CN108592008A - A kind of double reheat electricity generation system and its operation method - Google Patents
A kind of double reheat electricity generation system and its operation method Download PDFInfo
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- CN108592008A CN108592008A CN201810502043.8A CN201810502043A CN108592008A CN 108592008 A CN108592008 A CN 108592008A CN 201810502043 A CN201810502043 A CN 201810502043A CN 108592008 A CN108592008 A CN 108592008A
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- steam
- boiler
- reheat
- pressure cylinder
- steam turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
- F22G1/02—Steam superheating characterised by heating method with heat supply by hot flue gases from the furnace of the steam boiler
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- 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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/02—Feed-water heaters, i.e. economisers or like preheaters with water tubes arranged in the boiler furnace, fire tubes, or flue ways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/04—Controlling superheat temperature by regulating flue gas flow, e.g. by proportioning or diverting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
- F22G7/12—Steam superheaters characterised by location, arrangement, or disposition in flues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
- F23C10/08—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases
- F23C10/10—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Turbines (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a kind of double reheat electricity generation system and its operation methods.System includes a boiler, secondary boiler, turbine LP rotors etc..Boiler, secondary boiler include burner hearth, economizer, reheater, low temperature superheater, high temperature superheater etc..Turbo-generator Set includes steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder and generator.Boiler feedwater enters steam turbine high-pressure cylinder and does work by primary/secondary boiler furnace, primary/secondary economizer, primary/secondary low temperature superheater, primary/secondary high-temperature superheater heat exchange successively, single reheat steam after acting enters Steam Turbine Through IP Admission by the heating of single reheat device and does work, double reheat steam after acting enters turbine low pressure cylinder by secondary reheater heating and does work, and drives electrical power generators together.Two boiler combustion systems of the invention independently control, and boiler circuit jointly controls, while ensureing reheating vapour steam temperature so that system operatio is flexible, reliability enhancing.
Description
Technical field
The present invention relates to a kind of double reheat electricity generation system and its operation methods, belong to field of combustion equipment.
Background technology
It is the effective ways for improving thermal power generation steam cycle efficiency to improve steam pressure, temperature and reheating number.At present
Single reheat extra-supercritical unit reaches its maturity, and global reliability, economy are satisfactory.And it develops on this basis secondary
, then generally there is the problem of the temperature of reheated steam deviating on the low side in reheating extra-supercritical unit.The especially adjusting of double reheating, it is negative in part
Under lotus, single reheat steam temperature and double reheat steam temperature all affect the safety of unit and economical, cause double reheat power generation sets
Advantage in terms of improving efficiency is had a greatly reduced quality.And the steam temperature governing speed of double reheat or even the varying duty of entire unit are fast
The serious lag of degree deviates nameplate at low load with steam temperature that single reheat unit performance is mainly reheating, in 80% load,
Just 50 DEG C lower than rated value or so of reheat steam temperature；Under more underload rate, reheat steam temperature is lower, the characteristics of showing uncomfortable peak regulation,
This cannot meet power scheduling needs under China's power generation structural condition.
In order to realize that double reheat, people have carried out various effort.CN206036987U discloses a kind of three flue of tail portion
The double reheat boiler shape of arrangement.In three parallel flues, it is respectively arranged single reheat, double reheat and low temperature superheater,
It adjusts the flow resistance in three flues and adjusts respective caloric receptivity by the flue gas flow of three flues, to adjust
First and second reheat steam temperature.The shortcoming of this regulative mode is influenced each other in mediation process, and complete experience is needed
Based on property.CN102889570A, which discloses a kind of twin flue and is combined with pivot angle burner, adjusts the double reheat of reheat steam temperature
Boiler, wherein reheater is respectively arranged in two parallel flues twice, by the angular adjustment flame of pivot angle burner
Center is used for changing the flue-gas temperature into twin flue, be adjusted with this to adjust the caloric receptivity that burner region belongs to water heating surface
The total caloric receptivity for saving reheated steam in two flues, by gas baffle adjust reheated steam always caloric receptivity in two flues, that is, primary
Distribution between reheating and double reheat passes through the baffle of two flues, adjustment to adjust first and second reheat steam temperature
The heat absorption of one secondary reheater distributes, and by adjusting, burner rubs angle, that is, flame kernel with the hands and auxiliary is with the micro- of excess air coefficient
It adjusts, realizes that first and second reheat steam temperature reaches nameplate.This regulative mode is related by the regulating effect of pivot angle burner.
CN103574588A discloses a kind of double reheat boiler, is adjusted using baffle and flue gas recirculation is used in combination, single reheat
Device and secondary reheater are located in two flues arranged side by side, are adjusted in two flues by the variation of flue gas recirculation flow
Total caloric receptivity of reheated steam.The advantage of this regulative mode is that the logical relation of reheat steam temperature adjusting twice is clear.But flue gas
Recycling needs to consume power consumption, particularly disadvantageous in less than 50% load operation.CN206846691U discloses a kind of double reheat
Boiler, is adjusted and the method for two-stage flue gas recirculation using baffle, i.e. lower two layers of arrangement flue gas recirculation on the burner, is used for reference
Adjusting of the burner pivot angle to flame kernel in CN102889570A, to having baffle adjusting, flue gas recirculation, adjusting
Flame kernel.These arrangements all attempt to alleviate double reheat boiler reheater steam temperature regulation problem.In order to further will twice again
Hot vapour temperature adjusts mutually decoupling, and CN102913892A discloses a kind of boiler of T-type arrangement, so that first and second reheater
Twin flue where respectively is completely separable, i.e. two tail portions of a burner hearth are to flow through shaft.CN106949451A provides one kind two
Secondary reheating ultra-supercritical boiler and its heated surface arrangement method, the method by the way that reheater on wall is arranged in burner hearth, improve part
Reheater Heat absorption fraction on wall under load, so as to improve reheat steam temperature, since to be simutaneously arranged single reheat device low for reheater on wall
Temperature section and secondary reheater low-temperature zone, therefore, first and second reheat steam temperature can improve simultaneously.The method of CN205878138U with it is upper
It states similar, but more specifies that front-back wall is arranged symmetrically single reheat device, left and right wall is arranged symmetrically secondary reheater.These designs are all
The Steam Temperature Problems of double reheat power generation sets can not thoroughly be solved.
Invention content
The double reheat electricity generation system made of two boilers, a steam turbine organic assembling that the present invention provides a kind of and
Its operation method, preheating, evaporation, overheat and the 100% single reheat load of a boiler band 50% or so, another boiler band
Remaining preheating, evaporation, overheat and 100% double reheat load, two boiler combustion systems independently control, boiler circuit
Jointly control, and matches with steam turbine.
The present invention is achieved through the following technical solutions：
A kind of double reheat electricity generation system the system comprises a boiler, secondary boiler, turbine LP rotors and is given
Water pump, a boiler include a boiler furnace, an economizer, single reheat device, a low temperature superheater, primary height
Warm superheater, a steam-water separator；The secondary boiler includes secondary boiler furnace, secondary economizer, secondary reheater, two
Secondary low temperature superheater, secondary high-temperature superheater, secondary steam-water separator；Boiler furnace and the secondary boiler furnace
Select water wall structure；The Turbo-generator Set includes the steam turbine high-pressure cylinder being sequentially connected, Steam Turbine Through IP Admission, steam turbine
Low pressure (LP) cylinder and generator；The system also includes the condensers being connected between the turbine low pressure cylinder and the feed pump；
The feed pump passes through a main feed water pipe road, secondary main feed water pipe road and an economizer, secondary economizer phase respectively
Even；Economizer and the secondary economizer pass through steam-water pipeline and a boiler furnace and secondary boiler respectively
The water wall structure of burner hearth connects；Boiler furnace water wall structure by steam-water pipeline successively with a steam-water separation
Device, a low temperature superheater, a high temperature superheater are connected with steam turbine high-pressure cylinder, and connect the high temperature superheater with
Once main steam valve is set on a main steam line between the steam turbine high-pressure cylinder；The steam turbine high-pressure cylinder passes through
Cold single reheat jet chimney is connected with the single reheat device entrance, and is provided with one on the cold single reheat jet chimney
Secondary reheating cold end shut-off valve；The single reheat device outlet is connected by hot single reheat jet chimney with Steam Turbine Through IP Admission,
It is provided with single reheat hot junction shut-off valve on the hot single reheat jet chimney；The water wall structure of the secondary boiler furnace
By steam-water pipeline successively with secondary steam-water separator, secondary low temperature superheater, secondary high-temperature superheater and steam turbine high-pressure cylinder
It is connected, and connects and be provided with two on the secondary main steam line between the secondary high-temperature superheater and the steam turbine high-pressure cylinder
Secondary main steam valve；The Steam Turbine Through IP Admission is connected by cold double reheat jet chimney with the secondary reheater entrance, and
It is provided with double reheat cold end shut-off valve on the cold double reheat jet chimney；The secondary reheater outlet is secondary by heat
Reheaing steam pipe is connected with turbine low pressure cylinder, and double reheat hot junction pass is provided on the hot double reheat jet chimney
Disconnected valve.
It is tandem from high to low by flue-gas temperature in above-mentioned technical proposal, it is a high temperature superheater, primary low
Warm superheater, an economizer are sequentially arranged from front to back, single reheat device setting a low temperature superheater it
It is preceding or be set up in parallel with a low temperature superheater；The secondary high-temperature superheater, secondary low temperature superheater, secondary economizer
Be sequentially arranged from front to back, the secondary reheater be arranged before the secondary low temperature superheater or with the secondary low temperature mistake
Hot device is arranged in juxtaposition.
In above-mentioned technical proposal, single reheat device outlet by hot single reheat jet chimney also with the steam turbine
High pressure cylinder be connected, and with single reheat steam short valve is provided on the steam turbine high-pressure cylinder connecting line；The heat is primary
Connecting line between reheaing steam pipe and the steam turbine high-pressure cylinder and the Steam Turbine Through IP Admission is in parallel.
In above-mentioned technical proposal, the secondary reheater outlet passes through in hot double reheat jet chimney and the steam turbine
Cylinder pressure be connected, and with double reheat steam short valve is provided on the Steam Turbine Through IP Admission connecting line；The heat is secondary again
Connecting line between vapours pipeline and steam turbine described in the Steam Turbine Through IP Admission and low pressure (LP) cylinder is in parallel.
Once twin flue partition wall can be set in the flue of boiler, it can be in the flue of the secondary boiler
It is provided with secondary twin flue partition wall, a twin flue partition wall or secondary twin flue partition wall are arranged in parallel with flue gas flow direction, make
Single flue is obtained to be spaced as the parallel twin flue that is set up in parallel parallel with flue gas flow direction.
In above-mentioned technical proposal, a boiler selects coal-powder boiler or circulating fluidized bed boiler；The secondary boiler choosing
With coal-powder boiler or circulating fluidized bed boiler.
It is described primary when a boiler and/or secondary boiler select circulating fluidized bed boiler in above-mentioned technical proposal
Boiler further includes cyclone separator and a returning charge valve being arranged below a cyclone separator；The secondary pot
Stove further includes secondary cyclone separator and the secondary returning charge valve that is arranged below the secondary cyclone separator.
As further improved technical solution, a boiler and/or secondary boiler select circulating fluidized bed boiler
When, a boiler further includes that a heat exchange bed being arranged below a cyclone separator and setting are once being returned
Expect a flow divider at the top of valve；High temperature superheater is arranged in a heat exchange bed, the single reheat device
Be arranged it is more than two, and one of which single reheat device be arranged in a heat exchange bed；The secondary boiler further includes setting
Secondary heat exchange bed below the secondary cyclone separator and the second diffluence valve being arranged at the top of secondary returning charge valve；It is described
Secondary high-temperature superheater is arranged in the secondary heat exchange bed, and the secondary reheater setting is more than two, and one of which two
Secondary reheater is arranged in the secondary heat exchange bed.
A kind of double reheat operation of electric power system method includes：
After boiler feedwater is pressurizeed via feed pump, so that a part of boiler feedwater is flowed through a main feed water pipe road and enter once
Economizer of boiler is introduced into a boiler furnace water wall structure after an economizer heats, in primary pot
Rise in stove furnace water cooling wall construction and is heated as steam water interface and enters a steam-water separator；No. one time steam-water separator is made
For channel so that vapor is introduced into a low temperature superheater successively and a high temperature superheater heating reaches target component, so
Steam turbine high-pressure cylinder is sent to by a main steam line afterwards；
Make a part of boiler feedwater after secondary main feed water pipe road enters the preheating of secondary economizer, by the boiler after preheating
Water supply, which is introduced into secondary boiler furnace water wall structure after heating, to be become steam water interface and enters secondary steam-water separator；It is secondary
Steam-water separator is as steam-water channel so that vapor is introduced into secondary low temperature superheater and the heating of secondary high-temperature superheater successively
Reach target component, steam turbine high-pressure cylinder is then sent to by secondary main steam line；
Make to come from secondary boiler in vapor and secondary main steam line in a main steam line from a boiler
Vapor merge, together be sent into enter steam turbine high-pressure cylinder do work；
Make steam turbine high-pressure cylinder do work after from its outlet discharge single reheat steam, by cold single reheat jet chimney into
Enter single reheat device, Steam Turbine Through IP Admission acting is entered by hot single reheat jet chimney after so that it is heated to rated temperature；
Make Steam Turbine Through IP Admission do work after be discharged double reheat steam, by cold double reheat jet chimney enter it is secondary again
Hot device enters turbine low pressure cylinder expansion work, with vapour after so that it is heated to rated temperature by hot double reheat jet chimney
Turbine high pressure cylinder, Steam Turbine Through IP Admission drive electrical power generators together；
Turbine low pressure cylinder steam discharge is condensed into water by condenser, then is pressurizeed by feed pump.
A kind of double reheat operation of electric power system method further includes when under a boiler stop condition：
A main steam valve is turned off, after so that boiler feedwater is pressurizeed via feed pump, is entered by secondary main feed water pipe road
After the secondary economizer preheating of secondary boiler, the boiler feedwater after preheating is introduced into secondary boiler furnace water wall structure and is heated
Become steam water interface afterwards and enters secondary steam-water separator；Secondary steam-water separator is as steam-water channel so that vapor according to
It is secondary be introduced into secondary low temperature superheater and secondary high-temperature superheater heating reach target component, then pass through secondary main steam line
It is sent to steam turbine high-pressure cylinder acting；
Single reheat cold end shut-off valve and single reheat hot junction shut-off valve are turned off, single reheat steam short valve is opened, makes
It is directly entered Steam Turbine Through IP Admission acting from the single reheat steam of steam turbine high-pressure cylinder outlet discharge；
Make Steam Turbine Through IP Admission do work after be discharged double reheat steam, by cold double reheat jet chimney enter it is secondary again
Hot device enters turbine low pressure cylinder expansion work, with vapour after so that it is heated to rated temperature by hot double reheat jet chimney
Turbine high pressure cylinder, Steam Turbine Through IP Admission drive electrical power generators together；
Turbine low pressure cylinder steam discharge is condensed into water by condenser, then is pressurizeed by feed pump.
A kind of double reheat operation of electric power system method further includes under the conditions of secondary boiler is out of service：
Secondary main steam valve is turned off, after so that boiler feedwater is pressurizeed via feed pump, a main feed water pipe road is flowed through and enters
Economizer of boiler is introduced into a boiler furnace water wall structure after an economizer heats, one
Rise in secondary boiler furnace water wall structure and is heated as steam water interface and enters a steam-water separator；Steam-water separation
Device is as channel so that vapor is introduced into a low temperature superheater successively and a high temperature superheater heating reaches target ginseng
Then number is sent to steam turbine high-pressure cylinder acting by a main steam line；
Make steam turbine high-pressure cylinder do work after from its outlet discharge single reheat steam, by cold single reheat jet chimney into
Enter single reheat device, Steam Turbine Through IP Admission acting is entered by hot single reheat jet chimney after so that it is heated to rated temperature；
Double reheat cold end shut-off valve and double reheat hot junction shut-off valve are turned off, double reheat steam short valve is opened, makes
The double reheat steam being discharged after Steam Turbine Through IP Admission acting is directly entered turbine low pressure cylinder acting；
Turbine low pressure cylinder steam discharge is condensed into water by condenser, then is pressurizeed by feed pump.
Beneficial effects of the present invention are：1) preparation of two boilers, a steam turbine is combined, two boiler combustion systems difference
Independent control, boiler circuit jointly control, while ensureing reheating vapour steam temperature so that system operatio is flexible, reliability enhancing；
2) it when accident occurs in a boiler in two boilers, can be run with a boiler one conveyer；3) when underload, in order to reduce station service,
System can be reduced to a boiler one conveyer operation；) power generation underload ability it is lower, generally below 25%.
Description of the drawings
Fig. 1 is the double reheat electricity generation system schematic diagram of one of which embodiment according to the present invention.
Fig. 2 is the double reheat electricity generation system schematic diagram of another embodiment according to the present invention.
Fig. 3 is the double reheat electricity generation system schematic diagram of the third embodiment according to the present invention.
Fig. 4 is the double reheat electricity generation system schematic diagram of the 4th kind of embodiment according to the present invention.
In figure：Economizer of 1-；2- single reheat devices；Low temperature superheater of 3-；High temperature superheater of 4-；5- mono-
Secondary boiler furnace；Gas baffle of 6-；Steam-water separator of 7-；8- primary combustion devices；Main steam valve of 9-；10-
Twin flue partition wall；The cold single reheat jet chimneys of 11-；The hot single reheat jet chimneys of 12-；The cold double reheat steam of 13-
Pipeline；The hot double reheat jet chimneys of 14-；15- steam turbine high-pressure cylinders；16- Steam Turbine Through IP Admissions；17- turbine low pressure cylinders；
18- generators；19- condensers；20- feed pumps；No. bis- economizers of 21-；22- secondary reheaters；Bis- low temperature superheaters of 23-；
24- secondary high-temperature superheaters；Bis- boiler furnaces of 25-；26- secondary flue gas baffles；No. bis- steam-water separators of 27-；Bis- combustions of 28-
Burner；Bis- main steam valves of 29-；Bis- twin flue partition walls of 30-；Main steam line of 31-；Bis- main steam lines of 32-；
33- single reheat steam short valves；34- single reheat cold end shut-off valves；35- single reheats hot junction shut-off valve；36- double reheats
Steam short valve；37- double reheat cold end shut-off valves；38- double reheats hot junction shut-off valve；The main feed water pipe road 39-；40-
Secondary main feed water pipe road；Economizer hopper of 41-；42- primary air preheaters；Hot air duct of 43-；44- is once removed
Dirt device；Pressure fan of 45-；WESP of 46-；Denitration ammonia-gas spraying device of 47-；SCR of 48-；Air-introduced machine of 49-；
Flue gas desulfurization device of 50-；Bis- economizer hoppers of 51-；52- auxiliary air preheaters；53- secondary hot-air pipelines；54- bis-
Secondary deduster；55- second blowers；No. bis- air-introduced machines of 56-；Bis- denitration ammonia-gas spraying devices of 57-；Bis- SCR of 58-；59- secondary fumes
Desulfurization；Bis- WESP of 60-；Cyclone separator of 61-；Returning charge valve of 62-；SNCR of 63-；64- secondary cyclones point
From device；Bis- returning charge valves of 65-；Bis- SNCR of 66-；67- primary fuel imports；68- secondary fuel imports；Heat exchange bed of 69-；
70- secondary heat exchange beds；Flow divider of 71-；70- second diffluence valves.
Specific implementation mode
Concrete structure, operation method and the implementation of the present invention are discussed in detail with embodiment below in conjunction with the accompanying drawings
It states.
The orientation such as upper, lower, left, right, front and rear in present specification term be position relationship based on ... shown in the drawings and
It establishes.Attached drawing is different, then corresponding position relationship is also possible to change therewith, therefore cannot be interpreted as with this to protecting model
The restriction enclosed.
As shown in Figures 1 to 4, a kind of double reheat electricity generation system, including a boiler, secondary boiler, steam turbine power generation
Unit and feed pump 20.Wherein, boiler include 5, economizers 1 of a boiler furnace, it is single reheat device 2, primary low
The steam-water separator 7 of high temperature superheater No. 4, one times of warm superheater 3, one times；Secondary boiler includes secondary boiler furnace 25, secondary province's coal
Device 21, secondary reheater 22, secondary low temperature superheater 23, secondary high-temperature superheater 24, secondary steam-water separator 27.Boiler
Burner hearth 5 and the secondary boiler furnace 25 select water wall structure, are respectively equipped with water-cooling wall lower header and water-cooling wall upper collecting chamber.Vapour
Turbine generator group includes the steam turbine high-pressure cylinder 15 being sequentially connected, Steam Turbine Through IP Admission 16, turbine low pressure cylinder 17 and generator
18.System further includes the condenser 19 being connected between turbine low pressure cylinder 17 and feed pump 20.
Boiler and secondary boiler can select coal-powder boiler or circulating fluidized bed boiler.
When boiler and/or secondary boiler select circulating fluidized bed boiler, a boiler further includes a cyclonic separation
Device 61 and a returning charge valve 62 being arranged below a cyclone separator 61；Secondary boiler further includes secondary cyclone separator 64
With the secondary returning charge valve 65 being arranged below secondary cyclone separator 64.
Typically, it is from high to low tandem by flue-gas temperature as shown in Fig. 1 to Fig. 3, a high temperature superheater 4,
3, economizers 1 of low temperature superheater are sequentially arranged from front to back, and single reheat device 2 is arranged in a low temperature superheater 3
It is set up in parallel before or with a low temperature superheater 3.Secondary high-temperature superheater 24, secondary low temperature superheater 23, secondary economizer
21 are sequentially arranged from front to back, secondary reheater 22 be arranged before secondary low temperature superheater 23 or with secondary low temperature superheater 23
It is arranged in juxtaposition.
Embodiment as shown in Figure 1, a boiler and secondary boiler select tower pulverized-coal fired boiler, boiler furnace 5
Once twin flue partition wall 10 is set in the flue of top, be provided in the top flue of secondary boiler furnace 25 secondary twin flue every
Wall 30, a twin flue partition wall 10 and secondary twin flue partition wall 30 are arranged in parallel with flue gas flow direction so that single flue is spaced
For the parallel twin flue that is set up in parallel parallel with flue gas flow direction.At this point, single reheat device 2 and a low temperature superheater 3 are arranged side by side
It is arranged in the flue of 10 both sides of twin flue partition wall, secondary reheater 22 and secondary low temperature superheater 23 are disposed in parallel in two
In the flue of secondary 30 both sides of twin flue partition wall.In addition, an economizer 1 and secondary economizer 21 are respectively provided with two groups, two groups primary
Economizer is disposed in parallel in the flue of 10 both sides of twin flue partition wall, and two groups of secondary economizers are disposed in parallel in secondary double cigarettes
In the flue of 30 both sides of road partition wall.In the end of the parallel i.e. one time twin flue partition wall 10 in twin flue exit of a boiler, setting
Once gas baffle 6, the cigarette for flowing through a low temperature superheater 3 and single reheat device 2 can be adjusted by adjusting a gas baffle 6
Throughput, to adjust single reheat steam steam temperature.In the parallel twin flue exit of secondary boiler, that is, secondary twin flue partition wall 30
End, be provided with secondary flue gas baffle 26, adjust secondary flue gas baffle 26 and can adjust and flows through 23 He of secondary low temperature superheater
The flue gas flow of secondary reheater 22, to adjust double reheat steam steam temperature.
In the same embodiment, a boiler and the same type of furnace of secondary Boiler pipe, Fig. 2 and Fig. 3 are implemented for operating easily,
Example selects П types pulverized-coal fired boiler and circulating fluidized bed boiler respectively.As with the embodiments shown in figures 2 and 3, after a boiler furnace 5
Once twin flue partition wall 10 is set in portion's flue, secondary twin flue partition wall is provided in 25 rear portion flue of secondary boiler furnace
30, a twin flue partition wall 10 and secondary twin flue partition wall 30 are arranged in parallel with flue gas flow direction so that single flue be spaced for
The parallel twin flue that is set up in parallel parallel with flue gas flow direction.Single reheat device 2 and secondary reheater 22 are all arranged two groups, wherein
One group of single reheat device 2 and a low temperature superheater 3 are disposed in parallel in the flue of 10 both sides of twin flue partition wall, wherein one
Group secondary reheater 22 and secondary low temperature superheater 23 are disposed in parallel in the flue of secondary 30 both sides of twin flue partition wall.In addition,
Economizer 1 and secondary economizer 21 are respectively provided with three groups, and two groups of economizers are disposed in parallel in a twin flue partition wall 10
In the flue of both sides, two groups of secondary economizers are disposed in parallel in the flue of secondary 30 both sides of twin flue partition wall.In a boiler
Once gas baffle 6 are arranged in the end of the parallel i.e. one time twin flue partition wall 10 in twin flue exit, adjust a gas baffle
6 can adjust the flue gas flow for flowing through a low temperature superheater 3 and single reheat device 2, to adjust single reheat steam steam temperature.
Another group of economizer is arranged in the flue at 6 downstream of gas baffle.In the parallel twin flue exit of secondary boiler
That is the end of secondary twin flue partition wall 30 is provided with secondary flue gas baffle 26, adjusts secondary flue gas baffle 26 and can adjust and flows through
The flue gas flow of secondary low temperature superheater 23 and secondary reheater 22, to adjust double reheat steam steam temperature.Another group secondary
Economizer is arranged in the flue at 26 downstream of secondary flue gas baffle.The last organizes an economizer and the last secondary province's coal of group
Flue below device is respectively formed Zigzag type flue, and once economizer hopper 41 and secondary economizer hopper is respectively set
51。
Embodiment as shown in Figure 4, a boiler and secondary Boiler pipe carry the circulating fluidized bed boiler of heat exchange bed.This
When, a boiler further includes a heat exchange bed 69 being arranged below a cyclone separator 61 and is arranged in a returning charge valve
Flow divider 71 at 62 tops.The aperture of flow divider 71 of adjusting, which can adjust to enter, is disposed with changing for single reheat device 2
Thermal material flow in hott bed is realized with this to the caloric receptivity of the single reheat device 2 i.e. control of steam temperature of single reheat steam.At this point,
High temperature superheater 4 can also be arranged in a heat exchange bed 69.Meanwhile single reheat device 2 be arranged it is more than two, and its
In one group of single reheat device be arranged in a heat exchange bed 69.It is tandem from high to low by flue-gas temperature, another group once again
3, economizers 1 of hot device and a low temperature superheater are sequentially arranged from front to back.Secondary boiler further includes being arranged in secondary rotation
The secondary heat exchange bed 70 of 64 lower section of wind separator and the second diffluence valve 72 being arranged at the top of secondary returning charge valve 65.It adjusts secondary
The aperture of flow divider 72 can be adjusted into being disposed with thermal material flow in the heat exchange bed of secondary reheater 22, be realized pair with this
The caloric receptivity of secondary reheater 22 is the control of steam temperature of double reheat steam.Secondary high-temperature superheater 24 is arranged in secondary heat exchange bed 70
It is interior, secondary reheater 22 be arranged it is more than two, and one of which secondary reheater be arranged in secondary heat exchange bed 70.By flue-gas temperature
Be tandem from high to low, another group of secondary reheater and secondary low temperature superheater 23, secondary economizer 21 from front to back according to
Secondary arrangement.The flue of 21 lower section of economizer 1 and secondary economizer is respectively formed Zigzag type flue, and is respectively set once
Economizer hopper 41 and secondary economizer hopper 51.
For above-mentioned several embodiments, no matter the arrangement of economizer, low temperature superheater, high temperature superheater and reheater
Position is similar or not exactly the same, and the connection relation of boiler circuit is similar.
Feed pump 20 passes through a main feed water pipe road 39, secondary main feed water pipe road 40 and an economizer 1, secondary province respectively
Coal device 21 is connected.Economizer 1 and secondary economizer 21 pass through steam-water pipeline and a boiler furnace and secondary boiler respectively
The water wall structure of burner hearth 25 connects.5 water wall structure of boiler furnace by steam-water pipeline successively with a steam-water separation
The high temperature superheater 4 of low temperature superheater 3, one times of device 7, one times and steam turbine high-pressure cylinder 15 connect, and connect a high temperature superheater 4
Once main steam valve 9 are set on a main steam line 31 between steam turbine high-pressure cylinder 15.Steam turbine high-pressure cylinder 15 goes out
Mouth is connected by cold single reheat jet chimney 11 with 2 entrance of single reheat device, and is arranged on cold single reheat jet chimney 11
Once reheating cold end shut-off valve 34.The outlet of single reheat device 2 passes through hot single reheat jet chimney 12 and Steam Turbine Through IP Admission
16 are connected, and single reheat hot junction shut-off valve 35 is provided on hot single reheat jet chimney 12.The water cooling of secondary boiler furnace 25
Wall construction by steam-water pipeline successively with secondary steam-water separator 27, secondary low temperature superheater 23, secondary high-temperature superheater 24 and
Steam turbine high-pressure cylinder 15 is connected, and connects the secondary main steam line between secondary high-temperature superheater 24 and steam turbine high-pressure cylinder 15
Secondary main steam valve 29 is provided on 32.Steam Turbine Through IP Admission 16 passes through cold double reheat jet chimney 13 and secondary reheater 22
Entrance is connected, and double reheat cold end shut-off valve 37 is provided on cold double reheat jet chimney 13.Secondary reheater 22 exports
It is connected with turbine low pressure cylinder 17 by hot double reheat jet chimney 14, and two is provided on hot double reheat jet chimney 14
Secondary reheating hot junction shut-off valve 38.
The outlet of single reheat device 2 is also connected with steam turbine high-pressure cylinder 15 by hot single reheat jet chimney 12, and and vapour
Single reheat steam short valve 33 is provided on 15 connecting line of turbine high pressure cylinder.Hot single reheat jet chimney 12 and steam turbine
Connecting line between high pressure cylinder 15 and Steam Turbine Through IP Admission 16 is parallel connection.
The outlet of secondary reheater 22 is connected by hot double reheat jet chimney 14 with Steam Turbine Through IP Admission 16, and and steamer
Double reheat steam short valve 36 is provided on 16 connecting line of machine intermediate pressure cylinder.In hot double reheat jet chimney 14 and steam turbine
Connecting line between 17 steam turbine of cylinder pressure 16 and low pressure (LP) cylinder is parallel connection.
When boiler and secondary boiler normal operation：
After boiler feedwater is pressurizeed via feed pump 20, so that a part of boiler feedwater is flowed through a main feed water pipe road 39 and enter
Economizer 1 of boiler is introduced into after an economizer 1 heats in 5 water wall structure of boiler furnace,
Rise in 5 water wall structure of boiler furnace and is heated as steam water interface and enters a steam-water separator 7；Carbonated drink
Separator 7 is used as channel so that vapor is introduced into a low temperature superheater 3 successively and a heating of high temperature superheater 4 reaches
Then target component is sent to steam turbine high-pressure cylinder 15 by a main steam line 31；
Make a part of boiler feedwater after secondary main feed water pipe road 40 enters the preheating of secondary economizer 21, after preheating
Boiler feedwater, which is introduced into 25 water wall structure of secondary boiler furnace after heating, to be become steam water interface and enters secondary steam-water separation
Device 27；Secondary steam-water separator 27 is used as steam-water channel so that vapor is introduced into secondary low temperature superheater 23 and secondary successively
The heating of high temperature superheater 24 reaches target component, is then sent to steam turbine high-pressure cylinder 15 by secondary main steam line 32；
Make in a main steam line 31 interior vapor and secondary main steam line 32 from a boiler from secondary
The vapor of boiler merges, and is sent into enters the acting of steam turbine high-pressure cylinder 15 together；
From its outlet discharge single reheat steam after making steam turbine high-pressure cylinder 15 do work, pass through cold single reheat jet chimney
11 enter single reheat device 2, are entered in steam turbine by hot single reheat jet chimney 12 after so that it is heated to rated temperature and are pressed
Cylinder 16 does work；
Double reheat steam is discharged after so that Steam Turbine Through IP Admission 16 is done work, enters two by cold double reheat jet chimney 13
Secondary reheater 22 enters turbine low pressure cylinder 17 by hot double reheat jet chimney 14 after so that it is heated to rated temperature and expands
Acting drives generator 18 to generate electricity together with steam turbine high-pressure cylinder 15, Steam Turbine Through IP Admission 16；
17 steam discharge of turbine low pressure cylinder is condensed into water by condenser 19, then is pressurizeed by feed pump 20.
When a boiler is under emergency conditions or is too low out of service because of load：
A main steam valve 9 is turned off, after so that boiler feedwater is pressurizeed via feed pump 20, by secondary main feed water pipe road 40
Into after the preheating of secondary economizer 21 of secondary boiler, the boiler feedwater after preheating is introduced into secondary 25 water-cooling wall knot of boiler furnace
Become steam water interface after being heated in structure and enters secondary steam-water separator 27；Secondary steam-water separator 27 is used as steam-water channel,
So that vapor is introduced into secondary low temperature superheater 23 successively and the heating of secondary high-temperature superheater 24 reaches target component, then lead to
It crosses secondary main steam line 32 and is sent to the acting of steam turbine high-pressure cylinder 15；
Single reheat cold end shut-off valve 34 and single reheat hot junction shut-off valve 35 are turned off, single reheat steam short valve is opened
33, so that the single reheat steam from the outlet of steam turbine high-pressure cylinder 15 discharge is directly entered Steam Turbine Through IP Admission 16 and does work；
Double reheat steam is discharged after so that Steam Turbine Through IP Admission 16 is done work, enters two by cold double reheat jet chimney 13
Secondary reheater 22 enters turbine low pressure cylinder 17 by hot double reheat jet chimney 14 after so that it is heated to rated temperature and expands
Acting drives generator 18 to generate electricity together with steam turbine high-pressure cylinder 15, Steam Turbine Through IP Admission 16；
17 steam discharge of turbine low pressure cylinder is condensed into water by condenser 19, then is pressurizeed by feed pump 20.
When secondary boiler is under emergency conditions or is too low out of service because of load：
Secondary main steam valve 29 is turned off, after so that boiler feedwater is pressurizeed via feed pump 20, flows through a main feed water pipe road
39 enter an economizer 1 of a boiler, and a 5 water-cooling wall knot of boiler furnace is introduced into after an economizer 1 heats
In structure, rises in 5 water wall structure of boiler furnace and be heated as steam water interface and enter a steam-water separator 7；
No. one time steam-water separator 7 is used as channel so that vapor is introduced into a low temperature superheater 3 and a high temperature superheater 4 successively
Heating reaches target component, is then sent to steam turbine high-pressure cylinder 15 by a main steam line 31 and does work；
From its outlet discharge single reheat steam after making steam turbine high-pressure cylinder 15 do work, pass through cold single reheat jet chimney
11 enter single reheat device 2, are entered in steam turbine by hot single reheat jet chimney 12 after so that it is heated to rated temperature and are pressed
Cylinder 16 does work；
Double reheat cold end shut-off valve 37 and double reheat hot junction shut-off valve 38 are turned off, double reheat steam short valve is opened
36, the double reheat steam being discharged after making Steam Turbine Through IP Admission 16 do work is directly entered the acting of turbine low pressure cylinder 17；
17 steam discharge of turbine low pressure cylinder is condensed into water by condenser 19, then is pressurizeed by feed pump 20.
Only in a boiler startup/shutdown, steam-water separator 7 carries out steam-water separation, and a boiler is normally transported
When row, No. one time steam-water separator 7 is only used as channel.Similarly, the only secondary steam-water separator 27 in secondary boiler startup/shutdown
Steam-water separation is carried out, and when secondary boiler normal operation, secondary steam-water separator 27 is only used as channel.
And since the type of furnace selected by several embodiments is different, the arrangement of combustion system and exhaust treatment system is also incomplete
It is identical.
As depicted in figs. 1 and 2, when a boiler and secondary boiler select coal-powder boiler, one time boiler furnace 5 is provided with one
Secondary burner 8.Required air of boiler combustion of pressurization of pressure fan 45, is preheating to by primary air preheater 42
After certain temperature, primary combustion device 8 is sent by a hot air duct 43, after-flame produces in a boiler furnace 5 together with fuel
Raw high-temperature flue gas.High-temperature flue gas and water wall structure, a high temperature superheater 4,2, low temperature superheaters 3 of single reheat device and
After heat exchange of economizer 1, high-temperature flue gas is cooled, is then down at 320~420 DEG C by a denitration ammonia-gas spraying device in smoke temperature
47 are added denitrfying agent, efficiently restore the NOx that burning generates in a SCR (selective catalytic reduction) 48, and flue gas passes through later
It crosses the heat exchange of primary air preheater 42 to continue to cool down, under the action of air-introduced machine 49, successively be removed by disposable dust remover 44
Dirt, 50 desulfurization of flue gas desulfurization device and a WESP (wet-esp) 46 purify to smoke stack emission.It is therein primary
WESP46 is that item may be selected.
Secondary boiler furnace 25 is provided with secondary burner 28.The secondary boiler combustion of pressurizeing of second blower 55 is required
Air is sent into secondary burner 28 after auxiliary air preheater 52 is preheating to certain temperature by secondary hot-air pipeline 53, with
After-flame generates high-temperature flue gas to fuel in secondary boiler furnace 25 together.High-temperature flue gas is overheated with water wall structure, secondary high-temperature
After device 24, secondary reheater 22, secondary low temperature superheater 23 and secondary economizer 21 exchange heat, high-temperature flue gas is cooled, in smoke temperature
It is down at 320~420 DEG C and denitrfying agent is added by secondary denitration ammonia-gas spraying device 57, the NOx high for generating burning in secondary SCR58
Effect restores, and flue gas continues to cool down by the heat exchange of auxiliary air preheater 52 later, under the action of secondary air-introduced machine 59, successively passes through
54 dedusting of secondary filter, 60 desulfurization of secondary flue gas desulfurization and secondary WESP56 is crossed to purify to smoke stack emission.It is therein secondary
WESP56 is that item may be selected.
As shown in figure 3, when a boiler and secondary boiler select circulating fluidized bed boiler, 5 side of boiler furnace
It is provided with primary fuel import 67, primary fuel import 67 while the also entrance as a desulphurizer of boiler.Secondary Boiler Furnace
25 side of thorax is provided with secondary fuel import 68, secondary fuel import 68 while the also entrance as secondary desulphurizer of boiler.It is right
For circulating fluidized bed boiler, high-temperature flue gas is introduced into cyclone separator and carries out gas solid separation when being come out from furnace outlet, then
Back-end ductwork is entered back into exchange heat with reheater, low temperature superheater and economizer.
Regardless of circulating fluidized bed boiler as shown in Figure 3, or the recirculating fluidized bed pot with heat exchange bed as shown in Figure 4
Stove can arrange high temperature superheater (including a high temperature superheater 4 and secondary high-temperature superheater 24) and again in boiler furnace
Hot device (including single reheat device 2 and secondary reheater 22).
SNCR (selective non-catalytics can be arranged with cyclone separator interface channel in the furnace outlet of circulating fluidized bed boiler
Reduction) device, correspondingly, once SNCR63,25 exit of secondary boiler furnace are arranged for 5 exit of a boiler furnace setting
There is secondary SNCR66.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of double reheat electricity generation system, it is characterised in that：The system comprises a boiler, secondary boiler, steam turbine hairs
Motor group and feed pump (20), a boiler include a boiler furnace (5), economizer (1), a single reheat device
(2), a low temperature superheater (3), a high temperature superheater (4), a steam-water separator (7)；The secondary boiler includes two
Secondary boiler furnace (25), secondary economizer (21), secondary reheater (22), secondary low temperature superheater (23), secondary high-temperature overheat
Device (24), secondary steam-water separator (27)；Boiler furnace (5) and the secondary boiler furnace (25) select water-cooling wall
Structure；The Turbo-generator Set includes that the steam turbine high-pressure cylinder (15) being sequentially connected, Steam Turbine Through IP Admission (16), steam turbine are low
Cylinder pressure (17) and generator (18)；The system also includes be connected to the turbine low pressure cylinder (17) and the feed pump (20)
Between condenser (19)；The feed pump (20) passes through a main feed water pipe road (39), secondary main feed water pipe road (40) respectively
It is connected with an economizer (1), secondary economizer (21)；Economizer (1) and the secondary economizer (21)
It is connect respectively with the water wall structure of a boiler furnace (5) and secondary boiler furnace (25) by steam-water pipeline；It is described
Boiler furnace (5) water wall structure by steam-water pipeline successively with a steam-water separator (7), a low temperature superheater
(3), a high temperature superheater (4) and steam turbine high-pressure cylinder (15) connection, and connect the high temperature superheater (4) with it is described
Once main steam valve (9) are set on a main steam line (31) between steam turbine high-pressure cylinder (15)；The steam turbine is high
Cylinder pressure (15) is connected by cold single reheat jet chimney (11) with single reheat device (2) entrance, and it is described it is cold it is primary again
Single reheat cold end shut-off valve (34) is provided in vapours pipeline (11)；Single reheat device (2) outlet is primary by heat
Reheaing steam pipe (12) is connected with Steam Turbine Through IP Admission (16), is arranged once on the hot single reheat jet chimney (12)
Reheating hot junction shut-off valve (35)；The water wall structure of the secondary boiler furnace (25) by steam-water pipeline successively with secondary carbonated drink
Separator (27), secondary low temperature superheater (23), secondary high-temperature superheater (24) are connected with steam turbine high-pressure cylinder (15), and connect
It is provided on secondary main steam line (32) between the secondary high-temperature superheater (24) and the steam turbine high-pressure cylinder (15)
Secondary main steam valve (29)；The Steam Turbine Through IP Admission (16) passes through cold double reheat jet chimney (13) and the double reheat
Device (22) entrance is connected, and is provided with double reheat cold end shut-off valve (37) on the cold double reheat jet chimney (13)；Institute
It states secondary reheater (22) outlet by hot double reheat jet chimney (14) to be connected with turbine low pressure cylinder (17), and the heat
Double reheat hot junction shut-off valve (38) is provided on double reheat jet chimney (14).
2. a kind of double reheat electricity generation system according to claim 1, it is characterised in that：It is from high to low by flue-gas temperature
Tandem, a high temperature superheater (4), a low temperature superheater (3), an economizer (1) cloth successively from front to back
Set, the single reheat device (2) setting before a low temperature superheater (3) or with a low temperature superheater (3)
It is set up in parallel；The secondary high-temperature superheater (24), secondary low temperature superheater (23), secondary economizer (21) are from front to back successively
Arrangement, the secondary reheater (22) setting before the secondary low temperature superheater (23) or with the secondary low temperature superheater
(23) it is arranged in juxtaposition.
3. a kind of double reheat electricity generation system according to claim 1, it is characterised in that：The single reheat device (2) goes out
Mouthful be also connected with the steam turbine high-pressure cylinder (15) by hot single reheat jet chimney (12), and with the steam turbine high-pressure cylinder
(15) single reheat steam short valve (33) is provided on connecting line；The hot single reheat jet chimney (12) and the vapour
Connecting line between turbine high pressure cylinder (15) and the Steam Turbine Through IP Admission (16) is parallel connection；The secondary reheater (22) goes out
Mouthful be connected with the Steam Turbine Through IP Admission (16) by hot double reheat jet chimney (14), and with the Steam Turbine Through IP Admission
(16) double reheat steam short valve (36) is provided on connecting line；The hot double reheat jet chimney (14) and the vapour
Connecting line between turbine intermediate pressure cylinder (16) and low pressure (LP) cylinder (17) described steam turbine is parallel connection.
4. a kind of double reheat electricity generation system according to claim 1, it is characterised in that：The flue of boiler is set
It is equipped with a twin flue partition wall (10), secondary twin flue partition wall (30) is provided in the flue of the secondary boiler, it is described primary
Twin flue partition wall (10), secondary twin flue partition wall (30) are arranged in parallel with flue gas flow direction so that single flue be spaced for flue gas
Flow to the parallel parallel twin flue being set up in parallel.
5. a kind of double reheat electricity generation system according to claim 1, it is characterised in that：Boiler selects coal dust
Stove or circulating fluidized bed boiler；The secondary boiler selects coal-powder boiler or circulating fluidized bed boiler.
6. a kind of double reheat electricity generation system according to claim 5, it is characterised in that：Boiler and/or two
When secondary boiler selects circulating fluidized bed boiler, a boiler further includes a cyclone separator (61) and is arranged described one
A returning charge valve (62) below secondary cyclone separator (61)；The secondary boiler further includes secondary cyclone separator (64) and sets
Set the secondary returning charge valve (65) below the secondary cyclone separator (64).
7. a kind of double reheat electricity generation system according to claim 6, it is characterised in that：Boiler and/or two
When secondary boiler selects circulating fluidized bed boiler, a boiler further includes setting below a cyclone separator (61)
A heat exchange bed (69) and a flow divider (71) at the top of a returning charge valve (62) is set；Hyperthermia and superheating
Device (4) setting is in a heat exchange bed (69), and single reheat device (2) setting is more than two, and one of which is primary
Reheater is arranged in a heat exchange bed (69)；The secondary boiler further includes being arranged in the secondary cyclone separator (64)
The secondary heat exchange bed (70) of lower section and the second diffluence valve (72) being arranged at the top of secondary returning charge valve (65)；The secondary high-temperature
Superheater (24) setting is in the secondary heat exchange bed (70), and secondary reheater (22) setting is more than two, and wherein one
Group secondary reheater is arranged in the secondary heat exchange bed (70).
8. a kind of double reheat operation of electric power system method uses a kind of double reheat power generation system as described in claim 1
System, it is characterised in that：This method includes
After boiler feedwater is pressurizeed via feed pump (20), so that a part of boiler feedwater is flowed through a main feed water pipe road (39) and enter
Economizer (1) of boiler is introduced into boiler furnace (5) water-cooling wall knot after an economizer (1) is heated
In structure, rises in boiler furnace (5) water wall structure and be heated as steam water interface and enter a steam-water separator
(7)；No. one time steam-water separator (7) is used as channel so that vapor is introduced into a low temperature superheater (3) and a high temperature successively
Superheater (4) heating reaches target component, is then sent to steam turbine high-pressure cylinder (15) by a main steam line (31)；
Make a part of boiler feedwater after secondary main feed water pipe road (40) enters secondary economizer (21) preheating, after preheating
Boiler feedwater, which is introduced into secondary boiler furnace (25) water wall structure after heating, to be become steam water interface and enters secondary carbonated drink point
From device (27)；Secondary steam-water separator (27) is used as steam-water channel so that vapor is introduced into secondary low temperature superheater successively
(23) and secondary high-temperature superheater (24) heating reaches target component, is then sent to steam turbine by secondary main steam line (32)
High pressure cylinder (15)；
Make in a main steam line (31) interior vapor and secondary main steam line (32) from a boiler from secondary
The vapor of boiler merges, and is sent into enters steam turbine high-pressure cylinder (15) acting together；
From its outlet discharge single reheat steam after making steam turbine high-pressure cylinder (15) do work, pass through cold single reheat jet chimney
(11) enter single reheat device (2), steamer is entered by hot single reheat jet chimney (12) after so that it is heated to rated temperature
Machine intermediate pressure cylinder (16) does work；
Double reheat steam is discharged after so that Steam Turbine Through IP Admission (16) is done work, enters two by cold double reheat jet chimney (13)
Secondary reheater (22) enters turbine low pressure cylinder after so that it is heated to rated temperature by hot double reheat jet chimney (14)
(17) expansion work drives generator (18) to generate electricity together with steam turbine high-pressure cylinder (15), Steam Turbine Through IP Admission (16)；
Turbine low pressure cylinder (17) steam discharge is condensed into water by condenser (19), then is pressurizeed by feed pump (20).
9. a kind of double reheat operation of electric power system method according to claim 8, further uses such as claim 3
A kind of double reheat electricity generation system, it is characterised in that：This method include when a boiler is out of service,
A main steam valve (9) is turned off, after so that boiler feedwater is pressurizeed via feed pump (20), by secondary main feed water pipe road
(40) after entering secondary economizer (21) preheating of secondary boiler, the boiler feedwater after preheating is introduced into secondary boiler furnace (25)
Become steam water interface after being heated in water wall structure and enters secondary steam-water separator (27)；Secondary steam-water separator (27) is made
For steam-water channel so that vapor is introduced into secondary low temperature superheater (23) successively and secondary high-temperature superheater (24) heating reaches
Then target component is sent to steam turbine high-pressure cylinder (15) acting by secondary main steam line (32)；
Single reheat cold end shut-off valve (34) and single reheat hot junction shut-off valve (35) are turned off, single reheat steam short valve is opened
(33), the single reheat steam from steam turbine high-pressure cylinder (15) outlet discharge is made to be directly entered Steam Turbine Through IP Admission (16) acting；
Double reheat steam is discharged after so that Steam Turbine Through IP Admission (16) is done work, enters two by cold double reheat jet chimney (13)
Secondary reheater (22) enters turbine low pressure cylinder after so that it is heated to rated temperature by hot double reheat jet chimney (14)
(17) expansion work drives generator (18) to generate electricity together with steam turbine high-pressure cylinder (15), Steam Turbine Through IP Admission (16)；
Turbine low pressure cylinder (17) steam discharge is condensed into water by condenser (19), then is pressurizeed by feed pump (20).
10. a kind of double reheat operation of electric power system method according to claim 8, further uses such as claim
A kind of double reheat electricity generation system described in 3, it is characterised in that：This method include when secondary boiler is out of service,
Secondary main steam valve (29) is turned off, after so that boiler feedwater is pressurizeed via feed pump (20), flows through a main feed water pipe road
(39) economizer (1) for entering a boiler is introduced into a boiler furnace (5) after an economizer (1) is heated
In water wall structure, rises in boiler furnace (5) water wall structure and be heated as steam water interface and enter a vapour
Separator (7)；Steam-water separator (7) is used as channel so that vapor be introduced into successively a low temperature superheater (3) and
High temperature superheater (4) heating reaches target component, is then sent to steam turbine high-pressure cylinder by a main steam line (31)
(15) it does work；
From its outlet discharge single reheat steam after making steam turbine high-pressure cylinder (15) do work, pass through cold single reheat jet chimney
(11) enter single reheat device (2), steamer is entered by hot single reheat jet chimney (12) after so that it is heated to rated temperature
Machine intermediate pressure cylinder (16) does work；
Double reheat cold end shut-off valve (37) and double reheat hot junction shut-off valve (38) are turned off, double reheat steam short valve is opened
(36), the double reheat steam being discharged after making Steam Turbine Through IP Admission (16) do work is directly entered turbine low pressure cylinder (17) acting；
Turbine low pressure cylinder (17) steam discharge is condensed into water by condenser (19), then is pressurizeed by feed pump (20).
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| WO2021110020A1 (en) * | 2019-12-06 | 2021-06-10 | 江苏太湖锅炉股份有限公司 | Flue gas waste heat utilization system |
| CN113280326A (en) * | 2021-06-21 | 2021-08-20 | 西安热工研究院有限公司 | System for flexibly adjusting reheated steam temperature by adapting to boiler depth peak shaving |
| CN114704817A (en) * | 2022-03-14 | 2022-07-05 | 暨南大学 | Modular boiler system and operation method thereof |
| CN114754345A (en) * | 2022-04-24 | 2022-07-15 | 西安热工研究院有限公司 | Boiler and thermal power generating unit with baffle plate assembly |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4466914B2 (en) * | 2004-02-17 | 2010-05-26 | バブコック日立株式会社 | Combined power plant and starting method |
| CN102678194A (en) * | 2011-03-18 | 2012-09-19 | 中国电力工程顾问集团华东电力设计院 | Secondary reheating steam turbine generator unit system provided with overheating steam feed water heater |
| JP2013185524A (en) * | 2012-03-09 | 2013-09-19 | Hitachi Ltd | Coal-fired power generation plant |
| CN103438440B (en) * | 2013-09-10 | 2015-09-09 | 章礼道 | Supercritical double-reheat CFBB |
| CN103925019B (en) * | 2014-04-18 | 2015-05-13 | 国电科学技术研究院 | Matching method of supercritical secondary reheating unit reheater and thermal system |
| CN205605255U (en) * | 2016-04-18 | 2016-09-28 | 陆达 | Biomass waste pot furnace assembly integrated power production system |
-
2018
- 2018-05-23 CN CN201810502043.8A patent/CN108592008B/en active Active
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| CN114704817B (en) * | 2022-03-14 | 2024-04-16 | 暨南大学 | Modularized boiler system and operation method thereof |
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