技术领域technical field
本发明属于太阳能热发电技术领域，尤其涉及一种利用地热水预热冷凝水的多能互补发电系统及方法。The invention belongs to the technical field of solar thermal power generation, and in particular relates to a multi-energy complementary power generation system and method for preheating condensed water by using geothermal water.
背景技术Background technique
太阳能发电和地热发电都属于可再生的清洁能源发电，但都存在各自较为明显的缺陷。太阳能聚光成本较高，发电量受福射强度不稳定的限制；而地热能发电成本较低，发电量受最高温度的限制，且效率不高。对于地热能，引入一种高品位的能源作为其顶部循环，将有利于原系统的功率输出并且在一定程度上提高系统热效率；而对于太阳能，地热能是一个稳定的能量输出，这将能够克服因为太阳辐照不稳定带来的发电输出不稳定，并且地热能的投资较太阳能低，联合循环能够共用某些设备，因此从成本角度考虑也有利。所以，将太阳能与地热能进行联合运行将是一种高效利用可再生能源的方式，也是能源多级利用原则的体现。Both solar power generation and geothermal power generation are renewable clean energy power generation, but both have obvious defects. The cost of concentrating solar energy is high, and the power generation is limited by the instability of radiation intensity; while the cost of geothermal power generation is low, the power generation is limited by the maximum temperature, and the efficiency is not high. For geothermal energy, introducing a high-grade energy as its top cycle will benefit the power output of the original system and improve the thermal efficiency of the system to a certain extent; while for solar energy, geothermal energy is a stable energy output, which will be able to overcome Because the power generation output caused by unstable solar radiation is unstable, and the investment of geothermal energy is lower than that of solar energy, the combined cycle can share some equipment, so it is also advantageous from the perspective of cost. Therefore, the joint operation of solar energy and geothermal energy will be a way to efficiently utilize renewable energy, and it is also a manifestation of the principle of multi-level utilization of energy.
发明内容Contents of the invention
有鉴于此，本发明的主要目的在于提供一种利用地热水预热冷凝水的多能互补发电系统及方法，实现了联合高效利用可再生能源的目的。In view of this, the main purpose of the present invention is to provide a multi-energy complementary power generation system and method for preheating condensed water by using geothermal water, so as to achieve the purpose of joint and efficient utilization of renewable energy.
为了达到上述目的，本发明采用如下技术方案：In order to achieve the above object, the present invention adopts following technical scheme:
一种利用地热水预热冷凝水的多能互补发电系统，包括太阳能聚光集热器1，依次连接在太阳能聚光集热器1传热工质出口的过热器10、蒸汽发生器9和预热器8，预热器8的传热工质出口与太阳能聚光集热器1传热工质入口连通；A multi-energy complementary power generation system using geothermal water to preheat condensed water, comprising a solar concentrating heat collector 1, a superheater 10 and a steam generator 9 connected in turn to the heat transfer medium outlet of the solar concentrating heat collector 1 And the preheater 8, the heat transfer working medium outlet of the preheater 8 is communicated with the heat transfer working medium inlet of the solar concentrator heat collector 1;
还包括冷凝器4，冷凝器4的给水出口依次连接凝结水泵11、地热水加热器5、除氧器7、给水泵12、高压加热器6、预热器8、蒸汽发生器9、过热器10和汽轮机2，汽轮机2连接发电机3；所述汽轮机2的排汽口连接冷凝器4的排气入口，汽轮机2的第二抽汽口连接除氧器7的抽汽入口，汽轮机2的第三抽汽口连接地热水加热器5的抽汽入口，汽轮机2的第一抽汽口连接述高压加热器6的抽汽入口；所述高压加热器6的疏水出口连接除氧器7的疏水入口；It also includes a condenser 4, the feed water outlet of the condenser 4 is sequentially connected to the condensate pump 11, the geothermal water heater 5, the deaerator 7, the feed water pump 12, the high pressure heater 6, the preheater 8, the steam generator 9, the superheater Device 10 and steam turbine 2, steam turbine 2 is connected with generator 3; The exhaust port of described steam turbine 2 is connected with the exhaust inlet of condenser 4, and the second extraction port of steam turbine 2 is connected with the extraction steam inlet of deaerator 7, and steam turbine 2 The third extraction port of the steam turbine 2 is connected to the steam extraction inlet of the geothermal water heater 5, and the first steam extraction port of the steam turbine 2 is connected to the extraction steam inlet of the high-pressure heater 6; the drain outlet of the high-pressure heater 6 is connected to the deaerator 7's hydrophobic inlet;
还包括地热井13，地热井13的地热水出口连接地热水加热器5的地热水入口，地热水加热器5的地热水出口连接回灌井14的地热水入口。It also includes a geothermal well 13, the geothermal water outlet of the geothermal well 13 is connected to the geothermal water inlet of the geothermal water heater 5, and the geothermal water outlet of the geothermal water heater 5 is connected to the geothermal water inlet of the reinjection well 14.
所述利用地热水预热冷凝水的多能互补发电系统的多能互补发电方法，利用太阳能聚光集热器1聚集太阳热能，并将传热工质加热，传热工质依次经过过热器10、蒸汽发生器9和预热器8，将热量传递给工质给水，然后返回太阳能聚光集热器1；被冷凝器4冷凝后的给水，经过凝结水泵11升压后，在地热水加热器5中被地热水预热，然后进入除氧器7，与回热抽汽、疏水汇集，然后在给水泵12中升压，进入高压加热器6，然后依次经过预热器8、蒸汽发生器9和过热器10被传热工质加热成过热蒸汽，进入汽轮机2中推动叶片做功，然后带动发电机3发电；做功后的蒸汽从汽轮机2下部的排汽口排出，在冷凝器4内冷凝，重新凝结成水，完成一个循环；地热水从地热井13中出来，在地热水加热器5中加热凝结水，然后回灌到回灌井14。The multi-energy complementary power generation method of the multi-energy complementary power generation system using geothermal water to preheat the condensed water uses the solar concentrating heat collector 1 to gather solar thermal energy, and heats the heat transfer working medium, and the heat transfer working medium is successively overheated 10, steam generator 9 and preheater 8, transfer the heat to the working medium feed water, and then return to the solar collector 1; the feed water condensed by the condenser 4, after being boosted by the condensate pump 11, is discharged to the ground The hot water heater 5 is preheated by the geothermal water, then enters the deaerator 7, gathers with the regenerative steam extraction, and drains, then boosts the pressure in the feed water pump 12, enters the high pressure heater 6, and then passes through the preheater in turn 8. The steam generator 9 and the superheater 10 are heated by the heat transfer medium to become superheated steam, enter the steam turbine 2 to push the blades to do work, and then drive the generator 3 to generate electricity; the steam after work is discharged from the exhaust port at the lower part of the steam turbine 2, and then Condensate in the condenser 4 and re-condense into water to complete a cycle; geothermal water comes out of the geothermal well 13, heats the condensed water in the geothermal water heater 5, and then refills into the refill well 14.
和现有技术相比较，本发明具有以下优点：Compared with the prior art, the present invention has the following advantages:
1、采用地热水作为低压加热器的热源，取消了汽轮机低压抽汽，增加了汽轮机出功。1. Geothermal water is used as the heat source of the low-pressure heater, the low-pressure steam extraction of the steam turbine is canceled, and the work of the steam turbine is increased.
2、低温低压的地热水利用太阳能热发电系统实现了品位提升，相当于产生较高温度压力的蒸汽进入汽轮机做功。2. The grade of low-temperature and low-pressure geothermal water has been improved by using the solar thermal power generation system, which is equivalent to generating higher temperature and pressure steam into the steam turbine to do work.
3、本发明广泛适用于各种太阳能热发电系统，例如槽式、塔式、碟式、线性菲涅尔式太阳能热发电系统。3. The present invention is widely applicable to various solar thermal power generation systems, such as trough-type, tower-type, dish-type, and linear Fresnel-type solar thermal power generation systems.
附图说明Description of drawings
图1为本发明利用地热水预热冷凝水的多能互补发电系统及方法流程图。Fig. 1 is a flow chart of the multi-energy complementary power generation system and method for preheating condensed water using geothermal water according to the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
如图1所示，本发明利用地热水预热冷凝水的多能互补发电系统，包括：太阳能聚光集热器1，依次连接在太阳能聚光集热器1传热工质出口的过热器10、蒸汽发生器9和预热器8，预热器的传热工质出口与太阳能聚光集热器1传热工质入口连通；As shown in Figure 1, the multi-energy complementary power generation system utilizing geothermal water to preheat condensed water in the present invention includes: a solar concentrating heat collector 1, which is sequentially connected to the superheating system at the outlet of the heat transfer working medium of the solar concentrating heat collector 1 Device 10, steam generator 9 and preheater 8, the heat transfer working medium outlet of the preheater communicates with the solar concentrating heat collector 1 heat transfer working medium inlet;
还包括冷凝器4，冷凝器4的给水出口依次连接凝结水泵11、地热水加热器5、除氧器7、给水泵12、高压加热器6、预热器8、蒸汽发生器9、过热器10和汽轮机2，汽轮机2连接发电机3；所述汽轮机2的排汽口连接冷凝器4的排气入口，汽轮机2的第二抽汽口连接除氧器7的抽汽入口，汽轮机2的第三抽汽口连接地热水加热器5的抽汽入口，汽轮机2的第一抽汽口连接述高压加热器6的抽汽入口；所述高压加热器6的疏水出口连接除氧器7的疏水入口；It also includes a condenser 4, the feed water outlet of the condenser 4 is sequentially connected to the condensate pump 11, the geothermal water heater 5, the deaerator 7, the feed water pump 12, the high pressure heater 6, the preheater 8, the steam generator 9, the superheater Device 10 and steam turbine 2, steam turbine 2 is connected with generator 3; The exhaust port of described steam turbine 2 is connected with the exhaust inlet of condenser 4, and the second extraction port of steam turbine 2 is connected with the extraction steam inlet of deaerator 7, and steam turbine 2 The third extraction port of the steam turbine 2 is connected to the steam extraction inlet of the geothermal water heater 5, and the first steam extraction port of the steam turbine 2 is connected to the extraction steam inlet of the high-pressure heater 6; the drain outlet of the high-pressure heater 6 is connected to the deaerator 7's hydrophobic inlet;
还包括地热井13，地热井13的地热水出口连接所述地热水加热器5的地热水入口，地热水加热器5的地热水出口连接回灌井14的地热水入口。It also includes a geothermal well 13, the geothermal water outlet of the geothermal well 13 is connected to the geothermal water inlet of the geothermal water heater 5, and the geothermal water outlet of the geothermal water heater 5 is connected to the geothermal water inlet of the recharge well 14 .
如图1所示，本发明利用地热水预热冷凝水的多能互补发电方法，利用太阳能聚光集热器1聚集太阳热能，并将传热工质加热，传热工质依次经过过热器10、蒸汽发生器9和预热器8，将热量传递给工质给水，然后返回太阳能聚光集热器1；被冷凝器4冷凝后的给水，经过凝结水泵11升压后，在地热水加热器5中被地热水预热，然后进入除氧器7，与回热抽汽、疏水汇集，然后在给水泵12中升压，进入高压加热器6，然后依次经过预热器8、蒸汽发生器9和过热器10被传热工质加热成过热蒸汽，进入汽轮机2中推动叶片做功，然后带动发电机3发电；做功后的蒸汽从汽轮机2下部的排汽口排出，在冷凝器4内冷凝，重新凝结成水，完成一个循环；地热水从地热井13中出来，在地热水加热器5中加热凝结水，然后回灌到回灌井14。As shown in Figure 1, the present invention utilizes geothermal water to preheat the condensed water multi-energy complementary power generation method, utilizes the solar concentrating heat collector 1 to collect solar thermal energy, and heats the heat transfer working medium, and the heat transfer working medium is successively overheated 10, steam generator 9 and preheater 8, transfer the heat to the working medium feed water, and then return to the solar collector 1; the feed water condensed by the condenser 4, after being boosted by the condensate pump 11, is discharged to the ground The hot water heater 5 is preheated by the geothermal water, then enters the deaerator 7, gathers with the regenerative steam extraction, and drains, then boosts the pressure in the feed water pump 12, enters the high pressure heater 6, and then passes through the preheater in turn 8. The steam generator 9 and the superheater 10 are heated by the heat transfer medium to become superheated steam, enter the steam turbine 2 to push the blades to do work, and then drive the generator 3 to generate electricity; the steam after work is discharged from the exhaust port at the lower part of the steam turbine 2, and then Condensate in the condenser 4 and re-condense into water to complete a cycle; geothermal water comes out of the geothermal well 13, heats the condensed water in the geothermal water heater 5, and then refills into the refill well 14.
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| CN201810089168.2ACN108266341A (en) | 2018-01-30 | 2018-01-30 | A kind of multi-energies hybrid power generating system and method using the pre- hot condensed water of GEOTHERMAL WATER |
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| CN201810089168.2ACN108266341A (en) | 2018-01-30 | 2018-01-30 | A kind of multi-energies hybrid power generating system and method using the pre- hot condensed water of GEOTHERMAL WATER |
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