Supercritical water reactor and its feed assembly

Abstract

This invention discloses a feed assembly for a supercritical water reactor. The feed assembly, disposed on the supercritical water reactor, includes: an oxygen pipe with an oxygen inlet and an oxygen outlet at its two ends; an organic solution pipe coaxially arranged with the oxygen pipe and located inside the organic solution pipe; and a cooling water pipe assembly sleeved outside the organic solution pipe, providing a channel for cooling water used to cool the oxygen pipe and the organic solution pipe. The organic solution pipe has a solution outlet at its end, and the oxygen pipe extends from both ends into the organic solution pipe, with the oxygen outlet located outside the organic solution pipe, for introducing oxygen and organic solution into the supercritical water reactor from different positions along the axial direction of the oxygen pipe. This invention also discloses a supercritical water reactor.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of supercritical water oxidation technology, specifically to a supercritical water reactor and its feed assembly. Background Technology

[0002] Supercritical water refers to water in a special state where the temperature exceeds 374℃ and the pressure exceeds 22 MPa. It is water in which the density of liquid water expanding due to high temperature is exactly the same as the density of water vapor compressed due to high pressure. In the supercritical water state, organic matter and oxygen are completely miscible and undergo rapid oxidation reactions, causing the organic matter to be oxidized and decomposed into carbon dioxide, water, and inorganic salts. This supercritical water oxidation technology has a highly efficient treatment capability for toxic and recalcitrant organic waste.

[0003] The supercritical water reactor is the core equipment for supercritical water oxidation reactions. Organic matter is inorganicized within the supercritical water reactor under high temperature, high pressure, and high oxygen concentration, releasing a large amount of heat. The stringent conditions required for supercritical water oxidation reactions place extremely high demands on the reactor's safety protection measures. The design of each component within the supercritical water reactor affects the stability and safety of its operation. Specifically, the feed pipe is used to inject the organic raw materials to be reacted and oxygen into the supercritical water reactor for mixing. To ensure the safety characteristics of the feed pipe, its structure needs to be optimized. Summary of the Invention

[0004] To address at least one aspect of the aforementioned technical problems, the present invention provides a feed assembly for a supercritical water reactor. The feed assembly is disposed on the supercritical water reactor and includes: an oxygen pipe with an oxygen inlet and an oxygen outlet at its two ends, providing a channel for oxygen to enter the supercritical water reactor; an organic solution pipe coaxially arranged with the oxygen pipe and located inside the organic solution pipe, providing a channel for organic solution to enter the supercritical water reactor; and a cooling water pipe assembly sleeved outside the organic solution pipe, providing a channel for cooling water to cool the oxygen pipe and the organic solution pipe. The organic solution pipe has a solution outlet at its end, and both ends of the oxygen pipe extend out of the organic solution pipe. The oxygen outlet is located outside the organic solution pipe, allowing the oxygen and organic solution to be introduced into the supercritical water reactor from different positions along the axial direction of the oxygen pipe.

[0005] According to another aspect of the present invention, a supercritical water reactor is also provided. The supercritical water reactor includes: a reactor body; and a feed assembly according to the above embodiments, disposed at the bottom of the reactor body, wherein the oxygen outlet and solution outlet of the feed assembly extend into the interior of the reactor body, and the feed assembly is configured to deliver oxygen and an organic solution into the reactor body. Attached Figure Description

[0006] Other objects and advantages of the invention will become apparent from the following description of embodiments of the invention with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the invention.

[0007] Figure 1 This is a schematic diagram of the structure of a feeding assembly according to an embodiment of the present invention;

[0008] Figure 2 yes Figure 1 A magnified view of the feed assembly;

[0009] Figure 3 yes Figure 1 Schematic diagrams of the feed assembly from different perspectives;

[0010] Figure 4 This is a schematic diagram of the structure of a supercritical water reactor according to an embodiment of the present invention;

[0011] Figure 5 This is a schematic diagram of the overall structure of a supercritical water reactor according to an embodiment of the present invention.

[0012] It should be noted that the accompanying drawings are not necessarily drawn to scale, but are shown only in a schematic manner without affecting the reader's understanding. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only one embodiment of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the described embodiments of this application without creative effort are within the scope of protection of this application.

[0014] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application should have the ordinary meaning understood by a person with ordinary skill in the art to which this application pertains. Where the terms "first," "second," etc., are used throughout the text, they are used only to distinguish similar objects and should not be construed as indicating or implying their relative importance, order of precedence, or implicitly specifying the number of technical features indicated. It should be understood that the data described by "first," "second," etc., can be interchanged where appropriate. Where "and / or" appears throughout the text, it means including three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. Furthermore, for ease of description, spatial relative terms such as "above," "below," "top," "bottom," etc., may be used here, only to describe the spatial positional relationship between one device or feature as shown in the figure and other devices or features. It should be understood that this also includes different orientations in use or operation besides those shown in the figure.

[0015] An embodiment of the present invention provides a feed assembly for a supercritical water reactor. The feed assembly is disposed on the supercritical water reactor and is used to transport oxygen and the organic solution to be reacted into the interior of the supercritical water reactor, so that the organic solution and oxygen can undergo an oxidation reaction in the supercritical water environment inside the supercritical water reactor to convert organic matter into inorganic salts, carbon dioxide and water.

[0016] like Figures 1 to 3 As shown, the feeding assembly in this embodiment includes an oxygen pipe 10, an organic solution pipe 20, and a cooling water pipe assembly 30. The oxygen pipe 10 has an oxygen inlet 11 and an oxygen outlet 12 at both ends, providing a channel for oxygen to enter the supercritical water reactor. The organic solution pipe 20 is coaxially arranged with the oxygen pipe 10 and is located inside the organic solution pipe 20, providing a channel for the organic solution to enter the supercritical water reactor. The cooling water pipe assembly 30 is fitted outside the organic solution pipe 20, providing a channel for cooling water. The cooling water is used to cool the oxygen pipe 10 and the organic solution pipe 20, thereby preventing excessively high temperatures inside the pipes and reducing the temperature of the inlet mixing zone of the supercritical water reactor. This prevents reactants from reacting inside the pipes and near the pipe outlet, thus ensuring the safety characteristics of the feeding assembly.

[0017] It should be noted that the feed assembly includes an inlet end and an outlet end. Oxygen inlet 11, solution inlet 21, and cooling water inlet 34 are all located at the inlet end, while oxygen outlet 12, solution outlet 22, and cooling water outlet 35 are all located at the outlet end. When the feed assembly is installed on a supercritical water reactor, the inlet end of the feed assembly is located outside the supercritical water reactor, while the outlet end is located inside the supercritical water reactor, thereby enabling the delivery of oxygen and organic solution into the supercritical water reactor.

[0018] In this embodiment, the feeding assembly is configured as a double-layered pipe, with the inner layer being an oxygen pipe 10 and the outer layer being an organic solution pipe 20. On the one hand, it can realize the transportation of oxygen and organic solution. On the other hand, the outer organic solution pipe 20 can act as a safety barrier, ensuring that under extreme working conditions such as corrosion by inorganic acids or salts generated by the supercritical water oxidation reaction, the high-temperature and high-pressure reactants and products are contained within the outer pipe, thus preventing the occurrence of safety accidents.

[0019] In addition, in this embodiment, a cooling water pipe 32 is provided outside the double-layer sleeve, so that the oxygen and organic solution are cooled down by the flowing cooling water, thereby reducing the temperature of the outlet end area of ​​the feed assembly, avoiding the oxidation reaction of oxygen and organic matter at the outlet end of the feed assembly, limiting the reaction area of ​​the supercritical water oxidation reaction, controlling the high temperature area of ​​the oxidation reaction within the reaction zone of the supercritical water reactor, ensuring that the feed assembly does not experience overheating, reducing the probability of safety accidents, and reducing the manufacturing and operation difficulty of the supercritical water reactor.

[0020] like Figure 1 and Figure 2 As shown, in this embodiment, the organic solution pipe 20 has a solution outlet 22 at its end, the two ends of the oxygen pipe 10 extend out of the organic solution pipe 20, and the oxygen outlet 12 is located outside the organic solution pipe 20, thereby introducing oxygen and organic solution into the supercritical water reactor from different positions along the axial direction of the oxygen pipe 10.

[0021] Compared to the traditional feed pipe that aligns the outlet ends of the oxygen pipe 10 and the organic solution pipe 20, in this embodiment, the length of the oxygen pipe 10 is greater than the length of the organic solution pipe 20. The oxygen pipe 10 extends from the solution outlet 22 of the organic solution pipe 20 to the outside, so that the oxygen outlet 12 is far away from the solution outlet 22. This avoids the oxygen and organic solution being output from the same position in the axial direction of the feed assembly, and prevents the oxygen and organic solution from mixing near the solution outlet 22 and flowing back into the feed assembly after mixing. This effectively avoids the safety threat to the feed assembly caused by the mixing of oxygen and organic solution in the feed assembly.

[0022] Furthermore, such as Figure 1 and Figure 2 As shown, an oxygen inlet 11 is formed at one end of the oxygen pipe 10, and an oxygen outlet 12 is located near the other end of the oxygen pipe 10. The oxygen outlet 12 is located on the side wall of the oxygen pipe 10 and is used to introduce oxygen into the supercritical water reactor along the radial direction of the oxygen pipe 10. When the organic solution output from the solution outlet 22 of the organic solution pipe 20 diffuses to the vicinity of the oxygen outlet 12, it mixes with the oxygen output from the oxygen outlet 12, so that the oxygen can mix with the organic solution immediately after flowing out of the oxygen outlet 12, thus improving the mixing effect of oxygen and organic solution in the supercritical water reactor.

[0023] Compared to traditional feed pipes where the outlet is located at the end of the pipe, in this embodiment, the oxygen outlet 12 is located on the side wall of the oxygen pipe 10 away from the solution outlet 22. This not only improves the mixing effect of oxygen and organic solution, but also prevents reactants or products mixed near the oxygen outlet 12 from flowing back into the oxygen pipe 10.

[0024] like Figure 1 As shown, the oxygen pipe 10 is provided with a fixing part 13, which protrudes from the outside of the oxygen pipe 10. One end of the organic solution pipe 20 is sealed and connected to the fixing part 13, and the other end forms a solution outlet 22, so that a gap is formed between the organic solution pipe 20 and the oxygen pipe 10, so as to form a channel for organic solution between the organic solution pipe 20 and the oxygen pipe 10.

[0025] Specifically, the fixing part 13 is located on the oxygen pipeline 10 near the oxygen inlet 11. The fixing part 13 is integrally formed with the oxygen pipeline 10, and the organic solution pipeline 20 is sealed and connected to the fixing part 13, which can increase the stability of the connection between the oxygen pipeline 10 and the organic solution pipeline 20 and improve the structural strength. The sealed connection between the organic solution pipeline 20 and the oxygen pipeline 10 can be achieved by welding.

[0026] Furthermore, a solution inlet 21 is provided on the side wall of the organic solution pipe 20 to introduce organic solution into the organic solution pipe 20. Specifically, the solution inlet 21 can be located near the fixing part 13, and the organic solution outlet is formed at the end of the organic solution pipe 20 so that the organic solution is transported through the organic solution pipe 20 to the inside of the supercritical water reactor.

[0027] like Figure 1As shown, in some embodiments, the cooling water pipe assembly 30 includes a pipe base 31 and a cooling water pipe 32. Both the pipe base 31 and the cooling water pipe 32 are sleeved outside the organic solution pipe 20. The end of the pipe base 31 furthest from the solution outlet 22 is sealed to the outer wall of the organic solution pipe 20, and the end of the pipe base 31 closest to the solution outlet 22 is sealed to the cooling water pipe 32. A cooling water flow channel is formed between the cooling water pipe 32 and the organic solution pipe 20 to cool the organic solution pipe 20 and the oxygen pipe 10. In this embodiment, by fixing the pipe base 31 to the organic solution pipe 20 and then connecting the cooling water pipe 32 to the pipe base 31, the stability of the connection between the cooling water pipe 32 and the organic solution pipe 20 can be improved, thereby increasing the structural strength of the feeding assembly.

[0028] In this embodiment, a cooling water pipe 32 is provided outside the organic solution pipe 20. The cooling water flowing through the cooling water pipe 32 can reduce the temperature of the organic solution pipe 20 to below the reaction temperature at which the organic solution and oxygen cannot undergo supercritical water oxidation reaction, thereby preventing the organic solution and oxygen from undergoing oxidation reaction in the feeding assembly.

[0029] In addition, the supercritical water oxidation reaction of organic matter produces a large amount of inorganic acids and salts. Under the condition of continuous operation of the supercritical water reactor, the oxygen pipeline 10 and / or organic solution pipeline 20 of the feed assembly may be corroded. Under extreme conditions, high temperature and high pressure reactants or products may pass through the damaged inner oxygen pipeline 10 and / or organic solution pipeline 20. At this time, the outer cooling water pipeline 32 can act as a safety barrier, containing the danger inside the pipeline and preventing dangerous high temperature and high pressure reactants or products from being released into the external space.

[0030] In some embodiments, a cooling water outlet 35 is formed at the end of the cooling water pipe 32 away from the pipe base 31. The cooling water outlet 35 of the cooling water pipe 32 is aligned with the solution outlet 22, so that the cooling water and the organic solution are transported together into the supercritical water reactor. The cooling water can start the cooling effect, and at the same time, the cooling water can serve as a carrier for the supercritical water oxidation reaction in the supercritical water reactor.

[0031] Optionally, the cooling water inlet 34 can be installed on the cooling water pipe 32 or on the pipe base 31 to introduce cooling water into the cooling water pipe 32. When the cooling water inlet 34 is installed on the pipe base 31, there is a gap between the pipe base 31 and the organic solvent pipe 20, and the pipe base 31 is connected to the cooling water pipe 32 to form a cooling water flow channel. The pipe base 31 is provided with a through hole that connects to the inside of the pipe base 31, through which cooling water can be introduced into the cooling water pipe 32.

[0032] In some embodiments, the inner diameter of the pipe base 31 is the same as that of the cooling water pipe 32, and the inner diameters of the pipe base 31 and the cooling water pipe 32 are larger than the outer diameter of the organic solution pipe 20, thereby forming gaps between the pipe base 31 and the organic solution pipe 20 and between the cooling water pipe 32 and the organic solution pipe 20, to serve as flow channels for cooling water.

[0033] like Figure 1 and Figure 3 As shown, the cooling water pipe assembly 30 in this embodiment also includes an inlet pipe 33. The inlet pipe 33 is sealed to the pipe base 31 and communicates with a through hole on the pipe base 31 for inputting cooling water into the cooling water pipe 32. In this embodiment, the inlet pipe 33 is connected to the pipe base 31, which facilitates connection to an external cooling water source, thereby enabling the input of cooling water into the cooling water pipe 32.

[0034] Furthermore, the water inlet pipe 33 includes a first water inlet pipe 331 and a second water inlet pipe 332. The first water inlet pipe 331 is sealed to the pipe base 31 and communicates with a through hole. The second water inlet pipe 332 is connected to the first water inlet pipe 331, and an inlet is formed at the end of the second water inlet pipe 332 away from the first water inlet pipe 331. The inlet is used to introduce cooling water into the cooling water pipe 32.

[0035] In some embodiments, the diameter of the first inlet pipe 331 is larger than that of the second inlet pipe 332, thereby improving the stability and reliability of the connection between the inlet pipe 33 and the pipe base 31. Furthermore, the inner diameters of the first inlet pipe 331, the second metal pipe, and the through hole can be the same, thereby allowing cooling water to flow smoothly into the cooling water pipe 32.

[0036] like Figure 1 As shown, the second water inlet pipe 332 is bent, with a portion parallel to the oxygen pipeline 10 and the other portion coaxial with the first water inlet pipe 331. In some embodiments, the first water inlet pipe 331 is perpendicular to the oxygen pipeline 10, and the second water inlet pipe 332 is a 90-degree bend, with a portion parallel to the oxygen pipeline 10 and the other portion perpendicular to the oxygen pipeline 10. This ensures that the water inlet direction is the same as the oxygen inlet direction, avoiding the long water inlet pipe 33 being arranged along the radial direction of the oxygen pipeline 10 and affecting other equipment or pipelines, and reducing the area occupied by the water inlet pipe 33.

[0037] By employing the feeding assembly in the above embodiments of the present invention, the safety performance of the feeding assembly is improved through the multi-layer sleeve structure design and the design of the oxygen outlet 12, and multiple barriers are provided for the inner pipeline to reduce the probability of safety accidents.

[0038] Embodiments of the present invention also provide a supercritical water reactor. Figure 4A schematic diagram of a supercritical water reactor according to an embodiment of the present invention is shown.

[0039] like Figure 4 As shown, the supercritical water reactor includes a reactor body 100 and a feed assembly 200 as described in any of the above embodiments. The feed assembly 200 is disposed at the bottom of the reactor body 100, and the oxygen outlet 12 and solution outlet 22 of the feed assembly 200 extend into the interior of the reactor body 100. The feed assembly 200 is configured to deliver oxygen and organic solution into the reactor body 100.

[0040] In this embodiment, the feed assembly 200 is positioned at the bottom of the supercritical water reactor, allowing oxygen and organic waste to enter the reaction zone 110 from the bottom up through the feed assembly 200 and rise along the reactor's interior. This avoids the accumulation of reactants at the bottom, which could lead to excessively high temperatures. Traditional supercritical water reactors place the feed assembly 200 at the top of the reactor. If unreacted oxygen is not completely reacted, it can diffuse upwards to the top of the reactor and potentially enter the feed pipe. This embodiment of the invention places the feed assembly 200 at the bottom of the reactor, preventing unreacted oxygen from entering the feed assembly 200's pipes and improving the safety performance of the supercritical water reactor.

[0041] Specifically, the feed assembly 200 is installed on the end cap of the reactor body 100. The end cap has mounting holes into which the feed assembly 200 is inserted and fixed to the end cap by welding. Specifically, the pipe base 31 can be welded to the end cap to achieve a sealed connection between the feed assembly 200 and the end cap. The oxygen outlet 12, solution outlet 22, and cooling water outlet 35 of the feed assembly 200 all extend into the reactor interior, thus enabling the feeding of the supercritical water reactor.

[0042] like Figure 4 As shown, a heating component 120 is installed outside the reactor body 100. The heating component 120 is wrapped around the outside of the reactor body 100 and is used to heat the supercritical water reactor during the ignition process, so that the inside of the supercritical water reactor reaches the preset initial temperature. This allows the reaction raw materials such as sucrose solution to undergo an oxidation reaction with oxygen, releasing heat to preheat the supercritical water reactor and thus bring the inside of the supercritical water reactor to the operating temperature. Once the supercritical water reactor reaches the operating temperature, the organic waste to be treated can be transported into the supercritical water reactor.

[0043] It should be noted that the feed assembly 200 used in this embodiment can be used to transport reaction raw materials such as sucrose solution required for internal preheating into the supercritical water reactor, or to transport organic waste to be treated into the supercritical water reactor. That is, the organic solution pipeline 20 is used to transport reaction raw materials for internal preheating or organic waste to be treated.

[0044] In this embodiment, the oxygen inlet 11 of the feed assembly 200 is connected to the oxygen storage container 300 to deliver oxygen from the oxygen storage container 300 to the reactor. The solution inlet 21 is connected to the organic solution storage container 400 to deliver reaction raw materials for internal preheating or organic waste to be treated from the organic solution storage container 400 to the reactor. The cooling water inlet 34 is connected to the cooling water source 500 to provide cooling water.

[0045] In this embodiment, a cooling assembly 130 is also provided outside the reactor body 100. The cooling assembly 130 is wrapped around the outside of the reactor body 100 and is used to cool the outer shell of the reactor body 100. In addition, a discharge pipe 140 is provided at the bottom of the reactor body 100. The discharge pipe 140 is connected to the inside of the reactor body 100 and is used to discharge the salt residue generated after the organic matter in the reactor reacts with oxygen.

[0046] Figure 5 A schematic diagram of the overall structure of a supercritical water reactor according to an embodiment of the present invention is shown.

[0047] like Figure 5 As shown, the supercritical water reactor in this embodiment includes an inner containment vessel 111, an outer containment vessel 112, and a reactor body disposed within the inner containment vessel 111. A reaction zone 110 is provided inside the reactor body. Oxygen and organic waste are transported to the reaction zone 110 through a feed assembly 200 at the bottom of the reactor to react. A pipe 151 is also provided at the bottom of the supercritical water reactor, connecting to the reaction zone 110 to supply cooling water to the reactor. The cooling water is used to cool the products of the oxygen and organic waste oxidation reaction, as well as components such as the feed assembly, and also serves as a carrier for the supercritical water oxidation reaction.

[0048] A cooler (not shown in the figure) is installed on the reactor body to cool the outer shell of the reactor body. The cooler is connected to pipe 153, which supplies cooling water to the cooler.

[0049] An evaporation tank 113 and a condensation chamber 114 are provided between the inner containment 111 and the outer containment 112. The evaporation tank 113 is located below the condensation chamber 114. An exhaust pipe 115 is provided on the top of the evaporation tank 113. The exhaust pipe is connected to the condensation chamber 114 and is higher than the liquid level in the condensation chamber 114 to prevent liquid in the condensation chamber 114 from entering the evaporation tank 113 through the exhaust pipe 115.

[0050] The inner containment vessel 111 is connected to the evaporation tank 113 via a discharge pipe 160. A pressure reducing device 161 is installed on the discharge pipe 160. Products generated from the oxidation reaction of organic waste with oxygen enter the evaporation tank 113 via the discharge pipe 160. In the evaporation tank 113, non-condensable gases (e.g., carbon dioxide and residual oxygen) then enter the top condensation chamber 114 and are discharged as exhaust gas. Liquid products are purified by evaporating into water vapor in the bottom evaporation tank 113. The water vapor enters the top condensation chamber 114 through an exhaust pipe 115 and is cooled into distilled water through a cooling pipe 117 in the condensation chamber 114. The distilled water is discharged as purified liquid through a drain pipe 180.

[0051] Specifically, a circulation pipe 116 is provided inside the evaporation tank 113. The circulation pipe 116 is connected to a cooler on the reactor body via pipes 152 and 154 to provide cooling water for cooling the liquid products in the evaporation tank 113. The circulation pipe 116 is also connected to pipe 155. The cooling water in the cooler exchanges heat with the outer shell of the reactor body, then enters the circulation pipe 116 through pipes 152 and 154 to further cool the liquid products in the evaporation tank 113. Finally, the cooling water in the circulation pipe 116 is discharged through pipe 155.

[0052] A drain pipe 180 is installed at the bottom of the condenser chamber 114. A cooling pipe 117 is installed inside the condenser chamber 114. The inlet and outlet of the cooling pipe 117 are connected to pipes 156 and 157, respectively. Pipe 156 supplies cooling water to the cooling pipe 117. The cooling water is used to exchange heat with the water vapor entering the condenser chamber 114, causing the water vapor to condense into distilled water. The distilled water is discharged as a purified liquid through the drain pipe 180, while the cooling water in the cooling pipe 117 after heat exchange is discharged through pipe 157.

[0053] The top of the condenser 114 is also provided with an exhaust pipe 170 for discharging non-condensable gases (e.g., carbon dioxide and residual oxygen) that enter the condenser 114.

[0054] When using the supercritical water reactor in this embodiment to treat radioactive organic waste, the supercritical water reactor first needs to be preheated using the heating component 120 to reach its initial operating temperature. Next, liquid oxygen is vaporized in a water bath vaporizer to reach a predetermined temperature, and then conveyed to the feed assembly 200 via a buffer tank and a one-way valve. Simultaneously, the radioactive organic waste to be treated is conveyed to the feed assembly 200, which delivers the oxygen and radioactive organic waste into the reactor. The mixed reactants rise under pressure to the reaction zone 110, where an oxidation reaction occurs, causing the radioactive organic waste to decompose and transform into carbon dioxide, water, and inorganic salts, releasing a large amount of heat. The radionuclides in the radioactive organic waste are present in the inorganic salts.

[0055] The products generated from the oxidation reaction of radioactive organic waste are transported from discharge pipe 160 to evaporation tank 113 via pressure reducing device 161. Inside evaporation tank 113, non-condensable gases (such as carbon dioxide and residual oxygen) enter the top condensation chamber 114 through exhaust pipe 115 and are then discharged as tail gas from exhaust pipe 170. Liquid products are purified by evaporating into water vapor within evaporation tank 113. The water vapor enters the top condensation chamber 114 through exhaust pipe 115 and is cooled into distilled water through cooling pipe 117 within condensation chamber 114. The distilled water is discharged as purified liquid from drain pipe 180. After evaporation, the liquid products are concentrated into a slurry, and radionuclides are periodically discharged from the bottom of evaporation tank 113 in slurry form from discharge pipe 140.

[0056] The supercritical water reactor in this embodiment of the invention has a simple structure and can completely oxidize organic waste, resulting in the complete separation of radioactive nuclides from the organic waste. Furthermore, the optimized design of the feed assembly improves the reactor's safety performance and eliminates safety risks.

[0057] Regarding the embodiments of the present invention, it should also be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0058] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A feed assembly for a supercritical water reactor, characterized in that, The feed assembly is disposed on the supercritical water reactor, and the feed assembly includes: An oxygen pipeline, which is provided with an oxygen inlet and an oxygen outlet, is configured to introduce oxygen radially into the supercritical water reactor. An organic solution pipeline, wherein the oxygen pipeline is located within the organic solution pipeline, and the organic solution pipeline is configured to be fixedly connected to the oxygen pipeline to provide a channel for the organic solution to enter the supercritical water reactor; A cooling water pipe assembly, sleeved outside the organic solvent pipe, provides a channel for cooling water used to cool the oxygen pipe and the organic solvent pipe; wherein... The organic solution pipe has a solution outlet at one end, and the two ends of the oxygen pipe extend out of the organic solution pipe. The oxygen outlet is located outside the organic solution pipe and is used to introduce the oxygen and organic solution into the supercritical water reactor from different positions along the axial direction of the oxygen pipe. This is to prevent the oxygen and organic solution from mixing near the solution outlet and flowing back into the feed assembly after mixing, and to avoid the mixing of oxygen and organic solution in the feed assembly from threatening the safety of the feed assembly. The oxygen outlet is located on the side wall of the oxygen pipe and is used to introduce the oxygen into the supercritical water reactor in the radial direction of the oxygen pipe. This allows the organic solution output from the solution outlet to diffuse to the vicinity of the oxygen outlet and mix with the oxygen output from the oxygen outlet. As a result, the oxygen can mix with the organic solution as soon as it flows out of the oxygen outlet, thereby improving the mixing effect of the oxygen and the organic solution. Furthermore, the oxygen outlet is located on the side wall of the oxygen pipe away from the solution outlet, which can also prevent the oxygen and organic solution or their product mixed near the oxygen outlet from flowing back into the oxygen pipe.

2. The feeding assembly according to claim 1, characterized in that, The oxygen pipeline is provided with a fixing part, which protrudes from the outside of the oxygen pipeline; The other end of the organic solution pipe is sealed to the fixing part to form an organic solution channel between the organic solution pipe and the oxygen pipe.

3. The feeding assembly according to claim 2, characterized in that, The organic solution pipeline has a solution inlet on its side wall.

4. The feeding assembly according to claim 1, characterized in that, The cooling water pipe assembly includes: A pipe base is fitted over the organic solution pipe, with one end of the pipe base away from the solution outlet sealed to the organic solution pipe; A cooling water pipe is fitted outside the organic solution pipe. The cooling water pipe is sealed and connected to the end of the pipe base near the solution outlet, and a cooling water flow channel is formed between the cooling water pipe and the organic solution pipe.

5. The feeding assembly according to claim 4, characterized in that, The cooling water outlet of the cooling water pipe is aligned with the solution outlet.

6. The feeding assembly according to claim 4, characterized in that, There is a gap between the pipe base and the organic solution pipe, and the pipe base is connected to the cooling water pipe to form a cooling water flow channel; The pipe base is provided with a through hole, which connects to the inside of the pipe base.

7. The feeding assembly according to claim 6, characterized in that, The cooling water pipe assembly also includes: A water inlet pipe is sealed to the pipe base and is connected to the through hole for supplying cooling water to the cooling water pipe.

8. The feeding assembly according to claim 7, characterized in that, The water inlet pipe includes: The first water inlet pipe is sealed to the pipe base and communicates with the through hole; The second water inlet pipe is connected to the first water inlet pipe. The end of the second water inlet pipe away from the first water inlet pipe has a water inlet, which is used to introduce cooling water into the cooling water pipe.

9. The feeding assembly according to claim 8, characterized in that, The diameter of the first water inlet pipe is larger than that of the second water inlet pipe.

10. The feeding assembly according to claim 8, characterized in that, The second water inlet pipe is bent, with a portion of the second water inlet pipe parallel to the oxygen pipe and the other portion coaxial with the first water inlet pipe.

11. A supercritical water reactor, characterized in that, include: Reactor body; The feed assembly according to any one of claims 1-10 is disposed at the bottom of the reactor body, the oxygen outlet and solution outlet of the feed assembly extending into the interior of the reactor body, and the feed assembly is configured to deliver oxygen and organic solution into the reactor body.

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