JP2003135931A - Apparatus for treating exhaust gas from ethylene oxide gas sterilizer - Google Patents
Apparatus for treating exhaust gas from ethylene oxide gas sterilizerInfo
- Publication number
- JP2003135931A JP2003135931A JP2001336051A JP2001336051A JP2003135931A JP 2003135931 A JP2003135931 A JP 2003135931A JP 2001336051 A JP2001336051 A JP 2001336051A JP 2001336051 A JP2001336051 A JP 2001336051A JP 2003135931 A JP2003135931 A JP 2003135931A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- eog
- sterilizer
- ethylene oxide
- discharged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Apparatus For Disinfection Or Sterilisation (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、例えば医療用器具
や衣服、寝具等を酸化エチレンガス(以下、EOGと称
する)を用いて滅菌するためのEOG滅菌器から排出さ
れる有害なEOG含有排ガスを触媒反応により酸化分解
して無害化処理して大気に放出するように構成されてい
る触媒方式のEOG滅菌器用排ガス処理装置に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to harmful EOG-containing exhaust gas discharged from an EOG sterilizer for sterilizing medical instruments, clothes, bedding and the like with ethylene oxide gas (hereinafter referred to as EOG). The present invention relates to a catalyst type exhaust gas treatment device for an EOG sterilizer, which is configured to be oxidatively decomposed by a catalytic reaction to be detoxified and released into the atmosphere.
【0002】[0002]
【従来の技術】EOG滅菌器から排出されるEOG含有
排ガスを無処理のままで大気に放出すると、大気汚染の
要因になり、環境衛生上好ましくない。そこで、EOG
含有排ガスの無害化処理手段として、従来、図4に示す
ように、EOG滅菌器1から排出されるEOG含有排ガ
スに大気から取り入れた空気aを混合させてEOG濃度
を希釈する混合希釈部2と、この混合希釈部2から排出
される排ガス中の残留EOGを触媒反応により酸化分解
して無害化処理する触媒反応部3とを備え、上記EOG
滅菌器1に配管4を介して連通連結してなる触媒方式の
排ガス処理装置5を用いることが一般的に知られてい
る。2. Description of the Related Art If EOG-containing exhaust gas discharged from an EOG sterilizer is released into the atmosphere without being treated, it becomes a factor of air pollution, which is not preferable for environmental hygiene. So EOG
As a conventional means for detoxifying the contained exhaust gas, as shown in FIG. 4, a mixing / diluting unit 2 for diluting the EOG concentration by mixing the EOG-containing exhaust gas discharged from the EOG sterilizer 1 with the air a taken from the atmosphere. And a catalytic reaction unit 3 for detoxifying and treating the residual EOG in the exhaust gas discharged from the mixing and diluting unit 2 by catalytic reaction.
It is generally known to use a catalyst-type exhaust gas treatment device 5 which is connected to the sterilizer 1 via a pipe 4.
【0003】[0003]
【発明が解決しようとする課題】上記した従来一般の触
媒方式の排ガス処理装置5は、EOG滅菌器1から排出
される排ガス中のEOGを触媒反応部3での酸化分解に
よって確実かつ安全に無害化処理できるようにするため
に、触媒反応部3よりも上流側の位置で、排ガスに空気
を混合させてEOG濃度を触媒反応に適した濃度にまで
希釈する必要がある。特に、EOG滅菌器1から最初に
排出される排ガス中のEOG濃度は非常に高く、そのよ
うな高濃度なEOGが触媒反応すると、反応熱が過度に
上昇し、場合によっては爆発等の危険性を伴う可能性が
あり、触媒方式の処理装置5では空気混合による希釈が
必要不可欠である。The conventional general catalyst type exhaust gas treatment apparatus 5 described above reliably and safely harmlessly oxidizes and decomposes EOG in the exhaust gas discharged from the EOG sterilizer 1 in the catalytic reaction section 3. In order to enable the chemical treatment, it is necessary to mix the exhaust gas with air at a position upstream of the catalytic reaction part 3 to dilute the EOG concentration to a concentration suitable for the catalytic reaction. In particular, the EOG concentration in the exhaust gas first discharged from the EOG sterilizer 1 is very high, and when such a high concentration of EOG undergoes a catalytic reaction, the reaction heat rises excessively, and in some cases there is a risk of explosion or the like. Therefore, in the catalytic treatment device 5, dilution by air mixing is indispensable.
【0004】ところで、EOG滅菌器1から排出される
EOG含有排ガス量は相当に多量である。特に、チャン
バー内に収容された被滅菌物の残留EOG濃度を下げる
ためにチャンバー内への清浄空気の導入、及び、排出を
複数回繰り返して空気置換作用を行うエアレーション時
には連続的に多量の排ガスが排出されるのであり、この
ような多量の排ガスを次々と、しかも、短時間で希釈処
理するには混合希釈部2として非常に処理能力の大きな
ものが要求される。また、希釈処理後の多量の排ガスを
触媒反応により所定どおりに酸化分解させるためには単
位時間当たりの処理能力が過大な触媒を用いるか、もし
くは、多量の排ガスを触媒反応に最適な温度にまで予備
加熱することが必要であり、その結果、装置全体が大型
化し設置に大きなスペースを要するとともに、設備コス
トが非常に高くなり、さらに、予備加熱する場合は消費
熱エネルギーが多くランニニングコストも嵩むという問
題があった。By the way, the amount of EOG-containing exhaust gas discharged from the EOG sterilizer 1 is considerably large. In particular, a large amount of exhaust gas is continuously generated during aeration in which clean air is introduced into and discharged from the chamber a plurality of times in order to reduce the residual EOG concentration of the substance to be sterilized and stored in the chamber. In order to dilute such a large amount of exhaust gas one after another and in a short time, the mixing / diluting section 2 having a very large processing capacity is required. In addition, in order to oxidatively decompose a large amount of exhaust gas after dilution treatment as prescribed by a catalytic reaction, use a catalyst with an excessive treatment capacity per unit time, or use a large amount of exhaust gas up to the optimum temperature for catalytic reaction. Preheating is required, and as a result, the entire device becomes large and requires a large space for installation, and the equipment cost is very high. Furthermore, when preheating, the heat consumption energy is large and the running cost is high. There was a problem.
【0005】因みに、触媒反応に適した濃度を1000
0ppmとした場合、EOG滅菌器から最初に排出され
るEOG濃度は、滅菌器チャンバー内を真空にしてEO
Gを導入していることからみて一般的に使用されている
滅菌用EOGボンベ内の濃度、すなわち、20万ppm
〜100万ppmとほぼ同等であり、これを触媒反応に
適した10000ppmの濃度にするためには、20〜
100倍に希釈しなければならない。したがって、滅菌
器チャンバーの容量を100Lとすると、希釈後のEO
G含有排ガスの容積は2000〜10000Lにもな
る。また、この多量のEOG含有排ガスを5分間で処理
するとなると、400〜2000L/分の処理能力が要
求されることになる。また、このような多量のEOG含
有排ガスを触媒反応に最適な温度までプレヒーターで加
熱するとなると、多くの消費熱エネルギーを必要とし、
ランニングコストが膨大になり非常に不経済である。Incidentally, the concentration suitable for the catalytic reaction is 1000
When the concentration is 0 ppm, the EOG concentration first discharged from the EOG sterilizer is EO by evacuating the sterilizer chamber.
The concentration in the EOG cylinder for sterilization that is generally used from the viewpoint of introducing G, that is, 200,000 ppm
˜1 million ppm, which is almost equal to 1,000,000 ppm
It must be diluted 100 times. Therefore, assuming that the volume of the sterilizer chamber is 100 L, the diluted EO
The volume of the G-containing exhaust gas becomes 2000 to 10000L. Further, if this large amount of EOG-containing exhaust gas is treated in 5 minutes, a treatment capacity of 400 to 2000 L / min is required. In addition, when such a large amount of EOG-containing exhaust gas is heated by the preheater to the optimum temperature for the catalytic reaction, a large amount of heat energy is consumed,
The running cost is huge and it is very uneconomical.
【0006】また、EOG滅菌器と排ガス処理装置との
間に通信手段を設けて、排ガス処理装置側の処理能力、
処理速度に合わせてEOG滅菌器側からの排ガスの排出
をコントロールする機能を発揮させることも考えられる
が、そのような通信手段やコントロール機能を持たない
既存のEOG滅菌器には適用することができないし、ま
た、設備投資によって適用したとしても、滅菌から排ガ
ス処理までの一連の作業効率が著しく低下してしまうと
いう問題がある。[0006] Further, a communication means is provided between the EOG sterilizer and the exhaust gas treatment device so that the processing capacity of the exhaust gas treatment device side,
It may be possible to exert the function of controlling the exhaust gas emission from the EOG sterilizer side according to the processing speed, but it cannot be applied to the existing EOG sterilizer without such communication means or control function. Moreover, even if it is applied by capital investment, there is a problem that the efficiency of a series of operations from sterilization to exhaust gas treatment is significantly reduced.
【0007】本発明は上記実情に鑑みてなされたもの
で、既存のEOG滅菌器にも適用可能であるのはもとよ
り、装置全体の小型化、低コスト化を図りながら、高濃
度かつ多量のEOG含有排ガスを短時間のうちに無害化
処理することができるEOG滅菌器用排ガス処理装置を
提供することを目的としている。The present invention has been made in view of the above circumstances, and is applicable not only to existing EOG sterilizers, but also to high-concentration and large-volume EOGs while achieving downsizing and cost reduction of the entire apparatus. An object is to provide an exhaust gas treatment device for an EOG sterilizer, which can detoxify contained exhaust gas in a short time.
【0008】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明に係るEOG滅菌器用排ガス処理装置は、E
OG滅菌器から排出されるEOG含有排ガスに空気を混
合させてEOG濃度を希釈する混合希釈部と、この混合
希釈部から排出される排ガス中の残留EOGを触媒反応
により酸化分解して無害化処理する触媒反応部とを備え
ているEOG滅菌器用排ガス処理装置であって、上混合
希釈部よりも上流側の位置に、EOG滅菌器から排出さ
れるEOG含有排ガスを一時的に貯留し、かつ、その貯
留排ガスを混合希釈部で徐々に希釈しながら排出可能な
タンク及びこのタンク及び混合希釈部を迂回させてEO
G含有排ガスを混合希釈部の下流側の位置に排出可能な
バイパス路が設けられているとともに、上記タンク及び
混合希釈部を経由して排出される希釈済の排ガスを上記
触媒反応部へ導入する第1状態と上記タンク及び混合希
釈部を迂回しバイパス路を経て排出される非希釈の排ガ
スを上記触媒反応部へ直接導入する第2状態とに選択的
に切替制御可能なガス導入路切替制御手段が設けられて
いることを特徴とするものである。In order to achieve the above object, an exhaust gas treatment apparatus for an EOG sterilizer according to the present invention is
A mixing / diluting section for diluting the EOG concentration by mixing air with the EOG-containing exhaust gas discharged from the OG sterilizer, and detoxifying treatment by oxidative decomposition of residual EOG in the exhaust gas discharged from this mixing / diluting section by catalytic reaction. An exhaust gas treatment apparatus for an EOG sterilizer, comprising: a catalytic reaction unit for storing the EOG-containing exhaust gas discharged from the EOG sterilizer at a position upstream of the upper mixing / diluting unit, and A tank that can be discharged while gradually diluting the stored exhaust gas in the mixing and diluting section and an EO that bypasses this tank and the mixing and diluting section
A bypass passage that can discharge the G-containing exhaust gas at a position downstream of the mixing / diluting section is provided, and the diluted exhaust gas discharged through the tank and the mixing / diluting section is introduced into the catalytic reaction section. Gas introduction passage switching control capable of selectively switching control between a first state and a second state in which undiluted exhaust gas bypassing the tank and the mixing / diluting portion and discharged through a bypass passage is directly introduced into the catalytic reaction portion Means are provided.
【0009】上記構成を有する本発明によれば、EOG
滅菌器から最初に排出される高濃度のEOG含有排ガス
を処理するときは、ガス導入路切替制御手段を介してガ
ス導入路を第1状態に切替えることによって、EOG滅
菌器から排出される高濃度のEOG含有排ガスはタンク
に一時的に貯留され混合希釈部で徐々に希釈されながら
触媒反応部に導入され無害化処理される。その後にEO
G滅菌器でのエアレーション(空気置換)により濃度が
低下されたEOG含有排ガスを処理するときは、ガス導
入路切替制御手段を介してガス導入路を第2状態に切替
えることによって、EOG滅菌器から排出される低濃度
のEOG含有排ガスはバイパス路を経てタンク及び混合
希釈部を迂回して触媒反応部に直接導入され無害化処理
される。According to the present invention having the above structure, the EOG
When the high-concentration EOG-containing exhaust gas first discharged from the sterilizer is processed, the high-concentration exhausted from the EOG sterilizer is switched by switching the gas introduction passage to the first state via the gas introduction passage switching control means. The EOG-containing exhaust gas of (1) is temporarily stored in the tank and gradually diluted in the mixing / diluting section while being introduced into the catalytic reaction section for detoxification treatment. Then EO
When processing the EOG-containing exhaust gas whose concentration has been reduced by aeration (air replacement) in the G sterilizer, the EOG sterilizer is switched from the EOG sterilizer by switching the gas introduction passage to the second state via the gas introduction passage switching control means. The discharged low-concentration EOG-containing exhaust gas bypasses the tank and the mixing / diluting section via a bypass path and is directly introduced into the catalytic reaction section for detoxification treatment.
【0010】上述のように、EOG濃度が高い排ガスの
排出初期段階時にのみ時間をかけて希釈しながら触媒反
応処理し、それ以降のEOG濃度が低い排ガスの排出段
階では希釈なしで触媒反応処理することにより、EOG
濃度に関係なく滅菌器から排出されるEOG含有排ガス
の全量を希釈した後、触媒反応する従来の装置に比べ
て、混合希釈部及び触媒の必要処理能力を小さくするこ
とが可能で、装置全体の小型化及び低コスト化が図れ
る。また、多量の希釈済み排ガスを触媒反応に適した温
度まで予備加熱する必要もないので、熱エネルギーの消
費も非常に少なくなり、ランニングコストの低減も図れ
る。さらに、通信手段や滅菌器からの排ガス排出量のコ
ントロール機能を持たない既存のEOG滅菌器にも簡単
に適用することが可能である。As described above, the catalytic reaction treatment is performed while diluting the exhaust gas having a high EOG concentration over a period of time only during the initial discharge stage, and the catalytic reaction treatment is performed without dilution in the subsequent exhaust gas stage having a low EOG concentration. By this, EOG
After diluting the total amount of EOG-containing exhaust gas discharged from the sterilizer regardless of the concentration, it is possible to reduce the required processing capacity of the mixing / diluting section and the catalyst, as compared with the conventional apparatus in which a catalytic reaction is performed. Miniaturization and cost reduction can be achieved. Further, since it is not necessary to preheat a large amount of diluted exhaust gas to a temperature suitable for the catalytic reaction, consumption of heat energy is extremely reduced and running cost can be reduced. Further, it can be easily applied to an existing EOG sterilizer that does not have a communication means or a function of controlling the amount of exhaust gas discharged from the sterilizer.
【0011】上記構成のEOG滅菌器用排ガス処理装置
におけるガス導入路切替制御手段としては、請求項2に
記載のように、滅菌器からEOG含有排ガスが排出され
る時で、少なくとも最初の排出開始時から所定時間経過
するまでは第1状態に切替えられ、その後は第2状態と
第1状態とが所定回数に亘り交互に切替制御されるよう
に構成されたものであっても、請求項3に記載のよう
に、滅菌器からEOG含有排ガスが排出される時で、少
なくとも最初の排出開始時から所定時間経過するまでは
第1状態に切替えられ、その後は第2状態と第1状態と
の並行状態に切替制御されるように構成されたものであ
ってもよく、いずれにしても、滅菌器から高濃度のEO
G含有排ガスが最初に排出開始される時から所定時間経
過するまではタンクに一時貯留させて混合希釈部で徐々
に希釈しながら触媒反応部に導入することで、処理能力
の小さい触媒反応部を用いながらも、適切な酸化分解作
用を発揮させて所定どおりの無害化処理を確実に行うこ
とができる。The gas introduction path switching control means in the exhaust gas treatment apparatus for an EOG sterilizer having the above-mentioned structure is characterized in that, as described in claim 2, when the EOG-containing exhaust gas is discharged from the sterilizer, at least at the first discharge start time. Even if it is configured such that it is switched to the first state until a predetermined time elapses from then on, and then the second state and the first state are alternately switched over a predetermined number of times. As described above, when the EOG-containing exhaust gas is discharged from the sterilizer, it is switched to the first state at least until a predetermined time has elapsed from the start of the first discharge, and thereafter, the second state and the first state are in parallel. It may be configured to be controlled to be switched to a state, and in any case, the sterilizer can remove high-concentration EO.
From the time when the G-containing exhaust gas is first discharged, until a predetermined time elapses, it is temporarily stored in the tank and gradually introduced into the catalytic reaction part while being diluted by the mixing / diluting part, so that the catalytic reaction part having a small processing capacity can be obtained. Even if it is used, it is possible to surely perform the detoxification treatment as desired by exerting an appropriate oxidative decomposition action.
【0012】[0012]
【発明の実施の形態】以下、本発明の実施の形態を図面
にもとづいて説明する。図1は本発明に係るEOG滅菌
器用排ガス処理装置の概略構成図であり、このEOG滅
菌器用排ガス処理装置5は、EOG滅菌器1から配管4
を通して排出されるEOG含有排ガスに大気から取り入
れた空気aを混合させてEOG濃度を希釈する混合希釈
部2と、この混合希釈部2から排出される排ガス中の残
留EOGを触媒反応により酸化分解して無害化処理する
触媒反応部3とを備えており、これらは図4に示す従来
の触媒方式の排ガス処理装置と同一の基本構成である。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of an exhaust gas treatment apparatus for an EOG sterilizer according to the present invention. This exhaust gas treatment apparatus 5 for an EOG sterilizer includes an EOG sterilizer 1 to a pipe 4
Through mixing the air a introduced from the atmosphere with the exhaust gas containing EOG exhausted through the mixing and diluting section 2 and the residual EOG in the exhaust gas discharged from the mixing and diluting section 2 is oxidatively decomposed by a catalytic reaction. And a catalytic reaction unit 3 for detoxifying treatment, which has the same basic configuration as the conventional catalytic exhaust gas treatment apparatus shown in FIG.
【0013】上記のような基本構成を備えた排ガス処理
装置5において、上記混合希釈部2よりも上流側の位置
には、EOG滅菌器1から排出されるEOG含有排ガス
を一時的に貯留し、かつ、その貯留排ガスを混合希釈部
2に少量毎に供給して徐々に希釈しながら下流側に排出
可能なタンク6が設けられているとともに、このタンク
6及び混合希釈部2を通過して排出される希釈済の排ガ
スを触媒反応部3に導入可能な導管7が設けられてい
る。また、EOG滅菌器1から排出されるEOG含有排
ガスを上記一時貯留用タンク6及び混合希釈部2を迂回
させて混合希釈部2よりも下流側に排出可能なバイパス
配管(バイパス路)8が配管4と導管7の途中部分間に
亘って連結されている。In the exhaust gas treating apparatus 5 having the above-mentioned basic structure, the EOG-containing exhaust gas discharged from the EOG sterilizer 1 is temporarily stored at a position upstream of the mixing / diluting section 2. Further, the stored exhaust gas is supplied to the mixing and diluting unit 2 in small amounts, and a tank 6 capable of discharging while gradually diluting is provided at the same time, and is discharged through the tank 6 and the mixing and diluting unit 2. A conduit 7 that can introduce the diluted exhaust gas into the catalytic reaction unit 3 is provided. Further, a bypass pipe (bypass passage) 8 that can bypass the EOG-containing exhaust gas discharged from the EOG sterilizer 1 to the temporary storage tank 6 and the mixing / diluting unit 2 and discharge it to the downstream side of the mixing / diluting unit 2 is a pipe. 4 and the conduit 7 are connected to each other in the middle thereof.
【0014】上記バイパス配管8と配管4との分岐部、
バイパス配管8の途中部分及び導管7の上流端部にはそ
れぞれ電磁弁9,10,11が介在されており、これら
電磁弁9,10,11の開閉を制御することにより、E
OG滅菌器1から排出されるEOG含有排ガスが上記タ
ンク6及び混合希釈部2を経由して徐々に希釈され、そ
の希釈済の排ガスが導管7を通じて触媒反応部3へ導入
される第1状態と、EOG滅菌器1から排出されるEO
G含有排ガスが上記タンク6及び混合希釈部2を迂回し
バイパス配管8を経て排出され、その非希釈排ガスが導
管7を通じて触媒反応部3へ直接導入される第2状態と
に選択的に切替制御可能なコントローラ12(ガス導入
路切替制御手段)が設けられている。A branch portion between the bypass pipe 8 and the pipe 4,
Solenoid valves 9, 10, 11 are respectively interposed in the middle portion of the bypass pipe 8 and the upstream end portion of the conduit 7. By controlling the opening and closing of these solenoid valves 9, 10, 11, E
The EOG-containing exhaust gas discharged from the OG sterilizer 1 is gradually diluted via the tank 6 and the mixing / diluting unit 2, and the diluted exhaust gas is introduced into the catalytic reaction unit 3 through the conduit 7. , EO discharged from EOG sterilizer 1
The G-containing exhaust gas bypasses the tank 6 and the mixing / diluting section 2 and is discharged through the bypass pipe 8, and the undiluted exhaust gas is selectively switched to the second state in which it is directly introduced into the catalytic reaction section 3 through the conduit 7. A possible controller 12 (gas introduction path switching control means) is provided.
【0015】上記コントローラ12は、図2のタイミン
グチャートで示すように、EOG滅菌器1から最初にE
OG含有排ガスが排出開始された時点では電磁弁9,1
1を開、電磁弁10を閉にするとともに、排出開始時点
から所定時間T1が経過した時点で電磁弁9を閉に、さ
らに、排出開始から所定時間T2(>T1)が経過した
時点で電磁弁11を閉とする上記の第1状態に切替えら
れ、その後は電磁弁9を閉のままで電磁弁10と11と
を所定回数交互に開閉させて上記の第2状態と第1状態
とを繰り返し切替制御するような動作シーケンスにプロ
グラム設定されている。As shown in the timing chart of FIG. 2, the controller 12 starts from the EOG sterilizer 1 to the E first.
Solenoid valves 9 and 1 at the time when the exhaust gas containing OG is started.
1 is opened, the solenoid valve 10 is closed, the solenoid valve 9 is closed when a predetermined time T1 has elapsed from the start of discharging, and the solenoid is closed when a predetermined time T2 (> T1) has elapsed from the start of discharging. The valve 11 is switched to the first state in which the valve 11 is closed, and thereafter, the electromagnetic valve 9 is kept closed and the electromagnetic valves 10 and 11 are alternately opened and closed a predetermined number of times to switch between the second state and the first state. The program is set to an operation sequence for repeatedly switching control.
【0016】なお、上記EOG滅菌器1は、チャンバー
内に被滅菌物を収容した上で内部を真空状態にした後、
EOGを導入して一定時間暴露して滅菌する滅菌工程
と、滅菌工程終了後に真空ポンプまたは真空発生器によ
りチャンバー内のEOGを外部へ排出して一定圧力まで
減圧した後、大気よりフィルターを通して新鮮な空気を
チャンバー内に導入して空気置換を行い、しかる後、チ
ャンバー内の残留EOG含有排ガスを外部へ排出し、再
度新鮮空気の導入による空気置換を行った後、排ガスを
再び外部へ排出することを複数回繰り返すことにより残
留EOG濃度を段階的に低下させるエアレーション工程
とを有するものであって、その具体的な構成は周知であ
るため、構成の説明及び図示は省略する。なお、エアレ
ーションの一回当たりの所要時間Ta(図2参照)は3
〜7分が一般的である。In the EOG sterilizer 1, after the object to be sterilized is housed in the chamber and the inside is evacuated,
A sterilization process in which EOG is introduced and exposed for a certain period of time to sterilize, and after the sterilization process is completed, the EOG in the chamber is discharged to the outside by a vacuum pump or a vacuum generator to reduce the pressure to a certain pressure, and then fresh from the atmosphere through a filter. Introducing air into the chamber to perform air replacement, and then discharging the residual exhaust gas containing EOG in the chamber to the outside, again performing air replacement by introducing fresh air, and then discharging the exhaust gas to the outside again. And an aeration process for gradually reducing the residual EOG concentration by repeating the above procedure a plurality of times. Since the specific configuration thereof is well known, the description and illustration of the configuration will be omitted. The required time Ta (see FIG. 2) per aeration is 3
~ 7 minutes is typical.
【0017】上記のように構成されたEOG滅菌器用排
ガス処理装置5によれば、EOG滅菌器1でのエアレー
ション作用に伴い最初に高濃度のEOG含有排ガスが排
出されるときは、コントローラ12を介して電磁弁9,
11が開、電磁弁10が閉となる第1状態に切替えられ
ており、これによって、EOG滅菌器1から排出される
高濃度のEOG含有排ガスはタンク6に一時的に貯留さ
れたのち、混合希釈部2で時間をかけて徐々に希釈され
ながら、所定時間T2に亘り触媒反応部3に導入されて
無害化処理される。その後は、コントローラ12を介し
て電磁弁9が閉のままで電磁弁10と11とが所定回数
(エアレーション作用回数)に亘り交互に開閉されて第
2状態と第1状態とが繰り返し切替制御されることにな
り、これによって、EOG滅菌器1でのエアレーション
(空気置換)により濃度低下された低濃度のEOG含有
排ガスまたは混合希釈部2で希釈された低濃度のEOG
含有排ガスが交互に触媒反応部3に導入されて無害化処
理される。According to the exhaust gas treatment apparatus 5 for an EOG sterilizer constructed as described above, when the high concentration EOG-containing exhaust gas is first discharged due to the aeration action in the EOG sterilizer 1, the controller 12 is operated. Solenoid valve 9,
11 has been opened and the solenoid valve 10 has been switched to the first state in which it is closed, whereby the high-concentration EOG-containing exhaust gas discharged from the EOG sterilizer 1 is temporarily stored in the tank 6 and then mixed. While being gradually diluted in the dilution section 2 over a period of time, it is introduced into the catalytic reaction section 3 for a predetermined time T2 to be detoxified. After that, the solenoid valve 9 remains closed via the controller 12, and the solenoid valves 10 and 11 are alternately opened and closed a predetermined number of times (the number of times of aeration) to repeatedly switch between the second state and the first state. As a result, a low-concentration EOG-containing exhaust gas whose concentration has been reduced by aeration (air substitution) in the EOG sterilizer 1 or a low-concentration EOG diluted by the mixing / diluting section 2 is obtained.
The contained exhaust gas is alternately introduced into the catalytic reaction section 3 and is detoxified.
【0018】上述のように、EOG濃度が高い排ガスの
排出初期段階時にのみ時間をかけて希釈しながら触媒反
応処理し、それ以降のEOG濃度が低い排ガスの排出段
階では希釈なしで触媒反応処理することにより、EOG
含有排ガスの全量を希釈して触媒反応させる場合に比べ
て、混合希釈部2及び触媒反応部3の必要処理能力が小
さくてすみ、装置全体の小型化及び低コスト化が図れ
る。また、多量の希釈済み排ガスを触媒反応に適した温
度まで予備加熱する必要もないので、熱エネルギーの消
費も非常に少なく、ランニングコストの低減も図れる。As described above, the catalytic reaction treatment is performed while diluting the exhaust gas having a high EOG concentration over a period of time only during the initial discharge stage, and the catalytic reaction treatment is performed without dilution in the subsequent exhaust gas stage having a low EOG concentration. By this, EOG
Compared with the case where the total amount of the exhaust gas contained is diluted to carry out a catalytic reaction, the required processing capacity of the mixing and diluting section 2 and the catalytic reaction section 3 can be small, and the overall size and cost of the apparatus can be reduced. Further, since it is not necessary to preheat a large amount of diluted exhaust gas to a temperature suitable for the catalytic reaction, consumption of thermal energy is very small and running cost can be reduced.
【0019】なお、上記実施の形態では、最初(1回
目)に排出される高濃度のEOG含有排ガスを時間をか
けて希釈しながら触媒反応処理し、それ以降、つまり、
2回目以降は混合希釈部2から排出される低濃度のEO
G含有排ガスと非希釈(希釈なし)の低濃度のEOG含
有排ガスとを交互に触媒反応部3に導入するような動作
シーケンスにプログラム設定したコントローラ12を用
いたが、図3のタイミングチャートで示すように、2回
目以降は混合希釈部2から排出される低濃度のEOG含
有排ガスと非希釈(希釈なし)の低濃度のEOG含有排
ガスとを同時並行して触媒反応部3に導入するような動
作シーケンスにプログラム設定したコントローラを用い
てもよい。In the above embodiment, the high-concentration EOG-containing exhaust gas discharged first (first time) is subjected to a catalytic reaction treatment while being diluted over time, and thereafter, that is,
From the second time onward, low-concentration EO discharged from the mixing and diluting unit 2
The controller 12 programmed to operate in such a manner that the G-containing exhaust gas and the undiluted (non-diluted) low-concentration EOG-containing exhaust gas are alternately introduced into the catalytic reaction unit 3 was used. As described above, after the second time, the low-concentration EOG-containing exhaust gas discharged from the mixing / diluting unit 2 and the undiluted (non-diluted) low-concentration EOG-containing exhaust gas are simultaneously introduced into the catalytic reaction unit 3. A controller programmed in the operation sequence may be used.
【0020】また、上記した一時貯留用タンク6内にE
OG含有排ガスを一時的に吸着保持可能な物質を挿入し
ておくことにより、タンク容量の小型化も図れる。In the temporary storage tank 6 mentioned above, E
By inserting a substance capable of temporarily adsorbing and holding the OG-containing exhaust gas, the tank capacity can be reduced.
【0021】[0021]
【発明の効果】以上要するに、本発明によれば、EOG
濃度が高い排ガスの排出初期段階時には時間をかけて希
釈しながら触媒反応処理し、それ以降でEOG濃度が低
い排ガスの排出段階以降は希釈なしで触媒反応処理する
ことにより、滅菌器から排出されるEOG含有排ガスの
全量を希釈した上で触媒反応するように構成されている
従来の装置に比べて、混合希釈部及び触媒の必要処理能
力を小さくすることができて、装置全体の小型化及び低
コスト化並びに処理時間の短縮化を図ることができる。
しかも、多量の希釈済み排ガスを触媒反応に適した温度
まで予備加熱する必要もないので、熱エネルギーの消費
も非常に少なく、ランニングコストの低減も図ることが
できる。また、通信手段や滅菌器からの排ガス排出量の
コントロール機能を持たない既存のEOG滅菌器にも簡
単に適用することができるという効果を奏する。In summary, according to the present invention, the EOG is
Exhaust gas with a high concentration is discharged from the sterilizer by performing a catalytic reaction treatment while diluting over time in the initial stage of discharge, and then performing a catalytic reaction process without dilution after the exhaust gas stage with a low EOG concentration. Compared to a conventional device configured to dilute the total amount of EOG-containing exhaust gas and then to carry out a catalytic reaction, the required processing capacity of the mixing and diluting section and the catalyst can be made smaller, and the overall size and size of the device can be reduced. Cost and processing time can be shortened.
Moreover, since it is not necessary to preheat a large amount of diluted exhaust gas to a temperature suitable for the catalytic reaction, consumption of thermal energy is very small and running cost can be reduced. Further, there is an effect that it can be easily applied to an existing EOG sterilizer which does not have a function of controlling the amount of exhaust gas discharged from the communication means or the sterilizer.
【図1】本発明に係るEOG滅菌器用排ガス処理装置の
概略構成図である。FIG. 1 is a schematic configuration diagram of an exhaust gas treating apparatus for an EOG sterilizer according to the present invention.
【図2】同装置におけるコントローラにプログラム設定
されているタイミングチャートの一例である。FIG. 2 is an example of a timing chart programmed in a controller of the apparatus.
【図3】同装置におけるコントローラにプログラム設定
されているタイミングチャートの他の一例である。FIG. 3 is another example of a timing chart in which a controller is programmed in the same apparatus.
【図4】従来のEOG滅菌器用排ガス処理装置の概略構
成図である。FIG. 4 is a schematic configuration diagram of a conventional exhaust gas treatment device for an EOG sterilizer.
1 EOG滅菌器 2 混合希釈部 3 触媒反応部 5 排ガス処理装置 6 一時貯留用タンク 8 バイパス配管(バイパス路) 9,10,11 電磁弁 12 コントローラ(ガス導入路切替制御手段) 1 EOG sterilizer 2 mixed dilution section 3 Catalytic reaction part 5 Exhaust gas treatment equipment 6 Temporary storage tank 8 Bypass piping (bypass path) 9, 10, 11 solenoid valve 12 controller (gas introduction path switching control means)
Claims (3)
酸化エチレンガス含有排ガスに空気を混合させて酸化エ
チレンガス濃度を希釈する混合希釈部と、この混合希釈
部から排出される排ガス中の残留酸化エチレンガスを触
媒反応により酸化分解して無害化処理する触媒反応部と
を備えている酸化エチレンガス滅菌器用排ガス処理装置
であって、 上混合希釈部よりも上流側の位置に、酸化エチレンガス
滅菌器から排出される酸化エチレンガス含有排ガスを一
時的に貯留し、かつ、その貯留排ガスを混合希釈部で徐
々に希釈しながら排出可能なタンク及びこのタンク及び
混合希釈部を迂回させて酸化エチレンガス含有排ガスを
混合希釈部の下流側の位置に排出可能なバイパス路が設
けられているとともに、 上記タンク及び混合希釈部を経由して排出される希釈済
の排ガスを上記触媒反応部へ導入する第1状態と上記タ
ンク及び混合希釈部を迂回しバイパス路を経て排出され
る非希釈の排ガスを上記触媒反応部へ直接導入する第2
状態とに選択的に切替制御可能なガス導入路切替制御手
段が設けられていることを特徴とする酸化エチレンガス
滅菌器用排ガス処理装置。1. A mixing / diluting unit for diluting the ethylene oxide gas concentration by mixing air with the exhaust gas containing ethylene oxide gas discharged from an ethylene oxide gas sterilizer, and residual oxidation in the exhaust gas discharged from this mixing / diluting unit. An exhaust gas treatment device for an ethylene oxide gas sterilizer, which comprises a catalytic reaction unit that oxidatively decomposes and detoxifies ethylene gas by a catalytic reaction, and ethylene oxide gas sterilization is performed at a position upstream of the upper mixing dilution unit. Tank for temporarily storing the exhaust gas containing ethylene oxide gas discharged from the reactor, and for discharging the stored exhaust gas while gradually diluting the stored exhaust gas and ethylene oxide gas bypassing this tank and the mixed dilution section There is a bypass path that allows exhaust gas to be discharged to a position downstream of the mixing and diluting section, and also via the tank and mixing and diluting section. Second introducing the undiluted exhaust gas and the diluted exhaust gas is discharged through the bypass passage bypassing the first state and the tank and mixed and diluted part to be introduced into the catalyst reaction section issued directly to the catalytic reaction section
An exhaust gas treatment apparatus for an ethylene oxide gas sterilizer, characterized in that a gas introduction passage switching control means capable of selectively switching control between the state and the state is provided.
から酸化エチレンガス含有排ガスが排出される時で、少
なくとも最初の排出開始時から所定時間経過するまでは
第1状態に切替えられ、その後は第2状態と第1状態と
が所定回数に亘り交互に切替制御されるように構成され
ている請求項1に記載の酸化エチレンガス滅菌器用排ガ
ス処理装置。2. The gas introduction path switching control means is switched to the first state when the exhaust gas containing ethylene oxide gas is discharged from the sterilizer, at least until a predetermined time has elapsed from the start of the first discharge, and thereafter. The exhaust gas treatment apparatus for an ethylene oxide gas sterilizer according to claim 1, wherein the second state and the first state are configured to be alternately switched and controlled for a predetermined number of times.
から酸化エチレンガス含有排ガスが排出される時で、少
なくとも最初の排出開始時から所定時間経過するまでは
第1状態に切替えられ、その後は第2状態と第1状態と
の並行状態に切替制御されるように構成されている請求
項1に記載の酸化エチレンガス滅菌器用排ガス処理装
置。3. The gas introduction path switching control means is switched to the first state at the time when the exhaust gas containing ethylene oxide gas is discharged from the sterilizer, at least until a predetermined time has elapsed from the start of the first discharge, and thereafter. The exhaust gas treatment device for an ethylene oxide gas sterilizer according to claim 1, wherein the exhaust gas treatment device is configured to be switched and controlled in a parallel state of the second state and the first state.
Priority Applications (1)
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---|---|---|---|
JP2001336051A JP4038358B2 (en) | 2001-11-01 | 2001-11-01 | Exhaust gas treatment equipment for ethylene oxide gas sterilizer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001336051A JP4038358B2 (en) | 2001-11-01 | 2001-11-01 | Exhaust gas treatment equipment for ethylene oxide gas sterilizer |
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JP2003135931A true JP2003135931A (en) | 2003-05-13 |
JP4038358B2 JP4038358B2 (en) | 2008-01-23 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013223811A (en) * | 2013-08-08 | 2013-10-31 | Panasonic Healthcare Co Ltd | Isolator |
CN116351214A (en) * | 2023-03-14 | 2023-06-30 | 山东海美侬环保科技有限公司 | Waste gas pretreatment system and method |
-
2001
- 2001-11-01 JP JP2001336051A patent/JP4038358B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013223811A (en) * | 2013-08-08 | 2013-10-31 | Panasonic Healthcare Co Ltd | Isolator |
CN116351214A (en) * | 2023-03-14 | 2023-06-30 | 山东海美侬环保科技有限公司 | Waste gas pretreatment system and method |
CN116351214B (en) * | 2023-03-14 | 2024-05-17 | 山东海美侬环保科技有限公司 | Waste gas pretreatment system and method |
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