CN112266146A - Marine solid-liquid separation system - Google Patents
Marine solid-liquid separation system Download PDFInfo
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- CN112266146A CN112266146A CN202011161663.3A CN202011161663A CN112266146A CN 112266146 A CN112266146 A CN 112266146A CN 202011161663 A CN202011161663 A CN 202011161663A CN 112266146 A CN112266146 A CN 112266146A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
Abstract
The invention discloses a marine solid-liquid separation system, which comprises a temporary storage tank and a separation tank, wherein a feed port is arranged on the temporary storage tank, a separation net is arranged in the separation tank, a liquid discharge gap is formed between the separation net and the separation tank, a pressure plate is arranged in the separation net, a one-way valve is arranged on the pressure plate, a pressure rod is connected to the middle position of the top of the pressure plate, a driving piece is connected to the top end of the pressure rod, a pull film is connected to the edge position of the top of the pressure plate, and the top end; the separation tank top is equipped with inhales the material mouth, inhales the material mouth and keeps in jar intercommunication, and the separation tank bottom end is equipped with the solid export, and the separation tank side is equipped with the liquid outlet. The system can extrude and separate solid-liquid mixed sewage of the ship so as to facilitate the classification treatment in the later period; can realize automatic material and the ejection of compact of inhaling through simple lift drive in the separation process, degree of automation is high, and the energy consumption is low to no matter how much solid content is in mixing the filth, the homoenergetic realizes same extrusion separation effect, very is applicable to the life filth of polymorphic type in the boats and ships.
Description
Technical Field
The invention relates to the technical field of solid-liquid separation equipment, in particular to a solid-liquid separation system for a ship.
Background
The sewage generated by the ship mainly comprises ship domestic sewage (black water), grey water and ship oily sewage, the ship domestic sewage comprises the discharge of any type of toilets and urinals and other wastes, the discharge of wash basins and wash basins of medical rooms and drain holes at the places, and the grey water refers to other sewage generated on the ship besides the black water, and mainly comprises waste water and wastes from kitchens, laundry rooms, wash rooms and the like. Thus, the ship sewage exists in the form of a solid-liquid mixture.
However, the existing ship sewage treatment system can not perform solid-liquid separation on the domestic sewage garbage firstly, but directly perform unified treatment, so that solid impurities are easy to block pipelines, the garbage is easy to deteriorate to influence subsequent treatment of ship domestic sewage, and other sewage treatment equipment is even damaged.
Disclosure of Invention
The invention aims to provide a solid-liquid separation system for a ship, which solves the problem of solid-liquid separation of a sewage mixture in a ship sewage treatment process.
The invention realizes the purpose through the following technical scheme:
a marine solid-liquid separation system comprises a temporary storage tank and a separation tank, wherein a feed port is formed in the temporary storage tank, a cylindrical separation net is arranged in the separation tank, a liquid discharge gap is formed between the separation net and the side wall of the separation tank, a pressing plate is transversely arranged in the separation net, the inside of the separation net is divided into an upper cavity and a lower cavity by the pressing plate, a plurality of one-way valves allowing the upper cavity to flow to the lower cavity in the allowed direction are arranged on the pressing plate, a pressing rod is connected to the middle position of the top of the pressing plate, the top end of the pressing rod extends out of the separation tank and is connected with a driving piece for driving the pressing rod to move up and down, a cylindrical pull film is connected to the edge position of the top of;
the separation tank top is equipped with the material mouth of inhaling with cavity intercommunication on the separation net, inhale the material mouth and pass through conveying pipeline and jar intercommunication of keeping in, the separation tank bottom end be equipped with the separation net in the solid export of cavity intercommunication down, the separation tank side be equipped with the liquid outlet of flowing back clearance intercommunication.
The improved structure of the temporary storage tank is characterized in that a crushing mechanism is arranged in the temporary storage tank and consists of a crushing motor, a rotating shaft and crushing sheets, the crushing motor is arranged on the top end of the temporary storage tank, the rotating shaft is arranged at the output end of the crushing motor, the rotating shaft stretches into the temporary storage tank downwards, and the crushing sheets are distributed in the rotating shaft.
The further improvement lies in that the driving piece is a driving motor with a toothed wheel disc, a gear rack is formed on the compression bar along the length direction, and the gear wheel disc of the driving motor is meshed and connected with the gear rack of the compression bar from the side edge.
The improved structure is characterized in that the pressing rod is composed of a first rod body, a second rod body and a pressure spring, the bottom end of the first rod body is connected with the pressing plate, the first rod body is a hollow rod body with an open top, the bottom end of the second rod body is movably inserted into the first rod body, the bottom end of the pressure spring is fixedly connected with the first rod body, and the top end of the pressure spring is fixedly connected with the second rod body.
The system is further improved in that a detection switch for detecting the bottom end distance of the second rod body is arranged at the inner bottom of the first rod body, the system further comprises a controller, a signal input end of the controller is connected with a signal output end of the detection switch, a signal output end of the controller is connected with a control end of the driving piece, and when the bottom end distance value of the second rod body detected by the detection switch is higher than a maximum preset value or lower than a minimum preset value, the controller controls the lifting driving direction of the driving piece to change.
The further improvement lies in that the solid exit is equipped with electronic gate, the control end of electronic gate is connected with the signal output part of controller, and when the second body of rod bottom distance value that detection switch detected was less than minimum default, the controller control electronic gate opened the back and immediately closed.
The one-way valve is further improved in that the one-way valve consists of a valve port arranged on the pressure plate, a spring shaft arranged on the inner edge of the valve port and a door body arranged through the spring shaft, the spring shaft has a tendency of driving the door body to rotate upwards to close, and the edge of the free end of the door body is lapped with the edge of the valve port.
A further improvement is that the separating mesh is made of a metal sheet material with meshes.
A marine solid-liquid separation method based on the system comprises the following steps:
throwing the solid-liquid mixed dirt into the temporary storage tank from the feeding port, starting the driving piece, driving the pressing rod and the pressing plate to move downwards, closing the one-way valve in the process, and increasing the space of an upper cavity in the separation net so that the solid-liquid mixed dirt in the temporary storage tank is sucked into the upper cavity through the conveying pipe under the action of negative pressure;
after the pressure plate abuts against the bottom of the separation tank, the pressure rod continues to move downwards to compress the pressure spring, when the detection switch detects that the distance value of the bottom end of the second rod body is lower than the minimum preset value, the controller controls the electric gate to be opened and then closed immediately, and then controls the driving piece to drive the pressure rod and the pressure plate to move upwards, the one-way valve is opened in the process, and solid-liquid mixed dirt in the upper cavity is discharged into the lower cavity through the one-way valve;
when the detection switch detects that the distance value of the bottom end of the second rod body is lower than the minimum preset value, the controller controls the electric gate to be opened and then immediately closed, and the solid dirt is discharged from the solid outlet, and controls the driving piece to drive the pressure rod and the pressure plate to move upwards so as to repeat the process.
The invention has the beneficial effects that: the system can extrude and separate solid-liquid mixed dirt on the ship so as to facilitate the classification treatment in the later period; can realize automatic material and the ejection of compact of inhaling through simple lift drive in the separation process, degree of automation is high, and the energy consumption is low to no matter how much solid content is in mixing the filth, the homoenergetic realizes same extrusion separation effect, very is applicable to the life filth of polymorphic type in the boats and ships.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a check valve;
FIG. 3 is a schematic structural view of the pressing rod;
in the figure: 1. a temporary storage tank; 2. a separation tank; 3. a feeding port; 4. a separation net; 5. a liquid discharge gap; 6. pressing a plate; 7. an upper cavity; 8. a lower cavity; 9. a one-way valve; 901. a valve port; 902. a spring shaft; 903. a door body; 10. a pressure lever; 101. a first rod body; 102. a second rod body; 103. a pressure spring; 104. a detection switch; 11. a drive member; 12. film drawing; 13. a material sucking port; 14. a delivery pipe; 15. a solids outlet; 16. a liquid outlet; 17. a grinding motor; 18. a rotating shaft; 19. crushing the slices; 20. a controller; 21. provided is an electric gate.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Referring to fig. 1 to 3, a marine solid-liquid separation system comprises a temporary storage tank 1 and a separation tank 2, wherein a feed inlet 3 is arranged on the temporary storage tank 1 and used for feeding solid-liquid mixed dirt, a cylindrical separation net 4 is arranged in the separation tank 2, the separation net 4 and the separation tank 2 are coaxially arranged, a liquid discharge gap 5 is formed between the separation net 4 and the side wall of the separation tank 2, a pressure plate 6 is transversely arranged in the separation net 4, the edge of the pressure plate 6 is in contact with the separation net 4, the pressure plate 6 divides the interior of the separation net 4 into an upper cavity 7 and a lower cavity 8, a plurality of one-way valves 9 allowing the upper cavity 7 to flow to the lower cavity 8 are arranged on the pressure plate 6, a pressure rod 10 is connected to the middle position of the top of the pressure plate 6, the top end of the pressure rod 10 extends out of the separation tank 2 and is connected with a driving piece 11 for driving the pressure rod 10 to move, the top end of the drawing film 12 is hermetically connected with the inner top of the separation tank 2, and the elasticity and the length of the drawing film 12 meet the requirement that the pressing plate 6 moves to the lowest end of the separation tank 2.
2 tops of knockout drum are equipped with the interior material mouth 13 of inhaling of cavity 7 intercommunication of going up of separation net 4, inhale material mouth 13 and pass through conveying pipeline 14 and the jar 1 intercommunication of keeping in, and conveying pipeline 14 stretches into the bottom of jar 1 of keeping in, 2 bottoms of knockout drum are equipped with the solid export 15 with the interior cavity 8 intercommunication down of separation net 4 for the discharge of solid filth after the separation, 2 sides of knockout drum are equipped with the liquid export 16 with flowing back clearance 5 intercommunication, the discharge that is used for liquid sewage after the separation.
According to the invention, a crushing mechanism is arranged in the temporary storage tank 1, the crushing mechanism consists of a crushing motor 17, a rotating shaft 18 and crushing sheets 19, the crushing motor 17 is arranged at the top end of the temporary storage tank 1, the rotating shaft 18 is arranged at the output end of the crushing motor 17, the rotating shaft 18 extends downwards into the temporary storage tank 1, and the crushing sheets 19 are distributed on the rotating shaft 18. The operation of the grinding motor 17 drives the rotation shaft 18 and the grinding sheet 19 to rotate, so that the dirt in the temporary storage tank 1 can be stirred, the large-sized dirt can be cut and ground, and the conveying of the dirt in the conveying pipe 14 and the subsequent solid-liquid separation can be facilitated.
In the invention, the driving part 11 is a driving motor with a toothed wheel disc, a gear rack (not shown in the figure) is formed on the compression bar 10 along the length direction, the gear disc of the driving motor is meshed and connected with the gear rack of the compression bar 10 from the side edge, and the compression bar 10 is lifted and moved by positive and negative rotation of the driving motor, so that the pressing plate 6 is driven to move in the separation net 4.
In the invention, the compression rod 10 consists of a first rod body 101, a second rod body 102 and a compression spring 103, the bottom end of the first rod body 101 is connected with the pressure plate 6, the first rod body 101 is a hollow rod body with an open top, the bottom end of the second rod body 102 is movably inserted into the first rod body 101, the bottom end of the compression spring 103 is fixedly connected with the first rod body 101, and the top end of the compression spring 103 is fixedly connected with the second rod body 102. The elastic coefficient of the pressure spring 103 is set to be larger, when the pressure lever 10 extrudes downwards, if sewage in the sewage is basically discharged, the pressure plate 6 is difficult to press downwards, or when the pressure plate 6 abuts against the inner bottom of the separation tank 2, the pressure spring 103 can be compressed by continuously pressing downwards; similarly, when the pressing rod 10 is pulled upward, the pressing spring 103 is stretched when the pressing plate 6 abuts against the inner top of the separation tank 2.
In addition, the inner bottom of the first rod 101 is provided with a detection switch 104 for detecting the bottom distance of the second rod 102, the detection switch 104 is an ultrasonic ranging sensor, an infrared ranging sensor or a photoelectric sensor, and the like, the system further comprises a controller 20, a signal input end of the controller 20 is connected with a signal output end of the detection switch 104 and is used for receiving a distance signal detected by the detection switch 104, and a signal output end of the controller 20 is connected with a control end of the driving part 11 and is used for controlling the driving part 11 to work according to the received distance signal. Specifically, when the distance value of the bottom end of the second rod 102 detected by the detection switch 104 is higher than the maximum preset value or lower than the minimum preset value, the controller 20 controls the lifting driving direction of the driving member 11 to change. The maximum preset value and the minimum preset value can be preset by the controller 20, for example, the maximum preset value is set to be 20cm, and the minimum preset value is set to be 5 cm.
Particularly, the electric gate 21 is arranged at the solid outlet 15, the control end of the electric gate 21 is connected with the signal output end of the controller 20, when the distance value of the bottom end of the second rod 102 detected by the detection switch 104 is lower than the minimum preset value, the controller 20 controls the electric gate 21 to be opened, the electric gate is immediately closed in a short time after being opened, the general opening time is 1-2s, and solid dirt can completely slide down in the time.
In the invention, the one-way valve 9 consists of a valve port 901 arranged on the pressure plate 6, a spring shaft 902 arranged at the inner edge of the valve port 901 and a door body 903 arranged through the spring shaft 902, wherein the spring shaft 902 has a tendency of driving the door body 903 to rotate upwards for closing, and the edge of the free end of the door body 903 is lapped with the edge of the valve port 901. The spring shaft 902 has a low spring constant, so that when the pressure plate 6 moves upward, it can open automatically under the action of the gravity and the pressing force of the dirt, and will not close continuously to press the dirt back into the temporary storage tank 1.
In particular, the separating screen 4 is made of a metal sheet material with mesh openings, i.e. capable of ensuring no deformation under compression.
When the system is used, the specific method comprises the following steps:
putting solid-liquid mixed dirt into the temporary storage tank 1 from the feeding port 3, starting the driving part 11, driving the pressure rod 10 and the pressure plate 6 to move downwards, closing the one-way valve 9 in the process, increasing the space of the upper cavity 7 in the separation net 4, and sucking the solid-liquid mixed dirt in the temporary storage tank 1 into the upper cavity 7 through the material conveying pipe 14 under the action of negative pressure;
after the pressure plate 6 is abutted to the inner bottom of the separation tank 2, the pressure rod 10 continues to move downwards to compress the pressure spring 103, when the detection switch 104 detects that the distance value of the bottom end of the second rod body 102 is lower than the minimum preset value, the controller 20 controls the electric gate 21 to be opened and then closed immediately, then controls the driving piece 11 to drive the pressure rod 10 and the pressure plate 6 to move upwards, the one-way valve 9 is opened in the process, and solid-liquid mixed dirt in the upper cavity 7 is discharged into the lower cavity 8 through the one-way valve 9;
after the pressure plate 6 is abutted against the inner top of the separation tank 2, the solid-liquid mixed dirt in the upper cavity 7 is completely discharged into the lower cavity 8, the pressure rod 10 continues to move upwards to stretch the pressure spring 103, when the detection switch 104 detects that the distance value of the bottom end of the second rod 102 is higher than the maximum preset value, the controller 20 controls the driving part 11 to drive the pressure rod 10 and the pressure plate 6 to move downwards, the one-way valve 9 is closed in the process, the process of sucking the solid-liquid mixed dirt is continued, and simultaneously, under the extrusion action of the pressure plate 6, the sewage in the solid-liquid mixed dirt in the lower cavity 8 is discharged to the liquid discharge gap 5 through the separation net 4 and is discharged from the liquid outlet 16, when the pressure plate 6 cannot be pressed downwards continuously after the sewage is discharged, the pressure rod 10 continues to move downwards to compress the pressure spring 103, when the detection switch 104 detects that the distance value of the bottom end of the second rod 102 is lower than the minimum preset value, the solid dirt is discharged from the solid outlet 15, and the driving part 11 is controlled to drive the pressure rod 10 and the pressure plate 6 to move upwards, so that the process is repeated, namely the pressure plate 6 is driven to move up and down in a reciprocating manner, and the dirt in the temporary storage tank 1 is continuously sucked, squeezed and separated.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (9)
1. The utility model provides a marine solid-liquid separation system, system includes temporary storage tank (1) and knockout drum (2), be equipped with dog-house (3) on temporary storage tank (1), its characterized in that: the separation tank is characterized in that a cylindrical separation net (4) is arranged in the separation tank (2), a liquid discharge gap (5) is formed between the separation net (4) and the side wall of the separation tank (2), a pressing plate (6) is transversely arranged in the separation net (4), the pressing plate (6) divides the interior of the separation net (4) into an upper cavity (7) and a lower cavity (8), a plurality of one-way valves (9) allowing the upper cavity (7) to flow to the lower cavity (8) are arranged on the pressing plate (6), a pressing rod (10) is connected to the middle position of the top of the pressing plate (6), the top end of the pressing rod (10) extends out of the separation tank (2) and is connected with a driving piece (11) for driving the pressing rod (10) to move up and down, a cylindrical pull film (12) is connected to the edge position of the top of the pressing plate (6), and the top end of the pull;
the utility model discloses a separation tank, including knockout drum (2), separation net (4), cavity (7) intercommunication are gone up on the knockout drum top and the mouth (13) are inhaled to the last cavity (7) intercommunication of separating net (2), inhale the mouth (13) and communicate with the jar (1) of keeping in through conveying pipeline (14), knockout drum (2) bottom is equipped with and separates in net (4) under the solid export (15) of cavity (8) intercommunication, knockout drum (2) side is equipped with liquid outlet (16) with flowing back clearance (5) intercommunication.
2. A marine solid-liquid separation system according to claim 1 wherein: be equipped with rubbing crusher in jar (1) of keeping in, rubbing crusher comprises crushing motor (17), pivot (18) and crushing piece (19), establish the top at jar (1) of keeping in crushing motor (17), the output of crushing motor (17) is located in pivot (18), and pivot (18) stretch into downwards in jar (1) of keeping in, it distributes on pivot (18) to smash piece (19).
3. A marine solid-liquid separation system according to claim 1 wherein: the driving piece (11) is a driving motor with a toothed wheel disc, a gear rack is formed on the pressing rod (10) along the length direction, and the gear wheel disc of the driving motor is meshed with the gear rack of the pressing rod (10) from the side edge.
4. A marine solid-liquid separation system according to claim 1 wherein: depression bar (10) comprise the first body of rod (101), the second body of rod (102) and pressure spring (103), the first body of rod (101) bottom is connected with clamp plate (6), and just the first body of rod (101) is the open-top hollow body of rod, the bottom activity of the second body of rod (102) is inserted inside the first body of rod (101), pressure spring (103) bottom and first body of rod (101) fixed connection, pressure spring (103) top and the second body of rod (102) fixed connection.
5. The marine solid-liquid separation system of claim 4, wherein: the interior bottom department of the first body of rod (101) is equipped with detection switch (104) that are used for detecting second body of rod (102) bottom distance, the system still includes controller (20), the signal input part of controller (20) is connected with the signal output part who detects switch (104), and the signal output part of controller (20) is connected with the control end of driving piece (11), and when the second body of rod (102) bottom distance value that detects switch (104) is higher than the biggest default or is less than the minimum default, the lift drive direction change of driving piece (11) is controlled in controller (20).
6. The marine solid-liquid separation system of claim 5, wherein: the solid outlet (15) is provided with an electric gate (21), the control end of the electric gate (21) is connected with the signal output end of the controller (20), and when the distance value of the bottom end of the second rod body (102) detected by the detection switch (104) is lower than the minimum preset value, the controller (20) controls the electric gate (21) to be opened and then immediately closed.
7. A marine solid-liquid separation system according to claim 1 wherein: the check valve (9) is composed of a valve port (901) arranged on the pressure plate (6), a spring shaft (902) arranged on the inner edge of the valve port (901), and a door body (903) installed through the spring shaft (902), the spring shaft (902) has a tendency of driving the door body (903) to rotate upwards to close, and the edge of the free end of the door body (903) is overlapped with the edge of the valve port (901).
8. A marine solid-liquid separation system according to claim 1 wherein: the separating net (4) is made of a metal plate material with meshes.
9. A marine solid-liquid separation method based on the system of claim 6, characterized in that: comprises the steps of
Putting solid-liquid mixed dirt into the temporary storage tank (1) from the feeding port (3), starting the driving piece (11), driving the pressing rod (10) and the pressing plate (6) to move downwards, closing the one-way valve (9) in the process, and increasing the space of the upper cavity (7) in the separation net (4) so that the solid-liquid mixed dirt in the temporary storage tank (1) is sucked into the upper cavity (7) through the conveying pipe (14) under the action of negative pressure;
after the pressure plate (6) is abutted to the inner bottom of the separation tank (2), the pressure rod (10) continues to move downwards to compress the pressure spring (103), when the detection switch (104) detects that the distance value of the bottom end of the second rod body (102) is lower than the minimum preset value, the controller (20) controls the electric gate (21) to be opened and then immediately closed, then controls the driving piece (11) to drive the pressure rod (10) and the pressure plate (6) to move upwards, the one-way valve (9) is opened in the process, and solid-liquid mixed dirt in the upper cavity (7) is discharged into the lower cavity (8) through the one-way valve (9);
after the pressing plate (6) is abutted against the inner top of the separation tank (2), solid-liquid mixed dirt in the upper cavity (7) is completely discharged into the lower cavity (8), the pressing rod (10) continues to move upwards to stretch the pressing spring (103), when the detection switch (104) detects that the distance value of the bottom end of the second rod body (102) is higher than the maximum preset value, the controller (20) controls the driving piece (11) to drive the pressing rod (10) and the pressing plate (6) to move downwards, the one-way valve (9) is closed in the process, the process of sucking the solid-liquid mixed dirt is continued, and simultaneously under the extrusion action of the pressing plate (6), sewage in the solid-liquid mixed dirt in the lower cavity (8) is discharged to the liquid discharge gap 5 through the separation net 4 and is discharged through the liquid outlet (16), when the pressing plate (6) cannot continue to press downwards after the sewage is discharged, the pressing rod (10) continues to move downwards to compress the pressing spring (103), when the detection switch (104) detects that the distance value of the bottom end of the second rod body (102) is lower than the minimum preset value, the controller (20) controls the electric gate (21) to be opened and then immediately closed, solid dirt is discharged from the solid outlet (15), and the driving piece (11) is controlled to drive the pressing rod (10) and the pressing plate (6) to move upwards, so that the process is repeated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161663.3A CN112266146A (en) | 2020-10-27 | 2020-10-27 | Marine solid-liquid separation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011161663.3A CN112266146A (en) | 2020-10-27 | 2020-10-27 | Marine solid-liquid separation system |
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| CN112266146A true CN112266146A (en) | 2021-01-26 |
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| CN202011161663.3A Pending CN112266146A (en) | 2020-10-27 | 2020-10-27 | Marine solid-liquid separation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113421772A (en) * | 2021-07-19 | 2021-09-21 | 北京中科特磁科技有限公司 | Pipettor for preparing manganese zinc ferrite thin film material |
| CN115093092A (en) * | 2022-06-20 | 2022-09-23 | 中建七局交通建设有限公司 | Waste slurry dewatering device based on filter bag method |
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| CN102269322A (en) * | 2011-01-20 | 2011-12-07 | 于雅群 | Hydrate collecting and packing equipment |
| CN208758317U (en) * | 2018-06-29 | 2019-04-19 | 江苏阳光朗洁物业管理集团有限公司 | A kind of classification treatment device for household garbage |
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