A furnace for the incineration of radioactive organic waste liquids

Abstract

The present application relates to a kind of incinerator for radioactive organic waste liquid treatment, including incinerator body, setting at the top of incinerator body liquid inlet ignition device, and fixedly installed in the sidewall of incinerator body auxiliary combustion device;Wherein auxiliary combustion device includes multiple thermocouples and at least one auxiliary burner embeddedly fixedly installed in the sidewall of incinerator body, multiple thermocouples and at least one auxiliary burner are embedded to the inside of furnace respectively, multiple thermocouples are located in the same side of the sidewall of incinerator body, are evenly distributed in the different height positions on the axial direction of furnace, temperature sensor is provided on multiple thermocouples;At least one auxiliary burner is located in the opposite side of multiple thermocouples, according to the temperature information of temperature sensor, open or close, to adjust the temperature in furnace.The present application adopts the above-mentioned integrated design, can realize single electric control to complete the incineration treatment of entire organic waste liquid, greatly reduce the work difficulty and workload.

Description

Technical Field

[0001] This invention relates to the field of radioactive organic waste liquid treatment technology, and in particular to an incinerator for treating radioactive organic waste liquid. Background Technology

[0002] With the rapid development of the nuclear energy industry, the volume of low- and intermediate-level radioactive waste liquids generated by nuclear power plants, nuclear laboratories, and other sites is increasing year by year, and the requirements for waste liquid treatment are becoming increasingly stringent. Among these waste liquids, radioactive organic waste liquids pose a significant challenge due to their complex composition and unique treatment difficulties. Radioactive organic waste liquids mainly include waste solvents, process waste oils, lubricants, diluents, and detergents, among which waste solvents, primarily tributyl phosphate (TBP) and kerosene, are widely used in spent fuel reprocessing. These waste liquids are highly fluid, flammable, and biotoxic, making them difficult to transport and treat, and posing significant risks in terms of safety management.

[0003] Currently, the treatment of radioactive organic waste liquids faces two major challenges: the treatment of organic solvents and the disposal of radionuclides. Since radioactive organic waste liquids typically cannot be directly discharged, existing treatment methods primarily rely on temporary storage. However, with the long-term accumulation of waste liquids, the fire hazards and radioactive contamination risks associated with storage increase significantly. Furthermore, the chemical properties of the waste liquids may change, increasing the complexity of subsequent treatment. Long-term storage not only makes it difficult to guarantee safety but also limits the capacity for waste liquid disposal.

[0004] Therefore, incineration is considered an effective method for treating radioactive organic waste liquids. Through incineration, most non-volatile nuclides can be retained in the incinerator ash, thereby reducing treatment costs and improving the safety of final disposal by generating inorganic inert substances. However, existing incineration devices generally suffer from problems such as complex processes, long preheating times, and low mixing efficiency, making them unable to efficiently and safely treat various types of radioactive organic waste liquids. Therefore, there is an urgent need to develop an incineration device specifically designed for treating radioactive organic waste liquids, capable of providing a safe, reliable, and easy-to-maintain treatment solution while ensuring radiation protection.

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

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

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

[0008] The incinerator body includes a furnace chamber for providing combustion space;

[0009] The liquid inlet ignition device includes an organic waste liquid inlet, a fourth air inlet, and an igniter, which are located at the top center of the incinerator body and distributed in sequence. The organic waste liquid inlet is used to introduce radioactive organic waste liquid, and the fourth air inlet is used to introduce the air required for combustion. The radioactive organic waste liquid and air can be ignited by the igniter when they enter 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 inside 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 along the axial direction of the furnace. Temperature sensors are provided on the multiple thermocouples. The at least one auxiliary burner is located on the opposite side of the multiple thermocouples. The temperature information of the temperature sensors is turned on or off to adjust the temperature inside the furnace.

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

[0012] As a preferred technical solution, when there is only one auxiliary burner, the auxiliary burner is located in the lower middle part 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 part 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 the following: resistance heater, electric heating tube, infrared heater, and electric arc heater.

[0016] As a preferred technical solution, a first heat insulation layer, a second heat insulation layer and a furnace shell are sequentially arranged on the outside 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.

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

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

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

[0020] S3: Simultaneously open the organic waste liquid inlet and the fourth air inlet to introduce radioactive organic waste liquid and the air required for combustion, and ignite it through the igniter so that the radioactive organic waste liquid burns in the furnace.

[0021] S4: Adjusts the opening or closing of the auxiliary burner and regulates the temperature inside the furnace by using temperature feedback information from multiple thermocouples.

[0022] As a preferred technical solution, step S1 is included before S2, in which kerosene is added 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 in this invention can achieve at least one of the following beneficial effects:

[0024] 1. This invention adopts an integrated design in which the auxiliary burner is embedded and fixedly installed on the side wall of the furnace, eliminating the need for an external independent auxiliary preheating incinerator, thus shortening the preheating time of the combustion furnace. At the same time, the structure is simple and can be completed by a single person in electric control, greatly reducing the difficulty and workload of the work and improving efficiency.

[0025] 2. This invention uses multiple thermocouples with temperature sensors to monitor the temperature inside the furnace. Based on the temperature feedback information provided, the auxiliary burner is opened or closed to regulate the temperature inside the furnace in real time, maintain a stable high temperature inside the furnace, and enable the radioactive organic waste liquid to burn completely.

[0026] 3. The incinerator body of the present invention is provided with a first heat insulation layer, a second heat insulation layer and a furnace shell in sequence from the furnace chamber outwards, which can play a good supporting and protective role, and at the same time have the effects of heat insulation and radiation shielding, and is suitable for the application field of radioactive organic waste liquid treatment. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below, forming part of the present invention. The illustrative embodiments of the present invention and their descriptions explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

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

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

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

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Incinerator body; 11. Furnace chamber; 12. First insulation layer; 13. Second insulation layer; 14. Furnace shell; 15. Flue gas outlet; 2. Auxiliary combustion device; 21. First air inlet; 22. Thermocouple; 23. Auxiliary burner; 24. Sight glass; 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. Ignition device. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. In the description of this invention, it should be noted that the term "or" is generally used to include the meaning of "and / or," unless otherwise expressly indicated.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or a magnetic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0035] Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0036] To address the problems existing in the prior art, embodiments of the present invention provide an incinerator for treating radioactive organic waste liquid, such as... Figure 1-3 As shown, the incinerator 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 treat radioactive organic waste liquid or fuel combustion. The incinerator body 1 has a vertical furnace structure. Figure 1With the orientation of the incinerator in its operating state as shown, the liquid inlet ignition device 3 is located on the top of the incinerator body 1. It 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] To ensure a high-temperature environment for the incinerator body 1, allowing for the complete combustion of radioactive organic waste under sufficient oxidation conditions, the incinerator body 1 is designed to include, from the inside out, a furnace chamber 11, a first insulation layer 12, a second insulation layer 13, and a furnace shell 14. The furnace chamber 11 serves as the main reaction space for the combustion of radioactive organic waste, enduring high temperatures and chemical corrosion. The first insulation layer 12 and the second insulation layer 13 are located close to the outside of the furnace chamber 11. The first insulation layer 12 is made of refractory bricks made of refractory materials, preferably silica bricks, high-alumina bricks, magnesia-chrome bricks, dolomite bricks, silicon carbide bricks, etc., serving to store heat and enhance structural strength. The second insulation layer 13 is located outside the first insulation layer 12 and primarily uses high-efficiency heat-resistant materials such as ceramic fiber materials, aluminosilicate fiber, rock wool products, high-alumina insulating refractory bricks, and foamed ceramic materials to insulate and reduce heat conduction outwards, ensuring a suitable external temperature for the incinerator body 1 and improving energy utilization efficiency. The furnace shell 14 is located on the outermost layer of the incinerator body 1, covering the second insulation layer 13, serving a supporting and protective function, while also providing heat insulation and radiation shielding. Preferably, the furnace shell 14 is made of metal materials such as carbon steel, capable of withstanding mechanical stress and other physical damage from the external environment. This structural design enables the incinerator body 1 to withstand long-term use at high temperatures of approximately 1100℃.

[0038] like Figures 1-3 As shown, the auxiliary combustion device 2 includes multiple thermocouples 22 and auxiliary burners 23 that pass through the side wall of the furnace 11 from outside the incinerator body 1 and are inserted into the furnace 11. That is, the thermocouples 22 and auxiliary burners 23 are embedded and fixedly installed in the incinerator body 1, realizing direct preheating of the incinerator body 1 or continuous heating during the incineration process, eliminating the need for a separate preheating incinerator outside the incinerator body 1. The multiple thermocouples 22 are located on the same side and evenly distributed at different heights along the axial direction of the furnace 11, while the auxiliary burners 23 are located on the opposite side. This is mainly due to the heating function of the auxiliary burners 23; if they were located on the same side or close to the multiple thermocouples 22, it would affect the accuracy of the measurement of the actual temperature data inside the furnace 11 by the multiple thermocouples 22. Figure 1With the incinerator in its operational state as a reference, viewed axially from the incinerator body 1, at least one thermocouple 22 is positioned higher than the auxiliary burner 23, and at least one thermocouple 22 is positioned lower than the auxiliary burner 23. Preferably, the thermocouple 22 is equipped with a temperature sensor, which can accurately detect the high-temperature environment inside the furnace 11. By feeding back the temperature signal, it works in conjunction with the control system of the incinerator body 1 to adjust the fuel input, air supply, and combustion state in real time during the incineration process, ensuring that the temperature is maintained within the optimal range, promoting the complete combustion of radioactive organic waste liquid, and preventing overheating or inefficient combustion. Simultaneously, the placement of multiple thermocouples at different heights helps to ensure comprehensive coverage of the temperature distribution throughout the entire furnace 11. Preferably, the number of thermocouples 22 is 2-5.

[0039] An auxiliary burner 23 is radially positioned opposite multiple thermocouples 22 on the incinerator body 1 to preheat the furnace 11 and regulate the temperature within the furnace 11 during combustion. To achieve these objectives, the auxiliary burner 23 is an electric heater. Preferably, the auxiliary burner 23 can be a resistance heater, electric heating tube, infrared heater, electric arc heater, etc. The main functions of the auxiliary burner 23 include: preheating the furnace 11 to raise its temperature to its auto-ignition point before radioactive organic waste liquid or fuel enters the furnace 11; maintaining a stable high-temperature environment to provide an auxiliary heat source during combustion, ensuring continuous combustion; and preventing incomplete combustion, thereby improving the incinerator's efficiency and pollutant control capabilities. By adding the auxiliary burner 23, the incinerator can maintain stable operating performance under low load or when the fuel is difficult to burn. More preferably, the number of auxiliary burners 23 is one or more. The number of auxiliary burners 23 can be 1-3.

[0040] When there is one or more auxiliary burners 23, their distribution is as follows:

[0041] Example 1:

[0042] like Figure 1 As shown, in a preferred embodiment, when there is only one auxiliary burner 23, the auxiliary burner 23 is located in the lower middle position in the axial direction of the furnace 11. The upper part of the furnace 11 is close to the liquid inlet ignition device 3, and 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 set near the bottom so that the radioactive organic waste liquid or fuel is raised to its auto-ignition point and a stable high-temperature environment is maintained before entering the lower space of the furnace 11.

[0043] Example 2:

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

[0045] Through the above structural design, to ensure complete combustion, the entire furnace 11 is first preheated by the auxiliary burner 23. The internal temperature of the furnace 11 is monitored by temperature feedback signals from multiple thermocouples 22. When the expected preheating temperature (700℃-800℃) for radioactive organic waste liquid treatment is reached, the auxiliary burner 23 is shut off, completing the preheating. Subsequently, the radioactive organic waste liquid is introduced and ignited through the liquid inlet ignition device 3. During the combustion stage, the heating supply to the furnace 11 is adjusted by switching the auxiliary burner 23 on and off based on the temperature feedback signals from multiple thermocouples 22, maintaining the furnace 11 temperature at 800℃-1000℃, thereby ensuring complete combustion of the radioactive organic waste liquid. The design of directly fixing the auxiliary burner 23 to the incinerator body 1, compared to the traditional external auxiliary combustion preheating incinerator scheme, allows for single-person electric control of the entire radioactive organic waste liquid incineration process. The device structure is simple, greatly reducing the difficulty and workload, improving efficiency while avoiding excessive consumption of manpower and resources, effectively saving resources.

[0046] In some preferred embodiments, the auxiliary combustion device 2 further includes a sight glass 24 and a second air inlet 25. The sight glass 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, used to monitor the combustion flame inside the furnace 11. The second air inlet 25 is fixedly installed on the sight glass 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 24. Preferably, the second air inlet 25 is designed as a compressed air inlet to supplement air into the furnace 11 and blow away fly ash in the pipe of the sight glass 24 through airflow, preventing the sight glass 24 from accumulating fly ash and obstructing the view.

[0047] In some preferred embodiments, the auxiliary combustion device 2 further includes a first air inlet 21 for supplying air to the furnace 11 for combustion. During the combustion phase, the airflow through the first air inlet 21 is adjusted based on temperature feedback signals from multiple thermocouples 22, thereby regulating the combustion conditions within the furnace 11. Simultaneously, the airflow through the first air inlet 21 is adjusted in conjunction with the on / off status of the auxiliary burner 23 and the heating status, thereby ensuring complete combustion of the radioactive organic waste liquid within the furnace 11.

[0048] In some preferred embodiments, such as Figures 1-3As shown, the liquid inlet ignition device 3 includes an organic waste liquid inlet 33, a fourth air inlet 34, and an igniter 35, all located at the top center of the incinerator body 1 and arranged sequentially. These components are aligned on a straight line, with the axis of the fourth air inlet 34 coinciding with the axis of the incinerator body 1, and the straight line coinciding with the diameter of the incinerator body 1. The fourth air inlet 34 provides sufficient air supply during combustion to promote complete combustion of the 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, 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 is remotely controlled to start or stop, used to ignite radioactive organic waste liquid or fuel entering the furnace 11.

[0050] In some preferred embodiments, such as Figure 1 As shown, the liquid inlet ignition device 3 also includes a combustion nozzle 32, so as to... Figure 1 With the incinerator in its operational state as the reference, the incineration nozzle 32 is located below the fourth air inlet 34 and is connected to both the fourth air inlet 24 and the organic waste liquid inlet 33. Radioactive organic waste liquid and the air required for combustion are mixed at the incineration nozzle 32 through the organic waste liquid inlet 33 and the fourth air inlet 24, and then conveyed into the furnace 11 through the incineration nozzle 32. Preferably, the incineration nozzle 32 is a dual-flow atomizing nozzle. More preferably, the incineration nozzle 32 is made of a metal material such as 304 stainless steel.

[0051] In some preferred embodiments, such as 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 the air required for combustion. The axis of the port of the third air inlet 31 located outside the incinerator body 1 is 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 axis of the port 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 flue gas outlet 15, located at the tail end of the furnace 11 and connected to its tail end, for discharging the flue gas generated during the incineration process, ensuring that the exhaust gas generated during 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 enable 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 by flanges, which also facilitates the safe transport of radioactive organic waste liquid under high temperature conditions; the flue gas outlet 15 is connected to the furnace 11 by flanges 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-mentioned incinerator, comprising the following steps:

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

[0056] Incinerator preheating step S2: The furnace chamber 11 is preheated by turning on the auxiliary burner 23. After observing the temperature feedback information of multiple thermocouples 22, the temperature is preheated to a suitable temperature for the combustion of mixed organic waste liquid (700℃-800℃). Then, the auxiliary burner 23 is turned off to complete the preheating.

[0057] Incineration ignition step S3: Open the third air inlet 31, and simultaneously open the organic waste liquid inlet 33 and the fourth air inlet 34. The viscosity-reduced mixed organic waste liquid is introduced into the organic waste liquid inlet 33 and then fed into the furnace 11 through the incineration nozzle 32. In the incineration nozzle 32, it mixes with the air from the third air inlet 31. 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 high-temperature combustion occurs within the furnace 11. At this time, the combustion flame within the furnace 11 can be observed through the sight glass 24.

[0058] Continuous incineration step S4: By adjusting the air volume of the first air inlet 21 based on the temperature feedback information from multiple thermocouples 22, the combustion situation in the furnace 11 is adjusted. At the same time, the switch of the auxiliary burner 23 is adjusted to regulate the temperature in the furnace 11, so that the 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 2 seconds.

[0059] By incinerating the mixed organic waste liquid, the radioactive organic waste liquid is treated and some radioactive elements are fixed. The incinerator has a radioactive organic waste liquid treatment capacity of 2L / h.

[0060] The aforementioned incinerator can be paired with subsequent exhaust gas treatment devices to achieve better purification.

[0061] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope 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 disposed 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 includes a furnace chamber for providing combustion space; the incinerator body also includes a flue gas outlet, which is located at the tail end of the furnace chamber and connected to the tail end opening. The liquid inlet ignition device includes an organic waste liquid inlet, a fourth air inlet, and an igniter, all located at the center of the top of the incinerator body and arranged sequentially. 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 the air can be ignited by the igniter when they enter the furnace. The liquid inlet ignition device also includes a third air inlet. The pipe of the third air inlet is curved, and the axis of its port located outside the incinerator body is aligned with the axis of the ports of the organic waste liquid inlet, the fourth air inlet, and the igniter. The third air inlet, the organic waste liquid inlet, the fourth air inlet, and the igniter are connected to the furnace via flanges. 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 the at least one auxiliary burner are respectively embedded inside the furnace. The multiple thermocouples are located on the same side of the side wall of the incinerator body, evenly distributed at different heights along the axial direction of the furnace. Temperature sensors are mounted on the multiple thermocouples. At least one thermocouple is positioned at a height higher than the auxiliary burner in the axial direction of the furnace, and at least one thermocouple is positioned at a height lower than the auxiliary burner in the axial direction of the furnace. The at least one auxiliary burner is located on an opposite side of the multiple thermocouples and operates based on temperature information from the temperature sensors. The incinerator is equipped with a preheating stage and a combustion stage. During the preheating stage, at least one auxiliary burner is turned on, and when the temperature information from the temperature sensor reaches the preheating temperature, the at least one auxiliary burner is turned off. The auxiliary combustion device also includes a first air inlet. During the combustion stage, the air volume of the first air inlet is adjusted according to the temperature information from the temperature sensor, combined with the on / off status of the at least one auxiliary burner and the heating status. The auxiliary combustion device also includes a sight glass and a second air inlet. The second air inlet is fixedly installed on the sight glass, and the axial direction of the second air inlet is perpendicular to the axial direction of the sight glass.

2. The incinerator for treating radioactive organic waste liquid according to claim 1, characterized in that, When there is one auxiliary burner, the auxiliary burner is located in the lower middle part of the furnace.

3. The incinerator for treating radioactive organic waste liquid according to claim 1, characterized in that, When there are multiple auxiliary burners, the multiple auxiliary burners are evenly distributed in the middle and lower part of the furnace.

4. The incinerator for treating radioactive organic waste liquid according to claim 2 or 3, characterized in that, The auxiliary burner is an electric heater.

5. The incinerator for treating radioactive organic waste liquid according to claim 4, characterized in that, The auxiliary burner is one of the following: a resistance heater, an electric heating tube, an infrared heater, or an electric arc heater.

6. The incinerator for treating radioactive organic waste liquid according to claim 1, characterized in that, The furnace chamber is provided with a first heat insulation layer, a second heat insulation layer and a furnace shell in sequence on the outside. 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.

7. An incineration method for treating radioactive organic waste liquid using an incinerator according to any one of claims 1-6, characterized in that, Includes the following steps: During the preheating stage, at least one auxiliary burner is turned on to preheat the furnace. The temperature inside the furnace is monitored by the temperature feedback information from the multiple thermocouples. Once the temperature inside the furnace has been preheated to the expected temperature, the at least one auxiliary burner is turned off to complete the preheating. The third air inlet is opened, and the organic waste liquid inlet and the fourth air inlet are opened simultaneously to introduce the radioactive organic waste liquid and the air required for combustion. The radioactive organic waste liquid is then ignited by the igniter, causing it to burn in the furnace. During the combustion stage, the air volume at the first air inlet is adjusted by using the temperature feedback information from the multiple thermocouples, combined with the on / off status and heating status of the at least one auxiliary burner, in order to regulate the combustion status and temperature within the furnace.

8. The incineration method according to claim 7, characterized in that, Prior to the preheating stage, kerosene is added to the radioactive organic waste liquid to adjust its viscosity and overall calorific value.

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