Online cleaning system and method for gas distributor

Abstract

The invention discloses an on-line cleaning system and method for a gas distributor, and relates to the technical field of biological fermentation, the on-line cleaning system comprises a switch valve, a metal hose, a blind plate, a driving mechanism and a cleaning mechanism, the switch valve is installed at an opening which is formed in a bioreactor and used for allowing the gas distributor to enter and exit, and one end of the metal hose is connected with the switch valve; a pipe cavity for the gas distributor to penetrate through is formed in the metal hose, the blind plate is detachably installed at one end of the metal hose and detachably connected with the gas distributor, and the driving mechanism is detachably connected with the blind plate and used for driving the blind plate to drive the gas distributor to enter and exit from the bioreactor. And the cleaning mechanism is used for cleaning the gas distributor removed from the bioreactor. According to the invention, the operation of bioreactor shutdown, system gas replacement, manhole ventilation and the like before cleaning is not needed, the gas distributor is cleaned on line, and the problem that the gas distribution efficiency of the gas distributor is reduced due to protein pollution is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biological fermentation, and in particular to an online cleaning system and method for a gas distributor. BACKGROUND

[0002] The gas biological fermentation technology is a new technology for preparing organic substances by biological fermentation of carbon monoxide gas. A gas distributor is generally arranged at the bottom of a biological reactor, and the gas distributor uniformly distributes gas into the reactor. The gas distributor is immersed in fermentation mash, and a certain amount of bacterial protein exists in the mash. Due to factors such as fluctuation of gas inlet pressure, a part of the bacterial protein enters the inside of the gas distributor or the outer surface of the gas distributor, which affects the gas distribution efficiency and causes an impact on normal propagation and growth metabolism of the bacterial body in the biological reactor.

[0003] At present, the gas distributor is generally seriously polluted, and the biological reactor can be cleaned only when it is shut down. During cleaning, the entire system needs to be completely replaced with gas, a manhole needs to be opened for ventilation, and manual cleaning can be performed. This cleaning method requires a long time and has a large cleaning difficulty, and the cleaning is not thorough. On the other hand, the restart time is prolonged, and the economic benefit of the product is greatly affected. SUMMARY

[0004] To solve the above problems, the present application provides an online cleaning system and method for a gas distributor.

[0005] The present application provides an online cleaning system for a gas distributor, which comprises a switch valve, a metal hose, a blind plate, a driving mechanism and a cleaning mechanism. The switch valve is installed at an opening of a biological reactor for the gas distributor to enter or exit. One end of the metal hose is connected with the switch valve. The metal hose is provided with a lumen for the gas distributor to pass through. The blind plate is detachably installed at the end of the metal hose away from the switch valve. The blind plate is detachably connected with the gas distributor passing through the metal hose. The driving mechanism is detachably connected with the blind plate. The driving mechanism is used to drive the blind plate to drive the gas distributor to enter or exit the biological reactor. The cleaning mechanism is spaced apart from the biological reactor. The cleaning mechanism is used to clean the gas distributor removed from the biological reactor.

[0006] In some embodiments, the maximum extension length of the metal hose is not less than the axial length of the gas distributor.

[0007] In some embodiments, the switch valve is used to close the opening when the gas distributor is removed from the biological reactor.

[0008] In some embodiments, the driving mechanism comprises a power member and a connecting member. The power member is spaced apart from the blind plate. The connecting member is connected between the power member and the blind plate. The power member is used to drive the gas distributor to enter or exit the biological reactor and the cleaning mechanism.

[0009] In some embodiments, the blind plate is provided with a hook, the power element is an electric hoist, the hook of the electric hoist is detachably connected with the hook, and the driving mechanism further comprises an auxiliary lifting belt, the auxiliary lifting belt suspends a part of the metal hose close to the switch valve.

[0010] In some embodiments, the cleaning mechanism comprises a cleaning tank, a plurality of medium pipes and a gas blowing assembly, the cleaning tank is spaced apart from the bioreactor, the cleaning tank is provided with a slot, the slot is used for the gas distributor to enter and exit, the plurality of medium pipes are connected with the cleaning tank, and the plurality of medium pipes are used for sending cleaning medium into the cleaning tank, the gas blowing assembly comprises a gas pipe and a gas source connected with the gas pipe, and the gas pipe is provided with a plurality of gas ports located in the cleaning tank.

[0011] In some embodiments, the medium pipe is provided with an adjusting valve and a float valve, and the float valve is located in the cleaning tank.

[0012] In some embodiments, the plurality of medium pipes comprise a first medium pipe for conveying alkali solution, a second medium pipe for conveying acid solution and a third medium pipe for conveying desalted water.

[0013] In some embodiments, the alkali solution conveyed by the first medium pipe is a sodium hydroxide solution with a concentration of 1%-10%, and the acid solution conveyed by the second medium pipe is a citric acid solution with a concentration of 1%-10%.

[0014] A gas distributor online cleaning method, which applies the gas distributor online cleaning system, the gas distributor online cleaning method comprising: under the condition that the driving mechanism is connected with the blind plate, the driving mechanism pulls the gas distributor out of the bioreactor; the end of the gas distributor is pulled to the switch valve, and the switch valve is switched to the closed state; after the switch valve is switched to the closed state, the connection between the blind plate and the metal hose is released, and the driving mechanism drives the blind plate to move the gas distributor to the cleaning mechanism; after the gas distributor moves to the cleaning mechanism, the cleaning mechanism cleans the gas distributor; after the gas distributor is cleaned, the driving mechanism moves the gas distributor into the metal hose, and connects the end of the blind plate with the metal hose; when the gas distributor moves to the position of the switch valve, the switch valve is opened, and the gas distributor is returned to the bioreactor.

[0015] The application has the following advantages: the gas distributor online cleaning system comprises a switch valve, a metal hose, a blind plate, a driving mechanism and a cleaning mechanism, the gas distributor is arranged at the bottom of the inner cavity of the bioreactor, the gas distributor is detachably connected with the bioreactor by flange connection, the gas distributor can enter and exit the bioreactor along the axial direction, when the gas distribution efficiency of the gas distributor is insufficient due to the protein of the bacteria, the driving mechanism is connected with the blind plate connected with the gas distributor, the driving mechanism then pulls the gas distributor out of the bioreactor, and after the gas distributor is pulled out of the bioreactor, the switch valve is switched to the closed state, which can avoid the adverse accidents of leakage of a large amount of fermentation mash in the bioreactor during subsequent operation, after the connection between the blind plate and the metal hose is released, the metal hose can be manually pushed back, then the driving mechanism moves the gas distributor into the cleaning mechanism, the bioreactor is cleaned by the cleaning mechanism, after cleaning, the gas distributor is returned to the original working position by the driving mechanism; the gas distributor online cleaning system of the application is used for cleaning the gas distributor of the bioreactor, without the need for bioreactor shutdown, system gas replacement, manhole ventilation and other operations before cleaning, the gas distributor is cleaned online, the problem of reduced gas distribution efficiency caused by protein pollution of the gas distributor is improved, the technical difficulty of leakage of fermentation liquid during online insertion and pulling of the irregular tube bundle type gas distributor is improved, the normal growth, reproduction and metabolism of the bacteria in the bioreactor are ensured, and the normal production of the bioreactor is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description only constitute some embodiments of the present application.

[0017] Figure 1 A distribution diagram of the gas distributor online cleaning system provided by the present application is shown.

[0018] The drawings show: 100-switch valve, 200-metal hose, 300-blind plate, 400-driving mechanism, 410-power member, 420-connection member, 430-assistant lifting belt, 500-cleaning mechanism, 510-cleaning tank, 520-medium pipe, 521-regulating valve, 522-float valve, 530-air blowing assembly, 20-bioreactor, 30-gas distributor. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0020] In addition, the reference numbers and / or the reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or the settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0021] The present application provides a gas distributor online cleaning system for online cleaning of a gas distributor 30 in a bioreactor 20. The online cleaning means that the bioreactor 20 does not need to be shut down, the system gas is replaced, the manhole is ventilated, and the like before cleaning.

[0022] The gas distributor 30 is arranged at the bottom of the inner cavity of the bioreactor 20. Generally, the gas distributor 30 is arranged in multiple layers in the vertical direction, and each layer is provided with a plurality of gas distributors 30. In an embodiment, each layer includes two rows of gas distributors 30, and each row includes a plurality of gas distributors 30 arranged side by side. The gas distributor 30 is a bundle type irregular structure, and one end of the gas distributor 30 is provided with a mounting head. The mounting head is provided with a flange hole distributed in the circumferential direction, so as to be flange connected between the mounting head and the bioreactor 20. The wall of the bioreactor 20 is provided with an opening for the gas distributor 30 to enter and exit, and one opening corresponds to one gas distributor 30. For the bioreactor 20 as a whole, the openings are also distributed in multiple layers and multiple numbers.

[0023] The present application provides a gas distributor online cleaning system, hereinafter referred to as the present system. Please refer to Figure 1The system comprises a switch valve 100, a metal hose 200, a blind plate 300, a driving mechanism 400 and a cleaning mechanism 500. The switch valve 100 is an industrial equipment for controlling fluid on-off through an opening and closing member. When the switch valve 100 is in an open state, the gas distributor 30 can pass through the switch valve 100. The switch valve 100 is installed at an opening of the bioreactor 20 for the gas distributor 30 to pass in and out. One end of the metal hose 200 is connected with the switch valve 100, and the other end of the metal hose 200 is connected with the blind plate 300. The metal hose 200 and the blind plate 300 are detachably connected in a quick release manner. The blind plate 300 is detachably connected with the gas distributor 30. The metal hose 200 is provided with a lumen for the gas distributor 30 to pass through. The gas distributor 30 passes through the metal hose 200.

[0024] The cooperation relationship between the gas distributor 30 and the switch valve 100 and the metal hose 200 is further described. When the gas distributor 30 is in a working position in the bioreactor 20, part of the structure of the gas distributor 30 passes through the switch valve 100. The part of the structure is not provided with a gas hole for gas distribution. The blind plate 300 is connected with the metal hose 200 and the gas distributor 30. Even if the switch valve 100 is in an open state, the blind plate 300 and the metal hose 200 can block the opening of the bioreactor 20 for the gas distributor 30 to pass in and out.

[0025] In the system, the driving mechanism 400 is detachably connected with the blind plate 300. Under the condition that the driving mechanism 400 is connected with the blind plate 300, the driving mechanism 400 drives the blind plate 300 to move, and then the blind plate 300 drives the gas distributor 30 to move. Under the driving of the driving mechanism 400, the gas distributor 30 can be moved out of the bioreactor 20 or moved into the bioreactor 20. The cleaning mechanism 500 is spaced apart from the bioreactor 20. The driving mechanism 400 can transfer the gas distributor 30 to the cleaning mechanism 500. The cleaning mechanism 500 cleans the gas distributor 30 moved out of the bioreactor 20. The driving mechanism 400 can return the cleaned gas distributor 30 to the bioreactor 20.

[0026] The system needs to assemble the on-off valve 100, the metal hose 200 and the blind plate 300 in advance. When the protein of the bacteria enters the inside or the outer surface of the gas distributor 30, the gas distribution efficiency of the gas distributor 30 is insufficient, and the normal production of the bioreactor 20 cannot be guaranteed, the system is applied to the online cleaning of the gas distributor 30. Specifically, the driving mechanism 400 is connected with the blind plate 300 connected with the gas distributor 30, and then the driving mechanism 400 pulls out the gas distributor 30 from the bioreactor 20, and after the gas distributor 30 is pulled out from the bioreactor 20, the on-off valve 100 is switched to the closed state, which can avoid the adverse accidents of leakage of a large amount of fermentation mash in the bioreactor 20 in subsequent operation, and after the connection between the blind plate 300 and the metal hose 200 is released, the recovery process of the metal hose 200 is manually pushed, and the metal hose 200 can be manually pushed back to a small length state, and then the driving mechanism 400 moves the gas distributor 30 into the cleaning mechanism 500, and the bioreactor 20 is cleaned by the cleaning mechanism 500, and after cleaning, the gas distributor 30 is returned to the original working position of the bioreactor 20 by the driving mechanism 400.

[0027] The gas distributor online cleaning system of the present application is used to clean the gas distributor 30 of the bioreactor 20, and does not need to stop the operation of the bioreactor 20, replace the gas in the system, ventilate the manhole and other operations before cleaning. The gas distributor 30 is cleaned online, which improves the problem of gas distribution efficiency caused by protein pollution of the gas distributor 30, and solves the technical difficulty of the existing gas distributor 30 which cannot be cleaned online and causes the gas distribution efficiency to decrease.

[0028] Moreover, the application of the system for online cleaning of the gas distributor 30 also improves the technical difficulty of leakage of fermentation liquid during the online plugging process of the tube bundle type irregular gas distributor 30, and guarantees the normal growth and metabolism of the bacteria in the bioreactor 20, and further guarantees the normal production of the bioreactor 20.

[0029] In some embodiments, the maximum extension length of the metal hose 200 is not less than the axial length of the gas distributor 30, which means that the metal hose 200 has two node states in the application of the system. One node state is as shown in FIG. 1, and the other node state is as shown in FIG. 2. Figure 1As shown, the gas distributor 30 is in the installed position in the bioreactor 20, the gas distributor 30 only has a small section passing through the switch valve 100 to the outside of the bioreactor 20, at this time the metal hose 200 is in a small length state. Another node state corresponds to the gas distributor 30 being removed from the opening of the bioreactor 20, and the end of the gas distributor 30 is removed from the opening and moved to the rear of the switch valve 100, in this state the gas distributor 30 is still in the metal hose 200, at this time the length of the metal hose 200 is in a relatively large range, the maximum extension length of the metal hose 200 is at least not less than the length of the metal hose 200 in this state, so as to further limit that the maximum extension length of the metal hose 200 is not less than the axial length of the gas distributor 30, so as to ensure that the deformation degree of the metal hose 200 meets the use requirements of the system.

[0030] As can be seen from the above description, the metal hose 200 has stretchability, and from the perspective of service life, the metal hose 200 also needs to have excellent fatigue resistance.

[0031] When the end of the gas distributor 30 is removed from the opening and moved to the rear of the switch valve 100, the switch valve 100 is adjusted to a closed state, and the opening of the bioreactor 20 is closed by the switch valve 100, and this opening refers to the installation opening of the bioreactor 20 for installing the gas distributor 30. By this means, the adverse accident of a large amount of fermentation mash leaking from the opening in the subsequent cleaning operation is avoided.

[0032] In some embodiments, the driving mechanism 400 includes a power member 410 and a connecting member 420, the power member 410 provides driving force for the position transformation of the gas distributor 30, the power member 410 is distributed away from the blind plate 300, the connecting member 420 is connected between the power member 410 and the blind plate 300, the power member 410 and the blind plate 300 are connected through the connecting member 420, and then under the condition that the blind plate 300 is connected with the gas distributor 30, the power member 410 drives the gas distributor 30 to move, the gas distributor 30 can be driven to enter and exit the bioreactor 20, and the gas distributor 30 can be driven to clean the cleaning mechanism 500.

[0033] In some embodiments, the power member 410 is an electric hoist, the electric hoist is connected with a hook through a rope, the rope and the hook constitute the connecting member 420, the blind plate 300 is provided with a hook, the hook of the electric hoist and the hook are detachably connected, and the hook adopts a type of anti-disengagement hook. Please refer to Figure 1 The site also involves a moving track for moving the electric hoist, and the electric hoist moves along the moving track according to a predetermined path. The driving mechanism 400 further includes an auxiliary lifting belt 430, please refer to Figure 1The auxiliary lifting belt 430 suspends the metal hose 200, and the metal hose 200 is relatively close to the switch valve 100 at the position connected with the auxiliary lifting belt 430. The metal hose 200 is controlled to present in a controllable state in the space by cooperating with the electric hoist through the auxiliary lifting belt 430, so that the distribution state of the gas distributor 30 in the space range is controllable, and the position state of the gas distributor 30 in the movement is controllable.

[0034] In some embodiments, please refer to Figure 1 The cleaning mechanism 500 includes a cleaning tank 510, a plurality of medium pipes 520 and a gas blowing assembly 530. The cleaning tank 510 is spaced apart from the bioreactor 20, and the cleaning tank 510 is provided with a slot for the gas distributor 30 to enter and exit. The gas distributor 30 is transferred into the cleaning tank 510 by the driving mechanism 400, and the cleaned gas distributor 30 is transferred back from the cleaning tank 510. The cleaning tank 510 is connected with the plurality of medium pipes 520 for sending cleaning medium into the cleaning tank 510. The cleaning medium includes but is not limited to alkali solution and acid solution. The cleaning liquid in the cleaning tank 510 is blown by the gas blowing assembly 530 during the cleaning process. The gas blowing assembly 530 includes a gas pipe and a gas source connected with the gas pipe. The gas provided by the gas source can be compressed gas, which improves the gas blowing efficiency and ultimately improves the cleaning efficiency of the gas distributor 30. The gas pipe is provided with a plurality of gas ports in the cleaning tank 510. The gas enters the cleaning liquid in the cleaning tank 510 through the gas ports to stir the cleaning liquid.

[0035] In some embodiments, the medium pipes 520 are provided with an adjusting valve 521 and a float valve 522. The float valve 522 is arranged in the cleaning tank 510. The adjusting valve 521 is used to adjust the feeding flow of the cleaning medium. The float valve 522 is mainly used to cut off, distribute and change the flow direction of the medium on the pipeline. When the liquid level in the inclined tank reaches a preset height, the float valve 522 is closed. Further, the float valve 522 can be interlocked with the adjusting valve 521. When the float valve 522 is closed, the adjusting valve 521 is automatically adjusted to the closed state, thereby improving the automation degree of the cleaning mechanism 500.

[0036] In some embodiments, the plurality of medium pipes 520 includes a first medium pipe 520, a second medium pipe 520 and a third medium pipe 520, which are respectively used to transport alkali solution, acid solution and desalted water. The acid washing and alkali washing are performed when the gas distributor 30 is cleaned, thereby improving the cleaning effect of the gas distributor 30.

[0037] In some embodiments, the alkali solution transported by the first medium pipe 520 is a sodium hydroxide solution with a concentration of 1%-10%, and the acid solution transported by the second medium pipe 520 is a citric acid solution with a concentration of 1%-10%.

[0038] Based on the above gas distributor online cleaning system, the application further provides a gas distributor online cleaning method, which specifically comprises the following steps.

[0039] First, the driving mechanism 400 is connected with the blind plate 300, the driving mechanism 400 is started, and the gas distributor 30 is pulled out from the bioreactor 20.

[0040] The driving mechanism 400 pulls the gas distributor 30 out of the bioreactor 20 until the end of the gas distributor 30 is also pulled out of the opening of the bioreactor 20, and when the end of the gas distributor 30 is pulled to the on-off valve 100, the on-off valve 100 is switched to the closed state at this time, and the opening of the bioreactor 20 is blocked.

[0041] After the on-off valve 100 is switched to the closed state, the connection between the blind plate 300 and the metal hose 200 is released, the metal hose 200 is manually pushed back, the driving mechanism 400 continues to drive the blind plate 300 to drive the gas distributor 30 to move in space until it moves into the cleaning mechanism 500.

[0042] After the gas distributor 30 moves into the cleaning mechanism 500, the cleaning mechanism 500 starts to work and fully cleans the gas distributor 30.

[0043] After the gas distributor 30 is cleaned, the driving mechanism 400 operates again to move the gas distributor 30 into the metal hose 200, and then the blind plate 300 is connected with the end of the metal hose 200. The driving mechanism 400 continues to operate to move the gas distributor 30 towards the bioreactor 20, when the gas distributor 30 moves to the position of the on-off valve 100, the on-off valve 100 is opened, then the gas distributor 30 is inserted through the on-off valve 100, and finally the gas distributor 30 is reloaded into the bioreactor 20.

[0044] As to the cleaning of the gas distributor 30 by the cleaning mechanism 500, the present application provides a cleaning step capable of achieving sufficient cleaning effect. First, the electric hoist pulls the gas distributor 30 from the metal hose 200, and starts the automatic high-pressure water gun to perform high-pressure cleaning on the outer surface of the gas distributor 30; then, the electric hoist moves the gas distributor 30 into the cleaning tank 510, opens the adjusting valve 521 of the first medium pipe 520 to deliver the lye into the cleaning tank 510, opens the control valve of the air blowing assembly 530 to increase the contact efficiency of the lye with the gas distributor 30; after the gas distributor 30 is soaked in the lye for 2-3 hours, the blowdown on-off valve 100 of the cleaning tank 510 is opened to drain the lye in the cleaning tank 510; then, the adjusting valve 521 of the third medium pipe 520 is opened to deliver the desalted water into the cleaning tank 510, and after the design liquid level is reached, the float valve 522 is automatically closed, the control valve of the air blowing assembly 530 is opened to increase the contact efficiency of the desalted water with the gas distributor 30; after the gas distributor 30 is soaked in the desalted water for 1-2 hours, the blowdown on-off valve 100 is opened to drain the desalted water in the cleaning tank 510; then, the adjusting valve 521 of the second medium pipe 520 is opened to deliver the acid into the cleaning tank 510, and after the design liquid level is reached, the float valve 522 is automatically closed, the control valve of the air blowing assembly 530 is opened to increase the contact efficiency of the acid with the gas distributor 30; after the gas distributor 30 is soaked in the acid for 2-3 hours, the blowdown on-off valve 100 is opened to drain the acid in the cleaning tank 510; then, the adjusting valve 521 of the third medium pipe 520 is opened to deliver the desalted water into the cleaning tank 510, and after the design liquid level is reached, the float valve 522 is automatically closed, the control valve of the air blowing assembly 530 is opened to increase the contact efficiency of the desalted water with the gas distributor 30; after the gas distributor 30 is soaked in the desalted water for 1-2 hours, the blowdown on-off valve 100 is opened to drain the desalted water in the cleaning tank 510, and thus the cleaning of the gas distributor 30 is completed.

[0045] In the present application, unless specifically defined and limited otherwise, the "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "on", "above" and "above" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] While the preferred embodiments of the application have been described, additional variations and modifications can be made to these embodiments by those skilled in the art once they have the benefit of the present disclosure without departing from the spirit and scope of the application. Accordingly, it is intended that the appended claims include all such modifications and variations as fall within the scope of the present application.

[0047] It is apparent that those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. It is therefore intended that the present application cover all such changes and modifications that are within its scope.

Claims

1. A gas distributor on-line cleaning system, characterized by, The system comprises: a switch valve installed at an opening of a bioreactor for a gas distributor to pass in and out; a metal hose having one end connected to the switch valve, the metal hose having a lumen for the gas distributor to pass through; a blind plate removably installed at an end of the metal hose away from the switch valve, the blind plate removably connected to the gas distributor; a driving mechanism removably connected to the blind plate, for driving the blind plate to move the gas distributor in and out of the bioreactor; and a cleaning mechanism spaced apart from the bioreactor, for cleaning the gas distributor removed from the bioreactor.

2. The system according to claim 1, wherein a maximum extension length of the metal hose is not less than an axial length of the gas distributor.

3. The system according to claim 1, wherein the switch valve is configured to close the opening when the gas distributor is removed from the bioreactor. The driving mechanism comprises: a power member spaced apart from the blind plate; a connecting member connected between the power member and the blind plate; 4. The gas distributor on-line cleaning system of claim 2, wherein, wherein the power member is configured to drive the gas distributor in and out of the bioreactor and the cleaning mechanism.

5. The system according to claim 4, wherein the blind plate is provided with a hook, the power member is an electric hoist, and a hook of the electric hoist is removably connected to the hook; the driving mechanism further comprises an auxiliary sling, the auxiliary sling suspending a portion of the metal hose close to the switch valve. The cleaning mechanism comprises: a cleaning tank spaced apart from the bioreactor, the cleaning tank being provided with a slot for the gas distributor to pass in and out; a plurality of medium pipes connected to the cleaning tank, each of the medium pipes being configured to transport a cleaning medium; and an air supply assembly comprising an air pipe and an air source connected to the air pipe, the air pipe being provided with a plurality of air outlets located in the cleaning tank.

6. The gas distributor on-line cleaning system of any one of claims 1-5, wherein, 7. The system according to claim 6, wherein the medium pipes are provided with regulating valves and float valves, the float valves being located in the cleaning tank.

8. The system according to claim 6, wherein the plurality of medium pipes comprise a first medium pipe configured to transport a lye, a second medium pipe configured to transport an acid, and a third medium pipe configured to transport a desalted water.

9. The system according to claim 8, wherein the lye transported by the first medium pipe is a sodium hydroxide solution with a concentration of 1% to 10%; and the acid transported by the second medium pipe is a citric acid solution with a concentration of 1% to 10%. The system according to any one of claims 1 to 9, the method comprises: under the condition that the driving mechanism is connected to the blind plate, the driving mechanism pulls the gas distributor out of the bioreactor; an end of the gas distributor is pulled to the switch valve, and the switch valve is switched to a closed state. ​ ​ ​ ​ ​ 10. A method for online cleaning of a gas distributor, characterized in that ​ ​ ​ After the switch valve is switched to the closed state, the blind plate is disconnected from the metal hose, and the driving mechanism drives the blind plate to move the gas distributor to the cleaning mechanism; After the gas distributor moves to the cleaning mechanism, the cleaning mechanism cleans the gas distributor; After the gas distributor is cleaned, the driving mechanism moves the gas distributor to the metal hose, and connects the blind plate to the end of the metal hose; When the gas distributor moves to the position of the switch valve, the switch valve is opened, and the gas distributor is returned to the bioreactor.

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