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WO2019080742A1 - 一种多耦合发电系统及发电方法 - Google Patents

一种多耦合发电系统及发电方法

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Publication number
WO2019080742A1
WO2019080742A1 PCT/CN2018/110340 CN2018110340W WO2019080742A1 WO 2019080742 A1 WO2019080742 A1 WO 2019080742A1 CN 2018110340 W CN2018110340 W CN 2018110340W WO 2019080742 A1 WO2019080742 A1 WO 2019080742A1
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WIPO (PCT)
Prior art keywords
steam
deaerator
power generation
heating
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2018/110340
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English (en)
French (fr)
Inventor
俞李斌
徐红波
吴猛
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Energy Engineering Group Zhejiang Electric Power Design Institute Co Ltd
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China Energy Engineering Group Zhejiang Electric Power Design Institute Co Ltd
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Publication of WO2019080742A1 publication Critical patent/WO2019080742A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
    • F22B33/18—Combinations of steam boilers with other apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F22D1/325—Schematic arrangements or control devices therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups
    • F22D11/02—Arrangements of feed-water pumps
    • F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler

Definitions

  • the invention relates to the field of energy utilization, and in particular to a multi-coupling power generation system and a power generation method.
  • the present invention provides a multi-coupling power generation system and a power generation method, which use a photothermal technology to preheat a demineralized water, and then send it to a deaerator for heating and deaeration to provide a solution to the boiler.
  • the technical problem of solar high-temperature industrial heat utilization realizes the perfect combination of solar heat utilization field and industrial heat energy field, which has high power generation efficiency, considerable economic benefits, and can greatly reduce pollutant emissions during power generation.
  • a multi-coupling power generation system includes:
  • a heating device for preheating the body of water
  • a deaerator connected to the heating device for further heating and deoxidizing the preheated body of water
  • a high pressure heater connected to the deaerator for further heating the water body heated and deaerated by the deaerator;
  • a boiler connected to the high-pressure heater for receiving water body and fuel heated by the high-pressure heater, and heating the water body by combustion of the fuel to generate steam;
  • a power generation assembly connected to the boiler for receiving the steam and generating electricity by the steam;
  • a heating assembly connected to the power generating component for conveying a portion of the exhausted steam after work by the power generating component to a heat demanding unit;
  • a condensing unit connected to the power generating unit for condensing a portion of the exhaust steam that has been subjected to work by the power generating unit to generate condensed water, and heating the condensed water to be re-delivered to the deaerator.
  • the heating device is a solar heater; the water body is demineralized water.
  • the deaerator is a built-in deaerator, a rotary membrane deaerator, a spray-filled deaerator, an atmospheric deaerator, a thermal deaerator, a water membrane deaerator, and a vacuum removal.
  • One or several of the oxygenators are included in the deaerator.
  • the fuel comprises one or more of biomass fuel, sludge, and coal combustion.
  • the high-pressure heater is further configured to receive a portion of the exhausted steam after work by the power generating component, and further heat the water body heated and deaerated by the deaerator by the exhaust steam.
  • the deaerator is further configured to receive a portion of the exhausted steam after work by the power generating component, and further heat the preheated water body by using the exhaust steam.
  • the multi-coupling power generation system further includes: a low pressure heater;
  • the condensing assembly includes: a condenser, and a steam seal cooler;
  • the condenser is configured to receive a portion of the exhausted steam after work by the power generating component, and condense the partially exhausted steam to generate condensed water;
  • the steam seal cooler is connected to the condenser and the power generating assembly for receiving a portion of the steam leaking from the power generating component and the condensed water, and heating the condensed water by using the leaked partial steam;
  • the low pressure heater is connected to the steam seal cooler and the power generation assembly for receiving condensed water heated by the steam seal cooler and a part of the exhaust steam after work by the power generation component, and utilizing the partially exhausted steam
  • the condensed water is reheated, and the reheated condensed water is re-delivered to the deaerator.
  • the power generation assembly includes a steam turbine and a generator.
  • the method further includes:
  • the partially exhausted steam after being worked by the power generating component is respectively sent back to the high pressure heater, the deaerator, the low pressure heater, and the steam seal cooler;
  • the invention uses the photothermal technology to preheat the demineralized water, and then sends it to the deaerator to heat and deoxidize and then supplies it to the boiler, solves the technical problem of solar high temperature industrial heat utilization, and realizes the perfect combination of the solar heat utilization field and the industrial heat energy field. It can reduce traditional energy sources, such as coal consumption, high power generation efficiency, considerable economic benefits, and can greatly reduce pollutant emissions during power generation.
  • FIG. 1 is a schematic structural view of a multi-coupling power generation system in Embodiment 1;
  • FIG. 2 is a flow chart showing the steps of power generation by the multi-coupling power generation system in the first embodiment in the second embodiment.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the multi-coupling power generation system in this embodiment includes:
  • the heating device 1 may preferably be a solar heater, more particularly preferably a solar heater having a superconducting heat collecting module, which has a better heating effect, and at the same time
  • the water body is demineralized water;
  • the deaerator 2 is connected to the heating device 1 for further heating and deoxidizing the preheated water body to prevent the oxygen in the water body from causing corrosion and damage to the equipment, thereby causing economic loss;
  • the deaerator 1 is a built-in deaerator, a rotary membrane deaerator, a spray-filled deaerator, an atmospheric deaerator, a thermal deaerator, a water membrane deaerator, and a vacuum deaerator. One or several of them;
  • a high-pressure heater 3 connected to the deaerator 2 for further heating the water body heated and deaerated by the deaerator 2; meanwhile, the deaerator 2 and the high-pressure heater 3 are disposed between a first pump body 100 for conveying water passing through the deaerator 2 to the boiler 4, and the first pump body 100 can also be used to adjust parameters such as flow rate and flow rate;
  • biomass fuel mainly refers to agricultural and forestry waste (tree branches, rice straw, wheat straw, etc.) and waste wood materials (construction waste template, waste wood furniture, decorative waste wood materials) Etc.), its low calorific value is between 2,500 kcal/kg and 3,500 kcal/kg.
  • biomass fuel mainly refers to agricultural and forestry waste (tree branches, rice straw, wheat straw, etc.) and waste wood materials (construction waste template, waste wood furniture, decorative waste wood materials) Etc.
  • 30,000 tons can replace and save 12,000 tons of standard coal, more than 40 million degrees of power supply, and reduce CO2 emissions by about 5,280 tons per year.
  • the annual emission reduction of SO2 is about 240 tons
  • the annual emission reduction of NOX is about 80 tons
  • the annual emission reduction of smoke and dust is about 180 tons. While making full use of the biomass fuel and creating huge economic benefits, it can greatly improve the efficiency and effectiveness of energy conservation and emission reduction, and help improve environmental quality.
  • the national sewage treatment plant (station) is currently producing annually. Sludge The water rate is 80%) 100 million tons or more.
  • sludge is used as a combustion raw material, and the sludge of the power plant is mixed, so that the sludge can be reduced, harmless, stabilized, and resourced.
  • Disposal targets reduce secondary pollution caused by sludge stacking, and effectively save land resources.
  • ash and slag produced by sludge incineration after high temperature can also be used as resource for building materials, which is good for building ecological environment. Have an important role;
  • the power generation assembly connected to the boiler 4 for receiving the steam and generating electricity by the steam; specifically, the power generation assembly includes a steam turbine 5 and a generator 10, wherein the steam turbine 5 is driven by the steam The generator 10 is operated to generate electric power, and the generated electric power is subsequently connected to the grid;
  • a heating assembly 6 which is connected to the power generating component (such as connected to the steam turbine 5), for transporting a part of the steam (ie, the exhaust steam) after the work of the power generating component to the heat demanding unit;
  • a condensing unit connected to the power generating unit for condensing a portion of the exhaust steam that has been subjected to work by the power generating unit to generate condensed water, and heating the condensed water to be re-delivered to the deaerator.
  • the high pressure heater 3 is further configured to receive a part of the exhausted steam (ie, the spent steam 2) after the work is performed by the power generating component, and The water body heated and deaerated by the deaerator 2 is further heated by the exhaust steam; at the same time, the deaerator 2 is further configured to receive a part of the steam (ie, the exhaust steam 3) after the power generation component is operated. The preheated water body is further heated by the spent steam.
  • the multi-coupling power generation system further includes: a low pressure heater 7;
  • the condensing assembly includes: a condenser 8, and a steam seal cooler 9;
  • the condenser 8 is configured to receive a portion of the exhausted steam (ie, the spent steam four) after the work of the power generating component, and condense the partially exhausted steam to generate condensed water;
  • the steam seal cooler 9 is connected to the condenser 8 and a power generating component (such as connected to the steam turbine 5) for receiving a part of the steam leaked from the power generating component (such as a part of steam generated by steam leakage of the steam turbine 5 shaft seal) And the condensed water, and heating the condensed water by using the leaked partial steam; similarly, the second pump body 101 is disposed between the steam seal cooler 9 and the condenser 8 The condensed water generated by the condenser 8 is sent to the steam seal cooler 9, and the second pump body 101 can also be used to adjust parameters such as flow rate and flow rate;
  • the low-pressure heater 7 is connected to the steam seal cooler 9 and a power generation assembly (e.g., connected to the steam turbine 5) for receiving condensed water heated by the steam seal cooler 9 and passing through the power generation assembly.
  • a power generation assembly e.g., connected to the steam turbine 5
  • a part of the exhausted steam i.e., the spent steam five
  • the condensed water is reheated by the partially exhausted steam, and the reheated condensed water is re-delivered to the deaerator 2.
  • the exhaust steam that has undergone work by the steam turbine 5 can be fully utilized. Specifically, it can be divided into five paths, respectively entering the deaerator 2 and the high pressure heater 3, The heat supply unit 6, the low pressure heater 7, and the condenser 8 are reused, and at the same time, part of the steam leaking out, such as steam generated by the steam seal of the steam turbine 5, can be recovered into the steam seal cooler 9 Reuse, in this way, the steam utilization efficiency can be greatly improved.
  • a 220t/h boiler is equipped with a 25MW back pressure turbine generator set with a water supply capacity of about 165t/h.
  • the solar heating device can increase the hydration temperature by an average of 8°C and operate at 6000 per year.
  • the hourly calculation will save about 1,250 tons of standard coal, more than 4 million kWh of electricity, reduce CO2 by about 550 tons per year, reduce SO2 by about 25 tons per year, reduce NOX by about 10 tons per year, and reduce emissions by about 18 tons per year. The energy saving effect is remarkable.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the embodiment further provides a method for generating power by using the above multi-coupling power generation system, which includes the following steps:
  • the above power generation method further includes:
  • the partially exhausted steam after being worked by the power generating component is respectively sent back to the high pressure heater, the deaerator, the low pressure heater, and the steam seal cooler;
  • the present invention uses photothermal technology to pre-heat the demineralized water, and then sends it to the deaerator for heating and deaeration to provide the boiler, which solves the technical problem of solar high-temperature industrial heat utilization, and realizes the field of solar thermal utilization and industrial thermal energy.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Physical Water Treatments (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

一种多耦合发电系统及发电方法，包括：加热装置（1）；除氧器（2）；高压加热器（3）；锅炉（4）；发电组件；供热组件（6）；以及冷凝组件。发电系统使用光热技术对除盐水进行预加热，再送入除氧器（2）加热除氧后提供给锅炉（4），解决了太阳能高温工业热利用的技术难题，实现太阳能热利用领域与工业热能领域的结合，可减少传统能源，如煤的消耗，发电效率高，同时可极大减少发电过程中的污染物排放量。

Description

一种多耦合发电系统及发电方法 技术领域
本发明涉及能源利用领域，具体涉及一种多耦合发电系统及发电方法。
背景技术
随着我国经济的快速发展，传统能源供给，如通过煤的燃烧产生电力的方式已不能满足环境保护的需要，并且我国幅员辽阔，其存在数量巨大的可以用资源，如生物质、污泥等，这些材料均可用于提供电力。
但现有技术中，尚没有出现将太阳能与上述生物质、污泥等材料一起联用发电，且发电效率高、经济效益可观的发电模式。
发明内容
针对上述现有技术中存在的问题，本发明提供了一种多耦合发电系统及发电方法，其使用光热技术对除盐水进行预加热，再送入除氧器加热除氧后提供给锅炉，解决了太阳能高温工业热利用的技术难题，实现太阳能热利用领域与工业热能领域的完美结合，其发电效率高，经济效益可观，同时可极大减少发电过程中的污染物排放量。
本发明解决上述技术问题所提供的方案如下：
一方面，提供一种多耦合发电系统，其包括：
加热装置，其用于对水体进行预加热；
除氧器，其连接所述加热装置，用于对经过预加热的水体进行进一步加热和除氧处理；
高压加热器，其连接所述的除氧器，用于对经过除氧器加热和除氧的水体进行进一步加热；
锅炉，其连接所述高压加热器，用于接收经高压加热器加热后的水体以及燃料，通过所述燃料的燃烧来对所述水体进行加热，产生蒸汽；
发电组件，其连接所述锅炉，用于接收所述蒸汽，并通过所述蒸汽发电；
供热组件，其连接所述发电组件，用于将经过所述发电组件做功后的部分乏汽输送至需热单位；
以及冷凝组件，其连接所述发电组件，用于将经过所述发电组件做功后的部分乏汽进行冷凝，产生冷凝水，且将所述冷凝水加热后重新输送至所述除氧器。
优选的，所述加热装置为太阳能加热器；所述水体为除盐水。
优选的，所述除氧器为内置式除氧器、旋膜式除氧器、喷雾填料式除氧器、大气式除氧器、热力式除氧器、水膜式除氧器以及真空除氧器中的一种或几种。
优选的，所述燃料包括生物质燃料、污泥以及燃煤中的一种或几种。
优选的，所述高压加热器还用于接收经过所述发电组件做功后的部分乏汽，并利用该乏汽对经过除氧器加热和除氧的水体进行进一步加热。
优选的，所述除氧器还用于接收经过所述发电组件做功后的部分乏汽，并利用该乏汽对经过预加热的水体进行进一步加热。
优选的，所述多耦合发电系统还包括：低压加热器；所述冷凝组件包括：冷凝器，以及汽封冷却器；
所述冷凝器用于接收经过所述发电组件做功后的部分乏汽，并对该部分乏汽进行冷凝，并产生冷凝水；
所述汽封冷却器连接所述冷凝器以及发电组件，用于接收所述发电组件漏出的部分蒸汽以及所述冷凝水，并利用所述漏出的部分蒸汽对所述冷凝水进行加热；
所述低压加热器连接所述汽封冷却器以及发电组件，用于接收被所述汽封冷却器加热后的冷凝水以及经过所述发电组件做功后的部分乏汽，并利用该部分乏汽对所述冷凝水进行再次加热，并将再次加热后的冷凝水重新输送至所述除氧器。
优选的，所述发电组件包括汽轮机以及发电机。
另一方面，还提供一种利用上述多耦合发电系统进行发电的方法，其包括如下步骤：
S1、通过加热装置对水体进行预加热；
S2、将经过预加热的水体输送至除氧器，通过除氧器对经过预加热的水体进行进一步加热和除氧处理；
S3、将经除氧器加热和除氧处理后的水体以及燃料输送至锅炉，通过所述燃料的燃烧来对水体进行加热，产生蒸汽；
以及S4、将发电组件连接所述锅炉，使得所述发电组件接收所述蒸汽，并通过所述蒸汽发电。
优选的，还包括：
S5、利用供热组件将经过所述发电组件做功后的部分乏汽输送至需热单位；
S6、将经过所述发电组件做功后的部分乏汽分别输送回所述高压加热器、除氧器、低压加热器以及汽封冷却器；
以及S7、利用冷凝组件将经过所述发电组件做功后的部分乏汽进行冷凝，产生冷凝水，且将所述冷凝水依次经所述汽封冷却器以及低压加热器加热后重新输送至所述除氧器。
本发明技术方案所带来的效果：
本发明使用光热技术对除盐水进行预加热，再送入除氧器加热除氧后提供给锅炉，解决了太阳能高温工业热利用的技术难题，实现太阳能热利用领域与工业热能领域的完美结合，可减少传统能源，如煤的消耗，发电效率高，经济效益可观，同时可极大减少发电过程中的污染物排放量。
附图说明
图1是实施例一中多耦合发电系统的结构示意图；
图2是实施例二中利用实施例一中的多耦合发电系统进行发电的步骤流程图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
实施例一：
如图1所示，本实施例中的多耦合发电系统，其包括：
加热装置1，其用于对水体进行预加热；所述加热装置1可优选为太阳能加热器，更特别优选为具有超导集热模块的太阳能加热器，其加热效果更佳，同时，所述水体为除盐水；
除氧器2，其连接所述加热装置1，用于对经过预加热的水体进行进一步加热和除氧处理，避免水体中的氧对设备造成腐蚀和破坏，产生经济损失；本实施例中，所述除氧器1为内置式除氧器、旋膜式除氧器、喷雾填料式除氧器、大气式除氧器、热力式除氧器、水膜式除氧器以及真空除氧器中的一种或几种；
高压加热器3，其连接所述的除氧器2，用于对经过除氧器2加热和除氧的水体进行进一步加热；同时，所述除氧器2与高压加热器3之间设有第一泵体100，其用于将经过所述除氧器2的水体输送至所述锅炉4，且所述第一泵体100还可用于调节流量、流速等参数；
锅炉4，其连接所述高压加热器3，用于接收经高压加热器3加热后的水体以及燃料，通过所述燃料的燃烧来对所述水体进行加热，产生蒸汽；所述燃料包括生物质燃料、污泥以及燃煤中的一种或几种；生物质燃料主要指农林废弃物(树枝、稻秆、麦秆等)和废旧木质料(建筑废旧模板、废旧木质家俱、装饰废旧木质料等)，其低位热值在2500大卡/公斤～3500大卡/公斤，本实施例中，每小时可燃用生物质燃料5吨，按年运行6000小时计算，则年消耗所述生物质燃料30000吨，可替代、节约标煤12000吨，多供电4000万度，同时年减排CO2约5280吨，年减排SO2约240吨，年减排NOX约80吨，年减排烟尘约180吨，在对所述生物质燃料进行充分利用、创造 巨大经济效益的同时，能极大的提高节能减排的效率和效果，有利于改善环境质量；同时，全国污水处理厂(站)目前每年产生污泥(含水率80％)1亿吨以上，本实施例中由于将污泥作为燃烧原料，采用电厂污泥掺烧的方式，可实现污泥“减量化、无害化、稳定化、资源化”处置目标，减少因污泥堆放造成的二次污染，并有效节约土地资源，进一步的，污泥经高温焚烧后产生的灰、渣还可作为建材原料资源化利用，其对于建设良好的生态环境具有重要作用；
发电组件，其连接所述锅炉4，用于接收所述蒸汽，并通过所述蒸汽发电；具体的，所述发电组件包括汽轮机5以及发电机10，其中，汽轮机5被所述蒸汽驱动，带动所述发电机10运转，进而产生电力，且产生的电力后续并网输送；
供热组件6，其连接所述发电组件(如连接到汽轮机5)，用于将经过所述发电组件做功后的部分乏汽(即乏汽一)输送至需热单位；
以及冷凝组件，其连接所述发电组件，用于将经过所述发电组件做功后的部分乏汽进行冷凝，产生冷凝水，且将所述冷凝水加热后重新输送至所述除氧器。
进一步的，为增加对于蒸汽的利用效率，争取达到最佳的节能减排效果，所述高压加热器3还用于接收经过所述发电组件做功后的部分乏汽(即乏汽二)，并利用该乏汽对经过除氧器2加热和除氧的水体进行进一步加热；同时，所述除氧器2还用于接收经过所述发电组件做功后的部分乏汽(即乏汽三)，并利用该乏汽对经过预加热的水体进行进一步加热。
更进一步的，所述多耦合发电系统还包括：低压加热器7；所述冷凝组件包括：冷凝器8，以及汽封冷却器9；
所述冷凝器8用于接收经过所述发电组件做功后的部分乏汽(即乏汽四)，并对该部分乏汽进行冷凝，并产生冷凝水；
所述汽封冷却器9则连接所述冷凝器8以及发电组件(如连接到汽轮机5)，用于接收所述发电组件漏出的部分蒸汽(如因汽轮机5轴封漏汽产生的部分蒸汽)以及所述冷凝水，并利用所述漏出的部分蒸汽对所述冷凝水进行加热；类似的，所述汽封冷却器9与所述冷凝器8之间设有第二泵体101，其用于将所述冷凝器8产生的冷凝水输送至所述汽封冷却器9，且所述第二泵体101还可用于调节流量、流速等参数；
此外，所述低压加热器7则连接所述汽封冷却器9以及发电组件(如连接到汽轮机5)，用于接收被所述汽封冷却器9加热后的冷凝水以及经过所述发电组件做功后的部分乏汽(即乏汽五)，并利用该部分乏汽对所述冷凝水进行再次加热，并将再次加热后的冷凝水重新输送至所述除氧器2。
由此可见，本实施例中，所述发电组件中，经过汽轮机5做功的乏汽可以被充分利用，具体的，其可以被分为五路，分别进入除氧器2，高压加热器3，供热组件6、低压加热器7以及冷凝器8中被再次利用，同时，漏出的部分蒸汽如因汽轮机5轴封漏汽产生的部分蒸汽也可被回收至所述汽封冷却器9中被再次利用，通过该方式，可极大提高蒸汽利用效率。
例如，本实施例中，一台220t/h锅炉配套一台25MW背压式汽轮发电机组，补水量约为165t/h，利用太阳能加热装置可将补水温度平均提高8℃，按年运行6000小时计算，则年节约标煤约1250吨，多供电400万度以上，年减排CO2约550吨，年减排SO2约25吨，年减排NOX约10吨，年减排烟尘约18吨，节能效果显著。
实施例二：
如图2所示，本实施例还提供了一种利用上述多耦合发电系统进行发电的方法，其包括如下步骤：
S1、通过加热装置对水体进行预加热；
S2、将经过预加热的水体输送至除氧器，通过除氧器对经过预加热的水体进行进一步加热和除氧处理；
S3、将经除氧器加热和除氧处理后的水体以及燃料输送至锅炉，通过所述燃料的燃烧来对水体进行加热，产生蒸汽；
以及S4、将发电组件连接所述锅炉，使得所述发电组件接收所述蒸汽，并通过所述蒸汽发电。
进一步的，为增加蒸汽利用效率，上述发电方法还包括：
S5、利用供热组件将经过所述发电组件做功后的部分乏汽输送至需热单位；
S6、将经过所述发电组件做功后的部分乏汽分别输送回所述高压加热器、除氧器、低压加热器以及汽封冷却器；
以及S7、利用冷凝组件将经过所述发电组件做功后的部分乏汽进行冷凝，产生冷凝水，且将所述冷凝水依次经所述汽封冷却器以及低压加热器加热后重新输送至所述除氧器。
需要说明的是，且上述实施例一、二中的技术特征可进行随意组合，且组合而成的技术方案均属于本发明的保护范围。
综上所述，本发明使用光热技术对除盐水进行预加热，再送入除氧器加热除氧后提供给锅炉，解决了太阳能高温工业热利用的技术难题，实现太阳能热利用领域与工业热能领域的完美结合，把新能源直接应用于热力发电领域，实现新能源对传统能源 的替代，可减少传统能源，如煤的消耗，发电效率高，经济效益可观，同时可极大减少发电过程中的污染物排放量。
以上所述仅为本发明的较佳实施例，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种多耦合发电系统，其特征在于，包括：
    加热装置，其用于对水体进行预加热；
    除氧器，其连接所述加热装置，用于对经过预加热的水体进行进一步加热和除氧处理；
    高压加热器，其连接所述的除氧器，用于对经过除氧器加热和除氧的水体进行进一步加热；
    锅炉，其连接所述高压加热器，用于接收经高压加热器加热后的水体以及燃料，通过所述燃料的燃烧来对所述水体进行加热，产生蒸汽；
    发电组件，其连接所述锅炉，用于接收所述蒸汽，并通过所述蒸汽发电；
    供热组件，其连接所述发电组件，用于将经过所述发电组件做功后的部分乏汽输送至需热单位；
    以及冷凝组件，其连接所述发电组件，用于将经过所述发电组件做功后的部分乏汽进行冷凝，产生冷凝水，且将所述冷凝水加热后重新输送至所述除氧器。
  2. 如权利要求1所述的多耦合发电系统，其特征在于，所述加热装置为太阳能加热器；所述水体为除盐水。
  3. 如权利要求1所述的多耦合发电系统，其特征在于，所述除氧器为内置式除氧器、旋膜式除氧器、喷雾填料式除氧器、大气式除氧器、热力式除氧器、水膜式除氧器以及真空除氧器中的一种或几种。
  4. 如权利要求1所述的多耦合发电系统，其特征在于，所述燃料包括生物质燃料、污泥以及燃煤中的一种或几种。
  5. 如权利要求1所述的多耦合发电系统，其特征在于，所述高压加热器还用于接收经过所述发电组件做功后的部分乏汽，并利用该乏汽对经过除氧器加热和除氧的水体进行进一步加热。
  6. 如权利要求1所述的多耦合发电系统，其特征在于，所述除氧器还用于接收经过所述发电组件做功后的部分乏汽，并利用该乏汽对经过预加热的水体进行进一步加热。
  7. 如权利要求1所述的多耦合发电系统，其特征在于，所述多耦合发电系统还包括：低压加热器；所述冷凝组件包括：冷凝器，以及汽封冷却器；
    所述冷凝器用于接收经过所述发电组件做功后的部分乏汽，并对该部分乏汽进行冷凝，并产生冷凝水；
    所述汽封冷却器连接所述冷凝器以及发电组件，用于接收所述发电组件漏出的部分蒸汽以及所述冷凝水，并利用所述漏出的部分蒸汽对所述冷凝水进行加热；
    所述低压加热器连接所述汽封冷却器以及发电组件，用于接收被所述汽封冷却器加热后的冷凝水以及经过所述发电组件做功后的部分乏汽，并利用该部分乏汽对所述冷凝水进行再次加热，并将再次加热后的冷凝水重新输送至所述除氧器。
  8. 如权利要求1-7任一项所述的多耦合发电系统，其特征在于，所述发电组件包括汽轮机以及发电机。
  9. 一种利用权利要求7所述的多耦合发电系统进行发电的方法，其特征在于，包括如下步骤：
    S1、通过加热装置对水体进行预加热；
    S2、将经过预加热的水体输送至除氧器，通过除氧器对经过预加热的水体进行进一步加热和除氧处理；
    S3、将经除氧器加热和除氧处理后的水体以及燃料输送至锅炉，通过所述燃料的燃烧来对水体进行加热，产生蒸汽；
    以及S4、将发电组件连接所述锅炉，使得所述发电组件接收所述蒸汽，并通过所述蒸汽发电。
  10. 如权利要求9所述的方法，其特征在于，还包括：
    S5、利用供热组件将经过所述发电组件做功后的部分乏汽输送至需热单位；
    S6、将经过所述发电组件做功后的部分乏汽分别输送回所述高压加热器、除氧器、低压加热器以及汽封冷却器；
    以及S7、利用冷凝组件将经过所述发电组件做功后的部分乏汽进行冷凝，产生冷凝水，且将所述冷凝水依次经所述汽封冷却器以及低压加热器加热后重新输送至所述除氧器。
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