CN108167035B - A kind of thermoelectricity cooperative system and method adjusted based on reheating accumulation of heat - Google Patents
A kind of thermoelectricity cooperative system and method adjusted based on reheating accumulation of heat Download PDFInfo
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- CN108167035B CN108167035B CN201711251281.8A CN201711251281A CN108167035B CN 108167035 B CN108167035 B CN 108167035B CN 201711251281 A CN201711251281 A CN 201711251281A CN 108167035 B CN108167035 B CN 108167035B
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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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
- F01K17/025—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic in combination with at least one gas turbine, e.g. a combustion gas turbine
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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steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating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
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
- F24D1/06—Steam central heating systems operating with superheated steam
-
- 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
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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
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Abstract
The invention discloses a kind of thermoelectricity cooperative systems and method adjusted based on reheating accumulation of heat, including high-pressure turbine, mesolow steam turbine, generator, boiler, boiler, accumulation of heat steam small pump；Reheating accumulation of heat bypass, storage heater, heating plant, extraction for heat supply branch, accumulation of heat steam supply branch, accumulation of heat steam supply control valve, reheating accumulation of heat bypass valve, reheater, reheat branch, hot water heating pump, hot water heating branch, hot water user.The logical present invention of the present invention solve the problems, such as to a certain extent Conventional thermoelectric unit according to electricity determining by heat or with occur during the caused peak regulation of the fixed heat of electricity can not thermoelectricity take into account, realize the superfluous problem that generates electricity under the premise of meeting the needs of hot, also solve the problems, such as that heat demand is insufficient in the case of meeting power generation requirements, especially hot steam demand the problem of, the heat and power system effect for improving unit, has a good application prospect.
Description
Technical field
The present invention relates to cogeneration of heat and power and heat storage technologies more particularly to a kind of thermoelectricity adjusted based on reheating accumulation of heat to cooperate with system
System and method.
Background technique
Cogeneration of heat and power technology is to improve one of the effective way of generating set economy, moreover, as China's new energy is sent out
The proportion in electric market is constantly promoted, and the requirement that conventional power plants participate in peak regulation is higher and higher, however, due to Demand-side thermoelectricity
The mismatch that demand and peak regulation require, frequently can lead to supply and demand can not match, in particular for the matching answered.How peak regulation with
And in the case where changes in market demand, realize the collaboration of better thermoelectricity, be current thermoelectricity unit efficiently, the weight that faces of economical operation
Want contradiction.
Energy storage technology can be very good to solve energy over time and space as a kind of traditional and emerging technology
Problem of misalignment, using energy storage technology, can be very good to solve energy resource supply end and demand end cooperates with matching problem.In order to solve
Insufficient problem of the overstock problem and heat demand of electric power during peak regulation in moment, Chinese patent ZL
201710213036.1, ZL 201610528383.9,201710051543.X and 201611166467.9 equal parts do not propose storage
The methods of heat solves the above problems, wherein the particular technique method used includes direct storage hot water, the direct accumulation of heat of heat supply network, electricity
The method of heating boiler accumulation of heat.
It is worth noting that although existing technology can solve heat demand deficiency using energy storage technology to a certain extent
The problem of, to achieve the effect that thermoelectricity cooperates with.But still have Railway Project to need to solve: (1) heat user is to high-grade steaming
Vapour requires to be unable to get solution, and existing technology is only with the technical solution of storage hot water, and the grade of thermal energy is lower, the field of occupancy
Ground is larger, is unable to satisfy the demand of the user required for a long time and to high-grade steam.(2) electric energy is stored directly to meet heat
The demand of energy has feasibility economically under the conditions of specialized market, and the peak valley that can effectively adjust electricity consumption is special
Sign reaches thermoelectricity collaboration, but it is the thermoelectricity collaboration realized in user side, rather than in energy supply side, cost or higher.
Therefore, thermoelectricity collaboration and raising economy of energy supply side (unit side) in the case where complicated energy supply requires feature how to be realized
Problem be the key that current thermoelectricity unit efficiently, economical operation.
Summary of the invention
It is an object of the invention to overcome the above problem, provide it is a kind of based on reheating accumulation of heat adjust thermoelectricity cooperative system and
Method.
To achieve the above object, the invention adopts the following technical scheme:
Based on the thermoelectricity cooperative system that reheating accumulation of heat is adjusted, including high-pressure turbine, mesolow steam turbine, generator, pot
Furnace, boiler, accumulation of heat steam small pump；Reheating accumulation of heat bypass, storage heater, heating plant, extraction for heat supply branch, accumulation of heat steam supply branch
Road, accumulation of heat steam supply control valve, reheating accumulation of heat bypass valve, reheater, reheat branch, hot water heating pump, hot water heating branch, hot water
User.High-pressure turbine, mesolow steam turbine, generator are sequentially connected with, and high-pressure turbine exports in reheated branch and boiler
Reheater and mesolow Steam Turbine Through IP Admission entrance be sequentially connected with, the outlet of the intermediate pressure cylinder of mesolow steam turbine passes through extraction for heat supply
Branch is connected with heating plant；Reheat branch between reheater outlet and mesolow Steam Turbine Through IP Admission entrance passes through thermal regenerator again
Bypass is sequentially connected with storage heater and boiler, and the entrance of reheating accumulation of heat bypass is equipped with reheating accumulation of heat bypass valve；Boiler is through storing
Hot steam small pump is connected with storage heater, and is connected to extraction for heat supply branch by accumulation of heat steam supply branch and is connected again with heating plant,
The outlet of accumulation of heat steam supply branch is equipped with accumulation of heat steam supply control valve；It is connected between boiler and hot water user by hot water heating branch,
Hot water heating branch road is equipped with hot water heating pump.
The heat-storing material of the storage heater includes phase change heat storage material or sensible heat heat-storing material；Phase change heat storage material includes
Fused salt, sensible heat heat-storing material include graphite, aluminium oxide or cast iron.
The high-pressure turbine, mesolow steam turbine are also possible to the high pressure cylinder and mesolow cylinder of a steam turbine, should
Steam turbine can be back pressure machine and be also possible to take out solidifying machine.
It is specific as follows using the thermoelectricity Synergistic method of the thermoelectricity cooperative system adjusted based on reheating accumulation of heat:
When thermoelectricity unit by reduce boiler load adjust steam extraction amount on the basis of, still there is the case where power surplus
Under, by opening reheating accumulation of heat bypass valve, a part of reheated steam is further separated into storage heater, passes through condensing heat-exchange, reheated steam
Topography storage heater is discharged, so that the temperature of storage heater increases accumulation of heat, condensation hot water flows into hot water by reheating accumulation of heat bypass
Case is stored.By storing a part of reheated steam energy, reduce reheated steam generated energy, in the case of Lai Shixian power surplus
Thermoelectricity collaboration.
When thermoelectricity unit by reduce boiler load adjust steam extraction amount on the basis of, still there is heat demand and be not achieved
In the case where satisfaction, accumulation of heat steam supply control valve is opened, the hot water in boiler is sent into storage heater and heated by accumulation of heat steam small pump
Superheated steam is generated, enters extraction for heat supply branch by accumulation of heat steam supply branch, it is insufficient to eventually enter into heating plant supplement extraction for heat supply
Operating condition.When there is hot water demand, hot water heating pump condensation hot water can be directly opened through hot water heating branch and is transported to hot water user,
Realize the thermoelectricity collaboration under the conditions of heat supply is insufficient.
Compared with prior art, main advantages of the present invention are:
(1) present invention proposes to adjust to a greater extent in ratio to realize by the distribution for adjusting reheated steam in conjunction with storage heater
Thermoelectricity ratio is saved, the adjustable range of thermoelectricity collaboration is on the one hand improved, improves existing unit heat and power system effect；On the other hand
High-grade thermal energy is stored, the supply in the case where heat demand is inadequate of hot steam is realized.
(2) present invention passes through the reasonable utilization of storage heater and hot-water cylinder, can satisfy the storage and confession of different grade thermal energy
It answers, realizes the step storage and counterpart supply of thermal energy.
(3) present invention takes up little area, is easily installed since its unit volume energy storage density is higher than water storage using hold over system,
Cost of investment is lower.
Detailed description of the invention
Fig. 1 is a kind of thermoelectricity cooperative system schematic diagram adjusted based on reheating accumulation of heat；
In figure: high-pressure turbine 1, mesolow steam turbine 2, generator 3, boiler 4, boiler 5, accumulation of heat steam small pump 6；
Reheating accumulation of heat bypass 7, storage heater 8, heating plant 9, extraction for heat supply branch 10, accumulation of heat steam supply branch 11, accumulation of heat steam supply control valve 12,
Reheating accumulation of heat bypass valve 13, reheater 14, reheat branch 15, hot water heating pump 16, hot water heating branch 17, hot water user 18.
Specific embodiment
As shown in Figure 1, a kind of thermoelectricity cooperative system adjusted based on reheating accumulation of heat, including high-pressure turbine 1, mesolow vapour
Turbine 2, generator 3, boiler 4, boiler 5, accumulation of heat steam small pump 6；Reheating accumulation of heat bypass 7, storage heater (8), heating plant 9,
Extraction for heat supply branch 10, accumulation of heat steam supply branch 11, accumulation of heat steam supply control valve 12, reheating accumulation of heat bypass valve 13, reheater 14, reheating
Branch 15, hot water heating pump 16, hot water heating branch 17, hot water user 18.High-pressure turbine 1, mesolow steam turbine 2, power generation
Machine 3 is sequentially connected with, and high-pressure turbine 1 exports presses in reheated branch 15 and the reheater 14 and mesolow steam turbine 2 in boiler 4
Cylinder entrance is sequentially connected with, and the intermediate pressure cylinder outlet of mesolow steam turbine 2 is connected by extraction for heat supply branch 10 with heating plant 9；Reheating
Device 14 outlet 2 intermediate pressure cylinder entrance of mesolow steam turbine between reheat branch 15 by reheating accumulation of heat bypass 7 with storage heater 8 and
Boiler 5 is sequentially connected with, and the entrance of reheating accumulation of heat bypass 7 is equipped with reheating accumulation of heat bypass valve 13；Boiler 5 is through accumulation of heat steam moisturizing
Pump 6 is connected with storage heater 8, and is connected to extraction for heat supply branch 10 by accumulation of heat steam supply branch 11 and is connected again with heating plant 9, accumulation of heat
The outlet of steam supply branch 11 is equipped with accumulation of heat steam supply control valve 12；Pass through hot water heating branch 17 between boiler 5 and hot water user 18
Connection, hot water heating branch 17 are equipped with hot water heating pump 16.
The heat-storing material of the storage heater 8 includes phase change heat storage material or sensible heat heat-storing material；Phase change heat storage material packet
Fused salt is included, sensible heat heat-storing material includes graphite, aluminium oxide or cast iron.
The high-pressure turbine 1, mesolow steam turbine 2 are also possible to the high pressure cylinder and mesolow cylinder of a steam turbine,
The steam turbine can be back pressure machine and be also possible to take out solidifying machine.
It is specific as follows using the thermoelectricity Synergistic method of above-mentioned thermoelectricity cooperative system adjusted based on reheating accumulation of heat:
When thermoelectricity unit by reduce boiler load adjust steam extraction amount on the basis of, still there is the case where power surplus
Under, by opening reheating accumulation of heat bypass valve 13, a part of reheated steam is further separated into storage heater 8, and by condensing heat-exchange, reheating is steamed
Vapour discharges Topography storage heater 8, so that the temperature of storage heater 8 increases accumulation of heat, condensation hot water is flowed by reheating accumulation of heat bypass 7
Boiler 5 is stored.By storing a part of reheated steam energy, reduce reheated steam generated energy, Lai Shixian power surplus
In the case of thermoelectricity collaboration.
When thermoelectricity unit by reduce boiler load adjust steam extraction amount on the basis of, still there is heat demand and be not achieved
In the case where satisfaction, accumulation of heat steam supply control valve 12 is opened, the hot water in boiler 5 is sent into storage heater 8 by accumulation of heat steam small pump 6
Heating generates superheated steam, enters extraction for heat supply branch 10 by accumulation of heat steam supply branch 11, eventually enters into heating plant 9 and supplements steam extraction
Heat supply deficiency operating condition.When there is hot water demand, it is defeated through hot water heating branch 17 can directly to open 16 condensation hot water of hot water heating pump
It is sent to hot water user 18, realizes the thermoelectricity collaboration under the conditions of heat supply is insufficient.
The course of work of solar heat pump and water heating system is as follows:
Under accidental conditions, the main steam in boiler 4 successively flows into high-pressure turbine 1, mesolow steam turbine 2, high pressure
A part of steam that steam turbine 1 exports flows back to 14 reheating of reheater at flowing into mesolow again after superheated steam by reheat branch 15
2 intermediate pressure cylinder of steam turbine, completes reheat vapor cycle, and steam turbine drives generator 3 to generate electricity under the promotion of main steam and reheated steam
At power generation process.At the same time, the outlet of 2 intermediate pressure cylinder of mesolow steam turbine enters heat supply by extraction for heat supply branch 10 by steam extraction
Stand 9 complete heat supplying processes.
When thermoelectricity unit by reduce boiler load adjust steam extraction amount on the basis of, still there is the case where power surplus
Under, by opening reheating accumulation of heat bypass valve 13, a part of reheated steam is further separated into storage heater 8, and by condensing heat-exchange, reheating is steamed
Vapour discharges Topography storage heater 8, so that the temperature of storage heater 8 increases accumulation of heat, condensation hot water is flowed by reheating accumulation of heat bypass 7
Boiler 5 is stored.By storing a part of reheated steam energy, reduce reheated steam generated energy, Lai Shixian power surplus
In the case of thermoelectricity collaboration.
When thermoelectricity unit by reduce boiler load adjust steam extraction amount on the basis of, still there is heat demand and be not achieved
In the case where satisfaction, accumulation of heat steam supply control valve 12 is opened, the hot water in boiler 5 is sent into storage heater 8 by accumulation of heat steam small pump 6
Heating generates superheated steam, enters extraction for heat supply branch 10 by accumulation of heat steam supply branch 11, eventually enters into heating plant 9 and supplements steam extraction
Heat supply deficiency operating condition.When there is hot water demand, it is defeated through hot water heating branch 17 can directly to open 16 condensation hot water of hot water heating pump
It is sent to hot water user 18, realizes the thermoelectricity collaboration under the conditions of heat supply is insufficient.
The present invention solves Conventional thermoelectric unit according to electricity determining by heat or caused by the fixed heat of electricity to a certain extent
Occur during peak regulation can not thermoelectricity the problem of taking into account, realize the problem for the surplus that generates electricity under the premise of meeting the needs of hot,
Heat demand is insufficient in the case of solving the problems, such as to meet power generation requirements, especially hot steam demand the problem of.
Claims (4)
1. a kind of thermoelectricity cooperative system adjusted based on reheating accumulation of heat, it is characterised in that including high-pressure turbine (1), mesolow vapour
Turbine (2), generator (3), boiler (4), boiler (5), accumulation of heat steam small pump (6)；Reheating accumulation of heat bypasses (7), storage heater
(8), heating plant (9), extraction for heat supply branch (10), accumulation of heat steam supply branch (11), accumulation of heat steam supply control valve (12), by reheating accumulation of heat
Road valve (13), reheater (14), reheat branch (15), hot water heating pump (16), hot water heating branch (17), hot water user
(18)；High-pressure turbine (1), mesolow steam turbine (2), generator (3) are sequentially connected with, and high-pressure turbine (1) outlet is reheated
Branch (15) in boiler (4) reheater (14) and mesolow steam turbine (2) intermediate pressure cylinder entrance be sequentially connected with, mesolow steamer
The intermediate pressure cylinder outlet of machine (2) is connected by extraction for heat supply branch (10) with heating plant (9)；Reheater (14) outlet and mesolow vapour
Reheat branch (15) between turbine (2) intermediate pressure cylinder entrance passes through reheating accumulation of heat bypass (7) and storage heater (8) and boiler (5)
It is sequentially connected with, the entrance that reheating accumulation of heat bypasses (7) is equipped with reheating accumulation of heat bypass valve (13)；Boiler (5) is through accumulation of heat steam moisturizing
Pump (6) be connected with storage heater (8), and pass through accumulation of heat steam supply branch (11) be connected to extraction for heat supply branch (10) again with heating plant
(9) it is connected, accumulation of heat steam supply branch (11) outlet is equipped with accumulation of heat steam supply control valve (12)；Boiler (5) and hot water user (18) it
Between by hot water heating branch (17) connect, hot water heating branch (17) be equipped with hot water heating pump (16).
2. a kind of thermoelectricity cooperative system adjusted based on reheating accumulation of heat according to claim 1, it is characterised in that described
The heat-storing material of storage heater (8) includes phase change heat storage material and/or sensible heat heat-storing material；The phase change heat storage material includes molten
Salt, the sensible heat heat-storing material include graphite, aluminium oxide or cast iron.
3. a kind of thermoelectricity cooperative system adjusted based on reheating accumulation of heat according to claim 1, it is characterised in that described
High-pressure turbine (1), mesolow steam turbine (2) are the high pressure cylinder and mesolow cylinder of a steam turbine, which is back pressure machine
Or take out solidifying machine.
4. a kind of thermoelectricity Synergistic method adjusted based on reheating accumulation of heat using thermoelectricity cooperative system as described in claim 1,
It is characterized in that:
In the case that still there is power surplus on the basis of adjusting steam extraction amount by reducing boiler load in thermoelectricity unit,
By opening reheating accumulation of heat bypass valve (13), a part of reheated steam is further separated into storage heater (8), passes through condensing heat-exchange, reheating
Steam discharges Topography storage heater (8), so that the temperature of storage heater (8) increases accumulation of heat, condensation hot water passes through by reheating accumulation of heat
Road (7) flows into boiler (5) and is stored；By storing a part of reheated steam energy, reduces reheated steam generated energy, come real
Thermoelectricity collaboration in the case of existing power surplus；
When thermoelectricity unit by reduce boiler load adjust steam extraction amount on the basis of, still there is heat demand and satisfaction be not achieved
In the case where, it opens accumulation of heat steam supply control valve (12), the hot water in boiler (5) is sent into accumulation of heat by accumulation of heat steam small pump (6)
Device (8) heating generates superheated steam, enters extraction for heat supply branch (10) by accumulation of heat steam supply branch (11), eventually enters into heating plant
(9) extraction for heat supply deficiency operating condition is supplemented；When there is hot water demand, hot water heating pump (16) condensation hot water can be directly opened through hot water
Heat supply branch (17) is transported to hot water user (18), realizes the thermoelectricity collaboration under the conditions of heat supply is insufficient.
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| CN108921441A (en) * | 2018-07-11 | 2018-11-30 | 南方电网科学研究院有限责任公司 | A kind of control method, device, equipment and the medium of comprehensive energy energy supplying system |
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| CN110966588B (en) * | 2019-12-20 | 2020-09-22 | 浙江大学 | Boiler-steam turbine load adjusting system and method based on heat storage |
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