CN102817644B - Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit - Google Patents
Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit Download PDFInfo
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- CN102817644B CN102817644B CN201210280846.6A CN201210280846A CN102817644B CN 102817644 B CN102817644 B CN 102817644B CN 201210280846 A CN201210280846 A CN 201210280846A CN 102817644 B CN102817644 B CN 102817644B
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Abstract
The invention discloses a flushing system of a steam side of a high-pressure heater of a steam turbine generator unit, which comprises an auxiliary steam header and the high-pressure heater, wherein the auxiliary steam header is connected with one end of the high-pressure heater by a first connecting device; and the other end of the high-pressure heater is connected with a trench by a second connecting device. The invention adopts auxiliary steam as a working medium to flush the steam side of the high-pressure heater of the steam turbine generator unit, is higher in temperature and pressure as well as better in flushing effect, and has a certain silicon washing function.
Description
Technical field
The present invention relates to a kind of Turbo-generator Set, particularly relate to a kind of rinse-system and purging method thereof of Turbo-generator Set high-pressure heater vapour side.
Background technique
At present, for newly-built Turbo-generator Set, because high-pressure heater vapour side, high-pressure heater admission pipeline and drain water piping are not rinsed (object of stokehold chemical cleaning is water side ducts system) in chemical cleaning.High-pressure heater, in the processes such as manufacture, storage and installation, can produce the products such as scale, welding slag, greasy dirt and corrosion and scaling in its metal surface.Put into operation first high-pressure heater time must pollute the whole boiler circuit of unit, cause condensate pump and entrance of water-supplying pump filter net jam, final hinder unit band high load.
Solve the problem, traditional way is: one, after high-pressure heater completion system is installed, and adopts water to rinse or alkali washing method to the vapour side of high-pressure heater and drain water piping.But these class methods not only will solve drainage problem, and waterpipe will be installed into.In addition every platform high-pressure heater all will form interim independent loop, adopts alkali cleaning then will provide cleaning case and washery pump.Such system complex, workload are large, also can produce poisonous and harmful effulent afterwards.Two, at the unit a whole set of start-up course initial stage, unit band 10% initial load, by temporary drainage pipeline, carries out hot flushing to the vapour side of high-pressure heater and drain water piping qualified to drain water quality, then carries out working medium recovery by unit normal system.But; these class methods will install temporary drainage pipeline and interim floss hole; and compressor emergency shutdown must be arranged once in unit starting phase process; for recovering the high temporary drainage pipeline adding vapour side and drain water piping flushing; simultaneously to the pollution that surrounding environment is brought, and the not high potential safety hazard with there is interim releasing system of efficiency.
Summary of the invention
The technical problem to be solved in the present invention is to overcome complicated, the seriously polluted and defect that efficiency is not high of rinse-system in prior art, providing a kind of rinse-system and purging method thereof of Turbo-generator Set high-pressure heater vapour side.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of rinse-system of Turbo-generator Set high-pressure heater vapour side, its feature is, it comprises auxiliary vapour header and a high-pressure heater, described auxiliary vapour header is connected with one end of described high-pressure heater by one first connection set, and the other end of described high-pressure heater is connected to a trench by one second connection set.
Preferably, described first connection set comprises one first temporary pipeline and a high-pressure heater extraction line that are interconnected.
Preferably, described high-pressure heater extraction line is provided with a pressure regulator valve and/or a flow control valve.
Preferably, described second connection set comprises the emergent drain pipeline and one second temporary pipeline that are interconnected.
Preferably, each pipeline in described rinse-system is provided with some hydrophobic points, and interval 30m-50m between hydrophobic point described in each.
Herein, the setting of described hydrophobic point spreads all over the pipeline of whole system, and specifically how to arrange and need for site environment, be generally the minimum point at a segment pipe, usual each 30m-50m arranges one; Secondly, the engineering staff of professional domain it should be understood that the deployment scenarios of hydrophobic point is determined by site environment.
Present invention also offers a kind of purging method adopting above-mentioned rinse-system, its feature is, it specifically comprises the following steps:
S
1, operator check described rinse-system, make it be in stand-by state;
S
2, by the steam supply valve open of described auxiliary vapour header, heating coil carries out to described Turbo-generator Set high-pressure heater vapour side hydrophobic;
S
3, open the steam supply valve of large described auxiliary vapour header gradually, until described steam supply valve wide open, described Turbo-generator Set high-pressure heater vapour side is rinsed;
S
4, described step S
3after carrying out 10 ~ 15 minutes, and judge that whether the carbonated drink that described trench is discharged is clean; If so, then step S is entered
5; If not, then close described steam supply valve, stop flushing 3 ~ 5 minutes, return step S
3;
S
5, flushing process terminates.
Preferably, described step S
1in further comprising the steps of: S
11, the temperature of the auxiliary steam in described auxiliary vapour header is controlled at 280 DEG C ~ 300 DEG C, Stress control is at 0.8MPa ~ 1.0MPa.
Preferably, described step S
2described in the steam supply valve open 30% of auxiliary vapour header, the flow of auxiliary steam is 8t/h-10t/h.
Preferably, described step S
2further comprising the steps of afterwards:
S
21, judge whether described heating coil hydrophobic abundant; If so, then step S is entered
22; If not, then step S is returned
2;
S
22, whether each hydrophobic point checked in described rinse-system all emit steam; If so, then step S is entered
3; If not, then step S is returned
2.
Preferably, described step S
3described in the vapor (steam) temperature of flushing process be 280 DEG C ~ 320 DEG C, pressure is 0.8MPa ~ 1.0MPa, and flow is 25t/h ~ 30t/h.
Preferably, described step S
3in further comprising the steps of:
S
31, the pressure regulator valve adjusted on described high-pressure heater extraction line, control described auxiliary steam pressure stability;
S
32, whether judge to discharge carbonated drink in described trench normal; If so, then step S is entered
4; If not, then step S is returned
31.
In the present invention, above-mentioned optimum condition can combination in any on the basis meeting related domain general knowledge, obtains each preferred embodiment of the present invention.
Positive progressive effect of the present invention is:
One, the present invention adopts auxiliary steam to be that working medium is rinsed Turbo-generator Set high-pressure heater vapour side, and have higher temperature and pressure, developing result is relatively good, and has and certain wash silicon effect.
Two, rinse the steam of employing from auxiliary vapour header, need not specially arrange, cost is low and easy to use.
Three, rinse-system adopts the workload of interim pipe little, and the Recovery time of having rinsed rear interim pipe is short.
Four, to have tried to shoot in advance because of flushing high adding system, problem can have been exposed in advance, for formally putting into operation of adding of height creates conditions.
Five, reduce the blocking of water of condensation because high adding system foreign material cause and water supply system filter screen, avoid the operating mode of shutting down because of filter net jam, thus reduce the debugging unit number of starts, shorten the debugging efforts cycle, save the engineering construction time.
Six, flushing process is not to environmental emission poisonous and harmful substance, whole process safety, environmental protection.
Seven, shorten the time that HP heater drainage reclaims, save and use water in a large number.
Accompanying drawing explanation
Fig. 1 is the structural representation of the preferred embodiment of the rinse-system of Turbo-generator Set high-pressure heater vapour side of the present invention.
Fig. 2 is the flow chart of the preferred embodiment of purging method of the present invention.
Embodiment
Present pre-ferred embodiments is provided, to describe technological scheme of the present invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1, the rinse-system of Turbo-generator Set high-pressure heater vapour side of the present invention, it comprises auxiliary vapour header 1 and a high-pressure heater 4.Wherein, auxiliary vapour header 1 is connected with one end of high-pressure heater 4 by one first connection set, and the other end of high-pressure heater 4 is connected to a trench 7 by one second connection set.One first temporary pipeline 2 and the high-pressure heater extraction line 3 that described first connection set is preferably interconnected.Emergent drain pipeline 5 and one second temporary pipeline 6 that described second connection set is preferably interconnected.
In addition, high-pressure heater extraction line 3 being provided with a pressure regulator valve and/or a flow control valve (not shown), vapor pressure and the flow of high-pressure heater 4 can be controlled to enter by arranging described pressure regulator valve and/or described flow control valve effectively easily.
Each pipeline (such as the first temporary pipeline 2, high-pressure heater extraction line 3, emergent drain pipeline 5 and the second temporary pipeline 6) in described rinse-system is provided with some hydrophobic points, and interval 30m-50m between hydrophobic point described in each.Herein, the setting of described hydrophobic point spreads all over the pipeline of whole system, specifically how to arrange and needs to be determined by site environment.
Usually to before newly-built power plant's test run, need that vapour side system is added to height and rinse.Adopt above-mentioned Turbo-generator Set high-pressure heater flushing vapor side system, steam is supplied by the auxiliary vapour header 1 of unit, steam is by the first temporary pipeline 2, high-pressure heater extraction line 3, enter high-pressure heater 4 vapour side to rinse whole system, steam after flushing, by emergent drain pipeline 5, second temporary pipeline 6 of high-pressure heater, finally drains into trench 7.
As shown in Figure 2, the invention also discloses a kind of purging method adopting the rinse-system of described Turbo-generator Set high-pressure heater vapour side, it specifically comprises the following steps:
Step 100, operator check described rinse-system, make it be in stand-by state.
Before described purging method starts, whether install complete by each equipment in hand inspection whole system and connected pipeline thereof, and confirm imperforation place, determine the generation that can not cause steam leakage situation, the water filling of high-pressure heater water side.
Step 101, control the temperature of the auxiliary steam in described auxiliary vapour header at 280 DEG C ~ 300 DEG C, Stress control is at 0.8MPa ~ 1.0MPa.
Step 102, by the steam supply valve open of described auxiliary vapour header.
Herein, described auxiliary vapour header is in crack state, and such as, by the aperture of described steam supply valve open 30%, when effectively can ensure heating coil, steam flow is unlikely to impact e-quipment and pipe.
Step 103, carries out heating coil to described Turbo-generator Set high-pressure heater vapour side hydrophobic.
Before System steam rinses, abundant hydrophobic heating coil should be carried out, avoid pipeline generation high vibration.Preferably, steam parameter when heating coil is hydrophobic is temperature 280 DEG C ~ 320 DEG C, and pressure 0.8MPa ~ 1.0MPa, flow is about 1/3 of normal flushing flow rate 25t/h, and namely the flow of auxiliary steam is preferably 8t/h-10t/h.
Step 104, judges whether described heating coil is hydrophobic abundant; If so, then step 105 is entered; If not, then step 103 is returned.
Step 105, checks whether each hydrophobic point in described rinse-system all emits steam; If so, then step 106 is entered; If not, then step 103 is returned.
Check in engineering reality and be generally hand inspection (professional and technical personnel), hydrophobic point is mainly arranged in the minimum point of pipeline, and general pipeline about arranges one every 30m ~ 50m.
Step 106, opens the steam supply valve of large described auxiliary vapour header gradually, until described steam supply valve wide open, rinses described Turbo-generator Set high-pressure heater vapour side.
After heating coil terminates, first time carries out examination and blows, and slowly improves flushing pressure to setting value, checks that whole rinse-system has between No leakage and system simultaneously and alter vapour.The vapor (steam) temperature of described flushing process is 280 DEG C ~ 320 DEG C, and pressure is 0.8MPa ~ 1.0MPa, and flow is 25t/h ~ 30t/h.
Step 107, adjusts the pressure regulator valve on described high-pressure heater extraction line, controls described auxiliary steam pressure stability.
Whether normal step 108, judge to discharge carbonated drink in described trench; If so, then step 109 is entered; If not, then step 107 is returned.
Step 109, judges that whether the carbonated drink that described trench is discharged is clean; If so, then step 111 is entered; If not, then step 110 is entered.
Step 110, closes described steam supply valve, stops flushing 3 ~ 5 minutes, then returns step 106, enters next circulation.
Particularly, each steam flush time is 10 ~ 15 minutes, and whether the carbonated drink of simultaneously observing the discharge of described trench is clean, terminates if then show to rinse; If not then stop flushing entering next circulation afterwards in 3 ~ 5 minutes.Generally, empirically and rinse well to ensure, substantially all need to carry out 3 ~ 5 times, each to rinse interval time be 5 ~ 10 minutes, until floss hole carbonated drink is clean.Adopt this interval repeatedly to rinse and the method for cooling, be conducive to metallic oxide on tube wall and impurity comes off, taken away by steam.In the process, preferably a control valve (not shown) is all set on auxiliary vapour header 1 and extraction line 3.Wherein, the valve on auxiliary vapour header 1 is in order to rinse interim installation, and the valve on extraction line 3 is formal.Both can be manually operated valve or mortor operated valve, and can in order to pilot pressure, flow.Temporary valve on the auxiliary vapour header 1 of heating coil stage general operation, formal unlatching of rinsing and stopped process rely on the formal valve operation on extraction line 3 (make operation more convenient).Certainly, in fact above-mentioned two valves all may be used for opening or stopping flushing process.
Step 111, flushing process terminates.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these mode of executions, but these change and amendment all falls into protection scope of the present invention.
Claims (6)
1. one kind adopts the purging method of the rinse-system of Turbo-generator Set high-pressure heater vapour side, it is characterized in that, described rinse-system comprises auxiliary vapour header and a high-pressure heater, described auxiliary vapour header is connected with one end of described high-pressure heater by one first connection set, and the other end of described high-pressure heater is connected to a trench by one second connection set; Described purging method specifically comprises the following steps:
S
1, operator check described rinse-system, make it be in stand-by state;
S
2, by the steam supply valve open of described auxiliary vapour header, heating coil carries out to described Turbo-generator Set high-pressure heater vapour side hydrophobic;
S
3, open the steam supply valve of large described auxiliary vapour header gradually, until described steam supply valve wide open, described Turbo-generator Set high-pressure heater vapour side is rinsed;
S
4, described step S
3carry out 10 ~ 15 minutes, and judge that whether the carbonated drink that described trench is discharged is clean; If so, then step S is entered
5; If not, then close described steam supply valve, stop flushing 3 ~ 5 minutes, return step S
3;
S
5, flushing process terminates.
2. purging method as claimed in claim 1, is characterized in that, described step S
1in further comprising the steps of: S
11, the temperature of the auxiliary steam in described auxiliary vapour header is controlled at 280 DEG C ~ 300 DEG C, Stress control is at 0.8MPa ~ 1.0MPa.
3. purging method as claimed in claim 2, is characterized in that, described step S
2described in the steam supply valve open 30% of auxiliary vapour header, the flow of auxiliary steam is 8t/h-10t/h.
4. purging method as claimed in claim 3, is characterized in that, described step S
2further comprising the steps of afterwards:
S
21, judge whether described heating coil hydrophobic abundant; If so, then step S is entered
22; If not, then step S is returned
2;
S
22, whether each hydrophobic point checked in described rinse-system all emit steam; If so, then step S is entered
3; If not, then step S is returned
2.
5. purging method as claimed in claim 1, is characterized in that, described step S
3described in the vapor (steam) temperature of flushing process be 280 DEG C ~ 320 DEG C, pressure is 0.8MPa ~ 1.0MPa, and flow is 25t/h ~ 30t/h.
6. purging method as claimed in claim 5, is characterized in that, described step S
3in further comprising the steps of:
S
31, the pressure regulator valve adjusted on described high-pressure heater extraction line, control described auxiliary steam pressure stability;
S
32, whether judge to discharge carbonated drink in described trench normal; If so, then step S is entered
4; If not, then step S is returned
31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280846.6A CN102817644B (en) | 2012-08-08 | 2012-08-08 | Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280846.6A CN102817644B (en) | 2012-08-08 | 2012-08-08 | Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102817644A CN102817644A (en) | 2012-12-12 |
| CN102817644B true CN102817644B (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210280846.6A Active CN102817644B (en) | 2012-08-08 | 2012-08-08 | Flushing system and flushing method of steam side of high-pressure heater of steam turbine generator unit |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03251603A (en) * | 1990-02-28 | 1991-11-11 | Fuji Electric Co Ltd | Downcomer of deaerator |
| JPH07279619A (en) * | 1994-04-12 | 1995-10-27 | Toshiba Corp | Feedwater heater storage system |
| CN1695829A (en) * | 2005-05-27 | 2005-11-16 | 江苏省电力试验研究院有限公司 | Method for washing pipe by using steam from boiler |
| CN100557304C (en) * | 2007-10-11 | 2009-11-04 | 冯伟忠 | Dewatering capacity-enlarging starts the startup method of monotube boiler near steam heating boilers |
| CN101574695A (en) * | 2009-06-12 | 2009-11-11 | 贵州电力试验研究院 | Method and device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant |
-
2012
- 2012-08-08 CN CN201210280846.6A patent/CN102817644B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03251603A (en) * | 1990-02-28 | 1991-11-11 | Fuji Electric Co Ltd | Downcomer of deaerator |
| JPH07279619A (en) * | 1994-04-12 | 1995-10-27 | Toshiba Corp | Feedwater heater storage system |
| CN1695829A (en) * | 2005-05-27 | 2005-11-16 | 江苏省电力试验研究院有限公司 | Method for washing pipe by using steam from boiler |
| CN100557304C (en) * | 2007-10-11 | 2009-11-04 | 冯伟忠 | Dewatering capacity-enlarging starts the startup method of monotube boiler near steam heating boilers |
| CN101574695A (en) * | 2009-06-12 | 2009-11-11 | 贵州电力试验研究院 | Method and device for flushing vapor side of high-low pressure heater in large-sized heat-engine plant |
Non-Patent Citations (1)
| Title |
|---|
| 新建机组汽水系统冲洗的新方法;卢立东;《热力发电》;20041125(第11期);第76-77页 * |
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| CN102817644A (en) | 2012-12-12 |
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Address after: 200031 No. 68, Gaoyou Road, Shanghai, Xuhui District Patentee after: Shanghai electric power construction start adjustment test Institute Co., Ltd Address before: 200031 No. 68, Gaoyou Road, Shanghai, Xuhui District Patentee before: SHANGHAI ELECTRIC POWER CONSTRUCTION STARTING AND ADJUSTMENT TESTING LABORATORY |
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