CN102942269A - Concurrent boiler feed water treatment method for weak oxidation treatment and pH (potential of hydrogen) coordination control - Google Patents
Concurrent boiler feed water treatment method for weak oxidation treatment and pH (potential of hydrogen) coordination control Download PDFInfo
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Abstract
The invention discloses a concurrent boiler feed water treatment method for weak oxidation treatment and pH (potential of hydrogen) coordination control. The concurrent boiler water feed treatment method includes the steps of oxygen balance treatment and oxygen balance after-treatment. After oxygen balance, dissolved oxygen at an inlet of an economizer and dissolved oxygen at an inlet of an oxygen extractor are controlled to be 10-40 micrograms/L and 10-60 micrograms/L respectively, so that the oxygen balance state of a feed water system is kept. Besides, the pH value of feed water is coordinately controlled by adding ammonia according to the iron content change of a water vapor system, and a feed water and drainage system is ensured to be still in a passivation area under a low-oxygen condition. The pressure difference of a boiler is stable, the Fe content of the water vapor system is reduced, and the scaling rate of the boiler and the economizer is reduced by more than 80%. Compared with an AVT (all volatile treatment) (O) method, the method has the advantages that the pH value of the feed water is reduced, the periodic water production amount of a condensate treatment mixed bed is increased by more than 50%, water consumption, the amount of regenerative acid and alkaline and regenerative wastewater discharge amount are greatly reduced, oxidation film grains on the surfaces of the economizer and a water-cooling wall tube are smaller and more compact, and the influence of traditional OT treatment on steam scale is avoided.
Description
Technical field
The present invention relates to the feedwater treatment method of one through boiler, can effectively prevent from flowing accelerated corrosion and containment high temperature scale, be specially adapted to the fuel-burning power plant one through boiler to water treatment.
Background technology
Along with the composition optimizes of China's thermal power generation unit, the super (super-) critical one through boiler is applied to the fuel-burning power plant more and more.One through boiler requires feed water quality high, and its condensed water requires 100% to carry out precision processing.The feedwater treatment method of one through boiler has reductibility entirely volatilize processing [AVT (O)] and the oxygenation of processing [AVT (R)], oxidisability that entirely volatilize to process [OT] etc. three kinds.
Although it is better that the unit water and steam quality that full volatilization processes is implemented in oiler feed, exist that boiler pressure reduction is high with scaling rate, condensate fine is processed short, the turbine low pressure cylinder zone of transition corrosion of the mixed bed cycle of operation and high adding leaks and relevant water feeding system valve blockage etc. affects the problem of thermoelectric generator group leader cycle safety and economic operation.The basic reason of the problems referred to above is that oiler feed volatilizees entirely that there are the accelerated corrosion of comparatively significantly flowing (Flow Accelerated Corrosion is called for short FAC) in feedwater and draining system when processing, be embodied in feed water and hydrophobic in Fe content higher.
The oiler feed oxygenation is processed the iron level that can reduce in the steam, effectively reduces boiler feed water system corrosion of metal and mobile accelerated corrosion.The principle of feed water oxygenation is: under the feed water oxygenation operating mode, because the constantly equably oxygen supply to the metallic surface, metallic surface still keeps stable, the complete Fe of one deck
3O
4In stretch layer, and pass through Fe
3O
4Diffuse out ferrous ion (Fe in the micro channel
2+) enter the liquid phase layer, wherein a part directly generates by Fe
3O
4The epitaxial film that crystal grain forms.Fe
3O
4Layer is micropore shape (1～15% hole), because the Fe that moves is spread in the constantly equably oxygen supply to the metallic surface by micropore
2+In the hole or on the oxide film top layer oxidation occuring, generates ferric oxide (Fe
2O
3) or hydrated ferric oxide (FeOOH forms α-Fe with ageing
2O
3), be deposited on Fe
3O
4In the micropore of layer or the space of particle, sealed the aperture of Z 250 oxide film, thereby reduced Fe
2+Diffusion and the speed of oxidation, consequently at the steel Surface Creation form compact and stable " Fe
2O
3+ Fe
3O
4The double shielding film ", this protective layer is finer and close, stable, the ability that hinders the further dissolved corrosion of matrix arranged, thereby effectively contained mobile accelerated corrosion, shows as the iron level that greatly reduces in the water-steam system.Therefore, super (super-) critical one through boiler feed water oxygenation is processed security and the economy greatly improved unit, is considered to one of the most effective feedwater treatment method.Yet feed water oxygenation is processed and is had the problem that may cause the steam dissolved oxygen too high, thereby constructional feature, layered structure, empty quantity and the degree etc. of steam oxidation skin are exerted an influence:
(1) the oxygenation operating mode can change oxide skin surface layer grain structure, promotes surface layer grain by Fe
3O
4To Fe
2O
3Transform, it is more responsive to cause crystal grain to peel off;
(2) obvious Fe appears in the skin of oxygenation operating mode accelerating oxidation skin
2O
3Layer, for austenitic steel, Fe
2O
3The existence of layer, the layered structure of oxide skin is more complicated with making, and thermal stresses is more remarkable, thus the peeling off of accelerating oxidation skin.
(3) too high dissolved oxygen in the steam is carried by promoting vacancy defect to accelerate outer field material on the one hand, thus the velocity slope of aggravating the material diffusion of inside and outside layer, the appearance in aggravation cavity and running through, and cause the process of peeling off of oxide skin to be accelerated.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of weak oxide and process the feedwater treatment method of coordinating control with pH.
The present invention realizes by the following technical solutions:
Guaranteeing that feedwater contains under the prerequisite an amount of, effectively dissolved oxygen, controlling too high dissolved oxygen, to enter steam system consistent when processing with full volatility with the dissolved oxygen levels of keeping steam system, under the condition that the feedwater weak oxide is processed, suitably reduce feedwater pH value simultaneously.Relatively traditional oxygenation is processed (OT) technique, has kept lower economizer import dissolved oxygen, higher feedwater pH, the effect of optimization of taking into account to reach many-side.
The present invention includes oxygen balance processing and two steps of oxygen balance aftertreatment, wherein oxygen balance is processed, and is that advanced horizontal high voltage water feeding system oxygen balance is processed, after carry out the oxygen balance of low pressure feed water system and process.Its reason is, the low pressure feed water system is subjected to the impact of condensed water dissolved oxygen content, substantially be in the oxidisability state, the process of feed water oxygenation is very fast, and the high-pressure feed water system oxygenation cycle is longer, generally do not wait at several days to tens of days, mainly relevant with the dirt amount in the front economizer of oxygenation and the water wall tube, so water feeding system oxygen balance process mainly is the oxygen balance process of high-pressure feed water system.The oxygen balance process of high-pressure feed water system comprises oxygenation transformation stage and oxidation-stabilized stage.
The oxygen point that adds of high-pressure feed water of the present invention system is arranged on the deoxygenator outlet, and the oxygen balance state of high-pressure feed water system is judged in the variation of importing and exporting dissolved oxygen by detecting economizer.Be dependency when the generation hop of economizer import dissolved oxygen and with oxygen-adding amount, be that economizer import dissolved oxygen total amount and oxygenation total amount are substantially suitable, and change with the variation of oxygen-adding amount, wherein, economizer import dissolved oxygen total amount equals feedwater flow and multiply by economizer import dissolved oxygen content monitor value, namely think this monitoring point and add system between the oxygen point and finished oxygenation and transform, suitably reduce oxygen-adding amount this moment and change the oxidation-stabilized stage over to and transform with the oxygenation of finishing follow-up high-pressure feed water system; Be dependency when the generation hop of economizer exit dissolved oxygen and with oxygen-adding amount, namely economizer exit dissolved oxygen total amount is a little less than the oxygenation total amount, and changes with the variation of oxygen-adding amount, thinks that namely whole high-pressure feed water system has been in the oxygen balance state.
The dependency of oxygen-adding amount and economizer exit dissolved oxygen is decided (Fig. 1) by 2 flow processs in therrmodynamic system.The water feeding system pipeline will consume certain dissolved oxygen for transforming inner wall oxide film behind the feed water oxygenation, economizer exit is positioned at after the feed water oxygenation point, in this project implementation process, dissolved oxygen content by the control economizer exit is controlled the feed water oxygenation amount, enters steam system to prevent too high dissolved oxygen.The oxygenation transformation stage is because the oxygen amount that the conversion of water feeding system inner wall oxide film consumes is larger, so the feed water oxygenation amount is corresponding higher; In the oxidation-stabilized stage, the oxygen that feedwater adds is mainly used in the oxidation membrane repair, and consumption is smaller, and corresponding feed water oxygenation amount is less.Oxygenation transformation stage and oxidation-stabilized stage are all controlled the feed water oxygenation amount by control economizer exit dissolved oxygen content.
High-pressure feed water system's oxygenation transformation stage economizer import dissolved oxygen of the present invention (OD) is controlled at below the 80 μ g/L; Be controlled between the 10-60 μ g/L at oxidation-stabilized stage economizer import dissolved oxygen, optimum range is 20-30 μ g/L.Oxygen-adding amount is taked automatic control, automatically adjusts the oxygen flow rate adjusting valve aperture according to feedwater flow, makes oxygen content be controlled at 20-30 μ g/L, and online dissolved oxygen meter continuous monitoring is confirmed by feeding water.
The oxygen point that adds of low pressure feed water of the present invention system is arranged on the precision processing outlet.Dissolved oxygen by the import of monitoring deoxygenator changes the oxygen balance situation of judging the low pressure feed water system.When deoxygenator import dissolved oxygen content raises rapidly, and present obvious dependency with the condensed water oxygen-adding amount, be that deoxygenator import dissolved oxygen is suitable with the condensed water oxygen-adding amount than condensed water dissolved oxygen increasing amount, and change with the variation of oxygen-adding amount, this explanation low pressure feed water system has been in the oxygen balance state.
In the oxygen balance treating processes, by ammonification, pH is between 9.3 ~ 9.4 in the control feedwater.
The present invention by regulating the dissolved oxygen of feed water oxygenation amount control steam, is controlled at 10-40 μ g/L with economizer import dissolved oxygen after water feeding system is finished oxygen balance, optimum control is at 10-25 μ g/L; Deoxygenator import dissolved oxygen is controlled at 10-60 μ g/L, and optimum control is at 10～30 μ g/L; This moment, the steam dissolved oxygen was below 10 μ g/L, and is suitable during to water treatment with full volatility, the impact that can effectively avoid feed water oxygenation that high temperature scale is peeled off.
The present invention is during feed water oxygenation is processed whole process, and economizer import dissolved oxygen and pH value are coordinated control.By Fe-H
2O system current potential sketch can find out that the feedwater oxidisability is stronger, and namely redox potential is higher, and feedwater pH can control lowlyer, still makes metal be in passivation region, reaches the rot-resistant purpose.This project adopts the weak oxide treatment technology, so pH value can reduce, but adjustment can not be excessively low, to guarantee the rot-resistant effect.The height of feedwater pH value control is relevant with feed water oxygenation amount (or power of feedwater oxide treatment), and the control of the pH value that namely feeds water has coordinative role with the power of feedwater oxidisability.After feed water oxygenation is processed, the redox potential of water-steam system improves, guaranteeing that water-steam system is under the prerequisite in the passivation region, the pH that will feed water is controlled between the 9.0-9.2, pH 9.3-9.4 with full volatility during to water treatment compares, can reduce by 50% ammonia residual, the condensate fine treatment cycle water yield processed improves more than 50%.
The advantage that the present invention has:
(1) effectively keep boiler pressure reduction stable.
(2) whole water-steam system Fe content significantly reduces, and feedwater Fe content is by AVT(O) 5-10 μ g/L when processing is down to below the 1 μ g/L.
(3) boiler, economizer scaling rate are than AVT(O) descend more than 80% matting cycle of prolonged boiler greatly when processing.
(4) feedwater pH value reduces, and the Condensate Treatment with Mixed Resin Bed water production in periodic mode increases more than 50%, and its self water consumption, regeneration all significantly reduce with soda acid amount and regenerative wastewater quantity discharged.
(5) economizer and water wall tube surface film oxide crystal grain are less, and intergranule can effectively prevent the generation of mobile accelerated corrosion in conjunction with tightr, smooth.
(6) avoided traditional OT processing on the impact of steam oxidation skin structure.Take economizer import dissolved oxygen and pH value to coordinate control and checked that steam oxidation intracutaneous skin was still tightr, with AVT(O in rear 1 year) the processing basic simlarity, and after traditional OT processing, between the steam oxidation intracutaneous skin more cavity is arranged, easily peel off, booster occurs when serious.
Economic benefit of the present invention and social benefit:
Take a 600MW Supercritical once-through boiler as example, with AVT(O) compare to water treatment, chemical cleaning engineering consumption can reduce 66.7 ten thousand yuan/year after the invention process; The de-mineralized water consumption can reduce 19.2 ten thousand yuan/year, and the chemical consumption can reduce 42.5 ten thousand yuan/year, reduces simultaneously the rear generated energy that increases of system's power consumption, therrmodynamic system loss and turnaround prolongation, and economic benefit is obvious.Simultaneously, bring the sound social environment benefit because reducing discharging of waste liquid, the pollution of deoxygenator exhaust heat and sound pollution.
Description of drawings
Fig. 1 feed water oxygenation point synoptic diagram;
The variation (1) of steam Fe content in Fig. 2 high-pressure feed water system oxygen balance process;
The variation (2) of steam Fe content in Fig. 3 high-pressure feed water system oxygen balance process;
The variation of dissolved oxygen in Fig. 4 high-pressure feed water system oxygen balance process;
Steam dissolved oxygen control after the oxygen balance of Fig. 5 water feeding system transforms;
Fig. 6 pH and steam Fe content relation that feeds water;
Fig. 7 Fe-H
2O system current potential sketch;
Water wall tube surface film oxide microscopic pattern figure when Fig. 8 AVT(O) processing;
Water wall tube surface film oxide microscopic pattern figure when Fig. 9 economizer import dissolved oxygen and pH value are coordinated control;
Figure 10 AVT(O) processes steam oxidation skin hierarchical diagram after a year;
Steam oxidation skin hierarchical diagram after Figure 11 economizer import dissolved oxygen and pH value are coordinated to control 1 year;
Figure 12 tradition OT processes steam oxidation skin hierarchical diagram after a year
Embodiment
Below in conjunction with accompanying drawing the present invention's application is described in further details.
Application example: certain 600MW of power plant supercritical unit.
According to relevant country and industry standard, the key parameters such as the water and steam quality of supercritical once-through boiler, the dirty complexion of being heated amount can be implemented the feed water oxygenation processing after reaching the specified standards value.This 600MW supercritical DC group puts into operation and namely takes soon AVT (O) to water treatment.Carried out move assessment to unit in May, 2010, and assessment result shows that its water and steam quality is in good level, and economizer and water wall dirt amount are higher than the front limit value (200g/m that needs pickling of feed water oxygenation
2), boiler has been done matting, the requirement of processing to satisfy feed water oxygenation.Feed water oxygenation point as shown in Figure 1.
1) the oxygen balance process of high-pressure feed water system
The oxygen point that adds of high-pressure feed water system is deoxygenator outlet (see figure 1), and the monitoring emphasis in this stage is that economizer is imported and exported the oxygen quantitative change.The initial stage oxygen-adding amount is namely controlled economizer import dissolved oxygen and is lower than 80 μ g/L, is the impact of reduce on steam system, and economizer import dissolved oxygen majority is lower than 25 μ g/L during actual enforcement.
Such as Fig. 4, economizer import dissolved oxygen is low level before the oxygenation initial stage is in oxygenation always, after feed water oxygenation is implemented a week, obvious hop occurs in economizer import dissolved oxygen, promotion to 80 μ g/L, explanation adds oxygen point (deoxygenator outlet) to the water feeding system of economizer import and has finished conversion in early stage oxygenation process.suitably turn down add oxygen flow after, economizer import dissolved oxygen can be stable at 10～60 μ g/L substantially.Along with the propelling of water feeding system oxygen balance, the Fe content of deoxygenator outlet, economizer import and main steam all has and more obviously reduces (see figure 2).In enforcement oxygenation one month, this three Fe content all is down to below the 1.0 μ g/L, HP heater drainage and also decrease to some degree (see figure 3) of condensed water Fe content, the successful that feed water oxygenation is processed.
Before the economizer import water feeding system transform complete after, oxygenation is processed and is entered stable operation stage to finish the whole conversions to follow-up high-pressure feed water system.Feed water oxygenation is implemented approximately after two months steadily, economizer exit dissolved oxygen generation hop (see figure 4), and the hop amount is directly proportional with the feed water oxygenation amount, shows that economizer exit dissolved oxygen and feed water oxygenation amount present obvious dependency, judges that whole high-pressure feed water system has finished conversion.
2) the oxygen balance process of low pressure feed water system
After the high-pressure feed water system reached oxygen balance, the oxygenation of implementing the low pressure feed water system transformed.Add oxygen point and be located at the precision processing outlet.The Monitoring and Controlling emphasis in this stage is deoxygenator import dissolved oxygen, and changes the oxygen balance situation of judging the low pressure feed water system by observing it.After implementing condensate fine processing outlet oxygenation, owing to be subjected to condensed water dissolving effect of oxygen, deoxygenator import dissolved oxygen content raises rapidly, and presents obvious dependency with the condensed water oxygen-adding amount, judges that the low pressure feed water system has been in the oxygen balance state.
3) control of dissolved oxygen after the water feeding system oxygen balance is finished
After the water feeding system oxygen balance is finished, control economizer import and deoxygenator import dissolved oxygen be in respectively 10～40 μ g/L and and 10～60 μ g/L, to keep the oxygen balance state of water feeding system, under this state, dissolved oxygen is lower than 10 μ g/L in main steam and the reheated steam.Unit steam dissolved oxygen as shown in Figure 5.
4) control of feedwater pH value
According to DL/T850.4-2004, after supercritical unit was implemented the feed water oxygenation processing, economizer import dissolved oxygen was controlled at 30～300 μ g/L, and feedwater pH value is controlled at 8.0～9.0 scopes, and feedwater pH value should be treated with a certain discrimination according to the difference of feed water oxygenation processing policy.Under the condition of this unit water feeding system weak oxide, for improving the safety margin of whole water-steam system, its corresponding pH should not control excessively lowly.Therefore change according to the water-steam system iron level in during the invention process, the HP heater drainage iron level that particularly is in weak link changes, and pH coordinates control to feedwater, guarantees that feedwater and draining system still are in passivation region under hypoxia condition.
Feedwater pH adjusting stage steam monitoring result as shown in Figure 6.After feedwater pH value is down to 9.0 ~ 9.2 by 9.3 ~ 9.4, steam Fe content is without considerable change, feedwater, main steam Fe remains on below the 1 μ g/L substantially, and HP heater drainage and condensed water Fe content are not in rising trend yet, proves the corrosion that the present invention can the establishment water-steam system.
Fig. 8 is AVT(O) water wall tube surface film oxide microscopic pattern figure when processing, crystal grain is larger, coarse; Fig. 9 is the present invention water wall tube surface film oxide microscopic pattern figure when adopting economizer import dissolved oxygen and pH value to coordinate control, and crystal grain is less, fine and close.
Figure 10 is AVT(O) process steam oxidation skin hierarchical diagram after a year, ectonexine is tightr; Figure 11 is steam oxidation skin hierarchical diagram after economizer import dissolved oxygen of the present invention and pH value are coordinated to control a year, and ectonexine is tightr; Figure 12 tradition OT processes steam oxidation skin hierarchical diagram after a year, and line has been run through in the ectonexine cavity, easily peels off to cause booster.
The check point of water ph value, feedwater Fe content of giving of the present invention all is located at economizer ingress.
Claims (7)
1. a weak oxide is processed the one through boiler feedwater treatment method of coordinating control with pH, comprise and it is characterized in that, comprise oxygen balance processing and two steps of oxygen balance aftertreatment, after the oxygen balance, pass through oxygenation, control economizer import and deoxygenator import dissolved oxygen are in respectively 10～40 μ g/L and 10～60 μ g/L, to keep the oxygen balance state of water feeding system; Simultaneously, change according to the water-steam system iron level, by ammonification, pH coordinates control to feedwater, guarantees that feedwater and draining system still are in passivation region under hypoxia condition.
2. weak oxide as claimed in claim 1 is processed the one through boiler feedwater treatment method of coordinating control with pH, it is characterized in that, after the oxygen balance, by oxygenation, control economizer import and deoxygenator import dissolved oxygen are in respectively 10～25 μ g/L and and 10～30 μ g/L.
3. weak oxide as claimed in claim 1 is processed the one through boiler feedwater treatment method of coordinating control with pH, it is characterized in that, after the oxygen balance, by ammonification, pH regulates between 9.0 ~ 9.2 to feedwater.
4. weak oxide as claimed in claim 1 is processed the one through boiler feedwater treatment method of coordinating control with pH, it is characterized in that, changes according to the HP heater drainage iron level that is in weak link, and pH coordinates control to feedwater.
5. weak oxide as claimed in claim 1 is processed the one through boiler feedwater treatment method of coordinating control with pH, it is characterized in that, described oxygen balance is processed, and is that advanced horizontal high voltage water feeding system oxygen balance is processed, after carry out the oxygen balance of low pressure feed water system and process;
The oxygen balance process of high-pressure feed water system comprises oxygenation transformation stage and oxidation-stabilized stage:
The oxygen point that adds of high-pressure feed water system is arranged on the deoxygenator outlet, the oxygen balance state of high-pressure feed water system is judged in the variation of importing and exporting dissolved oxygen by detecting economizer, be dependency when the generation hop of economizer import dissolved oxygen and with oxygen-adding amount, and change with the variation of oxygen-adding amount, namely think this monitoring point and add system between the oxygen point and finished oxygenation and transform, suitably reduce oxygen-adding amount this moment and change the oxidation-stabilized stage over to and transform with the oxygenation of finishing follow-up high-pressure feed water system; Be dependency when the generation hop of economizer exit dissolved oxygen and with oxygen-adding amount, and change with the variation of oxygen-adding amount, think that namely whole high-pressure feed water system has been in the oxygen balance state;
The oxygen point that adds of low pressure feed water system is arranged on the precision processing outlet, changes the oxygen balance situation of judgement low pressure feed water system by the dissolved oxygen of monitoring deoxygenator import; When deoxygenator import dissolved oxygen content raises rapidly, and present obvious dependency with the condensed water oxygen-adding amount, and change with the variation of oxygen-adding amount, this explanation low pressure feed water system has been in the oxygen balance state;
In whole oxygen balance treating processes, by ammonification, pH is between 9.3 ~ 9.4 in the control feedwater, guarantees that feedwater and draining system are in passivation region.
6. weak oxide as claimed in claim 5 is processed the one through boiler feedwater treatment method of coordinating control with pH, it is characterized in that high-pressure feed water system oxygenation transformation stage economizer import dissolved oxygen is controlled at below the 80 μ g/L; Be controlled between the 10-60 μ g/L at oxidation-stabilized stage economizer import dissolved oxygen.
7. weak oxide as claimed in claim 5 is processed the one through boiler feedwater treatment method of coordinating control with pH, it is characterized in that, is controlled at 20-30 μ g/L at oxidation-stabilized stage economizer import dissolved oxygen.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387292A (en) * | 2013-06-08 | 2013-11-13 | 宁波富仕达电力工程有限责任公司 | Boiler supply water oxygenation process |
| CN104326547A (en) * | 2014-10-23 | 2015-02-04 | 国家电网公司 | High-pressure water supply micro-aerobic accurate control method and high-pressure water supply micro-aerobic accurate control device for coal-fired unit boiler |
| CN104529015A (en) * | 2015-01-20 | 2015-04-22 | 河南合众电力技术有限公司 | Anticorrosion treatment method for boiler drainage system of coal-fired unit |
| CN108710315A (en) * | 2018-05-22 | 2018-10-26 | 江苏国信靖江发电有限公司 | Control method, system, equipment and the storage medium of mortifier injection |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103387292A (en) * | 2013-06-08 | 2013-11-13 | 宁波富仕达电力工程有限责任公司 | Boiler supply water oxygenation process |
| CN104326547A (en) * | 2014-10-23 | 2015-02-04 | 国家电网公司 | High-pressure water supply micro-aerobic accurate control method and high-pressure water supply micro-aerobic accurate control device for coal-fired unit boiler |
| CN104326547B (en) * | 2014-10-23 | 2015-12-09 | 国家电网公司 | A kind of coal unit Boiler High Pressure feeds water micro-oxygen accurate control method and device |
| CN104529015A (en) * | 2015-01-20 | 2015-04-22 | 河南合众电力技术有限公司 | Anticorrosion treatment method for boiler drainage system of coal-fired unit |
| CN104529015B (en) * | 2015-01-20 | 2016-06-08 | 河南合众电力技术有限公司 | A kind of coal unit boiler draining system method for anticorrosion treatment |
| CN108710315A (en) * | 2018-05-22 | 2018-10-26 | 江苏国信靖江发电有限公司 | Control method, system, equipment and the storage medium of mortifier injection |
| CN108710315B (en) * | 2018-05-22 | 2020-04-07 | 江苏国信靖江发电有限公司 | Method, system, device and storage medium for controlling injection of inhibitor |
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Application publication date: 20130227 |