Plasma gas-liquid reactor

Abstract

The utility model relates to a plasma gas-liquid reactor which comprises an inner tubular column, an outer sleeve, a high-voltage electrode, a grounding electrode, an aeration stone, an upper end cover and a sealing end cover, a first cavity is defined by the upper end cover, the inner tubular column, the outer sleeve and the grounding electrode, a liquid inlet pipe and an exhaust pipe are arranged on the side wall of the upper end of the first cavity, and a liquid discharge pipe is arranged on the side wall of the lower end of the first cavity. The lower end of the inner tubular column is located in the first cavity, the aeration stone is in sealed connection with the lower end of the inner tubular column, a second cavity is defined by the sealing end cover, the inner tubular column and the aeration stone or the sealing end cover, the inner tubular column, the aeration stone and the upper end cover, and the lower end of the high-voltage electrode is inserted into the second cavity; an air inlet pipe is arranged on the side wall of the upper end part of the second chamber; under the action of the aeration stone, the plasma gas forms bubbles in the liquid in the first chamber, so that the contact area of the plasma and the liquid is enlarged, the reaction efficiency of the liquid-phase plasma is improved, and the reaction efficiency between part of the gas and the liquid is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of reaction devices, and in particular relates to a plasma gas-liquid reactor. Background Art

[0002] Plasma technology is a commonly used technology in modern chemical engineering, mainly used to obtain plasma. Plasma is a gas that obtains enough energy from the outside world through discharge or heating, so that the electrons bound by orbits in gas molecules or atoms become free electrons, forming plasma. In the chemical industry, plasma technology has been applied to the reaction between gas and liquid, so that gases and liquids that cannot react under normal conditions react with each other; for example, the preparation of ammonia. In order to improve the reaction efficiency between some gases and liquids (such as the reaction between nitrogen and water), it is urgent to develop a plasma gas-liquid reactor. Utility Model Content

[0003] In order to improve the reaction efficiency between some gases and liquids (such as the reaction between nitrogen and water), the utility model provides a plasma gas-liquid reactor. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0004] A plasma gas-liquid reactor, comprising an inner pipe column, an outer sleeve, a high-voltage electrode, a grounding electrode, an aeration stone, an upper end cover and a sealing end cover; the inner pipe column and the outer sleeve are coaxially arranged, the lower end of the outer sleeve is sealed and connected to the grounding electrode, the upper end cover is sleeved on the outer side wall of the inner pipe column, and is used to block the gap between the inner pipe column and the outer sleeve; the upper end cover, the inner pipe column, the outer sleeve and the grounding electrode are enclosed to form a first chamber, and a liquid inlet pipe is arranged on the side wall of the upper end of the first chamber and an exhaust pipe, a drain pipe is arranged on the side wall of the lower end of the first chamber; the lower end of the inner pipe column is located in the first chamber, the aeration stone is sealed and connected to the lower end of the inner pipe column, the sealed end cover is used to seal the upper end of the inner pipe column, the sealed end cover, the inner pipe column and the aeration stone or the sealed end cover, the inner pipe column, the aeration stone and the upper end cover together form a second chamber, the lower end of the high-voltage electrode is inserted in the second chamber; an air inlet pipe is arranged on the side wall of the upper end of the second chamber.

[0005] The beneficial effects of the plasma gas-liquid reactor of the utility model are as follows: a high-intensity electric field is formed between the high-voltage electrode and the ground electrode, so that the liquid in the first chamber and the gas current in the second chamber are in a plasma state, the gas pressure in the second chamber is higher than the liquid pressure in the first chamber, and under the action of the aeration stone, the plasma gas forms bubbles in the liquid in the first chamber, thereby expanding the contact area between the plasma and the liquid, improving the efficiency of the liquid-phase plasma reaction, and thus improving the reaction efficiency between some gases and liquids (such as: the reaction between nitrogen and water).

[0006] Furthermore, the plasma gas-liquid reactor also includes a protective sleeve; the high-voltage electrode is an anode rod, the lower end of the anode rod is inserted into the second chamber, and the protective sleeve is sleeved on the outer surface of the high-voltage electrode inserted into the second chamber.

[0007] Beneficial effects: The protective sleeve is a ceramic dielectric sleeve, which is used to block the high-voltage electrode from direct contact with the gas, reduce the corrosion of the high-voltage electrode, increase the service life of the high-voltage electrode, and prevent the impact on the electric field caused by corrosion or gas adhesion.

[0008] Furthermore, the grounding electrode includes a sealing cover plate and an electrode plate, wherein the sealing cover plate is used to seal the lower end of the outer sleeve, and the electrode plate is embedded in the inner surface of the sealing cover plate and is in direct contact with the first chamber.

[0009] Beneficial effect: The sealing cover plate is used to seal the lower end of the outer sleeve to form a first chamber. The electrode plate is in direct contact with the liquid in the first chamber, which is beneficial to improving the ionization of the liquid and further improving the reaction efficiency between the gas and the liquid.

[0010] Furthermore, the aeration stone is a cylindrical aeration stone, and a cylindrical groove is opened on the upper end surface of the cylindrical aeration stone. The cylindrical groove is used for inserting the lower end of the high-voltage electrode, and a gap is maintained between the high-voltage electrode and the inner bottom surface of the cylindrical groove.

[0011] Beneficial effect: The aeration stone is set as a cylindrical aeration stone, which increases the contact area between the aeration stone and the liquid while ensuring that the air pressure in the second chamber does not change abruptly, which is beneficial to improving the reaction effect; a gap is maintained between the high-voltage electrode and the bottom surface of the cylindrical groove to prevent interference between the high-voltage electrode and the aeration stone during installation.

[0012] Furthermore, the cylindrical aeration stone is foam ceramic, and a first annular notch is provided at the upper end of the foam ceramic, and the lower end of the inner pipe column is inserted into the first annular notch, and an interference fit is formed during insertion.

[0013] Beneficial effects: The honeycomb-like holes in the foam ceramic are conducive to gas diffusion and the formation of fine bubbles, which is conducive to increasing the contact area between bubbles and liquid; the interference fit improves the connection strength between the aeration stone and the inner pipe column, and increases the service life.

[0014] Furthermore, an external thread is provided on the side wall of the inner pipe column, and an internal thread is provided in the upper end cover, and the upper end cover is sleeved on the inner pipe column through the cooperation of the internal thread and the external thread.

[0015] Beneficial effect: The upper end cover is stably fixed on the inner pipe column by adopting threaded connection.

[0016] Furthermore, a second annular notch is provided on the circumferential side surface of the upper end portion of the inner pipe column, the external thread is provided in the second annular notch, and when the upper end cover is sleeved on the inner pipe column, sealing rings are respectively provided at the bottom of the second annular notch and the upper end surface of the outer sleeve.

[0017] Beneficial effect: By arranging sealing rings at the bottom of the second annular notch and the upper end surface of the outer sleeve respectively, the sealing performance between the upper end cover and the inner pipe column and the outer sleeve is improved, thereby preventing the escape of the reacted gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the plasma gas-liquid reactor of the utility model;

[0019] Figure 2 yes Figure 1 A cross-sectional view of

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 It is a partial three-dimensional structural schematic diagram of an embodiment of the plasma gas-liquid reactor of the utility model.

[0022] Numbers in the figure: 1-inner pipe column, 2-outer casing, 3-high voltage electrode, 4-grounding electrode, 41-sealing cover plate, 42-electrode plate, 5-aeration stone, 6-upper end cover, 7-sealing end cover, 8-first chamber, 9-second chamber, 10-first sealing ring, 11-second sealing ring, 12-liquid inlet pipe, 13-exhaust pipe, 14-inlet pipe, 15-liquid discharge pipe, 16-protective sleeve, 17-second annular notch. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0024] The specific structure of the embodiment of the utility model plasma gas-liquid reactor is as follows Figure 1 and Figure 2 As shown, it includes an inner pipe column 1, an outer casing 2, a high-voltage electrode 3, a grounding electrode 4, an aeration stone 5, an upper end cap 6 and a sealing end cap 7; the upper end cap 6, the inner pipe column 1, the outer casing 2 and the grounding electrode 4 enclose a first chamber 8, and the sealing end cap 7, the inner pipe column 1, the aeration stone 5 and the upper end cap 6 enclose a second chamber 9. In other embodiments, the sealing end cap, the inner pipe column and the aeration stone are directly enclosed to form the second chamber, instead of the design in which the sealing end cap, the inner pipe column, the aeration stone and the upper end cap are enclosed to form the second chamber 9.

[0025] like Figure 2As shown, the inner pipe column 1 is coaxially arranged with the outer sleeve 2, and the lower end of the outer sleeve 2 is sealed and connected with the grounding electrode 4. In this embodiment, the grounding electrode 4 includes a blocking cover plate 41 and an electrode plate 42. The blocking cover plate 41 is used to block the lower end of the outer sleeve 2 to form a first chamber 8. The electrode plate 42 is embedded in the inner surface of the blocking cover plate 41 and is in direct contact with the first chamber 8; it is beneficial to improve the ionization of the liquid and further improve the reaction efficiency between the gas and the liquid. In other embodiments, the grounding electrode is an integral electrode plate, which is directly blocked at the lower end of the outer sleeve by reasonably designing the structure of the electrode plate.

[0026] like Figure 2 , Figure 3 and Figure 4 As shown, the upper end cap 6 is sleeved on the outer wall of the inner pipe column 1 to block the gap between the inner pipe column 1 and the outer sleeve 2. In this embodiment, an external thread is provided on the side wall of the inner pipe column 1, and an internal thread is provided in the upper end cap 6. The upper end cap 6 is sleeved on the inner pipe column 1 by the cooperation of the internal thread and the external thread. A second annular notch 17 is provided on the circumferential side surface of the upper end of the inner pipe column 1, and the external thread is provided in the second annular notch 17. When the upper end cap 6 is sleeved on the inner pipe column 1, a sealing ring is provided at the bottom of the second annular notch 17 and the upper end surface of the outer sleeve 2, respectively, which are a first sealing ring 10 and a second sealing ring 11; by providing sealing rings at the bottom of the second annular notch 17 and the upper end surface of the outer sleeve 2, respectively, the sealing between the upper end cap 6 and the inner pipe column 1 and the outer sleeve 2 is improved to prevent the escape of the gas after the reaction. In other embodiments, the upper end cap is sleeved on the inner pipe column, and the upper end cap and the side wall are sealed by adhesive bonding.

[0027] An inlet pipe 12 and an exhaust pipe 13 are arranged on the side wall of the upper end of the first chamber 8, and a drain pipe 15 is arranged on the side wall of the lower end of the first chamber 8; one end of the inlet pipe 12, the exhaust pipe 13 and the drain pipe 15 is fixed to the corresponding position of the side wall of the outer sleeve 2.

[0028] like Figure 2 As shown, the lower end of the inner pipe column 1 is located in the first chamber 8, the aeration stone 5 is sealed and connected to the lower end of the inner pipe column 1, and the sealing end cover 7 is used to block the upper end of the inner pipe column 1; an air intake pipe 14 is arranged on the side wall of the upper end of the second chamber 9. In this embodiment, the air intake pipe 14 is arranged on the upper end cover 6, and one end of the air intake pipe 14 is plugged and fixed on the side wall of the upper end cover 6 and communicated with the second chamber 9; in other embodiments, a threaded through hole is opened at the corresponding position of the side wall of the inner pipe column, and one end of the air intake pipe is inserted into the threaded through hole and sealed with a sealant; interference between the upper end cover and the air intake pipe during installation is eliminated.

[0029] The lower end of the high-voltage electrode 3 is inserted in the second chamber 9; the plasma gas-liquid reactor also includes a protective sleeve 16; the high-voltage electrode 3 is an anode rod, the lower end of the anode rod is inserted in the second chamber 9, and the protective sleeve 16 is sleeved on the outer surface of the high-voltage electrode 3 inserted into the second chamber 9; the protective sleeve 16 is a ceramic dielectric sleeve, which is used to prevent the high-voltage electrode 3 from directly contacting the gas, reduce the corrosion of the high-voltage electrode 3, and improve the service life of the high-voltage electrode 3. At the same time, prevent the influence of corrosion or gas adhesion on the electric field. In other embodiments, under the premise of not considering corrosion and service life, the protective sleeve may not be sleeved on the surface of the high-voltage electrode.

[0030] like Figure 2 As shown, in this embodiment, the aeration stone 5 is a cylindrical aeration stone 5. While ensuring that the air pressure in the second chamber 9 does not change abruptly, the contact area between the aeration stone 5 and the liquid is increased, which is beneficial to improving the reaction effect. A cylindrical groove is provided on the upper end surface of the cylindrical aeration stone 5, and the cylindrical groove is provided for the lower end of the high-voltage electrode 3 to be inserted. The high-voltage electrode 3 maintains a gap with the inner bottom surface of the cylindrical groove; the high-voltage electrode 3 maintains a gap with the inner bottom surface of the cylindrical groove to prevent the high-voltage electrode 3 from interfering with the aeration stone 5 during installation. The cylindrical aeration stone 5 is a foam ceramic, and there are honeycomb holes in the foam ceramic, which is beneficial to gas diffusion and the formation of fine bubbles, and is beneficial to increasing the contact area between the bubbles and the liquid. A first annular notch is provided on the upper end of the foam ceramic, and the first annular notch is provided for the lower end of the inner pipe column 1 to be inserted, and the insertion is interference fit; the connection strength between the aeration stone 5 and the inner pipe column 1 is improved, and the service life is improved. In other embodiments, under the premise that the connection between the aeration stone and the inner pipe column is not affected, the shape of the aeration stone is a disc or other shapes instead of a cylinder.

[0031] When in use, the reaction gas and liquid flow into the first chamber 8 and the second chamber 9 respectively through the air inlet pipe 14 or the liquid inlet pipe 12; a high-intensity electric field is formed between the high-voltage electrode 3 and the ground electrode 4, so that the liquid in the first chamber 8 and the gas current in the second chamber 9 are in a plasma state, and the gas pressure in the second chamber 9 is higher than the liquid pressure in the first chamber 8. Under the action of the aeration stone 5, the plasma gas forms bubbles in the liquid in the first chamber 8; the gas in the bubble is in a plasma state and contacts with the liquid to complete the reaction. Under the action of the aeration stone 5, the plasma gas forms bubbles in the liquid in the first chamber 8, thereby expanding the contact area between the plasma and the liquid, improving the efficiency of the liquid-phase plasma reaction, and thus improving the reaction efficiency between some gases and liquids (such as: the reaction between nitrogen and water).

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A plasma gas-liquid reactor, characterized in that: The utility model comprises an inner pipe column, an outer sleeve, a high-voltage electrode, a grounding electrode, an aeration stone, an upper end cover and a sealing end cover; the inner pipe column is coaxially arranged with the outer sleeve, the lower end of the outer sleeve is sealed and connected with the grounding electrode, and the upper end cover is sleeved on the outer side wall of the inner pipe column to block the gap between the inner pipe column and the outer sleeve; the upper end cover, the inner pipe column, the outer sleeve and the grounding electrode are enclosed to form a first chamber, a liquid inlet pipe and an exhaust pipe are arranged on the side wall of the upper end of the first chamber, and a liquid discharge pipe is arranged on the side wall of the lower end of the first chamber; the lower end of the inner pipe column is located in the first chamber, the aeration stone is sealed and connected with the lower end of the inner pipe column, and the sealing end cover is used to block the upper end of the inner pipe column, the sealing end cover, the inner pipe column and the aeration stone or the sealing end cover, the inner pipe column, the aeration stone and the upper end cover are enclosed to form a second chamber, and the lower end of the high-voltage electrode is inserted in the second chamber; an air inlet pipe is arranged on the side wall of the upper end of the second chamber.

2. The plasma gas-liquid reactor according to claim 1, characterized in that: The plasma gas-liquid reactor also includes a protective sleeve; the high-voltage electrode is an anode rod, the lower end of the anode rod is inserted into the second chamber, and the protective sleeve is sleeved on the outer surface of the high-voltage electrode inserted into the second chamber.

3. The plasma gas-liquid reactor according to claim 2, characterized in that: The grounding electrode includes a sealing cover plate and an electrode plate. The sealing cover plate is used to seal the lower end of the outer sleeve. The electrode plate is embedded in the inner surface of the sealing cover plate and is in direct contact with the first chamber.

4. The plasma gas-liquid reactor according to claim 1, 2 or 3, characterized in that: The aeration stone is a cylindrical aeration stone, and a cylindrical groove is provided on the upper end surface of the cylindrical aeration stone. The cylindrical groove is used for inserting the lower end of the high-voltage electrode, and a gap is maintained between the high-voltage electrode and the inner bottom surface of the cylindrical groove.

5. The plasma gas-liquid reactor according to claim 4, characterized in that: The cylindrical aeration stone is foam ceramic, and a first annular notch is provided at the upper end of the foam ceramic. The lower end of the inner pipe column is inserted into the first annular notch, and an interference fit is achieved during insertion.

6. The plasma gas-liquid reactor according to claim 4, characterized in that: An external thread is arranged on the side wall of the inner pipe column, and an internal thread is arranged in the upper end cover. The upper end cover is sleeved on the inner pipe column through the cooperation of the internal thread and the external thread.

7. The plasma gas-liquid reactor according to claim 6, characterized in that: A second annular notch is provided on the circumferential side surface of the upper end of the inner pipe column, and the external thread is provided in the second annular notch. When the upper end cover is sleeved on the inner pipe column, sealing rings are respectively provided at the bottom of the second annular notch and the upper end surface of the outer sleeve.

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