CN112067498B - In-water discharge H 2 O 2 Particle space-time density distribution measuring device and measuring method thereof - Google Patents
In-water discharge H 2 O 2 Particle space-time density distribution measuring device and measuring method thereof Download PDFInfo
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Abstract
In-water discharge H of the invention 2 O 2 Particle space-time density distribution measuring device and measuring method thereof, and conception of water discharge H 2 O 2 Particle space-time density distribution measuring device, wherein positive pulse is output by high-voltage pulse power supply, so that discharge channel is formed near needle electrode and H is formed 2 O 2 Particles, which are transferred from the needle electrode to the flat electrode, reflect H to the change of light intensity of 190nm wavelength when ultraviolet light passes through the needle electrode discharge region 2 O 2 Particle relative density, displayed on oscilloscope H 2 O 2 Particle light intensity. Meanwhile, the measuring method is provided, the triggering time of the oscilloscope is adjusted, so that the triggering of the oscilloscope is later than the triggering of a pulse power supply, and H is obtained 2 O 2 A time density distribution of particles; using delay flip-flopsTriggering pulse power supply to form discharge channel near needle electrode and make oscilloscope accept H 2 O 2 Particle, measurement H 2 O 2 Particle density to obtain H 2 O 2 The particles are spatially distributed.
Description
Technical Field
The invention relates to the field of water discharge, in particular to water discharge H 2 O 2 Particle space-time density distribution measuring device and measuring method thereof.
Background
In-water discharge technology has been rapidly developed in the past 20 years, and has remarkable effects in various fields such as biomedicine, environmental protection and the like. H as an active particle generated by discharge 2 O 2 Is a strong oxidant, has long survival time in aqueous solution and plays an important role in water treatment application. The effect of the active particles on the transfer of aqueous solutions is still far from clear, limiting H 2 O 2 The application of the particles in the field of water treatment.
The transmission effect of the active particles discharged in water is studied, the density distribution of the active particles in the water solution needs to be obtained, and the effects of bubble pulsation, temperature rise and the like are generated simultaneously due to the discharge in water, so that H is formed 2 O 2 Particles due to H 2 O 2 The particles survive for a longer time in the aqueous solution and are transferred to the depth of the solution under the synergistic effect of the pulsation and temperature rise effects of the bubbles, and the solution H is caused 2 O 2 The particle time and space density distribution are different. Therefore, there is an urgent need to find an in-water discharge H 2 O 2 Device and method for measuring space-time density distribution of particles to accurately measure discharge H in water 2 O 2 Density distribution of particles.
Disclosure of Invention
Aiming at the problems existing in the prior art, the invention creatively designs a water discharge H 2 O 2 Particle space-time density distribution measuring device, high-voltage pulse power supply outputs positive pulse, and the applied pulse voltage reaches between needle electrode and flat plate electrode of reactor, so that discharge channel is formed near needle electrode and H is formed 2 O 2 Particles, H 2 O 2 The particles are transferred from the needle electrode to the flat plate electrode under the action of bubble pulsation and liquid temperature rise, H 2 O 2 The characteristic wavelength of the particles is 190nm, and the change of the light intensity of the ultraviolet light with the wavelength of 190nm can reflect H when the ultraviolet light passes through the needle electrode discharge region 2 O 2 The relative density of the particles and finally displayed on an oscilloscope H 2 O 2 Particle light intensity. Meanwhile, the measuring method is provided, the triggering time of the oscilloscope is adjusted, so that the triggering of the oscilloscope is later than the triggering of a pulse power supply, and H is obtained 2 O 2 A time density distribution of particles; triggering pulse power supply by using delay trigger to form discharge channel near needle electrode, and making oscilloscope receive H at the position of set measuring point 2 O 2 Particle, measurement H 2 O 2 Particle density to obtain H 2 O 2 The particles are spatially distributed.
One of the technical schemes adopted for realizing the invention is as follows: in-water discharge H 2 O 2 A particle space-time density distribution measuring apparatus, comprising: photomultiplier 1, monochromator 2, first pinhole 3, high-voltage pulse power supply 4, discharge reactor 5, needle electrode 6, plate electrode 7, convex lens 8, ultraviolet lamp 9, positioning sensor 10, oscilloscope 11, delay trigger 12, high-voltage probe 13, water 14 and second pinhole 15; a discharge reactor 5 is arranged on the positioning sensor 10, a flat plate electrode 7 is arranged at the bottom in the discharge reactor 5, and water 14 is arranged in the discharge reactor 5; the oscilloscope 11 is electrically connected with the photomultiplier 1, and the photomultiplier 1 is connected with the light outlet end of the monochromator 2; the oscilloscope 11 is electrically connected with the delay trigger 12, the delay trigger 12 is electrically connected with the high-voltage pulse power supply 4, the high-voltage pulse power supply 4 is electrically connected with the high-voltage probe 13, the high-voltage probe 13 is electrically connected with one end of the needle electrode 6, and the other end of the needle electrode 6 is arranged in the discharge reactor 5 and stretches into water 14; the ultraviolet light lamp 9 is electrically connected with the delay trigger 12, a first pinhole 3 is arranged between the monochromator 2 and the discharge reactor 5, a second pinhole 15 and a convex lens 8 are sequentially arranged between the discharge reactor 5 and the ultraviolet light lamp 9, ultraviolet light emitted by the ultraviolet light lamp 9 sequentially passes through the center of the convex lens 8, the second pinhole 15, the discharge reactor 5 and the first pinhole 3, enters the light inlet end of the monochromator 2, and enters the photoelectric device through the light outlet of the monochromator 2A multiplier tube 1.
The diameters of the pinholes of the first pinhole 3 and the second pinhole 15 are 2mm;
the diameters of the pinholes of the first pinhole 3 and the second pinhole 15 are 4mm;
the second technical scheme adopted by the invention is as follows: said in-water discharge H 2 O 2 The measuring method related to the particle space-time density distribution measuring device is characterized by comprising the following steps:
1. measurement of H 2 O 2 Step of particle time distribution:
1) The high-voltage pulse power supply 4 is regulated to enable the external voltage of the discharge reactor 5 to reach 20kV, the pulse voltage reaches between the needle electrode 6 and the flat plate electrode 7 of the discharge reactor 5, a discharge channel is formed near the needle electrode 6, and H is formed 2 O 2 Particles; the flat plate electrode 7 is adjusted to make the distance between the needle electrode and the flat plate electrode 150mm;
2) The positioning sensor 10 is adjusted to enable the ultraviolet lamp 9 to emit a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity; delay flip-flop 12 is adjusted to make the time delay of the signal received by oscilloscope 11 as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s; 3) Starting a delay trigger 12, triggering and adjusting the high-voltage pulse power supply 4, recording a voltage waveform by the high-voltage probe 13, enabling the applied pulse voltage to reach between the needle electrode and the flat plate electrode of the discharge reactor 5, forming a discharge channel near the needle electrode 6, and forming H 2 O 2 Particles, H 2 O 2 Particles are transferred from the needle electrode 6 to the flat plate electrode 7 under the action of bubble pulsation and liquid temperature rise, the positioning sensor 10 is adjusted, the ultraviolet lamp 9 emits a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity, H is obtained 2 O 2 Particle density; meanwhile, delay flip-flop 12 delays the time that oscilloscope 11 receives the signal as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s, are shown on oscilloscope 11 to obtain H 2 O 2 A time density distribution of particles;
2. measurement of H 2 O 2 A step of spatial distribution of particles:
1) The high-voltage pulse power supply 4 is regulated to enable the external voltage of the discharge reactor 5 to reach 20kV, the pulse voltage reaches between the needle electrode 6 and the flat plate electrode 7 of the discharge reactor 5, a discharge channel is formed near the needle electrode 6, and H is formed 2 O 2 Particles; the flat plate electrode 7 is adjusted to make the distance between the needle electrode and the flat plate electrode 150mm;
2) Setting the central line of the needle electrode 6 as a y axis, setting the bus on the upper surface of the flat plate electrode 7 as an x axis, setting the intersection point of the x axis and the y axis as an origin O, adjusting the positioning sensor 10, and measuring the fixed measuring point in a range from-32 mm to 32mm and 0 to 150mm;
3) Triggering the high-voltage pulse power supply 4, recording voltage waveform by the high-voltage probe 13, and enabling the applied pulse voltage to reach between the needle electrode and the flat plate electrode of the discharge reactor 5 to form a discharge channel near the needle electrode 6 and form H 2 O 2 Particles, H 2 O 2 Particles are transferred from the needle electrode 6 to the flat plate electrode 7 under the action of bubble pulsation and liquid temperature rise, the positioning sensor 10 is adjusted, the ultraviolet lamp 9 emits a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity, H is obtained 2 O 2 Particle density; at the same time, the position sensor 10 is adjusted to obtain a more accurate density distribution in the vicinity of the needle electrode, or a greater range of H in the vicinity of the needle electrode and beyond 2 O 2 Particle space density distribution.
In-water discharge H of the invention 2 O 2 Particle space-time density distribution measuring device and measuring method thereofThe beneficial effects are as follows:
1. in-water discharge H 2 O 2 Particle space-time density distribution measuring device, the pulse voltage applied reaches between the needle electrode and the flat plate electrode of the reactor, the pulse power supply is regulated, the amplitude of the applied voltage between the needle electrode and the flat plate electrode can be regulated, the triggering time of the delay trigger can be regulated, and the measurement of H in water can be realized 2 O 2 Particle time density distribution, pinhole position adjustment in discharge region, and water H measurement 2 O 2 Particle space density distribution;
2. due to H 2 O 2 The characteristic wavelength of the particles is 190nm, and the change of the ultraviolet light on the light intensity with the wavelength of 190nm when passing through the needle electrode discharge region can reflect H 2 O 2 The relative density of the particles and finally displayed on an oscilloscope H 2 O 2 The particle light intensity is used for calculating H according to the difference of the light intensities of the light entering and exiting the discharge reactor 2 O 2 Particle relative density;
3. in-water discharge H 2 O 2 The particle space-time density distribution measuring method has the advantages of simple process, convenient operation and realization of in-situ real-time measurement of H 2 O 2 The particle density distribution can meet the range and the precision of the spatial distribution measurement due to the adoption of pinholes with two diameters;
4. the measuring device and the measuring method are applicable to long-life active particles generated in the discharge mode, such as streamer discharge, dielectric barrier discharge, arc discharge and the like.
Drawings
FIG. 1 is a schematic diagram of a device for measuring distribution of active particles with long life in water by discharging;
FIG. 2 is a graph showing the measurement of H in water in the examples 2 O 2 A particle space positioning schematic diagram A;
FIG. 3 is a graph showing the measurement of H in water in the examples 2 O 2 A particle space positioning schematic diagram B;
in the figure: 1. photomultiplier tube, monochromator, 3, first pinhole, 4, high voltage pulse power supply, 5, discharge reactor, 6, needle electrode, 7, plate electrode, 8, convex lens, 9, ultraviolet lamp, 10, positioning sensor, 11, oscilloscope, 12, delay trigger, 13, high voltage probe, 14, water, 15, second pinhole.
Detailed Description
The present invention is described in further detail below with reference to the drawings and the specific embodiments, which are described herein for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Referring to fig. 1, in-water discharge H 2 O 2 A particle space-time density distribution measuring apparatus, comprising: photomultiplier 1, monochromator 2, first pinhole 3, high-voltage pulse power supply 4, discharge reactor 5, needle electrode 6, plate electrode 7, convex lens 8, ultraviolet lamp 9, positioning sensor 10, oscilloscope 11, delay trigger 12, high-voltage probe 13, water 14 and second pinhole 15; a discharge reactor 5 is arranged on the positioning sensor 10, a flat plate electrode 7 is arranged at the bottom in the discharge reactor 5, and water 14 is arranged in the discharge reactor 5; the oscilloscope 11 is electrically connected with the photomultiplier 1, and the photomultiplier 1 is connected with the light outlet end of the monochromator 2; the oscilloscope 11 is electrically connected with the delay trigger 12, the delay trigger 12 is electrically connected with the high-voltage pulse power supply 4, the high-voltage pulse power supply 4 is electrically connected with the high-voltage probe 13, the high-voltage probe 13 is electrically connected with one end of the needle electrode 6, and the other end of the needle electrode 6 is arranged in the discharge reactor 5 and stretches into water 14; the ultraviolet light lamp 9 is electrically connected with the delay trigger 12, the first pinhole 3 is arranged between the monochromator 2 and the discharge reactor 5, the second pinhole 15 and the convex lens 8 are sequentially arranged between the discharge reactor 5 and the ultraviolet light lamp 9, ultraviolet light emitted by the ultraviolet light lamp 9 sequentially passes through the center of the convex lens 8, the second pinhole 15, the discharge reactor 5 and the first pinhole 3, enters the light inlet end of the monochromator 2, and enters the photomultiplier 1 through the light outlet of the monochromator 2.
Example 1: with reference to fig. 1, the first pinhole 3 and the second pinhole 15 are each 2mm in pinhole diameter.
In-water discharge H 2 O 2 The particle space-time density distribution measuring method comprises the following steps:
1. measurement of H 2 O 2 Particle time divisionA cloth step:
2) The high-voltage pulse power supply 4 is regulated to enable the external voltage of the discharge reactor 5 to reach 20kV, the pulse voltage reaches between the needle electrode 6 and the flat plate electrode 7 of the discharge reactor 5, a discharge channel is formed near the needle electrode 6, and H is formed 2 O 2 Particles; the flat plate electrode 7 is adjusted to make the distance between the needle electrode and the flat plate electrode 150mm;
2) The positioning sensor 10 is adjusted to enable the ultraviolet lamp 9 to emit a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity; delay flip-flop 12 is adjusted to make the time delay of the signal received by oscilloscope 11 as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s; 3) Starting a delay trigger 12, triggering and adjusting the high-voltage pulse power supply 4, recording a voltage waveform by the high-voltage probe 13, enabling the applied pulse voltage to reach between the needle electrode and the flat plate electrode of the discharge reactor 5, forming a discharge channel near the needle electrode 6, and forming H 2 O 2 Particles, H 2 O 2 Particles are transferred from the needle electrode 6 to the flat plate electrode 7 under the action of bubble pulsation and liquid temperature rise, the positioning sensor 10 is adjusted, the ultraviolet lamp 9 emits a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity, H is obtained 2 O 2 Particle density; meanwhile, delay flip-flop 12 delays the time that oscilloscope 11 receives the signal as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s, are shown on oscilloscope 11 to obtain H 2 O 2 A time density distribution of particles;
2. measurement of H 2 O 2 A step of spatial distribution of particles:
1) The high-voltage pulse power supply 4 is regulated to enable the external voltage of the discharge reactor 5 to reach 20kV, and the pulse voltage reaches the discharge reactionBetween the needle electrode 6 and the plate electrode 7 of the device 5, a discharge channel is formed near the needle electrode 6, and H is formed 2 O 2 Particles; the flat plate electrode 7 is adjusted to make the distance between the needle electrode and the flat plate electrode 150mm;
2) Setting the central line of the needle electrode 6 as a y axis, setting the generatrix of the upper surface of the flat plate electrode 7 as an x axis, setting the intersection point of the x axis and the y axis as an origin O, adjusting the positioning sensor 10, and measuring the fixed measuring point in a measuring range that the x axis is from-9 mm to 9mm, the circle centers of adjacent pinholes are 2mm apart, measuring 9 pinhole distances in total, the y axis is from y=100 mm to y=150 mm, the circle centers of adjacent pinholes are 2mm apart, and measuring 25 pinhole distances in total, as shown in figure 3;
3) Triggering the high-voltage pulse power supply 4, recording voltage waveform by the high-voltage probe 13, and enabling the applied pulse voltage to reach between the needle electrode and the flat plate electrode of the discharge reactor 5 to form a discharge channel near the needle electrode 6 and form H 2 O 2 Particles, H 2 O 2 Particles are transferred from the needle electrode 6 to the flat plate electrode 7 under the action of bubble pulsation and liquid temperature rise, the positioning sensor 10 is adjusted, the ultraviolet lamp 9 emits a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity, H is obtained 2 O 2 Particle density; at the same time, the position sensor 10 is adjusted to obtain a more accurate density distribution in the vicinity of the needle electrode.
Example 2: with reference to fig. 1, the first pinhole 3 and the second pinhole 15 are each 4mm in pinhole diameter.
In-water discharge H 2 O 2 The particle space-time density distribution measuring method comprises the following steps:
1. measurement of H 2 O 2 Step of particle time distribution:
1) The high-voltage pulse power supply 4 is regulated to enable the external voltage of the discharge reactor 5 to reach 20kV, the pulse voltage reaches between the needle electrode 6 and the flat plate electrode 7 of the discharge reactor 5, a discharge channel is formed near the needle electrode 6, and H is formed 2 O 2 Particles;the flat plate electrode 7 is adjusted to make the distance between the needle electrode and the flat plate electrode 150mm;
2) The positioning sensor 10 is adjusted to enable the ultraviolet lamp 9 to emit a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity; delay flip-flop 12 is adjusted to make the time delay of the signal received by oscilloscope 11 as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s; 3) Starting a delay trigger 12, triggering and adjusting the high-voltage pulse power supply 4, recording a voltage waveform by the high-voltage probe 13, enabling the applied pulse voltage to reach between the needle electrode and the flat plate electrode of the discharge reactor 5, forming a discharge channel near the needle electrode 6, and forming H 2 O 2 Particles, H 2 O 2 The particles are transferred from the needle electrode 6 to the flat plate electrode 7 under the action of bubble pulsation and liquid temperature rise to obtain H 2 O 2 Particle density; meanwhile, delay flip-flop 12 delays the time that oscilloscope 11 receives the signal as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s, are shown on oscilloscope 11 to obtain H 2 O 2 A time density distribution of particles; 2. measurement of H 2 O 2 A step of spatial distribution of particles:
1) The high-voltage pulse power supply 4 is regulated to enable the external voltage of the discharge reactor 5 to reach 20kV, the pulse voltage reaches between the needle electrode 6 and the flat plate electrode 7 of the discharge reactor 5, a discharge channel is formed near the needle electrode 6, and H is formed 2 O 2 Particles; the flat plate electrode 7 is adjusted to make the distance between the needle electrode and the flat plate electrode 150mm;
2) Setting the central line of the needle electrode 6 as a y axis, setting the generatrix of the upper surface of the flat plate electrode 7 as an x axis, setting the intersection point of the x axis and the y axis as an origin O, adjusting the positioning sensor 10, and measuring the fixed measuring point in a measuring range that the x axis is from 0 to 32mm, the circle centers of adjacent pinholes are separated by 4mm, measuring 8 pinhole distances in total, the y axis is from 50 to 150mm, the circle centers of adjacent pinholes are separated by 4mm, and measuring 25 pinhole distances in total, as shown in figure 2;
3) Triggering high voltage pulse power supply 4, highThe voltage probe 13 records the voltage waveform, and the pulse voltage applied reaches the position between the needle electrode and the flat plate electrode of the discharge reactor 5 to form a discharge channel near the needle electrode 6 and form H 2 O 2 Particles, H 2 O 2 Particles are transferred from the needle electrode 6 to the flat plate electrode 7 under the action of bubble pulsation and liquid temperature rise, the positioning sensor 10 is adjusted, the ultraviolet lamp 9 emits a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens 8, the second pinhole 15, the discharge area of the needle electrode 6 between the needle electrode and the flat plate electrode in the discharge reactor 5, the first pinhole 3, the monochromator 2 and the photomultiplier 1, and finally H is displayed on the oscilloscope 11 2 O 2 Particle light intensity, H is obtained 2 O 2 Particle density; at the same time, the position sensor 10 is adjusted to obtain H in the vicinity of the needle electrode and in a larger range outside 2 O 2 Particle space density distribution.
The foregoing is merely a preferred embodiment of the invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the invention, which are intended to be comprehended within the scope of the invention.
Claims (4)
1. In-water discharge H 2 O 2 A particle space-time density distribution measuring apparatus, comprising: the device comprises a photomultiplier (1), a monochromator (2), a first pinhole (3), a high-voltage pulse power supply (4), a discharge reactor (5), a needle electrode (6), a flat electrode (7), a convex lens (8), an ultraviolet lamp (9), a positioning sensor (10), an oscilloscope (11), a delay trigger (12), a high-voltage probe (13), water (14) and a second pinhole (15); a discharge reactor (5) is arranged on the positioning sensor (10), a flat electrode (7) is arranged at the bottom of the discharge reactor (5), and water (14) is arranged in the discharge reactor (5); the oscilloscope (11) is electrically connected with the photomultiplier (1), and the photomultiplier (1) is connected with the light outlet end of the monochromator (2); the oscilloscope (11) is electrically connected with the delay trigger (12), the delay trigger (12) is electrically connected with the high-voltage pulse power supply (4), the high-voltage pulse power supply (4) is electrically connected with the high-voltage probe (13) and is used for high voltageThe probe (13) is electrically connected with one end of the needle electrode (6), and the other end of the needle electrode (6) is arranged in the discharge reactor (5) and stretches into water (14); the ultraviolet light lamp (9) be connected with time delay trigger (12) monochromator (2) and discharge reactor (5) between set up first pinhole (3) discharge reactor (5) and ultraviolet light lamp (9) between set gradually second pinhole (15) and convex lens (8), ultraviolet light lamp (9) transmit ultraviolet light and loop through convex lens (8) center, second pinhole (15), discharge reactor (5), first pinhole (3), get into monochromator (2) light entry end, through monochromator (2) light outlet entering photomultiplier (1).
2. In-water discharge H according to claim 1 2 O 2 The measuring method related to the particle space-time density distribution measuring device is characterized in that the diameters of the pinholes of the first pinhole (3) and the second pinhole (15) are 2mm.
3. In-water discharge H according to claim 1 2 O 2 The measuring method related to the particle space-time density distribution measuring device is characterized in that the diameters of the pinholes of the first pinhole (3) and the second pinhole (15) are 4mm.
4. An in-water discharge H as claimed in claim 1, claim 2 or claim 3 2 O 2 The measuring method related to the particle space-time density distribution measuring device is characterized by comprising the following steps:
1. measurement of H 2 O 2 Step of particle time distribution:
1) The high-voltage pulse power supply (4) is regulated to enable the external voltage of the discharge reactor (5) to reach 20kV, and the pulse voltage reaches between the needle electrode (6) and the flat plate electrode (7) of the discharge reactor (5), so that a discharge channel is formed near the needle electrode (6) and H is formed 2 O 2 Particles; adjusting the flat electrode (7) to make the distance between the needle electrode and the flat electrode be 150mm;
2) The positioning sensor (10) is regulated to enable the ultraviolet lamp (9) to emit a beam of ultraviolet light, and the ultraviolet light sequentially passes through the convex lens (8),A second pinhole (15), a discharge area of a needle electrode-plate electrode interelectrode needle electrode (6) in the discharge reactor (5), a first pinhole (3), a monochromator (2), a photomultiplier (1), and finally H is displayed on an oscilloscope (11) 2 O 2 Particle light intensity; the delay trigger (12) is adjusted to make the time delay of the signal received by the oscilloscope (11) as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s;
3) A delay trigger (12) is started to trigger and regulate a high-voltage pulse power supply (4), a high-voltage probe (13) records a voltage waveform, and the applied pulse voltage reaches between a needle electrode and a flat plate electrode of a discharge reactor (5) to form a discharge channel near the needle electrode (6) and form H 2 O 2 Particles, H 2 O 2 The particles are transferred from the needle electrode (6) to the flat plate electrode (7) under the action of bubble pulsation and liquid temperature rise, the positioning sensor (10) is regulated, the ultraviolet lamp (9) emits a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens (8), the second pinhole (15), in the discharge reactor (5), the discharge area of the needle electrode (6) between the needle electrode and the flat plate electrode, the first pinhole (3), the monochromator (2) and the photomultiplier (1), and finally H is displayed on the oscilloscope (11) 2 O 2 Particle light intensity, H is obtained 2 O 2 Particle density; meanwhile, the delay trigger (12) delays the time of the signal received by the oscilloscope (11) as follows: 1ms, 5ms, 10ms, 50ms, 100ms, 500ms, 1s, 10s and 60s, are displayed on an oscilloscope (11) to obtain H 2 O 2 A time density distribution of particles;
2. measurement of H 2 O 2 A step of spatial distribution of particles:
1) The high-voltage pulse power supply (4) is regulated to enable the external voltage of the discharge reactor (5) to reach 20kV, and the pulse voltage reaches between the needle electrode (6) and the flat plate electrode (7) of the discharge reactor (5), so that a discharge channel is formed near the needle electrode (6) and H is formed 2 O 2 Particles; adjusting the flat electrode (7) to make the distance between the needle electrode and the flat electrode be 150mm;
2) Setting the central line of the needle electrode (6) as a y axis, setting the bus on the upper surface of the flat plate electrode (7) as an x axis, setting the intersection point of the x axis and the y axis as an origin O, adjusting the positioning sensor (10), and fixing the measuring point in a measuring range of from-32 mm to 32mm and from 0 to 150mm;
3) Triggering a high-voltage pulse power supply (4), recording a voltage waveform by a high-voltage probe (13), enabling the applied pulse voltage to reach between a needle electrode and a flat plate electrode of a discharge reactor (5), forming a discharge channel near the needle electrode (6), and forming H 2 O 2 Particles, H 2 O 2 The particles are transferred from the needle electrode (6) to the flat plate electrode (7) under the action of bubble pulsation and liquid temperature rise, the positioning sensor (10) is regulated, the ultraviolet lamp (9) emits a beam of ultraviolet light, the ultraviolet light sequentially passes through the convex lens (8), the second pinhole (15), in the discharge reactor (5), the discharge area of the needle electrode (6) between the needle electrode and the flat plate electrode, the first pinhole (3), the monochromator (2) and the photomultiplier (1), and finally H is displayed on the oscilloscope (11) 2 O 2 Particle light intensity, H is obtained 2 O 2 Particle density; at the same time, the position sensor (10) is adjusted to obtain more accurate density distribution of the area near the needle electrode, or H in the area near the needle electrode and beyond 2 O 2 Particle space density distribution.
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