CN218372446U - Energy-saving micro-bubble gas distribution system of biological oxidation tank - Google Patents
Energy-saving micro-bubble gas distribution system of biological oxidation tank Download PDFInfo
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- CN218372446U CN218372446U CN202221931627.5U CN202221931627U CN218372446U CN 218372446 U CN218372446 U CN 218372446U CN 202221931627 U CN202221931627 U CN 202221931627U CN 218372446 U CN218372446 U CN 218372446U
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Abstract
The utility model belongs to the technical field of a gas distribution device of a microorganism hydrometallurgy process, in particular to an energy-saving micro-bubble gas distribution system of a biological oxidation tank; wherein the centralized gas distribution ring is fixed in the biological oxidation tank body through a rotational flow microbubble aerator and is communicated with the rotational flow microbubble aerator, the centralized gas distribution ring is communicated with a gas conveying pipeline, and the gas conveying pipeline is provided with an angle regulating valve and an air pipe flowmeter; the transmission gas transmission hollow shaft is connected with the driving motor mechanism, an auxiliary angle adjusting valve and an auxiliary gas flowmeter are arranged above the transmission gas transmission hollow shaft, a stirring paddle is fixed at the bottom of the transmission gas transmission hollow shaft, an auxiliary gas distribution main pipe is fixed on the stirring paddle, and an auxiliary gas distribution branch pipe is arranged on the auxiliary gas distribution main pipe; the utility model discloses an air-blower provides the air supply, and the air is concentrated by the gas distribution ring and is carried the distribution, evenly gets into the ore pulp through whirl microbubble aerator, again by the dispersed effect of mechanical stirring impeller stirring, realizes that the solid three-phase of gas-liquid mixes completely.
Description
Technical Field
The utility model belongs to the technical field of microorganism hydrometallurgy technology gas distribution device, concretely relates to energy-conserving microbubble gas distribution system of biological oxidation groove.
Background
The biological oxidation pretreatment gold extraction technology is characterized in that microorganisms in the nature are utilized, ore leaching strains of thiophilic and iron are preferably selected, and after adaptive culture and domestication, sulfide ore matrixes are oxidized and decomposed by utilizing the direct action of metabolism of the microorganisms or the indirect action of metabolites under a proper environment, so that harmful ingredients such as gold-coated minerals pyrite, arsenopyrite and the like are damaged, and gold is fully exposed. The aerobic bacteria in the biological metallurgy process oxidize the mineral oxygen as a final electron acceptor, when concentrate is processed, air is blown into ore pulp from the outside, and the blown air is dispersed into the whole ore pulp as far as possible by reasonable air distribution and mechanical stirring of an air distribution device in a reactor, and the processes of blowing, air conveying and dispersion comprise that oxygen supply energy consumption accounts for 30-40% of total power consumption in the biological oxidation process. Therefore, the reasonable selection and design of the air distribution device have influence on the uniform dispersion of air and the reduction of energy consumption required in the process of supplying, so that the selection of the air distribution device considers the reduction of the size of air bubbles, the increase of the number of the air bubbles, the uniform dispersion of the air bubbles, the improvement of the turbulence degree of fluid and the extension of the contact time of the air bubbles and the fluid.
Traditional biological oxidation tank air feed adopts perforated pipe gas distributor to combine mechanical stirring rake to realize gaseous dispersion, and its venthole is given vent to anger the air lock big, and the bubble form is big after getting into the ore pulp, and gaseous unable more efficient fuses into the ore pulp system, and the oxygen utilization ratio is low, and the energy consumption is great, and is all not ideal to the size formation of bubble and diffusion effect dwell time.
Disclosure of Invention
In order to overcome the problem, the utility model provides an energy-conserving microbubble gas distribution system of biological oxidation groove combines traditional blast air gas distribution and mechanical gas distribution together, provides the air supply through the air-blower, and the air is concentrated by the gas distribution ring and is carried the distribution, evenly gets into the ore pulp through whirl microbubble aerator, again by the diffuse effect of mechanical stirring impeller stirring, realizes the complete mixing of gas-liquid-solid three-phase and mixes.
An energy-saving micro-bubble gas distribution system of a biological oxidation tank comprises a biological oxidation tank body 1, a micro-bubble gas distribution system 2 and a stirring and auxiliary gas distribution system 3;
the microbubble gas distribution system 2 comprises a gas conveying pipeline 21, a concentrated gas distribution ring 22, a rotational flow microbubble aerator 23, an angle adjusting valve 24 and an air pipe flowmeter 25, wherein the concentrated gas distribution ring 22 is fixed on a bottom plate in the biological oxidation tank body 1 through the rotational flow microbubble aerator 23, the gas outlet end of the concentrated gas distribution ring 22 is communicated with the gas inlet end of the rotational flow microbubble aerator 23, the gas inlet end of the concentrated gas distribution ring 22 is communicated with the gas conveying pipeline 21 extending into the biological oxidation tank body 1, and the angle adjusting valve 24 and the air pipe flowmeter 25 are arranged on the gas conveying pipeline 21 above the biological oxidation tank body 1;
the stirring and auxiliary gas distribution system 3 comprises a driving motor mechanism 31, a transmission gas transmission hollow shaft 32, stirring paddles 33, an auxiliary angle adjusting valve 34 and an auxiliary gas flow meter 35, wherein the transmission gas transmission hollow shaft 32 extends into the inner lower part of the biological oxidation tank body 1, the top of the transmission gas transmission hollow shaft is connected with a driving hollow shaft of the driving motor mechanism 31 fixed above the biological oxidation tank body 1 and is driven to rotate by the driving motor mechanism 31, the driving hollow shaft of the driving motor mechanism 31 is provided with the auxiliary angle adjusting valve 34 and the auxiliary gas flow meter 35, the bottom of the transmission gas transmission hollow shaft 32 is fixed with a plurality of stirring paddles 33, the stirring paddles 33 are fixed with an auxiliary gas distribution main pipe 331 communicated with the gas transmission hollow shaft 32, and the auxiliary gas distribution main pipe 331 is provided with a plurality of auxiliary gas distribution branch pipes 332 communicated with the auxiliary gas distribution main pipe 331.
The centralized gas distribution ring 22 comprises a gas inlet flange port 221, a gas distribution ring 222 and a gas outlet flange port 223, wherein the gas distribution ring 222 is provided with a plurality of gas outlet flange ports 223 which are uniformly arranged along the circumferential direction and communicated with the inside of the gas distribution ring, the gas outlet flange port 223 is provided with a rotational flow microbubble aerator 23, the left end of the gas distribution ring 222 is also provided with the gas inlet flange port 221 communicated with the inside of the gas distribution ring, and the gas inlet flange port 221 is connected to the outlet end of the gas conveying pipeline 21.
The rotational flow micro-bubble aerator 23 comprises an air inlet 231, an aerator 232 and a supporting stud 233, wherein the aerator 232 is fixed on the bottom plate in the biological oxidation tank body 1 through the supporting stud 233, the inlet of the aerator is connected with the air inlet 231, and the air inlet 231 is connected with the corresponding air outlet flange port 223.
The gas conveying pipeline 21 is an L-shaped pipeline and comprises a transverse pipe and a vertical pipe, wherein the transverse pipe is located below the inner part of the biological oxidation tank body 1, the right end of the transverse pipe is an outlet end of the gas conveying pipeline 21, the right end of the transverse pipe is connected to the air inlet flange port 221, the vertical pipe penetrates through the top cover of the biological oxidation tank body 1, and an angle adjusting valve 24 and an air pipe flowmeter 25 are arranged on the part of the vertical pipe penetrating through the top cover of the biological oxidation tank body 1.
The driving motor mechanism 31 is fixed above the biological oxidation tank body 1 through a connecting frame, an output shaft in the driving motor mechanism 31 is a driving hollow shaft, an auxiliary angle adjusting valve 34 and an auxiliary gas flowmeter 35 are arranged at the upper part of the driving hollow shaft, the top of the driving gas transmission hollow shaft 32 is connected with the driving hollow shaft of the driving motor mechanism 31, and the bottom of the driving hollow shaft penetrates through the connecting frame and the top cover of the biological oxidation tank body 1 and then extends into the lower part in the biological oxidation tank body 1.
The utility model has the advantages that:
the utility model discloses a top and bottom penetrating ore pulp of whirl aerator main part can't block up the aerator, and the ware is inside to have the broken bubble structure, makes its gas combine the quick dispersion of mechanical stirring rake with the small bubble entering system to make oxygen utilization ratio higher, has especially replaced the perforation aeration, has reduced aeration hole quantity, has increased the venthole diameter, has reduced gas transport's local resistance greatly, reduces air feed fan energy consumption. The use of the auxiliary aeration system improves the service performance of the standby air supply fan and the utilization rate of small amount of gas, and solves the problem of poor low-gas-amount aeration effect of the original unique aerator.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the microbubble gas distribution system of the present invention.
Fig. 3 is a schematic structural view of the swirl micro-bubble aerator of the present invention.
1-biological oxidation tank body; 2-micro bubble gas distribution system; 21-a gas delivery conduit; 22-centralized gas distribution ring; 23-cyclone microbubble aerator; 24-angle adjusting valve; 25-air pipe flow meter; 221-inlet flange port; 222-gas distribution ring; 223-air outlet flange port; 231 — an air inlet; 232-aerator; 233-support studs; 3-stirring and auxiliary gas distribution system; 31. -a drive motor mechanism; 32-a drive gas transmission hollow shaft; 33-a stirring paddle; 34-auxiliary angle adjusting valve; 35-an auxiliary gas flow meter; 331-auxiliary gas distribution main pipe; 332-auxiliary aerator manifold.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example 1
As shown in fig. 1, an energy-saving micro-bubble gas distribution system of a biological oxidation tank comprises a biological oxidation tank body 1, a micro-bubble gas distribution system 2 and a stirring and auxiliary gas distribution system 3;
as shown in fig. 2, the micro-bubble gas distribution system 2 comprises a gas conveying pipeline 21, a centralized gas distribution ring 22, a rotational flow micro-bubble aerator 23, an angle adjusting valve 24 and an air pipe flowmeter 25, wherein the centralized gas distribution ring 22 is fixed on the bottom plate inside the biological oxidation tank 1 through the rotational flow micro-bubble aerator 23, the gas outlet end of the centralized gas distribution ring 22 is communicated with the gas inlet end of the rotational flow micro-bubble aerator 23, the gas inlet end of the centralized gas distribution ring 22 is communicated with the gas conveying pipeline 21 extending into the biological oxidation tank 1, and the angle adjusting valve 24 and the air pipe flowmeter 25 are arranged on the gas conveying pipeline 21 above the biological oxidation tank 1;
the stirring and auxiliary gas distribution system 3 comprises a driving motor mechanism 31, a transmission gas transmission hollow shaft 32, stirring paddles 33, an auxiliary angle adjusting valve 34 and an auxiliary gas flowmeter 35, wherein the transmission gas transmission hollow shaft 32 extends into the lower part of the interior of the biological oxidation tank body 1, the top of the transmission gas transmission hollow shaft is connected with a driving hollow shaft of the driving motor mechanism 31 fixed above the biological oxidation tank body 1 and is driven to rotate by the driving motor mechanism 31, the driving hollow shaft of the driving motor mechanism 31 is provided with the auxiliary angle adjusting valve 34 and the auxiliary gas flowmeter 35, the bottom of the transmission gas transmission hollow shaft 32 is fixed with a plurality of stirring paddles 33, the stirring paddles 33 are fixed with an auxiliary gas distribution main pipe 331 communicated with the gas transmission hollow shaft 32, the auxiliary gas distribution main pipe 331 is provided with a plurality of auxiliary gas distribution branch pipes 332 communicated with the auxiliary gas distribution main pipe, and the stirring paddles 33 are arranged on the upper side of the concentrated gas distribution ring 22 and have a certain distance with the auxiliary gas distribution main pipe 331.
The centralized gas distribution ring 22 comprises a gas inlet flange port 221, a gas distribution ring 222 and a gas outlet flange port 223, wherein a plurality of gas outlet flange ports 223 which are uniformly arranged and communicated with the inside of the gas distribution ring 222 are arranged at the tangent of the bottom of the pipe diameter of the gas distribution ring 222 along the circumferential direction, a rotational flow microbubble aerator 23 is arranged on the gas outlet flange port 223, the gas inlet flange port 221 communicated with the inside of the gas distribution ring 222 is also arranged at the left end of the gas distribution ring 222, and the gas inlet flange port 221 is connected to the outlet end of the gas conveying pipeline 21.
As shown in fig. 3, the swirl micro-bubble aerator 23 comprises an air inlet 231, an aerator 232 and a support stud 233, wherein the aerator 232 is fixed on the bottom plate inside the biological oxidation tank 1 through the support stud 233, the inlet of the aerator is connected with the air inlet 231, and the air inlet 231 is connected with the corresponding air outlet flange port 223.
The gas conveying pipeline 21 is an L-shaped pipeline and comprises a transverse pipe and a vertical pipe, wherein the transverse pipe is located below the inner part of the biological oxidation tank body 1, the right end of the transverse pipe is an outlet end of the gas conveying pipeline 21, the right end of the transverse pipe is connected to the air inlet flange port 221, the vertical pipe penetrates through the top cover of the biological oxidation tank body 1, and an angle adjusting valve 24 and an air pipe flowmeter 25 are arranged on the part of the vertical pipe penetrating through the top cover of the biological oxidation tank body 1.
The driving motor mechanism 31 is fixed above the biological oxidation tank body 1 through a connecting frame, an output shaft in the driving motor mechanism 31 is a driving hollow shaft, the driving hollow shaft penetrates through the upper part and the lower part of the speed reducer, an auxiliary angle adjusting valve 34 and an auxiliary gas flowmeter 35 which are movably and hermetically connected are arranged at the upper part of the speed reducer to control the gas inflow, the top of the driving hollow shaft 32 is connected with a driving hollow shaft of the driving motor mechanism 31, the bottom of the driving hollow shaft penetrates through the connecting frame and a top cover of the biological oxidation tank body 1 and then extends into the lower part in the biological oxidation tank body 1, and the motor speed reducer drives the hollow shaft to rotate to drive the driving hollow shaft to rotate.
Example 2
Referring to fig. 1, the utility model is composed of a biological oxidation tank body 1, a micro-bubble gas distribution system 2, and a stirring and auxiliary gas distribution system 3; the microbubble air distribution system 2 comprises an air conveying pipeline 21, a centralized air distribution ring 22, swirl microbubble aerators 23, an angle adjusting valve 24 and an air pipe flowmeter 25, wherein the centralized air distribution ring 22 consists of an air inlet flange port 221, an air distribution ring 222 and an air outlet flange port 223, the number of the swirl microbubble aerators 23 is designed according to aeration quantity, and the swirl microbubble aerators structurally consist of an air inlet 231, an aerator 232 and supporting vertical ribs 233; the stirring and auxiliary gas distribution system 3 comprises a driving motor mechanism 31, a transmission gas transmission hollow shaft 32, a stirring paddle 33, an auxiliary angle adjusting valve 34, an auxiliary gas flowmeter 35, an auxiliary gas distribution main pipe 331 and an auxiliary aerator branch pipe 332.
The air inlet end of the gas conveying pipeline 21 is provided with an angle adjusting valve 24 and an air pipe flowmeter 25, the air outlet end of the gas conveying pipeline 21 is connected with an air inlet flange port 221 of a centralized air distribution ring 22, a plurality of air outlet flange ports 223 of the centralized air distribution ring 22 are respectively connected with air inlets 231 of corresponding rotational flow microbubble aerators 23, and supporting studs 233 of the rotational flow aerators 23 are fixed at the bottom of the biological oxidation tank body 1. The driving motor mechanism 31 of the stirring and auxiliary gas distribution system 3 is fixed on the upper part of the stirring tank, the transmission gas transmission hollow shaft 32 is fixed on the driving motor mechanism 31 in a penetrating way, the top part of the transmission gas transmission hollow shaft is connected with the auxiliary angle adjusting valve 34 and the auxiliary gas flowmeter 35, the stirring paddle 33 is installed on the lower part of the transmission gas transmission hollow shaft, the auxiliary gas distribution main pipe 331 arranged on the stirring paddle 33 is communicated with the gas transmission hollow shaft 32, and the auxiliary gas distribution branch pipe 332 arranged on the stirring paddle 33 is communicated with the auxiliary gas distribution main pipe 331. The stirring paddle 33 is arranged on the upper side of the centralized gas distribution ring 22 with a certain distance.
The diameter of the centralized gas distribution ring 22 is designed according to the size of the biological oxidation tank, the pipe diameter is selected according to the gas amount, the gas inlet flange port 221 of the centralized gas distribution ring is arranged in the middle of the pipe diameter of the gas distribution ring 222, and the gas outlet flange port 223 is designed according to the number of the rotational flow micro-bubble aerators and is uniformly arranged at the tangent line at the bottom of the pipe diameter of the gas distribution ring 222.
The utility model discloses the working process: during normal operation, a main fan of the system provides compressed air, the air is conveyed to a centralized air distribution ring 22 for air distribution through an air conveying pipeline 21 of a micro-bubble air distribution system 2, the air is aerated through a plurality of rotational flow micro-bubble aerators 23 and enters the ore pulp in the biological oxidation tank body 1 through micro bubbles, at the moment, a driving motor mechanism 31 of a stirring and auxiliary air distribution system 3 drives a transmission air conveying hollow shaft 32 to drive a stirring paddle 33 to rotate, so that the micro bubbles coming out of the rotational flow micro-bubble aerators 23 are quickly and uniformly dispersed in the ore pulp system, an air pipe flowmeter 25 of the micro-bubble air distribution system 22 monitors the air inlet flow of the system, and the air flow is adjusted on line by controlling the opening and closing of an angle adjusting valve 24 according to process index feedback.
When power is off or the main blower is overhauled, the microbubble gas distribution system 22 cannot provide a large amount of gas in time, an aeration gas source of the standby power supply and the stirring and auxiliary gas distribution system 3 is started, the auxiliary angle adjusting valve 34 is opened, the gas is metered by the auxiliary gas flowmeter 35 to distribute the gas amount of each tank according to requirements, the gas is conveyed to the auxiliary gas distribution main pipe 331 of the stirring paddle 33 through the transmission gas hollow shaft 32, is exposed from the auxiliary aerator branch pipe 332, temporary aeration is realized under the stirring of the stirring system, and the auxiliary system can be started to aerate when the gas amount of the main gas supply system cannot meet the system requirements.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the protection scope of the present invention is not limited to the details of the above embodiments, and within the technical concept of the present invention, any person skilled in the art is within the technical scope of the present invention, and according to the technical solution of the present invention and the inventive concept thereof, equivalent replacement or change is made, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
Claims (5)
1. An energy-saving micro-bubble gas distribution system of a biological oxidation tank is characterized by comprising a biological oxidation tank body (1), a micro-bubble gas distribution system (2) and a stirring and auxiliary gas distribution system (3);
the microbubble gas distribution system (2) comprises a gas conveying pipeline (21), a concentrated gas distribution ring (22), a rotational flow microbubble aerator (23), an angle adjusting valve (24) and an air pipe flowmeter (25), wherein the concentrated gas distribution ring (22) is fixed on a bottom plate in the biological oxidation tank body (1) through the rotational flow microbubble aerator (23), the gas outlet end of the concentrated gas distribution ring (22) is communicated with the gas inlet end of the rotational flow microbubble aerator (23), the gas inlet end of the concentrated gas distribution ring (22) is communicated with the gas conveying pipeline (21) extending into the biological oxidation tank body (1), and the angle adjusting valve (24) and the air pipe flowmeter (25) are arranged on the gas conveying pipeline (21) above the biological oxidation tank body (1);
stirring and supplementary gas distribution system (3) are including driving motor mechanism (31), transmission gas transmission hollow shaft (32), stirring rake (33), supplementary angle modulation valve (34), supplementary gas flowmeter (35), wherein transmission gas transmission hollow shaft (32) stretch into biological oxidation cell body (1) inside below, and its top is connected with the drive hollow shaft of fixing driving motor mechanism (31) above biological oxidation cell body (1), it is rotatory to be driven by driving motor mechanism (31), and be equipped with supplementary angle modulation valve (34) and supplementary gas flowmeter (35) on the drive hollow shaft of driving motor mechanism (31), transmission gas transmission hollow shaft (32) bottom is fixed with a plurality of stirring rakes (33), be fixed with supplementary gas distribution person in charge (331) with gas transmission hollow shaft (32) intercommunication on stirring rake (33), be equipped with a plurality of supplementary gas distribution branch pipes (332) rather than the intercommunication on supplementary gas distribution person in charge (331).
2. The energy-saving micro-bubble gas distribution system of a biological oxidation tank according to claim 1, wherein the centralized gas distribution ring (22) comprises a gas inlet flange port (221), a gas distribution ring (222) and a gas outlet flange port (223), wherein the gas distribution ring (222) is provided with a plurality of gas outlet flange ports (223) which are uniformly arranged along the circumferential direction and are communicated with the inside of the gas outlet flange port, the gas outlet flange port (223) is provided with a rotational flow micro-bubble aerator (23), the left end of the gas distribution ring (222) is also provided with the gas inlet flange port (221) which is communicated with the inside of the gas distribution ring, and the gas inlet flange port (221) is connected to the outlet end of the gas conveying pipeline (21).
3. The energy-saving micro-bubble gas distribution system of the biological oxidation tank as claimed in claim 2, wherein the cyclone micro-bubble aerator (23) comprises a gas inlet (231), an aerator (232) and a support stud (233), wherein the aerator (232) is fixed on the bottom plate inside the biological oxidation tank body (1) through the support stud (233), the inlet of the aerator is connected with the gas inlet (231), and the gas inlet (231) is connected with the corresponding gas outlet flange (223).
4. The energy-saving micro-bubble gas distribution system of the biological oxidation tank as claimed in claim 3, wherein the gas delivery pipeline (21) is an L-shaped pipeline, and comprises a transverse pipe and a vertical pipe, wherein the transverse pipe is located below the inside of the biological oxidation tank (1), the right end of the transverse pipe is the outlet end of the gas delivery pipeline (21), the right end of the transverse pipe is connected to the air inlet flange port (221), the vertical pipe penetrates through the top cover of the biological oxidation tank (1), and the part of the vertical pipe penetrating through the top cover of the biological oxidation tank (1) is provided with an angle adjusting valve (24) and a wind pipe flowmeter (25).
5. The energy-saving micro-bubble gas distribution system of the biological oxidation tank as claimed in claim 4, wherein the driving motor mechanism (31) is fixed above the biological oxidation tank body (1) through a connecting frame, an output shaft inside the driving motor mechanism (31) is a driving hollow shaft, an auxiliary angle adjusting valve (34) and an auxiliary gas flow meter (35) are arranged at the upper part of the driving hollow shaft, the top of the driving hollow shaft (32) is connected with the driving hollow shaft of the driving motor mechanism (31), and the bottom of the driving hollow shaft penetrates through the connecting frame and a top cover of the biological oxidation tank body (1) and then extends into the lower part of the inside of the biological oxidation tank body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221931627.5U CN218372446U (en) | 2022-07-26 | 2022-07-26 | Energy-saving micro-bubble gas distribution system of biological oxidation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221931627.5U CN218372446U (en) | 2022-07-26 | 2022-07-26 | Energy-saving micro-bubble gas distribution system of biological oxidation tank |
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| CN218372446U true CN218372446U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221931627.5U Active CN218372446U (en) | 2022-07-26 | 2022-07-26 | Energy-saving micro-bubble gas distribution system of biological oxidation tank |
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| CN (1) | CN218372446U (en) |
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2022
- 2022-07-26 CN CN202221931627.5U patent/CN218372446U/en active Active
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