CN206845247U - One kind enhancing power plant flexibility therrmodynamic system - Google Patents
One kind enhancing power plant flexibility therrmodynamic system Download PDFInfo
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- CN206845247U CN206845247U CN201720748718.8U CN201720748718U CN206845247U CN 206845247 U CN206845247 U CN 206845247U CN 201720748718 U CN201720748718 U CN 201720748718U CN 206845247 U CN206845247 U CN 206845247U
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Abstract
A kind of enhancing power plant flexibility therrmodynamic system of the utility model, boiler superheater connection high pressure cylinder, boiler reheater connection intermediate pressure cylinder, intermediate pressure cylinder connects low pressure (LP) cylinder, low pressure (LP) cylinder connection generator, it is characterised in that, high pressure cylinder entrance is provided with high pressure main stop valve, and intermediate pressure cylinder entrance presses stop valve in setting；High pressure turbine by, high pressure turbine by connection reheater are provided between superheater and high pressure cylinder；High pressure cylinder connects leading point by height row's check-valves, and leading point connects high pressure turbine by and reheater by motor-operated isolation valve；Leading point connects temperature-decreased pressure reducer, and temperature-decreased pressure reducer, which is connected to, outer supplies steam；Connect low voltage bypass between reheater and intermediate pressure cylinder, low voltage bypass is connected to condenser and outer supplies steam.The utility model is used for the flexibility for strengthening power plant, meets power peak regulation needs.
Description
Technical field
Power plant field is the utility model is related to, particularly a kind of enhancing power plant flexibility therrmodynamic system.
Background technology
The country is especially in three northern areas of China at present, and supply of electric power ability is beyond use demand, energy waste caused by electric energy
Seriously, China's wind-powered electricity generation, photovoltaic installed capacity be into global maximum, but abandons wind, abandons optical issue and exist all the time.Asked to solve this
Topic, the flexibility transformation of national requirements coal unit implementation at present, increases peak modulation capacity.
But three northern areas of China major part coal unit is all thermal power plant unit, and the regulation of thermal power plant unit is with heat in traditional sense
Fixed electricity.Could meet the needs of external heat supply in the case where ensureing certain generation load.Using an overcritical thermal power plant unit of 350MW as
Example, when to meet it is specified draw gas 550t/h when, now generated output reaches about 80% i.e. 280MW.This obvious electric load is too high,
It can not meet that power network increases the requirement of peak modulation capacity, this just needs to ensure that heat supply is reduced again using new technical measures to realize
Generated output, realize that thermoelectricity decouples.
It is alternative at present to realize that thermoelectricity decoupling technology scheme has much, such as high back pressure thermal power plant unit, that is, the row of raising
Vapour back pressure, go to cool down low pressure (LP) cylinder steam discharge by the use of heat supply network recirculated water as cooling medium, reclaim exhaust steam residual heat, improve external heat supply energy
Power, or do not improve heat capacity and reduce main frame and enter vapour and then reduce generated output.Low pressure (LP) cylinder not air inlet can also be used
Optical axis scheme or the scheme with 3S clutches.Above technical scheme all unfavorable factors are exactly to need the progress to main frame
Change, difficulty are bigger.In addition, also have such as large-scale heat-storage technology and heat recovery technology etc., but these technical measures units
Cost is higher, relatively good during for expanding heat capacity, is such as used to increase peak modulation capacity, realizes that thermoelectricity decouples, then has regulation model
Enclose compared with minor defect.
Utility model content
The technical problem that the utility model solves is to design a kind of enhancing power plant flexibility therrmodynamic system, for strengthening
The flexibility of power plant, meet power peak regulation needs.
To achieve the above object, the utility model adopts the following technical scheme that：One kind enhancing power plant flexibility therrmodynamic system,
Boiler superheater connects high pressure cylinder, boiler reheater connection intermediate pressure cylinder, and intermediate pressure cylinder connects low pressure (LP) cylinder, and low pressure (LP) cylinder connects generator,
Characterized in that, high pressure cylinder entrance is provided with high pressure main stop valve, intermediate pressure cylinder entrance presses stop valve in setting；Superheater and height
High pressure turbine by, high pressure turbine by connection reheater are provided between cylinder pressure；High pressure cylinder connects leading point by height row's check-valves, draws
Point connects high pressure turbine by and reheater by motor-operated isolation valve；Leading point connects temperature-decreased pressure reducer, and temperature-decreased pressure reducer is connected to outer
For steam；Connect low voltage bypass between reheater and intermediate pressure cylinder, low voltage bypass is connected to condenser and outer supplies steam.
The beneficial effects of the utility model are as follows：By controlling the aperture of high pressure main stop valve, reduce as far as possible into high pressure cylinder
Main steam amount, so as to reduce generated output, other main steams then continue to add by the laggard reheater of high pressure turbine by pressure and temperature reducing
Heat, the main steam for entering high pressure cylinder acting on a small quantity is discharged from high pressure cylinder, because now exhaust steam pressure, can not be with high pressure turbine by than relatively low
Pressure afterwards matches, thus by directly supplying steam outside again after setting temperature-decreased pressure reducer adjustment parameter.In addition, pass through control again
The aperture of middle pressure stop valve, on the premise of steam turbine shafting stabilization and low pressure (LP) cylinder minimum cooling flow is met, makes intermediate pressure cylinder as far as possible
Enter vapour less, remaining reheated steam for steam or heating then by drawing gas outward after low voltage bypass pressure and temperature reducing.
Power plant's flexibility can be strengthened by the system, expand the scope of power peak regulation, meeting the premise of heating demand
Under make generation load low as far as possible.By taking 350MW units as an example, the present invention can make electric load reach 30% i.e. below 100MW,
It is simultaneously outer still to can reach 550t/h for heating steam supply.
Brief description of the drawings
Fig. 1 is the utility model embodiment system construction drawing.
Embodiment
As shown in figure 1, a kind of enhancing power plant flexibility therrmodynamic system of the utility model, 1 boiler superheater 2 connection high pressure cylinder
3, the reheater 4 of boiler 1 connection intermediate pressure cylinder 5, intermediate pressure cylinder 5 connects low pressure (LP) cylinder 6, and low pressure (LP) cylinder 6 connects generator 7, and it focuses on, high
The entrance of cylinder pressure 3 is provided with high pressure main stop valve 31, and the entrance of intermediate pressure cylinder 5 presses stop valve 51 in setting；Superheater 2 and high pressure cylinder 3
Between be provided with high pressure turbine by 8, high pressure turbine by 8 connects reheater 4；High pressure cylinder 3 connects leading point 10 by height row's check-valves 11,
Leading point 10 connects high pressure turbine by 8 and reheater 4 by motor-operated isolation valve 14；Leading point 10 connects temperature-decreased pressure reducer 13, desuperheat
Pressure reducer 13, which is connected to, outer supplies steam；Low voltage bypass 15 is connected between reheater 4 and intermediate pressure cylinder 5, low voltage bypass 15 is connected to solidifying
Vapour device and outer supply steam.
By controlling the aperture of high pressure main stop valve, the main steam amount into high pressure cylinder is reduced as far as possible, and other main steams are then led to
The laggard reheater of high pressure turbine by pressure and temperature reducing to be crossed to continue to heat, the main steam for entering high pressure cylinder acting on a small quantity is discharged from high pressure cylinder, but
Because now exhaust steam pressure than relatively low, can not match with the pressure after high pressure turbine by, by setting one-level temperature-decreased pressure reducer to adjust
It is directly outer again after section parameter to supply steam, while one of motor-operated isolation valve need to be set up after the leading point after high row's check-valves.In
This by pressing the aperture of stop valve in control, is meeting the stable premise with low pressure (LP) cylinder minimum cooling flow of steam turbine shafting simultaneously
Under, intermediate pressure cylinder is lacked into vapour as far as possible, remaining reheated steam is drawn gas by outer after low voltage bypass pressure and temperature reducing for steam or heating.
Associated pipe and valve can be set according to demand in this case, this be skilled addressee will appreciate that,
This is repeated no more.
Claims (1)
1. one kind enhancing power plant flexibility therrmodynamic system, boiler superheater connection high pressure cylinder, boiler reheater connection intermediate pressure cylinder, in
Cylinder pressure connects low pressure (LP) cylinder, low pressure (LP) cylinder connection generator, it is characterised in that high pressure cylinder entrance is provided with high pressure main stop valve, middle pressure
Cylinder entrance presses stop valve in setting；High pressure turbine by, high pressure turbine by connection reheater are provided between superheater and high pressure cylinder；It is high
Cylinder pressure connects leading point by height row's check-valves, and leading point connects high pressure turbine by and reheater by motor-operated isolation valve；Leading point
Temperature-decreased pressure reducer is connected, temperature-decreased pressure reducer, which is connected to, outer supplies steam；Low voltage bypass is connected between reheater and intermediate pressure cylinder, by low pressure
Road is connected to condenser and outer supplies steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201720748718.8U CN206845247U (en) | 2017-06-26 | 2017-06-26 | One kind enhancing power plant flexibility therrmodynamic system |
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| CN201720748718.8U CN206845247U (en) | 2017-06-26 | 2017-06-26 | One kind enhancing power plant flexibility therrmodynamic system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592136A (en) * | 2018-07-13 | 2018-09-28 | 大连亨利测控仪表工程有限公司 | A kind of thermal power plant's flexibility transformation twin-tub decoupling depth peak regulation system |
| CN108625911A (en) * | 2018-03-29 | 2018-10-09 | 东北电力大学 | A kind of therrmodynamic system promoting thermal power plant unit electricity output regulating power |
| CN108826413A (en) * | 2018-07-13 | 2018-11-16 | 大连亨利测控仪表工程有限公司 | It is a kind of to utilize intelligence injection pressure reducer auxiliary power plant frequency modulation system |
| CN109113818A (en) * | 2017-06-26 | 2019-01-01 | 中国电力工程顾问集团华北电力设计院有限公司 | A kind of enhancing power plant flexibility therrmodynamic system |
| CN110454248A (en) * | 2019-07-23 | 2019-11-15 | 上海发电设备成套设计研究院有限责任公司 | A kind of heating steam pressurizing transmission system |
-
2017
- 2017-06-26 CN CN201720748718.8U patent/CN206845247U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109113818A (en) * | 2017-06-26 | 2019-01-01 | 中国电力工程顾问集团华北电力设计院有限公司 | A kind of enhancing power plant flexibility therrmodynamic system |
| CN108625911A (en) * | 2018-03-29 | 2018-10-09 | 东北电力大学 | A kind of therrmodynamic system promoting thermal power plant unit electricity output regulating power |
| CN108592136A (en) * | 2018-07-13 | 2018-09-28 | 大连亨利测控仪表工程有限公司 | A kind of thermal power plant's flexibility transformation twin-tub decoupling depth peak regulation system |
| CN108826413A (en) * | 2018-07-13 | 2018-11-16 | 大连亨利测控仪表工程有限公司 | It is a kind of to utilize intelligence injection pressure reducer auxiliary power plant frequency modulation system |
| CN108592136B (en) * | 2018-07-13 | 2023-10-31 | 大连亨利测控仪表工程有限公司 | Double-cylinder decoupling depth peak shaving system for thermal power plant flexible transformation |
| CN110454248A (en) * | 2019-07-23 | 2019-11-15 | 上海发电设备成套设计研究院有限责任公司 | A kind of heating steam pressurizing transmission system |
| CN110454248B (en) * | 2019-07-23 | 2021-12-10 | 上海发电设备成套设计研究院有限责任公司 | Heat supply steam pressure boost conveying system |
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