KR970002053Y1 - A checking device of tube closed with coke sharing tube - Google Patents
A checking device of tube closed with coke sharing tube Download PDFInfo
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- KR970002053Y1 KR970002053Y1 KR2019940035347U KR19940035347U KR970002053Y1 KR 970002053 Y1 KR970002053 Y1 KR 970002053Y1 KR 2019940035347 U KR2019940035347 U KR 2019940035347U KR 19940035347 U KR19940035347 U KR 19940035347U KR 970002053 Y1 KR970002053 Y1 KR 970002053Y1
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- pulverized coal
- pipe
- coal distribution
- distribution pipe
- air
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Blast Furnaces (AREA)
Abstract
내용없음.None.
Description
본 고안은 미분탄 분배지관의 막힘여부 감지장치에 관한 것으로, 더욱 구체적으로는 미분탄 분배탱크 외주연 상측에 형성된 다수의 미분탄 분배지관(미분탄 분배탱크에는 통상적으로 34개의 미분탄 분배지관이 설치되어 있다)에 소정의 에어를 공급시켜 에어배관 일측에 설치된 오리피스를 통과하는 에어유량에 따라 미분탄 분배지관의 막힘여부를 조기에 감지하여 미분탄을 용광로에 균등하게 공급시켜 설비의 가동률을 향상시킬 수 있도록 한 것이다.The present invention relates to a blockage detection device of the pulverized coal distribution pipe, and more specifically, to a plurality of pulverized coal distribution pipes formed on the outer circumference of the pulverized coal distribution tank (the pulverized coal distribution tank is usually provided with 34 pulverized coal distribution pipes). By supplying a predetermined air to detect the blockage of the pulverized coal distribution pipe early according to the air flow through the orifice installed on one side of the air pipe to supply the pulverized coal evenly to the furnace to improve the operation rate of the facility.
종래 기술에 의한 미분탄 분배지관의 막힘여부 감지장치는 도1에 도시된 바와같이 미분탄 분배탱크(1)에서 다수의 미분탄 분배지관(2) 외부에 온도계(3)를 설치하여 미분탄 분배지관(2) 내부로 흐르는 미분탄 자체의 온도(62∼65oC)를 온도계(3)가 감지하여 미리 정해진 설정치보다 낮을시 판널 램프가 점등되도록 함으로써 미분탄 분배지관(2) 내부 막힘여부를 확인하고 있으나, 미분탄 분배지관(2)의 막힘시 미분탄 전량이 미분탄 분배지관(2)내부에 존재하고 있는 관계로인해 계속해서 미분탄 자체의 온도가 일정 시간동안 유지되고, 이때 온도계(3)가 미분탄 분배지관(2) 내부에 미분탄이 공급되고 있다는 신호를 나타냄으로서 이에 따라 오작동, 오검지하는 문제와, 외부온도 변화에 따라 미분탄 분배지관(2)의 막힘여부를 판단해주는 온도계(3)가 오작동하는 결점으로 다수의 분배지관 중 일 방향은 미분탄 공급이 차단된 상태이므로 용광로(4) 원주 밸런스 파괴와 쇳물 온도 저하로 생선성이 감소되는 문제점을 갖는 것이었다.The detection device of the pulverized coal distribution pipe according to the prior art has a pulverized coal distribution pipe (2) by installing a thermometer (3) outside the plurality of pulverized coal distribution pipes (2) in the pulverized coal distribution tank (1), as shown in FIG. 1. Although the thermometer (3) detects the temperature of the pulverized coal itself flowing inside (62 to 65 o C) and the panel lamp is turned on when it is lower than a predetermined set value, it is checked whether the pulverized coal distribution pipe (2) is clogged inside. Due to the fact that the total amount of pulverized coal when the branch pipe 2 is blocked exists in the pulverized coal distribution branch pipe 2, the temperature of the pulverized coal itself is maintained for a certain time, and at this time, the thermometer 3 is inside the pulverized coal distribution pipe 2 This signal indicates that pulverized coal is being supplied to the unit, thereby causing a malfunction or misdetection, and a thermometer (3) for determining whether the pulverized coal distribution pipe (2) is clogged according to a change in external temperature. Since the direction of the plurality of distributed branch pipes one drawback is pulverized coal supply is shut off condition was with a problem that the fish sex reduced to furnace 4, the circumferential balance destroyed and the molten bath temperature is lowered.
본 고안은 상기와 같은 제반 문제점을 감안하여 이를 해소하고자 고안한 것으로, 미분탄 분배탱크 외주연 상측에 일단부가 연결되고 용광로에 연통된 블로우 파이프에 탄단부가 연결된 미분탄 분배지관에 소정압력의 에어를 공급시켜 에어배관 일측에 설치된 오리피스를 통과하는 에어유량에 따라 미분탄 분배지관의 막힘여부를 조기에 감지 후 조치함으로서 용광로내의 철광석 용융이 원주방향으로 균일하게 되어 용광로의 원주 밸런스 파괴됨을 방지할 수 있도록 한 미분탄 분배지관의 막힘 여부 감지장치를 제공하는데 그 목적이 있는 것이다.The present invention was devised to solve the above problems, and supplies air of a predetermined pressure to the pulverized coal distribution pipe having one end connected to the upper circumferential edge of the pulverized coal distribution tank and a coal end connected to the blow pipe connected to the furnace. By pulverizing coal ore in the blast furnace in the circumferential direction, the pulverized coal can be prevented from being destroyed in the circumferential direction by early detection of the blockage of the pulverized coal distribution pipe according to the air flow through the orifice installed at one side of the air pipe. It is an object of the present invention to provide a detection device for clogging the distribution pipe.
상기와 같은 목적을 달성하기 위한 본 고안의 특징은 미분탄 분배탱크 외주연 상측에 연통된 삼방밸브 각각에 고압에어 배관 및 미분탄 분배지관이 T자형으로 연결되고, 고압에어 배관에 수동차단 밸브 및 체크밸브가 설치된 것에 있어서, 상기 고압에어 배관 내부일측에 오리피스가 형성되고, 이와같이 오리피스 양측으로 형성된 도압관에 의해 측정된 오리피스 전후에 에어압력을 비교분석 하는 발신기가 설치되며, 상기 발신기로부터 수신되는 신호에 의해 미분탄 분배지관 내부에 미분탄의 막힘여부를 결정하는 제어부가 연결된 것이다.A feature of the present invention for achieving the above object is that the high-pressure air pipe and the pulverized coal distribution pipe are connected to each of the three-way valve connected to the upper side of the pulverized coal distribution tank in a T-shape, and the manual shut-off valve and the check valve are connected to the high-pressure air pipe. In the installed, the orifice is formed on one side of the inside of the high-pressure air pipe, and a transmitter for comparing and analyzing the air pressure before and after the orifice measured by the pressure guiding tube formed on both sides of the orifice in this way is installed, by the signal received from the transmitter The control unit is connected to determine whether the coal is blocked in the pulverized coal distribution pipe.
제1도는 종래기술에 의한 분배지관의 막힘 여부 감지장치의 구성을 나타낸 개략도.Figure 1 is a schematic diagram showing the configuration of the detection device for clogging the distribution pipe according to the prior art.
제2도는 본 고안에 의한 분배지관의 막힘 여부 감지장치의 구성을 나타낸 개략도.Figure 2 is a schematic diagram showing the configuration of the detection device for clogging the distribution pipe according to the present invention.
제3도는 제2도의 요부발췌도로서,3 is an excerpt of the main part of FIG.
제3a도는 A부위의 상세도.Figure 3a is a detailed view of the portion A.
제3b도는 B부위의 상세도.Figure 3b is a detailed view of the portion B.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 미분탄 분배탱크 2,2A : 미분탄 분배지관1: Pulverized coal distribution tank 2,2A: Pulverized coal distribution pipe
3 : 온도계 4 : 용광로3: thermometer 4: furnace
5 : 고압에어배관 6 : 오리피스5: high pressure air piping 6: orifice
7 : 도압관 8 : 발신기7: Pressure Gauge 8: Transmitter
9 : 제어부 10 : 삼방밸브9 control unit 10 three-way valve
14 : 블로우파이프 15 : 수동차단밸브14: blow pipe 15: manual shut-off valve
16 : 에어콤퓨레셔 17 : 미분탄 저장탱크16: air compressor 17: pulverized coal storage tank
본 고안의 미분탄 분배탱크(1)는 원통형으로서, 하부에 미분탄을 공급하는 메인배관(1A)이 볼트로 결합되어 있으며, 미분탄 분배탱크(1)의 상부 측면에 다수의 미분탄 분배지관(2)이 관통 용접 부착되고, 삼방밸브(10)는 볼밸브 형식으로서, 미분탄 분배지관(2)과 에어 배관(5)이 'T'형으로 결합되어 있으며, 상기 삼방밸브(10)에는 삼방밸브(10)의 개방 및 폐쇄용 접점 스위치(S1)(S2)(S3)가 있다.The pulverized coal distribution tank 1 of the present invention has a cylindrical shape, and a main pipe 1A for supplying pulverized coal to the lower part is coupled with a bolt, and a plurality of pulverized coal distribution pipes 2 are provided on the upper side of the pulverized coal distribution tank 1. Through welding is attached, the three-way valve 10 is a ball valve type, the pulverized coal distribution pipe (2) and the air pipe (5) is coupled in a 'T' type, the three-way valve (10) three-way valve (10) There is a contact switch (S 1 ) (S 2 ) (S 3 ) for opening and closing.
상기 미분탄 분배지관(2)은 균일한 미분탄 취입을 위해 다수의 미분탄 분배지관(2)이 동등한 길이와 직경으로 결합되어 있고, 또한 삼방밸브(10)에 볼트로 연결 고정되어 있는 동시에 미분탄 분배지관(2)의 진동 흡수용 플렉시블 호스(11)가 결합되어 있고, 그 상단 및 하부에는 각각의 수동 차단 밸브(12),(13)가 연결되며, 그리고 블로우 파이프(14) 내부에 미분탄 분배지관(2)을 삽입하는 구성으로 된다.The pulverized coal distribution pipe (2) is a plurality of pulverized coal distribution pipe (2) is coupled to the same length and diameter for uniform injection of coal dust, and is also connected to the three-way valve (10) bolted and fixed pulverized coal distribution pipe ( 2 is coupled to the vibration absorbing flexible hose 11, the upper and lower portions of each of the manual shut-off valves 12, 13 are connected, and the pulverized coal distribution pipe (2) inside the blow pipe (14) ) Is inserted.
상기에서 접점 스위치(S1)(S2)(S3)는 삼방밸브(10)를 운전자가 열림과 닫힘을 확인하기 위해 삼방밸브(10)를 상부에 열림 접점 스위치와 닫힘 접점 스위치가 부착되어 있고, 미분탄 공급시 열림 접점 스위치를 삼방밸브(10) 축이 지지하고 있고, 미분탄 차단시 열림 접점 스위치를 지지하고 있던 삼방밸브(10) 축이 떨어짐과 동시에 닫힘 접점 스위치에 지지하므로서, 운전실 판넬에서 삼방밸브(10)의 개폐여부 상태를 확인할 수 있도록 된 것이다.In the above-described contact switch (S 1 ) (S 2 ) (S 3 ) is a three-way valve (10) to open the three-way valve (10) in the upper contact switch and the closed contact switch is attached to the driver to confirm When the pulverized coal is supplied, the three-way valve 10 shaft supports the open contact switch, and when the pulverized coal is shut off, the three-way valve 10 shaft, which was supporting the open contact switch, falls and simultaneously supports the closed contact switch on the cab panel. The three-way valve 10 is to determine whether the opening or closing state.
한편 수동차단 밸브(15) 일측의 고압에어배관(5) 내부에는 오리피스(6)가 설치되고, 오리피스(6)의 양측으로는 에어배관 내부(5)의 에어압력을 측정하도록 형성된 도압관(7)에 에어압력을 비교 분석하는 발신기(8)가 설치되어 있다.Meanwhile, an orifice 6 is installed inside the high pressure air pipe 5 on one side of the manual shutoff valve 15, and a pressure pipe 7 formed to measure air pressure in the air pipe 5 on both sides of the orifice 6. ), A transmitter 8 for comparing and analyzing air pressure is provided.
상기 발신기(8)에 연결되어 수신되는 신호에 따라 미분탄 분배지관(2) 내부의 에어유량을 비교판단하여 미분탄의 막힘여부를 결정하는 제어부(9)가 연결된다.The control unit 9 is connected to the transmitter 8 to determine whether the pulverized coal is blocked by comparing and determining the air flow rate in the pulverized coal distribution pipe 2 according to the received signal.
상기와 같이 구성된 본 고안에 의한 미분탄 분배지관의 막힘여부 감지장치의 작용을 설명하면 다음과 같다.Referring to the operation of the detection device of the pulverized coal distribution pipe according to the present invention configured as described above are as follows.
본 고안은 먼저 미분탄 저장탱크(17)로부터 토출되는 미분탄이 에어콤퓨레셔(16)의 에어압으로 메인배관(1A)을 통해 미분탄 분배탱크(1)에 공급되는 것이며, 미분탄 분배탱크(1) 외주연 상측에 형성된 미분탄 분배지관(2)의 삼방밸브(10)와 미분탄 분배지관(2) 각각을 통해 토출되는 미분탄을 상기 삼방밸브(10)의 개방시(접점스위치(S1),(S2)는 열리고 접점스위치(S3)는 닫힘) 동일한 압력으로 균등하게 용광로(4)내부로 흘러들어가는 것이다.The present invention is that the pulverized coal discharged from the pulverized coal storage tank 17 is supplied to the pulverized coal distribution tank 1 through the main pipe 1A by the air pressure of the air compressor 16, the pulverized coal distribution tank 1 When the pulverized coal discharged through each of the three-way valve 10 and the pulverized coal distribution pipe 2 of the pulverized coal distribution pipe 2 formed on the outer circumferential edge of the three-way valve 10 is opened (contact switch S 1 ), (S 2 ) is open and the contact switch (S 3 is closed) flows into the furnace 4 evenly at the same pressure.
이때, 다수의 미분탄 분배지관(2)중 일측의 미분탄 분배지관(2)은 삼방밸브(10)의 폐쇄(접점스위치(S1),(S3)는 열리고 접점스위치(S2)는 닫힘)와 동시에 대기를 흡입시켜 에어콤퓨레셔(16)에 의해 고압으로 상승된 에어만이 통입시킬 수 있도록 되어 있다.At this time, the pulverized coal distribution pipe 2 of one side of the pulverized coal distribution pipe 2 is closed of the three-way valve 10 (contact switch (S 1 ), (S 3 ) is open and contact switch (S 2 ) is closed) At the same time, the air is sucked in so that only the air elevated to the high pressure by the air compressor 16 can be introduced therethrough.
또한 삼방밸브(10)에 연결된 고압에어 배관(5)의 수동차단밸브(15) 후단에 설치된 유량 검지 발신기(8)로 인하여 다수의 미분탄 분배지관(2)중 첫번째 미분탄 분배지관(2)에 연결된 삼광밸브(10)의 폐쇄(접점스위치(S1),(S3)는 열리고, 접점스위치(S2)는 닫힘)와 동시에 상기 미분탄 분배내부에 에어가 흘러들어 가는 것을 검지하도록 되어 있다. 이는 도3에 의거 에어 유량 기준점 F에서 F1유량 검지시 미분탄 분배지관(2)중 첫번째 미분탄 분배지관(2)이 막혀 있는 것을 검지하여 경보를 발생시킴으로써 운전자가 확인 가능케 할 수 있고, 또한 F2유량 검지시 미분탄 분배지관중 첫번째 미분탄 분배지관(2)이 관통되어 있다는 것을 검지할 수 있는 것이고, 삼광밸브(10)의 폐쇄(접점스위치(S1),(S3)는 열리고, 접점스위치(S2)는 닫힘)시 미분탄 분배지관(2) 내부에 에어를 통입시켜 관통여부를 확인 한 다음 다시 삼방밸브(10)를 개방 (S1),(S3)는 열림 (S2)는 닫힘)시 미분탄이 공급된다.In addition, the flow detection detector 8 installed at the rear of the manual shut-off valve 15 of the high-pressure air pipe 5 connected to the three-way valve 10 is connected to the first pulverized coal distribution pipe 2 among the pulverized coal distribution pipes 2. The closing of the three light valves 10 (contact switch S 1 , S 3 is open, contact switch S 2 is closed) and the flow of air into the pulverized coal distribution are detected. It can be confirmed by the driver by detecting that the first pulverized coal distribution pipe (2) of the pulverized coal distribution pipe (2) is blocked when detecting the F1 flow rate at the air flow reference point F according to Fig. 3, and also allowing the driver to confirm the F2 flow detection. It is possible to detect that the first pulverized coal distribution pipe (2) of the pulverized coal distribution pipe (2) is penetrated, the closing of the three light valve 10 (contact switch (S 1 ), (S 3 ) is opened, the contact switch (S 2) () Is closed) When air passes through the inside of the pulverized coal distribution pipe (2) to check whether the three-way valve (10) is opened again (S 1 ), (S 3 ) is open (S 2 ) is closed) Pulverized coal is supplied.
그리고 삼방밸브(10)의 개방(접점스위치(S1),(S2)는 열리고 접점스위치(S3)는 닫힘)시 미분탄 공급만 가능케 되므로 이때 에어 유량 F1 검지시에도 경보가 작동되지 않도록 삼방밸브(10)의 폐쇄(접점스위치(S1),(S3)는 열리고 접점스위치(S2)는 닫힘)시만 에어 유량을 검지하여 경보를 줄 수 있도록 인터록크에 설정된다.In addition, when the three-way valve 10 is opened (contact switch (S 1 ), (S 2 ) is opened and contact switch (S 3 ) is closed) only fine coal supply is possible, so that the alarm does not operate even when the air flow rate F1 is detected. Only when the valve 10 is closed (contact switch S 1 , S 3 is open and contact switch S 2 is closed) is set on the interlock so as to detect the air flow rate and give an alarm.
미분탄 분배지관중 첫번째 미분탄 분배지관(2)의 삼방밸브(10)의 개방(접점스위치(S1),(S2)는 열리고 접점스위치(S3)는 닫힘) 된 후 미분탄 분배지관중 인접한 두번째 미분탄 분배지관(2A)의 삼방밸브(10A)가 폐쇄(접점스위치(S1),(S3)는 열리고 접점스위치(S2)는 닫힘)되므로, 두번째 미분탄 분배지관(2A) 관통 및 막힘 여부를 검지할 수 있으며, 미분탄 분배지관(2)중 첫번째부터 마지막번까지 한 싸이클을 주기적으로 반복함으로서 에어유량을 검지하는 것이다.Among the pulverized coal distribution pipes, the first three-way valve 10 of the pulverized coal distribution pipe (2) is opened (contact switch (S 1 ), (S 2 ) is opened and contact switch (S 3 ) is closed), Since the three-way valve 10A of the pulverized coal distribution pipe 2A is closed (contact switches S 1 and S 3 are opened and the contact switch S 2 is closed), whether the second pulverized coal distribution pipe 2A is penetrated and blocked. It can detect the air flow rate by repeating one cycle periodically from the first to the last of the pulverized coal distribution pipe (2).
이와같이하여 미분탄 분배지관(2)이 미분탄에 의해 막힌 것을 감지하게 되면 막힌 미분탄 분배지관(2)측의 접점 스위치를 개방하고 에어콤퓨레셔(16)로부터 고압의 에어를 불어넣어 막힌부분을 관통하면 된다.In this way, when the pulverized coal distribution pipe 2 is detected by the pulverized coal, the contact switch on the side of the pulverized coal distribution pipe 2 is opened, and high pressure air is blown from the air compressor 16 to penetrate the blocked portion. do.
이상에서와 같이 본 고안에 의한 미분탄 분배지관의 막힘여부 감지장치는 미분탄 분배탱크(1)로부터 용광로(4) 외주연에 형성된 블로우 파이프(14)에 미분탄을 공급하는 미분탄 분배지관(2) 내부에 흐르는 미분탄 자체의 온도를 온도계(3)에 의해 미분탄 분배지관(2)의 막힘여부를 확인할 수 있음은 물론이고, 미분탄 분배지관(2)의 막힘 여부 감지를 위해 미분탄 차단과 동시에 일정한 시간동안 고압에어를 통입하였을 때 미분탄 분배지관(2) 내부로 흐르는 에어유량을 검지하여 미분탄 분배지관(2)의 막힘여부를 정확하게 판단하는 장치에 의해, 미분탄 분배지관의 막힘여부를 정확하게 감지 용광로 내에 미분탄의 취입량을 일정하게 되며 이로인해 용광로의 원주 밸런스의 파손됨을 보호할 수가 있는 것이다.As described above, the apparatus for detecting the blockage of the pulverized coal distribution pipe according to the present invention is a pulverized coal distribution pipe 2 that supplies pulverized coal to the blow pipe 14 formed at the outer periphery of the blast furnace 4 from the pulverized coal distribution tank 1. The temperature of the pulverized coal itself can be checked whether or not the pulverized coal distribution pipe 2 is blocked by the thermometer 3, and the high-pressure air for a predetermined time at the same time as the pulverized coal is blocked to detect whether the pulverized coal distribution pipe 2 is blocked. By detecting the amount of air flowing into the pulverized coal distribution branch pipe 2 when the fuel is injected into the pipe, the pulverized coal injection amount is injected into the blast furnace. This makes it possible to protect the circumferential balance of the furnace from being broken.
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| Application Number | Priority Date | Filing Date | Title |
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| KR2019940035347U KR970002053Y1 (en) | 1994-12-23 | 1994-12-23 | A checking device of tube closed with coke sharing tube |
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| KR970002053Y1 true KR970002053Y1 (en) | 1997-03-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100989785B1 (en) * | 2008-09-29 | 2010-10-25 | 현대제철 주식회사 | Apparatus and method for indication a defect of carburetting nozzle |
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| KR100376517B1 (en) * | 1999-08-26 | 2003-03-17 | 주식회사 포스코 | Apparatus for controlling air purge into feed line |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100989785B1 (en) * | 2008-09-29 | 2010-10-25 | 현대제철 주식회사 | Apparatus and method for indication a defect of carburetting nozzle |
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