KR100755454B1 - How to reduce explosion when ignition of radiation tube - Google Patents
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- KR100755454B1 KR100755454B1 KR20010083109A KR20010083109A KR100755454B1 KR 100755454 B1 KR100755454 B1 KR 100755454B1 KR 20010083109 A KR20010083109 A KR 20010083109A KR 20010083109 A KR20010083109 A KR 20010083109A KR 100755454 B1 KR100755454 B1 KR 100755454B1
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- 230000005855 radiation Effects 0.000 title claims abstract description 19
- 238000004880 explosion Methods 0.000 title claims abstract description 13
- 239000000446 fuel Substances 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 12
- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000006227 byproduct Substances 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
본 발명은 버너를 운전하는 도중에 소화하기 위한 데이터가 입력되면 연료라인 밸브를 차단하는 연료라인 밸브 차단 단계와, 상기 연료라인 밸브 차단단계에서 연료라인 밸브가 작동되어 차단되면 공기라인 밸브를 부분 차단하여 일정량의 공기가 튜브 내부로 공급되도록 하는 공기라인 밸브 부분 차단 단계와, 상기 공기라인 밸브 부분가 부분 차단되면 튜브 내의 온도를 감지하여 일정 온도를 유지하는 온도 감지 단계와, 버너를 점화하기 위한 데이터가 입력되면 공기라인 밸브를 온 하는 공기라인 밸브 온 단계와, 상기 공기라인 밸브가 온 된 후 연료라인 밸브를 온 하는 연료라인 밸브 온 단계와, 상기 연료라인 밸브가 온 되면 점화하는 점화 단계으로 이루어져, 연소용 공기를 이용한 복사 튜브내의 점화시 폭발발생 저감 방법에 관한 것이다. The present invention is a fuel line valve shut-off step of shutting off the fuel line valve when the data for extinguishing during the operation of the burner is input, and when the fuel line valve is operated and shut off in the fuel line valve blocking step to partially block the air line valve The air line valve part blocking step of supplying a certain amount of air into the tube, the temperature sensing step of detecting a temperature in the tube and maintaining a constant temperature when the air line valve part is partially blocked, and data for igniting the burner are inputted. Air line valve on step of turning on the air line valve, a fuel line valve on step of turning on the fuel line valve after the air line valve is turned on, and an ignition step of igniting when the fuel line valve is turned on. The present invention relates to a method for reducing the occurrence of explosion during ignition in a radiation tube using air.
공기라인 밸브, 온도 감지, 연료라인 밸브, 버너 Air Line Valves, Temperature Sensing, Fuel Line Valves, Burners
Description
도 1 은 선행 기술에 의한 복사 튜브의 점화 및 소화 운전시 연료와 연료용 공기의 공급선도를 나타낸 도면.1 is a view showing a supply diagram of fuel and air for fuel during the ignition and extinguishing operation of the radiation tube according to the prior art.
도 2 는 본 발명에 따른 복사 튜브의 점화 및 소화 운전시 연료와 연료용 공기의 공급선도를 나타낸 도면.2 is a view showing a supply diagram of fuel and air for fuel during the ignition and extinguishing operation of the radiation tube according to the present invention.
도 3 은 본 발명에 의한 복사 튜브 점화시 폭발 발생 저감 발생 방법을 설명하는 플로우챠트.3 is a flowchart for explaining a method of generating explosion reduction when ignition of a radiation tube according to the present invention;
본 발명은 복사 튜브 점화시 폭발 발생 저감 방법에 관한 것으로서, 보다 상세하게는 비청정처리된 제철부생가스(COG)를 연료로 사용하고,The present invention relates to a method of reducing explosion when igniting a radiation tube, and more specifically, using uncleaned steel by-product gas (COG) as a fuel,
복사 튜브(Radiant Tube)를 이용하여 간접가열을 온/오프 제어방식으로 열처리로 온도제어를 실시하는 경우에 오프 동작시 연소용 공기를 차단하지 않고 계속 복사 튜브 내로 공급하여 연료공급 라인의 오프시 누수 되어 집적되는 제철부생가스(COG)를 외부로 방출시키거나, 해당 복사 튜브 내에 집적된 제철부생 가스(COG)의 농도를 저감시킴에 의해 점화시 발생하는 제철부생가스(COG) 에 의한 폭발현상의 저감과 폭발력을 저감시키는 방법을 적용함에 의해 복사 튜브의 손상을 저감시키는 것을 특징으로 하는 연소용 공기를 이용한 복사 튜브내의 점화시 폭발발생 저감 방법에 관한 것이다.In case of indirect heating using radiant tube to control the temperature by heat treatment by on / off control method, leakage occurs when fuel supply line is turned off by continuously supplying into radiant tube without shutting off combustion air during off operation. Explosion phenomenon caused by COG generated during ignition by releasing COG that is accumulated and accumulated to the outside or reducing the concentration of COG accumulated in the radiation tube The present invention relates to a method for reducing explosion during ignition in a radiation tube using air for combustion, which is characterized by reducing damage to the radiation tube by applying reduction and explosion force reduction methods.
고급 후판재를 생산하는 설비인 후판열처리로는 강판표면에서 발생하는 스케일의 억제를 위해 질소분위기하에서 복사 튜브를 이용한 간접가열을 실시하고 있다.The thick plate heat treatment facility, which is a facility for producing high quality thick plate material, performs indirect heating using a radiant tube under a nitrogen atmosphere to suppress scale occurring on the surface of steel sheet.
통상 복사 튜브를 이용하여 간접 가열하는 경우에 문제가 되는 것은 가열온도가 비교적 높은 표준화 작업을 하는 경우에는 온도제어의 정도가 문제되지 않으나, 가열온도가 상대적으로 낮은 탬퍼링(Tempering) 작업의 경우는 투입되는 연료 량의 제어가 상대적으로 적은 연료 량을 사용하는 관계로 소모열량의 비해 투입열량의 비율이 가열온도가 높은 표준화에 비하여 상대적으로 작은 관계로 온도제어상의 어려움이 있는 상태이다.In general, the problem of indirect heating using a radiation tube is that the degree of temperature control is not a problem when the heating temperature is standardized, but in the case of a tempering operation where the heating temperature is relatively low. Since the control of the amount of fuel injected uses a relatively small amount of fuel, there is a difficulty in temperature control because the ratio of heat input to heat consumption is relatively small compared to standardization with high heating temperature.
통상 표준화 작업시 행하는 온도제어방법은 각각의 복사 튜브를 소화하지 않고 단지 연료 량을 줄여서 화염을 줄이는 비례미적분(PID) 제어에 의해 계속 연소시키는 방법과 노내의 온도를 균일하게 하기 위해 일부 버너를 소화하여 작업하다가 이들 버너를 다시 점화함과 동시에 다른 버너를 소화시키는 온/오프를 제어하여 도 1 에 도시된 바와 같이 연료라인(b)을 통해 연료가, 또한 공기라인(a)을 통해 공기가 공급되도록 한다. Normally, the temperature control method performed during the standardization operation does not extinguish each radiation tube, but continuously burns by proportional calculus (PID) control which reduces the amount of fuel and reduces the amount of fuel, and extinguish some burners to uniformize the temperature in the furnace. In order to ignite these burners and simultaneously control the on / off of extinguishing other burners so that fuel is supplied through the fuel line (b) and air through the air line (a) as shown in FIG. Be sure to
상기와 같이 온/오프 방식으로 제어를 하는 경우에 청정연료인 LNG, LPG를 사용하는 경우에는 점화와 소화를 위한 제어가 원활하게 이루어지나, 제철부생가스 인 제철부생가스(COG)를 사용하는 경우에는 가스 내에 흡착되어진 타르(Tar)와 같은 것에 의해 온/오프 밸브의 작동상에 오류를 발생시키게 된다.In case of using LNG or LPG, which is a clean fuel, the control for ignition and extinguishing is performed smoothly. However, in case of using iron byproduct gas (COG) There is an error in the operation of the on / off valve due to such as tar adsorbed in the gas.
이러한 오류로 인하여 비록 밸브를 완전히 닫은 상태에서도 계속 연료가 공급되는 리크(Leak)가 일어나, 이들 누수 된 연료가 복사 튜브관 내부에 집적되게 된다.This error results in a leak that continues to be supplied even when the valve is fully closed, so that these leaked fuels accumulate inside the radiation tube.
이처럼 복사 튜브 관내 부에 축적된 제철부생가스(COG)는 다시 해당 버너(burner)를 점화하는 순간에 폭발현상을 일으키게 되고 이로 인하여 복사 튜브를 둘러싸고 있는 세라믹 관(Ceramic Tube)의 파손이나, 경우에 따라서는 복사 튜브 자체가 망실되는 경우를 발생시키게 된다.As such, the COG accumulated in the radiant tube tube causes an explosion at the moment of ignition of the burner, which causes the breakage of the ceramic tube surrounding the radiant tube, This causes a case where the radiation tube itself is lost.
이러한 현상의 발생을 없애기 위해 밸브가 폐쇄되어도 누수 되는 제철부생가스(COG)를 연소시키기 위해 각각의 버너에 부착된 파일롯트 버너를 이용하여 연소시키는 방법을 생각할 수 있으나, 이는 온/오프 제어의 기본전략측면에서 소화되어야 할 버너가 계속 점화된 상태의 신호를 발생시켜서 전혀 온/오프 제어를 적용할 수 없는 결과를 발생시켜서 적용이 불가능하다.In order to eliminate the occurrence of this phenomenon, it is conceivable to use a pilot burner attached to each burner to burn COG, which leaks even when the valve is closed, but this is the basic principle of on / off control. In terms of strategy, the burner that needs to be extinguished generates a signal that is continuously ignited, resulting in an inability to apply on / off control at all.
또한 추가적으로 적용하는 방법으로는 누수 되는 제철부생가스(COG)를 해당 라인에 바이패스 라인을 추가하여 복사 튜브 내에 제철부생가스(COG)가 집적되는 것을 방지하는 것이나, 이것은 기존에 설치된 설비를 전부 개조하여야 하고, 바이패스 라인의 일반적인 특성상 해당 라인의 유속변화 및 방향의 변화로 인하여 접속부위에서 타르(Tar)가 집적될 가능성이 있는 문제점이 있다.In addition, a method of additionally applying a leaking steel off-gas (COG) to the bypass line by adding a bypass line to prevent the accumulation of steel off-gas (COG) in the radiation tube, but this is a retrofit of all existing installations In addition, due to the general characteristics of the bypass line, there is a problem in that tar may be accumulated at the connection part due to the change in the flow velocity and the direction of the corresponding line.
따라서, 본 발명은 상기와 같은 제반 결점을 해소하기 위하여 창출한 것으로서, 본 발명의 목적은 소화시에도 연소용 공기는 계속 투입이 되어져 누적되는 제철부생가스(COG)를 외부로 방출시킴과 동시에 잔여 제철부생가스(COG)와 많은 량의 공기를 혼합하여 폭발발생의 가능성을 저감시키는 방법을 제공하는데 있다. Therefore, the present invention was created to solve the above-mentioned shortcomings, and an object of the present invention is to continuously discharge the accumulated iron by-product gas (COG), which is accumulated while the combustion air is continuously added even during extinguishing, while remaining residual. The present invention provides a method of reducing the possibility of explosion by mixing steel gas by-product (COG) with a large amount of air.
상기의 목적을 달성하기 위하여 본 발명에 의한 복사 튜브 점화시 폭발 발생 저감 방법은, 버너를 운전하는 도중에 소화하기 위한 데이터가 입력되면 연료라인 밸브를 차단하는 연료라인 밸브 차단 단계와, 상기 연료라인 밸브 차단단계에서 연료라인 밸브가 작동되어 차단되면 공기라인 밸브를 부분 차단하여 일정량의 공기가 튜브 내부로 공급되도록 하는 공기라인 밸브 부분 차단 단계와, 상기 공기라인 밸브 부분가 부분 차단되면 튜브 내의 온도를 감지하여 일정 온도를 유지하는 온도 감지 단계와, 버너를 점화하기 위한 데이터가 입력되면 공기라인 밸브를 온 하는 공기라인 밸브라인 밸브 온 단계와, 상기 연료라인 밸브가 온 되면 점화하는 점화 단계로 이루어진 것을 특징으로 한다. In order to achieve the above object, a method of reducing explosion in ignition of a radiation tube according to the present invention includes a fuel line valve blocking step of shutting off a fuel line valve when data for extinguishing is input while driving a burner, and the fuel line valve. When the fuel line valve is operated and shut off in the blocking step, the air line valve is partially blocked to supply a certain amount of air into the tube, and when the air line valve is partially blocked, the temperature in the tube is sensed. A temperature sensing step of maintaining a constant temperature, an air line valve line valve on step of turning on an air line valve when data for ignition of a burner is input, and an ignition step of igniting when the fuel line valve is turned on do.
이하, 본 발명을 첨부된 도면을 참조하여 더욱 상세히 설명한다. Hereinafter, with reference to the accompanying drawings the present invention will be described in more detail.
도 2 는 본 발명에 따른 복사 튜브의 점화 및 소화 운전시 연료와 연료용 공기의 공급선도를 나타낸 도면이고. 도 3 은 본 발명에 의한 복사 튜브 점화시 폭발 발생 저감 방법을 설명하는 플로우챠트이다.2 is a view showing a supply diagram of fuel and air for fuel during the ignition and extinguishing operation of the radiation tube according to the present invention. 3 is a flowchart for explaining a method of reducing an explosion when igniting a radiation tube according to the present invention.
고급 후판재를 생산하는 설비인 후판 열처리로의 버너를 도 3의 단계 S1과 같이 버너를 온 되어 작동된 상태에서 버너를 소화하기 위한 데이터(단계 S2)가 입력되면, 단계 S3와 같이 연료라인 밸브를 차단한 후 단계 S4로 나아가서 공기라인 밸브를 부분적으로 차단한다.When the burner of the thick plate heat treatment furnace, which is a facility for producing high quality plate material, is inputted with data (step S2) for extinguishing the burner while the burner is turned on and operated as shown in step S1 of FIG. 3, the fuel line valve as shown in step S3. After blocking, go to step S4 to partially block the air line valve.
상기와 같이 연료가 완전히 차단되고 일정량의 공기가 공급된 상태에서 단계 S5와 같이 버너의 온도를 감지하여 일정상태를 유지하도록 온도유지 설비를 제어한 후 단계 S6, 단계 S7과 같이 현상태를 계속 유지하는 도중에 버너를 작동하기 위한 데이터가 입력되는 가를 설비의 작동을 제어하는 콘트롤러가 단계 S8에서 판단하는데, 그 결과 버너 작동 데이터가 입력되었으며, 단계 S9로 나아가서 공기라인 밸브를 온 한 후 단계 S10과 같이 연료라인 밸브를 온하여 도 2 에 도시된 바와 같이 연료라인(b)을 통해 연료를, 또한 공기라인(a)을 통해 공기를 공급한다. As described above, after the fuel is completely blocked and a predetermined amount of air is supplied, the temperature maintaining equipment is controlled to maintain a constant state by detecting the temperature of the burner as in step S5, and then the state is maintained as in steps S6 and S7. The controller controlling the operation of the facility determines whether data for operating the burner is entered in step S8. As a result, the burner operation data has been input, and the flow proceeds to step S9 to turn on the air line valve and then the fuel as in step S10. The line valve is turned on to supply fuel through fuel line b and air through air line a as shown in FIG. 2.
그리고 단계 S11에서는 점화 상태를 확인함과 동시에 버너의 온도를 감지하여 일정 온도를 유지하도록 한다. In step S11, the ignition state is checked and at the same time the temperature of the burner is sensed to maintain a constant temperature.
상술한 본 발명에 의하면 제철부생가스(COG) 누수에 의한 폭발발생 가능성과 폭발력의 저감으로 인하여 복사 튜브의 손상과 망실을 현저히 줄일 수 있으며, 이로 인하여 작업효율과 노의 안전성을 확보하고 설비보수에 들어가는 비용절감을 기할 수 있다.According to the present invention described above it is possible to significantly reduce the damage and loss of the radiation tube due to the explosion potential and the reduction of the explosive power due to the leakage of COG, thereby ensuring the work efficiency and the safety of the furnace and maintenance It can save cost.
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| KR20010083109A KR100755454B1 (en) | 2001-12-22 | 2001-12-22 | How to reduce explosion when ignition of radiation tube |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR870006959U (en) * | 1985-10-15 | 1987-05-11 | 김윤수 | Control device for combustion operation of automobile engine |
| KR960018431A (en) * | 1994-11-30 | 1996-06-17 | 이해규 | Absorption Refrigeration Fuel Valve Control Method |
| KR20060073122A (en) * | 2004-12-24 | 2006-06-28 | 현대자동차주식회사 | Starting device of engine for natural gas |
| KR20190000870A (en) * | 2018-12-24 | 2019-01-03 | (주)제이브이엠 | Device for dispensing medicine |
-
2001
- 2001-12-22 KR KR20010083109A patent/KR100755454B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR870006959U (en) * | 1985-10-15 | 1987-05-11 | 김윤수 | Control device for combustion operation of automobile engine |
| KR960018431A (en) * | 1994-11-30 | 1996-06-17 | 이해규 | Absorption Refrigeration Fuel Valve Control Method |
| KR20060073122A (en) * | 2004-12-24 | 2006-06-28 | 현대자동차주식회사 | Starting device of engine for natural gas |
| KR20190000870A (en) * | 2018-12-24 | 2019-01-03 | (주)제이브이엠 | Device for dispensing medicine |
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