Multi-channel catalytic ozonation catalyst activity evaluation device

Abstract

The invention relates to the technical field of experimental equipment, in particular to a multi-channel catalytic ozonation catalyst activity evaluation device which comprises an ozone generator, a gas buffer distributor, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe and a gas outlet pipe, the plurality of catalyst reaction groups are respectively communicated with the plurality of gas transmission ports; the water tank supplies water to the plurality of catalyst reaction groups through the plurality of water inlet pumps, so that the whole device can be used for evaluating the activity of a plurality of catalysts at the same time, and the evaluation efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of experimental equipment, and in particular to a multi-channel ozone catalytic oxidation catalyst activity evaluation device. Background Art

[0002] With the acceleration of industrialization and urbanization, water pollution has become increasingly serious. Various types of water pollution have caused serious harm to human health and ecological balance. Among the many water treatment processes, ozone oxidation technology is one of the most widely used and successful advanced oxidation (AOPs) technologies. Adding a certain amount of heterogeneous catalyst to the ozone oxidation system is called heterogeneous catalytic ozone oxidation technology, which is conducive to improving the degradation effect of organic pollutants. The catalyst promotes the decomposition of ozone on its surface to produce ·OH, and also promotes the adsorption and oxidation reaction of organic matter and ozone on the catalyst surface, thereby increasing the degradation of organic matter. Heterogeneous catalytic ozone oxidation technology has the advantages of high oxidation efficiency, easy catalyst separation, simple process, and low water treatment cost. As a green treatment process, it has the advantages of easy operation, high pollutant removal efficiency, and no secondary pollution. It has been widely used in the fields of wastewater deep treatment and new pollutant control, and has broad application prospects. Therefore, how to evaluate the catalytic activity of the catalyst is of great significance.

[0003] At present, the research on heterogeneous ozone catalysts prepared by rational combination of different components to promote the oxidation of organic matter has been very in-depth. Common heterogeneous ozone catalysts include metal oxides (such as MnO2, FeOOH, TiO2, etc.), multi-metal supported catalysts (such as RuO2 / Al2O3, MnO2 / Al2O3, TiO2 / Al2O3, etc.), minerals (such as Cu / cordierite, Mn / honeycomb ceramics, etc.), carbon-based materials (activated carbon, graphene), etc.

[0004] The most widely used catalyst in engineering projects is a carrier-loaded multi-metal oxide, which is often loaded in a fixed bed reactor for ozone catalytic reaction. Due to the complexity of heterogeneous catalytic ozone oxidation process, different catalysts, different reactants, and reaction mechanisms are often different. In view of the complexity of ozone catalytic oxidation reaction, it is difficult to accurately evaluate the performance of the catalyst by only using a certain ozone catalytic oxidation catalyst for activity evaluation. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a multi-channel ozone catalytic oxidation catalyst activity evaluation device, which adopts the following technical solutions: A multi-channel ozone catalytic oxidation catalyst activity evaluation device, comprising: An ozone generator, using an air source to supply air to the ozone generator; A gas buffer distributor, connected to the ozone generator, and the gas buffer distributor is provided with a plurality of gas delivery ports; a catalyst reaction group, wherein the catalyst reaction groups are provided in plurality and are respectively connected to the plurality of gas delivery ports; and A water tank supplies water to multiple catalyst reaction groups through multiple water inlet pumps.

[0006] A further technical solution is that the catalyst reaction group includes at least one reaction tank body, the reaction tank body includes an upper shell and a lower shell that are connected to each other, a stirring device is provided in the lower shell, the stirring device has a built-in catalyst, and an exhaust gas outlet and a reaction water sampling port are provided on the lower shell.

[0007] A further technical solution is that the stirring device includes a stirring shaft vertically arranged in the lower shell body, a stirring disk is provided at the bottom of the stirring shaft, a plurality of stirring plates are provided on the stirring shaft, a cavity is provided inside the stirring plate, a plurality of through holes connected to the cavity are provided on the stirring plate, a catalyst is provided in the cavity, a particle diameter of the catalyst is larger than a diameter of the through hole, a rotating motor is provided at the top of the lower shell body, and an output end of the rotating motor passes through the top of the lower shell body and is connected to the stirring shaft.

[0008] A further technical solution is that the bottom of the upper shell is hollow and used to accommodate the rotating motor, the lower end of the upper shell and the upper end of the lower shell are respectively provided with a first extension and a second extension, the first extension and the second extension are respectively provided with a first notch and a second notch which are arranged correspondingly, a plurality of articulated frames are provided in the circumference of the lower shell, a connecting rod is rotatably provided on the articulated frame, and the end of the connecting rod away from the articulated frame passes through the second notch and the first notch in sequence and is threadedly connected with a tightening nut.

[0009] A further technical solution is that the stirring disk is arranged in a circular shape, and a plurality of opening slits distributed in a circular array are provided along the circumference of the stirring disk, the stirring disk between two adjacent opening slits is bent to form a stirring protrusion, and the adjacent stirring protrusions are arranged alternately in sequence up and down.

[0010] A further technical solution is that two ultraviolet lamps with different heights are arranged on both sides of the lower shell.

[0011] A further technical solution is that flanges are provided at the upper end of the upper shell and the lower end of the lower shell, and a transparent mounting groove is provided in the middle of the flange, and the size of the mounting groove is adapted to the size of the upper shell and the lower shell.

[0012] A further technical solution is that a flow meter is provided on the gas transmission port.

[0013] A further technical solution is that the gas source is oxygen.

[0014] A further technical solution is that the catalyst reaction groups are provided with 3-6 groups.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The use of oxygen cylinders to supply gas to the ozone generation system can ensure stable airflow and adjustable oxygen content. The generated ozone enters the gas buffer distributor, and the gas is transported to the catalyst reaction group through the gas transmission port by the diversion method to ensure constant gas supply pressure and stable flow. After being measured by the flow meter, the ozone enters the bottom of the catalyst reaction group for aeration. The wastewater and ozonated gas in the catalyst reaction group contact and react with the solid catalyst in the fixed bed. The reaction water is discharged from the reaction water sampling port at the top of the catalyst reaction group, and the reaction tail gas is discharged from the tail gas outlet at the top of the catalyst reaction group; the whole set of evaluation equipment can be designed with 3-6 groups or more, and multiple catalyst activity evaluations can be carried out at the same time, greatly improving the evaluation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a multi-channel ozone catalytic oxidation catalyst activity evaluation device of the present invention.

[0017] Figure 2 It is a schematic diagram of the connection between the upper shell and the lower shell in the present invention.

[0018] Figure 3 It is a schematic diagram of the connection between the lower housing and the rotating motor in the present invention.

[0019] Figure 4 It is a schematic diagram of the connection between the rotating motor and the stirring shaft in the present invention.

[0020] Figure 5 for Figure 4 A partial enlarged schematic diagram in the middle.

[0021] Figure 6 It is a schematic structural diagram of the stirring plate of the present invention. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Example: Figure 1-6FIG. 1 shows a preferred embodiment of a multi-channel ozone catalytic oxidation catalyst activity evaluation device of the present invention. In this embodiment, a multi-channel ozone catalytic oxidation catalyst activity evaluation device specifically includes an ozone generator 1, an air source is used to supply air to the ozone generator 1, A gas buffer distributor 2 is connected to the ozone generator 1, and the gas buffer distributor 2 is provided with a plurality of gas delivery ports 3; a catalyst reaction group, wherein the catalyst reaction groups are provided in plurality and are respectively connected to the plurality of gas delivery ports 3; and The water tank 4 supplies water to the multiple catalyst reaction groups through multiple water inlet pumps 5.

[0024] The gas delivery port 3 is provided with a flow meter 10 .

[0025] The gas source is oxygen, and the catalyst reaction groups are provided with 3 to 6 groups.

[0026] In the present invention, an oxygen cylinder is used to supply gas to the ozone generation system, which can ensure stable airflow and adjustable oxygen content. The generated ozone enters the gas buffer distributor 2, and the gas is delivered to the catalyst reaction group through the gas delivery port 3 by adopting a split flow method to ensure constant gas supply pressure and stable flow. After being measured by a flow meter 10, the ozone enters the bottom of the catalyst reaction group for aeration. The wastewater and ozonated gas in the catalyst reaction group contact and react with the solid catalyst 7 in the fixed bed. The reaction water is discharged from the reaction water sampling port 9 at the top of the catalyst reaction group, and the reaction tail gas is discharged from the tail gas outlet 8 at the top of the catalyst reaction group; the whole set of evaluation devices can be designed with 3-6 groups or more, and multiple catalyst 7 activity evaluations can be carried out simultaneously, greatly improving the evaluation efficiency.

[0027] The catalyst 7 reaction group includes at least one reaction tank body 25, and the reaction tank body 25 includes an upper shell 11 and a lower shell 12 that are connected to each other. A stirring device is provided in the lower shell 12, and the stirring device has a built-in catalyst 7. The lower shell 12 is provided with an exhaust gas outlet 8 and a reaction water sampling port 9.

[0028] refer to Figure 1 As shown, multiple catalyst 7 reaction groups include at least one reaction tank body 25. The reaction tank body 25 is set according to experimental requirements. For example, when multiple reaction tank bodies 25 are needed for comparative experiments, multiple gas buffer distributors can be connected through a gas buffer distributor, and the reaction tank bodies 25 can be overlapped up and down, so as to test the influence of height on experimental data. Specifically, when multiple reaction tank bodies 25 are set up up and down, they are connected through a flange 24, and gas supply experiments are carried out on the multiple reaction tank bodies 25 through a gas buffer distributor.

[0029] The stirring device includes a stirring shaft 13 vertically arranged in the lower shell 12, a stirring disk 14 is provided at the bottom of the stirring shaft 13, a plurality of stirring plates 15 are provided on the stirring shaft 13, a cavity is provided inside the stirring plate 15, a plurality of through holes 16 connected to the cavity are provided on the stirring plate 15, a catalyst 7 is provided in the cavity, and the particle diameter of the catalyst 7 is larger than the diameter of the through hole 16, a rotating motor 17 is provided at the top of the lower shell 12, and the output end of the rotating motor 17 passes through the top of the lower shell 12 and is connected to the stirring shaft 13.

[0030] The bottom of the upper shell 11 is hollow and is used to accommodate the rotating motor 17. The lower end of the upper shell 11 and the upper end of the lower shell 12 are respectively provided with a first extension and a second extension, and the first extension and the second extension are respectively provided with a first notch and a second notch that are correspondingly arranged. A plurality of articulated frames 18 are provided in the circumference of the lower shell 12, and a connecting rod 19 is rotatably provided on the articulated frame 18. The end of the connecting rod 19 away from the articulated frame 18 passes through the second notch and the first notch in sequence and is threadedly connected with a tightening nut 20.

[0031] In order to accelerate the reaction of the liquid, the stirring shaft 13 is driven to rotate by the rotating motor 17. During the rotation, the stirring shaft 13 drives the stirring plate 15 to rotate, and then the catalyst 7 arranged in the cavity of the stirring plate 15 rotates with the stirring plate 15, thereby increasing the probability of the catalyst 7 contacting the liquid, improving the catalytic efficiency of the catalyst 7, shortening the time required for the reaction, and facilitating the rapid acquisition of experimental data.

[0032] At the same time, the rotating motor 17 is arranged on the top of the lower shell 12 to prevent the rotating motor 17 from being affected by the liquid in the lower shell 12 .

[0033] The rotary motors 17 in the upper and lower reaction tanks 25 are motors of the same type and are equipped with encoders so that the rotary motors 17 can be synchronously controlled.

[0034] The stirring disk 14 is arranged in a circular shape, and a plurality of opening slits 21 distributed in a circular array are arranged along the circumference of the stirring disk 14. The stirring disk 14 between two adjacent opening slits 21 is bent to form a stirring protrusion 22. The adjacent stirring protrusions 22 are arranged alternately in sequence up and down. The cross-arranged stirring protrusions 22 facilitate disturbance of the liquid at the bottom, accelerate liquid mixing, and avoid sedimentation of substances at the bottom.

[0035] Two ultraviolet lamps 23 are arranged at different heights on both sides of the lower shell 12. The effect of the ultraviolet lamps 23 on the catalyst 7 is mainly reflected in the photocatalytic process. The ultraviolet light can excite the electrons on the surface of the catalyst 7, causing them to transition, thereby generating active oxygen species with strong oxidizing properties, such as hydroxyl radicals and superoxide anions, etc. These active oxygen species can efficiently catalyze and decompose organic pollutants, converting them into harmless carbon dioxide and water.

[0036] The upper end of the upper shell 11 and the lower end of the lower shell 12 are both provided with a flange 24, and the middle of the flange 24 is provided with a transparent mounting groove, and the size of the mounting groove is adapted to the size of the upper shell 11 and the lower shell 12. The upper end of the upper shell 11 is placed in the mounting groove of one flange 24, and the lower end of the lower shell 12 is placed in the mounting groove of another flange 24. When multiple reaction tank bodies 25 need to be arranged up and down, it is only necessary to connect two adjacent flanges 24 by bolts.

[0037] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A multi-channel ozone catalytic oxidation catalyst activity evaluation device, characterized in that: include: An ozone generator, which uses an air source to supply gas to the ozone generator; a gas buffer distributor, which is connected to the ozone generator and has multiple gas supply ports; a catalyst reaction group, which is provided with multiple catalyst reaction groups and is respectively connected to the multiple gas supply ports; and a water tank, which supplies water to the multiple catalyst reaction groups through multiple water inlet pumps.

2. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 1, characterized in that: The catalyst reaction group includes at least one reaction tank body, which includes an upper shell and a lower shell that are connected to each other. A stirring device is provided in the lower shell, and a catalyst is built in the stirring device. An exhaust gas outlet and a reaction water sampling port are provided on the lower shell.

3. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 2, characterized in that: The stirring device includes a stirring shaft vertically arranged in the lower shell body, a stirring disk is provided at the bottom of the stirring shaft, a plurality of stirring plates are provided on the stirring shaft, a cavity is provided inside the stirring plate, a plurality of through holes connected to the cavity are provided on the stirring plate, a catalyst is provided in the cavity, and a particle diameter of the catalyst is larger than a diameter of the through hole, a rotating motor is provided on the top of the lower shell body, and an output end of the rotating motor passes through the top of the lower shell body and is connected to the stirring shaft.

4. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 3, characterized in that: The bottom of the upper shell is hollow and is used to accommodate the rotating motor. The lower end of the upper shell and the upper end of the lower shell are respectively provided with a first extension and a second extension, and the first extension and the second extension are respectively provided with a first notch and a second notch that are correspondingly arranged. A plurality of articulated frames are provided in the circumference of the lower shell, and a connecting rod is rotatably provided on the articulated frame. The end of the connecting rod away from the articulated frame passes through the second notch and the first notch in sequence and is threadedly connected with a tightening nut.

5. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 3, characterized in that: The stirring disc is arranged in a circular shape, and a plurality of opening slots distributed in a circular array are arranged along the circumference of the stirring disc. The stirring disc between two adjacent opening slots is bent to form stirring convex blocks, and the adjacent stirring convex blocks are arranged alternately in sequence up and down.

6. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 3, characterized in that: Two ultraviolet lamps with different heights are arranged on both sides of the lower shell.

7. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 3, characterized in that: The upper end of the upper shell and the lower end of the lower shell are both provided with flanges, and the middle of the flanges are both provided with transparent mounting grooves, and the size of the mounting grooves is adapted to the size of the upper shell and the lower shell.

8. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 1, characterized in that: A flow meter is provided on the gas delivery port.

9. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 1, characterized in that: The gas source is oxygen.

10. A multi-channel ozone catalytic oxidation catalyst activity evaluation device according to claim 1, characterized in that: The catalyst reaction groups are provided with 3 to 6 groups.

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