CN206546353U - A kind of COD titration outfit - Google Patents
A kind of COD titration outfit Download PDFInfo
- Publication number
- CN206546353U CN206546353U CN201720150209.5U CN201720150209U CN206546353U CN 206546353 U CN206546353 U CN 206546353U CN 201720150209 U CN201720150209 U CN 201720150209U CN 206546353 U CN206546353 U CN 206546353U
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- CN
- China
- Prior art keywords
- titration
- peristaltic pump
- stirring apparatus
- magnetic stirring
- button
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Abstract
The utility model is related to a kind of COD automatic titration device, is made up of magnetic stirring apparatus, titration outfit and peristaltic pump, and titration outfit and peristaltic pump are connected by flexible pipe, and peristaltic pump, which connects flexible pipe, injection port one；The peristaltic pump is provided with control shelves；Glass dropper upper end connects the injection port two of flexible pipe by connector, and glass dropper lower end is injected in the digestion tube of titration outfit, and digestion tube is fixed on the arc-shaped slot of magnetic stirring apparatus base；There are motor and magnet in magnetic stirring apparatus, magnetic stirring apparatus has rotational speed regulation button.The utility model glass dropper reducing agent needed for contain reaction, peristaltic pump is quantitatively adding reducing agent by squeezing tube.The magnetic field produced by magnetic stirring apparatus drives stirrer to be well mixed reaction solution.The utility model can realize automatic dripping reducing agent and automatic stirring, reduce titration by hand and solution shifts the human error and systematic error caused, improve precision of analysis, it is adaptable to laboratory conventional analysis oxygen demand.
Description
Technical field
The utility model is related to a kind of COD titration outfit in monitoring water environment field, can especially reduce titration
During manual operations.
Background technology
COD is one of index of evaluating water quality pollution the most frequently used at present, is widely used in environmental protection
Various trade effluents, the monitoring of sanitary sewage and surface water, research and handle.Therefore the COD of modernization is worked out
Measurement and analysis instrument is very necessary.
The assay method of current COD has dichromate titration, AAS and UV absorption photometer method.State
Interior most water chemical oxygen demand on-line computing model uses AAS, and sample passes through high pressure-temperature rapid-digestion
Afterwards, the absorbance of the trivalent chromic ion produced using the potassium bichromate being reduced in 600nm visible ray colorimetric estimation sample, then
It is converted into the concentration of COD；UV absorption photometer method is using low pressure mercury lamp as ultraviolet light source, and ultraviolet passes through light splitting
Device isolates 254nm ultraviolet and 546nm visible ray, and two-beam is examined by detecting sample, then by photodiode respectively
Luminous intensity is measured, finally by microprocessor conversion testing result；Dichromate titration is cleared up by potassium bichromate, sub- with consumption sulfuric acid
The amount of iron ammonium obtains the mass concentration of oxygen demand, obtains the chemical oxygen demand value of sample, the method is national standard method.
AAS and UV absorption photometer method are difficult to determine low concentration sample, it is impossible to exclude colourity and turbidity is brought
Systematic error, detection limit is also higher.Although national standard method dichromate titration can overcome the above difficult, need to clear up sample by hand
Sample is easily lost in product, by hand titration, solution transfer process, human error and systematic error is easily brought.
CN2735341 discloses a kind of COD online automatic monitor, including sampling apparatus, liquid-adding device, disappears
Device and titration detection means are solved, sampling apparatus is made up of sampling pump M2, raw water sampling valve Y20, raw water sampling bottle C0, liquid feeding dress
Put by aspiration pump P, liquid holding bottle C1, C2, C3, C4, volumetric bottle D0, D1, D2, D3, D4, gas-distribution pipe G, breather pipe, liquid-feeding tube, liquid relief
Pipe, magnetic valve Y1~Y16 and mixer for liquid H compositions, digestion instrument carry enclosed type ring by magnetic valve Y17, Y18, Y19 and outside
Tubulose digestion device S, temperature controller T and water condenser the L composition of shape heating collar, titration detection means is by band stepper motor M0
Syringe pump Z, titrating solution switching valve Y21, titrating solution storing containers C5, agitator M1, titration bottle C6 and installed in titration bottle C6
Interior potential electrode J0 compositions.
The content of the invention
The purpose of this utility model is intended to overcome present in above-mentioned COD titration process manual operations excessive etc.
Deficiency can reduce manual operations there is provided one kind, realize the titration outfit of laboratory chemical oxygen demand automatic ration titration.
The utility model purpose is achieved in that：COD automatic titration device, is filled by magnetic stirring apparatus, titration
Put and wriggling pump portion composition, titration outfit and peristaltic pump are connected by flexible pipe, and peristaltic pump, which connects flexible pipe, injection port one；It is described compacted
Dynamic pump is provided with control shelves；
There is connector glass dropper upper end, and glass dropper connects the injection port two of flexible pipe, glass dropper lower end by connector
In the digestion tube for injecting titration outfit, digestion tube is fixed on the arc-shaped slot of magnetic stirring apparatus base；
There are motor and magnet in the magnetic stirring apparatus, magnetic stirring apparatus has rotational speed regulation button.
When using the utility model, digestion tube to be titrated is put into arc-shaped slot, magnetic stirring apparatus power supply is opened, regulation turns
Speed, the reducing agent volume before record titration.Peristaltic pump is opened, button is pressed and carries out in automatic dripping reducing agent, observation digestion tube
Solution colour changes, after solution becomes blue-green by yellow, use instead it is micro be added dropwise until terminal, record titration pattern used and
Use time, is converted into the amount of consumption reducing agent, further calculates the concentration of COD.Whole titration process, without hand
Work adds reagent, is also shifted without solution, reduces human error and systematic error.
Brief description of the drawings
Fig. 1 is the utility model COD titration outfit structure chart；
Fig. 2 is the utility model peristaltic pump structure top view.
Embodiment
The utility model is described in detail with reference to the accompanying drawings.
Reference picture 1, the utility model is made up of magnetic stirring apparatus, titration outfit and wriggling pump portion, titration outfit and compacted
Dynamic pump 2 is connected by flexible pipe 3, and described flexible pipe is silicone rubber tube, bore 0.2cm.Peristaltic pump 2, which connects flexible pipe, injection port 1；
The peristaltic pump 2 has vacuum sealing effect, does not contact solution, peristaltic pump is provided with control shelves.
Reference picture 1,2, the control shelves of peristaltic pump have " 0.05 ", " 0.5 " and " automatic " three shelves, on display interface
" 0.05 ", " 0.5 " and " automatic " three button controls." 0.05 " button is micro dropwise addition button, and titration flow is
0.05mL/s, it is adaptable to close to the titration of terminal；" 0.5 " button is fast drop button, and titration flow is 0.5mL/s,
Suitable for the titration of reducing agent consumption greatly；Described the Auto button is automatic dripping button, and titration flow is 0.15mL/s, is fitted
For typically titrating.
Peristaltic pump is the longerpump type peristaltic pumps of the bold and generous international corporation Baoding branch company production of Britain, the application
" 0.05 ", " 0.5 " and " automatic " three shelves are additionally arranged in the usual way the need for artificial the utility model.
There is connector 5 upper end of glass dropper 6, and glass dropper connects the injection port 24 of flexible pipe 3, glass dropper by connector
Lower end is injected in the digestion tube 7 of titration outfit.The glass dropper is the acid buret of valveless, with graduation mark.Glass
The high 55cm of dropper, pipe upper-end inner diameter 1.1cm, external diameter 1.2cm, pipe bottom diameter 0.1cm, external diameter 0.3cm.
Digestion tube 9 equipped with digestion solution is fixed on the circular arc-shaped slot 8 of magnetic stirring apparatus, and digestion tube can disappear in batches
Sample is solved, is titrated without digestion solution is transferred in conical flask.The digestion tube is glass tube, high 21cm, in digestion tube lower end
Footpath 3.7cm, external diameter 4.0cm.The arc-shaped slot is laminated structure, and arc-shaped slot internal diameter 4.0cm can pass through neck observation and clear up
Solution colour changes in pipe.
There are motor and magnet in the magnetic stirring apparatus 9, magnetic stirring apparatus is separately provided power switch, can external 220V
AC power, magnetic stirring apparatus is continually changing base polarity, promotes magnetic stirrer to rotate, and magnetic stirrer is driven in digestion tube
The rotation of solution.Magnetic stirring apparatus has rotational speed regulation button 10, opens the power switch of magnetic stirring apparatus 9, is adjusted by adjusting rotating speed
Section button 10 is well mixed solution in digestion tube.
Magnetic stirring apparatus base is circle, and diameter 12cm is metal material base.
When starting titration experiments with the utility model, digestion tube to be titrated is put into arc-shaped slot after the completion of clearing up,
Magnetic stirring apparatus power supply is opened, rotating speed is adjusted, it is ensured that digestion solution liquid level is well mixed, the reducing agent volume before record titration.Beat
Peristaltic pump is opened, the Auto button is pressed and carries out solution colour change in automatic dripping reducing agent, observation digestion tube, when solution is by Huang
Discoloration uses micro dropwise addition button instead into after blue-green, until terminal, record titration pattern used and use time, are converted into and disappear
The amount of reducing agent is consumed, the concentration of COD is further calculated.After the completion of all samples analysis, flexible pipe injection port is placed in clearly
In water, cleaning disconnects peristaltic pump in two minutes again.
Whole titration process, without reagent is manually added, also shifts without solution, reduces human error and systematic error.
Claims (9)
1. COD automatic titration device, is made up of magnetic stirring apparatus, titration outfit and peristaltic pump, it is characterised in that：Drop
Determine device and peristaltic pump is connected by flexible pipe, peristaltic pump, which connects flexible pipe, injection port one；The peristaltic pump is provided with control shelves；
There is connector glass dropper upper end, and glass dropper connects the injection port two of flexible pipe by connector, and glass dropper lower end is injected
In the digestion tube of titration outfit, digestion tube is fixed on the arc-shaped slot of magnetic stirring apparatus base；
There are motor and magnet in the magnetic stirring apparatus, magnetic stirring apparatus has rotational speed regulation button.
2. COD automatic titration device according to claim 1, it is characterised in that：Peristaltic pump does not contact solution,
The control shelves of peristaltic pump have " 0.05 ", " 0.5 " and " automatic " three shelves, " 0.05 ", " 0.5 " and " automatic " on display interface
Three button controls.
3. COD automatic titration device according to claim 1 or 2, it is characterised in that：" 0.05 " button
For micro dropwise addition button, titration flow is 0.05mL/s；" 0.5 " button is fast drop button, and titration flow is
0.5mL/s；Described the Auto button is automatic dripping button, and titration flow is 0.15mL/s.
4. COD automatic titration device according to claim 1, it is characterised in that：The digestion tube is glass
Pipe, high 21cm, digestion tube bottom diameter 3.7cm, external diameter 4.0cm.
5. COD automatic titration device according to claim 1, it is characterised in that：The glass dropper is valveless
The acid buret of door, with graduation mark.
6. COD automatic titration device according to claim 1 or 5, it is characterised in that：The glass dropper is high
55cm, pipe upper-end inner diameter 1.1cm, external diameter 1.2cm, pipe bottom diameter 0.1cm, external diameter 0.3cm.
7. COD automatic titration device according to claim 1, it is characterised in that：Described flexible pipe is silicon rubber
Pipe, bore 0.2cm.
8. COD automatic titration device according to claim 1, it is characterised in that：The arc-shaped slot is sheet
Structure, arc-shaped slot internal diameter 4.0cm.
9. COD automatic titration device according to claim 1, it is characterised in that：Magnetic stirring apparatus base is circle
Shape, diameter 12cm is metal material base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150209.5U CN206546353U (en) | 2017-02-20 | 2017-02-20 | A kind of COD titration outfit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720150209.5U CN206546353U (en) | 2017-02-20 | 2017-02-20 | A kind of COD titration outfit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206546353U true CN206546353U (en) | 2017-10-10 |
Family
ID=59994056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720150209.5U Expired - Fee Related CN206546353U (en) | 2017-02-20 | 2017-02-20 | A kind of COD titration outfit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206546353U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786946A (en) * | 2018-05-03 | 2018-11-13 | 昆明仁旺科技有限公司 | A kind of novel intelligent liquid relief machine and system |
| CN110487675A (en) * | 2019-08-29 | 2019-11-22 | 新疆中泰纺织集团有限公司 | The method of viscose ripening degree detection device and detection viscose ripening degree |
| CN111693397A (en) * | 2020-05-25 | 2020-09-22 | 广东省测试分析研究所（中国广州分析测试中心） | Novel automatic constant volume device and automatic constant volume method |
| CN112147272A (en) * | 2020-11-02 | 2020-12-29 | 北京市理化分析测试中心 | Method for detecting activated sludge COD (chemical oxygen demand) by using high-precision photothermal potential analyzer |
| CN112611833A (en) * | 2020-12-28 | 2021-04-06 | 浙江大学昆山创新中心 | Automatic titration device for chemical oxygen demand |
-
2017
- 2017-02-20 CN CN201720150209.5U patent/CN206546353U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108786946A (en) * | 2018-05-03 | 2018-11-13 | 昆明仁旺科技有限公司 | A kind of novel intelligent liquid relief machine and system |
| CN110487675A (en) * | 2019-08-29 | 2019-11-22 | 新疆中泰纺织集团有限公司 | The method of viscose ripening degree detection device and detection viscose ripening degree |
| CN111693397A (en) * | 2020-05-25 | 2020-09-22 | 广东省测试分析研究所（中国广州分析测试中心） | Novel automatic constant volume device and automatic constant volume method |
| CN112147272A (en) * | 2020-11-02 | 2020-12-29 | 北京市理化分析测试中心 | Method for detecting activated sludge COD (chemical oxygen demand) by using high-precision photothermal potential analyzer |
| CN112611833A (en) * | 2020-12-28 | 2021-04-06 | 浙江大学昆山创新中心 | Automatic titration device for chemical oxygen demand |
| CN112611833B (en) * | 2020-12-28 | 2022-08-23 | 浙江大学昆山创新中心 | Automatic titration device for chemical oxygen demand |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171010 Termination date: 20190220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |