Water circulation structure for cooling neutron source target body

Abstract

The utility model relates to the technical field of circulation cooling, in particular to a water circulation structure for cooling a neutron source target body, the water circulation structure comprises a circulation loop and a purification loop, and the purification loop is arranged on a circulation path of the circulation loop; the circulation loop sequentially comprises a water tank, a shield pump, a first sensing group and a simulation loop along the circulation direction of water, and the simulation loop is connected in parallel between connecting passages of the circulation loop; the purification loop comprises a first purification set, a second purification set and an isolation valve set, the first purification set and the second purification set are connected in series, and the isolation valve set is arranged between the communicating joints of the first purification set and the second purification set in a penetrating mode; the neutron source target body can be effectively and efficiently cooled, and leakage of radioactive elements can be effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of circulating cooling, and in particular to a water circulating structure for cooling a neutron source target. Background Art

[0002] The spallation neutron source is a large-scale device, mainly composed of three parts: accelerator, target station and neutron spectrometer. The target station water cooling system is an important part of the target station, including a heavy water cooling system and two light water cooling systems, both of which are radioactive water cooling systems. The main function of the heavy water cooling system is to provide continuous cooling water to the target station. As heavy water flows through the high-dose irradiation environment area, spallation reactions will occur after neutrons and protons bombard the coolant to produce radioactive nuclides, which increases the radioactivity level of the entire cooling water system, deteriorates the water quality, and affects the operation of the entire system. In order to ensure the normal operation of the spallation neutron source, the neutron source target must be effectively and timely cooled, and the cooling water must not leak. Summary of the invention

[0003] The object of the present invention is to provide a water circulation structure for cooling a neutron source target, so as to cool the spallation neutron source effectively and safely.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a water circulation structure for cooling a neutron source target, the water circulation structure comprising a circulation loop and a purification loop, the purification water path being arranged on the circulation path of the circulation loop; the circulation loop comprising a water tank, a shielded pump, a first sensor group and a simulation loop in sequence along the circulation direction of water, the simulation loop being connected in parallel between the connecting paths of the circulation loop; the purification loop comprising a first purification group, a second purification group and an isolation valve group, the first purification group and the second purification group being connected in series with each other, the isolation valve group being interspersed between the conducting connection of the first purification group and the second purification group.

[0005] The simulation loop includes a simulation target and a second sensor group, wherein the second sensor group is distributed between an input end and an output end of the simulation target.

[0006] The first purification group includes a first filter, a first ion exchanger and a third sensor group, wherein the first filter is connected in series with the first ion exchanger.

[0007] The second purification group includes a second filter, a second ion exchanger and a fourth sensor group, wherein the second filter is connected in series with the second ion exchanger.

[0008] A first valve is provided between the connection passage between the water tank and the shielded pump, a second valve is provided at the water inlet end of the water tank, and a first isolation valve is provided at the discharge end of the simulation target.

[0009] A third valve is provided between the first filter and the drainage end of the circulating water circuit.

[0010] A fourth valve is arranged between the second filter and the water tank.

[0011] A first filter valve is disposed at the drainage end of the first filter, and a first ion exchange valve is disposed at the drainage end of the first ion exchanger.

[0012] A second filter valve is provided at the drainage end of the second filter.

[0013] A second ion exchange valve is provided at the drainage end of the second ion exchanger.

[0014] Technical effects and advantages of the present invention:

[0015] The water circulation structure for cooling the neutron source target of the present invention includes a circulation loop and a purification loop, which can not only effectively and efficiently cool the neutron source target, but also effectively avoid leakage of radioactive elements. More specifically, the present invention performs effective and efficient circulation cooling through the circulation loop, and the purification loop can filter and absorb most of the radioactive elements, which can not only achieve efficient cooling, but also reduce the risk of the entire set of equipment in operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 For the present invention Figure 1 Schematic diagram of the structural connections in area A.

[0018] Figure 3 It is an operation flow chart of the simulation method of the present invention.

[0019] In the figure: 1, water tank; 2, shielded pump; 3, first sensor group; 4, simulated target; 5, second sensor group; 6, first filter; 7, first ion exchanger; 8, third sensor group; 9, second filter; 10, second ion exchanger; 11, fourth sensor group; 12, first valve; 13, second valve; 14, first isolation valve; 15, isolation valve group; 16, third valve; 17, fourth valve; 18, first filter valve; 19, first ion exchange valve; 20, second filter valve; 21, second ion exchange valve; 22, first supplementary valve; 23, second supplementary valve; 24, first sampling valve; 25, second sampling valve; 26, first drainage valve; 27, second drainage valve; 28, nitrogen bottle; 29, nitrogen valve; 30, nitrogen loop sensor; 31, fifth valve; 32, sixth valve; 33, seventh valve; 34, eighth valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention.

[0021] The present invention provides Figure 1-2 The water circulation structure for cooling the neutron source target shown includes a circulation loop and a purification loop, and the purification water loop is arranged on the circulation path of the circulation loop;

[0022] The circulation loop includes a water tank 1, a shielded pump 2, a first sensor group 3 and a simulation loop in sequence along the circulation direction of water, and the simulation loop is connected in parallel between the connection paths of the circulation loop;

[0023] Specifically, a first valve 12 is provided between the connection passage between the water tank 1 and the shielded pump 2 , a second valve 13 is provided at the water inlet end of the water tank 1 , and a first isolation valve 14 is provided at the discharge end of the simulation target 4 .

[0024] The simulation circuit includes a simulation target 4 and a second sensor group 5, and the second sensor group 5 is distributed between the input end and the output end of the simulation target 4;

[0025] It should be noted that the cooling water test system of this scheme is provided with a flange bolt connection, the water inlet of the shielded pump 2 is connected to the first valve 12 through the flange bolt connection structure, and the water outlet of the shielded pump 2 is connected to the simulation circuit through the flange bolt connection structure; the flange bolt connection is a raised face structure, and the flange bolt connection includes a pair of raised face flanges, gaskets and bolt groups.

[0026] The purification circuit includes a first purification group, a second purification group and an isolation valve group 15. The first purification group and the second purification group are connected in series, and the isolation valve group 15 is interspersed between the conductive connection of the first purification group and the second purification group.

[0027] The first purification group includes a first filter 6, a first ion exchanger 7 and a third sensor group 8, and the first filter 6 and the first ion exchanger 7 are connected in series;

[0028] It should be noted that a filter generally refers to a device or apparatus used to separate solid particles or impurities from liquids. They can use different working principles and materials and are used for filtering and separation operations in multiple fields. Common types of filters include: Mechanical filters: usually intercept solid particles through physical isolation, such as screens, filter papers and filter cloths. Oil filter: used to remove impurities in engine oil and keep the oil clean to extend engine life. Air filter: used in air conditioners, ventilation systems and car engines to remove particles and pollutants from the air. Water filter: used to purify drinking water, industrial water or swimming pool water, usually using technologies such as activated carbon, ceramics or reverse osmosis. Flue gas filter: used to remove solid and liquid particles produced during the combustion process. Biofilter: used to remove microorganisms and organic pollutants from the air or liquid. Since the filter in this solution is used in water circulation, the type used is a mechanical filter or a water filter.

[0029] An ion exchanger is a device used to remove ionic impurities from water and is commonly used in water and wastewater treatment processes. They usually contain resins or other materials that selectively adsorb and release ions. When water passes through an ion exchanger, the cations and anions in it exchange places with other ions on the resin, so that the ion concentration in the water is adjusted.

[0030] The second purification group includes a second filter 9 , a second ion exchanger 10 and a fourth sensor group 11 , and the second filter 9 and the second ion exchanger 10 are connected in series.

[0031] Specifically, a third valve 16 is provided between the first filter 6 and the drainage end of the circulating water circuit, a fourth valve 17 is provided between the second filter 9 and the water tank 1, a first filter valve 18 is provided at the drainage end of the first filter 6, a first ion exchange valve 19 is provided at the drainage end of the first ion exchanger 7, a second filter valve 20 is provided at the drainage end of the second filter 9, and a second ion exchange valve 21 is provided at the drainage end of the second ion exchanger 10.

[0032] Specifically, it also includes a first resin replenishing port and a second resin replenishing port; the first resin replenishing port is connected to the outlet end of the first ion exchanger 7, and the first resin replenishing port is provided with a first replenishing valve 22, the second resin replenishing port is connected to the outlet end of the second ion exchanger 10, and the second resin replenishing port is provided with a second replenishing valve 23.

[0033] It should be noted that the resin replenishment port is an inlet for adding fresh resin to the ion exchanger. Through the replenishment port, new resin can be gradually added to the exchanger to replace the saturated resin. This ensures the continuous operation and stability of the ion exchanger. In ion exchangers, resin replenishment usually needs to be carried out regularly, and the specific frequency depends on the type of resin, its purpose and operating conditions. The ion exchanger needs a resin replenishment port because during the ion exchange process, ions in the water will gradually adsorb onto the resin, and the original ions on the resin will be released into the water. Over time, the resin gradually becomes saturated and can no longer continue to adsorb more ions. At this time, the resin needs to be replenished or regenerated.

[0034] Specifically, it also includes a first sampling point and a second sampling point. The first sampling point is connected to the inlet of the first purification group and is provided with a first sampling valve 24. The second sampling point is connected to the outlet of the second purification group and the fourth sampling point is provided with a second sampling valve 25.

[0035] Specifically, it also includes a first drain outlet and a second drain outlet, the first drain outlet is arranged in a circulation loop, the first drain outlet is provided with a first drain valve 26, the second drain outlet is arranged in a purification loop, the second drain outlet is provided with a second drain valve 27, a fifth valve 31 is connected in series between the discharge end of the first filter 6 and the second drain outlet, a sixth valve 32 is connected in series between the discharge end of the first ion exchanger 7 and the second drain outlet, a seventh valve 33 is connected in series between the discharge end of the second filter 9 and the second drain outlet, and an eighth valve 34 is connected in series between the discharge end of the second ion exchanger 10 and the second drain outlet.

[0036] Specifically, it also includes a nitrogen circuit, which includes a nitrogen bottle 28. The nitrogen bottle 28 is arranged at the air inlet end of the water tank 1. A nitrogen valve 29 and a nitrogen circuit sensor 30 are sequentially arranged between the nitrogen bottle 28 and the connecting passage of the water tank 1.

[0037] Furthermore, the first sensor group 3 includes a pressure sensor, a temperature sensor and a flow rate sensor, the second sensor group 5 includes multiple pressure sensors, multiple temperature sensors and multiple flow rate sensors, the third sensor group 8 includes multiple pressure sensors, multiple temperature sensors and multiple flow rate sensors, and the fourth sensor group 11 includes multiple pressure sensors, multiple temperature sensors and multiple flow rate sensors.

[0038] It should be noted that pressure sensors are used to measure the pressure of gas or liquid. They can convert pressure into electrical signals to reflect the pressure of the measured object.

[0039] Temperature sensors are used to measure the temperature of an environment, object or fluid. They can measure temperature through a variety of working principles (such as thermocouples, thermistors, infrared, etc.) and convert temperature into electrical signal output. Temperature sensors are important in many applications, such as thermal management, weather observation, temperature control, etc.

[0040] Flow rate sensors are used to measure the flow rate or volume flow of fluids. They can achieve flow rate measurement through physical measurement principles (such as turbine, ultrasound, thermal expansion, etc.) and convert the results into corresponding electrical signals.

[0041] The present invention provides Figure 3 The digital twin simulation method of the neutron source target cooling water test system shown in the figure includes the following steps:

[0042] The first step is to acquire data, measure the three-dimensional structure of the neutron source target cooling water test system, and acquire the structural data of the system; collect the system operation parameters by pre-recording the operation data of the neutron source target cooling water test system; the operation parameters at least include the flow rate of the circulation loop, the pressure of the circulation loop, the flow rate of the circulation loop, the flow rate of the purification loop, the pressure of the purification loop, and the flow rate of the purification loop;

[0043] The second step is to establish a model. Using the system structure data obtained in the first step, a three-dimensional model of the neutron source target cooling water test system is established. Using the system operating parameters and system structure data obtained in the first step, a simulation model of the neutron source target cooling water test system is established. The three-dimensional model is established based on three-dimensional software such as CAD, and the simulation model is established based on hydraulic system simulation software.

[0044] Specifically, in the second step of establishing the simulation model, the three-dimensional model preprocessing is simplified in series and parallel, and the data processing method for the operating parameters is to take the average.

[0045] The third step is to perform simulation processing. Based on the three-dimensional model and simulation model established in the second step, the simulation running time and simulation model are set in the computer simulation software. The simulation model uses the simplest model of the computer simulation software.

[0046] It should be noted that the computer simulation software for model simulation includes:

[0047] MATLAB / Simulink: MATLAB is a powerful mathematical computing software, and Simulink is its accompanying modeling and simulation tool, which is widely used in control systems, signal processing, communications and other fields.

[0048] Ansys: Ansys provides an engineering simulation software package that covers multiple fields such as structural analysis, fluid mechanics, and electromagnetic fields, and is suitable for engineering design and analysis.

[0049] COMSOL Multiphysics: COMSOL is a software platform for multi-physics simulation that supports modeling and simulation in multiple fields, including electromagnetic fields, heat conduction, fluid mechanics, etc.

[0050] SolidWorks: SolidWorks is a 3D computer-aided design (CAD) software that also provides simulation capabilities and can be used for structural, fluid, and thermal analysis.

[0051] SimScale: SimScale is a cloud-based engineering simulation platform that provides services such as finite element analysis, fluid dynamics, and thermal simulation.

[0052] OpenFOAM: OpenFOAM is an open source computational fluid dynamics (CFD) software package suitable for simulation calculations of fluid flow and heat transfer.

[0053] Dymola: Dymola is a model-based, multi-domain simulation software for system-level modeling and simulation in areas such as control systems, vehicle dynamics, etc.

[0054] The computer software used in the present invention is Ansys or COMSOL.

[0055] The fourth step is to conduct simulation verification. By running the simulation in the third step to obtain the simulation result data, the data is compared with the operating parameters collected in the first step to obtain the digital twin simulation data of the neutron source target cooling water test system.

[0056] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water circulation structure for cooling a neutron source target, characterized in that: The water circulation structure comprises a circulation loop and a purification loop, wherein the purification loop is arranged on the circulation path of the circulation loop; the circulation loop comprises a water tank (1), a shielded pump (2), a first sensor group (3) and a simulation loop in sequence along the circulation direction of water, wherein the simulation loop is connected in parallel between the connection paths of the circulation loop; the purification loop comprises a first purification group, a second purification group and an isolation valve group (15), wherein the first purification group and the second purification group are connected in series, and the isolation valve group (15) is interspersed between the conductive connection of the first purification group and the second purification group.

2. A water circulation structure for cooling a neutron source target according to claim 1, characterized in that: The simulation loop comprises a simulation target (4) and a second sensor group (5), wherein the second sensor group (5) is distributed between an input end and an output end of the simulation target (4).

3. The water circulation structure for cooling a neutron source target according to claim 1, characterized in that: The first purification group comprises a first filter (6), a first ion exchanger (7) and a third sensor group (8), wherein the first filter (6) and the first ion exchanger (7) are connected in series.

4. The water circulation structure for cooling a neutron source target according to claim 1, characterized in that: The second purification group comprises a second filter (9), a second ion exchanger (10) and a fourth sensor group (11), wherein the second filter (9) and the second ion exchanger (10) are connected in series.

5. The water circulation structure for cooling a neutron source target according to claim 1, characterized in that: A first valve (12) is provided between the connection passage between the water tank (1) and the shielded pump (2), a second valve (13) is provided at the water inlet end of the water tank (1), and a first isolation valve (14) is provided at the discharge end of the simulation target (4).

6. The water circulation structure for cooling a neutron source target according to claim 3, characterized in that: A third valve (16) is provided between the first filter (6) and the drainage end of the circulating water circuit.

7. The water circulation structure for cooling a neutron source target according to claim 4, characterized in that: A fourth valve (17) is provided between the second filter (9) and the water tank (1).

8. The water circulation structure for cooling a neutron source target according to claim 3, characterized in that: A first filter valve (18) is provided at the drainage end of the first filter (6), and a first ion exchange valve (19) is provided at the drainage end of the first ion exchanger (7).

9. The water circulation structure for cooling a neutron source target according to claim 4, characterized in that: A second filter valve (20) is provided at the drainage end of the second filter (9).

10. The water circulation structure for cooling a neutron source target according to claim 4, characterized in that: A second ion exchange valve (21) is provided at the drainage end of the second ion exchanger (10).

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