High-purity oxygen production adsorption tower

Abstract

The invention relates to the technical field of molecular sieve oxygen production, and discloses a high-purity oxygen production adsorption tower which comprises a tower body, partition plates distributed in the vertical direction are fixed in the tower body, an air inlet cavity and a plurality of oxygen production cavities are defined by the partition plates and the tower body, and horizontal oxygen production inlet pipes are fixed in the oxygen production cavities; the oxygen generation net rack is arranged outside the oxygen generation inlet pipe in a sleeving manner; the rotating assembly is used for driving each oxygen generation net rack to rotate; a communication assembly and a nitrogen extraction assembly. According to the high-purity oxygen production adsorption tower, all the oxygen production cavities are sequentially communicated through the communicating assemblies, so that compressed air is discharged through the oxygen production inlet pipe and then makes contact with the oxygen production molecular sieve in the storage cavity, the nitrogen content in the compressed air is continuously reduced, and finally the concentration of oxygen discharged from the air outlet is increased; each oxygen generation net rack is driven by the rotating assembly to rotate, so that the oxygen generation molecular sieves at all positions can fully absorb nitrogen in compressed air discharged from the oxygen generation inlet, the consistent adsorption quantity of the nitrogen generation molecular sieves at all positions is ensured, and the concentration of discharged oxygen is further improved on the basis of reducing the difference.

Description

Technical Field

[0001] The invention relates to the technical field of molecular sieve oxygen production, in particular to a high-purity oxygen production adsorption tower. Background Art

[0002] Molecular sieve oxygen production technology is an oxygen production method based on the principle of pressure swing adsorption (PSA). Its working principle is to selectively adsorb air through molecular sieves to effectively remove nitrogen, thereby collecting high-purity nitrogen. In addition, a Chinese invention patent with announcement number CN118161954B discloses a high-purity oxygen generation component, which integrates a nitrogen absorption chamber, a buffer chamber and an oxygen absorption chamber into an adsorption shell to reduce the occupied space and reduce costs. The connection and disconnection between the chambers are controlled by an on-off component. First, most of the nitrogen is absorbed by the nitrogen-absorbing molecular sieve, and then the oxygen-absorbing molecular sieve absorbs the mixed gas with reduced nitrogen concentration and increased oxygen concentration. After the oxygen-absorbing molecular sieve reaches saturation, the absorbed mixed gas is extracted to produce higher purity oxygen.

[0003] In the above two oxygen production methods, the molecular sieves are fixed in the adsorption tower, which leads to that the adsorption efficiency of the molecular sieve near the compressed air inlet in the early stage is significantly higher than that of the molecular sieve far from the compressed air inlet, so that the molecular sieve near the compressed air inlet is easy to reach saturation state before the molecular sieve far from the compressed air inlet due to excessive adsorption, that is, generally speaking, the closer to the compressed air inlet, the easier it is to reach saturation state, while the remaining part of the molecular sieve can continue to adsorb, resulting in obvious differences in the adsorption state of the molecular sieves at various locations when the adsorption tower is running, and one part of it is easy to be oversaturated. After the part is oversaturated, it is easy to release the adsorbed gas, which affects the operating state of the remaining part of the molecular sieve, and finally affects the oxygen concentration at the exhaust port of the adsorption tower; in addition, the molecular sieve has a certain service life. When the number of regenerations reaches a certain number, the molecular sieve in the adsorption tower needs to be replaced. In the prior art, it is usually necessary to disassemble the adsorption tower accordingly, discharge the expired molecular sieve, and then add a new molecular sieve, which makes the replacement and replenishment of the molecular sieve and other related operations extremely troublesome and difficult.

[0004] Therefore, it is necessary to improve the oxygen production adsorption tower in the prior art. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects in the prior art and provide a high-purity oxygen production adsorption tower which ensures the consistency of the running state of the molecular sieve and facilitates the replacement and replenishment of the molecular sieve.

[0006] In order to achieve the above technical effects, the technical solution of the present invention is: a high-purity oxygen production adsorption tower, comprising: A tower body, wherein the tower body is a hollow structure, an air inlet and an air outlet are respectively arranged at the top and the bottom of the tower body, the air inlet and the air outlet are respectively connected with an air inlet valve and an air outlet valve, a partition plate distributed along a vertical direction is fixed in the tower body, the partition plate and the tower body are enclosed to form an air inlet cavity and a plurality of oxygen-making cavities distributed below the air inlet cavity along a vertical direction, the air inlet is communicated with the air inlet cavity, the air outlet is communicated with the oxygen-making cavity at the bottom, a horizontal oxygen-making inlet pipe is fixed in the oxygen-making cavity, the side wall of the oxygen-making inlet pipe is provided with an oxygen-making inlet, and the aperture of the oxygen-making inlet is smaller than the aperture of the outer diameter of the oxygen-making molecular sieve; An oxygen-generating grid frame, wherein the oxygen-generating grid frame is coaxially sleeved outside the oxygen-generating inlet pipe and is located in the air inlet cavity, the oxygen-generating grid frame is densely covered with oxygen-generating outlets having a pore size smaller than the outer diameter of the oxygen-generating molecular sieve, the oxygen-generating grid frame rotates on the oxygen-generating inlet pipe around its own center line, and the oxygen-generating grid frame divides the oxygen-generating cavity into a storage cavity and an oxygen-enriching cavity, the inner cavity of the oxygen-generating inlet pipe, the oxygen-generating inlet, the storage cavity, the oxygen-generating outlet and the oxygen-enriching cavity are sequentially connected, and the storage cavity is used to store the oxygen-generating molecular sieve; A rotating assembly, wherein the rotating assembly drives each oxygen-generating grid frame to rotate with the axis of the oxygen-generating inlet pipe as the center line; A connecting component and a nitrogen extraction component, wherein the connecting component is used to connect the air inlet chamber with the inner cavity of the oxygen production inlet pipe located at the top and to connect the oxygen-enriched chamber at a high position in the adjacent oxygen production chamber with the inner cavity of the oxygen production inlet pipe that conflicts with it, and the nitrogen extraction component includes a negative pressure pump, and the input end of the negative pressure pump is connected to the oxygen-enriched chamber.

[0007] Preferably, in order to facilitate the compressed air to pass through the air inlet chamber and each oxygen production chamber in sequence during oxygen production, the two inner side walls facing the tower body are provided with docking through holes distributed in the vertical direction, and the docking through holes include a first through hole, a second through hole and a third through hole. The first through hole is connected to the air inlet chamber, and the second through hole is fixedly connected to the end of the oxygen production inlet pipe. In two adjacent oxygen production chambers, the third through hole is connected to the oxygen-enriched chamber corresponding to the upper oxygen production chamber and the second through hole corresponding to the lower oxygen production chamber through a connecting component.

[0008] Preferably, in order to simplify the structure and facilitate assembly and splicing, the connecting component includes a connecting main pipe extending in the vertical direction and connecting branch pipes distributed side by side in the vertical direction, the connecting main pipe is connected to the connecting branch pipe, and one end of the connecting branch pipe away from the connecting main pipe is connected to the docking through hole in a one-to-one correspondence, and an oxygen-making one-way valve is arranged in the connecting branch pipe corresponding to the second through hole, and an air intake one-way valve and a sealing block distributed at intervals in the vertical direction are also arranged in the connecting main pipe, each air intake one-way valve is arranged between two adjacent connecting branch pipes, each sealing block is arranged between two adjacent connecting branch pipes, and each connecting branch pipe except the end is located between adjacent oxygen-making one-way valves and sealing blocks.

[0009] Preferably, in order to facilitate the oxygen-producing molecular sieves in each oxygen-producing grid to discharge the adsorbed nitrogen at the same time after reaching a saturated state, the nitrogen extraction component includes a nitrogen extraction main pipe extending in the vertical direction and nitrogen extraction branches distributed in sequence along the vertical direction, the nitrogen extraction main pipe is connected to the input end of the negative pressure pump, and each nitrogen extraction branch pipe is connected one-to-one between the connecting branch pipe corresponding to the second through hole and the nitrogen extraction main pipe, the nitrogen extraction branch pipe is connected to a nitrogen extraction valve, and the nitrogen extraction branch pipe is located on the side of the oxygen production one-way valve away from the second through hole.

[0010] Preferably, in order to further promote the regeneration of the oxygen-producing molecular sieve, the tower body is further provided with purge through holes which are in one-to-one correspondence with the oxygen-enriched chambers, and the purge through holes are connected with purge valves and are used to introduce inert gas.

[0011] Preferably, in order to drive the oxygen production grid to rotate so that the adsorption state of the oxygen production molecular sieve in the storage chamber is consistent, the rotating assembly includes a driven gear ring coaxially sleeved on the outside of the oxygen production inlet pipe and fixedly connected to the oxygen production grid, a transmission gear rotating around its own axis in the oxygen-enriched chamber and meshing with the driven gear ring, a driving gear meshing with one of the transmission gears and located in the oxygen-enriched chamber, a rotating unit driving the driving gear to rotate, and a transmission unit arranged between two adjacent transmission gears, and the two adjacent transmission gears are connected in transmission through the transmission unit.

[0012] Preferably, in order to drive each transmission gear to rotate synchronously, the transmission unit includes two transmission wheels which are fixedly connected to the coaxial centerline of two adjacent transmission gears and located outside the oxygen production chamber, and a transmission connecting rod hinged between the two transmission wheels. The rotating assembly also includes a sealing cover, which is enclosed with the tower body to form a sealed cavity. The transmission connecting rod and the transmission wheel are both located in the sealed cavity. The transmission wheel and the transmission gear are fixedly connected via a transmission coaxial shaft, and the transmission coaxial shaft seal passes through the side wall of the tower body.

[0013] Preferably, in order to facilitate the discharge of expired oxygen-producing molecular sieves and the replenishment of oxygen-producing molecular sieves, one end of the oxygen-producing grid is provided with two inlets and outlets, the center line of the two inlets and outlets intersects perpendicularly with the axial line of the oxygen-producing inlet pipe and the intersection point is the midpoint of the center line, a sealing ring is fixed on the side wall of the tower body facing the two inlets and outlets, the sealing ring is provided with two connecting ports distributed in the vertical direction, and a feeding pipe and a discharging pipe corresponding to the two connecting ports and respectively located outside the tower body are fixed on the side wall of the tower body, the feeding pipe and the discharging pipe are respectively detachably and sealedly connected with a feeding plug and a discharging plug, and the movable path of the oxygen-producing grid includes a replacement station, at the replacement station, the feeding pipe is connected with one of the inlets and outlets through the connecting port located above, and the discharging pipe is connected with the other inlet and outlet through the connecting port located below.

[0014] Preferably, in order to facilitate the replacement of the oxygen-producing molecular sieve and ensure that the oxygen-producing grid is in the replacement position, a visual window is provided on the side wall of the sealing cover facing the transmission wheel, a replacement mark is provided on the visual window, and a hinge shaft is provided on the side of the transmission wheel adjacent to the visual window, and the end of the transmission connecting rod is hinged to the hinge shaft, and at the replacement position, the hinge shaft on at least one of the transmission wheels faces the replacement mark.

[0015] Preferably, in order to further ensure the consistency of the adsorption state of the oxygen-producing molecular sieve in the storage chamber, the oxygen-producing inlet is densely distributed at the bottom of the oxygen-producing inlet pipe, the oxygen-producing inlet is fixedly connected with a downward main fork tube, the main fork tube is fixedly connected with a branch tube distributed along the axial direction of the main fork tube, and the main fork tube and the branch tube are both provided with diversion holes, and the inner diameter of the diversion holes is smaller than the outer diameter of the oxygen-producing molecular sieve.

[0016] To sum up, compared with the prior art, the high-purity oxygen-producing adsorption tower of the present invention connects each oxygen-producing chamber in turn through a connecting component, so that the compressed air contacts the oxygen-producing molecular sieve in the storage chamber after being discharged through the oxygen-producing inlet pipe, thereby continuously reducing the nitrogen content in the compressed air, and finally increasing the oxygen concentration discharged from the air outlet. The rotating component drives each oxygen-producing grid to rotate, so that the oxygen-producing molecular sieves at each location can fully absorb the nitrogen in the compressed air discharged from the oxygen-producing inlet, thereby ensuring that the adsorption amount of the nitrogen-producing molecular sieves at each location is consistent, and further increasing the discharged oxygen concentration on the basis of reducing the difference. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the first embodiment; Figure 2 yes Figure 1 perspective drawing; Figure 3 yes Figure 1 Explosion diagram of Figure 4 yes Figure 1 A schematic cross-sectional structure diagram of ; Figure 5 yes Figure 4 A magnified view of part A; Figure 6 It is a structural schematic diagram of the tower body of the first embodiment; Figure 7 Schematic diagram of the connection structure between the oxygen production grid and the rotating assembly of the first embodiment; Figure 8 yes Figure 7 Explosion diagram of Fig. 9 2 is a schematic diagram of the connection structure between the communication component and the nitrogen extraction component of the first embodiment; Fig.10 yes Fig. 9 Explosion diagram of Fig.11 yes Fig. 9 A schematic cross-sectional structure diagram of ; Fig.12 is a schematic cross-sectional structure diagram of a tower body of the first embodiment; Fig.13 is another cross-sectional structural schematic diagram of the tower body of the first embodiment; Fig.14 is a schematic structural diagram of a second embodiment; Fig.15 is a side view of a second embodiment; Fig.16 is a schematic cross-sectional structure diagram of a tower body of a second embodiment; Fig.17 is a schematic cross-sectional structure diagram of the tower body of the second embodiment from another perspective; Fig.18 It is a schematic diagram of the partial connection structure of the rotating assembly, the oxygen production grid and the oxygen production inlet pipe of the second embodiment; Fig.19 yes Fig.18 Explosion diagram of Fig. 20 2 is a schematic diagram of the connection structure between the oxygen production grid and the oxygen production inlet pipe of the third embodiment; Fig.21 yes Fig. 20 Explosion diagram of Fig. 22 yes Fig.21 A magnified view of part B; In the figure: 1, tower body; 11, tower body; 111, air outlet; 112, air outlet valve; 113, docking through hole; 1131, first through hole; 1132, second through hole; 1133, third through hole; 114, purge through hole; 115, feed pipe; 116, discharge pipe; 117, feed plug; 118, discharge plug; 12, tower cover; 121, air inlet; 122, air inlet valve; 13, foot; 14, bolt; 15, nut; 16, partition; 17, oxygen inlet pipe; 171, oxygen inlet; 172, main fork pipe; 173, bifurcated pipe; 174, diversion hole; 18, sealing ring; 181, connecting port; 2, oxygen grid; 21, net cylinder; 211, oxygen outlet; 22, end plate; 221, inlet and outlet; 3, rotating assembly; 31, driven gear ring; 32, transmission gear; 321, transmission concentric shaft; 33, driving gear; 34, rotating unit; 341, rotating motor; 342, rotating concentric shaft; 343, bearing; 344, sealing cover; 35, transmission unit; 351, transmission wheel; 352, transmission connecting rod; 353, hinged shaft; 36, sealing cover; 361, visual window; 362, replacement mark; 4, connecting component; 41, connecting main pipe; 411, air intake check valve; 412, sealing block; 42, connecting branch pipe; 421, oxygen production check valve; 5, nitrogen extraction component; 51, negative pressure pump; 52, nitrogen extraction main pipe; 53, nitrogen extraction branch pipe; 531, nitrogen extraction valve; 54, nitrogen exhaust pipe; 541, nitrogen exhaust valve; 6, purge pipe; 61, purge main pipe; 62, purge branch pipe; 63, purge valve. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0019] First embodiment

[0020] like Figure 1-Figure 13 As shown, the high-purity oxygen production adsorption tower of the first embodiment of the present invention comprises: The tower body 1 is a hollow structure. An air inlet 121 and an air outlet 111 are respectively arranged at the top and the bottom of the tower body 1. The air inlet 121 and the air outlet 111 are respectively connected to an air inlet valve 122 and an air outlet valve 112. A partition 16 distributed along the vertical direction is fixed in the tower body 1. The partition 16 and the tower body 1 are enclosed to form an air inlet cavity and a plurality of oxygen-making cavities distributed below the air inlet cavity along the vertical direction. The air inlet 121 is communicated with the air inlet cavity, and the air outlet 111 is communicated with the oxygen-making cavity at the bottom. A horizontal oxygen-making inlet pipe 17 is fixed in the oxygen-making cavity. An oxygen-making inlet 171 is arranged on the side wall of the oxygen-making inlet pipe 17. The aperture of the oxygen-making inlet 171 is smaller than the aperture of the outer diameter of the oxygen-making molecular sieve. The oxygen-generating grid frame 2 is coaxially sleeved outside the oxygen-generating inlet pipe 17 and is located in the air inlet cavity. The oxygen-generating grid frame 2 is densely covered with oxygen-generating outlets 211 with apertures smaller than the outer diameter of the oxygen-generating molecular sieve. The oxygen-generating grid frame 2 rotates on the oxygen-generating inlet pipe 17 around its own center line. The oxygen-generating grid frame 2 divides the oxygen-generating cavity into a storage cavity and an oxygen-enriching cavity. The inner cavity of the oxygen-generating inlet pipe 17, the oxygen-generating inlet 171, the storage cavity, the oxygen-generating outlet 211 and the oxygen-enriching cavity are sequentially connected, and the storage cavity is used to store the oxygen-generating molecular sieve; Rotating assembly 3, the rotating assembly 3 drives each oxygen-generating grid frame 2 to rotate with the axis of the oxygen-generating inlet pipe 17 as the center line; The connecting component 4 and the nitrogen extraction component 5, the connecting component 4 is used to connect the air intake chamber with the inner cavity of the oxygen production inlet pipe 17 located at the top, and to connect the oxygen-enriched chamber at the high position of the adjacent oxygen production chamber with the inner cavity of the oxygen production inlet pipe 17 that conflicts with it, and the nitrogen extraction component 5 includes a negative pressure pump 51, and the input end of the negative pressure pump 51 is connected to the oxygen-enriched chamber.

[0021] When the device is used, the air inlet valve 122 at the air inlet 121 and the air outlet valve 112 at the air outlet 111 are opened, and the compressed air after filtering and purification first enters the air inlet cavity through the air inlet 121, and then enters the oxygen production inlet pipe 17 of the oxygen production cavity immediately below the air inlet cavity through the connecting component 4, and is discharged from the oxygen production inlet 171 (the oxygen production inlet 171 is densely distributed at the bottom of the circumferential side wall of the oxygen production inlet pipe 17 along the axial direction of the oxygen production inlet pipe 17), and enters the inner side of the oxygen production grid 2, that is, the storage cavity, and contacts with the oxygen production molecular sieve in the storage cavity. The oxygen production molecular sieve absorbs nitrogen in the compressed air, so that the oxygen concentration in the compressed air is increased. , and then discharged from the oxygen production outlet 211 and enters the oxygen-enriched chamber. After that, the compressed air with increased oxygen concentration after adsorbing a part of nitrogen in the oxygen-enriched chamber enters the oxygen production inlet pipe 17 below through the connecting component 4, and then passes through the oxygen production inlet 171, the storage chamber, the oxygen production outlet 211 and the oxygen-enriched chamber in sequence. While passing through the storage chamber, the oxygen production molecular sieve in the storage chamber is used to continuously adsorb nitrogen in the compressed air, so that the nitrogen concentration in the compressed air gradually decreases while the oxygen concentration gradually increases. Finally, after entering the oxygen-enriched chamber in the oxygen production chamber at the bottom, a high concentration of oxygen is formed, and then the high concentration of oxygen is discharged downward through the air outlet 111.

[0022] While the compressed air passes through the inside of the tower body 1, the rotating assembly 3 is started, driving the oxygen-making grid frames 2 in each oxygen-making chamber to rotate, thereby changing the position of the oxygen-making molecular sieve in the storage chamber, so that the air discharged from the oxygen-making inlet 171 can be directed toward different oxygen-making molecular sieves, that is, while the compressed air is continuously discharged from the oxygen-making inlet 171, different oxygen-making molecular sieves adsorb the nitrogen in the compressed air, and the oxygen-making grid frames 2 rotate, so that the oxygen-making molecular sieves in the storage chamber can uniformly adsorb the nitrogen in the compressed air. In this way, the difference in the amount of nitrogen adsorbed by the oxygen-making molecular sieves in the storage chamber is reduced, so that the adsorption amount of the oxygen-making molecular sieves in each location remains uniform and can reach a saturated state at the same time, and it is convenient to regenerate by discharging nitrogen in the saturated state. Therefore, it is avoided that some oxygen-producing molecular sieves reach a saturated state while other parts do not reach a saturated state, so that when compressed air is introduced, the oxygen-producing molecular sieves that are saturated with adsorption are easy to discharge the adsorbed nitrogen, while the oxygen-producing molecular sieves that have not reached a saturated state have a limited nitrogen adsorption capacity, resulting in a limited oxygen concentration and a high nitrogen concentration in the compressed air that finally enters the negative pressure chamber. That is, by keeping the oxygen-producing grid 2 rotating, the oxygen-producing molecular sieves at various locations can reach a saturated state in the same time period, and then can be regenerated in the same time period, avoiding the limited concentration of oxygen finally discharged due to excessive differences.

[0023] After the oxygen-producing molecular sieve inside the oxygen-producing grid 2 has been running for a period of time, it reaches a saturated state. At this time, the air outlet valve 112 and the air inlet valve 122 are closed, and the negative pressure pump 51 is started to extract the air in the oxygen-enriched chamber. Since the oxygen-enriched chamber, the oxygen-producing outlet 211, the storage chamber, the oxygen-producing inlet 171 and the inner cavity of the oxygen-producing inlet pipe 17 are connected in sequence, a negative pressure can be formed in the oxygen-enriched chamber and the storage chamber, which facilitates the oxygen-producing molecular sieve to discharge the adsorbed nitrogen and discharge it out of the tower body 1 through the output end of the negative pressure pump 51.

[0024] In this embodiment, the specific structure of the tower body 1 is as follows: Figure 1-Figure 6 , Fig.12 and Fig.13As shown, the tower body 1 includes a tower body 11 with an open top, and the bottom of the tower body 11 is integrally connected with a support leg 13 extending in a vertical direction. The top of the tower body 11 is provided with a tower cover 12, and the tower cover 12 is fixedly connected to the tower body 11 by threaded bolts 14 and nuts 15, an air outlet 111 is arranged at the bottom of the tower body 11, and an air inlet 121 is arranged on the tower cover 12. The partition 16 is horizontally arranged in the tower body 11, and three partitions 16 are evenly spaced in the vertical direction. The circumferential outer edge of the partition 16 is fixedly connected to the circumferential inner wall of the tower body 11, so that the tower body 11, the tower cover 12 and the three partitions 16 enclose an air intake cavity at the top and three oxygen production cavities distributed below the air intake cavity in the vertical direction. Correspondingly, three oxygen production inlet pipes 17 are arranged in this embodiment, which are horizontally arranged one by one below the three partitions 16. The axial direction of the oxygen production inlet pipe 17 is horizontal, and the two ends are fixedly connected to the two inner side walls facing the tower body 1 respectively.

[0025] In contrast, there are three oxygen production grids 2, which are arranged one-to-one with the three partitions 16. Of course, according to the height and width dimensions of the tower body 11, the partitions 16 can also be set to other multiple numbers, and the intervals between the partitions 16 can also be changed accordingly. The number of partitions 16, oxygen production inlet pipes 17 and oxygen production grids 2 is equal and corresponds one-to-one.

[0026] The specific structure of the oxygen production grid 2 can be referred to Figure 2-Figure 5 , Figure 7 and Figure 8 As shown, the oxygen-generating grid frame 2 includes a mesh tube 21 sleeved outside the oxygen-generating inlet pipe 17, and the circumferential side wall of the mesh tube 21 is densely covered with through-hole-shaped oxygen-generating outlets 211. The two ends of the mesh tube 21 are fixedly connected with end plates 22 that cover the ends of the mesh tube 21. The end plate 22 is annular, and its circumferential inner wall is sealed and connected to the oxygen-generating inlet pipe 17. The end plate 22, the oxygen-generating inlet pipe 17 and the mesh tube 21 are coaxial, so that the above three enclose a storage cavity with a ring-shaped cross section. The storage cavity is used to store oxygen-generating molecular sieves. The particle size of the oxygen-generating molecular sieve is larger than the inner diameter of the oxygen-generating inlet 171 and the particle size of the oxygen-generating molecular sieve. The inner diameter of the oxygen outlet 211 is such that when the compressed air composed of oxygen and nitrogen enters the storage chamber from the oxygen inlet 171 of the oxygen inlet pipe 17, part of the nitrogen in the compressed air is absorbed by the oxygen molecular sieve, so that the nitrogen concentration in the compressed air is reduced, and the corresponding oxygen concentration is increased, and then discharged through the oxygen outlet 211, and enters the oxygen-enriched chamber composed of the oxygen-making grid 2, the two adjacent partitions 16, and the two inner side walls of the tower body 11, that is, the oxygen concentration of the compressed air in the inner chamber of the oxygen inlet pipe 17, the storage chamber, and the oxygen-enriched chamber increases in sequence. Based on the above principle, during the process of compressed air entering from the air inlet 121, passing through the air inlet chamber and the three oxygen-making chambers, and finally being discharged from the air outlet 111, the oxygen concentration in the mixed compressed air gradually increases, and finally forms a gas mainly composed of high-concentration oxygen.

[0027] A further improvement is that the two inner side walls facing the tower body 1 are provided with docking through holes 113 distributed in the vertical direction, and the docking through holes 113 include a first through hole 1131, a second through hole 1132 and a third through hole 1133. The first through hole 1131 is connected to the air inlet cavity, and the second through hole 1132 is fixedly connected to the end of the oxygen production inlet pipe 17. In two adjacent oxygen production cavities, the third through hole 1133 is connected between the oxygen-enriched cavity corresponding to the upper oxygen production cavity and the second through hole 1132 corresponding to the lower oxygen production cavity through the connecting component 4.

[0028] Specifically, two groups of docking holes 113 are provided, which are respectively provided on the two side walls facing the tower body 11. Figure 6 As shown, the two groups of docking through holes 113 each include a first through hole 1131, three second through holes 1132 and two third through holes 1133, the first through hole 1131 is located at the top and communicates with the air inlet cavity, the three second through holes 1132 and the two third through holes 1133 are evenly spaced, and the distribution intervals of adjacent second through holes 1132 and third through holes 1133 are the same as the distribution intervals of the second through holes 1132 and the first through holes 1131 at the top, and the three second through holes 1132 are fixedly communicated with the end of the oxygen inlet pipe 17, so that the compressed air can enter the oxygen inlet pipe 17 from the second through holes 1132. At the ends of 7, the two third through holes 1133 are respectively connected to the two oxygen-enriched chambers above (the bottom oxygen-enriched chamber is directly connected to the gas outlet 111, so there is no need to set up the third through hole 1133), so that after the oxygen concentration is increased by the oxygen-generating molecular sieve on the inner side of the oxygen-generating grid 2 adsorbing part of the nitrogen, the compressed air with increased oxygen concentration can pass through the third through hole 1133 and then enter the second through hole 1132 immediately below through the connecting component 4, and then enter the storage chamber corresponding to the oxygen-generating inlet pipe 17 from the lower oxygen-generating inlet pipe 17, contact with the oxygen-generating molecular sieve, and further increase the oxygen concentration.

[0029] A further improvement is that the connecting component 4 includes a connecting main pipe 41 extending in the vertical direction and a connecting branch pipe 42 distributed side by side in the vertical direction. The connecting main pipe 41 is connected to the connecting branch pipe 42, and one end of the connecting branch pipe 42 away from the connecting main pipe 41 is connected to the docking through hole 113 in a one-to-one correspondence. An oxygen-making one-way valve 421 is arranged in the connecting branch pipe 42 corresponding to the second through hole 1132, and an air intake one-way valve 411 and a sealing block 412 distributed at intervals in the vertical direction are also arranged in the connecting main pipe 41. Each air intake one-way valve 411 is arranged between two adjacent connecting branch pipes 42, and each sealing block 412 is arranged between two adjacent connecting branch pipes 42. Each connecting branch pipe 42 except the end is located between the adjacent oxygen-making one-way valve 421 and the sealing block 412.

[0030] Specifically, Figure 1-Figure 5 , Figure 9-11As shown, two connecting components 4 are provided, which are arranged on both sides of the tower body 11 and connected to the two groups of docking through holes 113. Specifically, the connecting component 4 includes a connecting main pipe 41 and six connecting branch pipes 42. The six connecting branch pipes 42 are connected to the first through hole 1131, the second through hole 1132 and the third through hole 1133 respectively, and the distribution interval of the six connecting branch pipes 42 is the same as the distribution interval of the adjacent second through hole 1132 and the third through hole 1133, which is convenient for docking. The connecting branch pipes 42 are preferably fixed to the outer wall of the tower body 11 by welding to ensure that each connecting branch pipe 42 is docked and connected with the corresponding docking through hole 113.

[0031] An oxygen-making one-way valve 421 is provided in the connecting branch pipe 42 corresponding to the second through hole 1132, and the oxygen-making one-way valve 421 is used to limit the flow direction of compressed air in the oxygen-making process, so that the compressed air can only enter the oxygen-making inlet pipe 17 from the connecting branch pipe 42; and three air intake one-way valves 411 and two sealing blocks 412 are also provided in the connecting main pipe 41, which are distributed at intervals. The three air intake one-way valves 411, the two sealing blocks 412 and the four connecting branch pipes 42 outside the two ends are distributed at intervals in the vertical direction, and the air intake one-way valve 411 is used to limit the flow direction of air in the connecting main pipe 41, so that the compressed air can only flow from top to bottom.

[0032] After adopting the above structure, after the compressed air passes through the air inlet chamber and the first through hole 1131, it first enters the connecting main pipe 41 from the connecting branch pipe 42 at the top position, flows downward through the air inlet check valve 411, and is blocked by the sealing block 412. The compressed air passes through the oxygen-making check valve 421 at the top position and enters the oxygen-making inlet pipe 17 at the top. After passing through the storage chamber and the oxygen-enriched chamber, it enters the connecting branch pipe 42 corresponding to the third through hole 1133 through the third through hole 1133. After being blocked by the sealing block 412, it flows downward through the second air inlet check valve 411. In this way, the compressed air flows in a zigzag manner through the connecting component 4 and each oxygen-making chamber. During the flow, it contacts the oxygen-making molecular sieve in each storage chamber, thereby increasing the oxygen concentration in the compressed air.

[0033] A further improvement is that the nitrogen extraction component 5 includes a nitrogen extraction main pipe 52 extending in the vertical direction and nitrogen extraction branch pipes 53 distributed in sequence along the vertical direction, the nitrogen extraction main pipe 52 is connected to the input end of the negative pressure pump 51, and each nitrogen extraction branch pipe 53 is connected one by one between the connecting branch pipe 42 corresponding to the second through hole 1132 and the nitrogen extraction main pipe 52, the nitrogen extraction branch pipe 53 is connected to a nitrogen extraction valve 531, and the nitrogen extraction branch pipe 53 is located on the side of the oxygen production one-way valve 421 away from the second through hole 1132.

[0034] Specifically, Figure 1-Figure 3 , Fig. 9 and Fig.10As shown, in this embodiment, the nitrogen extraction main pipe 52 extends downward and is connected to the input end of the negative pressure pump 51. Three nitrogen extraction branch pipes 53 are provided, corresponding one to one with the three oxygen production inlet pipes 17 and the three second through holes 1132. The nitrogen extraction branch pipe 53 is correspondingly connected to the connecting branch pipe 42 corresponding to the second through hole 1132, and the connecting position is located between the oxygen production one-way valve 421 and the second through hole 1132.

[0035] After adopting the above structure, when the oxygen-generating molecular sieve in the storage chamber is saturated with adsorption or has been used for a certain period of time (the specific use conditions can be determined according to the actual situation of the user, for example, an oxygen concentration detector can be set at the outlet 111 to detect the oxygen concentration, and when the concentration does not meet the standard, oxygen production is stopped for regeneration treatment), the air inlet valve 122 and the air outlet valve 112 are closed, the negative pressure pump 51 is started and the nitrogen extraction valve 531 is opened. After the negative pressure pump 51 is started, the air in the oxygen-generating inlet pipe 17 is extracted through the nitrogen extraction main pipe 52, the nitrogen extraction branch pipe 53 and a part of the connecting branch pipe 42, and the rotating group Component 3 keeps the oxygen production grid 2 rotating, so that negative pressure is formed in the oxygen production inlet pipe 17, the storage chamber and the oxygen-enriched chamber, which is conducive to the discharge of the oxygen adsorbed by the oxygen production molecular sieve, thereby promoting the regeneration of the oxygen production molecular sieve, so that the oxygen production molecular sieve can restore the adsorption capacity, so as to continuously produce oxygen for the device. When the nitrogen is discharged, the air in the storage chamber enters the oxygen production inlet pipe 17 from the oxygen production inlet 171, passes through the second through hole 1132, and is blocked by the oxygen production one-way valve 421, so that the air passes through a part of the connecting branch pipe 42, and then passes through the nitrogen extraction branch pipe 53 and the nitrogen extraction main pipe 52 in turn, and then enters the negative pressure pump 51, and is then discharged.

[0036] As a further improvement, the tower body 1 is further provided with purge holes 114 which are in one-to-one correspondence with the oxygen-enriched chambers, and the purge holes 114 are connected with purge valves 63 and are used to introduce inert gas.

[0037] Specifically, Figure 1 , Figure 3 and Fig.13 As shown, a purge through hole 114 is provided on one side of the tower body 11, and a purge pipe 6 is also provided on the same side of the tower body 11. The purge pipe 6 includes a purge main pipe 61 extending in the vertical direction and purge branch pipes 62 evenly spaced in the vertical direction and extending in the horizontal direction. The purge branch pipes 62 are fixedly connected between the purge main pipe 61 and the purge through hole 114. The purge branch pipes 62 are connected to the purge through holes 114 in a one-to-one correspondence, and a purge valve 63 is provided on the purge branch pipe 62.

[0038] After the negative pressure pump 51 is started for a period of time, the purge valve 63 is opened to introduce inert gas into the purge main pipe 61, so that the inert gas enters the oxygen-enriched chamber through the purge main pipe 61 and the purge branch pipe 62, and is blown from the outside to the rotating oxygen-making grid frame 2 to purge the oxygen-making molecular sieve in the storage chamber to remove impurities attached to the oxygen-making molecular sieve, so as to promote the regeneration of the oxygen-making molecular sieve. During the purge process, the inert gas and impurities are discharged from the negative pressure pump 51 through the oxygen-making inlet 171, the oxygen-making inlet pipe 17, the nitrogen extraction branch pipe 53 and the nitrogen extraction main pipe 52 in turn.

[0039] After the regeneration is completed, the purge valve 63 and the nitrogen extraction valve 531 are closed, and the air inlet valve 122 and the air outlet valve 112 are opened, and the device can continue to produce oxygen.

[0040] A further improvement is that the output end of the negative pressure pump 51 is fixedly connected to two nitrogen exhaust pipes 54 , and both nitrogen exhaust pipes 54 are provided with nitrogen exhaust valves 541 .

[0041] In the early stage of regeneration of the oxygen-producing molecular sieve, before the purge valve 63 is opened, one of the nitrogen exhaust valves 541 is opened and the other nitrogen exhaust valve 541 is closed. At this time, the gas discharged by the negative pressure pump 51 is mainly the nitrogen adsorbed by the oxygen-producing molecular sieve, so the nitrogen concentration in the discharged gas is relatively high, and this part of the gas can be used for other industrial production activities. In the later stage of regeneration of the oxygen-producing molecular sieve, that is, after the purge valve 63 is opened, the working states of the two nitrogen exhaust valves 541 are switched, one of which is switched from closed to open, and the other is switched from open to closed. The gas discharged by the negative pressure pump 51 through the other nitrogen exhaust pipe 54 is a mixed gas of nitrogen, inert gas and a small amount of impurities. Since the nitrogen concentration in this part of the mixed gas is lower than that in the early stage and the purification cost is relatively high, it can be directly discharged to the outside.

[0042] A further improvement is that the rotating assembly 3 includes a driven gear ring 31 coaxially sleeved on the outside of the oxygen production inlet pipe 17 and fixedly connected to the oxygen production grid 2, a transmission gear 32 rotating around its own axis in the oxygen enrichment chamber and meshing with the driven gear ring 31, a driving gear 33 meshing with one of the transmission gears 32 and located in the oxygen enrichment chamber, a rotating unit 34 driving the driving gear 33 to rotate, and a transmission unit 35 arranged between two adjacent transmission gears 32, and the two adjacent transmission gears 32 are transmission connected through the transmission unit 35.

[0043] When the rotating assembly 3 is running, the rotating unit 34 is started, driving the driving gear 33 to rotate, so that the transmission gear 32 meshing with the driving gear 33 rotates, and the transmission gear 32 rotates through the transmission unit 35, thereby driving the driven gear ring 31 meshing with the transmission gear 32 to rotate, and the driven gear ring 31 is fixedly connected to the oxygen production grid 2 coaxially, so that the oxygen production grid 2 rotates.

[0044] A further improvement is that the transmission unit 35 includes two transmission wheels 351 which are fixedly connected to the coaxial center line of two adjacent transmission gears 32 and are located outside the oxygen production chamber, and a transmission connecting rod 352 which is hinged between the two transmission wheels 351. The rotating assembly 3 also includes a sealing cover 36, which is enclosed with the tower body 1 to form a sealed chamber. The transmission connecting rod 352 and the transmission wheel 351 are both located in the sealed chamber. The transmission wheel 351 and the transmission gear 32 are fixedly connected by a transmission coaxial shaft 321, and the transmission coaxial shaft 321 seals and passes through the side wall of the tower body 1.

[0045] Specifically, Figure 2 , Figure 3 , Figure 7 and Figure 8 As shown, one end of the end plate 22 facing away from the mesh cylinder 21 is fixedly connected with a driven gear ring 31 coaxially, and one side of the driven gear ring 31 facing away from the end plate 22 is in contact with the inner wall of the tower body 11, thereby limiting the axial position of the end plate 22 and the mesh cylinder 21, and ensuring the stable rotation of the oxygen production grid 2 around its own axis; both ends of the inner side of the oxygen production chamber are provided with transmission gears 32, which are meshed with the driven gear ring 31.

[0046] The driving gears 33 are located at the two ends of the inner side of the lowest oxygen production chamber and mesh with the two transmission gears 32 in the oxygen production chamber in a one-to-one correspondence. The rotating unit 34 includes a rotating motor 341, a rotating concentric shaft 342 and a bearing 343. The rotating concentric shaft 342 is fixedly passed through the two driving gears 33 on the coaxial center line and the two ends respectively pass through the side walls of the tower body 11. Both ends of the rotating concentric shaft 342 are connected to the side walls of the tower body 11 through the bearings 343. The rotating motor 341 is fixed to one side of the tower body 11 and is fixedly connected to one end of the rotating concentric shaft 342 on the coaxial center line. The sealing cover 344 is fixed to the other side of the tower body 11 and covers the part of the rotating concentric shaft 342 that passes through the tower body 11.

[0047] In the transmission unit 35, the transmission gear 32 and the transmission wheel 351 are coaxial and respectively adhere to the inner wall and outer wall of the tower body 11. The transmission gear 32 and the transmission wheel 351 are fixedly connected by a transmission coaxial shaft 321. The transmission coaxial shaft 321 seals and penetrates the side wall of the tower body 11. The two ends of the transmission connecting rod 352 are respectively hinged to the side of the transmission wheel 351 facing away from the transmission gear 32 through two hinge shafts 353. The transmission unit 35 also includes a sealing cover 36. The sealing cover 36 and the outer wall of the tower body 11 enclose a sealed cavity isolated from the outside, so that the transmission wheel 351 and the transmission connecting rod 352 can move safely and stably in the sealed cavity.

[0048] After adopting the above structure, the rotating motor 341 in the rotating unit 34 is started, and the driving gears 33 at both ends are driven to rotate by rotating the coaxial shaft 342, acting on the lowest transmission gear 32, so that the transmission wheel 351 connected to the corresponding coaxial centerline of the transmission gear 32 rotates, and the transmission wheel 351 makes the two upper transmission wheels 351 rotate synchronously through the transmission connecting rod 352, thereby driving the two upper transmission gears 32 to keep rotating with the bottom transmission gear 32, so that the oxygen-making grids 2 in the three oxygen-making chambers can rotate synchronously, so that the compressed air flowing out of the oxygen-making inlet 171 can contact with the oxygen-making molecular sieves at various locations in the storage chamber, ensuring that the amount of nitrogen adsorbed by the oxygen-making molecular sieves at various locations is consistent, reducing differences, and enabling the oxygen-making molecular sieves at various locations to reach saturation in the same time period, facilitating synchronous regeneration while ensuring the oxygen concentration in the oxygen-making process.

[0049] Second embodiment

[0050] like Figure 14-Figure 19 As shown, the high-purity oxygen production adsorption tower of the second embodiment of the present invention is based on the first embodiment, except that one end of the oxygen production grid 2 is provided with two inlets and outlets 221, the center line of the two inlets and outlets 221 intersects perpendicularly with the axis of the oxygen production inlet pipe 17, and the intersection point is the midpoint of the center line, and a sealing ring 18 is fixed on the side wall of the tower body 1 facing the two inlets and outlets 221, and the sealing ring 18 is provided with two connecting ports 181 distributed in the vertical direction, and a sealing ring 18 is fixed on the side wall of the tower body 1. The feeding pipe 115 and the discharging pipe 116 correspond to the two connecting ports 181 one by one and are respectively located outside the tower body 1. The feeding pipe 115 and the discharging pipe 116 are respectively detachably and sealedly connected with a feeding plug 117 and a discharging plug 118. The movable path of the oxygen production grid 2 includes a replacement station. At the replacement station, the feeding pipe 115 is connected to one of the inlets and outlets 221 through the connecting port 181 located at the top, and the discharging pipe 116 is connected to the other inlet and outlet 221 through the connecting port 181 located at the bottom.

[0051] After the oxygen-generating molecular sieve reaches its service life or the number of regenerations reaches a limit, the oxygen-generating adsorption capacity of the oxygen-generating molecular sieve decreases significantly, so the oxygen-generating molecular sieve in the storage chamber needs to be replaced, so the above structure is adopted. Specifically, when the oxygen-generating grid 2 rotates to the replacement station, the two inlets and outlets 221 are distributed in the vertical direction and are respectively connected to the two connecting ports 181. After the feeding plug 117 and the discharging plug 118 are removed, the expired oxygen-generating molecular sieve in the storage chamber can be discharged from the oxygen-generating chamber through the lower inlet and outlet 221 and the connecting port 181 in turn, and then the discharging plug 118 is fixedly installed on the discharging pipe 116. The unused oxygen-generating molecular sieve is added to the feeding pipe 115, so that the oxygen-generating molecular sieve can pass through the feeding pipe 115 and then enter the storage chamber through the upper connecting port 181 and the inlet and outlet 221 in turn. After the storage chamber is filled with the oxygen-generating molecular sieve, the feeding plug 117 is screwed again, and the replacement and replenishment operation of the oxygen-generating molecular sieve is completed. There is no need to disassemble and separate the tower body 11 and the tower cover 12. The replacement can be completed by operating the feeding plug 117 and the discharging plug 118, which is convenient to operate.

[0052] One end of the feeding pipe 115 and one end of the discharging pipe 116 are both fixed on the side wall of one side of the tower body 11, the other end of the feeding pipe 115 is upward and threadedly connected with a feeding plug 117, and the other end of the discharging pipe 116 is downward and threadedly connected with a discharging plug 118, the feeding plug 117 is sealedly connected to the circumferential inner wall of the feeding pipe 115, and the discharging plug 118 is sealedly connected to the circumferential inner wall of the discharging pipe 116, thereby ensuring the sealing performance and facilitating the detachable connection between the feeding plug 117 and the feeding pipe 115 and the detachable connection between the discharging plug 118 and the discharging pipe 116, thereby facilitating the discharge of the old oxygen-producing molecular sieve through the discharging pipe 116 and the replenishment of the new oxygen-producing molecular sieve through the feeding pipe 115.

[0053] like Figure 16-Figure 19 As shown, a recess is provided on the side of the sealing ring 18 facing away from the oxygen production grid frame 2, and the recess is convenient for accommodating the transmission gear 32 and the driving gear 33. This side of the sealing ring 18 is fixedly connected to the inner wall of the tower body 11. Two connecting holes corresponding to the two connecting ports 181 are also provided on the side wall of the tower body 11. The two connecting ports 181 are respectively connected to the feeding pipe 115 and the discharging pipe 116 through the two connecting holes. The other side of the sealing ring 18 is sealed and fitted with one of the end plates 22 of the oxygen production grid frame 2, and the sealing ring 18 is directly opposite to the two inlets and outlets 221, so that during the rotation of the oxygen production grid frame 2, except for the replacement station, the sealing ring 18 can block the two inlets and outlets 221 to prevent the oxygen production molecular sieve from flowing out of the storage cavity through the above two inlets and outlets 221 at other stations.

[0054] A further improvement is that a visual window 361 is provided on the side wall of the sealing cover 36 facing the transmission wheel 351, a replacement mark 362 is provided on the visual window 361, a hinge shaft 353 is provided on the side of the transmission wheel 351 adjacent to the visual window 361, the end of the transmission connecting rod 352 is hinged to the hinge shaft 353, and at the replacement station, the hinge shaft 353 on at least one of the transmission wheels 351 faces the replacement mark 362.

[0055] Specifically, the side wall of the tower body 11 to which the connecting port 181 faces has a sealing cover 36 fixedly connected thereto and a visible window 361 is provided. The visible window 361 faces the middle transmission wheel 351 among the three transmission wheels 351 on the side, and the replacement mark 362 is a horizontal groove-shaped structure passing through the axis line of the transmission wheel 351.

[0056] Since the transmission gear 32 is meshed with the driven gear ring 31, and the driven gear ring 31 is fixedly connected to the end plate 22, and the transmission wheel 351 is fixedly connected to the transmission gear 32, the rotational angular velocity of the oxygen production grid 2 is proportional to the rotational angular velocity of the transmission wheel 351. During design, the outer diameter ratio of the transmission gear 32 and the driven gear ring 31 is controlled to control the rotational angular velocity of the two. For example, when the outer diameters of the transmission gear 32 and the driven gear ring 31 are the same, the rotational angular velocity of the two is the same, and the rotational angular velocity of the transmission wheel 351 is the same as that of the oxygen production grid 2. At this time, the transmission wheel 351 can be observed through the viewing window 361. The position of the hinge shaft 353 on 351 relative to the replacement mark 362 can determine the rotation angle position of the oxygen production rack 2, and then the positional relationship between the two inlets and outlets 221 can be determined. In this embodiment, when the projection of the replacement mark 362 on the transmission wheel 351 is aligned with the hinge shaft 353, it indicates that the two inlets and outlets 221 are distributed in the vertical direction. At this time, the oxygen production rack 2 is located at the replacement station. At this station, the rotating motor 341 can be controlled to stop running so that the oxygen production rack 2 remains at the replacement station, which facilitates opening the feeding plug 117 and the discharging plug 118 to replace the oxygen production molecular sieve in the storage chamber.

[0057] Third embodiment

[0058] like Figure 20-22 As shown, the high-purity oxygen production adsorption tower of the third embodiment of the present invention is based on the second embodiment, with the difference that the oxygen production inlet 171 is densely distributed at the bottom of the oxygen production inlet pipe 17, the oxygen production inlet 171 is fixedly connected with a downward main fork pipe 172, the main fork pipe 172 is fixedly connected with a branch pipe 173 distributed along the axial direction of the main fork pipe 172, and the main fork pipe 172 and the branch pipe 173 are both provided with a diversion hole 174, and the inner diameter of the diversion hole 174 is smaller than the outer diameter of the oxygen production molecular sieve.

[0059] In this embodiment, the main fork tube 172 and the branch tube 173 are both elastic tubes, preferably made of rubber. When making oxygen, after the compressed air flows out through the oxygen inlet 171, it enters the main fork tube 172, and one part enters the storage chamber through the diverter hole 174 on the main fork tube 172, and the other part enters the diverter hole 174 on the diverter tube 173 and then enters the storage chamber. The two parts of compressed air contact the oxygen-making molecular sieves at different positions in the storage chamber, further ensuring the uniformity of nitrogen adsorption by the oxygen-making molecular sieves in the storage chamber; not only that, after the oxygen-making grid frame 2 rotates, the main fork tube 172 and the branch tube 173 can drive the oxygen-making molecular sieves in contact with the two to move, so that the part of the oxygen-making molecular sieve changes its position. Compared with the prior art, the oxygen-making molecular sieves are piled up and filled, resulting in the oxygen-making molecular sieves being squeezed against each other and fixed in position, and the squeezed parts between the oxygen-making molecular sieves cannot contact the compressed air. In this embodiment, The relative movement of the grid 2 and the main fork tube 172 and the fork tube 173 allows the oxygen-producing molecular sieve to produce slight movement, and the contact surface between the oxygen-producing molecular sieves changes, thereby changing the contact portion between the compressed air and the oxygen-producing molecular sieve, which is beneficial to increasing the uniformity of the oxygen-producing molecular sieve's own nitrogen adsorption, and avoiding the inability to adsorb nitrogen due to squeezing contact with other oxygen-producing molecular sieves at some positions. Moreover, since the oxygen-producing molecular sieve can adsorb nitrogen at all locations, the total amount of nitrogen that it can adsorb is increased, and accordingly, the service life is extended; in addition, after the main fork tube 172 and the fork tube 173 are both elastic tubes, both are in elastic contact with the oxygen-producing molecular sieve, avoiding the powdering and debris of the oxygen-producing molecular sieve surface caused by rigid contact, which affects the quality of the compressed air after passing through the oxygen-producing outlet 211. The main fork tube 172 and the fork tube 173 are both rubber tubes, which can avoid the powdering and wear of the oxygen-producing molecular sieve and ensure the safe and stable operation of the device.

[0060] In this embodiment, the main fork tube 172 extends in the vertical direction, and its top is connected to the oxygen inlet 171 in a one-to-one correspondence and fixed below the oxygen inlet pipe 17. The bifurcated tubes 173 are evenly spaced along the axial direction of the main fork tube 172. The axial direction of the bifurcated tube 173 is perpendicular to the axial direction of the main fork tube 172. The diversion holes 174 are densely distributed on the main fork tube 172 and the bifurcated tube 173. In this way, the compressed air discharged from the oxygen inlet pipe 17 can pass through the diversion holes 174 on the main fork tube 172 and the bifurcated tube 173. 4 Enter into different positions in the storage chamber, increase the number of contacts with the oxygen-producing molecular sieve in the storage chamber, and then increase the contact adsorption area of ​​the oxygen-producing molecular sieve, improve the uniformity of nitrogen adsorption by the oxygen-producing molecular sieves in various locations in the storage chamber, and reduce the differences. Not only that, in the regeneration process of the oxygen-producing molecular sieve, it can also adsorb the nitrogen adsorbed by the oxygen-producing molecular sieves in various locations, ensure the uniformity of nitrogen adsorption and nitrogen release regeneration of each oxygen-producing molecular sieve, increase the oxygen concentration, and improve the regeneration effect of the oxygen-producing molecular sieve.

[0061] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-purity oxygen production adsorption tower, characterized in that: include: A tower body (1), wherein the tower body (1) is a hollow structure, wherein an air inlet (121) and an air outlet (111) are respectively arranged at the top and the bottom of the tower body (1), wherein the air inlet (121) and the air outlet (111) are respectively connected to an air inlet valve (122) and an air outlet valve (112), wherein a partition (16) distributed in a vertical direction is fixed inside the tower body (1), wherein the partition (16) and the tower body (1) enclose an air inlet cavity and a plurality of oxygen production cavities distributed below the air inlet cavity in a vertical direction, wherein the air inlet (121) is communicated with the air inlet cavity, and the air outlet (111) is communicated with the oxygen production cavity at the bottom, wherein a horizontal oxygen production inlet pipe (17) is fixed inside the oxygen production cavity, wherein a side wall of the oxygen production inlet pipe (17) is provided with an oxygen production inlet (171), wherein the aperture of the oxygen production inlet (171) is smaller than the aperture of the outer diameter of the oxygen production molecular sieve; An oxygen production grid (2), wherein the oxygen production grid (2) is coaxially sleeved outside the oxygen production inlet pipe (17) and is located in the air inlet cavity, the oxygen production grid (2) is densely covered with oxygen production outlets (211) having a pore size smaller than the outer diameter of the oxygen production molecular sieve, the oxygen production grid (2) rotates on the oxygen production inlet pipe (17) around its own center line, and the oxygen production grid (2) divides the oxygen production cavity into a storage cavity and an oxygen enrichment cavity, the inner cavity of the oxygen production inlet pipe (17), the oxygen production inlet (171), the storage cavity, the oxygen production outlet (211) and the oxygen enrichment cavity are sequentially connected, and the storage cavity is used to store the oxygen production molecular sieve; A rotating assembly (3), wherein the rotating assembly (3) drives each oxygen production grid frame (2) to rotate with the axis of the oxygen production inlet pipe (17) as the center line; A connecting component (4) and a nitrogen extraction component (5), wherein the connecting component (4) is used to connect the air inlet chamber with the inner cavity of the oxygen production inlet pipe (17) located at the top, and to connect the oxygen-enriched chamber at the upper position of the adjacent oxygen production chamber with the inner cavity of the oxygen production inlet pipe (17) that interferes with the oxygen production chamber, and the nitrogen extraction component (5) comprises a negative pressure pump (51), and the input end of the negative pressure pump (51) is connected to the oxygen-enriched chamber.

2. The high-purity oxygen production adsorption tower according to claim 1, characterized in that: The two inner side walls facing each other of the tower body (1) are both provided with docking through holes (113) distributed in a vertical direction, the docking through holes (113) comprising a first through hole (1131), a second through hole (1132) and a third through hole (1133), the first through hole (1131) being in communication with the air inlet cavity, the second through hole (1132) being fixedly connected with the end of the oxygen production inlet pipe (17), and in two adjacent oxygen production cavities, the third through hole (1133) is connected between the oxygen enrichment cavity corresponding to the upper oxygen production cavity and the second through hole (1132) corresponding to the lower oxygen production cavity through a connecting component (4).

3. The high-purity oxygen production adsorption tower according to claim 2, characterized in that: The communication assembly (4) comprises a communication main pipe (41) extending in a vertical direction and communication branch pipes (42) arranged side by side in the vertical direction. The communication main pipe (41) is connected to the communication branch pipe (42). One end of the communication branch pipe (42) away from the communication main pipe (41) is connected to the docking through hole (113) in a one-to-one correspondence. An oxygen-generating one-way valve (421) is arranged in the communication branch pipe (42) corresponding to the second through hole (1132). The communication main pipe (41) is also provided with air intake one-way valves (411) and sealing blocks (412) arranged at intervals in the vertical direction. Each air intake one-way valve (411) is arranged between two adjacent communication branch pipes (42). Each sealing block (412) is arranged between two adjacent communication branch pipes (42). Each communication branch pipe (42) except the end is located between the adjacent oxygen-generating one-way valves (421) and sealing blocks (412).

4. The high-purity oxygen production adsorption tower according to claim 3, characterized in that: The nitrogen extraction component (5) comprises a nitrogen extraction main pipe (52) extending in a vertical direction and nitrogen extraction branch pipes (53) distributed in sequence in the vertical direction; the nitrogen extraction main pipe (52) is connected to an input end of the negative pressure pump (51); each nitrogen extraction branch pipe (53) is connected one-to-one between a connecting branch pipe (42) corresponding to the second through hole (1132) and the nitrogen extraction main pipe (52); the nitrogen extraction branch pipe (53) is connected to a nitrogen extraction valve (531); and the nitrogen extraction branch pipe (53) is located on a side of the oxygen production one-way valve (421) away from the second through hole (1132).

5. The high-purity oxygen production adsorption tower according to claim 1, characterized in that: The tower body (1) is also provided with purge through holes (114) which are in one-to-one communication with the oxygen-enriched chambers. The purge through holes (114) are connected to purge valves (63) and are used to introduce inert gas.

6. The high-purity oxygen production adsorption tower according to claim 1, characterized in that: The rotating assembly (3) comprises a driven gear ring (31) coaxially sleeved outside the oxygen production inlet pipe (17) and fixedly connected to the oxygen production grid (2), a transmission gear (32) rotating around its own axis in the oxygen enrichment chamber and meshing with the driven gear ring (31), a driving gear (33) meshing with one of the driving gears (32) and located in the oxygen enrichment chamber, a rotating unit (34) driving the driving gear (33) to rotate, and a transmission unit (35) arranged between two adjacent transmission gears (32), wherein the two adjacent transmission gears (32) are transmission-connected via the transmission unit (35).

7. The high-purity oxygen production adsorption tower according to claim 6, characterized in that: The transmission unit (35) comprises two transmission wheels (351) coaxially fixedly connected to two adjacent transmission gears (32) and located outside the oxygen production chamber, and a transmission connecting rod (352) hinged between the two transmission wheels (351). The rotating assembly (3) further comprises a sealing cover (36), wherein the sealing cover (36) and the tower body (1) are enclosed to form a sealed chamber, wherein the transmission connecting rod (352) and the transmission wheel (351) are both located in the sealed chamber, and the transmission wheel (351) and the transmission gear (32) are fixedly connected via a transmission coaxial shaft (321), wherein the transmission coaxial shaft (321) seals and penetrates the side wall of the tower body (1).

8. The high-purity oxygen production adsorption tower according to claim 7, characterized in that: One end of the oxygen production grid (2) is provided with two inlets and outlets (221), the center line of the two inlets and outlets (221) intersects perpendicularly with the axis of the oxygen production inlet pipe (17), and the intersection point is the midpoint of the center line, a sealing ring (18) is fixed on the side wall of the tower body (1) facing the two inlets and outlets (221), the sealing ring (18) is provided with two connecting ports (181) distributed in the vertical direction, and the side wall of the tower body (1) is fixed with two connecting ports (181) corresponding to the two connecting ports (181) and located respectively at A feeding pipe (115) and a discharging pipe (116) are provided outside the tower body (1), wherein the feeding pipe (115) and the discharging pipe (116) are respectively detachably and hermetically connected with a feeding plug (117) and a discharging plug (118), wherein the movable path of the oxygen production grid frame (2) comprises a replacement station, wherein in the replacement station, the feeding pipe (115) is connected to one of the inlets and outlets (221) through a communication port (181) located at an upper portion, and the discharging pipe (116) is connected to the other inlet and outlet (221) through a communication port (181) located at a lower portion.

9. The high-purity oxygen production adsorption tower according to claim 8, characterized in that: A visual window (361) is provided on a side wall of the sealing cover (36) facing the transmission wheel (351), and a replacement mark (362) is provided on the visual window (361). A hinge shaft (353) is provided on a side of the transmission wheel (351) adjacent to the visual window (361), and an end of the transmission connecting rod (352) is hinged to the hinge shaft (353). At the replacement station, the hinge shaft (353) on at least one of the transmission wheels (351) faces the replacement mark (362).

10. The high-purity oxygen production adsorption tower according to any one of claims 1 to 8, characterized in that: The oxygen production inlet (171) is densely distributed at the bottom of the oxygen production inlet pipe (17); the oxygen production inlet (171) is fixedly connected to a downward main fork pipe (172); the main fork pipe (172) is fixedly connected to a branch pipe (173) distributed along the axial direction of the main fork pipe (172); the main fork pipe (172) and the branch pipe (173) are both provided with a diversion hole (174); the inner diameter of the diversion hole (174) is smaller than the outer diameter of the oxygen production molecular sieve.

Images