An experimental device and method for analyzing heterogeneous ozone treated wastewater

Abstract

The present invention provides an experimental device and method for analyzing heterogeneous ozone-treated wastewater. The device includes a shell, a winding mechanism, and a stirring mechanism. An aeration wheel and a gear ring are provided at the bottom of the shell. The stirring mechanism includes a center rod and a contraction component. The present invention uses the arrangement of the winding mechanism and the stirring mechanism to quickly separate the catalyst from the wastewater when the experiment is completed. Moreover, by using the arrangement of rotating blades and a second sieve plate, the catalyst can be squeezed after separation to further remove the wastewater. The arrangement of the aeration wheel, the gear ring, and the second baffle makes it more convenient to take multiple groups of samples during the experiment, and reduces the frequent operations of the experimenters.

Description

Technical Field

[0001] The present invention relates to the technical field of heterogeneous ozone catalysis, and in particular to an experimental device and a method for analyzing heterogeneous ozone treated wastewater. Background Art

[0002] In recent years, with the development of industry, new challenges have emerged in water treatment and water pollution control. Due to the presence of some biodegradable or toxic organic pollutants (such as pesticides, synthetic detergents, and certain dyes) in industrial wastewater, environmental protection and related departments have established strict standards and laws to protect the environment and water resources and ensure the reuse of treated polluted water. In many cases, industrial wastewater must undergo tertiary advanced treatment to meet the requirements of water pollution control and wastewater reuse.

[0003] As one of the most effective methods for deep wastewater treatment, ozone treatment of wastewater has attracted widespread attention due to its strong oxidation capacity, fast reaction speed, ease of use, and lack of secondary pollution. The petrochemical industry is closely linked to social development, and its byproducts include refined oil and chemical raw materials, making it a very important industry.

[0004] Compared with homogeneous catalytic ozone oxidation technology, heterogeneous catalytic ozone oxidation technology has more prominent advantages in its catalysts, such as effectively improving the mineralization rate of organic matter, reducing water treatment costs, and facilitating recycling and treatment, so this technology has received more attention. In heterogeneous catalytic ozone oxidation reactions, metal oxide catalysts, supported catalysts, mineral or modified mineral catalysts, and activated carbon catalysts are the four most widely used types. Most existing experimental devices require a solid-liquid separation step after adding a solid catalyst to remove the catalyst from the wastewater, and during the implementation process, it is necessary to regularly sample and collect the waste liquid after catalytic treatment, so the experimenters need to operate frequently, which is more troublesome when conducting multiple experiments. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an experimental device and method for analyzing heterogeneous ozone treated wastewater.

[0006] The technical solution of the present invention is: an experimental device for analyzing heterogeneous ozone treated wastewater, comprising a shell and a stirring mechanism,

[0007] A first sieve plate is provided at the upper portion of the housing, and a second sieve plate is slidably provided at the lower portion of the housing, with a filter membrane provided on the second sieve plate. Through the above arrangement, wastewater can pass through the second sieve plate and the filter membrane to filter out the catalyst, and the gas first passes through the second sieve plate into the middle portion of the housing, and then is discharged to the gas outlet through the first sieve plate.

[0008] The stirring mechanism is arranged in the shell between the first sieve plate and the second sieve plate, and the stirring mechanism includes a center rod vertically arranged on the bottom surface of the shell and a contraction assembly slidably connected to the center rod, the top end of the center rod is rotatably connected to the first sieve plate, and the bottom end of the center rod passes through the second sieve plate and is rotatably connected to the bottom surface of the shell, and the second sieve plate is slidably connected to the center rod; the contraction assembly includes multiple groups of rotating blades and multiple groups of scissor arms arranged vertically, each group of scissor arms includes a first connecting rod and a second connecting rod, and the upper and lower ends of the first connecting rod and the second connecting rod are respectively rotatably connected, and the two groups of connections are respectively rotatably sleeved on a group of sleeves; a support rod for passing through the sleeve is provided on the end edge of the rotating blade, the support rod is rotatably connected to the sleeve, and the end face of the support rod is provided with a bending rod The cam is secured to the bottom of the second support frame and is adapted to engage the first and second support members of the first and second support members, and the cam is secured to the bottom of the second support frame and is adapted to engage the second and second support members of the second support frame.

[0009] The top surface of the shell is provided with an air outlet, the shell between the first sieve plate and the second sieve plate is connected to a liquid inlet pipe, the bottom of the shell is provided with an air inlet pipe, and the bottom surface of the shell is provided with a liquid outlet.

[0010] An aeration wheel is sleeved on the central rod at the bottom of the shell, and the aeration wheel is engaged with a positioning pin provided on the central rod. The aeration wheel passes through the bottom surface of the shell through a connecting pipe and is connected to the shell in a rotational seal. The air inlet pipe is connected to the aeration wheel in a rotational seal. The connecting pipe is driven to rotate by a motor provided outside the shell.

[0011] The aeration wheel is hollow inside, and a plurality of groups of air holes are provided on the upper end surface of the aeration wheel. The bottom surface of the shell is provided with a gear and a gear ring that mesh with the aeration wheel. The gear ring and the aeration wheel are located at the same center of a circle, and the inner surface of the gear ring is provided with teeth that mesh with the gear. Through the above arrangement, the gear ring rotates differentially by rotating the aeration wheel. The gear ring is rotatably connected to the bottom surface of the shell through a circular ring.

[0012] The cam is secured to the upper edge of the first support frame and is secured to the lower edge of the first support frame by a spring, the cam being secured to the lower edge of the first support frame and being secured to the lower edge of the first support frame. The lower end surface of the first sieve plate is rotatably connected, the second connecting line passes through the first sieve plate and is connected to the winding rod, the first sieve plate is hollow inside and is provided with a protrusion, the protrusion is connected to the inner wall of the first sieve plate through a second spring, and a first connecting line is provided on the protrusion, and a first baffle is provided on the bottom surface of the shell body located at the liquid outlet and is slidably connected to the bottom surface of the shell body, and a first stopper is provided on the first baffle plate and fixedly connected thereto, and the first stopper is connected to the first connecting line; the inner surface of the circular ring is provided with a first shift block for cooperating with the first stopper to make the first baffle move horizontally, and through the setting of the first shift block, when the circular ring rotates to the first stopper position, the first shift block shifts the first stopper to open the first baffle;

[0013] Through the above arrangement, the liquid outlet can be opened for liquid discharge by pushing the first stopper; when the first connecting line pulls the protrusion, the protrusion is disconnected from the groove, and under the action of the first spring, the housing is separated from the first sieve plate, and the slider moves upward along the groove, so that the rotating wheel drives the winding rod to rotate;

[0014] Furthermore, the outer wall of the bottom end of the shell is provided with multiple groups of sampling ports, and each group of sampling ports is provided with a second baffle, which is slidably connected to the inner wall of the shell located at the sampling port, and the second baffle is provided with a second block connected thereto by a torsion spring, and the outer side surface of the ring is provided with a second shift block for cooperating with the second stop block to make the second baffle slide; the second baffle is connected to the inner wall of the shell through a third spring. Through the setting of multiple groups of sampling ports, when the gear ring rotates, the second shift block shifts the second block, causing the second baffle to slide open, so that multiple groups of sampling can be performed at intervals.

[0015] Furthermore, the pore size of the filter membrane is 0.45 μm.

[0016] Furthermore, the connecting pipe is connected to the output shaft of the motor through a transmission belt.

[0017] Furthermore, the shell is made of glass material.

[0018] Furthermore, the air inlet pipe is connected to an ozone device, which includes a flow meter, an ozone concentration detector, an ozone generator and an oxygen cylinder which are sequentially connected to the air inlet pipe through pipelines, and the air outlet is connected to an ozone destroyer. Through the above settings, the experiment can be effectively carried out completely.

[0019] The present invention also provides a method for analyzing heterogeneous ozone treatment wastewater using the above-mentioned experimental device, comprising the following steps:

[0020] S1: wastewater and catalyst are added to the shell through the liquid inlet pipe, the motor is turned on to stir the wastewater with the catalyst, and at the same time, ozone is introduced into the aeration wheel through the air inlet pipe, and the wastewater with the catalyst is aerated by the aeration wheel;

[0021] S2: Start the reeling mechanism to reel in the second connecting line, and the contraction assembly and the second sieve plate move upwards. The separated catalyst and liquid sample are separated by the filter membrane on the second sieve plate, and the liquid sample discharged from the liquid outlet pipe is collected; press the connecting rod to reset the second sieve plate.

[0022] S3: Repeat steps S1-S2, and perform multiple sets of repeated experiments using the separated catalyst to obtain multiple sets of liquid samples;

[0023] S4: Analyze each of the liquid samples to determine the concentration of specific organic matter, TOC value, UV 254 Any one or more of the value, three-dimensional fluorescence intensity and characteristic organic matter are used to obtain data and conduct comprehensive analysis to evaluate the catalytic ozone efficiency.

[0024] The beneficial effects of the present invention are:

[0025] (1) The present invention can quickly separate the catalyst from the wastewater when the experiment is completed by setting up the winding mechanism and the stirring mechanism, and the catalyst can be squeezed after separation to further remove the wastewater by setting up the rotating blades and the second sieve plate.

[0026] (2) The present invention facilitates multiple sampling during the experiment by providing the aeration wheel, the gear ring and the second baffle, thereby reducing the frequent operations of the experimenters. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 Schematic diagram of the appearance of embodiment 2 of the present invention;

[0028] Figure 2 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the winding mechanism of the present invention;

[0030] Figure 4It is a schematic diagram of the structure of the shrinkage component of the present invention;

[0031] Figure 5 It is a schematic diagram of the structure of the shrinkage component of the present invention;

[0032] Figure 6 This is a schematic diagram of the appearance of the rotating blade of the present invention;

[0033] Figure 7 This is a schematic diagram of the appearance of the rotating blade of the present invention;

[0034] Figure 8 This is a schematic diagram of the appearance of the center rod of the present invention;

[0035] Figure 9 is a cross-sectional schematic diagram of the lower portion of the housing of Example 2 of the present invention;

[0036] Figure 10 This is a longitudinal sectional view of the interior of the housing of Example 2 of the present invention;

[0037] Figure 11 This is a schematic diagram of the overall structure of Example 2 of the present invention;

[0038] Among them, 1-shell, 11-winding mechanism, 111-sleeve, 112-rotor, 113-winding rod, 114-second connecting line, 115-first spring, 116-groove, 117-bump, 12-first sieve plate, 13-second sieve plate, 14-aeration wheel, 15-gear, 16-gear ring, 161-ring, 162-first shift block, 163-second shift block, 17-first baffle, 171-first block, 172-first connecting line, 18-liquid inlet pipe, 19-air outlet, 2-stirring mechanism, 21-center rod, 22-rotating blade, 221-bending rod, 23-first connecting rod, 24-second connecting rod, 25-sleeve. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with specific implementation methods to better demonstrate the advantages of the present invention.

[0040] Example 1

[0041] like Figure 2 As shown, an experimental device for analyzing heterogeneous ozone treated wastewater includes a housing 1 and a stirring mechanism 2. A first sieve plate 12 is provided at the upper portion of the housing 1, and a second sieve plate 13 is slidably provided at the lower portion of the housing 1. A filter membrane is provided on the second sieve plate 13. The pore size of the filter membrane is 0.45 μm. The filter membrane is a mixed fiber microporous filter membrane.

[0042] The winding mechanism 11 includes a downwardly opening housing 111 and a rotating wheel 112. The outer top surface of the housing 111 is provided with a connecting rod for pressing the housing 111 downward. The upper end of the connecting rod passes through the top surface of the housing 1. The connecting rod is connected to the housing 1 in a sliding and sealing manner.

[0043] The first sieve plate 12 is hollow inside and is provided with a protrusion 117. The protrusion 117 is connected to the inner wall of the first sieve plate 12 via a second spring. A first connecting line 172 is provided on the protrusion 117. A first baffle 17 is provided on the bottom surface of the shell 1 located at the liquid outlet and is slidably connected to the bottom surface of the shell 1. The first baffle 17 is provided with a first stopper 171 fixedly connected thereto. The first stopper 171 is connected to the first connecting line 172. The inner surface of the ring 161 is provided with a first shifting block 162 for cooperating with the first stopper 171 to translate the first baffle 17.

[0044] The upper end surface of the first sieve plate 12 is provided with a through hole for the bottom end of the casing 111 to extend into the interior of the first sieve plate 12, and the bottom end of the outer wall of the casing 111 is provided with a groove 116 for fixedly engaging with the protrusion 117.

[0045] like Figure 3 As shown, the rotating wheel 112 is arranged in the housing 111 and is rotatably connected to the top surface of the housing 111 through a first spring 115. A threaded groove is provided on the outer wall of the rotating wheel 112, and a slider is provided on the inner wall of the housing 111 for slidingly connecting with the threaded groove to enable the housing 111 to move up and down.

[0046] A winding rod 113 is provided on the bottom surface of the rotating wheel 112, and the winding rod 113 is rotatably connected to the lower end surface of the first sieve plate 12. The second connecting line 114 passes through the first sieve plate 12 and is connected to the winding rod 113;

[0047] like Figure 2 、 4 5, the stirring mechanism 2 is arranged in the shell 1 between the first sieve plate 12 and the second sieve plate 13, and the stirring mechanism 2 includes a center rod 21 vertically arranged on the bottom surface of the shell 1 and a contraction assembly slidably connected to the center rod 21, the top end of the center rod 21 is rotatably connected to the first sieve plate 12, and the bottom end of the center rod 21 passes through the second sieve plate 13 and is rotatably connected to the bottom surface of the shell 1, and the second sieve plate 13 is slidably connected to the center rod 21;

[0048] The contraction assembly includes two sets of rotating blades 22 and two sets of vertically arranged scissor arms. Each set of the scissor arms includes a first connecting rod 23 and a second connecting rod 24. The upper and lower ends of the first connecting rod 23 and the second connecting rod 24 are respectively rotatably connected, and the two sets of connections are respectively rotatably sleeved on a set of sleeves 25. The end edges of the rotating blades 22 are provided with support rods for passing through the sleeves 25. The support rods are rotatably connected to the sleeves 25, and the end surfaces of the support rods are provided with bending rods 221.

[0049] like Figure 6 、 7 As shown in FIG. 8 , the center rod 21 is provided with a first slide groove 211 and a second slide groove 212 for sliding the bending rod 221 and driving the rotating blade 22 to rotate 90°; the sleeve 25 not connected to the rotating blade 22 is provided with a connecting block for sliding connection with the first slide groove 211;

[0050] The connecting block at the bottom end of the shrinking assembly is slidably engaged with the second sieve plate 13 through an annular groove provided on the second sieve plate 13, and a second connecting line 114 is provided on the connecting block at the bottom end of the shrinking assembly.

[0051] The first screen plate 12 is provided with a winding mechanism 11 for winding the second connecting line 114.

[0052] like Figure 2 、 9 As shown, the top surface of the shell 1 is provided with an air outlet 19, the shell 1 between the first sieve plate 12 and the second sieve plate 13 is connected to a liquid inlet pipe 18, an air inlet pipe is provided below the shell 1, and the bottom surface of the shell 1 is provided with a liquid outlet.

[0053] An aeration wheel 14 is sleeved on the central rod 21 at the bottom of the housing 1, and the aeration wheel 14 is engaged with a positioning pin provided on the central rod 21. The aeration wheel 14 passes through the bottom surface of the housing 1 through a connecting pipe and is rotatably sealed with the housing 1. The air inlet pipe is rotatably sealed with the aeration wheel 14, and the connecting pipe is driven to rotate by a motor provided outside the housing 1.

[0054] The aeration wheel 14 is hollow inside, and a plurality of air holes are provided on the upper end surface of the aeration wheel 14. The bottom surface of the housing 1 is provided with a gear 15 and a gear ring 16 that mesh with the aeration wheel 14. The gear ring 16 and the aeration wheel 14 are located at the same center, and the inner surface of the gear ring 16 is provided with teeth that mesh with the gear 15.

[0055] The gear ring 16 is rotatably connected to the bottom surface of the shell 1 through a circular ring 161; the shell 1 is made of glass; the air inlet pipe is connected to an ozone device, which includes a flow meter, an ozone concentration detector, an ozone generator and an oxygen cylinder that are sequentially connected to the air inlet pipe through pipes, and the air outlet 19 is connected to an ozone destroyer.

[0056] The method for analyzing the heterogeneous ozone treatment of wastewater using the above experimental device includes the following steps:

[0057] S1: wastewater and catalyst are added to the housing 1 through the liquid inlet pipe 18, the motor is turned on to stir the wastewater with the catalyst, and at the same time, ozone is introduced into the aeration wheel 14 through the air inlet pipe, and the wastewater with the catalyst is aerated by the aeration wheel 14;

[0058] S2: Start the reeling mechanism 11 to reel in the second connecting line 114, and the contraction assembly and the second sieve plate 13 move upward. The separated catalyst and the liquid sample are separated by the filter membrane on the second sieve plate 13, and the liquid sample discharged from the liquid outlet pipe is collected; press the connecting rod to reset the second sieve plate 13.

[0059] S3: Repeat steps S1-S2, and perform multiple sets of repeated experiments using the separated catalyst to obtain multiple sets of liquid samples;

[0060] S4: Analyze each of the liquid samples to determine the concentration of specific organic matter, TOC value, UV 254 Any one or more of the value, three-dimensional fluorescence intensity and characteristic organic matter are used to obtain data and conduct comprehensive analysis to evaluate the catalytic ozone efficiency.

[0061] The working method of the above experimental device for analyzing heterogeneous ozone treatment wastewater is as follows:

[0062] First, the motor speed is set so that the experimental time is equal to the time it takes for the gear ring 16 to rotate once. Then, wastewater and catalyst are added to the housing 1 through the liquid inlet pipe 18, and then ozone is introduced to ensure that the contraction assembly is in a vertically stretched state and the rotating blades 22 are perpendicular to the bottom surface of the housing 1.

[0063] At this time, the motor is turned on, and the motor drives the connecting pipe to rotate through the transmission belt, and the connecting pipe drives the aeration wheel 14 to rotate, and the aeration wheel 14 drives the central rod 21 to rotate, and drives the rotating blades 22 to stir the wastewater with the added catalyst;

[0064] When the gear ring 16 rotates one circle, the experiment is over, the first shift block 162 shifts the first stopper to open the first baffle 17, and the first stopper pulls the protrusion 117 to move through the first connecting line 172, so that the protrusion 117 is disconnected from the groove 116, and the housing 111 moves upward under the action of the first spring 115, driving the slider to slide along the thread groove, so that the rotating wheel 112 rotates forward, and the rotating wheel 112 drives the winding rod 113 to rotate, and the winding rod 113 reels the second connecting line 114, so that the first The second connecting line 114 is stretched upward, and the second connecting line 114 pulls the sleeve 25 and the second sieve plate 13 upward. When the second connecting line 114 pulls the sleeve 25, the contraction assembly contracts upward, and the bending tube slides along the second chute 212 and rotates until the rotating blade 22 is parallel to the bottom surface of the shell 1. The catalyst is retained on the second sieve plate 13 through the filter membrane on the second sieve plate 13, and the second sieve plate 13 and the rotating blade 22 squeeze the catalyst. The treated waste liquid is discharged and collected through the liquid outlet pipe;

[0065] Similarly, when conducting a second experiment, the connecting rod is pressed so that the groove 116 and the protrusion 117 are engaged again, the housing 111 moves downward, driving the slider to slide along the threaded groove, causing the wheel 112 to rotate in the opposite direction, the second connecting line 114 on the winding rod 113 is loosened, the second sieve plate 13 slides downward to reset, and the contraction assembly is also reset. Five sets of repeated experiments are carried out using the catalyst after separation from the above wastewater.

[0066] Example 2

[0067] This embodiment is a further optimization based on embodiment 1, and the difference therefrom is that, Figure 1 、 9 As shown in Figures 10 and 11, four groups of sampling ports 164 are provided on the outer side wall of the bottom end of the shell 1. Each group of sampling ports 164 is provided with a second baffle, which is slidably connected to the inner wall of the shell 1 located at the sampling port 164, and a second block connected thereto via a torsion spring is provided on the second baffle. A second shift block 163 is provided on the outer side of the ring 161 for cooperating with the second block to shift the second baffle so as to slide. The second baffle is connected to the inner wall of the shell 1 via a third spring.

[0068] The working principle of this embodiment is roughly the same as that of Example 1, except that: the motor speed is set according to the number of sampling times and the sampling interval time, so that at each interval of a group of sampling time, the gear ring 16 drives the second shift block 163 to rotate to the corresponding sampling port 164; during the experiment, the aeration wheel 14 drives the gear ring 16 to rotate, and the second shift block 163 sequentially shifts the second block, causing the second baffle to shift, opening four groups of sampling ports 164, and when the second shift block 163 moves outside the corresponding sampling port 164, the second block is reset under the action of the torsion spring, so that it is not moved by the second shift block 163, and the second baffle is reset under the action of the third spring, thereby collecting multiple groups of liquid samples.

[0069] Example 3

[0070] This embodiment is substantially the same as embodiment 2, except that the method for analyzing heterogeneous ozone treatment of wastewater using the experimental apparatus of embodiment 2 includes the following steps:

[0071] S1: First, the motor speed is set so that the experimental time is the same as the time it takes for the gear ring 16 to rotate once. Then, wastewater and catalyst are added to the housing 1 through the liquid inlet pipe 18, and the motor is turned on to stir the wastewater with the catalyst. At the same time, ozone is introduced into the aeration wheel 14 through the air inlet pipe, and the wastewater with the catalyst is aerated by the aeration wheel 14.

[0072] S2: During aeration, the aeration wheel 14 drives the central rod 21 to rotate, driving the rotating blades 22 to stir the wastewater with the added catalyst. During the experiment, the aeration wheel 14 drives the gear ring 16 to rotate, and the second shift block 163 sequentially shifts to open the sampling port 164 to collect multiple groups of liquid samples; the winding mechanism 11 is started to wind up the second connecting line 114, the contraction assembly and the second sieve plate 13 move upward, and the separated catalyst and liquid sample are separated by the filter membrane on the second sieve plate 13, and the liquid sample discharged from the liquid outlet pipe is collected; the connecting rod is pressed to reset the second sieve plate 13.

[0073] S3: Press the connecting rod to reset the second sieve plate 13, and perform multiple repeated experiments using the separated catalyst to obtain multiple groups of liquid samples;

[0074] S4: Analyze each of the liquid samples to determine the concentration of specific organic matter, TOC value, UV 254 The catalytic ozone efficiency was evaluated by acquiring data based on the fluorescence intensity, three-dimensional fluorescence intensity and characteristic organic matter.

Claims

1. An experimental device for analyzing heterogeneous ozone treated wastewater, characterized in that: It comprises a shell (1) and a stirring mechanism (2), A first sieve plate (12) is provided in the upper portion of the housing (1), a second sieve plate (13) is slidably provided in the lower portion of the housing (1), and a filter membrane is provided on the second sieve plate (13); The stirring mechanism (2) is arranged in the housing (1) between the first sieve plate (12) and the second sieve plate (13), and the stirring mechanism (2) comprises a center rod (21) vertically arranged on the bottom surface of the housing (1) and a contraction assembly slidably connected to the center rod (21); the top end of the center rod (21) is rotatably connected to the first sieve plate (12), and the bottom end of the center rod (21) passes through the second sieve plate (13) and is rotatably connected to the bottom surface of the housing (1); the second sieve plate (13) is slidably connected to the center rod (21); The contraction assembly includes multiple groups of rotating blades (22) and multiple groups of scissor arms arranged vertically, each group of the scissor arms includes a first connecting rod (23) and a second connecting rod (24), and the upper and lower ends of the first connecting rod (23) and the second connecting rod (24) are respectively rotatably connected, and the two groups of connections are respectively rotatably sleeved on a group of sleeves (25); a support rod for passing through the sleeve (25) is provided on the end edge of the rotating blade (22), the support rod is rotatably connected to the sleeve (25), and the end surface of the support rod is provided with a bending rod (221); The central rod (21) is provided with a first sliding groove (211) and a second sliding groove (212) for sliding the bending rod (221) and driving the rotating blade (22) to rotate 90 degrees; the sleeve (25) not connected to the rotating blade (22) is provided with a connecting block for sliding connection with the first sliding groove (211); The connecting block at the bottom end of the shrinking assembly is slidably engaged with the second screen plate (13), and a second connecting line (114) is provided on the connecting block at the bottom end of the shrinking assembly. The first screen plate (12) is provided with a winding mechanism (11) for winding the second connecting line (114). An air outlet (19) is provided on the top surface of the shell (1), a liquid inlet pipe (18) is connected to the shell (1) between the first sieve plate (12) and the second sieve plate (13), an air inlet pipe is provided below the shell (1), and a liquid outlet is provided on the bottom surface of the shell (1). An aeration wheel (14) is sleeved on a central rod (21) located at the bottom of the housing (1), and the aeration wheel (14) is engaged with a positioning pin provided on the central rod (21). The aeration wheel (14) passes through the bottom surface of the housing (1) through a connecting pipe and is connected to the housing (1) in a rotationally sealed manner. The air inlet pipe is connected to the aeration wheel (14) in a rotationally sealed manner, and the connecting pipe is driven to rotate by a motor provided outside the housing (1). The aeration wheel (14) is hollow inside, and a plurality of air holes are provided on the upper end surface of the aeration wheel (14). The bottom surface of the housing (1) is provided with a gear (15) and a gear ring (16) that mesh with the aeration wheel (14). The gear ring (16) and the aeration wheel (14) are located at the same center of a circle, and the inner surface of the gear ring (16) is provided with teeth that mesh with the gear (15). The gear ring (16) is rotatably connected to the bottom surface of the housing (1) via a circular ring (161).

2. The experimental device for analyzing heterogeneous ozone treated wastewater according to claim 1, characterized in that: The reeling mechanism (11) comprises a downwardly opening casing (111) and a rotating wheel (112); a connecting rod for pressing the casing (111) downward is provided on the outer top surface of the casing (111); the upper end of the connecting rod passes through the top surface of the shell (1); the connecting rod is slidably sealed with the shell (1) up and down. The rotating wheel (112) is arranged in the casing (111) and is rotatably connected to the inner top surface of the casing (111) via a first spring (115). A thread groove is provided on the outer side wall of the rotating wheel (112). The inner side wall of the casing (111) is provided with a slider for slidingly connecting with the thread groove to enable the casing (111) to move up and down. A winding rod (113) is provided on the bottom surface of the rotating wheel (112), and the winding rod (113) is rotatably connected to the lower end surface of the first sieve plate (12); the second connecting line (114) passes through the first sieve plate (12) and is connected to the winding rod (113); The first sieve plate (12) is hollow inside and is provided with a protrusion (117), the protrusion (117) is connected to the inner wall of the first sieve plate (12) via a second spring, and a first connecting line (172) is provided on the protrusion (117); The upper end surface of the first sieve plate (12) is provided with a through hole for the bottom end of the casing (111) to extend into the interior of the first sieve plate (12), and the bottom end of the outer wall of the casing (111) is provided with a groove (116) for fixedly engaging with the protrusion (117). The bottom surface of the shell (1) located at the liquid outlet is provided with a first baffle (17) slidably connected to the bottom surface of the shell (1); the first baffle (17) is provided with a first stopper (171) fixedly connected thereto; the first stopper (171) is connected to the first connecting line (172); and the inner surface of the circular ring (161) is provided with a first shifting block (162) for cooperating with the first stopper (171) to enable the first baffle (17) to move horizontally.

3. The experimental device for analyzing heterogeneous ozone treated wastewater according to claim 1, characterized in that: The outer wall of the bottom end of the shell (1) is provided with a plurality of groups of sampling ports (164), each group of the sampling ports (164) is provided with a second baffle, the second baffle is slidably connected to the inner wall of the shell (1) located at the sampling port (164), and the second baffle is provided with a second block connected thereto via a torsion spring, and the outer side surface of the ring (161) is provided with a second shifting block (163) for cooperating with the second block to shift the second baffle so as to slide; the second baffle is connected to the inner wall of the shell (1) via a third spring.

4. The experimental device for analyzing heterogeneous ozone treated wastewater according to claim 1, characterized in that: The pore size of the filter membrane is 0.45 μm.

5. The experimental device for analyzing heterogeneous ozone treated wastewater according to claim 1, characterized in that: The connecting pipe is connected to the output shaft of the motor through a transmission belt.

6. The experimental device for analyzing heterogeneous ozone treated wastewater according to claim 1, characterized in that: The housing (1) is made of glass material.

7. The experimental device for analyzing heterogeneous ozone treated wastewater according to claim 1, characterized in that: The air inlet pipe is connected to an ozone device, which includes a flow meter, an ozone concentration detector, an ozone generator and an oxygen cylinder which are sequentially connected to the air inlet pipe through a pipeline, and the air outlet (19) is connected to an ozone destroyer.

8. A method for analyzing heterogeneous ozone treatment of wastewater using the experimental device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: wastewater and catalyst are added to the housing (1) through the liquid inlet pipe (18), the motor is turned on, and the wastewater with the catalyst is stirred. At the same time, ozone is introduced into the aeration wheel (14) through the air inlet pipe, and the wastewater with the catalyst is aerated by the aeration wheel (14); S2: Start the reeling mechanism (11) to reel the second connecting line (114), the contraction assembly and the second sieve plate (13) move upward, the separated catalyst and the liquid sample are separated by the filter membrane on the second sieve plate (13), and the liquid sample discharged from the liquid outlet pipe is collected; press the connecting rod to reset the second sieve plate (13). S3: Repeat steps S1-S2, and perform multiple sets of repeated experiments using the separated catalyst to obtain multiple sets of liquid samples; S4: Analyze each of the liquid samples to determine the concentration of specific organic matter, TOC value, UV 254 Any one or more of the value, three-dimensional fluorescence intensity and characteristic organic matter are used to obtain data and conduct comprehensive analysis to evaluate the catalytic ozone efficiency.

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