Radioactive waste treatment device

Abstract

The utility model relates to a radioactive waste treatment device. The treatment device comprises a melting furnace, a plasma starting assembly, a water vapor supply assembly and an induction melting assembly. A furnace starting additive is contained in the melting furnace. The plasma starting assembly is arranged at the inlet position of the melting furnace. The water vapor supply assembly is connected with the plasma starting assembly through a pipeline and used for providing water vapor for the plasma starting assembly. The induction melting assembly comprises an induction coil wound on the outer wall of the melting furnace. The plasma starting assembly is used for firstly heating the furnace starting additive, on one hand, the furnace starting additive becomes a high-temperature seed zone, on the other hand, the furnace starting additive can conduct electricity at the high temperature, and the conductive furnace starting additive can be heated under the action of a magnetic field of the induction melting assembly. Compared with the mode that the furnace starting additive is heated only through the plasma starting assembly, the heating mode of the induction melting assembly is relatively uniform.

Description

Technical Field

[0001] The present application relates to the technical field of radioactive waste treatment, and in particular to a radioactive waste treatment device. Background Art

[0002] A large amount of radioactive waste is generated during the production and decommissioning of the nuclear industry. Traditional cement solidification methods are gradually unable to meet the requirements of stable treatment of radioactive waste and volume reduction of solidified bodies.

[0003] In the related technology, plasma treatment technology is generally used, specifically: using thermal plasma with a temperature of up to 10K as a heat source to melt and pyrolyze all combustible, difficult to burn, and non-combustible solid (or organic solvent) wastes. The energy density of thermal plasma is high, and it can melt inorganic wastes and pyrolyze and gasify organic wastes in a short time.

[0004] However, since plasma is generally sprayed into a fixed position in the melting furnace in a jet manner, it can only achieve local rapid heating of the waste, which can easily lead to uneven temperature distribution in the melting furnace and poor radioactive waste treatment effect. Summary of the invention

[0005] Based on this, it is necessary to provide a radioactive waste treatment device to address the problem of poor radioactive waste treatment effect.

[0006] A radioactive waste treatment device, comprising:

[0007] A melting furnace, the melting furnace being used to contain a furnace start-up additive;

[0008] A plasma starting component, disposed at the entrance of the melting furnace, for heating the furnace starting additive in the melting furnace;

[0009] a water vapor supply component connected to the plasma starting component through a pipeline, and used for providing water vapor to the plasma starting component; and

[0010] The induction melting component comprises an induction coil wound on the outer wall of the melting furnace. The induction coil is used to generate an electromagnetic field in the melting furnace after being energized to heat the furnace start-up additive.

[0011] In one of the embodiments, the furnace wall of the melting furnace is a double-layer water-cooled jacket structure, and the processing device includes a cooling system, which is connected to the double-layer water-cooled jacket structure of the melting furnace.

[0012] In one embodiment, the plasma starting assembly includes a plurality of single-jet plasma torches and a mixing chamber, one end of the mixing chamber along the axial direction extends from the entrance position of the melting furnace into the melting furnace, and the plurality of single-jet plasma torches are arranged on a side of the mixing chamber away from the melting furnace, and each of the single-jet plasma torches is connected to the water vapor supply assembly through a pipeline.

[0013] In one of the embodiments, the water vapor supply component is connected to an end of the mixing chamber away from the melting furnace through a pipeline.

[0014] In one of the embodiments, a plurality of the single-jet plasma torches are evenly arranged around the mixing chamber, and each of the single-jet plasma torches is arranged at the same angle to the mixing chamber.

[0015] In one embodiment, the outer shell of the single-jet plasma torch and the outer wall of the mixing chamber are both double-layer water-cooled jacket structures, and the processing device includes a cooling system, which is connected to the double-layer water-cooled jacket structure in the plasma starting component.

[0016] In one of the embodiments, one end of the mixing chamber extending into the melting furnace is a retractable structure.

[0017] In one embodiment, the processing device includes a power module and a control module, a plurality of the single-jet plasma torches are connected in parallel to the power module, and each of the single-jet plasma torches is electrically connected to the control module respectively.

[0018] In one embodiment, a discharge port is provided at the bottom of the melting furnace.

[0019] In one of the embodiments, the melting furnace comprises a furnace cover and a side wall, and a smoke outlet is provided at one end of the side wall close to the furnace cover or at one end of the furnace cover close to the side wall.

[0020] The above-mentioned radioactive waste treatment device is provided with a plasma starting component and an induction melting component at the same time. First, the plasma starting component is started to heat the furnace start-up additive, so that the heated furnace start-up additive has conductivity and thus becomes a high-temperature "seed zone". After that, the induction melting component is started. Under the action of the magnetic field of the induction melting component, the high-temperature "seed zone" generates induced eddy currents and further generates a large amount of induced heat; the induced heat of the high-temperature "seed zone" further heats the surrounding materials to melt them, so that the surrounding materials have conductivity and are induction heated under the action of the magnetic field; finally, the materials in the entire melting furnace are heated and melted and have conductivity, so that they can be induction heated.

[0021] The plasma starting assembly is mounted on the upper end of the melting furnace, and can use high-temperature plasma to quickly heat the furnace starter additives in the melting furnace. Compared with the conventional cold crucible using electromagnetic induction to add furnace starter additives, the plasma starting method is more efficient and convenient. The induction coil is wound on the outer wall of the melting furnace, so that the entire melting furnace is in a magnetic field, and the high-temperature molten conductive materials in the melting furnace can be heated at the same time. Compared with the method of heating the materials in the furnace using only the plasma starting assembly, the heating method of the induction melting assembly is relatively uniform. In addition, the double-layer water-cooled jacket structure of the melting furnace will form a layer of cold wall on the inner wall of the furnace, which avoids corrosion and damage to the inner wall of the furnace by the high-temperature molten material. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a schematic diagram of the structure of a radioactive waste treatment device in a conventional startup situation in one embodiment.

[0023] FIG. 2 is a schematic diagram of the structure of a radioactive waste treatment device in an accelerated startup situation according to an embodiment.

[0024] Figure numerals: 1. Induction melting component; 12. Induction coil; 13. Discharge port; 14. Furnace start-up additive; 15. Solidified shell; 2. Plasma starting component; 21. Single-jet plasma torch; 22. Mixing chamber; 3. Power supply and control system; 4. Water vapor supply component; 5. Cooling system; 6. Melting furnace. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0031] Referring to FIG1 , a radioactive waste treatment device provided in one embodiment of the present application includes a melting furnace 6, a plasma starting assembly 2, a water vapor supply assembly 4, and an induction melting assembly 1. The melting furnace 6 contains a furnace starter additive 14. The plasma starting assembly 2 is arranged at the entrance of the melting furnace 6, and is used to heat the furnace starter additive 14 in the melting furnace 6. The water vapor supply assembly 4 is connected to the plasma starting assembly 2 through a pipeline, and is used to provide water vapor to the plasma starting assembly 2. The induction melting assembly 1 includes an induction coil 12 wound on the outer wall of the melting furnace 6. When the induction coil 12 is energized, it is used to generate an electromagnetic field in the melting furnace 6 to heat the furnace starter additive 14.

[0032] The furnace starter additive 14 may be glass, ceramic or a glass-ceramic mixture. Preferably, the high temperature resistivity of the furnace starter additive 14 at 1000°C-2000°C is in the range of 1Ω∙cm-20Ω∙cm.

[0033] The furnace starter additive 14 is not conductive at room temperature, and only has conductivity in a high-temperature molten state. The premise for the induction melting component 1 to achieve induction heating is that the material to be heated in the furnace must be conductive. Therefore, the process of heating the furnace starter additive 14 from room temperature to a molten state is the "startup" process of the processing device. The startup process is generally divided into regular startup and emergency startup.

[0034] Taking conventional startup as an example, during startup, firstly, non-radioactive furnace starter additive 14 is added into the melting furnace 6, then the plasma starter assembly 2 is started, and water vapor is introduced into the plasma starter assembly 2. When the plasma starter assembly 2 is powered on, an arc is formed by contacting the cathode and cathode to heat the water vapor to form a high-concentration hot plasma flow of hydrogen ions and oxygen ions, and the hot plasma is used to heat the furnace starter additive 14, so that 1 / 4-1 / 2 of the furnace starter additive 14 forms a "seed zone" of 400℃-1500℃ in the melting furnace 6, and the heated furnace starter additive 14 can conduct electricity at high temperature. Then the plasma starter assembly 2 is closed, and the induction melting assembly 1 is started, so that the conductive "seed zone" is inductively heated under the electromagnetic field, and the seed zone is further expanded until all the furnace starter additives 14 in the melting furnace 6 are melted.

[0035] The radioactive waste treatment device of the present application is provided with a plasma starting component 2 and an induction melting component 1. First, the plasma starting component 2 is started to heat the furnace start-up additive 14, so that the heated furnace start-up additive 14 has conductivity and thus becomes a high-temperature "seed zone". After that, the induction melting component 1 is started. Under the action of the magnetic field of the induction melting component 1, the high-temperature "seed zone" generates induced eddy currents and further generates a large amount of induced heat; the induced heat of the high-temperature "seed zone" further heats the surrounding materials to melt them, so that the surrounding materials have conductivity and are induction heated under the action of the magnetic field; finally, the materials in the entire melting furnace 6 are heated and melted and have conductivity, so that they can be induction heated.

[0036] The plasma starting assembly 2 is mounted on the upper end of the melting furnace 6, and can use high-temperature plasma to quickly heat the furnace starter additive 14 in the melting furnace 6. Compared with the conventional cold crucible method of adding the furnace starter additive 14 by electromagnetic induction, the plasma starting method is more efficient and convenient. The induction coil 12 is wound on the outer wall of the melting furnace 6, so that the entire melting furnace 6 is in a magnetic field, and the high-temperature molten conductive material in the melting furnace 6 can be heated at the same time. Compared with the method of heating the material in the furnace only by using the plasma starting assembly 2, the heating method of the induction melting assembly 1 is relatively uniform.

[0037] The water vapor supply component 4 is used to provide adjustable water vapor that meets the flow rate and temperature requirements for the plasma starting component 2. Using water vapor as the working gas of the plasma starting component 2 has the following advantages: ① Water vapor is cheap and has a high enthalpy value, so the heating efficiency of the plasma starting component 2 is high; ② Water vapor is one of the main products in the waste melting reaction process, and it can be considered that no impurities are introduced; ③ The flue gas in the waste melting process needs to be discharged through the flue gas treatment system. After entering the flue gas treatment system, the water vapor will first be cooled and turned into water, which will not increase the flow rate of the flue gas required to be treated by the subsequent flue gas treatment system, and therefore will not increase the working pressure of the flue gas treatment system.

[0038] In some embodiments, the furnace wall of the melting furnace 6 is a double-layer water-cooled jacket structure, and the processing device includes a cooling system 5, which is connected to the double-layer water-cooled jacket structure of the melting furnace 6.

[0039] Under normal startup conditions, when the start-up additive 14 in the melting furnace 6 is completely melted, the cooling water flow and strength of the cooling system 5 circuit are adjusted, and the melting furnace 6 and the molten start-up additive 14 in contact with the inner wall of the melting furnace 6 are cooled by the cooling water in the double-layer water-cooling jacket structure of the furnace wall, so that the furnace wall temperature is maintained between 50°C and 150°C. At this time, the molten start-up additive 14 attached to the inner wall of the melting furnace 6 solidifies to form a layer of solidified shell 15. When treating radioactive waste, the solidified shell 15 can effectively block the contact between the radioactive waste and the inner wall of the melting furnace 6, prevent the melting furnace 6 from being corroded, and extend the service life of the melting furnace 6.

[0040] In order to ensure that the height of the condensed shell 15 is appropriate, the height of the condensed shell 15 in the furnace is not less than the melting height of the radioactive waste in the furnace. Preferably, the height of the condensed shell 15 in the furnace is within the range of 1.1 times to 1.5 times the melting height of the radioactive waste in the furnace.

[0041] Among them, the double-layer water-cooling jacket structure is a prior art and will not be described in detail here.

[0042] In some embodiments, the plasma starting assembly 2 includes multiple single-jet plasma torches 21 and a mixing chamber 22, one end of the mixing chamber 22 along the axial direction extends from the entrance position of the melting furnace 6 into the melting furnace 6, and multiple single-jet plasma torches 21 are arranged on the side of the mixing chamber 22 away from the melting furnace 6, and each single-jet plasma torch 21 is connected to the water vapor supply assembly 4 through a pipeline.

[0043] A plurality of single-jet plasma torches 21 are connected to the mixing chamber 22 on the side away from the melting furnace 6. After the plasma jetted from the single-jet plasma torches 21 is mixed in the mixing chamber 22, it can be jetted into the melting furnace 6 under the guidance of the side wall of the mixing chamber 22. One end of the mixing chamber 22 along the axial direction extends from the entrance position of the melting furnace 6 into the melting furnace 6, that is, only one flange connection port needs to be opened on the melting furnace 6, so that the mixing chamber 22 is sealed and connected with the flange connection port. It is avoided that a plurality of single-jet plasma torches 21 are directly arranged on the melting furnace 6, which results in the need to open a plurality of flange connection ports on the melting furnace 6, increasing the risk of leakage of radioactive substances.

[0044] The mixing chamber 22 is sealed and connected to the inlet of the melting furnace 6 by direct welding, sealing ring sealing or the like.

[0045] Specifically, the water vapor supply assembly 4 is connected to an end of the mixing chamber 22 away from the melting furnace 6 through a pipeline.

[0046] In this embodiment, one end of the mixing chamber 22 away from the melting furnace 6 is connected to the water vapor supply assembly 4, that is, when cold water vapor is introduced from the water vapor supply assembly 4 to the mixing chamber 22, the water vapor can be used as a carrier of the mixed thermal plasma flow. By adjusting the flow rate and flow velocity of the cold water vapor and simultaneously adjusting the heating power and gas flow rate of each single jet plasma torch 21, the jet length and temperature distribution of the mixed thermal plasma flow can be flexibly adjusted to adapt to the heating of the furnace start-up additive 14 at different positions in the melting furnace 6, that is, the heating position and heating power can be flexibly adjusted.

[0047] Furthermore, a plurality of single-jet plasma torches 21 are evenly arranged on the circumference of the mixing chamber 22 , and each single-jet plasma torch 21 is arranged at the same angle to the mixing chamber 22 .

[0048] That is, each single-jet plasma torch 21 has the same angle with the axis of the mixing chamber 22, so that the jets perpendicular to the axis of the mixing chamber 22 block each other, leaving only a mixed plasma flow with uniform temperature and uniform speed toward the axis outlet of the mixing chamber 22. Specifically, the number of single-jet plasma torches 21 can be 3, and two adjacent single-jet plasma torches 21 are arranged on the circumference of the mixing chamber 22 at 120°.

[0049] Of course, the number of single-jet plasma torches 21 is not limited to three, and can be determined according to the size of the melting furnace 6 and the amount of radioactive waste to be processed.

[0050] In some embodiments, the outer shell of the single-jet plasma torch 21 and the outer wall of the mixing chamber 22 are both double-layer water-cooled jacket structures, and the processing device includes a cooling system 5, which is connected to the double-layer water-cooled jacket structure in the plasma starting component 2.

[0051] In this embodiment, the outer shell of the single-jet plasma torch 21 and the outer wall of the mixing chamber 22 are both double-layer water-cooled jacket structures. Before the single-jet plasma torch 21 is started, cooling water is introduced into the double-layer water-cooled jacket structure to cool the plasma starting component 2 during operation.

[0052] In some embodiments, one end of the mixing chamber 22 extending into the melting furnace 6 is a retractable structure.

[0053] Specifically, when the melting furnace 6 is just started, the plasma starting component 2 needs to be used to heat the furnace starting additive 14 to form a "seed zone". At this time, the elongation length of the mixing chamber 22 can be adjusted by the elasticity of the mixing chamber 22, that is, the heating position can be adjusted. When the "seed zone" is formed, the plasma starting component 2 is turned off, and the furnace starting additive 14 is heated by the induction melting component 1, that is, the mixing chamber 22 can be shortened to the shortest.

[0054] In some embodiments, the processing device includes a power module and a control module, a plurality of single-jet plasma torches 21 are connected in parallel to the power module, and each single-jet plasma torch 21 is electrically connected to the control module respectively.

[0055] Specifically, the power module includes an induction melting power module and a plasma power module, and the control module includes an induction melting control module and a plasma control module. The induction melting power module and the induction melting control module are used to provide an induction power supply for the induction melting component 1 and realize power regulation. The plasma power module and the plasma control module are used to provide a power supply circuit, an arc ignition circuit and realize power regulation for the plasma starting component 2. Among them, multiple single-jet plasma torches 21 are connected in parallel with the plasma power module, and each single-jet plasma torch 21 is electrically connected to the plasma control module respectively, so that the synchronous regulation of the working gas power of multiple single-jet plasma torches 21 can be realized, and the uniformity of the mixed plasma flow generated by the plasma starting component 2 is ensured, and the axial collimation is improved.

[0056] In some embodiments, a discharge port 13 is provided at the bottom of the melting furnace 6 , and the molten body containing the radioactive waste is discharged from the discharge port 13 .

[0057] In some embodiments, the melting furnace 6 includes a furnace cover and a side wall, and a smoke outlet is arranged on the side of the side wall close to the furnace cover. The smoke outlet is arranged on the side of the side wall close to the furnace cover, and can also be arranged on the side of the furnace cover close to the side wall to facilitate the discharge of smoke.

[0058] In actual use, combined with Figure 1, the routine startup specifically includes the following steps:

[0059] (1) 30 kg of non-radioactive start-up additive 14 is added to the melting furnace 6 of the treatment device with a processing capacity of 20 kg / h, and the cooling system 5 circuit of the treatment device is started to the maximum cooling water flow rate. The high temperature resistivity of the start-up additive 14 at 1200°C is 10 Ω∙cm, and the height of the solidified shell 15 is 1.2 times the height of the waste.

[0060] (2) The muzzle of the plasma starting component 2 is located above the induction heating area, and the power of the plasma starting component 2 is continuously adjustable within the range of 50kW-200kW. The plasma starting component 2 is started, the power is adjusted to the range of 80kW-120kW, and the water vapor flow rate is adjusted so that the mixed plasma flow range covers the start-up additive 14, a hot plasma area is formed above the start-up additive 14, and the start-up additive 14 is heated by the hot plasma, so that 1 / 4-1 / 2 of the start-up additive 14 forms a molten start-up additive 14 of 400℃-1500℃, forming a "seed area".

[0061] (3) The plasma starting component 2 is turned off, and the induction melting component 1 is started to form an eddy current on the seed area. The large amount of heat generated by the eddy current causes the seed area to further expand until the start-up additive 14 is completely melted.

[0062] (4) Adjust the cooling water flow and intensity of the cooling system 5 circuit, and use the cooling water in the double-layer water-cooling jacket of the melting furnace 6 to cool down the melting furnace 6 and the start-up additive 14 in contact with the inner wall of the melting furnace 6, so that the temperature of the melting furnace 6 is maintained between 50°C and 150°C, so that the molten start-up additive 14 attached to the inner wall of the melting furnace 6 solidifies to form a layer of solidified shell 15.

[0063] (5) The power of the induction melting component 1 is adjusted to be within the range of 50 kW to 150 kW, and the start-up additive 14 in the central area of ​​the melting furnace 6 is kept in a high temperature melting state of 700° C. to 1500° C.

[0064] The normal startup process of the treatment device of the present application takes a total of 1 hour, the furnace start-up additives 14 are all melted, and the thickness and height of the solidified shell 15 meet the requirements of subsequent radioactive waste melting treatment.

[0065] Combined with Figure 2, the emergency startup includes the following steps:

[0066] (1) In the case of emergency start-up, the furnace start-up additive 14 and the condensed shell 15 are already present in the melting furnace 6 with a processing capacity of 50 kg / h. The high temperature resistivity of the furnace start-up additive 14 at 1500°C meets the furnace start-up requirements, and no further substances need to be added to the furnace. The cooling system 5 circuit of the treatment device is adjusted to the maximum cooling water flow rate.

[0067] (2) The muzzle of the plasma starting component 2 is located above the induction heating area, and the power of the plasma starting component 2 is continuously adjustable within the range of 100kW-500kW. The plasma starting component 2 is started, the power is adjusted to the range of 300kW-350kW, and the flow rate of the working gas water vapor is adjusted so that the mixed plasma flow range covers the furnace start-up additive 14 in the furnace, and a hot plasma area is formed above the furnace start-up additive 14 in the furnace. The furnace start-up additive 14 in the furnace is heated by the hot plasma, so that 1 / 4-1 / 2 of the furnace start-up additive 14 in the furnace forms a molten body of 400℃-1500℃, forming a "seed zone".

[0068] (3) The plasma starting component 2 is turned off, and the induction melting component 1 is started to form an eddy current on the seed area. The large amount of heat generated by the eddy current causes the seed area to further expand until all the starting additives 14 in the furnace are melted.

[0069] (4) In the case of emergency start-up, there is already a solidified crust 15 on the inner wall of the furnace. The cooling water flow and intensity of the cooling system 5 circuit are adjusted to maintain the temperature of the melting furnace 6 between 50°C and 150°C, so that the solidified crust 15 on the inner wall of the furnace maintains an appropriate thickness.

[0070] (5) The power of the induction melting component 1 is adjusted to be in the range of 250 kW to 400 kW, and the start-up additive 14 in the central area of ​​the melting furnace 6 is kept in a high temperature molten state of 1500°C.

[0071] The emergency start-up process of the treatment device of the present application takes a total of 0.5 hours, the furnace start-up additives 14 are all melted, and the thickness and height of the solidified shell 15 meet the protection requirements for radioactive waste melting treatment.

[0072] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A radioactive waste treatment device, characterized in that: The processing device comprises: A melting furnace, the melting furnace being used to contain a furnace start-up additive; A plasma starting component, disposed at the entrance of the melting furnace, for heating the furnace starting additive in the melting furnace; a water vapor supply component connected to the plasma starting component through a pipeline, and used for providing water vapor to the plasma starting component; and The induction melting component comprises an induction coil wound on the outer wall of the melting furnace. The induction coil is used to generate an electromagnetic field in the melting furnace after being energized to heat the furnace start-up additive.

2. The radioactive waste treatment device according to claim 1, characterized in that: The furnace wall of the melting furnace is a double-layer water-cooling jacket structure, and the processing device includes a cooling system, which is connected to the double-layer water-cooling jacket structure of the melting furnace.

3. The radioactive waste treatment device according to claim 1, characterized in that: The plasma starting assembly includes a plurality of single-jet plasma torches and a mixing chamber, one end of the mixing chamber along the axial direction extends from the entrance position of the melting furnace into the melting furnace, and the plurality of single-jet plasma torches are arranged on a side of the mixing chamber away from the melting furnace, and each of the single-jet plasma torches is connected to the water vapor supply assembly through a pipeline.

4. The radioactive waste treatment device according to claim 3, characterized in that: The water vapor supply component is communicated with an end of the mixing chamber away from the melting furnace through a pipeline.

5. The radioactive waste treatment device according to claim 3, characterized in that: A plurality of the single-jet plasma torches are evenly arranged on the circumference of the mixing chamber, and each of the single-jet plasma torches is arranged at the same angle to the mixing chamber.

6. The radioactive waste treatment device according to claim 3, characterized in that: The shell of the single-jet plasma torch and the outer wall of the mixing chamber are both double-layer water-cooled jacket structures. The processing device includes a cooling system, which is connected to the double-layer water-cooled jacket structure in the plasma starting component.

7. The radioactive waste treatment device according to claim 3, characterized in that: One end of the mixing chamber extending into the melting furnace is a retractable structure.

8. The radioactive waste treatment device according to claim 3, characterized in that: The processing device comprises a power module and a control module. A plurality of the single-jet plasma torches are connected in parallel to the power module, and each of the single-jet plasma torches is electrically connected to the control module respectively.

9. The radioactive waste treatment device according to claim 1, characterized in that: A discharge port is provided at the bottom of the melting furnace.

10. The radioactive waste treatment device according to claim 1, characterized in that: The melting furnace comprises a furnace cover and a side wall, and a smoke outlet is provided at one end of the side wall close to the furnace cover or at one end of the furnace cover close to the side wall.

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