Dynamic separation test bed for radioactive mixed gas

Abstract

The invention belongs to the technical field of nuclear power, and particularly relates to a radioactive mixed gas dynamic separation test bed. According to the radioactive mixed gas dynamic separation test bed, various components in radioactive mixed gas can be efficiently separated, and particularly radioactive inert gas argon, krypton, xenon and the like can be separated. Compared with the prior art, the radioactive mixed gas dynamic separation test bed is simple in structure and convenient to operate; the device can adapt to radioactive mixed gases of different types and concentrations; the separation efficiency is high and the energy consumption is low; real-time monitoring is achieved, and the separation effect is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power, and in particular relates to a radioactive mixed gas dynamic separation test bench. Background Art

[0002] The development background of radioactive gas separation technology is closely related to the production and application of radioactive inert gases. Radioactive inert gases such as xenon ( 133 Xe), Krypton ( 85 Kr) and Argon ( 37 Ar) is an important gas fission product, mainly produced in nuclear power plant reactors, underground nuclear tests, spent fuel reprocessing and other human nuclear activities. Due to their radioactive properties, these gases have important application value in the fields of nuclear arms control verification, nuclear environmental monitoring, and nuclear fuel cycle.

[0003] With the development of the nuclear energy industry, the effective separation of radioactive gases has become an important research field. Although traditional separation technologies such as cryogenic distillation are mature, they have problems of high energy consumption and high cost. Therefore, researchers have been looking for more efficient and economical separation methods. In recent years, adsorption separation technology has attracted attention due to its simple operation and low cost. In particular, the use of solid porous adsorption materials to selectively and efficiently adsorb and separate the target radioactive inert gas from a complex ambient atmosphere at room temperature is currently the simplest and most efficient method.

[0004] New porous materials such as metal organic framework materials (MOF), porous organic framework materials (POF), and porous organic polymers have shown excellent performance and good application prospects in the separation of inert gases Xe and Kr. These materials have high porosity and adjustable pore size, which can achieve efficient and selective adsorption of specific gas molecules. In addition, with the advancement of technology, some other separation technologies are also being continuously developed and optimized, such as chromatography, membrane separation technology, chemical absorption, and laser isotope separation. The development of these technologies provides more options and possibilities for the separation of radioactive gases.

[0005] However, existing separation technologies are often inefficient, complex to operate, and difficult to adapt to different types and concentrations of radioactive gases. Therefore, there is a need to improve separation efficiency and operational convenience. Summary of the invention

[0006] In order to overcome the problems existing in the related art, a radioactive mixed gas dynamic separation test bench is provided, wherein the test bench comprises: an input module, a separation module, an output module, a monitoring module and a control module;

[0007] An input module, used for introducing radioactive mixed gas to be separated;

[0008] The separation module is connected to the input module, and the separation module includes a plurality of separation units, each separation unit includes at least one adsorption material, and the types of adsorption materials included in different separation units are different from each other, and the mixed gas is separated according to the difference in adsorption residence time of different radioactive gases;

[0009] An output module, used to collect the separated radioactive gases of different types, respectively. The output module comprises a plurality of gas outlets, each of which is correspondingly arranged at an output end of a type of separation unit, and different gas outlets output different radioactive gases;

[0010] The monitoring module includes multiple monitoring units, each of which is used to monitor the composition and separation effect of the corresponding type of gas upstream and downstream of the corresponding separation unit in real time;

[0011] The control module is respectively connected to the input module, separation module, output module and monitoring module, and is used to control the flow rate, pressure and temperature of the gas to optimize the separation efficiency and complete the separation of radioactive gas under different set conditions.

[0012] In one possible implementation, the input module includes a suction pump, a filter, a humidifier, a buffer chamber, a heater, and a valve control assembly;

[0013] The radioactive mixed gas is sucked in by the suction pump, filtered by the filter, and then input into the humidifier for humidification treatment. Then, it passes through the buffer chamber and is heated by the heater to form a mixed gas with a preset air flow rate, temperature, and pressure, thereby accurately controlling the gas temperature, flow rate, and pressure;

[0014] The control module can control the power of the suction pump and the heating temperature of the heater to control the temperature, flow rate and pressure of the radioactive mixed gas; in addition, the control module can control the on and off of each valve.

[0015] In a possible implementation, the input module further includes an inlet valve and a flow meter, and the control module can control the gas flow rate according to flow data collected by the flow meter.

[0016] In a possible implementation, in the separation module, each separation unit includes a plurality of separation columns filled with adsorption materials, and the adsorption materials include any one or more of activated carbon, membrane separation, and metal organic framework materials.

[0017] In a possible implementation, the separation module can increase or decrease the number and types of separation units.

[0018] In a possible implementation, each outlet of the output module is equipped with a compression pump to compress the outlet gas into a gas cylinder for storage.

[0019] In a possible implementation, the output module further includes a radioactive gas purification processing unit, which is disposed at the end of the airway of the test bench and is used for filtering and separating the residual gas discharged after the treatment.

[0020] In a possible implementation, the monitoring range of the monitoring unit includes monitoring of radioactive inert gas components such as argon, krypton, xenon, and radon.

[0021] In a possible implementation, the monitoring unit further includes a radioactivity monitoring function, which can monitor the radioactivity of the reaction gas in real time.

[0022] The beneficial effects of the present disclosure are: the radioactive mixed gas dynamic separation test bench provided by the present disclosure can efficiently separate various components in the radioactive mixed gas, especially for the separation of radioactive inert gases such as argon, krypton, and xenon. Compared with the prior art, the radioactive mixed gas dynamic separation test bench disclosed in the present disclosure has a simple structure and is easy to operate; it can adapt to radioactive mixed gases of different types and concentrations; it has high separation efficiency and low energy consumption; and it can monitor in real time to ensure the separation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of the use of a radioactive mixed gas dynamic separation test bench shown in an embodiment of the present disclosure.

[0024] Figure 2 It is a schematic diagram of an input module of a radioactive mixed gas dynamic separation test bench shown in an embodiment of the present disclosure.

[0025] Figure 3 It is a flow chart of the use of a radioactive mixed gas dynamic separation test bench shown in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] The present disclosure is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Unless otherwise defined, the technical and scientific terms used in the present disclosure have the same meanings as those generally understood by those skilled in the art to which the present disclosure belongs; the terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the term "including" and any variations thereof in the present disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in the present disclosure are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in the field without making creative efforts are within the scope of protection of the present disclosure.

[0028] Reference to "embodiments" in this disclosure means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the disclosure. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0029] Figure 1 is a flowchart of the use of a radioactive mixed gas dynamic separation test bench shown in an embodiment of the present disclosure, such as Figure 1 As shown, the test bench includes: an input module, a separation module, an output module, a monitoring module and a control module. The mixed radioactive gas is introduced into the separation module through the input module, separated by the adsorption material, and the different component gases are output through the output module to complete the separation. The control module is respectively connected to the input module, the separation module, the output module and the monitoring module, and is used to control the flow rate, pressure and temperature of the gas to optimize the separation efficiency and complete the radioactive gas separation under different set conditions.

[0030] An input module, used for introducing the radioactive mixed gas to be separated, the input module comprising a suction pump, a filter, a humidifier, a buffer chamber, a heater and a valve control assembly;

[0031] like Figure 2 As shown, the input module has the functions of controlling the airflow velocity, temperature and pressure. The radioactive mixed gas is sucked in by the suction pump, filtered by the filter to remove impurities such as aerosols, and then input into the humidifier for humidification treatment. Then, it passes through the buffer chamber and is heated by the heater to form a mixed gas with a preset airflow velocity, temperature and pressure. The control module can control the power of the suction pump and the heating temperature of the heater, and can control the on and off of each valve, thereby accurately controlling the gas temperature, flow and pressure.

[0032] In a possible implementation, the input module further includes an inlet valve and a flow meter for precisely controlling the inflow of gas.

[0033] The separation module is connected to the input module and is used for dynamically adsorbing and separating different types of radioactive gases. The separation module includes multiple separation units. Each separation unit includes at least one adsorption material. The types of adsorption materials contained in different separation units are different. The mixed gas is separated according to the difference in adsorption residence time of different radioactive gases.

[0034] In one possible implementation, Figure 3As shown, in the separation module, each separation unit includes a plurality of separation columns filled with adsorption materials, and the adsorption materials include any one or more of activated carbon, membrane separation, and metal organic framework materials (MOF). The adsorption materials may also include other high-efficiency adsorbents. The present disclosure does not limit the type of adsorption materials.

[0035] In a possible implementation, the separation module can increase or decrease the number and type of separation units according to the actual conditions of the gas to be processed so as to flexibly meet different separation requirements and improve work efficiency.

[0036] The output module is used to collect the separated radioactive gases of different types. The output module includes multiple gas outlets, each of which is correspondingly arranged at the output end of a type of separation unit. Different gas outlets output different radioactive gases. In addition, each outlet is equipped with a compression pump to compress the outlet gas into a gas cylinder for storage. The output module also includes a radioactive gas purification unit, which is arranged at the end of the test bench airway to filter the residual gas discharged after separation and treatment, as a safety protection measure.

[0037] The monitoring module includes a variety of monitoring units, each of which is used to monitor the composition and separation effect of the corresponding type of gas upstream and downstream of the corresponding separation unit in real time.

[0038] The monitoring unit's monitoring scope includes monitoring of radioactive inert gases such as argon, krypton, xenon and radon. In addition, the monitoring unit also includes a radioactivity monitoring function that can monitor the radioactivity of the reaction gas in real time.

[0039] The control module is connected to the input module, classification module and output module respectively, and is used to control the flow rate, pressure and temperature of the gas to optimize the separation efficiency and complete the separation of radioactive gases under different set conditions. It can also continuously separate the mixed radioactive gases.

[0040] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A radioactive mixed gas dynamic separation test bench, characterized in that: The test bench comprises: an input module, a separation module, an output module, a monitoring module and a control module; An input module, used for introducing radioactive mixed gas to be separated; The separation module is connected to the input module, and the separation module includes a plurality of separation units, each separation unit includes at least one adsorption material, and the types of adsorption materials included in different separation units are different from each other, and the mixed gas is separated according to the difference in adsorption residence time of different radioactive gases; An output module, used to collect the separated radioactive gases of different types, respectively. The output module comprises a plurality of gas outlets, each of which is correspondingly arranged at an output end of a type of separation unit, and different gas outlets output different radioactive gases; The monitoring module includes multiple monitoring units, each of which is used to monitor the composition and separation effect of the corresponding type of gas upstream and downstream of the corresponding separation unit in real time; The control module is respectively connected to the input module, separation module, output module and monitoring module, and is used to control the flow rate, pressure and temperature of the gas to optimize the separation efficiency and complete the separation of radioactive gas under different set conditions.

2. The radioactive mixed gas dynamic separation test bench according to claim 1, characterized in that: The input module includes a suction pump, a filter, a humidifier, a buffer chamber, a heater, and a valve control assembly; The radioactive mixed gas is sucked in by the suction pump, filtered by the filter, and then input into the humidifier for humidification treatment. Then, it passes through the buffer chamber and is heated by the heater to form a mixed gas with a preset air flow rate, temperature, and pressure, thereby accurately controlling the gas temperature, flow rate, and pressure; The control module can control the power of the suction pump and the heating temperature of the heater to control the temperature, flow rate and pressure of the radioactive mixed gas; in addition, the control module can control the on and off of each valve.

3. The radioactive mixed gas dynamic separation test bench according to claim 2 is characterized in that: The input module also includes an inlet valve and a flow meter, and the control module can control the gas flow according to the flow data collected by the flow meter.

4. The radioactive mixed gas dynamic separation test bench according to claim 1, characterized in that: In the separation module, each separation unit comprises a plurality of separation columns filled with adsorption materials, and the adsorption materials comprise any one or more of activated carbon, membrane separation, and metal organic framework materials.

5. The radioactive mixed gas dynamic separation test bench according to claim 4, characterized in that: The separation module can increase or decrease the number and types of separation units.

6. The radioactive mixed gas dynamic separation test bench according to claim 1, characterized in that: Each outlet of the output module is equipped with a compression pump to compress the outlet gas into a gas cylinder for storage.

7. The radioactive mixed gas dynamic separation test bench according to claim 1, characterized in that: The output module also includes a radioactive gas purification processing unit, which is arranged at the end of the test bench airway and is used for filtering and separating the residual gas discharged after the treatment.

8. The radioactive mixed gas dynamic separation test bench according to claim 1, characterized in that: The monitoring scope of the monitoring unit includes the monitoring of radioactive inert gas components such as argon, krypton, xenon and radon.

9. The radioactive mixed gas dynamic separation test bench according to claim 1, characterized in that: The monitoring unit also includes a radioactivity monitoring function, which can monitor the radioactivity of the reaction gas in real time.

Images