CN206613784U - Extra-supercritical unit high pressure extraction heat regenerative system - Google Patents
Extra-supercritical unit high pressure extraction heat regenerative system Download PDFInfo
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- CN206613784U CN206613784U CN201720283562.0U CN201720283562U CN206613784U CN 206613784 U CN206613784 U CN 206613784U CN 201720283562 U CN201720283562 U CN 201720283562U CN 206613784 U CN206613784 U CN 206613784U
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Abstract
The utility model discloses a kind of extra-supercritical unit high pressure extraction heat regenerative system, including multistage pressure heater, each high-pressure heater vapour side is connected by corresponding normal drain pipe with rear stage high-pressure heater vapour side respectively, and final stage high-pressure heater vapour side is connected by corresponding normal drain pipe with oxygen-eliminating device；Oxygen-eliminating device is connected with condensate system；Wherein, condensate system is connected by condensate temporary pipeline with the emergent drain pipe of chopped-off head high-pressure heater；The extraction line of high-pressure heaters at different levels is directly communicated to waste liquid pool by corresponding waste liquid temporary pipeline respectively.The utility model passes through condensate temporary pipeline; condensate is introduced into heat regenerative system by the emergent drain pipe added through chopped-off head height; the convenient cleaning implemented in the pusher side alkali cleaning stage to heat regenerative system; avoid unit from being stopped for a long time because of system flush in underload section, protection is served to turbine body equipment.
Description
Technical field
The utility model belongs to extra-supercritical unit Capital Construction Debugging technical field, and in particular to face in wash phase super
The structure of boundary's unit high pressure extraction heat regenerative system is improved.
Background technology
Conventional capital generating unit rinses most of using old traditional handicraft, i.e. unit to high pressure extraction heat regenerative system and equipment
It is specific to rinse using unit itself vapour source to drawing gas heat regenerative system pipeline and equipment is rinsed in the operation of about 20% load condition
The structure of equipment such as Fig. 1（It is for the formal pipeline of heat regenerative system that draws gas at dotted line in figure at interim flushing line, solid line）It is shown, tool
Body purging method is：First single height is added respectively and is rinsed, flushing flow to final stage certainly step by step by normally hydrophobic again after finishing
Gao Jia, designs interim flushing line on final stage height plus emergent drain pipe, the pipeline is connected into catch-basin is rinsed, rinses extremely
It is hydrophobic just to allow to be recycled to oxygen-eliminating device when water quality test meets the requirements.
But there is following obvious deficiency in the developing technique：
1st, unit must carry out the flushing of high-pressure heater vapour side system in low load condition for a long time, to meet flushing
The safety of parameter request and pipe-line equipment, steam turbine is inevitable to be in unfavorable operating mode area for a long time, and the long-play of underload is serious
Influence the turbine blade life-span.The method must arrange shutdown to resume work, and add unit a whole set of test run cycle, time cost
Dramatically increase.
2nd, dead angle is left during system flush, No. three high oxygen-eliminating device section pipeline that adds to can not be rinsed, with unit
The increase of capacity, the system pipeline is also quite remote apart from oxygen-eliminating device distance, and preresearch estimates is about more than 40 meter, the rubbish meeting in the pipeline
It is directly entered oxygen-eliminating device.
3rd, during system flush, because using formal system valve, the rubbish meeting block system of system flush is hydrophobic
Valve, causes high adding system hydrophobic valve bite, the potential safety hazard caused to unit operation.
In order to avoid unit is rinsed in low load condition for a long time, also there is capital generating unit in subsystem debugging process
In, interim vapour source (auxiliary steam) is connect by auxiliary vapour steam supply temporary pipeline 4 to height plus vapour side system pipeline and is rinsed, work is rinsed
Skill flow such as Fig. 2（It is for the formal pipeline of heat regenerative system that draws gas at dotted line in figure at interim flushing line, solid line）It is shown.But it is this
Purging method to the requirement of auxiliary steam amount than larger, during heater system equipment turnover water temperature difference it is big, height plus normal hydrophobic
Pipeline can not be rinsed effectively, there is consequential damages influence on heater device, and be put into practice by several Engineering Projects,
Whole high plus vapour side system developing result is undesirable.In unit the whole series debugging process, the high frequently report of entrance of water-supplying pump filter screen differential pressure
Alert, installation unit gives pump intake filter screen rotation cleaning, live filter screen to find that internal is all Xiu Pi ﹑ scums after taking apart to two respectively
The rubbish such as sand, unit is because to pump intake filter net jam, causing the serious cavitation of feed pump, causing boiler feedwater most serious of all
Flow is low, boiler main fuel trip tripping operation, and very big hidden danger is brought to unit equipment safe operation.
The content of the invention
The purpose of this utility model is good there is provided a kind of cleaning performance in order to solve defect present in prior art, and
Extra-supercritical unit high pressure extraction heat regenerative system without potential safety hazard.
In order to achieve the above object, the utility model provides a kind of extra-supercritical unit high pressure extraction heat regenerative system, bag
Multistage pressure heater is included, each high-pressure heater vapour side in addition to final stage high-pressure heater passes through corresponding normal drain pipe respectively
It is connected with rear stage high-pressure heater vapour side, final stage high-pressure heater vapour side passes through corresponding normal drain pipe and oxygen-eliminating device phase
Even；Oxygen-eliminating device is connected with condensate system；Wherein, condensate system passes through condensate temporary pipeline and chopped-off head high-pressure heater
Emergent drain pipe is connected；The extraction line of high-pressure heaters at different levels is directly communicated to useless by corresponding waste liquid temporary pipeline respectively
Liquid pool.
The normal drain pipe of high-pressure heaters at different levels in addition to final stage high-pressure heater passes through corresponding high plus vapour side respectively
Temporary pipeline is joined directly together with hindering with rear stage heater vapour side without circulation.
The condenser of condensate system passes sequentially through condensate pump, condensing water conduit, condensate polishing treatment bypass, condensate
Desuperheat waterpipe is connected with condensate temporary pipeline.
Except being equipped with temporary valve at the emergent drain pipe of the high-pressure heaters at different levels of chopped-off head high-pressure heater, and by facing
Shi Guanlu is connected with unit rhone.
The utility model has advantages below compared with prior art：
1st, all formal drain regulating valves doors in existing heat regenerative system have been removed, it is to avoid damage of the rinse stage to valve
It is bad, it is ensured that unit operation stage valve reliable in action；Emergency steam trap adjusting valve door is substituted for temporary valve simultaneously, has both avoided flushing
The damage of stage alignment type drain valve, can pass through temporary valve regulating pondage again.
2nd, by condensate temporary pipeline, condensate is introduced heat regenerative system by the emergent drain pipe through chopped-off head high-pressure heater
In, the convenient cleaning implemented in the pusher side alkali cleaning stage to heat regenerative system, it is to avoid unit is when underload section is long because of system flush
Between stop, protection is served to turbine body equipment, while the steam that it also avoid a large amount of high-quality is discharged because of flushing
Fall, energy-saving effect is played for unit.
3rd, the utility model is improved the structure of extra-supercritical unit high pressure extraction heat regenerative system, flushing is arranged in pusher side
The alkali cleaning stage, it is to avoid a whole set of water punching for starting the starting stage and pipeline are resumed work, hence it is evident that shorten a whole set of startup time.
Brief description of the drawings
Fig. 1 is the structural representation figure of existing extra-supercritical unit high pressure extraction heat regenerative system；
Fig. 2 is another structural representation of existing extra-supercritical unit high pressure extraction heat regenerative system；
Fig. 3 is the structural representation of the utility model extra-supercritical unit high pressure extraction heat regenerative system.
In figure, 1-#1 is high to be added, and 2-#2 is high to be added, and 3-#3 is high to be added, and 11-#1 is high to add pump-line, and 21-#2 is high to add pump-line,
31-#3 height plus pump-line, 12-#1 height plus emergent drain pipe, 22-#2 height plus emergent drain pipe, 32-#3 height plus emergent drain
Pipe, 13-#1 height plus normal drain pipe, 23-#2 height plus normal drain pipe, 33-#3 height plus normal drain pipe, the auxiliary vapour steam supplies of 4- are interim
Pipeline, 5- condensate temporary pipelines, 6- waste liquid temporary pipelines, 7- height plus vapour side temporary pipeline, 8- oxygen-eliminating devices.
Embodiment
The utility model is described in detail below in conjunction with the accompanying drawings.
Add as shown in figure 3, the utility model extra-supercritical unit high pressure extraction heat regenerative system includes #1 height（Hyperbaric heating
Device）1st, #2 height Jia 2, #3 height Jia 3, #1 height adds pump-line 11, #1 high plus emergent drain pipe 12, #1 height plus normal drain pipe 13, #
2 height add pump-line 21, #2 are high to add emergent drain pipe 22, #2 are high to add normal drain pipe 23, #3 are high to add pump-line 31, #3 are high to add
Emergent drain pipe 32, #3 height plus normal drain pipe 33, oxygen-eliminating device 8, condensate system, condensate temporary pipeline 5, high plus vapour side are faced
Shi Guandao 7 and waste liquid temporary pipeline 6.The condenser of condensate system passes sequentially through condensate pump, condensing water conduit, condensate fine
Processing bypass is connected with condensate desuperheat waterpipe；Condensate desuperheat waterpipe passes through condensate temporary pipeline 5 and #1 height plus danger
Anxious drain pipe 12 is connected；After each high plus normal drain pipe 13,23 adds vapour side temporary pipeline 7 and is adjacent by corresponding height respectively
One height plus vapour side 2,3 are joined directly together；Each high plus extraction line 11,21,31 is directly connected by corresponding waste liquid temporary pipeline 6 respectively
Pass to waste liquid pool.
The structure of the utility model extra-supercritical unit high pressure extraction heat regenerative system is improved and mainly tried out in wash phase, should
Cleaning is arranged in the pusher side alkali cleaning stage, comprises the following steps：
1st, pre-preparation works：Take out the nozzle in oxygen-eliminating device 8（Nozzle cleaning is recovered after terminating）；Remove all high plus critical
Drain regulating valve, installs emergency hand isolating valve additional, removes all high plus normal drain regulating valve, is dredged except #3 height is added at oxygen-eliminating device
Water regulating valve installs emergency hand valve additional, using the high plus short circuit of vapour side temporary pipeline 7 at other normal drain regulating valves；To be drawn gas master
Pipeline is disconnected at each section of electrically operated gate, and waste liquid pool is connected to by waste liquid temporary pipeline 6；Condensate water source is interim by condensate
Pipeline 5 accesses heat regenerative system of drawing gas through #1 height plus emergent drain pipe 12, and bleed steam pipework suspension and support is true in following flushing process
Recognize reinforcing.Temporary valve is installed at #2 height plus emergent drain pipe 22, #3 height plus emergent drain pipe 32, and machine is connected to by interim pipe
Group rhone.
2nd, the first stage washes：
First loop：Height plus extraction steam pipe Lu ﹑ height plus vapour side and crisis hydrophobic pipeline are rinsed
The high adding system flows of #1：Condenser → condensate pump → condensing water conduit → condensate polishing treatment bypass → condensate
Desuperheat waterpipe → 5 → #1 of condensate temporary pipeline height plus 12 → #1 of emergent drain pipe height add（High-pressure heater）1 vapour side → #1
High plus 11 → waste liquid of extraction line temporary pipeline 6 → be emitted into waste liquid pool
The high adding system flows of #2:Condenser → condensate pump → condensing water conduit → condensate polishing treatment bypass → condensate
Desuperheat waterpipe → 5 → #1 of condensate temporary pipeline height plus 12 → #1 of emergent drain pipe height plus 1 vapour side → #1 are high plus normal hydrophobic
Pipe 13 → height plus the high 2 vapour sides that add of vapour side 7 → #2 of temporary pipeline → #2 height plus emergent drain pipe 22 → are emitted into catch-basin, and (#2 height adds
2 vapour sides → #2 height plus 21 → waste liquid of extraction line temporary pipeline 6 → are emitted into waste liquid pool)
The high adding system flows of #3:Condenser → condensate pump → condensing water conduit → condensate polishing treatment bypass → condensate
Desuperheat waterpipe → 5 → #1 of condensate temporary pipeline height plus 12 → #1 of emergent drain pipe height plus 1 vapour side → #1 are high plus normal hydrophobic
Pipe 13 → height plus vapour side 7 → #2 of temporary pipeline height plus 2 vapour sides → #2 height plus normal drain pipe 23 → height plus vapour side temporary pipeline 7
→ #3 height plus 3 vapour sides → #3 height plus emergent drain pipe 32 → are emitted into catch-basin
(#3 height plus 3 vapour sides → #3 height plus 31 → waste liquid of extraction line temporary pipeline 6 → is emitted into waste liquid pool)
Second servo loop：Whole high-pressure extraction system circulation is rinsed
System flow：Condenser → condensate pump → condensing water conduit → condensate polishing treatment bypass → condensate desuperheating water
Pipeline → 5 → #1 of condensate temporary pipeline height plus 12 → #1 of emergent drain pipe height plus 1 vapour side → #1 height plus normal drain pipe 13 →
Height plus vapour side 7 → #2 of temporary pipeline height add 2 vapour sides → #2 height plus normal drain pipe 23 → height plus vapour side 7 → #3 of temporary pipeline height to add
3 vapour sides → #3 height plus 8 → low pressure feed water of normal 33 → oxygen-eliminating device of drain pipe pipe → interim pipe → condenser.
In the stage flushing process, rinse water uses demineralized water, and is rinsed using big flow, flow-changing water, rushes
Flow control is washed in 300~500m3/h。
3rd, second stage alkali cleaning：
According to the alkali wash water of alkali cleaning arrangements respective concentration.
Alkali wash water is filled in toward system, the valve and #2 height plus emergent drain closed at each high plus extraction line 11,21,31
Temporary valve at pipe 22, #3 height plus emergent drain pipe 32, by condensate pump, by 300 m3/ h flows are circulated to system
Alkali cleaning, circulation flushing opens the valve and #2 height plus emergent drain pipe at each high plus extraction line 11,21,31 after 8-10 hours
22nd, #3 height adds the temporary valve at emergent drain pipe 32, and the alkali lye discharge in system is finished.
4th, the phase III washes：
According to step（2）The flushing principle of middle first stage washing, water-filling flushing is entered to system and equipment again, to flushing
Water quality range estimation is limpid.
Claims (4)
1. a kind of extra-supercritical unit high pressure extraction heat regenerative system, including multistage pressure heater, each high-pressure heater vapour side point
It is not connected by corresponding normal drain pipe with rear stage high-pressure heater vapour side, final stage high-pressure heater vapour side passes through corresponding
Normal drain pipe is connected with oxygen-eliminating device；Oxygen-eliminating device is connected with condensate system；It is characterized in that：The condensate system passes through solidifying
Temporary pipeline is born water with the emergent drain pipe of chopped-off head high-pressure heater to be connected；The extraction line of high-pressure heaters at different levels passes through respectively
Corresponding waste liquid temporary pipeline is directly communicated to waste liquid pool.
2. extra-supercritical unit high pressure extraction heat regenerative system according to claim 1, it is characterised in that：Except final stage high pressure adds
Outside hot device, the normal drain pipe of remaining high-pressure heater at different levels is added by corresponding high plus vapour side temporary pipeline with rear stage respectively
Hot device vapour side is joined directly together with hindering without circulation.
3. extra-supercritical unit high pressure extraction heat regenerative system according to claim 2, it is characterised in that：The condensation water system
The condenser of system passes sequentially through condensate pump, condensing water conduit, condensate polishing treatment bypass, condensate desuperheat waterpipe with condensing
Water temporary pipeline is connected.
4. extra-supercritical unit high pressure extraction heat regenerative system according to claim 3, it is characterised in that：Except chopped-off head high pressure adds
Temporary valve is equipped with the emergent drain pipe of the high-pressure heaters at different levels of hot device, and passes through interim pipeline and unit rhone phase
Even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720283562.0U CN206613784U (en) | 2017-03-22 | 2017-03-22 | Extra-supercritical unit high pressure extraction heat regenerative system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720283562.0U CN206613784U (en) | 2017-03-22 | 2017-03-22 | Extra-supercritical unit high pressure extraction heat regenerative system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206613784U true CN206613784U (en) | 2017-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720283562.0U Active CN206613784U (en) | 2017-03-22 | 2017-03-22 | Extra-supercritical unit high pressure extraction heat regenerative system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206613784U (en) |
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2017
- 2017-03-22 CN CN201720283562.0U patent/CN206613784U/en active Active
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| GR01 | Patent grant | ||
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Address after: 210033 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee after: Guodian Nanjing electric power test & Research Co., Ltd. Address before: 210033 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: Nanjing Power Equipment Quality & Performance Test Center |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210033 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee after: Guoneng Nanjing Electric Power Test Research Co.,Ltd. Address before: 210033 fairyland Road, Qixia District, Nanjing, Jiangsu Province, No. 10 Patentee before: GUODIAN NANJING ELECTRIC POWER TEST RESEARCH Co.,Ltd. |