KR100925997B1 - Apparatus for controlling the quantity of air supplying to pulverizer mill - Google Patents

Apparatus for controlling the quantity of air supplying to pulverizer mill Download PDF

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KR100925997B1
KR100925997B1 KR1020020083654A KR20020083654A KR100925997B1 KR 100925997 B1 KR100925997 B1 KR 100925997B1 KR 1020020083654 A KR1020020083654 A KR 1020020083654A KR 20020083654 A KR20020083654 A KR 20020083654A KR 100925997 B1 KR100925997 B1 KR 100925997B1
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coal
flow rate
signal
signal generator
pulverized coal
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KR1020020083654A
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Korean (ko)
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KR20040056916A (en
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박경한
임형양
김효식
심대현
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주식회사 포스코
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C25/00—Control arrangements specially adapted for crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group

Abstract

본 발명은 미분탄분쇄기에 공급되는 공기유량 제어장치에 관한 것으로서, 보다 상세히는, 미분탄분쇄기에 공급되는 공기의 유량이 석탄의 분쇄성에 따라 적절히 조절되는 미분탄분쇄기에 공급되는 공기유량 제어장치에 관한 것이다.The present invention relates to an air flow rate control apparatus supplied to a pulverized coal pulverizer, and more particularly, to an air flow rate control apparatus supplied to a pulverized coal pulverizer in which the flow rate of air supplied to the pulverized coal pulverizer is appropriately adjusted according to the pulverization of coal.

본 발명에 따른 미분탄분쇄기에 공급되는 공기유량 제어장치는, 급탄기(120)에 설치되어 미분탄분쇄기(130)로 공급되는 석탄공급량을 검출하는 급탄검출기(151)로부터 석탄공급량신호를 전달받아 이를 연산한 뒤 유량조절신호를 출력하는 유량조절신호발생기(150); 석탄(100)의 분쇄성에 따른 유입공기의 최저유량에 대한 보정치를 산출한 보정신호를 출력하는 보정신호발생기(160); 영신호를 출력하는 영신호발생기(170); 급탄검출기(151)의 석탄공급량신호를 감지하여 보정신호발생기(160)의 보정신호 또는 영신호발생기(170)의 영신호를 선택하는 전환기(180); 및 전환기(170)에 의해 선택된 신호에 따라 유량조절신호발생기(150)의 유량조절신호를 보정하여 유량조절용 댐퍼(142)로 출력하는 유량보정기(190)를 포함한다.
The air flow rate control device supplied to the pulverized coal pulverizer according to the present invention receives the coal supply amount signal from the coal feed detector 151 which is installed in the coal feeder 120 and detects the amount of coal supplied to the pulverized coal crusher 130 and calculates it. A flow control signal generator 150 for outputting a flow control signal; A correction signal generator 160 for outputting a correction signal for calculating a correction value for the minimum flow rate of the inflow air according to the crushability of the coal 100; A zero signal generator 170 for outputting a zero signal; A switching unit 180 for detecting a coal supply signal of the coal feed detector 151 and selecting a correction signal of the correction signal generator 160 or a zero signal of the zero signal generator 170; And a flow rate corrector 190 for correcting the flow rate control signal of the flow rate control signal generator 150 according to the signal selected by the converter 170 and outputting the flow rate control damper 142.

미분탄, 미분탄분쇄기, 공기유량제어, 석탄분쇄성Pulverized coal, Pulverized coal pulverizer, Air flow control, Coal pulverization

Description

미분탄분쇄기에 공급되는 공기유량 제어장치{Apparatus for controlling the quantity of air supplying to pulverizer mill} Apparatus for controlling the quantity of air supplying to pulverizer mill}             

도 1은 종래의 미분탄분쇄기에 공급되는 공기유량제어장치를 나타내는 개략도.1 is a schematic view showing an air flow rate control device supplied to a conventional pulverized coal mill.

도 2는 본 발명에 따른 미분탄분쇄기에 공급되는 공기유량제어장치를 나타내는 개략도.Figure 2 is a schematic diagram showing an air flow rate control device supplied to the pulverized coal mill according to the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

100...석탄 120...급탄기100 ... coal 120 ...

130...미분탄분쇄기 142...유량조절용 댐퍼130 ... Pulverized coal crusher 142 ... Flow control damper

150...유량조절신호발생기 151...급탄검출기150 Flow control signal generator 151 Coal detector

160...보정신호발생기 170...영신호발생기160 ... calibration signal generator 170 ... zero signal generator

180...전환기 190...유량보정기
180 ... Switcher 190 ... Flow Compensator

본 발명은 미분탄분쇄기에 공급되는 공기유량 제어장치에 관한 것으로서, 보다 상세히는, 미분탄분쇄기에 공급되는 공기의 유량이 석탄의 분쇄성에 따라 적절히 조절되는 공기유량 제어장치에 관한 것이다.The present invention relates to an air flow rate control device supplied to a pulverized coal pulverizer, and more particularly, to an air flow rate control device in which the flow rate of air supplied to the pulverized coal pulverizer is appropriately adjusted according to the pulverization property of coal.

일반적으로, 미분탄을 제조하기 위해서는, 도 1에서 도시된 바와 같이, 가공하지 않은 석탄(1)을 임시로 저장하는 저장조(10)와, 저장조(10)의 하부측에 연통되도록 장착되고 저장조(10)로부터 공급받은 석탄(1)을 이송시키는 이송컨베어(21)가 내측에 설치된 급탄기(20) 및 급탄기(20)의 하부측에 장착되어 급탄기(20)로부터 공급되는 석탄(1)을 잘게 분쇄하는 미분탄분쇄기(30)를 포함하여 구성된다.In general, in order to manufacture pulverized coal, as shown in FIG. 1, a storage tank 10 temporarily storing raw coal 1 and a storage tank 10 mounted to communicate with a lower side of the storage tank 10. The conveying conveyor 21 for conveying the coal 1 supplied from the (1) is installed on the lower side of the feeder 20 and the feeder 20 installed inside the coal (1) supplied from the feeder 20 It comprises a pulverized pulverized pulverizer (30).

이 중 미분탄분쇄기(30)는, 상부에 급탄기(20)로부터 석탄(1)을 공급받기 위해 설치되는 일정직경을 가지는 중공의 슈트(31)와, 슈트(31)로부터 낙하하는 석탄(1)이 쌓이도록 회전가능하게 설치되는 회전테이블(32)과, 회전테이블(32) 위에 쌓인 석탄(1)을 분쇄하도록 회전테이블(32)의 상부에 지지되는 분쇄롤러(33)를 구비한다.Among them, the pulverized coal pulverizer 30 includes a hollow chute 31 having a constant diameter and a coal 1 falling from the chute 31 having a predetermined diameter installed thereon to receive the coal 1 from the feeder 20. The rotary table 32 is rotatably installed so as to accumulate, and a grinding roller 33 supported on the upper portion of the rotary table 32 to crush coal 1 stacked on the rotary table 32.

분쇄롤러(33)에 의해 분쇄된 미분탄(1)은 회전테이블(32)의 가장자리를 따라 설치된 다수의 포트(34)로부터 분출되는 유입공기에 의해 상부로 이동되며, 미분탄분쇄기(30)의 상부에 설치된 조분분리기(35)를 통해 미분탄 저장호퍼(미도시)와 버너(미도시)로 방출된다.The pulverized coal 1 pulverized by the pulverizing roller 33 is moved upward by inflow air blown out from a plurality of ports 34 installed along the edge of the rotary table 32, and is placed on top of the pulverized coal pulverizer 30. The pulverized coal storage hopper (not shown) and the burner (not shown) are discharged through the installed coarse powder separator 35.

유입공기는, 외부로부터 유입된 냉풍과 미분탄 저장호퍼의 연소가스와 열교환된 열풍이 온도조절용 댐퍼들(14)에 의해 적절히 혼합된 혼합공기로서, 유량조절용 댐퍼(42)에 의해 적정량으로 조절된 후, 각 포트(34)의 하부에 형성된 공기실(36)과 연결된 공기공급관(43)을 통해 미분탄분쇄기(30) 내부로 유입된다.The inlet air is mixed air in which cold air introduced from the outside and hot air heat-exchanged with the combustion gas of the pulverized coal storage hopper are properly mixed by the temperature control dampers 14, and after being adjusted to an appropriate amount by the flow control damper 42. The pulverized coal pulverizer 30 is introduced into the pulverized coal crusher 30 through an air supply pipe 43 connected to the air chamber 36 formed at the lower portion of each port 34.

유입공기의 유입과정에서 이루어지는 유입공기에 대한 온도조절 및 유입량에 대한 제어는, 급탄기(20)의 일측에 설치된 급탄검출기(51)와 연결되어 급탄기(20)로부터 미분탄분쇄기(30)로 공급되는 석탄(1)의 공급을 제어하는 제어장치(50)에 의해 이루어지는데, 이 제어장치(50)는, 급탄검출기(51)로부터 석탄(1)공급량 신호를 전달받아 이를 연산한 뒤 유량조절용 댐퍼(42)로 유량조절신호를 보내어 유량조절용 댐퍼(42)의 작동을 제어하도록 되어있다.Temperature control and inflow control for the inlet air made in the inflow process of the inlet air is connected to the coal detector 51 installed on one side of the coal feeder 20 and supplied from the coal feeder 20 to the pulverized coal crusher 30. The control device 50 controls the supply of coal 1 to be supplied. The control device 50 receives the coal 1 supply amount signal from the coal feed detector 51, calculates the supply amount signal, and calculates the damper for flow control. A flow control signal is sent to 42 to control the operation of the flow control damper 42.

상기 제어장치(50)는 미분탄분쇄기(30)로 공급되는 석탄(1)의 공급량에 비례하여 유입공기의 유입량을 조절하도록 프로그램되어 있으며, 포트(34)의 내부로 미분탄(1)이 낙하되는 것을 방지하기 위하여 석탄공급량이 일정량 이하일 경우 최소의 유량의 공기가 포트(34)로 공급되도록 설정되어 있다.The control device 50 is programmed to adjust the inflow of the inflow air in proportion to the supply amount of the coal (1) supplied to the pulverized coal crusher (30), it is that the pulverized coal (1) falls into the port 34 In order to prevent the coal supply amount is set to be supplied to the port 34 of the minimum flow rate when the amount is less than a certain amount.

그러나, 석탄공급량에 의해서 유입공기의 유량제어가 이루어지는 종래의 제어장치(50)는 석탄공급량이 일정량 이하인 경우 다음의 문제점을 가진다.However, the conventional control device 50 in which the flow rate of the inlet air is controlled by the coal supply amount has the following problem when the coal supply amount is less than a predetermined amount.

석탄공급량이 일정량 이하에서 석탄(1)의 분쇄성이 불량한 경우, 제어장치(50)에 의해 최소의 유량으로 포트(34)로 공급되는 유입공기로는, 분출압이 낮아 포트(34) 내로 낙하되는 중량이 큰 석탄(1)들을 차단하지 못하는 문제점이 있다. 입자가 큰 석탄(1)들이 포트(34) 내에 쌓이게 되면 포트(34)가 막혀 미분탄(1)들이 미분탄 저장호퍼와 버너로 방출되지 못하게 된다.If the coal supply amount is poor in the pulverization of the coal 1 at a predetermined amount or less, the inlet air supplied to the port 34 by the controller 50 at the minimum flow rate by the control device 50 has a low ejection pressure and falls into the port 34. There is a problem that can not block the heavy coal (1). When the large coal 1 accumulates in the port 34, the port 34 is blocked so that the pulverized coal 1 is not discharged to the pulverized coal storage hopper and burner.

또한, 석탄공급량이 일정량 이하에서 석탄(1)의 분쇄성이 양호한 경우, 제어장치(50)에 의해 설정된 최소 유량의 유입공기는 오히려 미분탄분쇄기(30) 내로 필 요 이상의 유입공기를 공급하는 결과가 되며 이에 따라, 연소화염의 자기지지 능력이 저하되고, 연소 안정역이 좁아져 운용면에 제약을 주는 문제가 발생한다.
In addition, when the coal supply amount is less than a certain amount of pulverization of the coal (1), the inlet air of the minimum flow rate set by the control device 50, rather than supplying the inlet air more than necessary into the pulverized coal mill 30 Accordingly, the self-supporting capacity of the combustion flame is lowered, and the combustion stability zone is narrowed, which causes a problem of limiting the operating surface.

본 발명은, 상기와 같은 문제점들을 해소하기 위해 이루어진 것으로서, 석탄공급량이 적을 경우, 제어장치에 의해 미리 설정된 최소 유량으로 유입공기가 미분탄분쇄기 내로 공급됨으로써 발생되는 유입공기의 과잉공급 현상 및 유입공기의 유량부족으로 인한 포트로의 미분탄 낙하현상이 방지되는 미분탄분쇄기에 공급되는 공기유량 제어장치의 제공을 목적으로 한다.
The present invention has been made to solve the above problems, when the amount of coal supply is small, the excessive supply phenomenon of the inlet air and inlet air generated by the inlet air is supplied into the pulverized coal mill at a minimum flow rate set in advance by the control device An object of the present invention is to provide an air flow rate control device supplied to a pulverized coal pulverizer in which pulverized coal falls to a port due to insufficient flow rate.

상기 목적을 달성하기 위하여, 본 발명은, 급탄기에 설치되어 미분탄분쇄기로 공급되는 석탄의 공급량을 검출하는 급탄검출기로부터 석탄공급량신호를 전달받아 이를 연산한 뒤 유량조절신호를 출력하는 유량조절신호발생기;In order to achieve the above object, the present invention, the flow control signal generator for receiving a coal supply signal from the coal supply detector for detecting the supply of coal supplied to the pulverized coal mill is installed in the coal feeder and outputs a flow control signal;

석탄의 분쇄성에 따른 유입공기의 최저유량에 대한 보정치를 산출한 보정신호를 출력하는 보정신호발생기;A correction signal generator for outputting a correction signal for calculating a correction value for a minimum flow rate of inflow air according to the pulverization of coal;

영신호를 출력하는 영신호발생기;A zero signal generator for outputting a zero signal;

급탄검출기의 석탄공급량신호를 감지하여 보정신호발생기의 보정신호 또는 영신호발생기의 영신호를 선택하는 전환기; 및A switch for detecting a coal supply signal of the coal feed detector and selecting a correction signal of the correction signal generator or a zero signal of the zero signal generator; And

전환기에 의해 선택된 신호에 따라 유량조절신호발생기의 유량조절신호를 보 정하여 공기공급관의 유량조절용 댐퍼로 출력하는 유량보정기를 포함한다.And a flow compensator for correcting the flow control signal of the flow control signal generator according to the signal selected by the converter and outputting the flow control signal to the flow control damper of the air supply pipe.

본 발명의 특징 및 이점들은 첨부도면에 의거한 다음의 상세한 설명으로 더욱 명백해질 것이다.The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

도 2에 도시된 바와 같이, 본 발명에 적용되는 미분탄(100)을 제조하기 위한 장치로는 석탄(100)을 임시로 저장하는 저장조(110)와, 저장조(110)로부터 공급받은 석탄(100)을 미분탄분쇄기(130)로 공급하는 급탄기(120)와, 급탄기(120)로부터 공급받은 석탄(100)을 분쇄하는 미분탄분쇄기(130)가 구비된다.As shown in FIG. 2, the apparatus for manufacturing pulverized coal 100 applied to the present invention includes a storage tank 110 for temporarily storing coal 100 and coal 100 supplied from the storage tank 110. It is provided with a coal feeder 120 for supplying to the pulverized coal mill 130, and a pulverized coal mill 130 for pulverizing the coal (100) supplied from the coal feeder (120).

상기 장치들은, 종래의 미분탄 제조설비와 동일한 구성 및 기능을 가지므로 여기서의 상세한 설명은 생략한다.Since the devices have the same configuration and function as the conventional pulverized coal production equipment, detailed description thereof will be omitted.

유량조절신호발생기(150)는, 급탄기(120)에 설치되어 미분탄분쇄기(130)로 공급되는 석탄(100)의 공급량을 검출하는 급탄검출기(151)로부터 석탄공급량신호를 전달받아 이를 연산한 뒤 유량보정기(190)로 유량조절신호를 출력하여 유량조절용 댐퍼(142)의 작동을 제어한다.The flow rate control signal generator 150 receives the coal supply amount signal from the coal supply detector 151 which detects the supply amount of the coal 100 which is installed in the coal feeder 120 and supplied to the pulverized coal mill 130 and calculates the coal supply amount signal. A flow rate control signal is output to the flow rate corrector 190 to control the operation of the flow control damper 142.

유량조절신호발생기(150)는 미분탄분쇄기(130)로 공급되는 석탄(100)의 공급량에 비례하여 유입공기의 유입량이 조절되는 한편, 포트(134)의 내부로 미분탄(100)이 낙하되는 것이 방지되도록 석탄공급량이 일정량 이하일 경우, 최소유량의 유입공기가 포트(134)로 공급되도록 설정된다.The flow rate control signal generator 150 controls the inflow of inflow air in proportion to the supply amount of the coal 100 supplied to the pulverized coal crusher 130, and prevents the pulverized coal 100 from falling into the port 134. If the coal supply amount is less than a predetermined amount, the inlet air of the minimum flow rate is set to be supplied to the port 134.

보정신호발생기(160)는, 석탄(100)의 분쇄성을 나타내는 석탄성상신호를 감지하여 유량조절신호발생기(150)의 유량조절신호에 따른 유입공기의 최저유량에 대한 보정치를 산출한 후, 그 보정신호를 전환기(180)로 출력한다. The correction signal generator 160 detects a coal phase signal indicating the crushability of the coal 100, calculates a correction value for the minimum flow rate of the inlet air according to the flow rate control signal of the flow rate control signal generator 150, and then The correction signal is output to the converter 180.                     

여기서, 석탄성상신호는 하드글로브 지수(hardgrove grindability index)를 따른다. 하드글로브 지수는, 하드글로브 시험기를 이용하여 규정 조건하에서 검출한 석탄(100)의 분쇄성을 나타낸 수치로서, 석탄(100)의 상대적인 분쇄경도를 백분율로 나타내며 이 지수가 클수록 분쇄되기 쉽다.Here, the coal phase signal follows the hardgrove grindability index. The hard globe index is a numerical value showing the crushability of the coal 100 detected under the prescribed conditions using a hard globe tester, and represents the relative crushing hardness of the coal 100 as a percentage.

따라서, 석탄 성상지수가 크면 석탄(100)의 분쇄성이 양호한 것이므로 보정신호발생기(160)에 의해 산출되는 유입공기의 최저유량에 대한 보정치는 작아지고, 석탄 성상지수가 작으면 석탄(100)의 분쇄성이 불량한 것이므로 유입공기의 최저유량에 대한 보정치는 커지게 된다.Therefore, if the coal property index is large, the coal 100 has good grinding property, and thus the correction value for the minimum flow rate of the inflow air calculated by the correction signal generator 160 is small. If the coal property index is small, the coal 100 Since the grindability is poor, the correction value for the minimum flow rate of the inlet air becomes large.

영신호발생기(170)는 유입공기의 최저유량에 대한 보정치가 존재하지 않는 영신호를 전환기(180)로 출력한다.The zero signal generator 170 outputs a zero signal having no correction value for the minimum flow rate of the inflow air to the converter 180.

보정신호발생기(160)로부터 출력된 보정신호와 영신호발생기(170)로부터 출력된 영신호가 입력되는 전환기(180)는, 석탄공급량신호에 의해 석탄공급량이 설정치 이하라고 판단되면 보정신호발생기(160)의 보정신호를 선택하고, 설정치 이상이라고 판단되면 영신호발생기(170)의 영신호를 선택한다.In the converter 180 in which the correction signal output from the correction signal generator 160 and the zero signal output from the zero signal generator 170 are input, when it is determined that the coal supply amount is less than the set value by the coal supply signal, the correction signal generator 160 is input. When the correction signal is determined to be greater than or equal to the set value, the zero signal of the zero signal generator 170 is selected.

유량보정기(190)는, 전환기(180)에 의해 선택된 신호에 따라 유량조절신호발생기(150)의 유량조절신호를 보정하여 공기공급관의 유량조절용 댐퍼(142)로 출력한다.The flow rate corrector 190 corrects the flow rate control signal of the flow rate control signal generator 150 according to the signal selected by the changer 180 and outputs it to the flow rate control damper 142 of the air supply pipe.

상기와 같이 구성된 본 발명의 미분탄분쇄기에 공급되는 공기유량제어장치에 의해 유입공기의 유량이 제어되는 과정을 살펴보면 다음과 같다.Looking at the process of controlling the flow rate of the inlet air by the air flow rate control device supplied to the pulverized coal pulverizer of the present invention configured as described above are as follows.

급탄기(120)에 설치된 급탄검출기(151)로부터 석탄공급량신호가 유량조절신 호발생기(150)로 입력되면, 유량조절신호발생기(150)는 유량보정기(190)로 유량조절신호를 출력한다.When the coal supply amount signal is input to the flow rate control signal generator 150 from the coal supply detector 151 installed in the feeder 120, the flow rate control signal generator 150 outputs the flow rate control signal to the flow rate corrector 190.

만일, 전환기(180)가 급탄검출기(151)의 석탄공급량신호를 전달받아 미분탄분쇄기(130)로의 석탄공급량이 설정치 이하라고 판단되면, 전환기(180)는, 보정신호발생기(160)의 보정신호를 선택하고, 이 보정신호를 유량보정기(190)로 전달하여 유량보정기(190)에서 이 보정신호를 따라 유량조절신호를 보정한다.When the converter 180 receives the coal supply signal from the coal feed detector 151 and determines that the coal supply to the pulverized coal crusher 130 is less than or equal to the set value, the converter 180 outputs the correction signal of the correction signal generator 160. The correction signal is transmitted to the flow rate corrector 190 and the flow rate corrector 190 corrects the flow control signal according to the correction signal.

이 보정신호발생기(160)는, 석탄(100)의 분쇄성에 따라 유입공기의 최저유량에 대한 보정치를 산출하기 때문에, 종래와 같이, 석탄공급량이 설정치 이하에서 분쇄성이 우수함에도 불구하고 미분탄분쇄기(130) 내로 필요 이상의 유입공기가 공급됨으로써 연소화염의 자기지지 능력이 저하되고, 연소 안정역이 좁아져 운용면에 제약을 주는 현상을 방지할 수 있다.Since the correction signal generator 160 calculates a correction value for the minimum flow rate of the inflow air according to the pulverization property of the coal 100, the pulverized coal pulverizer ( By supplying more inflow air than necessary 130, the self-supporting capacity of the combustion flame is lowered, and the combustion stability zone is narrowed, thereby preventing the phenomenon of limiting the operating surface.

또한, 분쇄성이 불량할 경우, 유량으로 포트(134)로 공급되는 유입공기로는, 분출압이 낮아 포트(134) 내로 낙하되는 중량이 큰 석탄(100)들을 차단하지 못하는 현상을 방지 할 수 있으며 이에 따라, 입자가 큰 석탄(100)들이 포트(134) 내에 쌓이면서 포트(134)가 막혀 미분탄(100)들이 미분탄 저장호퍼(미도시)와 버너(미도시)로 방출이 차단되는 현상이 방지된다.In addition, when the crushability is poor, the inlet air supplied to the port 134 at a flow rate, it is possible to prevent the phenomenon that the blowout pressure is low to block the heavy coal 100 falling into the port 134. Accordingly, coal particles 100 having large particles are accumulated in the port 134 and the port 134 is blocked to prevent the pulverized coal 100 from being discharged to the pulverized coal storage hopper (not shown) and the burner (not shown). do.

한편, 전환기(180)가 미분탄분쇄기(130)로의 석탄공급량이 설정치 이상이라고 판단되면, 전환기(180)는 영신호를 선택하고, 이 영신호를 유량보정기(190)로 전달하여 유량조절신호의 보정이 이루어지지 않도록 한다. 보정이 이루어지지 않은 유량조절신호는 공기공급관의 유량조절용 댐퍼(142)로 전달되어 유량조절용 댐퍼(142)의 작동을 제어한다.
On the other hand, when the converter 180 determines that the amount of coal supplied to the pulverized coal crusher 130 is greater than or equal to the set value, the converter 180 selects a zero signal and transmits the zero signal to the flow compensator 190 to correct the flow control signal. Do not make this happen. The flow rate adjustment signal, which is not corrected, is transmitted to the flow rate control damper 142 of the air supply pipe to control the operation of the flow rate control damper 142.

상기한 바와 같이 미분탄분쇄기에 공급되는 공기유량 제어장치에 따르면, 미분탄분쇄기에 투입된 석탄의 분쇄성에 의한 유입공기의 최저공기 유량에 대한 보정이 이루어지도록 함으로써, 미분탄분쇄기로의 석탄공급량이 기준치 이하로 저하될 경우, 유입공기의 과잉공급 현상으로 인해 미분탄이 공급처에서 연소화염의 자기지지능력이 저하되고, 연소 안정역이 좁아져 운용면에 제약을 주는 현상을 방지할 수 있으며, 유입공기의 유량부족으로 인한 포트로의 미분탄 낙하현상을 방지할 수 있는 효과가 있다.As described above, according to the air flow control device supplied to the pulverized coal pulverizer, the supply of coal to the pulverized coal pulverizer is lowered below the reference value by making correction for the minimum air flow rate of the inlet air due to the pulverization of the coal put into the pulverized coal pulverizer. In this case, the pulverized coal can reduce the self-support capacity of the combustion flame at the supply source due to the excessive supply of inflow air, and the combustion stability zone is narrowed to prevent the restriction on the operating surface. There is an effect that can prevent the pulverized coal falling phenomenon to the port.

Claims (1)

급탄기(120)에 설치되어 미분탄분쇄기(130)로 공급되는 석탄공급량을 검출하는 급탄검출기(151)로부터 석탄공급량신호를 전달받아 상기 석탄공급량에 비례하는 유입공기유량에 관하여 연산한 뒤 유량조절신호를 출력하는 유량조절신호발생기(150);Coal supply amount signal is received from the coal supply detector 151 installed in the coal feeder 120 and detects the coal supply amount supplied to the pulverized coal crusher 130, and the flow rate control signal is calculated based on the inflow air flow proportional to the coal supply amount. Flow control signal generator 150 for outputting the; 석탄(100)의 분쇄성에 따른 유입공기의 최저유량에 대한 보정치를 산출한 보정공기유량에 대한 보정신호를 출력하는 보정신호발생기(160);A correction signal generator 160 for outputting a correction signal for the corrected air flow rate which calculates a correction value for the lowest flow rate of the inflow air according to the crushability of the coal 100; 유입공기의 최저유량에 대한 보정치가 존재하지 않는 영신호를 출력하는 영신호발생기(170);A zero signal generator 170 for outputting a zero signal for which there is no correction value for the lowest flow rate of the inlet air; 상기 급탄검출기(151)의 석탄공급량신호를 감지하여 상기 보정신호발생기(160)의 보정신호 또는 상기 영신호발생기(170)의 영신호를 선택하는 전환기(180); 및A converter 180 for detecting a coal supply signal of the coal supply detector 151 and selecting a correction signal of the correction signal generator 160 or a zero signal of the zero signal generator 170; And 상기 전환기(170)에 의해 선택된 신호에 따라 유량조절신호발생기(150)의 유량조절신호를 보정하여 유량조절용 댐퍼(142)로 출력하는 유량보정기(190)를 포함하는 미분탄분쇄기에 공급되는 공기유량 제어장치.Air flow rate control supplied to the pulverized coal pulverizer including a flow rate corrector 190 for correcting the flow rate control signal of the flow rate control signal generator 150 and outputting it to the flow rate control damper 142 according to the signal selected by the converter 170. Device.
KR1020020083654A 2002-12-24 2002-12-24 Apparatus for controlling the quantity of air supplying to pulverizer mill KR100925997B1 (en)

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Publication number Priority date Publication date Assignee Title
CN105251602A (en) * 2015-11-06 2016-01-20 浙江宜清环境技术有限公司 Pulverized coal concentration adjusting valve for coal mill of coal pulverizing system

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KR880700962A (en) * 1986-02-12 1988-04-13 Micronized solid control system
JP2002320869A (en) * 2001-04-27 2002-11-05 Ube Machinery Corporation Ltd Vertical crusher for producing aggregate
JP2003268394A (en) * 2002-03-18 2003-09-25 Ube Techno Enji Kk Wooden fuel and its production process
JP2003344138A (en) * 2002-05-31 2003-12-03 Nitto Seiko Co Ltd Flow rate measurement system

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KR880700962A (en) * 1986-02-12 1988-04-13 Micronized solid control system
JP2002320869A (en) * 2001-04-27 2002-11-05 Ube Machinery Corporation Ltd Vertical crusher for producing aggregate
JP2003268394A (en) * 2002-03-18 2003-09-25 Ube Techno Enji Kk Wooden fuel and its production process
JP2003344138A (en) * 2002-05-31 2003-12-03 Nitto Seiko Co Ltd Flow rate measurement system

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Publication number Priority date Publication date Assignee Title
CN105251602A (en) * 2015-11-06 2016-01-20 浙江宜清环境技术有限公司 Pulverized coal concentration adjusting valve for coal mill of coal pulverizing system

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