CN212818591U - Sewage purification device - Google Patents

Sewage purification device Download PDF

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Publication number
CN212818591U
CN212818591U CN202021549786.XU CN202021549786U CN212818591U CN 212818591 U CN212818591 U CN 212818591U CN 202021549786 U CN202021549786 U CN 202021549786U CN 212818591 U CN212818591 U CN 212818591U
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CN
China
Prior art keywords
roller
filter screen
rose box
dwang
box
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.)
Active
Application number
CN202021549786.XU
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Chinese (zh)
Inventor
陈去疾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qufu Chunqiu Machinery Equipment Co ltd
Original Assignee
Suzhou Waerni Intelligent Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzhou Waerni Intelligent Technology Co ltd filed Critical Suzhou Waerni Intelligent Technology Co ltd
Priority to CN202021549786.XU priority Critical patent/CN212818591U/en
Application granted granted Critical
Publication of CN212818591U publication Critical patent/CN212818591U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • C02F1/004Processes for the treatment of water whereby the filtration technique is of importance using large scale industrial sized filters
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D39/00Filtering material for liquid or gaseous fluids
    • B01D39/10Filter screens essentially made of metal
    • B01D39/12Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/14Maintenance of water treatment installations

Abstract

The utility model discloses a sewage purification device, including rose box, water inlet, outlet, clean case, first filtering component, second filtering component and clean mechanism, the water inlet is seted up in the rose box upper end, the outlet is located rose box bottom one side, clean case be located rose box one side and with the inside intercommunication of rose box, first filtering component includes filter screen roller, first roller and driving motor, the filter screen roller is located the inside top of rose box. The utility model discloses a set up first filtering component and second filtering component, can utilize first filtering component to carry out the coarse filtration, utilize the second filtering component to carry out the fine filtration, guarantee that the filter effect is good, and through setting up clean mechanism, can utilize clean mechanism to clean the filter screen roller surface on the first filtering component, can avoid the filter screen roller to be blockked up the phenomenon, can carry out continuous filtration work, the use of being convenient for.

Description

Sewage purification device
Technical Field
The utility model relates to a sewage treatment technical field specifically is a sewage purification device.
Background
As is well known, with the rapid development of economy in China, the problem of environmental pollution is more and more serious, and the harm of sewage to the environment is particularly serious, so that sewage needs to be treated by a sewage purification device, wherein sewage purification refers to the treatment of sewage by physical, chemical and biological methods, so that the sewage is purified, the pollution is reduced, the recovery and reuse of the sewage are achieved, and water resources are fully utilized.
Current sewage purification installation is when filtering sewage, because contains a large amount of impurity in the sewage, in the filtering process, impurity can block up filtering mechanism, and current filtering mechanism does not possess self-cleaning function, leads to need to stop filtering work and dismantles the clearance for can not carry out continuous filtering work, influence sewage treatment's filtration efficiency, need improve.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sewage purification device to solve the current sewage purification device who mentions in the above-mentioned background art when filtering sewage, because contain a large amount of impurity in the sewage, in the filtering process, impurity can block up filtering mechanism, and current filtering mechanism does not possess self-cleaning function, leads to needing to stop filtering work and dismantles the clearance, makes can not carry out continuous filtering work, influences sewage treatment's filtration efficiency's problem.
In order to achieve the above object, the utility model provides a following technical scheme: a sewage purification device comprises a filter box, a water inlet, a water outlet, a cleaning box, a first filter assembly, a second filter assembly and a cleaning mechanism, wherein the water inlet is arranged at the upper end of the filter box, the water outlet is positioned at one side of the bottom end of the filter box, the cleaning box is positioned at one side of the filter box and is communicated with the inside of the filter box, the first filter assembly comprises a filter screen roller, a first roller shaft and a driving motor, the filter screen roller is positioned at the top end of the inside of the filter box, the first roller shaft penetrates through the filter screen roller and is fixedly connected with the filter screen roller, one end of the first roller shaft is rotatably connected with the inner wall at one side of the filter box, the other end of the first roller shaft extends to the outside of the filter box and is fixedly connected with the output end of the driving motor, the driving motor is fixedly arranged on one side wall of the filter box through a mounting plate, the second filter assembly is, and the cleaning mechanism is positioned at one side of the first filtering component.
Preferably, the cleaning mechanism comprises a second roller shaft and a brush roller, one end of the second roller shaft is rotatably connected with the inner wall of one side of the cleaning box, the other end of the second roller shaft extends to the outside of the cleaning box and is connected with a transmission belt through a belt pulley, one end of the transmission belt is connected with the first roller shaft through the belt pulley, the brush roller is fixedly sleeved on the second roller shaft, and the brush roller is in surface contact with one side of the filter screen roller.
Preferably, first trash discharging port has been seted up to clean incasement portion bottom, and clean incasement portion bottom one side fixed mounting has a cleaning frame, be equipped with the clean tooth of brush on the cleaning frame, the brush cleans teeth and brush roller surface contact.
Preferably, clean frame one side is equipped with the guide plate, the guide plate adopts hollow out construction, the guide plate is the slope setting, guide plate one end and the inside bottom fixed connection of clean case, and the guide plate other end extends to filter screen roller below one side.
Preferably, filter screen roller below is equipped with inverted circular truncated cone type water guide cylinder, the delivery port has been seted up to inverted circular truncated cone type water guide cylinder bottom, the inside fixed rotating shaft that is equipped with of rose box, the fixed rotating shaft bottom is rotated with the inside bottom of rose box and is connected, the fixed rotating shaft top is connected with the blade, the blade is located the delivery port under.
Preferably, the second filtering component comprises a fine filtering net, the fine filtering net is made of soft materials, and the middle part of the fine filtering net is movably sleeved on the fixed rotating shaft through a connecting sleeve.
Preferably, fine filter screen below both sides are equipped with first dwang, second dwang respectively, first dwang, second dwang are located fixed rotating shaft both sides respectively and rotate with the rose box and are connected, all be equipped with the cam on first dwang, the second dwang, surface contact under cam and the fine filter screen.
Preferably, fixed rotating shaft is last to install fixed frame, first dwang, second dwang one end all extend to fixed frame in and with fixed frame rotation be connected.
Preferably, a driving bevel gear is fixedly mounted on the fixed rotating shaft, driven bevel gears are meshed with the two sides of the driving bevel gear and are fixedly connected with one ends of the first rotating rod and the second rotating rod respectively, and the driving bevel gear and the driven bevel gears are located inside the fixed frame.
Preferably, a second impurity discharging port is formed in the side wall of the filtering box and located on one side of the fine filtering net, a collecting tank is arranged on one side of the second impurity discharging port, and the collecting tank is annularly arranged on the outer wall of the filtering box.
The method has the following beneficial effects:
(1) the utility model discloses a set up first filtering component, and be equipped with clean mechanism in first filtering component one side, during the filtration, can utilize the filter screen roller to rotate, make the sewage that falls on the filter screen roller fall through the through-hole on the filter screen roller, large granule impurity adhesion in the sewage is on the filter screen roller simultaneously, the brush roller that drives on the clean mechanism through driving belt when the filter screen roller rotates, utilize the brush roller to rotate and clear away the impurity of adhesion on the filter screen roller, can avoid the filter screen roller to be blockked up the phenomenon, can carry out continuous filtering work, and convenient to use.
(2) The utility model discloses a set up second filter assembly, and be equipped with first dwang and second dwang respectively in second filter assembly below both sides, when sewage after the primary filtration falls on second filter assembly, the tiny particle impurity in the sewage can further be filtered to the thin filter screen, and in the time of first dwang pivoted, can utilize the cam with thin filter screen jack-up, make thin filter screen take place the slope, thereby with the impurity gliding of thin filter screen along the slope of slope and through the miscellaneous mouthful discharge of second row, can in time clean second filter assembly, guarantee that the filter effect is good, and convenient to use.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the interior of the utility model;
fig. 3 is a top view of the present invention;
fig. 4 is a schematic structural view of a portion a in fig. 1 according to the present invention;
fig. 5 is a schematic structural view of the cleaning frame of the present invention.
In the figure: 1. a filter box; 2. a water inlet; 3. a water outlet; 4. a screen roll; 5. a first roller shaft; 6. a drive motor; 7. a water guide cylinder with an inverted circular truncated cone shape; 8. a water outlet; 9. a blade; 10. fixing the rotating shaft; 11. a first rotating lever; 12. a second roller shaft; 13. a brush roller; 14. a first trash discharge port; 15. a cleaning frame; 16. a baffle; 17. cleaning teeth with a brush; 18. a drive belt; 19. a cleaning tank; 20. collecting tank; 21. a second impurity discharging port; 22. a drive bevel gear; 23. a fixing frame; 24. a second rotating lever; 25. a driven bevel gear; 26. a cam; 27. a fine filter screen.
Detailed Description
As shown in fig. 1-5, the utility model provides a technical solution: a sewage purification device comprises a filter box 1, a water inlet 2, a water outlet 3, a cleaning box 19, a first filter component, a second filter component and a cleaning mechanism, wherein the water inlet 2 is arranged at the upper end of the filter box 1, the water outlet 3 is arranged at one side of the bottom end of the filter box 1, the cleaning box 19 is arranged at one side of the filter box 1 and is communicated with the inside of the filter box 1, the first filter component comprises a filter screen roller 4, a first roller shaft 5 and a driving motor 6, the filter screen roller 4 is arranged at the top end of the inside of the filter box 1, the first roller shaft 5 penetrates through the filter screen roller 4 and is fixedly connected with the filter screen roller 4, one end of the first roller shaft 5 is rotatably connected with the inner wall at one side of the filter box 1, the other end of the first roller shaft 5 extends to the outside of the filter box 1 and is fixedly connected with the output end of the driving motor 6, the driving motor 6 is fixedly, the second filter assembly is located below the first filter assembly, the cleaning mechanism is located inside the cleaning tank 19, and the cleaning mechanism is located on one side of the first filter assembly.
The cleaning mechanism comprises a second roller shaft 12 and a brush roller 13, one end of the second roller shaft 12 is rotatably connected with the inner wall of one side of a cleaning box 19, the other end of the second roller shaft 12 extends to the outside of the cleaning box 19 and is connected with a transmission belt 18 through a belt pulley, one end of the transmission belt 18 is connected with a first roller shaft 5 through a belt pulley, the brush roller 13 is fixedly sleeved on the second roller shaft 12, the brush roller 13 is in surface contact with one side of a filter screen roller 4, the filter screen roller 4 can be used for rotating, so that sewage passing through the filter screen roller 4 falls into a filter box 1 through a hole on the filter screen roller 4, meanwhile, large-particle impurities in the sewage fall onto the filter screen roller 4, the brush roller 13 synchronously rotates while the filter screen roller 4 rotates, and the brush roller 13 is in surface contact with the filter screen roller 4, so that the impurities on the surface of the filter screen roller 4 can be brushed into the cleaning box 19, the filter screen roller 4 is cleaned, so that the surface of the filter screen roller 4 is prevented from being blocked, and continuous filtration is ensured.
First row of miscellaneous mouthful 14 has been seted up to cleaning box 19 bottom, and 19 inside bottom one side fixed mounting of cleaning box have cleaning frame 15, be equipped with the clean tooth 17 of brush on the cleaning frame 15, the brush is cleaned 17 and brush roller 13 surface contact, can be through opening first row of miscellaneous mouthful 14, with the impurity discharge in the cleaning box 19, the brush is cleaned 17 simultaneously and can be cleared up the brush on the brush roller 13, avoids adhesion impurity influence cleaning performance on the brush.
Clean 15 one side of putting up is equipped with guide plate 16, guide plate 16 adopts hollow out construction, guide plate 16 is the slope setting, the inside bottom fixed connection of guide plate 16 one end and clean case 19, and the guide plate 16 other end extends to filter screen roller 4 below one side, can utilize guide plate 16 with filter screen roller 4 by the impurity water conservancy diversion that drops after the brush roller 13 clearance to clean case 19 in, and adopt the fretwork setting, can avoid sewage to enter into clean case 19.
4 below of filter screen roller are equipped with radius platform type water guide cylinder 7, delivery port 8 has been seted up to radius platform type water guide cylinder 7 bottom, 1 inside fixed rotating shaft 10 that is equipped with of rose box, fixed rotating shaft 10 bottom is rotated with 1 inside bottom of rose box and is connected, 10 tops of fixed rotating shaft are connected with blade 9, blade 9 is located delivery port 8 under, can utilize radius platform type water guide cylinder 7 to collect the sewage that first filtration fell and discharge through delivery port 8 is unified, makes sewage towards blade 9, thereby makes blade 9 rotate and drive fixed rotating shaft 10 and rotate.
The second filtering component comprises a fine filtering net 27, the fine filtering net 27 is made of soft materials, the middle of the fine filtering net 27 is sleeved on the fixed rotating shaft 10 through a connecting sleeve, the fine filtering net 27 can be used for carrying out secondary filtering on sewage, and small particle impurities in the sewage are filtered out.
Fine filter screen 27 below both sides are equipped with first dwang 11, second dwang 24 respectively, first dwang 11, second dwang 24 are located fixed rotating shaft 10 both sides respectively and rotate with rose box 1 and are connected, all be equipped with cam 26 on first dwang 11, the second dwang 24, cam 26 and fine filter screen 27 lower surface contact can utilize first dwang 11, second dwang 24 pivoted to drive cam 26 simultaneously and rotate, and cam 26 pivoted is with fine filter screen 27 jack-up simultaneously to make the impurity on the fine filter screen 27 along the domatic landing of fine filter screen 27 slope to second row's miscellaneous mouthful 21 department to discharge to collection inslot 20 through second row miscellaneous mouthful 21.
Install fixed frame 23 on the fixed rotating shaft 10, first dwang 11, second dwang 24 one end all extend to fixed frame 23 in and rotate with fixed frame 23 and be connected, can utilize first dwang 11, the synchronous rotation of second dwang 24 to drive cam 26 and rotate and upwards jack-up fine filter screen 27, be convenient for clear up fine filter screen 27 surface.
Fixed mounting has drive bevel gear 22 on the fixed rotating shaft 10, the equal meshing in drive bevel gear 22 both sides is connected with driven bevel gear 25, and is two sets of driven bevel gear 25 respectively with first dwang 11, 24 one end fixed connection of second dwang, drive bevel gear 22 and two sets of driven bevel gear 25 all is located fixed frame 23 inside, can utilize fixed rotating shaft 10 to rotate to drive bevel gear 22 and rotate, drive bevel gear 22 pivoted while meshing two sets of driven bevel gear 25 and rotate, thereby make first dwang 11 and second dwang 24 rotate.
The side wall of the filtering box 1 is provided with a second impurity discharging port 21, the second impurity discharging port 21 is positioned on one side of the fine filtering net 27, a collecting tank 20 is arranged on one side of the second impurity discharging port 21, the collecting tank 20 is annularly arranged on the outer wall of the filtering box 1, so that impurities on the fine filtering net 27 can slide to the second impurity discharging port 21 along the inclined slope surface of the fine filtering net 27 and are discharged into the collecting tank 20 through the second impurity discharging port 21.
It should be noted that, when the sewage purification device works, the driving motor 6 is started to work, the driving motor 6 is utilized to drive the first roller shaft 5 to rotate, so that the filter screen roller 4 rotates, the first roller shaft 5 drives the second roller shaft 12 to rotate through the transmission belt 18 while rotating, the second roller shaft 12 drives the brush roller 13 to synchronously rotate while rotating, sewage is added into the filter box 1 through the water inlet 2, the sewage is firstly contacted with the filter screen roller 4, the sewage falls into the filter box 1 after being filtered by the filter screen roller 4, meanwhile, large-particle impurities in the sewage fall on the surface of the filter screen roller 4, the filter screen roller 4 is contacted with the brush roller 13 while rotating, the brush roller 13 cleans the impurities on the surface of the filter screen roller 4 and falls into the cleaning box 19 while rotating, the brush roller 13 contacts with the cleaning teeth 17 while rotating, and the brush cleaning teeth 17 can clean the brush on the brush roller 13, the cleaning effect is prevented from being influenced by impurities adhered to the brush, meanwhile, the impurities falling off after the filter screen roller 4 is cleaned by the brush roller 13 can be guided into the cleaning box 19 by the guide plate 16, and the cleaning box 19 can be prevented from sewage entering due to the hollow arrangement; the sewage after primary filtration is collected by the inverted circular truncated cone type water guide cylinder 7 and is discharged through the water outlet 8 in a unified way, so that the sewage rushes to the blades 9, the blades 9 are rotated to drive the fixed rotating shaft 10 to rotate, meanwhile, the sewage falls on the surface of the fine filter screen 27, impurities with small particles in the sewage are filtered out by the fine filter screen 27, the fixed rotating shaft 10 can be utilized to rotate, so as to drive the driving bevel gear 22 to rotate, the driving bevel gear 22 is meshed with two groups of driven bevel gears 25 to rotate while rotating, so as to enable the first rotating rod 11 and the second rotating rod 24 to rotate, the first rotating rod 11 and the second rotating rod 24 drive the cam 26 to rotate while rotating, the fine filter screen 27 is jacked upwards while the cam 26 rotates, so that the impurities on the fine filter screen 27 slide to the second impurity discharge port 21 along the inclined slope surface of the fine filter screen 27, and are discharged into the collecting groove 20 through the second impurity discharge, the surface of the fine filter screen 27 can be cleaned in time, continuous filtering work can be guaranteed, the filtering efficiency is high, and the use is convenient.

Claims (10)

1. The utility model provides a sewage purification device, its characterized in that, includes rose box (1), water inlet (2), outlet (3), clean case (19), first filtering component, second filtering component and clean mechanism, water inlet (2) are seted up in rose box (1) upper end, outlet (3) are located rose box (1) bottom one side, clean case (19) are located rose box (1) one side and with rose box (1) inside intercommunication, first filtering component includes filter screen roller (4), first roller (5) and driving motor (6), filter screen roller (4) are located rose box (1) inside top, first roller (5) run through filter screen roller (4) and with filter screen roller (4) fixed connection, first roller (5) one end is rotated with rose box (1) one side inner wall roller and is connected, and the first roller (5) other end extends to rose box (1) outside and with the output end solid fixed connection of driving motor (6), and the first roller (5) other end extends to the rose box (1) outside and the fixed connection is realized, the driving motor (6) is fixedly installed on one side wall of the filter box (1) through the installation plate, the second filter assembly is located below the first filter assembly, the cleaning mechanism is located inside the cleaning box (19), and the cleaning mechanism is located on one side of the first filter assembly.
2. The sewage purification apparatus according to claim 1, wherein: the cleaning mechanism comprises a second roller shaft (12) and a brush roller (13), one end of the second roller shaft (12) is rotatably connected with the inner wall of one side of the cleaning box (19), the other end of the second roller shaft (12) extends to the outside of the cleaning box (19) and is connected with a transmission belt (18) through a belt pulley, one end of the transmission belt (18) is connected with the first roller shaft (5) through the belt pulley, the brush roller (13) is fixedly sleeved on the second roller shaft (12), and the brush roller (13) is in surface contact with one side of the filter screen roller (4).
3. The sewage purification apparatus according to claim 2, wherein: first trash outlet (14) have been seted up to clean case (19) bottom, and the inside bottom one side fixed mounting of clean case (19) has cleaning frame (15), be equipped with brush cleaning teeth (17) on cleaning frame (15), brush cleaning teeth (17) and brush roller (13) surface contact.
4. A sewage purification apparatus according to claim 3, wherein: clean frame (15) one side is equipped with guide plate (16), guide plate (16) adopt hollow out construction, guide plate (16) are the slope setting, guide plate (16) one end and the inside bottom fixed connection of clean case (19), and guide plate (16) other end extends to filter screen roller (4) below one side.
5. The sewage purification apparatus according to claim 1, wherein: filter screen roller (4) below is equipped with inverted circular truncated cone type water guide cylinder (7), delivery port (8) have been seted up to inverted circular truncated cone type water guide cylinder (7) bottom, rose box (1) inside is equipped with fixed rotating shaft (10), fixed rotating shaft (10) bottom is rotated with rose box (1) inside bottom and is connected, fixed rotating shaft (10) top is connected with blade (9), blade (9) are located delivery port (8) under.
6. The sewage purification apparatus according to claim 1, wherein: the second filtering component comprises a fine filtering net (27), the fine filtering net (27) is made of soft materials, and the middle part of the fine filtering net (27) is sleeved on the fixed rotating shaft (10) through a connecting sleeve.
7. The sewage purification apparatus according to claim 6, wherein: thin filter screen (27) below both sides are equipped with first dwang (11), second dwang (24) respectively, first dwang (11), second dwang (24) are located fixed rotating shaft (10) both sides respectively and rotate with rose box (1) and are connected, all be equipped with cam (26) on first dwang (11), second dwang (24), cam (26) and thin filter screen (27) lower surface contact.
8. The sewage purification apparatus according to claim 7, wherein: fixed frame (23) are installed to fixed pivot (10), first dwang (11), second dwang (24) one end all extend to in fixed frame (23) and rotate with fixed frame (23) and be connected.
9. The sewage purification apparatus according to claim 7, wherein: fixed mounting has drive bevel gear (22) on fixed rotating shaft (10), drive bevel gear (22) both sides all mesh connection has driven bevel gear (25), and is two sets of driven bevel gear (25) respectively with first dwang (11), second dwang (24) one end fixed connection, drive bevel gear (22) and two sets of driven bevel gear (25) all are located fixed frame (23) inside.
10. The sewage purification apparatus according to claim 1, wherein: the filter box is characterized in that a second impurity discharging port (21) is formed in the side wall of the filter box (1), the second impurity discharging port (21) is located on one side of the fine filter screen (27), a collecting tank (20) is arranged on one side of the second impurity discharging port (21), and the collecting tank (20) is arranged on the outer wall of the filter box (1) in an annular mode.
CN202021549786.XU 2020-07-30 2020-07-30 Sewage purification device Active CN212818591U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021549786.XU CN212818591U (en) 2020-07-30 2020-07-30 Sewage purification device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN202021549786.XU CN212818591U (en) 2020-07-30 2020-07-30 Sewage purification device
PCT/CN2020/106142 WO2020228860A2 (en) 2020-07-30 2020-07-31 Wastewater purification apparatus
JP2020600138U JP3232974U (en) 2020-07-30 2020-07-31 Sewage purification device

Publications (1)

Publication Number Publication Date
CN212818591U true CN212818591U (en) 2021-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021549786.XU Active CN212818591U (en) 2020-07-30 2020-07-30 Sewage purification device

Country Status (3)

Country Link
JP (1) JP3232974U (en)
CN (1) CN212818591U (en)
WO (1) WO2020228860A2 (en)

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CN113812331A (en) * 2021-09-17 2021-12-21 濮阳市水利勘测设计院 Water supply system for farmland

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CN113082838A (en) * 2021-05-14 2021-07-09 安徽马钢张庄矿业有限责任公司 Sewage treatment mechanism for green drainage of super-huge metal mine
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Publication number Priority date Publication date Assignee Title
CN113431169A (en) * 2021-08-06 2021-09-24 郝丽坤 Drainage device for highway engineering and construction method thereof
CN113812331A (en) * 2021-09-17 2021-12-21 濮阳市水利勘测设计院 Water supply system for farmland

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JP3232974U (en) 2021-07-15
WO2020228860A3 (en) 2021-05-20

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