Biomass and solar energy photo-thermal mixed power generation system

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Publication number
CN202645896U
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CN
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Grant
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Prior art keywords
biomass
heat
system
solar
steam
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CN 201220244609
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Chinese (zh)
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薛黎明
杨耀华
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中海阳新能源电力股份有限公司
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    • Y02E10/40Solar thermal energy
    • Y02E10/00Energy generation through renewable energy sources
    • Y02EREDUCTION OF GREENHOUSE GASES [GHG] EMISSION, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • YGENERAL 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
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling solar thermal engines

Abstract

The utility model discloses a biomass and solar energy photo-thermal mixed power generation system which comprises a solar collector system, a middle heat storage portion for storing heat in daytime or releasing heat at night, a steam generator, a biomass overheating boiler and a turbine set. The middle heat storage portion and the steam generator are in parallel connection to be arranged on a heat conduction circulation pipe of the solar collector system, the steam generator, the biomass overheating boiler and the turbine set are sequentially communicated through pipelines, the solar collector system, the steam generator the biomass overheating boiler and the turbine set are connected to form a day power generation unit, and the middle heat storage portion, the steam generator, the biomass overheating boiler and the turbine set are connected to form a night power generation unit. The biomass and solar energy photo-thermal mixed power generation system enables temperature of a steam outlet to reach to 535 DEG C and pressure of the outlet to reach to 13.3 MPa, so that efficiency of a turbine is similar to a thermal power plant. Furthermore, the biomass and solar energy photo-thermal mixed power generation system recycles burned smoke waste heat to preheat water before entering the steam generator so as to improve heat utilization rate.

Description

生物质与太阳能光热混合发电系统 Biomass and solar thermal hybrid power system

技术领域 TECHNICAL FIELD

[0001] 本实用新型涉及生物质发电与太阳能光热发电技术领域,尤其是一种生物质与太阳能光热混合发电系统。 [0001] The invention relates to biomass thermal power generation and solar energy technology field, in particular to a biomass and solar thermal hybrid power generation system.

背景技术 Background technique

[0002] 现有槽式太阳能热发电系统中通常用导热油作为传热介质,由于导热油使用温度不超过400°C,使系统中蒸汽出口温度只有370°C _380°C,出口压力在IOMPa左右。 [0002] Existing trough solar thermal power systems typically use thermal oil as the heat transfer medium, since the thermal oil temperature does not exceed 400 ° C, so that the system steam outlet temperature is only 370 ° C _380 ° C, outlet pressure IOMPa about. 这样就导致汽轮机热效率小于38%,比火电厂汽轮机效率低5%左右。 This results in the thermal efficiency of the turbine is less than 38%, lower than the thermal power plant steam turbine efficiency of about 5%. 而槽式太阳能与传统火电组成的联合循环发电系统中汽轮机效率得到提高,不过这样还是会增加CO2的排放和造成环境污染。 The combined cycle power generation system with the traditional trough solar thermal power consisting of turbine efficiency is improved, but this will still increase CO2 emissions and environmental pollution. 目前,我国生物质发电产业已经初步成型,已有多家电厂正在运行。 At present, China's biomass power industry has taken shape, there are many power plants running. 生物质发电主要是消费一些多余的农作物秸杆。 Biomass power consumption is mainly some excess crop straw. 从已建成的生物质发电厂来看,暴露出了资源收集和管理方面的矛盾和问题。 From biomass power plants have been built, the exposed resource collection and management of conflicts and problems. 而生物质发电的高成本,正是由于生物质资源需要收集、运输和储存造成的,生物质发电要解决农业生产的季节性和工业生产的连续性的结合的问题。 The high cost of biomass power generation, it is precisely because raw material resources required to collect, transport and storage caused by the combination of biomass power generation to solve the seasonal agricultural production and industrial production continuity problems. 由于农作物秸杆密度小,长距离运输成本高,导致在生物质发电厂生物质燃料不足,如果大范围收集,又会增加生物质发电的高成本。 Because of crop straw density, high long-distance transport costs, resulting in a shortage of biomass fuel biomass power plants, if the large-scale collection, biomass power generation will increase the cost. 而且在冬季生物质燃料大规模储存成本较高,也会提高生物质发电的成本。 And in the winter storage of large-scale biomass fuels high cost, it will increase the cost of biomass power generation.

实用新型内容 Utility Model Content

[0003] 针对现有技术存在的问题,本实用新型的目的在于提供一种生物质与太阳能光热混合发电系统,该混合发电系统既可以利用生物质燃烧提高水蒸汽的温度、压力,从而提高汽轮机热效率,又可以降低局部地区生物质的用量,减少生物质燃料收集、运输、储存的成本。 [0003] for the problems of the prior art, the utility model aims to provide a biomass and solar thermal hybrid power system, the hybrid power system can increase the use of biomass combustion steam temperature, pressure, thereby improving turbine thermal efficiency, and it can reduce the amount of biomass in some areas to reduce the biomass fuel collection, transportation and storage costs.

[0004] 为实现上述目的,本实用新型生物质与太阳能光热混合发电系统,包括太阳能集热场、用于白天存储热量或夜晚释放热量的中间储热部、蒸汽发生器、生物质过热锅炉和汽轮机组,中间储热部和蒸汽发生器并联设置在太阳能集热场的导热循环管道上,蒸汽发生器、生物质过热锅炉、汽轮机组通过管道依次连通,其中,太阳能集热场、蒸汽发生器、生物质过热锅炉和汽轮机组连接组成白天发电单元,中间储热部、蒸汽发生器、生物质过热锅炉和汽轮机组连接组成夜晚发电单元。 [0004] To achieve the above object, the present utility model biomass and solar thermal hybrid power systems, including solar collector field, intermediate heat storage unit for storing heat during the day or night the release of heat, steam generators, biomass boiler overheating and a steam turbine, an intermediate heat storage unit and the steam generator are arranged in parallel on the loop piping thermal solar collector field, steam generators, biomass thermal boiler, steam turbine in turn communicates through a conduit, wherein the solar collector field, the steam generator , a biomass boiler and superheated steam turbine connected to form a daytime power generation unit, the intermediate heat storage unit, steam generators, biomass boilers and superheated steam turbine power generation unit connected to form a night.

[0005] 进一步,所述中间储热部包括熔盐-导热油换热器、高温储热罐和低温储热罐,高温储热罐和低温储热罐分别通过熔盐循环管道与熔盐-导热油换热器连通。 [0005] Further, the intermediate portion comprises a molten salt heat storage - thermal oil heat exchangers, high temperature and low temperature thermal storage tank thermal storage tank, high-temperature and low-temperature thermal storage tank thermal storage tank respectively by molten salt and molten salt circulation duct - thermal oil heat exchanger connected.

[0006] 进一步,所述生物质过热锅炉的排烟通道上依次设置有余热预热器和烟气处理器。 [0006] Further, the raw material on the overheated boiler exhaust passage is provided turn heat and flue gas preheater processor.

[0007] 进一步,所述汽轮机组的排出端连接有水蒸气冷凝器,水蒸气冷凝器与所述余热预热器连通,水蒸气流过所述汽轮机组做功后,在水蒸气冷凝器内重新凝结为水,水导入所述余热预热器进行预热后导入所述蒸汽发生器循环使用。 After the [0007] Further, the discharge end of the steam turbine is connected to a steam condenser, steam condenser and heat the preheater communicating steam flowing through the steam turbine unit acting within the steam condenser again after condense the water out, the water introduced into the preheater for preheating the waste heat steam generator is introduced into the recycling.

[0008] 本实用新型用槽式太阳能集热系统收集的热量,为蒸汽发生器提供热能。 [0008] The utility model with a heat trough solar collector system to collect and provide heat for the steam generator. 用生物质燃烧产生的热能对蒸汽发生器产出的水蒸气进行过热,使水蒸汽出口温度达到535°C,出口压力达到13. 3mpa,这样使汽轮机热效率会与火电厂相当。 Heat generated by the combustion of biomass for steam superheating the steam generator output, so that the steam outlet temperature reaches 535 ° C, the outlet pressure reaches 13. 3mpa, this steam turbine and the thermal efficiency of thermal power plants will be considerable. 并且本实用新型回收燃烧烟气余热来为进入蒸汽发生器前的水进行预热,提高热利用率。 The utility model and the combustion flue gas heat recovery to preheat water before entering the steam generator, to improve the thermal efficiency.

附图说明 BRIEF DESCRIPTION

[0009] 图I为本实用新型结构示意图。 [0009] FIG. I based utility model structure diagram.

具体实施方式 detailed description

[0010] 下面,参考附图,对本实用新型进行更全面的说明,附图中示出了本实用新型的示例性实施例。 [0010] Next, with reference to the accompanying drawings, the utility model more fully described, illustrated in the drawings of the utility model of an exemplary embodiment. 然而,本实用新型可以体现为多种不同形式,并不应理解为局限于这里叙述的示例性实施例。 However, the utility model can be embodied in many different forms and should not be construed as limited to the exemplary embodiments described here. 而是,提供这些实施例,从而使本实用新型全面和完整,并将本实用新型的范围完全地传达给本领域的普通技术人员。 Rather, these embodiments are provided so that the utility model be thorough and complete, and the utility model fully convey the scope to those of ordinary skill.

[0011] 为了易于说明,在这里可以使用诸如“上”、“下” “左” “右”等空间相对术语,用于说明图中示出的一个元件或特征相对于另一个元件或特征的关系。 [0011] For ease of illustration, where you can use such as "upper", "lower", "left" and "right" and other space relative terms, is shown for explaining one element or feature relative to the other elements or features relationship. 应该理解的是,除了图中示出的方位之外,空间术语意在于包括装置在使用或操作中的不同方位。 It should be understood that in addition to the orientation is shown, comprising means intended spatial terms in the use of different orientations or operations. 例如,如果图中的装置被倒置,被叙述为位于其他元件或特征“下”的元件将定位在其他元件或特征“上”。 For example, if the device in the figures is inverted, it is described as the other elements or features located "under" the elements will be positioned at the other elements or features "on." 因此,示例性术语“下”可以包含上和下方位两者。 Thus, the exemplary term "under" can include both upper and lower bearing. 装置可以以其他方式定位(旋转90度或位于其他方位),这里所用的空间相对说明可相应地解释。 Device may be otherwise oriented (rotated 90 degrees or in a different position), as used herein, spatially relative description can be interpreted accordingly.

[0012] 如图I所示,本实用新型生物质与太阳能光热混合发电系统包括太阳能集热场I、用于白天存储热量或夜晚释放热量的中间储热部、蒸汽发生器5、生物质过热锅炉6、余热预热器7、烟气处理器8、汽轮机组9、水蒸气冷凝器10、导热油循环管道11、熔盐循环管道12、水工质循环管道13。 [0012] Figure I shows, the utility model biomass and solar thermal hybrid power generation system includes a solar collector field I, used to store heat during the day and release heat at night or the middle of the heat storage unit 5 steam generators, biomass 6 overheated boiler, waste heat preheater 7, flue gas processor 8, 9 steam turbine, steam condenser 10, oil circulation piping 11, molten salt circulation pipe 12, hydraulic medium circulation pipe 13. 本实施例中,中间储热部包括熔盐-导热油换热器2、高温储热罐3和低温储热罐4,高温储热罐3和低温储热罐4分别通过熔盐循环管道12与熔盐-导热油换热器2连通,在实际应用中,中间储热部还可采用多种形式的储热结构,只要其满足白天存储热量、夜晚释放热量的功能即可。 In this embodiment, the intermediate portion comprises a molten salt heat storage - thermal oil heat exchanger 2, the high temperature heat storage tank 3 and the low-temperature heat storage tank 4, high-temperature heat storage tank 3 and 4, respectively, low temperature heat storage tank molten salt circulating through conduit 12 and molten salt - 2 communicating thermal oil heat exchanger, in practice, the intermediate heat storage unit can be applied to various forms of thermal storage structure as long as it meets the heat stored during the day, night, heat emission feature.

[0013] 熔盐-导热油换热器2和蒸汽发生器5并联设置在太阳能集热场I的导热油循环管道11上。 [0013] Molten Salt - oil circulation piping thermal oil heat exchanger and steam generator 5 provided in parallel solar collector field on I 11. 汽轮机组9的排出端连接有水蒸气冷凝器10,生物质过热锅炉6的排烟通道上依次设置有余热预热器7和烟气处理器8。 Steam turbine discharge end 9 is connected to the steam condenser 10 biomass thermal boiler exhaust passage 6 sequentially provided with flue gas heat preheater 7 and 8 processors. 蒸汽发生器5、生物质过热锅炉6、汽轮机组9、水蒸气冷凝器10、余热预热器7通过水工质循环管道13依次连通。 5 steam generator, biomass boiler superheater 6, 9 steam turbine, steam condenser 10, heat preheater 7 through hydraulic medium circulation conduit 13 in turn communicating.

[0014] 在白天有阳光时该发电系统运行流程为:导热油流过太阳能集热场1,太阳能集热场I吸收太阳能转化为热能加热导热油,被加热后的导热油流出集热场后,一部分流过蒸汽发生器5,其携带的热能被水吸收,使水相变为水蒸气,水蒸气流入生物质过热锅炉6,经过生物质燃烧加热后,推动汽轮机组9发电;另一部分导热油流过熔盐-导热油换热器2,其携带的热能被熔盐吸收,实现了熔盐储热的过程。 [0014] during the day when the sun is the power system running processes: heat transfer oil flows through the solar collector field 1, the solar collector field I absorb solar energy into heat energy heating oil, after being heated HTF outflow collector field , part of the flow through the steam generator 5, which carries the heat absorbed by water, the water phase to vapor, superheated steam flows into the biomass boiler 6, after biomass combustion heating, steam turbine driven power generation 9; another part of the thermal conductivity oil flows through the molten salt - HTF heat exchanger 2, which carries thermal energy is absorbed by the molten salt, the molten salt heat storage implemented process. 白天储热过程中,熔盐从低温储热罐4流入熔盐-导热油换热器2,吸收热量后进入高温储热罐3,实现了熔盐储热的过程。 Daytime heat storage process, the molten salt heat from low-temperature molten salt flows into the tank 4 - 2 thermal oil heat exchanger, heat is absorbed into the high-temperature heat storage tank 3, to achieve the molten salt thermal storage process.

[0015] 生物质在生物质过热锅炉6中燃烧后产生的烟气流过余热预热器7,为水预热提供能量,然后经过烟气处理器8后排放。 [0015] Biomass biomass produced after 6 superheating boiler combustion flue gas preheater 7 flow through the heat recovery, provide energy for preheating the water, then the processor 8 through the flue gas discharge. 实现燃烧烟气余热回收利用。 Achieve combustion flue gas heat recovery. 水流过余热预热器7吸收烟气热量后进入蒸汽发生器5,吸收导热油的热量,相变为332. 6°C、13. 3Mpa的水蒸气。 After the water flows through the heat preheater 7 in flue gas heat into the steam generator 5, to absorb heat conducting oil phase becomes 332. 6 ° C, water vapor 13. 3Mpa of. 水蒸气流入生物质过热锅炉6被加热到535°C,再流过汽轮机,推动汽轮机组9发电,然后经过水蒸气冷凝器10,重新凝结为水,流入余热预热器7,实现水工质的循环。 Superheated steam flows into the biomass boiler 6 is heated to 535 ° C, and then flows through the turbine, steam turbine driven power generation 9, and then through the steam condenser 10, re-condenses into water, heat flows into the preheater 7, hydraulic implement quality cycle.

[0016] 在夜晚无阳光时该发电系统运行流程为:熔盐从高温储热罐3流入熔盐-导热油换热器2,放出热量后进入低温储热罐4,实现了熔盐放热的过程。 [0016] no sunlight at night the power system operation process: from the high temperature molten salt thermal storage tank 3 flows into the molten salt - thermal oil heat exchanger 2, after the release of heat into the low-temperature heat storage tank 4, to achieve a molten salt heat the process of. 在此过程中导热油流过熔盐-导热油换热器2,被熔盐加热后,再流过蒸汽发生器5,其携带的热能被水吸收,使水相变为水蒸气,水蒸气流入生物质过热锅炉6,经过生物质燃烧加热后,推动汽轮机组9发电。 In this process, heat transfer oil flows through the molten salt - HTF heat exchanger 2, after being heated molten salt, and then flows through the steam generator 5, which carries the thermal energy is absorbed by water, the aqueous phase into vapor, water vapor inflow biomass boiler superheater 6, after the burning of biomass heating, promoting the steam turbine power generation 9. 生物质在生物质过热锅炉6中燃烧后产生的烟气流过余热预热器7,为水预热提供能量,然后经过烟气处理器8后排放。 Biomass in the flue gas after biomass thermal boiler 6 flows through the heat produced by combustion preheater 7, to provide energy for preheating water, then after 8 processors smoke emissions. 实现燃烧烟气余热回收利用。 Achieve combustion flue gas heat recovery. 水流过余热预热器7吸收烟气热量后进入蒸汽发生器5,吸收导热油的热量,相变为332. 60C ,13. 3Mpa的水蒸气。 After the water flows through the heat preheater 7 in flue gas heat into the steam generator 5, to absorb heat conducting oil phase becomes 332. 60C, water vapor 13. 3Mpa of. 水蒸气流入生物质过热锅炉6被加热到535°C,再流过汽轮机,推动汽轮机组9发电,然后进过冷凝器,重新凝结为水,流入余热预热器7,实现水工质的循环。 Superheated steam flows into the biomass boiler 6 is heated to 535 ° C, and then flows through the turbine, steam turbine driven power generation 9, then enter through the condenser, re-condenses into water, heat flows into the preheater 7, to achieve a qualitative hydraulic cycle .

Claims (4)

1.生物质与太阳能光热混合发电系统,其特征在于,该混合发电系统包括太阳能集热场、用于白天存储热量或夜晚释放热量的中间储热部、蒸汽发生器、生物质过热锅炉和汽轮机组,中间储热部和蒸汽发生器并联设置在太阳能集热场的导热循环管道上,蒸汽发生器、生物质过热锅炉、汽轮机组通过管道依次连通,其中,太阳能集热场、蒸汽发生器、生物质过热锅炉和汽轮机组连接组成白天发电单元,中间储热部、蒸汽发生器、生物质过热锅炉和汽轮机组连接组成夜晚发电单元。 1. Biomass and solar thermal hybrid power system, characterized in that the hybrid power system comprises a solar collector field for storing heat during the day and release heat at night or the middle of the heat storage unit, steam generators, biomass boilers and superheated steam turbine, an intermediate heat storage unit and the steam generator are arranged in parallel on the loop piping thermal solar collector field, steam generators, biomass thermal boiler, steam turbine in turn communicates through a conduit, wherein the solar collector field, the steam generator , biomass boilers and superheated steam turbine connected to form a daytime power generation unit, the intermediate heat storage unit, steam generators, biomass boilers and superheated steam turbine power generation unit connected to form a night.
2.如权利要求I所述的生物质与太阳能光热混合发电系统,其特征在于,所述中间储热部包括熔盐-导热油换热器、高温储热罐和低温储热罐,高温储热罐和低温储热罐分别通过熔盐循环管道与熔盐-导热油换热器连通。 2. The biomass and solar energy I according to claim solar thermal hybrid power system, characterized in that said intermediate portion comprises a molten salt heat storage - thermal oil heat exchangers, high temperature and low temperature thermal storage tank thermal storage tank, high temperature and low-temperature heat storage tank through a molten salt heat storage tank were piping and molten salt - thermal oil heat exchanger connected.
3.如权利要求I所述的生物质与太阳能光热混合发电系统,其特征在于,所述生物质过热锅炉的排烟通道上依次设置有余热预热器和烟气处理器。 I claim the biomass and solar thermal hybrid power system, wherein the raw material on the overheated boiler exhaust passage is provided turn heat and flue gas preheater processor.
4.如权利要求3所述的生物质与太阳能光热混合发电系统,其特征在于,所述汽轮机组的排出端连接有水蒸气冷凝器,水蒸气冷凝器与所述余热预热器连通,水蒸气流过所述汽轮机组做功后,在水蒸气冷凝器内重新凝结为水,水导入所述余热预热器进行预热后导入所述蒸汽发生器循环使用。 4. The biomass and solar energy of claim 3, wherein the hybrid solar thermal power generation system, wherein the discharge end of the steam turbine is connected to a steam condenser, steam condenser and the heat preheater communication steam flowing through the steam turbine after doing work in the steam condenser condenses back into water, water into the waste heat preheaters preheating is introduced into the steam generator recycling.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103670551A (en) * 2013-12-13 2014-03-26 昆明理工大学 Combined solar energy and biomass organic Rankine circulation system
CN103670551B (en) * 2013-12-13 2015-12-09 昆明理工大学 A solar biomass with an organic Rankine cycle cogeneration
CN104266356A (en) * 2014-05-23 2015-01-07 深圳市爱能森设备技术有限公司 Molten salt heat transfer and storage trough electricity hot water boiler and hot water preparation method
CN104456528A (en) * 2014-11-05 2015-03-25 江苏太阳宝新能源有限公司 Method and system for comprehensively utilizing stored energy and smart power grid

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