CN110208328A - A kind of Test of accuracy system and method for the online pH table of power plant water-steam system - Google Patents
A kind of Test of accuracy system and method for the online pH table of power plant water-steam system Download PDFInfo
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- CN110208328A CN110208328A CN201910496039.XA CN201910496039A CN110208328A CN 110208328 A CN110208328 A CN 110208328A CN 201910496039 A CN201910496039 A CN 201910496039A CN 110208328 A CN110208328 A CN 110208328A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005259 measurement Methods 0.000 claims abstract description 16
- 238000013480 data collection Methods 0.000 claims abstract description 14
- 238000007689 inspection Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 238000012545 processing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- G—PHYSICS
- 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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- General Health & Medical Sciences (AREA)
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Abstract
A kind of Test of accuracy system and method for the online pH table of power plant water-steam system, the system include and are detected the standard conductivity table that online pH table is connected in parallel, the Data collection and precessing system connecting with standard conductivity table output end；The method of inspection are as follows: 1) by standard conductivity table nearby be detected online pH table and be connected in parallel, water sample is the water sample being detected when online pH table normally measures, by the conductivity measurements of Data collection and precessing system acquisition standard conductivity table；2) conductivity measurements of standard conductivity table are converted to pH value by Data collection and precessing system；3) Data collection and precessing system according to the pH value after conversion and is detected the indicating value of online pH table, calculates the error for being detected online pH table, if error is exceeded, then carries out on-line calibration to being detected online pH table；The present invention does not need to generate standard water sample using low conductivity pH standard water sample preparation facilities, does not need disassembly yet and is detected online pH table, entire checkout procedure is simple, convenient, fast.
Description
Technical field
The invention belongs to power plant water-steam system on-line chemical monitoring instruments to examine field, be related to a kind of power plant water-steam system and exist
The Test of accuracy method and system of line pH table.
Background technique
Online pH table is the key chemical instrument in power plant monitoring instrument for steam water system in power plant, it is ensured that online pH table measurement is quasi-
Really, and its measured value is controlled in acceptability limit, can effectively prevent the etching problem of heat power equipment.The online pH table of water-steam system
Measurement accuracy is not only influenced by online factor (streaming potential, earth-return etc.), and also by pure water factor, (liquid junction potential, temperature are mended
Repay) it influences, so DL/T 677-2018 " power plant on-line chemical monitoring instrument inspection procedure " regulation is for measurement water-steam system electricity
Conductivity value is not more than the online pH table of 100 μ S/cm, should use the online method of inspection.Currently, the online accuracy inspection of online pH table
Proved recipe method is to generate standard water sample method using low conductivity pH standard water sample preparation facilities, needs to dismantle and is detected online pH table.
Summary of the invention
The present invention provides a kind of simple and reliable online pH table Test of accuracy system and method for power plant water-steam system,
It does not need to generate standard water sample using low conductivity pH standard water sample preparation facilities, does not need disassembly yet and be detected online pH table.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of Test of accuracy system of the online pH table of power plant water-steam system, including be connected in parallel with online pH table is detected
Standard conductivity table 1, the Data collection and precessing system 2 being connect with 1 output end of standard conductivity table.
The method of inspection of the Test of accuracy system of water-steam system online pH table in power plant of the present invention, including it is following
Step:
1) by standard conductivity table 1 nearby be detected online pH table and be connected in parallel, water sample is to be detected online pH table normally to survey
Water sample when amount, standard conductivity table 1 and is detected online pH table respectively while measuring water sample conductivity and pH value, is acquired by data
The conductivity measurements of standard conductivity table 1 are acquired with processing system 2；
2) Data collection and precessing system 2 converts the conductivity measurements of standard conductivity table 1, principle are as follows: hair
The water quality purity of Power Plant Water Vapor system is very high, and containing a small amount of ammonia, low concentration pure water containing ammonia can be calculated by thermodynamic data
PH value and conductivity between theory of correspondences value, the conductivity measurements of standard conductivity table 1 directly can be converted into pH
Value；
3) Data collection and precessing system 2 according to the pH value after conversion and is detected the indicating value of online pH table, calculates tested
The complete machine error of indication of online pH table, according to online pH table specification is detected, is carried out if error is exceeded to online pH table is detected
Line calibration.
The invention has the following advantages over the prior art:
(1) it does not need to generate standard water sample using low conductivity pH standard water sample preparation facilities, saves waiting standard water sample
The time (30min or more) of rinse-system.
(2) it does not need disassembly and is detected online pH table, do not influence tested pH table in the normal water sample function of the measurement of inspection period,
Entire checkout procedure is simple, convenient, fast.
Detailed description of the invention
Fig. 1 is checking system of the present invention and method of inspection schematic diagram.
Wherein, 1 is standard conductivity table, and 2 be Data collection and precessing system.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawing:
With reference to Fig. 1, water-steam system online pH table Test of accuracy system in power plant of the present invention includes: standard conductance
Rate table 1 is connected in parallel with online pH table is detected, and the output end of standard conductivity table 1 is connected with Data collection and precessing system 2.
Water-steam system online pH table Test of accuracy method in power plant of the present invention the following steps are included:
1) by standard conductivity table 1 nearby be detected online pH table and be connected in parallel, water sample is to be detected online pH table normally to survey
Water sample when amount, standard conductivity table 1 and is detected online pH table respectively while measuring water sample conductivity and pH value.It is acquired by data
The conductivity measurements of standard conductivity table 1 are acquired with processing system 2.
2) Data collection and precessing system 2 converts the conductivity measurements of standard conductivity table 1, principle are as follows: hair
The water quality purity of Power Plant Water Vapor system is very high, and containing a small amount of ammonia, low concentration pure water containing ammonia can be calculated by thermodynamic data
PH value and conductivity between theory of correspondences value, the conductivity measurements of standard conductivity table directly can be converted into pH
Value.
3) Data collection and precessing system 2 according to the pH value after conversion and is detected the indicating value of online pH table, calculates tested
The complete machine error of indication of online pH table, according to online pH table specification is detected, is carried out if error is exceeded to online pH table is detected
Line calibration.
Final purpose of the present invention is that a kind of simple and reliable water-steam system is provided for Chemical Instruments in Electric Power Plants operation maintenance personnel
Online pH table Test of accuracy method and system, only use the very short time, can be achieved with the online pH table accuracy of water-steam system
In X -ray inspection X, the measurement accuracy of online pH table is improved, for preventing water-steam system metal erosion, guaranteeing that generating set passes through safely
Ji operation is of great significance.
Claims (2)
1. a kind of Test of accuracy system of the online pH table of power plant water-steam system, it is characterised in that: including be detected online pH
The standard conductivity table (1) that table is connected in parallel, the Data collection and precessing system being connect with standard conductivity table (1) output end
(2)。
2. the method for inspection of the Test of accuracy system of water-steam system online pH table in power plant described in claim 1, feature
It is: the following steps are included:
1) by standard conductivity table (1) nearby be detected online pH table and be connected in parallel, water sample is to be detected online pH table normally to measure
When water sample, standard conductivity table (1) and be detected online pH table respectively while measuring water sample conductivity and pH value, acquired by data
With the conductivity measurements of processing system (2) acquisition standard conductivity table (1)；
2) Data collection and precessing system (2) converts the conductivity measurements of standard conductivity table (1), by standard conductance
The conductivity measurements of rate table (1) are converted to pH value；
3) Data collection and precessing system (2) according to the pH value after conversion and is detected the indicating value of online pH table, calculates and is detected
The complete machine error of indication of line pH table, according to online pH table specification is detected, carries out online if error is exceeded to online pH table is detected
Calibration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496039.XA CN110208328A (en) | 2019-06-10 | 2019-06-10 | A kind of Test of accuracy system and method for the online pH table of power plant water-steam system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910496039.XA CN110208328A (en) | 2019-06-10 | 2019-06-10 | A kind of Test of accuracy system and method for the online pH table of power plant water-steam system |
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| Publication Number | Publication Date |
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| CN110208328A true CN110208328A (en) | 2019-09-06 |
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| CN201910496039.XA Pending CN110208328A (en) | 2019-06-10 | 2019-06-10 | A kind of Test of accuracy system and method for the online pH table of power plant water-steam system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060561A (en) * | 2019-12-31 | 2020-04-24 | 陕西中良智能科技有限公司 | Device, method and system for monitoring ph value of liquid |
| CN112798758A (en) * | 2021-03-16 | 2021-05-14 | 西安热工研究院有限公司 | Intelligent checking and maintaining system and method for online chemical instrument |
| CN115420789A (en) * | 2022-08-29 | 2022-12-02 | 大唐秦岭发电有限公司 | Power plant low-conductivity water pH electrode failure detection system and method |
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| CN201034966Y (en) * | 2007-04-13 | 2008-03-12 | 西安热工研究院有限公司 | Testing device of mobile on-line pH measuring instrument |
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| CN206624728U (en) * | 2017-03-23 | 2017-11-10 | 长安石门发电有限公司 | A kind of electric generator inner cooling water treatment system |
| CN207730753U (en) * | 2018-01-31 | 2018-08-14 | 华能陕西秦岭发电有限公司 | One kind being used for power plant 2 calibration systems of online pH tables |
| CN210894193U (en) * | 2019-06-10 | 2020-06-30 | 西安热工研究院有限公司 | Accuracy inspection system of online pH table of power plant steam system |
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2019
- 2019-06-10 CN CN201910496039.XA patent/CN110208328A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201034966Y (en) * | 2007-04-13 | 2008-03-12 | 西安热工研究院有限公司 | Testing device of mobile on-line pH measuring instrument |
| CN201035099Y (en) * | 2007-04-13 | 2008-03-12 | 西安热工研究院有限公司 | Mobile on-line electric conductivity measuring instrument testing device |
| CN206624728U (en) * | 2017-03-23 | 2017-11-10 | 长安石门发电有限公司 | A kind of electric generator inner cooling water treatment system |
| CN207730753U (en) * | 2018-01-31 | 2018-08-14 | 华能陕西秦岭发电有限公司 | One kind being used for power plant 2 calibration systems of online pH tables |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111060561A (en) * | 2019-12-31 | 2020-04-24 | 陕西中良智能科技有限公司 | Device, method and system for monitoring ph value of liquid |
| CN112798758A (en) * | 2021-03-16 | 2021-05-14 | 西安热工研究院有限公司 | Intelligent checking and maintaining system and method for online chemical instrument |
| WO2022193562A1 (en) * | 2021-03-16 | 2022-09-22 | 西安热工研究院有限公司 | Intelligent verification and maintenance system and method for online chemical instruments |
| CN115420789A (en) * | 2022-08-29 | 2022-12-02 | 大唐秦岭发电有限公司 | Power plant low-conductivity water pH electrode failure detection system and method |
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