CN109441558A - A kind of device improving Vacuum System Tightness of Steam Turbines - Google Patents
A kind of device improving Vacuum System Tightness of Steam Turbines Download PDFInfo
- Publication number
- CN109441558A CN109441558A CN201811021431.0A CN201811021431A CN109441558A CN 109441558 A CN109441558 A CN 109441558A CN 201811021431 A CN201811021431 A CN 201811021431A CN 109441558 A CN109441558 A CN 109441558A
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- China
- Prior art keywords
- water
- cabinet
- pipe
- return
- vacuum system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 238000005192 partition Methods 0.000 claims abstract description 9
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
Abstract
The present invention provides a kind of device for improving Vacuum System Tightness of Steam Turbines, including heat pump sealing water return pipe, return water main pipe, axis adds vapour side return pipe, water seal arrangement, outlet pipe, shut-off valve and condenser, the water seal arrangement includes cabinet, liquid level float, case lid, the cabinet two sides are respectively equipped with inlet and outlet, the cabinet is arranged to two parts by partition, a part is intake chamber, another part is effluent trough, partition is equipped with overflow port, liquid level float is arranged in the effluent trough of cabinet, the heat pump sealing water return pipe is connected to return water main pipe, the return water main pipe and axis add vapour side return pipe to enter in intake chamber from the water inlet of cabinet, described outlet pipe one end enters in effluent trough from the water outlet of cabinet, the other end is connected with condenser, the shut-off valve is arranged on outlet pipe.The present invention can effectively improve steam turbine vacuum tightness, improve unit reliability, improve unit economy, reduce operation and service personnel's maintenance workload.
Description
Technical field
The invention belongs to turbine vacuum system technical fields, and in particular to a kind of raising Vacuum System Tightness of Steam Turbines
Device.
Background technique
The vacuum tightness of Steam Turbine can be poor, is one of the important parameter of a long-standing problem Power Plant economy,
Unit tightness difference will cause condenser vacuum low, and vacuum is low to make steam that setting value be not achieved in final stage expansion work, make
Unit output is restricted, and economy necessarily reduces, and unit axial displacement will increase, and influences unit safety operation.Unit tightness
Difference will cause oxygen content of condensate exceeded, can cause to corrode to condensate line and equipment, therefore, obtain best true
Sky reduces station service power consumption rate, reduces net coal consumption rate, improves unit safety operation, increases economic efficiency.Just because of this, it is transported in unit
All using vacuum system strictness as important one of performance assessment criteria in row.However, 300 MW and above Large-scale machine set vacuum system
It unites huge and complicated, the influence factor of vacuum system strictness is more, improves the type machine unit vacuum system strictness always
It is the problem of most of power plant.
No. 2 units of Datang Xi'an steam power plant are that the 300MW of Harbin Turbine production is subcritical, a resuperheat is solidifying
Vapour formula steam turbine.On March 14th, 2017, the unit are carried out when vacuum tightness test in operation in discovery vacuum values 3 minutes
Decline 3Kpa, the serious minimum standard 0.399Kpa/min for exceeding national regulation.Service personnel repeatedly online carry out vacuum leakage detection,
The methods of butter closure, installation closure plate are without positive effect.
The unit has carried out filling condenser water leakage detection when maintenance down in May, 2017, and a Steam Side of Condenser high position is poured water
To low pressure (LP) cylinder calixconcavity nest, multiple checks operate flange, faying face, weld seam of the following vacuum system of layer etc. and are easy to happen leakage
The position of air.To the leakage position of discovery by replacement gasket, tighten flange bolt, tamp the means such as sealant and carry out
Processing, however after starting on unit June 26, vacuum leak amount still has expansion trend, in leak test in 1 minute under vacuum
3Kpa is dropped, need to be joined and be opened appendage vacuum pump and unit can be maintained to operate normally.In July, 2017 is to use helium mass spectrometer leak detector to No. 2
Turbine vacuum system has carried out vacuum leakage detection, and it is hydrophobic to condenser multi-level water to find that heat pump sealing water return water and axis add in test
Envelope walks sky, and thus air is located to enter causes condenser vacuum to be deteriorated.
Currently, it is to be connected to condenser that the heat pump sealing water return water and axis of each thermal power plant's vacuum system, which add hydrophobic, connecing
It is installed with U-shaped water seal, the six grades of water seals of hydrophobic installing of heat pump sealing water before entering condenser, axis add-back water installs Pyatyi water seal, is
System is shown in Fig. 1.Due to U-shaped water seal generally closed structure, water level is not easy to monitor in operation, needs periodically to be filled the water,
Once water seal, which occurs, walks sky, unit vacuum just will affect.
Summary of the invention
In order to solve the above-mentioned technical problem the present invention provides a kind of device for improving Vacuum System Tightness of Steam Turbines, can
It is effective to improve steam turbine vacuum tightness, unit reliability, economy are improved, operation and service personnel's maintenance work are reduced
Amount.
The technical scheme is that a kind of device for improving Vacuum System Tightness of Steam Turbines, including multiple heat pumps are close
Water shutoff return pipe, return water main pipe, axis add vapour side return pipe, water seal arrangement, outlet pipe, shut-off valve and condenser, the water seal dress
It sets including cabinet, liquid level float, case lid, the cabinet two sides are respectively equipped with inlet and outlet, and the cabinet passes through partition
It is arranged to two parts, a part is intake chamber, and another part is effluent trough, and partition is equipped with overflow port, and cabinet is arranged in liquid level float
Effluent trough in, the heat pump sealing water return pipe is connected to return water main pipe, and the return water main pipe and axis add vapour side return pipe
It is entered in intake chamber from the water inlet of cabinet, described outlet pipe one end enters in effluent trough from the water outlet of cabinet, the other end
It is connected with condenser, the shut-off valve is arranged on outlet pipe, for controlling water return amount.
Further, the case lid is equipped with plug-type observation window to scheme, convenient for checking.
Further, the return water main pipe and axis add position of the vapour side return pipe in intake chamber high lower than overflow port to scheme
Degree, water inlet position are higher than overflow port position.
Further, the liquid level float bottom is set there are two guide sleeve scheme, is uniformly provided on the guide sleeve multiple
Through-hole.
Further, the effluent trough top is equipped with limit plate to scheme, and height is higher than liquid level float, prevents water level excessively high
Liquid level float is ejected into cabinet.
Further, height of the outlet pipe in effluent trough is higher than guide sleeve bottom position to scheme.
The invention has the advantages that the heat pump sealing water return water and axis in present invention removal original system add hydrophobic U-shaped water seal,
The sealing water return water of more heat pumps is converged into return water main pipe, then adds vapour side return pipe and water seal to fill return water main pipe and axis
Connection is set, controls water level inside device by liquid level float, device water outlet draws outlet pipe all the way and is connected to condenser, out
Shut-off valve is installed on water pipe and controls water return amount, and the aperture of shut-off valve is adjusted to suitably coming so that water level does not overflow in water tank when using
Sky is flowed and do not walked, guarantees that air does not leak into condenser, can effectively improve steam turbine vacuum tightness, it is reliable to improve unit
Property, unit economy is improved, operation and service personnel's maintenance workload are reduced.
Detailed description of the invention
Fig. 1 is existing Steam Turbine vacuum system schematic diagram；
Wherein: 1 ', heat pump sealing water return pipe, 2 ', axis add vapour side return pipe, 3 ', U-shaped water seal, 4 ', condenser；
Fig. 2 is 1 Steam Turbine vacuum system schematic diagram of the embodiment of the present invention；
Fig. 3 is the water seal arrangement structural schematic diagram of 2 Steam Turbine vacuum system of the embodiment of the present invention；
Wherein: 1, heat pump sealing water return pipe, 2, return water main pipe, 3, axis add vapour side return pipe, 4, water seal arrangement, 41, cabinet,
42, water inlet, 43, intake chamber, 44, partition, 45, overflow port, 46, effluent trough, 47, limit plate, 48, liquid level float, 49, guiding
Set, 410, water outlet, 5, outlet pipe, 6, shut-off valve, 7, condenser.
Specific embodiment
Clear and complete description is done to the present invention with reference to the accompanying drawing, so that those skilled in the art is not needing to make
Under conditions of creative work, it can sufficiently implement the present invention.
A specific embodiment of the invention is: as Figure 2-3, a kind of dress improving Vacuum System Tightness of Steam Turbines
It sets, including multiple heat pump sealing water return pipes 1, return water main pipe 2, axis add vapour side return pipe 3, water seal arrangement 4, outlet pipe 5, cut-off
Valve 6 and condenser 7, the water seal arrangement 4 include cabinet 41, liquid level float 48, case lid, 41 two sides of cabinet be respectively equipped with into
The mouth of a river 42 and water outlet 410, the cabinet 41 are arranged to two parts by partition 44, and a part is intake chamber 43, another part
For effluent trough 46, partition 44 is equipped with overflow port, and liquid level float 48 is arranged in the effluent trough 46 of cabinet 41, and the heat pump sealing water is returned
Water pipe 1 is connected to return water main pipe 2, and the return water main pipe 2 and axis add vapour side return pipe 3 to enter to from the water inlet 42 of cabinet 41
In intake chamber 43, described 5 one end of outlet pipe enters in effluent trough 46 from the water outlet 410 of cabinet 41, and the other end and condenser 7 connect
It connects, the shut-off valve 6 is arranged on outlet pipe 5, for controlling water return amount.
Further, the heat pump sealing water return pipe 1 is two.
Further, the case lid is equipped with plug-type observation window, convenient for checking.
Further, the return water main pipe 2 and axis add position of the vapour side return pipe 3 in intake chamber 43 lower than overflow port 45
Highly, 42 position of water inlet is higher than 45 position of overflow port.
Further, 48 bottom of liquid level float is set there are two guide sleeve 49, is uniformly provided on the guide sleeve 49 more
A through-hole.
Further, 46 top of effluent trough is equipped with limit plate 47, and height is higher than liquid level float 48, prevents water level mistake
Liquid level float 48 is ejected cabinet 41 by height.
Further, height of the outlet pipe 5 in effluent trough 46 is higher than 49 bottom position of guide sleeve.
As in a preferred embodiment, 41 height of cabinet is height 1000mm, the stainless steel plate of the 4mm of liquid level float 48
Production, diameter 800mm, height 400mm, maximum submergence 200mm use stainless-steel seamless pipe below liquid level float 48
Guide sleeve 49 is made, guide sleeve 49 diameter 245mm, height 290mm, guide sleeve 49 is circumferential to be evenly distributed with through-hole, uses stainless steel jointless
Steel pipe makes the outlet pipe 5 of 41 bottom of cabinet, and 5 height 300mm of outlet pipe uses the limit plate of channel steel production liquid level float 48
47, it prevents water level excessively high and liquid level float 48 is ejected into cabinet 41, limit plate 47 is away from 41 bottom 880mm of cabinet.
Presently preferred embodiments of the present invention is described above, it should be pointed out that the invention is not limited to above-mentioned
Particular implementation, devices and structures not described in detail herein should be understood as gives reality with the common mode in this field
It applies；Anyone skilled in the art, without departing from the scope of the technical proposal of the invention, technology according to the present invention
Essence any simple modifications, equivalents, and modifications made to the above embodiment still fall within technical solution of the present invention protection
In the range of.
Claims (6)
1. it is a kind of improve Vacuum System Tightness of Steam Turbines device, which is characterized in that including multiple heat pump sealing water return pipes,
Return water main pipe, axis add vapour side return pipe, water seal arrangement, outlet pipe, shut-off valve and condenser, the water seal arrangement include cabinet,
Liquid level float, case lid, the cabinet two sides are respectively equipped with inlet and outlet, and the cabinet is arranged to two by partition
Point, a part is intake chamber, and another part is effluent trough, and partition is equipped with overflow port, and liquid level float is arranged in the effluent trough of cabinet,
The heat pump sealing water return pipe is connected to return water main pipe, and the return water main pipe and axis add water inlet of the vapour side return pipe from cabinet
Mouth enters in intake chamber, and described outlet pipe one end enters in effluent trough from the water outlet of cabinet, and the other end is connected with condenser,
The shut-off valve is arranged on outlet pipe, for controlling water return amount.
2. a kind of according to claim 1, device improving Vacuum System Tightness of Steam Turbines, which is characterized in that described
Case lid is equipped with plug-type observation window, convenient for checking.
3. a kind of according to claim 1, device improving Vacuum System Tightness of Steam Turbines, which is characterized in that described
Return water main pipe and axis add position of the vapour side return pipe in intake chamber lower than overflow open height, and water inlet position is higher than overflow port position
It sets.
4. a kind of according to claim 1, device improving Vacuum System Tightness of Steam Turbines, which is characterized in that described
Liquid level float bottom is set there are two guide sleeve, is uniformly provided with multiple through-holes on the guide sleeve.
5. a kind of according to claim 1, device improving Vacuum System Tightness of Steam Turbines, which is characterized in that described
Effluent trough top is equipped with limit plate, and height is higher than liquid level float, prevents water level excessively high and liquid level float is ejected cabinet.
6. a kind of according to claim 4, device improving Vacuum System Tightness of Steam Turbines, which is characterized in that described
Height of the outlet pipe in effluent trough is higher than guide sleeve bottom position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811021431.0A CN109441558A (en) | 2018-09-03 | 2018-09-03 | A kind of device improving Vacuum System Tightness of Steam Turbines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811021431.0A CN109441558A (en) | 2018-09-03 | 2018-09-03 | A kind of device improving Vacuum System Tightness of Steam Turbines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109441558A true CN109441558A (en) | 2019-03-08 |
Family
ID=65530978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811021431.0A Pending CN109441558A (en) | 2018-09-03 | 2018-09-03 | A kind of device improving Vacuum System Tightness of Steam Turbines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109441558A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153545A (en) * | 2006-09-29 | 2008-04-02 | 通用电气公司 | Stationary-rotating assemblies having surface features for enhanced containment of fluid flow, and related processes |
| CN203880386U (en) * | 2014-06-19 | 2014-10-15 | 大唐苏州热电有限责任公司 | Automatic drain tank with middle baffle plate |
| CN104603553A (en) * | 2012-08-29 | 2015-05-06 | 查尔斯·M·格里姆 | Floating solar collector assisted OTEC generator |
| CN206487875U (en) * | 2016-12-27 | 2017-09-12 | 大唐陕西发电有限公司灞桥热电厂 | A kind of generator Seal Oil device |
-
2018
- 2018-09-03 CN CN201811021431.0A patent/CN109441558A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101153545A (en) * | 2006-09-29 | 2008-04-02 | 通用电气公司 | Stationary-rotating assemblies having surface features for enhanced containment of fluid flow, and related processes |
| CN104603553A (en) * | 2012-08-29 | 2015-05-06 | 查尔斯·M·格里姆 | Floating solar collector assisted OTEC generator |
| CN203880386U (en) * | 2014-06-19 | 2014-10-15 | 大唐苏州热电有限责任公司 | Automatic drain tank with middle baffle plate |
| CN206487875U (en) * | 2016-12-27 | 2017-09-12 | 大唐陕西发电有限公司灞桥热电厂 | A kind of generator Seal Oil device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190308 |
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| RJ01 | Rejection of invention patent application after publication |