JP2004150681A - Method and device for operation control of heat reserved combustion type exhaust gas purification device - Google Patents
Method and device for operation control of heat reserved combustion type exhaust gas purification device Download PDFInfo
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Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、蓄熱燃焼式排ガス浄化装置の運転制御方法およびその装置に係り、より詳しくは揮発性有機化合物などの可燃性有害成分を含有する排ガスを燃焼処理するとともに燃焼処理によって発生した熱を前記排ガスの予備加熱に再利用する蓄熱燃焼式排ガス浄化装置の運転制御方法およびその装置に関する。
【０００２】
【従来の技術】
従来、 揮発性有機化合物などの可燃性有害成分を含有する排ガスを燃焼処理するとともに燃焼処理によって発生した熱を前記排ガスの予備加熱に再利用する蓄熱燃焼式排ガス浄化装置がある（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開昭５４−１２８１７１公報
【０００４】
しかし、このよう構成された従来の蓄熱燃焼式排ガス浄化装置においては、可燃性有害成分の含有濃度が濃い排ガスを供給すると、この排ガスの燃焼による発熱量の増加により燃焼室内の温度が上昇するため、燃焼室に開度調節可能なダンパとバイパスダクトを設置することにより、燃焼室内の温度測定結果を前記ダンパの開度制御にフィードバックし、燃焼室内の処理済高温エアの一部を蓄熱層を通過させることなく燃焼室より直接排出することにより燃焼室内の温度を安定化させる方法が実施されている。しかしながら、さらに高濃度（例えば爆発下限界の１／４濃度以上）の可燃性有害成分を含む排ガスを処理する場合、爆発する危険性が高くなるため、安全上の観点から排ガス処理を一時中止しなければならないが、上記燃焼室内の温度計測及びダンパによる温度制御のみでは爆発の危険性を排除した運転制御を実施できないなどの問題があった。
【０００５】
本発明は、上記の問題を解消するために成されたもので、その目的は、排ガスの可燃性有害成分の含有濃度が所定値より高い場合、蓄熱燃焼式排ガス浄化装置の運転を適切に制御することができる方法およびその装置を提供することにある。
【０００６】
【課題を解決するための手段】
上記の目的を達成するために本発明における蓄熱燃焼式排ガス浄化装置に対する排ガス給排方法は、揮発性有機化合物などの可燃性有害成分を含有する排ガスを燃焼処理するとともに燃焼処理によって発生した熱を前記排ガスの予備加熱に再利用する蓄熱燃焼式排ガス浄化装置の運転制御方法であって、未処理の前記排ガスの可燃性有害成分含有濃度が所定値より高い時にはこの排ガスを前記蓄熱燃焼式排ガス浄化装置に供給せずに大気中に放出するとともに前記蓄熱燃焼式排ガス浄化装置を待機運転あるいはアフターパージ運転後停止することが可能であることを特徴とする。
【０００７】
【発明の実施の形態】
以下、本発明を適用した排ガス処理設備の一実施例について図１に基づき詳細に説明する。本排ガス処理設備は、揮発性有機化合物などの可燃性有害成分を含有する排ガスを燃焼処理するとともに燃焼処理によって発生した熱を前記排ガスの予備加熱に再利用する蓄熱燃焼式排ガス浄化装置１と、この蓄熱燃焼式排ガス浄化装置１の排ガス供給孔２に接続されて、未処理の排ガスの可燃性有害成分含有濃度が所定値より高い時にはこの排ガスを前記蓄熱燃焼式排ガス浄化装置１に供給せずに大気中に放出する機能を有する排ガス給排選別手段３とで、構成してある。
【０００８】
そして、この排ガス給排選別手段３においては、揮発性有機化合物などの可燃性有害成分を含有する排ガスが発生する排ガス発生装置（図示せず）と連通するダクト４の先端に送風機５の吸引口が接続してあり、送風機５の放出口にはダクト６の一端が接続してある。ダクト６の他端には分岐ダクト７の一端が接続してあり、分岐ダクト７の２つの他端には２個の電磁作動式ダンパ８・９がそれぞれ接続してある。他方の電磁作動式ダンパ９はダクト１０および送風機１１を介して前記蓄熱燃焼式酸化装置１の供給孔２に接続してある。
【０００９】
また、前記ダクト６における前記送風機５寄り位置には排ガスの可燃性有害成分の含有濃度を測定する濃度測定計１２が装着してあり、前記濃度測定計１２装着部以降分岐ダクト７までのダクト長さは濃度測定時間中に排ガスが吸引される移動距離に対して十分な長さがあり、濃度測定計１２は、制御盤（図示せず）を介して前記電磁作動式ダンパ８・９にそれぞれ電気的に接続してある。また、前記ダクト４にはダンパ１３を介して大気が接続してあり、前記ダクト１０はダンパ１４を介して大気に接続してある。
【００１０】
なお、図中符号１５は前記蓄熱燃焼式排ガス浄化装置１の燃焼室に接続されて処理済の排ガスを排出するためのダンパであり、燃焼熱により燃焼室内のガス温度が上昇して燃焼室内のガス温度が所定値以上（例えば、８５０℃以上）になると、ダンパ１５が適宜開かれて高温エアの一部が燃焼室内から大気中に排出される。
【００１１】
このように構成されたものは、処理するために未処理の排ガスを給排選別手段３のダクト４に誘導すると、ダンパ１３からの大気の吹込みによって可燃性有害成分含有濃度が蓄熱燃焼式酸化装置１で処理可能な濃度（例えば、爆発下限界濃度の１／４）以下に希釈され、排ガスは給排選別手段３の送風機５により吸引された後ダクト６内に排出され、続いて、濃度測定計１２によってその可燃性有害成分含有濃度が測定される。濃度測定の結果、その濃度が所定の範囲内にある通常の場合には、電磁作動式ダンパ８が閉じられるとともに電磁作動式ダンパ９が開けられて、未処理の排ガスは給排選別手段３のダクト１０内を通過した後送風機５１１によって蓄熱燃焼式酸化装置１の排ガス供給孔２に送り込まれる。
【００１２】
他方、吸引状態の変動などにより未処理の排ガス中の可燃性有害成分含有濃度が極めて高く、全開のダンパ１３からの大気の吹込みによっても濃度測定計１２による濃度測定の結果、可燃性有害成分含有濃度が設定濃度以上（例えば、爆発下限界濃度の１／４濃度以上）となった場合には、測定された未処理の排ガスが分岐ダクト７に到達する前に電磁作動式ダンパ８が開けられるとともに、電磁作動式ダンパ９が閉じられ、未処理の排ガスを電磁作動式ダンパ８から放出する。このとき蓄熱燃焼式排ガス浄化装置１は、ダンパ１４を開いて外気を吸い込みながら、濃度測定計１２による測定の結果が所定の濃度以下になるまで待機運転することもできるし、アフターパージ運転実施後運転を停止するようにしてもよい。尚、本実施例では通常吸引する未処理の排ガス中に含まれる有害成分の濃度が濃いため、あらかじめダンパ１３より大気を取り込み蓄熱燃焼式排ガス浄化装置で処理できる濃度以下に希釈しているが、このダンパの開度調整は自動あるいは手動いずれの方法でもよく、また、通常吸引する濃度が蓄熱燃焼式排ガス浄化装置で処理できる濃度以下の場合には、希釈用の大気を取り込む必要がないため、ダンパ１３が不要となることは明白である。
【００１４】
【発明の効果】
以上の説明から明らかなように本発明は、揮発性有機化合物などの可燃性有害成分を含有する排ガスを燃焼処理するとともに燃焼処理によって発生した熱を前記排ガスの予備加熱に再利用する蓄熱燃焼式排ガス浄化装置の運転制御方法及び制御装置であって、未処理の前記排ガスの可燃性有害成分含有濃度が所定値より高い時にはこの排ガスを前記蓄熱燃焼式排ガス浄化装置に供給せずに大気中に放出するとともに蓄熱燃焼式排ガス浄化装置１は、ダンパ１４を開いて外気を吸い込みながら、濃度測定計１２による測定の結果が所定の濃度以下になるまで待機運転することもできるし、アフターパージ運転実施後運転を停止することも可能となるので、蓄熱燃焼式排ガス浄化装置を爆発の危険性なく安全に運転制御することができるなどの優れた実用的効果を奏する。
【図面の簡単な説明】
【図１】本発明の一実施例を示す模式図である。
【符号の説明】
１ 蓄熱燃焼式酸化装置
３ 未処理可燃性有害ガスの給排選別手段[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an operation control method and apparatus for a heat storage combustion type exhaust gas purifying apparatus, and more particularly, to a method for performing combustion treatment on exhaust gas containing flammable harmful components such as volatile organic compounds and the heat generated by the combustion treatment. The present invention relates to an operation control method of a regenerative combustion type exhaust gas purifying apparatus which is reused for preheating of exhaust gas, and an apparatus therefor.
[0002]
[Prior art]
BACKGROUND ART Conventionally, there is a regenerative combustion type exhaust gas purifying apparatus that combusts exhaust gas containing a flammable harmful component such as a volatile organic compound and reuses heat generated by the combustion process for preheating the exhaust gas. 1).
[0003]
[Patent Document 1]
JP-A-54-128171
However, in the conventional heat storage combustion type exhaust gas purifying apparatus configured as described above, when an exhaust gas having a high concentration of flammable harmful components is supplied, the temperature in the combustion chamber increases due to an increase in the amount of heat generated by the combustion of the exhaust gas. By installing a damper and a bypass duct whose opening can be adjusted in the combustion chamber, the temperature measurement result in the combustion chamber is fed back to the opening control of the damper, and a part of the treated high-temperature air in the combustion chamber is stored in the heat storage layer. A method of stabilizing the temperature in the combustion chamber by directly discharging the gas from the combustion chamber without passing the gas has been implemented. However, when processing exhaust gas containing a flammable harmful component having a higher concentration (for example, 1/4 or more of the lower explosion limit), there is a high risk of explosion. However, there is a problem in that operation control that eliminates the danger of explosion cannot be performed only by measuring the temperature in the combustion chamber and controlling the temperature using a damper.
[0005]
The present invention has been made to solve the above-described problem, and an object of the present invention is to appropriately control the operation of a heat storage combustion type exhaust gas purification device when the concentration of flammable harmful components in exhaust gas is higher than a predetermined value. And a device therefor.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an exhaust gas supply / exhaust method for a regenerative combustion type exhaust gas purifying apparatus according to the present invention is configured to perform a combustion process on an exhaust gas containing a flammable harmful component such as a volatile organic compound and to generate heat generated by the combustion process. A method for controlling the operation of a regenerative combustion type exhaust gas purifying apparatus which is reused for preheating the exhaust gas, wherein when the concentration of a flammable harmful component in the untreated exhaust gas is higher than a predetermined value, the exhaust gas is purified by the regenerative combustion type exhaust gas purifying method. It is characterized in that it is released to the atmosphere without being supplied to the device, and the regenerative combustion type exhaust gas purifying device can be stopped after a standby operation or an after-purge operation.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an exhaust gas treatment facility to which the present invention is applied will be described in detail with reference to FIG. The present exhaust gas treatment equipment is a heat storage combustion type exhaust gas purifying apparatus 1 that performs a combustion process on an exhaust gas containing a flammable harmful component such as a volatile organic compound and reuses heat generated by the combustion process for preheating the exhaust gas. When connected to the exhaust gas supply hole 2 of the heat storage combustion type exhaust gas purification device 1 and the concentration of the flammable harmful component in the untreated exhaust gas is higher than a predetermined value, the exhaust gas is not supplied to the heat storage combustion type exhaust gas purification device 1 And an exhaust gas supply / discharge sorting means 3 having a function of releasing it into the atmosphere.
[0008]
In the exhaust gas supply / discharge sorting means 3, the suction port of the blower 5 is provided at the end of a duct 4 communicating with an exhaust gas generator (not shown) that generates an exhaust gas containing a flammable harmful component such as a volatile organic compound. And one end of a duct 6 is connected to the discharge port of the blower 5. One end of a branch duct 7 is connected to the other end of the duct 6, and two electromagnetically operated dampers 8.9 are connected to two other ends of the branch duct 7, respectively. The other electromagnetically operated damper 9 is connected to the supply hole 2 of the regenerative combustion oxidizer 1 via a
[0009]
At a position near the blower 5 in the duct 6, a concentration meter 12 for measuring the concentration of the flammable harmful component of the exhaust gas is mounted, and a duct length from the mounting portion of the concentration meter 12 to the branch duct 7. It is long enough to move the exhaust gas during the concentration measurement time, and the concentration meter 12 is connected to the electromagnetically actuated dampers 8 and 9 via a control panel (not shown). Electrically connected. The duct 4 is connected to the atmosphere via a damper 13, and the
[0010]
Reference numeral 15 in the figure denotes a damper connected to the combustion chamber of the heat storage combustion type exhaust gas purifying apparatus 1 for discharging the treated exhaust gas. When the gas temperature becomes equal to or higher than a predetermined value (for example, equal to or higher than 850 ° C.), the damper 15 is opened appropriately and a part of the high-temperature air is discharged from the combustion chamber to the atmosphere.
[0011]
When the untreated exhaust gas is guided to the duct 4 of the supply / exhaust separation means 3 for processing, the concentration of the flammable harmful component in the air is blown into the atmosphere by the damper 13 so that the concentration of the flammable harmful component can be reduced. The exhaust gas is diluted to a concentration lower than the concentration that can be processed by the apparatus 1 (for example, 1/4 of the lower explosive limit concentration), and the exhaust gas is drawn into the duct 6 after being sucked by the blower 5 of the supply / exhaust separation means 3. The concentration of the flammable harmful component is measured by the measuring meter 12. As a result of the concentration measurement, in a normal case where the concentration is within a predetermined range, the electromagnetically actuated damper 8 is closed and the electromagnetically actuated damper 9 is opened. After passing through the
[0012]
On the other hand, the concentration of flammable harmful components in the untreated exhaust gas is extremely high due to fluctuations in the suction state and the like. As a result of the concentration measurement by the concentration meter 12 even when air is blown in from the fully open damper 13, the flammable harmful components When the concentration exceeds the set concentration (for example, 1/4 or more of the lower explosive limit concentration), the electromagnetically actuated damper 8 is opened before the measured untreated exhaust gas reaches the branch duct 7. At the same time, the electromagnetically operated damper 9 is closed, and the untreated exhaust gas is discharged from the electromagnetically operated damper 8. At this time, the heat storage combustion type exhaust gas purifying apparatus 1 can perform a standby operation until the result of the measurement by the concentration meter 12 becomes equal to or less than a predetermined concentration while opening the damper 14 and sucking in the outside air. The operation may be stopped. In the present embodiment, since the concentration of harmful components contained in the untreated exhaust gas that is normally sucked is high, the air is taken in advance from the damper 13 and diluted to a concentration below the concentration that can be processed by the heat storage combustion type exhaust gas purification device. The degree of opening of the damper may be adjusted automatically or manually, and when the concentration to be normally sucked is lower than the concentration that can be processed by the regenerative combustion type exhaust gas purifying device, it is not necessary to take in the atmosphere for dilution. Obviously, the damper 13 becomes unnecessary.
[0014]
【The invention's effect】
As is apparent from the above description, the present invention provides a regenerative combustion system in which an exhaust gas containing a flammable harmful component such as a volatile organic compound is subjected to a combustion process and heat generated by the combustion process is reused for preheating the exhaust gas. An operation control method and a control device for an exhaust gas purifying device, wherein when the concentration of a flammable harmful component contained in the untreated exhaust gas is higher than a predetermined value, the exhaust gas is not supplied to the regenerative combustion type exhaust gas purifying device and is discharged to the atmosphere. The exhaust gas purifying apparatus 1 of the regenerative combustion type while releasing the air can open the damper 14 and suck in the outside air, perform a standby operation until the result of the measurement by the concentration meter 12 becomes a predetermined concentration or less, or execute the after-purge operation. It is also possible to stop the post-operation, which makes it possible to safely control the operation of the regenerative combustion exhaust gas purification device without danger of explosion. Achieve the practical effect was.
[Brief description of the drawings]
FIG. 1 is a schematic view showing one embodiment of the present invention.
[Explanation of symbols]
1. Thermal storage combustion type oxidizer 3. Supply / discharge separation means for untreated combustible harmful gas
Claims (2)
未処理の前記排ガスの可燃性有害成分含有濃度が所定値より高い時にはこの排ガスを前記蓄熱燃焼式排ガス浄化装置に供給せずに大気中に放出するとともに前記蓄熱燃焼式排ガス浄化装置を待機運転あるいはアフターパージ運転後停止するが可能であることを特徴とする蓄熱燃焼式排ガス浄化装置の運転制御方法。An operation control method of a regenerative combustion type exhaust gas purifying apparatus that performs a combustion process on an exhaust gas containing a flammable harmful component such as a volatile organic compound and reuses heat generated by the combustion process for preheating the exhaust gas,
When the concentration of the flammable harmful component in the untreated exhaust gas is higher than a predetermined value, the exhaust gas is released to the atmosphere without being supplied to the regenerative combustion type exhaust gas purifying device, and the regenerative combustion type exhaust gas purifying device is operated in standby mode or An operation control method for a regenerative combustion type exhaust gas purifying apparatus, which can be stopped after an after-purge operation.
前記蓄熱燃焼式排ガス浄化装置の排ガス供給孔に、未処理の前記排ガスの可燃性有害成分含有濃度が所定値より高い時にはこの排ガスを前記蓄熱燃焼式排ガス浄化装置に供給せずに大気中に放出する機能を有する排ガス給排選別手段を設けたことを特徴とする蓄熱燃焼式排ガス浄化装置。An operation control device of a regenerative combustion type exhaust gas purifying apparatus that performs a combustion process on an exhaust gas containing a flammable harmful component such as a volatile organic compound and reuses heat generated by the combustion process for preheating the exhaust gas,
When the concentration of a flammable harmful component in the untreated exhaust gas is higher than a predetermined value, the exhaust gas is discharged to the atmosphere without being supplied to the heat storage combustion type exhaust gas purification device. A regenerative combustion type exhaust gas purifying apparatus comprising an exhaust gas supply / exhaust separation means having a function of performing the following.
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| WO2005114926A1 (en) | 2004-05-20 | 2005-12-01 | Freebit Co., Ltd. | Server for routing connection to client device |
| CN102782409A (en) * | 2010-10-05 | 2012-11-14 | 新东工业株式会社 | Exhaust gas purification device and temperature control method therefor |
| CN104456616A (en) * | 2013-09-24 | 2015-03-25 | 湖南巴陵炉窑节能股份有限公司 | Control method of regenerative combustion equipment |
| TWI482932B (en) * | 2009-09-22 | 2015-05-01 | Sintokogio Ltd | Regenerative combustion exhaust gas purification system and its operation method |
| CN106016305A (en) * | 2016-05-16 | 2016-10-12 | 南京大学盐城环保技术与工程研究院 | Method for removing organic waste gas containing waste gas low in spontaneous ignition point |
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