CN105201573B - Back pressure turbine heat supply and energy storage system and heat supply and energy storage method thereof - Google Patents
Back pressure turbine heat supply and energy storage system and heat supply and energy storage method thereof Download PDFInfo
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- CN105201573B CN105201573B CN201510598656.2A CN201510598656A CN105201573B CN 105201573 B CN105201573 B CN 105201573B CN 201510598656 A CN201510598656 A CN 201510598656A CN 105201573 B CN105201573 B CN 105201573B
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention discloses a back pressure turbine heat supply and energy storage system and a heat supply and energy storage method thereof, relates to a heat supply and energy storage system of a thermal power plant, and particularly relates to a back pressure turbine heat supply steam and rear-mounted back pressure turbine energy storage system. The back pressure turbine heat supply and energy storage system comprises a back pressure turbine heat supply sub-system and an energy storage sub-system, wherein the back pressure turbine heat supply sub-system comprises a boiler, a heat supply back pressure turbine, a small steam-driven pump turbine, a low pressure deaerator, a water supply pump, a standby water supply pump, a high pressure heater, a continuous blowdown flash tank, an intermittent blowdown flash tank and a temperature-decreased pressure reducer; the energy storage sub-system comprises an energy storage back pressure turbine, a cold water tank, a hot water tank, a steam water heater, an automatic water supply controller, a hot water pump and a cold water pump; in a heat load valley, the excess supplied heat of the heat supply back pressure turbine is stored in the hot water tank through the energy storage system; in a heat load peak, hot water in the hot water tank is supplied in a heat supply back pressure turbine regenerative system, the steam amount of the heat supply back pressure turbine exhaust steam heating regenerative system is decreased, and the external heat supply amount is increased.
Description
Technical field
A kind of present invention back pressure machine heat supply, energy-storage system and its heat supply energy storage method refer to a kind of heat supply of steam power plant
Energy-storage system, especially a kind of back pressure machine heating steam adds rearmounted back pressure machine energy-storage system.
Background technology
The heating system of conventional thermoelectric factory back pressure machine mainly includes back pressure machine and the temperature-decreased pressure reducer that puts into operation.Steam power plant's back pressure machine
Heat supply by back pressure machine directly externally heat supply, when exceeding the heating load of back pressure machine, put into operation temperature-decreased pressure reducer heat supply；Work as thermic load
Less than back pressure machine rated heating capacity when, back pressure machine under-capacity operation.
Steam power plant's heat user produce order of classes or grades at school with heat user heat with heat, there are larger change in produce load rate and season
Change, substantially each heat user use heat of 24 hours is all different, when heat user has 2 classes of systems and 3 classes processed, use thermal change
Become apparent from.
When being run using temperature-decreased pressure reducer, this part heating steam does not have cogeneration of heat and power, uneconomical；Back pressure machine load shedding is transported
During row, depart from back pressure machine design conditions so that back pressure machine exhaust temperature raises, internal efficiency reduces, reduce the economy of back pressure machine.
There is presently no and there is no the special energy-storage system for back pressure machine.
Content of the invention
The purpose of the present invention is to provide a kind of back pressure machine heat supply, energy-storage system and its heat supply energy storage for above-mentioned weak point
Method, increases energy storage back pressure machine, boiler and automatic controller on the basis of former heat supply back pressure machine heating system, low in thermic load
Gu Shi, the unnecessary heating load of heat supply back pressure machine passes through this energy-storage system, is stored in boiler；When thermic load peak, enter
The feedwater of heat supply back pressure machine heat regenerative system is the hot water in boiler, reduces the steam that heat supply back pressure machine steam discharge heats heat regenerative system
Consumption, increases external heating load.
The present invention takes technical scheme below to realize:
A kind of back pressure machine heat supply, energy-storage system include back pressure machine and supply thermal sub-system and energy storage subsystem；
Described back pressure machine includes boiler, heat supply back pressure machine, the little steam turbine of pneumatic pump, low pressure oxygen-eliminating device, feedwater for thermal sub-system
Pump, auxiliary feed water pump, high-pressure heater, continuous blowdown flash tank, regular unloading container and temperature-decreased pressure reducer；Boiler go out vapour
Mouth is connected with the main inlet throttle-stop valve import of heat supply back pressure machine by main steam line；The exhaust vent of heat supply back pressure machine is divided into two-way, and one
Road is connected with the heat supply mouth of pipe, and another road, after the little steam turbine of pneumatic pump, is connected with low pressure oxygen-eliminating device；The low pressure of low pressure oxygen-eliminating device is given
Water end (W.E.) is connected with inlet of high pressure heater with auxiliary feed water pump by feed pump；The hot water outlet of high-pressure heater and boiler
Water inlet is connected, and sends into boiler economizer, the sewage draining exit of boiler and continuous blowdown flash tank phase through the hot water of high-pressure heater
Even；Continuous blowdown flash tank sewage draining exit is connected with regular unloading container, and the sewer in continuous blowdown flash tank accesses periodically
Blowdown system.
Described energy storage subsystem includes energy storage back pressure machine, cold water storage cistern, boiler, steam water heater and feedwater and automatically controls
Device, heat-exchanger pump, water supply pump；The air intake of steam water heater is connected with the gland steam exhauster of heat supply back pressure machine；Chemically come between waterwheel
Demineralized water is that cold water one tunnel is connected with the cold water interface of steam water heater, the hot water outlet of steam water heater and boiler water inlet
It is connected, described cold water is stored in boiler after steam water heater heating, and the demineralized water chemically coming between waterwheel is that cold water is another
Road is connected with the water inlet of cold water storage cistern；The delivery port of cold water storage cistern is connected with the cold water end of feedwater automatic controller through water supply pump, cold
The cold water of water tank enters feedwater automatic controller, the delivery port of the boiler hot water end phase through heat-exchanger pump and the automatic controller that feeds water
Even, hot water is sent into feedwater automatic controller, the cold water of cold water storage cistern and the hot water of boiler pass through the automatic controller that feeds water, automatically
Adjust the inflow temperature entering Back-heating System of Heat Power Plant；Feed water automatic controller and the feed-water inlet end phase of Back-heating System of Heat Power Plant
Even；
The air intake of energy storage back pressure machine is connected with the gland steam exhauster of heat supply back pressure machine；The steam drain of energy storage back pressure machine and energy storage system
The vapor interface of the steam water heater of system is connected；Steam water heater hot water outlet end is connected with boiler.Chemically come between waterwheel
Demineralized water be that cold water is divided into two-way, a road is connected with the cold water interface of steam water heater, cold water and energy storage back pressure machine steam drain
Steam discharge be stored in boiler after steam water heater Hybrid Heating, chemically between waterwheel come demineralized water be cold water another road
It is connected with cold water storage cistern；The delivery port of cold water storage cistern is connected with the cold water end of feedwater automatic controller, and the cold water of cold water storage cistern enters feedwater
Automatic controller；The delivery port of boiler is connected with the hot water end of feedwater automatic controller, and hot water feeding feedwater is automatically controlled
Device；The hot water of the cold water of cold water storage cistern and boiler passes through the automatic controller that feeds water, and automatically adjusts and enters Back-heating System of Heat Power Plant
Inflow temperature；Feedwater automatic controller is connected with the feed-water inlet end of Back-heating System of Heat Power Plant.
Feedwater automatic controller is controlled to feedwater outlet temperature, and its operation principle is: when heat supply back pressure machine is in the external world
When thermic load is more than rated heating capacity during 95 DEG C of its feed temperature, feedwater automatic controller controls feed temperature at 95 DEG C；
When heat supply back pressure machine is less than the rated heating capacity of its feed temperature 20 DEG C (environment temperatures) in extraneous thermic load, feedwater is controlled automatically
Device processed controls feed temperature at 20 DEG C；Heat supply back pressure machine is less than the rated heating capacity of 95 DEG C of its feed temperature in extraneous thermic load
With more than 20 DEG C of its feed temperature rated heating capacity when, according to heat supply back pressure machine thermodynamic behaviour, in feedwater automatic controller
Middle set heat supply back pressure machine oepration at full load and mate the feed temperature of extraneous thermic load, and according to this set value calculation enter to
The hot water of water automatic controller and cool water quantity, reach this setting value so that the specified operation at full capacity of heat supply back pressure machine.
Back pressure machine heat supply, the heat supply energy storage method of energy-storage system comprise the steps:
1) back pressure machine delivers to the master of heat supply back pressure machine for the initial steam that produces of boiler of thermal sub-system by main steam line
Porthole import；Steam one tunnel after heat supply back pressure machine enters heat supply pipeline, enters after separately leading up to the little steam turbine of pneumatic pump
Low pressure oxygen-eliminating device；By the low pressure feed water end of low pressure oxygen-eliminating device after feed pump and auxiliary feed water pump, deliver to high-pressure heater；Warp
The hot water crossing high-pressure heater sends into boiler economizer, and the sewer of boiler enters periodical blowdown after continuous blowdown flash tank
Flash vessel；
2) in thermic load low ebb, back pressure machine is partially into energy storage back pressure machine, energy storage back pressure machine for the steam discharge of thermal sub-system
Steam discharge, by steam water heater, 20 DEG C of (environment temperature) demineralized waters that chemical water workshop comes is heated to after 95 DEG C and is stored in heat
In water tank；
3) when thermic load peak, energy storage back pressure machine is out of service, and feedwater automatic controller cuts out cold water end interface, now
The water entering therrmodynamic system is 95 DEG C of demineralized waters in boiler, reduces the quantity of steam that heat supply back pressure machine is used for backheat, improves and supply
The external heating load of hot back pressure machine；
4) in thermic load non-peak or low ebb, close energy storage back pressure machine, hot water end and cold connected by feedwater automatic controller
Water end (W.E.) interface, controls the water entering therrmodynamic system to be between 20 DEG C -90 DEG C so that the automatic adaptation of the displacement of heat supply back pressure machine is outer
Boundary's thermic load, reaches heat supply back pressure machine oepration at full load, improves calorific efficiency of heat power station and economic benefit.
In described step 2) in, feedwater automatic controller hot water end interface is closed, and the water entering therrmodynamic system is cold water storage cistern
In 20 DEG C of (environment temperature) demineralized waters, increase heat supply back pressure machine be used for backheat quantity of steam, reduce heat supply back pressure machine externally supply
Heat.
Advantages of the present invention: present system increase on the basis of former back pressure machine heating system energy storage back pressure machine, boiler,
Cold water storage cistern, steam water heater and feedwater automatic controller, in thermic load low ebb, the heating load of heat supply back pressure machine passes through this energy storage
System, is stored in boiler.When thermic load peak, the specified operation of heat supply back pressure machine, enter heat supply back pressure machine heat regenerative system
Feedwater be boiler in hot water, reduce heat supply back pressure machine steam discharge heat heat regenerative system steam consumption, increase external heat supply
Amount.For numerous steam power plant of China, especially there is the steam power plant of many pure back pressure machines, the amplitude of variation of thermic load is larger.For
The call that response national energy-saving reduces discharging, actively controls the coal-fired total amount of steam power plant, improves the operational efficiency of steam power plant's back pressure machine, the back of the body
Press heating steam energy-storage system has very big application value.
Brief description
Below with reference to accompanying drawing, the present invention is further described:
Fig. 1 is the back pressure machine heat supply of the present invention, energy-storage system schematic diagram.
Fig. 2 is the specific embodiment of the invention-summer typical case's day thermic load curve map；
Fig. 3 is the specific embodiment of the invention-winter typical case's day thermic load curve map.
In Fig. 1: 1, boiler, 2, heat supply back pressure machine, 3, the little steam turbine of pneumatic pump, 4, low pressure oxygen-eliminating device, 5, feed pump, 6, standby
Feed pump, 7, high-pressure heater, 8, continuous blowdown flash tank, 9, regular unloading container, 10, temperature-decreased pressure reducer, 11, the energy storage back of the body
Press, 12, boiler, 13, cold water storage cistern, 14, steam water heater, 15, feedwater automatic controller, 16, water supply pump, 17, heat-exchanger pump.
Specific embodiment
Referring to the drawings 1, a kind of present invention back pressure machine heat supply, energy-storage system include back pressure machine and supply thermal sub-system and energy storage subsystem
System；
Described back pressure machine for thermal sub-system include boiler 1, heat supply back pressure machine 2, the little steam turbine of pneumatic pump 3, low pressure oxygen-eliminating device 4,
Feed pump 5, auxiliary feed water pump 6, high-pressure heater 7, continuous blowdown flash tank 8, regular unloading container 9 and temperature-decreased pressure reducer
10；The venthole of boiler 1 is connected with the main inlet throttle-stop valve import of heat supply back pressure machine 2 by main steam line；The steam discharge of heat supply back pressure machine 2
Outlet is divided into two-way, and a road is connected with the heat supply mouth of pipe, and another road, after the little steam turbine of pneumatic pump 3, is connected with low pressure oxygen-eliminating device 4；
The low pressure feed water end of low pressure oxygen-eliminating device 4 is connected with high-pressure heater 7 import with auxiliary feed water pump 6 by feed pump 5；Hyperbaric heating
The hot water outlet of device 7 is connected with the water inlet of boiler 1, sends into boiler economizer, boiler 1 through the hot water of high-pressure heater 7
Sewage draining exit be connected with continuous blowdown flash tank 8；Continuous blowdown flash tank 8 sewage draining exit is connected with regular unloading container 9, continuously
Sewer in blowdown system 8 accesses regular unloading container 9.
Described energy storage subsystem includes energy storage back pressure machine 11, cold water storage cistern 13, boiler 12, steam water heater 14 and feedwater certainly
Movement controller 15, heat-exchanger pump 17, water supply pump 16；The demineralized water chemically coming between waterwheel is cold water one tunnel and steam water heater 14
Cold water interface is connected, and the hot water outlet of steam water heater 14 is connected with boiler 12 water inlet, and described cold water is in steam water heater
It is stored in boiler 12, the demineralized water chemically coming between waterwheel is the water inlet phase on another road of cold water and cold water storage cistern after 14 heating
Even；The delivery port of cold water storage cistern 13 is connected with the cold water end of feedwater automatic controller 15 through water supply pump 16, and the cold water of cold water storage cistern 13 enters
Enter to feed water automatic controller 15, and the delivery port of boiler 12 is connected with feedwater automatic controller 15 hot water end through heat-exchanger pump 17, will
Hot water sends into feedwater automatic controller 15, and the hot water of the cold water of cold water storage cistern 13 and boiler 12 passes through the automatic controller 15 that feeds water,
Automatically adjust the inflow temperature entering Back-heating System of Heat Power Plant；Feedwater automatic controller 15 is entered with the feedwater of Back-heating System of Heat Power Plant
Mouth end is connected；
The air intake of energy storage back pressure machine 11 is connected with the gland steam exhauster of heat supply back pressure machine 2；The steam drain of energy storage back pressure machine 11 with
The vapor interface of the steam water heater 14 of energy-storage system is connected；Steam water heater 14 hot water outlet end is connected with boiler 12.From
The demineralized water that chemical water workshop is come is that cold water is divided into two-way, and a road is connected with the cold water interface of steam water heater 14, cold water and storage
The steam discharge of energy back pressure machine 11 steam drain is stored in boiler 12 after steam water heater 14 Hybrid Heating, chemically comes between waterwheel
Demineralized water is that another road of cold water is connected with cold water storage cistern 13；The delivery port of cold water storage cistern 13 and the cold water end of feedwater automatic controller 15
It is connected, the cold water of cold water storage cistern 13 enters feedwater automatic controller 15；The delivery port of boiler 12 and feedwater automatic controller 15
Hot water end is connected, and hot water is sent into feedwater automatic controller 15；The hot water of the cold water of cold water storage cistern 13 and boiler 12 passes through feedwater
Automatic controller 15, automatically adjusts the inflow temperature entering Back-heating System of Heat Power Plant；Feedwater automatic controller 15 is returned with steam power plant
The feed-water inlet end of hot systems is connected.
Feedwater automatic controller 15 feedwater outlet temperature is controlled, its operation principle is: when heat supply back pressure machine 2 outside
When boundary's thermic load is more than rated heating capacity during 95 DEG C of its feed temperature, feedwater automatic controller 15 controls feed temperature 95
℃；When heat supply back pressure machine 2 is less than the rated heating capacity of its feed temperature 20 DEG C (environment temperatures) in extraneous thermic load, feedwater is certainly
Movement controller 15 controls feed temperature at 20 DEG C；Heat supply back pressure machine 2 is less than the volume of 95 DEG C of its feed temperature in extraneous thermic load
During the rated heating capacity determined heating load and be more than 20 DEG C of its feed temperature, according to heat supply back pressure machine thermodynamic behaviour, feeding water certainly
Set heat supply back pressure machine oepration at full load in movement controller 15 and mate the feed temperature of extraneous thermic load, and according to this setting value
Control the hot water entering feedwater automatic controller 15 and cool water quantity, reach this setting value so that heat supply back pressure machine is specified at full capacity
Run.
Back pressure machine heat supply, the heat supply energy storage method of energy-storage system comprise the steps:
1) back pressure machine delivers to heat supply back pressure machine 2 for the initial steam of boiler 1 generation of thermal sub-system by main steam line
Main inlet throttle-stop valve import；Steam one tunnel after heat supply back pressure machine 2 enters heat supply pipeline, after separately leading up to the little steam turbine of pneumatic pump 3
Enter low pressure oxygen-eliminating device 4；By the low pressure feed water end of low pressure oxygen-eliminating device 4 after feed pump 5 and auxiliary feed water pump 6, deliver to high pressure
Heater 7；Send into boiler economizer through the hot water of high-pressure heater 7, the sewer of boiler 1 is through continuous blowdown flash tank 8
Enter regular unloading container 9 afterwards；
2) in thermic load low ebb, back pressure machine is partially into energy storage back pressure machine 11, energy storage back pressure for the steam discharge of thermal sub-system
Machine 11 steam discharge, by steam water heater 14,20 DEG C of (environment temperature) demineralized waters that chemical water workshop comes is heated to after 95 DEG C and deposits
Storage is in boiler 12；
3) when thermic load peak, energy storage back pressure machine 11 is out of service, and feedwater automatic controller 15 cuts out cold water end interface,
The water now entering therrmodynamic system is 95 DEG C of demineralized waters in boiler 12, reduces the quantity of steam that heat supply back pressure machine 2 is used for backheat,
Improve the heat supply external heating load of back pressure machine 2；
4) in thermic load non-peak or low ebb, close energy storage back pressure machine 11, hot water end connected by feedwater automatic controller 15
With cold water end interface, the water entering therrmodynamic system is controlled to be between 20 DEG C -90 DEG C so that the displacement of heat supply back pressure machine 2 is automatic
Adapt to extraneous thermic load, reach heat supply back pressure machine 2 oepration at full load, improve calorific efficiency of heat power station and economic benefit.
In described step 2) in, feedwater automatic controller 15 hot water end interface is closed, and the water entering therrmodynamic system is cold water
20 DEG C of (environment temperature) demineralized waters in case 13, increase the quantity of steam that heat supply back pressure machine 2 is used for backheat, reduce heat supply back pressure machine 2
Externally heating load.
Referring to the drawings 2～3, because back pressure machine size, parameter species are a lot, the present invention is only with the thermic load of Yongxing steam power plant
To illustrate with back pressure machine, for other steam power plants and back pressure machine, it is in different size, but principle is the same.
The feature of Yongxing steam power plant heat supply back pressure machine and thermic load is: the maximum heating load in summer and winter is all higher than heat supply
The maximum heating load of back pressure machine 2；The minimum thermic load in summer and winter is respectively less than the rated heating capacity of heat supply back pressure machine 2.
When heat supply back pressure machine 2 rated generation power be 18mw, steam discharge 1.1mpa, 285.5 DEG C, enter therrmodynamic system be 20
During DEG C demineralized water, external heating load 160.38t/h；
When heat supply back pressure machine 2 rated generation power be 18mw, steam discharge 1.1mpa, 285.5 DEG C, enter therrmodynamic system be 95
During DEG C demineralized water, external heating load 180.43t/h；
When entrance heat regenerative system feed temperature brings up to 95 DEG C (boiler hot water temperature) by 20 DEG C (environment temperatures), heat supply
The specified external heating load of back pressure machine 2 can increase 20.05t/h.
Concrete theoretical calculation example:
Back pressure machine heat supply of the present invention, energy-storage system, both can be using energy storage back pressure machine it is also possible to not adopt energy storage back pressure machine
(flexibly switching), thermic load data is the Yongxing steam power plant actual heating load curve of 2014, and the data of heat supply back pressure machine is forever
The back pressure machine data of the existing unit of emerging thermoelectricity, energy storage back pressure machine data is the back pressure machine data that Hangzhou steam turbine plant provides.
(1) when, back pressure machine heat supply of the present invention, energy-storage system adopt energy storage back pressure machine, in night shift, heat supply back pressure machine 2
Steam discharge is partially into energy storage back pressure machine 11, energy storage back pressure machine 11 steam discharge, and 20 DEG C of demineralized waters that sweet-water tank is come are heated to 95
DEG C and be stored in boiler 12；When thermic load peak (day shift), energy storage back pressure machine 11 is out of service, enters therrmodynamic system
Water is 95 DEG C of demineralized waters in boiler, reduces the quantity of steam that heat supply back pressure machine 2 is used for backheat, improves heat supply back pressure machine 2 and externally supplies
Heat.
According to steam power plant's summer and winter thermic load characteristic curve, select energy storage back pressure machine.The feature of energy storage back pressure unit
Parameter be into vapour 1.1mpa, 285.5 DEG C, steam discharge 0.15mpa, 111.4 DEG C (Hang Qichang provide data).
Energy storage back pressure machine throttle flow and the determination principle of power: daytime the necessary hot water of heating load, by energy-storage system, entirely
Portion is heated to 95 DEG C.
Using energy storage back pressure machine, boiler heating steam adopts energy storage back pressure machine steam discharge, and heat Balance Calculation result is:
1st, during summer night shift thermic load low ebb, the necessary hot water of heating heating load on daytime, need energy storage back pressure machine back pressure to arrange
Vapour 0.15mpa, 111.4 DEG C of (about 123 DEG C of actual exhaust temperature) quantity of steams are evening 41.75t/h, generated output 3107kw.
Between 0-44.57t/h, it is 18mw that heat supply back pressure machine runs power to steam power plant's whole day temperature-decreased pressure reducer heat supply, heat
The external heating load of each hour of power plant is completely the same with extraneous thermic load；Steam power plant's whole day boiler load fluctuates in 198.36-
Between 241.64t/h, amplitude is 43.28t/h.
2nd, during winter night shift thermic load low ebb, the necessary hot water of heating heating load on daytime, need energy storage back pressure machine back pressure to arrange
Vapour 0.15mpa, 111.4 DEG C of quantity of steams are evening 55.19t/h, generated output 4462kw.
Steam power plant's whole day temperature-decreased pressure reducer heat supply between 0-69.57t/h, heat supply back pressure machine specified operation 18mw, thermoelectricity
The external heating load of each hour of factory is completely the same with extraneous thermic load；Steam power plant's whole day boiler load fluctuates in 203.14-
Between 259.12t/h, amplitude is 55.98t/h.
3rd, option and installment increases little back pressure machine newly is 4.5mw, both can in the winter time specified operation it is also possible in summer operation.
(2), back pressure machine heat supply of the present invention, in energy-storage system it is also possible to not adopt energy storage back pressure machine.When not adopting energy storage
During back pressure machine, in night shift (thermic load low ebb), heat supply back pressure machine 2 steam discharge, 20 DEG C of demineralized water heating that sweet-water tank is come
To 95 DEG C and be stored in boiler 12；In day shift (thermic load peak), the water entering therrmodynamic system is 95 in boiler 12
DEG C demineralized water, reduces the quantity of steam that heat supply back pressure machine 2 is used for backheat, improves the external heating load of heat supply back pressure machine 2.
Do not adopt energy storage back pressure machine, when boiler heats the steam discharge that steam adopts heat supply back pressure machine, heat Balance Calculation result
For:
1st, during summer night shift thermic load low ebb, the heating necessary hot water of heating load on daytime, need steam discharge 1.1mpa, 285.5
DEG C quantity of steam is 37.49t/h.The summer whole day temperature-decreased pressure reducer heat supply of steam power plant's whole day between 0-44.57t/h, transport by back pressure machine
Row power is between 17-18mw, and the external heating load of each hour of steam power plant is completely the same with extraneous thermic load；Steam power plant's whole day
Boiler load fluctuates between 199.48-237.32t/h, and amplitude is 37.84t/h.
2nd, during winter night shift thermic load low ebb, the heating necessary hot water of heating load on daytime, need steam discharge 1.1mpa, 285.5
DEG C quantity of steam is 49.56t/h.Temperature-decreased pressure reducer heat supply between 0-89.62t/h, back pressure machine specified operation 18mw, steam power plant is every
The external heating load of individual hour is completely the same with extraneous thermic load；Steam power plant's whole day boiler load fluctuates in 203.14-
Between 357.94t/h, amplitude is 154.8t/h.
Do not adopt energy storage back pressure machine, after enforcement, the substantially specified operation of heat supply back pressure machine, also reduce boiler load operation
Fluctuation, improves unit operation efficiency.
(3), 2 scheme economic indicator comparison sheets before and after energy storage
In back pressure machine heat supply of the present invention, energy-storage system, do not adopt energy storage back pressure machine and no energy storage using energy storage back pressure machine with
The Economic contrast of system see table:
Data display in above-mentioned table, the energy-storage system using energy storage back pressure machine is good in economic efficiency, obvious energy conservation.
(4), other effects of back pressure machine heat supply, energy-storage system
1st, boiler operatiopn:
Before energy storage, the evaporation capacity of summer boiler runs between 145.79-314.76t/h, the evaporation capacity of winter boiler
Run between 171-357.9t/h, boiler load fluctuation is larger, height load difference is 169-187t/h, combustion adjustment difficult and
Frequently；
After energy storage, the evaporation capacity of boiler summer runs between 198.4-241.6t/h, and the evaporation capacity of winter boiler exists
Run between 203.1-259.1t/h, boiler load fluctuation reduces, height load difference is 43.2-56t/h, run very steady,
And be easy to adjust；
2nd, original heat supply back pressure machine runs: before energy storage, the generated output of summer heat supply back pressure machine is in 11522-18000kw
Between run, heat supply back pressure machine exhaust temperature fluctuates between 285.5-302.8 DEG C；The generated output of Winter heat supply back pressure machine exists
Run between 14176-18000kw, heat supply back pressure machine exhaust temperature fluctuates between 285.5-295.8 DEG C.Back pressure machine load ripple
Dynamic, in underload, exhaust temperature raises, and economy declines；
After energy storage, the generated output of summer heat supply back pressure machine is 17466-18000kw and the sending out of Winter heat supply back pressure machine
Electrical power is rated power 18000kw, and heat supply back pressure machine exhaust temperature is essentially 285.5 DEG C of rated steam exhaust temperature, heat supply back pressure
The annual basic rated load operation of machine, fluctuate very little, and economy significantly improves.
3rd, after energy-storage system setting, in energy-storage system, setting system feedwater automatic controller, therrmodynamic system is fed water warm
Degree, between 20-95 DEG C, with the fluctuation adjust automatically (can be with adjustable range in 20-95 DEG C of heating load) of extraneous thermic load, makes
Obtain the specified operation of back pressure machine.
4th, the setting of back pressure machine heating steam energy-storage system is so that thermal power plant boiler whole year stable operation and original heat supply are carried on the back
The annual basic rated load operation of press, while improving economy, is very easy to the operation of steam power plant.
5th, the premise of the annual basicly stable operation of thermal power plant boiler and original heat supply back pressure machine whole year rated load operation is
Increased back pressure machine heating steam energy-storage system, when being configured with energy storage back pressure machine, energy storage back pressure machine is in night shift (thermic load low ebb
When) oepration at full load；On day shift (during thermic load peak), energy storage back pressure machine is out of service.Back pressure machine heating steam energy-storage system
Serve the effect adjusting steam power plant's original heat supply back pressure machine stable operation, energy storage back pressure machine serves and adjusting original heat supply back of the body
Generating effect when press runs is so that maximization of economic benefit.
Claims (4)
1. a kind of back pressure machine heat supply, energy-storage system it is characterised in that: include back pressure machine supply thermal sub-system and energy storage subsystem；
Described back pressure machine includes boiler, heat supply back pressure machine, the little steam turbine of pneumatic pump, low pressure oxygen-eliminating device, feed pump, standby for thermal sub-system
With feed pump, high-pressure heater, continuous blowdown flash tank, regular unloading container and temperature-decreased pressure reducer；The venthole of boiler leads to
Cross main steam line to be connected with the main inlet throttle-stop valve import of heat supply back pressure machine；The exhaust vent of heat supply back pressure machine is divided into two-way, a road with
The heat supply mouth of pipe is connected, and another road, after the little steam turbine of pneumatic pump, is connected with low pressure oxygen-eliminating device；The low pressure feed water end of low pressure oxygen-eliminating device
It is connected with inlet of high pressure heater with auxiliary feed water pump by feed pump；The hot water outlet of high-pressure heater and the water inlet of boiler
Mouth is connected, and sends into boiler economizer through the hot water of high-pressure heater, the sewage draining exit of boiler is connected with continuous blowdown flash tank；Even
Continuous blowdown system sewage draining exit is connected with regular unloading container, and the sewer in continuous blowdown flash tank accesses periodical blowdown and expands
Container；
Described energy storage subsystem includes energy storage back pressure machine, cold water storage cistern, boiler, steam water heater and feedwater automatic controller, heat
Water pump, water supply pump；The air intake of steam water heater is connected with the gland steam exhauster of heat supply back pressure machine；The demineralized water chemically coming between waterwheel
I.e. cold water one tunnel is connected with the cold water interface of steam water heater, and the hot water outlet of steam water heater is connected with boiler water inlet,
Described cold water is stored in boiler after steam water heater heating, and the demineralized water chemically coming between waterwheel is another Lu Yuleng of cold water
The water inlet of water tank is connected；The delivery port of cold water storage cistern is connected with the cold water end of feedwater automatic controller through water supply pump, cold water storage cistern
Cold water enters feedwater automatic controller, and the delivery port of boiler is connected with the hot water end of feedwater automatic controller through heat-exchanger pump, will
Hot water sends into feedwater automatic controller, and the cold water of cold water storage cistern and the hot water of boiler pass through the automatic controller that feeds water, automatically adjusts
Enter the inflow temperature of Back-heating System of Heat Power Plant；Feedwater automatic controller is connected with the feed-water inlet end of Back-heating System of Heat Power Plant；
The air intake of energy storage back pressure machine is connected with the gland steam exhauster of heat supply back pressure machine；The steam drain of energy storage back pressure machine and energy-storage system
The vapor interface of steam water heater is connected；Steam water heater hot water outlet end is connected with boiler；That chemically comes between waterwheel removes
Salt solution is that cold water is divided into two-way, and a road is connected with the cold water interface of steam water heater, the row of cold water and energy storage back pressure machine steam drain
Vapour is stored in boiler after steam water heater Hybrid Heating, and the demineralized water chemically coming between waterwheel is another Lu Yuleng of cold water
Water tank is connected；The delivery port of cold water storage cistern is connected with the cold water end of feedwater automatic controller, and the cold water of cold water storage cistern enters feedwater automatically
Controller；The delivery port of boiler is connected with the hot water end of feedwater automatic controller, and hot water is sent into feedwater automatic controller；Cold
The hot water of the cold water of water tank and boiler passes through the automatic controller that feeds water, and automatically adjust entrance Back-heating System of Heat Power Plant enters water temperature
Degree；Feedwater automatic controller is connected with the feed-water inlet end of Back-heating System of Heat Power Plant.
2. back pressure machine heat supply according to claim 1, energy-storage system it is characterised in that: feedwater automatic controller to feedwater
Outlet temperature is controlled, when the rated heating capacity when extraneous thermic load is more than 95 DEG C of its feed temperature for the heat supply back pressure machine,
Feedwater automatic controller controls feed temperature at 95 DEG C；When heat supply back pressure machine is less than 20 DEG C of its feed temperature in extraneous thermic load
Rated heating capacity when, feedwater automatic controller feed temperature is controlled at 20 DEG C；Heat supply back pressure machine is less than in extraneous thermic load
The rated heating capacity of 95 DEG C of its feed temperature and more than 20 DEG C of its feed temperature rated heating capacity when, according to heat supply back pressure machine heat
Mechanical characteristic, sets heat supply back pressure machine oepration at full load in feedwater automatic controller and mates the feedwater temperature of extraneous thermic load
Degree, and hot water and the cool water quantity of feedwater automatic controller is entered according to this set value calculation, reach this setting value so that heat supply is carried on the back
Press specified operation at full capacity.
3. the heat supply energy storage method of the back pressure machine heat supply described in claim 1 or 2, energy-storage system is it is characterised in that include as follows
Step:
1) back pressure machine delivers to the main inlet throttle-stop valve of heat supply back pressure machine for the initial steam that produces of boiler of thermal sub-system by main steam line
Import；Steam one tunnel after heat supply back pressure machine enters heat supply pipeline, enters low pressure after separately leading up to the little steam turbine of pneumatic pump
Oxygen-eliminating device；By the low pressure feed water end of low pressure oxygen-eliminating device after feed pump and auxiliary feed water pump, deliver to high-pressure heater；Through too high
The hot water of pressure heater sends into boiler economizer, and the sewer of boiler enters periodical blowdown dilatation after continuous blowdown flash tank
Device；
2) in thermic load low ebb, back pressure machine is partially into energy storage back pressure machine for the steam discharge of thermal sub-system, energy storage back pressure machine steam discharge,
By steam water heater, 20 DEG C of demineralized waters that chemical water workshop comes are heated to after 95 DEG C and are stored in boiler；
3) when thermic load peak, energy storage back pressure machine is out of service, and feedwater automatic controller cuts out cold water end interface, now enters
The water of therrmodynamic system is 95 DEG C of demineralized waters in boiler, reduces the quantity of steam that heat supply back pressure machine is used for backheat, improves heat supply and uses
The external heating load of back pressure machine；
4) in thermic load non-peak or low ebb, close energy storage back pressure machine, feedwater automatic controller connects hot water end and cold water end
Interface, controls the water entering therrmodynamic system to be between 20 DEG C -90 DEG C so that the displacement of heat supply back pressure machine adapts to extraneous heat automatically
Load, reaches heat supply back pressure machine oepration at full load, improves calorific efficiency of heat power station and economic benefit.
4. back pressure machine heat supply according to claim 3, energy-storage system heat supply energy storage method it is characterised in that: described
Step 2) in, feedwater automatic controller hot water end interface is closed, and the water entering therrmodynamic system is 20 DEG C of demineralized waters in cold water storage cistern,
Increase the quantity of steam that heat supply back pressure machine is used for backheat, reduce the external heating load of heat supply back pressure machine.
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| CN106089338B (en) * | 2016-06-03 | 2018-09-14 | 东南大学 | A kind of back pressure machine association system and method adjusting heat supply and power generation |
| CN106989433A (en) * | 2017-03-30 | 2017-07-28 | 德清县中能热电有限公司 | A kind of tide heat reservoir and tide heat supply method |
| CN109184831B (en) * | 2018-10-17 | 2023-10-20 | 中国船舶重工集团公司第七0三研究所 | Energy supply side multi-energy switching and decoupling type heat energy storage multi-energy supply system |
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| CN204404317U (en) * | 2015-01-08 | 2015-06-17 | 中国能源建设集团山西省电力勘测设计院有限公司 | Wet type cooling unit high back pressure series connection compression type heat heat pump heating system |
| CN205013067U (en) * | 2015-09-21 | 2016-02-03 | 东南大学建筑设计研究院有限公司 | Heat supply of backpressure machine, energy storage system |
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