JPH0584411A - Exhaust gas treating equipment - Google Patents
Exhaust gas treating equipmentInfo
- Publication number
- JPH0584411A JPH0584411A JP3119070A JP11907091A JPH0584411A JP H0584411 A JPH0584411 A JP H0584411A JP 3119070 A JP3119070 A JP 3119070A JP 11907091 A JP11907091 A JP 11907091A JP H0584411 A JPH0584411 A JP H0584411A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- gas
- filter cloth
- catalyst
- chamber
- 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.)
- Pending
Links
- 239000004744 fabric Substances 0.000 claims abstract description 43
- 239000003054 catalyst Substances 0.000 claims abstract description 39
- 238000005192 partition Methods 0.000 claims abstract description 11
- 238000011282 treatment Methods 0.000 claims description 35
- 238000007670 refining Methods 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 abstract description 149
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 105
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 19
- 239000000428 dust Substances 0.000 abstract description 19
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract description 19
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract description 19
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 abstract description 13
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 abstract description 2
- 230000001627 detrimental effect Effects 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 19
- 229910052815 sulfur oxide Inorganic materials 0.000 description 11
- 229910021529 ammonia Inorganic materials 0.000 description 9
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 9
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 9
- 235000011116 calcium hydroxide Nutrition 0.000 description 9
- 239000000920 calcium hydroxide Substances 0.000 description 9
- 230000002378 acidificating effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 150000002013 dioxins Chemical class 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、焼却炉等の排ガス中
に含まれるダスト、塩化水素、硫黄酸化物、窒素酸化物
等の有害成分を排除する排ガス処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas treatment apparatus for removing harmful components such as dust, hydrogen chloride, sulfur oxides and nitrogen oxides contained in exhaust gas from incinerators and the like.
【０００２】[0002]
【従来の技術】ゴミ焼却炉から排出される排ガス中に
は、ダストの他に、塩化水素、硫黄酸化物、窒素酸化物
等の有害成分が多量に含まれている。これらのダストや
有害成分を除去するための排ガス処理装置としては、従
来より種々のものが知られているが、例えば、従来の典
型的な排ガス処理装置は、図６に示すように、焼却炉の
下流側に設けられたバグフィルタ装置１７、バグフィル
タ装置１７の下流側に設けた窒素酸化物を除去するため
の脱硝装置１８、バグフィルタ装置１７の直前で消石灰
の粉末を添加する消石灰添加装置１３、脱硝装置１８の
直前でアンモニアを添加するアンモニア添加装置１４か
ら構成されている。また、バグフィルタ装置は、処理塔
の内部を仕切板で清澄ガス室と未処理ガス室に分割し、
その仕切板に筒状のろ布を取付け、圧縮ガスを該ろ布の
内部に間欠的に供給するガス配管を設け、未処理ガス室
に導入した排ガスを前記ろ布でろ過して清澄ガスを前記
ろ布の内部を経て清澄ガス室に導入するように構成され
ている。焼却炉から排出された排ガス１２は、バグフィ
ルタ装置１７に流入する直前で消石灰などのアルカリ性
の粉末或いはスラリーを添加され、排ガス１２中の酸性
成分と中和反応する。そして、その後にその反応生成物
とダストが同時にバグフィルタ装置１７のろ布で除去さ
れる。この排ガス処理は塩化水素及び硫黄酸化物の除去
には有効であるが、窒素酸化物の除去には効果を果たさ
ない。そこで、窒素酸化物を除去するために、更に、窒
素酸化物還元触媒（脱硝用触媒ともいう）を充填した脱
硝装置１８を使用し、アンモニアの存在下で触媒と接触
させることにより、窒素酸化物を窒素ガスに還元反応さ
せる処理が行われている。このように、排ガス中に含ま
れる成分の種類によって異なる処理が段階的に行われて
いる。2. Description of the Related Art Exhaust gas discharged from a refuse incinerator contains a large amount of harmful components such as hydrogen chloride, sulfur oxides and nitrogen oxides in addition to dust. Various types of exhaust gas treatment devices for removing these dusts and harmful components have been conventionally known. For example, a conventional typical exhaust gas treatment device is an incinerator as shown in FIG. Filter device 17 provided downstream of the bag filter, denitration device 18 provided downstream of the bag filter device 17 for removing nitrogen oxides, and slaked lime addition device for adding slaked lime powder immediately before the bag filter device 17. 13 and an ammonia adding device 14 for adding ammonia immediately before the denitration device 18. Also, the bag filter device divides the inside of the processing tower into a refining gas chamber and an untreated gas chamber with a partition plate,
A tubular filter cloth is attached to the partition plate, a gas pipe for intermittently supplying compressed gas to the inside of the filter cloth is provided, and the exhaust gas introduced into the untreated gas chamber is filtered by the filter cloth to produce a clear gas. It is configured to be introduced into the fining gas chamber through the inside of the filter cloth. The exhaust gas 12 discharged from the incinerator is added with alkaline powder or slurry such as slaked lime immediately before flowing into the bag filter device 17, and undergoes a neutralization reaction with the acidic components in the exhaust gas 12. Then, after that, the reaction product and dust are simultaneously removed by the filter cloth of the bag filter device 17. This exhaust gas treatment is effective in removing hydrogen chloride and sulfur oxides, but is not effective in removing nitrogen oxides. Therefore, in order to remove the nitrogen oxides, a denitration device 18 further filled with a nitrogen oxide reduction catalyst (also referred to as a denitration catalyst) is used and brought into contact with the catalyst in the presence of ammonia. Is being reduced to nitrogen gas. In this way, different treatments are performed stepwise depending on the types of components contained in the exhaust gas.
【０００３】[0003]
【発明が解決しようとする課題】ところで、塩化水素は
排ガスの温度が低い方が除去率が高いのに対し、逆に窒
素酸化物は排ガスの温度が高い方が除去率が高いことが
知られている。従って、排ガスが高温の段階で窒素酸化
物を除去し、温度が低下した段階でダスト及び塩化水素
を除去する方法が、熱的には妥当なプロセスといえる。
しかし、このプロセスでは、ダストが窒素酸化物還元触
媒中に付着し、触媒の寿命を著しく減少させると共に、
通気抵抗が増加するという欠点がある。これに対し、図
６に示すように、まず最初にバグフィルタ装置１７でダ
スト及び塩化水素の除去を行ない、次いで脱硝装置１８
で窒素酸化物の除去を行なうならば、触媒に対するダス
トの障害は改善される反面、一方の装置を除去に最適な
温度に設定すると、他方の装置は最適温度にすることが
できなくなり、除去率が低下するという欠点がある。即
ち、バグフィルタ装置１７へ流入する排ガスの温度が塩
化水素の除去に最適な温度となるように温度設定する
と、脱硝装置１８に流入する排ガスの温度は低下し過ぎ
て、窒素酸化物の除去率がかなり減少してしまう。By the way, it is known that hydrogen chloride has a higher removal rate when the exhaust gas temperature is lower, whereas nitrogen oxide has a higher removal rate when the exhaust gas temperature is higher. ing. Therefore, it can be said that a method of removing nitrogen oxides when the exhaust gas is at a high temperature and removing dust and hydrogen chloride when the temperature is low is a thermally appropriate process.
However, in this process, dust adheres to the nitrogen oxide reduction catalyst, significantly reducing the life of the catalyst, and
It has the drawback of increased ventilation resistance. On the other hand, as shown in FIG. 6, the bag filter device 17 first removes dust and hydrogen chloride, and then the denitration device 18
If nitrogen oxides are removed with, the obstacles of dust to the catalyst will be improved, but if one device is set to the optimum temperature for removal, the other device cannot be set to the optimum temperature and the removal rate Has the drawback of decreasing. That is, when the temperature of the exhaust gas flowing into the bag filter device 17 is set to be the optimum temperature for removing hydrogen chloride, the temperature of the exhaust gas flowing into the denitration device 18 becomes too low, and the removal rate of nitrogen oxides is reduced. Will be significantly reduced.
【０００４】そこで、この発明の目的は、上記の課題を
解決することであり、ダスト、塩化水素、硫黄酸化物等
の除去を行った直後で、しかも排ガスの温度が低下しな
いうちに窒素酸化物も除去することであり、それによっ
て排ガス中のダスト、塩化水素、硫黄酸化物、窒素酸化
物等の除去率が向上させる排ガス処理装置を提供するこ
とである。Therefore, an object of the present invention is to solve the above-mentioned problems, that is, nitrogen oxides immediately after the removal of dust, hydrogen chloride, sulfur oxides, etc., and before the temperature of the exhaust gas decreases. Another object of the present invention is to provide an exhaust gas treatment device which can improve the removal rate of dust, hydrogen chloride, sulfur oxides, nitrogen oxides, etc. in exhaust gas.
【０００５】[0005]
【課題を解決するための手段】この発明は、上記の目的
を達成するために、次のように構成されている。即ち、
この発明は、処理塔の内部を仕切板で清澄ガス室と未処
理ガス室に分割し、該仕切板に筒状ろ布を配置し、圧縮
ガスを前記ろ布の内部に供給するガス配管を設け、前記
未処理ガス室に導入した排ガスを前記ろ布でろ過して清
澄ガスを前記清澄ガス室に導入する排ガス処理装置にお
いて、ガス中に含まれる有害成分を分解する反応速度を
促進する触媒を前記ろ布の内部に設けたことを特徴とす
る排ガス処理装置に関する。In order to achieve the above object, the present invention is configured as follows. That is,
This invention divides the inside of the treatment tower into a refining gas chamber and an untreated gas chamber with a partition plate, arranges a cylindrical filter cloth on the partition plate, and installs a gas pipe for supplying compressed gas into the inside of the filter cloth. In an exhaust gas treatment device that is provided and filters the exhaust gas introduced into the untreated gas chamber with the filter cloth to introduce a fining gas into the fining gas chamber, a catalyst that accelerates the reaction rate of decomposing harmful components contained in the gas Is provided inside the filter cloth.
【０００６】また、この排ガス処理装置は、前記触媒を
多段に設置すると共に、前記ガス配管を前記ろ布の底部
まで導き、前記圧縮ガスを供給するノズルを前記触媒同
士の間隙に設けたものである。Further, in this exhaust gas treating apparatus, the catalysts are installed in multiple stages, the gas pipes are led to the bottom of the filter cloth, and nozzles for supplying the compressed gas are provided in the gaps between the catalysts. is there.
【０００７】[0007]
【作用】この発明による排ガス処理装置は、上記のよう
に構成されているので、次のように作用する。即ち、こ
の排ガス処理装置において、未処理ガス室に導入された
排ガスは、ろ布を通過して清澄ガス室に導入される。排
ガスが前記ろ布を通過する時に、排ガス中に含まれるダ
スト、塩化水素、硫黄酸化物等は前記ろ布を通過するこ
とができず、前記ろ布の外面で捕獲され、次いで、その
排ガスが前記ろ布の内部に設けられた触媒を通過する時
に触媒に接触して窒素酸化物が還元反応して窒素酸化物
が除去される。このように、前記ろ布の表面でろ過され
た排ガスは、温度低下しないうちに触媒を通過すること
になるので、ガス中に含まれる有害成分、特に窒素酸化
物を分解する反応速度を促進して窒素酸化物の除去率を
高くすることができる。Since the exhaust gas treating apparatus according to the present invention is constructed as described above, it operates as follows. That is, in this exhaust gas treating apparatus, the exhaust gas introduced into the untreated gas chamber passes through the filter cloth and is introduced into the fining gas chamber. When the exhaust gas passes through the filter cloth, dust, hydrogen chloride, sulfur oxides and the like contained in the exhaust gas cannot pass through the filter cloth and are captured on the outer surface of the filter cloth, and then the exhaust gas is When passing through the catalyst provided inside the filter cloth, the nitrogen oxide is reduced by contacting with the catalyst and the nitrogen oxide is removed. As described above, the exhaust gas filtered on the surface of the filter cloth passes through the catalyst before the temperature lowers, and thus accelerates the reaction rate of decomposing harmful components contained in the gas, particularly nitrogen oxides. Therefore, the removal rate of nitrogen oxides can be increased.
【０００８】[0008]
【実施例】以下、図面を参照して、この発明による排ガ
ス処理装置の実施例を説明する。図１はこの発明による
排ガス処理装置の一実施例を示す概略図である。処理塔
１は内部を仕切板３で上下に二つのガス室に分割され、
下流側のガス室が清澄ガス室２１（図では上側）及び上
流側のガス室が未処理ガス室２０（図では下側）であ
る。未処理ガス室２０はその下部に排ガス入口８を、ま
た清澄ガス室２１はその上部に清澄ガス出口９を有して
いる。仕切板３には開口２２が設けられており、未処理
ガス室２０には開口２２を塞ぐ状態で、バグフィルタ等
の筒状ろ布２が吊り下げられている。処理塔１の外部に
は圧力タンク４が設けられ、圧力タンク４から清澄ガス
室２１の内部にガス配管６が延びており、ガス配管６に
設けられた圧縮ガスを吹き出す供給ノズル７が筒状のろ
布２の内部に向かって延びている。また、ガス配管６の
途中には電磁弁５が設けられている。この電磁弁５はエ
ア脈動を発生させ、供給ノズル７からダスト払い落とし
用の圧縮エアを間欠的にろ布２の内面に噴射させるため
のパルスバルブの機能を果たすものである。Embodiments of an exhaust gas treatment apparatus according to the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram showing an embodiment of an exhaust gas treating apparatus according to the present invention. The inside of the processing tower 1 is divided into two upper and lower gas chambers by a partition plate 3,
The downstream gas chamber is the refining gas chamber 21 (upper side in the figure) and the upstream gas chamber is the untreated gas chamber 20 (lower side in the figure). The untreated gas chamber 20 has an exhaust gas inlet 8 at its lower part, and the fining gas chamber 21 has a fining gas outlet 9 at its upper part. An opening 22 is provided in the partition plate 3, and a tubular filter cloth 2 such as a bag filter is suspended in the untreated gas chamber 20 in a state where the opening 22 is closed. A pressure tank 4 is provided outside the processing tower 1, a gas pipe 6 extends from the pressure tank 4 into the refining gas chamber 21, and a supply nozzle 7 that blows out a compressed gas provided in the gas pipe 6 is tubular. It extends toward the inside of the filter cloth 2. An electromagnetic valve 5 is provided in the middle of the gas pipe 6. The electromagnetic valve 5 functions as a pulse valve for generating air pulsation and intermittently injecting compressed air for dust removal from the supply nozzle 7 onto the inner surface of the filter cloth 2.
【０００９】この排ガス処理装置は、特に、ろ布２の内
部に触媒１０を設け、該触媒１１の作用でガス中に含ま
れる有害成分、特に窒素酸化物を分解する反応速度を促
進するものである。この排ガス処理装置には、例えば、
図２に示すように、水平方向にハニカム構造を有する円
筒形状に形成された触媒１０を使用することができ、該
触媒１０を図１に示すろ布２の内部に設置した場合に
は、排ガスは、円筒状の触媒１１の外側から内側に向か
ってハニカム構造の孔を通過し、その時、排ガスは触媒
１１に接触するようになる。排ガスが触媒１１に接触す
ることによって窒素酸化物を分解する反応速度を促進
し、該窒素酸化物を窒素ガスとうに分解するものであ
る。This exhaust gas treating apparatus is provided with a catalyst 10 inside the filter cloth 2 and accelerates the reaction rate of decomposing harmful components contained in the gas, especially nitrogen oxides, by the action of the catalyst 11. is there. In this exhaust gas treatment device, for example,
As shown in FIG. 2, it is possible to use a catalyst 10 formed into a cylindrical shape having a honeycomb structure in the horizontal direction. When the catalyst 10 is installed inside the filter cloth 2 shown in FIG. Passes through the holes of the honeycomb structure from the outside to the inside of the cylindrical catalyst 11, and the exhaust gas comes into contact with the catalyst 11 at that time. When the exhaust gas comes into contact with the catalyst 11, the reaction rate of decomposing nitrogen oxides is promoted, and the nitrogen oxides are decomposed into nitrogen gas.
【００１０】図５はこの発明による排ガス処理装置を用
いた処理フロー図である。焼却炉から排出された排ガス
１２は約８００℃の高温ガスであるが、図示しない空気
余熱器及びガス冷却器の働きで塩化水素の処理に適した
温度になるまで熱が回収される。そこで、排ガス１２は
約２４０℃以下の温度に下げられる。約２４０℃以下と
なった排ガス１２は、排ガス処理装置１５に流入する
が、その直前に消石灰添加装置１３から消石灰の粉末が
噴霧され、次いで、アンモニア添加装置１４からアンモ
ニアが添加される。FIG. 5 is a processing flow chart using the exhaust gas processing apparatus according to the present invention. Although the exhaust gas 12 discharged from the incinerator is a high temperature gas of about 800 ° C., heat is recovered until it reaches a temperature suitable for the treatment of hydrogen chloride by the functions of an air preheater and a gas cooler (not shown). Therefore, the exhaust gas 12 is lowered to a temperature of about 240 ° C. or lower. The exhaust gas 12 having a temperature of about 240 ° C. or less flows into the exhaust gas processing device 15, but immediately before that, the slaked lime powder is sprayed from the slaked lime addition device 13, and then ammonia is added from the ammonia addition device 14.
【００１１】排ガス中の酸性成分である塩化水素及び硫
黄酸化物は、消石灰添加装置１３で添加された消石灰及
びアンモニア添加装置１４で添加されたアンモニアガス
によって中和され、排ガス入口８から排ガス処理装置１
５即ち処理塔１の未処理ガス室２０に流入する。そし
て、排ガスが筒状のろ布２を外側から内側に向かって通
過する時、排ガス中のダスト等は、ろ布２の表面に付着
して除去される。また、排ガス中の塩化水素や硫黄酸化
物は勿論のこと、水銀やダイオキシンまでも同様にして
一部除去される。しかしながら、排ガス中に含まれてい
る窒素酸化物は、ろ布２を通過するだけでは除去されな
い。窒素酸化物を含み且つアンモニアが混合した排ガス
は、ろ布２内に設けられた脱硝用触媒１０に接触し、そ
れにより有害成分である窒素酸化物が分解して除去さ
れ、その窒素酸化物の濃度が低減する。このようにし
て、清浄化された排ガスはろ布２内を上昇して仕切板３
の開口２２から清澄ガス室２１に流入し、清澄ガス出口
９から排出される。有害成分を除去された排ガスは図示
しない誘引ファン等を経て、煙突から大気中へ排出され
る。Hydrogen chloride and sulfur oxides, which are acidic components in the exhaust gas, are neutralized by the slaked lime added by the slaked lime addition device 13 and the ammonia gas added by the ammonia addition device 14, and are discharged from the exhaust gas inlet 8 to the exhaust gas treatment device. 1
5 or the untreated gas chamber 20 of the treatment tower 1. Then, when the exhaust gas passes through the tubular filter cloth 2 from the outside toward the inside, dust and the like in the exhaust gas adhere to the surface of the filter cloth 2 and are removed. Further, not only hydrogen chloride and sulfur oxides in the exhaust gas but also mercury and dioxins are partially removed in the same manner. However, the nitrogen oxides contained in the exhaust gas are not removed only by passing through the filter cloth 2. The exhaust gas containing nitrogen oxides and mixed with ammonia contacts the denitration catalyst 10 provided in the filter cloth 2, whereby nitrogen oxides, which are harmful components, are decomposed and removed, and the nitrogen oxides The concentration is reduced. In this way, the purified exhaust gas rises in the filter cloth 2 and moves up to the partition plate 3
It flows into the refining gas chamber 21 through the opening 22 and is discharged from the refining gas outlet 9. The exhaust gas from which harmful components have been removed is discharged from the chimney into the atmosphere through an unillustrated attracting fan or the like.
【００１２】この排ガス処理装置は、図１に示す装置を
複数個併設して使用することもできる。その場合、電磁
弁５が同時に作動すると、排ガス処理装置全体としての
圧力損失の変動が極端に大きくなるので、有害成分の除
去性能が不安定になり、良好な除去率が得られない。そ
こで、排ガス処理装置全体の入口と出口の圧力差を検出
し、その検出値が所定の差圧値を超えた時に、一つの電
磁弁５だけを作動させ、圧力差が所定値を超えるごとに
電磁弁５を切り換えて順次作動させるようにするとよ
い。This exhaust gas treatment device can be used by installing a plurality of the devices shown in FIG. In that case, when the solenoid valves 5 are simultaneously operated, the fluctuation of the pressure loss of the entire exhaust gas treatment device becomes extremely large, so that the removal performance of harmful components becomes unstable and a good removal rate cannot be obtained. Therefore, the pressure difference between the inlet and the outlet of the entire exhaust gas treatment apparatus is detected, and when the detected value exceeds a predetermined differential pressure value, only one solenoid valve 5 is operated, and each time the pressure difference exceeds the predetermined value. It is advisable to switch the solenoid valves 5 to operate sequentially.
【００１３】上記実施例では、処理塔１内に一本のろ布
２を設けた場合について説明したが、この排ガス処理装
置では、処理塔１内に複数本のろ布２を設けてもよいも
のである。その場合には、排ガスに対する検出圧力差と
しては、処理塔１の排ガス入口８と清澄ガス出口９との
圧力差を検出することになる。In the above embodiment, the case where one filter cloth 2 is provided in the treatment tower 1 has been described, but in this exhaust gas treatment apparatus, a plurality of filter cloths 2 may be provided in the treatment tower 1. It is a thing. In that case, as the detected pressure difference with respect to the exhaust gas, the pressure difference between the exhaust gas inlet 8 and the fining gas outlet 9 of the processing tower 1 is detected.
【００１４】図４はこの発明による排ガス処理装置の他
の実施例を示す概略図である。この実施例では、排ガス
処理装置は図２に示す触媒１０の代わりに図３に示す触
媒１１をろ布２内に縦に複数個設置して多段構造とした
点、及びガス配管６をろ布２の底部まで延ばし、ダスト
払い落とし用の圧縮ガスを供給するノズル７を触媒１１
の下方の各々配置した点を除けば、図１に示した排ガス
処理装置と同一の構成を有している。例えば、図４では
処理塔１のろ布２内において触媒１１を３個設置してい
る。ガス配管６は清澄ガス室に水平方向に延びる水平部
分２４と水平部分２４から下方に延びる鉛直部分２５か
ら成り、ノズル７はガス配管６の鉛直部分２５からろ布
２の内面に垂直に向けられている。ノズル７から噴射さ
れる圧縮ガスは、触媒１１を設置していてもろ布２外面
に付着したダスト等を払い落とすことができる。FIG. 4 is a schematic view showing another embodiment of the exhaust gas treating apparatus according to the present invention. In this embodiment, the exhaust gas treating apparatus has a multistage structure in which a plurality of catalysts 11 shown in FIG. 3 are vertically installed in the filter cloth 2 instead of the catalyst 10 shown in FIG. 2, and the gas pipe 6 is a filter cloth. The nozzle 7 that extends to the bottom of the catalyst 2 and supplies the compressed gas for dust removal
1 has the same configuration as that of the exhaust gas treating apparatus shown in FIG. For example, in FIG. 4, three catalysts 11 are installed in the filter cloth 2 of the processing tower 1. The gas pipe 6 comprises a horizontal portion 24 extending horizontally in the refining gas chamber and a vertical portion 25 extending downward from the horizontal portion 24, and the nozzle 7 is oriented vertically from the vertical portion 25 of the gas pipe 6 to the inner surface of the filter cloth 2. ing. The compressed gas ejected from the nozzle 7 can remove dust and the like attached to the outer surface of the filter cloth 2 even if the catalyst 11 is installed.
【００１５】触媒１１は、図３に示すように、上端にフ
ランジ状の阻止板２３を有しており、阻止板２３の外周
縁がろ布２の内周面に接触しているので、排ガスは触媒
１１を必ず通過する。また、阻止板２３は上部の触媒１
１で清浄化された排ガスが下方へ逆流するのを防ぐ働き
がある。それぞれの触媒１１の中心には貫通孔１９が形
成されており、該貫通孔１９にガス配管６の鉛直部分２
５が挿通されている。ガス配管６の鉛直部分２５は水平
部分２４に対して着脱自在に固着されている。更に、鉛
直部分２５は、図３の場合に、３つの部分から構成され
ており、相互に着脱自在に連結されているので、触媒１
１の交換が可能になる。As shown in FIG. 3, the catalyst 11 has a flange-shaped blocking plate 23 at the upper end, and since the outer peripheral edge of the blocking plate 23 is in contact with the inner peripheral surface of the filter cloth 2, the exhaust gas is exhausted. Must pass through the catalyst 11. Further, the blocking plate 23 is the catalyst 1 on the upper side.
It has a function to prevent the exhaust gas cleaned in 1 from flowing backward. A through hole 19 is formed at the center of each catalyst 11, and the vertical portion 2 of the gas pipe 6 is formed in the through hole 19.
5 is inserted. The vertical portion 25 of the gas pipe 6 is detachably fixed to the horizontal portion 24. Further, in the case of FIG. 3, the vertical portion 25 is composed of three portions and is detachably connected to each other.
1 can be exchanged.
【００１６】次に、この発明による排ガス処理装置と従
来の排ガス処理装置とを使用して、表１に示す組成の排
ガスを処理した場合の比較試験の結果について、以下に
説明する。表１は排ガス処理試験に使用した排ガス中に
含まれる有害成分、即ち、ダスト、塩化水素、硫黄酸化
物及び窒素酸化物の各濃度を示している。表２はこの発
明による排ガス処理装置を使用して処理試験を行った試
験結果を示している。実験例１は、消石灰を酸性ガス
（塩化水素、硫黄酸化物）との当量比（反応に必要なモ
ル数に対する倍率）：２．５で添加し、アンモニアを窒
素酸化物との当量比：１で添加した例である。排ガス温
度が２２０℃の条件であれば、除去率は塩化水素で９０
％、硫黄酸化物でも７０％、窒素酸化物の除去率は９０
％であった。また、実施例２は排ガスの温度を２００℃
に下げた場合の例である。塩化水素の除去率は変化がな
いが、窒素酸化物の除去率が７０％に低下した。更に、
実験例３は消石灰のみ添加し、アンモニアの添加を行わ
なかった例である。窒素酸化物の除去効果は見られなか
った。Next, the results of a comparative test when treating the exhaust gas having the composition shown in Table 1 by using the exhaust gas treatment apparatus according to the present invention and the conventional exhaust gas treatment apparatus will be described below. Table 1 shows each concentration of harmful components, that is, dust, hydrogen chloride, sulfur oxides and nitrogen oxides contained in the exhaust gas used in the exhaust gas treatment test. Table 2 shows the test results of the treatment test using the exhaust gas treatment apparatus according to the present invention. In Experimental Example 1, slaked lime was added at an equivalent ratio with acidic gas (hydrogen chloride, sulfur oxide) (a ratio with respect to the number of moles necessary for the reaction): 2.5, and ammonia was added with an equivalent ratio with nitrogen oxide: 1 This is an example of adding in. If the exhaust gas temperature is 220 ° C, the removal rate is 90% with hydrogen chloride.
%, 70% even with sulfur oxides, 90% removal rate of nitrogen oxides
%Met. Further, in Example 2, the temperature of the exhaust gas is 200 ° C.
It is an example when it is lowered to. Although the hydrogen chloride removal rate did not change, the nitrogen oxide removal rate decreased to 70%. Furthermore,
Experimental Example 3 is an example in which only slaked lime was added and ammonia was not added. No effect of removing nitrogen oxide was observed.
【表１】 [Table 1]
【表２】 [Table 2]
【００１７】これに対し、従来の排ガス処理装置を使用
した場合、試験結果は表３に示すとおりであった。即
ち、表３は従来の排ガス処理装置を使用して処理試験を
行った試験結果を示している。排ガスの温度、薬品の添
加率の条件は実験例１と同じである。窒素酸化物の除去
率は７０％であって、実験例１の場合の９０％に比べて
低い。この理由は、窒素酸化物除去装置（脱消装置）１
８における排ガスの温度が、バグフィルタ装置１７にお
ける温度に比べて、バグフィルタ装置１７を通過した
後、自然放熱の結果、１０〜１５℃低下したからであ
る。On the other hand, when the conventional exhaust gas treating apparatus was used, the test results were as shown in Table 3. That is, Table 3 shows the test results obtained by performing the treatment test using the conventional exhaust gas treating apparatus. The conditions of the temperature of the exhaust gas and the addition rate of the chemicals are the same as in Experimental Example 1. The removal rate of nitrogen oxides is 70%, which is lower than 90% in the case of Experimental Example 1. The reason for this is that the nitrogen oxide removing device (deodorizing device) 1
This is because the temperature of the exhaust gas in 8 is 10 to 15 ° C. lower than the temperature in the bag filter device 17 as a result of natural heat dissipation after passing through the bag filter device 17.
【表３】 [Table 3]
【００１８】以上の試験結果からも分かるように、この
発明による排ガス処理装置を使用すると、窒素酸化物の
除去率が向上する。As can be seen from the above test results, the use of the exhaust gas treatment apparatus according to the present invention improves the removal rate of nitrogen oxides.
【００１９】[0019]
【発明の効果】この発明による排ガス処理装置は、上記
のように構成されているので、次のような効果を有す
る。この排ガス処理装置を用いれば、排ガス中に含まれ
ているダスト、塩化水素、硫黄酸化物、窒素酸化物が一
つの装置内でほとんど同時に除去可能となるので、装置
全体をコンパクトに小型化することができると共に、温
度条件等に関してより効果的な条件の下で処理すること
ができる。加えて、この排ガス処理装置では、ダスト払
い落とし用の圧縮ガスをろ布の内部に間欠的に供給する
ガス配管を設け、触媒の存在下でろ布外面に付着したダ
ストを払い落とすことができるので、装置自体を長期間
連続して排ガス処理を安定して行うことが可能となる。Since the exhaust gas treating apparatus according to the present invention is constructed as described above, it has the following effects. With this exhaust gas treatment device, dust, hydrogen chloride, sulfur oxides, and nitrogen oxides contained in the exhaust gas can be removed almost simultaneously in one device, so the entire device can be made compact and compact. In addition to the above, processing can be performed under more effective conditions such as temperature conditions. In addition, in this exhaust gas treatment device, a gas pipe for intermittently supplying the compressed gas for dust removal to the inside of the filter cloth is provided, and the dust attached to the outer surface of the filter cloth can be removed in the presence of the catalyst. Therefore, the apparatus itself can continuously perform exhaust gas treatment stably for a long period of time.
【図１】この発明による排ガス処理装置の一実施例を示
す概略説明図である。FIG. 1 is a schematic explanatory view showing an embodiment of an exhaust gas treating apparatus according to the present invention.
【図２】この排ガス処理装置に使用される触媒の構造の
一例を示す概略図である。FIG. 2 is a schematic view showing an example of the structure of a catalyst used in this exhaust gas treatment apparatus.
【図３】この排ガス処理装置に使用される触媒の構造の
別の例を示す概略図である。FIG. 3 is a schematic view showing another example of the structure of the catalyst used in this exhaust gas treatment apparatus.
【図４】この発明による排ガス処理装置の他の実施例を
示す概略説明図である。FIG. 4 is a schematic explanatory view showing another embodiment of the exhaust gas treating apparatus according to the present invention.
【図５】この発明による排ガス処理装置を用いた処理フ
ローを示す概略図である。FIG. 5 is a schematic diagram showing a processing flow using the exhaust gas processing apparatus according to the present invention.
【図６】従来の典型的な排ガス処理装置を示す概略図で
ある。FIG. 6 is a schematic diagram showing a conventional typical exhaust gas treatment device.
１ 処理塔 ２ ろ布 ３ 仕切板 ６ ガス配管 ７ 供給ノズル １０ 脱硝用触媒 １１ 脱硝用触媒 ２０ 未処理ガス室 ２１ 清澄ガス室 1 Processing Tower 2 Filter Cloth 3 Partition Plate 6 Gas Pipe 7 Supply Nozzle 10 DeNOx Catalyst 11 DeNOx Catalyst 20 Untreated Gas Room 21 Clearing Gas Room
Claims (2)
処理ガス室に分割し、該仕切板に筒状ろ布を配置し、圧
縮ガスを前記ろ布の内部に供給するガス配管を設け、前
記未処理ガス室に導入した排ガスを前記ろ布でろ過して
清澄ガスを前記清澄ガス室に導入する排ガス処理装置に
おいて、ガス中に含まれる有害成分を分解する反応速度
を促進する触媒を前記ろ布の内部に設けたことを特徴と
する排ガス処理装置。1. A gas pipe for dividing the inside of a processing tower into a refining gas chamber and an untreated gas chamber by a partition plate, arranging a cylindrical filter cloth on the partition plate, and supplying a compressed gas to the inside of the filter cloth. In the exhaust gas treatment apparatus for providing exhaust gas introduced into the untreated gas chamber with the filter cloth to introduce the refined gas into the refined gas chamber, the reaction rate of decomposing harmful components contained in the gas is promoted. An exhaust gas treatment device, wherein a catalyst is provided inside the filter cloth.
ガス配管を前記ろ布の底部まで導き、前記圧縮ガスを供
給するノズルを前記触媒同士の間隙に設けたことを特徴
とする請求項１に記載の排ガス処理装置。2. The catalysts are installed in multiple stages, the gas pipe is led to the bottom of the filter cloth, and a nozzle for supplying the compressed gas is provided in a gap between the catalysts. The exhaust gas treatment device according to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3119070A JPH0584411A (en) | 1991-04-24 | 1991-04-24 | Exhaust gas treating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3119070A JPH0584411A (en) | 1991-04-24 | 1991-04-24 | Exhaust gas treating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0584411A true JPH0584411A (en) | 1993-04-06 |
Family
ID=14752146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3119070A Pending JPH0584411A (en) | 1991-04-24 | 1991-04-24 | Exhaust gas treating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0584411A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6655185B2 (en) | 2000-02-09 | 2003-12-02 | Tateo Uegaki | Vehicle repairing device |
| CN104128091A (en) * | 2014-08-18 | 2014-11-05 | 上海迪扬过滤***有限公司 | Filter cartridge with denitration function and denitration method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55145520A (en) * | 1979-04-30 | 1980-11-13 | Babcock & Wilcox Co | Filter house and method for simultaneously removing nox and granular body from gas current |
| JPS61268332A (en) * | 1985-05-20 | 1986-11-27 | Asahi Glass Co Ltd | Dust removal purifying apparatus |
| JPS61283322A (en) * | 1985-06-10 | 1986-12-13 | Mitsubishi Heavy Ind Ltd | Apparatus for cleaning filter cloth |
-
1991
- 1991-04-24 JP JP3119070A patent/JPH0584411A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55145520A (en) * | 1979-04-30 | 1980-11-13 | Babcock & Wilcox Co | Filter house and method for simultaneously removing nox and granular body from gas current |
| JPS61268332A (en) * | 1985-05-20 | 1986-11-27 | Asahi Glass Co Ltd | Dust removal purifying apparatus |
| JPS61283322A (en) * | 1985-06-10 | 1986-12-13 | Mitsubishi Heavy Ind Ltd | Apparatus for cleaning filter cloth |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6655185B2 (en) | 2000-02-09 | 2003-12-02 | Tateo Uegaki | Vehicle repairing device |
| CN104128091A (en) * | 2014-08-18 | 2014-11-05 | 上海迪扬过滤***有限公司 | Filter cartridge with denitration function and denitration method |
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