CN114544882A - Novel method for on-line monitoring of acid-base concentration of material - Google Patents
Novel method for on-line monitoring of acid-base concentration of material Download PDFInfo
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- CN114544882A CN114544882A CN202210225435.0A CN202210225435A CN114544882A CN 114544882 A CN114544882 A CN 114544882A CN 202210225435 A CN202210225435 A CN 202210225435A CN 114544882 A CN114544882 A CN 114544882A
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- 239000000463 material Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 163
- 239000011259 mixed solution Substances 0.000 claims description 12
- 230000001105 regulatory effect Effects 0.000 claims description 9
- 239000012086 standard solution Substances 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims 1
- 239000000243 solution Substances 0.000 description 11
- 239000002253 acid Substances 0.000 description 5
- 238000001514 detection method Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
Abstract
The invention discloses a novel method for monitoring acid-base concentration of a material on line, which comprises the following steps: step one, mixing standard liquid, namely fully mixing the detected liquid and the standard liquid to obtain mixed liquid; detecting the mixed liquor, namely detecting the pH value of the mixed liquor by using a pH detector; and step three, calculating the pH value of the measured liquid, and converting the initial pH value of the original measured liquid according to the amount of the standard liquid and the pH value of the mixed liquid.
Description
Technical Field
The invention relates to the technical field of acid-base concentration detection equipment, in particular to a novel method for monitoring acid-base concentration of a material on line.
Background
The density monitoring method comprises the steps of measuring the density of materials with different acid-base concentrations, converting the acid-base concentration according to experimental data, and calculating the density of the materials with different acid-base concentrations, wherein the density monitoring method comprises the step of converting the density by using differential pressure before and after an orifice plate and the step of converting the density by using a U-shaped pipe in a vibrating manner, so that the requirements of online density detection can be met, in the chemical process, the acid-base materials often contain other substances such as miscellaneous salts, the density of the acid-base materials can be seriously influenced by the miscellaneous salts, so that the measurement error of an instrument for measuring the converted concentration by using the online density is overlarge, the online measured concentration data is unreliable, the second method is the step of converting the acid concentration according to the online pH measuring method, the deviation caused by the calibration influence of a pH meter cannot be avoided, and the error is extremely large when the concentration is higher than 1% by calculating the pH.
Therefore, a novel method for monitoring the acid-base concentration of the material on line is provided.
Disclosure of Invention
The invention aims to provide a novel method for monitoring acid-base concentration of a material on line, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a novel method for on-line monitoring of acid-base concentration of materials comprises the following steps:
step one, mixing standard liquid
Fully mixing the detected liquid with the standard liquid to obtain a mixed liquid;
step two, detecting the mixed liquid
Detecting the pH value of the mixed solution by a pH detector;
step three, calculating the PH value of the measured liquid
The initial PH value of the original tested liquid can be converted according to the amount of the standard liquid and the PH value of the mixed liquid.
Preferably, the pH value of the mixed liquor in the first step is controlled to be 4-10.
Preferably, the pH of the mixed liquor in the first step is controlled to be 4.
Preferably, the pH of the mixed liquor in the first step is controlled to be 8.
Preferably, the liquid level meter comprises a measured liquid electromagnetic flowmeter, a mixer, a mixed liquid PH detector and a standard liquid electromagnetic flowmeter, wherein the measured liquid electromagnetic flowmeter is arranged on a feeding pipeline, the feeding pipeline is connected with the mixer, the mixer is connected with the mixed liquid PH detector, the standard liquid pipeline is provided with a standard liquid adding adjusting valve, the standard liquid electromagnetic flowmeter is arranged on the standard liquid pipeline, the measured liquid electromagnetic flowmeter is used for calculating the amount of the measured liquid, the mixer is used for fully mixing the measured liquid and the standard liquid, the mixed liquid PH detector is used for detecting the PH value of the mixed liquid, the standard liquid electromagnetic flowmeter is used for calculating the adding amount of the standard liquid, and the standard liquid adding adjusting valve is used for controlling the adding amount of the standard liquid.
Preferably, the device also comprises a flow-limiting orifice plate, and the liquid to be detected enters the mixer after passing through the flow-limiting orifice plate.
Compared with the prior art, the invention has the beneficial effects that: the utility model provides a novel method of on-line monitoring material acid-base concentration, through adding the standard liquid and mixing in the measured liquid mutually, with the pH value control of mixed liquid after certain extent, detect its pH value by the PH meter, because of the PH meter is great at the great measured liquid acid-base concentration time deviation of measurement acid-base concentration, but the PH meter can be accurate the less measured liquid acid-base concentration of measurement acid-base concentration, control mixed liquid PH4-10, can reduce measuring error to 0.01%, and do not receive the influence of miscellaneous salt etc. in the measured liquid completely.
Drawings
Fig. 1 is a schematic diagram of the working principle of the present invention.
In the figure: 1-measured liquid electromagnetic flowmeter, 2-mixer, 3-mixed liquid PH detector, 4-standard liquid electromagnetic flowmeter, 5-standard liquid supplement regulating valve, 6-current limiting orifice plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, the present invention provides a technical solution: a novel method for on-line monitoring of acid-base concentration of materials comprises the following steps:
step one, mixing standard liquid
Fully mixing a measured liquid with a standard liquid to obtain a mixed liquid, wherein the amount of the added measured liquid and the added standard liquid is a fixed value, and neutralizing a measured material by using 1 mol% (other concentrations can be used according to the process condition);
step two, detecting the mixed liquid
The PH value of the mixed solution is detected by a PH detector, and the acid concentration of the mixed solution is low, so that the deviation of the PH detector is small;
step three, calculating the PH value of the measured liquid
The initial PH value of the original tested liquid can be converted according to the amount of the standard liquid and the PH value of the mixed liquid.
Specifically, the pH value of the mixed liquor in the step one is controlled to be 4-10.
Specifically, the pH of the mixed solution in the first step is controlled to be 4.
In the technical scheme, the tested liquid and the standard liquid are mixed to control PH4-10, the acid-base concentration of the tested liquid can be obtained through conversion of the standard liquid amount, the measurement error can be reduced to 0.01% by the technology and is not influenced by impurities in the tested liquid, instruments, regulating valves and the like in the system are conventional instruments, no severe working condition equipment exists, and the existing equipment technology is completely met.
Specifically, as shown in fig. 1, the device further includes a measured liquid electromagnetic flowmeter 1, a mixer 2, a mixed liquid PH detector 3, and a standard liquid electromagnetic flowmeter 4, wherein the measured liquid electromagnetic flowmeter 1 is disposed on a feed pipe, the measured liquid is injected into the mixer 2 through the feed pipe, the feed pipe is connected to the mixer 2, the mixer 2 is connected to the mixed liquid PH detector 3, the mixed liquid PH detector 3 can detect the mixed liquid mixed in the mixer 2, the mixer 2 is connected to a standard liquid pipe, a standard liquid supplement regulating valve 5 is disposed on the standard liquid pipe, the standard liquid electrical flowmeter 4 is disposed on the standard liquid pipe, the standard liquid electromagnetic flowmeter 4 is used for calculating the amount of the standard liquid for subsequent calculation, the measured liquid electromagnetic flowmeter 1 is used for calculating the amount of the measured liquid, the mixer 2 is used for fully mixing the measured liquid and the standard liquid, the mixed liquid PH detector 3 is used for detecting the PH value of the mixed liquid, the standard liquid electromagnetic flowmeter 4 is used for calculating the adding amount of the standard liquid, and the standard liquid adding regulating valve 5 is used for controlling the adding amount of the standard liquid.
Specifically, the device further comprises a flow-limiting orifice plate 6, the liquid to be detected enters the mixer 3 after passing through the flow-limiting orifice plate 6, the flow of the liquid to be detected is controlled through the flow-limiting orifice plate 6, and in the embodiment, 10L/h of material is introduced by using the flow-limiting orifice plate 6.
The working principle is as follows: the invention discloses an on-line acid concentration detection method based on a complete set of instrument and instrument system, which uses a current-limiting orifice plate 6 to introduce 10L/h of material, uses 1 mol% (other concentrations can be used according to process conditions) of standard solution to neutralize the material to be detected, uses a PH meter to detect the solution after neutralization, controls the PH of mixed solution to be 4-10 through automatic control, uses an electromagnetic flowmeter to detect the standard solution addition amount and the flow rate of the detected solution, and converts the concentration of the detected solution through the standard solution addition amount and the flow rate of the detected solution.
Example 2
Referring to fig. 1, the present invention provides a technical solution: a novel method for on-line monitoring of acid-base concentration of materials comprises the following steps:
step one, mixing standard liquid
Fully mixing a measured liquid with a standard liquid to obtain a mixed liquid, wherein the amount of the added measured liquid and the added standard liquid is a fixed value, and neutralizing a measured material by using 1 mol% (other concentrations can be used according to the process condition);
step two, detecting the mixed liquid
The PH value of the mixed solution is detected by a PH detector, and the acid concentration of the mixed solution is low, so that the deviation of the PH detector is small;
step three, calculating the PH value of the measured liquid
The initial PH value of the original tested liquid can be converted according to the amount of the standard liquid and the PH value of the mixed liquid.
Specifically, the pH value of the mixed liquor in the step one is controlled to be 4-10.
Specifically, the PH of the mixed solution in the first step is controlled to be 8, and compared with example 1, the PH is controlled to be a larger value, so that the PH of the mixed solution can be detected conveniently, the deviation of the detection result is ensured to be smaller, and the filling amount of the standard solution is increased.
In the technical scheme, the tested liquid and the standard liquid are mixed to control PH4-10, the acid-base concentration of the tested liquid can be obtained through conversion of the standard liquid amount, the measurement error can be reduced to 0.01% by the technology and is not influenced by impurities in the tested liquid, instruments, regulating valves and the like in the system are conventional instruments, no severe working condition equipment exists, and the existing equipment technology is completely met.
Specifically, as shown in fig. 1, the device further includes a measured liquid electromagnetic flowmeter 1, a mixer 2, a mixed liquid PH detector 3, and a standard liquid electromagnetic flowmeter 4, wherein the measured liquid electromagnetic flowmeter 1 is disposed on a feed pipe, the measured liquid is injected into the mixer 2 through the feed pipe, the feed pipe is connected to the mixer 2, the mixer 2 is connected to the mixed liquid PH detector 3, the mixed liquid PH detector 3 can detect the mixed liquid mixed in the mixer 2, the mixer 2 is connected to a standard liquid pipe, a standard liquid supplement regulating valve 5 is disposed on the standard liquid pipe, the standard liquid electrical flowmeter 4 is disposed on the standard liquid pipe, the standard liquid electromagnetic flowmeter 4 is used for calculating the amount of the standard liquid for subsequent calculation, the measured liquid electromagnetic flowmeter 1 is used for calculating the amount of the measured liquid, the mixer 2 is used for fully mixing the measured liquid and the standard liquid, the mixed liquid PH detector 3 is used for detecting the PH value of the mixed liquid, the standard liquid electromagnetic flowmeter 4 is used for calculating the adding amount of the standard liquid, and the standard liquid adding regulating valve 5 is used for controlling the adding amount of the standard liquid.
Specifically, the device further comprises a flow-limiting orifice plate 6, the liquid to be detected enters the mixer 3 after passing through the flow-limiting orifice plate 6, the flow of the liquid to be detected is controlled through the flow-limiting orifice plate 6, and in the embodiment, 10L/h of material is introduced by using the flow-limiting orifice plate 6.
The working principle is as follows: the invention discloses an on-line acid concentration detection method based on a complete set of instrument and instrument system, which uses a current-limiting orifice plate 6 to introduce 10L/h of material, uses 1 mol% (other concentrations can be used according to process conditions) of standard solution to neutralize the material to be detected, uses a PH meter to detect the solution after neutralization, controls the PH of mixed solution to be 4-10 through automatic control, uses an electromagnetic flowmeter to detect the standard solution addition amount and the flow rate of the detected solution, and converts the concentration of the detected solution through the standard solution addition amount and the flow rate of the detected solution.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A novel method for on-line monitoring of acid-base concentration of materials is characterized by comprising the following steps: the method comprises the following steps:
step one, mixing standard liquid
Fully mixing the detected liquid with the standard liquid to obtain a mixed liquid;
step two, detecting the mixed liquid
Detecting the pH value of the mixed solution by a pH detector;
step three, calculating the PH value of the measured liquid
The initial PH value of the original measured liquid can be converted according to the amount of the standard liquid and the PH value of the mixed liquid.
2. The novel method for on-line monitoring of acid-base concentration of material according to claim 1, characterized in that: and in the first step, the pH value of the mixed solution is controlled to be 4-10.
3. The novel method for on-line monitoring of acid-base concentration of material according to claim 2, characterized in that: and controlling the pH value of the mixed liquor in the step one to be 4.
4. The novel method for on-line monitoring of the acid-base concentration of the material according to claim 2, characterized in that: and controlling the pH value of the mixed liquor in the step one to be 8.
5. The novel method for on-line monitoring of acid-base concentration of material according to any one of claims 1-4, characterized in that: the device is characterized by further comprising a measured liquid electromagnetic flowmeter (1), a mixer (2), a mixed liquid PH detector (3) and a standard liquid electromagnetic flowmeter (4), wherein the measured liquid electromagnetic flowmeter (1) is arranged on a feeding pipeline, the feeding pipeline is connected with the mixer (2), the mixer (2) is connected with the mixed liquid PH detector (3), the mixer (2) is connected with a standard liquid pipeline, a standard liquid replenishing regulating valve (5) is arranged on the standard liquid pipeline, the standard liquid electric flowmeter (4) is arranged on the standard liquid pipeline, the measured liquid electromagnetic flowmeter (1) is used for calculating the amount of measured liquid, the mixer (2) is used for fully mixing the measured liquid with the standard liquid, the mixed liquid PH detector (3) is used for detecting the PH value of the mixed liquid, and the standard liquid electromagnetic flowmeter (4) is used for calculating the addition amount of the standard liquid, and the standard solution supplementing regulating valve (5) is used for controlling the adding amount of the standard solution.
6. The novel method for on-line monitoring of acid-base concentration of material according to claim 5, characterized in that: the device also comprises a flow-limiting orifice plate (6), and the liquid to be detected enters the mixer (3) after passing through the flow-limiting orifice plate (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210225435.0A CN114544882A (en) | 2022-03-07 | 2022-03-07 | Novel method for on-line monitoring of acid-base concentration of material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210225435.0A CN114544882A (en) | 2022-03-07 | 2022-03-07 | Novel method for on-line monitoring of acid-base concentration of material |
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|---|---|---|---|---|
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| SU1286980A1 (en) * | 1984-10-31 | 1987-01-30 | Почвенный институт им.В.В.Докучаева | Method of determining moisture content of liquid and loose materials |
| JPH02268271A (en) * | 1989-04-10 | 1990-11-01 | Kawasaki Steel Corp | Method and apparatus for quantitative analysis of isolated acid and metal ion in solution |
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