阅读说明：本技术 一种硼掺杂金刚石电极污水处理实验装置及其操作方法 (Boron-doped diamond electrode sewage treatment experimental device and operation method thereof ) 是由 刘鲁生 姜辛 黄楠 于 2020-04-17 设计创作，主要内容包括：本发明涉及金刚石薄膜应用领域,尤其涉及一种硼掺杂金刚石电极污水处理实验装置及其操作方法。按污水流向从储液罐到反应器壳体之间相通的管路上,依次连接有输液管路一、球阀一、球阀二、输液管路二、水泵、输液管路三、球阀三、输液管路四、流量计、输液管路五,输液管路一与储液罐的侧面下部连通,输液管路五与反应器壳体的侧面下部连通,反应器壳体的侧面上部通过回液管路连通到储液罐的侧面上部；在反应器壳体内,固定硼掺杂金刚石电极与移动硼掺杂金刚石电极保持平行位置于反应器壳体内的污水通道两侧。本发明可精确取得不同参数的重要实验数据,对比可以找出最佳污水处理运行方案,以优化污水厂生产运行,提高效率,节约成本。(The invention relates to the field of diamond film application, in particular to a boron-doped diamond electrode sewage treatment experimental device and an operation method thereof. According to sewage flow direction, a first infusion pipeline, a first ball valve, a second infusion pipeline, a water pump, a third infusion pipeline, a third ball valve, a fourth infusion pipeline, a flowmeter and a fifth infusion pipeline are sequentially connected to a pipeline communicated from a liquid storage tank to a reactor shell, the first infusion pipeline is communicated with the lower part of the side face of the liquid storage tank, the fifth infusion pipeline is communicated with the lower part of the side face of the reactor shell, and the upper part of the side face of the reactor shell is communicated with the upper part of the side face of the liquid storage tank through a liquid return pipeline; in the reactor shell, the fixed boron-doped diamond electrode and the movable boron-doped diamond electrode are kept in parallel at two sides of a sewage channel in the reactor shell. The invention can accurately obtain important experimental data of different parameters, and can find out the optimal sewage treatment operation scheme by comparison so as to optimize the production operation of a sewage plant, improve the efficiency and save the cost.)

1. A boron-doped diamond electrode sewage treatment experimental device is characterized in that a first infusion pipeline, a first ball valve, a second infusion pipeline, a water pump, a third infusion pipeline, a third ball valve, a fourth infusion pipeline, a flowmeter and a fifth infusion pipeline are sequentially connected to a pipeline communicated from a liquid storage tank to a reactor shell according to sewage flow direction, the first infusion pipeline is communicated with the lower portion of the side face of the liquid storage tank, the fifth infusion pipeline is communicated with the lower portion of the side face of the reactor shell, and the upper portion of the side face of the reactor shell is communicated with the upper portion of the side face of the liquid storage tank through a liquid return pipeline;

in the reactor shell, the positive wiring electrode and the fixed boron-doped diamond electrode are bonded together by using conductive glue, the negative wiring electrode and the mobile boron-doped diamond electrode are bonded together by using conductive glue, and the fixed boron-doped diamond electrode and the mobile boron-doped diamond electrode are kept in parallel at two sides of a sewage channel in the reactor shell.

2. The experimental device for sewage treatment with boron doped diamond electrode as claimed in claim 1, wherein the upper part of the liquid storage tank is sequentially connected with an induced draft fan and an exhaust pipeline, the inner cavity of the liquid storage tank is provided with a cooling pipeline and a temperature measuring sensor, the outside of the liquid storage tank is provided with a water chiller connected with the cooling pipeline, the temperature measuring sensor is connected with the signal input end of the direct current power supply and the signal input end of the electric control cabinet through a line, the output ends of the direct current power supply and the electric control cabinet are connected with the water chiller through a line, and the on-off.

3. The experimental device for sewage treatment with boron doped diamond electrode as claimed in claim 2, wherein the output ends of the direct current power supply and the electric control cabinet are connected with the water pump through a circuit by a frequency converter.

4. The experimental device for boron-doped diamond electrode sewage treatment as claimed in claim 1, wherein a fixed boron-doped diamond electrode and a rubber back plate are sequentially arranged on the left side inside the reactor shell, the rubber back plate is positioned outside the fixed boron-doped diamond electrode, and the positive wiring electrode is led out of the reactor shell from the fixed boron-doped diamond electrode; the right side of the inner part of the reactor shell is provided with a mobile boron-doped diamond electrode, a negative wiring electrode is led out of the reactor shell from the mobile boron-doped diamond electrode, and one end of the mobile boron-doped diamond electrode and one end of the negative wiring electrode are sealed in a sealing rubber ring.

5. The experimental device for sewage treatment of the boron-doped diamond electrode according to claim 4, wherein the middle upper part of the movable boron-doped diamond electrode is fixedly connected with the second guide shaft, the middle lower part of the movable boron-doped diamond electrode is fixedly connected with the first guide shaft, the side surface of the second guide shaft, which is positioned outside the reactor shell, is sequentially provided with the second linear bearing and the second rubber shaft seal, the end part of the second guide shaft, which is positioned outside the reactor shell, is provided with a connecting piece, one end of the connecting piece is connected with the spiral lifter through threads, and the spiral lifter sequentially drives the connecting piece, the second guide shaft and the movable boron-doped diamond electrode; the side surface of the part, positioned outside the reactor shell, of the guide shaft is sequentially provided with a linear bearing I and a rubber shaft seal I, the end surface of the part, positioned outside the reactor shell, of the guide shaft is provided with a pointer vertical to the guide shaft I, the pointer corresponds to a scale horizontally arranged outside the reactor shell, and the moving distance of the moving boron-doped diamond electrode is determined by the moving distance of the pointer along the scale.

6. The experimental facility for boron-doped diamond electrode wastewater treatment as claimed in claim 5, wherein the first guide shaft and the second guide shaft are vertically fixed on the moving boron-doped diamond electrode, respectively, and the first guide shaft and the second guide shaft are kept in parallel.

7. The experimental apparatus for boron-doped diamond electrode wastewater treatment as claimed in claim 5, wherein the reactor shell is cylindrical in shape, horizontally disposed, and has a horizontal central axis; the rubber back plate and the fixed boron-doped diamond electrode are of a circular sheet structure, one side of the rubber back plate is bonded to the inner wall of the left side of the reactor shell, a silicon wafer on one side of the fixed boron-doped diamond electrode is bonded to the other side of the rubber back plate, and a boron-doped diamond film on the other side of the fixed boron-doped diamond electrode is in contact with sewage in the reactor shell; the silicon wafer on one side of the moving boron-doped diamond electrode is connected with the first guide shaft and the second guide shaft, and the boron-doped diamond film on the other side of the moving boron-doped diamond electrode is in contact with sewage in the reactor shell; the boron-doped diamond film for fixing the boron-doped diamond electrode and the boron-doped diamond film for moving the boron-doped diamond electrode are oppositely arranged in the inner cavity of the reactor shell; the sealing rubber ring is of a cylindrical structure and is horizontally arranged, the central axis of the sealing rubber ring is horizontal, the sealing rubber ring is bonded on the inner wall of the right side of the reactor shell and wraps the whole mobile boron-doped diamond electrode, the mobile boron-doped diamond electrode is of a circular sheet structure, and the mobile boron-doped diamond electrode is in sliding fit with the sealing rubber ring.

8. The experimental device for boron-doped diamond electrode sewage treatment as claimed in claim 1, wherein the exhaust pipeline, the liquid storage tank, the first infusion pipeline, the first ball valve, the second infusion pipeline, the third ball valve, the fourth infusion pipeline, the flow meter, the fifth infusion pipeline, the reactor shell and the liquid return pipeline are all made of UPVC material, and the outer surface of the cooling pipeline and the inner cavity of the water pump are sprayed with Teflon anticorrosive coatings.

9. The operation method of the experimental device for the sewage treatment with the boron-doped diamond electrode as set forth in one of claims 1 to 8, characterized by comprising the steps of:

step one, opening a ball valve II, connecting experimental sewage with an open end pipeline of the ball valve II, closing the ball valve I, opening a ball valve III, and opening a water pump to fill the sewage into a reactor shell;

secondly, after the sewage is filled, closing the second ball valve, opening the first ball valve, and opening the water cooler and the induced draft fan to enable the sewage to circularly flow in the experimental device;

thirdly, starting a direct-current power supply and an electric control cabinet, setting current and voltage, adjusting sewage flow by adjusting the revolution of a motor of a water pump, obtaining flow values under different parameters through a flowmeter, adjusting the distance between a fixed boron-doped diamond electrode and a movable boron-doped diamond electrode by adjusting a spiral lifter, obtaining different distance parameters through a pointer and a scale, and opening a ball valve II according to interval time in the process; sampling the sewage, detecting various indexes of the sewage until the indexes are qualified, and then shutting down the machine.

Technical Field

The invention relates to the field of diamond film application, in particular to a boron-doped diamond electrode sewage treatment experimental device and an operation method thereof.

Background

With the rapid development of petrochemical, pharmaceutical, pesticide and fuel industries, the amount and variety of organic compounds difficult to degrade in industrial wastewater are increasing day by day. In particular, it contains high concentrations of aromatic compounds such as: phenols, belonging to 'three-cause' substances, have high toxicity and are difficult to directly remove by a common biodegradation method. In the modern society, "energy conservation and emission reduction" has become the subject of the times, and wastewater treatment is one of important measures. Biochemical methods are difficult to remove organic pollutants and therefore require assistance in electrochemical catalysis, while electrodes are the core of electrocatalytic processes and determine electrocatalytic capacity, current efficiency and device lifetime. Some electrode materials used at present have many disadvantages, such as: the graphite electrode has poor catalytic oxidation capacity on organic matters and low current efficiency; noble metal materials (such as Pt, Au, etc.) are expensive and are easily poisoned by sulfur-containing organic substances, etc. to lose their electrocatalytic properties, resulting in a decrease in oxidation current efficiency, and thus are difficult to be applied in practical work.

Diamond is a material with unique physical and chemical properties, is not easy to react with acid, alkali and salt, and has good chemical stability. In recent years, researchers apply the method to the field of electrochemical degradation of organic sewage and the like, and find that the diamond electrode is excellent in electrochemical property, has a wide potential window and extremely low background current. The boron doping can change diamond into a semiconductor or a conductor with metal property, thereby laying a foundation for the application of the diamond in the field of electrodes. Compared with the traditional electrode, the boron-doped diamond electrode (BDD) has the advantages of wide window, small background current, good electrochemical stability, good mechanical property, strong corrosion resistance, good conductivity and the like, and has good prospect in the field of treating sewage by electrochemical oxidation.

Boron-doped diamond electrode (BDD) electrodes electrolyze water to generate hydroxyl radicals which are used as strong oxidants and can rapidly oxidize organic matters in water, and scholars at home and abroad widely study electrochemical oxidation processes of different organic pollutants difficult to degrade on the BDD electrodes, for example: phenols, chlorophenols, dyes, anilines, naphthols, phthalates, carboxylic acids, pesticides, surfactants, herbicides, endocrine disruptors, pyridine, polyacrylates, and the like. Therefore, the electrode can be applied to the treatment of wastewater containing refractory organic matters. Aiming at the good application prospect of the BDD electrode in the field of organic wastewater, the research and design of an industrial sewage treatment device matched with the BDD electrode are necessary. The experimental device can accurately obtain important experimental data of different parameters, and can find out the optimal sewage treatment operation scheme by comparison so as to optimize the production operation of a sewage plant.

Disclosure of Invention

The invention aims to provide a boron-doped diamond electrode sewage treatment experimental device and an operation method thereof.

The technical scheme of the invention is as follows:

a boron-doped diamond electrode sewage treatment experimental device is characterized in that a first infusion pipeline, a first ball valve, a second infusion pipeline, a water pump, a third infusion pipeline, a third ball valve, a fourth infusion pipeline, a flow meter and a fifth infusion pipeline are sequentially connected to a pipeline communicated from a liquid storage tank to a reactor shell according to sewage flow direction, the first infusion pipeline is communicated with the lower portion of the side face of the liquid storage tank, the fifth infusion pipeline is communicated with the lower portion of the side face of the reactor shell, and the upper portion of the side face of the reactor shell is communicated with the upper portion of the side face of the liquid storage tank through a;

in the reactor shell, the positive wiring electrode and the fixed boron-doped diamond electrode are bonded together by using conductive glue, the negative wiring electrode and the mobile boron-doped diamond electrode are bonded together by using conductive glue, and the fixed boron-doped diamond electrode and the mobile boron-doped diamond electrode are kept in parallel at two sides of a sewage channel in the reactor shell.

Boron doping diamond electrode sewage treatment experimental apparatus, draught fan and exhaust pipe are connected gradually on liquid storage pot upper portion, the liquid storage pot inner chamber is equipped with cooling pipeline and temperature sensor, the liquid storage pot outside is equipped with the cold water machine and is connected with cooling pipeline, temperature sensor passes through the signal input part of line connection DC power supply and automatically controlled cabinet, the output of DC power supply and automatically controlled cabinet passes through the line connection cold water machine, opens and close according to the signal control cold water machine of temperature sensor input.

The boron-doped diamond electrode sewage treatment experimental device is characterized in that the output ends of the direct-current power supply and the electric control cabinet are connected with the water pump through a circuit through a frequency converter.

According to the experimental device for treating the sewage by using the boron-doped diamond electrode, a fixed boron-doped diamond electrode and a rubber back plate are sequentially arranged on the left side in a reactor shell, the rubber back plate is positioned on the outer side of the fixed boron-doped diamond electrode, and a positive wiring electrode is led out of the reactor shell from the fixed boron-doped diamond electrode; the right side of the inner part of the reactor shell is provided with a mobile boron-doped diamond electrode, a negative wiring electrode is led out of the reactor shell from the mobile boron-doped diamond electrode, and one end of the mobile boron-doped diamond electrode and one end of the negative wiring electrode are sealed in a sealing rubber ring.

According to the experimental device for treating the sewage by the boron-doped diamond electrode, the middle upper part of the movable boron-doped diamond electrode is fixedly connected with the second guide shaft, the middle lower part of the movable boron-doped diamond electrode is fixedly connected with the first guide shaft, the side surface of the part, located outside the reactor shell, of the second guide shaft is sequentially provided with the second linear bearing and the second rubber shaft seal, the end, located outside the reactor shell, of the second guide shaft is provided with the connecting sheet, one end of the connecting sheet is connected with the spiral lifter through threads, and the spiral lifter sequentially drives the connecting sheet, the second guide shaft and the movable boron-doped diamond electrode; the side surface of the part, positioned outside the reactor shell, of the guide shaft is sequentially provided with a linear bearing I and a rubber shaft seal I, the end surface of the part, positioned outside the reactor shell, of the guide shaft is provided with a pointer vertical to the guide shaft I, the pointer corresponds to a scale horizontally arranged outside the reactor shell, and the moving distance of the moving boron-doped diamond electrode is determined by the moving distance of the pointer along the scale.

According to the experimental device for treating the sewage by the boron-doped diamond electrode, the first guide shaft and the second guide shaft are respectively and vertically fixed on the movable boron-doped diamond electrode, and the first guide shaft and the second guide shaft keep parallel.

The boron-doped diamond electrode sewage treatment experimental device is characterized in that the reactor shell is cylindrical in shape and is horizontally arranged, and the central axis of the reactor shell is a horizontal line; the rubber back plate and the fixed boron-doped diamond electrode are of a circular sheet structure, one side of the rubber back plate is bonded to the inner wall of the left side of the reactor shell, a silicon wafer on one side of the fixed boron-doped diamond electrode is bonded to the other side of the rubber back plate, and a boron-doped diamond film on the other side of the fixed boron-doped diamond electrode is in contact with sewage in the reactor shell; the silicon wafer on one side of the moving boron-doped diamond electrode is connected with the first guide shaft and the second guide shaft, and the boron-doped diamond film on the other side of the moving boron-doped diamond electrode is in contact with sewage in the reactor shell; the boron-doped diamond film for fixing the boron-doped diamond electrode and the boron-doped diamond film for moving the boron-doped diamond electrode are oppositely arranged in the inner cavity of the reactor shell; the sealing rubber ring is of a cylindrical structure and is horizontally arranged, the central axis of the sealing rubber ring is horizontal, the sealing rubber ring is bonded on the inner wall of the right side of the reactor shell and wraps the whole mobile boron-doped diamond electrode, the mobile boron-doped diamond electrode is of a circular sheet structure, and the mobile boron-doped diamond electrode is in sliding fit with the sealing rubber ring.

Boron doping diamond electrode sewage treatment experimental apparatus, exhaust pipe, liquid storage pot, infusion pipeline one, ball valve two, infusion pipeline three, ball valve three, infusion pipeline four, flowmeter, infusion pipeline five, reactor casing, return liquid pipeline are the UPVC material, cooling line surface and water pump inner chamber spraying special fluorine dragon anticorrosive coating.

The operation method of the boron-doped diamond electrode sewage treatment experimental device comprises the following steps:

step one, opening a ball valve II, connecting experimental sewage with an open end pipeline of the ball valve II, closing the ball valve I, opening a ball valve III, and opening a water pump to fill the sewage into a reactor shell;

secondly, after the sewage is filled, closing the second ball valve, opening the first ball valve, and opening the water cooler and the induced draft fan to enable the sewage to circularly flow in the experimental device;

thirdly, starting a direct-current power supply and an electric control cabinet, setting current and voltage, adjusting sewage flow by adjusting the revolution of a motor of a water pump, obtaining flow values under different parameters through a flowmeter, adjusting the distance between a fixed boron-doped diamond electrode and a movable boron-doped diamond electrode by adjusting a spiral lifter, obtaining different distance parameters through a pointer and a scale, and opening a ball valve II according to interval time in the process; sampling the sewage, detecting various indexes of the sewage until the indexes are qualified, and then shutting down the machine.

Compared with the prior art, the invention has the following advantages and beneficial effects:

1. the distance between the two BDD electrode plates designed by the invention is adjustable, and the BDD electrode plates are provided with scales to display the accurate distance. Therefore, the optimal parameter value of the distance between the fixed boron-doped diamond electrode and the movable boron-doped diamond electrode can be effectively ensured when organic sewage with different components and different concentrations is the optimal experimental scheme in the process.

2. The distance between the two BBD electrode plates is provided with the sewage channel, so that the flowing sewage flow of each point on the surfaces of the electrode plates is ensured to be the same, and the repeatability of experiments in the process of searching other experimental parameter values in the sewage treatment experiment process is ensured.

3. The control system is provided with a frequency converter for controlling the rotating speed of a water pump motor so as to control the flow velocity of the sewage, and is provided with a liquid flowmeter for displaying the flow velocity of the sewage in real time. Therefore, the optimal parameter value of the water flow speed of the sewage between the fixed boron-doped diamond electrode and the movable boron-doped diamond electrode can be effectively ensured when the optimal experimental scheme of organic sewage with different components and different concentrations can be found out in the process.

4. The liquid storage tank is provided with a heat exchange pipeline (cooling pipeline), refrigerating fluid in the pipeline is connected with a refrigerating machine line to cool the liquid in the liquid storage tank, and an exhaust pipeline is arranged above the liquid storage tank to discharge generated waste gas in time. The refrigeration and exhaust system can effectively ensure that heat and gas generated in the organic sewage treatment process are timely exhausted, and the normal and safe operation of the test is ensured.

Drawings

FIG. 1 is a schematic view of the structure of the present invention. In the figure: 1-an exhaust pipeline; 2, a draught fan; 3, a liquid storage tank; 4-cooling the pipeline; 5-a water chiller; 6-temperature measuring sensor; 7-a first infusion pipeline; 8, a ball valve I; 9-ball valve II; 10-a second infusion pipeline; 11-a water pump; 12-a transfusion pipeline III; 13-ball valve III; 14-transfusion pipeline four; 15-a flow meter; 16-a fifth infusion pipeline; 17-positive grounding electrode; 18-a rubber backing plate; 19-fixing the boron-doped diamond electrode; 20-sealing rubber ring; 21-rubber shaft seal one; 22-a linear bearing I; 23, a first guide shaft; 24-a pointer; 25-a scale; 26-negative terminal electrode; 27-moving the boron doped diamond electrode; 28-a spiral lifter; 29-connecting piece; 30-a second guide shaft; 31-rubber shaft seal II; 32-a linear bearing II; 33-a reactor shell; 34-a liquid return pipeline; 35-direct current power supply and electric control cabinet.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. With respect to the detailed description of these embodiments, it is to be understood that one skilled in the art can practice the invention and that other embodiments may be utilized and that changes and/or modifications may be made to the illustrated examples without departing from the spirit and scope of the appended claims. In addition, although specific features of the invention are disclosed in the embodiments, such specific features can be modified as appropriate to achieve the functions of the invention.

As shown in figure 1, the experimental device for treating the sewage by the boron-doped diamond electrode mainly comprises: exhaust pipeline 1, draught fan 2, liquid storage tank 3, cooling pipeline 4, water chiller 5, temperature measurement sensor 6, infusion pipeline 7, ball valve 8, ball valve two 9, infusion pipeline two 10, water pump 11, infusion pipeline three 12, ball valve three 13, infusion pipeline four 14, flowmeter 15, infusion pipeline five 16, positive wiring electrode 17, rubber back plate 18, fixed boron doped diamond electrode 19, sealing rubber ring 20, rubber shaft seal one 21, linear bearing one 22, guide shaft one 23, pointer 24, scale 25, negative wiring electrode 26, mobile boron doped diamond electrode 27, spiral lifter 28, connecting sheet 29, guide shaft two 30, rubber shaft seal two 31, linear bearing two 32, reactor shell 33, liquid return pipeline 34, direct current power supply and electric control cabinet 35 and the like, and the concrete structure is as follows:

according to the organic sewage flowing direction, a first infusion pipeline 7, a first ball valve 8, a second ball valve 9, a second infusion pipeline 10, a water pump 11, a third infusion pipeline 12, a third ball valve 13, a fourth infusion pipeline 14, a flow meter 15 and a fifth infusion pipeline 16 are sequentially connected to a pipeline communicated from a liquid storage tank 3 to a reactor shell 33, the first infusion pipeline 7 is communicated with the lower portion of the side face of the liquid storage tank 3, the fifth infusion pipeline 16 is communicated with the lower portion of the side face of the reactor shell 33, the upper portion of the side face of the reactor shell 33 is communicated with the upper portion of the side face of the liquid storage tank 3 through a liquid return pipeline 34, and the output end of a direct-current power supply and an electric control.

The upper part of the liquid storage tank 3 is sequentially connected with an induced draft fan 2 and an exhaust pipeline 1 for induced draft and exhaust; the inner cavity of the liquid storage tank 3 is provided with a cooling pipeline 4 and a temperature measuring sensor 6, the outside of the liquid storage tank 3 is provided with a water cooler 5 connected with the cooling pipeline 4, the temperature measuring sensor 6 is connected with the signal input end of a direct current power supply and an electric control cabinet 35 through a line, the output end of the direct current power supply and the electric control cabinet 35 is connected with the water cooler 5 through a line, and the opening and closing of the water cooler 5 are controlled according to the signal input by the temperature measuring sensor 6.

A fixed boron-doped diamond electrode 19 and a rubber back plate 18 are sequentially arranged on the left side in the reactor shell 33, the rubber back plate 18 is positioned on the outer side of the fixed boron-doped diamond electrode 19, the fixed boron-doped diamond electrode 19 is formed by growing a layer of boron-doped diamond film on a silicon wafer, the function of the fixed boron-doped diamond electrode is that electrolyzed water generates hydroxyl radicals which are used as strong oxidizers to quickly oxidize organic matters in water, and the positive wiring electrode 17 is led out of the reactor shell 33 from the fixed boron-doped diamond electrode 19; the right side in the reactor shell 33 is provided with a mobile boron-doped diamond electrode 27, the mobile boron-doped diamond electrode 27 is formed by growing a layer of boron-doped diamond film on a silicon wafer, the function of the mobile boron-doped diamond electrode is that electrolyzed water generates hydroxyl radicals which are used as strong oxidants to rapidly oxidize organic matters in water, the negative wiring electrode 26 is led out of the reactor shell 33 from the mobile boron-doped diamond electrode 27, and one end of the mobile boron-doped diamond electrode 27 and one end of the negative wiring electrode 26 are sealed in the sealing rubber ring 20.

The reactor shell 33 is cylindrical in shape, horizontally disposed, and has a horizontal central axis. The rubber back plate 18 and the fixed boron-doped diamond electrode 19 are of circular sheet structures, one side of the rubber back plate 18 is bonded to the inner wall of the left side of the reactor shell 33, a silicon wafer on one side of the fixed boron-doped diamond electrode 19 is bonded to the other side of the rubber back plate 18, and a boron-doped diamond film on the other side of the fixed boron-doped diamond electrode 19 is in contact with sewage in the reactor shell 33; the silicon wafer on one side of the moving boron-doped diamond electrode 27 is connected with the first guide shaft 23 and the second guide shaft 30, and the boron-doped diamond film on the other side of the moving boron-doped diamond electrode 27 is in contact with sewage in the reactor shell 33; the boron doped diamond film of the fixed boron doped diamond electrode 19 is disposed in the inner cavity of the reactor housing 33 opposite the boron doped diamond film of the moving boron doped diamond electrode 27. The sealing rubber ring 20 is of a cylindrical structure and is horizontally arranged, the central axis of the sealing rubber ring is horizontal, the sealing rubber ring 20 is bonded on the inner wall of the right side of the reactor shell 33, the whole mobile boron-doped diamond electrode 27 is wrapped, the mobile boron-doped diamond electrode 27 is of a circular sheet structure, the mobile boron-doped diamond electrode 27 is in sliding fit with the sealing rubber ring 20, and the sealing rubber ring 20 plays a role in dynamic sealing.

The middle upper part of the movable boron-doped diamond electrode 27 is fixedly connected with the second guide shaft 30, and the middle lower part of the movable boron-doped diamond electrode 27 is fixedly connected with the first guide shaft 23. Wherein:

the side surface of the part, which is positioned outside the reactor shell 33, of the second guide shaft 30 is sequentially provided with a second linear bearing 32 and a second rubber shaft seal 31, the second linear bearing 32 and the second rubber shaft seal 31 are fixed outside the reactor shell 33, the second guide shaft 30 is in sliding fit with the second linear bearing 32, and the second rubber shaft seal 31 is used for preventing sewage from leaking from the connection part of the second guide shaft 30 and the reactor shell 33 once the seal between the moving boron-doped diamond electrode 27 and the sealing rubber ring 20 fails, so that a secondary protection effect is achieved; and the end part of the second guide shaft 30, which is positioned outside the reactor shell 33, is provided with a connecting piece 29, one end of the connecting piece 29 is connected with the spiral lifter 28 through threads, and the spiral lifter 28 drives the connecting piece 29, the second guide shaft 30 and the movable boron-doped diamond electrode 27 in sequence.

The side face of the part, located outside the reactor shell 33, of the first guide shaft 23 is sequentially provided with a first linear bearing 22 and a first rubber shaft seal 21, the first linear bearing 22 and the first rubber shaft seal 21 are fixed outside the reactor shell 33, the first guide shaft 23 is in sliding fit with the first linear bearing 22, and the first rubber shaft seal 21 is used for preventing sewage from leaking from the connection part of the first guide shaft 23 and the reactor shell 33 once the seal between the moving boron-doped diamond electrode 27 and the sealing rubber ring 20 fails, so that a secondary protection effect is achieved; the end face of the part of the first guide shaft 23, which is positioned outside the reactor shell 33, is provided with a pointer 24 which is vertical to the first guide shaft 23, the pointer 24 corresponds to a scale 25 which is horizontally arranged outside the reactor shell 33, and the moving distance of the moving boron-doped diamond electrode 27 is determined by the moving distance of the pointer 24 along the scale 25.

In the invention, an exhaust pipeline 1, a liquid storage tank 3, a first infusion pipeline 7, a first ball valve 8, a second ball valve 9, a second infusion pipeline 10, a third infusion pipeline 12, a third ball valve 13, a fourth infusion pipeline 14, a flow meter 15, a fifth infusion pipeline 16, a reactor shell 33 and a liquid return pipeline 34 are all made of UPVC materials, and the outer surface of a cooling pipeline 4 and the inner cavity of a water pump 11 are sprayed with Teflon anticorrosive coatings.

The positive wiring electrode 17 and the fixed boron-doped diamond electrode 19 are bonded together by using conductive glue, the negative wiring electrode 26 and the moving boron-doped diamond electrode 27 are bonded together by using conductive glue, and the fixed boron-doped diamond electrode 19 and the moving boron-doped diamond electrode 27 keep parallel positions. The first guide shaft 23 and the second guide shaft 30 are respectively and vertically fixed on the moving boron-doped diamond electrode 27, and the first guide shaft 23 and the second guide shaft 30 are kept in parallel at two sides of a sewage channel in the reactor shell 33.

The present invention will be described in further detail below with reference to examples.