Nitrogen drying device for nitrogen preparation

Abstract

The utility model discloses a nitrogen drying device for nitrogen preparation, and relates to the technical field of nitrogen drying devices. The device comprises a base, a freezing dryer and a drying machine are symmetrically arranged on the upper surface of the base, a connecting pipe is arranged between the freezing dryer and the drying machine, a drying plate is arranged in the drying machine, an air outlet pipe is arranged on the outer side surface of the drying machine, and a flange plate is fixedly arranged at the other end of the air outlet pipe. When the adsorption plate needs to be replaced, the movable rod can be pulled to enable the end portion of the movable rod to be separated from the interior of the connecting cylinder, then the fixing plate can be moved through the pull opening to enable the adsorption plate to be separated from the interior of the drying machine, the connecting plate with a new adsorption plate can be inserted into the fixing frame plate, and therefore the adsorption plate can be replaced. The connecting cylinder is inserted into the inserting opening, then the movable rod can be loosened, the end of the movable rod can be inserted into the connecting cylinder through the force of the spring, the adsorption plate can be replaced conveniently, and the adsorption efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of nitrogen drying devices, specifically a nitrogen drying device for nitrogen preparation. Background Technology

[0002] A nitrogen drying unit is a machine that dries nitrogen gas. It is one of the processes in nitrogen production. The main processes of nitrogen production include raw air filtration, compression, cooling, cleaning, pressurization, expansion, distillation, separation, heating, and external supply. Common methods for nitrogen production include liquid air fractionation, cryogenic separation, membrane separation, pressure swing adsorption, and pressure swing absorption. Since nitrogen accounts for 4 / 5 of the atmosphere, or more than 78% of the atmosphere, we can use nitrogen almost infinitely. Nitrogen is mainly produced by separating or decomposing nitrogen-containing compounds from the atmosphere.

[0003] Application number CN202320521591.1 discloses a nitrogen drying device for nitrogen preparation, relating to the technical field of nitrogen drying devices. It includes a refrigerated dryer, which is fixedly connected to a dryer via a conduit. The dryer includes a casing, with pipes fixedly connected to both sides of the casing surface. The inner wall of the dryer has a first adsorption layer, a second adsorption layer, a third adsorption layer, a fourth adsorption layer, and a fifth adsorption layer fixedly connected from top to bottom. A water-absorbing drying device is provided on the inner wall of the casing. This invention provides a superior drying process, reducing the number of substandard nitrogen gases detected in the nitrogen tank during subsequent purity testing. This improves the yield rate of nitrogen preparation, enhances the device's effectiveness, and increases its practicality.

[0004] However, the above setup still has some problems in use: the above equipment can make the nitrogen pass rate higher through multiple adsorption layers, but after the adsorption layer has been used for a period of time, the adsorption efficiency of the adsorption layer will decrease. Since the adsorption layer is mostly connected inside the dryer and is inconvenient to replace, long-term use will affect the adsorption efficiency of the equipment. In addition, the above equipment is connected to the conduit through a flange, and after the pipeline is connected, the gas can easily flow out from the gap at the connection, and the sealing is not strong. Utility Model Content

[0005] To address the issues that while the aforementioned equipment can achieve a higher nitrogen yield through multiple adsorption layers, the adsorption efficiency of these layers decreases after a period of use. Furthermore, since the adsorption layers are mostly connected inside the dryer and are inconvenient to replace, prolonged use will affect the equipment's adsorption efficiency. Additionally, the equipment is connected to the conduit via flanges, which allows gas to easily leak from the gaps at the connection points, resulting in poor sealing. Therefore, the purpose of this invention is to provide a nitrogen drying device for nitrogen preparation.

[0006] To solve the above technical problems, the present invention adopts the following technical solution: a nitrogen drying device for nitrogen preparation, comprising a base, a refrigerated dryer and a dryer symmetrically arranged on the upper surface of the base, a connecting pipe between the refrigerated dryer and the dryer, a drying plate inside the dryer, an exhaust pipe on the outer surface of the dryer, a flange fixedly arranged at the other end of the exhaust pipe, a sealing assembly connected to the flange, and an auxiliary replacement assembly connected to the outer surface of the dryer;

[0007] The auxiliary replacement assembly includes a side opening and a connecting plate. The side opening is located on the outer surface of the dryer. A fixed frame plate is fixedly mounted on the outer surface of the dryer. A fixed plate is fixedly mounted on one side of the connecting plate, and the fixed plate and the side of the connecting plate are movably fitted together. A circular frame is fixedly mounted on the inner surface of the connecting plate, and an adsorption plate is fixedly mounted on the inner surface of the circular frame. A hollow plate is fixedly mounted on the lower surface of the fixed frame plate, and a spring is fixedly mounted on the inner surface of the hollow plate. A sliding plate is fixedly mounted on the upper end of the spring, and a movable rod is fixedly mounted in the middle of the sliding plate. An insertion port is opened on one side of the fixed frame plate, and the movable rod movably passes through the hollow plate and the insertion port. A connecting cylinder is fixedly mounted on one side of the fixed plate, and the connecting cylinder is movably inserted into the insertion port. The upper end of the movable rod is movably inserted into the interior of the connecting cylinder. A fixed shell is fixedly mounted on the outer surface of the flange, and a protective plate is rotatably mounted on the fixed shell. A bolt is threadedly inserted into the protective plate, and the end of the bolt is threadedly inserted into the protective plate.

[0008] Preferably, the sealing assembly includes an annular groove formed on one side of the flange, a sealing airbag is fixedly provided on the inner surface of the annular groove, and an air guide pipe is fixedly provided on the outer surface of the sealing airbag. The air guide pipe passes through the flange, and a screw cap is threaded to the upper end of the air guide pipe.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0010] 1. When the adsorption plate needs to be replaced, the movable rod can be pulled to disengage its end from the connecting cylinder. Then, the fixed plate can be moved by pulling the opening to disengage the adsorption plate from the dryer. The connecting plate with the new adsorption plate can be inserted into the fixed frame plate, and the connecting cylinder can be inserted into the socket. Then, the movable rod can be released, and the end of the movable rod can be inserted into the connecting cylinder by the force of the spring, which facilitates the replacement of the adsorption plate and can improve the adsorption efficiency.

[0011] 2. After the conduit and the outlet pipe are connected, the end of the conduit can be removed from the protective plate by rotating the bolt. After rotating the protective plate, the cap will be exposed. After rotating the cap, the conduit can be removed from the conduit. Then, air can be pumped into the conduit by a tool, which will cause the sealing airbag to expand. The expanded sealing airbag can fill the gap between the flange and the conduit, thereby improving the sealing performance and reducing the possibility of air leakage. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the auxiliary replacement component structure of this utility model.

[0015] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0016] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B.

[0017] Figure 5 This is a schematic diagram of the flange structure of this utility model.

[0018] Figure 6 This utility model Figure 5 Enlarged structural diagram at point C.

[0019] Figure 7 This is a schematic diagram of the annular groove structure of this utility model.

[0020] In the diagram: 1. Base; 11. Refrigerated dryer; 12. Dryer; 13. Connecting pipe; 121. Air outlet pipe; 122. Flange; 123. Drying plate; 2. Auxiliary replacement components; 21. Side opening; 22. Fixing frame plate; 23. Connecting plate; 231. Fixing plate; 232. Pull-out opening; 24. Circular frame; 241. Adsorption plate; 25. Hollow plate; 26. Movable rod; 27. Spring; 28. Slide plate; 29. ​​Insert; 291. Connecting cylinder; 4. Sealing assembly; 41. Annular groove; 42. Sealing airbag; 43. Air guide pipe; 44. Rotary cap; 45. Fixing shell; 46. Protective plate; 47. Bolt. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Figure 1-7 As shown, this utility model provides a nitrogen drying device for nitrogen preparation, including a base 1. A refrigerated dryer 11 and a dryer 12 are symmetrically arranged on the upper surface of the base 1. A connecting pipe 13 is provided between the refrigerated dryer 11 and the dryer 12. A drying plate 123 is provided inside the dryer 12. The material of the drying plate 123 is anhydrous magnesium sulfate. An exhaust pipe 121 is provided on the outer surface of the dryer 12. A flange 122 is fixedly provided at the other end of the exhaust pipe 121. A sealing component 4 is connected to the flange 122. An auxiliary replacement component 2 is connected to the outer surface of the dryer 12.

[0023] The auxiliary replacement component 2 includes a side opening 21 and a connecting plate 23. The side opening 21 is located on the outer surface of the dryer 12. A fixed frame plate 22 is fixedly provided on the outer surface of the dryer 12. A fixed plate 231 is fixedly provided on one side of the connecting plate 23. The fixed plate 231 and the side of the connecting plate 23 are movably fitted together. A circular frame 24 is fixedly provided on the inner surface of the connecting plate 23. An adsorption plate 241 is fixedly provided on the inner surface of the circular frame 24. The adsorption plate 241 is composed of multiple adsorption layers. The materials of the multiple adsorption layers have been disclosed in the comparative case and are existing technologies, so they will not be described in detail. Nitrogen gas can be preliminarily dried by the refrigerated dryer 11 and then enters the dryer 12 through the connecting pipe 13 and is dried by the drying plate 123. The adsorption plate 241 can adsorb carbon dioxide, oxygen, and moisture in the nitrogen gas. A hollow plate 25 is fixedly provided on the lower surface of the fixed frame plate 22. A spring 27 is fixedly provided on the inner surface of the hollow plate 25. A sliding plate 28 is fixedly mounted on the upper end of the 27, and a movable rod 26 is fixedly mounted on the middle of the sliding plate 28. An insertion slot 29 is opened on one side of the fixed frame plate 22, and the movable rod 26 movably passes through the hollow plate 25 and the insertion slot 29. A connecting cylinder 291 is fixedly mounted on one side of the fixed plate 231, and the connecting cylinder 291 is movably inserted into the insertion slot 29. The upper end of the movable rod 26 is movably inserted into the connecting cylinder 291. When the adsorption plate 241 needs to be replaced, it can be replaced by pulling the movable rod 26. The movable rod 26 is disengaged from the connecting cylinder 291. Then, the fixed plate 231 can be moved through the pull port 232 to disengage the adsorption plate 241 from the dryer 12. The connecting plate 23 with the new adsorption plate 241 can be inserted into the fixed frame plate 22, and the connecting cylinder 291 can be inserted into the insertion port 29. Then, the movable rod 26 can be released and the end of the movable rod 26 can be inserted into the connecting cylinder 291 by the force of the spring 27, which facilitates the replacement of the adsorption plate 241 and can improve the adsorption efficiency.

[0024] The fixed plate 231 has a pull opening 232 on one side. The pull opening 232 has a concave cross-sectional shape, which facilitates the movement of the fixed plate 231. The movable rod 26 has a T-shaped cross-sectional shape, which facilitates both pulling the movable rod 26 and connection. There are eight springs 27, and the springs 27 are arrayed between the inner surface of the hollow plate 25 and the slide plate 28. By setting multiple springs 27, the stability after connection can be improved.

[0025] The sealing assembly 4 includes an annular groove 41, which is formed on one side of the flange 122. A sealing airbag 42 is fixedly provided on the inner surface of the annular groove 41, and a duct 43 is fixedly provided on the outer surface of the sealing airbag 42. The duct 43 passes through the flange 122, and a screw cap 44 is threaded to the upper end of the duct 43. After the duct is connected to the outlet pipe 121, the end of the duct can be disengaged from the protective plate 46 by rotating the bolt 47. After rotating the protective plate 46, the screw cap 44 is exposed. After rotating the screw cap 44, the duct can be disengaged from the duct 43. Then, air can be pumped into the duct 43 by a tool, which can cause the sealing airbag 42 to expand. The expanded sealing airbag 42 can fill the gap between the flange 122 and the duct, thereby improving the sealing performance and reducing the possibility of leakage.

[0026] A fixed housing 45 is fixedly provided on the outer surface of the flange 122. A protective plate 46 is rotatably provided on the fixed housing 45. A bolt 47 is threaded into the protective plate 46. The end of the bolt 47 is threaded into the protective plate 46. The ends of the swivel cap 44 and the air guide pipe 43 are both located inside the fixed housing 45, which facilitates the protection of the end of the air guide pipe 43 and the swivel cap 44. The air guide pipe 43 and the swivel cap 44 are connected by internal and external threads, which facilitates the connection between the swivel cap 44 and the air guide pipe 43. The outer surface of the air guide pipe 43 is provided with external threads, and the inner surface of the swivel cap 44 is provided with internal threads.

[0027] Working principle: When using this utility model, after the conduit is connected to the air outlet pipe 121, the end of the conduit can be disengaged from the protective plate 46 by rotating the bolt 47. After rotating the protective plate 46, the cap 44 will be exposed. After rotating the cap 44, the conduit can be disengaged from the air duct 43. Then, air can be pumped into the air duct 43 by a tool, which will cause the sealing airbag 42 to expand. The expanded sealing airbag 42 can fill the gap between the flange 122 and the conduit, thereby improving the sealing performance and reducing the possibility of air leakage.

[0028] Nitrogen gas undergoes preliminary drying in the refrigerated dryer 11 and then enters the dryer 12 through the connecting pipe 13. It is then dried by the drying plate 123. The adsorption plate 241 adsorbs carbon dioxide, oxygen, and moisture from the nitrogen gas. When the adsorption plate 241 needs to be replaced, the end of the movable rod 26 can be pulled out of the connecting cylinder 291. Then, the fixed plate 231 can be moved through the pull port 232 to remove the adsorption plate 241 from the dryer 12. The connecting plate 23 with the new adsorption plate 241 can be inserted into the fixed frame plate 22, and the connecting cylinder 291 can be inserted into the insertion port 29. After that, the movable rod 26 can be released, and the end of the movable rod 26 can be inserted into the connecting cylinder 291 by the force of the spring 27. This facilitates the replacement of the adsorption plate 241 and improves the adsorption efficiency.

[0029] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A nitrogen drying apparatus for nitrogen preparation, comprising a base (1), characterized in that: The upper surface of the base (1) is symmetrically provided with a refrigerated dryer (11) and a dryer (12). A connecting pipe (13) is provided between the refrigerated dryer (11) and the dryer (12). A drying plate (123) is provided inside the dryer (12). An air outlet pipe (121) is provided on the outer surface of the dryer (12). A flange (122) is fixedly provided at the other end of the air outlet pipe (121). A sealing assembly (4) is connected to the flange (122). An auxiliary replacement assembly (2) is connected to the outer surface of the dryer (12). The auxiliary replacement component (2) includes a side opening (21) and a connecting plate (23). The side opening (21) is located on the outer surface of the dryer (12). A fixing frame plate (22) is fixedly provided on the outer surface of the dryer (12). A fixing plate (231) is fixedly provided on one side of the connecting plate (23). The fixing plate (231) is movably fitted to the side of the connecting plate (23). A circular frame (24) is fixedly provided on the inner surface of the connecting plate (23). An adsorption plate (241) is fixedly provided on the inner surface of the circular frame (24). A hollow plate is fixedly provided on the lower surface of the fixing frame plate (22). (25) A spring (27) is fixedly provided on the inner surface of the hollow plate (25). A sliding plate (28) is fixedly provided on the upper end of the spring (27). A movable rod (26) is fixedly provided in the middle of the sliding plate (28). An insertion port (29) is opened on one side of the fixed frame plate (22). The movable rod (26) moves through the hollow plate (25) and the insertion port (29). A connecting tube (291) is fixedly provided on one side of the fixed plate (231). The connecting tube (291) is movably inserted into the insertion port (29). The upper end of the movable rod (26) is movably inserted into the inside of the connecting tube (291).

2. The nitrogen drying apparatus for nitrogen preparation as described in claim 1, characterized in that, The sealing assembly (4) includes an annular groove (41) which is formed on one side of the flange (122). A sealing airbag (42) is fixedly provided on the inner surface of the annular groove (41), and a duct (43) is fixedly provided on the outer surface of the sealing airbag (42). The duct (43) passes through the flange (122), and a screw cap (44) is threaded to the upper end of the duct (43).

3. The nitrogen drying apparatus for nitrogen preparation as described in claim 1, characterized in that, The fixing plate (231) has a pull opening (232) on one side, and the cross-sectional shape of the pull opening (232) is "concave".

4. The nitrogen drying apparatus for nitrogen preparation as described in claim 1, characterized in that, The cross-sectional shape of the movable rod (26) is "T".

5. A nitrogen drying apparatus for nitrogen preparation as described in claim 1, characterized in that, The springs (27) are provided in eight arrays, and the springs (27) are distributed between the inner surface of the hollow plate (25) and the slide plate (28).

6. A nitrogen drying apparatus for nitrogen preparation as described in claim 2, characterized in that, A fixed shell (45) is fixedly provided on the outer surface of the flange (122). A protective plate (46) is rotatably provided on the fixed shell (45). A bolt (47) is threadedly inserted into the protective plate (46), and the end of the bolt (47) is threadedly inserted into the protective plate (46).

7. A nitrogen drying apparatus for nitrogen preparation as described in claim 6, characterized in that, The ends of the cap (44) and the air duct (43) are both located inside the fixed shell (45).

8. A nitrogen drying apparatus for nitrogen preparation as described in claim 2, characterized in that, The air guide tube (43) and the nut (44) are connected by internal and external threads.

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