KR920004983B1 - Injecting process for the powder coal into the blast furnace - Google Patents
Injecting process for the powder coal into the blast furnace Download PDFInfo
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- KR920004983B1 KR920004983B1 KR1019890020419A KR890020419A KR920004983B1 KR 920004983 B1 KR920004983 B1 KR 920004983B1 KR 1019890020419 A KR1019890020419 A KR 1019890020419A KR 890020419 A KR890020419 A KR 890020419A KR 920004983 B1 KR920004983 B1 KR 920004983B1
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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
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
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- 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
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/0033—Charging; Discharging; Manipulation of charge charging of particulate material
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- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
Description
제 1 도는 종래방법에 따라 고로에 미분탄을 취입하기 위한 미분탄 취입장치의 개략도.1 is a schematic diagram of a pulverized coal injection device for blowing pulverized coal into a blast furnace according to a conventional method;
제 2 도는 본 발명에 따라 고도의 미분탄을 취입하기 위한 미분탄 취입장치의 개략도.2 is a schematic diagram of a pulverized coal injection device for blowing high pulverized coal according to the present invention;
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1, 1A, 1B : 저장조 2 : 투입밸브1, 1A, 1B: reservoir 2: inlet valve
3, 3a1, 3a2, 3a3, 3b1, 3b2, 3b3: 취입탱크 4 : 취입밸브3, 3a 1 , 3a 2 , 3a 3 , 3b 1 , 3b 2 , 3b 3 : Blowing tank 4: Blowing valve
5a : 이송밸브 6 : 충압밸브5a: Transfer valve 6: Charge valve
8a, 8b : 이송배관 11 : 고로8a, 8b: transfer piping 11: blast furnace
12 : 압력배출밸브12: pressure relief valve
본 발명은 석탄을 파쇄 미분탄으로 제조하여 고로에 취입하는 미분탄 취입설비가 각 고로별로 단독으로 설치되어 2개 이상의 고로가 있거나 2개 이상의 설비가 한 지역내에 설치되어 있을경우 각 설비에서 제조된 미분탄의 여유분을 부족한 타 설비로 상호이송하여 고로에 취입하는 고로의 미분탄 취입방법에 관한 것이다.According to the present invention, when the pulverized coal injection facility for producing coal and crushed coal is blown into the blast furnace is installed alone for each blast furnace, and there are two or more blast furnaces or two or more facilities are installed in one area, The present invention relates to a method for injecting pulverized coal of a blast furnace which is transported to another facility that lacks sufficient amount and blows into the blast furnace.
종래에는, 제 1 도에 나타난 바와 같이, 각 고로별로 설치된 미분탄 취입설비는 제조설비와 취입설비로 크게 분류 할 수 있다.Conventionally, as shown in FIG. 1, pulverized coal blowing facilities installed for each blast furnace can be broadly classified into manufacturing facilities and blowing facilities.
제조설비에서 제조된 미분탄은 취입설비의 저장조(1)에 저장되어 투입밸브(2)를 통하여 취입탱크(3)에 일정량을 투입한후 충압밸브(6)을 OPEN하여 충압후에 취입밸브(4)를 열어 압력에 의해 픽-업(10)까지 보낸 후 다량의 이송공기(9)로서 압송하여 고로(11)내부에 취입연소시키며 3개의 취입탱크중 1개의 취입탱크가 취입이 완료되면 즉시 다음 취입탱크가 취입을 시작하고 취입이 끝난 취입탱크는 압력배출밸브(12)를 통해 내부압력을 배출시킨후 재차 일정량을 투입받은후 충압된 상태에서 취입대기 하게 된다.The pulverized coal produced in the manufacturing facility is stored in the storage tank 1 of the blowing facility, and a certain amount is injected into the blowing tank 3 through the inlet valve 2, and then the
그러나, 상기 종래의 하나의 고로에 미분탄 제조설비 및 미분탄 취입설비가 설치되므로 1개의 미분탄 제조설비가 고장으로 인하여 휴지할 경우 해당 고로에는 미분탄 취입이 불가하거나 취입량을 감소하여야 하고 타 제조설비에서는 미분탄 제조량이 많아 남아돌아도 취입설비간의 이송방법 및 장치가 없어 이송취입이 불가하였다.However, since the pulverized coal production facility and the pulverized coal injection facility are installed in one conventional blast furnace, when one pulverized coal production facility is stopped due to a failure, the pulverized coal injection is not possible in the blast furnace or the amount of blown coal is reduced in other manufacturing facilities. Even if the production volume remained large, there was no transfer method and apparatus between the blowing facilities, and thus the transfer blowing was impossible.
따라서, 본 발명은 상기와 같은 문제점을 해결하기 위하여 두개의 고로에 대한 각 설비의 미분탄 저장조 하부에 위치한 3개의 미분탄 취입탱크중 하나를 이송탱크로 설정하고 이 이송탱크를 타 설비의 미분탄 저장소에 이송배관으로 연결하여 여유분의 미분탄을 취입탱크에 투입한 후 압력을 가하여 타 설비로 이송하여 타 고로에 취입할 수 있도록 하는 고로의 미분탄 취입방법을 제공하고자 하는데 그 목적이 있다.Therefore, in order to solve the above problems, the present invention sets one of three pulverized coal injection tanks located under the pulverized coal storage tank of each facility for two blast furnaces as a transfer tank and transfers the transfer tank to the pulverized coal storage of other facilities. The purpose of the present invention is to provide a method for blowing pulverized coal into a blast furnace, which is connected to a pipe, injects the extra pulverized coal into the blowing tank, and then transfers the pressure to other equipment to blow into the blast furnace.
이하, 도면을 통해 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the drawings.
본 발명은 제 2 도에 나타난 바와 같이 제조설비에서 제조된 미분탄은 취입설비의 저장조(1A)에 저장되어 투입밸브(2)를 통하여 취입탱크(3)에 일정량을 투입한후 충압밸브(6)를 열어 충압후에 취입밸브(4)를 열어 압력에 의해 픽-업(10)까지 보낸후 다량의 이송공기(9)로서 압송하여 고로(11)내부로 취입연소시키며 3개의 취입탱크중 한개의 취입탱크가 취입이 완료되면 즉시 다음 취입탱크가 취입을 시작하고 취입이 끝난 취입탱크는 압력배출밸브(12)를 통해 내부압력을 배출시킨후 재차 일정량을 투입받은후 충압된 상태에서 취입 대기하게 된다.As shown in FIG. 2, the pulverized coal produced in the manufacturing facility is stored in the storage tank 1A of the blowing facility, and a predetermined amount is introduced into the blowing tank 3 through the inlet valve 2, followed by a
이러한 진행은 연속적인 취입프로그램에 의해 자동으로 진행된다. 취입탱크(3a1, 3a2, 3a3)는 3개가 설치되어 있으나 2개만으로도 연속적으로 미분탄 취입이 가능하며 3개중 어느것이든지 1개는 예비기로 프로그램에서 제어가 가능하며 제어방법은 운전실에서 각 취입탱크별 선택스위치(인/아웃)를 아웃으로 선택하면 된다.This proceeds automatically by a continuous blowing program. Three injection tanks (3a 1 , 3a 2 , 3a 3 ) are installed but only two can be pulverized coal continuously. One of the three can be controlled by a program as a spare. Select the tank-specific selection switch (in / out) to out.
본 발명은 타고로의 미분탄 취입설비(이하, "상대설비"라 칭함)로 미분탄을 이송하는 방법에 그 특징이 있는것으로써, 3개의 취입탱크(3a1, 3a2, 3a) 1개를 이송탱크(3a3)로 선택하여 취입밸브(4)전단에서 상대설비 저장조(1B)까지 이송배관(8a)을 연결한후 이송밸브(5a)를 설치하며 이송시의 배관막힘 방지와 이송밸브를 차단시 배관내 미분탄 침적, 고착을 방지하고 배관을 청소할 수 있는 질소 투입밸브(7a)을 부착하다.The present invention is characterized by a method of transferring the pulverized coal to the pulverized coal blowing facility (hereinafter referred to as "relative facility") of the ride, and one of the three blowing tanks (3a 1 , 3a 2 , 3a) transfer tank Select (3a 3 ) to connect the transfer pipe (8a) from the front end of the intake valve (4) to the counterpart storage tank (1B), and then install the transfer valve (5a). A nitrogen inlet valve (7a) is installed to prevent pulverized coal deposit and seizure in the pipe and to clean the pipe.
이는 상대설비에도 동일하게 설치되어야만 한다.It must be installed equally in the counterpart equipment.
제 2 도에서 (3b1, 3b2, 3b3)는 취입탱크이고, 8b는 이송배관이며, 5b및 7b는 각각 이송밸브 및 질소 투입밸브를 나타낸다.In FIG. 2 , 3b 1 , 3b 2 , 3b 3 is a blow tank, 8b is a transfer pipe, and 5b and 7b represent a transfer valve and a nitrogen inlet valve, respectively.
상대설비로의 미분탄 이송방법은 3개의 취입탱크 모두를 정상적으로 운전할 경우 1개의 취입탱크(3a1)가 취입중일때 다른 한개의 취입탱크(3a2)는 미분탄을 투입받아 충압 상태에서 취입대기 상태이고 또 다른 한개의 취입탱크(3a3)는 취입완료 상태에서 내부 압력을 배출한후 재차 미분탄을 투입받아 질소 충압밸브(6)로서 충압된후 다시 취입대기 상태가 된다. 이때 취입대기 상태인 취입탱크(3a3)의 선택스위치를 아웃으로 선택하면 2개의 취입탱크(3a1, 3a2)만으로 연속적으로 미분탄을 취입할 수 있으며 아웃된 취입탱크(3a3)의 미분탄 이송밸브(5a)를 열면 이송탱크(3a3)내 미분탄은 미분탄 이송배관(8a)을 통해 상대 미분탄 저장조(1B)로 이송을 시작하게 된다.The method of conveying pulverized coal to the counterpart equipment is that when one of the three injection tanks is normally operated, when one injection tank 3a 1 is being blown, the other injection tank 3a 2 receives the pulverized coal and is in a blow-waiting state. Another blowing tank (3a 3 ) is discharged to the internal pressure in the blow-up state, and is again charged with the pulverized coal and charged with the nitrogen filling valve (6) and is in the stand-by waiting state again. At this time, if the selection switch of the blowing tank (3a 3 ), which is in the standby state, is selected as out, the pulverized coal can be continuously blown with only two blowing tanks (3a 1 , 3a 2 ) and the pulverized coal transfer of the blown out tank (3a 3 ) is carried out. When the valve 5a is opened, the pulverized coal in the transfer tank 3a 3 starts to be transferred to the relative pulverized coal storage tank 1B through the pulverized coal transfer pipe 8a.
이때 미분탄 이송속도의 증감은 충압밸브(6)의 압력배출밸브(12)를 조정하여 압력을 변동시켜 주므로서 가능하며 질소 투입밸브(7a)은 항시 소량의 질소가 투입될 수 있도록 열려 있어야 한다.At this time, the increase and decrease of the pulverized coal feed speed is possible by adjusting the
상대 미분탄 저장조(1B)로 이송된 미분탄은 상기한 미분탄 저장조(1A)에 저장된 미분탄과 같은 과정을 거쳐 고로에 취입된다.The pulverized coal transferred to the relative pulverized coal storage tank 1B is blown into the blast furnace through the same process as the pulverized coal stored in the pulverized coal storage tank 1A.
상기에서는 이송탱크가 3개의 취입탱크로 이루어진 기존의 취입설비를 이용한 것에 대해서만 설명을 하였지만, 상기 기존 취입탱크에 부가하여 이송탱크를 새로이 설치하여 이송배관으로 상대미분탄저장조에 연결하여 미분탄을 상대미분탄저장조로 이송하여 고로에 취입할수도 있다.In the above description, only the transfer tank uses the existing blowing facility consisting of three blowing tanks, but in addition to the existing blowing tank, a new transfer tank is installed and connected to the relative pulverized coal storage tank by a transfer pipe to connect the pulverized coal to the pulverized coal storage tank. It can also be transferred to and blown into the blast furnace.
상술한 바와 같이, 본 발명은 한 설비의 고장으로 인한 수리작업등 설비 이상이 발생하여도 타 설비의 미분탄 제조능력을 최대로 가동하여 여유분을 부족한 설비에 공급하므로서 2개설비 모두 지속적으로 미분탄을 취입할 수 있으며 저가의 미분탄을 취입하면 할 수록 취입량만큼의 고가의 코크스를 절감할 수 있어 고로에서의 용선생산 원가절감에 기여할 수 있으며, 또한, 고로설비는 미분탄을 지속적으로 일정하게 공급하여야만 고로의 열균형을 최상으로 유지할 수 있고 용선 생산량도 증산할 수 있으나 미분탄 취입의 급격한 저하나 중단의 경우 고로 노황의 악화로 연료중 코크스의 사용량이 증가하면서 용선 생산량도 저하하여 여러가지 부작용이 일어날수 있는데, 본 발명은 이러한 문제점들을 해결하므로서 고로 용선 생산시의 연료비 절감과 생산량 증대로서 용선 원가절감에 매우 효과적인 것이다.As described above, the present invention operates the pulverized coal production capacity of the other equipment to the maximum even when equipment abnormalities such as repair work due to the failure of one equipment are supplied to the equipment that lacks the spare, so that both facilities can continuously inject pulverized coal. The more coarse coal is charged, the lower the cost of coke can be reduced, which contributes to the cost reduction of molten iron production in the blast furnace. Although it is possible to maintain the best balance and increase the production of molten iron, in the case of a sudden drop in pulverized coal injection or interruption, the use of coke in fuel is increased due to the deterioration of blast furnace blast furnace, and the amount of molten iron is also reduced, which may cause various side effects. Solves these problems and reduces fuel costs in blast furnace chartering. It is very effective in the charter cost as increased acid amount.
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KR100891817B1 (en) * | 2007-07-13 | 2009-04-07 | 주식회사 포스코 | Control device for deviding and collecting dust coal |
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KR20030028067A (en) * | 2001-09-27 | 2003-04-08 | 주식회사 포스코 | Apparatus for flowing the pulverized coal with the reservior of the blast furnace |
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KR100891817B1 (en) * | 2007-07-13 | 2009-04-07 | 주식회사 포스코 | Control device for deviding and collecting dust coal |
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