CN110529209B - Solar photo-thermal heat storage system and method for deep peak shaving of cogeneration unit - Google Patents
Solar photo-thermal heat storage system and method for deep peak shaving of cogeneration unit Download PDFInfo
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- CN110529209B CN110529209B CN201910613234.6A CN201910613234A CN110529209B CN 110529209 B CN110529209 B CN 110529209B CN 201910613234 A CN201910613234 A CN 201910613234A CN 110529209 B CN110529209 B CN 110529209B
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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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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Abstract
The invention relates to a solar photo-thermal heat storage system and a method for deep peak regulation of a cogeneration unit, wherein a solar photo-thermal heater and a hot water heat storage tank system are arranged in a thermal power unit system, the solar photo-thermal heater is used for heating circulating water cold water of a heat supply network in a non-peak regulation period, the part with insufficient heating can be used for extracting steam exhausted from a pressure cylinder in the unit, the heat supply network heat exchanger is used for heating the cold water of the heat supply network, the heated water is stored in the hot water storage tank, and the hot water in the hot water storage tank is supplied to a primary network system of the heat supply network in a period needing to participate in the deep peak regulation, so that the deep peak regulation is realized, the power generation load is reduced, and the continuous and stable operation of the unit is ensured. In the whole peak shaving process, the solar photo-thermal heating technology and the hot water heat storage technology are applied, the capacity of the unit for peak shaving on line is improved, the unit operation energy consumption is saved, and the dilemma of cleaning the energy consumption is effectively relieved.
Description
Technical Field
The invention belongs to the technical field of electric power energy, and particularly relates to a solar photo-thermal heat storage system and method for deep peak shaving of a cogeneration unit.
Background
In recent years, the increase in energy demand and the exhaustion of fossil energy have led to rapid development of renewable resource-related technologies. In the aspect of electric power, wind power and photovoltaic power are continuously and rapidly developed, but technical problems such as serious wind abandoning and light abandoning also commonly exist. One of the main factors causing the problems of wind abandoning and light abandoning is the limit of wind power and photovoltaic absorption capacity. The absorption becomes a key factor for restricting the development of domestic wind power and photovoltaic and the situation is increasingly severe. The method solves the problems of wind power and photovoltaic consumption, and can take measures from the aspects of improving the power peak regulation capacity, adjusting the wind power and photovoltaic layout, strengthening the power grid mutual aid, load side management and the like. Especially in northeast regions with serious wind abandonment, the flexible power supply is relatively short, the flexibility of partial thermal power generating units is improved, the deep peak regulation potential is dug deeply, and the method becomes a key measure with the most practical significance for improving the peak regulation capacity and the new energy consumption capacity of the system.
In addition, in the three north areas of China, the specific gravity of a cogeneration unit is high, the peak-adjustable power supplies such as hydropower and a straight condensing unit are scarce, and the peak-adjusting difficulty is the most prominent problem in the operation of a power grid. Taking the northeast power grid as an example, in the current power supply structure, thermal power accounts for 65% of the total installed power, wind power accounts for 25% of the total installed power, and the nuclear power generating units are also put into operation successively. In the heating period in winter, the operation capacity of the cogeneration unit accounts for 70% of the total operation capacity of the thermal power unit, the cogeneration unit operates in a mode of 'fixing power by heat', and the peak regulation capacity is only about 10%, so that the problem of wind power consumption is more prominent. The above situation causes difficulties in peak regulation of the northeast power grid, resulting in three serious consequences: firstly, the off-peak power balance of the power grid is difficult, the dispatching pressure is huge, and the safe operation risk of the power grid is increased; secondly, the power grid has serious insufficient capability of absorbing new energy such as wind power, photoelectricity and nuclear power, the problem of wind abandonment is very prominent, and the energy conservation and emission reduction and energy structure transformation and upgrading of regions are not facilitated; thirdly, contradiction between peak shaving of the power grid and heat supply of the cogeneration unit is prominent, which affects heating safety of residents in winter and causes the risk of causing civil problems.
The northeast regulatory agency of the national energy agency issues "northeast power peak shaving auxiliary service market regulatory approaches" (trial runs) (northeast regulatory market No. [2014] 374) and executes it from 10/1 of 2014. The northeast energy regulatory agency of 3 months in 2016 issues a < northeast power peak regulation auxiliary service market regulatory approach (trial) > supplement regulation), "the northeast power auxiliary service market operating rule (temporary) (northeast regulatory market [2018] 220") issued by the northeast energy regulatory agency of 12 months in 2018, and the regulations revise the paid peak regulation reference and the peak regulation compensation grade, wherein the most obvious change is that the compensation gap between the common peak regulation and the deep peak regulation is opened.
National policies are gradually increasing the compensation force for the peak regulation capability of the thermal power generating unit; meanwhile, when the thermal power generating unit is required to adjust the peak of the power grid, the heat supply quality of residents must be guaranteed, and the difficulty of adjusting the peak of the thermal power generating unit is further increased. Therefore, how to effectively perform peak shaving of the power of the thermal power generating unit and load peak shaving and valley filling of the heat supply network so as to ensure the quality of heat supply is a crucial problem to be solved urgently for the thermal power plant. The energy technology innovation is accelerated, the peak regulation potential of a coal-fired unit is exploited, the thermal power operation flexibility of China is improved, the system peak regulation and new energy consumption capabilities are comprehensively improved, the thermal power flexibility improvement is fully exerted, the system peak regulation capability is improved, a clean, low-carbon, safe and efficient modern energy system is established, and the energy structure adjustment of China is promoted. Is an important content for promoting the construction of a high-efficiency intelligent clean power system in China.
In the prior art, a thermal power flexibility modification technology mainly aims at the aspects of deep peak regulation (low-power load operation), slope climbing speed improvement, quick start and stop, fuel flexibility and the like. The corresponding solutions are:
1. thermoelectric decoupling: by adding the large-scale heat storage system, heat of the heat storage device participates in heat supply in the period of difficult peak regulation, and heat shortage is avoided; and storing surplus or new energy heat during the period with allowance for peak shaving. The heat accumulating boiler has mainly heat accumulating tank, electric heating boiler, high and low pressure by-pass steam pumping, pressure reducing, low pressure cylinder with less steam and no load operation, etc.
2. Low-load denitration: a water supply bypass, a flue gas bypass, an economizer classification, an economizer hot water recycling technology and the like.
3. Optimizing the control strategy of the burner and the water supply flow, improving the load regulation rate: ion burners, flame monitors, coal mill modifications, and the like.
4. And (3) adding stable combustion equipment: oil-free ignition, tiny-oil ignition and the like.
5. Steam turbine transformation: the bypass of the steam turbine is subjected to temperature and pressure reduction, the low-pressure cylinder is modified and the like.
Although the above technology can achieve a certain peak regulation effect, the purpose of deep peak regulation cannot be achieved due to the safety problems of boilers, steam engines and the like. For example, the electric boiler technology only carries out internal consumption on the electric load and then converts the electric load into heat supply, and energy is not saved; the low-load operation can cause the excessive emission of system equipment such as desulfurization and denitrification. Meanwhile, in the existing steam extraction heat supply power plant, the problem of heat supply waste or insufficient heat supply exists when the peak regulation system carries out electric power peak regulation.
Disclosure of Invention
The invention aims to provide a solar photo-thermal heat storage system and a method for deep peak shaving of a cogeneration unit, which realize deep peak shaving on the basis of ensuring continuous and stable operation of the unit and increasing new energy consumption.
The invention provides a solar photo-thermal heat storage system for deep peak shaving of a cogeneration unit, which comprises a solar photo-thermal heater and a hot water storage tank, wherein the solar photo-thermal heater and the hot water storage tank are arranged in the cogeneration unit;
the lower cold water outlet of the hot water storage tank is connected with the water inlet of the solar photo-thermal heater and the water inlet of the heat supply network heater and used for supplying circulating water cold water of the heat supply network to the solar photo-thermal heater and the heat supply network heater;
the upper hot water inlet of the hot water storage tank is connected with the water outlet of the solar photo-thermal heater and the water outlet of the heat supply network heater and is used for storing water heated by the solar photo-thermal heater and the heat supply network heater to the upper part of the hot water storage tank;
the hot water storage tank is connected with the primary pipe network and is used for supplying hot water to the primary pipe network;
the intermediate pressure cylinder is connected with a steam inlet of the heat supply network heater through a steam exhaust pipeline and is used for heating circulating water cold water of the heat supply network through steam;
the solar photo-thermal heater is used for heating circulating water cold water of the heat supply network in a non-deep peak regulation period, the insufficient part is heated by extracting steam exhausted by the intermediate pressure cylinder, the circulating water cold water of the heat supply network is heated by the heat supply network heat exchanger, and the heated water is stored in the heat storage water tank;
the heat storage water tank is used for supplying hot water in the heat storage water tank to a primary pipe network in a deep peak regulation period so as to reduce the heat supply steam extraction amount of the medium pressure cylinder exhaust steam and realize thermoelectric decoupling.
Furthermore, the water inlets of the solar photo-thermal heater and the heat supply network heater are respectively provided with a solar photo-thermal system circulating water pump and a heat supply network circulating water pump for adjusting the water inflow.
Further, the hot water storage tank is a normal-pressure inclined temperature layer heat storage tank.
Furthermore, the upper part and the lower part of the hot water storage tank are provided with stable water distributors for adjusting and controlling the thermocline in the hot water storage tank.
Further, the cogeneration unit still includes low pressure jar, condenser, oxygen-eliminating device, low pressure feed water heater, smart treater, the low pressure jar with intermediate pressure jar and condenser are connected, condenser, smart treater, low pressure feed water heater, oxygen-eliminating device connect gradually, the oxygen-eliminating device with the heat supply network heater is connected.
The invention also provides a deep peak shaving method of the cogeneration unit, which comprises the following steps:
a solar photo-thermal heater and a hot water storage tank are arranged in the cogeneration unit;
in the non-deep peak regulation period, a solar photo-thermal heater is used for heating circulating water cold water of a heat supply network, part of steam exhausted by a pressure cylinder in the unit is extracted when the heat is insufficient and is supplied to a heat supply network heat exchanger, the circulating water cold water of the heat supply network is heated by the heat supply network heat exchanger, and the heated water is stored in a water storage tank;
at the degree of depth peak regulation period, according to the characteristic of combined heat and power generation unit, along with the reduction of generated power, the unit heat supply load also correspondingly reduces, supplies the hot water in the heat storage water tank to a pipe network this moment, and the heat supply load of not enough is supplemented by the heat storage water tank, realizes thermoelectric decoupling zero.
By means of the scheme, the solar photo-thermal heat storage system and the method for deep peak regulation of the cogeneration unit can realize deep peak regulation on the basis of ensuring continuous and stable operation of the unit and increasing new energy consumption.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a solar photo-thermal heat storage system for deep peak shaving of a cogeneration unit.
Reference numbers in the figures:
1-a medium pressure cylinder; 2-low pressure cylinder; 3-a condenser; 4-a deaerator; 5-a low-pressure heater; 6-a fine processor; 7-a heating network heater; 8-a water distributor; 9-a hot water storage tank; 10-primary pipe network; 11-solar photo-thermal heater; 12-heat supply network circulating water pump; 13-circulating water pump of solar photo-thermal system.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1, the embodiment provides a solar photo-thermal heat storage system for deep peak shaving of a cogeneration unit, which includes an intermediate pressure cylinder 1; a low pressure cylinder 2; a condenser 3; a deaerator 4; a low-pressure heater 5; a fine processor 6; a heat supply network heater 7; a water distributor 8; a hot water storage tank 9; a primary pipe network 10; a solar photo-thermal heater 11; 12-heat supply network circulating water pump; 13-circulating water pump of solar photo-thermal system.
The medium pressure cylinder 1 is connected with one side of the low pressure cylinder 2 and one side of the heating network heater 7, and the other side of the low pressure cylinder 2 is connected with one side of the condenser 3; the other side of the condenser 3 is connected with one side of the fine processor 6; the other side of the fine processor 6 is connected with one side of the low-pressure heater 5; the other side of the low-pressure heater 5 is connected with the deaerator 4; the steam exhausted by the intermediate pressure cylinder 1 enters a heat supply network heater 7, the heat supply network heater 7 discharges the heat supply network drain water into a deaerator 4, the water exchanging heat with the steam exhausted by the intermediate pressure cylinder 1 is provided by a hot water storage tank 9, therefore, the heat supply network heater 7 is connected to both the lower part and the upper part of the hot water storage tank 9, and the solar photo-thermal heater 11 is connected to both the lower part and the upper part of the hot water storage tank 9, so that when heat exchange is performed, cold water is pumped into the heat supply network heater 7 and the solar photo-thermal heater 11 from the lower part of the hot water storage tank 9, the flow distribution can be matched by adjusting the rotating speed of the circulating pump or setting a flow regulating valve, the flow distribution is carried out by the heat supply network circulating water pump 12 and the solar photo-thermal system circulating water pump in the embodiment, after heat exchange is carried out in the heat supply network heater 7 and the solar photo-thermal heater 11, the heat is discharged from the heat supply network heater 7 and the solar photo-thermal heater 11 and enters the upper part of the heat storage water tank 9; water distributors 9 are arranged at the upper part and the lower part of the heat storage water tank 9 and are used for adjusting and controlling the stability of the thermocline in the heat storage water tank 9; the hot water storage tank 9 is also connected with a primary pipe network 10.
In the embodiment, the solar photo-thermal heater and the hot water storage tank are arranged in the cogeneration unit system, so that cold water discharged from the lower part of the hot water storage tank is heated by the solar photo-thermal heater in a time period without participating in deep peak shaving, and when the cold water is not sufficiently heated, steam discharged from a pressure cylinder in the unit can be extracted to heat, and heated hot water is stored in the hot water storage tank; in the time period of deep peak regulation, hot water in the heat storage water tank is supplied to the primary network system of the heat supply network through the water pump, so that heat stored in the time period of non-peak regulation is fully utilized, the heat supply steam extraction amount of the steam exhaust of the intermediate pressure cylinder at the moment is greatly reduced, and thermoelectric decoupling is realized.
In order to reduce the system investment and improve the system operation safety, the normal-pressure type inclined temperature layer heat storage tank is selected as the heat storage water tank 9 in the embodiment. At this time, the cold and hot working mediums can be stored in the hot water storage tank 9 at the same time, the design pressure of the hot water storage tank 9 is micro-positive pressure, preferably, the temperature range of the hot water stored in the hot water storage tank 9 is 70-98 ℃, and the pressure of the water at the maximum water temperature of 98 ℃ is the maximum bearing pressure value of the hot water storage tank 9.
Preferably, the invention can be applied to a combined heat and power generating unit modified by a micro-oil ignition system. The low-load stable combustion of the boiler can be realized by modifying a micro-oil ignition system of the unit. At the moment, the low-load continuous operation capacity of the boiler is close to the limit, so that the power generation load can be further reduced and the continuous and stable operation of the unit can be ensured by adopting the deep peak shaving solar photo-thermal heat storage system and the method for the cogeneration unit. For the single unit transformed by the micro-oil ignition combustion stabilizing system in the embodiment, when the single unit is put into operation, the boiler meets the lowest combustion stabilizing load. On the premise of ensuring the minimum cooling flow of the low-pressure cylinder 2, considering the average industrial steam extraction flow, the steam extracted by the intermediate pressure cylinder 1 can be used for heating cold water in the hot water storage tank 9 to make up the part with insufficient heating capacity of the solar photovoltaic heater when the illumination time is insufficient, when peak regulation is needed, the heat storage capacity of the hot water storage tank 9 is preferentially used for heat supply, the part with insufficient heating capacity is directly supplied with heat through the steam exhausted heating network backwater of the intermediate pressure cylinder 1 of the cogeneration unit, at the moment, the power generation load rate under the steam extraction working condition can be reduced to 25-35%, preferably, the power generation load is 30%.
Under the condition of a heat supply period of the cogeneration unit, according to a power grid dispatching instruction, a deep peak regulation period is carried out, the heat and power decoupling is realized, according to the characteristics of the cogeneration unit, along with the reduction of the power generation, the heat supply capacity of the unit is correspondingly reduced, in order to meet the heat load demand of a heat supply network, the heat storage water tank 9 is preferentially adopted to start the heat release process to release heat, namely, hot water on the upper part of the heat storage water tank 9 is supplied to a primary pipe network 10 for use, the insufficient heat supply part is directly supplied with heat by exhausting steam to heat the return water of the heat supply network through a middle pressure cylinder 1 of the cogeneration unit, the heat and power decoupling of the cogeneration unit is realized, and the deep peak regulation capacity of the cogeneration unit can be improved by 10%.
According to the invention, by arranging the solar photo-thermal heater and the hot water heat storage tank system in the thermal power generating unit system, the solar photo-thermal heater is used for heating circulating water cold water of the heat supply network in a non-peak regulation period, steam exhausted from a pressure cylinder in the thermal power generating unit can be extracted when the part is not sufficiently heated, the heat supply network heat exchanger is used for heating the cold water of the heat supply network, the heated water is stored in the hot water storage tank, and hot water in the hot water storage tank is supplied to the primary network system of the heat supply network in a period needing to participate in deep peak regulation, so that deep peak regulation is realized, the power generation load is reduced, and the continuous and stable operation of the thermal power generating unit is ensured. In the whole peak shaving process, the solar photo-thermal heating technology and the hot water heat storage technology are applied, the capacity of the unit for peak shaving on line is improved, the unit operation energy consumption is saved, and the dilemma of cleaning the energy consumption is effectively relieved. In the whole peak regulation process, the solar photo-thermal heating technology and the hot water heat storage technology are applied, the on-line peak regulation capacity of the cogeneration unit is improved, the power supply coal consumption of the unit is saved, the difficulty in consuming clean energy is effectively relieved, and the reasonable utilization of the clean energy is ensured.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. The solar photo-thermal heat storage system for the deep peak shaving of the cogeneration unit is characterized by comprising a solar photo-thermal heater and a hot water storage tank which are arranged in the cogeneration unit, wherein the cogeneration unit comprises a middle pressure cylinder and a heat network heater, and the hot water storage tank comprises a lower cold water outlet and an upper hot water inlet;
the lower cold water outlet of the hot water storage tank is connected with the water inlet of the solar photo-thermal heater and the water inlet of the heat supply network heater and used for supplying circulating water cold water of the heat supply network to the solar photo-thermal heater and the heat supply network heater;
the upper hot water inlet of the hot water storage tank is connected with the water outlet of the solar photo-thermal heater and the water outlet of the heat supply network heater and is used for storing water heated by the solar photo-thermal heater and the heat supply network heater to the upper part of the hot water storage tank;
the hot water storage tank is connected with the primary pipe network and is used for supplying hot water to the primary pipe network; the hot water storage tank is a normal-pressure inclined temperature layer hot water storage tank, cold and hot working media can be stored in the hot water storage tank at the same time, the design pressure of the hot water storage tank is micro-positive pressure, the temperature range of hot water stored in the hot water storage tank is 70-98 ℃, and the pressure of water at the maximum water temperature of 98 ℃ is taken as the maximum bearing pressure value of the hot water storage tank;
the intermediate pressure cylinder is connected with a steam inlet of the heat supply network heater through a steam exhaust pipeline and is used for heating circulating water cold water of the heat supply network through steam;
the solar photo-thermal heater is used for heating circulating water cold water of the heat supply network in a non-deep peak regulation period, the insufficient part is heated by extracting steam exhausted by the intermediate pressure cylinder, the circulating water cold water of the heat supply network is heated by the heat supply network heat exchanger, and the heated water is stored in the heat storage water tank;
the heat storage water tank is used for supplying hot water in the heat storage water tank to a primary pipe network in a deep peak regulation period so as to reduce the heat supply steam extraction amount of the medium pressure cylinder exhaust steam and realize thermoelectric decoupling.
2. The solar photo-thermal storage system with deep peak shaving of a cogeneration unit of claim 1, wherein the water inlets of the solar photo-thermal heater and the heat supply network heater are respectively provided with a solar photo-thermal system circulating water pump and a heat supply network circulating water pump for adjusting the inflow of water.
3. The solar photo-thermal heat storage system with the deep peak shaving function of the cogeneration unit according to claim 1, wherein the upper part and the lower part of the heat storage water tank are provided with stable water distributors for adjusting and controlling the thermocline in the heat storage water tank.
4. The solar photo-thermal heat storage system for the deep peak shaving of the cogeneration unit according to claim 1, wherein the cogeneration unit further comprises a low-pressure cylinder, a condenser, a deaerator, a low-pressure heater and a fine processor, the low-pressure cylinder is connected with the medium-pressure cylinder and the condenser, the fine processor, the low-pressure heater and the deaerator are sequentially connected, and the deaerator is connected with the heat supply network heater.
5. A method for deep peak shaving of a cogeneration unit is characterized by comprising the following steps:
a solar photo-thermal heater and a hot water storage tank are arranged in the cogeneration unit;
in the non-deep peak regulation period, a solar photo-thermal heater is used for heating circulating water cold water of a heat supply network, part of steam exhausted by a pressure cylinder in the unit is extracted when the heat is insufficient and is supplied to a heat supply network heat exchanger, the circulating water cold water of the heat supply network is heated by the heat supply network heat exchanger, and the heated water is stored in a water storage tank;
at the degree of depth peak regulation period, according to the characteristic of combined heat and power generation unit, along with the reduction of generated power, the unit heat supply load also correspondingly reduces, supplies the hot water in the heat storage water tank to a pipe network this moment, and the heat supply load of not enough is supplemented by the heat storage water tank, realizes thermoelectric decoupling zero.
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| CN113048456B (en) * | 2021-03-23 | 2022-08-19 | 国网陕西省电力公司电力科学研究院 | Energy storage power generation and heat supply system and method for deep peak shaving |
| CN114413311B (en) * | 2022-01-20 | 2023-07-14 | 大唐环境产业集团股份有限公司 | Cold end waste heat supply system of coal-fired unit of coupling oblique temperature layer heat storage tank and operation method |
| CN114922700A (en) * | 2022-06-09 | 2022-08-19 | 国能广投柳州发电有限公司 | Wind-solar complementary energy storage type industrial steam supply system |
| CN116182138B (en) * | 2023-04-26 | 2023-06-27 | 国家能源集团山西电力有限公司 | Deep peak regulation energy supply system and method for power generation by thermal-electrolytic coupling of coal-fired unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968734A (en) * | 2017-03-07 | 2017-07-21 | 赫普热力发展有限公司 | The accumulation of heat peak regulation system that a kind of turbine by pass and across season natural water are combined |
| CN108757071A (en) * | 2018-04-28 | 2018-11-06 | 东南大学 | A kind of solar energy-combined cycle complementation co-generation unit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7870746B2 (en) * | 2008-05-27 | 2011-01-18 | Expansion Energy, Llc | System and method for liquid air production, power storage and power release |
| EP3242012B1 (en) * | 2014-12-31 | 2023-10-18 | Shenzhen Enesoon Science & Technology Co., Ltd. | Combined energy supply system of wind, photovoltaic, solar thermal power and medium-based heat storage |
| CN106523053B (en) * | 2016-12-26 | 2017-10-13 | 王连生 | Solar heat and steam power plant's coupled electricity-generation and hot energy storage combined system and implementation method |
| CN106998079B (en) * | 2017-04-28 | 2020-05-05 | 东南大学 | A Modeling Method for Combined Heat and Power Optimal Scheduling Model |
| CN107631288A (en) * | 2017-09-30 | 2018-01-26 | 北京姚魏环保技术有限公司 | A kind of method of fired power generating unit depth peak regulation and backheat energy-conservation |
| MX2017016744A (en) * | 2017-12-19 | 2019-06-20 | Centro De Investigacion En Mat Avanzados S C | Cogeneration system for integration into solar water heating systems. |
-
2019
- 2019-07-09 CN CN201910613234.6A patent/CN110529209B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968734A (en) * | 2017-03-07 | 2017-07-21 | 赫普热力发展有限公司 | The accumulation of heat peak regulation system that a kind of turbine by pass and across season natural water are combined |
| CN108757071A (en) * | 2018-04-28 | 2018-11-06 | 东南大学 | A kind of solar energy-combined cycle complementation co-generation unit |
Non-Patent Citations (3)
| Title |
|---|
| 供热机组热电解耦技术对比;居文平等;《热力发电》;20180910(第09期);全文 * |
| 提升火电机组灵活性改造技术方案研究;苏鹏等;《中国电力》;20180505(第05期);全文 * |
| 火电汽轮机组热电解耦技术研究;柳磊等;《宁夏电力》;20171228(第06期);全文 * |
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