CN87103105A - The steam turbine cylinder insulation method of adjustable cylinder heat dissipating capacity and system - Google Patents
The steam turbine cylinder insulation method of adjustable cylinder heat dissipating capacity and system Download PDFInfo
- Publication number
- CN87103105A CN87103105A CN87103105.1A CN87103105A CN87103105A CN 87103105 A CN87103105 A CN 87103105A CN 87103105 A CN87103105 A CN 87103105A CN 87103105 A CN87103105 A CN 87103105A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- cavity
- steam turbine
- heat dissipating
- cooling
- 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
Links
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The present invention is the steam turbine cylinder insulation method and the system of adjustable cylinder heat dissipating capacity.Be provided with cavity between steam turbine outer wall and thermal insulation layer, steam turbine is when normal operation, and cavity plays the heat-insulation and heat-preservation effect, and when the needs cooling cylinder, cavity plays the ventilation flue effect.The present invention also has steam turbine external-cooling type nature and forced convection cooling system, and its system includes the one's intention as revealed in what one says pipe, outlet airduct, cavity, pipe valve, controllable register, blower fan.Its effect is, when cylinder need cool off, and can safety, cooling quickly and easily.In steam turbine startup and the stopping process, when occurring the negative expansion difference between cylinder and the rotor, can reduce its value, save thermal insulating material.
Description
The present invention is the steam turbine cylinder insulation method and the system of adjustable cylinder heat dissipating capacity.
Existing steam turbine heat preserving method is: thermal insulating material is close on the casing outer wall layer by layer, and fastening then, add protective layer etc. again.On heat preservation method, require the internal layer thermal insulating material to be close to densely and have certain intensity, do not allow shelling, crack with casing outer wall.
The purpose of this insulation is: reduce the radiation loss of cylinder and thermal stress, the thermal distortion of minimizing cylinder as far as possible.But incident problem is: because the thermal insulatiion for tuebine casing layer is very thick and very tight; so when steam turbine stops will overhaul the time; the cylinder temperature short time can fall; delayed maintenance on-stream time; prolonged date of survey, the time that natural cooling needed after a 250MW unit full load was shut down is 90 hours.In halt turbines and the hot starting, hot start, it is poor negative expansion often to occur between cylinder and the rotor, and promptly rotor shrinks with respect to cylinder, and reduce in dynamic and static part gap, threatens the safe operation of unit, and it is poor that existing thermal insulatiion for tuebine casing method is unfavorable for reducing this negative expansion.
Purpose of the present invention overcomes this known shortcoming exactly, can not only reduce the heat dissipating capacity of cylinder and thermal stress, the thermal distortion of cylinder, and the negative expansion that also helps between minimizing cylinder and the rotor is poor; When needing cooling cylinder, can be fast, cooling cylinder easily and safely.
The present invention changes traditional thermal insulatiion for tuebine casing method, changes cavity type thermal insulatiion for tuebine casing method into by the original formula thermal insulatiion for tuebine casing method of being close to.Originally the thermal insulatiion for tuebine casing material is to be close to layer by layer on the casing outer wall, changes into now between casing outer wall and the thermal insulation layer and is provided with cavity.The interlayer or the upper and lower insulation support of useful thermal insulating material adhered layer in the cavity.Thermal insulating material and the position that cylinder, pipeline directly contact must be close to densely, and the slit must not be arranged, thereby form tight cavity.Cavity can be divided into upper plenum and following cavity.Inlet airduct and outlet airduct are arranged on the cavity, on inlet airduct or the outlet airduct pipe valve is housed, controllable register also is housed, the controllable register aperture can be regulated with manual, a distant place, automatic three kinds of methods.Cavity is except the airduct of entry and exit, and is isolated with the thermal insulation layer outer air.When steam turbine need be incubated, the pipe valve on inlet airduct or the outlet airduct was closing atmosphere draught-free in the cavity.At this moment, cavity plays the heat-insulation and heat-preservation effect.Generally speaking, controllable register is opened slightly, and purpose is: keep the cavity external and internal pressure to balance each other, when preventing that cylinder temperature from raising, because air is heated and pressure raises in the cavity, and cylinder temperature is when descending, and the cavity internal pressure descends.When needing cooling cylinder, open the pipe valve on inlet or the outlet airduct, at this moment, cool air enters cavity from the inlet airduct, and the outlet airduct of the air after being heated on cavity forms the natural convection of air to the thermal insulation layer outside, thereby cooling cylinder, at this moment cavity plays ventilation flue.In order to quicken cooling cylinder blower fan is housed also, regulates by controllable register by the air quantity of cavity.Inlet, outlet airduct cavity, controllable register, pipe valve, blower fan are formed cylinder external-cooling type nature and forced convection cooling system.
Characteristics of the present invention are: 1, can be safely, cooling cylinder quickly and easily.With the method ratio of the later on quick cooling cylinder of existing halt turbines, it is little to consume energy, and applicability is wide, safety, characteristics convenient, that easily implement, and " dynamic power machine digest " 85DJ1351 has reported Russian Patent " cooling off the closing method of boiler and steam turbine ".The closing method of being recommended is: cut off the fuel supply of boiler and the admission of steam turbine, will drain into vapour condenser from the steam that boiler heating surface comes, send air to boiler heating surface, live steam pipe and Turbine Flow Path then, air is extracted out by air ejector.Obviously, this method is not suitable for the steam turbine of non-unit system, shutdown at rating parameters to unit system steam turbine shutdown at sliding parameters.Adopt at present the similar above-mentioned method with the pressurized air cooling, it can carry out after steam cooling in the world morely.In the cooling procedure, need to change high pressure oil pump, air compressor and other supplementary equipment, so, the energy consumption height, maintenance is big.The present invention still is that shutdown at sliding parameters all is suitable for to shutdown at rating parameters.The present invention is not consumed energy when the natural convection with air comes cooling cylinder; When coming cooling cylinder,, fan pressure head do not need to change other supplementary equipment again because hanging down with forced convection, so, can loss-rate cool off much lower with pressurized air; The ventilation equipment investment cost is also low.In the prior art, no matter,, promptly pressurized air or steam are sent into cylinder internal because all belong to " interior cold " with pressurized air cooling or steam cooling, so, relate to other system, increased many relevant operation amounts, the invention belongs to " external cooling ", do not relate to other system, simple to operate.
2, the present invention favourable for the negative expansion that reduces between cylinder and the rotor poor.When steam turbine starting and stopping process in, when occurring the negative expansion difference between cylinder and the rotor, with the suitable cooling cylinder of cross-ventilated method, it is poor just can to reduce negative expansion, this method simply, reliably.
3, because come the instead of part thermal insulating material, so save thermal insulating material about 1/3 with cavity.
Accompanying drawing is one embodiment of the present of invention schematic representation.
It is made up of thermal insulation layer (1), interlayer (2), protective layer (3), fastening piece (4), cavity (5), inlet airduct (6), outlet airduct (7), pipe valve (8) controllable register (9) and blower fan (10).
Form the most handy board-like thermal insulating material of internal layer thermal insulating material of cavity, and for the heat loss through radiation loss that reduces cylinder with avoid being incubated for the purpose of ash flies upward the available heat preserving and insulating material of aluminizing.Also can be on casing outer wall on the structure of cavity fastening good thin-walled insulation material earlier, and then establish cavity, the flow process number of air more or less in the cavity.Cavity passage can also have other form.For example, between the upper and lower cavity with the upper and lower cylinder flange junction plane of steam turbine be the boundary separately, be not communicated with mutually, cool air is respectively by upper and lower cavity, and controls its air quantity respectively with two controllable registers.Like this, favourable for aligning upper and lower cylinder temperature.When the nominal parameter cold start, in cavity, send hot blast hot cylinder and flange in advance, for flow of steam direction in the steam turbine, air flow or adverse current or following current in the cavity.
Inlet airduct, outlet can be equipped with pipe valve on the airduct, so that steam turbine is normally in service, and the complete closed cavity, and keep suitable pressure in it.Blower fan can be replaced by air ejector.
Claims (4)
1, the steam turbine cylinder insulation method and the system that comprise the adjustable cylinder heat dissipating capacity of thermal insulation layer [1], protective layer [3], fastening piece [4]; it is characterized in that: be provided with cavity [5] between (1) casing outer wall and the thermal insulation layer, (2) are equipped with cylinder external-cooling type nature and forced convection cooling system.
2, according to the steam turbine cylinder insulation method and the system of the adjustable cylinder heat dissipating capacity of claim 1, it is characterized in that: cavity (5) is divided into upper plenum and following cavity, interlayer (2) is arranged in the cavity (5) or be incubated support.
3, according to the steam turbine cylinder insulation method and the system of the adjustable cylinder heat dissipating capacity of claim 2, it is characterized in that: cavity (5) is except that inlet airduct (6), outlet airduct (7), and is isolated with thermal insulation layer (1) outer air.
4, according to the steam turbine cylinder insulation method and the system of the adjustable cylinder heat dissipating capacity of claim 1, it is characterized in that: cylinder external-cooling type nature wherein and forced convection cooling system by inlet airduct (6), export airduct (7), cavity (5), pipe valve (8), controllable register (9) and blower fan (10) and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103105 CN1013289B (en) | 1987-04-24 | 1987-04-24 | The steam turbine cylinder insulation method of adjustable cylinder heat dissipating capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87103105 CN1013289B (en) | 1987-04-24 | 1987-04-24 | The steam turbine cylinder insulation method of adjustable cylinder heat dissipating capacity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87103105A true CN87103105A (en) | 1987-11-18 |
| CN1013289B CN1013289B (en) | 1991-07-24 |
Family
ID=4814293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87103105 Expired CN1013289B (en) | 1987-04-24 | 1987-04-24 | The steam turbine cylinder insulation method of adjustable cylinder heat dissipating capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1013289B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523716A (en) * | 2016-12-23 | 2017-03-22 | 上海电气电站设备有限公司 | Turbine integrated steam inlet valve |
| CN107795340A (en) * | 2016-09-07 | 2018-03-13 | 通用电气公司 | Turbine temperatures control system |
| CN114087038A (en) * | 2021-11-11 | 2022-02-25 | 重庆江增船舶重工有限公司 | Cooling structure and method for cylinder body during shutdown of supercritical carbon dioxide turbine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10823061B2 (en) * | 2016-07-15 | 2020-11-03 | General Electric Company | Engine air inlet having a double-panel heated wall |
-
1987
- 1987-04-24 CN CN 87103105 patent/CN1013289B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107795340A (en) * | 2016-09-07 | 2018-03-13 | 通用电气公司 | Turbine temperatures control system |
| CN107795340B (en) * | 2016-09-07 | 2022-03-08 | 通用电气公司 | Turbine temperature control system |
| CN106523716A (en) * | 2016-12-23 | 2017-03-22 | 上海电气电站设备有限公司 | Turbine integrated steam inlet valve |
| CN106523716B (en) * | 2016-12-23 | 2020-04-17 | 上海电气电站设备有限公司 | Integrated steam inlet valve of steam turbine |
| CN114087038A (en) * | 2021-11-11 | 2022-02-25 | 重庆江增船舶重工有限公司 | Cooling structure and method for cylinder body during shutdown of supercritical carbon dioxide turbine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1013289B (en) | 1991-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7500349B2 (en) | Power plant and operating method | |
| CN109322716B (en) | Gas-steam combined cycle high back pressure heat supply unit and rotor-changing non-stop combustion machine method | |
| CN108087048B (en) | Operation mode of cogeneration steam turbine generator unit | |
| CN111894683A (en) | Steam turbine unit air pre-warming quick start control system and method | |
| CN112344413A (en) | Low-pressure steam source boosting and heat supplying method for cogeneration unit | |
| CN87103105A (en) | The steam turbine cylinder insulation method of adjustable cylinder heat dissipating capacity and system | |
| CN107420204A (en) | The system and method for gas turbine inlet air temperature in a kind of control cogeneration of heat and power | |
| CN108468575B (en) | System for changing extraction condensing unit into back pressure unit based on injection heat pump and operation method thereof | |
| CN110118106A (en) | A kind of distributed top pressure power generation system and working method based on efficient radial turbines | |
| KR20160023811A (en) | Method for operating a combined cycle power plant | |
| CN214303962U (en) | Rapid air pre-warming starting system of steam turbine set | |
| CN217558638U (en) | Cooling strengthening device for bearing box of static blade adjustable axial flow type induced draft fan | |
| CN217538808U (en) | Heat recovery system for reducing cold source loss of power plant | |
| CN215804733U (en) | Gas turbine cooling system | |
| CN209689474U (en) | A kind of indirect type cooling column water temperature regulating device | |
| CN211314295U (en) | High-pressure cylinder air pre-warming and quick-cooling system | |
| CN2222314Y (en) | Indoor warming device | |
| CN2118160U (en) | Forced ventilating cooling system device for cylinder of steam turbine | |
| CN220551934U (en) | Cooling circulation system of warm air blower | |
| CN219300766U (en) | Technological structure for controlling gas diffusion and prosperity of European and Metallurgical furnace | |
| CN114198804B (en) | Steam extraction and heat supply system of steam turbine generator unit with secondary heating function | |
| JPS57124003A (en) | Geothermal turbine | |
| CN212057859U (en) | Closed cold water temperature automatic control system | |
| CN2270207Y (en) | Thermodynamic container cooling plant | |
| CN209399667U (en) | Energy conservation and environmental protection drying box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |