CN206618713U - A kind of Water quality ammonia nitrogen on-Line Monitor Device - Google Patents
A kind of Water quality ammonia nitrogen on-Line Monitor Device Download PDFInfo
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- CN206618713U CN206618713U CN201720296110.6U CN201720296110U CN206618713U CN 206618713 U CN206618713 U CN 206618713U CN 201720296110 U CN201720296110 U CN 201720296110U CN 206618713 U CN206618713 U CN 206618713U
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- reaction tank
- ammonia nitrogen
- water quality
- monitor device
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Abstract
The utility model provides a kind of Water quality ammonia nitrogen on-Line Monitor Device, the reacting part being connected including sample presentation portion and with sample presentation portion, the sample presentation portion includes valve group, is connected at least one peristaltic pump and the pipeline of connecting valve group and at least one peristaltic pump of valve group and reacting part, the reacting part includes reaction tank, connects the drain line of reaction tank, reaction tank bottom is mounted with stirring motor, stirrer is arranged on reaction tank bottom, thermostat module is arranged on above reaction tank, and ammonia gas-sensing electrode is inserted in reaction tank by thermostat module.The utility model measurement Water quality ammonia nitrogen on-Line Monitor Device is not influenceed by water body color, turbidity and particulate matter, and reagent is nontoxic, will not cause secondary pollution to environment.
Description
Technical field
The utility model is related to monitoring water quality on line field, relates more specifically to a kind of Water quality ammonia nitrogen on-Line Monitor Device.
Background technology
Ammonia nitrogen is very high as main exceeded pollutant frequency of occurrences in seven big water systems, and ammonia and nitrogen pollution is nationwide dirt
Dye problem.From existing online nh 3-n analyser on the market mainly using two kinds of analysis methods：One kind is electrode method, is suitable for each
The monitoring of class water quality, interference free performance is stronger；Another is photometry, is generally used for cleaning surface water, to interfering ion and turbid
Degree there are certain requirements.
Wherein electrode method have that reagent dosage is few, preparation of reagents is fairly simple, instrument maintenance is more convenient, reagent is nontoxic,
The advantages of analytical cycle is short.The use of electrode method instrument in recent years is spent considerably beyond optical analysis extensively.Therefore, it is electric
Pole method will replace photometry to predominantly detect method as NH 3.
Detection method for Water quality ammonia nitrogen is broadly divided into photometry and the class of electrode method two, at present the water quality of main flow on the market
Ammonia nitrogen on-line monitoring is basic to be used based on photometry, and uses the producer of electrode method few, causes the main cause of case above
For photometry is relatively low compared to its technical difficulty for electrode method, development cost is low, structure is relatively easy.But surveyed using photometry
Amount Water quality ammonia nitrogen exist the secondary toxic contaminants of reagent, measurement result influenceed by factors such as water body color, turbidity, operation cost it is higher
The problems such as, and had the advantage that using electrode rule：A, measurement result are not influenceed by factors such as water body color, turbidity；It is b, same
When its reagent will not cause secondary pollution to environment；C and the extremely low advantage of operation maintenance cost；D, measurement period are short.It is same in this
Shi Caiyong electrode methods need to solve following several key points to Water quality ammonia nitrogen measurement：A, ammonia gas-sensing electrode belong to first device of ultra-high-impedance
Part, its signal transacting difficulty is very big；B, ammonia gas-sensing electrode are influenced by ambient temperature very big, easily drift about, and cause measurement electricity
Pressure is difficult stable；C, ammonia gas-sensing electrode are when ammonia nitrogen concentration is relatively low, and electrode potential is non-linear, lead to not measurement concentration very low
Ammonia nitrogen water sample.Therefore, develop a use electrode method and realize that the device of Water quality ammonia nitrogen monitoring not only has preferably detection
Effect, while can also solve currently employed photometry has reagent secondary pollution problems.
Utility model content
The purpose of this utility model is that the defect existed to solve above-mentioned prior art exists there is provided a kind of Water quality ammonia nitrogen
Line monitoring device.
To achieve the above object, the utility model provides a kind of Water quality ammonia nitrogen on-Line Monitor Device, including sample presentation portion and with
The reacting part that sample presentation portion is connected, the sample presentation portion includes valve group, is connected to valve group and at least one wriggling of reacting part
The pipeline of pump and connecting valve group and at least one peristaltic pump, the reacting part includes reaction tank, connects the discharging tube of reaction tank
Road, reaction tank bottom is mounted with stirring motor, and stirrer is arranged on reaction tank bottom, and thermostat module is arranged on above reaction tank,
And ammonia gas-sensing electrode is inserted in reaction tank by thermostat module.
Preferably, the valve group is five conjuncted valve groups.
Preferably, described five conjuncted valve groups include reserving valve, the valve of standard liquid one, the valve of cleaning fluid one, the valve of blank water one, air one
Valve, water sample valve, the valve of standard liquid two, the valve of cleaning fluid two, the valve of blank water two, the valve of air two.
Preferably, the peristaltic pump includes the dual-channel peristaltic pump being arranged between valve group and reaction tank.
Preferably, it is provided with three-way connection between the dual-channel peristaltic pump and reaction tank.
Preferably, in addition to reaction tank the single channel peristaltic pump of alkaline reagent is pumped.
Preferably, it is provided with three-way connection between the single channel peristaltic pump and reaction tank.
The utility model also provides a kind of application method of Water quality ammonia nitrogen on-Line Monitor Device, and methods described includes：Pass through
Peristaltic pump is grouped to reaction tank pumping sample introduction, measures respectively, demarcates, according to current potential and corresponding concentration can draw corresponding song
Line and the concentration for calculating water sample, reagent, standard liquid and water sample are carried out by way of two peristaltic pumps and two five conjuncted valve groups
Etc. the sample introduction of component, while being quantified completely by the rotation of step motor control peristaltic pump in whole sample introduction process, often
Secondary measurement is demarcated to instrument, determines flow first to be measured to mark one+blank water, then one+water sample of mark is carried out
Measurement, is finally measured to mark one+mark two again, and corresponding song can be drawn by the current potential and corresponding concentration of mark one and mark two
Line, the concentration of water sample can be calculated according to the current potential of curve negotiating water sample.
Preferably, the measurement of rower one and mark two is entered in the measurement every time to water sample, while being added when measuring water sample solid
Determine the mark one of concentration.
Preferably, the measurable ammonia nitrogen concentration of described device is less than 0.1mg/L water sample.
The decision method ammonia nitrogen on-Line Monitor Device determination of nitrite in water that the utility model is provided, with advantages below：
1), measurement is not influenceed by water body color, turbidity and particulate matter；
2), compared to traditional electrode method instrument, 0.01mg/L can reach using the instrument detection limit after standard addition method；
3), single branch electrode can realize the test that ammonia nitrogen concentration is all water samples of 0~1000mg/L；
4), operation cost is only the 1/5 of photometry；
5), reagent is nontoxic, will not cause secondary pollution to environment.
Brief description of the drawings
Fig. 1 is the structural representation of Water quality ammonia nitrogen on-Line Monitor Device.
Embodiment
The principle of electrode method measurement Water quality ammonia nitrogen be in relation between electrode potential and concentration meet can this special formula
Journey, it is specific as follows：
E=E0+RT/nF*lnC
E0：The current potential that pH electrodes are produced when H ionic activities are 1；
R：Gas constant；
T：Thermodynamic equilibrium constant；
F：Faraday constant；
n：The receiving and losing electrons number of reaction is participated in, is herein 1；
C：Ammonia nitrogen concentration in the aqueous solution；
Being derived according to Nernst equation to obtain：
According to the derivation formula of Nernst equation：E=E0+KlgC
Then the relation of current potential of the low standard liquid concentration with surveying is：EL=E0+KlgCL
Then the relation of current potential of the high standard liquid concentration with surveying is：EH=E0+KlgCH
Then treat that test sample concentration and the relation of the current potential of survey are：Es=E0+KlgCs
By EL=E0+KlgCLAnd EH=E0+KlgCHIt can obtain
K=(EH-EL)/(lgCH-lgCL)
Wherein:
ELFor blank water, (concentration is C with standard liquid one1) while the current potential that measures of added-time；
EHFor standard liquid two, (concentration is C2) and the current potential that the added-time measures simultaneously of standard liquid one；
CLFor blank water and the mixed concentration of standard liquid one, we use standard addition method, are added with bull pump
Sample, pump line is identical, so CLIt is approximately C1/2；
Similarly CHIt is approximately (C1+C2)/2, EsTo treat that (concentration is C to test samplex) and the current potential that the added-time measures simultaneously of standard liquid one；
CsTo treat test sample and the mixed concentration of standard liquid one, we use standard addition method, are added with bull pump
Sample, pump line is identical, so CsIt is approximately (C1+Cx)/2；
Final try to achieve uses the calculation formula of standard addition method water sample concentration as follows：
The utility model is based on ammonia gas-sensing electrode method, is realized by the way of standard addition method to the online of Water quality ammonia nitrogen
Monitoring.Standard addition method can greatly lowering apparatus detection limit, while being set by carrying out constant temperature structure to ammonia gas-sensing electrode
Meter, can greatly reduce influence of the external environment to electrode signal.
The structure of the utility model Water quality ammonia nitrogen on-Line Monitor Device is as shown in figure 1, wherein five conjuncted valve groups 11 are included in advance
Stay valve 1, the valve 2 of standard liquid one, the valve 3 of cleaning fluid one, the valve 4 of blank water one, the valve 5 of air one, water sample valve 6, the valve 7 of standard liquid two, cleaning fluid two
Valve 8, the valve 9 of blank water two, the valve 10 of air two.Five conjuncted valve groups 11 are connected with dual-channel peristaltic pump 13, pass through alkaline reagent 12
Single channel peristaltic pump 14 be connected with three-way connection 16, dual-channel peristaltic pump 13 passes through three-way connection 15 and the phase of three-way connection 16
Connection, three-way connection 16 is connected by sample introduction pipeline 17 with reaction tank 20, and reaction tank 20 is also associated with drain line 23.Reaction
The bottom in pond 20 is mounted with stirring motor 22, and stirrer 21 is arranged on the bottom of reaction tank 20, and thermostat module 19 is arranged on reaction
The top in pond 20, and ammonia gas-sensing electrode 18 are inserted in reaction tank 20 by thermostat module 19.
The embodiment of the standard addition method is：Pass through two peristaltic pumps 13,14 and two five conjuncted valve groups 11
Mode carry out the sample introduction of the components such as reagent, standard liquid and water sample, while passing through step motor control completely in whole sample introduction process
The rotation of peristaltic pump is quantified.Measurement is demarcated to instrument every time, determines flow first to carry out mark one+blank water
Measurement, is then measured to one+water sample of mark, and finally mark one+mark two is measured again, by the current potential of mark one and mark two and
Corresponding concentration can draw corresponding curve, and the concentration of water sample can be calculated according to the current potential of curve negotiating water sample.
The maximum advantage of this method is that the measurement of rower one and mark two is entered in the measurement every time to water sample, can so ensure
The current potential of electrode and the logarithm of ammonia nitrogen concentration are linear, greatly reducing due to factors such as error in dipping, drift electrodes
Influence to measurement result；The mark one of fixed concentration is added when measuring water sample simultaneously, can be caused when water sample concentration is very low,
Ammonia gas-sensing electrode still has enough current potentials corresponding, and then enables instrument to measure the water sample that ammonia nitrogen concentration is less than 0.1mg/L,
And with higher accuracy.
The utility model is also carried out in addition to the standard addition method of uniqueness is employed in measuring method to ammonia gas-sensing electrode
The design of constant temperature, it is possible to decrease the drift effect of temperature and electrode signal, to improve the stability of electrode signal, and then causes measurement
As a result it is more accurate.
By the way of standard addition method+electrode method measurement ammonia nitrogen, compared to photometry solve water body color, turbidity and
Influence of the particulate matter to measurement, while so that measurement result is more steady demarcated standard addition method and every time by way of
It is fixed reliable, while the detection limit of instrument also greatly reduces.
It is settable that stepper motor is accurately controlled by pulse in optional embodiment of the present utility model, pass through stepping
Motor drives binary channels and the single channel peristaltic pump to add the accurate sample introductions of the components such as reagent, standard liquid, water sample, and then guarantee standard
Enter method in the consistent of each sampling volume.Ammonia gas-sensing electrode uses the design of thermostat module, it is ensured that the temperature change of electrode does not surpass
Cross ± 0.1 DEG C.Reading for electrode signal data is calculated by the way of Kalman filtering, it can be ensured that software algorithm is not
By external interference, and then improve the correctness of algorithm.
Embodiment：Water body ammonia nitrogen concentration is measured based on standard addition method
According to design of the present utility model, standard addition method is used to carry out ammonia nitrogen concentration for 0.5mg/L water sample multiple
Test, specific detailed measurements flow and step are as shown in table 1 below：
The measurement procedure of table 1 and step
Its concentration answered of getting the bid a pair is 1.4mg/L；Two corresponding standard liquid concentration are marked for 4.0mg/L；The number of measurement result
According to as shown in table 2 below：
The measurement result of table 2
It can be drawn by the data among above table, by measuring 0.5mg/L ammonia nitrogen water sample using standard addition method,
Its degree of accuracy can reach within ± 5.0%, and precision is 1.83%.
The decision method ammonia nitrogen on-Line Monitor Device determination of nitrite in water provided using the utility model, with following excellent
Point：
1), measurement is not influenceed by water body color, turbidity and particulate matter；
2), compared to traditional electrode method instrument, 0.01mg/L can reach using the instrument detection limit after standard addition method；
3), single branch electrode can realize the test that ammonia nitrogen concentration is all water samples of 0~1000mg/L；
4), operation cost is only the 1/5 of photometry；
5), reagent is nontoxic, will not cause secondary pollution to environment.
The utility model is described in detail above, it is described above, only the preferred embodiment of the utility model and
, it is when the utility model practical range can not be limited, i.e., all to make equivalent changes and modifications according to the application scope, it all should still belong to this
In utility model covering scope.
Claims (7)
1. a kind of Water quality ammonia nitrogen on-Line Monitor Device, including sample presentation portion and the reacting part that is connected with sample presentation portion, it is characterised in that
The sample presentation portion includes valve group, at least one peristaltic pump and connecting valve group for being connected to valve group and reacting part and at least
The pipeline of one peristaltic pump, the reacting part includes reaction tank, connects the drain line of reaction tank, and reaction tank bottom, which is mounted with, to be stirred
Motor is mixed, stirrer is arranged on reaction tank bottom, and thermostat module is arranged on above reaction tank, and ammonia gas-sensing electrode is passed through perseverance
Warm module is inserted in reaction tank.
2. Water quality ammonia nitrogen on-Line Monitor Device according to claim 1, it is characterised in that the valve group is five conjuncted valves
Group.
3. Water quality ammonia nitrogen on-Line Monitor Device according to claim 2, it is characterised in that the five conjuncted valve group includes pre-
Stay valve, the valve of standard liquid one, the valve of cleaning fluid one, the valve of blank water one, the valve of air one, water sample valve, the valve of standard liquid two, the valve of cleaning fluid two, blank
The valve of water two, the valve of air two.
4. Water quality ammonia nitrogen on-Line Monitor Device according to claim 1, it is characterised in that the peristaltic pump includes being set
Dual-channel peristaltic pump between valve group and reaction tank.
5. Water quality ammonia nitrogen on-Line Monitor Device according to claim 4, it is characterised in that the dual-channel peristaltic pump with it is anti-
Three-way connection is provided between Ying Chi.
6. Water quality ammonia nitrogen on-Line Monitor Device according to claim 1, it is characterised in that also including pumping alkali to reaction tank
The single channel peristaltic pump of property reagent.
7. Water quality ammonia nitrogen on-Line Monitor Device according to claim 6, it is characterised in that the single channel peristaltic pump with it is anti-
Three-way connection is provided between Ying Chi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720296110.6U CN206618713U (en) | 2017-03-24 | 2017-03-24 | A kind of Water quality ammonia nitrogen on-Line Monitor Device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720296110.6U CN206618713U (en) | 2017-03-24 | 2017-03-24 | A kind of Water quality ammonia nitrogen on-Line Monitor Device |
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| CN206618713U true CN206618713U (en) | 2017-11-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297917A (en) * | 2018-11-27 | 2019-02-01 | 浙江微兰环境科技有限公司 | It is a kind of using double peristaltic pump systems as the micro-fluidic NH 3 flow path system of core |
| CN110108769A (en) * | 2019-05-31 | 2019-08-09 | 中兴仪器（深圳）有限公司 | A kind of detection device of on-line measurement ammonia nitrogen |
| CN110927235A (en) * | 2019-12-11 | 2020-03-27 | 中兴仪器（深圳）有限公司 | On-line analyzer and measuring method for trace iodine |
-
2017
- 2017-03-24 CN CN201720296110.6U patent/CN206618713U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109297917A (en) * | 2018-11-27 | 2019-02-01 | 浙江微兰环境科技有限公司 | It is a kind of using double peristaltic pump systems as the micro-fluidic NH 3 flow path system of core |
| CN110108769A (en) * | 2019-05-31 | 2019-08-09 | 中兴仪器（深圳）有限公司 | A kind of detection device of on-line measurement ammonia nitrogen |
| CN110927235A (en) * | 2019-12-11 | 2020-03-27 | 中兴仪器（深圳）有限公司 | On-line analyzer and measuring method for trace iodine |
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| GR01 | Patent grant | ||
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Address after: 518000 Room 301, building 2, runheng Industrial Zone, No.1, liuxiansan Road, 67 District, Xingdong community, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Bixing IOT Technology (Shenzhen) Co.,Ltd. Address before: 2-3 / F, building 2, runheng Dingfeng Industrial Park, Liuxian 2nd Road, Xin'an street, Bao'an District, Shenzhen, Guangdong 518000 Patentee before: ZTE INSTRUMENTS (SHENZHEN) Co.,Ltd. |
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