CN112020198A

CN112020198A - Sliding arc plasma torch

Info

Publication number: CN112020198A
Application number: CN202010788053.XA
Authority: CN
Inventors: 翁坚; 丁恩振; 郭俊泽
Original assignee: Hefei Zhongke Yuanwang Environmental Protection Technology Co ltd
Current assignee: Hefei Zhongke Yuanwang Environmental Protection Technology Co ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-12-01

Abstract

The invention discloses a sliding arc plasma torch, which comprises a fixed flange, an air inlet pipe and a bent pipe electrode, wherein: the air inlet pipe is vertically arranged on the fixed flange, and an air outlet of the air inlet pipe extends to the lower end face of the fixed flange; the number of the bent pipe electrodes is three, and the three bent pipe electrodes are circumferentially and uniformly distributed on the fixed flange by taking the intersection point of the axis of the air inlet pipe and the upper end face of the fixed flange as the circle center. According to the sliding arc plasma torch provided by the invention, the electric arc generated between the bent tube electrodes is blown to the position far away from the fixed flange by the gas introduced from the central gas inlet pipe until the arc is broken at the top end of the electrode, and the electric arc is regenerated at the nearest part of the electrode, so that continuous sliding electric arc is formed between the bent tube electrode groups, and the service life of the electrode is prolonged.

Description

Sliding arc plasma torch

Technical Field

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

Background

High-concentration organic waste liquid, such as breeding waste water, waste mineral oil, waste solvent produced in laboratories or factories, chemical dyes and the like, has the characteristics of high organic matter content, complex components, high particulate matter content and the like, and can seriously affect the ecological environment and human health if directly discharged into the environment. The existing treatment process has the defects of large investment, long period, complex process and the like, and the plasma can quickly generate an environment with high temperature and high energy density, and has great advantages in the aspects of harmless and resource treatment of high-concentration organic waste liquid.

Disclosure of Invention

In order to solve the technical problems in the background art, the invention provides a sliding arc plasma torch.

The invention provides a sliding arc plasma torch, which comprises a fixed flange, an air inlet pipe and a bent pipe electrode, wherein:

the air inlet pipe is vertically arranged on the fixed flange, and an air outlet of the air inlet pipe extends to the lower end face of the fixed flange;

the number of the bent pipe electrodes is three, and the three bent pipe electrodes are uniformly distributed on the fixed flange in the circumferential direction by taking the intersection point of the axis of the air inlet pipe and the upper end face of the fixed flange as the circle center;

the bent tube electrode comprises a vertical part, a bending part and an inclined part, wherein the bending part is positioned between the vertical part and the inclined part, the vertical part is vertically installed on the fixed flange, the bending part and the inclined part are positioned at the lower end of the fixed flange, the inclined part gradually deviates from top to bottom in the axial direction far away from the fixed flange, and the bending parts of the three bent tube electrodes are close to each other, namely the bending parts are protruded in the axial direction close to the fixed flange.

As a further optimized scheme of the invention, a circulating water cavity is arranged in the elbow electrode, a water inlet and a water outlet are arranged on the elbow electrode, and the water inlet and the water outlet are both communicated with the circulating water cavity.

As a further optimized scheme of the invention, the water inlet and the water outlet are both arranged on the upper half part of the elbow electrode.

As a further optimized scheme of the invention, the elbow electrode comprises an outer pipe and an inner pipe, the inner pipe is sleeved in the outer pipe, a diversion cavity is formed between the outer pipe and the inner pipe, and the diversion cavity is communicated with the inner pipe to form a circulating water cavity.

As a further optimized scheme of the invention, the lower end of the outer pipe is sealed, the inner pipe is of a structure with two open ends, and a flow guide channel is formed between the lower end surface of the inner pipe and the lower end of the outer pipe.

As a further optimized scheme of the invention, a water outlet is formed in the side wall of the outer pipe, a water inlet is formed in the upper end face of the inner pipe, and the upper end face of the inner pipe extends out of the outer pipe.

As a further optimized scheme of the invention, an insulating part is arranged between the elbow electrode and the fixed flange, and the insulating part is sleeved on the elbow electrode.

As a further optimized scheme of the invention, the insulating part is made of insulating ceramics.

According to the sliding arc plasma torch, the arc generated between the bent tube electrodes is blown to the position far away from the fixed flange by the gas introduced from the central gas inlet pipe until the arc is broken at the top end of the electrode, and the arc is generated again at the nearest part of the electrode, so that continuous sliding arc is formed between the three bent tube electrodes, and the service life of the electrode is prolonged.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a connecting structure of an air knife and a frame according to the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar designations denote like or similar elements or elements having like or similar functionality throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

It will be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated in the drawings for convenience and simplicity of description only and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

A sliding arc plasma torch as shown in fig. 1-2, comprising a mounting flange 1, an inlet tube 2 and an elbow electrode 3, wherein:

a plurality of flange holes 7 are uniformly formed in the flange 1, so that the flange is convenient to fix, the air inlet pipe 2 is vertically arranged on the fixed flange 1, and an air outlet of the air inlet pipe 2 extends to the lower end face of the fixed flange 1;

the number of the bent pipe electrodes 3 is three, and the three bent pipe electrodes 3 are circumferentially and uniformly distributed on the fixed flange 1 by taking the intersection point of the axis of the air inlet pipe 2 and the upper end face of the fixed flange 1 as the circle center

The bent pipe electrode 3 comprises a vertical part 30, a bent part 31 and an inclined part 32, wherein the bent part 31 is positioned between the vertical part 30 and the inclined part 32, the vertical part 30 is vertically installed on the fixed flange 1, the bent part 31 and the inclined part 32 are positioned at the lower end of the fixed flange 1, and the inclined part 32 is gradually offset from top to bottom in the axial direction away from the fixed flange 1; the bent parts 31 of the three bent tube electrodes 3 are close to each other, and the bent parts 31 are bent towards the direction close to the axis of the fixed flange 1;

a circulating water cavity 10 is arranged in the bent pipe electrode 3, a water inlet 4 and a water outlet 5 are arranged on the bent pipe electrode 3, and the water inlet 4 and the water outlet 5 are both communicated with the circulating water cavity 10;

the water inlet 4 and the water outlet 5 are both arranged on the upper half part of the elbow electrode 3;

the elbow electrode 3 comprises an outer pipe 8 and an inner pipe 9, the inner pipe 9 is sleeved in the outer pipe 8, a diversion cavity 11 is formed between the outer pipe 8 and the inner pipe 9, and the diversion cavity 11 is communicated with the inner pipe 9 to form a circulating water cavity 10;

the lower end of the outer pipe 8 is sealed, the inner pipe 9 is of a structure with two open ends, and a flow guide channel is formed between the lower end surface of the inner pipe 9 and the lower end of the outer pipe 8;

a water outlet 5 is formed in the side wall of the outer pipe 8, a water inlet 4 is formed in the upper end face of the inner pipe 9, and the upper end face of the inner pipe 9 extends out of the outer pipe 8;

an insulating part 6 is arranged between the bent pipe electrode 3 and the fixed flange 1, the insulating part 6 is made of insulating ceramics, and the insulating part 6 is sleeved on the bent pipe electrode 3.

In the working process of the embodiment: the water inlets 4 of the three bent pipe electrodes 3 are respectively connected with a rotary ring water pump, the water outlets 5 are connected with a water tank, the three bent pipe electrodes 3 are respectively connected with a 3000V high-voltage power supply, the power frequency is 600Hz, the total power is 100KW (power is adjustable), the air inlet pipe 2 is connected with compressed air, and an air flow regulating valve is arranged to regulate the flow;

opening an electrode rotary ring water pump, observing a normal rotary ring of cooling water in three bent pipe electrodes 3, opening a compressed air valve, feeding compressed air into an air inlet pipe 2, opening a high-voltage power supply, generating plasma arcs at the nearest parts of the three bent pipe electrodes 3, blowing the plasma arcs generated at the nearest parts of the three bent pipe electrodes 3 to a position far away from a fixed flange 1 by the compressed air, breaking the arcs at the tail ends of the bent pipe electrodes 3, generating the plasma arcs at the nearest parts of the three bent pipe electrodes 3 again, repeating the steps repeatedly to form continuous sliding arcs, and adjusting the power of the high-voltage power supply to 6 KW;

the compressed air flow is adjusted to 60L/min, the power of a high-voltage power supply is adjusted to 100KW, a stable plasma sliding arc is formed between electrodes, and a high-temperature plasma torch with the length of 40cm and the diameter of 15cm is formed.

In this embodiment, it is preferable that a circulating water chamber 10 is provided in the elbow electrode 3, a water inlet 4 and a water outlet 5 are provided on the elbow electrode 3, and the water inlet 4 and the water outlet 5 are both communicated with the circulating water chamber 10, so as to facilitate cooling of the elbow electrode 3 and increase the use efficiency of the elbow electrode 3.

In the embodiment, preferably, the water inlet 4 and the water outlet 5 are both arranged on the upper half part of the elbow electrode 3, so that the cooling effect is increased.

In this embodiment, preferably, the elbow electrode 3 includes an outer tube 8 and an inner tube 9, the inner tube 9 is sleeved in the outer tube 8, a diversion cavity 11 is formed between the outer tube 8 and the inner tube 9, the diversion cavity 11 is communicated with the inner tube 9 and forms a circulating water cavity 10, water circulates between the inner tube 9 and the diversion cavity 11, and water in the inner tube 9 has a cooling effect on water and oil in the diversion cavity 11, so that the cooling effect is increased.

In this embodiment, preferably, the lower end of the outer tube 8 is sealed, the inner tube 9 has a structure with two open 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, so as to further increase the cooling effect.

In this embodiment, it is preferable that 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, so as to facilitate water cooling of the elbow electrode 3.

In the present embodiment, it is preferable that an insulating member 6 is provided between the bent-tube electrode 3 and the fixed flange 1, and the insulating member 6 is fitted over the bent-tube electrode 3, so that the bent-tube electrode 3 and the fixed flange 1 can be insulated from each other at a higher voltage.

In the present embodiment, it is preferable that the insulating member 6 is made of insulating ceramic, and the insulating effect is good.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A sliding arc plasma torch comprising a mounting flange (1), an inlet tube (2) and an elbow electrode (3), wherein:

the air inlet pipe (2) is vertically arranged on the fixed flange (1), and an air outlet of the air inlet pipe (2) extends to the lower end face of the fixed flange (1);

the number of the bent pipe electrodes (3) is three, and the three bent pipe electrodes (3) are circumferentially and uniformly distributed on the fixed flange (1) by taking the intersection point of the axis of the air inlet pipe (2) and the upper end face of the fixed flange (1) as the circle center;

the bent tube electrode (3) comprises a vertical part (30), a bending part (31) and an inclined part (32), wherein the bending part (31) is located between the vertical part (30) and the inclined part (32), the vertical part (30) is vertically installed on the fixed flange (1), the bending part (31) and the inclined part (32) are located at the lower end of the fixed flange (1), the inclined part (32) is gradually deviated from the upper part to the lower part in the axial direction far away from the fixed flange (1), and the bending parts (31) of the three bent tube electrodes (3) are close to each other.

2. The sliding arc plasma torch according to claim 1, wherein a circulating water chamber (10) is provided in the elbow electrode (3), a water inlet (4) and a water outlet (5) are provided on the elbow electrode (3), and the water inlet (4) and the water outlet (5) are both communicated with the circulating water chamber (10).

3. The sliding arc plasma torch according to claim 2, wherein the water inlet (4) and the water outlet (5) are both provided in the upper half of the bent tube electrode (3).

4. The sliding arc plasma torch according to claim 2, wherein the elbow electrode (3) comprises an outer tube (8) and an inner tube (9), the inner tube (9) is sleeved inside the outer tube (8), a diversion cavity (11) is formed between the outer tube (8) and the inner tube (9), and the diversion cavity (11) is communicated with the inner tube (9) and constitutes the circulating water cavity (10).

5. The sliding arc plasma torch according to claim 4, wherein the lower end of the outer tube (8) is sealed, the inner tube (9) is of a two-end open structure, 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, wherein the outer tube (8) has a water outlet (5) opened in a side wall thereof, the inner tube (9) has a water inlet (4) at an upper end thereof, and the inner tube (9) has an upper end thereof extended out of the outer tube (8).

7. The sliding arc plasma torch according to claim 1, wherein an insulator (6) is provided between the bent tube electrode (3) and the fixed flange (1), the insulator (6) being fitted over the bent tube electrode (3).

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