CN109714850A

CN109714850A - It is a kind of for generating the high efficiency method of clean high temperature air

Info

Publication number: CN109714850A
Application number: CN201811559191.XA
Authority: CN
Inventors: 张晰哲; 张志豪; 贾桂友
Original assignee: Xian Aerospace Propulsion Institute
Current assignee: Xian Aerospace Propulsion Institute
Priority date: 2018-12-19
Filing date: 2018-12-19
Publication date: 2019-05-03

Abstract

It is a kind of for generating the high efficiency method of clean high temperature air, gas heating tool is constructed first, including plasma torch, air inlet component, anode, cathode, direct-current arc, accessory structure, plasma torch is oval tubular, air inlet component is the rotary table with tangential through-hole, anode, cathode is tubulose, air inlet component, anode and cathode is mounted in plasma torch, it is arranged along axis sequence, direct-current arc is between anode and cathode, the arc root at both ends is respectively fallen on the inner wall of anode and cathode, arc column is overlapped with the structure axis of plasma torch, accessory structure includes cooling water pipeline, insulator between anode and cathode, for constraining the electromagnetic coil of direct-current arc, then normal temperature air is heated using plasma heating device, obtain clean high temperature air.

Description

It is a kind of for generating the high efficiency method of clean high temperature air

Technical field

The present invention relates to a kind of methods for generating high temperature air, can efficiently produce clean high temperature air, belong to Gas ions technical field.

Background technique

High temperature air has very extensive purposes, generation side in fields such as aerospace, metallurgical smelting, environmental protections Formula is generally electrothermal, fuel oil type, coal etc., but the defects such as these methods generally existing preheating time is long, heating efficiency is low, Some methods can also cause centainly to pollute to the air being heated.

Summary of the invention

Problems solved by the invention: in place of overcome the deficiencies in the prior art, providing a kind of efficient air heating means, can To generate clean high temperature air, overcome that conventional method preheating time is long, heating efficiency is low, heating system is complicated huge lacks Point.

The technical solution of the invention is as follows: a kind of for generating the high efficiency method of clean high temperature air, including following step It is rapid:

(1) gas heating tool is constructed；

(2) normal temperature air is heated using plasma heating device, obtains clean high temperature air.

The gas heating tool includes plasma torch, air inlet component, anode, cathode, direct-current arc, attached knot Structure, in which:

Plasma torch is oval tubular, and air inlet component is that rotary table, anode, cathode with tangential through-hole are tubulose, Air inlet component, anode and cathode are mounted in plasma torch, along axis sequence arrange, direct-current arc between anode and cathode, The arc root at both ends is respectively fallen on the inner wall of anode and cathode, and arc column is overlapped with the structure axis of plasma torch, accessory structure Including the insulator between cooling water pipeline, anode and cathode, the electromagnetic coil for constraining direct-current arc.

The anode, cathode are powered to plasma torch, are generated between electrode and are maintained direct-current arc.

The direct-current arc adjusts direct-current arc intensity, passes through the temperature reached after plasma torch to control gas.

The tolerance that the plasma torch passes through is suitable with the amount of clean high temperature air that needs obtain.

It is a kind of for generating the device of clean high temperature air, including plasma torch, air inlet component, anode, cathode, direct current Electric arc, accessory structure, in which:

Compared with the prior art, the invention has the advantages that:

(1) since direct-current arc reaches the temperature of superelevation immediately after a birth, the present invention heats gas by direct-current arc Body greatly promotes gas heating speed, eliminates very long preheating time, can obtain institute in 2~3s after system boot The high temperature air needed；

(2) present invention heats air using electric heating conversion regime, and compared with fuel oil or coal combustion process, this method is not Air can be polluted, can get clean high temperature air, compared with traditional electric heating method, thermal conversion efficiency is improved 20% or more.

Detailed description of the invention

Fig. 1 is the schematic diagram for the high efficiency method that the present invention generates clean high temperature air, and normal temperature air as shown in the figure is being undergone Height is heated to be after plasma torch 1, air inlet component 2, anode 3, cathode 4, direct-current arc 5 and plasma torch accessory structure Warm air.

Specific embodiment

In view of the deficiencies of the prior art, the present invention proposes a kind of efficient air heating means, can produce clean height Warm air, overcomes that conventional method preheating time is long, heating efficiency is low, the complicated huge disadvantage of heating system.It is as shown in Figure 1 The present invention generates the schematic diagram of the high efficiency method of clean high temperature air, normal temperature air experience plasma torch 1, air inlet component 2, High temperature air is heated to be after anode 3, cathode 4, direct-current arc 5 and plasma torch accessory structure.

Plasma torch 1 is oval tubular, and air inlet component 2 is that rotary table, anode 3, cathode 4 with tangential through-hole are pipe Shape, air inlet component 2, anode 3 and cathode 4 are mounted in plasma torch 1, arrange that direct-current arc 5 is in anode 2 along axis sequence It is generated between cathode 3, the arc root at electric arc both ends respectively falls in the inner wall of anode and cathode, arc column part and plasma torch 1 Structure axis is overlapped.Accessory structure includes cooling water pipeline, necessary insulator between anode 2 and cathode 3, and straight for constraining The electromagnetic coil of galvanic electricity arc 5.

The present invention selects plasma torch as gas heating tool first, determines plasma according to the tolerance that need to be obtained The air intake structure and supply gas pressure of torch, make equal with the tolerance that need to be obtained by the tolerance of plasma torch electrode, make plasma Direct-current arc is generated and maintained between the electrode of body torch, adjusts the intensity of direct-current arc, is passed through after plasma torch with controlling gas The temperature reached.

(1) determine that the air inlet component of plasma torch has the air inlet of 4 diameter 1mm according to required tolerance 15g/s, Adjacent air inlet angle is 90 °, and is in all direction tangential with electrode circumference.

(2) adjustment gas supply pressure is 0.35MPa, reaches the tolerance for entering plasma torch electrode by air inlet component To between 2~60g/s, optimal is 15g/s, and the airintake direction of plasma torch should be the tangential admission of electrode circumference.

(3) it powers to plasma torch, direct-current arc is generated and maintained between electrode, at this time the current strength of direct-current arc For 50~1200A, optimal is 150A, power 60kW, Outlet Gas Temperature 2500K.

(4) gas temperature 3000K as needed promotes the current strength of direct-current arc to 215A, power 80kW, then Outlet Gas Temperature is promoted to 3000K.

In conclusion the present invention selects suitable DC arc plasma jet, really according to the tolerance and temperature that need to obtain Determine the structure and running parameter of plasma torch；Gas supply pressure is adjusted, the tolerance by plasma torch electrode is made and is needed The amount for the clean high temperature air to be obtained is suitable；It is generated between the electrode of plasma torch and maintains direct-current arc；Adjust direct current The intensity of electric arc will be heated to required temperature by the air of plasma torch.Compared with prior art, the present invention significantly mentions The high generation speed of high temperature air, and have many advantages, such as thermal conversion efficiency height, pollution-free to gas.

The content that description in the present invention is not described in detail belongs to the well-known technique of those skilled in the art.

Claims

1. an efficient method for producing clean high temperature air is characterized in that comprising the following steps:

(1) Build a gas heating tool;

(2) The normal temperature air is heated using a plasma heating device to obtain clean high temperature air.

2. The efficient method for generating clean high-temperature air according to claim 1, wherein the gas heating tool comprises a plasma torch (1), an air intake part (2), an anode (3), a cathode (4) ), DC arc (5), ancillary structure, of which:

The plasma torch (1) is in the shape of a long cylinder, the air inlet part (2) is a circular frustum with a tangential through hole, the anode (3) and the cathode (4) are all tubular, the air inlet part (2), the anode (3) ) and the cathode (4) are installed in the plasma torch (1), arranged in sequence along the axis, the DC arc (5) is between the anode (2) and the cathode (3), and the arc roots at both ends fall on the inner walls of the anode and the cathode respectively Above, the arc column coincides with the structural axis of the plasma torch (1), and the auxiliary structure includes a cooling water pipeline, an insulator between the anode (2) and the cathode (3), and an electromagnetic coil for constraining the DC arc (5).

3. A high-efficiency method for generating clean high-temperature air according to claim 1 or 2, characterized in that: the anode (3) and the cathode (4) supply power to the plasma torch (5), and generate electricity between the electrodes and maintain the DC arc.

4. A high-efficiency method for generating clean high-temperature air according to claim 1 or 2, wherein the DC arc (5) adjusts the DC arc intensity to control the temperature reached by the gas after passing through the plasma torch.

5. The high-efficiency method for generating clean high-temperature air according to claim 1 or 2, characterized in that: the amount of gas passed through the plasma torch (1) is equivalent to the amount of clean high-temperature air to be obtained.

6. A device for generating clean high-temperature air, characterized in that it comprises a plasma torch (1), an air intake part (2), an anode (3), a cathode (4), a DC arc (5), and an auxiliary structure, in:

The plasma torch (1) is in the shape of a long cylinder, the air inlet part (2) is a circular frustum with a tangential through hole, the anode (3) and the cathode (4) are all tubular, and the air inlet part (2), the anode (3) and the The cathode (4) is installed in the plasma torch (1) and arranged in sequence along the axis, the DC arc (5) is between the anode (2) and the cathode (3), and the arc roots at both ends fall on the inner walls of the anode and the cathode respectively, The arc column coincides with the structural axis of the plasma torch (1), and the auxiliary structure includes a cooling water pipeline, an insulator between the anode (2) and the cathode (3), and an electromagnetic coil for constraining the DC arc (5).

7. A device for generating clean high-temperature air according to claim 6, characterized in that: the anode (3) and the cathode (4) supply power to the plasma torch (5), and generate air between the electrodes. Maintain the DC arc.

8 . The device for generating clean high-temperature air according to claim 6 , wherein the DC arc ( 5 ) adjusts the DC arc intensity to control the temperature reached by the gas after passing through the plasma torch. 9 .