CN101424402A - Method for purging large-sized station boiler decompression blowtorch system and equipment thereof - Google Patents
Method for purging large-sized station boiler decompression blowtorch system and equipment thereof Download PDFInfo
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- CN101424402A CN101424402A CNA2007102023614A CN200710202361A CN101424402A CN 101424402 A CN101424402 A CN 101424402A CN A2007102023614 A CNA2007102023614 A CN A2007102023614A CN 200710202361 A CN200710202361 A CN 200710202361A CN 101424402 A CN101424402 A CN 101424402A
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Abstract
The invention discloses a method and a device for blowing and washing boiler decompression pipe-blowing systems of large-scale power stations. The diameter of a slag discharge pipe of a particle collector on a first-stage decompression pipe-blowing system is increased, and the slag discharge pipe is taken as a common pipe for discharging slag and steam; meanwhile, a gas by-pass pipe is added in front of a particle collector pipeline on the first-stage decompression pipe-blowing system; therefore, in a blowing-washing process, sundries and one part of gas in a superheater system are discharged from the slag discharge pipe and the gas by-pass pipe to decrease the flow resistance of gas in the superheater system, so as to strengthen the blowing-washing for the superheater system; and the other part of the gas passes through the particle collector and cleans a reheater system along a steam pipeline, so as to ensure that the blowing-washing for the superheater system and the reheater system are qualified at the same time. Therefore, the pipe-blowing frequency of each boiler can be reduced by 15 to 20 times, so the cost equal to hundreds of thousands of or even millions of yuan for blowing pipes of each boiler can be saved according to that the cost for each blowing-washing is 70,000 yuan. As a result, the method and the device can bring good economic benefit and social benefit.
Description
Technical field
The present invention relates to the blow-washing method and the equipment thereof of a kind of large-sized station boiler decompression blowpipe system, belong to boiler tubing steam purge technical field.
Background technology
The boiler tubing steam purge is the big event of unit Capital Construction Debugging, its objective is the kinetic energy that applying steam produces, remove superheater system, reheater system and jet chimney remaining foreign material and corrosion thing in transporting, depositing and install, to guarantee boiler unit safety and economic operation.Boiler blow piping generally is divided into two kinds of voltage stabilizing blowpipe and step-down blowpipes at present, but in existing power plant construction process, owing to reasons such as moisturizing does not catch up with, very difficult coordinations of duration, the voltage stabilizing blowpipe generally is difficult for realizing, so what usually all adopt is the mode of step-down blowpipe, the superheater system and the reheater system of boiler carried out purge.
Step-down blowpipe mode is an amount of stored heat of utilizing boiler self to produce, the additional vaporization amount that relies on the quick step-down process of boiler to be produced, obtain bigger steam flow at short notice, rely on effective purge time (blowpipe coefficient greater than 1 time) and instantaneous momentum to reach a kind of method of blowpipe purpose.The step-down blowpipe generally has stage step-down blowpipe and two stages section step-down blowpipe dual mode.One stage step-down blowpipe can make full use of the chance of each purge superheater system and reheater system are carried out purge simultaneously, and does not need to carry out system's switching, but need install granulating device additional, and the tiny superheater foreign material of part have the possibility that enters the reheater system; Find in the practice of stage step-down blowpipe that simultaneously always purge is qualified many times in advance than superheater system in the reheater system, and is very serious to energy waste like this.Two stage pressure reduction blowpipes do not need granulating device, but two stage pressure reduction blowpipes will be waited until the superheater system purge and just the reheater system be carried out purge after qualified, the usefulness of each purge is not high, very serious waste is also arranged, and will carry out system's switching the purge of superheater system and reheater system.
Simultaneously owing to adopt the mode of step-down blowpipe, total blowpipe number of times more (many persons can reach over one hundred time).Rely on oil firing to carry out blowpipe, fuel consumption is very big, and damage the fatigue life that also can cause boiler heavy wall pressure-containing member of being on the increase of boiler tubing steam purge number of times.Tool statistics, in large-scale unit debugging, the every purge of boiler once just needs to consume 6 tons of about diesel oil, closes nearly 40,000 yuan of RMB at present, adds water power, expense such as artificial, and one time purge just costs nearly about 70,000 yuan.
Summary of the invention
The problem to be solved in the present invention is: the blow-washing method and the equipment thereof that provide a kind of simple in structure, every boiler can reduce the large-sized station boiler decompression blowpipe system of step-down blowpipe number of times 15～20 times, and to overcome the deficiencies in the prior art.
Technical scheme of the present invention; The blow-washing method of a kind of large-sized station boiler decompression blowpipe system, be characterized in: by increasing the scum pipe caliber of granulating device in the stage step-down blowpipe system, and with it as deslagging and the shared pipe of steam discharge, on superheater system in the stage step-down blowpipe system and the jet chimney between the granulating device pipeline, increase a gas bypass pipe simultaneously again, like this when purge, foreign material in the superheater system and portion gas are then discharged from scum pipe and gas bypass pipe, and reduce the interior gas flow resistance of superheater system, thereby strengthen purge to superheater system; Another part gas then cleans the reheater system along jet chimney by granulating device, and purge is qualified simultaneously to make superheater system and reheater system.
The equipment of a kind of large-sized station boiler decompression blowpipe system, it comprises the equipment of stage step-down blowpipe system, be characterized in: on the superheater system 1 of stage step-down blowpipe system equipment and the steam connection tube road between the granulating device 2, connect a gas bypass pipe 3, and the caliber R that will be connected the scum pipe 4 on the granulating device 2 increases 1～2 times.
Above-mentioned large-sized station boiler decompression blowpipe system is that gas bypass pipe 3 is positioned at the front side of granulating device 2.
Compared with the prior art, the present invention is by increasing the scum pipe caliber of granulating device in the existing stage step-down blowpipe system, and with it as deslagging and the shared pipe of steam discharge, increase a gas bypass pipe before the granulating device pipeline in stage step-down blowpipe system again simultaneously, like this when purge, foreign material in the superheater system and portion gas are then discharged from scum pipe and gas bypass pipe, so just can reduce the gas flow resistance in the superheater system, in the purge process, strengthen purge superheater system; Another gas divides gas then reheat system to be cleaned along jet chimney by granulating device, and purge is qualified simultaneously thereby make superheater system and reheat system.So just can make every boiler can reduce the blowpipe number of times 15～20 times, be 70,000 yuan of calculations by a purge expense, be equivalent to every boiler blow piping will reduce expenses hundreds of thousands even unit up to a million, so the present invention can bring good economic benefits and social benefit; Reduce fatigue damage that the blowpipe number of times can reduce on the one hand boiler heavy wall pressure-containing member simultaneously, prolong unit service life; Can reduce fuel consume on the other hand significantly, save startup test run cost.
Figure of description
Fig. 1 is a structural representation of the present invention.
The specific embodiment
Embodiments of the invention: structure of the present invention as shown in Figure 1, it is on the basis of existing stage step-down blowpipe system equipment, the caliber R of the scum pipe 4 of the granulating device 2 of one stage step-down blowpipe system equipment is increased, make its caliber R increase 1～2 times, as increasing to Φ 273mm from existing Φ 108mm, then with scum pipe 4 as the shared pipe of deslagging steam discharge; Simultaneously on the superheater system 1 of stage step-down blowpipe system equipment and the steam connection tube road between the granulating device 2, connect a gas bypass pipe 3 again, the optimum position of gas bypass pipe 3 is the front side of granulating device 2, when large-sized station boiler and pipeline were carried out purge, foreign material in the superheater system 1 and portion gas were then discharged from scum pipe 4 and gas bypass pipe 3 like this.The setting of scum pipe 4 and gas bypass pipe 3 can reduce the gas flow resistance in the superheater system 1, makes superheater system 1 to the gas flow grow between the granulating device 2, thereby can strengthen the purge to superheater system 1 on existing basis; Another part gas then flows to reheater system 5 by granulating device 2 along jet chimney, reheater system 5 is cleaned, so just can overcome the deficiency of existing stage step-down blowpipe, purge is qualified simultaneously to make superheater system and reheat system, and can make every boiler can reduce step-down blowpipe number of times 15～20.
Claims (3)
- The blow-washing method of [claim 1] a kind of large-sized station boiler decompression blowpipe system, it is characterized in that: this method is by increasing the scum pipe caliber of granulating device in the stage step-down blowpipe system, it as deslagging and the shared pipe of steam discharge, is simultaneously increased a gas bypass pipe on the superheater system of stage step-down blowpipe system and the jet chimney between the granulating device; During purge, foreign material and portion gas in the superheater system are discharged from scum pipe and gas bypass pipe, another part gas then cleans the reheater system along jet chimney by granulating device, and purge is qualified simultaneously to make superheater system and reheater system.
- [claim 2] a kind of large-sized station boiler decompression blowpipe system, it comprises the equipment of stage step-down blowpipe system, it is characterized in that: on the superheater system (1) of stage step-down blowpipe system equipment and the jet chimney between the granulating device (2), be connected with gas bypass pipe (3), and the caliber (R) that will be connected the scum pipe (4) on the granulating device (2) increases 1～2 times.
- [claim 3] large-sized station boiler decompression blowpipe according to claim 2 system is characterized in that: gas bypass pipe (3) is positioned at the front side of granulating device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102023614A CN101424402A (en) | 2007-11-01 | 2007-11-01 | Method for purging large-sized station boiler decompression blowtorch system and equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007102023614A CN101424402A (en) | 2007-11-01 | 2007-11-01 | Method for purging large-sized station boiler decompression blowtorch system and equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101424402A true CN101424402A (en) | 2009-05-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007102023614A Pending CN101424402A (en) | 2007-11-01 | 2007-11-01 | Method for purging large-sized station boiler decompression blowtorch system and equipment thereof |
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| CN (1) | CN101424402A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915427A (en) * | 2010-08-20 | 2010-12-15 | 湖南省电力公司试验研究院 | Method for debugging boiler by pipe blowing |
| CN103912886A (en) * | 2014-03-19 | 2014-07-09 | 云南电力试验研究院（集团）有限公司电力研究院 | Intermittent supercritical unit stabilized-pressure pipe blowing method |
-
2007
- 2007-11-01 CN CNA2007102023614A patent/CN101424402A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915427A (en) * | 2010-08-20 | 2010-12-15 | 湖南省电力公司试验研究院 | Method for debugging boiler by pipe blowing |
| CN103912886A (en) * | 2014-03-19 | 2014-07-09 | 云南电力试验研究院（集团）有限公司电力研究院 | Intermittent supercritical unit stabilized-pressure pipe blowing method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20090506 |