JP3308065B2 - Nitrogen oxide and sulfur oxide purifying apparatus and its maintenance method - Google Patents
Nitrogen oxide and sulfur oxide purifying apparatus and its maintenance methodInfo
- Publication number
- JP3308065B2 JP3308065B2 JP23683793A JP23683793A JP3308065B2 JP 3308065 B2 JP3308065 B2 JP 3308065B2 JP 23683793 A JP23683793 A JP 23683793A JP 23683793 A JP23683793 A JP 23683793A JP 3308065 B2 JP3308065 B2 JP 3308065B2
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- Japan
- Prior art keywords
- absorbent
- layer
- dry
- purification
- absorbing
- Prior art date
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Classifications
-
- 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
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- Treating Waste Gases (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、窒素酸化物（ＮＯx）
および硫黄酸化物（ＳＯx)の浄化装置に関する。さらに
詳しくは、自動車道路トンネルの排ガス浄化をはじめ交
差点、特に密閉度の高い駐車場や交差点付近のビル内空
気浄化、ＮＯxとＳＯxを同時に扱う無機化学工場等の空
気浄化、特に脱硝装置として利用されるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to nitrogen oxides (NO x ).
And an apparatus for purifying sulfur oxides (SO x ). More particularly, the intersection including the exhaust gas purifying automobile road tunnels, particularly in an enclosed high degree of parking and intersections near the building air purification, air purification inorganic chemical plants, etc. to deal with simultaneous NO x and SO x, especially as denitrator It is used.
【０００２】[0002]
【従来の技術】近年、自動車から排出される窒素酸化物
や硫黄酸化物は、地域環境悪化や地球環境の破壊につな
がるところから、それらの発生を防いだり浄化したりす
る技術の開発が進められている。しかし、特に車社会が
発展していく中で、車、特にディーゼルエンジン車から
発生するＮＯxについては、発生後すぐに大気と混じっ
てしまい低濃度で大風量になることから、その浄化は困
難である。自動車道路トンネルは、ある程度密閉された
空間内に排気ガスが停滞するため、トンネル外より有害
ガス濃度が上昇する。このようなトンネルにおいては、
内部の有毒ガスの濃度が基準値を超えないように換気し
ているが、排気口からは通常大気の数十倍以上のＮＯx
とその１／１０程度のＳＯxが同時に排出される。最
近、都市部の地下を利用した自動車トンネルが計画され
ているが、トンネル内空気の排気場所も、もともと環境
の悪い場所であり、更なる環境の悪化が懸念され、排ガ
スの浄化装置が模索されている。2. Description of the Related Art In recent years, nitrogen oxides and sulfur oxides emitted from automobiles lead to the deterioration of the local environment and the destruction of the global environment. Therefore, the development of technologies for preventing or purifying them has been promoted. ing. However, especially in the car society evolves, car, especially for NO x generated from diesel engine vehicles, from becoming large air volume at low concentrations would be mixed with the atmosphere immediately after the occurrence, the purification is difficult It is. In an automobile road tunnel, since exhaust gas stagnates in a space sealed to some extent, the concentration of harmful gas increases from outside the tunnel. In such a tunnel,
Ventilation is performed so that the concentration of toxic gas inside does not exceed the standard value, but NO x which is several tens times or more of the atmospheric
And 1/10 approximately of the SO x are discharged simultaneously. Recently, a car tunnel using an underground in an urban area has been planned.However, the exhaust area of the air in the tunnel is originally a place with a bad environment, and there is a concern that the environment will deteriorate further. ing.
【０００３】従来、この種の浄化装置は特開平１−２２
４０３１号公報に見られるような脱硝装置が一般的であ
った。以下その構成について図７を参照しながら説明す
る。図７に示すように、ファン１５により引き込まれた
トンネル排ガス１１に含まれるＮＯxの主成分である一
酸化窒素（ＮＯ）および二酸化窒素（ＮＯ2）のうち、
ＮＯは酸化部においてＮＯ2に酸化される。この酸化に
よって得られたＮＯ2と、もともと存在していたＮＯ2の
両者は、吸収部１３に設置されたアルカリ性成分を含ん
だ乾式吸収剤層１４により吸収される。Conventionally, this type of purifying apparatus has been disclosed in Japanese Patent Laid-Open No. 1-222.
A denitration apparatus as disclosed in Japanese Patent No. 4031 is generally used. The configuration will be described below with reference to FIG. As shown in FIG. 7, among nitrogen monoxide (NO) and nitrogen dioxide (NO 2 ), which are the main components of NO x contained in the tunnel exhaust gas 11 drawn by the fan 15,
NO is oxidized to NO 2 in the oxidizing section. Both the NO 2 obtained by this oxidation and the originally existing NO 2 are absorbed by the dry absorbent layer 14 containing the alkaline component provided in the absorbing section 13.
【０００４】[0004]
【発明が解決しようとする課題】このような従来例に示
された脱硝装置により、実際のトンネル排ガスを浄化し
ようとすると、アルカリ性成分を含んだ乾式吸収剤の吸
収能力が大幅に低下する現象が見られる。たとえば、実
験室レベルの評価で調整されたサンプルガス（清浄エア
ー中にＮＯ2ガスを一定量混入されたもの）からのＮＯ2
吸収性能が１０ｍｇ／ｃｃ（吸収剤１ｃｃあたり１０ｍ
ｇのＮＯ2を吸収できるもの）あるものを、実際のトン
ネル排ガスで評価すると、１ｍｇ／ｃｃ以下になってし
まい、実使用にはほど遠い性能しか発揮できない。これ
は実排ガスにはＮＯxの他にＳＯxを始め各種の酸性ガス
成分が多く含まれているためで、これらのガス成分が吸
収剤の表面に吸着されると、吸収剤のもつＮＯ2浄化性
能が急激に低下するためである。ＳＯx成分はＮＯx成分
の１％であっても吸収剤の性能を大きく低下させる。When purifying actual tunnel exhaust gas by such a denitration apparatus shown in the prior art, the phenomenon that the absorption capacity of the dry absorbent containing an alkaline component is greatly reduced is caused. Can be seen. For example, NO 2 from laboratory sample gas adjusted in the evaluation of (those of NO 2 gas was constant amount mixed in clean air)
Absorption performance is 10mg / cc (10m / cc of absorbent)
g those NO 2 which can absorb) with the, as assessed in the actual tunnel exhaust gas, becomes below 1 mg / cc, the performance can only exert far from practical use. If this is because the actual exhaust gas that contains many other to start the SO x Various acid gas components NO x, these gas components are adsorbed on the surface of the absorbent, with the absorbent NO 2 This is because the purification performance sharply decreases. The SO x component, even at 1% of the NO x component, greatly reduces the performance of the absorbent.
【０００５】従って、本発明の第１の目的は、上記のよ
うなＳＯxの影響を考慮して、十分に実用化可能な窒素
酸化物および硫黄酸化物の浄化装置を提供することであ
る。本発明の第２の目的は、高性能な窒素酸化物および
硫黄酸化物の浄化性能を維持できるメンテナンス方法を
提供することである。Accordingly, a first object of the present invention, in consideration of the influence of the SO x as described above, is to provide a purification device sufficiently practical possible nitrogen oxides and sulfur oxides. A second object of the present invention is to provide a maintenance method capable of maintaining high performance of purifying nitrogen oxides and sulfur oxides.
【０００６】[0006]
【課題を解決するための手段】上記第１の目的を達成す
るための本発明の第１の技術手段は、酸化部においてＮ
ＯをＮＯ2に酸化するとともにＳＯ2や他の酸性ガスも酸
化して乾式吸収剤層に吸収され易くするとともに、吸収
部には少なくとも２層の独立した、石膏および活性炭粉
末からなる粒子にＫＯＨを吸収させてなる乾式吸収剤層
を設けることである。また、上記第２の目的を達成する
ための本発明の第２の技術手段は、浄化装置の性能を維
持するための吸収剤のメンテナンス方法として、再生さ
れた吸収剤もしくは新品吸収剤を吸収部の最風下層に設
置し、各層の吸収剤をそれぞれ１層ずつ風上側に移動
し、最風上層の吸収剤を取り出す操作を行うようにする
ことである。The first technical means of the present invention for attaining the first object is to provide an oxidizing section with N
O to thereby easily absorbed into the dry absorbent layer with SO 2 and other acid gases oxide with oxidized to NO 2, the absorption unit is independent of the at least two layers, gypsum and activated carbon powder
That is to provide a dry-type absorbent layer in which KOH is absorbed in particles made of powder. A second technical means of the present invention for achieving the second object is that a regenerated absorbent or a new absorbent is used as a maintenance method of the absorbent for maintaining the performance of the purification device. In this case, an operation is performed in which the absorbent of each layer is moved to the windward side by one layer, and the absorbent of the uppermost layer is taken out.
【０００７】[0007]
【作用】上記の技術手段によってＳＯxおよびその他の
酸性ガス成分は、乾式吸収剤層の風上側から第１層目で
吸収され、第２層目以後はその影響を受けずに十分な脱
硝性能を発揮することができる。本発明の装置は、酸化
部を有しており、ＳＯxおよび他の酸性ガス成分もＮＯ
と同様酸化され、第１層目の乾式吸収剤層でほぼ完全に
吸収される。吸収剤層の交換は同時に全てを交換せず、
最風上側の第１層を取り除き第２層目以降をそれぞれ１
層ずつ風上側に移動し、新しいもの、もしくは再生され
た乾式吸収剤を最風下側に挿入する。こうすることによ
ってほぼ十分にＮＯxを吸収した乾式吸収剤が風上側第
１層目に位置し、ＳＯx等の酸性ガスを吸収する役目を
果たし、第２層目以降が十分に高率よくＮＯxを吸収す
ることができる。SO x and other acid gas components by [action] The technical means is absorbed by the first layer from the windward side of the dry sorbent layer, the second layer after sufficient denitration performance without affected Can be demonstrated. The apparatus of the present invention has an oxidizing unit, and SO x and other acidic gas components are also NO.
And is almost completely absorbed in the first dry absorbent layer. Replacement of the absorbent layer does not replace all at the same time,
Remove the first layer on the windward side and remove the second and subsequent layers by 1
Move layer by layer to the windward side and insert a new or regenerated dry absorbent to the leeward side. Dry absorbent is positioned to the first-layer windward absorbing the NO x almost fully by doing so, serves to absorb the acid gases such as SO x, well high rate second and subsequent layers is sufficiently NO x can be absorbed.
【０００８】[0008]
【実施例】以下に、本発明の実施例について説明する。
本発明はこれら実施例のみに限定されるものではない。 ［実施例１］図１は本発明の浄化装置の一実施例を示
す。１０は浄化装置本体であり、ＮＯXおよびＳＯX、他
の酸性ガスを含んだ被浄化ガスは１１で示す矢印のよう
に浄化装置本体１０を通過する。１２は酸化部で、電極
板を用いた放電により酸化反応を起こさせるか、オゾン
を供給して酸化させる方式を用いる。酸化部１２の風下
側には吸収部１３が配してあり、それぞれ独立した３層
の乾式吸収剤層１４を設置した例を示している。１５は
被浄化ガスを駆動するファンで、ここでは本体の出口側
に設置したが、乾式吸収剤層の間や酸化部と吸収部の
間、装置本体の入り口に設置してもよい。Embodiments of the present invention will be described below.
The present invention is not limited to only these examples. [Embodiment 1] FIG. 1 shows an embodiment of the purification apparatus of the present invention. Reference numeral 10 denotes a purifying apparatus main body, and a gas to be purified containing NO X, SO X , and other acid gases passes through the purifying apparatus main body 10 as indicated by an arrow 11. Reference numeral 12 denotes an oxidizing unit that employs a method of causing an oxidizing reaction by discharge using an electrode plate or oxidizing by supplying ozone. An example is shown in which an absorbing section 13 is arranged on the leeward side of the oxidizing section 12, and three independent dry-type absorbent layers 14 are provided. Reference numeral 15 denotes a fan for driving the gas to be purified, which is installed at the outlet side of the main body, but may be installed at the entrance of the apparatus main body between the dry absorbent layers, between the oxidizing section and the absorbing section.
【０００９】上記構成の浄化装置において、酸化部ＮＯ
の９５％をＮＯ2に変換するようにオゾンを供給する。
また、吸収部は、活性炭粉末をセメント材の石膏により
硬化させた粒径１０ｍｍの粒子にＫＯＨを２０重量％吸
着させたものを乾式吸収剤とし、それぞれ独立した層の
吸収剤量は１００リットルとする。こうしてＮＯを２．
５ｐｐｍ、ＮＯ2を０．５ｐｐｍ、ＳＯ2を０．４ｐｐｍ
含む被浄化ガスを１，０００ｍ3／ｈの割合で上記浄化
装置に供給して窒素酸化物の浄化率を調べた。その結果
を図２に示す。Ａは乾式吸収剤層を３層設置した場合の
窒素酸化物浄化率を経過時間を横軸として示している。
Ｂは２層設置した場合、Ｃは比較のために実施した１層
のみ設置した場合を示している。なお、ＳＯ2はいずれ
の場合もほぼ１００％浄化された。図３は、ここで用い
た乾式吸収剤の性能を把握するために実施したテストの
結果を示すもので、条件は前記と同様であるが実際の排
ガスのかわりにＮＯxのみを含んだ調整されたエアーを
用いた。Ｄは１層設置時の性能、Ｅは２層設置時の性能
を示す。図４は、この調整されたエアーでのテストにＳ
Ｏ2を混ぜていった場合の評価結果である。乾式吸収剤
層が１層の場合の評価において、ＮＯx浄化率が５０％
を切るまでの時間とＳＯ2の混入量を比較してある。ほ
ぼＳＯ2混入量が０．０３ｐｐｍ（ＮＯx量のほぼ１％）
を超える時点から乾式吸収剤の性能が大きく劣化してい
る。図２〜４から明らかなように、ＳＯ2等の酸性ガス
を含んだ実際の排ガスで乾式吸収剤１層のみの設置では
大幅に性能が低下するが、２層以上を設置すると２層目
以降は本来のＮＯx浄化性能を発揮することができる。In the purification device having the above structure, the oxidizing section NO
Is supplied so as to convert 95% of NO to NO 2 .
In addition, the absorption section is a dry-type absorbent obtained by adsorbing 20% by weight of KOH on particles having a particle diameter of 10 mm obtained by hardening activated carbon powder with gypsum of a cement material. I do. Thus, NO
5 ppm, and NO 2 0.5 ppm, the SO 2 0.4 ppm
The gas to be purified was supplied to the purification apparatus at a rate of 1,000 m 3 / h, and the purification rate of nitrogen oxides was examined. The result is shown in FIG. A shows the nitrogen oxide purification rate when three dry absorbent layers are provided, with elapsed time plotted on the horizontal axis.
B shows the case where two layers are installed, and C shows the case where only one layer is installed for comparison. Incidentally, SO 2 was cleaned almost 100% in both cases. Figure 3 shows the results of tests were conducted to determine the performance of the dry absorbent used here, the condition is adjusted contained only NO x in place of the same in which although the actual exhaust gas Air was used. D shows the performance when one layer is installed, and E shows the performance when two layers are installed. FIG. 4 shows the test with this conditioned air
This is an evaluation result when O 2 is mixed. In the evaluation in the case of one dry absorbent layer, the NO x purification rate was 50%.
And the amount of SO 2 mixed therein are compared. Almost 0.03 ppm of SO 2 mixed (almost 1% of NO x amount)
The performance of the dry-type absorbent has significantly deteriorated from the point in time when it exceeds. As is clear from FIGS. 2 to 4, the performance of the actual exhaust gas containing an acid gas such as SO 2 and the like is greatly reduced when only one layer of the dry absorbent is provided, but when two or more layers are provided, the second and subsequent layers are provided. Can exhibit the original NO x purification performance.
【００１０】［実施例２］図５は浄化装置のメンテナン
スの実施例を示す。図５（ａ）の２１、２２、２３はそ
れぞれ独立した乾式吸収剤層を示す。それぞれの乾式吸
収剤層が未使用の状態で排ガス浄化をスタートし、浄化
率が一定値を下回ったとき最風上側の第１層である２１
を取り出し、２２、２３をそれぞれ風上側に移動し未使
用の２４を最風下側に挿入した状態を（ｂ）に示してい
る。（ｃ）、（ｄ）は、同様に浄化率が一定値を下回っ
たときに、順次未使用または再生した吸収剤層２５、２
６を追加して同様のメンテナンスを実施していくことを
示している。なお、吸収剤層の再生方法としては、前記
の粒子を水洗した後、ＫＯＨを吸着させる方法がある。
図６は本実施例によって得られた評価結果を示す。評価
条件は実施例１と同じ実排ガスを用いている。メンテナ
ンスは装置の浄化率が５０％を切ったときに実施した。
ａは評価スタート時の結果で、図５（ａ）の状態のとき
の浄化率推移を示す。ｂは図５（ｂ）、ｃは図５
（ｃ）、ｄは図５（ｄ）の時の浄化推移を示す。ｂ〜ｆ
に示すように、それぞれのメンテナンス後の特性は、新
しく設置された乾式吸収剤層が十分に特性を発揮してい
る。[Embodiment 2] FIG. 5 shows an embodiment of maintenance of a purifying apparatus. Reference numerals 21, 22, and 23 in FIG. 5A denote independent dry-type absorbent layers. Exhaust gas purification is started in a state where each dry absorbent layer is not used, and when the purification rate falls below a certain value, the first layer 21 on the uppermost wind side is used.
(B) shows a state in which 22 and 23 are respectively moved to the windward side and the unused 24 is inserted to the downwind side. (C) and (d) show that the absorbent layers 25, 2 which have been used or regenerated one after another when the purification rate falls below a certain value.
6 indicates that similar maintenance will be performed. As a method for regenerating the absorbent layer, there is a method in which the particles are washed with water and then KOH is adsorbed.
FIG. 6 shows the evaluation results obtained by this example. The same actual exhaust gas as in Example 1 was used for the evaluation conditions. Maintenance was performed when the purification rate of the device fell below 50%.
a shows the result at the time of the start of the evaluation, and shows the change in the purification rate in the state of FIG. b is FIG. 5 (b), c is FIG.
(C) and (d) show the purification transition at the time of FIG. 5 (d). b to f
As shown in (1), the characteristics after the maintenance are fully exhibited by the newly installed dry absorbent layer.
【００１１】［比較例］図８はそれぞれ独立した乾式吸
収剤層を３層設置しているが、浄化率が一定値以下にな
ったとき３層同時に交換する方法で性能を評価した結果
を示している。図８（ａ）で浄化試験をスタートし、浄
化率が一定値を下回ったとき（ｂ）に示すように、３
１、３２、３３の乾式吸収剤層を全て取り除き、新しく
未使用の乾式吸収剤層３４、３５、３６を設置する。
（ｃ）も同様に新しい吸収剤層３７、３８、３９を設置
したものである。図９は浄化率が５０％を切ったときに
乾式吸収剤層を入れ替える方法で評価を実施した結果を
示す。ｇは図８（ａ）の状態、ｈは図８（ｂ）の状態、
ｉは図８（ｃ）の状態の時の浄化率の推移を示す。[Comparative Example] FIG. 8 shows the results of evaluating the performance of a method in which three independent dry-type absorbent layers are installed, but when the purification rate falls below a certain value, the three layers are simultaneously replaced. ing. When the purification test is started in FIG. 8A and the purification rate falls below a certain value, as shown in FIG.
All of the dry absorbent layers 1, 32 and 33 are removed, and new unused dry absorbent layers 34, 35 and 36 are installed.
(C) similarly has new absorbent layers 37, 38, 39 installed. FIG. 9 shows the results of the evaluation performed by replacing the dry absorbent layer when the purification rate falls below 50%. g is the state of FIG. 8A, h is the state of FIG.
i shows the transition of the purification rate in the state of FIG.
【００１２】[0012]
【発明の効果】以上のように本発明の２層以上の乾式吸
収剤層を有する窒素酸化物および硫黄酸化物浄化装置
は、乾式吸収剤のもつＮＯx浄化性能をＳＯxや他の酸性
ガス成分を有する実排ガスにおいても十分に発揮するこ
とができる。また、本発明のメンテナンス方法は、本発
明の実施例２（図６）と比較例（図９）を比較すること
でその優位性が明らかになっている。すなわち図６と図
９で未使用の３層からスタートし１回目のメンテナンス
時点（ともにＰ1点）はほぼ同じ時間であるが、初期設
置された３層が全て取り替えられた時点の浄化率５０％
の点は、比較例の図９Ｐ2点が６７０時間程度であるの
に対して、実施例２の図６のＰ4点は８３０時間程度ま
で浄化率を維持している。すなわち、乾式吸収剤の交換
量を大幅に削減できることを示している。以上のよう
に、本発明によれば、実用化可能な窒素酸化物および硫
黄酸化物浄化装置を提供できる。As described above, the nitrogen oxide and sulfur oxide purifying apparatus having two or more dry absorbent layers of the present invention can reduce the NO x purification performance of the dry absorbent to SO x or other acidic gas. The effect can be sufficiently exhibited even in actual exhaust gas having the component. Further, the superiority of the maintenance method of the present invention has been clarified by comparing Example 2 (FIG. 6) of the present invention with Comparative Example (FIG. 9). I.e. starting from 3 layers of unused FIGS. 6 and 9 first maintenance time (both P 1 point) is almost the same time, the purification rate at which three layers are initially installed has been replaced every 50 %
The points, whereas FIG. 9P 2 points of the comparative example is about 670 hours, P 4 points 6 of Example 2 has maintained purification rate up to about 830 hours. That is, it shows that the replacement amount of the dry absorbent can be significantly reduced. As described above, according to the present invention, it is possible to provide a nitrogen oxide and sulfur oxide purifying apparatus that can be put to practical use.
【図１】本発明の第１実施例の窒素酸化物および硫黄酸
化物浄化装置の構成を示す縦断面略図である。FIG. 1 is a schematic vertical sectional view showing a configuration of a nitrogen oxide and sulfur oxide purifying apparatus according to a first embodiment of the present invention.
【図２】本発明の第１実施例の浄化装置によるＮＯx浄
化率を従来例と比較して示す図である。FIG. 2 is a diagram showing a NO x purification rate by a purification device of a first embodiment of the present invention in comparison with a conventional example.
【図３】実施例に用いた吸収剤の性能を示す図である。FIG. 3 is a graph showing the performance of an absorbent used in an example.
【図４】被浄化ガス中のＳＯx濃度とＮＯx浄化性能との
関係を示す図である。FIG. 4 is a diagram showing the relationship between the SO x concentration in the gas to be purified and the NO x purification performance.
【図５】本発明の第２実施例における浄化装置の乾式吸
収剤層のメンテナンスの手順を示す図である。FIG. 5 is a diagram showing a procedure of maintenance of a dry-type absorbent layer of a purification device according to a second embodiment of the present invention.
【図６】本発明の第２実施例の浄化装置による性能を示
す図である。FIG. 6 is a diagram showing the performance of a purification device according to a second embodiment of the present invention.
【図７】従来の脱硝装置の構成を示す縦断面略図であ
る。FIG. 7 is a schematic vertical sectional view showing a configuration of a conventional denitration apparatus.
【図８】比較例における浄化装置の乾式吸収剤層のメン
テナンス手順を示す図である。FIG. 8 is a diagram showing a maintenance procedure of a dry absorbent layer of a purification device in a comparative example.
【図９】比較例の装置による性能を示す図である。FIG. 9 is a diagram showing performance by a device of a comparative example.
１０ 浄化装置本体 １１ ガスの流れ １２ 酸化部 １３ 吸収部 １４ 乾式吸収剤層 １５ ファン ２１〜２６ 乾式吸収剤層 DESCRIPTION OF SYMBOLS 10 Purification apparatus main body 11 Gas flow 12 Oxidation part 13 Absorption part 14 Dry-type absorbent layer 15 Fan 21-26 Dry-type absorbent layer
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平１−176450（ＪＰ，Ａ) 特開 平２−268829（ＪＰ，Ａ) 特開 平１−155934（ＪＰ，Ａ) 特開 昭50−123571（ＪＰ，Ａ) 特開 平１−296000（ＪＰ，Ａ) 特開 平１−224031（ＪＰ，Ａ) 特表 昭57−501564（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-176450 (JP, A) JP-A-2-268829 (JP, A) JP-A-1-155934 (JP, A) JP-A-50- 123571 (JP, A) JP-A-1-296000 (JP, A) JP-A-1-224031 (JP, A) JP-T-57-501564 (JP, A)
Claims (2)
化ガスを酸化する酸化部と、 石膏および活性炭粉末からなる粒子にＫＯＨを吸収させ
てなる乾式吸収剤からなり、前記酸化部において酸化さ
れた二酸化窒素を含む酸性ガスを吸収する吸収部とを具
備し、 前記吸収部が少なくとも２層の独立した吸収剤層を有
し、第１層目で主として硫黄酸化物を吸着させ、第２層
目以降で主として窒素酸化物を吸着させる窒素酸化物お
よび硫黄酸化物を含む被浄化ガスの浄化装置。1. An oxidizing section for oxidizing a gas to be purified containing nitrogen oxides and sulfur oxides, and a dry-type absorbent obtained by absorbing KOH into particles made of gypsum and activated carbon powder, and oxidized in the oxidizing section. An absorbing section for absorbing an acidic gas containing nitrogen dioxide, wherein the absorbing section has at least two independent absorbent layers.
The first layer mainly adsorbs sulfur oxides and the second layer
Nitrogen oxides Ru is mainly adsorbing nitrogen oxides in the subsequent eyes and purification apparatus for the purification target gas containing sulfur oxides.
吸収剤を前記吸収部の最風下層に設置し、各乾式吸収剤
をそれぞれ１層ずつ風上側に移動し、主として硫黄酸化
物を吸着させた最風上層の乾式吸収剤を取り出し廃棄ま
たは再生する請求項１記載の浄化装置のメンテナンス方
法。2. A regenerated dry absorbent or a new dry absorbent is installed in the lowermost layer of the absorbing section, and each dry absorbent is moved one layer at a time to the windward side, and mainly sulfur oxidation is performed.
The maintenance method for a purification apparatus according to claim 1, wherein the uppermost layer of the dry absorbent to which the substance is adsorbed is taken out and discarded or regenerated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23683793A JP3308065B2 (en) | 1993-09-22 | 1993-09-22 | Nitrogen oxide and sulfur oxide purifying apparatus and its maintenance method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23683793A JP3308065B2 (en) | 1993-09-22 | 1993-09-22 | Nitrogen oxide and sulfur oxide purifying apparatus and its maintenance method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0788328A JPH0788328A (en) | 1995-04-04 |
| JP3308065B2 true JP3308065B2 (en) | 2002-07-29 |
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ID=17006526
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23683793A Expired - Fee Related JP3308065B2 (en) | 1993-09-22 | 1993-09-22 | Nitrogen oxide and sulfur oxide purifying apparatus and its maintenance method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006150207A (en) * | 2004-11-29 | 2006-06-15 | Mitsubishi Heavy Ind Ltd | Washing solution for nitrogen oxide absorbent, and washing method and regeneration method of nitrogen oxide absorbent using it |
| JP2009095801A (en) * | 2007-10-18 | 2009-05-07 | Toshiba Corp | NOx PURIFYING APPARATUS IN NORMAL-TEMPERATURE GAS |
| CN111375303B (en) * | 2019-12-24 | 2020-11-06 | 广州澳企实验室技术股份有限公司 | Environment-friendly machine for removing chemical gaseous pollutants in laboratory air |
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| Publication number | Publication date |
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| JPH0788328A (en) | 1995-04-04 |
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