CN203287766U - Monitoring device for detecting leakage of hydrogen into inner cooling water and evaluating impact on quality of inner cooling water - Google Patents
Monitoring device for detecting leakage of hydrogen into inner cooling water and evaluating impact on quality of inner cooling water Download PDFInfo
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- CN203287766U CN203287766U CN201320331066XU CN201320331066U CN203287766U CN 203287766 U CN203287766 U CN 203287766U CN 201320331066X U CN201320331066X U CN 201320331066XU CN 201320331066 U CN201320331066 U CN 201320331066U CN 203287766 U CN203287766 U CN 203287766U
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- inner cooling
- cold water
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Abstract
The utility model relates to a power generator auxiliary device system of a thermal power plant, and belongs to the field of mechanical-electrical integration. The utility model particularly relates to a monitoring device for detecting leakage of hydrogen into inner cooling water and evaluating impact on quality of inner cooling water. The monitoring device comprises a power generator, an inner cooling water box and an inner cooling water pump. An outlet online conductivity and pH meter is connected with an inlet sampling pipe manual swing door which is further connected with a power generator inner cooling water outlet pipe. An inlet online conductivity and pH meter is connected with an outlet sampling pipe manual swing door which is further connected with a power generator inner cooling water inlet pipe. A water tank breathing mouth online hydrogen leakage detecting instrument is connected with a water tank breathing mouth sampling pipe manual swing door which is further connected with an inner cooling water tank breathing mouth. The monitoring device can continuously detect and evaluate and monitor the quality state of inner cooling water so as to ensure that the impact of leakage of hydrogen on the quality of inner cooling water is timely and accurately identified and evaluated, and the power generator is safely operated.
Description
Technical field
The utility model relates to a kind of generator subsidiary engine device systems of fuel-burning power plant, belongs to the electromechanical integration field, relates in particular to a kind of hydrogen that detects and bleeds in inner cold water and assessment affects the monitoring device of inner cold water water quality.
Background technology
Electric generator inner cooling water water quality is most important to the safe operation of unit.Generator is in start-up course, because not thorough with the hydrogen exchange carbon dioxide, and air in service often bleeds by sealing oil system, all can pollute hydrogen.Because Hydrogen Vapor Pressure is higher than electric generator inner cooling water pressure, hydrogen often exists sand holes or crackle to bleed in inner cold water by polytetrafluoro water connecting pipe joint or connecting portion or intake female tube wave line compensator corrugated tube and steel flange joint weld place, capital causes the pH of inner cold water to descend, conductivity anomaly, cause serious consequence.Work as H
2And CO
2After entering into inner cold water and causing that inner cold water water quality is abnormal, can cause following impact:
1, dissolve CO in water
2Impact on the copper conductor corrosion.
Electric generator inner cooling water is pure water, and resiliency is very little, even a small amount of CO is arranged
2Enter, the pH value of water is sharply descended, minimum pH value can be down to below 6, makes copper fall into corrosion region, and the diaphragm on copper surface is damaged, and causes heavy corrosion.In addition, CO
2Also can with the oxygen synergy, make the cupric oxide diaphragm on copper surface change basic copper carbonate into, reaction equation:
2Cu
2O＋CO
2＋H
2O＋O
2→2CuCO·2Cu(OH)
2
Be a kind of loose product of green due to basic copper carbonate, be easy to peel off under current scour, the content of dissolved copper in water is increased.
2, H
2Reducing action is arranged, can make Reduction of Oxide, as reductive copper oxide:
The copper that restores can be separated out in the high place of stator conductor temperature, forms inhomogeneous copper facing phenomenon, causes the flow area of stator pipeline to reduce, and resistance strengthens, and its cooling capacity is descended, and causes generator line rod overheated.
When 3, above-mentioned two kinds of impacts are serious, all likely stop up hollow copper conductor, cause line rod scaling loss.
4, the inner cold water conductivity raises, and the inner cold water electric conductivity is strengthened, and causes the generator lend wire shorted to earth, causes leakage current and energy loss to increase, and also electric flashover can occur when serious.
As shown in Figure 1, in the electric generator inner cooling water system, the conductivity, the pH value that detect electric generator inner cooling water inlet or outlet are only arranged in prior art, to detect inner cold water water quality situation.Many factors due to the conductivity that can affect inner cold water water quality, pH value, when be only bleed in inner cold water due to hydrogen and cause the conductivity of inner cold water, when the pH value changes, can't promptly and accurately judge this affects situation, thereby has the generator potential safety hazard.Therefore, the impact that monitoring analysis hydrogen bleeds in inner cold water and assessment causes is most important.
There is no at present special detection bleeds in inner cold water for hydrogen and assessment affects the monitoring device of inner cold water water quality.
The utility model content
The utility model is for problems of the prior art, provide a kind of hydrogen that detects to bleed in inner cold water and assessment affect the monitoring device of inner cold water water quality, its objective is the problem that hydrogen bleeds in inner cold water and affects the aspects such as the excellent burn into obstruction of generator line that inner cold water water quality brings that solves.
The technical scheme that its technical matters that solves the utility model adopts is:
Detect hydrogen and bleed in inner cold water and assessment affects the monitoring device of inner cold water water quality, comprising: generator, inner cold water water tank, inner cold water pump; Be to be connected with the manual pipe valve of entrance stopple coupon by the online conductivity of outlet and pH table, the manual pipe valve of entrance stopple coupon is connected on the electric generator inner cooling water outlet pipe again; The online conductivity of entrance and pH table are connected with the manual pipe valve of outlet stopple coupon, and the manual pipe valve of outlet stopple coupon is connected on the electric generator inner cooling water inlet tube again; The online hydrogen gas leakage detector of water tank pneumostome is connected with the manual pipe valve of water tank pneumostome stopple coupon, and the manual pipe valve of water tank pneumostome stopple coupon is connected to inner cold water case pneumostome place again.
Wherein: the signal input part of PLC Programmable Logic Controller is connected with outlet online conductivity and pH table, the online conductivity of entrance and pH table and the online hydrogen gas leakage detector of water tank pneumostome respectively; Simultaneously, the signal output part of PLC Programmable Logic Controller is connected with host computer and warning device.
The online hydrogen gas leakage detector of described water tank pneumostome can replace with manually holding the hydrogen gas leakage detector leak detection.
Described host computer and warning device, wherein host computer refers to that the people can directly send the computing machine of controlling order, shows in real time conductivity (DD), the pH value of entry and exit on screen and leaks hydrogen number situation of change and result of calculation.
Advantage of the present utility model and beneficial effect are:
The utility model is owing to installing respectively online inner cold water conductivity (DD) and the pH value table measured of a cover additional on electric generator inner cooling water inlet and outlet, reach and install an online hydrogen monitoring device of cover at inner cold water water tank pneumostome place additional, an and supporting control system, after inner cold water conductivity (DD), pH value and water tank pneumostome hydrogen monitor value into and out of generator being detected and changing, by assessment, judgement affects situation, finds that in time inner cold water leaks the hydrogen situation, eliminates the generator potential safety hazard.
The utility model can continuous detecting also be assessed monitoring inner cold water water quality situation, for promptly and accurately finding and assess Lou hydrogen, the impact of inner cold water water quality and the safe operation of generator is provided safeguard.The utility model also has can promptly and accurately find and assess the Lou impact of hydrogen on inner cold water water quality; Avoided the unnecessary equipment loss of generator, the security that has improved unit; Can also be as production, its economic benefits.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Description of drawings
Fig. 1 adopts the structural representation of hydrogen leakage monitor system in background technology;
Fig. 2 is primary structure schematic diagram of the present utility model.
In figure: generator 1, inner cold water water tank 2, inner cold water pump 3, the manual pipe valve 4 of entrance stopple coupon, the manual pipe valve 5 of outlet stopple coupon, the manual pipe valve 6 of water tank pneumostome stopple coupon, export online conductivity and pH table 7, the online conductivity of entrance and pH table 8, the online hydrogen gas leakage detector 9 of water tank pneumostome, PLC Programmable Logic Controller 10, host computer and warning device 11.
Embodiment
The utility model, for detecting hydrogen and bleed in inner cold water and assessment affecting the monitoring device of inner cold water water quality, is applied in the generator subsidiary engine equipment of fuel-burning power plant.
The utility model is implemented by following technical scheme:
The utility model comprises: PLC Programmable Logic Controller 10, host computer and warning device 11, the manual pipe valve 4 of entrance stopple coupon, the manual pipe valve 5 of outlet stopple coupon, the manual pipe valve 6 of water tank pneumostome stopple coupon, export online conductivity and pH table 7, the online conductivity of entrance and pH table 8, the online hydrogen gas leakage detector 9 of water tank pneumostome forms.
The manual pipe valve 4 that exports online conductivity and pH table 7 and entrance stopple coupon is connected, and the manual pipe valve 4 of entrance stopple coupon is connected on the electric generator inner cooling water outlet pipe again; The online conductivity of entrance and pH table 8 are connected with the manual pipe valve 5 of outlet stopple coupon, and the manual pipe valve 5 of outlet stopple coupon is connected on the electric generator inner cooling water inlet tube again; The online hydrogen gas leakage detector 9 of water tank pneumostome is connected with the manual pipe valve 6 of water tank pneumostome stopple coupon, and the manual pipe valve 6 of water tank pneumostome stopple coupon is connected to inner cold water case pneumostome place again.
Wherein: the signal input part of PLC Programmable Logic Controller 10 is connected with outlet online conductivity and pH table 7, the online conductivity of entrance and pH table 8 and the online hydrogen gas leakage detector 9 of water tank pneumostome respectively; Simultaneously, the signal output part of PLC Programmable Logic Controller 10 is connected with host computer and warning device 11.
As shown in Figure 2, this system includes PLC Programmable Logic Controller 10 and host computer and warning device 11; So-called host computer refers to that the people can directly send the computing machine of controlling order, shows in real time conductivity (DD), the pH value of entry and exit on screen and leaks hydrogen number situation of change and result of calculation.Online conductivity (DD), pH value and water tank that the signal input part of PLC Programmable Logic Controller 10 is respectively the inner cold water entry and exit sampling detection of turnover generator leak the leakage hydrogen amount of hydrogen device detection or manually complete leak detection; Simultaneously, the signal of PLC Programmable Logic Controller 10 is to host computer and warning device 11 output alarm signals.
According to the principle that carbon dioxide exerts an influence to conductivity and the pH value of inner cold water, the general employing:
A. host computer and warning device 11 can show online that inner cold water goes out, enters the operating condition of the online conductivity (DD) of generator, pH value and leakage hydrogen number;
B. watch-keeping, the situation of change of calculating conductivity (DD), pH value and leaking hydrogen number;
C. send alerting signal according to the situation of change of conductivity (DD), pH value and leakage hydrogen number.
The calculate platform that PLC Programmable Logic Controller 10 is comprised of host computer and part hardware, it can pass through the input interface input signal with analog quantity and switching value, after logic judgement and computing, then will pass to warning device by output interface with the form of analog quantity and switching value.
The Gather and input signal.The input signal of this device is the inner cold water online conductivity (DD) that goes out, enter generator, pH value and leaks hydrogen number etc. and be signal source in original system.
Set up mathematical model.According to carbon dioxide in hydrogen, the air theory relation to conductivity (DD), pH value in inner cold water water quality, the establishment mathematical model, and draw out, enter conductivity and pH value difference value in the inner cold water of generator with calculated with mathematical model, compare, analyze, judge.
Implement open loop and calculate control., with the actual measurement parameter of control object,, by the parameter chart, calculate conductivity, pH value difference value, and with former end difference, compare, in case, greater than the poor a certain value of former end, will send alerting signal.
The input parameter defence program is set., for preventing when insincere, sending false command because of input parameter, guarantee the accuracy of result of calculation.
Claims (3)
1. detect hydrogen and bleed in inner cold water and assessment affects the monitoring device of inner cold water water quality, comprising: generator (1), inner cold water water tank (2) and inner cold water pump (3); It is characterized in that:
The manual pipe valve (4) that exports online conductivity and pH table (7) and entrance stopple coupon is connected, and the manual pipe valve (4) of entrance stopple coupon is connected on the electric generator inner cooling water outlet pipe again; The online conductivity of entrance and pH table (8) are connected with the manual pipe valve (5) of outlet stopple coupon, and the manual pipe valve (5) of outlet stopple coupon is connected on the electric generator inner cooling water inlet tube again; The manual pipe valve (6) of the online hydrogen gas leakage detector of water tank pneumostome (9) and water tank pneumostome stopple coupon is connected, and the manual pipe valve (6) of water tank pneumostome stopple coupon is connected to inner cold water case pneumostome place again;
The signal input part of PLC Programmable Logic Controller (10) shows (8) with the online conductivity of outlet and pH table (7), the online conductivity of entrance and pH respectively and the online hydrogen gas leakage detector of water tank pneumostome (9) is connected; Simultaneously, the signal output part of PLC Programmable Logic Controller (10) is connected with host computer and warning device (11).
2. detection hydrogen according to claim 1 bleeds in inner cold water and assessment affect the monitoring device of inner cold water water quality, and it is characterized in that: the online hydrogen gas leakage detector of described water tank pneumostome (9) can be with manually holding hydrogen gas leakage detector leak detection replacement.
3. detection hydrogen according to claim 1 bleeds in inner cold water and assessment affects the monitoring device of inner cold water water quality, it is characterized in that: described host computer and warning device (11), wherein host computer refers to that the people can directly send the computing machine of controlling order, shows in real time conductivity (DD), the pH value of entry and exit on screen and leaks hydrogen number situation of change and result of calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320331066XU CN203287766U (en) | 2013-06-08 | 2013-06-08 | Monitoring device for detecting leakage of hydrogen into inner cooling water and evaluating impact on quality of inner cooling water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320331066XU CN203287766U (en) | 2013-06-08 | 2013-06-08 | Monitoring device for detecting leakage of hydrogen into inner cooling water and evaluating impact on quality of inner cooling water |
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| Publication Number | Publication Date |
|---|---|
| CN203287766U true CN203287766U (en) | 2013-11-13 |
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|---|---|---|---|
| CN201320331066XU Expired - Lifetime CN203287766U (en) | 2013-06-08 | 2013-06-08 | Monitoring device for detecting leakage of hydrogen into inner cooling water and evaluating impact on quality of inner cooling water |
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| CN (1) | CN203287766U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309327A (en) * | 2013-06-08 | 2013-09-18 | 国家电网公司 | Monitoring device for detecting leak hydrogen in internal cooling water and evaluating influence on quality of internal cooling water |
-
2013
- 2013-06-08 CN CN201320331066XU patent/CN203287766U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103309327A (en) * | 2013-06-08 | 2013-09-18 | 国家电网公司 | Monitoring device for detecting leak hydrogen in internal cooling water and evaluating influence on quality of internal cooling water |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |