Hydroxyl radical plasma generator

Abstract

The utility model discloses a hydroxyl radical plasma generator which comprises a water vapor storage tank, an oxygen storage tank and a gas mixing tank, a first communicating pipe is installed between the water vapor storage tank and the gas mixing tank in a communicating mode, and a second communicating pipe is installed between the oxygen storage tank and the gas mixing tank in a communicating mode. Gas in the oxygen storage tank and the water vapor storage tank enters the gas mixing tank through the second communicating pipe and the first communicating pipe to be mixed, then enters the reaction tank through the third communicating pipe and flows through the plasma reaction chamber composed of the columnar electrode, the aluminum oxide ceramic and the nozzle electrode. According to the present invention, the gas in the two storage tanks can be compressed by the automatic compression assembly along with the preparation of the hydroxyl plasma, such that the normal reaction can be ensured, and the hydroxyl plasma can be sprayed from the nozzle electrode so as to sterilize the external space.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of disinfection and purification, especially to a hydroxyl radical plasma generator. BACKGROUND

[0002] Hydroxyl radical (OH*) is a kind of extremely active and strong oxidizing free radical, and its standard electrode potential is as high as 2.80eV, only slightly lower than 2.87eV of fluorine. This characteristic makes hydroxyl radical show extremely high reaction rate constant when reacting with organic matter, usually in the range of 106~1010mol-1Ls-1, and almost no selectivity, which can oxidize almost all organic matter. The lifetime of hydroxyl radical is short, generally not more than 10-4 seconds, but its existence time in different environmental media is different. Using hydroxyl radical to treat organic matter not only has high treatment efficiency, but also will not produce secondary pollution, so it is regarded as an advanced and environment-friendly disinfection method. Hydroxyl radical disinfection technology is widely recognized by world life scientists as a clean and safe technology. Under sufficient concentration, the advanced oxidation process (AOP) of hydroxyl radical can effectively eliminate pathogenic microorganisms and volatile organic compounds (VOC) on large space and surface, kill pathogenic microorganisms, and degrade organic compounds in the air into minerals or harmless organic compounds.

[0003] Hydroxyl radical widely exists in nature, such as forest and atmosphere after rain, which is responsible for decomposing viruses, bacteria, methane, TVOC and other gases in the troposphere, and converting them into water and carbon dioxide. Hydroxyl radical is generated rapidly in the air, only 0.1 nanosecond, and the speed of decomposing microorganisms such as bacteria and viruses and chemical substances is extremely fast, usually within 1-10 seconds, and its disinfection efficiency is far higher than that of ozone, ultraviolet lamp, plasma and negative ion. Under the same concentration, the disinfection speed of hydroxyl radical is 1 million times that of ozone, and there is no harmful substance left after disinfection.

[0004] The preparation method of hydroxyl radical is quite complex, and the natural generation condition in nature is also quite harsh. Moreover, due to the extremely short lifetime of hydroxyl radical, it is almost impossible to effectively collect and store, so in actual application, it must rely on special equipment for real-time preparation to meet the immediate disinfection needs. However, the current hydroxyl radical preparation device has high technical difficulty and high cost, and its operation mainly depends on the chemical reaction between gases. These gases are usually stored in tank body as reactants for preparation process, and during the disinfection operation, as the gas in the tank body is continuously consumed, the gas pressure in the tank body will gradually decrease, and the gas concentration will also decrease, which not only directly affects the preparation efficiency and yield of hydroxyl radical, resulting in a big discount of disinfection effect, but also makes the gas preparation more difficult. UTILITY MODEL CONTENT

[0005] The utility model discloses a hydroxyl radical plasma generator to solve the above-mentioned insufficient place in prior art.

[0006] In order to realize above-mentioned purpose, the utility model discloses a hydroxyl radical plasma generator, including water vapor storage jar, oxygen storage jar and gas mixing groove, the water vapor storage jar with gas mixing groove between the communication installation has first communication pipe, the oxygen storage jar with gas mixing groove between the communication installation has second communication pipe, one end of gas mixing groove communicates and installs third communication pipe, the other end of third communication pipe communicates and is connected with the reaction tank, all be provided with solenoid valve on first communication pipe, second communication pipe and third communication pipe, the inner wall fixed mounting of reaction tank's both sides has the nozzle electrode, the inside fixed mounting of reaction tank has the columnar electrode, be provided with aluminium oxide ceramic between nozzle electrode and columnar electrode, the one end of reaction tank is set up gas injection port, the lateral wall fixed mounting of reaction tank has plasma high voltage power supply, the anode and cathode of plasma high voltage power supply are connected with columnar electrode and nozzle electrode respectively correspond, be provided with automatic compression subassembly on oxygen storage jar, water vapor storage jar and gas mixing groove.

[0007] As further description of the above technical solution: the water vapor storage jar's one side communicates and installs water pipe and water storage jar respectively, the water storage jar is linked together with water vapor storage jar through water pipe, the inside fixed mounting of water vapor storage jar has two electric heating pipes.

[0008] As further description of the above technical solution: the automatic compression subassembly includes two compression blocks of sliding installation in the inside of water vapor storage jar and oxygen storage jar, is set up two through grooves on the compression block of water vapor storage jar's inside fixed mounting, two electric heating pipes are connected with two through grooves slidingly, two compression blocks are fixedly installed with slide rod, two slide rods are fixedly installed with connecting plate between, two slide rods are set up with spring, one end of two springs is fixedly connected with connecting plate, the other end of two springs is fixedly connected with oxygen storage jar and water vapor storage jar respectively, the inside sliding installation of gas mixing groove has compression plate, the top of compression plate is fixedly installed with lifting frame, setting transmission assembly between lifting frame and connecting plate.

[0009] As further description of the above technical solution: the lateral wall of water vapor storage jar and oxygen storage jar is fixedly installed with sealing ring, and the sealing ring is sleeved on the slide rod.

[0010] As a further description of the above technical solutions: the transmission assembly comprises two support frames, a gear is rotatably installed between the two support frames, two first racks are fixedly installed at the bottom end of the connecting plate, the two first racks are in meshing engagement with the gear, and a second rack is fixedly installed on one side of the lifting frame and in meshing engagement with the gear.

[0011] As a further description of the above technical solutions: the inner wall of the water vapor storage tank is provided with a heat preservation layer.

[0012] As a further description of the above technical solutions: the water storage tank, the water vapor storage tank, the oxygen storage tank and the gas mixing tank are fixedly connected with support plates.

[0013] As a further description of the above technical solutions: the first communication pipe and the second communication pipe are respectively provided with a first one-way valve and a second one-way valve.

[0014] The utility model provides a kind of hydroxyl radical plasma generator. With following beneficial effect: gas in oxygen storage tank and water vapor storage tank respectively through second communication pipe and first communication pipe enters the inside mixing of gas mixing tank, then through third communication pipe enters the inside of reaction tank, flows through by column electrode, alumina ceramic and nozzle electrode component plasma reaction chamber, produces complex chemical reaction, finally from nozzle electrode spouts hydroxyl radical plasma, disinfects outside space by hydroxyl radical plasma, and with the preparation of hydroxyl radical plasma, automatic compression component can compress the gas in the inside of two storage tanks, to ensure normal reaction.

[0015] It should be understood that the preceding general description and the following detailed description are merely exemplary and explanatory, rather than restrictive, of the present disclosure.

[0016] The present application provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole three-dimensional structure schematic diagram of the hydroxyl radical plasma generator of the utility model;

[0018] Figure 2 It is a three-dimensional structure schematic diagram of another perspective of the utility model;

[0019] Figure 3 It is a top view structure schematic diagram of the utility model;

[0020] Figure 4 It is a sectional view structure schematic diagram of the utility model;

[0021] Figure 5 It is the inside three-dimensional structure schematic view of the water vapor storage tank and the oxygen storage tank of the utility model;

[0022] Figure 6 It is the inside three-dimensional explosion structure schematic view of the gas mixing tank of the utility model;

[0023] Figure 7 It is the section structure schematic view of the utility model for setting the heat preservation layer on the surface of the water vapor storage tank.

[0024] Legend:

[0025] 1, water storage tank; 2, water vapor storage tank; 3, oxygen storage tank; 4, gas mixing tank; 5, reaction tank; 6, plasma high voltage power supply; 7, support plate; 8, water delivery pipe; 9, first communication pipe; 10, second communication pipe; 11, third communication pipe; 12, electromagnetic valve; 13, electric heating pipe; 14, compression block; 15, through groove; 16, slide bar; 17, spring; 18, sealing ring; 19, connecting plate; 20, first rack; 21, gear; 22, support frame; 23, second rack; 24, lifting frame; 25, compression plate; 26, second check valve; 27, first check valve; 28, nozzle electrode; 29, columnar electrode; 30, alumina ceramic; 31, gas outlet; 32, heat preservation layer. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0027] Reference Figures 1-7The application relates to a hydroxyl radical plasma generator, which comprises a water vapor storage tank 2, an oxygen storage tank 3 and a gas mixing groove 4, a first communicating pipe 9 is arranged in communication between the water vapor storage tank 2 and the gas mixing groove 4, a second communicating pipe 10 is arranged in communication between the oxygen storage tank 3 and the gas mixing groove 4, a third communicating pipe 11 is arranged in communication at one end of the gas mixing groove 4, a reaction groove 5 is connected in communication at the other end of the third communicating pipe 11, electromagnetic valves 12 are arranged on the first communicating pipe 9, the second communicating pipe 10 and the third communicating pipe 11, nozzle electrodes 28 are fixedly arranged on the inner walls of the two sides of the reaction groove 5, a cylindrical electrode 29 is fixedly arranged in the reaction groove 5, an alumina ceramic 30 is arranged between the nozzle electrodes 28 and the cylindrical electrode 29, a gas spraying outlet 31 is arranged at one end of the reaction groove 5, a plasma high-voltage power supply 6 is fixedly arranged on the side wall of the reaction groove 5, the positive electrode and the negative electrode of the plasma high-voltage power supply 6 are connected with the cylindrical electrode 29 and the nozzle electrodes 28 respectively, and automatic compression assemblies are arranged on the oxygen storage tank 3, the water vapor storage tank 2 and the gas mixing groove 4; the gases in the oxygen storage tank 3 and the water vapor storage tank 2 enter the inside of the gas mixing groove 4 through the second communicating pipe 10 and the first communicating pipe 9 respectively, are mixed, then enter the inside of the reaction groove 5 through the third communicating pipe 11, flow through a plasma reaction chamber composed of the cylindrical electrode 29, the alumina ceramic 30 and the nozzle electrodes 28, generate complex chemical reactions, finally spray out hydroxyl plasma from the nozzle electrodes 28, disinfect the external space through the hydroxyl plasma, and along with the preparation of the hydroxyl plasma, the automatic compression assemblies can compress the gases in the two storage tanks, so that normal reactions can be ensured.

[0028] The complex chemical reaction process involved in the reaction of the above reaction groove 5 is as follows:

[0029] Under normal temperature and pressure, O2 and H2O molecules in the gas are processed into OH* and eaq- free radicals by using a strong electric field ionization discharge method.

[0030] The process of generating plasma mainly by ionizing O2 gas molecules is as follows:

[0031] O2 + e -> O2+ + 2e (1)

[0032] Under the action of a strong electric field, O2+ can form a hydrated ion with H2O molecules, and the reaction formula is as follows:

[0033] O2+ + H2O + M -> O2+(H2O) + M (2)

[0034] The main way of generating OH* by ionizing O2 is the decomposition reaction of the hydrated ion, and the reaction formula is as follows:

[0035] O2 + (H2O) + H2O → H3O+ + O2 + OH* (3)

[0036] O2 + (H2O) + H2O → H3O+ + O2 + OH* (3)

[0037] H3O+ + H2O → H3O+ + H2O + OH* (5)

[0038] The ionization, excitation reaction of H2O molecule produces OH*:

[0039] 2H2O + e → H2O+ + H2O* + 2e (6)

[0040] The excited state H2O* molecule decomposes:

[0041] H2O* → H* + OH* (7)

[0042] H2O+ decomposes:

[0043] H2O+ + H2O → H3O+ + OH* (8)

[0044] The above complex chemical reactions require a strong electric field to ionize O2 and H2O in the DBD plasma reaction chamber, i.e. the alumina ceramic 30, which generates a strong electric field to ionize O2 and H2O. The strength of this electric field needs to have the following requirements:

[0045] The ionization energy of O2 and H2O is 12.5 eV and 12.6 eV respectively. The energy distribution of electrons in the electric field is distributed according to Maxwell's law. Only when the average energy of electrons obtained from the electric field is greater than 12 eV, most of the O2 and H2O molecules can be ionized, and high concentration of hydroxyl radicals can be processed at the molecular level. The amount of energy obtained by electrons from the applied electric field is a function of the square of the electric field strength value. When the applied electric field strength E / n reaches 400Td (E is the discharge electric field strength, n is the gas concentration, 1Td=10-17V*cm2), the average energy obtained by electrons from the applied excitation electric field reaches 13eV. Therefore, when the discharge electric field strength of the plasma reaction chamber reaches 400Td, O2 and H2O can be directly converted into hydroxyl radicals at the molecular level.

[0046] As the preferred technical scheme of the embodiment, one side of the water vapor storage tank 2 is respectively communicated with a water delivery pipe 8 and a water storage tank 1, the water storage tank 1 is communicated with the water vapor storage tank 2 through the water delivery pipe 8, and two electric heating pipes 13 are fixedly installed in the water vapor storage tank 2.

[0047] As the preferred technical scheme of the embodiment, the automatic compression assembly includes two compression blocks 14 slidingly installed in the water vapor storage tank 2 and the oxygen storage tank 3, two through grooves 15 are formed in the compression block 14 installed in the water vapor storage tank 2, the two electric heating pipes 13 are slidingly connected with the two through grooves 15, two sliding rods 16 are fixedly installed on the two compression blocks 14, a connecting plate 19 is fixedly installed between the two sliding rods 16, springs 17 are sleeved on the two sliding rods 16, one end of each spring 17 is fixedly connected with the connecting plate 19, and the other end of each spring 17 is fixedly connected with the oxygen storage tank 3 and the water vapor storage tank 2, respectively, a compression plate 25 is slidingly installed in the gas mixing tank 4, a lifting frame 24 is fixedly installed at the top end of the compression plate 25, and a transmission assembly is arranged between the lifting frame 24 and the connecting plate 19; when the gas in the water vapor storage tank 2 and the oxygen storage tank 3 decreases, the concentration and the pressure decrease, and under the action of the springs 17, the compression blocks 14 in the water vapor storage tank 2 and the oxygen storage tank 3 are pushed, so that the gas is compressed, the normal gas concentration is ensured, the gas can smoothly flow into the gas mixing tank 4, and under the action of the transmission assembly, the mixed gas in the gas mixing tank 4 can be further compressed, so that after the electromagnetic valve 12 of the third communication pipe 11 is opened, the mixed gas can smoothly enter the reaction tank 5 for reaction.

[0048] As the preferred technical scheme of the embodiment, the side walls of the water vapor storage tank 2 and the oxygen storage tank 3 are fixedly installed with sealing rings 18, and the sealing rings 18 are sleeved on the sliding rods 16; the sealing rings 18 can improve the sealing performance of the tank body and prevent gas leakage.

[0049] As the preferred technical scheme of the embodiment, the transmission assembly comprises two support frames 22, the gear 21 is rotatably installed between the two support frames 22, the bottom end of the connecting plate 19 is fixedly installed with two first racks 20, the two first racks 20 are in mesh with the gear 21, the second rack 23 is fixedly installed on one side of the lifting frame 24, and the second rack 23 is in mesh with the gear 21; when the connecting plate 19 moves towards the direction of the tank body and drives the first rack 20 to move, the first rack 20 drives the gear 21 to rotate, the rotation of the gear 21 further drives the second rack 23 to descend, so that the lifting frame 24 moves downwards, and thus the compression plate 25 can compress the mixed gas in the mixed gas tank.

[0050] As the preferred technical scheme of the embodiment, the inner wall of the water vapor storage tank 2 is provided with a heat preservation layer 32; since the temperature of the water vapor needs to be kept at a high temperature, the heat preservation layer 32 in the water vapor storage tank 2 can ensure that the water vapor in the water vapor storage tank 2 will not be liquefied into water.

[0051] As the preferred technical scheme of the embodiment, the water storage tank 1, the water vapor storage tank 2, the oxygen storage tank 3 and the gas mixing tank 4 are fixedly connected with the support plate 7; the support plate 7 can fixedly connect the tank body and the tank body, and increase the stability of the device.

[0052] As the preferred technical scheme of the embodiment, the first communication pipe 9 and the second communication pipe 10 are respectively provided with the first one-way valve 27 and the second one-way valve 26; the first one-way valve 27 and the second one-way valve 26 are arranged to ensure that the oxygen and the water vapor can only enter the inside of the gas mixing tank 4 from the respective storage tanks, and the gas backflow cannot occur.

[0053] The above is only a preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any person skilled in the art in the technical range disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, equivalent replacement or change, should be covered in the protection scope of the utility model.

Claims

1. A hydroxyl radical plasma generator comprising a water vapor storage tank (2), an oxygen gas storage tank (3), and a gas mixing tank (4), characterized by, The first communication pipe (9) is installed in communication between the water vapor storage tank (2) and the gas mixing tank (4), the second communication pipe (10) is installed in communication between the oxygen storage tank (3) and the gas mixing tank (4), one end of the gas mixing tank (4) is communicated and installed with the third communication pipe (11), the other end of the third communication pipe (11) is communicated and connected with the reaction tank (5), the electromagnetic valve (12) is arranged on the first communication pipe (9), the second communication pipe (10) and the third communication pipe (11), the nozzle electrode (28) is fixedly installed on the inner wall of the two sides of the reaction tank (5), the columnar electrode (29) is fixedly installed in the reaction tank (5), the alumina ceramic (30) is arranged between the nozzle electrode (28) and the columnar electrode (29), the gas injection port (31) is formed in one end of the reaction tank (5), the plasma high-voltage power supply (6) is fixedly installed on the side wall of the reaction tank (5), the positive electrode and the negative electrode of the plasma high-voltage power supply (6) are respectively connected with the columnar electrode (29) and the nozzle electrode (28) in correspondence, and the automatic compression assembly is arranged on the oxygen storage tank (3), the water vapor storage tank (2) and the gas mixing tank (4).

2. A hydroxyl radical plasma generator according to claim 1, wherein The water vapor storage tank (2) is communicated and installed with the water delivery pipe (8) and the water storage tank (1) on one side, the water storage tank (1) is communicated with the water vapor storage tank (2) through the water delivery pipe (8), and the two electric heating pipes (13) are fixedly installed in the water vapor storage tank (2).

3. A hydroxyl radical plasma generator according to claim 2, wherein The automatic compression assembly comprises two compression blocks (14) slidingly installed in the water vapor storage tank (2) and the oxygen storage tank (3), two through grooves (15) are formed in the compression block (14) arranged in the water vapor storage tank (2), the two electric heating pipes (13) are slidingly connected with the two through grooves (15), the two compression blocks (14) are fixedly installed with the slide rods (16), the connecting plate (19) is fixedly installed between the two slide rods (16), the springs (17) are sleeved on the two slide rods (16), one end of the two springs (17) is fixedly connected with the connecting plate (19), the other end of the two springs (17) is fixedly connected with the oxygen storage tank (3) and the water vapor storage tank (2) respectively, the compression plate (25) is slidingly installed in the gas mixing tank (4), the lifting frame (24) is fixedly installed at the top end of the compression plate (25), and the transmission assembly is arranged between the lifting frame (24) and the connecting plate (19).

4. A hydroxyl radical plasma generator according to claim 1, wherein The sealing rings (18) are fixedly installed on the side walls of the water vapor storage tank (2) and the oxygen storage tank (3), and the sealing rings (18) are sleeved on the slide rods (16).

5. A hydroxyl radical plasma generator according to claim 3, wherein The transmission assembly comprises two supporting frames (22), a gear (21) is rotatably installed between the two supporting frames (22), the bottom end of the connecting plate (19) is fixedly installed with two first racks (20), the two first racks (20) are meshed with the gear (21), and one side of the lifting frame (24) is fixedly installed with a second rack (23); the second rack (23) is meshed with the gear (21).

6. A hydroxyl radical plasma generator according to claim 1, wherein The inner wall of the water vapor storage tank (2) is provided with a heat preservation layer (32).

7. A hydroxyl radical plasma generator according to claim 2, wherein The water storage tank (1), the water vapor storage tank (2), the oxygen storage tank (3) and the gas mixing tank (4) are fixedly connected with supporting plates (7).

8. A hydroxyl radical plasma generator according to claim 1, wherein The first communicating pipe (9) and the second communicating pipe (10) are respectively provided with first one-way valves (27) and second one-way valves (26) in the pipes.

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