JPH07119915A - Malfunction sensing method for coke dry type fire extinguishing facility - Google Patents
Malfunction sensing method for coke dry type fire extinguishing facilityInfo
- Publication number
- JPH07119915A JPH07119915A JP5292585A JP29258593A JPH07119915A JP H07119915 A JPH07119915 A JP H07119915A JP 5292585 A JP5292585 A JP 5292585A JP 29258593 A JP29258593 A JP 29258593A JP H07119915 A JPH07119915 A JP H07119915A
- Authority
- JP
- Japan
- Prior art keywords
- value
- flow rate
- rate difference
- predetermined time
- coke dry
- 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.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Coke Industry (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、コークス乾式消火設
備の操業中における廃熱ボイラーのボイラーチューブが
破損等の異常検知方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for detecting abnormality such as breakage of a boiler tube of a waste heat boiler during the operation of coke dry fire extinguishing equipment.
【0002】[0002]
【従来の技術】従来、コークス炉から窯出しされた赤熱
コークスの消火は、赤熱コークスを積載した消火車を消
火塔に移動させ、上部から大量の水を散水して消火する
湿式消火が採用されていた。しかしながら、赤熱コーク
スの湿式消火は、赤熱コークスの保有する膨大な熱量が
蒸気となって大気中に逃散するばかりでなく、発生する
水蒸気に同伴されて粉コークスが周囲近郊に飛散して公
害問題を惹起することとなる。このため、最近の赤熱コ
ークスの消火は、赤熱コークスの保有する膨大な熱量の
有効利用、コークスの品質向上、粉塵公害の問題を解決
ないしは低減できるコークス乾式消火が主流になってい
る。2. Description of the Related Art Conventionally, for extinguishing red hot coke discharged from a coke oven, a fire extinguisher loaded with red hot coke is moved to a fire extinguisher tower, and a large amount of water is sprinkled from the upper part to extinguish the wet type of fire. Was there. However, wet-type extinguishing of red hot coke not only causes the enormous amount of heat of red hot coke to escape into the atmosphere as steam, but it also accompanies the generated steam and scatters powder coke to the surrounding suburbs, causing pollution problems. It will cause it. For this reason, as for the recent extinguishing of the red hot coke, the mainstream is the coke dry extinguishing which can effectively use the enormous amount of heat of the red hot coke, improve the quality of the coke, and solve or reduce the problem of dust pollution.
【0003】コークス乾式消火設備は、コークス炉で乾
留した赤熱コークスをバケット車に搭載したコークバケ
ットに受け、プリチャンバーと冷却室からなる冷却塔の
頂部に巻上機によりコークバケットを巻上げ、プリチャ
ンバー頂部の装入蓋を開放して装入し、プリチャンバー
下方の冷却室下部に設けた循環不活性ガス吹込み口から
導入される循環不活性ガスと熱交換させて200℃前後
まで冷却したのち、底部のコークス切出し装置で順次一
定量づつ切出して高炉に搬送している。赤熱コークスと
熱交換して800℃近くまで昇温した不活性ガスは、プ
リチャンバーと冷却室との境界部の周囲に設けた小煙道
からプリチャンバー外周壁内の円環煙道を経て煙道に至
り、煙道内に設けた除塵格子煉瓦からなる一次除塵器で
一次除塵したのち、廃熱ボイラーに導入して熱回収し、
サイクロン等で二次除塵して循環ブロワにより再度冷却
室下部に設けた循環不活性ガス吹込み口から吹込まれ
る。Coke dry fire extinguishing equipment receives red hot coke that has been carbonized in a coke oven in a coke bucket mounted on a bucket car, and hoists the coke bucket at the top of a cooling tower consisting of a prechamber and a cooling chamber. After the charging lid at the top is opened and charged, the heat is exchanged with the circulating inert gas introduced from the circulating inert gas inlet provided in the lower portion of the cooling chamber below the pre-chamber, and the temperature is cooled to around 200 ° C. Then, the coke cutting device at the bottom cuts out a fixed amount one by one and conveys it to the blast furnace. The inert gas that has exchanged heat with the red hot coke and has risen to a temperature near 800 ° C smoke from the small flue provided around the boundary between the pre-chamber and the cooling chamber through the circular flue in the outer wall of the pre-chamber. After reaching the road, the primary dust remover made of dust-removing grid bricks installed in the flue is used for primary dust removal, and then introduced into a waste heat boiler to recover heat.
Secondary dust is removed with a cyclone, etc., and then blown again by the circulating blower from the circulating inert gas inlet provided in the lower part of the cooling chamber.
【0004】上記コークス乾式消火設備の循環不活性ガ
スは、殆どが窒素ガスおよび二酸化炭素ガスであり、ま
た、赤熱コークスから発生する可燃性の水素ガス、一酸
化炭素ガスが含まれている。このため、循環不活性ガス
は、煙道内において吹込まれる希釈空気によって可燃性
の水素ガス、一酸化炭素ガスを燃焼させ、爆発限界に入
らないようにしている。さらに、コークス乾式消火設備
の廃熱ボイラーは、労働安全衛生法によって定期検査が
義務付けられている。Most of the circulating inert gas in the coke dry fire extinguishing equipment is nitrogen gas and carbon dioxide gas, and also contains combustible hydrogen gas and carbon monoxide gas generated from red hot coke. Therefore, the circulating inert gas burns the combustible hydrogen gas and carbon monoxide gas by the dilution air blown into the flue gas so as not to enter the explosion limit. Furthermore, the waste heat boiler of coke dry fire extinguishing equipment is required to be inspected regularly by the Industrial Safety and Health Law.
【0005】上記コークス乾式消火設備の廃熱ボイラー
のチューブ破損等の異常検知方法としては、ボイラー出
入口およびボイラー内部に設置した圧力計の測定値の圧
力差によってボイラー内部への小塊コークス、粉コーク
スの付着、堆積量を推定し、この推定付着堆積量が所定
値以上になると、付着堆積コークスが壊れてボイラー内
部を循環不活性ガスと共に流下し、このコークスのボイ
ラーチューブへの衝突や摩擦によってボイラーチューブ
破損が発生することを予測する方法(特開平3−217
488号公報)、ボイラーチューブの破損による漏水等
の異常をガス循環系のガス成分の分析により水素、一酸
化炭素、二酸化炭素、酸素の成分比を測定し、これらの
測定値とガス循環系のマスバランスから決定される水の
成分比を求め、この計算上の水の成分比の値が負または
所定値より低くなった場合、および水の成分比の実績値
を測定し、水の成分比の計算値と実績値との差が所定値
より大きくなった場合にボイラーチューブの漏水と判断
する方法(特開昭64−51490号公報)等が提案さ
れている。As a method for detecting an abnormality such as a tube breakage of a waste heat boiler of the above-mentioned coke dry fire extinguishing equipment, small coke and powder coke into the boiler due to a pressure difference between a boiler inlet / outlet and a pressure gauge measurement value installed inside the boiler. When the estimated deposition amount of deposits exceeds a predetermined value, the deposit deposition coke breaks and flows down with the circulating inert gas inside the boiler, and the coke collides with the boiler tube and friction causes the boiler. A method for predicting tube breakage (Japanese Patent Laid-Open No. 3-217)
No. 488), abnormalities such as water leakage due to breakage of the boiler tube are analyzed by analyzing the gas components of the gas circulation system to measure the component ratios of hydrogen, carbon monoxide, carbon dioxide, and oxygen. Obtain the water component ratio determined from the mass balance, and when the calculated water component ratio value is negative or lower than a specified value, and the actual water component ratio value is measured to determine the water component ratio. There has been proposed a method (Japanese Patent Laid-Open No. 64-51490) of determining water leakage in a boiler tube when the difference between the calculated value and the actual value is larger than a predetermined value.
【0006】[0006]
【発明が解決しようとする課題】上記特開平3−217
488号公報に開示の方法は、初期のコークス乾式消火
設備で付着堆積コークス量が増加するとボイラーチュー
ブの破損が頻発するという傾向にあったため、近年では
ボイラーチューブにカバーを設置する等摩耗対策が十分
に行われており、また、ボイラー内へのコークスの付着
堆積を低減させる工夫がなされており、付着堆積コーク
スのボイラーチューブへの衝突や摩擦による摩耗によっ
て発生するボイラーチューブ破損の頻度が低減してい
る。そのため、最近では付着堆積コークス以外の外乱要
因によるボイラーチューブ破損の頻度が上昇し、推定精
度の誤差が拡大しており、推定精度の維持は困難であ
る。また、特開昭64−51490号公報に開示の方法
は、水素、一酸化炭素、二酸化炭素、酸素、水と多数の
ガス成分を分析する必要があり、連続的にこれらの成分
を測定することは技術的に困難であり、通常1台の分析
装置でこれだけの数のガス成分を分析するには数分間を
要するため、ガス成分の変動により漏水を即時に検知す
るには、例えば、(分析する対象ガス成分の数)×(測
定箇所数)というようにかなりの数のガス分析装置を設
置する必要が生じる。一方、ガス分析装置は、ガスの除
塵装置や除湿装置、ガス成分の分析装置というように大
がかりで、設備費用もかなり大きなもので、これを数台
設置することは設備投資が多大になりすぎて異常検知の
システムとしては見合わないものとなる。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
The method disclosed in Japanese Patent No. 488 has a tendency that the boiler tube frequently breaks when the amount of adhered and deposited coke increases in the early stage coke dry fire extinguishing equipment. In recent years, therefore, wear countermeasures such as installing a cover on the boiler tube are sufficient. In addition, measures have been taken to reduce the adhesion and deposition of coke in the boiler, reducing the frequency of boiler tube damage that occurs due to abrasion of the adhered deposition coke on the boiler tube and friction. There is. Therefore, recently, the frequency of boiler tube breakage due to disturbance factors other than the adhered and deposited coke has increased, and the error in estimation accuracy has increased, making it difficult to maintain estimation accuracy. Further, the method disclosed in JP-A-64-51490 requires analysis of hydrogen, carbon monoxide, carbon dioxide, oxygen, water and a large number of gas components, and continuously measures these components. Is technically difficult, and it usually takes several minutes to analyze such a number of gas components with one analyzer, so to detect water leakage immediately due to changes in gas components, for example, (Analysis It is necessary to install a considerable number of gas analyzers such as (the number of target gas components to be processed) × (the number of measurement points). On the other hand, gas analyzers are large, such as gas dust removers, dehumidifiers, and gas component analyzers, and their equipment costs are also quite large.Installing several of these equipment would require too much capital investment. It is not suitable as an anomaly detection system.
【0007】この発明の目的は、新たにセンサーを設置
することなく、通常のコークス乾式消火設備に従来設置
されているセンサーを利用し、早期に廃熱ボイラーの異
常を検知できるコークス乾式消火設備の異常検知方法を
提供することにある。An object of the present invention is to provide a coke dry fire extinguishing equipment which can detect an abnormality of a waste heat boiler at an early stage by utilizing a sensor conventionally installed in a normal coke dry extinguishing equipment without newly installing a sensor. It is to provide an abnormality detection method.
【0008】[0008]
【課題を解決するための手段】本発明者らは、上記目的
を達成すべく種々試験研究を重ねた。その結果、ボイラ
ーチューブからの漏水は、ボイラーへの給水量とボイラ
ーからの発生蒸気量の差分の瞬時値および積算値を監視
することによって、瞬時値のみでは見逃されがちな微少
なボイラーチューブ破損による漏水量をも検知可能とな
ること、また、ボイラーチューブ破損により蒸気が流出
して冷却塔に流入すると、赤熱コークスと接触反応して
プリチャンバー内部の圧力が上昇するので、プリチャン
バー圧力を監視し、通常の圧力制御状態と比較すること
によって、ボイラーチューブの破損検知が可能であるこ
とを確認し、この発明に到達した。[Means for Solving the Problems] The present inventors have conducted various test studies in order to achieve the above object. As a result, water leakage from the boiler tube is caused by minute damage to the boiler tube, which is often overlooked by the instantaneous value only, by monitoring the instantaneous value and integrated value of the difference between the amount of water supplied to the boiler and the amount of steam generated from the boiler. It is also possible to detect the amount of water leakage, and when steam flows out into the cooling tower due to breakage of the boiler tube, the pressure inside the pre-chamber rises due to contact reaction with red hot coke, so the pre-chamber pressure is monitored. It was confirmed that it is possible to detect breakage of the boiler tube by comparing with a normal pressure control state, and the present invention has been reached.
【0009】すなわち本願の第1の発明は、コークス乾
式消火設備の廃熱ボイラーの異常検知方法において、廃
熱ボイラーへの給水量と発生蒸気量との流量差を演算し
て流量差の瞬時値と予め定めた所定時間内の積算値の平
均値を求め、前記流量差の瞬時値または所定時間内の積
算値の平均値と、予め定めたそれぞれの設定値を比較
し、前記流量差の瞬時値または所定時間内の積算値の平
均値のいずれかが予め定めたそれぞれの設定値を超える
とボイラーチューブ破損と判定することを特徴とするコ
ークス乾式消火設備の異常検知方法である。That is, the first invention of the present application is a method for detecting an abnormality of a waste heat boiler of a coke dry fire extinguishing system, in which an instantaneous value of the flow rate difference is calculated by calculating a flow rate difference between the amount of water supplied to the waste heat boiler and the amount of steam generated. Then, the average value of the integrated values within a predetermined time is determined, and the instantaneous value of the flow rate difference or the average value of the integrated values within the predetermined time is compared with the respective preset values to determine the instantaneous value of the flow rate difference. A method for detecting an abnormality in a coke dry fire extinguisher facility, characterized in that it is determined that the boiler tube is broken when either the value or the average value of integrated values within a predetermined time exceeds respective preset values.
【0010】また、本願の第2の発明は、コークス乾式
消火設備の廃熱ボイラーの異常検知方法において、コー
クス乾式消火設備操業中にプリチャンバー内圧力が制御
された状態下で、プリチャンバー内圧力と装入蓋の開閉
を検出し、予め定めた装入蓋の開時または閉時の圧力設
定値と比較し、それぞれの検出値が設定値を超えた場
合、あるいは装入蓋閉時の検出値が予め定めた設定値を
所定時間連続して超えた場合にボイラーチューブ破損と
判定することを特徴とするコークス乾式消火設備の異常
検知方法である。The second invention of the present application is a method for detecting an abnormality in a waste heat boiler of a coke dry fire extinguisher, wherein the prechamber internal pressure is controlled while the prechamber internal pressure is controlled during operation of the coke dry fire extinguishing equipment. And the opening / closing of the charging lid are detected and compared with a preset pressure setting value when the charging lid is opened or closed, and when each detected value exceeds the set value, or when the charging lid is closed A method for detecting an abnormality in a coke dry fire extinguishing facility, characterized in that it is determined that a boiler tube is damaged when the value continuously exceeds a predetermined set value for a predetermined time.
【0011】さらに、本願の第3の発明は、コークス乾
式消火設備の廃熱ボイラーの異常検知方法において、廃
熱ボイラーへの給水量と発生蒸気量との流量差を演算し
て流量差の瞬時値と予め定めた所定時間内の積算値の平
均値を求め、前記流量差の瞬時値または所定時間内の積
算値の平均値と予め定めたそれぞれの設定値を比較し、
前記流量差の瞬時値または所定時間内の積算値の平均値
のいずれかが予め定めたそれぞれの設定値を超えるか、
あるいはコークス乾式消火設備操業中にプリチャンバー
内圧力が制御された状態下で、プリチャンバー内圧力と
装入蓋の開閉を検出し、予め定めた装入蓋の開時または
閉時の圧力設定値と比較し、それぞれの検出値が設定値
を超えた場合、あるいは装入蓋閉時に予め定めた設定値
を所定時間連続して超えた場合のいずれかの時に、ボイ
ラーチューブ破損と判定することを特徴とするコークス
乾式消火設備の異常検知方法である。Further, a third invention of the present application is a method for detecting an abnormality of a waste heat boiler of a coke dry fire extinguishing facility, in which the difference in flow rate between the amount of water supplied to the waste heat boiler and the amount of generated steam is calculated to determine the instantaneous difference in flow rate. Obtain an average value of the integrated value within a predetermined time and a predetermined value, and compare the instantaneous value of the flow rate difference or the average value of the integrated value within a predetermined time with each of the preset setting values,
Whether any of the instantaneous value of the flow rate difference or the average value of the integrated values within a predetermined time exceeds each preset setting value,
Alternatively, the pre-chamber pressure and the opening / closing of the charging lid are detected while the pre-chamber pressure is controlled during the operation of the coke dry fire extinguishing equipment, and the preset pressure setting value when the charging lid is opened or closed. If the detected value exceeds the preset value, or if the preset value is continuously exceeded for a predetermined time when the charging lid is closed, it is judged that the boiler tube is damaged. This is a characteristic method for detecting abnormalities in coke dry fire extinguishing equipment.
【0012】[0012]
【作用】この発明においては、通常のコークス乾式消火
設備に操業監視のために設置されている廃熱ボイラーへ
の給水量、発生蒸気量、プリチャンバー内圧力および装
入蓋開閉を検出するセンサーを利用し、これらの各セン
サーを演算器に接続し、演算結果をボイラーチューブ破
損検知装置に入力する。そして第1発明においては、廃
熱ボイラーへの給水量と発生蒸気量との流量差を演算し
て流量差の瞬時値と予め定めた所定時間内の瞬時値の積
算値の平均値を求める。ボイラーチューブが破損してい
る場合は、破損部からの漏水、漏蒸気によってボイラー
への給水量と発生蒸気量には流量差が生じる。この流量
差の瞬時値および予め定めた所定時間内の積算値の平均
値と予め定めたそれぞれの設定値を比較し、前記流量差
の瞬時値または所定時間内の積算値の平均値のいずれか
が予め定めたそれぞれの設定値を超えるとボイラーチュ
ーブ破損と判定することによって、給水量と発生蒸気量
との流量差の瞬時値のみでは見逃されがちな微少なボイ
ラーチューブ破損による漏水をも検知することが可能と
なる。なお、所定時間内の瞬時値の積算値の平均値は、
予め定めた所定時間の瞬時値の積算値の平均値を一定時
間毎に更新していくものであっても、瞬時値の予め定め
た所定時間内での移動積算値の平均値であってもよい。In the present invention, a sensor for detecting the amount of water supplied to the waste heat boiler, the amount of generated steam, the pressure in the pre-chamber, and the opening / closing of the charging lid is installed in the ordinary coke dry fire extinguishing equipment for operation monitoring. Utilizing this, each of these sensors is connected to a computing unit, and the computation result is input to the boiler tube breakage detection device. In the first invention, the flow rate difference between the amount of water supplied to the waste heat boiler and the amount of generated steam is calculated to obtain the average value of the instantaneous value of the flow rate difference and the integrated value of the instantaneous values within a predetermined time. When the boiler tube is damaged, there is a difference in flow rate between the amount of steam supplied to the boiler and the amount of steam generated due to water leakage and steam leakage from the damaged part. The instantaneous value of the flow rate difference and the average value of the integrated values within a predetermined time period are compared with the respective preset values, and either the instantaneous value of the flow rate difference or the average value of the integrated values within the predetermined time period is compared. If it exceeds each preset value, it is judged that the boiler tube is broken, and it is possible to detect even a small amount of water leakage due to the breakage of the boiler tube, which is often overlooked only by the instantaneous value of the flow rate difference between the water supply amount and the generated steam amount. It becomes possible. In addition, the average value of the integrated value of the instantaneous value within the predetermined time is
Even if the average value of the integrated values of the instantaneous values for a predetermined time period is updated at regular time intervals, or if it is the average value of the moving integrated values within the predetermined time period for the instantaneous value Good.
【0013】また、通常コークス乾式消火設備操業中
は、上部および下部放散管に設置された開閉弁の調整に
よって、プリチャンバー内圧力は一定となるように制御
されている。第2発明においては、コークス乾式消火設
備操業中にプリチャンバー内圧力が制御された状態下
で、プリチャンバー内圧力と装入蓋の開閉を検出する。
ボイラーチューブが破損している場合は、破損部からの
漏水、漏蒸気が系内を伝わって冷却室内に流入して赤熱
コークスと接触した場合、水と赤熱コークスとの水性反
応によってガスが異常発生し、プリチャンバー内の圧力
が上昇する。一方、コークス乾式消火設備の操業におい
ては、装入蓋の開閉操作が実施されるため、予め装入蓋
の開時または閉時においてそれぞれ圧力設定値を設定し
ておき、装入蓋が開時または閉時において、予め定めた
装入蓋の開時または閉時の設定値と比較し、それぞれの
検出値が設定値を超えた場合、あるいは装入蓋閉時に予
め定めた設定値を所定時間連続して超えた場合にボイラ
ーチューブ破損と判定する。During normal coke dry fire extinguishing equipment operation, the pressure inside the pre-chamber is controlled to be constant by adjusting the on-off valves installed in the upper and lower diffusion pipes. In the second aspect of the present invention, the pre-chamber internal pressure and the opening / closing of the charging lid are detected while the pre-chamber internal pressure is controlled during the operation of the coke dry fire extinguishing equipment.
If the boiler tube is damaged, if water or steam leaking from the damaged part travels through the system and flows into the cooling chamber and comes into contact with red hot coke, an abnormal gas will be generated due to the aqueous reaction between water and red hot coke. Then, the pressure in the pre-chamber rises. On the other hand, when operating the coke dry fire extinguishing equipment, the charging lid is opened and closed.Therefore, set the pressure setting value when the charging lid is opened or closed, and when the charging lid is opened. Or, when the charging lid is closed, it is compared with a preset setting value when the charging lid is opened or closed, and when each detected value exceeds the setting value, or when the charging lid is closed, the preset value is set for a predetermined time If it exceeds continuously, it is judged that the boiler tube is damaged.
【0014】さらに、第3発明においては、廃熱ボイラ
ーへの給水量と発生蒸気量との流量差を演算して流量差
の瞬時値と予め定めた所定時間内の積算値の平均値を求
め、この流量差の瞬時値および予め定めた所定時間内の
積算値の平均値と予め定めたそれぞれの設定値を比較
し、前記流量差の瞬時値または所定時間内の積算値の平
均値のいずれかがが予め定めたそれぞれの設定値を超え
ると、あるいはコークス乾式消火設備操業中にプリチャ
ンバー内圧力が制御された状態下で、プリチャンバー内
圧力と装入蓋の開閉を検出し、装入蓋が開時または閉時
において、予め定めた装入蓋の開時または閉時の圧力設
定値と比較し、それぞれの検出値が設定値を超えた場
合、あるいは装入蓋閉時に予め定めた設定値を所定時間
連続して超えた場合にのいずれかの時に、ボイラーチュ
ーブ破損と判定することによって、ボイラーチューブ破
損検知の精度が向上する。Further, in the third invention, the flow rate difference between the amount of water supplied to the waste heat boiler and the amount of generated steam is calculated to obtain the instantaneous value of the flow rate difference and the average value of the integrated values within a predetermined time. Comparing the instantaneous value of the flow rate difference and the average value of the integrated values within a predetermined time period with each of the preset setting values, whichever of the instantaneous value of the flow rate difference or the average value of the integrated values within the predetermined time period. When the pressure exceeds each preset value, or when the pre-chamber pressure is controlled while the coke dry fire extinguisher is operating, the pre-chamber pressure and the opening / closing of the charging lid are detected, and charging is performed. When the lid is opened or closed, it is compared with a preset pressure set value when the charging lid is opened or closed, and when each detected value exceeds the set value, or when the charging lid is closed, it is determined in advance. When the set value is continuously exceeded for a predetermined time When one, by determining the boiler tube failure, which improves the accuracy of the boiler tube breakage detection.
【0015】[0015]
【実施例】以下にこの発明方法の詳細を実施の一例を示
す図1ないし図2に基づいて説明する。図1はこの発明
方法を実施するコークス乾式消火装置におけるセンサ
ー、演算器等の装置構成の説明図、図2はこの発明方法
のボイラー異常検知システムのシーケンス図である。図
1において、1はプリチャンバー2と冷却室3からなる
冷却塔、4はコークス炉から窯出しされた赤熱コークス
を積載するコークバケット、5はコークバケット4を搬
送するバケット台車、6は巻上げ機で、赤熱コークスを
積載したコークバケット4を巻上げて冷却塔1の直上ま
で横行し、プリチャンバー2の装入蓋7を開放して赤熱
コークスを投入する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the method of the present invention will be described below with reference to FIGS. FIG. 1 is an explanatory view of a device configuration of a sensor, a computing unit, etc. in a coke dry fire extinguisher for carrying out the method of the present invention, and FIG. In FIG. 1, 1 is a cooling tower composed of a pre-chamber 2 and a cooling chamber 3, 4 is a coke bucket for loading red hot coke discharged from a coke oven, 5 is a bucket truck for carrying the coke bucket 4, and 6 is a hoist. Then, the coke bucket 4 loaded with the red hot coke is rolled up and traversed right above the cooling tower 1, the charging lid 7 of the pre-chamber 2 is opened, and the red hot coke is charged.
【0016】8は冷却室3の下部に設けた循環不活性ガ
ス吹込み口で、冷却塔1内を下降する赤熱コークスは、
循環不活性ガス吹込み口8から吹込まれる循環不活性ガ
スと熱交換して200℃程度まで冷却され、冷却室3の
底部のコークス切出し装置9で順次切出され、搬送コン
ベア10により次工程に搬送される。赤熱コークスと熱
交換して800℃程度に昇温した循環不活性ガスは、プ
リチャンバー2外周部の円環煙道11を経て煙道12に
至り、図示しない一次除塵器で一次除塵されたのち、廃
熱ボイラー13において熱回収され、サイクロン14で
さらに除塵されたのち、循環ブロワ15により循環不活
性ガス吹込み口8から吹込まれる。Reference numeral 8 is a circulating inert gas inlet provided in the lower portion of the cooling chamber 3, and the red hot coke descending in the cooling tower 1 is
It is cooled to about 200 ° C. by exchanging heat with the circulating inert gas blown from the circulating inert gas blowing port 8, sequentially cut by the coke cutting device 9 at the bottom of the cooling chamber 3, and then conveyed by the conveyor 10 to the next step. Be transported to. The circulating inert gas that has exchanged heat with the red hot coke and has been heated to about 800 ° C. reaches the flue 12 via the annular flue 11 at the outer periphery of the pre-chamber 2 and is subjected to primary dust removal by a not-shown primary dust remover. The waste heat boiler 13 recovers heat, the cyclone 14 further removes dust, and the circulating blower 15 blows the inert gas through the circulation inert gas inlet 8.
【0017】21はプリチャンバー2に設けた圧力検出
用のセンサーで、検出した圧力をプリチャンバー圧力制
御装置22およびプリチャンバー圧力監視装置23に出
力する。プリチャンバー圧力制御装置22は、センサー
21から入力されるプリチャンバー2内圧力と、予め定
めた圧力設定値を比較し、プリチャンバー2内圧力が設
定値を超えると、上部放散弁24または下部放散弁25
を開放してガス放散し、プリチャンバー2内圧力を設定
値に制御する。プリチャンバー圧力監視装置23は、セ
ンサー21から入力されるプリチャンバー2内圧力と、
別途入力される装入蓋7の開または閉信号に基づき、予
め定めた装入蓋7が開時または閉時の設定圧力(例えば
20mmAqまたは100mmAq)と比較し、プリチ
ャンバー2内圧力が設定値を超えるた場合、または装入
蓋7が閉時に予め定めた設定圧力(例えば50mmA
q)を所定時間連続して超えた場合、ボイラーチューブ
破損検知装置26に出力するよう構成する。Reference numeral 21 is a pressure detecting sensor provided in the pre-chamber 2, and outputs the detected pressure to the pre-chamber pressure control device 22 and the pre-chamber pressure monitoring device 23. The pre-chamber pressure control device 22 compares the internal pressure of the pre-chamber 2 input from the sensor 21 with a predetermined pressure set value, and when the internal pressure of the pre-chamber 2 exceeds the set value, the upper diffusion valve 24 or the lower diffusion valve 24 is released. Valve 25
To release the gas and control the pressure inside the pre-chamber 2 to a set value. The pre-chamber pressure monitoring device 23 detects the pressure inside the pre-chamber 2 input from the sensor 21,
Based on a separately input signal for opening or closing the charging lid 7, the pressure inside the pre-chamber 2 is compared with a preset pressure when the charging lid 7 is opened or closed (for example, 20 mmAq or 100 mmAq). Is exceeded, or when the charging lid 7 is closed, a preset pressure (for example, 50 mmA)
When q) is continuously exceeded for a predetermined time, it is configured to output to the boiler tube breakage detection device 26.
【0018】27は廃熱ボイラー13への給水量検出用
のセンサー、28は廃熱ボイラー13の発生蒸気量検出
用のセンサーで、センサー27、28で検出された給水
量および発生蒸気量は、流量差演算器29に出力され
る。流量差演算器29は、センサー27、28から入力
される廃熱ボイラー13への給水量と発生蒸気量とから
流量差を演算し、その瞬時値とその瞬時値の所定時間の
積算値の平均値を求め、予め定めた設定瞬時値(例えば
10.0t/h)および設定積算値の平均値(例えば
5.0t/h)と比較し、瞬時値または所定時間の積算
値の平均値のいずれかが設定瞬時値または設定積算値の
平均値を超えると、ボイラーチューブ破損検知装置26
に出力するよう構成する。ボイラーチューブ破損検知装
置26は、図2に示すとおり、プリチャンバー圧力監視
装置23から入力されるプリチャンバー2内圧力が設定
値を超えた信号、または装入蓋7が閉時に予め定めた設
定値を所定時間連続して超えた信号、および流量差演算
器29から入力される瞬時値または所定時間の積算値の
平均値のいずれかが設定瞬時値またはび設定積算値の平
均値を超えた信号に基づいて、ボイラーチューブ破損を
判定し、警報を発すると共に、図示しない燃焼用空気フ
ァン停止、コークス切出し停止、コークス投入停止、系
内ガス放散弁開放、系内窒素ガスパージを指令するよう
構成する。なお、図2中の30はオア回路、31はアン
ド回路を示す。27 is a sensor for detecting the amount of water supplied to the waste heat boiler 13, 28 is a sensor for detecting the amount of steam generated by the waste heat boiler 13, and the amount of water supplied and the amount of steam generated by the sensors 27, 28 are It is output to the flow rate difference calculator 29. The flow rate difference calculator 29 calculates a flow rate difference from the amount of water supplied to the waste heat boiler 13 and the amount of steam generated, which are input from the sensors 27 and 28, and averages the instantaneous value and the integrated value of the instantaneous values for a predetermined time. The value is calculated and compared with a preset set instantaneous value (for example, 10.0 t / h) and an average value of set integrated values (for example, 5.0 t / h) to determine whether it is an instantaneous value or an average value of integrated values for a predetermined time. When the value exceeds the set instantaneous value or the average of the set integrated values, the boiler tube breakage detection device 26
To output to. As shown in FIG. 2, the boiler tube damage detection device 26 outputs a signal indicating that the pressure inside the pre-chamber 2 exceeds a set value, which is input from the pre-chamber pressure monitoring device 23, or a set value that is set in advance when the charging lid 7 is closed. For a predetermined time continuously, and a signal for which either the instantaneous value input from the flow rate difference calculator 29 or the average value of the integrated values for the predetermined time exceeds the set instantaneous value or the average value of the set integrated values. On the basis of the above, the boiler tube is judged to be broken, and an alarm is issued, and a command is issued to stop the combustion air fan (not shown), stop coke cutting out, stop coke charging, open system gas release valve, and system nitrogen gas purge. In FIG. 2, 30 is an OR circuit and 31 is an AND circuit.
【0019】上記のとおり構成したことによって、ボイ
ラーチューブが破損した場合は、破損部からの漏水、漏
蒸気によってボイラーへの給水量検出用のセンサー27
と発生蒸気量検出用のセンサー28には流量差が生じ
る。流量演算器29は、この給水量と発生蒸気量の流量
差を演算し、流量差の瞬時値および予め定めた所定時間
内の瞬時値の積算値の平均値を求め、予め入力されてい
る設定瞬時値(例えば10.0t/h)および設定積算
値の平均値(例えば5.0t/h)と比較し、前記流量
差の瞬時値または所定時間内の積算値の平均値のいずれ
かが設定瞬時値および設定積算値の平均値を超えると、
その信号をボイラーチューブ破損検知装置26に出力す
る。With the above construction, when the boiler tube is damaged, the sensor 27 for detecting the amount of water supplied to the boiler due to water leakage and steam leakage from the damaged portion.
And a flow rate difference occurs between the sensor 28 for detecting the amount of generated steam. The flow rate calculator 29 calculates a flow rate difference between the water supply amount and the generated steam amount, obtains an instantaneous value of the flow amount difference and an average value of integrated values of the instantaneous values within a predetermined time, and preset settings are input. An instantaneous value (for example, 10.0 t / h) and an average value of set integrated values (for example, 5.0 t / h) are compared to set either the instantaneous value of the flow rate difference or the average value of integrated values within a predetermined time. When the average value of the instantaneous value and the set integrated value is exceeded,
The signal is output to the boiler tube breakage detection device 26.
【0020】一方、ボイラーチューブ破損部からの漏
水、漏蒸気が系内を伝わって冷却室3内に流入して赤熱
コークスと接触した場合、水と赤熱コークスとの水性反
応によってガスが異常発生し、プリチャンバー2内の圧
力が上昇する。プリチャンバー圧力監視装置23は、セ
ンサー21から入力されるプリチャンバー2内圧力と、
別途入力される装入蓋7の開または閉信号に基づき、予
め定めた装入蓋の開時または閉時の設定値(20mmA
qまたは100mmAq)と比較し、各検出値のいずれ
かが設定値を超えた場合、あるいは装入蓋閉時に予め定
めた設定値(50mmAq)を所定時間連続して超えた
場合にその信号をボイラーチューブ破損検知装置26に
出力する。On the other hand, when water and steam leaking from the damaged portion of the boiler tube flow through the system into the cooling chamber 3 and come into contact with the red hot coke, an abnormal gas is generated due to an aqueous reaction between water and the red hot coke. , The pressure in the pre-chamber 2 rises. The pre-chamber pressure monitoring device 23 detects the pressure inside the pre-chamber 2 input from the sensor 21,
Based on a separately input signal of opening or closing of the charging lid 7, a predetermined set value when the charging lid is opened or closed (20 mmA
q or 100 mmAq), if any of the detected values exceeds the set value, or if the set value (50 mmAq) previously set when the charging lid is closed exceeds the set value continuously for a predetermined time, the signal is sent to the boiler. Output to the tube breakage detection device 26.
【0021】ボイラーチューブ破損検知装置26は、流
量演算器29から入力される流量差の瞬時値または所定
時間内の積算値の平均値のいずれかが設定瞬時値および
設定積算値の平均値を超えたとの信号およびプリチャン
バー圧力監視装置23から入力されるプリチャンバー2
内圧力が予め定めた装入蓋の開時または閉時の設定値
(20mmAqまたは100mmAq)のいずれかを超
えたとの信号および装入蓋閉時に予め定めた設定値(5
0mmAq)を所定時間連続して超えたとの信号に基づ
き、図2に示す判定回路によってボイラーチューブ破損
を判定し、必要な処置を指令する。これによって、この
発明では、給水量と発生蒸気量との流量差の瞬時値のみ
では見逃されがちな微少なボイラーチューブ破損による
漏水をも検知することが可能となると共に、複数の条件
を並行に監視してボイラーチューブ破損を検知するの
で、センサーの故障等の設備異常等の場合においても、
ボイラーチューブ損傷の判定精度を向上できる。In the boiler tube breakage detection device 26, either the instantaneous value of the flow rate difference input from the flow rate calculator 29 or the average value of the integrated values within a predetermined time exceeds the set instantaneous value and the average value of the set integrated values. Pre-chamber 2 that is input from the signal and the pre-chamber pressure monitoring device 23
A signal that the internal pressure exceeds a preset value (20 mmAq or 100 mmAq) when the charging lid is opened or closed, and a preset value (5 when the charging lid is closed).
0 mmAq) is continuously exceeded for a predetermined time based on a signal that the boiler tube is judged to be broken by the judgment circuit shown in FIG. 2 and necessary measures are instructed. As a result, in the present invention, it is possible to detect even a small amount of water leakage due to the breakage of the boiler tube that is often overlooked by the instantaneous value of the flow rate difference between the water supply amount and the generated steam amount. Since it monitors the boiler tube damage by monitoring, even in the case of equipment failure such as sensor failure,
Boiler tube damage determination accuracy can be improved.
【0022】[0022]
【発明の効果】以上述べたとおり、この発明方法によれ
ば、コークス乾式消火設備のボイラーチューブ破損を、
高精度検知できると共に、既設のセンサーを利用するた
めセンサーの設置が皆無で、設備費を低減することがで
きる。As described above, according to the method of the present invention, damage to the boiler tube of the coke dry fire extinguishing equipment can be prevented.
Highly accurate detection is possible, and because existing sensors are used, there is no need to install sensors, and equipment costs can be reduced.
【図1】この発明方法を実施するコークス乾式消火装置
におけるセンサー、演算器等の装置構成の説明図であ
る。FIG. 1 is an explanatory diagram of a device configuration such as a sensor and a computing unit in a coke dry fire extinguisher device for carrying out the method of the present invention.
【図2】この発明方法のボイラー異常検知システムのシ
ーケンス図である。FIG. 2 is a sequence diagram of the boiler abnormality detection system of the method of the present invention.
1 冷却塔 2 プリチャンバー 3 冷却室 4 コークバケット 5 バケット台車 6 巻上げ機 7 装入蓋 8 循環不活性ガス吹込み口 9 コークス切出し装置 10 搬送コンベア 11 円環煙道 12 煙道 13 廃熱ボイラー 14 サイクロン 15 循環ブロワ 21、27、28 センサー 22 プリチャンバー圧力制御装置 23 プリチャンバー圧力監視装置 24 上部放散弁 25 下部放散弁 26 ボイラーチューブ破損検知装置 29 流量差演算器 30 オア回路 31 アンド回路 1 Cooling Tower 2 Pre-chamber 3 Cooling Chamber 4 Coke Bucket 5 Bucket Cart 6 Hoisting Machine 7 Charging Lid 8 Circulating Inert Gas Blow-in Port 9 Coke Cutting Device 10 Transport Conveyor 11 Circular Flue 12 Flue 13 Waste Heat Boiler 14 Cyclone 15 Circulation blower 21, 27, 28 Sensor 22 Pre-chamber pressure control device 23 Pre-chamber pressure monitoring device 24 Upper diffusion valve 25 Lower diffusion valve 26 Boiler tube breakage detection device 29 Flow rate difference calculator 30 OR circuit 31 AND circuit
フロントページの続き (72)発明者 松並 静義 和歌山県和歌山市湊1850番地 住友金属工 業株式会社和歌山製鉄所内 (72)発明者 佐伯 周治 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内 (72)発明者 平田 豊 大阪府大阪市中央区北浜4丁目5番33号 住友金属工業株式会社内Front page continuation (72) Inventor Shizuyoshi Matsunami 1850 Minato, Wakayama, Wakayama Sumitomo Metal Industries, Ltd. Wakayama Steel Works (72) Inventor Shuji Saeki 4-53, Kitahama, Chuo-ku, Osaka, Osaka Sumitomo Metals Industrial Co., Ltd. (72) Inventor Yutaka Hirata 4-53-3 Kitahama, Chuo-ku, Osaka City, Osaka Prefecture Sumitomo Metal Industries, Ltd.
Claims (3)
異常検知方法において、廃熱ボイラーへの給水量と発生
蒸気量との流量差を演算して流量差の瞬時値と予め定め
た所定時間内の積算値の平均値を求め、前記流量差の瞬
時値または所定時間内の積算値の平均値と、予め定めた
それぞれの設定値を比較し、前記流量差の瞬時値または
所定時間内の積算値の平均値のいずれかが予め定めたそ
れぞれの設定値を超えるとボイラーチューブ破損と判定
することを特徴とするコークス乾式消火設備の異常検知
方法。1. A method for detecting an abnormality in a waste heat boiler of a coke dry fire extinguishing system, wherein a flow rate difference between the amount of water supplied to the waste heat boiler and the amount of generated steam is calculated to determine an instantaneous value of the flow rate difference within a predetermined time. The average value of the integrated values of the flow rate difference is calculated, and the average value of the integrated values of the flow rate difference or the integrated value within a predetermined time is compared with each preset setting value, and the instantaneous value of the flow rate difference or the integrated value within the predetermined time is calculated. A method for detecting abnormality in a coke dry fire extinguishing facility, characterized in that if any one of the average values exceeds a predetermined set value, it is determined that the boiler tube is damaged.
異常検知方法において、コークス乾式消火設備操業中に
プリチャンバー内圧力が制御された状態下で、プリチャ
ンバー内圧力と装入蓋の開閉を検出し、予め定めた装入
蓋の開時または閉時の圧力設定値と比較し、それぞれの
検出値が設定値を超えた場合、あるいは装入蓋閉時の検
出値が予め定めた設定値を所定時間連続して超えた場合
にボイラーチューブ破損と判定することを特徴とするコ
ークス乾式消火設備の異常検知方法。2. A method for detecting an abnormality in a waste heat boiler of a coke dry fire extinguisher, wherein the prechamber pressure and the opening / closing of the charging lid are detected while the prechamber pressure is controlled during the operation of the coke dry fire extinguisher. Then, compare with the preset pressure setting value when the charging lid is opened or closed, and if each detected value exceeds the set value, or if the detected value when the charging lid is closed is set to the preset value. A method for detecting an abnormality in a coke dry fire extinguishing facility, characterized in that it is determined that a boiler tube has been damaged when a predetermined time has been exceeded continuously.
異常検知方法において、廃熱ボイラーへの給水量と発生
蒸気量との流量差を演算して流量差の瞬時値と予め定め
た所定時間内の積算値の平均値を求め、前記流量差の瞬
時値または所定時間内の積算値の平均値と予め定めたそ
れぞれの設定値を比較し、前記流量差の瞬時値または所
定時間内の積算値の平均値のいずれかが予め定めたそれ
ぞれの設定値を超えるか、あるいはコークス乾式消火設
備操業中にプリチャンバー内圧力が制御された状態下
で、プリチャンバー内圧力と装入蓋の開閉を検出し、予
め定めた装入蓋の開時または閉時の圧力設定値と比較
し、それぞれの検出値が設定値を超えた場合、あるいは
装入蓋閉時に予め定めた設定値を所定時間連続して超え
た場合のいずれかの時に、ボイラーチューブ破損と判定
することを特徴とするコークス乾式消火設備の異常検知
方法。3. An abnormality detection method for a waste heat boiler of a coke dry fire extinguishing facility, wherein a flow rate difference between the amount of water supplied to the waste heat boiler and the amount of steam generated is calculated to determine an instantaneous value of the flow rate difference within a predetermined time. The average value of the integrated values of the flow rate difference is calculated, and the instantaneous value of the flow rate difference or the average value of the integrated values within a predetermined time is compared with the respective preset values, and the instantaneous value of the flow rate difference or the integrated value within the predetermined time is compared. If either of the average values of the pre-chamber exceeds the respective preset values or the pre-chamber pressure is controlled during the operation of the coke dry fire extinguishing equipment, the pre-chamber pressure and the opening / closing of the charging lid are detected. Then, compare with the preset pressure setting value when the charging lid is opened or closed, and if each detected value exceeds the set value, or if the charging lid is closed, keep the preset setting value for a predetermined time. At any time if exceeded , Coke dry fire extinguishing equipment abnormality detection method characterized by determining that the boiler tube is damaged.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5292585A JP2833449B2 (en) | 1993-10-27 | 1993-10-27 | Abnormality detection method for coke dry fire extinguishing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5292585A JP2833449B2 (en) | 1993-10-27 | 1993-10-27 | Abnormality detection method for coke dry fire extinguishing equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07119915A true JPH07119915A (en) | 1995-05-12 |
JP2833449B2 JP2833449B2 (en) | 1998-12-09 |
Family
ID=17783684
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5292585A Expired - Fee Related JP2833449B2 (en) | 1993-10-27 | 1993-10-27 | Abnormality detection method for coke dry fire extinguishing equipment |
Country Status (1)
Country | Link |
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JP (1) | JP2833449B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009118689A (en) * | 2007-11-08 | 2009-05-28 | Okuma Corp | Controller of motor |
CN114231299A (en) * | 2020-09-09 | 2022-03-25 | 上海梅山钢铁股份有限公司 | Dry quenching boiler tube explosion detection positioning device and safety control method |
CN114231299B (en) * | 2020-09-09 | 2024-08-02 | 上海梅山钢铁股份有限公司 | Dry quenching boiler tube explosion detection positioning device and safety control method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50152790A (en) * | 1974-05-30 | 1975-12-09 | ||
JPH0211804A (en) * | 1988-06-29 | 1990-01-16 | Toshiba Corp | Anomaly detector for moisture separating heater |
JPH0244102A (en) * | 1988-08-04 | 1990-02-14 | Kawasaki Steel Corp | Detecting method for rupture of boiler tube for coke dry type fire extinguishing installation |
-
1993
- 1993-10-27 JP JP5292585A patent/JP2833449B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS50152790A (en) * | 1974-05-30 | 1975-12-09 | ||
JPH0211804A (en) * | 1988-06-29 | 1990-01-16 | Toshiba Corp | Anomaly detector for moisture separating heater |
JPH0244102A (en) * | 1988-08-04 | 1990-02-14 | Kawasaki Steel Corp | Detecting method for rupture of boiler tube for coke dry type fire extinguishing installation |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009118689A (en) * | 2007-11-08 | 2009-05-28 | Okuma Corp | Controller of motor |
CN114231299A (en) * | 2020-09-09 | 2022-03-25 | 上海梅山钢铁股份有限公司 | Dry quenching boiler tube explosion detection positioning device and safety control method |
CN114231299B (en) * | 2020-09-09 | 2024-08-02 | 上海梅山钢铁股份有限公司 | Dry quenching boiler tube explosion detection positioning device and safety control method |
Also Published As
Publication number | Publication date |
---|---|
JP2833449B2 (en) | 1998-12-09 |
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