Micro-nano ozone liquid two-phase dissolved gas release device suitable for high salinity wastewater

Abstract

This utility model relates to a micro / nano ozone two-phase dissolved gas release device suitable for high-salinity wastewater, comprising a cylindrical body with an inlet water channel, an air inlet channel, a contraction channel, and a gas-liquid channel inside the cylindrical body; the inlet water channel has a spiral channel, which is a variable diameter spiral; the outlet of the spiral channel is connected to the contraction channel, the contraction channel is connected to the gas-liquid channel, and the air inlet channel is connected to the spiral channel. With this micro / nano ozone two-phase dissolved gas release device, the ozone bubble size is between 40nm and 50μm, with nano and micron-sized bubbles coexisting, and the bubbles have a long residence time in the reactor, which can fully and effectively utilize the oxidizing properties of ozone, forming a continuous, slow-release, and large specific surface area multidimensional space oxidation. Especially under high-salinity wastewater conditions, it can effectively prevent the quenching effect of salt on ozone and improve ozone utilization rate.

Description

Technical Field

[0001] This utility model relates to a micro-nano ozone liquid two-phase dissolved gas release device suitable for high-salt wastewater. Background Technology

[0002] In recent years, micro and nano bubbles have been applied in many fields due to their long existence time, high gas-liquid mass transfer efficiency, high interfacial potential, large specific surface area, and ability to generate hydroxyl radicals. These applications include water treatment such as water oxygenation, ozone oxidation, and air flotation; irrigation water treatment and growth promotion of fruits and vegetables in agriculture; rare earth beneficiation using micro and nano bubbles in the mining industry; and applications in medicine, beauty, pesticide residue removal in fruit trees, and pet spas.

[0003] Currently, there are many methods for generating micro- and nano-bubbles, including dissolved gas method, micro-dispersion method, electrolysis method, membrane dispersion method, and ultrasonic cavitation method. ① Dissolved gas method: This is the most common method. Based on Henry's law, a large amount of gas is dissolved in water under pressure to form a supersaturated solution, which is then suddenly depressurized to release the gas and obtain micro- and nano-bubbles. This method is relatively simple, with the core device being a booster pump and a pressure reducing valve. However, it has shortcomings in the continuity of micro- and nano-bubble generation. ② Micro-dispersion method: This method utilizes shear forces such as mechanical shear and hydraulic shear to disperse large bubbles into tiny bubbles. The size of the micro- and nano-bubbles can be controlled by changing parameters. The product forms are diverse, including spiral liquid phase flow micro- and nano-bubble generators, static mixer micro- and nano-bubble generators, and Venturi-type micro- and nano-bubble generators. Compared to other methods, it requires less energy and can continuously generate a large number of micro and nano bubbles, showing great promise for large-scale applications; ③ Electrolysis method: using the electric field generated by a charged metal capillary, the gas is made into bubbles of different sizes and enters the liquid phase. The changes in electric field strength, capillary size, electrode spacing and capillary tip structure can make the bubbles diffuse continuously into the liquid phase in the form of particles or spray. However, because this method has high power consumption, it is not suitable for large-scale applications; ④ Membrane dispersion method: the membrane dispersion method uses the shearing effect of a porous membrane on the gas to cut the gas into tiny bubbles. When the gas pressure on one side of the membrane reaches a certain level (bubble point), the gas will permeate through the membrane pores to the other side of the membrane, forming relatively uniform micro bubbles. Membrane dispersion can generate relatively uniform micro / nanobubbles, and the size of the generated bubbles can be controlled by adjusting the membrane pore size. However, this method requires very high gas pressure to reach the "bubble point" when generating nanobubbles, and the membrane pores are easily blocked by impurities in the water, limiting its application scenarios. ⑤ Ultrasonic cavitation: Ultrasonic cavitation generates gas cavities or microbubbles in a gas-containing solution under the energy radiation of ultrasound. With different ultrasonic oscillation pressures, the generated bubbles expand and contract. Under certain conditions, the bubbles rupture under the action of ultrasonic energy waves, forming micro / nanobubbles. The micro / nanobubbles generated by ultrasonic cavitation are smaller in diameter and have a narrower size distribution than those generated by mechanical processes. However, due to the high energy consumption of this method, it is currently mostly used in laboratory-scale research and has not been widely applied.

[0004] In various wastewater treatment and water resource recovery processes, oxidation of high-organic-content substances in high-salt environments is often required. To avoid altering the salt composition of water due to the addition of other chemical agents, ozone oxidation technology, which avoids secondary pollution, is widely used. However, conventional ozone oxidation suffers from low ozone solubility in water, low ozone utilization, and poor oxidation effect. Therefore, in recent years, ozone and micro / nano technology have been combined to form micro / nano ozone oxidation technology, which is applied to scenarios such as wastewater reuse and near-zero discharge. Typical examples of zero discharge of coking wastewater and pharmaceutical wastewater can be found in China. However, the micro / nano ozone bubble generation technology currently developed in China is not suitable for all wastewater treatment. It is necessary to design appropriate internal structures and hydraulic conditions based on the bubble particle size range and density required for ozone oxidation of organic matter in complex systems. Therefore, for the degradation of organic matter in nitrogen-containing high-salt systems, a micro / nano ozone two-phase dissolved gas release device suitable for high-salt wastewater is being researched and developed. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a micro-nano ozone liquid two-phase dissolved gas release device suitable for high-salt wastewater, thus solving the technical problem that traditional dissolved gas release devices are not suitable for the degradation of organic matter in high-salt systems.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A micro-nano ozone two-phase dissolved gas release device suitable for high-salt wastewater is provided, including a cylinder, wherein a water inlet channel, an air inlet channel, a contraction channel and a gas-liquid channel are provided in the cylinder;

[0008] The water inlet channel is provided with a spiral channel, which is a variable diameter spiral, and the diameter of the gas-liquid channel is larger than the diameter of the contraction channel.

[0009] The spiral channel outlet is connected to the contraction channel, the contraction channel is connected to the gas-liquid channel, and the air inlet channel is connected to the spiral channel;

[0010] Wastewater and gas mix in the spiral channel to form a gas-liquid mixture. The gas-liquid mixture enters the constricting channel, forms micro-nano bubbles, and is then discharged from the gas-liquid channel.

[0011] Furthermore, the distance between the spiral channel inlet and the water inlet channel inlet is 2mm, 4mm, 6mm or 8mm.

[0012] Furthermore, the inlet radius of the spiral channel is 11.5mm, 23mm, 72mm or 115mm, and the corresponding outlet radius of the spiral channel is 2.3mm, 4.6mm, 14.4mm or 23mm.

[0013] Furthermore, the diameter of the contraction channel is 4.5 mm, 9 mm, 14.5 mm, or 22.5 mm.

[0014] Furthermore, the diameter of the air intake channel inlet is 4mm, 8mm, 12.8mm or 20mm.

[0015] Furthermore, the diameters of the water inlet and the gas-liquid outlet are 25mm, 50mm, 80mm, or 125mm.

[0016] Furthermore, the length from the inlet to the contraction port of the water inlet channel is 18mm, 36mm, 58mm, or 90mm, respectively.

[0017] Furthermore, the lengths of the contraction channels are 3mm, 5mm, 8mm, or 12mm, respectively.

[0018] Furthermore, the length of the gas-liquid channel is 10mm, 20mm, 32mm or 50mm.

[0019] Furthermore, the cylinder material is PP, PTFE, PE, duplex stainless steel, 316L stainless steel, or titanium.

[0020] The beneficial effects of this utility model are:

[0021] The micro-nano ozone two-phase dissolved gas release device has ozone bubble sizes between 40nm and 50μm, with both nano and micron-sized bubbles present. The bubbles have a long residence time in the reactor, which can fully and effectively utilize the oxidizing properties of ozone to form a continuous, slow-release, and multi-dimensional oxidation with a large specific surface area. Especially under high-salt wastewater conditions, it can effectively prevent the quenching effect of salt on ozone and improve ozone utilization. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a cross-sectional view of the micro / nano ozone liquid two-phase dissolved gas release device of this utility model;

[0024] Figure 2 This is a left view of the micro / nano ozone liquid two-phase dissolved gas release device of this utility model;

[0025] Figure 3 This is a right-side view of the micro / nano ozone liquid two-phase dissolved gas release device of this utility model;

[0026] Among them, 1. cylinder, 2. water inlet channel, 3. air inlet channel, 4. contraction channel, and 5. gas-liquid channel. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] This application provides a micro / nano ozone liquid two-phase dissolved gas release device suitable for high-salinity wastewater, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0029] To address the technical problem that existing dissolved gas release devices are not suitable for the degradation of organic matter in nitrogen-containing, high-salt systems, this application provides a micro / nano ozone-liquid two-phase dissolved gas release device suitable for high-salt wastewater. This will be described in detail below.

[0030] like Figures 1 to 3 As shown, a micro-nano ozone two-phase dissolved gas release device suitable for high-salt wastewater includes a cylinder 1, wherein a water inlet channel 2, an air inlet channel 3, a contraction channel 4, and a gas-liquid channel 5 are provided inside the cylinder 1.

[0031] The water inlet channel 2 is provided with a spiral channel, which is a variable diameter spiral, and the diameter of the gas-liquid channel 5 is larger than the diameter of the contraction channel 4.

[0032] The spiral channel outlet is connected to the contraction channel 4, the contraction channel 4 is connected to the gas-liquid channel 5, and the air inlet channel 3 is connected to the spiral channel;

[0033] Wastewater and gas mix in the spiral channel to form a gas-liquid mixture. The gas-liquid mixture enters the contraction channel 4, forms micro-nano bubbles, and is then discharged from the gas-liquid channel 5.

[0034] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the distance between the inlet of the spiral channel and the inlet of the water inlet channel 2 is 2mm, 4mm, 6mm or 8mm.

[0035] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the inlet radius of the spiral channel is 11.5mm, 23mm, 72mm or 115mm, and the corresponding outlet radius of the spiral channel is 2.3mm, 4.6mm, 14.4mm or 23mm.

[0036] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the diameter of the contraction channel 4 is 4.5mm, 9mm, 14.5mm or 22.5mm.

[0037] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the diameter of the inlet of the air intake channel 3 is 4mm, 8mm, 12.8mm or 20mm.

[0038] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the diameters of the inlet of the water inlet channel 2 and the outlet of the gas-liquid channel 5 are 25mm, 50mm, 80mm or 125mm.

[0039] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the lengths from the inlet to the constriction port of the water inlet channel 2 are 18mm, 36mm, 58mm, or 90mm, respectively.

[0040] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the lengths of the contraction channels 4 are 3mm, 5mm, 8mm, or 12mm.

[0041] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the length of the gas-liquid channel 5 is 10mm, 20mm, 32mm or 50mm.

[0042] Specifically, as an optional implementation method in this embodiment, such as Figures 1 to 3 As shown, the material of the cylinder 1 is PP, PTFE, PE, duplex stainless steel, 316L stainless steel or titanium.

[0043] Micro-nano ozone two-phase dissolved gas releasers can be machined, molded and cast in one piece, or 3D printed.

[0044] In this embodiment, the inlet of the water inlet channel 2 is connected to the high-salt wastewater inlet pipe by means of a flange or thread.

[0045] In this embodiment, the inlet of the air intake channel 3 is connected to the ozone gas source pipeline by means of a flange or thread.

[0046] In this embodiment, the outlet of the gas-liquid channel 5 has no flange or thread, and the gas is directly released into the oxidation reactor / tower / tank / pool where the object to be treated is located.

[0047] The present invention will be described below through several embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis, and parts not described in detail in a certain embodiment can be referred to the relevant descriptions of other embodiments.

[0048] Example 1

[0049] Taking a micro-nano ozone two-phase dissolved gas emitter with an inlet diameter of 25mm for the water inlet channel 2 as an example, the diameter of the contraction channel 4 is 4.5mm, and the length of the contraction channel 4 is 3mm; the inlet diameter of the air inlet channel 3 is 4mm; the outlet diameter of the gas-liquid channel 5 is 25mm, and the length of the gas-liquid channel 5 is 10mm; the distance between the inlet of the spiral channel and the inlet of the water inlet channel 2 is 2mm, and the inlet radius of the spiral channel is 11.5mm, the corresponding outlet radius of the spiral channel is 2.3mm, the length from the inlet of the water inlet channel 2 to the contraction port is 18mm; the overall length is 31mm; the cylinder 1 is made of one-piece molded PP material with a wall thickness of 3mm.

[0050] Example 2

[0051] Taking a micro-nano ozone two-phase dissolved gas emitter with an inlet diameter of 50mm for the water inlet channel 2 as an example, the diameter of the contraction channel 4 is 9mm, and the length of the contraction channel 4 is 5mm; the inlet diameter of the air inlet channel 3 is 8mm; the outlet diameter of the gas-liquid channel 5 is 50mm, and the length of the gas-liquid channel 5 is 20mm; the distance between the inlet of the spiral channel and the inlet of the water inlet channel 2 is 2mm, and the inlet radius of the spiral channel is 23mm, the corresponding outlet radius of the spiral channel is 4.6mm, the length from the inlet of the water inlet channel 2 to the contraction port is 36mm; the overall length is 61mm; the cylinder 1 is made of one-piece molded PP material with a wall thickness of 3mm.

[0052] Example 3

[0053] Taking a micro-nano ozone two-phase dissolved gas emitter with an inlet diameter of 80mm for the water inlet channel 2 as an example, the diameter of the contraction channel 4 is 14.5mm, and the length of the contraction channel 4 is 8mm; the inlet diameter of the air inlet channel 3 is 12.8mm; the outlet diameter of the gas-liquid channel 5 is 80mm, and the length of the gas-liquid channel 5 is 32mm; the distance between the inlet of the spiral channel and the inlet of the water inlet channel 2 is 2mm, and the inlet radius of the spiral channel is 72mm, the corresponding outlet radius of the spiral channel is 14.4mm, the length from the inlet of the water inlet channel 2 to the contraction port is 58mm; the overall length is 98mm; the cylinder 1 is made of one-piece molded PP material with a wall thickness of 3mm.

[0054] Example 4

[0055] Taking a micro-nano ozone two-phase dissolved gas emitter with an inlet diameter of 125mm for the water inlet channel 2 as an example, the diameter of the contraction channel 4 is 22.5mm, and the length of the contraction channel 4 is 12mm; the inlet diameter of the air inlet channel 3 is 20mm; the outlet diameter of the gas-liquid channel 5 is 125mm, and the length of the gas-liquid channel 5 is 50mm; the distance between the inlet of the spiral channel and the inlet of the water inlet channel 2 is 2mm, and the inlet radius of the spiral channel is 115mm, the corresponding outlet radius of the spiral channel is 23mm, the length from the inlet of the water inlet channel 2 to the contraction port is 90mm; the overall length is 152mm; the cylinder 1 is made of one-piece molded PP material with a wall thickness of 3mm.

[0056] In the micro-nano ozone two-phase dissolved gas emitter, the larger the ratio between the inlet radius and the outlet radius of the spiral channel, the more thoroughly the wastewater is cut within the variable-diameter spiral channel, resulting in a larger contact area with the bubbles and thus forming nano-sized bubbles. Conversely, if the ratio between the inlet radius and the outlet radius of the spiral channel is smaller, it means that the wastewater is not cut as thoroughly, the contact area with the gas is relatively limited, and micron-sized bubbles are formed in the gas-liquid channel 5.

[0057] The micro-nano ozone two-phase dissolved gas release device of this invention has ozone bubble sizes between 40nm and 50μm, with both nano and micron-sized bubbles present. The bubbles have a long residence time in the reactor, which can fully and effectively utilize the oxidizing properties of ozone to form a continuous, slow-release, and multi-dimensional space oxidation with a large specific surface area. Especially under high-salt wastewater conditions, it can effectively prevent the quenching effect of salt on ozone and improve ozone utilization.

[0058] All the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0059] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0060] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0061] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0062] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0063] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0064] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A micro / nano ozone liquid two-phase dissolved gas release device suitable for high-salinity wastewater, characterized in that, It includes a cylinder (1), and the cylinder (1) has a water inlet channel (2), an air inlet channel (3), a contraction channel (4) and a gas-liquid channel (5); The water inlet channel (2) is provided with a spiral channel, which is a variable diameter spiral, and the diameter of the gas-liquid channel (5) is larger than the diameter of the contraction channel (4); The spiral channel outlet is connected to the contraction channel (4), the contraction channel (4) is connected to the gas-liquid channel (5), and the air inlet channel (3) is connected to the spiral channel; Wastewater and gas mix in the spiral channel to form a gas-liquid mixture. The gas-liquid mixture enters the contraction channel (4) to form micro-nano bubbles and then exits from the gas-liquid channel (5).

2. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The distance between the inlet of the spiral channel and the inlet of the water inlet channel (2) is 2mm, 4mm, 6mm or 8mm.

3. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The inlet radius of the spiral channel is 11.5mm, 23mm, 72mm or 115mm, and the corresponding outlet radius of the spiral channel is 2.3mm, 4.6mm, 14.4mm or 23mm.

4. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The diameter of the contraction channel (4) is 4.5 mm, 9 mm, 14.5 mm or 22.5 mm.

5. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The diameter of the inlet of the air intake channel (3) is 4mm, 8mm, 12.8mm or 20mm.

6. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The diameters of the inlet of the water inlet channel (2) and the outlet of the gas-liquid channel (5) are 25mm, 50mm, 80mm or 125mm.

7. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The lengths from the inlet to the constriction of the water inlet channel (2) are 18mm, 36mm, 58mm or 90mm respectively.

8. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The lengths of the contraction channels (4) are 3mm, 5mm, 8mm or 12mm respectively.

9. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The length of the gas-liquid channel (5) is 10 mm, 20 mm, 32 mm or 50 mm.

10. The micro / nano ozone two-phase dissolved gas release device for high-salinity wastewater according to claim 1, characterized in that, The cylinder (1) is made of PP, PTFE, PE, duplex stainless steel, 316L stainless steel or titanium.

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