Gas distribution device

Abstract

The utility model provides a gas distribution device, which is used for introducing reaction gas into a reaction device to carry out gas-liquid mixing reaction, and comprises a distribution pipe provided with a mounting and fixing part and a gas distribution part, the mounting and fixing part is mounted and fixed on a barrel of the reaction device, and the gas distribution part is mounted and fixed on the barrel of the reaction device. The gas distribution part extends into the cylinder body and is positioned below a lowermost stirring paddle which is lower than the mounting and fixing part in horizontal position and forms a stirring device in the reaction device, and a bending part is formed between the mounting and fixing part and the gas distribution part. By adopting the gas distribution device disclosed by the utility model, the height of the reaction equipment cannot be increased, and the distribution pipe (especially the gas distribution part) can be prevented from being scratched or deformed in the mounting and dismounting processes.

Description

Technical Field

[0001] This utility model relates to a gas distribution device, specifically, a gas distribution device used in reaction equipment such as bioreactors in industries such as biology, medicine, and chemicals where reaction gases need to be introduced. Background Art

[0002] Currently, in industries such as biology, medicine, and chemicals, reaction equipment that requires the introduction of reaction gases is commonly used. Most of these devices include agitators, and the reaction tube, forming the gas distribution device for the reaction gases, is typically positioned below the agitator blades at the bottom of the agitator. However, since the cylindrical section of the reaction equipment near the bottom is a welded area, it's usually impossible to insert the reaction tube through a hole in this welded section. Therefore, the insertion port on the cylindrical section is located above the welded area, typically at the same level as or slightly above the bottom agitator blades. On the other hand, in existing reaction equipment, the reaction tubes in the gas distribution devices are usually made by drilling numerous vent holes in a steel pipe. These holes are located at the top, middle, and bottom of the pipe section, arranged in a staggered pattern. This arrangement is more conducive to the uniform distribution of gas within the reaction equipment. However, the holes drilled in the steel pipe are very small in diameter and very dense. After a period of use, they need to be removed for cleaning, so the distribution pipe needs to be designed with an easily disassembled structure. For this reason, existing distribution pipes are generally formed as straight pipes, which facilitates insertion and removal. Since the insertion port of the distribution pipe on the aforementioned cylinder is at the same horizontal plane as or slightly higher than the horizontal plane of the lowest layer of the stirring blades in the aforementioned mixing device, and the distribution pipe needs to be inserted below the lowest layer of the stirring blades, the distribution pipe must be inserted obliquely from the insertion port on the cylinder towards the lower part of the stirring blades. This requires, on the one hand, that the front end of the distribution pipe be close to the cylinder opposite the cylinder with the insertion port (to ensure that the gas distributed from the distribution pipe is fully and evenly covered in the diameter direction of the cylinder), and on the other hand, that the front end of the distribution pipe not contact the bottom of the cylinder. This necessitates increasing the distance between the lowest layer of the stirring blades and the bottom of the cylinder, which leads to the problem of increasing the height of the cylinder.

[0003] In existing technologies (such as the reaction apparatus disclosed in CN212770765U), there is a gas distribution device that is difficult to disassemble. It requires removing the upper head and stirring device of the bioreactor (which serves as the reaction apparatus) before the aeration channel, acting as the distribution pipe, can be removed, making the operation particularly cumbersome. Furthermore, it is not conducive to cleaning; a single spray device cannot simultaneously clean the inner and outer surfaces of the aeration channel, requiring the installation of multiple spray devices, which increases costs.

[0004] In addition, the existing detachable distribution tubes have a very high polishing precision on their outer surface. Due to their small diameter and thin walls, the gas distribution parts with vent holes are often scratched or deformed when inserted or removed for cleaning, resulting in uneven gas distribution. Utility Model Content

[0005] This utility model is a solution to the problems existing in the prior art, aiming to provide a gas distribution device that does not increase the height of the equipment and avoids being scratched or deformed during installation and disassembly.

[0006] The first gas distribution device provided by this utility model is a gas distribution device for introducing reaction gas into a reaction device for gas-liquid mixing reaction. It includes a distribution pipe having a mounting and fixing part and a gas distribution part. The mounting and fixing part is mounted and fixed on the cylinder of the reaction device. The gas distribution part extends into the cylinder and is located below the lowest stirring blade of the stirring device constituting the stirring device in the reaction device, with its horizontal position lower than that of the mounting and fixing part. The characteristic feature is that a curved part is formed between the mounting and fixing part and the gas distribution part.

[0007] The second gas distribution device provided by this utility model is based on the first gas distribution device, wherein the curved part is integrally formed by bending the distribution tube.

[0008] The third gas distribution device provided by this utility model is based on the first or second gas distribution device, and further includes a sleeve fitted on the outer periphery of the distribution tube. The sleeve is pre-fitted onto the end of the distribution tube near the mounting and fixing part, and its length is set to at least cover a part of the mounting and fixing part and a part of the curved part.

[0009] The fourth gas distribution device provided by this utility model is based on the third gas distribution device, wherein the sleeve is bent and deformed together with the distribution tube in a state in which it is pre-installed on the distribution tube.

[0010] The fifth gas distribution device provided by this utility model is based on the first or second gas distribution device, wherein the insertion and extraction process of the distribution tube relative to the cylinder is simulated by establishing a 3D model.

[0011] The sixth gas distribution device provided by this utility model is based on the first or second gas distribution device, wherein the gas distribution device is provided on each side of the stirring blade in a manner that clamps the stirring blade.

[0012] The seventh gas distribution device provided by this utility model is based on the first or second gas distribution device. The gas distribution device is installed and fixed on the cylinder by an installation assembly, which includes a flange, a pressure cap, an end cap, a positioning plate, and a sealing ring.

[0013] The eighth gas distribution device provided by this utility model is based on the seventh gas distribution device, wherein the flange has a tapered slope on its inner surface and its cut is cut to the same shape as the inner surface of the cylinder.

[0014] The ninth gas distribution device provided by this utility model is based on the seventh gas distribution device. The flange is connected to the pressure cap and the end cap with screws and cap nuts to press the sealing ring to seal the entire device.

[0015] The tenth gas distribution device provided by this utility model is based on the seventh gas distribution device, wherein the sleeve is welded to the end cap to seal the gap between the sleeve and the distribution pipe.

[0016] The gas distribution device provided by this utility model will not increase the height of the reaction equipment, and will also prevent the distribution pipe (especially its gas distribution part) from being scratched or deformed during installation and disassembly. Attached Figure Description

[0017] Figure 1 This is an elevation view showing the positional relationship between the gas distribution device and the reaction equipment components of this utility model;

[0018] Figure 2 This is a plan view showing the positional relationship between the gas distribution device and the reaction equipment components of this utility model.

[0019] Figure 3 This is an enlarged schematic diagram showing the mounting components of the gas distribution device of this utility model. Detailed Implementation

[0020] The technical solution and effects of this utility model are described in detail below through specific embodiments. The following embodiments are for illustrative purposes only, and the utility model is not limited to the described embodiments or examples. Simple modifications made to this utility model based on the concept of this utility model are all within the scope of protection claimed by this utility model.

[0021] The gas distribution device 10 provided by this utility model, such as Figure 1 and Figure 2 As shown, it is a gas distribution device that is installed on the cylinder 11 of a biomedical-grade reaction device, which serves as a reaction apparatus, with a portion inserted into the cylinder 11.

[0022] The gas distribution device 10 includes a distribution pipe 12 and a mounting component 13 that detachably mounts and fixes the distribution pipe 12 onto the cylinder 11.

[0023] The distribution pipe 12 includes a mounting and fixing part 12a, a bending part 12b, a gas distribution part 12c, and an end cap 12d. The distribution pipe 12 is formed by bending a steel pipe. The mounting and fixing part 12a has a flared flat connector 12e at its end, which connects to a pipeline (not shown) supplying the reaction gas. The bending part 12b is formed by bending the distribution pipe 12 to the relative position of the gas distribution part 12c with the bottommost stirring blade 14a of the stirring device 14 located inside the cylinder 11 of the reaction equipment. In other words, by bending the distribution pipe 12 to form the bending part 12b, the gas distribution part 12c is positioned precisely below the bottommost stirring blade 14a of the stirring device 14 when the mounting and fixing part 12a is mounted and fixed to the cylinder 11. The gas distribution section 12c has multiple vent holes 12f on its outer peripheral surface. The drilling positions of the vent holes 12f are staggered at the upper, middle, and lower parts of the cross-section of the gas distribution section 12c. This arrangement facilitates the uniform distribution of the reaction gas delivered through the distribution pipe 12 within the reaction device. The specific drilling positions and the number of vent holes 12f are determined based on different reaction devices and related processes. They are usually determined through calculation and simulation to ensure a more uniform gas distribution and better gas-liquid mixing within the reaction device; no specific limitations are made here. The end cap 12d is fixed (e.g., welded) to the end of the distribution pipe 12 near the gas distribution section 12c, acting as a plug. Furthermore, during the design phase, a 3D model of the distribution pipe 12 is created to simulate the insertion and removal process relative to the cylinder 11, ensuring smooth disassembly of the distribution pipe 12.

[0024] In addition, the gas distribution device 10 of this utility model also includes a sleeve 15 fitted around the outer periphery of the distribution pipe 12. The sleeve 15 serves to reinforce and protect the distribution pipe 12, and its material can be the same as or different from that of the distribution pipe 12. The sleeve 15 is pre-fitted onto the end of the distribution pipe 12 near the mounting and fixing part 12a. Its length is set to at least cover a part of the mounting and fixing part 12a and a part of the bend 12b. Alternatively, its length can be set to cover the entire mounting and fixing part 12a and the entire bend 12b, or the length of the sleeve 15 can be set so as not to cover the gas distribution part 12c where the vent hole 12f is provided. The end of the sleeve 15 near the bend 12b is provided with a cap 15a. Specifically, the cap 15a has a hole, and the distribution pipe 12 with the sleeve 15 is passed through the cap 15a and then the cap 15a is welded to the sleeve 15. The sleeve 15 is bent and deformed together with the distribution tube 12 while it is pre-fitted onto the distribution tube 12. In other words, the sleeve 15 and the distribution tube 12 are bent and formed together.

[0025] In addition, the gas distribution device 10 of this utility model, such as Figures 1 to 3 As shown, the device is mounted and fixed to the cylinder 11 by an installation assembly 16. Specifically, the installation assembly 16 includes a flange 16a, a gland 16b, an end cap 16c, a positioning plate 16d, and a sealing ring 16e. The gland 16b is a flat cap with bolt mounting holes. The flange 16a has a tapered slope on its inner surface, and its cut is cut to the same shape as the inner surface of the cylinder 11. The end cap 16c has a sealing groove for installing and tightening the sealing ring 16e. Furthermore, the flange 16a is connected to the gland 16b and the end cap 16c by screws 17 and cap nuts 18 to tighten the sealing ring 16e and seal the entire device. The positioning plate 16d is welded to the flange 16a for positioning during the installation of the distribution pipe 12. The sleeve 15 is welded to the end cap 16c to seal the gap between the sleeve 15 and the distribution pipe 12, preventing media from entering.

[0026] The gas distribution device 10 of this utility model, such as Figure 2 As shown, one is provided on each side of the stirring blade 14a in such a way that it is sandwiched between the stirring blade 14a.

[0027] When cleaning the inside of the reaction device, the stirring blade 14a is soaked in cleaning solution. After soaking, the cleaning solution on the distribution pipe 12 flows down the angle to the bottom of the reaction device and is discharged into the external pipe (not shown).

[0028] On the other hand, after the internal cleaning is completed, the gas distribution device 10 is extracted from the reaction device, and the distribution pipe 12 is cleaned separately. After cleaning, it is purged with compressed air to prevent the vent from being blocked. After cleaning, the positioning plate 16d on the flange 16a is located first, and after positioning, the distribution pipe 12 is slowly installed into the distribution device according to the installation sequence. Finally, the fasteners are tightened to seal, and the flange 16a and the pressure cap 16b are pressed together to prevent leakage.

[0029] The gas distribution device 10 of this invention has the following advantages:

[0030] 1) In the gas distribution device 10 of this utility model, the distribution pipe 12 is provided with a bend 12b between the mounting and fixing part 12a and the gas distribution part 12c. Compared with the prior art without the bend, the gas distribution part 12c can be easily placed below the stirring blade 14a of the lowest layer of the stirring device 14 without increasing the height of the cylinder 11 of the reaction device.

[0031] 2) The gas distribution device 10 of this utility model is provided with a sleeve 15 fitted around its distribution pipe 12. In this way, the distribution pipe 12 of the gas distribution device 10 can be prevented from being scratched or deformed during installation and disassembly.

[0032] 3) The specific location and number of vent holes 12f opened in the gas distribution section 12c of the gas distribution device 10 of this utility model are determined according to different reaction devices and their related processes (usually through calculation and simulation). This makes the distribution of reaction gas inside the reaction device more uniform and more conducive to gas-liquid mixing.

[0033] 4) In the mounting assembly 16 that installs and fixes the gas distribution device 10 of this utility model, the inner surface of the flange 16a is provided with a tapered slope, and its cut is cut to the same shape as the inner surface of the cylinder 11 of the reaction device. This structure allows for easy cleaning of the interior of the flange 16a.

[0034] 5) In the mounting assembly 16 used to install and fix the gas distribution device 10 of this utility model, a cap nut 18 is used to fasten the flange 16a. This prevents dust and dirt from entering the thread gap between the fastening screw 17 and the flange 16a.

[0035] 6) During the design phase, a 3D model of the distribution pipe 12 will be established to simulate the process of the distribution pipe 12 being inserted into and removed from the cylinder 11. This ensures that the distribution pipe 12 can be disassembled smoothly.

[0036] The implementation scheme of the gas distribution device 10 of this utility model can be further modified as follows.

[0037] In the above embodiment, the end cap 12d is formed separately and fixed to one end of the gas distribution section 12c of the distribution pipe 12 by welding. However, the end cap 12d can also be formed integrally with the distribution pipe 12 (the gas distribution section 12c). In addition, multiple vent holes 12f can also be provided on the end cap 12d.

[0038] In the above embodiment, the gas distribution device 10 is provided on each side of the stirring blade 14a, sandwiching the stirring blade 14a. However, only one set may be provided.

[0039] In the above embodiment, both gas distribution devices 10 are installed and fixed on the same side of the cylinder 11. However, they can also be installed and fixed on different sides of the cylinder 11 (such as opposite sides).

[0040] In the above embodiment, the mounting assembly 16 for installing the fixed gas distribution device 10 uses a screw and nut connection. However, a structure that directly connects to the cylinder 11 via threads can also be used.

[0041] In the above embodiments, this invention is applied to biomedical-grade sanitary reaction equipment. It can also be applied to other reaction equipment in the biological, pharmaceutical, and chemical industries.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction.

Claims

1. A gas distribution device for introducing reactive gases into a reaction apparatus for gas-liquid mixing reaction, comprising a distribution pipe having a mounting and fixing part and a gas distribution part, the mounting and fixing part being mounted and fixed on the cylinder of the reaction apparatus, the gas distribution part extending into the cylinder and located horizontally below the mounting and fixing part, below the lowest layer of stirring blades constituting a stirring device within the reaction apparatus, characterized in that... A bend is formed between the mounting and fixing part and the gas distribution part.

2. The gas distribution device as described in claim 1, characterized in that, The curved section is integrally formed by bending the distribution tube.

3. The gas distribution device as described in claim 1 or 2, characterized in that, It also includes a sleeve fitted around the outer periphery of the distribution tube. The sleeve is pre-fitted onto one end of the distribution tube near the mounting and fixing part, and its length is set to at least cover a portion of the mounting and fixing part and a portion of the curved part.

4. The gas distribution device as described in claim 3, characterized in that, The sleeve is bent and deformed together with the distribution tube in the state of being pre-fitted onto the distribution tube.

5. The gas distribution device as described in claim 1 or 2, characterized in that, The insertion and extraction process of the distribution pipe relative to the cylinder is simulated by establishing a 3D model.

6. The gas distribution device as described in claim 1 or 2, characterized in that, It is provided on each side of the stirring blade in a manner that clamps the stirring blade.

7. The gas distribution device as described in claim 1 or 2, characterized in that, It is mounted and fixed to the cylinder by a mounting assembly, which includes a flange, a gland, an end cap, a positioning plate, and a sealing ring.

8. The gas distribution device as described in claim 7, characterized in that, The flange has a tapered slope on its inner surface, and its cut is cut to the same shape as the inner surface of the cylinder.

9. The gas distribution device as described in claim 7, characterized in that, The flange is connected to the gland and the end cap by screws and cap nuts to press the sealing ring to seal the entire device.

10. The gas distribution device as claimed in claim 7, characterized in that, It also includes a sleeve fitted around the outer periphery of the distribution pipe. The sleeve is pre-fitted onto one end of the distribution pipe near the mounting and fixing part, and its length is set to at least cover a portion of the mounting and fixing part and a portion of the bent part. The sleeve is welded to the end cap to seal the gap between the sleeve and the distribution pipe.

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