CN209724494U - A gas turbine combined cycle low temperature flue gas waste heat utilization system - Google Patents
A gas turbine combined cycle low temperature flue gas waste heat utilization system Download PDFInfo
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- 239000002918 waste heat Substances 0.000 title claims abstract description 51
- 239000003546 flue gas Substances 0.000 title claims abstract description 34
- 239000007789 gas Substances 0.000 title claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 94
- 238000002485 combustion reaction Methods 0.000 claims abstract description 29
- 238000005057 refrigeration Methods 0.000 claims description 41
- 238000009833 condensation Methods 0.000 claims 8
- 230000005494 condensation Effects 0.000 claims 8
- 239000000498 cooling water Substances 0.000 claims 4
- 238000010025 steaming Methods 0.000 claims 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003345 natural gas Substances 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 description 17
- 238000010248 power generation Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
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Abstract
Description
技术领域technical field
本实用新型涉及发热工设备技术领域，具体涉及一种燃机联合循环低温烟气余热利用系统。The utility model relates to the technical field of heating equipment, in particular to a gas turbine combined cycle low-temperature flue gas waste heat utilization system.
背景技术Background technique
随着我国大力开发和引进天然气资源、优化能源结构的能源策略的执行，以天然气为一次能源的燃气轮机冷热电联供系统在我国正快速发展。普通燃气轮机热电冷联产系统包括燃气轮机发电机组，余热锅炉，蒸汽轮机或吸收式制冷装置；系统的最终烟气排放温度通常在130℃左右，这部分烟气还有占总热能 10％左右的热利用潜力，不回收利用是一种巨大的浪费。With the implementation of the energy strategy of vigorously developing and introducing natural gas resources and optimizing the energy structure in my country, the combined cooling, heating and power system of gas turbines using natural gas as the primary energy is developing rapidly in China. Ordinary gas turbine cogeneration system includes gas turbine generator set, waste heat boiler, steam turbine or absorption refrigeration device; the final flue gas discharge temperature of the system is usually around 130°C, and this part of the flue gas still has about 10% of the total heat energy. Utilizing potential, not recycling is a colossal waste.
实用新型内容Utility model content
本实用新型的目的在于针对现有技术中的不足之处，提供一种燃机联合循环低温烟气余热利用系统。The purpose of the utility model is to provide a gas turbine combined cycle low-temperature flue gas waste heat utilization system aiming at the deficiencies in the prior art.
为达此目的，本实用新型采用以下技术方案：一种燃机联合循环低温烟气余热利用系统，包括燃气发电装置、余热锅炉、蒸汽轮机发电装置和制冷装置；To achieve this purpose, the utility model adopts the following technical solutions: a gas turbine combined cycle low-temperature flue gas waste heat utilization system, including a gas-fired power generation device, a waste heat boiler, a steam turbine power generation device and a refrigeration device;
所述燃气发电装置包括压气机、燃烧室和发电机；所述压气机的入口与大气相连通，其出口与燃烧室的入口相连，所述燃烧室的出口与发电机相连；所述燃烧室的入口还与天然气管口相连通；The gas-fired power generation device includes a compressor, a combustion chamber and a generator; the inlet of the compressor is connected to the atmosphere, the outlet of the combustion chamber is connected to the inlet of the combustion chamber, and the outlet of the combustion chamber is connected to the generator; the combustion chamber The inlet is also connected with the natural gas pipe port;
所述余热锅炉内设置有第一换热器、第二换热器和第三换热器；The waste heat boiler is provided with a first heat exchanger, a second heat exchanger and a third heat exchanger;
所述余热锅炉包括烟气进口、下蒸汽出口和下冷凝水进口；所述余热锅炉的烟气进口连通所述发电机的排气出口；所述下蒸汽出口和下冷凝水出口连接于所述第一换热器；The waste heat boiler includes a flue gas inlet, a lower steam outlet and a lower condensed water inlet; the flue gas inlet of the waste heat boiler is connected to the exhaust outlet of the generator; the lower steam outlet and the lower condensed water outlet are connected to the first heat exchanger;
所述蒸汽轮机发电装置包括蒸汽机和凝汽器；所述余热锅炉的下蒸汽出口连通所述蒸汽机的进气口，所述蒸汽机具有第一出气口和第二出气口，所述蒸汽机的第一出气口连通于所述制冷装置，所述蒸汽机的第二出气口连通于所述凝汽器的入气口，所述凝汽器的出水口连通于所述下冷凝水进口；所述制冷装置的回水口连接于所述凝汽器的入水口；The steam turbine power generation device includes a steam engine and a condenser; the lower steam outlet of the waste heat boiler communicates with the air inlet of the steam engine, the steam engine has a first gas outlet and a second gas outlet, and the first gas outlet of the steam engine The gas outlet is connected to the refrigeration device, the second gas outlet of the steam engine is connected to the gas inlet of the condenser, and the water outlet of the condenser is connected to the lower condensed water inlet; The water return port is connected to the water inlet of the condenser;
所述余热锅炉还包括上热水出口、第一冷凝水进口、上蒸汽出口和第二冷凝水进口；所述上蒸汽出口和第二冷凝水进口连接于所述第二换热器，所述上热水出口和所述第一冷凝水进口连接于所述第三换热器；The waste heat boiler also includes an upper hot water outlet, a first condensed water inlet, an upper steam outlet and a second condensed water inlet; the upper steam outlet and the second condensed water inlet are connected to the second heat exchanger, and the The upper hot water outlet and the first condensed water inlet are connected to the third heat exchanger;
所述上蒸汽出口和所述上热水出口也连通于所述制冷装置，所述制冷装置的回水口分别连接于所述第一冷凝水进口和第二冷凝水进口。The upper steam outlet and the upper hot water outlet are also connected to the refrigeration device, and the water return port of the refrigeration device is respectively connected to the first condensed water inlet and the second condensed water inlet.
优选的，所述制冷装置包括制冷模块和热交换模块；Preferably, the refrigeration device includes a refrigeration module and a heat exchange module;
所述制冷模块用于产生冷源，所述热交换模块用于产生热源。The refrigeration module is used to generate a cold source, and the heat exchange module is used to generate a heat source.
优选的，还包括热负荷组；所述热负荷组包括热水入口和冷水出口；所述热交换模块的热水出口连通于所述热负荷组的热水入口，所述热负荷组的冷水出口连通于所述热交换模块的回水口。Preferably, it also includes a heat load group; the heat load group includes a hot water inlet and a cold water outlet; the hot water outlet of the heat exchange module is connected to the hot water inlet of the heat load group, and the cold water of the heat load group The outlet is connected to the water return port of the heat exchange module.
优选的，还包括冷负荷组；Preferably, it also includes a cooling load group;
所述冷负荷组包括冷水入口和出水口；所述制冷模块的冷水出口连通于所述冷负荷组的冷水入口，所述冷负荷组的出水口连通于所述制冷模块的回水口。The cooling load group includes a cold water inlet and a water outlet; the cold water outlet of the refrigeration module is connected to the cold water inlet of the cooling load group, and the water outlet of the cooling load group is connected to the return water port of the refrigeration module.
优选的，还包括气热交换器；Preferably, it also includes a gas heat exchanger;
所述气热交换器的入水口连通于所述制冷模块的冷水出口，所述气热的出水口连通于所述制冷模块的回水口；The water inlet of the air heat exchanger is connected to the cold water outlet of the refrigeration module, and the air heat water outlet is connected to the water return port of the refrigeration module;
所述气热交换器还包括进气口和出气口，所述气热交换器的进气口与大气相连通，所述气热交换器的出气口连通于所述压气机的入口。The air heat exchanger also includes an air inlet and an air outlet, the air inlet of the air heat exchanger communicates with the atmosphere, and the air outlet of the air heat exchanger communicates with the inlet of the compressor.
本实用新型的有益效果：本实用新型的烟气经过所述余热锅炉内的第二换热器，经过热交换，从上蒸汽出口得到约为的蒸汽，然后也输进所述制冷装置中，从而能够使所述余热锅炉的上层的烟气能够充分利用起来。如果余热锅炉上层的烟气温度没有达到100℃，这些烟气经过所述第三换热器的换热之后，可以加热成热水，也输进所述制冷装置中，也能够将余热充分利用起来，所以不论余热锅炉的废气的温度如何，都能够很好地将废气的温度利用起来。再者，当所述制冷装置需要充分制冷时，这时需要输入的热源就多，可以将第一换热器和第二换热器的蒸汽输进所述制冷装置当中，达到充分制冷的效果。当不需充分制冷时，可以仅将所述第二换热器的蒸汽输进所述制冷装置中。Beneficial effects of the utility model: the flue gas of the utility model passes through the second heat exchanger in the waste heat boiler, undergoes heat exchange, and obtains steam of approx. Therefore, the flue gas in the upper layer of the waste heat boiler can be fully utilized. If the temperature of the flue gas in the upper layer of the waste heat boiler does not reach 100°C, the flue gas can be heated into hot water after being exchanged by the third heat exchanger, and then input into the refrigeration device, and the waste heat can also be fully utilized Therefore, regardless of the temperature of the exhaust gas from the waste heat boiler, the temperature of the exhaust gas can be well utilized. Furthermore, when the refrigerating device needs to be fully refrigerated, more heat sources need to be input at this time, and the steam from the first heat exchanger and the second heat exchanger can be input into the refrigerating device to achieve the effect of sufficient cooling . When sufficient cooling is not required, only the steam from the second heat exchanger can be fed into the refrigeration device.
附图说明Description of drawings
下面结合附图和实施例对本实用新型进一步说明。Below in conjunction with accompanying drawing and embodiment the utility model is further described.
图1是本实用新型的一个实施例的整体结构流程示意图。Fig. 1 is a schematic flow chart of the overall structure of an embodiment of the present invention.
其中：燃气发电装置1，压气机11，燃烧室12，发电机13，余热锅炉2，第一换热器21，第二换热器22，第三换热器23，蒸汽轮机发电装置3，蒸汽机 31，凝汽器32，制冷装置4，制冷模块41，热交换模块42，热负荷组5，冷负荷组6，气热交换器7。Among them: gas-fired power generation device 1, compressor 11, combustion chamber 12, generator 13, waste heat boiler 2, first heat exchanger 21, second heat exchanger 22, third heat exchanger 23, steam turbine power generation device 3, A steam engine 31 , a condenser 32 , a refrigeration device 4 , a refrigeration module 41 , a heat exchange module 42 , a heat load group 5 , a cooling load group 6 , and an air heat exchanger 7 .
具体实施方式Detailed ways
下面结合附图并通过具体实施方式来进一步说明本实用新型的技术方案。The technical scheme of the utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.
一种燃机联合循环低温烟气余热利用系统，包括燃气发电装置1、余热锅炉 2、蒸汽轮机发电装置3和制冷装置4；A gas turbine combined cycle low-temperature flue gas waste heat utilization system, including a gas-fired power generation device 1, a waste heat boiler 2, a steam turbine power generation device 3 and a refrigeration device 4;
所述燃气发电装置1包括压气机11、燃烧室12和发电机13；所述压气机11的入口与大气相连通，其出口与燃烧室12的入口相连，所述燃烧室12的出口与发电机13相连；所述燃烧室12的入口还与天然气管口相连通；The gas-fired power generation device 1 includes a compressor 11, a combustion chamber 12 and a generator 13; the inlet of the compressor 11 is connected to the atmosphere, and its outlet is connected to the inlet of the combustion chamber 12, and the outlet of the combustion chamber 12 is connected to the power generation Machine 13 links to each other; The inlet of described combustion chamber 12 also links to each other with natural gas nozzle;
所述余热锅炉2内设置有第一换热器21、第二换热器22和第三换热器23；The waste heat boiler 2 is provided with a first heat exchanger 21, a second heat exchanger 22 and a third heat exchanger 23;
所述余热锅炉2包括烟气进口、下蒸汽出口和下冷凝水进口；所述余热锅炉2的烟气进口连通所述发电机13的排气出口；所述下蒸汽出口和下冷凝水出口连接于所述第一换热器21；The waste heat boiler 2 includes a flue gas inlet, a lower steam outlet and a lower condensed water inlet; the flue gas inlet of the waste heat boiler 2 is connected to the exhaust outlet of the generator 13; the lower steam outlet is connected to the lower condensed water outlet in the first heat exchanger 21;
所述蒸汽轮机发电装置3包括蒸汽机31和凝汽器32；所述余热锅炉2的下蒸汽出口连通所述蒸汽机31的进气口，所述蒸汽机31具有第一出气口和第二出气口，所述蒸汽机31的第一出气口连通于所述制冷装置4，所述蒸汽机31的第二出气口连通于所述凝汽器32的入气口，所述凝汽器32的出水口连通于所述下冷凝水进口；所述制冷装置4的回水口连接于所述凝汽器32的入水口；The steam turbine power generation device 3 includes a steam engine 31 and a condenser 32; the lower steam outlet of the waste heat boiler 2 is connected to the air inlet of the steam engine 31, and the steam engine 31 has a first gas outlet and a second gas outlet, The first air outlet of the steam engine 31 is communicated with the refrigeration device 4, the second air outlet of the steam engine 31 is communicated with the air inlet of the condenser 32, and the water outlet of the condenser 32 is communicated with the The condensed water inlet is described below; the water return port of the refrigeration unit 4 is connected to the water inlet of the condenser 32;
所述余热锅炉2还包括上热水出口、第一冷凝水进口、上蒸汽出口和第二冷凝水进口；所述上蒸汽出口和第二冷凝水进口连接于所述第二换热器22，所述上热水出口和所述第一冷凝水进口连接于所述第三换热器23；The waste heat boiler 2 also includes an upper hot water outlet, a first condensed water inlet, an upper steam outlet and a second condensed water inlet; the upper steam outlet and the second condensed water inlet are connected to the second heat exchanger 22, The upper hot water outlet and the first condensed water inlet are connected to the third heat exchanger 23;
所述上蒸汽出口和所述上热水出口也连通于所述制冷装置4，所述制冷装置 4的回水口分别连接于所述第一冷凝水进口和第二冷凝水进口。The upper steam outlet and the upper hot water outlet are also connected to the refrigeration device 4, and the water return port of the refrigeration device 4 is connected to the first condensed water inlet and the second condensed water inlet respectively.
本实用新型的燃机联合循环低温烟气余热利用系统的工作过程如下：所述压气机11将空气进行压缩，然后空气被泵进所述燃烧室12中，天然气和空气进行混合在所述燃烧室12内燃烧，后在发电机13中进行发电，发电随之产生的烟气送进所述余热锅炉2内，这部分的烟气的温度约为530-540℃，所述余热锅炉2内设置有三套换热器，第一换热器21位于余热锅炉2的下方，第二换热器22和第三换热器23位于余热锅炉2的上方，通过热交换，第二换热器22能够产生蒸汽进所述蒸汽机31中进行发电。The working process of the gas turbine combined cycle low-temperature flue gas waste heat utilization system of the utility model is as follows: the compressor 11 compresses the air, and then the air is pumped into the combustion chamber 12, and natural gas and air are mixed in the combustion chamber. Combustion in the chamber 12, and then generate electricity in the generator 13, and the flue gas generated by the power generation is sent into the waste heat boiler 2, and the temperature of this part of the flue gas is about 530-540°C. There are three sets of heat exchangers, the first heat exchanger 21 is located below the waste heat boiler 2, the second heat exchanger 22 and the third heat exchanger 23 are located above the waste heat boiler 2, through heat exchange, the second heat exchanger 22 The steam can be generated into the steam engine 31 to generate electricity.
所述余热锅炉2上层的烟气温度约为200℃，当前是直接将这部分的烟气直接排走的，而没有得到丝毫的利用。而本实用新型的烟气经过所述余热锅炉2 内的第二换热器22，经过热交换，从上蒸汽出口得到约为的蒸汽，然后也输进所述制冷装置4中，从而能够使所述余热锅炉2的上层的烟气能够充分利用起来。如果余热锅炉2上层的烟气温度没有达到100℃，这些烟气经过所述第三换热器23的换热之后，可以加热成热水，也输进所述制冷装置4中，也能够将余热充分利用起来，所以不论余热锅炉2的废气的温度如何，都能够很好地将废气的温度利用起来。The temperature of the flue gas at the upper layer of the waste heat boiler 2 is about 200° C. Currently, this part of the flue gas is directly discharged without any utilization. And the flue gas of the present utility model passes through the second heat exchanger 22 in the waste heat boiler 2, through heat exchange, obtains steam of about 100% from the upper steam outlet, and then also enters in the described refrigeration device 4, thereby can make The flue gas in the upper layer of the waste heat boiler 2 can be fully utilized. If the temperature of the flue gas on the upper layer of the waste heat boiler 2 does not reach 100°C, the flue gas can be heated into hot water after being exchanged by the third heat exchanger 23, and can also be input into the refrigeration device 4, which can also be converted into hot water. The waste heat is fully utilized, so no matter what the temperature of the waste gas from the waste heat boiler 2 is, the temperature of the waste gas can be well utilized.
再者，当所述制冷装置4需要充分制冷时，这时需要输入的热源就多，可以将第一换热器21和第二换热器22的蒸汽输进所述制冷装置4当中，达到充分制冷的效果。当不需充分制冷时，可以仅将所述第二换热器22的蒸汽输进所述制冷装置4中。Furthermore, when the refrigerating device 4 needs to be fully refrigerated, more heat sources need to be input at this time, and the steam from the first heat exchanger 21 and the second heat exchanger 22 can be input into the refrigerating device 4 to achieve full cooling effect. When sufficient refrigeration is not required, only the steam from the second heat exchanger 22 can be input into the refrigeration device 4 .
更进一步地，所述制冷装置4包括制冷模块41和热交换模块42；Furthermore, the refrigeration device 4 includes a refrigeration module 41 and a heat exchange module 42;
所述制冷模块41用于产生冷源，所述热交换模块42用于产生热源。The refrigeration module 41 is used to generate a cold source, and the heat exchange module 42 is used to generate a heat source.
更进一步地，还包括热负荷组5；所述热负荷组5包括热水入口和冷水出口；所述热交换模块42的热水出口连通于所述热负荷组5的热水入口，所述热负荷组5的冷水出口连通于所述热交换模块42的回水口。Furthermore, it also includes a heat load group 5; the heat load group 5 includes a hot water inlet and a cold water outlet; the hot water outlet of the heat exchange module 42 is connected to the hot water inlet of the heat load group 5, and the The cold water outlet of the heat load group 5 is connected to the water return port of the heat exchange module 42 .
所述热负荷组5主要服务于需要用热的客户，所述热负荷组5的形式多样，使用者根据实际情况自由选择。The heat load group 5 mainly serves customers who need heat. The heat load group 5 has various forms, and users can choose freely according to actual conditions.
更进一步地，还包括冷负荷组6；Further, it also includes cooling load group 6;
所述冷负荷组6包括冷水入口和出水口；所述制冷模块41的冷水出口连通于所述冷负荷组6的冷水入口，所述冷负荷组6的出水口连通于所述制冷模块 41的回水口。The cooling load group 6 includes a cold water inlet and a water outlet; the cold water outlet of the refrigeration module 41 is connected to the cold water inlet of the cooling load group 6, and the water outlet of the cooling load group 6 is connected to the cooling module 41. Backwater.
所述冷负荷组6主要服务于需要用冷的客户，所述冷负荷组6的形式多样，例如可以为数据中心等。The cooling load group 6 mainly serves customers who need cooling, and the cooling load group 6 can be in various forms, for example, it can be a data center.
更进一步地，还包括气热交换器7；Furthermore, an air heat exchanger 7 is also included;
所述气热交换器7的入水口连通于所述制冷模块的冷水出口，所述气热的出水口连通于所述制冷模块的回水口；The water inlet of the air heat exchanger 7 is connected to the cold water outlet of the refrigeration module, and the air heat water outlet is connected to the water return port of the refrigeration module;
所述气热交换器7还包括进气口和出气口，所述气热交换器7的进气口与大气相连通，所述气热交换器7的出气口连通于所述压气机11的入口。The air heat exchanger 7 also includes an air inlet and an air outlet, the air inlet of the air heat exchanger 7 communicates with the atmosphere, and the air outlet of the air heat exchanger 7 communicates with the compressor 11 Entrance.
所述气热交换器7能够将大气进一步冷却，从而利于提高燃烧室12的燃烧效率，从而提交发电机13的发电效率。The air heat exchanger 7 can further cool the atmosphere, thereby improving the combustion efficiency of the combustion chamber 12 and contributing to the power generation efficiency of the generator 13 .
以上内容仅为本实用新型的较佳实施例，对于本领域的普通技术人员，依据本实用新型的思想，在具体实施方式及应用范围上均会有改变之处，本说明书内容不应理解为对本实用新型的限制。The above content is only a preferred embodiment of the present utility model. For those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation and scope of application. The content of this specification should not be understood as Limitations on the Invention.
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