CN110346509A - A kind of online permanganate index monitor of water quality and detection method - Google Patents
A kind of online permanganate index monitor of water quality and detection method Download PDFInfo
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- CN110346509A CN110346509A CN201910789130.0A CN201910789130A CN110346509A CN 110346509 A CN110346509 A CN 110346509A CN 201910789130 A CN201910789130 A CN 201910789130A CN 110346509 A CN110346509 A CN 110346509A
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- bottle
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- water sample
- digestion pool
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 160
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 84
- 230000029087 digestion Effects 0.000 claims abstract description 80
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 claims abstract description 38
- 229940039790 sodium oxalate Drugs 0.000 claims abstract description 38
- 238000004448 titration Methods 0.000 claims abstract description 23
- 238000005070 sampling Methods 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 18
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000006073 displacement reaction Methods 0.000 claims description 19
- 238000005259 measurement Methods 0.000 claims description 14
- 239000002699 waste material Substances 0.000 claims description 14
- 239000012286 potassium permanganate Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 7
- 239000003153 chemical reaction reagent Substances 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 5
- 102000005393 Sodium-Potassium-Exchanging ATPase Human genes 0.000 claims description 4
- 108010006431 Sodium-Potassium-Exchanging ATPase Proteins 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910021645 metal ion Inorganic materials 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 16
- 238000004313 potentiometry Methods 0.000 description 4
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052700 potassium Inorganic materials 0.000 description 3
- 239000011591 potassium Substances 0.000 description 3
- 238000003918 potentiometric titration Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 230000009191 jumping Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- IPGOVDXOBDFUBM-UHFFFAOYSA-N oxalic acid;sodium Chemical compound [Na].OC(=O)C(O)=O IPGOVDXOBDFUBM-UHFFFAOYSA-N 0.000 description 2
- 229910001961 silver nitrate Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/16—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using titration
- G01N31/162—Determining the equivalent point by means of a discontinuity
- G01N31/164—Determining the equivalent point by means of a discontinuity by electrical or electrochemical means
-
- 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
Abstract
The present invention relates to a kind of online permanganate index monitors of water quality, including cabinet, touch control display is installed on the cabinet, industrial personal computer, resolution unit, titration unit, sampling unit are installed in cabinet, liquid feeding unit and drain storage element, the resolution unit, titration unit, sampling unit, liquid feeding unit and drain storage element are connect with industrial personal computer respectively, are mounted on capacitance type sensor in the sulfuric acid volumetric bottle, sodium oxalate volumetric bottle, pure water volumetric bottle and water sample volumetric bottle.The present invention can be realized independent sample introduction and drain, and the High-temperature Digestion that type semienclosed digestion pool is able to carry out sample parses metal ion；Stirring motor can be such that solution is sufficiently mixed can also good cleaning electrode.The invention further relates to the detection methods of the online permanganate index monitor of above-mentioned water quality, are able to carry out the continuous monitoring of online water quality permanganate index, reflect the variation of water quality permanganate index at any time, reduce the workload of monitoring personnel.
Description
Technical field
The present invention relates to the online permanganate index monitor of water quality and detection methods, belong to water quality inspection technique field.
Background technique
Permanganate index refers in acid or alkaline medium, using potassium permanganate as oxidant, is disappeared when handling water sample
The amount of the oxidant of consumption is mainly used in and grasps drinking water and surface water quality.
In the prior art, water sampling is usually taken to the detection of water quality permanganate index and send laboratory, needed to original
Beginning sample is cleared up, is distilled, and then carries out manual titration, low efficiency, complicated for operation, easy to operate by mistake, and water sample conveys
Secondary pollution caused by process will affect the objectivity of testing result.
Redox potentiometry method is one kind based on the electronics transfer in solution between Oxidizing and Reducing Agents
Titration assay method.Potentiometric titration is the method in titration process by measurement potential change to determine titration end-point, and
Direct potentiometric method is compared, potentiometric titration does not need accurate measuring electrode potential value, therefore, temperature, liquid junction potential
Influence not important, accuracy is better than direct potentiometric method, and common titration is to indicate to titrate by indicator color change
Terminal, using there is certain limitation, if solution to be measured has color or muddiness, the instruction of terminal is with regard to relatively difficult.Do not having
Or it can not also be analyzed using common titration in the case where lacking conjunction indicator.
Potentiometric titration is that the jumping of electrode potential is leaned on to indicate titration end-point.Before and after titration is reached home, in dropping liquid
Ion concentration to be measured often n order of magnitude of consecutive variations, cause the jumping of current potential, be tested the content of ingredient still through consumption
The amount of titrant calculates.Since the sensitivity of redox potentiometry method and accuracy are high, and it can realize automation and continuous
Measurement.Permanganate index monitor currently on the market mostly uses common titration, and there are certain limitations for use scope, produces
Product are at high cost and inconvenient.
Summary of the invention
Technical problem to be solved by the present invention lies in a kind of online permanganate index monitor of water quality is provided, using oxygen
Change reduction potential titration, be able to carry out the continuous monitoring of online water quality permanganate index, reflects water quality permanganate at any time
The variation of index.
To solve the above-mentioned problems, The technical solution adopted by the invention is as follows:
A kind of online permanganate index monitor of water quality, including cabinet are equipped with touch control display on the cabinet,
Industrial personal computer, resolution unit, titration unit, sampling unit, liquid feeding unit and drain storage element are installed in cabinet,
The resolution unit, titration unit, sampling unit, liquid feeding unit and drain storage element are connect with industrial personal computer respectively,
The resolution unit includes fixed by the sequentially connected sodium oxalate storage bottle of liquid pipe, sodium oxalate liquid feeding pump, sodium oxalate
Measuring bottle, sodium oxalate liquid feed valve and type semienclosed digestion pool are equipped with stirring motor and observation electricity in the type semienclosed digestion pool
Pole,
Titration unit includes the syringe pump, threeway pinch valve and potassium permanganate holding bottle by step motor control, the note
It penetrates pump to connect with one end of threeway pinch valve, the other both ends of threeway pinch valve connect potassium permanganate holding bottle by liquid pipe respectively
With type semienclosed digestion pool,
The sampling unit include by the sequentially connected water sample storage bottle of liquid pipe, water sample liquid feeding pump, water sample volumetric bottle and
Water sample liquid feed valve, the water sample liquid feed valve are connect with type semienclosed digestion pool, and the water sample storage bottle is connect with reagent barrel, described
Reagent barrel is connect with sampler,
The liquid feeding unit is divided into two-way, and the first via is sequentially connected sulfuric acid storage bottle, sulfuric acid liquid feeding pump, sulfuric acid by liquid pipe
Volumetric bottle, sulfuric acid liquid feed valve and type semienclosed digestion pool；Second tunnel is sequentially connected pure water storage bottle, pure water feed liquor by liquid pipe
Pump, pure water volumetric bottle, pure water liquid feed valve and type semienclosed digestion pool,
The drain storage element includes positive displacement pump and waste liquid storage bottle, the both ends of the positive displacement pump pass through respectively liquid pipe with
Waste liquid storage bottle and the connection of type semienclosed digestion pool,
Condenser type biography is mounted in the sulfuric acid volumetric bottle, sodium oxalate volumetric bottle, pure water volumetric bottle and water sample volumetric bottle
Sensor.
Further, it further includes Prearranged elements, the Prearranged elements include by the sequentially connected reserved storage bottle of liquid pipe,
Reserved liquid feeding pump, reserved volumetric bottle and reserved liquid feed valve, the reserved liquid feed valve are connect with type semienclosed digestion pool.Prearranged elements
Effect be when chlorine ion concentration is too high in detected water sample, can by Prearranged elements extract silver nitrate carry out at neutralization
Reason；In other situations, it can be used as the Spare Parts Urgent of other sample introduction parts of instrument, to replace maintenance.
Further, in order to be filtered to sample introduction, the inlet of the sampler is connect with water pump, is installed on sampling line
There is Y-filter.
Further, so that the volume of water sample flow into instrument is generated mistake in order to avoid hydraulic pressure is excessively high, cause measurement error
Increase.The flow of the sampler is 5~10m3/ h, test water sample pressure are 0.02~0.04MPa.
Further, the touch control display is installed on the upper end of cabinet.
The present invention also provides the detection methods of the online permanganate index monitor of above-mentioned water quality, comprising the following steps:
S1, power switch is pressed, starts industrial personal computer, monitoring time is set on touch control display；
S2, automatic prewashing: sulfuric acid liquid feeding pump, sodium oxalate liquid feeding pump, pure water liquid feeding pump and water sample liquid feeding pump start simultaneously, respectively
Solution in storage bottle respectively enters in corresponding volumetric bottle, when capacitance type sensor position location of the liquid level of solution into each bottle
When stop feed liquor, industrial personal computer controls positive displacement pump and opens, the liquid feed valve through installing on respective pipeline respectively of the solution in each volumetric bottle
Solution is injected to type semienclosed digestion pool, waste liquid storage bottle is then drained by positive displacement pump, realization is drained on one side while feed liquor；
S3, cleaning step: the cleaning step includes the pure water cleaning step and water sample rinse to type semienclosed digestion pool
Step；
S4, sampling procedure: water sample feed liquor pump startup, water sample enter water sample volumetric bottle by water sample storage bottle, reach to liquid level
Stop feed liquor behind capacitance type sensor position location, the reversion of water sample liquid feeding pump is quantitative, and water sample is injected half by the starting of water sample liquid feed valve
In enclosed type digestion pool；
S5, acid adding step: sulfuric acid feed liquor pump startup, sulfuric acid enter sulfuric acid volumetric bottle by sulfuric acid storage bottle, reach to liquid level
Stop feed liquor behind capacitance type sensor position location, the reversion of sulfuric acid liquid feeding pump is quantitative.Sulfuric acid is injected half by the starting of sulfuric acid liquid feed valve
In enclosed type digestion pool；
S6, resolution step, including three steps:
S61, stirring motor is opened, observes the potential change of electrode, and heated at constant temperature is carried out to type semienclosed digestion pool and is disappeared
Solution；
S62, sodium oxalate feed liquor: sodium oxalate feed liquor pump startup, sodium oxalate enter sodium oxalate volumetric bottle by sodium oxalate storage bottle,
Stop feed liquor after liquid level reaches capacitance type sensor position location, the reversion of sodium oxalate liquid feeding pump is quantitative, and sodium oxalate liquid feed valve opens
It is dynamic to inject sulfuric acid in type semienclosed digestion pool,
S63, the resolution of constant temperature continuous heating is carried out to type semienclosed digestion pool；
S7, titration step: threeway pinch valve obtains electric, to connect with potassium permanganate holding bottle one end connection, by stepper motor
Drive syringe pump liquor potassic permanganate is pumped into syringe pump, and reach lower limit stopping, threeway pinch valve with it is type semienclosed
One end of digestion pool connection is closed, then threeway pinch valve power loss, switches pipeline, and threeway pinch valve and potassium permanganate holding bottle connect
The one end connect is closed, and the one end connecting with type semienclosed digestion pool is opened, and learns corresponding liquor potassic permanganate volume by calculating
The pulse of amount pushes syringe pump to inject liquor potassic permanganate to type semienclosed digestion pool from stepper motor.
S8, second pure water cleaning step, clean type semienclosed digestion pool.
Further, the pure water cleaning step S31 is that pure water feed liquor pump startup, pure water enters pure water by pure water storage bottle
Volumetric bottle stops feed liquor after liquid level reaches capacitance type sensor position location, and the reversion of pure water liquid feeding pump is quantitative, pure water liquid feed valve
Starting injects pure water in type semienclosed digestion pool, and the pure water in type semienclosed digestion pool is drained into waste liquid storage by starting positive displacement pump
Bottle, cleans type semienclosed digestion pool,
The water sample rinse step S32 is that water sample feed liquor pump startup, water sample enters water sample volumetric bottle by water sample storage bottle,
Stop feed liquor after liquid level reaches capacitance type sensor position location, the reversion of water sample liquid feeding pump is quantitative.The starting of water sample liquid feed valve will
Water sample injects in type semienclosed digestion pool, starts positive displacement pump for the water sample in type semienclosed digestion pool and drains into waste liquid storage bottle, right
Type semienclosed digestion pool carries out rinse.
Further, there are three types of modes for the time supervision of the touch control display: the continuous measurement of separated in time；Setting
The integral point measurement of time control and single manual measurement.
The working principle of the invention is that the present invention can be realized independent sample introduction and drain, the capacitor in each volumetric bottle and bottle
Formula sensor can judge the accuracy of sampling；Type semienclosed digestion pool is able to carry out the High-temperature Digestion of sample metal ion solution
It separates out；Each liquid feeding pump is capable of providing the power of sampling or feed liquor；Stirring motor can make solution be sufficiently mixed can preferably be enriched with,
Measurement can also good cleaning electrode.
Compared with prior art, the beneficial effects of the present invention are:
1, permanganate index monitor of the invention is able to carry out the continuous monitoring of online water quality permanganate index, with
The variation of Shi Fanying water quality permanganate index, reduces the workload of monitoring personnel.
2, the monitoring precision of permanganate index monitor of the invention greatly improves, and machine cost is low.
3, the detection method of permanganate index monitor of the invention can quickly detect permanganate index content, accomplish
It is unattended, including digestion time, it measures a sample and needs can be automatically performed for 40 minutes.
4, time supervision mode is selective there are three types of the detection methods of permanganate index monitor of the invention, function
It is more, it is applied widely.
5, the measurement matched reagent of permanganate index monitor of the invention does not pollute reagent, not will cause secondary dirt
Dye.Repeatability: it is no more than ± 5%, glucose error: is no more than ± 5%, specifically see the table below:
Repeatability error
Glucose test
Detailed description of the invention
Fig. 1 is that the structural schematic diagram of the online permanganate index monitor of water quality of the present invention opens upper cover 1a and lower cover 1b.
Fig. 2 is the outline drawing of sampler in online one embodiment of permanganate index monitor of water quality of the present invention.
Fig. 3 is the flow diagram of the online permanganate index monitor of water quality of the present invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.According to following explanation, originally
The purposes, technical schemes and advantages of invention will be apparent from.It should be noted that described embodiment is of the invention preferred
Embodiment, instead of all the embodiments.
In conjunction with shown in Fig. 1 and Fig. 3, a kind of online permanganate index monitor of water quality, including cabinet 1, on the cabinet 1
Touch control display 2 is installed.Be equipped in cabinet 1 industrial computer A, resolution unit, titration unit, sampling unit, liquid feeding unit and
Drain storage element, the resolution unit, titration unit, sampling unit, liquid feeding unit and drain storage element respectively with industry control
Machine A connection is simultaneously controlled by industrial personal computer.
The resolution unit includes passing through the sequentially connected sodium oxalate storage bottle C of liquid pipe B2, sodium oxalate liquid feeding pump M2, oxalic acid
Sodium quantitative bottle D2, sodium oxalate liquid feed valve Y2With type semienclosed digestion pool Q, stirring motor is installed in the type semienclosed digestion pool Q
J and observation electrode Z.Stirring motor J can make solution be sufficiently mixed can preferably be enriched with, measure can also cleaning electrode Z well.
Titrating unit includes by stepper motor M0Syringe pump S, the threeway pinch valve T and potassium permanganate holding bottle C of control6, institute
It states syringe pump S to connect with one end of threeway pinch valve T, the other both ends of threeway pinch valve T pass through liquid pipe respectively and connect permanganic acid
Potassium holding bottle C6With type semienclosed digestion pool Q.
The sampling unit includes passing through the sequentially connected water sample storage bottle C of liquid pipe B4, water sample liquid feeding pump M4, water sample it is quantitative
Bottle D4With water sample liquid feed valve Y4, the water sample liquid feed valve Y4It is connect with type semienclosed digestion pool Q, the water sample storage bottle C4With examination
Agent bucket 10 connects, and the reagent barrel 10 is connect with sampler 11.As shown in connection with fig. 3, the inlet and water pump of the sampler 11
12 connect, and are equipped with Y-filter 13 on sampling line 11.Preferably, the flow of sampler 11 is 5~10m3/ h, test
Water sample pressure is 0.02~0.04MPa.
The liquid feeding unit is divided into two-way, and the first via is sequentially connected sulfuric acid storage bottle C1, sulfuric acid liquid feeding pump by liquid pipe B
M1, sulfuric acid volumetric bottle D1, sulfuric acid liquid feed valve Y1With type semienclosed digestion pool Q；Second tunnel is sequentially connected pure water storage by liquid pipe B
Bottle C3, pure water liquid feeding pump M3, pure water volumetric bottle D3, pure water liquid feed valve Y3With type semienclosed digestion pool Q,
The drain storage element includes positive displacement pump M6With waste liquid storage bottle C7, the positive displacement pump M6Both ends pass through respectively
Liquid pipe and waste liquid storage bottle C7And type semienclosed digestion pool Q connection,
The sulfuric acid volumetric bottle D1, sodium oxalate volumetric bottle D2, pure water volumetric bottle D3And water sample volumetric bottle D4Inside it is mounted on electricity
Capacity sensor F.
Further, it further includes Prearranged elements, and the Prearranged elements include passing through the sequentially connected reserved storage bottle of liquid pipe
C5, reserved liquid feeding pump M5, reserved volumetric bottle D5 and reserved liquid feed valve Y5, the reserved liquid feed valve Y5Connect with type semienclosed digestion pool Q
It connects.The effect of Prearranged elements is when chlorine ion concentration is too high in detected water sample, can extract silver nitrate by Prearranged elements
It is neutralized；In other situations, it can be used as the Spare Parts Urgent of other sample introduction parts of instrument, to replace maintenance.
The present invention also provides the detection methods of the online permanganate index monitor of above-mentioned water quality, comprising the following steps:
S1, power switch K is pressed, starts industrial computer A, monitoring time is set on touch control display 2；
S2, prewashing: sulfuric acid liquid feeding pump M1, sodium oxalate liquid feeding pump M2, pure water liquid feeding pump M3With water sample liquid feeding pump M4It opens simultaneously
Dynamic, the solution in each storage bottle respectively enters in corresponding volumetric bottle, when capacitance type sensor F of the liquid level of solution into each bottle is fixed
Stop feed liquor when the position of position, industrial computer A controls positive displacement pump M6It opens, the solution in each volumetric bottle on respective pipeline respectively through installing
Liquid feed valve to type semienclosed digestion pool Q inject solution, then pass through positive displacement pump M6Drain into waste liquid storage bottle C7, realize on one side into
The drain of liquid one side；
S3, cleaning step: the cleaning step includes the pure water cleaning step S31 and water sample to type semienclosed digestion pool Q
Rinse step S32:
The pure water cleaning step S31 is pure water liquid feeding pump M3Starting, pure water is by pure water storage bottle C3It is quantitative into pure water
Bottle D3, stop feed liquor, pure water liquid feeding pump M after liquid level reaches the position location capacitance type sensor F3Reversion is quantitative, pure water liquid feed valve
Y3Starting injects pure water in type semienclosed digestion pool Q, starts positive displacement pump M6Pure water in type semienclosed digestion pool Q is drained into useless
Liquid storage bottle C7, type semienclosed digestion pool Q is cleaned,
The water sample rinse step S32 is water sample liquid feeding pump M4Starting, water sample is by water sample storage bottle C4It is quantitative into water sample
Bottle D4, stop feed liquor, water sample liquid feeding pump M after liquid level reaches the position location capacitance type sensor F4Reversion is quantitative.Water sample liquid feed valve
Y4 starting injects water sample in type semienclosed digestion pool Q, starts positive displacement pump M6Water sample in type semienclosed digestion pool Q is drained into useless
Liquid storage bottle C7, rinse is carried out to type semienclosed digestion pool Q；
S4, sampling procedure: water sample liquid feeding pump M4Starting, water sample is by water sample storage bottle C4Into water sample volumetric bottle D4, to liquid level
Reach capacitance type sensor F4Stop feed liquor, water sample liquid feeding pump M behind position location4Reversion is quantitative, water sample liquid feed valve Y4Start water
Sample injects in type semienclosed digestion pool Q；
S5, acid adding step: sulfuric acid liquid feeding pump M1Starting, sulfuric acid is by sulfuric acid storage bottle C1Into sulfuric acid volumetric bottle D1, to liquid level
Stop feed liquor, sulfuric acid liquid feeding pump M after reaching the position location capacitance type sensor F1Reversion is quantitative.Sulfuric acid liquid feed valve Y1Start sulphur
Acid injects in type semienclosed digestion pool Q；
S6, resolution step, comprising:
S61, stirring motor J is opened, observes the potential change of electrode Z, and heated at constant temperature is carried out to type semienclosed digestion pool Q
Resolution；
S62, sodium oxalate feed liquor: sodium oxalate liquid feeding pump M2Starting, sodium oxalate is by sodium oxalate storage bottle C2Into oxalic acid sodium quantitative
Bottle D2, reach capacitance type sensor F to liquid level2Stop feed liquor, sodium oxalate liquid feeding pump M behind position location2Reversion is quantitative, sodium oxalate
Liquid feed valve Y2Starting injects sulfuric acid in type semienclosed digestion pool Q,
S63, the resolution of constant temperature continuous heating is carried out to type semienclosed digestion pool Q；
S7, titration step: threeway pinch valve T obtain it is electric, with potassium permanganate holding bottle C6One end of connection is connected to, by stepping electricity
Machine M0It drives syringe pump S that liquor potassic permanganate is pumped into syringe pump S, and reaches lower limit stopping, threeway pinch valve and half
One end of enclosed type digestion pool Q connection is closed, then threeway pinch valve T power loss, switches pipeline, threeway pinch valve T and permanganic acid
Potassium holding bottle C6One end of connection is closed, and the one end connecting with type semienclosed digestion pool Q is opened, and learns corresponding Gao Meng by calculating
The pulse of sour potassium solution volume, by stepper motor M0Push syringe pump S molten to type semienclosed digestion pool Q injection potassium permanganate
Liquid.
S8, second pure water cleaning step: pure water liquid feeding pump M3Starting, pure water is by pure water storage bottle C3Into pure water volumetric bottle
D3, stop feed liquor, pure water liquid feeding pump M after liquid level reaches the position location capacitance type sensor F3Reversion is quantitative.Pure water liquid feed valve Y3
Starting injects pure water in type semienclosed digestion pool Q.Start positive displacement pump M6Pure water in Q is drained into waste liquid storage bottle C7, half-and-half seal
Closed form digestion pool Q is cleaned.
There are three types of modes for the time supervision of the touch control display 2: the continuous measurement of separated in time is (as interval one is small
When)；The integral point measurement of setting time control and single manual measurement.
The above is only the description explanation of the preferred embodiment of the present invention, and not limiting the scope of the present invention, shows
So, anyone skilled in the art based on the above embodiment, can readily occur in replacement or variation to obtain other implementations
Example, these are covered by the protection scope of the present invention.
Claims (8)
1. a kind of online permanganate index monitor of water quality, including cabinet, it is characterised in that:
Touch control display is installed on the cabinet,
Industrial personal computer, resolution unit, titration unit, sampling unit, liquid feeding unit and drain storage element are installed in cabinet, it is described
Unit, titration unit, sampling unit are cleared up, liquid feeding unit and drain storage element are connect with industrial personal computer respectively,
The resolution unit include by the sequentially connected sodium oxalate storage bottle of liquid pipe, sodium oxalate liquid feeding pump, sodium oxalate volumetric bottle,
Sodium oxalate liquid feed valve and type semienclosed digestion pool are equipped with stirring motor and observation electrode in the type semienclosed digestion pool,
Titration unit includes the syringe pump, threeway pinch valve and potassium permanganate holding bottle by step motor control, the syringe pump
It is connect with one end of threeway pinch valve, the other both ends of threeway pinch valve connect potassium permanganate holding bottle and half by liquid pipe respectively
Enclosed type digestion pool,
The sampling unit includes passing through the sequentially connected water sample storage bottle of liquid pipe, water sample liquid feeding pump, water sample volumetric bottle and water sample
Liquid feed valve, the water sample liquid feed valve are connect with type semienclosed digestion pool, and the water sample storage bottle is connect with reagent barrel, the reagent
Bucket is connect with sampler,
The liquid feeding unit is divided into two-way, and it is quantitative that the first via by liquid pipe is sequentially connected sulfuric acid storage bottle, sulfuric acid liquid feeding pump, sulfuric acid
Bottle, sulfuric acid liquid feed valve and type semienclosed digestion pool；Second tunnel is sequentially connected pure water storage bottle, pure water liquid feeding pump, pure by liquid pipe
Water volumetric bottle, pure water liquid feed valve and type semienclosed digestion pool,
The drain storage element includes positive displacement pump and waste liquid storage bottle, and the both ends of the positive displacement pump pass through liquid pipe and waste liquid respectively
Storage bottle and the connection of type semienclosed digestion pool,
Capacitance type sensor is mounted in the sulfuric acid volumetric bottle, sodium oxalate volumetric bottle, pure water volumetric bottle and water sample volumetric bottle.
2. the online permanganate index monitor of water quality according to claim 1, it is characterised in that:
It further includes Prearranged elements, the Prearranged elements include by the sequentially connected reserved storage bottle of liquid pipe, reserved liquid feeding pump,
Reserved volumetric bottle and reserved liquid feed valve, the reserved liquid feed valve are connect with type semienclosed digestion pool.
3. the online permanganate index monitor of water quality according to claim 1, it is characterised in that:
The inlet of the sampler is connect with water pump, and Y-filter is equipped on sampling line.
4. the online permanganate index monitor of water quality according to claim 1, it is characterised in that:
The flow of the sampler is 5~10m3/ h, test water sample pressure are 0.02~0.04MPa.
5. the online permanganate index monitor of water quality according to claim 1, it is characterised in that:
The touch control display is installed on the upper end of cabinet.
6. the detection method of the online permanganate index monitor of water quality as described in power 1 to 5 any claims of power, feature
It is, comprising the following steps:
S1, power switch is pressed, starts industrial personal computer, monitoring time is set on touch control display；
S2, automatic prewashing: sulfuric acid liquid feeding pump, sodium oxalate liquid feeding pump, pure water liquid feeding pump and water sample liquid feeding pump start simultaneously, each to store
Solution in bottle respectively enters in corresponding volumetric bottle, stops when capacitance type sensor position location of the liquid level of solution into each bottle
Only feed liquor, industrial personal computer control positive displacement pump and open, the solution in each volumetric bottle respectively the liquid feed valve through being installed on respective pipeline to half
Enclosed type digestion pool injects solution, then drains into waste liquid storage bottle by positive displacement pump, and realization is drained on one side while feed liquor；
S3, cleaning step: the cleaning step includes the pure water cleaning step and water sample rinse step to type semienclosed digestion pool；
S4, sampling procedure: water sample feed liquor pump startup, water sample enter water sample volumetric bottle by water sample storage bottle, reach capacitor to liquid level
Stop feed liquor behind formula sensor position location, the reversion of water sample liquid feeding pump is quantitative, and the starting of water sample liquid feed valve injects water sample semiclosed
In type digestion pool；
S5, acid adding step: sulfuric acid feed liquor pump startup, sulfuric acid enter sulfuric acid volumetric bottle by sulfuric acid storage bottle, reach capacitor to liquid level
Stop feed liquor behind formula sensor position location, the reversion of sulfuric acid liquid feeding pump is quantitative.The starting of sulfuric acid liquid feed valve injects sulfuric acid semiclosed
In type digestion pool；
S6, resolution step, including three steps:
S61, stirring motor is opened, observes the potential change of electrode, and heated at constant temperature resolution is carried out to type semienclosed digestion pool；
S62, sodium oxalate feed liquor: sodium oxalate feed liquor pump startup, sodium oxalate enters sodium oxalate volumetric bottle by sodium oxalate storage bottle, to liquid
Face stops feed liquor after reaching capacitance type sensor position location, and the reversion of sodium oxalate liquid feeding pump is quantitative, and the starting of sodium oxalate liquid feed valve will
Sulfuric acid injects in type semienclosed digestion pool,
S63, the resolution of constant temperature continuous heating is carried out to type semienclosed digestion pool；
S7, titration step: threeway pinch valve obtains electric, to connect with potassium permanganate holding bottle one end connection, is driven by stepper motor
Liquor potassic permanganate is pumped into syringe pump by syringe pump, and reaches lower limit stopping, threeway pinch valve and type semienclosed resolution
One end of pond connection is closed, then threeway pinch valve power loss, switches pipeline, and threeway pinch valve is connect with potassium permanganate holding bottle
One end is closed, and the one end connecting with type semienclosed digestion pool is opened, and learns corresponding liquor potassic permanganate volume by calculating
Pulse pushes syringe pump to inject liquor potassic permanganate to type semienclosed digestion pool from stepper motor.
S8, second pure water cleaning step, clean type semienclosed digestion pool.
7. the detection method of the online permanganate index monitor of water quality according to claim 6, it is characterised in that:
The pure water cleaning step S31 is that pure water feed liquor pump startup, pure water enters pure water volumetric bottle by pure water storage bottle, to liquid
Face stops feed liquor after reaching capacitance type sensor position location, and the reversion of pure water liquid feeding pump is quantitative, and pure water liquid feed valve starts pure water
It injects in type semienclosed digestion pool, starts positive displacement pump for the pure water in type semienclosed digestion pool and drain into waste liquid storage bottle, half-and-half seal
Closed form digestion pool is cleaned,
The water sample rinse step S32 is that water sample feed liquor pump startup, water sample enters water sample volumetric bottle by water sample storage bottle, to liquid
Face stops feed liquor after reaching capacitance type sensor position location, and the reversion of water sample liquid feeding pump is quantitative.Water sample liquid feed valve starts water sample
It injects in type semienclosed digestion pool, starts positive displacement pump for the water sample in type semienclosed digestion pool and drain into waste liquid storage bottle, half-and-half seal
Closed form digestion pool carries out rinse.
8. the detection method of the online permanganate index monitor of water quality according to claim 6, it is characterised in that:
There are three types of modes for the time supervision of the touch control display: the continuous measurement of separated in time；Setting time control
Integral point measurement and single manual measurement.
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| CN111855891A (en) * | 2020-07-27 | 2020-10-30 | 水利部南京水利水文自动化研究所 | Water quality permanganate index online analyzer and detection method thereof |
| CN112362399A (en) * | 2020-10-28 | 2021-02-12 | 北京欧仕科技有限公司 | Intelligent underground water low-speed well-flushing sampling system and method |
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