JP2779037B2 - By-product treatment method for desulfurization and denitration equipment - Google Patents
By-product treatment method for desulfurization and denitration equipmentInfo
- Publication number
- JP2779037B2 JP2779037B2 JP2051836A JP5183690A JP2779037B2 JP 2779037 B2 JP2779037 B2 JP 2779037B2 JP 2051836 A JP2051836 A JP 2051836A JP 5183690 A JP5183690 A JP 5183690A JP 2779037 B2 JP2779037 B2 JP 2779037B2
- Authority
- JP
- Japan
- Prior art keywords
- desulfurization
- denitration
- carbonaceous adsorbent
- tower
- discharged
- 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.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は脱硫脱硝装置の副成品の処理方法に関するも
のである。Description: TECHNICAL FIELD The present invention relates to a method for treating by-products of a desulfurization and denitration apparatus.
（従来技術） ボイラー，廃棄物焼却炉，製鉄用鉱石焼結炉，電気炉
等からの排気ガスは、集じん装置，調湿装置，脱硫装
置，脱硝装置等々各種の排ガス処理装置を経て煙突から
放出されるが、これら各種排煙処理装置からは各種の有
害物質を含む固型回収物が排出される。これら回収物の
一部は副成品として有効利用されるが、有害物を多少な
りとも含んでいるものは利用するにも、あるいは又投棄
するにしても問題がある。又それぞれの排煙処理装置か
らはそれぞれ異なる成分の固形物又は副成品が回収さ
れ、それらの種類が増し、取扱いが困難になるという問
題がある。(Prior art) Exhaust gas from boilers, waste incinerators, ore sintering furnaces for steelmaking, electric furnaces, etc. is passed through various exhaust gas treatment devices such as dust collectors, humidity controllers, desulfurizers, denitrifiers, etc. The solid waste containing various harmful substances is discharged from these various types of flue gas treatment devices. Although some of these collected products are effectively used as by-products, there is a problem in using or discarding those containing any harmful substances. In addition, there is a problem that solids or by-products of different components are collected from each of the flue gas treatment apparatuses, and the types of the solids and by-products are increased, which makes handling difficult.
第１に炭素質吸着剤式の乾式脱硫装置と、主として副
成品として硫安及び硝安を生成する電子線照射式脱硫脱
硝装置又はナノセコンドパルス状高電圧を印加して行な
うナノセコンドパルス式脱硫脱硝装置とを組合わせた場
合、電子線照射式又はナノセコンドパルス式から回収さ
れる硫安及び硝安と、炭素質吸着剤式から回収される濃
縮SO2ガスとの２種類になるという回収物の複雑化を避
ける必要がある。First, a carbonaceous adsorbent type dry desulfurization apparatus, and an electron beam irradiation type desulfurization denitrification apparatus for mainly producing ammonium sulfate and ammonium nitrate as a by-product or a nanosecond pulse type desulfurization denitrification apparatus performed by applying a nanosecond pulse-like high voltage Combined with the above, there are two types of recovered materials: ammonium sulfate and ammonium nitrate recovered from electron beam irradiation type or nanosecond pulse type, and concentrated SO 2 gas recovered from carbonaceous adsorbent type. Need to be avoided.
第２に排ガス中にアンモニアを添加して行なう脱硫又
は脱硝法に於て、これらの装置又は付属の集じん装置又
は粉じん処理装置等から排出される副成品以外の固形排
出物にはアンモニアが含まれており、そのまゝでは投棄
できないことがあるが、このような排出物を投棄又は再
利用できる様、処理する必要がある。Second, in the desulfurization or denitrification method in which ammonia is added to the exhaust gas, ammonia is contained in solid wastes other than by-products discharged from these devices or the attached dust collection device or dust treatment device, etc. Although such wastes may not be dumped as they are, it is necessary to treat such emissions so that they can be dumped or reused.
（発明が解決しようとする課題） 有害な分解性物質を含む他の排ガス処理装置又は他の
プロセスからの固形排出物を、活性炭の触媒効果によ
り、効率よく分解することができると共に、その副生成
物も単一種で、かつ有効に利用できる形態で回収するこ
とができる処理方法を提供することを目的とする。(Problems to be Solved by the Invention) Solid emissions from other exhaust gas treatment equipment or other processes containing harmful decomposable substances can be efficiently decomposed by the catalytic effect of activated carbon, and by-products thereof can be produced. It is an object of the present invention to provide a processing method capable of collecting a single kind of material in a form that can be used effectively.
（課題を解決するための手段） 炭素質吸着剤による乾式脱硫脱硝装置に於て、乾式脱
硫脱硝塔から排出された炭素質吸着剤と集じん装置又は
粉じん処理装置から排出された固形物、或いは乾式脱硫
脱硝装置とは異なる他のプロセスから排出された分解性
の物質が含まれている固形物とを混合したのち、脱離塔
３に投入し、該脱離塔３内で炭素質吸着剤の存在のも
と、脱離温度350℃〜450℃で加熱処理した。(Means for Solving the Problems) In a dry desulfurization and denitration apparatus using a carbonaceous adsorbent, a carbonaceous adsorbent discharged from a dry desulfurization and denitration tower and a solid substance discharged from a dust collecting device or a dust treatment device, or After mixing with a solid containing a decomposable substance discharged from another process different from the dry desulfurization and denitration apparatus, the mixture is charged into the desorption column 3 and the carbonaceous adsorbent is mixed in the desorption column 3. Was heated at a desorption temperature of 350 ° C to 450 ° C.
（実施例） 第１図及び第２図に基いて本発明の実施例について説
明するに先立ち、第３図を参照して従来公知の炭素質吸
着剤法による乾式脱硫脱硝装置について概略説明する。
第３図で、排ガス１は脱硫・脱硝塔２で脱硫・脱硝され
たのち煙突から排出される。脱硫・脱硝塔２で使用され
た炭素質吸着剤は脱離塔３に搬送され加熱再生される。
脱離塔３の内部は還元性の雰囲気で、約350〜450℃に加
熱されているので、脱硫・脱硝塔２で炭素質吸着剤に吸
着されていた物質は脱離され、同時に還元反応を伴って
脱離生成ガスを発生する。(Embodiment) Prior to description of an embodiment of the present invention with reference to FIGS. 1 and 2, a conventional dry desulfurization and denitration apparatus using a carbonaceous adsorbent method will be schematically described with reference to FIG.
In FIG. 3, exhaust gas 1 is desulfurized and denitrified in a desulfurization and denitration tower 2 and then discharged from a chimney. The carbonaceous adsorbent used in the desulfurization / denitration tower 2 is transported to the desorption tower 3 and is heated and regenerated.
Since the inside of the desorption tower 3 is heated to about 350 to 450 ° C. in a reducing atmosphere, the substance adsorbed by the carbonaceous adsorbent in the desulfurization / denitration tower 2 is desorbed, and at the same time, the reduction reaction is performed. A desorption product gas is generated accordingly.
さて、第１図は本発明方法の実施例で、他の排ガス処
理装置８から回収された固形排出物９は脱硫・脱硝塔２
から排出される炭素質吸着剤４と混合して脱離塔３に投
入される。 FIG. 1 shows an embodiment of the method of the present invention, in which a solid waste 9 recovered from another exhaust gas treatment device 8 is supplied to a desulfurization / denitration tower 2.
Mixed with the carbonaceous adsorbent 4 discharged from the reactor and charged into the desorption tower 3.
第２図は本発明のもう一つの実施例で、排ガス処理装
置に限らず他のプロセス11からの固形排出物12を脱硫・
脱硝塔２から排出される炭素質吸着剤４と混合して脱離
塔３に投入される。FIG. 2 shows another embodiment of the present invention, in which a solid effluent 12 not only from an exhaust gas treatment apparatus but also from another process 11 is desulfurized.
It is mixed with the carbonaceous adsorbent 4 discharged from the denitration tower 2 and charged into the desorption tower 3.
他の排ガス処理装置８又は他のプロセス11から回収さ
れた固形物に分解性の物質（例えば、（NH4）2SO4,NH4N
O3,NH3,H2SO4の他、炭化水素，有機物，溶剤等々）が含
まれていると、これらの物質は脱離塔３内で触媒作用を
有する炭素質吸着剤４の存在下で、かつ還元性雰囲気の
下で高温加熱され、最終的にCO2,H2O,N2,SO2等に分解さ
れる。これらの脱離及び分解されたガスは高濃度のSO2
ガスを含んでいるのでこれは次工程に於て硫黄又は硫酸
として回収することができる。Decomposable substances (eg, (NH 4 ) 2 SO 4 , NH 4 N) into solids recovered from another exhaust gas treatment device 8 or another process 11
O 3 , NH 3 , H 2 SO 4 , hydrocarbons, organic substances, solvents, etc.) are contained in the desorption tower 3 in the presence of a carbonaceous adsorbent 4 having a catalytic action. And heated at a high temperature under a reducing atmosphere, and finally decomposed into CO 2 , H 2 O, N 2 , SO 2 and the like. These desorbed and decomposed gases have high concentrations of SO 2
Since it contains gas, it can be recovered as sulfur or sulfuric acid in the next step.
一方残つた固形物は離脱塔３より排出され、篩分機５
にて粉分と粒子分とに分離される。粉分は上記分解性物
質が除去されているので、投棄、再利用等の取扱いが容
易である。粒子分は再び脱硫・脱硝塔２に送られ循環使
用される。On the other hand, the remaining solid matter is discharged from the separation tower 3, and the sieving machine 5
At the same time to separate into powder and particles. Since the decomposable substance is removed from the powder, handling such as dumping and reuse is easy. The particles are sent again to the desulfurization / denitration tower 2 and used for circulation.
（効果） 有害な分解性物質を含む他の排ガス処理装置又は同じ
く他のプロセスからの固形排出物を脱硫脱硝塔から排出
される炭素質吸着剤と混合して脱離塔に投入し、炭素質
吸着剤の触媒効果により、効率的に分解することができ
るようになった。一般にこれらの物質を分解しようとす
る800℃以上の高温で行なわなければならないが、本発
明方法によれば炭素質吸着剤を利用するので350℃〜450
℃という低温で分解できると共に、その副生成物は乾式
脱硫装置の副成品回収装置で有効に回収することができ
るようになった。(Effect) Solid waste from another exhaust gas treatment device or another process containing a harmful decomposable substance is mixed with a carbonaceous adsorbent discharged from a desulfurization and denitration tower, and charged into a desorption tower. The catalytic effect of the adsorbent has made it possible to decompose efficiently. In general, the decomposition must be performed at a high temperature of 800 ° C. or higher to decompose these materials.
It can be decomposed at a low temperature of ℃, and its by-product can be effectively recovered by a by-product recovery unit of a dry desulfurization unit.
更に、分解処理に脱離塔が使用できる為、別に固形廃
棄物の処理装置を設置する必要がなく、かつ単一種の副
成品となる為、副成品の処理が簡素化された。Furthermore, since a desorption tower can be used for the decomposition treatment, there is no need to separately install a solid waste treatment device, and since a single type of by-product is used, the treatment of the by-product is simplified.
第１図は本発明の実施例を示す。 第２図は本発明のもう１つの実施例を示す。 第３図は従来の炭素質吸着剤式乾式脱硫・脱硝装置。 図において； １……排ガス、２……脱硫・脱硝塔 ３……脱離塔、４……炭素質吸着剤 ５……篩分機、６……濃縮SO2ガス ７……固形排出物 ８……その他の排ガス処理装置 ９……固形排出物、10……別の排ガス 11……別のプロセス、12……固形排出物FIG. 1 shows an embodiment of the present invention. FIG. 2 shows another embodiment of the present invention. FIG. 3 shows a conventional carbonaceous adsorbent type dry desulfurization / denitration apparatus. In Figure; 1 ...... exhaust gas 2 ...... desulfurization and denitration tower 3 ...... regenerator, 4 ...... carbonaceous adsorbent 5 ...... sifter, 6 ...... concentrated SO 2 gas 7 ...... solid waste 8 ... … Other exhaust gas treatment equipment 9 …… Solid emissions, 10… Other exhaust gases 11 …… Other processes, 12 …… Solid emissions
Claims (1)
て、乾式脱硫脱硝塔から排出された炭素質吸着剤と集じ
ん装置又は粉じん処理装置から排出された固形物、或い
は乾式脱硫脱硝装置とは異なる他のプロセスから排出さ
れた分解性の物質が含まれている固形物とを混合したの
ち、脱離塔（３）に投入し、該脱離塔（３）内で炭素質
吸着剤の存在のもと、脱離温度350℃〜450℃で加熱処理
したことを特徴とする脱硫脱硝装置の副成品処理方法。In a dry desulfurization and denitration apparatus using a carbonaceous adsorbent, a carbonaceous adsorbent discharged from a dry desulfurization and denitration tower and a solid substance discharged from a dust collecting device or a dust treatment device, or a dry desulfurization and denitration device Mixed with a solid containing a decomposable substance discharged from another process different from the above, and then charged into a desorption tower (3), where the carbonaceous adsorbent is mixed. A method for treating by-products of a desulfurization and denitration apparatus, wherein a heat treatment is performed at a desorption temperature of 350 ° C. to 450 ° C. in the presence of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2051836A JP2779037B2 (en) | 1990-03-05 | 1990-03-05 | By-product treatment method for desulfurization and denitration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2051836A JP2779037B2 (en) | 1990-03-05 | 1990-03-05 | By-product treatment method for desulfurization and denitration equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03254817A JPH03254817A (en) | 1991-11-13 |
| JP2779037B2 true JP2779037B2 (en) | 1998-07-23 |
Family
ID=12897946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2051836A Expired - Lifetime JP2779037B2 (en) | 1990-03-05 | 1990-03-05 | By-product treatment method for desulfurization and denitration equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2779037B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000065466A (en) * | 1999-04-03 | 2000-11-15 | 이희철 | Method for treating waste gas and manufacturing by-product chemicals simultaneously |
| JP4970230B2 (en) * | 2007-12-10 | 2012-07-04 | 住友重機械工業株式会社 | Combustion / exhaust gas treatment apparatus and combustion / exhaust gas treatment method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6168123A (en) * | 1984-09-10 | 1986-04-08 | Ishikawajima Harima Heavy Ind Co Ltd | Dry desulfurizing method |
-
1990
- 1990-03-05 JP JP2051836A patent/JP2779037B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03254817A (en) | 1991-11-13 |
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