CN218653025U - Automatic distillation equipment for volatile pollutants in water - Google Patents
Automatic distillation equipment for volatile pollutants in water Download PDFInfo
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- CN218653025U CN218653025U CN202222600550.XU CN202222600550U CN218653025U CN 218653025 U CN218653025 U CN 218653025U CN 202222600550 U CN202222600550 U CN 202222600550U CN 218653025 U CN218653025 U CN 218653025U
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Abstract
The utility model discloses an automatic distillation device for volatile pollutants in water, which comprises a reagent quantifying system, a detection system and a distillation system; the detection system consists of a detection tank, a light source, a detection sensor and a reference sensor, the distillation system consists of a distillation tank, an anti-explosion boiling tube, a tee joint a, an air blowing pump and an air filter, light beams emitted by the light source are divided into two beams, one beam reaches the detection sensor through the detection tank, and is converted into an electric signal through an optical signal and is processed by a signal amplifier to be converted into a proper detection signal voltage value; the other beam directly reaches a reference detector, is converted into an electric signal by an optical signal, is processed by a signal amplifier and is converted into a proper reference signal voltage value, and the distillation end point is judged by the detected absorbance. The automatic distillation device for volatile pollutants in water can be used for automatically monitoring pollutants such as volatile phenol, cyanide and the like, and can also be used for automatically monitoring sulfides, fluorides, ammonia nitrogen, volatile organic compounds in water and the like.
Description
Technical Field
The utility model relates to a quality of water automatic monitoring field, in particular to automatic distillation plant of aquatic volatile pollutant.
Background
The automatic water quality monitoring instrument can automatically monitor the concentration of pollutants in the water body. Volatile phenol and cyanide are important indexes for measuring water quality. The total phenol in the water exists in the form of volatile phenol and non-volatile phenol, and the volatile phenol must be distilled out of a water sample for measurement and separated from the non-volatile phenol, the interfering substances and the fixing agent for measurement. Cyanide in water often exists in the form of a complex with the metal and is difficult to measure directly because a stronger complexing agent must be added to the water sample to dissociate the cyanide and convert it to hydrogen cyanide which distills off before it can be measured.
At present, manual distillation of volatile phenol and cyanide in water is visually quantified, and distillation is stopped after distillate reaches a set volume. The distillation process in the automatic monitoring instrument mainly adopts timing distillation, namely heating distillation for a fixed time, but due to altitude change, air pressure change and water sample component change, the boiling points of mixed liquid are different, the distillation time is the same, and the distillate quantity has a certain difference. In addition, because the fixed temperature distillation is set in the program, but the distillation target temperature is often lower in consideration of the low boiling point of a high-altitude area and the fact that the high temperature cannot be heated; however, when the method is applied to a low-altitude area, the distillation target temperature is set to be lower than the boiling point, so that part of the contaminants cannot be completely distilled out.
There is a water quality on-line detection analytical equipment and method, publication No. CN104597261B, including control module, advance kind module, flow path switching module, the water quality on-line analytical equipment further includes: the distillation module comprises a distillation tank, a cooler, a condenser and a condensation pipeline, wherein an anti-bumping pipe is arranged in the distillation tank, and an outlet of the condensation pipeline extends into the sample distillation tank and is in non-sealing connection with the sample distillation tank; the detection module comprises a sample distillation tank, a light source and a detector, wherein the sample distillation tank receives distilled liquid and is used as a color development tank and a detection tank; and the light source and the detector judge the distillation end point and perform constant volume on the distillate. The invention also discloses a water quality on-line analysis method. The invention has the advantages of simple structure, high automation degree, good reliability and the like. However, if the device is used in different altitudes, the device can easily cause that the device cannot be heated to the local boiling temperature, and the light source of the device is a single light path, so that the distillate quantity of each distillation is unstable.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an automatic distillation plant of aquatic volatile pollutant solves not enough among the above-mentioned prior art scheme, not only can be used to volatilize the automatic monitoring of pollutants such as phenol, cyanide, also can be used to the automatic monitoring of sulphide, fluoride, ammonia nitrogen, aquatic Volatile Organic Compounds (VOCs) etc..
In order to achieve the above object, the utility model provides a following technical scheme:
an automatic distillation apparatus for volatile contaminants in water, comprising:
a reagent quantification system, a detection system, a distillation system;
the detection system comprises a detection tank, a light source and a sensor, wherein the light source is arranged on one side of the detection tank, the light beam of the light source passes through the sensor, the distillation end point is judged according to the detected absorbance, and an inlet at the bottom of the detection tank is connected with a first outlet of the reagent quantifying system through a pipeline;
the distillation system consists of a distillation tank, an anti-explosion boiling pipe, a tee joint a, an air blowing pump and an air filter, wherein the bottom inlet of the distillation tank is connected with the first end of the tee joint a, the air blowing pump is connected with the second end of the tee joint a, the third end of the tee joint a is connected with the second outlet of the reagent quantifying system, and the top outlet of the distillation tank is connected with one end of the detection tank through a pipeline;
the sensor comprises a detection sensor and a reference sensor, the light source and the detection sensor are oppositely arranged on two sides of the detection tank, the reference sensor and the detection tank are oppositely arranged on two sides of the light source, light beams emitted by the light source are divided into two beams, one beam reaches the detection sensor through the detection tank, and the other beam directly reaches the reference detector.
The detection system further comprises a tee joint b, an inlet at the bottom of the detection tank is connected with a first end of the tee joint b, an outlet at the top of the distillation tank is connected with a second end of the tee joint b through a pipeline, and a third end of the tee joint b is connected with a first outlet of the reagent quantifying system through a pipeline.
The distillation system further comprises a condenser, wherein an outlet at the top of the distillation tank is connected with an inlet at the top of the detection tank through a pipeline, and the pipeline passes through the condenser.
The distillation system also comprises a three-way valve, wherein the top outlet of the distillation retort is connected with the second end of the three-way valve b through a pipeline, and the pipeline passes through the three-way valve.
The distillation retort external surface is twined with the resistance wire, still includes the temperature sensor of embedding installation, and wherein temperature control adopts PID algorithm control.
The anti-explosion boiling tube is made of high-temperature-resistant and corrosion-resistant materials.
The high temperature resistant, corrosion resistant material comprises PTFE or PEEK.
The air filter is internally filled with alkaline particle materials, and can filter air pumped by the air blowing pump and absorb trace components to be detected in the air.
The alkaline particulate material is soda lime.
The utility model provides a pair of automatic distillation plant of aquatic volatile pollutant beneficial effect lies in:
1. through the distillation temperature judgment algorithm, the constant temperature of distillation is realized, namely the solution boiling point temperature corresponding to the local altitude, the application problem of the distillation temperature built in the program of the automatic monitoring instrument for the volatile pollutants in water in different altitude areas is effectively solved, and the local boiling point temperature can be always heated in the distillation process.
2. The method is different from one-time judgment of timing distillation, realizes real-time circulation judgment of the distillation end point through a distillation end point judgment algorithm and double-optical-path optical detection metering, and enables the distillate quantity of each distillation to be more stable.
3. The automatic distillation device for the volatile pollutants in water can be used for automatically monitoring the pollutants such as volatile phenol, cyanide and the like, and can also be used for automatically monitoring sulfides, fluorides, ammonia nitrogen, volatile Organic Compounds (VOCs) in water and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram of an automatic distillation apparatus for volatile contaminants in water according to embodiment 1 of the present invention;
FIG. 2 is a diagram of an automatic distillation apparatus for volatile contaminants in water according to embodiment 2 of the present invention;
in the figure: 1. a reagent dosing system; 2. a light source; 3. a detection sensor; 4. a reference sensor; 5. a detection tank; 6. a distillation tank; 7. an anti-bumping tube; 8. a tee joint a; 9. an air blowing pump; 10. an air filter; 11. a condenser; 12. a tee joint b; 13. and a three-way valve.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
Example 1
This embodiment provides an automatic distillation equipment of aquatic volatile pollutant for the distillation of aquatic volatile phenol:
an automatic distillation device for volatile pollutants in water comprises a reagent quantifying system 1, a detection system and a distillation system;
the reagent quantifying system 1 comprises a pump, a valve, a pipeline and the like. The pump is one of a peristaltic pump, a diaphragm pump, an injection pump, a plunger pump and the like; the valve is one or more of an electromagnetic valve, a rotary valve and the like; the pipeline is a corrosion-resistant and high-temperature-resistant pipeline.
The detection system consists of a detection tank 5, a light source 2 and a sensor, wherein the light source 2 is arranged on one side of the detection tank 5, a light beam of the light source 2 passes through the sensor, a distillation end point is judged according to the detected absorbance, and an inlet at the bottom of the detection tank 5 is connected with a first outlet of the reagent quantifying system 1 through a pipeline; the light beam emitted by the light source 2 is divided into two beams, one beam reaches the detection sensor 3 through the detection tank 5, is converted into an electric signal through an optical signal, is processed by the signal amplifier and is converted into a proper detection signal voltage value; the other beam directly reaches the reference detector 4, is converted into an electric signal by an optical signal, is processed by a signal amplifier and is converted into a proper reference signal voltage value.
The detection absorbance calculation method is that the logarithm is taken to the ratio of the voltage value of the reference signal to the voltage value of the detection signal.
Distillation system comprises retort 6, explosion-proof boiling tube 7, tee bend a8, air-blowing pump 9, air cleaner 10, condenser 11, 6 bottom entry of retort are connected with the first end of tee bend a8, air-blowing pump 9 is connected with tee bend a8 second end, and tee bend a8 third end is connected 1 second export of reagent ration system, 6 top exports of retort with 5 top entries of detection jar pass through the tube coupling, and the pipeline passes through condenser 11.
The outer surface of the distillation retort 6 is wound with a resistance wire and is provided with a temperature sensor which is embedded and installed, and the heating temperature control adopts PID algorithm control.
The anti-bumping tube 7 is made of high temperature resistant and corrosion resistant materials, including but not limited to PTFE, PEEK material, etc.
The air filter 10 is filled with a soda lime particle material and can filter air pumped by the air blowing pump, absorb trace components to be detected in the air and prevent background interference.
The embodiment also provides an automatic distillation method for volatile pollutants in water, which adopts the automatic distillation equipment for volatile pollutants in water, and comprises the following steps:
(1) And quantitatively adding a water sample and an acid for promoting volatilization into the distillation retort 6 through the reagent quantitative system 1.
(2) And starting the light source 2 and collecting initial detection absorbance.
(3) The distillation tank 6 is heated to the distillation temperature through a distillation temperature judgment algorithm, the air blowing pump 9 starts to blow air, volatile phenol is blown off through distillation, and the volatile phenol and distilled water are condensed into liquid after passing through the condenser 11 and then drip into the detection tank 5.
(4) And continuously judging the distillation end point through a distillation end point judgment algorithm, and stopping air blowing by the air blowing pump 9 and stopping heating the distillation tank 6 when the distillation end point is reached.
The distillation temperature judgment algorithm is as follows:
(1) The system set the distillation heating target temperature to 100 ℃.
(2) And the temperature sensor detects the distillation temperature in real time, when the distillation temperature does not exceed the highest point of the previous value in the distillation period within 1 minute, the highest point of the previous value is set as the distillation temperature of the current distillation, and the temperature is kept constant at the distillation temperature through a PID algorithm.
The distillation end point judgment algorithm is as follows:
(1) The distillation end point is judged as the cycle judgment.
(2) In one cycle, the air-blowing pump 9 blows air for 1 second, stands for 1 second, and collects the detection absorbance once.
(3) And under the condition of jumping out circulation, judging that the difference value between the current detection absorbance and the initial detection absorbance is greater than a preset threshold value, and judging that the distillation end point is reached.
The preset threshold may be calculated according to the following method: and (3) continuously distilling without setting a terminal point in the distillation process, and recording a detection absorbance change curve in the distillation process until the liquid level is completely higher than the light path.
Example 2
This embodiment provides an automatic distillation equipment of volatile pollutant in water, is used for the distillation of aquatic cyanide:
an automatic distillation device for volatile pollutants in water comprises a reagent quantifying system 1, a detection system and a distillation system;
the reagent quantifying system 1 comprises a pump, a valve, a pipeline and the like. The pump is one of a peristaltic pump, a diaphragm pump, an injection pump, a plunger pump and the like; the valve is one or more of an electromagnetic valve, a rotary valve and the like; the pipeline is a corrosion-resistant and high-temperature-resistant pipeline.
The detection system comprises a detection tank 5, a light source 2, a sensor and a tee joint b12, wherein the light source 2 is arranged on one side of the detection tank 5, a light beam of the light source 2 passes through the sensor, and a distillation end point is judged through detected absorbance, an inlet at the bottom of the detection tank 5 is connected with a first outlet of the reagent quantifying system 1 through a pipeline, an inlet at the bottom of the detection tank 5 is connected with a first end of the tee joint b12, an outlet at the top of the distillation tank 6 is connected with a second end of the tee joint b12 through a pipeline, and a third end of the tee joint b12 is connected with the reagent quantifying system 1 through a pipeline; the light beam emitted by the light source 2 is divided into two beams, one beam reaches the detection sensor 3 through the detection tank 5, is converted into an electric signal through an optical signal, is processed by the signal amplifier and is converted into a proper detection signal voltage value; the other beam directly reaches the reference detector 4, is converted into an electric signal by an optical signal, is processed by a signal amplifier and is converted into a proper reference signal voltage value.
The detection absorbance calculation method is that the logarithm is taken to the ratio of the voltage value of the reference signal to the voltage value of the detection signal.
Distillation system comprises retort 6, explosion-proof boiling pipe 7, tee bend a8, air-blowing pump 9, air cleaner 10, three- way valve 13, 6 bottom entrances of retort are connected with the first end of tee bend a8, air-blowing pump 9 with tee bend a8 second end be connected, tee bend a8 third end is connected 1 second export of reagent ration system, retort 6's top export and tee bend b12 second end pass through the tube coupling, the pipeline passes through three-way valve 13.
The outer surface of the distillation retort 6 is wound with a resistance wire and is provided with a temperature sensor which is embedded and installed, and the heating temperature control adopts PID algorithm control.
The anti-bumping tube 7 is made of high temperature resistant and corrosion resistant materials, including but not limited to PTFE, PEEK material, etc.
The air filter 10 is filled with a soda lime particle material and can filter air pumped by the air blowing pump, absorb trace components to be detected in the air and prevent background interference.
The embodiment also provides an automatic distillation method for volatile pollutants in water, which adopts the automatic distillation equipment for volatile pollutants in water, and comprises the following steps:
(1) Quantitatively adding a water sample, an acid for promoting volatilization and EDTA (ethylene diamine tetraacetic acid) with stronger complexing capacity than cyanide into the distillation tank 6 through the reagent quantitative system 1; sodium hydroxide absorbent was quantitatively added to the test tank 5.
(2) And starting the light source 2 and collecting initial detection absorbance.
(3) The distillation tank 6 is heated to the distillation temperature through a distillation temperature judgment algorithm, the air blowing pump 9 starts air blowing, cyanide is blown off through distillation, and gaseous cyanide and water vapor enter the detection tank 5 through the three-way valve 13 and the three-way valve b12 and are absorbed by sodium hydroxide absorption liquid.
(4) And continuously judging the distillation end point by a distillation end point judgment algorithm, stopping air blowing by the air blowing pump 9 when the end point is reached, stopping heating the distillation tank 6, and switching the three-way valve 13 from the communication detection tank 5 to the communication air.
The distillation temperature judgment algorithm is as follows:
(1) The system set the distillation heating target temperature to 100 ℃.
(2) And the temperature sensor detects the distillation temperature in real time, when the distillation temperature does not exceed the highest point of the previous value in the distillation period within 1 minute, the highest point of the previous value is set as the distillation temperature of the current distillation, and the temperature is kept constant at the distillation temperature through a PID algorithm.
The distillation end point judgment algorithm is as follows:
(1) The distillation end point is judged as the cycle judgment.
(2) In one cycle, the air-blowing pump 9 blows air for 1 second, stands for 1 second, and collects the detection absorbance once.
(3) And under the condition of jumping out circulation, judging that the difference value between the current detection absorbance and the initial detection absorbance is greater than a preset threshold value, and judging that the distillation end point is reached.
The preset threshold may be calculated according to the following method: and continuously distilling without setting a terminal point in the distillation process, and recording a detection absorbance change curve in the distillation process until the liquid level is completely higher than the light path.
The above-mentioned embodiments further explain in detail the technical problems, technical solutions and advantages solved by the present invention, and it should be understood that the above only is a specific embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An automatic distillation equipment for volatile pollutants in water, which is characterized by comprising: a reagent quantification system (1), a detection system, and a distillation system;
the detection system consists of a detection tank (5), a light source (2) and a sensor, wherein the light source (2) is arranged on one side of the detection tank (5), a light beam of the light source (2) passes through the sensor, a distillation end point is judged according to the detected absorbance, and an inlet at the bottom of the detection tank (5) is connected with a first outlet of the reagent quantification system (1) through a pipeline;
distillation system comprises retort (6), anti-explosion boiling pipe (7), tee bend a (8), air-blowing pump (9), air cleaner (10), retort (6) bottom entry is connected with tee bend a (8) first end, air-blowing pump (9) and tee bend a (8) second end are connected, and tee bend a (8) third end is connected reagent ration system (1) second export, the top export of retort (6) with detect jar (5) one end and pass through the tube coupling.
2. The automatic distillation equipment for the volatile pollutants in water as claimed in claim 1, wherein the sensor comprises a detection sensor (3) and a reference sensor (4), the light source (2) and the detection sensor (3) are oppositely arranged at two sides of the detection tank (5), the reference sensor (4) and the detection tank (5) are oppositely arranged at two sides of the light source (2), wherein the light beam emitted by the light source (2) is divided into two beams, one beam passes through the detection tank (5) to reach the detection sensor (3), and the other beam directly reaches the reference sensor (4).
3. The automatic distillation equipment for volatile pollutants in water as claimed in claim 1 or 2, wherein the detection system further comprises a tee joint b (12), the inlet at the bottom of the detection tank (5) is connected with the first end of the tee joint b (12), the outlet at the top of the distillation tank (6) is connected with the second end of the tee joint b (12) through a pipeline, and the third end of the tee joint b (12) is connected with the first outlet of the reagent quantitative system (1) through a pipeline.
4. The automatic distillation equipment for volatile pollutants in water as claimed in claim 1 or 2, wherein the distillation system further comprises a condenser (11), the top outlet of the distillation tank (6) is connected with the top inlet of the detection tank (5) through a pipeline, and the pipeline passes through the condenser (11).
5. The automatic distillation equipment for volatile pollutants in water as claimed in claim 3, wherein the distillation system further comprises a three-way valve (13), and the top outlet of the distillation tank (6) is connected with the second end of the three-way valve b (12) through a pipeline which passes through the three-way valve (13).
6. The automatic distillation equipment for the volatile pollutants in the water as claimed in claim 1, wherein the outer surface of the distillation tank (6) is wound with a resistance wire, and the automatic distillation equipment further comprises a temperature sensor which is installed in an embedded mode, wherein the temperature control is controlled by a PID algorithm.
7. The automatic distillation equipment for volatile pollutants in water as claimed in claim 1, wherein the anti-explosion boiling tube (7) is made of high temperature and corrosion resistant material.
8. The apparatus of claim 7, wherein the high temperature resistant, corrosion resistant material comprises PTFE or PEEK.
9. The automatic distillation equipment for volatile pollutants in water as claimed in claim 1, wherein the air filter (10) is filled with alkaline granular materials, and can filter the air pumped by the air blower to absorb the trace components to be detected in the air.
10. The apparatus of claim 9, wherein the alkaline particulate material is soda lime.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222600550.XU CN218653025U (en) | 2022-09-29 | 2022-09-29 | Automatic distillation equipment for volatile pollutants in water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222600550.XU CN218653025U (en) | 2022-09-29 | 2022-09-29 | Automatic distillation equipment for volatile pollutants in water |
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| CN218653025U true CN218653025U (en) | 2023-03-21 |
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| CN202222600550.XU Active CN218653025U (en) | 2022-09-29 | 2022-09-29 | Automatic distillation equipment for volatile pollutants in water |
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