CN114689577A - Online measurement device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water - Google Patents
Online measurement device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water Download PDFInfo
- Publication number
- CN114689577A CN114689577A CN202210325942.1A CN202210325942A CN114689577A CN 114689577 A CN114689577 A CN 114689577A CN 202210325942 A CN202210325942 A CN 202210325942A CN 114689577 A CN114689577 A CN 114689577A
- Authority
- CN
- China
- Prior art keywords
- alkalinity
- cooling water
- circulating cooling
- indicator
- reaction tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
The invention discloses a device and a method for on-line measurement of phenolphthalein alkalinity and total alkalinity of circulating cooling water. The reaction unit comprises a first indicator reagent bottle, a first indicator plunger pump, a second indicator reagent bottle, a second indicator plunger pump, a standard solution reagent bottle, a standard solution plunger pump, a water inlet electromagnetic valve, a magnetic stirrer and a flow reaction tank; the outlets of the first indicator plunger pump, the second indicator plunger pump and the standard liquid peristaltic pump are respectively connected with different liquid inlets at the top of the flow-through reaction tank through pipelines. The control and detection unit comprises a controller, a light source and a light sensor; the controller is respectively and electrically connected with the light source, the light sensor, the water inlet electromagnetic valve, the magnetic stirrer, the first indicator plunger pump, the second indicator plunger pump and the standard liquid peristaltic pump. The method can conveniently realize the simultaneous on-line measurement of the phenolphthalein alkalinity and the total alkalinity of the industrial circulating cooling water without manual intervention.
Description
Technical Field
The invention relates to the technical field of on-line measurement of water quality of industrial circulating cooling water, in particular to a device and a method for on-line measurement of phenolphthalein alkalinity and total alkalinity of circulating cooling water.
Background
In industrial production, the cooling of the equipment, material or medium is mainly carried out by cooling with industrial circulating cooling water. Along with temperature rise, heat dissipation evaporation, the continuous concentration of industrial circulating cooling water is easy to generate scaling, once the scaling is light, equipment operation is influenced, and if the scaling is heavy, the equipment is scrapped or stopped for maintenance. The main reason for the most common scaling of the circulating cooling water system is that the concentration of carbonate and bicarbonate in the circulating cooling water exceeds the precipitation concentration, so that the scale is precipitated. The most of the components of phenolphthalein alkalinity and total alkalinity in the general circulating cooling water are carbonate and bicarbonate, so that the method is the most effective method for preventing carbonate scales from forming in the circulating cooling water under the condition of reasonably controlling the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water. In addition, in some circulating cooling water systems, in order to avoid carbonate scaling, excessive acidic substances are added to remove alkalinity, so that system materials are corroded, and the control of the alkalinity of the circulating cooling water is an effective method for avoiding corrosion caused by excessive addition of acid. Therefore, the timely monitoring and control of the phenolphthalein alkalinity and the total alkalinity in the circulating cooling water have great significance for preventing the circulating cooling water system from scaling and corroding.
At present, the phenolphthalein alkalinity and the total alkalinity in an industrial circulating cooling water system are mostly monitored by manual detection. Although the method is mature, detection personnel are required, the cost of operating labor is increased, and the operation is complicated; and the detection interval is large, the monitoring of phenolphthalein alkalinity and total alkalinity content in the circulating cooling water is not timely, the operation control is lagged, and carbonate in the circulating cooling water is easily separated out to form scale. In addition, the manual detection monitoring method has large influence on human factors, is difficult to be suitable for automatic control or intelligent operation, forms potential safety hazards in production, and cannot find out the root cause of system scaling.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the device and the method for online measuring the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water, the device can online measure the phenolphthalein alkalinity and the total alkalinity content of the circulating cooling water in real time, manual intervention is not needed, the timely monitoring of the phenolphthalein alkalinity and the total alkalinity content of the circulating cooling water is ensured, a control reference is timely provided for operation, and the effect of preventing the circulating cooling water from scaling or corrosion is achieved.
In order to achieve the purpose, the invention adopts the following technical scheme:
an on-line measuring device for phenolphthalein alkalinity and total alkalinity of circulating cooling water comprises a reaction unit and a control and detection unit;
the reaction unit comprises a first indicator reagent bottle, a first indicator plunger pump, a second indicator reagent bottle, a second indicator plunger pump, a standard solution reagent bottle, a standard solution plunger pump, a water inlet electromagnetic valve and a flow reaction pool; the first indicator reagent bottle, the second indicator reagent bottle and the standard solution reagent bottle are respectively connected with different liquid inlets at the top of the flow reaction tank through pipelines;
the water inlet electromagnetic valve is arranged on a water sample inlet pipe of the flow reaction tank; a first indicator plunger pump is arranged on the pipeline of the first indicator reagent bottle, and a second indicator plunger pump is arranged on the pipeline of the second indicator reagent bottle; the standard liquid plunger pump is arranged on a pipeline of the standard liquid reagent bottle;
the control and detection unit comprises a controller, a light source and a light sensor; the light source and the light sensor are arranged on opposite side walls of the flow reaction tank; 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 plunger pump and the water inlet electromagnetic valve are all electrically connected with the controller.
As a further improvement of the invention, the water sample outlet of the flow-through reaction tank is arranged at the upper part, and the water sample outlet is arranged above the installation positions of the light source and the light sensor.
As a further improvement of the invention, the flow reaction tank is a transparent cylindrical container made of material, and a light source and a light sensor are respectively embedded in the relative positions of the middle part of the side wall of the flow reaction tank.
As a further improvement of the invention, the bottom of the flow-through reaction tank is provided with a magnetic stirrer.
A measurement method of a device for on-line measurement of phenolphthalein alkalinity and total alkalinity of circulating cooling water comprises the following steps:
opening a water inlet electromagnetic valve, flushing a water sample and adding a first indicator into a flow reaction tank after the water sample is sufficiently flushed; dropwise adding standard liquid into the flow reaction tank by using a standard liquid peristaltic pump, detecting the color change of the detected water sample in the flow reaction tank by using a light sensor, determining a first titration end point when the color of the detected water sample is changed from red to colorless, and calculating the phenolphthalein alkalinity in the circulating cooling water according to the total volume of the standard liquid dropwise added by the standard liquid peristaltic pump when the first titration end point is marked;
and adding a second indicator into the flow reaction tank by a second indicator plunger pump, stirring and reacting for 10s, dropwise adding the standard liquid into the flow reaction tank by a standard liquid peristaltic pump, detecting the color of the detected water sample in the flow reaction tank by a light sensor, determining a second titration end point when the color of the detected water sample is changed from blue-green to red, and calculating the total alkalinity in the circulating cooling water according to the total volume of the standard liquid dropwise added by the standard liquid peristaltic pump.
As a further improvement of the invention, the phenolphthalein alkalinity in the circulating cooling water is calculated according to the total volume of the standard liquid dripped by the peristaltic pump of the standard liquid at the first titration end point, and the specific method comprises the following steps:
c1＝A1·V1+b1
c1the real-time concentration of phenolphthalein alkalinity in the circulating cooling water; a. the1Is a characteristic coefficient; v1Adding the total volume of the standard solution for the first titration end point; b1Is a correction value.
As a further improvement of the invention, the total alkalinity of the circulating cooling water is calculated according to the total volume of the standard liquid dripped by the standard liquid peristaltic pump, and the specific method comprises the following steps:
C2＝A2·V2+b2
c2is the real-time concentration of the total alkalinity in the circulating cooling water; a. the2Is a characteristic coefficient; v2Adding the total volume of the standard solution at the second titration end point; b is a mixture of2Is a correction value.
As a further improvement of the invention, the measuring method of the measuring device can realize the simultaneous on-line real-time measurement of the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water.
Compared with the prior art, the invention has the following advantages:
the device realizes automatic on-line collection of the circulating cooling water, is simple and practical, has high accuracy in measuring the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water, can quickly obtain the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water, and meets the monitoring task of industrial circulating cooling water. Compared with the manual measurement of the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water at present, the online measurement of the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water can be quickly and accurately realized, errors caused by manual measurement are reduced, the problems that the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water are not monitored timely, the workload is large and the like are solved, and the automatic control or the intelligent operation of a circulating cooling water system is facilitated.
By adopting the measuring method, the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water are respectively associated with the standard liquid amount dripped into the circulating reaction tank, so that the rapidness and the accuracy of measurement of the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water are improved, the workload of operators is reduced, and the operation safety of industrial circulating cooling water is improved.
Drawings
FIG. 1 is an on-line measuring device for phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water;
FIG. 2 is a flow chart of an on-line measuring method for phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water.
Wherein, 1, a first indicator reagent bottle; 2. a first indicator plunger pump; 3. a second indicator reagent bottle; 4. a second indicator plunger pump; 5. a standard solution reagent bottle; 6. a standard liquid peristaltic pump; 7. a water inlet electromagnetic valve; 8. a magnetic stirrer; 9. a flow-through reaction cell; 10. a controller; 11. a light source; 12 light sensors.
Detailed Description
The technical solution in the embodiment of the present invention is clearly and completely described below with reference to the drawings in the embodiment of the present invention. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
As shown in FIG. 1, the device for on-line measurement of phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water comprises a reaction unit and a control and detection unit.
The reaction unit comprises 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 plunger pump 6, a water inlet electromagnetic valve 7, a magnetic stirrer 8 and a flow-through reaction tank 9; the first indicator reagent bottle 1, the second indicator reagent bottle 3 and the standard solution reagent bottle 5 are respectively connected with different liquid inlets at the top of the flow reaction tank 9 through pipelines; a first indicator plunger pump 2 is arranged on the pipeline of the first indicator reagent bottle 1, and a second indicator plunger pump 4 is arranged on the pipeline of the second indicator reagent bottle 3; the standard liquid plunger pump 6 is arranged on a pipeline of the standard liquid reagent bottle 5; the water inlet electromagnetic valve 7 is arranged on a water sample inlet pipe of the flow reaction tank 9, and the bottom of the flow reaction tank 9 is provided with a magnetic stirrer 8.
The control and detection unit comprises 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-through reaction tank 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 plunger pump 6, the water inlet electromagnetic valve 7 and the magnetic stirrer 8 are electrically connected to a controller 10 respectively.
Based on above-mentioned measuring device, its concrete working process does: the water inlet electromagnetic valve 7 controls a water sample to enter the flow reaction tank 9; the first indicator plunger pump 2 quantifies the first indicator into the flow-through reaction cell 9; and (3) turning on a magnetic stirrer 8 to stir, dropwise adding the standard liquid 5 into a flow reaction tank 9 by a standard liquid peristaltic pump 6, and determining a first titration end point when a light sensor 12 detects that the color of a detected water sample in the flow reaction tank is changed from red to colorless.
And then, quantitatively adding a second indicator into the flow reaction tank 9 by a second indicator plunger pump 4, continuously dropwise adding the standard liquid into the flow reaction tank 9 by a standard liquid peristaltic pump 6 under stirring reaction, and determining a second titration end point when the light sensor 12 detects that the color of the water sample to be detected in the flow reaction tank is changed from blue-green to red.
The controller 10 controls the water intake solenoid valve 7, the first indicator plunger pump 2, the second indicator plunger pump 4 and the standard liquid peristaltic pump 6 to be turned on or off, controls the light source 11 to be turned on or off, and the light sensor 12 obtains a data signal deaf and sends the data signal to the controller 10.
In a preferred embodiment, the flow-through reaction cell 9 is made of a columnar transparent material, and a light source 11 and a light sensor 12 are embedded in the middle of the sidewall thereof at opposite positions, respectively.
The tail ends of the pipelines corresponding to the outlets of the first indicator plunger pump 2, the second indicator plunger pump 4 and the standard liquid peristaltic pump 6 are respectively connected to the liquid inlets at the top of the flow reaction pool 9, and the water sample outlet is higher than the mounting positions of the light source 11 and the light sensor 12.
In the control process, the light source 11, the light sensor 12, the water inlet electromagnetic valve 7, the first indicator plunger pump 2, the second indicator plunger pump 4 and the magnetic stirrer 8 are respectively and electrically connected to the controller 10.
Referring to fig. 2, the measuring method based on the above described on-line measuring device for phenolphthalein alkalinity and total alkalinity of industrial circulating cooling water comprises the following steps:
the device uses a first indicator plunger pump to add a first indicator into a flow reaction tank, after mixing, standard liquid is dripped into the flow reaction tank through a standard liquid peristaltic pump, after mixing reaction, when a light sensor detects that the color of a detected water sample in the flow reaction tank is changed from red to colorless, namely a first titration end point, and the real-time concentration of phenolphthalein alkalinity in circulating cooling water is calculated according to the total volume of the standard liquid dripped at the first titration end point. And then quantitatively adding a second indicator into the flow reaction tank by a second indicator plunger pump, after stirring and reacting, continuously dropwise adding the standard liquid into the flow reaction tank by a standard liquid peristaltic pump, wherein when the light sensor detects that the color of the measured water sample in the flow reaction tank is changed from blue-green to red, the second titration end point is obtained, and the real-time concentration of the total alkalinity in the circulating cooling water is calculated according to the total volume of the standard liquid dropwise added at the second titration end point.
The method can conveniently realize the simultaneous on-line measurement of the phenolphthalein alkalinity and the total alkalinity of the industrial circulating cooling water without manual intervention.
The following description will further describe an embodiment of the present invention with reference to fig. 1 and 2.
Examples
As shown in the attached figure 1, the circulating cooling water measuring water pipe is arranged at the inlet of the water inlet electromagnetic valve 7, so that the water pressure in the measuring pipe is about 0.1Mpa, and the measured water sample can conveniently flow into the flow reaction tank 9 for measurement.
As shown in fig. 2, when the controller 10 sends a measurement instruction, the water inlet solenoid valve 7 is opened to flush the flow-through reaction tank 9, and after ensuring that the water sample in the flow-through reaction tank 9 is sufficient, the first indicator plunger pump 2 quantitatively adds the first indicator into the flow-through reaction tank 9; and (3) turning on a magnetic stirrer 8 to stir, dropwise adding the standard liquid 5 into a flow reaction tank 9 by a standard liquid peristaltic pump 6, and determining a first titration end point when a light sensor 12 detects that the color of a detected water sample in the flow reaction tank is changed from red to colorless.
And then, quantitatively adding a second indicator into the flow reaction tank 9 by a second indicator plunger pump 4, continuously dropwise adding the standard liquid into the flow reaction tank 9 by a standard liquid peristaltic pump 6 under stirring reaction, and determining a second titration end point when the light sensor 12 detects that the color of the water sample to be detected in the flow reaction tank is changed from blue-green to red.
For more detailed description, the specific steps of the invention are as follows:
after the controller 10 sends a measurement instruction, the water inlet electromagnetic valve 7 is opened to flush the flow reaction tank 9 for 30s, so as to ensure that the flow reaction tank 9 is flushed completely by the measured water sample, and after the flow reaction tank 9 is filled with the measured water sample, the water inlet electromagnetic valve 7 is closed.
With the magnetic stirrer 8 turned on, the first indicator plunger pump 2 was started to add 0.2mL of the first indicator 1 to the flow-through reaction cell 9.
After stirring for 10s, starting a standard liquid peristaltic pump 6 to drip a standard liquid 5 into a flow reaction tank 9, simultaneously starting a light source 11 and a light sensor 12 to monitor the color change of a measured water sample in the flow reaction tank 9, when the color of the measured water sample changes from red to colorless, a first titration end point is obtained, and the phenolphthalein alkalinity in the circulating cooling water is calculated according to the volume of the standard liquid dripped by the standard liquid peristaltic pump at the first titration end point, wherein the specific method comprises the following steps:
c1＝A1·V1+b1
c1the real-time concentration of phenolphthalein alkalinity in the circulating cooling water; a. the1Is a characteristic coefficient; v1Adding the total volume of the standard solution for the first titration end point; b1Is a correction value.
Then controlling a second indicator plunger pump 4 to quantitatively add a second indicator into the flow reaction tank 9, after stirring and reacting for 10s, continuously dropwise adding the standard liquid into the flow reaction tank 9 by a standard liquid peristaltic pump 6, wherein when the light sensor 12 detects that the color of the measured water sample in the flow reaction tank changes from blue-green to red, the second titration end point is obtained, and the total volume V of the standard liquid dropwise added by the standard liquid peristaltic pump is measured according to the second titration end point2The total alkalinity of the circulating cooling water is calculated, and the specific method comprises the following steps:
c2＝A2·V2+b2
c2is the real-time concentration of the total alkalinity in the circulating cooling water; a. the2Is a characteristic coefficient; v2Adding the total volume of the standard solution at the second titration end point; b2Is a correction value.
And (3) after calculating the total alkalinity result, opening the water inlet electromagnetic valve 7, flushing for 30s, closing the water inlet electromagnetic valve 7 after ensuring that the water sample which is just detected is discharged out of the flow reaction tank 9, and finishing the online measurement of the phenolphthalein alkalinity and the total alkalinity.
In conclusion, the device has a simple structure, can realize an automatic measurement process, and can conveniently realize the simultaneous on-line measurement of the phenolphthalein alkalinity and the total alkalinity of the industrial circulating cooling water without manual intervention.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The on-line measuring device for the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water is characterized by comprising a reaction unit and a control and detection unit;
the reaction unit comprises 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 plunger pump (6), a water inlet electromagnetic valve (7) and a flow reaction pool (9); the first indicator reagent bottle (1), the second indicator reagent bottle (3) and the standard solution reagent bottle (5) are respectively connected with different liquid inlets at the top of the flow reaction tank (9) through pipelines;
the water inlet electromagnetic valve (7) is arranged on a water sample inlet pipe of the circulation reaction tank (9); a first indicator plunger pump (2) is arranged on the pipeline of the first indicator reagent bottle (1), and a second indicator plunger pump (4) is arranged on the pipeline of the second indicator reagent bottle (3); the standard liquid plunger pump (6) is arranged on a pipeline of the standard liquid reagent bottle (5);
the control and detection unit comprises a controller (10), a light source (11) and a light sensor (12); the light source (11) and the light sensor (12) are arranged on the opposite side walls of the flow-through reaction tank (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 plunger pump (6) and the water inlet electromagnetic valve (7) are all electrically connected with the controller (10).
2. The on-line measurement device for phenolphthalein alkalinity and total alkalinity of circulating cooling water according to claim 1, wherein a water sample outlet of the circulation reaction tank (9) is arranged at the upper part, and the water sample outlet is arranged above the installation positions of the light source (11) and the light sensor (12).
3. The on-line measuring device for phenolphthalein alkalinity and total alkalinity of circulating cooling water according to claim 1, wherein the flow-through reaction tank (9) is a transparent cylindrical container made of a material, and a light source (11) and a light sensor (12) are respectively embedded in the middle of the side wall of the flow-through reaction tank at opposite positions.
4. The on-line measurement device for phenolphthalein alkalinity and total alkalinity of circulating cooling water according to claim 1, wherein a magnetic stirrer (8) is arranged at the bottom of the flow-through reaction tank (9).
5. The measurement method of the on-line measurement device for the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water according to any one of claims 1 to 4, characterized by comprising the following steps:
opening a water inlet electromagnetic valve (7), flushing a water sample and adding a first indicator into a flow reaction tank (9) after the water sample is sufficient for the flow reaction tank (9); dropwise adding standard liquid into a flow reaction tank (9) by a standard liquid peristaltic pump (6), detecting the color change of a detected water sample in the flow reaction tank by a light sensor (12), wherein a first titration end point is obtained when the color of the detected water sample is changed from red to colorless, and calculating the phenolphthalein alkalinity in the circulating cooling water according to the total volume of the standard liquid dropwise added by the standard liquid peristaltic pump at the first titration end point;
and a second indicator is added into the flow reaction tank (9) by a second indicator plunger pump (4), after stirring, standard liquid is dripped into the flow reaction tank (9) by a standard liquid peristaltic pump (6), a light sensor (12) detects the color of a detected water sample in the flow reaction tank, the color of the detected water sample is a second titration end point when the color of the detected water sample is changed from blue-green to red, and the total alkalinity in the circulating cooling water is calculated according to the total volume of the standard liquid dripped into the flow reaction tank by the standard liquid peristaltic pump.
6. The method for measuring the phenolphthalein alkalinity and the total alkalinity of the recirculated cooling water according to claim 5, wherein the total volume (V) of the standard solution is added by the peristaltic pump of the standard solution according to the first titration end point1) The method for calculating the phenolphthalein alkalinity in the circulating cooling water comprises the following steps:
c1＝A1·V1+b1
c1the real-time concentration of phenolphthalein alkalinity in the circulating cooling water; a. the1Is a characteristic coefficient; v1Adding the total volume of the standard solution for the first titration end point; b1Is a correction value.
7. The method for measuring the phenolphthalein alkalinity and the total alkalinity of the recirculated cooling water according to claim 5, wherein the total volume (V) of the standard solution is added dropwise by the peristaltic pump according to the standard solution2) The total alkalinity of the circulating cooling water is calculated, and the specific method comprises the following steps:
C2＝A2·V2+b2
c2is the real-time concentration of the total alkalinity in the circulating cooling water; a. the2Is a characteristic coefficient; v2Adding the total volume of the standard solution at the second titration end point; b2Is a correction value.
8. The method for measuring the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water by using the device as claimed in claim 5, wherein the method for measuring the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water can realize the simultaneous online real-time measurement of the phenolphthalein alkalinity and the total alkalinity of the circulating cooling water.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210325942.1A CN114689577A (en) | 2022-03-30 | 2022-03-30 | Online measurement device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water |
| PCT/CN2022/137982 WO2023185087A1 (en) | 2022-03-30 | 2022-12-09 | Online measurement apparatus for phenolphthalein alkalinity and total alkalinity of circulating cooling water, and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210325942.1A CN114689577A (en) | 2022-03-30 | 2022-03-30 | Online measurement device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114689577A true CN114689577A (en) | 2022-07-01 |
Family
ID=82141299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210325942.1A Pending CN114689577A (en) | 2022-03-30 | 2022-03-30 | Online measurement device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114689577A (en) |
| WO (1) | WO2023185087A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023185087A1 (en) * | 2022-03-30 | 2023-10-05 | 西安热工研究院有限公司 | Online measurement apparatus for phenolphthalein alkalinity and total alkalinity of circulating cooling water, and method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590318B (en) * | 2012-02-24 | 2014-06-11 | 深圳市特种设备安全检验研究院 | Method and device for continuously analyzing pH value, phenolphthalein end-point alkalinity, total alkalinity and chloridion concentration |
| CN111141728A (en) * | 2018-11-06 | 2020-05-12 | 王在彬 | Automatic titration end point judgment method |
| CN113567431A (en) * | 2021-08-27 | 2021-10-29 | 西安热工研究院有限公司 | Industrial circulating water alkalinity online measuring device and measuring method |
| CN113671112A (en) * | 2021-08-30 | 2021-11-19 | 西安热工研究院有限公司 | Industrial circulating water hardness on-line measuring device and measuring method |
| CN114689577A (en) * | 2022-03-30 | 2022-07-01 | 西安热工研究院有限公司 | Online measurement device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water |
-
2022
- 2022-03-30 CN CN202210325942.1A patent/CN114689577A/en active Pending
- 2022-12-09 WO PCT/CN2022/137982 patent/WO2023185087A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023185087A1 (en) * | 2022-03-30 | 2023-10-05 | 西安热工研究院有限公司 | Online measurement apparatus for phenolphthalein alkalinity and total alkalinity of circulating cooling water, and method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023185087A1 (en) | 2023-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201331497Y (en) | Permanganate index on-line automatic monitor device | |
| CN109444244A (en) | Seawater permanganate index analysis system and method | |
| CN114689577A (en) | Online measurement device and method for phenolphthalein alkalinity and total alkalinity of circulating cooling water | |
| CN109060786A (en) | Measure the detection method of industrial wastewater sulfuric acid concentration content | |
| WO2022193737A1 (en) | Intelligent control system and method for circulating cooling water system | |
| CN209086216U (en) | Utilize the full-automatic acid value detection device of oil product of overheat automatic back flow method | |
| CN209372750U (en) | Seawater permanganate index analysis system | |
| CN113567431A (en) | Industrial circulating water alkalinity online measuring device and measuring method | |
| CN112062266A (en) | Device and method for on-line monitoring and evaluation of sludge activity of municipal sewage treatment plant | |
| CN104764891A (en) | Online analyzer for excess of caustic soda | |
| CN110006893B (en) | Online automatic determination method for zirconium silane concentration | |
| CN113671112A (en) | Industrial circulating water hardness on-line measuring device and measuring method | |
| CN114689575A (en) | On-line measurement device and measurement method for calcium ions in circulating cooling water | |
| CN215727719U (en) | Industrial circulating water alkalinity on-line measuring device | |
| CN112461771A (en) | Automatic online real-time detection device and method for total iron of water vapor system of thermal power plant | |
| CN204536342U (en) | One crosses alkali number in-line analyzer | |
| JP2001318057A (en) | Residual chlorine measuring method and its device | |
| CN215985926U (en) | Industrial circulating water hardness on-line measuring device | |
| CN210051719U (en) | Automatic on-line detection device for crude oil hydrogen sulfide | |
| CN219328754U (en) | Continuous detection device for total iron of power plant | |
| CN205879839U (en) | Full -automatic on -line measuring system that is used for detecting recirculated cooling water stabilization of water quality nature | |
| CN219179377U (en) | Multi-parameter industrial water quality online monitoring device applying Internet of things technology | |
| CN214252174U (en) | High turbid water chloride ion online measurement system based on potentiometric titration method | |
| CN113984718A (en) | Circulating cooling water non-phosphorus scale and corrosion inhibitor on-line measuring device and measuring method | |
| CN221174542U (en) | Boiler water quality on-line monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |