KR20040055997A - Method for preventing external air from flowing into a walking beam type heating furnace - Google Patents

Method for preventing external air from flowing into a walking beam type heating furnace Download PDF

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Publication number
KR20040055997A
KR20040055997A KR1020020082499A KR20020082499A KR20040055997A KR 20040055997 A KR20040055997 A KR 20040055997A KR 1020020082499 A KR1020020082499 A KR 1020020082499A KR 20020082499 A KR20020082499 A KR 20020082499A KR 20040055997 A KR20040055997 A KR 20040055997A
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South Korea
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furnace
external air
heating furnace
beam type
inlet
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KR1020020082499A
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Korean (ko)
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이동은
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주식회사 포스코
재단법인 포항산업과학연구원
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Priority to KR1020020082499A priority Critical patent/KR20040055997A/en
Publication of KR20040055997A publication Critical patent/KR20040055997A/en

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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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
    • C21D9/54—Furnaces for treating strips or wire
    • C21D9/56—Continuous furnaces for strip or wire
    • C21D9/562—Details
    • C21D9/565—Sealing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0073—Seals
    • F27D99/0075—Gas curtain seals

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Details (AREA)

Abstract

PURPOSE: A method and an apparatus for preventing inflow of external air into walking beam type reheating furnace are provided to prevent the external air flown in from an entrance of the reheating furnace from diffusing into the reheating furnace by injecting upward an internal air in a lower part of the entrance of the reheating furnace. CONSTITUTION: In an apparatus for blocking an external air flown into the inside of the reheating furnace from an entrance region of walking beam type reheating furnace, the apparatus for preventing inflow of the external air into the walking beam type reheating furnace comprises an inner gas passageway(14) formed on an inner lower bottom surface of the entrance region of the reheating furnace; a blower(13) installed at the inner gas passageway to blow an inner gas of the reheating furnace; and a plurality of injection nozzles(12) for injecting an inner gas of high temperature flown into the inner gas passageway to form a gas curtain(16) for blocking an external air flown into the entrance region of the reheating furnace, wherein two rows or more of the injection nozzles are installed on the inner lower bottom surface of the entrance region of the reheating furnace.

Description

워킹빔형 가열로의 외부공기 유입방지방법 및 장치{METHOD FOR PREVENTING EXTERNAL AIR FROM FLOWING INTO A WALKING BEAM TYPE HEATING FURNACE}Method and device for preventing the inflow of external air into the heating beam type furnace {METHOD FOR PREVENTING EXTERNAL AIR FROM FLOWING INTO A WALKING BEAM TYPE HEATING FURNACE}

본 발명은 워킹빔형 가열로의 외부공기 유입방지방법 및 장치에 관한 것으로서, 보다 상세하게는 워킹빔(Walking Beam)형 가열로 입구 하부에 내부공기를 상향으로 분사함으로써 워킹빔형 가열로 입구로부터 유입되는 외부공기가 가열로 내부로 확산되는 것을 방지하는 워킹빔형 가열로의 외부공기 유입방지방법 및 장치에 관한 것이다.The present invention relates to a method and apparatus for preventing inflow of external air into a working beam type furnace, and more particularly, by injecting internal air upward from a lower portion of the inlet of a walking beam type furnace to be introduced from the inlet of the working beam type furnace. The present invention relates to a method and apparatus for preventing the inflow of external air into a working beam type heating furnace which prevents external air from diffusing into the heating furnace.

일반적으로, 도 1에 도시된 바와 같이, 워킹빔형 가열로는 상부 및 하부버너(4,5) 등의 발열수단에 의해 슬래브와 같은 피가열체(1)를 가열하는 설비이다.In general, as shown in Fig. 1, the working beam type heating furnace is a facility for heating a heated object 1, such as a slab, by heating means such as upper and lower burners 4,5.

즉, 가열로 입구영역(6)의 가열로 게이트(9)를 개방한 다음, 내부가 고온상태로 유지된 가열로 내부로 피가열체(1)를 장입하게 된다.That is, the heating gate 9 of the heating inlet region 6 is opened, and then the heating element 1 is charged into the heating furnace in which the inside is kept at a high temperature.

상기 장입된 피가열체(1)는 가열로 내부에 다수 설치된 지지대(3)에 의해 지지되는 가로 지지빔(2) 위에 놓여진 상태에서 가열로 입구영역(6)에서 지속적으로 피가열체(1)를 장입함으로써 상기 가로 지지빔(2) 상을 서서히 이동하게 되면서 가열되는 것이다.The charged object 1 is continuously heated in the furnace inlet region 6 in a state where it is placed on the horizontal support beam 2 supported by the support 3 installed in the furnace. It is heated while gradually moving on the horizontal support beam (2) by charging.

상기와 같이 연속적으로 장입되는 피가열체(1)는 가열로 하부에 설치된 다수의 하부버너(4)와 가열로의 루프(Roof)부에 설치된 다수의 상부버너(5)에 의하여 내부가 가열되며, 가열된 고온의 내부공기는 입구영역(6)에서 상향으로 연통 설치된 배기구(8)를 통하여 배기되어 내부 분위기를 유지하게 된다.The to-be-heated member 1 which is continuously charged as described above is heated inside by a plurality of lower burners 4 installed in the lower part of the heating furnace and a plurality of upper burners 5 installed in the roof part of the heating furnace. The heated high-temperature internal air is exhausted through the exhaust port 8 installed upwardly in the inlet region 6 to maintain the internal atmosphere.

그러나, 상기한 바와 같이, 가열로의 입구영역(6)에서 가열로 내부로 장입될 때, 도 2 내지 도 3에 도시된 바와 같이, 게이트 리프팅수단(10)에 의하여 가열로 게이트(9)가 들어올려진 후 피가열체(1)를 가열로 내부로 장입되는데,However, as described above, when charged into the furnace in the inlet region 6 of the furnace, as shown in FIGS. 2 to 3, the furnace gate 9 is opened by the gate lifting means 10. After being lifted up, the heating element 1 is charged into the heating furnace.

상기 게이트(9)가 들어올려질 때, 외부공기가 빗금친 영역(11), 즉 가열로 입구와 피가열체(1)의 사이공간(11)을 통하여 외부공기가 가열로 내부로 유입된다.When the gate 9 is lifted up, the outside air is introduced into the furnace through the area 11 where the outside air is hatched, that is, the space 11 between the furnace inlet and the object to be heated 1.

이러한 외부공기의 가열로 내부공간으로의 유입은 가열로 입구부근의 온도를 떨어뜨릴 뿐 아니라, 공기 중 산소에 의해 피가열체(1) 표면의 산화를 촉진하는 문제를 유발하여 가열되어 열처리되는 피가열체(1)의 열처리품질을 저하시키고, 원하는 소재의 기계적 특성을 얻을 수 없어 최종 제조되는 제품의 품질이 저하되는 문제점이 발생되고 있는 실정이다.The inflow of the external air into the inner space of the heating furnace not only lowers the temperature near the inlet of the heating furnace, but also causes the problem of promoting oxidation of the surface of the heating element 1 by oxygen in the air, thereby avoiding heat treatment. It is a situation that the problem of lowering the heat treatment quality of the heating body 1, obtaining the mechanical properties of the desired material and degrading the quality of the final manufactured product.

상기한 문제점을 해결하기 위하여, 본 발명은 가열로 입구영역의 내부 하부바닥면으로 가열로의 내부 분위기가스를 유입하여 상부로 분사함으로써 하부로부터 형성되는 고온 가스커튼을 형성시켜 가열로 내부에 들어오는 외부공기의 흐름을 차단함으로써 가열로의 내부분위기를 유지함과 동시에 보온할 수 있는 워킹빔형 가열로의 외부공기 유입방지방법을 제공하는데 그 목적이 있다.In order to solve the above problems, the present invention forms a hot gas curtain formed from the bottom by injecting the internal atmosphere gas of the heating furnace to the inner bottom bottom of the inlet area of the heating furnace and spraying it to the top to enter the inside of the heating furnace It is an object of the present invention to provide a method for preventing the inflow of external air into a working beam type heating furnace which can keep the internal atmosphere of the heating furnace and keep the internal atmosphere of the heating furnace by blocking the flow of air.

도 1은 워킹빔형 가열로의 형상을 도시한 개략적인 사시도;1 is a schematic perspective view showing the shape of a working beam type furnace;

도 2는 워킹빔형 가열로 입구에서의 공기유입영역을 도시한 정면 개략도;2 is a front schematic view showing an air inlet area at the entrance of a working beam type furnace;

도 3은 종래의 워킹빔형 가열로의 유입공기의 흐름을 도시한 입구영역의 측단면도;Figure 3 is a side cross-sectional view of the inlet area showing the flow of inlet air to a conventional working beam type furnace.

도 4는 본 발명에 따른 워킹빔형 가열로의 외부공기 유입방지방법 및 장치의 구성 및 개념을 도시한 측단면도;Figure 4 is a side cross-sectional view showing the configuration and concept of the method and apparatus for preventing the outside air inflow of the working beam type heating furnace according to the present invention;

도 5는 본 발명에 따른 워킹빔형 가열로의 외부공기 유입방지방법 및 장치를 구성하는 유입공기 분사노즐로부터 분사되는 상태를 도시한 개략적인 사시도이다.5 is a schematic perspective view showing a state of being injected from the inlet air injection nozzle constituting the method and apparatus for preventing the inflow of external air in the working beam type heating furnace according to the present invention.

♣도면의 주요부분에 대한 부호의 설명♣♣ Explanation of symbols for main part of drawing ♣

1:피가열체 6:가열로 입구영역 14:내부가스 통로DESCRIPTION OF SYMBOLS 1: Heating element 6: Heating furnace inlet area 14: Internal gas passage

13:송풍기 16:가스커튼 12:분사노즐13: Blower 16: Gas curtain 12: Injection nozzle

상기한 목적을 달성하기 위하여, 본 발명은 워킹빔형 가열로의 입구영역에서 가열로 내부로 유입되는 외부공기를 차단하는 방법에 있어서, 상기 가열로 내부의 고온의 분위기가스를 가열로 입구영역의 내부 하부바닥부로 유입한 다음, 상부로 분사노즐을 통하여 분사되는 가스커튼을 형성시킴으로써 가열로 입구에 형성되는 외부공기 유입영역으로부터의 외부공기 유입을 차단하는 것을 특징으로 하는 워킹빔형 가열로의 외부공기 유입방지방법을 제공한다.In order to achieve the above object, the present invention provides a method for blocking external air flowing into the heating furnace in the inlet region of the working beam type heating furnace, wherein the high-temperature atmosphere gas inside the heating furnace inside the heating inlet region After entering the lower bottom part, the outside air inflow to the working beam type furnace characterized in that the outside air inflow from the outside air inlet area formed at the inlet of the furnace by forming a gas curtain that is injected through the injection nozzle to the top Provide preventive measures.

또한, 본 발명은 상기 상부로 분사노즐을 통하여 분사되는 가스커튼이 상기 가열로의 배기구로 유입되는 외부공기를 배기하는 것을 특징으로 하는 워킹빔형 가열로의 외부공기 유입방지방법을 제공한다.In addition, the present invention provides a method for preventing the inflow of external air into the working beam type heating furnace, characterized in that the gas curtain injected through the injection nozzle to the upper to exhaust the external air flowing into the exhaust port of the heating furnace.

한편, 본 발명은 상기 가열로의 입구영역의 내부 하부바닥면에 형성되는 내부가스 통로와; 상기 내부가스 통로에 설치되어 가열로의 내부가스를 송풍시키는 송풍기와; 상기 가열로의 입구영역으로 유입되는 외부공기를 차단하는 가스커튼을 형성시키도록 상기 내부가스 통로로 유입된 고온의 내부가스를 분사하는 다수의 분사노즐(12)로 구성되는 것을 특징으로 하는 워킹빔형 가열로의 외부공기 유입방지장치를 제공한다.On the other hand, the present invention and the inner gas passage formed on the inner bottom bottom surface of the inlet region of the heating furnace; A blower installed in the inner gas passage to blow the inner gas of the heating furnace; Walking beam type, characterized in that composed of a plurality of injection nozzles 12 for injecting a high temperature internal gas introduced into the internal gas passage to form a gas curtain to block the external air flowing into the inlet region of the heating furnace Provides a device for preventing the inflow of external air to the furnace.

또한, 본 발명은 상기 분사노즐이 상기 가열로 입구영역의 내부 하부바닥면에 2열 이상을 설치되는 것을 특징을 하는 워킹빔형 가열로의 외부공기 유입방지장치를 제공한다.In another aspect, the present invention provides a device for preventing the inflow of external air to the working beam type heating furnace, characterized in that the injection nozzle is installed in two or more rows on the inner bottom bottom of the inlet area of the heating furnace.

이하, 첨부된 도면을 참조하여 본 발명의 구성 및 작용을 상세하게 설명한다.Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention.

도 4는 본 발명에 따른 워킹빔형 가열로의 외부공기 유입방지방법 및 장치의 구성 및 개념을 도시한 측단면도이고, 도 5는 본 발명에 따른 워킹빔형 가열로의 외부공기 유입방지방법 및 장치를 구성하는 유입공기 분사노즐로부터 분사되는 상태를 도시한 개략적인 사시도이다.Figure 4 is a side cross-sectional view showing the configuration and concept of the method and apparatus for preventing the outside air inflow of the working beam type heating furnace according to the present invention, Figure 5 is a method and apparatus for preventing the outside air inflow of the working beam type heating furnace according to the present invention. It is a schematic perspective view which shows the state sprayed from the inlet air injection nozzle which comprises.

본 발명은 가열로의 입구영역(6)으로부터 외부공기를 차단하기 위하여 가열로 내부의 고온가스를 하방에서 상방으로 분사하여 가스커튼(Gas Curtain; 16)을형성함으로써 가열로 외부공기의 유입을 차단하는데 근거를 두고 창안되었다.The present invention blocks the inflow of external air from the furnace by forming a gas curtain (16) by spraying hot gas inside the furnace from below to upward to block external air from the inlet region (6) of the furnace. It was created on the basis of

즉, 도 4에 도시된 바와 같이, 본 발명은 우선 가열로의 입구영역(6)에 근접하는 내부 바닥부 부위에 가열로의 내부가스를 유입할 수 있는 내부공기 통로(14)를 형성한다.That is, as shown in FIG. 4, the present invention first forms an internal air passage 14 through which the internal gas of the heating furnace can be introduced into the inner bottom portion close to the inlet region 6 of the heating furnace.

그런 다음, 상기 내부공기 통로(14)의 소정 위치에 고출력의 송풍기(13)를 설치하여 후방부에서 고온의 가스를 유입하도록 한다.Then, a high-power blower 13 is installed at a predetermined position of the internal air passage 14 so that hot gas is introduced from the rear portion.

상기 송풍기(13)에서 유입된 고온의 내부가스는 전방부, 즉 가열로 입구영역(6)의 하부에 다수 열로 상기 내부공기 통로(14)와 관통 형성된 분사노즐(12)을 통하여 상방으로 분사된다.The high temperature internal gas introduced from the blower 13 is injected upward through the injection nozzle 12 formed through the internal air passage 14 in a plurality of rows at the lower portion of the front part, that is, the furnace inlet region 6. .

상기 분사된 고온의 내부가스는 고압으로 분사됨으로써 가스커튼(16)이 입구부에 형성되어 외부공기의 유입을 차단하게 된다.The injected high temperature internal gas is injected at a high pressure so that the gas curtain 16 is formed at the inlet to block inflow of external air.

본 발명의 실시예에서는, 도 5에 도시된 바와 같이, 상기 분사노즐(12)이 2열로 설치되어 있으며, 이로부터 형성된 고온의 가스커튼(16)이 가열로 내부로 그대로 유입되게 할 수 있으나, 가열로 입구영역(6)으로부터 유입되는 외부공기와 이미 혼합된 상태이기 때문에 종래에 구성되었던 배기구(8)를 통하여 그대로 외부로 배출되게 구성하였다.In the embodiment of the present invention, as shown in Figure 5, the injection nozzle 12 is provided in two rows, the hot gas curtain 16 formed therefrom may be introduced into the furnace as it is, Since it is already mixed with the external air flowing from the inlet area 6 of the heating furnace, the exhaust port 8 is configured to be discharged to the outside as it is.

따라서, 가열로의 개폐 게이트(9)를 개방하여 피가열체(1)를 장입할 때 유입되는 외부공기는 본 발명에 따라 형성되어 하방에서 상방으로 분사되는 가스커튼(16)이 차단됨과 동시에 유입된 외부공기는 가스커튼(16)이 상방의 가열로 입구영역(6)의 상부에 형성된 배기구(8)로 배출됨으로써 이와 함께 배출되는 것이다.Therefore, the external air flowing in when opening and closing the heating gate 9 of the heating furnace to charge the heating element 1 is formed in accordance with the present invention, and at the same time the gas curtain 16 injected downward from above is blocked. The outside air is discharged together with the gas curtain 16 being discharged to the exhaust port 8 formed at the upper portion of the upper furnace inlet region 6.

그러므로 유입된 외부공기는 배기구(8)을 통하여 배출됨으로써 가열로 내부는 외부공기로부터 완벽하게 차단되고, 안정적으로 가열로 내부 분위기 및 내부온도를 유지할 수 있는 것이다.Therefore, the introduced external air is discharged through the exhaust port 8 so that the inside of the furnace is completely blocked from the outside air and can stably maintain the inside atmosphere and the internal temperature of the furnace.

상술한 바와 같이, 본 발명은 가열로 입구에서 유입되어 가열로 내부의 온도를 저하시키고, 피가열체 표면에 산화막을 형성시키는 외부공기를 내부의 고온가스를 유입하여 가스커튼을 형성함으로써 유입되는 외부공기 흐름을 상방으로 배기시켜 유입공기가 가열로 내부로 확산됨을 방지할 수 있고, 가열로 내부의 고온가스를 입구 쪽으로 순환시킴으로써 입구부근의 온도를 높이는 효과도 부가적으로 기대할 수 있다.As described above, the present invention is introduced from the inlet of the furnace to lower the temperature of the inside of the furnace, the outside air is introduced by forming a gas curtain by introducing a hot gas inside the outside air to form an oxide film on the surface of the heating object By exhausting the air flow upward, it is possible to prevent the inlet air from diffusing into the furnace, and additionally, the effect of raising the temperature near the inlet by circulating the hot gas inside the furnace toward the inlet can be additionally expected.

Claims (4)

워킹빔형 가열로의 입구영역(6)에서 가열로 내부로 유입되는 외부공기를 차단하는 방법에 있어서,In the method for blocking external air flowing into the heating furnace in the inlet region (6) of the working beam type heating furnace, 상기 가열로 내부의 고온의 분위기가스를 가열로 입구영역(6)의 내부 하부바닥부로 유입한 다음, 상부로 분사노즐(12)을 통하여 분사되는 가스커튼(16)을 형성시킴으로써 가열로 입구에 형성되는 외부공기 유입영역(11)으로부터의 외부공기 유입을 차단하는 것을 특징으로 하는 워킹빔형 가열로의 외부공기 유입방지방법.The high temperature atmosphere gas inside the furnace is introduced into the lower bottom portion of the furnace inlet region 6, and then formed at the inlet of the furnace by forming a gas curtain 16 that is injected through the injection nozzle 12. Method for preventing the inflow of external air to the working beam type heating furnace, characterized in that for blocking the inflow of external air from the external air inlet area (11). 제1항에 있어서,The method of claim 1, 상기 상부로 분사노즐(12)을 통하여 분사되는 가스커튼(16)은 상기 가열로의 배기구(8)로 가열로 입구로부터 유입되는 외부공기를 배기하는 것을 특징으로 하는 워킹빔형 가열로의 외부공기 유입방지방법.The gas curtain 16 injected through the injection nozzle 12 to the upper exhausts the external air flowing from the inlet of the heating furnace to the exhaust port 8 of the heating furnace. Prevention method. 워킹빔형 가열로의 입구영역(6)에서 가열로 내부로 유입되는 외부공기를 차단하는 장치에 있어서,In the device for blocking external air flowing into the furnace in the inlet region (6) of the walking beam type furnace, 상기 가열로의 입구영역(6)의 내부 하부바닥면에 형성되는 내부가스 통로(14)와;An internal gas passage 14 formed in an inner bottom surface of the inlet region 6 of the heating furnace; 상기 내부가스 통로(14)에 설치되어 가열로의 내부가스를 송풍시키는 송풍기(13)와;A blower (13) installed in the internal gas passage (14) to blow the internal gas of the heating furnace; 상기 가열로의 입구영역(6)으로 유입되는 외부공기를 차단하는 가스커튼(16)을 형성시키도록 상기 내부가스 통로(14)로 유입된 고온의 내부가스를 분사하는 다수의 분사노즐(12)로 구성되는 것을 특징으로 하는 워킹빔형 가열로의 외부공기 유입방지장치.A plurality of injection nozzles 12 for injecting a hot internal gas introduced into the internal gas passage 14 to form a gas curtain 16 to block the external air flowing into the inlet region 6 of the heating furnace. External air inflow prevention device of the working beam type heating furnace, characterized in that consisting of. 제3항에 있어서,The method of claim 3, 상기 분사노즐(12)은 상기 가열로 입구영역(6)의 내부 하부바닥면에 2열 이상이 설치되는 것을 특징을 하는 워킹빔형 가열로의 외부공기 유입방지장치.The injection nozzle 12 is an external air inflow prevention device of the heating beam type heating furnace, characterized in that two or more rows are installed on the inner bottom bottom of the furnace inlet area (6).
KR1020020082499A 2002-12-23 2002-12-23 Method for preventing external air from flowing into a walking beam type heating furnace KR20040055997A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160067291A (en) 2014-12-03 2016-06-14 주식회사 포스코 Heating furnace
CN106017119A (en) * 2016-07-14 2016-10-12 重庆赛迪热工环保工程技术有限公司 Sealing device for furnace body hole

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160067291A (en) 2014-12-03 2016-06-14 주식회사 포스코 Heating furnace
CN106017119A (en) * 2016-07-14 2016-10-12 重庆赛迪热工环保工程技术有限公司 Sealing device for furnace body hole
CN106017119B (en) * 2016-07-14 2023-11-10 重庆赛迪热工环保工程技术有限公司 Furnace body hole sealing device

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