CN218478613U - Upward flow denitrification filter tank with external water distribution and air distribution chamber - Google Patents
Upward flow denitrification filter tank with external water distribution and air distribution chamber Download PDFInfo
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- CN218478613U CN218478613U CN202222517514.7U CN202222517514U CN218478613U CN 218478613 U CN218478613 U CN 218478613U CN 202222517514 U CN202222517514 U CN 202222517514U CN 218478613 U CN218478613 U CN 218478613U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 139
- 238000011001 backwashing Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims description 21
- 239000007789 gas Substances 0.000 abstract description 29
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 25
- 238000001914 filtration Methods 0.000 abstract description 23
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 12
- 238000005265 energy consumption Methods 0.000 abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 239000001301 oxygen Substances 0.000 abstract description 3
- 238000006213 oxygenation reaction Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 239000010865 sewage Substances 0.000 description 7
- 230000001651 autotrophic effect Effects 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000000813 microbial effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- YBVAXJOZZAJCLA-UHFFFAOYSA-N nitric acid nitrous acid Chemical compound ON=O.O[N+]([O-])=O YBVAXJOZZAJCLA-UHFFFAOYSA-N 0.000 description 1
- 230000001706 oxygenating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 235000017281 sodium acetate Nutrition 0.000 description 1
- 239000001632 sodium acetate Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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Classifications
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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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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The utility model relates to an upward flow denitrification filter with an external water distribution and air distribution chamber, which comprises a filter body and a water distribution and air distribution chamber arranged outside the filter body; the bottom in the filter body is provided with a water and gas distribution system, the lower part of the water and gas distribution chamber is communicated with the water and gas distribution system at the bottom of the filter body, the water and gas distribution chamber is provided with a water inlet pipe, a backwashing air inlet pipe, a backwashing water inlet pipe and an exhaust pipe, and the upper part of the filter body is provided with a water outlet pipe and a backwashing water drain pipe. The water distribution and air distribution chamber is arranged outside the filter body to distribute water and air to the denitrification filter, a water distribution channel is not required to be arranged at the bottom of the filter, the utilization efficiency of the filter is improved, the upflow type filtering is combined, the dead zone of backwashing can be avoided, effective backwashing can be carried out on the whole filtering surface, the upflow type denitrification filter can avoid drop oxygenation, the dissolved oxygen concentration in the denitrification stage is effectively ensured, the water and air flow in the same direction, a nitrogen driving device can be omitted, and the energy consumption and the construction cost of the denitrification filter are saved.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment device, a upflow denitrification filter tank of external distribution water gas distribution chamber is related to.
Background
Along with the increasingly prominent water pollution problem in China, the discharge standard of town sewage treatment is gradually improved, and the total nitrogen concentration of effluent is further strictly controlled. At present, a plurality of sewage deep denitrification processes are provided, wherein a denitrification biological filter integrates the functions of filtration and denitrification, has advantages in the aspects of maintenance cost and denitrification efficiency, and shows good development prospect and market value. However, the traditional denitrification filter tank has the problems of low utilization rate of the tank volume, complex operation, high energy consumption, high cost and the like. The method comprises the following specific steps:
inside traditional denitrification filtering pond arranged water distribution gas distribution chamber in denitrification filtering pond, this type of structure easily leads to the filtering pond inner space on water distribution gas distribution chamber upper portion to form backwash "blind area", and can reduce the pond of filtering pond and hold the utilization ratio, increases the filtering pond construction cost. The conventional downward flow denitrification deep bed filter tank is easy to cause the concentration of dissolved oxygen in the filter tank to rise due to the fact that water inflow falls and is oxygenated, a large amount of aerobic bacteria can be propagated on the surface of a filter material, the denitrification efficiency is reduced, downward flow water flows and nitrogen gas reversely flow to form an air blockage phenomenon, mechanical nitrogen driving is required to be carried out to recover a water head, and the operation cost is increased. In addition, the existing denitrification filter tank adopts a heterotrophic denitrification process, and needs to depend on an external carbon source such as methanol, sodium acetate or glucose and other substances, so that the sewage treatment cost is increased; meanwhile, the adding amount of the carbon source needs to be accurately controlled, otherwise, the COD of the effluent exceeds the standard, and the effluent quality is influenced. Heterotrophic denitrification has high sludge yield coefficient due to fast microbial proliferation, frequent back flushing of the filter, and increased sewage running cost.
Therefore, a filter tank which can effectively solve the above problems is urgently needed.
Disclosure of Invention
An object of the utility model is to prior art not enough, provide an upstream denitrification filtering pond of external water distribution air distribution chamber, the mode that adopts external water distribution air distribution chamber has not only improved the filtering pond and has held the utilization ratio, and can realize the back flush to the full filter surface, and no backwash "blind area", the drop oxygenation is avoided in combination to the upstream, can effectively ensure denitrification and denitrogenation efficiency, and need not additionally drive nitrogen machinery, the energy consumption is low.
The utility model adopts the technical scheme as follows:
an upward flow denitrification filter with an external water distribution and air distribution chamber comprises a filter body and a water distribution and air distribution chamber arranged outside the filter body; the bottom in the filter body is provided with a water and gas distribution system, the lower part of the water and gas distribution chamber is communicated with the water and gas distribution system at the bottom of the filter body, the water and gas distribution chamber is provided with a water inlet pipe, a backwashing air inlet pipe, a backwashing water inlet pipe and an exhaust pipe, and the upper part of the filter body is provided with a water outlet pipe and a backwashing water drain pipe.
In the above technical scheme, further, the water inlet pipe and the backwash water inlet pipe are both located at the lower part of the water and gas distribution chamber, and the backwash air inlet pipe and the exhaust pipe are located at the top of the water and gas distribution chamber.
Further, inlet tube one end and water distribution gas distribution room UNICOM, the other end is connected outside pipeline, divide into two the tunnel, and all is equipped with the valve on every way pipeline, and is preferred, when the filtering pond is used for the sewage advanced treatment unit, wherein can go out water piping connection with front end secondary treatment unit all the way, another way can extend front end grid pond or equalizing basin.
Furthermore, a manual valve and a breather valve are sequentially connected to the exhaust pipe.
Furthermore, the filter body is sequentially provided with a water distribution layer, a supporting layer, a filter material layer and a clear water layer from bottom to top, the water distribution and gas distribution system is arranged on the water distribution layer, the upper part of the filter body is provided with a water outlet weir which is arranged along the peripheral direction in the filter, one end of the water outlet pipe and one end of the back flush drain pipe are both connected with the water outlet weir, and the other end of the water outlet pipe and the other end of the back flush drain pipe are both positioned outside the filter body.
Still further, the water and gas distribution system can adopt filter bricks.
Furthermore, cobblestones can be adopted as the bearing layer, and the particle sizes are preferably 16-32 mm and 8-16 mm from bottom to top respectively.
Furthermore, the filter material layer can adopt a sulfur autotrophic denitrification filter material, and the preferred particle size is 2-5 mm.
Furthermore, the top of the water distribution and air distribution chamber is provided with an access hole.
The beneficial effects of the utility model reside in that:
the denitrification filter chamber of the utility model can carry out the back washing of the whole filtering surface by arranging the water and air distribution chamber outside the denitrification filter chamber, thereby ensuring the filtering area of the filter chamber, avoiding the dead zone of the back washing, avoiding the water distribution channel at the bottom of the filter chamber and improving the utilization rate of the tank volume; by adopting an upward flow water inlet mode, water to be filtered enters from the bottom of the filter tank and is completely isolated from air, so that the growth of denitrifying microorganisms is facilitated, the denitrification efficiency is greatly improved, the direction of the filtered water flow is consistent with the diffusion direction of nitrogen, the water flow can drive the nitrogen to diffuse upwards during filtering, no air blockage is formed, and no additional nitrogen driving device is needed; in addition, the filter material adopts an autotrophic denitrification filter material, which is more favorable for removing the total nitrogen in the water body, and has low operation cost and good effluent quality.
Drawings
FIG. 1: the utility model is a top view of a concrete example structure;
FIG. 2 is a schematic diagram: FIG. 1 isbase:Sub>A sectional view taken along line A-A;
description of the drawings: 1-filter body, 2-water distribution and air distribution chamber, 3-water inlet pipe, 4-water outlet pipe, 5-backwash air inlet pipe, 6-backwash water inlet pipe, 7-backwash water outlet pipe, 8-exhaust pipe, 81-exhaust pipe manual valve, 82-exhaust pipe breather valve, 9-access hole and 10-water outlet weir.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
As shown in fig. 1-2, for a specific implementation manner of the denitrification filter provided by the present invention, the filter includes a filter body 1, a water distribution and air distribution chamber 2 is provided outside the filter body 1, and the height of the water distribution and air distribution chamber 2 is usually lower than that of the filter body 1, and can also be set according to specific requirements; the bottom in the filter body 2 is provided with a water and gas distribution system, the lower part of the water and gas distribution chamber 2 is communicated with the water and gas distribution system at the bottom of the filter body 1, the water and gas distribution chamber 2 is provided with a water inlet pipe 3, a back flush air inlet pipe 5, a back flush water inlet pipe 6 and an exhaust pipe 8, and the upper part of the filter body 1 is provided with a water outlet pipe 4 and a back flush drain pipe 7.
Wherein, the water inlet pipe 3, the back washing air inlet pipe 5 and the back washing water inlet pipe 6 are all positioned at the lower part of the water distribution air distribution chamber 2, and the back washing air inlet pipe and the exhaust pipe 8 are positioned at the top of the water distribution air distribution chamber 2. One end of the water inlet pipe 3 is communicated with the water and air distribution chamber, the other end of the water inlet pipe is connected with an external pipeline and is divided into two paths, and each path of pipeline is provided with a valve; the other path can extend to a front end grating pool or a regulating pool and is used for emptying during maintenance; one end of the back washing air inlet pipe 5 is connected with the water distribution and air distribution chamber, and the other end is connected with the fan; the backwashing water inlet pipe 6 is connected with a backwashing water pump; the exhaust pipe 8 is sequentially connected with a manual valve 81 and a breather valve 82, and automatic exhaust of the water distribution and air distribution chamber can be realized through the breather valve during the operation of the filter tank after the manual valve 81 is opened, so that the operation is simple; each pipeline is provided with a valve for controlling the on-off of the pipeline. In addition, the top of the water and gas distribution chamber is provided with an access hole for access.
The interior of the filter body 1 can be sequentially provided with a water distribution layer, a supporting layer, a filter material layer and a clear water layer from bottom to top, the water distribution and gas distribution system is arranged on the water distribution layer, and the water distribution and gas distribution system can be realized by adopting filter bricks or other materials with the functions of water distribution and gas distribution; the bearing layer can adopt high-quality cobblestones and is paved on the water and gas distribution system, and further preferably, the cobblestones have the grain diameters of 16-32 mm and 8-16 mm from bottom to top; the filter material layer adopts a sulfur autotrophic denitrification filterThe material preferably has a particle size of 2-5 mm, and adopts sulfur autotrophic denitrification filter material, compared with heterotrophic denitrification filter material, the autotrophic denitrification can use reduced inorganic substance as electron donor and inorganic Carbon (CO) 2 、HCO 3 - 、CO 3 2- ) The nitrate nitrogen is reduced into gaseous nitrogen as a carbon source, so that the total nitrogen in the water body is removed, the carbon source is not required to be added, the COD exceeding risk is avoided, the sludge yield is low, the operation is simple, the operation cost is low, and the effluent quality is good; the upper part of the filter body is provided with an effluent weir which is arranged along the inner periphery of the filter, one end of each of the effluent pipe and the backwash drain pipe is connected with the effluent weir, the other end of each of the effluent pipe and the backwash drain pipe is positioned outside the filter body, the treated clean water is discharged from the effluent weir through the effluent pipe and enters the next treatment unit or is discharged, and the backwashed drain water can be discharged into the pretreatment units such as a front-end grid pool or a regulating pool through the backwash drain pipe.
The utility model discloses an upstream denitrification filter of external distribution water gas distribution chamber is at the operation stage, closes back flush drain valve, fan, backwash water pump, opens water intaking valve, outlet valve and the manual valve of exhaust, and sewage gets into the filter bottom through inlet tube and distribution water gas distribution chamber, passes through the distribution layer in proper order, bearing layer, filter material layer, and upward flow because the big specific surface area of filter material can adhere to complicated microbial flora in the filter process, and (nitrite) takes place the chemical reaction with the filter material under the microbial action:
1.1S 0 +NO 3 - +0.76H 2 O+0.4CO 2 +0.08NH 4 + →0.5N 2 +1.10SO 4 2- +1.28H + +0.08C 5 H 7 O 2 N
nitrate (nitrite) is converted into nitrogen to escape, and suspended matters are intercepted by the filter material. The treated water flows from the effluent weir into the effluent pipe and then into the next treatment unit or discharge well.
Along with the operation of the filter tank, more and more pollutants are attached to the filler, the filtering speed and the filtering effect are reduced, at the moment, back washing is needed, and the back washing can be performed according to the steps of air back washing, air-water combined back washing and water back washing in sequence, namely: closing the water inlet valve, the water outlet valve and the manual exhaust valve, starting the fan and the backwashing drain valve, performing large-air-volume aeration washing on the filter, starting the backwashing water pump after a period of time, performing air-water combined backwashing, closing the fan after a period of time, performing large-flow hydraulic rinsing on the filter, and continuing a period of time; the specific steps of the backwashing can also be set according to specific requirements.
Pollutants attached to the filter material in the backwashing stage flow into a backwashing water discharge pipe along with water flow through the water outlet weir and then are discharged into a pretreatment unit such as a front-end grating pool or an adjusting pool, and the filter material is recycled; the washing period of the filter material is about 7 to 30 days. Particularly, when the sulfur autotrophic denitrification filter material is adopted, the effluent quality is good, the sludge yield is low, and the backwashing frequency of the filter tank can be greatly reduced; when the filter tank needs to be overhauled, the emptying valve is opened to empty the water in the filter tank.
The utility model discloses a denitrification filtering pond is through carrying out denitrification filtering pond water distribution gas distribution in filtering pond body outside with water distribution gas distribution room setting, has not only improved the filtering pond and has held the utilization efficiency, combine upstream type filtration, can avoid backwash "blind area", can all carry out effective back flush to full filter surface, and the denitrification filtering pond of upstream type can avoid drop oxygenating, effectively guarantee the dissolved oxygen concentration in the denitrification stage, the aqueous vapor syntropy flows, can save and drive nitrogen device, practice thrift energy consumption and denitrification filtering pond construction cost.
Claims (6)
1. An upflow denitrification filter with an external water distribution air distribution chamber is characterized by comprising a filter body and a water distribution air distribution chamber arranged outside the filter body; the bottom in the filter body is provided with a water and gas distribution system, the lower part of the water and gas distribution chamber is communicated with the water and gas distribution system at the bottom of the filter body, the water and gas distribution chamber is provided with a water inlet pipe, a backwashing air inlet pipe, a backwashing water inlet pipe and an exhaust pipe, and the upper part of the filter body is provided with a water outlet pipe and a backwashing water drain pipe.
2. The upward flow denitrification filter with an external water distribution and air distribution chamber of claim 1, wherein the water inlet pipe and the backwash water inlet pipe are both positioned at the lower part of the water distribution and air distribution chamber, and the backwash air inlet pipe and the backwash air outlet pipe are positioned at the top of the water distribution and air distribution chamber.
3. The upward flow denitrification filter with the external water distribution and air distribution chamber as claimed in claim 1, wherein one end of the water inlet pipe is communicated with the water distribution and air distribution chamber, the other end of the water inlet pipe is connected with an external pipeline, the water inlet pipe is divided into two pipelines, and each pipeline is provided with a valve.
4. The upward flow denitrification filter with an external water distribution and air distribution chamber as claimed in claim 1, wherein the exhaust pipe is connected with a manual valve and a breather valve in sequence.
5. The upward flow denitrification filter with the external water distribution and air distribution chamber as claimed in claim 1, wherein the filter body comprises a water distribution layer, a support layer, a filter material layer and a clear water layer from bottom to top in sequence, the water distribution and air distribution system is arranged on the water distribution layer, the upper part of the filter body is provided with an effluent weir which is arranged along the inner periphery of the filter body, one end of each of the effluent pipe and the backwash drain pipe is connected with the effluent weir, and the other end of each of the effluent pipe and the backwash drain pipe is positioned outside the filter body.
6. The upward flow denitrification filter with the external water distribution and air distribution chamber as claimed in claim 1, wherein the top of the water distribution and air distribution chamber is provided with an access hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222517514.7U CN218478613U (en) | 2022-09-22 | 2022-09-22 | Upward flow denitrification filter tank with external water distribution and air distribution chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222517514.7U CN218478613U (en) | 2022-09-22 | 2022-09-22 | Upward flow denitrification filter tank with external water distribution and air distribution chamber |
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| Publication Number | Publication Date |
|---|---|
| CN218478613U true CN218478613U (en) | 2023-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222517514.7U Active CN218478613U (en) | 2022-09-22 | 2022-09-22 | Upward flow denitrification filter tank with external water distribution and air distribution chamber |
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| Country | Link |
|---|---|
| CN (1) | CN218478613U (en) |
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2022
- 2022-09-22 CN CN202222517514.7U patent/CN218478613U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An Upflow Denitrifying Filter with an External Water Distribution Chamber Effective date of registration: 20231022 Granted publication date: 20230214 Pledgee: Hangzhou High-tech Financing Guarantee Co.,Ltd. Pledgor: Zhejiang Zheda Water Industry Co.,Ltd. Registration number: Y2023330002444 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |