CN206816307U - A kind of new thermoelectricity decoupling therrmodynamic system - Google Patents

A kind of new thermoelectricity decoupling therrmodynamic system Download PDF

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Publication number
CN206816307U
CN206816307U CN201720750278.XU CN201720750278U CN206816307U CN 206816307 U CN206816307 U CN 206816307U CN 201720750278 U CN201720750278 U CN 201720750278U CN 206816307 U CN206816307 U CN 206816307U
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China
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pressure
cylinder
connection
high pressure
matcher
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袁雄俊
刘利
朱大宏
白杰
赵志刚
聂恒宽
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North China Power Engineering Co Ltd of China Power Engineering Consulting Group
North China Power Engineering Beijing Co Ltd
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North China Power Engineering Co Ltd of China Power Engineering Consulting Group
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Abstract

A kind of new thermoelectricity decoupling 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 connects generator, and high pressure turbine by, high pressure turbine by connection reheater are provided between superheater and high pressure cylinder;Pressure matcher is provided with, pressure matcher connection high pressure turbine by, pressure matcher connects high row's check-valves by leading point, and connects high pressure cylinder;Leading point connects reheater by pipeline, and motor-operated isolation valve is set below leading point;Connection attemperator below pressure matcher, and connecting line.The utility model increases the flexible adjustment of power plant, meets power peak regulation needs.

Description

A kind of new thermoelectricity decoupling therrmodynamic system
Technical field
Power plant field is the utility model is related to, particularly a kind of new thermoelectricity decoupling 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 utility model is applied to realize that thermoelectricity decouples, and increases the flexible adjustment of power plant, meets power peak regulation needs.
To achieve the above object, the utility model adopts the following technical scheme that:A kind of new thermoelectricity decoupling therrmodynamic system, pot Stove superheater connects high pressure cylinder, boiler reheater connection intermediate pressure cylinder, intermediate pressure cylinder connection low pressure (LP) cylinder, low pressure (LP) cylinder connection generator, mistake High pressure turbine by is provided between hot device and high pressure cylinder;It is provided with pressure matcher, pressure matcher connection high pressure turbine by, pressure Orchestration connects high row's check-valves by leading point, and connects high pressure cylinder;Leading point connects reheater, leading point lower section by pipeline Motor-operated isolation valve is set;Connection attemperator below pressure matcher, and connecting line.
Connect low voltage bypass between reheater and intermediate pressure cylinder, low voltage bypass is connected to condenser and outer supplies steam.Attemperator It is connected to and outer supplies steam.
The beneficial effects of the utility model are as follows:Pressure matcher is gone to extract reheating by the use of main steam as driving steam cold The low-pressure steam that section is come, combined voltage regulation is discharged in pressure matcher, can be with if the vapor (steam) temperature of discharge when exceeding desired value It is arranged in series after one-level attemperator reduction temperature to suitable parameters outside for or into reheater, passes through again after pressure matcher Cross after boiler heating and drawn gas again toward for steam or heating by low voltage bypass outlet afterwards again.Vapour can be realized by the system Machine and boiler load it is asynchronous, make steam turbine load as far as possible low, can reach less than 30%, and boiler load can bring up to it is full Foot externally heat demand load such as 60% and more than.
By taking 350MW units as an example, the utility model can make electric load reach 30% i.e. below 100MW, while supply heating outside Steam supply still can reach 550t/h.
Brief description of the drawings
Fig. 1 is the system construction drawing of the utility model embodiment one.
Fig. 2 is the utility model embodiment two system structure chart.
Embodiment
As shown in Figure 1-2, a kind of new thermoelectricity decoupling therrmodynamic system of the utility model, the superheater 2 of boiler 1 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, mistake High pressure turbine by 8 is provided between hot device 2 and high pressure cylinder 3, high pressure turbine by 8 connects reheater 4;Pressure matcher 9 is additionally provided with, is pressed Power adaptation 9 connects high pressure turbine by 8, and pressure matcher 9 connects high row's check-valves 11 by leading point 10, and connects high pressure cylinder 3; Leading point 10 connects reheater 4 by pipeline 12, and motor-operated isolation valve 14 is set below leading point;The lower section of pressure matcher 9 connects Attemperator 13, and connecting line 12.
In the embodiment in figure 1, 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.
In the embodiment of fig. 2, outer to have a two-way for steam, attemperator 13, which is connected to, outer supplies steam.High pressure passes through all the way Supplied outside pressure matcher, low pressure then passes through confession outside low voltage bypass all the way.
Cold section of steam of reheating is connected to pressure matcher after height row's check-valves, simultaneously closes off cold section of the reheating behind leading point Motor-operated isolation valve is set up on pipeline, then is drawn from main steam line or on high pressure turbine by inlet duct and removed pressure match all the way Device can fully closed as needed or part unlatching as driving vapour source, now high pressure turbine by.Wherein pressure matcher can be according to reality Need be designed to more sets in parallel operation.Connect again after pressure matcher one-level attemperator, after reducing pressure matcher Mixed vapour temperature.Treat that parameter adjustment supplies steam or into reheater reheating to properly outer again afterwards, then pass through low pressure Bypass is outer to supply steam or removes heat supply network.
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 (3)

1. a kind of new thermoelectricity decoupling therrmodynamic system, boiler superheater connection high pressure cylinder, boiler reheater connection intermediate pressure cylinder, middle pressure Cylinder connects low pressure (LP) cylinder, low pressure (LP) cylinder connection generator, it is characterised in that high pressure turbine by is provided between superheater and high pressure cylinder, it is high Pressure bypass connection reheater;Pressure matcher, pressure matcher connection high pressure turbine by are provided with, pressure matcher passes through leading point The high row's check-valves of connection, and connect high pressure cylinder;Leading point connects reheater by pipeline, and electronic isolation is set below leading point Valve;Connection attemperator below pressure matcher, and connecting line.
2. a kind of new thermoelectricity decoupling therrmodynamic system as claimed in claim 1, it is characterised in that between reheater and intermediate pressure cylinder Low voltage bypass is connected, low voltage bypass is connected to condenser and outer supplies steam.
3. a kind of new thermoelectricity decoupling therrmodynamic system as claimed in claim 2, it is characterised in that attemperator is connected to outer for steaming Vapour.
CN201720750278.XU 2017-06-26 2017-06-26 A kind of new thermoelectricity decoupling therrmodynamic system Active CN206816307U (en)

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CN201720750278.XU CN206816307U (en) 2017-06-26 2017-06-26 A kind of new thermoelectricity decoupling therrmodynamic system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108468574A (en) * 2018-04-03 2018-08-31 赫普科技发展(北京)有限公司 A kind of system for realizing three kinds of state switchover operations of thermoelectricity unit
CN109113799A (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 novel thermoelectricity decoupling therrmodynamic system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109113799A (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 novel thermoelectricity decoupling therrmodynamic system
CN108468574A (en) * 2018-04-03 2018-08-31 赫普科技发展(北京)有限公司 A kind of system for realizing three kinds of state switchover operations of thermoelectricity unit

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