A sliding arc plasma torch

Abstract

The present invention discloses a sliding arc plasma torch, comprising a fixed flange, an air inlet pipe and a bent tube electrode, wherein: the air inlet pipe is vertically installed on the fixed flange, and the air outlet of the air inlet pipe extends to the lower end surface of the fixed flange; three bent tube electrodes are provided, and the three bent tube electrodes are circumferentially evenly distributed on the fixed flange with the intersection of the axis of the air inlet pipe and the upper end surface of the fixed flange as the center of the circle. In the sliding arc plasma torch proposed by the present invention, the arc generated between the bent tube electrodes is blown to a position away from the fixed flange by the gas introduced by the central air inlet pipe until it reaches the top of the electrode and breaks the arc, and the arc is regenerated at the nearest part of the electrode, thereby forming a continuous sliding arc between the bent tube electrode groups, thereby extending the service life of the electrode.

Description

Technical Field

[0001] The invention relates to the technical field of plasma torches, and in particular to a sliding arc plasma torch for high-temperature vaporization treatment. Background Art

[0002] High-concentration organic waste liquids, such as aquaculture wastewater, waste mineral oil, waste solvents from laboratories or factories, chemical dyes, etc., have high organic content, complex composition, and high particulate matter content. If they are directly discharged into the environment, they will seriously affect the ecological environment and human health. The existing treatment process has the disadvantages of large investment, long cycle, and complex process. Plasma can quickly generate a high-temperature, high-energy density environment, and has great advantages in harmless and resource-based treatment of high-concentration organic waste liquids. Summary of the invention

[0003] In order to solve the technical problems existing in the background technology, the present invention provides a sliding arc plasma torch.

[0004] The present invention provides a sliding arc plasma torch, comprising a fixed flange, an air inlet pipe and a bent tube electrode, wherein:

[0005] The air inlet pipe is vertically mounted on the fixed flange, and the air outlet of the air inlet pipe extends to the lower end surface of the fixed flange;

[0006] There are three bent pipe electrodes, and the three bent pipe electrodes are evenly distributed on the fixed flange in the circumferential direction with the intersection of the axis of the intake pipe and the upper end surface of the fixed flange as the center of the circle;

[0007] The bent tube electrode includes a vertical portion, a curved portion and an inclined portion, the curved portion is located between the vertical portion and the inclined portion, the vertical portion is vertically mounted on the fixed flange, the curved portion and the inclined portion are located at the lower end of the fixed flange, the inclined portion gradually deviates from top to bottom in the direction away from the axis of the fixed flange, and the curved portions of the three bent tube electrodes are close to each other, that is, the curved portions protrude toward the direction close to the axis of the fixed flange.

[0008] As a further optimized solution of the present invention, a circulating water cavity is provided in the curved tube electrode, and a water inlet and a water outlet are provided on the curved tube electrode, and both the water inlet and the water outlet are connected to the circulating water cavity.

[0009] As a further optimized solution of the present invention, the water inlet and the water outlet are both arranged in the upper part of the curved tube electrode.

[0010] As a further optimized solution of the present invention, the bent tube electrode includes an outer tube and an inner tube, the inner tube is sleeved inside the outer tube, a guide cavity is formed between the outer tube and the inner tube, and the guide cavity is connected with the inner tube to form a circulating water cavity.

[0011] As a further optimized solution of the present invention, the lower end of the outer tube is sealed, the inner tube is a structure with both ends open, and a guide channel is formed between the lower end surface of the inner tube and the lower end of the outer tube.

[0012] As a further optimized solution of the present invention, a water outlet is opened on the side wall of the outer tube, the upper end surface of the inner tube is the water inlet, and the upper end surface of the inner tube extends out of the outer tube.

[0013] As a further optimized solution of the present invention, an insulating member is provided between the bent tube electrode and the fixed flange, and the insulating member is sleeved on the bent tube electrode.

[0014] As a further optimized solution of the present invention, the insulating member is made of insulating ceramic.

[0015] In the sliding arc plasma torch proposed in the present invention, the arc generated between the bent tube electrodes is blown by the gas introduced through the central air inlet pipe to a position away from the fixed flange until it reaches the top of the electrode and breaks the arc, and the arc is regenerated at the nearest part of the electrode, thereby forming a continuous sliding arc between the three bent tube electrodes, thereby extending the service life of the electrodes.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the connection structure between the air knife and the frame of the present invention. DETAILED DESCRIPTION

[0019] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0020] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] like Figure 1-2 A sliding arc plasma torch shown comprises a fixed flange 1, an air inlet pipe 2 and a bent tube electrode 3, wherein:

[0025] The flange 1 is evenly provided with a plurality of flange holes 7 for easy fixation. The air inlet pipe 2 is vertically mounted on the fixed flange 1, and the air outlet of the air inlet pipe 2 extends to the lower end surface of the fixed flange 1;

[0026] There are three bent pipe electrodes 3, and the three bent pipe electrodes 3 are evenly distributed on the fixed flange 1 in the circumferential direction with the intersection of the axis of the intake pipe 2 and the upper end surface of the fixed flange 1 as the center of the circle.

[0027] The bent tube electrode 3 includes a vertical portion 30, a curved portion 31 and an inclined portion 32, wherein the curved portion 31 is located between the vertical portion 30 and the inclined portion 32, the vertical portion 30 is vertically mounted on the fixed flange 1, the curved portion 31 and the inclined portion 32 are located at the lower end of the fixed flange 1, and the inclined portion 32 gradually deviates from top to bottom in a direction away from the axis of the fixed flange 1; the curved portions 31 of the three bent tube electrodes 3 are close to each other, and the curved portions 31 are bent in a direction close to the axis of the fixed flange 1;

[0028] There is a circulating water cavity 10 in the curved tube electrode 3, and a water inlet 4 and a water outlet 5 are provided on the curved tube electrode 3, and both the water inlet 4 and the water outlet 5 are connected to the circulating water cavity 10;

[0029] The water inlet 4 and the water outlet 5 are both arranged at the upper part of the curved tube electrode 3;

[0030] The curved tube electrode 3 comprises an outer tube 8 and an inner tube 9, wherein the inner tube 9 is sleeved inside the outer tube 8, and a flow guiding cavity 11 is formed between the outer tube 8 and the inner tube 9, and the flow guiding cavity 11 is connected with the inner tube 9 to form a circulating water cavity 10;

[0031] The lower end of the outer tube 8 is sealed, the inner tube 9 is an open structure at both ends, and a flow guide channel is formed between the lower end surface of the inner tube 9 and the lower end of the outer tube 8;

[0032] The side wall of the outer tube 8 is provided with a water outlet 5, the upper end surface of the inner tube 9 is a water inlet 4, and the upper end surface of the inner tube 9 extends out of the outer tube 8;

[0033] An insulating member 6 is provided between the curved tube electrode 3 and the fixed flange 1 . The insulating member 6 is made of insulating ceramic and is sleeved on the curved tube electrode 3 .

[0034] In the working process of this embodiment: the water inlets 4 of the three elbow electrodes 3 are respectively connected to the rotary ring water pump, the water outlet 5 is connected to the water tank, the three elbow electrodes 3 are respectively connected to a 3000V high voltage power supply, the power frequency is 600Hz, the total power is 100KW (the power is adjustable), the air inlet pipe 2 is connected to the compressed air, and an air flow regulating valve is provided to adjust the flow;

[0035] Turn on the electrode rotation water pump, observe that the cooling water in the three elbow electrodes 3 rotates normally, open the compressed air valve, send compressed air into the air inlet pipe 2, turn on the high-voltage power supply, and a plasma arc is generated at the nearest part of the three elbow electrodes 3. The compressed air blows the plasma arc generated at the nearest part of the three elbow electrodes 3 to a position far away from the fixed flange 1. The arc is broken at the end of the elbow electrode 3, and a plasma arc is generated again at the nearest part of the three elbow electrodes 3, and this cycle repeats to form a continuous sliding arc. The power of the high-voltage power supply is adjusted to 6KW;

[0036] The compressed air flow rate was adjusted to 60 L / min, the high-voltage power supply power was adjusted to 100 kW, a stable plasma sliding arc was formed between the electrodes, and a high-temperature plasma torch with a length of 40 cm and a diameter of 15 cm was obtained.

[0037] In the present embodiment, preferably, there is a circulating water cavity 10 in the curved tube electrode 3, and a water inlet 4 and a water outlet 5 are provided on the curved tube electrode 3. The water inlet 4 and the water outlet 5 are both connected to the circulating water cavity 10, which is convenient for cooling the curved tube electrode 3 and increasing the utilization efficiency of the curved tube electrode 3.

[0038] In this embodiment, preferably, the water inlet 4 and the water outlet 5 are both arranged in the upper part of the curved tube electrode 3 to increase the cooling effect.

[0039] In this embodiment, the bent tube electrode 3 preferably includes an outer tube 8 and an inner tube 9, the inner tube 9 is inserted into the outer tube 8, a guide cavity 11 is formed between the outer tube 8 and the inner tube 9, the guide cavity 11 is connected with the inner tube 9 and forms a circulating water cavity 10, water circulates between the inner tube 9 and the guide cavity 11, and the water in the inner tube 9 has a cooling effect on the water and oil in the guide cavity 11, thereby increasing the cooling effect.

[0040] In this embodiment, preferably, the lower end of the outer tube 8 is sealed, the inner tube 9 is a structure with both ends open, and a guide channel is formed between the lower end surface of the inner tube 9 and the lower end of the outer tube 8 to further increase the cooling effect.

[0041] In this embodiment, preferably, a water outlet 5 is opened on the side wall of the outer tube 8, the upper end surface of the inner tube 9 is a water inlet 4, and the upper end surface of the inner tube 9 extends out of the outer tube 8, so as to facilitate water cooling of the curved tube electrode 3.

[0042] In this embodiment, preferably, an insulating member 6 is provided between the bent tube electrode 3 and the fixed flange 1 , and the insulating member 6 is sleeved on the bent tube electrode 3 , so that the bent tube electrode 3 and the fixed flange 1 can be insulated at a higher voltage.

[0043] In this embodiment, preferably, the insulating member 6 is made of insulating ceramics, which has a good insulating effect.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sliding arc plasma torch, characterized in that: It comprises a fixed flange (1), an air intake pipe (2) and a bent pipe electrode (3), wherein: The air inlet pipe (2) is vertically mounted on the fixed flange (1), and the air outlet of the air inlet pipe (2) extends to the lower end surface of the fixed flange (1); Three bent pipe electrodes (3) are provided, and the three bent pipe electrodes (3) are evenly distributed on the fixed flange (1) in the circumferential direction with the intersection of the axis of the air intake pipe (2) and the upper end surface of the fixed flange (1) as the center of the circle; The bent tube electrode (3) comprises a vertical portion (30), a curved portion (31) and an inclined portion (32); the curved portion (31) is located between the vertical portion (30) and the inclined portion (32); the vertical portion (30) is vertically mounted on a fixed flange (1); the curved portion (31) and the inclined portion (32) are located at the lower end of the fixed flange (1); the inclined portion (32) gradually deviates from top to bottom in a direction away from the axis of the fixed flange (1); and the curved portions (31) of the three bent tube electrodes (3) are close to each other.

2. The sliding arc plasma torch according to claim 1, characterized in that A circulating water cavity (10) is provided in the curved tube electrode (3), and a water inlet (4) and a water outlet (5) are provided on the curved tube electrode (3), and both the water inlet (4) and the water outlet (5) are connected to the circulating water cavity (10).

3. The sliding arc plasma torch according to claim 2, characterized in that: The water inlet (4) and the water outlet (5) are both arranged at the upper part of the curved tube electrode (3).

4. The sliding arc plasma torch according to claim 2, characterized in that: The bent tube electrode (3) comprises an outer tube (8) and an inner tube (9), wherein the inner tube (9) is sleeved inside the outer tube (8), a flow guide cavity (11) is formed between the outer tube (8) and the inner tube (9), and the flow guide cavity (11) is connected to the inner tube (9) to form a circulating water cavity (10).

5. The sliding arc plasma torch according to claim 4, characterized in that The lower end of the outer tube (8) is sealed, the inner tube (9) is a structure with both ends open, and a flow guide channel is formed between the lower end surface of the inner tube (9) and the lower end of the outer tube (8).

6. The sliding arc plasma torch according to claim 4, characterized in that A water outlet (5) is provided on the side wall of the outer tube (8), the upper end surface of the inner tube (9) is a water inlet (4), and the upper end surface of the inner tube (9) extends out of the outer tube (8).

7. The sliding arc plasma torch according to claim 1, characterized in that: An insulating member (6) is provided between the bent tube electrode (3) and the fixed flange (1), and the insulating member (6) is sleeved on the bent tube electrode (3).

8. The sliding arc plasma torch according to claim 7, characterized in that The insulating member (6) is made of insulating ceramic.

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