JPS58124514A - Operation of dust collecting system for carrying out centralized dust collection of dust-countaining gas generated in plural places - Google Patents

Abstract

PURPOSE:To such a dust-containing gas efficiently, in sucking the dust-containing gas, by properly controlling the rotation number of a dust collecting blower from the amount of dust-containing sucked gas and pressure drop. in a pipe. CONSTITUTION:In the operational information of a dust generating place, that is, in the dust collection of a casting floor, the tapping state of a tapping port is grasped in addition to the control condition of a gas amount and, is accordance with the grasped state analogue correcting values are added to the sum value of analogue values of each opening terminal end dampers to carry out correction all together. For example, in such a state that 2TH is tapped out while the terminal dampers of a 2TH system are opened and a certain number of terminal dampers among the terminal dampers of a 3TH system are also opened, positive or negative analogue values obtd. from opening numbers of the dampers and operational information are added as correcting values. In setting the number of state, examples of the probable state are prelimiarily prepared to determine the above stated correcting values. In this way, fire disposition is executed on the basis of results of examples which are set carefully.

Description

【発明の詳細な説明】 本発明紘、複数個所で発生する含塵ガスを集中集塵する
集塵系統の運転方法Ｋｌｌするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a method of operating a dust collection system that centrally collects dust-containing gas generated at multiple locations.

複数個所で発生する含塵ガスを集中集塵する集塵系統と
して、鉄鋼業にあってｔｉｗわゆる鋳床集塵と呼ばれる
高炉の鋳床回転から発生する含塵ガスを集中集塵する集
塵系統があシ、高炉の出銑口。As a dust collection system that centrally collects dust-containing gases generated at multiple locations, in the steel industry, it is called TIW dust collection, which centrally collects dust-containing gases generated from the rotating casting bed of a blast furnace. System connection, taphole of blast furnace.

溶銑、溶滓樋、トビードカー等への溶銑落し０等複数個
所で発生する含塵ガスはそれぞれの発生源に集塵口を設
置して集中的に含塵ガスの吸引除去がなされている。Dust-containing gases generated at multiple locations, such as hot metal, slag troughs, and hot metal dripping into tobead cars, are intensively removed by suction by installing dust collection ports at each generation source.

これら含塵ガスの発生のうち、特に出銑口における発生
について述べると、出銑口の開孔、出銑初期、出銑末期
、出銑口閉塞時等でその発生量が大幅に変動する。とζ
ろで従前の代表的鋳床集塵にあっては含塵ガス発生量の
最大値に集塵能力を合せ、上記出銑状線中最大吸引風量
で含塵ガスを吸引除去してい喪。その後本願出願人は特
願昭５６一タコＯｆＩ号によシ従来の鋳床集塵の運転方
法を改曳して、集塵ブロワ−の回転数制御あるいは集塵
系統中それぞれの集塵口に設置された枝管ダンパー制御
を行う集塵系統の運転方法を提案したが、前記出銑状態
における含塵ガス発生量の変動及び他出銃口開孔に伴う
含塵ガス変動の錯綜から、その制御は複雑となって充分
に効果的かつ省エネルギー状態で集塵するまでには至っ
ていない。Of these dust-containing gases, the amount of dust-containing gas generated at the taphole varies greatly depending on the opening of the taphole, the initial stage of tapping, the final stage of tapping, and when the taphole is closed. and ζ
In conventional typical casthouse dust collection using filters, the dust collection capacity was adjusted to the maximum amount of dust-containing gas generated, and the dust-containing gas was removed by suction at the maximum suction air volume in the tap wire. After that, the applicant of the present application modified the conventional operation method of casting bed dust collection in Japanese Patent Application No. 561 Tako OfI, by controlling the rotation speed of the dust collection blower or by controlling the number of dust collection ports in each dust collection port in the dust collection system. We proposed an operating method for the dust collection system that controls the installed branch pipe damper, but due to the complexity of fluctuations in the amount of dust-containing gas generated in the tapping state and other fluctuations in dust-containing gas due to the opening of the outlet port, it was difficult to control the system. However, it has not been possible to collect dust in a sufficiently effective and energy-saving manner due to its complexity.

高炉の鋳床集塵機において、適確な風量制御を行なう九
めには高炉鋳床の複雑な発塵量変化を捉えるため、入口
ダンパ制御の場合には入口ダンパ開度の基準、もしくは
回転数制御の場合には集塵プロワの回転数基準が必要で
ある。この基準を入力させる方法として従来次のような
方法が鋒用されているが、一方これらの方法にはそれぞ
れ以下のような欠点があった。In the case of inlet damper control, the ninth step in performing accurate air volume control in blast furnace castbed dust collectors is to control the inlet damper opening degree or rotation speed in order to capture the complex changes in the amount of dust generated in the blast furnace casthouse. In this case, a rotation speed standard for the dust collection blower is required. Conventionally, the following methods have been used to input this criterion, but each of these methods has the following drawbacks.

（１）　　手動によって基準を入力させる（オペレータ
ー設定）方法。(1) A method of manually inputting criteria (operator setting).

基準設定が不正確かつ主観的であり、過剰風量設定ある
いは設定忘れの恐れがあシ、また上記手動操作は手間の
かかるなどの欠点がある。The standard setting is inaccurate and subjective, there is a risk of setting excessive air volume or forgetting the setting, and the above-mentioned manual operation is time-consuming.

（コ）媒塵量センサー情報を基にして基準を作り出す方
法。(j) A method of creating standards based on dust amount sensor information.

媒塵量センサーは高価であり、信頼性が低く、検出遅れ
が生ずるという致命的欠陥がある。すなわちこの方法、
によれば媒塵量を把握してから風量制御するため制御が
どうしても遅れすぎる。The dust amount sensor is expensive, has low reliability, and has a fatal flaw in that it causes a detection delay. That is, this method
According to the above, since the air volume is controlled after determining the amount of dust particles, the control is inevitably delayed.

（３）　　出銑状況に応じてさらにタイマー等により予
め画一的に数種の集塵ダンパを設定して、これら数種の
パターンを選択して基準を作り出す方法。(3) A method in which several types of dust collection dampers are uniformly set in advance using a timer, etc. according to the tapping situation, and standards are created by selecting these several types of patterns.

この方法によれば、操業条件の変動から風量制御がどう
しても粗雑になり、風量不足あるいは風量過剰になると
いう現象が発生する。According to this method, air volume control inevitably becomes rough due to fluctuations in operating conditions, resulting in insufficient or excessive air volume.

（４Ｉ）適正風量を決定づける種々の情報因子を取込み
、これらの情報の組み合せディジタル演算処理によって
あらゆる情況での適正風量を逐時演算究明する方法。(4I) A method of taking in various information factors that determine the appropriate air volume, and calculating and investigating the appropriate air volume in all situations one by one by digital calculation processing that combines these information.

この方法によれば、精度は非常に高いものが得られるが
、演算が着火なものとなるので演算制御装置が高価とな
るという不利がある。According to this method, very high accuracy can be obtained, but since the calculation is ignited, there is a disadvantage that the calculation and control device becomes expensive.

本発明は、上述の従来方法の有するそれぞれの欠点を除
去改善した集塵系統の運転方法を提供することを目的と
し、特許請求の範囲記載の方法を提供することによって
前記目的を達成することができる。すなわち、本発明は
複数個所で発生する含塵ガスを集塵口、枝管、枝管ダン
パ、母管、集塵ブロワを経て集塵機へ送給する集塵系統
の運転方法において、発塵個所で発生する発塵量から前
記枝管ダンパの開度を定め、ダンパ開度と、その開度に
おける枝管内圧力損失を考慮した制御値を各枝管毎に決
定し、前記枝管ダンパの開・閉信号をもとにして各ダン
パの集計制御値から集塵ブロワの回転数制御を行うと共
に、前記枝管ダンパの開・閉ダンパ数と操業情報を上記
集計制御値の制御因子として上記回転数の調整をさらに
行うことを特徴とする複数個所で発生する含塵ガスを集
中集塵する集塵系統の運転方法に関する。An object of the present invention is to provide a method of operating a dust collection system that eliminates and improves each of the drawbacks of the conventional methods described above, and the above object can be achieved by providing the method described in the claims. can. That is, the present invention provides a method for operating a dust collection system in which dust-containing gas generated at multiple locations is sent to a dust collector via a dust collection port, a branch pipe, a branch pipe damper, a main pipe, and a dust collection blower. The opening degree of the branch pipe damper is determined based on the amount of generated dust, and a control value that takes into account the damper opening degree and the pressure loss within the branch pipe at that opening is determined for each branch pipe, and the opening/opening of the branch pipe damper is The rotation speed of the dust collection blower is controlled from the aggregate control value of each damper based on the closing signal, and the rotation speed is controlled using the number of opening/closing dampers of the branch pipe damper and operation information as control factors for the aggregate control value. The present invention relates to a method of operating a dust collection system that centrally collects dust-containing gas generated at a plurality of locations, the method further comprising adjusting:

次に本発明の詳細な説明する。Next, the present invention will be explained in detail.

本発明者らは、各種情報因子にアナログ値を付加したア
ナログ演算処理技術によってディジタル演算処理に匹適
する結果を得ることのできる前記集塵系統の集塵ブロワ
の回転数制御による集塵系統の運転方法に想到・して本
発明を完成した。本発明を具体的に適用実施している高
炉の鋳床集塵機のメインプロワの回転数制御による風量
制御の丸めの基準入力演算を例にとって以下に説明する
。The present inventors have proposed an operation method of the dust collection system by controlling the rotation speed of the dust collection blower of the dust collection system, which can obtain results comparable to digital calculation processing using analog calculation processing technology that adds analog values to various information factors. The present invention was completed by devising a method. An example of standard input calculation for rounding air volume control based on rotational speed control of the main blower of a blast furnace cast bed dust collector to which the present invention is specifically applied will be described below.

鋳床における発塵量の変化は一般に第７図に示す時間的
経過を辿る。すなわち出銑孔開孔による出銑開始に伴っ
て発塵が上昇し、溶銑が樋中を流下するに伴なって発塵
領域は次第に広がって行くことになる。出銑中期にはほ
ぼ定常的な発塵状態となるが、溶滓比率の増加に伴なっ
て発塵量は再び徐々に上昇して行き、出銑末期のマッド
ガンの閉塞により発塵は急激に上昇しピークに達する。Changes in the amount of dust generated in the casthouse generally follow the time course shown in FIG. That is, the dust generation increases with the start of tapping by opening the tap hole, and as the hot metal flows down in the gutter, the dust generation area gradually expands. During the middle stage of tapping, the dust generation state is almost constant, but as the slag ratio increases, the amount of dust generation gradually increases again, and at the end of the tapping stage, due to blockage of the mud gun, dust generation suddenly increases. rise and reach its peak.

出銑孔閉塞後は発塵は急速に収まり、残銑処埠と保全作
業の際に僅かに発塵するだけとなる。以上に述べたよう
な経過が各出銑タップから次の出銑タンプまでの間に繰
返えされる。After the tap hole is closed, the dust generation quickly subsides, and only a small amount of dust is generated at the residue pit and during maintenance work. The process described above is repeated from each tap to the next tap.

一方以上の発塵を集塵するために鋳床集塵機プロワより
集煙用ダクトが鋳床建屋内に張廻らされ、これらダクト
よシ分岐して発塵個所毎に末端ダンパが設置され、発塵
量の多少に応じてこれらダンパｒｉ開閉操作されて集煙
が行われる。第２図は鋳床集塵機の集煙ダクト及び末端
ダンパの配置例を示す図であり、集塵プロワｌの集塵ダ
クト母管コから分岐された集塵ダクト枝管にはそれぞれ
枝管ダンパ（このダンパを以下末端ダンパという）３−
１〜４が設けられている。なお、図中枝管末端の印は集
塵口である。高炉本体基にはダ個の出銑口が設けられて
おり、各出銑樋上には集塵フード７−１〜４がそれぞれ
配設されておシ、出銑口、出銑・出滓樋、トピードカー
落し口にはそれぞれ集塵口が設けられている。In order to collect more than one type of dust, smoke collection ducts are routed through the casthouse dust collector blower into the casthouse building, and these ducts are branched off and end dampers are installed at each dust generation location. Depending on the amount of smoke, these dampers ri are opened and closed to collect smoke. Fig. 2 is a diagram showing an example of the arrangement of the smoke collection duct and the end damper of the cast bed dust collector, and the dust collection duct branch pipe branched from the dust collection duct main pipe of the dust collection blower l has a branch pipe damper ( This damper is hereinafter referred to as the end damper) 3-
1 to 4 are provided. The mark at the end of the branch pipe in the figure is the dust collection port. The base of the blast furnace main body is provided with 2 tap holes, and dust collection hoods 7-1 to 7-4 are installed above each tap sluice. A dust collection port is provided at each torpedo car drop port.

上述の集塵系統において、鋳床集塵機プロワ／に吸入さ
せるべき適正風量は基本的には時々刻々変化するので、
未出銑時、単−出銑日出銑時あるいはコつの出銑口同時
出銑時の発塵量の変化に追随させなければならないだけ
でなく、鋳床集塵機プロワより集煙ダクトを経由して末
端ダンパまでの系の圧損の変化についても考慮する必要
がある。In the dust collection system mentioned above, the appropriate air volume that should be drawn into the cast bed dust collector blower basically changes from moment to moment.
Not only does it have to follow the change in the amount of dust generated during untapping, single-tapping, single-tapping, or simultaneous tapping of two tapholes, but it is also necessary to keep up with changes in the amount of dust generated during untapping, single-tapping, single-tapping, or simultaneous tapping of two tapholes. It is also necessary to consider changes in pressure drop in the system up to the end damper.

上記系の圧損けどの末端ダンパを開とするか、またその
開口される末端ダンパ数によっても変化する。例えば第
２図にかける鋳床集塵機プロワ、集煙ダクト、末端ダン
パの配置でおれば、第３図に示すように、集塵プロワか
ら遠いλＴＨ（ＴＨはＴａｐ　Ｈｏ１ｅすなわち出銑口
の略号である）出銑時に、！ＴＨ系の末端ダンパ３−２
　を開けた時と、集塵プロワから近い４ＩＴＨ出銑時に
ｆ　ＴＨ系末端ダンパ３−４を開けた時とでは圧損の違
いが大きい。It also changes depending on whether or not the end dampers of the pressure drop in the above system are opened, and the number of end dampers that are opened. For example, if the casthouse dust collector blower, smoke collection duct, and end damper are arranged as shown in Figure 2, then λTH (TH is an abbreviation for Tap Hole or taphole) far from the dust collector blower is shown in Figure 3. ) During tapping,! TH type terminal damper 3-2
There is a large difference in pressure drop between when the fTH system end damper 3-4 is opened and when the fTH system end damper 3-4 is opened during 4ITH tapping near the dust collection blower.

すなわち集塵プロワに近いｌ　ＴＨ系の方が圧損は小さ
くなる。従って同じ風量Ｑｔ得るにしても＝ＴＨ系では
第３図に示すようにＱＡ２の回転数を必要とするが１Ｉ
ＴＨ系ではＱ、／Ｑ４の回転数、すなわちＱ／’Ｑ　２
の回転数に比し少ない回転数でよいことになる。In other words, the pressure loss is smaller in the lTH system, which is closer to the dust collection blower. Therefore, even if the same air volume Qt is obtained, the TH system requires a rotation speed of QA2 as shown in Figure 3, but 1I
In the TH system, the rotation speed of Q, /Q4, that is, Q/'Q 2
This means that the number of revolutions required is smaller than that of the motor.

従って鋳床集塵機のプロワの適正な回転数を決めるため
には、時々刻々に変化する発塵量変化のほかにそれぞれ
の枝管における圧損の変化を捉えることが重要である。Therefore, in order to determine the appropriate rotational speed of the blower of the cast bed dust collector, it is important to understand not only the changes in the amount of dust generated from time to time, but also the changes in the pressure drop in each branch pipe.

本発明によれば、これらの変化を鋳床建屋内に配設され
た末端ダンパの開閉信号に代表させて判断する手段を採
用している。すなわち発塵量あるいは発塵場所の変化に
伴って順次末端ダンパは開操作される。よってこれら開
口末端ダンパ（の数及び−ロ末端ダンパ毎の情報を取込
めば、発塵量変化及び前記圧損の変化を推定することが
できる。According to the present invention, a means is employed for determining these changes by representing the opening/closing signals of the end dampers disposed in the foundry building. That is, the end dampers are sequentially opened as the amount of dust generated or the location of dust generation changes. Therefore, by taking in information on the number of these open end dampers and each of the open end dampers, it is possible to estimate changes in the amount of dust generated and changes in the pressure drop.

本発明によ、れば、全ての末端ダンパくが関与する発塵
量から定め友ダンパ開度のほかにプロワより各々の末端
ダンパまでの圧損に比例して相対比化したアナログ値を
付加して、各末端ダンノシ毎に制御製を決定することに
よシ、末端ダンｌ＜ｍ負信号を用いて当該末端ダンパの
制御値を集塵プロワの回転数制御に用いる。すなわち各
末端ダンパく制御値は結果的に各末端ダンパで集塵する
に必要な吸引風量を得る丸めの回転数比化した指数と言
うことができる。従って開口している末端ダンパくを―
出し、それぞれの末端ダンパの制御値すなわち回転数比
化したアナログ値を時々刻々単純に集計すれば、この値
で上記プロワの回転数制御をすることができ、どのよう
な状況においても集塵プロワの適正回転数を決定するこ
とができる。According to the present invention, in addition to the damper opening degree, which is determined based on the amount of dust generated by all the end dampers, an analog value is added which is a relative ratio in proportion to the pressure drop from the blower to each end damper. By determining the control value for each end damper, the control value of the end damper is used to control the rotation speed of the dust collecting blower using the end damper l<m negative signal. In other words, the control value for each end damper can be said to be an index converted into a rounded rotational speed ratio to obtain the suction air volume necessary for dust collection by each end damper. Therefore, the end damper that is open is
If the control value of each end damper, that is, the analog value converted to the rotation speed ratio, is simply summed up from time to time, this value can be used to control the rotation speed of the blower, and the dust collection blower can be operated under any circumstances. The appropriate rotation speed can be determined.

しかしながら、この方法を単に採用すれば一つの矛盾が
生じ、その・１つは出銑していないＴＨ系の末端ダンパ
を別の目的、例えば樋修理等の保全作業等をするため開
口した場合には、これら末端ダンパについては必要風量
を確保する必要はなく、出銑ＴＨ系末端ダダンのみに必
要風量を確保し、かくすることによって決まる残ヤ分を
出銑していない上記ＴＨ系末端ダンパに振分ゆてやる操
作をしなければならない。何故なら回転数比化したアナ
ログ値は出銑している時に必要とする風量を得るための
値であるから、非出銑時はより小さな値でよいことにな
るからである。例えば第３図の配置においてダＴＨが出
銑している時にａＴＨ系についても末端ダンパのいくつ
かを開口した場合には単純集計しただけでは必要以上の
回転数値となることになる。このことから参丁■系の末
端ダンパが出銑時に必要とする風量が得られるに至るま
で回転数を下げて・もよいことになる。However, if this method is simply adopted, one contradiction will arise; one is that if the end damper of a TH system that is not tapped is opened for another purpose, such as maintenance work such as gutter repair, etc. It is not necessary to secure the required air volume for these terminal dampers, but the required air volume is secured only for the tapping TH system terminal damper, and the residual amount determined by this is transferred to the above TH system terminal damper that is not tapped. You have to perform an operation to allocate the money. This is because the analog value converted into a rotational speed ratio is a value for obtaining the required air volume when tapping, so a smaller value is sufficient when not tapping. For example, in the arrangement shown in FIG. 3, if some of the end dampers of the aTH system are opened while the daTH is being tapped, the rotational speed will be higher than necessary by simply counting. From this, it is possible to lower the rotation speed until the end damper of the Sancho (2) system can obtain the required air volume during tapping.

他の１つ祉回転数比化し喪アナログ相対値が開口する末
端ダンパ数の変化による圧損の全変化領域を満足しない
という矛盾が生ずる。すなわち末端ダンパをどんどん開
けて行くと系の圧損は小さくなり、抵抗−纏は降下する
ため開いて−る末端ダンパの単純なアナログ値の集計で
は風量は必要以上に過剰となり、逆に開口末端ダンパ数
が異常に少ない場合には系の圧損が大きくなシ、抵抗曲
線が上昇する九め開いている末端ダンパのみの単純なア
ナログ値の集計では風量は必要以上に少な目となる。こ
の現象は各末端ダンパのアナログ値を系の抵抗曲線を一
定とし九ことを前提にして振分けたことから生じるもの
である。Another contradiction arises in that the analog relative value does not satisfy the entire range of changes in pressure loss due to changes in the number of open end dampers when converted to a rotational speed ratio. In other words, as the end damper is opened more and more, the pressure drop in the system becomes smaller and the resistance drops, so simply counting the analog value of the open end damper will result in an excessive air flow than necessary; If the number is abnormally small, the pressure drop in the system will be large, and the air volume will be lower than necessary if the resistance curve is increased by simply counting the analog values of only the nine-way open end dampers. This phenomenon occurs because the analog values of each end damper are distributed on the assumption that the resistance curve of the system is constant.

以上のλつの矛盾を解決するため、本発明によれば、ｌ
ＩＩ記風量制御に加えて発塵個所の操業情報、すなわち
鋳床集−にあっては出銑口の出銑状況を捉えて、その状
況に応じてアナログ修正値を各開口末端ダンパのアナロ
グ値の集計値に加えて一括して修正を行なう。この出銑
□状況及び修正値の対応は例えばλＴＨが出銑され、コ
ＴＨ系の末端ダンパが開けられて＄Ｐ、６．さらにＪ　
ＴＨ系の末端ダンパがある数取上開けられているという
状況のもとではそのダンパ開口数と操業情報から修正値
として正あるいは負のアナログ値を付加して集計すると
いう処置が採られる。前記出銑状況の状況数の設定に当
っては起シ得る状況例を予め用意して上記修正値を決定
しておけばよく、その状況例をきめ細かくとシ対処する
。状況例が多ければ多いＩＩ、きめ細かい演算となるが
、高炉の鋳床集塵に当っては数種類の修正値を用意し、
その修正値を選択することによって実用上十分に対処す
ることができることが判った。In order to resolve the above λ contradictions, according to the present invention, l
In addition to the air volume control described in II, the operation information of the dust generation location, that is, the tap status of the taphole in the casthouse collection, is captured and the analog correction value is adjusted according to the situation to the analog value of the damper at the end of each opening. In addition to the aggregated values, corrections are made all at once. The correspondence between this tapping situation and the correction value is, for example, when λTH is tapped, the end damper of the TH system is opened, and $P, 6. Further J
In a situation where a certain number of TH-type end dampers are opened, a positive or negative analog value is added as a correction value based on the damper numerical aperture and operation information, and the data are totaled. In setting the number of situations of the tapping situation, it is sufficient to prepare in advance an example of a situation that may occur and determine the above-mentioned correction value, and then deal with the example of the situation in detail. The more situations there are, the more detailed the calculations will be, but when it comes to dust collection from the cast bed of a blast furnace, several types of correction values are prepared.
It has been found that by selecting the corrected value, it is possible to adequately deal with the problem in practice.

本発明の１つの実施態様によれば、上記状況例を／を種
の状況数に集約して、それぞれの状況毎に６種類の予め
設定した修正値を選択することで対処することができ、
その状況を下記の表に示す。According to one embodiment of the present invention, the above situation examples can be handled by consolidating / into a number of different situations and selecting six types of preset correction values for each situation,
The situation is shown in the table below.

表 出銑状況　　　　　　　　　　　　　・・・・・修正値
（１）　ｔ　ＴＨ出銑（／ＴＨ系の末端ダンパー開）　
・・・　０（コ）２ＴＨ出銑（コＴＨ系の末端ダンパー
開）　・・・　０（、？）　、７　ＴＨ出銑（、ｙＴｐ
系の末端ダンパー開）　・・・　０（ｌＩ）　ｕ　ＴＨ
出銑（４”１’Ｈ系の末端ダンパー開）　・・・　θ（
Ｊ）　／　ＴＨ出銑（ｌＴＨ系の末端ダンパー開）およ
びコテＨ系の末端ダンパーも開　　　　　　・・・−Ｘ
（／萄、７７Ｈ出銑（ＪＴＨ系の末端ダンパーが１＃り
およびコＴＨ系の末端ダンパーも開　　　　・・・−Ｊ
（／→１ＩＴ１’ｌ出銑（ダＴＦＩ系の末端ダンパーが
開）および／ＴＨ系の末端ダンパーも開　　　００．−
よ（／り　Ｉｔ　ＴＨ出銑（ｅＴａ系の末端ダンパーが
開）およびコＴＨ系の末端ダンパーも開　　　　　　−
・−＝（／４）　ｑ−〒Ｈ系出銑（＃τ■系の末端ダン
パーが開）およびＪＴＩＩＩ系の末端ダンパーも開　　
　・・・−二（ｌη出銑末期（／またはコまたは３ま九
はダＴＨ）→　無条件に適用運転 （／１）出銑なし　　　　　　→無条件に最低スピード
ところで出銑状況はマッドガン、開孔機、スプラッシュ
カバー等の炉前機械駆動信号あるいは熱塊検出器（以下
ＨＭＤと称す）、媒塵計等によるセンサー信号等出銑情
報をもとにして鋳床での出銑の状況を論理判定すればよ
いので、本発明によれは出銑状況の判定はこの判定に従
った。例えば開孔機作動中であれば第１図の開孔時の発
塵が予想され、スプラッシュカバーの退避信号を得れば
閉塞時点、またマッドガン、開孔機、スプラッシュカバ
ー何れも退避であれば発塵個所の操業に伴う含塵ガスの
吸引操作ではなく、吸引風量が操業中の風量より少量で
よく、鋳床片付は等の作業用風量と判定可能であシ、集
塵ブロワの回転数減少を果すことができる。Exposed pig iron situation... Corrected value (1) t TH tap iron (/TH system end damper open)
... 0 (K) 2TH tapping (K TH system terminal damper open) ... 0 (,?) , 7 TH tapping (, yTp
System end damper open) ... 0 (lI) u TH
Tapping (4”1’H system end damper open)... θ(
J) / TH tapping (lTH system end damper open) and iron H system end damper also open...-X
(/萄, 77H tapping (The terminal damper of the JTH system is opened and the terminal damper of the TH system is also opened...-J
(/→1IT1'l Tapping (end damper of TFI system is open) and end damper of /TH system is also open 00.-
Yo(/ri It TH tapping (eTa system end damper is open) and coTH system end damper is also open.
・-=(/4) q-〒H system tapping (#τ■ system end damper is open) and JTIII system end damper is also open.
...-2 (lη End of tapping (/or Ko or 3 or 9 is Da TH) → Unconditionally applicable operation (/1) No tapping → Unconditionally at the lowest speed, the tapping situation is mud gun, open hole Logically determines the status of tapping in the casthouse based on tapping information such as drive signals for front furnace machines such as machines, splash covers, etc., sensor signals from hot mass detectors (hereinafter referred to as HMD), dust meters, etc. Therefore, according to the present invention, the determination of the tapping situation is based on this determination.For example, if the hole punching machine is in operation, dust generation is expected when the hole is drilled as shown in Fig. 1, and the evacuation signal of the splash cover is If the mud gun, hole drill, and splash cover are all evacuated, the suction air volume may be smaller than the air volume during operation, rather than suction operation of dust-containing gas that accompanies operation of the dust generating area. It is possible to determine the working air volume for clearing the cast bed, etc., and it is possible to reduce the number of rotations of the dust collection blower.

本発明方法を実施するのに使用する７つの吹込風量演算
制御装置の簡易化した回路図を第ダ図に示す。同図にお
いて演算Ｆｉ／　ＴＨ系、２ＴＨ系、ＪＴＨ系、ダＴＨ
系の各開口末端ダンパ群単位毎の加算演算と修正値の加
算演算と及びそれらの最終的な加算演算とに分けられて
いる。各信号に課せられるアナログ値は例えば／Ｒ１１
１のようにボリュームにより簡易に設定可変できるよう
にしている。また最終的な加算演算では２ＲＨによる全
体バイアス設定調整あるいは３ＲＨによる全体倍率設定
調整も可能としている。なお入ロダンバ制御による省電
力運転におけるダンパ開度基準についても上記と同様の
考え方の演算制御で対処することができる。A simplified circuit diagram of seven blown air volume calculation and control devices used to carry out the method of the present invention is shown in FIG. In the same figure, calculation Fi/TH system, 2TH system, JTH system, DaTH system
It is divided into an addition operation for each opening end damper group unit of the system, an addition operation of correction values, and a final addition operation thereof. The analog value imposed on each signal is, for example, /R11
1, the settings can be easily changed by adjusting the volume. Furthermore, in the final addition calculation, it is possible to adjust the overall bias setting using 2RH or the overall magnification setting using 3RH. Note that the damper opening degree standard in power-saving operation using input load damper control can also be handled by calculation control based on the same concept as above.

本発明によれば、高炉鋳床集塵機の省電力を目的とした
吸込風量制御におけるその適正吸込風量を決める基準を
簡易に、かつ自動的に精度よく演算して供給することが
できる。According to the present invention, it is possible to easily and automatically calculate and supply a criterion for determining an appropriate suction air volume in suction air volume control for the purpose of power saving of a blast furnace casthouse dust collector.

なお本発明は単に高炉鋳床集塵機だけでなく、末端ダン
パ等の多くの情報因子が引き込む風量を支配するような
集塵機の適正吸込風量基準へ適用することができる。The present invention can be applied not only to blast furnace casthouse dust collectors, but also to appropriate suction air volume standards for dust collectors in which many information factors such as end dampers control the air volume drawn.

以上述べ友ように本発明によれば含塵ガスを吸引するに
際し、集塵吸引風量と管内圧力損失から適切な集塵ブロ
ワ回転数となし、その含塵ガスを極めて効率的に吸引す
ることが可能となる。As described above, according to the present invention, when suctioning dust-containing gas, the rotation speed of the dust-collecting blower is determined to be appropriate based on the dust-collecting suction air volume and pressure loss in the pipe, and the dust-containing gas can be suctioned extremely efficiently. It becomes possible.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は高炉出銑状況の時間的変化と発塵量変化との関
係を示す図、第２図は高炉鋳床集塵機の集煙ダクト及び
末端ダンパの１つの配置図、第３図は集煙ダクトの長さ
の違いによる抵抗曲線の変化を示す説明図、第１図は吸
込風量演算制御装置の簡易化した回路図である。 ｌ・・・鋳床集塵機メインブロワ、コ・・・集煙ダクト
、３−１・・・／　ＴＨ系末端ダンパ、３−２・−・Ｊ
ＴＨ系末端ダハ、Ｊ　ｓ・・・３ＴＦ１系末端ダンパ、
３−４・・・４ｔＴＨ系末端ダンパ、ｊ・・・高炉鋳９
？　！＃Ｗ　Ｆａ、６・・・高炉炉体、７−１・・・／
ＴＨ出銑口、７−２・・・２ＴＨ出銑口、７−３・・・
３ＴＨ出銑口、７−４・・・りＴＨ出銑口。 ＝ｖｆ内Figure 1 is a diagram showing the relationship between temporal changes in blast furnace tapping conditions and changes in dust generation, Figure 2 is a layout diagram of the smoke collection duct and end damper of the blast furnace casthouse dust collector, and Figure 3 is a diagram showing the relationship between temporal changes in blast furnace tapping conditions and changes in dust generation. FIG. 1 is an explanatory diagram showing changes in resistance curves due to differences in smoke duct length, and is a simplified circuit diagram of a suction air volume calculation and control device. L...Castbed dust collector main blower, K...Smoke collection duct, 3-1.../TH system end damper, 3-2...J
TH system terminal roof, J s...3TF1 system terminal damper,
3-4...4tTH type end damper, j...Blast furnace casting 9
? ! #W Fa, 6... Blast furnace body, 7-1.../
TH taphole, 7-2...2TH taphole, 7-3...
3TH taphole, 7-4...riTH taphole. = within vf

Claims (1)

【特許請求の範囲】[Claims] Ｌ　複数個所で発生する含塵ガスを集塵口、枝管、枝管
ダンパ、母管、集塵ブロワを経て集塵機へ送給する集塵
系統の這轍法にシいて、発塵個所で発生する発塵量から
前記枝管ダンＡｏ一度を定め、ダンパ開度とそＯＮ寂に
お社る枝管内圧力損失を考慮し九制御値を各枝管毎に決
定し、前記枝管ダンパの開・閉信号をもとＫして各ダン
パの集計制御値から集塵ブロワの回転数制御を行うと共
に、前記枝管ダンパの開・閉ダンパ数と操業情報を上記
集計制御値の制御因子として上記回転数の調整をさらに
行うことを脣黴とする複数個所で発生する含塵ガスを集
ｍする集塵系統の運転方法。L The dust-containing gas generated at multiple locations is sent to the dust collector via the dust collection port, branch pipe, branch pipe damper, main pipe, and dust collection blower. The branch pipe damper Ao is determined based on the amount of dust generated, and a control value is determined for each branch pipe by considering the damper opening degree and the pressure loss within the branch pipe due to the damper opening.・The rotation speed of the dust collection blower is controlled based on the aggregated control value of each damper based on the closing signal, and the number of opening/closing dampers of the branch pipe damper and operation information are used as control factors for the aggregated control value. A method of operating a dust collection system that collects dust-containing gas generated at multiple locations, which requires further adjustment of the rotation speed.