Novel micro-nano bubble rotational flow filtering system

Abstract

The utility model provides a novel micro-nano bubble rotational flow filtering system. The novel micro-nano bubble rotational flow filtering system comprises a rotational flow filter, a mixer, a micro-nano bubble generator, a stabilizer and a dissolved air pump, water inlets are tangentially formed in the two sides of the upper end of the barrel body, an oil collecting micro-cavity is further formed in the inner wall of the upper end of the barrel body, and an oil discharging pipe is arranged in the oil collecting micro-cavity and used for discharging oil dirt; and the upper sealing head is also provided with an exhaust port. Light-phase oil stains in sewage can be effectively separated and enriched through the rotational flow air flotation effect, the sump oil recovery efficiency is improved, the micro-nano bubble technology and the dissolved air pump are combined for use, the oil-water separation effect can be enhanced, dissolved oxygen in water can be effectively removed, and favorable conditions are created for follow-up anaerobic treatment or other processes sensitive to oxygen; due to the special property of the micro-nano bubbles, the micro-nano bubbles can be adhered to the surface of the filter element and the interface of the filter element and liquid, the filter element is automatically cleaned through physical action, dirt accumulation is reduced, and the service life and the maintenance period of the filter element are remarkably prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a novel micro-nano bubble cyclone filtering system. Background Art

[0002] In the current water treatment field, treating oily wastewater and other wastewater containing suspended solid impurities is a challenging task. Although a number of technologies have been applied to wastewater treatment, such as traditional cyclone separation, filtration technology, and flotation technology, these technologies still face a series of problems and limitations in practical applications. For example, traditional cyclone separators may be inefficient in treating emulsified oil and fine suspended matter, resulting in excessive oil content in the effluent. The filtration system often encounters filter element clogging problems, requiring frequent maintenance and replacement, which not only increases operating costs, but also affects treatment efficiency. In addition, existing technologies are also insufficient in deoxygenation, desulfurization, and automated control, making it difficult to meet the standards of high efficiency, continuous operation, and environmentally friendly emissions.

[0003] Deficiencies of existing technology:

[0004] 1. Low oil-water separation efficiency: Conventional sewage treatment systems often have low separation efficiency when dealing with emulsified oil and tiny suspended particles, resulting in substandard final effluent quality.

[0005] 2. Frequent filter element maintenance: The filter element in the filter unit is easily contaminated and clogged, and requires periodic cleaning and replacement, which increases maintenance costs and system downtime.

[0006] 3. Insufficient automation level: The lack of efficient automated control systems to accurately adjust system operating parameters, such as liquid level, flow and pressure control, results in the treatment process being dependent on manual intervention, unstable and inefficient.

[0007] 4. Single oil removal and deoxygenation functions: Existing technologies have limited capabilities in achieving efficient oil removal, deoxygenation and removal of other pollutants at the same time, especially in complex water treatment scenarios.

[0008] 5. Imperfect backwash system: The backwash mechanism design is not efficient enough and fails to fully utilize system resources, resulting in unsatisfactory cleaning results and incomplete filter element cleaning.

[0009] Therefore, the prior art has deficiencies and needs further improvement. Utility Model Content

[0010] In view of the problems existing in the prior art, the utility model provides a novel micro-nano bubble cyclone filtration system.

[0011] To achieve the above purpose, the specific scheme of the utility model is as follows:

[0012] The utility model provides a novel micro-nano bubble cyclone filtration system, comprising:

[0013] Cyclone filter, mixer, micro-nano bubble generator, stabilizer, air dissolving pump;

[0014] The cyclone filter comprises: a cylinder, an upper head and a lower head;

[0015] The upper head and the lower head are respectively arranged at the upper end and the lower end of the cylinder;

[0016] The upper part of the cylinder is a cyclone oil removal area and the lower part is a filtration area;

[0017] Water inlets are tangentially arranged on both sides of the upper end of the cylinder.

[0018] An oil collecting micro-cavity is also provided on the inner wall of the upper end of the cylinder, and an oil drain pipe is provided in the oil collecting micro-cavity for draining oil dirt;

[0019] The upper cover is also provided with an exhaust port;

[0020] The water inlet is connected to the outlet of the mixer, the inlet of the micro-nano bubble generator is connected to the outlet of the stabilization tank, and the outlet of the micro-nano bubble generator is connected to the mixer;

[0021] The inlet of the stabilization tank is connected to the outlet of the dissolved air pump;

[0022] After the oily wastewater and the water treated by the micro-nano bubble generator are mixed in the mixer, the water flows into the cyclone oil removal area of ​​the cylinder in a tangential manner from the water inlet to produce a cyclone flotation effect, thereby enhancing the separation and recovery efficiency of the waste oil;

[0023] The lower end of the cylinder is located in the filtering area and is also provided with a plurality of filter elements for filtering solid impurities;

[0024] A water outlet is also arranged on the side wall of the lower end of the cylinder.

[0025] Furthermore, the cyclone oil removal zone of the cylinder is also provided with a dissolved air water outlet, which is connected to the inlet of a dissolved air pump, and the dissolved air pump is used to dissolve gas in the liquid;

[0026] The dissolved air pump dissolves oxygen-free gas and mixes it with the oily wastewater, promoting the transfer of oxygen in the water into the gas, which is discharged through the exhaust port to achieve a deoxygenation effect.

[0027] Furthermore, a dissolved air water inlet is also provided on the side wall of the lower head;

[0028] The dissolved air water inlet is also connected to the outlet of the micro-nano bubble generator.

[0029] Furthermore, a backwash water outlet is provided on the lower side of the lower head for discharging the water after cleaning the filter element.

[0030] Furthermore, the filter element is a hydrophilic sintered filter element.

[0031] Furthermore, partition plates are provided on the upper side and the lower side of the filter element.

[0032] Furthermore, the water outlet is also the backwash water inlet, and clean water is injected through the backwash water inlet to clean the filter element.

[0033] Furthermore, the particle size of the micro-nano bubbles generated by the micro-nano bubble generator is between 0.1-100 microns, preferably 0.1-30 microns. The micro-nano bubbles adhere to the surface of the filter element and the interface membrane between the filter element and the liquid, clean the filter element, and extend the maintenance cycle.

[0034] Furthermore, a first control valve is provided on the oil drain pipe, and a first liquid level gauge is provided in the oil collecting microcavity; the first liquid level gauge is connected to the first control valve and is used to control the oil drain pipe to drain oil;

[0035] A second control valve is provided on the water outlet, and a second liquid level gauge is provided on the cylinder in the cyclone oil removal area; the second liquid level gauge is connected to the second control valve for controlling water discharge.

[0036] Furthermore, a third control valve is provided on the exhaust port, and a pressure transmitter is also provided on the upper cover, and the pressure transmitter is connected to the third control valve for controlling the exhaust of the exhaust port.

[0037] The technical solution of the utility model has the following beneficial effects:

[0038] 1. Efficient oil-water separation and waste oil recovery: Through the cyclone flotation effect, the system can effectively separate and enrich the light phase oil in the sewage, improve the waste oil recovery efficiency and reduce environmental pollution.

[0039] 2. Deep oil removal and deoxygenation capabilities: The combination of micro-nano bubble technology and dissolved air pump can not only enhance the oil-water separation effect, but also effectively remove dissolved oxygen in the water, creating favorable conditions for subsequent anaerobic treatment or other oxygen-sensitive processes.

[0040] 3. Self-cleaning filter element and extended maintenance cycle: The special properties of micro-nano bubbles (particle size between 0.1-100 microns, optimally 0.1-30 microns) enable them to adhere to the surface of the filter element and the interface between the filter element and the liquid, automatically cleaning the filter element through physical action, reducing dirt accumulation, and significantly extending the service life of the filter element and the maintenance cycle.

[0041] 4. Intelligent control and automatic adjustment: The system is equipped with precise level gauges, pressure transmitters and multi-point control valves to achieve precise control of oil discharge, water discharge and exhaust, ensuring stable system operation, while optimizing the operating process and reducing the need for human intervention.

[0042] 5. Optimize the backwash process: The unique backwash structure, including the dissolved air water inlet and backwash water outlet of the lower head, and the filter element partition plate, makes the backwashing more efficient and thorough, helps to quickly restore the filter element performance and maintain the filtration efficiency.

[0043] 6. Integrated design improves treatment efficiency: The system integrates cyclone separation, micro-nano bubble generation, filtration, oil removal, deoxygenation, desulfurization, backwashing and automatic control. The highly integrated design greatly improves the overall efficiency and reliability of sewage treatment.

[0044] 7. Strong adaptability: The use of hydrophilic sintered filter element enhances the filtering ability of solid impurities in complex water quality, broadens the application scope of the system, and is suitable for treating various types of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of the utility model.

[0046] In the figure:

[0047] 1. Mixer; 2. Micro-nano bubble generator; 3. Stabilizer; 4. Air dissolving pump;

[0048] 5. Cylinder; 6. Upper head; 7. Lower head;

[0049] 8. Water inlet;

[0050] 9. Oil collecting micro-cavity;

[0051] 10. Oil drain pipe; 11. First control valve; 12. First liquid level gauge;

[0052] 13. Exhaust port; 14. Third control valve; 15. Pressure transmitter;

[0053] 16. Filter element;

[0054] 17. Water outlet / backwash water inlet; 18. Second control valve; 19. Second liquid level gauge;

[0055] 20. Dissolved air water outlet;

[0056] 21. Dissolved air water inlet;

[0057] 22. Backwash water outlet;

[0058] 23. Partition panel. DETAILED DESCRIPTION

[0059] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0060] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0062] In the description of this embodiment, the terms "upper", "lower", "front", "back", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0063] like Figure 1 As shown, the utility model provides a novel micro-nano bubble cyclone filtration system, comprising: a cyclone filter, a mixer 1, a micro-nano bubble generator 2, a stabilizer 3, and an air dissolving pump 4;

[0064] The cyclone filter comprises: a cylinder 5, an upper head 6, and a lower head 7;

[0065] The upper head 6 and the lower head 7 are respectively arranged at the upper end and the lower end of the cylinder 5;

[0066] The upper part of the cylinder 5 is a cyclone oil removal area and the lower part is a filtration area;

[0067] Water inlets 8 are tangentially arranged on both sides of the upper end of the cylinder 5.

[0068] An oil collecting micro-cavity 9 is also provided on the inner wall of the upper end of the cylinder 5, and an oil drain pipe 10 is provided in the oil collecting micro-cavity 9 for draining oil dirt;

[0069] The upper head 6 is also provided with an exhaust port 13;

[0070] The water inlet 8 is connected to the outlet of the mixer 1, the inlet of the micro-nano bubble generator 2 is connected to the outlet of the stabilization tank, and the outlet of the micro-nano bubble generator 2 is connected to the mixer 1;

[0071] The inlet of the stabilization tank is connected to the outlet of the dissolved air pump 4;

[0072] After the oily wastewater and the water treated by the micro-nano bubble generator 2 are mixed in the mixer 1, the water flows into the cyclone oil removal area of ​​the cylinder 5 from the water inlet 8 in a tangential manner to produce a cyclone flotation effect, thereby enhancing the separation and recovery efficiency of the waste oil;

[0073] The lower end of the cylinder 5 is located in the filtering area, and is also provided with a plurality of filter elements 16 for filtering solid impurities;

[0074] A water outlet 17 is also provided on the side wall of the lower end of the cylinder 5 .

[0075] The cyclone oil removal zone of the cylinder 5 is also provided with a dissolved air water outlet 20, which is connected to the inlet of the dissolved air pump 4, and the dissolved air pump 4 is used to dissolve gas in the liquid;

[0076] The air dissolving pump 4 dissolves oxygen-free gas and mixes it with the oily wastewater, promoting the transfer of oxygen in the water into the gas, which is discharged through the exhaust port 13 to achieve a deoxygenation effect.

[0077] The side wall of the lower head 7 is also provided with a dissolved air water inlet 21;

[0078] The dissolved air water inlet 21 is also connected to the outlet of the micro-nano bubble generator 2 .

[0079] A backwash water outlet 22 is also provided at the lower side of the lower sealing head 7 for discharging the water after cleaning the filter element 16 .

[0080] The filter element 16 is a hydrophilic sintered filter element 16 .

[0081] Separation plates 23 are provided on the upper side and the lower side of the filter element 16 .

[0082] The water outlet 17 is also the backwash water inlet 17 , and clean water is injected through the backwash water inlet 8 to clean the filter element 16 .

[0083] The particle size of the micro-nano bubbles generated by the micro-nano bubble generator 2 is between 0.1-100 microns, preferably 0.1-30 microns; the micro-nano bubbles adhere to the surface of the filter element 16 and the interface membrane between the filter element 16 and the liquid, clean the filter element 16, and extend the maintenance cycle.

[0084] The oil drain pipe 10 is provided with a first control valve 11, and the oil collecting microcavity 9 is provided with a first liquid level gauge 12; the first liquid level gauge 12 is connected to the first control valve 11 and is used to control the oil drain pipe 10 to drain oil;

[0085] The water outlet 17 is provided with a second control valve 18 , and the cylinder 5 is provided with a second liquid level gauge 19 in the cyclone oil removal area; the second liquid level gauge 19 is connected to the second control valve 18 for controlling water discharge.

[0086] The exhaust port 13 is provided with a third control valve 14 , and the upper sealing head 6 is further provided with a pressure transmitter 15 . The pressure transmitter 15 is connected to the third control valve 14 and is used to control the exhaust of the exhaust port 13 .

[0087] The principle of this utility model is as follows:

[0088] Pretreatment and micro-nano bubble generation: First, the oily wastewater is treated by the air dissolving pump 4, dissolved into oxygen-free gas, and then fully mixed with water from the micro-nano bubble generator 2 in the mixer 1. The micro-nano bubble generator 2 uses the water flow output from the stabilization tank to generate micro-nano bubbles with a particle size between 0.1 and 100 microns. These micro-nano bubbles have extremely strong surface activity and suspension stability.

[0089] Cyclone flotation oil removal: The mixed water flows into the upper part of the cyclone filter, the cyclone oil removal area, in a tangential manner, forming a strong cyclone flotation effect. In this process, micro-nano bubbles adhere to and carry oil droplets upward, gather in the oil collection microcavity 9, and then are discharged from the oil discharge pipe 10 under the coordinated action of the first control valve 11 and the first liquid level meter 12. At the same time, the oxygen in the dissolved water is transferred to the gas and discharged through the exhaust port 13 to achieve deoxygenation.

[0090] Desulfurization: First, hydrogen sulfide has a high solubility in oil, so deoiling is equivalent to removing a lot of hydrogen sulfide; secondly, according to Henry's law, the partial pressure of the solute gas in the gas phase is proportional to the concentration of the gas in the liquid phase. The injection of gas will change the gas-liquid equilibrium relationship established by the hydrogen sulfide gas dissolved in water, causing this volatile substance to change from the liquid phase to the gas phase. The mass transfer power is the concentration difference between the liquid and the gas.

[0091] Deep filtration and automatic control: The water after cyclone degreasing continues to flow downward through the filtration area, and the solid impurities therein are effectively intercepted by the hydrophilic sintered filter element 16. The partition plate 23 on the filter element 16 structure optimizes the water flow distribution, and the micro-nano bubbles continue to play their self-cleaning role at this stage, reducing the blockage of the filter element 16 and extending the maintenance cycle. The second control valve 18 and the second liquid level meter 19 configured at the water outlet 17 adjust the drainage according to the liquid level in the cylinder 5.

[0092] Backwashing and system maintenance: When necessary, gas is introduced through the dissolved air water inlet 21 of the lower head 7, and the water outlet 17 is opened as the backwash water inlet 17, and clean water is injected to backwash the filter element 16, and the backwashed water is discharged through the backwash water outlet 22 below the lower head 7. The whole process is intelligently controlled by various control valves and liquid level meters to ensure efficient and stable operation of the system.

[0093] System monitoring and regulation: The pressure transmitter 15 of the upper head 6 monitors the internal pressure of the system, and adjusts the exhaust through the third control valve 14 to maintain the pressure difference between the inside and outside of the system, ensuring the cyclone intensity and filtration efficiency. This series of automated control measures ensures that the system can not only efficiently remove oil and solid impurities when treating sewage, but also automatically maintain and reduce manual intervention, thereby improving the overall processing capacity and the sustainable operation capacity of the system.

[0094] The above description is only a preferred embodiment of the present invention, and does not limit the scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the protection scope of the present invention.

Claims

1. A novel micro-nano bubble cyclone filtration system, characterized in that: include: Cyclone filter, mixer, micro-nano bubble generator, stabilizer, air dissolving pump; The cyclone filter comprises: a cylinder, an upper head and a lower head; The upper head and the lower head are respectively arranged at the upper end and the lower end of the cylinder; The upper part of the cylinder is a cyclone oil removal area and the lower part is a filtration area; Water inlets are tangentially arranged on both sides of the upper end of the cylinder. An oil collecting micro-cavity is also provided on the inner wall of the upper end of the cylinder, and an oil drain pipe is provided in the oil collecting micro-cavity for draining oil dirt; The upper cover is also provided with an exhaust port; The water inlet is connected to the outlet of the mixer, the inlet of the micro-nano bubble generator is connected to the outlet of the stabilization tank, and the outlet of the micro-nano bubble generator is connected to the mixer; The inlet of the stabilization tank is connected to the outlet of the dissolved air pump; After the oily wastewater and the water treated by the micro-nano bubble generator are mixed in the mixer, the water flows into the cyclone oil removal area of ​​the cylinder in a tangential manner from the water inlet to produce a cyclone flotation effect, thereby enhancing the separation and recovery efficiency of the waste oil; The lower end of the cylinder is located in the filtering area and is also provided with a plurality of filter elements for filtering solid impurities; A water outlet is also arranged on the side wall of the lower end of the cylinder.

2. The novel micro-nano bubble cyclone filtration system according to claim 1 is characterized in that: The cyclone deoiling zone of the cylinder is also provided with a dissolved air water outlet, which is connected to the inlet of a dissolved air pump, and the dissolved air pump is used to dissolve gas in the liquid; The dissolved air pump dissolves oxygen-free gas and mixes it with the oily wastewater, promoting the transfer of oxygen in the water into the gas, which is discharged through the exhaust port to achieve a deoxygenation effect.

3. The novel micro-nano bubble cyclone filtration system according to claim 1 is characterized in that: A dissolved air water inlet is also provided on the side wall of the lower head; The dissolved air water inlet is also connected to the outlet of the micro-nano bubble generator.

4. The novel micro-nano bubble cyclone filtration system as claimed in claim 3 is characterized in that: A backwash water outlet is also provided on the lower side of the lower head for discharging the water after cleaning the filter element.

5. The novel micro-nano bubble cyclone filtration system according to claim 1, characterized in that: The filter element is a hydrophilic sintered filter element.

6. The novel micro-nano bubble cyclone filtration system as claimed in claim 3, characterized in that: The upper side and the lower side of the filter element are both provided with partition plates.

7. The novel micro-nano bubble cyclone filtration system as claimed in claim 6, characterized in that: The water outlet is also the backwash water inlet, and clean water is injected through the backwash water inlet to clean the filter element.

8. The novel micro-nano bubble cyclone filtration system as claimed in claim 1, characterized in that: The particle size of the micro-nano bubbles generated by the micro-nano bubble generator is between 0.1 and 100 microns. The micro-nano bubbles adhere to the surface of the filter element and the interface membrane between the filter element and the liquid, so as to clean the filter element and extend the maintenance cycle.

9. The novel micro-nano bubble cyclone filtration system according to claim 1, characterized in that: The oil drain pipe is provided with a first control valve, and the oil collecting microcavity is provided with a first liquid level gauge; the first liquid level gauge is connected to the first control valve and is used to control the oil drain pipe to drain oil; A second control valve is provided on the water outlet, and a second liquid level gauge is provided on the cylinder in the cyclone oil removal area; the second liquid level gauge is connected to the second control valve for controlling water discharge.

10. The novel micro-nano bubble cyclone filtration system according to claim 1, characterized in that: The exhaust port is provided with a third control valve, and the upper cover is also provided with a pressure transmitter, and the pressure transmitter is connected to the third control valve for controlling the exhaust of the exhaust port.

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