CN1382977A - Water hardness detector of ion-exchange conductivity difference type water softening equipment and its detection method - Google Patents
Water hardness detector of ion-exchange conductivity difference type water softening equipment and its detection method Download PDFInfo
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- CN1382977A CN1382977A CN 01106656 CN01106656A CN1382977A CN 1382977 A CN1382977 A CN 1382977A CN 01106656 CN01106656 CN 01106656 CN 01106656 A CN01106656 A CN 01106656A CN 1382977 A CN1382977 A CN 1382977A
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Abstract
The invention discloses the detector and the method for testing the hardness of the water from the ion exchange softener in type of conductance difference. The softener makes the running tested water sample and the solution of the complexing agent feed to the container for accepting both of the water sample and the complexing agent in scaled. The quantity added the complexing agent on its equal or a little larger than the molal weight, in which the complexing agent would be disabled to the hardness of the water from the softener. With the water sample mixed evenly being divided into two sections, the one section of the water sample flower across the sodium type ion exchange column, the other flows across the inert resin column. Finally, each section passes through own conductance electrode pool.
Description
The invention belongs to water analysis chemistry and water-treatment technology field, relate to a kind of water hardness detector of ion-exchange conductivity difference type water softening equipment and detection method thereof.
Sodion exchange is softening be use water technology very widely.The supervision of hardness was leaked in water outlet to demineralizer, did not still have reliable in-line meter at present and can select for use, generally the method that all adopts manual titration to detect.And the method that adopts manual titration to detect not only can make workload very big because of timing mensuration, and owing to can only adopt the interruption assay method, takes place easily to rise rapidly because of demineralizer goes out the water hardness short time, and fails situation out of service in time.Under the condition that does not possess regularly manual titration (as most full-automatic demineralizer), have to usually take when demineralizer lost efficacy far away, promptly stop to make water and the method for regenerating.This has not only obviously reduced water production in periodic mode, and causes the waste of regenerant salt and to the salt pollution at water source, also can be under the unsettled situation of water inlet hardness, and because of raising, certain period water inlet hardness cause in the water outlet hardness to leak in a large number.
The sodion that is the water outlet of continuous online supervision Hydrogen base exchanger leaks, and a kind of differential conductance method sun bed water outlet sodium ion densimeter was once arranged, referring to the 239th page of " Thermal Power Station's water treatment " first volume of hydraulic and electric engineering publishing house second edition in 1984.Its principle is to make sun bed water outlet water sample be divided into two strands, the conductance electrode pond of flowing through behind one small-sized Hydrogen ion exchange column of flowing through, the difference of two measured conductivity of electrode is measured in another thigh another conductance electrode pond of then flowing through, and can be scaled the water outlet Na ion concentration.When not having sodion in the water outlet of sun bed, the conductivity that two conductance electrode ponds record equates, leaks out-of-date conductivity of then flowing through hydrogen ion exchange column water sample as sodion and will be higher than the latter.The Na ion concentration that water outlet was leaked is high more, and the two electric conductivity difference is big more.If but directly demineralizer water outlet water sample is divided into two strands according to this principle, one small-sized sodion exchange column of flowing through, then its to go out electrical conductivity of water will be very little with the difference that goes out water conductivity without exchange column, thereby the sensitivity that demineralizer is gone out water hardness detection will be very low.
Goal of the invention of the present invention is exactly according to a kind of can being used for that the deficiency that above-mentioned situation exists provides demineralizer water outlet or other low-hardness waters to be carried out on-line monitoring and can be judged in time that demineralizer goes out water hardness detector of ion-exchange conductivity difference type water softening equipment and detection method thereof that the water hardness reaches failure criteria.
Goal of the invention of the present invention is to realize like this.Water hardness detector of ion-exchange conductivity difference type water softening equipment is made of small-sized sodium type ion exchange column, conductance electrode pond, electric signal detecting device, inlet and outlet pipe.Demineralizer water outlet stopple coupon 1 is connected with the import that the complexing agent certainty ratio adds device 2, and its another import is connected with the vent pipe of enveloping agent solution reserve tank 3; The outlet that described complexing agent certainty ratio adds device 2 is connected with an end of three-way pipe 4 by rising pipe, the two ends in addition of its three-way pipe 4 link to each other by the import of rising pipe with small-sized sodium type ion exchange column 5 and small-sized inert plastic post 6 respectively, the outlet of two small-sized posts is connected with conductance electrode pond 7,8 respectively by rising pipe, can make two strands of water samples from separately the time like this, can be through after same and extraneous heat transfer boundary condition and same period, with in a flash, arrive conductance electrode pond separately respectively again; Described small-sized inert plastic post 6 also can adopt other types to have the passage of a constant volume; The electrode in described conductance electrode pond 7,8 is connected with electric signal detecting device 9 respectively.
Ion-exchange conductivity difference type demineralizer water outlet hardness detection method is: when detected water sample flows into the complexing agent certainty ratio and adds device 2, enveloping agent solution also flows into the complexing agent certainty ratio and adds device 2, and join in the water sample, the addition of complexing agent be equal to or slightly greater than can complexing the molar weight of demineralizer inefficacy hardness of regulation, after the water sample that mixes flows out network and agent certainty ratio adding device 2, make this water sample be divided into two strands through three-way pipe, the conductance electrode pond 8 of flowing through behind the small-sized inert plastic post 6 of one stock-traders' know-how, another thigh then passes through small-sized sodium type ion exchange resin column 5, make ion exchange resin capture in the water sample calcium with the complexing agent complexing, the conductance electrode pond 7 of flowing through after the magnesium ion, at this moment, the electricity in 9 pairs two conductance electrode ponds of electric signal detecting device is led and is measured, and converts and be shown as the hardness number of water outlet according to the two difference.Resin can use about 1 thoughtful 1 month in the exchange column, need regenerate or change the resin that regeneration is got well then.
The principle of work of this instrument is: if do not have hardness in the demineralizer water outlet, then network in two strands of current and agent all can remain not complex status, thereby both conductivity will not have difference behind flow through respectively sodium type ion exchange column and inert plastic post.And when in the demineralizer water outlet hardness being arranged, complexing can take place in the complexing agent of the calcium in the current, magnesium ion and adding, after one current wherein are through inert plastic post during again by water outlet conductance electrode pond, can continue keeping its complex status, thereby its conductive capability weakens, and promptly the conductivity of this strand water sample can be low slightly when not having hardness in the water outlet; And another strand current are through after having the sodion exchange column of certain floor height, the overwhelming majority can be switched to resin by the calcium of complexing, magnesium ion and get on, make network and agent return to the state of not complexing, thereby the conductivity of this water sample can return to the level when not having hardness near the demineralizer water outlet.It is high more that demineralizer goes out the water hardness, and two bursts of electrical conductivity of water differences are just big more, and the hardness number in the difference of the two and the demineralizer water outlet water sample has certain functional relation, thereby can and will go out the water hardness by electric signal detecting device mensuration and show.
Water hardness detector of ion-exchange conductivity difference type water softening equipment manufactured according to the present invention, can realize on-line monitoring (also can be used for being interrupted monitoring) is carried out in demineralizer water outlet or other low-hardness waters, and can allow complexing agent (as EDTA) additional proportion that certain error (± 10%) is arranged, in water inlet salt content and the bigger situation of hardness fluctuations, applicability is preferably arranged also.Use this instrument to reduce production costs, save great amount of manpower, financial resources, have higher economic value, popularizing application prospect is considerable.
The invention will be further described below in conjunction with Figure of description.
Accompanying drawing 1 is structural representation of the present invention.
Among Fig. 1, demineralizer water outlet stopple coupon 1 and complexing agent certainty ratio add device 2 and are connected, and enveloping agent solution reserve tank 3 is made by organic glass, and its vent pipe also adds device 2 with the complexing agent certainty ratio and is connected; The outlet conduit that the complexing agent certainty ratio adds device 2 is connected with an end of three-way pipe 4, the two ends in addition of its three-way pipe 4 are connected by the top of pipeline with small-sized sodium type ion exchange column 5 and small-sized inert plastic post 6 respectively, two small-sized posts adopt Φ 15-20mm, the container of resin floor height 35cm, their bottom is connected with conductance electrode pond 7,8 respectively by rising pipe, and the electrode in two conductance electrode ponds is connected with electric signal detecting device 9 respectively by lead.
With concrete implementation data is example.The wuhan yangtze river water of getting behind the clarification filtration is water sample, the water sample water temperature is 18 ℃, compound concentration is the EDTA solution of 2.42mmol/L, entering the water sample of complexing agent certainty ratio adding device 2 and the ratio of EDTA solution simultaneously is 100: 9, after the water sample that mixes flows out network and agent certainty ratio adding device 2, make this water sample be divided into two strands through three-way pipe, the conductance electrode pond 8 of flowing through behind the small-sized inert plastic post 6 of one stock-traders' know-how, another thigh is then through the conductance electrode pond 7 of flowing through behind the small-sized sodium type ion exchange resin column 5, record through electric signal detecting device 9: both conductivity were not 188 μ s/cm when water outlet had hardness, and promptly difference is 0; When going out the water hardness and reaching the failure criteria 0.2mmol/L of regulation, both conductivity differences are about 12 μ s/cm.
The registration of this instrument lagged behind about 3-5 minute.
Claims (3)
1. water hardness detector of ion-exchange conductivity difference type water softening equipment that is constituted by small-sized sodium type ion exchange column, conductance electrode pond, electric signal detecting device, inlet and outlet pipe, it is characterized in that: demineralizer water outlet stopple coupon (1) is connected with the import that the complexing agent certainty ratio adds device (2), and its another import is connected with the vent pipe of enveloping agent solution reserve tank (3); The outlet that described complexing agent certainty ratio adds device (2) is connected by the end of rising pipe with three-way pipe (4), the two ends in addition of its three-way pipe (4) link to each other with the import of small-sized sodium type ion exchange column (5) with small-sized inert plastic post (6) by rising pipe respectively, the outlet of two small-sized posts is connected with conductance electrode pond (7), (8) respectively by rising pipe, and the electrode of its conductance electrode pond (7), (8) is connected with electric signal detecting device (9) respectively.
2. according to claims 1 described water hardness detector of ion-exchange conductivity difference type water softening equipment, it is characterized in that: described small-sized inert plastic post (6) can adopt other types to have the passage of a constant volume.
3. the described ion-exchange conductivity difference type demineralizer of claim 1 water outlet hardness detection method, it is characterized in that: when detected water sample flows into complexing agent certainty ratio adding device (2), enveloping agent solution also flows into the complexing agent certainty ratio and adds device (2), and join in the water sample, the addition of complexing agent be equal to or slightly greater than can complexing the molar weight of demineralizer inefficacy hardness of regulation, after the water sample that mixes flows out network and agent certainty ratio adding device (2), make this water sample be divided into two strands through three-way pipe, the conductance electrode pond (8) of flowing through behind the small-sized inert plastic post of one stock-traders' know-how (6), another strand is then by the conductance electrode pond (7) of flowing through behind the small-sized sodium type ion exchange resin column (5), at this moment, electric signal detecting device (9) demonstrates water hardness value by the difference of measuring both conductivity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01106656 CN1382977A (en) | 2001-04-24 | 2001-04-24 | Water hardness detector of ion-exchange conductivity difference type water softening equipment and its detection method |
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| CN 01106656 CN1382977A (en) | 2001-04-24 | 2001-04-24 | Water hardness detector of ion-exchange conductivity difference type water softening equipment and its detection method |
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| CN1382977A true CN1382977A (en) | 2002-12-04 |
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| CN 01106656 Pending CN1382977A (en) | 2001-04-24 | 2001-04-24 | Water hardness detector of ion-exchange conductivity difference type water softening equipment and its detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693219A (en) * | 2018-06-20 | 2018-10-23 | 湖南凯誉电气科技有限公司 | A kind of device and its detection method detecting water hardness according to measurement conductivity |
| WO2023010802A1 (en) * | 2021-08-03 | 2023-02-09 | 佛山市云米电器科技有限公司 | Water sample hardness detection method based on water sample electrical signal change |
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2001
- 2001-04-24 CN CN 01106656 patent/CN1382977A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108693219A (en) * | 2018-06-20 | 2018-10-23 | 湖南凯誉电气科技有限公司 | A kind of device and its detection method detecting water hardness according to measurement conductivity |
| CN108693219B (en) * | 2018-06-20 | 2024-02-27 | 湖南康养家建造科技股份有限公司 | Device for detecting water hardness according to conductivity measurement and detection method thereof |
| WO2023010802A1 (en) * | 2021-08-03 | 2023-02-09 | 佛山市云米电器科技有限公司 | Water sample hardness detection method based on water sample electrical signal change |
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