CN113109399A - Method and system for detecting organic matter content of water vapor sample of steam power equipment - Google Patents
Method and system for detecting organic matter content of water vapor sample of steam power equipment Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 239000005416 organic matter Substances 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title abstract description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 145
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 74
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 72
- 230000003647 oxidation Effects 0.000 claims abstract description 47
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 47
- 230000008929 regeneration Effects 0.000 claims abstract description 36
- 238000011069 regeneration method Methods 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000005349 anion exchange Methods 0.000 claims abstract description 20
- 238000005341 cation exchange Methods 0.000 claims abstract description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 18
- 239000007789 gas Substances 0.000 claims description 18
- 229910052739 hydrogen Inorganic materials 0.000 claims description 18
- 239000001257 hydrogen Substances 0.000 claims description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 150000001450 anions Chemical class 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 6
- 150000001768 cations Chemical class 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 15
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 description 11
- -1 carbon ion Chemical class 0.000 description 4
- 229910001410 inorganic ion Inorganic materials 0.000 description 4
- 125000005842 heteroatom Chemical group 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001172 regenerating effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Chemical group 0.000 description 1
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/18—Water
- G01N33/1826—Organic contamination in water
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N33/1826—Organic contamination in water
- G01N33/1846—Total carbon analysis
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Abstract
The invention belongs to the technical field of water quality detection, and relates to a method and a system for detecting the organic matter content of a water vapor sample of steam power equipment, wherein a first conductivity detector is respectively communicated with a second conductivity detector, an electric automatic regeneration anion exchange system, a first carbon dioxide collecting system and a second oxidation unit after passing through the electric automatic regeneration cation exchange system; the second conductivity detector is communicated with the first oxidation unit and the third conductivity detector in sequence; the electric automatic regeneration anion exchange system is respectively communicated with the first carbon dioxide collecting system and the second carbon dioxide collecting system; the first carbon dioxide collecting system is communicated with the fourth conductivity detector; the second carbon dioxide collection system is respectively communicated with the fifth conductivity detector and the second oxidation unit. The method measures the contents of various carbon indexes and the contents of various conductivity key indexes, and obtains pure water, thereby being environment-friendly, energy-saving and high in safety factor; long-period continuous operation and simple and convenient maintenance.
Description
Technical Field
The invention belongs to the technical field of water quality detection, and relates to a method and a system for detecting the organic matter content of a water vapor sample of steam power equipment.
Background
Organic pollutants in a water vapor system of steam power equipment can be decomposed under the condition of high temperature and high pressure of a boiler, the carbon dioxide, low molecular organic acid and corrosive anions generated by decomposition cause the conductivity of hydrogen vapor to be increased, if monitoring means are lacked for a long time, the corrosive anions generated by decomposition cause thermal equipment to be corroded, even severe accidents of pipe explosion of the boiler and blade fracture of a steam turbine are caused in severe cases, and the safety production of a unit is seriously threatened.
The traditional main index for monitoring the organic matters in the water is TOC (total organic carbon), the index can only reflect the carbon content in the organic pollutants, and cannot reflect the content of corrosive heteroatoms such as chlorine, sulfur and the like generated by the decomposition of the organic pollutants which are more concerned in the power industry, so that relevant standards such as GB/T12145-2016 and DL/T1358-2014 specify and monitor TOCi (total organic carbon ion) of a water vapor system, the index reflects the total amount of carbon dioxide and the corrosive heteroatoms generated after the decomposition of the organic matters, and the index better meets the requirements of the water vapor quality supervision of the power system relative to the TOC index. However, the TOCi index cannot distinguish between the carbon content and the heteroatom content resulting from the decomposition of organic matter.
In addition, key indexes such as conductivity, hydrogen conductivity, pH, ammonia content and the like of a water vapor system of a power plant and steam power equipment need to be monitored on line, each water sample needs multiple devices for water quality monitoring, the maintenance work of instruments is complicated, sampling pipelines are multiple, and the energy conservation, consumption reduction and economical operation are not facilitated.
Disclosure of Invention
Aiming at the technical problem of organic matter detection in the existing water vapor, the invention provides a method and a system for detecting the organic matter content of a water vapor sample of steam power equipment, wherein the whole set of system is adopted to detect the content of various carbon indexes (including inorganic carbon IC, total carbon TC, total organic carbon TOC, total organic carbon ions TOCi and the total inorganic ion amount TOCd generated by organic matter decomposition) of a water sample, and can detect key indexes of the water sample such as conductivity, hydrogen conductivity, degassed hydrogen conductivity, pH, ammonia content and the like; in addition, the system can automatically and continuously prepare pure water, does not need to be provided outside the system, is environment-friendly and energy-saving, and has high safety factor; long-period continuous operation and simple and convenient system maintenance.
In order to achieve the purpose, the invention adopts the technical scheme that:
a steam power equipment water vapor sample organic matter content detection system comprises a first conductivity detector, a second conductivity detector, a third conductivity detector, a fourth conductivity detector, a fifth conductivity detector, an electric automatic regeneration cation exchange system, an electric automatic regeneration anion exchange system, a first oxidation unit, a second oxidation unit, a first carbon dioxide collection system and a second carbon dioxide collection system;
the first conductivity detector is communicated with the second conductivity detector, the electric automatic regeneration anion exchange system, the first carbon dioxide collecting system and the second oxidation unit respectively after passing through the electric automatic regeneration cation exchange system; the second conductivity detector is communicated with the first oxidation unit and the third conductivity detector in sequence; the electric automatic regeneration anion exchange system is respectively communicated with the first carbon dioxide collecting system and the second carbon dioxide collecting system; the first carbon dioxide collection system is communicated with a fourth conductivity detector; the second carbon dioxide collection system is respectively communicated with the fifth conductivity detector and the second oxidation unit.
Further, the first carbon dioxide collecting system and the second carbon dioxide collecting system have the same structure and respectively comprise a shell and a gas-permeable membrane in the shell, the shell is divided into a gas phase collecting side and a water side by the gas-permeable membrane, and the electric automatic regeneration anion exchange system is respectively connected with the gas phase collecting side of the first carbon dioxide collecting system and the gas phase collecting side of the second carbon dioxide collecting system; the fifth conductivity detector is connected with the gas phase collection side of the second carbon dioxide collection system; the fourth conductivity detector is connected with the gas phase collection side of the first carbon dioxide collection system; the electric automatic regeneration cation exchange system is communicated with the water side of the first carbon dioxide collecting system; the second oxidation unit is in communication with a water side of a second carbon dioxide collection system.
Furthermore, the first oxidation unit and the second oxidation unit are both water flow built-in optical oxidation units.
A detection method of a steam power equipment water vapor sample organic matter content detection system comprises the following steps:
1) the water sample passes through a first conductivity detector to obtain a conductivity value, pH value and ammonia content of the water sample; removing cations in a water sample by an electric automatic regeneration cation exchange system to obtain a flow path a and a flow path b;
2) a flow path is continuously divided into a1Flow path and a2A flow path; a is1The flow path is discharged out of the system after passing through the second conductivity detector, the first oxidation unit and the third conductivity detector in sequence, and the hydrogen conductivity of the water sample and the TOCi content of the water sample are obtained; a is2The flow path removes anions in a water sample through an electric automatic regeneration anion exchange system to obtain pure water, and the pure water is divided into a21Flow path and a22A flow path;
3) b, dividing the water sample into b after adjusting the pH to about 21Flow path and b2Flow path b1A flow path through the water side exhaust system of the first carbon dioxide collection system; b2The flow path sequentially passes through the second oxidation unit and a water side discharge system of the second carbon dioxide collection system; a is21The flow path passes through the collection side of the first carbon dioxide collection system and the fourth conductance in sequenceThe detector obtains the IC content of the water sample and simultaneously obtains the degassed hydrogen conductivity of the water sample; a is22The flow path sequentially passes through the collecting side of the second carbon dioxide collecting system and the fifth conductivity detector to obtain the TC content of the water sample;
4) and obtaining the TOC content and the TOCd content in the water sample according to the TOCi content, the IC content and the TC content.
Further, in the step 4), TOC ═ TC-IC; TOCd-TOC.
Further, in the step 1), the flow ratio of the flow path a to the flow path b is 3: 2.
further, in the step 2), a1Flow path and a2The flow ratio of the flow path is 1: 2; a is21Flow path and a22The flow ratio of the flow path is 1: 1.
further, in the step 3), b flow path water sample adjustment is completed by adding phosphoric acid.
Further, in the step 3), b1Flow path and b2The flow ratio of the flow path is 1: 1.
further, in the step 3), the degassed hydrogen conductivity of the water sample is a difference value between the conductivity measured by the second conductivity detector and the conductivity measured by the fourth conductivity detector.
The invention has the beneficial effects that:
1. the water vapor sample organic matter content detection system and method provided by the invention can detect various carbon content indexes in a water vapor sample of steam power equipment, including IC (inorganic carbon) index content, TC (total carbon) index content, TOC (total organic carbon) index content, TOCi (total organic carbon ion) index content, TOCd (total inorganic ion amount generated by organic matter decomposition) index content, and key index contents such as conductivity, hydrogen conductivity, degassed hydrogen conductivity, pH, ammonia content and the like of a water sample.
2. According to the water vapor sample organic matter content detection system and method provided by the invention, the electric automatic regeneration cation exchange system and the electric automatic regeneration anion exchange system are adopted to remove anions and cations in a water sample, so that the system-used pure water can be prepared, deionized water is not required to be provided outside the system, resin replacement and regeneration are not required, the system can continuously and automatically operate, and meanwhile, the anion and cation resins are not required to be replaced or regenerated, so that the system can continuously operate for a long period.
3. The water vapor sample organic matter content detection system and method provided by the invention can be used for measuring total TOCd (total inorganic ions generated by water sample organic matter decomposition) and TOCi (total organic carbon ions) of water sample organic matter decomposition ions, and effectively preventing corrosive anions generated by organic matter decomposition from damaging thermodynamic equipment of a power system and steam power equipment.
4. The oxidation unit adopted by the invention is a water flow built-in optical oxidation unit, when the content of organic matters is within 3000 mu g/L, the oxidation efficiency is up to 99 percent, no oxidant is required to be added or high-temperature oxidation is adopted, the measurement process is environment-friendly and energy-saving, and the safety coefficient is high.
Drawings
FIG. 1 is a schematic diagram of a water vapor sample organic content system provided by the present invention;
wherein:
1-a first conductance detector; 2-a second conductance detector; 3-a third conductance detector; 4-a fourth conductance detector; 5-a fifth conductivity detector; 6-an electrically automatic regenerating cation exchange system; 7-an electrically automatic regenerating anion exchange system; 8-a first oxidation unit; 9-a second oxidation unit; 10-a first carbon dioxide collection system; 11-a second carbon dioxide collection system.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Examples
Referring to fig. 1, the system for detecting the organic content of a water vapor sample of a steam power plant provided by this embodiment includes a first conductivity detector 1, a second conductivity detector 2, a third conductivity detector 3, a fourth conductivity detector 4, a fifth conductivity detector 5, an electrically automatic regeneration cation exchange system 6, an electrically automatic regeneration anion exchange system 7, a first oxidation unit 8, a second oxidation unit 9, a first carbon dioxide collection system 10, and a second carbon dioxide collection system 11;
the first conductivity detector 1 is respectively communicated with the second conductivity detector 2, the automatic regeneration anion exchange system 7, the first carbon dioxide collecting system 10 and the second oxidation unit 9 after passing through the automatic regeneration cation exchange system 6; the second conductivity detector 2 is communicated with the first oxidation unit 8 and the third conductivity detector 3 in sequence; the electric automatic regeneration anion exchange system 7 is respectively communicated with a first carbon dioxide collecting system 10 and a second carbon dioxide collecting system 11; the first carbon dioxide collection system 10 is in communication with the fourth conductivity detector 4; the second carbon dioxide collection system 11 is in communication with the fifth conductivity detector 5 and the second oxidation unit 9, respectively.
In this embodiment, the first carbon dioxide collecting system 10 and the second carbon dioxide collecting system 11 have the same structure, and each of the first carbon dioxide collecting system and the second carbon dioxide collecting system comprises a housing and a gas permeable membrane in the housing, the gas permeable membrane divides the housing into a gas phase collecting side and a water side, and the electric automatic regeneration anion exchange system 7 is connected to the gas phase collecting side of the first carbon dioxide collecting system 10 and the gas phase collecting side of the second carbon dioxide collecting system 11 respectively; the fifth conductivity detector 5 is connected to the gas phase collection side of the second carbon dioxide collection system 11; the fourth conductivity detector 4 is connected to the gas phase collection side of the first carbon dioxide collection system 10; the electric automatic regeneration cation exchange system 6 is communicated with the water side of the first carbon dioxide collecting system 10; the second oxidation unit 9 is in communication with the water side of the second carbon dioxide collection system 11.
In this embodiment, the first oxidation unit 8 and the second oxidation unit 9 are both optical oxidation units with built-in water flow. The water flow enters the oxidation unit and then is divided into a plurality of transparent channels, the transparent channels are all positioned in the optical oxidation environment, and compared with a traditional external system, when organic matters are within 3000 mug/L, the oxidation efficiency can be improved from 50% -80% to 99%.
In the embodiment, the first conductivity detector 1, the second conductivity detector 2, the third conductivity detector 3, the fourth conductivity detector 4 and the fifth conductivity detector 5 are all micro-flow and micro-channel conductivity detectors, the electrodes can adopt 0.01 or 0.1 grade, and the detection range is 0.055-50 muS/cm. Compared with the traditional conductivity detector, the conductivity detector adopted by the invention has the advantages that the water sample flow required by the conductivity detector is only about one percent of that of the traditional detector, and various nonlinear temperature compensation curves are built in the conductivity detector, so that the conductivity detection requirements of a pure water system and an acid and alkali system can be completely met.
In this embodiment, the electric automatic regeneration cation exchange system 6 and the electric automatic regeneration anion exchange system 7 are electric automatic regeneration ion exchangers having proprietary intellectual property (patent No. 201320492800.0) and are of the TPRI-IC type.
The detection method of the system for detecting the organic matter content of the water vapor sample of the steam power equipment provided by the embodiment comprises the following steps:
1) a water sample passes through the first conductivity detector 1 at an L flow rate to obtain a conductivity value of the water sample; the water sample is removed by an electric automatic regeneration cation exchange system 6 to obtain cations which are then divided into a flow path a and a flow path b, wherein the flow rate of the flow path a is 3L/5, and the flow rate of the flow path b is 2L/5;
2) a flow path is continuously divided into a1Flow path and a2A flow path; a is1The flow rate of the flow path is L/5; a is2The flow rate of the flow path is 2L/5; a is1The flow path is discharged out of the system after passing through the second conductivity detector 2, the first oxidation unit 8 and the third conductivity detector 3 in sequence, and the TOCi content of the obtained water sample, the conductivity of the sample obtained after cation removal and the hydrogen conductivity of the water sample are obtained; a is2The flow path removes anions in a water sample through an electric automatic regeneration anion exchange system 7 to obtain pure water, and the pure water is divided into a21Flow path and a22A flow path; a is21Flow rate of flow path and a22The flow rates of the flow paths are all L/5;
3) b, dividing the water sample into b after adjusting the pH to about 21Flow path and b2Flow path b1Flow path and b2The flow rates of the flow paths are all L/5; b1The flow path passes through the first carbon dioxide collection system 10 water side exhaust system; b2The flow path sequentially passes through the second oxidation unit 9 and the water side discharge system of the second carbon dioxide collection system 11; a is21The flow path sequentially passes through the collecting side of the first carbon dioxide collecting system 10 and the fourth conductivity detector 4 to obtain the IC content of the water sample and simultaneously obtain the degassed hydrogen conductivity of the water sample; a is22The flow path passes through the second carbon dioxide collecting system in sequence11 and a fifth conductivity detector 5 to obtain the TC content of the water sample;
4) and obtaining the TOC and TOCd contents in the water sample according to the TOCi content, the IC content and the TC content. Specifically, TOC ═ TC-IC; TOCd-TOC.
In this embodiment, the b flow path water sample adjustment is completed by adding phosphoric acid, which is to convert all the carbonate (hydrogen) in the water sample into CO2。
In this embodiment, b is1Flow path into the water side of the first carbon dioxide collection system 10, b1CO in the flow path2Will enter a through the gas permeable membrane of the first carbon dioxide collection system 1021The pure water in the flow path, therefore, the value measured by the conductivity detector 4 can reflect the IC content (inorganic carbon, CO) of the water sample2And total amount of carbonate), b2The flow path enters the water side of a second carbon dioxide collecting system 11 after passing through a second oxidation unit 9, and the second oxidation unit 9 can be used for removing b2The organic matter of the flow path water sample is completely decomposed into CO2And inorganic ions, same principle, b2CO in flow path water samples2The gas-permeable membrane (originally contained in the water sample and generated by the decomposition of organic substances) passing through the second carbon dioxide collecting system 11 enters a22The value measured by the conductivity detector 5 in the pure water in the flow path reflects the TC content (total carbon) of the water sample.
In this embodiment, the conductivity of the water sample can be obtained by detecting the value by the first conductivity detector 1, the hydrogen conductivity of the water sample can be obtained by detecting the value by the second conductivity detector 2, and the TOCi content can be further calculated and obtained by processing according to the conductivity difference detected by the third conductivity detector 3 and the second conductivity detector 2 by a conventional method; the difference value of the electric conductivity measured by the second electric conductivity detector 2 and the electric conductivity measured by the fourth electric conductivity detector 4 can be calculated to obtain the degassed hydrogen electric conductivity of the water sample; and (4) according to the detection value of the fifth conductivity detector 5, processing by a conventional method and further calculating to obtain the TC (total carbon index) content of the water sample.
In this embodiment, the degassed hydrogen conductivity index of the water sample is a difference between the conductivity value measured by the second conductivity detector 2 and the conductivity value measured by the fourth conductivity detector 4.
For the water sample of the pure water ammonia adding system, the detection system provided by this embodiment can also be selectively installed with a simulation calculation system after the first conductivity detector 1 to calculate the pH value and ammonia content of the water sample.
Claims (10)
1. The utility model provides a steam power equipment steam sample organic matter content detecting system which characterized in that: the steam power equipment water vapor sample organic matter content detection system comprises a first conductivity detector (1), a second conductivity detector (2), a third conductivity detector (3), a fourth conductivity detector (4), a fifth conductivity detector (5), an electric automatic regeneration cation exchange system (6), an electric automatic regeneration anion exchange system (7), a first oxidation unit (8), a second oxidation unit (9), a first carbon dioxide collection system (10) and a second carbon dioxide collection system (11);
the first conductivity detector (1) is respectively communicated with the second conductivity detector (2), the electric automatic regeneration anion exchange system (7), the first carbon dioxide collecting system (10) and the second oxidation unit (9) after passing through the electric automatic regeneration cation exchange system (6); the second conductivity detector (2) is communicated with the first oxidation unit (8) and the third conductivity detector (3) in sequence; the electric automatic regeneration anion exchange system (7) is respectively communicated with a first carbon dioxide collecting system (10) and a second carbon dioxide collecting system (11); the first carbon dioxide collection system (10) is in communication with a fourth conductivity detector (4); the second carbon dioxide collecting system (11) is respectively communicated with the fifth conductivity detector (5) and the second oxidation unit (9).
2. The steam power plant water vapor sample organic content detection system of claim 1, wherein: the first carbon dioxide collecting system (10) and the second carbon dioxide collecting system (11) are identical in structure and respectively comprise a shell and a gas-permeable membrane in the shell, the gas-permeable membrane divides the shell into a gas phase collecting side and a water side, and the electric automatic regeneration anion exchange system (7) is respectively connected with the gas phase collecting side of the first carbon dioxide collecting system (10) and the gas phase collecting side of the second carbon dioxide collecting system (11); the fifth conductivity detector (5) is connected to the gas phase collection side of the second carbon dioxide collection system (11); the fourth conductivity detector (4) is connected to the gas phase collection side of the first carbon dioxide collection system (10); the electric automatic regeneration cation exchange system (6) is communicated with the water side of the first carbon dioxide collection system (10); the second oxidation unit (9) is in communication with the water side of a second carbon dioxide collection system (11).
3. The steam power plant water vapor sample organic content detection system of claim 2, wherein: the first oxidation unit (8) and the second oxidation unit (9) are both optical oxidation units with built-in water flow.
4. A detection method of the steam power equipment water vapor sample organic matter content detection system based on claim 3, characterized by comprising the following steps: the detection method comprises the following steps:
1) a water sample passes through a first conductivity detector (1) to obtain a conductivity value, pH value and ammonia content of the water sample; and is divided into a flow path a and a flow path b after cations in a water sample are removed by an electric automatic regeneration cation exchange system (6);
2) a flow path is continuously divided into a1Flow path and a2A flow path; a is1The flow path is discharged out of the system after passing through the second conductivity detector (2), the first oxidation unit (8) and the third conductivity detector (3) in sequence to obtain the hydrogen conductivity of the water sample and the TOCi content of the water sample; a is2The flow path removes anions in a water sample through an electric automatic regeneration anion exchange system (7) to obtain pure water, and the pure water is divided into a21Flow path and a22A flow path;
3) b, dividing the water sample into b after adjusting the pH to about 21Flow path and b2Flow path b1A water side exhaust system with a flow path passing through the first carbon dioxide collection system (10); b2The flow path sequentially passes through a second oxidation unit (9) and a water side discharge system of a second carbon dioxide collection system (11); a is21The flow path sequentially passes through the collection side of the first carbon dioxide collection system (10) and the fourth conductivity detector (4) to obtain the IC content of the water sample and obtain the degassed hydrogen conductivity of the water sample; a is22The flow path sequentially passes through the collection side of the second carbon dioxide collection system (11) and the fifth conductivity detector (5) to obtain the TC content of the water sample;
4) and obtaining the TOC content and the TOCd content in the water sample according to the TOCi content, the IC content and the TC content.
5. The detection method according to claim 4, characterized in that: in the step 4), TOC is TC-IC; TOCd-TOC.
6. The detection method according to claim 4, characterized in that: in the step 1), the flow ratio of the flow path a to the flow path b is 3: 2.
7. the detection method according to claim 4, characterized in that: in the step 2), a1Flow path and a2The flow ratio of the flow path is 1: 2; a is21Flow path and a22The flow ratio of the flow path is 1: 1.
8. the detection method according to claim 4, characterized in that: in the step 3), the b flow path water sample adjustment is completed by adding phosphoric acid.
9. The detection method according to claim 9, characterized in that: in said step 3), b1Flow path and b2The flow ratio of the flow path is 1: 1.
10. the detection method according to claim 9, characterized in that: in the step 3), the degassed hydrogen conductivity of the water sample is the difference value between the conductivity measured by the second conductivity detector (2) and the conductivity measured by the fourth conductivity detector (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110500727.6A CN113109399B (en) | 2021-05-08 | 2021-05-08 | Method and system for detecting organic matter content of steam sample of steam power equipment |
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| CN202110500727.6A CN113109399B (en) | 2021-05-08 | 2021-05-08 | Method and system for detecting organic matter content of steam sample of steam power equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114813850A (en) * | 2022-04-29 | 2022-07-29 | 华能国际电力股份有限公司 | Water quality sodium ion detection and analysis system and use method |
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