Environment-friendly rectification device for oxygen preparation

Abstract

The utility model discloses an environment-friendly rectification device for oxygen preparation, which comprises a filter box, a gas film separation box, a rectification tank and a fixing frame, one side of the bottom of the inner cavity of the filter box is communicated and provided with a gas inlet pipe, the gas inlet pipe is provided with a gas inlet pump, and a first connecting pipe is communicated and arranged between the filter box and the inner cavity of the gas film separation box. A second connecting pipe is installed between the gas film separation box and the rectification tank in a communicating mode, a gas conveying pump is installed on the second connecting pipe, a rotating shaft is installed in the center of an inner cavity of the filtering box, the top end of the rotating shaft is connected with the output end of a servo motor, and three partition plates are evenly and fixedly installed on the rotating shaft; and mounting frames are fixedly mounted on the inner walls of the three partition plates. The device disclosed by the utility model has the beneficial effects that the device is provided with the filter box, the gas film separation box and the rectification tank, so that the graphite filter layer, the water absorption filter layer and the cotton filter layer can be quickly replaced and mounted on the premise of not stopping the rectification tank, the working efficiency is higher, and the practicability is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen preparation, in particular to an environmentally friendly distillation device for oxygen preparation. Background Art

[0002] High-purity oxygen is a colorless, odorless, and tasteless gas. Distillation is a separation process that uses the different volatilities of the components in a mixture to separate them. Commonly used equipment includes plate distillation towers and packed distillation towers. In the oxygen production process, distillation equipment is often used to separate the nitrogen and oxygen mixed gas to improve the purity of the oxygen production. The pure oxygen produced can be used in metallurgy, medical treatment and other production and life, and is widely used.

[0003] The prior art discloses a distillation device for preparing oxygen with publication number CN219185874U, which belongs to the field of distillation devices for preparing oxygen. A distillation device for preparing oxygen comprises: a filter box, the filter box is connected to a gas membrane separation box via a connecting pipe 1, and the gas membrane separation box is connected to a distillation tank via a connecting pipe 2; in the utility model, impurities and harmful substances in the air can be filtered by setting the filter box, a gas separation membrane is set in the gas membrane separation box, and the permeation speed of different gases is different. With the help of the difference in permeation speed, some gases are blocked from entering the distillation tank, thereby improving the oxygen separation speed in the distillation tank, and regular packing tower plates and bulk packing tower plates and multiple groups of bubble tower plates set in opposite directions are set in the packing tower plate so that the air and liquid are fully in contact with each other to exchange heat, thereby ensuring the effect of nitrogen and oxygen separation. The utility model has the characteristics of simple structure and easy operation, and accelerates the oxygen separation speed.

[0004] When in use, the above utility model utilizes the provided graphite filter layer, water absorption filter layer and cotton filter layer to first filter impurities and harmful substances from the air before distillation. The provided graphite filter layer, water absorption filter layer and cotton filter layer are fixedly installed in the filter box. After a period of use, the dirty or failed graphite filter layer, water absorption filter layer and cotton filter layer need to be replaced. However, the replacement operation is relatively cumbersome, and the distillation tank needs to be shut down for replacement, thereby reducing the oxygen preparation efficiency, and its practicality is relatively general. Utility Model Content

[0005] (1) Technical problems solved

[0006] In response to the shortcomings of the existing technology, the utility model provides an environmentally friendly distillation device for oxygen preparation, which can quickly complete the replacement and installation of the graphite filter layer, the water absorption filter layer and the cotton filter layer without stopping the operation of the distillation tank, and has the advantages of higher work efficiency and greater practicality, thereby solving the problems in the above-mentioned background technology.

[0007] (2) Technical solution

[0008] To achieve the advantages of being able to quickly complete the replacement and installation of the graphite filter layer, water absorption filter layer, and cotton filter layer without stopping the operation of the rectification tank, with higher work efficiency and stronger practicability, the specific technical solution adopted by the present utility model is as follows: An environment-friendly rectification device for oxygen preparation, including a filter box, a gas membrane separation box, a rectification tank, and a fixing frame. One side of the bottom of the inner cavity of the filter box is connected and installed with an air inlet pipe, and an air inlet pump is installed on the air inlet pipe. A first connecting pipe is connected and installed between the inner cavities of the filter box and the gas membrane separation box. A second connecting pipe is connected and installed between the gas membrane separation box and the rectification tank, and a gas transmission pump is installed on the second connecting pipe. A rotating shaft is installed in the center of the inner cavity of the filter box, and the top end of the rotating shaft is connected to the output end of a servo motor. Three partition plates are evenly and fixedly installed on the rotating shaft. Installation frames are fixedly installed on the inner walls of the three partition plates, and limiting installation grooves are respectively opened in the centers of the inner sides of the installation frames. A graphite filter layer, a water absorption filter layer, and a cotton filter layer are respectively fixedly installed on the three fixing frames. Connecting rods are fixedly installed between adjacent fixing frames. One ends of the three fixing frames are clamped and installed in the limiting installation grooves. A replacement opening is opened on one side of the top surface of the inner cavity of the filter box, and a sector-shaped sealing cover is connected and installed on the replacement opening through a hinge. A handle is installed on the sector-shaped sealing cover.

[0009] Further, a plurality of gas separation membranes are fixedly installed in the inner cavity of the gas membrane separation box, and an exhaust pipe is connected and installed on one side of the bottom of the inner cavity of the gas membrane separation box.

[0010] Further, a condensation evaporator is fixedly installed in the center of the inner cavity of the rectification tank. A structured packing tray and a random packing tray fixedly installed in the rectification pipe are arranged below the condensation evaporator. An upper packing tray and several bubble cap trays fixedly installed in the rectification pipe are arranged above the condensation evaporator. A liquid nitrogen tank is installed below the condensation evaporator. One end of a first return pipe is connected and installed on one side of the inner cavity of the liquid nitrogen tank, and the other end of the first return pipe is connected and communicated with the top of the inner cavity of the rectification tank. A liquid nitrogen pump is installed on the first return pipe. One end of a second return pipe is connected and communicated with the bottom of the inner cavity of the rectification tank, and the other end of the second return pipe is connected and communicated with the middle part of the inner cavity of the rectification tank. A reboiler and an air flow valve are installed on the second return pipe.

[0011] Further, a nitrogen outlet pipe is connected and installed in the center of the top of the inner cavity of the rectification tank, and an oxygen outlet pipe is connected and installed on one side of the middle part of the inner cavity of the rectification tank.

[0012] Further, a control panel is installed on the outer wall of the rectification tank, and the control panel is electrically connected to the air inlet pump, the gas transmission pump, the servo motor, the condensation evaporator, the liquid nitrogen pump, the reboiler, and the air flow valve.

[0013] Further, a pull ring is fixedly installed on one side of the top of the fixing frame.

[0014] Furthermore, a support frame is fixedly installed at the bottom of the rectification tank.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present utility model provides an environment-friendly rectification device for oxygen preparation, which has the following beneficial effects:

[0017] The present utility model is provided with a filter box, a gas membrane separation box and a rectification tank. During use, the air inlet pump installed on the air inlet pipe is started to pump air into the inner cavity of the filter box. A rotating shaft is installed in the inner cavity of the filter box, and three partition plates are evenly and fixedly installed on the rotating shaft. Mounting frames are fixedly installed on the partition plates, and a limit mounting groove is formed in the center of the inner wall of the mounting frame. On the other hand, three fixing frames are respectively installed with a graphite filter layer, a water-absorbing filter layer and a cotton filter layer, and connecting rods are connected and installed between adjacent fixing frames. During installation, workers can open the sector-shaped sealing cover installed through a hinge on the replacement port, and then place the fixing frame in the limit mounting groove. After installation, the sector-shaped sealing cover is closed, and then the rotating shaft is driven to rotate by a servo motor, so that the fixing frames installed with the graphite filter layer, the water-absorbing filter layer and the cotton filter layer rotate to the side of the air inlet pipe along with the mounting frame and the rotating shaft, so that the air can pass through the graphite filter layer, the water-absorbing filter layer and the cotton filter layer to filter impurities and harmful substances. Then, the filtered air is input into the inner cavity of the gas membrane separation box through the first connecting pipe. When it is necessary to replace the graphite filter layer, the water-absorbing filter layer and the cotton filter layer, as described above, the user can directly open the sector-shaped sealing cover, place the fixing frame in the vacant mounting frame on the other side, and then rotate the rotating shaft again to move the unused graphite filter layer, the water-absorbing filter layer and the cotton filter layer to the side of the air inlet pipe. When the used graphite filter layer, the water-absorbing filter layer and the cotton filter layer move to the side of the replacement port, the used graphite filter layer, the water-absorbing filter layer and the cotton filter layer can be taken out for replacement. During this process, the replacement and installation of the graphite filter layer, the water-absorbing filter layer and the cotton filter layer can be quickly completed without stopping the operation of the rectification tank, with higher working efficiency and stronger practicability. The filtered air in the inner cavity of the gas membrane separation box is separated into relatively pure oxygen and nitrogen through the gas separation membrane, and then is introduced into the rectification tank through the gas transmission pump installed on the second connecting pipe. Nitrogen and oxygen are rectification-separated in the rectification tank through the condensate evaporator, structured packing trays, random packing trays, a plurality of bubble cap trays and upper packing trays arranged therein. The obtained pure oxygen is led out through the oxygen outlet pipe, and the separated nitrogen is led out through the nitrogen outlet pipe, and the liquid nitrogen generated is subjected to cyclic rectification through the liquid nitrogen tank, the first return pipe and the liquid nitrogen pump. The oxygen is subjected to cyclic rectification through the second return pipe, the reboiler and the air flow valve to improve the separation effect of oxygen and nitrogen and the purity quality of the prepared oxygen. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of an environment-friendly rectification device for oxygen preparation according to an embodiment of the present invention;

[0020] Figure 2 It is a top-down sectional view of the filter box of the environment-friendly rectification device for oxygen preparation according to an embodiment of the present invention;

[0021] Figure 3 It is a top view of the filter box of the environment-friendly rectification device for oxygen preparation according to an embodiment of the present invention;

[0022] Figure 4 is according to an embodiment of the present invention Figure 1 The enlarged view of part A;

[0023] Figure 5 It is a three-dimensional view of the graphite filter layer, water-absorbing filter layer and cotton filter layer of the environment-friendly rectification device for oxygen preparation according to an embodiment of the present invention.

[0024] In the figure:

[0025] 1. Intake pump; 2. Filter box; 3. Rotating shaft; 4. Mounting frame; 5. Replacement port; 6. First connecting pipe; 7. Gas membrane separation box; 8. Gas separation membrane; 9. Exhaust pipe; 10. Support frame; 11. Rectification tank; 12. Reboiler; 13. Inlet pipe; 14. Graphite filter layer; 15. Water-absorbing filter layer; 16. Cotton filter layer; 17. Servo motor; 18. Handle; 19. Sector-shaped sealing cover; 20. Air delivery pump; 21. Second connecting pipe; 22. Condensing evaporator; 23. Oxygen outlet pipe; 24. Bubble cap tray; 25. Upper packing tray; 26. Nitrogen outlet pipe; 27. Liquid nitrogen pump; 28. First reflux pipe; 29. Liquid nitrogen tank; 30. Bulk packing tray; 31. Air flow valve; 32. Structured packing tray; 33. Second reflux pipe; 34. Partition board; 35. Fixed frame; 36. Pull ring; 37. Hinge; 38. Connecting rod; 39. Limit installation groove. Detailed implementation manners

[0026] To further illustrate each embodiment, the present utility model provides attached drawings, which are part of the disclosure of the present utility model. They are mainly used to illustrate the embodiments and can be combined with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0027] According to an embodiment of the present utility model, an environment-friendly rectification device for oxygen preparation is provided.

[0028] Now, the present utility model will be further described in conjunction with the attached drawings and specific implementation manners. As Figures 1-5 shown, the environment-friendly rectification device for oxygen preparation according to an embodiment of the present utility model includes a filtration box 2, a gas membrane separation box 7, a rectification tank 11, and a fixing frame 35. One side of the bottom inside the filtration box 2 is connected and installed with an air inlet pipe 13, and an air inlet pump 1 is installed on the air inlet pipe 13. A first connecting pipe 6 is connected and installed between the inside of the filtration box 2 and the inside of the gas membrane separation box 7. A second connecting pipe 21 is connected and installed between the gas membrane separation box 7 and the rectification tank 11, and an air delivery pump 20 is installed on the second connecting pipe 21. A rotating shaft 3 is installed in the center of the inside of the filtration box 2, and the top end of the rotating shaft 3 is connected to the output end of a servo motor 17. Three partition plates 34 are evenly and fixedly installed on the rotating shaft 3. Installation frames 4 are fixedly installed on the inner walls of the three partition plates 34, and a limit installation groove 39 is formed in the center of the inner side of each installation frame 4. A graphite filtration layer 14, a water absorption filtration layer 15, and a cotton filtration layer 16 are respectively fixedly installed on the three fixing frames 35. Connecting rods 38 are fixedly installed between adjacent fixing frames 35. One end of the three fixing frames 35 is clamped and installed in the limit installation groove 39. A replacement opening 5 is formed on one side of the top surface inside the filtration box 2, and a sector-shaped sealing cover 19 is connected and installed on the replacement opening 5 through a hinge 37, and a handle 18 is installed on the sector-shaped sealing cover 19, which can quickly complete the replacement and installation of the graphite filtration layer 14, the water absorption filtration layer 15, and the cotton filtration layer 16 without stopping the operation of the rectification tank 11, with higher work efficiency and stronger practicability.

[0029] In one embodiment, a plurality of gas separation membranes 8 are fixedly installed inside the gas membrane separation box 7, and an exhaust pipe 9 is connected and installed on one side of the bottom inside the gas membrane separation box 7, which serves to separate oxygen and nitrogen in the filtered air from other gases.

[0030] In one embodiment, a condensation evaporator 22 is fixedly installed in the center of the inner cavity of the rectification tank 11. Below the condensation evaporator 22, there are a structured packing tray 32 and a random packing tray 30 fixedly installed in the inner cavity of the rectification pipe. Above the condensation evaporator 22, there are an upper packing tray 25 and several bubble cap trays 24 fixedly installed in the inner cavity of the rectification pipe. A liquid nitrogen tank 29 is installed below the condensation evaporator 22. One end of a first return pipe 28 is communicatively connected to one side of the inner cavity of the liquid nitrogen tank 29, and the other end of the first return pipe 28 is communicatively connected to the top of the inner cavity of the rectification tank 11. A liquid nitrogen pump 27 is installed on the first return pipe 28. One end of a second return pipe 33 is communicatively connected to the bottom of the inner cavity of the rectification tank 11, and the other end of the second return pipe 33 is communicatively connected to the middle of the inner cavity of the rectification tank 11. A reboiler 12 and an air flow valve 31 are installed on the second return pipe 33, which improves the separation effect of oxygen and nitrogen and improves the purity quality of the prepared oxygen.

[0031] In one embodiment, a nitrogen outlet pipe 26 is communicatively connected to the center of the top of the inner cavity of the rectification tank 11, and an oxygen outlet pipe 23 is communicatively connected to one side of the middle of the inner cavity of the rectification tank 11, which serves to export the oxygen and nitrogen separated by rectification.

[0032] In one embodiment, a control panel is installed on the outer wall of the rectification tank 11, and the control panel is electrically connected to the intake pump 1, the gas transmission pump 20, the servo motor 17, the condensation evaporator 22, the liquid nitrogen pump 27, the reboiler 12, and the air flow valve 31, which serves to control the normal operation of the device.

[0033] In one embodiment, a pull ring 36 is fixedly installed on one side of the top of the fixed frame 35, which serves to facilitate the user to pick up, place, and move the fixed frame 35.

[0034] In one embodiment, a support frame 10 is fixedly installed at the bottom of the rectification tank 11, which serves to provide fixed support.

[0035] Working principle: The utility model is provided with a filtering box 2, a gas film separation box 7 and a rectifying tank 11. When in use, the air inlet pump 1 installed on the air inlet pipe 13 is started to pump air into the inner cavity of the filtering box 2. A rotating shaft 3 is installed in the inner cavity of the filtering box 2, and three partition plates 34 are evenly and fixedly installed on the rotating shaft 3. An installation frame 4 is fixedly installed on the partition plate 34, and a limiting installation groove 39 is opened in the center of the inner wall of the installation frame 4. On the other hand, three fixing frames 35 are provided, and a graphite filtering layer 14, a water absorption filtering layer 15 and a cotton filtering layer 16 are respectively installed. Connecting rods 38 are connected and installed between adjacent fixing frames 35. During installation, the worker can open the sector-shaped sealing cover 19 installed on the replacement port 5 through the hinge 37, and then place the fixing frame 35 in the limiting installation groove 39. After installation, the sector-shaped sealing cover 19 is closed, and then the rotating shaft 3 is driven to rotate by the servo motor 17, so that the fixing frames 35 installed with the graphite filtering layer 14, the water absorption filtering layer 15 and the cotton filtering layer 16 rotate to the side of the air inlet pipe 13 along with the installation frame 4 and the rotating shaft 3, so that the air can pass through the graphite filtering layer 14, the water absorption filtering layer 15 and the cotton filtering layer 16 to filter impurities and harmful substances. Then the filtered air is input into the inner cavity of the gas film separation box 7 through the first connecting pipe 6. When it is necessary to replace the graphite filtering layer 14, the water absorption filtering layer 15 and the cotton filtering layer 16, as described above, the user can directly open the sector-shaped sealing cover 19, place the fixing frame 35 into the empty installation frame 4 on the other side, and then rotate the rotating shaft 3 again to move the unused graphite filtering layer 14, the water absorption filtering layer 15 and the cotton filtering layer 16 to the side of the air inlet pipe 13. When the used graphite filtering layer 14, the water absorption filtering layer 15 and the cotton filtering layer 16 move to the side of the replacement port 5, the used graphite filtering layer 14, the water absorption filtering layer 15 and the cotton filtering layer 16 can be taken out for replacement. During this process, the replacement and installation of the graphite filtering layer 14, the water absorption filtering layer 15 and the cotton filtering layer 16 can be quickly completed without stopping the work of the rectifying tank 11, with higher work efficiency and stronger practicability. The filtered air in the inner cavity of the gas film separation box 7 is separated into relatively pure oxygen and nitrogen through the gas separation membrane 8, and then is introduced into the rectifying tank 11 through the gas transmission pump 20 installed on the second connecting pipe 21. Nitrogen and oxygen are rectified and separated in the rectifying tank 11 through the condensate evaporator 22, the structured packing tray 32, the random packing tray 30, a plurality of bubble cap trays 24 and the upper packing tray 25. The obtained pure oxygen is led out through the oxygen outlet pipe 23, and the separated nitrogen is led out through the nitrogen outlet pipe 26, and the liquid nitrogen generated is subjected to cyclic rectification through the liquid nitrogen tank 29, the first return pipe 28 and the liquid nitrogen pump 27. The oxygen is subjected to cyclic rectification through the second return pipe 33, the reboiler 12 and the air flow valve 31 to improve the separation effect of oxygen and nitrogen and improve the purity quality of the prepared oxygen.

[0036] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "setting", "connection", "fixation", "swivel connection" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An environmentally friendly rectification device for oxygen preparation, comprising a filtration box (2), a gas membrane separation box (7), a rectification tank (11) and a fixing frame (35), characterized in that, One side of the bottom inside the filtering box (2) is connected and installed with an air inlet pipe (13), and an air inlet pump (1) is installed on the air inlet pipe (13). A first connecting pipe (6) is connected and installed between the inside of the filtering box (2) and the inside of the gas film separation box (7). A second connecting pipe (21) is connected and installed between the gas film separation box (7) and the rectifying tank (11), and a gas transmission pump (20) is installed on the second connecting pipe (21). A rotating shaft (3) is installed in the center of the inside of the filtering box (2), and the top end of the rotating shaft (3) is connected to the output end of a servo motor (17). Three partition plates (34) are evenly and fixedly installed on the rotating shaft (3). Mounting frames (4) are fixedly installed on the inner walls of the three partition plates (34), and a limit mounting groove (39) is formed in the center of the inner side of each mounting frame (4). A graphite filtering layer (14), a water absorption filtering layer (15), and a cotton filtering layer (16) are respectively fixedly installed on the three fixing frames (35). Connecting rods (38) are fixedly installed between adjacent fixing frames (35). One ends of the three fixing frames (35) are snap-fitted into the limit mounting grooves (39). One side of the top surface inside the filtering box (2) is provided with a replacement opening (5), and a sector-shaped sealing cover (19) is connected and installed on the replacement opening (5) through a hinge (37). A handle (18) is installed on the sector-shaped sealing cover (19).

2. The environmentally friendly rectification device for oxygen preparation according to claim 1, characterized in that, A plurality of gas separation membranes (8) are fixedly installed inside the gas film separation box (7). One side of the bottom inside the gas film separation box (7) is connected and installed with an exhaust pipe (9).

3. The environmentally friendly rectification device for oxygen preparation according to claim 1, characterized in that, A condensation evaporator (22) is fixedly installed in the center of the inside of the rectifying tank (11). Below the condensation evaporator (22), a structured packing tray (32) and a random packing tray (30) fixedly installed inside the rectifying pipe are provided. Above the condensation evaporator (22), an upper packing tray (25) and a plurality of bubble cap trays (24) fixedly installed inside the rectifying pipe are provided. A liquid nitrogen tank (29) is installed below the condensation evaporator (22). One end of a first reflux pipe (28) is connected and installed on one side of the inside of the liquid nitrogen tank (29), and the other end of the first reflux pipe (28) is connected and communicated with the top inside the rectifying tank (11). A liquid nitrogen pump (27) is installed on the first reflux pipe (28). One end of a second reflux pipe (33) is connected and communicated with the bottom inside the rectifying tank (11), and the other end of the second reflux pipe (33) is connected and communicated with the middle part inside the rectifying tank (11). A reboiler (12) and an air flow valve (31) are installed on the second reflux pipe (33).

4. The environmentally friendly rectification device for oxygen preparation according to claim 1, characterized in that, A nitrogen outlet pipe (26) is connected and installed in the center of the top inside the rectifying tank (11). An oxygen outlet pipe (23) is connected and installed on one side of the middle part inside the rectifying tank (11).

5. The environmentally friendly rectification device for oxygen preparation according to claim 1, characterized in that, A control panel is installed on the outer wall of the rectifying tank (11), and the control panel is electrically connected to the air inlet pump (1), the gas transmission pump (20), the servo motor (17), the condensation evaporator (22), the liquid nitrogen pump (27), the reboiler (12), and the air flow valve (31).

6. The environmentally friendly rectification device for oxygen preparation according to claim 1, characterized in that, A pull ring (36) is fixedly installed on one side of the top of the fixing frame (35).

7. The environmentally friendly rectification device for oxygen preparation according to claim 1, wherein, The bottom of the rectifying tank (11) is fixedly installed with a support frame (10).

Images