CN111608753A - Peak regulation system of combined solid electric heat storage device for high-low bypass modification of cogeneration unit - Google Patents
Peak regulation system of combined solid electric heat storage device for high-low bypass modification of cogeneration unit Download PDFInfo
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- 238000005338 heat storage Methods 0.000 title claims abstract description 95
- 239000007787 solid Substances 0.000 title claims abstract description 92
- 230000004048 modification Effects 0.000 title claims abstract description 17
- 238000012986 modification Methods 0.000 title claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000000605 extraction Methods 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000008236 heating water Substances 0.000 claims description 24
- 238000009413 insulation Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 10
- 238000010248 power generation Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 8
- 239000003638 chemical reducing agent Substances 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/16—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines being only of turbine type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/028—Steam generation using heat accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
- F24D11/004—Central heating systems using heat accumulated in storage masses water heating system with conventional supplementary heat source
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/58—The condition being electrical
- H02J2310/60—Limiting power consumption in the network or in one section of the network, e.g. load shedding or peak shaving
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/62—The condition being non-electrical, e.g. temperature
- H02J2310/64—The condition being economic, e.g. tariff based load management
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
- Y04S20/244—Home appliances the home appliances being or involving heating ventilating and air conditioning [HVAC] units
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Abstract
The peak regulation system of the combined solid electric heat storage device for high-low bypass modification of the cogeneration unit comprises a high-low bypass steam extraction and heat supply device and a solid electric heat storage device; high-low bypass steam extraction heating device: the steam pipeline of the superheater in the boiler is divided into two paths, one path enters a high-pressure cylinder through a high-pressure cylinder regulating valve, the other path reaches a reheater through a high-pressure bypass regulating valve, the high-pressure cylinder is connected with a medium-pressure cylinder and the reheater, the steam pipeline of the reheater is divided into two paths, one path enters the medium-pressure cylinder through the medium-pressure cylinder regulating valve, the other path enters a temperature and pressure reducing device and then is connected to a heating pipeline, the other path reaches a heat exchange first station through the heating pipeline, then is connected to a condenser; the invention realizes that the lowest electric load can reach below 10 percent of rated load under the condition of ensuring the safe and stable operation of the unit without adjusting the combustion of the boiler, increases the heat load, and has low modification and operation cost and good economy.
Description
The technical field is as follows:
the invention belongs to the field of power systems, and particularly relates to a deep peak shaving system of a combined solid electric heat storage device for high-low bypass modification of a cogeneration unit.
Background art:
with the rapid development of new energy industry in China, the demand of a power grid on the flexibility of a thermal power generating unit is gradually increased, and the problem that the peak regulation capability is improved in a heavy-load heating period in winter becomes urgent to be solved by the existing thermal power generating unit.
At present, the domestic cogeneration units must be fixed by heat when running in winter, that is, the lowest power load on the grid depends on the heat load, and although the adjustment can be carried out, the adjustment range is very limited.
The peak regulation depth of the thermoelectric unit in northern areas is only about 20%, so that the peak regulation capacity of the thermoelectric unit is improved in various modes, the thermoelectric unit can better serve the access of a power grid to new energy, and the thermoelectric unit has important significance for heat supply power enterprises.
At present, means for realizing peak regulation of a heat supply unit comprise a steam extraction scheme at an inlet and an outlet of a boiler reheater, a steam extraction scheme of putting a high-pressure bypass of the unit into a boiler, a low-pressure cylinder zero-output transformation scheme and the like. However, the schemes also have common defects at present, namely the deep peak regulation capacity of the unit is still limited by the lowest stable combustion load and denitration of the boiler, the unit is limited by the lowest heating load required when running at the back pressure, the heat load is required to have a certain scale to match the higher steam discharge of the large-capacity unit, and the adaptability is lower.
The invention content is as follows:
the purpose of the invention is as follows:
the invention aims to make up for the defects and technical problems of the prior art in the background art, and provides a deep peak regulation system and an operation method of a combined solid electric heat storage device for high-low bypass modification of a cogeneration unit, so that the deep peak regulation of the cogeneration unit during heating in winter can be realized under the condition of not influencing the safe and stable operation of the unit.
The technical scheme is as follows:
the combined solid electric heat storage device degree of depth peak regulation system is reformed transform to combined heat and power cogeneration unit height bypass, its characterized in that: the system comprises a high-low bypass steam extraction and heat supply device and a solid electric heat storage device (21);
high-low bypass steam extraction heating device: the steam pipeline of the superheater (2) in the boiler (3) is divided into two paths, one path enters a high-pressure cylinder (6) through a high-pressure cylinder regulating valve (5), the other path reaches a reheater (4) through a high-pressure bypass regulating valve (1), the high-pressure cylinder (6) is connected with an intermediate-pressure cylinder (7) and (is connected with the reheater (4) through a high-pressure cylinder steam exhaust check valve (8), the steam pipeline of the reheater (4) is divided into two paths, one path enters the intermediate-pressure cylinder (7) through an intermediate-pressure cylinder regulating valve (9), the other path enters a temperature and pressure reducer (16) and then is connected into a heating pipeline (25), the other path reaches a heat exchange first station (22) through the heating pipeline and then is connected into a condenser (17), and;
electric energy generated by the steam turbine generator (19) reaches (is connected with) the high-voltage station transformer (14) through the generator outgoing cable (15), the high-voltage station transformer (14) supplies power to the solid electric heat storage device (21) through the solid electric heat storage incoming cable (20), the solid electric heat storage device (21) reaches the heat exchange initial station (22) through the solid electric heat storage device heating water outlet pipeline (23) for heating, and water return circulation is carried out through the solid electric heat storage device heating water return pipeline (24).
The solid electric heat storage device (21) comprises a high-pressure chamber (Q1), a heat storage chamber (Q2) and a steam heat exchanger unit (Q3);
a high-voltage power distribution cabinet (28) in the high-voltage chamber (Q1) (through a solid electric heat storage device incoming cable 27) is connected with a solid electric heat storage incoming cable (20);
the heat storage chamber (Q2) comprises a heat insulation layer (30) and a heat accumulator (31) arranged in the heat insulation layer (30), an air channel is formed between the heat insulation layer (30) and the heat accumulator (31) (the top of the heat accumulator (31) is generally a high-temperature air channel), and the high-voltage power distribution cabinet (28) is connected with the heat accumulator (31) through a high-voltage cable (29);
an inlet of a steam heat exchanger (34) in the steam heat exchanger unit (Q3) is communicated with a high-temperature air channel (32) in the heat insulation layer (30), a low-temperature air channel (33) of a circulating fan (36) connected with the steam heat exchanger (34) is communicated with the lower part in the heat insulation layer (30) (the lower part of the heat insulation layer (30) is generally used as a low-temperature air area), a heating water outlet (35) of the steam heat exchanger (34) is communicated with a heating water outlet pipeline (23), and a water return port of the steam heat exchanger (34) is connected with a heating water return pipeline (24).
The steam heat exchanger unit (Q3) also comprises a water replenishing tank (39) and a circulating water pump (40); the water replenishing tank (39) is connected with the steam heat exchanger (34) through a circulating water pump (40).
A deep peak regulation method for a combined solid electric heat storage device for high-low bypass modification of a cogeneration unit comprises the following steps:
when peak shaving is needed, namely, the heat load is increased, and when the electric load is reduced, the high-pressure bypass regulating valve (1) is opened before main steam enters the turbonator to act; after the bypassed main steam and the high-pressure cylinder exhaust steam are mixed, the steam enters a reheater (4) for heating, one path of the reheated steam enters an intermediate pressure cylinder (7) for power generation, the other path of the steam is sprayed with water (through a temperature and temperature reduction pressure reducer (16)) for temperature reduction and then supplies heat to the outside, and an exhaust steam pipeline of the intermediate pressure cylinder (7) is divided into two paths to respectively enter a low-pressure cylinder (18) and a heat supply pipeline.
When deep peak regulation is needed, the exhausted steam of the intermediate pressure cylinder can not enter the low pressure cylinder, and all the exhausted steam is used for heat supply after being subjected to temperature reduction and pressure reduction through a temperature reduction and pressure reduction device (16).
If the peak shaving depth is still insufficient, the solid electric heat storage device can be started to absorb the electric load and increase the heat load; the solid electric heat storage device can store heat and supply heat during deep peak shaving, also can store heat by using low-price electricity during valley time, and releases heat when heat supply is needed in daytime.
The advantages and effects are as follows:
the invention is realized by the following technical scheme: the deep peak regulation device and the operation method of the combined solid electric heat storage system for high-low bypass modification of the cogeneration unit are provided.
The combined solid electric heat storage system depth peak regulation device for high-low bypass modification of the cogeneration unit comprises a high-pressure bypass regulating valve, a superheater, a boiler, a reheater, a high-pressure cylinder regulating valve, a high-pressure cylinder, a medium-pressure cylinder, a high-pressure cylinder steam exhaust check valve, a medium-pressure cylinder regulating valve, a medium-low pressure cylinder communicated steam exhaust check valve, a medium-low pressure cylinder communicated steam exhaust regulating valve, a medium-low pressure cylinder communicated regulating valve, a transformer substation high-pressure cable, a high-pressure station transformer, a generator outlet cable, a temperature and pressure reducer, a condenser, a low-pressure cylinder, a turbogenerator, a solid electric heat storage device inlet cable, a solid electric heat storage device, a heat exchange head station, a solid electric heat storage device heating water outlet pipeline, a solid electric heat.
The main steam generated by the superheater in the boiler is divided into two paths, wherein one path of the main steam enters the intermediate pressure cylinder through the high-pressure cylinder regulating valve and is used for pushing the steam turbine to generate power; the other path of the waste heat is heated and pressurized to a reheater through a high-pressure bypass regulating valve. High-pressure steam coming out of the reheater is divided into two paths through a pipeline, one path of the high-pressure steam enters the intermediate pressure cylinder through the intermediate pressure cylinder regulating valve, the other path of the high-pressure steam enters the temperature and pressure reducing device, the steam subjected to temperature and pressure reducing enters the heating pipeline, and the steam reaches the heat exchange initial station through the heating pipeline. And the low-temperature steam after heat exchange enters a condenser for cooling.
The electric energy generated by the turbonator reaches the high-voltage station transformer through the generator outgoing cable, the solid electric heat storage device is powered through the solid electric heat storage incoming cable, the solid electric heat storage device reaches the heat exchange initial station through the solid electric heat storage device heating water outlet pipeline for heating, and the solid electric heat storage device heating water return pipeline is used for water return circulation.
The solid electric heat storage device comprises a high-pressure chamber, a heat storage chamber, a steam heat exchanger unit and the like.
And the high-voltage power supply enters the solid electric heat storage device through the high-voltage cable so as to supply power to the solid electric heat storage device.
The high-voltage power supply can be used as house service power or from a power grid, the power supply voltage can be determined according to specific requirements, and the flexibility is strong.
The solid electric heating energy storage device adopts high-quality magnesia bricks, the heat storage temperature is high, and the mechanical structure is stable.
The operation method of the combined solid electricity heat accumulation deep peak regulation system for high-low bypass modification of the cogeneration unit is operated according to the following method:
in the winter heating period, the heat load needs to be increased, and the electric load needs to be reduced. In order to ensure the safe and stable operation of the boiler, the steam inlet amount of the high-pressure cylinder is reduced by starting the high-side loop under the condition that the boiler load cannot be reduced, and simultaneously the steam discharged by the intermediate pressure cylinder is not fed into the low-pressure cylinder to generate electricity and is completely used for supplying heat, so that the purposes of increasing the heat load, reducing the electric load and achieving peak shaving are achieved.
Preferably, when deep peak regulation is needed, in order to ensure safe and stable operation of the generator set, when the lowest electric load can not be reduced, the solid electric heating energy storage device is thrown to absorb electric energy for deep peak regulation. The surplus electric load is used for heating and storing heat of the heat accumulator, so that the heat load is complemented when the heat load is insufficient. The purpose of deep peak regulation is achieved.
Preferably, the working time of the solid electric heat storage device can be selected in a valley electricity time period, and the solid electric heat storage device can also be operated to store heat and supply heat when the heat supply demand is large.
The invention has the beneficial effects that: through a combined solid electricity heat storage device degree of depth peak regulation system is reformed transform to combined heat and power cogeneration unit height bypass, realize not adjusting boiler burning, under the condition of guaranteeing unit safety and stability operation, minimum electric load can reach below 10% of rated load, has increased the heat load simultaneously, and transformation and running cost are low, have good economic nature.
Description of the drawings:
FIG. 1 is a diagram showing the overall system structure of the present invention.
Fig. 2 is a partial system structural view of the solid electric heat storage device of the present invention.
In fig. 1: 1. the system comprises a high-pressure bypass regulating valve, 2, a superheater, 3, a boiler, 4, a reheater, 5, a high-pressure cylinder regulating valve, 6, a high-pressure cylinder, 7, an intermediate-pressure cylinder, 8, a high-pressure cylinder steam exhaust check valve, 9, an intermediate-pressure cylinder regulating valve, 10, a medium-low pressure cylinder communicated steam extraction check valve, 11, a medium-low pressure cylinder steam extraction regulating valve, 12, a medium-low pressure cylinder communicated regulating valve, 13, a transformer substation high-pressure cable, 14, a high-pressure plant transformer, 15, a generator outlet cable, 16, a temperature and pressure reducer, 17, a condenser, 18, a low-pressure cylinder, 19, a turbonator, 20, a solid electric heat storage device inlet cable, 21, a solid electric heat storage device, 22, a heat exchange head station, 23, a solid electric heat storage device heating outlet pipeline, 24, a solid electric heat storage device water.
In fig. 2: q1, high-pressure chamber, Q2, regenerator, Q3, steam heat exchanger group, 27, solid electricity heat accumulation device inlet wire cable, 28, high-voltage distribution cabinet, 29, high-voltage cable, 30, heat preservation, 31, heat accumulator, 32, high-temperature air flue, 33, low-temperature air flue, 34, steam heat exchanger, 35, heating water outlet, 36, circulating fan, 37, water tank water replenishing port, 38, drain, 39, water replenishing tank, 40, circulating water pump.
The specific implementation mode is as follows:
the combined solid electric heat storage device degree of depth peak regulation system is reformed transform to combined heat and power cogeneration unit height bypass, its characterized in that: the system comprises a high-low bypass steam extraction and heat supply device and a solid electric heat storage device (21);
high-low bypass steam extraction heating device: the steam pipeline of the superheater (2) in the boiler (3) is divided into two paths, one path enters a high-pressure cylinder (6) through a high-pressure cylinder regulating valve (5), the other path reaches a reheater (4) through a high-pressure bypass regulating valve (1), the high-pressure cylinder (6) is connected with an intermediate-pressure cylinder (7) and (is connected with the reheater (4) through a high-pressure cylinder steam exhaust check valve (8), the steam pipeline of the reheater (4) is divided into two paths, one path enters the intermediate-pressure cylinder (7) through an intermediate-pressure cylinder regulating valve (9), the other path enters a temperature and pressure reducer (16) and then is connected into a heating pipeline (25), the other path reaches a heat exchange first station (22) through the heating pipeline and then is connected into a condenser (17), and;
electric energy generated by the steam turbine generator (19) reaches (is connected with) the high-voltage station transformer (14) through the generator outgoing cable (15), the high-voltage station transformer (14) supplies power to the solid electric heat storage device (21) through the solid electric heat storage incoming cable (20), the solid electric heat storage device (21) reaches the heat exchange initial station (22) through the solid electric heat storage device heating water outlet pipeline (23) for heating, and water return circulation is carried out through the solid electric heat storage device heating water return pipeline (24).
The solid electric heat storage device (21) comprises a high-pressure chamber (Q1), a heat storage chamber (Q2) and a steam heat exchanger unit (Q3);
a high-voltage power distribution cabinet (28) in the high-voltage chamber (Q1) (through a solid electric heat storage device incoming cable 27) is connected with a solid electric heat storage incoming cable (20);
the heat storage chamber (Q2) comprises a heat insulation layer (30) and a heat accumulator (31) arranged in the heat insulation layer (30), an air channel is formed between the heat insulation layer (30) and the heat accumulator (31) (the top of the heat accumulator (31) is generally a high-temperature air channel), and the high-voltage power distribution cabinet (28) is connected with the heat accumulator (31) through a high-voltage cable (29);
an inlet of a steam heat exchanger (34) in the steam heat exchanger unit (Q3) is communicated with a high-temperature air channel (32) in the heat insulation layer (30), a low-temperature air channel (33) of a circulating fan (36) connected with the steam heat exchanger (34) is communicated with the lower part in the heat insulation layer (30) (the lower part of the heat insulation layer (30) is generally used as a low-temperature air area), a heating water outlet (35) of the steam heat exchanger (34) is communicated with a heating water outlet pipeline (23), and a water return port of the steam heat exchanger (34) is connected with a heating water return pipeline (24).
The steam heat exchanger unit (Q3) also comprises a water replenishing tank (39) and a circulating water pump (40); the water replenishing tank (39) is connected with the steam heat exchanger (34) through a circulating water pump (40).
A deep peak regulation method for a combined solid electric heat storage device for high-low bypass modification of a cogeneration unit is characterized by comprising the following steps of:
when peak shaving is needed, namely, the heat load is increased, and when the electric load is reduced, the high-pressure bypass regulating valve (1) is opened before main steam enters the turbonator to act; after the bypassed main steam and the high-pressure cylinder exhaust steam are mixed, the steam enters a reheater (4) for heating, one path of the reheated steam enters an intermediate pressure cylinder (7) for power generation, the other path of the steam is sprayed with water (through a temperature and temperature reduction pressure reducer (16)) for temperature reduction and then supplies heat to the outside, and an exhaust steam pipeline of the intermediate pressure cylinder (7) is divided into two paths to respectively enter a low-pressure cylinder (18) and a heat supply pipeline.
When deep peak regulation is needed, the exhausted steam of the intermediate pressure cylinder can not enter the low pressure cylinder, and all the exhausted steam is used for heat supply after being subjected to temperature reduction and pressure reduction through a temperature reduction and pressure reduction device (16).
If the peak shaving depth is still insufficient, the solid electric heat storage device can be started to absorb the electric load and increase the heat load; the solid electric heat storage device can store heat and supply heat during deep peak shaving, also can store heat by using low-price electricity during valley time, and releases heat when heat supply is needed in daytime. The solid electric heat storage device is started, namely, electric energy generated by a steam turbine generator (19) reaches (is connected with) a high-voltage station transformer (14) through a generator outgoing cable (15), the high-voltage station transformer (14) supplies power to the solid electric heat storage device (21) through a solid electric heat storage incoming cable (20), the solid electric heat storage device (21) reaches a heat exchange initial station (22) through a solid electric heat storage device heating water outlet pipeline (23) for heating, and water return circulation is carried out through a solid electric heat storage device heating water return pipeline (24).
For a further understanding of the present invention, reference will now be made in detail to the following examples.
Example (b):
as shown in fig. 1, a combined solid electric heat storage device deep peak shaving system for high-low bypass modification of a cogeneration unit comprises a high-low bypass steam extraction and heat supply device and a solid electric heat storage device.
As shown in fig. 1, the high-low bypass steam extraction and heat supply device comprises a high-pressure bypass regulating valve 1, a high-pressure bypass regulating valve 2, a superheater 3, a boiler 4, a reheater 5, a high-pressure cylinder regulating valve 6, a high-pressure cylinder 7, an intermediate-pressure cylinder 8, a high-pressure cylinder steam extraction check valve 9, an intermediate-pressure cylinder regulating valve 10, a medium-low pressure cylinder communication steam extraction check valve 11, a medium-low pressure cylinder steam extraction regulating valve 12, a medium-low pressure cylinder communication regulating valve 13, a transformer substation high-voltage cable 14, the system comprises a high-voltage plant transformer, 15, a generator outgoing cable, 16, a temperature and pressure reducing device, 17, a condenser, 18, a low-voltage cylinder, 19, a turbine generator, 20, a solid electric heat storage incoming cable, 21, a solid electric heat storage device, 22, a heat exchange initial station, 23, a solid electric heat storage device heating water outlet pipeline, 24, a solid electric heat storage device water return pipeline, 25, a user heating pipeline, 26 and a user water return pipeline.
When deep peak shaving is required for winter heating, the following example can be taken:
the main steam generated by the superheater 2 in the boiler 3 is divided into two paths, and one path of the main steam enters a high-pressure cylinder through a high-pressure cylinder regulating valve 5 and is used for pushing a steam turbine to generate power; the other path reaches a reheater 4 for temperature and pressure increasing through a high-pressure bypass regulating valve 1. The high-pressure steam from the reheater 4 is divided into two paths through a pipeline, one path enters the intermediate pressure cylinder 7 through the intermediate pressure cylinder regulating valve 9, the other path enters the temperature and pressure reducing device 16, and the steam subjected to temperature and pressure reduction enters the heating pipeline 25 and reaches the heat exchange initial station 22 through the heating pipeline. The low-temperature steam after heat exchange enters a condenser 17 for cooling.
The electric energy generated by the turbonator 19 reaches the boosting transformer substation 14 through the generator outgoing cable 15, the high-voltage station transformer 14 supplies power to the solid electric heat storage device 21 through the solid electric heat storage incoming cable 20, the solid electric heat storage device 21 reaches the heat exchange initial station 22 through the solid electric heat storage device heating water outlet pipeline 23 for heating, and the solid electric heat storage device heating water return pipeline 24 is used for water return circulation.
The deep peak regulation of the power plant can be realized through the method.
When peak load is required to be adjusted, namely, the heat load is increased, and the electric load is reduced, the high-pressure bypass regulating valve 1 is opened before main steam enters the steam turbine to do work. After the main steam of the bypass is mixed with the exhaust steam of the high-pressure cylinder, the steam enters the reheater 4 for heating, one path of the reheated steam enters the intermediate pressure cylinder 7 for power generation, the other path of the steam is subjected to water spraying and temperature reduction and then supplies heat to the outside, and the exhaust steam pipeline of the intermediate pressure cylinder is divided into two paths which respectively enter the low-pressure cylinder 7 and the heat supply pipeline. When the peak regulation is needed, the exhausted steam of the middle pressure cylinder can not enter the low pressure cylinder, and all the exhausted steam is used for heat supply after being subjected to temperature reduction and pressure reduction by the temperature and pressure reduction device 16.
If the peak shaving depth is still insufficient, the solid electric heat storage device can be started to absorb the electric load and increase the heat load. The solid electric heat storage device can store heat and supply heat during deep peak shaving, also can store heat by using low-price electricity during valley time, and releases heat when heat supply is needed in daytime.
Claims (6)
1. The combined solid electric heat storage device degree of depth peak regulation system is reformed transform to combined heat and power cogeneration unit height bypass, its characterized in that: the system comprises a high-low bypass steam extraction and heat supply device and a solid electric heat storage device (21);
high-low bypass steam extraction heating device: the steam pipeline of the superheater (2) in the boiler (3) is divided into two paths, one path enters a high-pressure cylinder (6) through a high-pressure cylinder regulating valve (5), the other path reaches a reheater (4) through a high-pressure bypass regulating valve (1), the high-pressure cylinder (6) is connected with the reheater (4), the steam pipeline of the reheater (4) is divided into two paths, one path enters an intermediate pressure cylinder (7) through an intermediate pressure cylinder regulating valve (9), the other path enters a temperature and pressure reducing device (16) and then is connected into a heating pipeline (25), and the other path reaches a heat exchange initial station (22) through the heating pipeline and then is connected into a condenser (;
the steam turbine generator (19) reaches the high-pressure station transformer (14) through the generator outgoing cable (15), the high-pressure station transformer (14) supplies power to the solid electric heat storage device (21) through the solid electric heat storage incoming cable (20), and the solid electric heat storage device (21) reaches the heat exchange initial station (22) through the solid electric heat storage device heating water outlet pipeline (23) for heating and returns water through the solid electric heat storage device heating water return pipeline (24) for water return circulation.
2. The combined solid electric heat storage device deep peak regulation system for high-low bypass modification of cogeneration units according to claim 1, characterized in that: the solid electric heat storage device (21) comprises a high-pressure chamber (Q1), a heat storage chamber (Q2) and a steam heat exchanger unit (Q3);
a high-voltage power distribution cabinet (28) in the high-voltage chamber (Q1) is connected with the solid electric heat storage incoming cable (20);
the heat storage chamber (Q2) comprises a heat insulation layer (30) and a heat accumulator (31) arranged in the heat insulation layer (30), an air channel is formed between the heat insulation layer (30) and the heat accumulator (31), and the high-voltage power distribution cabinet (28) is connected with the heat accumulator (31) through a high-voltage cable (29);
an inlet of a steam heat exchanger (34) in the steam heat exchanger unit (Q3) is communicated with a high-temperature air channel (32) in the heat insulation layer (30), a low-temperature air channel (33) of a circulating fan (36) connected with the steam heat exchanger (34) is communicated with the lower part in the heat insulation layer (30), a heating water outlet (35) of the steam heat exchanger (34) is communicated with a heating water outlet pipeline (23), and a water return port of the steam heat exchanger (34) is connected with a heating water return pipeline (24).
3. The combined solid electric heat storage device deep peak regulation system for high-low bypass modification of cogeneration units according to claim 2, characterized in that: the steam heat exchanger unit (Q3) also comprises a water replenishing tank (39) and a circulating water pump (40); the water replenishing tank (39) is connected with the steam heat exchanger (34) through a circulating water pump (40).
4. A deep peak regulation method for a combined solid electric heat storage device for high-low bypass modification of a cogeneration unit is characterized by comprising the following steps of:
when peak shaving is needed, namely, the heat load is increased, and when the electric load is reduced, the high-pressure bypass regulating valve (1) is opened before main steam enters the turbonator to act; after the main steam and the high-pressure cylinder exhaust steam of the bypass are mixed, the steam enters a reheater (4) for heating, one path of the reheated steam enters an intermediate pressure cylinder (7) for power generation, the other path of the steam is subjected to water spraying and temperature reduction and then supplies heat to the outside, and an exhaust steam pipeline of the intermediate pressure cylinder (7) is divided into two paths and respectively enters a low-pressure cylinder (18) and a heat supply pipeline.
5. The deep peak regulation method of the combined solid electric heat storage device for high-low bypass modification of the cogeneration unit according to claim 4, characterized by comprising the following steps: when deep peak regulation is needed, the exhausted steam of the intermediate pressure cylinder can not enter the low pressure cylinder, and all the exhausted steam is used for heat supply after being subjected to temperature reduction and pressure reduction through a temperature reduction and pressure reduction device (16).
6. The deep peak regulation method of the combined solid electric heat storage device for high-low bypass modification of the cogeneration unit according to claim 5, characterized by comprising the following steps: if the peak shaving depth is still insufficient, the solid electric heat storage device is started to absorb the electric load and increase the heat load.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566259A (en) * | 2021-08-18 | 2021-10-29 | 西安热工研究院有限公司 | Heat storage coupling high-low bypass and cylinder cutting combined heat and power unit and operation method thereof |
| CN115749985A (en) * | 2022-11-11 | 2023-03-07 | 东方电气集团东方汽轮机有限公司 | Seasonal parameter-varying operation method for back-extraction type steam turbine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA766292B (en) * | 1975-10-27 | 1977-09-28 | Tokyo Shibaura Electric Co | Control systems for steam turbine plants including turbine bypass systems |
| CN104879820A (en) * | 2015-02-17 | 2015-09-02 | 大连传森科技有限公司 | High-voltage and energy-accumulation steam system |
| CN107060917A (en) * | 2016-12-16 | 2017-08-18 | 大唐东北电力试验研究所有限公司 | Cogeneration units depth peak regulation system and method are improved using unit bypass heat supply |
| CN206668347U (en) * | 2017-06-21 | 2017-11-24 | 沈阳奥瑞驰电力科技有限公司 | The system that the high other transformation of boiler combines electric accumulation of heat lifting peak load regulation flexibility |
| CN207779191U (en) * | 2017-11-16 | 2018-08-28 | 沈阳兰昊新能源科技有限公司 | Electric heat storage energy device |
| CN108468574A (en) * | 2018-04-03 | 2018-08-31 | 赫普科技发展（北京）有限公司 | A kind of system for realizing three kinds of state switchover operations of thermoelectricity unit |
| CN110220405A (en) * | 2019-05-22 | 2019-09-10 | 国网辽宁省电力有限公司大连供电公司 | Solid heat storage heat transfer control method based on Fourier number consistency |
-
2020
- 2020-04-28 CN CN202010349321.8A patent/CN111608753A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ZA766292B (en) * | 1975-10-27 | 1977-09-28 | Tokyo Shibaura Electric Co | Control systems for steam turbine plants including turbine bypass systems |
| CN104879820A (en) * | 2015-02-17 | 2015-09-02 | 大连传森科技有限公司 | High-voltage and energy-accumulation steam system |
| CN107060917A (en) * | 2016-12-16 | 2017-08-18 | 大唐东北电力试验研究所有限公司 | Cogeneration units depth peak regulation system and method are improved using unit bypass heat supply |
| CN206668347U (en) * | 2017-06-21 | 2017-11-24 | 沈阳奥瑞驰电力科技有限公司 | The system that the high other transformation of boiler combines electric accumulation of heat lifting peak load regulation flexibility |
| CN207779191U (en) * | 2017-11-16 | 2018-08-28 | 沈阳兰昊新能源科技有限公司 | Electric heat storage energy device |
| CN108468574A (en) * | 2018-04-03 | 2018-08-31 | 赫普科技发展（北京）有限公司 | A kind of system for realizing three kinds of state switchover operations of thermoelectricity unit |
| CN110220405A (en) * | 2019-05-22 | 2019-09-10 | 国网辽宁省电力有限公司大连供电公司 | Solid heat storage heat transfer control method based on Fourier number consistency |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566259A (en) * | 2021-08-18 | 2021-10-29 | 西安热工研究院有限公司 | Heat storage coupling high-low bypass and cylinder cutting combined heat and power unit and operation method thereof |
| CN115749985A (en) * | 2022-11-11 | 2023-03-07 | 东方电气集团东方汽轮机有限公司 | Seasonal parameter-varying operation method for back-extraction type steam turbine |
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