CN103412091B - pH value measuring method and device - Google Patents

Abstract

The embodiment of the present invention discloses a method for measuring the pH value, which measures the pH values at three positions in the reactor simultaneously, and judges whether the first pH value is based on the difference between the first pH value, the second pH value, and the third pH value. Not available, when the first pH value is available, the average value of the three pH values is used as the pH value of the solution in the reactor, when the first pH value is not available, the average value of the second pH value and the third pH value is used as the The pH value of the solution in the reactor. The pH value measurement method that the embodiment of the present application provides, when a certain pH meter breaks down, can find out in time, and when calculating the pH value of the solution in the reactor, remove the pH value measured by the pH meter that has failed, and improve the The accuracy of the pH value measurement of the solution in the reactor reduces the error in the pH value control of the solution during the production process. The application also discloses a pH value measuring device.

Description

Method and device for measuring pH value

technical field

The invention relates to the technical field of measurement, and more specifically, to a method and device for measuring pH value.

Background technique

In the production process of pharmaceutical production, sewage treatment, preparation and petrochemical, etc., it is necessary to accurately control the pH value of the solution, and the key step to control the pH value of the solution is to obtain the pH value of the solution.

At present, the method of measuring the pH value of the solution is to install two pH meters on the reactor (a container for related reactions) to measure the solution in the reactor, and take the average of the pH values measured by the two pH meters as the reaction The pH of the solution in the kettle.

However, in the current pH measurement method, when a pH meter breaks down, it cannot be detected in time, which makes the measurement of the pH of the solution in the reactor inaccurate, and causes a large error in the control of the pH of the solution during the production process.

Contents of the invention

The purpose of the present invention is to provide a method for measuring the pH value, so as to solve the problem that the pH meter cannot be detected in time when the fault occurs, which makes the pH value measurement inaccurate.

To achieve the above object, the present invention provides the following technical solutions:

A method for measuring pH comprising:

Simultaneously obtain the pH values of the solutions at three positions in the reactor;

judging whether the first pH value among the three pH values is unavailable;

When it is judged that the first pH value is unavailable, the average value of the second pH value and the third pH value in the three pH values is determined as the pH value of the solution in the reactor; otherwise, the three The average value of the pH value is determined as the pH value of the solution in the reactor;

Wherein, judging whether the first pH value in the three pH values is unavailable includes:

performing difference calculations on the first pH value and the second pH value and the third pH value among the three pH values, to obtain the first difference value and the second difference value;

When both the absolute value of the first difference and the absolute value of the second difference are greater than a first preset threshold, it is determined that the first pH value is unavailable; otherwise, it is determined that the first pH value is available.

In the above method, preferably, the first preset threshold is 1.5.

The above method, preferably, after determining the average value of the second pH value and the third pH value as the pH value of the solution in the reactor, also includes:

Simultaneously obtain the pH values of the solutions at three positions in the reactor;

judging whether the first pH value is available again;

When it is judged that the first pH value is available again, performing the step of determining the average value of the obtained three pH values as the pH value of the solution in the reactor;

Wherein, judging whether the first pH value is available again includes:

performing difference calculations on the first pH value, the second pH value and the third pH value respectively, to obtain a third difference value and a fourth difference value;

When the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, it is judged that the first pH value is recoverable; otherwise, it is judged that the first pH value is not recovered available.

In the above method, preferably, the second preset threshold is 1.

The above method, preferably, also includes:

Acquiring pH value cut-off information, the pH value cut-off information includes an identification mark of the cut-off pH value;

The average value of the uncut pH values is determined as the pH value of the solution in the reactor according to the pH value cut information.

The above method, preferably, also includes:

Acquiring pH value loading information, the pH value loading information includes an identification mark of the pH value to be loaded;

A step of determining the average value of the obtained three pH values as the pH value of the solution in the reactor is performed.

A pH measuring device comprising:

Three pH meters dispersedly installed on the reactor, the three pH meters are used to measure the pH value at three positions in the reactor;

A controller connected to the three pH meters, the controller comprising:

The first acquisition unit is used to simultaneously acquire the pH values of the solutions at three positions in the reactor;

The first judging unit is used to judge whether the first pH value among the three pH values is unavailable, including: comparing the first pH value with the second pH value and the third pH value among the three pH values, respectively. Perform difference calculation on the pH value to obtain the first difference and the second difference; when the absolute value of the first difference and the absolute value of the second difference are greater than the first preset threshold, it is judged that the The first pH value is not available, otherwise, it is determined that the first pH value is available;

a first determination unit, configured to determine the average value of the second pH value and the third pH value as the pH value of the solution in the reactor when the first pH value is unavailable;

The second determination unit is configured to determine the average value of the three pH values as the pH value of the solution in the reactor when the first pH value of the three pH values is available.

The above-mentioned device, preferably, the controller also includes:

The second judging unit is used to judge whether the first pH value is available again, including: calculating the difference between the first pH value and the second pH value and the third pH value respectively to obtain the third difference and the first pH value. Four difference values; when the absolute value of the third difference value and the absolute value of the fourth difference value are both smaller than the second preset threshold, it is judged that the first pH value is available again; otherwise, it is judged that the first pH value pH is not restored to usable;

The third determination unit is configured to determine the average value of the three pH values as the pH value of the solution in the reactor when the first pH value is available again.

The above-mentioned device, preferably, the controller also includes:

The second acquisition unit is configured to acquire pH value cut-off information, and the pH value cut-off information includes an identification mark of the cut off pH value;

The fourth determination unit is configured to determine the average value of the uncut pH values as the pH value of the solution in the reactor according to the pH value cut information.

The above-mentioned device, preferably, the controller also includes:

A third acquisition unit, configured to acquire pH loading information, where the pH loading information includes an identification of the pH to be loaded;

The fifth determination unit is configured to determine the average value of the three pH values as the pH value of the solution in the reactor when the third acquisition unit acquires the pH value loading information.

It can be seen from the above scheme that a method for measuring pH value provided by the present application simultaneously measures the pH values at three positions in the reactor, and judges the first pH value by the difference between the first pH value and the second pH value and the third pH value. Whether the pH value is unavailable, when the first pH value is available, the average value of the three pH values is used as the pH value of the solution in the reactor, when the first pH value is unavailable, the second pH value and the third pH value are used The average value is taken as the pH value of the solution in the reactor. That is to say, the method for measuring the pH value provided by the embodiment of the present application, when a certain pH meter breaks down, can be found in time, and when calculating the pH value of the solution in the reactor, the pH value measured by the failed pH meter The removal improves the accuracy of the pH value measurement of the solution in the reactor, and reduces the error in the pH value control of the solution during the production process.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the flowchart of a kind of pH measuring method that the embodiment of the present application provides;

Fig. 2 is the flow chart of another kind of pH measuring method provided by the embodiment of the present application;

Fig. 3 is the structural representation of a kind of pH measuring device provided by the embodiment of the present application;

Figure 4 is a schematic structural view of another pH measuring device provided in the embodiment of the present application;

Fig. 5 is a structural schematic diagram of another pH measuring device provided in the embodiment of the present application;

FIG. 6 is a schematic structural view of another pH measuring device provided in the embodiment of the present application;

Fig. 7 is the front view of the reactor when the pH meter provided by the embodiment of the application is installed on the reactor;

Fig. 8 is a top view of the reactor shown in Fig. 7 provided in the embodiment of the present application.

The terms "first", "second", "third", "fourth", etc., if any, in the description and claims and the above drawings are used to distinguish similar parts and not necessarily to describe specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated herein.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Please refer to Fig. 1, Fig. 1 is the flowchart of a kind of pH measuring method that the embodiment of the present application provides, including:

Step S101: Simultaneously obtain the pH values of the solutions at three positions in the reactor;

The pH values of the solutions at the three positions can be measured by three pH meters dispersedly installed on the reactor, preferably, the three pH meters can be evenly distributed and installed on the reactor, such as any two The angle between the pH meters is 120°.

Step S102: judging whether the first pH value among the three pH values is unavailable may include:

performing difference calculations on the first pH value and the second pH value and the third pH value among the three pH values, to obtain the first difference value and the second difference value;

When both the absolute value of the first difference and the absolute value of the second difference are greater than a first preset threshold, it is determined that the first pH value is unavailable; otherwise, it is determined that the first pH value is available. Preferably, the first preset threshold can be 1.5. Of course, the first preset threshold is not limited to 1.5, and can be adjusted appropriately according to actual needs. For example, when the accuracy requirement is high, the first preset threshold can be lowered. A threshold is set. When the accuracy requirement is low, the first preset threshold can be increased.

The following example illustrates whether one of the three pH values is unavailable. Assuming that the three pH values are pH1, pH2 and pH3, then, if |pH1-pH2|>1.5, and |pH1-pH3|>1.5 , it is judged that pH1 is not available; similarly, if |pH2-pH1|>1.5, and |pH2-pH3|>1.5, it is judged that pH2 is not available; if |pH3-pH1|>1.5, and |pH3-pH2|> 1.5, it is judged that pH3 is not available. Among them, |·| represents the absolute value operation.

When it is judged that the first pH value is unavailable, execute step S103, otherwise, execute step S104;

That is to say, when it is determined that one pH value is not available, step S103 is performed; when it is determined that all pH values are available, step S104 is performed.

Step S103: determining the average value of the second pH value and the third pH value as the pH value of the solution in the reactor;

That is to say, when it is judged that a certain pH value is unusable, the unusable pH value is removed, and only the available pH value is used to determine the pH value of the solution in the reactor.

Step S104: Determine the average value of the three pH values as the pH value of the solution in the reactor.

A method for measuring the pH value provided by the embodiment of the present application measures the pH values at three positions in the reactor at the same time, and judges whether the first pH value is based on the difference between the first pH value and the second pH value and the third pH value. Not available, when the first pH value is available, the average value of the three pH values is used as the pH value of the solution in the reactor, when the first pH value is not available, the average value of the second pH value and the third pH value is used as the The pH value of the solution in the reactor. That is to say, the method for measuring the pH value provided by the embodiment of the present application, when a certain pH meter breaks down, can be found in time, and when calculating the pH value of the solution in the reactor, the pH value measured by the failed pH meter The removal improves the accuracy of the pH value measurement of the solution in the reactor, and reduces the error in the pH value control of the solution during the production process.

Moreover, since the pH measurement method provided in the embodiment of the present application measures the pH values at three positions in the reactor, when the pH value at a certain position is unavailable, the pH value at the other two positions can also be used to determine The pH value of the solution in the reactor avoids the use of two pH meters for measurement. When one pH meter fails, only one pH meter is in working condition, which cannot reflect the reactor well (especially the larger reactor) The pH value of the internal solution.

It should be noted that, in the embodiment of the present application, since the measurement of the pH value is applied in the production process, the measurement of the pH value is also carried out periodically, that is to say, in this embodiment, the simultaneous acquisition of the reactor The pH value of the solution at the three positions in the reactor is carried out periodically, and each time the pH value of the solution in the three positions in the reactor is obtained, the pH value of the solution in the reactor must be determined according to the above method.

On the basis of the embodiment shown in Figure 1, the flow chart of another pH value measurement method provided by the embodiment of the present application is shown in Figure 2. After judging that the first pH value is unavailable, the second pH value After the average value of the third pH value is determined as the pH value of the solution in the reactor, it can also include:

Step S201: Simultaneously obtain the pH values of the solutions at three positions in the reactor;

Step S202: judging whether the first pH value is available again, including:

performing difference calculations on the first pH value, the second pH value and the third pH value respectively, to obtain a third difference value and a fourth difference value;

When the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, it is judged that the first pH value is recoverable; otherwise, it is judged that the first pH value is not recovered available. Preferably, the second preset threshold can be 1. Of course, the first preset threshold is not limited to 1, and can be adjusted appropriately according to actual needs. For example, when the accuracy requirement is high, the second preset threshold can be lowered. A threshold is set, and when the accuracy requirement is low, the second preset threshold can be increased.

When it is determined that the first pH value is available again, execute step S104; otherwise, execute step S103.

The above embodiments, preferably, may also include:

Acquiring pH value cut-off information, the pH value cut-off information includes an identification mark of the cut-off pH value;

Since the pH meter needs to be calibrated on time, that is, it needs to be calibrated manually after running for a certain period of time. Therefore, in the embodiment of the present application, when a certain pH meter needs to be calibrated, the user can manually input the pH value cut off of a certain pH value. information, and can also generate pH cut information after the user triggers the corresponding button.

The average value of the uncut pH values is determined as the pH value of the solution in the reactor according to the pH value cut information.

After obtaining the pH value cut-off information, it indicates that the pH meter corresponding to the cut-off pH value needs to be calibrated. Therefore, when calculating the pH value of the solution in the reactor, the cut-off pH value is no longer used, but refers to the The average value of the excised pH values was taken as the pH value of the solution in the reactor.

The above embodiments, preferably, may also include:

Acquiring pH value loading information, the pH value loading information includes an identification mark of the pH value to be loaded;

When the pH meter is put into operation again after the calibration is completed, the user can manually input the information of loading the pH value, that is, the pH value loading information, or the user can trigger the corresponding button to generate the pH value loading information;

A step of determining the average value of the obtained three pH values as the pH value of the solution in the reactor is performed.

After obtaining the pH value loading information, it means that the loaded pH value is available. At this time, the loaded pH value is put into the pH value calculation process of the solution in the reactor, that is, the average value of the three pH values is used as the solution in the reactor pH value.

In the above embodiment, preferably, when it is determined that a pH meter is unavailable, an alarm may also be given to remind the staff to deal with the pH meter corresponding to the unavailable pH value in time.

Corresponding to the method embodiment, the embodiment of the present application also provides a pH value measuring device, the structural diagram of which is shown in Figure 3, which may include:

Three pH meters, the three pH meters are dispersedly installed on the reactor, and the three pH meters are used to measure the pH values at three positions in the reactor. Preferably, the three pH meters can be evenly distributed on the reactor, that is, the angle between any two pH meters is 120°.

The controller 301 connected with each pH meter, the controller 301 may include:

The first acquisition unit 3011 is used to simultaneously acquire the pH values of the solutions at three positions in the reactor;

The first judging unit 3012 is configured to judge whether the first pH value among the three pH values is unavailable, including: combining the first pH value with the second pH value and the second pH value among the three pH values, respectively. The three pH values perform difference calculations to obtain the first difference and the second difference; when the absolute value of the first difference and the absolute value of the second difference are greater than the first preset threshold, determine the The first pH value is not available, otherwise, it is determined that the first pH value is available;

The first determination unit 3013 is configured to determine the average value of the second pH value and the third pH value as the pH value of the solution in the reactor when the first pH value is unavailable;

The second determination unit 3014 is configured to determine the average value of the three pH values as the pH value of the solution in the reactor when the first pH value among the three pH values is available.

On the basis of the embodiment shown in FIG. 3 , a schematic structural diagram of another pH measuring device provided in the embodiment of the present application is as shown in FIG. 4 , and the controller 301 may also include:

The second judging unit 401 is used to judge whether the first pH value is available again, and may include: performing difference calculations on the first pH value, the second pH value and the third pH value respectively to obtain a third difference value and the fourth difference; when the absolute value of the third difference and the absolute value of the fourth difference are both smaller than the second preset threshold, it is judged that the first pH value is available again; otherwise, it is judged that the The first pH value is not available again;

The third determination unit 402 is configured to determine the average value of the three pH values as the pH value of the solution in the reactor when the first pH value is available again.

On the basis of the embodiment shown in FIG. 3 , a structural schematic diagram of another pH measuring device provided in the embodiment of the present application is as shown in FIG. 5 , and the controller 301 may also include:

The second acquisition unit 501 is configured to acquire pH value cut information, and the pH value cut information includes an identification mark of the cut pH value;

The fourth determination unit 502 is configured to determine the average value of the uncut pH values as the pH value of the solution in the reactor according to the pH value cut information.

On the basis of the embodiment shown in FIG. 5 , a structural schematic diagram of another pH measuring device provided in the embodiment of the present application is shown in FIG. 6 , and the controller 301 may also include:

The third obtaining unit 601 is configured to obtain pH value loading information, the pH value loading information includes an identification mark of the pH value to be loaded;

The fifth determination unit 602 is configured to determine the average value of the three pH values as the pH value of the solution in the reactor when the third acquisition unit acquires the pH value loading information.

It should be noted that, in the embodiment of the present application, the first acquisition unit 3011 and the second acquisition unit 501 can be integrated into one functional module, that is, the functions of the first acquisition unit 3011 and the second acquisition unit 501 can be composed of A functional module to achieve;

The first judging unit 3012 and the second judging unit 401 can also be integrated into one functional module, that is, the functions of the first judging unit 3012 and the second judging unit 401 can also be realized by one functional module;

Similarly, the first determining unit 3013, the second determining unit 3014, the third determining unit 402, the fourth determining unit 502, and the fifth determining unit 602 may also be integrated into one functional module.

In the above-mentioned embodiment, the installation positions of the three pH meters on the reactor can be referred to Figure 7 and Figure 8; Figure 7 is the front view of the reactor when the pH meter provided by the embodiment of the application is installed on the reactor; Figure 8 is The top view of the reaction kettle shown in Figure 7 provided by the embodiment of the present application; certainly, Figure 7 and Figure 8 only show a kind of installation method of the pH meter, and other installation methods can also be used, such as three pH meters on the same plane Evenly distributed inside, that is, the angle between each pH meter is 120°. Of course, the three pH meters can also be unevenly distributed in the same plane. Similarly, the three pH meters can not be in the same plane.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A pH measuring method, characterized in that, comprising: Simultaneously obtain the pH values of the solutions at three positions in the reactor; judging whether the first pH value among the three pH values is unavailable; When it is judged that the first pH value is unavailable, the average value of the second pH value and the third pH value in the three pH values is determined as the pH value of the solution in the reactor; otherwise, the three The average value of the pH value is determined as the pH value of the solution in the reactor; Wherein, judging whether the first pH value in the three pH values is unavailable includes: performing difference calculations on the first pH value and the second pH value and the third pH value among the three pH values, to obtain the first difference value and the second difference value; When the absolute value of the first difference and the absolute value of the second difference are greater than a first preset threshold, it is judged that the first pH value is unavailable, otherwise, it is judged that the first pH value is available; The method also includes: Obtaining pH value cut information, the pH value cut information includes the identification mark of the cut pH value; according to the pH value cut information, the average value of the uncut pH value is determined as the pH value of the solution in the reactor; Acquire pH value loading information, the pH value loading information includes the identification mark of the pH value to be loaded; perform the step of determining the average value of the obtained three pH values as the pH value of the solution in the reactor; in, The process of obtaining the pH value cut-off information is as follows: when a certain pH meter needs to be calibrated, the user can manually input the pH value cut-off information for cutting off a certain pH value, or generate the pH value cut-off information after the user triggers a corresponding button; The process of obtaining the pH loading information is as follows: when the pH meter is put into operation again after calibration, the user can manually input the pH loading information, or the user can trigger the corresponding button to generate the pH loading information. 2. The method according to claim 1, wherein the first preset threshold is 1.5. 3. method according to claim 1, is characterized in that, after the average value of second pH value and the 3rd pH value is determined as the pH value of solution in reactor, also comprises: Simultaneously acquire the pH values of the solutions at three positions in the reactor; judging whether the first pH value is available again; When it is judged that the first pH value is available again, performing the step of determining the average value of the obtained three pH values as the pH value of the solution in the reactor; Wherein, judging whether the first pH value is available again includes: performing difference calculations on the first pH value, the second pH value and the third pH value respectively, to obtain a third difference value and a fourth difference value; When the absolute value of the third difference and the absolute value of the fourth difference are both smaller than a second preset threshold, it is judged that the first pH value is recoverable; otherwise, it is judged that the first pH value is not recovered available. 4. The method according to claim 3, wherein the second preset threshold is 1. 5. A pH measuring device, characterized in that, comprising: Three pH meters dispersedly installed on the reactor, the three pH meters are used to measure the pH value at three positions in the reactor; A controller connected to the three pH meters, the controller comprising: The first acquisition unit is used to simultaneously acquire the pH values of the solutions at three positions in the reactor; The first judging unit is used to judge whether the first pH value among the three pH values is unavailable, including: comparing the first pH value with the second pH value and the third pH value among the three pH values, respectively. Perform difference calculation on the pH value to obtain the first difference and the second difference; when the absolute value of the first difference and the absolute value of the second difference are greater than the first preset threshold, it is judged that the The first pH value is not available, otherwise, it is determined that the first pH value is available; a first determination unit, configured to determine the average value of the second pH value and the third pH value as the pH value of the solution in the reactor when the first pH value is unavailable; The second determination unit is used to determine the average value of the three pH values as the pH value of the solution in the reactor when the first pH value of the three pH values is available; The controller also includes: The second acquisition unit is configured to acquire pH value cut-off information, and the pH value cut-off information includes an identification mark of the cut off pH value; The fourth determination unit is used to determine the average value of the uncut pH value as the pH value of the solution in the reactor according to the pH value cut information; A third acquisition unit, configured to acquire pH loading information, where the pH loading information includes an identification of the pH to be loaded; The fifth determination unit is used to determine the average value of the three pH values as the pH value of the solution in the reactor when the third acquisition unit acquires the pH value loading information; in, The process of obtaining the pH value cut-off information is as follows: when a certain pH meter needs to be calibrated, the user can manually input the pH value cut-off information for cutting off a certain pH value, or generate the pH value cut-off information after the user triggers a corresponding button; The process of obtaining the pH loading information is as follows: when the pH meter is put into operation again after calibration, the user can manually input the pH loading information, or the user can trigger the corresponding button to generate the pH loading information. 6. The device according to claim 5, wherein the controller further comprises: The second judging unit is used to judge whether the first pH value is available again, including: calculating the difference between the first pH value and the second pH value and the third pH value respectively to obtain the third difference and the first pH value. Four difference values; when the absolute value of the third difference value and the absolute value of the fourth difference value are both smaller than the second preset threshold, it is judged that the first pH value is available again; otherwise, it is judged that the first pH value pH is not restored to usable; The third determination unit is configured to determine the average value of the three pH values as the pH value of the solution in the reactor when the first pH value is available again.