CN101922313B - Method for suppressing steam turbine for geothermal power generation from scaling - Google Patents
Method for suppressing steam turbine for geothermal power generation from scaling Download PDFInfo
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- CN101922313B CN101922313B CN 200910052779 CN200910052779A CN101922313B CN 101922313 B CN101922313 B CN 101922313B CN 200910052779 CN200910052779 CN 200910052779 CN 200910052779 A CN200910052779 A CN 200910052779A CN 101922313 B CN101922313 B CN 101922313B
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Abstract
The invention relates to a method for suppressing a steam turbine for geothermal power generation from scaling. The method comprises the following steps of: connecting the steam turbine for geothermal power generation with one end of a three-way valve, and connecting the other end of the three-way valve with a geothermal steam pipeline through a geothermal steam pipeline control valve; connecting the third end of the three-way valve with a pure water steam pipeline control valve, a steam storage pot and a steam generator; vaporizing pure water through the steam generator to obtain pure steam and concentrating the pure steam into the steam storage pot; and controlling the on-off of the geothermal steam pipeline control valve and the pure steam pipeline control valve by utilizing a coordinated control loop to ensure that geothermal steam and pure water steam are alternately introduced into the steam turbine for geothermal power generation. In the invention, the pure water steam is alternately introduced, thereby the steam purity is improved, the continuous stable state of a steam chamber, a steam turbine nozzle and the surface of a moving blade is broken, and the scaling in the steam turbine nozzle, the surface of the moving blade and the whole steam chamber is suppressed; scales can be scoured; and the effect for suppressing scaling can be better with higher frequency and longer persistent acting time.
Description
Technical field
The present invention relates to a kind of method that suppresses fouling, especially relate to a kind of method that suppresses steam turbine for geothermal power generation from scaling.
Background technique
Promote in the process of power generation turbine work at geothermal vapour, geothermal vapour is in the nozzle of steam turbine, and heat energy changes kinetic energy into, when then geothermal vapour is flowed through moving vane, pushing turbine vane rotary acting is transformed into mechanical energy with this part kinetic energy of geothermal vapour.
Geothermal vapour refers to the steam that extracts or the saturated vapour that produces through steam-water separator or development unit from geothermal well.From underground, a lot of geothermal vapours contain and have corrosive H based on geothermal vapour
2S, CO
2With impurity such as boron, silica, iron, sodium and chlorine.In the transformation of energy of steam turbine, its temperature and pressure changes due to geothermal vapour, and this this impurity usually can be attached to the surface of nozzle of steam turbine and moving vane with the form of fouling, or even the steam chest of the geothermal vapour whole steam turbine that can feed through to.
The purity of geothermal vapour has the factor of very big impact on the reliability of power generation turbine, when turbine fouling is serious, not only can make nozzle area reduce and then reduce output, reduce the transformation of energy of steam turbine, and can produce serious underdeposit corrosion, also can make generating difficulty, also can be due to the fouling of nozzle and contacting of moving vane, and can cause moving vane breakage accident.
Tie general dissolubility salt crust for steam turbine, effective drop low-load steam flush or shutdown steam flush method solve; Tie the silicon dirt for steam turbine, general method is to shut down artificial treatment.CN1042365C discloses a kind of method and device that cleans Steam Turbine of Silicon Deposit, and it utilizes NaOH or the KOH alkali lye of 4-13wt%, at suitable temperature, make on turbine rotor and dividing plate with SiO
2Be that main silicon dirt is partly dissolved, utilize its penetrating power, make not molten silicon dirty loose, recycling is cleaned the isolated plant circulation flushing, and the silicon dirt is washed away or washes out, and then the auxiliary physical means that rushes and scrape, brush with water is removed remaining silicon dirt part.
Usually, silicon and silicate can be the chemical species of multiple low solubility according to different condition, comprise monomer, oligomer and colloid silicon, magnesium silicate, calcium silicate and other silicate.This mixture is usually with the term Alternate of silicon or silica or silicon and silicate.If silicon concentration surpasses its solubility, it can deposit and form or a kind of glass coating or an adhesion fouling.In the ground thermal process, comprise the generating of geothermal vapour driving steam turbine, can prevent that with the way that the control temperature is fallen siliceous deposits is on equipment surface.
US Patent No. 6223535 discloses from geothermal power plant and has anticipated and geothermal vapour steam turbine condensate system, collection contains boron, arsenic, the method for the pollutants such as mercury, emphasize and to carry out cleaning to containing boron vapour, cause the impurity of steam turbine corrosion and fouling to eliminate chlorion and other.
After the mechanism of having studied " scale adheres to ", diagnosis nozzle back side Yin Wendu can be evaporated again higher than vapor (steam) temperature and steam, and apart from the about downstream side of 55% position of front acies, it is that the scale of NaCl is separated out that main component is arranged; Nozzle outside of belly Yin Wendu is lower than vapor (steam) temperature and SiO
2Slowly begin to concentrate, it is SiO that main component is arranged near the acies of back
2The scale basis of separating out on, CN1031421C discloses the method for nozzle used in geothermal turbines and antiscale thereof.Namely be provided with cooling water path at underground heat in steam turbine initial segment nozzle, make the latter's inlet side path and the cooling water inlet path UNICOM that is located at the inside-and-outside ring chamber, make simultaneously its outlet side path and coolant outlet path UNICOM.Utilize this structure, cooling water is defeated by cooling water path in nozzle from the cooling water supply source, cause the surface temperature of nozzle to descend, stop thus the evaporation again of effluent on blade surface and concentrated, and prevented separating out of scale.
US Patent No. 6860718 discloses a kind of geothermal steam turbine rotor blade that improves, the parts such as nozzle and turbine rotor, and under the geothermal vapour working environment, opposing corrosion and erosion increase the service life and effectively prevent aging geothermal steam turbine.
Certainly, also have CN2400434Y to disclose a kind of high-pressure electrostatic descaling device that is mainly used in the Cooling Tubes of Condenser scale removal of steam turbine subsidiary engine and prevents from generating incrustation scale, required electrostatic high-pressure several ten thousand volts.
Adopt the washing agent scale removal need to shut down processing; The scale removal of high-pressure electrostatic is the subsidiary engine Cooling Tubes of Condenser scale removal for steam turbine; Act locally on nozzle used in geothermal turbines and antiscale thereof, do not relate to other parts of moving vane and steam chest; The cleaning in advance of geothermal vapour, although considered elimination chlorion and other impurity comprehensively, but be subject to the impact of geothermal vapour utilization ratio and steam turbine for geothermal power generation running parameter, rarely fall separating out of the solubility that may cause and silicon and silicate because of temperature, the fouling on nozzle of steam turbine and moving vane surface still can produce; And improve the parts such as geothermal steam turbine rotor blade, nozzle and turbine rotor, and can only play opposing corrosion and corrode, be not suppress or prevent fouling, when turbine fouling is serious, the reliability of steam turbine for geothermal power generation there is great impact.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of method of improving steam working medium purity, suppressing the inhibition steam turbine for geothermal power generation from scaling of fouling successful for the defective that overcomes above-mentioned prior art existence.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of method that suppresses steam turbine for geothermal power generation from scaling is characterized in that, the method comprises the following steps:
(1) with steam turbine for geothermal power generation connecting tee valve one end, the other end of triple valve connects the geothermal vapour pipeline through geothermal vapour pipe control valve, the 3rd end of triple valve connects pure water steam line control valve, gas storage tank and steam generator successively, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response;
(2) pure water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, control geothermal vapour pipe control valve and pure water steam line control valve and open or close, geothermal vapour and pure water steam are alternately passed into to steam turbine for geothermal power generation.
The number of times that the middle geothermal vapour of described step (3) and pure water steam alternately pass into steam turbine for geothermal power generation is 2-6 time/hour.
In described step (3) geothermal vapour and pure water steam alternately pass into the time of steam turbine for geothermal power generation be 20-360 second/time.
Compared with prior art, the physical property of the pure water steam working medium of checker of the present invention is hot steam equally, and chemical purity is better than geothermal vapour, and designing and calculating foundation and the running parameter of all steam turbine for geothermal power generation do not change because of pure water steam working medium.When improving steam working medium purity, destroyed in steam chest and the continous-stable state on nozzle of steam turbine and moving vane surface, suppress surface and the interior fouling of whole steam chest of nozzle of steam turbine and moving vane.Directly checker pure water steam working medium regularly, can also wash away processing to the fouling that has just produced.The frequency of checker is higher, and the time of continuous action is longer, and its effect that suppresses fouling is better.
Description of drawings
Fig. 1 is steam turbine for geothermal power generation checker working medium pipeline schematic diagram in embodiment 1.
In figure, 1 is that geothermal vapour pipe control valve, 2 is that pure water steam line control valve, 3 is that triple valve, 4 is that geothermal vapour, 5 is that pure water, 6 is that steam turbine for geothermal power generation, 7 is that gas storage tank, 8 is that steam generator, 9 is chain control loop.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
A kind of method that suppresses steam turbine for geothermal power generation from scaling, as shown in Figure 1, the method comprises the following steps:
(1) steam turbine for geothermal power generation 6 is connected with an end of triple valve 3 through the geothermal vapour pipeline, the other end of triple valve 3 is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve 1, geothermal vapour pipe control valve 1 the other end connecting tube, be connected with geothermal vapour 4 in pipeline, the 3rd gateway of triple valve 3 is connected through the end of pure water steam line with pure water steam line control valve 2, the other end of pure water steam line control valve 2 is connected with gas storage tank 7, gas storage tank 7 is connected with steam generator 8 through pipeline, geothermal vapour pipe control valve 1, chain control loop 9 and pure water steam line control valve 2 connect through return, consist of chain response,
(2) deionized water 5 obtains pure water steam through steam generator 8 vaporizations, and pure water steam concentrates in gas storage tank 7;
(3) utilize chain control loop 9, open geothermal vapour pipe control valve 1, close pure water steam line control valve 2, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve 1, open pure water steam line control valve 2, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 2 times/hour, each endurance is 180 seconds, steam turbine for geothermal power generation power is 1MW, the initial steam pressure of geothermal vapour is 0.09MPa, throttle flow is 17.0t/h, the initial steam pressure of pure water steam is 0.10MPa.
Embodiment 2
A kind of method that suppresses steam turbine for geothermal power generation from scaling, the method comprises the following steps:
(1) steam turbine for geothermal power generation is connected with an end of triple valve through the geothermal vapour pipeline, the other end of triple valve is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve, geothermal vapour pipe control valve the other end connecting tube, be connected with geothermal vapour in pipeline, the 3rd gateway of triple valve is connected through the end of pure water steam line with pure water steam line control valve, the other end of pure water steam line control valve is connected with gas storage tank, gas storage tank is connected with steam generator through pipeline, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response,
(2) deionized water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, open geothermal vapour pipe control valve, close pure water steam line control valve, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve, open pure water steam line control valve, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 3 times/hour, each endurance is 120 seconds, steam turbine for geothermal power generation power is 1MW, the initial steam pressure of geothermal vapour is 0.09MPa, throttle flow is 17.0t/h, the initial steam pressure of pure water steam is 0.10MPa.
A kind of method that suppresses steam turbine for geothermal power generation from scaling, the method comprises the following steps:
(1) steam turbine for geothermal power generation is connected with an end of triple valve through the geothermal vapour pipeline, the other end of triple valve is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve, geothermal vapour pipe control valve the other end connecting tube, be connected with geothermal vapour in pipeline, the 3rd gateway of triple valve is connected through the end of pure water steam line with pure water steam line control valve, the other end of pure water steam line control valve is connected with gas storage tank, gas storage tank is connected with steam generator through pipeline, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response,
(2) advanced desalination water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, open geothermal vapour pipe control valve, close pure water steam line control valve, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve, open pure water steam line control valve, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 4 times/hour, each endurance is 90 seconds, steam turbine for geothermal power generation power is 1MW, the initial steam pressure of geothermal vapour is 0.09MPa, throttle flow is 17.0t/h, the initial steam pressure of pure water steam is 0.11MPa.
Embodiment 4
A kind of method that suppresses steam turbine for geothermal power generation from scaling, the method comprises the following steps:
(1) steam turbine for geothermal power generation is connected with an end of triple valve through the geothermal vapour pipeline, the other end of triple valve is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve, geothermal vapour pipe control valve the other end connecting tube, be connected with geothermal vapour in pipeline, the 3rd gateway of triple valve is connected through the end of pure water steam line with pure water steam line control valve, the other end of pure water steam line control valve is connected with gas storage tank, gas storage tank is connected with steam generator through pipeline, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response,
(2) deionized water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, open geothermal vapour pipe control valve, close pure water steam line control valve, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve, open pure water steam line control valve, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 6 times/hour, each endurance is 60 seconds, steam turbine for geothermal power generation power is 1MW, the initial steam pressure of geothermal vapour is 0.09MPa, throttle flow is 17.0t/h, the initial steam pressure of pure water steam is 0.11MPa.
Embodiment 5
A kind of method that suppresses steam turbine for geothermal power generation from scaling, the method comprises the following steps:
(1) steam turbine for geothermal power generation is connected with an end of triple valve through the geothermal vapour pipeline, the other end of triple valve is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve, geothermal vapour pipe control valve the other end connecting tube, be connected with geothermal vapour in pipeline, the 3rd gateway of triple valve is connected through the end of pure water steam line with pure water steam line control valve, the other end of pure water steam line control valve is connected with gas storage tank, gas storage tank is connected with steam generator through pipeline, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response,
(2) deionized water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, open geothermal vapour pipe control valve, close pure water steam line control valve, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve, open pure water steam line control valve, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 2 times/hour, each endurance is 360 seconds, steam turbine for geothermal power generation power is 3MW, the initial steam pressure of geothermal vapour is 0.17MPa, throttle flow is 25.5t/h, the initial steam pressure of pure water steam is 0.18MPa.
(1) steam turbine for geothermal power generation is connected with an end of triple valve through the geothermal vapour pipeline, the other end of triple valve is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve, geothermal vapour pipe control valve the other end connecting tube, be connected with geothermal vapour in pipeline, the 3rd gateway of triple valve is connected through the end of pure water steam line with pure water steam line control valve, the other end of pure water steam line control valve is connected with gas storage tank, gas storage tank is connected with steam generator through pipeline, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response,
(2) deionized water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, open geothermal vapour pipe control valve, close pure water steam line control valve, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve, open pure water steam line control valve, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 3 times/hour, each endurance is 240 seconds, steam turbine for geothermal power generation power is 3MW, the initial steam pressure of geothermal vapour is 0.17MPa, throttle flow is 25.5t/h, the initial steam pressure of pure water steam is 0.19MPa.
Embodiment 7
(1) steam turbine for geothermal power generation is connected with an end of triple valve through the geothermal vapour pipeline, the other end of triple valve is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve, geothermal vapour pipe control valve the other end connecting tube, be connected with geothermal vapour in pipeline, the 3rd gateway of triple valve is connected through the end of pure water steam line with pure water steam line control valve, the other end of pure water steam line control valve is connected with gas storage tank, gas storage tank is connected with steam generator through pipeline, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response,
(2) advanced desalination water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, open geothermal vapour pipe control valve, close pure water steam line control valve, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve, open pure water steam line control valve, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 4 times/hour, each endurance is 180 seconds, steam turbine for geothermal power generation power is 3MW, the initial steam pressure of geothermal vapour is 0.17MPa, throttle flow is 25.5t/h, the initial steam pressure of pure water steam is 0.20MPa.
(1) steam turbine for geothermal power generation is connected with an end of triple valve through the geothermal vapour pipeline, the other end of triple valve is connected through the end of geothermal vapour pipeline with geothermal vapour pipe control valve, geothermal vapour pipe control valve the other end connecting tube, be connected with geothermal vapour in pipeline, the 3rd gateway of triple valve is connected through the end of pure water steam line with pure water steam line control valve, the other end of pure water steam line control valve is connected with gas storage tank, gas storage tank is connected with steam generator through pipeline, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response,
(2) advanced desalination water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, open geothermal vapour pipe control valve, close pure water steam line control valve, pass into geothermal vapour in steam turbine for geothermal power generation, then close geothermal vapour pipe control valve, open pure water steam line control valve, pass into pure water steam in steam turbine for geothermal power generation, the number of times that geothermal vapour and pure water steam alternately pass into steam turbine for geothermal power generation is 6 times/hour, each endurance is 120 seconds, steam turbine for geothermal power generation power is 3MW, the initial steam pressure of geothermal vapour is 0.17MPa, throttle flow is 25.5t/h, the initial steam pressure of pure water steam is 0.20MPa.
According to different steam turbine for geothermal power generation and process parameter in embodiment 1-8, calculate the consumption at pure water steam, as shown in table 1.
Table 1 pure water steam consumption
Claims (3)
1. a method that suppresses steam turbine for geothermal power generation from scaling, is characterized in that, the method comprises the following steps:
(1) with steam turbine for geothermal power generation connecting tee valve one end, the other end of triple valve connects the geothermal vapour pipeline through geothermal vapour pipe control valve, the 3rd end of triple valve connects pure water steam line control valve, gas storage tank and steam generator successively, geothermal vapour pipe control valve, chain control loop and pure water steam line control valve connect through return, consist of chain response;
(2) pure water obtains pure water steam through the steam generator vaporization, and pure water steam concentrates in gas storage tank;
(3) utilize chain control loop, control geothermal vapour pipe control valve and pure water steam line control valve and open or close, geothermal vapour and pure water steam are alternately passed into to steam turbine for geothermal power generation.
2. a kind of method that suppresses steam turbine for geothermal power generation from scaling according to claim 1, is characterized in that, the number of times that the middle geothermal vapour of described step (3) and pure water steam alternately pass into steam turbine for geothermal power generation is 2-6 time/hour.
3. a kind of method that suppresses steam turbine for geothermal power generation from scaling according to claim 1, is characterized in that, in described step (3) geothermal vapour and pure water steam alternately pass into the time of steam turbine for geothermal power generation be 20-360 second/time.
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| CN104533542B (en) * | 2014-12-23 | 2016-06-29 | 青岛捷能汽轮机集团股份有限公司 | A kind of geothermal steam turbine and main inlet throttle-stop valve thereof |
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| CN1060352A (en) * | 1991-10-29 | 1992-04-15 | 四川电力科学试验研究所 | The cleaning method and the device of steam turbine silicon dirt |
| US6575711B1 (en) * | 1999-01-29 | 2003-06-10 | Thermodyn | Method and device for controlling a turbo-machine so as to limit clogging of the turbo-machine internal parts with impurities derived from a process gas |
| CN1705524A (en) * | 2004-02-16 | 2005-12-07 | 燃气涡轮效率股份有限公司 | Method and apparatus for cleaning a turbofan gas turbine engine |
| CN1924302A (en) * | 2006-09-15 | 2007-03-07 | 唐山三友化工股份有限公司 | Method for turbine washing with damp steam |
| CN101298841A (en) * | 2008-06-12 | 2008-11-05 | 秦皇岛首秦金属材料有限公司 | Blade descaling method for blast furnace gas remaining pressure power generation turbine |
-
2009
- 2009-06-09 CN CN 200910052779 patent/CN101922313B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1060352A (en) * | 1991-10-29 | 1992-04-15 | 四川电力科学试验研究所 | The cleaning method and the device of steam turbine silicon dirt |
| US6575711B1 (en) * | 1999-01-29 | 2003-06-10 | Thermodyn | Method and device for controlling a turbo-machine so as to limit clogging of the turbo-machine internal parts with impurities derived from a process gas |
| CN1705524A (en) * | 2004-02-16 | 2005-12-07 | 燃气涡轮效率股份有限公司 | Method and apparatus for cleaning a turbofan gas turbine engine |
| CN1924302A (en) * | 2006-09-15 | 2007-03-07 | 唐山三友化工股份有限公司 | Method for turbine washing with damp steam |
| CN101298841A (en) * | 2008-06-12 | 2008-11-05 | 秦皇岛首秦金属材料有限公司 | Blade descaling method for blast furnace gas remaining pressure power generation turbine |
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