CN101183087B - Trace quantity dissolved oxygen instrument test calibration system and calibrate method thereof - Google Patents
Trace quantity dissolved oxygen instrument test calibration system and calibrate method thereof Download PDFInfo
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- CN101183087B CN101183087B CN2007103014097A CN200710301409A CN101183087B CN 101183087 B CN101183087 B CN 101183087B CN 2007103014097 A CN2007103014097 A CN 2007103014097A CN 200710301409 A CN200710301409 A CN 200710301409A CN 101183087 B CN101183087 B CN 101183087B
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Abstract
The present invention provides a measurement and calibration system and a calibration method for a low-level dissolved oxygen analyzer. The system is a low-level dissolved oxygen water-seal circulation system, which is characterized in that the system comprises a water replenishing device, a gas-water separating device, a micro-aerobic water processing device and a computer control device. The water replenishing device comprises a water replenishing pump, a fiber filter, a granular active carbon filter, an agglutinate active carbon filter and a reverse osmosis membrane component, which is connected with the gas-water separating device. The gas-water separating device comprises a gas-water separator and a tert-water-sealer. The micro-aerobic oxygen water processing device comprises a water tank, a circulating pump, a stabilizer, a deoxidizing filter, an ion exchange resin, a faradic electrolytic cell, a turnover water polo valve, a short circuit tube and a flow meter. The output of the flow meter is connected with the backwater mouth of the gas-water separating device. An oxygen sensor is arranged at the connecting tube output end of the faradic electrolytic cell. The system expands the range of the domestic measurement system for dissolved oxygen and evaluates the uncertainty of the calibration quantity value dissolved oxygen in water at the first time and provides a reliable technical guarantee to the transmitting of the quantity value.
Description
Technical field
The present invention relates to a kind of calibrating installation of trace quantity dissolved oxygen instrument, the trace quantity dissolved oxygen instrument assay calibration system that particularly oligodynamical oxygen value in the water is monitored accurately and reliably and the numerical value that trace quantity dissolved oxygen instrument is measured is examined and determine.
Background technology
The monitoring accurately and reliably of oligodynamical oxygen value in the water to preventing the corrosion of boiler or other power-equipment, guarantees that its safe operation has great significance, and is the important leverage of safety in production, also is the major issue that energy savings is benefited the nation and the people.At present, the measuring method of trace dissolved oxygen mainly contains two kinds both at home and abroad, and a kind of is visual colorimetry, and another kind is the trace quantity dissolved oxygen instrument determination method, and present measurement transfers the monitoring of measuring instrument basically to from artificial colorimetric.Though the oligodynamical oxygen measuring device is simple to operate, resolution is high, good reproducibility, and can be installed on the pipeline trace dissolved oxygen is carried out on-line measurement, monitoring in real time, signal rapid, that continue is provided, and still, the accuracy of oligodynamical oxygen measuring device can't guarantee in the water.In addition, domestic do not have the relevant detection means now to important technology indexs such as the accuracy of trace dissolved oxygen analyzer and repeatability, can't examine and determine it.
In view of this, this creator studies, develops the present invention according to practical experience and technical concept.
Summary of the invention
The present invention will provide a kind of trace quantity dissolved oxygen instrument assay calibration system and calibration steps thereof, examines and determine to solve the numerical value that trace quantity dissolved oxygen instrument is measured, and makes technical indicator technical matters more accurately and reliably.
It is such solving the problems of the technologies described above the technical scheme that is adopted:
A kind of trace quantity dissolved oxygen instrument assay calibration system, this system is the trace dissolved oxygen water seal circulation system, it is characterized in that: this system includes water replanishing device, gas and water separator, micro amount of oxygen water disposal facility and Computer Control Unit;
This water replanishing device includes the small pump of a connection water inlet, the small pump output terminal is connected with fabric filter, gac filtration device, sintering activity carbon filter and reverse osmosis membrane assembly in turn, and the pure water outlet of reverse osmosis membrane assembly is connected to the T-valve of gas and water separator by a solenoid valve;
This gas and water separator includes a moisture trap, T-valve and three grades of liquid packings, moisture trap includes a housing, housing is provided with filling pipe, gas outlet and rising pipe, the filling pipe outer end is provided with water supplement port, water supplement port connects T-valve, T-valve is communicated with a water return outlet, and gas outlet is connected to three grades of liquid packings, and rising pipe is communicated to the water tank of micro amount of oxygen water disposal facility;
This micro amount of oxygen water disposal facility includes a water tank, water tank connects an ebullator, outlet of circulating pump connects a current regulator, current regulator connects a deoxygenation filtrator, the deoxygenation filtrator connects an amberlite grease filter, the amberlite grease filter connects faraday's electrolysis pond inlet, one of faraday's electrolysis pond is taken over outlet and is connected the lambda sensor water inlet, the lambda sensor water delivering orifice connects a water intake ball valve, this water intake ball valve connects a short circuit pipe, the short circuit pipe other end connects a water outlet ball valve, but be provided with straight-through the cutting ferrule convenient and clutch of being connected in the middle of the short circuit pipe by the school trace quantity dissolved oxygen instrument, the outlet of this water outlet ball valve connects a flowmeter, and the outlet of flowmeter is connected to the water return outlet of gas and water separator;
This faraday's electrolysis pond includes a shell, and shell upper end hollow joint is connected with adapter, and electrode tip holder is equipped with in the shell lower end, is inserted with electrolysis electrode in the electrode tip holder, and the shell middle part offers water inlet pipe;
This lambda sensor includes a sensor holder and a sensor wrap, the sensor holder top is equiped with cable socket, the sensor wrap sidewall is provided with water delivering orifice, sensor wrap is equiped with a nozzle in the middle of the bottom, the nozzle bottom is equiped with water inlet and calibration electrodes, be equiped with the electronics chamber of aiming at nozzle in the sensor wrap, bottom, electronics chamber upwards is connected with sensor holder, bottom, electronics chamber is provided with collet, the collet center is equiped with the galactic pole around a gold medal utmost point seat and the golden utmost point seat, gold utmost point seat top and top, electronics chamber form electronics chamber solution and inject collar extension, in the gold utmost point seat thermistor is housed, golden utmost point seat top is provided with the golden utmost point, and gold is coated with the oxygen flow film on extremely, the oxygen flow film is fixed on electronics chamber injection collar extension by the film bracket and gold is extremely surperficial, and top, electronics chamber spiral shell is provided with the gland of fastening film bracket;
This Computer Control Unit is a micro treatmenting device, include industrial computer, data acquisition unit, printer, display screen and self-control software, this industrial computer is provided with the oxygen electrode signal input interface of lambda sensor and by school trace quantity dissolved oxygen instrument signal input interface, the water outlet ball valve before this Computer Control Unit control linkage small pump, ebullator, flowmeter and the Faradaic current regulator in faraday's electrolysis pond are finished the automatic control and the data processing of system;
Be connected with the backwash ball valve between the wastewater outlet of this reverse osmosis membrane assembly and the waste water bottle;
This ebullator is connected with water flow regulator;
This current regulator is the damping constant-current stabilizer, includes a shell, is provided with the spirality damper tube between the inlet of shell and the outlet;
This flow is counted suspended body flowmeter, includes a glass tube and upper and lower stop, and the float lower end in the glass tube is provided with crotch, and flowmeter is provided with fixedly display highlighting;
These three grades of liquid packings comprise three water-sealed containers, and each container lower space is injected water, and its upper space is an air chamber, and draft tube is inserted in the water, and escape pipe is drawn in air chamber.
The calibration steps of this trace quantity dissolved oxygen instrument assay calibration system, comprise unlatching trace quantity dissolved oxygen instrument assay calibration system, set up trace dissolved oxygen water cycle state, returned to zero by the school trace quantity dissolved oxygen instrument and the trace quantity dissolved oxygen instrument calibration, it is characterized in that: the electrolytic efficiency curve in the faraday's electrolysis pond under this trace dissolved oxygen water cycle state is measured by the electrolytic efficiency measurement mechanism;
This electrolytic efficiency measurement mechanism includes a glass container electrolytic cell, is equiped with oxygen electrode and hydrogen electrode in the electrolytic cell, and wherein, this electrolytic cell bottom inwardly is the groove shape, is equiped with thermistor in the groove, and thermistor connects a thermometer;
This electrolytic cell top connects establishes a gas outlet, the outer sheathed connecting pipe of gas outlet also is connected with the electrolytic cell top, the other end of connecting pipe is communicated with a gas blowoff basin, and the outer end of its gas outlet is positioned at gas blowoff basin centre, and the top end opening place of gas blowoff basin is equipped with sealing shroud;
This connecting pipe middle part connects a L shaped buret;
Oxygen electrode and hydrogen electrode in this electrolytic cell are connected to a constant current source;
The range ability of this assay calibration system is 0～100 μ g/L;
The background oxygen of this assay calibration system is lower than 4 μ g/L, and the lambda sensor aftercurrent is less than 0.5 μ g/L.
The present invention can realize to both at home and abroad that newly buy, on-line operation, after safeguarding and the trace quantity dissolved oxygen instrument of production unit before dispatching from the factory carry out assay calibration accurately and reliably.
This system forms the automatic micro amount of oxygen water seal circulation system by Computer Control Unit control by water replanishing device, gas and water separator, micro amount of oxygen water disposal facility.
The water tank of micro amount of oxygen water disposal facility is connected with moisture trap, the moisture trap top connects a threeway, one logical is connected with water replanishing device, another logical outlet with flowmeter is connected, the inlet of flowmeter connects a water outlet ball valve, the water outlet ball valve connects the short circuit pipe, the straight-through cutting ferrule at short circuit pipe middle part separately, and respectively with advancing by the school trace quantity dissolved oxygen instrument, rising pipe is communicated with, the short circuit pipe other end connects water intake ball valve, the inlet of water intake ball valve connects the water delivering orifice of lambda sensor, the lambda sensor water inlet connects the adapter outlet of faraday's electrolytic cell, the water inlet in faraday's electrolysis pond is connected with the outlet of amberlite grease filter, the inlet of amberlite grease filter is connected with the deoxygenation filter outlet, and the inlet of deoxygenation filtrator connects current regulator, and the inlet of current regulator connects ebullator, the inlet of ebullator connects the outlet of water tank, constitutes a circulating device.
Gas outlet at moisture trap connects three grades of water seals, and its effect is to stop air to enter the circulation system, and the gas that produces in the system is discharged by three grades of water seals after being separated by moisture trap.
Computer Control Unit is the core of control Faradaic current output, discharge adjusting, ebullator and small pump, has the input of control oxygen electrode signal again, by functions such as data processing after the background affirmation of the input of school oxygen table signal, micro amount of oxygen water disposal facility and the assay calibration.
The present invention is simple in structure, and its advantage is as follows:
1, the principle of foundation of the present invention is reliable, and method is correct, and is workable.A plurality of key problem in technology such as the development of demarcation, background oxygen water treatment system of mensuration, the brine electrolysis flow of making, the electrolytic efficiency in the determining of the determining of background oxygen in the assay calibration system, supporting electrolyte, faraday's electrolysis pond and instrument design of electronic circuits have been solved.
2, the present invention has expanded the calibrating scope of domestic dissolved oxygen DO verification system, has ensured the accurate unanimity of China's dissolved oxygen DO value, and accurately provides reliable guidance for transmission of quantity value.
3, the present invention is applicable to assay calibration after domestic, external that newly buy, on-line operation, the maintenance and the trace quantity dissolved oxygen instrument of production unit before dispatching from the factory, range ability is 0～100 μ g/L, uncertainty is 4 μ g/L (k=2), repeatability is 2 μ g/L, background oxygen is less than 4 μ g/L, the lambda sensor aftercurrent is less than 0.5 μ g/L, for transmission of quantity value provides the robust techniques guarantee, and the tool practicality.
Description of drawings
Fig. 1 is a surface structure synoptic diagram of the present invention.
Fig. 2 is a system architecture synoptic diagram of the present invention.
Fig. 3 is a Computer Control Unit connection diagram of the present invention.
Fig. 4 is a moisture trap structural representation of the present invention.
Fig. 5 is a current regulator structural representation of the present invention.
Fig. 6 is a flowmeter structure synoptic diagram of the present invention.
Fig. 7 is faraday's electrolysis pool structure synoptic diagram of the present invention.
Fig. 8 is three grades of liquid packing structural representations of the present invention.
Fig. 9 is a lambda sensor structural representation of the present invention.
Figure 10 is a principle of work block scheme of the present invention.
Figure 11 is the operating function embodiment synoptic diagram of Computer Control Unit display screen of the present invention.
Figure 12 is an electrolytic efficiency measurement mechanism structural representation of the present invention.
Embodiment
As shown in Figure 1, 2, 3, be surface structure of the present invention and system architecture synoptic diagram, this trace quantity dissolved oxygen instrument assay calibration system 100 is the trace dissolved oxygen water seal circulation system, wherein, this system 100 includes water replanishing device 10, gas and water separator 20, micro amount of oxygen water disposal facility 40 and Computer Control Unit 70;
This water replanishing device 10 includes the small pump 11 of a connection water inlet, small pump 11 output terminals are connected with fabric filter 12, gac filtration device 13, sintering activity carbon filter 14 and reverse osmosis membrane assembly 15 in turn, the pure water outlet of reverse osmosis membrane assembly 15 is connected to the T-valve 30 of gas and water separator 20 by a solenoid valve 16, wherein moisturizing bottle 19 connects moisturizing interface 33 with flexible pipe, and wastewater outlet 34 is connected to waste water bottle 18 with flexible pipe; The worktable surface of this system 100 be provided with Computer Control Unit 70, by school oxygen table connect 82, the electrolysis electrode interface 66 in USB interface 83, moisturizing switch 84, ebullator switch 85, total power switch 86, correcting current interface 35, secondary liquid packing 32, three grades of liquid packings 31, flowmeter 50, water intake ball valve 47, water outlet ball valve 48, lambda sensor 90 and faraday's electrolysis ponds 60.
This gas and water separator 20 includes a moisture trap 21, T-valve 30 and three grades of liquid packings 31, as shown in Figure 4, this moisture trap 21 includes a housing 22, housing 22 is provided with filling pipe 24, gas outlet 27 and rising pipe 28, filling pipe 24 outer ends are provided with water supplement port 25, and water supplement port 25 connects T-valve 30, and T-valve 30 is communicated with a water return outlet 26, gas outlet 27 is connected to three grades of liquid packings 31 (as shown in Figure 8), and rising pipe 28 is communicated to the water tank 41 of micro amount of oxygen water disposal facility 40;
This micro amount of oxygen water disposal facility 40 includes a water tank 41, water tank 41 connects an ebullator 43, the outlet of ebullator 43 connects a current regulator 44, current regulator 44 connects a deoxygenation filtrator 45, deoxygenation filtrator 45 connects an amberlite grease filter 46, amberlite grease filter 46 connects the inlet 62 in faraday's electrolysis pond 60,63 outlet connection lambda sensor 90 water inlets 905 are taken in one of faraday's electrolysis pond 60, lambda sensor 90 water delivering orifices 906 connect a water intake ball valve 47, this water intake ball valve 47 connects a short circuit pipe 49, short circuit pipe 49 other ends connect a water outlet ball valve 48, but be provided with straight-through the cutting ferrule 491 convenient and clutch of being connected in the middle of the short circuit pipe 49 by school trace quantity dissolved oxygen instrument 80, the outlet of this water outlet ball valve 48 connects a flowmeter 50, and the outlet of flowmeter 50 is connected to the water return outlet 26 (as shown in Figure 4) of gas and water separator 20;
As shown in Figure 7, this faraday's electrolysis pond 60 includes a shell 61, and shell 61 upper end hollow joints 64 are connected with takes over 63, and electrode tip holder 65 is equipped with in shell 61 lower ends, is inserted with electrolysis electrode 66,67 in the electrode tip holder 65, and shell 61 middle parts offer water inlet pipe 62;
As shown in Figure 9, this lambda sensor 90 includes a sensor holder 901 and a sensor wrap 907, sensor holder 901 tops are equiped with cable socket 902, sensor wrap 907 sidewalls are provided with water delivering orifice 906, be equiped with a nozzle 903 in the middle of sensor wrap 907 bottoms, nozzle 903 bottoms are equiped with water inlet 905 and calibration electrodes 904, be equiped with the electronics chamber 97 of aiming at nozzle 903 in the sensor wrap 907,97 bottoms, electronics chamber upwards are connected with sensor holder 901,97 bottoms, electronics chamber are provided with collet 99, collet 99 centers are equiped with the galactic pole 98 around a gold medal utmost point seat 96 and the golden utmost point seat 96, gold utmost point seat 96 tops and 97 tops, electronics chamber form electronics chamber 97 solution and inject collar extension, in the gold utmost point seat 96 thermistor 95 is housed, gold utmost point seat 96 tops are provided with the golden utmost point 91, be coated with oxygen flow film 92 on the gold utmost point 91, oxygen flow film 92 is fixed on electronics chamber 97 by film bracket 93 and injects collar extension and the golden utmost point 91 surfaces, and electronics chamber 97 top spiral shells are provided with the gland 94 of fastening film bracket 93;
This Computer Control Unit 70 is a micro treatmenting device, include industrial computer 71, data acquisition unit, printer 73, display screen 72 and self-control software, this industrial computer 71 is provided with the oxygen electrode signal input interface 74 of lambda sensor 90 and by school trace quantity dissolved oxygen instrument 80 signal input interfaces 75, the water outlet ball valve 48 before these Computer Control Unit 70 control linkage small pumps 11, ebullator 43, flowmeter 50 and the Faradaic current regulator 69 (constant current source) in faraday's electrolysis pond 60 are finished the automatic control and the data processing of system;
18 in the wastewater outlet end of this reverse osmosis membrane assembly 15 and waste water bottle are connected with backwash ball valve 17;
This ebullator 43 is connected with water flow regulator 42;
As shown in Figure 5, this current regulator 44 is the damping constant-current stabilizer, includes a shell 441, is provided with spirality damper tube 444 between the inlet 442 of shell 441 and the outlet 443;
As shown in Figure 6, this flowmeter 50 is a suspended body flowmeter, includes support body 51, glass tube 52 and upper and lower stop 54,53, and float 55 lower ends in the glass tube 52 are provided with crotch 56, and flowmeter 50 is provided with fixedly display highlighting 57;
As shown in Figure 8, these three grades of liquid packings 31 comprise three water-sealed containers 314, and each water-sealed container 314 lower space 315 is injected water, and its upper space 313 is an air chamber, draft tube 311 is inserted in the water of lower space 315, and escape pipe 312 is drawn in upper space 313 air chambers;
As shown in figure 10, be principle of work block scheme of the present invention, the mentality of designing of trace quantity dissolved oxygen instrument assay calibration system is: the calibrating water is by background oxygen water treatment system, remove the dissolved oxygen DO in anhydrating, become background oxygen water (for various reasons, a certain amount of background oxygen is always arranged) in the system, then, background oxygen water is by flowmeter 50, flowmeter 50 measure water flows (generally being controlled at 250mL/min), background oxygen water flows into faraday's electrolysis system, constant current source 69 provides constant Faradaic current (limits of error are 0.01mA), and the background oxygen water electrolysis in faraday's electrolysis pond 60 produces a certain amount of standard oxygen increment, generates the standard oxygen water of calibrating usefulness, then standard oxygen water flow into be connected in the system by school oxygen table 80, according to the dissolved oxygen content of standard oxygen water just can assay calibration by school oxygen table 80; Standard oxygen water flows into ebullator 43, ebullator 43 pumps into background oxygen water treatment system again with standard oxygen water, and background oxygen water treatment system is removed the dissolved oxygen DO in the water again, generates background oxygen water, so just finished once circulation, this circulation is to finish under the monitoring of Computer Control Unit 70.
As shown in figure 11, operating function embodiment synoptic diagram for Computer Control Unit display screen of the present invention, this Computer Control Unit 70 can intuitive operation, the various performance parameters that shows this trace quantity dissolved oxygen instrument assay calibration system and dissolved oxygen trend curve, has control, adjusting, signals collecting and Presentation Function.
The calibration steps of this trace quantity dissolved oxygen instrument assay calibration system, comprise unlatching trace quantity dissolved oxygen instrument assay calibration system, set up trace dissolved oxygen water cycle state, returned to zero by the school trace quantity dissolved oxygen instrument and the trace quantity dissolved oxygen instrument calibration, wherein, the electrolytic efficiency curve in the faraday's electrolysis pond 60 under this trace dissolved oxygen water cycle state is measured by electrolytic efficiency measurement mechanism 81.
As shown in figure 12, be electrolytic efficiency measurement mechanism structural representation of the present invention, this electrolytic efficiency measurement mechanism 81, include a glass container electrolytic cell 82, be equiped with oxygen electrode 83 and hydrogen electrode 84 in the electrolytic cell 82, wherein, electrolytic cell 82 bottoms inwardly are the groove shape, be equiped with thermistor 85 in the groove, thermistor 85 connects a thermometer 851;
These electrolytic cell 82 tops connect establishes a gas outlet 86, the outer sheathed connecting pipes 87 of gas outlet 86 also are connected with electrolytic cell 82 tops, the other end of connecting pipe 87 is communicated with a gas blowoff basin 88, the outer end of its gas outlet 86 is positioned at gas blowoff basin 88 centres, and the top end opening place of gas blowoff basin 88 is equipped with sealing shroud 89;
These connecting pipe 87 middle parts connect a L shaped buret 871, L shaped buret 871 internal diameters 4～8 μ m;
The range ability of this assay calibration system is 0～100 μ g/L;
The background oxygen of this assay calibration system is lower than 4 μ g/L, and lambda sensor 90 aftercurrents are less than 0.5 μ g/L.
The electrolytic efficiency of recirculated water is measured with electrolysis special efficiency measurement device 81 in this trace quantity dissolved oxygen instrument assay calibration system 100, its principle of work is based on Faraday's laws of electrolysis, promptly in systemic circulation water, pass to electric current for faraday's electrode, make water electrolysis produce hydrogen and oxygen, when the constant flow of water, accurately measure electric current by electrolysis electrode, can calculate the increment of the standard dissolved oxygen DO of generation.
Trace dissolved oxygen in the trace quantity dissolved oxygen instrument assay calibration system should be:
DO
Standard=DO
Background+ Δ O
2(1)
In the formula: DO
Background---background oxygen unit: μ g/L
Δ O
2---standard dissolved oxygen DO increment unit: μ g/L
ΔO
2＝ηI·4974.85/V…………(2)
η---the electrolytic efficiency of system water wherein
η=U
Real/ U
Reason(3)
In the formula: I---the mA of Faradaic current unit
V---discharge unit/ml
U
Real---the gas volume unit/ml that actual brine electrolysis produced
U
Reason---the gas volume unit/ml that theoretical brine electrolysis produced
U wherein
Real---the gas volume that actual brine electrolysis produced can calculate by V value on the buret 871, thereby this electrolytic efficiency measurement mechanism can be measured electrolytic efficiency curve under the different Faradaic current conditions, determine the standard dissolved oxygen DO increment under the different Faradaic current conditions, use during for practical operation.
The present invention has expanded the calibrating scope of domestic dissolved oxygen DO verification system, ensured the accurate unanimity of China's dissolved oxygen DO value, solved the numerical value calibrating that trace quantity dissolved oxygen instrument is measured, estimated the value uncertainty of trace dissolved oxygen calibration in the water first, make technical indicator more accurately and reliably, for the assay calibration of the trace quantity dissolved oxygen instrument of production unit before dispatching from the factory provides technical guarantee accurately and reliably.
In sum, effect of the present invention 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 (10)
1. trace quantity dissolved oxygen instrument assay calibration system, this system is the trace dissolved oxygen water seal circulation system, it is characterized in that: this system includes water replanishing device, gas and water separator, micro amount of oxygen water disposal facility and Computer Control Unit;
This water replanishing device includes the small pump of a connection water inlet, the small pump output terminal is connected with fabric filter, gac filtration device, sintering activity carbon filter and reverse osmosis membrane assembly in turn, and the pure water outlet of reverse osmosis membrane assembly is connected to the T-valve of gas and water separator by a solenoid valve;
This gas and water separator includes a moisture trap, T-valve and three grades of liquid packings, moisture trap includes a housing, housing is provided with filling pipe, gas outlet and rising pipe, the filling pipe outer end is provided with water supplement port, water supplement port connects T-valve, T-valve is communicated with a water return outlet, and gas outlet is connected to three grades of liquid packings, and rising pipe is communicated to the water tank of micro amount of oxygen water disposal facility;
This micro amount of oxygen water disposal facility includes a water tank, water tank connects an ebullator, outlet of circulating pump connects a current regulator, current regulator connects a deoxygenation filtrator, the deoxygenation filtrator connects an amberlite grease filter, the amberlite grease filter connects faraday's electrolysis pond inlet, the adapter outlet in faraday's electrolysis pond connects the lambda sensor water inlet, the lambda sensor water delivering orifice connects a water intake ball valve, this water intake ball valve connects a short circuit pipe, the short circuit pipe other end connects a water outlet ball valve, but be provided with straight-through the cutting ferrule convenient and clutch of being connected in the middle of the short circuit pipe by the school trace quantity dissolved oxygen instrument, the outlet of this water outlet ball valve connects a flowmeter, and the outlet of flowmeter is connected to the water return outlet of gas and water separator;
This faraday's electrolysis pond includes a shell, and shell upper end hollow joint is connected with adapter, and electrode tip holder is equipped with in the shell lower end, is inserted with electrolysis electrode in the electrode tip holder, and the shell middle part offers water inlet pipe;
This lambda sensor includes a sensor holder and a sensor wrap, the sensor holder top is equiped with cable socket, the sensor wrap sidewall is provided with water delivering orifice, sensor wrap is equiped with a nozzle in the middle of the bottom, the nozzle bottom is equiped with water inlet and calibration electrodes, be equiped with the electronics chamber of aiming at nozzle in the sensor wrap, bottom, electronics chamber upwards is connected with sensor holder, bottom, electronics chamber is provided with collet, the collet center is equiped with the galactic pole around a gold medal utmost point seat and the golden utmost point seat, gold utmost point seat top and top, electronics chamber form electronics chamber solution and inject collar extension, in the gold utmost point seat thermistor is housed, golden utmost point seat top is provided with the golden utmost point, and gold is coated with the oxygen flow film on extremely, the oxygen flow film is fixed on electronics chamber injection collar extension by the film bracket and gold is extremely surperficial, and top, electronics chamber spiral shell is provided with the gland of fastening film bracket;
This Computer Control Unit is a micro treatmenting device, include industrial computer, data acquisition unit, printer and display screen, this industrial computer is provided with the oxygen electrode signal input interface of lambda sensor and by school trace quantity dissolved oxygen instrument signal input interface, the water outlet ball valve before this Computer Control Unit control linkage small pump, ebullator, the flowmeter and the Faradaic current regulator in faraday's electrolysis pond.
2. trace quantity dissolved oxygen instrument assay calibration according to claim 1 system is characterized in that: be connected with the backwash ball valve between the wastewater outlet of this reverse osmosis membrane assembly and the waste water bottle.
3. trace quantity dissolved oxygen instrument assay calibration according to claim 1 system, it is characterized in that: this ebullator is connected with water flow regulator.
4. trace quantity dissolved oxygen instrument assay calibration according to claim 1 system, it is characterized in that: this current regulator is the damping constant-current stabilizer, includes a shell, is provided with the spirality damper tube between the inlet of shell and the outlet.
5. trace quantity dissolved oxygen instrument assay calibration according to claim 1 system, it is characterized in that: this flow is counted suspended body flowmeter, includes a glass tube and upper and lower stop, and the float lower end in the glass tube is provided with crotch, and flowmeter is provided with fixedly display highlighting.
6. trace quantity dissolved oxygen instrument assay calibration according to claim 1 system, it is characterized in that: these three grades of liquid packings comprise three water-sealed containers, and each container lower space is injected water, and its upper space is an air chamber, draft tube is inserted in the water, and escape pipe is drawn in air chamber.
7. the calibration steps of trace quantity dissolved oxygen instrument assay calibration according to claim 1 system, comprise unlatching trace quantity dissolved oxygen instrument assay calibration system, set up trace dissolved oxygen water cycle state, returned to zero by the school trace quantity dissolved oxygen instrument and the trace quantity dissolved oxygen instrument calibration, it is characterized in that: the electrolytic efficiency curve in the faraday's electrolysis pond under this trace dissolved oxygen water cycle state is to be measured by the electrolytic efficiency measurement mechanism.
8. the calibration steps of trace quantity dissolved oxygen instrument assay calibration according to claim 7 system, it is characterized in that: this electrolytic efficiency measurement mechanism, include a glass container electrolytic cell, be equiped with oxygen electrode and hydrogen electrode in the electrolytic cell, wherein, the electrolytic cell bottom inwardly is the groove shape, is equiped with thermistor in the groove, and thermistor connects a thermometer;
This electrolytic cell top connects establishes a gas outlet, the outer sheathed connecting pipe of gas outlet also is connected with the electrolytic cell top, the other end of connecting pipe is communicated with a gas blowoff basin, and the outer end of its gas outlet is positioned at gas blowoff basin centre, and the top end opening place of gas blowoff basin is equipped with sealing shroud;
This connecting pipe middle part connects a L shaped buret;
Oxygen electrode and hydrogen electrode in this electrolytic cell are connected to a constant current source.
9. the calibration steps of trace quantity dissolved oxygen instrument assay calibration according to claim 7 system, it is characterized in that: the range ability of this assay calibration system is 0～100 μ g/L.
10. the calibration steps of trace quantity dissolved oxygen instrument assay calibration according to claim 7 system, it is characterized in that: the background oxygen of this assay calibration system is lower than 4 μ g/L, and the lambda sensor aftercurrent is less than 0.5 μ g/L.
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| CN104515761B (en) * | 2014-12-20 | 2017-05-17 | 国家海洋局第二海洋研究所 | High-precision optical dissolved oxygen sensor calibration method and device |
| 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 |
| CN107305193B (en) * | 2016-04-19 | 2019-06-04 | 季春峰 | Trace quantity dissolved oxygen instrument on-line calibration and measuring system and method |
| CN106442680B (en) * | 2016-11-11 | 2018-07-06 | 山东省计量科学研究院 | A kind of portable electrochemical method dissolved oxygen meter calibration 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 |
| CN113267481B (en) * | 2021-07-20 | 2021-10-08 | 常州罗盘星检测科技有限公司 | Dissolved oxygen's calbiration system |
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| US5098547A (en) * | 1988-10-11 | 1992-03-24 | Bryan Avron I | Dissolved oxygen sensor calibration, monitoring and reporting system |
| CN2528011Y (en) * | 2002-04-05 | 2002-12-25 | 季春峰 | On-line trace dissolved oxygen standard generator |
| CN1563971A (en) * | 2004-04-21 | 2005-01-12 | 季春峰 | Calibrator for microoxygen in low oxygen active circulatng system, and its calibration method |
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| CN101183087A (en) | 2008-05-21 |
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