CN109798157A - A kind of solidifying pumping back coupling steam extraction integrated system and its operation method for thermoelectricity unit power peak regulation - Google Patents
A kind of solidifying pumping back coupling steam extraction integrated system and its operation method for thermoelectricity unit power peak regulation Download PDFInfo
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Abstract
The present invention relates to a kind of solidifying pumping back coupling steam extraction integrated systems and its operation method for thermoelectricity unit power peak regulation, including station boiler, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder, generator, condenser, the first reducing-and-cooling plant, pressure matching device, the second reducing-and-cooling plant, steam heat storage device and Desuperheating device, the present invention is based on cascaded utilization of energy principles, carry out the Integrated design of different steam extraction modes, the thermoelectricity decoupling service ability for effectively increasing large-scale thermoelectricity unit, has ensured extraneous heat demand；In addition, while progress steam extraction is integrated, pressure matching device and reducing-and-cooling plant are coupled, while realizing the operation of unit heat supply full working scope, the acting capacity loss for further decreasing steam realizes the cascade utilization of energy, has especially coupled novel solidifying pumping back heat supply, the utilization for effectively reducing high parameter steam has reached making full use of for steam energy.
Description
Technical field
The invention belongs to cogeneration of heat and power technical fields, and in particular to a kind of solidifying pumping back coupling for thermoelectricity unit power peak regulation
Close steam extraction integrated system and its operation method.
Background technique
Currently, China's policy gradually payes attention to the popularization of new energy, the ratio of fired power generating unit is reduced, so that the hair of fired power generating unit
Exhibition faces a severe test.Currently, to improve the comprehensive energy utilization efficiency of fired power generating unit, and strive for more gas-to electricity hours
Number, pure condensate unit change heat supply and are widely developed.But for different industrial steam users, since respective technique is different,
Required steam pressure parameter is also just not quite similar, and for thermoelectricity unit, only one externally for the main pipe road of steam,
It i.e. can only be externally for a kind of steam of pressure parameter.It thereby results in: when the pressure of the external steam supply of thermoelectricity unit is higher, for low
It presses for steam demand user, causes overbottom pressure loss；When the pressure of the external steam supply of thermoelectricity unit is lower, for high steam
For demand user, steam parameter is unable to satisfy demand.
Currently, being directed to the patented technology of industrial heating extraction regulation, mainly have: (1) pressure can in a kind of large steam turbine
It adjusts extraction steam for factories method (patent No. 201611212458.9), is that reheat control valve is changed according to extraction steam for factories amount size
Quantity and each valve throat dimension of rational design, to realize the adjusting of unit extraction steam for factories amount under different load；(2) a kind of change
Load thermal power plant heating energy-saving structure and its adjusting method (patent No. 201710247595.4), be carry out extraction steam for factories,
Cold steam extraction again, the heat different steam extraction mode such as steam extraction again it is integrated, and couple the technologies such as small steam turbine, pressure matcher, realize basis
The variation of steam extraction amount and unit output adjusts external steam supply way, to guarantee that extraction pressure meets extraneous demand.The application
Be then based on and meanwhile meet peak load regulation network requirement and innovation and creation that extraneous heat demand carries out.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide it is a kind of design rationally, performance
Reliable solidifying pumping back coupling steam extraction integrated system and its operation method for thermoelectricity unit power peak regulation.
Technical solution used by the present invention solves the above problems is: a kind of solidifying pumping back for thermoelectricity unit power peak regulation
Couple steam extraction integrated system characterized by comprising station boiler, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, steam turbine are low
Cylinder pressure, generator, condenser, the first reducing-and-cooling plant, pressure matching device, the second reducing-and-cooling plant, steam accumulation of heat dress
It sets and Desuperheating device, the steam turbine high-pressure cylinder, Steam Turbine Through IP Admission and turbine low pressure cylinder are coaxially connected, and driven generator
The feed-water inlet of power generation, boiler feed pipe and station boiler connects, the main steam mouth of the station boiler by main steam pipe with
The air intake of steam turbine high-pressure cylinder connects, and is equipped with the first regulating valve, the steam turbine in the air intake of steam turbine high-pressure cylinder
The steam drain of high pressure cylinder is connected by the cold steam port again of cold steam pipe again and station boiler, and in the steam discharge of steam turbine high-pressure cylinder
The cold steam port again of mouth and station boiler is separately installed with third regulating valve and the 4th regulating valve, and the heat of the station boiler is steamed again
By heat, steam pipe and the air intake of Steam Turbine Through IP Admission connect steam ports again, and are equipped with the in the air intake of Steam Turbine Through IP Admission
The steam drain of six regulating valves, the Steam Turbine Through IP Admission is connected by the air intake of communicating pipe and turbine low pressure cylinder, and even
Hydraulic pressure butterfly valve is installed, the steam drain of the turbine low pressure cylinder is connect with condenser, the admission end of main steam bypass on siphunculus
It is connect with main steam pipe, the steam output end of main steam bypass is connect with cold steam pipe again, and along steam stream in main steam bypass
Dynamic direction is sequentially installed with the second regulating valve, the first reducing-and-cooling plant and the first gate valve, the cold steam by-pass again into vapour
End is connect with cold steam pipe again, and the steam output end of cold steam by-pass again is connect with the steam output end of hot steam by-pass again, and is steamed again cold
5th regulating valve is installed, steam pipe is connect the admission end of steam by-pass heat again with heat again, and by heat again steam in vapour bypass
Road is equipped with the 7th regulating valve, and the extraction opening of the Steam Turbine Through IP Admission is connect by extraction steam for factories pipe with industrial steam supply pipe,
And the 8th regulating valve is installed on extraction steam for factories pipe, the low pressure admission mouth of the pressure matching device by low pressure steam pipe with
The steam drain of Steam Turbine Through IP Admission connects, and the tenth regulating valve is equipped on low pressure steam pipe, the pressure matching device
High-pressure admission mouth is connect by the first high steam branch pipe with the steam output end of cold steam by-pass again, and in the first high steam branch pipe
On the 11st regulating valve is installed, the middle extrusion steam ports of the pressure matching device is connected by middle pressure steam pipe and industrial steam supply pipe
It connects, and the 12nd regulating valve is installed on middle pressure steam pipe, the air intake of second reducing-and-cooling plant is high by second
Pressure steam branch pipe is connect with the steam output end of cold steam by-pass again, and the 13rd adjusting is equipped on the second high steam branch pipe
Valve, the venthole of second reducing-and-cooling plant are connect with industrial steam supply pipe, and in the venthole of the second reducing-and-cooling plant
14th regulating valve is installed, the high pressure steam inlet of the steam heat storage device is steamed by third high steam branch pipe with cold again
The steam output end connection of vapour bypass, and the 15th regulating valve, the steam heat storage device are installed on third high steam branch pipe
Middle pressure steam outlet connect with industrial steam supply pipe, and exported in the middle pressure steam of steam heat storage device and be equipped with the 16th and adjust
Valve, the steam drain of the Steam Turbine Through IP Admission also passes through cooling steam pipe and the air intake of turbine low pressure cylinder connects, and cold
But steam pipe is sequentially installed with the 9th regulating valve, pressure reducing valve, Desuperheating device and the second gate valve along steam flow direction.
Furthermore, the Desuperheating device can be direct-contact desuperheater, or indirect heat exchange cooler.
Furthermore, the cold steam pipe again is connect with main steam bypass and cold steam by-pass again simultaneously.
Furthermore, the heat again steam by-pass simultaneously with cold steam by-pass again, the first high steam branch pipe, second high
Pressure steam branch pipe is connected with third high steam branch pipe.
Furthermore, the pressure matching device, the second reducing-and-cooling plant and steam heat storage device are to be connected in parallel.
Furthermore, the hydraulic pressure butterfly valve is the valve without mechanical position limitation, the fluid No leakage when valve closes entirely.
The operation method of solidifying pumping back coupling steam extraction integrated system for thermoelectricity unit power peak regulation is specific as follows:
When unit is in supplying thermal condition, when unregulated power peak regulation demand, the concrete operations of external heat supply are as follows at this time:
The 8th regulating valve is opened, using the extraction steam for factories of steam turbine, directly carries out external heat supply by extraction steam for factories pipe；
Alternatively, opening the tenth regulating valve, the 11st regulating valve and the 12nd regulating valve, externally supplied using pressure matching device
Heat；
Alternatively, opening the 13rd regulating valve and the 14th regulating valve, external heat supply is carried out using the second reducing-and-cooling plant；
When unit is in supplying thermal condition, when having power peak regulation demand:
A, when unit needs to reduce externally output electric load, enter the steam flow of steam turbine acting by reduction mainly to realize
The power output of steam turbine is reduced, concrete operations are as follows:
Contract fully hydraulic pressure butterfly valve, the tenth regulating valve of standard-sized sheet, excision enter the steam of turbine low pressure cylinder acting, Steam Turbine Through IP Admission
Steam discharge all pass through low pressure steam pipe and enter pressure matching device and carry out external heat supply, do work to reduce into steam turbine
Steam flow；At this point, opening pressure reducing valve and the second gate valve, the aperture of the 9th regulating valve is adjusted, lacking for Steam Turbine Through IP Admission is utilized
Amount steam discharge is delivered to turbine low pressure cylinder after pressure and temperature reducing, cools down to turbine low pressure cylinder；
Alternatively, opening the 15th regulating valve, steam accumulation of heat is carried out using steam heat storage device, to reduce into steam turbine acting
Steam flow；
B, when unit needs to increase externally output electric load, enter the steam flow of steam turbine acting by increase mainly to realize
The power output of steam turbine is promoted, concrete operations are as follows:
The 13rd regulating valve and the 14th regulating valve are closed, the second reducing-and-cooling plant no longer puts into operation；
The tenth regulating valve, the 11st regulating valve and the 12nd regulating valve are closed, pressure matching device no longer puts into operation；It closes at this time
The 9th regulating valve and the second gate valve are closed, while no longer turbine low pressure cylinder is cooled down；
At this point, opening the 16th regulating valve, the 15th regulating valve is closed, carries out external heat supply using steam heat storage device；Simultaneously
When heating load needed for the external world is larger, the 8th regulating valve is opened using the extraction steam for factories of steam turbine and carries out external complementary heating.
In the above-mentioned operation method for the solidifying pumping back coupling steam extraction integrated system of thermoelectricity unit power peak regulation:
When unit is in supplying thermal condition, height is provided for pressure matching device, the second reducing-and-cooling plant and steam heat storage device
Press the operating procedure of steam as follows:
The 5th regulating valve is opened, the aperture of third regulating valve and the 4th regulating valve is adjusted, is made using the steam discharge of steam turbine high-pressure cylinder
For the source of high steam；
Alternatively, opening the 7th regulating valve, the aperture of the 6th regulating valve is adjusted, using the hot steam again of station boiler output as height
Press the source of steam；
Alternatively, the second regulating valve, the first gate valve and the 5th regulating valve are opened, using the main steam of station boiler output as high pressure
The source of steam.
In the above-mentioned operation method for the solidifying pumping back coupling steam extraction integrated system of thermoelectricity unit power peak regulation:
It is preferential to select when unit is pressure matching device, the second reducing-and-cooling plant and steam heat storage device provide high steam
The steam discharge using steam turbine high-pressure cylinder is selected, secondly the hot steam again of Selection utilization station boiler output, last Selection utilization power station
The main steam of boiler output；
When unit is in supplying thermal condition, the extraction steam for factories of preferential Selection utilization steam turbine directly carries out external heat supply, secondly selects
It selects and carries out external heat supply using pressure matching device, last the second reducing-and-cooling plant of Selection utilization carries out external heat supply.
In the above-mentioned operation method for the solidifying pumping back coupling steam extraction integrated system of thermoelectricity unit power peak regulation:
When unit is in supplying thermal condition, and need to reduce unit output electric load, it is low that preferential Selection utilization excision enters steam turbine
The steam of cylinder pressure acting reduces unit output electric load to realize；Secondly Selection utilization steam heat storage device carries out steam accumulation of heat,
Unit output electric load is reduced to realize；
When unit is in supplying thermal condition, and need to promote unit output electric load, the second reducing-and-cooling plant is preferentially stopped using
External heat supply is carried out, next stops using pressure matching device to carry out external heat supply；At this point, preferential Selection utilization steam accumulation of heat dress
It sets and carries out external heat supply；Secondly the extraction steam for factories of Selection utilization steam turbine carries out external heat supply.
Compared with prior art, the present invention having the following advantages that and effect: structure is simple, design rationally, reliable performance, base
In cascaded utilization of energy principle, the Integrated design of different steam extraction modes is carried out, effectively increases the thermal electrolysis of large-scale thermoelectricity unit
Coupling service ability has ensured extraneous heat demand；In addition, carry out steam extraction it is integrated while, coupled pressure matching device and
Reducing-and-cooling plant further decreases the acting capacity loss of steam while realizing the operation of unit heat supply full working scope, realizes
The cascade utilization of energy has especially coupled novel solidifying pumping back heat supply, has effectively reduced the utilization of high parameter steam, reached steaming
Vapour energy makes full use of.After the present invention, while depth excavation thermoelectricity unit external heat capacity, electric power is both met
Peak-frequency regulation requirement, and the acting capacity loss in heat supplying process is effectively reduced, especially meet current national policy requirement,
It is worth with practice higher.
Detailed description of the invention
Fig. 1 is the structure in the embodiment of the present invention for the solidifying pumping back coupling steam extraction integrated system of thermoelectricity unit power peak regulation
Schematic diagram.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
Referring to Fig. 1, the solidifying pumping back for thermoelectricity unit power peak regulation in the present embodiment couples steam extraction integrated system, packet
Include: station boiler 1, steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3, turbine low pressure cylinder 4, generator 5, condenser 6, first subtract
Warm decompressor 7, pressure matching device 8, the second reducing-and-cooling plant 9, steam heat storage device 10 and Desuperheating device 11.
Steam turbine high-pressure cylinder 2, Steam Turbine Through IP Admission 3 and turbine low pressure cylinder 4 are coaxially connected, and driven generator 5 is done work
Power generation, boiler feed pipe 21 are connect with the feed-water inlet of station boiler 1, and the main steam mouth of station boiler 1 passes through main steam pipe 22
It is connect with the air intake of steam turbine high-pressure cylinder 2, and first regulating valve 41, steamer is installed in the air intake of steam turbine high-pressure cylinder 2
The steam drain of machine high pressure cylinder 2 is connect by cold steam pipe again 24 with the cold steam port again of station boiler 1, and in steam turbine high-pressure cylinder
2 steam drain and the cold steam port again of station boiler 1 are separately installed with third regulating valve 44 and the 4th regulating valve 45, station boiler
By heat, steam pipe 26 is connect steam port 1 heat with the air intake of Steam Turbine Through IP Admission 3 again again, and in Steam Turbine Through IP Admission 3
Air intake is equipped with the 6th regulating valve 47, the steam drain of Steam Turbine Through IP Admission 3 by communicating pipe 29 and turbine low pressure cylinder 4 into
Steam ports connection, and hydraulic pressure butterfly valve 50 is installed on communicating pipe 29, the steam drain of turbine low pressure cylinder 4 is connect with condenser 6, main
The admission end of steam by-pass 23 is connect with main steam pipe 22, and the steam output end of main steam bypass 23 is connect with cold steam pipe again 24, and
The second regulating valve 42, the first reducing-and-cooling plant 7 and the are sequentially installed with along steam flow direction in main steam bypass 23
One gate valve 43, the admission end of cold steam by-pass again 25 are connect with cold steam pipe again 24, the steam output end and heat of cold steam by-pass again 25
The steam output end connection of steam by-pass 27 again, and the 5th regulating valve 46 is installed in cold steam by-pass again 25, hot steam by-pass again
Steam pipe 26 is connect 27 admission end again with heat, and the 7th regulating valve 48 is equipped in heat again steam by-pass 27, in steam turbine
The extraction opening of cylinder pressure 3 is connect by extraction steam for factories pipe 28 with industrial steam supply pipe 36, and is equipped with the 8th on extraction steam for factories pipe 28
The low pressure admission mouth of regulating valve 49, pressure matching device 8 is connected by low pressure steam pipe 31 and the steam drain of Steam Turbine Through IP Admission 3
It connects, and the tenth regulating valve 54 is installed on low pressure steam pipe 31, the high-pressure admission mouth of pressure matching device 8 passes through the first high pressure
Steam branch pipe 32 is connect with the steam output end of cold steam by-pass again 25, and the 11st tune is equipped on the first high steam branch pipe 32
Valve 55 is saved, the middle extrusion steam ports of pressure matching device 8 is connect by middle pressure steam pipe 33 with industrial steam supply pipe 36, and is steamed in middle pressure
12nd regulating valve 56 is installed, the air intake of the second reducing-and-cooling plant 9 passes through the second high steam branch pipe 34 on steam pipe 33
It is connect with the steam output end of cold steam by-pass again 25, and the 13rd regulating valve 57 is installed on the second high steam branch pipe 34, the
The venthole of two reducing-and-cooling plants 9 is connect with industrial steam supply pipe 36, and is equipped in the venthole of the second reducing-and-cooling plant 9
The high pressure steam inlet of 14th regulating valve 58, steam heat storage device 10 passes through by third high steam branch pipe 35 and cold steam again
The steam output end on road 25 connects, and the 15th regulating valve 59, steam heat storage device 10 are equipped on third high steam branch pipe 35
Middle pressure steam outlet connect with industrial steam supply pipe 36, and exported in the middle pressure steam of steam heat storage device 10 and be equipped with the 16th
Regulating valve 60, the steam drain of Steam Turbine Through IP Admission 3 also pass through cooling steam pipe 30 and connect with the air intake of turbine low pressure cylinder 4,
And the 9th regulating valve 51, pressure reducing valve 52,11 and of Desuperheating device are sequentially installed with along steam flow direction in cooling steam pipe 30
Second gate valve 53.
Desuperheating device 11 can be direct-contact desuperheater, be also possible to indirect heat exchange cooler.
Cold steam pipe again 24 is connect with the admission end of the steam output end of main steam bypass 23 and cold steam by-pass again 25 simultaneously.
Steam output end steam output end, the first high steam branch pipe with cold steam by-pass again 25 simultaneously of heat steam by-pass 27 again
32, the second high steam branch pipe 34 and third high steam branch pipe 35 connect.
Pressure matching device 8, the second reducing-and-cooling plant 9 and steam heat storage device 10 are to be connected in parallel.
Hydraulic pressure butterfly valve 50 is the valve without mechanical position limitation, the fluid No leakage when valve closes entirely.
In the present embodiment, the operation method of the solidifying pumping back coupling steam extraction integrated system for thermoelectricity unit power peak regulation is specific
It is as follows:
When unit is in supplying thermal condition, when unregulated power peak regulation demand, the concrete operations of external heat supply are as follows at this time:
The 8th regulating valve 49 is opened, using the extraction steam for factories of steam turbine, directly carries out external heat supply by extraction steam for factories pipe 28；
Or the tenth regulating valve 54, the 11st regulating valve 55 and the 12nd regulating valve 56 are opened, it is carried out using pressure matching device 8
External heat supply；
Or the 13rd regulating valve 57 and the 14th regulating valve 58 are opened, external heat supply is carried out using the second reducing-and-cooling plant 9；
When unit is in supplying thermal condition, when having power peak regulation demand:
A, when unit needs to reduce externally output electric load, enter the steam flow of steam turbine acting by reduction mainly to realize
The power output of steam turbine is reduced, concrete operations are as follows:
Contract fully hydraulic pressure butterfly valve 50, the tenth regulating valve 54 of standard-sized sheet, excision enter the steam that turbine low pressure cylinder 4 does work, steam turbine
The steam discharge of intermediate pressure cylinder 3 all passes through low pressure steam pipe 31 and carries out external heat supply into pressure matching device 8, to reduce into vapour
The steam flow of turbine acting；At this point, opening pressure reducing valve 52 and the second gate valve 53, the aperture of the 9th regulating valve 51 is adjusted, is utilized
A small amount of steam discharge of Steam Turbine Through IP Admission 3 is delivered to turbine low pressure cylinder 4 after pressure and temperature reducing, carries out to turbine low pressure cylinder 4
It is cooling；
Or the 15th regulating valve 59 is opened, steam accumulation of heat is carried out using steam heat storage device 10, is done to reduce into steam turbine
The steam flow of function；
B, when unit needs to increase externally output electric load, enter the steam flow of steam turbine acting by increase mainly to realize
The power output of steam turbine is promoted, concrete operations are as follows:
The 13rd regulating valve 57 and the 14th regulating valve 58 are closed, the second reducing-and-cooling plant 9 no longer puts into operation；
The tenth regulating valve 54, the 11st regulating valve 55 and the 12nd regulating valve 56 are closed, pressure matching device 8 no longer puts into fortune
Row；The 9th regulating valve 51 and the second gate valve 53 are closed at this time, while no longer turbine low pressure cylinder 4 is cooled down；
At this point, opening the 16th regulating valve 60, the 15th regulating valve 59 is closed, is externally supplied using steam heat storage device 10
Heat；Simultaneously when heating load needed for the external world is larger, the 8th regulating valve 49 is opened, using the extraction steam for factories of steam turbine, is carried out external
Complementary heating.
In the carrying out practically method of the present embodiment:
When unit is in supplying thermal condition, mentioned for pressure matching device 8, the second reducing-and-cooling plant 9 and steam heat storage device 10
It is as follows for the operating procedure of high steam:
The 5th regulating valve 46 is opened, the aperture of third regulating valve 44 and the 4th regulating valve 45 is adjusted, utilizes steam turbine high-pressure cylinder 2
Source of the steam discharge as high steam；
Or the 7th regulating valve 48 is opened, the aperture of the 6th regulating valve 47 is adjusted, the heat exported using station boiler 1 again make by steam
For the source of high steam；
Or the second regulating valve 42, the first gate valve 43 and the 5th regulating valve 46 are opened, made using the main steam that station boiler 1 exports
For the source of high steam.
In the carrying out practically method of the present embodiment:
It is excellent when unit is that pressure matching device 8, the second reducing-and-cooling plant 9 and steam heat storage device 10 provide high steam
The steam discharge of first Selection utilization steam turbine high-pressure cylinder 2, the hot steam again that secondly Selection utilization station boiler 1 exports, finally selection is sharp
The main steam exported with station boiler 1；
When unit is in supplying thermal condition, the extraction steam for factories of preferential Selection utilization steam turbine directly carries out external heat supply, secondly selects
It selects and carries out external heat supply using pressure matching device 8, last the second reducing-and-cooling plant of Selection utilization 9 carries out external heat supply.
In the carrying out practically method of the present embodiment:
When unit is in supplying thermal condition, and need to reduce unit output electric load, it is low that preferential Selection utilization excision enters steam turbine
The steam that cylinder pressure 4 does work reduces unit output electric load to realize；Secondly Selection utilization steam heat storage device 10 carries out steam storage
Heat reduces unit output electric load to realize；
When unit is in supplying thermal condition, and need to promote unit output electric load, the second reducing-and-cooling plant 9 is preferentially stopped using
External heat supply is carried out, next stops using pressure matching device 8 to carry out external heat supply；At this point, preferential Selection utilization steam accumulation of heat
Device 10 carries out external heat supply；Secondly the extraction steam for factories of Selection utilization steam turbine carries out external heat supply.
In the carrying out practically method of the present embodiment, all valves all have the function of adjusting pipeline fluid flow.
In the carrying out practically method of the present embodiment, in the operation of different operating conditions, the valvular aperture regulation of institute passes through heat
The DCS control system of motor group, which remotely operates, to be completed；The storage emission capacity and storage Exotherm Time of steam heat storage device 10 need simultaneously
Consider the requirement of power peak regulation frequency modulation, the composite factors such as the external heat capacity of unit and unit steam extraction integrated system regulating power
To determine.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this hair
Bright protection scope.
Claims (10)
1. a kind of solidifying pumping back coupling steam extraction integrated system for thermoelectricity unit power peak regulation characterized by comprising power station pot
Furnace (1), steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3), turbine low pressure cylinder (4), generator (5), condenser (6),
One reducing-and-cooling plant (7), pressure matching device (8), the second reducing-and-cooling plant (9), steam heat storage device (10) and desuperheat
Device (11), the steam turbine high-pressure cylinder (2), Steam Turbine Through IP Admission (3) and turbine low pressure cylinder (4) are coaxially connected, and drive
Generator (5) power generation, boiler feed pipe (21) are connect with the feed-water inlet of station boiler (1), the main steaming of the station boiler (1)
Steam ports is connect by main steam pipe (22) with the air intake of steam turbine high-pressure cylinder (2), and the air intake in steam turbine high-pressure cylinder (2)
It is equipped with the first regulating valve (41), the steam drain of the steam turbine high-pressure cylinder (2) passes through cold steam pipe again (24) and station boiler
(1) cold steam port again connection, and distinguish in the cold steam port again of the steam drain of steam turbine high-pressure cylinder (2) and station boiler (1)
Third regulating valve (44) and the 4th regulating valve (45) are installed, steam port passes through hot steam again to the heat of the station boiler (1) again
Pipe (26) is connect with the air intake of Steam Turbine Through IP Admission (3), and is equipped with the 6th adjusting in the air intake of Steam Turbine Through IP Admission (3)
The steam drain of valve (47), the Steam Turbine Through IP Admission (3) is connected by the air intake of communicating pipe (29) and turbine low pressure cylinder (4)
It connects, and hydraulic pressure butterfly valve (50) is installed on communicating pipe (29), the steam drain of the turbine low pressure cylinder (4) and condenser (6)
The admission end of connection, main steam bypass (23) is connect with main steam pipe (22), the main steam bypass the steam output end of (23) with it is cold
Steam pipe (24) connects again, and is sequentially installed with the second regulating valve along steam flow direction in main steam bypass (23)
(42), the first reducing-and-cooling plant (7) and the first gate valve (43), the admission end and cold steam again of the cold steam by-pass again (25)
(24) connection is managed, the steam output end of cold steam by-pass again (25) is connect with the steam output end of hot steam by-pass (27) again, and is steamed again cold
5th regulating valve (46), the hot admission end of steam by-pass (27) again and hot steam pipe (26) again are installed in vapour bypass (25)
Connection, and the 7th regulating valve (48) is installed in heat again steam by-pass (27), the extraction opening of the Steam Turbine Through IP Admission (3) is logical
It crosses extraction steam for factories pipe (28) to connect with industrial steam supply pipe (36), and the 8th regulating valve is installed on extraction steam for factories pipe (28)
(49), the low pressure admission mouth of the pressure matching device (8) passes through the steam discharge of low pressure steam pipe (31) and Steam Turbine Through IP Admission (3)
Mouth connection, and the tenth regulating valve (54) is installed on low pressure steam pipe (31), the high-pressure admission of the pressure matching device (8)
Mouth is connect by the first high steam branch pipe (32) with the steam output end of cold steam by-pass again (25), and in the first high steam branch pipe
(32) the 11st regulating valve (55) is installed, the middle extrusion steam ports of the pressure matching device (8) passes through middle pressure steam pipe on
(33) it is connect with industrial steam supply pipe (36), and the 12nd regulating valve (56) is installed on middle pressure steam pipe (33), described second
The air intake of reducing-and-cooling plant (9) is connected by the second high steam branch pipe (34) and the steam output end of cold steam by-pass again (25)
It connects, and the 13rd regulating valve (57) is installed on the second high steam branch pipe (34), second reducing-and-cooling plant (9)
Venthole is connect with industrial steam supply pipe (36), and is equipped with the 14th regulating valve in the venthole of the second reducing-and-cooling plant (9)
(58), the high pressure steam inlet of the steam heat storage device (10) passes through third high steam branch pipe (35) and cold steam by-pass again
(25) steam output end connection, and the 15th regulating valve (59) is installed on third high steam branch pipe (35), the steam stores
The middle pressure steam outlet of thermal (10) is connect with industrial steam supply pipe (36), and is gone out in the middle pressure steam of steam heat storage device (10)
Mouth is equipped with the 16th regulating valve (60), and the steam drain of the Steam Turbine Through IP Admission (3) also passes through cooling steam pipe (30) and vapour
The air intake of turbine low pressure (LP) cylinder (4) connects, and is sequentially installed with the 9th tune along steam flow direction in cooling steam pipe (30)
Save valve (51), pressure reducing valve (52), Desuperheating device (11) and the second gate valve (53).
2. the solidifying pumping back coupling steam extraction integrated system according to claim 1 for thermoelectricity unit power peak regulation, feature
It is, the Desuperheating device (11) is direct-contact desuperheater, or is indirect heat exchange cooler.
3. the solidifying pumping back coupling steam extraction integrated system according to claim 1 for thermoelectricity unit power peak regulation, feature
It is, the cold steam pipe again (24) connect with main steam bypass (23) He Lengzai steam by-pass (25) simultaneously.
4. the solidifying pumping back coupling steam extraction integrated system according to claim 1 for thermoelectricity unit power peak regulation, feature
Be, it is described heat again steam by-pass (27) simultaneously with cold steam by-pass again (25), the first high steam branch pipe (32), the second high pressure
Steam branch pipe (34) and third high steam branch pipe (35) connection.
5. the solidifying pumping back coupling steam extraction integrated system according to claim 1 for thermoelectricity unit power peak regulation, feature
It is, the pressure matching device (8), the second reducing-and-cooling plant (9) and steam heat storage device (10) are to be connected in parallel.
6. the solidifying pumping back coupling steam extraction integrated system according to claim 1 for thermoelectricity unit power peak regulation, feature
It is, the hydraulic pressure butterfly valve (50) is the valve without mechanical position limitation, the fluid No leakage when valve closes entirely.
7. a kind of such as the solidifying pumping back coupling steam extraction collection described in any one of claims 1 to 6 for thermoelectricity unit power peak regulation
At the operation method of system, which is characterized in that the operation method is as follows:
When unit is in supplying thermal condition, when unregulated power peak regulation demand, the concrete operations of external heat supply are as follows at this time:
The 8th regulating valve (49) is opened, using the extraction steam for factories of steam turbine, is directly externally supplied by extraction steam for factories pipe (28)
Heat；
Alternatively, opening the tenth regulating valve (54), the 11st regulating valve (55) and the 12nd regulating valve (56), filled using pressure match
It sets (8) and carries out external heat supply；
Alternatively, open the 13rd regulating valve (57) and the 14th regulating valve (58), carried out pair using the second reducing-and-cooling plant (9)
Outer heat supply；
When unit is in supplying thermal condition, when having power peak regulation demand:
A, when unit needs to reduce externally output electric load, enter the steam flow of steam turbine acting by reduction mainly to realize
The power output of steam turbine is reduced, concrete operations are as follows:
Contract fully hydraulic pressure butterfly valve (50), the tenth regulating valve (54) of standard-sized sheet, excision enter the steam of turbine low pressure cylinder (4) acting,
The steam discharge of Steam Turbine Through IP Admission (3) all passes through low pressure steam pipe (31) and carries out external heat supply into pressure matching device (8), from
And reduce the steam flow for entering steam turbine acting；At this point, opening pressure reducing valve (52) and the second gate valve (53), adjusts the 9th and adjust
The aperture of valve (51) is delivered to turbine low pressure cylinder using a small amount of steam discharge of Steam Turbine Through IP Admission (3) after pressure and temperature reducing
(4), turbine low pressure cylinder (4) is cooled down；
Alternatively, opening the 15th regulating valve (59), steam accumulation of heat is carried out using steam heat storage device (10), to reduce into steamer
The steam flow of machine acting；
B, when unit needs to increase externally output electric load, enter the steam flow of steam turbine acting by increase mainly to realize
The power output of steam turbine is promoted, concrete operations are as follows:
The 13rd regulating valve (57) and the 14th regulating valve (58) are closed, the second reducing-and-cooling plant (9) no longer puts into operation；
The tenth regulating valve (54), the 11st regulating valve (55) and the 12nd regulating valve (56) are closed, pressure matching device (8) is no longer
It puts into operation；The 9th regulating valve (51) and the second gate valve (53) are closed at this time, while no longer turbine low pressure cylinder (4) are carried out cold
But；
At this point, opening the 16th regulating valve (60), the 15th regulating valve (59) is closed, is carried out pair using steam heat storage device (10)
Outer heat supply；Simultaneously when heating load needed for the external world is larger, the 8th regulating valve (49) is opened, using the extraction steam for factories of steam turbine, into
The external complementary heating of row.
8. the operation side of the solidifying pumping back coupling steam extraction integrated system according to claim 7 for thermoelectricity unit power peak regulation
Method, it is characterised in that:
It is pressure matching device (8), the second reducing-and-cooling plant (9) and steam heat storage device when unit is in supplying thermal condition
(10) operating procedure for providing high steam is as follows:
The 5th regulating valve (46) is opened, the aperture of third regulating valve (44) and the 4th regulating valve (45) is adjusted, utilizes steam turbine height
Source of the steam discharge of cylinder pressure (2) as high steam；
Alternatively, opening the 7th regulating valve (48), the aperture of the 6th regulating valve (47) is adjusted, the heat exported using station boiler (1)
Source of the steam as high steam again；
Alternatively, opening the second regulating valve (42), the first gate valve (43) and the 5th regulating valve (46), exported using station boiler (1)
Source of the main steam as high steam.
9. the operation side of the solidifying pumping back coupling steam extraction integrated system according to claim 8 for thermoelectricity unit power peak regulation
Method, it is characterised in that:
When unit is pressure matching device (8), the second reducing-and-cooling plant (9) and steam heat storage device (10) provide high steam
When, the steam discharge of preferential Selection utilization steam turbine high-pressure cylinder (2), the hot steam again that secondly Selection utilization station boiler (1) exports, most
The main steam of Selection utilization station boiler (1) output afterwards；
When unit is in supplying thermal condition, the extraction steam for factories of preferential Selection utilization steam turbine directly carries out external heat supply, secondly selects
It selects and carries out external heat supply using pressure matching device (8), last the second reducing-and-cooling plant of Selection utilization (9) is externally supplied
Heat.
10. the operation of the solidifying pumping back coupling steam extraction integrated system according to claim 9 for thermoelectricity unit power peak regulation
Method, it is characterised in that:
When unit is in supplying thermal condition, and need to reduce unit output electric load, it is low that preferential Selection utilization excision enters steam turbine
The steam of cylinder pressure (4) acting reduces unit output electric load to realize；Secondly Selection utilization steam heat storage device (10) is steamed
Vapour accumulation of heat reduces unit output electric load to realize；
When unit is in supplying thermal condition, and need to promote unit output electric load, the second reducing-and-cooling plant is preferentially stopped using
(9) external heat supply is carried out, next stops using pressure matching device (8) to carry out external heat supply；At this point, preferential Selection utilization steam
Regenerative apparatus (10) carries out external heat supply；Secondly the extraction steam for factories of Selection utilization steam turbine carries out external heat supply.
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| CN113339774A (en) * | 2021-04-29 | 2021-09-03 | 华电电力科学研究院有限公司 | Multi-energy combined supply system based on steam gradient utilization of thermoelectric unit and adjusting method |
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| CN113339089B (en) * | 2021-06-10 | 2022-10-21 | 华电电力科学研究院有限公司 | Efficient peak regulation steam turbine system and working method thereof |
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| CN114922708A (en) * | 2022-05-13 | 2022-08-19 | 华电电力科学研究院有限公司 | Operation stopping method based on supercritical reheating type double-extraction heat supply backpressure unit system |
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| CN115217560B (en) * | 2022-07-08 | 2023-10-20 | 西安热工研究院有限公司 | Auxiliary peak shaving system and method for heat supply network |
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