Method and equipment for preparing hydrogen peroxide

Abstract

The invention relates to the technical field of plasma synthetic chemicals, and discloses a method and equipment for preparing hydrogen peroxide, and the method comprises the following steps: detecting the environment humidity of a target area in real time, and adjusting the environment humidity to a preset value; when the environment humidity reaches a preset value, pulse discharge voltage is set to be lower than spark discharge voltage and higher than streamer discharge voltage, high-voltage discharge reaction is conducted on the target area, and high-concentration hydrogen peroxide is prepared. According to the method, hydrogen peroxide can be directly prepared from air, the ozone concentration is effectively controlled, and safer, more efficient and more stable sterilization is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of plasma synthesis chemicals, and in particular to a method for preparing hydrogen peroxide and a device thereof. Background Art

[0002] At present, there are two main ways of sterilization: the first is to introduce air into the sterilization component. The main technologies include: ultraviolet sterilization irradiation, low-temperature plasma and photocatalytic oxidation. These components can be installed in the air handling device and inactivate pathogens when the air passes through the air handling device, but they cannot solve the problems of surface contamination or air dead corners. The second is to disperse the inactivator into the space. The main technology is similar to the previous method, the difference is that the inactivator is dispersed throughout the space, so that it can kill both bacteria in the space and microorganisms on the surface of objects.

[0003] However, currently, inactivators such as ultraviolet rays, sterilizing substances, and ozone are harmful to the human body, and humans and machines cannot coexist; and some active groups such as hydroxyl radicals, positive and negative ions, and negative ions have short life spans and cannot spread throughout the space, which all have some limitations. Hydrogen peroxide has the advantages of being safer, more efficient, and more stable than ozone, but it is produced from the air, and the byproduct ozone concentration is high, which will harm human health. Summary of the invention

[0004] In view of this, the present invention provides a method and apparatus for preparing hydrogen peroxide to solve the problem that hydrogen peroxide cannot be prepared directly from air while effectively controlling the ozone concentration.

[0005] In a first aspect, the present invention provides a method for producing hydrogen peroxide, the method comprising: detecting the ambient humidity of a target area in real time, and adjusting the ambient humidity to a preset value, the target area being an air area within a preset range; when the ambient humidity reaches the preset value, setting a pulse discharge voltage lower than a spark discharge voltage and higher than a streamer discharge voltage, performing a high-voltage discharge reaction on the target area, and producing high-concentration hydrogen peroxide.

[0006] The invention provides a method for preparing hydrogen peroxide, which adopts high-voltage pulse discharge technology to directly prepare hydrogen peroxide from high-humidity air, can efficiently purify the air and achieve the function of inactivation and sterilization.

[0007] In an optional embodiment, the method further includes: if the ambient humidity does not reach a preset value, setting the pulse discharge voltage to be lower than the streamer discharge voltage and higher than the ignition voltage, performing a high-voltage discharge reaction on the target area to produce trace ozone and charged ions.

[0008] The present invention proposes a mode in which, when the ambient humidity does not reach the preset value, the pulse discharge voltage is set slightly higher than the ignition voltage. The limitation of the pulse discharge voltage mainly depends on the ozone production in the reactor being lower than the safety standard value. In this mode, the reactor mainly produces trace ozone and charged positive / negative ions for disinfection, effectively realizing the use of trace ozone and charged ions to sterilize the air without endangering personal safety.

[0009] In an optional embodiment, the method further includes: in the process of preparing high-concentration hydrogen peroxide, detecting the concentration change rate of hydrogen peroxide and ozone in real time; and adjusting the pulse discharge voltage according to the comparison result between the concentration change rate and the preset concentration change rate.

[0010] The present invention proposes an intelligent continuous control mode, which detects the concentration changes of hydrogen peroxide and ozone in real time, and adjusts the pulse discharge voltage according to the comparison between the change rate and the preset rate, thereby realizing intelligent and continuous control of the production of hydrogen peroxide and ensuring high-efficiency production of hydrogen peroxide.

[0011] In an optional implementation, performing a high-voltage discharge reaction on the target area includes: the high-voltage discharge reaction is one of a corona discharge and a dielectric barrier discharge.

[0012] In a second aspect, the present invention provides an apparatus for producing hydrogen peroxide, the apparatus comprising: a high-voltage reactor for emitting a pulse discharge voltage; a humidity sensor for acquiring humidity data of an environment or an electric field around the high-voltage reactor; a microenvironment adjustment unit for adjusting the humidity around the electric field based on the humidity data; and a controller for reading the humidity data of the humidity sensor, controlling the microenvironment adjustment unit to adjust the humidity, and setting the pulse discharge voltage of the high-voltage reactor.

[0013] The present invention introduces a device for preparing hydrogen peroxide, which can directly prepare high-concentration hydrogen peroxide from the air at high humidity; when the humidity is lower than a preset value, trace amounts of ozone and charged ions are prepared for disinfection, thereby achieving the functions of efficiently purifying the air and inactivating and sterilizing.

[0014] In an optional embodiment, the device further comprises: a high voltage power supply for providing energy input to the high voltage reactor.

[0015] The invention introduces a high voltage power supply to provide energy input to the device for preparing hydrogen peroxide.

[0016] In an optional embodiment, the device further includes: a gas concentration change detector for detecting the concentration change rate of hydrogen peroxide and ozone in the target area.

[0017] The present invention introduces a gas concentration change detector for real-time detection of the concentration change rate of hydrogen peroxide and ozone, and adjusts the pulse discharge voltage according to the comparison between the change rate and the preset rate, thereby realizing intelligent and continuous control of the production of hydrogen peroxide and ensuring efficient production of hydrogen peroxide.

[0018] In an optional embodiment, the discharge electrode of the high-voltage reactor is a nano-carbon material, a type of low-resistance conductive adhesive material.

[0019] In an optional embodiment, the microenvironment adjustment unit is a semi-sealed box and a semiconductor refrigeration; the semiconductor condensation is integrated with the discharge electrode or the grounding electrode, and the electrode is coated with a water-absorbing material or at least one water-absorbing material is placed between the discharge field. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic flow chart of a method for preparing hydrogen peroxide according to an embodiment of the present invention;

[0022] Figure 2 is a schematic diagram of a process for preparing hydrogen peroxide by adopting an intelligent continuous control method according to an embodiment of the present invention;

[0023] Figure 3 is a graph showing different discharge threshold voltages of a corona discharge reactor under different electrode spacing conditions according to an embodiment of the present invention;

[0024] Figure 4 It is a graph showing the change of hydrogen peroxide and ozone concentrations in the device under the conditions of Hv=88.7% (solid line) and Hv=60.4% (dashed line) according to an embodiment of the present invention;

[0025] Figure 5 is a graph of ozone and hydrogen peroxide generation under the conditions of Hv=86% and high voltage power supply voltage of +7kV and -7kV according to an embodiment of the present invention;

[0026] Figure 6 This is a graph of the amount of ozone and hydrogen peroxide produced under the condition of Hv=87.3% and the high voltage power supply using a pulse power supply or a DC power supply and the voltage being +7kV according to an embodiment of the present invention;

[0027] Figure 7 85.8% and the amount of hydrogen peroxide produced at different pulse peak voltages according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] The embodiment of the present invention provides a method and device for preparing hydrogen peroxide, so as to solve the problem that hydrogen peroxide cannot be prepared directly from the air while effectively controlling the ozone concentration.

[0031] like Figure 1 As shown, the process includes the following steps:

[0032] Step S101, real-time detection of the ambient humidity Hv of the target area, and adjustment of the ambient humidity Hv to a preset value, the target area being an air area within a preset range.

[0033] In this embodiment, the ambient humidity Hv of the target area is detected in real time by a humidity sensor, and the ambient humidity Hv of the target area is adjusted to a preset value by a micro-environment adjustment unit.

[0034] Step S102, when the ambient humidity Hv reaches a preset value, the pulse discharge voltage is set to be lower than the spark discharge voltage Vs and higher than the streamer discharge voltage Vps, and a high-voltage discharge reaction is performed on the target area to produce high-concentration hydrogen peroxide.

[0035] In this embodiment, when the ambient humidity Hv reaches a preset value, the pulse discharge voltage is controlled to be between the streamer discharge voltage Vps and the spark discharge voltage Vs, and a high-voltage discharge reaction is performed through the high-voltage reactor, which can significantly improve the generation efficiency of hydrogen peroxide.

[0036] In this embodiment, a method for producing hydrogen peroxide is provided. When the humidity is greater than or equal to a set threshold, hydrogen peroxide is started to be produced, the reactor enters a high-intensity discharge state, the pulse discharge voltage is between the spark discharge voltage Vs and the streamer discharge voltage Vps, and the required electrical parameters are adjusted as needed.

[0037] In an optional embodiment, the method further includes: if the ambient humidity Hv does not reach a preset value, setting the pulse discharge voltage to be lower than the streamer discharge voltage Vps and higher than the ignition voltage Vg, performing a high-voltage discharge reaction on the target area to produce trace ozone and charged ions.

[0038] In this embodiment, when the humidity has not reached the set threshold, the pulse discharge voltage of the reactor is slightly higher than the ignition voltage Vg. The limitation of the pulse discharge voltage mainly depends on the ozone production of the reactor being lower than the safety standard value. In this mode, the reactor mainly produces trace amounts of ozone and positive / negative ions to disinfect the environment.

[0039] For safety reasons, the start time of the module can be controlled by calibrating the amount of hydrogen peroxide and ozone produced, and the start time of the module can also be controlled by using a sensor to detect the concentration.

[0040] In an optional embodiment, the method further includes: in the process of preparing high-concentration hydrogen peroxide, detecting the concentration change rate of hydrogen peroxide and ozone in real time; and adjusting the pulse discharge voltage according to the comparison result between the concentration change rate and the preset concentration change rate.

[0041] In this embodiment, Figure 2 As shown, by detecting the concentration changes of hydrogen peroxide and ozone in real time and adjusting the pulse discharge voltage according to the comparison between the change rate and the preset rate, the production of hydrogen peroxide can be intelligently and continuously controlled to ensure efficient production of hydrogen peroxide.

[0042] In an optional embodiment, the high voltage discharge reaction is one of corona discharge and dielectric barrier discharge.

[0043] Taking the corona discharge reactor as an example, Figure 3 It can be seen from the discharge mode process that during the corona discharge process, as the voltage increases, the discharge mode will change. The key threshold voltages are: starting voltage Vg, streamer discharge voltage Vps and spark discharge voltage Vs.

[0044] The starting voltage Vg is the voltage value when the reactor just starts to glow discharge; the streamer discharge voltage Vps is the voltage value when the reactor changes from glow discharge to streamer discharge; and the spark discharge voltage Vs is the voltage value when the reactor changes from streamer discharge to spark discharge.

[0045] When the voltage is between the starting voltage Vg and the streamer discharge voltage Vps, corona discharge is mainly generated. The electric field strength is concentrated around the discharge tip. The farther away from the tip, the more rapidly the electric field strength decreases, showing the phenomenon of strong glow discharge around the electrode. At this time, the action range of the reactor is very small, mainly concentrated around the discharge electrode. After the voltage reaches the streamer discharge voltage Vps, a large number of photons and electrons generated in the starting voltage Vg stage move to the anode, but the ions with large mass and slow movement do not migrate, but slowly gather near the anode, causing a sharp increase in the positive charge in front of the anode, resulting in the distortion of the space electric field. The strong effect of the distorted electric field prompts the photoelectrons to undergo electron collapse again, that is, secondary ionization, and the secondary ionization directs the streamer direction to the cathode. As the secondary ionization continues to occur, the streamer expands to the position near the cathode. Further increase the voltage to reach Vs, the discharge gap breaks down, the channel resistance becomes very small, the current will suddenly rise, the voltage of the discharge gap drops instantly, and the spark discharge is very likely to cause a load short circuit, which should be avoided.

[0046] It is generally believed that the production of hydrogen peroxide is through the ionization of water molecules to produce OH free radicals, and two OH free radicals reform to form hydrogen peroxide, so the production of hydrogen peroxide requires a larger electric field strength. Therefore, in this method, the voltage at both ends of the reactor should be controlled between the ignition voltage Vg and the spark discharge voltage Vs. In order to improve the production efficiency of hydrogen peroxide, it is preferably controlled between the streamer discharge voltage Vps and the spark discharge voltage Vs.

[0047] The present embodiment provides an apparatus for producing hydrogen peroxide, which is used to implement the above-mentioned embodiment and any optional implementation manner, including: a high-voltage reactor, which is used to emit a pulse discharge voltage; a humidity sensor, which is used to obtain humidity data around the environment or the electric field of the high-voltage reactor; a microenvironment adjustment unit, which is used to adjust the humidity around the electric field based on the humidity data; and a controller, which is used to read the humidity data of the humidity sensor, control the microenvironment adjustment unit to adjust the humidity, and set the pulse discharge voltage of the high-voltage reactor.

[0048] In this embodiment, the high-voltage reactor can be a corona discharge reactor or a dielectric barrier discharge (DBD) reactor; the humidity sensor is used to obtain humidity data around the environment or the reactor electric field to adjust the working state of the reactor, and can be installed at the inlet or outlet of the reactor; the microenvironment adjustment unit is used to adjust the humidity around the electric field, increase the humidity around the reactor, make the environment of the reactor conducive to the generation of hydrogen peroxide, and improve the environmental adaptability of the reactor.

[0049] In an optional embodiment, the device further comprises: a high voltage power supply for providing energy input to the high voltage reactor.

[0050] In this embodiment, the high-voltage power supply provides energy input for the reactor, and can provide DC positive (negative) high voltage, AC high voltage, and pulse high voltage.

[0051] In an optional embodiment, the device further includes: a gas concentration change detector for detecting the concentration change rate of hydrogen peroxide and ozone in the target area.

[0052] In an optional embodiment, the high-voltage reactor further comprises: a discharge electrode of the high-voltage reactor is a nano-carbon material, a low-resistance conductive adhesive material.

[0053] In an optional embodiment, the microenvironment regulating unit also includes: the microenvironment regulating unit is a semi-sealed box and a semiconductor refrigeration; the semiconductor condensation is integrated with the discharge electrode or the grounding electrode, and the electrode is coated with a water-absorbing material or at least one water-absorbing material is placed between the discharge field.

[0054] According to the above embodiment, this embodiment provides a specific example, and the parameters are set as follows:

[0055] (1) The high-pressure reactor adopts a bipolar needle-plate reactor, wherein the needle electrode is a high-voltage electrode and the plate electrode is a reference electrode; wherein the needle-plate electrode is made of a stainless steel metal sheet and is 100 mm long; wherein the plate electrode is made of a stainless steel sheet with a thickness of 10 mm and a width of 50 mm; wherein the needle electrode has a needle tip length of 30 mm and a needle tip bottom width of 10 mm; wherein the needle electrode has 18 needle tips on one side; wherein the interval between each needle tip is 20 mm; wherein in the embodiment, the needle electrode and the plate electrode are placed opposite each other, and the needle tip is 25 mm away from the plate electrode.

[0056] (2) In this embodiment, the electrodes are fixed by a plastic part, and the plastic part has multiple holes to allow water molecules in the air to enter the discharge space.

[0057] (3) In this embodiment, a fan is used to bring air with different humidity levels into the discharge space.

[0058] (4) In this embodiment, the humidity sensor uses a humidity sensing electronic module with a resolution of 0.1% and a response time of 1 s.

[0059] (5) In this embodiment, the microenvironment adjustment unit adopts a semiconductor condensation atomization module. After the semiconductor condenses and collects water, it is released into the high-energy discharge space through the atomization device.

[0060] (6) In this embodiment, the high voltage power supply adopts a high voltage pulse discharge power supply with a pulse width of 1s, a high voltage pulse of +7kV, and a platform voltage of 0V.

[0061] (7) In this embodiment, the humidity sensor, microenvironment adjustment unit, high-voltage reactor and high-voltage power supply are connected through an electronic circuit board. In order to compare the effects of high and low humidity on the amount of ozone and hydrogen peroxide produced by the device, the ambient humidity Hv and the threshold humidity Hv1 are set to 85%. High humidity environment logic: Turn on the device, the humidity sensor detects the current ambient humidity Hv, when the ambient humidity Hv ≤ the threshold humidity Hv1, turn on the microenvironment regulator, when the humidity reaches the threshold humidity Hv1, turn on the high-voltage reactor. Low humidity conditions are tested under the condition that the test environment humidity Hv is controlled to be around 60%.

[0062] (8) Hydrogen peroxide and ozone concentration tests under high and low humidity conditions Figure 4 As shown in Table 1 and Table 2:

[0063] Table 1 Ozone and hydrogen peroxide production under the condition of Hv = 88.7%

[0064]

[0065] Table 2 Ozone and hydrogen peroxide production under Hv=60.4% condition

[0066]

[0067] like Figure 4 As shown in Tables 1 and 2, high humidity is beneficial to increasing the amount of hydrogen peroxide produced by the device.

[0068] According to the above embodiment, this embodiment provides another specific example, and the parameters are set as follows:

[0069] (1) In this embodiment, the high-pressure reactor adopts a bipolar needle-plate reactor, wherein the needle electrode is the high-voltage electrode and the plate electrode is the reference electrode; wherein the needle-plate electrode is made of a stainless steel metal sheet and is 100 mm long; wherein the plate electrode is made of a stainless steel sheet with a thickness of 10 mm and a width of 50 mm; wherein the needle electrode has a needle tip length of 30 mm and a needle tip bottom width of 10 mm; wherein the number of needle tips on one side of the needle electrode is 18; wherein the interval between each needle tip is 20 mm; wherein in the embodiment, the needle electrode and the plate electrode are placed opposite each other, and the needle tip is 25 mm away from the plate electrode.

[0070] (2) In this embodiment, the electrodes are fixed by a plastic part, and the plastic part has multiple holes to allow water molecules in the air to enter the discharge space.

[0071] (3) In this embodiment, a fan is used to bring air with different humidity levels into the discharge space.

[0072] (4) In this embodiment, the humidity sensor uses a humidity sensing electronic module with a resolution of 0.1% and a response time of 1 s.

[0073] (5) In this embodiment, the microenvironment adjustment unit adopts a semiconductor condensation atomization module. After the semiconductor condenses and collects water, it is released into the high-energy discharge space through the atomization device.

[0074] (6) In this embodiment, the high voltage power supply adopts a high voltage pulse discharge power supply with a pulse width of 1s, a high voltage pulse of +7kV or -7kV, and a platform voltage of 0V.

[0075] (7) In this embodiment, the humidity sensor, microenvironment adjustment unit, high-voltage reactor and high-voltage power supply are connected through an electronic circuit board. In order to compare the influence of the polarity of the high-voltage discharge electrode on the amount of ozone and hydrogen peroxide produced by the device, the ambient humidity Hv and the threshold humidity Hv1 are set to 85%. The device is turned on, and the humidity sensor detects the current ambient humidity Hv. When the ambient humidity Hv ≤ the threshold humidity Hv1, the microenvironment adjuster is turned on. When the humidity reaches the threshold humidity Hv1, the high-voltage reactor is turned on.

[0076] (8) The concentrations of ozone and hydrogen peroxide produced under positive and negative high voltage pulse conditions are as follows Figure 5 As shown in Table 3 and Table 4:

[0077] Table 3 Ozone and hydrogen peroxide production under the condition of Hv=86.4% and high voltage power supply voltage of +7kV

[0078]

[0079] Table 4 Ozone and hydrogen peroxide production under the condition of Hv=86.7% and high voltage power supply voltage of -7kV

[0080]

[0081] like Figure 5 As shown in Tables 3 and 4, a positive high-voltage discharge electrode polarity is beneficial to increasing the amount of hydrogen peroxide produced by the device.

[0082] According to the above embodiment, this embodiment provides another specific example, and the parameters are set as follows:

[0083] (1) In this embodiment, the high-pressure reactor adopts a bipolar needle-plate reactor, wherein the needle electrode is the high-voltage electrode and the plate electrode is the reference electrode; wherein the needle-plate electrode is made of a stainless steel metal sheet and is 100 mm long; wherein the plate electrode is made of a stainless steel sheet with a thickness of 10 mm and a width of 50 mm; wherein the needle electrode has a needle tip length of 30 mm and a needle tip bottom width of 10 mm; wherein the number of needle tips on one side of the needle electrode is 18; wherein the interval between each needle tip is 20 mm; wherein in the embodiment, the needle electrode and the plate electrode are placed opposite each other, and the needle tip is 25 mm away from the plate electrode.

[0084] (2) In this embodiment, the electrodes are fixed by a plastic part, and the plastic part has multiple holes to allow water molecules in the air to enter the discharge space.

[0085] (3) In this embodiment, a fan is used to bring air with different humidity levels into the discharge space.

[0086] (4) In this embodiment, the humidity sensor uses a humidity sensing electronic module with a resolution of 0.1% and a response time of 1 s.

[0087] (5) In this embodiment, the microenvironment adjustment unit adopts a semiconductor condensation atomization module. After the semiconductor condenses and collects water, it is released into the high-energy discharge space through the atomization device.

[0088] (6) In this embodiment, the high voltage power supply adopts a high voltage pulse discharge power supply or a DC regulated power supply, wherein the pulse width of the high voltage pulse power supply is 1s, wherein the peak value of the high voltage pulse voltage or the DC voltage is +7kV respectively, wherein the platform voltage of the high voltage pulse power supply is 0V.

[0089] (7) In this embodiment, the humidity sensor, microenvironment adjustment unit, high-voltage reactor and high-voltage power supply are connected through an electronic circuit board. In order to compare the influence of the DC or pulse output mode of the high-voltage power supply on the amount of ozone and hydrogen peroxide produced by the device, the ambient humidity Hv and the threshold humidity Hv1 are set to 85%. The device is turned on, and the humidity sensor detects the current ambient humidity Hv. When the ambient humidity Hv ≤ the threshold humidity Hv1, the microenvironment adjuster is turned on. When the humidity reaches the threshold humidity Hv1, the high-voltage reactor is turned on.

[0090] (8) The concentrations of ozone and hydrogen peroxide produced under positive and negative high voltage pulse conditions are as follows Figure 6 As shown in Table 5 and Table 6:

[0091] Table 5 Ozone and hydrogen peroxide production under the condition of Hv=87.3%, pulse power supply for high voltage power supply, voltage of +7kV

[0092]

[0093] Table 6 Ozone and hydrogen peroxide production under the condition of Hv=87.3%, high voltage power supply using DC power supply, voltage +7kV

[0094]

[0095] like Figure 6 As shown in Tables 5 and 6, when the high voltage power supply is in pulse output mode, the amount of hydrogen peroxide produced by the device can be significantly increased.

[0096] According to the above embodiment, this embodiment provides another specific example, and the parameters are set as follows:

[0097] (1) In this embodiment, the high-pressure reactor adopts a bipolar needle-plate reactor, wherein the needle electrode is the high-voltage electrode and the plate electrode is the reference electrode; wherein the needle-plate electrode is made of a stainless steel metal sheet and is 100 mm long; wherein the plate electrode is made of a stainless steel sheet with a thickness of 10 mm and a width of 50 mm; wherein the needle electrode has a needle tip length of 30 mm and a needle tip bottom width of 10 mm; wherein the number of needle tips on one side of the needle electrode is 18; wherein the interval between each needle tip is 20 mm; wherein in the embodiment, the needle electrode and the plate electrode are placed opposite each other, and the needle tip is 25 mm away from the plate electrode.

[0098] (2) In this embodiment, the electrodes are fixed by a plastic part, and the plastic part has multiple holes to allow water molecules in the air to enter the discharge space.

[0099] (3) In this embodiment, a fan is used to bring air with different humidity levels into the discharge space.

[0100] (4) In this embodiment, the humidity sensor uses a humidity sensing electronic module with a resolution of 0.1% and a response time of 1 s.

[0101] (5) In this embodiment, the microenvironment adjustment unit adopts a semiconductor condensation atomization module. After the semiconductor condenses and collects water, it is released into the high-energy discharge space through the atomization device.

[0102] (6) In this embodiment, the high-voltage power supply adopts a high-voltage pulse discharge power supply, wherein the high-voltage pulse power supply has a pulse width of 1s, wherein the peak value of the high-voltage pulse voltage is adjusted to +4.5kV to +7kV, respectively, and the amount of hydrogen peroxide produced under different pulse high voltages is observed, wherein the platform voltage of the high-voltage pulse power supply is 0V.

[0103] (7) In this embodiment, the humidity sensor, microenvironment adjustment unit, high-voltage reactor and high-voltage power supply are connected through an electronic circuit board. In order to compare the effect of different high-voltage pulse voltages on the amount of hydrogen peroxide produced by the device, the ambient humidity Hv and the threshold humidity Hv1 are set to 85%. The device is turned on, and the humidity sensor detects the current ambient humidity Hv. When the ambient humidity Hv ≤ the threshold humidity Hv1, the microenvironment adjuster is turned on. When the humidity reaches the threshold humidity Hv1, the high-voltage reactor is turned on.

[0104] (8) The concentration of hydrogen peroxide produced under different high voltage pulse conditions is as follows Figure 7 As shown in Table 7:

[0105] Table 7 Hv = 85.8%, hydrogen peroxide production at different pulse peak voltages

[0106]

[0107]

[0108] like Figure 7As shown in Table 7, the higher the high-voltage pulse voltage, the higher the concentration of hydrogen peroxide produced by the device.

[0109] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for preparing hydrogen peroxide, characterized in that: The method comprises: Real-time detection of the ambient humidity of a target area, and adjustment of the ambient humidity to a preset value, wherein the target area is an air area within a preset range; When the ambient humidity reaches a preset value, the pulse discharge voltage is set to be lower than the spark discharge voltage and higher than the streamer discharge voltage, and a high-voltage discharge reaction is performed on the target area to produce high-concentration hydrogen peroxide.

2. The method according to claim 1, characterized in that The method further comprises: If the ambient humidity does not reach the preset value, the pulse discharge voltage is set lower than the streamer discharge voltage and higher than the ignition voltage, and a high-voltage discharge reaction is performed on the target area to produce trace ozone and charged ions.

3. The method according to claim 1, characterized in that The method further comprises: In the process of preparing high-concentration hydrogen peroxide, the concentration change rate of hydrogen peroxide and ozone is detected in real time; The pulse discharge voltage is adjusted according to a comparison result between the concentration change rate and a preset concentration change rate.

4. The method according to claim 1 or 2, characterized in that: The high-voltage discharge reaction on the target area comprises: The high-voltage discharge reaction is one of corona discharge and dielectric barrier discharge.

5. A device for preparing hydrogen peroxide, characterized in that: The device comprises: A high voltage reactor for emitting a pulse discharge voltage; Humidity sensor, used to obtain humidity data around the environment or the electric field of the high-voltage reactor; A microenvironment adjustment unit, used for adjusting the humidity around the electric field based on the humidity data; The controller is used to read the humidity data of the humidity sensor, control the microenvironment adjustment unit to adjust the humidity, and set the pulse discharge voltage of the high-voltage reactor.

6. The device according to claim 5, characterized in that The device also includes: A high voltage power supply is used to provide energy input to the high voltage reactor.

7. The device according to claim 5, characterized in that The device also includes: A gas concentration change detector is used to detect the concentration change rate of hydrogen peroxide and ozone in a target area.

8. The device according to claim 5, characterized in that The high pressure reactor also includes: The discharge electrode of the high-voltage reactor is a nano-carbon material, which is a low-resistance conductive adhesive material.

9. The device according to claim 5, characterized in that The microenvironment adjustment unit also includes: The microenvironment adjustment part is a semi-sealed box and a semiconductor refrigeration; The semiconductor condenser is integrated with the discharge electrode or the grounding electrode, and the electrode is coated with a water-absorbing material or at least one water-absorbing material is placed between the discharge fields.

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