KR100797852B1 - Discharge control method of exhaust fumes - Google Patents

Discharge control method of exhaust fumes Download PDF

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Publication number
KR100797852B1
KR100797852B1 KR1020060136412A KR20060136412A KR100797852B1 KR 100797852 B1 KR100797852 B1 KR 100797852B1 KR 1020060136412 A KR1020060136412 A KR 1020060136412A KR 20060136412 A KR20060136412 A KR 20060136412A KR 100797852 B1 KR100797852 B1 KR 100797852B1
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combustion chamber
combustion
exhaust gas
small flue
flow rate
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KR1020060136412A
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Korean (ko)
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백부순
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주식회사 포스코
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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B27/00—Arrangements for withdrawal of the distillation gases
    • C10B27/06—Conduit details, e.g. valves

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  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Control Of Combustion (AREA)

Abstract

A method for controlling flow rate of exhaust gas is provided to improve energy consumption efficiency by controlling exhaust gas exhausted to the outside in the reversing step. As a method for controlling flow rate of exhaust gas from a plurality of combustion chambers installed in a coke oven, the method comprises a step of burning fuel gas in a first combustion chamber that is at least one of the combustion chambers to convert coal charged into a coke oven chamber into coke, a step of discharging the exhaust gas that has been burnt in the combustion chamber through a small flue connected to the combustion chamber, a reversing step of preparing combustion in a second combustion chamber that is at least one of the combustion chambers except the first combustion chamber wherein the opening extent of a damper of the small flue is adjusted, and a step of burning fuel gas in the second combustion chamber.

Description

배기가스의 유량 제어 방법{DISCHARGE CONTROL METHOD OF EXHAUST FUMES }Flow control method of exhaust gas {DISCHARGE CONTROL METHOD OF EXHAUST FUMES}

도 1은 종래의 기술에 따른 코크스 오븐을 도시한 개략도이다.1 is a schematic diagram illustrating a coke oven according to the prior art.

도 2는 본 발명의 실시예에 따른 코크스 오븐과 그 주변 장치들을 도시한 구성도이다.2 is a block diagram illustrating a coke oven and its peripheral devices according to an embodiment of the present invention.

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

200 : 가스 라인 202: 가스 센서200: gas line 202: gas sensor

204: 가스 조절밸브 206: 분배관204: gas control valve 206: distribution pipe

210: 에어 라인 212: 에어 컨트롤부210: air line 212: air control unit

214: 에어 센서 220: 연소실214: air sensor 220: combustion chamber

222: 연소실 센서 230: 탄화실222: combustion chamber sensor 230: carbonization chamber

232: 상승관 234: 상승관 센서232: riser tube 234: riser sensor

240: 축열실 250: 소연도240: heat storage chamber 250: small flue

252: 소연도 댐퍼 254: 소연도 센서252: small smoke damper 254: small smoke sensor

260: 연돌 270: 제어부260: stack 270: control unit

본 발명은 코크스를 제조하는 코크스 오븐에 관한 것이며, 더욱 상세하게는 코크스를 생산하면서 발생하는 배기가스의 유량을 조절하여 에너지 효율을 향상시키는 방법에 관한 것이다.The present invention relates to a coke oven for producing coke, and more particularly to a method for improving energy efficiency by adjusting the flow rate of the exhaust gas generated while producing coke.

코크스 오븐은 석탄을 원료로 하여 고로에서 연료로 사용될 코크스를 생산하는 장치이며, 코크스의 품질은 고로에서의 용선 작업에 커다란 영향을 미치기 때문에 코크스의 생산 공정은 매우 중요하다.The coke oven is a device for producing coke, which is used as fuel in blast furnaces, using coal as a raw material, and the coke production process is very important because the quality of the coke has a great influence on the molten iron work in the blast furnace.

도 1은 종래의 기술에 따른 코크스 오븐을 도시한 개략도이다. 1 is a schematic diagram illustrating a coke oven according to the prior art.

코크스 오븐(10)는 석탄과 같은 원료가 장입되는 탄화실(8)과 이 탄화실(8)에 인접하게 설치되고 연료 가스와 공기가 주입되어 상기 탄화실(8) 내의 석탄이 건류되는데 필요한 열을 발생시키는 연소실(13) 및 고온의 연소가스와 연료/공기 사이 열교환이 이루어 지는 축열실(7)로 구성된다. 또한 상기 연소실(13)로 공급되는 연료 가스는 분배관(1)을 통해 공급되고, 이렇게 공급된 연료 가스가 연소실(13)에서 연소되며, 이렇게 발생된 배기가스는 연돌(6)을 통해 외부로 배출된다.The coke oven 10 is installed adjacent to a carbonization chamber 8 into which a raw material such as coal is charged and the carbonization chamber 8, and fuel gas and air are injected to heat the coal necessary for coaling in the carbonization chamber 8. And a heat storage chamber 7 in which heat exchange is performed between the combustion gas and the fuel / air at high temperature. In addition, the fuel gas supplied to the combustion chamber 13 is supplied through the distribution pipe 1, the fuel gas thus supplied is combusted in the combustion chamber 13, the exhaust gas generated in this way to the outside through the stack (6) Discharged.

여기서 상기 연소실(13)은 복수 개로 이루어지고, 두 개의 연소실(13)이 짝을 이룬다. 그리고 복수개의 연소실(13)은 홀수 번 연소실(11)과 짝수 번 연소실(12)로 구별되고, 탄화실(8)의 온도를 일정하게 유지하기 위해서 홀수 번 연소실(11)과 짝수 번 연소실(12)은 교대로 작동한다. 홀수 번 연소실(11)과 짝수 번 연소실(12)의 연소작용이 교대로 일어나는 것을 리버싱(Reversing)이라고 하며, 이러한 리버싱은 실린더와 풀 로드로 이루어진 리버싱 장치(미도시)에 의해서 수행된다.Here, the combustion chamber 13 is composed of a plurality, the two combustion chambers 13 are paired. The plurality of combustion chambers 13 are divided into odd-numbered combustion chambers 11 and even-numbered combustion chambers 12, and the odd-numbered combustion chambers 11 and even-numbered combustion chambers 12 are maintained in order to keep the temperature of the carbonization chamber 8 constant. ) Works in turn. Alternating combustion of the odd-numbered combustion chamber 11 and the even-numbered combustion chamber 12 is called reversing, which is performed by a reversing device (not shown) consisting of a cylinder and a full rod. .

한편, 리버싱 단계에서 연소실 내부의 가스를 외부로 배출시키게 되는데, 이때 외부 공기가 연소실 내부로 들어가게 된다. 따라서 연소실 내부의 온도가 떨어지게 되어 코크스 오븐의 에너지 소비 효율이 저하되는 문제점이 있다.On the other hand, in the reversing step to discharge the gas inside the combustion chamber to the outside, at this time the outside air enters into the combustion chamber. Therefore, the temperature inside the combustion chamber is lowered, there is a problem that the energy consumption efficiency of the coke oven is lowered.

본 발명은 리버싱 단계에서 외부로 배출되는 배기가스를 조절하여 에너지 소비 효율을 향상시키는 방법을 제공한다.The present invention provides a method of improving the energy consumption efficiency by adjusting the exhaust gas discharged to the outside in the reversing step.

본 발명에 따른 배기가스의 유량 제어 방법은, 코크스 오븐에 설치된 복수의 연소실로부터 배출되는 배기가스의 유량을 제어하는 방법으로서, 상기 복수의 연소실 중 적어도 하나의 제1 연소실에서 연료 가스를 연소시켜서 탄화실에 장입된 석탄을 코크스로 전환하는 단계, 상기 연소실에서 연소된 배기 가스를 상기 연소실과 연결된 소연도를 통하여 배출시키는 단계, 상기 적어도 하나의 제1 연소실을 제외한 제2 연소실에서의 연소를 준비하는 리버싱(reversing) 단계 및 상기 제2 연소실에서 연료 가스를 연소시키는 단계를 포함하고, 상기 리버싱 단계에서 상기 소연도의 댐퍼의 개구도를 조절한다.The method for controlling the flow rate of the exhaust gas according to the present invention is a method for controlling the flow rate of the exhaust gas discharged from a plurality of combustion chambers installed in a coke oven, by burning fuel gas in at least one first combustion chamber of the plurality of combustion chambers and carbonizing it. Converting the coal charged into the chamber into coke, discharging the exhaust gas combusted in the combustion chamber through the small flue connected to the combustion chamber, and preparing combustion in the second combustion chamber except the at least one first combustion chamber. Reversing step and the step of combusting the fuel gas in the second combustion chamber, in the reversing step to adjust the opening degree of the damper of the small smoke.

또한 본 발명의 실시예에서, 상기 리버싱 단계에서, 상기 소연도 댐퍼의 개구도는 2% 내지 5%일 수 있고, 상기 제1 연소실에 설치된 센서에 의해 측정된 상기 제1 연소실 내부의 압력 또는 온도에 따라 상기 소연도 댐퍼의 개구도를 조절할 수 있다.In an embodiment of the present invention, in the reversing step, the opening degree of the small flue damper may be 2% to 5%, and the pressure in the first combustion chamber measured by a sensor installed in the first combustion chamber or The opening degree of the small smoke damper can be adjusted according to the temperature.

또한 본 발명의 실시예에서, 상기 제2 연소실에 설치된 센서에 의해 측정된 상기 제2 연소실 내부의 압력 또는 온도에 따라 상기 소연도 댐퍼의 개구도를 조절할 수 있고, 상기 리버싱 단계에서, 상기 소연도의 댐퍼에 설치된 센서에 의해 상기 배기가스의 조성을 감지하여 상기 소연도 댐퍼의 개구도를 조절할 수 있다.In addition, in the embodiment of the present invention, the opening degree of the small smoke damper can be adjusted according to the pressure or the temperature inside the second combustion chamber measured by the sensor installed in the second combustion chamber, in the reversing step, the small smoke The opening of the small flue damper may be adjusted by detecting the composition of the exhaust gas by a sensor installed in the damper of FIG.

아래에서는 본 발명의 한 실시예에 따른 배기가스의 유량 제어 방법 에 대해 첨부한 도면을 참조로 하여 상세히 설명하겠다.Hereinafter, a method for controlling the flow rate of exhaust gas according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 실시예에 따른 코크스 오븐과 그 주변 장치들을 도시한 구성도이다.2 is a block diagram illustrating a coke oven and its peripheral devices according to an embodiment of the present invention.

도 2에 도시한 바와 같이, 코크스 오븐은 석탄이 장입되는 탄화실(230)과 인접하여 설치되고 연료 가스와 공기가 주입되어 상기 탄화실(230) 내의 석탄이 건류되는데 필요한 열을 발생시키는 연소실(220) 및 고온의 연소가스와 연료/공기 사이 열교환이 이뤄지는 축열실(240)로 구성된다. 이러한 연소실(220)로 공급되는 연료 가스는 분배관(206)을 통해 공급된다.As shown in FIG. 2, the coke oven is installed adjacent to a carbonization chamber 230 in which coal is charged, and a combustion chamber in which fuel gas and air are injected to generate heat necessary for coal coaling in the carbonization chamber 230. 220 and a heat storage chamber 240 in which heat exchange is performed between the hot combustion gas and the fuel / air. The fuel gas supplied to the combustion chamber 220 is supplied through the distribution pipe 206.

도시한 바와 같이 분배관(206)으로는 가스 라인(200)이 배치된다. 이러한 가스 라인(200)으로 COG와 BFG가 혼합된 연료 가스가 공급된다. 이러한 가스 라인(200)에는 가스 센서(202)와 연료 가스 조절밸브(204)가 장착된다. 특히 가스 센서(202)는 압력을 센싱하는 압력센서, 온도를 센싱하는 온도 센서 및 유량을 센싱하는 유량센서를 포함하는 군에서 선택된 하나 이상으로 구성된다.As illustrated, the gas line 200 is disposed in the distribution pipe 206. The gas line 200 is supplied with a fuel gas in which COG and BFG are mixed. The gas line 200 is equipped with a gas sensor 202 and a fuel gas control valve 204. In particular, the gas sensor 202 is composed of one or more selected from the group comprising a pressure sensor for sensing the pressure, a temperature sensor for sensing the temperature, and a flow rate sensor for sensing the flow rate.

코크스 오븐에는 가스 라인(200)과 인접하여 에어 라인(210)이 구비된다. 이러한 에어 라인(210)에는 에어 컨트롤부(212)와 에어 센서(214)가 장착된다. 특히 에어 센서(214)는 산소를 센싱하는 산소센서, 압력을 센싱하는 압력센서, 온도를 센싱하는 온도 센서 및 유량을 센싱하는 유량센서를 포함하는 군에서 선택된 하나 이상으로 구성된다.The coke oven is provided with an air line 210 adjacent to the gas line 200. The air line 210 is equipped with an air control unit 212 and the air sensor 214. In particular, the air sensor 214 is composed of one or more selected from the group comprising an oxygen sensor for sensing the oxygen, a pressure sensor for sensing the pressure, a temperature sensor for sensing the temperature, and a flow rate sensor for sensing the flow rate.

코크스 오븐의 연소실(220) 상부 측에는 연소실 센서(222)가 구비된다. 본 발명의 실시예에서, 연소실 센서(222)는 연소실(220)의 온도를 센싱하는 온도 센서 및 연소실의 압력을 센싱하는 압력센서를 포함하는 군에서 선택된 하나 이상으로 구성될 수 있다.The combustion chamber sensor 222 is provided at an upper side of the combustion chamber 220 of the coke oven. In an embodiment of the present invention, the combustion chamber sensor 222 may be configured with one or more selected from the group comprising a temperature sensor for sensing the temperature of the combustion chamber 220 and the pressure sensor for sensing the pressure of the combustion chamber.

또한 석탄이 건류되면서 발생하는 가스가 이동하도록 탄화실(230) 상부 측에 설치된 상승관(232)에는 상승관 센서(234)가 구비된다. 본 발명의 실시예에서, 상승관 센서(234)는 상승관(232)의 온도를 센싱하는 온도 센서 및 압력을 센싱하는 압력센서를 포함하는 군에서 선택된 하나 이상으로 구성될 수 있다.In addition, the riser sensor 234 is provided in the riser tube 232 installed at the upper side of the carbonization chamber 230 so that the gas generated while coal is dried. In an embodiment of the present invention, the riser sensor 234 may be composed of one or more selected from the group comprising a temperature sensor for sensing the temperature of the riser 232 and the pressure sensor for sensing the pressure.

연소실(220)에서 연소된 연소가스는 축열실(240)을 지나서 소연도(250)와 연돌(260)을 통하여 외부로 배출된다. 본 발명의 실시예에서는 소연도(250)에 소연도 댐퍼(252)와 소연도 센서(254)가 장착된다. 소연도 댐퍼(252)는 실린더(256)에 의해서 구동되어 소연도(250)를 통과하는 배기가스의 유량을 조절한다.The combustion gas combusted in the combustion chamber 220 passes through the heat storage chamber 240 and is discharged to the outside through the small flue 250 and the stack 260. In the embodiment of the present invention, the small flue damper 252 and the small flue sensor 254 are mounted on the small flue 250. The small flue damper 252 is driven by the cylinder 256 to regulate the flow rate of the exhaust gas passing through the small flue 250.

소연도 댐퍼(252)와 인접하여 소연도 센서(254)가 장착된다. 이러한 소연도 센서(254)는 소연도(250)를 지나는 배기가스의 온도나 압력 상태를 센싱하게 된다. 본 발명의 실시예에서는 소연도 댐퍼(252) 후단에 소연도 센서(254)가 장착되어 있지만, 다른 실시예에서는 소연도 댐퍼(252)의 전단에 소연도 센서(254)가 장착될 수 있다.A small flue sensor 254 is mounted adjacent to the small flue damper 252. The small flue sensor 254 senses the temperature or pressure state of the exhaust gas passing through the small flue 250. In the exemplary embodiment of the present invention, the small flue sensor 254 is mounted at the rear end of the small flue damper 252, but in another embodiment, the small flue sensor 254 may be mounted at the front end of the small flue damper 252.

도 2에 도시한 바와 같이, 소연도 댐퍼(252)는 제어부(270)와 전기적으로 연 결되어 있고, 소연도 댐퍼(252)는 제어부(270)의 컨트롤을 받아서 개구도가 변화된다.As shown in FIG. 2, the small flue damper 252 is electrically connected to the control unit 270, and the small flue damper 252 is controlled by the control unit 270 to change the opening degree.

본 발명의 실시예에서, 제어부(270)가 소연도 댐퍼(252)의 개구도를 조절하는 방법에 대해서 좀더 상세하게 설명하면, 제어부(270)는 에어 라인(210)의 에어 센서(214), 가스 라인(200)의 가스 센서(202), 연소실(220)의 연소실 센서(222), 상승관(232)의 상승관 센서(234) 혹은 소연도(250)의 소연도 센서(254)와 전기적으로 연결되어 있으면, 이들이 장착되어 있는 부분의 온도, 압력 및 상태 정보를 받아서 소연도 댐퍼(252)의 개구도를 컨트롤한다.In an embodiment of the present invention, the control unit 270 will be described in more detail with respect to the method of adjusting the opening degree of the small smoke damper 252, the control unit 270 is the air sensor 214 of the air line 210, The gas sensor 202 of the gas line 200, the combustion chamber sensor 222 of the combustion chamber 220, the rising tube sensor 234 of the rising pipe 232, or the small flue sensor 254 of the small flue 250 are electrically connected. If connected to the, control the opening degree of the small flue damper 252 receives the temperature, pressure and state information of the portion in which they are mounted.

한편 제어부(270)는 운전계획, 장입탄 정보(예를 들어 수분 함유율 등) 및 리버싱장치와도 연결되어 있으며, 이들의 상태 정보에 따라서도 소연도 댐퍼(252)의 개구도를 조절한다. 예를 들어, 탄화실에 투입되는 석탄의 수분 함유량이 많으면 배기가스가 많아지게 되어 소연도 댐퍼(252)의 개방 정도를 높일 수 있다.On the other hand, the control unit 270 is also connected to the operation plan, charging coal information (for example, water content, etc.) and the reversing device, and adjusts the opening degree of the small smoke damper 252 according to the state information thereof. For example, when the moisture content of the coal injected into the carbonization chamber is large, the exhaust gas is increased, thereby increasing the opening degree of the small flue damper 252.

본 발명의 실시예에서 연소 단계(CP:combustion period)는 홀수 연소실(220)에서 연소가 시작되어 끝나는 단계이고, 배출 단계(EP: exhaust period)는 홀수 연소실(220)의 연소가스를 외부로 배출시키는 단계이며, 리버싱 단계(RP: reversing period)는 홀수 연소실(220)의 연소가스가 배출이 완료된 시점부터 짝수 연소실(220)이 연소되기 전까지의 단계다.In the embodiment of the present invention, the combustion stage (CP) is a stage in which combustion starts and ends in the odd combustion chamber 220, and the exhaust stage (EP) exhausts the combustion gas of the odd combustion chamber 220 to the outside. The reversing period (RP) is a step from when the combustion gas of the odd combustion chamber 220 is discharged until the even combustion chamber 220 is combusted.

본 발명의 실시예에서, 연소 단계(CP)는 19min이고, 배출 단계(EP)는 35sec이며, 리버싱 단계(RP)는 25sec 이다. 특히 리버싱 단계(RP)에서 소연도 댐퍼(252)는 2% 내지 5%(거의 닫힌 상태, Almost Close state)의 개구도를 유지한다.In an embodiment of the present invention, the combustion stage CP is 19 min, the evacuation stage EP is 35 sec, and the reversing stage RP is 25 sec. In particular, in the reversing step RP, the small flue damper 252 maintains an opening degree of 2% to 5% (Almost Close state).

도 2를 참조하여 설명하면, 소연도 댐퍼(252)는 연료 가스의 유량에 따라서 개구도가 달라질 수 있다. 예를 들어서, 연료 가스의 양이 많아지면 연소실(220)에 가해지는 압력이 높아지게 되어, 배기가스의 유량도 높아진다.Referring to FIG. 2, the small flue damper 252 may have an opening degree that varies according to the flow rate of the fuel gas. For example, when the amount of fuel gas increases, the pressure applied to the combustion chamber 220 increases, and the flow rate of the exhaust gas also increases.

본 발명의 실시예에서, 배출 단계(EP)에 연료 가스를 공급하지 않고 에어만을 공급하는 이유는 리버싱 단계(RP)에 연소실에서 이상 폭발이 일어나지 못하도록 하기 위해 연소실(220)에 연소가스를 외부로 배출하기 위해서이다. 따라서 배출 단계(EP)의 기간이 길어지면 코크스 오븐은 폭발 위험성이 낮아져서 안전하게 운영될 수 있다. 하지만, 배출 단계(EP)의 기간이 길어지면 길어질수록 연소실(220)의 온도는 외부공기에 의해서 낮아지기 때문에 에너지 손실이 커진다. 뿐만 아니라 배출 단계(EP)의 기간이 길어지면 연소실(220) 내부의 내화물 온도가 급격히 떨어짐으로써 내화물의 수명이 짧아지는 문제점도 있다.In the embodiment of the present invention, the reason for supplying only air without supplying fuel gas to the discharge step EP is to supply the combustion gas to the combustion chamber 220 in order to prevent abnormal explosion in the combustion chamber during the reversing step RP. To be discharged. Therefore, the longer the duration of the discharge phase (EP), the lower the risk of explosion can be operated safely. However, the longer the duration of the discharge step EP, the greater the energy loss because the temperature of the combustion chamber 220 is lowered by external air. In addition, if the duration of the discharge step (EP) is long, there is a problem that the life of the refractory is shortened by a sharp drop in the refractory temperature in the combustion chamber (220).

본 발명의 실시예에서, 배출 단계(EP)와 리버싱 단계(RP) 동안에 연소실(220)의 연료 가스를 적절하게 배기시키면서 에너지의 손실을 줄이기 위해서 소연도 댐퍼(252)가 조절된다. 또한 배출 단계 35sec 동안에 연소실(220)의 연소가스를 외부로 배출시키기 위해서 소연도 댐퍼(252)의 개구도가 완전히 열린 상태를 유지한다.In the embodiment of the present invention, the small flue damper 252 is adjusted to reduce energy loss while properly exhausting the fuel gas in the combustion chamber 220 during the discharge step EP and the reversing step RP. In addition, in order to discharge the combustion gas of the combustion chamber 220 to the outside during the discharge step 35sec, the opening degree of the small flue damper 252 is maintained in a completely open state.

이상, 본 발명의 바람직한 실시예에 대하여 설명하였지만, 본 발명은 이에 한정되는 것이 아니고 특허청구범위와 발명의 상세한 설명 및 첨부한 도면의 범위 안에서 여러 가지로 변형하여 실시하는 것이 가능하고 이 또한 본 발명의 범위에 속하는 것이 당연하다.As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this, It can be variously modified and implemented in a claim, the detailed description of an invention, and the attached drawing, and this invention is also this invention. Naturally, it belongs to the range of.

본 발명에 따른 배기가스의 유량 제어 방법에 의하면, 리버싱 단계에서 소연도 댐퍼의 개구도가 조절됨으로써 에너지 소비 효율이 높아진다.According to the method for controlling the flow rate of exhaust gas according to the present invention, the opening degree of the small flue damper is adjusted in the reversing step, thereby increasing the energy consumption efficiency.

Claims (5)

코크스 오븐에 설치된 복수의 연소실로부터 배출되는 배기가스의 유량을 제어하는 방법으로서,A method of controlling the flow rate of exhaust gas discharged from a plurality of combustion chambers installed in a coke oven, 상기 복수의 연소실 중 적어도 하나의 제1 연소실에서 연료 가스를 연소시켜서 탄화실에 장입된 석탄을 코크스로 전환하는 단계;Combusting fuel gas in at least one first combustion chamber of the plurality of combustion chambers to convert coal charged in the carbonization chamber into coke; 상기 연소실에서 연소된 배기 가스를 상기 연소실과 연결된 소연도를 통하여 배출시키는 단계;Discharging the exhaust gas combusted in the combustion chamber through the small flue connected to the combustion chamber; 상기 적어도 하나의 제1 연소실을 제외한 제2 연소실에서의 연소를 준비하는 리버싱(reversing) 단계; 및A reversing step of preparing combustion in a second combustion chamber other than the at least one first combustion chamber; And 상기 제2 연소실에서 연료 가스를 연소시키는 단계를 포함하고,Combusting fuel gas in the second combustion chamber, 상기 리버싱 단계에서 상기 소연도의 댐퍼의 개구도를 조절하는 배기가스의 유량 제어 방법.The flow rate control method of the exhaust gas for adjusting the opening degree of the damper of the small smoke in the reversing step. 제1항에 있어서,The method of claim 1, 상기 리버싱 단계에서, 상기 소연도 댐퍼의 개구도는 2% 내지 5%인 배기가스의 유량 제어 방법.In the reversing step, the opening degree of the small flue damper is 2% to 5% flow rate control method of the exhaust gas. 제2항에 있어서,The method of claim 2, 상기 제1 연소실에 설치된 센서에 의해 측정된 상기 제1 연소실 내부의 압력 또는 온도에 따라 상기 소연도 댐퍼의 개구도를 조절하는 배기가스의 유량 제어 방법.And controlling the opening degree of the small flue damper according to the pressure or the temperature inside the first combustion chamber measured by the sensor installed in the first combustion chamber. 제2항에 있어서,The method of claim 2, 상기 제2 연소실에 설치된 센서에 의해 측정된 상기 제2 연소실 내부의 압력 또는 온도에 따라 상기 소연도 댐퍼의 개구도를 조절하는 배기가스의 유량 제어 방법.And controlling the opening degree of the small flue damper according to a pressure or a temperature inside the second combustion chamber measured by a sensor installed in the second combustion chamber. 제1항에 있어서,The method of claim 1, 상기 리버싱 단계에서, 상기 소연도의 댐퍼에 설치된 센서에 의해 상기 배기가스의 조성을 감지하여 상기 소연도 댐퍼의 개구도를 조절하는 배기가스의 유량 제어 방법.In the reversing step, the exhaust gas flow rate control method for controlling the opening degree of the small flue damper by sensing the composition of the exhaust gas by a sensor installed in the damper of the small flue.
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