WO2022256995A1 - Three-dimensional array circuit-based system and method for detecting leakage in molten salt storage tank - Google Patents
Three-dimensional array circuit-based system and method for detecting leakage in molten salt storage tank Download PDFInfo
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- WO2022256995A1 WO2022256995A1 PCT/CN2021/098751 CN2021098751W WO2022256995A1 WO 2022256995 A1 WO2022256995 A1 WO 2022256995A1 CN 2021098751 W CN2021098751 W CN 2021098751W WO 2022256995 A1 WO2022256995 A1 WO 2022256995A1
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- 150000003839 salts Chemical class 0.000 title claims abstract description 89
- 238000003860 storage Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 43
- 239000012774 insulation material Substances 0.000 claims abstract description 22
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- 239000007788 liquid Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
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- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
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- 230000006866 deterioration Effects 0.000 description 2
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- 238000009529 body temperature measurement Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
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- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/48—Arrangements of indicating or measuring devices
- B65D90/50—Arrangements of indicating or measuring devices of leakage-indicating devices
- B65D90/513—Arrangements of indicating or measuring devices of leakage-indicating devices comprising electrically conductive layers in walls
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
Definitions
- the heat transfer and storage material is preferably a fluid with a large heat capacity and density but a low vapor pressure.
- Low cost and good transport properties (low viscosity and high thermal conductivity) of the fluid are also important for efficient heat transfer and thermal energy transport.
- the fluid must be compatible or low corrosive to the thermal storage vessel, piping, and fluid transfer valves. Based on the above considerations, molten salt is considered to be one of the best choices for heat transfer and storage media in solar thermal power plants.
- Confirm the location of the molten salt leakage according to the alarm channel specifically: first confirm the longitudinal coordinates of the intersection point according to the alarm channel, and confirm the transverse direction of the intersection point further according to the numerical value of the electrical signal because the resistance values of the second fixed-value resistors connected by each longitudinal wire are different. Coordinates, the area where the intersection is located is the molten salt leakage location.
Abstract
The present invention relates to the field of detection and handling of leakage in molten salt storage tanks in photothermal power plants. Disclosed are a three-dimensional array circuit-based system and method for detecting leakage in a molten salt storage tank, the system comprising a three-dimensional array wire group buried in a basic thermal insulation material of a molten salt storage tank. The three-dimensional array wire group is composed of a group of transversal parallel wires and a group of longitudinal parallel wires arranged at different height layers; the transversal wires and longitudinal wires are connected to other components by means of connecting wires to form a detection circuit comprising multiple loops; and each detection loop is provided with a DC power supply, a switch, and a constant-value resistor connected in series. The detection system also comprises a data acquisition device having multiple acquisition channels; the fixed-value resistors connected by the transversal wires in respective loops are respectively connected to different acquisition channels; and leakage positions of the molten salt storage tank are located according to changes of channel electrical signals caused by the leakage of molten salt. The present invention realizes rapid detection and precise positioning of the leakage in the molten salt storage tank, thereby preventing tremendous economic loss caused by expansion of the leakage area of the storage tank.
Description
本发明涉及光热电站熔盐储罐的泄漏检测和处理领域，尤其涉及一种熔盐储罐泄漏的立体阵列式电路检测系统和方法。The invention relates to the field of leakage detection and treatment of molten salt storage tanks in photothermal power stations, in particular to a three-dimensional array circuit detection system and method for leakage of molten salt storage tanks.
在众多可再生能源利用技术中，太阳能热发电技术以其高效、低运行成本和良好的放大潜力而备受关注。据估计，到2050年，太阳能热发电将占全球发电量的11.3％。相对于其他可再生能源利用技术，太阳能热发电技术的固有优势在于其与储热系统的集成，储热系统克服了太阳能热发电的间歇性和波动性，显著提高其可靠性和经济竞争力。目前全球正在运营的太阳能热发电站中，45.5％的电站配备了储热系统。Among many renewable energy utilization technologies, solar thermal power generation technology has attracted much attention due to its high efficiency, low operating cost and good scaling potential. It is estimated that by 2050, solar thermal power will account for 11.3% of global electricity generation. Compared with other renewable energy utilization technologies, the inherent advantage of solar thermal power generation technology lies in its integration with heat storage systems, which overcome the intermittent and fluctuating nature of solar thermal power generation, significantly improving its reliability and economic competitiveness. 45.5% of the solar thermal power stations currently in operation around the world are equipped with heat storage systems.
为了将热能储存在一个紧凑或最小的体积内，传热蓄热材料最好是具有大的热容和密度但蒸汽压较低的流体。为了实现高效的传热和热能输送，流体的低成本和良好的输送性能(低粘度和高导热性)也很重要。此外，流体还必须与储热容器、管道和流体输送阀门兼容或具有低腐蚀性。基于上述考虑，熔盐被认为是太阳能热发电站传热蓄热介质的最佳选择之一。To store thermal energy in a compact or minimal volume, the heat transfer and storage material is preferably a fluid with a large heat capacity and density but a low vapor pressure. Low cost and good transport properties (low viscosity and high thermal conductivity) of the fluid are also important for efficient heat transfer and thermal energy transport. In addition, the fluid must be compatible or low corrosive to the thermal storage vessel, piping, and fluid transfer valves. Based on the above considerations, molten salt is considered to be one of the best choices for heat transfer and storage media in solar thermal power plants.
由于罐体容量大、底面积大、介质工作温度高、循环的充排盐过程造成热应力较大及设计制造技术不成熟等特点，光热发电机组熔盐储罐的泄漏已成为世界性的难题。世界范围内已发生过多起熔盐储罐泄漏事故，造成重大的经济损失，甚至导致机组长时间停机。尤其是，熔盐储罐泄漏往往存在由小及大，长时间蔓延扩大的逐步恶化过程。因此，为保证光热电站的正常运行，对熔盐储罐泄漏进行早期检测，早发现早处理，避免泄漏扩大及恶化，就显得尤为重要。Due to the characteristics of large tank capacity, large bottom area, high working temperature of the medium, large thermal stress caused by the cyclic salt filling and discharging process, and immature design and manufacturing technology, the leakage of molten salt storage tanks of photothermal power generation units has become a worldwide problem. problem. There have been many leakage accidents of molten salt storage tanks around the world, causing major economic losses and even long-term shutdown of the unit. In particular, the leakage of molten salt storage tanks often has a gradual deterioration process from small to large, spreading and expanding over a long period of time. Therefore, in order to ensure the normal operation of the solar thermal power station, it is particularly important to detect the leakage of the molten salt storage tank at an early stage, to detect and deal with it early, and to avoid the expansion and deterioration of the leakage.
目前光热电站主要通过在熔盐储罐的基础中预埋一定数量的热电偶来检测熔盐泄漏，如公开号为CN 110296924 A和CN 207850563 U的申请文件提供的熔盐泄漏测试装置。然而，考虑成本、安装难度以及热电偶安装后对基础结构和特性的破坏等因素，预埋的热电偶数量有限，导致单个热电偶需要检测的区域过大。而热电偶又是一种点式测温技术，除非泄漏点正好处于热电偶的上方附近，才能检测到温度变化。因此， 这种方式无法实现对整个熔盐储罐基础的良好覆盖。At present, photothermal power stations mainly detect molten salt leakage by embedding a certain number of thermocouples in the foundation of the molten salt storage tank, such as the molten salt leakage test device provided by the application documents with publication numbers CN 110296924 A and CN 207850563 U. However, considering factors such as cost, installation difficulty, and damage to the basic structure and characteristics of thermocouples after installation, the number of pre-embedded thermocouples is limited, resulting in an excessively large area to be detected by a single thermocouple. The thermocouple is a point-type temperature measurement technology, and the temperature change can only be detected unless the leak point is just above the thermocouple. Therefore, this method cannot achieve good coverage of the entire molten salt storage tank foundation.
发明内容Contents of the invention
为了克服上述现有技术存在的问题，本发明的目的在于提供一种熔盐储罐泄漏的立体阵列式电路检测系统和方法，所提出的系统实现了对熔盐储罐泄漏的快速检测和精确定位，以避免储罐泄漏事故扩大造成巨大经济损失。所述立体阵列式电路埋入罐基隔热材料中的导线数目可根据实际熔盐储罐尺寸及检测灵敏度需求进行选取，以实现对整个罐基的良好覆盖。此外，所提出的立体阵列式电路成本较低、铺设方便、对罐基结构和特性影响较小，适合大规模推广应用。In order to overcome the above-mentioned problems in the prior art, the purpose of the present invention is to provide a three-dimensional array circuit detection system and method for molten salt storage tank leakage. The proposed system realizes rapid and accurate detection of molten salt storage tank leakage. Positioning to avoid huge economic losses caused by the expansion of storage tank leakage accidents. The number of wires embedded in the tank base heat insulation material of the three-dimensional array circuit can be selected according to the actual size of the molten salt storage tank and the detection sensitivity requirements, so as to achieve good coverage of the entire tank base. In addition, the proposed three-dimensional array circuit is low in cost, easy to lay, and has little impact on the structure and characteristics of the tank base, which is suitable for large-scale application.
为实现上述目的，本发明的技术方案如下：To achieve the above object, the technical scheme of the present invention is as follows:
一种熔盐储罐泄漏的立体阵列式电路检测系统，包括直流电源、开关、第一定值电阻、第二定值电阻、数据采集装置以及埋覆在熔盐储罐基础隔热材料中的立体阵列式导线组，所述立体阵列式导线组包括设置在不同高度层的横向平行导线组和纵向平行导线组；A three-dimensional array circuit detection system for molten salt storage tank leaks, including a DC power supply, a switch, a first fixed-value resistor, a second fixed-value resistor, a data acquisition device, and A three-dimensional array wire group, the three-dimensional array wire group includes a horizontal parallel wire group and a longitudinal parallel wire group arranged at different levels;
所述横向平行导线组内的每根横向导线一端分别连接第一定值电阻的一端，所述的第一定值电阻阻值相同；所述纵向平行导线组内的每根纵向导线一端分别连接第二定值电阻的一端，所述第二定值电阻阻值不同；One end of each horizontal wire in the group of horizontal parallel wires is respectively connected to one end of a first fixed-value resistor, and the resistance value of the first fixed-value resistor is the same; one end of each vertical wire in the group of longitudinal parallel wires is respectively connected to One end of the second fixed-value resistor, the second fixed-value resistor has different resistance values;
所述横向平行导线组内所有的第一定值电阻另一端均接入直流电源负极，所述纵向平行导线组内所有的第二定值电阻另一端均接入直流电源正极，横向平行导线组和纵向平行导线组通过连接导线形成包含多个回路的检测电路，每个检测电路的回路内串联有直流电源、开关、第一定值电阻和第二定值电阻；The other ends of all the first fixed-value resistors in the horizontal parallel wire group are connected to the negative pole of the DC power supply, the other ends of all the second fixed-value resistors in the longitudinal parallel wire group are connected to the positive pole of the DC power supply, and the horizontal parallel wire group A detection circuit comprising a plurality of loops is formed by connecting the longitudinal parallel wire group with the wires, and a DC power supply, a switch, a first fixed-value resistor and a second fixed-value resistor are connected in series in the loop of each detection circuit;
所述的数据采集装置包含若干采集通道，各横向导线一端连接的第一定值电阻分别接入不同的采集通道，分别采集每一个检测电路中的第一定值电阻的电信号，通过熔盐泄漏时引起的通道电信号变化定位熔盐储罐泄漏位置。The data acquisition device includes several acquisition channels, and the first fixed-value resistors connected to one end of each horizontal wire are respectively connected to different acquisition channels, and the electrical signals of the first fixed-value resistors in each detection circuit are respectively collected, and passed through the molten salt The channel electrical signal changes caused by the leakage locate the leakage position of the molten salt storage tank.
优选的，所述的立体阵列式导线组材料为347H不锈钢。Preferably, the material of the three-dimensional array wire group is 347H stainless steel.
优选的，所述横向平行导线组内的各横向导线等间距设置；所述纵向平行导线组内的各纵向导线等间距设置。Preferably, the transverse conductors in the group of transverse parallel conductors are arranged at equal intervals; the longitudinal conductors in the group of longitudinal parallel conductors are arranged at equal intervals.
优选的，所述的横向平行导线组与纵向平行导线组垂直。Preferably, the group of horizontal parallel wires is perpendicular to the group of longitudinal parallel wires.
优选的，所述横向平行导线组内的各横向导线处于熔盐储罐基础隔热材料中的同一高度层，所述纵向平行导线组内的各纵向导线处于熔盐储罐基础隔热材料中的同一 高度层。Preferably, the horizontal wires in the group of transverse parallel wires are at the same level in the foundation heat insulation material of the molten salt storage tank, and the longitudinal wires in the longitudinal parallel wire group are in the foundation heat insulation material of the molten salt storage tank the same height layer.
优选的，所述第一定值电阻和第二定值电阻阻值至少是高温熔融盐连通部分电阻阻值的10倍。Preferably, the resistance values of the first fixed-value resistor and the second fixed-value resistor are at least 10 times the resistance value of the high-temperature molten salt communication part.
优选的，所述数据采集装置的各采集通道内均装有报警装置，所述报警装置根据对应通道电信号的变化进行报警，提示熔盐储罐发生泄漏。Preferably, each acquisition channel of the data acquisition device is equipped with an alarm device, and the alarm device issues an alarm according to the change of the electrical signal of the corresponding channel, prompting that the molten salt storage tank leaks.
优选的，所述熔盐储罐基础包括多层保温隔热材料，所述的立体阵列式导线组布置在熔盐储罐基础的第一层隔热材料中，靠近罐底位置。Preferably, the foundation of the molten salt storage tank includes multiple layers of thermal insulation material, and the three-dimensional array wire group is arranged in the first layer of thermal insulation material of the foundation of the molten salt storage tank, near the bottom of the tank.
优选的，立体阵列式导线组覆盖90％以上的熔盐储罐底部面积。Preferably, the three-dimensional array wire group covers more than 90% of the bottom area of the molten salt storage tank.
利用上述的立体阵列式电路检测系统进行熔盐储罐泄漏检测的方法，包括：A method for detecting leaks of molten salt storage tanks using the above-mentioned three-dimensional array circuit detection system includes:
闭合开关，当熔盐储罐正常运行未发生熔盐泄漏时，由于横向平行导线组和纵向平行导线组不接触，各检测电路处于断路状态，电路中没有电信号；而当发生熔盐泄漏时，横向平行导线组和纵向平行导线组沿高度方向的交叉点被泄漏出来的高温液态熔盐接通，对应的检测电路形成回路，数据采集装置中对应该回路的采集通道的电信号发生变化，并触发对应报警装置报警；Close the switch, when the molten salt storage tank is in normal operation without molten salt leakage, since the horizontal parallel wire group and the longitudinal parallel wire group are not in contact, each detection circuit is in an open circuit state, and there is no electrical signal in the circuit; and when molten salt leakage occurs , the intersection point of the horizontal parallel wire group and the longitudinal parallel wire group along the height direction is connected by the leaked high-temperature liquid molten salt, the corresponding detection circuit forms a loop, and the electrical signal of the acquisition channel corresponding to the loop in the data acquisition device changes, And trigger the corresponding alarm device to alarm;
根据报警通道确认熔盐泄漏位置，具体为：首先根据报警通道确认交叉点的纵向坐标，由于各纵向导线连接的第二定值电阻阻值不同，进一步根据电信号的数值大小确认交叉点的横向坐标，交叉点位置所在区域即为熔盐泄漏位置。Confirm the location of the molten salt leakage according to the alarm channel, specifically: first confirm the longitudinal coordinates of the intersection point according to the alarm channel, and confirm the transverse direction of the intersection point further according to the numerical value of the electrical signal because the resistance values of the second fixed-value resistors connected by each longitudinal wire are different. Coordinates, the area where the intersection is located is the molten salt leakage location.
本发明的有益效果在于：The beneficial effects of the present invention are:
本发明基于高温熔融盐的导电性，首次提出了利用立体阵列式电路实现光热电站熔盐储罐泄漏检测。所提出的立体阵列式电路实现了对熔盐储罐泄漏的快速检测和精确定位，以便尽快处理，避免储罐泄漏事故扩大造成巨大经济损失。立体阵列式电路埋入罐基隔热材料中的导线数目可根据实际熔盐储罐尺寸及检测灵敏度需求进行选取，以实现对整个罐基的良好覆盖。此外，所提出的立体阵列式电路成本较低、铺设方便、对罐基结构和特性影响较小，适合大规模推广应用。Based on the conductivity of high-temperature molten salt, the present invention proposes for the first time that a three-dimensional array circuit is used to detect the leakage of a molten salt storage tank in a photothermal power station. The proposed three-dimensional array circuit realizes rapid detection and precise positioning of molten salt storage tank leakage, so as to deal with it as soon as possible, and avoid huge economic losses caused by the expansion of storage tank leakage accidents. The number of wires embedded in the tank base insulation material of the three-dimensional array circuit can be selected according to the actual molten salt storage tank size and detection sensitivity requirements, so as to achieve good coverage of the entire tank base. In addition, the proposed three-dimensional array circuit has low cost, convenient laying, and little impact on the structure and characteristics of the tank base, which is suitable for large-scale promotion and application.
图1为本发明中熔盐储罐泄漏的立体阵列式电路检测系统结构示意图。Fig. 1 is a schematic structural diagram of a three-dimensional array circuit detection system for leakage of a molten salt storage tank in the present invention.
图2为立体阵列式导线组在熔盐储罐基础隔热材料中的布置示意图。Fig. 2 is a schematic diagram of the layout of the three-dimensional array wire group in the foundation heat insulation material of the molten salt storage tank.
图3为立体阵列式导线组在熔盐储罐基础隔热材料中的俯视示意图。Fig. 3 is a schematic top view of the three-dimensional array wire group in the foundation heat insulation material of the molten salt storage tank.
图中：1为直流电源，2为连接导线，3为第二定值电阻，4为立体阵列式导线组， 5为第一定值电阻，6为开关，7为数据采集装置，8为熔盐储罐罐底，9为第一层罐基隔热材料，10为第二层罐基隔热材料，11为混凝土基础。In the figure: 1 is the DC power supply, 2 is the connecting wire, 3 is the second fixed value resistor, 4 is the three-dimensional array wire group, 5 is the first fixed value resistor, 6 is the switch, 7 is the data acquisition device, 8 is the fuse For the bottom of the salt storage tank, 9 is the first layer of tank base heat insulation material, 10 is the second layer of tank base heat insulation material, and 11 is the concrete foundation.
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明并不限于下面公开的具体实施例的限制。本文中所涉及的方位词“上”、“下”、“左”和“右”，是以对应附图为基准而设定的，可以理解，上述方位词的出现并不限定本发明的保护范围。In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the present invention is not limited to the specific embodiments disclosed below limit. The orientation words "up", "down", "left" and "right" involved in this article are set based on the corresponding drawings. It can be understood that the appearance of the above orientation words does not limit the protection of the present invention. scope.
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本发明，而不能理解为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
如图1所示，一种熔盐储罐泄漏的立体阵列式电路检测系统，包括直流电源1、连接导线2、第二定值电阻3、立体阵列式导线组4、第一定值电阻5、开关6和数据采集装置7。直流电源1、立体阵列式导线组4、第二定值电阻3、第一定值电阻5和开关6通过连接导线2连接形成包含多个回路的检测电路。各回路中的横向平行导线组连接的第一定值电阻5两端分别接入数据采集装置7的不同通道，分别采集每一个检测电路中的横向平行导线组连接的第一定值电阻5两端的电信号，数据采集装置7的不同通道内分别装有报警装置。As shown in Figure 1, a three-dimensional array circuit detection system for molten salt storage tank leaks includes a DC power supply 1, connecting wires 2, a second fixed-value resistor 3, a three-dimensional array wire group 4, and a first fixed-value resistor 5 , switch 6 and data acquisition device 7. The DC power supply 1 , the three-dimensional array wire group 4 , the second fixed value resistor 3 , the first fixed value resistor 5 and the switch 6 are connected by connecting wires 2 to form a detection circuit including multiple loops. The two ends of the first fixed-value resistor 5 connected to the horizontal parallel wire group in each loop are respectively connected to different channels of the data acquisition device 7, and the two ends of the first fixed-value resistor 5 connected to the horizontal parallel wire group in each detection circuit are respectively collected. The electrical signal at the end, the different channels of the data acquisition device 7 are equipped with alarm devices respectively.
本实施例中，横向平行导线组内的每根横向导线一端分别连接第一定值电阻5的一端，各第一定值电阻阻值相同。纵向平行导线组内的每根纵向导线一端分别连接第二定值电阻3的一端，各第二定值电阻阻值不同。为保证熔盐储罐泄漏检测的灵敏度，所述立体阵列式导线组材料应当采用具有良好导电性能和耐压、耐高温性能材料，例如347H不锈钢。此外，所述定值电阻阻值应足够大，以使所述数据采集装置的通道电信号结果受高温熔融盐连通部分电阻的影响最小化，本实施例中，第一定值电阻和 第二定值电阻阻值至少是高温熔融盐连通部分电阻阻值的10倍。In this embodiment, one end of each horizontal wire in the group of horizontal parallel wires is respectively connected to one end of the first fixed-value resistor 5 , and the resistance of each first fixed-value resistor is the same. One end of each longitudinal wire in the longitudinal parallel wire group is respectively connected to one end of the second fixed-value resistor 3 , and the resistance values of each second fixed-value resistor are different. In order to ensure the sensitivity of the leak detection of the molten salt storage tank, the material of the three-dimensional array wire group should be a material with good electrical conductivity, pressure resistance, and high temperature resistance, such as 347H stainless steel. In addition, the resistance value of the fixed-value resistor should be large enough to minimize the influence of the channel electrical signal result of the data acquisition device on the resistance of the high-temperature molten salt connection part. In this embodiment, the first fixed-value resistor and the second The resistance value of the fixed value resistor is at least 10 times of the resistance value of the connected part of the high temperature molten salt.
横向平行导线组内所有的第一定值电阻5另一端均接入直流电源1负极，纵向平行导线组内所有的第二定值电阻3另一端均接入直流电源1正极。横向平行导线组和纵向平行导线组内的各导线通过连接导线与其他组件连接形成包含多个回路的检测电路；每个检测回路内设置有串联的直流电源1、开关6、第一定值电阻5和第二定值电阻3。The other ends of all the first fixed-value resistors 5 in the horizontal parallel wire group are connected to the negative pole of the DC power supply 1, and the other ends of all the second fixed-value resistors 3 in the longitudinal parallel wire group are connected to the positive pole of the DC power supply 1. The wires in the horizontal parallel wire group and the longitudinal parallel wire group are connected with other components through connecting wires to form a detection circuit including multiple loops; each detection loop is provided with a DC power supply 1, a switch 6, and a first constant value resistor in series 5 and the second fixed value resistor 3.
所述熔盐储罐基础包括多层保温隔热材料。本实施例中，如图2和图3所示，熔盐储罐罐底8下部包括第一层罐基隔热材料9、第二层罐基隔热材料10和混凝土基础11。立体阵列式导线组4埋覆在第一层罐基隔热材料9中，包括横向平行导线组和纵向平行导线组，二者垂直且分别埋在罐基隔热材料的不同高度层，在俯视视角下呈交叉的网格形状。当熔盐储罐正常运行未发生熔盐泄漏时，横向平行导线组和纵向平行导线组不接通。The foundation of the molten salt storage tank includes multiple layers of thermal insulation materials. In this embodiment, as shown in FIG. 2 and FIG. 3 , the bottom 8 of the molten salt storage tank includes a first layer of tank base insulation material 9 , a second layer of tank base insulation material 10 and a concrete foundation 11 . The three-dimensional array wire group 4 is embedded in the first layer of tank base heat insulation material 9, including a transverse parallel wire group and a longitudinal parallel wire group, both of which are vertical and buried in different height layers of the tank base heat insulation material respectively. The angle of view is a cross grid shape. When the molten salt storage tank is in normal operation and no molten salt leakage occurs, the horizontal parallel wire group and the longitudinal parallel wire group are not connected.
实际使用时，开关6闭合。当熔盐储罐正常运行未发生熔盐泄漏时，由于横向平行导线组和纵向平行导线组不接触，各回路处于断路状态，电路中没有电信号；而当发生熔盐泄漏时，横向平行导线组和纵向平行导线组的交叉点被泄漏出来的高温液态熔盐接通，数据采集装置7中对应通道的电信号发生变化，并触发对应报警装置报警，从而实现熔盐储罐泄漏的快速检测和精确定位。其中，判断熔盐泄漏位置按照以下两个步骤：In actual use, the switch 6 is closed. When the molten salt storage tank is in normal operation without molten salt leakage, since the horizontal parallel wire group and the longitudinal parallel wire group are not in contact, each circuit is in an open circuit state, and there is no electrical signal in the circuit; and when molten salt leakage occurs, the horizontal parallel wire group The intersection point of the wire group and the longitudinal parallel wire group is connected by the leaked high-temperature liquid molten salt, the electrical signal of the corresponding channel in the data acquisition device 7 changes, and triggers the alarm of the corresponding alarm device, so as to realize the rapid detection of the leakage of the molten salt storage tank and precise positioning. Among them, the location of the molten salt leakage is judged according to the following two steps:
一、当任意回路出现电信号时，即可以确定发生泄漏的纵向位置。1. When an electrical signal appears in any circuit, the longitudinal position of the leakage can be determined.
二、由于各纵向导线连接的第二定值电阻3的大小不同，可以进一步根据电信号的数值大小判断发生泄漏的横向位置。2. Since the sizes of the second fixed-value resistors 3 connected by the longitudinal wires are different, the lateral position where the leakage occurs can be further judged according to the numerical value of the electric signal.
实际使用时，埋入罐基隔热材料中的导线数目可根据实际熔盐储罐尺寸及检测灵敏度需求进行选取，以实现对整个罐基的良好覆盖，图1中给出的三根横向导线和三根纵向导线仅作为示意，不能将其视为对本发明的限定。In actual use, the number of wires embedded in the tank base insulation material can be selected according to the actual molten salt storage tank size and detection sensitivity requirements to achieve good coverage of the entire tank base. The three horizontal wires and The three longitudinal wires are only for illustration, and should not be regarded as limiting the present invention.
由于罐基温度比罐内温度低，且罐基的温度随与罐底距离的增加而逐渐降低，因此泄漏的熔盐由于散热会最终凝固，凝固后的熔盐不具有导电性，对应回路会再次恢复断路状态。Since the temperature of the tank base is lower than the temperature inside the tank, and the temperature of the tank base decreases gradually with the increase of the distance from the tank bottom, the leaked molten salt will eventually solidify due to heat dissipation, and the solidified molten salt has no conductivity, and the corresponding circuit will Restore the disconnected state again.
以上所述仅为本发明的较佳实施举例，并不用于限制本发明，凡在本发明精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above descriptions are only examples of the preferred implementation of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention within.
Claims (10)
- 一种熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，包括直流电源(1)、开关(6)、第一定值电阻(5)、第二定值电阻(3)、数据采集装置(7)以及埋覆在熔盐储罐基础隔热材料中的立体阵列式导线组(4)，所述立体阵列式导线组包括设置在不同高度层的横向平行导线组和纵向平行导线组；A three-dimensional array circuit detection system for molten salt storage tank leakage, characterized in that it includes a DC power supply (1), a switch (6), a first fixed value resistor (5), a second fixed value resistor (3), a data The collection device (7) and the three-dimensional array wire group (4) buried in the foundation heat insulation material of the molten salt storage tank, the three-dimensional array wire group includes horizontal parallel wire groups and longitudinal parallel wire groups arranged at different heights Group;所述横向平行导线组内的每根横向导线一端分别连接第一定值电阻(5)的一端，所述的第一定值电阻阻值相同；所述纵向平行导线组内的每根纵向导线一端分别连接第二定值电阻(3)的一端，所述第二定值电阻阻值不同；One end of each horizontal wire in the group of horizontal parallel wires is respectively connected to one end of a first fixed-value resistor (5), and the resistance of the first fixed-value resistor is the same; each longitudinal wire in the group of longitudinal parallel wires One end is respectively connected to one end of the second fixed-value resistor (3), and the resistance values of the second fixed-value resistor are different;所述横向平行导线组内所有的第一定值电阻另一端均接入直流电源负极，所述纵向平行导线组内所有的第二定值电阻另一端均接入直流电源正极，横向平行导线组和纵向平行导线组通过连接导线形成包含多个回路的检测电路，每个检测电路的回路内串联有直流电源、开关、第一定值电阻和第二定值电阻；The other ends of all the first fixed-value resistors in the horizontal parallel wire group are connected to the negative pole of the DC power supply, the other ends of all the second fixed-value resistors in the longitudinal parallel wire group are connected to the positive pole of the DC power supply, and the horizontal parallel wire group A detection circuit comprising a plurality of loops is formed by connecting the longitudinal parallel wire group with the wires, and a DC power supply, a switch, a first fixed-value resistor and a second fixed-value resistor are connected in series in the loop of each detection circuit;所述的数据采集装置包含若干采集通道，各横向导线一端连接的第一定值电阻分别接入不同的采集通道，分别采集每一个检测电路中的第一定值电阻的电信号，通过熔盐泄漏时引起的通道电信号变化定位熔盐储罐泄漏位置。The data acquisition device includes several acquisition channels, and the first fixed-value resistors connected to one end of each horizontal wire are respectively connected to different acquisition channels, and the electrical signals of the first fixed-value resistors in each detection circuit are respectively collected, and passed through the molten salt The channel electrical signal changes caused by the leakage locate the leakage position of the molten salt storage tank.
- 根据权利要求1所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，所述的立体阵列式导线组材料为347H不锈钢。The three-dimensional array circuit detection system for leakage of molten salt storage tanks according to claim 1, wherein the material of the three-dimensional array wire group is 347H stainless steel.
- 根据权利要求1或2所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，所述横向平行导线组内的各横向导线等间距设置；所述纵向平行导线组内的各纵向导线等间距设置。The three-dimensional array circuit detection system for molten salt storage tank leakage according to claim 1 or 2, characterized in that, the horizontal wires in the group of horizontally parallel wires are arranged at equal intervals; Longitudinal wires are equally spaced.
- 根据权利要求3所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，所述的横向平行导线组与纵向平行导线组垂直。The three-dimensional array circuit detection system for leakage of molten salt storage tank according to claim 3, characterized in that, the group of horizontal parallel wires is perpendicular to the group of longitudinal parallel wires.
- 根据权利要求4所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，所述横向平行导线组内的各横向导线处于熔盐储罐基础隔热材料中的同一高度层，所述纵向平行导线组内的各纵向导线处于熔盐储罐基础隔热材料中的同一高度层。The three-dimensional array circuit detection system for leakage of molten salt storage tank according to claim 4, characterized in that, the horizontal wires in the group of horizontal parallel wires are located at the same level in the base heat insulation material of the molten salt storage tank, Each longitudinal wire in the group of longitudinal parallel wires is at the same level in the foundation heat insulation material of the molten salt storage tank.
- 根据权利要求1所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，所述第一定值电阻和第二定值电阻阻值至少是高温熔融盐连通部分电阻阻值的10倍。The three-dimensional array circuit detection system for leakage of molten salt storage tank according to claim 1, characterized in that the resistance values of the first fixed-value resistor and the second fixed-value resistor are at least half of the resistance value of the high-temperature molten salt communication part 10 times.
- 根据权利要求1所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于， 所述数据采集装置的各采集通道内均装有报警装置，所述报警装置根据对应通道电信号的变化进行报警，提示熔盐储罐发生泄漏。The three-dimensional array circuit detection system for molten salt storage tank leakage according to claim 1, characterized in that, each acquisition channel of the data acquisition device is equipped with an alarm device, and the alarm device is based on the electrical signal of the corresponding channel. The change will give an alarm, prompting that the molten salt storage tank leaks.
- 根据权利要求1所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，所述熔盐储罐基础包括多层保温隔热材料，所述的立体阵列式导线组布置在熔盐储罐基础的第一层隔热材料中，靠近罐底位置。The three-dimensional array circuit detection system for molten salt storage tank leakage according to claim 1, characterized in that the foundation of the molten salt storage tank includes multi-layer thermal insulation materials, and the three-dimensional array wire group is arranged in the melting In the first layer of insulation material of the foundation of the salt storage tank, near the bottom of the tank.
- 根据权利要求1所述的熔盐储罐泄漏的立体阵列式电路检测系统，其特征在于，立体阵列式导线组覆盖90％以上的熔盐储罐底部面积。The three-dimensional array circuit detection system for leakage of molten salt storage tank according to claim 1, characterized in that the three-dimensional array wire group covers more than 90% of the bottom area of the molten salt storage tank.
- 一种利用权利要求1所述的立体阵列式电路检测系统进行熔盐储罐泄漏检测的方法，其特征在于，包括：A method for detecting leaks of molten salt storage tanks using the three-dimensional array circuit detection system according to claim 1, characterized in that it comprises:闭合开关(6)，当熔盐储罐正常运行未发生熔盐泄漏时，由于横向平行导线组和纵向平行导线组不接触，各检测电路处于断路状态，电路中没有电信号；而当发生熔盐泄漏时，横向平行导线组和纵向平行导线组沿高度方向的交叉点被泄漏出来的高温液态熔盐接通，对应的检测电路形成回路，数据采集装置(7)中对应该回路的采集通道的电信号发生变化，并触发对应报警装置报警；Close the switch (6), when the molten salt storage tank is in normal operation and no molten salt leakage occurs, since the horizontal parallel wire group and the longitudinal parallel wire group are not in contact, each detection circuit is in an open circuit state, and there is no electrical signal in the circuit; When the salt leaks, the intersection point of the horizontal parallel wire group and the longitudinal parallel wire group along the height direction is connected by the leaked high-temperature liquid molten salt, and the corresponding detection circuit forms a loop, and the acquisition channel corresponding to the loop in the data acquisition device (7) The electrical signal changes and triggers the corresponding alarm device to alarm;根据报警通道确认熔盐泄漏位置，具体为：首先根据报警通道确认交叉点的纵向坐标，由于各纵向导线连接的第二定值电阻阻值不同，进一步根据电信号的数值大小确认交叉点的横向坐标，交叉点位置所在区域即为熔盐泄漏位置。Confirm the location of the molten salt leakage according to the alarm channel, specifically: first confirm the longitudinal coordinates of the intersection point according to the alarm channel, and confirm the transverse direction of the intersection point further according to the numerical value of the electrical signal because the resistance values of the second fixed-value resistors connected by each longitudinal wire are different. Coordinates, the area where the intersection is located is the molten salt leakage location.
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