CN117085411A - Self-suspension negative pressure suction type floater separation and removal device - Google Patents
Self-suspension negative pressure suction type floater separation and removal device Download PDFInfo
- Publication number
- CN117085411A CN117085411A CN202310794314.2A CN202310794314A CN117085411A CN 117085411 A CN117085411 A CN 117085411A CN 202310794314 A CN202310794314 A CN 202310794314A CN 117085411 A CN117085411 A CN 117085411A
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- Prior art keywords
- water
- filter cartridge
- fixedly connected
- outer end
- negative pressure
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- Pending
Links
- 238000000926 separation method Methods 0.000 title claims abstract description 19
- 239000000725 suspension Substances 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 134
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 12
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 12
- 241001330002 Bambuseae Species 0.000 claims abstract description 12
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 12
- 239000011425 bamboo Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 8
- 238000002637 fluid replacement therapy Methods 0.000 claims 2
- 239000007769 metal material Substances 0.000 claims 1
- 238000004062 sedimentation Methods 0.000 abstract description 21
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 abstract description 2
- 230000013575 regulation of buoyancy Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000001502 supplementing effect Effects 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
- B01D36/045—Combination of filters with centrifugal separation devices
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses a self-suspension negative pressure suction type floater separating and cleaning device, which comprises a filter cylinder, wherein the symmetrical outer end of the filter cylinder is fixedly connected with drain pipes, the other end of each drain pipe is fixedly connected with a closed water tank, a pneumatic pipe is fixedly connected between one group of drain pipes and the closed water tank, and a water storage buoyancy adjusting cavity is formed in the filter cylinder; this from suspension negative pressure suction formula floater separation clearing device adjusts the inside air content of cavity through controlling the volume of retaining buoyancy regulation intracavity portion water, utilizes atmospheric pressure principle for filter cartridge can automatically regulated be located the suspension height on the surface of water, make things convenient for the floater on the surface of water to enter into and strain a section of thick bamboo china, through the separation net of aperture and the centrifugal force that impeller rotation produced, make filter cartridge continuously carry out automatic filtration and impurity separation to the surface of water floater in the sedimentation tank, need not artifical salvage dross, the cleaning efficiency is high, water body treatment cost is low, the treatment security of water is higher.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a self-suspension negative pressure suction type floater separating and removing device.
Background
Domestic water is an indispensable resource for human survival. In order to meet the water demand of people, the water in the nature needs to be purified and then can be used after reaching the sanitary standard of domestic water. After water in the nature enters a grid sedimentation tank of a water plant, a purifying medicine needs to be added into the grid sedimentation tank, and after the medicine is added into the water, a large amount of tiny particles in the water can be gathered and float on the water surface, so that the floating matters gathered on the water surface need to be removed from the grid sedimentation tank.
The existing treatment method for removing the floating matters on the water surface of the grid sedimentation tank of the water plant mainly depends on that a worker drags out the floating matters on the side of the water tank by using a net with fine meshes, however, the depth of the grid sedimentation tank is deeper, and the worker has the risk of falling into the grid sedimentation tank to drown in the process of dragging out the floating matters; and the efficiency of the workers to scoop up the floating matters on the water surface by using the dip net is lower.
Therefore, the invention provides a self-suspension negative pressure suction type floater separating and removing device, which sucks and filters water in a sedimentation tank through a filter cylinder to solve the problems.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a self-suspension negative pressure suction type floater separating and removing device, which solves the problems.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a from suspension negative pressure suction formula floater separation clearing device, includes the section of thick bamboo, the symmetry outer end fixedly connected with drain pipe of section of thick bamboo, the other end fixedly connected with airtight water tank of drain pipe, a set of the drain pipe with fixedly connected with pneumatic tube between the airtight water tank, the inside of section of thick bamboo has been seted up retaining buoyancy and has been adjusted the chamber, the drain pipe with retaining buoyancy is adjusted the chamber and is switched on, the inside of section of thick bamboo is fixedly connected with funnel and lower funnel respectively, lower funnel with set up the filter chamber between the section of thick bamboo.
Preferably, the two groups of drain pipes are crisscross to be arranged at the outer end of the filter cylinder, a centrifugal machine is fixedly connected to the inner part of the lower funnel, an impeller is movably connected to the outer end of the centrifugal machine, the impeller is arranged at the outer end of the lower funnel, and a blocking net is fixedly connected to the outer end of the lower funnel.
Preferably, a scum cavity is formed in the bottom of the filter cylinder, the filter cavity is communicated with the scum cavity, and a drain pipe is fixedly connected to the bottom end of the filter cylinder.
Preferably, the outer end of the filter cylinder is provided with four water draining holes, the outer end of the drain pipe is connected with a water valve in a threaded manner, and the outer end of the air pressure pipe is connected with an air valve in a threaded manner.
Preferably, the top of the closed water tank is symmetrically and fixedly connected with a liquid supplementing pipe, the top of the liquid supplementing pipe is sleeved with a sealing cover, one side of the filter cylinder is provided with an overflow hole, the overflow hole is communicated with the water storage buoyancy adjusting cavity, and the inner thread of the overflow hole is connected with a sealing bolt.
Preferably, the outer end of the drain pipe is sleeved with a weight plate, the weight plate is made of metal, and the outer end of the drain pipe is in threaded connection with a fixing bolt.
Preferably, the top end of the filter cylinder is fixedly connected with a grid ring, the top end of the grid ring is provided with convex columns, and a plurality of convex columns are arranged at equal intervals.
Advantageous effects
The invention provides a self-suspension negative pressure suction type floater separating and removing device. Compared with the prior art, the method has the following beneficial effects:
(1) This from suspension negative pressure suction formula floater separation clearing device adjusts the air content in the cavity through controlling the volume of retaining buoyancy adjustment intracavity portion water, utilizes atmospheric pressure principle for the section of thick bamboo can automatically regulated be located the suspension height on the surface of water, makes things convenient for the floater on the surface of water to enter into a section of thick bamboo china, through the separation net of aperture and the centrifugal force that impeller rotation produced, makes the section of thick bamboo last to carry out automatic filtration and impurity separation to the surface of water floater in the sedimentation tank, need not artifical salvage dross, and cleaning efficiency is high, and water body treatment cost is low, and the treatment security of water is higher.
(2) This from suspension negative pressure suction formula floater separation clearing device filters water and dross through the separation net for the dross filters to the filter chamber of straining the inside of section of thick bamboo in, and in the dross chamber of discharging, installs hose and slush pump in the bottom of blow off pipe, makes the floater discharge, and water still remains in the sedimentation tank, reduces the discharge of water.
Drawings
FIG. 1 is a perspective view of the external structure of the present invention;
FIG. 2 is a cross-sectional view of a filter cartridge of the present invention;
FIG. 3 is a schematic view of the internal structure of the filter cartridge of the present invention;
FIG. 4 is a left side view of the present invention;
FIG. 5 is a front view of the present invention;
fig. 6 is a top view of the present invention.
1, a filter cartridge; 2. a drain pipe; 3. a closed water tank; 4. an air pressure pipe; 5. a water storage buoyancy adjusting cavity; 6. an upper funnel; 7. a lower funnel; 8. a centrifuge; 9. an impeller; 10. a filter chamber; 11. a dross chamber; 12. a water discharge hole; 13. a water valve; 14. an air valve; 15. a fluid supplementing pipe; 16. a sealing bolt; 17. a blow-down pipe; 18. a weight plate; 19. a grid ring; 20. and (5) fixing bolts.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
referring to fig. 1-3, a self-suspension negative pressure suction type floater separating and removing device comprises a filter cartridge 1, wherein the symmetrical outer end of the filter cartridge 1 is fixedly connected with a drain pipe 2, the other end of the drain pipe 2 is fixedly connected with a closed water tank 3, a group of drain pipes 2 and the closed water tank 3 are fixedly connected with a pneumatic tube 4, the outer end of the filter cartridge 1 is provided with a drain hole 12, the drain holes 12 are provided with four, the outer end of the drain pipe 2 is in threaded connection with a water valve 13, the outer end of the pneumatic tube 4 is in threaded connection with a pneumatic valve 14, before the filter cartridge 1 is put into a sedimentation tank, the water valve 13 and the pneumatic valve 14 are closed, water is poured into the closed water tank 3 until the closed water tank 3 is filled with water, buoyancy of the filter cartridge 1 is measured, and the corresponding number of weight pieces 18 are prevented according to the measured buoyancy, after the filter cartridge 1 is suspended in the sedimentation tank, water in the closed water tank 3 enters a water storage buoyancy adjusting cavity 5 from the drain pipe, the volume of the water entering the buoyancy adjusting cavity 5 is increased, the volume of the water in the water storage adjusting cavity is reduced, the water content of the water is just lowered, and the water storage cavity 1 just flows into contact with the bottom of the pneumatic tube 19 of the filter cartridge until the filter cartridge 1 just contacts with the water surface, and the water storage ring 19 just above the water surface, thereby the water level can not contact with the water surface of the floater is prevented;
the inside of the filter cylinder 1 is provided with a water storage buoyancy adjusting cavity 5, the drain pipe 2 is communicated with the water storage buoyancy adjusting cavity 5, the inside of the filter cylinder 1 is fixedly connected with an upper funnel 6 and a lower funnel 7 respectively, a filter cavity 10 is arranged between the lower funnel 7 and the filter cylinder 1, after water and scum enter the filter cylinder 1, the water is discharged from the upper funnel 6 and the lower funnel 7, and the upper funnel 6 and the lower funnel 7 which are in a truncated cone shape are convenient to be discharged in a concentrated manner, so that the stability of the filter cylinder 1 during working is enhanced;
the two groups of drain pipes 2 are arranged at the outer end of the filter cylinder 1 in a cross shape, a centrifugal machine 8 is fixedly connected to the inside of the lower funnel 7, an impeller 9 is movably connected to the outer end of the centrifugal machine 8, the impeller 9 is arranged at the outer end of the lower funnel 7, a blocking net is fixedly connected to the outer end of the lower funnel 7, when water passes through the lower funnel 7, because the aperture of the blocking net is smaller, water can pass through, scum stays at the outer end of the lower funnel 7, the centrifugal machine 8 drives the impeller 9 to rotate at the moment, and the scum is discharged into a filter cavity 10 by centrifugal force generated by the impeller 9;
the bottom of the filter cartridge 1 is provided with a scum cavity 11, the filter cavity 10 is communicated with the scum cavity 11, the bottom end of the filter cartridge 1 is fixedly connected with a drain pipe 17, scum and sediment entering the filter cavity 10 enter the scum cavity 11 at the bottom of the filter cartridge 1 again and are discharged from the drain pipe 17, a hose is sleeved at the bottom end of the drain pipe 17 before the filter cartridge 1 is put into a sedimentation tank, a slurry pump is installed at the other end of the hose again, the scum pump pumps out scum, filtered water is discharged from the drain holes 12, the pumping capacity of a water body is reduced, so that the effect of saving water is achieved, four groups of drain holes 12 are arranged at the same time, and when the filtered water and the scum are filtered, the scum are respectively discharged from the four groups of drain holes 12, so that the stability of the filter cartridge 1 in the water body is maintained, the water leakage of the filter cartridge 1 is prevented from shaking in the water body, the inclination angle of the filter cartridge 1 is prevented from being too large, the large-volume floating matters enter the filter cartridge 1, and the filter cartridge 1 is prevented from bouncing in the water body, and the filter effect of the water in the sedimentation tank is also prevented.
Embodiment two:
referring to fig. 1-6, the present embodiment provides a technical solution for a self-suspension negative pressure suction type floating object separating and removing device based on the first embodiment: the top end of the closed water tank 3 is symmetrically and fixedly connected with a liquid supplementing pipe 15, the top end of the liquid supplementing pipe 15 is sleeved with a sealing cover, one side of the filter cartridge 1 is provided with an overflow hole, the overflow hole is communicated with the water storage buoyancy adjusting cavity 5, the inner thread of the overflow hole is connected with a sealing bolt 16, the liquid supplementing pipe 15 is used for filling water into the closed water tank 3, when the filter cartridge 1 is taken out and scum in the water storage buoyancy adjusting cavity 5 is cleaned, the sealing bolt 16 is opened, so that the water in the water storage buoyancy adjusting cavity 5 is discharged, the filter cartridge 1 is turned over again to pour out scum, and the scum in the filter cartridge 1 is cleaned simply and conveniently;
the outer end of the drain pipe 17 is sleeved with the weight pieces 18, the weight pieces 18 are made of metal, the outer end of the drain pipe 17 is in threaded connection with the fixing bolts 20, and because the filter cylinder 1 is of a hollow structure, the buoyancy born by the filter cylinder 1 is large, before the filter cylinder 1 is placed, the outer end of the drain pipe 17 is sleeved with a plurality of groups of weight pieces 18, the number of the weight pieces 18 can be adjusted according to the buoyancy of the filter cylinder 1 and water, the adjustment mode is simple and convenient, the weight pieces 18 can be fixed by the fixing bolts 20, the weight pieces 18 are prevented from falling, and therefore the bottom of the filter cylinder 1 is conveniently sunk into the water body in the sedimentation tank;
the top fixedly connected with grid ring 19 of straining a 1, the top of grid ring 19 is equipped with the projection, and a plurality of projections equidistance are arranged, and the outside multiunit projection of grid ring 19 can block bulky floater, places bulky debris or floater and enters into and lead to its jam in straining a 1, influences its filter effect to water.
And all that is not described in detail in this specification is well known to those skilled in the art.
When the water body in the sedimentation tank is treated, firstly, the water valve 13 and the air valve 14 are closed, water is poured into the sealed water tank 3 until the sealed water tank 3 is filled, the buoyancy of the filter cartridge 1 on the water surface is measured, a corresponding number of weight plates 18 are prevented according to the measured buoyancy, the filter cartridge 1 is put into the sedimentation tank, after the filter cartridge 1 is suspended in the sedimentation tank, the water valve 13 and the air valve 14 are opened, the water in the sealed water tank 3 enters the water storage buoyancy adjusting cavity 5 from the water drain pipe, the air content in the sealed water tank 3 is reduced as the volume of the water entering the water storage buoyancy adjusting cavity 5 is increased, the filter cartridge 1 is submerged until the bottom of the air pressure pipe 4 is in contact with the water surface, the air cannot circulate, so that the grid ring 19 is just in contact with the water surface, at the moment, the floating matters on the water surface enter the filter cartridge 1, and after the water and the scum enter the filter cartridge 1, the water is discharged from the upper funnel 6 and the lower funnel 7, the upper funnel 6 and the lower funnel 7 which are in the shape of a truncated cone are convenient to discharge and discharge in a concentrated manner, the stability of the filter cartridge 1 during operation is enhanced, when water passes through the lower funnel 7, because the aperture of the blocking net is smaller, water can pass through, scum stays at the outer end of the lower funnel 7, at the moment, the centrifugal machine 8 drives the impeller 9 to rotate, the scum is discharged into the filter cavity 10 by the centrifugal force generated by the impeller 9, the filter cartridge 1 is put into the sedimentation tank, a hose is sleeved at the bottom end of the drain pipe 17, a mud pump is mounted at the other end of the hose, the scum is pumped out by the mud pump, filtered water is discharged from the drain holes 12, the pumping quantity of the water body is reduced, thus the water saving effect is achieved, four groups of drain holes 12 are arranged simultaneously, when the water and the scum are filtered, the scum are discharged from the four groups of drain holes 12 respectively, thus the stability of the filter cartridge 1 suspended in the water body is maintained, and the water body is prevented from shaking due to uneven water discharging of the filter cartridge 1, therefore, the inclination angle of the filter cartridge 1 is prevented from being too large, the filter cartridge 1 is prevented from bouncing in a water body when filtering, the filtering effect of water in a sedimentation tank is affected, the liquid supplementing pipe 15 is used for filling water into the closed water tank 3, when the filter cartridge 1 is taken out and scum in the filter cartridge 1 is cleaned, the sealing bolt 16 is opened, water in the water storage buoyancy regulating cavity 5 is discharged, the filter cartridge 1 is turned over again to pour the scum out, scum in the filter cartridge 1 is cleaned simply and conveniently, because the filter cartridge 1 is of a hollow structure, the filter cartridge 1 is subjected to larger buoyancy, the number of the weight pieces 18 can be adjusted according to the buoyancy of the filter cartridge 1 and the water, the adjusting mode is simple and convenient, the fixing bolt 20 can fix the weight pieces 18, the bottom of the filter cartridge 1 is convenient to sink into the water body in the sedimentation tank, a plurality of groups of protruding columns outside the grid ring 19 can block the large-volume floating matters, and the filter cartridge 1 is placed to be blocked by the large-volume scum or the floating matters enter the filter cartridge 1, and the filter effect of the filter cartridge is affected by the water.
It is noted that relational terms such as first and second, and the like are 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. Moreover, 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.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a from suspension negative pressure suction formula floater separation clearing device, includes filter cartridge (1), its characterized in that: the utility model discloses a filter cartridge, including filter cartridge (1), sealed water tank (3), filter cartridge (1) and lower funnel (7), filter cartridge (1) are equipped with filter chamber (10) between the inside of filter cartridge (1), filter cartridge (1) symmetry outer end fixedly connected with drain pipe (2), the other end fixedly connected with sealed water tank (3) of drain pipe (2), a set of drain pipe (2) with fixedly connected with pneumatic tube (4) between sealed water tank (3), filter cartridge (1) is equipped with retaining buoyancy adjustment chamber (5), drain pipe (2) with retaining buoyancy adjustment chamber (5) are linked together, filter cartridge (1) is equipped with upper funnel (6) and lower funnel (7) in inside respectively.
2. A self-suspending negative pressure suction type float separation and removal device as claimed in claim 1, wherein: two sets of drain pipes (2) are crisscross to be located the outer end of straining a section of thick bamboo (1), the inside fixedly connected with centrifuge (8) of lower funnel (7), the outer end swing joint of centrifuge (8) has impeller (9), impeller (9) are located the outer end of lower funnel (7), the outer end fixedly connected with separation net of lower funnel (7).
3. A self-suspending negative pressure suction type float separation and removal device as claimed in claim 1, wherein: the bottom of the filter cartridge (1) is provided with a scum cavity (11), the filter cavity (10) is communicated with the scum cavity (11), and the bottom end of the filter cartridge (1) is fixedly connected with a drain pipe (17).
4. A self-suspending negative pressure suction type float separation and removal device as claimed in claim 1, wherein: the outer end of the filter cylinder (1) is provided with water drain holes (12), the number of the water drain holes (12) is four, the outer end of the drain pipe (2) is in threaded connection with a water valve (13), and the outer end of the air pressure pipe (4) is in threaded connection with an air valve (14).
5. A self-suspending negative pressure suction type float separation and removal device as claimed in claim 1, wherein: the top of airtight water tank (3) symmetry fixedly connected with fluid replacement pipe (15), the top cover of fluid replacement pipe (15) is equipped with sealed lid, the overflow hole has been seted up to one side of straining a section of thick bamboo (1), the overflow hole with retaining buoyancy adjusts chamber (5) and switches on mutually, and the inside threaded connection of overflow hole has sealing bolt (16).
6. A self-suspending negative pressure suction type float separation and removal device as claimed in claim 3, wherein: the outer end cover of blow off pipe (17) is equipped with counter weight piece (18), counter weight piece (18) are the metal material, the outer end threaded connection of blow off pipe (17) has fixing bolt (20).
7. A self-suspending negative pressure suction type float separation and removal device as claimed in claim 1, wherein: the top end of the filter cylinder (1) is fixedly connected with a grid ring (19), the top end of the grid ring (19) is provided with convex columns, and a plurality of convex columns are arranged at equal intervals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310794314.2A CN117085411A (en) | 2023-06-30 | 2023-06-30 | Self-suspension negative pressure suction type floater separation and removal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310794314.2A CN117085411A (en) | 2023-06-30 | 2023-06-30 | Self-suspension negative pressure suction type floater separation and removal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117085411A true CN117085411A (en) | 2023-11-21 |
Family
ID=88774215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310794314.2A Pending CN117085411A (en) | 2023-06-30 | 2023-06-30 | Self-suspension negative pressure suction type floater separation and removal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117085411A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117552835A (en) * | 2024-01-12 | 2024-02-13 | 河南永华能源有限公司 | Colliery geological engineering prevention and cure water management and control treatment facility |
-
2023
- 2023-06-30 CN CN202310794314.2A patent/CN117085411A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117552835A (en) * | 2024-01-12 | 2024-02-13 | 河南永华能源有限公司 | Colliery geological engineering prevention and cure water management and control treatment facility |
| CN117552835B (en) * | 2024-01-12 | 2024-03-22 | 河南永华能源有限公司 | Colliery geological engineering prevention and cure water management and control treatment facility |
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