Novel micro-nano bubble cyclone filter

Abstract

The utility model provides a novel micro-nano bubble cyclone filter, which comprises a barrel, an upper seal head and a lower seal head, at least one water inlet is tangentially arranged on two sides of the upper end of the barrel, the water inlet is connected with a water inlet pipeline, and a gas injection port is further arranged on the water inlet pipeline; the inner wall of the upper end of the cylinder body is also provided with an oil collecting micro-cavity; an oil discharge outlet is further formed in one side of the upper end of the cylinder body, is connected with the oil collection micro-cavity and is used for discharging oil dirt; the upper sealing head is also provided with an exhaust port; oxygen-free gas injected from the gas injection port is mixed with oily sewage, so that oxygen in water is promoted to be transferred into the gas and is discharged through the exhaust port, and the deoxygenization effect is achieved. The micro-nano bubble cyclone filter disclosed by the utility model integrates a plurality of advanced functions such as cyclone separation, high-efficiency filtration, automatic control, deep deoxygenation and self-adaptive maintenance, so that the overall efficiency of sewage treatment is remarkably improved, the operation cost is reduced, and the micro-nano bubble cyclone filter is an important innovation in the technical field of water treatment.

Description

Technical Field

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

[0002] At present, the refining industry widely adopts a variety of methods in the pretreatment stage of oily wastewater, including sedimentation separation, coarse granulation, membrane separation, filtration, adsorption and cyclone flotation. Among them, cyclone flotation technology combines the advantages of flotation and centrifugal cyclone technology, which significantly improves the treatment speed and efficiency of oily wastewater. However, this technology has limited effectiveness in removing fine impurities in water. These residual impurities will have a negative impact on subsequent sewage treatment equipment, which not only increases the operation and maintenance burden of the equipment, but may also cause unstable operation.

[0003] In traditional solutions, although some filtering devices can improve the accuracy of sewage treatment to a certain extent, they are usually accompanied by large floor space, high investment and operating costs, and are prone to clogging and require frequent maintenance. For example, the high-precision cyclone separation filter proposed in CN 104190154 B, although it improves the filtering accuracy and backwashing effect, is still limited in its ability to demulsify and remove oil, resist corrosion, and operate stably for the complex and high-oil sewage at the front end of the refining process.

[0004] The shortcomings of current technology are mainly reflected in:

[0005] 1. Insufficient efficiency and effect: When treating oily wastewater, traditional sewage treatment equipment has low oil-water separation efficiency, making it difficult to effectively recover oil pollution, and has limited deoxygenation capacity, which affects the quality and scope of application of treated water.

[0006] 2. High maintenance cost: The filter element in the conventional filtration system is easy to clog and needs to be replaced or cleaned frequently, which increases the cost and complexity of operation and maintenance.

[0007] 3. Low degree of automation: Many systems lack intelligent control, such as liquid level control and automatic oil drainage functions, rely on manual monitoring, and are unresponsive and inefficient.

[0008] 4. Poor multi-functional integration: Existing equipment often focuses on a single processing function, such as oil removal or filtration only, and fails to effectively integrate multiple functions such as cyclone separation, flotation, filtration, and deoxygenation, resulting in complex processing procedures and large floor space.

[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 filter.

[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 filter, comprising:

[0013] The cylinder has a cyclone oil removal area at the top and a filtration area at the bottom;

[0014] The upper head is located at the top of the cyclone deoiling area and is arranged at the upper end of the cylinder;

[0015] The lower head is located below the filtration area and is arranged at the lower end of the cylinder;

[0016] At least one water inlet is tangentially arranged on both sides of the upper end of the cylinder, and the water inlet is used to inject the oily wastewater to be treated, so that the water flow enters in a tangential manner to produce a cyclonic flotation effect, thereby enhancing the separation and recovery efficiency of the waste oil. The water inlet is connected to a water inlet pipe, and an air injection port is also arranged on the water inlet pipe;

[0017] An oil collecting micro-cavity is also provided on the inner wall of the upper end of the cylinder;

[0018] An oil discharge port is also provided on one side of the upper end of the cylinder, and the oil discharge port is connected to the oil collecting micro-cavity for discharging oil dirt;

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

[0020] The oxygen-free gas injected from the gas injection port is mixed with the oily wastewater to promote the transfer of oxygen in the water into the gas, which is then discharged through the exhaust port to achieve a deoxygenation effect;

[0021] The gas injected from the gas injection port forms micro-nano bubbles;

[0022] The particle size of the micro-nano bubbles 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 film between the filter element and the liquid to clean the filter element and extend the maintenance cycle.

[0023] Furthermore, the oil discharge port is also connected to a liquid level gauge and a pressure transmitter. The liquid level gauge is arranged in the oil collecting microcavity. The oil discharge port controls the pressure transmitter to discharge oil according to the liquid level data fed back by the liquid level gauge.

[0024] Furthermore, 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.

[0025] Furthermore, partition plates are provided on the upper side and the lower side of the filter element.

[0026] Furthermore, a water outlet is also provided on the side wall of the lower end of the cylinder.

[0027] 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.

[0028] Furthermore, a backwash water outlet is provided at the lower end of the lower head for discharging water after cleaning the filter element.

[0029] Furthermore, the lower cover is also provided with a dissolved air water inlet for injecting micro-nano bubbles.

[0030] The technical solution of the utility model has the following beneficial effects:

[0031] 1. Efficient oil-water separation and recovery: Through the design of the cyclone oil removal area, the cyclone flotation effect generated by the tangential water inlet is used to significantly enhance the separation efficiency of the dirty oil and water, which not only improves the recovery rate of the oil pollution, but also reduces the emission of pollutants, which is beneficial to the recycling of resources and environmental protection.

[0032] 2. Intelligent automatic control: The linkage design between the oil discharge port, the liquid level gauge and the pressure transmitter realizes the automatic adjustment of the oil discharge process according to the liquid level in the oil collecting micro-cavity, improves the automation level and operation efficiency of the system, reduces the need for manual intervention, and ensures stable and continuous operation.

[0033] 3. Deep deoxygenation and desulfurization capabilities: The oxygen-free gas injected from the gas injection port mixes with the oily wastewater, effectively promoting the transfer of oxygen in the water and discharging it through the exhaust port, greatly improving the deoxygenation efficiency. This is of great significance for some oxygen-sensitive post-treatment processes or water requirements, and ensures water quality standards.

[0034] 4. High-efficiency filtration and simplified maintenance: The use of hydrophilic sintered filter elements, combined with the upper and lower partition plate design, not only improves the filtration efficiency, especially the interception ability of solid impurities, but also the introduction of micro-nano bubbles further enhances the self-cleaning effect of the filter element, effectively extending the maintenance cycle of the filter element and reducing maintenance costs and frequency.

[0035] 5. Integrated backwash function: The water outlet is designed to serve as the backwash water inlet. Combined with a special backwash water outlet, a convenient and efficient filter element backwash system is formed, which can quickly and effectively remove blockages on the filter element, restore filter element performance, and ensure the continuity and stability of filtration efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the utility model;

[0037] Figure 2 It is a schematic diagram of the tangential swirl of the utility model;

[0038] Figure 3 It is a top view of the filter of the present utility model.

[0039] In the figure:

[0040] 1. Cylinder; 2. Air outlet; 3. Oil discharge outlet; 4. Oil collecting micro-cavity; 5. Water inlet; 6. Air injection port; 7. Partition plate; 8. Water outlet / backwash water inlet; 9. Dissolved air water inlet; 10. Filter element; 11. Backwash water outlet; 12. Upper head; 13. Lower head. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Combination Figure 1-Figure 3As shown, the utility model provides a novel micro-nano bubble cyclone filter, comprising: a cylinder 1, the upper part of which is a cyclone oil removal zone and the lower part is a filtering zone; an upper head 12, located at the top of the cyclone oil removal zone, and arranged at the upper end of the cylinder 1; a lower head 13, located below the filtering zone, and arranged at the lower end of the cylinder 1; at least one water inlet 5 is tangentially arranged on both sides of the upper end of the cylinder 1, and the water inlet 5 is used to inject the oily sewage to be treated, so that the water flow enters in a tangential manner to produce a cyclone flotation effect, thereby enhancing the separation and recovery efficiency of the dirty oil, and the water inlet 5 is connected to a water inlet pipe, and an air injection port 6 is also arranged on the water inlet pipe; an oil collecting microcavity 4 is also arranged on the inner wall of the upper end of the cylinder 1; an oil discharge port 3 is also arranged on one side of the upper end of the cylinder 1, and the oil discharge port 3 is connected to the oil collecting microcavity 4 for discharging oil pollution;

[0046] The upper head 12 is also provided with an exhaust port 2; the oxygen-free gas injected from the gas injection port 6 is mixed with the oily wastewater to promote the transfer of oxygen in the water into the gas, which is discharged through the exhaust port 2 to achieve a deoxygenation effect.

[0047] The gas injected from the gas injection port 6 forms micro-nano bubbles; the particle size of the micro-nano bubbles is between 0.1-100 microns, preferably 0.1-30 microns; the micro-nano bubbles adhere to the surface of the filter element 10 and the interface membrane between the filter element 10 and the liquid, cleaning the filter element 10 and extending the maintenance cycle. The gas injected from the gas injection port forms micro-nano bubbles;

[0048] The oil discharge port 3 is also connected to a liquid level meter and a pressure transmitter. The liquid level meter is arranged in the oil collecting microcavity 4. The oil discharge port 3 controls the pressure transmitter to discharge oil according to the liquid level data fed back by the liquid level meter.

[0049] The lower end of the cylinder 1 is located in the filtering area, and is also provided with a plurality of filter elements 10 for filtering solid impurities. The filter element 10 is a hydrophilic sintered filter element. The upper and lower sides of the filter element 10 are both provided with partition plates 7.

[0050] The side wall at the lower end of the cylinder 1 is also provided with a water outlet 8. The water outlet 8 is also the backwash water inlet 8, and clean water is injected through the backwash water inlet 5 to clean the filter element 10. The lower end of the lower head 13 is also provided with a backwash water outlet 11 for discharging water after cleaning the filter element 10. The lower head 13 is also provided with a dissolved air water inlet 9 for injecting micro-nano bubbles.

[0051] The principle of this utility model is as follows:

[0052] Water inlet and cyclone flotation: The oily wastewater is injected into the cyclone oil removal area at the top of the cylinder 1 through the tangential water inlet 5 through the water inlet pipe. Due to the tangential entry of the water flow, a strong cyclone is formed. This process not only accelerates the separation of oil and water, but also causes the oil droplets to float. The cyclone flotation effect is used to greatly improve the aggregation and recovery efficiency of the dirty oil.

[0053] Deoxygenation treatment: oxygen-free gas is injected simultaneously through the gas injection port 6 on the water inlet pipe. After mixing with the oily wastewater, the dissolved oxygen in the water is transferred to the gas through physical action. Subsequently, the oxygen-containing gas is discharged through the exhaust port 2 of the upper head 12, thereby effectively reducing the dissolved oxygen content in the water and achieving the purpose of deoxygenation.

[0054] 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.

[0055] Oil collection and automatic discharge: The floating oil is collected in the oil collecting micro-cavity 4, and is automatically controlled by the oil discharge port 3 connected to the liquid level meter and the pressure transmitter. It is opened in time according to the liquid level data to discharge the oil efficiently and maintain stable operation of the system.

[0056] Solid impurity filtration: The water treated in the cyclone oil removal area continues to flow downward and enters the lower filtration area, where several hydrophilic sintered filter elements are installed, which can effectively intercept and filter out solid impurities in the water.

[0057] Backwashing and micro-nano bubble cleaning: In order to maintain the cleanliness and filtration efficiency of the filter element 10, the system is designed with a backwashing mechanism. The water outlet 8 is also the backwash water inlet 8, through which clean water can be injected to reversely wash the filter element 10, and the washed sewage is discharged through the backwash water outlet 11 of the lower head 13. At the same time, the dissolved air water inlet 9 of the lower head 13 is injected with micro-nano bubbles (with a particle size between 0.1-100 microns, preferably 0.1-30 microns). These tiny bubbles can adhere to the surface of the filter element 10 and the filtrate interface, helping to remove stubborn impurities and extend the service life and maintenance cycle of the filter element 10.

[0058] The entire workflow has achieved comprehensive optimization from oil-water separation, deoxygenation, filtration to automatic maintenance management, greatly improving the efficiency and effectiveness of sewage treatment. Specific embodiment:

[0060] A partition plate 7 is provided in the cylinder 1 to separate the cyclone oil removal area from the filtration area;

[0061] The outer wall of the cyclone oil removal area is provided with water inlets 5 on both sides, and the water inlet pipeline is provided with air injection ports 6. The gas and liquid are mixed tangentially into the cyclone oil removal area, which has a cyclone flotation effect.

[0062] On the one hand, it can demulsify (part of the bubbles quickly collapse under external pressure when they move from the high pressure area of ​​the vortex to the low pressure area, which increases the probability of oil droplets colliding and coalescing with each other, and at the same time weakens the strength of the interface film, which is easily destroyed by the outside world, thus achieving the purpose of demulsification.) Oil removal,

[0063] On the other hand, it can remove oxygen (if the injected micro-nano bubbles are oxygen-free gas, after the oxygen-free gas is mixed with oily wastewater, the oxygen-containing gas in the wastewater diffuses into the oxygen-free gas to form oxygen-containing gas, and the oxygen-containing gas is enriched at the gas outlet and then discharged.) and remove sulfur.

[0064] An oil discharge port 3 is provided on one side, and the oil discharge port is connected to a liquid level gauge to control the liquid level of the oil collecting micro-cavity 4, so as to facilitate oil discharge and dirt removal.

[0065] The top of the cylinder 1 is provided with an upper head 12, and the outer wall of the upper head 12 is provided with an exhaust port 2, and the exhaust port 2 can control the liquid level of the cyclone deoiling area through a pressure transmitter. Two partition plates 7 are provided in the middle of the filter area, and several hydrophilic sintered filter elements are connected in the middle of the partition plates to remove iron and impurities. A water outlet 8 is provided on one side of the outer wall of the filter area, which is the backwash water inlet 8 during backwashing.

[0066] The bottom of the cylinder 1 is a lower head 13, and a dissolved air water inlet 10 is provided on one side of the outer wall of the lower head 13. On the one hand, the filter can be automatically cleaned during operation, which greatly extends the backwashing cycle; on the other hand, the micro-nano bubble particle size is 0.1-30µm, adheres to the surface of the hydrophilic sintered filter element, and can enter the interface membrane between the filter element and the liquid. Under the combined action of buoyancy, pressure and surface tension, it performs an oscillating upward motion in the vertical direction in the interface membrane, providing disturbance for the filter element interface membrane, creating a relatively clean operating environment under the condition of complex oily wastewater composition, thereby greatly increasing the filter backwashing cycle and life.

[0067] A backwash water outlet 11 is provided at the bottom. During backwashing, the backwash water from the backwash water inlet 8 cooperates with the disturbance effect of the micro-nano bubbles to wash out all the impurities, and then clean water is injected from the water inlet to flush out the impurities. The backwashing cooperates with the micro-nano bubbles to greatly extend the maintenance cycle of the filter and ensure the "full and excellent" operation of the filter element.

[0068] 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 filter, characterized in that: include; The cylinder has a cyclone oil removal area at the top and a filtration area at the bottom; The upper head is located at the top of the cyclone deoiling area and is arranged at the upper end of the cylinder; The lower head is located below the filtration area and is arranged at the lower end of the cylinder; At least one water inlet is tangentially arranged on both sides of the upper end of the cylinder, and the water inlet is used to inject the oily wastewater to be treated, so that the water flow enters in a tangential manner to produce a cyclonic flotation effect, thereby enhancing the separation and recovery efficiency of the waste oil. The water inlet is connected to a water inlet pipe, and an air injection port is also arranged on the water inlet pipe; An oil collecting micro-cavity is also provided on the inner wall of the upper end of the cylinder; An oil discharge port is also provided on one side of the upper end of the cylinder, and the oil discharge port is connected to the oil collecting micro-cavity for discharging oil dirt; The upper cover is also provided with an exhaust port; The oxygen-free gas injected from the gas injection port is mixed with the oily wastewater to promote the transfer of oxygen in the water into the gas, which is then discharged through the exhaust port to achieve a deoxygenation effect; The gas injected from the gas injection port forms micro-nano bubbles; The particle size of the micro-nano bubbles 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 to clean the filter element and extend the maintenance cycle.

2. The micro-nano bubble cyclone filter according to claim 1, characterized in that: The oil discharge port is also connected to a liquid level meter and a pressure transmitter. The liquid level meter is arranged in the oil collecting micro-cavity. The oil discharge port controls the pressure transmitter to discharge oil according to the liquid level data fed back by the liquid level meter.

3. The micro-nano bubble cyclone filter according to claim 1, characterized in that: 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.

4. The micro-nano bubble cyclone filter according to claim 3, characterized in that: The upper side and the lower side of the filter element are both provided with partition plates.

5. The micro-nano bubble cyclone filter according to claim 2, characterized in that: A water outlet is also arranged on the side wall of the lower end of the cylinder.

6. The micro-nano bubble cyclone filter according to claim 5, 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.

7. The micro-nano bubble cyclone filter according to claim 2, characterized in that: The lower end of the lower head is also provided with a backwash water outlet for discharging the water after cleaning the filter element.

8. The micro-nano bubble cyclone filter according to claim 2, characterized in that: The lower cover is also provided with a dissolved air water inlet for injecting micro-nano bubbles.

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