WO2023185087A1 - 循环冷却水酚酞碱度和总碱度在线测量装置及方法 - Google Patents

循环冷却水酚酞碱度和总碱度在线测量装置及方法 Download PDF

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WO2023185087A1
WO2023185087A1 PCT/CN2022/137982 CN2022137982W WO2023185087A1 WO 2023185087 A1 WO2023185087 A1 WO 2023185087A1 CN 2022137982 W CN2022137982 W CN 2022137982W WO 2023185087 A1 WO2023185087 A1 WO 2023185087A1
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alkalinity
circulating cooling
cooling water
indicator
reaction tank
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French (fr)
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黄善锋
谢宙桦
黄万启
张洪博
韩霜
张芬
陈晶
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Xian Thermal Power Research Institute Co Ltd
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Xian Thermal Power Research Institute Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/79—Photometric titration
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration

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  • This application relates to the technical field of online measurement of industrial circulating cooling water quality, and in particular to an online measuring device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water.
  • controlling the phenolphthalein alkalinity and total alkalinity of circulating cooling water within a reasonable range is the best way to prevent circulating cooling.
  • some circulating cooling water systems add too much acidic substances to remove alkalinity, causing corrosion of system materials.
  • Controlling the alkalinity of circulating cooling water is an effective way to avoid corrosion caused by excessive addition of acid. Therefore, timely monitoring and control of phenolphthalein alkalinity and total alkalinity in circulating cooling water is of great significance to prevent scaling and corrosion of the circulating cooling water system.
  • manual detection methods are used to monitor phenolphthalein alkalinity and total alkalinity in industrial circulating cooling water systems. Although this method is relatively mature, it requires testing personnel, increases operating labor costs, and is cumbersome to operate; and the testing intervals are long, the monitoring of phenolphthalein alkalinity and total alkalinity content in circulating cooling water is not timely, and operation control lags behind, which can easily lead to The carbonate in the circulating cooling water precipitates and forms scale.
  • manual detection and monitoring methods have a large impact of human factors and are difficult to apply to automatic control or intelligent operation, causing potential production safety hazards and making it impossible to find the root cause of system scaling.
  • this application provides an online measuring device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water.
  • the device can measure the phenolphthalein alkalinity and total alkalinity content of circulating cooling water in real time online without manual labor.
  • the intervention ensures timely monitoring of the phenolphthalein alkalinity and total alkalinity content of the circulating cooling water, provides timely control reference for operation, and prevents scaling or corrosion of the circulating cooling water.
  • An online measuring device for phenolphthalein alkalinity and total alkalinity of circulating cooling water including a reaction unit, a control and a detection unit;
  • the reaction unit includes a first indicator reagent bottle, a first indicator plunger pump, a second indicator reagent bottle, a second indicator plunger pump, a standard liquid reagent bottle, a standard liquid peristaltic pump, a water inlet solenoid valve and Flow-through reaction tank; the first indicator reagent bottle, the second indicator reagent bottle and the standard solution reagent bottle are respectively connected to different liquid inlets on the top of the flow-through reaction tank through pipelines;
  • the water inlet solenoid valve is located on the water sample inlet pipe of the circulation reaction tank; a first indicator plunger pump is provided on the pipeline of the first indicator reagent bottle, and a second indicator plunger pump is provided on the pipeline of the second indicator reagent bottle.
  • Indicator plunger pump; standard solution peristaltic pump is located on the pipeline of the standard solution reagent bottle;
  • the control and detection unit includes a controller, a light source and a light sensor; the light source and the light sensor are located on opposite side walls of the flow reaction cell; the light source and the light sensor are both electrically connected to the controller;
  • the first indicator plunger pump, the second indicator plunger pump, the standard liquid peristaltic pump and the water inlet solenoid valve are all electrically connected to the controller.
  • the water sample outlet of the flow reaction cell is located at the upper part, and the water sample outlet is above the installation position of the light source and light sensor.
  • the flow reaction cell is a transparent cylindrical container, with light sources and light sensors embedded in the relative positions of the middle of its side wall.
  • a magnetic stirrer is provided at the bottom of the flow reaction tank.
  • a measurement method of an online measuring device for phenolphthalein alkalinity and total alkalinity of circulating cooling water including the following steps:
  • the second indicator plunger pump adds the second indicator into the flow reaction tank.
  • the standard solution peristaltic pump drops the standard solution into the flow reaction tank.
  • the light sensor detects the color of the measured water sample in the flow reaction tank. , when the color of the measured water sample changes from blue-green to red, it is the second titration end point.
  • the total alkalinity of the circulating cooling water is calculated based on the total volume of the standard solution added by the peristaltic pump of the standard solution at this time.
  • the phenolphthalein alkalinity in the circulating cooling water is calculated based on the total volume of the standard solution added dropwise by the peristaltic pump of the standard solution at the first titration end point.
  • the specific method is:
  • c 1 is the real-time concentration of phenolphthalein alkalinity in the circulating cooling water; A 1 is the characteristic coefficient; V 1 is the total volume of the standard solution added at the first titration end point; b 1 is the correction value.
  • the total alkalinity of the circulating cooling water is calculated based on the total volume of the standard liquid added dropwise by the standard liquid peristaltic pump at this time.
  • the specific method is:
  • c 2 is the real-time concentration of total alkalinity in the circulating cooling water; A 2 is the characteristic coefficient; V 2 is the total volume of the standard solution added at the second titration end point; b 2 is the correction value.
  • the measurement method of the measurement device can realize simultaneous online real-time measurement of phenolphthalein alkalinity and total alkalinity of circulating cooling water.
  • the device of this application realizes automatic online collection of circulating cooling water. It is simple and practical and has high accuracy in measuring the phenolphthalein alkalinity and total alkalinity of circulating cooling water. It can quickly obtain the phenolphthalein alkalinity and total alkalinity of circulating cooling water and meet the needs of industrial circulating cooling water. monitoring tasks. Compared with the current manual measurement of phenolphthalein alkalinity and total alkalinity of circulating cooling water, the online measurement of phenolphthalein alkalinity and total alkalinity of circulating cooling water can be realized quickly and accurately, reducing the errors introduced by manual measurement and solving the problem of phenolphthalein alkalinity of circulating cooling water. Problems such as untimely monitoring of alkalinity and total alkalinity and heavy workload are conducive to the automatic control or intelligent operation of the circulating cooling water system.
  • the measurement method of the invention is used to correlate the phenolphthalein alkalinity and total alkalinity of circulating cooling water with the standard liquid volume dropped into the flow reaction tank, thereby improving the speed and accuracy of measuring the phenolphthalein alkalinity and total alkalinity of circulating cooling water. At the same time, the workload of operating personnel is reduced and the safety of industrial circulating cooling water operation is improved.
  • Figure 1 Online measurement device for phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water
  • Figure 2 Flowchart of the online measurement method for phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water.
  • First indicator reagent bottle 2. First indicator plunger pump; 3. Second indicator reagent bottle; 4. Second indicator plunger pump; 5. Standard solution reagent bottle; 6. Standard Liquid peristaltic pump; 7. Water inlet solenoid valve; 8. Magnetic stirrer; 9. Flow reaction tank; 10. Controller; 11. Light source; 12. Light sensor.
  • an online measuring device for phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water in this application includes a reaction unit, a control unit and a detection unit.
  • the reaction unit includes a first indicator reagent bottle 1, a first indicator plunger pump 2, a second indicator reagent bottle 3, a second indicator plunger pump 4, a standard solution reagent bottle 5, a standard solution peristaltic pump 6, Water inlet solenoid valve 7, magnetic stirrer 8, flow reaction tank 9; the first indicator reagent bottle 1, the second indicator reagent bottle 3 and the standard solution reagent bottle 5 are connected to the top of the flow reaction tank 9 through different pipelines.
  • the first indicator plunger pump 2 is set on the pipeline of the first indicator reagent bottle 1
  • the second indicator plunger pump 4 is set on the pipeline of the second indicator reagent bottle 3
  • the standard liquid peristaltic pump 6 is set On the pipeline of the standard solution reagent bottle 5
  • the water inlet solenoid valve 7 is provided on the water sample inlet pipe of the flow reaction tank 9, and a magnetic stirrer 8 is provided at the bottom of the flow reaction tank 9.
  • the control and detection unit includes a controller 10, a light source 11 and a light sensor 12.
  • the light source 11 and the light sensor 12 are arranged at opposite positions in the middle of the flow reaction cell 9; the light source 11 and the light sensor 12 are both electrically connected to the controller 10;
  • the first indicator plunger pump 2 , the second indicator plunger pump 4 , the standard liquid peristaltic pump 6 , the water inlet solenoid valve 7 and the magnetic stirrer 8 are each electrically connected to the controller 10 .
  • the water inlet solenoid valve 7 controls the water sample to enter the flow reaction tank 9; the first indicator plunger pump 2 quantitatively adds the first indicator into the flow reaction tank 9; turns on the magnetic stirring Under the stirring of device 8, the standard solution peristaltic pump 6 drops the standard solution 5 into the flow reaction tank 9.
  • the light sensor 12 detects that the color of the measured water sample in the flow reaction tank changes from red to colorless, it is the first titration. end.
  • the second indicator plunger pump 4 quantitatively adds the second indicator into the flow reaction tank 9.
  • the standard solution peristaltic pump 6 continues to drip the standard solution into the flow reaction tank 9.
  • the light sensor 12 The second titration end point is detected when the color of the measured water sample in the flow reaction cell changes from blue-green to red.
  • the controller 10 controls the production water solenoid valve 7, the first indicator plunger pump 2, the second indicator plunger pump 4 and the standard liquid peristaltic pump 6 to open or close, controls the light source 11 to open or close, and the light sensor 12 obtains The data signal is fed back to the controller 10.
  • the flow reaction cell 9 is made of columnar transparent material, and the light source 11 and the light sensor 12 are respectively embedded in the relative positions in the middle of its side wall.
  • the pipe ends corresponding to the outlets of the first indicator plunger pump 2, the second indicator plunger pump 4 and the standard solution peristaltic pump 6 are respectively connected to the respective liquid inlets at the top of the flow reaction tank 9, and the water sample outlet is higher than the light source 11 and the installation location of the light sensor 12.
  • the light source 11, light sensor 12, water inlet solenoid valve 7, first indicator plunger pump 2, second indicator plunger pump 4 and magnetic stirrer 8 are electrically connected to the controller 10 respectively.
  • the measurement method based on the above-mentioned industrial circulating cooling water phenolphthalein alkalinity and total alkalinity online measurement device includes the following steps:
  • This device uses the first indicator plunger pump to add the first indicator into the flow reaction tank.
  • the standard liquid droplets are added into the flow reaction tank through the standard liquid peristaltic pump.
  • the light sensor detects the flow
  • the color of the measured water sample in the reaction tank changes from red to colorless, which is the first titration end point.
  • the real-time concentration of phenolphthalein alkalinity in the circulating cooling water is calculated based on the total volume of the standard solution dropped at the first titration end point.
  • the second indicator plunger pump quantitatively adds the second indicator into the flow reaction tank.
  • the standard solution peristaltic pump continues to drip the standard solution into the flow reaction tank.
  • the light sensor detects that the flow reaction tank is When the color of the measured water sample changes from blue-green to red, it is the second titration end point.
  • the real-time concentration of the total alkalinity in the circulating cooling water is calculated based on the total volume of the standard solution dropped at the second titration end point.
  • the method of the present application can conveniently realize the simultaneous online measurement of phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water without manual intervention.
  • a circulating cooling water measuring water pipe is installed at the inlet of the water inlet solenoid valve 7 to ensure that the water pressure in the measuring pipe is about 0.1Mpa, so that the measured water sample can flow into the flow reaction tank 9 for measurement.
  • the water inlet solenoid valve 7 opens and the flow reaction tank 9 is flushed.
  • the first indicator plunger pump 2 will An indicator is quantitatively added to the flow reaction tank 9; under stirring, the magnetic stirrer 8 is turned on, and the standard solution peristaltic pump 6 drops the standard solution 5 into the flow reaction tank 9.
  • the light sensor 12 detects the measured water sample in the flow reaction tank
  • the first titration end point is when the color changes from red to colorless.
  • the second indicator plunger pump 4 quantitatively adds the second indicator into the flow reaction tank 9.
  • the standard solution peristaltic pump 6 continues to drip the standard solution into the flow reaction tank 9.
  • the light sensor 12 The second titration end point is detected when the color of the measured water sample in the flow reaction cell changes from blue-green to red.
  • the water inlet solenoid valve 7 is opened, and the flow reaction tank 9 is flushed for 30 seconds. After ensuring that the measured water sample has flushed the flow reaction tank 9 and filled the flow reaction tank 9, the water inlet solenoid valve 7 is closed. .
  • c 1 is the real-time concentration of phenolphthalein alkalinity in the circulating cooling water; A 1 is the characteristic coefficient; V 1 is the total volume of the standard solution added at the first titration end point; b 1 is the correction value.
  • c 2 is the real-time concentration of total alkalinity in the circulating cooling water; A 2 is the characteristic coefficient; V 2 is the total volume of the standard solution added at the second titration end point; b 2 is the correction value.
  • the device of the present application has a simple structure and can realize an automated measurement process.
  • the method of the present application can conveniently realize the simultaneous online measurement of phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water without manual intervention.

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Abstract

本申请公开了一种循环冷却水酚酞碱度和总碱度在线测量装置及方法，装置包括反应单元、控制及检测单元。反应单元包括第一指示剂试剂瓶、第一指示剂柱塞泵、第二指示剂试剂瓶、第二指示剂柱塞泵、标准液试剂瓶、标准液蠕动泵、进水电磁阀、磁力搅拌器、流通反应池；第一指示剂柱塞泵、第二指示剂柱塞泵和标准液蠕动泵的各自出口分别通过管路与流通反应池顶部不同的进液口连接。控制及检测单元包括控制器、光源和光感应器；控制器分别与光源、光感应器、进水电磁阀、磁力搅拌器、第一指示剂柱塞泵、第二指示剂柱塞泵和标准液蠕动泵电连接。本申请方法可以在无需人工干预的情况下，便捷地实现工业循环冷却水酚酞碱度和总碱度的同时在线测量。

Description

循环冷却水酚酞碱度和总碱度在线测量装置及方法
相关申请的交叉引用
本申请要求在2022年3月30日提交中国国家知识产权局、申请号为202210325942.1、发明名称为“循环冷却水酚酞碱度和总碱度在线测量装置及方法”的中国专利申请的优先权，其全部内容通过引用的方式并入本文中。
技术领域
本申请涉及工业循环冷却水水质在线测量技术领域，特别是涉及一种循环冷却水酚酞碱度和总碱度在线测量装置及方法。
背景技术
在工业生产中，设备、物料或介质的冷却主要是通过工业循环冷却水冷却。随着温度升高、散热蒸发，工业循环冷却水不断浓缩容易发生结垢，一旦结垢轻则影响设备运行，重则设备报废或停产检修。其中碳酸钙、碳酸镁垢是循环冷却水系统最常见的结垢种类，其主要原因是循环冷却水中碳酸盐和重碳酸盐的浓度超出了其析出浓度，导致析出成垢。而一般循环冷却水中酚酞碱度和总碱度的组成绝大部分是碳酸盐和重碳酸盐，因此将循环冷却水的酚酞碱度和总碱度控制合理的范围下，是预防循环冷却水结碳酸盐垢的最有效方法。另外，有些循环冷却水系统为避免碳酸盐结垢，加入过多的酸性物质去除碱度，导致系统材质发生腐蚀，控制好循环冷却水的碱度是避免加酸过量导致腐蚀的有效方法。因此循环冷却水中酚酞碱度和总碱度的及时监测与控制，对防止循环冷却水系统结垢和腐蚀具有很大的意义。
目前工业循环冷却水系统中酚酞碱度和总碱度大多采用手工检测的监测方法。这种方法虽然较成熟，但需配备检测人员，增加运行劳动力成本，操作繁琐；且检验间隔大，对循环冷却水中酚酞碱度和总碱度含量的监测不及时，运行控制滞后，很容易导致循环冷却水中的碳酸盐析出成垢。此外，手工检测监测法的人为因素影响大，难以适用于自动控制或智慧化运行，形 成生产安全隐患，找不出系统结垢的根本原因。
发明内容
为了克服上述现有技术的不足，本申请提供一种循环冷却水酚酞碱度和总碱度在线测量装置及方法，该装置可以在线实时测量循环冷却水中酚酞碱度和总碱度含量，无需人工干预，保证了循环冷却水酚酞碱度和总碱度含量及时监测，为运行及时提供控制参考，起到防止循环冷却水结垢或腐蚀的作用。
为了达到以上目的，本申请采用以下技术方案：
一种循环冷却水酚酞碱度和总碱度在线测量装置，包括反应单元、控制及检测单元；
所述反应单元包括第一指示剂试剂瓶、第一指示剂柱塞泵、第二指示剂试剂瓶、第二指示剂柱塞泵、标准液试剂瓶、标准液蠕动泵、进水电磁阀和流通反应池；所述第一指示剂试剂瓶、第二指示剂试剂瓶和标准液试剂瓶分别通过管路与流通反应池顶部不同的进液口连接；
所述进水电磁阀设在流通反应池的水样入口管上；第一指示剂试剂瓶的管路上设有第一指示剂柱塞泵，第二指示剂试剂瓶的管路上设有第二指示剂柱塞泵；标准液蠕动泵设在标准液试剂瓶的管路上；
所述控制及检测单元包括控制器、光源和光感应器；光源和光感应器设在流通反应池上相对侧壁上；光源和光感应器均电连接至控制器；
所述第一指示剂柱塞泵、第二指示剂柱塞泵、标准液蠕动泵和进水电磁阀均与控制器电连接。
作为本申请的进一步改进，所述流通反应池的水样出口设在上部，且水样出口在光源和光感应器的安装位置之上。
作为本申请的进一步改进，所述流通反应池为材质透明柱状容器，其侧壁中部的相对位置分别嵌入光源和光感应器。
作为本申请的进一步改进，所述流通反应池底部设有磁力搅拌器。
一种循环冷却水酚酞碱度和总碱度在线测量装置的测量方法，包括以下步骤：
打开进水电磁阀，水样冲洗并充足流通反应池后，向流通反应池内加入 第一指示剂；再由标准液蠕动泵向流通反应池中滴加标准液，通过光感应器检测流通反应池内被测水样的颜色变化，当被测水样的颜色从红色变成无色时即为第一滴定终点，根据第一滴定终点时标准液蠕动泵所滴加入标准液总体积计算出循环冷却水中酚酞碱度；
第二指示剂柱塞泵向流通反应池内加入第二指示剂，搅拌反应10s后，由标准液蠕动泵向流通反应池中滴加标准液，光感应器检测流通反应池内被测水样的颜色，当被测水样的颜色从蓝绿色变成红色时即为第二滴定终点，根据此时标准液蠕动泵所滴加入标准液总体积计算出循环冷却水中总碱度。
作为本申请的进一步改进，根据第一滴定终点时标准液蠕动泵所滴加入标准液总体积计算出循环冷却水中酚酞碱度，具体方法为：
c 1＝A 1·V 1+b 1
c 1为循环冷却水中酚酞碱度的实时浓度；A 1为特征系数；V 1为第一滴定终点时加入标准液总体积；b 1为修正值。
作为本申请的进一步改进，根据此时标准液蠕动泵所滴加入标准液总体积计算出循环冷却水中总碱度，具体方法为：
C 2＝A 2·V 2+b 2
c 2为循环冷却水中总碱度的实时浓度；A 2为特征系数；V 2为第二滴定终点时加入标准液总体积；b 2为修正值。
作为本申请的进一步改进，所述测量装置的测量方法可实现循环冷却水酚酞碱度和总碱度的同时在线实时测量。
和现有技术相比较，本申请具备如下优点：
本申请装置将循环冷却水实现自动在线采集，简单实用且测量循环冷却水酚酞碱度和总碱度准确度高，能够快速获得循环冷却水的酚酞碱度和总碱度，满足工业循环冷却水的监测任务。相比目前循环冷却水酚酞碱度和总碱度的人工测量，能够快速准确地实现循环冷却水酚酞碱度和总碱度的在线测量，减少人工测量引入的误差，解决了循环冷却水酚酞碱度和总碱度监测不及时、工作量大等问题，有利于循环冷却水系统的自动控制或智慧化运行。
采用该发明测量方法将循环冷却水酚酞碱度和总碱度分别与滴加入流通反应池内的标准液量进行关联，提高了循环冷却水酚酞碱度和总碱度测量的快速性和准确性，同时减少了运行人员的工作量，提高了工业循环冷却水 运行的安全性。
附图说明
图1工业循环冷却水酚酞碱度和总碱度在线测量装置；
图2工业循环冷却水酚酞碱度和总碱度在线测量方法流程图。
其中，1、第一指示剂试剂瓶；2、第一指示剂柱塞泵；3、第二指示剂试剂瓶；4、第二指示剂柱塞泵；5、标准液试剂瓶；6、标准液蠕动泵；7、进水电磁阀；8、磁力搅拌器；9、流通反应池；10、控制器；11、光源；12光感应器。
具体实施方式
下面结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请的保护范围。
如图1所示，本申请的一种工业循环冷却水酚酞碱度和总碱度在线测量装置，包括反应单元、控制及检测单元。
其中反应单元包括第一指示剂试剂瓶1、第一指示剂柱塞泵2、第二指示剂试剂瓶3、第二指示剂柱塞泵4、标准液试剂瓶5、标准液蠕动泵6、进水电磁阀7、磁力搅拌器8、流通反应池9；第一指示剂试剂瓶1、第二指示剂试剂瓶3和标准液试剂瓶5分别通过管路与流通反应池9顶部不同的进液口连接；第一指示剂试剂瓶1的管路上设置第一指示剂柱塞泵2，第二指示剂试剂瓶3的管路上设置第二指示剂柱塞泵4；标准液蠕动泵6设在标准液试剂瓶5的管路上；进水电磁阀7设在流通反应池9的水样入口管上，流通反应池9的底部设有磁力搅拌器8。
控制及检测单元包括控制器10、光源11和光感应器12。光源11和光感应器12设置在流通反应池9中部相对的位置上；光源11和光感应器12均电连接至控制器10；
所述第一指示剂柱塞泵2、第二指示剂柱塞泵4、标准液蠕动泵6、进水电磁阀7和磁力搅拌器8均各自电连接至控制器10。
基于上述测量装置，其具体工作过程为：进水电磁阀7控制水样进入流通反应池9中；第一指示剂柱塞泵2将第一指示剂定量加入流通反应池9中；打开磁力搅拌器8搅拌下，标准液蠕动泵6向流通反应池9中滴加标准液5，当光感应器12检测到流通反应池内被测水样的颜色从红色变成无色时即为第一滴定终点。
再由第二指示剂柱塞泵4向流通反应池9内定量加入第二指示剂，搅拌反应下，由标准液蠕动泵6继续向流通反应池9中滴加标准液，当光感应器12检测到流通反应池内被测水样的颜色从蓝绿色变成红色时即为第二滴定终点。
控制器10控制采进水电磁阀7、第一指示剂柱塞泵2、第二指示剂柱塞泵4和标准液蠕动泵6开启或关闭，控制光源11开启或关闭，光感应器12获取数据信号反馈给控制器10。
作为可选的实施例，流通反应池9为柱状透明材质，其侧壁中部的相对位置分别嵌入光源11和光感应器12。
第一指示剂柱塞泵2、第二指示剂柱塞泵4和标准液蠕动泵6出口对应的管路末端分别接至流通反应池9顶部各自的进液口，且水样出口高于光源11和光感应器12的安装位置。
控制过程中，所述的光源11、光感应器12、进水电磁阀7、第一指示剂柱塞泵2、第二指示剂柱塞泵4和磁力搅拌器8分别电连接至控制器10。
参照图2，基于上述工业循环冷却水酚酞碱度和总碱度在线测量装置的测量方法，包括以下步骤：
本装置使用第一指示剂柱塞泵向流通反应池内加入第一指示剂，经混合后，通过标准液蠕动泵将标准液滴加入流通反应池中，混合反应后，当光感应器检测到流通反应池内被测水样的颜色从红色变成无色即为第一滴定终点，根据第一滴定终点时所滴加标准液的总体积计算出循环冷却水中酚酞碱度的实时浓度。再由第二指示剂柱塞泵向流通反应池内定量加入第二指示剂，搅拌反应后，由标准液蠕动泵继续向流通反应池中滴加标准液，当光感应器检测到流通反应池内被测水样的颜色从蓝绿色变成红色时即为第二滴定终点，根据第二滴定终点时所滴加标准液的总体积计算出循环冷却水中总碱度的实时浓度。
本申请方法可以在无需人工干预的情况下，便捷地实现工业循环冷却水酚酞碱度和总碱度的同时在线测量。
下面结合附图1和附图2对本申请的具体实施方式作进一步的说明。
实施例
如附图1所示，进水电磁阀7入口处安装循环冷却水测量水管，保证测量管内水压约为0.1Mpa，便于被测水样流入流通反应池9内进行测量。
如附图2所示，当控制器10发出测量指令时，进水电磁阀7打开，冲洗流通反应池9，保证流通反应池9内水样充足后，第一指示剂柱塞泵2将第一指示剂定量加入流通反应池9中；打开磁力搅拌器8搅拌下，标准液蠕动泵6向流通反应池9中滴加标准液5，当光感应器12检测到流通反应池内被测水样的颜色从红色变成无色时即为第一滴定终点。
再由第二指示剂柱塞泵4向流通反应池9内定量加入第二指示剂，搅拌反应下，由标准液蠕动泵6继续向流通反应池9中滴加标准液，当光感应器12检测到流通反应池内被测水样的颜色从蓝绿色变成红色时即为第二滴定终点。
为了更详细的描述，本申请具体步骤为：
在控制器10发出测量指令后，进水电磁阀7打开，冲洗30s流通反应池9，确保被测水样将流通反应池9冲洗干净，并充满流通反应池9后，关闭进水电磁阀7。
开启磁力搅拌器8下，启动第一指示剂柱塞泵2往流通反应池9中加入0.2mL第一指示剂1。
搅拌10s后，开启标准液蠕动泵6往流通反应池9中滴加标准液5，同时开启光源11和光感应器12监测流通反应池9中被测水样的颜色变化，当被测水样的颜色从红色变成无色时即为第一滴定终点，根据第一滴定终点时标准液蠕动泵所滴加入标准液体积计算出循环冷却水中酚酞碱度，具体方法为：
c 1＝A 1·V 1+b 1
c 1为循环冷却水中酚酞碱度的实时浓度；A 1为特征系数；V 1为第一滴定终点时加入标准液总体积；b 1为修正值。
再控制第二指示剂柱塞泵4向流通反应池9内定量加入第二指示剂，搅 拌反应10s后，由标准液蠕动泵6继续向流通反应池9中滴加标准液，当光感应器12检测到流通反应池内被测水样的颜色从蓝绿色变成红色时即为第二滴定终点，根据第二滴定终点时标准液蠕动泵所滴加入标准液总体积V 2计算出循环冷却水中总碱度，具体方法为：
c 2＝A 2·V 2+b 2
c 2为循环冷却水中总碱度的实时浓度；A 2为特征系数；V 2为第二滴定终点时加入标准液总体积；b 2为修正值。
计算出总碱度结果后，打开进水电磁阀7，冲洗30s，保证将刚被测水样排出流通反应池9后，关闭进水电磁阀7，完成此次酚酞碱度和总碱度的在线测量。
综上所述，本申请装置结构简单，可以实现自动化测量过程，本申请方法可以在无需人工干预的情况下，便捷地实现工业循环冷却水酚酞碱度和总碱度的同时在线测量。
以上所述，仅为本申请较佳的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请披露的技术范围内，可轻易想到的变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应该以权利要求书的保护范围为准。

Claims (8)

  1. 循环冷却水酚酞碱度和总碱度在线测量装置，其特征在于，包括反应单元、控制及检测单元；
    所述反应单元包括第一指示剂试剂瓶(1)、第一指示剂柱塞泵(2)、第二指示剂试剂瓶(3)、第二指示剂柱塞泵(4)、标准液试剂瓶(5)、标准液蠕动泵(6)、进水电磁阀(7)和流通反应池(9)；所述第一指示剂试剂瓶(1)、第二指示剂试剂瓶(3)和标准液试剂瓶(5)分别通过管路与流通反应池(9)顶部不同的进液口连接；
    所述进水电磁阀(7)设在流通反应池(9)的水样入口管上；第一指示剂试剂瓶(1)的管路上设有第一指示剂柱塞泵(2)，第二指示剂试剂瓶(3)的管路上设有第二指示剂柱塞泵(4)；标准液蠕动泵(6)设在标准液试剂瓶(5)的管路上；
    所述控制及检测单元包括控制器(10)、光源(11)和光感应器(12)；光源(11)和光感应器(12)设在流通反应池(9)上相对侧壁上；光源(11)和光感应器(12)均电连接至控制器(10)；
    所述第一指示剂柱塞泵(2)、第二指示剂柱塞泵(4)、标准液蠕动泵(6)和进水电磁阀(7)均与控制器(10)电连接。
  2. 根据权利要求1所述的循环冷却水酚酞碱度和总碱度在线测量装置，其特征在于，所述流通反应池(9)的水样出口设在上部，且水样出口在光源(11)和光感应器(12)的安装位置之上。
  3. 根据权利要求1所述的循环冷却水酚酞碱度和总碱度在线测量装置，其特征在于，所述流通反应池(9)为材质透明柱状容器，其侧壁中部的相对位置分别嵌入光源(11)和光感应器(12)。
  4. 根据权利要求1所述的循环冷却水酚酞碱度和总碱度在线测量装置，其特征在于，所述流通反应池(9)底部设有磁力搅拌器(8)。
  5. 根据权利要求1至4中任一项所述的循环冷却水酚酞碱度和总碱度在 线测量装置的测量方法，其特征在于，包括以下步骤：
    打开进水电磁阀(7)，水样冲洗并充足流通反应池(9)后，向流通反应池(9)内加入第一指示剂；再由标准液蠕动泵(6)向流通反应池(9)中滴加标准液，通过光感应器(12)检测流通反应池内被测水样的颜色变化，当被测水样的颜色从红色变成无色时即为第一滴定终点，根据第一滴定终点时标准液蠕动泵所滴加入标准液总体积计算出循环冷却水中酚酞碱度；
    第二指示剂柱塞泵(4)向流通反应池(9)内加入第二指示剂，搅拌后，由标准液蠕动泵(6)向流通反应池(9)中滴加标准液，光感应器(12)检测流通反应池内被测水样的颜色，当被测水样的颜色从蓝绿色变成红色时即为第二滴定终点，根据此时标准液蠕动泵所滴加入标准液总体积计算出循环冷却水中总碱度。
  6. 根据权利要求5所述的循环冷却水酚酞碱度和总碱度在线测量装置的测量方法，其特征在于，根据第一滴定终点时标准液蠕动泵所滴加入标准液总体积(V 1)计算出循环冷却水中酚酞碱度，具体方法为：
    c 1＝A 1·V 1+b 1
    c 1为循环冷却水中酚酞碱度的实时浓度；A 1为特征系数；V 1为第一滴定终点时加入标准液总体积；b 1为修正值。
  7. 根据权利要求5所述的循环冷却水酚酞碱度和总碱度在线测量装置的测量方法，其特征在于，根据此时标准液蠕动泵所滴加入标准液总体积(V 2)计算出循环冷却水中总碱度，具体方法为：
    C 2＝A 2·V 2+b 2
    c 2为循环冷却水中总碱度的实时浓度；A 2为特征系数；V 2为第二滴定终点时加入标准液总体积；b 2为修正值。
  8. 根据权利要求5所述的循环冷却水酚酞碱度和总碱度在线测量装置的测量方法，其特征在于，所述测量装置的测量方法可实现循环冷却水酚酞碱度和总碱度的同时在线实时测量。
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CN113671112A (zh) * 2021-08-30 2021-11-19 西安热工研究院有限公司 一种工业循环水硬度在线测量装置及测量方法
CN114689577A (zh) * 2022-03-30 2022-07-01 西安热工研究院有限公司 循环冷却水酚酞碱度和总碱度在线测量装置及方法

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