Tubular ozone hydrodynamic cavitation gas dissolving device

Abstract

The utility model discloses a tubular ozone hydrodynamic cavitation gas dissolving device which comprises an aqueous solution pipeline, the aeration part is partially arranged in the water solution pipeline and is used for conveying a gas oxygen producer into the water flow; the spiral hydrodynamic cavitation assembly is arranged in the water solution pipeline and used for fully mixing and dissolving a gas oxygenating agent and water flow, the arrangement direction of the spiral hydrodynamic cavitation assembly is the same as the axial direction of the water solution pipeline, the spiral hydrodynamic cavitation assembly comprises a rotating shaft, and spiral blades with unequal intervals are arranged on the rotating shaft at intervals; the screw pitch between every two adjacent spiral blades is gradually decreased and then increased according to the direction of water flow, and the blades can rotate in a one-way mode under the impact effect of the water flow. According to the device, a spiral blade arrangement mode of a reducing structure is adopted, so that the cavitation effect of water flow is greatly improved, the retention time of ozone in the water flow is prolonged, and the solubility of the ozone in water is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of water pollution treatment, and in particular relates to a tubular ozone hydrodynamic cavitation gas dissolving device. Background Art

[0002] Ozone is a pale blue gas with a distinctive odor. Its solubility in water is approximately 10 times that of oxygen. Although ozone is more soluble in water than oxygen, its dissolution efficiency is still relatively low in practice. According to Henry's law, ozone solubility is proportional to the partial pressure and total pressure in the system. The extremely low ozone content and partial pressure in air force ozone to escape from the water-air interface, resulting in a continuous decrease in ozone concentration. Furthermore, ozone is unstable and decomposes rapidly in water, more readily breaking down into oxygen, thus reducing its oxidizing capacity. Therefore, low ozone solubility and rapid decomposition are key challenges that need to be addressed in the application of ozone technology in water treatment.

[0003] Conventional ozone aeration methods produce bubbles with large diameters, rapid rise velocities, and short breakup times, resulting in low ozone mass transfer and oxidation efficiencies. To increase ozone's residence time in water, ozone contact tanks are typically set at a depth of 4 to 6 meters, resulting in high investment costs for ozone treatment process structures. Furthermore, ozone is toxic to humans. Unabsorbed ozone gas released from ozone contact tanks must be treated before being released into the atmosphere, leading to high construction and operating costs for ozone oxidation equipment. Furthermore, the high cost of ozone production limits the further application of ozone technology in water treatment. Improving ozone utilization is an effective way to reduce the construction and operating costs of ozone process structures and equipment. Therefore, there is an urgent need to develop efficient ozone aeration methods and enhance ozone mass transfer efficiency to achieve improved efficiency and energy savings in the ozone oxidation process. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to solve the shortcomings of the ozone bubbles produced by conventional aeration devices in the prior art, such as poor stability, low solubility, short residence time, slow oxidation rate, and excessive aeration energy consumption; as well as the disadvantage that conventional aeration devices have corresponding depth requirements for the pool type, resulting in a large pool area; thereby providing a tubular ozone hydrodynamic cavitation dissolution device that can generate micron-sized bubbles, promote ozone dissolution, enhance the ability to produce hydroxyl free radicals, and reduce the cost of production raw materials.

[0005] The utility model is implemented by the following technical solutions:

[0006] A tubular ozone hydrodynamic cavitation gas dissolving device, comprising an aqueous solution pipeline;

[0007] an aerator, partially located within the aqueous solution pipeline, for delivering a gaseous oxygenator into the water flow; and

[0008] The spiral hydrodynamic cavitation component is arranged inside the aqueous solution pipeline and is used to fully mix and dissolve the gas oxygenator and the water flow. The setting direction of the spiral hydrodynamic cavitation component is the same as the axial direction of the aqueous solution pipeline. The spiral hydrodynamic cavitation component includes a rotating shaft, and spiral blades with unequal spacing are arranged on the rotating shaft. The pitch between adjacent spiral blades changes from large to small and then to large according to the direction of the water flow. The blades can rotate unidirectionally under the impact of the water flow.

[0009] To optimize the above technical solutions, specific measures taken also include:

[0010] Furthermore, the aqueous solution pipeline is a straight cylindrical structure.

[0011] Furthermore, the aeration element includes a first straight pipe and a second straight pipe, the first straight pipe and the aqueous solution pipeline are arranged perpendicular to each other, the first straight pipe portion is inserted into the aqueous solution pipeline, the second straight pipe is arranged inside the aqueous solution pipeline, the second straight pipe and the aqueous solution pipeline are axially parallel to each other, and the first straight pipe and the second straight pipe are connected.

[0012] Furthermore, the distance between the second straight tube and the rotating shaft is 70 mm, the diameter of the second straight tube is 10 mm, and the oxygenant is transported to the aqueous solution pipeline through the second straight tube.

[0013] Furthermore, the flow rate of the oxygenating agent is the same as that of the water flow, and the oxygenating agent is ozone.

[0014] Furthermore, a fixed bracket is provided inside the aqueous solution pipeline, an outer ring of the fixed bracket abuts against the inner wall of the aqueous solution pipeline, and a rotating shaft is rotatably provided in the middle of the fixed bracket.

[0015] Furthermore, the rotating shaft includes two first connecting rods, and multiple second connecting rods of different lengths and spliced with each other are arranged between the two first connecting rods. A first plug-in end is provided on the side of the first connecting rod close to the second connecting rod, and the diameter of the first plug-in end is smaller than the diameter of the first connecting rod. One end of the second connecting rod is a hollow end, and a second plug-in end is provided on the other end of the second connecting rod, and the diameter of the second plug-in end is smaller than the diameter of the second connecting rod. The diameters of the first connecting rod and the second connecting rod are the same, the plug-in end of the first connecting rod is inserted into the hollow end of the adjacent second connecting rod, and the second plug-in end of the second connecting rod is inserted into the hollow end of the adjacent second connecting rod. The ends of the two first connecting rods away from each other are both provided with a crushing head with a conical structure, and the tip of the crushing head is aligned with the center of the second straight tube. Each of the first connecting rod and the second connecting rod is provided with a spiral blade.

[0016] Furthermore, the outer diameter of the spiral blade is 50 mm, the inner diameter of the spiral blade is 15 mm, and the spiral blade is arranged in a clockwise direction of 180°.

[0017] Furthermore, the pitch between adjacent spiral blades ranges from 100 mm to 250 mm, the minimum pitch between adjacent spiral blades is 100 mm, and the maximum pitch between adjacent spiral blades is 250 mm.

[0018] Furthermore, the aqueous solution pipeline adopts a porcelain core water pipe, and the porcelain core water pipe contains active metal cerium and manganese elements.

[0019] Beneficial effects of the utility model:

[0020] Compared with the existing technology, the tubular ozone hydrodynamic cavitation gas dissolving device of the utility model has the advantages of

[0021] The spiral blade arrangement with a variable diameter structure greatly improves the cavitation effect of the water flow, prolongs the residence time of ozone in the water flow, and increases the solubility of ozone in water. Compared with the liquid ozone concentration prepared by conventional methods, it is increased by about 30%.

[0022] By utilizing the cavitation effect, pollutants are degraded more efficiently: by using porcelain core water pipes containing active metals, the catalytic effect on ozone is enhanced, and the degradation mineralization degree is further improved.

[0023] The device occupies a small area, has low installation cost, simple structure and is easy to install and use.

[0024] This device can control the cavitation effect by changing the ozone flow rate and water flow rate, and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a structural schematic diagram of a tubular ozone hydrodynamic cavitation dissolved gas device.

[0026] Figure 2 for Figure 1 Exploded view of the middle part structure.

[0027] Figure 3 for Figure 2 Schematic diagram of the internal structure of the middle part.

[0028] Figure 4 This is a diagram of the simulated pressure condition of the device of the utility model.

[0029] Figure 5 This is a diagram of the simulated flow velocity condition of the device of the utility model.

[0030] Figure 6This is a simulation diagram of ozone mixing distribution in the utility model device.

[0031] The figures are marked as: aqueous solution pipeline 10, aeration element 20, first straight pipe 21, second straight pipe 22, spiral hydrodynamic cavitation assembly 30, rotating shaft 31, first connecting rod 311, first plug end 311a, second connecting rod 312, second plug end 312a, hollow end 312b, spiral blade 32, fixing bracket 33, crushing head 34. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0033] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0034] When treating wastewater containing organic pollutants that are difficult to remove using traditional methods, such as industrial wastewater, it is often necessary to add oxidants to the wastewater. Oxidants can effectively oxidize organic matter and pollutants in the wastewater, enhancing the treatment effect of the wastewater. At the same time, due to the complexity of the wastewater, simple oxidation treatment cannot fully achieve the purification effect. Therefore, further treatment steps such as precipitation, filtration, or biological treatment are required to ensure that the effluent meets the discharge standards. This device is mainly used to dissolve the oxidant in the wastewater to be treated, increase the solubility and residence time of the oxidant in the wastewater, and then send the oxidized wastewater to the next level of treatment for further treatment.

[0035] like Figure 1 As shown, a tubular ozone hydrodynamic cavitation dissolution device is provided, including an aqueous solution pipeline 10, which serves as a pipeline for wastewater circulation, the input end of the aqueous solution pipeline 10 is connected to the wastewater source, and the output end of the aqueous solution pipeline 10 is connected to the next-level wastewater treatment process; an aeration element 20, which is partially arranged inside the aqueous solution pipeline 10 and is used to transport a gaseous oxygenator into the water flow; and a spiral hydrodynamic cavitation component 30, which is arranged inside the aqueous solution pipeline 10 and is used to fully mix and dissolve the gaseous oxygenator and wastewater, and oxidize and decompose organic matter and pollutants in the wastewater.

[0036] In order to maintain the efficiency of wastewater treatment and take into account the treatment process in the subsequent oxidation stage, the aqueous solution pipeline 10 is set to a straight cylindrical structure. At the same time, the aqueous solution pipeline 10 uses a porcelain core water pipe containing active metal cerium and manganese elements.

[0037] To facilitate the subsequent generation of more microbubbles and increase the solubility of ozone in the wastewater, the aerator 20 includes a first straight tube 21 and a second straight tube 22. The first straight tube 21 is arranged perpendicularly to the aqueous solution pipeline 10 and partially inserted into the aqueous solution pipeline 10. The second straight tube 22 is arranged inside the aqueous solution pipeline 10 and is axially parallel to the aqueous solution pipeline 10. The first straight tube 21 and the second straight tube 22 are connected, and a dispersion pipe is located at the end of the second straight tube 22. The distance between the second straight tube 22 and the spiral hydrodynamic cavitation assembly 30 is 70 mm, and the diameter of the second straight tube 22 is 10 mm. The oxygenator is delivered to the aqueous solution pipeline 10 through the second straight tube 22. The oxygenator has the same flow rate as the water flow, and the oxygenator is ozone.

[0038] The process of ozone being transported into the wastewater through the aerator 20 to generate bubbles is as follows:

[0039] Ozone is first introduced through the aeration tube's first straight tube 21 and then discharged through the second straight tube 22, forming bubbles that dissolve into the wastewater. Depending on the set flow rate and the diameter of the second straight tube 22, the ozone bubbles can be evenly dispersed throughout the wastewater, facilitating the subsequent cavitation treatment.

[0040] Ozone bubbles formed solely by the second straight tube 22 have low solubility in wastewater and a short residence time. Therefore, in order to improve the solubility and residence time, a spiral hydrodynamic cavitation assembly 30 is provided inside the aqueous solution pipeline 10 .

[0041] The setting direction of the spiral hydrodynamic cavitation component 30 is the same as the axial direction of the aqueous solution pipeline 10. The spiral hydrodynamic cavitation component 30 includes a rotating shaft 31, on which spiral blades 32 with unequal spacing are arranged at intervals. The pitch between adjacent spiral blades 32 changes from large to small and then to large according to the direction of water flow. The blades can rotate unidirectionally under the impact of water flow.

[0042] The outer diameter of the spiral blade 32 is 50 mm, the inner diameter of the spiral blade 32 is 15 mm, and the spiral blade 32 is arranged 180° in a clockwise direction. The maximum pitch between adjacent spiral blades 32 is 250 mm, and the minimum pitch between adjacent spiral blades 32 is 100 mm.

[0043] In order to better fix the rotating shaft 31 and adjust the variable pitch between the spiral blades 32, a fixed bracket 33 is provided inside the aqueous solution pipeline 10. The outer ring of the fixed bracket 33 abuts against the inner wall of the aqueous solution pipeline 10, and the rotating shaft 31 is rotatably provided in the middle of the fixed bracket 33. In this embodiment, the rotating connection between the rotating shaft 31 and the fixed bracket 33 is achieved by rotating the bearing. At the same time, the rotating shaft includes two first connecting rods 311, and multiple sections of second connecting rods 312 of different lengths and spliced with each other are provided between the two first connecting rods 311. A first plug-in end 311a is provided on the side of the first connecting rod 311 close to the second connecting rod 312. The diameter of the first plug-in end 311a is smaller than the diameter of the first connecting rod 311. One end of the second connecting rod 312 is a hollow end 312b, and the other end of the second connecting rod 312 is provided with a second plug-in end 312a. The diameter of the second plug-in end 312a is smaller than the diameter of the second connecting rod 312. The first connecting rod 311 and the second connecting rod 312 have the same diameter. The first plug end 311a of the first connecting rod 311 is inserted into the hollow end 312b of the adjacent second connecting rod 312, and the second plug end 312a of the second connecting rod 312 is inserted into the hollow end 312b of the adjacent second connecting rod 312. The ends of the two first connecting rods 311 facing away from each other are each provided with a conical crushing head 34, with the tip of the crushing head 34 aligned with the center of the second straight tube 22. Each first connecting rod 311 and the second connecting rod 312 are each provided with a spiral blade 32. During actual adjustment, the pitch between adjacent spiral blades 32 can be changed by selecting different second connecting rods 312 to be spliced with the first connecting rod 311. Multiple second connecting rods 312 of different lengths at the same location can be prefabricated and spliced together according to the application scenario to achieve variable pitch adjustment. Specific embodiments

[0045] In the range of spiral parameter pitch of 100-250 mm, according to the number of spiral blades 32, the pitch between the spiral blades 32 is set according to the variable diameter spacing, and the total length of the aqueous solution pipeline 10 is controlled to be 2.5 m, the radius is 0.25 m, and the thickness is 0.05 m. The influence of different spirals on the hydrodynamic cavitation results is studied, and a fixed pitch is set as a comparative example for analysis and comparison.

[0046] like Figure 4-6As shown, the pressure working condition, flow rate working condition and ozone mixing distribution of the device are simulated and analyzed respectively. Under the condition that the outlet of the aqueous solution pipeline 10 is an open boundary, the difference in the internal pressure of the fluid is not large. At the second straight pipe 22, the maximum speed is generated when ozone enters the wastewater. However, since this is the air inlet, the ozone enters continuously, and the ozone here is simply broken into small bubbles to form a bubble mixing flow. After being stirred by the spiral blades 32, it is cut into smaller bubbles. By comparing the fixed pitch and variable pitch cases, it can be seen that the speed of using the variable pitch spiral is significantly greater, and it can be broken into more miniature bubbles.

[0047] Under the same time conditions, the inflowing gas velocity and water flow velocity remain constant, and the introduced gas volumes are equal. Since the solubility of gas in water has an upper limit, the portion exceeding this limit exists as bubbles. Since the upper limit of gas mixing in actual mixed bubble flows is almost impossible to reach this volume fraction, it can be considered that gas cavities are generated in these areas. However, the variable-pitch screw structure of this device eliminates areas of gas accumulation during gas mixing, resulting in optimal mixing results.

[0048] The above is only an embodiment of the present utility model. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the scope of protection of the utility model. These will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A tubular ozone hydrodynamic cavitation gas dissolution device, characterized by: include, Aqueous solution pipeline; an aerator, partially located within the aqueous solution pipeline, for delivering a gaseous oxygenator into the water flow; and The spiral hydrodynamic cavitation component is arranged inside the aqueous solution pipeline and is used to fully mix and dissolve the gas oxygenator and the water flow. The setting direction of the spiral hydrodynamic cavitation component is the same as the axial direction of the aqueous solution pipeline. The spiral hydrodynamic cavitation component includes a rotating shaft, and spiral blades with unequal spacing are arranged on the rotating shaft. The pitch between adjacent spiral blades changes from large to small and then to large according to the direction of the water flow. The blades can rotate unidirectionally under the impact of the water flow.

2. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 1, characterized in that: The aqueous solution pipeline is a straight cylindrical structure.

3. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 2, characterized in that: The aeration element includes a first straight pipe and a second straight pipe. The first straight pipe and the aqueous solution pipeline are arranged perpendicular to each other. The first straight pipe is partially inserted into the aqueous solution pipeline. The second straight pipe is arranged inside the aqueous solution pipeline. The second straight pipe and the aqueous solution pipeline are axially parallel to each other. The first straight pipe and the second straight pipe are connected.

4. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 3, characterized in that: The distance between the second straight tube and the rotating shaft is 70 mm, the diameter of the second straight tube is 10 mm, and the oxygenant is transported to the aqueous solution pipeline through the second straight tube.

5. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 4, characterized in that: The flow rate of the oxygenating agent is the same as that of the water flow, and the oxygenating agent is ozone.

6. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 1, characterized in that: A fixed bracket is provided inside the aqueous solution pipeline, an outer ring of the fixed bracket abuts against the inner wall of the aqueous solution pipeline, and a rotating shaft is rotatably provided in the middle of the fixed bracket.

7. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 6, characterized in that: The rotating shaft includes two first connecting rods, and multiple second connecting rods of different lengths and spliced with each other are arranged between the two first connecting rods. A first plug-in end is provided on the side of the first connecting rod close to the second connecting rod, and the diameter of the first plug-in end is smaller than the diameter of the first connecting rod. One end of the second connecting rod is a hollow end, and a second plug-in end is provided on the other end of the second connecting rod, and the diameter of the second plug-in end is smaller than the diameter of the second connecting rod. The first connecting rod and the second connecting rod have the same diameter. The plug-in end of the first connecting rod is inserted into the hollow end of the adjacent second connecting rod, and the second plug-in end of the second connecting rod is inserted into the hollow end of the adjacent second connecting rod. The two first connecting rods are provided with a crushing head with a conical structure at the ends away from each other, and the tip of the crushing head is aligned with the center of the second straight pipe. Each of the first connecting rod and the second connecting rod is provided with a spiral blade.

8. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 7, characterized in that: The outer diameter of the spiral blade is 50 mm, the inner diameter of the spiral blade is 15 mm, and the spiral blade is arranged in a clockwise direction of 180°.

9. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 8, characterized in that: The pitch between adjacent spiral blades ranges from 100 mm to 250 mm, the minimum pitch between adjacent spiral blades is 100 mm, and the maximum pitch between adjacent spiral blades is 250 mm.

10. The tubular ozone hydrodynamic cavitation gas dissolution device according to claim 1, characterized in that: The aqueous solution pipeline adopts a porcelain core water pipe, and the porcelain core water pipe contains active metal cerium and manganese elements.

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