KR100860020B1 - Oxy-fuel combustion boiler system having liquid-oxygen vaporizer exchanging heat with flue gas for carbon capture - Google Patents

Oxy-fuel combustion boiler system having liquid-oxygen vaporizer exchanging heat with flue gas for carbon capture Download PDF

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KR100860020B1
KR100860020B1 KR1020070135375A KR20070135375A KR100860020B1 KR 100860020 B1 KR100860020 B1 KR 100860020B1 KR 1020070135375 A KR1020070135375 A KR 1020070135375A KR 20070135375 A KR20070135375 A KR 20070135375A KR 100860020 B1 KR100860020 B1 KR 100860020B1
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boiler
exhaust gas
liquid oxygen
oxygen
heat
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KR1020070135375A
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Korean (ko)
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김혁주
김종진
박병식
최규성
안준
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한국에너지기술연구원
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
    • F02C3/20—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products
    • F02C3/22—Gas-turbine plants characterised by the use of combustion products as the working fluid using a special fuel, oxidant, or dilution fluid to generate the combustion products the fuel or oxidant being gaseous at standard temperature and pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/18—Flue gas recuperation
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat
    • 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
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Air Supply (AREA)

Abstract

An apparatus for increasing concentration of carbon dioxide in a pure oxygen combustion boiler having a heat exchanger for vaporizing liquid oxygen is provided to prevent frost due to moisture in exhaust gas when the exhaust gas is heat-exchanged with liquid oxygen. An apparatus for increasing concentration of carbon dioxide in a pure oxygen combustion boiler having a heat exchanger for vaporizing liquid oxygen comprises a boiler water chamber(11) and a boiler(10) having an exhaust pipe for discharging exhaust gas. A non-condensation economizer(20) performs heat transfer between the exhaust gas and water supplied to the boiler. A condensation economizer(50) separates moisture from the exhaust gas passing through the non-condensation economizer. A CO2 liquefier(30) liquefies carbon dioxide in the exhaust gas discharged from the boiler. A liquid oxygen tank(40) stores liquid oxygen.

Description

액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치{Oxy-fuel combustion boiler system having liquid-oxygen vaporizer exchanging heat with flue gas for carbon capture }Oxy-fuel combustion boiler system having liquid-oxygen vaporizer exchanging heat with flue gas for carbon capture}

본 발명은 순산소 연소보일러에서 배출되는 배기가스에 포함되어 있는 수분이 가지고 있는 응축열의 회수이용과 배기가스를 액체산소와 열교환시킴으로써 이산화탄소의 액화에 소요되는 에너지를 절약할 수 있고, 극저온(-183℃)의 액체산소와 열교환되는 동안에도 배기가스 중의 수분에 의한 결빙을 방지할 수 있는 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치에 관한 것이다.The present invention can save energy required for the liquefaction of carbon dioxide by recovering the condensation heat of moisture contained in the exhaust gas discharged from the oxy-fuel combustion boiler and heat-exchanging the exhaust gas with liquid oxygen. The present invention relates to a carbon dioxide high concentration device of a pure oxygen combustion boiler having a heat exchanger for vaporizing liquid oxygen, which can prevent freezing by moisture in exhaust gas even during heat exchange with liquid oxygen.

종래기술에 따른 이산화탄소 제조장치는 화학공정이나 식품공정 중에서 고농도의 이산화탄소가 생성되는 것을 활용하는 것이 일반적이었으며, 현재도 그렇게 생산되고 있다. 그러나 최근에는 점차 더워지고 있는 지구로 인해서 기상이변이나 자연재해의 급속한 증가로 인하여 지구의 생태환경이 매우 빠른 속도로 악화되고 있는 실정이다. 지구를 따뜻하게 하는 온실가스 중에 가장 대표적인 것이 이산화탄소이다. 따라서 이산화탄소를 대기중으로 배출시키지 말아야 한다는 것에 전 세계가 동의하고 있다. 이러한 이산화탄소는 석탄, 석유, 가스 등 화석연료의 연소과정에서 주로 발생되는데 이때 배출되는 이산화탄소를 대기중으로 배출시키지 않고 회수하여 처리하는 것이 필요하다.The carbon dioxide manufacturing apparatus according to the prior art has generally been utilized to produce a high concentration of carbon dioxide in a chemical process or a food process, and is still produced as it is. In recent years, however, the earth's ecological environment is rapidly deteriorating due to extreme weather and rapid increase of natural disasters due to the earth getting warmer. Carbon dioxide is the most representative of the greenhouse gases that warm the earth. Therefore, the world agrees that carbon dioxide should not be released into the atmosphere. This carbon dioxide is mainly generated in the combustion process of fossil fuels such as coal, oil, and gas, and it is necessary to recover and process the carbon dioxide emitted without discharging it into the atmosphere.

최근에는 연소과정에서 발생되는 이산화탄소를 고농도화 함으로서 회수 및 처리를 용이하게 할 목적으로 석탄, 석유, 가스 연료의 연소용 산화제로서 순산소를 사용하는 방안이 강구되고 있다.Recently, a method of using pure oxygen as an oxidant for combustion of coal, petroleum and gas fuel has been devised for the purpose of facilitating recovery and treatment by increasing the concentration of carbon dioxide generated in the combustion process.

이 때 사용되는 순산소는 일반적으로 고압용기에 액체 상태로 저장되어 있는 액체산소를 대기, 온수 또는 증기 열을 이용하여 별도의 열교환기를 통해 기화시켜 사용되고 있다.In this case, pure oxygen is generally used by vaporizing liquid oxygen stored in a liquid state in a high pressure vessel through a separate heat exchanger using air, hot water, or steam heat.

공업용 또는 실험용으로 사용되는 액체산소량이 많은 경우에는 액체산소 탱크의 크기도 클뿐만아니라 이에 상응하는 액체산소를 증발시키기 위한 대기식 기화기 역시 크기 면에서 상당한 규모를 가지게 된다. 또한 온수나 증기식 액체 산소 증발기의 경우에는 별도의 전기 또는 별도의 가열원을 구비하여 에너지를 공급해주어야 한다. In the case of large amounts of liquid oxygen used for industrial or experimental purposes, not only the size of the liquid oxygen tank is large, but also the atmospheric vaporizer for evaporating the corresponding liquid oxygen has a considerable size. In addition, in the case of hot water or steam type liquid oxygen evaporator, a separate electric or separate heating source should be provided to supply energy.

따라서 상기 대기식 액체산소 기화기를 설치하기 위한 공간의 확보, 상기 액체산소 기화기의 제작비용 및 에너지의 추가수요 등이 문제가 되고 있다.Therefore, securing a space for installing the atmospheric liquid oxygen vaporizer, the production cost of the liquid oxygen vaporizer and the additional demand of energy, etc. are a problem.

도 1에 도시된 바와 같이, 일본공개특허 평7-305830호는 액체산소제조장치(1)에서 액화된 산소를 저장탱크(2)에 저장된 후에 열교환기(3)를 거쳐 보일러장 치에 공급하고, 보일러(4)에서 산소와 연료를 연소시켜 이산화탄소와 수증기를 주성분으로 하는 배기가스를 발생시킨다. 보일러에서 발생된 배기가스는 SOx 및 NOx를 제거하는 처리부(5)에서 처리되고, 처리된 배기가스는 다시 열교환기(3)로 보내져 액화산소를 기화시켜 기상의 산소로 변화시키며 배기가스에 포함된 이산화탄소를 응고시킨다. 또한 배기가스의 일부는 송풍팬(6)을 거쳐 보일러(4)로 보내진다.As shown in FIG. 1, Japanese Patent Laid-Open No. 7-305830 discloses liquefied oxygen in a liquid oxygen production apparatus 1 in a storage tank 2 and then supplies it to a boiler apparatus through a heat exchanger 3. In the boiler 4, oxygen and fuel are combusted to generate exhaust gas mainly composed of carbon dioxide and water vapor. The exhaust gas generated from the boiler is processed by the processing unit 5 which removes SOx and NOx, and the treated exhaust gas is sent to the heat exchanger 3 again to vaporize liquefied oxygen to change into oxygen in the gaseous phase. Coagulate carbon dioxide. In addition, a part of the exhaust gas is sent to the boiler 4 via the blowing fan 6.

그러나, 일본공개특허 평7-305830호는 극저온의 액화산소와 배기가스가 열교환될 때 배기가스에는 이산화탄소와 함께 수분이 다량 포함되어 있기 때문에 어는 온도가 0℃인 수분이 열교환기의 표면에 먼저 결빙되게 되고, 따라서 이산화탄소가 고화되기 어려울 뿐만 아니라 결빙된 수분 및 이산화탄소로 인하여 배기가스가 지나가는 열교환기의 배기가스 통로가 완전히 막히게 되어 전체 설비의 가동을 불가능하게 하는 문제가 있다. However, Japanese Patent Application Laid-open No. Hei 7-305830 discloses that when the cryogenic liquefied oxygen and the exhaust gas exchange heat, the exhaust gas contains a large amount of moisture together with carbon dioxide, so that water having a freezing temperature of 0 ° C freezes on the surface of the heat exchanger first. Therefore, there is a problem that not only the carbon dioxide is difficult to solidify, but also that the exhaust gas passage of the heat exchanger through which the exhaust gas passes due to frozen water and carbon dioxide is completely blocked, thereby making the entire equipment impossible to operate.

본 발명의 목적은 순산소 연소보일러에서 배출되는 배기가스에 포함되어 있는 수분이 가지고 있는 응축열의 회수이용과 배기가스를 액체산소와 열교환시킴으로써 이산화탄소의 액화에 소요되는 에너지를 절약할 수 있고, 극저온(-183℃)의 액체산소와 열교환되는 동안에도 배기가스 중의 수분에 의한 결빙을 방지할 수 있는 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치를 제공함에 있다.An object of the present invention is to save the energy required for the liquefaction of carbon dioxide by recovering the use of condensation heat of the moisture contained in the exhaust gas discharged from the pure oxygen combustion boiler and heat exchange the exhaust gas with liquid oxygen, It is an object of the present invention to provide a high concentration of carbon dioxide in a pure oxygen combustion boiler having a liquid oxygen vaporization heat exchanger capable of preventing freezing due to moisture in the exhaust gas during heat exchange with liquid oxygen of -183 ° C).

본 발명의 다른 목적은 보일러에서 석탄, 석유류 및 가스 등의 연료를 연소시키기 위하여 기존의 공기 대신에 순산소를 사용하는 것으로서 액체산소탱크에서 공급되는 액체산소를 보일러에서 배출되는 배기가스와 열교환시켜 배기가스로부터 대량의 열량을 흡수하여 액체산소를 기화시킴으로서 기화기의 크기를 작게 할 수 있고, 대기식 기화기를 제거할 수 있으며, 보일러에서 배출되는 고농도의 CO2를 액화시킬 때 필요한 배기가스 중의 수분의 제거 및 배기가스의 온도 강하에 액체산소의 냉열을 활용함으로써 에너지를 대폭 절약할 수 있는 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치를 제공함에 있다.Another object of the present invention is to use pure oxygen instead of conventional air to burn fuel such as coal, petroleum and gas in a boiler, and the liquid oxygen supplied from the liquid oxygen tank is exchanged with the exhaust gas emitted from the boiler for exhaust. By absorbing a large amount of heat from the gas to vaporize liquid oxygen, the size of the vaporizer can be reduced, the atmospheric vaporizer can be removed, and the moisture in the exhaust gas required to liquefy the high concentration of CO 2 discharged from the boiler is removed. And a high concentration of carbon dioxide in a pure oxygen combustion boiler having a liquid oxygen vaporization heat exchanger capable of significantly saving energy by utilizing cold heat of liquid oxygen in the temperature drop of the exhaust gas.

본 발명의 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화 탄소 고농도화 장치는, 연료와 순산소를 반응시키는 연소과정에서 발생되는 열에 의해서 물의 가열을 위한 보일러수실 및 배기가스를 배출하기 위한 배기관이 설치되는 보일러와; 상기 보일러에서 배출된 고온의 배기가스와 보일러로 공급되는 물을 서로 열교환시키는 비응축형절탄기와; 상기 보일러에서 배출된 배기가스에 포함된 수분을 분리하는 응축형절탄기와; 상기 보일러에서 배출되는 배기가스 중의 이산화탄소를 액화시키는 CO2액화기와; 액체산소를 저장하는 액체산소탱크와; 상기 응축형절탄기와 CO2액화기 사이의 배기관에 위치하며 상기 액체산소탱크에 저장된 액체산소를 제공받아 상기 배기가스와 열교환시켜 기상의 순산소를 변화시키는 열교환기를 포함하는 것을 특징으로 한다.The high carbon dioxide enrichment apparatus of a oxy-fuel combustion boiler having a heat exchanger for liquid oxygen vaporization of the present invention is an exhaust pipe for discharging a boiler water chamber and exhaust gas for heating water by heat generated in a combustion process in which fuel and pure oxygen react. The boiler is installed; A non-condensing type coal blower for heat-exchanging hot exhaust gas discharged from the boiler and water supplied to the boiler; A condensation type cutter for separating moisture contained in exhaust gas discharged from the boiler; A CO 2 liquefier for liquefying carbon dioxide in exhaust gas discharged from the boiler; A liquid oxygen tank for storing liquid oxygen; Position to the exhaust pipe between the condensing jeoltan group CO 2 liquefier and is characterized in that accept provide liquid oxygen stored in the liquid oxygen tank includes a heat exchanger for changing the order of gaseous oxygen by heat exchange with the exhaust gas.

본 발명에 의한 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치는 배기가스에 포함되어 있는 수분을 일부 제거한 후에 액체산소와 열교환되도록 구성하고, 액체산소와 열교환되는 동안에도 열교환기의 표면에서 수분이 결빙되지 않아야 한다.The high concentration of carbon dioxide of the pure oxygen combustion boiler having a liquid oxygen vaporization heat exchanger according to the present invention is configured to exchange heat with liquid oxygen after removing some of the moisture contained in the exhaust gas, Moisture should not freeze at the surface.

이렇게 함으로서, 열교환기에서 배기가스의 온도만을 낮추기 때문에 극저온의 액체산소에 의한 이산화탄소 고화로 인하여 배기관이 막히는 문제를 해결할 수 있다.By doing so, since only the temperature of the exhaust gas is lowered in the heat exchanger, it is possible to solve the problem of clogging the exhaust pipe due to the solidification of carbon dioxide by cryogenic liquid oxygen.

또한, 열교환기에서 배기가스에 포함된 수분의 제거와 이산화탄소가 1차로 냉각되기 때문에 CO2액화기에서 배기가스의 액화가 용이하도록 저온으로 만들어서 CO2를 액화시키는데 필요한 에너지를 절약할 수 있다.Further, since the removal of carbon dioxide and moisture contained in the exhaust gas in the heat exchanger 1 to cool the car by making a low temperature to facilitate liquefaction of the exhaust gas in the CO 2 liquefier it can save the energy necessary for liquefying CO 2.

이하, 첨부한 도면을 참조하여 본 발명의 바람직한 실시예를 보다 상세하게 설명한다. Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

도 2는 본 발명에 따른 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치의 개략도이다.2 is a schematic diagram of a carbon dioxide high concentration device of a pure oxygen combustion boiler having a heat exchanger for liquid oxygen vaporization according to the present invention.

도시된 바와 같이, 본 발명에 따른 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치는 보일러(10), 비응축형절탄기(20), CO2액화기(30), 액체산소탱크(40), 응축형절탄기(50), 액체산소기화기(60)를 포함한다.As shown, the high concentration of carbon dioxide of the oxy-fuel combustion boiler having a heat exchanger for liquid oxygen vaporization according to the present invention is a boiler 10, non-condensing type coal mill 20, CO 2 liquefier 30, liquid oxygen tank 40, a condensation type blower 50, and a liquid oxygen vaporizer 60.

한편, 보일러(10)는 석탄, 석유 또는 가스 등의 연료와 연료를 산화시키는 순산소를 산화제를 함께 공급받아서 이들을 연소실에서 연소시켜 연소실을 둘러싸고 있는 보일러(10)내부의 보일러수실(11)에 들어 있는 물을 가열시키고, 연소과정에서 생성된 이산화탄소와 수증기를 주성분으로 하는 배기가스를 배기관(12)으로 배출시킨다. 이때, 보일러수실(11)에서 가열된 물은 증기 또는 온수의 형태로 난방, 발전이나 산업공정 등과 같은 용도로 활용된다. Meanwhile, the boiler 10 receives a fuel such as coal, petroleum or gas and pure oxygen for oxidizing the fuel together with the oxidant, and burns them in the combustion chamber to enter the boiler water chamber 11 inside the boiler 10 surrounding the combustion chamber. Existing water is heated, and exhaust gas mainly containing carbon dioxide and water vapor generated during the combustion process is discharged to the exhaust pipe 12. At this time, the water heated in the boiler water chamber 11 is utilized for applications such as heating, power generation or industrial processes in the form of steam or hot water.

절탄기(20)는 보일러에서 배출된 고온의 배기가스와 보일러수실(11)로 공급되는 물을 서로 열교환시킨다. 비응축형절탄기(20)로 공급되는 물의 양은 후술하는 응축형절탄기(50)를 통과한 물(25)을 사용할 수 있다. 비응축형절탄기(20)에서 열교환된 물은 보일러(10)에서 흡수하는 열량을 절약하여 연료의 소비를 줄일 수 있다. The blower 20 heat-exchanges the hot exhaust gas discharged from the boiler and the water supplied to the boiler water chamber 11. As the amount of water supplied to the non-condensing type coal mill 20, water 25 passed through the condensation type coal mill 50 to be described later may be used. The water heat-exchanged in the non-condensing coal mill 20 can reduce the consumption of fuel by saving the heat absorbed by the boiler (10).

CO2액화기(30)는 보일러에서 배출되는 배기가스 중의 이산화탄소를 액화시킨다.The CO 2 liquefier 30 liquefies the carbon dioxide in the exhaust gas discharged from the boiler.

액체산소탱크(40)는 보일러에서 사용되는 액체산소를 저장한다.Liquid oxygen tank 40 stores the liquid oxygen used in the boiler.

응축형절탄기(50)는 보일러에 공급되는 물을 이용하여 배출된 배기가스의 열을 회수할 뿐만아니라 배기가스에 포함된 수분을 응축시켜서 분리한다. 응축형절탄기(50)에 의해 배기가스에 포함된 수분이 일부 분리되면, 배기가스의 온도가 낮아져도 응축되는 수분이 감소되어서 수분의 결빙에 의해서 배기관이 막히는 현상을 줄일 수 있다. 이때, 응축형절탄기(50)로 공급되는 물의 양은 유량조절밸브(27)에 의해 조절되며, 응축형절탄기(50)에서 열교환된 물은 다시 비응축형절탄기(20)로 공급된다. The condensation type blower 50 not only recovers heat of the exhaust gas discharged using water supplied to the boiler, but also condenses and separates moisture contained in the exhaust gas. When the water contained in the exhaust gas is partially separated by the condensation type coal mill 50, even when the temperature of the exhaust gas is lowered, the condensed water is reduced, thereby reducing the phenomenon that the exhaust pipe is blocked by freezing of moisture. At this time, the amount of water supplied to the condensation type blower 50 is controlled by the flow control valve 27, the water heat-exchanged in the condensation type blower 50 is supplied back to the non-condensing type blower (20).

액체산소기화기(60)는 응축형절탄기(50)와 CO2액화기(30) 사이의 배기관에 형성되며, 액체산소탱크(40)에서 저장된 액체산소를 제공받아 응축형절탄기(50)를 통과한 저온의 배기가스와 열교환시켜 액체산소를 기상의 순산소로 기화시키고, 배기가스의 온도를 더욱 감소시킨다. 이에 따라 액체산소는 배기가스로부터 대량의 열량을 흡수하여 기화되기 때문에 액체산소를 기화시키는 별도의 액체산소 기화기가 필요 없으며, 또한, 배기가스는 상기 액체산소에 열량을 빼앗겨 온도가 낮아진 상태이므로 배기가스중에 포함된 고농도의 CO2를 액화 처리하는데 필요한 냉각용 에너지를 절약할 수 있다.The liquid oxygen vaporizer 60 is formed in an exhaust pipe between the condenser type filter 50 and the CO 2 liquefier 30, and receives the liquid oxygen stored in the liquid oxygen tank 40 and passes through the condenser type filter 50. Heat exchange with the low temperature exhaust gas vaporizes the liquid oxygen to pure oxygen in the gas phase, further reducing the temperature of the exhaust gas. Accordingly, since liquid oxygen absorbs a large amount of heat from the exhaust gas and vaporizes, the liquid oxygen vaporizer does not need a separate liquid oxygen vaporizer to vaporize the liquid oxygen. In addition, since the exhaust gas is deprived of heat to the liquid oxygen, the temperature is lowered. It is possible to save the cooling energy required to liquefy the high concentration of CO 2 contained in the.

본 발명의 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치의 작동상태를 살펴본다.It looks at the operating state of the carbon dioxide high concentration device of the oxy-fuel combustion boiler having a heat exchanger for liquid oxygen vaporization of the present invention.

도시된 바와 같이, 석탄, 석유 또는 가스 등의 연료와 연료를 산화시키는 산화제인 순산소를 함께 공급받은 보일러(10)는 이들을 연소시켜 보일러(10)의 연소실을 둘러싸고 있는 보일러수실(11)의 물을 가열시키고, 연소 후의 이산화탄소와 수증기를 주성분으로 하는 배기가스를 배기관으로 배출시킨다. 이때, 보일러수실(11)에서 가열된 물은 증기 또는 온수의 형태로 난방, 발전이나 산업공정 등과 같은 용도로 활용된다.As shown in the drawing, the boiler 10 supplied with fuel such as coal, oil or gas and pure oxygen, which is an oxidizing agent for oxidizing the fuel, burns them and the water in the boiler water chamber 11 surrounding the combustion chamber of the boiler 10. Is heated and exhaust gas mainly composed of carbon dioxide and water vapor after combustion is discharged to the exhaust pipe. At this time, the water heated in the boiler water chamber 11 is utilized for applications such as heating, power generation or industrial processes in the form of steam or hot water.

보일러(10)에서 연소된 고온의 배기가스는 비응축형절탄기(20)로 공급되고, 비응축형절탄기(20)에서 급수관(26)을 따라 보일러수실(11)로 공급되는 물과 서로 열교환된다. 온도가 낮아진 배기가스는 CO2액화기(30)로 공급되어 액화되고, 예열된 물은 보일러수실(11)로 공급된다. 따라서, 보일러수실(11)로 공급된 예열된 물은 보일러(10)에서 흡수하는 열량을 크게 하여 연료의 소비를 줄일 수 있다. 이때, 물의 공급양은 유량조절밸브(27)에 의해 조절된다. The high-temperature exhaust gas combusted in the boiler 10 is supplied to the non-condensing type coking machine 20, and is heat-exchanged with water supplied to the boiler water chamber 11 along the water supply pipe 26 from the non-condensing type coking machine 20. . The exhaust gas whose temperature is lowered is supplied to the CO 2 liquefier 30 to be liquefied, and the preheated water is supplied to the boiler water chamber 11. Therefore, the preheated water supplied to the boiler water chamber 11 may increase the amount of heat absorbed by the boiler 10 to reduce fuel consumption. At this time, the supply amount of water is controlled by the flow control valve (27).

비응축형절탄기(20)를 통과한 배기가스는 응축형절탄기(50)로 공급되어 배기가스에 포함된 수분을 분리한다. 이와 같이, 배기가스에 포함된 수분이 일부 분리 되면, 배기가스의 온도가 낮아져도 액체산소 증발기에서 결빙을 줄일 수 있어서 배기관의 손상 또는 기능 저하를 방지할 수 있다.The exhaust gas that has passed through the non-condensing type coal mill 20 is supplied to the condensation type coal mill 50 to separate moisture contained in the exhaust gas. As such, when some of the moisture included in the exhaust gas is separated, freezing of the liquid oxygen evaporator may be reduced even when the temperature of the exhaust gas is lowered, thereby preventing damage or deterioration of the exhaust pipe.

한편, 액체산소탱크(40)에 저장된 액체산소는 응축형절탄기(50)에서 배기가스와 열교환되어 순산소로 기화된다. 이때, 액체산소와 열교환된 배기가스는 온도가 더욱 낮아진 상태로 CO2액화기(30)로 공급된다. 이에 따라, 액체산소탱크에서 공급된 액체산소는 큰 잠열에 의해 응축형절탄기(50)에서 배기가스로부터 대량의 열량을 흡수하여 기화되기 때문에 액체산소를 기화시키는 액체산소 대기식 기화기의 용량을 작게 하거나 제거할 수 있다. 또한, 배기가스는 상기 액체산소에 열량을 빼앗겨 다음단계인 CO2액화기(30)에 입력되는 배기가스의 온도가 크게 낮아지게 되어 CO2를 액화시키는데 필요한 에너지를 절약할 수 있다.On the other hand, the liquid oxygen stored in the liquid oxygen tank 40 is heat-exchanged with the exhaust gas in the condensation type blower 50 is vaporized into pure oxygen. At this time, the exhaust gas heat-exchanged with the liquid oxygen is supplied to the CO 2 liquefier 30 in a state where the temperature is further lowered. Accordingly, since the liquid oxygen supplied from the liquid oxygen tank is vaporized by absorbing a large amount of heat from the exhaust gas in the condensation type filter 50 by a large latent heat, the capacity of the liquid oxygen atmospheric vaporizer for vaporizing the liquid oxygen is reduced or Can be removed In addition, the exhaust gas is deprived of heat to the liquid oxygen, so that the temperature of the exhaust gas input to the next step CO 2 liquefier 30 is significantly lowered to save the energy required to liquefy the CO 2 .

본 발명은 상술한 바람직한 실시예들에만 한정되는 것이 아니라 본 발명의 요지를 벗어나지 않는 범위 내에서 여러 가지로 개량, 변경, 대체 또는 부가하여 실시할 수 있는 것임은 당해 기술 분야에 통상의 지식을 가진 자라면 용이하게 이해할 수 있을 것이다. 이러한 개량, 변경, 대체 또는 부가에 의한 실시가 이하의 첨부된 특허청구범위의 범주에 속하는 것이라면 그 기술사상 역시 본 발명에 속하는 것으로 간주한다.It is to be understood that the present invention is not limited to the above-described preferred embodiments but may be practiced in various ways without departing from the spirit of the present invention. If you grow up, you can easily understand. If the implementation by such improvement, change, replacement or addition falls within the scope of the appended claims below, the technical idea is also regarded as belonging to the present invention.

도 1은 종래의 보일러 배기가스 처리시스템의 개략도.1 is a schematic diagram of a conventional boiler exhaust gas treatment system.

도 2는 본 발명에 따른 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치의 개략도. Figure 2 is a schematic diagram of a carbon dioxide high concentration device of a pure oxygen combustion boiler having a heat exchanger for liquid oxygen vaporization according to the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

10: 보일러 11: 보일러수실10: boiler 11: boiler water room

20: 비응축형절탄기 30: CO2액화기20: non-condensing type grinder 30: CO 2 liquefier

40: 액체산소탱크 50: 응축형절탄기40: liquid oxygen tank 50: condenser type

60 : 액체산소기화기60: liquid oxygen vaporizer

Claims (3)

연료와 순산소를 반응시켜서 발생하는 연소열을 물의 가열을 위한 보일러수실 및 배기가스를 배출하기 위한 배기관이 설치되는 보일러와;A boiler equipped with a boiler water chamber for heating water and an exhaust pipe for exhausting exhaust heat generated by reacting fuel and pure oxygen; 상기 보일러에서 배출된 고온의 배기가스와 보일러로 공급되는 물을 서로 열교환시키는 비응축형절탄기와;A non-condensing type coal blower for heat-exchanging hot exhaust gas discharged from the boiler and water supplied to the boiler; 상기 비응축형절탄기를 통과한 배기가스에 포함된 수분을 분리하는 응축형절탄기와;A condenser type separator for separating moisture contained in the exhaust gas that has passed through the non-condensing type pelletizer; 상기 보일러에서 배출되는 배기가스 중의 이산화탄소를 액화시키는 CO2액화기와;A CO 2 liquefier for liquefying carbon dioxide in exhaust gas discharged from the boiler; 액체산소를 저장하는 액체산소탱크와;A liquid oxygen tank for storing liquid oxygen; 상기 응축형절탄기와 CO2액화기 사이의 배기관에 위치하며 상기 액체산소탱크에서 저장된 액체산소를 제공받아 상기 배기가스와 열교환시켜 기상의 순산소로 변화시키는 액체산소기화기를 포함하는 것을 특징으로 하는 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장치.Located in the exhaust pipe between the condenser type and the CO 2 liquefier and the liquid oxygen vapor storage liquid containing a liquid oxygen vaporizer which is converted into a pure oxygen in the gas phase by heat exchange with the exhaust gas liquid High CO2 concentration device for oxy-fuel combustion boiler having a heat exchanger for oxygen vaporization. 제1항에 있어서, 상기 응축형절탄기는 비응축형절탄기로 공급되는 물을 공급받아 유입된 배기가스와 열교환시키는 것을 특징으로 하는 액체산소 기화용 열교환기를 가지는 순산소 연소보일러의 이산화탄소 고농도화 장According to claim 1, wherein the condenser type of carbon dioxide high concentration of the oxy-combustion boiler having a liquid oxygen vaporization heat exchanger, characterized in that the heat exchanged with the exhaust gas received by receiving the water supplied to the non-condensing type of coal mill. 삭제delete
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102644528A (en) * 2012-04-23 2012-08-22 北京建筑工程学院 CO2 catching device
CN107626183A (en) * 2016-11-15 2018-01-26 宁波瑞信能源科技有限公司 A kind of oxygen-enriched combusting collecting carbonic anhydride integrated system suitable for the operation of power network peak load

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JPH07119954A (en) * 1993-10-29 1995-05-12 Mitsui Eng & Shipbuild Co Ltd Apparatus for liquifying carbon dioxide gas in discharged gas from boiler
JPH07305830A (en) * 1994-05-16 1995-11-21 Shikoku Sogo Kenkyusho:Kk Exhaust gas treating system for boiler
JPH1113479A (en) * 1997-06-25 1999-01-19 Kawasaki Steel Corp Gas turbine power generation method
KR200199659Y1 (en) * 2000-04-26 2000-10-02 주식회사제너럴시스템 Improvement of boiler exhaust gas purifier

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Publication number Priority date Publication date Assignee Title
JPH07119954A (en) * 1993-10-29 1995-05-12 Mitsui Eng & Shipbuild Co Ltd Apparatus for liquifying carbon dioxide gas in discharged gas from boiler
JPH07305830A (en) * 1994-05-16 1995-11-21 Shikoku Sogo Kenkyusho:Kk Exhaust gas treating system for boiler
JPH1113479A (en) * 1997-06-25 1999-01-19 Kawasaki Steel Corp Gas turbine power generation method
KR200199659Y1 (en) * 2000-04-26 2000-10-02 주식회사제너럴시스템 Improvement of boiler exhaust gas purifier

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102644528A (en) * 2012-04-23 2012-08-22 北京建筑工程学院 CO2 catching device
CN107626183A (en) * 2016-11-15 2018-01-26 宁波瑞信能源科技有限公司 A kind of oxygen-enriched combusting collecting carbonic anhydride integrated system suitable for the operation of power network peak load
CN107626183B (en) * 2016-11-15 2024-04-02 宁波瑞信能源科技有限公司 Oxygen-enriched combustion carbon dioxide trapping integrated system suitable for peak-valley load operation of power grid

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