CN109991385B - Water quality detection system - Google Patents
Water quality detection system Download PDFInfo
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- CN109991385B CN109991385B CN201711486787.7A CN201711486787A CN109991385B CN 109991385 B CN109991385 B CN 109991385B CN 201711486787 A CN201711486787 A CN 201711486787A CN 109991385 B CN109991385 B CN 109991385B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 127
- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 150000002500 ions Chemical class 0.000 claims abstract description 88
- 229910001385 heavy metal Inorganic materials 0.000 claims abstract description 67
- 239000005416 organic matter Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000000926 separation method Methods 0.000 claims description 134
- 230000005684 electric field Effects 0.000 claims description 98
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000012372 quality testing Methods 0.000 claims 5
- 150000001768 cations Chemical class 0.000 abstract description 17
- -1 silver ions Chemical class 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 150000001450 anions Chemical class 0.000 description 4
- 239000011575 calcium Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- WLZRMCYVCSSEQC-UHFFFAOYSA-N cadmium(2+) Chemical compound [Cd+2] WLZRMCYVCSSEQC-UHFFFAOYSA-N 0.000 description 3
- 229910001424 calcium ion Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- 229910001422 barium ion Inorganic materials 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
-
- 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
- G01N33/18—Water
- G01N33/1813—Specific cations in water, e.g. heavy metals
-
- 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
- G01N33/18—Water
- G01N33/1826—Organic contamination in water
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/40—Concentrating samples
- G01N2001/4038—Concentrating samples electric methods, e.g. electromigration, electrophoresis, ionisation
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to a water quality detection system, which comprises an organic matter detection sensor, a water quality detection system and a water quality detection system, wherein the organic matter detection sensor is used for detecting the content of organic matters in water; the method is characterized in that: the device also comprises a heavy metal ion detection device capable of detecting whether the water contains heavy metal ions. Compared with the prior art, the invention has the advantages that: the device can detect the content of organic matters in water, separate and split cations with different specific charges in water by arranging the heavy metal ion detection device, and detect the TDS value of water at the outlet of one splitter according to the specific charges of the heavy metal ions, so that whether the water contains the heavy metal ions can be accurately and effectively detected.
Description
Technical Field
The invention relates to a water quality detection system.
Background
At present, the pollution of water quality is mainly concentrated in 2 most parts, one major type is inorganic heavy metal ion concentration, and the other major type is organic matter COD concentration. At present, the content of organic matters in water is generally detected by an organic matter sensor, and whether the water contains heavy metal ions is generally judged by measuring the TDS value in the water, but the TDS value cannot accurately indicate whether the water contains the heavy metal ions.
Disclosure of Invention
The invention aims to solve the technical problem of providing a water quality detection system which not only can detect the content of organic matters in water, but also can judge whether the water contains heavy metal ions more sensitively.
The technical scheme adopted for solving the technical problems is as follows: a water quality detection system comprises an organic matter detection sensor for detecting the organic matter content in water; the method is characterized in that: the device also comprises a heavy metal ion detection device capable of detecting whether the water contains heavy metal ions, and the heavy metal ion detection device comprises
A separation flow path including an inlet and an outlet;
the auxiliary current field positive plate is arranged in the separation flow channel and is close to the inlet of the separation flow channel and is electrically connected with the positive electrode of the first external stabilized voltage supply;
the auxiliary collector field negative plate is arranged in the separation flow channel, is close to the inlet of the separation flow channel, is electrically connected with the negative electrode of the first external stabilized power supply, is opposite to the auxiliary collector field positive plate and is arranged at intervals in parallel, and the distance between the auxiliary collector field positive plate and the auxiliary collector field negative plate is d;
the separation electric field positive plate is arranged in the separation flow channel, is close to the outlet of the separation flow channel, is in the same straight line with the auxiliary electric field negative plate, is connected with the positive electrode of the second external stabilized voltage supply, and has a D distance from the rear end part of the auxiliary electric field negative plate, wherein D is larger than 0; the first external regulated power supply is a pulse regulated voltage.
The separation electric field negative plate is arranged in the separation flow channel, is close to the outlet of the separation flow channel, is in the same straight line with the auxiliary electric field positive plate, is connected with the negative electrode of the second external stabilized voltage supply, and has a D distance from the rear end part of the auxiliary electric field positive plate, wherein D is larger than 0;
the outlet of the separation flow channel is provided with N flow dividing baffles which are arranged in parallel and at intervals with the positive plate of the separation electric field, so that the outlet of the separation flow channel is divided into N+1 flow dividing sub outlets, and the value of N is a natural number greater than or equal to 2; taking water flowing out from one diverter outlet positioned at the middle or any one of two diverter outlets positioned at the middle as first water outlet of the heavy metal ion detection device; mixing water flowing out of the outlets of the other shunts to serve as second water outlet of the heavy metal ion detection device;
and the TDS sensor is used for detecting the TDS value in the first effluent, and the detection value of the TDS sensor is used as the basis for judging whether the water contains heavy metal ions or not.
The distances between the N flow dividing baffles can be the same, namely the N flow dividing baffles divide the outlet of the separation flow channel into N+1 flow dividing sub outlets with the same size.
The distance between the N split separators may also be different, and preferably, n=2, where the distance between the first split separator and the positive plate of the separation electric field is:wherein K is smallThe constant of more than 0 is 1, U is the voltage between the positive electrode and the negative electrode of the second external stabilized voltage power supply, l is the length of the positive electrode plate or the negative electrode plate of the separation electric field, v is the water flow speed of water flowing through the separation flow channel, and d is the distance between the positive electrode plate and the negative electrode plate of the separation electric field;the range of (2) is 1/15-1/8; the distance between the second block of shunt separator and the positive plate of the separation electric field is as follows:
the range of (2) is 1/45-1/40; taking water flowing out of a splitter outlet formed between the first splitter baffle and the second splitter baffle as first effluent of the heavy metal ion detection and separation device; mixing water flowing out of the outlets of the other two flow splitters to serve as second water outlet of the heavy metal ion detection and separation device; thus, if the water contains silver ions, cadmium ions, barium ions, mercury ions, lead ions and other metal cations with the ratio of 1/15-1/8 to 1/45-1/40, the TDS value of the first effluent can be detected, and if the TDS value is larger than a preset threshold value, the first effluent is used as the wastewater of the water purifier, and the second effluent is used as the normal effluent of the water purifier.
As another preferable aspect, the n=3, wherein a distance between the first split separator and the positive electrode plate of the separation electric field is:wherein K is a constant smaller than 1 and larger than 0, U is the voltage between the anode and the cathode of the second external stabilized power supply, l is the length of the positive plate of the separation electric field or the negative plate of the separation electric field, v is the water flow speed of water flowing through the separation flow channel, and d is the distance between the positive plate of the separation electric field and the negative plate of the separation electric field; />The range of (2) is 1/15-1/8; the distance between the second block of shunt separator and the positive plate of the separation electric field is as follows: />The range of (2) is 1/28-1/20; the distance between the third shunt separator and the positive plate of the separation electric field is as follows:
the range of (2) is: 1/45-1/40, taking water flowing out from a splitter outlet formed between the second splitter baffle and the third splitter baffle as first water outlet of the heavy metal ion detection and separation device; mixing water flowing out of the outlets of the other three flow splitters to serve as second water outlet of the heavy metal ion detection and separation device; thus, the metal cations with the ratios of mercury ions, lead ions and the like between 1/28-1/20 and 1/45-1/40 can be detected through the TDS value of the first effluent, and if the TDS value is larger than a preset threshold value, the first effluent is used as the wastewater of the water purifier, and the second effluent is used as the normal effluent of the water purifier.
In order to effectively collect and effectively release ions, in the pulse type voltage stabilizing voltage of the first external voltage stabilizing power supply, the pressurizing time is smaller than the non-pressurizing time, namely the duty ratio of the pulse type voltage stabilizing voltage is smaller than 50%.
Considering that the electrolysis of water is easy to be caused when the voltages of the attached electric field and the separated electric field are too large, the voltage between the positive electrode and the negative electrode of the first external stabilized power supply is less than or equal to 2V when the first external stabilized power supply is pressurized so as not to electrolyze the water; the voltage between the anode and the cathode of the second external stabilized power supply is less than or equal to 2V.
Preferably, the length of the negative electrode plate of the separation electric field is the same as the length of the positive electrode plate of the separation electric field, and the length of the negative electrode plate of the separation electric field is D.
The inlet of the separation flow channel is arranged between the front end part of the auxiliary current field positive plate and the front end part of the auxiliary current field negative plate or between the front end part of the auxiliary current field positive plate and the front end of the auxiliary current field negative plate to form the inlet of the separation flow channel; and an outlet of the separation flow channel is formed between the rear end part of the separation electric field positive plate and the rear end part of the separation electric field negative plate.
The invention further comprises a display screen electrically connected with the organic matter detection sensor and the TDS sensor in the heavy metal ion detection device.
And the outlet of the flowmeter is communicated with the inlet of a separation flow channel in the heavy metal ion detection device, and the flowmeter is also electrically connected with the display screen.
And a second TDS sensor is also connected between the outlet of the organic matter detection sensor and the inlet of the flowmeter, and the second TDS sensor is also electrically connected with the display screen.
Compared with the prior art, the invention has the advantages that: the device can detect the content of organic matters in water, separate and split cations with different specific charges in water by arranging the heavy metal ion detection device, and detect the TDS value of water at the outlet of one splitter according to the specific charges of the heavy metal ions, so that whether the water contains the heavy metal ions can be accurately and effectively detected.
Drawings
Fig. 1 is a schematic diagram of a water quality detecting system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a heavy metal ion detection device according to an embodiment of the invention.
Fig. 3 is a schematic diagram of a heavy metal ion detection device in a second embodiment of the invention.
Fig. 4 is a schematic diagram of a heavy metal ion detection device in a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
The water quality detection system shown in fig. 1 comprises an organic matter detection sensor 8 for detecting the content of organic matters in water, a heavy metal ion detection device capable of detecting whether heavy metal ions are contained in the water, and a display screen 9 electrically connected with the organic matter detection sensor 8 and a TDS sensor 7 in the heavy metal ion detection device; the water inlet of the water quality detection system is communicated with the inlet of the organic matter detection sensor, the outlet of the organic matter detection sensor is communicated with the inlet of the flowmeter 10, the outlet of the flowmeter 10 is communicated with the inlet of the separation flow channel in the heavy metal ion detection device, and the flowmeter 10 is also electrically connected with the display screen 9; a second TDS sensor 11 may also be connected between the outlet of the organic matter detection sensor and the inlet of the flow meter, which second TDS sensor 11 is also electrically connected with the display screen 9.
The structure of the organic matter detecting sensor adopts a conventional structure in the prior art, and in this embodiment, the structure described in patent No. 201720316550.3 is adopted, and will not be described in detail here.
In this embodiment, the heavy metal ion detection device includes, as shown in FIG. 2
A separation flow channel 1 comprising an inlet and an outlet;
the auxiliary current field positive plate 2 is arranged in the separation flow channel, is close to the inlet of the separation flow channel and is electrically connected with the positive electrode of the first external stabilized voltage supply;
the auxiliary collector field negative plate 3 is arranged in the separation flow channel, is close to the inlet of the separation flow channel, is electrically connected with the negative electrode of the first external stabilized power supply, is opposite to the auxiliary collector field positive plate and is arranged in parallel at intervals, and the distance between the auxiliary collector field positive plate and the auxiliary collector field negative plate is d; the first external stabilized voltage supply is a pulse stabilized voltage;
the separation electric field positive plate 4 is arranged in the separation flow channel, is close to the outlet of the separation flow channel, is in the same straight line with the auxiliary electric field negative plate, is connected with the positive electrode of the second external stabilized voltage supply, and has a D distance from the rear end part of the auxiliary electric field negative plate, wherein D is larger than 0;
the separation electric field negative plate 5 is arranged in the separation flow channel, is close to the outlet of the separation flow channel, is in the same straight line with the auxiliary electric field positive plate, is connected with the negative electrode of the second external stabilized voltage supply, and has a D distance from the rear end part of the auxiliary electric field positive plate, wherein D is larger than 0;
the outlet of the separation flow channel is provided with N flow dividing baffle plates 6 which are arranged in parallel and uniformly at intervals with the separation electric field negative electrode plate 5, so that the outlet of the separation flow channel is divided into N+1 flow dividing sub outlets with the same capacity, the value of N is a natural number greater than or equal to 2, and water flowing out from one flow dividing sub outlet positioned at the middle or any one flow dividing sub outlet positioned at the two flow dividing sub outlets at the middle is used as first water outlet of the heavy metal ion detection separation device; mixing water flowing out of the outlets of the other flow splitters to be used as second water outlet of the heavy metal ion detection and separation device;
and a TDS sensor 7 for detecting the TDS value in the first effluent, wherein the detection value of the TDS sensor is used as the basis of whether the water contains heavy metal ions, and the water contains the heavy metal ions as long as the detection value of the TDS sensor is non-zero.
In this embodiment, n=3, the split separator between the negative electrode plate of the separation electric field and the positive electrode plate of the separation electric field is sequentially denoted as a first split separator, a second split separator, and a third split separator, and water flowing out from the split sub outlet formed between the second split separator and the third split separator is used as the first effluent of the heavy metal ion detection separation device; mixing water flowing out of the outlets of the other three flow splitters to serve as second water outlet of the heavy metal ion detection and separation device; .
The working principle of the heavy metal ion detection device is as follows:
water enters from an inlet of the separation flow channel, and under the action of an attached electric field, positive ions in the water are attached to the vicinity of the negative plate of the attached electric field, and negative ions in the water are attached to the vicinity of the positive plate of the attached electric field; the auxiliary electric field adopts pulse voltage, ions in water are attached when the voltage is applied, and anions and cations attached near the positive and negative plates of the auxiliary electric field are released and enter a separation electric field of subsequent ions when the voltage is not applied (when power is off); the separation and the attachment of anions and cations can be effectively carried out as long as the strength of the attached electric field, the pulse time, the spacing between the pole pieces and the water flow speed are matched, so that the initial positions of all charged ions are consistent (cations are near the cathode pieces); since different ions have different charges and different atomic weights, the main cations in normal water are mostly calcium (Ca 2 20 + \atomic weight), magnesium (Mg 2 Ion atomic weight 20), sodium (Na + \atomic weight 11), and some other trace cations; but for some contaminated waters, especially heavy goldThe contaminated water contains a large amount of heavy metal ions such as lead (Pb) 2 An atomic weight of 82), mercury (Hg) 2 80 + \atomic weight), silver (Ag 2 An atomic weight of 47), barium (Ba) 2 56 + \atomic weight), cadmium (Cd) 2 An atomic weight of 48), and the like. Different ions have different specific charges, such as calcium ion with a specific charge of 2/20, cadmium ion with a specific charge of 2/48 and lead ion with a specific charge of 2/82, so that the specific charge of heavy metal ions is relatively small, especially lead, mercury and the like, while common cations in general water such as calcium, magnesium, sodium and the like have relatively large specific charges. Under the conditions of the same separation electric field and the same initial speed, the distance relation of the movement of ions with different charges is in a proportional relation with the ratio of the charges, namely the distance of the movement is related to q/m, and under the same electric field, the movement speed of the ions with smaller charges is slow, so that the heavy metal positive ions with smaller charges can be ensured to be fully attached to the positive plate as long as the heavy metal positive ions with larger charges are ensured to be attached to the vicinity of the positive plate, and the effect of full attachment can be achieved; the time of pulse power supply attachment (voltage attachment) is considered in consideration of the effective attachment and the factors of effective ion release<Release time (no voltage applied); since the electrolysis of water is easily caused by an excessively high voltage, the input additional field voltage and the separation field voltage should not be excessively large, and should be generally lower than 2V or less.
The same electric field is different for different ion migration capacities, and is mainly determined according to different charge ratios, ions enter a separation electric field under the drive of water flow under the same uniform electric field, cations are near an auxiliary electric field negative plate due to the effect of a previous auxiliary electric field, so that initial conditions of the cations are consistent, different ions in water can migrate under the effect of the separation electric field, the anions move towards a separation electric field positive plate, and the cations move towards a separation electric field negative plate, but offset distances of the different ions are different due to different specific charges. When calcium and magnesium ions in water reach the vicinity of the negative electrode plate of the ion separation electric field when the water is near the water outlet, heavy metal ions are relatively small in specific charge and low in moving speed, so that the heavy metal ions are positioned in other places, water is split through the splitter box of the water outlet, different anions and cations in the water can be separated, and water flowing out from the splitter outlet formed between the second splitter plate and the third splitter plate is used as first water outlet of the heavy metal ion detection and separation device; mixing water flowing out of the outlets of the other three flow splitters to serve as second water outlet of the heavy metal ion detection and separation device, so that most heavy metal ions can be separated and detected, and whether the water contains heavy metal ions can be judged by detecting the TDS value in the first water; of course, the detection value of the TDS sensor may be compared with the value of the second TDS sensor, so long as the two values are different, the water may also be indicated to contain heavy metal ions, and the heavy metal ions may be displayed through a display screen. In order to prevent the influence of the auxiliary electric field on the ion separation electric field, a certain distance is required for 2 electric fields, namely, a D distance is not arranged between the front end of the positive plate of the separation electric field and the rear end of the negative plate of the auxiliary electric field, D is larger than 0, the length of the negative plate of the separation electric field is the same as that of the positive plate of the separation electric field, and D is preferably the same as that of the negative plate of the separation electric field.
Example two
Unlike the first embodiment, the three split partitions are not uniformly spaced apart, as shown in FIG. 3, wherein
The distance between the first shunt separator and the positive plate of the separation electric field is as follows:
wherein K is a constant smaller than 1 and larger than 0, U is the voltage between the anode and the cathode of the second external stabilized power supply, l is the length of the positive plate of the separation electric field or the negative plate of the separation electric field, v is the water flow speed of water flowing through the separation flow channel, and d is the distance between the positive plate of the separation electric field and the negative plate of the separation electric field; />The range of (2) is 1/15-1/8; thus, the metal cations with the ratios of 0 to 1/15 to 1/8 of calcium ions, sodium ions and the like can flow out from a splitter outlet formed between the first splitter plate and the inner wall of the separation flow channel;
the distance between the second block of shunt separator and the positive plate of the separation electric field is as follows:
the range of (2) is 1/28-1/20; thus, the metal cations with the ratio of silver ions, cadmium ions and the like between 1/15 to 1/8 and 1/28 to 1/20 can flow out from a splitter outlet formed between the first splitter baffle plate and the second splitter baffle plate;
the distance between the third shunt separator and the positive plate of the separation electric field is as follows:
the range of (2) is: 1/45 to 1/40; thus, metal cations such as barium ions, lead ions, mercury ions and the like having a specific charge of between 1/28 and 1/20 and between 1/45 and 1/40 can flow out from the splitter outlet formed between the second split partition plate and the third split partition plate.
At this time, the water flowing out from the diverter outlet formed between the second diverter baffle and the third diverter baffle is used as the first water outlet of the heavy metal ion detection device, so that whether heavy metal ions are contained in the water can be accurately and effectively detected.
Example III
Unlike the second embodiment, the split-flow partition is provided with two blocks, see fig. 4, in which:
the distance between the first shunt separator and the positive plate of the separation electric field is as follows:
wherein K is a constant smaller than 1 and larger than 0, U is the voltage between the anode and the cathode of the second external stabilized power supply, l is the length of the positive plate of the separation electric field or the negative plate of the separation electric field, v is the water flow speed of water flowing through the separation flow channel, and d is the distance between the positive plate of the separation electric field and the negative plate of the separation electric field; />Ranges of (2)1/15 to 1/8;
the distance between the second block of shunt separator and the positive plate of the separation electric field is as follows:
the range of (2) is 1/45 to 1/40.
At this time, the water flowing out from the diverter outlet formed between the first diverter baffle and the second diverter baffle is used as the first water outlet of the heavy metal ion detection and separation device, and whether heavy metal ions are contained in the water can be accurately and effectively detected.
Claims (7)
1. A water quality detection system comprises an organic matter detection sensor for detecting the organic matter content in water; the method is characterized in that: the device also comprises a heavy metal ion detection device capable of detecting whether the water contains heavy metal ions, and the heavy metal ion detection device comprises
A separation flow path including an inlet and an outlet;
the auxiliary current field positive plate is arranged in the separation flow channel and is close to the inlet of the separation flow channel and is electrically connected with the positive electrode of the first external stabilized voltage supply;
the auxiliary collector field negative plate is arranged in the separation flow channel, is close to the inlet of the separation flow channel, is electrically connected with the negative electrode of the first external stabilized power supply, is opposite to the auxiliary collector field positive plate and is arranged at intervals in parallel, and the distance between the auxiliary collector field positive plate and the auxiliary collector field negative plate is d;
the separation electric field positive plate is arranged in the separation flow channel, is close to the outlet of the separation flow channel, is in the same straight line with the auxiliary electric field negative plate, is connected with the positive electrode of the second external stabilized voltage supply, and has a D distance from the rear end part of the auxiliary electric field negative plate, wherein D is larger than 0; the first external stabilized voltage supply is a pulse stabilized voltage;
the separation electric field negative plate is arranged in the separation flow channel, is close to the outlet of the separation flow channel, is in the same straight line with the auxiliary electric field positive plate, is connected with the negative electrode of the second external stabilized voltage supply, and has a D distance from the rear end part of the auxiliary electric field positive plate, wherein D is larger than 0; the length of the negative pole piece of the separation electric field is the same as that of the positive pole piece of the separation electric field, and the length of the negative pole piece of the separation electric field is D;
the outlet of the separation flow channel is provided with N flow dividing baffles which are arranged in parallel and at intervals with the positive plate of the separation electric field, so that the outlet of the separation flow channel is divided into N+1 flow dividing sub outlets, and the value of N is a natural number greater than or equal to 2; taking water flowing out from one diverter outlet positioned at the middle or any one of two diverter outlets positioned at the middle as first water outlet of the heavy metal ion detection device; mixing water flowing out of the outlets of the other shunts to serve as second water outlet of the heavy metal ion detection device;
the TDS sensor is used for detecting the TDS value in the first effluent, and the detection value of the TDS sensor is used as a basis for judging whether heavy metal ions are contained in the water or not;
said n=2 or n=3;
when n=2, the distance between the first shunt separator and the positive plate of the separation electric field is:
wherein K is a constant smaller than 1 and larger than 0, U is the voltage between the anode and the cathode of the second external stabilized power supply, l is the length of the positive plate of the separation electric field or the negative plate of the separation electric field, v is the water flow speed of water flowing through the separation flow channel, and d is the distance between the positive plate of the separation electric field and the negative plate of the separation electric field; />The range of (2) is 1/15-1/8; the distance between the second block of shunt separator and the positive plate of the separation electric field is as follows: /> The range of (2) is 1/45-1/40; to discharge the flow splitter formed between the first flow splitter plate and the second flow splitter plateThe water flowing out of the outlet is used as first water outlet of the heavy metal ion detection device; mixing water flowing out of the outlets of the other two flow splitters to serve as second water outlet of the heavy metal ion detection device;
when n=3, the distance between the first shunt separator and the positive plate of the separation electric field is:
wherein K is a constant smaller than 1 and larger than 0, U is the voltage between the anode and the cathode of the second external stabilized power supply, l is the length of the positive plate of the separation electric field or the negative plate of the separation electric field, v is the water flow speed of water flowing through the separation flow channel, and d is the distance between the positive plate of the separation electric field and the negative plate of the separation electric field; />The range of (2) is 1/15-1/8; the distance between the second block of shunt separator and the positive plate of the separation electric field is as follows: /> The range of (2) is 1/28-1/20; the distance between the third shunt separator and the positive plate of the separation electric field is as follows:
the range of (2) is: 1/45-1/40, taking water flowing out from a diverter outlet formed between the second diverter baffle and the third diverter baffle as first water outlet of the heavy metal ion detection device; mixing the water flowing out of the outlets of the other three current divider to be used as second water outlet of the heavy metal ion detection device.
2. The water quality testing system of claim 1, wherein: in the pulse type voltage stabilizing voltage of the first external voltage stabilizing power supply, the pressurizing time is smaller than the non-pressurizing time, namely the duty ratio of the pulse type voltage stabilizing voltage is smaller than 50%.
3. The water quality testing system of claim 1, wherein: when the first external stabilized voltage power supply is pressurized, the voltage between the anode and the cathode is less than or equal to 2V; the voltage between the anode and the cathode of the second external stabilized power supply is less than or equal to 2V.
4. The water quality testing system of claim 1, wherein: the inlet of the separation flow channel is arranged between the front end part of the auxiliary current field positive plate and the front end part of the auxiliary current field negative plate or between the front end part of the auxiliary current field positive plate and the front end of the auxiliary current field negative plate to form the inlet of the separation flow channel; and an outlet of the separation flow channel is formed between the rear end part of the separation electric field positive plate and the rear end part of the separation electric field negative plate.
5. The water quality detection system according to any one of claims 1 to 4, wherein: the device also comprises a display screen electrically connected with the organic matter detection sensor and the TDS sensor in the heavy metal ion detection device.
6. The water quality testing system of claim 5, wherein: the water inlet of the water quality detection system is communicated with the inlet of the organic matter detection sensor, the outlet of the organic matter detection sensor is communicated with the inlet of the flowmeter, the outlet of the flowmeter is communicated with the inlet of the separation flow channel in the heavy metal ion detection device, and the flowmeter is also electrically connected with the display screen.
7. The water quality testing system of claim 5, wherein: and a second TDS sensor is also connected between the outlet of the organic matter detection sensor and the inlet of the flowmeter, and the second TDS sensor is also electrically connected with the display screen.
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