CN107150055A - The auxiliary vapour purging system and method not restricted before a kind of unit starting by steam - Google Patents
The auxiliary vapour purging system and method not restricted before a kind of unit starting by steam Download PDFInfo
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- CN107150055A CN107150055A CN201710538717.5A CN201710538717A CN107150055A CN 107150055 A CN107150055 A CN 107150055A CN 201710538717 A CN201710538717 A CN 201710538717A CN 107150055 A CN107150055 A CN 107150055A
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- auxiliary vapour
- pipeline
- steam
- auxiliary
- header
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- 238000010926 purge Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 8
- 210000004907 gland Anatomy 0.000 claims description 19
- 238000007664 blowing Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 230000002209 hydrophobic effect Effects 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 206010037544 Purging Diseases 0.000 description 30
- 229910000975 Carbon steel Inorganic materials 0.000 description 10
- 239000010962 carbon steel Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000012790 confirmation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The invention discloses the auxiliary vapour purging system not restricted before a kind of unit starting by steam and method, it solves the problem of purging pipeline installation workload is big, waste of steam is more in the prior art, few with installation, the beneficial effect of steam saving, its scheme is as follows：Auxiliary vapour purging system includes auxiliary vapour header, and auxiliary vapour header is connected by steam turbine pre-warm pipeline with steam turbine, and auxiliary vapour header is also connected to pipeline with steam turbine again by cold, and steam turbine is connected with cold again to the interim main pipe pipeline of auxiliary vapour purging；Auxiliary vapour header is connected by axle envelope pipeline with axle envelope purging system, and auxiliary vapour header is connected by auxiliary vapour to oxygen-eliminating device pipeline with oxygen-eliminating device, and auxiliary vapour header is evacuated to auxiliary steam pipe road by four and is connected with oxygen-eliminating device, and oxygen-eliminating device is connected with four and takes out pipeline.
Description
Technical field
The present invention relates to band steam feed pump Turbo-generator Set, not by steam system before more particularly to a kind of unit starting
Auxiliary vapour purging system about and method.
Background technology
Unit Auxiliary Steam is as the common steam system of whole plant, and the system sets an auxiliary vapour header, for unit
Each user's vapour.The auxiliary vapour user in steam turbine side mainly has：Oxygen-eliminating device heating vapour, feed pump turbine debugging vapour, axle envelope are used
Vapour etc..The main vapour source of Auxiliary Steam is drawn gas from cold section of reheating, four sections of steam turbine, starting trouble and as the occasion requires or old factory carrys out vapour,
Start vapour source from starting trouble, as the occasion requires or old factory's auxiliary steam, steam parameter is generally pressure 0.8-1.2MPa, temperature 300
DEG C or so.Auxiliary Steam, because Auxiliary Steam inner surface of pipeline produces corrosion, is welded to connect simultaneously before coming into operation
Inner surface remains welding slag, dust and dirt etc., the user such as steam turbine gland system, feed pump turbine debugging vapour, oxygen-eliminating device vapour afterwards
Higher is required to steam quality, therefore steam blowing must be carried out to Auxiliary Steam in the installation and debugging stage, due to auxiliary
Vapour system user is more, and each user pipe connection is more complicated, when general unit is purged to Auxiliary Steam, takes each use
Family is individually purged, and waits user's purging to complete, externally after the cooling of emptying temporary pipeline, could be this user isolation, will be external
Emptying temporary pipeline is attached to next user and purged, and this is that steam blowing brings larger difficulty, not only increases auxiliary and steams
Vapour system purges pipeline installation workload temporarily, even more wastes a large amount of steam.
The content of the invention
In order to overcome the deficiencies in the prior art, blown the invention provides the auxiliary vapour not restricted before a kind of unit starting by steam
System is swept, simplifies temporary system Pipe installing before the auxiliary vapour system purge in unit steam turbine side, simplifies sweeping process during purging, is saved
A large amount of steam.
A kind of concrete scheme for the auxiliary vapour purging system not restricted before unit starting by steam is as follows：
A kind of auxiliary vapour purging system not restricted before unit starting by steam, including：
Auxiliary vapour header, auxiliary vapour header is connected by steam turbine pre-warm pipeline with steam turbine, auxiliary vapour header also by it is cold again extremely
Pipeline is connected with steam turbine, and steam turbine is connected with cold again to the interim main pipe pipeline of auxiliary vapour purging；Auxiliary vapour header passes through auxiliary vapour to axle
Tube sealing road is connected with axle envelope purging system, and auxiliary vapour header is connected by auxiliary vapour to oxygen-eliminating device pipeline with oxygen-eliminating device, and auxiliary vapour header leads to
Cross four and be evacuated to auxiliary steam pipe road and be connected with oxygen-eliminating device, oxygen-eliminating device is connected with four and takes out pipeline, and auxiliary vapour to oxygen-eliminating device pipeline and four takes out pipeline
Pipeline temporary pipeline is taken out by auxiliary vapour to oxygen-eliminating device pipeline to four to connect, four take out pipeline by small machine low-pressure admission pipeline with being connected
It is cold to purge interim main pipe pipeline connection to auxiliary vapour again.
Above-mentioned purging system, power plant's Auxiliary Steam pipeline cloth is taken into full account before unit Auxiliary Steam purging
Put, all auxiliary vapour users are only connected together carry out steam blowing by main pipe in the confined space, not only simplify interim pipe
Road is arranged, more disposably can all have been blown all auxiliary steam users in steam turbine side when auxiliary steam is purged, and saves a large amount of steam
Vapour.
Small machine low-pressure admission pipeline purges interim main pipe pipeline by the first pipeline and small machine high-pressure admission pipeline to auxiliary vapour
Connection；
Further, control for convenience, set four to be evacuated to the small machine non-return flaps of A in the first pipeline, four be evacuated to the small electromechanics of A
Dynamic isolating door and the small machine high-pressure admission electric isolating valves of A.
The small machine low-pressure admission pipeline is also purged interim female by second pipe and small machine high-pressure admission pipeline to auxiliary vapour
Pipeline is connected；
Further, set four to be evacuated to the small machine non-return flaps of B in second pipe, four be evacuated to the small machine electric isolating valves of B and the small machines of B
High-pressure admission electric isolating valve.
The auxiliary vapour header is connected with small machine debugging steam pipe road, and small machine debugging is set between steam pipe road and the first pipeline
There is auxiliary vapour header to the manual isolating door of the small machines of A and auxiliary vapour header to the small machine non-return flaps of A.
The auxiliary vapour header is connected with small machine debugging steam pipe road, and small machine debugging is set between steam pipe road and second pipe
There is auxiliary vapour header to the manual isolating door of the small machines of B and auxiliary vapour header to the small machine non-return flaps of B, non-return flap is used to prevent steam anti-after opening
To flowing.
The auxiliary vapour header is connected with starting jet chimney, is started jet chimney and is connected with starting trouble or heat engine, or
Start jet chimney to connect with old factory's auxiliary steam pipeline；
Further, jet chimney is being started provided with startup jet chimney to auxiliary vapour header electrically operated gate.
The axle envelope purging system purges interim main pipe pipeline with cold again to auxiliary by gland seal system steam exhaust piping to auxiliary vapour
Vapour purges formation exhaust outlet after interim main pipe pipeline communication, UNICOM and communicated with air.
It is described cold again to the interim main pipe pipeline of auxiliary vapour purging provided with the interim low-lying place's drain water piping of main pipe of auxiliary vapour purging, auxiliary vapour
The low-lying place's drain water piping of interim main pipe is purged provided with the hydrophobic manually operated door of temporary pipeline.
Described four, which are evacuated to auxiliary steam pipe road, is evacuated to auxiliary vapour header manually operated door and four provided with four and is evacuated to auxiliary vapour header non-return flap；
Further, steam turbine pre-warm pipeline is provided with auxiliary vapour header to the manual isolating door of steam turbine pre-warm pipeline；
Further, it is cold again to pipeline provided with cold again to the auxiliary manual isolating door of vapour header, cold again to auxiliary vapour header non-return flap
With cold again to auxiliary vapour header electric isolating valve.
In auxiliary vapour to oxygen-eliminating device pipeline from auxiliary vapour header to being sequentially provided with electricity before auxiliary vapour header to oxygen-eliminating device oxygen-eliminating device
Dynamic door, auxiliary vapour header to electrically operated gate after oxygen-eliminating device and auxiliary vapour header are to oxygen-eliminating device non-return flap, and auxiliary vapour to oxygen-eliminating device pipeline is taken out to four
Pipeline temporary pipeline sets four to be evacuated to the oxygen-eliminating device fast valve and four that draws gas and is evacuated to oxygen-eliminating device non-return flap；In small machine debugging steam pipe road
Auxiliary vapour header is set to small machine debugging vapour manually operated door；Auxiliary vapour header is set gradually to gland seal system electricity in auxiliary vapour to axle envelope pipeline
Door and auxiliary vapour header are moved to gland seal system non-return flap.
Present invention also offers the auxiliary vapour blowing method not restricted before a kind of unit starting by steam, comprise the following steps that：
1) company of all parts is carried out according to the auxiliary vapour purging system not restricted before a kind of described unit starting by steam
Connect；
2) confirm that starting jet chimney to auxiliary vapour header electrically operated gate is closed；
3) confirm that four are evacuated to oxygen-eliminating device non-return flap, four are evacuated to auxiliary vapour header non-return flap, it is cold again to auxiliary vapour header non-return flap,
It is counter to fill and remove valve element, confirm auxiliary vapour header to oxygen-eliminating device non-return flap, auxiliary vapour header to gland seal system non-return flap, auxiliary vapour header
To the small machines of A (A steam feed pumps steam turbine) non-return flap, auxiliary vapour header to the small machines of B (B steam feed pumps steam turbine) non-return flap, four
The small machine non-return flaps of A are evacuated to, four are evacuated to the small machine non-return flaps of B, have removed valve element；Non-return valve is anti-the reason for fill is：Non-return valve has
The unidirectional function of crossing vapour, because there is pipeline all to need to be reversed purging, it is therefore desirable to counter to fill non-return valve；
4) confirm that gland seal system enters steam exhaust piping short circuit, all filter screens have been removed；Unit is in axle envelope construction stage, axle
Envelope steam inlet pipe road is equipped with the filter screen for preventing impurity from entering turbine shaft seal, to ensure that this filter screen has been removed in purge stages, otherwise
Resistance of ducting influence purging effect can be increased, filter screen is blown bad by more serious meeting；
5) the first hydrophobic manually operated door of standard-sized sheet temporary pipeline, then gradually remaining electrically operated gate and manually operated door in standard-sized sheet system；
6) it is crack to open dynamic jet chimney to auxiliary vapour header electrically operated gate to whole system progress heating coil；
7) steam drain and all tube wall temperatures are tested, when steam drain and tube wall temperature are all higher than 200 DEG C, system
Heating coil terminates, and fully closed auxiliary vapour header to oxygen-eliminating device bypasses electrically operated gate, auxiliary vapour header to electrically operated gate before oxygen-eliminating device, auxiliary vapour header to axle
Envelope system electrically operated gate, auxiliary vapour header is to small machine debugging vapour manually operated door, and four are evacuated to auxiliary vapour header manually operated door, cold again to auxiliary vapour header
Manual isolating door, auxiliary vapour header to the manual isolating door of steam turbine pre-warm pipeline；
8) by rate-determining steps 7) valve closed, each branch road is purged successively, each branch road purging 3-5 times, often
The time of secondary purging setting, until steam drain steam free from admixture is taken i.e. purging out of and completed.
Compared with prior art, the beneficial effects of the invention are as follows：
1) present invention can pass through steam turbine side each user of auxiliary steam before unit steam turbine side Auxiliary Steam purging
Temporary pipeline carries out short circuit, and steam is discharged into air after auxiliary vapour header by each user, then by discharging main pipe temporarily, can be by
The corrosion that Auxiliary Steam inner surface of pipeline is produced, while being welded to connect rear inner surface residual welding slag, dust and dirt etc., all blows
Walk.
2) purging system of the present invention is simple in construction, quickly can carry out steam blowing to auxiliary vapour user, save a large amount of steam.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.
Fig. 1 is schematic structural view of the invention；
In figure：1 starts jet chimney to auxiliary vapour header electrically operated gate；2 auxiliary vapour headers to oxygen-eliminating device bypasses electrically operated gate；3 auxiliary vapour
Header is to oxygen-eliminating device non-return flap；4 auxiliary vapour headers are to electrically operated gate after oxygen-eliminating device；5 auxiliary vapour headers are to electrically operated gate before oxygen-eliminating device, 6 auxiliary vapour
Header is to gland seal system electrically operated gate, and 7 auxiliary vapour headers are to gland seal system non-return flap, and 8 auxiliary vapour headers are manual with vapour to small machine debugging
Door, 9 four, which are evacuated to oxygen-eliminating device, draws gas fast valve, and 10 4 are evacuated to oxygen-eliminating device non-return flap, and 11 4 are evacuated to auxiliary vapour header non-return flap, and 12 4 take out
To auxiliary vapour header manually operated door, the small machine high-pressure admission electric isolating valves of 13A, the small machine high-pressure admission electric isolating valves of 14B, 15 auxiliary vapour connection
Case is to the manual isolating door of the small machines of A, and 16 auxiliary vapour headers are to the small machine non-return flaps of A, and 17 is cold again to the auxiliary manual isolating door of vapour header, 18 auxiliary vapour
Header is to the manual isolating door of steam turbine pre-warm pipeline, 19 auxiliary vapour headers to the manual isolating door of the small machines of B, 20 auxiliary vapour headers to the small machines of B
Non-return flap, 21 is cold again to auxiliary vapour header non-return flap, and 22 4 are evacuated to the small machine electric isolating valves of A, and 23 4 are evacuated to the small electromechanical dynamic isolation of B
Door, 24 is cold again to auxiliary vapour header electric isolating valve, and 25 4 are evacuated to the small machine non-return flaps of A, and 26 4 are evacuated to the small machine non-return flaps of B, and 27 is interim
The hydrophobic manually operated door of pipeline, 28 small machine high-pressure admission pipelines to auxiliary vapour purge interim main pipe pipeline (carbon steel material), and 29 is cold again to auxiliary
Vapour purges interim main pipe pipeline (carbon steel material), and 30 auxiliary vapour purge the interim low-lying place's drain water piping (carbon steel material) of main pipe, and 31 is auxiliary
Vapour takes out pipeline temporary pipeline (carbon steel material) to oxygen-eliminating device pipeline to four, and 32 gland seal system steam exhaust piping are interim female to auxiliary vapour purging
Pipeline (carbon steel material), 33 4 take out pipeline, and 34 4 are evacuated to auxiliary steam pipe road, 35 steam turbine pre-warm pipelines, and 36 is cold again to pipeline, 37
Steam pipe road is used in small machine low-pressure admission pipeline, 38 auxiliary vapour headers, 39 small machine debugging, and 40 first pipelines, 41 second pipes, 42 axle envelopes are blown
Sweep system, 43 gland seal system steam exhaust piping, 44 startup jet chimneys.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
As background technology is introduced, the deficiencies in the prior art, in order to solve technical problem as above, this Shen
It please propose the auxiliary vapour purging system not restricted before a kind of unit starting by steam and method.
In a kind of typical embodiment of the application, as shown in figure 1, before a kind of unit starting not by steam restrict it is auxiliary
Vapour purging system, including：Auxiliary vapour header, auxiliary vapour header is connected by steam turbine pre-warm pipeline 35 with steam turbine, and auxiliary vapour header is also
It is connected again to pipeline 36 with steam turbine by cold, steam turbine, which is connected with, cold to be purged interim main pipe pipeline to auxiliary vapour again and (use carbon steel
Material) 29；Auxiliary vapour header is connected by auxiliary vapour to axle envelope pipeline with axle envelope purging system, and auxiliary vapour header passes through auxiliary vapour to oxygen-eliminating device
Pipeline is connected with oxygen-eliminating device, and auxiliary vapour header is evacuated to auxiliary steam pipe road by four and is connected with oxygen-eliminating device, and oxygen-eliminating device is connected with four and takes out pipeline,
Auxiliary vapour to oxygen-eliminating device pipeline and four takes out pipeline and takes out pipeline temporary pipeline (using carbon steel material by auxiliary vapour to oxygen-eliminating device pipeline to four
Matter) 31 connections, four take out pipeline by small machine low-pressure admission pipeline 37 and be connecteds that cold again extremely the interim main pipe pipeline 29 of auxiliary vapour purging connects
Connect.
Above-mentioned purging system, power plant's Auxiliary Steam pipeline cloth is taken into full account before unit Auxiliary Steam purging
Put, all auxiliary vapour users are only connected together carry out steam blowing by main pipe in the confined space, not only simplify interim pipe
Road is arranged, more disposably can all have been blown all auxiliary steam users in steam turbine side when auxiliary steam is purged, and saves a large amount of steam
Vapour.
Small machine low-pressure admission pipeline purges interim main pipe pipe by the first pipeline 40 and small machine high-pressure admission pipeline to auxiliary vapour
Road (carbon steel material) 28 is connected；
Control for convenience, set four to be evacuated to the small machine non-return flaps 25, four of A in the first pipeline 40 and be evacuated to the small electromechanical dynamic isolation of A
The door small machine high-pressure admission electric isolating valves 13 of 22 and A.
The small machine low-pressure admission pipeline is also purged interim by second pipe 41 and small machine high-pressure admission pipeline to auxiliary vapour
Main pipe pipeline is connected；Setting four to be evacuated in second pipe 41, the small machine non-return flaps 26, four of B are evacuated to the small machine electric isolating valves 23 of B and B is small
Machine high-pressure admission electric isolating valve 14.
The auxiliary vapour header is connected with small machine debugging steam pipe road 39, and small machine debugging is between steam pipe road 39 and the first pipeline
Auxiliary vapour header is provided with to the manual isolating door 15 of the small machines of A and auxiliary vapour header to the small machine non-return flaps 16 of A.
The auxiliary vapour header is connected with small machine debugging steam pipe road, and small machine debugging is set between steam pipe road and second pipe
There is auxiliary vapour header to the manual isolating door 19 of the small machines of B and auxiliary vapour header to the small machine non-return flaps 20 of B, non-return flap is used to prevent to steam after opening
Vapour reverse flow.
The auxiliary vapour header is connected with starting jet chimney 44, is started jet chimney 44 and is connected with starting trouble or heat engine,
Or startup jet chimney is connected with old factory's auxiliary steam pipeline；
Starting jet chimney 44 provided with startup jet chimney to auxiliary vapour header electrically operated gate 1.
The axle envelope purging system 42 purges interim main pipe pipeline (carbon steel by gland seal system steam exhaust piping 43 to auxiliary vapour
Material) 32 exhaust outlet is formed after interim main pipe pipeline communication, UNICOM communicated with air with cold purged again to auxiliary vapour.
It is described it is cold purge interim main pipe pipeline to auxiliary vapour again and purge the interim low-lying place's drain water piping of main pipe provided with auxiliary vapour (adopt
With carbon steel material) 30, auxiliary vapour purges the interim low-lying place's drain water piping of main pipe and is provided with the hydrophobic manually operated door 27 of temporary pipeline.
Described four, which are evacuated to auxiliary steam pipe road, is evacuated to auxiliary vapour header manually operated door 12 and four provided with four and is evacuated to auxiliary vapour header non-return flap 11；
Steam turbine pre-warm pipeline is provided with auxiliary vapour header to the manual isolating door 18 of steam turbine pre-warm pipeline；It is cold to be provided with cold again to auxiliary to pipeline again
It is the manual isolating door 17 of vapour header, cold again to auxiliary vapour header non-return flap 21 and cold again to auxiliary vapour header electric isolating valve 24.
In auxiliary vapour to oxygen-eliminating device pipeline from auxiliary vapour header to being sequentially provided with electricity before auxiliary vapour header to oxygen-eliminating device oxygen-eliminating device
Door 5, auxiliary vapour header to electrically operated gate after oxygen-eliminating device 6 and auxiliary vapour header are moved to oxygen-eliminating device non-return flap 3, auxiliary vapour to oxygen-eliminating device pipeline to four
Take out pipeline temporary pipeline and set four to be evacuated to the oxygen-eliminating device fast valve 9 and four that draws gas and be evacuated to oxygen-eliminating device non-return flap 10；Debug and use in small machine
Steam pipe road sets auxiliary vapour header to small machine debugging vapour manually operated door 8；Auxiliary vapour header is set gradually to axle in auxiliary vapour to axle envelope pipeline
Envelope system electrically operated gate 6 and auxiliary vapour header are to gland seal system non-return flap 7.
When Auxiliary Steam is purged：
The first step confirms that starting jet chimney to auxiliary vapour header electrically operated gate 1 closes；
Second step, confirms that four are evacuated to oxygen-eliminating device non-return flap 10, four are evacuated to auxiliary vapour header non-return flap 11, cold again to auxiliary vapour header
Non-return flap 21, it is counter to fill and remove valve element, auxiliary vapour header is confirmed to oxygen-eliminating device non-return flap 3, and auxiliary vapour header is inverse to gland seal system
Only door 7, auxiliary vapour header to the small machine non-return flaps 16 of A, auxiliary vapour header is to the small machine non-return flaps 20 of B, and four are evacuated to the small machine non-return flaps 25 of A, four
The small machine non-return flaps 26 of B are evacuated to, valve element has been removed；
3rd step, confirmation gland seal system enters steam exhaust piping, and all filter screens of short circuit have been removed；
4th step, confirms the system installation as shown in upper step；
Remaining all electronic and manually-operated gate is operated normally in being walked in the confirmation of 5th step；
6th step elder generation all draining valves of the formal system of the standard-sized sheet and hydrophobic manually operated door 27 of temporary pipeline, then gradually standard-sized sheet system
In remaining other electrically operated gates and manually operated door；
7th step, crack unlatching moves jet chimney and carries out heating coil to whole system to auxiliary vapour header electrically operated gate 1；
8th step, is tested steam drain and all tube wall temperatures：Treat that steam drain and all tube wall temperatures are all higher than 200
DEG C when system heating coil terminate, fully closed auxiliary vapour header to oxygen-eliminating device bypasses electrically operated gate 2, and auxiliary vapour header is auxiliary to electrically operated gate before oxygen-eliminating device 5
Vapour header is to gland seal system electrically operated gate 6, and auxiliary vapour header is to small machine debugging vapour manually operated door 8, and four are evacuated to auxiliary vapour header manually operated door 12,
It is cold again to the manual isolating door 17 of auxiliary vapour header, auxiliary vapour header to the manual isolating door 18 of steam turbine pre-warm pipeline；
9th step is purged to each branch road successively by controlling the valve that the 8th step is closed, and each branch road purges 3-5
Secondary, purging 10 minutes or so, estimates steam drain steam free from admixture and takes out of as purging completion every time.
The preferred embodiment of the application is the foregoing is only, the application is not limited to, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. the auxiliary vapour purging system not restricted before a kind of unit starting by steam, it is characterised in that including：
Auxiliary vapour header, auxiliary vapour header is connected by steam turbine pre-warm pipeline with steam turbine, and auxiliary vapour header is also by cold again to pipeline
It is connected with steam turbine, steam turbine is connected with cold again to the interim main pipe pipeline of auxiliary vapour purging；Auxiliary vapour header passes through axle envelope pipeline and axle
Purging system connection is sealed, auxiliary vapour header is connected by auxiliary vapour to oxygen-eliminating device pipeline with oxygen-eliminating device, and auxiliary vapour header is evacuated to auxiliary by four
Steam pipe road is connected with oxygen-eliminating device, and oxygen-eliminating device is connected with four and takes out pipeline, and auxiliary vapour to oxygen-eliminating device pipeline and four takes out pipeline by auxiliary vapour extremely
Oxygen-eliminating device pipeline to four take out pipeline temporary pipeline connection, four take out pipeline by small machine low-pressure admission pipeline and be connected it is cold again extremely auxiliary vapour
Purge interim main pipe pipeline connection.
2. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 1 by steam, it is characterised in that
The small machine low-pressure admission pipeline purges interim main pipe pipeline by the first pipeline and small machine high-pressure admission pipeline to auxiliary vapour and is connected；
Further, set four to be evacuated to the small machine non-return flaps of A in the first pipeline, four be evacuated to the small machine electric isolating valves of A and the small machine high pressures of A
Enter vapour electric isolating valve.
3. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 1 by steam, it is characterised in that
The small machine low-pressure admission pipeline also purges interim main pipe pipeline by second pipe and small machine high-pressure admission pipeline to auxiliary vapour and connected
Connect；
Further, set four to be evacuated to the small machine non-return flaps of B in second pipe, four be evacuated to the small machine electric isolating valves of B and the small machine high pressures of B
Enter vapour electric isolating valve.
4. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 2 by steam, it is characterised in that
The auxiliary vapour header is connected with small machine debugging steam pipe road, and small machine debugging is joined with auxiliary vapour is provided between steam pipe road and the first pipeline
Case is to the manual isolating door of the small machines of A and auxiliary vapour header to the small machine non-return flaps of A.
5. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 3 by steam, it is characterised in that
The auxiliary vapour header is connected with small machine debugging steam pipe road, and small machine debugging is joined with auxiliary vapour is provided between steam pipe road and second pipe
Case is to the manual isolating door of the small machines of B and auxiliary vapour header to the small machine non-return flaps of B.
6. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 1 by steam, it is characterised in that
The auxiliary vapour header is connected with starting jet chimney, is started jet chimney and is connected with starting trouble or heat engine；
Further, jet chimney is being started provided with startup jet chimney to auxiliary vapour header electrically operated gate.
7. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 1 by steam, it is characterised in that
The axle envelope purging system purges interim main pipe pipeline by gland seal system steam exhaust piping to auxiliary vapour and faced again to auxiliary vapour purging with cold
When main pipe pipeline communication, exhaust outlet is formed after UNICOM and is communicated with air.
8. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 1 by steam, it is characterised in that
Described cold again to the interim main pipe pipeline of auxiliary vapour purging provided with the interim low-lying place's drain water piping of main pipe of auxiliary vapour purging, auxiliary vapour purging is interim
The low-lying place's drain water piping of main pipe is provided with the hydrophobic manually operated door of temporary pipeline.
9. the auxiliary vapour purging system not restricted before a kind of unit starting according to claim 1 by steam, it is characterised in that
Described four, which are evacuated to auxiliary steam pipe road, is evacuated to auxiliary vapour header manually operated door and four provided with four and is evacuated to auxiliary vapour header non-return flap；
Further, steam turbine pre-warm pipeline is provided with auxiliary vapour header to the manual isolating door of steam turbine pre-warm pipeline；
Further, it is cold again to pipeline provided with cold again to the auxiliary manual isolating door of vapour header, cold again to auxiliary vapour header non-return flap and cold
Again to auxiliary vapour header electric isolating valve；
Further, in auxiliary vapour to oxygen-eliminating device pipeline from auxiliary vapour header to being sequentially provided with auxiliary vapour header oxygen-eliminating device to oxygen-eliminating device
Preceding electrically operated gate, auxiliary vapour header to electrically operated gate after oxygen-eliminating device and auxiliary vapour header to oxygen-eliminating device non-return flap, auxiliary vapour to oxygen-eliminating device pipeline are arrived
Four, which take out pipeline temporary pipeline, sets four to be evacuated to the oxygen-eliminating device fast valve and four that draws gas to be evacuated to oxygen-eliminating device non-return flap；
Further, auxiliary vapour header is set gradually to gland seal system electrically operated gate and auxiliary vapour header to axle envelope in auxiliary vapour to axle envelope pipeline
System non-return flap.
10. the auxiliary vapour blowing method not restricted before a kind of unit starting by steam, it is characterised in that comprise the following steps that：
1) enter according to the auxiliary vapour purging system not restricted before a kind of unit starting any one of claim 1-9 by steam
The connection of row all parts；
2) confirm that starting jet chimney to auxiliary vapour header electrically operated gate is closed；
3) confirm that four are evacuated to oxygen-eliminating device non-return flap, four are evacuated to auxiliary vapour header non-return flap, cold again to auxiliary vapour header non-return flap, anti-
Fill and remove valve element, confirm auxiliary vapour header to oxygen-eliminating device non-return flap, auxiliary vapour header to gland seal system non-return flap, auxiliary vapour header to A
Small machine non-return flap, auxiliary vapour header is to the small machine non-return flaps of B, and four are evacuated to the small machine non-return flaps of A, and four are evacuated to the small machine non-return flaps of B, have removed
Valve element；
4) confirm that gland seal system enters steam exhaust piping short circuit, all filter screens have been removed；
5) the first hydrophobic manually operated door of standard-sized sheet temporary pipeline, then gradually remaining electrically operated gate and manually operated door in standard-sized sheet system；
6) it is crack to open dynamic jet chimney to auxiliary vapour header electrically operated gate to whole system progress heating coil；
7) steam drain and all tube wall temperatures are tested, when steam drain and tube wall temperature are all higher than 200 DEG C, system heating coil
Terminate, fully closed auxiliary vapour header to oxygen-eliminating device bypasses electrically operated gate, auxiliary vapour header to electrically operated gate before oxygen-eliminating device, auxiliary vapour header to axle envelope system
System electrically operated gate, auxiliary vapour header is to small machine debugging vapour manually operated door, and four are evacuated to auxiliary vapour header manually operated door, cold manual to auxiliary vapour header again
Isolating door, auxiliary vapour header to the manual isolating door of steam turbine pre-warm pipeline；
8) by rate-determining steps 7) valve closed, each branch road is purged successively, each branch road purging 3-5 times blows every time
The time of setting is swept, until steam drain steam free from admixture is taken i.e. purging out of and completed.
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| CN114607480A (en) * | 2022-03-11 | 2022-06-10 | 西安热工研究院有限公司 | Converter-controlled BEST small machine double-machine steam source series complementary structure |
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