Method and device for indirectly promoting medium and low temperature solar heat energy grades

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CN102061994A
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CN
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energy
heat
solar
steam
chemical
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CN 200910237837
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Chinese (zh)
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张娜
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中国科学院工程热物理研究所
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Abstract

The invention discloses a method for indirectly promoting medium and low temperature solar heat energy grades, which comprises the following steps of: introducing medium and low temperature solar heat energy in chemical regenerative cycle, converting the solar heat energy into steam internal energy by means of steam evaporation latent heat, converting the steam internal energy into synthetic gas chemical energy by reforming reaction with the participation of steam to realize grade promotion, and finally implementing heat power conversion in a combustion gas turbine system. Because of the introduction of solar energy, turbine exhaust waste heat reclamation is improved, fossil energy consumption is reduced, meanwhile, steam yield is increased, and chemical regeneration and physical regeneration benefits are increased. The solar energy heat-to-power net efficiency can reach 25 to 30 percent; and compared with the conventional chemical regenerative cycle, the efficiency is improved by 5.7 percent, the fossil energy can be saved by 20 to 30 percent, and meanwhile, CO2 emission reduction is realized. Therefore, the method has good economic efficiency and broad engineering application prospect.

Description

中低温太阳热能品位间接提升方法及装置 The low-temperature solar thermal grade indirect method and apparatus for lifting

技术领域 TECHNICAL FIELD

[0001] 本发明涉及一种中低温太阳热能品位间接提升的方法及据此提出的太阳能和化石能源综合互补的化学回热循环系统(SOLRGT)。 [0001] The present invention relates to a low temperature solar thermal grade indirect method and accordingly proposed to enhance solar energy and fossil chemical synthesis of complementary regenerative cycle system (SOLRGT).

背景技术 Background technique

[0002] 目前与本发明相关的技术主要包括中低温太阳能利用技术和利用化学回热循环发电技术,其各自技术的发展状况和系统特征如下: [0002] The present invention is currently working with related technologies including low temperature solar energy technology and the use of chemical regenerative cycle power generation technology, its development status and characteristics of each system technology are as follows:

[0003] 1)中低温太阳能利用技术 [0003] 1) low temperature solar energy utilization

[0004] 鉴于化石能源资源的有限性及其利用过程中产生污染的严重性,开拓新型洁净能源资源(特别是非碳能源)转换利用成为可持续发展的一个重要方面。 [0004] In view of the limited nature of its use of fossil energy resources produced in the severity of contamination, to develop new clean energy resources (especially non-carbon energy) into use has become an important aspect of sustainable development. 近年来,太阳能以其独具的储量无限性、存在的普遍性、开发利用的清洁性以及逐步提升的经济性等优势获得广泛关注,成为解决能源短缺、环境污染和温室效应的有效途径之一。 In recent years, solar energy reserves for its unique infinite, universal existence, development and utilization of clean and the gradual lifting of economic and other advantages received wide attention and become one of the effective ways to solve energy shortages, environmental pollution and the greenhouse effect .

[0005] 当前,太阳能利用技术的主要发展方向是太阳能光电转化和光热转化,其中光热转化的太阳能热动力发电又是未来二三十年最具吸引力的太阳能技术。 [0005] Currently, the main direction of development of solar energy technology is transforming solar photovoltaic and solar thermal conversion, wherein the photothermal conversion of solar thermal power generation and the next two or three decades is the most attractive solar technology. 但是诸如储能难和能量转化效率低等造成的太阳能发电技术成本居高不下,一直是困扰太阳能热动力发电系统大规模发展和工程应用的重大瓶颈。 However, the cost of technology such as solar energy storage and energy conversion efficiency is difficult due to the high and low, has been a major bottleneck troubled solar thermal power generation system large-scale development and engineering applications. 究其原因,一方面是太阳能能量密度低、时空分布不连续;另一方面且更为重要的是太阳能集热效率与热力循环热功转换效率一直存在难以调和的矛盾。 The reason the one hand, the low density of solar energy, spatial and temporal distribution is not continuous; on the other hand, and more importantly, the solar collector efficiency and thermodynamic cycle thermal power conversion efficiency has been difficult to reconcile the contradictions. 目前太阳能热发电技术以及新兴的热化学能量转换技术(如天然气重整的热化学能量转化系统等)研究多集中在900〜1200°C的高温太阳热能的转化和利用,且多为高温集热和热化学转换等部件性能的提高和相关新材料的研发。 At present solar thermal power technology and new thermo-chemical energy conversion technologies (such as natural gas reforming thermochemical energy conversion systems, etc.) studies were focused 900~1200 ° C high-temperature solar thermal energy conversion and use, and more for high-temperature collector R & D and thermochemical conversion and related components to improve the performance of new materials. 1000°C以上的高温集热无不以设备复杂、投资成本高和光热转换效率低为代价。 Temperatures above 1000 ° C to collectors all complex equipment, high investment costs and the photothermal conversion efficiency is low price. 相对而言,当前150〜350°C的中低温太阳能热利用技术以其良好的集热性能和经济简单的集热装置获得大规模商业化。 In contrast, the current low temperature solar thermal technology 150~350 ° C using its good economic performance and simple collector collector means for obtaining large-scale commercialization. 这个温度范围的集热器大多采用低聚光比的简单聚光装置,集热性能良好,集热效率一般能达到60%以上,且有效避免了高温太阳能能量转化系统的高成本代价。 This temperature range of collectors most simple means concentrating low concentration ratio, the good performance of the collector, the collector efficiency is generally above 60%, and effectively avoid the costly expense of high-temperature solar energy conversion systems. 然而,由工程热力学原理可知工质的温度越低,实现热转功越困难,目前中低温热量的利用尚缺乏行之有效的技术。 However, the lower thermodynamic principles known by the project working fluid temperature, the more difficult to achieve heat transfer power, current use of low temperature heat is still a lack of effective technology. 与此相对,常规能源利用系统经过百余年的发展,技术和工艺已日臻完善,如先进的燃气轮机工质温度已达1400°C以上。 On the other hand, the use of conventional energy systems through a hundred years of development, has been improving technologies and processes, such as advanced gas turbine working fluid temperature has reached 1400 ° C or more. 设想太阳能等可再生能源如果得以在常规能源系统中实现能量转换和释放,不但可以替代部分化石能源消耗,减少相应的污染物排放,更将极大地提高可再生能源能量释放品位和热转功效率,同时缓解其不稳定、不连续的供给难题。 Envisaged solar and other renewable energy sources can be achieved if the energy of conventional energy conversion systems and release, not only can replace part of the fossil energy consumption, reduce the corresponding emissions, but will greatly improve the quality and efficiency of heat transfer power renewable energy release , while alleviating its unstable and continuous supply problems. 中低温太阳能和化石燃料的互补梯级利用有望为同时解决太阳能能量转化效率低和实现化石燃料的清洁利用提供一条全新的途径。 Complement cascade low temperature solar energy and fossil fuel use is expected to simultaneously solve the low efficiency of solar energy conversion and implementation of clean use of fossil fuels to provide a new way.

[0006] 多能源互补系统中,中低温太阳能可以和热力系统中某些物理吸热过程相集成(热集成),如蒸发过程、回热过程;也可以和某些吸热化学反应相集成(热化学集成),如热解反应和重整反应等。 [0006] Multi complementary energy systems, low temperature heating systems and solar energy can be certain physical endothermic process integration (heat integration), such as the evaporation process, the heat recovery process; and some can also be integrated endothermic chemical reaction ( thermochemical integration), such as pyrolysis reaction and the reforming reaction. 前者如N. Lior和K. Koai提出的蒸汽朗肯循环互补系统,低温段工质水吸收约100°C太阳能热量蒸发,高温段化石燃料燃烧提供热量使蒸汽过热,形成不同热源在不同温度段的匹配利用,太阳能热输入份额高达80%,系统热效率可达18%。 The former, such as N. Lior and K. Koai proposed complementary steam Rankine cycle system, low-temperature working fluid to about 100 ° C water absorbs solar heat evaporation, high-temperature combustion of fossil fuels segment provides heat to superheat the steam, the formation of different heat sources at different temperatures segment matching, solar heat input share of up to 80%, the system thermal efficiency up to 18%. 后者如H. Hong和H. Jin提出的一种中低温太阳能与化石燃料热化学互补的联合循环系统,利用甲醇燃料在中低温条件下的热解特性,以200〜300°C的太阳能驱动甲醇热解吸热反应,生成以H2和CO为主要成分的合成气,从而使低品位太阳能转化为高品位合成气化学能;合成气驱动燃气/蒸汽联合循环做功,实现了中低温太阳能品位的提升和其在动力系统中的高效转化。 The latter as a medium and low temperature solar H. Hong H. Jin presented with fossil fuels thermochemical complementary combined cycle system, the use of methanol fuel pyrolysis characteristics under low temperature conditions to 200~300 ° C solar-powered methanol pyrolysis endothermic reaction to generate H2 and CO synthesis gas as a main component, so that the high-grade low-grade solar energy into chemical energy synthesis gas; synthesis gas drive gas / steam combined cycle acting to achieve a low-temperature solar grade and enhance its efficiency in the power conversion system. 其案例分析中,太阳能热输入比例为18%,太阳能发电净效率和系统佣效率分别达到35%和60. 7%,但该计算忽略了透平叶片冷却影响。 Its case studies, the solar heat input ratio of 18%, the net efficiency of solar power systems and commission rates were 35% and 60.7%, but this calculation ignores the impact of cooling turbine blades.

[0007] 2.利用化学回热循环发电技术 [0007] 2. The use of chemical regenerative cycle power generation technology

[0008] 化学回热循环在燃气透平Brayton循环的基础上引进了燃料的化学重整反应,当燃料为甲烷时,反应主要为: [0008] On the basis of chemical regenerative cycle gas turbine Brayton cycle on the introduction of a chemical reaction of the reforming fuel when the fuel is methane, the main reaction is:

[0009] CH4+H2OeCO+ 3Η2 ΔΗ = 206. IlkJ/(mol CH4) [0009] CH4 + H2OeCO + 3Η2 ΔΗ = 206. IlkJ / (mol CH4)

[0010] CO + H2OCO2+H2 ΔΗ = -41. 17kJ/(mol CO) [0010] CO + H2OCO2 + H2 ΔΗ = -41. 17kJ / (mol CO)

[0011] [0011]

CnHm + nH20 nCO + (m / 2 + n)H2 CnHm + nH20 nCO + (m / 2 + n) H2

[0012] 当燃料是甲醇时,反应主要为: [0012] When the fuel is methanol, the main reaction is:

[0013] CH30H+H20 CO2+H2 Δ H = 49. 47kJ/ (mol CH3OH) [0013] CH30H + H20 CO2 + H2 Δ H = 49. 47kJ / (mol CH3OH)

[0014] 它们都是吸热反应,压力越小、温度越高、水碳比越高,燃料转化率越高。 [0014] These reactions are endothermic, the smaller the pressure, the higher the temperature, the higher the ratio of steam to carbon is higher, the conversion rate of the fuel. 燃料转化为合成气后,燃料的热值得以改善,相比原来余热锅炉、回热器中对烟气余热的物理回收过程,化学回热循环增添了重整器中对烟气余热的化学回收过程,从而使循环达到较高的效率。 Fuels into synthesis gas, the hot fuel is worth to improve, compared to the original waste heat boiler, the regenerator flue gas waste heat recovery process of the physical, chemical, thermal cycling back to add chemical reformer flue gas waste heat recovery process, so that the cycle for good efficiency. 甲烷是天然气的主要成分,较甲醇而言应用更广。 Methane is the main component of natural gas, compared with methanol in terms of wider application. 但是甲烷重整反应在镍基催化剂下一般需要800°C以上的高温,而在330°C以下基本不发生反应。 But methane reforming reaction on nickel catalysts typically require temperatures above 800 ° C, 330 ° C and in the following basic reaction does not occur. 因此直接以中低温太阳能提供反应热来驱动甲烷重整反应是不可行的。 Therefore, provided directly to the low temperature solar heat to drive the reaction of methane reforming reaction is not feasible. 相较而言,甲醇在200〜300°C即可实现完全重整。 In contrast, methanol 200~300 ° C to achieve complete restructuring. Kesser等人1994年模拟结果表明:以甲烷为燃料的基本化学回热循环(无间冷再热) 的热效率达到48. 8%,高于相同注汽率下的注蒸汽循环。 Kesser et al. 1994 simulation results show that: methane fuel basic chemical regenerative cycle (seamless cold reheat) the thermal efficiency of 48.8%, higher than the same steam injection cycle steam injection rates. 同时,由于合成气中含有大量的水蒸汽,循环的NOx排放相当低、比功大幅提高。 Meanwhile, the synthesis gas containing a large amount of water vapor, NOx emission cycle is relatively low, a substantial increase in specific power.

发明内容 SUMMARY

[0015] 本发明的目的是提供一种中低温太阳热能品位间接提升方法及装置,以实现中低温太阳热能高效转换以及和化石燃料互补的综合梯级利用。 [0015] The present invention is to provide a low-temperature solar thermal grade lifting indirect method and apparatus, in order to achieve low-temperature solar thermal energy conversion efficiency of fossil fuels as well as complementary and integrated cascade utilization.

[0016] 为实现上述目的,本发明提供的中低温太阳热能品位间接提升的方法,在化学回热循环中引入中低温太阳热能,提供蒸汽蒸发潜热从而转化为蒸汽内能,通过蒸汽参与重整反应转化为合成气化学能,实现品位提升,最后在燃气轮机系统中实现热功转换。 [0016] To achieve the above purpose, low-temperature solar thermal quality of the present invention to provide indirect improvement methods, the introduction of low-temperature solar thermal energy in chemical regenerative cycle, the steam latent heat of evaporation and thus converted into steam internal energy through steam participation in reforming the reaction is converted to synthesis gas chemical energy to achieve quality improvement, and finally achieve thermal power conversion in the gas turbine system.

[0017] 本发明提供的用于实现上述方法的装置,主要包括: [0017] The apparatus for carrying out the method of the present invention provides, including:

[0018] 低压压气机:将空气升至一定压力; [0018] low-pressure compressor: the air up to a certain pressure;

[0019] 间冷器:对升至一定压力的空气进行冷却降温; [0019] intercooler: up to a certain pressure to cool down the air;

[0020] 高压压气机:将空气升压至Brayton循环的最高压力; [0020] high-pressure compressor: The air pressurized to a maximum pressure Brayton cycle;

[0021] 燃料压气机:将燃料气体升压至重整反应的压力; [0021] Fuel Compressor: to boost the fuel gas reforming reaction pressure;

[0022] 泵:将淡水升压至重整反应的压力; [0022] Pump: fresh water pressure booster to the reforming reaction;

[0023] 回热器:利用透平排气对水蒸汽与压缩后燃料气体的混合气、压缩后的空气进行加热; [0023] Regenerator: by air turbine exhaust steam after compression of the fuel gas mixture, compressed heating;

[0024] 重整器:由烟气供热,使燃料与水蒸汽在压力下进行化学重整反应; [0024] reformer: heat from the flue gas, the fuel with steam reforming chemical reactions under pressure;

[0025] 燃烧室:合成气和空气发生燃烧反应,得到高温气体; [0025] combustion: Synthesis gas and air combustion reaction occurs, obtain high-temperature gas;

[0026] 燃气透平:高温燃气膨胀做功; [0026] Gas turbine: high-temperature gas expansion work;

[0027] 发电机:与燃气透平连接,将燃气透平产生机械功转化为电能输出; [0027] generator: Connect with the gas turbine, the gas turbine to produce mechanical power into electrical energy output;

[0028] 省煤器:由烟气供热,加热淡水流股至重整反应压力下的饱和态; [0028] economizer: from the flue gas heating, heating freshwater stream to the reforming reaction pressure saturated state;

[0029] 蒸发器:利用太阳能将重整反应压力下的饱和水蒸发; [0029] Evaporator: the use of solar reforming reaction pressure of saturated water evaporation;

[0030] 太阳能集热器:收集太阳能; [0030] The solar collector: collecting solar energy;

[0031] 加压后的水送入省煤器加热至重整压力下的饱和水态,再进入太阳能集热器供热的蒸发器加热为蒸汽,与燃料压气机压缩后的燃料气体混合后送入回热器进一步被加热, 随后进入重整器发生吸热反应,生成的合成气送入燃烧室;空气经低压压气机压缩后,送入间冷器进行冷却,再送入高压压气机压缩至Brayton循环的最高压力,随后送入回热器进一步被加热,最后送入燃烧室,与合成气燃烧生成高温燃气,送入燃气透平膨胀做功,实现动力输出。 After the [0031] The pressurized water is fed to the economizer heating water saturated state reforming pressure, and then into the evaporator heating solar collector heating steam, fuel gas is mixed with fuel compressor compressed into the regenerator is further heated, and then entered the synthesis gas reformer endothermic reactions occur, resulting into the combustion chamber; after compressed air through the low-pressure compressor, is fed between the cooler for cooling, and then compressed into high-pressure compressor to the maximum pressure Brayton cycle, and then into the regenerator is further heated, and finally into the combustion chamber, and synthesis gas combustion generates hot gas, into the gas turbine expansion work to achieve power output.

[0032] 所述的装置中,重整器热侧进口为燃气透平排气,出口连接回热器,冷侧进口与回热器连接,出口连接燃烧室。 Means [0032] according to the hot side of the reformer to import gas turbine exhaust outlet connection regenerator, the cold side of the regenerator is connected with the import and export connection chamber.

[0033] 所述的装置中,回热器热侧进口与重整器连接,出口连接省煤器,冷侧进口与高压压气机、燃料气体与蒸汽的混合室连接,出口分别连接燃烧室、重整器。 Means [0033] according to the hot side of the regenerator inlet and reformer connected to the outlet connection economizer, cold side inlet connection with the high-pressure compressor, fuel gas and steam mixing chamber, the outlet chamber are connected, reformer.

[0034] 所述的装置中,蒸发器所需热量由太阳能集热器提供,进口与省煤器相连,出口蒸汽与压缩后燃料气体进行混合。 Means [0034] according to the evaporator heat required is provided by solar collectors, imports and economizer connected to the fuel gas is mixed with steam outlet compression.

[0035] 所述的装置中,省煤器热侧进口与回热器连接,冷侧出口连接蒸发器,进口与泵相连。 Means [0035] according to the hot side economizer import and the regenerator is connected, the cold side of the evaporator outlet connector, import and connected to the pump.

[0036] 所述的装置中,压缩空气的低压压气机和高压压气机之间布置了间冷器。 Means [0036] according to the arrangement of the intercooler between the low pressure compressor and high pressure air compressor.

[0037] 所述的装置中,空气采用了间冷压缩。 Means [0037], wherein the air used between cold compression.

[0038] 所述的装置中,回热器的冷侧布置了压缩后燃料气体与水蒸汽的混合气体、压缩后的空气两股物流。 Means [0038] according to the cold side of the regenerator arranged a compressed gas mixture of fuel gas and steam, compressed air after the two streams.

[0039] 本发明实现了中低温太阳热能高效转换以及和化石燃料互补的综合梯级利用,效率提高的同时实现了(X)2减排,热力性、环保性俱佳,具有广阔的工程应用前景。 [0039] The present invention enables low-temperature solar thermal energy conversion efficiency of fossil fuels as well as complementary and integrated cascade utilization, while achieving efficiency (X) 2 reduction, thermal and environmental superb, the project has broad application prospects .

附图说明 BRIEF DESCRIPTION

[0040] 图1为本发明的中低温太阳能品位的间接提升。 [0040] FIG. 1 indirect promotion of low-temperature solar grade present invention.

[0041] 图2为本发明的太阳能品位间接提升的SOLRGT循环装置流程图。 [0041] FIG. 2 of the present invention indirect solar grade promotion SOLRGT cycle apparatus flowchart.

具体实施方式 detailed description

[0042] 本发明通过燃料重整反应实现中低温太阳热能品位间接提升的方法和太阳能化石燃料互补的化学回热循环(SOLRGT)系统,是将太阳能品位间接提升与高效燃气轮机循环相结合,在化学回热循环中引入中低温太阳能,首先提供蒸汽蒸发潜热转化为蒸汽内能, 再通过参与重整反应进一步转化为合成气化学能,品位提升后,最后在燃机中实现热功转换。 [0042] The present invention is realized by a fuel reforming reaction low temperature solar thermal grade indirect methods to enhance fossil fuel and solar complementary chemical regenerative cycle (SOLRGT) system, is the indirect solar grade promotion and efficient gas turbine combined cycle in the chemical Recuperated introducing low temperature solar energy, the first steam evaporation latent heat into steam energy, and through participation in the reforming reaction is further converted into synthesis gas chemical energy, after grade promotion, the final realization of the gas turbine thermal power conversion. 主要设备包括:[0043] 低压压气机:将空气升至一定压力; The main equipment includes: [0043] low-pressure compressor: the air up to a certain pressure;

[0044] 间冷器:对升至一定压力的空气进行冷却降温; [0044] intercooler: up to a certain pressure to cool down the air;

[0045] 高压压气机:将空气升压至Brayton循环的最高压力; [0045] high-pressure compressor: The air pressurized to a maximum pressure Brayton cycle;

[0046] 燃料压气机:将燃料气体升压至重整反应的压力(考虑压损); [0046] Compressor fuel: fuel gas pressure to boost the reforming reaction (consider pressure drop);

[0047] 泵:将淡水升压至重整反应的压力(考虑压损); [0047] Pump: fresh boost to the reforming reaction pressure (pressure drop considerations);

[0048] 回热器:利用透平排气对水蒸汽与压缩后燃料气体的混合气、压缩后的空气进行加热; [0048] Regenerator: by air turbine exhaust steam after compression of the fuel gas mixture, compressed heating;

[0049] 重整器:由烟气供热,使燃料与水蒸汽在一定的压力下进行化学重整反应; [0049] reformer: heat from the flue gas, the fuel with water vapor under certain pressure chemical reforming reaction;

[0050] 燃烧室:合成气和空气发生燃烧反应,得到高温气体; [0051 ] 燃气透平:高温燃气膨胀做功; [0050] combustion: Synthesis gas and air combustion reaction occurs, obtain high-temperature gas; [0051] Gas turbine: high-temperature gas expansion work;

[0052] 发电机:与燃气透平连接,将燃气透平产生机械功转化为电能输出; [0052] generator: Connect with the gas turbine, the gas turbine to produce mechanical power into electrical energy output;

[0053] 省煤器:由烟气供热,加热淡水流股至重整反应压力下的饱和态; [0053] economizer: from the flue gas heating, heating freshwater stream to the reforming reaction pressure saturated state;

[0054] 蒸发器:利用太阳能将重整反应压力下的饱和水蒸发; [0054] Evaporator: the use of solar reforming reaction pressure of saturated water evaporation;

[0055] 太阳能集热器:收集太阳能。 [0055] Solar collectors: to collect solar energy.

[0056] 上述各设备之间的连接均为通常采用的管道连接。 [0056] one of the respective devices are usually connected to the pipeline.

[0057] 所述的太阳能和化石能源综合互补的化学回热循环系统(SOLRGT),其特征在于: 重整器热侧进口为燃气透平排气,出口连接回热器,冷侧进口与回热器连接,出口连接燃烧室;回热器热侧进口与重整器连接,出口连接省煤器,冷侧进口与高压压气机、燃料气体与蒸汽的混合室连接,出口分别连接燃烧室、重整器;蒸发器所需热量由太阳能集热器提供, 进口与省煤器相连,出口蒸汽与压缩后燃料气体进行混合;省煤器热侧进口与回热器连接, 冷侧出口连接蒸发器,进口与泵相连;压缩空气的低压压气机和高压压气机之间布置了间冷器。 [0057] The solar energy and fossil chemical synthesis of complementary regenerative cycle system (SOLRGT), characterized in that: the hot side of the reformer to import gas turbine exhaust outlet connection regenerator cold side inlet and back thermal connection, outlet connection chamber; regenerator the hot side inlet and reformer connected to the outlet connection economizer, cold side inlet and the high pressure compressor, fuel gas and steam mixing chamber connected to the outlet are connected to the combustion chamber, reformer; evaporator heat required is provided by solar collectors, imports and economizer connected to the fuel gas is mixed with the compressed steam outlet; import side economizer heat regenerator is connected with the cold side of the evaporator outlet connection , and imported connected to the pump; intercooler arranged between the low pressure compressor and high pressure air compressor.

[0058] 本发明的太阳能和化石能源综合互补的化学回热循环系统(SOLRGT)的流程: [0058] The present invention is a solar and fossil energy chemical synthesis of complementary regenerative cycle system (SOLRGT) process:

[0059] 加压后的水送入省煤器加热至重整压力下的饱和水态,再进入太阳能集热器供热的蒸发器加热为蒸汽,与燃料压气机压缩后的燃料气体混合后送入回热器进一步被加热, 随后进入重整器发生吸热反应,生成的合成气送入燃烧室;空气经低压压气机压缩后,送入间冷器进行冷却,再送入高压压气机压缩至Brayton循环的最高压力,随后送入回热器进一步被加热,最后送入燃烧室,与合成气燃烧生成高温燃气,送入燃气透平膨胀做功,实现动力输出。 After the [0059] The pressurized water is fed to the economizer heating water saturated state reforming pressure, and then into the evaporator heating solar collector heating steam, fuel gas is mixed with fuel compressor compressed into the regenerator is further heated, and then entered the synthesis gas reformer endothermic reactions occur, resulting into the combustion chamber; after compressed air through the low-pressure compressor, is fed between the cooler for cooling, and then compressed into high-pressure compressor to the maximum pressure Brayton cycle, and then into the regenerator is further heated, and finally into the combustion chamber, and synthesis gas combustion generates hot gas, into the gas turbine expansion work to achieve power output.

[0060] 所述的太阳能和化石能源综合互补的化学回热循环系统(SOLRGT)的流程,其特征在于: [0060] The solar energy and fossil chemical synthesis of complementary regenerative cycle system (SOLRGT) process, characterized in that:

[0061] 烟气自燃气透平排出后,温度从高到低依次流经重整器、回热器、省煤器进行余热回收;重整反应的水先在省煤器中由烟气加热至饱和水态,再在太阳能集热器供热的蒸发器中由中低温太阳能加热为蒸汽;空气采用了间冷压缩;回热器的冷侧布置了压缩后燃料气体与水蒸汽的混合气体、压缩后的空气两股物流。 [0061] After the flue gas from the gas turbine exhaust temperature from high to low flow through the reformer, regenerator, economizer waste heat recovery; reforming reaction in water prior to the flue gas is heated by the economizer water-saturated state, and then in the evaporator solar collector heating in low temperature solar heating Central steam; compressed air used between cold; cold side regenerator arranged mixed gas compressed fuel gas and water vapor, two streams of air after compression.

[0062] 本发明与中低温太阳能直接提供重整反应热(即直接热化学集成)不同,在以甲烷为例的中低温太阳能品位间接提升中(图1),太阳能提供重整反应所需蒸汽的汽化潜热,从而转化为蒸汽内能,这是一个热集成过程;所产生的蒸汽进而和甲烷在较高温度下进行重整反应,太阳热能借蒸汽内能的形式参与反应,通过热化学反应间接转化为合成气化学能。 [0062] The present invention relates to low-temperature solar thermal reforming reaction directly (direct thermochemical integration) is different in methane as an example of low grade solar indirect ascension (Figure 1), to provide the required solar steam reforming reaction the latent heat of vaporization, which can be converted to steam, which is a heat integration process; and thus generated steam methane reforming reaction at a higher temperature, solar thermal energy in the form of steam energy by participating in the reaction by thermochemical reaction indirect conversion of synthesis gas to chemical energy. 可视为两步法转换过程,实现了热集成和热化学转化的有机结合及中低温太阳热能品位的间接提升。 It can be regarded as two-step conversion process to achieve integration and the combination of heat and thermo-chemical conversion of low-temperature solar thermal grade indirect promotion. 可见,该系统具有优秀的热力性能,节省了化石能源,更加环保。 Visible, the system has excellent thermal performance, saving fossil energy, more environmentally friendly.

[0063] 下面将结合相应附图对本发明的具体实施例进行详细描述。 [0063] The following will be combined with the corresponding figures of specific embodiments of the present invention will be described in detail.

[0064] 具体实施例参看图2,本发明的主要部分为以空气为主要循环工质的太阳能和化石能源综合互补的化学回热循环系统(SOLRGT)。 [0064] Referring to the specific embodiment of FIG. 2, the main part of the present invention is in the air as the main working fluid cycle of solar and fossil energy chemical synthesis of complementary regenerative cycle system (SOLRGT). 其中:1-低压压气机;2-间冷器;3-高压压气机;4-回热器;5-燃烧室;6-燃气透平;7-发电机;8-重整器;9-燃料压气机;10-太阳能集热器;11-蒸发器;12-省煤器;13-泵。 Where: 1 - low pressure compressor; 2- intercooler; 3 - high pressure compressor; 4- regenerator; 5- chamber; 6- gas turbine; 7- generator; 8- reformer; 9- fuel compressor; 10- solar collectors; 11- evaporator; 12- economizer; 13- pump.

[0065] 上述系统中的连接为公知技术,本发明在此不作具体描述。 [0065] The above system is connected to a known technique, the present invention is not specifically described herein.

[0066] 系统流程描述: [0066] System Process Description:

[0067] 该系统主要包括太阳能和化石能源综合互补的化学回热循环系统。 [0067] The system includes solar and fossil energy chemical synthesis of complementary regenerative cycle system.

[0068] 加压后的水(S7)送入省煤器12加热至重整压力下的饱和水态(S8),再进入太阳能集热器10供热的蒸发器11加热为蒸汽(S9),与燃料压气机9压缩后的燃料气体(Sll)混合后(Si》送入回热器4进一步被加热,随后进入重整器8发生吸热反应(S13),生成的合成气(S14)送入燃烧室5 ;空气经低压压气机1压缩后(S2),送入间冷器2进行冷却(S3), 再送入高压压气机3压缩至Brayton循环的最高压力(S4),随后送入回热器4进一步被加热(S5),最后送入燃烧室5,与合成气(S14)燃烧生成高温燃气(S15),送入燃气透平6膨胀做功,实现动力输出。烟气(S16)自燃气透平6排出后,温度从高到低依次流经重整器8、回热器4、省煤器12进行余热回收(S17、S18、S19)。 [0068] The pressurized water (S7) into the economizer 12 is heated to the saturation pressure of water reforming state (S8), an evaporator 10 and then into the solar collector 11 heated heating steam (S9) with fuel compressor 9 compressed fuel gas (Sll) mixed (Si "into the regenerator 4 is further heated, and then entered the reformer 8 endothermic reaction (S13), the synthesis gas generated (S14) into the combustion chamber 5; after air through the low-pressure compressor 1 compression room (S2), into the cooler 2 for cooling (S3), and then into the high pressure compressor 3 is compressed to the maximum pressure Brayton cycle (S4), and then fed regenerator 4 is further heated (S5), and finally into the combustion chamber 5, and synthesis gas (S14) to generate high-temperature combustion gas (S15), sent to the gas turbine 6 expansion work, achieve a power output of fumes (S16) 6 is discharged from the gas turbine, the temperature descending order flow through the reformer 8, regenerator 4, waste heat recovery economizer 12 (S17, S18, S19).

[0069] 具体实施例在平衡工况性能参数见表1。 [0069] In particular embodiments equilibrium condition performance parameters in Table 1. 主要有关条件为:系统稳态运行状况下, 压气机效率89 % ;燃烧室燃烧效率100 %,压损为3 % ;燃气透平等熵效率88 %,重整器热侧压损2%,冷侧压损10%,节点温差20°C,余热锅炉节点温差15°C。 Mainly related conditions: under steady-state operating conditions, compressor efficiency of 89%; 100% efficiency of the combustion chamber, a pressure drop of 3%; gas permeability equal isentropic efficiency of 88%, the reformer hot side pressure drop 2%, cold side pressure loss of 10%, the node temperature difference 20 ° C, the temperature difference between the nodes HRSG 15 ° C.

[0070] 具体实施例循环平衡工况热力性能参数参看表2,表2同时在相同的假设条件下(包括透平初温1308°C、节点温差及部件性能等),对常规间冷化学回热燃气轮机(IC-CRGT)循环和SOLRGT循环进行了模拟对比,可见SOLRGT系统中,太阳热输入份额为20. 3%,化石能源节约率可达23. 3%。 [0070] Examples cycle balance of Thermal Performance Parameters DETAILED DESCRIPTION Referring to Table 2, Table 2 at the same time under the same assumptions (including turbine initial temperature of 1308 ° C, the temperature difference between the node and component performance, etc.), conventional chemical intercooling back Gas turbine (IC-CRGT) cycles and cycle simulation SOLRGT contrast, visible SOLRGT system, solar heat input share of 20.3%, fossil energy savings rate of 23.3%. 太阳热能净转功效率可达沈.5%,远高于同样温度下常规太阳能热发电系统。 Solar thermal power net transfer efficiency of up to sink 0.5%, much higher than conventional solar thermal power generation system at the same temperature. 单位发电量(X)2排放为342. 7g/kffh,比IC-CRGT系统中低23. 3%, CO2相对减排量和化石能源节约率相一致,这是因为(X)2排放量和化石燃料消耗量成正比。 2 emissions and power generation units (X) 2 emissions 342. 7g / kffh, 23.3% lower than the IC-CRGT system, CO2 emission reductions relative to fossil energy savings and consistent rate, because (X) fossil fuel consumption is proportional. 需要指出的是,上述结果是在理想情况下、也即在太阳热能温度满足220°C水蒸发要求的情况下得到的。 It should be noted that the above result is in the ideal case, i.e. the temperature of the solar heat in the case satisfies 220 ° C to obtain water evaporation claims. 如果太阳热能达不到上述温度要求,需要采用补燃或降低蒸发温度(压力)、蒸发后再提升蒸汽压力至重整反应要求压力等情况下,系统效率会相应降低。 If the heat under the sun can not reach a temperature above requirements, the need to reduce the use of staged combustion or evaporation temperature (pressure), and then evaporated to enhance steam reforming reaction pressure to the required pressure, etc., the system efficiency will be reduced accordingly.

[0071] 和常规化学回热燃气轮机(CRGT)系统相比,新系统需要增设中低温太阳能集热设备,可以采用技术相对成熟、造价较低的槽式集热器。 [0071] and the conventional chemical heat recovery turbine (CRGT) system, the new system requires additional low-temperature solar collector device, you can use a relatively mature technology, low cost trough collectors. 槽式集热器在中低温应用场合具有优良的集热性能,即使在lOOW/m2的太阳辐照强度下也可达到50%以上的集热效率。 Trough collectors at low temperature applications with excellent collector performance, even in the solar irradiance lOOW / m2 can also be more than 50% of the collection efficiency. 应该指出的是,系统效率和太阳能热转功效率的提升与系统经济性改善直接相关;此外系统在CO2减排、及化学回热循环本身在NOx排放等方面的优势也是进行经济性分析时应该考虑的因素。 It should be noted, is directly related to enhance system efficiency and solar thermal power transfer efficiency of the system and the economy improved; in addition, the system CO2 emissions, chemical and heat recovery loop itself advantages in terms of NOx emissions also should conduct economic analysis considerations.

[0072] 表1 :本发明的装置主要性能参数[0073] [0072] Table 1: apparatus main performance parameters of the present invention [0073]

Figure CN102061994AD00081

[0074] 表2:系统热力性能数据 [0074] Table 2: Thermal performance data

[0075] [0075]

Figure CN102061994AD00082

[0076] 表2 中: [0076] Table 2:

[0077] 由于系统有太阳能和化石能源两种不同输入,因此佣效率是较为合适的评价准则。 [0077] Since the system has two different solar energy and fossil energy input, and therefore the efficiency of the commission is more appropriate evaluation criteria. 近似认为燃料拥约等于其低位发热量,定义系统当量拥效率如下: Approximated that hold the fuel is approximately equal to its net calorific value, the definition of system efficiency equivalent owned as follows:

L0078」 L0078 "

Figure CN102061994AD00083

[0079] 其中Ttl为环境温度。 [0079] wherein Ttl ambient temperature. 当太阳能热输入份额为零时,上述当量哄效率则等于系统热效率。 When the solar heat input share is zero, then the above-mentioned equivalent coax efficiency equal to the system thermal efficiency. [0080] [0081] X [0080] [0081] X

太阳能热输入份额和其净热电转换效率(后者考虑了集热器损失)定义为 Solar heat input share and its net thermoelectric conversion efficiency (the latter considered a collector loss) is defined as

一Qsol __Qsoi_ A Qsol __Qsoi_

Qfh ~ mf-LHV ^Qsol Wnei-Wref _Wm,-Qfneref Qfh ~ mf-LHV ^ Qsol Wnei-Wref _Wm, -Qfneref

sol sol

[0082] Hsoi [0082] Hsoi

^rad Urad ^ Rad Urad

[0083] 其中,Wref是同化石燃料输入下参比系统发电量,= ne,ref0本文中选取参比系统为常规间冷化学回热燃气轮机(IC-CRGT)系统。 [0083] wherein, Wref is the same fossil fuel input under reference system capacity, = ne, ref0 herein Select reference system for the conventional chemical intercooling regenerative gas turbine (IC-CRGT) system. Aad为集热器太阳能总投射量,Qrad =QSoi/ηcol, ncol为集热器效率。 Aad the total projected amount of solar collectors, Qrad = QSoi / ηcol, ncol for the collector efficiency.

[0084] 化石能源节约率为同输出下参比系统相比,S0LCRGT系统中化石能源相对减少量: [0084] with the output lower fossil energy savings compared to the reference rate than the system, S0LCRGT system relative reduction in the amount of fossil energy:

[0085] SRf. 二K'.ef-H [0085] SRf. Two K'.ef-H

Wrr Wrr

--1 --1

Qf “ Qf "

[0086] 上式中,可以看作是太阳能替代化石能源的比例,单位太阳能热输入所替代的化石燃料量可表示为: [0086] In the above formula, can be seen as solar energy alternative to fossil energy ratio, the amount of fossil fuels replaced unit solar heat input can be expressed as:

[0087] Rf = [0087] Rf =

WnetUf WnetUf

Q Q

= SRf = SRf

sol sol

,Qi Q , Qi Q

1 _ χ 1 _ χ

= SRf so 丨 = SRf so Shu

so) so)

X X

sol sol

[0088] [0088]

[0089] [0089]

[0090] [0090]

[0091] [0091]

单位太阳能佣输入所替代的化石燃料量可表示为 The amount of fossil fuel input unit solar commission replaced can be expressed as

R R

fi fi

WnJn11Cf-Qf __ WnJn11Cf-Qf __

Qsol(\-TJTsol) I-TJTsol Qsol (\ - TJTsol) I-TJTsol

上述计算式中的符号为: Symbols in the formula above calculation is:

E 拥[kW] 1U 当量嫩率[%]EXL 毈[kW] Hsol 太阳热能净转5LHV 低位发热量[kJ/kg] Q 热量[kW] 下标 Rsen 水碳(莫尔)比 ex 透平排气余热Rf 每kJ太阳能热替代的化石燃料热 f 化石燃料Rfe 每kJ太阳能哄替代的化石燃料热 ref 参比系统SRf 化石能源节约率[%] rad 太阳辐照T 温度[°c] S 蒸汽Wmt 净出功[MW] sol 太阳热能Xstil 太阳能热输入份额[%] syn 合成气ΉαιΙ 集热器效率[%] 0 环境状态 E pro [kW] 1U equivalent tender rate [%] EXL infertile egg [kW] Hsol solar thermal transfer 5LHV net calorific value [kJ / kg] Q heat [kW] subscript Rsen water carbon (Mohr) than ex turbine exhaust gas per kJ of solar thermal heat Rf replace fossil fuels fossil fuel thermal f Rfe per kJ of solar thermal coax replace fossil fuels ref reference system SRf fossil energy savings rate [%] rad solar radiation T temperature [° c] S steam Wmt the net power [MW] sol solar thermal Xstil solar heat input share [%] syn syngas ΉαιΙ collector efficiency [%] 0 state of the environment

9 9

Claims (9)

1. 一种中低温太阳热能品位间接提升的方法,在化学回热循环中引入中低温太阳热能,提供蒸汽蒸发潜热从而转化为蒸汽内能,通过蒸汽参与重整反应转化为合成气化学能, 实现品位提升,最后在燃气轮机系统中实现热功转换。 The low-temperature solar thermal grade indirect promotion 1. A method of introducing chemical regenerative cycle in low temperature solar thermal, steam latent heat of evaporation and then into steam energy, the chemical reaction can be converted to synthesis gas by steam reforming of participation, implement quality improvement, and finally achieve thermal power conversion in the gas turbine system.
2. 一种实现权利要求1所述方法的装置,主要包括: 低压压气机:将空气升至一定压力;间冷器:对升至一定压力的空气进行冷却降温; 高压压气机:将空气升压至Brayton循环的最高压力; 燃料压气机:将燃料气体升压至重整反应的压力; 泵:将淡水升压至重整反应的压力;回热器:利用透平排气对水蒸汽与压缩后燃料气体的混合气、压缩后的空气进行加重整器:由烟气供热,使燃料与水蒸汽在压力下进行化学重整反应; 燃烧室:合成气和空气发生燃烧反应,得到高温气体; 燃气透平:高温燃气膨胀做功;发电机:与燃气透平连接,将燃气透平产生机械功转化为电能输出; 省煤器:由烟气供热,加热淡水流股至重整反应压力下的饱和态; 蒸发器:利用太阳能将重整反应压力下的饱和水蒸发; 太阳能集热器:收集太阳能;加压后的水送入省煤器加热至重整压力下的饱和水态,再进入太阳能集热器供热的蒸发器加热为蒸汽,与燃料压气机压缩后的燃料气体混合后送入回热器进一步被加热,随后进入重整器发生吸热反应,生成的合成气送入燃烧室;空气经低压压气机压缩后,送入间冷器进行冷却,再送入高压压气机压缩至Brayton循环的最高压力,随后送入回热器进一步被加热,最后送入燃烧室,与合成气燃烧生成高温燃气,送入燃气透平膨胀做功,实现动力输出。 2. A device realization method according to claim 1, including: a low pressure compressor: the air up to a certain pressure; intercooler: up to a certain pressure of air cooled cooling; high-pressure compressor: The air-lift pressure to the highest pressure Brayton cycle; compressor fuel: fuel gas boost to the reforming reaction pressure; pump: the fresh water pressure booster to the reforming reaction; regenerator: the use of the exhaust gas turbine and steam after the compressed mixture of fuel gas, the compressed air was applied reformer: heating from the flue gas, the fuel with steam at elevated pressure chemical reforming reaction; chamber: synthesis gas and air combustion reaction occurs to give high temperature gas; gas turbine: high-temperature gas expansion work; generator: connection to the gas turbine, the gas turbine to produce mechanical power into electrical energy output; economizer: from the flue gas heating, heating freshwater stream to the reformer saturated state reaction pressure; evaporator: the use of solar energy to the reforming reaction pressure of saturated water evaporation; solar collectors: to collect solar energy; pressurized water is fed to the economizer heating saturated water pressure at reforming state, and then enter the solar collector heating evaporator heating steam, fuel gas compressor is mixed with fuel into the compressed after the regenerator is further heated, and then entered the reformer synthesis endothermic reaction of the gas into the combustion chamber; after air compressed by the low-pressure compressor, into the intercooler for cooling, and then into the high pressure compressor is compressed to the maximum pressure Brayton cycle, and then into the regenerator is further heated, and finally into the combustion chamber , and synthesis gas combustion generates hot gas, into the gas turbine expansion work to achieve power output.
3.如权利要求2所述的装置,其中,重整器热侧进口为燃气透平排气,出口连接回热器,冷侧进口与回热器连接,出口连接燃烧室。 3. The apparatus according to claim 2, wherein the hot side of the reformer to import gas turbine exhaust outlet connection regenerator, the cold side of the regenerator is connected with the import and export connection chamber.
4.如权利要求2所述的装置,其中,回热器热侧进口与重整器连接,出口连接省煤器, 冷侧进口与高压压气机、燃料气体与蒸汽的混合室连接,出口分别连接燃烧室、重整器。 4. The apparatus of claim 2, wherein the hot side of the regenerator inlet and reformer connected to the outlet connection economizer, cold side inlet connection with the high-pressure compressor, fuel gas and steam mixing chamber outlet respectively connecting the combustion chamber, reformer.
5.如权利要求2所述的装置,其中,蒸发器所需热量由太阳能集热器提供,进口与省煤器相连,出口蒸汽与压缩后燃料气体进行混合。 5. The apparatus of claim 2, wherein the evaporator heat required is provided by solar collectors, imports and economizer connected to the fuel gas is mixed with steam outlet compression.
6.如权利要求2所述的装置,其中,省煤器热侧进口与回热器连接,冷侧出口连接蒸发器,进口与泵相连。 6. The apparatus of claim 2, wherein the hot side economizer import and the regenerator is connected, the cold side of the evaporator outlet connector, import and connected to the pump.
7.如权利要求2所述的装置,其中,压缩空气的低压压气机和高压压气机之间布置了间冷器。 7. The apparatus of claim 2, wherein the intercooler is arranged between the low pressure compressor and high pressure air compressor.
8.如权利要求2所述的装置,其中,空气采用了间冷压缩。 8. The apparatus as claimed in claim 2, wherein the air used between cold compression.
9.如权利要求2所述的装置,其中,回热器的冷侧布置了压缩后燃料气体与水蒸汽的混合气体、压缩后的空气两股物流。 9. The apparatus of claim 2, wherein the cold side of the regenerator arranged a compressed gas mixture of fuel gas and steam, compressed air after the two streams.

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102797650A (en) * 2011-05-27 2012-11-28 中国科学院工程热物理研究所 Low-CO2-emisison solar energy and methanol complementary thermodynamic cycle system and method
CN102562313A (en) * 2012-01-11 2012-07-11 哈尔滨工程大学 Chemically recuperated cycle gas turbine
CN102562313B (en) 2012-01-11 2014-04-16 哈尔滨工程大学 Chemically recuperated cycle gas turbine
CN103245087A (en) * 2012-02-14 2013-08-14 中国科学院工程热物理研究所 Indirect intermediate-temperature chemical energy storage device for solar heat on basis of chemical-looping combustion
CN103373705A (en) * 2012-04-17 2013-10-30 中国科学院工程热物理研究所 Method and device for improving grade of medium-and-low-temperature solar thermal power and integrally separating CO2
CN103373705B (en) * 2012-04-17 2015-03-25 中国科学院工程热物理研究所 Method and device for improving grade of medium-and-low-temperature solar thermal power and integrally separating CO2
CN103803491A (en) * 2012-11-13 2014-05-21 中国科学院工程热物理研究所 Mid-and-low temperature solar and fossil fuel thermo-chemical complementary power generation system and method
CN103925107A (en) * 2014-04-30 2014-07-16 郭远军 Heat energy power equipment and work doing method thereof
CN103925107B (en) * 2014-04-30 2015-07-01 郭远军 Heat energy power equipment and work doing method thereof
EP3181835A1 (en) * 2015-12-08 2017-06-21 Industrial Technology Research Institute Integrated combustion device power saving system

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