CN209778573U - Limestone tailing sewage treatment plant - Google Patents
Limestone tailing sewage treatment plant Download PDFInfo
- Publication number
- CN209778573U CN209778573U CN201822203627.3U CN201822203627U CN209778573U CN 209778573 U CN209778573 U CN 209778573U CN 201822203627 U CN201822203627 U CN 201822203627U CN 209778573 U CN209778573 U CN 209778573U
- Authority
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- China
- Prior art keywords
- tank
- water inlet
- limestone
- pump
- sedimentation tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000010865 sewage Substances 0.000 title claims abstract description 49
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 28
- 239000006028 limestone Substances 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000004062 sedimentation Methods 0.000 claims abstract description 37
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 23
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 23
- 239000004571 lime Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 23
- 239000000945 filler Substances 0.000 claims abstract description 20
- 238000004659 sterilization and disinfection Methods 0.000 claims abstract description 19
- 239000011941 photocatalyst Substances 0.000 claims abstract description 18
- 239000004576 sand Substances 0.000 claims abstract description 15
- 239000012528 membrane Substances 0.000 claims abstract description 14
- 239000010453 quartz Substances 0.000 claims abstract description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 12
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 239000010457 zeolite Substances 0.000 claims abstract description 12
- 238000005273 aeration Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 241001464837 Viridiplantae Species 0.000 claims description 4
- 239000005341 toughened glass Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 1
- 239000013049 sediment Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 8
- 239000003054 catalyst Substances 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 10
- 238000006386 neutralization reaction Methods 0.000 description 8
- 239000002351 wastewater Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 5
- 239000008267 milk Substances 0.000 description 4
- 210000004080 milk Anatomy 0.000 description 4
- 235000013336 milk Nutrition 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000007726 management method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 241000893018 Armeria Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000000159 acid neutralizing agent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Landscapes
- Physical Water Treatments (AREA)
- Catalysts (AREA)
Abstract
the utility model discloses a limestone tailing sewage treatment device, which comprises a lime dissolving tank, a water inlet pump, a water delivery pipe, a sewage inlet, a sedimentation tank, a heater, a water inlet pipe, a water inlet, a light source, a rotating shaft, a filter screen, an ultraviolet disinfection lamp, a separating layer, a stirring rod, a rotating disc, a filter tank, a booster pump, a water outlet, an aeration pump, cobblestone filler, a photocatalyst, a fiber membrane, an inlet, a quartz fine sand layer, zeolite limestone filler and a residue discharge port, wherein the heater is arranged above the photocatalyst and close to the inner wall of the lime dissolving tank, the utility model has novel structure, uses a lamp tube as the light source, saves resources and protects environment, uses the chemical reaction generated by the catalyst to ensure that the water outlet quality is high, can pretreat sewage by arranging the lime dissolving tank, sets the stirring rod, the ultraviolet disinfection lamp and the filter screen, and effectively improves, the purification effect is obvious and the treatment effect is good.
Description
Technical Field
The utility model relates to a water treatment facilities technical field specifically is a lime stone tailing sewage treatment plant.
Background
With the continuous development of economy and population growth, particularly today of high-speed development of economy in China, various pollutions are created while benefits are created, water resource shortage becomes a limiting factor for restricting further development in China, in order to realize sustainable development, the resource recycling of sewage becomes a key for realizing the aim, acidic wastewater is directly discharged into a water body without being treated, a receiving water body is acidified, the pH is reduced, aquatic organisms are harmed, and potential corrosivity is generated. The acidic wastewater can also destroy the soil structure and reduce the crop yield. There are many methods for treating acidic wastewater, such as neutralization with alkali, limestone neutralization, lime milk neutralization, alkaline wastewater neutralization, etc. The neutralization method by adding caustic soda has high operation cost and is not suitable for large water treatment projects. The method is best to use the alkaline waste water for neutralization, but no considerable amount of alkaline waste water can be used in the general engineering, so the best choice is a lime milk neutralization method, and the lime milk is used as a neutralization agent, so that the waste water can reach the standard stably after being treated, and the cost is low. The key of the lime milk neutralization method lies in how to guarantee higher chemical dosing effect, can accurately control the chemical dosing amount to reduce the treatment cost and simultaneously guarantee the operation and the operation convenience, the effluent quality of sewage treated by the existing limestone tailing sewage treatment device has certain limitation, the material consumption is high, the cost is high, and simultaneously, the structure is too complex, the efficiency of sewage purification is not high, and the technical requirement of the current higher sewage purification can not be met.
SUMMERY OF THE UTILITY MODEL
The utility model provides a limestone tailing sewage treatment plant to solve the problem that proposes among the above-mentioned background art.
In order to solve the technical problem, the utility model provides a following technical scheme: a limestone tailing sewage treatment device comprises a lime dissolving tank, a water inlet pump, a water delivery pipe, a sewage inlet, a sedimentation tank, a heater, a water inlet pipe, a water inlet, a light source, a rotating shaft, a filter screen, an ultraviolet disinfection lamp, a separating layer, a stirring rod, a rotating disc, a filter tank, a booster pump, a water outlet, an aeration pump, a cobble filler, a photocatalyst, a fiber membrane, an inlet, a quartz fine sand layer, a zeolite limestone filler and a residue discharge port, wherein the lime dissolving tank is externally provided with the inlet above one side, the quartz fine sand layer is arranged below the inlet and inside the lime dissolving tank, the zeolite limestone filler is arranged below the quartz fine sand layer, the cobble filler is filled below the zeolite limestone filler, the water inlet pump is arranged below one side of the lime dissolving tank, and the water delivery pipe is connected above the water inlet pump, one end of the water pipe is connected with a sewage inlet, a fiber membrane is arranged inside the sedimentation tank, a photocatalyst is arranged outside the fiber membrane, a heater is arranged above the photocatalyst and close to the inner wall of the sedimentation tank, an aeration pump is arranged below the photocatalyst and at the position of the sedimentation tank, light sources are arranged on two sides of the sedimentation tank, the bottom of the sedimentation tank is arranged at the right side of the sedimentation tank and is provided with a booster pump through a water outlet, a water inlet pipe is arranged at the right side of the booster pump, a water inlet is connected to the right side of the water inlet pipe and is connected with the filtering tank through a water inlet, a rotating disc is arranged at the bottom of the filtering tank, a rotating shaft is arranged above the rotating disc, stirring rods are arranged on the left side and the right side of the rotating shaft, a filter screen is arranged inside, the lower part of the filter screen is provided with a separation layer, an ultraviolet disinfection lamp is arranged above the filter screen, and a residue discharge port is arranged at the position, close to one side, of the bottom end of the filter tank.
Furthermore, the number of the ultraviolet disinfection lamps is two, and the ultraviolet disinfection lamps are symmetrically distributed on two sides of the inner wall of the filter tank.
Further, the sedimentation tank is cylindrical structure, and the bottom of sedimentation tank is provided with the precipitate treatment tank, and the sedimentation tank is the component of a toughened glass material.
Furthermore, the number of the stirring rods is one, and the stirring rods are distributed on the left side and the right side of the rotating shaft.
Furthermore, green plants are planted outside the quartz fine sand layer.
Furthermore, a PH analyzer and a flowmeter are arranged in the filtering tank.
compared with the prior art, the beneficial effects of the utility model are that: this kind of lime stone tailing sewage treatment plant, moreover, the steam generator is simple in structure, area is little, can effectively practice thrift plant area and cost, utilize the fluorescent tube as the light source, resources are saved and the environmental protection, utilize the chemical reaction that the catalyst takes place, make a water quality high, through setting up the lime dissolving tank, can carry out the preliminary treatment to sewage, set up the stirring rod, ultraviolet ray disinfection lamp and filter screen, effectively improve the purification efficiency to sewage, it is showing to make purifying effect, it is good to have a treatment effect, the treatment effeciency is high, the anti-impact load capacity is strong, the operation is stable, the investment working costs is low, convenient management, characteristics such as pleasing to the eye practicality, better development prospect has, suitable using widely.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
in the drawings:
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the lime-adding dissolving tank of the present invention;
FIG. 3 is a schematic structural view of the sedimentation tank of the present invention;
In the figure: 1. a lime dissolving tank; 2. a water inlet pump; 3. a water delivery pipe; 4. a sewage inlet; 5. a sedimentation tank; 6. a heater; 7. a water inlet pipe; 8. a water inlet; 9. a light source; 10. a rotating shaft; 11. a filter screen; 12. an ultraviolet disinfection lamp; 13. a separation layer; 14. a stirring rod; 15. rotating the disc; 16. a filtration tank; 17. a booster pump; 18. a water outlet; 19. an aeration pump; 20. filling cobblestones; 21. a photocatalyst; 22. a fibrous membrane; 23. an inlet; 24. a fine sand layer of quartz; 25. zeolite limestone filler; 26. and a residue outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a limestone tailing sewage treatment device comprises a lime dissolving tank 1, a water inlet pump 2, a water delivery pipe 3, a sewage inlet 4, a sedimentation tank 5, a heater 6, a water inlet pipe 7, a water inlet 8, a light source 9, a rotating shaft 10, a filter screen 11, an ultraviolet disinfection lamp 12, a separating layer 13, a stirring rod 14, a rotating disc 15, a filter tank 16, a booster pump 17, a water outlet 18, an aeration pump 19, a cobble filler 20, a photocatalyst 21, a fiber membrane 22, an inlet 23, a quartz fine sand layer 24, a zeolite limestone filler 25 and a residue outlet 26, wherein the inlet 23 is arranged at the position above one side outside the lime dissolving tank 1, the quartz fine sand layer 24 is arranged inside the lime dissolving tank 1 below the inlet 23, the zeolite limestone filler 25 is arranged below the quartz fine sand layer 24, the cobble filler 20 is filled below the zeolite limestone filler 25, the water inlet pump 2 is arranged at the position below one side of the lime dissolving tank 1, the water inlet pump 2 is connected with a water pipe 3 above, one end of the water pipe 3 is connected with a sewage inlet 4, a fiber membrane 22 is arranged inside the sedimentation tank 5, a photocatalyst 21 is arranged outside the fiber membrane 22, a heater 6 is arranged above the photocatalyst 21 and close to the inner wall of the sedimentation tank 5, an aeration pump 19 is arranged below the photocatalyst 21 and at the bottom end of the sedimentation tank 5, light sources 9 are arranged at two sides outside the sedimentation tank 5, a booster pump 17 is arranged at the right side of the sedimentation tank 5 and through a water outlet 18, a water inlet pipe 7 is arranged at the right side of the booster pump 17, a water inlet 8 is connected at the right side of the water inlet pipe 7, the water inlet pipe 7 is connected with a filter tank 16 through a water inlet 8, a rotating disc 15 is arranged at the bottom end inside the filter tank 16, a rotating shaft 10 is arranged above the rotating disc 15, and stirring rods 14 are arranged, the filter tank 16 is internally provided with a filter screen 11, a separating layer 13 is arranged below the filter screen 11, the ultraviolet disinfection lamps 12 are arranged above the filter screen 11, a residue discharge port 26 is arranged at a position, close to one side, of the bottom end of the filter tank 16, the number of the ultraviolet disinfection lamps 12 is two, the ultraviolet disinfection lamps 12 are symmetrically distributed at two sides of the inner wall of the filter tank 16, the sewage can be disinfected and sterilized, and the purification efficiency is improved, the sedimentation tank 5 is of a cylindrical structure, the bottom end of the sedimentation tank 5 is provided with a precipitate treatment tank, the sedimentation tank 5 is a component made of toughened glass, so that precipitates precipitated by a sewage well of the sedimentation tank 5 are effectively treated and collected, the energy is saved, the environment is protected, the number of the stirring rods 14 is 8, the stirring rods 14 are distributed at the left side and the right side of the rotating shaft 10, the stirring is convenient, the purification quality of the sewage is improved, and green plants are planted, in the actual use process of the limestone tailing sewage treatment device, firstly, sewage sequentially passes through a quartz fine sand layer 24, a zeolite limestone filler 25 and a cobblestone filler 20 through an inlet 23 and enters the interior of a lime dissolving tank 1, green plants are planted outside the quartz fine sand layer 24 to facilitate effective removal of pollutants such as oxygen and phosphorus, so as to effectively prevent water eutrophication, a water inlet pump 2 pumps the sewage to be treated to reach a sedimentation tank 5 through a water conveying pipe 3, a fiber membrane 22 is installed inside the sedimentation tank 5, a heater 6 is installed above a photocatalyst 21 and close to the inner wall of the sedimentation tank 5, and an aeration pump 19 is installed below the photocatalyst 21 and at the bottom end of the sedimentation tank 5, the photocatalyst 21 in the sedimentation tank 5 reacts with sewage in the sedimentation tank 5 under the action of the aeration pump 19 and the irradiation of the light source 9, the sewage is filtered by the fiber membrane 22, secondly, the sewage passes through the sedimentation tank 5 to pretreat insoluble matters such as sludge contained in the sewage, the sewage after removing impurities such as sludge enters the heater 6 to heat the sewage, the sewage after being heated flows through the water inlet pipe 7 under the action of the pumping of the booster pump 17 to enter the inside of the filter tank 16, the rotating disc 15 is arranged at the bottom end position in the inside of the filter tank 16, the rotating shaft 10 is arranged above the rotating disc 15, the stirring rods 14 are arranged at the left side and the right side of the rotating shaft 10, the filter screen 11 is arranged in the inside of the filter tank 16, the separation layer 13 is arranged below the filter screen 11, the ultraviolet disinfection lamps 12 are arranged above the filter screen 11, and finally, the number of, and the ultraviolet disinfection lamps 12 are symmetrically distributed on both sides of the inner wall of the filtering tank 16, can disinfect and sterilize the sewage, improves the purification efficiency, the sewage enters the membrane biological purification box through the separation layer 13 after being further filtered by the filter screen 11 to carry out the final purification effect on the sewage, the stirring rods 14 are arranged, the number of the stirring rods 14 is 8, and the stirring rods 14 are distributed on the left side and the right side of the rotating shaft 10, so that the stirring is convenient, the sewage purification quality is improved, the resources are saved, the environment is protected, the chemical reaction generated by the catalyst is utilized, the effluent quality is high, can carry out the preliminary treatment to sewage, the stirring rod 14, ultraviolet ray disinfection lamp 12 and the filter screen 11 of setting effectively improve the purification efficiency to sewage, make purifying effect show, have that the treatment effect is good, the treatment effeciency is high, shock resistance load capacity is strong, the operation is stable, investment working costs is low, the management is convenient, characteristics such as pleasing to the eye practicality.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a lime tailing sewage treatment plant, including lime dissolving tank (1), intake pump (2), raceway (3), sewage inlet (4), sedimentation tank (5), heater (6), inlet tube (7), water inlet (8), light source (9), axis of rotation (10), filter screen (11), ultraviolet ray disinfection lamp (12), separate layer (13), stirring rod (14), rolling disc (15), filtering ponds (16), booster pump (17), delivery port (18), aeration pump (19), cobblestone filler (20), photocatalyst (21), fibre membrane (22), entry (23), quartzy fine sand layer (24), zeolite limestone filler (25) and residue discharge port (26), its characterized in that: an inlet (23) is arranged above one side of the lime dissolving tank (1), a quartz fine sand layer (24) is arranged below the inlet (23) and inside the lime dissolving tank (1), a zeolite limestone filler (25) is arranged below the quartz fine sand layer (24), a cobblestone filler (20) is filled below the zeolite limestone filler (25), a water inlet pump (2) is arranged below one side of the lime dissolving tank (1), a water delivery pipe (3) is connected above the water inlet pump (2), one end of the water delivery pipe (3) is connected with a sewage inlet (4), a fiber membrane (22) is arranged inside the settling tank (5), a photocatalyst (21) is arranged outside the fiber membrane (22), and a heater (6) is arranged above the photocatalyst (21) and close to the inner wall of the settling tank (5), and the lower part of the photocatalyst (21) is positioned at the bottom end of the sedimentation tank (5) and is provided with an aeration pump (19), the outer part of the sedimentation tank (5) is positioned at two sides and is provided with a light source (9), the bottom end of the sedimentation tank (5) is positioned at the right side and is provided with a booster pump (17) through a water outlet (18), the right side of the booster pump (17) is provided with a water inlet pipe (7), the right side of the water inlet pipe (7) is connected with a water inlet (8), the water inlet pipe (7) is connected with a filtering tank (16) through the water inlet (8), the inner part of the filtering tank (16) is positioned at the bottom end and is provided with a rotating disc (15), a rotating shaft (10) is arranged above the rotating disc (15), stirring rods (14) are arranged at the left side and the right side of the rotating shaft (10), a filtering screen (11) is arranged in, and an ultraviolet disinfection lamp (12) is arranged above the filter screen (11), and a residue discharge port (26) is arranged at the position of the bottom end of the filter tank (16) close to one side.
2. The limestone tailing sewage treatment plant according to claim 1, characterized in that: the number of the ultraviolet disinfection lamps (12) is two, and the ultraviolet disinfection lamps (12) are symmetrically distributed on two sides of the inner wall of the filter tank (16).
3. the limestone tailing sewage treatment plant according to claim 1, characterized in that: the sedimentation tank (5) is of a cylindrical structure, a sediment treatment tank is arranged at the bottom end of the sedimentation tank (5), and the sedimentation tank (5) is made of toughened glass.
4. The limestone tailing sewage treatment plant according to claim 1, characterized in that: the number of the stirring rods (14) is 8, and the stirring rods (14) are distributed on the left side and the right side of the rotating shaft (10).
5. The limestone tailing sewage treatment plant according to claim 1, characterized in that: and green plants are planted outside the quartz fine sand layer (24).
6. The limestone tailing sewage treatment plant according to claim 1, characterized in that: and a PH analyzer and a flowmeter are arranged in the filtering tank (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822203627.3U CN209778573U (en) | 2018-12-26 | 2018-12-26 | Limestone tailing sewage treatment plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822203627.3U CN209778573U (en) | 2018-12-26 | 2018-12-26 | Limestone tailing sewage treatment plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209778573U true CN209778573U (en) | 2019-12-13 |
Family
ID=68790785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822203627.3U Expired - Fee Related CN209778573U (en) | 2018-12-26 | 2018-12-26 | Limestone tailing sewage treatment plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209778573U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925045A (en) * | 2020-09-15 | 2020-11-13 | 潍坊宏图环保设备有限公司 | Sewage treatment tank |
-
2018
- 2018-12-26 CN CN201822203627.3U patent/CN209778573U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111925045A (en) * | 2020-09-15 | 2020-11-13 | 潍坊宏图环保设备有限公司 | Sewage treatment tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191213 |