Source water deoxidizing system and deoxidizing method

Abstract

The embodiment of the invention discloses a source water deoxygenization system and deoxygenization method.The source water deoxygenization system comprises a water supplementing tank, a source water deoxygenization unit, a water quality detection unit, a nitrogen supplementing unit and a heating unit, and on the basis, in the application process of the source water deoxygenization system, the water supplementing tank can be filled with deoxygenized water; water in the water supplementing tank can be output to other operation sections, and in the deoxidizing process, external water is deoxidized through the source water deoxidizing unit and then stored in the water supplementing tank; in the follow-up using process, liquid stored in the water supplementing tank can be detected by starting the water quality detection unit, when water in the water supplementing tank does not meet the requirement for the oxygen content, the heating unit can be started, and the water stored in the water supplementing unit can be heated through the heating unit, so that the oxygen solubility is reduced, and the oxygen content is reduced. And further, oxygen can be removed.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of nuclear power technology, and in particular to a source water deoxygenation system and a deoxygenation method. Background Art

[0002] The high temperature and high pressure test loop simulates the state of the normal operation of the primary loop of a pressurized water reactor by providing a high temperature and high pressure nuclear test environment to complete the irradiation test of fuel elements and materials. Considering the stability of the reactor structural materials, controlling the oxygen concentration of the primary water within the required range can avoid the formation of oxidation conditions and the increase of corrosion products caused by the reduction of hydrogen concentration. In addition, oxygen must also be controlled within an appropriate range in the auxiliary system. One of the important sources of oxygen in primary water is the dissolved oxygen dissolved in the preparation and storage of make-up water due to incomplete deoxygenation and contact between water and air. Different reactor facilities have different operating conditions, and the water quality control methods and requirements are different. For a specific test loop, how to effectively control the oxygen concentration of the water quality within the specified range and effectively remove impurity ions in the source water quality are of great significance to ensure the safe and stable operation of the reactor loop.

[0003] The test loop source water deoxygenation method is generally completed through deoxygenation resin. When the source water passes through the redox resin layer, the oxygen in the water reacts chemically with the active hydrogen on the resin to generate water and release nitrogen, which removes the dissolved oxygen in the water. The redox deoxygenation technology is simple to operate and can effectively deoxygenate the source water at room temperature without consuming power or releasing pressure. It saves energy and transportation power, so it has been widely used in the preparation of feed water for the first loop of the reactor.

[0004] In the previous design of the deoxygenation system for the irradiation test loop, the source water was directly injected into the water supply tank for storage after being deoxygenated by the deoxygenation resin. However, due to the high unit cost of nuclear-grade deoxygenation resin and the limited resin loading, the deoxygenation reaction of the source water is insufficient, and the deoxygenation effect is often poor. In addition, the deoxygenated water is stored in the water supply tank at room temperature, which has the problems of high oxygen solubility and direct contact between the deoxygenated water and the air, resulting in deterioration of water quality during the storage process after deoxygenation. In addition, due to the lack of real-time tracking of changes in water quality parameters, timely feedback cannot be obtained when water quality is abnormal. Therefore, it is necessary to design a new deoxygenation system to solve the above problems. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] To this end, a first aspect of the present invention provides a source water deoxygenation system.

[0007] A second aspect of the present invention provides a method for deoxygenation.

[0008] In view of this, according to a first aspect of an embodiment of the present application, a source water deoxygenation system is proposed, comprising:

[0009] Water supply tank;

[0010] A source water deoxygenation unit, one end of which is connected to an external water source, and the other end of which is connected to the water supply tank;

[0011] A water quality detection unit, the water quality detection unit comprising a detection component and a buffer water tank, one end of the water quality detection unit is connected to the water supply tank, and the other end is connected to the buffer water tank, and the buffer water tank is connected to the water supply tank;

[0012] A nitrogen replenishing unit, wherein the nitrogen replenishing unit is connected to the water replenishing tank;

[0013] A heating unit is used to provide thermal energy for the water replenishment tank.

[0014] In a feasible implementation, the source water deoxygenation unit comprises:

[0015] A deoxygenating centrifugal pump, a deoxygenating column, an ion column and a resin filter are arranged in series.

[0016] In a feasible implementation, the source water deoxygenation unit comprises:

[0017] a first bypass pipeline, wherein the first bypass pipeline is connected to the output end of the deaeration centrifugal pump, and the deaeration centrifugal pump, the deaeration column, the ion column and the resin filter are connected to the first bypass pipeline;

[0018] a source water control valve, the source water control valve being arranged on a pipeline connected in series with a deoxygenation centrifugal pump, a deoxygenation column, an ion column and a resin filter and on a first bypass pipeline, so that the deoxygenation column, the ion column and the resin filter can be connected in parallel with the deoxygenation centrifugal pump;

[0019] A flow meter is connected to the output end of the deaeration centrifugal pump.

[0020] In a feasible embodiment, the detection component includes: a conductivity meter, a dissolved oxygen meter and a pH meter connected in parallel, and the conductivity meter, the dissolved oxygen meter and the pH meter are connected to the water replenishment tank and the cache water tank.

[0021] In a feasible implementation manner, the water quality detection unit further includes:

[0022] a condenser, the condenser being in communication with the condenser and connected to the water supply tank;

[0023] A water pump is disposed between the cache water tank and the water replenishment tank, connecting the cache water tank and the water replenishment tank.

[0024] A drug adding port, the drug adding port is connected to the buffer water tank;

[0025] A second bypass pipeline, wherein the second bypass pipeline is connected to the conductivity meter, the dissolved oxygen meter and the pH meter

[0026] a water quality control valve, the water quality control valve being arranged on a pipeline in which the conductivity meter, the dissolved oxygen meter and the pH meter are connected in series and / or on the second bypass pipeline, so that the conductivity meter, the dissolved oxygen meter and the pH meter can be connected in parallel;

[0027] A filter, wherein the filter is arranged at the inlet end of the detection component;

[0028] A circulation pump is connected to the water supply tank and the filter.

[0029] In a feasible implementation manner, the nitrogen replenishment unit comprises:

[0030] Nitrogen;

[0031] A nitrogen supply pipeline, the nitrogen supply pipeline is connected to the nitrogen source and the water supply tank;

[0032] A nitrogen control valve is provided in the nitrogen supply pipeline to control the supply and pressure relief of nitrogen.

[0033] In a feasible implementation manner, the heating unit includes:

[0034] A plurality of groups of armored electric heating wires, wherein the armored electric heating wires are wound around the water supply tank;

[0035] A thermal insulation layer is covered on the armored electric heating wire.

[0036] In a feasible implementation manner, the water replenishment tank includes:

[0037] Tank;

[0038] A stirrer is arranged in the tank body.

[0039] In a feasible embodiment, the source water deoxygenation system further comprises:

[0040] A circulating deoxygenation pipeline, one end of which is connected to the water replenishment tank, and the other end of which is connected to the source water deoxygenation unit.

[0041] According to a second aspect of an embodiment of the present application, a deoxygenation method is proposed, which is applied to the source water deoxygenation system as described in any of the above technical solutions. The deoxygenation method includes:

[0042] In response to the source water deoxygenation instruction, the source water deoxygenation unit is turned on to allow the source water to enter the water supply tank through the source water deoxygenation unit;

[0043] Open the circulation pipeline of the source water deoxygenation system to carry out circulation deoxygenation;

[0044] In response to a heating instruction, controlling the heating unit to be turned on intermittently so that the water temperature in the water replenishment tank is maintained at a first threshold value;

[0045] In response to the nitrogen charging instruction, the nitrogen replenishing unit is turned on to replenish nitrogen into the water replenishing tank;

[0046] In response to a water quality detection instruction, the water quality detection unit is turned on to obtain a water quality detection result;

[0047] Based on the water quality detection result, the opening method of the circulation pipeline and the source water deoxygenation unit is determined.

[0048] Compared with the prior art, the present invention has at least the following beneficial effects:

[0049] The source water deoxygenation system provided in the embodiment of the present application includes a water supply tank, a source water deoxygenation unit, a water quality detection unit, a nitrogen supply unit and a heating unit. Based on this, during the application of the source water deoxygenation system, the deoxygenated water can be filled in the water supply tank, and the water in the water supply tank can be output to other operation sections. During the deoxygenation process, the external water is deoxygenated by the source water deoxygenation unit and then stored in the water supply tank; in the subsequent use process, the liquid stored in the water supply tank can be detected by turning on the water quality detection unit. When the water in the water supply tank does not meet the oxygen content requirement, the heating unit can be turned on. Through the heating unit, the heating unit can heat the water stored in the water supply unit, thereby reducing the oxygen solubility, and then deoxygenation can be achieved. In addition, the nitrogen supply unit can be turned on to supply nitrogen to the water supply tank to avoid contact between oxygen in the air and the deoxygenated water in the water supply tank, effectively avoiding the influence of dissolved oxygen on water quality. Based on this, the source water deoxygenation system provided by the embodiment of the present application can reduce the probability of deoxygenated water being integrated with oxygen, thereby ensuring the quality of the deoxygenated water. At the same time, the deoxygenated water can be tested, and when the water quality is abnormal, the operating personnel can provide timely feedback. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0051] Figure 1 A schematic structural diagram of a source water deoxygenation system according to an embodiment of the present application;

[0052] Figure 2 A schematic flow chart of the steps of a deoxygenation method provided in one embodiment of the present application.

[0053] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0054] 110 water replenishment tank, 120 source water deoxygenation unit, 130 water quality detection unit, 140 nitrogen replenishment unit, 150 circulating deoxygenation pipeline, 160 heating unit;

[0055] 111 tank body, 112 agitator;

[0056] 121 deaeration centrifugal pump, 122 deaeration column, 123 ion column, 124 resin filter, 125 flow meter;

[0057] 131 detection component, 132 buffer water tank, 133 condenser, 134 water pump, 135 dosing port, 136 filter, 137 circulation pump; 1311 conductivity meter, 1312 dissolved oxygen meter, 1313 pH meter;

[0058] 141 nitrogen source, 142 nitrogen supply pipeline. DETAILED DESCRIPTION

[0059] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0060] like Figure 1As shown, according to the first aspect of an embodiment of the present application, a source water deoxygenation system is proposed, including: a water replenishment tank 110; a source water deoxygenation unit 120, one end of the source water deoxygenation unit 120 is connected to an external water source, and the other end is connected to the water replenishment tank 110; a water quality detection unit 130, the water quality detection unit 130 includes a detection component 131 and a cache water tank 132, one end of the water quality detection unit 130 is connected to the water replenishment tank 110, and the other end is connected to the cache water tank 132, and the cache water tank 132 is connected to the water replenishment tank 110; a nitrogen replenishment unit 140, the nitrogen replenishment unit 140 is connected to the water replenishment tank 110; a heating unit 160, the heating unit 160 is used to provide heat energy for the water replenishment tank 110.

[0061] The source water deoxygenation system provided in the embodiment of the present application includes a water replenishment tank 110, a source water deoxygenation unit 120, a water quality detection unit 130, a nitrogen replenishment unit 140 and a heating unit 160. Based on this, during the application of the source water deoxygenation system, the deoxygenated water can be filled in the water replenishment tank 110, and the water in the water replenishment tank 110 can be output to other operation sections. During the deoxygenation process, the external water is deoxygenated by the source water deoxygenation unit 120 and then stored in the water replenishment tank 110; in subsequent use, the liquid stored in the water replenishment tank 110 can be detected by turning on the water quality detection unit 130. When the water in the water replenishment tank 110 does not meet the oxygen content requirement, the heating unit 160 can be turned on. Through the heating unit 160, the heating unit 160 can heat the water stored in the water replenishment unit, thereby reducing the oxygen solubility, thereby deoxygenating. In addition, the nitrogen replenishment unit 140 can be turned on to replenish nitrogen into the water replenishment tank 110 to prevent oxygen in the air from contacting the deoxygenated water in the water replenishment tank 110, effectively avoiding the influence of dissolved oxygen on water quality. Based on this, the source water deoxygenation system provided by the embodiment of the present application can reduce the probability of deoxygenated water being fused with oxygen, ensure the quality of deoxygenated water, and at the same time be able to detect the deoxygenated water. When the water quality is abnormal, the operator can provide timely feedback.

[0062] It can be understood that the water quality detection unit 130 of the source water deoxygenation system provided in the embodiment of the present application includes a detection component 131 and a buffer water tank 132. Based on this, when the deoxygenated water needs to be tested for water quality, the water in the make-up water tank 110 can pass through the detection component 131, and the detection component 131 can detect the water quality of the water in the make-up water tank 110. Then, the deoxygenated water is supplied to the buffer water tank 132, and the buffer water tank 132 can adjust the flow rate, thereby facilitating the control of the pressure of the make-up water tank 110.

[0063] like Figure 1 As shown, in a feasible implementation, the source water deoxygenation unit 120 includes: a deoxygenation centrifugal pump 121, a deoxygenation column 122, an ion column 123 and a nitrogen supply pipeline 142 arranged in series.

[0064] In this technical solution, the structural composition of the source water deoxygenation unit 120 is further provided. The source water deoxygenation unit 120 may include a deoxygenation centrifugal pump 121, a deoxygenation column 122, an ion column 123 and a nitrogen supply pipe 142 arranged in series. Based on this, in the process of replenishing deoxygenated water into the water replenishing tank 110 through the source water deoxygenation unit 120, the external water source is input into the source water deoxygenation unit 120 under the action of the deoxygenation centrifugal pump 121, and then can pass through the deoxygenation column 122, the ion column 123 and the nitrogen supply pipe 142 in sequence. The oxygen in the external water source can be removed by the deoxygenation column 122, the ions can be removed by the ion column 123, and the external water source can be filtered through the nitrogen supply pipe 142 to remove particulate matter in the external water source. Based on this, after the external water source passes through the source water deoxygenation unit 120, deoxygenated, deionized and de-particled deoxygenated water can be supplied to the water replenishing tank 110, thereby ensuring the quality of the deoxygenated water.

[0065] like Figure 1 As shown, in a feasible embodiment, the source water deoxygenation unit 120 includes: a first bypass pipe, the first bypass pipe is connected to the output end of the deoxygenation centrifugal pump 121, and the deoxygenation centrifugal pump 121, the deoxygenation column 122, the ion column 123 and the nitrogen supply pipe 142 are connected to the first bypass pipe; a source water control valve, the source water control valve is arranged on the series pipeline of the deoxygenation centrifugal pump 121, the deoxygenation column 122, the ion column 123 and the nitrogen supply pipe 142 and on the first bypass pipe, so that the deoxygenation column 122, the ion column 123 and the nitrogen supply pipe 142 can be connected in parallel with the deoxygenation centrifugal pump 121; a flow meter 125, the flow meter 125 is connected to the output end of the deoxygenation centrifugal pump 121.

[0066] In this technical solution, the structural composition of the source water deoxygenation unit 120 is further provided. The source water deoxygenation unit 120 may also include a first bypass pipeline and a source water control valve. The source water control valve may include a plurality of control valves. Based on this, the source water control valve is used in combination with the first bypass pipeline to switch the use state of the deoxygenation column 122, the ion column 123 and the nitrogen supply pipeline 142, so that the deoxygenation column 122, the ion column 123 and the nitrogen supply pipeline 142 can be connected in parallel, thereby controlling the water to selectively pass through the deoxygenation column 122, the ion column 123 and the nitrogen supply pipeline 142. 3 and one of the nitrogen supply pipeline 142. This arrangement is based on the consideration that, as the storage time of the deoxygenated water in the water replenishment tank 110 increases, the water quality of the deoxygenated water may change. However, in this case, the change in water quality may be unidirectional, for example, only the oxygen content may increase, or only the ions may increase, or only the impurity particles may increase. In this case, only one of the deoxygenation column 122, the ion column 123 and the nitrogen supply pipeline 142 can be selectively used to treat the deoxygenated water, which can improve the treatment efficiency and save more energy.

[0067] In this technical solution, the flow meter 125 is provided to facilitate determination of the supply amount of source water.

[0068] like Figure 1 As shown, in a feasible embodiment, the detection component 131 includes: a conductivity meter 1311, a dissolved oxygen meter 1312 and a pH meter 1313 connected in parallel, and the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313 are connected to the water replenishment tank 110 and the cache water tank 132.

[0069] In this technical solution, the structural composition of the detection component 131 is further provided. The detection component 131 may include a conductivity meter 1311, a dissolved oxygen meter 1312 and a pH meter 1313. Based on this, indicators such as dissolved oxygen, conductivity, and pH value of water quality can be detected, so as to facilitate determining the water quality of the deoxygenated water stored in the water replenishment tank 110.

[0070] In this technical solution, the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313 allow the deoxygenated water in the water replenishment tank 110 to pass through the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313 independently, thereby improving the detection efficiency and detection accuracy.

[0071] like Figure 1 As shown, in a feasible embodiment, the water quality detection unit 130 also includes: a condenser 133, the condenser 133 is connected to the condenser 133 connected to the water replenishment tank 110; a water pump 134, the water pump 134 is arranged between the cache water tank 132 and the water replenishment tank 110, connecting the cache water tank 132 and the water replenishment tank 110; and a dosing port 135, the dosing port 135 is connected to the cache water tank 132.

[0072] In this technical solution, the structural composition of the water quality detection unit 130 is further provided, and the water quality detection unit 130 may include a condenser 133, a water pump 134 and a dosing port 135. Such a configuration is considered that when performing cyclic deoxygenation, if the temperature of the deoxygenated water is high, the source water deoxygenation unit 120 may be damaged. Through the configuration of the condenser 133, after the deoxygenated water in the water supply tank 110 is heated by the heating unit 160, the deoxygenated water can be cooled by the condenser 133, and the condensed water after cooling can be cyclically deoxygenated, which can improve the service life of the source water deoxygenation unit 120. By setting up the water pump 134, deoxygenated water can be drawn through the water replenishment tank 110 and supplied to the water quality detection unit 130; by setting up the dosing port 135, the reagent required for the process can be added into the buffer water tank 132 through the dosing port 135, and then the deoxygenated water mixed with the reagent can be returned to the water replenishment tank 110. By adding the reagent into the water replenishment tank 110 through the buffer water tank 132, the probability of the deoxygenated water in the water replenishment tank 110 contacting with the air can be reduced, thereby reducing the oxygen content of the deoxygenated water in the water replenishment tank 110.

[0073] In a feasible embodiment, the water quality detection unit 130 also includes: a second bypass pipe, the second bypass pipe is connected to the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313; a water quality control valve, the water quality control valve is arranged on the pipe connected in series with the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313 and / or on the second bypass pipe, so that the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313 can be connected in parallel.

[0074] In this technical solution, the water quality detection unit 130 may also include a second bypass pipe and a water quality control valve, based on which the connectivity of the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313 can be changed, so that the conductivity meter 1311, the dissolved oxygen meter 1312 and the pH meter 1313 can also be connected in series, thereby improving the detection efficiency.

[0075] It will be appreciated that the water quality control valve may include a plurality of control valves.

[0076] like Figure 1 As shown, in a feasible implementation, the water quality detection unit 130 further includes: a filter 136 , which is disposed at the inlet end of the detection component 131 ; and a circulation pump 137 , which is connected to the water replenishment tank 110 and the filter 136 .

[0077] In this technical solution, the structural composition of the water quality detection unit 130 is further provided. The water quality detection unit 130 can also include a filter 136 and a circulation pump 137. Based on this, through the setting of the filter 136 and the circulation pump 137, the liquid stored in the water replenishment tank 110 can also be filtered, which can improve the cleanliness of the deoxygenated water.

[0078] like Figure 1 As shown, in a feasible embodiment, the nitrogen replenishing unit 140 includes: a nitrogen source 141; a nitrogen supply pipeline 142, the nitrogen supply pipeline 142 is connected to the nitrogen source 141 and the water replenishing tank 110; a nitrogen control valve, the nitrogen control valve is arranged on the nitrogen supply pipeline 142 to control the supply and pressure relief of nitrogen.

[0079] In this technical solution, the structural composition of a nitrogen replenishing unit 140 is further provided. The nitrogen replenishing unit 140 may include a nitrogen source 141, a nitrogen supply pipeline 142 and a nitrogen control valve. The nitrogen control valve may include a plurality of control valves. Based on this, the gas output by the nitrogen source 141 may be supplied to the water replenishing tank 110 through the nitrogen supply pipeline 142, and the start and stop of the nitrogen supply may be controlled by the nitrogen control valve.

[0080] In a feasible implementation, the heating unit 160 includes: a plurality of groups of armored electric heating wires, the armored electric heating wires are wound around the water supply tank 110; and a thermal insulation layer, the thermal insulation layer covers the armored electric heating wires.

[0081] In this technical solution, the structural composition of the heating unit 160 is further provided. The heating unit 160 may include multiple groups of armored electric heating wires and a thermal insulation layer. The armored electric heating wires can provide heat energy to the water supply tank 110, and the thermal insulation layer can prevent the dissipation of heat energy, thereby improving the heating efficiency and reducing energy consumption.

[0082] like Figure 1 As shown, in a feasible implementation manner, the water replenishment tank 110 includes: a tank body 111; and an agitator 112, wherein the agitator 112 is disposed in the tank body 111.

[0083] In this technical solution, the structure of a water replenishment tank 110 is further provided. The water replenishment tank 110 may include a tank body 111 and an agitator 112. After the deoxygenated water is added with the agent in the buffer water tank 132, it can flow back into the water replenishment tank 110, and then the agitator 112 can improve the dissolution efficiency of the agent and make the distribution of the agent more uniform.

[0084] It is understandable that the tank body 111 may be a sealed tank body 111 to reduce the probability of the deoxygenated water in the tank body 111 coming into contact with oxygen.

[0085] In a feasible implementation, the source water deoxygenation system further includes: a circulating deoxygenation pipeline 150 , one end of which is connected to the water replenishment tank 110 , and the other end of which is connected to the source water deoxygenation unit 120 .

[0086] In this technical solution, the structural composition of the source water deoxygenation system is further provided. The source water deoxygenation system may also include a circulating deoxygenation pipeline 150, based on which the source water deoxygenation unit 120 and the circulating deoxygenation pipeline 150 can be opened, and the passage between the external water source and the source water deoxygenation unit 120 can be closed. In this case, the deoxygenated water in the make-up water tank 110 can circulate between the source water deoxygenation unit 120 and the make-up water tank 110 through the circulating deoxygenation pipeline 150, and circulating deoxygenation can be performed, the deoxygenation efficiency can be improved, and the deoxygenated water in the make-up water tank 110 can always be in a high water quality state.

[0087] like Figure 2 As shown, according to the second aspect of the embodiment of the present application, a deoxygenation method is proposed, which is applied to the source water deoxygenation system of any of the above technical solutions, and the deoxygenation method includes:

[0088] Step 201: In response to a source water deoxygenation instruction, the source water deoxygenation unit is turned on to allow the source water to enter the water supply tank through the source water deoxygenation unit;

[0089] Step 202: Open the circulation pipeline of the source water deoxygenation system to perform circulation deoxygenation;

[0090] Step 203: In response to the heating instruction, controlling the heating unit to be turned on intermittently so that the water temperature in the water supply tank is maintained at a first threshold;

[0091] Step 204: In response to the nitrogen charging instruction, the nitrogen replenishing unit is turned on to replenish nitrogen into the water replenishing tank;

[0092] Step 205: In response to the water quality detection instruction, start the water quality detection unit to obtain the water quality detection result;

[0093] Step 206: Based on the water quality test results, determine the opening method of the circulation pipeline and the source water deoxygenation unit.

[0094] The deoxygenation method provided in the embodiment of the present application is applied to a source water deoxygenation system such as any of the above-mentioned technical solutions, so the deoxygenation method has all the beneficial effects of the source water deoxygenation system of the above-mentioned technical solutions.

[0095] The deoxygenation method provided in the embodiment of the present application can respond to the source water deoxygenation instruction and turn on the source water deoxygenation unit when introducing an external water source to replenish water in the water replenishment tank, so that the source water enters the water replenishment tank through the source water deoxygenation unit. In this case, deoxygenated water can be stored in the water replenishment tank.

[0096] The deoxygenation method provided in the embodiment of the present application can control the intermittent opening of the heating unit in response to the heating instruction to maintain the water temperature in the water supply tank at a first threshold value, based on which the oxygen solubility of the deoxygenated water can be reduced.

[0097] The deoxygenation method provided in the embodiment of the present application can respond to the nitrogen filling instruction, start the nitrogen replenishing unit, and replenish nitrogen into the water replenishing tank. Based on this, the probability of oxygen contacting the deoxygenated water can be reduced, and the water quality of the deoxygenated water can be guaranteed.

[0098] The deoxygenation method provided in the embodiment of the present application can respond to the water quality detection instruction, open the water quality detection unit, and obtain the water quality detection result; based on the water quality detection result, determine the opening method of the circulation pipeline and the source water deoxygenation unit. Specifically, when the water quality detection result does not meet the process requirements, the circulation pipeline and the source water deoxygenation unit can be opened to allow the deoxygenated water in the water supply tank to flow through the source water deoxygenation unit for re-deoxygenation, which can ensure the water quality.

[0099] Example

[0100] An embodiment of the present application provides a source water deoxygenation system that can be used in an irradiation test circuit, the system comprising a source water deoxygenation unit 120, a water quality detection unit 130, a nitrogen replenishment unit 140, a water replenishment tank 110 and a circulating deoxygenation pipeline 150, which can respectively complete the functions of source water deoxygenation purification, heating and sealed storage of deoxygenated water, and online monitoring of water quality.

[0101] Among them, the source water deoxygenation unit 120 includes two deoxygenation centrifugal pumps 121, a deoxygenation column 122, an ion column 123, and a nitrogen supply pipeline 142. In order to meet the requirements of the working conditions and loop operation of the deoxygenation resin, the system deoxygenation flow rate is designed to be 10-15L / min. The deoxygenation column 122 and the ion column 123 use organic glass containers with a volume of 50L. The resin uses nuclear grade resin, and each liter of resin can treat 1 ton of deionized water. The water from the reactor production water tank is pumped out through the deoxygenation centrifugal pump 121, flows through the corresponding resin column as needed, and is injected into the water supply tank 110 through the nitrogen supply pipeline 142 after the reaction. The water supply tank 110 is connected to the inlet of the deoxygenation pump through a pipeline. When the storage water quality index of the water supply tank 110 does not meet the requirements, the storage water extracted from the water supply tank 110 is circulated and deoxygenated again by a centrifugal pump until the water quality meets the requirements. The deaerator centrifugal pump 121 is operated in a one-in-use and one-in-standby mode, and the deaerator column 122 and the ion column 123 are both provided with bypass valves, which can respectively realize the input and removal functions to meet actual needs.

[0102] The heating unit 160 can be heated by armored electric heating wires, which is convenient for on-site installation. The deionized water in the tank body 111 is heated to 80°C by heating and heat conduction of the armored electric heating wires to the tank body 111. There are 12 armored electric heating wires in total, with a single power of 2.5KW and a total power of 30kW. Each armored electric heating wire is wrapped around the tank body 111 for one week. The armored electric heating wires are connected in a star shape in groups of 3, connected to an on-site transfer box, and powered by the main cable between the transfer box and the control box. The armored electric heating wires are arranged as follows: Figure 2 , the armored electric heating wire is wound around the lower part of the tank body 111, and the specific position is from the bottom to between the tank body 1111 / 2-2 / 3. The heating wire at the bottom head position is arranged according to the actual situation on site. The armored electric heating wire needs to be tightly wound with the tank body 111, and the gap in the middle is as small as possible to ensure the heat transfer efficiency. After the heating wire is wound, the insulation measure of wrapping insulation cotton is adopted on the outside to avoid a large amount of heat loss and improve the heating efficiency. In order to ensure that the liquid in the tank body 111 is heated evenly, a heating stirrer 112 is designed and installed on the top of the tank body 111. The motor of the stirrer 112 is fixed on the top of the tank body 111, and the motor is connected to a stirring fan blade through a connecting rod, and the fan blade penetrates into the bottom of the tank body 111. The length of the connecting rod is 0.8m, and the diameter of the stirrer 112 fan blade is 200mm. During heating, the liquid in the tank body 111 is slightly stirred by the stirrer 112 to make the liquid heated evenly. The blades and connecting rods of the agitator 112 are made of stainless steel to ensure that the water quality is not polluted. At the same time, the sealing treatment of the connection between the agitator and the tank body 111 is carried out, and the sealing form of the tank body 111 is planned and designed for construction, requiring that when 0.5Mpa nitrogen is filled in the tank body 111, the tank body 111 does not leak.

[0103] The water quality detection unit 130 includes a dissolved oxygen meter 1312, a conductivity meter 1311, a pH meter 1313, a condenser 133, a buffer water tank 132, a pump 134, as well as valves, pipes, other instruments and accessories. The main materials of the system are all made of stainless steel. The detection system is set behind the water supply tank 110, connected to the bottom pipe of the water supply tank 110 through relevant valves, and a small flow detection water sample is drawn from the water supply tank 110, which can perform online detection of the dissolved oxygen, conductivity and pH value of the source water. The detection data can be transmitted to the computer for display and output. The tested water sample can be returned to the water supply tank 110 through the pump 134, or it can be directly discharged to the floor drain through the buffer water tank 132. The buffer water tank 132 is provided with a liquid level meter, and the liquid level signal is interlocked with the pump 134. When the liquid level rises to 30cm, the pump 134 can be automatically turned on, and when the liquid level drops to 10cm, the pump 134 automatically stops. The buffer water tank 132 is also provided with a drug adding port 135 , which can be used to add chemicals into the water replenishment tank 110 .

[0104] The nitrogen supply unit 140 may include a nitrogen source 141, which may be composed of a nitrogen bottle, a pressure reducing valve, a pressure relief valve, a pressure gauge, a nitrogen supply pipeline 142, a valve and other accessories, so that the nitrogen pressure in the water supply tank 110 can be maintained at a certain level. The system is provided with a pressure relief valve to prevent the pressure in the water supply tank 110 from exceeding the standard, and the pressure relief valve automatically opens when the pressure exceeds 0.12MPa. The nitrogen filling operation of the water supply tank 110 can be automatically controlled, and the pressure signal is interlocked with the solenoid valve. When the pressure of the water supply tank 110 is low, the nitrogen filling is automatically started, and the nitrogen filling is stopped when the pressure reaches a fixed value.

[0105] Combined with Figure 1 The source water deoxygenation system may include the following steps during the deoxygenation operation:

[0106] 1. Open valves 2B22, 2B24, and 2B31, and close valves 2B23, 2B25, 2B29, 2B33, 2 Gas 30, 2 Gas 34, 2 Water 30, 2 Water 31, 2 Water 34, and 2 Water 35.

[0107] 2. Start the 2# deoxygenation centrifugal pump 121 and open the 2B30 valve for preliminary deoxygenation. 3. After the liquid level in the water supply tank 110 meets the requirements, close the 2B30 valve and stop the 2# deoxygenation centrifugal pump 121.

[0108] 4. Close valve 2B22, open valve 2B21, start 2# deoxygenation centrifugal pump 121, and open valve 2B30 for cyclic deoxygenation.

[0109] 5. Check the oxygen concentration and other indicators of the water supply tank 110. When the requirements are met, close the 2B30 valve and stop the 2# deoxygenation centrifugal pump 121.

[0110] Combined with Figure 1 The source water deoxygenation system may include the following steps during the heating and stirring process:

[0111] 1. Check that the water supply tank 110, the heating unit 160 and the agitator 112 are powered normally.

[0112] 2. Set the heating unit 160 in the control box to automatically track the temperature to 80°C.

[0113] 3. Start the heating stirrer 112 intermittently.

[0114] 4. After the temperature of the water supply tank 110 reaches 80°C, stop the heating stirrer 112 and set the control switch of the electric heater of the water supply tank 110 to the automatic position.

[0115] Combined with Figure 1 The source water deoxygenation system may include the following steps during the nitrogen filling operation:

[0116] 1. Confirm that the air tightness of the water supply tank 110 is good and the exhaust valve of the water supply tank 110 is closed (or closed after nitrogen is introduced to replace the original air);

[0117] 2. Confirm that BV15 and BV16 are turned on and NV4 is turned off;

[0118] 3. Open the main valve of the nitrogen cylinder, open the pressure reducing valve (clockwise) until the pressure is reduced to the appropriate pressure, and open the NV4 valve.

[0119] 4. Close the main discharge valve of the nitrogen cylinder, close the pressure reducing valve (counterclockwise), and close the NV4 valve.

[0120] Combined with Figure 1 The source water deoxygenation system may include the following steps during the water quality detection operation:

[0121] 1. Turn on the main power switch and the corresponding air switch, turn the power key of the detection cabinet clockwise to power on the system;

[0122] 2. Confirm that the main valve of the test cabinet and the water inlet valve BV1 of the water supply tank 110 are open, and the other valves are in normal status. For details on the valve status of the source water system, see Table 1;

[0123] 3. Click "System Startup" on the test cabinet operation screen, and click the conductivity and dissolved oxygen meters to start;

[0124] 4. According to the water temperature in the water supply tank 110, adjust the tap water flow of the cooler so that the temperature after cooling does not exceed 35°C;

[0125] 5. Click the automatic mode "ON", and click the circulation pump 137 to start;

[0126] 6. Adjust the relevant valves to set the flow of each instrument.

[0127] 7. Click the circulation pump 137 to turn it off;

[0128] 8. Close the main valve of the water supply tank 110 entering the detection cabinet, and close the water inlet valve BV1; 9. Turn the power key counterclockwise to cut off the power to the system.

[0129] Table 1 Source water system valve status table

[0130]

[0131] Combined with Figure 1 The source water deoxygenation system may include the following steps in the dosing operation of the buffer water tank 132:

[0132] 1. Close BV15 and BV16 (isolate the water replenishment tank 110 to avoid leakage and waste of nitrogen in the water replenishment tank 110);

[0133] 2. Open BV11 to release the pressure of the buffer water tank 132;

[0134] 3. Open BV10 and inject the prepared solution from the dosing port 135 funnel;

[0135] 4. Close BV10 and BV11, and open BV15 and BV16;

[0136] 5. Turn on the water pump 134 to pump the liquid medicine in the buffer water tank 132 into the water replenishment tank 110.

[0137] The present application embodiment is to solve the problems of poor deoxygenation effect, deterioration of water quality during water storage, lack of real-time water quality monitoring, etc. in the current production and preparation of irradiation test loop source water. A redox resin deoxygenation method is used to design a system and method for deoxygenating source water in a high-temperature and high-pressure test loop. In actual use, the present invention embodies the following beneficial effects:

[0138] 1. Deoxygenation is more thorough. The bottom of the water supply tank 110 can be connected to the deoxygenation centrifugal pump 121 through a circulation pipeline to form a circulation loop. By using the circulation deoxygenation method, the source water can be deoxygenated more thoroughly without increasing the cost of the deoxygenation resin.

[0139] 2. Reduce the solubility of oxygen by adding an electric heating device outside the water supply tank 110 to heat the deoxygenated water to reduce the solubility of oxygen. At the same time, the heating unit 160 is equipped with an insulation layer to prevent heat loss, improve heating efficiency, and reduce the heating cost of deoxygenated water. A heating stirrer 112 is designed and installed on the top of the tank 111 of the water supply tank 110 to ensure that the liquid is heated evenly.

[0140] 3 To avoid the influence of dissolved oxygen, this embodiment prevents oxygen in the air from contacting the deoxygenated water in the water supply tank 110 by filling nitrogen into the water supply tank 110, thereby effectively avoiding the influence of dissolved oxygen on water quality.

[0141] 4. Realize the function of online water quality monitoring. In this embodiment, the water quality detection unit 130 connected to the water supply tank 110 can monitor the dissolved oxygen, conductivity, pH value and other indicators of the water in the water supply tank 110 in real time. When the water quality is abnormal, the operator can give feedback in time. The detection system is also provided with a dosing port 135, which can be used to add chemicals to the water supply tank 110.

[0142] The embodiments of the present application can be applied in the field of research reactor process system design, and particularly to the deoxygenation system of the source water of the irradiation test loop. The system aims to solve the problems existing in the production and preparation of the source water of the irradiation test loop, such as poor deoxygenation effect, deterioration of water quality during the water storage process, lack of real-time monitoring of water quality, etc., by using a circulating deoxygenation method to make the source water deoxygenated more thoroughly; by using a nitrogen sealed storage method to prevent the contact between air and deoxygenated water causing the dissolved oxygen content to exceed the standard; by using electric heating to reduce the solubility of oxygen; by adding an online water quality monitoring system, the water quality indicators in the water supply tank 110 are monitored in real time.

[0143] The system can realize the function of cyclic deoxygenation, making the source water deoxygenated more thoroughly without increasing the cost of deoxygenation resin; preventing the air from coming into contact with the deoxygenated water by storing it in a closed environment; reducing the solubility of oxygen by heating; and utilizing an online water quality monitoring system to monitor the water quality indicators in the water replenishment tank 110 in real time, and providing timely feedback when the water quality is abnormal.

[0144] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0145] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0146] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0147] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A source water deoxygenation system, characterized in that: include: Water supply tank; A source water deoxygenation unit, one end of which is connected to an external water source, and the other end of which is connected to the water supply tank; A water quality detection unit, the water quality detection unit comprising a detection component and a buffer water tank, one end of the water quality detection unit is connected to the water supply tank, and the other end is connected to the buffer water tank, and the buffer water tank is connected to the water supply tank; A nitrogen replenishing unit, wherein the nitrogen replenishing unit is connected to the water replenishing tank; A heating unit is used to provide thermal energy for the water replenishment tank.

2. The source water deoxygenation system according to claim 1, characterized in that: The source water deoxygenation unit comprises: A deoxygenating centrifugal pump, a deoxygenating column, an ion column and a resin filter are arranged in series.

3. The source water deoxygenation system according to claim 2, characterized in that: The source water deoxygenation unit comprises: a first bypass pipeline, wherein the first bypass pipeline is connected to the output end of the deaeration centrifugal pump, and the deaeration centrifugal pump, the deaeration column, the ion column and the resin filter are connected to the first bypass pipeline; a source water control valve, the source water control valve being arranged on a pipeline connected in series with a deoxygenation centrifugal pump, a deoxygenation column, an ion column and a resin filter and on a first bypass pipeline, so that the deoxygenation column, the ion column and the resin filter can be connected in parallel with the deoxygenation centrifugal pump; A flow meter is connected to the output end of the deaeration centrifugal pump.

4. The source water deoxygenation system according to claim 1, characterized in that: The detection component includes: a conductivity meter, a dissolved oxygen meter and a pH meter connected in parallel, and the conductivity meter, the dissolved oxygen meter and the pH meter are connected to the water replenishment tank and the buffer water tank.

5. The source water deoxygenation system according to claim 4, characterized in that: The water quality detection unit also includes: a condenser, the condenser being in communication with the condenser and connected to the water supply tank; A water pump, the water pump is arranged between the cache water tank and the water supply tank, connecting the cache water tank and the water supply tank; A drug adding port, the drug adding port is connected to the buffer water tank; a second bypass pipeline, wherein the second bypass pipeline is connected to the conductivity meter, the dissolved oxygen meter and the pH meter; a water quality control valve, the water quality control valve being arranged on a pipeline in which the conductivity meter, the dissolved oxygen meter and the pH meter are connected in series and / or on the second bypass pipeline, so that the conductivity meter, the dissolved oxygen meter and the pH meter can be connected in parallel; A filter, wherein the filter is arranged at the inlet end of the detection component; A circulation pump is connected to the water supply tank and the filter.

6. The source water deoxygenation system according to claim 1, characterized in that: The nitrogen replenishment unit comprises: Nitrogen; A nitrogen supply pipeline, the nitrogen supply pipeline is connected to the nitrogen source and the water supply tank; A nitrogen control valve is provided in the nitrogen supply pipeline to control the supply and pressure relief of nitrogen.

7. The source water deoxygenation system according to claim 1, characterized in that: The heating unit comprises: A plurality of groups of armored electric heating wires, wherein the armored electric heating wires are wound around the water supply tank; A thermal insulation layer is covered on the armored electric heating wire.

8. The source water deoxygenation system according to any one of claims 1 to 7, characterized in that: The water replenishment tank comprises: Tank; A stirrer is arranged in the tank body.

9. The source water deoxygenation system according to any one of claims 1 to 7, characterized in that: Also includes: A circulating deoxygenation pipeline, one end of which is connected to the water replenishment tank, and the other end of which is connected to the source water deoxygenation unit.

10. A deoxygenation method, characterized in that: The source water deoxygenation system according to any one of claims 1 to 9 is applied, wherein the deoxygenation method comprises: In response to the source water deoxygenation instruction, the source water deoxygenation unit is turned on to allow the source water to enter the water supply tank through the source water deoxygenation unit; Open the circulation pipeline of the source water deoxygenation system to carry out circulation deoxygenation; In response to a heating instruction, controlling the heating unit to be turned on intermittently so that the water temperature in the water replenishment tank is maintained at a first threshold value; In response to the nitrogen charging instruction, the nitrogen replenishing unit is turned on to replenish nitrogen into the water replenishing tank; In response to a water quality detection instruction, the water quality detection unit is turned on to obtain a water quality detection result; Based on the water quality detection result, the opening method of the circulation pipeline and the source water deoxygenation unit is determined.

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