CN211553849U - Water alkalinity detection device - Google Patents
Water alkalinity detection device Download PDFInfo
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- CN211553849U CN211553849U CN201922498750.7U CN201922498750U CN211553849U CN 211553849 U CN211553849 U CN 211553849U CN 201922498750 U CN201922498750 U CN 201922498750U CN 211553849 U CN211553849 U CN 211553849U
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Abstract
The utility model discloses a water alkalinity detection device, this water alkalinity detection device includes: the acid liquor container is used for containing standard acid liquor; the sample container is used for accommodating a water body sample; the detection part comprises a detection container, a first sample feeding pipe and a second sample feeding pipe, wherein the first sample feeding pipe is used for connecting the acid liquid container with the detection container, the second sample feeding pipe is used for connecting the sample container with the detection container, the first sample feeding pipe is provided with a first flow regulating mechanism, and the second sample feeding pipe is provided with a second flow regulating unit; and the detection probe is arranged in the detection container and is used for detecting the pH value of the mixed liquid. This device sets up acidizing fluid container and sample container, adds the acid through the water sample that awaits measuring to getting into the detection container and titrates the pH in order to reduce the water sample, surveys by the pH value of test probe to mixed liquid afterwards, and then obtains the actual pH of water sample to avoid "sodium poor" to the influence of water sample pH test value, effectively improve the accuracy that detects, reduce the error.
Description
Technical Field
The utility model belongs to the technical field of the water quality testing technique and specifically relates to a water alkalinity detection device is related to.
Background
Alkalinity refers to the total amount of species in water that can neutralize the strong acid, i.e., the total amount of species that can accept protons, H +. The substances can be roughly classified into three main groups of strong base, weak base and strong base and weak acid salt. Alkalinity is an important index for judging water quality and wastewater treatment, and is also commonly used for evaluating the buffering capacity of water bodies, the toxicity and the solubility of metals in the water bodies, and the like. In the field of industrial water treatment, the pH of a solution is adjusted to a specific value for subsequent treatment according to process requirements. For example, in a printing and dyeing mill, sewage is subjected to a series of biochemical treatments, then coagulant is added, the sewage enters an air-float coagulation tank for separation after coagulation reaction, and meanwhile, the pH value is adjusted to a certain specific higher pH value to prepare for entering the next water treatment link. Under the working condition of high alkalinity, if the pH value of the solution in the cell is directly measured by using the traditional pH electrode, the sodium difference phenomenon is easy to occur, so that the measured pH value is lower, and the subsequent process flow is influenced. Therefore, it is necessary to provide a water alkalinity detecting device with less error.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a detect water basicity detection device that error is littleer.
In a first aspect, an embodiment of the present invention provides a water alkalinity detecting device, which includes:
the acid liquor container is used for containing standard acid liquor;
the sample container is used for accommodating a water body sample;
the detection part comprises a detection container, a first sample injection pipe and a second sample injection pipe, the first sample injection pipe connects the acid liquid container and the detection container, the second sample injection pipe connects the sample container and the detection container, a first flow regulating unit is arranged on the first sample injection pipe, and a second flow regulating unit is arranged on the second sample injection pipe;
and the detection probe is arranged in the detection container and is used for detecting the pH value of the mixed liquid in the detection container.
The utility model discloses water basicity detection device has following beneficial effect at least:
set up acidizing fluid container and sample container, through the water sample that awaits measuring to getting into the detection container add the acid and titrate in order to reduce the pH of water sample, survey by the pH value of test probe to mixed liquid afterwards, and then obtain the actual pH of water sample to avoid "sodium poor" to the influence of water sample pH test value, effectively improve the accuracy that detects, reduce the error.
In addition, the scheme arranges the corresponding flow regulating units on the sample feeding pipes of the acid liquid container and the sample container flowing direction detection container, so that the acid liquid and the sample can enter the detection container for detection in a controllable range in a relatively constant amount, the pH detected by the detection probe can be guaranteed to fluctuate in a smaller range, and the detection error is reduced.
According to the utility model discloses a water basicity detection device of some embodiments still includes mixing unit for stir the realization homogeneous mixing to mixed liquid. Through the arrangement of the mixing unit, the neutralization between the acid liquor in the detection container and the water body sample is more thorough, so that the pH value of the water body sample can be more accurately measured.
According to the utility model discloses a water basicity detection device of some embodiments, mixing unit are the magnetic stirring unit, and the magnetic stirring unit includes magnetic stirrers and stirring, and the one end that detects the container is located to the magnetic stirrers, and the stirring is located and detects the container, can be driven by the magnetic stirrers and carry out rotatory stirring. And the magnetic stirring unit is selected to realize more thorough mixing of the mixed liquid so as to obtain a more accurate pH value of the water sample.
According to the utility model discloses a water basicity detection device of other embodiments, first flow control unit and second flow control unit independently select from needle valve, stop valve, angle valve, solenoid valve, butterfly valve, ball valve, choke valve respectively. The valve is used as a flow regulating unit to regulate the amount of the water body sample and the acid solution entering the detection container, so that the water body sample and the acid solution can be detected at a pH value closer to 7 after being mixed, and the detection error is further reduced.
According to the utility model discloses a water basicity detection device of other embodiments, first flow control unit and second flow control unit are the needle valve.
According to the utility model discloses a water basicity detection device of other embodiments, the test probe includes the pH electrode.
According to the utility model discloses a water basicity detection device of other embodiments, acidizing fluid container are equipped with first overflow mouth, and sample container is equipped with the second overflow mouth, and the export height that highly is higher than first flow control unit and first appearance pipe of first overflow mouth, the export height that highly is higher than second flow control unit and second appearance pipe of second overflow mouth, and all are less than the height of acidizing fluid feed liquor pipe and appearance liquid feed liquor pipe. Through setting up first overflow mouth and second overflow mouth, when acidizing fluid and appearance liquid got into acidizing fluid container and sample container with higher liquid level, the acidizing fluid and the sample that exceed first overflow mouth and second overflow mouth flow out by first overflow mouth and second overflow mouth respectively to make the liquid level height in acidizing fluid container and the sample container keep at the constant position, and then make the pressure in acidizing fluid container and the sample container keep invariable. Under constant pressure, the outflow speed of the acid solution and the sample solution can be controlled more accurately, so that the measured pH value is more accurate.
According to the utility model discloses a water basicity detection device of other embodiments, the acidizing fluid container still includes acidizing fluid feed liquor pipe, and the acidizing fluid container lets in standard acidizing fluid by acidizing fluid feed liquor pipe.
According to the utility model discloses a water basicity detection device of other embodiments, sample container still include appearance liquid feed liquor pipe, and sample container lets in the water sample by appearance liquid feed liquor pipe.
According to the utility model discloses a water basicity detection device of other embodiments still includes the display element, and the display element is connected with the test probe electricity. The detecting probe and the display unit are electrically connected with each other, so that the pH value detected by the detecting probe through a potentiometric method or other principles is displayed by the display unit through a mode such as digital display.
Drawings
Fig. 1 is a schematic structural diagram of a water alkalinity detecting device according to an embodiment of the present invention;
fig. 2 is a partial schematic view of a detection container of a water alkalinity detection apparatus according to another embodiment of the present invention.
Detailed Description
The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.
In the description of the embodiments of the present invention, if a feature is referred to as being "disposed", "fixed", "connected", or "mounted" on another feature, it can be directly disposed, fixed, or connected to the other feature or indirectly disposed, fixed, connected, or mounted on the other feature. In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Example 1
Referring to fig. 1, a schematic structural diagram of a water alkalinity detecting apparatus according to an embodiment of the present invention is shown. The water alkalinity detection device comprises a shell 150, wherein the shell 150 is divided into an upper layer and a lower layer, and the upper layer is provided with an acid liquid container 100 for containing standard acid liquid and a sample container 110 for containing a water sample. An acid liquor inlet pipe 101 is connected to the side surface of the acid liquor container 100, and an acid liquor regulating valve 102 for regulating the flow rate of the acid liquor is arranged on the acid liquor inlet pipe 101. The side of the sample container 110 is connected with a sample liquid inlet pipe 111, and the sample liquid inlet pipe 111 is provided with a sample liquid regulating valve 112 for regulating the flow of the sample. A first overflow outlet 105 is also provided on the other side of the acid container 100, and a second overflow outlet 115 is also provided on the other side of the sample container 110. The height of the first overflow port 105 is higher than the outlet heights of the first flow regulating unit 104 and the first sampling pipe 103, the height of the second overflow port 115 is higher than the outlet heights of the second flow regulating unit 114 and the second sampling pipe 113, and the heights of the second overflow port 115 and the second overflow port are both lower than the heights of the acid liquid inlet pipe 101 and the sample liquid inlet pipe 111, so that the liquid inlet level of the acid liquid and the liquid inlet level of the water sample are controlled to be higher than the liquid levels of the acid liquid container 100 and the sample container 110, which can be reached based on the first overflow port 105 and the second overflow port 115. When the acid solution and the sample solution enter the acid solution container 100 and the sample container 110 at a higher liquid level, the acid solution and the sample solution which are higher than the first overflow port 105 and the second overflow port 115 flow out from the first overflow port 105 and the second overflow port 105 respectively, so that the liquid level heights in the acid solution container 100 and the sample container 110 are kept at constant positions, and the pressure in the acid solution container 100 and the sample container 110 is kept constant. Under constant pressure, the outflow speed of the acid solution and the sample solution can be controlled more accurately, so that the measured pH value is more accurate. The bottom of the acid container 100 is connected to the detection container 120 at the lower layer of the housing 150 through a first sampling pipe 103, and the first flow rate adjustment unit 104 is disposed on the first sampling pipe 103. The bottom of the sample container 110 is connected to the detection container 120 through a second sample inlet pipe 113, and a second flow rate adjusting unit 114 is provided on the second sample inlet pipe 113. In this embodiment, the first flow rate adjustment unit 104 and the second flow rate adjustment unit 114 are both needle valves. The detection container 120 is disposed on a magnetic stirrer base of the magnetic stirrer 130, and a stirrer 131 is placed in the detection container 120 in advance. The side of the detection container 120 is further connected with a liquid outlet pipe 121, and a liquid outlet regulating valve 122 is arranged on the liquid outlet pipe 121. The detection container 120 is further provided with a pH electrode 141, the pH electrode 141 is connected with a display unit 140, and when the pH electrode 141 detects the pH of the mixed liquid in the detection container 120, the display unit 140 electrically connected with the pH electrode displays the detection result. Through the setting of acidizing fluid container 100 and sample container 110, add the acid to the water sample that awaits measuring that gets into detection container 120 and titrate in order to reduce the pH of water sample, survey the pH value of mixed liquid by pH electrode 141 of test probe afterwards, and then obtain the actual pH of water sample to avoid "sodium poor" to the influence of water sample pH test value, effectively improve the accuracy that detects, reduce the error. Meanwhile, the first sample injection pipe 103 and the second sample injection pipe 113 of the acid liquid container 100 and the sample container 110 flowing to the detection container 120 are respectively provided with the corresponding first flow regulating unit 104 and second flow regulating unit 114, so that the acid liquid and the sample can enter the detection container 120 for detection in a controllable range in a relatively constant amount, the pH detected by the pH electrode 141 of the detection probe can be guaranteed to fluctuate in a relatively small range, and the detection error is reduced.
An example of pH detection of the filtered liquid in the air flotation coagulation tank is now provided:
the acid solution container 100 contains standard acid solution, either sulfuric acid or hydrochloric acid, but hydrochloric acid is easy to volatilize under long-time standing condition to affect measurement, so that 0.05mol/L sulfuric acid solution (c) is selected hereH+0.1mol/L) as standard acid solution. The other end of the sample liquid inlet pipe 111 connected with the sample container 110 is communicated with the air flotation coagulation tank, so that the sample liquid in the sample container 110 is ensured to be approximately the same as the alkalinity in the air flotation coagulation tank. The detection container 120 is filled with standard acid solution from the acid solution container 100 and sample solution from the sample container 110, and a rotating magnetic field is applied by the magnetic stirrer 130 to drive the stirrer 131 to rotate, so that the mixed solution in the detection container 120 can be fully mixed.
It is clear that the pH electrode measures the most accurate pH at 7. The more the deviation from 7 is, the larger the error may be due to "acid difference", "alkali difference (sodium difference)" or the like.
According to the acid-base neutralization formula: h++OH-＝H2O，CAcid(s)VAcid(s)＝CAlkaliVAlkali；
Wherein C isAcid(s)H as standard acid solution+Concentration (mol/L); vAcid(s)Is the standard acid volume (L); cAlkaliOH as sample liquid-Concentration (mol/L); vAcid(s)Is the sample volume (L).
If the pH value of the solution in the air flotation coagulation tank is approximately controlled at 11, the pH value is 14+ lg [ C ]Alkali]Basic sample solution OH-Concentration CAlkali＝10pH-14＝1011-14＝10-3＝0.001mol/L，VAcid(s)/VAlkali＝CAlkali/CAcid(s)And (3) adjusting the first flow rate adjusting unit 104 on the acid liquid container 100 and the second flow rate adjusting unit 114 on the sample container 110 to make the volume ratio of the standard acid liquid to the sample liquid be 1: 100, respectively; the measured pH value fluctuates around 7, and the converted pH value of the sample solution has high accuracy.
If the pH value of the solution in the air flotation coagulation tank is approximately controlled at 13, alkaline sample solution OH-Concentration CAlkali＝10pH-14＝1013-14＝10-1＝0.1mol/L，VAcid(s)/VAlkali＝CAcid(s)/CAlkaliAt this time, the first flow rate adjusting unit 104 of the acid solution container 100 and the second flow rate adjusting unit 114 of the sample container 110 are adjusted to mix the standard acid solution and the basic sample solution in equal volumes.
Example 2
The water alkalinity detection device is different from the device in embodiment 1 in that the mixed liquid in the detection container is mixed in a compressed air mode. Referring to fig. 2, fig. 2 is a partial schematic view of a detection container of a water alkalinity detection apparatus according to another embodiment of the present invention. As shown in fig. 2, a standard acid solution and a sample solution are respectively introduced into the upper portion of the detection container 120 through the first sample inlet tube 103 and the second sample inlet tube 113, and a pH electrode 141 is fixed to the upper portion. One end of the lower side of the detection container 120 is connected with a liquid outlet pipe 121, and a liquid outlet regulating valve 122 is arranged on the liquid outlet pipe 121. The other end of the lower side of the detection container 120 is connected to an air flow pipe 200, and an air pump (not shown) is connected through the air flow pipe 200. The air flow channel 200 is also provided with an air flow regulating valve 201. Compressed air is introduced into the mixed solution in the detection container 120 by the air pump to realize thorough mixing of the mixed solution, so that the pH value can be conveniently measured, and the accuracy of the pH value can be ensured.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A water alkalinity detection device, characterized by, includes:
the acid liquor container is used for containing standard acid liquor;
the sample container is used for accommodating a water body sample;
the detection part comprises a detection container, a first sample injection pipe and a second sample injection pipe, the first sample injection pipe is used for communicating the acid liquid container with the detection container, the second sample injection pipe is used for communicating the sample container with the detection container, a first flow regulating unit is arranged on the first sample injection pipe, and a second flow regulating unit is arranged on the second sample injection pipe;
and the detection probe is arranged in the detection container and is used for detecting the pH value of the mixed liquid in the detection container.
2. The water alkalinity detecting device according to claim 1, further comprising a mixing unit for mixing the mixed liquid.
3. The device for detecting the alkalinity of the water body as claimed in claim 2, wherein the mixing unit is a magnetic stirring unit, the magnetic stirring unit comprises a magnetic stirrer and a stirrer, the magnetic stirrer is arranged at one end of the detection container, and the stirrer is positioned in the detection container and can be driven by the magnetic stirrer to perform rotary stirring.
4. The water alkalinity detecting device according to claim 1, wherein the first flow regulating unit and the second flow regulating unit are each independently selected from a needle valve, a stop valve, an angle valve, an electromagnetic valve, a butterfly valve, a ball valve, and a throttle valve.
5. The water alkalinity detecting device according to claim 4, wherein the first flow regulating unit and the second flow regulating unit are needle valves.
6. The water alkalinity detecting device according to claim 1, wherein the detecting probe comprises a pH electrode.
7. The water alkalinity detecting device according to claim 1, wherein the acid liquid container is provided with a first overflow port, the sample container is provided with a second overflow port, the first overflow port is higher than the first flow regulating unit and the outlet of the first sample inlet pipe, and the second overflow port is higher than the second flow regulating unit and the outlet of the second sample inlet pipe.
8. The device for detecting the alkalinity of a water body as claimed in any one of claims 1 to 7, wherein the acid container further comprises an acid liquid inlet pipe, and the acid container is introduced into the standard acid liquid through the acid liquid inlet pipe.
9. The device for detecting the alkalinity of the water body as claimed in any one of claims 1 to 7, wherein the sample container further comprises a sample liquid inlet pipe, and the sample container is introduced into the water body sample through the sample liquid inlet pipe.
10. The water alkalinity detection device according to any one of claims 1 to 7, further comprising a display unit, wherein the display unit is electrically connected with the detection probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922498750.7U CN211553849U (en) | 2019-12-31 | 2019-12-31 | Water alkalinity detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922498750.7U CN211553849U (en) | 2019-12-31 | 2019-12-31 | Water alkalinity detection device |
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| CN211553849U true CN211553849U (en) | 2020-09-22 |
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| CN201922498750.7U Active CN211553849U (en) | 2019-12-31 | 2019-12-31 | Water alkalinity detection device |
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Effective date of registration: 20220831 Address after: 518000 Room 201, building A, No. 1, Qian Wan Road, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong (Shenzhen Qianhai business secretary Co., Ltd.) Patentee after: Shenzhen Nipton Technology Co.,Ltd. Address before: 518000 310-315, third floor, kanghesheng building, No. 1 ChuangSheng Road, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen Trapure Environmental Technology Co.,Ltd. |
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