CN107064232A - The measuring method and device of a kind of power plant's water degasification hydrogen conductivity - Google Patents
The measuring method and device of a kind of power plant's water degasification hydrogen conductivity Download PDFInfo
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- CN107064232A CN107064232A CN201710049444.8A CN201710049444A CN107064232A CN 107064232 A CN107064232 A CN 107064232A CN 201710049444 A CN201710049444 A CN 201710049444A CN 107064232 A CN107064232 A CN 107064232A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
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Abstract
The present invention relates to a kind of measuring method of power plant's water degasification hydrogen conductivity and device, belong to water treatment of power plant field.Measurement apparatus, include the flow cell for being provided with conductivity electrode, the flow cell is connected by pipeline with water intaking valve, top is connected with extraction valve, vavuum pump successively by pipeline, the bottom of the flow cell or lower sidewall are connected by pipeline with draining valve, are also connected at the top of the flow cell with pressure vacuum gauge.The present invention vacuumizes flow cell with vavuum pump, so, the CO dissolved in sample water2Will because pressure reduction and solubility decline and separate out, reach to CO in water2The purpose of removal.The CO due to being dissolved in water can be solved2, when causing measurement hydrogen conductance, the problem of measured value is higher.
Description
Technical field
The present invention relates to a kind of measuring method of power plant's water degasification hydrogen conductivity and device, belong to water treatment of power plant field.
Background technology
Hydrogen conductivity is sample water by the electrical conductivity measured after hydrogen form cation resin treatment, for characterizing steam sample
The number of middle anion-content.It is the important indicator for reflecting therrmodynamic system water and steam quality.
But, when containing carbon dioxide in sample, CO2Carbanion can be formed by being dissolved in sample water, cation exchange
Post can not remove carbanion, then CO2The measurement than leading and sun is led will be influenceed, raises measured value, and cause vapour
The problems such as unqualified, unit starting time lengthening in water qualitative data.By to CO in sample water2Removal, can well
Solve this problem.After effective degasification measure, the carbanion in sample water is removed, hydrogen conductivity now（Or
Degasification conductance）The influence of sample impurities in water could really be reflected.
The content of the invention
For the CO occurred in the existing measurement to hydrogen conductivity2The problem of interference, the technical problems to be solved by the invention
It is to provide the measuring method and device of a kind of power plant's water degasification hydrogen conductivity.
Sample water is placed in closed flow cell by the present invention, is vacuumized, and reduces the pressure of sample water surrounding enviroment,
CO2The feature that solubility in water declines as pressure declines, the CO in sample water2Remove.Installed in closed flow cell
On vacuum meter can indicate vacuum, the conductivity electrode on closed flow cell can measure CO in real time2It is removed
Hydrogen conductivity value afterwards, at this moment can also be degassing conductance.
To achieve the above objectives, the technical solution adopted by the present invention is：A kind of measurement dress of power plant's water degasification hydrogen conductivity
Put, comprising the flow cell for being provided with conductivity electrode, the flow cell is connected by pipeline with water intaking valve, top by pipeline according to
Secondary to be connected with extraction valve, vavuum pump, the bottom of the flow cell or lower sidewall are connected by pipeline with draining valve, the circulation
Also it is connected at the top of pond with pressure vacuum gauge.
Using said apparatus, the measuring method to power plant's water degasification hydrogen conductivity is as follows：
1) water intaking valve, outlet valve are opened, the sample water with malleation circulates pond from water intaking valve, full of after flow cell from going out
Water valve flows out；
2) water intaking valve, outlet valve are closed, extraction valve is opened, starts vavuum pump；Sample is monitored with the conductivity electrode in flow cell
The conductivity value of water, absolute pressure is monitored with pressure vacuum gauge；
3) as pressure is reduced, CO2Precipitation, conductivity value can decline；When pressure is minimized, and when maintaining a period of time,
Conductivity value is also minimized, and stable holding certain numerical value；The conductivity value and temperature value of record now, are exactly Current Temperatures
Under degassing electrical conductivity；
4) after measurement is finished, extraction valve is closed, vavuum pump is closed, water intaking valve, outlet valve are opened, and into sample water, and pass through one
The section time carrys out the sample that substitution measurement is crossed, and then starts once new measurement.
The present invention, with the closed flow cell imported and exported, after full of sample, is carried out using one using vavuum pump
Vacuumize, reach after expected vacuum, the CO dissolved in water2Gas will thus be realized because solubility declines and separates out
CO in water2Removal, reach elimination CO2The interference measured hydrogen conductivity.
Brief description of the drawings
Fig. 1, the structural representation of the measurement apparatus of power plant's water degasification hydrogen conductivity.
1 flow cell, 2 vavuum pumps, 3 pressure vacuum gauges, 4 conductivity electrodes, 5 water intaking valves, 6 outlet valves, 7 extraction valves.
Embodiment
The measurement apparatus of power plant's water degasification hydrogen conductivity, includes the flow cell for being provided with conductivity electrode, the flow cell
It is connected by pipeline with water intaking valve, top is connected with extraction valve, vavuum pump successively by pipeline, the bottom or side of the flow cell
Wall bottom is connected by pipeline with draining valve, is also connected at the top of the flow cell with pressure vacuum gauge.
Using said apparatus, the CO gone in water removal2, measure water degassing electrical conductivity method it is as follows：
1) water intaking valve, outlet valve are opened, the sample water with malleation circulates pond from water intaking valve, full of after flow cell from water outlet
Valve flows out；
2) water intaking valve, outlet valve are closed, extraction valve is opened, starts vavuum pump；
3) now, fraction water can be by vacuum pumped, and the pressure in flow cell can be more and more lower, until vacuum pressure reaches very
The limit of empty pump.Then a period of time is maintained.
4) in flow cell during pressure reduction, the CO dissolved in water2Gas can be reduced due to pressure, molten in water
Xie Du declines and separated out, and is maintaining a period of time of final vacuum, most CO2It can be precipitated.
5) conductivity value of sample water is monitored with the conductivity electrode in flow cell, absolute pressure is monitored with pressure vacuum gauge
Power.As pressure is reduced, CO2Precipitation, conductivity value can decline.
6) when pressure is down to 40KPa, and when maintaining a period of time, conductivity value also can be near minimum, and stable keeps one
Fixed number value.The conductivity value and temperature value of record now, are exactly the degassing electrical conductivity under Current Temperatures.This time measurement is finished.Certain
The hydrogen conductivity of individual power plant condensate is 0.16 ~ 0.18 μ s/cm, after degassing, in 0.06 ~ 0.09 μ s/cm.
After measurement is finished, extraction valve is closed, and vavuum pump is closed, and water intaking valve, outlet valve are opened, and into sample water, and are passed through
A period of time carrys out the sample that substitution measurement is crossed.Then new measurement is started once.
Claims (2)
1. a kind of measurement apparatus of power plant's water degasification hydrogen conductivity, it is characterised in that include the circulation for being provided with conductivity electrode
Pond, the flow cell is connected by pipeline with water intaking valve, and top is connected with extraction valve, vavuum pump successively by pipeline, the stream
The bottom in logical pond or lower sidewall are connected by pipeline with draining valve, are also connected at the top of the flow cell with pressure vacuum gauge.
2. measuring method of the measurement apparatus to power plant's water degasification hydrogen conductivity described in usage right requirement 1, it is characterised in that including
Following steps：
1) water intaking valve, outlet valve are opened, the sample water with malleation circulates pond from water intaking valve, full of after flow cell from water outlet
Valve flows out；
2) water intaking valve, outlet valve are closed, extraction valve is opened, starts vavuum pump；Sample is monitored with the conductivity electrode in flow cell
The conductivity value of water, absolute pressure is monitored with pressure vacuum gauge；
3) as pressure is reduced, CO2Precipitation, conductivity value can decline；When pressure is minimized, and when maintaining a period of time, electricity
Conductivity value is also minimized, and stable holding certain numerical value；Record conductivity value and temperature value now, under being exactly Current Temperatures
Degassing electrical conductivity；
4）After measurement is finished, extraction valve is closed, vavuum pump is closed, water intaking valve, outlet valve are opened, and into sample water, and pass through one
The section time carrys out the sample that substitution measurement is crossed, and then starts once new measurement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710049444.8A CN107064232A (en) | 2017-01-23 | 2017-01-23 | The measuring method and device of a kind of power plant's water degasification hydrogen conductivity |
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| CN201710049444.8A CN107064232A (en) | 2017-01-23 | 2017-01-23 | The measuring method and device of a kind of power plant's water degasification hydrogen conductivity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553895A (en) * | 2019-10-22 | 2019-12-10 | 南京润驰工程技术有限公司 | Carbon removal conductance measuring device and system |
| CN110749778A (en) * | 2019-10-21 | 2020-02-04 | 马鞍山钢铁股份有限公司 | On-line measuring method and measuring device for pure water degassing hydrogen conductivity |
| CN115902004A (en) * | 2022-11-08 | 2023-04-04 | 中科特肯(山东)智能科技有限公司 | Measuring device and measuring method for conductivity of degassed hydrogen |
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| CN204882440U (en) * | 2015-06-15 | 2015-12-16 | 中广核工程有限公司 | Degasification hydrogen conductivity measuring device |
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2017
- 2017-01-23 CN CN201710049444.8A patent/CN107064232A/en active Pending
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|---|---|---|---|---|
| JPH08226864A (en) * | 1995-02-22 | 1996-09-03 | Mitsubishi Heavy Ind Ltd | Apparatus for monitoring leak of salt water of condenser |
| CN2819058Y (en) * | 2005-08-12 | 2006-09-20 | 北京市中科天一环境技术有限公司 | Vacuum oxygen remover of water in boiler |
| CN101713679A (en) * | 2009-11-13 | 2010-05-26 | 黑龙江省水利科学研究院 | Device for monitoring quantity and quality of leakage water |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110749778A (en) * | 2019-10-21 | 2020-02-04 | 马鞍山钢铁股份有限公司 | On-line measuring method and measuring device for pure water degassing hydrogen conductivity |
| CN110553895A (en) * | 2019-10-22 | 2019-12-10 | 南京润驰工程技术有限公司 | Carbon removal conductance measuring device and system |
| CN115902004A (en) * | 2022-11-08 | 2023-04-04 | 中科特肯(山东)智能科技有限公司 | Measuring device and measuring method for conductivity of degassed hydrogen |
| CN115902004B (en) * | 2022-11-08 | 2023-08-18 | 中科特肯(山东)智能科技有限公司 | Measurement device and measurement method for conductivity of degassed hydrogen |
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Application publication date: 20170818 |