CN109908714A - A kind of power station water-steam system high pressure dry-air blast maintenance system and maintenance method - Google Patents
A kind of power station water-steam system high pressure dry-air blast maintenance system and maintenance method Download PDFInfo
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- CN109908714A CN109908714A CN201910289119.8A CN201910289119A CN109908714A CN 109908714 A CN109908714 A CN 109908714A CN 201910289119 A CN201910289119 A CN 201910289119A CN 109908714 A CN109908714 A CN 109908714A
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- 238000012423 maintenance Methods 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007599 discharging Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 19
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 238000004887 air purification Methods 0.000 claims abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 18
- 239000010935 stainless steel Substances 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 230000008014 freezing Effects 0.000 claims description 16
- 238000007710 freezing Methods 0.000 claims description 16
- 238000000926 separation method Methods 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 238000010926 purge Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 5
- -1 Dedusting Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 230000002633 protecting effect Effects 0.000 claims description 4
- 241000208340 Araliaceae Species 0.000 claims description 2
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 235000008434 ginseng Nutrition 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- KWYKSRAECRPMIS-UHFFFAOYSA-N azane;hydrazine Chemical compound N.NN KWYKSRAECRPMIS-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The present invention relates to a kind of power station water-steam system high pressure dry-air blast maintenance system and maintenance method, which includes pressure-air preparation system, pressure-air purification system and high pressure dry-air blast maintenance monitoring system；After the high pressure dry-air blast of water removal, oil removing, dedusting enters water-steam system, by water-steam system emptying valve or dredge, outside discharging valve discharge water-steam system, residual moisture in water-steam system is removed, relative air humidity in water-steam system is reduced, to realize the high pressure dry-air blast maintenance of water-steam system；Compared with existing low pressure dry-air blast maintains technology, the present invention is not required to remove a large amount of non-return valve in water-steam system, reduces the workload that non-return valve is removed with restored；Admission line caliber is smaller, reduces admission line installation workload；It solves water seal, vent plug problem, improves dry-air blast maintenance effect；It is maintained using the high pressure dry-air blast that power station water-steam system may be implemented in system and method for the present invention, power station water-steam system is effectively reduced stops spare corrosion, provides guarantee for power plant safety, economical operation.
Description
Technical field
The present invention relates to power station water-steam system dry-air blast maintenance technical fields more particularly to a kind of power station water-steam system height to press dry
Wind maintenance system and maintenance method.
Background technique
The generating set in China has entered the developing stage of large capacity, high parameter at present.It is a large amount of with large sized unit
Go into operation, China's generated energy is significantly superfluous, unit to stop spare phenomenon more universal, and downtime is longer, to power station steam system
The spare corrosion protection that stops of system proposes strict requirements.The laying-up method of home and abroad station water-steam system mainly has hot wind
Drying method, desiccant go wet process, vapour phase inhibitor method, dry-air blast seasoning, ammonia-hydrazine method, nitrogen charging method etc..Wherein, dry-air blast maintains
Method protecting effect is good, protection period is long, has good economy feasibility, has obtained both domestic and external be widely recognized as.
Currently, power station water-steam system generallys use the moisture in rotary dehumidifier removing air, the dry empty of room temperature is generated
Gas carries out dry-air blast maintenance, and this method has the following problems: 1) rotary dehumidifier outlet wind pressure is 150Pa~500Pa, due to pressure
It is lower, when carrying out dry-air blast maintenance, a large amount of non-return flap in water-steam system need to be removed, removes and the amount of resuming work is big；2) low pressure
Air hose caliber is larger, and installation workload is big；3) since structure is complicated for power station water-steam system, existing blowing out discharge water technique be difficult to it is thorough
Bottom puts it clean water in water-steam system, and when carrying out dry-air blast maintenance, since dry-air blast pressure is lower, there are water seals, gas lock, leads
Maintenance effect is caused to be deteriorated.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, it is high that the purpose of the present invention is to provide a kind of power station water-steam systems
Wind maintenance system and maintenance method are pressed dry, it is big in water-steam system without removing when carrying out the maintenance of power station water-steam system dry-air blast
Non-return flap is measured, solves the problems, such as that non-return flap dismounting, recovery and air hose installation workload are big；Low pressure dry-air blast is prevented to maintain simultaneously
Existing water seal and vent plug problem in the process, water-steam system is effectively reduced stops spare corrosion.
To achieve the above objectives, the present invention adopts the following technical scheme:
A kind of power station water-steam system high pressure dry-air blast maintenance system, including pressure-air preparation system and height connected to it
Air cleaning system is pressed, the high pressure dry-air blast maintenance monitoring system being installed on admission line；
The pressure-air preparation system includes oil free screw air compressor machine 1；The pressure-air purification system includes successively
Stainless steel air accumulator 3, freezing type drier 8, the filter 10 of connection；The high pressure dry-air blast maintains monitoring system, including is located at
The flow, relatively wet of pressure-air is monitored during the high pressure dry-air blast maintenance being arranged on admission line 17 after filter 10 respectively
Degree, the flowmeter 16 of temperature and pressure, humidometer 15, thermometer 14 and pressure gauge 13；Air inlet after filter 10
Intake valve 12 is additionally provided on pipeline 17；High pressure dry-air blast enter filter 10 removed water, dedusting, oil removing, through water removal, oil removing,
The high pressure dry-air blast of dedusting by admission line 17, participate in maintenance power station water-steam system 24 nitrogen fill valve or dredge, discharging valve 18 into
Enter to participate in the power station water-steam system 24 of maintenance, emptying valve in power station water-steam system 24 by participating in maintenance or dredges, discharges water
The discharge of valve 21 participates in outside the power station water-steam system 24 of maintenance, carries out high pressure dry-air blast guarantor to the power station water-steam system 24 for participating in maintenance
It supports.
The oil free screw air compressor machine 1 connects stainless steel air accumulator 3 by the first connecting pipe 2, and stainless steel air accumulator 3 is set
Blowdown valve 6 is set, periodically to drain, blowdown, and safety valve 5 and pressure gauge 4 are set；Freezing type drier 8 passes through the second connecting tube
Road 7 and the outlet of stainless steel air accumulator 3 connect, and remove water for pressure-air；The outlet of freezing type drier 8 passes through the with filter 10
The connection of three connecting pipes 9.
The design parameter of the oil free screw air compressor machine 1 and admission line 17 satisfaction outlet high-pressure air pressure 0.6~
1.0MPa, flow, which meets, participates in the power station water-steam system 24 of maintenance 1~5 air displacement rate per hour；Freezing type drier 8
0.5~1.5MPa of operating pressure, 0~45 DEG C of intake air temperature, outlet air relative humidity is less than 10%；10 outlet air of filter
Oil content is less than 2ppb, and impurity content is less than 1ppb.
The power station water-steam system 24 for participating in maintenance is by nitrogen fill valve or dredges, the connection admission line 17 of discharging valve 18, ginseng
It is disposed with valve 28, reverse stop valve 29, air-discharging from the inlet to the outlet on the pipeline of the power station water-steam system 24 of maintenance
Valve 26, thin, discharging valve 27, the first emptying valve or thin, discharging valve 20 and the second emptying valve are dredged, discharging valve 21；It participates in protecting
The power station water-steam system 23 and second that feeding power station water-steam system 24 is not involved in maintenance with adjacent first are not involved in the electricity of maintenance
The first separation valve door 19 and the second separation valve door 22 are respectively arranged on the pipeline of water-steam system 25 of standing connection.
The maintenance method of the power station water-steam system high pressure dry-air blast maintenance system passes through the power station steam to participation maintenance
It is passed through high pressure dry-air blast in system 24, reduces in water-steam system relative air humidity to carry out dry-air blast maintenance, include the following steps:
Step 1: steam discharge discharges water, power station stop transport when, participate in maintenance power station water-steam system 24 emptying valve 26 and dredge,
Discharging valve 27 is opened, and is carried out steam discharge by emptying valve 26 and thin, discharging valve 27, is discharged water；
Step 2: the foundation in high pressure dry-air blast maintenance circuit: opening the valve 28 in the power station water-steam system 24 for participating in maintenance,
The power station water-steam system 24 for participating in maintenance is connected；The first separation valve door 19 and the second separation valve door 22 are closed, to first
The power station water-steam system 23 of maintenance and second is not involved in be not involved in the power station water-steam system 25 of maintenance and participate in the power station water of maintenance
Vapour system 24 is isolated, and dry-air blast maintenance circuit: atmosphere → oil free screw 1 → stainless steel of air compressor machine air accumulator 3 → freezing is established
10 → admission line of formula 8 → filter of drying machine 17 → participation maintenance power station water-steam system 24 → high pressure dry-air blast outlet → big
Gas；
Step 3: logical high pressure dry-air blast by starting oil free screw air compressor machine 1, and adjusts 12 aperture of intake valve, maintains pressure
Counting 13 registrations is 0.6~1.0MPa, and flow is that displacement participates in the power station water-steam system 24 of maintenance air 1~5 time per hour；
Step 4: high pressure dry-air blast mobility status inspection is successively detected the power station water for participating in maintenance by high pressure dry-air blast maintenance circuit
Emptying valve 26 and dredged, the air mobility status of discharging valve 27 in vapour system 24, see after air flowing close emptying valve 26 and
It dredges, discharging valve 27；If thin, discharging valve 27 there are flowing out, should continue to carry out high pressure dry-air blast purging, anhydrous 15~30min of post-purge
After close；
Step 5: the maintenance of high pressure dry-air blast, the power station water-steam system 24 for participating in maintenance are continually fed into high pressure dry-air blast, are periodically supervising
Location is set and the relative humidity of high pressure dry-air blast outlet port detection exhaust, the relative humidity of exhaust then turn down air inlet less than 50%
Valve 12.
High pressure dry-air blast Inlet Position is nitrogen fill valve or thin, discharging valve 18 in the power station water-steam system 24 for participate in maintenance；Prison
Location sets the first emptying valve in the power station water-steam system 24 for high pressure dry-air blast exhaust position being respectively participation maintenance or dredges, puts
Water valve 20 and second row air valve are dredged, discharging valve 21；The monitoring position is for participating in maintenance during monitoring the maintenance of high pressure dry-air blast
Power station water-steam system 24 in relative humidity.
High pressure dry-air blast intake is adjusted according to the relative humidity of monitoring position and high pressure dry-air blast exhaust position.
It is maintained using high pressure dry-air blast, guarantees that dry-air blast pressure is enough to open in the power station water-steam system 24 for participating in maintenance
Reverse stop valve 29.
Compared to the prior art, the present invention has the advantage that
1) maintenance of power station water-steam system is carried out using high pressure dry-air blast to subtract without removing a large amount of non-return flap in water-steam system
Few water-steam system dry-air blast maintenance work amount；
2) high pressure dry-air blast enters water-steam system, air hose installment work by power station water-steam system nitrogen fill valve or thin, discharging valve
It measures small；
3) water seal due to caused by water in the water-steam system of power station, vent plug problem are solved, effectively to improve dry-air blast maintenance effect
Fruit provides guarantee.
Detailed description of the invention
Fig. 1 is present system schematic diagram.
Specific embodiment
Embodiment 1:
Invention is further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of power station water-steam system high pressure dry-air blast maintenance system of the present invention and method, by water-steam system
It is inside passed through high pressure dry-air blast, the mode for reducing relative air humidity in water-steam system carries out dry-air blast maintenance.Oil free screw air compressor machine 1 is logical
The first connecting pipe 2 connection stainless steel air accumulator 3 is crossed, freezing type drier 8 passes through the second connecting pipe 7 and stainless steel air accumulator
3 outlet connections, remove water for pressure-air；The outlet of freezing type drier 8 is connect with filter 10 by third connecting pipe 9,
High pressure dry-air blast enter filter 10 removed water, dedusting, oil removing；High pressure dry-air blast through water removal, oil removing, dedusting passes through admission line
17 enter participate in maintenance power station water-steam systems 24, by participate in maintenance power station water-steam system 24 in emptying valve or dredge,
The discharge of discharging valve 21 participates in outside the power station water-steam system 24 of maintenance, carries out the maintenance of open type high pressure dry-air blast；The stainless steel air accumulator 3
Blowdown valve 6 is set, periodically to drain, blowdown, and safety valve 5 and pressure gauge 4 are set；Flowmeter is set on the admission line 17
16, humidometer 15, thermometer 13, pressure gauge 14.
The present embodiment maintenance method implementation steps are as follows:
Step 1: steam discharge discharges water, power station stop transport when, participate in maintenance power station water-steam system 24 emptying valve 26 and dredge,
Discharging valve 27 is opened, and is carried out steam discharge by emptying valve 26 and thin, discharging valve 27, is discharged water；
Step 2: high pressure dry-air blast maintains the foundation in circuit, opens the valve 28 in the power station water-steam system 24 for participating in maintenance,
The power station water-steam system 24 for participating in maintenance is connected；The first separation valve door 19 and the second separation valve door 22 are closed, to first
The power station water-steam system 23 of maintenance and second is not involved in be not involved in the power station water-steam system 25 of maintenance and participate in the power station water of maintenance
Vapour system 24 is isolated, and dry-air blast maintenance circuit: atmosphere → oil free screw 1 → stainless steel of air compressor machine air accumulator 3 → freezing is established
10 → admission line of formula 8 → filter of drying machine 17 → participation maintenance power station water-steam system 24 → high pressure dry-air blast outlet → big
Gas；
Step 3: logical high pressure dry-air blast by starting oil free screw air compressor machine 1, and adjusts 12 aperture of intake valve, maintains pressure
Counting 13 registrations is 0.9MPa, and flow is that displacement participates in the power station water-steam system 24 of maintenance air 2 times per hour；High pressure dry-air blast into
10 DEG C of temperature degree, relative humidity 0.5%；Filter outlet dry-air blast oil content is less than 2ppb, and impurity content is less than 1ppb；
Step 4: high pressure dry-air blast mobility status inspection is successively detected the power station water for participating in maintenance by high pressure dry-air blast maintenance circuit
Emptying valve 26 and dredged, the air mobility status of discharging valve 27 in vapour system 24, see after air flowing close emptying valve 26 and
It dredges, discharging valve 27；If thin, discharging valve 27 there are flowing out, should continue to carry out high pressure dry-air blast purging, anhydrous 15~30min of post-purge
After close；
Step 5: the maintenance of high pressure dry-air blast, the power station water-steam system 24 for participating in maintenance are continually fed into high pressure dry-air blast, are periodically supervising
Location is set and the relative humidity of high pressure dry-air blast outlet port detection exhaust, the relative humidity of exhaust can be turned down suitably less than 50%
Intake valve 12.
It is as shown in table 1 the present embodiment high pressure dry-air blast maintenance monitoring position and exhaust position monitoring record.
1 embodiment of table, 1 high pressure dry-air blast maintenance monitoring position and exhaust position monitoring record (totally 26 weeks)
Embodiment 2:
As shown in Figure 1, a kind of power station water-steam system high pressure dry-air blast maintenance system of the present invention and method, by water-steam system
It is inside passed through high pressure dry-air blast, the mode for reducing relative air humidity in water-steam system carries out dry-air blast maintenance.Oil free screw air compressor machine 1 is logical
The first connecting pipe 2 connection stainless steel air accumulator 3 is crossed, freezing type drier 8 passes through the second connecting pipe 7 and stainless steel air accumulator
3 outlet connections, remove water for pressure-air；The outlet of freezing type drier 8 is connect with filter 10 by third connecting pipe 9,
High pressure dry-air blast enter filter 10 removed water, dedusting, oil removing；High pressure dry-air blast through water removal, oil removing, dedusting passes through admission line
17 enter the power station water-steam systems 24 for participating in maintenance, by participating in the emptying valve of the power station water-steam system 24 of maintenance or dredging, put
The discharge of water valve 21 participates in outside the power station water-steam system 24 of maintenance, carries out the maintenance of open type high pressure dry-air blast；The stainless steel air accumulator 3 is set
Blowdown valve 6 is set, periodically to drain, blowdown, and safety valve 5 and pressure gauge 4 are set；Flowmeter is set on the admission line 17
16, humidometer 15, thermometer 13, pressure gauge 14.
The present embodiment maintenance method implementation steps are as follows:
Step 1: steam discharge discharges water, power station stop transport when, participate in maintenance power station water-steam system 24 emptying valve 26 and dredge,
Discharging valve 27 is opened, and is carried out steam discharge by emptying valve 26 and thin, discharging valve 27, is discharged water；
Step 2: high pressure dry-air blast maintains the foundation in circuit, opens 24 inner valve 28 of power station water-steam system for participating in maintenance, right
The power station water-steam system 24 for participating in maintenance is connected；It closes the first separation valve door 19 and the second separation valve door 22 is not joined to first
The power station water-steam system 25 of maintenance is not involved in the power station water-steam system 23 of maintenance and second and participates in the power station steam system of maintenance
System 24 is isolated, and establish dry-air blast maintenance circuit: atmosphere → oil free screw air compressor machine 1 → stainless steel, 3 → freezing type of air accumulator is dry
10 → admission line of dry 8 → filter of machine 17 → participation maintenance power station 24 → high pressure of water-steam system dry-air blast outlet → atmosphere；
Step 3: logical high pressure dry-air blast by starting oil free screw air compressor machine 1, and adjusts 12 aperture of intake valve, maintains pressure
Counting 13 registrations is 0.6MPa, and flow is to set the power station for participating in maintaining per hour to change air 1 time in water-steam system 24；High pressure dry-air blast into
10 DEG C of temperature degree, relative humidity 1.5%；Filter outlet dry-air blast oil content is less than 2ppb, and impurity content is less than 1ppb；
Step 4: high pressure dry-air blast mobility status inspection is successively detected the power station water for participating in maintenance by high pressure dry-air blast maintenance circuit
Emptying valve 26 and dredged, the air mobility status of discharging valve 27 in vapour system 24, see after air flowing close emptying valve 26 and
It dredges, discharging valve 27.If thin, discharging valve 27 there are flowing out, should continue to carry out high pressure dry-air blast purging, anhydrous 15~30min of post-purge
After close.
Step 5: the maintenance of high pressure dry-air blast, the power station water-steam system 24 for participating in maintenance are continually fed into high pressure dry-air blast, are periodically supervising
Location is set and the relative humidity of high pressure dry-air blast outlet port detection exhaust, the relative humidity of exhaust can be turned down suitably less than 50%
Intake valve 12.
It is as shown in table 2 the present embodiment high pressure dry-air blast maintenance monitoring position and exhaust position monitoring record.
2 embodiment of table, 2 high pressure dry-air blast maintenance monitoring position and exhaust position monitoring record (totally 26 weeks)
Claims (8)
1. a kind of power station water-steam system high pressure dry-air blast maintenance system, it is characterised in that: including pressure-air preparation system and with
Its pressure-air purification system connected, the high pressure dry-air blast maintenance monitoring system being installed on admission line；
The pressure-air preparation system includes oil free screw air compressor machine (1)；The pressure-air purification system includes successively connecting
Stainless steel air accumulator (3), freezing type drier (8), the filter (10) connect；The high pressure dry-air blast maintains monitoring system, including
Be arranged on the admission line (17) after filter (10) high pressure dry-air blast maintenance during monitor respectively pressure-air flow,
Relative humidity, the flowmeter (16) of temperature and pressure, humidometer (15), thermometer (14) and pressure gauge (13)；It was located at
Intake valve (12) are additionally provided on admission line (17) after filter (10)；High pressure dry-air blast enter filter (10) removed water,
Dedusting, oil removing, the high pressure dry-air blast through water removal, oil removing, dedusting pass through admission line (17), the power station water-steam system of participation maintenance
(24) nitrogen fill valve or thin, discharging valve (18) enters the power station water-steam system (24) for participating in maintenance, passes through the power station for participating in maintaining
Emptying valve or thin, discharging valve (21) discharge in water-steam system (24) participate in the power station water-steam system (24) of maintenance outside, to ginseng
The maintenance of high pressure dry-air blast is carried out with the power station water-steam system (24) of maintenance.
2. a kind of power station water-steam system high pressure dry-air blast maintenance system according to claim 1, it is characterised in that: oil free screw
Blowdown valve (6) are arranged by the first connecting pipe (2) connection stainless steel air accumulator (3), stainless steel air accumulator (3) in air compressor machine (1),
Periodically to drain, blowdown, and safety valve (5) and pressure gauge (4) are set；Freezing type drier (8) passes through the second connecting pipe (7)
It exports and connects with stainless steel air accumulator (3), removed water for pressure-air；Freezing type drier (8) outlet and filter (10) are logical
Cross third connecting pipe (9) connection.
3. a kind of power station water-steam system high pressure dry-air blast maintenance system according to claim 1, it is characterised in that: described oil-free
The design parameter of screw air compressor (1) and admission line (17) meets outlet 0.6~1.0MPa of high-pressure air pressure, and flow meets
Participate in the power station water-steam system (24) of maintenance 1~5 air displacement rate per hour；Freezing type drier (8) operating pressure 0.5
~1.5MPa, 0~45 DEG C of intake air temperature, outlet air relative humidity is less than 10%；Filter (10) outlet air oil content is small
In 2ppb, impurity content is less than 1ppb.
4. a kind of power station water-steam system high pressure dry-air blast maintenance system according to claim 1, it is characterised in that: the participation
The power station water-steam system (24) of maintenance is by nitrogen fill valve or dredges, discharging valve (18) connection admission line (17), participates in the electricity of maintenance
It stands and is disposed with valve (28), reverse stop valve (29), emptying valve from the inlet to the outlet on the pipeline of water-steam system (24)
(26), thin, discharging valve (27), the first emptying valve or thin, discharging valve (20) and the second emptying valve are dredged, discharging valve (21)；
The power station water-steam system (23) and second that the power station water-steam system (24) for participating in maintenance is not involved in maintenance with adjacent first is not joined
The first separation valve door (19) and the second separation valve door are respectively arranged on the pipeline connecting with the power station water-steam system (25) of maintenance
(22)。
5. the maintenance method of the described in any item power station water-steam system high pressure dry-air blast maintenance systems of Claims 1-4, feature exist
In: by being passed through high pressure dry-air blast into the power station water-steam system (24) for participating in maintenance, reduce relative air humidity in water-steam system
It carries out dry-air blast maintenance, includes the following steps:
Step 1: steam discharge discharges water, when power station is stopped transport, participate in the power station water-steam system (24) of maintenance emptying valve (26) and it is thin,
Discharging valve (27) is opened, and is carried out steam discharge by emptying valve (26) and thin, discharging valve (27), is discharged water；
Step 2: the foundation in high pressure dry-air blast maintenance circuit: opening the valve (28) in the power station water-steam system (24) for participating in maintenance,
The power station water-steam system (24) for participating in maintenance is connected；The first separation valve door (19) and the second separation valve door (22) are closed,
The power station water-steam system (23) and second for being not involved in maintenance to first are not involved in the power station water-steam system (25) of maintenance and participate in protecting
Feeding power station water-steam system (24) is isolated, and dry-air blast maintenance circuit: atmosphere → oil free screw air compressor machine (1) → stainless steel is established
Air accumulator (3) → freezing type drier (8) → filter (10) → admission line (17) → participation maintenance power station water-steam system
(24) → high pressure dry-air blast outlet → atmosphere；
Step 3: logical high pressure dry-air blast by starting oil free screw air compressor machine (1), and adjusts intake valve (12) aperture, maintains pressure
Meter (13) registration is 0.6~1.0MPa, and flow is the interior air 1~5 of power station water-steam system (24) that displacement participates in maintenance per hour
It is secondary；
Step 4: high pressure dry-air blast mobility status inspection is successively detected the power station steam system for participating in maintenance by high pressure dry-air blast maintenance circuit
It unites (24) interior emptying valve (26) and dredges, the air mobility status of discharging valve (27), close emptying valve after seeing air flowing
(26) it and dredges, discharging valve (27)；If thin, discharging valve (27) there are flowing out, should continue to carry out high pressure dry-air blast purging, anhydrous post-purge
It is closed after 15~30min；
Step 5: the maintenance of high pressure dry-air blast, the power station water-steam system (24) for participating in maintenance are continually fed into high pressure dry-air blast, are periodically monitoring
The relative humidity of position and the detection exhaust of high pressure dry-air blast outlet port, the relative humidity of exhaust then turn down intake valve less than 50%
(12)。
6. maintenance method according to claim 5, it is characterised in that: high pressure dry-air blast Inlet Position is the power station for participating in maintenance
Nitrogen fill valve or thin, discharging valve (18) in water-steam system (24)；It monitors position and high pressure dry-air blast exhaust position is respectively to participate in protecting
The first emptying valve or thin, discharging valve (20) and second row air valve or thin, discharging valve in feeding power station water-steam system (24)
(21)；The monitoring position participates in relatively wet in the power station water-steam system (24) of maintenance during being used to monitor the maintenance of high pressure dry-air blast
Degree.
7. maintenance method according to claim 5, it is characterised in that: according to monitoring position and high pressure dry-air blast exhaust position
Relative humidity adjusts high pressure dry-air blast intake.
8. maintenance method according to claim 5, it is characterised in that: maintained using high pressure dry-air blast, guarantee dry-air blast pressure
Power is enough to open the reverse stop valve (29) in the power station water-steam system (24) for participating in maintenance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289119.8A CN109908714B (en) | 2019-04-11 | 2019-04-11 | High-pressure dry air maintenance system and maintenance method for water vapor system of power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910289119.8A CN109908714B (en) | 2019-04-11 | 2019-04-11 | High-pressure dry air maintenance system and maintenance method for water vapor system of power station |
Publications (2)
| Publication Number | Publication Date |
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| CN109908714A true CN109908714A (en) | 2019-06-21 |
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