CN114877305A - Green power-coal power coupling power generation system and method utilizing renewable energy discarded power - Google Patents
Green power-coal power coupling power generation system and method utilizing renewable energy discarded power Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 49
- 238000010248 power generation Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000008878 coupling Effects 0.000 title description 3
- 238000010168 coupling process Methods 0.000 title description 3
- 238000005859 coupling reaction Methods 0.000 title description 3
- 230000005611 electricity Effects 0.000 claims abstract description 30
- 239000000843 powder Substances 0.000 claims abstract description 23
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 230000001172 regenerating effect Effects 0.000 claims abstract 2
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000446 fuel Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000005485 electric heating Methods 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000010298 pulverizing process Methods 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000010795 Steam Flooding Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements or dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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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
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/007—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with means for converting solar radiation into useful energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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Abstract
本发明公开了一种利用可再生能源弃电的绿电‑煤电耦合发电系统及方法，包括送风机、空气预热器、锅炉、磨煤机、一次风粉电加热器、二次风电加热器、电源、煤粉燃烧器和风力/光伏发电系统。本发明利用可再生能源弃电作为一次风粉电加热器和二次风电加热器的电力来源，将可再生能源弃电以一次风粉和二次风热能的形式送入炉内，在达到可再生电能消纳的同时实现弃电的高效电‑电转化。此外，本发明基于制粉系统的运行灵活性可快速适应可再生能源负荷变化，通过调节进入磨煤机的煤量在保持机组输出功率一定时，可减少燃煤消耗。
The invention discloses a green power-coal-electricity coupled power generation system and method using renewable energy to abandon electricity, including a blower, an air preheater, a boiler, a coal mill, a primary air pulverized electric heater, and a secondary air electric heater , power supplies, pulverized coal burners and wind/photovoltaic power generation systems. The invention utilizes the waste electricity of the renewable energy as the power source of the primary wind powder electric heater and the secondary wind electric heater, and sends the waste electricity of the renewable energy into the furnace in the form of primary wind powder and secondary wind heat energy. High-efficiency electricity-to-electricity conversion of abandoned electricity is realized while consuming regenerative electric energy. In addition, based on the operational flexibility of the pulverizing system, the present invention can quickly adapt to changes in the load of renewable energy, and by adjusting the amount of coal entering the coal mill, while keeping the output power of the unit constant, coal consumption can be reduced.
Description
技术领域technical field
本发明属于燃煤发电领域，特别涉及一种利用可再生能源弃电的绿电-煤电耦合发电系统及方法。The invention belongs to the field of coal-fired power generation, and in particular relates to a green power-coal-power coupled power generation system and method using renewable energy to abandon power.
背景技术Background technique
目前，风电和光伏等可再生能源装机容量不断增加，但风光资源的波动性、间歇性和随机性等特点致使其产生的电力无法被及时消纳，造成弃风弃光现象严重。尤其是在冬季，热电机组调峰能力受限导致大量风电光电不能上网，产生弃风弃光，浪费大量资源，如何提高可再生电力的消纳能力是亟待解决的难题。申请号为202110992618.0的中国专利公开了一种风力光伏发电辅助燃煤机组灵活性运行系统，虽然能够将不稳定运行时的风电和光伏发电用于加热熔盐，达到了弃风弃光电力消纳目的，但受熔盐工作温度限制，热电转化效率不高，有进一步提升的空间。At present, the installed capacity of renewable energy such as wind power and photovoltaics is continuously increasing, but the volatility, intermittency and randomness of wind and solar resources make the electricity generated by them unable to be consumed in time, resulting in serious abandonment of wind and solar power. Especially in winter, the limited peak shaving capacity of thermal power units results in a large number of wind power and photovoltaics not being able to connect to the Internet, resulting in abandonment of wind and light, waste of a lot of resources, and how to improve the consumption capacity of renewable electricity is an urgent problem to be solved. The Chinese Patent Application No. 202110992618.0 discloses a flexible operation system for wind photovoltaic power generation auxiliary coal-fired units. Although wind power and photovoltaic power generation during unstable operation can be used to heat molten salt, it achieves the power consumption of abandoning wind and photovoltaic power. However, due to the limitation of the working temperature of molten salt, the thermoelectric conversion efficiency is not high, and there is room for further improvement.
发明内容SUMMARY OF THE INVENTION
为克服现有技术存在的缺陷，本发明提供一种利用可再生能源弃电的绿电-煤电耦合发电系统及方法。In order to overcome the defects of the prior art, the present invention provides a green power-coal power coupled power generation system and method using renewable energy to abandon electricity.
为达到上述目的，本发明采用如下技术方案：To achieve the above object, the present invention adopts the following technical solutions:
利用可再生能源弃电的绿电-煤电耦合发电系统，包括送风机、空气预热器、锅炉、磨煤机、一次风粉电加热器、二次风电加热器、电源、煤粉燃烧器、锅炉受热面和风力/光伏发电机组；Green electricity-coal-electricity coupled power generation system using renewable energy to abandon electricity, including blower, air preheater, boiler, coal mill, primary air pulverized electric heater, secondary air electric heater, power supply, pulverized coal burner, Boiler heating surface and wind/photovoltaic generator sets;
所述送风机进口与大气相连通，送风机出口与布置在锅炉上的空气预热器的进口连通，所述空气预热器内送风与来自锅炉受热面出口烟气进行热交换，所述空气预热器的一次风出口与磨煤机的一次风入口相连通，所述磨煤机的出口与一次风粉电加热器的入口相连通，所述一次风粉电加热器的出口与煤粉燃烧器的燃料入口相连通；所述空气预热器的二次风出口与二次风电加热器的入口相连通，所述二次风电加热器的出口与煤粉燃烧器的二次风入口相连通，所述煤粉燃烧器布置在锅炉上；所述一次风粉电加热器和二次风电加热器的电源均与风力/光伏发电系统相连。The inlet of the blower is communicated with the atmosphere, and the outlet of the blower is communicated with the inlet of the air preheater arranged on the boiler. The primary air outlet of the heater is communicated with the primary air inlet of the coal mill, the outlet of the coal mill is communicated with the inlet of the primary air pulverized electric heater, and the outlet of the primary air pulverized electric heater is combusted with the pulverized coal. The fuel inlet of the air heater is communicated with the fuel inlet; the secondary air outlet of the air preheater is communicated with the inlet of the secondary air electric heater, and the outlet of the secondary air electric heater is communicated with the secondary air inlet of the pulverized coal burner , the pulverized coal burner is arranged on the boiler; the power sources of the primary air pulverized electric heater and the secondary air electric heater are both connected to the wind/photovoltaic power generation system.
进一步地，所述一次风粉电加热器和二次风电加热器所需电力由风力/光伏发电机组中弃电提供。Further, the electric power required by the primary wind powder electric heater and the secondary wind electric heater is provided by the abandoned electricity in the wind/photovoltaic generator set.
进一步地，所述一次风粉电加热器布置有单台或多台，且多台布置时串联或并联设置，所述一次风粉电加热器用于将一次风粉加热到接近一次风粉气流着火点。Further, the primary air-powder electric heaters are arranged in a single or multiple units, and when multiple units are arranged, they are arranged in series or in parallel. .
进一步地，所述二次风电加热器布置有单台或多台，且多台布置时串联或并联设置，所述二次风电加热器用于将二次风加热到400℃以上。Further, there are single or multiple sets of the secondary wind electric heaters, and multiple sets are arranged in series or in parallel, and the secondary wind electric heaters are used to heat the secondary air to above 400°C.
进一步地，所述一次风粉电加热器和二次风电加热器可采用电阻加热方式，但不局限于此一种加热方式。Further, the primary air powder electric heater and the secondary air electric heater may adopt a resistance heating method, but it is not limited to this heating method.
利用可再生能源弃电的绿电-煤电耦合发电系统的运行方法，包括以下步骤：The operation method of the green electricity-coal-electricity coupled power generation system using renewable energy to abandon electricity includes the following steps:
一次风和二次风经送风机送入空气预热器，与来自锅炉受热面出口烟气进行热交换；The primary air and secondary air are sent to the air preheater through the blower, and conduct heat exchange with the flue gas from the outlet of the heating surface of the boiler;
经初步预热后一次风经空气预热器的一次风出口送入磨煤机用于干燥和运输煤粉，磨煤机出口的一次风粉送入一次风粉电加热器利用电加热元件将风力/光伏发电机组中难以消纳的可再生电能转化为一次风粉的热能，一次风粉气流加热到第一预设温度后经煤粉燃烧器燃料喷口高速喷入锅炉炉膛燃烧；After preliminary preheating, the primary air is sent to the coal mill through the primary air outlet of the air preheater for drying and transporting pulverized coal. The renewable electric energy that is difficult to absorb in the wind/photovoltaic generator set is converted into the heat energy of the primary air pulverized air, and the primary air pulverized air is heated to the first preset temperature and injected into the boiler furnace at high speed through the fuel nozzle of the pulverized coal burner for combustion;
经初步预热后二次风经空气预热器的二次风出口送入二次风电加热器利用电加热元件将风力/光伏发电机组中难以消纳的可再生电能转化为二次风的热能，二次风加热到第二预设温度后经煤粉燃烧器二次风入口送入锅炉炉膛中参与燃烧。After preliminary preheating, the secondary air is sent to the secondary wind electric heater through the secondary air outlet of the air preheater. The electric heating element converts the difficult-to-consume renewable electric energy in the wind/photovoltaic generator set into the heat energy of the secondary air. , the secondary air is heated to the second preset temperature and sent to the boiler furnace through the secondary air inlet of the pulverized coal burner to participate in the combustion.
进一步地，当风电/光伏处于发电高峰期，锅炉降负荷以实现更多的可再生电能并网，可再生能源弃电用作一次风粉电加热器和二次风电加热器的电力来源，实现可再生电能的消纳，同时一次风粉和二次风加热到高温状态将稳定锅炉低负荷下煤粉燃烧。Further, when wind power/photovoltaic is in the peak power generation period, the boiler load is reduced to realize the connection of more renewable electric energy to the grid. The consumption of renewable electricity, and the heating of primary air and secondary air to high temperature will stabilize the combustion of pulverized coal under low load of the boiler.
进一步地，当保持燃煤机组输出功率一定时，可再生能源弃电用作一次风粉电加热器和二次风电加热器的电力来源，通过调整锅炉燃料量达到与可再生电能相匹配。Further, when the output power of the coal-fired unit is kept constant, the electricity abandoned by the renewable energy is used as the power source of the primary air-pulverized electric heater and the secondary wind electric heater, and the amount of boiler fuel can be adjusted to match the renewable electric energy.
进一步地，所述第一预设温度为接近一次风粉气流着火点。Further, the first preset temperature is close to the ignition point of the primary air-powder airflow.
进一步地，所述第二预设温度为400℃以上。Further, the second preset temperature is above 400°C.
与现有技术相比，本发明具有以下有益的技术效果：Compared with the prior art, the present invention has the following beneficial technical effects:
本发明将可再生能源弃电作为一次风粉电加热器和二次风加热器的电力来源，可再生能源弃电以一次风粉和二次风热能的形式送入炉内，这部分热能经锅炉受热面传递给工质水以产生高温蒸汽，高温蒸汽推动汽轮机发电做功，在消纳可再生能源弃电的同时可实现其高效的电-电转化。In the present invention, the waste electricity of renewable energy is used as the power source of the primary wind powder electric heater and the secondary wind heater, and the waste electricity of renewable energy is sent into the furnace in the form of primary wind powder and secondary wind heat energy, and this part of the heat energy is passed through the furnace. The heating surface of the boiler is transferred to the working water to generate high-temperature steam, and the high-temperature steam drives the steam turbine to generate power.
进一步地，保持燃煤机组一定功率输出时，利用可再生能源弃电加热一次风粉和二次风，减少了锅炉燃料量并降低燃煤机组碳排放，可以达到节能减排的目的，本发明基于制粉系统的运行灵活性可快速适应可再生能源负荷变化。Further, while maintaining a certain power output of the coal-fired unit, the use of renewable energy to abandon electricity to heat the primary air powder and secondary air reduces the amount of boiler fuel and reduces the carbon emission of the coal-fired unit, which can achieve the purpose of energy saving and emission reduction. The operational flexibility of the pulverizing system allows quick adaptation to changes in the renewable energy load.
进一步地，将一次风粉加热到接近着火点，二次风加热到400℃以上能够强化炉内燃烧过程。当机组低负荷运行时，在大幅提高锅炉低负荷稳燃性能的同时可以减少甚至避免锅炉低负荷运行时燃油的使用，提高锅炉低负荷运行的经济性并减少燃油带来的额外碳排放。Further, heating the primary air powder to close to the ignition point and heating the secondary air to above 400°C can strengthen the combustion process in the furnace. When the unit is running at low load, it can greatly improve the stable combustion performance of the boiler at low load, and at the same time reduce or even avoid the use of fuel oil when the boiler is running at low load, improve the economy of low-load operation of the boiler and reduce additional carbon emissions caused by fuel.
附图说明Description of drawings
说明书附图用来提供对本发明的进一步理解，构成本发明的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.
图1是本发明的利用可再生能源弃电的绿电-煤电深度耦合发电系统示意图。FIG. 1 is a schematic diagram of a green power-coal power deep coupling power generation system utilizing renewable energy to abandon electricity according to the present invention.
其中，1-送风机；2-空气预热器；3-锅炉；4-磨煤机；5-一次风粉电加热器；6-二次风电加热器；7-电源；8-煤粉燃烧器；9-锅炉受热面；10-风力/光伏发电机组。Among them, 1- blower; 2- air preheater; 3- boiler; 4- coal mill; 5- primary air pulverized electric heater; 6- secondary air electric heater; 7- power supply; 8- pulverized coal burner ; 9- boiler heating surface; 10- wind/photovoltaic generator set.
具体实施方式Detailed ways
为了使本技术领域的人员更好地理解本发明方案，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分的实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本发明保护的范围。In order to make those skilled in the art better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only Embodiments are part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本发明的实施例能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。It should be noted that the terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having" and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those expressly listed Rather, those steps or units may include other steps or units not expressly listed or inherent to these processes, methods, products or devices.
下面结合附图对本发明实施例做详细描述：Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:
如图1所示，本发明提供了一种利用可再生能源弃电的绿电-煤电深度耦合发电系统，具体包括：As shown in FIG. 1 , the present invention provides a green power-coal power deep coupling power generation system using renewable energy to abandon electricity, which specifically includes:
送风机1、空气预热器2、锅炉3、磨煤机4、一次风粉电加热器5、二次风电加热器6、电源7、煤粉燃烧器8、锅炉受热面9和风力/光伏发电系统10。Blower 1, Air Preheater 2, Boiler 3,
锅炉3内布置有空气预热器2、煤粉燃烧器8和锅炉受热面9；空气预热器2的一次风出口通过管道与磨煤机4相连，磨煤机4一次风粉出口通过管道与一次风粉电加热器5入口相连，一次风粉电加热器5出口通过管道与煤粉燃烧器8相连；空气预热器2的二次风出口通过管道与二次风电加热器6入口相连，二次风电加热器6出口通过管道与煤粉燃烧器8的二次风入口相连；一次风粉电加热器5和二次风电加热器6的电源7与风电/光伏发电机组10相连。The boiler 3 is equipped with an air preheater 2, a pulverized
本发明的工作过程为：当保持燃煤机组输出功率一定时，一次风和二次风经送风机1分别送入空气预热器2的一次风和二次风入口，与来自锅炉受热面9出口的烟气进行换热，换热后的一次风送入磨煤机4用于干燥和运输煤粉，磨煤机4出口的一次风粉经输送管道送入一次风粉电加热器5，一次风粉在一次风粉电加热器5加热到接近着火状态后经煤粉燃烧器8燃料喷口高速喷入锅炉3中燃烧，一次风粉电加热器5所需电力由风力/光伏发电系统10中弃电提供。在空气预热器2内换热后的二次风送入二次风电加热器6，二次风在二次风电加热器6中加热到400℃后送入煤粉燃烧器8的二次风入口，二次风电加热器5所需电力由风力/光伏发电系统10中弃电提供。为适应可再生能源快速负荷变化，可通过调节进入磨煤机4的煤量达到与可再生电能相匹配以维持机组输出功率一定。The working process of the present invention is as follows: when the output power of the coal-fired unit is kept constant, the primary air and the secondary air are respectively fed into the primary air and secondary air inlets of the air preheater 2 through the blower 1, and the primary air and the secondary air from the boiler heating surface 9 exit. After heat exchange, the primary air is sent to the
最后应说明的是：以上各实施例仅仅为本发明的较优实施例用以说明本发明的技术方案，而非对其限制，当然更不是限制本发明的专利范围；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围；也就是说，但凡在本发明的主体设计思想和精神上做出的毫无实质意义的改动或润色，其所解决的技术问题仍然与本发明一致的，均应当包含在本发明的保护范围之内；另外，将本发明的技术方案直接或间接的运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, not to limit them, and certainly not to limit the patent scope of the present invention; although referring to the foregoing embodiments The present invention has been described in detail, and those of ordinary skill in the art should understand that: it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements , does not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the various embodiments of the present invention; that is to say, any change or refinement made in the main design idea and spirit of the present invention that has no substantial meaning, it solves the problem. If the technical problems of the present invention are still consistent with the present invention, they shall be included within the protection scope of the present invention; in addition, the technical solutions of the present invention are directly or indirectly applied in other related technical fields, and are similarly included in the protection scope of the present invention. within the scope of patent protection.
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