CN102777884A - Washing method of power station boiler temperature reducing water system and washing pipeline connection structure - Google Patents
Washing method of power station boiler temperature reducing water system and washing pipeline connection structure Download PDFInfo
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- CN102777884A CN102777884A CN2012102767860A CN201210276786A CN102777884A CN 102777884 A CN102777884 A CN 102777884A CN 2012102767860 A CN2012102767860 A CN 2012102767860A CN 201210276786 A CN201210276786 A CN 201210276786A CN 102777884 A CN102777884 A CN 102777884A
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- desuperheating water
- electrically operated
- station boiler
- operated gate
- flushing
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Abstract
The invention discloses a washing method of a power station boiler temperature reducing water system and a washing pipeline connection structure. The washing method and the structure comprise a power station boiler temperature reducing water system. The method includes first increasing a temporary communication pipe on the power station boiler temperature reducing water system. The temporary communication pipe is located between two motor-driven doors connecting a temperature reducing water connection tank and a temperature reducing water pipeline of a temperature reducer. After the temporary communication pipe is connected, the washing steps comprise first way water washing, second way water washing and third way steam back washing. The washing method and the structure ensure that all temperature reducing water systems can be washed by a simple temporary system and the operation mode and ensure washing flow quantity and washing effect due to the fact that the inner diameter of a temporary pipe is larger than the inner diameter of the temperature reducing water pipeline.
Description
Technical field
The invention discloses the purging method and the flushing line syndeton of a kind of station boiler desuperheating water system, belong to flushing of station boiler water and steam flush technical field.
Background technology
Therefore power boiler tubes must adopt the method for Chemical cleaning, demineralized water flushing or steam flush will be with foreign material and corrosion thing to remove according to conduit types before the complete startup of unit owing in manufacturing, transportation and installation process, can have a large amount of foreign material and corrosion thing.The desuperheating water system of station boiler is because the problem of system layout; Can't after installation, carry out Chemical cleaning; Nor the demineralized water or the steam that can will wash the desuperheating water system enter attemperator (6), otherwise a large amount of foreign material will get into superheater system thereupon, influence boiler safety.The part engineering is cleaned the desuperheating water pipeline before installation; But nonetheless; Because installing back to unit starting, pipeline also has a very long time (generally having 3～4 months); Pipeline can contact with air inevitably during this period of time, thereby produces the corrosion thing once more, and pipeline also often has residue when installing and is retained in the pipeline.So in order to remove these foreign material, station boiler desuperheating water pipeline must clean before the desuperheating water system formally puts into operation completely.
The general purging method of adopting of station boiler desuperheating water system at present has two kinds: method one is the flushing of whole process using water; Promptly before attemperator 6, break off formal pipeline; Be connected to the safe place with temporary pipeline; Start feed pump 1, the whole desuperheating water of demineralized water process system to the temporary pipeline of high pressure is discharged; Method two is that one section system adopts the water flushing, and one section system adopts steam flush, that is: a. feed pump 1 is exported to 3 sections of desuperheating water headers and adopts the water flushing, and flushing water is from desuperheating water header drain pipe 8 row's trenches; B. attemperator 6 to desuperheating water header adopts the steam backwash for 3 sections, utilizes the steam that produces after the ignition of the boiler to fall to dash to desuperheating water header 3 from attemperator 6, and last steam is from desuperheating water header drain pipe 8 row's trenches.
Find to have very big drawback in the former application of two kinds of purging methods of above-mentioned common employing; Method one can't be washed attemperator 6, attemperator structure more complicated, and desuperheating water spout wherein is again a loose structure; Therefore the manufacturing of attemperator processing legacy is more; If do not obtain good flushing, these foreign material of leaving over will get into the boiler high temperature heating surface successively after the desuperheating water system put into operation, and brought hidden danger to unit safety operation.Though method two has solved the problem that method one exists, make whole desuperheating water system all obtain flushing, have that developing result is bad, the developing cost problem of higher; Its former because: 1, the discharging of demineralized water or the steam of flushing all is to drain into trench through desuperheating water header drain pipe; And desuperheating water header drain pipe internal diameter has only 16～24mm; Much smaller than the desuperheating water internal diameter of the pipeline (generally 45～80mm); Cause flushing flow rate to be severely limited, thereby the momentum that causes washing is not enough, a lot of attachments can't develop from the desuperheating water system.2, steam falls to dash to desuperheating water header 3 from attemperator 6, and last steam is long from the pipeline of desuperheating water header drain pipe 8 its processes of row's trench, for satisfying the steam pressure requirement, just needs to increase boiler combustion time, increase coal consumption.
If the desuperheating water system can't rinse well; Then after the desuperheating water system formally puts into operation; Can cause foreign material to get into boiler high temperature heating surface or steam turbine; Cause that steam quality worsens, can cause the damage of boiler high temperature heating surface overtemperature tube burst or turbine blade when serious, bring the economic loss of units up to a million.
Summary of the invention
The problem that the present invention will solve is: a kind of purging method and flushing line syndeton of simple in structure, developing result good, cost is low station boiler desuperheating water system are provided, to overcome the deficiency of prior art.
Technical scheme of the present invention: the purging method of station boiler desuperheating water system; It comprises station boiler desuperheating water system; This method is in station boiler desuperheating water system, to increase interim communicating pipe earlier, and interim communicating pipe is between two Electrically operated gate of the desuperheating water pipeline that connects desuperheating water header and attemperator; Its rinsing step comprises after connecting interim communicating pipe:
The flushing of first via water: water is by feed pump → desuperheating water house steward Electrically operated gate → desuperheating water header → desuperheating water header drain pipe → hydrophobic manually operated door → row's trench;
The flushing of the second road water: close second Electrically operated gate before the flushing, water is by feed pump → desuperheating water house steward Electrically operated gate → desuperheating water header → first Electrically operated gate → interim pipe → row's trench;
Third Road steam backwash: close first Electrically operated gate before the flushing, steam → attemperator → second Electrically operated gate → interim pipe → row's atmosphere.
The caliber of interim communicating pipe is greater than the caliber of desuperheating water pipeline.
The flushing of first via water is 10～20 minutes with the time of the second road water flushing; The number of times of each road flushing is 2 times.
The steam pressure of Third Road steam backwash is 3.8-4.2MPa.
The time of steam backwash is 10-20 minute, and washing time is twice.
The flushing line syndeton of station boiler desuperheating water system; It comprises desuperheating water header and attemperator in the station boiler desuperheating water system equipment; The desuperheating water header is connected through the desuperheating water pipeline with attemperator; On the desuperheating water pipeline, be provided with first Electrically operated gate and second Electrically operated gate, between first Electrically operated gate and second Electrically operated gate, be connected with interim communicating pipe.
Compared with prior art; The present invention is through a kind of simple temporary system and mode of operation, can guarantee that whole desuperheating water system all obtains flushing, and since interim bore greater than the desuperheating water bore; So also guaranteed the flow of flushing, thereby ensured developing result.Prior art can not guarantee well that the desuperheating water system obtains all, effectively flushing; Cause foreign material to get into boiler high temperature heating surface or steam turbine easily; Cause that steam quality worsens; Can cause the damage of boiler high temperature heating surface overtemperature tube burst or turbine blade when serious, bring the economic loss of units up to a million.Therefore the present invention can bring good safety benefit to fired power generating unit, has the meaning of popularization.
Description of drawings
Fig. 1 is a structural representation of the present invention.
The specific embodiment
The embodiment of the invention: the main composition equipment of station boiler desuperheating water system is: feed pump 1, desuperheating water house steward Electrically operated gate 2, desuperheating water header 3, first Electrically operated gate 4, second Electrically operated gate 5, attemperator 6, desuperheating water header drain pipe 8 and hydrophobic manually operated door 9.The prerequisite that the present invention realizes is in station boiler desuperheating water system, to increase interim communicating pipe earlier, interim communicating pipe 7 between first Electrically operated gate 4, second Electrically operated gate 5, select for use communicating pipe 7 temporarily caliber need caliber greater than the desuperheating water pipeline; First Electrically operated gate 4, second Electrically operated gate 5 are positioned on the desuperheating water pipeline that connects desuperheating water header 3 and attemperator 6; The back is installed interim communicating pipe 7 just can realizes the flushing of station boiler desuperheating water system by following step.
Its rinsing step comprises after connecting interim communicating pipe:
The flushing of first via water: water is by feed pump 1 → desuperheating water house steward Electrically operated gate 2 → desuperheating water header 3 → desuperheating water header drain pipe 8 → hydrophobic manually operated door 9 → row's trench;
The second road water flushing: close second Electrically operated gate 5 before the flushing, water is by feed pump 1 → desuperheating water house steward Electrically operated gate 2 → desuperheating water header 3 → the first Electrically operated gate 4 → manage 7 → row trench temporarily;
The flushing of first via water with the corresponding operating procedure of the second road water flushing is:
A. the hydrophobic manually operated door 9 of standard-sized sheet desuperheating water house steward Electrically operated gate 2 and desuperheating water header 3;
B. first Electrically operated gate 4 and second Electrically operated gate 5 keep shut;
C. start feed pump 1, improve feed pressure flushing 10～20 minutes, repeat said process 2 times;
D. close hydrophobic manually operated door 9, slowly open Electrically operated gate 4, until standard-sized sheet;
E. improve feed pressure flushing 10～20 minutes, close Electrically operated gate 4 gradually;
F. repeat said process 2 times;
Carry out the backwash of Third Road steam after accomplishing above-mentioned steps: close first Electrically operated gate 4 before the flushing, steam → attemperator 6 → the second Electrically operated gate 5 → temporarily manage 7 → row atmosphere.
Third Road steam backwash operation step is:
A. desuperheating water house steward Electrically operated gate 2 keeps shut;
B. Electrically operated gate 4 keeps shut with Electrically operated gate 5;
C. ignition of the boiler, steam pressure rises to 3.8-4.2MPa;
D. slowly open Electrically operated gate 5, until standard-sized sheet;
E. keep steam pressure flushing 10～20 minutes, close Electrically operated gate 5 gradually;
F. repeat said process 2 times.
Claims (7)
1. the purging method of a station boiler desuperheating water system; It comprises station boiler desuperheating water system; It is characterized in that: this method is in station boiler desuperheating water system, to increase interim communicating pipe earlier, is positioned at communicating pipe (7) between two Electrically operated gate of the desuperheating water pipeline that connects desuperheating water header (3) and attemperator (6) temporarily; Its rinsing step comprises after connecting interim communicating pipe:
The flushing of first via water: water is by feed pump (1) → desuperheating water house steward Electrically operated gate (2) → desuperheating water header (3) → desuperheating water header drain pipe (8) → hydrophobic manually operated door (9) → row's trench;
The flushing of the second road water: close second Electrically operated gate (5) before the flushing, water is by feed pump (1) → desuperheating water house steward Electrically operated gate (2) → desuperheating water header (3) → first Electrically operated gate (4) → interim pipe (7) → row's trench;
Third Road steam backwash: close first Electrically operated gate (4) before the flushing, steam → attemperator (6) → second Electrically operated gate (5) → interim pipe (7) → row's atmosphere.
2. the purging method of station boiler desuperheating water according to claim 1 system is characterized in that: the caliber of interim communicating pipe (7) is greater than the caliber of desuperheating water pipeline.
3. the purging method of station boiler desuperheating water according to claim 1 system is characterized in that: the flushing of first via water is 10～20 minutes with the time of the second road water flushing; The number of times of each road flushing is 2 times.
4. the purging method of station boiler desuperheating water according to claim 1 system, it is characterized in that: the steam pressure of Third Road steam backwash is 3.8-4.2MPa.
5. the purging method of station boiler desuperheating water according to claim 4 system, it is characterized in that: the time of steam backwash is 10-20 minute, washing time is twice.
6. the flushing line syndeton of a station boiler desuperheating water system; It comprises desuperheating water header (3) and attemperator (6) in the station boiler desuperheating water system equipment; Desuperheating water header (3) is connected through the desuperheating water pipeline with attemperator (6); On the desuperheating water pipeline, be provided with first Electrically operated gate (4) and second Electrically operated gate (5), it is characterized in that: between first Electrically operated gate (4) and second Electrically operated gate (5), be connected with interim communicating pipe (7).
7. the flushing line syndeton of station boiler desuperheating water according to claim 6 system is characterized in that the caliber of the caliber of interim communicating pipe (7) greater than the desuperheating water pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012102767860A CN102777884A (en) | 2012-08-06 | 2012-08-06 | Washing method of power station boiler temperature reducing water system and washing pipeline connection structure |
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| CN2012102767860A CN102777884A (en) | 2012-08-06 | 2012-08-06 | Washing method of power station boiler temperature reducing water system and washing pipeline connection structure |
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| CN102777884A true CN102777884A (en) | 2012-11-14 |
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| CN2012102767860A Pending CN102777884A (en) | 2012-08-06 | 2012-08-06 | Washing method of power station boiler temperature reducing water system and washing pipeline connection structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106824882A (en) * | 2017-03-22 | 2017-06-13 | 南京电力设备质量性能检验中心 | The cleaning equipment and cleaning method of extra-supercritical unit high pressure extraction heat regenerative system |
| CN111810257A (en) * | 2020-08-10 | 2020-10-23 | 西安热工研究院有限公司 | Flushing system and flushing method for salt deposit of power station steam turbine |
| CN113375336A (en) * | 2021-06-28 | 2021-09-10 | 丹阳市汉德瑞工具有限公司 | Power frequency induction electromagnetic boiler with intelligent control system and use method thereof |
| CN113375337A (en) * | 2021-06-28 | 2021-09-10 | 丹阳市汉德瑞工具有限公司 | Power frequency induction electromagnetic boiler with circulating heating system and use method thereof |
| CN114403714A (en) * | 2022-01-13 | 2022-04-29 | 北京红岸水滴科技发展有限公司 | Cooking equipment |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106824882A (en) * | 2017-03-22 | 2017-06-13 | 南京电力设备质量性能检验中心 | The cleaning equipment and cleaning method of extra-supercritical unit high pressure extraction heat regenerative system |
| CN111810257A (en) * | 2020-08-10 | 2020-10-23 | 西安热工研究院有限公司 | Flushing system and flushing method for salt deposit of power station steam turbine |
| CN113375336A (en) * | 2021-06-28 | 2021-09-10 | 丹阳市汉德瑞工具有限公司 | Power frequency induction electromagnetic boiler with intelligent control system and use method thereof |
| CN113375337A (en) * | 2021-06-28 | 2021-09-10 | 丹阳市汉德瑞工具有限公司 | Power frequency induction electromagnetic boiler with circulating heating system and use method thereof |
| CN113375337B (en) * | 2021-06-28 | 2022-06-24 | 丹阳市汉德瑞工具有限公司 | Power frequency induction electromagnetic boiler with circulating heating system and use method thereof |
| CN113375336B (en) * | 2021-06-28 | 2022-06-24 | 丹阳市汉德瑞工具有限公司 | Power frequency induction electromagnetic boiler with intelligent control system and use method thereof |
| CN114403714A (en) * | 2022-01-13 | 2022-04-29 | 北京红岸水滴科技发展有限公司 | Cooking equipment |
| CN114403714B (en) * | 2022-01-13 | 2022-12-20 | 北京红岸水滴科技发展有限公司 | Cooking equipment |
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Application publication date: 20121114 |