CN113109399B - Method and system for detecting organic matter content of steam sample of steam power equipment - Google Patents
Method and system for detecting organic matter content of steam sample of steam power equipment Download PDFInfo
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- 239000005416 organic matter Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 144
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 117
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 72
- 229910002092 carbon dioxide Inorganic materials 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 33
- 238000011069 regeneration method Methods 0.000 claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 24
- 238000005349 anion exchange Methods 0.000 claims abstract description 20
- 238000005341 cation exchange Methods 0.000 claims abstract description 16
- 239000007789 gas Substances 0.000 claims description 22
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims description 17
- 239000001257 hydrogen Substances 0.000 claims description 17
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 12
- 150000001450 anions Chemical class 0.000 claims description 8
- 150000001768 cations 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
- 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
- 230000001105 regulatory effect Effects 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
- 238000000354 decomposition reaction Methods 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- -1 carbon ions Chemical class 0.000 description 4
- 229910001410 inorganic ion Inorganic materials 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 125000005842 heteroatom Chemical group 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
- 238000007872 degassing Methods 0.000 description 2
- 238000004134 energy conservation Methods 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
- 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
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 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
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012423 maintenance 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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- 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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- G—PHYSICS
- 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
- G01N33/18—Water
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- G—PHYSICS
- 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
- G01N33/18—Water
- G01N33/182—Specific anions in water
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- G—PHYSICS
- 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
- G01N33/18—Water
- G01N33/1826—Organic contamination in water
-
- G—PHYSICS
- 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
- G01N33/18—Water
- 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 an electric automatic regeneration cation exchange system; the second conductivity detector is sequentially communicated with the first oxidation unit and the third conductivity detector; 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 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 content of various carbon indexes and the content of various conductivity key indexes, obtains pure water, is environment-friendly and energy-saving, and has high safety coefficient; the long-period continuous operation is simple and convenient to maintain.
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 steam system of the steam power equipment can be decomposed under the conditions of high temperature and high pressure of a boiler, carbon dioxide, low molecular organic acid and corrosive anions generated by decomposition lead to the increase of steam hydrogen conductivity, if a monitoring means is lacking for a long time, the corrosive anions generated by decomposition can cause corrosion of thermal equipment, and even lead to severe accidents of pipe explosion of the boiler and breakage of blades of a turbine when serious, thereby seriously threatening the safe production of units.
The traditional main index for monitoring the organic matters in water is TOC (total organic carbon), the index can only reflect the carbon content in the organic pollutants and can not reflect the content of corrosive heteroatoms such as chlorine, sulfur and the like generated by decomposing the organic pollutants which are more concerned by the power industry, therefore, related standards such as GB/T12145-2016 and DL/T1358-2014 prescribe TOCi (total organic carbon ions) for monitoring a water vapor system, the index reflects the total amount of carbon dioxide and corrosive heteroatoms generated after the organic matters are decomposed, and the index is more in accordance with the requirements of 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 produced by the decomposition of organic matter.
In addition, the water vapor system of the power plant and the steam power equipment is also used for on-line monitoring key indexes such as conductivity, hydrogen conductivity, pH, ammonia content and the like, and each water sample needs a plurality of equipment for water quality monitoring, so that the instrument maintenance work is complicated, the sampling pipelines are numerous, and the energy conservation, consumption reduction and economic operation are not facilitated.
Disclosure of Invention
Aiming at the technical problems of detection of organic matters 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 can be used for detecting the content of various carbon indexes (including inorganic carbon IC, total carbon TC, total organic carbon TOC, total organic carbon ions TOCi, total inorganic ions TOCd generated by decomposition of organic matters) of a water sample, and can also be used for detecting key indexes such as conductivity, hydrogen conductivity, degassing hydrogen conductivity, pH, ammonia content and the like of the water sample; in addition, the system can automatically and continuously prepare pure water without being provided outside the system, is environment-friendly and energy-saving, and has high safety coefficient; the system runs continuously for a long period, and is simple and convenient to maintain.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the system for detecting the organic matter content of the vapor sample of the steam power equipment 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 collecting system and a second carbon dioxide collecting 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 after passing through the electric automatic regeneration cation exchange system; the second conductivity detector is sequentially communicated with the first oxidation unit and the third conductivity detector; 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 comprise a shell and a gas permeable membrane in one 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 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 the water side of the 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 is subjected to a first conductivity detector to obtain a water sample conductivity value, a water sample pH value and an ammonia content; removing cations in the water sample by an electric automatic regeneration cation exchange system, and dividing the water sample into an a flow path and a b flow path;
2) The flow path a is continuously divided into a 1 Flow path and a 2 A flow path; a, a 1 The flow path sequentially passes through the second conductivity detector, the first oxidation unit and the third conductivity detector and then is discharged out of the system, so that the hydrogen conductivity of the water sample and the TOCi content of the water sample are obtained; a, a 2 The flow path removes anions in the water sample through an electric automatic regeneration anion exchange system to obtain pure water, and is divided into a 21 Flow path and a 22 A flow path;
3) b, after the pH value of the water sample in the flow path is regulated to about 2, dividing the water sample into b 1 Flow path and b 2 Flow path b 1 The flow path flows through the water side discharge system of the first carbon dioxide collection system; b 2 The flow path sequentially passes through the second oxidation unit and the water side discharge system of the second carbon dioxide collecting system; a, a 21 The flow path sequentially passes through the collecting side of the first carbon dioxide collecting system and the fourth conductivity detector to obtain the IC content of the water sample, and meanwhile, the deaerated hydrogen conductivity of the water sample is obtained; a, a 22 The 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 TOC content and 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=TOCi-TOC.
Further, in the step 1), the flow ratio of the a flow path to the b flow path is 3:2.
further, in the step 2), a 1 Flow path and a 2 The flow ratio of the flow path was 1:2; a, a 21 Flow path and a 22 Flow pathThe flow ratio of (2) 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), b 1 Flow path and b 2 The flow ratio of the flow path was 1:1.
further, in the step 3), the degassed hydrogen conductivity of the water sample is the difference between the conductivity measured by the second conductivity detector and the conductivity measured by the fourth conductivity detector.
The beneficial effects of the invention are as follows:
1. the system and the method for detecting the organic matter content of the water vapor sample can detect various carbon content indexes in the water vapor sample of the 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, degassing hydrogen conductivity, pH, ammonia content and the like of a water sample, and the detection system has the advantages of high intensification and intelligent degree, environmental protection, energy conservation, convenient operation and low cost.
2. The system and the method for detecting the organic matter content of the water vapor sample can prepare the self-used pure water of the system by adopting the electric automatic regeneration cation exchange system and the electric automatic regeneration anion exchange system to remove anions and cations in the water sample, the deionized water is not required to be provided outside the system, the resin is not required to be replaced or regenerated, the system can continuously and automatically operate, and meanwhile, the anion and cation resin is not required to be replaced or regenerated, and the system can continuously operate for a long period.
3. The system and the method for detecting the organic matter content of the water vapor sample can be used for detecting the total amount TOCd (total inorganic ions generated by decomposing organic matters in the water sample) and TOCi (total organic carbon ions) of the organic matters in the water sample, and effectively prevent the harm of corrosive anions generated by decomposing the organic matters to the thermodynamic equipment of an electric power system and steam power equipment.
4. The oxidation unit adopted by the invention is a water flow built-in optical oxidation unit, the oxidation efficiency is as high as 99% when the organic matter content is within 3000 mug/L, 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 an organic matter content system of a water vapor sample provided by the invention;
wherein:
1-a first conductivity detector; 2-a second conductivity detector; 3-a third conductivity detector; 4-a fourth conductivity detector; 5-a fifth conductivity detector; 6-an electric automatic regeneration cation exchange system; 7-an electrically automatic regeneration 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 invention will now be described in detail with reference to the drawings and examples.
Examples
Referring to fig. 1, the steam power plant water vapor sample organic matter content detection system provided in 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 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 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 sequentially communicated with the first oxidation unit 8 and the third conductivity detector 3; the electric automatic regeneration anion exchange system 7 is respectively communicated with the first carbon dioxide collecting system 10 and the 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 10 and the second carbon dioxide collecting system 11 comprises a housing and a gas permeable membrane in one of the housings, wherein the gas permeable membrane divides the housing into a gas phase collecting side and a water side, and the electro-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 electro-automatically regenerating cation exchange system 6 is in communication 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 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 is shunted to a plurality of transparent channels after entering the oxidation unit, the transparent channels are all positioned in the optical oxidation environment, and when the organic matters are within 3000 mug/L compared with the traditional external system, the oxidation efficiency can be improved from 50% -80% to 99%.
In this 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, and the electrodes can be 0.01 or 0.1 level, and the detection range is 0.055-50 μs/cm. Compared with the traditional conductivity detector, 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-base system can be completely met.
In this embodiment, the electro-automatic regenerating cation exchange system 6 and the electro-automatic regenerating anion exchange system 7 are electro-automatic regenerating ion exchangers with independent intellectual property rights (patent number 201320492800.0) and are of the type TPRI-IC.
The detection system for the organic matter content of the steam sample of the steam power equipment provided by the embodiment comprises the following steps:
1) The water sample passes through a first conductivity detector 1 at the flow rate L to obtain a water sample conductivity value; the water sample is separated into an a flow path and a b flow path after cations are removed by an electric automatic regeneration cation exchange system 6, wherein the flow rate of the a flow path is 3L/5, and the flow rate of the b flow path is 2L/5;
2) The flow path a is continuously divided into a 1 Flow path and a 2 A flow path; a, a 1 The flow rate of the flow path is L/5; a, a 2 The flow rate of the flow path is 2L/5; a, a 1 The flow path sequentially passes through the second conductivity detector 2, the first oxidation unit 8 and the third conductivity detector 3 and then is discharged out of the system, and TOCi content of the obtained water sample, conductivity obtained by discharging the sample and removing cations and hydrogen conductivity of the water sample are obtained; a, a 2 The flow path is divided into a by an electric automatic regeneration anion exchange system 7 to remove anions in the water sample to obtain pure water 21 Flow path and a 22 A flow path; a, a 21 Flow path flow and a 22 The flow rate of the flow path is L/5;
3) b, after the pH value of the water sample in the flow path is regulated to about 2, dividing the water sample into b 1 Flow path and b 2 Flow path b 1 Flow path and b 2 The flow rate of the flow path is L/5; b 1 The flow path flows through the water side exhaust system of the first carbon dioxide collection system 10; b 2 The flow path sequentially passes through the second oxidation unit 9 and the second carbon dioxide collecting system 11 water side discharge system; a, a 21 The 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 the deaerated hydrogen conductivity of the water sample; a, a 22 The flow path sequentially passes through the collecting side of the second carbon dioxide collecting system 11 and the fifth conductivity detector 5 to obtain the TC content of the water sample;
4) And obtaining 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=TOCi-TOC.
In this example, b-path water sample conditioning was accomplished by adding phosphoric acid to convert all of the carbonate (hydrogen) salts in the water sample to CO 2 。
In this embodiment, due to b 1 A flow path into the water side, b, of the first carbon dioxide collection system 10 1 CO in a flow path 2 The gas permeable membrane passing through the first carbon dioxide collection system 10 will enter a 21 In the pure water of the flow path, the value measured by the conductivity detector 4 canReflecting IC content (inorganic carbon, CO) of water sample 2 Total carbonate), b) 2 The flow path passes through the second oxidation unit 9 and then enters the water side of the second carbon dioxide collecting system 11, and the second oxidation unit 9 can make b 2 Organic matters of the water sample in the flow path are completely decomposed into CO 2 And inorganic ions, the same thing, b 2 CO in a flow path water sample 2 The gas-permeable membrane (originally contained in the water sample and generated by the decomposition of organic substances) passing through the second carbon dioxide collection system 11 will enter a 22 In the pure water in the flow path, the value measured by the conductivity detector 5 reflects the TC amount (total carbon) content of the water sample.
In this embodiment, the detection value of the first conductivity detector 1 can obtain the conductivity of the water sample, the detection value of the second conductivity detector 2 can obtain the hydrogen conductivity of the water sample, and the TOCi content is further calculated by adopting a conventional method according to the conductivity difference value detected by the third conductivity detector 3 and the second conductivity detector 2; the difference between the conductivity measured by the second conductivity detector 2 and the conductivity measured by the fourth conductivity detector 4 can be calculated to obtain the degassed hydrogen conductivity of the water sample; according to the detection value of the fifth conductivity detector 5, the content of TC (total carbon index) in the water sample is further calculated and obtained by adopting a conventional method.
In this example, the conductivity index of the degassed hydrogen of the water sample is the difference between the conductivity value measured by the second conductivity detector 2 and the conductivity value measured by the fourth conductivity detector 4.
In the detection system provided by the embodiment, for the water sample of the pure water ammonia adding system, the simulation calculation system can be also selected and installed after the first conductivity detector 1 to calculate the pH value and the ammonia content of the water sample.
Claims (9)
1. A steam power equipment steam sample organic matter content detecting system, its 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 sequentially communicated with the first oxidation unit (8) and the third conductivity detector (3); the electric automatic regeneration anion exchange system (7) is respectively communicated with the first carbon dioxide collecting system (10) and the second carbon dioxide collecting system (11); the first carbon dioxide collection system (10) is communicated 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);
the first carbon dioxide collecting system (10) and the second carbon dioxide collecting system (11) have the same structure and comprise a shell and a gas permeable membrane in one 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 with the gas phase collecting side of the second carbon dioxide collecting system (11); the fourth conductivity detector (4) is connected with the gas phase collecting side of the first carbon dioxide collecting 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 a second carbon dioxide collection system (11).
2. The vapor power plant vapor sample organic matter content detection system of claim 1, wherein: the first oxidation unit (8) and the second oxidation unit (9) are both water flow built-in optical oxidation units.
3. A detection method based on the steam power equipment water vapor sample organic matter content detection system as claimed in claim 2, which is characterized in that: the detection method comprises the following steps:
1) The water sample passes through a first conductivity detector (1) to obtain a water sample conductivity value, a water sample pH value and an ammonia content; removing cations in the water sample by an electric automatic regeneration cation exchange system (6) to obtain cations and dividing the cations into a flow path a and a flow path b;
2) The flow path a is continuously divided into a 1 Flow path and a 2 A flow path; a, a 1 The flow path sequentially passes through the second conductivity detector (2), the first oxidation unit (8) and the third conductivity detector (3) and then is discharged out of the system, so that the hydrogen conductivity of the water sample and the TOCi content of the water sample are obtained; a, a 2 The flow path is divided into a by an electric automatic regeneration anion exchange system (7) to remove anions in the water sample to obtain pure water 21 Flow path and a 22 A flow path;
3) b, after the pH value of the water sample in the flow path is regulated to about 2, dividing the water sample into b 1 Flow path and b 2 Flow path b 1 The flow path flows through a water side discharge system of the first carbon dioxide collection system (10); b 2 The flow path sequentially passes through a water side discharge system of the second oxidation unit (9) and the second carbon dioxide collecting system (11); a, a 21 The 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 meanwhile, the deaerated hydrogen conductivity of the water sample is obtained; a, a 22 The flow path sequentially passes through the collecting side of the second carbon dioxide collecting system (11) and the fifth conductivity detector (5) to obtain the TC content of the water sample;
4) And obtaining TOC content and TOCd content in the water sample according to the TOCi content, the IC content and the TC content.
4. A detection method according to claim 3, wherein: in step 4), toc=tc-IC; TOCd=TOCi-TOC.
5. A detection method according to claim 3, wherein: in the step 1), the flow ratio of the a flow path to the b flow path is 3:2.
6. a detection method according to claim 3, wherein: in the step 2), a 1 Flow path and a 2 The flow ratio of the flow path was 1:2;a 21 flow path and a 22 The flow ratio of the flow path was 1:1.
7. a detection method according to claim 3, wherein: in the step 3), b flow path water sample adjustment is completed by adding phosphoric acid.
8. A detection method according to claim 3, wherein: in the step 3), b 1 Flow path and b 2 The flow ratio of the flow path was 1:1.
9. the method of detecting according to claim 8, wherein: in the step 3), the degassed hydrogen conductivity of the water sample is the difference 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 |
|---|---|---|---|
| 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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