CN2185437Y - Automatic tester for chemical oxygen demand of sewage - Google Patents
Automatic tester for chemical oxygen demand of sewage Download PDFInfo
- Publication number
- CN2185437Y CN2185437Y CN 94226567 CN94226567U CN2185437Y CN 2185437 Y CN2185437 Y CN 2185437Y CN 94226567 CN94226567 CN 94226567 CN 94226567 U CN94226567 U CN 94226567U CN 2185437 Y CN2185437 Y CN 2185437Y
- Authority
- CN
- China
- Prior art keywords
- bottle
- liquid
- titration
- pipe
- volumetric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to an automatic tester for chemical oxygen demand of sewage, which comprises a microcomputer control processor, a sampling pump, a liquid adding device, a counteraction device and a titration device, wherein, the liquid adding device comprises a liquid containing bottle, a pipette and a liquid adding pipe, the counteraction device comprises a constant temperature electric furnace, a counteraction bottle and a condensing pipe, and the titration device comprises an injection pump, a titration bottle and a liquid containing bottle of titration liquid. The utility model is characterized in that the liquid adding device also comprises an air compressor, an air distribution pipe, a ventilating pipe, a liquid moving electromagnetic valve, a liquid adding electromagnetic valve, a quantitative bottle and a counteraction liquid adding device. The automatic tester for chemical oxygen demand of sewage realizes automatic detection, lightens manual workload and has accurate and reliable results. The utility model can be used for continuous and automatic on-line detection for water sources of sewage.
Description
The utility model relates to a kind of instrument that utilizes chemical method to detect water quality, and is particularly a kind of by micro-processor controlled sewage chemical oxygen demand automatic tester.
Chemical oxygen demand (COD) (english abbreviation COD, down together) is meant under certain condition various organic substances and strong oxidizer potassium dichromate (K in the water
2Cr
2O
7) make the oxygen amount that the time spent consumes, represent with the mg/l number of oxygen.It is the important indicator that the indication water body is subjected to the organism pollution level, is the important parameter in the Water Quality Evaluation.Standard GB 11914-89 strict regulations do method, the step that oxygenant detects water-quality COD content with potassium dichromate, be called for short the chromium method.At present, the chromium method detects the still useless micro-processor controlled Automatic Test Equipment of COD, only limit to manually in the laboratory with liquid-feeding tube, clear up bottle, buret operation, length consuming time, only heating is just cleared up needs 2 hours, complicated operation, and the manual analysis task is very heavy, it is very big that test result is influenced by human factor, and consistance is not enough.COD can't often detect in the face of thousands of pollution source unit in environmental protection administrative authority, and this carries out the total amount of pollutants discharged control and management for country and brings difficulty.
At present, the application of microcomputer is very extensive.Design one by micro-processor controlled COD automatic tester, main difficulty is to use the solenoid control quantitative liquid feeding in the transfer pipet road, because reagent solution has strong corrosivity to valve body.
The purpose of this utility model is, overcomes big, the not enough shortcoming of consistance as a result of manual analysis workload, provides a kind of by micro-processor controlled sewage chemical oxygen demand automatic tester, realizes that the continuous automatic on-line of COD of sewage detects.
The composition of the utility model sewage chemical oxygen demand automatic tester comprises the system controlled by computer treating apparatus, sampling pump, liquid-adding device, digestion instrument, titration apparatus, liquid-adding device comprises liquid holding bottle, transfer pipet, liquid-feeding tube, digestion instrument comprises the constant temperature electric furnace, clear up bottle, condenser pipe, titration apparatus comprises syringe pump, titration bottle, the vs liquid holding bottle, it is characterized in that liquid-adding device also comprises air compressor, gas-distribution pipe, snorkel, move liquid electromagnetic valve, add liquid electromagnetic valve, volumetric bottle, clear up charger, solenoid valve is contained on the snorkel, liquid holding bottle and volumetric bottle are airtight container, snorkel is communicated with liquid holding bottle and volumetric bottle top respectively, transfer pipet one end inserts volumetric bottle, its mouth of pipe places quantitative line place, the other end inserts liquid holding bottle, its mouth of pipe places near the bottle bottom, liquid-feeding tube one end inserts volumetric bottle, its mouth of pipe places a bottle bottom, and the other end is connected with glass retaining valve in clearing up charger, and the indicator volumetric bottle liquid-feeding tube other end is communicated with titration bottle top.The utility model has designed pneumatic liquid, the liquid feeding structure of moving, and by the unlatching of each solenoid valve of system controlled by computer, realizes that automatic ration moves liquid, liquid feeding, has avoided reagent solution to valve body and corrosion of pipe, has strengthened the reliability of instrument.
With reference to the accompanying drawings and in conjunction with the embodiments the utility model is described in detail.
Fig. 1 is the utility model general structure synoptic diagram.
As shown in Figure 1, composition of the present utility model comprises system controlled by computer treating apparatus (meaning not shown in the figures), sampling pump 25, liquid-adding device: air compressor 33, gas-distribution pipe 1, snorkel 3, move liquid electromagnetic valve 2,32, add liquid electromagnetic valve 4, liquid holding bottle 7, volumetric bottle 5, transfer pipet 18, liquid-feeding tube 19, clear up charger 29, digestion instrument: constant temperature electric furnace 20, clear up the bottle 21, condenser pipe 30, titration apparatus: syringe pump 13, titration bottle 10, vs liquid holding bottle 14. Solenoid valve 2,4,32 all is contained on the snorkel 3, liquid holding bottle 7 and volumetric bottle 5 are airtight container, snorkel 3 is communicated with liquid holding bottle 7 and volumetric bottle 5 tops respectively, transfer pipet 18 1 ends insert volumetric bottle 5, its mouth of pipe places quantitative line 6 places, the other end inserts liquid holding bottle 7, its mouth of pipe places near the bottle bottom, liquid-feeding tube 19 1 ends insert volumetric bottle 5, its mouth of pipe places a bottle bottom, the other end is connected with glass retaining valve 28 in clearing up charger 29, and indicator volumetric bottle (not drawing among the figure) liquid-feeding tube 8 other ends are communicated with titration bottle 10 tops.
The utility model is as follows by the process that the system controlled by computer automatic ration moves liquid, liquid feeding: the keying of system controlled by computer air compressor 33 and solenoid valve 2,4,32.Open earlier and move liquid electromagnetic valve 2, pressurized air enters liquid holding bottle 7 through gas-distribution pipe 1, snorkel 3, solution in the liquid holding bottle enters volumetric bottle 5 through transfer pipet 18 under compressed-air actuated effect, enter the time of volumetric bottle by control solution, make the liquid level that is pressed into volumetric bottle surpass quantitative line 6, close air compressor and move liquid electromagnetic valve 2, according to law of connected vessels, be higher than quantitative line this moment in the volumetric bottle solution flows back to liquid holding bottle 7 automatically through transfer pipet 18, realizes that automatic ration moves liquid.Air compressor is opened once more, open and add liquid electromagnetic valve 4, pressurized air enters volumetric bottle 5 through gas-distribution pipe, snorkel, volumetric soiutions in the volumetric bottle under the pressurized air effect through liquid-feeding tube 19 with clear up glass retaining valve 28 in the charger 29, all be pressed into and clear up bottle 21, indicator in the indicator volumetric bottle is pressed into titration bottle 10 by liquid-feeding tube 8, finishes the overall process of an automatic ration liquid feeding.
In order to quicken to clear up the process of backflow and detect titration end-point more accurately, the further feature of the utility model is: (1), clear up bottle and forced air cooled tube 22 is set on 21, forced air cooled tube 22 is the long glass tube of inner band burr, cover box 23 is arranged outside the pipe, cover is equipped with cooling fan 27 in the box 23, places the condenser pipe 30 of clearing up charger 29 tops to be coiled pipe, it with clear up charger cavity, forced air cooled tube, clear up and bottle be communicated with, condenser pipe is surrounded by cooling jacket 31 outward, fills static chilled water in the water jacket.Increase forced air cooled tube and adopt static chilled water, overcome in the normal reflux mode and cooled off the many and drawback that under the condition at no tap water water source, can't work of water consumption, quickened digestion process, in the process that heating is cleared up, realize refluxing with circulating water.(2), in titration bottle 10 bottoms the photoelectric detector of being made up of photoelectric cell 17, monochromatic source 16 is housed, when redox reaction during to titration end-point, titration bottle internal reaction liquid color change, the monochromatic light of specific wavelength makes the photoelectric cell current break after by solution, records titration end-point by system controlled by computer.
The brief operation process of the utility model sewage chemical oxygen demand automatic tester is as follows: sampling pump 25 is gathered sewage 24 water samples to water sample volumetric bottle 26, reagent solution in water sample and each liquid holding bottle is cleared up bottle 21 quantitative the adding, heating is under refluxad cleared up, unlatching moves liquid electromagnetic 32, cooled digestion solution is pressed into titration bottle 10 by clearing up bottle, open indicator and add liquid electromagnetic valve (not drawing among the figure), quantitative indicator in the indicator volumetric bottle (not drawing among the figure) is pressed into titration bottle, start precise injection pump 13, open photoelectric detector, to titration end-point, by Microcomputer Calculation, show, the print result value, by tapping valve 15 discharging raffinates, finish one-time detection and analyze overall process.
Among the embodiment, there is the neck of a contraction at volumetric bottle 5 quantitative lines 6 places, this shape helps accurate quantification, be punctured into the inverted cone shape at the bottom of the volumetric bottle bottle, be convenient to volumetric soiutions in the volumetric bottle is all extruded, the titration bottle 10 outer cooling jackets 11 that are surrounded by are equipped with the glassed agitator 12 that is driven by micromachine 9 in the bottle, redox reaction is carried out fully, quicken titration process.
The utlity model has following characteristics: 1, its operation meets standard GB/T 11914-89. 2, automatical analysis is measured, the result accurately and reliably, high conformity alleviates staff's workload, has reduced the specification requirement to the laboratory personnel of enterprise. 3, apparatus structure designs easy and science, the shortening sense cycle. 4, be applicable to various lots of sewage source is carried out continuous on-line monitoring, be conducive to the total amount of sewage discharge control and management.
Claims (6)
1, the sewage chemical oxygen demand automatic tester, form and comprise the system controlled by computer treating apparatus, sampling pump, liquid-adding device, digestion instrument, titration apparatus, liquid-adding device comprises liquid holding bottle, transfer pipet, liquid-feeding tube, digestion instrument comprises the constant temperature electric furnace, clear up bottle, condenser pipe, titration apparatus comprises syringe pump, titration bottle, the vs liquid holding bottle, it is characterized in that liquid-adding device also comprises air compressor, gas-distribution pipe, snorkel, move liquid electromagnetic valve, add liquid electromagnetic valve, volumetric bottle, clear up charger, solenoid valve is contained on the snorkel, liquid holding bottle and volumetric bottle are airtight container, snorkel is communicated with liquid holding bottle and volumetric bottle top respectively, transfer pipet one end inserts volumetric bottle, its mouth of pipe places quantitative line place, the other end inserts liquid holding bottle, its mouth of pipe places near the bottle bottom, and liquid-feeding tube one end inserts volumetric bottle, and its mouth of pipe places a bottle bottom, the other end is connected with glass retaining valve in clearing up charger, and the indicator volumetric bottle liquid-feeding tube other end is communicated with titration bottle top.
2, detector according to claim 1 is characterized in that clearing up forced air cooled tube is set on the bottle, the inner band of forced air cooled tube burr, and pipe is outer the cover box, in the cover box cooling fan is housed.
3, detector according to claim 1 and 2 is characterized in that condenser pipe is a coiled pipe, and pipe is outer to be surrounded by cooling jacket, fills static chilled water in the water jacket.
4, detector according to claim 1 is characterized in that in the titration bottle bottom photoelectric detector of being made up of photoelectric cell, monochromatic source being housed.
5, detector according to claim 1 is characterized in that there is the neck of a contraction at the quantitative line of volumetric bottle place, is punctured into the inverted cone shape at the bottom of the volumetric bottle bottle.
6, detector according to claim 1 is characterized in that titration bottle is surrounded by cooling jacket outward, and the glassed agitator that is driven by micromachine is housed in the bottle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94226567 CN2185437Y (en) | 1994-01-14 | 1994-01-14 | Automatic tester for chemical oxygen demand of sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94226567 CN2185437Y (en) | 1994-01-14 | 1994-01-14 | Automatic tester for chemical oxygen demand of sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2185437Y true CN2185437Y (en) | 1994-12-14 |
Family
ID=33839506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94226567 Expired - Fee Related CN2185437Y (en) | 1994-01-14 | 1994-01-14 | Automatic tester for chemical oxygen demand of sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2185437Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095992C (en) * | 1995-10-09 | 2002-12-11 | 韩国海洋研究所 | Automated analyzing apparatus for measuring water quality with a cylinder-shaped syringe unit |
| CN1648659B (en) * | 2005-02-05 | 2010-08-11 | 浙江小桥流水环境科技有限公司 | Negative pressure atmospheric transport device for COD on-line monitoring analyzer |
| CN101038245B (en) * | 2007-01-29 | 2010-09-08 | 西北大学 | Device and method for preparing calibrating gas |
| CN102565277A (en) * | 2011-12-23 | 2012-07-11 | 上海仪电科学仪器股份有限公司 | Device special for measuring solution chemical oxygen demand (COD) value and use method thereof |
| CN103616277A (en) * | 2013-10-23 | 2014-03-05 | 洛阳高新开发区双阳仪器有限公司 | Chemical oxygen demand determination method free from using mercury salts and silver salts |
| CN104698122A (en) * | 2015-03-18 | 2015-06-10 | 中国热带农业科学院热带作物品种资源研究所 | Foot-powered automatic sample-injection and zero setting titrating system and method |
| CN109060496A (en) * | 2018-11-02 | 2018-12-21 | 上海昂林科学仪器股份有限公司 | A kind of soil organism analyzer and analysis method |
| CN109425687A (en) * | 2017-08-30 | 2019-03-05 | 东亚Dkk株式会社 | COD measurement device and COD measuring method |
-
1994
- 1994-01-14 CN CN 94226567 patent/CN2185437Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095992C (en) * | 1995-10-09 | 2002-12-11 | 韩国海洋研究所 | Automated analyzing apparatus for measuring water quality with a cylinder-shaped syringe unit |
| CN1648659B (en) * | 2005-02-05 | 2010-08-11 | 浙江小桥流水环境科技有限公司 | Negative pressure atmospheric transport device for COD on-line monitoring analyzer |
| CN101038245B (en) * | 2007-01-29 | 2010-09-08 | 西北大学 | Device and method for preparing calibrating gas |
| CN102565277A (en) * | 2011-12-23 | 2012-07-11 | 上海仪电科学仪器股份有限公司 | Device special for measuring solution chemical oxygen demand (COD) value and use method thereof |
| CN103616277A (en) * | 2013-10-23 | 2014-03-05 | 洛阳高新开发区双阳仪器有限公司 | Chemical oxygen demand determination method free from using mercury salts and silver salts |
| CN104698122A (en) * | 2015-03-18 | 2015-06-10 | 中国热带农业科学院热带作物品种资源研究所 | Foot-powered automatic sample-injection and zero setting titrating system and method |
| CN109425687A (en) * | 2017-08-30 | 2019-03-05 | 东亚Dkk株式会社 | COD measurement device and COD measuring method |
| CN109060496A (en) * | 2018-11-02 | 2018-12-21 | 上海昂林科学仪器股份有限公司 | A kind of soil organism analyzer and analysis method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201331497Y (en) | Permanganate index on-line automatic monitor device | |
| CN113311177B (en) | Full-automatic chemical oxygen demand analyzer based on different liquid transfer flow paths | |
| US3740320A (en) | Apparatus and method for measuring the amount of gas absorbed or released by a substance | |
| CN2185437Y (en) | Automatic tester for chemical oxygen demand of sewage | |
| HK1112507A1 (en) | Device for analyzing samples | |
| WO1997014039A1 (en) | An automated analyzing apparatus for measuring water quality with a cylinder-shaped syringe unit | |
| CN1995318B (en) | Anerobic type biological reactor tank | |
| CN201425581Y (en) | COD monitoring device capable of determining digestion time according to scene conditions | |
| CN2485657Y (en) | Automatic inspector for amonia and nitrogen contents in sewage | |
| CN211553896U (en) | Seawater COD online analysis device | |
| CN111239065A (en) | Traditional Chinese medicine extraction online detection system and method | |
| CN202305305U (en) | Timely chlorine ion concentration dilution preprocessing device | |
| CN210142070U (en) | Quick detection and analysis device for chemical oxygen demand of water quality | |
| CN2694278Y (en) | Automatic monitoring instrument for chemical oxygen demand of pollutant source | |
| CN110865072A (en) | Portable water quality acute toxicity detection device | |
| CN201307110Y (en) | Monitor for monitoring water quality total organic carbon | |
| CN110031598A (en) | A kind of Full-automatic water quality sulfide acidification air blowing detection system | |
| CN211505228U (en) | Portable water quality acute toxicity detection device | |
| CN209858552U (en) | Automatic calibrating device for online COD water quality monitor | |
| CN213422971U (en) | Pretreatment device and underground water detection system | |
| CN216378222U (en) | Biochemical reaction testing device for BOD strains | |
| CN216978819U (en) | Water quality chemical oxygen demand online analyzer | |
| CN218766606U (en) | Ammonia nitrogen online rapid measuring device | |
| CN220154268U (en) | Online analyzer for formaldehyde in ambient air | |
| CN214539128U (en) | Continuous automatic analysis device of activated sludge characters |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |