially disposed within the main tower body and two annular plates horizontally disposed at both ends of the short cylindrical section. The outer wall of the annular plates is disposed on the inner wall of the main tower body. The short cylindrical section is disposed on the inner wall of the annular plates. Multiple square holes evenly distributed along the circumference are perforated through the short cylindrical section. Multiple teardrop-shaped holes evenly distributed along the circumference are perforated through the lower annular plate. An angled plate is disposed on the short cylindrical section, directly opposite the air inlet of the main tower body.

2. The separation tower as described in claim 1, characterized in that: The angled plate has an L-shaped horizontal cross-section. The left and right ends of the angled plate are respectively located on the outer wall of the short cylindrical section. The middle part of the angled plate is directly opposite the air inlet. The upper and lower ends of the angled plate are respectively separated from the adjacent annular plate by a gap.

3. The separation tower as described in claim 2, characterized in that: The lower end of the square hole abuts against the annular plate located below; the upper end of the square hole is located below the upper end of the angled plate.

4. The separation tower as described in any one of claims 1-3, characterized in that: The distance between the two annular plates is greater than or equal to 1.3 times the diameter of the air inlet.

5. The separation tower as described in any one of claims 1-3, characterized in that: The air inlet is located between the two annular plates; the distance between the opening edge of the air inlet and the adjacent annular plate is greater than or equal to 50 mm.

6. The separation tower as described in any one of claims 1-3, characterized in that: A reinforcing ring is provided on the outer wall of the upper end of the main tower body; the main cooling cylinder body is located on the upper end of the reinforcing ring.

7. The separation tower as described in any one of claims 1-3, characterized in that: The cooling medium is liquid nitrogen; a plate heat exchanger is installed inside the main cooling cylinder; a nitrogen inlet is provided at the upper part of the main cooling cylinder for introducing nitrogen into the upper part of the plate heat exchanger; a liquid nitrogen outlet is provided at the lower part of the main cooling cylinder for discharging liquid nitrogen from the lower part of the plate heat exchanger; a liquid air inlet is provided at the upper part of the main cooling cylinder for introducing liquid air; an air outlet is provided at the upper end of the main cooling cylinder for discharging air; and a main cooling liquid air outlet is provided at the lower part of the main cooling cylinder for discharging liquid air.

8. The separation tower as described in claim 7, characterized in that: A purging pipe is provided at the lower part of the main cooling cylinder; the purging pipe is connected to the liquid nitrogen outlet and the plate heat exchanger.

9. The separation tower as described in any one of claims 1-3, characterized in that: The main tower body is provided with a main cooling liquid nitrogen inlet at the upper end; the main tower body is provided with a nitrogen product outlet at the upper end; the nitrogen product outlet and the main cooling liquid nitrogen inlet are located at the same height; a liquid distributor and a collecting liquid distributor are arranged sequentially from top to bottom in the main tower body between the main cooling liquid nitrogen inlet and the gas distributor.

10. The separation tower as described in claim 9, characterized in that: The outer wall of the main tower shell is provided with an upper inlet of a resistance gauge above the main cold liquid nitrogen inlet; the lower end of the main tower shell is provided with a lower inlet of a level gauge; the outer wall of the main tower shell is provided with an upper inlet of a level gauge and a lower inlet of a resistance gauge between the gas distributor and the collecting liquid distributor.

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