CN113336363A - Building engineering waste water centralized treatment device - Google Patents
Building engineering waste water centralized treatment device Download PDFInfo
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- CN113336363A CN113336363A CN202110704157.2A CN202110704157A CN113336363A CN 113336363 A CN113336363 A CN 113336363A CN 202110704157 A CN202110704157 A CN 202110704157A CN 113336363 A CN113336363 A CN 113336363A
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- box
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- 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)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention provides a centralized treatment device for construction engineering wastewater. The construction engineering wastewater centralized treatment device comprises a supporting plate; the pretreatment box is fixedly arranged on the top of the supporting plate; one end of the corrugated pipe is communicated with the pretreatment tank; the settling tank is fixedly arranged on the supporting plate, and the other end of the corrugated pipe is communicated with the settling tank; the connecting pipe is fixedly arranged on one side of the settling tank, which is far away from the corrugated pipe; the ceramic membrane treatment box is fixedly arranged on the supporting plate, the ceramic membrane treatment box is located on one side, away from the pretreatment box, of the settling box, and the ceramic membrane treatment box is communicated with the settling box through the connecting pipe. The centralized treatment device for the construction engineering wastewater provided by the invention has the advantages of convenience in use and movement and capability of quickly treating sewage generated in the construction process.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a device for centralized treatment of constructional engineering wastewater.
Background
In the building engineering work progress, produce waste water easily, specifically if: 1. in the construction process, grease (engine oil and the like) which mechanically seeps on the ground is flushed by rainwater to generate sewage; 2. domestic waste discarded by construction workers at a construction site; 3. the building waste is soaked by rainwater to produce sewage and the like.
Most of the existing building projects do not treat the sewage, so that the sewage is easy to permeate into underground water or be discharged into rivers, and the underground water or the rivers are easy to be polluted.
Therefore, there is a need to provide a new centralized wastewater treatment device for construction engineering to solve the above technical problems.
Disclosure of Invention
The invention aims to provide a centralized treatment device for construction engineering wastewater, which is convenient to use and move and can quickly treat the wastewater generated in the construction process.
In order to solve the technical problem, the invention provides a centralized treatment device for construction engineering wastewater, which comprises: a support plate; the pretreatment box is fixedly arranged on the top of the supporting plate; one end of the corrugated pipe is communicated with the pretreatment tank; the settling tank is fixedly arranged on the supporting plate, and the other end of the corrugated pipe is communicated with the settling tank; the connecting pipe is fixedly arranged on one side of the settling tank, which is far away from the corrugated pipe; the ceramic membrane treatment box is fixedly arranged on the supporting plate, the ceramic membrane treatment box is located on one side, away from the pretreatment box, of the settling box, and the ceramic membrane treatment box is communicated with the settling box through the connecting pipe.
Preferably, the preliminary treatment case includes first box, slidable mounting has the baffle on the first box, first box is kept away from one side fixed mounting of bellows has the water pump, the play water end of water pump extends to in the first box, fixed mounting has the grid in the first box, the play water end of water pump is just right the grid.
Preferably, a sliding groove is formed in the first box body, and the partition plate is slidably mounted in the sliding groove.
Preferably, the mounting hole has been seted up on one side inner wall of first box, be provided with the filter screen in the mounting hole, the one end of bellows with the filter screen contacts, the outside fixed mounting of bellows has a plurality of fixed blocks that are the annular and distribute, the fixed block is kept away from one side of first box is equipped with the internal thread piece, the internal thread piece with the fixed block contacts, the screw rod is installed to the internal thread piece internal thread, the screw rod run through the fixed block and with fixed block sliding connection.
Preferably, the setting tank includes the awl under casing, the puddler is installed to awl under casing internal rotation, the top of puddler extends to the outside of awl under casing, fixed mounting has a plurality of stirring leaves on the puddler, the top fixed mounting of awl under casing has power unit, power unit is used for rotating the puddler, the top fixed mounting of awl under casing has the pencil that adds, the bottom fixed mounting of awl under casing has the collection sediment pipe, the bottom of collection sediment pipe has the apron through bolt fixed mounting.
Preferably, power unit includes fixed mounting and is in the first motor at awl end case top, fixed cover is equipped with first belt pulley on the output shaft of first motor, the fixed cover in the outside of puddler is equipped with the second belt pulley, first belt pulley with the cover is equipped with same belt on the second belt pulley.
Preferably, the ceramic membrane treatment box comprises a second box body, a high-pressure water pump is fixedly mounted at the top of the second box body, the water inlet end of the high-pressure water pump is communicated with the settling tank, a nano ceramic membrane is fixedly mounted in the second box body, and a drain pipe is fixedly mounted on one side of the second box body.
Preferably, the top fixed mounting of dosing pipe has the glass case, sliding seal installs the push pedal in the glass case, the top fixed mounting of push pedal has the push rod, the top of push rod extends to outside the glass case, the push rod with glass case sliding connection, the top fixed mounting of glass case has the second motor, fixed cover is equipped with the eccentric wheel on the output shaft of second motor, the bottom of eccentric wheel with the push rod contacts, the top of glass case is equipped with into the liquid fill, the bottom of advancing the liquid fill runs through the push pedal.
Preferably, be equipped with first check valve in the push pedal, fixed mounting has the second check valve on the dosing pipe, fixed mounting has the water valve on the liquid inlet funnel, the water valve is located the top of glass case, one side of glass case is equipped with the scale mark.
Preferably, the top of push rod is seted up both sides and is the open-ended recess, equal fixed mounting has the stopper on the both sides inner wall of recess, the stopper extend to in the eccentric wheel and with sliding connection.
Compared with the prior art, the centralized treatment device for the construction engineering wastewater provided by the invention has the following beneficial effects:
the invention provides a centralized treatment device for construction engineering wastewater, which can quickly and conveniently carry out multistage filtration on solid pollutants in wastewater through a pretreatment tank, thereby improving the treatment efficiency of the wastewater; through the settling tank, pollutants in the sewage can be subjected to flocculation and sedimentation through adding medicines; the ceramic membrane treatment box can be used for deeply filtering sewage, so that the sewage reaches the discharge standard or the recycling mark.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of a centralized treatment device for construction engineering wastewater, provided by the invention;
FIG. 2 is a schematic view of the pretreatment tank shown in FIG. 1;
FIG. 3 is an enlarged view of part A of FIG. 2;
FIG. 4 is a schematic view of the settling tank of FIG. 1;
FIG. 5 is a schematic view of the structure of the ceramic membrane treatment chamber shown in FIG. 1;
FIG. 6 is a schematic view of a second embodiment of the centralized treatment device for construction engineering wastewater provided by the invention;
FIG. 7 is an enlarged schematic view of portion B shown in FIG. 6;
FIG. 8 is a schematic structural view of the eccentric shown in FIG. 6;
reference numbers in the figures: 1. the device comprises a supporting plate, 2, a pretreatment tank, 21, a first tank body, 22, a partition plate, 23, a water pump, 24, a grating, 25, a filter screen, 3, a corrugated pipe, 31, a fixing block, 32, an internal thread block, 33, a screw rod, 4, a settling tank, 41, a conical bottom tank, 42, a stirring rod, 43, a stirring blade, 44, a power mechanism, 45, a dosing pipe, 451, a glass tank, 452, a push plate, 453, a push rod, 454, an eccentric wheel, 455, a second motor, 456, a liquid inlet hopper, 457, a first check valve, 458, a second check valve, 459, a scale mark, 46, a slag collecting pipe, 47, a cover plate, 5, a connecting pipe, 6, a treatment tank, 61, a ceramic membrane, a second tank body, 62, a high-pressure water pump, 63, a nanometer pump, 64 and a water outlet pipe.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
The first embodiment:
referring to fig. 1-5, in a first embodiment of the present invention, a centralized wastewater treatment device for construction engineering comprises: a support plate 1; the pretreatment tank 2 is fixedly arranged on the top of the support plate 1; one end of the corrugated pipe 3 is communicated with the pretreatment tank 2; the settling tank 4 is fixedly arranged on the supporting plate 1, and the other end of the corrugated pipe 3 is communicated with the settling tank 4; the connecting pipe 5 is fixedly arranged on one side, far away from the corrugated pipe 3, of the settling tank 4; ceramic membrane treatment box 6, ceramic membrane treatment box 6 fixed mounting be in on the backup pad 1, just ceramic membrane treatment box 6 is located precipitation box 4 is kept away from one side of pretreatment tank 2, ceramic membrane treatment box 6 passes through connecting pipe 5 with precipitation box 4 is linked together.
The first box body 21 is provided with a sliding groove, the partition plate 22 is slidably mounted in the sliding groove, and the partition plate 22 is arranged in the first box body 21, so that sewage can be prevented from splashing out of the first box body 21, and meanwhile, the cleaning work of the grating can be facilitated.
The inner wall of one side of the first box body 21 is provided with a mounting hole, a filter screen 25 is arranged in the mounting hole, one end of the corrugated pipe 3 is contacted with the filter screen 25, the outer side of the corrugated pipe 3 is fixedly provided with a plurality of fixing blocks 31 which are distributed in an annular shape, one side of each fixing block 31 far away from the first box body 21 is provided with an internal thread block 32, the internal thread block 32 is contacted with the fixing block 31, a screw 33 is arranged in the internal thread block 32, the screw 33 penetrates through the fixing block 31 and is in sliding connection with the fixing block 31, by arranging the filter screen 25, more effective filtration of solid matters in sewage can be ensured, the sewage treatment work of the next step can be facilitated, and meanwhile, through the scalability of the corrugated pipe 3 and the cooperation of the fixing block 31, the internal thread block 32 and the screw 33, the disassembly and assembly work of the filter screen 25 can be facilitated, thereby can conveniently be to the clearance of filter screen 25 and with the work of changing to can guarantee the normal filtration of filter screen 25 to sewage.
Settling tank 4 includes awl under casing 41, puddler 42 is installed to 41 internal rotations of awl under casing, the top of puddler 42 extends to the outside of awl under casing 41, fixed mounting has a plurality of stirring leaves 43 on the puddler 42, the top fixed mounting of awl under casing 41 has power unit 44, power unit 44 is used for rotating puddler 42, the top fixed mounting of awl under casing 41 has dosing pipe 45, the bottom fixed mounting of awl under casing 41 has collection sediment pipe 46, there is apron 47 bottom of collection sediment pipe 46 through bolt fixed mounting, can make things convenient for the deposit to gather in collection sediment pipe 6 through awl under casing 41 to can make things convenient for the cleaning work of deposit, set up apron 47 through the bottom at collection sediment pipe 6 simultaneously, can collect in collection sediment pipe 6 and fill up the cleaning work of deposit rear convenient for the deposit.
The power mechanism 44 comprises a first motor fixedly installed at the top of the conical bottom box 41, a first belt pulley is fixedly sleeved on an output shaft of the first motor, a second belt pulley is fixedly sleeved on the outer side of the stirring rod 42, and the first belt pulley and the second belt pulley are sleeved with the same belt.
Ceramic membrane treatment box 6 includes second box 61, the top fixed mounting of second box 61 has high pressure water pump 62, high pressure water pump 62 the end of intaking with settling tank 4 is linked together, fixed mounting has nanometer ceramic membrane 63 in the second box 61, one side fixed mounting of second box 61 has drain pipe 64, can pressurize in the second box 61 when the clear water in the sedimentation tank 41 can be taken out through high pressure water pump 62 to can improve the filtration efficiency of nanometer ceramic membrane 63 to sewage.
The working principle of the centralized treatment device for the construction engineering wastewater provided by the invention is as follows:
when the device is used, sewage enters the first box body 21 through the water pump 23, enters the sedimentation tank 4 through the filtration of the grating 24 and the filter screen 25, then the medicament is added into the conical bottom box 41 through the medicament adding pipe 45, the stirring rod 42 and the stirring blades 43 are driven to rotate through the power mechanism 44, the medicament is fully dissolved with the sewage in the conical bottom box 41, then the power mechanism 44 is closed, the sediment in the sewage in the conical bottom box 44 is gathered in the slag collecting pipe 46, the high-pressure water pump 62 is started, the clarified sewage in the conical bottom box 41 is introduced into the ceramic membrane treatment box 6, and the clarified sewage is safely discharged or recycled through the drain pipe 64 after being filtered through the nano ceramic membrane 63.
Compared with the prior art, the centralized treatment device for the construction engineering wastewater provided by the invention has the following beneficial effects:
the invention provides a centralized treatment device for construction engineering wastewater, which can quickly and conveniently carry out multistage filtration on solid pollutants in wastewater through a pretreatment tank 2, thereby improving the treatment efficiency of the wastewater; through the settling tank 4, pollutants in the sewage can be subjected to flocculation and sedimentation through adding medicines; the ceramic membrane treatment box 6 can be used for deeply filtering sewage, so that the sewage reaches the discharge standard or the recycling mark.
Second embodiment:
based on the constructional engineering wastewater centralized treatment device provided by the first embodiment of the application, the second embodiment of the application provides another constructional engineering wastewater centralized treatment device. The second embodiment is merely a preferred way of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.
The second embodiment of the present invention will be further described with reference to the drawings and the following description.
Referring to fig. 6-8, the centralized treatment device for construction engineering wastewater further includes a glass box 451 fixedly installed on the top of the chemical feeding pipe 45, a push plate 452 is installed in the glass box 451 in a sliding and sealing manner, a push rod 453 is fixedly installed on the top of the push plate 452, the top end of the push rod 453 extends out of the glass box 452, the push rod 453 is connected with the glass box 452 in a sliding manner, a second motor 455 is fixedly installed on the top of the glass box 451, an eccentric 454 is fixedly sleeved on an output shaft of the second motor 455, the bottom of the eccentric 454 is in contact with the push rod 453, a liquid inlet hopper 456 is installed above the glass box 451, and the bottom end of the liquid inlet hopper 456 penetrates through the push plate 452.
The push plate 452 is provided with a first one-way valve 457, the dosing pipe 45 is fixedly provided with a second one-way valve 458, the liquid inlet hopper 456 is fixedly provided with a water valve, the water valve is positioned above the glass box 451, and one side of the glass box 451 is provided with a scale mark 459.
A groove with two open sides is formed at the top of the push rod 453, and a limit block is fixedly mounted on the inner walls of the two sides of the groove, extends into the eccentric wheel 454, and is connected with the eccentric wheel 454 in a sliding manner.
When the medicine is added into the conical bottom box 4 through the medicine adding pipe 45, firstly, the liquid medicine or the configured liquid medicine is added into the glass box 451 through the liquid inlet funnel 456, the added medicine amount is determined through the scale mark 459 in the process, the medicine is stopped being added and the water valve is closed after the required medicine amount is added, then the second motor 455 is started, the second motor 455 rotates to drive the eccentric 454 to rotate, the eccentric 454 drives the push rod 453 to move up and down, the push rod 453 drives the push plate 452 to slide up and down in the glass box 451, when the push plate 452 moves down, the medicine or air enters the conical bottom box 41 through the second one-way valve 458, when the push plate 452 moves up, the first one-way valve 457 is opened, the air enters the lower part of the push plate 452, so that the medicine can be added quickly, and the medicine remained on the inner wall of the glass box 451 or the inner wall of the medicine adding pipe 45 in the medicine adding process, through above-mentioned pressurization process, can push remaining medicament in awl under casing 41, and at the true individual medicament in-process that adds, can effectively prevent sharp smell in the sewage and volatilize.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A building engineering waste water centralized treatment device is characterized by comprising:
a support plate;
the pretreatment box is fixedly arranged on the top of the supporting plate;
one end of the corrugated pipe is communicated with the pretreatment tank;
the settling tank is fixedly arranged on the supporting plate, and the other end of the corrugated pipe is communicated with the settling tank;
the connecting pipe is fixedly arranged on one side of the settling tank, which is far away from the corrugated pipe;
the ceramic membrane treatment box is fixedly arranged on the supporting plate, the ceramic membrane treatment box is located on one side, away from the pretreatment box, of the settling box, and the ceramic membrane treatment box is communicated with the settling box through the connecting pipe.
2. The centralized treatment device for the construction engineering wastewater according to claim 1, wherein the pretreatment tank comprises a first tank body, a partition plate is slidably mounted on the first tank body, a water pump is fixedly mounted on one side of the first tank body, which is far away from the corrugated pipe, the water outlet end of the water pump extends into the first tank body, a grid is fixedly mounted in the first tank body, and the water outlet end of the water pump is opposite to the grid.
3. The centralized treatment device for construction engineering wastewater as claimed in claim 2, wherein the first tank body is provided with a sliding groove, and the partition plate is slidably mounted in the sliding groove.
4. The centralized treatment device for the construction engineering wastewater as claimed in claim 2, wherein a mounting hole is formed in the inner wall of one side of the first box body, a filter screen is arranged in the mounting hole, one end of the corrugated pipe is in contact with the filter screen, a plurality of fixing blocks distributed in an annular shape are fixedly mounted on the outer side of the corrugated pipe, an internal thread block is arranged on one side of the fixing block away from the first box body, the internal thread block is in contact with the fixing block, a screw rod is mounted in the internal thread block in a threaded manner, and the screw rod penetrates through the fixing block and is in sliding connection with the fixing block.
5. The centralized treatment device for the construction engineering wastewater according to claim 1, wherein the settling tank comprises a conical bottom tank, a stirring rod is rotatably mounted in the conical bottom tank, the top end of the stirring rod extends to the outer side of the conical bottom tank, a plurality of stirring blades are fixedly mounted on the stirring rod, a power mechanism is fixedly mounted at the top of the conical bottom tank and used for rotating the stirring rod, a chemical feeding pipe is fixedly mounted at the top of the conical bottom tank, a slag collecting pipe is fixedly mounted at the bottom of the conical bottom tank, and a cover plate is fixedly mounted at the bottom of the slag collecting pipe through bolts.
6. The centralized treatment device for construction engineering wastewater as claimed in claim 5, wherein the power mechanism comprises a first motor fixedly mounted on the top of the conical bottom box, a first belt pulley is fixedly sleeved on an output shaft of the first motor, a second belt pulley is fixedly sleeved on the outer side of the stirring rod, and the same belt is sleeved on the first belt pulley and the second belt pulley.
7. The centralized treatment device for the construction engineering wastewater as recited in claim 5, wherein the ceramic membrane treatment tank comprises a second tank body, a high-pressure water pump is fixedly installed at the top of the second tank body, the water inlet end of the high-pressure water pump is communicated with the settling tank, a nano ceramic membrane is fixedly installed in the second tank body, and a drain pipe is fixedly installed at one side of the second tank body.
8. The centralized treatment device for construction engineering wastewater according to claim 5, wherein a glass box is fixedly installed at the top of the dosing pipe, a push plate is installed in the glass box in a sliding and sealing manner, a push rod is fixedly installed at the top of the push plate, the top end of the push rod extends out of the glass box, the push rod is connected with the glass box in a sliding manner, a second motor is fixedly installed at the top of the glass box, an eccentric wheel is fixedly sleeved on an output shaft of the second motor, the bottom of the eccentric wheel is in contact with the push rod, a liquid inlet hopper is arranged above the glass box, and the bottom end of the liquid inlet hopper penetrates through the push plate.
9. The centralized treatment device for construction engineering wastewater according to claim 8, wherein a first one-way valve is arranged on the push plate, a second one-way valve is fixedly arranged on the chemical feeding pipe, a water valve is fixedly arranged on the liquid inlet hopper, the water valve is positioned above the glass box, and scale marks are arranged on one side of the glass box.
10. The centralized treatment device for construction engineering wastewater according to claim 8, wherein a groove with openings at both sides is formed at the top of the push rod, and limit blocks are fixedly mounted on the inner walls at both sides of the groove and extend into the eccentric wheel and are connected with the eccentric wheel in a sliding manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110704157.2A CN113336363B (en) | 2021-06-24 | 2021-06-24 | Building engineering waste water centralized treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110704157.2A CN113336363B (en) | 2021-06-24 | 2021-06-24 | Building engineering waste water centralized treatment device |
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| CN113336363A true CN113336363A (en) | 2021-09-03 |
| CN113336363B CN113336363B (en) | 2022-04-22 |
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| CN202110704157.2A Active CN113336363B (en) | 2021-06-24 | 2021-06-24 | Building engineering waste water centralized treatment device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120046808A (en) * | 2010-10-27 | 2012-05-11 | (주)대우건설 | Cyclone type sewage disposal device for removing total phosphorus in treated sewage |
| CN105270795A (en) * | 2014-06-05 | 2016-01-27 | 深圳市安瑞科科技有限公司 | Automatic bottle-adding device |
| CN107337300A (en) * | 2017-08-26 | 2017-11-10 | 姚飞 | A kind of dyeing and printing sewage processing unit |
| CN208327624U (en) * | 2018-05-04 | 2019-01-04 | 四川兴凯歌建设工程有限公司 | A kind of ceramic membrane wastewater treatment equipment |
| CN211595273U (en) * | 2019-12-09 | 2020-09-29 | 西北华鹏建工集团有限公司 | Building sewage recovery preprocessing device |
| CN213388188U (en) * | 2020-09-15 | 2021-06-08 | 黄嘉仪 | Novel building drainage device |
-
2021
- 2021-06-24 CN CN202110704157.2A patent/CN113336363B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120046808A (en) * | 2010-10-27 | 2012-05-11 | (주)대우건설 | Cyclone type sewage disposal device for removing total phosphorus in treated sewage |
| CN105270795A (en) * | 2014-06-05 | 2016-01-27 | 深圳市安瑞科科技有限公司 | Automatic bottle-adding device |
| CN107337300A (en) * | 2017-08-26 | 2017-11-10 | 姚飞 | A kind of dyeing and printing sewage processing unit |
| CN208327624U (en) * | 2018-05-04 | 2019-01-04 | 四川兴凯歌建设工程有限公司 | A kind of ceramic membrane wastewater treatment equipment |
| CN211595273U (en) * | 2019-12-09 | 2020-09-29 | 西北华鹏建工集团有限公司 | Building sewage recovery preprocessing device |
| CN213388188U (en) * | 2020-09-15 | 2021-06-08 | 黄嘉仪 | Novel building drainage device |
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| CN113336363B (en) | 2022-04-22 |
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