KR970002012B1 - Complex generating system for carbonic gas - Google Patents
Complex generating system for carbonic gas Download PDFInfo
- Publication number
- KR970002012B1 KR970002012B1 KR1019930021112A KR930021112A KR970002012B1 KR 970002012 B1 KR970002012 B1 KR 970002012B1 KR 1019930021112 A KR1019930021112 A KR 1019930021112A KR 930021112 A KR930021112 A KR 930021112A KR 970002012 B1 KR970002012 B1 KR 970002012B1
- Authority
- KR
- South Korea
- Prior art keywords
- gas
- pressure steam
- turbine
- coal
- waste heat
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1823—Rotary generators structurally associated with turbines or similar engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1861—Waste heat boilers with supplementary firing
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
제1도는 종래의 석탄가스화 복합발전시스템의 개략적인 블록도.1 is a schematic block diagram of a conventional coal gasification combined cycle system.
제2도는 본 발명의 바람직한 실시예를 나타낸 석탄가스화 복합발전 시스템의 구성도.2 is a block diagram of a coal gasification combined cycle system showing a preferred embodiment of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 공기 분리장치 2 : 가스화기1: air separator 2: gasifier
3 : 냉각기 5 : 연소기3: cooler 5: burner
7 : 가스터빈 9 : 폐열회수보일런7: gas turbine 9: waste heat recovery boiler
10 : 증기터빈 19 : 가스정제장치10: steam turbine 19: gas purification device
20 : 가스처리장치 21 : 고압드럼20 gas processing apparatus 21 high pressure drum
22 : 중압드럼 23 : 저압드럼22: medium pressure drum 23: low pressure drum
27 : 고압증기터빈 28 : 중압증기터빈27: high pressure steam turbine 28: medium pressure steam turbine
29 : 저압증기터빈29: low pressure steam turbine
본 발명은 석탄가스화 복합발전 시스템에 관한 것으로, 특히 폐열회수보일러에서 발생한 증기를 가스터빈용 연소기내에 분사하여 석탄가스를 연소시킴으로써 동력을 극대화할 수 있는 석탄 가스화 복합발전시스템에 관한 것이다.The present invention relates to a coal gasification combined cycle power generation system, and more particularly, to a coal gasification combined cycle power generation system capable of maximizing power by injecting steam generated by the waste heat recovery boiler into a combustor for gas turbines to combust coal gas.
종래의 일반적인 석탄가스화 복합발전시스템은 석탄 가스화기와 가스정화장치와 가스터빈사이클 및 증기터빈사이클로 구성된다. 일반적으로 석탄가스화기에서는 산소와 증기 등을 유입하여 미분탄과 반응시켜 석탄가스를 생성하게 되고, 이 생성된 석탄가스는 가스정화장치를 거치면서 고형입자와 황성분등이 제거되어 공기압축기와 연소기 및 가스터빈으로 이루어진 가스터빈 사이클의 연소기로 유입된다. 연소기에서 연소된 연소가스는 가스터빈에서 팽창되어 가스터빈을 작동시켜 발전기에 의해 전력을 발생시키고, 가스터빈에서 배출된 배기가스는 폐열회수보일러로 유입된다. 폐열회수보일러에서는 배기가스에 의해 증기를 발생시켜 이를 증기터빈에 보내어 팽창시킴으로써 증기터빈을 작동시켜 발전기에 의해 전력을 발생시킨다. 이러한 석탄가스화 복합발전시스템은 가스터빈에 배출된 배기가스를 활용하여 폐열회수보일러에서 증기를 생성하고 증기터빈을 작동시켜 부가적인 동력을 얻을 수 있다는 점에서 유용하게 사용되고 있다.The conventional coal gasification combined cycle power generation system is composed of a coal gasifier, a gas purifier, a gas turbine cycle and a steam turbine cycle. In general, coal gasifiers induce oxygen and steam to react with pulverized coal to produce coal gas. The generated coal gas is removed through the gas purifier to remove solid particles and sulfur components. It enters the combustor of a gas turbine cycle consisting of a turbine. The combustion gas combusted in the combustor is expanded in the gas turbine to operate the gas turbine to generate power by the generator, and the exhaust gas discharged from the gas turbine flows into the waste heat recovery boiler. In the waste heat recovery boiler, steam is generated by the exhaust gas and sent to the steam turbine to expand and operate the steam turbine to generate power by the generator. The coal gasification combined cycle power generation system is usefully used in that steam can be generated from the waste heat recovery boiler by using exhaust gas discharged from the gas turbine and additional power can be obtained by operating a steam turbine.
따라서 위와 같은 석탄가스화 복합발전시스템의 유용성으로 인해 지금까지 다양한 종류의 것이 개발되어 왔다. 예를 들면 한국특허공고 제89-425호에는 가스화로에서 생성된 가연성 가스를 연료로 하는 가스터빈사이클에 사용하는 공기압축기에 압축공기를 일부 추출하여 이 추출공기를 산소와 질소분리를 위한 원료공기로서 도입하는 구성의 석탄가스화장치가 소개되고 있다.Therefore, various kinds of things have been developed so far due to the usefulness of the coal gasification combined cycle system. For example, Korean Patent Publication No. 89-425 discloses a part of compressed air in an air compressor used for a gas turbine cycle using a combustible gas generated in a gasifier as a fuel, and extracts the extracted air from raw air for separating oxygen and nitrogen. Coal gasifiers are introduced.
미국특허 제4,282,708호에는 가스터빈과 증기터빈을 구비한 복합발전설비의 재기동시간을 단축할 수 있는 방법이 제시되어 있다.U.S. Patent No. 4,282,708 discloses a method for reducing the restart time of a combined cycle power plant equipped with a gas turbine and a steam turbine.
미국특허 제4,466,241호에는 복합발전설비에 있어서 연소가스의 NOX농도를 감소시킬 수 있는 폐열회수보일러를 개시하고 있다. 또한 일본공개 특허공보 제89-155007호에는 증기 ·가스 복합사이클 발전설비의 기동시에 NOX배출량을 감소시킬 수 있는 폐열회수보일러의 운전방법에 대해 설명되어 있다. 일본공개 특허공고 제92-l16232호에는 NOX의 발생을 줄임과 동시에 생성가스의 연소후에 CO2의 분리조작을 간소화시킬 수 있는 석탄가스화 복합발전방법이 제시되고 있다.U.S. Patent No. 4,466,241 discloses a waste heat recovery boiler which can reduce the NO x concentration of combustion gas in a combined cycle power plant. In addition, Japanese Laid-Open Patent Publication No. 89-155007 discloses a method is described for the operation of the waste heat recovery boiler which can reduce NO X emissions at a starting time of the steam-gas combined-cycle power plant. Japanese Patent Application Publication No. 92-l16232 proposes a coal gasification combined cycle method that can reduce the generation of NO X and simplify the separation operation of CO 2 after combustion of the produced gas.
또한, 유럽공개 특허공보 제0,447,122호에는 분말탄을 연소시킴과 아울러 중기를 생성하는 가압유체 연소보일러를 구비한 복합발전설비를 제시하고 있다.In addition, European Patent Publication No. 0,447,122 discloses a combined cycle power plant equipped with a pressurized fluid combustion boiler that combusts powdered coal and generates heavy machinery.
그러나 최근의 동향에 따르면 복합발전시스템의 설계자들은 동력 및 효율의 극대화에 관심이 집중되고 있다. 상기에 언급된 선행기술의 복합발전시스템은 그 의도된 목적을 어느정도 달성할 수 있다 하더라도 폐열회수보일러에서 발생된 중기를 석탄가스와 연소에 전혀 활용하고 있지 않으므로 동력의 증대 및 효율성 측면에서 부족하다는 단점이 남아 있다.However, according to recent trends, designers of combined cycle systems are focusing on maximizing power and efficiency. Even if the above-mentioned combined power generation system of the prior art can achieve its intended purpose, it does not utilize the heavy gas generated from the waste heat recovery boiler for coal gas and combustion at all, so it is insufficient in terms of power increase and efficiency. This remains.
이상에서 설명한 종래의 일반적인 석탄가스화 복합발전 시스템의 일예는 제1도와 같이 도시될 수 있다. 제1도를 참조하여 종래의 석탄가스화 복합발전시스템을 설명하기로 한다. 종래의 일반적인 석탄가스화 복합발전시스템은 공기분리장치(1) 의해 분리된 산소를 유입하여 석탄과 반응시켜 석탄가스를 생성하는 가스화기(2)를 구비한다. 가스화기(2)에서 생성된 석탄가스는 냉각기(3)를 거쳐 가스정화장치(4)로 유입되어 고형입자와 황성분 등이 제거된 후에 연소기(5)로 진입하여 공기압축기(6)에서 공급된 압축공기와 함께 연소된다. 고온의 연소가스는 가스터빈(7)으로 들어가 팽창되면서 가스터빈(7)을 작동시켜 발전기(8)를 구동하여 전력을 발생시킨다.An example of a conventional coal gasification combined cycle power generation system described above may be illustrated as shown in FIG. 1. Referring to FIG. 1, a conventional coal gasification combined cycle system will be described. Conventional coal gasification combined cycle power generation system is provided with a gasifier (2) for injecting oxygen separated by the air separation device (1) to react with coal to generate coal gas. The coal gas generated in the gasifier 2 flows into the gas purifier 4 through the cooler 3 to remove solid particles and sulfur components, and then enters the combustor 5 and is supplied from the air compressor 6. Combustion with compressed air. The hot combustion gas enters the gas turbine 7 and expands to operate the gas turbine 7 to drive the generator 8 to generate power.
가스터빈(7)에서 배출된 배기가스는 폐열회수보일러(9)로 인도되어 증기를 발생시키며 발생된 증기에 의해 증기터빈(10)을 작동시켜 발전기(11)를 구동하여 전력을 발생시킨다. 폐열회수보일러(9)로 유입된 연소가스는 굴뚝(12)으로 배출되며 증기터빈(10)에서 배출된 증기는 응축기(13)로 유입 응축되어 펌프(14)에 의해 폐열회수보일러(9)로 재순환되어 증기발생원으로 사용된다. 한편 공기 압축기(6)에 의해 압축된 공기의 일부는 공기분리장치(1)로 보내져 질소와 산소로 분리되며 분리된 질소의 일부는 석탄을 가스화기(2)로 이송하는데 사용되고 나머지 질소는 연소기(5)로 유입된다.The exhaust gas discharged from the gas turbine 7 is led to the waste heat recovery boiler 9 to generate steam, and operates the steam turbine 10 by the generated steam to drive the generator 11 to generate power. Combustion gas introduced into the waste heat recovery boiler (9) is discharged to the chimney (12) and the steam discharged from the steam turbine 10 is condensed into the condenser (13) to the waste heat recovery boiler (9) by the pump (14) It is recycled and used as a steam generator. Meanwhile, a part of the air compressed by the air compressor 6 is sent to the air separator 1 to be separated into nitrogen and oxygen, and a part of the separated nitrogen is used to transfer coal to the gasifier 2 and the remaining nitrogen is combustor ( 5) flows into.
그러나 제1도에 도시된 바와 같은 석탄가스화 복합 발전시스템은 가스터빈의 일량이 오직 연소기(5)내에 유입된 석탄가스와 압축공기의 작동유체의 유량에만 한정되어 있으므로 가스터빈(7)에 의한 동력증대를 개선할 수 없는 단점을 안고 있다.However, in the coal gasification combined cycle power generation system as shown in FIG. 1, since the work of the gas turbine is limited only to the flow rates of the working gas of the coal gas and the compressed air introduced into the combustor 5, the power generated by the gas turbine 7 is reduced. There is a disadvantage that cannot improve augmentation.
따라서 본 발명의 석탄가스화 복합발전시스템은 종래 기술의 문제점을 해소하기 위해서 발명된 것이다.Therefore, the coal gasification combined cycle system of the present invention was invented to solve the problems of the prior art.
본 발명의 목적은 폐열회수보일러에서 생성된 중압증기의 일부를 가스터빈사이클의 연소기내에 유입시켜 압축공기 및 석탄가스와 함께 연소시킴으로써 가스터빈의 동력생산을 증대시킬 수 있는 석탄가스화 복합발전시스템을 제공하는데 있다.It is an object of the present invention to provide a coal gasification combined cycle power generation system that can increase the power production of the gas turbine by introducing a portion of the medium pressure steam generated in the waste heat recovery boiler into the combustor of the gas turbine cycle and combusted with compressed air and coal gas. It is.
본 발명의 상기 목적은 석탄을 산소 및 중압증기와 반응시켜 석탄가스를 생성하는 가스화기와, 생성된 석탄가스를 연소기를 통해 연소시켜 이 연소가스에 의해 동력을 발생시키는 가스터빈과, 상기 가스터빈에서 배출된 배기가스에 의해 고압증기와 중압증기 및 저압증기를 발생시키는 폐열회수보일러와, 상기 발생된 고압증기와 중압증기 및 저압증기에 의해 각기 작동되어 동력을 발생시키는 고압증기터빈과 중압증기터빈 및 저압증기터빈으로 이루어진 증기터빈을 포함하고, 상기 폐열회수보일러의 중압증기의 일부를 상기 연소기내에 분사시켜 석탄가스와 함께 연소시키는 석탄가스화 복합발전시스템을 제공함으로써 달성될 수 있다.The object of the present invention is a gasifier for generating coal gas by reacting coal with oxygen and medium pressure steam, and a gas turbine for generating power by the combustion gas by burning the produced coal gas through a combustor, and in the gas turbine Waste heat recovery boiler for generating high pressure steam, medium pressure steam and low pressure steam by the discharged exhaust gas, high pressure steam turbine and medium pressure steam turbine which are operated by the generated high pressure steam, medium pressure steam and low pressure steam to generate power, It can be achieved by providing a coal gasification combined cycle system comprising a steam turbine consisting of a low-pressure steam turbine, injecting a portion of the medium-pressure steam of the waste heat recovery boiler into the combustor to burn together with coal gas.
본 발명의 석탄가스화 복합발전시스템의 실시예를 제2도를 통하여 설명하면 다음과 같다.An embodiment of the coal gasification combined cycle power generation system of the present invention will be described with reference to FIG. 2.
제2도에서 제1도에 도시된 부분과 동일한 부분은 동일부호를 사용하여 설명하기로 한다. 본 발명의 석탄 가스화 복합발전시스템은 공기 분리장치(1)에서 분리되어 유입된 산소와 폐열회수보일러(9)에서 유입된 중압포화증기에 의해 석탄을 반응시켜 석탄가스를 생성하는 가스화기(2)를 구비한다. 공기분리장치(1)는 대기의 공기를 압축하는 공기압축기(6)로부터 압축된 공기의 일부를 공급받아 산소와 질소의 액화 온도차이를 이용하여 산소와 질소를 분리하며 산소는 압축기(15)에 의해 가스화기(2)내로 유입되어 석탄가스화반응시에 산화제로 작용하며 질소의 일부는 압축기(16)를 통해 석탄건조기(17)내의 석탄을 가스화기(2)로 이송시키는데 사용되며 질소의 나머지는 압축기(18)에 의해 연소기(5)로 유입되어 NOX생성량을 감소시키는데 사용된다.In FIG. 2, the same parts as those shown in FIG. 1 will be described with the same reference numerals. In the coal gasification combined cycle power generation system of the present invention, a gasifier (2) for generating coal gas by reacting coal with oxygen introduced and separated from the air separator (1) and medium pressure saturated steam introduced from the waste heat recovery boiler (9). It is provided. The air separator 1 receives a part of the compressed air from the air compressor 6 which compresses the air of the atmosphere, and separates oxygen and nitrogen by using a difference in the liquefaction temperature of oxygen and nitrogen, and oxygen is supplied to the compressor 15. It is introduced into the gasifier 2 and acts as an oxidizing agent in the coal gasification reaction, and a part of nitrogen is used to transfer coal in the coal dryer 17 to the gasifier 2 through the compressor 16, and the rest of nitrogen It enters the combustor 5 by the compressor 18 and is used to reduce the NO x production amount.
가스화기(2)에 가스화반응을 일으켜 석탄가스가 생성되고 재는 가스화기(2)의 하단부로 배출되어 처리된다. 생성된 석탄가스는 냉각기(3)로 유입되어 이후에 상세히 설명하는 바와 같은 열교환과정을 통해 가스정제에 용이하도록 적합한 온도로 낮추어진다. 냉각기(3)를 나온 석탄가스는 가스정제장치(19)로 진입하여 그것에 함유된 미반응 입자(고형입자)가 제거되고 그후에 가스처리장치(20)를 거쳐 황성분이 제거되어 정제된 석탄가스가 연소기(5)로 유입된다. 연소기(5)에는 석탄가스 이외에도 공기압축기(6)에 의해 압축공기가 공급되고 연소가스중에 NOX생성량을 감소시키기 위해 공기분리장치(1)로부터 질소가 공급된다. 또한 이후에 상세히 설명하는 바와 같이 가스터빈(7)의 동력증대를 위해 폐열회수보일러(9)에서 생성된 중압증기의 일부가 연소기(5)내에 유입된다. 따라서 연소기(5)에 유입된 정제된 석탄가스와 압축공기와 중압증기 및 질소가 혼합연소되어 가스터빈(7)으로 들어가 팽창됨으로써 가스터빈(7)을 작동시켜 발전기(8)를 구동하여 전력을 발생시키게 된다.The gasification reaction occurs in the gasifier 2 to produce coal gas, and the ash is discharged to the lower end of the gasifier 2 and processed. The generated coal gas is introduced into the cooler 3 and lowered to a temperature suitable for gas purification through a heat exchange process as described in detail later. The coal gas exiting the cooler 3 enters the gas purifier 19 to remove unreacted particles (solid particles) contained therein, and then removes sulfur components through the gas treatment apparatus 20 to purify coal gas. Flows into (5). Combustor 5 is supplied with compressed air by air compressor 6 in addition to coal gas, and nitrogen is supplied from air separator 1 to reduce the amount of NO X produced in the combustion gas. In addition, as will be described in detail later, a part of the medium pressure steam generated in the waste heat recovery boiler 9 is introduced into the combustor 5 to increase the power of the gas turbine 7. Accordingly, the purified coal gas, compressed air, medium pressure steam, and nitrogen introduced into the combustor 5 are mixed and burned to enter the gas turbine 7 to expand, thereby operating the gas turbine 7 to drive the generator 8 to generate power. Will be generated.
본 발명은 실시예에서와 같이 폐열회수보일러(9)에서 생성된 중앙증기의 일부를 연소기(5)내에 유입하여 석탄가스를 연소시키기 때문에 가스터빈(7)의 동력(일)이 증가되어 더 많은 전력을 얻을 수 있게 된다.In the present invention, since a part of the central steam generated in the waste heat recovery boiler 9 is introduced into the combustor 5 to combust coal gas as in the embodiment, the power (work) of the gas turbine 7 is increased, thereby increasing more. You get power.
가스터빈(7)에서 배출된 배기가스는 폐열회수보일러(9)로 유입되어 열교환과정을 거쳐 증기터빈(10)의 작동에 필요한 증기를 생성하며 굴뚝(12)을 통해 대기로 배출된다. 폐열회수보일러(9)에서 생성된 증기는 그 온도에 따라 저압증기와 중압증기 및 고압증기로 나눌 수 있다. 폐열회수보일러(9)는 고압드럼(21)과 중압드럼(22) 및 저압드럼(23)을 구비한다. 또한 폐열회수보일러(9)에는 고압 증기를 발생시키는 고압증기과열기(24)와 중압증기를 발생시키는 중압증기 재열기(25) 및 저압증기를 발생시키는 저압증기 과열기(26)가 설치되어 있다.The exhaust gas discharged from the gas turbine 7 flows into the waste heat recovery boiler 9 to generate steam necessary for the operation of the steam turbine 10 through a heat exchange process and is discharged to the atmosphere through the chimney 12. Steam generated in the waste heat recovery boiler 9 can be divided into low pressure steam, medium pressure steam and high pressure steam according to the temperature. The waste heat recovery boiler 9 includes a high pressure drum 21, a medium pressure drum 22, and a low pressure drum 23. The waste heat recovery boiler 9 is provided with a high pressure steam superheater 24 for generating high pressure steam, a medium pressure steam reheater 25 for generating medium pressure steam, and a low pressure steam superheater 26 for generating low pressure steam.
본 발명의 석탄가스화 복합발전시스템에서 증기 터빈(10)은 고압증기터빈(27)과 중압증기터빈(28) 및 저압증기터빈(29)으로 구성되어 있다.In the coal gasification combined cycle power generation system of the present invention, the steam turbine 10 includes a high pressure steam turbine 27, a medium pressure steam turbine 28, and a low pressure steam turbine 29.
저압증기터빈(29)에서 배출된 증기의 일부는 응축기(30)로 들어가 상변화를 거쳐 물로 전환된 후 응축기펌프(31)에 의해 냉각기(3)로 공급되어 냉각기(3)에서 석탄가스와 열교환 과정을 통해 증기 상태로 되어 고압증기과열기(24)로 진입한다. 또한 저압증기터빈(29)에서 배출된 나머지 증기는 탈기기(32)로 유입되어 물로 응축되는 과정에서 생성되는 공기가 제거된 후에 응축된 물이 펌프(33)에 의해 폐열회수보일러(9)의 고압드럼(21)과 중앙드럼(22) 및 저압드럼(23)으로 재순환된다.Part of the steam discharged from the low pressure steam turbine 29 enters the condenser 30, is converted into water through phase change, and then supplied to the cooler 3 by the condenser pump 31 to exchange heat with coal gas in the cooler 3. The process enters the steam state and enters the high pressure steam superheater (24). In addition, the remaining steam discharged from the low-pressure steam turbine 29 is introduced into the degasser 32, the air generated in the process of condensing into water is removed after the condensed water of the waste heat recovery boiler (9) by the pump 33 The high pressure drum 21, the central drum 22, and the low pressure drum 23 are recycled.
고압증기터빈(27)을 작동시키는 고압증기는 응축기(30)로부터의 물이 냉각기(3)에서의 열교환을 거쳐 생성된 증기가 폐열회수보일러(9)의 고압드럼(21)에서 나온 증기와 합류된 다음 고압 증기 과열기(24)로 진입하여 열교환을 통해 생성된다. 이 고압증기는 고압증기터빈(27)에 유입 팽창되어 고압증기터빈(27)을 작동시켜 발전기(11)를 구동하여 전력을 얻게 한다.The high-pressure steam that operates the high-pressure steam turbine 27 merges steam generated from the high-pressure drum 21 of the waste heat recovery boiler 9 with the steam generated by the water from the condenser 30 through heat exchange in the cooler 3. Then enters the high pressure steam superheater 24 and is produced through heat exchange. The high pressure steam is introduced into and expanded in the high pressure steam turbine 27 to operate the high pressure steam turbine 27 to drive the generator 11 to obtain power.
중압증기터빈(28)용 중압증기는 고압증기터빈(27)에서 배출된 증기가 폐열회수보일러(9)의 중앙증기재열기(25)로 유입되어 재열됨으로써 생성된다. 이 중압증기는 중압증기터빈(28)으로 들어가 팽창되어 중압증기터빈(28)을 작동시켜 발전기(11)를 구동하게 된다.The medium pressure steam for the medium pressure steam turbine 28 is generated by the steam discharged from the high pressure steam turbine 27 flowing into the central steam reheater 25 of the waste heat recovery boiler 9 and reheated. The medium-pressure steam enters the medium-pressure steam turbine 28 and expands to operate the medium-pressure steam turbine 28 to drive the generator 11.
저압증기터빈(29)용 저압증기는 저압드럼(23)에서 나온 증기가 폐열회수보일러(9)의 저압증기 과열기(26)를 거치면서 생성되며 생성된 저압증기는 중앙증기터빈(28)에서 배출된 증기와 합류하여 저압증기터빈(29)으로 들어가 팽창됨으로써 전압증기터빈(29)을 작동시켜 발전기(11)를 구동하여 동력을 발생시킨다.Low pressure steam for the low pressure steam turbine (29) is produced by the steam from the low pressure drum (23) is passed through the low pressure steam superheater (26) of the waste heat recovery boiler (9) and the generated low pressure steam is discharged from the central steam turbine (28) By joining the steam and entering the low-pressure steam turbine 29 is expanded to operate the voltage steam turbine 29 to drive the generator 11 to generate power.
한편 폐열회수보일러(9)의 중압드럼(22)에서 나온 중압증기의 일부는 라인(34)을 통해 석탄건조기(17)로 유입되어 석탄의 건조에 사용되며 나머지 중압증기는 폐열회수보일러(9)로 재순환되어 재열된 후에 라인(35)을 통해 가스화기(1)내로 유입되어 석탄가스화 반응에 이용된다. 또한 위에서 설명한 바와 같은 폐열회수보일러(9)에서 재열된 중압증기의 일부는 라인(36)을 통해 연소기(5)로 진입하여 석탄가스 및 압축공기와 혼합되어 연소된다.Meanwhile, a part of the medium pressure steam from the medium pressure drum (22) of the waste heat recovery boiler (9) is introduced into the coal dryer (17) through the line 34 and used for drying the coal, and the remaining medium pressure steam is the waste heat recovery boiler (9). After being recycled to and reheated, it is introduced into the gasifier 1 through the line 35 and used for the coal gasification reaction. In addition, a part of the medium pressure steam reheated in the waste heat recovery boiler 9 as described above enters the combustor 5 through the line 36 and is mixed with coal gas and compressed air and combusted.
따라서 본 발명의 석탄가스화 복합발전시스템에서 폐열회수보일러의 중압증기가 연소기(5)에 분사됨으로써 가스터빈의 동력(일)이 증대될 뿐만 아니라 전체의 복합발전시스템의 효율도 상당히 상승하게 된다.Therefore, in the coal gasification combined cycle power generation system of the present invention, the medium pressure steam of the waste heat recovery boiler is injected into the combustor 5 to increase the power (work) of the gas turbine as well as to significantly increase the efficiency of the overall combined cycle power generation system.
특히 폐열회수보일러(9)의 중압증기가 연소기(5)에 유입되는 유량의 조절은 라인(35),(36)의 분기지역에 밸브(도시않됨)를 설치함으로써 용이하게 달성될 수 있다. 또한 상기 실시예는 폐열회수보일러(9)의 중압증기가 연소기(5)에 직접 분사되어 석탄가스와 혼합되는 것으로 설명되었으나 이와는 달리 라인(36)을 석탄가스가 연소기(5)에 유입되기 전에 폐열회수보일러(9)의 중압증기와 합류되게 설치할 수도 있다. 이렇게 하면 석탄가스가 연소기(5)에 유입되기 전에 폐열회수보일러(9)의 중압증기에 의해 예열되어 연소기(5)에 유입되므로 석탄가스를 예열시키기 위한 부가적인 예열기구가 필요없게 되고 또한 연소기의 석탄가스 소모율을 줄일 수 있는 잇점이 있게 된다.In particular, the adjustment of the flow rate at which the heavy-pressure steam of the waste heat recovery boiler 9 flows into the combustor 5 can be easily achieved by installing a valve (not shown) in the branched areas of the lines 35 and 36. In addition, the above embodiment has been described that the medium pressure steam of the waste heat recovery boiler 9 is directly injected into the combustor 5 and mixed with coal gas, but unlike this, the waste heat before the coal gas enters the combustor 5 is line 36. It may be installed to join the heavy pressure steam of the recovery boiler (9). This preheats by the medium pressure steam of the waste heat recovery boiler 9 and flows into the combustor 5 before the coal gas enters the combustor 5, thus eliminating the need for an additional preheating mechanism for preheating the coal gas. There is an advantage to reduce the coal gas consumption rate.
본 발명의 석탄가스화 복합발전 시스템의 구성에 의하여, 폐열회수보일러의 중압증기(460psi, 617℉)의 91%를 뽑아 연소기내에 분사시켜 시뮬레이션(simulation)한 결과 가스터빈의 동력이 192.3MW로 종래의 173.8MW에 비해 약 10.6% 정도 증가되었고 전체 복합발전 시스템의 효율도 약 43.4% 정도 향상되었음을 확인하였다.According to the configuration of the coal gasification combined cycle power generation system of the present invention, 91% of the medium pressure steam (460psi, 617 ° F) of the waste heat recovery boiler was extracted and injected into the combustor. As a result, the power of the gas turbine was 192.3MW. Compared to 173.8MW, it was increased by about 10.6% and the efficiency of the entire combined cycle system was also improved by about 43.4%.
이상에서와 같은 본 발명의 석탄가스화 복합발전시스템은 폐열회수보일러에서 발생된 중압증기를 연소기내에 분사시켜 석탄가스를 연소시킴으로써 복합발전시스템의 출력을 상당히 증대시킬 수 있다.The coal gasification combined cycle power generation system of the present invention as described above can significantly increase the output of the combined cycle power generation system by injecting the medium pressure steam generated in the waste heat recovery boiler into the combustor to burn coal gas.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930021112A KR970002012B1 (en) | 1993-10-12 | 1993-10-12 | Complex generating system for carbonic gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019930021112A KR970002012B1 (en) | 1993-10-12 | 1993-10-12 | Complex generating system for carbonic gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR950012988A KR950012988A (en) | 1995-05-17 |
| KR970002012B1 true KR970002012B1 (en) | 1997-02-20 |
Family
ID=19365681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019930021112A KR970002012B1 (en) | 1993-10-12 | 1993-10-12 | Complex generating system for carbonic gas |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR970002012B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100735072B1 (en) * | 2005-02-22 | 2007-07-06 | 가부시끼가이샤 도시바 | Electric power-generating and desalination combined plant and operation method of the same |
| KR101402221B1 (en) * | 2012-12-13 | 2014-06-03 | 포스코에너지 주식회사 | Lng combined cycle power plant and power generating method utilizing a small-medium scale gasification system for improving generating efficiency |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100985972B1 (en) * | 2008-03-31 | 2010-10-06 | 엘지전자 주식회사 | Controlling method of robot cleaner |
| KR102188797B1 (en) * | 2018-04-02 | 2020-12-08 | 에브리봇 주식회사 | Robot cleaner and method for controling the same |
-
1993
- 1993-10-12 KR KR1019930021112A patent/KR970002012B1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100735072B1 (en) * | 2005-02-22 | 2007-07-06 | 가부시끼가이샤 도시바 | Electric power-generating and desalination combined plant and operation method of the same |
| KR101402221B1 (en) * | 2012-12-13 | 2014-06-03 | 포스코에너지 주식회사 | Lng combined cycle power plant and power generating method utilizing a small-medium scale gasification system for improving generating efficiency |
Also Published As
| Publication number | Publication date |
|---|---|
| KR950012988A (en) | 1995-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8715379B2 (en) | Advanced ASU and HRSG integration for improved integrated gasification combined cycle efficiency | |
| US7191587B2 (en) | Hybrid oxygen-fired power generation system | |
| US20040011057A1 (en) | Ultra-low emission power plant | |
| CN1162643C (en) | Combined circular coal-burning power generating system and method adopting partial gasification and air preheating | |
| CA2726238C (en) | Method and apparatus for generating electrical power | |
| JP3462222B2 (en) | Syngas expander located just upstream of the gas turbine | |
| US7513118B2 (en) | Method for operating a gas turbine and a gas turbine for implementing the method | |
| CA2618030C (en) | A method for operating a gas turbine and a gas turbine for implementing the method | |
| US6314715B1 (en) | Modified fuel gas turbo-expander for oxygen blown gasifiers and related method | |
| KR970002012B1 (en) | Complex generating system for carbonic gas | |
| KR950011694B1 (en) | Complex power generating system | |
| Lozza et al. | Combined-cycle power stations using “Clean-coal technologies”: Thermodynamic analysis of full gasification versus fluidized bed combustion with partial gasification | |
| RU2250872C1 (en) | Combined method of electric power and a liquid synthetic fuel production by gas turbine and steam-gas installations | |
| JPH09317407A (en) | Heavy oil firing compound power generation facility | |
| JP2003518220A (en) | Operation method of steam turbine equipment and steam turbine equipment operated by this method | |
| RU2428459C1 (en) | Plant for combined production of hydrogen-containing gas, and electric and heat energy | |
| US4346317A (en) | Gasified coal-fired system | |
| WO2009034285A2 (en) | Improved power plant | |
| KR970002011B1 (en) | Complex generating system for carbonic gas with vapor generating gas apparatus | |
| KR970063877A (en) | High Reliability High Efficiency Coal Gasification Combined Power Generation System and Power Generation Method | |
| SU1584757A3 (en) | Method of producing electric power from carbonaceous fuel | |
| Long III et al. | Development and Analysis of an Integrated Mild-Partial Gasification Combined (IMPGC) Cycle: Part 2—Comparison With Other Power Generation Systems | |
| JP3652743B2 (en) | Gasification combined power plant | |
| JP3074448B2 (en) | Combined power generation system | |
| KR100215921B1 (en) | Integrated gasification combined cycle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| G160 | Decision to publish patent application | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant | ||
| FPAY | Annual fee payment |
Payment date: 20030813 Year of fee payment: 7 |
|
| LAPS | Lapse due to unpaid annual fee |