JP2001104748A - Method of and apparatus for removing selenium from waste gas - Google Patents
Method of and apparatus for removing selenium from waste gasInfo
- Publication number
- JP2001104748A JP2001104748A JP28835099A JP28835099A JP2001104748A JP 2001104748 A JP2001104748 A JP 2001104748A JP 28835099 A JP28835099 A JP 28835099A JP 28835099 A JP28835099 A JP 28835099A JP 2001104748 A JP2001104748 A JP 2001104748A
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- Japan
- Prior art keywords
- selenium
- exhaust gas
- component
- adsorbent
- heating furnace
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、排ガス中のセレン
除去方法および除去装置に係り、特に、ボイラ等の燃焼
装置から排出される排ガス中の二酸化セレン（Ｓｅ
Ｏ2 ）を除去するのに好適な、排ガス中のセレン除去方
法および除去装置に関する。The present invention relates to a method and an apparatus for removing selenium from exhaust gas, and more particularly to a method and apparatus for removing selenium dioxide (Se) from exhaust gas discharged from a combustion device such as a boiler.
The present invention relates to a method and an apparatus for removing selenium in exhaust gas, which are suitable for removing O 2 ).
【０００２】[0002]
【従来の技術】火力発電所等において、石炭などの化石
燃料の燃焼に伴って発生する排煙中にはセレンが含まれ
ており、含有量はそれ程多くないが、その毒性の強さか
ら、処理技術の確立が望まれている。なお、セレンは排
ガス中で、主としてＳｅＯ2 等の酸化物として存在す
る。従来の典型的な排煙処理システムは、ボイラの排ガ
ス煙道に設けられた排煙脱硝装置の後流に排ガス中のば
い塵を除去する集じん装置および硫黄酸化物（ＳＯｘ）
を除去する脱硫装置が設置されており、前記脱硫装置
は、例えば石灰石−石膏法による湿式脱硫法が主流とな
っていた。2. Description of the Related Art In a thermal power plant or the like, selenium is contained in flue gas generated by the burning of fossil fuels such as coal, and the content thereof is not so large. Establishment of processing technology is desired. Note that selenium exists mainly in the exhaust gas as an oxide such as SeO 2 . Conventional typical flue gas treatment systems include a dust collector and a sulfur oxide (SOx) for removing dust in flue gas after a flue gas denitration device provided in a flue gas flue of a boiler.
A desulfurization apparatus for removing limestone is installed, and for the desulfurization apparatus, for example, a wet desulfurization method using a limestone-gypsum method has been mainly used.
【０００３】図１１は、従来の排煙処理システムを示す
説明図である。図１１において、この装置は、ボイラ１
と、該ボイラ１の排ガス煙道に順次設けられた脱硝装置
２、エアヒータ（Ａ／Ｈ）３、ガス−ガスヒータ（ＧＧ
Ｈ）の熱回収部４、電気集じん器（ＥＰ）５、脱硫装置
６、ガス−ガスヒータ（ＧＧＨ）の再加熱部７および煙
突８と、前記電気集じん器５に連結されたばい塵Ｂの溶
解装置１２と、前記脱硫装置６に順次連結された脱水機
９、還元装置１０および沈殿装置１１とから主として構
成されている。FIG. 11 is an explanatory view showing a conventional flue gas treatment system. In FIG. 11, this device is a boiler 1
And a denitration device 2, an air heater (A / H) 3, and a gas-gas heater (GG) sequentially provided in an exhaust gas stack of the boiler 1.
H) a heat recovery unit 4, an electric precipitator (EP) 5, a desulfurizer 6, a reheating unit 7 and a chimney 8 of a gas-gas heater (GGH), and a dust B connected to the electric precipitator 5. And a dehydrator 9, a reducing device 10, and a sedimentation device 11, which are sequentially connected to the desulfurization device 6.
【０００４】ボイラ１から排出される排ガスＡは、脱硝
装置２で排ガス中のＮＯｘが除去されたのち、エアヒー
タ（Ａ／Ｈ）３およびガス−ガスヒータ（ＧＧＨ）の熱
回収部４を経てＥＰ５に流入し、ここで排ガスＡ中のば
い塵Ｂが除去される。ＥＰ５で除去されなかった一部の
ばい塵を含む排ガスＡは、脱硫装置６に流入し、ここで
ＳＯ2 が除去され、ＧＧＨの再加熱部７で加熱されたの
ち、煙突８から大気に放出される。排ガスＡに含まれる
セレン成分は、ＥＰ５で回収された、灰粒子を主成分と
するばい塵Ｂの表面に付着するか、または脱硫装置６内
で噴霧される脱硫吸収液で捕集される。セレン成分を捕
集した脱硫吸収液は脱水機９で石膏Ｃが分離されたの
ち、ばい塵Ｂを溶解した溶解装置１２から流出する溶解
液と共に、後流の還元装置１０に流入し、ここで液中の
セレンが沈殿し易い形態に還元される。還元されたセレ
ンは後流の沈殿装置１１に流入し、ここで、例えば凝集
剤が添加されて凝集し、セレンを含むスラッジＤとして
回収される。[0004] Exhaust gas A discharged from the boiler 1 is subjected to a NOx removal device 2 to remove NOx in the exhaust gas, and then passed through an air heater (A / H) 3 and a heat recovery unit 4 of a gas-gas heater (GGH) to an EP 5. Then, the dust B in the exhaust gas A is removed. Exhaust gas A containing a portion of the soot and dust that was not removed by EP5 flows into the desulfurization device 6, wherein SO 2 is removed, after being heated in the reheating section 7 of GGH, released from chimney 8 to the atmosphere Is done. The selenium component contained in the exhaust gas A adheres to the surface of the dust B mainly containing ash particles collected in EP5, or is collected by a desulfurization absorbing liquid sprayed in the desulfurization device 6. After the gypsum C is separated by the dehydrator 9, the desulfurization absorbing liquid having collected the selenium component flows into the downstream reducing device 10 together with the dissolving solution flowing out of the dissolving device 12 in which the dust B is dissolved. Selenium in the liquid is reduced to a form that easily precipitates. The reduced selenium flows into the downstream sedimentation device 11, where, for example, a coagulant is added to coagulate and is recovered as sludge D containing selenium.
【０００５】排ガス中のセレン成分が分離、回収される
詳細なメカニズムや反応条件は必ずしも明らかではない
が、排ガスＡに含まれるセレンの化学形態は二酸化セレ
ン（ＣｅＯ2 ）であり、ばい塵Ｂに付着した、または
脱硫吸収液に捕集されたＣｅＯ2 の一部は酸化されて三
酸化セレン（ＳｅＯ3）となり、液中ではその大部分が
セレン酸（Ｈ2 ＳｅＯ4 ）として存在するものと考えら
れる。特に、排ガスＡ中のＳＯ2 を吸収することによっ
て生成する亜硫酸を酸化するために吸収液中に空気が吹
き込まれる脱硫装置の前記脱硫吸収液に捕集されたセレ
ンは、前記空気によって酸化されて６価のセレン（Ｈ2
ＳｅＯ4 ）になり易いと考えられる。６価のセレン（Ｈ
2 ＳｅＯ4 ）は溶解度が高く、これを液中から沈殿除去
することは非常に困難である。従って、溶液中のセレン
成分を分離するために、上述したように従来から、前記
セレン酸（Ｈ2 ＳｅＯ4）を含む溶液を還元装置１０に
導入して６価のセレン（Ｈ2 ＳｅＯ4 ）を沈殿し易い４
価のセレン（亜セレン酸：Ｈ2 ＳｅＯ3）に還元し、こ
れを沈殿装置１１で沈殿させ、セレン含有スラッジＤと
して回収しているものと考えられる。なお、前記セレン
（６価）の還元方法としては、例えば特開平６−７９２
８６号公報のような硫酸鉄等の化学物質を用いる方法、
例えば特開平９−２２４６５６号公報等の生物で還元す
る方法が挙げられる。Although the detailed mechanism and reaction conditions for separating and recovering the selenium component in the exhaust gas are not always clear, the chemical form of selenium contained in the exhaust gas A is selenium dioxide (CeO 2 ), Part of the CeO 2 adhered or collected in the desulfurization absorption liquid is oxidized to selenium trioxide (SeO 3 ), and most of it is present as selenic acid (H 2 SeO 4 ) in the liquid. Conceivable. In particular, selenium air into the absorption liquid is collected in the desulfurization absorbing liquid of the desulfurization apparatus blown to oxidize the sulfite to generate by absorbing SO 2 in flue gas A is oxidized by the air Hexavalent selenium (H 2
(SeO 4 ). Hexavalent selenium (H
2 SeO 4 ) has a high solubility, and it is very difficult to remove it from the solution by precipitation. Therefore, in order to separate the selenium component in the solution, a solution containing the above-described selenic acid (H 2 SeO 4 ) is conventionally introduced into the reducing device 10 to separate hexavalent selenium (H 2 SeO 4 ) as described above. Easy to settle 4
It is considered that the selenium is reduced to monovalent selenium (selenous acid: H 2 SeO 3 ), which is precipitated in the precipitation apparatus 11 and recovered as selenium-containing sludge D. The method for reducing selenium (hexavalent) is described in, for example, JP-A-6-792.
No. 86, a method using a chemical substance such as iron sulfate,
For example, there is a method of reduction with a living organism as disclosed in JP-A-9-224656.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら上記従来
技術は、ばい塵に付着したセレン成分および脱硫吸収液
に溶解したセレン成分を順次後流の還元装置および沈殿
装置で処理していたために、該還元装置および沈殿装置
における処理液中のセレン濃度が低くかつ処理液量が大
量であるために、処理効率が悪く、処理コストが嵩むと
いう問題があった。本発明の課題は、上記従来技術の問
題点を解決し、排ガス中のセレンを効率よく捕集、回収
して前記排ガスから除去することができる、排ガス中の
セレン除去方法および除去装置を提供することにある。However, in the above-mentioned prior art, the selenium component adhering to the dust and the selenium component dissolved in the desulfurization absorbing solution were sequentially treated in a downstream reduction device and a sedimentation device. Since the concentration of selenium in the processing liquid in the apparatus and the precipitation apparatus is low and the amount of the processing liquid is large, there is a problem that the processing efficiency is poor and the processing cost is increased. An object of the present invention is to provide a method and an apparatus for removing selenium in exhaust gas, which can solve the above-mentioned problems of the prior art and efficiently collect, collect, and remove selenium in exhaust gas from the exhaust gas. It is in.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するた
め、本願で特許請求する発明は以下のとおりである。 （１）セレン成分を含む排ガスを酸化チタンを主成分と
する吸着材に接触させ、前記セレン成分を吸着除去する
ことを特徴とする排ガス中のセレンの除去方法。 （２）前記吸着材が、成形体である上記（１）に記載の
方法。 （３）前記吸着材が、粉末またはスラリ状である上記
（１）に記載の方法。 （４）前記吸着材と接触させる排ガス温度が、２００℃
以下であることを特徴とする上記（１）〜（３）の何れ
かに記載の方法。 （５）前記セレン成分を吸着した吸着材の温度を高めて
吸着しているセレン成分を離脱させたのち、再度排ガス
と接触させることを特徴とする上記（１）〜（４）の何
れかに記載の排ガス中のセレン除去方法。Means for Solving the Problems To solve the above problems, the invention claimed in the present application is as follows. (1) A method for removing selenium from exhaust gas, comprising contacting an exhaust gas containing a selenium component with an adsorbent containing titanium oxide as a main component to adsorb and remove the selenium component. (2) The method according to the above (1), wherein the adsorbent is a molded body. (3) The method according to the above (1), wherein the adsorbent is in the form of powder or slurry. (4) The temperature of the exhaust gas brought into contact with the adsorbent is 200 ° C.
The method according to any one of the above (1) to (3), wherein: (5) The method according to any one of the above (1) to (4), wherein the temperature of the adsorbent that has adsorbed the selenium component is increased to desorb the adsorbed selenium component, and then contact the exhaust gas again. The method for removing selenium in exhaust gas as described in the above.
【０００８】（６）前記セレン成分を離脱させる際の排
ガス温度が、３００℃以上であることを特徴とする上記
（５）に記載の方法。 （７）前記吸着材から離脱したセレン成分を含むガスを
水と接触させて前記セレン成分を回収することを特徴と
する上記（５）または（６）に記載の方法。 （８）排ガス煙道に隣設された加熱炉と、該加熱炉と前
記排ガス煙道との間に設けられた回転軸を中心にして前
記排ガス煙道および加熱炉を横切って回転して前記排ガ
ス煙道内でセレン成分を吸着して前記加熱炉内で離脱さ
せる円盤状の吸着材と、前記離脱したセレン成分を水で
吸収するセレン回収手段とを有することを特徴とする排
ガス中のセレン除去装置。(6) The method according to the above (5), wherein the temperature of the exhaust gas at the time of releasing the selenium component is 300 ° C. or higher. (7) The method according to the above (5) or (6), wherein the gas containing the selenium component released from the adsorbent is brought into contact with water to recover the selenium component. (8) a heating furnace provided adjacent to the exhaust gas flue, and rotating around the rotation axis provided between the heating furnace and the exhaust gas flue to traverse the exhaust gas flue and the heating furnace, Selenium removal from exhaust gas, comprising: a disc-shaped adsorbent for adsorbing selenium components in an exhaust gas flue and desorbing in the heating furnace; and selenium recovery means for absorbing the desorbed selenium components with water. apparatus.
【０００９】（９）排ガスの入口および出口を有する吸
着塔本体と、該吸着塔本体の天井部分に設けられた吸着
材の噴霧ノズルおよび底部に設けられた吸着材貯蔵部
と、該吸収材貯留部と前記噴霧ノズルとを連結する連結
配管と、前記噴霧ノズルで噴射され、セレン含有排ガス
と接触してセレン成分を吸着した吸着材を加熱して前記
セレン成分を離脱させる加熱炉と、離脱したセレン成分
を水で吸収するセレン回収手段とを有することを特徴と
する排ガス中のセレン除去装置。 （１０）前記吸着材が、酸化チタンを主成分とする成形
体または酸化チタンを主成分とする粉末もしくはスラリ
であることを特徴とする上記（８）または（９）に記載
の排ガス中のセレン除去装置。(9) An adsorption tower main body having an exhaust gas inlet and an exhaust gas outlet, an adsorbent spray nozzle provided on a ceiling portion of the adsorption tower main body, and an adsorbent storage section provided on a bottom portion, and the absorbent storage. A connection pipe for connecting the unit and the spray nozzle, a heating furnace that is ejected by the spray nozzle, heats the adsorbent that has adsorbed the selenium component by contacting the selenium-containing exhaust gas, and releases the selenium component, and An apparatus for removing selenium from exhaust gas, comprising: selenium recovery means for absorbing selenium components with water. (10) The selenium in the exhaust gas according to the above (8) or (9), wherein the adsorbent is a molded body containing titanium oxide as a main component, or a powder or a slurry containing titanium oxide as a main component. Removal device.
【００１０】[0010]
【発明の実施の形態】以下、本発明を実施例によって詳
細に説明する。図１は、本発明の一実施例である排ガス
中のセレン除去方法を示す装置系統図であり、図２〜図
４は、図１に用いた本発明の一実施例であるセレン除去
装置の説明図である。なお、図２は、セレン除去装置の
上方視図、図３は、図２の III− III線矢視方向断面
図、図４は、図２のIV−IV線矢視方向断面図である。図
１において、この装置が図１１の従来技術と相違すると
ころは、エアヒータ３とＧＧＨの熱回収部４との間に、
セレン除去装置１５を設け、該セレン除去装置１５のセ
レン回収部１４を沈殿装置１１の前流の還元装置１０に
連結した点である。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments. FIG. 1 is an apparatus system diagram showing a method for removing selenium in exhaust gas according to one embodiment of the present invention, and FIGS. 2 to 4 show the selenium removing apparatus according to one embodiment of the present invention used in FIG. FIG. 2 is a top view of the selenium removing device, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. In FIG. 1, this device is different from the prior art of FIG. 11 in that an air heater 3 and a GGH heat recovery unit 4
The selenium removal device 15 is provided, and the selenium recovery part 14 of the selenium removal device 15 is connected to the reduction device 10 upstream of the precipitation device 11.
【００１１】図２〜図４において、本実施例のセレン除
去装置は、排ガス煙道１６に隣設されたガス加熱炉１７
と、該ガス加熱炉１７と前記排ガス煙道１６との間に設
けられた回転軸１８を中心にして前記排ガス煙道１６お
よびガス加熱炉１７を横切って回転し、前記排ガス煙道
１６内でセレン成分を吸着して前記ガス加熱炉１７で離
脱させる円盤状の吸着材としての成形体２０と、前記離
脱したセレン成分を水で吸収するセレン回収手段とから
主として構成されており、セレン回収手段は、前記ガス
加熱炉１７にガス流路２７を介して連結されたセレン吸
収塔３０と、該セレン吸収塔３０の天井部分に設けられ
た噴霧ノズル２５および底部に設けられた液溜部２８
と、該液溜部２８と前記噴霧ノズル２５を連結する循環
配管２９と、該循環配管２９に設けられた循環ポンプ２
６とから主として構成されている。２１は、成形体２０
のセレン吸着部、２２は、セレン脱離部、２３は、成形
体２０の駆動装置、２４は、バーナである。なお、成形
体２０のセレン吸着部２１からなる部分をセレン捕集部
１３と、該セレン捕集部１３の後段以降をセレン回収部
１４ということができる。2 to 4, a selenium removing apparatus according to this embodiment includes a gas heating furnace 17 provided adjacent to an exhaust gas flue 16.
Rotating around the rotation axis 18 provided between the gas heating furnace 17 and the exhaust gas flue 16, across the exhaust gas flue 16 and the gas heating furnace 17, and The selenium component is mainly composed of a disc-shaped molded body 20 that adsorbs the selenium component and is released in the gas heating furnace 17 and a selenium recovery unit that absorbs the released selenium component with water. A selenium absorption tower 30 connected to the gas heating furnace 17 via a gas flow path 27; a spray nozzle 25 provided at a ceiling portion of the selenium absorption tower 30;
A circulation pipe 29 connecting the liquid reservoir 28 and the spray nozzle 25; and a circulation pump 2 provided in the circulation pipe 29.
6 mainly. 21 is a molded body 20
Is a selenium adsorbing section, 22 is a selenium desorbing section, 23 is a driving device for the molded body 20, and 24 is a burner. In addition, the portion of the molded body 20 including the selenium adsorbing portion 21 can be referred to as a selenium collecting portion 13, and a portion subsequent to the selenium collecting portion 13 can be referred to as a selenium collecting portion 14.
【００１２】このような構成において、ボイラ１から排
出される排ガスＡは、排ガス煙道１６を流通し、脱硝装
置２でＮＯｘが除去されたのち、Ａ／Ｈ３を経てセレン
除去装置１５のセレン捕集部１３に流入し、酸化チタン
を主成分とする吸着材の成形体２０の吸着部２１を通過
する際に、排ガスに含まれるセレン成分が前記成形体２
０に吸着する。成形体２０は駆動装置２３により回転軸
１８を中心としてゆっくり回転し、前記セレン成分が吸
着した吸着部２１が、ガス加熱炉１７内に移動して離脱
部２２となり、ここでバーナ２４の燃焼によって、３０
０℃以上、例えば３２０℃に加熱され、吸着していたセ
レン成分が離脱する。以下、成形体２０は排ガス煙道１
６とガス加熱炉１７を横切って回転を続け、同様にして
排ガス中のセレン成分の吸着と離脱を繰り返す。脱離し
た高濃度のセレン成分を含んだガスは流路２７を経てセ
レン吸収塔３０に流入し、噴霧ノズル２５を経て噴霧さ
れる水と接触して吸収、回収される。セレンを回収した
水は、液溜部２８に落下し、該液溜部２８から循環ポン
プ２６および循環配管２９を経て前記噴霧ノズル２５に
循環して再利用され、高濃度のセレン成分含有水として
回収される。高濃度のセレン成分を含む水は、後流の還
元装置１０および沈殿装置１１に送られ（図１参照）、
従来技術と同様に、例えば６価のセレンが４価に還元さ
れたのち、沈殿装置１１で、例えば凝集剤によって沈殿
除去され、セレンを含むスラッジＤが回収される。In such a configuration, the exhaust gas A discharged from the boiler 1 flows through the exhaust gas flue 16, and after NOx is removed by the denitration device 2, the selenium is removed by the selenium removal device 15 via the A / H 3. When flowing into the collecting portion 13 and passing through the adsorbing portion 21 of the molded body 20 of the adsorbent containing titanium oxide as a main component, the selenium component contained in the exhaust gas contains the selenium component.
Adsorb to 0. The molded body 20 is slowly rotated about the rotating shaft 18 by the driving device 23, and the adsorbing section 21 on which the selenium component is adsorbed moves into the gas heating furnace 17 to become the detaching section 22, where the burner 24 burns. , 30
Heated to 0 ° C. or more, for example, 320 ° C., the adsorbed selenium component is released. Hereinafter, the molded body 20 is the exhaust gas flue 1
6 and continue rotating across the gas heating furnace 17, and the selenium component in the exhaust gas is repeatedly adsorbed and desorbed in the same manner. The desorbed gas containing the high-concentration selenium component flows into the selenium absorption tower 30 through the flow path 27, and comes into contact with water sprayed through the spray nozzle 25 to be absorbed and collected. The water from which selenium has been collected falls into a liquid reservoir 28, and is circulated from the liquid reservoir 28 to the spray nozzle 25 via a circulation pump 26 and a circulation pipe 29, and is reused. Collected. Water containing a high concentration of selenium component is sent to a downstream reduction device 10 and a precipitation device 11 (see FIG. 1),
As in the prior art, for example, after hexavalent selenium is reduced to tetravalent, the sedimentation device 11 removes the sediment by, for example, a flocculant, and collects the sludge D containing selenium.
【００１３】セレン成分が除去された排ガスはガス流路
２７を経て排ガス煙道１６へ戻され、ＧＧＨの熱回収部
４を経てＥＰ５に導かれ、ここでばい塵Ｂが除去された
のち、脱硫装置６に流入し、ここで排ガス中のＳＯ2 が
除去され、ＧＧＨの再加熱部７で排ガス温度が高められ
たのち、煙突８から大気に放出される。なお、脱硫装置
６から抜き出された吸収液は脱水機９に導入され、ここ
で脱水して石膏Ｃが回収される。本実施例によれば、セ
レン除去装置１５の捕集部１３で捕集したセレン成分を
回収部１４で高濃度で回収できるので、還元装置１０お
よび沈殿装置１１に送られる被処理液中のセレン濃度を
従来技術の１０〜１００倍程度に高めることができる。
換言すれば、処理すべき絶対量として同等量のセレン成
分を含む全液量を、従来技術の１／１０〜１／１００程
度に低減できる。従って、還元装置１０および沈殿装置
１１をより小さくできるだけでなく、薬品をはじめとす
るユーティリティーを含めた処理コストを大幅に低減す
ることができる。The exhaust gas from which the selenium component has been removed is returned to the exhaust gas flue 16 via the gas flow path 27, guided to the EP 5 via the GGH heat recovery unit 4, where the dust B is removed, and then desulfurized. After flowing into the device 6, SO 2 in the exhaust gas is removed, and the temperature of the exhaust gas is increased in the reheating section 7 of the GGH, and then discharged to the atmosphere from the chimney 8. The absorbent extracted from the desulfurization device 6 is introduced into a dehydrator 9, where it is dehydrated and gypsum C is collected. According to the present embodiment, since the selenium component collected by the collection unit 13 of the selenium removal device 15 can be recovered at a high concentration by the recovery unit 14, selenium in the liquid to be treated sent to the reduction device 10 and the precipitation device 11 can be recovered. The concentration can be increased about 10 to 100 times of the prior art.
In other words, the total amount of liquid containing an equivalent amount of selenium component to be treated can be reduced to about 1/10 to 1/100 of the conventional technology. Therefore, not only the reduction device 10 and the precipitation device 11 can be made smaller, but also the processing cost including utilities such as chemicals can be significantly reduced.
【００１４】本発明において、セレン吸着部２１におけ
る排ガス温度は２００℃以下であることが好ましく、よ
り好ましくは、１８０℃以下である。２００℃よりも高
くなるとセレン捕集率が低下する。一方セレン離脱部２
２における排ガス温度は、３００℃以上であることが好
ましく、より好ましくは３２０℃以上である。３００℃
よりも低くなると脱離率が低下する。図５は、本発明に
おけるガス温度とセレン捕集率との関係を示す図であ
る。図においてガス温度２００℃以下で捕集率が高くな
ることが分かる。また図６は、本発明における排ガス温
度とセレン離脱率との関係を示す図である。図において
排ガス温度が３００℃以上になると離脱率が高くなるこ
とが分かる。なお、セレン捕集部における排ガス温度の
下限は、図５から１２０℃程度、セレン離脱部における
排ガス温度の上限は、図６から３７０℃程度であること
が好ましいと言うことができる。In the present invention, the temperature of the exhaust gas in the selenium adsorption section 21 is preferably 200 ° C. or lower, more preferably 180 ° C. or lower. If the temperature is higher than 200 ° C., the selenium collection rate decreases. On the other hand, selenium release part 2
The exhaust gas temperature in 2 is preferably 300 ° C. or higher, more preferably 320 ° C. or higher. 300 ℃
If it is lower than this, the desorption rate decreases. FIG. 5 is a diagram showing the relationship between the gas temperature and the selenium collection rate in the present invention. It can be seen from the figure that the trapping rate increases at a gas temperature of 200 ° C. or lower. FIG. 6 is a diagram showing the relationship between the exhaust gas temperature and the selenium separation rate in the present invention. In the figure, it can be seen that when the exhaust gas temperature exceeds 300 ° C., the desorption rate increases. In addition, it can be said that the lower limit of the exhaust gas temperature in the selenium collector is preferably about 120 ° C. from FIG. 5 and the upper limit of the exhaust gas temperature in the selenium desorbing section is preferably about 370 ° C. from FIG.
【００１５】図７は、本発明の別の実施例である排ガス
中のセレン除去方法を示す装置系統図であり、図８〜図
１０は、図７で用いた本発明の別の実施例であるセレン
除去装置を示す説明図である。なお、図８は、セレン除
去装置の上方視図、図９は、図８のIX−IX線矢視方向断
面図、図１０は、図８のＸ−Ｘ線矢視方向断面図であ
る。図７において、この装置が図１の装置と異なる点
は、ＥＰ５を脱硝装置２の前流に移し、セレン除去装置
として、酸化チタンを主成分とする粉末を排ガス中に噴
霧して前記排ガス中のセレン成分を吸着、捕集し、該捕
集したセレン成分を離脱させて水で吸収するセレン除去
装置３３を設けた点である。FIG. 7 is a system diagram showing a method of removing selenium from exhaust gas according to another embodiment of the present invention. FIGS. 8 to 10 show another embodiment of the present invention used in FIG. It is explanatory drawing which shows a certain selenium removal apparatus. 8 is a top view of the selenium removing device, FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 8, and FIG. 10 is a cross-sectional view taken along line XX of FIG. In FIG. 7, this apparatus is different from the apparatus of FIG. 1 in that EP5 is moved upstream of the denitration apparatus 2, and as a selenium removal apparatus, a powder containing titanium oxide as a main component is sprayed into the exhaust gas to remove the EP5. Is that a selenium removing device 33 is provided which adsorbs and collects the selenium component described above, desorbs the collected selenium component and absorbs it with water.
【００１６】図８〜図１０において、このセレン除去装
置は、排ガスの入口３４と出口３５を有するセレン吸着
塔本体３６と、該セレン吸着塔本体３６の天井部分に設
けられた吸着材の噴霧ノズルとしての粉体ノズル３７お
よび底部に設けられた吸着材貯蔵部としての粉体貯蔵部
３８と、該粉体貯蔵部３８と前記粉体ノズル３７とを連
結する連結配管としての循環配管３９と、前記粉体ノズ
ル３７から噴射され、吸着塔本体３６内でセレン含有ガ
スと接触してセレン成分を吸着した吸着材としての粉体
Ｅを排ガス流路２７を介して受け取り、前記粉体Ｅを加
熱してセレン成分を離脱させる加熱炉４１と、離脱した
セレン成分を水で吸収して回収するセレン回収手段とか
ら主として構成されており、前記加熱炉４１の底部に
は、加熱ガスＦによって粉体Ｅを流動させるガス加熱部
４２が設けられている。なお、セレン回収手段は図２お
よび図４に示したセレン吸収塔３０と同様の構成である
ので、説明を省略する。また、排ガスに粉末状の吸着材
を噴霧してセレン成分を吸着分離する、主としてセレン
吸着塔からなる部分をセレン捕集部３１と、前記セレン
成分を吸着した吸着材を加熱する加熱炉４１とその後流
のセレン吸収塔３０とから主としてなる部分をセレン回
収部３２ということができる。8 to 10, the selenium removal apparatus includes a selenium adsorption tower main body 36 having an exhaust gas inlet 34 and an outlet 35, and an adsorbent spray nozzle provided on a ceiling portion of the selenium adsorption tower main body 36. A powder nozzle 37 and a powder storage section 38 as an adsorbent storage section provided at the bottom portion; a circulation pipe 39 as a connection pipe connecting the powder storage section 38 and the powder nozzle 37; The powder E, which is injected from the powder nozzle 37 and comes into contact with the selenium-containing gas in the adsorption tower main body 36 to adsorb the selenium component, is received via the exhaust gas channel 27 and heated. And a selenium recovery means for absorbing and recovering the separated selenium component with water, and a heating gas F is provided at the bottom of the heating furnace 41. Gas heating unit 42 for flowing the powder E is provided Te. The selenium recovery means has the same configuration as that of the selenium absorption tower 30 shown in FIGS. 2 and 4, and a description thereof will be omitted. In addition, a selenium component is adsorbed and separated by spraying a powdery adsorbent onto the exhaust gas. A portion mainly composed of the selenium absorption tower 30 in the subsequent stream can be referred to as a selenium recovery unit 32.
【００１７】このような構成において、ボイラ１から排
出される排ガスＡは、ＥＰ５によりばい塵Ｂが除去され
たのち、脱硝装置２およびＡ／Ｈ３を経てセレン除去装
置３３のセレン捕集塔３６に排ガス入口３４から流入
し、粉体ノズル３７から噴射される酸化チタンを主成分
とする粉体Ｅと接触して排ガス中のセレン成分が吸着さ
れる。セレン成分を吸着した粉体Ｅはセレン吸着塔本体
３６の底部粉体貯蔵部３８に一時的に貯留され、循環配
管３９および粉体供給装置４０を介して前記粉体ノズル
３７へ供給されて循環使用される。このとき、セレン成
分を吸着した粉体Ｅの一部は、ガス流路２７を経て加熱
炉４１に送られ、ここで、例えば加熱ガスＦと流動接触
して、例えば３２０℃に加熱され、吸着していたセレン
成分が離脱する。離脱した高濃度のセレン成分を含むガ
スはガス流路２７を経てセレン吸収塔３０に流入し、噴
霧ノズル２５を経て噴霧される水と接触して吸収、回収
される。セレンを回収した水は、上記実施例と同様に循
環使用され、高濃度のセレン成分含有水として回収され
る。高濃度のセレン成分を含む水は、上記実施例と同
様、後流の還元装置１０および沈殿装置１１に送られ
（図７参照）、セレンは従来技術と同様に、セレンを含
むスラッジＤとして回収される。In such a configuration, the exhaust gas A discharged from the boiler 1 is subjected to the EP5 to remove the dust B, and then passes through the denitration device 2 and A / H3 to the selenium collection tower 36 of the selenium removal device 33. The selenium component in the exhaust gas is adsorbed by coming in from the exhaust gas inlet 34 and coming into contact with the powder E containing titanium oxide as a main component and injected from the powder nozzle 37. The powder E to which the selenium component is adsorbed is temporarily stored in the bottom powder storage section 38 of the selenium adsorption tower main body 36, and is supplied to the powder nozzle 37 via the circulation pipe 39 and the powder supply device 40 to be circulated. used. At this time, a part of the powder E to which the selenium component is adsorbed is sent to the heating furnace 41 through the gas passage 27, where it is brought into fluid contact with, for example, the heating gas F, and is heated to, for example, 320 ° C. The separated selenium component is separated. The separated gas containing a high-concentration selenium component flows into the selenium absorption tower 30 through the gas passage 27, and is absorbed and recovered by contacting water sprayed through the spray nozzle 25. The water from which selenium has been recovered is circulated and used in the same manner as in the above example, and is recovered as high-concentration selenium component-containing water. Water containing a high concentration of selenium component is sent to the downstream reduction device 10 and sedimentation device 11 in the same manner as in the above embodiment (see FIG. 7), and selenium is recovered as sludge D containing selenium similarly to the prior art. Is done.
【００１８】セレン成分を離脱した、加熱炉４１内の粉
末Ｅは、図示省略した管路を経てセレン吸着塔本体３６
に戻されて循環使用され、排ガス中のセレン成分の吸着
と分離を繰り返す。一方、セレン成分が除去された排ガ
スはセレン吸着塔本体３６の排ガス出口３５から流出
し、ＧＧＨの熱回収部４で所定温度に調整されたのち、
後流の脱硫装置６に流入し、ここでＳＯ2 が除去され
る。ＳＯ2 が除去された排ガスはＧＧＨの再加熱部７で
その温度が所定温度に高められたのち、煙突８から大気
に放出される。本実施例によれば、上記実施例と同様、
排ガス中のセレン成分を高効率で除去、回収することが
できる。本実施例において、セレン成分を吸着した、酸
化チタンを主成分とする粉末Ｅを加熱して前記セレン成
分を脱着させて処理する代わりに、前記粉末Ｅをそのま
ま、固化、無害化してもよい。The powder E in the heating furnace 41 from which the selenium component has been separated is passed through a pipe (not shown) to the selenium adsorption tower main body 36.
The selenium component in the exhaust gas is repeatedly adsorbed and separated. On the other hand, the exhaust gas from which the selenium component has been removed flows out from the exhaust gas outlet 35 of the selenium adsorption tower main body 36, and is adjusted to a predetermined temperature by the heat recovery unit 4 of the GGH.
It flows into the desulfurization apparatus 6 on the downstream, where SO 2 is removed. The exhaust gas from which SO 2 has been removed is released to the atmosphere from a chimney 8 after its temperature is raised to a predetermined temperature in a GGH reheating unit 7. According to this embodiment, similar to the above embodiment,
Selenium components in exhaust gas can be removed and recovered with high efficiency. In the present embodiment, instead of heating the powder E containing titanium oxide as a main component and adsorbing the selenium component to desorb and treat the selenium component, the powder E may be solidified and made harmless as it is.
【００１９】本実施例において、セレン成分を吸着する
セレン吸着塔本体３６における排ガス温度は２００℃以
下であることが好ましく、セレン成分を離脱させる加熱
炉４１内のガス温度は、３００℃以上であることが好ま
しい。本実施例において、酸化チタンを主成分とする粉
末状の吸着材の代わりに、前記酸化チタンを主成分とす
る吸着材のスラリを用いることもできる。本発明におい
て、排ガス温度の調整方法は特に限定されるものではな
い。すなわち排ガスの冷却方法としては、例えば排ガス
中に水を噴霧する方法、熱交換装置を使用する方法等が
挙げられ、加熱方法としては、例えばバーナによる燃焼
加熱方法、ボイラ排ガスの一部を混入させる方法等が挙
げられるが、その他の方法であってもよい。In this embodiment, the temperature of the exhaust gas in the selenium adsorption tower main body 36 for adsorbing the selenium component is preferably 200 ° C. or lower, and the gas temperature in the heating furnace 41 for desorbing the selenium component is 300 ° C. or higher. Is preferred. In this embodiment, instead of the powdery adsorbent containing titanium oxide as a main component, a slurry of the adsorbent containing titanium oxide as a main component can be used. In the present invention, the method for adjusting the exhaust gas temperature is not particularly limited. That is, examples of the method of cooling the exhaust gas include a method of spraying water into the exhaust gas, a method of using a heat exchange device, and the like. Examples of the heating method include a combustion heating method using a burner and a part of the boiler exhaust gas mixed. Although a method etc. are mentioned, other methods may be used.
【００２０】[0020]
【発明の効果】本願の請求項１に記載の発明によれば、
排ガスに含まれるセレン成分を効率よく除去することが
できる。本願の請求項２に記載の発明によれば、上記発
明の効果に加え、吸着材の取り扱いが容易となる。本願
の請求項３に記載の発明によれば、上記発明の効果に加
え、セレン成分の吸着効率が向上する。According to the invention described in claim 1 of the present application,
The selenium component contained in the exhaust gas can be efficiently removed. According to the invention described in claim 2 of the present application, in addition to the effects of the above invention, handling of the adsorbent becomes easy. According to the invention described in claim 3 of the present application, in addition to the effects of the above invention, the selenium component adsorption efficiency is improved.
【００２１】本願の請求項４に記載の発明によれば、上
記発明の効果に加え、セレン成分の除去効率が向上す
る。本願の請求項５に記載の発明によれば、上記発明の
効果に加え、吸着材の利用率が向上する。本願の請求項
６に記載の発明によれば、上記発明の効果に加え、排ガ
スから分離したセレン成分の回収率が向上する。本願の
請求項７に記載の発明によれば、上記発明と同様、セレ
ン成分の回収率が向上する。According to the invention of claim 4 of the present application, in addition to the effects of the above invention, the efficiency of removing selenium components is improved. According to the invention described in claim 5 of the present application, in addition to the effects of the above invention, the utilization rate of the adsorbent is improved. According to the invention described in claim 6 of the present application, in addition to the effects of the above invention, the recovery rate of the selenium component separated from the exhaust gas is improved. According to the invention described in claim 7 of the present application, the recovery rate of the selenium component is improved as in the above invention.
【００２２】本願の請求項８に記載の発明によれば、排
ガスに含まれるセレン成分を効率よく除去できる装置が
得られる。本願の請求項９に記載の発明によれば、上記
発明と同様、排ガスに含まれるセレン成分を効率よく除
去できる装置が得られる。本願の請求項１０に記載の発
明によれば、上記発明の効果に加え、セレン成分の除去
効率が向上する。According to the invention described in claim 8 of the present application, an apparatus capable of efficiently removing selenium components contained in exhaust gas can be obtained. According to the invention described in claim 9 of the present application, an apparatus capable of efficiently removing the selenium component contained in the exhaust gas can be obtained as in the above invention. According to the invention described in claim 10 of the present application, in addition to the effects of the above invention, the removal efficiency of the selenium component is improved.
【図１】本発明の一実施例を示す装置系統図。FIG. 1 is a system diagram showing an embodiment of the present invention.
【図２】図１のセレン除去装置の説明図。FIG. 2 is an explanatory view of the selenium removing device of FIG.
【図３】図２の III− III線矢視方向断面図。FIG. 3 is a sectional view taken along line III-III of FIG. 2;
【図４】図２のIV−IV線矢視方向断面図。FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;
【図５】排ガス温度とセレン捕集率との関係を示す図。FIG. 5 is a diagram showing a relationship between exhaust gas temperature and selenium collection rate.
【図６】排ガス温度とセレン脱離率との関係を示す図。FIG. 6 is a graph showing the relationship between exhaust gas temperature and selenium desorption rate.
【図７】本発明の他の実施例を示す装置系統図。FIG. 7 is an apparatus system diagram showing another embodiment of the present invention.
【図８】図７のセレン除去装置の説明図。FIG. 8 is an explanatory view of the selenium removing device of FIG. 7;
【図９】図８のIX−IX線矢視方向断面図。FIG. 9 is a sectional view taken along line IX-IX in FIG. 8;
【図１０】図８のＸ−Ｘ線矢視方向断面図。FIG. 10 is a sectional view taken along line XX of FIG. 8;
【図１１】従来技術を示す説明図。FIG. 11 is an explanatory view showing a conventional technique.
１…ボイラ、２…脱硝装置、３…エアヒータ（Ａ／
Ｈ）、４…ガス−ガスヒータ（ＧＧＨ）の熱回収部、５
…電気集じん機（ＥＰ）、６…脱硫装置、７…ガス−ガ
スヒータ（ＧＧＨ）の再加熱部、８…煙突、９…脱水
機、１０…還元装置、１１…沈殿装置、１２…溶解装
置、１３…セレン捕集部、１４…セレン回収部、１５…
セレン除去装置、１６…排ガス煙道、１７…ガス加熱
炉、１８…回転軸、２０…成形体、２１…セレン吸着
部、２２…セレン離脱部、２３…駆動装置、２４…バー
ナ、２５…噴霧ノズル、２６…循環ポンプ、２７…ガス
流路、２８…液溜部、２９…循環配管、３０…セレン吸
収塔、３１…セレン捕集部、３２…セレン回収部、３３
…セレン除去装置、３４…排ガス入口、３５…排ガス出
口、３６…セレン吸着塔本体、３７…粉体ノズル、３８
…粉体貯蔵部、３９…循環配管、４０…粉体供給装置、
４１…加熱炉、４２…ガス加熱部。1: Boiler, 2: Denitration device, 3: Air heater (A /
H), 4 ... heat recovery section of gas-gas heater (GGH), 5
... Electric precipitator (EP), 6 ... desulfurizer, 7 ... gas-gas heater (GGH) reheating unit, 8 ... chimney, 9 ... dehydrator, 10 ... reducing device, 11 ... precipitation device, 12 ... melting device , 13 ... selenium collecting unit, 14 ... selenium recovery unit, 15 ...
Selenium removal device, 16: flue gas flue, 17: gas heating furnace, 18: rotating shaft, 20: molded body, 21: selenium adsorption unit, 22: selenium desorption unit, 23: drive unit, 24: burner, 25: spray Nozzle, 26 ... Circulation pump, 27 ... Gas flow path, 28 ... Liquid reservoir, 29 ... Circulation pipe, 30 ... Selenium absorption tower, 31 ... Selenium collection part, 32 ... Selenium recovery part, 33
... Selenium removal device, 34 ... Exhaust gas inlet, 35 ... Exhaust gas outlet, 36 ... Selenium adsorption tower main body, 37 ... Powder nozzle, 38
... powder storage unit, 39 ... circulation pipe, 40 ... powder supply device,
41: heating furnace, 42: gas heating unit.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高本 成仁 広島県呉市宝町３番36号 バブコック日立 株式会社呉研究所内 (72)発明者 野沢 滋 広島県呉市宝町６番９号 バブコック日立 株式会社呉工場内 Ｆターム(参考） 4D002 AA40 AC01 BA04 CA01 CA05 DA11 DA21 DA70 EA05 EA08 GA01 GB03 GB11 4G066 AA23A AA23B BA01 CA46 DA02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Seiji Takamoto 3-36 Takara-cho, Kure-shi, Hiroshima Pref. Inside the Kure Research Laboratory, Babcock Hitachi Co., Ltd. (72) Inventor Shigeru Nozawa 6-9 Takara-cho, Kure-shi, Hiroshima Pref. F term in the Kure factory (reference) 4D002 AA40 AC01 BA04 CA01 CA05 DA11 DA21 DA70 EA05 EA08 GA01 GB03 GB11 4G066 AA23A AA23B BA01 CA46 DA02
Claims (10)
主成分とする吸着材に接触させ、前記セレン成分を吸着
除去することを特徴とする排ガス中のセレンの除去方
法。1. A method for removing selenium from exhaust gas, comprising contacting an exhaust gas containing a selenium component with an adsorbent containing titanium oxide as a main component to adsorb and remove the selenium component.
記載の方法。2. The method according to claim 1, wherein the adsorbent is a molded body.
る請求項１に記載の方法。3. The method according to claim 1, wherein the adsorbent is in the form of a powder or a slurry.
２００℃以下であることを特徴とする請求項１〜３の何
れかに記載の方法。4. The temperature of exhaust gas brought into contact with the adsorbent is:
The method according to claim 1, wherein the temperature is 200 ° C. or lower.
を高めて吸着しているセレン成分を離脱させたのち、再
度排ガスと接触させることを特徴とする請求項１〜４の
何れかに記載の排ガス中のセレン除去方法。5. The method according to claim 1, wherein the temperature of the adsorbent that has adsorbed the selenium component is increased to desorb the adsorbed selenium component, and the selenium component is brought into contact with the exhaust gas again. For removing selenium from flue gas.
温度が、３００℃以上であることを特徴とする請求項５
に記載の方法。6. The exhaust gas temperature at the time of releasing the selenium component is 300 ° C. or higher.
The method described in.
むガスを水と接触させて前記セレン成分を回収すること
を特徴とする請求項５または６に記載の方法。7. The method according to claim 5, wherein the gas containing the selenium component released from the adsorbent is brought into contact with water to recover the selenium component.
熱炉と前記排ガス煙道との間に設けられた回転軸を中心
にして前記排ガス煙道および加熱炉を横切って回転して
前記排ガス煙道内でセレン成分を吸着して前記加熱炉内
で離脱させる円盤状の吸着材と、前記離脱したセレン成
分を水で吸収するセレン回収手段とを有することを特徴
とする排ガス中のセレン除去装置。8. A heating furnace disposed adjacent to the exhaust gas flue, and rotating across the exhaust gas flue and the heating furnace about a rotation axis provided between the heating furnace and the exhaust gas flue. A disc-shaped adsorbent for adsorbing selenium components in the flue gas flue and desorbing in the heating furnace, and selenium recovery means for absorbing the desorbed selenium components with water. Selenium removal device.
本体と、該吸着塔本体の天井部分に設けられた吸着材の
噴霧ノズルおよび底部に設けられた吸着材貯蔵部と、該
吸収材の貯蔵部と前記噴霧ノズルとを連結する連結配管
と、前記噴霧ノズルから噴射され、セレン含有排ガスと
接触してセレン成分を吸着した吸着材を加熱して前記セ
レン成分を離脱させる加熱炉と、離脱したセレン成分を
水で吸収するセレン回収手段とを有することを特徴とす
る排ガス中のセレン除去装置。9. An adsorption tower main body having an exhaust gas inlet and an exhaust gas outlet, an adsorbent spray nozzle provided at a ceiling portion of the adsorption tower main body, and an adsorbent storage section provided at a bottom portion, and storage of the absorbent. A connecting pipe for connecting the unit and the spray nozzle, a heating furnace that is ejected from the spray nozzle and contacts the selenium-containing exhaust gas to heat the adsorbent that has adsorbed the selenium component and separates the selenium component, and An apparatus for removing selenium from exhaust gas, comprising: selenium recovery means for absorbing selenium components with water.
する成形体または酸化チタンを主成分とする粉末もしく
はスラリであることを特徴とする請求項８または９に記
載の排ガス中のセレン除去装置。10. The selenium removal from exhaust gas according to claim 8, wherein the adsorbent is a molded body containing titanium oxide as a main component, or a powder or a slurry containing titanium oxide as a main component. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28835099A JP3737916B2 (en) | 1999-10-08 | 1999-10-08 | Method for removing selenium in exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28835099A JP3737916B2 (en) | 1999-10-08 | 1999-10-08 | Method for removing selenium in exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001104748A true JP2001104748A (en) | 2001-04-17 |
| JP3737916B2 JP3737916B2 (en) | 2006-01-25 |
Family
ID=17729079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28835099A Expired - Fee Related JP3737916B2 (en) | 1999-10-08 | 1999-10-08 | Method for removing selenium in exhaust gas |
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| Country | Link |
|---|---|
| JP (1) | JP3737916B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014172000A (en) * | 2013-03-11 | 2014-09-22 | Nihon Yamamura Glass Co Ltd | System and method for recovering selenium in exhaust gas |
| JP2014172796A (en) * | 2013-03-11 | 2014-09-22 | Nihon Yamamura Glass Co Ltd | System and method of recovering selenium in exhaust gas |
| WO2016132574A1 (en) * | 2015-02-19 | 2016-08-25 | 三菱重工業株式会社 | Method for selenium analysis |
| CN114682071A (en) * | 2022-03-04 | 2022-07-01 | 金川集团股份有限公司 | Process method for recovering selenium from selenium-containing flue gas |
-
1999
- 1999-10-08 JP JP28835099A patent/JP3737916B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014172000A (en) * | 2013-03-11 | 2014-09-22 | Nihon Yamamura Glass Co Ltd | System and method for recovering selenium in exhaust gas |
| JP2014172796A (en) * | 2013-03-11 | 2014-09-22 | Nihon Yamamura Glass Co Ltd | System and method of recovering selenium in exhaust gas |
| WO2016132574A1 (en) * | 2015-02-19 | 2016-08-25 | 三菱重工業株式会社 | Method for selenium analysis |
| CN114682071A (en) * | 2022-03-04 | 2022-07-01 | 金川集团股份有限公司 | Process method for recovering selenium from selenium-containing flue gas |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3737916B2 (en) | 2006-01-25 |
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