A high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt

Abstract

A fluorine-containing, chlorine-containing and salt-containing solid-liquid high-temperature melting incinerator, comprising an incinerator (10), a Venturi mixer (5) and a melting furnace (3) arranged in sequence from top to bottom. A hot blast stove (2) arranged horizontally is connected to the bottom of the melting furnace (3); the inside of the furnace body of the melting furnace (3) is a molten pool, and a combined burner (8) for injecting fluorine-containing, chlorine-containing and salt-containing waste liquid and auxiliary fuel for combustion, a spoiler (7) for injecting turbulent oxygen and a slag discharge port (6) are successively arranged from top to bottom; the Venturi mixer (5) successively includes a contracted lower cone section, a reduced diameter section and an expanded upper cone section from bottom to top. A solid waste feeder (4) is arranged on the lower cone section, and a medium-speed air nozzle (9) for injecting oxygen and water vapor is arranged on the reduced diameter section; an outlet flue (11) is arranged at the top of the incinerator (10). The present invention uses a vertical closed adiabatic high-temperature melting incinerator to completely incinerate fluorine-containing and chlorine-containing organic substances and form a melt from salt-containing residues.

Description

Technical Field

[0001] The present invention relates to a high-temperature melting incinerator, in particular to a solid-liquid high-temperature melting incinerator containing fluorine, chlorine and salt. Background Art

[0002] At present, the melting furnaces in the hazardous waste industry mainly include plasma, resistive and fuel types, which mainly treat slag and fly ash. When treating solid-liquid hazardous waste with high fluorine, chlorine and salt content, the operation cost and maintenance cost are too high, and the continuous operation time is too short. The main deficiencies are as follows:

[0003] (1) The problem of corrosion of refractory materials cannot be solved: At present, the main block solid incinerators include rotary kilns, fixed beds, fluidized beds, and grate furnaces. Among them, the most commonly used rotary kiln is a rotating furnace. In these incinerators, the materials with high fluorine, chlorine and salt content are in direct contact with the refractory materials, which is easy to cause erosion and corrosion of the refractory materials. The grate furnace has a moving metal grate and air leakage, and the corrosion is more serious;

[0004] (2) The problem of slagging and erosion of materials cannot be solved: Since the materials contain salt, the operating temperature cannot reach the hazardous waste incineration temperature, otherwise low-melting-point salts are likely to coke and block the bed layer and flue.

[0005] The amount of solid-liquid hazardous waste containing high fluorine, chlorine and salt to be treated in China is large and the harmfulness is high. There is an urgent need to develop an industrial technology to completely harmlessize and even recycle this hazardous waste. Summary of the Invention

[0006] The technical problem solved by the present invention is: overcoming the deficiencies of the prior art, providing a solid-liquid high-temperature melting incinerator containing fluorine, chlorine and salt, solving the problems of difficult feeding and strong corrosiveness of solid materials containing fluorine and chlorine, and solving the problem of easy slagging and erosion of materials containing fluorine, chlorine and salt.

[0007] The technical solution of the present invention is:

[0008] A solid-liquid high-temperature melting incinerator containing fluorine, chlorine and salt, comprising an incinerator, a Venturi mixer and a melting furnace arranged in sequence from top to bottom. The bottom of the melting furnace is connected to a horizontally arranged hot blast stove; the inside of the melting furnace body is a molten pool, and a combined burner for spraying waste liquid containing fluorine, chlorine and salt and auxiliary fuel for combustion, a spoiler for spraying turbulent oxygen and a slag discharge port are arranged in sequence from top to bottom; the Venturi mixer sequentially includes a contracted lower cone section, a constriction section and an expanded upper cone section from bottom to top. The lower cone section is provided with a solid waste feeder, and the constriction section is provided with a medium-speed air nozzle for spraying oxygen and steam; an outlet flue is arranged at the top of the incinerator.

[0009] Preferably, the number of the combined burners is 3. The vertical heights of the nozzles of the three combined burners are the same, and they are circumferentially distributed along the side wall of the molten pool. The jet direction of the nozzles of the combined burners is inclined downward, and the projection of the jet direction of the nozzles on the horizontal plane is tangent to the imaginary inscribed circle centered at the center of the melting furnace.

[0010] Preferably, the turbulator includes three high-speed turbulence spray guns. The vertical heights of the three high-speed turbulence spray guns are the same, and they are circumferentially distributed along the side wall of the molten pool. The jet direction of the high-speed turbulence spray guns is inclined downward, and the projection of the jet direction of the spray guns on the horizontal plane is tangent to the imaginary inscribed circle centered at the center of the melting furnace.

[0011] Preferably, the number of the medium-speed air nozzles is 4. The vertical heights of the four medium-speed air nozzles are the same, and they are circumferentially distributed along the inner wall of the constriction section of the Venturi mixer. The jet direction of the medium-speed air nozzles is inclined upward, and the projection of the jet direction on the horizontal plane is tangent to the imaginary inscribed circle centered at the center of the Venturi mixer.

[0012] Preferably, the outlet flue gas temperature T1 of the hot blast stove belongs to [1100°C, 1300°C], the oxygen content a1 belongs to [8%, 13%], and the outlet flue gas flow velocity V1 belongs to [50 m / s, 60 m / s].

[0013] Preferably, the height difference H1 between the axis of the hot blast stove and the bottom of the molten pool of the melting furnace satisfies the following expression:

[0014] H1 = α1·H

[0015] H = α2·m / (3ρπR) 2

[0016] Where α1 is the solid material filling height coefficient, H is the theoretical height of the solid material for a single feed, α2 is the solid material repose coefficient, m is the weight of the solid material for a single feed, ρ is the density of the solid material, π is the constant of the circumference ratio, and R is the effective radius of the molten pool of the melting furnace.

[0017] Preferably, the height difference H2 between the nozzle of the turbulator and the bottom of the molten pool of the melting furnace satisfies the following expression:

[0018] H2 = α3·H1, α3 ∈ [0.8, 2].

[0019] Preferably, the height difference H3 between the nozzle of the combined burner and the bottom of the molten pool of the melting furnace satisfies the following expression:

[0020] H3 = α4·H2, α4 ∈ [2, 3].

[0021] Preferably, the bottom of the molten pool is an inclined plane, and the included angle β with the horizontal plane belongs to [3°, 6°].

[0022] Preferably, the flame deflection angle α∈[45°, 60°] of the outlet flue.

[0023] The advantages of the present invention compared with the prior art are:

[0024] (1) The fluorine-containing, chlorine-containing, and salt-containing solid-liquid high-temperature melting incinerator of the present invention adopts a vertical closed adiabatic high-temperature incinerator to completely incinerate fluorine-containing and chlorine-containing organic matter, thereby reducing the corrosion of fluorine and chlorine to refractory materials in an adiabatic closed high-temperature environment;

[0025] (2) The fluorine-containing, chlorine-containing, and salt-containing solid-liquid high-temperature melting incinerator of the present invention utilizes the calorific value of the fluorine-containing, chlorine-containing, and salt-containing solid and liquid wastes to release heat in the melting furnace environment to form a molten body for discharge. The harmless glass formed by water extraction of the molten body can be utilized as a resource;

[0026] (3) The fluorine-containing, chlorine-containing, and salt-containing solid-liquid high-temperature melting incinerator of the present invention adopts a combined burner of fluorine-containing, chlorine-containing, and salt-containing waste liquid and auxiliary fuel, and a high-speed turbulent oxygen is arranged between the solid material and the combined burner to provide sufficient turbulent oxygen and high-temperature flue gas to ensure thorough incineration while ensuring the formation of a molten body at the bottom of the molten pool;

[0027] (4) The fluorine-containing, chlorine-containing, and salt-containing solid-liquid high-temperature melting incinerator of the present invention uses a high-temperature and high-speed hot blast furnace to generate high-temperature and high-speed oxygenated flue gas to blow and burn the materials falling into the bottom of the melting furnace, thereby ensuring the melting temperature of the molten pool and ensuring sufficient contact between the solid materials and oxygen;

[0028] (5) The fluorine-containing, chlorine-containing, and salt-containing solid-liquid high-temperature melting incinerator of the present invention adopts a Venturi-type mixer, the configuration of which enhances the mixing of high-temperature flue gas in the molten pool, ensures the temperature and heat required for melting of solid materials, and ensures that the residue forms a molten body;

[0029] (6) The fluorine-containing, chlorine-containing, and salt-containing high-temperature melting incinerator of the present invention has tangential medium-speed air nozzles arranged around the venturi mixer neck to ensure that the solid materials are volatilized without timely replenishment of oxygen during the descent process and thus are not completely burned. This ensures that the materials are fully and thoroughly burned in the furnace and that the fluorine and chlorine elements in the flue gas are converted into catalytic elements to ensure that the flue gas after incineration does not form elemental fluorine and chlorine gases. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the fluorine-containing, chlorine-containing, and salt-containing solid-liquid high-temperature melting incinerator of the present invention;

[0031] Figure 2 It is a schematic top view of the structure of the fluorine-containing, chlorine-containing, and salt-containing solid-liquid high-temperature melting incinerator of the present invention;

[0032] Figure 3Schematic diagram of the layout of the high-speed turbulator 7 of the fluorine, chlorine and salt-containing solid-liquid high-temperature melting incinerator of the present invention;

[0033] Figure 4 Schematic diagram of the layout of the combined burner 8 of the fluorine, chlorine and salt-containing solid-liquid high-temperature melting incinerator of the present invention;

[0034] Figure 5 Schematic diagram of the layout of the medium-speed air nozzle 9 in the fluorine, chlorine and salt-containing solid-liquid high-temperature melting incinerator of the present invention. Detailed implementation manners

[0035] In order to better understand the above technical solutions, the technical solutions of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. Without conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0036] Figure 1 、 Figure 2 Fig. shows a preferred embodiment of a fluorine, chlorine and salt-containing solid-liquid high-temperature melting incinerator provided by the present invention, which includes an incinerator 10, a Venturi mixer 5 and a melting furnace 3 arranged in sequence from top to bottom. The bottom of the melting furnace 3 is connected to a horizontally arranged high-temperature and high-speed hot blast furnace 2.

[0037] The connection body of the melting furnace 3, the Venturi mixer 5 and the incinerator 10 forms a vertical closed adiabatic incineration environment.

[0038] The high-temperature and high-speed hot blast furnace 2 is used to form high-temperature and high-speed oxygen-rich flue gas and spray it into the bottom of the melting furnace 3; the melting furnace 3 is used to heat and burn the fluorine, chlorine and salt-containing solid materials and waste liquid, and use the heat released by the combustion of fluorine and chlorine-containing organic substances to make the salt-containing residue burn to form a high-temperature melt and discharge; the Venturi mixer 5 is used to put in the fluorine, chlorine and salt-containing solid materials, enhance the combustion effect of the melting furnace 3, supplement oxygen and provide a catalyst for the conversion of fluorine and chlorine elements; the volatile matter generated by the descent of the fluorine, chlorine and salt-containing solid materials and the organic substances that may not be completely burned in the molten pool enter the incinerator 10 with the flue gas for incineration and discharge.

[0039] The high-temperature and high-speed hot blast furnace 2 includes a hot blast furnace burner 1 and a high-pressure Roots blower; the high-temperature flue gas generated by the combustion of the hot blast furnace burner 1 forms high-temperature and high-speed oxygen-rich flue gas under the action of the high-pressure air generated by the high-pressure Roots blower and is sprayed into the bottom of the melting furnace 3.

[0040] In a specific embodiment, the auxiliary fuel burned by the hot blast furnace burner 1 is diesel, and a high-energy igniter and a high-efficiency diesel spray gun are equipped for the corresponding diesel burner.

[0041] In a specific embodiment, the tail of the high-temperature and high-speed hot blast stove 2 is connected to the bottom of the melting furnace 3 through a flange.

[0042] Specifically, the flue gas temperature T1, oxygen content α1, and height difference H1 between the high-temperature and high-speed hot blast stove 2 and the bottom of the molten pool are determined according to the characteristics and feed rate of the fluorine, chlorine, and salt-containing solid-liquid hazardous waste materials. In view of the characteristics of the fluorine, chlorine, and salt-containing solid-liquid hazardous waste, the outlet flue gas temperature T1 of the high-temperature and high-speed hot blast stove 2 ∈ [1100 °C, 1300 °C], oxygen content a1 ∈ [8%, 13%], outlet flue gas velocity V1 ∈ [50 m / s, 60 m / s], H = α2 · m / 3ρπR 2 , H1 = α1 · H, where α1 is the solid material filling height coefficient, H is the theoretical height of the single-feed solid material, α2 is the solid material repose coefficient, m is the weight of the single-feed solid material, ρ is the density of the solid material, π is the constant of the circumference ratio, and R is the effective radius of the molten pool of the melting furnace. The high-temperature and high-speed hot blast stove 2 forms high-temperature and high-speed oxygen-rich flue gas to blow and burn the solid materials at the bottom of the melting furnace, ensuring the combustion temperature and the sufficient contact between the solid materials and oxygen.

[0043] The furnace body of the melting furnace 3 is composed of metal materials and refractory materials. The inside of the furnace body is a molten pool, and a combined burner 8, a high-speed turbulator 7, and a slag discharge port 6 are arranged on the side wall from top to bottom.

[0044] The bottom of the molten pool is an inclined plane, and the included angle β with the horizontal plane ∈ [3°, 6°]. β is mainly determined according to the melting point of the slag cushion layer and the feed rate, so that the fluorine, chlorine, and salt-containing solid materials gather at the lower part of the inclined plane at the bottom of the molten pool.

[0045] The high-speed turbulator 7 is arranged on the upper layer of the solid materials at the bottom of the melting furnace 3. In a specific embodiment, as Figure 3 shown, it includes three high-speed turbulence spray guns. The vertical heights of the 3 high-speed turbulence spray guns are the same and are distributed circumferentially along the side wall of the molten pool. The spraying directions of the high-speed turbulence spray guns are inclined downward, and the included angle with the horizontal plane is 10° - 15°. The inclination angle is determined according to the material characteristics. The projection of the spraying direction of the nozzle on the horizontal plane is tangent to the imaginary inscribed circle with the center of the melting furnace 3 as the center, and the imaginary circle is biased towards the slag discharge port 6. It approximately forms a four-corner tangential circle form with the high-temperature and high-speed oxygen-rich flue gas sprayed by the high-temperature and high-speed hot blast stove 2 at the bottom. This kind of hot flue gas flowing tangentially from bottom to top with a certain eccentricity forms a flow field similar to a tornado in the melting furnace 3.

[0046] The height difference H2 between the nozzle of the high-speed turbulator 7 and the bottom of the molten pool of the melting furnace 3 satisfies the following expression: H2 = α3 · H1, a3 ∈ [0.8, 2], and a3 is mainly determined according to the ignition temperature of the material, the residual carbon content, and the solid material processing amount.

[0047] The combined burner 8 is arranged above the high-speed spoiler 7. In a specific embodiment, as Figure 4 shown, the number of the combined burners 8 is 3. The vertical heights of the nozzles of the three combined burners 8 are the same and are circumferentially distributed along the side wall of the molten bath. The jet direction of the nozzles of the combined burner 8 is inclined downward, and the included angle between the jet direction and the horizontal plane is 15°-20°. The inclination angle is determined according to the solid material processing amount and the characteristics of the solid material, in combination with the size of the melting furnace 3. The projection of the jet direction of the nozzle on the horizontal plane is tangent to the imaginary inscribed circle with the center of the melting furnace 3 as the center.

[0048] The combined burner 8 includes an auxiliary fuel nozzle, a fluorine, chlorine and salt-containing waste liquid nozzle and a corresponding automatic ignition monitoring system. In this embodiment, the auxiliary fuel is diesel. Under the action of the high-speed spoiler 7, the fluorine, chlorine and salt-containing waste liquid and diesel undergo a violent exothermic combustion reaction. The high-speed oxygen ejected by the high-speed spoiler 7 further entrains the high-temperature flue gas generated by the combustion of the combined burner 8 to heat and burn the fluorine, chlorine and salt-containing solid materials. The heat released by the combustion of the fluorine, chlorine and salt-containing solid materials and the waste liquid itself is used to heat the salt-containing residue into a molten state to form a high-temperature melt. The flue gas after combustion flows in the molten bath as shown by the dotted line in Figure 1 , which improves the residence time of the high-temperature flue gas in the molten bath and strengthens the complete combustion of the fluorine, chlorine and salt-containing solid materials.

[0049] The height difference H3 between the nozzle of the combined burner 8 and the bottom of the molten bath of the melting furnace 3 satisfies the following expression: H3 = α4·H2, where α4 ∈ [2, 3], and α4 is mainly determined according to the type of auxiliary fuel and the physical properties and processing amount of the fluorine, chlorine and salt-containing waste liquid.

[0050] The slag discharge port 6 is horizontally arranged at the bottom of the melting furnace 3 and is used to discharge the high-temperature melt formed by combustion. The slag discharge port 6 and the high-temperature high-speed hot blast stove 2 are located on both sides of the melting furnace 3. The discharged high-temperature melt is further discharged into a wet water extraction slag machine to form a vitreous body, achieving the effect of resource utilization.

[0051] The Venturi mixer 5 includes a solid waste feeder 4 and a medium-speed air nozzle 9. The Venturi mixer 5 successively includes a lower conical section, a constriction section and an upper conical section from bottom to top. The lower conical section is a contraction channel with a decreasing cross-sectional area, the upper conical section is an expansion channel with an increasing cross-sectional area, and the cross-sectional area of the constriction section is the smallest. The lower conical section is connected to the melting furnace 3, and the upper conical section is connected to the incinerator 10. The contraction section of the lower conical section enhances the mixing of the high-temperature flue gas in the molten bath of the melting furnace 3 and ensures the temperature and heat required for the melting of the fluorine, chlorine and salt-containing solid materials.

[0052] The solid waste feeder 4 is located in the lower conical section of the Venturi mixer 5, and the fluorine-containing, chlorine-containing and salt-containing solid materials fall into the bottom of the molten pool through the solid waste feeder 4. The medium-speed wind nozzle 9 is located in the necking section of the Venturi mixer 5, and sprays oxygen and water vapor to provide oxygen for the volatilized part of the fluorine-containing, chlorine-containing and salt-containing solid materials during their descent to enable them to burn fully, thereby ensuring that the materials are fully and thoroughly burned in the furnace; at the same time, a catalyst is provided to reduce the fluorine and chlorine elements in the flue gas, thereby reducing the corrosion of the refractory materials of the furnace wall.

[0053] The angle between the projections of the solid waste feeder 4 and the slag discharge port 6 on the horizontal plane and the axis line of the melting furnace 3 is 90°, so that the fluorine-containing, chlorine-containing and high-salt solid materials fall to the lowest point of the inclined surface at the bottom of the molten pool.

[0054] In a specific embodiment, if Figure 5 As shown, the number of the medium-speed air nozzles 9 is 4, which are arranged circumferentially in a four-corner tangential circle. Specifically, the vertical heights of the four medium-speed air nozzles 9 are the same, and they are distributed circumferentially along the inner wall of the contraction section of the Venturi mixer 5. The injection direction of the medium-speed air nozzle 9 is inclined upward, and the injection direction forms an angle of 25° to 35° with the horizontal plane. The projection of the injection direction on the horizontal plane is tangent to an imaginary inscribed circle with the center of the Venturi mixer 5 as the center.

[0055] In a specific embodiment, the Venturi mixer 5 and the melting furnace 3 and the incinerator 10 and the Venturi mixer 5 use a corrosion-resistant and high-temperature resistant detachable flange connection. Specifically, the flange is connected by bolts, and a corrosion-resistant and high-temperature resistant sealing device is set at the connection. The sealing device is fixed and insulated by combining high-temperature ceramic fiber felt and refractory materials, and is fixed by bolts. Considering that the melting furnace is prone to various problems during commissioning and use, resulting in the need for equipment maintenance, the detachable structure ensures the convenience of equipment maintenance, reduces the use of refractory materials, and reduces the cost of equipment investment and maintenance.

[0056] The top of the incinerator 10 is provided with a laterally inclined outlet flue 11, and the volatile matter generated by the descent of the fluorine-containing, chlorine-containing and salt-containing solid materials and the organic matter that may not be completely burned in the molten pool enter the incinerator 10 with the flue gas to be burned and discharged.

[0057] Specifically, the outlet flue 11 and the high-temperature and high-speed hot blast stove 2 are located on both sides of the furnace body, arranged facing each other, and their projections on the horizontal plane are symmetric about the axis of the furnace body. The outlet flue and the incinerator 10 form a flame-reflecting angle α with a large cone angle for free transition, where the flame-reflecting angle α ∈ [45°, 60°], which is determined according to the ash content of the fluorine, chlorine, and salt-containing solid materials, the fly ash melting point after high-temperature combustion of the materials, and the simulation of the flue gas flow field. Based on the fitting relationship parameters between the theoretical simulation calculation values and the actual operation experience, the rationality of the flue gas flow field is ensured while preventing ash accumulation and coking of the flue gas fly ash.

[0058] The present invention mainly utilizes the heat released by the combustion of fluorine, chlorine, and salt-containing organic substances in fluorine, chlorine, and salt-containing solid and liquid hazardous wastes to heat the remaining salt-containing residues, heats the salt-containing residues to a molten state and discharges them into the water extraction slag machine to form glass bodies, realizing resource utilization. The melting furnace is designed based on the solid material combustion theory. From the theoretical basis of combustion reaction kinetics, it ensures the oxygen and temperature required for sufficient high-temperature ignition and combustion of the materials, and at the same time ensures the time for the oxygen required for the diffusion combustion of the materials entering the furnace each time to penetrate and burn. The specific working process is as follows:

[0059] The fluorine, chlorine, and salt-containing solid materials enter from the solid waste feeder 4 and fall to the bottom of the molten pool of the melting furnace 3. The high-temperature and high-speed oxygen-containing flue gas generated by the high-temperature and high-speed hot blast stove 2 blows the solid materials to burn. The solid materials are simultaneously tangentially blown by the high-speed oxygen ejected by the high-speed turbulator 7 and rotate at the bottom of the molten pool. At the same time, under the action of the high-speed turbulator 7, the fluorine, chlorine, and salt-containing waste liquid and diesel in the combined burner 8 undergo a violent exothermic combustion reaction to generate high-temperature flue gas. The high-speed oxygen ejected by the high-speed turbulator 7 further entrains the high-temperature flue gas generated by the combustion of the combined burner 8, forming a flow field similar to a tornado in the melting furnace 3 to fully heat and burn the fluorine, chlorine, and salt-containing solid materials and waste liquid. The heat released by the combustion of the fluorine, chlorine, and salt-containing solid materials and waste liquid using their own calorific value is used to heat the salt-containing residues to a molten state, forming a high-temperature melt. The high-temperature melt is discharged through the slag discharge port 6 and further discharged into the wet water extraction slag machine to form glass bodies. The flue gas flows upward to the Venturi mixer 5, and the medium-speed air nozzle 9 ejects oxygen and water vapor. The ejected oxygen supplements the combustion of the volatile part during the falling process of the solid materials, ensuring the full and thorough incineration of the materials in the furnace. The ejected water vapor catalyzes the conversion of fluorine and chlorine monomers in the flue gas, ensuring that the flue gas after incineration does not form elemental fluorine and chlorine gases. The volatile components generated by the descent of the fluorine, chlorine, and salt-containing solid materials and the organic substances that may not be fully burned in the molten pool enter the incinerator 10 with the flue gas and are discharged through the outlet flue 11 after incineration.

[0060] The content not described in detail in the specification of the present invention belongs to the well-known technology in the art.

Claims

1. A high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt, characterized in that: It includes an incinerator (10), a Venturi mixer (5), and a melting furnace (3) arranged successively from top to bottom. A hot blast stove (2) arranged horizontally is connected to the bottom of the melting furnace (3). The interior of the furnace body of the melting furnace (3) is a molten pool, and a combined burner (8) for injecting fluorine, chlorine, and salt-containing waste liquid and auxiliary fuel for combustion, a spoiler (7) for injecting turbulent oxygen, and a slag discharge port (6) are successively arranged from top to bottom. The Venturi mixer (5) successively includes a contracted lower conical section, a constriction section, and an expanded upper conical section from bottom to top. A solid waste feeder (4) is arranged on the lower conical section, and a medium-speed air nozzle (9) for injecting oxygen and steam is arranged on the constriction section. An outlet flue (11) is arranged at the top of the incinerator (10).

2. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to claim 1, characterized in that, The number of the combined burners (8) is 3. The vertical heights of the nozzles of the three combined burners (8) are the same and are circumferentially distributed along the side wall of the molten pool. The injection direction of the nozzles of the combined burners (8) is inclined downward, and the projection of the injection direction on the horizontal plane is tangent to an imaginary inscribed circle centered at the center of the melting furnace (3).

3. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to claim 2, characterized in that, The spoiler (7) includes three high-speed turbulent injection guns. The vertical heights of the three high-speed turbulent injection guns are the same and are circumferentially distributed along the side wall of the molten pool. The injection direction of the high-speed turbulent injection guns is inclined downward, and the projection of the injection direction on the horizontal plane is tangent to an imaginary inscribed circle centered at the center of the melting furnace (3).

4. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to claim 3, characterized in that, The number of the medium-speed air nozzles (9) is 4. The vertical heights of the four medium-speed air nozzles (9) are the same and are circumferentially distributed along the inner wall of the constriction section of the Venturi mixer (5). The injection direction of the medium-speed air nozzles (9) is inclined upward, and the projection of the injection direction on the horizontal plane is tangent to an imaginary inscribed circle centered at the center of the Venturi mixer (5).

5. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to claim 4, characterized in that, The outlet flue gas temperature T1 of the hot blast stove (2) ∈ [1100°C, 1300°C], the oxygen content a1 ∈ [8%, 13%], and the outlet flue gas flow velocity V1 ∈ [50 m / s, 60 m / s].

6. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to claim 5, characterized in that, The height difference H1 between the axis of the hot blast stove (2) and the bottom of the molten pool of the melting furnace (3) satisfies the following expression: H1 = α1·H H = α2·m / 3ρπR 2 Where α1 is the solid material filling height coefficient, H is the theoretical height of the single-feed solid material, α2 is the solid material repose coefficient, m is the weight of the single-feed solid material, ρ is the density of the solid material, π is the constant of the circumference ratio, and R is the effective radius of the molten pool of the melting furnace (3).

7. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to claim 6, characterized in that, The height difference H2 between the nozzle of the spoiler (7) and the bottom of the molten pool of the melting furnace (3) satisfies the following expression: H2 = α3·H1, a3 ∈ [0.8, 2].

8. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to claim 7, characterized in that, The height difference H3 between the nozzle of the combined burner (8) and the bottom of the molten pool of the melting furnace (3) satisfies the following expression: H3 = α4·H2, a4 ∈ [2, 3].

9. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to any one of claims 1 to 8, characterized in that, The bottom of the molten pool is an inclined plane, and the included angle β with the horizontal plane ∈ [3°, 6°].

10. The high-temperature molten incinerator for solid-liquid containing fluorine, chlorine and salt according to any one of claims 1 to 8, characterized in that, The outlet flue and the incinerator form a reflame angle α with a large cone angle for free transition, and the reflame angle α ∈ [45°, 60°].

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