CN203405441U - Instrument for detecting COD (chemical oxygen demand) of high-chlorine wastewater on line by basic potassium permanganate method - Google Patents
Instrument for detecting COD (chemical oxygen demand) of high-chlorine wastewater on line by basic potassium permanganate method Download PDFInfo
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- CN203405441U CN203405441U CN201320168055.4U CN201320168055U CN203405441U CN 203405441 U CN203405441 U CN 203405441U CN 201320168055 U CN201320168055 U CN 201320168055U CN 203405441 U CN203405441 U CN 203405441U
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- VZJVWSHVAAUDKD-UHFFFAOYSA-N Potassium permanganate Chemical compound [K+].[O-][Mn](=O)(=O)=O VZJVWSHVAAUDKD-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 239000002351 wastewater Substances 0.000 title claims abstract description 13
- 239000000126 substance Substances 0.000 title abstract description 7
- 239000001301 oxygen Substances 0.000 title abstract description 6
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 title abstract description 6
- 229910052760 oxygen Inorganic materials 0.000 title abstract description 6
- 239000000460 chlorine Substances 0.000 title abstract 2
- 229910052801 chlorine Inorganic materials 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000004448 titration Methods 0.000 claims abstract description 15
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 7
- 230000029087 digestion Effects 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000005337 ground glass Substances 0.000 claims description 4
- 238000002955 isolation Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 241000276438 Gadus morhua Species 0.000 claims 2
- 235000019516 cod Nutrition 0.000 claims 2
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 7
- 238000001514 detection method Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 239000002253 acid Substances 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 230000002452 interceptive Effects 0.000 abstract description 2
- 230000000873 masking Effects 0.000 abstract 2
- 239000007800 oxidant agent Substances 0.000 abstract 1
- 230000001590 oxidative Effects 0.000 abstract 1
- 239000003638 reducing agent Substances 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 6
- KMUONIBRACKNSN-UHFFFAOYSA-N Potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 6
- NLKNQRATVPKPDG-UHFFFAOYSA-M Potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229940069002 Potassium Dichromate Drugs 0.000 description 3
- AKHNMLFCWUSKQB-UHFFFAOYSA-L Sodium thiosulphate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002848 electrochemical method Methods 0.000 description 2
- 235000009808 lpulo Nutrition 0.000 description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- 241001584775 Tunga penetrans Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000001413 cellular Effects 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl radical Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 230000002572 peristaltic Effects 0.000 description 1
- NPDODHDPVPPRDJ-UHFFFAOYSA-N permanganate Chemical compound [O-][Mn](=O)(=O)=O NPDODHDPVPPRDJ-UHFFFAOYSA-N 0.000 description 1
- 230000002829 reduced Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
Abstract
The utility model discloses an instrument for detecting COD (chemical oxygen demand) of high-chlorine wastewater on line by a basic potassium permanganate method. The instrument comprises a metering unit (1), a reactor unit (2), a detection unit (3) and an industrial control and data processing and transmitting unit (4). According to the instrument, a sample and a standard reagent, namely an oxidant, are accurately metered through a metering cup, quantitatively added into a decomposing cup of the reactor unit, decomposed for a certain time at a constant temperature, cooled and transferred into a titration cup of the reactor unit, a masking agent is added for masking interfering substances in the sample, and then a reducing agent and acid are added; the whole detection process of data acquiring, analyzing, processing, storing and transmitting is automatically controlled through an industrial control unit PLC (programmable logic controller); the COD value of the sample is calculated, so that COD in a water body can be accurately detected.
Description
Technical field
The utility model belongs to environment online measuring technique field, particularly relates to the on-line detector of a kind of high-chloride wastewater COD.
Technical background
Water-quality COD on-line detector is as one of the important monitoring instrument in environmental monitoring field, its detection technique is comparative maturity also, and main know-why has following several: potassium dichromate resolution method, ultraviolet spectroscopy-UV meter, hydroxyl radical free radical (OH) oxidation-electrochemical measurement method, ozone oxidation-electrochemical measurement method and bioanalysis etc.Wherein, only having potassium dichromate method is state specified standards method, and the data that other detection method obtains all need to be converted into CODcr.But the method is all very limited to the antijamming capability of chlorion, is not suitable for the detection of the waste water COD that chloride ion content is very high.
What approach the most with the utility model main technical principle is that standard No. is the national standard of HJ/T 132-2003, and name is called " the mensuration potassium iodide alkaline permanganate method of chemical oxygen demand of high-chloride wastewater ".This standard method is: under alkali condition, with the reducing substances in potassium permanganate oxidation sample, with potassium iodide, reduce excessive potassium permanganate, the iodine generating with sodium thiosulfate titration under acid condition again, according to the potassium permanganate consumption of water sample consumption, calculate the mass concentration of corresponding oxygen, then be converted into CODcr.
The subject matter of the method is, can only be by analyst in laboratory to sample manual analyzing, the real-time online of not realizing such water-quality COD detects automatically.
Utility model content
The defect existing in order to overcome prior art, the purpose of this utility model is to adopt the principles of chemistry of " basic potassium permanganate method ", develops a kind of on-line detector device of the novel water-quality COD that is applicable to high-chloride wastewater.
A kind of high-chloride wastewater COD on-line detector that adopts basic potassium permanganate method of the utility model, be divided into metering units (1), reactor unit (2), detecting unit (3), industry control and data processing and transmission unit (4), it is characterized in that: metering units (1) comprises that metering cup (101) is provided with the first inlet (102), the external fan blower of metering units (1) top design blow vent (104), reactor unit (2) is cleared up cup for water bath with thermostatic control, by interior cup (201) and outer cup (202) two parts, interior cup (201) and outer cup (202) isolation, and be with ground glass stopper, outer cup (202) is provided with water inlet (205) and water delivering orifice (206), reactor unit (2) is connected with four-way valve (207), digestion solution is cooling, react complete, by four-way valve (207), drain into detecting unit (3), detecting unit (3) is titration cup, be provided with the 3rd inlet (301), vs mouth (302), and blow and stir by bottom four-way valve (304), in cup, the electric potential signal of solution reaches industry control unit (4) by the two platinum electrodes (303) that insert in cup, the sample of having analyzed drains into waste liquid barrel through four-way valve.The first inlet (102) is connected with four-way valve, and the grournd glass of interior cup (201) is provided with the second inlet (203) and a spiral exhausr port (204) beyond the Great Wall.
Metering units of the present utility model (1) is by the metering cup of national China Metrology Accreditation, can accurate-metering sample and the consumption of standard reagent, metering cup (101) is provided with the first inlet (102), and expand two inlets by four-way valve (105), the external fan blower of metering units (1) top design blow vent (104), is convenient to liquid and drains into better reactor unit (2).Reactor unit (2) is cleared up cup for water bath with thermostatic control, by interior cup (201) and outer cup (202) two parts.Interior cup (201) and outer cup (202) isolation, and be with ground glass stopper.The grournd glass of interior cup (201) designs the second inlet (203) and a spiral exhausr port (204) beyond the Great Wall.Outer cup (202) is provided with water inlet (205) and water delivering orifice (206), and reactor unit (2) is connected with four-way valve (207), and digestion solution is cooling, react complete, by four-way valve (207), drains into detecting unit (3).Detecting unit (3) is titration cup, is provided with the 3rd inlet (301), vs mouth (302), and blow and stir by bottom four-way valve (304).In cup, the electric potential signal of solution reaches industry control unit (4) by the two platinum electrodes (303) that insert in cup, and the sample of having analyzed drains into waste liquid barrel through four-way valve (304).
High-chloride wastewater COD online automatic detection instrument of the present utility model, has following characteristics, and first is the stable reaction system of clearing up; Second is the interference of getting rid of various inorganic salts; The 3rd is endpoint determination system accurately; The 4th is the science conversion that realizes permanganimetric method and potassium dichromate method mensuration numerical value.Details are as follows for concrete feature.
1, be provided with reactor unit-water bath with thermostatic control and clear up cup.Clear up cup and be divided into outer cup and interior cup, interior cup provides reacting environment, and outer cup provides reaction environment.Without temperature sensor, just can realize thermostatic control, simultaneously after reaction finishes, start cooling water circulation and realize quick cooling digestion solution clearing up.Improve detection efficiency, also save production cost.
2, be provided with new agent prescription, to adapt to different water quality.In testing process, add sulfuric acid acidation, the water quality very high to a lot of salinities is all not suitable for, and most of sulfate is all hard to tolerate or sl. sol., thereby can stop up pipe valve, contaminated electrode.Villaumite is all water-soluble substantially, but the corrosivity that hydrochloric acid volatilization brings is easy to damage instrument components and parts.High-chloride wastewater COD on-line detector of the present utility model adopts the acid mixture of sulfuric acid and hydrochloric acid, when guaranteeing acidity, reduces respectively the concentration of sulfuric acid and hydrochloric acid, solves the problem that instrument stops up and corrodes.
3, the utility model belongs to oxidimetry, and industry control and data processing are judged terminal with the electrode potential hop that transmission unit (4) reacts according to two platinum electrodes, automatically stop titration.Be quick on the draw, control precisely.Circuit control system of the present utility model is stable, reliable, and antijamming capability is strong.
A kind of high-chloride wastewater COD on-line detector that adopts basic potassium permanganate method of the present utility model, sample and standard reagent oxygenant, by jigger accurate-metering, quantitatively join reactor unit and clear up in cup, under constant temperature, clear up certain hour, after cooling, go in reactor unit titration cup, add screening agent to shelter interfering material in sample, then add reductive agent and acid, reduce excessive oxygenant, finally use vs titration, according to the potential jump of solution, judge titration end-point.By industry control unit PLC, realize whole testing process robotization is controlled, data acquisition, analysis, processing, storage and transmission.Calculate the COD value of sample, can detect exactly the chemical oxygen demand (COD) in water body.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is know-why process flow diagram of the present utility model;
Fig. 3 is specimen reaction cellular construction schematic diagram of the present utility model;
Fig. 4 is industrial control system flow chart of data processing figure.
Embodiment
The utility model is pressed the structure shown in figure and is implemented.
Sample through clearing up, uses sodium thiosulfate titration, adopts electrode potential titrimetry, according to reaction system potential break, judge titration end-point, data, through gathering, are converted into the information that PLC can identify and process, calculate the COD value of sample, can detect exactly the chemical oxygen demand (COD) in water body.
Metering units of the present utility model (1) is for by the metering cup of national China Metrology Accreditation, can accurate-metering sample and the consumption of standard reagent, as shown in Figure 3.Metering cup (101) is the active volume of metering cup, be provided with the first inlet (102), liquid enters metering cup (101) through peristaltic pump through the first inlet (102), and expand two inlets by four-way valve (105), each feed tube is arranged to back suction simultaneously, avoid liquid cross pollution.The reagent having more drains into waste liquid barrel through overflow vent (103).The external fan blower of metering units (1) top design blow vent (104), is convenient to liquid and drains into better reactor unit (2).
Sample and oxygenant drain into reactor unit (2) and carry out heating and decompose after metering units (1) accurate measurement.Reactor unit of the present utility model (2) is cleared up cup for the water bath with thermostatic control of designed, designed, and as shown in Figure 3, this cup is divided into interior cup (201) and outer cup (202) two parts.Interior cup (201) is for clearing up reacting environment, and smooth inner wall design, with outer cup (202) isolation, and is with ground glass stopper.The grournd glass of interior cup (201) designs the second inlet (203) beyond the Great Wall, and it is direct, accurate, pollution-free that reagent adds, and a spiral exhausr port (204).Outer cup (202) is provided with water inlet (205) and water delivering orifice (206), clears up and reacts while carrying out, and outer cup (202) provides water bath with thermostatic control condition; Clear up reaction and finish, outer cup (202) provides recirculated water, rapid cooling digestion solution.Reactor unit (2) is connected with four-way valve (207), while clearing up reaction, can be blown and be stirred by external blower pump.
Digestion solution is cooling, react complete, by four-way valve (207), drains into detecting unit (3).Detecting unit of the present utility model (3) is titration cup, as shown in Figure 3, the 3rd inlet (301) of this titration cup design, a vs mouth (302), and blow and stir by bottom four-way valve (304).In cup, the electric potential signal of solution reaches industry control unit (4) by the two platinum electrodes (303) that insert in cup, when current potential generation hop, industry control unit (4) PLC is according to the signal determining terminal that collects and correspondingly stop titration, according to reagent consumption result of calculation, store and transmit.The sample of having analyzed drains into waste liquid barrel through four-way valve (304), handles together.
Claims (2)
1. a high-chloride wastewater COD on-line detector that adopts basic potassium permanganate method, be divided into metering units (1), reactor unit (2), detecting unit (3), industry control and data processing and transmission unit (4), it is characterized in that: metering units (1) comprises that metering cup (101) is provided with the first inlet (102), the external fan blower of metering units (1) top design blow vent (104), reactor unit (2) is cleared up cup for water bath with thermostatic control, by interior cup (201) and outer cup (202) two parts, interior cup (201) and outer cup (202) isolation, and be with ground glass stopper, outer cup (202) is provided with water inlet (205) and water delivering orifice (206), reactor unit (2) is connected with four-way valve (207), digestion solution is cooling, react complete, by four-way valve (207), drain into detecting unit (3), detecting unit (3) is titration cup, be provided with the 3rd inlet (301), vs mouth (302), and blow and stir by bottom four-way valve (304), in cup, the electric potential signal of solution reaches industry control unit (4) by the two platinum electrodes (303) that insert in cup, the sample of having analyzed drains into waste liquid barrel through four-way valve.
2. a kind of high-chloride wastewater COD on-line detector that adopts basic potassium permanganate method as claimed in claim 1, it is characterized in that: the first inlet (102) is connected with four-way valve, the grournd glass of interior cup (201) is provided with the second inlet (203) and a spiral exhausr port (204) beyond the Great Wall.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320168055.4U CN203405441U (en) | 2013-04-07 | 2013-04-07 | Instrument for detecting COD (chemical oxygen demand) of high-chlorine wastewater on line by basic potassium permanganate method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320168055.4U CN203405441U (en) | 2013-04-07 | 2013-04-07 | Instrument for detecting COD (chemical oxygen demand) of high-chlorine wastewater on line by basic potassium permanganate method |
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| CN203405441U true CN203405441U (en) | 2014-01-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777030A (en) * | 2014-01-26 | 2014-05-07 | 石家庄德润环保科技有限公司 | Automatic laboratory chemical oxygen demand analysis device |
| CN104515769A (en) * | 2014-11-27 | 2015-04-15 | 宁波大地化工环保有限公司 | High chloride wastewater COD (chemical oxygen demand) rapid determination method |
| CN105403660A (en) * | 2015-12-16 | 2016-03-16 | 济南海能仪器股份有限公司 | Titration reaction apparatus |
| CN105445411A (en) * | 2015-12-16 | 2016-03-30 | 山东海能科学仪器有限公司 | Kjeldahl apparatus liquid inlet device |
| CN106525832A (en) * | 2016-10-27 | 2017-03-22 | 新疆大学 | Manganese-chromium two-stage oxidation method for determining COD in high chlorine-containing wastewater |
| CN109521077A (en) * | 2018-11-13 | 2019-03-26 | 国电南瑞科技股份有限公司 | A kind of two-wave interpretation formula online Analysis Apparatus of Permanganate Index titration end-point instruction device |
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2013
- 2013-04-07 CN CN201320168055.4U patent/CN203405441U/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103777030A (en) * | 2014-01-26 | 2014-05-07 | 石家庄德润环保科技有限公司 | Automatic laboratory chemical oxygen demand analysis device |
| CN103777030B (en) * | 2014-01-26 | 2015-05-27 | 石家庄德润环保科技有限公司 | Automatic laboratory chemical oxygen demand analysis device |
| CN104515769A (en) * | 2014-11-27 | 2015-04-15 | 宁波大地化工环保有限公司 | High chloride wastewater COD (chemical oxygen demand) rapid determination method |
| CN104515769B (en) * | 2014-11-27 | 2017-10-20 | 宁波大地化工环保有限公司 | A kind of quick measure high-chloride wastewater COD method |
| CN105403660A (en) * | 2015-12-16 | 2016-03-16 | 济南海能仪器股份有限公司 | Titration reaction apparatus |
| CN105445411A (en) * | 2015-12-16 | 2016-03-30 | 山东海能科学仪器有限公司 | Kjeldahl apparatus liquid inlet device |
| CN105445411B (en) * | 2015-12-16 | 2017-08-08 | 山东海能科学仪器有限公司 | Kjeldahl apparatus feeding device |
| CN106525832A (en) * | 2016-10-27 | 2017-03-22 | 新疆大学 | Manganese-chromium two-stage oxidation method for determining COD in high chlorine-containing wastewater |
| CN109521077A (en) * | 2018-11-13 | 2019-03-26 | 国电南瑞科技股份有限公司 | A kind of two-wave interpretation formula online Analysis Apparatus of Permanganate Index titration end-point instruction device |
| WO2020098361A1 (en) * | 2018-11-13 | 2020-05-22 | 国电南瑞科技股份有限公司 | Titration end point indicating device for permanganate index on-line analyzer of double platinum electrode type |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: JIANGXI ESUN TECHNOLOGY CO., LTD. Assignor: Jiangxi Yishan Environmental Protection Co.,Ltd. Contract record no.: 2015360000018 Denomination of utility model: A kind of high-chloride wastewater COD on-line detector that adopts basic potassium permanganate method Granted publication date: 20140122 License type: Exclusive License Record date: 20150227 |
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| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 330096 No. 688, hi tech Avenue, Jiangxi, Nanchang Patentee after: JIANGXI ESUN ENVIRONMENT PROTECTION CO., LTD. Address before: 330096 No. 688, hi tech Avenue, Jiangxi, Nanchang Patentee before: Jiangxi Yishan Environmental Protection Co.,Ltd. |