CN219620969U - Short-cut nitrification sewage treatment device - Google Patents
Short-cut nitrification sewage treatment device Download PDFInfo
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- CN219620969U CN219620969U CN202320235492.7U CN202320235492U CN219620969U CN 219620969 U CN219620969 U CN 219620969U CN 202320235492 U CN202320235492 U CN 202320235492U CN 219620969 U CN219620969 U CN 219620969U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The utility model discloses a short-cut nitrification sewage treatment device, which comprises a stirring mechanism and a sewage treatment mechanism connected with the stirring mechanism, wherein the sewage treatment mechanism comprises a sewage treatment box and a spiral stirring assembly arranged on the sewage treatment box, the spiral stirring assembly comprises a transmission box arranged at the top of the sewage treatment box, a driving motor arranged on the transmission box, and two spiral stirrers rotatably and symmetrically arranged in the sewage treatment box, an output shaft of the driving motor penetrates through the top wall of the transmission box to extend into the transmission box and is in transmission connection with a gear in the transmission box, two transmission belts are sleeved on the gear, one ends of the two spiral stirrers penetrate through the top wall of the sewage treatment box to extend out of the sewage treatment box, and one ends of the two transmission belts are respectively sleeved at one ends of the two spiral stirrers outside the sewage treatment box.
Description
Technical Field
The utility model relates to the technical field of sewage treatment, in particular to a short-cut nitrification sewage treatment device.
Background
In the production process of oximation synthesis, excessive ammonia water is required to be added, so that a large amount of nitrogen-containing wastewater is generated, denitrification treatment is required when the nitrogen-containing wastewater is treated, and at present, in the existing denitrification treatment mode, NH is treated by using nitrosation bacteria through short-cut nitrification 3 Conversion to nitrite NO 2- And then further generates N 2 Short-cut nitrification omits the step of removing NO from the wastewater 2- Oxidation to NO 3- And the denitrification is carried out by NO 3- Reduction to NO 2- The method can save energy consumption and carbon sources, and has the advantages of short reaction time, low sludge amount and the like. However, the shortcut nitrification and denitrification process needs to be performed under a specific temperature and pH value environment, so that a certain amount of pH regulator powder needs to be continuously added into the sewage in the practical application process to ensure that the pH value of the sewage can be maintained in a certain range, at present, most of the existing pH powder adding modes adopt a conveyor belt to be added into the sewage in batches at one time, the pH value of the sewage is unstable by adopting the adding modes, so that shortcut nitrification cannot be performed, and meanwhile, excessive pH regulator is added to waste the pH regulator powder.
Disclosure of Invention
In view of the above, the present utility model provides a short-cut nitrification sewage treatment apparatus to solve the above-mentioned problems.
The technical scheme adopted for solving the technical problems is as follows:
the utility model provides a short distance nitrify sewage treatment plant, includes rabbling mechanism, and with sewage treatment mechanism that rabbling mechanism is connected, sewage treatment mechanism includes the sewage treatment case, and sets up spiral stirring subassembly on the sewage treatment case, spiral stirring subassembly is including installing the transmission box at sewage treatment case top sets up driving motor on the transmission box, and rotationally symmetry set up two spiral stirrers in the sewage treatment case, driving motor's output shaft passes the roof of transmission box extends to in the transmission box with gear drive in the transmission box is connected, the cover is equipped with two drive belts on the gear, two spiral stirrers's one end is all passed the roof of sewage treatment case extends to the outside of sewage treatment case, two spiral stirrers's one end is overlapped respectively and is established two spiral stirrers are in the one end of sewage treatment case outside.
Further, water inlets and water outlets are respectively formed in the top and the bottom of the side wall of the sewage treatment box, two baffles are symmetrically arranged on two sides of the cavity wall of the inner cavity of the sewage treatment box along the length direction of the sewage treatment box, and the lower surfaces of the baffles are all detachably provided with vertically arranged filtering screens.
Further, the baffle, the filtering separation net and the inner cavity side wall and the bottom wall of the sewage treatment box are surrounded to form a containing cavity, and a plurality of microorganism suspension balls are filled in the containing cavity.
Further, the transmission box is provided with a mounting frame, and the driving motor is fixedly mounted on the mounting frame.
Further, the sewage treatment mechanism further comprises an aeration assembly and a gas transmission assembly, wherein the aeration assembly is arranged in the sewage treatment box, and the gas transmission assembly is arranged on one side of the sewage treatment box.
Further, the aeration component comprises a fixing frame arranged in the sewage treatment box and a plurality of aeration films arranged on the fixing frame, and a plurality of aeration holes are formed in the aeration films.
Further, the gas transmission assembly comprises a blower arranged on one side of the sewage treatment box and a gas transmission pipe connected with an air outlet of the blower, and one end of the gas transmission pipe penetrates through the top wall of the sewage treatment box to extend into the sewage treatment box and is connected with the aeration membrane.
Further, the stirring mechanism comprises a holding tank, a stirring assembly arranged on the holding tank, a conveying pipe arranged on the holding tank and a conveying pump arranged on the conveying pipe, wherein a feeding port is formed in the top wall of the holding tank, a water pipe is further connected to the top wall of the holding tank, one end of the water pipe is connected with a water source, and the conveying pipe is connected with the top wall of the sewage treatment tank.
Further, the stirring assembly comprises a stirring motor arranged at the top of the accommodating tank, a stirring shaft rotatably arranged inside the accommodating tank, and stirring blades fixedly arranged on the stirring shaft, wherein an output shaft of the stirring motor penetrates through the top wall of the accommodating tank, extends to the inside of the accommodating tank and is in transmission connection with the stirring shaft.
Further, the short-cut nitrification sewage treatment device further comprises a conveying mechanism, the conveying mechanism comprises a bottom plate, a conveying motor and a spiral conveying pipe, the conveying motor is arranged on the bottom plate, the conveying motor is arranged at the bottom end of the spiral conveying pipe, a feeding hopper is arranged on the spiral conveying pipe, the feeding hopper is arranged at one end, close to the conveying motor, of the spiral conveying pipe, and one end, close to the conveying motor, of the spiral conveying pipe is arranged relatively, extends to the accommodating tank and is communicated with the feeding port.
The beneficial effects of the utility model are as follows:
the utility model provides a short-range nitrification sewage treatment device, which comprises a stirring mechanism for stirring and dissolving pH regulator powder, and a sewage treatment mechanism connected with the stirring mechanism, wherein the top of the sewage treatment tank of the sewage treatment mechanism is provided with a spiral stirring assembly, the spiral stirring assembly comprises a transmission box arranged at the top of the sewage treatment tank, a driving motor arranged on the transmission box, and two spiral stirrers rotatably and symmetrically arranged in the sewage treatment tank, an output shaft of the driving motor penetrates through the top wall of the transmission box and extends into the transmission box to be in transmission connection with gears in the transmission box, two transmission belts are sleeved on the gears, one ends of the two spiral stirrers penetrate through the top wall of the sewage treatment tank and extend to the outside of the sewage treatment tank, one ends of the two transmission belts are respectively sleeved at one ends of the outside of the sewage treatment tank, and the driving motor can drive the two spiral stirrers to rotate simultaneously through transmission cooperation of gears in the transmission box, so that the sewage in the sewage treatment tank is stirred, the pH regulator and water are mixed and then conveyed into the sewage treatment tank, the pH regulator is directly mixed with the sewage after the water, the pH regulator is stirred into the sewage treatment tank, the pH regulator is directly added into the sewage treatment tank, the pH regulator can be directly controlled by the pH regulator powder, and the pH regulator can be prevented from being directly added into the sewage solution, and the pH regulator is directly beyond the pH regulator, and the pH regulator is prevented from being directly wasted by the pH regulator.
Drawings
The utility model is further described below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of a short-cut nitrification sewage treatment apparatus according to the present utility model;
FIG. 2 is a cross-sectional view of a holding tank with a stirring assembly and a portion of a transfer pipe in a stirring mechanism in the short-cut nitrification sewage treatment apparatus of the present utility model shown in FIG. 1;
FIG. 3 is a sectional view of a sewage treatment tank in a sewage treatment mechanism in the short-cut nitrification sewage treatment apparatus of the present utility model shown in FIG. 1.
In the figure: 100. the short distance nitrifying sewage treatment device comprises 1, a conveying mechanism, 11, a bottom plate, 111, a mounting seat, 112, a supporting frame, 12, a conveying motor, 13, a spiral conveying pipe, 131, a feeding hopper, 2, a stirring mechanism, 21, a containing tank, 22, a stirring assembly, 221, a stirring motor, 222, a stirring shaft, 223, stirring blades, 23, a conveying pipe, 24, a conveying pump, 3, a sewage treatment mechanism, 31, a sewage treatment box, 311, a liquid inlet, 312, a liquid outlet, 313, a baffle plate, 314, a filtering screen, 315, a microorganism suspending ball, 32, a spiral stirring assembly, 321, a transmission box, 322, a driving motor, 323, a mounting frame, 324, a transmission belt, 325, a spiral stirrer, 33, an aeration assembly, 331, a fixing frame, 332, an aeration film, 34, a gas transmission assembly, 341, a blower, 342 and a gas transmission pipe.
Detailed Description
The present utility model will now be described in detail with reference to the accompanying drawings. The figure is a simplified schematic diagram illustrating the basic structure of the utility model only by way of illustration, and therefore it shows only the constitution related to the utility model.
As shown in fig. 1, the present utility model provides a short-cut nitrification sewage treatment apparatus 100 for treating nitrogen-containing wastewater generated during oxime synthesis, the short-cut nitrification sewage treatment apparatus 100 of the present utility model comprises a conveying mechanism 1 for conveying pH adjuster powder, a stirring mechanism 2 arranged at one side of the conveying mechanism 1 for stirring and dissolving the pH adjuster powder, and a sewage treatment mechanism 3 connected with the stirring mechanism 2 through a pipeline for treating nitrogen-containing wastewater, wherein the pH adjuster powder is conveyed into the stirring mechanism 2 through the conveying mechanism 1 to be mixed with water and stirred and dissolved, and the dissolved pH adjuster solution is conveyed into the sewage treatment mechanism 3 to be mixed with the nitrogen-containing wastewater to perform short-cut nitrification denitrification process treatment on the nitrogen-containing wastewater.
As shown in fig. 1, the conveying mechanism 1 comprises a bottom plate 11, a conveying motor 12 and a screw conveying pipe 13, wherein the conveying motor 12 and the screw conveying pipe 13 are arranged on the bottom plate 11, a mounting seat 111 for mounting the conveying motor 12 and a supporting frame 112 for supporting the screw conveying pipe 13 are arranged on the bottom plate 11, the conveying motor 12 is arranged at the bottom end of the screw conveying pipe 13, a feed hopper 131 for adding the powder of the pH regulator is arranged on the screw conveying pipe 13, the feed hopper 131 is arranged at one end of the screw conveying pipe 13 close to the conveying motor 12, a screw (not shown) is rotatably arranged in the screw conveying pipe 13, an output shaft of the conveying motor 12 penetrates through an end wall of the screw conveying pipe 13 to extend into the screw conveying pipe 13 to be in transmission connection with the screw conveying pipe, and one end of the screw conveying pipe 13, opposite to which the feed hopper 131 is arranged, extends to the stirring mechanism 2 and is connected with the stirring mechanism 2.
As shown in fig. 1 and 2, the stirring mechanism 2 comprises a holding tank 21, a stirring assembly 22 mounted on the holding tank 21 and used for stirring a pH regulator inside the holding tank 21, a conveying pipe 23 arranged on the holding tank 21 and used for connecting the holding tank 21 and the sewage treatment mechanism 3, and a conveying pump 24 mounted on the conveying pipe 23 and used for conveying the pH regulator solution, a feeding hole (not shown) matched with the conveying mechanism 1 is formed in the top wall of the holding tank 21, a spiral conveying pipe 13 of the conveying mechanism 1 is communicated with the feeding hole, a water pipe (not shown) is further connected to the top wall of the holding tank 21, and one end of the water pipe is connected with a water source; the stirring assembly 22 comprises a stirring motor 221 arranged at the top of the accommodating tank 21, a stirring shaft 222 rotatably arranged in the accommodating tank 21, and stirring blades 223 fixedly arranged on the stirring shaft 222 and used for stirring the solution, wherein an output shaft of the stirring motor 221 penetrates through the top wall of the accommodating tank 21 to extend into the accommodating tank 21 and is in transmission connection with the stirring shaft 222, and when stirring, the stirring motor 221 drives the stirring shaft 222 to drive the stirring blades 223 to rotate, so that the solution in the accommodating tank 21 is stirred.
As shown in fig. 1, 2 and 3, the sewage treatment mechanism 3 includes a sewage treatment tank 31 for accommodating and treating sewage, a spiral stirring assembly 32 mounted on the sewage treatment tank 31 for stirring a pH adjuster solution and sewage, an aeration assembly 33 mounted in the sewage treatment tank 31 for aerating the sewage, and a gas transmission assembly 34 provided at one side of the sewage treatment tank 31 for transmitting gas to the aeration assembly; the conveyer pipe 23 in the rabbling mechanism 2 is connected with the roof of sewage treatment case 31, and the water inlet 311 and the delivery port 312 that are used for discharging sewage are offered respectively to the lateral wall top and the lateral wall bottom of sewage treatment case 31, and the inner chamber wall both sides of sewage treatment case 31 are provided with two baffles 313 along the length direction symmetry of sewage treatment case 31, and the lower surface of every baffle 313 all detachably installs the filtration that vertically sets up separates net 314, and baffle 313 and filtration separate net 314 and the inner chamber lateral wall and the diapire of sewage treatment case 31 surround and are formed with and hold the chamber (not shown), hold the intracavity and be filled with a plurality of microorganism suspension balls 315 that are used for carrying out short range nitrification denitrification to sewage.
As shown in fig. 3, the spiral stirring assembly 32 includes a driving box 321 installed at the top of the sewage treatment tank 31, a driving motor 322 disposed on the driving box 321, and two spiral stirrers 325 rotationally symmetrically disposed in the sewage treatment tank 31, a mounting bracket 323 is disposed on the driving box 321, the driving motor 322 is fixedly installed on the mounting bracket 323, an output shaft of the driving motor 322 passes through a top wall of the driving box 321 and extends into the driving box 321 to be in transmission connection with a gear (not shown) in the driving box 321, two driving belts 324 matched with the spiral stirrers 325 are sleeved on the gear in the driving box 321, one ends of the two spiral stirrers 325 pass through the top wall of the sewage treatment tank 31 and extend to the outside of the sewage treatment tank 31, one ends of the two driving belts 324 are respectively sleeved at one ends of the two spiral stirrers 325 outside the sewage treatment tank 31, and the driving motor 322 can drive the two spiral stirrers 325 to rotate simultaneously through the gear in the driving box 321 and the transmission cooperation of the two driving belts 324, thereby stirring the sewage treatment tank 31.
As shown in fig. 3, the aeration assembly 33 includes a fixing frame 331 disposed in the sewage treatment tank 31, and a plurality of aeration membranes 332 mounted on the fixing frame 331, a plurality of aeration holes (not shown) are formed in the aeration membranes 332, the air delivery assembly includes an air blower 341 disposed at one side of the sewage treatment tank 31, and an air delivery pipe 342 connected to an air outlet of the air blower 341, one end of the air delivery pipe 342 extends into the sewage treatment tank 31 through a top wall of the sewage treatment tank 31 and is connected to the aeration membranes 332, and air flow formed by air blown by the air blower 341 is delivered into the aeration membranes 332 through the air delivery pipe 342, so that the aeration holes in the aeration membranes 332 are opened to form micro bubbles, thereby enabling the sewage to be fully contacted with the air, and simultaneously, the pH regulator solution and the sewage can be fully mixed when the micro bubbles rise.
When sewage is treated, the conveying motor 12 is started, pH regulator powder is added into the feed hopper 131, the pH regulator powder passes through the feed hopper 131 and enters the spiral conveying pipe 13, the conveying motor 12 drives the screw in the spiral conveying pipe 13 to rotate, the pH regulator powder is upwards conveyed into the accommodating tank 21 of the stirring mechanism 2 along with the rotation of the screw, a water source is opened to convey water into the accommodating tank 21, the stirring motor 221 is started, the stirring motor 221 drives the stirring shaft 222 to drive the stirring blade 223 to rotate, so that the solution in the accommodating tank 21 is stirred to obtain the pH regulator solution, the conveying pump 24 is started, the uniformly stirred pH regulator solution is conveyed into the sewage treatment tank 31 through the conveying pipe 23, nitrogen-containing wastewater to be treated is simultaneously conveyed into the sewage treatment tank 31 to be mixed with the pH regulator solution, the driving motor 322 and the blower 341 are started, the driving motor 322 drives the two spiral stirrers 325 to rotate to stir the sewage in the sewage treatment tank 31, and simultaneously the air flow formed by the blower 341 is conveyed into the aeration membrane 332, so that the sewage on the aeration membrane 332 is opened, and the sewage is fully mixed with the nitrogen-containing sewage to be fully aerated with the nitrogen-containing sewage when the micro-air bubbles are formed, and the pH regulator solution is fully mixed with the sewage when the micro-aeration air is fully aerated.
The short-cut nitrification sewage treatment device 100 provided by the utility model comprises a stirring mechanism 2 for stirring and dissolving pH regulator powder, and a sewage treatment mechanism 3 connected with the stirring mechanism 2, wherein a spiral stirring assembly 32 is arranged at the top of a sewage treatment box 31 of the sewage treatment mechanism 3, the spiral stirring assembly 32 comprises a transmission box 321 arranged at the top of the sewage treatment box 31, a driving motor 322 arranged on the transmission box 321, and two spiral stirrers 325 rotationally symmetrically arranged in the sewage treatment box 31, an output shaft of the driving motor 322 penetrates through the top wall of the transmission box 321 and extends into the transmission box 321 to be in transmission connection with the gear in the transmission box 321, two transmission belts 324 are sleeved on the gear, one ends of the two spiral stirrers 325 penetrate through the top wall of the sewage treatment box 31 and extend to the outside of the sewage treatment box 31, one ends of the two transmission belts 324 are respectively sleeved at one ends of the two spiral stirrers at the outside of the sewage treatment box 31, the driving motor 322 can drive the two spiral stirrers 325 through the gear in the transmission box 321 and the transmission of the two transmission belts 324, and simultaneously drive the two spiral stirrers 325 to rotate along with the sewage in the transmission of the transmission box 321, so that the pH regulator powder is directly added into the sewage treatment box 31, the pH regulator powder can be prevented from being mixed with the pH regulator powder, and the pH regulator powder can be directly added into the sewage treatment box 31, the pH regulator solution can be prevented from being directly mixed, the pH regulator solution can be directly and the pH regulator solution can be prevented from being mixed with the pH regulator solution after the pH regulator solution is mixed with the pH regulator solution is adjusted, and the pH regulator solution can be directly and the pH regulator solution is directly and the pH regulator solution can be directly prevented from being mixed with the pH regulator solution 2.
While the foregoing is directed to the preferred embodiment of the present utility model, other and further embodiments of the utility model may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.
Claims (10)
1. The utility model provides a short-cut nitrify sewage treatment plant, its characterized in that, including rabbling mechanism, and with sewage treatment mechanism that rabbling mechanism is connected, sewage treatment mechanism includes the sewage treatment case, and sets up spiral stirring subassembly on the sewage treatment case, spiral stirring subassembly is including installing the transmission box at sewage treatment case top sets up driving motor on the transmission box, and rotationally symmetry sets up two spiral stirrers in the sewage treatment case, driving motor's output shaft passes the roof of transmission box extends to in the transmission box with gear drive in the transmission box is connected, the cover is equipped with two drive belts on the gear, the one end of two spiral stirrers all passes the roof of sewage treatment case extends to the outside of sewage treatment case, one end of two drive belts is overlapped respectively and is established two spiral stirrers is in the one end of sewage treatment case outside.
2. The short-cut nitrification sewage treatment device as claimed in claim 1, wherein the top and the bottom of the side wall of the sewage treatment tank are respectively provided with a water inlet and a water outlet, two sides of the cavity wall of the inner cavity of the sewage treatment tank are symmetrically provided with two baffles along the length direction of the sewage treatment tank, and the lower surfaces of the baffles are respectively provided with a filtering separation net in a detachable manner.
3. The short distance nitrifying sewage treatment device of claim 2, wherein a containing cavity is formed by surrounding the baffle, the filtering separation net and the inner cavity side wall and the bottom wall of the sewage treatment box, and a plurality of microorganism suspension balls are filled in the containing cavity.
4. The short-cut nitrification sewage treatment apparatus as claimed in claim 1, wherein the transmission case is provided with a mounting frame, and the driving motor is fixedly installed on the mounting frame.
5. The short-cut nitrification sewage treatment apparatus as claimed in claim 1, wherein the sewage treatment mechanism further comprises an aeration assembly and a gas transmission assembly, the aeration assembly is installed inside the sewage treatment tank, and the gas transmission assembly is disposed at one side of the sewage treatment tank.
6. The short-cut nitrification sewage treatment apparatus as set forth in claim 5, wherein the aeration assembly comprises a fixing frame disposed in the sewage treatment tank, and a plurality of aeration membranes mounted on the fixing frame, and a plurality of aeration holes are formed in the aeration membranes.
7. The short-cut nitrification sewage treatment apparatus as set forth in claim 6, wherein the gas transmission assembly comprises a blower provided at one side of the sewage treatment tank, and a gas transmission pipe connected to an air outlet of the blower, one end of the gas transmission pipe extending into the sewage treatment tank through a top wall of the sewage treatment tank and being connected to the aeration membrane.
8. The short-cut nitrification sewage treatment apparatus as claimed in claim 1, wherein the stirring mechanism comprises a holding tank, a stirring assembly installed on the holding tank, a conveying pipe arranged on the holding tank, and a conveying pump installed on the conveying pipe, a feed inlet is formed in the top wall of the holding tank, a water pipe is further connected to the top wall of the holding tank, one end of the water pipe is connected with a water source, and the conveying pipe is connected with the top wall of the sewage treatment tank.
9. The short-cut nitrification sewage treatment apparatus as claimed in claim 8, wherein the agitation assembly comprises an agitation motor installed at the top of the holding tank, an agitation shaft rotatably provided inside the holding tank, and an agitation blade fixedly installed on the agitation shaft, and an output shaft of the agitation motor extends through a top wall of the holding tank to the inside of the holding tank and is in transmission connection with the agitation shaft.
10. The short-cut nitrification sewage treatment apparatus as set forth in claim 8, further comprising a conveying mechanism, the conveying mechanism comprising a bottom plate, a conveying motor and a screw conveying pipe, the conveying motor being disposed on the bottom plate, the conveying motor being disposed at a bottom end of the screw conveying pipe, a feed hopper being disposed on the screw conveying pipe, the feed hopper being disposed at an end of the screw conveying pipe adjacent to the conveying motor, the end of the screw conveying pipe opposite to the feed hopper being disposed at the holding tank and being communicated with the feed inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320235492.7U CN219620969U (en) | 2023-02-16 | 2023-02-16 | Short-cut nitrification sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320235492.7U CN219620969U (en) | 2023-02-16 | 2023-02-16 | Short-cut nitrification sewage treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219620969U true CN219620969U (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320235492.7U Active CN219620969U (en) | 2023-02-16 | 2023-02-16 | Short-cut nitrification sewage treatment device |
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| Country | Link |
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| CN (1) | CN219620969U (en) |
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2023
- 2023-02-16 CN CN202320235492.7U patent/CN219620969U/en active Active
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