CN1019859B - Na ion concentration detector - Google Patents
Na ion concentration detectorInfo
- Publication number
- CN1019859B CN1019859B CN89108981A CN89108981A CN1019859B CN 1019859 B CN1019859 B CN 1019859B CN 89108981 A CN89108981 A CN 89108981A CN 89108981 A CN89108981 A CN 89108981A CN 1019859 B CN1019859 B CN 1019859B
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- China
- Prior art keywords
- alkalization
- water sample
- box
- chamber
- unit
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Abstract
The present invention relates to Na ion concentration detection device thereof in a kind of continuous coverage chemical water treatment process, this device is made up of transmitter and high resistant converter.Wherein be provided with specific water sample alkalization channel in the transmitter, make water sample in the channel flow process, absorb the base reagent steam and improve its pH value; The high resistant converter adopts ion selectivity PNa, pH bipolar electrode to measure and dual demonstration, and is furnished with water sample alkalization to be measured back pH value from the motion tracking regulating system, satisfies sodion and measures required necessary condition.Alkalization device and detection cell are isolated in this device, have increased equipment anti-interference ability, have improved measuring accuracy, have remedied general known Na ion concentration detector deficiency.
Description
The present invention relates to a kind of continuous coverage chemical treatment technology process intermediate ion exchanger outlet water quality Na ion concentration detection device thereof, this device can be according to test condition from motion tracking and regulate water sample pH value, and guarantees that detected water sample pH value satisfies the required condition of Na ion concentration.
As everyone knows, in the chemical water treatment process, ion-exchanger outlet water quality Na ion concentration need be followed the tracks of and detect, but because hydrogen ion has certain interference to sodium ion selective electrode detection Na ion concentration in the water sample, when measuring the water sample Na ion concentration, must reduce pH in the water sample, and make its concentration be lower than three orders of magnitude of Na ion concentration, could effectively suppress hydrogen ion disturbs, guarantee testing result accurately and reliably, otherwise hydrogen ion will detect the serious interference of generation to sodion in the water sample.So, in the existing conventional sense method, all need to adopt certain technological means, at first water sample is carried out basification, to adjust water sample pH value, reach accurate detection Na ion concentration purpose.
Existing technique known detection means adopts Na ion concentration detector mostly, although it is variant to water sample basification mode, but all there is certain problem to exist in various degree, sled 1800 types and 1811 types produced of U.S. Ao Lilong company (orions) for example, Na ion concentration detector adopts osmos tube basification mode, by iontophoretic injection base reagent is entered in the pipe among the water sample, reduce pH, improve water sample pH value.Because in the actual detected process, the penetrating power of osmos tube reduces gradually as time passes, osmos tube is subject to factor affecting such as contaminating impurity in addition, causes water sample alkalization pH value progressively to descend, and has influenced the accuracy and the reliability of water sample Na ion concentration testing result.The 8873 type Na ion concentration detectors made of Switzerland Bo Limeitelong (polymetron) and for example, base reagent adopts the peristaltic pump direct addition method to carry out the water sample basification, this kind pick-up unit mechanism complexity, on-the-spot operation maintenance amount are big and need a cover stirring apparatus to be mixed, high to the base reagent purity requirement in addition, to avoid wherein impurities pollution water sample.The DWG-250 type industrial sodium densimeter that domestic Shanghai thunder magnetic instrucment and meter plant produces adopts degassing method to carry out basification, exists that the pH value is inhomogeneous to cause problems such as testing result is inaccurate.
Worth prompting a bit, above-mentioned each pick-up unit is in detecting water sample Na ion concentration process, except that the basification mode had shortcoming separately, the detecting instrument that is adopted self all can't detect pH size-pH value in the water sample after the alkalization.Also can't require to adjust water sample pH value at random, more can't provide and regulate the pH value according to detecting
Needed foundation, and can only or adopt measures such as manually assisting chemical examination by the periodic replacement osmos tube, guarantee the accuracy and the reliability of testing result, but do corresponding testing cost and the labour intensity of having increased like this.
The object of the present invention is to provide a kind of can regulate automatically water sample pH value greater than Na ion concentration detector, to replace existing known Na ion concentration detector, remedy the deficiency that known detection means exists, improve Na ion concentration measuring accuracy and reliability and stability, reduce testing cost, reduce labor intensity.
Now with the invention design feature, the conjunction with figs. division is as follows:
Invention system is made up of transmitter and high resistant converter two parts.
A. wherein transmitter is the alkalization that is used to finish detected water sample, and obtains required detection signal from the alkalization water sample, and this part comprises alkalization device 1 and 11 liang of great institutions of detecting device.
(1) alkalization device 1 is made up of base reagent case 14, alkalization box 2, electric heater 3 and other annex, wherein base reagent case 14 tops are provided with reagent interpolation hole and seal pressure cap 4 thereof, alkalization box 2 and electric heater 3 are housed in the casing of this case, alkalization box 2 is used for the detected water sample basification, and electric heater 3 is used to regulate the base reagent solution temperature.Be provided with water sample alkalization channel 17 in the above-mentioned alkalization box 2, there are blasthole 15 and apopore 18 in these channel two ends, this box is horizontally fixed on the case internal upper part of base reagent case 14, entry constant current tube 5 is introduced water sample in the alkalization channel 17 by blasthole 15, the base reagent steam that produces in the base reagent case 14 is absorbed by the water sample to be measured of 17 li of channels and makes its alkalization, the alkalization water sample drips pipe 8 by the water outlet of alkalization device 1 and flows out, and supplies with detection cell 11 and detects the Na ion concentration use.In order to save base reagent, do not make water sample cross alkalization, one ventilative orifice plate 19 and the double alkalization box top cover of doing can be set on alkalization box 2 tops, the eyelet 28 of this orifice plate is positioned at the top of water sample channel 17, the eyelet quantity and the size that are arranged on alkalization channel 17 length in the box and the orifice plate 19 of breathing freely should take in from obtaining best alkalization effect as far as possible, desirable alkalization channel 17 versions can adopt the bent channel 17(of returning of snake shape to see Fig. 3 B for details), detected water sample is fully contacted evenly with the base reagent steam in snake shape channel 17 to alkalize, guarantee detected water sample alkalization effect, and the water sample after will alkalize is managed 8 and is directly sent in the detection cell 11 and detect with dripping.For guaranteeing water sample alkalization effect, should at first guarantee the detected water sample pressure stability, the present invention selects for use voltage stabilizing box 6 to reach the purpose of stablizing detected water sample pressure for this reason.This voltage stabilizing box 6 is divided into three parts-the both X of overflow chamber, pressure stabilizing chamber y and drip chamber z by different intermediate plate 24,25 inner chambers with box of two tile heights, one water delivering orifice 21,22,23 is arranged at each bottom, chamber, is provided with through hole 27 near intermediate plate 24 bottoms and links up x of overflow chamber and pressure stabilizing chamber y.After the non-voltage stabilizing current in outside entered voltage stabilizing box 6 by water inlet 20, the current of being drawn by constant current tube 5 by pressure stabilizing chamber y water delivering orifice 22 just can have steady pressure.The big I of tested discharge is regulated by the pinch roller 7 that is assemblied on the constant current tube 5, and by changing sectional area adjustment detected water sample flow in the constant current tube 5, above-mentioned pinch roller 7 similar are in medical transfusion bottle drip regulation device.Certainly the method for stablizing detected water sample pressure and water sample constant current has many, as the pressure-stabilizing constant flow valve etc.Clearly, above-mentioned voltage stabilizing box 6 and flow control pinch roller 7 thereof have only outside water supply to be under the astable situation, just are necessary special setting.In addition, when orifice plate 19 is breathed freely in design, should consider bleeder vent 28 sizes and the quantity thereof of orifice plate 19, make its top that has enough ventilative areas and be positioned at water sample channel 17, keeping alkalization water sample pH value to reach about pH10.5 is easily, avoids water sample to cross alkalization.Above-mentioned electric heater 3 rigging positions do not have specific (special) requirements, make it can directly heat alkalizing agent solution.
(2) wherein detection cell 11 be by measuring chamber 9, a plurality of electrode jack 10 and with a plurality of electrodes 10 of electrode jack 10 supporting assemblings ', drainpipe 12 and blowdown plug 13 formed, detection cell 2 is separate with alkalization device 1.Manage in 8 measuring chambers 9 that enter in the detection cell 11 by drippage through the water sample after the basification, and detect by respective electrode 10.The blowdown plug 13 of detection cell 11 is located at the measuring chamber bottom, is used to get rid of the dirt of this indoor heavy collection; The drainpipe 12 of detection cell 11 be located at the cavity 12 that is connected with electrode jack 10 ' the bottom, be used for discharging and survey the back water sample.PNa electrode, pH electrode, contrast electrode, temperature compensating electrode and ground-electrode are contained in separately the jack 10, form PNa and pH and measure battery, measure the Na ion concentration of alkalization water sample respectively, pairing potential value of pH and TWS.The heating power of above-mentioned electric heater 3 is controlled automatically by pH value testing result.
By above-mentioned can know see, water outlet drippage pipe 8 water sample that will alkalize drips in the measuring chamber 9, form the measurement electric battery by the electrode 10 of mutual coupling, measure the electromotive force value of corresponding ion concentration, and by resistive conductor the electromotive force value is sent into the high resistant converter and do respective handling.The concrete structure of above-mentioned transmitter and building block thereof can be referring to Fig. 1 to Fig. 9.
(b) wherein the high resistant converter comprises that metering circuit unit A, pH regulator circuit unit C and power supply unit of voltage regulation D constitute.
(1) wherein metering circuit unit A comprises PNa measuring unit A
1With pH measuring unit A
2The processing procedure of two parts, both detection signals is identical, both measures the electric potential signal of represent sodium ion concentration and pH by PNa electrode among the transmitter B and PH electrode, and imports high impedance circuit A respectively
11, A
21In, after impedance conversion, deliver to differential voltage amplifier stage A
12, A
22In become single
Voltage signal, again this signal is delivered to voltage negative feedback amplifier stage A
13, A
23After the amplification, conversion of signals is become current signal, exports to separately indicator gauge meter A respectively by voltage-current converter circuit
14, A
24The above-mentioned functions circuit adopts the serial connection form.
(2) pH value regulating circuit C is by reverser C
1Serial connection power output stage C
2Phase composition, this unit is with above-mentioned pH metering circuit A
2The current value of output is converted into voltage signal and delivers to phase inverter C
1Offer power output stage C
2Control electric heater 3 heating powers are regulated the base reagent solution temperature, change the base reagent vapor pressure, reach to regulate water sample pH value purpose.
(3) stabilized voltage supply D
1, D
2, D
3, D
4For the ripple voltage regulation unit is considered in common rectification, wherein: D
1, D
3Supply with PNa metering circuit line unit A
1; D
2Supply with pH metering circuit unit A
2; D
4Supply with pH regulator unit C.Above-mentioned each unit mutual relationship and circuit diagram thereof see Fig. 6, Fig. 7 for details.
The present invention adopts detected water sample mobile alkali vapor mode that absorbs in the alkalization channel, carry out the water sample basification, improved water sample pH value, stopped direct addition method and reduced the pollution to detected water sample that is caused inadequately or because of other factors make purity because of reagent purity, influence is to the detection of Na ion concentration; Simultaneously, when this device has been eliminated the alkalization of employing osmos tube again, need rough sledding such as periodic replacement osmos tube and maintenance, reduced testing cost.
Adopt ion selectivity PNa, pH bipolar electrode to measure, the dual indication of PNa, pH, and be furnished with pH value automatic tracking system after the water sample alkalization to be measured has overcome in the past because of whether the effect of not knowing to alkalize satisfies and has detected the deficiency that the requirement blindness is measured Na ion concentration.And the pH value signal feeds back to base reagent solution temperature control module simultaneously again among the present invention, utilize temperature and vapor pressure proportional, keep the needed base reagent vapor pressure of best alkalization effect, and then the pH value in the stable water sample, accomplish the automatic adjusting of pH value, guarantee accuracy and reliability that Na ion concentration is measured, fully save the base reagent consumption, prolong the reagent replacement cycle.
Adopt water sample alkalization device and the isolated mode of water sample measuring cell, the former integrates overflow, voltage stabilizing, constant current, alkalizes; The latter collects the multifactor measuring system of multi-electrode of PNa, pH potential electrode, contrast electrode, temperature electrode, ground-electrode composition, Na ion concentration and pH value are measured, change over single test mode, the two isolation is eliminated the various disturbing factors that influence is measured fully in the lump, has reduced the pick-up unit maintenance workload.
Below be description of drawings of the present invention:
Fig. 1 is a unitary construction synoptic diagram of the present invention.(front elevation)
Fig. 2 A, Fig. 2 B be in the transmitter alkalization device just, overlook
Figure.
Fig. 3 A, Fig. 3 B be in the above-mentioned alkalization device alkalization box just, overlook the partial cutaway diagrammatic sketch.
Fig. 4 A, Fig. 4 B be in the transmitter voltage stabilizing box just, vertical view.
Fig. 5 A, Fig. 5 B be the transmitter detection cell just, vertical view.
Fig. 6 is high resistant converter of the present invention and transmitter block diagram.
Fig. 7 is above-mentioned high resistant converter circuit figure.
Introduce the one embodiment of the invention and the course of work thereof in conjunction with above accompanying drawing.
In the present embodiment, introduce in the interior voltage stabilizing box 6 of transmitter B sampling back, tested water source, the water sample that enters the x of overflow chamber, the y of equalization chamber, drip chamber z is successively taken out in constant current tube 5 is sent into alkalization device 1 by pressure stabilizing chamber y bottom, constant current tube 5 is communicated with voltage stabilizing box 6 to be integral with alkalization box 2, voltage stabilizing box 6 horizontally disposed above alkalization device 1, constant current tube 5 is equipped with the pinch roller 7 of adjustment constant current size.Generally no longer regulate after constant current once mixes up, unless need transfer pinch roller 7 again during the adjusting flow, the water sample flow is typically chosen in 15-20ml/min for easy.Water sample is introduced alkalization boxes 2 by constant current tube 5 by blasthole 15, and flows along the alkalization channel 17 that circuitous shape is arranged, and absorbs by the ventilative orifice plate 19 in alkalization box 2 tops to enter base reagent steam in the box, improves detected water sample pH value.Water sample after the alkalization falls to managing 18 by water droplet to be introduced in the measuring chamber 9 of detection cells 11, form pH by the pH potential electrode of inserting tilting jack 10 side by side with the contrast electrode of corresponding insertion jack and measure battery, the pairing electromotive force of the pH that records is inserted high input-impedance stage A by high resistant connection terminal 29,30
21, this unit is made up of the operational amplifier 31,32 that high impedance, high precision, low temperature float, and adopts voltage-tracing device connection to carry out impedance conversion, then signal is sent into the differential voltage amplifier stage A that is made up of operational amplifier 33,34 and resistive element 35～43
22In become single voltage signal, again with this signal by operational amplifier 44.The voltage negative pressure feedback amplifier stage A that homophase input tracker 45 and element 46～54 are formed
23Amplify, export to indicator gauge meter A after voltage-current converter circuit converts current signal to
24Table meter A
24Can indicate pH measurement result-pH value resistive element 54 in the alkalization water sample and do the usefulness of hydrogen ion measurement temperature compensation.Regulator potentiometer 42 can carry out hydrogen ion measuring unit A
2Zero point adjust and the location.Regulator potentiometer 53 can carry out pH value measuring unit A
2Range is regulated.The Na ion concentration signal processing is identical with above-mentioned pH signal processing.PNa, PH measuring unit A
1A
2Input circuit have two characteristics: one, two high impedance input circuit A
11, A
21Help preventing the contrast electrode polarization, help suppressing
The temperature of instrument is floated; The 2nd, modularization helps the stable of high input impedance, and the anti-adverse environment capability of influence is strong.Simultaneously, this measurement device unit temperature of adopting series connection homophase input follower 33,45 to improve back two-stage is greatly floated performance.
PH regulator circuit unit C contains resistive element 51～54, reverser C
1With power output stage C
2, power output stage C
2By power tube 59, heating element 3,58,60,61 compositions of resistive element, pH measurement output current is converted to voltage signal through resistive element 51～54 and delivers to phase inverter C
1Power controlling output stage C
2Electric current change, the heating power of well heater 3 also changes thereupon, adjusts the base reagent vapor pressure, changes the alkali vapor amount that the water sample that flows is absorbed.Finish the pH regulator function.The concrete course of work in this unit is as follows: when alkalization water sample alkalescence is higher than desired pH value, and pH measuring unit A
2Output current increases, and power tube 59 base potential reduce output current and reduce automatically, and the heating power of well heater 3 reduces, the base reagent solution temperature descends, vapor pressure reduces, and the Air permenbility of the ventilative orifice plate 19 of the box 2 that then alkalizes reduces.Detected water sample absorbs the alkaline gas amount and also reduces thereupon.Ordering about water sample pH value reduces.Vice versa.Element 57 is used to indicate electrical heating power.
Generally at normal temperatures and pressures, when base reagent air pressure can satisfy alkalization when requiring, electric heater 3 is operated in the state of preheating; Have only when alkali under the normal temperature and pressure and steam to press when can not satisfy alkalization and requiring, electric heater 3 is just started working and is in heated condition, forces to improve alkaline vapor pressure and satisfy the alkalization requirement until the base reagent ultimate failure.This device not only can guarantee the stability of pH value, and measurement provides top condition to sodion, has utilized base reagent again to greatest extent, saves medicine.
Power supply unit of voltage regulation D adopts known stabilized voltage supply to get final product.
Claims (9)
1, a kind ofly can regulate the Na ion concentration detector of water sample pH value automatically, form by transmitter B and high resistant converter, wherein transmitter B comprises water sample alkalization device 1 and water sample detection pond 11, the high resistant converter comprises metering circuit unit A, pH regulator circuit unit C and power supply unit of voltage regulation D, and metering circuit unit A is by input high impedance circuit A
11, A
21, differential voltage amplifier stage A
12, A
22, negative feedback voltage amplifier stage A
13, A
23And indicator gauge meter A
14, A
24Serial connection constitutes PNa measuring unit A
1With pH measuring unit A
2, the present invention is characterised in that:
1.1 alkalization box 2 and electric heater 3 are housed in the base reagent case 14 of above-mentioned alkalization device 1, wherein inner alkalization box 2 and the electric heater 3 that is provided with alkalization channel 17, the wherein inner alkalization box 2 that is provided with alkalization channel 17 is horizontally fixed on 14 casees internal upper parts of base reagent case, and the two ends of channel 17 are provided with blasthole 15 and apopore 18.
1.2 said detection cell 11 is provided with measuring chamber 9, a plurality of electrode jacks 10 and the electrode 10 ' drainpipe 12 that is fitted together with each jack sleeve and blowdown plug 13 are located at the cavity 12 that electrode jack 10 is communicated with and the bottom of measuring chamber respectively,
1.3 said high resistant converter includes pH measuring unit A
2And pH regulator circuit unit C, wherein pH measuring unit A
2By input high impedance circuit A
21, differential voltage amplifier stage A
22, voltage negative feedback amplifier stage A
23And indicator gauge meter A
24Compose in series, pH regulator circuit unit C is by phase inverter C
1Serial connection power output stage C
2Form.
2, pick-up unit according to claim 1 is characterized in that the box body top of said alkalization box 2 is provided with ventilative orifice plate 19, and the eyelet position 28 of this orifice plate is in alkalization channel 17 tops.
3, pick-up unit according to claim 1 and 2 is characterized in that the alkalization channel 17 that is provided with in the said alkalization box 2 is circuitous arrangement.
4, pick-up unit according to claim 1 and 2 is characterized in that being provided with in the said alkalization device 1 voltage stabilizing box 6, this box inner chamber and is provided with highly different intermediate plate 24,25 cavity is divided into the overflow chamber
x, pressure stabilizing chamber
yAnd drip chamber
z, water delivering orifice 21,22,23 is arranged at each bottom, chamber, and intermediate plate 24 bottoms are provided with through hole 27.
5, pick-up unit according to claim 4 is characterized in that the pressure stabilizing chamber of said voltage stabilizing box 6
yAnd between alkalization the going out of box 2, the blasthole 22,15 is constant current tube 5.
6, pick-up unit according to claim 5 is characterized in that said constant current tube 5 is equipped with the pinch roller 7 of regulating flow size usefulness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89108981A CN1019859B (en) | 1989-12-09 | 1989-12-09 | Na ion concentration detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN89108981A CN1019859B (en) | 1989-12-09 | 1989-12-09 | Na ion concentration detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1052374A CN1052374A (en) | 1991-06-19 |
| CN1019859B true CN1019859B (en) | 1992-12-30 |
Family
ID=4857814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89108981A Expired CN1019859B (en) | 1989-12-09 | 1989-12-09 | Na ion concentration detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019859B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420942C (en) * | 2005-12-17 | 2008-09-24 | 承慰才 | On-line full automatic sodium ion concentration analyzer |
| JP5035474B2 (en) * | 2009-09-18 | 2012-09-26 | 日立化成工業株式会社 | Ion selective electrode cartridge |
| CN102230858B (en) * | 2011-06-10 | 2012-07-25 | 安徽省电力科学研究院 | On-line testing method for sodium analyzer |
| CN113740407B (en) * | 2021-11-02 | 2022-02-18 | 南京柠檬科技发展有限公司 | Sodium ion concentration analysis measuring equipment |
-
1989
- 1989-12-09 CN CN89108981A patent/CN1019859B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1052374A (en) | 1991-06-19 |
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