JP2009277019A - Device and method for determining abnormal operation, and production plant - Google Patents

Device and method for determining abnormal operation, and production plant Download PDF

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JP2009277019A
JP2009277019A JP2008127776A JP2008127776A JP2009277019A JP 2009277019 A JP2009277019 A JP 2009277019A JP 2008127776 A JP2008127776 A JP 2008127776A JP 2008127776 A JP2008127776 A JP 2008127776A JP 2009277019 A JP2009277019 A JP 2009277019A
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raw material
correction value
abnormal operation
supply
normal butene
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JP4881347B2 (en
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Tomohide Hayasaka
友秀 早坂
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SEKIYU COMBINAT KODO TOGO UNEI
Idemitsu Kosan Co Ltd
Research Association of Refinery Integration for Group Operation
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SEKIYU COMBINAT KODO TOGO UNEI
Idemitsu Kosan Co Ltd
Research Association of Refinery Integration for Group Operation
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an abnormal operation determination device, for appropriately detecting a failure of an in-line analyzer. <P>SOLUTION: The abnormal operation determination device 54 of a propylene production plant 1 calculates a correction quantity ratio for equalizing measurement results in a supply measurement means 51 and a receiving measurement means 53 to each other, and determines, when a daily calculation value larger or smaller than an average value of the correction ratio continues a predetermined number of times or more, that in-line analyzers 512, 532 of the measurement means 51, 53 corresponding to the daily calculation value are broken. Therefore, since the average value is compared with the correction quantity ratios based on two or more measurement results, abnormality is detected even if a failure such as gradual change of deviation is caused in the in-line analyzers 512, 532. Abnormal operations of the in-line analyzers 512, 532 are thus appropriately determined. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、原料測定手段の異常動作を判定する異常動作判定装置、その方法、および、生産プラントに関するものである。   The present invention relates to an abnormal operation determination device that determines an abnormal operation of a raw material measuring means, a method thereof, and a production plant.

従来、コンビナートにおける複数の工場間での製品原料を輸送する方法が知られている（例えば、特許文献１参照）。この特許文献１の方法では、外航船、内航船を介して貯留用タンクに流入させたＬＮＧを、トラックやタンクローリあるいはパイプラインで需要家である火力発電所などに輸送する構成が採られている。   Conventionally, a method of transporting product raw materials between a plurality of factories in a complex is known (see, for example, Patent Document 1). In the method of Patent Document 1, a configuration is adopted in which LNG that has flowed into a storage tank via an ocean-going vessel or a coastal vessel is transported to a thermal power plant that is a consumer by a truck, a tank truck, or a pipeline. .

特開２００２−３５６２３１号公報JP 2002-356231 A

ところで、特許文献１に記載のような構成において、原料を供給する工場の運転管理において最も基礎的な解析方法は物質収支を把握することであり、原料の流量などの基礎データは計装機器で測定される。通常、原料や運転の条件による組成変動は定期的なサンプル採取期間内に起こる可能性が高いことから、組成変動をリアルタイムで把握するためにインラインアナライザ（プロセスガスクロマトグラフィー）で組成を分析する。この注目成分の供給量を日々管理することは生産管理を実施する上で欠くことのできない重要な管理項目である。   By the way, in the configuration as described in Patent Document 1, the most basic analysis method in the operation management of the factory that supplies the raw material is to grasp the material balance, and the basic data such as the flow rate of the raw material is an instrumentation device. Measured. In general, composition fluctuations due to raw materials and operating conditions are likely to occur within a regular sampling period, so the composition is analyzed with an in-line analyzer (process gas chromatography) in order to grasp the composition fluctuations in real time. Daily management of the supply amount of the component of interest is an important management item indispensable for implementing production management.

インラインアナライザ計測精度維持管理のための標準ガスによる定期照合インターバルは、通常、半年から１年に１回程度である。この定期照合インターバル間の分析精度は、インラインアナライザによる初期分析開始後の半年間から１年間に初期流動管理として実施される分析精度確認テストで得られた精度と同一と見なして運用される。
また、標準ガスによる定期照合を補完するインラインアナライザ計測精度維持管理方法として、定期サンプルの品質管理部門ガスクロマトグラフィー分析結果との比較照合が行われている。この比較照合の頻度は、インラインアナライザが安定すれば通常１月に１回程度である。 The regular verification interval with the standard gas for maintaining and managing the measurement accuracy of the in-line analyzer is usually about once every six months to one year. The analysis accuracy between the periodic verification intervals is operated by assuming that it is the same as the accuracy obtained in the analysis accuracy confirmation test performed as the initial flow management from half a year to one year after the start of the initial analysis by the in-line analyzer.
In addition, as a method for maintaining and managing the measurement accuracy of an in-line analyzer that complements regular verification using standard gas, comparative verification is performed with the results of gas chromatography analysis of the quality control department of regular samples. The frequency of this comparison is usually about once a month if the inline analyzer is stable.

しかしながら、日々の運転では１月に１回程度の照合結果が明確になるまでインラインアナライザを正として行われることになり、分析値の変動が大きいインラインアナライザの故障は日常の物質収支計算などで検出可能であるが、偏差が徐々に変化するような故障の場合は、異常を検知することが困難である。   However, in day-to-day operation, the in-line analyzer is assumed to be positive until the verification result is clarified about once a month, and the failure of the in-line analyzer with large fluctuations in the analytical value is detected by daily material balance calculation etc. Although it is possible, it is difficult to detect an abnormality in the case of a failure in which the deviation gradually changes.

本発明の目的は、このような点に鑑みて、原料測定手段の異常動作を適切に判定可能な異常動作判定装置、その方法、および、生産プラントを提供することである。   In view of the above, an object of the present invention is to provide an abnormal operation determination device, a method thereof, and a production plant that can appropriately determine an abnormal operation of a raw material measuring unit.

本発明の異常動作判定装置は、原料が移送される移送経路における移送方向の上流側に設けられて前記原料を測定する第１の原料測定手段および下流側に設けられて前記原料を測定する第２の原料測定手段の異常動作を判定する異常動作判定装置であって、前記第１の原料測定手段および前記第２の原料測定手段での測定データを取得して、これらの測定データを等しくするための補正値を算出する補正値算出手段と、この補正値算出手段で算出した補正値を蓄積する補正値蓄積手段と、前記異常動作の判断基準値を取得して、この判断基準値よりも大きい前記補正値が所定回数以上連続してまたは小さい前記補正値が所定回数以上連続して前記補正値蓄積手段で蓄積されたことを認識すると、この補正値に対応する前記原料測定手段の動作が異常であると判定する異常動作判定手段と、を具備したことを特徴とする。
本発明の異常動作判定方法は、原料が移送される移送経路における移送方向の上流側に設けられて前記原料を測定する第１の原料測定手段および下流側に設けられて前記原料を測定する第２の原料測定手段の異常動作を判定する異常動作判定方法であって、前記第１の原料測定手段および前記第２の原料測定手段での測定データを取得して、これらの測定データを等しくするための補正値を算出する補正値算出工程と、この補正値算出工程で算出した補正値を蓄積する補正値蓄積工程と、前記異常動作の判断基準値を取得して、この判断基準値よりも大きい前記補正値が所定回数以上連続してまたは小さい前記補正値が所定回数以上連続して前記補正値蓄積工程で蓄積されたことを認識すると、この補正値に対応する前記原料測定手段の動作が異常であると判定する異常動作判定工程と、を実施することを特徴とする。 The abnormal operation determination device of the present invention is provided on the upstream side in the transfer direction in the transfer path through which the raw material is transferred, and is provided on the downstream side with the first raw material measuring means for measuring the raw material and for measuring the raw material. An abnormal operation determination device that determines abnormal operation of the second raw material measuring means, obtains measurement data in the first raw material measurement means and the second raw material measurement means, and equalizes these measurement data A correction value calculating means for calculating a correction value for correction, a correction value accumulating means for accumulating the correction value calculated by the correction value calculating means, and a determination reference value for the abnormal operation. When it is recognized that the large correction value is continuously stored by the correction value storage means for a predetermined number of times or a small correction value is stored for a predetermined number of times or more, the operation of the raw material measuring unit corresponding to the correction value And abnormal operation judging means for judging to be abnormal, characterized by comprising a.
The abnormal operation determination method of the present invention includes a first raw material measuring unit that is provided on the upstream side in the transfer direction in a transfer path in which a raw material is transferred and that measures the raw material, and a first raw material measuring unit that is provided on the downstream side and measures the raw material. An abnormal operation determination method for determining an abnormal operation of the second raw material measuring means, wherein measurement data obtained by the first raw material measurement means and the second raw material measurement means are acquired, and these measurement data are made equal. A correction value calculation step for calculating a correction value for correction, a correction value accumulation step for accumulating the correction value calculated in the correction value calculation step, and a determination reference value for the abnormal operation. When recognizing that the large correction value has been accumulated in the correction value accumulation step continuously for a predetermined number of times or smaller, or the small correction value has been accumulated in the correction value accumulation step, the operation of the raw material measuring unit corresponding to this correction value Which comprises carrying out the abnormality and the abnormal operation judgment step of judging that the, the.

ここで、原料測定手段で測定される原料としては、液体、気体、固体のいずれであってもよい。また、移送経路が複数の工場間を架け渡すように設置されかつ各工場に原料測定手段が設置されていてもよいし、移送経路および原料測定手段が１つの工場内に設置されていてもよい。異常動作の判断基準値は、作業者により設定された値であってもよいし、補正値蓄積手段で蓄積した補正値の平均値や中間値であってもよい。
この発明によれば、第１，第２の原料測定手段での測定データを等しくするような補正値を算出して、異常動作の判断基準値よりも例えば大きい補正値が所定回数以上連続して補正値蓄積手段に蓄積されたことを認識すると、この補正値に対応する原料測定手段の動作が異常であると判定している。
このため、判断基準値と、複数回の測定データに基づく補正値とを比較するので、原料測定手段に偏差が徐々に変化するような故障が生じていたとしても、この異常を検出することができる。すなわち、原料測定手段の異常動作を適切に判定できる。 Here, the raw material measured by the raw material measuring means may be any of liquid, gas, and solid. Further, the transfer path may be installed across a plurality of factories, and the raw material measuring means may be installed in each factory, or the transfer path and the raw material measuring means may be installed in one factory. . The abnormal operation determination reference value may be a value set by the operator, or may be an average value or an intermediate value of the correction values accumulated by the correction value accumulation means.
According to this invention, a correction value that makes the measurement data in the first and second raw material measuring means equal is calculated, and a correction value that is larger than the reference value for determining abnormal operation, for example, continues for a predetermined number of times. When recognizing that it has been stored in the correction value storage means, it is determined that the operation of the raw material measurement means corresponding to this correction value is abnormal.
For this reason, since the judgment reference value is compared with the correction value based on a plurality of times of measurement data, it is possible to detect this abnormality even if a failure in which the deviation gradually changes occurs in the raw material measurement means. it can. That is, the abnormal operation of the raw material measuring means can be determined appropriately.

本発明の異常動作判定装置では、前記移送経路は、１個の合流経路と、この合流経路の一端で合流する複数の分岐経路と、を備え、前記複数の分岐経路には、前記第１の原料測定手段がそれぞれ設けられており、前記合流経路には、前記第２の原料測定手段が設けられており、前記補正値算出手段は、複数の前記第１の原料測定手段での測定データの合計値と、前記第２の原料測定手段での測定データとを等しくするための前記補正値を算出する構成が好ましい。
この発明によれば、複数の工場から分岐経路を介して移送される原料を合流経路で混合して１個の工場に移送する構成において、各経路の原料測定手段の異常を検知できる。 In the abnormal operation determination device of the present invention, the transfer path includes one merging path and a plurality of branch paths that merge at one end of the merging path, and the plurality of branch paths include the first branch path. Raw material measuring means is provided, and the second raw material measuring means is provided in the merging path, and the correction value calculating means is configured to transmit measurement data obtained by a plurality of first raw material measuring means. It is preferable that the correction value for making the total value equal to the measurement data obtained by the second raw material measurement means is calculated.
According to the present invention, in the configuration in which the raw materials transferred from a plurality of factories via the branch path are mixed by the merging path and transferred to one factory, the abnormality of the raw material measuring means in each path can be detected.

本発明の異常動作判定装置では、前記第１の原料測定手段および前記第２の原料測定手段は、前記原料の移送量を測定する移送量測定手段および前記原料に含まれる成分の組成比を測定する原料組成比測定手段のうち少なくとも一方を備えている構成が好ましい。
この発明によれば、原料の供給量や原料に含まれる成分の組成比を管理するプラントあるいは工程において、移送量測定手段や原料組成比測定手段の異常を適切に判定できる。
特に、第１，第２の原料測定手段に移送量測定手段および組成比測定手段の両方を設ければ、これらの測定データに基づく原料中の特性成分のみの移送量を管理しつつ、原料測定手段の異常を適切に判定できる。 In the abnormal operation determination device of the present invention, the first raw material measuring means and the second raw material measuring means measure the composition ratio of the components contained in the raw material and the transfer amount measuring means for measuring the transport amount of the raw material. A configuration including at least one of the raw material composition ratio measuring means is preferable.
According to the present invention, in a plant or process for managing the supply amount of raw materials and the composition ratio of components contained in the raw materials, it is possible to appropriately determine an abnormality in the transfer amount measuring means and the raw material composition ratio measuring means.
In particular, if both the transfer amount measuring means and the composition ratio measuring means are provided in the first and second raw material measuring means, the raw material measurement is performed while managing the transfer amount of only the characteristic component in the raw material based on these measurement data. The abnormality of the means can be determined appropriately.

本発明の異常動作判定装置では、前記補正値算出手段は、前記第１の原料測定手段および前記第２の原料測定手段の測定精度を反映させた前記補正値を算出する構成が好ましい。
ここで、測定精度を反映させた補正値の算出方法としては、各原料測定手段の測定精度をそのまま補正値に対して加減乗除する方法や、各原料測定手段の測定精度の比率を一方の原料測定手段の補正値に対して加減乗除する方法が例示できる。
この発明によれば、原料測定手段の測定精度を反映させた補正値に基づき異常を判定するため、一対の原料測定手段の測定精度が異なる場合でもそれぞれの異常動作を適切に判定できる。 In the abnormal operation determination device of the present invention, it is preferable that the correction value calculation unit calculates the correction value reflecting the measurement accuracy of the first raw material measurement unit and the second raw material measurement unit.
Here, as a calculation method of the correction value reflecting the measurement accuracy, a method of adding / subtracting / dividing the measurement accuracy of each raw material measurement unit as it is with respect to the correction value, or a ratio of the measurement accuracy of each raw material measurement unit to one raw material A method of adding / subtracting / dividing / subtracting the correction value of the measuring means can be exemplified.
According to this invention, since abnormality is determined based on the correction value reflecting the measurement accuracy of the raw material measurement means, even when the measurement accuracy of the pair of raw material measurement means is different, each abnormal operation can be appropriately determined.

本発明の生産プラントは、ノルマルブテンを含有するノルマルブテン含有物を原料として供給するノルマルブテン供給工場と、エチレンを含有するエチレン含有物を原料として供給するエチレン供給工場と、前記ノルマルブテン含有物が移送される第１の移送経路を介して前記ノルマルブテン供給工場に接続されるとともに前記エチレン含有物が移送される第２の移送経路を介して前記エチレン供給工場に接続され、前記ノルマルブテンおよび前記エチレンを利用してプロピレンを生産するプロピレン生産工場と、上述の異常動作判定装置と、を具備し、前記ノルマルブテン供給工場および前記エチレン供給工場のうち少なくとも一方の工場には、前記第１の原料測定手段が設けられ、前記プロピレン生産工場には、前記第２の原料測定手段が設けられていることを特徴とする。
この発明によれば、上述の異常動作判定装置と同様の作用効果を奏することが可能なプロピレンの生産プラントを提供できる。 The production plant of the present invention includes a normal butene supply plant that supplies a normal butene-containing product containing normal butene as a raw material, an ethylene supply plant that supplies an ethylene-containing product containing ethylene as a raw material, and the normal butene-containing product includes The normal butene is connected to the normal butene supply factory via a first transfer path to be transferred, and is connected to the ethylene supply factory via a second transfer path to which the ethylene content is transferred, and the normal butene and the A propylene production factory for producing propylene using ethylene, and the above-described abnormal operation determination device, wherein at least one of the normal butene supply factory and the ethylene supply factory includes the first raw material. Measuring means is provided, and the propylene production plant includes the second raw material measuring means. And it is provided.
According to this invention, it is possible to provide a propylene production plant capable of producing the same effects as the above-described abnormal operation determination device.

本発明の生産プラントでは、前記第１の原料測定手段は、複数の前記ノルマルブテン供給工場にそれぞれ設けられて前記ノルマルブテン供給工場から供給するノルマルブテンの供給量を測定し、前記第２の原料測定手段は、前記プロピレン生産工場で受け入れるノルマルブテンの受入量を測定し、前記補正値算出手段で算出した前記補正値に基づいて、前記複数の第１の原料測定手段および前記第２の原料測定手段での測定データを補正して、前記原料測定手段の動作が正常な場合の前記ノルマルブテンの補正後供給量および補正後受入量を算出する補正移送量算出手段と、この補正移送量算出手段で算出した前記補正後供給量および前記補正後受入量に基づいて、前記複数のノルマルブテン供給工場に前記プロピレンを分配する分配制御手段と、を具備した構成が好ましい。
この発明によれば、原料測定手段の動作が正常な場合の補正後供給量と補正後受入量とに基づいて、複数のノルマルブテン供給工場にプロピレンを分配するので、プロピレン生産のためのノルマルブテン供給量に応じてプロピレンを適切に分配できる。 In the production plant of the present invention, the first raw material measuring means measures the amount of normal butene supplied from the normal butene supply factory and provided in each of the plurality of normal butene supply factories, and the second raw material The measurement means measures the amount of normal butene received at the propylene production plant, and based on the correction value calculated by the correction value calculation means, the plurality of first raw material measurement means and the second raw material measurement Correction transfer amount calculation means for correcting the measured data at the means and calculating the corrected supply amount and the corrected received amount of the normal butene when the operation of the raw material measurement means is normal, and the corrected transfer amount calculation means The distribution control unit distributes the propylene to the plurality of normal butene supply factories based on the corrected supply amount and the corrected reception amount calculated in When the configuration provided with the preferred.
According to this invention, since propylene is distributed to a plurality of normal butene supply factories based on the corrected supply amount and the corrected reception amount when the operation of the raw material measuring means is normal, normal butene for propylene production is provided. Propylene can be appropriately distributed according to the supply amount.

以下、図面を参照して、本発明の一実施形態を説明する。本実施形態では、プロピレン生産プラントを例示して説明する。すなわち、ノルマルブテンと、エチレンとを反応させてプロピレンを生産する構成を例示する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, a propylene production plant will be described as an example. That is, a configuration in which normal butene and ethylene are reacted to produce propylene is exemplified.

［プロピレン生産プラントの構成］
まず、プロピレン生産プラントの構成について説明する。
図１は、プロピレン生産プラントの概略構成を示すブロック図である。図２は、ラグランジュの未定乗数法を説明するためのモデルを示す図である。図３は、プロピレン生産プラントを図２のモデルで表した図である。図４は、流量計の測定精度を考慮に入れない場合のラグランジュの未定乗数法による補正量割合および補正流量の算出結果を示す図である。図５は、流量計の測定精度を考慮に入れた場合のラグランジュの未定乗数法による補正量割合および補正流量の算出結果を示す図である。図６は、故障検知に用いる管理図を示す図である。 [Configuration of propylene production plant]
First, the configuration of the propylene production plant will be described.
FIG. 1 is a block diagram showing a schematic configuration of a propylene production plant. FIG. 2 is a diagram illustrating a model for explaining the Lagrange's undetermined multiplier method. FIG. 3 is a diagram showing a propylene production plant by the model of FIG. FIG. 4 is a diagram illustrating a calculation result of the correction amount ratio and the corrected flow rate by the Lagrange's undetermined multiplier method when the measurement accuracy of the flow meter is not taken into consideration. FIG. 5 is a diagram showing a calculation result of the correction amount ratio and the correction flow rate by the Lagrange's undetermined multiplier method when the measurement accuracy of the flow meter is taken into consideration. FIG. 6 is a diagram showing a control chart used for failure detection.

〔生産関連の構成〕
まず、プロピレン生産プラントにおけるプロピレン生産関連の構成について説明する。
図１に示すように、プロピレン生産プラント１は、Ａ社、Ｂ社、Ｃ社にそれぞれ設けられている３個のノルマルブテン供給工場２と、Ｄ社に設けられているエチレン供給工場３と、Ｅ社に設けられているプロピレン生産工場４と、を備えている。また、ノルマルブテン供給工場２と、プロピレン生産工場４とは、パイプラインである第１の移送経路１１により各種材料を移送可能に接続されている。この第１の移送経路１１は、合流経路１１Ａと、この合流経路１１Ａの一端で合流する３個の分岐経路１１Ｂと、を備えている。合流経路１１Ａの他端は、プロピレン生産工場４に接続されている。分岐経路１１Ｂの端部は、それぞれノルマルブテン供給工場２に接続されている。さらに、エチレン供給工場３と、プロピレン生産工場４とは、第２の移送経路１２により各種材料を移送可能に接続されている。 [Production-related composition]
First, a configuration related to propylene production in a propylene production plant will be described.
As shown in FIG. 1, the propylene production plant 1 includes three normal butene supply factories 2 provided in each of A company, B company, and C company, an ethylene supply factory 3 provided in D company, And a propylene production factory 4 provided in Company E. The normal butene supply factory 2 and the propylene production factory 4 are connected to each other by a first transfer path 11 that is a pipeline so that various materials can be transferred. The first transfer path 11 includes a merging path 11A and three branch paths 11B that merge at one end of the merging path 11A. The other end of the junction path 11A is connected to the propylene production factory 4. The ends of the branch paths 11B are connected to the normal butene supply factory 2, respectively. Furthermore, the ethylene supply factory 3 and the propylene production factory 4 are connected by a second transfer path 12 so that various materials can be transferred.

ノルマルブテン供給工場２は、イソブテン除去部２１を備えている。イソブテン除去部２１は、イソブテンの重合除去、イソブテンと他の物質の反応除去のいずれの除去を実施するものであってもよい。このイソブテン除去部２１は、供給されるＣ４留分からイソブテンを重合除去や反応除去して、ノルマルブテンを含有するノルマルブテン含有物を生成する。そして、このノルマルブテン含有物をプロピレンの原料として、第１の移送経路１１を介してプロピレン生産工場４へ供給する。
ここで、ノルマルブテン含有物は、ノルマルブテンと、不純物と、を含有している。ノルマルブテンは、１−ブテン、ｔｒａｎｓ−２−ブテン、ｃｉｓ−２−ブテンからなる。また、不純物は、プロパン、プロピレン、プロパジエン、イソブタン、ノルマルブタン、イソブテン、ブタジエン、炭素数５以上の炭化水素成分などからなる。 The normal butene supply factory 2 includes an isobutene removal unit 21. The isobutene removal unit 21 may perform any of removal of polymerization of isobutene and reaction removal of isobutene and other substances. The isobutene removing unit 21 removes and removes isobutene from the supplied C4 fraction to produce a normal butene-containing material containing normal butene. And this normal butene containing material is supplied to the propylene production factory 4 via the 1st transfer path | route 11 as a raw material of propylene.
Here, the normal butene-containing material contains normal butene and impurities. Normal butene consists of 1-butene, trans-2-butene, and cis-2-butene. Impurities include propane, propylene, propadiene, isobutane, normal butane, isobutene, butadiene, hydrocarbon components having 5 or more carbon atoms, and the like.

エチレン供給工場３は、エチレンクラッカ３１を備えている。このエチレンクラッカ３１は、供給されるナフサからエチレンを含有するエチレン含有物を生成して、このエチレン含有物をプロピレンの原料として第２の移送経路１２を介してプロピレン生産工場４へ供給する。   The ethylene supply factory 3 includes an ethylene cracker 31. The ethylene cracker 31 generates an ethylene-containing material containing ethylene from the supplied naphtha, and supplies the ethylene-containing material to the propylene production plant 4 through the second transfer path 12 as a propylene raw material.

プロピレン生産工場４は、プロピレン転換装置４１と、プロピレン備蓄部４２と、を備えている。
プロピレン転換装置４１は、ノルマルブテン供給工場２からのノルマルブテン含有物と、エチレン供給工場３からのエチレンとを受け入れる。そして、ノルマルブテン含有物中のノルマルブテンと、エチレン含有物中のエチレンと、を反応させてプロピレンを製造する。
プロピレン備蓄部４２は、プロピレン転換装置４１で製造されたプロピレンを備蓄する。そして、必要に応じてプロピレンをＡ社〜Ｄ社に分配する。 The propylene production factory 4 includes a propylene conversion device 41 and a propylene storage unit 42.
The propylene conversion device 41 receives the normal butene-containing material from the normal butene supply factory 2 and the ethylene from the ethylene supply factory 3. Then, normal butene in the normal-butene-containing material is reacted with ethylene in the ethylene-containing material to produce propylene.
The propylene storage unit 42 stores the propylene manufactured by the propylene conversion device 41. And propylene is distributed to A company-D company as needed.

なお、以下において、分岐経路１１Ｂを移送されるノルマルブテン含有物、ノルマルブテンを、供給ノルマルブテン含有物、供給ノルマルブテンと適宜称す。また、合流経路１１Ａを移送されるノルマルブテン含有物、ノルマルブテンを、受入ノルマルブテン含有物、受入ノルマルブテンと適宜称す。つまり、３個のノルマルブテン供給工場２からの供給ノルマルブテン含有物の混合物、供給ノルマルブテンの混合物を、受入ノルマルブテン含有物、受入ノルマルブテンと適宜称す。   Hereinafter, the normal butene-containing material and normal butene transferred through the branch path 11B are appropriately referred to as a supplied normal butene-containing material and a supplied normal butene. Further, the normal butene-containing material and normal butene transferred through the merging path 11A are appropriately referred to as an accepted normal butene-containing material and an accepted normal butene. That is, the mixture of the normal n-butene-containing material and the mixture of the normal n-butene supplied from the three normal butene supply factories 2 are appropriately referred to as a normal n-butene-containing material and a normal n-butene.

〔データ処理関連の構成〕
次に、プロピレン生産プラントにおけるデータ処理関連の構成について説明する。
プロピレン生産プラント１には、第１の原料測定手段としての供給測定手段５１と、供給演算部５２と、第２の原料測定手段としての受入測定手段５３と、異常動作判定装置５４と、が設けられている。 [Data processing related configuration]
Next, a configuration related to data processing in a propylene production plant will be described.
The propylene production plant 1 includes a supply measurement unit 51 as a first raw material measurement unit, a supply calculation unit 52, an acceptance measurement unit 53 as a second raw material measurement unit, and an abnormal operation determination device 54. It has been.

供給測定手段５１は、Ａ社、Ｂ社、Ｃ社内の分岐経路１１Ｂに設けられており、各ノルマルブテン供給工場２から供給されるノルマルブテン含有物をそれぞれ測定する。そして、この供給測定手段５１は、移送量測定手段としての供給流量計５１１と、原料組成比測定手段としての供給インラインアナライザ５１２と、を備えている。
供給流量計５１１は、容積式積算流量計であり、供給ノルマルブテン含有物の流量を測定して、その結果を供給演算部５２へ出力する。供給インラインアナライザ５１２は、供給ノルマルブテン含有物の組成比を分析して、その結果を供給演算部５２へ出力する。 The supply measuring means 51 is provided in the branch path 11B in the A company, the B company, and the C company, and measures the normal butene-containing material supplied from each normal butene supply factory 2. The supply measuring unit 51 includes a supply flow meter 511 as a transfer amount measuring unit and a supply in-line analyzer 512 as a raw material composition ratio measuring unit.
The supply flow meter 511 is a positive displacement integrated flow meter, measures the flow rate of the supply normal butene-containing material, and outputs the result to the supply calculation unit 52. The supply in-line analyzer 512 analyzes the composition ratio of the supply normal butene-containing material and outputs the result to the supply calculation unit 52.

供給演算部５２は、Ａ社、Ｂ社、Ｃ社にそれぞれ設けられており、供給データ生成手段５２１と、データ送信手段５２２と、を備えている。
供給データ生成手段５２１は、供給流量計５１１での測定結果および供給インラインアナライザ５１２での分析結果を取得する。そして、流量測定結果に基づく供給ノルマルブテン含有物全体の供給量を示す供給量データと、組成比分析結果に基づく供給ノルマルブテン含有物中の供給ノルマルブテンの割合を示す供給割合データとを有する測定データとしての供給データを生成する。
データ送信手段５２２は、ネットワーク１３を介して異常動作判定装置５４に各種情報を送受信可能に接続されており、供給データをネットワーク１３を介して異常動作判定装置５４に送信する。 The supply operation unit 52 is provided in each of company A, company B, and company C, and includes supply data generation means 521 and data transmission means 522.
The supply data generation unit 521 acquires the measurement result of the supply flow meter 511 and the analysis result of the supply inline analyzer 512. And the measurement which has the supply amount data which shows the supply amount of the supply normal butene content whole based on a flow rate measurement result, and the supply ratio data which shows the ratio of the supply normal butene in the supply normal butene content based on a composition ratio analysis result Supply data as data is generated.
The data transmission means 522 is connected to the abnormal operation determination device 54 via the network 13 so as to be able to transmit and receive various information, and transmits supply data to the abnormal operation determination device 54 via the network 13.

受入測定手段５３は、Ｅ社内の合流経路１１Ａに設けられており、プロピレン生産工場４で受け入れる受入ノルマルブテン含有物を測定する。なお、受入測定手段５３を合流経路１１Ａと分岐経路１１Ｂとの合流地点に設けてもよい。そして、受入測定手段５３は、移送量測定手段としての受入流量計５３１と、原料組成比測定手段としての受入インラインアナライザ５３２と、を備えている。
受入流量計５３１は、供給流量計５１１よりも測定精度が低いオリフィス流量計であり、受入ノルマルブテン含有物の流量測定結果を異常動作判定装置５４に送信する。受入インラインアナライザ５３２は、受入ノルマルブテン含有物の組成比分析結果を異常動作判定装置５４に送信する。
なお、流量測定結果および組成比分析結果をネットワーク１３を介して異常動作判定装置５４に送信してもよい。 The receiving measurement means 53 is provided in the merge path 11A in the company E, and measures the receiving normal butene-containing material received at the propylene production factory 4. In addition, you may provide the receiving measurement means 53 in the junction point of 11 A of junction paths, and the branch path 11B. And the acceptance measurement means 53 is provided with the acceptance flowmeter 531 as a transfer amount measurement means, and the acceptance in-line analyzer 532 as a raw material composition ratio measurement means.
The receiving flow meter 531 is an orifice flow meter having measurement accuracy lower than that of the supply flow meter 511, and transmits the flow measurement result of the received normal butene-containing material to the abnormal operation determination device 54. The reception inline analyzer 532 transmits the composition ratio analysis result of the received normal butene-containing material to the abnormal operation determination device 54.
The flow rate measurement result and the composition ratio analysis result may be transmitted to the abnormal operation determination device 54 via the network 13.

異常動作判定装置５４は、例えばＥ社に設けられており、供給測定手段５１および受入測定手段５３での測定結果に基づいて、供給測定手段５１や受入測定手段５３の故障を検知する。この異常動作判定装置５４は、各種プログラムから構成され、受入データ生成手段５４１と、補正値算出手段および補正移送量算出手段としての物質収支補正手段５４２と、補正値蓄積手段としてのデータベース５４３と、異常動作判定手段としての故障検知手段５４４と、分配制御手段５４５と、を備えている。   The abnormal operation determination device 54 is provided, for example, at Company E, and detects a failure of the supply measurement unit 51 or the reception measurement unit 53 based on the measurement results of the supply measurement unit 51 and the reception measurement unit 53. The abnormal operation determination device 54 includes various programs, and includes an acceptance data generation unit 541, a material balance correction unit 542 as a correction value calculation unit and a corrected transfer amount calculation unit, a database 543 as a correction value storage unit, A failure detection unit 544 as an abnormal operation determination unit and a distribution control unit 545 are provided.

受入データ生成手段５４１は、受入測定手段５３から流量測定結果および組成比分析結果を取得する。そして、流量測定結果に基づく受入ノルマルブテン含有物全体の受入量を示す受入量データと、組成比分析結果に基づく受入ノルマルブテン含有物中のノルマルブテンの割合を示す受入割合データとを有する測定データとしての受入データを生成して、データベース５４３に記憶させる。   The reception data generation unit 541 acquires the flow rate measurement result and the composition ratio analysis result from the reception measurement unit 53. And the measurement data which has the acceptance amount data which shows the acceptance amount of the whole receiving normal butene content based on a flow measurement result, and the acceptance ratio data which shows the ratio of the normal butene in the acceptance normal butene content based on a composition ratio analysis result Is received and stored in the database 543.

物質収支補正手段５４２は、ラグランジュの未定乗数法を適用して、３個のノルマルブテン供給工場２からの供給データの合計値と、受入データとを等しくするための補正値としての補正量割合を算出する。   The material balance correction means 542 applies a Lagrange's undetermined multiplier method to calculate a correction amount ratio as a correction value for equalizing the total value of the supply data from the three normal butene supply factories 2 and the received data. calculate.

ここで、まず、ラグランジュの未定乗数法について説明する。
ラグランジュの未定乗数法での解くべき命題は、Ｎ個の流路を持つ系において、各々の流量Ｘが計測されているが、この流量Ｘには誤差が含まれておりバランスが取れていない場合、各流量計測値の各々の補正値の二乗和が最小となるように修正することである。
具体的には、図２に示すようなモデルにおいて、上述の命題より目的関数は以下の式（１）であり、制約条件は以下の式（２）である。 Here, the Lagrange's undetermined multiplier method will be described first.
The proposition to be solved by Lagrange's undetermined multiplier method is that each flow rate X is measured in a system with N channels, but this flow rate X contains an error and is not balanced. The correction is made so that the sum of squares of each correction value of each flow rate measurement value is minimized.
Specifically, in the model as shown in FIG. 2, the objective function is the following equation (1) and the constraint condition is the following equation (2) from the above proposition.

Figure 2009277019
Figure 2009277019

Figure 2009277019
Figure 2009277019

そして、式（１），（２）と以下の式（３）とから増加関数を作ると、以下の式（４）となる。   Then, when an increasing function is created from the equations (1) and (2) and the following equation (3), the following equation (4) is obtained.

Figure 2009277019
Figure 2009277019

Figure 2009277019
Figure 2009277019

ここで、式（４）のλｊはラグランジュ乗数である。そして、式（４）を各変数について偏微分し全てが０のとき、増加関数Ｈが最小となるので式（４）は、以下の式（５）および式（６）に置き換えることができる。 Here, λ j in equation (4) is a Lagrange multiplier. When the equation (4) is partially differentiated with respect to each variable and all are 0, the increase function H is minimized, so the equation (4) can be replaced with the following equations (5) and (6).

Figure 2009277019
Figure 2009277019

Figure 2009277019
Figure 2009277019

上記式（５）より以下の式（７）が得られ、式（７）を式（６）に代入すると、以下の式（８）が得られる。   The following formula (7) is obtained from the above formula (5), and the following formula (8) is obtained by substituting the formula (7) into the formula (6).

Figure 2009277019
Figure 2009277019

Figure 2009277019
Figure 2009277019

そして、式（８）と以下の式（９）とから以下の式（１０）が得られる。   Then, the following equation (10) is obtained from the equation (8) and the following equation (9).

Figure 2009277019
Figure 2009277019

Figure 2009277019
Figure 2009277019

上記式（１０）は、各ｊに対して成り立つのでバランスすべきノードの数だけ式が立てられる。また、λｉ、λｊもバランスすべきノードの数だけあるので式（１０）の連立方程式を解くことでλｉ、λｊを求めることができる。この求めたλｉ、λｊを式（７）に代入して、Ｃｉｊを求め、さらにＣｉｊを上記式（３）に代入することで真の流量（補正流量）Ｘｉｊを求めることができる。以上で、物質収支補正に関して最も確からしい値の推定ができたこととなる。 Since the above equation (10) is established for each j, the equation is established by the number of nodes to be balanced. Further, λ i, λ j since also the number of nodes to be balanced can be obtained λ i, λ j by solving the simultaneous equations of formula (10). Substituting the obtained λ i and λ j into the equation (7) to obtain C ij , and further substituting C ij into the equation (3), the true flow rate (corrected flow rate) X ij can be obtained. it can. With the above, the most probable value for the mass balance correction has been estimated.

次に、上述のラグランジュの未定乗数法を用いた補正量割合の算出例を説明する。
まず、供給インラインアナライザ５１２および受入インラインアナライザ５３２（以下、まとめて、インラインアナライザ５１２，５３２と適宜称す）が異常動作をしていないかを検知することを目的として、計測精度が高い供給流量計５１１および受入流量計５３１（以下、まとめて、流量計５１１，５３１と適宜称す）の測定結果を正とした。さらに、流量計５１１，５３１の測定結果（供給量データ、受入量データ）にインラインアナライザ５１２，５３２でのノルマルブテンの割合（供給割合データ、受入割合データ）を乗じて、供給ノルマルブテン、受入ノルマルブテンの測定量を算出し、この測定量を等しくするような補正をすることとした。
そして、図３に示すように、Ａ社、Ｂ社、Ｃ社から供給された供給ノルマルブテンの測定量Ｙｉｊが３１４．８トン／日、６１．１トン／日、６２．０トン／日であり、Ｅ社で受け入れる受入ノルマルブテンの測定量Ｙｉｊが４４５．０トン／日である場合において、つまりノルマルブテンの供給受入バランスとして７．１トン／日（１．６２％）あっていない場合において、供給流量計５１１と受入流量計５３１との測定精度が同じであると仮定して、ラグランジュの未定乗数法を適用すると図４に示すような補正量割合を求めることができる。 Next, an example of calculating the correction amount ratio using the Lagrange's undetermined multiplier method will be described.
First, for the purpose of detecting whether the supply in-line analyzer 512 and the receiving in-line analyzer 532 (hereinafter collectively referred to as in-line analyzers 512 and 532) are operating abnormally, the supply flow meter 511 with high measurement accuracy is used. The measurement results of the receiving flowmeter 531 (hereinafter collectively referred to as flowmeters 511 and 531 as appropriate) were positive. Further, the measurement results (supply amount data and received amount data) of the flow meters 511 and 531 are multiplied by the normal butene ratios (supply rate data and reception rate data) of the in-line analyzers 512 and 532, thereby supplying the normal normal butene and the received normal. The measured amount of butene was calculated, and correction was made to make this measured amount equal.
Then, as shown in FIG. 3, A company, B company, measured quantity Y ij supply normal butene supplied from Company C 314.8 t / day 61.1 ton / day 62.0 tons / day In the case where the measured amount Y ij of the received normal butene accepted by the company E is 445.0 tons / day, that is, there is not 7.1 tons / day (1.62%) as the normal butene supply / receive balance. In this case, assuming that the measurement accuracy of the supply flow meter 511 and the receiving flow meter 531 is the same, the correction amount ratio as shown in FIG. 4 can be obtained by applying the Lagrange's undetermined multiplier method.

ここで、上述したように、供給流量計５１１と受入流量計５３１との測定精度が異なっているため、この差異を考慮した補正量割合を算出することが好ましい。
供給流量計５１１（容積式積算流量計）の精度が０．５％、受入流量計５３１（オリフィス流量計）の精度が３％とした場合、受入流量計５３１は、供給流量計５１１に対して６倍精度が悪いため、この精度の悪さを補正係数算出に組み込むと図５に示すような補正量割合を求めることができる。
物質収支補正手段５４２は、上述したような処理で、流量計５１１，５３１の精度を考慮した図５に示すような供給測定手段５１および受入測定手段５３（以下、まとめて、測定手段５１，５３と適宜称す）での補正量割合を算出して、データベース５４３に蓄積する。
この補正量割合は、インラインアナライザ５１２，５３２が故障せずに稼働する場合、所定範囲内でばらつく。
さらに、物質収支補正手段５４２は、測定量Ｙｉｊと、補正量割合とに基づいて、ラグランジュの未定乗数法により補正された供給ノルマルブテンや受入ノルマルブテンの補正流量Ｘｉｊを算出する。 Here, as described above, since the measurement accuracy of the supply flow meter 511 and that of the reception flow meter 531 are different, it is preferable to calculate the correction amount ratio in consideration of this difference.
When the accuracy of the supply flow meter 511 (volumetric integrated flow meter) is 0.5% and the accuracy of the reception flow meter 531 (orifice flow meter) is 3%, the reception flow meter 531 is compared to the supply flow meter 511. Since the 6-times accuracy is poor, if this inaccuracy is incorporated in the correction coefficient calculation, a correction amount ratio as shown in FIG. 5 can be obtained.
The material balance correction means 542 is a process as described above, and the supply measurement means 51 and the reception measurement means 53 (hereinafter collectively referred to as the measurement means 51, 53) as shown in FIG. 5 considering the accuracy of the flow meters 511, 531. The correction amount ratio is calculated and stored in the database 543.
The correction amount ratio varies within a predetermined range when the in-line analyzers 512 and 532 operate without failure.
Furthermore, mass balance correcting unit 542 calculates a measured quantity Y ij, on the basis of the correction amount ratio, the correction flow rate X ij of the corrected fed normal butene and receiving normal butene by Lagrange multiplier method.

故障検知手段５４４は、物質収支補正手段５４２により蓄積された補正量割合に基づいて、図６に示すような管理図を作成する。具体的には、故障検知手段５４４は、例えばＡ社の供給測定手段５１での日別の補正量割合についての判断基準値としての平均値を算出して、この算出した平均値と、日別の補正量割合（日別算出値）とをプロットした管理図を作成する。そして、平均値よりも大きいまたは平均値よりも小さい日別算出値が所定回数以上連続した場合、この連続する現象が低い確率でしか起こらないものであると判定して、供給測定手段５１の供給インラインアナライザ５１２が故障したと検知する。例えば、図６に示すように、平均値よりも大きい日別算出値が７回連続した場合、この確率は、（０．５）７＝０．００７８、つまり１０００回に８回しか起こらない現象なので、供給測定手段５１が故障したと検知する。また、故障検知手段５４４は、Ｂ，Ｃ，Ｅ社の測定手段５１，５３についても管理図を作成して、インラインアナライザ５１２，５３２の故障を検知する。   The failure detection unit 544 creates a control chart as shown in FIG. 6 based on the correction amount ratio accumulated by the material balance correction unit 542. Specifically, the failure detection unit 544 calculates an average value as a determination reference value for the daily correction amount ratio in the supply measurement unit 51 of company A, for example, and calculates the calculated average value and the daily A control chart in which the correction amount ratio (daily calculated value) is plotted is created. Then, when daily calculated values that are larger than the average value or smaller than the average value continue for a predetermined number of times or more, it is determined that this continuous phenomenon occurs with a low probability, and the supply of the supply measuring means 51 It is detected that the inline analyzer 512 has failed. For example, as shown in FIG. 6, when the daily calculated value that is larger than the average value is repeated seven times, this probability is (0.5) 7 = 0.0078, that is, a phenomenon that occurs only 8 times per 1000 times. Therefore, it is detected that the supply measuring unit 51 has failed. The failure detection means 544 also creates a control chart for the measurement means 51 and 53 of companies B, C, and E, and detects a failure of the in-line analyzers 512 and 532.

分配制御手段５４５は、物質収支補正手段５４２で算出されたノルマルブテンの補正流量Ｘｉｊに基づいて、プロピレンを各ノルマルブテン供給工場２（Ａ社〜Ｃ社）に分配する。具体的には、分配制御手段５４５は、例えば図５に示すような補正流量Ｘｉｊが算出されている場合、Ａ社の分配割合を７１．９％（３１５．５１９／４３８．９００）と算出する。同様にして、Ｂ社、Ｃ社の分配割合を１４．０％、１４．２％と算出する。そして、分配制御手段５４５は、プロピレン備蓄部４２を制御して、Ａ社〜Ｃ社への分配対象のプロピレンを分配割合に応じてＡ社〜Ｃ社に分配するとともに、エチレン供給工場３（Ｄ社）への分配対象のプロピレンをＤ社へ分配する。 The distribution control unit 545 distributes propylene to the normal butene supply factories 2 (Company A to Company C) based on the normal butene corrected flow rate X ij calculated by the material balance correction unit 542. Specifically, the distribution control means 545 calculates the distribution ratio of company A as 71.9% (315.5519 / 438.900) when the corrected flow rate X ij as shown in FIG. 5 is calculated, for example. To do. Similarly, the distribution ratios of Company B and Company C are calculated as 14.0% and 14.2%. And the distribution control means 545 controls the propylene reserve part 42, distributes the propylene to be distributed to the A company to the C company to the A company to the C company according to the distribution ratio, and the ethylene supply factory 3 (D Distribute propylene to be distributed to Company D.

［プロピレン生産プラントの動作］
次に、プロピレン生産プラント１の動作について説明する。
図７は、プロピレン生産プラントの動作を示すフローチャートである。 [Operation of propylene production plant]
Next, the operation of the propylene production plant 1 will be described.
FIG. 7 is a flowchart showing the operation of the propylene production plant.

まず、Ａ社のノルマルブテン供給工場２は、図７に示すように、イソブテン除去部２１でイソブテンを重合除去して（ステップＳ１）、ノルマルブテン含有物をＥ社のプロピレン生産工場４に供給する（ステップＳ２）。また、Ａ社の供給演算部５２は、供給測定手段５１での測定結果に基づいて、ノルマルブテン含有物の全体供給量と、ノルマルブテンの割合とを算出する（ステップＳ３）。そして、供給データを生成して（ステップＳ４）、Ｅ社の異常動作判定装置５４へ送信する（ステップＳ５）。また、Ｂ社およびＣ社のノルマルブテン供給工場２も、上述のステップＳ１〜Ｓ５の処理を実施する。   First, as shown in FIG. 7, the normal butene supply factory 2 of company A polymerizes and removes isobutene in the isobutene removal unit 21 (step S <b> 1), and supplies the normal butene-containing material to the propylene production factory 4 of company E. (Step S2). Moreover, the supply calculating part 52 of A company calculates the total supply amount of a normal butene content and the ratio of normal butene based on the measurement result in the supply measurement means 51 (step S3). Then, supply data is generated (step S4) and transmitted to the abnormal operation determination device 54 of company E (step S5). Moreover, the normal butene supply factory 2 of B company and C company also performs the process of above-mentioned step S1-S5.

一方、Ｅ社のプロピレン生産工場４は、ステップＳ２においてノルマルブテン供給工場２から供給されるノルマルブテン含有物を受け入れて（ステップＳ６）、プロピレンを生産する（ステップＳ７）。この後、Ｅ社の異常動作判定装置５４は、受入測定手段５３での測定結果に基づいて、ノルマルブテン含有物の受入量と、ノルマルブテンの割合とを算出する（ステップＳ８）。さらに、異常動作判定装置５４は、ステップＳ５においてノルマルブテン供給工場２から送信される供給データを受信して（ステップＳ９）、ノルマルブテンの供給量と受入量との物質収支を補正する（ステップＳ１０）。このステップＳ１０では、ラグランジュの未定乗数法に基づく補正量割合と、供給ノルマルブテンや受入ノルマルブテンの補正流量Ｘｉｊと、を算出する。 On the other hand, the propylene production factory 4 of company E receives the normal butene-containing material supplied from the normal butene supply factory 2 in step S2 (step S6), and produces propylene (step S7). Thereafter, the abnormal operation determination device 54 of Company E calculates the amount of normal butene-containing material received and the ratio of normal butene based on the measurement result of the reception measurement means 53 (step S8). Further, the abnormal operation determination device 54 receives the supply data transmitted from the normal butene supply factory 2 in step S5 (step S9), and corrects the material balance between the supply amount and the reception amount of normal butene (step S10). ). In step S10, it calculates a correction amount ratio based on the Lagrange multiplier method, the correction flow rate X ij supply normal butene and receiving normal butene, a.

この後、異常動作判定装置５４は、補正量割合をデータベース５４３に蓄積し（ステップＳ１１）、管理図に基づいてインラインアナライザ５１２，５３２の故障の検知処理を実施して（ステップＳ１２）、故障があったか否かを判断する（ステップＳ１３）。そして、ステップＳ１３において、故障がないと判断した場合、補正流量Ｘｉｊに基づいて、プロピレンを分配して（ステップＳ１４）、処理を終了する。一方、ステップＳ１３において、故障があったと判断した場合、その旨を例えば音声、表示、点灯手段の点灯などにより報知して（ステップＳ１５）、ステップＳ１４の処理を実施する。 Thereafter, the abnormal operation determination device 54 accumulates the correction amount ratio in the database 543 (step S11), performs a failure detection process of the in-line analyzers 512 and 532 based on the control chart (step S12), and the failure is detected. It is determined whether there has been (step S13). If it is determined in step S13 that there is no failure, propylene is distributed based on the corrected flow rate Xij (step S14), and the process ends. On the other hand, if it is determined in step S13 that there is a failure, the fact is notified by voice, display, lighting means, etc. (step S15), and the process of step S14 is performed.

［プロピレン生産プラントの作用効果］
上述したように、上記実施形態では、以下のような作用効果を奏することができる。 [Effects of propylene production plant]
As described above, in the above embodiment, the following operational effects can be achieved.

（１）プロピレン生産プラント１の異常動作判定装置５４は、供給測定手段５１および受入測定手段５３での測定結果を等しくするための補正量割合を算出して、補正量割合の平均値よりも大きいまたは平均値よりも小さい日別算出値が所定回数以上連続した場合、この日別算出値に対応する測定手段５１，５３のインラインアナライザ５１２，５３２が故障したと検知する。
このため、平均値と、複数回の測定結果に基づく補正量割合とを比較するので、インラインアナライザ５１２，５３２に偏差が徐々に変化するような故障が生じていたとしても、この異常を検出することができる。したがって、インラインアナライザ５１２，５３２の異常動作を適切に判定できる。 (1) The abnormal operation determination device 54 of the propylene production plant 1 calculates a correction amount ratio for equalizing the measurement results in the supply measurement means 51 and the reception measurement means 53, and is larger than the average value of the correction amount ratios. Alternatively, when the daily calculated values smaller than the average value continue for a predetermined number of times or more, it is detected that the in-line analyzers 512 and 532 of the measuring means 51 and 53 corresponding to the daily calculated values have failed.
For this reason, since the average value is compared with the correction amount ratio based on a plurality of measurement results, even if a failure in which the deviation gradually changes occurs in the in-line analyzers 512 and 532, this abnormality is detected. be able to. Therefore, the abnormal operation of the inline analyzers 512 and 532 can be appropriately determined.

（２）異常動作判定装置５４は、３個の分岐経路１１Ｂを介して移送される供給ノルマルブテン含有物を測定する供給測定手段５１と、３個の分岐経路１１Ｂに連結された合流経路１１Ａを介して移送される受入ノルマルブテン含有物を測定する受入測定手段５３との故障を検知する。
このため、３個のノルマルブテン供給工場２から分岐経路１１Ｂを介して移送される供給ノルマルブテン含有物を合流経路１１Ａで混合してプロピレン生産工場４に移送する構成において、各ノルマルブテン供給工場２の供給インラインアナライザ５１２の異常を検知できる。 (2) The abnormal operation determination device 54 includes the supply measuring unit 51 that measures the supply normal butene-containing material transferred through the three branch paths 11B, and the merging path 11A connected to the three branch paths 11B. A failure with the receiving measurement means 53 for measuring the receiving normal butene-containing material transferred through the sensor is detected.
Therefore, in the configuration in which the normal n-butene-containing materials transferred from the three normal butene supply factories 2 via the branch path 11B are mixed in the merging path 11A and transferred to the propylene production factory 4, each normal butene supply factory 2 The abnormality of the supply in-line analyzer 512 can be detected.

（３）測定手段５１，５３に流量計５１１，５３１とインラインアナライザ５１２，５３２とを設け、異常動作判定装置５４でインラインアナライザ５１２，５３２の故障を検知している。
このため、ノルマルブテンの供給量を管理しつつ、インラインアナライザ５１２，５３２の異常を適切に判定できる。 (3) The measuring means 51 and 53 are provided with flow meters 511 and 531 and in-line analyzers 512 and 532, and the abnormal operation determination device 54 detects a failure of the in-line analyzers 512 and 532.
For this reason, it is possible to appropriately determine the abnormality of the in-line analyzers 512 and 532 while managing the supply amount of normal butene.

（４）異常動作判定装置５４は、流量計５１１，５３１の測定精度を反映させた補正量割合に基づいて故障を検知する。
このため、流量計５１１，５３１の測定精度が異なる場合でもインラインアナライザ５１２，５３２の異常を適切に判定できる。 (4) The abnormal operation determination device 54 detects a failure based on the correction amount ratio reflecting the measurement accuracy of the flow meters 511 and 531.
For this reason, even when the measurement accuracy of the flow meters 511 and 531 is different, the abnormality of the in-line analyzers 512 and 532 can be appropriately determined.

（５）異常動作判定装置５４は、補正量割合に基づき算出した補正流量Ｘｉｊに基づいて、３個のノルマルブテン供給工場２にプロピレンを分配している。
このため、プロピレン生産のためのノルマルブテン供給量に応じて、プロピレンを適切に分配できる。 (5) The abnormal operation determination device 54 distributes propylene to the three normal butene supply factories 2 based on the corrected flow rate X ij calculated based on the correction amount ratio.
For this reason, according to the normal butene supply amount for propylene production, propylene can be distributed appropriately.

［実施形態の変形例］
なお、以上に説明した態様は、本発明の一態様を示したものであって、本発明は、前記した実施形態に限定されるものではなく、本発明の目的及び効果を達成できる範囲内での変形や改良が、本発明の内容に含まれるものであることはいうまでもない。 [Modification of Embodiment]
The aspect described above shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment, and within the scope of achieving the objects and effects of the present invention. Needless to say, the modifications and improvements are included in the contents of the present invention.

すなわち、異常動作判定装置５４により、流量計５１１，５３１の故障を検知する構成としてもよいし、流量計５１１，５３１とインラインアナライザ５１２，５３２との両方の故障を検知する構成としてもよい。
さらには、温度や粘度などの原料の各種物性値を測定する原料測定手段の故障を検知する構成としてもよい。
また、エチレン供給工場３に供給測定手段５１を設けて、エチレンの供給量および受入量に基づいて測定手段５１，５３の故障を検知してもよい。このような構成において、補正量割合に基づいてエチレン供給工場３にプロピレンを分配すれば、プロピレン生産のためのエチレン供給量に応じてプロピレンを適切に分配できる。
そして、流量計５１１，５３１の測定精度を考慮に入れずに、図４に示すような補正量割合に基づいて測定手段５１，５３の故障を検知してもよい。
また、本発明の異常動作判定装置を、原料から生産物を生産する生産プラントに設けられた原料測定手段の故障を検知する構成に適用してもよい。
そして、上述した各機能をプログラムとして構築したが、例えば回路基板などのハードウェアあるいは１つのＩＣ（Integrated Circuit）などの素子にて構成するなどしてもよく、いずれの形態としても利用できる。なお、プログラムや別途記録媒体から読み取らせる構成とすることにより、上述したように取扱が容易で、利用の拡大が容易に図れる。 That is, it is good also as a structure which detects the failure of the flowmeters 511 and 531 by the abnormal operation determination apparatus 54, and it is good also as a structure which detects the failure of both the flowmeters 511 and 531 and the in-line analyzers 512 and 532.
Furthermore, it is good also as a structure which detects the failure of the raw material measurement means which measures various physical-property values, such as temperature and a viscosity.
Further, a supply measuring unit 51 may be provided in the ethylene supply factory 3, and a failure of the measuring units 51 and 53 may be detected based on the amount of ethylene supplied and the amount received. In such a configuration, if propylene is distributed to the ethylene supply factory 3 based on the correction amount ratio, propylene can be appropriately distributed according to the ethylene supply amount for propylene production.
Then, the failure of the measuring means 51 and 53 may be detected based on the correction amount ratio as shown in FIG. 4 without taking the measurement accuracy of the flow meters 511 and 531 into consideration.
Moreover, you may apply the abnormal operation determination apparatus of this invention to the structure which detects the failure of the raw material measurement means provided in the production plant which produces a product from a raw material.
Each function described above is constructed as a program, but may be configured by hardware such as a circuit board or an element such as a single integrated circuit (IC), and can be used in any form. Note that, by using a configuration that allows reading from a program or a separate recording medium, as described above, handling is easy, and usage can be easily expanded.

その他、本発明の実施における具体的な構造及び形状などは、本発明の目的を達成できる範囲で他の構造等としてもよい。   In addition, the specific structure, shape, and the like in the implementation of the present invention may be other structures as long as the object of the present invention can be achieved.

本発明は、原料測定手段の異常動作を判定する異常動作判定装置、その方法、および、生産プラントに利用できる。   INDUSTRIAL APPLICABILITY The present invention can be used for an abnormal operation determination device that determines an abnormal operation of a raw material measuring means, a method thereof, and a production plant.

本発明の一実施形態に係るプロピレン生産プラントの概略構成を示すブロック図である。It is a block diagram showing a schematic structure of a propylene production plant concerning one embodiment of the present invention. 前記一実施形態におけるラグランジュの未定乗数法を説明するためのモデルを示す図である。It is a figure which shows the model for demonstrating the Lagrange's undetermined multiplier method in the said one Embodiment. 前記一実施形態におけるプロピレン生産プラントを図２のモデルで表した図である。It is the figure which represented the propylene production plant in the said embodiment with the model of FIG. 前記一実施形態における流量計の測定精度を考慮に入れない場合のラグランジュの未定乗数法による補正量割合および補正流量の算出結果を示す図である。It is a figure which shows the calculation result of the corrected amount ratio by the Lagrange's undetermined multiplier method, and the corrected flow rate when the measurement accuracy of the flowmeter in the one embodiment is not taken into consideration. 前記一実施形態における流量計の測定精度を考慮に入れた場合のラグランジュの未定乗数法による補正量割合および補正流量の算出結果を示す図である。It is a figure which shows the calculation result of the correction amount ratio and correction | amendment flow volume by the Lagrange's undetermined multiplier method when the measurement precision of the flowmeter in the said one embodiment is taken into consideration. 前記一実施形態における故障検知に用いる管理図を示す図である。It is a figure which shows the control chart used for the failure detection in the said one Embodiment. 前記一実施形態におけるプロピレン生産プラントの動作を示すフローチャートである。It is a flowchart which shows operation | movement of the propylene production plant in the said one Embodiment.

符号の説明Explanation of symbols

１…プロピレン生産プラント
２…ノルマルブテン供給工場
３…エチレン供給工場
４…プロピレン生産工場
１１…第１の移送経路
１１Ａ…合流経路
１１Ｂ…分岐経路
１２…第２の移送経路
５１…第１の原料測定手段としての供給測定手段
５３…第２の原料測定手段としての受入測定手段
５４…異常動作判定装置
５１１…移送量測定手段としての供給流量計
５１２…原料組成比測定手段としての供給インラインアナライザ
５３１…移送量測定手段としての受入流量計
５３２…原料組成比測定手段としての受入インラインアナライザ
５４２…補正値算出手段および補正移送量算出手段としての物質収支補正手段
５４３…補正値蓄積手段としてのデータベース
５４４…異常動作判定手段としての故障検知手段
５４５…分配制御手段 DESCRIPTION OF SYMBOLS 1 ... Propylene production plant 2 ... Normal butene supply factory 3 ... Ethylene supply factory 4 ... Propylene production factory 11 ... 1st transfer path 11A ... Merge path 11B ... Branch path 12 ... 2nd transfer path 51 ... 1st raw material measurement Supply measurement means 53 as means 54. Acceptance measurement means as second raw material measurement means 54 ... Abnormal operation determination device 511 ... Supply flow meter as transfer amount measurement means 512 ... Supply in-line analyzer 531 as raw material composition ratio measurement means Accepted flow meter as transfer amount measuring means 532 ... Accepted in-line analyzer as raw material composition ratio measuring means 542 ... Correction value calculating means and mass balance correcting means as corrected transfer amount calculating means 543 ... Database as correction value accumulating means 544 ... Failure detection means as abnormal operation determination means 545 ... distribution control means

Claims (7)

原料が移送される移送経路における移送方向の上流側に設けられて前記原料を測定する第１の原料測定手段および下流側に設けられて前記原料を測定する第２の原料測定手段の異常動作を判定する異常動作判定装置であって、
前記第１の原料測定手段および前記第２の原料測定手段での測定データを取得して、これらの測定データを等しくするための補正値を算出する補正値算出手段と、
この補正値算出手段で算出した補正値を蓄積する補正値蓄積手段と、
前記異常動作の判断基準値を取得して、この判断基準値よりも大きい前記補正値が所定回数以上連続してまたは小さい前記補正値が所定回数以上連続して前記補正値蓄積手段で蓄積されたことを認識すると、この補正値に対応する前記原料測定手段の動作が異常であると判定する異常動作判定手段と、
を具備したことを特徴とする異常動作判定装置。 Abnormal operation of the first raw material measuring means provided on the upstream side in the transfer direction in the transfer path for transferring the raw material and the second raw material measuring means provided on the downstream side for measuring the raw material. An abnormal operation determination device for determining,
Correction value calculation means for acquiring measurement data in the first raw material measurement means and the second raw material measurement means and calculating a correction value for equalizing these measurement data;
Correction value accumulation means for accumulating correction values calculated by the correction value calculation means;
The determination reference value of the abnormal operation is acquired, and the correction value larger than the determination reference value is stored in the correction value storage means continuously for a predetermined number of times or smaller than a predetermined number of times. When recognizing that, the abnormal operation determining means for determining that the operation of the raw material measuring means corresponding to the correction value is abnormal,
An abnormal operation determination device comprising: 請求項１に記載の異常動作判定装置において、
前記移送経路は、１個の合流経路と、この合流経路の一端で合流する複数の分岐経路と、を備え、
前記複数の分岐経路には、前記第１の原料測定手段がそれぞれ設けられており、
前記合流経路には、前記第２の原料測定手段が設けられており、
前記補正値算出手段は、複数の前記第１の原料測定手段での測定データの合計値と、前記第２の原料測定手段での測定データとを等しくするための前記補正値を算出する
ことを特徴とする異常動作判定装置。 In the abnormal operation determination device according to claim 1,
The transfer path includes one merging path and a plurality of branch paths that merge at one end of the merging path,
Each of the plurality of branch paths is provided with the first raw material measuring means,
The merging path is provided with the second raw material measuring means,
The correction value calculation means calculates the correction value for making the total value of the measurement data obtained by the plurality of first raw material measurement means equal to the measurement data obtained by the second raw material measurement means. An abnormal operation determination device as a feature. 請求項１または請求項２に記載の異常動作判定装置において、
前記第１の原料測定手段および前記第２の原料測定手段は、前記原料の移送量を測定する移送量測定手段および前記原料に含まれる成分の組成比を測定する原料組成比測定手段のうち少なくとも一方を備えている
ことを特徴とする異常動作判定装置。 In the abnormal operation determination device according to claim 1 or 2,
The first raw material measuring means and the second raw material measuring means are at least one of a transfer amount measuring means for measuring the transfer amount of the raw material and a raw material composition ratio measuring means for measuring a composition ratio of components contained in the raw material. An abnormal operation determination device characterized by comprising one of them. 請求項１から請求項３のいずれか一項に記載の異常動作判定装置において、
前記補正値算出手段は、前記第１の原料測定手段および前記第２の原料測定手段の測定精度を反映させた前記補正値を算出する
ことを特徴とする異常動作判定装置。 In the abnormal operation determination device according to any one of claims 1 to 3,
The abnormal operation determination device, wherein the correction value calculation means calculates the correction value reflecting the measurement accuracy of the first raw material measurement means and the second raw material measurement means. ノルマルブテンを含有するノルマルブテン含有物を原料として供給するノルマルブテン供給工場と、
エチレンを含有するエチレン含有物を原料として供給するエチレン供給工場と、
前記ノルマルブテン含有物が移送される第１の移送経路を介して前記ノルマルブテン供給工場に接続されるとともに前記エチレン含有物が移送される第２の移送経路を介して前記エチレン供給工場に接続され、前記ノルマルブテンおよび前記エチレンを利用してプロピレンを生産するプロピレン生産工場と、
請求項１から請求項４のいずれか一項に記載の異常動作判定装置と、を具備し、
前記ノルマルブテン供給工場および前記エチレン供給工場のうち少なくとも一方の工場には、前記第１の原料測定手段が設けられ、
前記プロピレン生産工場には、前記第２の原料測定手段が設けられている
ことを特徴とする生産プラント。 A normal butene supply plant that supplies normal butene-containing materials containing normal butene as raw materials;
An ethylene supply plant that supplies ethylene-containing materials containing ethylene as a raw material;
The normal butene-containing material is connected to the normal butene supply plant via a first transfer path through which the normal butene-containing material is transferred, and is connected to the ethylene supply plant via a second transfer route through which the ethylene-containing material is transferred. A propylene production plant for producing propylene using the normal butene and the ethylene,
An abnormal operation determination device according to any one of claims 1 to 4, and
At least one of the normal butene supply factory and the ethylene supply factory is provided with the first raw material measurement means,
The propylene production factory is provided with the second raw material measuring means. 請求項５に記載の生産プラントにおいて、
前記第１の原料測定手段は、複数の前記ノルマルブテン供給工場にそれぞれ設けられて前記ノルマルブテン供給工場から供給するノルマルブテンの供給量を測定し、
前記第２の原料測定手段は、前記プロピレン生産工場で受け入れるノルマルブテンの受入量を測定し、
前記補正値算出手段で算出した前記補正値に基づいて、前記複数の第１の原料測定手段および前記第２の原料測定手段での測定データを補正して、前記原料測定手段の動作が正常な場合の前記ノルマルブテンの補正後供給量および補正後受入量を算出する補正移送量算出手段と、
この補正移送量算出手段で算出した前記補正後供給量および前記補正後受入量に基づいて、前記複数のノルマルブテン供給工場に前記プロピレンを分配する分配制御手段と、
を具備したことを特徴とする生産プラント。 In the production plant according to claim 5,
The first raw material measuring means is provided in each of the plurality of normal butene supply factories and measures the amount of normal butene supplied from the normal butene supply factories,
The second raw material measuring means measures the amount of normal butene received at the propylene production plant,
Based on the correction value calculated by the correction value calculation means, the measurement data in the plurality of first raw material measurement means and the second raw material measurement means are corrected, and the operation of the raw material measurement means is normal. A corrected transfer amount calculating means for calculating the corrected supply amount and the corrected received amount of the normal butene in the case,
Distribution control means for distributing the propylene to the plurality of normal butene supply factories based on the corrected supply amount calculated by the corrected transfer amount calculation means and the corrected received amount;
A production plant comprising: 原料が移送される移送経路における移送方向の上流側に設けられて前記原料を測定する第１の原料測定手段および下流側に設けられて前記原料を測定する第２の原料測定手段の異常動作を判定する異常動作判定方法であって、
前記第１の原料測定手段および前記第２の原料測定手段での測定データを取得して、これらの測定データを等しくするための補正値を算出する補正値算出工程と、
この補正値算出工程で算出した補正値を蓄積する補正値蓄積工程と、
前記異常動作の判断基準値を取得して、この判断基準値よりも大きい前記補正値が所定回数以上連続してまたは小さい前記補正値が所定回数以上連続して前記補正値蓄積工程で蓄積されたことを認識すると、この補正値に対応する前記原料測定手段の動作が異常であると判定する異常動作判定工程と、を実施する
ことを特徴とする異常動作判定方法。 Abnormal operation of the first raw material measuring means provided on the upstream side in the transfer direction in the transfer path for transferring the raw material and the second raw material measuring means provided on the downstream side for measuring the raw material. An abnormal operation determination method for determining,
A correction value calculation step of obtaining measurement data in the first raw material measurement means and the second raw material measurement means, and calculating a correction value for equalizing these measurement data;
A correction value accumulating step for accumulating the correction value calculated in the correction value calculating step;
The determination reference value of the abnormal operation is acquired, and the correction value larger than the determination reference value is stored in the correction value storage step continuously for a predetermined number of times or smaller than the predetermined number of times. And an abnormal operation determination step of determining that the operation of the raw material measuring unit corresponding to the correction value is abnormal.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07103960B2 (en) * 1991-04-06 1995-11-08 石油資源開発株式会社 Pipeline leak detection method
JP2002091552A (en) * 2000-09-20 2002-03-29 Yokogawa Electric Corp System for monitoring product quality in plant operation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07103960B2 (en) * 1991-04-06 1995-11-08 石油資源開発株式会社 Pipeline leak detection method
JP2002091552A (en) * 2000-09-20 2002-03-29 Yokogawa Electric Corp System for monitoring product quality in plant operation

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