CN208650931U - A kind of steam extraction heat supply unit quick response load system - Google Patents
A kind of steam extraction heat supply unit quick response load system Download PDFInfo
- Publication number
- CN208650931U CN208650931U CN201821401026.7U CN201821401026U CN208650931U CN 208650931 U CN208650931 U CN 208650931U CN 201821401026 U CN201821401026 U CN 201821401026U CN 208650931 U CN208650931 U CN 208650931U
- Authority
- CN
- China
- Prior art keywords
- steam
- heat supply
- low pressure
- cylinder
- pressure cylinder
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a kind of steam extraction heat supply unit quick response load systems, including steam turbine high intermediate pressure cylinder (1), turbine low pressure cylinder (2), generator (3), heat exchangers for district heating (7) and condenser (8), the steam turbine high intermediate pressure cylinder (1) is connected to by mesolow communicating pipe (4) with turbine low pressure cylinder (2), is provided with mesolow communicating pipe butterfly valve (5) on the mesolow communicating pipe (4)；The steam discharge of the steam turbine high intermediate pressure cylinder (1) enters heat exchangers for district heating (7) by heat supply steam extraction adjustment valve (6), reject steam pipeline (9) are set before heat supply steam extraction adjustment valve (6), reject steam pipeline (9) the outlet mesolow communicating pipe (4), is provided on the reject steam pipeline (9) to bypass into vapour and adjusts valve (10)；For the turbine low pressure cylinder (2) by connecting to wheel with generator (3), turbine low pressure cylinder (2) steam discharge enters condenser (8).
Description
Technical field
The utility model relates to thermal power generation thermal power plant unit optimization running technology fields to be more specifically related to a kind of pumping
Vapour thermal power plant unit quick response load system.
Background technique
Steam extraction heat supply unit, which refers to draw from the steam extraction of steam turbine part, concentrates city for heating heat supply network recirculated water
A part of intermediate pressure cylinder steam discharge is led to heat exchangers for district heating by taking 300MW grades of steam-extracting type thermal power plant units as an example, due to intermediate pressure cylinder by heat supply
The extraction of steam discharge, the quantity of steam into low pressure (LP) cylinder acting power generation is reduced, during will cause heating, steam extraction heat supply unit power generation
Load is accordingly reduced, steam extraction heat supply unit varying duty response performance is poor, seriously affects power grid AGC, ACE modulability for steam power plant
Energy index, to cause that cost of verification and evaluation occurs for steam power plant's electric power ancillary service.During existing steam extraction heat supply unit heat supply steam extraction,
It is to be drawn intermediate pressure cylinder steam discharge by turning down mesolow communicating pipe butterfly valve, valve is adjusted by heat supply extraction line, heat supply steam extraction
Draw and be connected to heat exchangers for district heating, by taking 300MW steam turbine thermal power plant unit as an example, since mesolow Diameter of connecting pipe is larger
(DN1400mm), mesolow communicating pipe butterfly valve use hydraulic control, extraction for heat supply run during, mesolow communicating pipe butterfly valve it is general
In throttle, communicating pipe butterfly valve bore it is larger, Adjustment precision is poor, if adjustment frequently communicating pipe butterfly valve is be easy to cause to close entirely,
Intermediate pressure cylinder exhaust steam pressure transfinites or intermediate pressure cylinder exhaust temperature transfinites to occurring, and has a significant impact to Turbine Safety operation, because
In this live actual moving process, the butterfly valve generally use of steam extraction heat supply unit communicating pipe is manually controlled, and maintains centainly to open in operation
Degree, and its specific aperture is influenced by unit heat supply steam extraction amount size, operations staff adjusts valve by heat supply steam extraction to adjust heat supply
Extraction pressure, to guarantee heat exchangers for district heating supply water temperature.
Utility model content
In the presence of overcoming the shortcomings of the prior art, the utility model provides a kind of steam extraction heat supply unit quick response
Load system, when solving the operation of existing extraction for heat supply steam turbine supplying thermal condition, steam turbine pitch is poor to the response performance of load, ACE
The parameter fluctuations amplitude such as main steam pressure, fuel quantity, environmental protection index transfinites under mode, and steam turbine pitch amplitude of fluctuation is big etc. asks
Topic.
In order to solve the above-mentioned technical problem, the technology employed by the present utility model is
A kind of steam extraction heat supply unit quick response load system, it is characterised in that: including steam turbine high intermediate pressure cylinder, steam turbine
Low pressure (LP) cylinder, generator, heat exchangers for district heating and condenser, the steam turbine high intermediate pressure cylinder are low with steam turbine by mesolow communicating pipe
Cylinder pressure connection, is provided with mesolow communicating pipe butterfly valve on the mesolow communicating pipe；The steam discharge of the steam turbine high intermediate pressure cylinder is logical
It crosses heat supply steam extraction adjustment valve and enters heat exchangers for district heating, reject steam pipeline, the bypass are set before the heat supply steam extraction adjustment valve
It jet chimney outlet mesolow communicating pipe, is provided on the reject steam pipeline to bypass into vapour and adjusts valve；The steamer
For machine low pressure (LP) cylinder by connecting to wheel with generator, turbine low pressure cylinder steam discharge enters condenser.
The mesolow communicating pipe is in parallel with reject steam pipeline to enter turbine low pressure cylinder.
Described to bypass into vapour adjustment valve using control mode of surging, hydraulic oil is provided by Turbine Fire resistant Oil system.
The low communicating pipe butterfly valve of medium pressure is used to control intermediate pressure cylinder exhaust steam pressure and low pressure (LP) cylinder initial steam pressure is being safely operated
Within the scope of.
Described bypass into vapour adjusts valve by aperture variation, changes the steam flow for entering low pressure (LP) cylinder, to change low pressure
The acting of cylinder is contributed, and then changes generator actual load.
Described bypass into vapour adjustment valve opening controls AGC load instruction and actual generator load by automatic generation amount
Deviation control.
Through-current capacity, that is, reject steam pipeline of valve is adjusted by setting reject steam, control bypass adjustment valve opening variation is made
At the variation of low pressure (LP) cylinder throttle flow, reach the clipping influenced on load variations.
Compared with prior art, it is had the beneficial effect that possessed by the utility model
The utility model provides a kind of steam extraction heat supply unit quick response load system, follows coordinated control in original furnace
On the basis of mode, steam extraction amount variation adjustment generation load function is increased, the variation of AGC load instruction had not only been able to satisfy and has required, but also not
Heating is influenced, the load responding of steam extraction heat supply unit is improved, significantly promotes the load responding of steam extraction heat supply unit
Rate improves the flexibility of steam extraction heat supply unit, highly beneficial to electric power assisted hatchingization.
Detailed description of the invention
Fig. 1 is a kind of steam extraction heat supply unit quick response load system schematic diagram that utility model provides；
Fig. 2 is steam extraction heat supply unit quick response load control system flow chart.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
As shown in Figure 1, a kind of steam extraction heat supply unit quick response load system, it is characterised in that: including steam turbine senior middle school
Cylinder pressure 1, turbine low pressure cylinder 2, generator 3, heat exchangers for district heating 7 and condenser 8, the steam turbine high intermediate pressure cylinder 1 pass through in it is low
Pressure is connected to communicating pipe 4 with turbine low pressure cylinder 2, is provided with mesolow communicating pipe butterfly valve 5 on the mesolow communicating pipe 4；It is described
The steam discharge of steam turbine high intermediate pressure cylinder 1 adjusts valve 6 by heat supply steam extraction and enters heat exchangers for district heating 7, before the heat supply steam extraction adjusts valve 6
Reject steam pipeline 9, the outlet of reject steam pipeline 9 connection mesolow communicating pipe 4 are set, and are connected to turbine low pressure cylinder 2
At air intake, it is provided with and is bypassed into vapour adjustment valve 10 on the reject steam pipeline 9；The turbine low pressure cylinder 2 is by wheel
It is connect with generator 3, the steam discharge of low pressure (LP) cylinder 2 enters condenser 8.The mesolow communicating pipe 4 is in parallel with reject steam pipeline 10.
The low communicating pipe butterfly valve 5 of medium pressure for control intermediate pressure cylinder exhaust steam pressure and low pressure (LP) cylinder initial steam pressure operational envelope it
It is interior.Described to bypass into vapour adjustment valve 10 using control mode of surging, hydraulic oil is provided by Turbine Fire resistant Oil system.The bypass
Valve 10 is adjusted into vapour to change by aperture, changes the steam flow for entering low pressure (LP) cylinder, thus change the acting power output of low pressure (LP) cylinder, into
And change generator actual load.It is described bypass into vapour adjustment 10 aperture of valve by automatic generation amount control AGC load instruction with
The deviation of actual generator load controls.Through-current capacity, that is, reject steam pipeline 9 of valve 10, control are adjusted by setting reject steam
Bypass adjustment 10 aperture of valve variation causes the variation of low pressure (LP) cylinder throttle flow, reaches the clipping influenced on load variations.
As shown in Fig. 2, on the basis of original boiler-turbine coordinated control mode, increasing heat supply steam extraction amount, (i.e. low pressure (LP) cylinder is into vapour
Amount) variation Load adjustment function；After the variation of AGC load instruction, actual load and AGC load instruction form load deviation, load
Deviation action adjusts valve control in reject steam, and controller issues reject steam adjustment valve opening variation instruction, reject steam
Adjustment valve opening changes；Reject steam adjusts valve opening variation, the steam flow variation of low pressure (LP) cylinder is caused entry into, to change
Be lower cylinder pressure acting power output, and then change generator actual load；
By taking 300MW grades of extraction for heat supply air cooling units as an example, intermediate pressure cylinder steam discharge is heat supply steam extraction, and steam extraction parameter is 0.4MPa
(a), 245 DEG C, design heat supply steam extraction amount is generally 500t/h under specified main steam amount, at this time low pressure (LP) cylinder throttle flow about 150t/h,
Back pressure is 10kPa；It is calculated according to low pressure (LP) cylinder steam admission enthalpy hjq, low pressure (LP) cylinder exhaust enthalpy hpq, low pressure (LP) cylinder throttle flow changes 100t/
H about influences generator output variation 14MW, about 4.67%Pe(Pe and refers to the nominal output of unit)；
Design 500t/h is not achieved in conjunction with the practical heating load most of the time of the practical 300MW steam extraction heat supply unit in scene,
That is, low pressure (LP) cylinder throttle flow guarantees in heat supply extraction pressure when supplying thermal condition operates normally generally in 200-300t/h
Low pressure communicating pipe butterfly valve is in flow restriction control state, mesolow communicating pipe butterfly valve choke pressure drop about 0.3-0.4MPa, power plant
Operations staff considers that unit safety in operation generally manually controls, since mesolow communicating pipe regulating valve manually controls, low pressure
The variation of cylinder throttle flow is relatively slow, and the load responding for further resulting in heat supply steam turbine group is poor；
To guarantee Turbine Safety operation, mesolow connection butterfly valve is reliable for operation, reject steam pipeline is arranged, according to low pressure
Cylinder throttle flow variation 100t/h about influences generator output variation 14MW, about 4.67%Pe；
300MW grades of thermal power plant units, reject steam pipeline through-current capacity are set as 120t/h, i.e., bypass adjustment valve standard-sized sheet when can be with
By 120t/h steam, reject steam caliber is DN800mm, and 120t/h steam will affect low pressure (LP) cylinder acting about 16.8MW.
There are certain functional relation f (x) with through-current capacity for bypass adjustment valve opening, when AGC load instruction and actual load
When forming load deviation, if load deviation is 20MW, load deviation directly acts on control by certain proportion coefficient (using 40%)
Device processed, i.e. 8MW act on bypass adjustment valve, bypass adjustment valve opening corresponding change；
The functional relation of bypass adjustment valve opening and through-current capacity: f (x)
| Flow percentage (f (x)) | 8% | 13% | 22% | 30% | 43% | 65% | 83% | 93% | 100% |
| Aperture (x) | 10° | 20° | 30° | 40° | 50° | 60° | 70° | 80° | 90° |
When load variations 8MW, low pressure (LP) cylinder throttle flow need to change 57t/h, pass through functional relation f (x), changes in flow rate
47.5%, bypass butterfly valve opening need to be changed to 63 ° by 20 ° of increases.
Bypass adjustment valve is that there is mechanical minimum aperture be 10 ° to butterfly valve, and standard-sized sheet aperture is 90 °, in response to the fast of load
Speed, adjustment valve, which is between 20 ° to 80 °, to be adjusted, therefore when adjustment response valve load deviation, sets clipping up and down, i.e., other
It is 80 ° that road adjustment valve minimum aperture, which is 20 ° of maximum openings, and flow percentage variation is 73%, i.e., alterable low pressure (LP) cylinder throttle flow is about
88t/h influences generator load about 12MW, reaches varying duty about 4%.
The response effect of bypass adjustment valve adjustment low pressure (LP) cylinder throttle flow response load occurs mainly in the variation of AGC load instruction
Initial stage, by changing low pressure (LP) cylinder throttle flow quickly come quick response unit load, and steam turbine pitch and boiler oil amount pair
The response of load is integrally to compare lag as the main response for adjusting load depth, especially boiler oil, and there have to be certain slow
Prolong, but the response of fuel quantity can guarantee the precision of steam extraction heat supply unit response load.
Only the preferred embodiment of the utility model is explained in detail above, but the utility model be not limited to it is above-mentioned
Embodiment can also not depart from the utility model aims within the knowledge of a person skilled in the art
Under the premise of various changes can be made, various change should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of steam extraction heat supply unit quick response load system, it is characterised in that: including steam turbine high intermediate pressure cylinder (1), steamer
Machine low pressure (LP) cylinder (2), generator (3), heat exchangers for district heating (7) and condenser (8), the steam turbine high intermediate pressure cylinder (1) pass through in it is low
Pressure communicating pipe (4) is connected to turbine low pressure cylinder (2), is provided with mesolow communicating pipe butterfly valve on the mesolow communicating pipe (4)
(5)；The steam discharge of the steam turbine high intermediate pressure cylinder (1) enters heat exchangers for district heating (7) by heat supply steam extraction adjustment valve (6), the confession
Reject steam pipeline (9) are set before hot steam extraction adjustment valve (6), reject steam pipeline (9) the outlet mesolow communicating pipe
(4), it is provided with to bypass into vapour on the reject steam pipeline (9) and adjusts valve (10)；The turbine low pressure cylinder (2) is by wheel
It is connect with generator (3), turbine low pressure cylinder (2) steam discharge enters condenser (8).
2. a kind of steam extraction heat supply unit quick response load system according to claim 1, it is characterised in that: low in described
Press communicating pipe (4) are in parallel with reject steam pipeline (9) to enter turbine low pressure cylinder (2).
3. a kind of steam extraction heat supply unit quick response load system according to claim 1, it is characterised in that: the bypass
Into vapour adjustment valve (10) using control mode of surging, hydraulic oil is provided by Turbine Fire resistant Oil system.
4. a kind of steam extraction heat supply unit quick response load system according to claim 1, it is characterised in that: low in described
Pressure communicating pipe butterfly valve (5) is for controlling intermediate pressure cylinder exhaust steam pressure and low pressure (LP) cylinder initial steam pressure within operational envelope.
5. a kind of steam extraction heat supply unit quick response load system according to claim 1, it is characterised in that: the bypass
Changed into vapour adjustment valve (10) by aperture, changes the steam flow for entering low pressure (LP) cylinder, thus change the acting power output of low pressure (LP) cylinder,
And then change generator actual load.
6. a kind of steam extraction heat supply unit quick response load system according to claim 5, it is characterised in that: the bypass
It is controlled into vapour adjustment valve (10) aperture by the deviation that automatic generation amount controls AGC load instruction and actual generator load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821401026.7U CN208650931U (en) | 2018-08-29 | 2018-08-29 | A kind of steam extraction heat supply unit quick response load system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821401026.7U CN208650931U (en) | 2018-08-29 | 2018-08-29 | A kind of steam extraction heat supply unit quick response load system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208650931U true CN208650931U (en) | 2019-03-26 |
Family
ID=65791848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821401026.7U Expired - Fee Related CN208650931U (en) | 2018-08-29 | 2018-08-29 | A kind of steam extraction heat supply unit quick response load system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208650931U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825316A (en) * | 2018-08-29 | 2018-11-16 | 山西格盟安全生产咨询有限公司 | A kind of steam extraction heat supply unit quick response load system |
| CN109915216A (en) * | 2019-04-09 | 2019-06-21 | 福州怡辉电力设备有限公司 | A kind of thermal power plant unit control steam extraction frequency modulation system and adjusting method in short-term |
| CN110939492A (en) * | 2019-12-04 | 2020-03-31 | 山西河坡发电有限责任公司 | Double-path steam inlet structure of low-medium pressure cylinder of steam turbine and control method |
| CN111255529A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Quick response automatic power generation control system and method for operation of heat supply cylinder switching unit |
| CN111255530A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Thermal power generating unit load adjusting system and method assisted by butterfly valve with low-pressure cylinder |
| CN114076004A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system and medium-pressure heat supply method |
| CN114076005A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system, control device and medium-pressure heat supply method |
| CN117145589A (en) * | 2023-10-31 | 2023-12-01 | 华能济南黄台发电有限公司 | Zero-output bypass cooling steam adjusting device of low-pressure cylinder of steam turbine |
-
2018
- 2018-08-29 CN CN201821401026.7U patent/CN208650931U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108825316A (en) * | 2018-08-29 | 2018-11-16 | 山西格盟安全生产咨询有限公司 | A kind of steam extraction heat supply unit quick response load system |
| CN109915216A (en) * | 2019-04-09 | 2019-06-21 | 福州怡辉电力设备有限公司 | A kind of thermal power plant unit control steam extraction frequency modulation system and adjusting method in short-term |
| CN110939492A (en) * | 2019-12-04 | 2020-03-31 | 山西河坡发电有限责任公司 | Double-path steam inlet structure of low-medium pressure cylinder of steam turbine and control method |
| CN111255529B (en) * | 2020-03-19 | 2024-02-02 | 西安热工研究院有限公司 | Rapid response automatic power generation control system and method during operation of heat supply cylinder cutting unit |
| CN111255529A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Quick response automatic power generation control system and method for operation of heat supply cylinder switching unit |
| CN111255530A (en) * | 2020-03-19 | 2020-06-09 | 西安热工研究院有限公司 | Thermal power generating unit load adjusting system and method assisted by butterfly valve with low-pressure cylinder |
| CN111255530B (en) * | 2020-03-19 | 2024-02-02 | 西安热工研究院有限公司 | Thermal power unit load adjusting system and method with low-pressure cylinder butterfly valve assistance |
| CN114076005A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system, control device and medium-pressure heat supply method |
| CN114076005B (en) * | 2021-11-02 | 2023-08-25 | 国能寿光发电有限责任公司 | Medium-pressure heat supply system, control device and medium-pressure heat supply method |
| CN114076004B (en) * | 2021-11-02 | 2023-08-25 | 国能寿光发电有限责任公司 | Medium-pressure heat supply system and medium-pressure heat supply method |
| CN114076004A (en) * | 2021-11-02 | 2022-02-22 | 神华国华寿光发电有限责任公司 | Medium-pressure heat supply system and medium-pressure heat supply method |
| CN117145589A (en) * | 2023-10-31 | 2023-12-01 | 华能济南黄台发电有限公司 | Zero-output bypass cooling steam adjusting device of low-pressure cylinder of steam turbine |
| CN117145589B (en) * | 2023-10-31 | 2024-01-19 | 华能济南黄台发电有限公司 | Zero-output bypass cooling steam adjusting device of low-pressure cylinder of steam turbine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208650931U (en) | A kind of steam extraction heat supply unit quick response load system | |
| WO2020181680A1 (en) | Solar-assisted coal-fired power generation system participating in primary frequency modulation, and control method therefor | |
| WO2020181678A1 (en) | Primary frequency regulation optimization control method corrected based on stored exergy of thermal systems of coal-fired unit | |
| CN109854313A (en) | A kind of flexible coal generating system and operation method | |
| CN108825316A (en) | A kind of steam extraction heat supply unit quick response load system | |
| CN103452600B (en) | Steam turbine generating system with indirect regulation on regenerative side and primary frequency regulating method | |
| WO2021238321A1 (en) | Efficient and flexible clean coal-fired power generation system having adaptive configuration, and operating method | |
| CN206846764U (en) | A kind of coal-fired hot-water boiler fume afterheat depth recovery system | |
| CN106996571A (en) | A kind of coal-fired hot-water boiler fume afterheat depth recovery system and its method | |
| CN209147060U (en) | A kind of power supply unit depth peak regulation system | |
| CN103542399B (en) | Boiler feed water system and feed water adjusting method thereof | |
| CN110553245A (en) | System for improving wide-load operation thermal efficiency of coal-fired unit | |
| CN109780529B (en) | Biomass cogeneration operation method based on water mixing and heat supply of tail-end electric heating pump | |
| CN110986022A (en) | Steam extraction heating heat supply drainage system | |
| CN216950586U (en) | Natural gas preheating system by using residual heat of residual boiler | |
| CN206131023U (en) | Stable control gas boiler coal air preheater low temperature corrosion's device | |
| CN206545526U (en) | A kind of steam turbine variable pressure operation control set for adjusting | |
| CN108952859A (en) | A kind of system and method for promoting electricity power output regulating power based on steam flow | |
| CN105201573A (en) | Back pressure turbine heat supply and energy storage system and heat supply and energy storage method thereof | |
| CN206145660U (en) | Hydrophobic water level regulating system of heating network heater | |
| CN211739243U (en) | Adjustable device for recycling waste heat of circulating cooling water of auxiliary engine of thermal power generating unit | |
| CN211695140U (en) | Energy-saving gas-fired hot water boiler directly supplies heating system | |
| CN107816732A (en) | A kind of air preheater cold end wall temperature adjusting means and method | |
| CN207849346U (en) | Utilize the Steam Turbine Regenerative System of medium temperature flue gas condensed water | |
| CN106988804B (en) | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190326 Termination date: 20210829 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |