Sodium aerosol fluidization generation device and method

Abstract

The invention discloses a sodium aerosol fluidization generation device and method, and belongs to the technical field of reactor devices. According to the device disclosed by the invention, by arranging the raw material conveying system, the temperature control system and the sodium aerosol generator, inert gas and liquid sodium in the raw material conveying system are directly placed in the sodium aerosol generator to be taken out and react with oxidizing gas in the raw material conveying system to generate sodium aerosol, and the reaction container is initially in a vacuum state; liquid sodium is not in direct contact with air when entering the sodium aerosol generator, the reaction process is controllable, the condition of uncontrollable autonomous combustion of sodium is avoided, and the whole process is safe and controllable.

Description

Technical Field

[0001] The invention belongs to the technical field of reactor devices, and in particular relates to a sodium aerosol fluidization generating device and method. Background Art

[0002] Sodium-cooled fast reactors use liquid sodium metal as a coolant. Sodium metal has active chemical properties. When high-temperature liquid sodium comes into contact with air, it will burn and generate a dense white smoke - sodium aerosol. Sodium aerosol is a particle with an average particle size of 2 to 20 μm, which is corrosive and highly adhesive. It is a characteristic product produced when sodium leaks and sodium fire conditions occur in sodium-cooled fast reactors. The detection of very early trace sodium aerosols in the air is of great significance for related accident monitoring and accident handling.

[0003] In the research of sodium aerosol detection technology, it is necessary to conduct detector response experiments in a real sodium aerosol environment. At present, the main ways to obtain sodium aerosol are sodium combustion and sodium-water reaction. Among them, sodium combustion is to ignite metallic sodium in an air atmosphere, which usually needs to be heated to above 200°C. The reaction of sodium in the air is difficult to control, and it is easy to form a layer of silver-white oxide film to interrupt the sodium combustion. In order to obtain a continuous combustion state, the burning sodium needs to be continuously stirred, which is difficult to operate, and the concentration and purity of the generated sodium aerosol are not high, mainly sodium oxide and sodium peroxide. Sodium reacts with water to produce sodium aerosol, but this method is extremely violent and prone to explosion, and there are great safety hazards. How to safely and stably obtain sodium aerosol has become a problem that currently plagues the industry. In addition, sodium aerosol is harmful to the human body, and the generation of sodium aerosol requires a closed generation device. Therefore, designing a stable sodium aerosol fluidization generation device is of great significance for the research of sodium aerosol detection technology. Summary of the invention

[0004] The object of the present invention is to provide a sodium aerosol fluidization generating device and method, which are used to solve the disadvantage of the existing sodium aerosol obtaining method that there is a great potential safety hazard in obtaining the sodium aerosol concentration.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] The invention discloses a sodium aerosol fluidization generating device, comprising a reaction container; one side wall of the reaction container is connected with a raw material conveying system and a temperature control system, and the other side wall is connected with an aerosol collecting system; a sodium aerosol generator is arranged inside the reaction container; the raw material conveying system and the temperature control system are respectively connected with the sodium aerosol generator for generating sodium aerosol; the sodium aerosol generator is connected with the aerosol collecting system for storing the generated sodium aerosol; and the temperature control system is used for monitoring and controlling the temperature of the sodium aerosol generator.

[0007] Furthermore, the raw material delivery system includes an oxidizing gas storage bottle, an inert gas bottle and a sodium injector; a gas inlet and a sodium inlet are provided on one side wall of the reaction container; the oxidizing gas storage bottle and the inert gas bottle respectively pass through the gas inlet through the gas pipeline and enter the sodium aerosol generator inside the reaction container;

[0008] The sodium injector passes through a sodium inlet through a sodium injection pipe and enters into a sodium aerosol generator inside the reaction container.

[0009] Furthermore, a flow meter pressure reducing valve is also provided on the gas pipeline.

[0010] Furthermore, the sodium aerosol generator comprises a sodium vapor generator, a sodium aerosol generator and a sodium vapor circulation pipe; the sodium vapor generator and the sodium aerosol generator are connected via the sodium vapor circulation pipe; the oxidizing gas storage bottle and the inert gas bottle respectively pass through a gas pipeline through a gas inlet and enter the sodium vapor generator to generate sodium vapor; the sodium aerosol generator is connected to an aerosol collection system.

[0011] Furthermore, the temperature control system includes a temperature controller, a sodium vapor generator heating plate, a sodium aerosol generator heating plate and a thermocouple; the sodium vapor generator heating plate and the sodium aerosol generator heating plate are respectively arranged at the bottom of the sodium vapor generator and the sodium aerosol generator; the sodium vapor generator heating plate and the sodium aerosol generator heating plate are respectively connected to a temperature controller arranged outside the reaction container; the thermocouple is connected to the temperature controller for monitoring the temperature in the sodium aerosol generator and the reaction container.

[0012] Furthermore, the aerosol collection system is an aerosol collector; the aerosol collector is arranged outside the other side wall of the reaction container and connected to the outlet of the sodium aerosol generator.

[0013] Furthermore, a quartz observation window is provided on the top of the reaction container.

[0014] The present invention also discloses a method for using the sodium aerosol fluidization generating device, comprising the following steps:

[0015] The raw material conveying system inputs an oxidant, an inert gas and liquid sodium for generating sodium aerosol into a sodium aerosol generator; in the sodium aerosol generator, the liquid sodium and the inert gas are mixed to generate sodium vapor, and the sodium vapor reacts with the oxidant to form sodium aerosol, and the subsequently generated sodium aerosol is stored through an aerosol collection system.

[0016] Furthermore, the oxidant for generating the sodium aerosol is oxygen.

[0017] Furthermore, the liquid sodium is produced by a sodium injector in a raw material delivery system.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The invention discloses a sodium aerosol fluidization generating device. By arranging a raw material conveying system, a temperature control system and a sodium aerosol generator, inert gas and liquid sodium in the raw material conveying system are directly placed in the sodium aerosol generator and taken out, and react with oxidizing gas in the raw material conveying system to generate sodium aerosol. The reaction container is initially in a vacuum state, and liquid sodium does not directly contact the air when entering the sodium aerosol generator for pilot testing. The reaction process is controllable, and uncontrollable autonomous combustion of sodium does not occur. The whole process is safe and controllable.

[0020] Furthermore, the temperature controller and thermocouple in the temperature control system timely monitor and control the temperature of the sodium aerosol generator to ensure the stable operation of the entire system.

[0021] Furthermore, a flow meter pressure reducing valve is provided to control the flow of the oxygen and the inert gas, thereby outputting safe and controllable oxygen and inert gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The figure is the overall structure diagram of the sodium aerosol fluidization generating device of the present invention;

[0023] Among them: 1-oxidizing gas storage bottle; 2-flow meter pressure reducing valve; 3-inert gas bottle; 4-sodium injector; 5-sodium injection tube; 6-temperature controller; 7-sodium inlet; 8-gas inlet; 9-sodium vapor generator heating plate; 10-sodium vapor; 11-sodium vapor generator; 12-thermocouple; 13-reaction container; 14-gas pipeline; 15-quartz observation window; 16-sodium vapor circulation tube; 17-aerosol collector; 18-liquid sodium; 19-sodium aerosol; 20-sodium aerosol generator heating plate; 21-sodium aerosol generator. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0027] The invention discloses a sodium aerosol fluidization generating device, comprising a reaction container 13, a raw material conveying system, a temperature control system and a sodium aerosol generator.

[0028] like Figure 1 As shown, the raw material conveying system includes an oxidizing gas storage bottle 1 for storing oxygen and outputting oxygen as an oxidant for generating a sodium aerosol 19; it also includes an inert gas bottle 3 for storing inert gas and outputting inert gas as a transmission medium; it also includes a sodium injector 4 for storing and heating sodium, and outputting liquid sodium 18 to the sodium aerosol generator through a sodium injection pipe 5 via a sodium introduction port 7; a gas introduction port 8 and a sodium introduction port 7 are provided on one side wall of the reaction container 13, and the oxidizing gas storage bottle 1 and the inert gas bottle 3 respectively pass through the gas introduction port 8 through a gas pipeline 14 to enter the sodium aerosol generator inside the reaction container 13.

[0029] The gas pipeline 14 is also provided with a flow meter pressure reducing valve 2 for controlling the flow of the oxygen and the inert gas and outputting safe and controllable oxygen and inert gas.

[0030] The sodium aerosol generator includes a sodium vapor generator 11, which is used to mix the liquid sodium 18 and the inert gas, the liquid sodium 18 is heated to form sodium vapor 10, and the inert gas does not react with the liquid sodium 18 to form a fluidized state to carry the sodium vapor 10 away from the liquid sodium 18; it also includes a sodium aerosol generator 21, which is used to input the sodium vapor 10 and oxygen, and react to generate sodium aerosol 19; it also includes a sodium vapor circulation pipe 16, which is used to connect the sodium vapor generator 11 and the sodium aerosol generator 21, and the sodium vapor 10 in the sodium vapor generator 11 enters the sodium aerosol generator 21 through the sodium vapor circulation pipe 16.

[0031] The aerosol collection system is an aerosol collector 17 , which is arranged outside the other side wall and connected to the outlet of the sodium aerosol generator 21 for collecting sodium aerosol 19 for analysis.

[0032] The temperature control system includes a temperature controller 6 for adjusting the temperature of a sodium vapor generator heating plate 9 and a sodium aerosol generator heating plate 20, and also includes a thermocouple 12 for real-time monitoring the temperature of the liquid sodium 18 in the sodium aerosol generator 21 and the temperature of the reaction container 13; the sodium vapor generator heating plate 9 and the sodium aerosol generator heating plate 20 are respectively arranged at the bottom of the sodium vapor generator 11 and the sodium aerosol generator 21.

[0033] The working principle of the sodium aerosol fluidization generating device of the present invention is as follows:

[0034] The sodium injector 4 heats the sodium by itself to form low-temperature liquid sodium, and outputs the liquid sodium to the sodium vapor generator 11 through the sodium injection pipe 5 and the sodium inlet 7. The temperature controller 6 adjusts the temperature of the sodium vapor reactor heating plate 9 to heat the sodium vapor generator 11 to obtain high-temperature liquid sodium 18. The inert gas enters the sodium vapor generator 11 through the gas pipeline 14 and the gas inlet 8 to convert the liquid sodium 18 into sodium vapor 10 at high temperature. The inert gas is stably taken out in a fluidized state and input into the sodium aerosol generator 21. The sodium vapor 10 reacts with the oxygen in the sodium aerosol generator 21 to form a sodium aerosol 19, which is collected by the aerosol collector 17.

[0035] The flow meter pressure reducing valve 2 can be adjusted to control the generation rate of the sodium aerosol 19 to ensure stable generation.

[0036] The system disclosed by the present invention directly introduces an inert gas into the interior of liquid sodium 18, and the inert gas brings out sodium vapor 10 and enters a sodium aerosol generator 21, oxygen reacts with the sodium vapor 10 to form a sodium aerosol 19, and the introduced inert gas brings out the sodium aerosol 19 in a fluidized state, and the reaction container 13 is initially in a vacuum state, and the sodium injector 4 directly introduces the liquid sodium 18 into the sodium vapor generator 11 so that the liquid sodium 18 does not directly contact the air, and the reaction process is relatively controllable, and the situation of uncontrollable autonomous combustion of sodium does not occur.

[0037] The above contents are only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A sodium aerosol fluidization generating device, characterized in that: The invention comprises a reaction container (13); one side wall of the reaction container (13) is connected to a raw material conveying system and a temperature control system, and the other side wall is connected to an aerosol collection system; a sodium aerosol generator is arranged inside the reaction container (13); the raw material conveying system and the temperature control system are respectively connected to the sodium aerosol generator for generating sodium aerosol (19); the sodium aerosol generator is connected to the aerosol collection system for storing the generated sodium aerosol (19); and the temperature control system is used to monitor and control the temperature of the sodium aerosol generator.

2. A sodium aerosol fluidization generating device according to claim 1, characterized in that: The raw material delivery system comprises an oxidizing gas storage bottle (1), an inert gas bottle (3) and a sodium injector (4); a gas inlet (8) and a sodium inlet (7) are provided on a side wall of the reaction container (13); the oxidizing gas storage bottle (1) and the inert gas bottle (3) respectively pass through the gas inlet (8) through a gas pipeline (14) and enter the sodium aerosol generator inside the reaction container (13); The sodium injector (4) enters the sodium aerosol generator inside the reaction container (13) through the sodium injection pipe (5) and the sodium introduction port (7).

3. A sodium aerosol fluidization generating device according to claim 2, characterized in that: The gas pipeline (14) is also provided with a flow meter pressure reducing valve (2).

4. A sodium aerosol fluidization generating device according to claim 2, characterized in that: The sodium aerosol generator comprises a sodium vapor generator (11), a sodium aerosol generator (21) and a sodium vapor circulation pipe (16); the sodium vapor generator (11) and the sodium aerosol generator (21) are connected via the sodium vapor circulation pipe (16); the oxidizing gas storage bottle (1) and the inert gas bottle (3) are respectively passed through a gas pipeline (14) and a gas inlet (8) into the sodium vapor generator (11) to generate sodium vapor (10); and the sodium aerosol generator (21) is connected to an aerosol collection system.

5. A sodium aerosol fluidization generating device according to claim 4, characterized in that: The temperature control system comprises a temperature controller (6), a sodium vapor generator heating plate (9), a sodium aerosol generator heating plate (20) and a thermocouple (12); the sodium vapor generator heating plate (9) and the sodium aerosol generator heating plate (20) are respectively arranged at the bottom of the sodium vapor generator (11) and the sodium aerosol generator (21); the sodium vapor generator heating plate (9) and the sodium aerosol generator heating plate (20) are respectively connected to a temperature controller (6) arranged outside a reaction container (13); the thermocouple (12) is connected to the temperature controller (6) and is used to monitor the temperature in the sodium aerosol generator (21) and the reaction container (13).

6. A sodium aerosol fluidization generating device according to claim 5, characterized in that: The aerosol collection system is an aerosol collector (17); the aerosol collector (17) is arranged outside the other side wall of the reaction container (13) and connected to the outlet of the sodium aerosol generator (21).

7. A sodium aerosol fluidization generating device according to claim 1, characterized in that: A quartz observation window (15) is provided on the top of the reaction container (13).

8. A method for using a sodium aerosol fluidization generating device according to any one of claims 1 to 7, characterized in that: The following steps are involved: The raw material conveying system inputs an oxidant, an inert gas and liquid sodium (18) for generating sodium aerosol into a sodium aerosol generator; in the sodium aerosol generator, the liquid sodium (18) and the inert gas are mixed to generate sodium vapor (10); the sodium vapor (10) reacts with the oxidant to form sodium aerosol (19); and the generated sodium aerosol (19) is stored through an aerosol collection system.

9. The method for using the sodium aerosol fluidization generating device according to claim 8, characterized in that: The oxidant for generating sodium aerosol is oxygen.

10. The method for using the sodium aerosol fluidization generating device according to claim 8, characterized in that: The liquid sodium (18) is produced by a sodium injector (4) in a raw material delivery system.

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