A rotary cutting pneumatic air intake distribution device and oxygen production equipment

Abstract

The present invention provides a rotary pneumatic air distribution device, which relates to the technical field of gas separation equipment and includes: an adsorption tank and an air distribution channel. The air distribution channel is disposed within the adsorption tank and is used to fill the adsorption tank with adsorbent. The bottom end of the air distribution channel is open and used for air intake. The channel wall of the air distribution channel is provided with multiple air outlet holes, and the angles between the air outlet holes and the vertical line are acute. The present invention also provides oxygen production equipment, including the rotary pneumatic air distribution device described above. The solution provided by the present invention can increase the service life of the adsorbent and is energy-saving and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of gas separation equipment, and in particular to a rotary pneumatic air intake distribution device and oxygen production equipment. Background Art

[0002] Most existing gas separation technologies use packed towers, that is, the tower is filled with adsorbents (such as zeolite molecular sieves for oxygen production), and the gases are separated through pressurized adsorption and low-pressure or vacuum desorption to enrich the required gases such as oxygen. Current oxygen production adsorption tanks usually use ordinary gas distribution methods to introduce the gas into the adsorption tank.

[0003] In actual use, the existing common gas distribution method will cause the gas to enter the adsorption tank from the bottom, generating a large airflow that can easily cause impact damage to the adsorbent, such as zeolite molecular sieve, and thus easily lead to pulverization of the zeolite molecular sieve, shortening its service life. Summary of the Invention

[0004] The purpose of the present invention is to provide a rotary pneumatic air intake distribution device and oxygen production equipment to solve the problems existing in the above-mentioned prior art, increase the service life of the adsorbent, and save energy and protect the environment.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a rotary cutting pneumatic air intake distribution device, comprising: an adsorption tank and an air distribution channel, the air distribution channel is arranged in the adsorption tank, the adsorption tank is used to fill the adsorbent, the bottom end of the air distribution channel is open and used for air intake, and a plurality of air outlet holes are opened on the channel wall of the air distribution channel, and the angle between the air outlet holes and the vertical line is an acute angle.

[0007] Preferably, the air distribution channel includes a disc air distribution device and an air distribution riser, the cross-sectional area of ​​the disc air distribution device is larger than the cross-sectional area of ​​the air distribution riser, the disc air distribution device is fixedly arranged in the adsorption tank, the disc air distribution device is horizontally arranged, the bottom end surface of the disc air distribution device is provided with a first air inlet, the first air inlet is fixed to and connected with an air inlet short pipe, the end of the air inlet short pipe away from the first air inlet extends out of the adsorption tank and is used to be connected with the air inlet pipe, the top surface of the disc air distribution device is provided with a first air outlet, the first air outlet is fixed with the air distribution riser, the air distribution riser is vertically arranged, the bottom end of the air distribution riser is open and connected to the first air outlet, the top end of the air distribution riser is closed, and a plurality of the air outlet holes are provided on the circumferential side walls of the disc air distribution device and the circumferential side walls of the air distribution riser.

[0008] Preferably, the disc air distribution device and the air distribution riser are both covered with metal filter screens on their circumferences, and the metal filter screens are fixed with pipe clamps.

[0009] Preferably, a plurality of the air outlet holes are evenly arranged on the channel wall of the air distribution channel.

[0010] Preferably, the angle between the center line of the air outlet and the vertical line is greater than 25 degrees and less than 35 degrees.

[0011] Preferably, the adsorption tank includes a cylinder, an upper head and a lower head, the lower head and the upper head are fixedly connected to the lower end and the upper end of the cylinder respectively, the air inlet short pipe passes through the center hole of the lower head, the air inlet short pipe and the lower head are welded and fixed, the top end of the air inlet short pipe is welded and fixed to the disc air distribution device, and the air inlet short pipe is flange-connected to the air inlet pipe.

[0012] Preferably, the disc air distribution device, the air distribution riser and the adsorption tank are all coaxially arranged.

[0013] The present invention also provides an oxygen production device, comprising the rotary pneumatic air inlet distribution device as described above.

[0014] Compared with the prior art, the present invention has achieved the following technical effects:

[0015] The air distribution channel in the rotary cutting pneumatic air intake distribution device provided by the present invention has multiple air outlet holes on the channel wall, and the angle between the air outlet holes and the vertical line is an acute angle. The air intake direction in the adsorption tank is changed from bottom air intake to scattered rotary cutting air distribution in the tank, generating multiple air flows. The air flow is uniform and smooth, and will not cause impact damage such as movement to the adsorbent. When applied to oxygen production equipment, it prevents the zeolite molecular sieve from being pulverized and extends the service life of the molecular sieve.

[0016] Furthermore, the rotary pneumatic air inlet distribution device provided by the present invention has an energy-saving effect. The ordinary air distribution method will cause the gas to enter the adsorption tank from the bottom, which is easy to generate a large airflow. The airflow passes through the filled molecular sieve unevenly and has poor stability. The gas and the molecular sieve are not in sufficient contact, which prolongs the adsorption and desorption time. If the present invention is to produce the same concentration and output of oxygen under the same working conditions, it will take a long time, which increases the load operation time of the equipment. The air distribution channel in the rotary pneumatic air inlet distribution device provided by the present invention includes a disc air distribution device and a gas distribution riser. The disc air distribution device enlarges the cross-sectional area of ​​the gas entering the lower air inlet pipe, so that the airflow scatters a smooth and uniform rotary airflow at the bottom of the adsorption tank; the gas distribution riser further scatters the gas entering from the bottom to the top through the holes of the rotary cutting angle to form a smooth rotary airflow, so that the airflow scattered in the circular tank body rotates and rises from the bottom to the top through the rotary pneumatic air distribution device. The flow route is longer than that of the ordinary air distribution method, which is easy to fully contact with the molecular sieve, can shorten the adsorption and desorption time, reduce the load operation time of the equipment, and thus achieve energy-saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic structural diagram of the pneumatic air inlet distribution device for rotary cutting provided in Example 1;

[0019] Figure 2 Schematic diagram of the structure of the air intake channel;

[0020] Figure 3 This is a structural diagram of the direction in which the air outlet is opened on the channel wall;

[0021] In the figure: 1. Adsorption tank; 11. Cylinder; 12. Upper head; 13. Lower head; 14. Air outlet; 2. Air distribution channel; 21. Disc air distribution device; 22. Air distribution riser; 23. Air outlet; 3. Metal filter; 4. Air inlet short pipe; 5. Air inlet pipe; 6. Exhaust pipe; 7. Pillar; 8. Adsorbent. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a rotary pneumatic air intake distribution device and oxygen production equipment to solve the problems existing in the above-mentioned prior art, increase the service life of the adsorbent, and save energy and protect the environment.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] This embodiment provides a rotary pneumatic air distribution device, which is suitable for the air distribution of PSA and VPSA oxygen and nitrogen generators. Figures 1 to 3As shown, it includes: an adsorption tank 1 and an air distribution channel 2, the air distribution channel 2 is arranged in the adsorption tank 1, the adsorption tank 1 is used to fill the adsorbent 8, the bottom end of the air distribution channel 2 is open and used for air intake, and a plurality of air outlet holes 23 are provided on the channel wall of the air distribution channel 2. The angle between the air outlet holes 23 and the vertical line is an acute angle. The air distribution channel 2 is embedded in the adsorbent 8 to facilitate scattering of airflow to the adsorbent 8. The channel wall of the air distribution channel 2 has a certain thickness, and the air outlet holes 23 extend obliquely upward from the inner wall of the air distribution channel 2 to the outer wall of the air distribution channel 2. The scattered airflow flows obliquely upward, and after hitting the inner wall of the absorption tower, it changes its original direction and forms a vortex from bottom to top along the circular inner wall.

[0027] The air distribution channel 2 in the rotary pneumatic air distribution device provided in this embodiment has a plurality of air outlet holes 23 provided on the channel wall. The angle between the air outlet holes 23 and the vertical line is an acute angle. The air intake direction in the adsorption tank 1 is changed from bottom air intake to scattered rotary air distribution in the tank, generating multiple air flows. The air flow is uniform and smooth, and will not cause impact damage such as movement to the adsorbent 8. When applied to oxygen production equipment, it prevents the zeolite molecular sieve from being pulverized and extends the service life of the molecular sieve.

[0028] Furthermore, the air distribution channel 2 includes a disc air distribution device 21 and an air distribution riser 22. The inner cavity of the disc air distribution device 21 is connected to the channel in the air distribution riser 22. The cross-sectional area of ​​the disc air distribution device 21 is larger than the cross-sectional area of ​​the air distribution riser 22. The disc air distribution device 21 is fixedly arranged in the adsorption tank 1. The disc air distribution device 21 is arranged horizontally. The bottom end surface of the disc air distribution device 21 is provided with a first air inlet. An air inlet short pipe 4 is fixed and connected to the first air inlet. The end of the air inlet short pipe 4 away from the first air inlet extends from the adsorption tank 1 and is used to communicate with the air inlet pipe 5. The top surface of the disc air distribution device 21 is provided with a first air outlet. The air distribution riser 22 is fixed at the first air outlet. The air distribution riser 22 is arranged vertically. The bottom end of the tube 22 is open and connected to the first gas outlet, and the top end of the gas distribution riser 22 is closed. A plurality of gas outlet holes 23 are provided on the peripheral side walls of the disc gas distribution device 21 and the peripheral side walls of the gas distribution riser 22. The gas enters the adsorption tank 1 in a sequence from bottom to top. In the early stage of adsorption, part of the gas first passes through the disc gas distribution device 21 to achieve primary gas distribution, and part first passes through the gas distribution riser 22 to achieve secondary gas distribution. In the later stage of adsorption, the gas enters the disc gas distribution device 21 and the gas distribution riser 22 for gas distribution at the same time. In this way, the gas distribution from bottom to top must be kept uniform. The number and aperture of holes drilled in the gas distribution riser 22 and the disc gas distribution device 21 need to be comprehensively considered. The height of the disc gas distribution device 21 is 150 mm, and the diameter is 3 / 4 of the diameter of the adsorption tank 1.

[0029] The rotary pneumatic air inlet distribution device provided in this embodiment has an energy-saving effect. The ordinary air distribution method will cause the gas to enter the adsorption tank 1 from the bottom, which is likely to generate a large airflow. The airflow passes through the filled molecular sieve unevenly and has poor stability. The gas and the molecular sieve are not in sufficient contact, which prolongs the adsorption and desorption time. If the present invention is to achieve the same concentration and output of oxygen under the same working conditions, it will take a long time, which increases the load operation time of the equipment. The air distribution channel 2 in the rotary cutting pneumatic air intake distribution device provided by the present invention includes a disc air distribution device 21 and an air distribution riser 22. The disc air distribution device 21 enlarges the cross-sectional area of ​​the gas entering the lower air intake pipe 5, so that the airflow is scattered into a smooth and uniform rotary cutting airflow at the lower part of the adsorption tank 1; the air distribution riser 22 further scatters the gas entering from the bottom to the top through the holes of the rotary cutting angle to form a smooth rotary cutting airflow, so that the airflow scattered in the circular tank body is rotated and risen from bottom to top through the rotary cutting pneumatic air intake distribution device. The flow route is longer than that of the ordinary air distribution method, which is easy for the molecular sieve to fully contact, can shorten the adsorption and desorption time, reduce the equipment load operation time, and thus achieve energy-saving effects.

[0030] Furthermore, the disc air distribution device 21 and the air distribution riser 22 are both covered with a metal filter 3, preferably a stainless steel filter. The metal filter 3 is fixed with a pipe clamp. The metal filter 3 further filters the air and prevents the adsorbent 8 from reversely entering the air distribution channel 2 from the air outlet 23, thereby facilitating the adsorption and separation of the air by the adsorption tank 1.

[0031] Furthermore, a plurality of air outlet holes 23 are evenly formed on the channel wall of the air distribution channel 2 .

[0032] Furthermore, the air outlet 23 can also be configured as a spirally curved channel, with the center line being a spiral line, so as to form a rotary cutting airflow.

[0033] Furthermore, the angle between the center line of the air outlet 23 and the vertical line is greater than 25 degrees and less than 35 degrees, preferably 30 degrees.

[0034] Furthermore, the adsorption tank 1 includes a cylinder 11, an upper head 12 and a lower head 13. The lower head 13 and the upper head 12 are fixedly connected to the lower end and the upper end of the cylinder 11 respectively. The air inlet short pipe 4 passes through the center hole of the lower head 13. The air inlet short pipe 4 and the lower head 13 are welded and fixed. The top of the air inlet short pipe 4 is welded and fixed to the disc air distribution device 21. Welding is performed in accordance with the welding process requirements. The verticality is within the allowable error and must meet the use requirements. The air inlet short pipe 4 and the air inlet pipe 5 are flange-connected. The disc air distribution device 21 is welded and fixed in the lower head 13. The bottom of the disc air distribution device 21 is welded to the lower head 13 in accordance with the welding process requirements. An adsorbent 8 is filled above the disc air distribution device 21. The disc air distribution device 21 is used to support the adsorbent 8. There is no adsorbent 8 below the disc air distribution device 21.

[0035] Furthermore, the disc air distribution device 21 , the air distribution riser 22 and the adsorption tank 1 are all coaxially arranged, and the air distribution riser 22 is perpendicular to the upper end surface of the disc air distribution device 21 .

[0036] Furthermore, during the manufacturing process, the air outlet holes 23 of the disc air distribution device 21 are first evenly marked with 10mm*10mm lines, and then drilled at a 30-degree angle according to rotary cutting. The number and diameter of the holes are calculated according to the air intake volume and pressure.

[0037] Example 2

[0038] This embodiment also provides an oxygen production device, including the rotary pneumatic air intake distribution device described in the first embodiment.

[0039] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A pneumatic air distribution device for rotary cutting, characterized by: include: An adsorption tank and an air distribution channel, wherein the air distribution channel is arranged in the adsorption tank, the adsorption tank is used to fill the adsorbent, the bottom end of the air distribution channel is open and used for air intake, a plurality of air outlet holes are opened on the channel wall of the air distribution channel, and the angle between the air outlet holes and the vertical line is an acute angle; the air distribution channel includes a disc air distribution device and an air distribution riser, the cross-sectional area of ​​the disc air distribution device is larger than the cross-sectional area of ​​the air distribution riser, the disc air distribution device is fixedly arranged in the adsorption tank, the disc air distribution device is horizontally arranged, and the bottom end surface of the disc air distribution device is A first air inlet is provided, and an air inlet short pipe is fixed and connected to the first air inlet, and one end of the air inlet short pipe away from the first air inlet extends out of the adsorption tank and is used to be connected to the air inlet pipe. A first air outlet is provided on the top surface of the disc air distribution device, and the air distribution riser is fixed at the first air outlet. The air distribution riser is vertically arranged, and the bottom end of the air distribution riser is open and connected to the first air outlet. The top end of the air distribution riser is closed, and a plurality of the air outlet holes are provided on the circumferential side walls of the disc air distribution device and the circumferential side walls of the air distribution riser.

2. The pneumatic air distribution device for rotary cutting according to claim 1, characterized in that: A plurality of air outlet holes are evenly arranged on the channel wall of the air distribution channel.

3. The pneumatic air distribution device for rotary cutting according to claim 1, characterized in that: The circumference of the disc air distribution device and the air distribution riser are both covered with a metal filter screen, and the metal filter screen is fixed with a pipe clamp.

4. The pneumatic air distribution device for rotary cutting according to claim 1, characterized in that: The angle between the center line of the air outlet and the vertical line is greater than 25 degrees and less than 35 degrees.

5. The pneumatic air distribution device for rotary cutting according to claim 1, characterized in that: The adsorption tank includes a cylinder, an upper head and a lower head. The lower head and the upper head are fixedly connected to the lower end and the upper end of the cylinder respectively. The air intake short pipe passes through the center hole of the lower head. The air intake short pipe and the lower head are welded and fixed. The top end of the air intake short pipe is welded and fixed to the disc air distribution device. The air intake short pipe and the air intake pipe are connected by a flange.

6. The pneumatic air distribution device for rotary cutting according to claim 1, characterized in that: The disc air distribution device, the air distribution riser and the adsorption tank are all coaxially arranged.

7. An oxygen production equipment, characterized in that: The invention comprises the rotary cutting pneumatic air inlet distribution device according to any one of claims 1 to 6.

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