CN201392315Y - Automatic on-line monitoring device for ammonia nitrogen - Google Patents
Automatic on-line monitoring device for ammonia nitrogen Download PDFInfo
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- CN201392315Y CN201392315Y CN200820199760U CN200820199760U CN201392315Y CN 201392315 Y CN201392315 Y CN 201392315Y CN 200820199760 U CN200820199760 U CN 200820199760U CN 200820199760 U CN200820199760 U CN 200820199760U CN 201392315 Y CN201392315 Y CN 201392315Y
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- ammonia nitrogen
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- auto monitoring
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 51
- 238000012806 monitoring device Methods 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 49
- 230000002572 peristaltic effect Effects 0.000 claims abstract description 20
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 46
- 239000007788 liquid Substances 0.000 claims description 34
- 229910021529 ammonia Inorganic materials 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 20
- 238000003860 storage Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 239000002537 cosmetic Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 17
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 6
- 239000002352 surface water Substances 0.000 abstract description 6
- 239000010865 sewage Substances 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 34
- 238000000034 method Methods 0.000 description 20
- 238000004448 titration Methods 0.000 description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 6
- 238000004737 colorimetric analysis Methods 0.000 description 6
- 238000004821 distillation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 5
- 238000011109 contamination Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000002798 spectrophotometry method Methods 0.000 description 3
- 239000012086 standard solution Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000628997 Flos Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 229960004889 salicylic acid Drugs 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 241001597008 Nomeidae Species 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- RCTYPNKXASFOBE-UHFFFAOYSA-M chloromercury Chemical compound [Hg]Cl RCTYPNKXASFOBE-UHFFFAOYSA-M 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- XEYBHCRIKKKOSS-UHFFFAOYSA-N disodium;azanylidyneoxidanium;iron(2+);pentacyanide Chemical compound [Na+].[Na+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].[O+]#N XEYBHCRIKKKOSS-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229960002523 mercuric chloride Drugs 0.000 description 1
- LWJROJCJINYWOX-UHFFFAOYSA-L mercury dichloride Chemical compound Cl[Hg]Cl LWJROJCJINYWOX-UHFFFAOYSA-L 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005375 photometry Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229960001860 salicylate Drugs 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229940083618 sodium nitroprusside Drugs 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Abstract
The utility model discloses an automatic on-line monitoring device for ammonia nitrogen, which comprises a sample providing device, a reaction device and a titrating solution storing device, wherein the sample providing device, the reaction device and the titrating solution storing device are orderly connected through pipelines; and metering devices are respectively arranged between the sampling providing device and the reaction device, and between the reaction device and the titrating solution storing device. The utility model is characterized in that the metering device is a peristaltic pump the back end of which is provided with a photoelectric metering pipe. The utility model has the advantages of accurate quantity fixation of reagents and samples, and accurate and stable results, and can be suitable for the on-line monitoring of sewage and surface water with the ammonia nitrogen pollution between 1 to 100 mg/L.
Description
Technical field
The utility model belongs to water quality monitoring instrument field, in particular, relates to the instrument of ammonia nitrogen in a kind of computer-controlled detection water.
Background technology
Ammonia nitrogen (NH
3-N) be a kind of important water environment pollution thing, the concentration of ammonia nitrogen is reflecting that water environment is subjected to ammonia (NH
3) and ammonium (NH
4 +) pollution level.Ammonia nitrogen makes the water body blackout smelly not only as the dissolved oxygen DO (DO) in the reducing substances meeting consume water; And ammonia nitrogen can make surface water " eutrophication " as most important nutritive salt, impels microorganism, micropropagation of plants in the water, absorbs airborne CO
2Form the CHO class organic contamination of water environment; Simultaneously, ammonia nitrogen and its derivant have been proved diseases such as meeting cause cancer in tap water.Therefore, ammonia nitrogen be the ratio organic contaminant (COD) of generally acknowledging more lastingly, more poisonous and hazardous pollutant.
In order to solve above-mentioned water environment pollution problem, need to measure the ammonia nitrogen concentration that contains in the water quality.4 kinds of methods are arranged at present: distillation and titrimetry, nessler reagent colourimetry, salicylic acid spectrophotometric method and ammonia gas-sensing electrode method in the prior art, the distillation titrimetry is applicable to concentration sewage monitoring higher, that emission point is far away, and the latter two are applicable to the surface water monitoring that concentration is very low.
The distillation titrimetry is to generate ammonia according to ammonia (or ammonium) under alkali condition, and ammonia very easily is dissolved in the neutral solution of pH value, utilizes the acid-base neutralization principle then, does the titration absorption liquid with hydrochloric acid or sulfuric acid, just can understand the pollution level of ammonia in the sewage.Ammonia nitrogen in dirty (giving up) water all being transformed into ammonia, then ammonia being displaced from water sample, is to influence determination data for the clean-up performance that prevents dirt (giving up) water; The ammonia of displacing from water sample is absorbed liquid and all absorbs.
The nessler reagent colourimetry is to adopt the alkaline solution and the ammonia react of mercuric iodixde and potassium iodide to generate light red brown colloidization compound, and its colourity is directly proportional with ammonia-nitrogen content, understands the concentration of ammonia nitrogen in the sample by its absorbance of measuring solution; Be applicable to concentration surface water monitoring very low, cleaning; Owing to during this method preparation nessler reagent, need poisonous chemicals mercuric chloride (HgCl
2).In order to prevent polluted surface water, this method has seldom been selected in online detection for use; And the analysis upper limit of this method only is 2mg/L, and the ammonia nitrogen concentration overwhelming majority of dirty (giving up) water does not detect so this method is suitable for the ammonia nitrogen concentration of sewage, industrial waste water between 3～30mg/L.
The salicylic acid spectrophotometric method also is applicable to the low concentration method, and it is according in the presence of sodium nitroprusside, and ammonium and salicylate and hypochlorite ion reaction generate blue compound, can be measured with spectrophotometric method at about 697nm place.It analytically is limited to 1mg/L, and the liquor natrii hypochloritis that this method needs is difficult for preserving, the developing time standard-required must surpass requirements such as 60min, if do not adopt the method for dilution water sample, is unsuitable for the on-line monitoring of floss hole.
The ammonia gas-sensing electrode method, promptly ammonium ion is selected the electrode method, is a kind of detection method that new development is in recent years got up, and often is applied to ammonia nitrogen content mensuration in the water, and the line of also being everlasting uses.Because domestic not with this methodological standardization, the research and development and the production standard of each manufacturer have a long way to go, electrode quality differs; And when monovalent cation concentration was higher in the water, the error of this method was bigger.
Based on above method, prior art has been developed some ammonia nitrogen detecting instruments, ammonia nitrogen online automatic monitor in a kind of water was disclosed on April 16th, 2003 as Chinese patent ZL02235018.7, comprise reactor, absorption cell, conductivity meter and electric apparatus control apparatus, particularly between reactor and absorption cell, be provided with the delivery pipe of a conveying ammonia nitrogen gas, establish the electrode of the mensuration electric conductivity value of a connection conductivity meter in the absorption cell.This patent is that ammonium ion is selected the determination of electrode ammonia nitrogen content, because its method is in the mix of existing market, so this invention is difficult to be applied, and when monovalent cation concentration was higher in water, the result error that this instrument is surveyed was bigger.
Chinese patent ZL03242314.4 discloses a kind of water quality ammonia nitrogen online automatic monitor on October 29th, 2003, be to come some component content in the test water by means of chemistry, the physical property of measuring material, specifically, be to adopt the improvement of photoelectric colorimetry to the structure that a kind of instrument is done of on-line monitoring water quality ammonia nitrogen concentration.It is based on the basic building block of the ammonia nitrogen online automatic monitor of photometry, promptly by the sampling unit, metering units, the reagent storage element, reactor unit, detecting unit, displayed record unit, industry control, data processing and transmission unit are formed, but reactor unit described in the utility model and detecting unit are made up of a photoelectric colorimetry pond.The method that this invention is adopted is to adopt photoelectric colorimetry to measure ammonia nitrogen content in the water.Because adopt the on-line monitoring instrument failure rate height of photoelectric colorimetry, the instrument maintenance cost is bigger.
Because there is defective more or less in the ammonia nitrogen monitoring instrument in the prior art, and present stage environmental protection pay attention to day by day, one can make things convenient for on-line monitoring, and the demand that can solve the defective that has monitor now again is more and more urgent.The present invention comes therefrom.
The utility model content
The utility model provides a kind of new ammonia nitrogen pick-up unit, has solved problems such as ammonia nitrogen monitor error is big in the prior art, failure rate is higher, maintenance cost is bigger.
In order to solve the above-mentioned problems in the prior art, the solution that the utility model provides is as follows:
A kind of ammonia nitrogen online auto monitoring device, the sample generator, reaction unit, the vs storage device that comprise pipeline connection successively, between described sample generator front end and reaction unit, vs storage device, measuring apparatus is set respectively, it is characterized in that described measuring apparatus is the peristaltic pump that the rear end is provided with the photoelectrometer buret.
Preferably, described photoelectrometer buret comprises the gauge line of determining volume, and described gauge line arranged outside has photoelectric detector, and photoelectric detector links to each other by the programmable logic controller (PLC) of circuit with the control peristaltic pump.
Preferably, described photoelectric detector comprises that being in metering emissive source and the metering that the gauge line outside distributes accepts the source, and metering is accepted the source and accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that the metering emissive source sends.
Preferably, in described reaction unit arranged outside the drop reaction detecting device is arranged, the drop reaction detecting device links to each other by the programmable logic controller (PLC) of circuit with the control peristaltic pump.
Preferably, described drop reaction detecting device comprises and is in the emissive source that the reaction unit outside distributes and accepts the source, and the source of acceptance is accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that emissive source sends.
Preferably, be provided with various selector valve between sample generator and reaction unit, the unidirectional selection of described multi-way selecting valve opens and closes sample generator, measuring apparatus, no hartshorn bottle, waste liquid bottle, absorbing agent bottle, bottle for handling liquid toilet or cosmetic substance, evicts the connection of agent bottle and sample bottle from.
Preferably, described sample generator is the desorb stripping bottle with alkaline desorb stripping liquid, is provided with the ammonia absorption liquid in described reaction unit, and the gas that discharges from desorb stripping bottle feeds the ammonia absorption liquid by pipeline.
Preferably, described ammonia nitrogen online auto monitoring device also is provided with temperature control equipment, and described temperature control equipment is communicated with heating with reaction unit, sample generator respectively.
Preferably, described temperature control equipment comprises stripping thermopair and absorption thermopair, and described stripping thermopair is arranged in the desorb stripping bottle, and described absorption thermopair is arranged on the reaction unit lower end.
Preferably, be provided with the elastic tube in the pump case passage in the described peristaltic pump, the elastic tube inboard is the roller of eight shaft step motors, and described programmable logic controller (PLC) is connected on the described multiaxis stepper motor.
Preferably, described ammonia nitrogen online auto monitoring device is by data transmission device and tele-control system contact; Described data transmission device comprises telephone network, GSM mobile handset short message net, GPRS or cdma network.
Owing to adopt the rear end to be provided with the measuring apparatus of the peristaltic pump of photoelectrometer buret, overcome the error that peristaltic pump causes owing to a period of time uses or other reason causes instability of flow in the technical solution of the present invention; And adopt peristaltic pump negative pressure suction to carry out collected specimens and reagent, and guarantee the contact of liquid discord pump line, fundamentally stopped the pollution of pump line to liquid, also avoided the pump line corrosion simultaneously, prolonged the life-span of peristaltic pump.Simultaneously, in preferred version, adopt high performance photoelectric technology to judge titration end-point, improved the accuracy of judgement degree of titration end-point greatly, and directly do not contacted with liquid in the reaction unit outside, avoided some problems of electrode method, shorter as electrode pair liquid contamination, electrode life.
Adopt desorb stripping bottle to discharge gas such as NH in the technical solution of the present invention with alkaline solution
3Feed in the ammonia absorption liquid by pipeline, serviceability temperature control device control is simultaneously heated desorb stripping bottle.Can prevent from like this to disturb and guarantee that ammonia nitrogen displaces rate near more than 99.95%, in 20min with air stripping with drive ammonia and go out desorb stripping bottle, keep liquid more than 98 ℃, be little fluidized state (temperature can suitably be adjusted according to sea level elevation), than the simple way of distillation drive the time spent short, not entrained liquids, displace thoroughly etc.; The ammonia of being displaced is absorbed by the absorption liquid of the formulated in the reaction unit, and absorption process serviceability temperature control device control absorption temperature guarantees the ammonia absorptivity near more than 99.95%, and is not subjected to the influence of environmental baselines such as temperature.
The ammonia nitrogen online auto monitoring device that the inventor obtains through long-term exploratory development is based on CNS " the mensuration distillation and the titrimetry of water quality ammonium " (GB7478-87), can directly not use so do not need to compare conversion by the data that titration obtained, the result is more accurate reliable.Operation steps is identical with chemico-analytic principle among the present invention, helps operator's left-hand seat and operation.And, the device that the present invention adopts in strictly observing standard condition and the basis of step on the liquid consumption that uses when adopting programmable logic controller (PLC) controls reaction end and accurate Calculation drop reaction again, make things convenient for the automation mechanized operation of instrument, can reach the precision higher again than prior art.
The ammonia nitrogen online auto monitoring device of inventor's design can pass through remote data transmission technology flexible networking, can realize that telephone network, GSM mobile handset short message net, GPRS or the real-time Surveillance center of cdma network to the reverse warning to Surveillance center of Remote, remote measurement and the monitoring point of monitoring point, can realize the technical requirement of on-line monitoring like this.
In addition, adopt multi-way selecting valve in the preferred version of the present invention, passage is versatile and flexible, has abandoned expensive diaphragm electromagnetic valve, greatly reduces maintenance and maintenance cost.
The scope that technical scheme of the present invention is measured can reach 1.0～100.0mg/L, even it is higher, thereby technical scheme of the present invention can be used for dirt (giving up) water and heavy contamination, and (ammonia and nitrogen pollution surpasses the on-line monitoring of 1～2mg/L) water quality of river treatment plant floss hole situation up to standard, also can be used for the monitoring of surface water quality.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment water quality ammonia nitrogen automatic on-line monitoring instrument.
Wherein, 1 is the wriggling volume pump, and 2 is the drop reaction detecting device, 3 is gauge line, 4 is photoelectric detector, and 5 is the vs storage device, and 6 are desorb stripping bottle, 7 is reaction unit, 8 is that temperature control equipment, 10 is multi-way selecting valve, and 11 are no hartshorn bottle, and 12 is waste liquid bottle, 13 is sample bottle, and 14 is that absorbing agent bottle, 15 is for evicting the agent bottle from.
Embodiment
In order to describe the technical solution of the utility model in detail, below describe in detail by specific embodiment:
Embodiment such as Fig. 1, a kind of water quality ammonia nitrogen automatic on-line monitoring instrument, comprise the desorb stripping bottle 6 with alkaline desorb stripping liquid of pipeline connection successively, reaction unit 7, vs storage device 5, at the sample generator, between the reaction unit and reaction unit, measuring apparatus is set respectively between the vs storage device, this measuring apparatus is the peristaltic pump 1 that the rear end is provided with the photoelectrometer buret, be provided with the elastic tube in the pump case passage in the peristaltic pump, the elastic tube inboard is the roller of eight shaft step motors, and described programmable logic controller (PLC) is connected on the described multiaxis stepper motor.This photoelectrometer buret comprises the gauge line 3 of determining volume, the gauge line arranged outside has photoelectric detector 4, photoelectric detector comprises that being in metering emissive source and the metering that the gauge line both sides distribute accepts the source, and metering is accepted the source and accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that the metering emissive source sends.In the reaction unit arranged outside drop reaction detecting device 2 is arranged, the drop reaction detecting device comprises the emissive source that is in the distribution of reaction unit both sides and accepts the source that the drop reaction detecting device also links to each other by the programmable logic controller (PLC) of circuit with the control peristaltic pump.
Be provided with multi-way selecting valve 10 between sample generator and reaction unit, the unidirectional selection of described multi-way selecting valve opens and closes sample generator, measuring apparatus, no hartshorn bottle 11, waste liquid bottle 12, absorbing agent bottle 14, bottle for handling liquid toilet or cosmetic substance, evicts the connection of agent bottle 15 and sample bottle 13 from.
The sample generator is the desorb stripping bottle with alkaline desorb stripping liquid, is provided with the ammonia absorption liquid in described reaction unit, and the gas that discharges from desorb stripping bottle feeds the ammonia absorption liquid by pipeline.Ammonia nitrogen online auto monitoring device also is provided with temperature control equipment 8, comprise the stripping thermopair and absorb thermopair, described stripping thermopair is arranged in the desorb stripping bottle, described absorption thermopair is arranged on the reaction unit lower end, and temperature control equipment is communicated with heating with reaction unit, sample generator respectively.
When measuring after cyclic process begins, wash the digestion instrument of each connecting line, gauge line and the setting of sample generator front end with new water sample, to remove the chaff interference that remains on the pipeline and the chaff interference in the sample.Use the measuring apparatus peristaltic pump that water sample and desorb stripping liquid successively are added in the desorb stripping bottle, desorb stripping 20min under high temperature and alkali condition, ammonia is entered in the reaction unit by air stripping, and the condition that the absorption liquid of being joined by the spy at reaction unit is controlled temperature (as 30 ℃) in strictness absorbs.In desorb and absorption process, can pass through the bubbling mixing material, guarantee that the solution in desorb stripping bottle, the reaction unit mixes fully, to have fine desorb and acceptance condition.Under the condition of strictness control temperature, carry out titration then, utilize drop reaction detecting device such as photoelectric detector to judge titration end-point with hydrochloric acid standard solution.This device can utilize consumption, the hydrochloric acid standard solution consumption of blank hydrochloric acid standard solution, the volume of water sample, calculates the ammonia nitrogen of water sample.The error of indication of this device is not more than ± and 10%, stability error is not more than ± 10%, reproducibility error is not more than ± 3%, span drift is not more than ± 10%.
Because water sample and solution adopt peristaltic pump negative pressure suction in measuring, directly do not contact and stopped pump line to the pollution of liquid with avoided corrosion and the chaff interference pollution of pump line with peristaltic pump tube, adopt the photoelectrometer buret simultaneously, prevent the error of the liquid volume added that causes owing to the peristaltic pump fluctuations in discharge.Adopt high performance photoelectric technology, improved the accuracy of judgement degree of titration end-point greatly, and directly do not contact with liquid, avoided the problem of electrode method: electrode pair liquid contamination, electrode life are shorter.
Above-mentioned example only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalent transformation or modifications of being done according to the utility model spirit all should be encompassed within the protection domain of the present utility model.
Claims (10)
1, a kind of ammonia nitrogen online auto monitoring device, the sample generator, reaction unit, the vs storage device that comprise pipeline connection successively, between described sample generator front end and reaction unit, vs storage device, measuring apparatus is set respectively, it is characterized in that described measuring apparatus is the peristaltic pump that the rear end is provided with the photoelectrometer buret.
2, ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that described photoelectrometer buret comprises the gauge line of determining volume, described gauge line arranged outside has photoelectric detector, and photoelectric detector links to each other by the programmable logic controller (PLC) of circuit with the control peristaltic pump.
3, ammonia nitrogen online auto monitoring device according to claim 2, it is characterized in that described photoelectric detector comprises that being in metering emissive source and the metering that the gauge line outside distributes accepts the source, metering is accepted the source and is accepted to send programmable logic controller (PLC) to by photoelectric switching circuit behind the light signal that the metering emissive source sends.
4, ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that the drop reaction detecting device being arranged in described reaction unit arranged outside, described drop reaction detecting device comprises and is in the emissive source that the reaction unit outside distributes and accepts the source, and the programmable logic controller (PLC) of control peristaltic pump is accepted to send to by photoelectric switching circuit behind the light signal that emissive source sends in the source of acceptance.
5, ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that being provided with multi-way selecting valve between sample generator and reaction unit, the unidirectional selection of described multi-way selecting valve opens and closes sample generator, measuring apparatus, no hartshorn bottle, waste liquid bottle, absorbing agent bottle, bottle for handling liquid toilet or cosmetic substance, evicts the connection of agent bottle and sample bottle from.
6, ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that described sample generator is the desorb stripping bottle with alkaline desorb stripping liquid, be provided with the ammonia absorption liquid in described reaction unit, the gas that discharges from desorb stripping bottle feeds the ammonia absorption liquid by pipeline.
7, ammonia nitrogen online auto monitoring device according to claim 1 is characterized in that described ammonia nitrogen online auto monitoring device also is provided with temperature control equipment, and described temperature control equipment is communicated with heating with reaction unit, sample generator respectively.
8, ammonia nitrogen online auto monitoring device according to claim 7, it is characterized in that described temperature control equipment comprises the stripping thermopair and absorbs thermopair, described stripping thermopair is arranged in the desorb stripping bottle, and described absorption thermopair is arranged on the reaction unit lower end.
9, ammonia nitrogen online auto monitoring device according to claim 1, it is characterized in that being provided with in the described peristaltic pump elastic tube in the pump case passage, the elastic tube inboard is the roller of eight shaft step motors, and described programmable logic controller (PLC) is connected on the described multiaxis stepper motor.
10, ammonia nitrogen online auto monitoring device according to claim 1 is characterized in that described ammonia nitrogen online auto monitoring device is by data transmission device and tele-control system contact; Described data transmission device comprises telephone network, GSM mobile handset short message net, GPRS or cdma network.
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| CN200820199760U CN201392315Y (en) | 2008-12-26 | 2008-12-26 | Automatic on-line monitoring device for ammonia nitrogen |
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| CN200820199760U CN201392315Y (en) | 2008-12-26 | 2008-12-26 | Automatic on-line monitoring device for ammonia nitrogen |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825641A (en) * | 2010-04-22 | 2010-09-08 | 马三剑 | Water quality total nitrogen on-line automatic monitoring device |
| CN102374989A (en) * | 2010-08-20 | 2012-03-14 | 北京吉天仪器有限公司 | Automatic analyzer for determining ammonia nitrogen in water and automatic analytic method thereof |
| CN106872385A (en) * | 2016-12-31 | 2017-06-20 | 新昌县迪斯曼科技有限公司 | A kind of chemical fertilizer it is water-soluble go out nitrogen nutrient on-line measuring device |
| CN107515272A (en) * | 2017-08-30 | 2017-12-26 | 浙江工业大学 | A kind of ammonia nitrogen on-line computing model based on distillation titration |
| CN108061730A (en) * | 2016-11-09 | 2018-05-22 | 郑州富铭环保科技有限公司 | A kind of organics removal is to on-line determination ammonia nitrogen device and interference method |
| CN109342349A (en) * | 2018-11-29 | 2019-02-15 | 福建省吉龙德环保科技有限公司 | A kind of TOC wet-chemical analysis device and method |
| CN109358012A (en) * | 2018-11-27 | 2019-02-19 | 成都海兰天澄科技股份有限公司 | A kind of Water quality ammonia nitrogen device for fast detecting and method |
| CN111505202A (en) * | 2020-04-26 | 2020-08-07 | 广东省测试分析研究所（中国广州分析测试中心） | Multifunctional dilution/titration device |
| CN112903414A (en) * | 2021-02-08 | 2021-06-04 | 杭州帆昂环保科技有限公司 | Multi-parameter automatic water quality analysis method and system |
-
2008
- 2008-12-26 CN CN200820199760U patent/CN201392315Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101825641A (en) * | 2010-04-22 | 2010-09-08 | 马三剑 | Water quality total nitrogen on-line automatic monitoring device |
| CN101825641B (en) * | 2010-04-22 | 2013-03-27 | 马三剑 | Water quality total nitrogen on-line automatic monitoring device |
| CN102374989A (en) * | 2010-08-20 | 2012-03-14 | 北京吉天仪器有限公司 | Automatic analyzer for determining ammonia nitrogen in water and automatic analytic method thereof |
| CN108061730A (en) * | 2016-11-09 | 2018-05-22 | 郑州富铭环保科技有限公司 | A kind of organics removal is to on-line determination ammonia nitrogen device and interference method |
| CN106872385A (en) * | 2016-12-31 | 2017-06-20 | 新昌县迪斯曼科技有限公司 | A kind of chemical fertilizer it is water-soluble go out nitrogen nutrient on-line measuring device |
| CN107515272A (en) * | 2017-08-30 | 2017-12-26 | 浙江工业大学 | A kind of ammonia nitrogen on-line computing model based on distillation titration |
| CN107515272B (en) * | 2017-08-30 | 2024-01-16 | 浙江工业大学 | Ammonia nitrogen on-line monitoring appearance based on distillation-titration method |
| CN109358012A (en) * | 2018-11-27 | 2019-02-19 | 成都海兰天澄科技股份有限公司 | A kind of Water quality ammonia nitrogen device for fast detecting and method |
| CN109342349A (en) * | 2018-11-29 | 2019-02-15 | 福建省吉龙德环保科技有限公司 | A kind of TOC wet-chemical analysis device and method |
| CN109342349B (en) * | 2018-11-29 | 2020-05-08 | 福建省吉龙德环保科技有限公司 | TOC wet chemical analysis device and method |
| CN111505202A (en) * | 2020-04-26 | 2020-08-07 | 广东省测试分析研究所（中国广州分析测试中心） | Multifunctional dilution/titration device |
| CN112903414A (en) * | 2021-02-08 | 2021-06-04 | 杭州帆昂环保科技有限公司 | Multi-parameter automatic water quality analysis method and system |
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