KR100432159B1 - Pressure control apparatus for distributor in a fine coal blowing equipment - Google Patents

Pressure control apparatus for distributor in a fine coal blowing equipment Download PDF

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Publication number
KR100432159B1
KR100432159B1 KR10-2000-0036554A KR20000036554A KR100432159B1 KR 100432159 B1 KR100432159 B1 KR 100432159B1 KR 20000036554 A KR20000036554 A KR 20000036554A KR 100432159 B1 KR100432159 B1 KR 100432159B1
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South Korea
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pressure
distributor
pulverized coal
blown
valve
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KR10-2000-0036554A
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Korean (ko)
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KR20020002104A (en
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강찬이
엄주선
김용세
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주식회사 포스코
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/24Test rods or other checking devices
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/18Bell-and-hopper arrangements
    • C21B7/20Bell-and-hopper arrangements with appliances for distributing the burden
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B5/00Making pig-iron in the blast furnace
    • C21B5/001Injecting additional fuel or reducing agents
    • C21B5/003Injection of pulverulent coal

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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)
  • Air Transport Of Granular Materials (AREA)

Abstract

본 발명의 목적은 미분탄 제조설비에서 미분탄을 고로에 압송하여 취입하는 취입배관의 압력제어를 적정화시켜 고로내압의 급격한 상승에 따른 플렉시블 호스, 취입배관, 랜스 등의 파손 및 폭발사고 등의 대형설비사고와 인명사고를 사전에 예방함으로써 제품생산량을 안정적으로 유지할 수 있도록 한 미분탄 취입설비 분배기압력제어장치를 제공하는데 있다.It is an object of the present invention to optimize the pressure control of the blown pipe to blow the pulverized coal into the blast furnace in the pulverized coal manufacturing equipment, and to damage the large facilities such as flexible hoses, blown pipes, lances, etc. due to the rapid rise of the blast furnace pressure. It is to provide a distributor pressure control device for pulverized coal injection equipment which can maintain product production stably by preventing accidents and casualties.

본 발명의 구성은 미분탄 취입설비에서, 반송공기유량의 연산에 의한 퍼지시 미분탄 취입변 온 중에는 압력차단변(71)이 클로즈되도록 하고, 취입변의 취입정지나 퍼지작업시에는 상기 압력차단변(71)이 오픈되도록 하며, 이후 취입배관(32)내에 압력 상승으로 분배기압력이 상승하면 분배기 압력발신기(72)에서 이를 검출하여 분배기 압력조절계(200)에 압력상승 신호로 제공되게 하고 상기 압력조절계(200)에서는 노압발신기(50)에 의한 노압지시계의 노압신호가 비율기3(201)에서 처리되어 출력되는 노내압+1.5 이상의 설정값과 상기 분배기 압력이 비교되어 출력되게 하고, 상기 압력조절계의 출력으로 백 필터 배관라인에 설치된 압력조절변(70)의 개도가 제어되게 하는데 특징이 있다.The configuration of the present invention, in the pulverized coal blowing facility, the pressure cut-off valve 71 is closed during the pulverized coal injection valve temperature during purging by the calculation of the return air flow, and the pressure cut-off valve (71) during the injection stop or purge operation of the injection valve ) Is opened, and when the distributor pressure rises due to the pressure rise in the blown pipe 32, the distributor pressure transmitter 72 detects this and provides the pressure increase signal to the distributor pressure regulator 200 and the pressure regulator 200. ), The no-pressure signal of the no-pressure watch by the no-pressure transmitter 50 is processed by the proportioner 3 201, and the output value of the dispenser pressure is compared with the set value of the nominal pressure +1.5 or more, and the output of the pressure regulator is output. This is characterized in that the opening degree of the pressure control valve 70 installed in the bag filter piping line is controlled.

Description

미분탄 취입설비 분배기 압력제어 장치{Pressure control apparatus for distributor in a fine coal blowing equipment}Pressure control apparatus for distributor in a fine coal blowing equipment}

본 발명은 미분탄 제조설비에서 미분탄을 고로에 압송하여 취입하는 취입배관의 안정된 압력제어에 관한 것으로, 특히 취입배관의 분배기 압력을 적정하게 제어되도록 한 미분탄 취입설비 분배기의 압력제어장치에 관한 것이다.The present invention relates to a stable pressure control of the blown pipe for conveying the pulverized coal to the blast furnace in the pulverized coal production equipment, and more particularly to a pressure control device of the pulverized coal blowing equipment distributor to properly control the distributor pressure of the blown pipe.

일반적인 미분탄 제조설비는 저가 석탄인 콜(COAL)을 건조한 후 밀(MILL)에서 파쇄하여 상승관을 통해 백 필터로 보내진다. 백 필터에서는 파쇄된 콜에서 열풍 가스와 미분탄을 분리한다. 여기에서 분리된 미분탄은 저장호퍼에 모아진 후 취입설비로 제공되도록 하고 있다.A typical pulverized coal manufacturing facility is drying the low cost coal (COAL), then crushed in a mill (MILL) and sent to the bag filter through the riser. The bag filter separates hot air gas and pulverized coal from the crushed call. The pulverized coal separated here is collected in a storage hopper and provided as a blowing facility.

도 1은 전통적인 미분탄 취입설비의 압력제어장치의 전체 블록구성도를 보이고 있다. 여기에서 참고되는 바와 같이, 미분탄 저장호퍼로부터 피드호퍼(20)로 이송된 미분탄은 상기 피드호퍼(20)하부에 나란히 마련된 취입변1,2(21,22)가 열리면 압력에 의해 미분탄은 픽업(23)까지 압송된다.Figure 1 shows the overall block diagram of the pressure control device of the conventional pulverized coal blowing facility. As it is referred to here, the pulverized coal transported from the pulverized coal storage hopper to the feed hopper 20 is opened when the injection sides 1, 2 (21, 22) provided in parallel to the lower side of the feed hopper 20 by the pressure is picked up ( To 23).

상기 픽업(23)은 퍼지유량조절변(11)에서 반송공기관(12)을 통하여 공급되는 반송공기로 미분탄을 이송한다. 반송공기는 취입배관(32)을 통하여 고로의 블로우배관(61)에 공급되므로 여기에 부착된 취입랜스(36)를 통하여 고로 내부로 미분탄이 반송 취입된다.The pickup 23 transfers the pulverized coal to the conveying air supplied through the conveying air engine 12 from the purge flow control valve 11. Since the conveying air is supplied to the blow pipe 61 of the blast furnace through the blow pipe 32, the pulverized coal is blown into the blast furnace through the blow lance 36 attached thereto.

이와 같은 미분탄 취입설비에서 종래에는 반송공기유량 조절을 위해 퍼지유량 조절계(100)와 노내압발신기(50)를 통해 각 압력을 검출하고 이 검출값 중에서 노내압발신기(50)에 의한 압력값은 노내압지시계(120)를 통하여 비율기2(121)로 제공되게 하고, 이 비율기2(121)의 값은 비율기1(103)를 통한 취입량설정기(104)의 값과 연산기1(102)에서 연산처리되게 하고, 이 연산기1의 값은 선택스위치(101)를 통해 스위치되어 퍼지유량조절변(11)에 제어용 신호가 유량조절계(100)에서 생성되게 한다.In such a pulverized coal injection facility, each pressure is detected through a purge flow controller 100 and an internal pressure transmitter 50 to control the return air flow rate, and among the detected values, the pressure value of the internal pressure transmitter 50 is a furnace. It is provided to the proportioner 2 (121) through the pressure-resistant watch 120, the value of the proportioner 2 (121) is the value of the blow amount setter 104 and the calculator 1 (102) through the proportioner 1 (103) ), And the value of the operator 1 is switched through the selection switch 101 so that the control signal is generated in the flow controller 100 in the purge flow control valve 11.

또, 상기 유량조절계(100)는 선택스위치(101)가 연산기2(111)의 입력을 받도록 스위치되어 있는 경우라면, 미분탄 취입을 위한 3방변(31)에 직접 공압을 인가하는 지관 퍼지 유량의 압력을 검출하는 랜스퍼지 유량발신기(40)의 검출값을 상기 연산기2가 연산하여 그 연산값으로 상기 퍼지유량조절변(11)을 통해 공급되는 유량을 조절하게 된다.In addition, when the selection switch 101 is switched to receive the input of the calculator 2 (111), the flow controller 100 applies the pressure of the branch pipe purge flow rate to directly apply pneumatic pressure to the three-sided 31 for injecting pulverized coal. The calculator 2 calculates the detected value of the lance purge flow rate transmitter 40 to detect the flow rate, and adjusts the flow rate supplied through the purge flow control valve 11 to the calculated value.

이 유량, 즉 분배기(30)압력은 노내압력보다 항상 높게 유지되도록 하는데 취입배관(32)의 압력은 분배기압력으로 판단한다.The flow rate, that is, the distributor 30 pressure is always maintained higher than the furnace pressure, but the pressure of the blown pipe 32 is determined as the distributor pressure.

도 2는 종래의 미분탄 분배기 압력제어 시스템의 구체적인 블록구성도로서, 여기에서의 프로세스는 먼저, 퍼지유량의 결정 즉 반송공기유량의 결정은 선택스위치(101)가 1의 위치일 경우, 즉 연산기2(111)의 연산값을 취하도록 위치하고 있는 경우 반송공기유량설정값을 노내압력에 대한 공기유량 값과 미분탄취입량설정치에 대한 공기유량 값과 취입렌스지관퍼지유량 값을 연산하여 그 값으로 퍼지유량조절변(11)을 제어하고, 선택스위치(101)가 2일 경우, 즉 연산기1(102)의 연산출력 값을 취하도록 위치하고 있는 경우 반송공기유량설정 값은 노내압력에 대한 공기유량 값과 취입량 설정치에 대한 공기유량 값으로 반송공기유량 제어값을 결정하게 된다.2 is a detailed block diagram of a conventional pulverized coal distributor pressure control system, in which the process here first determines the purge flow rate, that is, the conveying air flow rate, when the selector switch 101 is in position 1, that is, the calculator 2; If it is located to take the calculated value of (111), the return air flow rate set value is calculated by calculating the air flow rate value for the furnace pressure, the air flow rate value for the pulverized coal injection amount, and the blown lance pipe purge flow rate value. When the control valve 11 is controlled, and the selector switch 101 is 2, that is, when the selector 101 is positioned to take the calculation output value of the calculator 1 102, the return air flow rate setting value is the air flow rate value and the blowing rate for the furnace pressure. The return air flow control value is determined by the air flow value with respect to the flow rate set value.

취입계통 이상발생시 고온,고압의 열풍이 역류를 방지하면서 긴급히 취입을 정지해야 하지만 미분탄 피드호퍼(20)측 조치는 배관내 미분탄에 의한 막힘을 방지하고 재취입작업을 원할하게 하기 위해 취입정지를 하기위해 퍼지작업이 우선되어야 한다.In case of abnormality in blown-out system, hot air of high temperature and high pressure should stop the blown urgently, but the action of pulverized coal feed hopper (20) side stops blown to prevent clogging caused by pulverized coal in the pipe and to make re-blowing work smooth. Purge action should be a priority.

따라서 퍼지작업은 취입변1(21)과 취입변2(22)을 닫아 피더호퍼(20)에서 취입배관(32)으로 미분탄이 유입되는 것을 중지시킨다. 이후, 취입정지를 하게되는데 이 경우는 퍼지유량조절변(11)이 닫히는데 따른 고로압력이 취입배관(32) 및 랜스로 역류하는 것을 방지하기 위해 랜스A변(33)을 반드시 먼저 닫고 취입정지를 실시하여야 한다.Therefore, the purging operation closes the blowing side 1 (21) and the blowing side 2 (22) to stop the pulverized coal flows from the feeder hopper 20 into the blowing pipe (32). Thereafter, the blow stop is performed. In this case, the lance A side 33 must be closed first and the blow stop must be prevented to prevent the blast furnace pressure from flowing back into the blow pipe 32 and the lance. Should be implemented.

또, 정기수리 또는 계획휴지 등에 따른 고로휴지시 취입랜스(36)에 퍼지작업으로 휴풍을 시작하게 되는데, 휴풍시 노내압력의 감소분만큼 퍼지공기유량이 비례적으로 감소하게 되며, 휴풍완료시 노내압력이 0이 되어 퍼지공기는 노내부로 계속방출되게 된다. 이때 취입정지작업으로 배관내 압력을 유지하던 퍼지유량조절변(11)이 닫히면서 유량은 0이 되고 취입배관의 압력도 0이 된다.In addition, when the blast furnace is stopped due to regular repair or planned stop, etc., the air is started by purging operation, and the purge air flow rate is proportionally reduced by the decrease of the internal pressure when the air is closed. This zero makes purge air continue to be discharged into the furnace. At this time, the purge flow control valve 11, which maintains the pressure in the pipe by the stop operation, is closed, and the flow rate becomes zero, and the pressure in the blow pipe becomes zero.

이 상태에서 작업표준서에 정의된 취입랜스(36), 플렉시블호스(35)의 교환 및 풍구교환등 고로측 작업은 안전을 위해 취입 랜스A변(33)과 랜스B변(34)을 닫고 수행한다. 이후 재송풍시 송풍과 동시에 노내압력이 증가하므로 미분탄 취입설비의 취입배관(32)으로 역류를 방지하기 위해 퍼지작업으로 반송공기를 공급한다.In this state, the blast furnace side work such as replacement of blow lance 36, flexible hose 35, and blowhole exchange defined in the work standard is performed after closing blow lance A 33 and lance B 34 for safety. . Since the internal pressure increases at the same time as the air blowing at the time of retransmission, the conveying air is supplied by purging to prevent backflow to the blowing pipe 32 of the pulverized coal injection facility.

이러한 방법은 렌스A,B변(33,34)이 고로 원주방향으로 설치된 블로우배관(61)전체에 설치되어 있어 수동밸브를 열고 닫는 동안 계속 공급되는 퍼지용 반송공기가 취입배관(32)에 충만하게 되는데, 이 압력은 취입배관(32)의 내부압력을 급격히 상승시켜 플렉시블호스(35), 취입배관(32), 렌스A,B변(33,34)의 파열, 폭발, 노내압력의 외부유출에 따른 대형설비사고를 초래할 수 있다.In this method, the lance A and B sides 33 and 34 are installed in the entire blow pipe 61 installed in the circumferential direction of the blast furnace so that the purge conveying air which is continuously supplied while the manual valve is opened and closed is filled in the blown pipe 32. This pressure rapidly raises the internal pressure of the blown pipe (32), causing the flexible hose (35), blown pipe (32), lances A, B sides (33, 34) to burst, explode, and outflow of the furnace pressure. This can lead to large equipment accidents.

본 발명의 목적은 상기와 같은 종래의 제반 문제점을 해소하기 위한 것으로서 미분탄 취입설비 분배기압력 즉 취입배관내의 압력을 고로의 노내압력보다 일정한 차(1.5Kg/㎠)로 유지시켜 비정상적인 요인에 의한 급격한 압력상승을 방지함으로써 대형설비사고를 예방할 수 있게 되는 미분탄 취입설비 분배기 압력제어장치를 제공하는데 있다.An object of the present invention is to solve the above-mentioned conventional problems, the pressure of the pulverized coal blowing facility distributor pressure, that is, the pressure in the blow pipe is maintained at a constant difference (1.5Kg / ㎠) than the furnace pressure of the blast furnace, the sudden pressure caused by abnormal factors It is to provide a pulverized coal blowing equipment distributor pressure control device that can prevent a large equipment accident by preventing the rise.

도 1은 종래의 미분탄 취입설비의 압력제어장치의 전체 블록구성도이다.1 is an overall block diagram of a pressure control device of a conventional pulverized coal injection facility.

도 2는 도 1의 퍼지제어 부분에 대한 상세 블록구성도이다.FIG. 2 is a detailed block diagram illustrating the fuzzy control part of FIG. 1.

도 3은 본 발명에 따른 미분탄 취입설비의 압력제어장치의 전체 블록구성도이다.3 is an overall block diagram of a pressure control device of the pulverized coal injection facility according to the present invention.

도 4는 본 발명의 퍼지제어 부분에 대한 상세 블록구성도이다.4 is a detailed block diagram of a fuzzy control part of the present invention.

※ 도면의 주요부분에 대한 부호의 설명 ※※ Explanation of code about main part of drawing ※

10 : 퍼지유량 발신기 11 : 퍼지유량조절변10: fuzzy flow transmitter 11: fuzzy flow control valve

12 : 반송공기관 20 : 피드호퍼12: return air engine 20: feed hopper

21 : 취입변1 22 : 취입변221: Blown edge 1 22: Blown edge 2

23 : 픽업 30 : 분배기23: pickup 30: splitter

31 : 삼방변 32 : 취입배관31: three-way side 32: blown piping

33 : 렌스A변 34 : 렌스B변33: Lens A side 34: Lens B side

35 : 플렉시블호스 36 : 취입렌스35: flexible hose 36: blown lance

40 : 렌스퍼지유량 발신기 41 : 렌스퍼지유량 조절변40: lance purge flow transmitter 41: lance purge flow control valve

50 : 노내압 발신기 60 : 고로50: pressure transmitter 60: blast furnace

61 : 블로우배관 70 : 압력조절변61: blow pipe 70: pressure control valve

71 : 압력차단변 72 : 분배기 압력 발신기71: pressure cutoff 72: distributor pressure transmitter

80 : 압력배출관 100 : 퍼지유량조절계80: pressure discharge pipe 100: purge flow control system

101 : 선택스위치 102 : 연산기1101: selection switch 102: calculator 1

103 : 비율기1 104 : 취입량 설정기103: proportioner 1 104: blowing amount setter

110 : 렌스퍼지 유량조절계 111 : 연산기2110: lance purge flow controller 111: calculator 2

120 : 노내압지시계 121 : 비율기2120: internal pressure indicator 121: ratio 2

200 : 분배기 압력조절계 201 : 비율기3200: distributor pressure regulator 201: proportioner 3

상기 목적을 달성하기 위한 본 발명은 미분탄 취입설비에서의 분배기 압력제어를 위해, 취입배관의 압력을 노내압력보다 높은 상태를 유지하면서 정상취입중 비정상적인 요인에 의한 압력의 급상승을 방지하기 위해, 반송공기유량의 연산에 의한 퍼지시 미분탄 취입변 온 중에는 압력차단변이 클로즈되도록 하고, 취입변의 취입정지나 퍼지작업시에는 상기 압력차단변이 오픈되도록 하며, 이후 취입배관내에 압력 상승으로 분배기압력이 상승하면 분배기 압력발신기에서 이를 검출하여 분배기 압력조절계에 압력상승 신호로 제공되게 하고 상기 압력조절계에서는 노압발신기에 의한 노압지시계의 노압신호가 비율기3에서 처리되어 출력되는 노내압+1.5 이상의 설정값과 상기 분배기 압력이 비교되어 출력되게 하고, 상기 압력조절계의 출력으로 백 필터 배관라인에 설치된 압력조절변의 개도가 제어되게 구성하는 것을 특징으로 한다.The present invention for achieving the above object is to control the distributor pressure in the pulverized coal injection facility, in order to prevent the sudden rise of pressure due to abnormal factors during normal blowing while maintaining the pressure of the injection pipe higher than the pressure in the furnace, conveying air When the pulverized coal blown-up valve is purged by calculation of the flow rate, the pressure cut-off side is closed while the blow-off stop or purge operation of the blown-off valve is opened. Then, when the distributor pressure rises due to the pressure rise in the blown pipe, the distributor pressure The transmitter detects this and provides the pressure increase signal to the distributor pressure controller. In the pressure controller, the pressure signal of the pressure monitor of the pressure transmitter is processed and output from the ratio 3, and the distributor pressure equal to or higher than 1.5. Are compared and output, and backfill to the output of the pressure regulator. Characterized in that the opening degree of the pressure control valve installed in the pipe line is controlled to be controlled.

첨부한 도면을 참고로 하여 본 발명을 설명하면 다음과 같다.Hereinafter, the present invention will be described with reference to the accompanying drawings.

도 3은 본 발명 장치의 블록구성도이다. 여기에서 참고되는 바와 같이, 피드호퍼(20)내의 미분탄은 각각 직렬의 취입변1,2(21,22)을 거쳐 픽업(23)으로 자체압력에 의해 이송되게 구성한다.3 is a block diagram of an apparatus of the present invention. As referred to herein, the pulverized coal in the feed hopper 20 is configured to be conveyed by its own pressure to the pickup 23 via the blowing valves 1, 2 (21, 22) in series, respectively.

상기 픽업(23)에는 퍼지유량조절변(11)을 통한 반송공기가 반송공기관(12)을 통하여 투입되게 구성하여 이 반송공기에 의해 미분탄이 압력 분배기(30)로 이송되게 구성한다. 분배기(30)내의 초과 압력은 압력조절변(70)과 압력차단변(71)을 통하여 백필터로 이송되게 구성하고, 이 분배기에서 분배된 압력은 3방변(31)과 취입배관(32)을 거쳐 고로(60)로 취입되게 구성한다.The pick-up 23 is configured such that the conveying air through the purge flow control valve 11 is introduced through the conveying air engine 12 so that the pulverized coal is conveyed to the pressure distributor 30 by the conveying air. The excess pressure in the distributor 30 is configured to be transferred to the bag filter through the pressure regulating valve 70 and the pressure blocking side 71, and the pressure distributed in the distributor divides the three-way valve 31 and the blown pipe 32. It is configured to be blown into the blast furnace 60 through.

또한 반송공기는 지관과 랜스퍼지유량조절변(41)을 통해 상기 3방변(31)중하나의 변을 통해 공급되게 구성한다.In addition, the conveying air is configured to be supplied through one of the three sides 31 through the branch pipe and the lance purge flow control valve (41).

상기 반송공기의 압력은 퍼지유량발신기(10)에 의해 검지되어 퍼지유량조절계(100)로 제공되게 구성한다.The pressure of the conveying air is detected by the purge flow transmitter 10 is configured to be provided to the purge flow control system (100).

반송공기의 지관에 설치된 랜스퍼지유량발신기(40)의 검지신호는 랜스퍼지 유량조절계(110)로 제공되게 구성한다.The detection signal of the lance purge flow rate transmitter 40 installed in the branch pipe of the conveying air is configured to be provided to the lance purge flow rate controller 110.

노내압발신기(50)에서 검지된 노내압신호는 노내압지시계(120)로 제공되게 구성한다.The furnace pressure signal detected by the furnace pressure transmitter 50 is configured to be provided to the furnace pressure gauge 120.

상기 노내압 지시계(120)를 거친 노내압신호는 비율기2(121)를 거쳐 연산기1(102)에 입력되게 구성하고, 취입량설정기(104)에서 생성된 값은 비율기1(103)를 거쳐 상기 연산기1(102)에 입력되게 구성한다.The furnace pressure signal passing through the furnace pressure indicator 120 is configured to be input to the calculator 1 (102) through the ratio 2 (121), and the value generated by the blow amount setter (104) is the ratio 1 (103). It is configured to be input to the calculator 1 (102) through.

이 연산기1(102)에서 출력되는 값은 선택스위치(101)의 하나의 입력단으로 입력되게 구성한다. 또한 이 선택스위치(101)의 다른 입력단에는 연산기2(111)의 연산값이 입력되게 구성한다. 상기 연산기2(111)에는 랜스퍼지 유량조절계(110)의 유량조절값이 입력되게 구성하고 또한 상기 유량조절계(110)의 유량조절 출력 값은 반송공기 지관에 설치된 랜스퍼지 유량조절변(41)의 제어신호로 제공되게 구성한다.The value output from the calculator 1 102 is configured to be input to one input terminal of the selection switch 101. Further, the calculation value of the calculator 2 111 is input to the other input terminal of the selection switch 101. The calculator 2 (111) is configured such that the flow rate adjustment value of the lance purge flow rate controller 110 is input, and the flow rate output value of the flow rate gauge 110 is determined by the flow rate of the lance purge flow rate adjustment valve 41 installed in the conveying air branch pipe. It is configured to be provided as a control signal.

상기 선택 스위치(101)에 의해 선택된 연산기1(102) 또는 연산기2(111)중 어느 하나의 출력값은 유량조절계(100)에 제공되어 상기 퍼지유량발신기(10) 값을 조절하게 하여 그 조절된 값으로 퍼지유량조절변(11)이 제어되게 구성한다.The output value of any one of the operator 1 102 or the operator 2 111 selected by the selection switch 101 is provided to the flow controller 100 to adjust the value of the purge flow transmitter 10 so as to adjust the adjusted value. The purge flow control valve 11 is configured to be controlled.

한편, 노내압 지시계(120)의 압력검출값은 비율기3(201)를 거쳐 분배기 압력조절계(200)로 제공되게 구성하고 또한 이 압력조절계(200)에는 분배기(30)에 설치된 분배기 압력발신기(72)의 압력 값이 입력되게 구성한다.On the other hand, the pressure detection value of the furnace internal pressure indicator 120 is configured to be provided to the distributor pressure regulator 200 through the proportioner 3 (201), and the pressure regulator 200 has a distributor pressure transmitter (installed in the distributor 30). The pressure value of 72) is input.

상기 압력조절계(200)에서 조절된 압력 값으로 상기 압력조절변(70)이 제어되게 구성한다.The pressure control valve 70 is configured to be controlled by the pressure value adjusted by the pressure control system 200.

도 4는 본 발명의 퍼지제어부분에 대한 상세 블록구성도로서, 유량조절계(100)와 압력조절계(200)에서의 연산 및 그 제어출력 과정을 설명하고 있다.4 is a detailed block diagram of the fuzzy control part of the present invention, which describes the calculation and the control output process of the flow controller 100 and the pressure regulator 200.

이와 같이 구성된 본 발명 장치의 작동과정을 설명하면 다음과 같다.Referring to the operation of the present invention configured as described above is as follows.

먼저, 피드호퍼(20)내의 미분탄은 각 취입변1,2(21,22)의 개도에 따라 픽업(23)으로 이송된다.First, the pulverized coal in the feed hopper 20 is transferred to the pickup 23 according to the opening degree of each blowing edge 1, 2 (21, 22).

픽업(23)에는 퍼지유량조절변(11)을 통한 반송공기가 반송공기관(12)을 통하여 투입되므로 미분탄이 압력 분배기(30)로 이송된다. 이 압력 분배기(30)내의 초과 압력은 압력조절변(70)과 압력차단변(71)을 통하여 백필터로 빠져나가게 되므로 적정화된 압력으로 미분탄이 3방변(31)과 취입배관(32)을 통해 고로(60)내로 취입된다.Since the conveying air through the purge flow control valve 11 is introduced into the pickup 23 through the conveying air engine 12, the pulverized coal is conveyed to the pressure distributor 30. Since the excess pressure in the pressure distributor 30 exits the bag filter through the pressure control valve 70 and the pressure blocking valve 71, the fine coal is passed through the three-way valve 31 and the blown pipe 32 at an appropriate pressure. Blown into the blast furnace 60.

취입변1,2(21,22)의 오픈을 통한 미분탄 취입작업 중에는 반송공기유량(퍼지유량)이 연산되어 퍼지되므로 이때에 압력차단변(71)은 클로즈되고 취입변1,2의 작동오프에 따른 취입정지나 퍼지작업시에는 상기 압력차단변(71)은 오픈된다.During the pulverized coal blowing operation by opening the blowing valves 1 and 2 (21 and 22), the return air flow rate (purge flow rate) is calculated and purged. At this time, the pressure shutoff valve 71 is closed and the operation off of the blowing valves 1 and 2 is performed. The pressure cut-off side 71 is opened at the time of blow stop or purge operation.

취입배관(32)내에 압력이 상승하여 분배기(30)의 압력이 상승되면 분배기압력발신기(72)는 이를 검출하여 압력조절계(200)로 발신한다. 이 압력조절계(200)에는 노내압 지시계(120)로부터 제공되는 고로내압 검출 값에 기초하여 비율기3(201)내에서 배율조정을 통하여 노내압+1.5의 압력치가 출력되게 되므로 이 값과 분배기의 검출압력 값을 비교 조절하는 것으로 압력조절변(70)의 개도 조절을 통한 압력조절이 이루어지게 된다.When the pressure rises in the blown pipe 32 and the pressure of the distributor 30 rises, the distributor pressure transmitter 72 detects this and transmits it to the pressure regulator 200. The pressure regulator 200 outputs the pressure value of the furnace pressure +1.5 through the scaling in the proportioner 3 201 based on the blast furnace pressure detection value provided from the furnace pressure indicator 120. By comparatively adjusting the detected pressure value, the pressure is adjusted by adjusting the opening degree of the pressure regulating valve 70.

상기 반송공기의 압력은 퍼지유량발신기(10)에 의해 검지되어 퍼지유량조절계(100)로 제공되고, 반송공기의 지관에 설치된 랜스퍼지유량발신기(40)에 의해서는 그 지관을 통해 공급되는 퍼지유량이 검출되어 랜스퍼지 유량조절계(110)로 제공되며, 노내압발신기(50)에서 검지된 노내압신호는 노내압지시계(120)로 제공된다.The pressure of the conveying air is detected by the purge flow transmitter 10 and provided to the purge flow control system 100, and the purge flow rate supplied through the branch pipe by the lance purge flow transmitter 40 installed in the branch pipe of the conveying air. This detection is provided to the lance purge flow controller 110, the furnace pressure signal detected by the furnace pressure transmitter 50 is provided to the furnace pressure monitor 120.

상기 노내압검출신호는 노내압 지시계(120)와 비율기2 그리고 I/V변환후에 비율기3(121,201)를 거쳐 각각 연산기1(102)와 분배기 압력조절계(200)로 제공된다.The furnace pressure detection signal is provided to the calculator 1 (102) and the distributor pressure regulator (200) through the furnace pressure indicator (120), the ratio 2, and the ratios 3 (121, 201) after the I / V conversion.

취입량 설정기(104)의 취입량 설정치는 비율기1(103)를 통해 상기 연산기1(102)로 제공되어 연산처리된 후, 연산기2(111)의 입력값과 선택스위치(101)의 입력값으로 그 연산값이 제공된다.The blow amount set value of the blow amount setter 104 is provided to the calculator 1 102 through the proportioner 1 103 to be processed, and then the input value of the calculator 2 111 and the input of the selection switch 101 are applied. The value is provided as its operation value.

상기 유량조절계(110)로부터 입력되는 유량조절 값과 상기 연산기1(102)의 연산출력값을 받아 다시 연산처리하는 상기 연산기2(111)의 연산 출력값도 상기 선택스위치(101)에 다른 하나의 입력으로 제공된다.The arithmetic output value of the arithmetic operator 2 (111), which receives a flow control value input from the flow controller 110 and the arithmetic output value of the arithmetic operator 1 (102), and performs arithmetic processing again, is another input to the selection switch 101. Is provided.

상기 선택스위치(101)에 의해 선택된 연산기1(102) 또는 연산기2(111)의 연산출력값은 유량조절계(100)로 선택적으로 제공되어 상기 퍼지유량조절변브(11)의 개도값이 적정수준으로 조절된다.The operation output value of the operator 1 102 or the operator 2 111 selected by the selection switch 101 is selectively provided to the flow controller 100 so that the opening value of the purge flow control valve 11 is adjusted to an appropriate level. do.

이상에서 설명한 바와 같은 본 발명은 미분탄 취입설비 분배기압력 즉 취입배관내의 압력을 고로의 노내압력보다 일정한 차로 유지시켜 비정상적인 요인에 의한 급격한 압력상승시 이를 신속하게 감지하여 백 필터를 과압력 부분을 외부로 배출시킴으로써 대형설비사고를 예방할 수 있는 특유의 효과를 가져온다.As described above, the present invention maintains the pressure in the pulverized coal injection facility distributor, that is, the pressure in the blown pipe at a constant difference from the furnace pressure of the blast furnace, so as to quickly detect the sudden increase in pressure due to an abnormal factor, thereby causing the bag filter to move to the outside of the overpressure part. By discharging, it has the unique effect of preventing the accident of large equipment.

또한 본 발명은 고로조업중 고로에 안정적으로 미분탄을 공급할 수 있어 생산량의 안정화와 안전 재해방지 효과를 기대할 수 있다.In addition, the present invention can provide a stable pulverized coal to the blast furnace during the operation of the blast furnace can be expected to stabilize the production and safety disaster prevention effect.

Claims (1)

미분탄 취입설비에서의 분배기 압력제어에 있어서, 취입배관의 압력을 노내압력보다 높은 상태를 유지하면서 정상취입중 비정상적인 요인에 의한 압력의 급상승을 방지하기 위해, 반송공기유량의 연산에 의한 퍼지시 미분탄 취입변 온 중에는 압력차단변(71)이 클로즈되도록 하고, 취입변의 취입정지나 퍼지작업시에는 상기 압력차단변(71)이 오픈되도록 하며, 이후 취입배관(32)내에 압력 상승으로 분배기압력이 상승하면 분배기 압력발신기(72)에서 이를 검출하여 분배기 압력조절계(200)에 압력상승 신호로 제공되게 하고 상기 압력조절계(200)에서는 노압발신기(50)에 의한 노압지시계의 노압신호가 비율기3(201)에서 처리되어 출력되는 노내압+1.5 이상의 설정값과 상기 분배기 압력이 비교되어 출력되게 하고, 상기 압력조절게의 출력으로 백 필터 배관라인에 설치된 압력조절변(70)의 개도가 제어되게 구성하는 것을 특징으로 하는 미분탄 취입설비 분배기 압력제어장치.In the distributor pressure control in the pulverized coal injection facility, the pulverized coal injection is carried out by the calculation of the return air flow rate in order to prevent the sudden rise of the pressure due to abnormal factors during the normal injection while maintaining the pressure in the blown pipe higher than the internal pressure. The pressure shutoff side 71 is closed during the change in temperature, and the pressure shutoff side 71 is opened during the stop or purging of the blown side. Then, when the distributor pressure rises due to the pressure rise in the blown pipe 32, The distributor pressure transmitter 72 detects this and provides the pressure increase signal to the distributor pressure control system 200. In the pressure control system 200, the pressure signal of the pressure monitor by the pressure transmitter 50 is a ratio 3 (201). Furnace pressure + 1.5 or more of the set value which is processed and outputted are compared with the distributor pressure and outputted, and the output of the pressure regulator is called a bag filter piping. Pulverized coal injection facility distributor pressure control device, characterized in that configured to control the opening degree of the pressure control valve (70) installed in the phosphorus.
KR10-2000-0036554A 2000-06-29 2000-06-29 Pressure control apparatus for distributor in a fine coal blowing equipment KR100432159B1 (en)

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KR100432159B1 true KR100432159B1 (en) 2004-05-20

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CN103451337A (en) * 2013-08-13 2013-12-18 宝钢集团新疆八一钢铁有限公司 Method for balancing resistance loss of double-distributor pipeline

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KR100461556B1 (en) * 2000-10-31 2004-12-14 주식회사 포스코 Pressure control device of Blast Furnace Hot Stove
KR100460659B1 (en) * 2000-12-21 2004-12-09 주식회사 포스코 a control system for furge and re-injection process on transport pipe of pulverized coal injection equipment malfuctioning
KR100843837B1 (en) * 2006-12-22 2008-07-03 주식회사 포스코 Apparatus for controlling input of fine coal using air density
KR100834055B1 (en) * 2007-06-08 2008-06-02 한국서부발전 주식회사 A method for the stable internal pressure of furnace in burning controller of 500mw boiler
CN114369692B (en) * 2022-01-12 2023-07-04 新疆八一钢铁股份有限公司 Blast furnace injection gas control system and control method
CN115155196B (en) * 2022-06-29 2023-06-13 广东众大智能科技有限公司 Multi-channel negative pressure continuous feeding machine

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JPS617138A (en) * 1984-06-22 1986-01-13 Nippon Steel Corp Distribution controller for fine pulverulent body
US5123632A (en) * 1989-02-14 1992-06-23 Paul Wurth S.A. Method for the pneumatic injection of metered quantities of powdered substances into a chamber at a variable pressure
JPH06336602A (en) * 1993-05-28 1994-12-06 Kawasaki Steel Corp Method for controlling carry of powdery and granular material
JPH1018907A (en) * 1996-06-28 1998-01-20 Nissan Motor Co Ltd Cylinder head for direct injection type diesel engine, and casting die for the same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103451337A (en) * 2013-08-13 2013-12-18 宝钢集团新疆八一钢铁有限公司 Method for balancing resistance loss of double-distributor pipeline

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