Incinerator for radioactive organic waste liquid treatment

Abstract

The invention relates to an incinerator for radioactive organic waste liquid treatment. The incinerator comprises an incinerator body, a liquid inlet ignition device arranged at the top of the incinerator body and an auxiliary combustion device fixedly installed on the side wall of the incinerator body. The auxiliary combustion device comprises a plurality of thermocouples and at least one auxiliary combustor which are fixedly installed on the side wall of the incinerator body in an embedded mode, the thermocouples and the auxiliary combustors are embedded into a hearth, and the thermocouples are located on the same side of the side wall of the incinerator body. The thermocouples are uniformly distributed at different height positions in the axial direction of the hearth, and temperature sensors are arranged on the thermocouples; the auxiliary combustors are located on the opposite sides of the multiple thermocouples and are turned on or turned off according to the temperature information of the temperature sensor so as to adjust the temperature in the hearth. By the adoption of the integrated design, incineration treatment of the whole organic waste liquid can be completed through single-person electric control, and the working difficulty and workload are greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of radioactive organic waste liquid treatment, in particular to an incinerator for treating radioactive organic waste liquid. Background Art

[0002] With the rapid development of the nuclear energy industry, the amount of low- and medium-level radioactive waste liquids generated in nuclear power plants, nuclear laboratories and other places has increased year by year, and the requirements for waste liquid treatment have become increasingly stringent. Among these waste liquids, radioactive organic waste liquids have become a major challenge due to their complex composition and special treatment difficulty. Radioactive organic waste liquids mainly include waste solvents, process waste oils, lubricants, diluents and detergents, among which waste solvents mainly based on tributyl phosphate (TBP) and kerosene are widely used in the reprocessing of spent fuel. These waste liquids are highly fluid, flammable and biotoxic, making them difficult to transport and handle, and there are great risks in safety management.

[0003] At present, the treatment of radioactive organic waste liquid faces two major challenges: one is the treatment of organic solvents, and the other is the disposal of radioactive nuclides. Since radioactive organic waste liquid cannot usually be discharged directly, the existing treatment methods are mainly based on temporary storage. However, with the long-term accumulation of waste liquid, the fire hazards and radioactive contamination risks brought by storage are increasing. At the same time, the chemical properties of the waste liquid may change, increasing the complexity of subsequent treatment. Long-term storage is not only difficult to ensure safety, but also limits the disposal capacity of waste liquid.

[0004] Based on this, incineration is considered to be an effective way to treat radioactive organic waste liquid. Through incineration, most non-volatile nuclides can be retained in the incineration ash, thereby reducing treatment costs and improving the safety of final disposal by producing inorganic inert substances. However, existing incineration devices generally have problems such as complex processes, long preheating time, and low mixing treatment efficiency, and are unable to efficiently and safely treat various types of radioactive organic waste liquid. Therefore, it is urgent to develop an incineration device specifically suitable for treating radioactive organic waste liquid, which can provide a safe, reliable, and easy-to-operate and maintain treatment solution while ensuring radiation protection.

[0005] In view of the above problems, the present invention is proposed. Summary of the invention

[0006] The invention discloses an incinerator for treating radioactive organic waste liquid, aiming to solve the technical problems existing in the prior art.

[0007] According to one aspect of the present invention, there is provided an incinerator for treating radioactive organic waste liquid, comprising an incinerator body, a liquid inlet ignition device disposed on the top of the incinerator body, and an auxiliary combustion device fixedly mounted on the side wall of the incinerator body;

[0008] The incinerator body includes a furnace, which is used to provide an incineration space;

[0009] The liquid inlet ignition device comprises an organic waste liquid inlet, a fourth air inlet and an igniter which are located at the top center of the incinerator body and are sequentially distributed. The organic waste liquid inlet is used to introduce radioactive organic waste liquid, and the fourth air inlet is used to introduce air required for combustion. The radioactive organic waste liquid and air can be ignited by the igniter when entering the furnace.

[0010] The auxiliary combustion device includes multiple thermocouples and at least one auxiliary burner embedded and fixedly installed on the side wall of the incinerator body. The multiple thermocouples and at least one auxiliary burner are respectively embedded in the furnace. The multiple thermocouples are located on the same side of the side wall of the incinerator body and are evenly distributed at different heights in the axial direction of the furnace. Temperature sensors are provided on the multiple thermocouples; at least one auxiliary burner is located on the opposite side of the multiple thermocouples. The temperature information of the temperature sensor is turned on or off to adjust the temperature in the furnace.

[0011] As a preferred technical solution, at least one thermocouple is higher in the axial direction of the furnace than the auxiliary burner, and at least one thermocouple is lower in the axial direction of the furnace than the auxiliary burner.

[0012] As a preferred technical solution, when there is one auxiliary burner, the auxiliary burner is arranged at a lower position in the middle of the furnace.

[0013] As a preferred technical solution, when there are multiple auxiliary burners, the multiple auxiliary burners are evenly distributed in the middle and lower parts of the furnace.

[0014] As a preferred technical solution, the auxiliary burner is an electric heater.

[0015] As a preferred technical solution, the auxiliary burner is one of a resistance heater, an electric heating tube, an infrared heater, and an arc heater.

[0016] As a preferred technical solution, a first insulation layer, a second insulation layer and a furnace shell are sequentially arranged on the outside of the furnace, the first insulation layer is made of refractory material, the second insulation layer is made of heat-resistant material, and the furnace shell is made of carbon steel material.

[0017] As a preferred technical solution, the auxiliary combustion device also includes a sight glass port and a second air inlet, the second air inlet is fixedly mounted on the sight glass port, and the axial direction of the second air inlet is perpendicular to the axial direction of the sight glass port.

[0018] According to another aspect of the present invention, there is also provided an incineration method for treating radioactive organic waste liquid using the above-mentioned incinerator, comprising the following steps:

[0019] S2: Turn on the auxiliary burner to preheat the furnace. After preheating to the expected temperature through temperature feedback information from multiple thermocouples, turn off the auxiliary burner to complete the preheating;

[0020] S3: Opening the organic waste liquid inlet and the fourth air inlet at the same time, introducing the radioactive organic waste liquid and the air required for combustion, and igniting them through the igniter, so that the radioactive organic waste liquid burns in the furnace;

[0021] S4: Through the temperature feedback information of multiple thermocouples, the auxiliary burner is adjusted to open or close, and the temperature in the furnace is adjusted.

[0022] As a preferred technical solution, step S1 is also included before step S2, adding kerosene to the radioactive organic waste liquid to adjust the viscosity and overall calorific value of the radioactive organic waste liquid.

[0023] The technical solution adopted by the present invention can achieve at least one of the following beneficial effects:

[0024] 1. The present invention adopts an integrated design of embedding and fixing the auxiliary burner on the side wall of the furnace, which does not require the help of an external independent auxiliary preheating incinerator, shortens the preheating time of the incinerator, and has a simple structure. It can realize the incineration treatment of the entire organic waste liquid by a single person, greatly reducing the difficulty and workload of the work and improving efficiency.

[0025] 2. The present invention uses temperature sensors arranged on multiple thermocouples to monitor the temperature in the furnace, and based on the temperature feedback information provided by the temperature sensors, adjusts the opening or closing of the auxiliary burner to adjust the temperature in the furnace in real time, maintains a stable high temperature in the furnace, and allows the radioactive organic waste liquid to be fully burned.

[0026] 3. The incinerator body of the present invention is provided with a first insulation layer, a second insulation layer and a furnace shell in sequence from the furnace to the outside, which can play a good supporting and protective role, and at the same time has the effect of heat insulation and radiation shielding, and is suitable for the application field of radioactive organic waste liquid treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0028] Figure 1 It is a front view schematic diagram of an incinerator for treating radioactive organic waste liquid according to Example 1 of the present invention;

[0029] Figure 2 It is a front view schematic diagram of an incinerator for treating radioactive organic waste liquid according to Example 2 of the present invention;

[0030] Figure 3 This is a schematic top view of an incinerator for treating radioactive organic waste liquid according to Example 1 of the present invention.

[0031] Description of reference numerals:

[0032] 1. Incinerator body; 11. Furnace; 12. First insulation layer; 13. Second insulation layer; 14. Furnace shell; 15. Smoke outlet; 2. Auxiliary combustion device; 21. First air inlet; 22. Thermocouple; 23. Auxiliary burner; 24. Sight glass port; 25. Second air inlet; 3. Liquid inlet ignition device; 31. Third air inlet; 32. Incineration nozzle; 33. Organic waste liquid inlet; 34. Fourth air inlet; 35. Ignitor. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or a magnetic connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] In order to solve the problems existing in the prior art, the embodiment of the present invention provides an incinerator for treating radioactive organic waste liquid, such as Figure 1-3 As shown, it includes an incinerator body 1, an auxiliary combustion device 2 and a liquid inlet ignition device 3. The incinerator body 1 is mainly used to contain and process the combustion of radioactive organic waste liquid or fuel. The incinerator body 1 is a vertical furnace structure. Figure 1The direction of the incinerator in use is shown as the standard. The liquid inlet ignition device 3 is arranged on the top of the incinerator body 1, and is mainly used to start the incineration process by providing an initial fire source or heat to ignite the radioactive organic waste liquid or fuel in the incinerator.

[0037] In order to ensure that the incinerator body 1 provides a high-temperature environment for the radioactive organic waste liquid to be completely incinerated under the condition of full oxidation, the incinerator body 1 is designed to include a furnace 11, a first insulation layer 12, a second insulation layer 13 and a furnace shell 14 arranged in sequence from the inside to the outside. Among them, the furnace 11 is the main reaction space for the combustion of radioactive organic waste liquid, and is subjected to high temperature and chemical corrosion. The first insulation layer 12 and the second insulation layer 13 are arranged close to the outside of the furnace 11, wherein the first insulation layer 12 adopts refractory bricks made of refractory materials, preferably, the refractory materials can be silicon bricks, high-alumina bricks, magnesia-chrome bricks, dolomite bricks, silicon carbide bricks, etc., which play the role of heat storage and improving structural strength. The second insulation layer 13 is arranged on the outside of the first insulation layer 12, and mainly adopts high-efficiency heat-resistant materials such as ceramic fiber materials, aluminum silicate fibers, rock wool products, high-alumina insulation refractory bricks, foamed ceramic materials, etc., which are used to isolate and reduce heat conduction to the outside, ensure that the external temperature of the incinerator body 1 is suitable and improve energy utilization efficiency. The furnace shell 14 is located at the outermost layer of the incinerator body 1, covering the second heat insulation layer 13, playing a supporting and protective role, and having the effects of heat insulation and radiation shielding. Preferably, the furnace shell 14 is made of metal materials such as carbon steel, which can withstand mechanical stress and other physical damage from the external environment. The above structural design enables the incinerator body 1 to withstand high temperatures of about 1100°C for a long time.

[0038] like Figure 1-Figure 3 As shown, the auxiliary combustion device 2 includes a plurality of thermocouples 22 and an auxiliary burner 23 which are inserted into the furnace 11 from the outside of the incinerator body 1 through the side walls of the furnace 11, that is, the above-mentioned thermocouples 22 and auxiliary burners 23 are embedded and fixedly installed in the incinerator body 1, so as to realize direct preheating of the incinerator body 1 or continuous heating during the incineration process, without the need to separately set up a preheating incinerator outside the incinerator body 1. The plurality of thermocouples 22 are located on the same side and are evenly distributed at different axial heights of the furnace 11, and the auxiliary burner 23 is located on the other side opposite thereto. This is mainly in consideration of the heating function of the auxiliary burner 23. If the auxiliary burner 23 is located on the same side or at a close distance to the plurality of thermocouples 22, it will affect the accuracy of the measurement of the actual temperature data in the furnace 11 by the plurality of thermocouples 22. Figure 1The direction of the incinerator in use is based on the direction of the incinerator shown in the figure. From the axial direction of the incinerator body 1, at least one thermocouple 22 is located higher than the auxiliary burner 23, and at least one thermocouple 22 is located lower than the auxiliary burner 23. Preferably, a temperature sensor is provided on the thermocouple 22, which can accurately detect the high temperature environment in the furnace 11, and cooperate with the control system of the incinerator body 1 by feedback of the temperature signal, so as to play a role in real-time regulation of the fuel input, air supply and combustion state during the incineration process, ensure that the temperature is maintained within the optimal range, promote the full combustion of the radioactive organic waste liquid, and prevent the occurrence of overheating or inefficient combustion. At the same time, the position setting of multiple thermocouples at different heights is conducive to ensuring that the temperature distribution in the entire furnace 11 is fully covered. Preferably, the number of thermocouples 22 is 2-5.

[0039] The auxiliary burner 23 is arranged opposite to the multiple thermocouples 22 in the radial direction of the incinerator body 1, and is used to preheat the furnace 11 and adjust the temperature in the furnace 11 during the incineration process. In order to achieve the above purpose, the auxiliary burner 23 adopts an electric heater. Preferably, the auxiliary burner 23 can be a resistance heater, an electric heating tube, an infrared heater, an arc heater, etc. The functions of the auxiliary burner 23 mainly include: preheating the furnace 11, raising the temperature of the radioactive organic waste liquid or fuel to the autoignition point before entering the furnace 11; maintaining a stable high-temperature environment, providing an auxiliary heat source during the combustion process to ensure continuous combustion; and preventing incomplete combustion, improving the efficiency and pollutant control ability of the incinerator. By adding the auxiliary burner 23, the incinerator can maintain stable operating performance under low load or when the fuel is difficult to burn. Further preferably, the number of the auxiliary burners 23 is 1 or more. The number of the auxiliary burners 23 can be 1-3.

[0040] When the number of the auxiliary burners 23 is one or more, the distribution thereof is as follows:

[0041] Embodiment 1:

[0042] like Figure 1 As shown, as a preferred embodiment, when the number of the auxiliary burner 23 is one, the auxiliary burner 23 is arranged at a middle lower position in the axial direction of the furnace 11, and the upper part of the furnace 11 is close to the liquid inlet ignition device 3. The radioactive organic waste liquid or fuel in this area is easier to ignite, and its temperature can rise rapidly. In order to ensure the combustion efficiency and high temperature environment of the lower space of the furnace 11, the auxiliary burner 23 is arranged near the lower position, so that the temperature of the radioactive organic waste liquid or fuel is raised to the autoignition point before entering the lower space of the furnace 11 and a stable high temperature environment is maintained.

[0043] Embodiment 2:

[0044] like Figure 2As shown, as a preferred embodiment, in order to further increase the role of the auxiliary burner 23, a plurality of auxiliary burners 23 are provided, for example, two auxiliary burners 23, which are respectively distributed in the middle and lower parts of the axial direction of the furnace 11, to further cover the heating space range of the entire furnace 11, and better ensure that the temperature of the radioactive organic waste liquid or fuel is raised to the auto-ignition point before entering the lower space of the furnace 11 and to maintain a stable high-temperature environment.

[0045] Through the above structural design, in order to ensure complete combustion, the entire furnace 11 is first preheated by the auxiliary burner 23, and the temperature feedback signals of multiple thermocouples 22 are used to monitor the internal temperature of the furnace 11. When the expected preheating temperature (700°C-800°C) of the radioactive organic waste liquid treatment is reached, the auxiliary burner 23 is turned off to complete the preheating. Subsequently, the radioactive organic waste liquid is introduced through the liquid inlet ignition device 3 and ignited to ignite it. During the combustion stage, according to the temperature feedback signals of multiple thermocouples 22, the heating condition of the furnace 11 is adjusted by switching the auxiliary burner 23 on and off, so that the temperature of the furnace 11 is maintained at 800°C-1000°C, thereby ensuring the full combustion of the radioactive organic waste liquid. The design of directly fixing the auxiliary burner 23 on the incinerator body 1 can realize the whole process of radioactive organic waste liquid incineration treatment by a single person electronically controlled, compared with the traditional solution of external auxiliary combustion preheating incinerator, and the device structure is simple, which greatly reduces the difficulty and workload of the work, improves efficiency, avoids excessive consumption of manpower and material resources, and effectively saves resources.

[0046] In some preferred embodiments, the auxiliary combustion device 2 further includes a sight glass port 24 and a second air inlet 25. The sight glass port 24 is located on the same side as the auxiliary burner 23, and is higher than the auxiliary burner 23 in the axial direction of the furnace 11, and is used for the combustion flame inside the furnace 11. The second air inlet 25 is fixedly mounted on the sight glass port 24, close to the outside of the furnace shell 14, and the axial direction of the second air inlet 25 is perpendicular to the axial direction of the sight glass port 24. Preferably, the second air inlet 25 is a compressed air port design, which is used to supplement air into the furnace 11, and blow away the fly ash in the pipe of the sight glass port 24 through the airflow, so as to prevent the sight glass port 24 from absorbing the fly ash and blocking the line of sight.

[0047] In some preferred embodiments, the auxiliary combustion device 2 further includes a first air inlet 21 for supplementing the air required for combustion into the furnace 11. During the combustion stage, the air volume of the first air inlet 21 is adjusted according to the temperature feedback signals of the multiple thermocouples 22, thereby adjusting the combustion conditions in the furnace 11. At the same time, the air volume of the first air inlet 21 is adjusted in combination with the on / off and heating conditions of the auxiliary burner 23, thereby ensuring sufficient combustion of the radioactive organic waste liquid in the furnace 11.

[0048] In some preferred embodiments, Figure 1-Figure 3As shown, the liquid inlet ignition device 3 includes an organic waste liquid inlet 33, a fourth air inlet 34 and an igniter 35 which are located at the top center of the incinerator body 1 and are distributed in sequence. The organic waste liquid inlet 33, the fourth air inlet 34 and the igniter 35 are located on the same straight line and are distributed in sequence, wherein the axis of the fourth air inlet 34 coincides with the axis of the incinerator body 1, and the straight line coincides with the straight line where the diameter of the incinerator body 1 is located. The fourth air inlet 34 is used to supply sufficient air during the combustion process to promote the full combustion of radioactive organic waste liquid or fuel. Figure 1 As shown, preferably, the igniter 35 is inserted into the incinerator body 1 at a certain angle to prevent flame backflow, enhance fuel mixing effect, etc., thereby improving the stability of the ignition process and the overall incineration efficiency. The organic waste liquid inlet 33 is used to introduce radioactive organic waste liquid.

[0049] In some preferred embodiments, the igniter 35 is a high-energy igniter that can be started or stopped by remote control and is used to ignite the radioactive organic waste liquid or fuel entering the furnace 11 .

[0050] In some preferred embodiments, Figure 1 As shown, the liquid inlet ignition device 3 also includes a burning nozzle 32. Figure 1 The direction of the incinerator in use is based on the direction of the incinerator in use shown in the figure, and the incineration nozzle 32 is located below the fourth air inlet 34, and is connected to the fourth air inlet 24 and the organic waste liquid inlet 33 respectively. The radioactive organic waste liquid and the air required for combustion are mixed in the incineration nozzle 32 through the organic waste liquid inlet 33 and the fourth air inlet 24, respectively, and are transported to the furnace 11 through the incineration nozzle 32. Preferably, the incineration nozzle 32 is a double-flow atomizing nozzle. Further preferably, the incineration nozzle 32 is made of metal material such as 304 stainless steel.

[0051] In some preferred embodiments, Figure 1 and Figure 3 As shown, the liquid inlet ignition device 3 also includes a third air inlet 31. The pipe of the third air inlet 31 is curved, and its end is connected to the upper part of the furnace 11 to provide air required for combustion. The axis of the port of the third air inlet 31 located outside the incinerator body 1 is located on the same straight line as the axis of the port of the organic waste liquid inlet 33, the fourth air inlet 34 and the igniter 35. The port axis of the third air inlet 31 is closer to the edge of the end face of the incinerator body 1.

[0052] In some preferred embodiments, the incinerator body 1 also includes a smoke outlet 15, which is located at the rear of the furnace 11 and is connected to its rear opening, for discharging the smoke generated during the incineration process, ensuring that the exhaust gas generated by the combustion in the furnace 11 can be discharged in a timely and safe manner, while providing good ventilation and airflow management for the combustion process.

[0053] In some preferred embodiments, in order to achieve rapid installation, maintenance and replacement, the third air inlet 31, the organic waste liquid inlet 33, the fourth air inlet 34 and the igniter 35 are connected to the furnace 11 through flanges, which facilitates the safe transportation of radioactive organic waste liquid under high temperature conditions; the flue gas outlet 15 is connected to the furnace 11 through a flange to provide a good seal and prevent leakage.

[0054] The present invention also provides an incineration method for treating radioactive organic waste liquid using the above incinerator, comprising the following steps:

[0055] Mixing and viscosity adjustment step S1: adjusting the viscosity and overall calorific value of the mixed organic waste liquid by adding kerosene to the radioactive organic waste liquid. Generally, the viscosity of the radioactive organic waste liquid is reduced to below 30 mPa·s by adding kerosene.

[0056] Incinerator preheating step S2: preheat the furnace 11 by turning on the auxiliary burner 23, and after preheating to a temperature suitable for the combustion of the mixed organic waste liquid (700°C-800°C) by observing the temperature feedback information of multiple thermocouples 22, turn off the auxiliary burner 23 to complete the preheating.

[0057] Incineration ignition step S3: Open the third air inlet 31, and open the organic waste liquid inlet 33 and the fourth air inlet 34 at the same time, introduce the mixed organic waste liquid after viscosity reduction into the organic waste liquid inlet 33, and input it into the furnace 11 through the incineration nozzle 32, mix it with the air of the third air inlet 31 in the incineration nozzle 32, and the incineration nozzle 32 uses the high-pressure air input from the third air inlet 31 to atomize the mixed organic waste liquid. When the mixed organic waste liquid enters the furnace 11, it is ignited by the igniter 35 and burns at high temperature in the furnace 11. At this time, the combustion flame in the furnace 11 can be observed through the sight glass port 24.

[0058] Continuous incineration step S4: Through the temperature feedback information of multiple thermocouples 22, the air volume of the first air inlet 21 is adjusted to adjust the combustion conditions in the furnace 11, and the switch of the auxiliary burner 23 is adjusted to adjust the temperature in the furnace 11 so that its temperature is controlled at 800℃-1000℃, thereby ensuring that the mixed organic waste liquid is fully burned in the furnace 11 and the flue gas residence time is not less than 2s.

[0059] By incinerating the mixed organic waste liquid, the treatment of radioactive organic waste liquid and the fixation of some radioactive elements are achieved. The above-mentioned incinerator has a radioactive organic waste liquid treatment capacity of 2L / h.

[0060] The above-mentioned incinerator can be matched with subsequent exhaust gas treatment equipment to achieve better purification.

[0061] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. An incinerator for treating radioactive organic waste liquid, characterized in that: It includes an incinerator body, a liquid inlet ignition device arranged on the top of the incinerator body, and an auxiliary combustion device fixedly installed on the side wall of the incinerator body; The incinerator body comprises a furnace for providing an incineration space; The liquid inlet ignition device comprises an organic waste liquid inlet, a fourth air inlet and an igniter which are located at the top center of the incinerator body and are sequentially distributed, the organic waste liquid inlet is used to introduce radioactive organic waste liquid, the fourth air inlet is used to introduce air required for combustion, and the radioactive organic waste liquid and the air can be ignited by the igniter when entering the furnace; The auxiliary combustion device includes a plurality of thermocouples and at least one auxiliary burner embedded and fixedly installed on the side wall of the incinerator body. The plurality of thermocouples and the at least one auxiliary burner are respectively embedded in the interior of the furnace. The plurality of thermocouples are located on the same side of the side wall of the incinerator body and are evenly distributed at different heights in the axial direction of the furnace. The plurality of thermocouples are provided with temperature sensors. The at least one auxiliary burner is located on the opposite side of the plurality of thermocouples and is opened or closed according to the temperature information of the temperature sensor to adjust the temperature in the furnace.

2. The incinerator for treating radioactive organic waste liquid according to claim 1, characterized in that: The height of at least one of the thermocouples in the axial direction of the furnace is higher than that of the auxiliary burner, and the height of at least one of the thermocouples in the axial direction of the furnace is lower than that of the auxiliary burner.

3. The incinerator for treating radioactive organic waste liquid according to claim 2, characterized in that: When the number of the auxiliary burner is one, the auxiliary burner is arranged at a lower position in the middle of the furnace.

4. The incinerator for treating radioactive organic waste liquid according to claim 2, characterized in that: When there are multiple auxiliary burners, the multiple auxiliary burners are evenly distributed in the middle and lower parts of the furnace.

5. The incinerator for treating radioactive organic waste liquid according to claim 3 or 4, characterized in that: The auxiliary burner is an electric heater.

6. The incinerator for treating radioactive organic waste liquid according to claim 5, characterized in that: The auxiliary burner is one of a resistance heater, an electric heating tube, an infrared heater and an arc heater.

7. The incinerator for treating radioactive organic waste liquid according to any one of claims 1 to 6, characterized in that: The first heat insulation layer, the second heat insulation layer and the furnace shell are sequentially arranged on the outer side of the furnace, the first heat insulation layer is made of refractory material, the second heat insulation layer is made of heat-resistant material, and the furnace shell is made of carbon steel material.

8. The incinerator for treating radioactive organic waste liquid according to any one of claims 1 to 6, characterized in that: The auxiliary combustion device also includes a sight glass port and a second air inlet, wherein the second air inlet is fixedly mounted on the sight glass port, and an axial direction of the second air inlet is perpendicular to the axial direction of the sight glass port.

9. An incineration method for treating radioactive organic waste liquid using the incinerator according to any one of claims 1 to 8, characterized in that: The steps include: S2: turning on the auxiliary burner to preheat the furnace, and after preheating to the expected temperature through the temperature feedback information of the multiple thermocouples, turning off the auxiliary burner to complete the preheating; S3: opening the organic waste liquid inlet and the fourth air inlet at the same time, introducing the radioactive organic waste liquid and the air required for combustion, and igniting them through the igniter, so that the radioactive organic waste liquid burns in the furnace; S4: adjusting the opening or closing of the auxiliary burner and adjusting the temperature in the furnace through the temperature feedback information of the multiple thermocouples.

10. The incineration method according to claim 9, characterized in that: The method further includes step S1 before step S2, adding kerosene to the radioactive organic waste liquid to adjust the viscosity and overall calorific value of the radioactive organic waste liquid.

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