CN1563971A - Calibrator for microoxygen in low oxygen active circulatng system, and its calibration method - Google Patents
Calibrator for microoxygen in low oxygen active circulatng system, and its calibration method Download PDFInfo
- Publication number
- CN1563971A CN1563971A CN 200410033937 CN200410033937A CN1563971A CN 1563971 A CN1563971 A CN 1563971A CN 200410033937 CN200410033937 CN 200410033937 CN 200410033937 A CN200410033937 A CN 200410033937A CN 1563971 A CN1563971 A CN 1563971A
- Authority
- CN
- China
- Prior art keywords
- oxygen
- water
- valve
- hypoxemia
- faraday
- 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.)
- Granted
Links
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
A water transfer valve of uncontaminated water preparation system is connected to a triple valve at input end of hypoxia water active circulatory system, and cascaded to redox resin, positive-negative mixing bed, flowmeter and Faraday electrolytic cell for calibrating oxygen meter. Faraday electrolytic cell is connected to a valve group, and output end of second valve of the valve group is connected to oxygen electrode-joint of system oxygen meter. Another joint of oxygen electrode is connected to artificial taking oxygen pool, hypoxia water pot and circulation pump. The said circulation pump is connected to triple valve at input end of hypoxia water active circulatory systeml. The design considers integrated preparation of uncontaminated water, hypoxia water as well as water circulatory system. Features are; multifunctional, high reliability, high precision ensured by Faraday electrolytic cell as main standard and system oxygen meter as secondary standard.
Description
Technical field
The present invention relates to a kind of calibrating installation and calibration steps thereof of micro amount of oxygen table, the calibration steps of the calibrating installation of particularly a kind of tool integral structure and the active circulation system micro amount of oxygen of multi-functional hypoxemia water and the micro amount of oxygen of tool reliability height and convenient operating maintenance.
Background technology
The online detection of micro amount of oxygen is crucial for the safe operation of thermal power plant boiler in the water, usually judge with artificial water intaking and colourimetry whether operation water-soluble oxygen amount exceeds standard, the oxygen table also has been installed simultaneously comes the dissolved oxygen amount of timing monitoring water to change, the calibration of oxygen table is at present carried out in air, and the concentration of oxygen is the ppm magnitude in the air, this and the actual dissolved oxygen amount that is used in the water of oxygen table are that ppb magnitude difference is very big, oxygen table sensor non-linear, cause test errors bigger, therefore, how to improve the calibration of the oxygen table that is used to detect hypoxemia dissolved oxygen in water amount, accuracy of detection and reliability are crucial problems.
In view of this, in order to overcome above-mentioned shortcoming, this creator is according to oneself practical experience and technical know-how, after deliberation, exploitation, and has the present invention to produce eventually.
Summary of the invention
The present invention is the micro amount of oxygen calibrating installation that the active circulation system of a kind of hypoxemia water will be provided, and makes it improve calibration, accuracy of detection and the raising technology of dependability problem of oxygen table in hypoxemia water with solution.
It is such solving the problems of the technologies described above the technical scheme that is adopted:
The calibrating installation of the active circulation system micro amount of oxygen of a kind of hypoxemia water, the active circulation system of this hypoxemia water is communicated in the clean water preparation system, this clean water preparation system includes the reverse osmosis membrane pipe, tetrahedral water circuit breaker, sintering activity charcoal filter core, the granular activated carbon filter core, the system water pump, fabric filter element, the backwash ball valve, the waste water proportioner, delivery valve, water compensating valve, waste water draining valve and a plurality of T-valve, it is characterized in that: the delivery valve of this clean water preparation system is connected in the T-valve of the active circulation system input end of this hypoxemia water, this T-valve is connected in series a redoxite, sun-the moon mixes bed and flowmeter, this flowmeter end in addition is communicated to faraday's electrolysis pond, faraday's electrolysis electrode in this faraday's electrolysis pond connects a continuous current source, the valve sets that this Faradic electricity electrolytic cell connection one is made up of two valves, second valve output terminal of this valve sets is connected to system's oxygen table electrode one interface, another interface of this oxygen table electrode is connected to and manually gets the oxygen pond, this is manually got the oxygen pond and is communicated to a hypoxemia bucket, this hypoxemia bucket is communicated to an ebullator, this ebullator is communicated on the T-valve of the active circulation system input end of this hypoxemia water, and this is manually got the oxygen pond and is provided with sample cock;
This Faradic electricity electrolytic cell insert one not with water jacket by the oxygen electrode of oxygen detecting meter, be communicated with conduit between two valves of this valve sets;
This Faradic electricity electrolytic cell lid mouthful sealing self is had water jacket by the oxygen electrode of oxygen detecting meter, and tested oxygen electrode one interface is communicated with first valve output terminal of valve sets, and this is communicated with second valve input end of valve sets by another interface of oxygen detecting meter electrode;
This faraday's electrolysis electrode connects a continuous current source.
The calibration steps of the active circulation system micro amount of oxygen of a kind of hypoxemia water calibrating installation, it is characterized in that: this calibration steps is:
(1), opens the clean water preparation system: open water compensating valve, waste water draining valve, delivery valve and backwash ball valve;
(2), open the system water pump: open the system water pump, clean water is through the reverse checkvalve → tetrahedral water circuit breaker → delivery valve → T-valve W1 of reverse osmosis membrane pipe → enter hypoxemia bucket, wherein, waste water enters sewer through T-valve W5 → backwash ball valve, waste water proportioner → T-valve W6 → waste water draining valve;
(3), close backwash ball valve, adjusting waste water ratio: select suitable waste water proportioner that the ratio of clean water and waste water is reached about 1: 3;
(4), open the active circulation system of hypoxemia water: water through T-valve W1 inject redoxite deoxygenation → male-female mix bed deionization → flowmeter → faraday's electrolysis pond, by oxygen detecting meter electrode, valve W3 and W4 (when tested oxygen electrode self is not with water jacket, be communicated with conduit between valve W3 and the W4, inserted faraday's electrolytic cell by the oxygen detecting meter electrode; When tested oxygen electrode self had water jacket, valve W3 and W4 divided and open, valve W3 be communicated with by the oxygen detecting meter electrode, be communicated with valve W4 by another interface of oxygen detecting meter electrode) → system's oxygen table electrode → manually get oxygen pond → hypoxemia bucket → ebullator → T-valve W1;
(5), when hypoxemia bucket water storage is bucket volume 90% left and right sides, close delivery valve, system water pump, water compensating valve and waste water draining valve;
(6), set up the active state of hypoxemia water cycle: regulate ebullator voltage and change rotating speed, make flow reach 250ml/min, hypoxemia water is in the active state of circulation;
(7), returned to zero by oxygen detecting meter: open system oxygen apparent source, the detection system water-soluble oxygen changes, and opens by the oxygen determination apparent source when background oxygen amount is lower than 7 μ g/L, carries out zero point and adjusts;
(8), calibrated by oxygen detecting meter: open faraday's constant-current supply, regulate Faradaic current, both can demarcate the increment of water-soluble oxygen amount as primary standard with faradic currents this moment, and also the indication of available system secondary standard oxygen table is calibrated by oxygen detecting meter;
This oxygen amount calibration range by oxygen detecting meter is 0～50 μ g/L;
The interelectrode water resistance of this faraday is 200k Ω～300k Ω, and this faraday's electrolysis Current Regulation scope is 0～2.5mA.
The present invention proposes to set up the calibration that the active circulation system of hypoxemia water is used for micro amount of oxygen, this device uses faraday's electrode Faradaic current to make primary standard, is secondary standard and provide the oxygen table in the system for oneself as secondary standard, the background dissolved oxygen amount of the active circulation system of hypoxemia water of this system is lower than 7 μ g/L, the interelectrode water resistance of faraday is 200k Ω～300k Ω, and the flow control of recirculated water is at 250ml/min.Because it is proportional to increase the dissolved oxygen amount increment of faraday's Faradaic current and water, therefore can calibrate the oxygen table with faraday's Faradaic current, during calibration, when faraday's electrolysis electric current increases, dissolved oxygen amount is impartial from flowmeter to faraday's electrode, in the limited hydrospace of tested electrode and secondary standard electrode, also just need be equipped with redoxite deoxidation and sun-the moon and mix active devices such as bed removal active ion in the hypoxemia water circulation system, the calibration range of its dissolved oxygen DO increment is 0～50 μ g/L.
The present invention is simple in structure, method is easy, and its advantage is as follows:
1, this system structure design novelty, with the preparation and the circular integration design of the preparation of clean water and hypoxemia water, have multi-functional, reliability is high and operation, characteristics easy to maintenance.
2, calibration steps uniqueness of the present invention, be different from the aerial calibration steps of present oxygen table, it is primary standard as primary standard that this calibrating installation uses faraday's electrolysis electric current, is secondary standard and provide the oxygen table in the system for oneself as secondary standard, this system adopts faraday's electrolysis correcting current oxygen table in the active circulation of hypoxemia water, precision height, good linearity, and tool practicality.
Description of drawings
Fig. 1 is that structure of the present invention is formed synoptic diagram.
Fig. 2 is not formed synoptic diagram with the structure of water jacket for of the present invention by the oxygen detecting meter electrode.
Fig. 3 is of the present invention by the structure of oxygen detecting meter electrode band water jacket composition synoptic diagram.
Fig. 4 is the calibration steps process flow diagram of calibrating installation of the present invention.
Embodiment
As shown in Figure 1, for structure of the present invention is formed synoptic diagram, the active circulation system B of this hypoxemia water is communicated in clean water preparation system A, this clean water preparation system A includes reverse osmosis membrane pipe 1, tetrahedral water circuit breaker 2, sintering activity charcoal filter core 3, granular activated carbon filter core 4, system water pump 5, fabric filter element 6, backwash ball valve 7, waste water proportioner 8, delivery valve 9, water compensating valve 10, waste water draining valve 11 and a plurality of T-valve W5, W6, it is characterized in that: the delivery valve 9 of this clean water preparation system A is connected in the T-valve W1 of the active circulation system B input end of this hypoxemia water, this T-valve W1 is connected in series a redoxite 12, sun-the moon mixes bed 13 and flowmeter 14, this flowmeter 14 end in addition is communicated to faraday's electrolysis pond 15, faraday's electrolysis electrode 16 in this faraday's electrolysis pond 15 connects a continuous current source 17, this Faradic electricity electrolytic cell 15 connects one by two valve W3, the valve sets that W4 forms, second valve W4 of this valve sets output terminal is connected to oxygen electrode 183 1 interfaces 181 of system's oxygen table 18, another interface 182 of the oxygen electrode 183 of this oxygen table 18 is connected to manually gets oxygen pond 19, this is manually got oxygen pond 19 and is communicated to a hypoxemia bucket 20, this hypoxemia bucket 20 is communicated to an ebullator 21, this ebullator 21 is communicated on the T-valve W1 of the active circulation system B input end of this hypoxemia water, and this is manually got oxygen pond 19 and is provided with sample cock W2;
As shown in Figure 2, do not formed synoptic diagram by the oxygen detecting meter electrode with the structure of water jacket for of the present invention, this Faradic electricity electrolytic cell 15 insert one not with water jacket by the oxygen electrode 31 of oxygen detecting meter 30, be communicated with conduit between two valve W3, the W4 of this valve sets;
As shown in Figure 3, formed synoptic diagram for of the present invention by the structure of oxygen detecting meter electrode band water jacket, this Faradic electricity electrolytic cell 15 lids mouthful sealing, be communicated with first valve W3 output terminal of valve sets by oxygen electrode 41 1 interfaces of oxygen detecting meter 40, this is communicated with second valve W4 input end of valve sets by another interface of the oxygen electrode 41 of oxygen detecting meter 40;
This faraday's electrolysis electrode 16 connects a continuous current source 17.
As shown in Figure 4, be the calibration steps process flow diagram of calibrating installation of the present invention, the calibration steps of the active circulation system micro amount of oxygen of this hypoxemia water calibrating installation is:
(1), opens clean water preparation system A: open water compensating valve 10, waste water draining valve 11, delivery valve 9 and backwash ball valve 7;
(2), open the system water pump: open system water pump 5, clean water is through reverse checkvalve 101 → tetrahedral water circuit breaker 2 → delivery valve 9 → T-valve W1 of reverse osmosis membrane pipe 1 → enter hypoxemia bucket 20, wherein, waste water enters sewer through T-valve W5 → backwash ball valve 7, waste water proportioner 8 → T-valve W6 → waste water draining valve 11;
(3), close backwash ball valve 7, adjusting waste water ratio: select suitable waste water proportioner 8 that the ratio of clean water and waste water is reached about 1: 3;
(4), open the active circulation system B of hypoxemia water: water through T-valve W1 inject redoxite 12 deoxygenations → male-female mix bed 13 deionizations → flowmeter 14 → faraday electrolysis pond 15, by the oxygen electrode 31 or 41 of oxygen detecting meter 30 or 40, valve W3 and W4 (when self not being with water jacket by the oxygen electrode 31 of oxygen detecting meter 30, be communicated with conduit between valve W3 and the W4, inserted faraday's electrolytic cell 15 by the oxygen electrode 31 of oxygen detecting meter 30; When self being had water jacket by the oxygen electrode 41 of oxygen detecting meter 40, valve W3 and W4 branch are opened, valve W3 be communicated with by the oxygen electrode 41 of oxygen detecting meter 40, be communicated with valve W4 by another interface of the oxygen electrode 41 of oxygen detecting meter 40) → oxygen electrode 183 of system's oxygen table 18 → manually get oxygen pond 19 → hypoxemia bucket, 20 → ebullator, 21 → T-valve W1;
(5), when hypoxemia bucket 20 water storages are bucket volume 90% left and right sides, close delivery valve 9, system water pump 5, water compensating valve 10 and waste water draining valve 11;
(6), set up the active state of hypoxemia water cycle: the voltage of regulating ebullator 21 changes rotating speed, makes flow reach 250ml/min, and hypoxemia water is in the active state of circulation;
(7), returned to zero by oxygen detecting meter: open system oxygen table 18 power supply, the detection system water-soluble oxygen changes, and opens by oxygen detecting meter 30 or 40 power supplys when background oxygen amount is lower than 7 μ g/L, carries out zero point and adjusts;
(8), calibrated by oxygen detecting meter: open faraday's constant-current supply 17, regulate Faradaic current, can demarcate the increment of water-soluble oxygen amount as primary standard this moment with faraday's Faradaic current, and also the indication of available system secondary standard oxygen table 18 is calibrated by oxygen detecting meter 30 or 40;
This oxygen amount calibration range by oxygen detecting meter 30 or 40 is 0～50 μ g/L;
The interelectrode water resistance of this faraday is 200k Ω～300k Ω, and this faraday's electrolysis Current Regulation scope is 0～2.5mA.
The present invention has also solved the vacuum sealing technology problem of pipeline, valve and the active connection of the active circulation system of hypoxemia water, selected redoxite and sun-the moon to mix bed and solved activating process technology and self-loopa adjustment technology, thereby made this system can be as the primary standard or the secondary standard of oxygen table calibration.
In sum, system structure design novelty of the present invention, the calibration steps uniqueness, its effect has tangible lifting, has novelty, practicality, meets each important document of patent of invention, so propose application for a patent for invention in accordance with the law.
Claims (7)
1; the calibrating installation of the active circulation system micro amount of oxygen of a kind of hypoxemia water; the active circulation system of this hypoxemia water is communicated in the clean water preparation system; this clean water preparation system includes the reverse osmosis membrane pipe; tetrahedral water circuit breaker; sintering activity charcoal filter core; the granular activated carbon filter core; the system water pump; fabric filter element; the backwash ball valve; the waste water proportioner; delivery valve; water compensating valve; waste water draining valve and a plurality of T-valve; it is characterized in that: the delivery valve of this clean water preparation system is connected in the T-valve of the active circulation system input end of this hypoxemia water; this T-valve is connected in series a redoxite; sun-the moon mixes bed and flowmeter; this flowmeter end in addition is communicated to faraday's electrolysis pond; faraday's electrolysis electrode in this faraday's electrolysis pond connects a continuous current source; the valve sets that this Faradic electricity electrolytic cell connection one is made up of two valves; second valve output terminal of this valve sets is connected to oxygen electrode one interface of system's oxygen table; another interface of this oxygen electrode is connected to and manually gets the oxygen pond; this is manually got the oxygen pond and is communicated to a hypoxemia bucket; this hypoxemia bucket is communicated to an ebullator; this ebullator is communicated on the T-valve of the active circulation system input end of hypoxemia water, and this is manually got the oxygen pond and is provided with sample cock.
2, the calibrating installation of the active circulation system micro amount of oxygen of hypoxemia water according to claim 1 is characterized in that: this Faradic electricity electrolytic cell insert one not with water jacket by the oxygen electrode of oxygen detecting meter, be communicated with conduit between two valves of this valve sets.
3, the calibrating installation of the active circulation system micro amount of oxygen of hypoxemia water according to claim 1, it is characterized in that: this Faradic electricity electrolytic cell lid mouthful sealing, self had water jacket by the oxygen electrode of oxygen detecting meter, this is communicated with first valve output terminal of valve sets by oxygen electrode one interface of oxygen detecting meter, and another interface is communicated with second valve input end of valve sets.
4, according to the calibrating installation of claim 2 or the active circulation system micro amount of oxygen of 3 described hypoxemia water, it is characterized in that: this faraday's electrolysis electrode connects a continuous current source.
5, the calibration steps of the active circulation system micro amount of oxygen of a kind of hypoxemia water calibrating installation, it is characterized in that: this calibration steps is:
(1), opens the clean water preparation system: open water compensating valve, waste water draining valve, delivery valve and backwash ball valve;
(2), open the system water pump: open the system water pump, clean water is through the reverse checkvalve → tetrahedral water circuit breaker → delivery valve → T-valve W1 of reverse osmosis membrane pipe → enter hypoxemia bucket, wherein, waste water enters sewer through T-valve W5 → backwash ball valve, waste water proportioner → T-valve W6 → waste water draining valve;
(3), close backwash ball valve, adjusting waste water ratio: select suitable waste water proportioner that the ratio of clean water and waste water is reached about 1: 3;
(4), open the active circulation system of hypoxemia water: water through T-valve W1 inject redoxite deoxygenation → male-female mix bed deionization → flowmeter → faraday's electrolysis pond, by the oxygen electrode of oxygen detecting meter, valve W3 and W4 (when not being with water jacket by the oxygen electrode of oxygen detecting meter self, be communicated with conduit between valve W3 and the W4, inserted faraday's electrolytic cell by the oxygen electrode of oxygen detecting meter; When self being had water jacket by the oxygen electrode of oxygen detecting meter, valve W3 and W4 branch are opened, valve W3 be communicated with by oxygen electrode one interface of oxygen detecting meter, be communicated with valve W4 by another interface of the oxygen electrode of oxygen detecting meter) → oxygen electrode of system's oxygen table → manually get oxygen pond → hypoxemia bucket → ebullator → T-valve W1;
(5), when hypoxemia bucket water storage is bucket volume 90% left and right sides, close delivery valve, system water pump, water compensating valve and waste water draining valve;
(6), set up the active state of hypoxemia water cycle: the voltage of regulating ebullator changes rotating speed, makes flow reach 250ml/min, and hypoxemia water is in the active state of circulation;
(7), returned to zero by oxygen detecting meter: open system oxygen apparent source, the detection system water-soluble oxygen changes, and when background oxygen amount is lower than 7 μ g/L, opens by the oxygen determination apparent source, carries out zero point and adjusts;
(8), calibrated by oxygen detecting meter: open faraday's constant-current supply, regulate Faradaic current, can demarcate the increment of water-soluble oxygen amount as primary standard this moment with faraday's Faradaic current, and also the indication of available system secondary standard oxygen table is calibrated by oxygen detecting meter.
6, the active circulation system of hypoxemia water according to claim 5 little and the amount oxygen calibration steps, it is characterized in that: the oxygen amount calibration range of this oxygen table is 0～50 μ g/L.
7, the calibration steps of the active circulation system micro amount of oxygen of hypoxemia water according to claim 5 is characterized in that: the interelectrode water resistance of this faraday is 200k Ω～300k Ω, and this faraday's electrolysis Current Regulation scope is 0～2.5mA.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410033937 CN1259563C (en) | 2004-04-21 | 2004-04-21 | Calibrator for microoxygen in low oxygen active circulatng system, and its calibration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410033937 CN1259563C (en) | 2004-04-21 | 2004-04-21 | Calibrator for microoxygen in low oxygen active circulatng system, and its calibration method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563971A true CN1563971A (en) | 2005-01-12 |
| CN1259563C CN1259563C (en) | 2006-06-14 |
Family
ID=34481425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410033937 Expired - Fee Related CN1259563C (en) | 2004-04-21 | 2004-04-21 | Calibrator for microoxygen in low oxygen active circulatng system, and its calibration method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1259563C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183087B (en) * | 2007-12-27 | 2011-05-04 | 中国计量科学研究院 | Trace quantity dissolved oxygen instrument test calibration system and calibrate method thereof |
| CN105424769A (en) * | 2015-11-09 | 2016-03-23 | 北京华科仪科技股份有限公司 | Trace dissolved oxygen tester on-line calibrating device and calibration method thereof |
| CN105651953A (en) * | 2015-12-28 | 2016-06-08 | 周海涛 | Calibration device for gauge for dissolved hydrogen in water and calibration method thereof |
| CN107064223A (en) * | 2017-06-27 | 2017-08-18 | 中国大唐集团科学技术研究院有限公司华东分公司 | One kind uses the on-line measurement of Intelligent micro dissolved oxygen analytic instrument and calibration system and method |
| CN107305193A (en) * | 2016-04-19 | 2017-10-31 | 季春峰 | Trace quantity dissolved oxygen instrument on-line calibration and measuring system and method |
-
2004
- 2004-04-21 CN CN 200410033937 patent/CN1259563C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101183087B (en) * | 2007-12-27 | 2011-05-04 | 中国计量科学研究院 | Trace quantity dissolved oxygen instrument test calibration system and calibrate method thereof |
| CN105424769A (en) * | 2015-11-09 | 2016-03-23 | 北京华科仪科技股份有限公司 | Trace dissolved oxygen tester on-line calibrating device and calibration method thereof |
| CN105424769B (en) * | 2015-11-09 | 2018-10-26 | 北京华科仪科技股份有限公司 | A kind of trace dissolved oxygen analyzer on-line calibration device and its calibration method |
| CN105651953A (en) * | 2015-12-28 | 2016-06-08 | 周海涛 | Calibration device for gauge for dissolved hydrogen in water and calibration method thereof |
| CN107305193A (en) * | 2016-04-19 | 2017-10-31 | 季春峰 | Trace quantity dissolved oxygen instrument on-line calibration and measuring system and method |
| CN107305193B (en) * | 2016-04-19 | 2019-06-04 | 季春峰 | Trace quantity dissolved oxygen instrument on-line calibration and measuring system and method |
| CN107064223A (en) * | 2017-06-27 | 2017-08-18 | 中国大唐集团科学技术研究院有限公司华东分公司 | One kind uses the on-line measurement of Intelligent micro dissolved oxygen analytic instrument and calibration system and method |
| CN107064223B (en) * | 2017-06-27 | 2023-10-20 | 中国大唐集团科学技术研究院有限公司华东分公司 | Online measurement and calibration system and method adopting intelligent trace dissolved oxygen analyzer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1259563C (en) | 2006-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207798779U (en) | A kind of gas calibration device | |
| CN108007983B (en) | Device and method for evaluating organic pollution condition of water quality by using microbial fuel cell | |
| CN108896349A (en) | A method of the monitoring contaminated degree of fully-loaded stream | |
| CN1259563C (en) | Calibrator for microoxygen in low oxygen active circulatng system, and its calibration method | |
| CN101183087B (en) | Trace quantity dissolved oxygen instrument test calibration system and calibrate method thereof | |
| CN111678737B (en) | Instrument and method for measuring water quality sampling and dissolved oxygen in constructed wetland matrix | |
| CN217405028U (en) | Heavy metal contaminated site soil-groundwater is restoration processing analogue means in coordination | |
| CN2735341Y (en) | Online automatic monitor for chemical oxygen demand | |
| CN110146574B (en) | Underground water field filtration sampling and dynamic water flow index measuring device and method | |
| CN107064223B (en) | Online measurement and calibration system and method adopting intelligent trace dissolved oxygen analyzer | |
| CN104926023B (en) | Rural domestic sewage treatment system in conjunction with microbiological fuel cell Yu anaerobic manpower wetland | |
| Hombach et al. | Impact of landfill leachate on anaerobic digestion of sewage sludge | |
| CN205263074U (en) | Be used for prosthetic mud of landscape water body normal position - water termination materialization regulation and control system | |
| CN109612902B (en) | System and method for simulating groundwater level fluctuation with controllable temperature and dissolved oxygen | |
| CN104492804A (en) | System and method for repairing polluted soil by pre-processing through ozone and enhancing micro-biological degradation | |
| CN109187286B (en) | Device for simulating pollutant migration rule under soil dry-wet alternation condition and simulation method thereof | |
| Jingsheng et al. | Influence of high levels of total suspended solids on measurement of COD and BOD in the Yellow River, China | |
| CN107364953A (en) | A kind of duct type sewage disposal system | |
| CN113149192A (en) | Aeration regulation and control method for oxidation ditch of municipal sewage treatment system | |
| CN2702277Y (en) | Oil, air and water three-phase flow continuous metering system | |
| CN207828309U (en) | A kind of automatic enrichment culture device of resistance to bacterium with high salt | |
| CN206960208U (en) | A kind of suck-back Combined water spline filter system | |
| CN220564457U (en) | Laboratory inorganic waste water treatment device | |
| CN206848135U (en) | A kind of rock stratum concordant aoxidizes acid etching reaction test device | |
| CN112067682A (en) | Online dissolved oxygen meter zero calibration system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060614 Termination date: 20100421 |