Ozone preparation device

Abstract

The invention discloses an ozone preparation device. The ozone preparation device comprises an inner pipe, a middle pipe and an outer pipe which are coaxially arranged, the inner pipe comprises a first cooling channel which is coaxially arranged with the inner pipe, a conductive element is arranged on the inner wall of the first cooling channel, and the conductive element is connected with the high-voltage electrode; the middle pipe is sleeved with the outer pipe, a second cooling channel is formed between the outer pipe and the middle pipe, a flowing cooling medium is arranged in the second cooling channel, and a grounding electrode is arranged on the outer pipe; a discharge area is formed between the high-voltage electrode and the grounding electrode, and the intermediate tube is located in the discharge area. According to the scheme, both the outer pipe and the inner pipe are provided with the cooling channels for allowing the cooling medium to flow, so that a dual-cooling structure is formed, the high-voltage electrode and the grounding electrode are cooled, the working temperature of the ozone preparation device is always maintained in a reasonable range, the temperature stability of the ozone preparation device is ensured, and the efficient and stable reaction is ensured; ozonolysis caused by high temperature is reduced, and the production rate of ozone is guaranteed; meanwhile, the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ozone preparation, in particular to an ozone preparation device. BACKGROUND

[0002] Low-temperature plasma technology is a waste gas treatment technology developed in recent years. The principle of treating waste gas by low-temperature plasma technology is as follows:

[0003] When the applied voltage reaches the discharge voltage of the gas, the gas is broken down to produce a mixture including electrons, various ions, atoms and free radicals. Low-temperature plasma degrades pollutants by using these active particles such as high-energy electrons and free radicals to act on pollutants in waste gas, so that the pollutant molecules are decomposed in a very short time to achieve the purpose of degrading pollutants.

[0004] Dielectric barrier discharge (DBD) in low-temperature plasma technology is a kind of non-equilibrium gas discharge with an insulating medium inserted into the discharge space, also known as dielectric barrier corona discharge or silent discharge. DBD can avoid electrode corrosion because the electrode does not directly contact the discharge gas, so it is widely used.

[0005] However, DBD generates a large amount of heat during the discharge process, which increases the temperature of DBD. High temperature leads to thermal decomposition of ozone, affecting the production rate of ozone. SUMMARY

[0006] The present application provides an ozone preparation device to reduce the decomposition of ozone caused by high temperature and improve the production rate of ozone.

[0007] To achieve the above purpose, the present application provides an ozone preparation device comprising an inner tube, an intermediate tube and an outer tube arranged coaxially.

[0008] The inner tube comprises a first cooling channel arranged coaxially with the inner tube, and the inner wall of the first cooling channel is provided with an electrically conductive element connected with a high-voltage electrode.

[0009] The intermediate tube is sleeved outside the inner tube, and a gas cavity is formed between the intermediate tube and the inner tube, wherein the gas cavity comprises an air inlet and an air outlet.

[0010] The outer tube is sleeved outside the intermediate tube, and a second cooling channel is formed between the outer tube and the intermediate tube, and a grounding electrode is arranged on the outer tube.

[0011] Optionally, in the above ozone preparation device, the first cooling channel is respectively provided with an inner liquid inlet and an inner liquid outlet at both ends along the axis direction of the inner tube.

[0012] The gas inlet and the gas outlet are arranged on the wall of the intermediate pipe, and the gas inlet and the gas outlet are located on the same side of the axis of the intermediate pipe.

[0013] The outer inlet and the outer outlet of the second cooling channel are arranged on the wall of the outer pipe, and the outer inlet and the outer outlet are located at two ends of the outer pipe along the radial direction of the outer pipe.

[0014] The outer inlet and the outer outlet are distributed on both sides of the straight line on which the gas inlet and the gas outlet are located.

[0015] Optionally, in the ozone preparation device, a zeolite molecular sieve is arranged in the gas cavity.

[0016] Optionally, in the ozone preparation device, a gas pipe joint is further arranged, and the gas inlet and the gas outlet are arranged on the gas pipe joint.

[0017] The gas pipe joint comprises a first connecting piece, a second connecting piece and a third connecting piece.

[0018] The second connecting piece is sleeved on the intermediate pipe, and the second connecting piece is connected with the first connecting piece and the third connecting piece at two ends along the axis of the inner pipe, respectively, and the second connecting piece comprises a gas channel in communication with the gas inlet or the gas outlet.

[0019] The first connecting piece is fixedly connected with the intermediate pipe, and the third connecting piece is fixedly connected with the inner pipe.

[0020] Optionally, in the ozone preparation device, two ends of the axis of the intermediate pipe comprise an intermediate sleeve, the outer diameter of the intermediate sleeve is smaller than the outer diameter of the intermediate pipe, so as to form a first step surface at the connecting position of the intermediate sleeve and the intermediate pipe, and the gas inlet or the gas outlet is arranged on the intermediate sleeve.

[0021] The second connecting piece comprises a first hole section sleeved with the intermediate pipe and a second hole section sleeved with the intermediate sleeve, and the connecting position of the first hole section and the second hole section forms a second step abutting against the first step.

[0022] Optionally, in the ozone preparation device, the gas pipe joint is a plastic joint.

[0023] Optionally, in the ozone preparation device, water pipe joints are arranged at two ends of the axis of the inner pipe, and the water pipe joints are connected with the inner pipe through a connecting assembly.

[0024] The connecting assembly comprises a connecting pipe and a bushing, the connecting pipe is sleeved with the inner pipe through the bushing, and the water pipe joint is sleeved on the inner pipe and is threadedly connected with the connecting pipe.

[0025] The connecting pipe of one of the connecting assemblies is provided with a mounting hole for mounting the high-voltage electrode, and the connecting pipe for mounting the high-voltage electrode is a stainless steel pipe.

[0026] Optionally, in the ozone preparation device, the outer pipe is provided with a water inlet joint and a water outlet joint at positions corresponding to the outer water inlet and the outer water outlet, respectively.

[0027] The water inlet joint and the water outlet joint are integrally formed with the outer pipe.

[0028] Optionally, in the ozone preparation device, the conductive element is a metal mesh, and the metal mesh is adapted to the shape of the inner cavity of the first cooling channel.

[0029] Optionally, in the ozone preparation device, the inner pipe is at least one of ceramic, glass and quartz.

[0030] The intermediate pipe is at least one of ceramic, glass and quartz.

[0031] The outer pipe is at least one of ceramic, glass and quartz.

[0032] The ozone preparation device provided by the embodiment of the present application comprises an inner pipe, an intermediate pipe and an outer pipe arranged coaxially. The inner pipe comprises a first cooling channel arranged coaxially with the inner pipe, and the inner wall of the first cooling channel is provided with a conductive element connected with a high-voltage electrode. The outer pipe is sleeved outside the intermediate pipe, and the second cooling channel is formed between the outer pipe and the intermediate pipe. The outer pipe is provided with a grounding electrode. The high-voltage electrode and the grounding electrode form a discharge region, and the intermediate pipe is located in the discharge region. The ozone preparation device disclosed by the scheme has the cooling channels for the flow of cooling medium in the outer pipe and the inner pipe, forms a double cooling structure, cools the high-voltage electrode and the grounding electrode, maintains the working temperature of the ozone preparation device in a reasonable range, ensures the temperature stability of the ozone preparation device, ensures the efficient and stable reaction, reduces the ozone decomposition caused by high temperature, ensures the production rate of ozone, and prolongs the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, other drawings can be obtained from the provided drawings without creative labor, and the present application can also be applied to other similar scenarios according to the provided drawings. Unless it is obvious from the language environment or otherwise stated, the same reference numbers in the drawings represent the same structure or operation.

[0034] Figure 1 is a perspective view of the ozone preparation device provided by the embodiments of the present application;

[0035] Figure 2 is a front view of the ozone preparation device provided by the embodiments of the present application;

[0036] Figure 3 is a cross-sectional view of the front view of the ozone preparation device provided by the embodiments of the present application;

[0037] Figure 4 is a side view of the ozone preparation device provided by the embodiments of the present application;

[0038] Figure 5 is a bottom view of the ozone preparation device provided by the embodiments of the present application;

[0039] Figure 6 is a cross-sectional view of the bottom view of the ozone preparation device provided by the embodiments of the present application;

[0040] Figure 7 is a structural schematic view of the inner tube, the intermediate tube and the outer tube provided by the embodiments of the present application.

[0041] wherein:

[0042] 1 - inner tube; 11 - first cooling channel; 2 - intermediate tube; 21 - gas cavity; 22 - gas inlet; 23 - gas outlet; 24 - intermediate sleeve; 25 - first step surface; 3 - outer tube; 31 - second cooling channel; 32 - water inlet connector; 33 - water outlet connector; 4 - high voltage electrode; 5 - grounding electrode; 6 - connector; 61 - first connecting piece; 62 - second connecting piece; 63 - third connecting piece; 7 - water pipe connector; 8 - connecting assembly; 81 - connecting pipe; 82 - bushing. DETAILED DESCRIPTION

[0043] The application will be described in further detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended for explaining the related application, but not limiting the application. The described embodiments are only a part of the embodiments of the application, but not all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the application.

[0044] It should be noted that, for the convenience of description, only parts related to the application are shown in the drawings. The embodiments in the application and the features in the embodiments can be combined with each other without conflict.

[0045] It should be understood that the "system", "device", "unit" and / or "module" used in the application is a method for distinguishing different components, elements, parts, sections or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0046] As shown in the application and claims, unless the context clearly indicates otherwise, "one", "a", "an" and / or "the" do not refer to the singular, but also include the plural. Generally, the terms "comprise" and "include" only indicate that the steps and elements explicitly identified are included, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, product or device comprising the element.

[0047] In the description of the embodiments of the application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B; "and / or" in this paper is only a description of the association between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, and B exists alone. In addition, in the description of the embodiments of the application, "multiple" means two or more than two.

[0048] Hereinafter, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more features.

[0049] Ozone is a strong oxidizing gas, which is widely used in sterilization and disinfection and degradation of pollutants.

[0050] The ozone preparation device disclosed in the scheme is used for preparing ozone, and is a coaxial dielectric barrier discharge plasma ozone preparation device with optimized structure, good cooling effect and high discharge efficiency. The ozone preparation device comprises an inner tube 1, an intermediate tube 2 and an outer tube 3, and the inner tube 1, the intermediate tube 2 and the outer tube 3 are coaxially arranged.

[0051] Please refer to Figure 3 and Figure 4 The inner tube 1 is located in the innermost layer, the inner tube 1 is sleeved with the intermediate tube 2, and the intermediate tube 2 is sleeved with the outer tube 3.

[0052] The inner tube 1 comprises a first cooling channel 11 coaxially arranged with the inner tube 1, and the inner wall of the first cooling channel 11 is provided with a conductive element connected with the high-voltage electrode 4. Optionally, the conductive element is a metal mesh which is tightly combined with the inner cavity of the first cooling channel 11 after being expanded, and the metal mesh is an iron mesh. The conductive element is not limited to the metal mesh, but can also be a conductive layer arranged on the channel wall of the first cooling channel 11.

[0053] The first cooling channel 11 is filled with flowing cooling medium. In the circuit path, the high-voltage electrode 4 delivers high voltage to the conductive element, and the whole formed by the conductive element, the cooling medium and the inner tube 1 serves as the high-voltage electrode 4.

[0054] The outer tube 3 is sleeved outside the intermediate tube 2, and the second cooling channel 31 is formed between the outer tube 3 and the intermediate tube 2, the second cooling channel 31 is filled with flowing cooling medium, and the grounding electrode 5 is arranged on the outer tube 3. The whole formed by the outer tube 3 and the cooling medium of the second cooling cavity serves as the grounding electrode.

[0055] The discharge region is formed between the high-voltage electrode 4 and the grounding electrode. In some embodiments, the outer diameter of the outer tube 3 is 30 mm, the inner diameter is 25 mm, the outer diameter of the inner tube 1 is 15 mm, the inner diameter is 10 mm, the discharge gap of the discharge region is 5 mm, and the effective discharge width is 30 mm, forming a uniform and stable discharge field.

[0056] The intermediate tube 2 is located in the discharge region, and the intermediate tube 2 serves as a dielectric body which is the main component of dielectric barrier discharge, and the dielectric barrier is a dielectric barrier. The intermediate tube 2 is sleeved outside the inner tube 1, and the gas cavity 21 is formed between the intermediate tube 2 and the inner tube 1. The gas cavity 21 comprises a gas inlet 22 and a gas outlet 23, and the gas is supplied into the gas cavity 21 through the gas inlet 22, ozone is generated under the action of discharge, and the mixture of ozone and gas is discharged from the gas cavity 21 through the gas outlet 23. The gas is generally air or oxygen.

[0057] The outer wall of the part corresponding to the position of the inner tube 1 and the intermediate tube 2 serves as the inner wall of the intermediate tube 2, which can effectively suppress the formation of local arc discharge and improve the discharge uniformity.

[0058] Please refer to Figure 3The inner tube 1 comprises a first cooling channel 11, and the cooling medium of the first cooling channel 11 absorbs the heat of the high-voltage electrode 4 to cool the high-voltage electrode 4. The outer tube 3 comprises a second cooling channel 31, and the cooling medium of the second cooling channel 31 absorbs the heat of the ground electrode to cool the ground electrode. The first cooling channel 11 and the second cooling channel 31 are respectively located on the inner and outer sides of the gas cavity 21, and the first cooling channel 11, the second cooling channel 31 and the gas cavity 21 are independent of each other, that is, the water path and the gas path are independently distributed and do not interfere with each other.

[0059] The ozone preparation device disclosed in the scheme has the cooling channels for the flow of the cooling medium in the outer tube 3 and the inner tube 1, forms a double cooling structure, realizes the cooling of the high-voltage electrode 4 and the ground electrode, ensures that the working temperature of the ozone preparation device is always maintained within a reasonable range, ensures the temperature stability of the ozone preparation device, ensures that the reaction is efficient and stable, reduces the ozone decomposition caused by high temperature, and ensures the production rate of ozone. At the same time, the service life of the equipment is prolonged.

[0060] The inner tube 1, the intermediate tube 2 and the outer tube 3 are coaxially arranged, the intermediate tube 2 supports the inner tube 1 and the outer tube 3, the outer wall of the inner tube 1 is equal in distance to the inner wall of the outer tube 3 at each position in the circumferential direction, the discharge region is uniformly distributed, and the reaction speed of oxygen into ozone is ensured.

[0061] Please continue to refer to Figure 5 、 Figure 6 and Figure 7 .

[0062] The first cooling channel 11 comprises an inner inlet and an inner outlet, and the inner inlet and the inner outlet are located at both ends of the first cooling channel 11 in the axial direction of the inner tube 1. The cooling medium enters the first cooling channel 11 through the inner inlet, and the cooling medium is discharged from the first cooling channel 11 through the inner outlet after heat exchange. The cooling medium flows in the first cooling channel 11 and continuously exchanges heat with the high-voltage electrode 4.

[0063] The second cooling channel 31 comprises an outer inlet and an outer outlet, and the outer inlet and the outer outlet are located on the pipe wall of the outer tube 3 and are located at both ends of the outer tube 3 in the radial direction of the outer tube 3. The cooling medium enters the second cooling channel 31 through the outer inlet, and the cooling medium is discharged from the second cooling channel 31 through the outer outlet after heat exchange. The cooling medium flows in the second cooling channel 31 and continuously exchanges heat with the ground electrode. The first cooling channel 11 and the second cooling channel 31 are integrated in the inner tube 1 and the outer tube 3 respectively, which reduces the volume of the ozone preparation device in the radial direction of the inner tube 1 under the premise of meeting the cooling.

[0064] The cooling medium of the outer tube 3 and the inner tube 1 can be the same or different. Optionally, the cooling medium is water.

[0065] The outer tube 3 and the inner tube 1 can use the same cooling medium supply device or each be equipped with a cooling medium supply device.

[0066] The gas inlet 22 and the gas outlet 23 of the gas cavity 21 are arranged on the wall of the intermediate tube 2, and the gas inlet 22 and the gas outlet 23 are located on the same side of the axis direction of the intermediate tube 2, and the gas inlet 22 and the gas outlet 23 are respectively located at both ends of the axis direction of the intermediate tube 2.

[0067] As shown in Figure 2 , Figure 3 , Figure 5 and Figure 6 , the outer liquid inlet and the outer liquid outlet are located on both sides of the straight line where the gas inlet 22 and the gas outlet 23 are located, that is, the outer liquid inlet, the outer liquid outlet and the gas inlet 22 are distributed in the circumferential direction of the inner tube 1, which reduces the difficulty of layout of the gas inlet 22 and the gas outlet 23 and the outer liquid inlet and the outer liquid outlet, and reduces the mutual interference between the gas path and the water path.

[0068] In this scheme, the outer tube 3 is located between the gas inlet 22 and the gas outlet 23 of the intermediate tube 2, the length of the inner tube 1 is greater than the length of the intermediate tube 2, and the length of the intermediate tube 2 is greater than the length of the outer tube 3. Optionally, the gas inlet 22 and the gas outlet 23 are located at both ends of the length direction of the intermediate tube 2 to increase the length of the part of the intermediate tube 2 for mounting the outer tube 3. The longer the length of the outer tube 3, the larger the area of the discharge region formed by the outer tube 3 and the inner tube 1, and the higher the production efficiency of ozone.

[0069] In other embodiments, the gas inlet 22 and the gas outlet 23 are arranged on the wall of the intermediate tube 2, and the outer liquid inlet and the outer liquid outlet are arranged on the end face of the outer tube 3.

[0070] In other embodiments, the gas inlet 22 and the gas outlet 23 are arranged on the end face of the intermediate tube 2, and the outer liquid inlet and the outer liquid outlet are arranged on the wall of the outer tube 3.

[0071] In other embodiments, the gas inlet 22 and the gas outlet 23 are arranged on the end face of the intermediate tube 2, and the outer liquid inlet and the outer liquid outlet are arranged on the end face of the outer tube 3, and the gas inlet 22 and the gas outlet 23 and the outer liquid inlet and the outer liquid outlet are distributed in the end face of the inner tube 1.

[0072] The arrangement of the gas inlet 22, the gas outlet 23, the outer liquid inlet and the outer liquid outlet is not limited to the above embodiments, but can also be other ways, for example, the gas inlet 22 is located on the end face of the intermediate tube 2, the gas outlet 23 is located on the wall of the intermediate tube 2, the outer liquid inlet is arranged on the wall of the outer tube 3, and the inner liquid inlet is arranged on the end face of the outer tube 3, etc., all of which are within the scope of the present application.

[0073] Optionally, the gas cavity 21 is filled with zeolite molecular sieve. The zeolite molecular sieve promotes the activation and adsorption of oxygen molecules through its unique porous structure and surface properties, further improving the ozone generation rate and enhancing the selectivity and efficiency of the reaction. Experiments show that after filling the discharge area with zeolite molecular sieve, the ozone production concentration is significantly increased from 1.276% to 2.799%.

[0074] The zeolite molecular sieve can be at least one of a sodium type zeolite molecular sieve, a calcium type zeolite molecular sieve and a potassium type zeolite molecular sieve.

[0075] The preparation process of the zeolite molecular sieve is as follows:

[0076] a. Raw material mixing: sodium silicate, sodium aluminate and NaOH are mixed in a ratio of SiO2:Al2O3:Na2O=2:1:1. During the mixing process, chemical reactions occur between the raw materials SiO2, Al2O3 and Na2O, gradually forming a gel-like substance;

[0077] b. Hydrothermal crystallization of the gel-like substance in step a: The gel-like substance is transferred to a reaction kettle, ensuring good sealing performance of the reaction kettle; The reaction kettle is placed in an environment of 80-90°C for crystallization reaction. Under hydrothermal conditions, the molecules in the gel-like substance will arrange and grow in a certain pattern, gradually forming the crystal structure of the sodium type zeolite molecular sieve. The crystallization time is set to 10-14 hours to generate sodium type zeolite molecular sieve powder;

[0078] c. Washing and drying the sodium type zeolite molecular sieve powder: After the crystallization reaction is completed, the sodium type zeolite molecular sieve powder is taken out and washed with water. The purpose of water washing is to remove impurities and unreacted raw materials on the surface of the sodium type zeolite molecular sieve powder until the washed solution is neutral. After water washing, the sodium type zeolite molecular sieve powder is placed in a drying device and dried at a temperature of 100-140°C. Drying can remove water from the powder to keep it dry;

[0079] d. Ion exchange to obtain potassium type zeolite molecular sieve, calcium type zeolite molecular sieve, calcium type zeolite molecular sieve powder and potassium type zeolite molecular sieve powder. The ion exchange reaction is carried out using sodium type zeolite molecular sieve powder as raw material:

[0080] Specifically, the dried sodium type zeolite molecular sieve powder is immersed in a KCl solution with a concentration of 1.0 mol / L for 68-76 hours. During the soaking process, K + in the solution will replace Na + in the sodium type zeolite molecular sieve through a displacement reaction, replacing Na + with K + to obtain potassium type zeolite molecular sieve powder;

[0081] After drying, the sodium-type zeolite molecular sieve powder is immersed in a CaCl2 solution with a concentration of 0.5 mol / L for 68-76 hours. During the immersion process, Ca² + in the solution will replace Na + in the sodium-type zeolite molecular sieve, replacing Na + with Ca² + , to obtain calcium-type zeolite molecular sieve powder;

[0082] e. Dehydration: After ion exchange is completed, the sodium-type zeolite molecular sieve powder, the calcium-type zeolite molecular sieve powder, and the potassium-type zeolite molecular sieve powder are respectively placed in a calcination device for calcination treatment at a temperature of 280-320°C for 3-5 hours. High-temperature calcination can further remove residual water in the molecular sieve powder and possible impurities introduced during preparation, improving the purity and stability of the molecular sieve;

[0083] f. Sieving: The calcined molecular sieve powder may have certain agglomeration, which needs to be crushed to make the powder particles smaller and more uniform. After crushing, the powder is sieved through a 200-mesh sieve, which corresponds to a particle size of ≤75 μm. Sieving ensures that the final molecular sieve powder has uniform particle size, avoiding the impact of particle size differences on subsequent experimental results;

[0084] g. Mixing and kneading: The sieved molecular sieve powder is placed in a double-screw mixing machine, and deionized water is added at a rate of 20-30 mL / min to perform mixing and kneading. The kneading time is controlled at 15-20 minutes. During kneading, the powder and water are fully mixed, gradually forming a dough-like material that meets the standard of holding together and scattering upon touching, to ensure smooth subsequent molding process;

[0085] h. Ball molding: The kneaded dough-like material is placed in a centrifugal ball machine for ball molding. In the balling process, a 10%-12% pseudo-boehmite solution is sprayed as a binder in an atomized manner. The binder can bond the material particles to form a ball. The initial speed of the ball machine is set at 50-60 rpm, and the ball molding time is 90-100 minutes. After molding, the speed of the ball machine is reduced to 20 rpm for tumbling treatment for 5-6 minutes, making the ball surface smoother and rounder;

[0086] i.Drying activation: the zeolite molecular sieve spheres after rolling ball forming need to be dried and activated, and the spheres are placed in a drying device and dried at a temperature of 100-120 DEG C for 16-20 hours. Through drying and activation, the water in the spheres can be removed, and the structural stability and adsorption performance of the zeolite molecular sieve can be further enhanced, so that it can better play a role.

[0087] The components of the sodium type zeolite molecular sieve, the calcium type zeolite molecular sieve and the potassium type zeolite molecular sieve are as follows:

[0088]

[0089] The performance of the sodium type zeolite molecular sieve, the calcium type zeolite molecular sieve and the potassium type zeolite molecular sieve is tested by an X-ray fluorescence spectrometer.

[0090] Experiments show that the ozone generation device using the sodium type zeolite molecular sieve has the most significant promoting effect on ozone generation, and the ozone generation concentration is significantly increased from 1.276% to 2.799%.

[0091] It should be noted that the connection position of the intermediate pipe 2 and the inner pipe 1, and the connection position of the outer pipe 3 and the intermediate pipe 2 need to be sealed to ensure the sealing of the gas cavity 21 and the second cooling channel 31.

[0092] Optionally, the two ends of the outer pipe 3 in the axial direction include an outer sleeve, the outer diameter of the outer sleeve is smaller than the outer diameter of the outer pipe 3, the outer sleeve is sleeved outside the intermediate pipe 2, and the outer sleeve is sealingly connected with the intermediate pipe 2.

[0093] The ozone preparation device disclosed in the scheme further includes a gas pipe joint 6, and the gas inlet 22 and the gas outlet 23 are provided with the gas pipe joint 6 to reduce the connection difficulty of the gas inlet 22 and the gas outlet 23 with the gas pipeline.

[0094] Continuing to refer to Figure 1 and Figure 3 , the gas pipe joint 6 includes a first connecting piece 61, a second connecting piece 62 and a third connecting piece 63. The first connecting piece 61, the second connecting piece 62 and the third connecting piece 63 are sequentially sleeved from the end of the intermediate pipe 2, and the second connecting piece 62 is located between the first connecting piece 61 and the second connecting piece 62.

[0095] The second connecting piece 62 includes a gas passage in communication with the gas inlet 22 or the gas outlet 23. The second connecting piece 62 is sleeved on the intermediate pipe 2, and the gas passage is in position correspondence and communication with the gas inlet 22 or the gas outlet 23.

[0096] For the convenience of subsequent description, the end of the second connecting piece 62 matched with the first connecting piece 61 is named as the first end, and the end of the second connecting piece 62 matched with the third connecting piece 63 is named as the second end. For the convenience of subsequent description, the end of the second connecting piece 62 matched with the first connecting piece 61 is named as the first end, and the end of the second connecting piece 62 matched with the third connecting piece 63 is named as the second end.

[0097] The first connecting piece 61 is fixedly connected with the intermediate pipe 2 or the sleeve pipe. After the second connecting piece 62 is connected with the first connecting piece 61, the first end of the second connecting piece 62 is fixed. The third connecting piece 63 is fixedly connected with the inner pipe 1. After the second connecting piece 62 is connected with the third connecting piece 63, the second end of the second connecting piece 62 is fixed.

[0098] In some embodiments, the first connecting piece 61 comprises a through hole which is sleeved with the intermediate pipe 2 or the sleeve pipe. An inner thread is arranged on the hole wall of the through hole. The intermediate pipe 2 or the sleeve pipe has an outer thread which is matched with the inner thread. The first connecting piece 61 is fixedly connected with the intermediate pipe 2 or the sleeve pipe through the outer thread matched with the inner thread.

[0099] The first connecting piece 61 further comprises an outer cylinder which is used to be sleeved with the first end of the second connecting piece 62. The outer cylinder is connected with the first end of the second connecting piece 62 through thread connection or clamping or riveting.

[0100] The third connecting piece 63 comprises a through hole which is sleeved with the inner pipe 1 or the intermediate sleeve pipe. An inner thread is arranged on the hole wall of the through hole. The inner pipe 1 or the intermediate sleeve pipe has an outer thread which is matched with the inner thread. The third connecting piece 63 is fixedly connected with the inner pipe 1 or the intermediate sleeve pipe through the outer thread matched with the inner thread.

[0101] Please continue to refer to Figure 3 The two ends of the intermediate pipe 2 in the axial direction comprise an intermediate sleeve pipe 24. The outer diameter of the intermediate sleeve pipe 24 is smaller than the outer diameter of the intermediate pipe 2. The connection position of the intermediate sleeve pipe 24 and the intermediate pipe 2 forms a first step surface 25.

[0102] The first end of the second connecting piece 62 is sleeved outside the intermediate sleeve pipe 24. The second end of the second connecting piece 62 is sleeved outside the inner pipe 1. The communication position of the first hole section of the second connecting piece 62 matched with the intermediate sleeve pipe 24 and the second hole section of the second connecting piece 62 matched with the inner pipe 1 forms a second step surface. The second step surface is adaptively shaped with the first step surface 25. The first step surface 25 and the second step surface are matched. The matching of the first step surface 25 and the second step surface plays a limiting role in the installation of the second connecting piece 62 in the intermediate pipe 2. When the first step surface 25 and the second step surface abut, the gas passage of the second connecting piece 62 is directly opposite to the air inlet 22 or the air outlet 23, thereby reducing the installation difficulty of the gas pipe joint 6.

[0103] Optionally, a sealing piece is arranged between the first hole section and the intermediate sleeve pipe 24. A sealing piece is arranged between the second hole section and the inner pipe 1.

[0104] During installation, first, the first connecting piece 61 is sleeved on the intermediate pipe 2, then the second connecting piece 62 is sleeved on the intermediate pipe 2, the second step surface of the second connecting piece 62 abuts against the first step surface 25, the first connecting piece 61 is rotated to realize the connection of the first connecting piece 61 with the intermediate pipe 2 or the outer sleeve pipe and the connection of the first connecting piece 61 with the first end of the second connecting piece 62, finally, the third connecting piece 63 is sleeved on the inner pipe 1, the third connecting piece 63 is rotated to realize the connection of the third connecting piece 63 with the inner pipe 1 and the connection of the third connecting piece 63 with the second connecting piece 62.

[0105] Since ozone is corrosive, the first connecting piece 61, the second connecting piece 62 and the third connecting piece 63 of the gas pipe joint 6 are made of plastic material, which can be polytetrafluoroethylene or polyfluoroethylene propylene.

[0106] Both ends of the inner pipe 1 in the axial direction are provided with water pipe joints 7, which are used to reduce the connection difficulty of the liquid supply pipeline with the water pipe joint 7.

[0107] Optionally, the water pipe joint 7 is connected with the inner pipe 1 through a connecting assembly 8. As shown in Figure 3 and Figure 6 the connecting assembly 8 includes a connecting pipe 81 and an inner sleeve 82, the connecting pipe 81 is connected with the inner pipe 1 through the inner sleeve 82. The inner sleeve 82 is T-shaped, including a ring plate and a cylinder connected with the inner ring of the ring plate, the diameter of the outer ring of the ring plate is larger than the diameter of the cylinder, and the inner wall of the connecting pipe 81 includes a clamping groove matched with the ring plate. The inner sleeve 82 is installed in the connecting pipe 81 through the clamping groove, the inner sleeve 82 is sleeved on the inner pipe 1, and the connecting pipe 81 is in interference fit with the inner pipe 1 through the inner sleeve 82. The inner sleeve 82 is made of elastic flexible material such as rubber.

[0108] The end of the connecting pipe 81 close to the water pipe joint 7 is provided with an internal thread, and a space for installing the water pipe joint 7 is formed between the connecting pipe 81 and the inner pipe 1. The water pipe joint 7 is sleeved on the inner pipe 1, and the water pipe joint 7 is provided with an external thread, and the water pipe joint 7 is connected with the connecting rod through the internal thread matched with the external thread.

[0109] The high-voltage electrode 4 is arranged on one of the connecting assemblies 8, specifically, a mounting hole for the high-voltage electrode 4 is formed on the connecting pipe 81, and a sealing element is arranged between the high-voltage electrode 4 and the mounting hole. Optionally, the connecting pipe 81 is a stainless steel pipe, which can be stainless steel 316;

[0110] The connecting pipe 81 of the other connecting assembly 8 is a plastic pipe.

[0111] The outer pipe 3 is provided with a water inlet joint 32 and a water outlet joint 33 at positions corresponding to the outer water inlet and the outer water outlet. Optionally, the water inlet joint 32 and the water outlet joint 33 are integrally formed with the outer pipe 3.

[0112] The inner tube 1 is at least one of ceramic, glass and quartz;

[0113] The intermediate tube 2 is at least one of ceramic, glass and quartz;

[0114] The outer tube 3 is at least one of ceramic, glass and quartz.

[0115] The inner tube 1, the intermediate tube 2 and the outer tube 3 can be made of the same material or non-same material.

[0116] The ozone preparation device has the characteristics of uniform discharge, efficient cooling, small size and the like, and is suitable for water treatment, air purification and the like.

[0117] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used, and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. The scope of the application involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the above application concept. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An ozone generation apparatus, characterized by comprising: The coaxial inner tube (1), intermediate tube (2) and outer tube (3) are arranged; The inner tube (1) comprises a first cooling channel (11) coaxially arranged with the inner tube (1), and an inner wall of the first cooling channel (11) is provided with an electrically conductive element connected with a high-voltage electrode (4); The intermediate tube (2) is sleeved outside the inner tube (1), and a gas cavity (21) is formed between the intermediate tube (2) and the inner tube (1), the gas cavity (21) comprises an air inlet (22) and an air outlet (23); The outer tube (3) is sleeved outside the intermediate tube (2), and a second cooling channel (31) is formed between the outer tube (3) and the intermediate tube (2), and a grounding electrode (5) is arranged on the outer tube (3).

2. The ozone generation device of claim 1, wherein The first cooling channel (11) is respectively provided with an inner liquid inlet and an inner liquid outlet at both ends in the axial direction of the inner tube (1); The air inlet (22) and the air outlet (23) are arranged on the tube wall of the intermediate tube (2), and the air inlet (22) and the air outlet (23) are located on the same side of the axial direction of the intermediate tube (2); The outer liquid inlet and the outer liquid outlet of the second cooling channel (31) are arranged on the tube wall of the outer tube (3), and the outer liquid inlet and the outer liquid outlet are located at both ends of the outer tube (3) in the radial direction of the outer tube (3); The outer liquid inlet and the outer liquid outlet are distributed on both sides of a straight line on which the air inlet (22) and the air outlet (23) are located.

3. The ozone generation device of claim 1, wherein The gas cavity (21) is provided with a zeolite molecular sieve.

4. The ozone generation device of claim 1, wherein It also comprises a gas pipe joint (6), and the air inlet (22) and the air outlet (23) are both provided with the gas pipe joint (6); The gas pipe joint (6) comprises a first connecting piece (61), a second connecting piece (62) and a third connecting piece (63); The second connecting piece (62) is sleeved on the intermediate tube (2), and the second connecting piece (62) is connected with the first connecting piece (61) and the third connecting piece (63) at both ends in the axial direction of the inner tube (1), respectively, and the second connecting piece (62) comprises a gas channel in communication with the air inlet (22) or the air outlet (23); The first connecting piece (61) is fixedly connected with the intermediate tube (2), and the third connecting piece (63) is fixedly connected with the inner tube (1).

5. The ozone generation device of claim 4, wherein Both ends of the intermediate tube (2) in the axial direction comprise an intermediate sleeve (24), the outer diameter of the intermediate sleeve (24) is smaller than the outer diameter of the intermediate tube (2), so as to form a first step surface (25) at the connection position of the intermediate sleeve (24) and the intermediate tube (2), and the air inlet (22) or the air outlet (23) is arranged on the intermediate sleeve (24); The second connecting piece (62) comprises a first hole section sleeved with the intermediate tube (2) and a second hole section sleeved with the intermediate sleeve (24), and the connection position of the first hole section and the second hole section forms a second step abutting against the first step.

6. The ozone generation device of claim 4, wherein The gas pipe joint (6) is a plastic joint.

7. The ozone generation device of claim 1, wherein Both ends of the inner tube (1) in the axial direction are provided with water pipe joints (7), the water pipe joints (7) are connected with the inner tube (1) through connecting assemblies (8); The connecting assembly (8) comprises a connecting pipe (81) and a bushing (82), the connecting pipe (81) is connected with the inner tube (1) through the bushing (82), the water pipe joint (7) is sleeved on the inner tube (1) and connected with the connecting pipe (81); The connecting pipe (81) of one of the connecting assemblies (8) is provided with a mounting hole for mounting the high-voltage electrode (4), the connecting pipe (81) for mounting the high-voltage electrode (4) is a stainless steel pipe, and the connecting pipe (81) of the other connecting assembly (8) is a plastic pipe.

8. The ozone generation device of claim 1, wherein, The outer pipe (3) is provided with a water inlet joint (32) and a water outlet joint (33) corresponding to the positions of the outer water inlets and the outer water outlets respectively; The water inlet joint (32) and the water outlet joint (33) are integrally formed with the outer pipe (3).

9. The ozone generation device of claim 1, wherein, The conductive element is a metal mesh, and the metal mesh is matched with the shape of the inner cavity of the first cooling channel (11).

10. The ozone generation device of claim 1, wherein, The inner tube (1) is at least one of ceramic, glass and quartz; The intermediate tube (2) is at least one of ceramic, glass and quartz; The outer pipe (3) is at least one of ceramic, glass and quartz.

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