JP6020111B2 - Method and apparatus for detecting blast furnace dust accumulation level - Google Patents

Method and apparatus for detecting blast furnace dust accumulation level Download PDF

Info

Publication number
JP6020111B2
JP6020111B2 JP2012269073A JP2012269073A JP6020111B2 JP 6020111 B2 JP6020111 B2 JP 6020111B2 JP 2012269073 A JP2012269073 A JP 2012269073A JP 2012269073 A JP2012269073 A JP 2012269073A JP 6020111 B2 JP6020111 B2 JP 6020111B2
Authority
JP
Japan
Prior art keywords
blast furnace
furnace dust
temperature
thermometer
dust
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
JP2012269073A
Other languages
Japanese (ja)
Other versions
JP2014114478A (en
Inventor
茂利 森田
茂利 森田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP2012269073A priority Critical patent/JP6020111B2/en
Publication of JP2014114478A publication Critical patent/JP2014114478A/en
Application granted granted Critical
Publication of JP6020111B2 publication Critical patent/JP6020111B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Blast Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Description

本発明は、高温ガス中のガス灰捕集装置である高炉ダストキャッチャー(以下DCと称する)において、捕集された高温の高炉ダストの堆積レベルを検出する、高炉ダスト堆積レベルの検出方法および検出装置に関するものである。   The present invention relates to a blast furnace dust accumulation level detection method and a detection method for detecting the accumulation level of collected high temperature blast furnace dust in a blast furnace dust catcher (hereinafter referred to as DC) which is a gas ash collection device in high temperature gas. It relates to the device.

一般に、銑鉄の製造における高炉には、炉頂から装入物として、粉鉄鉱石を焼き固めた焼結鉱や塊状鉄鉱石等、及びコークスが、交互に高炉の上部から装入されて堆積し、炉内に鉱石層およびコークス層が形成される。そして、高炉下方にある羽口から吹き込まれる熱風とコークスとの反応によって生じるCOガスにより、鉄鉱石は加熱、還元され(間接還元)、一部はコークスにより直接的に還元されて、軟化融着帯を形成した後、溶滴となる。溶滴、すなわち溶銑は、コークス層の間を通過して炉底部に溜まる。このとき高炉から発生する高炉ガスは、COを多量に含んでいるので、回収して種々の用途に再利用される。   In general, in the blast furnace in the production of pig iron, sintered ore, lump iron ore, etc., baked and hardened with powdered iron ore, and coke are charged from the top of the blast furnace and accumulated alternately. An ore layer and a coke layer are formed in the furnace. The iron ore is heated and reduced (indirect reduction) by the CO gas generated by the reaction between hot air blown from the tuyere below the blast furnace and coke, and part of it is reduced directly by coke and softened and fused. After forming the band, it becomes a droplet. The droplets, that is, the molten iron, pass between the coke layers and accumulate at the bottom of the furnace. At this time, since the blast furnace gas generated from the blast furnace contains a large amount of CO, it is recovered and reused for various purposes.

高炉ガスには高炉ダストが浮遊しているため、高炉ガスを再利用する際には、高炉ダストを除去する必要がある。そこで、高炉ガスは、高炉から、例えばサイクロン式集塵設備等による集塵設備へ送られ、そこで高炉ダストが除去される。そして、高炉ダストが除去された高炉ガスは、ガス洗浄装置で洗浄され、その後、燃料等として再利用される。   Since blast furnace dust is floating in the blast furnace gas, it is necessary to remove the blast furnace dust when reusing the blast furnace gas. Therefore, the blast furnace gas is sent from the blast furnace to a dust collection facility such as a cyclone type dust collection facility, where blast furnace dust is removed. The blast furnace gas from which the blast furnace dust has been removed is cleaned by a gas cleaning device and then reused as fuel or the like.

高炉ガスから除去された高炉ダストは、集塵設備のDC底部に貯留される。高炉の連続操業により、DCの底部に貯留される高炉ダストは徐々に堆積されていく。堆積された高炉ダストは適宜排出する必要があり、そのためには、DC内の高炉ダストの貯留量を検出することが重要である。   Blast furnace dust removed from the blast furnace gas is stored at the DC bottom of the dust collection facility. Due to the continuous operation of the blast furnace, the blast furnace dust stored at the bottom of the DC gradually accumulates. Accumulated blast furnace dust must be discharged as appropriate, and for that purpose it is important to detect the amount of blast furnace dust stored in the DC.

従来、例えば、集塵設備の外側から放射線を照射して、DC内に堆積した高炉ダストの高さを検出する技術が検討されている。ところが、放射線を使用する場合、照射する回数を制限する必要があるため、検出精度に限界がある。しかも、放射線の使用にあたっては、測定機器のみならず作業員の被曝管理も必要であり、安全性の確保に多大な時間と労力を要する。   Conventionally, for example, a technique for detecting the height of blast furnace dust accumulated in DC by irradiating radiation from the outside of a dust collection facility has been studied. However, when using radiation, since it is necessary to limit the number of times of irradiation, the detection accuracy is limited. In addition, when using radiation, it is necessary to manage not only the measurement equipment but also the exposure of workers, and a great deal of time and labor is required to ensure safety.

そのため、放射線を使用しない検出方法として、例えば特許文献1には、DC側壁の高さ方向で選択した一定範囲のレベル間の平均温度を測定して、上限レベル以上のレベルの側壁温度および下限レベル以下のレベルの側壁温度に基づいて演算し、DC内に堆積したダストレベルを知る方法が開示されている。   Therefore, as a detection method that does not use radiation, for example, Patent Document 1 discloses that the average temperature between a certain range of levels selected in the height direction of the DC side wall is measured, and the side wall temperature and the lower limit level are higher than the upper limit level. A method for calculating the dust level accumulated in DC by calculating based on the following side wall temperature is disclosed.

また、特許文献2には、集塵設備の外筒を上下方向に複数の帯域に分けて各帯域の平均温度を測定し、その平均温度と予め設定したしきい値とを比較して、ダストレベルを判定する方法が開示されている。   In Patent Document 2, the outer cylinder of the dust collection facility is divided into a plurality of bands in the vertical direction, the average temperature of each band is measured, the average temperature is compared with a preset threshold value, and dust is collected. A method for determining the level is disclosed.

特開昭55−131724号公報JP-A-55-131724 特開2007−262438号公報JP 2007-262438 A

しかしながら、上記特許文献1、2は、平均温度に基づいて高炉ダストの貯留量を管理するため、高精度な検出は期待できない。さらに、いずれも、ダストを堆積させるDCの外側に設置した温度計の測定値によって、高炉ダストの貯留量を検出する方法であり、DC内の温度を間接的に測定するため、精度に問題がある。   However, since Patent Documents 1 and 2 manage the amount of stored blast furnace dust based on the average temperature, highly accurate detection cannot be expected. Furthermore, both are methods for detecting the amount of blast furnace dust stored by the measured value of a thermometer installed outside the DC where dust is deposited, and the temperature inside the DC is indirectly measured, so there is a problem in accuracy. is there.

そこで、本発明は、高炉ダストキャッチャー(DC)内の高炉ダストの堆積量を、放射線を使用せず高精度に検出できる、高炉ダスト堆積レベルの検出方法および検出装置を提供することを目的とする。   Therefore, an object of the present invention is to provide a detection method and a detection apparatus for a blast furnace dust accumulation level, which can detect the accumulation amount of blast furnace dust in a blast furnace dust catcher (DC) with high accuracy without using radiation. .

上記問題を解決するため、本発明は、高炉ダストキャッチャーにおける高炉ダスト堆積レベルの検出方法であって、前記高炉ダストキャッチャーの内部の温度を測定する温度計を備え、前記温度計の測定値より、所定時間当たりの温度変化量を算出し、前記温度変化量と予め設定した規定値とを比較して、前記温度変化量が前記規定値よりも少ない状態が一定時間以上継続したときに、前記温度計の位置に高炉ダストが有ると判定することを特徴とする、高炉ダスト堆積レベルの検出方法を提供する。 In order to solve the above problems, the present invention is a method for detecting a blast furnace dust accumulation level in a blast furnace dust catcher, comprising a thermometer for measuring the temperature inside the blast furnace dust catcher, and from the measured value of the thermometer, The temperature change amount per predetermined time is calculated, and the temperature change amount is compared with a preset specified value, and when the state where the temperature change amount is less than the specified value continues for a certain time or more, the temperature Provided is a method for detecting a blast furnace dust accumulation level, wherein it is determined that blast furnace dust is present at a total position.

前記高炉ダスト堆積レベルの検出方法において、前記高炉ダストキャッチャーの底部を高さ方向に複数の区画に分けて、前記複数の区画にそれぞれ温度計を配置してもよい。 In the method for detecting a blast furnace dust accumulation level, the bottom of the blast furnace dust catcher may be divided into a plurality of sections in the height direction, and thermometers may be disposed in the plurality of sections.

さらに、本発明は、高炉ダストキャッチャーにおける高炉ダスト堆積レベルの検出装置であって、前記高炉ダストキャッチャーの内部の温度を測定する温度計と、前記温度計の測定値より、所定時間当たりの温度変化量を算出し、前記温度変化量と予め設定した規定値とを比較して、前記温度変化量が前記規定値よりも少ない状態が一定時間以上継続したときに、前記温度計の位置に高炉ダストが有ると判定する判定部と、を有することを特徴とする、高炉ダスト堆積レベルの検出装置を提供する。 Furthermore, the present invention is a blast furnace dust accumulation level detection device in a blast furnace dust catcher, a thermometer for measuring the temperature inside the blast furnace dust catcher, and a temperature change per predetermined time from the measured value of the thermometer An amount is calculated, and the temperature change amount is compared with a preset specified value.When a state where the temperature change amount is less than the specified value continues for a certain period of time or longer , a blast furnace dust is placed at the thermometer position. And a blast furnace dust accumulation level detection device, comprising: a determination unit that determines that the blast furnace dust is present.

本発明によれば、安全かつ高精度に、DC内の高炉ダストの堆積レベルを検出することができる。   According to the present invention, the accumulation level of blast furnace dust in DC can be detected safely and with high accuracy.

高炉設備の例を示す構成図である。It is a block diagram which shows the example of a blast furnace equipment. 本発明の実施の形態にかかる検出装置の例を示す断面図である。It is sectional drawing which shows the example of the detection apparatus concerning embodiment of this invention. 高炉の炉頂部とDC内の温度測定値の例を示すグラフである。It is a graph which shows the example of the temperature measurement value in the furnace top part and DC in a blast furnace. 図3の温度測定時のDC内部を示す断面図であり、(A)は図3のT1、T4時、(B)は図3のT2、T3時を示す。4A and 4B are cross-sectional views showing the inside of the DC at the time of temperature measurement in FIG. 3, where FIG. 3A shows the time T1, T4 in FIG. 3, and FIG. 3B shows the time T2, T3 in FIG. 本発明の実施の形態にかかる検出方法を説明するグラフである。It is a graph explaining the detection method concerning embodiment of this invention.

以下、本発明の実施の形態を、図を参照して説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1は、本発明が適用される高炉ダストキャッチャー(DC)を備えた高炉設備の構成例を示す。高炉1には、炉頂から鉄鉱石または鉱石、及びコークスが交互に装入され、高炉下方から吹き込まれる熱風とコークスとの反応によって生じるCOガスにより、鉄鉱石は加熱、還元され、溶銑となる。溶銑は、コークス層の間を通過して炉底部に溜まり、このとき、高炉1から高炉ガス2が発生する。高炉1で発生した高炉ガス2は、高炉ダストを除去して再利用するために、例えばサイクロン式集塵設備等による集塵設備3へ送られる。集塵設備3で除去された高炉ダスト4はDC5の底部に堆積される。その後、高炉ガス2はガス洗浄装置6で洗浄され、燃料等として再利用される。   FIG. 1 shows a configuration example of a blast furnace facility including a blast furnace dust catcher (DC) to which the present invention is applied. In the blast furnace 1, iron ore or ore and coke are alternately charged from the top of the furnace, and the iron ore is heated and reduced by the CO gas generated by the reaction between hot air blown from the bottom of the blast furnace and coke, and becomes hot metal. . The hot metal passes between the coke layers and accumulates at the bottom of the furnace. At this time, blast furnace gas 2 is generated from the blast furnace 1. The blast furnace gas 2 generated in the blast furnace 1 is sent to a dust collection facility 3 such as a cyclone type dust collection facility in order to remove and reuse the blast furnace dust. Blast furnace dust 4 removed by the dust collection equipment 3 is deposited on the bottom of the DC 5. Thereafter, the blast furnace gas 2 is cleaned by the gas cleaning device 6 and reused as fuel or the like.

本発明者らは、DC5の底部に堆積した高炉ダスト4の上面位置を検出する手段として、高炉ダスト4の温度に着目した。DC5には、高炉1内で高温に曝された高炉ダスト4が高炉ガス2とともに吹き込まれ、高炉ダスト4がDC5の底部に堆積する。このとき、DC5内の空間の温度は高炉ガス2の温度変化とほぼ同等の変動をするのに対して、堆積した高炉ダスト4は、高炉ガス2の温度変化の影響をほとんど受けない。そこで、熱電対を用いてDC5内部の温度を測定したところ、高炉ダスト4に埋もれた熱電対の測定値は、埋もれた時点の温度を起点として一定勾配による温度下降または一定の温度推移を示す特性があることが分かった。高炉ガス2の温度変動は極めて大きいため、ある一定の温度をしきい値として、温度測定値がそのしきい値を単純に超えた(下回った)ときに高炉ダストの有無を判定するという従来の方法では、誤って判定される場合がある。本発明者らは、温度変化の特性を活用することによって、高炉ダスト4の上面位置を正確に検出することが可能であることを見出した。   The inventors paid attention to the temperature of the blast furnace dust 4 as means for detecting the upper surface position of the blast furnace dust 4 deposited on the bottom of the DC 5. The blast furnace dust 4 exposed to a high temperature in the blast furnace 1 is blown into the DC 5 together with the blast furnace gas 2, and the blast furnace dust 4 is deposited on the bottom of the DC 5. At this time, the temperature of the space in the DC 5 fluctuates substantially the same as the temperature change of the blast furnace gas 2, whereas the accumulated blast furnace dust 4 is hardly affected by the temperature change of the blast furnace gas 2. Therefore, when the temperature inside the DC 5 was measured using a thermocouple, the measured value of the thermocouple buried in the blast furnace dust 4 is a characteristic that shows a temperature decrease due to a constant gradient or a constant temperature transition starting from the temperature at the time of being buried. I found out that Since the temperature fluctuation of the blast furnace gas 2 is extremely large, the conventional method of determining the presence or absence of blast furnace dust when the temperature measurement value simply exceeds (below) the threshold value with a certain temperature as a threshold value. The method may be erroneously determined. The present inventors have found that the upper surface position of the blast furnace dust 4 can be accurately detected by utilizing the characteristics of temperature change.

図2は、本発明の実施の形態にかかる検出装置の一例を示し、集塵設備3のDC5を拡大した断面図である。本実施形態においては、DC5の底部を、上下方向に複数、例えば6つの区画7a〜7fに分けて、各区画7a〜7fの内部にそれぞれ温度計8を取り付ける。温度計8は、各区画7a〜7fにおいて同一円周位置に配置され、測温部9がDC5の内部に配置されるように取り付けられる。また、温度計8は、それぞれ、測定データの読み取りおよびそのデータを用いた演算を行う判定部10に接続される。各区画7a〜7fに取り付ける温度計8の個数は1つずつには限らず、区画毎に円周方向に複数個の温度計8を設置すれば、高炉ダスト4の円周方向の堆積分布が検出され、さらに検出精度が向上する。温度計8の種類は、DC5内部の高炉ダスト4を直接測温するため、熱電対を使用するのが好ましく、測温部9がDC5の内部に配置されていればよい。また、DC5の底部を分割する区画の数は、DC5の大きさにもよるため特に限定しないが、多すぎると温度計8の取り付けや配線およびメンテナンスの手間が増大するため、4〜6区画が好ましい。ただし、例えば1区画のみとして、高炉ダスト4の上限に設定する高さのみの温度測定を行って高炉ダスト4の有無を検出するようにしてもよい。   FIG. 2 is an enlarged cross-sectional view of the DC 5 of the dust collection facility 3, showing an example of the detection device according to the embodiment of the present invention. In the present embodiment, the bottom of the DC 5 is divided into a plurality of, for example, six sections 7a to 7f in the vertical direction, and the thermometer 8 is attached to each of the sections 7a to 7f. The thermometer 8 is arrange | positioned in the same circumferential position in each division 7a-7f, and is attached so that the temperature measurement part 9 may be arrange | positioned inside DC5. Each thermometer 8 is connected to a determination unit 10 that reads measurement data and performs calculation using the data. The number of thermometers 8 attached to each of the sections 7a to 7f is not limited to one, and if a plurality of thermometers 8 are installed in the circumferential direction for each section, the distribution distribution of the blast furnace dust 4 in the circumferential direction is increased. It is detected and the detection accuracy is further improved. Since the thermometer 8 directly measures the temperature of the blast furnace dust 4 inside the DC 5, it is preferable to use a thermocouple, and the temperature measuring unit 9 only needs to be arranged inside the DC 5. In addition, the number of compartments that divide the bottom of the DC 5 is not particularly limited because it depends on the size of the DC 5, but if it is too large, it takes time to install the thermometer 8, wiring, and maintenance. preferable. However, the presence or absence of the blast furnace dust 4 may be detected by measuring only the height set to the upper limit of the blast furnace dust 4 for only one section.

次に、図2に示す検出装置を用いて各区画の高炉ダスト4の有無を判定する検出方法を説明する。   Next, the detection method which determines the presence or absence of the blast furnace dust 4 of each division using the detection apparatus shown in FIG. 2 is demonstrated.

一般的に、高炉ガス2の温度は、高炉1の稼働状況に応じて上下に変動する。図3は、高炉1内の炉頂部の温度、およびDC5の底部に図4に示すように3つの温度計8a、8b、8cを設置した場合の各温度計8a、8b、8cによる温度測定値の例を示すグラフである。炉頂部の温度は、図3に破線で示すように、高炉ガス2の温度と同期して規則的に変動している。温度計8a、8b、8cがいずれも高炉ダスト4に埋もれていない場合、温度測定値は、DC5の内部空間の温度を示し、炉頂部の温度と同期して変動する。図4(A)に示すように、一番下の温度計8aが高炉ダスト4に埋もれ始めると(図3のT1)、温度計8aの測定値t8aは、高炉ガス2の温度変動にかかわらず、一定勾配による温度降下または一定の温度推移を示す。さらに高炉ダスト4の量が増えて、温度計8bが高炉ダスト4に埋もれ始めると(図3のT2)、温度計8bの測定値t8bが、一定勾配による温度降下または一定の温度推移を示す。その後、温度計8cが高炉ダスト4に埋もれる前に、高炉ダスト4が排出され、温度計8bが高炉ダスト4から抜け出すと(図3のT3)、温度計8bの測定値t8bが、再び炉頂部の温度と同期して変動するようになる。さらに高炉ダスト4が排出されて温度計8aが高炉ダスト4から抜け出すと(図3のT4)、温度計8aの測定値t8aも、炉頂部の温度と同期して変動する。本発明は、この温度推移の特性を利用して、温度計8が設置された位置の高炉ダスト4の有無を判定する。   Generally, the temperature of the blast furnace gas 2 fluctuates up and down depending on the operating status of the blast furnace 1. FIG. 3 shows the temperature measured by the thermometers 8a, 8b, and 8c when three thermometers 8a, 8b, and 8c are installed at the bottom of the DC 5 as shown in FIG. It is a graph which shows the example of. The temperature at the top of the furnace fluctuates regularly in synchronization with the temperature of the blast furnace gas 2 as indicated by a broken line in FIG. When none of the thermometers 8a, 8b, 8c is buried in the blast furnace dust 4, the temperature measurement value indicates the temperature of the internal space of the DC 5, and fluctuates in synchronization with the temperature of the top of the furnace. As shown in FIG. 4A, when the bottom thermometer 8a starts to be buried in the blast furnace dust 4 (T1 in FIG. 3), the measured value t8a of the thermometer 8a is irrespective of the temperature fluctuation of the blast furnace gas 2. , Indicates a temperature drop due to a constant gradient or a constant temperature transition. When the amount of blast furnace dust 4 further increases and the thermometer 8b begins to be buried in the blast furnace dust 4 (T2 in FIG. 3), the measured value t8b of the thermometer 8b shows a temperature drop due to a constant gradient or a constant temperature transition. Thereafter, before the thermometer 8c is buried in the blast furnace dust 4, when the blast furnace dust 4 is discharged and the thermometer 8b comes out of the blast furnace dust 4 (T3 in FIG. 3), the measured value t8b of the thermometer 8b is again the top of the furnace. It fluctuates in synchronization with the temperature of. When the blast furnace dust 4 is further discharged and the thermometer 8a comes out of the blast furnace dust 4 (T4 in FIG. 3), the measured value t8a of the thermometer 8a also varies in synchronization with the temperature at the top of the furnace. In the present invention, the presence / absence of blast furnace dust 4 at the position where the thermometer 8 is installed is determined using the characteristics of the temperature transition.

すなわち、先ず、DC5内部に配置したそれぞれの温度計8により、予め設定した時間ΔT(sec)毎に温度測定を行い、前回の温度測定値と比較する。測定値の比較は、温度差の絶対値とする。一方、高炉1の稼働状況による高炉ガス2の温度変動を元に、時間ΔTの温度差である温度の偏差Δt(℃)を規定値として予め設定しておく。   That is, first, the temperature is measured every preset time ΔT (sec) by each thermometer 8 arranged in the DC 5 and compared with the previous temperature measurement value. The comparison of measured values is the absolute value of the temperature difference. On the other hand, a temperature deviation Δt (° C.), which is a temperature difference of the time ΔT, is set in advance as a specified value based on the temperature fluctuation of the blast furnace gas 2 depending on the operating condition of the blast furnace 1.

そして、温度計8による時間ΔT毎の温度測定値の差が、偏差Δt以内となる状態が、一定時間以上継続するかどうかで、温度計8が高炉ダスト4に埋もれているかどうかを判定する。つまり、温度計8が高炉ダスト4の上端よりも上方に配置されているときには、温度計8の測定値は、高炉ガス2の温度変動と同期するため、時間ΔTの温度測定値の差が偏差Δt以下という状態が継続することはない。これに対し、温度計8が高炉ダスト4に埋もれた場合は、高炉ダスト4によって保温状態となり、高炉ガス2の温度変動と同期せず、一定勾配による温度下降または一定の温度推移を示す。尚、この時の高炉ダスト4の温度は、温度計8が埋もれた時点の温度が起点となる。この場合、温度測定値の差が偏差Δt以内となる状態が継続するので、高炉ダスト有りと判定される。高炉ダスト4が排出されて再び温度計8が高炉ダスト4の上方に露出するまで、この状態が継続する。温度計8が高炉ダスト4から露出すれば、変動する高炉ガス2の温度と同期して、再び偏差Δtを上回る温度差が生じるため、高炉ダスト無しと判定される。   Then, whether or not the thermometer 8 is buried in the blast furnace dust 4 is determined based on whether or not the state in which the difference between the temperature measured values for each time ΔT by the thermometer 8 is within the deviation Δt continues for a certain time or more. That is, when the thermometer 8 is arranged above the upper end of the blast furnace dust 4, the measured value of the thermometer 8 is synchronized with the temperature fluctuation of the blast furnace gas 2. The state of Δt or less does not continue. On the other hand, when the thermometer 8 is buried in the blast furnace dust 4, it is kept warm by the blast furnace dust 4, and does not synchronize with the temperature fluctuation of the blast furnace gas 2, and shows a temperature decrease due to a constant gradient or a constant temperature transition. In addition, the temperature of the blast furnace dust 4 at this time starts from the temperature when the thermometer 8 is buried. In this case, since the state where the difference between the temperature measurement values is within the deviation Δt continues, it is determined that there is blast furnace dust. This state continues until the blast furnace dust 4 is discharged and the thermometer 8 is exposed above the blast furnace dust 4 again. If the thermometer 8 is exposed from the blast furnace dust 4, a temperature difference exceeding the deviation Δt is generated again in synchronization with the temperature of the blast furnace gas 2, so it is determined that there is no blast furnace dust.

図5は、温度測定値の時間変化のグラフの一例を示す。本発明にかかる高炉ダスト堆積レベルの検出方法について、図5に基づいて更に具体的に説明する。   FIG. 5 shows an example of a graph of the time change of the temperature measurement value. The method for detecting the blast furnace dust accumulation level according to the present invention will be described more specifically with reference to FIG.

図5のA区間では、温度計8による測定値は、高炉の稼働状況に応じて上下に変動し、各測定値A1、A2、A3、A4は、それぞれ、前回の測定値に対して、予め設定した偏差Δtを超える温度差が生じている。この場合には、温度計8の位置は高炉ダストの非検知が判定される。測定間隔は例えば20秒、偏差Δtは例えば0.6℃と設定される。   In the A section of FIG. 5, the measurement value by the thermometer 8 fluctuates up and down according to the operating condition of the blast furnace, and each of the measurement values A1, A2, A3, A4 is in advance with respect to the previous measurement value. A temperature difference exceeding the set deviation Δt occurs. In this case, the non-detection of blast furnace dust is determined at the position of the thermometer 8. The measurement interval is set to 20 seconds, for example, and the deviation Δt is set to 0.6 ° C., for example.

温度計8が高炉ダスト4に埋もれていなくても、温度差が偏差Δt以内となる場合がある。図5のB区間において、測定値B1とB2のように、炉内の温度が下限値となる前後で測定したときには、温度差が0に近く、偏差Δt以内となる。この時点で、高炉ダスト4有りと判定するための判定タイマーが開始される。ところが、次の測定値B3では、測定値B2に対してΔtを超える温度差が生じたため、温度差が偏差Δt以内となる状態が一定時間継続したことにはならない。この場合には、判定タイマーは停止され、時間測定をリセットして、高炉ダストの非検知が判定される。偏差Δt以内となる状態が継続する一定時間は、例えば120秒と設定される。   Even if the thermometer 8 is not buried in the blast furnace dust 4, the temperature difference may be within the deviation Δt. In the section B of FIG. 5, when the temperature in the furnace is measured before and after the temperature reaches the lower limit as measured values B1 and B2, the temperature difference is close to 0 and within the deviation Δt. At this time, a determination timer for determining that there is blast furnace dust 4 is started. However, in the next measured value B3, a temperature difference exceeding Δt occurs with respect to the measured value B2, and thus the state where the temperature difference is within the deviation Δt does not continue for a certain time. In this case, the determination timer is stopped, the time measurement is reset, and non-detection of blast furnace dust is determined. The fixed time during which the state within the deviation Δt continues is set to 120 seconds, for example.

図5のC区間では、測定値C1からC4までの間は、一定勾配による緩やかな温度下降の推移を示している。測定値C1とC2の温度差が偏差Δt以内となり、このときに判定タイマーが開始される。一定時間経過後の測定値Cnまでの間、偏差Δt以内の状態が継続すれば、判定タイマーがカウントアップし、その時点で、高炉ダストの検知が判定される。その後も温度測定が行われ、温度測定値の差と偏差Δtとの比較を継続する。   In the section C in FIG. 5, the transition between the measured values C1 and C4 shows a gradual temperature decrease due to a constant gradient. The temperature difference between the measured values C1 and C2 is within the deviation Δt, and at this time, the determination timer is started. If the state within the deviation Δt continues until the measured value Cn after a certain time has elapsed, the determination timer counts up, and at that time, detection of blast furnace dust is determined. Thereafter, the temperature measurement is performed, and the comparison between the difference between the temperature measurement values and the deviation Δt is continued.

図5のD区間では、最初の測定値D1とD2の温度差は偏差Δt以下であるが、測定値D3とD2との温度差はΔtを上回っている。高炉ダスト4の排出により、このように再び温度差が偏差Δtよりも大きくなれば、すぐに判定タイマーがリセットされ、高炉ダストの非検知が判定される。   In the section D of FIG. 5, the temperature difference between the first measured values D1 and D2 is equal to or less than the deviation Δt, but the temperature difference between the measured values D3 and D2 exceeds Δt. If the temperature difference again becomes larger than the deviation Δt due to the discharge of the blast furnace dust 4, the determination timer is immediately reset and it is determined that blast furnace dust is not detected.

以上のように、温度測定値の差の推移と、予め設定した偏差Δtとを比較することにより、温度測定位置における高炉ダストの有無を判定することができる。本発明では、DC5の内部に温度計8の測温部9を配置して直接温度測定を行うため、正確にDC5内部の状態を把握できる。そして、このような温度測定による高炉ダストの検出を、DC5の高さ方向の区画毎に独立して実施することで、各区画での高炉ダスト4の有無を判定でき、DC5内の高炉ダスト堆積レベルの高精度な検出が可能となる。   As described above, the presence or absence of blast furnace dust at the temperature measurement position can be determined by comparing the transition of the difference between the temperature measurement values and the preset deviation Δt. In the present invention, since the temperature measuring unit 9 of the thermometer 8 is arranged inside the DC 5 and the temperature is directly measured, the state inside the DC 5 can be accurately grasped. And by detecting the blast furnace dust by such temperature measurement independently for every division of the height direction of DC5, the presence or absence of the blast furnace dust 4 in each division can be determined, and blast furnace dust accumulation in DC5 can be determined. The level can be detected with high accuracy.

以上、本発明の好適な実施形態について説明したが、本発明はかかる例に限定されない。当業者であれば、特許請求の範囲に記載された技術的思想の範疇内において、各種の変更例または修正例に想到しうることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。   As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this example. It is obvious for those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea described in the claims. It is understood that it belongs to.

例えば、上記実施形態では、温度計8の測温部9がDC5内に配置されているものとしたが、DC5の内部の温度を直接測定できれば良く、温度計8全体がDC5の内部に配置されても構わない。   For example, in the above embodiment, the temperature measuring unit 9 of the thermometer 8 is disposed in the DC 5, but it is sufficient that the temperature inside the DC 5 can be directly measured, and the entire thermometer 8 is disposed in the DC 5. It doesn't matter.

本発明は、温度が変動する高温ガス中のガス灰捕集装置において、捕集された高温のガス灰の堆積レベルを検出する際に適用できる。   INDUSTRIAL APPLICABILITY The present invention can be applied when detecting the accumulation level of collected high-temperature gas ash in a gas ash collection device in high-temperature gas whose temperature varies.

1 高炉
2 高炉ガス
3 集塵設備
4 高炉ダスト
5 高炉ダストキャッチャー(DC)
6 ガス洗浄装置
7a〜7f 区画
8 温度計
9 測温部
10 判定部
1 Blast furnace 2 Blast furnace gas 3 Dust collection equipment 4 Blast furnace dust 5 Blast furnace dust catcher (DC)
6 Gas cleaning devices 7a to 7f Section 8 Thermometer 9 Temperature measuring unit 10 Determination unit

Claims (3)

高炉ダストキャッチャーにおける高炉ダスト堆積レベルの検出方法であって、
前記高炉ダストキャッチャーの内部の温度を測定する温度計を備え、
前記温度計の測定値より、所定時間当たりの温度変化量を算出し、前記温度変化量と予め設定した規定値とを比較して、前記温度変化量が前記規定値よりも少ない状態が一定時間以上継続したときに、前記温度計の位置に高炉ダストが有ると判定することを特徴とする、高炉ダスト堆積レベルの検出方法。
A method for detecting a blast furnace dust accumulation level in a blast furnace dust catcher,
A thermometer for measuring the temperature inside the blast furnace dust catcher,
The temperature change amount per predetermined time is calculated from the measured value of the thermometer, and the temperature change amount is compared with a preset specified value, and the state where the temperature change amount is less than the specified value is a predetermined time. A method for detecting a blast furnace dust accumulation level, characterized in that it is determined that blast furnace dust is present at the position of the thermometer when the above is continued .
前記高炉ダストキャッチャーの底部を高さ方向に複数の区画に分けて、前記複数の区画にそれぞれ温度計を配置することを特徴とする、請求項1に記載の高炉ダスト堆積レベルの検出方法。 2. The method for detecting a blast furnace dust accumulation level according to claim 1 , wherein a bottom portion of the blast furnace dust catcher is divided into a plurality of sections in a height direction, and thermometers are respectively disposed in the plurality of sections . 高炉ダストキャッチャーにおける高炉ダスト堆積レベルの検出装置であって、
前記高炉ダストキャッチャーの内部の温度を測定する温度計と、
前記温度計の測定値より、所定時間当たりの温度変化量を算出し、前記温度変化量と予め設定した規定値とを比較して、前記温度変化量が前記規定値よりも少ない状態が一定時間以上継続したときに、前記温度計の位置に高炉ダストが有ると判定する判定部と、を有することを特徴とする、高炉ダスト堆積レベルの検出装置。
An apparatus for detecting a blast furnace dust accumulation level in a blast furnace dust catcher,
A thermometer for measuring the temperature inside the blast furnace dust catcher;
The temperature change amount per predetermined time is calculated from the measured value of the thermometer, and the temperature change amount is compared with a preset specified value, and the state where the temperature change amount is less than the specified value is a predetermined time. A blast furnace dust accumulation level detection device, comprising: a determination unit that determines that blast furnace dust is present at the position of the thermometer when continuing .
JP2012269073A 2012-12-10 2012-12-10 Method and apparatus for detecting blast furnace dust accumulation level Active JP6020111B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012269073A JP6020111B2 (en) 2012-12-10 2012-12-10 Method and apparatus for detecting blast furnace dust accumulation level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2012269073A JP6020111B2 (en) 2012-12-10 2012-12-10 Method and apparatus for detecting blast furnace dust accumulation level

Publications (2)

Publication Number Publication Date
JP2014114478A JP2014114478A (en) 2014-06-26
JP6020111B2 true JP6020111B2 (en) 2016-11-02

Family

ID=51170797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012269073A Active JP6020111B2 (en) 2012-12-10 2012-12-10 Method and apparatus for detecting blast furnace dust accumulation level

Country Status (1)

Country Link
JP (1) JP6020111B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108993058A (en) * 2018-07-12 2018-12-14 佛山市高捷工业炉有限公司 A kind of electromagnetism smelting furnace smoke abatement controlling terminal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910022U (en) * 1982-07-13 1984-01-21 住友金属工業株式会社 level measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108993058A (en) * 2018-07-12 2018-12-14 佛山市高捷工业炉有限公司 A kind of electromagnetism smelting furnace smoke abatement controlling terminal

Also Published As

Publication number Publication date
JP2014114478A (en) 2014-06-26

Similar Documents

Publication Publication Date Title
KR101275035B1 (en) Process for predicting the emergence of longitudinal cracks during continuous casting
JP6020111B2 (en) Method and apparatus for detecting blast furnace dust accumulation level
JP5585519B2 (en) Evaluation method of furnace wall deposits and blast furnace operation method
JP6904202B2 (en) Kilnbeco occurrence detection system and kilnbeco occurrence detection method
JP2021131222A (en) Method for detecting material charge pipe clogging, method for dissolving material charge pipe clogging, and melting facility
JP4150127B2 (en) Fluidized bed abnormal combustion diagnostic method and fluidized bed abnormal combustion diagnostic apparatus
JP6079670B2 (en) Breakout prediction method in continuous casting equipment.
JP5907343B2 (en) Coke cake extrusion method
JP5482418B2 (en) Breakout prediction method
JP2010253504A (en) Method for detecting cast slab joint part in continuous casting
KR20140002212A (en) Judgment method of gas distribution of blast furnace
JP5920579B2 (en) Coke oven furnace body management method
JP2007262438A (en) Method for controlling stock quantity of blast furnace dust
JPS5946702B2 (en) Continuous casting mold
JP6347236B2 (en) Breakout prediction method, breakout prediction apparatus, and continuous casting method
JP2008223121A (en) Method for repairing furnace wall surface at upper part of blast furnace shaft
JPH07294218A (en) Measuring method for width and shrinking rate of coke cake
JP5593801B2 (en) Breakout prediction method for continuous casting
JP6015254B2 (en) Method and apparatus for detecting dust deposits
JP5347727B2 (en) Continuous casting machine and slab surface vertical crack occurrence prediction method
KR101246461B1 (en) Judgment method for central area of blast furnace
JP2002038210A (en) Thickness measuring device for deposit on inner wall of blast furnace and operation method for the furnace
JP6330740B2 (en) Apparatus and method for determining accuracy of measured temperature value
JP2000178618A (en) Method for predicting condition of blast furnace
JP4291764B2 (en) Blast furnace operation method

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20150805

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20160721

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20160726

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20160817

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20160906

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20160919

R151 Written notification of patent or utility model registration

Ref document number: 6020111

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350