CN109869786A

CN109869786A - A kind of extraction for heat supply integrated system and its operation method for combined cycle unit power peak regulation

Info

Publication number: CN109869786A
Application number: CN201910108083.9A
Authority: CN
Inventors: 郑立军; 常浩; 高新勇; 徐海鹏; 何晓红; 李成磊; 俞聪; 李国司; 王伟; 洪纯珩; 吴畅; 夏明�
Original assignee: Huadian Electric Power Research Institute Co Ltd
Current assignee: Huadian Electric Power Research Institute Co Ltd
Priority date: 2019-02-02
Filing date: 2019-02-02
Publication date: 2019-06-11
Anticipated expiration: 2039-02-02
Also published as: CN109869786B

Abstract

The present invention relates to a kind of extraction for heat supply integrated systems and its operation method for combined cycle unit power peak regulation, including gas turbine group and vapor wheel unit, based on cascaded utilization of energy principle, carry out the Integrated design of different steam extraction modes, combined cycle unit thermoelectricity decoupling service ability is effectively increased, has ensured resident's heating demand；In addition, coupling hot water hold over system simultaneously also in heating system and the feed water system of boiler, cooperate with matching of the combined cycle unit power peak regulation with heat supply has not only been realized, but also increase power peak regulation ability of the combined cycle unit when pure condensate operating condition is run.After having used the present invention, while depth excavation combined cycle unit external heat capacity, the acting capacity loss in heat supplying process is effectively reduced.The power peak regulation Policy Demand for especially meeting current rigorous realizes the depth peak modulation capacity of fired power generating unit, meets demand of the power grid to peak load regulation conscientiously, is worth with practice higher.

Description

A kind of extraction for heat supply integrated system and its fortune for combined cycle unit power peak regulation Row method

Technical field

The invention belongs to cogeneration of heat and power technical fields, and in particular to a kind of steam extraction for combined cycle unit power peak regulation Heat supply 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, depth excavate the heat capacity of fired power generating unit, increasingly obtain the attention of various circles of society.Gas cogeneration is a kind of heat The energy utilization type that energy, electric energy produce simultaneously, high-grade thermal energy is used to generate electricity by it, and low-grade thermal energy is used for heat supply, Not only the utilization efficiency of the energy had been improved, but also has reduced environmental pollution, had been had in terms of energy-saving and reduce disposal of pollutants very big Application value.

Currently, the main problems faced of gas cogeneration central heating system is that hotspot stress is relatively low, conventional combustion gas thermoelectricity Thermoelectricity ratio caused by coproduction combination, which has, centainly limits to, and advanced, high conversion efficiency unit, hotspot stress is got over Small, by taking 100,000 kW units as an example, hotspot stress is 0.7 or so.Under the severe situation for especially facing Present Thermal Power depth peak regulation, Unit is often run with running on the lower load, and the external heat capacity of unit is lower at this time, thus causes serious shadow to for thermal safety It rings.However, the prior art such as patent " a kind of cogeneration system of combined cycle (patent No. 201310401252.0) ", is benefit With external heat supply after height row's steam extraction pressure and temperature reducing, which is: (1) not considering that the cascade utilization of energy, direct desuperheat subtract The acting capacity loss of pressure is larger；(2) thermoelectricity depth peak regulation needs are not considered, and to meet extraneous heat supply, unit need to be with high load capacity Operation, peak load regulation ability are poor.

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 The reliable extraction for heat supply integrated system and its operation method for being used for combined cycle unit power peak regulation.

Technical solution used by the present invention solves the above problems is: a kind of pumping for combined cycle unit power peak regulation Vapour heat supply integrated system characterized by comprising gas turbine group and vapor wheel unit；

The gas turbine group includes gas turbine blower, gas-turbine combustion chamber, gas turbine turbine and the first generator, The exhaust outlet of the gas turbine blower and the air inlet of gas-turbine combustion chamber connect, the row of the gas-turbine combustion chamber Port is connect with the air inlet of gas turbine turbine, and the exhaust outlet of the gas turbine turbine passes through smoke discharge pipe and waste heat pot The gas inlet of furnace connects, and the gas turbine turbine drives the first electrical power generators, and gas turbine turbine and gas turbine Compressor is coaxially connected；

The vapor wheel unit includes waste heat boiler, steam turbine high-pressure cylinder, Steam Turbine Through IP Admission, turbine low pressure cylinder, the second hair Motor, condenser, condensate pump, hot water heat exchanger, gland heater, oxygen-eliminating device, the first reducing-and-cooling plant, the second desuperheat subtract Pressure device, third reducing-and-cooling plant, work device, power-equipment, heat exchangers for district heating, hydrophobic heat exchanger, pumps for hot water supply net, One circulating pump, hot water heat accumulator, second circulation pump and radiator, the steam turbine high-pressure cylinder, Steam Turbine Through IP Admission and steam turbine Low pressure (LP) cylinder is coaxially connected, and drives the second electrical power generators, and the waste heat boiler includes smoke-gas preheater, low-pressure drum, low pressure Superheater, HP steam drum, reheater and high-pressure superheater, the water inlet with low-pressure drum simultaneously of the water outlet of the smoke-gas preheater Mouth is connected with the water inlet of HP steam drum, and the venthole of the low-pressure drum and the air intake of low-pressure superheater connect, the height The air intake of the venthole and high-pressure superheater of pressing drum connects, and the air intake of the steam turbine high-pressure cylinder passes through high-pressure steam pipe It is connect with the venthole of high-pressure superheater, and No.1 valve is installed in the air intake of steam turbine high-pressure cylinder, the steam turbine is high The steam drain of cylinder pressure is connected by the air intake of cold steam pipe again and reheater, and is equipped with No. four valves in the air intake of reheater Door, by heat, steam pipe and the air intake of Steam Turbine Through IP Admission connect the venthole of the reheater again, and press in steam turbine The air intake of cylinder is equipped with No. six valves, the steam drain of the Steam Turbine Through IP Admission by communicating pipe and turbine low pressure cylinder into Steam ports connection, and hydraulic pressure butterfly valve, one end of the communicating pipe and low pressure steam pipe are installed in the air intake of turbine low pressure cylinder Connection, and ten No. four valves, the venthole and low pressure steam pipe of the low-pressure superheater are installed in one end of low pressure steam pipe Other end connection, and ten No. five valves, the steam drain of the turbine low pressure cylinder are installed in the other end of low pressure steam pipe It is connect with condenser, the water inlet end of boiler feed pipe is connect with condenser, the water outlet of the boiler feed pipe and smoke pre-heating The water inlet of device connects, and is sequentially installed with condensate pump, hot water heat exchanger, axis along water flowing direction on boiler feed pipe Heater and oxygen-eliminating device are sealed, the admission end of high steam bypass is connect with high-pressure steam pipe, and the high steam bypass goes out vapour End is connect with the admission end of the first middle pressure steam branch pipe, and is sequentially installed in high steam bypass along steam flow direction No. two valves, the first reducing-and-cooling plant and No. three valves, steam output end and the third desuperheat of the first middle pressure steam branch pipe subtract The air intake of pressure device connects, and No. nine valves are equipped on the first middle pressure steam branch pipe, the admission end of cold steam by-pass again It being connect with cold steam pipe again, the steam output end of the cold steam by-pass again is connect with the admission end of the first middle pressure steam branch pipe, and No. five valves are installed, steam pipe is connect the admission end of steam by-pass heat again with heat again, and the heat is steamed again in cold steam by-pass again The steam output end of vapour bypass is connect with the admission end of the first middle pressure steam branch pipe, and along steam flowing side in heat again steam by-pass To No. seven valves, the second reducing-and-cooling plant and No. eight valves are sequentially installed with, the admission end and low pressure of low-pressure steam bypass steam The steam output end of steam pipe connection, the low-pressure steam bypass is connect with the admission end of heating extraction steam pipe, and in low-pressure steam bypass Ten No. three valves are installed, the steam output end of the heating extraction steam pipe and the air intake of heat exchangers for district heating connect, and in heating steam extraction Ten No. seven valves are installed on pipe, the venthole of the third reducing-and-cooling plant is connect with the admission end of heating extraction steam pipe, and No. ten valves are installed in the venthole of third reducing-and-cooling plant, presses and steams in the admission end and first of the second middle pressure steam branch pipe The admission end of vapour branch pipe connects, and ride on Bus No. 11 valve is equipped on the second middle pressure steam branch pipe, the second middle pressure steam branch The steam output end of pipe and the air intake of work device connect, and the venthole of work device is connect with the admission end of heating extraction steam pipe, and Ten No. two valves, the hydrophobic outlet of the heat exchangers for district heating and the high temperature of hydrophobic heat exchanger are installed in the venthole of work device Hydrophobic import connection, the hydrophobic outlet of the low temperature of hydrophobic heat exchanger is connected by the water inlet of drain pipe and condensate pump, and is being dredged Ten No. eight valves are installed, the water at low temperature side-entrance of heat supply network return pipe and hydrophobic heat exchanger connects, and in hydrophobic heat exchange on water pipe The water at low temperature side-entrance of device is equipped with 30 No. four valves, and ten No. nine valves and heat supply network circulation are equipped on heat supply network return pipe The water side-entrance of pump, the water at low temperature side outlet and heat exchangers for district heating of the hydrophobic heat exchanger connects, and the water side of heat exchangers for district heating goes out Mouth is connect with heat supply network water supplying pipe, and is separately installed with 30 No. five valves on the water side outlet and heat supply network water supplying pipe of heat exchangers for district heating Door and two No. ten valves, the Single port of the hot water heat accumulator while one end with accumulation of heat low temperature water pipe and the first accumulation of heat low temperature branch One end of pipe connects, and the another port of hot water heat accumulator is connect with one end of accumulation of heat high-temperature conduit, the accumulation of heat low temperature water pipe The water at low temperature side-entrance of the other end and hydrophobic heat exchanger connects, and first circulation pump is equipped on accumulation of heat low temperature water pipe, described First circulation pump is provided with the bypass of accumulation of heat low temperature, and pacifies respectively in import, outlet and accumulation of heat the low temperature bypass of first circulation pump Equipped with 20 No. three valves, 20 No. two valves and two ride on Bus No. 11 valves, the other end and heat of the first accumulation of heat low temperature branch pipe The high-temperature water side outlet of water- to-water heat exchanger connects, and is equipped with 20 No. seven valves, the accumulation of heat on the first accumulation of heat low temperature branch pipe The other end of high-temperature conduit is connect with heat supply network water supplying pipe, and second circulation pump is equipped on accumulation of heat high-temperature conduit, and described second Circulating pump is provided with the bypass of accumulation of heat high temperature, and is separately installed in import, outlet and accumulation of heat the high temperature bypass of second circulation pump 20 No. four valves, 20 No. five valves and 20 No. six valves, the outlet of second circulation pump also with the first accumulation of heat high temperature One end of branch pipe connects, and the high-temperature water side-entrance of the other end and hot water heat exchanger of the first accumulation of heat high temperature branch pipe connects, and the 20 No. eight valves are installed on one accumulation of heat high temperature branch pipe.

Furthermore, the oxygen-eliminating device is subtracted with the steam output end of low-pressure steam bypass, third simultaneously by deoxygenation extraction steam pipe The venthole of warm decompressor, the venthole of work device connect with heating extraction steam pipe, and are equipped with ten on deoxygenation extraction steam pipe No. six valves.

Furthermore, the work device driving power-equipment does work, and work device is that back pressure machine or screw rod are swollen Swollen machine, power-equipment are the equipment such as generator, condensate pump, pumps for hot water supply net, first circulation pump and second circulation pump.

Furthermore, the third reducing-and-cooling plant is connected in parallel with work device, while being oxygen-eliminating device and heat Steam required for net heater provides.

Furthermore, the admission end of the second middle pressure steam branch pipe simultaneously also with high steam bypass steam output end, The steam output end of cold steam by-pass again is connected with the steam output end of hot steam by-pass again.

Furthermore, the water at low temperature side of the hot water heat exchanger is provided with feed pipe bypass, and in hot water heat exchanger 20 No. nine valves, three No. ten valves and three are separately installed in water at low temperature side-entrance, water at low temperature side outlet and feed pipe bypass Ride on Bus No. 11 valve.

Furthermore, one end of the hot water heat accumulator is also connect with one end of the second accumulation of heat low temperature branch pipe, and second stores The other end of hot low temperature branch pipe and the water outlet of radiator connect, and are equipped with 30 No. three valves on the second accumulation of heat low temperature branch pipe Door；The outlet of second circulation pump is also connect with one end of the second accumulation of heat high temperature branch pipe, the second accumulation of heat high temperature branch pipe it is another End is connect with the water inlet of radiator, and is equipped with 30 No. two valves on the second accumulation of heat high temperature branch pipe.

The operation method of the above-mentioned extraction for heat supply integrated system for combined cycle unit power peak regulation is as follows:

When unit is in pure condensate operating condition, when unregulated power peak regulation demand, operate as follows:

Only open No.1 valve, No. four valves, No. six valves, ten No. three valves, hydraulic pressure butterfly valve, ten No. four valves, ten No. five valves Door, ten No. six valves and three ride on Bus No. 11 valves, combined cycle unit does not carry out heat supply externally, and the deoxygenation steam of oxygen-eliminating device comes from In the low pressure filling of low-pressure superheater or the steam discharge of Steam Turbine Through IP Admission；

When unit is in pure condensate operating condition, when having power peak regulation demand:

A, when unit needs to reduce externally output electric load, then the steam stream of steam turbine acting is lowered by steam extraction accumulation of heat Amount carries out accumulation of heat by hot water heat accumulator at this time, operates as follows:

Ten No. three valves and ten No. seven valves are opened, the low pressure filling or Steam Turbine Through IP Admission from low-pressure superheater are utilized Steam discharge is as heating steam required for heat exchangers for district heating；Open simultaneously 20 No. two valves, 20 No. three valves, 20 No. six Valve, 30 No. four valves and 30 No. five valves are pumped the water at low temperature from hot water heat accumulator is successively defeated by first circulation It send into hydrophobic heat exchanger and heat exchangers for district heating and is heated, enter back into hot water heat accumulator after formation high-temperature water and stored；

Or No. nine valves, No. ten valves and ten No. seven valves are opened, middle pressure steam enters third reducing-and-cooling plant by subtracting Low-pressure steam is formed after temperature decompression, heat exchangers for district heating is then delivered to by heating extraction steam pipe；Open simultaneously 20 No. two valves, two Ten No. three valves, 20 No. six valves, 30 No. four valves and 30 No. five valves, from the water at low temperature using hot water heat accumulator It sequentially enters hydrophobic heat exchanger and heat exchangers for district heating is heated, enter back into hot water heat accumulator after formation high-temperature water and stored；

Or ride on Bus No. 11 valve, ten No. two valves and ten No. seven valves are opened, middle pressure steam enters work device driving power and sets Low-pressure steam is formed after standby acting, then heat exchangers for district heating is delivered to by heating extraction steam pipe；Open simultaneously 20 No. two valves, 20 No. three valves, 20 No. six valves, 30 No. four valves and 30 No. five valves, from using hot water heat accumulator water at low temperature according to It is secondary to be heated into hydrophobic heat exchanger and heat exchangers for district heating, hot water heat accumulator, which is entered back into, after formation high-temperature water is stored；

B, when unit needs to increase externally output electric load, steam extraction accumulation of heat is no longer carried out at this time, is done to increase into steam turbine The steam flow of function carries out heat release to hot water heat accumulator at this time, operates as follows:

20 No. four valves, 20 No. seven valves and 20 No. eight valves are opened, hot water accumulation of heat will be come from by second circulation pump The high-temperature water of device is delivered to hot water heat exchanger and carries out heat release, opens simultaneously 20 No. nine valves and three No. ten valves, closes 30 No.1 valve, boiler feedwater are introduced into hot water heat exchanger and are heated by the high-temperature water from hot water heat accumulator；

Or 20 No. four valves, 30 No. two valves and 30 No. three valves are opened, hot water will be come from by second circulation pump The high-temperature water of storage heater is delivered to radiator and carries out heat release；

When unit is in supplying thermal condition, when unregulated power peak regulation demand, operate as follows:

Only open No.1 valve, No. four valves, No. six valves, ten No. three valves, hydraulic pressure butterfly valve, ten No. four valves, ten No. five valves Door, ten No. six valves, ten No. seven valves, ten No. nine valves, two No. ten valves, three ride on Bus No. 11 valves, 30 No. four valves and three Ten No. five valves, combined cycle unit are externally supplied merely with the low pressure filling of low-pressure superheater or the steam discharge of Steam Turbine Through IP Admission Heat, and the deoxygenation steam of oxygen-eliminating device is from the low pressure filling of low-pressure superheater or the steam discharge of Steam Turbine Through IP Admission；

When unit is in supplying thermal condition, when having power peak regulation demand:

Ten No. three valves and ten No. seven valves are opened, the low pressure filling or Steam Turbine Through IP Admission from low-pressure superheater are utilized Steam discharge is as heating steam required for heat exchangers for district heating；Open ten No. nine valves, two No. ten valves, 30 No. four valves and three Ten No. five valves, the hot net water from heat supply network return pipe sequentially enters hydrophobic heat exchanger and heat exchangers for district heating is heated, and is formed high It is externally confessed after warm hot net water by heat supply network water supplying pipe；Open simultaneously 20 No. two valves, 20 No. three valves and 20 No. six Valve is pumped by first circulation and is successively delivered to the water at low temperature from hot water heat accumulator in hydrophobic heat exchanger and heat exchangers for district heating It is heated, enters back into hot water heat accumulator after formation high-temperature water and stored；

Or No. nine valves, No. ten valves and ten No. seven valves are opened, middle pressure steam enters third reducing-and-cooling plant by subtracting Low-pressure steam is formed after temperature decompression, heat exchangers for district heating is then delivered to by heating extraction steam pipe；Open ten No. nine valves, two No. ten valves Door, 30 No. four valves and 30 No. five valves, the hot net water from heat supply network return pipe sequentially enter hydrophobic heat exchanger and heat supply network Heater is heated, and is externally confessed after forming high temperature hot net water by heat supply network water supplying pipe；Open simultaneously 20 No. two valves, 20 No. three valves and 20 No. six valves sequentially enter hydrophobic heat exchanger and heat supply network heating from the water at low temperature using hot water heat accumulator Device is heated, and is entered back into hot water heat accumulator after formation high-temperature water and is stored；

Or ride on Bus No. 11 valve, ten No. two valves and ten No. seven valves are opened, middle pressure steam enters work device driving power and sets Low-pressure steam is formed after standby acting, then heat exchangers for district heating is delivered to by heating extraction steam pipe；Open ten No. nine valves, two No. ten valves Door, 30 No. four valves and 30 No. five valves, the hot net water from heat supply network return pipe sequentially enter hydrophobic heat exchanger and heat supply network Heater is heated, and is externally confessed after forming high temperature hot net water by heat supply network water supplying pipe；Open simultaneously 20 No. two valves, 20 No. three valves and 20 No. six valves sequentially enter hydrophobic heat exchanger and heat supply network heating from the water at low temperature using hot water heat accumulator Device is heated, and is entered back into hot water heat accumulator after formation high-temperature water and is stored；

B, when unit needs to increase externally output electric load, steam extraction accumulation of heat is no longer carried out at this time, while putting using hot water heat accumulator Heat carrys out external heat supply, to increase the steam flow to do work into steam turbine, operates as follows:

Ten No. seven valves are closed, stop using the steam extraction of unit opening ten No. nine valves, two No. ten valves at this time come external heat supply Door, two ride on Bus No. 11 valves, 20 No. four valves and 20 No. five valves are pumped by second circulation by the height from hot water heat accumulator Warm water is delivered to the external heat supply of heat supply network water supplying pipe；

Or 20 No. four valves, 20 No. seven valves and 20 No. eight valves are opened, hot water will be come from by second circulation pump The high-temperature water of storage heater is delivered to hot water heat exchanger and carries out heat release, opens simultaneously 20 No. nine valves and three No. ten valves, closes Three ride on Bus No. 11 valves, boiler feedwater are introduced into hot water heat exchanger and are heated by the high-temperature water from hot water heat accumulator；

Or 20 No. four valves, 30 No. two valves and 30 No. three valves are opened, hot water will be come from by second circulation pump The high-temperature water of storage heater is delivered to radiator and carries out heat release.

In the operation method of the above-mentioned extraction for heat supply integrated system for combined cycle unit power peak regulation:

When unit has power peak regulation demand, the operating procedure of middle pressure steam is provided for third reducing-and-cooling plant and work device It is as follows:

No. five valves are opened, are set using the steam discharge from steam turbine high-pressure cylinder directly as third reducing-and-cooling plant and acting Standby middle pressure steam source；

Alternatively, opening No. seven valves and No. eight valves, steam passes through shape after the second reducing-and-cooling plant to the heat from reheater again Middle pressure steam source at the lower steam of pressure and temperature, as third reducing-and-cooling plant and work device；

Alternatively, No. two valves and No. three valves are opened, after the main steam from high-pressure superheater passes through the first reducing-and-cooling plant Form the lower steam of pressure and temperature, the middle pressure steam source as third reducing-and-cooling plant and work device；

When unit unregulated power peak regulation demand, the exothermic selection method of hot water heat accumulator is as follows:

In pure condensate operating condition, simultaneous selection opens radiator and opens hot water heat exchanger, or radiator and unlatching are opened in selection The one of which of hot water heat exchanger is used for the external heat release of hot water heat accumulator；

In supplying thermal condition, simultaneous selection is by the external heat supply of heat supply network water supplying pipe, unlatching radiator and opens hot water heat exchanger, or Person selects the external heat supply of heat supply network water supplying pipe, opens radiator and opens the one of which of hot water heat exchanger, is used for hot water heat accumulator External heat release.

When unit provides heating steam for heat exchangers for district heating, the low pressure filling of preferential Selection utilization low-pressure superheater or steam turbine The steam discharge of intermediate pressure cylinder, secondly the steam discharge of Selection utilization work device, the desuperheat of last Selection utilization third reducing-and-cooling plant subtract Press steam；

When unit provides middle pressure steam for third reducing-and-cooling plant and work device, preferential Selection utilization steam turbine high-pressure cylinder High pressure steam discharge, the secondly heat steam again of Selection utilization reheater, the main steam of last Selection utilization high-pressure superheater；

In pure condensate operating condition, preferential selection opens hot water heat exchanger to be used for the external heat release of hot water heat accumulator, and secondly selection is opened Radiator is used for the external heat release of hot water heat accumulator；

In supplying thermal condition, preferential selection is used for the external heat release of hot water heat accumulator by the external heat supply of heat supply network water supplying pipe, secondly Selection opens hot water heat exchanger to be used for the external heat release of hot water heat accumulator, and finally selection opens radiator to be used for hot water heat accumulator External heat release.

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 decoupling of combined cycle unit thermoelectricity Service ability has ensured resident's heating demand；In addition, coupling hot water accumulation of heat simultaneously also in heating system and the feed water system of boiler System had not only realized cooperate with matching of the combined cycle unit power peak regulation with heat supply, but also increased combined cycle unit in pure condensate operating condition Power peak regulation ability when operation.After having used the present invention, the same of the external heat capacity of combined cycle unit is excavated in depth When, effectively reduce the acting capacity loss in heat supplying process.Especially meet the power peak regulation Policy Demand of current rigorous, it is real The depth peak modulation capacity of existing fired power generating unit, meets demand of the power grid to peak load regulation conscientiously, has practice valence higher Value.

Detailed description of the invention

Fig. 1 is the overall structure diagram of the embodiment of the present invention.

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.

The extraction for heat supply integrated system for combined cycle unit power peak regulation referring to Fig. 1, in the present embodiment, comprising: Gas turbine group and vapor wheel unit；

Gas turbine group includes gas turbine blower 1, gas-turbine combustion chamber 2, gas turbine turbine 3 and the first generator 4, The exhaust outlet of gas turbine blower 1 is connect with the air inlet of gas-turbine combustion chamber 2, the exhaust outlet of gas-turbine combustion chamber 2 It is connect with the air inlet of gas turbine turbine 3, the exhaust outlet of gas turbine turbine 3 passes through smoke discharge pipe 31 and waste heat boiler 5 Gas inlet connection, gas turbine turbine 3 drives the power generation of the first generator 4, and gas turbine turbine 3 is calmed the anger with gas turbine Machine 1 is coaxially connected；

Vapor wheel unit includes waste heat boiler 5, steam turbine high-pressure cylinder 6, Steam Turbine Through IP Admission 7, the hair of turbine low pressure cylinder 8, second Motor 9, condenser 10, condensate pump 11, hot water heat exchanger 12, gland heater 13, oxygen-eliminating device 14, the first reducing-and-cooling plant 15, the second reducing-and-cooling plant 16, third reducing-and-cooling plant 17, work device 18, power-equipment 19, heat exchangers for district heating 20, Hydrophobic heat exchanger 21, pumps for hot water supply net 22, first circulation pump 23, hot water heat accumulator 24, second circulation pump 25 and radiator 26, vapour Turbine high pressure cylinder 6, Steam Turbine Through IP Admission 7 and turbine low pressure cylinder 8 are coaxially connected, and drive the power generation of the second generator 9, waste heat pot Furnace 5 includes that smoke-gas preheater 501, low-pressure drum 502, low-pressure superheater 503, HP steam drum 504, reheater 505 and height press through Hot device 506, the water outlet of smoke-gas preheater 501 connect with the water inlet of the water inlet of low-pressure drum 502 and HP steam drum 504 simultaneously It connects, the venthole of low-pressure drum 502 is connect with the air intake of low-pressure superheater 503, and venthole and the height of HP steam drum 504 press through The air intake of hot device 506 connects, and the air intake of steam turbine high-pressure cylinder 6 is gone out by high-pressure steam pipe 33 and high-pressure superheater 506 Steam ports connection, and No.1 valve 61 is installed in the air intake of steam turbine high-pressure cylinder 6, the steam drain of steam turbine high-pressure cylinder 6 passes through Cold steam pipe again 34 is connect with the air intake of reheater 505, and is equipped with No. four valves 64 in the air intake of reheater 505, then By heat, steam pipe 35 is connect the venthole of hot device 505 with the air intake of Steam Turbine Through IP Admission 7 again, and in Steam Turbine Through IP Admission 7 Air intake No. six valves 66 are installed, the steam drain of Steam Turbine Through IP Admission 7 by communicating pipe 36 and turbine low pressure cylinder 8 into Steam ports connection, and hydraulic pressure butterfly valve 74, communicating pipe 36 and the one of low pressure steam pipe 37 are installed in the air intake of turbine low pressure cylinder 8 End connection, and ten No. four valves 75 are installed in one end of low pressure steam pipe 37, the venthole and low pressure of low-pressure superheater 503 steam The other end of steam pipe 37 connects, and is equipped with ten No. five valves 76 in the other end of low pressure steam pipe 37, turbine low pressure cylinder 8 Steam drain is connect with condenser 10, and the water inlet end of boiler feed pipe 32 is connect with condenser 10, the water outlet of boiler feed pipe 32 It is connect with the water inlet of smoke-gas preheater 501, and is sequentially installed with condensed water along water flowing direction on boiler feed pipe 32 Pump 11, hot water heat exchanger 12, gland heater 13 and oxygen-eliminating device 14, the admission end and high-pressure steam pipe 33 of high steam bypass 38 The steam output end of connection, high steam bypass 38 is connect with the admission end of the first middle pressure steam branch pipe 42, and is bypassed in high steam No. two valves 62, the first reducing-and-cooling plant 15 and No. three valves 63 are sequentially installed with along steam flow direction on 38, first The steam output end of middle pressure steam branch pipe 42 is connect with the air intake of third reducing-and-cooling plant 17, and in the first middle pressure steam branch pipe 42 On No. nine valves 69 are installed, the admission end of cold steam by-pass again 39 is connect with cold steam pipe again 34, cold steam by-pass again 39 Steam output end is connect with the admission end of the first middle pressure steam branch pipe 42, and No. five valves 65 are equipped in cold steam by-pass again 39, Steam pipe 35 is connect the admission end of steam by-pass 40 heat again with heat again, the hot steam output end of steam by-pass 40 and the first middle pressure steam again The admission end of branch pipe 42 connects, and in heat again steam by-pass 40 along steam flow direction be sequentially installed with No. seven valves 67, The admission end of second reducing-and-cooling plant 16 and No. eight valves 68, low-pressure steam bypass 41 is connect with low pressure steam pipe 37, low pressure The steam output end of steam by-pass 41 is connect with the admission end of heating extraction steam pipe 45, and is equipped with ten No. three in low-pressure steam bypass 41 The steam output end of valve 73, heating extraction steam pipe 45 is connect with the air intake of heat exchangers for district heating 20, and is installed on heating extraction steam pipe 45 There are ten No. seven valves 78, the venthole of third reducing-and-cooling plant 17 is connect with the admission end of heating extraction steam pipe 45, and in third The venthole of reducing-and-cooling plant 17 is equipped with No. ten valves 70, presses and steams in the admission end and first of the second middle pressure steam branch pipe 43 The admission end of vapour branch pipe 42 connects, and ride on Bus No. 11 valve 71, the second middle pressure steam are equipped on the second middle pressure steam branch pipe 43 The steam output end of branch pipe 43 is connect with the air intake of work device 18, the venthole of work device 18 and heating extraction steam pipe 45 into vapour End connection, and be equipped with ten No. two valves 72 in the venthole of work device 18, the hydrophobic outlet of heat exchangers for district heating 20 with it is hydrophobic The hydrophobic import connection of the high temperature of heat exchanger 21, the hydrophobic outlet of the low temperature of hydrophobic heat exchanger 21 pass through drain pipe 46 and condensate pump 11 Water inlet connection, and ten No. eight valves 79 are installed on drain pipe 46, heat supply network return pipe 47 is low with hydrophobic heat exchanger 21 Warm water side-entrance connection, and 34 are separately installed in the water at low temperature side-entrance of hydrophobic heat exchanger 21 and heat supply network return pipe 47 Number 95, ten No. nine valves 80 of valve and pumps for hot water supply net 22, the water at low temperature side outlet and heat exchangers for district heating 20 of hydrophobic heat exchanger 21 Water side-entrance connection, the water side outlet of heat exchangers for district heating 20 connect with heat supply network water supplying pipe 48, and in the water of heat exchangers for district heating 20 It is separately installed with 30 No. five valve 96 and two No. ten valves 81 on side outlet and heat supply network water supplying pipe 48, the one of hot water heat accumulator 24 Port is connect with one end of one end of accumulation of heat low temperature water pipe 49 and the first accumulation of heat low temperature branch pipe 53 simultaneously, hot water heat accumulator 24 it is another Single port is connect with one end of accumulation of heat high-temperature conduit 51, the other end of accumulation of heat low temperature water pipe 49 and the water at low temperature of hydrophobic heat exchanger 21 Side-entrance connection, and first circulation pump 23 is installed on accumulation of heat low temperature water pipe 49, first circulation pump 23 is provided with accumulation of heat low temperature Bypass 50, and first circulation pump 23 import, outlet and accumulation of heat low temperature bypass 50 on be separately installed with 20 No. three valves 84, 20 No. two valves 83 and two ride on Bus No. 11 valves 82, the other end of the first accumulation of heat low temperature branch pipe 53 and the high temperature of hot water heat exchanger 12 The connection of water side outlet, and is equipped with 20 No. seven valves 88 on the first accumulation of heat low temperature branch pipe 53, accumulation of heat high-temperature conduit 51 it is another One end is connect with heat supply network water supplying pipe 48, and second circulation pump 25 is equipped on accumulation of heat high-temperature conduit 51, and second circulation pump 25 is set It is equipped with accumulation of heat high temperature bypass 52, and is separately installed with two in the import in second circulation pump 25, outlet and accumulation of heat high temperature bypass 52 The outlet of ten No. four valves, 85,20 No. five valve 86 and 20 No. six valves 87, second circulation pump 25 is also high with the first accumulation of heat One end of warm branch pipe 54 connects, and the high-temperature water side-entrance of the other end and hot water heat exchanger 12 of the first accumulation of heat high temperature branch pipe 54 connects It connects, and 20 No. eight valves 89 is installed on the first accumulation of heat high temperature branch pipe 54.

Oxygen-eliminating device 14 bypasses 41 steam output end, third reducing-and-cooling plant by deoxygenation extraction steam pipe 44 with low-pressure steam simultaneously 17 venthole, the venthole of work device 18 and heating extraction steam pipe 45 connect, and are equipped with 16 on deoxygenation extraction steam pipe 44 Number valve 77.

Work device 18 drives power-equipment 19 to do work, and work device 18 is back pressure machine or screw expander, power Equipment 19 is generator, condensate pump 11, pumps for hot water supply net 22, first circulation pump 23 or second circulation pump 25.

Third reducing-and-cooling plant 17 is connected in parallel with work device 18, while being oxygen-eliminating device 14 and heat exchangers for district heating 20 Steam required for providing.

The admission end of second middle pressure steam branch pipe 43 simultaneously also with the steam output end of high steam bypass 38, cold steam by-pass again 39 steam output end is connected with the steam output end of hot steam by-pass 40 again.

The water at low temperature side of hot water heat exchanger 12 be provided with feed pipe bypass 55, and the water at low temperature side of hot water heat exchanger 12 into 20 No. nine valves, 90, three No. ten valves 91 and 31 are separately installed in mouth, water at low temperature side outlet and feed pipe bypass 55 Number valve 92.

One end of hot water heat accumulator 24 is also connect with one end of the second accumulation of heat low temperature branch pipe 57, the second accumulation of heat low temperature branch pipe 57 The other end connect with the water outlet of radiator 26, and 30 No. three valves 94 are installed on the second accumulation of heat low temperature branch pipe 57； The outlet of second circulation pump 25 is also connect with one end of the second accumulation of heat high temperature branch pipe 56, the other end of the second accumulation of heat high temperature branch pipe 56 It is connect with the water inlet of radiator 26, and 30 No. two valves 93 is installed on the second accumulation of heat high temperature branch pipe 56.

In the present embodiment, carrying out practically method is as follows:

Only open 74, ten No. four 66, ten No. three valves 73 of the valve 64, six of No.1 valve 61, four valve, hydraulic pressure butterfly valve valves 75, ten No. five valves, 76, ten No. six valves 77 and three ride on Bus No. 11 valves 92, combined cycle unit does not carry out heat supply externally, and removes The deoxygenation steam of oxygen device 14 is from the low pressure filling of low-pressure superheater 503 or the steam discharge of Steam Turbine Through IP Admission 7；

A, when unit needs to reduce externally output electric load, then the steam stream of steam turbine acting is lowered by steam extraction accumulation of heat Amount carries out accumulation of heat by hot water heat accumulator 24 at this time, operates as follows:

Open ten No. three valve 73 and ten No. seven valves 78, using from low-pressure superheater 503 low pressure filling or steam turbine The steam discharge of intermediate pressure cylinder 7 is as heating steam required for heat exchangers for district heating 20；Open simultaneously 20 No. two valves 83,23 Valve 95 and 30 No. five valve 96 of valve 87,34 of valve 84,26 passes through first circulation pump self-heating in 23 future The water at low temperature of water storage heater 24 is successively delivered in hydrophobic heat exchanger 21 and heat exchangers for district heating 20 and is heated, and is formed after high-temperature water again It is stored into hot water heat accumulator 24；

Or 69, No. ten valve 70 and ten No. seven valves 78 of No. nine valves are opened, middle pressure steam enters third reducing-and-cooling plant 17 form low-pressure steam after pressure and temperature reducing, are then delivered to heat exchangers for district heating 20 by heating extraction steam pipe 45；Open simultaneously two Ten No. two 87,30 No. four valve 95 and 30 No. five valves 96 of valve of valve 84,26 of valve 83,23 come Hydrophobic heat exchanger 21 is sequentially entered from the water at low temperature using hot water heat accumulator 24 and heat exchangers for district heating 20 is heated, and forms high-temperature water After enter back into hot water heat accumulator 24 and stored；

Or 71, ten No. two valve 72 and ten No. seven valves 78 of ride on Bus No. 11 valve are opened, middle pressure steam enters the drive of work device 18 Dynamic power-equipment 19 forms low-pressure steam after doing work, then is delivered to heat exchangers for district heating 20 by heating extraction steam pipe 45；Open simultaneously two Ten No. two 87,30 No. four valve 95 and 30 No. five valves 96 of valve of valve 84,26 of valve 83,23 come Hydrophobic heat exchanger 21 is sequentially entered from the water at low temperature using hot water heat accumulator 24 and heat exchangers for district heating 20 is heated, and forms high-temperature water After enter back into hot water heat accumulator 24 and stored；

B, when unit needs to increase externally output electric load, steam extraction accumulation of heat is no longer carried out at this time, is done to increase into steam turbine The steam flow of function carries out heat release to hot water heat accumulator 24 at this time, operates as follows:

20 No. four valves, 85,20 No. seven valve 88 and 20 No. eight valves 89 are opened, will be come from by second circulation pump 25 The high-temperature water of hot water heat accumulator 24 is delivered to hot water heat exchanger 12 and carries out heat release, opens simultaneously 20 No. nine valves 90 and three No. ten Valve 91, closes three ride on Bus No. 11 valves 92, and boiler feedwater is introduced into hot water heat exchanger 12 by the high temperature from hot water heat accumulator 24 Water heating；

Or 20 No. four valves, 85,30 No. two valve 93 and 30 No. three valves 94 are opened, it will by second circulation pump 25 High-temperature water from hot water heat accumulator 24 is delivered to radiator 26 and carries out heat release；

Only open 74, ten No. four 66, ten No. three valves 73 of the valve 64, six of No.1 valve 61, four valve, hydraulic pressure butterfly valve valves 75, ten No. five valves 76,16 valve 77,17 valve 78,19 valve 80,20 valve 81, three ride on Bus No. 11s 92,30 No. four valve 95 and 30 No. five valves 96 of valve, combined cycle unit are mended merely with the low pressure of low-pressure superheater 503 Vapour or the external heat supply of the steam discharge of Steam Turbine Through IP Admission 7, and the deoxygenation steam of oxygen-eliminating device 14 is from the low pressure of low-pressure superheater 503 The steam discharge of filling or Steam Turbine Through IP Admission 7；

Open ten No. three valve 73 and ten No. seven valves 78, using from low-pressure superheater 503 low pressure filling or steam turbine The steam discharge of intermediate pressure cylinder 7 is as heating steam required for heat exchangers for district heating 20；Open ten No. nine valves, 80, two No. ten valves 81, 30 No. four valve 95 and 30 No. five valves 96, the hot net water from heat supply network return pipe 47 sequentially enter 21 He of hydrophobic heat exchanger Heat exchangers for district heating 20 is heated, and is externally confessed after forming high temperature hot net water by heat supply network water supplying pipe 48；Open simultaneously 20 No. two 83,20 No. three valve 84 and 20 No. six valves 87 of valve, will be from the low of hot water heat accumulator 24 by first circulation pump 23 Warm water is successively delivered in hydrophobic heat exchanger 21 and heat exchangers for district heating 20 and is heated, and enters back into hot water heat accumulator after forming high-temperature water 24 are stored；

Or 69, No. ten valve 70 and ten No. seven valves 78 of No. nine valves are opened, middle pressure steam enters third reducing-and-cooling plant 17 form low-pressure steam after pressure and temperature reducing, are then delivered to heat exchangers for district heating 20 by heating extraction steam pipe 45；Open ten No. nine Valve 95 and 30 No. five valve 96 of valve 81,34 of valve 80,20, the hot net water from heat supply network return pipe 47 according to It is secondary to be heated into hydrophobic heat exchanger 21 and heat exchangers for district heating 20, it is formed after high temperature hot net water and is externally supplied by heat supply network water supplying pipe 48 Out；20 No. two valves, 83,20 No. three valve 84 and 20 No. six valves 87 are opened simultaneously, comes from and utilizes hot water heat accumulator 24 Water at low temperature sequentially enter hydrophobic heat exchanger 21 and heat exchangers for district heating 20 is heated, enter back into hot water heat accumulator after forming high-temperature water 24 are stored；

Or 71, ten No. two valve 72 and ten No. seven valves 78 of ride on Bus No. 11 valve are opened, middle pressure steam enters the drive of work device 18 Dynamic power-equipment 19 forms low-pressure steam after doing work, then is delivered to heat exchangers for district heating 20 by heating extraction steam pipe 45；Open ten No. nine Valve 95 and 30 No. five valve 96 of valve 81,34 of valve 80,20, the hot net water from heat supply network return pipe 47 according to It is secondary to be heated into hydrophobic heat exchanger 21 and heat exchangers for district heating 20, it is formed after high temperature hot net water and is externally supplied by heat supply network water supplying pipe 48 Out；20 No. two valves, 83,20 No. three valve 84 and 20 No. six valves 87 are opened simultaneously, comes from and utilizes hot water heat accumulator 24 Water at low temperature sequentially enter hydrophobic heat exchanger 21 and heat exchangers for district heating 20 is heated, enter back into hot water heat accumulator after forming high-temperature water 24 are stored；

B, when unit needs to increase externally output electric load, steam extraction accumulation of heat is no longer carried out at this time, while utilizing hot water heat accumulator 24 Heat release carrys out external heat supply, to increase the steam flow to do work into steam turbine, operates as follows:

Ten No. seven valves 78 are turned down or closed, reduce or stop using the steam extraction of unit opening ten No. nine at this time come external heat supply 80, two No. ten valves 81 of valve, two ride on Bus No. 11 valves, 82,20 No. four valve 85 and 20 No. five valves 86, are followed by second High-temperature water from hot water heat accumulator 24 is delivered to the external heat supply of heat supply network water supplying pipe 48 by ring pump 25；

Or 20 No. four valves, 85,20 No. seven valve 88 and 20 No. eight valves 89 are opened, it will by second circulation pump 25 High-temperature water from hot water heat accumulator 24 is delivered to hot water heat exchanger 12 and carries out heat release, opens simultaneously 20 No. nine valves 90 and three No. ten valves 91, close three ride on Bus No. 11 valves 92, and boiler feedwater is introduced into hot water heat exchanger 12 by from hot water heat accumulator 24 High-temperature water heating；

Or 20 No. four valves, 85,30 No. two valve 93 and 30 No. three valves 94 are opened, it will by second circulation pump 25 High-temperature water from hot water heat accumulator 24 is delivered to radiator 26 and carries out heat release.

In above-mentioned operation method:

When unit has power peak regulation demand, the operation of middle pressure steam is provided for third reducing-and-cooling plant 17 and work device 18 Steps are as follows:

No. five valves 65 are opened, using the steam discharge from steam turbine high-pressure cylinder 6 directly as 17 He of third reducing-and-cooling plant The middle pressure steam source of work device 18；

Alternatively, opening No. seven valves 67 and No. eight valves 68, steam is filled the heat from reheater 505 by the second pressure and temperature reducing again The lower steam of pressure and temperature, the middle pressure steam as third reducing-and-cooling plant 17 and work device 18 are formed after setting 16 Source；

Alternatively, opening No. two valves 62 and No. three valves 63, the main steam from high-pressure superheater 506 passes through the first pressure and temperature reducing The lower steam of pressure and temperature is formed after device 15, is steamed as the middle pressure of third reducing-and-cooling plant 17 and work device 18 Vapour source；

When unit unregulated power peak regulation demand, the exothermic selection method of hot water heat accumulator 24 is as follows:

In pure condensate operating condition, simultaneous selection opens radiator 26 and opens hot water heat exchanger 12, or radiator 26 is opened in selection With the one of which for opening hot water heat exchanger 12, it to be used for the external heat release of hot water heat accumulator 24；

In supplying thermal condition, simultaneous selection is by the external heat supply of heat supply network water supplying pipe 48, unlatching radiator 26 and opens hot water heat exchange Device 12, or the selection external heat supply of heat supply network water supplying pipe 48, the one of which for opening radiator 26 and unlatching hot water heat exchanger 12, are used In the external heat release of hot water heat accumulator 24.

When unit is that heat exchangers for district heating 20 provides heating steam, the low pressure of preferential Selection utilization low-pressure superheater 503 is mended The steam discharge of vapour or Steam Turbine Through IP Admission 7, the steam discharge of next Selection utilization work device 18, last Selection utilization third pressure and temperature reducing The pressure and temperature reducing steam of device 17；

When unit is third reducing-and-cooling plant 17 and work device 18 provides middle pressure steam, preferential Selection utilization steam turbine is high The high pressure steam discharge of cylinder pressure 6, the hot steam again of next Selection utilization reheater 505, the master of last Selection utilization high-pressure superheater 506 Steam；

In pure condensate operating condition, preferential selection opens hot water heat exchanger 12 to be used for the external heat release of hot water heat accumulator 24, secondly selects Radiator 26 is opened to be used for the external heat release of hot water heat accumulator 24；

In supplying thermal condition, preferential selection is used for the external heat release of hot water heat accumulator 24 by the external heat supply of heat supply network water supplying pipe 48, Secondly selection opens hot water heat exchanger 12 to be used for the external heat release of hot water heat accumulator 24, and finally selection opens radiator 26 to be used for The external heat release of hot water heat accumulator 24.

Radiator 26 in the present embodiment can use water-cooling pattern, can also use air-cooled mode.

In the carrying out practically method of the present embodiment, all valves all have the function of adjusting pipeline fluid flow；Except liquid It presses except butterfly valve 74, other valves all have the function of truncation.

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 connection The DCS control system for closing Cycle Unit, which remotely operates, to be completed；The storage emission capacity and storage Exotherm Time of hot water heat accumulator 24 need same When consider power peak regulation depth requirements, the external heat capacity of unit and unit steam extraction integrated system regulating power etc. it is comprehensive because Usually 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

1. a kind of extraction for heat supply integrated system for combined cycle unit power peak regulation characterized by comprising gas turbine Group and vapor wheel unit；

The gas turbine group includes gas turbine blower (1), gas-turbine combustion chamber (2), gas turbine turbine (3) and The exhaust outlet of one generator (4), the gas turbine blower (1) is connect with the air inlet of gas-turbine combustion chamber (2), described The exhaust outlet of gas-turbine combustion chamber (2) is connect with the air inlet of gas turbine turbine (3), the gas turbine turbine (3) Exhaust outlet is connect by smoke discharge pipe (31) with the gas inlet of waste heat boiler (5), and the gas turbine turbine (3) drives the One generator (4) power generation, and gas turbine turbine (3) and gas turbine blower (1) are coaxially connected；

The vapor wheel unit includes waste heat boiler (5), steam turbine high-pressure cylinder (6), Steam Turbine Through IP Admission (7), steam turbine low-pressure Cylinder (8), condenser (10), condensate pump (11), hot water heat exchanger (12), gland heater (13), removes the second generator (9) Oxygen device (14), the first reducing-and-cooling plant (15), the second reducing-and-cooling plant (16), third reducing-and-cooling plant (17), acting Equipment (18), power-equipment (19), heat exchangers for district heating (20), hydrophobic heat exchanger (21), pumps for hot water supply net (22), first circulation pump (23), hot water heat accumulator (24), second circulation pump (25) and radiator (26), press in the steam turbine high-pressure cylinder (6), steam turbine Cylinder (7) and turbine low pressure cylinder (8) are coaxially connected, and drive the second generator (9) power generation, and the waste heat boiler (5) includes cigarette Air preheater (501), low-pressure drum (502), low-pressure superheater (503), HP steam drum (504), reheater (505) and height press through Hot device (506), the water outlet of the smoke-gas preheater (501) while water inlet and HP steam drum with low-pressure drum (502) (504) water inlet connection, the venthole of the low-pressure drum (502) is connect with the air intake of low-pressure superheater (503), described The venthole of HP steam drum (504) is connect with the air intake of high-pressure superheater (506), the steam turbine high-pressure cylinder (6) into vapour Mouth is connect by high-pressure steam pipe (33) with the venthole of high-pressure superheater (506), and the air intake in steam turbine high-pressure cylinder (6) It is equipped with No.1 valve (61), the steam drain of the steam turbine high-pressure cylinder (6) passes through cold steam pipe again (34) and reheater (505) Air intake connection, and No. four valves (64) are installed in the air intake of reheater (505), the reheater (505) goes out vapour By heat, steam pipe (35) is connect mouth with the air intake of Steam Turbine Through IP Admission (7) again, and the air intake in Steam Turbine Through IP Admission (7) No. six valves (66) are installed, the steam drain of the Steam Turbine Through IP Admission (7) passes through communicating pipe (36) and turbine low pressure cylinder (8) Air intake connection, and be equipped with hydraulic pressure butterfly valve (74) in the air intake of turbine low pressure cylinder (8), the communicating pipe (36) with it is low One end connection of steam pipe (37) is pressed, and ten No. four valves (75), the low pressure are installed in one end of low pressure steam pipe (37) The venthole of superheater (503) is connect with the other end of low pressure steam pipe (37), and is pacified in the other end of low pressure steam pipe (37) Equipped with ten No. five valves (76), the steam drain of the turbine low pressure cylinder (8) is connect with condenser (10), boiler feed pipe (32) Water inlet end connect with condenser (10), the water inlet of the water outlet of the boiler feed pipe (32) and smoke-gas preheater (501) Connection, and on boiler feed pipe (32) along water flowing direction be sequentially installed with condensate pump (11), hot water heat exchanger (12), The admission end of gland heater (13) and oxygen-eliminating device (14), high steam bypass (38) is connect with high-pressure steam pipe (33), described The steam output end of high steam bypass (38) is connect with the admission end of the first middle pressure steam branch pipe (42), and is bypassed in high steam (38) No. two valves (62), the first reducing-and-cooling plant (15) and No. three valves are sequentially installed with along steam flow direction on (63), the steam output end of the first middle pressure steam branch pipe (42) is connect with the air intake of third reducing-and-cooling plant (17), and No. nine valves (69), the admission end and cold steam pipe again of cold steam by-pass again (39) are installed on the first middle pressure steam branch pipe (42) (34) it connecting, the steam output end of the cold steam by-pass again (39) is connect with the admission end of the first middle pressure steam branch pipe (42), and No. five valves (65), the hot admission end of steam by-pass (40) again and hot steam pipe (35) again are installed on cold steam by-pass again (39) Connection, the steam output end of steam by-pass (40) is connect the heat with the admission end of the first middle pressure steam branch pipe (42) again, and it is hot again No. seven valves (67), the second reducing-and-cooling plant (16) and eight are sequentially installed with along steam flow direction in steam by-pass (40) The admission end of number valve (68), low-pressure steam bypass (41) is connect with low pressure steam pipe (37), the low-pressure steam bypass (41) Steam output end connect with the admission end of heating extraction steam pipe (45), and low-pressure steam bypass (41) on ten No. three valves are installed (73), the steam output end of the heating extraction steam pipe (45) is connect with the air intake of heat exchangers for district heating (20), and in heating extraction steam pipe (45) ten No. seven valves (78), venthole and heating extraction steam pipe (45) of the third reducing-and-cooling plant (17) are installed on Admission end connection, and No. ten valves (70), the second middle pressure steam branch are installed in the venthole of third reducing-and-cooling plant (17) The admission end of pipe (43) is connect with the admission end of the first middle pressure steam branch pipe (42), and is pacified on the second middle pressure steam branch pipe (43) Equipped with ride on Bus No. 11 valve (71), the steam output end of the second middle pressure steam branch pipe (43) and the air intake of work device (18) connect It connects, the venthole of work device (18) is connect with the admission end of heating extraction steam pipe (45), and the venthole in work device (18) Ten No. two valves (72) are installed, the hydrophobic outlet of the heat exchangers for district heating (20) and the high temperature of hydrophobic heat exchanger (21) it is hydrophobic into Mouth connection, the hydrophobic outlet of the low temperature of hydrophobic heat exchanger (21) are connect by drain pipe (46) with the water inlet of condensate pump (11), And ten No. eight valves (79), the water at low temperature side of heat supply network return pipe (47) and hydrophobic heat exchanger (21) are installed on drain pipe (46) Import connection, and 30 No. four valves (95) are installed in the water at low temperature side-entrance of hydrophobic heat exchanger (21), in heat supply network return pipe (47) ten No. nine valves (80) and pumps for hot water supply net (22) be installed on, the water at low temperature side outlet of the hydrophobic heat exchanger (21) with The water side-entrance of heat exchangers for district heating (20) connects, and the water side outlet of heat exchangers for district heating (20) is connect with heat supply network water supplying pipe (48), and 30 No. five valve (96) He Ershi are separately installed on the water side outlet and heat supply network water supplying pipe (48) of heat exchangers for district heating (20) The Single port of number valve (81), the hot water heat accumulator (24) is low with one end of accumulation of heat low temperature water pipe (49) and the first accumulation of heat simultaneously One end of warm branch pipe (53) connects, and the another port of hot water heat accumulator (24) is connect with one end of accumulation of heat high-temperature conduit (51), institute The other end for stating accumulation of heat low temperature water pipe (49) is connect with the water at low temperature side-entrance of hydrophobic heat exchanger (21), and in accumulation of heat low temperature water pipe (49) first circulation pump (23) is installed, the first circulation pump (23) is provided with accumulation of heat low temperature bypass (50), and first on 20 No. three valves (84), 20 No. two are separately installed in import, outlet and the accumulation of heat low temperature bypass (50) of circulating pump (23) Valve (83) and two ride on Bus No. 11 valves (82), the other end and hot water heat exchanger (12) of the first accumulation of heat low temperature branch pipe (53) The connection of high-temperature water side outlet, and 20 No. seven valves (88) are installed on the first accumulation of heat low temperature branch pipe (53), the accumulation of heat is high The other end of warm water tube (51) is connect with heat supply network water supplying pipe (48), and second circulation pump is equipped on accumulation of heat high-temperature conduit (51) (25), second circulation pump (25) is provided with accumulation of heat high temperature bypass (52), and the import of second circulation pump (25), outlet and 20 No. four valves (85), 20 No. five valve (86) No. six valves of He Ershi are separately installed in accumulation of heat high temperature bypass (52) (87), the outlet of the second circulation pump (25) is also connect with one end of the first accumulation of heat high temperature branch pipe (54), the first accumulation of heat high temperature The other end of branch pipe (54) is connect with the high-temperature water side-entrance of hot water heat exchanger (12), and on the first accumulation of heat high temperature branch pipe (54) 20 No. eight valves (89) are installed.

2. the extraction for heat supply integrated system according to claim 1 for combined cycle unit power peak regulation, feature exist In steam output end, third desuperheat of the oxygen-eliminating device (14) by deoxygenation extraction steam pipe (44) simultaneously with low-pressure steam bypass (41) subtract The venthole of pressure device (17), the venthole of work device (18) and heating extraction steam pipe (45) connection, and in deoxygenation extraction steam pipe (44) ten No. six valves (77) are installed on.

3. the extraction for heat supply integrated system according to claim 1 for combined cycle unit power peak regulation, feature exist In, the work device (18) driving power-equipment (19) is done work, and work device (18) is back pressure machine or screw expander, Power-equipment (19) is generator, condensate pump (11), pumps for hot water supply net (22), first circulation pumps (23) or second circulation pumps (25).

4. the extraction for heat supply integrated system according to claim 1 for combined cycle unit power peak regulation, feature exist In the third reducing-and-cooling plant (17) is to be connected in parallel, while adding for oxygen-eliminating device (14) and heat supply network with work device (18) Steam required for hot device (20) provides.

5. the extraction for heat supply integrated system according to claim 1 for combined cycle unit power peak regulation, feature exist In the admission end of the second middle pressure steam branch pipe (43) also bypasses steam output end, the cold steam again of (38) with high steam simultaneously The steam output end for bypassing (39) is connected with the steam output end of hot steam by-pass (40) again.

6. the extraction for heat supply integrated system according to claim 1 for combined cycle unit power peak regulation, feature exist In the water at low temperature side of the hot water heat exchanger (12) is provided with feed pipe bypass (55), and the low temperature in hot water heat exchanger (12) 20 No. nine valves (90), three No. ten valves are separately installed in water side-entrance, water at low temperature side outlet and feed pipe bypass (55) (91) and three ride on Bus No. 11 valves (92).

7. the extraction for heat supply integrated system according to claim 1 for combined cycle unit power peak regulation, feature exist In one end of the hot water heat accumulator (24) is also connect with one end of the second accumulation of heat low temperature branch pipe (57), the second accumulation of heat low temperature branch The other end of pipe (57) is connect with the water outlet of radiator (26), and is equipped with 33 on the second accumulation of heat low temperature branch pipe (57) Number valve (94)；The outlet of the second circulation pump (25) is also connect with one end of the second accumulation of heat high temperature branch pipe (56), and second stores The other end of hot high temperature branch pipe (56) is connect with the water inlet of radiator (26), and is installed on the second accumulation of heat high temperature branch pipe (56) There are 30 No. two valves (93).

8. a kind of such as the integrated system of the extraction for heat supply of any of claims 1-7 for combined cycle unit power peak regulation The operation method of system, which is characterized in that the operation method is as follows:

Only open No.1 valve (61), No. four valves (64), No. six valves (66), ten No. three valves (73), hydraulic pressure butterfly valve (74), Ten No. four valves (75), ten No. five valves (76), ten No. six valves (77) and three ride on Bus No. 11 valves (92), combined cycle unit is not Heat supply is externally carried out, and the deoxygenation steam of oxygen-eliminating device (14) is in the low pressure filling of low-pressure superheater (503) or steam turbine The steam discharge of cylinder pressure (7)；

A, when unit needs to reduce externally output electric load, then the steam stream of steam turbine acting is lowered by steam extraction accumulation of heat Amount carries out accumulation of heat by hot water heat accumulator (24) at this time, operates as follows:

Open ten No. three valves (73) and ten No. seven valves (78), using from low-pressure superheater (503) low pressure filling or The steam discharge of Steam Turbine Through IP Admission (7) is as heating steam required for heat exchangers for district heating (20)；Open simultaneously 20 No. two valves (83), No. five 20 No. three valves (84), 20 No. six valves (87), 30 No. four valve (95) He Sanshi valves (96) are led to It crosses first circulation pump (23) and the water at low temperature from hot water heat accumulator (24) is successively delivered to hydrophobic heat exchanger (21) and heat supply network adds It is heated in hot device (20), enters back into hot water heat accumulator (24) after formation high-temperature water and stored；

Or it opens No. nine valves (69), No. ten valves (70) and ten No. seven valves (78), middle pressure steam and enters third desuperheat and subtract Pressure device (17) forms low-pressure steam after pressure and temperature reducing, is then delivered to heat exchangers for district heating by heating extraction steam pipe (45) (20)；Open simultaneously 20 No. two valves (83), 20 No. three valves (84), 20 No. six valves (87), 30 No. four valves (95) No. five valves (96) of He Sanshi, from using hot water heat accumulator (24) water at low temperature sequentially enter hydrophobic heat exchanger (21) and Heat exchangers for district heating (20) is heated, and is entered back into hot water heat accumulator (24) after formation high-temperature water and is stored；

Or it opens ride on Bus No. 11 valve (71), ten No. two valves (72) and ten No. seven valves (78), middle pressure steam and enters acting and set Low-pressure steam is formed after standby (18) driving power-equipment (19) acting, then heat exchangers for district heating is delivered to by heating extraction steam pipe (45) (20)；Open simultaneously 20 No. two valves (83), 20 No. three valves (84), 20 No. six valves (87), 30 No. four valves (95) No. five valves (96) of He Sanshi, from using hot water heat accumulator (24) water at low temperature sequentially enter hydrophobic heat exchanger (21) and Heat exchangers for district heating (20) is heated, and is entered back into hot water heat accumulator (24) after formation high-temperature water and is stored；

B, when unit needs to increase externally output electric load, steam extraction accumulation of heat is no longer carried out at this time, is done to increase into steam turbine The steam flow of function carries out heat release to hot water heat accumulator (24) at this time, operates as follows:

No. eight 20 No. four valves (85), 20 No. seven valve (88) He Ershi valves (89) are opened, are pumped by second circulation (25) high-temperature water from hot water heat accumulator (24) is delivered to hot water heat exchanger (12) and carries out heat release, open simultaneously 20 No. nine Valve (90) and three No. ten valves (91), close three ride on Bus No. 11 valves (92), and boiler feedwater is introduced into hot water heat exchanger (12) quilt High-temperature water heating from hot water heat accumulator (24)；

Or No. tri- 20 No. four valves (85), 30 No. two valve (93) He Sanshi valves (94) are opened, pass through second circulation High-temperature water from hot water heat accumulator (24) is delivered to radiator (26) and carries out heat release by pump (25)；

Only open No.1 valve (61), No. four valves (64), No. six valves (66), ten No. three valves (73), hydraulic pressure butterfly valve (74), Ten No. four valves (75), ten No. five valves (76), ten No. six valves (77), ten No. seven valves (78), ten No. nine valves (80), two No. five No. ten valves (81), three ride on Bus No. 11 valves (92), 30 No. four valve (95) He Sanshi valves (96), combined cycle unit Merely with the low pressure filling of low-pressure superheater (503) or the external heat supply of steam discharge of Steam Turbine Through IP Admission (7), and oxygen-eliminating device (14) Deoxygenation steam is from the low pressure filling of low-pressure superheater (503) or the steam discharge of Steam Turbine Through IP Admission (7)；

Open ten No. three valves (73) and ten No. seven valves (78), using from low-pressure superheater (503) low pressure filling or The steam discharge of Steam Turbine Through IP Admission (7) is as heating steam required for heat exchangers for district heating (20)；Open ten No. nine valves (80), two No. five No. ten valves (81), 30 No. four valve (95) He Sanshi valves (96), from heat supply network return pipe (47) hot net water according to It is secondary to be heated into hydrophobic heat exchanger (21) and heat exchangers for district heating (20), pass through heat supply network water supplying pipe (48) after forming high temperature hot net water Externally confess；No. six 20 No. two valves (83), 20 No. three valve (84) He Ershi valves (87) are opened simultaneously, pass through first Water at low temperature from hot water heat accumulator (24) is successively delivered to hydrophobic heat exchanger (21) and heat exchangers for district heating by circulating pump (23) (20) it is heated in, enters back into hot water heat accumulator (24) after formation high-temperature water and stored；

Or it opens No. nine valves (69), No. ten valves (70) and ten No. seven valves (78), middle pressure steam and enters third desuperheat and subtract Pressure device (17) forms low-pressure steam after pressure and temperature reducing, is then delivered to heat exchangers for district heating by heating extraction steam pipe (45) (20)；No. five ten No. nine valves (80), two No. ten valves (81), 30 No. four valve (95) He Sanshi valves (96) are opened, are come Hydrophobic heat exchanger (21) is sequentially entered from the hot net water of heat supply network return pipe (47) and heat exchangers for district heating (20) is heated, and forms high temperature It is externally confessed after hot net water by heat supply network water supplying pipe (48)；Open simultaneously 20 No. two valves (83), 20 No. three valves (84) With 20 No. six valves (87), comes from and sequentially enter hydrophobic heat exchanger (21) and heat supply network using the water at low temperature of hot water heat accumulator (24) Heater (20) is heated, and is entered back into hot water heat accumulator (24) after formation high-temperature water and is stored；

Or it opens ride on Bus No. 11 valve (71), ten No. two valves (72) and ten No. seven valves (78), middle pressure steam and enters acting and set Low-pressure steam is formed after standby (18) driving power-equipment (19) acting, then heat exchangers for district heating is delivered to by heating extraction steam pipe (45) (20)；No. five ten No. nine valves (80), two No. ten valves (81), 30 No. four valve (95) He Sanshi valves (96) are opened, are come Hydrophobic heat exchanger (21) is sequentially entered from the hot net water of heat supply network return pipe (47) and heat exchangers for district heating (20) is heated, and forms high temperature It is externally confessed after hot net water by heat supply network water supplying pipe (48)；Open simultaneously 20 No. two valves (83), 20 No. three valves (84) With 20 No. six valves (87), comes from and sequentially enter hydrophobic heat exchanger (21) and heat supply network using the water at low temperature of hot water heat accumulator (24) Heater (20) is heated, and is entered back into hot water heat accumulator (24) after formation high-temperature water and is stored；

B, when unit needs to increase externally output electric load, steam extraction accumulation of heat is no longer carried out at this time, while utilizing hot water heat accumulator (24) heat release carrys out external heat supply, to increase the steam flow to do work into steam turbine, operates as follows:

Ten No. seven valves (78) are closed, stop using the steam extraction of unit opening ten No. nine valves (80), two at this time come external heat supply No. five No. ten valves (81), two ride on Bus No. 11 valves (82), 20 No. four valve (85) He Ershi valves (86), pass through second circulation High-temperature water from hot water heat accumulator (24) is delivered to heat supply network water supplying pipe (48) external heat supply by pump (25)；

Or No. eight 20 No. four valves (85), 20 No. seven valve (88) He Ershi valves (89) are opened, pass through second circulation High-temperature water from hot water heat accumulator (24) is delivered to hot water heat exchanger (12) and carries out heat release by pump (25), opens simultaneously 29 Number valve (90) and three No. ten valves (91), close three ride on Bus No. 11 valves (92), and boiler feedwater is introduced into hot water heat exchanger (12) It is heated by the high-temperature water from hot water heat accumulator (24)；

Or No. tri- 20 No. four valves (85), 30 No. two valve (93) He Sanshi valves (94) are opened, pass through second circulation High-temperature water from hot water heat accumulator (24) is delivered to radiator (26) and carries out heat release by pump (25).

9. the operation side of the extraction for heat supply integrated system according to claim 8 for combined cycle unit power peak regulation Method, which is characterized in that

It is third reducing-and-cooling plant (17) and work device (18) offer middle pressure steam when unit has power peak regulation demand Operating procedure is as follows:

No. five valves (65) are opened, using the steam discharge from steam turbine high-pressure cylinder (6) directly as third reducing-and-cooling plant (17) and the middle pressure steam source of work device (18)；

Alternatively, opening No. seven valves (67) and No. eight valves (68), steam passes through the second desuperheat to the heat from reheater (505) again Decompressor (16) forms the lower steam of pressure and temperature afterwards, as third reducing-and-cooling plant (17) and work device (18) middle pressure steam source；

Alternatively, opening No. two valves (62) and No. three valves (63), the main steam from high-pressure superheater (506) subtracts by first Warm decompressor (15) forms the lower steam of pressure and temperature afterwards, as third reducing-and-cooling plant (17) and work device (18) middle pressure steam source；

When unit unregulated power peak regulation demand, hot water heat accumulator (24) exothermic selection method is as follows:

In pure condensate operating condition, simultaneous selection opens radiator (26) and opens hot water heat exchanger (12), or heat dissipation is opened in selection Device (26) and the one of which for opening hot water heat exchanger (12) are used for hot water heat accumulator (24) external heat release；

In supplying thermal condition, simultaneous selection is by heat supply network water supplying pipe (48) external heat supply, unlatching radiator (26) and opens hot water Heat exchanger (12), or selection heat supply network water supplying pipe (48) externally heat supply, unlatching radiator (26) and unlatching hot water heat exchanger (12) One of which, be used for hot water heat accumulator (24) external heat release.

10. the operation of the extraction for heat supply integrated system for combined cycle unit power peak regulation according to claim 8 or claim 9 Method, which is characterized in that

When unit is that heat exchangers for district heating (20) provide heating steam, the low pressure of preferential Selection utilization low-pressure superheater (503) is mended The steam discharge of vapour or Steam Turbine Through IP Admission (7), the steam discharge of next Selection utilization work device (18), last Selection utilization third desuperheat The pressure and temperature reducing steam of decompressor (17)；

When unit is third reducing-and-cooling plant (17) and work device (18) provides middle pressure steam, preferential Selection utilization steamer The high pressure steam discharge of machine high pressure cylinder (6), the hot steam again of next Selection utilization reheater (505), last Selection utilization high pressure superheater The main steam of device (506)；

In pure condensate operating condition, preferential selection opens hot water heat exchanger (12) to be used for hot water heat accumulator (24) external heat release, secondly Selection opens radiator (26) to be used for hot water heat accumulator (24) external heat release；

In supplying thermal condition, preferential selection is externally put by the external heat supply of heat supply network water supplying pipe (48) to be used for hot water heat accumulator (24) Heat, secondly selection opens hot water heat exchanger (12) to be used for hot water heat accumulator (24) external heat release, and finally radiator is opened in selection (26) it is used for hot water heat accumulator (24) external heat release.