CN111453877A - Environment-friendly multi-stage filtration type sewage treatment device - Google Patents
Environment-friendly multi-stage filtration type sewage treatment device Download PDFInfo
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- CN111453877A CN111453877A CN202010170145.1A CN202010170145A CN111453877A CN 111453877 A CN111453877 A CN 111453877A CN 202010170145 A CN202010170145 A CN 202010170145A CN 111453877 A CN111453877 A CN 111453877A
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- sewage treatment
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- transmission
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- 239000010865 sewage Substances 0.000 title claims abstract description 50
- 238000001914 filtration Methods 0.000 title claims abstract description 38
- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 230000007613 environmental effect Effects 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 45
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 14
- 238000001556 precipitation Methods 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 7
- 238000004062 sedimentation Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 7
- 238000005096 rolling process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000004659 sterilization and disinfection Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000012629 purifying agent Substances 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/26—Reducing the size of particles, liquid droplets or bubbles, e.g. by crushing, grinding, spraying, creation of microbubbles or nanobubbles
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention discloses an environment-friendly multistage filtering type sewage treatment device, which relates to the field of environmental protection and comprises a treatment box, wherein a separation and transmission device is arranged at the upper part in the treatment box, a rolling dewatering device is arranged above the separation and transmission device, a garbage crushing device is arranged at one side of the separation and transmission device, the output end of a chemical adding, mixing and transmission device is fixedly connected with a filtering device, the output end of the filtering device is fixedly connected with a drain pipe, and the drain pipe extends to the outside of the treatment box. Thereby effectively reducing the impurity content in the sewage, and having comprehensive treatment on the sewage and good treatment effect.
Description
Technical Field
The invention relates to the field of environmental protection, in particular to an environmental-friendly multistage filtration type sewage treatment device.
Background
The development of industrialization and modern agriculture creates huge material wealth and brings serious pollution to the water environment. With the centralized sewage treatment, the problem of water environment pollution concerned by people is solved, and the centralized sewage treatment becomes a main mode of urban sewage treatment. However, when large-scale sewage centralized treatment is performed, the construction of a corresponding pipe network is inevitably performed, and a huge pipe network system and a midway lifting pump station are required. The investment is huge and the operation and maintenance cost is expensive. In terms of pollution spread, centralized sewage treatment is clearly lacking in sustainability. Currently, only affluent countries can all popularize sanitary equipment and treatment systems. Regardless of the level of industrialization and modernization, a large percentage of people always live in rural or remote areas. These places are far away from municipal pipe networks, and the sewage is difficult to be effectively and intensively treated. The distributed sewage treatment devices are arranged in the regions, so that the problem of water pollution can be effectively solved.
Chinese utility model patent document No. CN208869464U discloses an environment-friendly multi-stage sewage treatment device, which comprises a first motor for driving a first rotating shaft to rotate, so that a sleeve drives a winding thorn to rotate, flocculent impurities in sewage after being shunted by a shunt pipeline can be removed, large granular substances are filtered by a grid plate, the sewage entering a sedimentation tank is ensured not to contain visible impurities, the sewage purified and precipitated by a purifying agent undergoes an oxidation-reduction reaction with a biological purification membrane to remove a large amount of impurities, finally, under the action of a stirring centrifugal tank, an active carbon adsorption layer is used for adsorbing the impurities in the sewage again, the complete purification of the sewage is ensured, but in the process of treating municipal sewage, more floating garbage such as plastic bags and the like exist in the sewage, the garbage is difficult to be cleaned, and after the floating garbage is simply filtered and separated, a large amount of sewage is still attached to the garbage, and the separation effect of the sewage and the garbage is not high.
Disclosure of Invention
The invention provides an environment-friendly multistage filtration type sewage treatment device, which solves the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an environmental protection multi-stage filtration type sewage treatment plant, is including handling the case, handles the fixed water inlet that is equipped with in top of case, the upper portion of handling the incasement is equipped with separation conveyer, and separation conveyer's top is equipped with the roll-in water trap, one side of separation conveyer is equipped with rubbish reducing mechanism, the bottom fixed connection baffle of handling the case, one side of baffle are equipped with the precipitation tank, and the opposite side fixed connection of baffle catchments the cover, catchments the cover and connect and add medicine and mix conveyor, adds medicine and mix conveyor's output fixed connection filter equipment, filter equipment's output fixed connection drain pipe, the drain pipe extends to the outside of handling the case.
As a preferred technical scheme of the invention, the separation and transmission device comprises two transmission rollers which are rotatably connected with the inner wall of the treatment tank, the outer sides of the two transmission rollers are in transmission connection with a transmission belt, a baffle is fixedly connected with the top part in the treatment tank between the water inlet and the transmission belt, a water receiving tank is arranged between the two transmission rollers, one side of the bottom of the water receiving tank is fixedly connected with a drainage cover, one end of the bottom of the drainage cover is fixedly connected with a sewer pipe, and one end of the sewer pipe, which is far away from the drainage cover, is arranged in the.
As a preferred technical scheme of the invention, the rolling dewatering device comprises a plurality of pressing rollers arranged above the transmission belt, and the pressing rollers are in transmission connection with the transmission belt.
As a preferred technical scheme of the invention, the top end of the water receiving tank is provided with a water receiving port, and the top of the water receiving tank on one side of the water receiving port is provided with intensive water receiving holes.
As a preferred technical scheme, the garbage crushing device comprises a guide-out cover fixedly connected to the side edge of the treatment box, the top of the guide-out cover is tangent to the surface of a transmission belt, a plurality of rotating rods are rotatably connected in the guide-out cover, a plurality of crushing blades are fixedly connected to the outer portion of each rotating rod, and a slag discharge port corresponding to the guide-out cover is formed in the treatment box.
As a preferred technical scheme of the invention, a precipitation filter plate is arranged in the precipitation tank, the precipitation filter plate is fixedly connected with the partition plate and the treatment tank, and a plurality of leakage grooves are formed in the precipitation filter plate.
As a preferable technical scheme of the invention, the dosing, mixing and conveying device comprises a conveying pipe, the end part of the conveying pipe is fixedly connected with a conveying motor, an output shaft of the conveying motor is arranged in the conveying pipe and is fixedly connected with a conveying shaft, the outside of the conveying shaft is fixedly connected with a spiral feeding plate, and the top end of the conveying pipe is fixedly connected with a dosing pump.
As a preferable technical solution of the present invention, a plurality of stirring rods are axially and fixedly connected to the conveying shaft.
As a preferred technical scheme of the invention, the filtering device comprises a filtering sleeve, an activated carbon bag is fixedly connected in the filtering sleeve, and filter screens are arranged on two sides of the activated carbon bag.
As a preferable technical scheme of the invention, a first driving motor and a second driving motor which are used for respectively driving the transmission roller and the rotating rod to rotate are fixedly arranged outside the treatment box.
The invention has the following advantages: according to the invention, the separation and conveying device is arranged to filter garbage with a large volume in sewage, the rolling dewatering device is arranged to roll the filtered garbage to remove water contained in the garbage, the garbage crushing device is arranged to crush the dewatered garbage and discharge the crushed garbage, the chemical adding mixing and conveying device is arranged to add chemicals to the filtered sewage for sterilization and conveying, and the filtering device is arranged to filter and adsorb the sewage again, so that the impurity content in the sewage is effectively reduced, the sewage is comprehensively treated, and the treatment effect is good.
Drawings
FIG. 1 is a schematic view showing the construction of an environmental-friendly multistage filtration type sewage treatment apparatus.
Fig. 2 is a schematic structural view of a water receiving tank in the environment-friendly multi-stage filtration type sewage treatment device.
FIG. 3 is a schematic structural view of a chemical feeding mixing and conveying device in the environmental-friendly multi-stage filtration type sewage treatment device.
FIG. 4 is a schematic view showing a structure of a filtering apparatus in the environmental-friendly multi-stage filtering type sewage treatment apparatus.
In the figure: 1. a treatment tank; 2. a water inlet; 3. a driving roller; 4. a transmission belt; 5. a compression roller; 6. a baffle plate; 7. a water receiving tank; 8. a drain cover; 9. a sewer pipe; 10. a lead-out cover; 11. rotating the rod; 12. a crushing blade; 13. a slag discharge port; 14. a partition plate; 15. a sediment filter plate; 16. a leak groove; 17. a water collection cover; 18. a delivery pipe; 19. a conveying motor; 20. a filtration device; 21. a drain pipe; 22. a dosing pump; 23. a water receiving port; 24. a water receiving hole; 25. a delivery shaft; 26. a screw feeding plate; 27. a stirring rod; 28. a filter sleeve; 29. filtering with a screen; 30. and (5) an active carbon bag.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-4, an environmental protection multi-stage filtration type sewage treatment device comprises a treatment tank 1, a water inlet 2 is fixedly arranged at the top end of the treatment tank 1, a separation and transmission device is arranged at the upper part in the treatment tank 1, a rolling dewatering device is arranged above the separation and transmission device, a garbage crushing device is arranged at one side of the separation and transmission device, a partition plate 14 is fixedly connected to the bottom end of the treatment tank 1, a precipitation tank is arranged at one side of the partition plate 14, a water collecting cover 17 is fixedly connected to the other side of the partition plate 14, the water collecting cover 17 is connected with a dosing mixing and conveying device, the output end of the dosing mixing and conveying device is fixedly connected with a filtering device 20, the output end of the filtering device 20 is fixedly connected with a drain pipe.
The separation conveyer includes two driving rollers 3 that are connected with the rotation of the inner wall of the treatment box 1, the outside transmission connection drive belt 4 of two driving rollers 3, the top fixed connection baffle 6 in the treatment box 1 between the water inlet 2 and the drive belt 4, be equipped with water receiving tank 7 between two driving rollers 3, bottom one side fixed connection drainage cover 8 of water receiving tank 7, the bottom one end fixed connection downcomer 9 of drainage cover 8, the one end that the drainage cover 8 was kept away from to downcomer 9 is arranged in the precipitation tank.
The roll-in water trap is including setting up a plurality of compression rollers 5 in 4 tops of drive belt, and compression roller 5 is connected with the transmission of driving roller 3. The top of the water receiving tank 7 is provided with a water receiving port 23, and the top of the water receiving tank 7 on one side of the water receiving port 23 is provided with intensive water receiving holes 24.
Rubbish reducing mechanism includes fixed connection in the derivation cover 10 of handling case 1 side, and the top of deriving cover 10 is tangent with 4 surfaces of drive belt, derives 10 internal rotation connections of cover and has a plurality of dwangs 11, a plurality of crushing blades 12 of the equal fixed connection in outside of every dwang 11, set up on the handling case 1 and derive the corresponding row's cinder notch 13 of cover 10. The fixed first driving motor and the second driving motor that are used for driving roller 3 and dwang 11 respectively to rotate that are equipped with in the outside of handling case 1.
The dosing mixing and conveying device comprises a conveying pipe 18, the end part of the conveying pipe 18 is fixedly connected with a conveying motor 19, an output shaft of the conveying motor 19 is arranged in the conveying pipe 18 and is fixedly connected with a conveying shaft 25, the outside of the conveying shaft 25 is fixedly connected with a spiral feeding plate 26, and the top end of the conveying pipe 18 is fixedly connected with a dosing pump 22. A plurality of stirring rods 27 are axially and fixedly connected to the conveying shaft 25. The filtering device 20 comprises a filtering sleeve 28, an activated carbon bag 30 is fixedly connected in the filtering sleeve 28, and filter screens 29 are arranged on two sides of the activated carbon bag 30.
Example 2
Referring to fig. 1 to 4, the other contents of the present embodiment are the same as embodiment 1, except that: the sedimentation tank is internally provided with a sedimentation filter plate 15, the sedimentation filter plate 15 is fixedly connected with the partition plate 14 and the treatment tank 1, the sedimentation filter plate 15 is provided with a plurality of leakage grooves 16, and the diameter of the top of each leakage groove 16 is larger than that of the bottom of the leakage groove.
According to the invention, the separation and conveying device is arranged to filter garbage with a large volume in sewage, the rolling dewatering device is arranged to roll the filtered garbage to remove water contained in the garbage, the garbage crushing device is arranged to crush the dewatered garbage and discharge the crushed garbage, the chemical adding mixing and conveying device is arranged to add chemicals to the filtered sewage for sterilization and conveying, and the filtering device 20 is arranged to filter and adsorb the sewage again, so that the impurity content in the sewage is effectively reduced, the sewage is comprehensively treated, and the treatment effect is good.
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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. 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 (10)
1. The utility model provides an environmental protection multi-stage filtration type sewage treatment plant, is including handling case (1), handles the fixed water inlet (2) that is equipped with in top of case (1), its characterized in that, the upper portion of handling in case (1) is equipped with separation conveyer, and separation conveyer's top is equipped with the roll-in water trap, one side of separation conveyer is equipped with rubbish reducing mechanism, the bottom fixed connection baffle (14) of handling case (1), one side of baffle (14) are equipped with the precipitation tank, and the opposite side fixed connection of baffle (14) catchments cover (17), and it connects and adds medicine and mixes conveyor to catchment cover (17), mixes medicine conveyor's output fixed connection filter equipment (20), the output fixed connection drain pipe (21) of filter equipment (20), and drain pipe (21) extend to the outside of handling case (1).
2. The environment-friendly multistage filtration type sewage treatment device according to claim 1, wherein the separation and transmission device comprises two transmission rollers (3) rotatably connected with the inner wall of the treatment tank (1), the outer sides of the two transmission rollers (3) are in transmission connection with the transmission belt (4), a top fixed connection baffle (6) in the treatment tank (1) between the water inlet (2) and the transmission belt (4), a water receiving tank (7) is arranged between the two transmission rollers (3), one side of the bottom of the water receiving tank (7) is fixedly connected with a water discharge cover (8), one end of the bottom of the water discharge cover (8) is fixedly connected with a sewer pipe (21), and one end of the sewer pipe (21) far away from the water discharge cover (8) is arranged in the sedimentation tank.
3. The sewage treatment device of environmental protection and multistage filtration type according to claim 2, wherein the roller dewatering device comprises a plurality of rollers (5) disposed above the transmission belt (4), and the rollers (5) are in transmission connection with the transmission roller (3).
4. The environment-friendly multistage filtration type sewage treatment device according to claim 3, wherein a water receiving port (23) is formed at the top end of the water receiving tank (7), and intensive water receiving holes (24) are formed in the top of the water receiving tank (7) on one side of the water receiving port (23).
5. The environment-friendly multistage-filtration-type sewage treatment device according to claim 2, wherein the garbage crushing device comprises a guide cover (10) fixedly connected to the side of the treatment tank (1), the top of the guide cover (10) is tangent to the surface of the transmission belt (4), a plurality of rotating rods (11) are rotatably connected in the guide cover (10), a plurality of crushing blades (12) are fixedly connected to the outer part of each rotating rod (11), and a slag discharge port (13) corresponding to the guide cover (10) is formed in the treatment tank (1).
6. The environment-friendly multistage filtration type sewage treatment device according to claim 1, wherein a precipitation filter plate (15) is arranged in the precipitation tank, the precipitation filter plate (15) is fixedly connected with the partition plate (14) and the treatment tank (1), and a plurality of leakage grooves (16) are formed in the precipitation filter plate (15).
7. The sewage treatment device of the environmental protection type with multi-stage filtration according to claim 1, wherein the dosing mixing and conveying device comprises a conveying pipe (18), the end of the conveying pipe (18) is fixedly connected with a conveying motor (19), the output shaft of the conveying motor (19) is arranged in the conveying pipe (18) and is fixedly connected with a conveying shaft (25), the outer part of the conveying shaft (25) is fixedly connected with a spiral feeding plate (26), and the top end of the conveying pipe (18) is fixedly connected with a dosing pump (22).
8. The sewage treatment plant of the environmental protection type, with multiple stages of filtration according to claim 7, wherein a plurality of stirring rods (27) are axially and fixedly connected to the transport shaft (25).
9. The sewage treatment device of the environmental protection multistage filtration type according to claim 6 or 7, wherein the filtering device (20) comprises a filtering sleeve (28), an activated carbon bag (30) is fixedly connected in the filtering sleeve (28), and both sides of the activated carbon bag (30) are provided with filter screens (29).
10. The sewage treatment device of environmental protection and multi-stage filtration type according to claim 5, wherein the treatment tank (1) is externally and fixedly provided with a first driving motor and a second driving motor for respectively driving the driving roller (3) and the rotating rod (11) to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170145.1A CN111453877A (en) | 2020-03-12 | 2020-03-12 | Environment-friendly multi-stage filtration type sewage treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010170145.1A CN111453877A (en) | 2020-03-12 | 2020-03-12 | Environment-friendly multi-stage filtration type sewage treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111453877A true CN111453877A (en) | 2020-07-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010170145.1A Withdrawn CN111453877A (en) | 2020-03-12 | 2020-03-12 | Environment-friendly multi-stage filtration type sewage treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111453877A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112645539A (en) * | 2020-12-20 | 2021-04-13 | 衢州创普机械设备有限公司 | Double-effect microbial filter bed for industrial sewage purification treatment |
| CN114956367A (en) * | 2022-04-12 | 2022-08-30 | 河北天工水韵环保科技有限公司 | Industrial sewage multi-stage treatment system with water recycling function |
-
2020
- 2020-03-12 CN CN202010170145.1A patent/CN111453877A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112645539A (en) * | 2020-12-20 | 2021-04-13 | 衢州创普机械设备有限公司 | Double-effect microbial filter bed for industrial sewage purification treatment |
| CN114956367A (en) * | 2022-04-12 | 2022-08-30 | 河北天工水韵环保科技有限公司 | Industrial sewage multi-stage treatment system with water recycling function |
| CN114956367B (en) * | 2022-04-12 | 2023-04-07 | 河北天工水韵环保科技有限公司 | Industrial sewage multi-stage treatment system with water recycling function |
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Application publication date: 20200728 |
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| WW01 | Invention patent application withdrawn after publication |