JP2002284510A - Method for recovering sulfuric acid of waste gas treatment system and device for recovering sulfuric acid - Google Patents
Method for recovering sulfuric acid of waste gas treatment system and device for recovering sulfuric acidInfo
- Publication number
- JP2002284510A JP2002284510A JP2001090637A JP2001090637A JP2002284510A JP 2002284510 A JP2002284510 A JP 2002284510A JP 2001090637 A JP2001090637 A JP 2001090637A JP 2001090637 A JP2001090637 A JP 2001090637A JP 2002284510 A JP2002284510 A JP 2002284510A
- Authority
- JP
- Japan
- Prior art keywords
- sulfuric acid
- activated carbon
- exhaust gas
- based adsorbent
- desorbed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
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- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排ガスを炭素系吸
着材に通すことで排ガス中の硫黄分を当該炭素系吸着材
で吸着し脱硫する脱硫装置と、この脱硫装置から取り出
される炭素系吸着材を加熱して再生する炭素系吸着材再
生装置と、を備える排ガス処理システムに適用される硫
酸回収方法及び硫酸回収装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a desulfurization device for adsorbing sulfur in exhaust gas by passing the exhaust gas through a carbon-based adsorbent and desulfurizing the carbon-based adsorbent, and a carbon-based adsorbent taken out from the desulfurization device. TECHNICAL FIELD The present invention relates to a sulfuric acid recovery method and a sulfuric acid recovery device applied to an exhaust gas treatment system including a carbon-based adsorbent regeneration device that regenerates by heating a material.
【０００２】[0002]
【従来の技術】例えば、ボイラ、廃棄物焼却炉等からの
排ガスを脱硫する排ガス処理システムが知られている。
この排ガス処理システムは、脱硫装置としての活性炭吸
着塔と、この活性炭吸着塔の活性炭の吸着能力を回復す
べく再生する再生塔と、を備え、排ガスを、活性炭吸着
塔の活性炭に通すことで排ガス中の硫黄分を当該活性炭
で吸着して脱硫し後段に供する一方で、活性炭吸着塔の
活性炭を取り出して再生塔で加熱し再生し当該活性炭吸
着塔に戻す構成とされている。2. Description of the Related Art For example, an exhaust gas treatment system for desulfurizing exhaust gas from a boiler, a waste incinerator or the like is known.
This exhaust gas treatment system includes an activated carbon adsorption tower as a desulfurization device, and a regeneration tower that regenerates the activated carbon adsorption tower in order to restore the ability of the activated carbon to adsorb the activated carbon. While the sulfur content therein is adsorbed by the activated carbon and desulfurized and supplied to the subsequent stage, the activated carbon of the activated carbon adsorption tower is taken out, heated in a regeneration tower, regenerated, and returned to the activated carbon adsorption tower.
【０００３】ここで、再生塔で活性炭を加熱再生する
と、活性炭からＳＯ2が脱離するため、このＳＯ2を主体
に含む脱離ガスを処理すべく、排ガス処理システムに
は、脱離ガスから硫酸を副生品として回収する硫酸回収
装置が付設されている。Here, when activated carbon is regenerated by heating in a regeneration tower, SO 2 is desorbed from the activated carbon. Therefore, in order to treat the desorbed gas mainly containing SO 2 , an exhaust gas treatment system includes A sulfuric acid recovery device for recovering sulfuric acid as a by-product is provided.
【０００４】この硫酸回収装置は、洗浄塔、転化塔、吸
収塔、硫酸回収タンクをこの順に備え、再生塔からの脱
離ガスを洗浄塔で洗浄し、この洗浄された脱離ガスを、
転化塔で加熱して脱離ガス中のＳＯ2をＳＯ3に転化し、
このＳＯ3を、吸収塔で硫酸とし硫酸回収タンクに回収
するというものである。This sulfuric acid recovery apparatus is provided with a washing tower, a conversion tower, an absorption tower, and a sulfuric acid recovery tank in this order. The desorbed gas from the regeneration tower is washed by the washing tower, and the washed desorbed gas is removed.
Heating in a conversion tower to convert SO 2 in the desorbed gas to SO 3 ,
This SO 3 is converted into sulfuric acid in an absorption tower and recovered in a sulfuric acid recovery tank.
【０００５】[0005]
【発明が解決しようとする課題】ここで、上記硫酸回収
装置にあっては、起動時に転化塔で加熱を完了させるこ
と、脱離ガス中のＳＯ2と水分とが規定濃度になること
（脱離ガス中の水分が製造硫酸（９８％Ｈ2ＳＯ4−２％
Ｈ2Ｏ）必要量より少ないこと）という二つの条件を満
たす必要があり、この二つの条件が整うのに時間的なズ
レが生じると、種硫酸の濃度が薄く腐食性を持った取り
扱いが難しい硫酸となってしまう。また、転化塔では、
転化反応に必要なＯ2を大気から取り入れるため、脱離
ガス中のＳＯ2濃度が低いと大気中の水分により硫酸が
薄くなってしまい、水分濃度の調整が非常に難しい。こ
のように、従来の硫酸回収装置で所望の硫酸を回収する
にあたっては、その回収のプロセスが複雑で難しいとい
った問題があった。Here, in the above-mentioned sulfuric acid recovery apparatus, it is necessary to complete the heating in the conversion tower at the time of start-up, and to make the concentration of SO 2 and moisture in the desorbed gas to a specified concentration. Moisture in the degassing gas is produced sulfuric acid (98% H 2 SO 4 -2%
H 2 O) must two satisfy the condition that less that) than the required amount, the time lag for these two conditions are complete occurs, is difficult to handle the concentration of species sulfate with thin corrosive It becomes sulfuric acid. In the conversion tower,
Since O 2 required for the conversion reaction is taken in from the atmosphere, if the SO 2 concentration in the desorbed gas is low, the sulfuric acid becomes thin due to the moisture in the atmosphere, and it is very difficult to adjust the moisture concentration. As described above, when a desired sulfuric acid is recovered by a conventional sulfuric acid recovery apparatus, there is a problem that the recovery process is complicated and difficult.
【０００６】また、上記硫酸回収装置では、洗浄塔、転
化塔、吸収塔、硫酸回収タンクを備えることから、構成
要素が多いと共に大きな設置領域が必要であり、設備コ
ストが高くなるといった問題もある。In addition, since the above-mentioned sulfuric acid recovery apparatus is provided with a washing tower, a conversion tower, an absorption tower, and a sulfuric acid recovery tank, it has many components and requires a large installation area, so that there is a problem that equipment costs are increased. .
【０００７】本発明は、このような課題を解決するため
に成されたものであり、硫酸の回収が容易とされると共
に設備コストが低減される排ガス処理システムの硫酸回
収方法及び硫酸回収装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a sulfuric acid recovery method and a sulfuric acid recovery apparatus for an exhaust gas treatment system in which the recovery of sulfuric acid is facilitated and the equipment cost is reduced. The purpose is to provide.
【０００８】[0008]
【課題を解決するための手段】本発明による排ガス処理
システムの硫酸回収方法は、排ガスを炭素系吸着材に通
すことで排ガス中の硫黄分を当該炭素系吸着材で吸着し
脱硫する脱硫装置と、この脱硫装置から取り出される炭
素系吸着材を加熱して再生する炭素系吸着材再生装置
と、を備える排ガス処理システムに適用される硫酸回収
方法であって、炭素系吸着材再生装置による炭素系吸着
材の加熱の際に当該炭素系吸着材から脱離するＳＯ2を
含む脱離ガスを冷却し、この冷却した脱離ガスを活性炭
繊維充填層に通すことで硫酸を回収することを特徴とし
ている。According to the present invention, there is provided a sulfuric acid recovery method for an exhaust gas treatment system according to the present invention, comprising: a desulfurization apparatus for passing a waste gas through a carbon-based adsorbent to adsorb sulfur contained in the exhaust gas with the carbon-based adsorbent to desulfurize the sulfur component; A carbon-based adsorbent regenerating apparatus for heating and regenerating the carbon-based adsorbent taken out of the desulfurization apparatus, and a sulfuric acid recovery method applied to an exhaust gas treatment system comprising: The method is characterized in that the desorbed gas containing SO 2 desorbed from the carbon-based adsorbent when the adsorbent is heated is cooled, and the cooled desorbed gas is passed through an activated carbon fiber packed bed to recover sulfuric acid. I have.
【０００９】このような排ガス処理システムの硫酸回収
方法によれば、炭素系吸着材から脱離したＳＯ2を含む
脱離ガスが例えば常温程度迄冷却されて活性炭繊維充填
層に通されると、脱離ガス中のＳＯ2は、活性炭繊維充
填層の表面の酸化活性点に吸着し、脱離ガス中のＯ2に
より酸化されてＳＯ3となり、脱離ガス中の水分と反応
して硫酸の生成が起こり、この硫酸の水への吸収と活性
炭繊維充填層の表面からの脱離が起こって回収される。
この回収の際には、脱離ガス中の水分が活性炭繊維に凝
縮しても、ＳＯ2の吸着が阻害されることなく生成硫酸
の脱離が促進される。このため、水分調整を始めとした
硫酸の回収プロセスが従来に比して簡略化されると共
に、装置が簡略化され且つ省領域化される。According to the sulfuric acid recovery method of such an exhaust gas treatment system, when the desorbed gas containing SO 2 desorbed from the carbon-based adsorbent is cooled to, for example, about room temperature and passed through the activated carbon fiber packed bed, SO 2 in the desorbed gas is adsorbed to the oxidizing active sites on the surface of the activated carbon fiber packed bed, is oxidized by O 2 in the desorbed gas to SO 3 , and reacts with water in the desorbed gas to form sulfuric acid. Formation occurs, and the sulfuric acid is absorbed into water and desorbed from the surface of the activated carbon fiber packed bed, and collected.
In this recovery, even if the moisture in the desorbed gas condenses on the activated carbon fibers, the desorption of the generated sulfuric acid is promoted without inhibiting the adsorption of SO 2 . For this reason, the process for recovering sulfuric acid, including the adjustment of water content, is simplified as compared with the conventional process, and the apparatus is simplified and the area is reduced.
【００１０】ここで、脱離ガスを、洗浄装置で水冷洗浄
してから活性炭繊維充填層に通すようにすれば、脱離ガ
スが、洗浄されると同時に常温程度迄水冷されるため、
硫酸を回収するのに好適な脱離ガスとして活性炭繊維充
填層に通されるようになる。Here, if the desorbed gas is washed with water in a cleaning device and then passed through the activated carbon fiber packed bed, the desorbed gas is washed and water-cooled to about room temperature at the same time.
As a desorbing gas suitable for recovering sulfuric acid, the gas is passed through the activated carbon fiber packed bed.
【００１１】また、本発明による排ガス処理システムの
硫酸回収装置は、排ガスを炭素系吸着材に通すことで排
ガス中の硫黄分を当該炭素系吸着材で吸着し脱硫する脱
硫装置と、この脱硫装置から取り出される炭素系吸着材
を加熱して再生する炭素系吸着材再生装置と、を備える
排ガス処理システムに適用される硫酸回収装置であっ
て、炭素系吸着材再生装置による炭素系吸着材の加熱の
際に当該炭素系吸着材から脱離するＳＯ2を含む脱離ガ
スを、水冷洗浄する洗浄装置と、この水冷洗浄された脱
離ガスが通過する活性炭繊維充填層と、この活性炭繊維
充填層で生成されて当該活性炭繊維充填層から脱離する
硫酸を回収する硫酸回収槽と、を備えることを特徴とし
ている。Further, the sulfuric acid recovery apparatus of the exhaust gas treatment system according to the present invention is a desulfurization apparatus for passing the exhaust gas through a carbon-based adsorbent to adsorb and desulfurize sulfur in the exhaust gas with the carbon-based adsorbent, and the desulfurization apparatus. And a carbon-based adsorbent regenerating apparatus for heating and regenerating the carbon-based adsorbent taken out of the fuel cell. A washing device for water-cooling the desorbed gas containing SO 2 desorbed from the carbon-based adsorbent at the time of the cleaning, an activated carbon fiber packed layer through which the water-cooled desorbed gas passes, and an activated carbon fiber packed layer And a sulfuric acid recovery tank for recovering sulfuric acid generated in the above and released from the activated carbon fiber packed bed.
【００１２】このように構成された排ガス処理システム
の硫酸回収装置によれば、上記硫酸回収方法が効果的に
実施される。According to the sulfuric acid recovery apparatus of the exhaust gas treatment system configured as described above, the above-described sulfuric acid recovery method is effectively performed.
【００１３】[0013]
【発明の実施の形態】以下、本発明に係る排ガス処理シ
ステムの硫酸回収方法及び硫酸回収装置の好適な実施形
態について添付図面を参照しながら説明する。図１は、
本発明による排ガス処理システムを示す概略構成図であ
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a sulfuric acid recovery method and a sulfuric acid recovery apparatus for an exhaust gas treatment system according to the present invention will be described below with reference to the accompanying drawings. FIG.
1 is a schematic configuration diagram illustrating an exhaust gas treatment system according to the present invention.
【００１４】図１に示すように、排ガス処理システム１
は、排ガスラインＬ１に接続されて排ガスが導入される
バグフィルタ２と、このバグフィルタ２に排ガスライン
Ｌ２を介して接続されてバグフィルタ２からの排ガスが
導入される活性炭吸着塔３と、この活性炭吸着塔３にガ
スラインＬ３を介して接続されて活性炭吸着塔３からの
ガスを大気に放出する煙突４と、この上流側のバグフィ
ルタ２から下流側の煙突４に向かうガスの流れを形成す
べく排ガスラインＬ２に配設される吸引ファン７と、を
備えると共に、排ガスラインＬ１を流れる排ガスに消石
灰を供給する消石灰供給装置５と、排ガスラインＬ２を
流れる排ガスにＮＨ3を供給するＮＨ3供給装置６と、を
備え、前段のバグフィルタ２で、導入される排ガスを除
塵すると共に、消石灰と排ガス中のＨＣｌ、ＳＯXとの
反応生成物を捕集することで脱塩、脱硫し、後段の活性
炭吸着塔３の活性炭（炭素系吸着材）で、導入される排
ガス中のＳＯXを、硫酸やこの硫酸とＮＨ3との反応生成
物としてのアンモニウム塩の形で吸着して脱硫すると共
に、排ガス中のＮＯXを、活性炭触媒作用によりＮＨ3と
反応させて還元分解して脱硝し、同時に、排ガス中のダ
イオキシンを吸着して脱ダイオキシンとし、実質的に無
害なガスとして煙突４から放出する。As shown in FIG. 1, an exhaust gas treatment system 1
A bag filter 2 connected to the exhaust gas line L1 to introduce exhaust gas; an activated carbon adsorption tower 3 connected to the bag filter 2 via the exhaust gas line L2 to introduce exhaust gas from the bag filter 2; A chimney 4 connected to the activated carbon adsorption tower 3 via a gas line L3 to discharge gas from the activated carbon adsorption tower 3 to the atmosphere, and forms a gas flow from the upstream bag filter 2 to the downstream chimney 4 A suction fan 7 disposed on the exhaust gas line L2 to supply slaked lime to the exhaust gas flowing through the exhaust gas line L1, and NH 3 supplying NH 3 to the exhaust gas flowing through the exhaust gas line L2. a supply device 6 includes a collecting in front of the bag filter 2, as well as dust and exhaust gas introduced, HCl of slaked lime and the flue gas, the reaction product of SO X Desalted Rukoto, desulfurized, ammonium of activated carbon for subsequent activated carbon adsorption tower 3 (carbonaceous adsorbent), the SO X in the exhaust gas to be introduced, as a reaction product of sulfuric acid and the sulfuric acid and NH 3 with desulfurization by adsorption in the form of a salt, the NO X in the exhaust gas, and reductive decomposition is reacted with NH 3 and NOx removal by activated carbon catalysis simultaneously adsorbs dioxins in the exhaust gas as a de-dioxin, substantially It is released from the chimney 4 as a chemically harmless gas.
【００１５】上記活性炭吸着塔３は、収容する活性炭を
底部の出口３ｂから取り出すと共に上部の入口３ａから
後述の再生済みの活性炭を導入することで活性炭が上部
から底部に向かって移動する活性炭移動層を備え、この
活性炭移動層に排ガスが接触することで、上記脱硫、脱
硝、脱ダイオキシンを可能としている。In the activated carbon adsorption tower 3, an activated carbon moving bed in which the activated carbon contained is taken out from the bottom outlet 3b and regenerated activated carbon described later is introduced from the upper inlet 3a so that the activated carbon moves from the top to the bottom. The desulfurization, denitration, and dioxin removal are enabled by contacting the exhaust gas with the activated carbon moving bed.
【００１６】この活性炭吸着塔３に対しては、当該活性
炭吸着塔３の活性炭を再生する再生塔（炭素系吸着材再
生装置）８が接続されている。The activated carbon adsorption tower 3 is connected to a regeneration tower (carbon-based adsorbent regeneration apparatus) 8 for regenerating the activated carbon of the activated carbon adsorption tower 3.
【００１７】この再生塔８は、活性炭吸着塔３の底部の
出口３ｂから取り出される活性炭をラインＬ４を介して
上部の入口８ａから導入すると共に底部の出口８ｂから
活性炭を取り出すことで活性炭が上部から底部に向かっ
て移動する活性炭移動層を備え、この活性炭移動層の移
動に伴い当該活性炭移動層を４００°Ｃ程度に加熱する
ことで、活性炭からＳＯ2を脱離させて活性炭を再生
し、底部の出口８ｂから再生済みの活性炭を取り出しラ
インＬ５を介して上記活性炭吸着塔３の上部の入口３ａ
に戻す構成とされている。In the regeneration tower 8, the activated carbon taken out of the outlet 3b at the bottom of the activated carbon adsorption tower 3 is introduced from the upper inlet 8a via the line L4, and the activated carbon is taken out from the outlet 8b at the bottom. An activated carbon moving layer that moves toward the bottom is provided, and the activated carbon moving layer is heated to about 400 ° C. with the movement of the activated carbon moving layer, thereby desorbing SO 2 from the activated carbon to regenerate the activated carbon. Activated carbon that has been regenerated is taken out from the outlet 8b of the reactor 3 and the inlet 3a at the top of the activated carbon adsorption tower 3 is taken out via the line L5.
It is configured to return to.
【００１８】この再生塔８に対しては、活性炭再生の際
に当該活性炭から脱離するＳＯ2を主体に含む脱離ガス
から、硫酸を副生品として回収する硫酸回収装置９が接
続されている。Connected to the regeneration tower 8 is a sulfuric acid recovery device 9 for recovering sulfuric acid as a by-product from a desorbed gas mainly containing SO 2 which is desorbed from the activated carbon during regeneration of the activated carbon. I have.
【００１９】この硫酸回収装置９は、本実施形態の特徴
を成すもので、洗浄塔（洗浄装置）１０、活性炭繊維収
容体１１、硫酸回収槽１２をこの順に備える。The sulfuric acid recovery apparatus 9 is a feature of the present embodiment, and includes a cleaning tower (cleaning apparatus) 10, an activated carbon fiber container 11, and a sulfuric acid recovery tank 12 in this order.
【００２０】洗浄塔１０は、再生塔８からラインＬ６を
介して導入される脱離ガスを水洗浄し当該脱離ガスを常
温程度迄水冷する。In the washing tower 10, the desorbed gas introduced from the regeneration tower 8 via the line L6 is washed with water, and the desorbed gas is cooled with water to about room temperature.
【００２１】活性炭繊維収容体１１は、太さ１０μｍ程
度、表面に２×１０-9ｍ以下のミクロポアが発達してい
る活性炭繊維を充填して成る活性炭繊維充填層１１ａを
収容したもので、洗浄塔１０からラインＬ７を介して導
入される常温程度の脱離ガスを、活性炭繊維充填層１１
ａに通過させる。The activated carbon fiber container 11 contains an activated carbon fiber filled layer 11a formed by filling activated carbon fibers having a thickness of about 10 μm and having micropores of 2 × 10 −9 m or less on the surface. The desorbed gas at about room temperature introduced from the tower 10 via the line L7 is passed through the activated carbon fiber packed bed 11
a.
【００２２】このような構成を有する硫酸回収装置９に
よれば、再生塔８からのＳＯ2を含む脱離ガスは、洗浄
塔１０で水洗浄され、粉塵等が洗い落とされて清浄化さ
れると共に常温程度迄水冷され、この常温程度の脱離ガ
スは、活性炭繊維収容体１１に流入し、活性炭繊維充填
層１１ａを通過する。この常温程度の脱離ガスは、ＳＯ
2の他にＯ2、水、ＣＯ2等を含んでいる。According to the sulfuric acid recovery apparatus 9 having such a configuration, the desorbed gas containing SO 2 from the regeneration tower 8 is washed with water in the washing tower 10, and dust and the like are washed off and cleaned. At the same time, the degassed gas at about normal temperature flows into the activated carbon fiber container 11 and passes through the activated carbon fiber packed layer 11a. The desorbed gas at about room temperature is
In addition to O 2 of 2, water, contains CO 2 and the like.
【００２３】この脱離ガスの活性炭繊維充填層１１ａの
通過に伴い、脱離ガス中のＳＯ2は、活性炭繊維充填層
１１ａの表面の酸化活性点に吸着し、脱離ガス中のＯ2
により常温酸化されてＳＯ3となる。次いで、脱離ガス
中の水分と反応して硫酸の生成が起こり、最後に、硫酸
の水への吸収と活性炭繊維充填層１１ａの表面からの脱
離が起こる。この際に、脱離ガス中の水分が活性炭繊維
に凝縮しても、ＳＯ2の吸着が阻害されることなく生成
硫酸の脱離が促進される。このため、水分調整が従来に
比して簡易とされている。As the desorbed gas passes through the activated carbon fiber packed bed 11a, SO 2 in the desorbed gas is adsorbed on the oxidizing active sites on the surface of the activated carbon fiber packed bed 11a, and O 2 in the desorbed gas is removed.
At room temperature to form SO 3 . Next, sulfuric acid is generated by reacting with the moisture in the desorbed gas, and finally, sulfuric acid is absorbed into water and desorbed from the surface of the activated carbon fiber packed layer 11a. At this time, even if the moisture in the desorbed gas condenses on the activated carbon fibers, the desorption of the generated sulfuric acid is promoted without inhibiting the adsorption of SO 2 . For this reason, the adjustment of water content is simpler than in the past.
【００２４】そして、この脱離した硫酸は、硫酸回収槽
１２に回収され、一方、回収されない硫酸を含むガス
は、ラインＬ９を介して活性炭吸着塔３の上流に戻され
上記と同様な処理に供される。The sulfuric acid thus desorbed is recovered in the sulfuric acid recovery tank 12, while the gas containing sulfuric acid that is not recovered is returned to the upstream of the activated carbon adsorption tower 3 via the line L9 and subjected to the same treatment as described above. Provided.
【００２５】このように、本実施形態においては、活性
炭吸着塔３の活性炭を再生塔８で加熱して再生する際
に、当該活性炭から脱離するＳＯ2を含む脱離ガスを常
温程度迄冷却して活性炭繊維充填層１１ａに通すことで
硫酸を回収するようにしているため、水分調整を始めと
した硫酸の回収プロセスが従来に比して簡略化されると
共に、装置が簡略化され且つ省領域化されている。この
ため、硫酸の回収を容易とすると共に設備コストを低減
するのが可能とされている。As described above, in the present embodiment, when the activated carbon in the activated carbon adsorption tower 3 is heated and regenerated in the regeneration tower 8, the desorbed gas containing SO 2 desorbed from the activated carbon is cooled to about room temperature. Then, the sulfuric acid is recovered by passing it through the activated carbon fiber packed bed 11a, so that the process of recovering sulfuric acid, including the adjustment of water content, is simplified as compared with the conventional one, and the apparatus is simplified and saved. It has been domainized. For this reason, it is possible to facilitate the recovery of sulfuric acid and reduce the equipment cost.
【００２６】以上、本発明をその実施形態に基づき具体
的に説明したが、本発明は上記実施形態に限定されるも
のではなく、例えば、活性炭繊維収容体１１と硫酸回収
槽１２との間に蒸留塔を配設し、この蒸留塔で、活性炭
繊維充填層１１ａから脱離する硫酸を蒸留し濃硫酸とし
て回収することも可能である。As described above, the present invention has been specifically described based on the embodiment. However, the present invention is not limited to the above-described embodiment. For example, the structure between the activated carbon fiber container 11 and the sulfuric acid recovery tank 12 may be used. It is also possible to arrange a distillation column, and distill sulfuric acid desorbed from the activated carbon fiber packed bed 11a in this distillation column and collect it as concentrated sulfuric acid.
【００２７】また、上記実施形態においては、活性炭を
備えて排ガスを脱硫、脱硝、脱ダイオキシンとする活性
炭吸着塔３と、この活性炭吸着塔３から取り出された活
性炭を加熱して再生する再生塔８と、を備えているが、
炭素系吸着材を備えて排ガス中の硫黄分を当該炭素系吸
着材で吸着して脱硫する脱硫装置と、この脱硫装置から
取り出された炭素系吸着材を加熱して再生する炭素系吸
着材再生装置と、を備える排ガス処理システムに対して
適用可能である。Further, in the above embodiment, the activated carbon adsorption tower 3 provided with activated carbon to desulfurize, denitrate, and remove dioxin from exhaust gas, and the regeneration tower 8 for heating and regenerating the activated carbon taken out from the activated carbon adsorption tower 3 And
A desulfurization device that includes a carbon-based adsorbent and adsorbs sulfur in exhaust gas with the carbon-based adsorbent to desulfurize the carbon-based adsorbent, and regenerates the carbon-based adsorbent by heating the carbon-based adsorbent removed from the desulfurization device. And an apparatus for exhaust gas treatment comprising the same.
【００２８】[0028]
【発明の効果】本発明による排ガス処理システムの硫酸
回収方法及び硫酸回収装置は、脱硫装置の炭素系吸着材
を炭素系吸着材再生装置で加熱して再生する際に、当該
炭素系吸着材から脱離するＳＯ2を含む脱離ガスを例え
ば常温程度迄冷却して活性炭繊維充填層に通すことで硫
酸を回収するようにしているため、水分調整を始めとし
た硫酸の回収プロセスが従来に比して簡略化されると共
に、装置が簡略化され且つ省領域化される。このため、
硫酸の回収を容易とすると共に設備コストを低減するの
が可能となる。The sulfuric acid recovery method and the sulfuric acid recovery device of the exhaust gas treatment system according to the present invention are used when the carbon-based adsorbent of the desulfurization device is heated and regenerated by the carbon-based adsorbent regenerating device. Since the desorbed gas containing desorbed SO 2 is cooled to, for example, about room temperature and passed through an activated carbon fiber packed bed, sulfuric acid is recovered. And the device is simplified and the area is reduced. For this reason,
This facilitates the recovery of sulfuric acid and reduces equipment costs.
【図１】本発明による排ガス処理システムを示す構成図
である。FIG. 1 is a configuration diagram showing an exhaust gas treatment system according to the present invention.
１…排ガス処理システム、３…活性炭吸着塔（脱硫装
置）、８…再生塔（炭素系吸着材再生装置）、９…硫酸
回収装置、１０…洗浄塔（洗浄装置）、１１…活性炭繊
維収容体、１１ａ…活性炭繊維充填層、１２…硫酸回収
槽。DESCRIPTION OF SYMBOLS 1 ... Exhaust gas treatment system, 3 ... Activated carbon adsorption tower (desulfurization apparatus), 8 ... Regeneration tower (carbon-based adsorbent regeneration apparatus), 9 ... Sulfuric acid recovery apparatus, 10 ... Washing tower (washing apparatus), 11 ... Activated carbon fiber container , 11a: activated carbon fiber packed bed, 12: sulfuric acid recovery tank.
Claims (3)
ス中の硫黄分を当該炭素系吸着材で吸着し脱硫する脱硫
装置と、この脱硫装置から取り出される前記炭素系吸着
材を加熱して再生する炭素系吸着材再生装置と、を備え
る排ガス処理システムに適用される硫酸回収方法であっ
て、 前記炭素系吸着材再生装置による前記炭素系吸着材の加
熱の際に当該炭素系吸着材から脱離するＳＯ2を含む脱
離ガスを冷却し、 この冷却した脱離ガスを活性炭繊維充填層に通すことで
硫酸を回収することを特徴とする排ガス処理システムの
硫酸回収方法。1. A desulfurization device that adsorbs sulfur in exhaust gas by passing the exhaust gas through the carbon-based adsorbent and desulfurizes the carbon-based adsorbent, and heats the carbon-based adsorbent taken out of the desulfurization device by heating the carbon-based adsorbent. And a carbon-based adsorbent regenerating device for regenerating the sulfuric acid applied to an exhaust gas treatment system, comprising: A sulfuric acid recovery method for an exhaust gas treatment system, comprising: cooling a desorbed gas containing desorbed SO 2 and passing the cooled desorbed gas through an activated carbon fiber packed bed to recover sulfuric acid.
てから前記活性炭繊維充填層に通すことを特徴とする請
求項１記載の排ガス処理システムの硫酸回収方法。2. The method for recovering sulfuric acid in an exhaust gas treatment system according to claim 1, wherein the desorbed gas is washed with water in a washing device and then passed through the activated carbon fiber packed bed.
ス中の硫黄分を当該炭素系吸着材で吸着し脱硫する脱硫
装置と、この脱硫装置から取り出される前記炭素系吸着
材を加熱して再生する炭素系吸着材再生装置と、を備え
る排ガス処理システムに適用される硫酸回収装置であっ
て、 前記炭素系吸着材再生装置による前記炭素系吸着材の加
熱の際に当該炭素系吸着材から脱離するＳＯ2を含む脱
離ガスを、水冷洗浄する洗浄装置と、 この水冷洗浄された脱離ガスが通過する活性炭繊維充填
層と、 この活性炭繊維充填層で生成されて当該活性炭繊維充填
層から脱離する硫酸を回収する硫酸回収槽と、を備える
ことを特徴とする排ガス処理システムの硫酸回収装置。3. A desulfurization apparatus for adsorbing sulfur in the exhaust gas by passing the exhaust gas through the carbon-based adsorbent and desulfurizing the carbon-based adsorbent, and heating the carbon-based adsorbent removed from the desulfurization apparatus. A sulfuric acid recovery device applied to an exhaust gas treatment system comprising: a carbon-based adsorbent regeneration device that regenerates the carbon-based adsorbent. A cleaning device for water-cooling the desorbed gas containing SO 2 to be desorbed, an activated carbon fiber packed layer through which the water-cooled desorbed gas passes, and an activated carbon fiber packed layer generated by the activated carbon fiber packed layer And a sulfuric acid recovery tank for recovering sulfuric acid desorbed from the sulfuric acid.
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Cited By (6)
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| KR101039715B1 (en) | 2009-01-23 | 2011-06-13 | 엘에스니꼬동제련 주식회사 | Method of Treating a By-product Gas from Copper Smelting |
| JP2013173106A (en) * | 2012-02-27 | 2013-09-05 | Taiheiyo Cement Corp | Method and device for recovering mercury in exhaust gas |
| JP2014171986A (en) * | 2013-03-11 | 2014-09-22 | Taiheiyo Cement Corp | Method for recovering mercury in exhaust gas |
| CN106178813A (en) * | 2016-07-08 | 2016-12-07 | 中山市道享节能技术服务有限公司 | A kind of coal high-efficiency clean utilization system based on activated coke dry FGD process technology |
| CN113082946A (en) * | 2021-04-08 | 2021-07-09 | 成都达奇环境科技有限公司 | Method for treating waste gas from non-ferrous metal smelting |
| CN113731101A (en) * | 2020-05-28 | 2021-12-03 | 中冶长天国际工程有限责任公司 | Waste incineration flue gas treatment system and flue gas treatment method based on activated carbon separation and analysis |
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| CN113731101A (en) * | 2020-05-28 | 2021-12-03 | 中冶长天国际工程有限责任公司 | Waste incineration flue gas treatment system and flue gas treatment method based on activated carbon separation and analysis |
| CN113731101B (en) * | 2020-05-28 | 2023-06-23 | 中冶长天国际工程有限责任公司 | Garbage incineration flue gas treatment system and flue gas treatment method based on activated carbon separation and analysis |
| CN113082946A (en) * | 2021-04-08 | 2021-07-09 | 成都达奇环境科技有限公司 | Method for treating waste gas from non-ferrous metal smelting |
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