KR100971983B1 - Apparatus for controlling the pressure of feed hopper to prevent vent valve from being wearing, and controlling method the same - Google Patents

Apparatus for controlling the pressure of feed hopper to prevent vent valve from being wearing, and controlling method the same Download PDF

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KR100971983B1
KR100971983B1 KR1020030049346A KR20030049346A KR100971983B1 KR 100971983 B1 KR100971983 B1 KR 100971983B1 KR 1020030049346 A KR1020030049346 A KR 1020030049346A KR 20030049346 A KR20030049346 A KR 20030049346A KR 100971983 B1 KR100971983 B1 KR 100971983B1
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pressure
control valve
pressure control
hopper
pulverized coal
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KR1020030049346A
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KR20050009587A (en
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조진래
강병광
이승호
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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
    • C21B5/00Making pig-iron in the blast furnace
    • C21B5/001Injecting additional fuel or reducing agents
    • C21B5/003Injection of pulverulent coal
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21BMANUFACTURE OF IRON OR STEEL
    • C21B7/00Blast furnaces
    • C21B7/18Bell-and-hopper arrangements

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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)
  • Manufacture Of Iron (AREA)

Abstract

본 발명은 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치 및 제어방법에 관한 것으로서, 피드호퍼(40)의 충진변(41) 및 배압제어변(103)을 완전 개방하고, 가압 제어변(102)를 폐쇄시키고, 유동제어변(111)을 개방하여 미분탄 저장조(30)로부터 미분탄을 피드호퍼(40)로 충진한 다음; 상기 배압제어변(103)을 완전 폐쇄시키고, 가압제어변(102)를 개방하고, 유동제어변(111)을 계속 개방하여 1차 가압하고; 상기 배압제어변(103)을 계속 폐쇄시키고, 가압제어변(102)을 다시 폐쇄시키고, 유동제어변(111)을 개방하여 유동질소로 가압한 다음; 상기 배압제어변(103)을 계속 폐쇄시키고, 가압제어변(102)을 개방시키고, 유동제어변(111)을 계속 개방하여 2차 가압하여 상기 배압제어변(103) 및 가압제어변(102)을 개방시키고 유동제어변 (111)을 계속 개방하여 고로풍구(60)로 미분탄을 취입시키고; 상기 배압제어변(103)을 개방시키고, 가압제어변(102)을 다시 폐쇄시키고, 유동제어변(111)을 개방하여 배압하는 것으로 구성되는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치 및 그 제어방법을 제공한다.The present invention relates to a hopper pressure control device and a control method for preventing wear of the back pressure control valve in the pulverized coal injection facility, and fully open the filling valve 41 and the back pressure control valve 103 of the feed hopper 40 and pressurizing the control valve ( 102 is closed, and the flow control valve 111 is opened to fill the pulverized coal with the feed hopper 40 from the pulverized coal storage tank 30; Completely closing the back pressure control valve (103), opening the pressure control valve (102), and continuously opening the flow control valve (111) to pressurize firstly; Continuously closing the back pressure control valve 103, closing the pressure control valve 102 again, and opening the flow control valve 111 to pressurize with flow nitrogen; The back pressure control valve 103 continues to be closed, the pressure control valve 102 is opened, the flow control valve 111 is continuously opened, and the secondary pressure is applied to the back pressure control valve 103 and the pressure control valve 102. Open the flow control valve 111 and continue to blow the pulverized coal into the blast furnace vent 60; Hopper for preventing the wear of the back pressure control valve in the pulverized coal injection facility, characterized in that the back pressure control valve 103 is opened, the pressure control valve 102 is closed again, and the flow control valve 111 is opened. Provided is a pressure control device and a control method thereof.

미분탄취입설비, 피드호퍼, 배압제어변, 2단가압, 2차가압Pulverized coal injection equipment, feed hopper, back pressure control valve, two stage pressure, secondary pressure

Description

미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치 및 제어방법{APPARATUS FOR CONTROLLING THE PRESSURE OF FEED HOPPER TO PREVENT VENT VALVE FROM BEING WEARING, AND CONTROLLING METHOD THE SAME}Hopper pressure control device and control method for back pressure control valve wear prevention in pulverized coal injection facility {APPARATUS FOR CONTROLLING THE PRESSURE OF FEED HOPPER TO PREVENT VENT VALVE FROM BEING WEARING, AND CONTROLLING METHOD THE SAME}

도 1은 종래의 피시아이 설비의 가압 제어 구성도1 is a pressure control configuration diagram of a conventional fisheye facility

도 2는 종래의 피드 호퍼 취입 시퀀스 상태별 제어변 및 압력 변화표Figure 2 is a control valve and pressure change table according to the state of the conventional feed hopper blowing sequence

도 3은 종래의 피드 호퍼 가압 제어 흐름도 3 is a flow chart of a conventional feed hopper pressurization control

도 4는 본 발명에 따른 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법의 피드호퍼 가압제어 장치구성도;Figure 4 is a configuration diagram of the feed hopper pressure control device of the hopper pressure control method for preventing back pressure control valve wear in the pulverized coal injection facility according to the present invention;

도 5는 본 발명에 따른 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법의 피드호퍼 취입시퀀스 상태별 제어변 및 압력 변화표;5 is a control valve and pressure change table for each feed hopper blowing sequence state of the hopper pressure control method for preventing back pressure control valve wear in the pulverized coal injection facility according to the present invention;

도 6은 본 발명에 따른 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법의 2단가압 제어판별 흐름도;Figure 6 is a flow chart according to the two-stage pressure control panel of the hopper pressure control method for preventing back pressure control valve wear in the pulverized coal injection facility according to the present invention;

도 7은 본 발명에 따른 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법의 2단가압 조건판별도;7 is a two-stage pressure condition discrimination diagram of the hopper pressure control method for preventing back pressure control valve wear in the pulverized coal injection facility according to the present invention;

도 8은 본 발명에 따른 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법의 2차가압 조건판별도;8 is a secondary pressure condition discrimination diagram of the hopper pressure control method for preventing back pressure control valve wear in the pulverized coal injection facility according to the present invention;

도 9는 본 발명에 따른 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압 력 제어방법의 취입량별 2차압력제어 설정비율표이다.9 is a table of the secondary pressure control setting ratio according to the blowing amount of the hopper pressure control method for preventing wear of the back pressure control valve in the pulverized coal injection facility according to the present invention.

♠도면의 주요부분에 대한 부호의 설명 ♠♠ Explanation of symbols for the main parts of the drawing ♠

30:미분탄 저장조 40:피드 호퍼 100:피드호퍼 압력조절계30: pulverized coal storage tank 40: feed hopper 100: feed hopper pressure regulator

101:호퍼 압력조절계 설정신호 선택기 110: 유동 질소 유량 조절계101: Hopper pressure controller setting signal selector 110: flow nitrogen flow controller

200: 피드호퍼 운전모드 선택기 210: 피드호퍼 시퀀스 처리부200: feed hopper operation mode selector 210: feed hopper sequence processing unit

300: 측정신호 처리부 400:2단 가압조건 처리부300: measurement signal processor 400: two-stage pressure condition processor

420:2차가압 조건 처리부 411: 1차가압 비율기420: secondary pressure condition processing unit 411: primary pressure ratio

412:2차가압 비율기 430 :2단 가압 조건 신호 선택기412: Secondary pressure ratio 430: Two-stage pressure condition signal selector

본 발명은 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치 및 제어방법에 관한 것으로 보다 상세하게는, PCI(Pulverized Coal Injection) 취입 설비에서 피드호퍼가 충진→가압→대기→취입→배압의 상태로 공정이 진행되는 과정에서 피드호퍼 가압제어상의 문제점으로 피드호퍼(40)의 압력제어 장치 중 배압 제어변의 마모를 줄여 취입량 제어의 안정화를 도모하기 위한 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치 및 제어방법에 관한 것이다.The present invention relates to a hopper pressure control device and a control method for preventing wear of a back pressure control valve in a pulverized coal injection facility, and more specifically, a feed hopper is charged → pressurized → atmospheric → blown → back pressure in a PCI (Pulverized Coal Injection) injection facility. Hopper pressure for preventing wear of back pressure control valve in pulverized coal injection equipment to reduce the wear of back pressure control valve in the pressure control device of feed hopper 40 as a problem in feed hopper pressurization control during the process It relates to a control device and a control method.

도 1에 도시된 바와 같이, PCI(Pulverized Coal Injection) 설비는 분쇄기(10)에서 파쇄된 미분탄이 저장조(30)에서 피드호퍼(40)에 충진되면, 피드호퍼(40)에는 일정 압력의 질소를 인가하여 피드호퍼(40) 하부에서부터 고로(70)의 풍구(60)까지 연결된 배관을 통해 압송하여 취입을 하게 된다.As shown in FIG. 1, in the Pulverized Coal Injection (PCI) facility, when the pulverized coal pulverized in the grinder 10 is filled in the feed hopper 40 in the storage tank 30, the feed hopper 40 is supplied with nitrogen at a predetermined pressure. It is applied to the blown through the pipe connected from the lower portion of the feed hopper 40 to the tuyere 60 of the blast furnace 70 is blown.

이러한 과정에서 미분탄 압송을 위한 피드호퍼(40)의 안정적인 압력 유지가 매우 중요하며, 압력 유지를 위한 제어변으로 호퍼(40)에 질소를 가압하는 가압 제어변(102), 호퍼 내의 압력을 배압하기 위한 배압 제어변(103), 그리고 호퍼(40) 하부에 미분탄의 고착을 방지하여 취입과정에서 미분탄의 유동성을 향상시키기 위한 유동 제어변(111) 등이 설치되어 있으며, 이를 도면을 통해 설명하면 다음과 같다.In this process, it is very important to maintain a stable pressure of the feed hopper 40 for pulverized coal injection, and to control the pressure in the hopper 40 to pressurize nitrogen to the hopper 40 as a control valve for maintaining pressure. The back pressure control valve 103 and the flow control valve 111 for improving the flowability of the pulverized coal in the blowing process by preventing the pulverized coal from being fixed to the lower portion of the hopper 40 are described. Is the same as

도 1은 1개의 저장조(30)와 3개의 피드호퍼(40) 및 분배변(50)과 고로(70)의 풍구(60)까지 미분탄을 취입하기 위한 설비를 갖춘 미분탄 취입 설비의 피드 호퍼가압 제어구성도를 도시한 것이다.1 is a feed hopper pressurization control of a pulverized coal injection plant having a facility for blowing pulverized coal to one reservoir 30, three feed hoppers 40, and a distribution valve 50 and a blast furnace 60 of the blast furnace 70. The configuration diagram is shown.

이를 통해 피드호퍼(40)의 압력을 제어하는 과정을 설명하면, 저장조(30)와 피드호퍼(40) 사이에는 충진변(41)이 설치되어 있으며, 3개중 어느 하나의 피드호퍼(40)가 충진공정이 되면 저장조(30)의 미분탄이 충진공정인 피드 호퍼(40)로 충진이 진행되고, 피드호퍼(40) 중량 상한치에 도달하게 되면 충진변(41)은 닫히고, 그와 동시에 충진은 완료되며, 피드호퍼(40) 취입에 필요한 압력을 확보하기 위한 도 3의 흐름도에 의해 가압이 시작되게 되고, 호퍼(40)의 압력이 피드호퍼(40)의 설정압력(S.V)에 도달하게 되면 가압은 종료되어 대기 모드(Mode)로 되고,Referring to the process of controlling the pressure of the feed hopper 40 through this, the filling side 41 is installed between the reservoir 30 and the feed hopper 40, any one of three feed hopper 40 is When the filling process is performed, the fine coal of the storage tank 30 is filled with the feed hopper 40 which is the filling process, and when the upper limit of the weight of the feed hopper 40 is reached, the filling side 41 is closed, and at the same time the filling is completed. Pressurization is started by the flowchart of FIG. 3 to secure the pressure necessary for the feed hopper 40 blowing, and pressurizes when the pressure of the hopper 40 reaches the set pressure SV of the feed hopper 40. Exits into standby mode,

전회의 피드호퍼(40) 취입이 완료되면 대기 중인 피드호퍼(40)의 취입변(42)이 열리고 호퍼 내부의 미분탄은 취입변(42)을 통해 고로의 풍구(60)까지 압송되게 된다. When blowing of the previous feed hopper 40 is completed, the blowing side 42 of the waiting feed hopper 40 is opened and the pulverized coal inside the hopper is pumped to the tuyere 60 of the blast furnace through the blowing side 42.                         

피드 호퍼(40)의 중량이 호퍼의 "공빈(Empty)" 설정값에 도달되면 취입은 종료되고 호퍼(40) 내부의 잔압은 배압 제어변(103)을 통해 배압되게 된다.When the weight of the feed hopper 40 reaches the "Empty" setting value of the hopper, blowing is terminated and the residual pressure inside the hopper 40 is back-pressured through the back pressure control valve 103.

또한 피드호퍼(40) 하부에는 미분탄의 호퍼 내부에서 서로 고착화 되는 것을 방지하기 위하여 유동성 질소가 미리 설정된 유량이 지속적으로 공급된다.In addition, the lower portion of the feed hopper 40 is continuously supplied with a predetermined flow rate of the flowable nitrogen to prevent from being fixed to each other in the hopper of pulverized coal.

도 2는 피드호퍼(40)의 모드(Mode)상태에 따라 밸브 및 압력변화 상태를 나타내고 있다.2 shows a valve and a pressure change state according to the mode of the feed hopper 40.

도 2에 도시된 바와 같이, 가압이 완료된 후 대기상태에서 미분탄 고착으로 인한 미분탄 유동성 저하를 방지하기 위하여 공급되는 유동성 질소로 호퍼(40)의 압력이 상승되고, 이에 따른 압력을 제어하기 위하여 배압 제어변(103)은 압력 조절계(100)의 출력신호의 크기만큼 열려 계속 제어를 하게 되는데, 이 시간 동안 미분탄과 고압의 기체가 혼합되어 고속으로 제어변(103)을 통과하게 되어 제어변(103) 내부의 볼(Ball)과 시트 링(Seat Ring)이 잦은 마모가 발생하며, 제어변(103)의 볼과 시트 링의 마모가 발생되면 제어변(103)의 제어특성 저하 및 제어변(103) 전폐기능이 상실되어 호퍼의 압력이 일정하게 유지 되지 않고 이로 인하여 발생하는 취입량의 제어 불량이 발생하게 된다.As shown in FIG. 2, after the pressurization is completed, the pressure of the hopper 40 is increased with the flowable nitrogen supplied to prevent the pulverized coal fluidity deterioration due to the coal dust sticking in the atmospheric state, and the back pressure control to control the pressure accordingly. The side 103 is open as much as the output signal of the pressure regulator 100 to continue to control, during this time the pulverized coal and high-pressure gas is mixed to pass through the control valve 103 at a high speed control valve 103 Frequent wear of the ball and the seat ring occurs inside, and wear and tear of the ball and the seat ring of the control valve 103 decreases the control characteristics of the control valve 103 and the control valve 103. The closing function is lost, and the pressure of the hopper is not kept constant, resulting in a poor control of the blown amount.

상기 제어변(103)의 고체 및 기체 2상류인 미분 및 질소에 의한 밸브 마모강도에 대하여 설명하면 다음과 같다.Referring to the valve wear strength due to the fine powder and nitrogen in the solid and gas two-phase flow of the control valve 103 as follows.

피드호퍼(40) 내에 충진된 고체 및 기체 2상류인 미분 및 질소가 밸브를 통하여 배출되는 순간 미분에 의하여 밸브 볼 및 시트 링에 가하는 충격은 운동에너지에 비례하고 있다(수학식 1). The impact applied to the valve ball and the seat ring by the minute powder when the fine powder and the solid nitrogen filled in the feed hopper 40 is discharged through the valve is proportional to the kinetic energy (Equation 1).                         

즉, 2배 빠른 미분의 배출속도는 제곱에 비례하여 4배의 충격(마모)을 주게된다.In other words, the discharge speed of the derivative twice as fast gives four times the impact (wear) in proportion to the square.

운동에너지(KE) = 1/2×M×V²= FdKinetic energy (KE) = 1/2 × M × V² = Fd

이를 개선하기 위한 종래기술의 피드호퍼 압력제어방법(출원번호1999-31603)은 배압 제어변을 소(小)배압 제어변과 대(大)배압 제어변을 설치하여 각 밸브마다의 타임 스케쥴을 개발하고, 밸브의 동작특성을 이용하여 일정한 시간내에 밴트되는 유량이 일정하도록 제어 알고리즘을 개발, 적용하여 배압 제어시간 내에 발생되었던 밸브의 마모를 방지하도록 하였으나 다음과 같은 문제점이 있다.To improve this, the conventional feed hopper pressure control method (Application No. 1999-31603) installs a small back pressure control valve and a large back pressure control valve to develop a time schedule for each valve. In addition, the control algorithm was developed and applied so that the flow rate bent in a certain time by using the operation characteristics of the valve to prevent the wear of the valve generated in the back pressure control time, but there are the following problems.

첫째, 배압 제어변의 주마모 요인인 취입대기시간(피드호퍼의 압력을 취입 압력까지 가압 완료 상태가 된 시간)에 유동성 질소의 공급으로 호퍼의 압력이 상승하게 되며, 상승된 압력을 배출하여 일정 압력으로 유지하기 위하여 배압 제어변(103)은 적은 각도로 열린 상태에서 호퍼 압력을 제어하게 되며, 이 각도에서는 제어변(103)의 유속이 빠르게 되어 제어변(103)의 급격한 충격을 가하여 마모를 가져오는 문제점이 있다.First, the pressure of the hopper is increased by the supply of liquid nitrogen in the blowing waiting time (the time when the feed hopper pressure is fully pressurized to the blowing pressure), which is the main wear factor of the back pressure control valve, and the discharged pressure is discharged to constant pressure. In order to maintain the back pressure control valve 103 to control the hopper pressure in the open state at a small angle, at this angle, the flow velocity of the control valve 103 is increased to give a sharp impact on the control valve 103, causing wear There is a problem coming.

둘째, 배압 제어변(103)의 마모가 발생되면 피드호퍼 내의 질소와 미분탄이 백 필터(20)로 빠져 나가게 되고 이로 인하여 호퍼 내의 압력이 일정하게 유지되지 않는 문제점이 있다.Second, when abrasion of the back pressure control valve 103 occurs, nitrogen and pulverized coal in the feed hopper are discharged to the bag filter 20, which causes a problem that the pressure in the hopper is not kept constant.

셋째, 호퍼 내의 압력이 일정하게 유지되지 않으면 취입공정에서 일정한 취입량 제어가 불가능하게 되는 문제점이 있다. Third, if the pressure in the hopper is not kept constant, there is a problem that it is impossible to control a constant blowing amount in the blowing process.                         

넷째, 취입량 제어불량이 발생하면 용광로 내부 노열 및 노황 유지가 불가능하게 되고 결국 상적인 쇳물 생산이 불가능하게 되는 문제점이 있다.Fourth, there is a problem that it is impossible to maintain the furnace internal furnace and the furnace furnace blast if the injection amount is poorly controlled, and eventually the commercial production of water is impossible.

본 발명은 상기한 기술된 종래 문제점들을 해결하기 위해 안출된 것으로서, 피드호퍼의 충진이 완료된 후 피드호퍼에서 분배변 및 풍구를 통하여 미분탄을 취입하기 위한 압력을 채우기 위하여 실시하는 가압방법을 종래의 연속가압에서 1차가압 후 유동질소에 의한 가압을 실시, 취입중인 호퍼의 진행 상태를 시스템에서 인식 판단하여 2차가압 시기를 결정하고, 결정에 따라 2차가압하는 2단 가압방법을 개발하여 배압 제어변의 주마모 요인인 불필요한 취입대기시간을 없애고, 다음 공정인 취입상태로 진행할 수 있도록 하여 대기 중 발생되는 제어변의 마모를 방지하여 취입량 제어의 안정화를 도모할 수 있는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치 및 제어방법을 제공하는데 그 목적이 있다.SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems in the prior art, and is a conventional continuous method of applying a pressurization method to fill the pressure for blowing pulverized coal through the distribution valve and the tuyere in the feed hopper after the filling of the feed hopper is completed. After the first pressurization in pressurization, pressurized by the flow nitrogen, the system recognizes the hopper's progress and determines the second pressurization time, and develops the second pressurization method to pressurize the second presser according to the decision. Wearing the back pressure control valve in the pulverized coal blowing facility that can stabilize the blowing amount control by eliminating unnecessary waiting time, which is the main wear factor of the valve, and allowing the process to proceed to the blowing state, which is the next process, to prevent wear of the control valve generated in the atmosphere. It is an object of the present invention to provide an anti-hopper pressure control device and a control method.

상기한 목적을 달성하기 위하여, 본 발명은 미분탄 취입설비에서 피드호퍼(40)의 내부압력을 제어하는 장치에 있어서, 상기 피드호퍼(40)의 하부에 설치된 로드셀(44)로부터 무게정보를 받아 연산하는 중량측정연산부(320)와 피드호퍼(40) 및 고로풍구(60)의 압력정보를 받아 처리하는 압력측정처리부(310)로 이루어지는 호퍼신호 측정처리부(300)와; 상기 호퍼신호 측정처리부(300)로부터 받은 접점신호에 따라 충진조건, 취입조건, 배압조건, 가압조건 등에 대한 만족 여부를 판단 처리하는 시퀀스 처리부(210)와; 상기 호퍼신호 측정처리부(300)로부터 각각 피드호퍼(40) 모드상태 및 해당 피드호퍼(40)의 압력상태에 따라 1차가압, 유동질소가압, 2차가압 조건을 판단하는 로직(Logic)으로 이루어지는 2단가압 조건처리부(400)와; 상기 2단가압 조건처리부(400)의 판단조건에 따른 1차가압, 유동질소가압의 진행상태에 따라 2차가압 조건을 판단하는 로직(Logic)으로 이루어지는 2차가압 조건처리부(420)와; 상기 2단가압 조건처리부(400)와 2차가압 조건처리부(420)로부터 판단된 조건에 따라 질소를 가압하는 1차가압 비율기(411) 및 2차가압 비율기(421)와; 상기 1차가압 비율기(411) 및 2차가압 비율기(421)의 2단가압 제어신호에 따라 1,2차가압 프로그램을 선택하는 2단가압조건 신호선택기(430) 및 이로부터 출력된 접점신호에 따라 제어 프로그램을 선택하는 호퍼 운전모드선택기(200)와; 상기 호퍼 운전모드선택기(200)의 신호에 따라 호퍼압력조절계(100)를 제어하는 호퍼압력조절계 설정신호 선택기(101)로 구성되는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치를 제공한다.In order to achieve the above object, the present invention, in the apparatus for controlling the internal pressure of the feed hopper 40 in the pulverized coal injection facility, receives the weight information from the load cell 44 installed in the lower portion of the feed hopper 40 A hopper signal measurement processor (300) including a pressure measurement processor (310) for receiving and processing pressure information of the weighing calculation unit (320), the feed hopper (40), and the blast furnace opening (60); A sequence processor 210 which determines whether the filling condition, the blowing condition, the back pressure condition, the pressurization condition, etc. are satisfied according to the contact signal received from the hopper signal measuring processor 300; Logic for determining the primary pressure, the flow nitrogen pressure, the secondary pressure conditions according to the feed hopper 40 mode state and the pressure state of the feed hopper 40 from the hopper signal measurement processor 300, respectively A two-stage pressure condition processor 400; A secondary pressure condition processor 420 including logic for determining the secondary pressure condition according to the primary pressure and the flow nitrogen pressure in accordance with the determination condition of the second pressure condition processor 400; A primary pressure ratio 411 and a secondary pressure ratio 421 for pressurizing nitrogen according to conditions determined by the second stage pressure condition processor 400 and the secondary pressure condition processor 420; The two-stage pressure condition signal selector 430 for selecting the first and second pressure programs according to the two-stage pressure control signals of the primary pressure ratio 411 and the secondary pressure ratio 421 and the contact point outputted therefrom. A hopper operation mode selector 200 for selecting a control program according to a signal; Hopper pressure control device for preventing the back pressure control valve wear in the pulverized coal injection facility, characterized in that consisting of a hopper pressure control system setting signal selector 101 for controlling the hopper pressure control system 100 according to the signal of the hopper operation mode selector 200. To provide.

한편, 본 발명은 상기와 같이 구성되는 제어장치를 이용하여 피드호퍼(40)의 충진변(41) 및 배압제어변(103)을 완전 개방하고, 가압 제어변(102)를 폐쇄시키고, 유동제어변(111)을 개방하여 미분탄 저장조(30)로부터 미분탄을 피드호퍼(40)로 충진하는 단계와; 상기 미분탄 충진이 완료되면, 상기 배압제어변(103)을 완전 폐쇄시키고, 가압제어변(102)를 개방하고, 유동제어변(111)을 계속 개방하여 1차 가압하는 단계와; 상기 1차 가압이 완료되면, 상기 배압제어변(103)을 계속 폐쇄시키고, 가압제어변(102)을 다시 폐쇄시키고, 유동제어변(111)을 개방하여 유동질소로 가압하는 단계와; 상기 유동질소 가압이 완료되면, 상기 배압제어변(103)을 계속 폐쇄시키고, 가압제어변(102)을 개방시키고, 유동제어변(111)을 계속 개방하여 2차 가압하는 단계와; 상기 2차 가압이 완료되면, 상기 배압제어변(103) 및 가압제어변(102)을 개방시키고, 유동제어변(111)을 계속 개방하여 고로풍구(60)로 미분탄을 취입시키는 단계와; 상기 미분탄 취입이 완료되면, 상기 배압제어변(103)을 개방시키고, 가압제어변(102)을 다시 폐쇄시키고, 유동제어변(111)을 개방하여 배압하는 단계로 구성되는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법을 제공하게 되며,Meanwhile, the present invention completely opens the filling side 41 and the back pressure control side 103 of the feed hopper 40 using the control device configured as described above, closes the pressure control side 102, and controls the flow. Opening the side 111 to fill pulverized coal from the pulverized coal storage tank 30 with a feed hopper 40; When the pulverized coal filling is completed, completely closing the back pressure control valve (103), opening the pressure control valve (102), and continuously opening the flow control valve (111); When the primary pressurization is completed, continuously closing the back pressure control valve (103), closing the pressure control valve (102) again, and opening the flow control valve (111) to pressurize with fluid nitrogen; Continuing to close the back pressure control valve (103), open the pressure control valve (102), and continuously open the flow control valve (111) to pressurize the secondary nitrogen after the flow nitrogen pressurization is completed; When the secondary pressurization is completed, opening the back pressure control valve (103) and the pressure control valve (102), and continuously opening the flow control valve (111) to blow the pulverized coal into the blast furnace vent (60); When the pulverized coal injection is completed, the pulverized coal injection comprises a step of opening the back pressure control valve 103, closing the pressure control valve 102 again, and opening the flow control valve 111 to back pressure. The facility will provide a hopper pressure control method for preventing back pressure control valve wear.

또한, 본 발명은 1차 가압하는 단계에서 피드호퍼(40) 내부압력이 0에서 7㎏/㎠로 가압되고, 유동질소로 가압하는 단계에서는 피드호퍼(40) 내부압력이 7에서 11㎏/㎠로 가압되며, 2차 가압하는 단계에서는 피드호퍼(40) 내부압력이 11에서 12㎏/㎠로 가압되는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법을 제공한다.In addition, in the present invention, the internal pressure of the feed hopper 40 is pressurized from 0 to 7 kg / cm 2 in the first pressurizing step, and the internal pressure of the feed hopper 40 is 7 to 11 kg / cm 2 in the pressurizing with fluid nitrogen. Pressurized by, and the secondary pressurizing step provides a hopper pressure control method for preventing back pressure control valve wear in the pulverized coal injection facility, characterized in that the internal pressure of the feed hopper 40 is pressed from 11 to 12kg / ㎠.

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

도 4에 도시된 바와 같이, 본 발명에 따른 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법은 호퍼신호 측정처리부(300), 호퍼시퀀스 처리부(210), 2단가압 조건처리부(400), 2차가압 조건처리부(420) 및 1,2차가압 비율기(411,421), 신호 선택기(200,430), 조절계(100,110) 및 제어변(102,103,111) 등으로 구성된 미분탄 취입설비에서 이루어진다.As shown in Figure 4, the hopper pressure control method for preventing the back pressure control valve wear in the pulverized coal injection facility according to the present invention is a hopper signal measurement processing unit 300, hopper sequence processing unit 210, two-stage pressure condition processing unit 400, The secondary pressure condition processing unit 420 and the first and second pressure ratio ratios (411,421), the signal selector (200, 430), the control system (100, 110) and control valves 102, 103, 111, etc., made of pulverized coal injection facility.

상기 호퍼측정 신호처리부(300)는 압력측정 처리부(310)와 중량측정 연산부(320)로 이루어져 있으며, 압력측정 처리부(310)는 호퍼(40)의 압력에서 고로 풍구(60)의 압력을 측정 처리하며, 호퍼압력상태에 따라 2단가압 제어신호로 하며, 중량측정 연산부(320)는 피드호퍼(40)의 하부에 설치된 로드셀(44)과, 이로부터 측정된 신호를 입력받는 입력부와 연산부로 구성되어 있다.The hopper measurement signal processing unit 300 is composed of a pressure measurement processing unit 310 and the weighing operation unit 320, the pressure measurement processing unit 310 measures the pressure of the blast furnace 60 at the pressure of the hopper 40 And a two-stage pressure control signal according to the hopper pressure state, and the weight measuring unit 320 includes a load cell 44 installed at the lower portion of the feed hopper 40, and an input unit and a calculating unit which receive signals measured therefrom. It is.

그리고, 상기 시퀀스처리부(210)는 호퍼측정 신호처리부(300)로부터 받은 접점 신호에 상태에 따라 충진조건, 취입조건, 배압조건, 가압조건 등에 대한 만족 여부를 판단 처리하는 조건처리부(400,420)로 구성되어 있다.The sequence processor 210 includes a condition processor 400 and 420 for determining whether the contact signal received from the hopper measurement signal processor 300 satisfies the filling condition, the blowing condition, the back pressure condition, the pressurization condition, and the like. It is.

본 발명을 구성하는 2단가압 조건처리부(400)는 3개의 피드호퍼 모드(Mode) 상태 및 해당 피드호퍼(40)의 압력상태에 따라 1차가압, 유동질소가압,2차 압 조건을 판단하는 로직(Logic)으로 구성되어 있으며, 2차가압 조건처리기(420)는 1차가압, 유동질소가압의 진행 상태에 따라 2차가압 조건을 판단하는 로직(Logic)으로 구성되어 있다.The two-stage pressure condition processing unit 400 constituting the present invention determines the primary pressure, the flow nitrogen pressure, and the secondary pressure conditions according to three feed hopper mode states and the pressure states of the feed hopper 40. The secondary pressure condition processor 420 is configured with logic, and is configured with logic for determining the secondary pressure condition according to the progress state of the primary pressure and the flow nitrogen pressure.

본 발명을 구성하는 신호 선택기는 접점 신호에 따라 제어 프로그램을 선택하여 압력 조절계의 리모트 설정 신호로 사용하기 위한 선택기(200)와 2단가압 제어신호에 따라 1,2차가압 프로그램을 선택하기 위한 선택기(430)로 구성되어 있다.The signal selector constituting the present invention selects a control program according to a contact signal and selector 200 for use as a remote setting signal of a pressure regulator and a selector for selecting a first and second pressure program according to a two-stage pressure control signal. 430.

각각의 피드호퍼(40)의 리모트 설정신호에 따라 호퍼의 압력신호와 비교하여 편차의 크기에 따라 출력신호를 발생하여 압력 조절계(100)와 가압제어변(102), 배압 제어변(103)으로 이루어져 있다.According to the remote setting signal of each feed hopper 40, the output signal is generated according to the magnitude of the deviation compared to the pressure signal of the hopper, and the pressure regulator 100, the pressure control valve 102, the back pressure control valve 103 consist of.

또한, 피드호퍼(40) 하부에서 미분탄의 고착을 방지하고 본 발명의 유동 질소가압기능을 수행하는 유동질소 유량조절계(110) 및 유동질소 유량제어변(111)이 있다.In addition, there is a flow nitrogen flow control system 110 and the flow nitrogen flow control valve 111 to prevent the coal dust is fixed in the feed hopper 40 and to perform the flow nitrogen pressure function of the present invention.

이하, 상기와 같이 구성된 본 발명의 작용을 상세하게 설명한다.Hereinafter, the operation of the present invention configured as described above in detail.

호퍼측정 신호처리부(300) 중 압력측정 처리부(310)는 피드호퍼(40)의 상부에 설치된 압력 발신기(42)에서 측정한 신호를 받아 미도시한 압력측정 처리부(310) 내의 압력조건 설정기의 설정값과 비교하여 1차가압 및 2차가압 완료를 판별 할 수 있는 접점 신호를 발생시키며,The pressure measurement processor 310 of the hopper measurement signal processor 300 receives a signal measured by the pressure transmitter 42 installed at the upper portion of the feed hopper 40, so that the pressure condition setter in the pressure measurement processor 310 is not shown. By comparing with the set value, it generates a contact signal that can determine the completion of the primary and secondary pressure.

중량측정 연산부(320)는 로드셀(44)의 신호를 받아 호퍼의 무게를 제외한 순수 미분탄 무게를 연산 처리하여 얻은 미분탄 중량 측정값을 중량조건 설정기와 비교하여 충진 중인 호퍼의 충진완료 및 취입중인 호퍼의 취입완료를 판별할 수 있는 접점신호를 발생 시킨다.The gravimetric calculation unit 320 receives the signal from the load cell 44 and calculates the fine pulverized coal weight value obtained by calculating the pure pulverized coal weight excluding the weight of the hopper by comparing with the weight condition setter and completing the filling and filling of the hopper being filled. A contact signal is generated to determine the completion of injection.

또한, 시퀀스 처리부(210)는 미리 정해진 호퍼 모드(Mode) 및 호퍼 측정 신호처리부(300)의 접점 신호에 따라 각 호퍼의 충진, 가압, 취입, 배압의 모드(Mode)선택 신호를 발생 시킨다.In addition, the sequence processor 210 generates a mode selection signal for filling, pressing, blowing, and backing pressure of each hopper according to a predetermined hopper mode and a contact signal of the hopper measurement signal processing unit 300.

한편, 2단가압 조건처리부(400)는, 도 7에 도시된 바와 같이, 3개의 피드호퍼(40) 정상동작 여부, 제어 모드(Mode)상태, 미분탄 재고량 상태, 피드호퍼 지정상태를 확인하여 조건이 만족되면 조건처리기(400)에 의해 모드(Mode)선택기는 가압모드(Mode)로 선택되고, 가압조건이 성립되면 해당호퍼의 압력 조절계(100)는 시퀀스 처리부(210) 에 의해 제어 모드(Mode)가 수동(MAN)에서 리모트(REM)로 절환되고, 피드호퍼(40)도 2단가압 모드(Mode)로 선택된다.Meanwhile, as shown in FIG. 7, the two-stage pressure condition processor 400 checks whether the three feed hoppers 40 are in normal operation, a control mode, a pulverized coal stock, and a feed hopper designation condition. If this is satisfied, the mode selector is selected as the pressure mode by the condition processor 400. When the pressure condition is established, the pressure regulator 100 of the hopper is controlled by the sequence processor 210. ) Is switched from manual (MAN) to remote (REM), the feed hopper 40 is also selected as a two-stage pressure mode (Mode).

또한 1차가압이 기동되면서 1차가압의 비율기에 의해 신호가 일정 비율로 점 차 증가되며 비율기의 출력 신호가 미리 설정한 1차가압 완료신호(ST1K)와 일치 되거나 크게 되면 비율기 출력신호의 증가는 멈추고, 이 출력신호는 2단가압 조건신호선택기(430), 피드호퍼 운전모드선택기(200), 호퍼압력조절계 설정신호 선택기(101)를 거쳐 압력 조절계(100)의 설정값이 된다.In addition, when the primary pressure is activated, the signal is gradually increased by the ratio of the primary pressure, and if the output signal of the proportioner is equal to or larger than the preset primary pressure completion signal (ST1K), the output of the proportioner output signal is increased. The increase is stopped, and this output signal becomes the set value of the pressure regulator 100 via the two-stage pressure condition signal selector 430, the feed hopper operation mode selector 200, and the hopper pressure regulator setting signal selector 101.

피드호퍼(40)의 압력조절계(100)는 설정값과 피드호퍼(40)의 압력측정값을 비교하여 편차가 발생하면 조절계(100) 내에서 편차의 크기를 줄여주기 위하여 제어출력 신호를 발생하여 호퍼(40)의 압력을 증대시키게 된다.The pressure regulator 100 of the feed hopper 40 compares the set value with the pressure measurement value of the feed hopper 40 and generates a control output signal to reduce the magnitude of the deviation within the controller 100 when the deviation occurs. The pressure of the hopper 40 is increased.

압력 측정값이 미분탄 취입 최소 압력 설정값(ST1K)에 도달하게 되면 2단가압 조건처리부(400)에서1차가압 완료를 판단하여 2단가압 조건신호선택기(430)의 1차가압 접점출력 신호를 OFF하여 1차가압을 종료시킨다.When the pressure measurement value reaches the minimum pulverized coal injection minimum pressure set value (ST1K), the second stage pressure condition processing unit 400 determines the completion of the primary pressure and outputs the primary pressure contact output signal of the second stage pressure condition signal selector 430. OFF to terminate the primary pressure.

상기와 같이, 1차가압이 종료되면 2단가압 조건신호선택기(430) 선택 위치는 유동질소 가압모드(431)가 선택된다.As described above, when the primary pressure is terminated, the flow nitrogen pressurization mode 431 is selected as the second stage pressure condition signal selector 430.

유동질소 가압모드(431)가 선택되면 압력 조절계(100)의 제어모드가 리모트(REM)에서 수동(MAN)으로 절환되고, 압력 조절계(100)는 가압(102) 및 배압 제어변(103)이 모두 닫히는 출력 값인 50%의 값으로 유지하게 된다.When the flow nitrogen pressurization mode 431 is selected, the control mode of the pressure regulator 100 is switched from the remote REM to manual MAN, and the pressure regulator 100 is pressurized 102 and the back pressure control valve 103. Keep it at the value of 50%, which is the output value that is all closed.

또한 이 때부터는 유동질소 유량조절계(110)에 의해 조절되는 조절신호에 의해 유동질소 유량 제어변(111) 이 열려 유동질소의 공급에 의해 피드호퍼(40)의 압력은 상승하게 된다.In addition, from this time, the flow nitrogen flow control valve 111 is opened by the control signal controlled by the flow nitrogen flow controller 110, so that the pressure of the feed hopper 40 is increased by the supply of flow nitrogen.

유동질소가압이 진행되면, 도 8에 도시된 바와 같이, 2차가압 조건판별을 2차가압 진행접점을 출력시킨다. When the flow nitrogen pressurization proceeds, as shown in FIG. 8, the secondary pressurization condition determination outputs the secondary pressurization contact point.                     

해당 호퍼(40)의 압력 조절계(100)는 시퀀스 처리부(210) 에 의해 제어 모드가 수동(MAN)에서 리모트(REM)로 절환되고 피드호퍼(40)도 2단가압 모드로 선택된다.In the pressure regulator 100 of the hopper 40, the control mode is switched from the manual MAN to the remote REM by the sequence processor 210, and the feed hopper 40 is also selected as the two-stage pressure mode.

또한 2차가압이 기동되면서 2차가압의 비율기(421)에 의해 신호가 일정 비율로 점차 증가되며, 비율기(421)의 출력신호가 미리 설정한, 도 9의 취입량별 요구 압력값과 일치되거나 크게 되면 비율기(421) 출력신호의 증가는 멈추고, 이 출력신호는 가압모드 선택기(430), 운전 모드 선택기(200), 조절계 모드선택기(101)를 거쳐 압력 조절계(100)의 설정값이 된다.In addition, as the secondary pressure is started, the signal is gradually increased by the ratio 421 of the secondary pressure at a constant rate, and the output signal of the proportioner 421 matches the required pressure value for each blowing amount shown in FIG. 9 previously set. If the increase or increase of the output signal of the proportioner 421 is stopped, this output signal is set through the pressure mode selector 430, the operation mode selector 200, the controller mode selector 101, do.

피드호퍼(40)의 압력 조절계(100)는 설정값과 피드호퍼(40)의 압력측정값을 비교하여 편차가 발생하면 조절계(100) 내에서 편차의 크기를 줄여주기 위하여 제어출력신호를 발생하여 호퍼의 압력을 증대시키게 된다.The pressure regulator 100 of the feed hopper 40 compares the set value with the pressure measurement value of the feed hopper 40 and generates a control output signal to reduce the magnitude of the deviation within the controller 100 when the deviation occurs. This will increase the pressure of the hopper.

압력 측정값이 미분탄 취입량별 요구 압력값에 도달하게 되면 2단 가압 조건처리부(400)에서 2차가압 완료를 판단, 선택기(430)의 2차가압 접점출력 신호를 OFF하여 2차가압을 종료시킨다.When the pressure measurement value reaches the required pressure value for the pulverized coal injection amount, the second stage pressure condition processing unit 400 determines the completion of the secondary pressure, turns off the secondary pressure contact output signal of the selector 430, and terminates the secondary pressure. .

2차 가압이 종료되면 취입조건과 취입상태를 확인하여 취입을 하게 됨으로써 가압 완료 후 대기시간에 발생되는 배압 제어변(103)의 마모를 방지 할 수 있다.When the secondary pressurization is finished, the blowing condition and the blowing state are checked and the blowing is performed, thereby preventing wear of the back pressure control valve 103 generated in the waiting time after the completion of the pressing.

상술한 바와 같이, 본 발명은 피드호퍼의 충진이 완료된 후 피드호퍼에서 미분탄을 취입하기 위한 압력을 채우기 위하여 실시하는 가압방법을 종래 연속가압에서, 1차가압 후 유동질소에 의한 가압을 실시하여 취입중인 호퍼의 진행상태를 시 스템에서 인식판단하여 2차가압 시기를 결정하고 결정에 따라 2차 가압하는 2단가압 방법을 개발하여 배압제어변(103)의 주마모 요인인 불필요한 취입대기시간을 없애고, 다음 취입상태로 진행하기 위한 대기시간을 확보토록 하여 대기 중에 발생되는 제어변의 마모를 방지하여 취입량 제어의 안정화를 도모하여 고로의 쇳물 생산을 원활하게 하는 효과가 있다.As described above, the present invention is a pressurization method performed to fill the pressure for blowing the pulverized coal in the feed hopper after the filling of the feed hopper in the conventional continuous pressurization, by pressurizing by the flow nitrogen after the first pressurization The system recognizes the progress of the current hopper and determines the second pressurization time, and then develops a two-stage pressurization method to pressurize the secondary according to the decision to eliminate unnecessary blow waiting time, which is the main wear factor of the back pressure control valve 103. In order to secure the waiting time to proceed to the next blown state, it is possible to prevent the wear of the control valve generated in the air and to stabilize the blown amount control, thereby facilitating the production of waste water in the blast furnace.

Claims (7)

미분탄 취입설비에서 피드호퍼(40)의 내부압력을 제어하는 장치에 있어서,In the apparatus for controlling the internal pressure of the feed hopper 40 in the pulverized coal injection facility, 상기 피드호퍼(40)의 무게정보 및 압력정보와 고로풍구(60)의 압력정보를 입력받아 처리하는 호퍼신호 측정처리부(300)와; 상기 호퍼신호 측정처리부(300)로부터 받은 접점신호에 따라 충진조건, 취입조건, 배압조건, 가압조건에 대한 만족 여부를 판단 처리하는 시퀀스 처리부(210)와; 상기 호퍼신호 측정처리부(300)로부터 각각 피드호퍼(40) 모드상태 및 해당 피드호퍼(40)의 압력상태에 따라 가압조건을 판단하는 로직(Logic)으로 이루어지는 2단가압 조건처리부(400)와; 상기 2단가압 조건처리부(400)의 판단조건에 따른 1차가압, 유동질소가압의 진행상태에 따라 2차가압 조건을 판단하는 로직(Logic)으로 이루어지는 2차가압 조건처리부(420)와; 상기 2단가압 조건처리부(400)와 2차가압 조건처리부(420)로부터 판단된 조건에 따라 질소를 가압하는 1차가압 비율기(411) 및 2차가압 비율기(421)와; 상기 1차가압 비율기(411) 및 2차가압 비율기(421)의 2단가압 제어신호에 따라 1,2차가압 프로그램을 선택하는 2단가압조건 신호선택기(430) 및 이로부터 출력된 접점신호에 따라 제어 프로그램을 선택하는 호퍼 운전모드선택기(200)와; 상기 호퍼 운전모드선택기(200)의 신호에 따라 호퍼압력조절계(100)를 제어하는 호퍼압력조절계 설정신호 선택기(101)로 구성되는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치.A hopper signal measuring processor 300 for receiving and processing the weight information and the pressure information of the feed hopper 40 and the pressure information of the blast furnace opening 60; A sequence processor 210 which determines whether the filling condition, the blowing condition, the back pressure condition, and the pressing condition are satisfied according to the contact signal received from the hopper signal measuring processor 300; A two-stage pressure condition processor 400 comprising logic for determining a pressurization condition according to the feed hopper 40 mode state and the pressure state of the feed hopper 40 from the hopper signal measurement processor 300; A secondary pressure condition processor 420 including logic for determining the secondary pressure condition according to the primary pressure and the flow nitrogen pressure in accordance with the determination condition of the second pressure condition processor 400; A primary pressure ratio 411 and a secondary pressure ratio 421 for pressurizing nitrogen according to conditions determined by the second stage pressure condition processor 400 and the secondary pressure condition processor 420; The two-stage pressure condition signal selector 430 for selecting the first and second pressure programs according to the two-stage pressure control signals of the primary pressure ratio 411 and the secondary pressure ratio 421 and the contact point outputted therefrom. A hopper operation mode selector 200 for selecting a control program according to a signal; Hopper pressure control device for preventing the back pressure control valve wear in the pulverized coal injection facility, characterized in that consisting of a hopper pressure control system setting signal selector 101 for controlling the hopper pressure control system 100 according to the signal of the hopper operation mode selector 200. . 청구항 1에 있어서,The method according to claim 1, 상기 호퍼신호 측정처리부(300)는 상기 피드호퍼(40)의 하부에 설치된 로드셀(44)로부터 무게정보를 받아 연산하는 중량측정연산부(320)와, 상기 피드호퍼(40) 및 고로풍구(60)의 압력정보를 받아 처리하는 압력측정처리부(310)로 구성되는 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치.The hopper signal measurement processing unit 300 is a weight calculation unit 320 for calculating the weight information from the load cell 44 installed in the lower portion of the feed hopper 40, the feed hopper 40 and the blast furnace 60 Hopper pressure control device for preventing wear of the back pressure control valve in the pulverized coal injection facility, characterized in that the pressure measurement processing unit 310 for receiving and processing the pressure information. 청구항 1에 있어서,The method according to claim 1, 상기 2단가압 조건처리부(400)는 상기 호퍼신호 측정처리부(300)로부터 각각 피드호퍼(40) 모드상태 및 해당 피드호퍼(40)의 압력상태에 따라 1차가압, 유동질소가압, 2차가압 조건을 판단하는 로직(Logic)으로 구성되는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어장치.The two-stage pressure condition processing unit 400 is the primary pressure, the flow nitrogen pressure, the secondary pressure according to the feed hopper 40 mode state and the pressure state of the feed hopper 40 from the hopper signal measurement processing unit 300, respectively. Hopper pressure control device for preventing wear of the back pressure control valve in the pulverized coal injection facility, characterized in that consisting of logic (Logic) to determine the condition. 피드호퍼(40)의 충진변(41) 및 배압제어변(103)을 완전 개방하고, 가압 제어변(102)를 폐쇄시키고, 유동제어변(111)을 개방하여 미분탄 저장조(30)로부터 미분탄을 피드호퍼(40)로 충진하는 단계와;The filling side 41 and back pressure control side 103 of the feed hopper 40 are completely opened, the pressure control side 102 is closed, and the flow control side 111 is opened to remove pulverized coal from the pulverized coal storage tank 30. Filling with a feed hopper 40; 상기 미분탄 충진이 완료되면, 상기 배압제어변(103)을 완전 폐쇄시키고, 가압제어변(102)를 개방하고, 유동제어변(111)을 계속 개방하여 1차 가압하는 단계와;When the pulverized coal filling is completed, completely closing the back pressure control valve (103), opening the pressure control valve (102), and continuously opening the flow control valve (111); 상기 1차 가압이 완료되면, 상기 배압제어변(103)을 계속 폐쇄시키고, 가압 제어변(102)을 다시 폐쇄시키고, 유동제어변(111)을 개방하여 유동질소로 가압하는 단계와;When the primary pressure is completed, continuing to close the back pressure control valve (103), close the pressure control valve (102) again, and open the flow control valve (111) to pressurize with fluid nitrogen; 상기 유동질소 가압이 완료되면, 상기 배압제어변(103)을 계속 폐쇄시키고, 가압제어변(102)을 개방시키고, 유동제어변(111)을 계속 개방하여 2차 가압하는 단계와;Continuing to close the back pressure control valve (103), open the pressure control valve (102), and continuously open the flow control valve (111) to pressurize the secondary nitrogen after the flow nitrogen pressurization is completed; 상기 2차 가압이 완료되면, 상기 배압제어변(103) 및 가압제어변(102)을 개방시키고, 유동제어변(111)을 계속 개방하여 고로풍구(60)로 미분탄을 취입시키는 단계와;When the secondary pressurization is completed, opening the back pressure control valve (103) and the pressure control valve (102), and continuously opening the flow control valve (111) to blow the pulverized coal into the blast furnace vent (60); 상기 미분탄 취입이 완료되면, 상기 배압제어변(103)을 개방시키고, 가압제어변(102)을 다시 폐쇄시키고, 유동제어변(111)을 개방하여 배압하는 단계로 구성되는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법.When the pulverized coal injection is completed, the pulverized coal injection comprises a step of opening the back pressure control valve 103, closing the pressure control valve 102 again, and opening the flow control valve 111 to back pressure. Hopper pressure control method to prevent back pressure control valve wear in equipment. 청구항 4에 있어서,The method according to claim 4, 상기 1차 가압하는 단계는 피드호퍼(40) 내부압력을 0에서 7㎏/㎠로 가압하는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법.The first step of pressurizing the hopper pressure control method for preventing wear of the back pressure control valve in the pulverized coal injection facility, characterized in that to press the internal pressure of the feed hopper 40 from 7kg / ㎠. 청구항 4에 있어서,The method according to claim 4, 상기 유동질소로 가압하는 단계는 피드호퍼(40) 내부압력을 7에서 11㎏/㎠로 가압하는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법.The pressurizing with the flow nitrogen is a hopper pressure control method for preventing wear of the back pressure control valve in the pulverized coal injection facility, characterized in that for pressurizing the internal pressure of the feed hopper 40 from 11 kg / ㎠. 청구항 4에 있어서,The method according to claim 4, 상기 2차 가압하는 단계는 피드호퍼(40) 내부압력을 11에서 12㎏/㎠로 가압하는 것을 특징으로 하는 미분탄 취입설비에서 배압제어변 마모방지용 호퍼압력 제어방법.The secondary pressurizing step is a hopper pressure control method for preventing wear of the back pressure control valve in the pulverized coal injection facility, characterized in that to pressurize the internal pressure of the feed hopper 40 from 11 to 12kg / ㎠.
KR1020030049346A 2003-07-18 2003-07-18 Apparatus for controlling the pressure of feed hopper to prevent vent valve from being wearing, and controlling method the same KR100971983B1 (en)

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KR100985266B1 (en) * 2008-08-08 2010-10-04 주식회사 포스코 Device and method for pressing dust coal feed hopper
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KR20000037761A (en) * 1998-12-02 2000-07-05 이구택 Device for controlling feed hopper of dust coal
JP2001003106A (en) 1999-06-18 2001-01-09 Kawasaki Steel Corp Method and apparatus for supplying pulverized fine coal into blowing tank from intermediate tank in pulverized fine coal blowing equipment in blast furnace
JP2001059108A (en) 1999-08-18 2001-03-06 Kawasaki Steel Corp Method for controlling exhaust pressure
KR20040011190A (en) * 2002-07-29 2004-02-05 주식회사 포스코 Apparatus for controling pressure and air flow of feed hopper for feeding pulverizer coal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000037761A (en) * 1998-12-02 2000-07-05 이구택 Device for controlling feed hopper of dust coal
JP2001003106A (en) 1999-06-18 2001-01-09 Kawasaki Steel Corp Method and apparatus for supplying pulverized fine coal into blowing tank from intermediate tank in pulverized fine coal blowing equipment in blast furnace
JP2001059108A (en) 1999-08-18 2001-03-06 Kawasaki Steel Corp Method for controlling exhaust pressure
KR20040011190A (en) * 2002-07-29 2004-02-05 주식회사 포스코 Apparatus for controling pressure and air flow of feed hopper for feeding pulverizer coal

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