CN203502327U - Device and system for monitoring corrosion of thermodynamic system of thermal power generating unit on line - Google Patents
Device and system for monitoring corrosion of thermodynamic system of thermal power generating unit on line Download PDFInfo
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- CN203502327U CN203502327U CN201320687509.9U CN201320687509U CN203502327U CN 203502327 U CN203502327 U CN 203502327U CN 201320687509 U CN201320687509 U CN 201320687509U CN 203502327 U CN203502327 U CN 203502327U
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- exchange column
- power generating
- generating unit
- drum
- gas separator
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- 238000005260 corrosion Methods 0.000 title claims abstract description 26
- 230000007797 corrosion Effects 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title abstract description 13
- 238000005342 ion exchange Methods 0.000 claims abstract description 13
- 238000007405 data analysis Methods 0.000 claims abstract description 11
- 238000005341 cation exchange Methods 0.000 claims description 12
- 238000012806 monitoring device Methods 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 5
- 230000002378 acidificating effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 34
- 239000007789 gas Substances 0.000 abstract description 30
- 239000001257 hydrogen Substances 0.000 abstract description 24
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 24
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 22
- 230000007774 longterm Effects 0.000 abstract description 3
- 238000005070 sampling Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 18
- 238000005259 measurement Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 235000014171 carbonated beverage Nutrition 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
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Abstract
The utility model provides a device and a system for monitoring corrosion of a thermodynamic system of a thermal power generating unit on line. The device comprises a thermostatic bath (1), and an ion exchange column (2) connected with the thermostatic bath (1), wherein the other end of the ion exchange column (2) is connected with a flowmeter (3); the other end of the flowmeter (3) is connected with a gas separator (4); the gas separator (4) is respectively connected with an air inlet pipe (5), an overflow tank (6) and a heat conductometer (7); the heat conductometer (7) is respectively connected with an air saturator (8) and a data analysis and display device (9); the thermostatic bath (1) is connected with the thermodynamic system of the thermal power generating unit. The utility model provides a set of device capable of measuring dissolved hydrogen content in vapor water at each sampling point, the corrosion conditions are judged, and early warning is given. By virtue of long-term online monitoring of the device, a change relationship of the dissolved hydrogen brought by various operations of the unit is established, and the corrosion conditions in the unit are researched in real time.
Description
Technical field
The utility model relates to thermoelectricity power field, specifically, relates to a kind of fired power generating unit therrmodynamic system on-line corrosion monitoring device and system thereof.
Background technology
Unit is in the process of operation; in metal wall and high-temperature water, be accompanied by the generation of denier corrosion constantly; and produce the dissolving H2 of denier; by the monitoring to system dissolves hydrogen; whether the oxide film that can effectively judge the formation of metal wall is complete; remind professional to corrode and make very soon correct assessment therrmodynamic system, find out corrosion place hydrogen richness more low more stable, illustrate that the diaphragm of metal wall formation is finer and close.
Although current domestic unit also, not about the control criterion of dissolved hydrogen, launches to study and develop ripe product at Systems in Certain Developed Countries already.As the early stage a complete set of import unit of introducing is sent out the monitoring device that factory etc. is all furnished with dissolved hydrogen as Dagang Power Plant, Shanxi sunlight.
At present, in order to prevent the corrosion of fired power generating unit therrmodynamic system, be mainly to control aspect boiler feed water water quality, the indices parameter of monitoring boiler feed water, but the degree of the corrosion occurring for reality but cannot provide judgement intuitively.
At present, prior art mainly adopts electrode method for the mensuration of oligodynamical hydrogen in water.Probe is inserted while carrying out the mensuration of dissolved hydrogen in water, because galvanic action or impressed voltage produce potential difference (PD) between two electrodes, make silver chloride electrode be reduced into silver at negative electrode, it is oxidized that while hydrogen loses electronics by film diffusion to anode, the electric current producing is directly proportional to the transmission speed of passing the hydrogen of film and dielectric substrate, and this electric current is directly proportional to the dividing potential drop (or concentration) of hydrogen in water at a certain temperature.
The method needs unit just can detect the corrosion condition of unit when shutting down, and workload is huge simultaneously.To the corrosion occurring in unit running process, cannot monitor, do not reach the object of early warning.And the method is easily subject to the interference of water sample flow and oxygen in water, cause the fluctuation of measurement data.Electrode is easily polluted simultaneously, and the life-span is shorter, and renewal cost is high.
Utility model content
The utility model is by a set of fired power generating unit therrmodynamic system carbonated drink dissolved hydrogen pick-up unit of design, the corrosion condition in real time therrmodynamic system being occurred carries out tracking and monitoring, instruct the adjustment of unit regular job and operating condition, amplitude peak reduces the generation of unit corrosion.
An object of the present utility model is to provide a kind of fired power generating unit therrmodynamic system on-line corrosion monitoring device.
Another object of the present utility model is to provide the fired power generating unit that comprises described device therrmodynamic system.
For reaching above-mentioned purpose, on the one hand, the utility model provides a kind of fired power generating unit therrmodynamic system on-line corrosion monitoring device, described device comprises calibration cell 1, the ion exchange column 2 being connected with calibration cell 1, ion exchange column 2 other end connection traffic meters 3, flowmeter 3 other ends connect gas separator 4, described gas separator 4 also connects respectively draft tube 5, overflow groove 6 and heat conductometer 7, and heat conductometer 7 also connects respectively air saturator 8 and data analysis display unit 9; Wherein, calibration cell 1 is connected with fired power generating unit therrmodynamic system.
Each above-mentioned device of the utility model all can adopt respectively the conventional equipment of prior art, for example,
According to specific embodiments of the present utility model, the preferred described ion exchange column 2 of the utility model is cation exchange column.
According to specific embodiments of the present utility model, the preferred described cation exchange column 2 of the utility model is filled strongly acidic cation-exchange.
According to specific embodiments of the present utility model, the preferred described flowmeter 3 of the utility model is suspended body flowmeter.
According to specific embodiments of the present utility model, the preferred described data analysis display unit 9 of the utility model connects host computer 10.
According to specific embodiments of the present utility model, the preferred described gas separator 4 of the utility model comprises separated bell jar 41 and Venturi tube 42.
On the other hand, the utility model also provides a kind of fired power generating unit therrmodynamic system that comprises monitoring device described in the utility model.
According to specific embodiments of the present utility model, the preferred described system of the utility model comprises economizer 27 and drum 29, and described device is connected on the porch and drum 29 of economizer 27.
According to specific embodiments of the present utility model, the preferred described system of the utility model also comprises condenser 21, condensate pump 22, low-pressure heater 23, oxygen-eliminating device 24, feed pump 25, high-pressure heater 26, the economizer 27 being linked in sequence, economizer 27 other ends connect drum 29, drum 29 other ends connect superheater 30, and drum 29 also connects the import and export of water-cooling wall 28.
First water passes through calibration cell 1, coolant-temperature gage is controlled at 25 ℃ of left and right in the future, and the water sample after constant temperature enters into cation exchange column 2 subsequently, and fundamental purpose is the ammonium ion of removing in water sample, avoid having ammonia to overflow in follow-up measurement, the measurement of dissolved hydrogen is caused to interference.Water sample is adjusted to after desired flow through suspended body flowmeter 3 again, enter into gas separator 4, in the interior separation that realizes aqueous vapor of gas separator 4, degassed water sample is discharged through overflow groove 6, gas separator is connected with draft tube 5, the gas of separating from gas separator 4 enters into heat conductometer 7 and measures, and heat conductometer is also connected with air saturator 8.Measurement result shows in real time on data analysis display unit 9, also can in the analytic system of host computer 10, consult at any time simultaneously.
In sum, the utility model provides a kind of fired power generating unit therrmodynamic system on-line corrosion monitoring device and system thereof.Device tool of the present utility model has the following advantages:
The utility model provides a set of device that can measure the dissolved hydrogen content in each sampling spot carbonated drink of therrmodynamic system, and to corroding, a situation arises judges, and carries out early warning.By the long-term on-line monitoring of this device, be intended to set up the variation relation of the dissolved hydrogen that unit operations brings, the corrosion condition in real time unit being occurred is studied.After having grasped the basic variation relation of dissolved hydrogen, the operation in Unit Commitment process, unit operation operating mode are optimized to adjustment, reduce to greatest extent the corrosion of unit.
Accompanying drawing explanation
Fig. 1 is the monitoring device schematic diagram of embodiment 1; Wherein, each symbol table is shown: 1 calibration cell, 2 ion exchange columns, 3 flowmeters, 4 gas separators, 5 draft tube, 6 overflow grooves, 7 heat conductometers, 8 air saturators, 9 data analysis display units, 10 host computers;
Fig. 2 is the fired power generating unit therrmodynamic system schematic diagram of embodiment 1; Wherein, each symbol table is shown: 21 condensers, 22 condensate pumps, 23 low-pressure heaters, 24 oxygen-eliminating devices, 25 feed pumps, 26 high-pressure heaters, 27 economizers, 28 water-cooling walls, 29 drums, 30 superheaters, 31 monitoring devices;
Fig. 3 is the gas separator schematic diagram in embodiment 1, and wherein, each symbol table is shown: 41 separated bell jars, 42 Venturi tubes, 43 water sample entrances, 44 gas vents, 45 water sample outlets.
Embodiment
By specific embodiment, describe below the beneficial effect of implementation process of the present utility model and generation in detail, be intended to help reader to understand better essence of the present utility model and feature, not as restriction that can practical range to this case.
1, the measurement of dissolved hydrogen in water sample:
The utility model monitoring device as shown in Figure 1, described device comprises calibration cell 1, the ion exchange column 2 being connected with calibration cell 1, ion exchange column 2 other end connection traffic meters 3, flowmeter 3 other ends connect gas separator 4, described gas separator 4 also connects respectively draft tube 5, overflow groove 6 and heat conductometer 7, and heat conductometer 7 also connects respectively air saturator 8 and data analysis display unit 9; Wherein, calibration cell 1 is connected with fired power generating unit therrmodynamic system.Described ion exchange column 2 is for filling the cation exchange column of strongly acidic cation-exchange, described flowmeter 3 is suspended body flowmeter, described data analysis display unit 9 connects host computer 10, described gas separator 4 comprises separated bell jar 41 and Venturi tube 42, Venturi tube upper end is water sample entrance 43, lower end is water sample outlet 45, and gas vent 44 is offered in centre.
Fired power generating unit therrmodynamic system as shown in Figure 2, comprises economizer 27 and drum 29, and monitoring 31 devices described in the utility model are connected on the porch and drum 29 of economizer 27.Wherein said system also comprises condenser 21, condensate pump 22, low-pressure heater 23, oxygen-eliminating device 24, feed pump 25, high-pressure heater 26, the economizer 27 being linked in sequence, economizer 27 other ends connect drum 29, drum 29 other ends connect superheater 30, and drum 29 also connects the import and export of water-cooling wall 28.
Working-flow of the present utility model is: first water passes through calibration cell 1, coolant-temperature gage is controlled at 25 ℃ of left and right in the future, water sample after constant temperature enters into cation exchange column 2 subsequently, fundamental purpose is the ammonium ion of removing in water sample, avoid having ammonia to overflow in follow-up measurement, the measurement of dissolved hydrogen is caused to interference.In cation exchange column, be filled with strongly acidic cation-exchange, every two weeks is changed regeneration and is processed.Water sample is adjusted to after certain flow through suspended body flowmeter 3 again, enters into gas separator 4, in the interior separation that realizes aqueous vapor of gas separator 4.Gas separator 4 is to be combined and formed by separated bell jar 41 and Venturi tube 42, as shown in Figure 3.Meanwhile, fresh air also enters gas separator by draft tube 5, because the flow velocity of water sample in Venturi tube is very fast, so the mixed gas in water sample constantly carries out separated with water.Isolated water is discharged by overflow groove 6, is diffused into the measuring sensor of heat conductometer 7 from the isolated mixed gas of gas vent 44.When the isolated mixed gas of gas separator diffuses to heat conductometer, the water of air saturator 8 and gas also form saturated aqueous vapor and enter heat conductometer.So just can read heat conductometer electrode reading, calculate hydrogen content in water sample, and show in real time on data analysis display unit 9.
2, determining of instrument zero:
While determining the zero point of instrument, the zero correction valve of gas separator 4 is in opening.Now, when water is passed through gas separator, will not there is not gas-water separation effect, directly by overflow groove 6, discharge.The saturated aqueous vapor that enters into gas separator by draft tube 5 directly enters into heat conductometer and measures.Meanwhile, the saturated aqueous vapor of the gentle composition of water of air saturator 8 also enters into heat conductometer and measures.What reference elements and measuring sensor detected like this is all saturated aqueous vapor, is defined as thus the zero point of instrument, is shown as zero on data analysis display unit 9.
3, therrmodynamic system corrosion monitoring:
When therrmodynamic system is carried out to corrosion monitoring, the water sample of monitoring system can be connected with this device, its dissolved hydrogen level of Real-Time Monitoring, thus reflect its corrosion condition.Described therrmodynamic system comprise the condenser 21 that is linked in sequence, condensate pump 22, low-pressure heater 23, oxygen-eliminating device 24, feed pump 25, high-pressure heater 26, economizer 27,, economizer 27 other ends connect drum 29, drum 29 other ends connect superheater 30, and drum 29 also connects the import and export of water-cooling wall 28.Respectively economizer 27 entrances are connected with this device with drum 29, form a set of therrmodynamic system corrosion monitoring system.Wherein, the dissolved hydrogen that economizer porch records mainly informs corrosion in water system, and a situation arises; By to the dissolved hydrogen monitor value of stove water in drum and the dissolved hydrogen monitor value comparison of economizer porch, can reflect the corrosion condition of economizer and water-cooling wall 28.Above-mentioned relatively numerical value shows in real time on host computer computer, and corresponding one by one with the index such as current unit load, feedwater pH, feedwater hydrogen conductivity, through long term data observation and accumulation, just can set up that therrmodynamic system is corroded and each parameter of unit between corresponding relation.
Claims (8)
1. a fired power generating unit therrmodynamic system on-line corrosion monitoring device, it is characterized in that, described device comprises calibration cell (1), the ion exchange column (2) being connected with calibration cell (1), ion exchange column (2) other end connection traffic meter (3), flowmeter (3) other end connects gas separator (4), described gas separator (4) also connects respectively draft tube (5), overflow groove (6) and heat conductometer (7), and heat conductometer (7) also connects respectively air saturator (8) and data analysis display unit (9); Wherein, calibration cell (1) is connected with fired power generating unit therrmodynamic system.
2. device according to claim 1, is characterized in that, described ion exchange column (2) is cation exchange column.
3. device according to claim 2, is characterized in that, described ion exchange column (2) is for filling the cation exchange column of strongly acidic cation-exchange.
4. device according to claim 1, is characterized in that, described data analysis display unit (9) connects host computer (10).
5. device according to claim 1, is characterized in that, described gas separator (4) comprises separated bell jar (41) and Venturi tube (42).
6. one kind comprises the fired power generating unit therrmodynamic system of installing described in claim 1～5 any one.
7. system according to claim 6, is characterized in that, described system comprises economizer (27) and drum (29), and described device (31) is connected on economizer porch and drum.
8. system according to claim 7, it is characterized in that, described system also comprises condenser (21), condensate pump (22), low-pressure heater (23), oxygen-eliminating device (24), feed pump (25), high-pressure heater (26), the economizer (27) being linked in sequence, economizer (27) other end connects drum (29), drum (29) other end connects superheater (30), and drum (29) also connects the import and export of water-cooling wall (28).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320687509.9U CN203502327U (en) | 2013-11-01 | 2013-11-01 | Device and system for monitoring corrosion of thermodynamic system of thermal power generating unit on line |
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| CN201320687509.9U CN203502327U (en) | 2013-11-01 | 2013-11-01 | Device and system for monitoring corrosion of thermodynamic system of thermal power generating unit on line |
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| CN203502327U true CN203502327U (en) | 2014-03-26 |
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| CN201320687509.9U Expired - Lifetime CN203502327U (en) | 2013-11-01 | 2013-11-01 | Device and system for monitoring corrosion of thermodynamic system of thermal power generating unit on line |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634723A (en) * | 2015-01-12 | 2015-05-20 | 内蒙古自治区电力科学研究院 | Metal corrosion speed detection method and metal corrosion speed detection device |
| CN105424390A (en) * | 2015-11-11 | 2016-03-23 | 华北电力大学 | Power plant steam and water system comprehensive corrosion monitoring system and method |
-
2013
- 2013-11-01 CN CN201320687509.9U patent/CN203502327U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634723A (en) * | 2015-01-12 | 2015-05-20 | 内蒙古自治区电力科学研究院 | Metal corrosion speed detection method and metal corrosion speed detection device |
| CN104634723B (en) * | 2015-01-12 | 2018-10-09 | 内蒙古自治区电力科学研究院 | Metal erosion speed detection method and detection device |
| CN105424390A (en) * | 2015-11-11 | 2016-03-23 | 华北电力大学 | Power plant steam and water system comprehensive corrosion monitoring system and method |
| CN105424390B (en) * | 2015-11-11 | 2018-07-31 | 华北电力大学 | A kind of Steam-Water System in Power Plant general corrosion monitoring system and method |
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