JP2007278562A - Burner and combustion treatment method for waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a burner and a method of treating wastes by ultrahigh-temperature combustion, capable of achieving ultrahigh-temperature combustion of 2000°C or more to treat harmful substances such as dioxin and asbestos. <P>SOLUTION: This burner comprises a plasma gas producing means 10 for plasmizing a mixture gas by applying a voltage to the mixture gas prepared by mixing a fuel and the air, producing a plasma gas in which cation and electron are mixed, and sucking the electron in the plasma gas, a magnetic field generating device 20 generating magnetic field in a flow channel in which the cation gas remaining after suction of electron flows, and collecting the cation gas to one shaft in the flow channel, and an ignition means 30 for igniting the collected cation gas. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention converts a mixed gas of fuel and air into a plasma, applies a magnetic field to attract electrons in the plasma gas, focuses the remaining cation gas, and ignites the focused cation gas for high-temperature combustion. The present invention relates to a burner that enables the heat treatment and a method for treating waste by high-temperature combustion using the burner.

  When processing waste, in order to improve heating efficiency and suppress harmful substances such as dioxin and asbestos, the processing temperature is set to an extremely high temperature of 2000 ° C. or higher. Although electric plasma makes it possible to set the processing temperature to 2000 ° C. or higher, there is a problem that the operating cost becomes expensive. On the other hand, combustion with kerosene or the like can be carried out using a burner and is cheaper than electric plasma, but it is very difficult to achieve the above processing temperature.

  Combustion with kerosene or the like can achieve a higher temperature as the supply amount of air necessary for combustion increases, and conversely, the temperature decreases as the supply amount of air decreases. However, when the amount is less than the required amount, incomplete combustion occurs, the amount of carbon monoxide generated increases, and there is a problem that it exceeds the environmental standards related to air pollution. In order to increase the combustion temperature, there is a method of preheating the supplied air. However, it is necessary to install a heat exchanger necessary for preheating air, and there is a problem that the installation space and cost are high.

  In view of these problems, there has been proposed a burner that can easily raise the combustion flame temperature without preheating the air and without increasing the air supply amount (see Patent Document 1). This burner is connected to the mixing cylinder on the inlet side of the mixing chamber with a double-structured air supply unit consisting of an outer cylinder and an inner cylinder, and the inner cylinder is provided with plasma generating means so that the air flowing in the inner cylinder The plasma flow is generated to generate a plasma flow, and swirl blades are arranged in a spiral shape between the outer cylinder and the inner cylinder, and the swirl flow wraps and converges the plasma flow. An injection nozzle is provided to inject fuel around the plasma flow in the mixing chamber and mix it into the swirling flow. Connect a tube to the mixing cylinder on the outlet side of the mixing chamber, form a combustion chamber in this tube, and penetrate the tube Thus, a spark plug is provided. Moreover, it has a plurality of magnets arranged on the outer periphery of the combustion cylinder so that the same pole exists around the combustion chamber.

It is known that the combustion temperature increases as the air pressure increases. This is because the amount of oxygen supplied increases as the air pressure increases. The burner has the advantage that the ion density is increased by converging the air flow, and it is not necessary to increase the air pressure and it is not necessary to add oxygen. Moreover, the combustion temperature can be further increased by converging the flame with a plurality of magnets. The burner wraps in a swirling flow to converge the plasma flow, but the converging plasma flow diffuses away from the swirling blades, so that there is a limit to the combustion temperature that can be raised. Therefore, although the combustion flame can be converged by a plurality of magnets and the flame temperature can be raised, it is difficult to control the magnetic field at a high temperature, and it is necessary to use a magnet that can be used at a high temperature. Further, since the swirl vanes are provided to generate the swirl flow and the internal plasma flow is wrapped with the swirl flow, there is a limit to reducing the size of the burner.
Japanese Patent No. 2819281

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an inexpensive burner that can achieve an ultra-high temperature of 2000 ° C. or higher using inexpensive kerosene or the like.

  The inventors of the present invention have made extensive studies in view of the above problems, and applied a high voltage to Kenzan to ionize air to generate a plasma flow, attract electrons from the plasma flow, and externally It has been found that an ultrahigh temperature of 2000 ° C. or higher can be achieved by focusing the cation gas remaining after the electrons are attracted by applying a magnetic field to the central axis and igniting the focused cation gas. This can be achieved by a burner having a simple structure including means for generating the plasma flow, means for focusing the cation gas by applying a magnetic field, and means for igniting the cation gas. Since this burner has a simple configuration, it can be provided at low cost. Therefore, the above object is achieved by providing this burner.

  That is, the burner of the present invention applies a voltage to a mixed gas in which fuel and air are mixed to turn the mixed gas into plasma, thereby generating a plasma gas in which cations and electrons are mixed, and Plasma gas generation means for attracting electrons, and magnetic field generation for generating a magnetic field (magnetic field) in a flow path through which the cation gas remaining after the electrons are attracted, and focusing the cation gas on one axis in the flow path The apparatus includes an apparatus and ignition means for igniting the focused cation gas.

  The plasma gas generation means includes a needle member having a plurality of sharp tips, a connection base for connecting the plurality of needle members, and a plasma generation current supply means for supplying a current to the connection base. Can do. This is because a positive voltage is applied to a needle member having a plurality of sharp tip parts, a high electric field is generated at the tip part, electrons in atoms and molecules are efficiently emitted (ionization), and cations and A plasma gas that is mixed with electrons and made electrically neutral as a whole is generated. Among these, electrons are attracted to the tip, and the remainder constitutes a cation gas containing cations.

  The magnetic field generator includes a plurality of coils arranged in parallel around a tube forming a flow path, a first ring member that connects one end of the plurality of coils, and a first ring that connects the other ends of the plurality of coils. It can be set as the structure containing the current supply means for magnetic field generation which supplies a 2 ring member and an electric current to a 1st ring member. In this configuration, a circuit is formed by the first ring member, the plurality of coils, the second ring member, and the magnetic field generating current supply means, and this is one axis of the flow path for the flow of the cation gas. An electromagnetic force directed to the central axis can be generated to focus the cation gas on the central axis.

  The magnetic field generator includes a plurality of magnets arranged so as to be arranged in the circumferential direction around a tube forming the flow path, and a plurality of connection members that magnetically connect two adjacent magnets. It can also be configured.

  The plurality of magnets are arranged around a tube forming a flow path so that N poles and S poles are alternately arranged in the circumferential direction toward the outer wall of the tube. The magnet in which the N pole is arranged toward the outer wall and the magnet in which the S pole is arranged can be connected by a connecting member.

  Further, a magnet set consisting of two magnets magnetically connected by a connecting member is arranged so as to face each other through a tube to constitute one circulating magnetic field generating means, and a plurality of these are arranged in the longitudinal direction of the tube. A plurality of orbiting magnetic field generating means may be provided, and the magnetic field generating device may be constituted by the plurality of orbiting magnetic field generating means.

  The present invention can provide a method for treating waste by high-temperature combustion. The method of the present invention applies a voltage to a mixed gas in which fuel and air are mixed to make the mixed gas into a plasma, thereby positively treating the mixed gas. A step of generating a plasma gas in which ions and electrons are mixed, a step of sucking electrons in the plasma gas, a magnetic field is generated in a flow path through which the cation gas remaining after the electrons are sucked, and the cation gas is Focusing on one axis in the flow path and igniting the focused cation gas to burn the waste.

  By providing the burner and combustion treatment method of the present invention, it is possible to achieve an ultra-high temperature of 2000 ° C. or higher using a fuel such as light oil, thereby reliably treating harmful substances such as dioxins and asbestos. be able to. By providing the burner of the present invention, it is possible to achieve a higher temperature than a conventional burner with a predetermined amount of fuel and air, so that the heating efficiency can be improved. Moreover, since it can focus on one axis | shaft, such as the center axis | shaft of a flow path, size reduction is possible and it can provide at low cost.

  The burner of the present invention applies a voltage to a mixed gas in which fuel and air are mixed to turn the mixed gas into plasma, thereby generating a plasma gas in which cations and electrons are mixed, and sucks electrons in the plasma gas. Plasma gas generating means, a magnetic field generating device for generating a magnetic field in a flow path through which a cation gas remaining after electrons are attracted, and focusing the cation gas on one axis in the flow path, and a focused cation gas And igniting means for igniting. Hereinafter, although the burner of this invention is demonstrated in detail with reference to drawings, it is not limited to embodiment described below.

  FIG. 1 is a diagram illustrating a burner according to the present invention. The plasma gas generation means 10 shown in FIG. 1 includes a needle member 12 having a plurality of sharp tip portions 11, a connection base 13 connecting the plurality of needle members 12, and a plasma generation current for supplying a current to the connection base 13. The supply means 14 is included. In the embodiment shown in FIG. 1, two plasma gas generation means 10 are provided opposite to each other, and a current is supplied from the plasma generation current supply means 14, and the mixed gas contacting the plurality of sharp tip portions 11 is positively supplied. A voltage is applied. In general, a steel pipe or the like is used as the pipe 15 and has conductivity. Therefore, the connection base 13 is disposed via the insulator 16. Here, by applying a positive voltage, an ionization (ionization) reaction represented by the following formula occurs around the sharp tip portion 11.

M represents an atom, M ⁺ represents a cation, and e ⁻ represents an electron. As shown in FIG. 1, when the plasma generation current supply means 14 applies a direct current and applies a positive voltage, the above reaction occurs, and most of the electrons e− are attracted to the needle member 12, and the connection base 13, current It flows through the supply means 14 to ground. The cation M + repels the needle member 12, penetrates into the mixed gas, and constitutes a cation gas.

  The plasma gas generation means 10 can use a sword mountain in which the needle member 12 is a metal needle and the connecting base 13 is a metal base. Note that the tip 11 is sharpened in order to obtain a strong electric field by obtaining electric field concentration. In addition to metal needles such as copper and iron, carbon nanotubes having a diameter of several nanometers to several tens of nanometers can also be used. The current supply means 14 may be either a direct current or an alternating current, but preferably supplies a direct current that can always attract electrons e−. Moreover, as shown in FIG. 1, by providing two plasma gas generation means 10 facing each other, more needle members 12 can attract electrons e- and generate more cations.

  A small part of the electrons that cannot be sucked into the needle member 12 and permeate into the mixed gas react with atoms and molecules in the mixed gas to generate anions. However, as a whole, the gas mixture is cationized. The cationized mixed gas is supplied as a cation gas to the flow path 21 provided with the magnetic field generator 20.

  The magnetic field generator 20 includes a plurality of coils 22 arranged in parallel around a tube 15 that forms a flow path 21 through which a cation gas flows, and a first ring member 23 that connects one end of the plurality of coils 22; The second ring member 24 connects the other ends of the plurality of coils 22, and a magnetic field generating current supply means 25 that supplies current to the first ring member 23. In FIG. 1, a circuit is formed by a first ring member 23, a plurality of coils 22, a second ring member 24, and a magnetic field generating current supply means 25. The first ring member 23 is disposed on the downstream side of the cation gas flow, and current is supplied from the magnetic field generating current supply means 25. The second ring member 24 is disposed on the upstream side of the cation gas flow.

  Here, the force which acts on cation gas is demonstrated with reference to FIG. 2 (a), (b). FIG. 2A is a front view, and FIG. 2B is a cross-sectional view taken along the cutting line AA. In order to effectively use the magnetic field generated from the coils, the plurality of coils 22 are provided on the outer periphery when the tube 15 is made of a nonmagnetic material such as aluminum, and on the inner periphery when the tube 15 is made of a ferromagnetic material such as iron. Adjacent to each other and arranged at almost equal intervals. The embodiment shown in FIG. 2 is an example in the case of the former nonmagnetic material. As shown by an arrow B, when a current flows in the order of the downstream first ring member 23, the plurality of coils 22, and the upstream second ring member 24, each coil has a concentric magnetic field centered on the coil. MF occurs. The magnetic field MF acts in the direction of the arrow C, and a magnetic field that circulates around the central axis of the flow path 21 is generated in the pipe 15 in the clockwise direction indicated by the arrow D. In the cation gas, an electromagnetic force acts in a direction indicated by an arrow E from the flow direction and the magnetic field direction toward the central axis of the flow path 21 and is focused on the central axis.

  Each coil 22 has a conducting wire arranged in a straight line, and a current flows through the conducting wire. The coil 22 can be provided as many as necessary to appropriately focus the cation gas, and can have an appropriate length. The magnetic field generating current supply means 25 needs to flow a current in a direction opposite to the direction in which the cation gas flows, and a means capable of supplying a direct current is essential.

  Referring to FIG. 1 again, the ignition means 30 ignites the focused cation gas by generating a spark or the like. The focused cation gas is highly densified and contains a large amount of fuel and oxygen, so that it burns effectively. For this reason, ultra-high temperature of 2000 degreeC or more can be achieved. The ignition means 30 may be anything as long as it can ignite the cation gas, and examples thereof include an ignition plug that generates sparks and ignites them. The ignition means 30 is disposed in a combustion furnace 31 connected to the pipe 15. Therefore, in the burner shown in FIG. 1, the plasma gas generating means 10 is disposed on the upstream side of the tube 15, the magnetic field generator 20 is disposed on the downstream side of the tube 15, and the combustion furnace 31 connected to the tube 15 is provided. An ignition means 30 is provided. The pipe 15 is provided with a branch upstream from the position where the plasma gas generating means 10 is disposed, and the fuel gas is supplied from one side and air is supplied from the other, mixed in the pipe 15, and supplied to the plasma gas generating means 10. Can be supplied.

  Here, the fuel can be any combustible substance. For example, methane gas, ethane gas, propane gas, butane gas, natural gas, city gas, liquid propane, liquid butane, gasoline, light oil, kerosene, heavy oil Can be mentioned. When supplying liquid fuel, it can be vaporized and gasified by a heat exchanger or the like. In the heat exchanger, the liquid fuel can be volatilized using, for example, combustion gas. Further, the air can be heated by another heat exchanger and the heated air can be supplied to the burner. Thus, heating efficiency can be further improved by using heated air.

  The tube 15 can be made from a suitable material depending on the temperature and pressure of the gas flowing through it. The tube 15 is preferably made of a material that has a constant magnetic field direction and is not magnetized by the generated magnetic field generator in order to appropriately focus the cation gas. For example, nonmagnetic stainless steel, copper, and aluminum can be mentioned. When using an inexpensive ferromagnetic material such as iron, it is necessary to devise how to apply the magnetic field in order to effectively use the magnetic field. Further, a pipe having an appropriate diameter can be used according to the gas flow rate. Since the combustion furnace 31 burns at an ultra-high temperature of 2000 ° C. or higher, it can be made of a material that can withstand an ultra-high temperature of 2000 ° C. or higher. For example, a refractory material such as a refractory brick can be used. In the combustion furnace 31, plastic materials containing chlorine such as vinyl chloride and waste such as asbestos harmful to the body are stored and burned at a combustion temperature of 2000 ° C. or more. In this manner, the generation of harmful substances such as dioxins is suppressed by burning chlorine-containing materials, asbestos and the like at an extremely high temperature.

  FIG. 3 is a diagram showing another embodiment (second embodiment) of a magnetic field generator used for a burner. The magnetic field generation device 40 magnetically connects a plurality of magnets 43 arranged in the circumferential direction to the inner periphery or outer periphery of the tube 42 forming the flow path 41 and two adjacent magnets 43. A plurality of connection members 44 are included. In the embodiment shown in FIG. 3, the magnet 43 a in which the N pole is arranged toward the outer wall of the tube 42 and the magnet 43 b in which the S pole is arranged toward the outer wall of the tube 42 are connected by one connecting member 44. Similarly, two magnets are connected to the back surface of the tube 42 by another connecting member, thereby constituting a circulating magnetic field generating means. The two magnets 43 connected by the connection member 44 constitute one magnet set, and one magnet set and the other magnet set are arranged so as to face each other via the tube 42. One rotating magnetic field generating means is configured.

  The magnet 43 is preferably disposed adjacent to the tube 42 in order to generate a magnetic field and to effectively apply an electromagnetic force to the cation gas. The connecting member 44 can be made of steel that is easily magnetized, and can be, for example, a steel strip. Thereby, two magnets can be magnetically connected, a line of magnetic force can be formed between the two magnets, and a magnetic field can be generated.

  With reference to FIG. 4, the force which a magnetic force acts on a cation gas flow in the magnetic field generator shown in FIG. 3 is demonstrated in detail. A cation gas flows in the tube 42 in the direction toward the paper surface, and a plurality of magnets 43 are arranged around the tube 42, and N and S poles are alternately arranged in the circumferential direction toward the outer wall of the tube 42. Arranged to arrange. The back surface of the N pole is the S pole, the back surface of the S pole is the N pole, and the S pole and the N pole of each back surface are magnetically connected by the connecting member 44 to form one magnet set. ing. In FIG. 4, one magnet set and another magnet set are arranged so as to face each other via the tube 42, and a magnetic field MF is generated from the N pole toward the S pole. In the magnet set shown in FIG. 4, the central angle formed by the two magnets 43 and the central shaft 45 is about 120 °. The magnetic field generated from the N pole of one magnet toward the S pole of the other magnet in one magnet set generates an electromagnetic force toward the central axis 45 with respect to the cation gas flow. The magnetic field generated from the north pole of one magnet in the set to the south pole of one neighboring magnet in the other magnet set is opposite to the direction toward the central axis 45 with respect to the cation gas flow. Generate electromagnetic force in the direction.

  Assuming that the center angle is about 120 ° as described above, the center formed by the north pole of one magnet in one magnet set, the south pole of one adjacent magnet in the other magnet set, and the center axis 45 The angle is about 60 °. In this case, the electromagnetic force generated by two magnets having a central angle of about 120 ° is larger than the electromagnetic force generated by two magnets having a central angle of about 60 °. Become. For this reason, the electromagnetic force which acts toward the central axis 45 as a whole is generated, and the cation gas can be focused on the central axis 45.

  When the central angles are 90 °, the electromagnetic force acting on the central axis 45 as a whole is canceled by the electromagnetic force repelling it. Therefore, in order to focus effectively, it is preferable that the central angle formed by the two magnets constituting one magnet set and the central axis 45 is larger than 90 °.

  FIG. 5 is a view showing still another embodiment (third embodiment) of the magnetic field generator used for the burner. FIG. 5A shows a front view, and FIG. 5B shows a plan view. The magnetic field generator shown in FIGS. 5A and 5B has a magnet set 50 composed of two magnets 43 connected by a connecting member 44 shown in FIG. It is configured by arranging a plurality of configured magnetic field generating means in the longitudinal direction of the tube 51. 5A and 5B, two sets of magnets 50 constitute one orbiting magnetic field generating means, and three such orbiting magnetic field generating means are arranged apart from each other in the longitudinal direction. ing. 5A and 5B, in order to clarify the positions where the magnets 52a, 52b, 52c, 52d, 53a, 53b, 53c, 53d, 54a, 54b, 54c, 54d are arranged. 3 is omitted, and each of the magnets 52a, 52b, 52c, 52d, 53a, 53b, 53c, 53d, 54a, 54b, 54c, 54d has no N pole and hatched lines. It is shown as S pole.

  5 (a) and 5 (b), the magnets 52a and 52b constituting one magnet set of the first orbiting magnetic field generating means and the magnets 52c and 52d constituting the other magnet set are represented by the second orbiting magnetic field. Magnets 53a and 53b constituting one magnet set of the generating means, and 53c and 53d constituting another magnet set are magnets 54a and 54b constituting one magnet set of the third orbiting magnetic field generating means, and Magnets 54c and 54d constituting one magnet set are shown. As shown in FIG. 5B, the magnets 53a, 53b, 53c, 53d of the second orbiting magnetic field generating means are respectively arranged at positions obtained by rotating the magnets of the first orbiting magnetic field generating means by 90 ° in the circumferential direction. The magnets 54a, 54b, 54c, 54d of the third orbiting magnetic field generating means are respectively arranged at positions obtained by rotating the magnets of the second orbiting magnetic field generating means by 90 ° in the circumferential direction. By arranging in this way, the electromagnetic force repelling by the first orbiting magnetic field generating means acts, and the cation gas flowing toward the inner wall of the pipe 51 is changed to the electromagnetic force toward the central axis by the second orbiting magnetic field generating means. It can be made to focus on the central axis. As described above, the cation gas can be focused on the central axis by arranging the magnets of the plurality of rotating magnetic field generating means at positions rotated by 90 ° in the circumferential direction.

  The present invention also provides a method for treating waste by high-temperature combustion. The method of the present invention will be described in detail with reference to FIG. Waste is stored in the combustion furnace 31. A voltage is applied to the needle member 12 through the connection base 13 by the plasma generation current supply means 14. A current is supplied to the first ring member 23 by the magnetic field generating current supply means 25, and the current flows through the plurality of coils 22 and the second ring member 24.

  Next, fuel and air are supplied to the pipe 15. For the air, the theoretical air amount is calculated from the oxygen amount required for the theoretical combustion of the fuel, and for example, the air can be supplied so as to be 5 to 20% excess. The fuel can be supplied by a pump if it is liquid, or by a compressor or blower if it is gas. It may be a cylinder (compression bottle) or a curdle (a supply device that frames and fixes a plurality of medium-sized containers). Air can be supplied by an air compressor or blower, which can be supplied from a cylinder or a cardle as well.

  Fuel and air are mixed in the tube 15 and a voltage is applied by the plasma gas generating means to turn the mixed gas into plasma, thereby generating a plasma gas in which cations and electrons are mixed. When the voltage is positive, most of the plasma gas is attracted to the positive electrode and constitutes a cation gas. Further, a circulating magnetic field is generated in the tube 15, and the cation gas is focused on the central axis by the electromagnetic force acting on the central axis of the flow path by this magnetic field. The focused cation gas enters the combustion furnace 31 while being focused, and is ignited by an electric spark or the like generated by the ignition means 30, and the waste contained in the combustion furnace 31 is burned.

  So far, the burner of the present invention has been described with reference to the drawings, but any other material can be used as long as it can generate a magnetic field in addition to a coil and a magnet, for example, an electromagnet. it can. The plasma gas generating means can be, for example, a plasma generating means, and any known plasma generating means can be used as the plasma generating means. Furthermore, the ignition means may be anything as long as it can ignite the fuel gas by generating an electric spark or the like. Since the burner of the present invention can focus the plasma gas on the central axis and increase the density, the diameter of the tube can be reduced, thereby enabling high-temperature combustion and reducing the size of the burner. Is possible.

The figure which illustrated the burner of this invention. The figure which showed the force which acts with the magnetic field generator shown in FIG. The figure which showed another embodiment of the magnetic field generator used for the burner of this invention. The figure which showed the force which acts with the magnetic field generator shown in FIG. The figure which showed further another embodiment of the magnetic field generator used for the burner of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Plasma gas generation means, 11 ... Tip part, 12 ... Needle member, 13 ... Connection stand, 14 ... Current supply means for plasma generation, 15 ... Pipe, 16 ... Insulator, 20 ... Magnetic field generator, 21 ... Flow path , 22 ... coil, 23 ... first ring member, 24 ... second ring member, 25 ... current supply means for magnetic field generation, 30 ... ignition means, 31 ... combustion furnace, 40 ... magnetic field generator, 41 ... flow path, 42 ... pipe, 43, 43a, 43b ... magnet, 44 ... connecting member, 45 ... central axis, 50 ... magnet set, 51 ... pipe, 52a, 52b, 52c, 52d, 53a, 53b, 53c, 53d, 54a, 54b, 54c, 54d ... Magnet

Claims (7)

  Plasma gas generating means for applying a voltage to a mixed gas in which fuel and air are mixed to turn the mixed gas into plasma, generating a plasma gas in which cations and electrons are mixed, and sucking the electrons in the plasma gas And a magnetic field generator for generating a magnetic field (magnetic field) in a flow path through which the cation gas remaining after the electrons are attracted and focusing the cation gas on one axis in the flow path, and the focused cation gas And a burner.   The plasma gas generation means includes a needle member having a plurality of sharp tips, a connection base connecting the plurality of needle members, and a plasma generation current supply means for supplying a current to the connection base. Item 10. The burner according to Item 1.   The magnetic field generator includes a plurality of coils arranged in parallel around a tube forming the flow path, a first ring member connecting one end of the plurality of coils, and the other end of the plurality of coils. A second ring member to be coupled; and a magnetic field generating current supply means for supplying a current to the first ring member, the first ring member, the plurality of coils, the second ring member, and the magnetic field generating current. The burner according to claim 1 or 2, wherein a circuit is formed by the supply means.   The magnetic field generator includes a plurality of magnets arranged so as to be arranged in a circumferential direction around a tube forming the flow path, and a plurality of connection members that magnetically connect the two adjacent magnets. The burner according to claim 1 or 2, comprising.   The plurality of magnets are arranged around the tube forming the flow path so that N poles and S poles are alternately arranged in the circumferential direction toward the outer wall of the tube, and toward the outer wall of the tube. The burner according to claim 4, wherein a magnet on which an N pole is arranged and a magnet on which an S pole is arranged are connected by the connecting member.   A magnet set composed of two magnets magnetically connected by the connecting member is arranged so as to face each other through the tube to constitute a circulating magnetic field generating means, and a plurality of magnet sets are arranged in the longitudinal direction of the tube. The burner according to claim 4 or 5, wherein the burner is arranged to constitute a plurality of the rotating magnetic field generating means. A method for treating waste by high-temperature combustion,
Applying a voltage to a mixed gas in which fuel and air are mixed to turn the mixed gas into a plasma, and generating a plasma gas in which cations and electrons are mixed; and
Sucking the electrons in the plasma gas;
Generating a magnetic field in a flow path through which the cation gas remaining after the electrons are attracted, and focusing the cation gas on one axis in the flow path;
Igniting the focused cation gas and combusting the waste.

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