CN204200282U - A kind of space division system compression device drive unit - Google Patents
A kind of space division system compression device drive unit Download PDFInfo
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- CN204200282U CN204200282U CN201420674947.6U CN201420674947U CN204200282U CN 204200282 U CN204200282 U CN 204200282U CN 201420674947 U CN201420674947 U CN 201420674947U CN 204200282 U CN204200282 U CN 204200282U
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- 230000006835 compression Effects 0.000 title claims abstract description 41
- 238000007906 compression Methods 0.000 title claims abstract description 41
- 238000002309 gasification Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000004821 distillation Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 abstract description 56
- 239000007789 gas Substances 0.000 abstract description 46
- 239000002918 waste heat Substances 0.000 abstract description 29
- 239000003245 coal Substances 0.000 abstract description 22
- 239000000446 fuel Substances 0.000 abstract description 9
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 description 16
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000003345 natural gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000002737 fuel gas Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002912 waste gas 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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- 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]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
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Abstract
一种空分系统压缩设备驱动装置，包括整体煤气化联合循环系统中原有的空分系统、气化炉、燃气轮机和余热锅炉以及新增的小型汽轮机、小型汽轮机凝汽器和凝结水泵；空分系统主要包括压缩设备和精馏系统；压缩设备转轴与小型汽轮机转轴相连，精馏系统产品输出口与气化炉气体输入口连通，气化炉产品输出口与燃气轮机燃料输入口连通，燃气轮机输出口与余热锅炉燃料输入口连通，余热锅炉蒸汽输出口与小型汽轮机输入口连通，小型汽轮机输出口与小型汽轮机凝汽器输入口连通，小型汽轮机凝汽器输出口与余热锅炉给水入口通过凝结水泵连通；本实用新型通过优化空分系统压缩设备的驱动方式，降低投资维护费用、提高设备可靠性、减少空分系统能耗。
A driving device for air separation system compression equipment, including the original air separation system, gasifier, gas turbine and waste heat boiler in the integrated coal gasification combined cycle system, as well as the newly added small steam turbine, small steam turbine condenser and condensate pump; air separation The system mainly includes compression equipment and rectification system; the shaft of the compression equipment is connected with the shaft of the small steam turbine, the product output port of the rectification system is connected with the gas input port of the gasifier, the product output port of the gasifier is connected with the fuel input port of the gas turbine, and the output port of the gas turbine It is connected to the fuel input port of the waste heat boiler, the steam output port of the waste heat boiler is connected to the input port of the small steam turbine, the output port of the small steam turbine is connected to the input port of the condenser of the small steam turbine, and the output port of the condenser of the small steam turbine is connected to the feed water inlet of the waste heat boiler through the condensate pump ; The utility model reduces investment and maintenance costs, improves equipment reliability, and reduces energy consumption of the air separation system by optimizing the drive mode of the compression equipment of the air separation system.
Description
技术领域technical field
本实用新型涉及小型汽轮机驱动空分系统压缩设备领域，具体涉及一种空分系统压缩设备驱动装置。The utility model relates to the field of compression equipment of an air separation system driven by a small steam turbine, in particular to a driving device for the compression equipment of an air separation system.
背景技术Background technique
在未来较长时期内，我国都将是以燃煤发电为主的格局。整体煤气化联合循环发电是一种先进的洁净煤燃烧发电技术，它具有高效、环保的特点，被认为是未来最具发展潜力的洁净煤技术之一。因此，为促进可持续发展，整体煤气化联合循环发电将在我国中远期的燃煤发电中扮演重要角色。For a long period of time in the future, my country will be dominated by coal-fired power generation. Integrated coal gasification combined cycle power generation is an advanced clean coal combustion power generation technology. It has the characteristics of high efficiency and environmental protection, and is considered to be one of the clean coal technologies with the most development potential in the future. Therefore, in order to promote sustainable development, integrated coal gasification combined cycle power generation will play an important role in my country's medium and long-term coal-fired power generation.
空分系统是整体煤气化联合循环发电系统中耗能最高的单元，据统计，空分系统大约会消耗全厂厂用电的70％-85％。在空分系统中，空气压缩设备是最主要的耗能设备，其能耗占到空分系统能耗的80％～90％。空分系统中的压缩设备分别由单独的电动机驱动，这种方式存在以下问题：(1)由于空气压缩设备所配备的电动机、变压器以及自动控制设备的容量较高，因而整套装置的投资费用高；(2)一般泵、压缩机等增压设备在启动时，启动力矩较大，为了适应启动转矩，启动电机的功率一般都要比设备的额定功率高10％左右，那么当设备正常运行时，电动机就经常处于轻载运行，电动机本身的容量得不到充分发挥，使得电动机运行效率低、性能不好，从而增加运行费用；(3)电动机属于连续工作的电机，在正常工作时，电机的转速一般恒定不变，因而其负载可调节范围较小。当整体煤气化联合循环发电系统运行在较低负荷时(比如50％)，空分系统会浪费一部分负载，经济性差。The air separation system is the unit with the highest energy consumption in the integrated coal gasification combined cycle power generation system. According to statistics, the air separation system consumes about 70%-85% of the power consumption of the whole plant. In the air separation system, air compression equipment is the most important energy-consuming equipment, and its energy consumption accounts for 80% to 90% of the energy consumption of the air separation system. The compression equipment in the air separation system is driven by a separate motor. This method has the following problems: (1) Due to the high capacity of the motor, transformer and automatic control equipment equipped with the air compression equipment, the investment cost of the entire device is high. ; (2) Generally, when booster equipment such as pumps and compressors start, the starting torque is relatively large. In order to adapt to the starting torque, the power of the starting motor is generally about 10% higher than the rated power of the equipment. At this time, the motor is often in light-load operation, and the capacity of the motor itself cannot be fully utilized, resulting in low operating efficiency and poor performance of the motor, thereby increasing operating costs; (3) The motor is a continuous-working motor. The speed of the motor is generally constant, so its load adjustable range is small. When the integrated coal gasification combined cycle power generation system operates at a lower load (such as 50%), the air separation system will waste a part of the load, and the economy is poor.
可见，寻求一种新型的空分系统压缩设备驱动方式，以改善常规电动机驱动方式所带来的能耗高、投资高的缺陷，从而保障整体煤气化联合循环发电系统经济、安全运行是非常有意义的。It can be seen that it is very useful to seek a new driving method for the compression equipment of the air separation system to improve the defects of high energy consumption and high investment caused by the conventional motor driving method, so as to ensure the economical and safe operation of the overall coal gasification combined cycle power generation system. meaningful.
发明内容Contents of the invention
为了解决上述现有技术存在的问题，本实用新型的目的在于提供一种空分系统压缩设备驱动装置，通过优化整体煤气化联合循环发电系统中空分系统压缩设备的驱动方式，从而降低投资维护费用、提高设备可靠性、减少空分系统能耗。In order to solve the problems existing in the above-mentioned prior art, the purpose of this utility model is to provide a driving device for air separation system compression equipment, which can reduce investment and maintenance costs by optimizing the driving mode of air separation system compression equipment in the integrated coal gasification combined cycle power generation system , Improve equipment reliability, reduce air separation system energy consumption.
为达到以上目的，本实用新型采用如下技术方案：In order to achieve the above object, the utility model adopts the following technical solutions:
一种空分系统压缩设备驱动装置，包括整体煤气化联合循环系统中原有的空分系统1、气化炉3、燃气轮机4和余热锅炉5以及新增的小型汽轮机2、小型汽轮机凝汽器6和凝结水泵7；所述空分系统主要包括压缩设备8和精馏系统9；所述压缩设备8的转轴与小型汽轮机2的转轴相连接，精馏系统9的产品输出口与气化炉3的气体输入口相连通，气化炉3的产品输出口与燃气轮机4的燃料输入口相连通，燃气轮机4的输出口与余热锅炉5的燃料输入口相连通，余热锅炉5的蒸汽输出口与小型汽轮机2的输入口相连通，小型汽轮机2的输出口与小型汽轮机凝汽器6的输入口相连通，小型汽轮机凝汽器6的输出口与余热锅炉5的给水入口通过凝结水泵7相连通。A driving device for air separation system compression equipment, including the original air separation system 1, gasification furnace 3, gas turbine 4 and waste heat boiler 5 in the integrated coal gasification combined cycle system, and the newly added small steam turbine 2 and small steam turbine condenser 6 And condensate pump 7; Described air separation system mainly comprises compression equipment 8 and rectification system 9; The gas input port of the gasification furnace 3 is connected with the gas input port of the gasifier 4, the output port of the gas turbine 4 is connected with the fuel input port of the waste heat boiler 5, and the steam output port of the waste heat boiler 5 is connected with the small The input port of the steam turbine 2 is connected, the output port of the small steam turbine 2 is connected with the input port of the small steam turbine condenser 6, and the output port of the small steam turbine condenser 6 is connected with the feedwater inlet of the waste heat boiler 5 through the condensate pump 7.
所述空分系统1包括多个压缩设备8，多个压缩设备8中的部分或全部通过小型汽轮机2同轴带动，或根据容量需求分别配备小型汽轮机2及小型汽轮机凝汽器6。The air separation system 1 includes multiple compression devices 8, some or all of which are coaxially driven by small steam turbines 2, or equipped with small steam turbines 2 and small steam turbine condensers 6 according to capacity requirements.
所述空分系统1中的2个压缩设备8由小型汽轮机2同轴带动，所述小型汽轮机2的功率为40MW。The two compression devices 8 in the air separation system 1 are coaxially driven by a small steam turbine 2, and the power of the small steam turbine 2 is 40MW.
所述小型汽轮机2的转速和进汽量能够根据负载大小进行调节。The speed and steam intake of the small steam turbine 2 can be adjusted according to the load.
本实用新型和现有技术相比，具有如下优点：Compared with the prior art, the utility model has the following advantages:
1)降低投资。采用常规电动机驱动方式要满足启动要求，必须配备比压缩设备额定功率稍高的电动机，除此之外，还需要同时配备启动变压器、启动锅炉等设备。而应用本实用新型装置驱动压缩设备，由于在启动时采取了先启动燃气轮机的方式——通过燃烧天然气来解决启动时空分系统的蒸汽和能量供给问题，从而无需安装启动锅炉，只需配备同压缩设备额定功率相同的小型汽轮机及其辅助设备。因此，应用本实用新型装置驱动压缩设备，可以大幅度节省初期投资。1) Reduce investment. In order to meet the start-up requirements with the conventional motor drive method, a motor with a slightly higher rated power than the compression equipment must be equipped. In addition, start-up transformers, start-up boilers and other equipment must be equipped at the same time. However, when the device of the utility model is used to drive the compression equipment, since the method of starting the gas turbine is adopted at the start-up to solve the problem of steam and energy supply of the space separation system during start-up by burning natural gas, there is no need to install a start-up boiler, and only need to be equipped with the same compressor Small steam turbines and their auxiliary equipment with the same rated power of the equipment. Therefore, using the device of the utility model to drive compression equipment can greatly save initial investment.
2)提高能源利用效率。电动机消耗的是电能，汽轮机消耗的是热能，热能向电能转换时有一定的转换效率，因此相比于常规电动机驱动方式，本实用新型装置驱动方式的能量利用率较高。不仅如此，由于正常运行时电动机一般保持转速不变，因此导致空分系统的负荷调节范围很小，当机组低负荷运行时，空分系统就会浪费一部分出力，这种运行方式很不经济。而汽轮机可以通过调节进汽量来调节出力，调节范围较宽，从而使得空分系统能够跟随负荷大小调节出力，提高了能源利用效率，节约了成本，提升了电站运行经济性。2) Improve energy utilization efficiency. The electric motor consumes electric energy, and the steam turbine consumes thermal energy, which has a certain conversion efficiency when converting thermal energy to electric energy. Therefore, compared with the conventional motor driving mode, the utility model device driving mode has a higher energy utilization rate. Not only that, since the motor generally maintains a constant speed during normal operation, the load adjustment range of the air separation system is very small. When the unit is operating at low load, the air separation system will waste part of its output, which is very uneconomical. The steam turbine can adjust the output by adjusting the steam intake, and the adjustment range is wide, so that the air separation system can adjust the output according to the load, which improves the energy utilization efficiency, saves costs, and improves the operation economy of the power station.
附图说明Description of drawings
图1为本实用新型实施例的空分压缩设备驱动装置示意图。Fig. 1 is a schematic diagram of an air separation compression equipment driving device according to an embodiment of the present invention.
图2为本实用新型实施例的整体煤气化联合循环发电系统流程示意图。Fig. 2 is a schematic flow chart of an integrated coal gasification combined cycle power generation system according to an embodiment of the present invention.
具体实施方式Detailed ways
以下结合附图及具体实施例，对本实用新型作进一步的详细描述。Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.
如图1所示，本实施例一种空分系统压缩设备驱动装置，包括整体煤气化联合循环系统中原有的空分系统1、气化炉3、燃气轮机4和余热锅炉5以及新增的小型汽轮机2、小型汽轮机凝汽器6和凝结水泵7；空分系统主要包括压缩设备8和精馏系统9；整体煤气化联合循环系统中原有的空分系统1、气化炉3、燃气轮机4和余热锅炉5按其在整体煤气化联合循环发电中的原有方式连接，所述小型汽轮机2转轴与压缩设备8转轴相连接，小型汽轮机2输入口与余热锅炉5中压蒸汽输出口相连通，小型汽轮机2输出口与小型汽轮机凝汽器6输入口相连通，小型汽轮机凝汽器6的输出口与余热锅炉5的给水入口通过凝结水泵7相连通。As shown in Figure 1, the present embodiment is an air separation system compression equipment driving device, including the original air separation system 1, gasifier 3, gas turbine 4 and waste heat boiler 5 in the integrated coal gasification combined cycle system and the newly added small Steam turbine 2, small steam turbine condenser 6 and condensate pump 7; the air separation system mainly includes compression equipment 8 and rectification system 9; the original air separation system 1, gasifier 3, gas turbine 4 and The waste heat boiler 5 is connected according to its original method in the integrated coal gasification combined cycle power generation, the rotating shaft of the small steam turbine 2 is connected with the rotating shaft of the compression equipment 8, the input port of the small steam turbine 2 is connected with the medium-pressure steam output port of the waste heat boiler 5, The output port of the small steam turbine 2 is connected with the input port of the small steam turbine condenser 6 , and the output port of the small steam turbine condenser 6 is connected with the feed water inlet of the waste heat boiler 5 through the condensate pump 7 .
本实用新型的工作原理为：当整体煤气化联合循环系统处于运行工况时，所述驱动装置中空分系统1用于为气化炉3提供氧气和氮气产品，借助这些气体产品，气化炉3将煤粉颗粒转化为可燃烧气体，并送入燃气轮机4燃烧；燃料气体在燃气轮机4燃烧室燃烧膨胀后进入燃气轮机4的透平带动负载做功，做完功的乏气进入余热锅炉5并将余热锅炉5中的介质水加热成过热蒸汽；从余热锅炉5出来的部分过热蒸汽进入小型汽轮机2膨胀做功，从而带动空分系统1压缩设备转轴转动；在小型汽轮机2中做完功的乏汽进入小型汽轮机凝汽器6，经冷凝换热后变成水，并通过凝结水泵7送入余热锅炉5完成部分工质的循环；当整体煤气化联合循环系统处于冷态启动工况时，为改变空分系统1的启动依赖启动锅炉的现状，将改变原有的启动方式——空分系统1最先启动，而将启动先后顺序变成燃气轮机4、余热锅炉5、主蒸汽轮机、小型汽轮机2、空分系统1和气化炉3；由于空分系统1要先于气化炉3启动，气化炉3无法为空分系统1提供燃料，因此由天然气代替气化炉3输出的燃料气体进入燃气轮机4燃烧为空分系统1的启动提供能量；为保证燃气轮机4有较高的做功效率，保持燃气轮机4工作在较高负荷工况下；天然气在燃气轮机4燃烧室燃烧后进入燃气轮机4的透平带动燃气轮机4发电机做功，做完功的乏气进入余热锅炉5带动余热锅炉启动；余热锅炉5产生过热蒸汽后带动小型汽轮机2和主蒸汽轮机启动，从而带动空分系统1压缩设备启动；在空分系统1启动完毕后，气化炉3启动，在达到可以为燃气轮机提供燃料的条件后，所述系统转入运行工况。The working principle of the utility model is: when the integrated coal gasification combined cycle system is in the operating condition, the air separation system 1 in the drive device is used to provide oxygen and nitrogen products for the gasifier 3, and by means of these gas products, the gasifier 3 Convert the pulverized coal particles into combustible gas, and send it to the gas turbine 4 for combustion; the fuel gas enters the turbine of the gas turbine 4 after burning and expanding in the combustion chamber of the gas turbine 4 to drive the load to do work, and the waste gas that has done the work enters the waste heat boiler 5 and The medium water in the waste heat boiler 5 is heated into superheated steam; part of the superheated steam from the waste heat boiler 5 enters the small steam turbine 2 to expand and do work, thereby driving the rotation shaft of the compression equipment of the air separation system 1; Enter the small steam turbine condenser 6, become water after condensing and exchanging heat, and send it to the waste heat boiler 5 through the condensed water pump 7 to complete the circulation of part of the working fluid; when the overall coal gasification combined cycle system is in the cold start-up condition, for To change the status quo that the start-up of air separation system 1 depends on the start-up boiler will change the original start-up method—air separation system 1 is started first, and the start-up sequence will be changed to gas turbine 4, waste heat boiler 5, main steam turbine, and small steam turbine 2. Air separation system 1 and gasifier 3; since air separation system 1 starts before gasifier 3, gasifier 3 cannot provide fuel for air separation system 1, so the fuel gas output by gasifier 3 is replaced by natural gas Enter gas turbine 4 to burn to provide energy for the start-up of air separation system 1; in order to ensure that gas turbine 4 has a higher work efficiency, keep gas turbine 4 working under a higher load condition; natural gas enters the gas turbine 4 through the combustion chamber of gas turbine 4 after combustion Drive the gas turbine 4 generator to do work, and the exhausted gas after the work enters the waste heat boiler 5 to drive the waste heat boiler to start; after the waste heat boiler 5 generates superheated steam, it drives the small steam turbine 2 and the main steam turbine to start, thereby driving the compression equipment of the air separation system 1 to start; After the start-up of the air separation system 1 is completed, the gasifier 3 is started, and after reaching the condition that fuel can be provided for the gas turbine, the system is turned into an operating condition.
基于本实用新型装置的某250MW整体煤气化联合循环发电系统流程如图2所示。除所述包含在空分系统压缩设备驱动装置中的设备外，还包括主蒸汽轮机10、主凝结水系统11、燃气轮机发电机12和主蒸汽轮机发电机13。精馏系统9产品输出口与气化炉3气体输入口对应连通，气化炉3产品输出口与燃气轮机4燃料输入口相连通，燃气轮机4转轴与燃气轮机发电机12转轴相连；余热锅炉5燃料输入口与燃气轮机4输出口相连通，余热锅炉5高压蒸汽输出口与主蒸汽轮机10输入口相连通，主蒸汽轮机10转轴与主蒸汽轮机发电机13转轴相连接，凝结水泵7输出口与主凝结水系统11给水入口相连通，主蒸汽轮机10输出口和主凝结水系统11蒸汽输入口相连通，主凝结水系统11输出口与余热锅炉5给水入口相连通。The flow chart of a 250MW integrated coal gasification combined cycle power generation system based on the device of the utility model is shown in Fig. 2 . In addition to the equipment included in the driving device of the air separation system compression equipment, it also includes a main steam turbine 10 , a main condensate water system 11 , a gas turbine generator 12 and a main steam turbine generator 13 . The product output port of the rectification system 9 is connected to the gas input port of the gasifier 3, the product output port of the gasifier 3 is connected to the fuel input port of the gas turbine 4, and the gas turbine 4 shaft is connected to the gas turbine generator 12 shaft; the waste heat boiler 5 fuel input The port is connected with the output port of the gas turbine 4, the high-pressure steam output port of the waste heat boiler 5 is connected with the input port of the main steam turbine 10, the rotating shaft of the main steam turbine 10 is connected with the rotating shaft of the main steam turbine generator 13, and the output port of the condensate pump 7 is connected with the main condensing The feedwater inlet of the water system 11 is connected, the output port of the main steam turbine 10 is connected with the steam input port of the main condensate system 11 , and the output port of the main condensate system 11 is connected with the feedwater inlet of the waste heat boiler 5 .
优选地，空分系统中的2个大型压缩设备由小型汽轮机同轴带动，小型汽轮机功率为40MW。Preferably, the two large compression devices in the air separation system are coaxially driven by a small steam turbine with a power of 40MW.
当应用本实用新型装置的整体煤气化联合循环发电系统处于满负荷运行工况时，空分系统1用于为气化炉提供氧气和氮气产品，借助这些气体产品，气化炉3将煤粉颗粒转化为可燃烧气体(有效成分为CO和H2)，并送入燃气轮机4燃烧。燃料气体在燃气轮机4燃烧室燃烧后以约1140℃的温度进入燃气轮机4的透平做功带动燃气轮机发电机12发电，燃气轮机4排气进入余热锅炉5并将余热锅炉5中的工质水加热成过热蒸汽。从余热锅炉5出来的中压过热蒸汽(温度为522℃，压力为4.12MPa)进入小型汽轮机2膨胀做功(功率为40MW)，从而带动空分系统1的压缩设备8运转；高压过热蒸汽(温度为522℃，压力为9.359MPa)进入主蒸汽轮机10膨胀做功，从而带动主蒸汽轮机发电机13转动发电。在小型汽轮机2和主蒸汽轮机10做完功的乏汽分别进入小型汽轮机凝汽器6和主凝结水系统11，经小型汽轮机凝汽器6冷凝换热后的水通过凝结水泵7与主凝结水系统11冷凝后的水汇集，一起进入余热锅炉5完成工质循环。When the integrated coal gasification combined cycle power generation system applying the device of the utility model is in full load operating condition, the air separation system 1 is used to provide oxygen and nitrogen products for the gasifier, and by means of these gas products, the gasifier 3 converts the coal powder The particles are converted into combustible gas (effective components are CO and H 2 ), and sent to the gas turbine 4 for combustion. After the fuel gas is burned in the combustion chamber of the gas turbine 4, it enters the turbine of the gas turbine 4 at a temperature of about 1140°C to do work to drive the gas turbine generator 12 to generate electricity. steam. The medium pressure superheated steam (temperature is 522 ℃, pressure is 4.12MPa) that comes out from the waste heat boiler 5 enters the small steam turbine 2 to expand and do work (power is 40MW), thereby driving the operation of the compression equipment 8 of the air separation system 1; the high pressure superheated steam (temperature 522°C, pressure 9.359MPa) into the main steam turbine 10 to expand and do work, thereby driving the main steam turbine generator 13 to rotate and generate electricity. The exhausted steam that has done work in the small steam turbine 2 and the main steam turbine 10 enters the small steam turbine condenser 6 and the main condensate water system 11 respectively, and the water condensed and heat-exchanged by the small steam turbine condenser 6 passes through the condensate water pump 7 and the main condensate water system. The condensed water in the water system 11 is collected and enters the waste heat boiler 5 together to complete the working fluid cycle.
当应用本实用新型装置的整体煤气化联合循环发电系统处于冷态启动工况时，将改变原有的启动方式——空分系统1最先启动，而将启动先后顺序变成燃气轮机4、余热锅炉5、主蒸汽轮机10、小型汽轮机2、空分系统1和气化炉3。由于空分系统1要先于气化炉3启动，气化炉3无法为空分系统1提供燃料，因此由天然气代替气化炉3输出的燃料气体进入燃气轮机4燃烧为空分系统1的启动提供能量。为保证燃气轮机4有较高的做功效率，保持燃气轮机4工作在80％负荷工况下。天然气在燃气轮机4燃烧室燃烧后进入燃气轮机4的透平带动燃气轮机发电机12做功，做完功的乏气进入余热锅炉5带动余热锅炉启动。余热锅炉5产生过热蒸汽后带动主蒸汽轮机10和小型汽轮机2启动，从而带动空分系统1的压缩设备8启动。在空分系统1启动完毕后，气化炉3启动，在达到可以为燃气轮机4提供燃料的条件后，所述系统转入运行工况。When the integrated coal gasification combined cycle power generation system using the device of the utility model is in the cold start-up condition, the original start-up mode will be changed—the air separation system 1 starts first, and the start-up sequence will be changed to gas turbine 4, waste heat Boiler 5, main steam turbine 10, small steam turbine 2, air separation system 1 and gasifier 3. Since the air separation system 1 starts before the gasification furnace 3, the gasification furnace 3 cannot provide fuel for the air separation system 1, so natural gas replaces the fuel gas output by the gasification furnace 3 and enters the gas turbine 4 for combustion to start the air separation system 1 provide energy. In order to ensure that the gas turbine 4 has a higher working efficiency, the gas turbine 4 is kept working at 80% load condition. After the natural gas is burned in the combustion chamber of the gas turbine 4, it enters the turbine of the gas turbine 4 to drive the gas turbine generator 12 to perform work, and the exhausted gas that has completed the work enters the waste heat boiler 5 to drive the waste heat boiler to start. After the waste heat boiler 5 generates superheated steam, it drives the main steam turbine 10 and the small steam turbine 2 to start, thereby driving the compression equipment 8 of the air separation system 1 to start. After the start-up of the air separation system 1 is completed, the gasifier 3 is started, and after the condition that fuel can be provided for the gas turbine 4 is reached, the system turns into an operating condition.
本实用新型通过充分利用整体煤气化联合循环发电系统现有设备及其连接方式并相应调整启动方式来优化空分系统压缩设备驱动问题，提高了空分系统的能源利用效率及其负荷跟随性能，达到了降低空分系统能耗，提升电站经济性的目的。对于250MW的整体煤气化联合循环发电系统，如采用电动机来驱动空分系统压缩设备，应配备总额定功率为42MW的电动机及容量相匹配的启动变压器、启动锅炉等设备，而应用本实用新型装置则只需配备40MW的小型汽轮机及容量相匹配的凝汽器和凝结水泵，可节省约1000万元的初期投资；应用本实用新型装置一段时间后，供电效率平均提升了1.5％；由于小型汽轮机一直运行在良好的状况下，还节省了可观的运行维护费用。The utility model optimizes the driving problem of the compression equipment of the air separation system by making full use of the existing equipment and its connection mode of the integrated coal gasification combined cycle power generation system and correspondingly adjusts the starting mode, thereby improving the energy utilization efficiency of the air separation system and its load following performance. The purpose of reducing the energy consumption of the air separation system and improving the economy of the power station is achieved. For a 250MW integrated coal gasification combined cycle power generation system, if a motor is used to drive the air separation system compression equipment, it should be equipped with a motor with a total rated power of 42MW and a starting transformer and a starting boiler with a matching capacity, and the device of the utility model should be used Then it only needs to be equipped with a 40MW small steam turbine and a condenser with a matching capacity and a condensate pump, which can save an initial investment of about 10 million yuan; It has been running in good condition, and it also saves considerable operation and maintenance costs.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104358595A (en) * | 2014-11-05 | 2015-02-18 | 中国华能集团清洁能源技术研究院有限公司 | Device for driving compression device of space division system and driving method of device |
| CN112944805A (en) * | 2021-02-04 | 2021-06-11 | 华能（天津）煤气化发电有限公司 | Method for automatically changing load of air separation of Integrated Gasification Combined Cycle (IGCC) unit |
| CN113931745A (en) * | 2021-09-18 | 2022-01-14 | 华电电力科学研究院有限公司 | Waste heat boiler system of gas-steam combined cycle unit and starting method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104358595A (en) * | 2014-11-05 | 2015-02-18 | 中国华能集团清洁能源技术研究院有限公司 | Device for driving compression device of space division system and driving method of device |
| CN112944805A (en) * | 2021-02-04 | 2021-06-11 | 华能（天津）煤气化发电有限公司 | Method for automatically changing load of air separation of Integrated Gasification Combined Cycle (IGCC) unit |
| CN113931745A (en) * | 2021-09-18 | 2022-01-14 | 华电电力科学研究院有限公司 | Waste heat boiler system of gas-steam combined cycle unit and starting method thereof |
| CN113931745B (en) * | 2021-09-18 | 2023-06-16 | 华电电力科学研究院有限公司 | Waste heat boiler system of gas-steam combined cycle unit and starting method thereof |
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