KR20120074034A - Method for correcting injection amount of a pulverized coal into blow furnace - Google Patents

Method for correcting injection amount of a pulverized coal into blow furnace Download PDF

Info

Publication number
KR20120074034A
KR20120074034A KR1020100135975A KR20100135975A KR20120074034A KR 20120074034 A KR20120074034 A KR 20120074034A KR 1020100135975 A KR1020100135975 A KR 1020100135975A KR 20100135975 A KR20100135975 A KR 20100135975A KR 20120074034 A KR20120074034 A KR 20120074034A
Authority
KR
South Korea
Prior art keywords
pulverized coal
injection
value
hopper
correction value
Prior art date
Application number
KR1020100135975A
Other languages
Korean (ko)
Other versions
KR101177040B1 (en
Inventor
박경한
정영수
Original Assignee
주식회사 포스코
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 포스코 filed Critical 주식회사 포스코
Priority to KR1020100135975A priority Critical patent/KR101177040B1/en
Publication of KR20120074034A publication Critical patent/KR20120074034A/en
Application granted granted Critical
Publication of KR101177040B1 publication Critical patent/KR101177040B1/en

Links

Images

Classifications

    • 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
    • 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
    • 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
    • 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
    • F27D19/00—Arrangements of controlling devices
    • F27D2019/0028—Regulation
    • F27D2019/0075—Regulation of the charge quantity

Landscapes

  • Engineering & Computer Science (AREA)
  • 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

PURPOSE: A correcting method for fine coal injection quantity into a blast furnace is provided to control the injection quantity of fine coal accurately by correcting a flow meter of fine coal injection pipe, the weight change of fine coal, and the transferring quantity of fine coal. CONSTITUTION: A correcting method for fine coal injection quantity into a blast furnace is as follows. The transferring quantity of fine coal is measured in a weighing machine(4) of a fine coal transferring hopper. The injection quantity of fine coal is measured by a flowmeter(7) of a fine coal injection branch pipe which blowing fine coal into a tuyere of a blast furnace from an injection hopper. A deviation value is calculated through the weight changing ratio and transferring quantity of fine coal based on fine coal injection quantity in determined term. A correction value for correcting a flow meter of a fine coal injection branch pipe is calculated from the deviation value and a fine coal injection quantity is determined by using a flow value and the correcting value.

Description

고로 미분탄 취입량 보정방법{Method for correcting injection amount of a pulverized coal into blow furnace} Method for correcting injection amount of a pulverized coal into blow furnace}

본 발명은 고로 미분탄 취입량을 보정하는 방법에 관한 것으로, 보다 상세하게는 미분탄 취입량을 측정하는 미분탄 취입 지관의 유량계를 정확하게 교정하여 미분탄의 취입량을 정확하게 산출함으로써 미분탄의 이송 및 취입 공정을 원활히 제어하도록 하는 고로 미분탄 취입량 보정방법에 관한 것이다.The present invention relates to a method for correcting the blast furnace coal injection amount, and more particularly, by accurately calibrating the flow meter of the pulverized coal injection branch to measure the pulverized coal injection amount to calculate the injection amount of pulverized coal to facilitate the transfer and blowing process of pulverized coal. The present invention relates to a blast furnace fine coal injection amount correction method for controlling.

고로는 철광석으로부터 선철(銑鐵)을 만드는데 사용되는 노로서, 풍구를 통하여 취입되는 미분탄을 보조열원으로 사용한다.The blast furnace is a furnace used to make pig iron from iron ore, and pulverized coal blown through the tuyere is used as an auxiliary heat source.

도 1은 일반적인 고로 미분탄 이송 및 취입 설비를 개략적으로 나타낸 도면이다. 도시를 참조하면 고로 미분탄 이송 및 취입 설비는 미분탄 저장 호퍼(12)와 미분탄 이송 호퍼(1), 인젝션 호퍼(2)로 이루어지며, 인젝션 호퍼(2)로부터 고로 풍구(3)를 통하여 미분탄을 취입하도록 구성되어 있다.1 is a view schematically showing a typical blast furnace coal powder conveying and blowing facility. Referring to the city, the blast furnace pulverized coal conveying and blowing facility comprises a pulverized coal storage hopper 12, a pulverized coal conveying hopper 1, and an injection hopper 2, and injects pulverized coal from the injection hopper 2 through the blast furnace tuyere 3. It is configured to.

미분탄 저장 호퍼(12)에 저장된 미분탄은 제어밸브(12a)의 개방시 미분탄 이송 호퍼(1)로 공급된다. 미분탄 이송 호퍼(1)에는 공급된 미분탄의 무게를 측정하도록 평량기(4)가 설치되어 있다.The pulverized coal stored in the pulverized coal storage hopper 12 is supplied to the pulverized coal transfer hopper 1 when the control valve 12a is opened. The pulverized coal transfer hopper 1 is provided with a weighing machine 4 so as to measure the weight of the pulverized coal supplied.

미분탄 이송 컨트롤 밸브(10)가 개방되면 미분탄 이송 호퍼(1)의 미분탄은 미분탄 이송 라인(8)을 통해 인젝션 호퍼(2)로 공급된다. 인젝션 호퍼(2)에는 공급된 미분탄의 무게를 측정하도록 인젝션 호퍼 평량기(5)가 설치되어 있다. 상기 미분탄 이송 컨트롤 밸브(10)는 미분탄 이송 라인(8)에 설치되어 미분탄의 이송량을 제어하는 것이다.When the pulverized coal transfer control valve 10 is opened, the pulverized coal of the pulverized coal transfer hopper 1 is supplied to the injection hopper 2 through the pulverized coal transfer line 8. The injection hopper 2 is provided with an injection hopper weighing machine 5 to measure the weight of the pulverized coal supplied. The pulverized coal feed control valve 10 is installed in the pulverized coal feed line 8 to control the feed amount of pulverized coal.

그리고 미분탄 취입 지관 컨트롤 밸브(6)의 개방시 인젝션 호퍼(2)의 미분탄은 미분탄 취입 지관(9)을 통해 고로 풍구(3)로 공급된다. The pulverized coal of the injection hopper 2 is supplied to the blast furnace vent 3 through the pulverized coal injection branch pipe 9 when the pulverized coal injection branch pipe control valve 6 is opened.

통상 고로의 하부에는 36개의 고로 풍구(3)가 환상형으로 설치되어 있으며, 고로에는 36개의 미분탄 취입 지관(9)이 연결되어 있어 이로부터 공급된 미분탄을 고로 풍구(3)를 통해 고로 내부로 취입하도록 이루어진다.In the lower part of the blast furnace, 36 blast furnace tuyere (3) is provided in an annular shape, and 36 pulverized coal blowing branch pipes (9) are connected to the blast furnace, and the pulverized coal supplied therefrom is introduced into the blast furnace through the blast furnace tuyere (3). Blowing is done.

상기 미분탄 이송 호퍼(1)의 평량기(4)는 미분탄 이송 호퍼(1)에 장입된 미분탄의 중량을 측정하며, 측정된 미분탄의 중량변화로부터 미분탄 이송량을 산출한다. 상기 인젝션 호퍼(2)의 평량기(5)는 인젝션 호퍼(2)에 장입된 미분탄의 중량을 측정한다. 상기 평량기(5)에 의해 측정된 인젝션 호퍼(2)의 미분탄 중량이 상,하 임계값에서 벗어나게 되면 경보를 출력하여 노황을 관리하도록 되어 있다.The weighing machine 4 of the pulverized coal conveying hopper 1 measures the weight of pulverized coal charged into the pulverized coal conveying hopper 1, and calculates the pulverized coal conveying quantity from the measured weight change of the pulverized coal. The weighing machine 5 of the injection hopper 2 measures the weight of pulverized coal charged into the injection hopper 2. When the pulverized coal weight of the injection hopper 2 measured by the weighing machine 5 is out of the upper and lower threshold values, an alarm is output to manage the yellowing.

미분탄 취입 지관 컨트롤 밸브(6)는 미분탄 취입 지관(9)에 설치되며, 미분탄 취입 설정값(SV)을 지관 수량으로 나눈 값을 기준으로 하여 미분탄 취입량을 제어한다.The pulverized coal injection branch pipe control valve 6 is installed in the pulverized coal injection branch pipe 9 and controls the pulverized coal injection amount based on the value obtained by dividing the pulverized coal injection set value SV by the branch water quantity.

미분탄 취입 지관 유량계(7)는 미분탄 취입 지관 컨트롤 밸브(6)의 후단측 미분탄 취입 지관(9)상에 설치되어 고로로 취입되는 미분탄 취입량을 측정한다.The pulverized coal injection branch pipe flow meter 7 is installed on the pulverized coal injection branch pipe 9 at the rear end of the pulverized coal injection branch pipe control valve 6 to measure the amount of pulverized coal injection into the blast furnace.

상기의 구조로 된 고로 미분탄 이송 및 취입 설비에 있어서, 미분탄 취입 지관 유량계(7)는 미분탄의 종류별로 검출되는 유량이 변동하여 불규칙한 측정값을 출력하는 문제가 있다. 따라서 정확한 미분탄 취입량을 측정하지 못하게 되고, 미분탄 이송량과 미분탄 취입량의 편차를 목표값으로 정확하게 관리하기 어려워져 노황관리에 장애 요인으로 작용한다. In the blast furnace pulverized coal conveying and blowing facility having the above structure, the pulverized coal blowing branch pipe flow meter 7 has a problem in that the flow rate detected for each type of pulverized coal fluctuates and outputs irregular measured values. Therefore, it is difficult to accurately measure the amount of pulverized coal injection, and it becomes difficult to accurately manage the deviation between the pulverized coal transfer amount and the pulverized coal injection amount as a target value, which acts as a barrier to the yellowing management.

그 결과 고로 풍구로의 미분탄 취입 제어를 원활히 수행하지 못하여 용선의 품질에 영향을 미칠 뿐만 아니라, 최악의 경우 인젝션 호퍼(2)의 중량에 따라 미분탄의 이송 공정이나 취입 공정을 중단하여야 하는 문제가 발생하게 된다.As a result, the control of pulverized coal injection into the blast furnace blast furnace is not carried out smoothly, which affects the quality of the molten iron, and in the worst case, the problem of having to stop the pulverized coal transfer process or the blowing process according to the weight of the injection hopper 2 occurs. Done.

현재 적용되고 있는 기술은 인젝션 호퍼(2)의 중량이 설정된 중량보다 높으면 미분탄 이송 호퍼(1)의 미분탄 이송 설정량(SV)을 설정된 테이블만큼 낮추고 인젝션 호퍼(2)의 중량이 설정된 중량보다 낮으면 미분탄 이송 설정량(SV)을 설정된 테이블만큼 높이는 기능을 제어시스템에서 구현하고 있으나, 미분탄의 종류가 셀 수 없이 많아 현재의 기능만으로는 미분탄의 이송량과 취입량을 정확하게 제어하는데에 한계가 따르고 있다.Currently applied technology is to lower the pulverized coal feed set amount (SV) of the pulverized coal transfer hopper 1 by the set table when the weight of the injection hopper 2 is higher than the set weight, and when the weight of the injection hopper 2 is lower than the set weight. Although the control system implements the function of raising the pulverized coal feed set amount (SV) as much as the set table, there are many types of pulverized coal, and there is a limit to precisely controlling the feed amount and blown amount of pulverized coal by the current function alone.

본 발명은 상술한 바와 같은 종래 기술의 제반 문제점을 해소하고자 안출된 것으로, 그 목적은 미분탄 취입량을 정확하게 보정하여 미분탄의 이송 및 취입 공정을 원활히 제어하도록 하는 고로 미분탄 취입량 보정방법을 제공하고자 함에 있다.The present invention has been made to solve all the problems of the prior art as described above, the object of the present invention is to provide a blast furnace fine coal injection amount correction method to accurately control the transfer and blowing process of pulverized coal by correcting the fine coal injection amount have.

상기 과제를 해결하기 위한 본 발명의 고로 미분탄 취입량 보정방법은, 미분탄 이송 호퍼의 평량기에서 측정된 미분탄 이송량과, 상기 미분탄 이송 호퍼로부터 미분탄이 공급되는 인젝션 호퍼에서 측정된 미분탄 중량의 변화량으로부터 상기 인젝션 호퍼에서 고로 풍구로 미분탄을 취입하도록 된 미분탄 취입 지관의 유량계에 의하여 측정된 유량값을 보정하기 위한 보정값을 산출하고, 미분탄 취입 지관의 유량계에 의하여 측정된 유량값에 상기 보정값을 반영하여 미분탄 취입량을 산출하는 것을 특징으로 한다.The blast furnace pulverized coal injection amount correction method of the present invention for solving the above problems is based on the pulverized coal transfer amount measured in the weighing machine of the pulverized coal transfer hopper and the change amount of the pulverized coal weight measured in the injection hopper supplied with the pulverized coal from the pulverized coal transfer hopper. A correction value for correcting the flow rate value measured by the flow meter of the pulverized coal injection branch pipe which is to inject the pulverized coal into the blast furnace vent from the injection hopper is calculated, and the correction value is reflected in the flow rate value measured by the flow meter of the pulverized coal injection branch pipe. It is characterized by calculating the pulverized coal injection amount.

본 발명의 고로 미분탄 취입량 보정방법은, 미분탄 이송 호퍼의 평량기에서 미분탄 이송량을 측정하는 단계와; 상기 미분탄 이송 호퍼로부터 미분탄이 공급되는 인젝션 호퍼의 평량기에서 미분탄 중량을 측정하는 단계와; 상기 인젝션 호퍼로부터 고로 풍구로 미분탄을 취입하도록 된 미분탄 취입 지관의 유량계에서 미분탄 취입량을 측정하는 단계와; 설정된 시간동안 측정된 상기 미분탄 중량의 변화량을 계산하는 단계와; 설정된 시간동안 측정된 미분탄 취입량에 대한 미분탄 이송량과 미분탄 중량의 변화량의 비로부터 편차값을 산출하는 단계; 및 산출된 편차값으로부터 상기 미분탄 취입 지관의 유량계를 교정하기 위한 보정값을 산출하고, 상기 미분탄 취입 지관의 유량계에서 측정된 유량값에 상기 보정값을 반영한 값을 미분탄 취입량으로 하는 미분탄 취입 지관의 유량계 교정단계;를 포함하여 이루어지는 것을 특징으로 한다.The blast furnace pulverized coal injection amount correction method of the present invention includes the steps of measuring the pulverized coal transfer amount in the weighing machine of the pulverized coal transfer hopper; Measuring the pulverized coal weight in the weighing machine of the injection hopper supplied with pulverized coal from the pulverized coal transfer hopper; Measuring the pulverized coal injection amount in the flow meter of the pulverized coal injection branch pipe which is to blow the pulverized coal into the blast furnace tuyere from the injection hopper; Calculating a change amount of the pulverized coal weight measured during the set time; Calculating a deviation value from the ratio of the pulverized coal feed amount and the pulverized coal weight change to the pulverized coal injection amount measured during the set time; And calculating a correction value for calibrating the flowmeter of the pulverized coal injection branch from the calculated deviation value, and calculating the pulverized coal injection branch into a value in which the correction value is reflected in the flow rate measured by the flowmeter of the pulverized coal injection branch. Flowmeter calibration step; characterized in that comprises a.

본 발명의 고로 미분탄 취입량 보정방법은, 하기의 식 1에 의하여 편차값을 산출하는 것을 특징으로 한다.The blast furnace fine coal injection amount correction method of the present invention is characterized by calculating a deviation value by the following equation (1).

편차값 = (미분탄 이송량 + I/H 변화량) / 미분탄 취입량 ----- 식 1Deviation Value = (Pulverized Coal Transport + I / H Change) / Pulverized Coal Blow ----- Equation 1

상기 I/H 변화량은 인젝션 호퍼에 의하여 T시점에서 측정된 미분탄 중량에서 인젝션 호퍼에 의하여 T+Ts시점에서 측정된 미분탄 중량을 뺀 값, 상기 Ts는 설정된 시간을 의미한다.The I / H change amount is a value obtained by subtracting the pulverized coal weight measured at the T + Ts point by the injection hopper from the pulverized coal weight measured at the T point of the injection hopper, and Ts means a set time.

본 발명의 고로 미분탄 취입량 보정방법은, 하기의 식 2에 의하여 보정값을 산출하는 것을 특징으로 한다.The blast furnace fine coal injection amount correction method of this invention is characterized by calculating a correction value by following formula (2).

보정값 = {(편차값×보정값2×K)+(보정값3+보정값2)}/(K+2) ----- 식 2Correction value = {(deviation value × correction value 2 × K) + (correction value 3 + correction value 2)} / (K + 2) ----- Equation 2

상기 보정값2는 과거에 보정값으로 저장되어 있었던 값, 보정값3은 과거에 보정값2로 저장되어 있었던 값, K는 보정상수이다.The correction value 2 is a value previously stored as a correction value, the correction value 3 is a value previously stored as a correction value 2, and K is a correction constant.

본 발명에 의하면 미분탄 이송 호퍼의 평량기에서 측정된 미분탄 이송량과, 인젝션 호퍼에서 측정된 미분탄 중량의 변화량과, 미분탄 취입 지관의 유량계에서 측정된 미분탄 취입량으로부터 미분탄 취입 지관의 유량계를 정확하게 교정함으로서 정확한 미분탄 취입량을 산출하여 미분탄 이송 및 취입 제어를 수행할 수 있다. 따라서 고로에 미분탄을 안정적으로 공급함으로써 용선의 생산성을 향상할 수 있으며 안정적인 노황 관리가 가능하다.According to the present invention, it is possible to precisely calibrate the flowmeter of the pulverized coal injection branch by accurately calibrating the pulverized coal transfer amount measured in the weighing machine of the pulverized coal transfer hopper, the change in the pulverized coal weight measured in the injection hopper, and the pulverized coal injection amount measured in the flowmeter of the pulverized coal injection branch. Pulverized coal injection and blowing control can be performed by calculating the pulverized coal injection amount. Therefore, the stable supply of pulverized coal to the blast furnace can improve the productivity of the molten iron, and stable aging management.

도 1은 일반적인 미분탄 이송 및 취입 설비를 개략적으로 나타낸 도면,
도 2는 본 발명의 일 실시예에 따른 고로 미분탄 취입량 보정방법을 수행하기 위한 시스템의 구성도,
도 3은 본 발명의 일 실시예에 따른 고로 미분탄 취입량 보정방법의 순서도이다.1 is a view schematically showing a general pulverized coal transport and blowing facility,
2 is a configuration diagram of a system for performing a blast furnace fine coal injection amount correction method according to an embodiment of the present invention,
3 is a flow chart of the blast furnace fine coal injection amount correction method according to an embodiment of the present invention.

이하, 첨부된 도면을 참조하여 본 발명의 바람직한 실시예에 대해 설명한다. 그러나 본 발명은 여기서 설명되어지는 실시예에 한정되지 않고 다른 형태로 구체화될 수도 있다. 오히려 여기서 소개되는 실시예는 개시된 내용이 철저하고 완전해질 수 있도록 그리고 본 발명의 기술분야의 통상의 기술자에게 본 발명의 기술적 사상이 충분히 전달될 수 있도록 제공되는 것이다.Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed contents may be thorough and complete, and the technical spirit of the present invention may be sufficiently delivered to those skilled in the art.

도 2는 본 발명의 일 실시예에 따른 고로 미분탄 취입량 보정방법을 수행하기 위한 시스템의 구성도이다. 본 발명의 고로 미분탄 취입량 보정방법은 제어부(11)의 알고리즘에 의하여 수행되는 것으로, 제어부(11)를 제외한 그 밖의 미분탄 이송 및 취입을 위한 구성은 종래와 동일하다. 즉, 도 1의 도시와 같이 미분탄 저장 호퍼(12)에 저장된 미분탄은 제어밸브(12a)의 개방시 미분탄 이송 호퍼(1)로 공급되고, 미분탄 이송 호퍼(1)에는 공급된 미분탄의 무게를 측정하도록 평량기(4)가 설치되어 있다. 그리고 미분탄 이송 컨트롤 밸브(10)가 개방되면 미분탄 이송 호퍼(1)의 미분탄은 미분탄 이송 라인(8)을 통해 인젝션 호퍼(2)로 공급되며, 인젝션 호퍼(2)에는 공급된 미분탄의 무게를 측정하도록 인젝션 호퍼 평량기(5)가 설치되어 있다. 상기 미분탄 이송 컨트롤 밸브(10)는 미분탄 이송 라인(8)에 설치되어 미분탄의 이송량을 제어한다. 그리고 미분탄 취입 지관 컨트롤 밸브(6)의 개방시 인젝션 호퍼(2)의 미분탄은 미분탄 취입 지관(9)을 통해 고로 풍구(3)로 공급된다. 상기 미분탄 이송 호퍼(1)의 평량기(4)는 미분탄 이송 호퍼(1)에 장입된 미분탄의 중량을 측정하며, 측정된 미분탄의 중량변화로부터 미분탄 이송량을 산출한다. 상기 인젝션 호퍼(2)의 평량기(5)는 인젝션 호퍼(2)에 장입된 미분탄의 중량을 측정한다. 미분탄 취입 지관 컨트롤 밸브(6)는 미분탄 취입 지관(9)에 설치되며, 미분탄 취입 설정값(SV)을 지관 수량으로 나눈 값을 기준으로 하여 미분탄 취입량을 제어한다. 미분탄 취입 지관 유량계(7)는 미분탄 취입 지관 컨트롤 밸브(6)의 후단측 미분탄 취입 지관(9)에 설치되어 고로로 취입되는 미분탄 취입량을 측정한다.2 is a block diagram of a system for performing a blast furnace fine coal injection amount correction method according to an embodiment of the present invention. The blast furnace pulverized coal injection amount correction method of the present invention is performed by the algorithm of the control unit 11, except for the control unit 11, the configuration for the transfer and injection of the pulverized coal is the same as before. That is, as shown in FIG. 1, the pulverized coal stored in the pulverized coal storage hopper 12 is supplied to the pulverized coal transport hopper 1 when the control valve 12a is opened, and the pulverized coal transport hopper 1 measures the weight of the pulverized coal supplied. The weighing machine 4 is provided so that it may be. When the pulverized coal transfer control valve 10 is opened, the pulverized coal of the pulverized coal transfer hopper 1 is supplied to the injection hopper 2 through the pulverized coal transfer line 8, and the weight of the pulverized coal supplied to the injection hopper 2 is measured. The injection hopper weighing machine 5 is provided. The pulverized coal feed control valve 10 is installed in the pulverized coal feed line 8 to control the feed amount of pulverized coal. The pulverized coal of the injection hopper 2 is supplied to the blast furnace vent 3 through the pulverized coal injection branch pipe 9 when the pulverized coal injection branch pipe control valve 6 is opened. The weighing machine 4 of the pulverized coal conveying hopper 1 measures the weight of pulverized coal charged into the pulverized coal conveying hopper 1, and calculates the pulverized coal conveying quantity from the measured weight change of the pulverized coal. The weighing machine 5 of the injection hopper 2 measures the weight of pulverized coal charged into the injection hopper 2. The pulverized coal injection branch pipe control valve 6 is installed in the pulverized coal injection branch pipe 9 and controls the pulverized coal injection amount based on the value obtained by dividing the pulverized coal injection set value SV by the branch water quantity. The pulverized coal injection branch pipe flow meter 7 is installed in the pulverized coal injection branch pipe 9 at the rear end side of the pulverized coal injection branch pipe control valve 6 to measure the amount of pulverized coal injection into the blast furnace.

도 3은 본 발명의 일 실시예에 따른 고로 미분탄 취입량 보정방법의 순서도이다. 이하에서는 도 1 내지 도 3을 참조하여 본 발명의 고로 미분탄 취입량 보정방법을 설명한다.3 is a flow chart of the blast furnace fine coal injection amount correction method according to an embodiment of the present invention. Hereinafter, the blast furnace fine coal injection amount correction method of the present invention will be described with reference to FIGS. 1 to 3.

고로 미분탄의 이송 및 취입 공정이 개시되면, 우선 미분탄 이송 호퍼 평량기(4)에서는 미분탄 이송량을 측정하고(S1), 인젝션 호퍼 평량기(5)에서는 인젝션 호퍼의 미분탄 중량을 측정하고(S2), 미분탄 취입 지관 유량계(6)에서는 미분탄 취입량을 측정한다(S3). 표시부(13)에서는 미분탄 이송량과 미분탄 취입량, 그리고 인젝션 호퍼의 미분탄 중량 등의 정보들을 화면으로 표시함으로써 조업자가 실시간으로 조업 이상 유무를 확인할 수 있다.When the pulverized coal conveying and blowing process is started, first, the pulverized coal conveying hopper weighing machine 4 measures the pulverized coal conveying amount (S1), and the injection hopper weighing machine 5 measures the pulverized coal weight of the injection hopper (S2), The pulverized coal injection branch pipe flow meter 6 measures the pulverized coal injection amount (S3). The display unit 13 displays information such as the pulverized coal feed amount, the pulverized coal injection amount, and the pulverized coal weight of the injection hopper on the screen so that the operator can check whether there is an abnormal operation in real time.

제어부(11)는 상기 미분탄 이송 호퍼 평량기(4)에서 측정된 미분탄 이송량 데이터와, 상기 미분탄 취입 지관 유량계(6)에서 측정된 미분탄 취입량 데이터를 입력받아 저장한다.The control unit 11 receives and stores the pulverized coal feed amount data measured by the pulverized coal transfer hopper weighing machine 4 and the pulverized coal injection amount data measured by the pulverized coal injection branch pipe flow meter 6.

그리고 제어부(11)는 인젝션 호퍼 평량기(5)에서 측정된 미분탄 중량 데이터를 입력받아 저장하고, 설정된 시간(Ts)동안 미분탄 중량 데이터의 변화량을 계산하여 이를 I/H 변화량으로 설정한다(S4). I/H 변화량은 인젝션 호퍼 평량기(5)에 의하여 측정개시시점(T)에서 측정된 미분탄 중량에서 인젝션 호퍼 평량기(5)에 의하여 측정종료시점(T+Ts)에서 측정된 미분탄 중량을 뺀 값으로 설정된다.In addition, the control unit 11 receives and stores the pulverized coal weight data measured by the injection hopper weighing machine 5, calculates the change amount of the pulverized coal weight data for a set time Ts and sets it as the I / H change amount (S4). . The change in I / H is obtained by subtracting the pulverized coal weight measured at the end point of measurement (T + Ts) by the injection hopper basis weight (5) from the pulverized coal weight measured at the start point of measurement (T) by the injection hopper weighing machine (5). It is set to a value.

그리고 제어부(11)는 하기의 식 1에 따라 편차값을 계산한다(S5).In addition, the controller 11 calculates a deviation value according to Equation 1 below (S5).

편차값 = (미분탄 이송량 + I/H 변화량) / 미분탄 취입량 ----- 식 1Deviation Value = (Pulverized Coal Transport + I / H Change) / Pulverized Coal Blow ----- Equation 1

편차값은 미분탄 취입 지관 유량계에서 측정한 유량값, 즉 유량계 보정 전의 미분탄 취입량을 보정하여 보다 정확한 미분탄 취입량을 산출하기 위하여 계산되는 값이다.The deviation value is a value calculated in order to calculate a more accurate pulverized coal injection amount by correcting the pulverized coal injection amount before the flowmeter correction, that is, the flow rate value measured by the pulverized coal injection branch pipe flow meter.

상기 식 1에 의하여 편차값이 산출되면, 제어부(11)는 하기 식 2에 의하여 보정값을 산출한다(S6).When the deviation value is calculated by the above equation 1, the control unit 11 calculates the correction value by the following equation (2) (S6).

보정값 = {(편차값×보정값2×K)+(보정값3+보정값2)}/(K+2) ----- 식 2Correction value = {(deviation value × correction value 2 × K) + (correction value 3 + correction value 2)} / (K + 2) ----- Equation 2

상기 보정값2는 과거에 보정값으로 저장되어 있었던 값, 보정값3은 과거에 보정값2로 저장되어 있었던 값, K는 보정상수이다.The correction value 2 is a value previously stored as a correction value, the correction value 3 is a value previously stored as a correction value 2, and K is a correction constant.

상기와 같이 보정값을 산출하는 이유는 설정된 시간마다 새로운 보정값을 산출하여 미분탄 취입 지관 유량계에 의해 측정된 미분탄 취입량을 보정함에 있어서, 설정된 시간마다 새로이 산출되는 보정값의 변화 폭이 급격하게 커짐으로 인해 제어가 불안정해지는 것을 방지하기 위함이다.The reason for calculating the correction value as described above is to calculate a new correction value every set time and to correct the pulverized coal injection amount measured by the pulverized coal injection branch pipe flow meter, and the change width of the newly calculated correction value increases rapidly every set time. This is to prevent the control from becoming unstable.

보정상수 K는 미분탄 이송 및 취입을 제어하는 제어부에 미리 설정되어 있는 값으로서, 현재 연산된 편차값의 반영비율을 높이기 위해서는 K 값을 크게 설정하고, 보정값의 변화 폭을 줄여 안정적인 제어를 수행하기 위해서는 K 값을 작게 설정한다. 보정상수 K는 조업자가 입력부(12)를 통해 입력할 수 있다.The correction constant K is a value that is set in advance in the control unit that controls the pulverized coal transfer and blowing.To increase the reflectance ratio of the currently calculated deviation value, set a large K value and decrease the variation width of the correction value to perform stable control. To do this, set the K value small. The correction constant K can be input by the operator through the input unit 12.

제어부(11)는 새로운 편차값이 산출될 때마다 기존 저장된 보정값3의 값은 삭제하고, 기존 저장된 보정값2의 값을 보정값3으로 갱신하여 저장하며, 기존 저장된 보정값1의 값을 보정값2로 갱신하여 저장하고, 편차값과 갱신된 보정값2와 갱신된 보정값3으로부터 새로운 보정값을 산출하여 저장한다(S7).The controller 11 deletes the value of the previously stored correction value 3 whenever the new deviation value is calculated, updates the value of the previously stored correction value 2 with the correction value 3 and stores the correction value 3, and corrects the value of the previously stored correction value 1. The value 2 is updated and stored, and a new correction value is calculated and stored from the deviation value, the updated correction value 2 and the updated correction value 3 (S7).

새로 산출된 보정값은 미분탄 취입 지관 유량계(6)를 보정하는데 활용된다. 즉 제어부(11)에서는 미분탄 취입 지관 유량계(6)의 유량값에 보정값을 곱한 값을 새로운 미분탄 취입량으로 설정하며, 이와 같이 새로 설정된 미분탄 취입량과 제반 조업상황을 고려하여 결정된 미분탄의 취입설정값으로부터 미분탄 취입 지관 컨트롤 밸브(6)의 제어명령값을 산출하여 PID 제어를 수행한다(S8). 또한 제어부(11)는 미분탄 이송량과 미분탄의 이송설정값으로부터 미분탄 이송 컨트롤 밸브(10)의 제어명령값을 산출하여 PID 제어를 수행한다.The newly calculated correction value is utilized to correct the pulverized coal blown branch pipe flow meter 6. That is, the control unit 11 sets the value obtained by multiplying the flow rate value of the pulverized coal injection branch pipe flow meter 6 into the new pulverized coal injection amount, and thus setting the injection of pulverized coal determined in consideration of the newly set pulverized coal injection amount and various operating conditions. PID control is performed by calculating the control command value of the pulverized coal injection branch pipe control valve 6 from the value (S8). In addition, the control unit 11 calculates the control command value of the pulverized coal feed control valve 10 from the pulverized coal feed amount and the pulverized coal feed set value to perform PID control.

따라서 전술한 바와 같은 고로 미분탄 취입량 보정방법에 의하면 미분탄 이송 호퍼의 평량기에서 측정된 미분탄 이송량과 인젝션 호퍼의 평량기에서 측정된 미분탄 중량과 미분탄 취입 지관의 유량계에서 측정된 유량값으로부터 미분탄 취입 지관의 유량계를 보정하여 정확한 미분탄 취입량을 산출함으로써 미분탄의 이송 및 취입 제어를 안정적으로 수행할 수 있다.Therefore, according to the blast furnace pulverized coal injection amount correction method as described above, the pulverized coal injection branch is measured from the pulverized coal transfer amount measured in the weighing machine of the pulverized coal transfer hopper, the pulverized coal weight measured in the weighing machine of the injection hopper and the flow rate value measured in the flow meter of the pulverized coal injection branch pipe. By calibrating the flowmeter of to calculate the fine pulverized coal injection amount, it is possible to stably carry out the control of feeding and blowing pulverized coal.

또한 미분탄 취입 지관 유량계에서 산출하는 유량값은 고로 풍구로 취입되는 미분탄의 종류에 따라 다르게 산출되는데, 본 발명에서는 미분탄 취입 지관 유량계의 유량값, 즉 유량계 보정 전의 미분탄 취입량에 대한 미분탄 이송량과 인젝션 호퍼 중량 변화량의 비율로부터 유량계 보정을 수행하여 정확한 미분탄 이송량을 산출할 수 있어 미분탄의 종류가 변화되는 경우에 있어서도 미분탄의 이송 및 취입 제어를 원활히 수행할 수 있다.In addition, the flow rate value calculated by the pulverized coal injection branch pipe flow meter is differently calculated according to the type of pulverized coal injected into the blast furnace blast furnace. It is possible to calculate the fine pulverized coal transfer amount by performing a flowmeter correction from the ratio of the weight change amount, so that even when the type of pulverized coal is changed, the pulverized coal transfer and blowing control can be smoothly performed.

1: 미분탄 이송 호퍼 2: 인젝션 호퍼 3: 고로 풍구
4: 미분탄 이송 호퍼 평량기 5: 인젝션 호퍼 평량기 6: 미분탄 취입 지관 컨트롤 밸브
7: 미분탄 취입 지관 유량계 8: 미분탄 이송 라인 9: 미분탄 취입 지관
10: 미분탄 이송 컨트롤 밸브 11: 제어부 12: 입력부
13: 표시부1: pulverized coal transfer hopper 2: injection hopper 3: blast furnace vent
4: pulverized coal transfer hopper weighing machine 5: injection hopper weighing machine 6: pulverized coal blown branch pipe control valve
7: pulverized coal injection branch pipe 8: pulverized coal transfer line 9: pulverized coal injection branch pipe
10: pulverized coal transfer control valve 11: control unit 12: input unit
13: display

Claims (4)

미분탄 이송 호퍼의 평량기에서 측정된 미분탄 이송량과, 상기 미분탄 이송 호퍼로부터 미분탄이 공급되는 인젝션 호퍼에서 측정된 미분탄 중량의 변화량으로부터 상기 인젝션 호퍼에서 고로 풍구로 미분탄을 취입하도록 된 미분탄 취입 지관의 유량계에 의하여 측정된 유량값을 보정하기 위한 보정값을 산출하고, 미분탄 취입 지관의 유량계에 의하여 측정된 유량값에 상기 보정값을 반영하여 미분탄 취입량을 산출하는 고로 미분탄 취입량 보정방법.From the pulverized coal feed branch measured in the weighing machine of the pulverized coal transfer hopper and the change in the pulverized coal weight measured in the injection hopper supplied with the pulverized coal from the pulverized coal transfer hopper, the pulverized coal intake pipe was blown into the blast furnace vent in the injection hopper. The pulverized coal injection quantity correction method of calculating the pulverized coal injection amount by calculating the correction value for correcting the flow volume value measured by this, and reflecting the said correction value to the flow value measured by the flowmeter of the pulverized coal injection branch pipe. 청구항 1에 있어서,
미분탄 이송 호퍼의 평량기에서 미분탄 이송량을 측정하는 단계와;
상기 미분탄 이송 호퍼로부터 미분탄이 공급되는 인젝션 호퍼의 평량기에서 미분탄 중량을 측정하는 단계와;
상기 인젝션 호퍼로부터 고로 풍구로 미분탄을 취입하도록 된 미분탄 취입 지관의 유량계에서 미분탄 취입량을 측정하는 단계와;
설정된 시간동안 측정된 상기 미분탄 중량의 변화량을 계산하는 단계와;
설정된 시간동안 측정된 미분탄 취입량에 대한 미분탄 이송량과 미분탄 중량의 변화량의 비로부터 편차값을 산출하는 단계와;
산출된 편차값으로부터 상기 미분탄 취입 지관의 유량계를 교정하기 위한 보정값을 산출하고, 상기 미분탄 취입 지관의 유량계에서 측정된 유량값에 상기 보정값을 반영한 값을 미분탄 취입량으로 하는 미분탄 취입 지관의 유량계 교정단계;
를 포함하여 이루어지는 고로 미분탄 취입량 보정방법.The method according to claim 1,
Measuring the pulverized coal transfer amount in the weighing machine of the pulverized coal transfer hopper;
Measuring the pulverized coal weight in the weighing machine of the injection hopper supplied with pulverized coal from the pulverized coal transfer hopper;
Measuring the pulverized coal injection amount in the flow meter of the pulverized coal injection branch pipe which is to blow the pulverized coal into the blast furnace vent from the injection hopper;
Calculating a change amount of the pulverized coal weight measured during the set time;
Calculating a deviation value from the ratio of the pulverized coal feed amount and the pulverized coal weight change to the pulverized coal injection amount measured during the set time;
The flowmeter of the pulverized coal injection branch pipe which calculates the correction value for calibrating the flowmeter of the pulverized coal injection branch pipe from the calculated deviation value, and makes the value which reflected the correction value in the flow rate value measured by the flowmeter of the pulverized coal injection branch pipe as the pulverized coal injection branch pipe Calibration step;
The blast furnace fine coal injection amount correction method comprising a. 청구항 2에 있어서,
상기 편차값은 하기의 식 1에 의하여 산출하는 고로 미분탄 취입량 보정방법.
편차값 = (미분탄 이송량 + I/H 변화량) / 미분탄 취입량 ----- 식 1
상기 I/H 변화량은 인젝션 호퍼에 의하여 T시점에서 측정된 미분탄 중량에서 인젝션 호퍼에 의하여 T+Ts시점에서 측정된 미분탄 중량을 뺀 값, 상기 Ts는 설정된 시간을 의미한다.The method according to claim 2,
The deviation value is blast furnace coal injection amount correction method calculated by the following equation 1.
Deviation Value = (Pulverized Coal Transport + I / H Change) / Pulverized Coal Blow ----- Equation 1
The I / H change amount is a value obtained by subtracting the pulverized coal weight measured at the T + Ts point by the injection hopper from the pulverized coal weight measured at the T point by the injection hopper, and Ts means a set time. 청구항 3에 있어서,
하기의 식 2에 의하여 보정값을 산출하는 고로 미분탄 취입량 보정방법.
보정값 = {(편차값×보정값2×K)+(보정값3+보정값2)}/(K+2) ----- 식 2
상기 보정값2는 과거에 보정값으로 저장되어 있었던 값, 보정값3은 과거에 보정값2로 저장되어 있었던 값, K는 보정상수이다.The method according to claim 3,
A blast furnace fine coal injection amount correction method for calculating a correction value according to the following Equation 2.
Correction value = {(deviation value × correction value 2 × K) + (correction value 3 + correction value 2)} / (K + 2) ----- Equation 2
The correction value 2 is a value previously stored as a correction value, the correction value 3 is a value previously stored as a correction value 2, and K is a correction constant.
KR1020100135975A 2010-12-27 2010-12-27 Method for correcting injection amount of a pulverized coal into blow furnace KR101177040B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100135975A KR101177040B1 (en) 2010-12-27 2010-12-27 Method for correcting injection amount of a pulverized coal into blow furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100135975A KR101177040B1 (en) 2010-12-27 2010-12-27 Method for correcting injection amount of a pulverized coal into blow furnace

Publications (2)

Publication Number Publication Date
KR20120074034A true KR20120074034A (en) 2012-07-05
KR101177040B1 KR101177040B1 (en) 2012-08-24

Family

ID=46708304

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100135975A KR101177040B1 (en) 2010-12-27 2010-12-27 Method for correcting injection amount of a pulverized coal into blow furnace

Country Status (1)

Country Link
KR (1) KR101177040B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103882165A (en) * 2012-12-24 2014-06-25 上海梅山钢铁股份有限公司 Calculation method for coal injection amount of blast furnace
KR20190035211A (en) * 2017-09-26 2019-04-03 주식회사 포스코 Device for reducing deviation of pulverized coal flow, and the method
CN115788669A (en) * 2022-10-31 2023-03-14 重庆长安汽车股份有限公司 Crankcase ventilation system diagnosis method, device, equipment and storage medium

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004300504A (en) 2003-03-31 2004-10-28 Nisshin Steel Co Ltd Method for controlling heat load in circumferential direction of blast furnace in blowing of pulverized fine coal
JP4537953B2 (en) 2005-12-28 2010-09-08 新日本製鐵株式会社 Control method of pulverized coal injection to blast furnace and its control device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103882165A (en) * 2012-12-24 2014-06-25 上海梅山钢铁股份有限公司 Calculation method for coal injection amount of blast furnace
KR20190035211A (en) * 2017-09-26 2019-04-03 주식회사 포스코 Device for reducing deviation of pulverized coal flow, and the method
WO2019066162A1 (en) * 2017-09-26 2019-04-04 주식회사 포스코 Pulverized coal flow rate deviation reduction apparatus and method therefor
CN115788669A (en) * 2022-10-31 2023-03-14 重庆长安汽车股份有限公司 Crankcase ventilation system diagnosis method, device, equipment and storage medium
CN115788669B (en) * 2022-10-31 2024-05-03 重庆长安汽车股份有限公司 Crankcase ventilation system diagnosis method, device, equipment and storage medium

Also Published As

Publication number Publication date
KR101177040B1 (en) 2012-08-24

Similar Documents

Publication Publication Date Title
KR101177040B1 (en) Method for correcting injection amount of a pulverized coal into blow furnace
CN101560599B (en) Thickness control method and control system of mixed material layer
JP6139763B1 (en) Powder parallel blowing system and powder parallel blowing method
CN110286608B (en) Dynamic compensation processing system and method for raw coal bunker
JP2742001B2 (en) Pulverized coal injection control method
CN209010580U (en) Walking beam furnace stokehold positions online correcting device
JP4537953B2 (en) Control method of pulverized coal injection to blast furnace and its control device
KR100843837B1 (en) Apparatus for controlling input of fine coal using air density
JP2012219343A (en) Weighed value correction method, pulverized coal injection amount estimating method and pulverized coal injection amount estimating device
JP6686843B2 (en) Powder injection method
JP2002302707A (en) Method for correcting influence coefficient applied into measured weight correction in parallel bunkers for bell-less blast furnace
CN113005249A (en) Pulverized coal injection stability control system
KR20040011190A (en) Apparatus for controling pressure and air flow of feed hopper for feeding pulverizer coal
JP2000309812A (en) Method for controlling pulverized fine coal level in coal bin in pulverized fine coal blowing equipment in blast furnace
KR20200125071A (en) Apparatus for guiding stop of the ignition on furnace and control method thereof
JP2742000B2 (en) Pulverized coal injection control method
CN105695648B (en) A kind of control method for pressure balance of bf coal injection system
KR101553150B1 (en) Method for controlling air fuel ratio of tundish and apparatus thereof
JPH0587464A (en) Controlling method for sintering completion point in sintering machine
KR101176018B1 (en) Method for regulating temperature of furance in blast furnace process
KR101023118B1 (en) Apparatus for supplying pulverized coal of feed-hopper
KR101587660B1 (en) Apparatus for controlling pulverized coal injection
KR101388314B1 (en) Controlling method for injecting pulverized coal inblast furnace
JP2007204179A (en) Powder level control method and device
KR100920641B1 (en) An apparatus for controlling the injected oxygen according to deviation of feed dust coal

Legal Events

Date Code Title Description
A201 Request for examination
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20150818

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20160822

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20170821

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20180712

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20190730

Year of fee payment: 8