JP3553298B2 - Waste ozone treatment equipment - Google Patents

Waste ozone treatment equipment Download PDF

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JP3553298B2
JP3553298B2 JP30938396A JP30938396A JP3553298B2 JP 3553298 B2 JP3553298 B2 JP 3553298B2 JP 30938396 A JP30938396 A JP 30938396A JP 30938396 A JP30938396 A JP 30938396A JP 3553298 B2 JP3553298 B2 JP 3553298B2
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temperature
catalyst
heating
ozone
heater
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JPH10146518A (en
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慎吾 峯
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Description

【０００１】
【発明の属する技術分野】
この発明は、オゾン分解溶媒を用いて排オゾンを分解する排オゾン処理装置に関するものである。
【０００２】
【従来の技術】
オゾンは強力な酸化力を持ち且つ無公害なため、水処理分野等で広く使用されている。供給オゾンの大半は、原水との接触反応により消費されるが、消費しきれない余剰オゾン（以下、排オゾンと称す）は、人体に有害であることから、排オゾン処理装置により酸素に分解し、オゾン濃度を０．０１ｐｐｍ以下に下げて、大気中に放出している。
【０００３】
図６は従来の排オゾン処理装置を示す構成図であり、図において、１は排オゾン処理装置の被処理ガスであるオゾン化ガス（排オゾン）、２は排オゾン処理装置により処理された酸素ガスである。３はオゾン化ガス１を酸素ガス２に分解する触媒、４はオゾン分解能力を促進するためオゾン化ガス１を加熱するヒータ、５はオゾン化ガス１の温度を監視する温度センサである。６は排オゾン処理装置を構成する容器（以下、オゾン分解塔と称す）であり、このオゾン分解塔６に上記触媒３、ヒータ４及び温度センサ５が収納されている。７はヒータ４へ給電する商用電源、８はヒータ４の電源回路を入切する電磁接触器の接点である。９は温度センサ５により得られた検出温度に基づき、上記電磁接触器の接点８を入切する制御を行う制御器である。１０はオゾン化ガス１が入るオゾン分解塔６の入口、１１は処理後の酸素ガス２が排出されるオゾン分解塔６の出口である。
【０００４】
次に動作について説明する。
オゾン化ガス１は、オゾン分解塔６の入口１０よりオゾン分解塔６へ入り、ヒータ４で加熱され、オゾン分解塔６内に収納されている触媒３により酸素ガス２に分解され、オゾン分解塔６の出口１１より酸素ガス２がオゾン分解塔６から排出される。
加熱されたオゾン化ガス１によって触媒３が加熱され、触媒３のオゾン分解性能が向上する。
オゾン化ガス１の温度は、制御器９で温度センサ５により検出された検出温度と予め設定された設定温度とを比較し、電磁接触器の接点８を入切することにより調節される。
【０００５】
尚、特開平４−３７１２１５号公報に上記した従来の技術に類似した技術が開示されている。
【０００６】
【発明が解決しようとする課題】
従来の排オゾン処理装置は以上のように構成されているので、被処理ガスの温度調節のために電磁接触器の接点を入切するため、ヒータの容量が大容量の場合、電磁接触器の接点開放時のアークにより接点が磨耗するなどの課題があった。
また、ヒータの入切によるストレスのため、ヒータの断線等が生じるなどの課題があった。
さらに、触媒の加熱に時間がかかるため、オゾン処理装置の立ち上がり時に時間を要するなどの課題があった。
【０００７】
この発明は上記のような課題を解決するためになされたもので、電磁接触器の接点の磨耗やヒータの断線等が生じるのを防止し、また装置の立ち上がり時間を削減した排オゾン処理装置を得ることを目的とする。
【０００９】
【課題を解決するための手段】
請求項１記載の発明に係る排オゾン処理装置は、排オゾンを加熱する加熱手段と、加熱された上記排オゾンを酸素に分解する触媒と、上記排オゾンの温度を検出する第１の検出手段と、上記触媒の温度を検出する第２の検出手段と、上記第１の検出手段と上記第２の検出手段の検出信号を切り替える切替手段と、上記加熱手段への供給電力を制御する、半導体素子で構成された電力制御手段と、上記触媒が設定温度に達した時に上記第１の検出手段の検出信号から上記第２の検出手段の検出信号に上記切替手段を切り替えさせ、上記第１の検出手段又は上記第２の検出手段により検出された温度に基づいて上記電力制御手段を制御する制御手段とを備えたものである。
【００１０】
請求項２記載の発明に係る排オゾン処理装置は、排オゾン流入前から加熱手段により大気を加熱するようにしたものである。
【００１１】
【発明の実施の形態】
以下、この発明の実施の一形態及び参考例を説明する。
参考例．
図１はこの発明の参考例による排オゾン処理装置を示す構成図であり、図において、１は排オゾン処理装置の被処理ガスであるオゾン化ガス（排オゾン）、２は排オゾン処理装置により処理された酸素ガス（酸素）である。３はオゾン化ガス１を酸素ガス２に分解する触媒、４はオゾン分解能力を促進するため、オゾン化ガス１を加熱するヒータ（加熱手段）、５はオゾン化ガス１の温度を監視する温度センサ（検出手段）である。６は排オゾン処理装置を構成する容器（以下、オゾン分解塔と称す）であり、このオゾン分解塔６に上記触媒３、ヒータ４及び温度センサ５が収納されている。７はヒータ４へ給電する商用電源である。
【００１２】
１２はヒータ４への電源電圧を可変するサイリスタレギュレータ（電力制御手段）であり、このサイリスタレギュレータ１２は半導体素子であるサイリスタにより構成されている。１３は温度センサ５により得られた検出温度に基づき、サイリスタレギュレータ１２の位相制御を行う制御器（制御手段）である。
１０はオゾン化ガス１が入るオゾン分解塔６の入口、１１は処理後の酸素ガス２が排出されるオゾン分解塔６の出口である。
【００１３】
次に動作について説明する。
先ず、排オゾン処理装置のオゾン処理動作を説明する。オゾン化ガス１は、オゾン分解塔６の入口１０よりオゾン分解塔６へ入り、ヒータ４で加熱され、オゾン分解塔６内に収納されている触媒３により酸素ガス２に分解され、オゾン分解塔６の出口１１より酸素ガス２がオゾン分解塔６から排出される。ここで、オゾン化ガス１が加熱されるのは、加熱されたオゾン化ガス１によって触媒３が加熱され、触媒３のオゾン分解性能を向上させるためである。従って、最適な触媒３のオゾン分解性能を得るため、オゾン化ガス１の温度を設定温度に保つ必要があり、この排オゾン処理装置では制御器１３によってサイリスタレギュレータ１２を制御することにより行っている。
【００１４】
次に、オゾン化ガス１の温度を調節するシーケンス動作を説明する。図２はこの発明の参考例による排オゾン処理装置の動作シーケンスを示すタイムチャートであり、図において、（ａ）は加熱前のオゾン化ガス温度、（ｂ）はヒータへの印加電圧、（ｃ）はヒータの消費電力、（ｄ）は加熱後のオゾン化ガス温度を示す。
【００１５】
上述したように、最適な触媒３のオゾン分解性能を得るためにオゾン化ガス１の温度を設定温度に保つ必要がある。しかし、種々の原因（例えば、冬場に気温が下がること）により、オゾン分解塔６の入口１０から入る加熱前のオゾン化ガス１の温度が上下した場合、ヒータ４による加熱が一定であると、加熱後のオゾン化ガス１の温度も上下することになり、オゾン化ガス１の温度を設定温度に保てなくなる。そこで、加熱前のオゾン化ガス１の温度が上昇するに伴って加熱後のオゾン化ガス１の温度が上昇したことを温度センサ５が検出した場合は、ヒータ４への印加電圧が小さくなるように、制御器１３によってサイリスタレギュレータ１２を位相制御する。ヒータ４への印加電圧が小さくなるに比例して該ヒータ４の消費電力も減少する。これとは逆に、加熱前のオゾン化ガス１の温度が下降するに伴って加熱後のオゾン化ガス１の温度が下降したことを温度センサ５が検出した場合は、ヒータ４への印加電圧が大きくなるように制御器１３によってサイリスタレギュレータ１２を位相制御する。ヒータ４への印加電圧が大きくなるに比例して該ヒータ４の消費電力も増加する。このような動作により、常に加熱後のオゾン化ガス１の温度は設定温度に保たれる。
尚、以上は加熱後のオゾン化ガス１の温度を温度センサ５により検出しているが、加熱前のオゾン化ガス１の温度を温度センサ５により検出しても、同様に加熱後のオゾン化ガス１の温度を設定温度に保つことができる。
【００１６】
以上のように、この参考例によれば、サイリスタレギュレータ１２によりヒータ４への印加電圧を可変しているので、加熱前のオゾン化ガス１の温度変化に対し、ヒータ４に過度の負担（ストレス）をかけることなく設定温度を安定して保つことができる。
また、従来の電磁接触器を使用する場合は商用電源７の電圧変動に比例してヒータ４の消費電力が増減するが、サイリスタレギュレータ１２ではそのようなヒータ４の消費電力の増減を抑えることができるので、商用電源７の電圧変動に対しても、設定温度を安定して保つことができる。
さらに、サイリスタレギュレータ１２が半導体素子で構成されているので、電磁接触器等を使用した場合に発生するアークによる接点の磨耗を防止することができる。
【００１７】
実施の形態１．
上記参考例では、温度センサ５によりオゾン化ガス１の温度を検出し、その検出温度に基づいてヒータ４の印加電圧を制御し、加熱後のオゾン化ガス１の温度を設定温度に保つ場合について述べたが、触媒３は加熱されると自己発熱するため、加熱後のオゾン化ガス１を設定温度に保つだけでなく、触媒３の温度を設定温度に保つ必要がある。従って、この実施の形態２による排オゾン処理装置は、触媒３の温度を設定温度に保つことができるように構成したものである。
図３はこの発明の実施の形態１による排オゾン処理装置を示す構成図であり、図において、５ａは温度センサ（第１の検出手段）５とは別に設けられた、触媒３の温度を検出する温度センサ（第２の検出手段）、１４は温度センサ５と温度センサ５ａの検出信号を切り替えるための切替スイッチ（切替手段）である。１５は切替スイッチ１４を切り替えさせ、また温度センサ５又は温度センサ５ａにより得られた検出温度に基づき、サイリスタレギュレータ１２の位相制御を行う制御器（制御手段）である。尚、図１と同一又は相当する部分には同一符号を付し重複説明を省略する。
【００１８】
次に動作について説明する。
排オゾン処理装置のオゾン処理動作については上記参考例と同様であるのでその説明を省略し、触媒３の温度を調節するシーケンス動作を説明する。図４はこの発明の実施の形態１による排オゾン処理装置の動作シーケンスを示すタイムチャートであり、図において、（ａ）は触媒の温度、（ｂ）は温度検出点、（ｃ）はヒータの消費電力、（ｄ）は加熱前のオゾン化ガス温度、（ｅ）は加熱後のオゾン化ガス温度を示す。
【００１９】
オゾン分解塔６の入口１０から入ったオゾン化ガス１がヒータ４により加熱され、この加熱されたオゾン化ガス１によって触媒３が加熱され、徐々に温度が上昇する。この間、切替スイッチ１４は温度センサ５側に切り替えられており、上記参考例と同様に、加熱後のオゾン化ガス１の温度を検出しているので、加熱前のオゾン化ガス１の温度が上下しても、オゾン化ガス１の温度を設定温度に保つことができる。そして、触媒３の温度が触媒３の設定温度まで上昇した時点（ｔ1 ）で、温度センサ５ａにより触媒３の温度を検出するように、制御器１５は温度センサ５ａ側に切替スイッチ１４を切り替えさせる。触媒３が加熱されたことにより自己発熱して触媒３の温度が上昇した場合、ヒータ４への印加電圧が小さくなるように制御器１５によってサイリスタレギュレータ１２を制御する。このような触媒３が加温されたことによる自己発熱分も含めた温度制御を行うことにより、触媒３の温度を設定温度に保つと共に、ヒータ４への消費電力も低減する。
【００２０】
以上のように、この実施の形態１によれば、触媒３が設定温度に達した時点で制御器１５が切替スイッチ１４を温度センサ５ａ側に切り替えて、触媒３の温度を検出するように構成したので、触媒３の自己発熱により触媒３が設定温度より過熱することを抑制することができると共に、ヒータ４への供給電力も抑制することができる。
【００２１】
実施の形態２．
図５はこの発明の実施の形態２による排オゾン処理装置の動作シーケンスを示すタイムチャートであり、（Ａ）は触媒３の加熱に時間を要する動作シーケンスを示すタイムチャート、（Ｂ）は触媒３の加熱に時間を要しない動作シーケンスを示すタイムチャートである。また図５（Ａ）および（Ｂ）において、（ａ）は排オゾン処理装置の運転状態、（ｂ）はヒータへの印加電圧、（ｃ）は触媒の温度を示す。
【００２２】
上記参考例及び実施の形態１では、図５（Ａ）に示すように、ヒータ４の加熱開始直後は、オゾン化ガス１が設定温度に加温されておらず、触媒３の加熱に所定時間（Ｔ）を要するため、この時間（Ｔ）中は十分にオゾン分解ができないという問題があった。
そこで、この実施の形態２では、図５（Ｂ）に示すように、排オゾン処理装置の運転の待機中は、ヒータ４により空気（大気流）を加熱し、この加熱された空気により触媒３を加熱する。
このように構成することで、排オゾン処理装置の運転開始直後から十分にオゾン分解ができる。
【００２４】
【発明の効果】
以上のように請求項１記載の発明によれば、排オゾンを加熱する加熱手段と、加熱された上記排オゾンを酸素に分解する触媒と、上記排オゾンの温度を検出する第１の検出手段と、上記触媒の温度を検出する第２の検出手段と、上記第１の検出手段と上記第２の検出手段の検出信号を切り替える切替手段と、上記加熱手段への供給電力を制御する、半導体素子で構成された電力制御手段と、上記触媒が設定温度に達した時に上記第１の検出手段の検出信号から上記第２の検出手段の検出信号に上記切替手段を切り替えさせ、上記第１の検出手段又は上記第２の検出手段により検出された温度に基づいて上記電力制御手段を制御する制御手段とを備えるように構成したので、触媒の自己発熱により触媒が設定温度より過熱することを抑制することができると共に、加熱手段への供給電力も抑制することができる効果がある。
また、加熱前の排オゾンの温度変化に対して、加熱手段に過度の負担（ストレス）をかけることなく、排オゾンを設定温度に安定して保つことができる効果がある。
また、従来の電磁接触器を使用する場合には電源の電圧変動に比例して加熱手段の消費電力が増減するが、電力制御手段を使用しているので、そのような加熱手段の消費電力の増減を抑えることができ、電源の電圧変動に対しても、設定温度を安定して保つことができる効果がある。
さらに、電力制御手段が半導体素子で構成されているので、電磁接触器等を使用する場合に発生するアークによる接点の磨耗を防止することができる効果がある。
【００２５】
請求項２記載の発明によれば、排オゾン流入前から加熱手段により大気を加熱するように構成したので、排オゾン流入直後から十分にオゾン分解ができる効果がある。
【図面の簡単な説明】
【図１】この発明の参考例による排オゾン処理装置を示す構成図である。
【図２】この発明の参考例による排オゾン処理装置の動作シーケンスを示すタイムチャートである。
【図３】この発明の実施の形態１による排オゾン処理装置を示す構成図である。
【図４】この発明の実施の形態１による排オゾン処理装置の動作シーケンスを示すタイムチャートである。
【図５】この発明の実施の形態２による排オゾン処理装置の動作シーケンスを示すタイムチャートである。
【図６】従来の排オゾン処理装置を示す構成図である。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an exhaust ozone treatment device that decomposes exhaust ozone using an ozonolysis solvent.
[0002]
[Prior art]
Ozone has a strong oxidizing power and has no pollution, and is therefore widely used in the field of water treatment and the like. Most of the supplied ozone is consumed by the contact reaction with raw water, but the excess ozone that cannot be consumed (hereinafter referred to as waste ozone) is harmful to the human body and is decomposed into oxygen by the waste ozone treatment device. , The ozone concentration is reduced to 0.01 ppm or less and released into the atmosphere.
[0003]
FIG. 6 is a configuration diagram showing a conventional exhaust ozone treatment apparatus. In the drawing, reference numeral 1 denotes an ozonized gas (exhaust ozone) which is a gas to be treated by the exhaust ozone treatment apparatus; Gas. Reference numeral 3 denotes a catalyst for decomposing the ozonized gas 1 into oxygen gas 2, 4 denotes a heater for heating the ozonized gas 1 in order to promote the ozone decomposing ability, and 5 denotes a temperature sensor for monitoring the temperature of the ozonized gas 1. Reference numeral 6 denotes a container (hereinafter, referred to as an ozonolysis tower) constituting the waste ozone treatment apparatus. The ozonolysis tower 6 houses the catalyst 3, the heater 4, and the temperature sensor 5 therein. Reference numeral 7 denotes a commercial power supply for supplying power to the heater 4, and reference numeral 8 denotes a contact of an electromagnetic contactor for turning on and off a power supply circuit of the heater 4. Reference numeral 9 denotes a controller for controlling the turning on and off of the contact 8 of the electromagnetic contactor based on the detected temperature obtained by the temperature sensor 5. Reference numeral 10 denotes an inlet of the ozone decomposition tower 6 into which the ozonized gas 1 enters, and reference numeral 11 denotes an outlet of the ozone decomposition tower 6 from which the treated oxygen gas 2 is discharged.
[0004]
Next, the operation will be described.
The ozonized gas 1 enters the ozone decomposition tower 6 through the inlet 10 of the ozone decomposition tower 6, is heated by the heater 4, is decomposed into oxygen gas 2 by the catalyst 3 housed in the ozone decomposition tower 6, and Oxygen gas 2 is discharged from the ozone decomposition tower 6 from an outlet 11 of 6.
The catalyst 3 is heated by the heated ozonized gas 1, and the ozone decomposition performance of the catalyst 3 is improved.
The temperature of the ozonized gas 1 is adjusted by comparing the detected temperature detected by the temperature sensor 5 with a preset set temperature by the controller 9 and turning on and off the contact 8 of the electromagnetic contactor.
[0005]
Incidentally, Japanese Patent Application Laid-Open No. Hei 4-371215 discloses a technique similar to the above-described conventional technique.
[0006]
[Problems to be solved by the invention]
Since the conventional waste ozone treatment apparatus is configured as described above, the contact of the electromagnetic contactor is turned on and off for temperature control of the gas to be treated. There was a problem that the contact was worn due to the arc when the contact was opened.
In addition, there is a problem that the heater is disconnected due to stress caused by turning on and off the heater.
Furthermore, since it takes time to heat the catalyst, there is a problem that it takes time to start up the ozone treatment apparatus.
[0007]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an exhaust ozone treatment apparatus that prevents wear of contacts of an electromagnetic contactor, disconnection of a heater, and the like, and that reduces startup time of the apparatus. The purpose is to get.
[0009]
[Means for Solving the Problems]
The exhaust ozone treatment apparatus according to the first aspect of the present invention includes a heating means for heating the exhaust ozone, a catalyst for decomposing the heated exhaust ozone into oxygen, and a first detecting means for detecting the temperature of the exhaust ozone. A second detecting means for detecting the temperature of the catalyst, a switching means for switching a detection signal of the first detecting means and a detection signal of the second detecting means, and a semiconductor for controlling power supplied to the heating means. An electric power control means constituted by an element, and switching the switching means from a detection signal of the first detection means to a detection signal of the second detection means when the catalyst reaches a set temperature; Control means for controlling the power control means based on the temperature detected by the detection means or the second detection means.
[0010]
The exhaust ozone treatment apparatus according to the second aspect of the present invention is configured such that the atmosphere is heated by a heating means before the inflow of the exhaust ozone.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment and a reference example of the present invention will be described.
Reference example .
FIG. 1 is a configuration diagram showing an exhaust ozone treatment apparatus according to a reference example of the present invention. In the drawing, reference numeral 1 denotes an ozonized gas (exhaust ozone) which is a gas to be treated in the exhaust ozone treatment apparatus; This is the processed oxygen gas (oxygen). 3 is a catalyst for decomposing ozonized gas 1 into oxygen gas 2, 4 is a heater (heating means) for heating ozonized gas 1 to promote ozone decomposing ability, and 5 is a temperature for monitoring the temperature of ozonized gas 1. It is a sensor (detection means). Reference numeral 6 denotes a container (hereinafter, referred to as an ozonolysis tower) constituting the waste ozone treatment apparatus. The ozonolysis tower 6 houses the catalyst 3, the heater 4, and the temperature sensor 5 therein. Reference numeral 7 denotes a commercial power supply for supplying power to the heater 4.
[0012]
Reference numeral 12 denotes a thyristor regulator (power control means) for varying a power supply voltage to the heater 4, and the thyristor regulator 12 is constituted by a thyristor which is a semiconductor element. Reference numeral 13 denotes a controller (control means) that controls the phase of the thyristor regulator 12 based on the temperature detected by the temperature sensor 5.
Reference numeral 10 denotes an inlet of the ozone decomposition tower 6 into which the ozonized gas 1 enters, and reference numeral 11 denotes an outlet of the ozone decomposition tower 6 from which the treated oxygen gas 2 is discharged.
[0013]
Next, the operation will be described.
First, the ozone treatment operation of the waste ozone treatment device will be described. The ozonized gas 1 enters the ozone decomposition tower 6 through the inlet 10 of the ozone decomposition tower 6, is heated by the heater 4, is decomposed into oxygen gas 2 by the catalyst 3 housed in the ozone decomposition tower 6, and Oxygen gas 2 is discharged from the ozone decomposition tower 6 from an outlet 11 of 6. Here, the reason why the ozonized gas 1 is heated is that the catalyst 3 is heated by the heated ozonized gas 1 and the ozone decomposition performance of the catalyst 3 is improved. Therefore, in order to obtain the optimum ozone decomposition performance of the catalyst 3, it is necessary to maintain the temperature of the ozonized gas 1 at a set temperature. In this exhaust ozone treatment apparatus, the controller 13 controls the thyristor regulator 12 to perform the operation. .
[0014]
Next, a sequence operation for adjusting the temperature of the ozonized gas 1 will be described. FIG. 2 is a time chart showing an operation sequence of the waste ozone treatment apparatus according to the reference example of the present invention, in which (a) shows the temperature of the ozonized gas before heating, (b) shows the voltage applied to the heater, and (c) shows the temperature. ) Indicates the power consumption of the heater, and (d) indicates the temperature of the ozonized gas after heating.
[0015]
As described above, it is necessary to keep the temperature of the ozonized gas 1 at the set temperature in order to obtain the optimum ozone decomposition performance of the catalyst 3. However, if the temperature of the ozonized gas 1 before heating entering from the inlet 10 of the ozonolysis tower 6 fluctuates due to various causes (for example, a temperature drop in winter), if the heating by the heater 4 is constant, The temperature of the ozonized gas 1 after heating also rises and falls, and the temperature of the ozonized gas 1 cannot be maintained at the set temperature. Therefore, when the temperature sensor 5 detects that the temperature of the ozonized gas 1 after heating increases with the temperature of the ozonized gas 1 before heating, the voltage applied to the heater 4 decreases. Next, the controller 13 controls the phase of the thyristor regulator 12. As the voltage applied to the heater 4 decreases, the power consumption of the heater 4 also decreases. Conversely, when the temperature sensor 5 detects that the temperature of the ozonized gas 1 after heating has decreased as the temperature of the ozonized gas 1 before heating has decreased, the voltage applied to the heater 4 The phase of the thyristor regulator 12 is controlled by the controller 13 so that is larger. As the voltage applied to the heater 4 increases, the power consumption of the heater 4 also increases. By such an operation, the temperature of the ozonized gas 1 after heating is always kept at the set temperature.
Although the temperature of the ozonized gas 1 after the heating is detected by the temperature sensor 5 in the above description, the temperature of the ozonized gas 1 before the heating is detected by the temperature sensor 5. The temperature of the gas 1 can be kept at the set temperature.
[0016]
As described above, according to this reference example , since the voltage applied to the heater 4 is varied by the thyristor regulator 12, an excessive load (stress) is applied to the heater 4 with respect to the temperature change of the ozonized gas 1 before heating. ) Can be stably maintained without applying the pressure.
When a conventional electromagnetic contactor is used, the power consumption of the heater 4 increases and decreases in proportion to the voltage fluctuation of the commercial power supply 7, but the thyristor regulator 12 suppresses such an increase and decrease of the power consumption of the heater 4. Therefore, the set temperature can be stably maintained even when the voltage of the commercial power supply 7 fluctuates.
Further, since the thyristor regulator 12 is formed of a semiconductor element, it is possible to prevent abrasion of the contact due to an arc generated when an electromagnetic contactor or the like is used.
[0017]
Embodiment 1 FIG.
In the above reference example , the case where the temperature of the ozonized gas 1 is detected by the temperature sensor 5, the applied voltage of the heater 4 is controlled based on the detected temperature, and the temperature of the ozonized gas 1 after heating is maintained at the set temperature. As described above, since the catalyst 3 generates heat when heated, it is necessary not only to keep the heated ozonized gas 1 at the set temperature but also to keep the temperature of the catalyst 3 at the set temperature. Therefore, the exhaust ozone treatment apparatus according to the second embodiment is configured so that the temperature of the catalyst 3 can be maintained at the set temperature.
FIG. 3 is a block diagram showing an exhaust ozone treatment apparatus according to Embodiment 1 of the present invention. In the drawing, reference numeral 5a denotes a temperature sensor (first detecting means) 5 provided separately from the temperature sensor 5 for detecting the temperature of the catalyst 3. A temperature sensor (second detection means) 14 is a switch (switching means) for switching the detection signals of the temperature sensor 5 and the temperature sensor 5a. Reference numeral 15 denotes a controller (control means) for switching the changeover switch 14 and controlling the phase of the thyristor regulator 12 based on the detected temperature obtained by the temperature sensor 5 or 5a. Note that the same or corresponding parts as those in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted.
[0018]
Next, the operation will be described.
The ozone treatment operation of the exhaust ozone treatment apparatus is the same as that of the above-described reference example, and thus the description thereof is omitted, and a sequence operation for adjusting the temperature of the catalyst 3 will be described. FIG. 4 is a time chart showing an operation sequence of the exhaust ozone treatment apparatus according to Embodiment 1 of the present invention. In FIG. 4, (a) is a catalyst temperature, (b) is a temperature detection point, and (c) is a heater temperature. Power consumption, (d) shows the ozonized gas temperature before heating, and (e) shows the ozonized gas temperature after heating.
[0019]
The ozonized gas 1 entering from the inlet 10 of the ozonolysis tower 6 is heated by the heater 4, and the heated ozonized gas 1 heats the catalyst 3 to gradually increase the temperature. During this time, the changeover switch 14 is switched to the temperature sensor 5 side and detects the temperature of the ozonized gas 1 after heating, as in the above-described reference example. Even so, the temperature of the ozonized gas 1 can be maintained at the set temperature. When the temperature of the catalyst 3 rises to the set temperature of the catalyst 3 (t1), the controller 15 causes the temperature sensor 5a to switch the changeover switch 14 so that the temperature of the catalyst 3 is detected by the temperature sensor 5a. . When the temperature of the catalyst 3 rises due to the self-heating caused by the heating of the catalyst 3, the thyristor regulator 12 is controlled by the controller 15 so that the voltage applied to the heater 4 decreases. By performing the temperature control including the self-heat generation due to the heating of the catalyst 3, the temperature of the catalyst 3 is maintained at the set temperature, and the power consumption to the heater 4 is reduced.
[0020]
As described above, according to the first embodiment, when the temperature of the catalyst 3 reaches the set temperature, the controller 15 switches the switch 14 to the temperature sensor 5a to detect the temperature of the catalyst 3. Therefore, it is possible to suppress the catalyst 3 from being overheated from the set temperature due to the self-heating of the catalyst 3 and to suppress the power supply to the heater 4.
[0021]
Embodiment 2 FIG.
FIG. 5 is a time chart showing an operation sequence of the exhaust ozone treatment apparatus according to Embodiment 2 of the present invention. FIG. 5 (A) is a time chart showing an operation sequence in which it takes time to heat the catalyst 3, and FIG. 6 is a time chart showing an operation sequence in which heating does not require a long time. 5 (A) and 5 (B), (a) shows the operating state of the waste ozone treatment apparatus, (b) shows the voltage applied to the heater, and (c) shows the temperature of the catalyst.
[0022]
In the above reference example and Embodiment 1 , as shown in FIG. 5A, immediately after the heating of the heater 4 is started, the ozonized gas 1 is not heated to the set temperature, and the heating of the catalyst 3 takes a predetermined time. Since (T) is required, there is a problem that ozone decomposition cannot be sufficiently performed during this time (T).
Therefore, in the second embodiment, as shown in FIG. 5B, during standby of the operation of the exhaust ozone treatment apparatus, air (atmospheric flow) is heated by the heater 4, and the catalyst 3 is heated by the heated air. Heat.
With this configuration, it is possible to sufficiently decompose ozone immediately after the operation of the waste ozone treatment apparatus is started.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, the heating means for heating the exhausted ozone, the catalyst for decomposing the heated exhausted ozone into oxygen, and the first detecting means for detecting the temperature of the exhausted ozone A second detecting means for detecting the temperature of the catalyst, a switching means for switching a detection signal of the first detecting means and a detection signal of the second detecting means, and a semiconductor for controlling power supplied to the heating means. An electric power control means constituted by an element, and switching the switching means from a detection signal of the first detection means to a detection signal of the second detection means when the catalyst reaches a set temperature; A control unit for controlling the power control unit based on the temperature detected by the detection unit or the second detection unit, so that the catalyst is prevented from being overheated from a set temperature due to self-heating of the catalyst. This It is, the power supplied to the heating means also has the effect can be suppressed.
Further, there is an effect that the exhausted ozone can be stably maintained at the set temperature without applying an excessive load (stress) to the heating means with respect to the temperature change of the exhausted ozone before heating.
In addition, when a conventional electromagnetic contactor is used, the power consumption of the heating means increases or decreases in proportion to the voltage fluctuation of the power supply. However, since the power control means is used, the power consumption of such a heating means is reduced. An increase and decrease can be suppressed, and there is an effect that the set temperature can be stably maintained even when the power supply voltage fluctuates.
Further, since the power control means is constituted by a semiconductor element, there is an effect that it is possible to prevent abrasion of the contact due to an arc generated when an electromagnetic contactor or the like is used.
[0025]
According to the second aspect of the invention, since the atmosphere is heated by the heating means before the inflow of the exhausted ozone, there is an effect that the ozone can be sufficiently decomposed immediately after the inflow of the exhausted ozone.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a waste ozone treatment apparatus according to a reference example of the present invention.
FIG. 2 is a time chart showing an operation sequence of the waste ozone treatment apparatus according to the reference example of the present invention.
FIG. 3 is a configuration diagram showing a waste ozone treatment apparatus according to Embodiment 1 of the present invention.
FIG. 4 is a time chart showing an operation sequence of the waste ozone treatment apparatus according to Embodiment 1 of the present invention.
FIG. 5 is a time chart showing an operation sequence of the waste ozone treatment apparatus according to Embodiment 2 of the present invention.
FIG. 6 is a configuration diagram showing a conventional waste ozone treatment apparatus.

Claims (2)

排オゾンを加熱する加熱手段と、加熱された上記排オゾンを酸素に分解する触媒と、上記排オゾンの温度を検出する第１の検出手段と、上記触媒の温度を検出する第２の検出手段と、上記第１の検出手段と上記第２の検出手段の検出信号を切り替える切替手段と、上記加熱手段への供給電力を制御する、半導体素子で構成された電力制御手段と、上記触媒が設定温度に達した時に上記第１の検出手段の検出信号から上記第２の検出手段の検出信号に上記切替手段を切り替えさせ、上記第１の検出手段又は上記第２の検出手段により検出された温度に基づいて上記電力制御手段を制御する制御手段とを備えた排オゾン処理装置。Heating means for heating the exhausted ozone, a catalyst for decomposing the heated exhausted ozone into oxygen, first detecting means for detecting the temperature of the exhausted ozone, and second detecting means for detecting the temperature of the catalyst Switching means for switching detection signals of the first detection means and the second detection means, power control means comprising semiconductor elements for controlling power supplied to the heating means, and setting of the catalyst When the temperature is reached, the switching means is switched from the detection signal of the first detection means to the detection signal of the second detection means, and the temperature detected by the first detection means or the second detection means is changed. And a control means for controlling the electric power control means on the basis of the above. 排オゾン流入前から加熱手段により大気を加熱することを特徴とする請求項１記載の排オゾン処理装置。Discharging ozone treatment apparatus according to claim 1, wherein heating the air by the heating means before discharge ozone flows.
JP30938396A 1996-11-20 1996-11-20 Waste ozone treatment equipment Expired - Fee Related JP3553298B2 (en)

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102764587A (en) * 2012-08-03 2012-11-07 北京化工大学常州先进材料研究院 Method for processing waste gas containing ozone

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
JP5467626B2 (en) * 2008-12-15 2014-04-09 株式会社名機製作所 Deodorizing device control method
CN102764589B (en) * 2012-08-03 2014-06-25 北京化工大学常州先进材料研究院 Ozone-containing waste gas treatment device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102764587A (en) * 2012-08-03 2012-11-07 北京化工大学常州先进材料研究院 Method for processing waste gas containing ozone

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