CN213872691U

CN213872691U - Gas burner for plasma gasification melting furnace

Info

Publication number: CN213872691U
Application number: CN202022993740.3U
Authority: CN
Inventors: 刘飞; 李宁建; 苏林; 高森; 王忠良; 黄清臣
Original assignee: Nanjing Chuangneng Electric Power Technology Development Co ltd
Current assignee: Nanjing Chuangneng Electric Power Technology Development Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-08-03
Anticipated expiration: 2030-12-14

Abstract

The utility model belongs to the technical field of the combustor, concretely relates to gas burner for plasma gasification melting furnace. The utility model comprises a premixing chamber, wherein the premixing chamber is provided with a gas mixing component, and the premixing chamber is connected with an air pipe and a gas pipe in a run-through way; the premixing chamber is connected with a reducing pipe, the reducing pipe is connected with an adjusting pipe, flow guide strips are evenly distributed on the inner wall of the adjusting pipe, the adjusting pipe is connected with a first connecting flange, a first connecting flange is connected with a Venturi pipe, the Venturi pipe is connected with a second connecting flange, the second connecting flange is connected with an injection pipe, a cooling pipe is installed on the outer side of the injection pipe, and a protective shell is installed on the outer side of the cooling pipe. The utility model discloses can guarantee that gas and air mixing are complete to avoid the tempering condition to take place, add the protecting sheathing simultaneously in order to protect the injection pipe, improved equipment life, also satisfy the service environment of plasma gasification melting furnace simultaneously.

Description

Gas burner for plasma gasification melting furnace

Technical Field

The utility model belongs to the technical field of the combustor, concretely relates to gas burner for plasma gasification melting furnace.

Background

The burner is a heat energy device which can feed fuel and air into the furnace chamber according to the required concentration, speed, turbulence and mixing mode, and can make the fuel stably catch fire and burn in the furnace chamber. The burners may be classified into an oil burner, a gas burner, and a dual fuel burner according to their fuels. The plasma gasification melting technology can decompose organic matters into combustible gas and melt inorganic matters into glassy crystals, and is a novel environment-friendly hazardous waste treatment technology.

In the plasma gasification melting furnace in the prior art, a burner is not used for preheating the melting furnace, and the existing burner cannot meet the use environment of the plasma gasification melting furnace.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a gas burner for a plasma gasification melting furnace.

The utility model provides a following technical scheme:

a gas burner for a plasma gasification melting furnace comprises a premixing chamber, wherein a gas mixing component is arranged in the premixing chamber, and an air pipe and a gas pipe are connected in the premixing chamber in a penetrating way; one end of the premixing chamber, which is far away from the air pipe, is communicated with a reducing pipe; one end of the reducing pipe, which is far away from the premixing chamber, is in through connection with an adjusting pipe, and guide strips are uniformly distributed on the inner wall of the adjusting pipe; one end of the adjusting pipe, which is far away from the reducing pipe, is provided with a first connecting flange, and one end of the first connecting flange, which is far away from the adjusting pipe, is provided with a Venturi tube; one end of the Venturi tube, which is far away from the connecting flange, is provided with a connecting flange II, one end of the connecting flange II, which is far away from the Venturi tube, is provided with an injection tube, and an ignition electrode and a flame stabilizing disc are arranged in the injection tube; a cooling pipe is arranged on the outer side of the injection pipe, a cooling cavity is arranged in the cooling pipe, an opening at one end of the cooling cavity is connected with a water inlet pipe, and an opening at the other end of the cooling cavity is connected with a water outlet pipe; and a protective shell is arranged on the outer side of the cooling pipe.

The air pipe and the fuel gas pipe are perpendicular to each other.

The inner diameter ratio of the air pipe to the fuel gas pipe is 10: 2.

And the air pipe is provided with an air volume regulating valve in a matching way.

And the gas pipe is provided with a gas regulating valve in a matching way.

The inner diameter of the reducer close to one end of the premixing chamber is larger than that of the reducer close to one end of the adjusting pipe.

The protective shell is made of ceramic.

And a first pressure sensor is arranged on the premixing chamber.

And a second pressure sensor is arranged on the Venturi tube.

The gas mixing component comprises a support fixedly connected to the inner wall of the premixing chamber, a rotating seat is installed on the support in a matched mode, and rotating blades are installed on the rotating seat.

The utility model has the advantages that:

the utility model discloses can guarantee that gas and air mixing are complete to avoid the tempering condition to take place, add the protecting sheathing simultaneously in order to protect the injection pipe, improved equipment life, also satisfy the service environment of plasma gasification melting furnace simultaneously.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

fig. 3 is an enlarged view at B in fig. 1.

Labeled as: the device comprises a premixing chamber 101, a gas mixing assembly 102, a gas pipe 103, a gas regulating valve 104, an air pipe 105, an air volume regulating valve 106, a reducer 107, a regulating pipe 108, a flow guide strip 109, a first connecting flange 110, a venturi pipe 111, a second connecting flange 112, an ignition electrode 113, a cooling pipe 114, an injection pipe 115, a cooling cavity 116, a protective shell 117, a second pressure sensor 118, a first pressure sensor 119 and a water outlet pipe 120.

Detailed Description

As shown, a gas burner for a plasma gasification melting furnace includes a premixing chamber 101 for premixing air and gas. Accordingly, an air intake chamber and a gas intake chamber are provided on the housing of the pre-mixing chamber 101, and an air pipe 105 is installed in the air intake chamber and a gas pipe 103 is installed in the gas intake chamber, so that air and gas can be injected into the pre-mixing chamber 101 through the air pipe 105 and the gas pipe 103. In order to control the intake air amount, an air volume adjusting valve 106 is fittingly installed on the air pipe 105 so that the intake air amount of air can be controlled by the air volume adjusting valve 106; a gas regulating valve 104 is fittingly installed on the gas pipe 103 so that the gas intake amount can be controlled by the gas regulating valve 104. In order to enable the air and the gas entering the pre-mixing chamber 101 to be sufficiently mixed, the air pipe 105 and the gas pipe 103 are perpendicular to each other, and specifically, the center line of the air outlet of the air inlet chamber and the center line of the gas outlet of the gas inlet chamber are perpendicular to each other, so that the air flow of the air blown into the pre-mixing chamber 101 from the air inlet chamber and the gas flow of the gas blown into the pre-mixing chamber 101 from the gas outlet of the gas inlet chamber are perpendicular to each other, and thus the two air flows are opposite to each other and are mixed. Meanwhile, in order to further mix the air and the gas, a gas mixing assembly 102 is further installed in the pre-mixing chamber 101, and the gas mixing assembly 102 includes a bracket fixedly installed in the pre-mixing chamber 101 by welding, and one end of the bracket is fixedly installed on the inner wall of the pre-mixing chamber 101 by welding. The rotary seat is installed on the support and specifically comprises a bearing, the bearing is installed on the support, the rotary shaft is installed on the bearing, the rotary shaft end is provided with the rotary disk, and the rotary disk is connected with and provided with the rotary blades through bolts. The rotation axis of the rotating blade coincides with the center line of the gas outlet of the gas inlet cavity, so that after the gas after preliminary mixing flows to the rotating blade, the gas drives the rotating blade to rotate, and the rotating blade stirs the gas flow, so that the air and the gas are further mixed. Preferably, the ratio of the inner diameters of the air pipe 105 and the gas pipe 103 is set to 10:2, so as to ensure that the air concentration in the premixing chamber 101 is greater than the gas concentration, thereby facilitating sufficient combustion of the gas. In order to detect the gas pressure in the premixing chamber 101, a first pressure sensor 119 is installed on the premixing chamber 101, specifically, a probe of the first pressure sensor 119 is inserted into the premixing chamber 101, and a signal line of the first pressure sensor 119 is connected with a computer, so that the gas pressure in the premixing chamber 101 can be detected in real time, and the air intake amount of air and fuel gas can be adjusted according to the gas pressure.

A reducer 107 is connected to the end of the premixing chamber 101 facing away from the air tube 105 by welding, and a regulator tube 108 is connected to the end of the reducer 107 facing away from the premixing chamber 101 by welding. Reducer 107 is in communication with premix chamber 101, and regulator tube 108 is in communication with reducer 107. And the inside diameter of the reducer 107 near the end of the premix chamber 101 is larger than the inside diameter near the end of the regulator pipe 108, so that the premix gas is accelerated. Meanwhile, the guide strips 109 are uniformly distributed on the inner wall of the adjusting pipe 108, and the existence of the guide strips 109 reduces the pipe cross-sectional area of the adjusting pipe 108, so that the mixed gas entering the adjusting pipe 108 from the reducing pipe 107 is further accelerated. The actual flow velocity of the mixed gas accelerated by the reducer 107 and the regulator 108 is significantly greater than the theoretical flame propagation velocity, thereby effectively preventing the occurrence of the backfire phenomenon.

A first connecting flange 110 is fittingly mounted on an end of the adjusting pipe 108 facing away from the reducing pipe 107, and a venturi tube 111 is mounted on an end of the first connecting flange 110 facing away from the adjusting pipe 108. And a second pressure sensor 118 is installed on the venturi tube 111, one end of a probe of the second pressure sensor 118 is extended into the venturi tube 111, and then a signal line of the second pressure sensor 118 is connected with a computer, so that the pressure of the accelerated mixed gas in the venturi tube 111 can be detected in real time.

And a second connecting flange 112 is arranged at one end of the venturi tube 111, which is far away from the first connecting flange 110, and an injection pipe 115 is arranged at one end of the second connecting flange 112, which is far away from the venturi tube 111. An ignition electrode 113 and a flame stabilizing disk are installed in the injection pipe 115 so that the mixed gas can be ignited by the ignition electrode 113. A cooling pipe 114 is attached to the outside of the injection pipe 115, and a cooling chamber 116 is provided in the cooling pipe 114, the cooling chamber 116 having a ring shape. One end of the cooling cavity 116 is open and connected with a water inlet pipe, and the other end of the cooling cavity 116 is open and connected with a water outlet pipe 120. When the ignition is in work, water is filled in the annular cooling cavity 116, so that the temperature is reduced. Because one end of the injection pipe 115 is required to extend into the melting furnace when the burner is installed, in order to protect the injection pipe 115 and prolong the service life of the injection pipe 115, a protective shell 117 is installed on the outer side of the cooling pipe 114, the cooling pipe 114 is completely wrapped by the protective shell 117, so that the protective shell 117 is exposed in the melting furnace, and the protective shell 117 is made of ceramic which has better high-temperature resistance.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas burner for a plasma gasification melting furnace, characterized in that: the gas mixing device comprises a premixing chamber (101), wherein a gas mixing component (102) is installed in the premixing chamber (101), and an air pipe (105) and a gas pipe (103) are connected in the premixing chamber (101) in a penetrating manner; one end of the premixing chamber (101) far away from the air pipe (105) is connected with a reducing pipe (107) in a penetrating way; one end of the reducing pipe (107) departing from the premixing chamber (101) is in through connection with an adjusting pipe (108), and guide strips (109) are uniformly distributed on the inner wall of the adjusting pipe (108); one end of the adjusting pipe (108) departing from the reducing pipe (107) is connected with a Venturi pipe (111) through a first connecting flange (110); one end of the Venturi tube (111) departing from the first connecting flange (110) is connected with an injection tube (115) through a second connecting flange (112), and an ignition electrode (113) and a flame stabilizing disc are installed in the injection tube (115); a cooling pipe (114) is arranged on the outer side of the injection pipe (115), a cooling cavity (116) is arranged in the cooling pipe (114), an opening at one end of the cooling cavity (116) is connected with a water inlet pipe, and an opening at the other end of the cooling cavity (116) is connected with a water outlet pipe (120); a protective shell (117) is mounted on the outer side of the cooling pipe (114).

2. The gas burner for a plasma gasification melting furnace of claim 1, wherein: the air pipe (105) and the gas pipe (103) are perpendicular to each other.

3. The gas burner for a plasma gasification melting furnace of claim 2, wherein: the inner diameter ratio of the air pipe (105) to the gas pipe (103) is 10: 2.

4. The gas burner for a plasma gasification melting furnace of claim 3, wherein: and an air volume adjusting valve (106) is arranged on the air pipe (105) in a matched manner.

5. The gas burner for a plasma gasification melting furnace according to claim 3 or 4, characterized in that: and a gas regulating valve (104) is arranged on the gas pipe (103) in a matched manner.

6. The gas burner for a plasma gasification melting furnace of claim 1, wherein: the inner diameter of one end of the reducer (107) close to the premixing chamber (101) is larger than that of one end close to the adjusting pipe (108).

7. The gas burner for a plasma gasification melting furnace of claim 1, wherein: the material of the protective shell (117) is ceramic.

8. The gas burner for a plasma gasification melting furnace of claim 1, wherein: and a first pressure sensor (119) is arranged on the premixing chamber (101).

9. The gas burner for a plasma gasification melting furnace of claim 1, wherein: and a second pressure sensor (118) is arranged on the Venturi tube (111).

10. The gas burner for a plasma gasification melting furnace of claim 1, wherein: the gas mixing component (102) comprises a support fixedly connected to the inner wall of the premixing chamber (101), a rotating seat is installed on the support in a matched mode, and rotating blades are installed on the rotating seat.