CN209098430U - A kind of pretreatment unit of high calcium desulfurization wastewater - Google Patents
A kind of pretreatment unit of high calcium desulfurization wastewater Download PDFInfo
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- CN209098430U CN209098430U CN201821649944.1U CN201821649944U CN209098430U CN 209098430 U CN209098430 U CN 209098430U CN 201821649944 U CN201821649944 U CN 201821649944U CN 209098430 U CN209098430 U CN 209098430U
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Abstract
The utility model discloses a kind of pretreatment units of high calcium desulfurization wastewater, including softening sedimentation basin, take off steady sedimentation basin, first sludge treatment equipment and the second sludge treatment equipment, soften and is equipped with softening reaction tank in sedimentation basin, first flocculation basin, first helps solidifying pond, first inclined-tube sedimentation tank and the first buffer tank, first inclined-tube sedimentation tank connects cyclone separator and magnetic separating device by sludge reflux pump, magnetic separating device connects the first sludge treatment equipment by sludge delivery pump three, softening sedimentation basin takes off steady sedimentation basin by water pump connection, it takes off in steady sedimentation basin and adds pond equipped with crystal seed, second flocculation basin, second helps solidifying pond, second inclined-tube sedimentation tank and the second buffering pond, second inclined-tube sedimentation tank connects crystal seed by crystal seed reflux pump and adds pond, and the second sludge treatment equipment is connected by sludge delivery pump two.The utility model can make high calcium desulfurization wastewater reach the water quality requirement into subsequent ultrafiltration processing unit after pretreatment, improve treatment effeciency and reduce cost.
Description
Technical field
The utility model relates to field of waste water treatment, the pretreatment unit of specifically a kind of high calcium desulfurization wastewater.
Background technique
Waste water refers to the general name of the water being discharged in resident's active procedure and runoff rainwater.It includes sanitary sewage, Industry Waste
Water and first rain diameter flow into other useless water such as sewer, refer generally to be unable to after certain technical treatment recycling or
The water of certain standard is not achieved in level-one pollution post-processing difficulty.It include multiple harmful substances in industrial wastewater, not by processing
High calcium desulfurization wastewater be expelled directly out, not only polluted source, can also damage environment, but existing high calcium desulfurization wastewater
Processing unit cost of investment is high, treatment and purification effect degree is low, and not energy saving enough, it is therefore desirable to a kind of novel Low investment, efficiently
The pretreatment unit of the high calcium desulfurization wastewater of rate, to meet the needs of to wastewater treatment.
Summary of the invention
It solves the problems, such as
It is low and not energy saving enough for existing high calcium desulfurizing waste water processing device cost of investment height, treatment and purification efficiency degree
The problem of, the purpose of this utility model is to provide a kind of pretreatment units of high calcium desulfurization wastewater, to solve above-mentioned background skill
The problem of being proposed in art.
Technical solution
To achieve the above object, the utility model provides the following technical solutions:
A kind of pretreatment unit of high calcium desulfurization wastewater, including soften sedimentation basin, take off steady sedimentation basin, the first Treatment of Sludge dress
Set with the second sludge treatment equipment, softening reaction tank is equipped in the softening sedimentation basin, the first flocculation basin, first helps solidifying pond, the
One inclined-tube sedimentation tank and the first buffer tank, first inclined-tube sedimentation tank connect cyclone separator, rotation by sludge reflux pump
Stream separator is equipped with the pipeline being connected with the first flocculation basin, and the input terminal of magnetic separating device, Magneto separate are connected by sludge pipe
Device is equipped with the pipeline being connected with the first flocculation basin, and the output end of magnetic separating device connects sludge delivery pump three by connecting tube
The output end of input terminal, sludge delivery pump three connects the first sludge treatment equipment by connecting tube, the first sludge treatment equipment
Sludge pipe is connected to filter residue processing unit, and the first sludge treatment equipment is equipped with drainage pipeline one, the connection softening of drainage pipeline one
Reaction tank, the softening reaction tank, the first flocculation basin, first help solidifying pond, the first inclined-tube sedimentation tank and the first buffer tank mutual
It is connected to, in the supernatant overflow to the first buffer tank in first inclined-tube sedimentation tank, the water in first buffer tank
Steady sedimentation basin is taken off by water pump connection, is taken off and is equipped with crystal seed in steady sedimentation basin and adds pond, the second flocculation basin, second help solidifying pond, second
Inclined-tube sedimentation tank and the second buffering pond, crystal seed add pond, the second flocculation basin, second help solidifying pond, the second inclined-tube sedimentation tank and the
Two buffering ponds are interconnected, and the second inclined-tube sedimentation tank connects crystal seed reflux pump, the crystal seed reflux pump connection by connecting tube
Crystal seed adds pond, and second inclined-tube sedimentation tank connects the second sludge treatment equipment by sludge delivery pump two, at the second sludge
Reason apparatus sewage sludge pipeline is connected to filter residue processing unit, and the second sludge treatment equipment is equipped with drainage pipeline two, and drainage pipeline two connects
It is seeded and adds pond.
As a further solution of the present invention: the softening reaction tank connects softening chemicals dosing plant by grug transportation tube,
First flocculation basin connects flocculant chemicals dosing plant by grug transportation tube, and first helps solidifying pond to help solidifying pond dosing by grug transportation tube connection
Device, second flocculation basin connect flocculant chemicals dosing plant two by grug transportation tube, and second helps solidifying pond to help by grug transportation tube connection
Solidifying pond chemicals dosing plant two.
The softening reaction tank, the first flocculation basin, first help solidifying pond, crystalline substance as a further solution of the present invention,
Kind add pond, the second flocculation basin and second helps in solidifying pond and is respectively equipped with machine mixer, the first inclined-tube sedimentation tank and the second inclined tube
Mud scraper is respectively equipped in sedimentation basin, there are the visor of observation mud position in the first inclined-tube sedimentation tank and the second inclined-tube sedimentation tank side.
The softening reaction tank, the first flocculation basin, first help solidifying pond, crystalline substance as a further solution of the present invention,
Kind add pond, the second flocculation basin and second helps in solidifying pond and is respectively equipped with machine mixer, the first inclined-tube sedimentation tank and the second inclined tube
Mud scraper is respectively equipped in sedimentation basin, there are the visor of observation mud position in the first inclined-tube sedimentation tank and the second inclined-tube sedimentation tank side.
First sludge treatment equipment and the second sludge treatment equipment are as a further solution of the present invention,
Any one in plate and frame filter press or decanter centrifuge.
The second inclined-tube sedimentation tank overflow is to the second buffering pond as a further solution of the present invention, and the
Two buffering ponds connect delivery pump by connecting tube, and delivery pump is connected to mechanical filter by connecting pipe.
The mechanical filter is quartz filter or fine sand filter as a further solution of the present invention,
Or any one in more medium filter, wherein quartz filter can be porous plate or cambered plate, filtering accuracy 45-
55 μm, quartz sand packed height 0.8-1.2 m, 0.2 m of cambered plate quartz filter bed course packed height, filter has
Backwash function, when pressure difference reaches 0.8-1 MPa, filter carries out backwash operation.
Beneficial effect
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model total system is rationally distributed easily-controllable, in conjunction with softening, takes off steady, coagulation, magnetic flocculation, tube settling,
High calcium desulfurization wastewater can be made to reach the water quality requirement into subsequent ultrafiltration processing unit after pretreatment.
(2) after the magnetic powder of the utility model once adds, in conjunction with when return-flow structure, can accomplish to recycle,
Without supplement, magnetic powder recycling can reach 98% or more, it is only necessary to the magnetic kind that supplement is lost on a small quantity.
(3) the utility model by rational proportion and is circularly set, and is greatly shortened the sedimentation time of suspended matter, is improved
Overall treatment efficiency, solve hardness existing in the prior art, basicity removal effect is bad, suspended substance sedimentation effect is bad,
The disadvantages of pre-processing low efficiency reduces cost of investment and improves treatment effeciency.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the pretreatment unit of high calcium desulfurization wastewater.
In figure: 1, softening sedimentation basin；2, steady sedimentation basin is taken off；3, soften reaction tank；4, soften chemicals dosing plant；5, flocculant adds
Medicine device；6, the first flocculation basin；7, solidifying pond chemicals dosing plant is helped；8, first solidifying pond is helped；9, the first inclined-tube sedimentation tank；10, first is slow
Waste preventer；11, sludge reflux pump；12, cyclone separator；13, magnetic separating device；14, the first sludge treatment equipment；15, water pump；
16, crystal seed adds pond；17, flocculant chemicals dosing plant two；18, the second flocculation basin；19, solidifying pond chemicals dosing plant two is helped；20, it second helps
Solidifying pond；21, the second inclined-tube sedimentation tank；22, the second buffering pond；23, delivery pump；24, mechanical filter；25, sludge delivery pump
Two；26, the second sludge treatment equipment；27, crystal seed reflux pump.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that described embodiment is only the utility model a part of the embodiment, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art institute without making creative work
The every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, a kind of pretreatment unit of high calcium desulfurization wastewater, including softening are heavy in the utility model embodiment
Shallow lake pond 1 takes off steady sedimentation basin 2, the first sludge treatment equipment 14 and the second sludge treatment equipment 26, sets in the softening sedimentation basin 1
There are softening reaction tank 3, the first flocculation basin 6, first to help solidifying pond 8, the first inclined-tube sedimentation tank 9 and the first buffer tank 10, described the
One inclined-tube sedimentation tank, 9 bottom is equipped with sewage draining exit, and sewage draining exit connects the input terminal of sludge reflux pump 11, sludge reflux by sewage pipe
The output end of pump 11 connects the input terminal of cyclone separator 12 by sludge pipe, and cyclone separator 12 is equipped with and the first flocculation basin 6
Connected pipeline, and by the input terminal of sludge pipe connection magnetic separating device 13, magnetic separating device 13 is equipped with and the first flocculation basin 6
Connected pipeline, the output end of magnetic separating device 13 connect the input terminal of sludge delivery pump three, sludge delivery pump by connecting tube
Three output end connects the first sludge treatment equipment 14 by connecting tube, and the sludge pipe of the first sludge treatment equipment 14 is connected to
Filter residue processing unit, the final sludge excluded in waste water, the first sludge treatment equipment 14 are equipped with drainage pipeline one, drainage pipeline one
Connection softening reaction tank 3, the softening reaction tank 3, the first flocculation basin 6, first help solidifying pond 8, the first inclined-tube sedimentation tank 9 and first
Buffer tank 10 is interconnected, in the supernatant overflow to the first buffer tank 10 in first inclined-tube sedimentation tank 9, described the
Water in one buffer tank 10 takes off steady sedimentation basin 2 by the connection of water pump 15, takes off and is equipped with crystal seed in steady sedimentation basin 2 and adds pond 16, the
Two flocculation basins 18, second help solidifying pond 20, the second inclined-tube sedimentation tank 21 and the second buffering pond 22, crystal seed to add the wadding of pond 16, second
Solidifying pond 18, second help solidifying pond 20, the second inclined-tube sedimentation tank 21 and the second buffering pond 22 to be interconnected, the second inclined-tube sedimentation tank 21
Crystal seed reflux pump 27 is connected by connecting tube, the crystal seed reflux pump connection crystal seed adds pond 16, second inclined-tube sedimentation tank
21 bottoms are equipped with discharge port, and the discharge port connects the input terminal of sludge delivery pump 2 25, sludge delivery pump 2 25 by pipeline
Output end the second sludge treatment equipment 26 is connected by pipeline, 26 sludge pipe of the second sludge treatment equipment is connected at filter residue
Device is managed, the second sludge treatment equipment 26 is equipped with drainage pipeline two, and drainage pipeline two connects crystal seed and adds pond 16；
Second inclined-tube sedimentation tank, 21 overflow to the second buffering pond 22, the second buffering pond 22 is connected by connecting tube
Delivery pump 23, delivery pump 23 are connected to mechanical filter 24 by connecting pipe, and mechanical filter 24 is connected by connecting pipe
After-treatment system, the mechanical filter 24 are any one in quartz filter or fine sand filter or more medium filter
Kind, wherein quartz filter can be porous plate or cambered plate, 45-55 μm of filtering accuracy, quartz sand packed height 0.8-
1.2 m, 0.2 m of cambered plate quartz filter bed course packed height, filter has the function of backwash, when pressure difference reaches 0.8-
When 1MPa, filter carries out backwash operation；
First sludge treatment equipment 14 and the second sludge treatment equipment 26 are plate and frame filter press or decanter centrifuge
In any one；
The softening reaction tank 3, the first flocculation basin 6, first help solidifying pond 8, crystal seed to add pond 16, the second flocculation basin 18 and
Two help in solidifying pond 20 and are respectively equipped with equipped with machine mixer, set respectively in the first inclined-tube sedimentation tank 9 and the second inclined-tube sedimentation tank 21
There is mud scraper, there are the visor of observation mud position in the first inclined-tube sedimentation tank 9 and 21 side of the second inclined-tube sedimentation tank, convenient for control sedimentation basin
Mud position controls sludge concentration, machine mixer and mud scraper by conducting wire and is electrically connected PLC control device；
The softening reaction tank 3 connects softening chemicals dosing plant 4 by grug transportation tube, and first flocculation basin 6 passes through grug transportation tube
Flocculant chemicals dosing plant 5 is connected, first helps solidifying pond 8 to help solidifying pond chemicals dosing plant 7 by grug transportation tube connection, and raw water enters softening precipitating
Softening reaction tank 3 in pond 1, softening chemicals dosing plant 4 add softening medicament into softening reaction tank 3, it is laggard to be sufficiently mixed reaction
Enter the first flocculation basin 6, flocculant chemicals dosing plant 5 adds flocculant into the first flocculation basin 6, and adds a certain amount of magnetic powder, fills
Divide after reaction and help solidifying pond 8 into first, helps solidifying pond chemicals dosing plant 7 to help in solidifying pond 8 to first and add flocculation aid, sufficiently react laggard
Enter and is precipitated in the first inclined-tube sedimentation tank 9；
Second flocculation basin 18 connects flocculant chemicals dosing plant 2 17 by grug transportation tube, and second helps solidifying pond 20 to pass through loading
Pipe connection helps solidifying pond chemicals dosing plant 2 19.
The working principle of the utility model is:
Raw water is by helping solidifying pond 8, the first inclined tube equipped with softening reaction tank 3, the first flocculation basin 6, first in softening sedimentation basin 1
Sedimentation basin 9 and 10 disengaging of the first buffer tank processing, help in solidifying pond 8 in softening reaction tank 3, the first flocculation basin 6, first and phase are added
The treatment agent answered handles raw water, and the first sludge treatment equipment 14 carries out filtering blowdown for the first time to raw water, and raw water is logical
It crosses 1 processing of softening sedimentation basin and enters and take off steady sedimentation basin 2, take off the crystal seed in steady sedimentation basin 2 and add pond 16, the second flocculation basin 18, the
Two help solidifying pond 20, the second inclined-tube sedimentation tank 21 and the second buffering pond 22 to reprocess raw water, improve treatment effeciency, processing
Raw water afterwards is transported to mechanical filter 24 by delivery pump 23, and mechanical filter 24 connects post-processing system by connecting pipe
System, handles raw water.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (6)
1. a kind of pretreatment unit of high calcium desulfurization wastewater, including softening sedimentation basin (1), take off steady sedimentation basin (2), at the first sludge
Manage device (14) and the second sludge treatment equipment (26), which is characterized in that softening reaction tank is equipped in the softening sedimentation basin (1)
(3), the first flocculation basin (6), first help solidifying pond (8), the first inclined-tube sedimentation tank (9) and the first buffer tank (10), and described first
By sludge reflux pump (11) connection cyclone separator (12), cyclone separator (12) is equipped with and the first wadding inclined-tube sedimentation tank (9)
Solidifying pond (6) connected pipeline, and by the input terminal of sludge pipe connection magnetic separating device (13), magnetic separating device (13) equipped with
The output end of the connected pipeline of first flocculation basin (6), magnetic separating device (13) connects the defeated of sludge delivery pump three by connecting tube
Enter end, the output end of sludge delivery pump three connects the first sludge treatment equipment (14) by connecting tube, the first sludge treatment equipment
(14) sludge pipe is connected to filter residue processing unit, and the first sludge treatment equipment (14) is equipped with drainage pipeline one, drainage pipeline
One connection softening reaction tank (3), the softening reaction tank (3), the first flocculation basin (6), first help solidifying pond (8), the first inclined tube heavy
Shallow lake pond (9) and the first buffer tank (10) are interconnected, and the supernatant overflow in first inclined-tube sedimentation tank (9) to first is delayed
In waste preventer (10), the water in first buffer tank (10) takes off steady sedimentation basin (2) by water pump (15) connection, takes off steady precipitating
Be equipped in pond (2) crystal seed add pond (16), the second flocculation basin (18), second help solidifying pond (20), the second inclined-tube sedimentation tank (21) and
Second buffering pond (22), crystal seed add pond (16), the second flocculation basin (18), second help solidifying pond (20), the second inclined-tube sedimentation tank
(21) it is interconnected with the second buffering pond (22), the second inclined-tube sedimentation tank (21) connects crystal seed reflux pump by connecting tube
(27), the crystal seed reflux pump connection crystal seed adds pond (16), and second inclined-tube sedimentation tank (21) passes through sludge delivery pump two
(25) the second sludge treatment equipment (26) being connected, the second sludge treatment equipment (26) sludge pipe is connected to filter residue processing unit,
Second sludge treatment equipment (26) is equipped with drainage pipeline two, and drainage pipeline two connects crystal seed and adds pond (16).
2. a kind of pretreatment unit of high calcium desulfurization wastewater according to claim 1, which is characterized in that the softening reaction
Pond (3) connects softening chemicals dosing plant (4) by grug transportation tube, and first flocculation basin (6) connects flocculant dosing by grug transportation tube
Device (5), first helps solidifying pond (8) to help solidifying pond chemicals dosing plant (7) by grug transportation tube connection, and second flocculation basin (18) passes through defeated
Pencil connects flocculant chemicals dosing plant two (17), and second helps solidifying pond (20) to help solidifying pond chemicals dosing plant two by grug transportation tube connection
(19).
3. a kind of pretreatment unit of high calcium desulfurization wastewater according to claim 1, which is characterized in that the softening reaction
Pond (3), the first flocculation basin (6), first help that solidifying pond (8), crystal seed add pond (16), the second flocculation basin (18) and second helps solidifying pond
(20) it is respectively equipped with machine mixer in, is respectively equipped in the first inclined-tube sedimentation tank (9) and the second inclined-tube sedimentation tank (21) and scrapes mud
There are the visor of observation mud position in machine, the first inclined-tube sedimentation tank (9) and the second inclined-tube sedimentation tank (21) side.
4. a kind of pretreatment unit of high calcium desulfurization wastewater according to claim 1, which is characterized in that first sludge
Processing unit (14) and the second sludge treatment equipment (26) are any one in plate and frame filter press or decanter centrifuge.
5. a kind of pretreatment unit of high calcium desulfurization wastewater according to claim 1, which is characterized in that second inclined tube
To the second buffering pond (22), the second buffering pond (22) connects delivery pump (23) by connecting tube, defeated for sedimentation basin (21) overflow
Pump (23) is sent to be connected to mechanical filter (24) by connecting pipe.
6. a kind of pretreatment unit of high calcium desulfurization wastewater according to claim 5, which is characterized in that the mechanical filter
Device (24) is any one in quartz filter or fine sand filter or more medium filter, wherein quartz filter
Can be porous plate or cambered plate, 45-55 μm of filtering accuracy, quartz sand packed height 0.8-1.2 m, cambered plate quartz sand mistake
0.2 m of filter bed course packed height, filter have the function of backwash, and when pressure difference reaches 0.8-1 MPa, filter carries out backwash
Operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821649944.1U CN209098430U (en) | 2018-10-11 | 2018-10-11 | A kind of pretreatment unit of high calcium desulfurization wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821649944.1U CN209098430U (en) | 2018-10-11 | 2018-10-11 | A kind of pretreatment unit of high calcium desulfurization wastewater |
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| Publication Number | Publication Date |
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| CN209098430U true CN209098430U (en) | 2019-07-12 |
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ID=67154773
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821649944.1U Active CN209098430U (en) | 2018-10-11 | 2018-10-11 | A kind of pretreatment unit of high calcium desulfurization wastewater |
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| CN (1) | CN209098430U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179743A (en) * | 2018-08-22 | 2019-01-11 | 烟台金正环保科技有限公司 | A kind of waste water pretreatment system and method for high calcium sulfate salinity |
-
2018
- 2018-10-11 CN CN201821649944.1U patent/CN209098430U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109179743A (en) * | 2018-08-22 | 2019-01-11 | 烟台金正环保科技有限公司 | A kind of waste water pretreatment system and method for high calcium sulfate salinity |
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| CP02 | Change in the address of a patent holder |
Address after: 264000 Ruida Road, Laishan Economic Development Zone, Yantai City, Shandong Province Patentee after: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Address before: 264000 Ruida Road, Laishan Economic Development Zone, Qingdao City, Shandong Province Patentee before: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A pretreatment device for high calcium desulfurization wastewater Effective date of registration: 20210506 Granted publication date: 20190712 Pledgee: Yantai Xincai Haohan Investment Center (L.P.) Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2021980003272 |
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Date of cancellation: 20211021 Granted publication date: 20190712 Pledgee: Yantai Xincai Haohan Investment Center (L.P.) Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2021980003272 |
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Denomination of utility model: A pretreatment device for high calcium desulfurization wastewater Effective date of registration: 20211118 Granted publication date: 20190712 Pledgee: Yantai Xincai Haohan Investment Center (L.P.) Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2021370000138 |
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Date of cancellation: 20220628 Granted publication date: 20190712 Pledgee: Yantai Xincai Haohan Investment Center (L.P.) Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2021370000138 |
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Denomination of utility model: A pretreatment device for high calcium desulfurization wastewater Effective date of registration: 20220714 Granted publication date: 20190712 Pledgee: Yantai Xincai Haohan Investment Center (L.P.) Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2022370000086 |
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Denomination of utility model: A pretreatment device for high calcium desulfurization wastewater Effective date of registration: 20230112 Granted publication date: 20190712 Pledgee: Yantai Xincai Haohan Investment Center (L.P.) Pledgor: YANTAI JINZHENG ECO-TECHNOLOGY Co.,Ltd. Registration number: Y2023370000014 |
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