CN115340214A - Solid-liquid separation method, device and system - Google Patents

Solid-liquid separation method, device and system Download PDF

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Publication number
CN115340214A
CN115340214A CN202210999246.9A CN202210999246A CN115340214A CN 115340214 A CN115340214 A CN 115340214A CN 202210999246 A CN202210999246 A CN 202210999246A CN 115340214 A CN115340214 A CN 115340214A
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China
Prior art keywords
solid
liquid separation
tank
cavity
separation cavity
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CN202210999246.9A
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Chinese (zh)
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左嘉扬
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Individual
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D36/00—Filter circuits or combinations of filters with other separating devices
    • B01D36/04—Combinations of filters with settling tanks
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • 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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56—Macromolecular compounds
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The invention provides a solid-liquid separation method, a solid-liquid separation device and a solid-liquid separation system, and belongs to the technical field of solid-liquid separation equipment. The solid-liquid separation method comprises the following steps: the method comprises the following steps: feeding the material into a solid-liquid separation cavity and then sealing; the solid-liquid separation cavity is arranged in the vertical direction, and valves are arranged at the upper end and the lower end of the solid-liquid separation cavity; step two: pumping solid waste into the solid-liquid separation cavity, so that water enters the filtering device under the extrusion pressure of the solid waste and is discharged from the water outlet; step three: performing vacuum suction filtration on the materials in the solid-liquid separation cavity; step four: vibrating and tamping the materials in the solid-liquid separation cavity; step five: and opening a valve below the solid-liquid separation cavity to discharge solid waste. The solid-liquid separation tank is arranged in the vertical direction, the tank body is connected with a feeding filter-press pump, a vacuum filter-suction system, an air compressor and other equipment, and the multi-step solid-liquid separation of materials in the tank body is realized, so that the effect of reducing the water content of solid waste is realized.

Description

Solid-liquid separation method, device and system
Technical Field
The invention belongs to the technical field of solid-liquid separation equipment, and particularly relates to a solid-liquid separation method, a solid-liquid separation device and a solid-liquid separation system.
Background
The filter press is a device for performing solid-liquid separation on materials through pressure filtration, is widely applied to industries such as food, chemical industry, environmental protection, sewage treatment and the like, and particularly has unique superiority on separation of fine and viscous substances. For example, sludge produced in chemical and domestic sewage treatment has high water content and must be dewatered to reduce volume before being discharged. The filter press is mainly used for chemical production, such as chemical industry, pharmacy, ceramic industry and the like, has the characteristics of stable performance, convenient operation, safety, time and labor saving and the like, and has the main function of separating and extracting solid and liquid in mixed liquid to realize the effect of solid-liquid separation.
The existing filter presses in the market are various, including plate and frame type filter presses, belt type filter presses, etc., and the existing filter presses in the market can not perform secondary solid-liquid separation on the material in the process of performing solid-liquid separation on the material, and generally perform solid-liquid separation in one way, for example: the vacuum suction filter can only use one mode to separate solid from liquid, and has limitation to the treated materials. Another example is: the plate-and-frame filter press is also applied to the field in practice in a mode for carrying out solid-liquid separation, so that the water content of solid waste cannot be further reduced when the solid-liquid separation is carried out on materials with special requirements.
Disclosure of Invention
The invention provides a solid-liquid separation method, a solid-liquid separation device and a solid-liquid separation system, which are integrated into a whole through multiple filtering modes, so as to solve the technical problem of reducing the water content of solid waste.
In order to achieve the purpose, the technical solution of the invention is as follows:
a solid-liquid separation method comprising the steps of:
the method comprises the following steps: opening an upper valve of the solid-liquid separation cavity, feeding the materials into the solid-liquid separation cavity, and sealing;
the solid-liquid separation cavity is arranged in the vertical direction, and valves are arranged at the upper end and the lower end of the solid-liquid separation cavity;
step two: pumping solid waste into the solid-liquid separation cavity by using a feeding filter-press pump, so that water enters the filter device and is discharged from a water outlet under the extrusion pressure of the solid waste;
step three: performing vacuum suction filtration on the materials in the solid-liquid separation cavity;
step four: vibrating and tamping the materials in the solid-liquid separation cavity;
step five: and opening a valve below the solid-liquid separation cavity, and discharging solid waste.
Preferably, the fourth step is preceded by the following steps:
and (4) performing air penetration on the material in the solid-liquid separation cavity through the anti-backflow air blowing valve.
Preferably, before the material is fed into the solid-liquid separation chamber in the first step, the following treatment is further performed on the material:
adding NaOH into the wastewater to adjust the pH value, and adding PAC and PAM step by step to perform coagulation reaction and flocculation reaction;
and (3) pumping the wastewater into the main tank for precipitation, discharging supernatant, precipitating the precipitate below in a conical tank below the main tank, and then entering the solid-liquid separation cavity according to the steps.
Preferably, the filtering device in the second step is annular, the solid-liquid separation cavity is arranged in the middle of the annular filtering device, water of the material is discharged from the inside to the outside under the pressure to achieve the purpose of solid-liquid separation, and when the pressure in the solid-liquid separation cavity reaches a set value, the pumping of the solid waste is stopped.
Preferably, in the third step, residual water in the material is sucked out of the filtering device by using a vacuum suction filtering system, and the suction filtering is repeated for multiple times.
Preferably, in the fourth step, the compressed air in the air storage tank is sent to the solid-liquid separation chamber, so that the water-gas mixture enters the vacuum suction filtration system through the filtration device.
Preferably, the fifth step further includes blowing high-pressure gas into the solid-liquid separation cavity by using the backflow-preventing gas blowing valve, so that solid waste in the solid-liquid separation cavity can be discharged quickly and cleanly.
The invention also provides a solid-liquid separation device, which comprises
A main tank, a cone tank is connected below the main tank,
the solid-liquid separation tank is connected below the conical tank through an upper valve, and a lower valve is arranged below the solid-liquid separation tank;
a vertically arranged solid-liquid separation cavity is arranged in the solid-liquid separation tank, and a filtering device is arranged at the periphery of the solid-liquid separation cavity; the solid-liquid separation tank is connected with a feed filter-pressing pump through a feed inlet, and solid wastes are pumped into the solid-liquid separation cavity; the solid-liquid separation tank is connected with an air storage tank of the air compressor through an air inlet; the solid-liquid separation tank is also provided with a water outlet which is connected with the vacuum suction filtration system; the two sides of the solid-liquid separation tank are connected with vibration hammers.
Preferably, the filtering device comprises a filter cloth and a filter plate, the filter plate is annular, and the filter cloth is fixed on the inner side surface of the filter plate.
The invention also provides a control system of the solid-liquid separation device, which comprises the solid-liquid separation device.
The beneficial effects of the invention are:
the solid-liquid separation tank is arranged in the vertical direction, and the tank body is connected with a feeding filter-press pump, a vacuum filter-suction system, an air compressor, an air storage tank and other equipment, so that the multi-step solid-liquid separation of materials in the tank body is realized, and the effect of reducing the water content of solid waste is realized.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
FIG. 2 is a schematic structural view of a solid-liquid separation tank.
FIG. 3 is a schematic sectional view of a solid-liquid separation tank.
FIG. 4 is a schematic top view of a solid-liquid separation tank.
Fig. 5 is a schematic view of the structure of the main tank.
In the figure: 1. a main tank; 2. a conical tank; 3. a solid-liquid separation tank; 4. an upper valve; 5. a lower valve; 6. a solid-liquid separation chamber; 7. filtering cloth; 8. filtering the plate; 9. a feed inlet; 10. an air inlet; 11. a water discharge port; 12. and (5) vibrating the hammer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Example 1
Referring to fig. 1, a solid-liquid separation method includes the steps of:
the method comprises the following steps: feeding the materials into a solid-liquid separation cavity and then sealing;
the solid-liquid separation chamber is arranged in a vertical direction, valves are arranged at the upper end and the lower end of the solid-liquid separation chamber, the valves are controlled to be opened and closed by a PLC control system, when materials enter the solid-liquid separation chamber, the upper valve is opened, the lower valve is closed, when the materials in the solid-liquid separation chamber reach a preset value, the upper valve is closed, the materials are stopped being conveyed, and at the moment, the solid-liquid separation tank is in a sealed state; the valves may be electrically, pneumatically, hydraulically actuated, or the like.
Step two: pumping solid waste into the solid-liquid separation cavity by using a feed pressure filter pump, so that water enters the filter device under the extrusion pressure of the solid waste and is discharged from a water outlet;
the solid-liquid separation tank is provided with a feed inlet, the feed inlet is connected with a feeding filter-pressing pump, water-containing solid waste is pumped into the solid-liquid separation cavity through a material pump, the water-containing solid waste continuously enters the solid-liquid separation cavity, so that the original material in the solid-liquid separation cavity is under pressure, the water in the material seeps out from the filter cloth in the filter device and flows out through the gap of the filter plate, the purpose of solid-liquid separation is achieved, when the set pressure is reached in the solid-liquid separation cavity, the feeding filter-pressing pump is stopped, and the step realizes the solid-liquid separation of the first step. Furthermore, the filtering device is annular, a filter cloth layer and a filter plate layer are sequentially arranged from inside to outside, the filter cloth is fixed on the filter plate, the solid-liquid separation cavity is arranged in the middle of the annular filtering device, and water of the materials is discharged from inside to outside under pressure, so that the purpose of solid-liquid separation is achieved.
Step three: performing vacuum suction filtration on the materials in the solid-liquid separation cavity;
the solid-liquid separation tank is provided with a water outlet which is connected with the vacuum suction filtration system, residual water in the material enters the vacuum tank in the vacuum suction filtration system from the gap of the filter plate through the filter cloth, the suction filtration can be repeated for many times according to actual conditions, the vacuum suction filtration system is stopped, the water in the vacuum tank is discharged in time, and the solid-liquid separation of the second step is realized.
Step four: and (4) performing air penetration on the material in the solid-liquid separation cavity.
And the solid-liquid separation tank is provided with an air inlet which is provided with an anti-backflow air blowing valve, the anti-backflow air blowing valve is connected with an air storage tank of the screw air compressor, when solid-liquid separation is carried out, the anti-backflow air blowing valve is opened, compressed air enters the solid-liquid separation cavity, residual moisture in the material flows out along with air, a water-gas mixture flows into a water outlet from a gap of a filter plate through filter cloth, water and gas are discharged through the vacuum tank, and the solid-liquid separation in the third step is realized.
Step five: vibrating and tamping the materials in the solid-liquid separation cavity;
the solid-liquid separation tank is connected with a vibration hammer, and the vibration hammer vibrates for a long time at a frequency of less than 100 times per minute during solid-liquid separation so as to tamp the solid wastes in the cone tank connected between the solid-liquid separation cavity and the lower part of the main tank.
Step six: and opening a valve below the solid-liquid separation cavity to discharge solid waste.
After the water content of the solid waste meets the specified standard, the lower valve is opened, and meanwhile, the anti-backflow air blowing valve can be opened to blow high-pressure gas into the solid-liquid separation cavity, so that the solid waste in the solid-liquid separation cavity can be quickly and cleanly discharged.
And after the solid waste is discharged, closing the lower valve, opening the upper valve, and performing the next solid-liquid separation circulating operation.
All actions of the solid-liquid separation method are controlled and implemented by the PLC, and the device can run repeatedly and circularly to realize the self-running of the device.
Further, before the material is sent to the solid-liquid separation chamber in the first step, the following treatment is further performed on the material:
adding NaOH into the wastewater to be treated to adjust the pH value, and adding PAC and PAM step by step to perform coagulation reaction and flocculation reaction; in actual operation, the types of the added medicaments can be selected according to the actual condition of the material;
and pumping the reacted wastewater into the main tank for precipitation, wherein the sewage to be treated entering the main tank reacts due to the addition of the medicament, and the solid waste coagulated masses quickly sink to the lower part of the conical tank connected with the main tank. Clear water at the upper part of the main tank naturally flows out, and then can be recycled or discharged to discharge supernatant, and sediment materials at the lower part are sent into the solid-liquid separation cavity.
The solid-liquid separation method can be adjusted according to the actual condition of the material, and one solid-liquid separation method can achieve ideal water content and only adopts one of filter pressing, vacuum suction filtration and air penetration filtration. If the solid-liquid separation is carried out by two or more methods, the water content is lower. Taking stone cutting processing as an example: the best effect of the solid-liquid separation is that the water content of the solid waste is about 28 percent by adopting the existing frame plate filter pressing, and the water content can be reduced to below 20 percent by adopting the method for carrying out the solid-liquid separation.
Example 2
Referring to FIGS. 2 to 5, a solid-liquid separating apparatus comprises
The device comprises a main tank 1, wherein a conical tank 2 is connected below the main tank 1, when the main tank 1 is subjected to sedimentation, sediments enter the conical tank 2, and supernate is discharged from the main tank 1;
the solid-liquid separation tank 3 is connected below the conical tank 2 through an upper valve 4, and a lower valve 5 is arranged below the solid-liquid separation tank 3; the opening and closing of the upper valve 4 and the lower valve 5 are controlled by a PLC control system.
A solid-liquid separation cavity 6 which is vertically arranged is arranged in the solid-liquid separation tank 3, and a filtering device is arranged at the periphery of the solid-liquid separation cavity 6; the solid-liquid separation tank 3 is connected with a feed filter-pressing pump through a feed inlet 9, and solid waste is pumped into the solid-liquid separation cavity 6; the solid-liquid separation tank 3 is connected with a screw air compressor through an air inlet 10; the solid-liquid separation tank 3 is also provided with a water outlet 11, and the water outlet 11 is connected with a vacuum suction filtration system; vibration hammers 12 are connected to both sides of the solid-liquid separation tank 3.
Furthermore, the filtering device comprises a filter cloth 7 and a filter plate 8, the filter plate 8 is ring-shaped, and the filter cloth 7 is fixed on the inner side surface of the filter plate 8. During installation, the filter cloth 7 is nailed on a filter plate 8 made of PP plastics by wood screws, and then the composite of the nailed filter cloth 7 and the filter plate 8 is installed on a steel outer ring of the solid-liquid separation chamber 6 by bolts. The filter cloth 7 and the filter plate 8 are those commonly used in the art.
Example 3
A control system of a solid-liquid separation device comprises the solid-liquid separation device.
Specifically, the control system comprises a PLC control system and the device connected with the PLC control system, and the operation of the device is controlled by the PLC control system to realize full-automatic operation. And the remote industrial internet module can be used for carrying out remote operation and monitoring on the PLC system, and the whole-process intellectualization and the network interconnection of the sewage treatment are realized.
The control system described above controls the following processes:
when wastewater to be treated flows in a ditch or a water pipe, the water level switch 1 is triggered, the water level switch 1 sends a signal to the PLC control system, the dosing devices are started, prepared medicaments such as NaOH, PAC and PAM are sequentially added into the wastewater to be treated, and the distance between every two dosing devices needs to be preset so as to prevent the medicaments from reacting too late and generate no due effect to influence the operation of subsequent equipment.
After the water to be treated finishes the reaction, the No. 2 water level switch is triggered, the PLC control system starts the water pump, and the sewage to be treated mixed with the medicament is pumped into the main tank.
The sewage to be treated of the mixed medicament entering the main tank reacts due to the addition of the medicament, and the solid waste coagulated masses quickly sink to the lower part of the main tank connecting cone. Clear water at the upper part of the main tank naturally flows out, and can be recycled or discharged outside.
The solid waste sediment material is connected with the lower part of the cone body in the main tank, when the height reaches a set height, the sensor sends a signal to the PLC control system, the upper valve is opened, the solid waste material connected with the lower part of the cone body in the main tank enters the solid-liquid separation cavity under the pressure formed by the height of the main tank, and when the set feeding time is up, the upper valve is closed, and the lower valve is still closed.
The PLC control system controls and starts the feeding filter-pressing pump, water-containing solid waste is added into the solid-liquid separation cavity for filter pressing to achieve the purpose of solid-liquid separation, then the vacuum filter-sucking system is started, residual water in the solid waste is sucked into the vacuum filter-sucking tank from gaps of the filter plates through filter cloth, the backflow-preventing air blowing valve is opened, high-pressure air is pressed into the solid-liquid separation cavity, residual water in the solid waste flows into the vacuum filter-sucking tank along with air outflow, the vibration hammer is started and vibrates for a long time at the frequency of less than 100 times per minute all the time, after the solid-liquid separation achieves the expected effect, the lower valve is started, and meanwhile, the backflow-preventing air blowing valve is opened to blow high-pressure air to the solid-liquid separation cavity, so that the solid waste can be rapidly and cleanly discharged. After the draining, the lower valve is closed.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes performed by the present invention or directly or indirectly applied to other related technical fields are included in the scope of the present invention.

Claims (10)

1. A solid-liquid separation method is characterized by comprising the following steps:
the method comprises the following steps: opening an upper valve of the solid-liquid separation cavity, feeding the materials into the solid-liquid separation cavity, and sealing;
the solid-liquid separation cavity is arranged in the vertical direction, and valves are arranged at the upper end and the lower end of the solid-liquid separation cavity;
step two: pumping solid waste into the solid-liquid separation cavity by using a feed pressure filter pump, so that water enters the filter device under the extrusion pressure of the solid waste and is discharged from a water outlet;
step three: performing vacuum suction filtration on the materials in the solid-liquid separation cavity;
step four: vibrating and tamping the materials in the solid-liquid separation cavity;
step five: and opening a valve below the solid-liquid separation cavity, and discharging solid waste.
2. The solid-liquid separation method according to claim 1, characterized by further comprising, before the fourth step, the steps of:
and (4) performing air penetration filtration on the materials in the solid-liquid separation cavity through the anti-backflow air blowing valve.
3. The solid-liquid separation method according to claim 1, wherein before the material is fed into the solid-liquid separation chamber in the first step, the method further comprises the following steps:
adding NaOH into the wastewater to adjust the pH value, and adding PAC and PAM step by step to perform coagulation reaction and flocculation reaction;
and (3) pumping the wastewater into the main tank for precipitation, discharging supernatant, precipitating the precipitate below in a conical tank below the main tank, and then entering the solid-liquid separation cavity according to the steps.
4. A solid-liquid separation method according to any one of claims 1 to 3, wherein the filtering device in the second step is annular, the solid-liquid separation chamber is arranged in the middle of the annular filtering device, water in the material is discharged from the inside to the outside under pressure to achieve the purpose of solid-liquid separation, and when the pressure in the solid-liquid separation chamber reaches a set value, pumping of the solid waste is stopped.
5. The solid-liquid separation method according to claim 4, wherein in the third step, residual water in the material is sucked out of the filtering device by using a vacuum suction filtering system, and the suction filtering is repeated for multiple times.
6. The solid-liquid separation method according to claim 5, wherein in the fourth step, the compressed air in the air storage tank is sent to the solid-liquid separation chamber, so that the water-gas mixture enters the vacuum suction filtration system through the filtration device.
7. The solid-liquid separation method according to claim 6, wherein the fifth step further comprises blowing high-pressure gas into the solid-liquid separation chamber by using the backflow-preventing gas blowing valve, so that the solid waste in the solid-liquid separation chamber can be rapidly and cleanly discharged.
8. A solid-liquid separation device is characterized by comprising
A main tank, a cone tank is connected below the main tank,
the solid-liquid separation tank is connected below the conical tank through an upper valve, and a lower valve is arranged below the solid-liquid separation tank;
a vertically arranged solid-liquid separation cavity is arranged in the solid-liquid separation tank, and a filtering device is arranged at the periphery of the solid-liquid separation cavity; the solid-liquid separation tank is connected with a feed filter-pressing pump through a feed inlet, and solid wastes are pumped into the solid-liquid separation cavity; the solid-liquid separation tank is connected with an air storage tank of the air compressor through an air inlet; the solid-liquid separation tank is also provided with a water outlet which is connected with the vacuum suction filtration system; the two sides of the solid-liquid separation tank are connected with vibration hammers.
9. The solid-liquid separation device according to claim 8, wherein the filter means comprises a filter cloth and a filter plate, the filter plate having a ring shape, the filter cloth being fixed to an inner side surface of the filter plate.
10. A control system for a solid-liquid separation apparatus, characterized by comprising the solid-liquid separation apparatus according to claim 8.
CN202210999246.9A 2022-08-19 2022-08-19 Solid-liquid separation method, device and system Withdrawn CN115340214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210999246.9A CN115340214A (en) 2022-08-19 2022-08-19 Solid-liquid separation method, device and system

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Application Number Priority Date Filing Date Title
CN202210999246.9A CN115340214A (en) 2022-08-19 2022-08-19 Solid-liquid separation method, device and system

Publications (1)

Publication Number Publication Date
CN115340214A true CN115340214A (en) 2022-11-15

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CN202210999246.9A Withdrawn CN115340214A (en) 2022-08-19 2022-08-19 Solid-liquid separation method, device and system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117101264A (en) * 2023-10-13 2023-11-24 深圳市林科超声波洗净设备有限公司 Waste water filtering system of cleaning machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117101264A (en) * 2023-10-13 2023-11-24 深圳市林科超声波洗净设备有限公司 Waste water filtering system of cleaning machine

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Application publication date: 20221115