CN206489457U - Dynamic high-temperature high-pressure steam oxidation test device for controlling oxygen content - Google Patents
Dynamic high-temperature high-pressure steam oxidation test device for controlling oxygen content Download PDFInfo
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000001301 oxygen Substances 0.000 title claims abstract description 76
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 76
- 238000012360 testing method Methods 0.000 title claims abstract description 49
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 33
- 230000003647 oxidation Effects 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 127
- 239000011261 inert gas Substances 0.000 claims description 31
- 238000006392 deoxygenation reaction Methods 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000012498 ultrapure water Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000010865 sewage Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000009284 supercritical water oxidation Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000011276 addition treatment Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Abstract
本实用新型公开了一种控制氧含量的动态高温高压蒸汽氧化试验装置，属于金属材料在高温高压水环境中的试验研究技术领域，该试验装置由给水组件、真空除氧组件、惰性气体除氧组件、常温循环水回路和高温高压循环水回路构成。与现有技术对比，本实用新型能实现在高温高压条件下动态蒸汽氧化试验，且能够实时监测和精确控制溶解氧含量，溶解氧含量可长期控制在10ppb以下，同时除氧效率高，蒸汽氧化试验过程中系统能够自动运行，无需看守，节约人力物力。
The utility model discloses a dynamic high-temperature and high-pressure steam oxidation test device for controlling oxygen content, which belongs to the technical field of test and research of metal materials in a high-temperature and high-pressure water environment. It is composed of components, normal temperature circulating water circuit and high temperature and high pressure circulating water circuit. Compared with the prior art, the utility model can realize the dynamic steam oxidation test under the condition of high temperature and high pressure, and can monitor and accurately control the dissolved oxygen content in real time, and the dissolved oxygen content can be controlled below 10ppb for a long time. During the test, the system can run automatically without guards, saving manpower and material resources.
Description
技术领域：Technical field:
本实用新型属于金属材料在高温高压环境中的试验研究技术领域，具体涉及一种控制氧含量的动态高温高压蒸汽氧化试验装置。The utility model belongs to the technical field of experimental research of metal materials in a high-temperature and high-pressure environment, and in particular relates to a dynamic high-temperature and high-pressure steam oxidation test device for controlling oxygen content.
背景技术：Background technique:
在火力发电领域中，随着人们对节约能源和保护环境的日益重视，机组参数不断提高，过热器、再热器、高温蒸汽管道、汽轮机转子、叶片、喷嘴等蒸汽流通部件的蒸汽侧氧化问题也越来越突出。开发适合的试验设备是研究并解决金属蒸汽氧化问题的关键，其中水化学控制和循环系统是设备的核心，为保证试验结果可靠有三个关键因素：(1)蒸汽或水中的氧含量可控，由于蒸汽中的含量会影响材料的氧化层结构以及氧化速率，蒸汽中的氧含量是否可控制到火电机组实际运行时蒸汽条件(水全挥发处理时为10ppb以下，加氧处理时为30ppb～150ppb)，即成为试验结果是否可靠的关键因素。(2)蒸汽流量不能过低，由于蒸汽氧化的反应过程中会生成H2、CrO2(OH)2等挥发性的反应产物，如果蒸汽为静态或流量过低，挥发性反应产物不能被及时带走，反应进入平衡状态，试验结果就不能真实反映材料的抗蒸汽氧化性能。(3)温度和压力应可以达到电站锅炉常见的超临界条件。除了这三个关键条件以外，系统简单可靠、方便以及节能环保也是必须考虑的。In the field of thermal power generation, as people pay more and more attention to energy conservation and environmental protection, unit parameters continue to increase, and the steam side oxidation of superheaters, reheaters, high-temperature steam pipes, steam turbine rotors, blades, nozzles and other steam circulation components is also becoming more prominent. The development of suitable test equipment is the key to research and solve the problem of metal vapor oxidation. Among them, the water chemistry control and circulation system are the core of the equipment. There are three key factors to ensure reliable test results: (1) The oxygen content in steam or water is controllable, Since the content in the steam will affect the oxide layer structure and oxidation rate of the material, whether the oxygen content in the steam can be controlled to the steam conditions during the actual operation of the thermal power unit (less than 10ppb for water full volatilization treatment, 30ppb~150ppb for oxygen addition treatment) ), which is the key factor for the reliability of the test results. (2) The steam flow rate should not be too low, because volatile reaction products such as H 2 and CrO 2 (OH) 2 will be generated during the steam oxidation reaction process. If the steam is static or the flow rate is too low, the volatile reaction products cannot be processed in time. taken away, the reaction enters an equilibrium state, and the test results cannot truly reflect the steam oxidation resistance of the material. (3) The temperature and pressure should be able to reach the supercritical conditions common to power plant boilers. In addition to these three key conditions, system simplicity, reliability, convenience, energy saving and environmental protection must also be considered.
国内外很多研究单位都开发了蒸汽或超临界水氧化试验装置，例如专利：专利CN10162661 B《金属材料高温水蒸汽氧化实验装置》、CN 103543096 A《一种动态高温高压氧化实验装置》：美国NETL实验室的蒸汽氧化装置、美国Wisconsin–Madison大学超临界水氧化装置、日本Nippon Steel公司的实验台以及浙江工业大学废水处理的超临界水氧化实验装置等设备的主要缺点是蒸汽中的氧含量等关键因素无法控制。专利申请文件200810011845.5《一种在超临界水中进行长时间氧化腐蚀实验的方法和设备》介质为静态。专利CN 101118211 B《高温蒸汽氧化试验装置》不能用于高压，且冷凝的水需要定期处理，需要消耗大量的氩气。专利CN 102519863 A《一种超临界水蒸汽氧化试验装置》实现了超临界水氧化环境，但是有以下缺点：(1)通过设定氩气和氧气的流量调节水中的溶解氧含量，调节范围小，不能达到10ppb以下，做不到实时观察和控制氧含量；(2)在水路中先设置加热棒加热，随后又设置水冷套，浪费大量电能和自来水；(3)结构复杂，水循环系统中设置三个密封结构的蒸馏水箱，且水箱上安装排水阀、观察窗、加热管、换热器等部件，安全可靠性较差。Many research institutes at home and abroad have developed steam or supercritical water oxidation test devices, such as patents: Patent CN10162661 B "High Temperature Water Vapor Oxidation Experimental Device for Metal Materials", CN 103543096 A "A Dynamic High Temperature and High Pressure Oxidation Experimental Device": US NETL The main disadvantage of the steam oxidation device in the laboratory, the supercritical water oxidation device of the University of Wisconsin–Madison in the United States, the experimental bench of Nippon Steel Company in Japan, and the supercritical water oxidation experimental device for wastewater treatment of Zhejiang University of Technology is the oxygen content in the steam, etc. Key factors cannot be controlled. Patent application document 200810011845.5 "A Method and Equipment for Long-term Oxidation and Corrosion Experiment in Supercritical Water" The medium is static. Patent CN 101118211 B "High Temperature Steam Oxidation Test Apparatus" cannot be used for high pressure, and the condensed water needs to be treated regularly, which consumes a large amount of argon. Patent CN 102519863 A "A Supercritical Water Vapor Oxidation Test Device" realizes the supercritical water oxidation environment, but has the following disadvantages: (1) The dissolved oxygen content in water is adjusted by setting the flow rate of argon and oxygen, and the adjustment range is small , can not reach below 10ppb, real-time observation and control of oxygen content cannot be achieved; (2) first set heating rod heating in the water circuit, and then set water cooling jacket, wasting a lot of electric energy and tap water; (3) complex structure, water circulation system set Three distilled water tanks with a sealed structure, and components such as drain valves, observation windows, heating pipes, and heat exchangers are installed on the water tanks, and the safety and reliability are relatively poor.
实用新型内容：Utility model content:
本实用新型的目的是为了克服现有高温高压环境下加载技术中的以上弊端，提供了一种控制氧含量的动态高温高压蒸汽氧化试验装置。The purpose of the utility model is to provide a dynamic high-temperature and high-pressure steam oxidation test device for controlling the oxygen content in order to overcome the above drawbacks in the existing high-temperature and high-pressure loading technology.
为达到上述目的，本实用新型采用如下技术方案来实现的：In order to achieve the above object, the utility model adopts the following technical solutions to realize:
控制氧含量的动态高温高压蒸汽氧化试验装置，包括给水组件、真空除氧组件、惰性气体除氧组件、常温循环水回路、高温高压水回路和高压反应釜及加热组件；其中，Dynamic high-temperature and high-pressure steam oxidation test device for controlling oxygen content, including water supply components, vacuum deaeration components, inert gas deoxygenation components, normal temperature circulating water circuit, high temperature and high pressure water circuit, high pressure reactor and heating components; among them,
给水组件包括储水桶，储水桶顶部管路依次通过背压阀A和单向阀A与大气相连通；The water supply component includes a water storage tank, and the pipeline on the top of the water storage tank is connected to the atmosphere through the back pressure valve A and the one-way valve A in sequence;
真空除氧组件包括真空泵；The vacuum deaeration component includes a vacuum pump;
惰性气体除氧组件包括比例电磁阀、单向阀B和惰性气体气瓶；Inert gas deoxygenation components include proportional solenoid valve, check valve B and inert gas cylinder;
常温循环水回路包括循环泵、流通池和溶解氧表；The normal temperature circulating water circuit includes a circulating pump, a flow cell and a dissolved oxygen meter;
高温高压水回路包括高压计量泵、阻尼器、换热器、冷凝器和背压阀B；High temperature and high pressure water circuit includes high pressure metering pump, damper, heat exchanger, condenser and back pressure valve B;
高压反应釜及加热组件包括釜体加热炉和高压反应釜；High-pressure reaction kettle and heating components include kettle body heating furnace and high-pressure reaction kettle;
其中，真空泵通过管路与储水桶相连通；Wherein, the vacuum pump is connected with the water storage tank through a pipeline;
惰性气体气瓶通过管路以及设置该管路上的单向阀B和比例电磁阀与储水桶的惰性气体入口相连通；The inert gas cylinder communicates with the inert gas inlet of the water storage tank through the pipeline and the check valve B and proportional solenoid valve on the pipeline;
流通池通过管路以及设置该管路上的循环泵和溶解氧表与储水桶形成常温循环水回路；The circulation pool forms a normal temperature circulating water circuit through the pipeline and the circulating pump and dissolved oxygen meter on the pipeline and the water storage tank;
高压计量泵、阻尼器、换热器、冷凝器和背压阀通过管路与储水桶形成高温高压水回路；The high-pressure metering pump, damper, heat exchanger, condenser and back pressure valve form a high-temperature and high-pressure water circuit through the pipeline and the water storage tank;
高压反应釜设置在釜体加热炉内，釜体加热炉通过管路与换热器形成水循环回路。The high-pressure reaction kettle is set in the heating furnace of the kettle body, and the heating furnace of the kettle body forms a water circulation loop through the pipeline and the heat exchanger.
本实用新型进一步的改进在于，给水组件还包括高纯水机和给水泵，给水泵用于将高纯水机制取的高纯水加入至储水桶中。A further improvement of the utility model is that the water supply assembly also includes a high-purity water machine and a water-feed pump, and the water-feed pump is used to add high-purity water from the high-purity water machine into the water storage bucket.
本实用新型进一步的改进在于，给水组件还包括设置在储水桶底部的排污口，以及设置在储水桶侧面的水位计。A further improvement of the utility model lies in that the water supply assembly further includes a sewage discharge port arranged at the bottom of the water storage bucket, and a water level gauge arranged at the side of the water storage bucket.
本实用新型进一步的改进在于，真空除氧组件还包括设置在真空泵与储水桶相连通的管路上的压力表A。A further improvement of the utility model is that the vacuum deaeration component also includes a pressure gauge A arranged on the pipeline connecting the vacuum pump and the water storage tank.
本实用新型进一步的改进在于，惰性气体气瓶还包括通过信号线与溶解氧表和比例电磁阀相连接的溶解氧控制系统。The further improvement of the utility model is that the inert gas cylinder also includes a dissolved oxygen control system connected with a dissolved oxygen meter and a proportional solenoid valve through a signal line.
本实用新型进一步的改进在于，常温循环水回路还包括设置在管路上的阀门。The further improvement of the utility model lies in that the normal temperature circulating water loop also includes a valve arranged on the pipeline.
本实用新型进一步的改进在于，流通池内装有溶解氧传感器，溶解氧传感器的信号通过溶解氧表整合为4-20mA的电流信号，该电流信号传递到所述溶解氧控制系统，溶解氧控制系统根据实测溶解氧值和设定溶解氧值计算出4-20mA控制信号，输出到比例电磁阀上，控制其开关比例，进而控制惰性气体通入量。The further improvement of the utility model is that a dissolved oxygen sensor is installed in the flow cell, and the signal of the dissolved oxygen sensor is integrated into a 4-20mA current signal through a dissolved oxygen meter, and the current signal is transmitted to the dissolved oxygen control system, and the dissolved oxygen control system Calculate the 4-20mA control signal according to the measured dissolved oxygen value and the set dissolved oxygen value, and output it to the proportional solenoid valve to control its switching ratio, and then control the inert gas intake.
本实用新型进一步的改进在于，高温高压水回路还包括设置在管路上的单向阀C、压力表B、第一过滤器和泄压阀。A further improvement of the utility model is that the high temperature and high pressure water circuit also includes a check valve C, a pressure gauge B, a first filter and a pressure relief valve arranged on the pipeline.
本实用新型进一步的改进在于，高温高压水回路还包括冷水机，该冷水机通过管路与冷凝器形成水循环回路。The further improvement of the utility model is that the high temperature and high pressure water circuit also includes a water chiller, and the water chiller forms a water circulation loop through pipelines and a condenser.
与现有技术相比，本实用新型中给水组件为试验装置提供高纯水，真空除氧组件、惰性气体除氧组件和常温循环水回路三者配合精确控制回路中溶解氧含量，高温高压回路和高压反应釜及加热组件为蒸汽氧化试验提供高温高压环境，同时实现动态循环。具体来说，本实用新型试验装置的有益效果在于：Compared with the prior art, the water supply component in the utility model provides high-purity water for the test device, and the vacuum deoxygenation component, the inert gas deoxygenation component and the normal temperature circulating water circuit cooperate to precisely control the dissolved oxygen content in the circuit, the high temperature and high pressure circuit and the high pressure The reaction kettle and heating components provide a high temperature and high pressure environment for the steam oxidation test, and realize dynamic circulation at the same time. Specifically, the beneficial effects of the utility model test device are:
1、本实用新型试验装置通过溶解氧控制系统控制回路中溶解氧含量，能够长期精确控制溶解氧含量在10ppb以下。1. The test device of the utility model controls the dissolved oxygen content in the loop through the dissolved oxygen control system, and can accurately control the dissolved oxygen content below 10ppb for a long time.
2、本实用新型采用真空除氧组件和惰性气体除氧组件相结合的方式除氧，提高了除氧效率，同时可以大大减少惰性气体的使用量，节约成本。2. The utility model adopts the method of combining the vacuum deoxygenation component and the inert gas deoxygenation component to deoxygenate, which improves the efficiency of deoxygenation, and can greatly reduce the use of inert gas and save costs.
3、本实用新型试验装置可以通过高压计量泵和背压阀来调节高温高压水回路中的压力在0至40MPa之间，温度可以由釜体加热炉控制在室温到800℃之间，可以满足不同试验条件需求。3. The test device of the utility model can adjust the pressure in the high-temperature and high-pressure water circuit between 0 and 40 MPa through the high-pressure metering pump and the back pressure valve, and the temperature can be controlled between room temperature and 800 °C by the kettle body heating furnace, which can meet the Requirements for different test conditions.
4、本实用新型通过一套换热器将大部分高压反应釜内高温出水的热量传递给低温进水，这样既可以减少热量损失，节约能源，又可以使出水温度显著降低，出水再经过冷凝器后降至常温，经过滤器过滤后回到储水桶中自动循环反复利用。4. The utility model transfers the heat of most of the high-temperature outlet water in the high-pressure reactor to the low-temperature inlet water through a set of heat exchangers, which can not only reduce heat loss, save energy, but also significantly reduce the temperature of the outlet water, and then condense the outlet water After being cooled to normal temperature, it will be returned to the water storage bucket after being filtered by the filter, and it will be recycled and reused automatically.
附图说明：Description of drawings:
图1为本实用新型控制氧含量的动态高温高压蒸汽氧化试验装置的结构示意图。Fig. 1 is a structural schematic diagram of a dynamic high-temperature and high-pressure steam oxidation test device for controlling oxygen content of the present invention.
图中：1为高纯水机；2为给水泵；3为储水桶；4为背压阀A；5为单向阀A；6为排污口；7为水位计；8为真空泵；9为压力表A；10为比例电磁阀；11为第二过滤器；12为单向阀B；13为惰性气体气瓶；14为溶解氧控制系统；15为循环泵；16为阀门；17为流通池；18为溶解氧表；19为高压计量泵；20为阻尼器；21为单向阀C；22为换热器；23为釜体加热炉；24为高压反应釜；25为冷凝器；26为压力表B；27为第一过滤器；28为背压阀B；29为泄压阀；30为冷水机。In the figure: 1 is a high-purity water machine; 2 is a water supply pump; 3 is a water storage tank; 4 is a back pressure valve A; 5 is a one-way valve A; 6 is a sewage outlet; 7 is a water level gauge; 8 is a vacuum pump; 9 is a pressure gauge A; 10 is a proportional solenoid valve; 11 is a second filter; 12 is a one-way valve B; 13 is an inert gas cylinder; 14 is a dissolved oxygen control system; 15 is a circulation pump; 16 is a valve; 17 is a flow cell; 18 is a dissolved oxygen meter; 19 is a high-pressure metering pump; 20 is a damper; 21 is a one-way valve C; 22 is a heat exchanger; 23 is a kettle body heating furnace; 24 is a high-pressure reactor; 25 is a condenser; 26 is Pressure gauge B; 27 is the first filter; 28 is the back pressure valve B; 29 is the pressure relief valve; 30 is the chiller.
具体实施方式：detailed description:
下面结合附图对本实用新型做进一步详细说明。Below in conjunction with accompanying drawing, the utility model is described in further detail.
如图1所示，本实用新型一种控制氧含量的动态高温高压蒸汽氧化试验装置，包括给水组件、真空除氧组件、惰性气体除氧组件、常温循环水回路和高温高压水回路。具体安装步骤如下：As shown in Figure 1, the utility model is a dynamic high-temperature and high-pressure steam oxidation test device for controlling oxygen content, including a water supply component, a vacuum deoxygenation component, an inert gas deoxygenation component, a normal temperature circulating water circuit and a high temperature and high pressure water circuit. The specific installation steps are as follows:
所述的给水组件包括高纯水机1、给水泵2、储水桶3，高纯水机1、给水泵2和储水桶3依次连接。The water supply assembly includes a high-purity water machine 1, a water supply pump 2, and a water storage bucket 3, and the high-purity water machine 1, the water supply pump 2, and the water storage bucket 3 are connected in sequence.
真空除氧组件包括真空泵8和压力表A9，且真空泵8通过管路与储水桶3相连通，该管路上设置有压力表A9。The vacuum deoxygenation assembly includes a vacuum pump 8 and a pressure gauge A9, and the vacuum pump 8 is communicated with the water storage tank 3 through a pipeline, and the pipeline is provided with a pressure gauge A9.
在储水桶3顶部设置管路依次通过背压阀A4和单向阀A5与大气相连。在储水桶3底部开设有排污口6，侧面设置有水位计7。A pipeline is arranged on the top of the water storage bucket 3 to be connected to the atmosphere through the back pressure valve A4 and the one-way valve A5 in sequence. A sewage outlet 6 is provided at the bottom of the water storage barrel 3, and a water level gauge 7 is provided on the side.
在储水桶3底部依次通过管路连接的比例电磁阀10、第二过滤器11、单向阀B12、惰性气体气瓶13。The proportional electromagnetic valve 10 , the second filter 11 , the one-way valve B12 and the inert gas cylinder 13 are sequentially connected by pipelines at the bottom of the water storage tank 3 .
通过管路依次连接阀门16、循环泵15、流通池17、溶解氧表18，之后回路回到储水桶3顶部，构成所述常温循环水回路。The valve 16, the circulation pump 15, the flow tank 17, and the dissolved oxygen meter 18 are connected in sequence through pipelines, and then the loop returns to the top of the water storage tank 3 to form the normal temperature circulating water loop.
通过管路连接的高压计量泵19、阻尼器20、单向阀C21、换热器22冷端、釜体加热炉23、高压反应釜24、换热器22热端、冷凝器25、压力表B26、第一过滤器27、背压阀B28，所述冷凝器连接冷水机29。高温高压水回路的连接管路均为金属卡套管。High-pressure metering pump 19, damper 20, check valve C21, cold end of heat exchanger 22, kettle body heating furnace 23, high-pressure reaction kettle 24, hot end of heat exchanger 22, condenser 25, pressure gauge connected by pipelines B26, a first filter 27, a back pressure valve B28, and the condenser is connected to a chiller 29. The connecting pipes of the high temperature and high pressure water circuit are all metal tubes.
在进行高温蒸汽氧化试验时，首先打开给水泵2出口阀门，向储水桶3中加入由高纯水机1制取的高纯水。之后打开真空除氧组件阀门对储水桶3抽真空，可使高纯水中溶解的大部分空气排出，使水中的溶解氧含量降至500ppb左右，之后打开惰性气体除氧组件和常温循环水回路，通过向储水桶3内通入惰性气体如氩气来除氧。所述常温水回路中流通池17内装有溶解氧传感器，传感器的信号通过溶解氧表18整合为4-20mA的电流信号，溶解氧控制系统14根据实测溶解氧值和设定溶解氧值计算出4-20mA控制信号，输出到比例电磁阀10上，控制其开关比例，当实测溶解氧含量高于设定值上限时，比例电磁阀10打开，向储水桶3内通入惰性气体，吹洗储水桶3中的水进行除氧，逸出的气体通过背压阀A4和单向阀A5排入大气。当实测溶解氧含量高于设定值上限时，比例电磁阀10关闭，惰性气体停止吹洗，此时可以开始正常试验。背压阀A4和单向阀A5保证储水桶3处于惰性气体环境下的微正压状态，防止溶解氧再次升高。之后打开高温高压循环水回路，通过调节高压计量泵19和背压阀B28使回路中压力达到试验预期压力参数，之后打开可编程控制的釜体加热炉23升温，将回路中温度升至验预期温度参数，之后开始试验。When carrying out the high-temperature steam oxidation test, the outlet valve of the feed water pump 2 is first opened, and the high-purity water produced by the high-purity water machine 1 is added to the water storage tank 3 . Then open the valve of the vacuum deoxygenation component to evacuate the water storage tank 3, so that most of the air dissolved in the high-purity water can be discharged, and the dissolved oxygen content in the water can be reduced to about 500ppb. Inert gas such as argon is passed into the water storage tank 3 to remove oxygen. Dissolved oxygen sensors are installed in the circulation pool 17 in the normal temperature water circuit, and the signal of the sensor is integrated into a 4-20mA current signal through the dissolved oxygen meter 18, and the dissolved oxygen control system 14 calculates according to the measured dissolved oxygen value and the set dissolved oxygen value The 4-20mA control signal is output to the proportional solenoid valve 10 to control its switching ratio. When the measured dissolved oxygen content is higher than the upper limit of the set value, the proportional solenoid valve 10 is opened, and an inert gas is introduced into the water storage tank 3 for purging. The water in the water storage tank 3 is deoxygenated, and the escaped gas is discharged into the atmosphere through the back pressure valve A4 and the one-way valve A5. When the measured dissolved oxygen content is higher than the upper limit of the set value, the proportional solenoid valve 10 is closed, the inert gas purging is stopped, and the normal test can be started at this time. The back pressure valve A4 and the one-way valve A5 ensure that the water storage tank 3 is in a slightly positive pressure state under an inert gas environment to prevent the dissolved oxygen from rising again. Then open the high-temperature and high-pressure circulating water circuit, and adjust the pressure in the circuit to reach the expected pressure parameter of the test by adjusting the high-pressure metering pump 19 and the back pressure valve B28, and then open the programmable control kettle body heating furnace 23 to raise the temperature, and the temperature in the circuit is raised to the expected test value. temperature parameters, after which the test is started.
本实用新型采用一套换热器22将大部分高压反应釜内高温出水的热量传递给低温进水，这样既可以减少热量损失，节约能源，又可以使出水温度显著降低，使进入冷凝器25的气体温度降低，节约冷水机30所需的电能，之后经过滤器过滤后回到储水罐中循环反复利用。高温高压回路中压力通过高压计量泵19和背压阀B28控制，当试验过程中超压时，可通过泄压阀29泄压，保证安全。试验过程中惰性气体除氧组件一直处于开启状态，保证回路中溶解氧含量始终控制在设定溶解氧范围内，由于整个实验装置保持正压和密封状态，可大大降低除氧用惰性气体的消耗。The utility model adopts a set of heat exchanger 22 to transfer the heat of most of the high-temperature outlet water in the high-pressure reactor to the low-temperature inlet water, which can not only reduce heat loss, save energy, but also significantly reduce the temperature of the outlet water, so that the water entering the condenser 25 The temperature of the gas is reduced, saving the electric energy required by the chiller 30, and then returning to the water storage tank after being filtered by the filter for recycling and repeated use. The pressure in the high-temperature and high-pressure circuit is controlled by the high-pressure metering pump 19 and the back pressure valve B28. When there is overpressure during the test, the pressure can be released through the pressure relief valve 29 to ensure safety. During the test, the inert gas deoxygenation component is always in the open state to ensure that the dissolved oxygen content in the circuit is always controlled within the set dissolved oxygen range. Since the entire experimental device is kept in a positive pressure and sealed state, the consumption of inert gas for deoxygenation can be greatly reduced .
本实用新型控制氧含量的动态高温高压蒸汽氧化试验装置的使用方法，包括如下步骤：The usage method of the dynamic high-temperature and high-pressure steam oxidation test device for controlling the oxygen content of the present invention comprises the following steps:
1)首先打开给水泵2出口阀门，向储水桶3中加入由高纯水机1制取的高纯水；1) First open the outlet valve of the feed water pump 2, and add high-purity water produced by the high-purity water machine 1 into the water storage tank 3;
2)打开真空除氧组件阀门对储水桶3抽真空；2) Open the valve of the vacuum deaeration component to evacuate the water storage tank 3;
3)打开惰性气体除氧组件和常温循环水回路，当溶解氧表18测得溶解氧含量高于设定值上限时，比例电磁阀10打开，惰性气体吹洗储水桶3中的水进行除氧，逸出的气体通过背压阀A4和单向阀A5排入大气，当溶解氧表18测得溶解氧含量高于设定值上限时，比例电磁阀10关闭，惰性气体停止吹洗；3) Open the inert gas deoxygenation component and the normal temperature circulating water circuit. When the dissolved oxygen meter 18 measures that the dissolved oxygen content is higher than the upper limit of the set value, the proportional solenoid valve 10 is opened, and the inert gas flushes the water in the water storage tank 3 to remove Oxygen, the escaped gas is discharged into the atmosphere through the back pressure valve A4 and the one-way valve A5. When the dissolved oxygen meter 18 measures that the dissolved oxygen content is higher than the upper limit of the set value, the proportional solenoid valve 10 is closed, and the inert gas stops purging;
4)打开高温高压循环水回路，通过调节高压计量泵19和背压阀B28使回路中压力达到试验预期压力参数；4) Open the high-temperature and high-pressure circulating water circuit, and make the pressure in the circuit reach the expected pressure parameter of the test by adjusting the high-pressure metering pump 19 and the back pressure valve B28;
5)打开可编程控制的釜体加热炉23升温，将回路中温度升至验预期温度参数，开始试验。5) Turn on the programmable control kettle body heating furnace 23 to raise the temperature, raise the temperature in the loop to the expected temperature parameter, and start the test.
本实用新型试验装置的使用方法试验顺序安排合理，具体来说，本实用新型使用方法的有益效果在于：The use method test sequence arrangement of the utility model test device is reasonable, specifically, the beneficial effects of the utility model use method are:
1、先通过真空除氧组件中的真空泵对储水桶抽真空，去除大量水中的溶解氧，随后再利用惰性气体进一步除氧，可以提高除氧效率，同时可以大大减少惰性气体的使用量，节约试验成本。1. First, the vacuum pump in the vacuum deoxygenation component vacuumizes the water storage tank to remove dissolved oxygen in a large amount of water, and then uses inert gas to further deoxygenate, which can improve the efficiency of deoxygenation, and can greatly reduce the use of inert gas. test cost.
2、先将高压釜压力升至试验预期温度参数，将调节背压阀B设置为试验预期压力参数，最后打开高压计量泵向高压反应釜中通入水，可使高压反应釜中的压力逐步增大到预期压力参数，更加安全可靠。2. First raise the pressure of the autoclave to the expected temperature parameter of the test, set the adjustable back pressure valve B to the expected pressure parameter of the test, and finally turn on the high-pressure metering pump to feed water into the high-pressure reactor to gradually increase the pressure in the high-pressure reactor Larger than expected pressure parameters, more safe and reliable.
综上所述，本实用新型设计巧妙，与现有技术对比，本实用新型能够实现在高温高压条件下动态蒸汽氧化试验，且能够实时监测和精确控制溶解氧含量，溶解氧含量可长期控制在10ppb以下，同时除氧效率高，蒸汽氧化试验过程中系统能够自动运行，无需看守，节约人力物力。To sum up, the design of the utility model is ingenious. Compared with the prior art, the utility model can realize the dynamic steam oxidation test under the condition of high temperature and high pressure, and can monitor and accurately control the dissolved oxygen content in real time, and the dissolved oxygen content can be controlled at Below 10ppb, at the same time, the deoxygenation efficiency is high, and the system can run automatically during the steam oxidation test without guards, saving manpower and material resources.
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| CN108195688A (en) * | 2018-02-26 | 2018-06-22 | 华能国际电力股份有限公司 | Internal pressure creep test device and method for simulating service environment of boiler pipe of coal-fired power plant |
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| CN106708111A (en) * | 2016-12-29 | 2017-05-24 | 华能国际电力股份有限公司 | Dynamic high-temperature high-pressure steam oxidation test device for controlling oxygen content and use method |
| CN108195688A (en) * | 2018-02-26 | 2018-06-22 | 华能国际电力股份有限公司 | Internal pressure creep test device and method for simulating service environment of boiler pipe of coal-fired power plant |
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