JP2021188949A - Method and device for determining life of physical adsorption type filter - Google Patents

Method and device for determining life of physical adsorption type filter Download PDF

Info

Publication number
JP2021188949A
JP2021188949A JP2020092038A JP2020092038A JP2021188949A JP 2021188949 A JP2021188949 A JP 2021188949A JP 2020092038 A JP2020092038 A JP 2020092038A JP 2020092038 A JP2020092038 A JP 2020092038A JP 2021188949 A JP2021188949 A JP 2021188949A
Authority
JP
Japan
Prior art keywords
physical adsorption
adsorption type
type filter
life
collection efficiency
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
Application number
JP2020092038A
Other languages
Japanese (ja)
Other versions
JP7440344B2 (en
Inventor
陽介 小森
Yosuke Komori
知宙 梅田
Tomohiro Umeda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinwa Corp
Original Assignee
Shinwa Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shinwa Corp filed Critical Shinwa Corp
Priority to JP2020092038A priority Critical patent/JP7440344B2/en
Publication of JP2021188949A publication Critical patent/JP2021188949A/en
Application granted granted Critical
Publication of JP7440344B2 publication Critical patent/JP7440344B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

To provide a method for determining the life of a physical adsorption type filter, which is easy in operation, implementable in a short time and highly accurate.SOLUTION: A method for determining the life of a physical adsorption type filter includes a collection efficiency calculation step of calculating the collection efficiency by collecting gas passing through a physical adsorption type filter while supplying reference gas to the physical adsorption type filter, and measuring a concentration of a specific substance in the collected gas, and comparing the concentration with a concentration of the substance in the reference gas. A collection efficiency measurement step is carried out multiple times with respect to an unused physical adsorption type filter, in order to prepare a breakthrough curve which indicates a relationship between the collection efficiency calculated multiple times, and a cumulative supply time of the reference gas to the physical adsorption type filter. After preparing the breakthrough curve, the collection efficiency measurement step is applied to a physical adsorption type filter that is subjected to life determination, and then, the calculated collection efficiency and the breakthrough curve are compared in order to determine the life of the physical adsorption type filter.SELECTED DRAWING: Figure 3

Description

本発明は物理吸着型フィルターの寿命判定方法および寿命判定装置に関する。 The present invention relates to a life determination method and a life determination device for a physical adsorption type filter.

従来、レストランを含む飲食店または給食センター等の厨房や、パン、にんにく加工品、魚肉加工品等の食品を製造または加工する工場等からの排気中の調理臭を低減するために、物理吸着型フィルターが用いられている。物理吸着型フィルターの一例は、特許文献1に記載されているような脱臭用ハニカムフィルターである。脱臭用ハニカムフィルターは、空気の流れ方向に沿って延びる多数の細孔を有し、空気中の臭気物質(例えばアセトアルデヒド、トリメチルアミン、酢酸、アミン類、アンモニアなどの化合物)を物理的に吸着し、臭気物質が除去された空気を通過させる。さらに、脱臭用ハニカムフィルターは、吸着した臭気物質を触媒によって分解して臭気の拡散を抑制する。脱臭用ハニカムフィルターは、臭気物質を吸着すると徐々に脱臭能力が低下する。脱臭能力が低下した脱臭用ハニカムフィルターを使用し続けると、悪臭を除去できずに下流側に拡散させてしまい、悪臭防止法の規制基準を維持できなくなるおそれがある。従って、脱臭能力が低下した脱臭用ハニカムフィルターは交換する必要がある。 Conventionally, in order to reduce the cooking odor in the exhaust from kitchens such as restaurants or feeding centers including restaurants, and factories that manufacture or process foods such as bread, processed garlic products, and processed fish meat products, physical adsorption type A filter is used. An example of a physical adsorption type filter is a deodorizing honeycomb filter as described in Patent Document 1. The deodorizing honeycomb filter has a large number of pores extending along the direction of air flow, and physically adsorbs odorous substances in the air (for example, compounds such as acetaldehyde, trimethylamine, acetic acid, amines, and ammonia). Pass the air from which the odorous substances have been removed. Further, the deodorizing honeycomb filter decomposes the adsorbed odorous substance by a catalyst to suppress the diffusion of the odor. When the deodorizing honeycomb filter adsorbs an odorous substance, the deodorizing ability gradually decreases. If the deodorizing honeycomb filter having a reduced deodorizing ability is continuously used, the malodor cannot be removed and diffuses to the downstream side, which may make it impossible to maintain the regulatory standards of the Malodor Prevention Law. Therefore, it is necessary to replace the deodorizing honeycomb filter having a reduced deodorizing ability.

特開2010−46172号公報Japanese Unexamined Patent Publication No. 2010-46172

脱臭用ハニカムフィルターを交換する適切なタイミングを知るために、脱臭用ハニカムフィルターの寿命の判定が行われている。一般的には、臭気源である厨房や工場が稼働している時に、脱臭用ハニカムフィルターの上流側(1次側)と下流側(2次側)とにおいてサンプルとなる空気を採取して、テストラボ等に運び、三点比較式臭袋法によって臭気濃度の低減率(脱臭効率、捕集効率ともいう)を算出して指標とする。しかし、発生する臭気の原臭濃度は一定ではなく、脱臭用ハニカムフィルターが設置されている環境(例えば天気や気温)や、調理される献立(オーダー)等によって大きく変動する。従って、臭気測定結果から脱臭能力の変化を正確に評価することは困難である。例えば、一時的に原臭濃度が上昇すると、脱臭用ハニカムフィルターの下流側(2次側)の臭気濃度も上昇する。さらに、原臭濃度に応じて脱臭効率自体も変化する。そのため、臭気測定結果はあくまでも脱臭ハニカムフィルターの脱臭能力を間接的に示すデータに過ぎず、脱臭能力を直接的に示す指標とは言えない。また、三点比較式臭袋法による臭気の測定は、人間の嗅覚に依存するものであり、臭気判定士の資格を有する専門家でないと実施できない。従って、一般的な飲食店や工場や企業では実施できないことが多く、専門の分析機関に依頼する必要があり、例えば2週間程度の時間と測定回数に比例した高いコストを要するという問題がある。 In order to know the appropriate timing for replacing the deodorizing honeycomb filter, the life of the deodorizing honeycomb filter is determined. Generally, when a kitchen or factory, which is an odor source, is operating, sample air is collected on the upstream side (primary side) and the downstream side (secondary side) of the deodorizing honeycomb filter. It is carried to a test laboratory, etc., and the reduction rate of odor concentration (also called deodorization efficiency or collection efficiency) is calculated by the three-point comparison type odor bag method and used as an index. However, the concentration of the original odor of the generated odor is not constant, and varies greatly depending on the environment in which the deodorizing honeycomb filter is installed (for example, weather and temperature), the menu to be cooked (order), and the like. Therefore, it is difficult to accurately evaluate the change in deodorizing ability from the odor measurement result. For example, when the undiluted odor concentration temporarily increases, the odor concentration on the downstream side (secondary side) of the deodorizing honeycomb filter also increases. Furthermore, the deodorizing efficiency itself changes depending on the concentration of the original odor. Therefore, the odor measurement result is merely data that indirectly indicates the deodorizing ability of the deodorizing honeycomb filter, and cannot be said to be an index that directly indicates the deodorizing ability. In addition, the measurement of odor by the three-point comparative odor bag method depends on the human sense of smell and can only be performed by a qualified expert as an odor judge. Therefore, it is often not possible to carry out at a general restaurant, factory or company, and it is necessary to ask a specialized analysis institution, for example, there is a problem that a high cost proportional to the time of about two weeks and the number of measurements is required.

そこで、本発明の目的は、前述した問題点を解決し、操作が簡単で短時間で実施できて精度が高い、物理吸着型フィルターの寿命判定方法および寿命判定装置を提供することにある。 Therefore, an object of the present invention is to solve the above-mentioned problems and to provide a method for determining the life of a physical adsorption type filter and a device for determining the life of the physical adsorption type filter, which are easy to operate, can be carried out in a short time, and have high accuracy.

本発明の物理吸着型フィルターの寿命判定方法は、物理吸着型フィルターに標準ガスを供給しつつ当該物理吸着型フィルターを通過したガスを採取し、採取したガスの中の特定の物質の濃度を測定して、標準ガスの中の物質の濃度と比較して捕集効率を算出する捕集効率算出ステップを含み、未使用の物理吸着型フィルターに対して捕集効率測定ステップを複数回行って、複数回算出した捕集効率と、標準ガスの当該物理吸着型フィルターへの累積供給時間との関係を示す破過曲線を作成しておき、破過曲線を作成した後に、寿命判定の対象である物理吸着型フィルターに対して捕集効率測定ステップを行い、算出した捕集効率と破過曲線とを対比して当該物理吸着型フィルターの寿命を判定することを特徴とする。 In the method for determining the life of a physical adsorption type filter of the present invention, a gas that has passed through the physical adsorption type filter is collected while supplying a standard gas to the physical adsorption type filter, and the concentration of a specific substance in the collected gas is measured. Then, the collection efficiency calculation step of calculating the collection efficiency by comparing with the concentration of the substance in the standard gas is included, and the collection efficiency measurement step is performed multiple times for the unused physical adsorption type filter. A breakthrough curve showing the relationship between the collection efficiency calculated multiple times and the cumulative supply time of the standard gas to the physical adsorption type filter is created, and after the breakthrough curve is created, the life is determined. It is characterized in that a collection efficiency measurement step is performed on the physical adsorption type filter, and the life of the physical adsorption type filter is determined by comparing the calculated collection efficiency with the breakthrough curve.

本発明の物理吸着型フィルターの寿命判定装置は、物理吸着型フィルターの上流側に接続されている、標準ガスを収容した標準ガス供給手段と、当該物理吸着型フィルターを通過したガスを採取するガス採取手段と、採取したガスの中の特定の物質の濃度を測定して、標準ガスの中の物質の濃度と比較して捕集効率を算出する制御手段と、を有し、制御手段は、未使用の物理吸着型フィルターに対して標準ガス供給手段から標準ガスを連続的に供給させている間に、当該物理吸着型フィルターを通過したガスの採取と、採取したガスの中の特定の物質の濃度の測定と、捕集効率の算出とを、間欠的に複数回行って、複数回算出した捕集効率と、標準ガスの当該物理吸着型フィルターへの累積供給時間との関係を示す破過曲線を作成するとともに、破過曲線を作成した後に、寿命判定の対象である物理吸着型フィルターに対して標準ガス供給手段から標準ガスを供給させて、当該物理吸着型フィルターを通過したガスの採取と、採取したガスの中の特定の物質の濃度の測定と、捕集効率の算出とを行なって、算出した捕集効率と破過曲線とを対比して当該物理吸着型フィルターの寿命を判定することを特徴とする。 The life determination device of the physical adsorption type filter of the present invention includes a standard gas supply means accommodating a standard gas connected to the upstream side of the physical adsorption type filter and a gas for collecting gas that has passed through the physical adsorption type filter. The control means includes a collection means and a control means for measuring the concentration of a specific substance in the collected gas and calculating the collection efficiency in comparison with the concentration of the substance in the standard gas. While the standard gas is continuously supplied from the standard gas supply means to the unused physical adsorption type filter, the gas collected through the physical adsorption type filter and the specific substance in the collected gas are collected. The measurement of the concentration and the calculation of the collection efficiency are performed multiple times intermittently, and the relationship between the collection efficiency calculated multiple times and the cumulative supply time of the standard gas to the physical adsorption type filter is shown. After creating the overcurve and the breaking curve, the standard gas is supplied from the standard gas supply means to the physical adsorption type filter that is the target of the life determination, and the gas that has passed through the physical adsorption type filter is supplied. The life of the physical adsorption type filter is determined by comparing the calculated collection efficiency and the breakthrough curve by collecting, measuring the concentration of a specific substance in the collected gas, and calculating the collection efficiency. It is characterized by making a judgment.

本発明によると、操作が簡単で短時間で実施できて精度が高い、物理吸着型フィルターの寿命判定方法および寿命判定装置が提供される。 According to the present invention, there is provided a method for determining the life of a physical adsorption type filter and a device for determining the life of a physical adsorption type filter, which are easy to operate, can be carried out in a short time, and have high accuracy.

本発明の寿命判定方法の対象である物理吸着型フィルターの一例である脱臭用ハニカムフィルターの斜視図であるIt is a perspective view of the honeycomb filter for deodorization which is an example of the physical adsorption type filter which is the object of the life determination method of this invention. 図1に示す脱臭用ハニカムフィルターの設置状態を示す斜視図である。It is a perspective view which shows the installation state of the deodorizing honeycomb filter shown in FIG. 本発明の脱臭用ハニカムフィルターの寿命判定方法において作成した破過曲線の一例を示すグラフである。It is a graph which shows an example of the breakthrough curve created in the life determination method of the deodorizing honeycomb filter of this invention. 図1に示す脱臭用ハニカムフィルターの寿命判定装置を模式的に示す図である。It is a figure which shows typically the life determination apparatus of the deodorizing honeycomb filter shown in FIG. 1. 本発明の脱臭用ハニカムフィルターの寿命判定方法に用いられる治具の一例を示す斜視図である。It is a perspective view which shows an example of the jig used for the life determination method of the honeycomb filter for deodorization of this invention. 図5に示す治具を用いた脱臭用ハニカムフィルターの寿命判定装置の一例を示す正面図である。It is a front view which shows an example of the life determination apparatus of the deodorizing honeycomb filter using the jig shown in FIG.

以下、本発明の好適な実施形態について図面を参照して説明する。
図1に、本発明の寿命判定方法の対象である物理吸着型フィルターの一例である脱臭用ハニカムフィルター1が示されている。この脱臭用ハニカムフィルター1は、立方体または直方体状であり、脱臭すべき空気の流れ方向に沿って延びる多数の細孔1aを有している。図示しないが、この脱臭用ハニカムフィルター1に、触媒物質が担持または含有されている。例えば、図2に示すように、臭気源である厨房や工場に設置された排気ダクト2の内部に、1つまたは複数の脱臭用ハニカムフィルター1が配置される。厨房や工場から排気ダクト2内に吸引した空気を、脱臭用ハニカムフィルター1を通過させた後に排出する。空気が脱臭用ハニカムフィルター1を通過する際に、脱臭用ハニカムフィルター1は空気中に含まれている臭気物質(例えばアセトアルデヒド、トリメチルアミン、酢酸、アミン類、アンモニアなど)を物理的に吸着する。そして、脱臭用ハニカムフィルター1に担持または含有された触媒物質が、吸着した臭気物質を分解する。こうして、脱臭用ハニカムフィルター1を通過して臭気物質が除去された空気が、排気ダクト2から外部に排出される。この脱臭用ハニカムフィルター1は、脱臭能力が低下したら交換する必要がある。この交換の適切なタイミングを把握するために、脱臭用ハニカムフィルター1の寿命の判定を行う必要がある。本実施形態の脱臭用ハニカムフィルター1の寿命判定方法について以下に説明する。
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a deodorizing honeycomb filter 1 which is an example of a physical adsorption type filter which is a target of the life determination method of the present invention. The deodorizing honeycomb filter 1 is cubic or rectangular parallelepiped, and has a large number of pores 1a extending along the flow direction of air to be deodorized. Although not shown, the deodorizing honeycomb filter 1 carries or contains a catalytic substance. For example, as shown in FIG. 2, one or a plurality of deodorizing honeycomb filters 1 are arranged inside an exhaust duct 2 installed in a kitchen or a factory which is an odor source. The air sucked into the exhaust duct 2 from the kitchen or factory is discharged after passing through the deodorizing honeycomb filter 1. When air passes through the deodorizing honeycomb filter 1, the deodorizing honeycomb filter 1 physically adsorbs odorous substances (for example, acetaldehyde, trimethylamine, acetic acid, amines, ammonia, etc.) contained in the air. Then, the catalytic substance carried or contained in the deodorizing honeycomb filter 1 decomposes the adsorbed odorous substance. In this way, the air from which the odorous substance has been removed has passed through the deodorizing honeycomb filter 1 is discharged to the outside from the exhaust duct 2. The deodorizing honeycomb filter 1 needs to be replaced when the deodorizing ability is lowered. In order to grasp the appropriate timing of this replacement, it is necessary to determine the life of the deodorizing honeycomb filter 1. The method of determining the life of the deodorizing honeycomb filter 1 of the present embodiment will be described below.

本実施形態の脱臭用ハニカムフィルター1の寿命判定方法は、脱臭用ハニカムフィルター1等の物理吸着型フィルターに標準ガスを供給しつつ、その物理吸着型フィルターを通過したガスを採取し、採取したガスの中の特定の物質の濃度を測定して、標準ガスの中のその物質の濃度と比較して捕集効率を算出する捕集効率算出ステップを用いて行う。標準ガスは、特定の物質(例えば臭気物質)の混合割合が予め判っているガスである。まず、未使用の物理吸着型フィルターに対して捕集効率測定ステップを複数回行って、複数回算出した捕集効率と、標準ガスの物理吸着型フィルターへの累積供給時間との関係を示す図3に示すような破過曲線を作成する。破過曲線を作成するための複数回の捕集効率算出ステップでは、未使用の物理吸着型フィルターに対して連続的に標準ガスを供給している間に、物理吸着型フィルターを通過したガスの採取と、採取したガスの中の特定の物質の濃度の測定と、捕集効率の算出とを、間欠的に複数回行う。 In the method for determining the life of the deodorizing honeycomb filter 1 of the present embodiment, while supplying a standard gas to a physical adsorption type filter such as the deodorizing honeycomb filter 1, the gas that has passed through the physical adsorption type filter is collected and the collected gas is collected. It is carried out using the collection efficiency calculation step of measuring the concentration of a specific substance in the gas and calculating the collection efficiency by comparing with the concentration of the substance in the standard gas. The standard gas is a gas in which the mixing ratio of a specific substance (for example, an odorous substance) is known in advance. First, a diagram showing the relationship between the collection efficiency calculated multiple times by performing the collection efficiency measurement step for an unused physical adsorption type filter multiple times and the cumulative supply time of the standard gas to the physical adsorption type filter. Create a breakthrough curve as shown in 3. In multiple collection efficiency calculation steps to create a breakthrough curve, the gas that has passed through the physisorption filter while continuously supplying standard gas to the unused physisorption filter. Collection, measurement of the concentration of a specific substance in the collected gas, and calculation of collection efficiency are performed intermittently multiple times.

こうして破過曲線を作成した後に、寿命判定の対象である物理吸着型フィルターに対して捕集効率測定ステップを行い、算出した捕集効率と破過曲線とを対比してその物理吸着型フィルターの寿命を判定する。このように物理吸着型フィルターの寿命を判定する際には、測定した捕集効率が破過曲線の何処に位置するかによって寿命の残り時間を求めることができる。一例としては、破過曲線に、寿命判定の対象である物理吸着型フィルターの使用可能な最低限の捕集効率(図3に示す例では約58%)の点P1をプロットしておく。そして、寿命判定の対象である物理吸着型フィルターの、測定した捕集効率に対応する点P2を調べる。破過曲線上において、標準ガスの供給開始から点P1までの時間間隔t1が、その物理吸着型フィルターの有効寿命である。一方、標準ガスの供給開始から点P2までの時間間隔t2が、その物理吸着型フィルターの使用による性能低下の程度に相当する。そこで、この標準ガスの供給開始から点P1までの時間間隔t1に対する、標準ガスの供給開始から点P2までの時間間隔t2の割合に基づいて、寿命の残り時間を求める。 After creating the breakthrough curve in this way, a collection efficiency measurement step is performed on the physical adsorption type filter that is the target of life determination, and the calculated collection efficiency is compared with the breakthrough curve of the physical adsorption type filter. Determine the lifespan. In this way, when determining the life of the physical adsorption type filter, the remaining time of the life can be obtained depending on where the measured collection efficiency is located on the breakthrough curve. As an example, a point P1 having a minimum usable collection efficiency (about 58% in the example shown in FIG. 3) of the physical adsorption type filter to be determined for life is plotted on the breakthrough curve. Then, the point P2 corresponding to the measured collection efficiency of the physical adsorption type filter, which is the object of life determination, is investigated. On the breakthrough curve, the time interval t1 from the start of supply of the standard gas to the point P1 is the effective life of the physical adsorption type filter. On the other hand, the time interval t2 from the start of supply of the standard gas to the point P2 corresponds to the degree of performance deterioration due to the use of the physical adsorption type filter. Therefore, the remaining time of the life is obtained based on the ratio of the time interval t2 from the start of supply of the standard gas to the point P2 with respect to the time interval t1 from the start of supply of the standard gas to the point P1.

この物理吸着型フィルターの寿命判定方法について、より詳細に説明する。前述したように、寿命判定の基準となる破過曲線を作成するために、除去対象とする物質(例えば臭気物質)の濃度が判明している基準ガスを、未使用の脱臭用ハニカムフィルター1の上流側(1次側)から所定の風量(所定の面速)で供給する。そして、脱臭用ハニカムフィルター1を通過したガスを下流側(2次側)において採取して、採取したガス中の臭気物質の濃度を測定する。一例としては、図4に模式的に示す寿命判定装置を用いる。具体的には、標準ガスを収容した標準ガス供給手段、例えばバッグ3を脱臭用ハニカムフィルター1の上流側(1次側)に配置する。必要に応じて、バッグ3の上流側に、バッグ3に標準ガスを供給するボンベ6を配置してもよい。そして、脱臭用ハニカムフィルター1の下流側(2次側)にポンプ4を介してサンプリングバッグ(ガス採取手段)5を配置する。制御手段15がポンプ4を作動させることによりバッグ3内の標準ガスを吸引して脱臭用ハニカムフィルター1を通過させる。そして、脱臭用ハニカムフィルター1を通過したガスをサンプリングバッグ5に採取(収集)する。こうして脱臭用ハニカムフィルター1の下流側(2次側)においてサンプリングバッグ5に採取したガス中の臭気物質の濃度を測定して、予め判明している基準ガスの臭気物質の濃度と比較して、捕集効率を求める。基準ガスの供給を継続して行い、その間に脱臭用ハニカムフィルター1の下流側(2次側)におけるガスの採取および臭気物質の捕集効率の算出を連続的または間欠的に行う。そして、基準ガスを供給している累積供給時間と臭気物質の捕集効率との関係をグラフに表して、図3に示すような破過曲線を作成する。この破過曲線が、本実施形態の脱臭用ハニカムフィルター1の寿命判定方法の基準になる。なお、脱臭用ハニカムフィルター1を有効に使用するために必要な最低限の捕集効率(寿命ライン)を予め設定しておく。基準ガス中の臭気物質の濃度が低いと破過曲線の作成に膨大な時間を要するため、基準ガスには非常に高濃度の臭気物質を含有させておく。基準ガス中の臭気物質の濃度は、実際に脱臭用ハニカムフィルター1を設置する環境の空気中の臭気物質の濃度に比べてはるかに高い。 The method of determining the life of this physical adsorption type filter will be described in more detail. As described above, in order to create a breakthrough curve that serves as a reference for determining the life, a reference gas having a known concentration of a substance to be removed (for example, an odorous substance) is used in the unused deodorizing honeycomb filter 1. It is supplied from the upstream side (primary side) with a predetermined air volume (predetermined surface speed). Then, the gas that has passed through the deodorizing honeycomb filter 1 is collected on the downstream side (secondary side), and the concentration of the odorous substance in the collected gas is measured. As an example, the life determination device schematically shown in FIG. 4 is used. Specifically, a standard gas supply means containing the standard gas, for example, a bag 3 is arranged on the upstream side (primary side) of the deodorizing honeycomb filter 1. If necessary, a cylinder 6 for supplying standard gas to the bag 3 may be arranged on the upstream side of the bag 3. Then, the sampling bag (gas sampling means) 5 is arranged on the downstream side (secondary side) of the deodorizing honeycomb filter 1 via the pump 4. When the control means 15 operates the pump 4, the standard gas in the bag 3 is sucked and passed through the deodorizing honeycomb filter 1. Then, the gas that has passed through the deodorizing honeycomb filter 1 is collected (collected) in the sampling bag 5. In this way, the concentration of the odorous substance in the gas collected in the sampling bag 5 was measured on the downstream side (secondary side) of the deodorizing honeycomb filter 1 and compared with the concentration of the odorous substance of the reference gas known in advance. Find the collection efficiency. The reference gas is continuously supplied, during which the gas is collected on the downstream side (secondary side) of the deodorizing honeycomb filter 1 and the odorous substance collection efficiency is calculated continuously or intermittently. Then, the relationship between the cumulative supply time for supplying the reference gas and the collection efficiency of the odorous substance is represented in a graph, and a breakthrough curve as shown in FIG. 3 is created. This breaking curve serves as a reference for the life determination method of the deodorizing honeycomb filter 1 of the present embodiment. The minimum collection efficiency (lifeline) required for effective use of the deodorizing honeycomb filter 1 is set in advance. If the concentration of the odorous substance in the reference gas is low, it takes an enormous amount of time to create a breakthrough curve, so the reference gas should contain a very high concentration of the odorous substance. The concentration of the odorous substance in the reference gas is much higher than the concentration of the odorous substance in the air of the environment in which the deodorizing honeycomb filter 1 is actually installed.

前述したように未使用の脱臭用ハニカムフィルター1を用いて破過曲線を作成した上で、寿命判定の対象とする脱臭用ハニカムフィルター1の上流側(1次側)から基準ガスを所定の風量で供給する。そして、脱臭用ハニカムフィルター1の下流側(2次側)においてガスを採取して、臭気物質の捕集効率を算出する。この作業は、破過曲線を作成するための工程と実質的に同様であり、前述した捕集効率算出ステップを用いて行い、未使用の脱臭用ハニカムフィルター1から、実際に寿命を判定すべき脱臭用ハニカムフィルター1に変わるだけである。ただし、ボンベ6が不要であればボンベ6を省略してもよい。脱臭用ハニカムフィルター1の下流側(2次側)で採取したガスから算出した捕集効率を、予め作成した破過曲線および寿命ラインと比較する。仮に、算出した捕集効率が寿命ライン以下である場合には、脱臭用ハニカムフィルター1の有効寿命に既に到達していると判断して、その脱臭用ハニカムフィルター1の使用を止めて交換することが必要であると判定する。それに対し、算出した捕集効率が寿命ラインより高い場合には、脱臭用ハニカムフィルター1の有効寿命に到達していないと判断して、その脱臭用ハニカムフィルター1は使用継続可能であり、まだ交換不要であると判定する。さらに、算出した捕集効率が破過曲線上の何処に位置するかを確認する。破過曲線は、未使用の脱臭用ハニカムフィルター1の使用開始から寿命ラインに到達する点P1までの捕集効率の低下状況を示している。従って、算出した捕集効率が、破過曲線上で使用開始から寿命ラインに到達する点P1に至るまでの何処に位置するかによって、寿命判定の対象である脱臭用ハニカムフィルター1の性能低下の程度を知ることができるとともに、今後使用可能な残りの有効寿命を推定することができる。この時、グラフの縦軸である捕集効率のみに応じて、寿命判定の対象である脱臭用ハニカムフィルター1に対応する破過曲線上の点P2の位置を決める。点P2の位置を設定する上で、グラフの横軸である時間は考慮しない。例えば、算出した捕集効率が、破過曲線上における使用開始点と点P1との間の点P2に位置し、時間を表す横軸において点P2が使用開始から寿命ラインに到達する点P1まで範囲のちょうど中間に位置する場合には、脱臭用ハニカムフィルター1は有効寿命の半分を経過したと判断する。従って、その脱臭用ハニカムフィルター1は、それまでの実際の累積使用時間と同じ時間だけ引き続き使用可能であると判定する。仮に脱臭用ハニカムフィルター1の累積使用時間が3年間であるとしたら、今後3年間使用した後に交換すればよいと言える。 As described above, after creating a breakthrough curve using the unused deodorizing honeycomb filter 1, a predetermined air volume is applied to the reference gas from the upstream side (primary side) of the deodorizing honeycomb filter 1 whose life is to be determined. Supply at. Then, the gas is collected on the downstream side (secondary side) of the deodorizing honeycomb filter 1 to calculate the collection efficiency of the odorous substance. This work is substantially the same as the step for creating the breakthrough curve, and should be performed using the above-mentioned collection efficiency calculation step, and the life should be actually determined from the unused deodorizing honeycomb filter 1. It only changes to the deodorizing honeycomb filter 1. However, if the cylinder 6 is unnecessary, the cylinder 6 may be omitted. The collection efficiency calculated from the gas collected on the downstream side (secondary side) of the deodorizing honeycomb filter 1 is compared with the breakthrough curve and the life line prepared in advance. If the calculated collection efficiency is below the life line, it is determined that the effective life of the deodorizing honeycomb filter 1 has already been reached, and the deodorizing honeycomb filter 1 should be stopped and replaced. Is determined to be necessary. On the other hand, when the calculated collection efficiency is higher than the life line, it is determined that the effective life of the deodorizing honeycomb filter 1 has not been reached, and the deodorizing honeycomb filter 1 can be continued to be used and is still replaced. Judge that it is unnecessary. Furthermore, it is confirmed where the calculated collection efficiency is located on the breakthrough curve. The breakthrough curve shows the state of decrease in collection efficiency from the start of use of the unused deodorizing honeycomb filter 1 to the point P1 at which the life line is reached. Therefore, the performance of the deodorizing honeycomb filter 1, which is the target of life determination, deteriorates depending on where the calculated collection efficiency is located on the breakthrough curve from the start of use to the point P1 where the life line is reached. It is possible to know the degree and estimate the remaining effective life that can be used in the future. At this time, the position of the point P2 on the breakthrough curve corresponding to the deodorizing honeycomb filter 1 which is the target of the life determination is determined only according to the collection efficiency which is the vertical axis of the graph. In setting the position of the point P2, the time on the horizontal axis of the graph is not taken into consideration. For example, the calculated collection efficiency is located at the point P2 between the start point of use and the point P1 on the breakthrough curve, and from the start of use to the point P1 where the point P2 reaches the life line on the horizontal axis representing time. If it is located exactly in the middle of the range, it is determined that the deodorizing honeycomb filter 1 has passed half of its effective life. Therefore, it is determined that the deodorizing honeycomb filter 1 can be continuously used for the same time as the actual cumulative usage time up to that point. If the cumulative usage time of the deodorizing honeycomb filter 1 is 3 years, it can be said that the honeycomb filter 1 should be replaced after being used for the next 3 years.

また、時間を表す横軸において点P2が使用開始から寿命ラインに到達する点P1までの範囲の1/3の位置にある場合には、脱臭用ハニカムフィルター1は有効寿命の1/3を経過したと判断する。従って、その脱臭用ハニカムフィルター1は、それまでの累積使用時間の2倍の時間だけ引き続き使用可能であると判定する。仮に、脱臭用ハニカムフィルター1の累積使用時間が3年間であるとしたら、今後6年間使用した後に交換すればよいと言える。 Further, when the point P2 is at the position of 1/3 of the range from the start of use to the point P1 reaching the life line on the horizontal axis representing time, the deodorizing honeycomb filter 1 has passed 1/3 of the effective life. Judge that it was done. Therefore, it is determined that the deodorizing honeycomb filter 1 can be continuously used for twice the cumulative usage time up to that point. If the cumulative usage time of the deodorizing honeycomb filter 1 is 3 years, it can be said that the honeycomb filter 1 should be replaced after being used for the next 6 years.

図3には、累積使用時間がそれぞれ7年間、10年間、13年間である脱臭用ハニカムフィルター1の捕集効率を示している。これらの脱臭用ハニカムフィルター1はいずれも寿命ラインを下回っているため、直ちに交換する必要があると判定される。 FIG. 3 shows the collection efficiency of the deodorizing honeycomb filter 1 having a cumulative usage time of 7 years, 10 years, and 13 years, respectively. Since all of these deodorizing honeycomb filters 1 are below the life line, it is determined that they need to be replaced immediately.

このような寿命判定方法に基づいて、脱臭用ハニカムフィルター1の実際の累積使用時間Aと、有効寿命の残りの時間Bは、以下の関係式で表すことができる。
B=A×(1−t2/t1)=A×(t1−t2)/t1
この関係式に基づいて寿命を判定することが可能である。時間t1およびt2の数値は、破過曲線作成のための捕集効率測定時の実際の時間であってもよいが、時間t1を1として表した数値であってもよい。なお、時間t2の値は、算出した捕集効率に基づいてグラフ上で求めた値であり、寿命判定の対象である脱臭用ハニカムフィルター1の実際の累積使用時間ではない。
Based on such a life determination method, the actual cumulative usage time A of the deodorizing honeycomb filter 1 and the remaining time B of the effective life can be expressed by the following relational expression.
B = A × (1-t2 / t1) = A × (t1-t2) / t1
It is possible to determine the life based on this relational expression. The numerical values of the times t1 and t2 may be the actual time at the time of collecting the collection efficiency for creating the breakthrough curve, but may be the numerical values expressed with the time t1 as 1. The value of time t2 is a value obtained on a graph based on the calculated collection efficiency, and is not the actual cumulative usage time of the deodorizing honeycomb filter 1 which is the target of life determination.

従来の寿命判定方法では、寿命判定の対象である脱臭用ハニカムフィルター1が、既に有効寿命を過ぎており交換が必要であるか否かを判定することのみが可能であった。これに加えて、本実施形態では、破過曲線を用いることによって有効寿命の残りの時間を知ることができる。従って、脱臭用ハニカムフィルター1を交換すべきタイミングを事前に知り、脱臭用ハニカムフィルター1の交換予定を予め設定することができる。交換のタイミングが遅れてしまうことが抑制できる。 In the conventional life determination method, it is only possible to determine whether or not the deodorizing honeycomb filter 1, which is the target of the life determination, has already reached the effective life and needs to be replaced. In addition to this, in the present embodiment, the remaining time of the effective life can be known by using the breakthrough curve. Therefore, the timing at which the deodorizing honeycomb filter 1 should be replaced can be known in advance, and the replacement schedule of the deodorizing honeycomb filter 1 can be set in advance. It is possible to prevent the replacement timing from being delayed.

また、従来の寿命判定方法では、人間の嗅覚に依存する方法(例えば三点比較式臭袋法)による臭気の測定を行っていたので、臭気判定士でないと実施できず、専門の分析機関に依頼するために長時間を必要とするとともに高コストであった。しかし、本実施形態では、人間の感覚に依存しない方法(例えばガス検知管法等)で特定の物質の濃度を測定することによって寿命の判定が可能である。専門の分析機関に依頼する必要がないため、処理の短時間化および低コスト化が可能である。この脱臭用ハニカムフィルター(物理吸着型フィルター)1の寿命の判定は、例えば10分以下の時間で実施可能であり、しかも、脱臭用ハニカムフィルター1をテストラボ等に運ぶ必要はなく、その脱臭用ハニカムフィルター1が実際に使用されている現場で実施可能である。また、本実施形態では、寿命判定の対象である脱臭用ハニカムフィルター1が設置された環境下でサンプルとなる空気を採取するのではなく、その脱臭用ハニカムフィルター1に標準ガスを供給して脱臭用ハニカムフィルター1を通過したガスを採取して濃度測定を行う。従って、脱臭用ハニカムフィルター1が設置されている環境(例えば天気や気温)や調理される献立(オーダー)等の影響を受けることはなく、原臭濃度の変化やそれに伴う脱臭効率の変化の影響もなく、高精度の寿命判定が可能である。 In addition, in the conventional lifespan determination method, the odor is measured by a method that depends on the human sense of smell (for example, the three-point comparison type odor bag method). It took a long time to make a request and it was expensive. However, in the present embodiment, the life can be determined by measuring the concentration of a specific substance by a method that does not depend on human senses (for example, a gas detector tube method or the like). Since it is not necessary to ask a specialized analysis institution, it is possible to shorten the processing time and reduce the cost. The life of the deodorizing honeycomb filter (physical adsorption type filter) 1 can be determined in, for example, 10 minutes or less, and it is not necessary to carry the deodorizing honeycomb filter 1 to a test laboratory or the like, and the deodorizing honeycomb filter 1 does not need to be carried to a test laboratory or the like. It can be carried out in the field where the filter 1 is actually used. Further, in the present embodiment, instead of collecting sample air in an environment where the deodorizing honeycomb filter 1 which is the target of life determination is installed, standard gas is supplied to the deodorizing honeycomb filter 1 for deodorization. The gas that has passed through the honeycomb filter 1 is collected and the concentration is measured. Therefore, it is not affected by the environment in which the deodorizing honeycomb filter 1 is installed (for example, weather or temperature) or the menu (order) to be cooked, and is affected by changes in the undiluted odor concentration and accompanying changes in deodorizing efficiency. It is possible to determine the life with high accuracy.

以上説明した脱臭用ハニカムフィルター1の寿命判定方法の具体的な実施例について説明する。本実施例では、脱臭用ハニカムフィルター1の破過曲線の作成のためのデータ取得を行った。図4に示すように、所定の濃度(例えば10〜20ppm)のアンモニアを含む標準ガスを収容したボンベ6とボンベ6に接続された大容量のバッグ(例えばテドラー(登録商標)バッグ)3とを、未使用の脱臭用ハニカムフィルター1の上流側(1次側)に配置した。一方、ポンプ4を脱臭用ハニカムフィルター1の下流側(2次側)に配置した。そして、ポンプ4を作動させて、脱臭用ハニカムフィルター1を介して標準ガスを吸引し、吸引したガスを一定時間おきにサンプリングバッグ(臭袋)5に回収して、ガス検知管法(例えば北川式検知管105SDを用いる方法)でアンモニアの濃度を検出した。なお、一定時間毎のガス回収時以外は、ポンプ4の下流側はサンプリングバッグ5に接続させず開放しておく。測定開始と同時に、バッグ3の2つのコック(図示せず)を開き、ボンベ6側と脱臭用ハニカムフィルター1側の両方向に対して開放した状態にする。それにより、脱臭用ハニカムフィルター1には所定の風量で標準ガスが供給され続ける。なお、この方法では、常に大気圧での測定が可能であり圧力の補正等を必要としないという特徴がある。このようにして複数回の濃度検出を行って、それらの測定結果に基づいて捕集効率を求め、図3に示すような破過曲線を作成した。この時に用いられる脱臭用ハニカムフィルター1は、実際に寿命判定の対象になる脱臭用ハニカムフィルター1の新品の状態であることが好ましいが、同一種類(同一型番)の製品であれば別ロットで製造された製品であってもよい。 A specific embodiment of the method for determining the life of the deodorizing honeycomb filter 1 described above will be described. In this embodiment, data was acquired for creating a breakthrough curve of the deodorizing honeycomb filter 1. As shown in FIG. 4, a cylinder 6 containing a standard gas containing a predetermined concentration (for example, 10 to 20 ppm) of ammonia and a large-capacity bag (for example, a Tedlar (registered trademark) bag) 3 connected to the cylinder 6 are combined. , It was arranged on the upstream side (primary side) of the unused deodorizing honeycomb filter 1. On the other hand, the pump 4 is arranged on the downstream side (secondary side) of the deodorizing honeycomb filter 1. Then, the pump 4 is operated to suck the standard gas through the deodorizing honeycomb filter 1, and the sucked gas is collected in the sampling bag (odor bag) 5 at regular intervals, and the gas detector tube method (for example, Kitagawa) is used. The concentration of ammonia was detected by the method using the formula detector tube 105SD). The downstream side of the pump 4 is not connected to the sampling bag 5 and is left open except when the gas is recovered at regular intervals. At the same time as the start of measurement, the two cocks (not shown) of the bag 3 are opened so as to be open in both directions of the cylinder 6 side and the deodorizing honeycomb filter 1 side. As a result, the deodorizing honeycomb filter 1 is continuously supplied with the standard gas at a predetermined air volume. It should be noted that this method is characterized in that it can always measure at atmospheric pressure and does not require pressure correction or the like. In this way, the concentration was detected a plurality of times, the collection efficiency was obtained based on the measurement results, and the breakthrough curve as shown in FIG. 3 was created. The deodorizing honeycomb filter 1 used at this time is preferably in a new state of the deodorizing honeycomb filter 1 that is actually subject to life determination, but if it is a product of the same type (same model number), it is manufactured in a different lot. It may be a product that has been manufactured.

図3に示すような破過曲線を作成した後に、破過曲線作成のためのデータ作成時と同じ装置(図4参照)と同じ標準ガスを用いて、脱臭用ハニカムフィルター1の寿命の判定を行う。寿命判定の対象である脱臭用ハニカムフィルター1は、通常は数ヶ月または数年以上にわたって使用されたものである。この寿命判定の対象である脱臭用ハニカムフィルター1を、図4に示す寿命判定装置にセットする。ただし、ボンベ6が不要であれば、図4に示す寿命判定装置からボンベ6を省略してもよい。そして、ポンプ4を作動させて、破過曲線作成のためのデータ作成時と同じ標準ガスを、脱臭用ハニカムフィルター1を通過させてサンプリングバッグ5に収集する。サンプリングバッグ5に収集したガス中のアンモニアの濃度を、ガス検知管法等によって検出する。検出したアンモニアの濃度を、標準ガス中のアンモニアの濃度と比較して捕集効率を求める。こうして求めた捕集効率が、図3に示す破過曲線上の何処に位置するかを調べる。そして、寿命判定の対象である脱臭用ハニカムフィルター1に対応する破過曲線上の点P2を求めて、前述した関係式B=A×(1−t2/t1)=A×(t1−t2)/t1に基づいて、有効寿命の残りの時間を求める。 After creating the breakthrough curve as shown in FIG. 3, the life of the deodorizing honeycomb filter 1 is determined using the same device (see FIG. 4) and the same standard gas as when creating the data for creating the breakthrough curve. conduct. The deodorizing honeycomb filter 1 which is the object of life determination is usually used for several months or several years or more. The deodorizing honeycomb filter 1 which is the target of the life determination is set in the life determination device shown in FIG. However, if the cylinder 6 is unnecessary, the cylinder 6 may be omitted from the life determination device shown in FIG. Then, the pump 4 is operated to pass the same standard gas as at the time of data creation for creating the breakthrough curve through the deodorizing honeycomb filter 1 and collect it in the sampling bag 5. The concentration of ammonia in the gas collected in the sampling bag 5 is detected by a gas detector tube method or the like. The concentration of the detected ammonia is compared with the concentration of ammonia in the standard gas to determine the collection efficiency. It is investigated where the collection efficiency obtained in this way is located on the breakthrough curve shown in FIG. Then, the point P2 on the fracture curve corresponding to the deodorizing honeycomb filter 1 which is the target of the life determination is obtained, and the above-mentioned relational expression B = A × (1-t2 / t1) = A × (t1-t2). The remaining time of the effective life is calculated based on / t1.

この脱臭用ハニカムフィルター1の寿命判定方法においては、標準ガスが大気と混合することなく閉じた系の中で脱臭用ハニカムフィルター1を通過し、さらにこの閉じた系の中で、脱臭用ハニカムフィルター1以外の部分に吸着されないようにする必要がある。特に、ポンプ4内の流通路は取り外して洗浄できるものであることが好ましい。 In the method for determining the life of the deodorizing honeycomb filter 1, the standard gas passes through the deodorizing honeycomb filter 1 in a closed system without being mixed with the atmosphere, and further, in this closed system, the deodorizing honeycomb filter 1 is used. It is necessary to prevent it from being adsorbed to a portion other than 1. In particular, it is preferable that the flow passage in the pump 4 can be removed and washed.

標準ガスは、脱臭用ハニカムフィルター1の実際の使用時に問題になる臭気物質を含むことが好ましいが、脱臭用ハニカムフィルター1で吸着可能な物質を含むガスであれば他のガスも使用可能である。ただし、管理濃度や許容濃度が定められているガスの場合には、誤ってガスが漏れた場合等の危険性を考慮する必要がある。従って、管理濃度以下および許容濃度以下であるガスを用いることが望ましい。さらに、一般的に市販されている検知管において、目盛上限を超えることなく、かつ薄すぎない濃度の物質を含んでいることが好ましい。例えば、低濃度のトルエン、アンモニア、ホルムアルデヒドなどを含むガスが好適に用いられる。 The standard gas preferably contains an odorous substance that causes a problem in the actual use of the deodorizing honeycomb filter 1, but other gases can be used as long as the gas contains a substance that can be adsorbed by the deodorizing honeycomb filter 1. .. However, in the case of gas for which the control concentration and allowable concentration are set, it is necessary to consider the risk of accidental gas leakage. Therefore, it is desirable to use a gas having a control concentration or less and an allowable concentration or less. Further, it is preferable that the detector tube generally on the market contains a substance having a concentration not exceeding the upper limit of the scale and not too thin. For example, a gas containing low concentrations of toluene, ammonia, formaldehyde and the like is preferably used.

図4に示すような寿命判定装置において、脱臭用ハニカムフィルター1の前後、すなわち脱臭用ハニカムフィルター1への標準ガスの供給部と、脱臭用ハニカムフィルターとポンプとの接続部とを構成するための治具の一例を図5に示している。この治具7は、互いに向かい合う1対の押さえ板8を有し、押さえ板8の互いに向かい合う面には弾性材層9がそれぞれ設けられている。弾性材層9および押さえ板8には貫通孔10が形成されている。このように弾性材層9を有する押さえ板8が、取付部材11を介してスライダー12に取り付けられている。スライダー12は、長尺のレール13に摺動可能に取り付けられている。従って、スライダー12と取付部材11と弾性材層9と押さえ板8とが一体的に、レール13に沿って移動可能である。レール13に沿う移動によって、1対の弾性材層9および押さえ板8が互いに接近したり離れたりすることができる。 In the life determination device as shown in FIG. 4, the front and rear of the deodorizing honeycomb filter 1, that is, the supply portion of the standard gas to the deodorizing honeycomb filter 1, and the connection portion between the deodorizing honeycomb filter and the pump are configured. An example of the jig is shown in FIG. The jig 7 has a pair of holding plates 8 facing each other, and elastic material layers 9 are provided on the facing surfaces of the holding plates 8 respectively. Through holes 10 are formed in the elastic material layer 9 and the holding plate 8. In this way, the holding plate 8 having the elastic material layer 9 is attached to the slider 12 via the attachment member 11. The slider 12 is slidably attached to the long rail 13. Therefore, the slider 12, the mounting member 11, the elastic material layer 9, and the holding plate 8 can be integrally moved along the rail 13. By moving along the rail 13, the pair of elastic layers 9 and the holding plate 8 can move toward and away from each other.

図5に示す治具7を用いて、図4に示すような寿命判定装置を構成した例を、図6に示している。この装置では、1対の弾性材層9および押さえ板8をレール13に沿って移動させて脱臭用ハニカムフィルター1を挟みつけ、弾性材層9を脱臭用ハニカムフィルター1の両面にそれぞれ密着させる。押さえ板8の弾性材層9と反対側の面に接続管14を取り付け、弾性材層9および押さえ板8の貫通孔10に連通させる。脱臭用ハニカムフィルター1の上流側(1次側)に配置された弾性材層9および押さえ板8から突出する接続管14に、標準ガスが収容されたバッグ3を接続する。一方、脱臭用ハニカムフィルター1の下流側(2次側)に配置された弾性材層9および押さえ板8から突出する接続管14にポンプ4を接続し、ポンプ4に接続管14を介してサンプリングバッグ5を接続する。この装置を用いて、前述した寿命判定方法を実施する。図5に示す治具7を用いると、弾性材層9を脱臭用ハニカムフィルター1の表面に密着させることにより、貫通孔10および接続管14以外に漏れないようにして、高精度かつ高効率の捕集効率測定が可能になる。 FIG. 6 shows an example in which the life determination device as shown in FIG. 4 is configured by using the jig 7 shown in FIG. In this device, a pair of elastic material layers 9 and holding plates 8 are moved along the rail 13 to sandwich the deodorizing honeycomb filter 1, and the elastic material layers 9 are brought into close contact with both sides of the deodorizing honeycomb filter 1. A connecting pipe 14 is attached to the surface of the holding plate 8 opposite to the elastic material layer 9, and communicates with the elastic material layer 9 and the through hole 10 of the holding plate 8. The bag 3 containing the standard gas is connected to the elastic material layer 9 arranged on the upstream side (primary side) of the deodorizing honeycomb filter 1 and the connecting pipe 14 protruding from the holding plate 8. On the other hand, the pump 4 is connected to the connecting pipe 14 protruding from the elastic material layer 9 and the holding plate 8 arranged on the downstream side (secondary side) of the deodorizing honeycomb filter 1, and the pump 4 is sampled via the connecting pipe 14. Connect the bag 5. Using this device, the life determination method described above is carried out. When the jig 7 shown in FIG. 5 is used, the elastic material layer 9 is brought into close contact with the surface of the deodorizing honeycomb filter 1 so that it does not leak to other than the through hole 10 and the connecting pipe 14, and is highly accurate and highly efficient. Collection efficiency can be measured.

本発明によると、各々の脱臭用ハニカムフィルター1の設置場所(厨房や工場等)や、寿命判定時の献立(オーダー)および天気等によって大きく変動する原臭濃度の影響を受けずに脱臭用ハニカムフィルター1の有効寿命の残り時間の判定を行うことができる。 According to the present invention, the deodorizing honeycomb is not affected by the installation location (kitchen, factory, etc.) of each deodorizing honeycomb filter 1, the menu (order) at the time of life determination, the original odor concentration which greatly fluctuates depending on the weather, and the like. The remaining time of the effective life of the filter 1 can be determined.

以上の説明では、脱臭用ハニカムフィルター1の寿命判定を例示しているが、それに限定されるわけではなく、物理吸着型フィルター全般の寿命判定に適用可能である。従って、捕集効率の測定対象は臭気物質に限られず、他の物質であってもよい。 In the above description, the life determination of the deodorizing honeycomb filter 1 is illustrated, but the present invention is not limited to this, and can be applied to the life determination of the entire physical adsorption type filter. Therefore, the measurement target of the collection efficiency is not limited to the odorous substance, and may be another substance.

1 脱臭用ハニカムフィルター(物理吸着型フィルター)
1a 細孔
2 排気ダクト
3 バッグ(標準ガス供給手段)
4 ポンプ
5 サンプリングバッグ(ガス採取手段)
6 ボンベ(標準ガス供給手段)
7 治具
8 押さえ板
9 弾性材層
10 貫通孔
11 取付部材
12 スライダー
13 レール
14 接続管
15 制御手段

1 Honeycomb filter for deodorization (physisorption type filter)
1a Pore 2 Exhaust duct 3 Bag (standard gas supply means)
4 Pump 5 Sampling bag (gas sampling means)
6 Cylinder (standard gas supply means)
7 Jig 8 Holding plate 9 Elastic material layer 10 Through hole 11 Mounting member 12 Slider 13 Rail 14 Connection pipe 15 Control means

Claims (10)

物理吸着型フィルターに標準ガスを供給しつつ当該物理吸着型フィルターを通過したガスを採取し、採取したガスの中の特定の物質の濃度を測定して、前記標準ガスの中の前記物質の濃度と比較して捕集効率を算出する捕集効率算出ステップを含み、
未使用の物理吸着型フィルターに対して前記捕集効率測定ステップを複数回行って、複数回算出した捕集効率と、前記標準ガスの当該物理吸着型フィルターへの累積供給時間との関係を示す破過曲線を作成しておき、
前記破過曲線を作成した後に、寿命判定の対象である物理吸着型フィルターに対して前記捕集効率測定ステップを行い、算出した捕集効率と前記破過曲線とを対比して当該物理吸着型フィルターの寿命を判定することを特徴とする、物理吸着型フィルターの寿命判定方法。
While supplying a standard gas to the physical adsorption type filter, the gas that has passed through the physical adsorption type filter is sampled, the concentration of a specific substance in the collected gas is measured, and the concentration of the substance in the standard gas is measured. Includes a collection efficiency calculation step that calculates the collection efficiency in comparison with
The collection efficiency measurement step is performed a plurality of times on an unused physical adsorption type filter, and the relationship between the collection efficiency calculated multiple times and the cumulative supply time of the standard gas to the physical adsorption type filter is shown. Create a breakthrough curve
After creating the breakthrough curve, the collection efficiency measurement step is performed on the physical adsorption type filter that is the target of the life determination, and the calculated collection efficiency is compared with the breakthrough curve to be compared with the physical adsorption type. A method for determining the life of a physical adsorption type filter, which comprises determining the life of a filter.
前記物理吸着型フィルターの寿命の判定は、当該物理吸着型フィルターが使用されている現場で実施可能であることを特徴とする、請求項1に記載の物理吸着型フィルターの寿命判定方法。 The method for determining the life of a physical adsorption type filter according to claim 1, wherein the determination of the life of the physical adsorption type filter can be carried out at a site where the physical adsorption type filter is used. 前記物理吸着型フィルターの寿命の判定は、10分以下の時間で実施可能であることを特徴とする、請求項1または2に記載の物理吸着型フィルターの寿命判定方法。 The method for determining the life of a physical adsorption type filter according to claim 1 or 2, wherein the determination of the life of the physical adsorption type filter can be performed in a time of 10 minutes or less. 前記破過曲線を作成するための複数回の前記捕集効率算出ステップでは、前記未使用の物理吸着型フィルターに対して連続的に標準ガスを供給している間に、当該物理吸着型フィルターを通過したガスの採取と、採取したガスの中の前記物質の濃度の測定と、前記捕集効率の算出とを、間欠的に複数回行うことを特徴とする、請求項1から3のいずれか1項に記載の物理吸着型フィルターの寿命判定方法。 In the multiple collection efficiency calculation steps for creating the breakthrough curve, the physical adsorption type filter is applied while the standard gas is continuously supplied to the unused physical adsorption type filter. Any of claims 1 to 3, wherein the collected gas is collected, the concentration of the substance in the collected gas is measured, and the collection efficiency is calculated intermittently a plurality of times. The method for determining the life of a physical adsorption type filter according to item 1. 前記寿命判定の対象である物理吸着型フィルターの寿命を判定する際には、測定した前記捕集効率が前記破過曲線の何処に位置するかによって寿命の残り時間を求めることを特徴とする、請求項1から4のいずれか1項に記載の物理吸着型フィルターの寿命判定方法。 When determining the life of the physical adsorption type filter that is the object of the life determination, it is characterized in that the remaining time of the life is obtained depending on where the measured collection efficiency is located on the breakthrough curve. The method for determining the life of a physical adsorption type filter according to any one of claims 1 to 4. 前記破過曲線に、前記寿命判定の対象である物理吸着型フィルターの使用可能な最低限の捕集効率の点P1をプロットしておき、
前記寿命判定の対象である物理吸着型フィルターの、測定した前記捕集効率に対応する点P2を調べ、前記破過曲線上において、前記標準ガスの供給開始から前記点P1までの時間間隔t1に対する、前記標準ガスの供給開始から前記点P2までの時間間隔t2の割合に基づいて、寿命の残り時間を求めることを特徴とする、請求項5に記載の物理吸着型フィルターの寿命判定方法。
The point P1 of the minimum usable collection efficiency of the physical adsorption type filter, which is the target of the life determination, is plotted on the breakthrough curve.
The point P2 corresponding to the measured collection efficiency of the physical adsorption type filter to be determined for the life is investigated, and the time interval t1 from the start of supply of the standard gas to the point P1 on the breakthrough curve is obtained. The method for determining the life of a physical adsorption type filter according to claim 5, wherein the remaining time of the life is obtained based on the ratio of the time interval t2 from the start of supply of the standard gas to the point P2.
前記寿命判定の対象である物理吸着型フィルターの実際の累積使用時間Aと、有効寿命の残りの時間Bとの関係は、B=A×(t1−t2)/t1であることを特徴とする、請求項6に記載の物理吸着型フィルターの寿命判定方法。 The relationship between the actual cumulative usage time A of the physical adsorption type filter, which is the target of the life determination, and the remaining time B of the effective life is B = A × (t1-t2) / t1. The method for determining the life of the physical adsorption type filter according to claim 6. 前記物理吸着型フィルターは脱臭用ハニカムフィルターであり、濃度を測定する前記物質は臭気物質であることを特徴とする、請求項1から7のいずれか1項に記載の物理吸着型フィルターの寿命判定方法。 The life determination of the physical adsorption type filter according to any one of claims 1 to 7, wherein the physical adsorption type filter is a deodorizing honeycomb filter, and the substance for measuring the concentration is an odorous substance. Method. 物理吸着型フィルターの上流側に接続されている、標準ガスを収容した標準ガス供給手段と、当該物理吸着型フィルターを通過したガスを採取するガス採取手段と、採取したガスの中の特定の物質の濃度を測定して、前記標準ガスの中の前記物質の濃度と比較して捕集効率を算出する制御手段と、を有し、
前記制御手段は、未使用の物理吸着型フィルターに対して前記標準ガス供給手段から前記標準ガスを連続的に供給させている間に、当該物理吸着型フィルターを通過したガスの採取と、採取したガスの中の特定の物質の濃度の測定と、前記捕集効率の算出とを、間欠的に複数回行って、複数回算出した捕集効率と、前記標準ガスの当該物理吸着型フィルターへの累積供給時間との関係を示す破過曲線を作成するとともに、
前記破過曲線を作成した後に、寿命判定の対象である物理吸着型フィルターに対して前記標準ガス供給手段から前記標準ガスを供給させて、当該物理吸着型フィルターを通過したガスの採取と、採取したガスの中の特定の物質の濃度の測定と、前記捕集効率の算出とを行なって、算出した捕集効率と前記破過曲線とを対比して当該物理吸着型フィルターの寿命を判定することを特徴とする、物理吸着型フィルターの寿命判定装置。
A standard gas supply means containing standard gas, which is connected to the upstream side of the physical adsorption type filter, a gas sampling means for collecting gas that has passed through the physical adsorption type filter, and a specific substance in the collected gas. It has a control means for measuring the concentration of the substance and calculating the collection efficiency in comparison with the concentration of the substance in the standard gas.
The control means collects and collects gas that has passed through the physical adsorption type filter while continuously supplying the standard gas from the standard gas supply means to an unused physical adsorption type filter. The concentration of a specific substance in the gas was measured and the collection efficiency was calculated intermittently multiple times, and the collection efficiency calculated multiple times and the standard gas to the physical adsorption type filter were obtained. In addition to creating a breakthrough curve showing the relationship with the cumulative supply time,
After creating the breakthrough curve, the standard gas is supplied from the standard gas supply means to the physical adsorption type filter that is the target of the life determination, and the gas that has passed through the physical adsorption type filter is collected and collected. The concentration of a specific substance in the gas is measured and the collection efficiency is calculated, and the calculated collection efficiency is compared with the breakthrough curve to determine the life of the physical adsorption type filter. A device for determining the life of a physical adsorption type filter.
互いに向かい合う1対の押さえ板と、前記押さえ板の互いに向かい合う面にそれぞれ設けられている弾性材層と、前記弾性材層および前記押さえ板を貫通する貫通孔と、を有し、1対の前記弾性材層および前記押さえ板は互いに接近したり離れたりするように移動可能である治具をさらに備え、
一方の前記弾性材層および前記押さえ板は前記物理吸着型フィルターの上流側に配置され、前記弾性材層および前記押さえ板の前記貫通孔は前記標準ガス供給手段に接続されており、
他方の前記弾性材層および前記押さえ板は前記物理吸着型フィルターの下流側に配置され、前記弾性材層および前記押さえ板の前記貫通孔は前記ガス採取手段に接続されていることを特徴とする、請求項9に記載の物理吸着型フィルターの寿命判定装置。

It has a pair of holding plates facing each other, an elastic layer provided on the facing surfaces of the holding plates, and a through hole penetrating the elastic layer and the holding plate. The elastic layer and the holding plate are further provided with a jig that can be moved to move closer to or further from each other.
One of the elastic material layer and the holding plate is arranged on the upstream side of the physical adsorption type filter, and the elastic material layer and the through hole of the holding plate are connected to the standard gas supply means.
The other elastic material layer and the holding plate are arranged on the downstream side of the physical adsorption type filter, and the elastic material layer and the through hole of the holding plate are connected to the gas sampling means. The device for determining the life of the physical adsorption type filter according to claim 9.

JP2020092038A 2020-05-27 2020-05-27 Lifespan determination method and lifespan determination device for physical adsorption filters Active JP7440344B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020092038A JP7440344B2 (en) 2020-05-27 2020-05-27 Lifespan determination method and lifespan determination device for physical adsorption filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020092038A JP7440344B2 (en) 2020-05-27 2020-05-27 Lifespan determination method and lifespan determination device for physical adsorption filters

Publications (2)

Publication Number Publication Date
JP2021188949A true JP2021188949A (en) 2021-12-13
JP7440344B2 JP7440344B2 (en) 2024-02-28

Family

ID=78849227

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020092038A Active JP7440344B2 (en) 2020-05-27 2020-05-27 Lifespan determination method and lifespan determination device for physical adsorption filters

Country Status (1)

Country Link
JP (1) JP7440344B2 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2980124B1 (en) 1998-11-26 1999-11-22 日本電気株式会社 Chemical filter and its replacement determination method, and gas purification device
JP2000218158A (en) 1999-01-27 2000-08-08 Unitika Ltd Method for judging residual life of filter for adsorbing organic gas
JP2002214116A (en) 2001-01-23 2002-07-31 Fuji Electric Co Ltd Gas removal rate test method and testing device of chemical filter
WO2009055511A1 (en) 2007-10-22 2009-04-30 Clean Earth Technologies, Llc Method and apparatus for gas filter testing
JP2012103119A (en) 2010-11-10 2012-05-31 Japan Environment Research Co Ltd Removal effect measurement system

Also Published As

Publication number Publication date
JP7440344B2 (en) 2024-02-28

Similar Documents

Publication Publication Date Title
KR101131958B1 (en) Method for measuring concentriation of gas and device for the same
CN104704369A (en) Sensitive and rapid method for detection of low levels of lal-reactive substances
US20190101515A1 (en) Volatile organic compound monitoring system
KR20160024953A (en) Method for verifying correct fuction of sampling equipment
WO2010048196A2 (en) Particulate sampling system and method of reducing oversampling during transients
KR101721607B1 (en) Apparatus for rotating-type analyzing particles in particulate matter and analyzing method using the same
Sanchez et al. Methods and results of characterization of organic emissions from an indoor material
CN108779926A (en) Air purifier and air purification method
Li et al. Field evaluation of particulate matter measurements using tapered element oscillating microbalance in a layer house
EP2937680A1 (en) Method and apparatus for the analysis of materials
CN210665422U (en) Automatic zero calibration device for measuring particulate matters by laser scattering method
Rasmussen et al. Buoyancy-corrected gravimetric analysis of lightly loaded filters
KR20160075394A (en) Simultaneous real-time continuous monitoring system of emission gas concentrations in mutliple chambers
JP2021188949A (en) Method and device for determining life of physical adsorption type filter
Lidén et al. The performance of respirable dust samplers: Sampler bias, precision and inaccuracy
CN107532978A (en) The apparatus and method of detection pollution position, and computer readable recording medium storing program for performing
CN212079823U (en) Breather valve detection device
Groves et al. Prototype instrument employing a microsensor array for the analysis of organic vapors in exhaled breath
CN106596871A (en) Method and device for detecting performance reliability of air quality monitor
CN202888140U (en) Wafer carry tool air filling device capable of monitoring property of air from air outlet end
CN110736691A (en) Concentration correction method of particle sensor by laser scattering method
CN107449875B (en) Malodorous gas detection equipment of organic waste treatment facility
JP2012103119A (en) Removal effect measurement system
CN208860707U (en) A kind of air pollutants detection device
JPH11226341A (en) Method and apparatus for clarification of gas

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20230303

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20231027

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20231121

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20240111

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20240111

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

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20240208

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20240215

R150 Certificate of patent or registration of utility model

Ref document number: 7440344

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150