CN202757111U - Pipeline washing and connecting structure of desuperheating water systems of utility boiler - Google Patents
Pipeline washing and connecting structure of desuperheating water systems of utility boiler Download PDFInfo
- Publication number
- CN202757111U CN202757111U CN 201220385849 CN201220385849U CN202757111U CN 202757111 U CN202757111 U CN 202757111U CN 201220385849 CN201220385849 CN 201220385849 CN 201220385849 U CN201220385849 U CN 201220385849U CN 202757111 U CN202757111 U CN 202757111U
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- Prior art keywords
- desuperheating water
- desuperheating
- water
- electrically operated
- operated gate
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Abstract
The utility model discloses a pipeline washing and connecting structure of desuperheating water systems of a utility boiler. The structure comprises a desuperheating water header (3) and a desuperheating device (6), wherein the desuperheating water header (3) and the desuperheating device (6) are arranged in equipment of the desuperheating water systems of the utility boiler and connected through a desuperheating water pipeline, a first electronic door (4) and a second electronic door (5) are arranged on the desuperheating water pipeline, and a temporary communicating pipe (7) is connected between the first electronic door (4) and the second electronic door (5). By means of a simple temporary system and the operation method, the structure ensures the fact that all the desuperheating water systems are washed, ensures washing flow due to the fact that the inner diameter of the temporary pipe is larger than that of a superheating water pipe, and therefore guarantees washing effects.
Description
Technical field
The utility model discloses a kind of flushing line syndeton of station boiler Attemperation water system, belong to the 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 to can have a large amount of foreign material and corrosion thing in manufacturing, transportation and installation process.The Attemperation water system of station boiler is because the problem of system layout, can't after installation, carry out Chemical cleaning, nor demineralized water or the steam of flushing Attemperation water system can be entered attemperator (6), otherwise a large amount of foreign material will enter superheater system thereupon, affect boiler safety.The part engineering is cleaned the desuperheating water pipeline before installation; but nonetheless; owing to also have a very long time (generally having 3～4 months) to unit starting after pipeline installs; during this period of time pipeline inevitably can with contact with air; thereby again produce the corrosion thing, 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 Attemperation water system formally puts into operation thoroughly.
The at present general purging method of adopting of station boiler Attemperation water system has two kinds: method one is the flushing of whole process using water, namely before attemperator 6, disconnect formal pipeline, be connected to the safe place with temporary pipeline, start feed pump 1, the demineralized water of high pressure is discharged through whole Attemperation water systems to temporary pipeline; 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 3 sections of desuperheating water headers adopt the steam backwash, utilize the steam that produces after the ignition of the boiler to rush 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 large drawback in the former application of two kinds of purging methods of above-mentioned common employing, method one can't be washed attemperator 6, the attemperator complicated structure, desuperheating water spout wherein is again loose structure, therefore the manufacturing of attemperator processing legacy is more, if do not obtain good flushing, these foreign material of leaving over will enter the boiler high temperature heating surface successively after Attemperation water system put into operation, and brought hidden danger to unit safety operation.Although method two has solved the problem that method one exists, and makes whole Attemperation water systems all obtain flushing, has the problem that developing result is bad, developing cost is higher; Its former because: 1, the flushing demineralized water or the discharging of steam all be to drain into trench through desuperheating water header drain pipe, and desuperheating water header drain pipe internal diameter only has 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 cause the momentum that washes not enough, a lot of attachments can't develop from Attemperation water system.2, steam rushes 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 Attemperation water system can't be rinsed well, then after Attemperation water system formally puts into operation, can cause foreign material to enter 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
Problem to be solved in the utility model is: provide a kind of flushing line syndeton of simple in structure, developing result good, cost is low a kind of station boiler Attemperation water system, to overcome the deficiencies in the prior art.
The technical solution of the utility model: the purging method of station boiler Attemperation water system, it comprises the station boiler Attemperation water system, the method is to increase interim communicating pipe at the station boiler Attemperation water system first, 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 the 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 the first Electrically operated gate before the flushing, steam → attemperator → the 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 Attemperation water system, it comprises desuperheating water header and attemperator in the station boiler Attemperation water system equipment, the desuperheating water header is connected by the desuperheating water pipeline with attemperator, be provided with the first Electrically operated gate and the second Electrically operated gate at the desuperheating water pipeline, between the first Electrically operated gate and the second Electrically operated gate, be connected with interim communicating pipe.
Compared with prior art, the utility model is by a kind of simple temporary system and mode of operation, can guarantee that whole Attemperation water systems all obtain 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 Attemperation water system obtains all, effectively flushing, cause easily foreign material to enter 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.Therefore the utility model can bring good safety benefit to fired power generating unit, has the meaning of popularization.
Description of drawings
Fig. 1 is structural representation of the present utility model.
The specific embodiment
The utility model embodiment: the main composition equipment of station boiler Attemperation water system is: feed pump 1, desuperheating water house steward Electrically operated gate 2, desuperheating water header 3, the first Electrically operated gate 4, the second Electrically operated gate 5, attemperator 6, desuperheating water header drain pipe 8 and hydrophobic manually operated door 9.The prerequisite that the utility model is realized is to increase interim communicating pipe at the station boiler Attemperation water system first, interim communicating pipe 7 between the first Electrically operated gate 4, the second Electrically operated gate 5, select communicating pipe 7 temporarily caliber need caliber greater than the desuperheating water pipeline; The first Electrically operated gate 4, the second Electrically operated gate 5 are positioned on the desuperheating water pipeline that connects desuperheating water header 3 and attemperator 6; Just can realize in the steps below the flushing of station boiler Attemperation water system after installing interim communicating pipe 7.
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 the second road water flushing: close the 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 first via water flushing operating procedure corresponding with the flushing of the second road water 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. the first Electrically operated gate 4 and the second Electrically operated gate 5 keep closing;
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 gradually Electrically operated gate 4;
F. repeat said process 2 times;
Carry out the backwash of Third Road steam after finishing above-mentioned steps: close the first Electrically operated gate 4 before the flushing, steam → attemperator 6 → the second Electrically operated gate 5 → temporarily manage 7 → row's atmosphere.
Third Road steam backwash operation step is:
A. desuperheating water house steward Electrically operated gate 2 keeps closing;
B. Electrically operated gate 4 and Electrically operated gate 5 keep closing;
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 gradually Electrically operated gate 5;
F. repeat said process 2 times.
Claims (2)
1. the flushing line syndeton of a station boiler Attemperation water system, it comprises desuperheating water header (3) and attemperator (6) in the station boiler Attemperation water system equipment, desuperheating water header (3) is connected by the desuperheating water pipeline with attemperator (6), be provided with the first Electrically operated gate (4) and the second Electrically operated gate (5) at the desuperheating water pipeline, it is characterized in that: between the first Electrically operated gate (4) and the second Electrically operated gate (5), be connected with interim communicating pipe (7).
2. the flushing line syndeton of station boiler Attemperation water system according to claim 1 is characterized in that the caliber of interim communicating pipe (7) is greater than the caliber of desuperheating water pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385849 CN202757111U (en) | 2012-08-06 | 2012-08-06 | Pipeline washing and connecting structure of desuperheating water systems of utility boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220385849 CN202757111U (en) | 2012-08-06 | 2012-08-06 | Pipeline washing and connecting structure of desuperheating water systems of utility boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202757111U true CN202757111U (en) | 2013-02-27 |
Family
ID=47736291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220385849 Expired - Fee Related CN202757111U (en) | 2012-08-06 | 2012-08-06 | Pipeline washing and connecting structure of desuperheating water systems of utility boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202757111U (en) |
-
2012
- 2012-08-06 CN CN 201220385849 patent/CN202757111U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20150806 |
|
| EXPY | Termination of patent right or utility model |