JPS63158119A - Absorbent supply in wet exhaust gas desulfurization device - Google Patents
Absorbent supply in wet exhaust gas desulfurization deviceInfo
- Publication number
- JPS63158119A JPS63158119A JP61307068A JP30706886A JPS63158119A JP S63158119 A JPS63158119 A JP S63158119A JP 61307068 A JP61307068 A JP 61307068A JP 30706886 A JP30706886 A JP 30706886A JP S63158119 A JPS63158119 A JP S63158119A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- circulation tank
- stirrer
- desulfurization tower
- tank
- 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
Links
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 62
- 230000023556 desulfurization Effects 0.000 title claims abstract description 62
- 230000002745 absorbent Effects 0.000 title claims abstract description 21
- 239000002250 absorbent Substances 0.000 title claims abstract description 21
- 239000002002 slurry Substances 0.000 claims abstract description 70
- 230000003647 oxidation Effects 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 13
- 235000010261 calcium sulphite Nutrition 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 12
- 239000003546 flue gas Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 9
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims description 9
- 229910052815 sulfur oxide Inorganic materials 0.000 claims description 9
- 230000001590 oxidative effect Effects 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000011575 calcium Substances 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000010440 gypsum Substances 0.000 abstract description 15
- 229910052602 gypsum Inorganic materials 0.000 abstract description 15
- 230000002265 prevention Effects 0.000 abstract description 6
- 238000011144 upstream manufacturing Methods 0.000 abstract description 3
- 238000001556 precipitation Methods 0.000 abstract 2
- 235000019738 Limestone Nutrition 0.000 description 26
- 239000006028 limestone Substances 0.000 description 26
- 238000004062 sedimentation Methods 0.000 description 13
- 239000007789 gas Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、湿式排煙脱硫装置における吸収剤の供給方法
に係り、特に排ガス中の硫黄酸化物を吸収除去する湿式
排煙脱硫装置におけるカルシウム系吸収剤を効率よく供
給する方法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for supplying an absorbent in a wet flue gas desulfurization system, and particularly to a method for supplying an absorbent in a wet flue gas desulfurization system that absorbs and removes sulfur oxides from flue gas. This invention relates to a method for efficiently supplying a system absorbent.
（従来の技術）
現在実用化されている湿式排煙脱硫装置は、石灰石、生
石灰、消石灰のようなカルシウム系吸収剤を使用し、副
生品として石膏を回収するいわゆる石灰石・石膏法（ま
たは石灰・石膏法）が主流である。第３図は石灰石を吸
収剤とし、副生品として石膏を回収する従来の一塔型排
煙脱硫装置を示したものである。ボイラ等の排ガス１は
脱硫塔２に導びかれ、ここで循環液（吸収剤）スラリと
接触し、冷却、除しん、脱硫され、デミスタ３で゛ ミ
ストを除去され、脱硫塔から排出される。一方、゛吸収
剤である石灰石スラリ２０は、石灰石スラリポンプ２１
により脱硫塔循環タンク４に供給され、ｉのスラリは、
脱硫塔循環ポンプ５により脱硫塔内へ設置されたスプレ
ノズルに供給され、ここから脱硫塔内に噴霧されて排ガ
スと接触し、排ガス中の硫黄酸化物を吸収除去して脱硫
塔循環タンクへ戻り循環使用される。吸収剤スラリは税
硫塔内を循環し硫黄酸化物を吸収除去することにより石
膏（ＣａＳＯ＋ ・２Ｈ２０）および亜硫酸カルシウム
（ＣａＳＯコ ・％Ｈ２０）となる。亜硫酸カルシウム
は脱硫塔循環タンク上部に設けられた酸化用攪拌機１１
により微細化されてスラリ中に注入される空気中の酸素
によって酸化され石膏となる。脱硫塔循環タンク内の石
灰石スラリは、脱硫塔内で硫黄酸化物を吸収し亜硫酸カ
ルシウムおよび石膏になるため、消費量に見合う石灰石
スラリか供給される。(Prior technology) Wet flue gas desulfurization equipment currently in practical use uses calcium-based absorbents such as limestone, quicklime, and slaked lime, and recovers gypsum as a byproduct (or limestone/gypsum method).・Gypsum method) is the mainstream. FIG. 3 shows a conventional one-tower type flue gas desulfurization device that uses limestone as an absorbent and recovers gypsum as a by-product. Exhaust gas 1 from a boiler, etc. is led to a desulfurization tower 2, where it comes into contact with a circulating liquid (absorbent) slurry, is cooled, de-dusted, and desulfurized, is removed from mist by a demister 3, and is discharged from the desulfurization tower. . On the other hand, the limestone slurry 20 which is an absorbent is transported to a limestone slurry pump 21.
The slurry i is supplied to the desulfurization tower circulation tank 4 by
It is supplied by the desulfurization tower circulation pump 5 to a spray nozzle installed in the desulfurization tower, from where it is sprayed into the desulfurization tower, contacts the exhaust gas, absorbs and removes sulfur oxides in the exhaust gas, and returns to the desulfurization tower circulation tank for circulation. used. The absorbent slurry circulates in the sulfur tower and absorbs and removes sulfur oxides, becoming gypsum (CaSO+ .2H20) and calcium sulfite (CaSO+%H20). Calcium sulfite is fed to the oxidation stirrer 11 installed at the top of the desulfurization tower circulation tank.
The slurry is made into fine particles and oxidized by the oxygen in the air, which is injected into the slurry to form gypsum. The limestone slurry in the desulfurization tower circulation tank absorbs sulfur oxides and becomes calcium sulfite and gypsum within the desulfurization tower, so that the amount of limestone slurry commensurate with consumption is supplied.
脱硫塔循環タンク下部にはスラリ中の固形分が沈積する
ことを防止するため沈積防止用攪拌機１２が設けられ、
スラリに流速を与えることにより沈積を防止している。A sedimentation prevention agitator 12 is provided at the bottom of the desulfurization tower circulation tank to prevent the solid content in the slurry from sedimenting.
By providing a flow velocity to the slurry, sedimentation is prevented.
脱硫塔循環タンク内のスラリの一部はブリードポンプ１
３によりシフフナ１４に導びかれ、濃縮された後、遠心
分離機１７で脱水され、粉体の石膏１８が回収される。A portion of the slurry in the desulfurization tower circulation tank is transferred to bleed pump 1.
3 to a sifter 14, where it is concentrated, dehydrated by a centrifugal separator 17, and powdered gypsum 18 is recovered.
シラフナ１４および遠心分ｌｉ！ｉ機１７での濾過水１
９は循環再利用される。Shirafuna 14 and centrifuge li! Filtered water 1 at i machine 17
9 is recycled.
−基型脱硫装置では、脱硫塔内で石灰石に硫黄酸化物を
吸収させ、石膏および亜硫酸カルシウムを生成し、さら
に亜硫酸カルシウムを酸化させて石膏とするため、効率
の良い酸化方法が要求される。- In the basic desulfurization equipment, sulfur oxides are absorbed by limestone in the desulfurization tower to produce gypsum and calcium sulfite, and the calcium sulfite is further oxidized to gypsum, so an efficient oxidation method is required.
第４図に実験によって得られた脱硫塔内スラリｐＨと酸
化速度の関係（ｐＨが低い程酸化速度が大きい）を示す
。排ガスに接触した直後の脱硫塔循環スラリはｐＨが低
いため、脱硫塔循環タンクでは排ガスと接触し硫黄酸化
物を吸収して落下したスラリかたまるタンク上層が下層
に比較してｐＨが低い。従来技術では脱硫塔循環タンク
上層の低ｐＨ域に酸化用攪拌機を設は空気を供給するこ
゛ と比より良好な酸化効果を得ている。FIG. 4 shows the relationship between the pH of the slurry in the desulfurization tower and the oxidation rate (the lower the pH, the higher the oxidation rate), which was obtained through experiments. Since the desulfurization tower circulating slurry has a low pH immediately after contacting the exhaust gas, the pH of the upper layer of the desulfurization tower circulation tank is lower than that of the lower layer in the desulfurization tower circulation tank, where the slurry that comes into contact with the exhaust gas absorbs sulfur oxides and falls. In the conventional technology, an oxidizing stirrer is provided in the low pH region in the upper layer of the desulfurization tower circulation tank, and air is supplied, thereby obtaining a better oxidizing effect.
゛ （発明が解決しようとする問題点）しかしながら、
上記従来技術では、比較的ｐＨの高い吸収剤である石灰
石スラリを石灰石スラリのタンク内向−分散をはかる目
的で脱硫塔循環タンク上面から供給しているために、脱
硫塔循環タンク上層に存在している低ｐＨ域の一部のス
ラリのｐＨが回復して高ｐＨとなる個所が生じ、前述の
低ｐＨ域における酸化効果を充分に生かしていない面が
あった。゛ (Problem that the invention seeks to solve) However,
In the above conventional technology, limestone slurry, which is an absorbent with a relatively high pH, is supplied from the top of the desulfurization tower circulation tank for the purpose of dispersing the limestone slurry into the tank. In some cases, the pH of the slurry in the low pH range recovered and became high in some places, and the oxidation effect in the low pH range described above was not fully utilized.
以上の理由により、脱硫塔循環タンク上層の低ｐＨ域を
維持しながら、供給される石灰石スラリをタンク内に均
一に分散させる方法が要望されていた。For the above reasons, there has been a need for a method for uniformly dispersing supplied limestone slurry within the desulfurization tower circulation tank while maintaining a low pH range in the upper layer thereof.
本発明の目的は、上記した従来技術の欠点をなくし、脱
硫塔に特別な装置を付加させることなく、脱硫塔循環タ
ンク上層の低ｐＨ域を良好に維持し、しかも供給される
石灰石スラリのタンク内向−分散を行なわせる吸収剤の
供給方法を提供することにある。It is an object of the present invention to eliminate the drawbacks of the prior art described above, to maintain a good low pH range in the upper layer of the desulfurization tower circulation tank without adding any special equipment to the desulfurization tower, and to provide a tank for supplying limestone slurry. The object of the present invention is to provide a method for supplying an absorbent that causes inward dispersion.
（問題点を解決するための手段）
要するに本発明は、従来、脱硫塔循環タンクの液面上か
ら供給していた吸収剤である石灰石スラリを沈積防止用
攪拌機により生じるスラリ流を利用して、脱硫塔循環タ
ンク下層部だけで貯留スラリと充分に混合させようとす
るものである。(Means for Solving the Problems) In short, the present invention utilizes the slurry flow generated by the agitator for preventing deposition of limestone slurry, which is an absorbent, which was conventionally supplied from above the liquid level of the desulfurization tower circulation tank. The purpose is to sufficiently mix the slurry with the stored slurry only in the lower part of the desulfurization tower circulation tank.
すなわち、本発明は、排ガス中の硫黄酸化物をカルシウ
ム系吸収剤スラリと接触させて吸収除去し、吸収時に生
成した亜硫酸カルシウムを同一塔内で酸化する脱硫塔の
下部に設けられた循環タンクの上層部に酸化用空気を微
細化する酸化用攪拌機を、および該循環タンク下層部に
脱硫塔循環タンク内スラリの固形分が沈積することを防
止するための攪拌機を設けた湿式排煙脱硫装置に吸収剤
スラリを供給するに当たり、該吸収剤スラリを脱硫剤循
環タンク下層の攪拌機により発生する攪拌流に供給する
ことを特徴とする。That is, the present invention uses a circulation tank installed at the bottom of a desulfurization tower that absorbs and removes sulfur oxides in exhaust gas by contacting with a calcium-based absorbent slurry, and oxidizes calcium sulfite produced during absorption in the same tower. A wet flue gas desulfurization equipment equipped with an oxidizing agitator in the upper part of the circulation tank to atomize the oxidizing air, and an agitator in the lower part of the circulation tank to prevent the solid content of the slurry in the desulfurization tower circulation tank from being deposited. In supplying the absorbent slurry, the absorbent slurry is supplied to an agitation flow generated by a stirrer in the lower layer of the desulfurization agent circulation tank.
（作用）
本発明によれば、石灰石スラリは、沈積防止用攪拌機に
より生じる貯留スラリの噴流中で旋回し゛つう貯留スラ
リと混合されるとともに、脱硫塔循環タンク内に生じる
水平循環流により沈積防止用攪拌機による噴流のおよば
ない個所にも拡散させｇことができ、しかも新鮮な石灰
石スラリか脱硫塔循環タンク上層部の低ｐＨ域を通過す
ることはないため、低ｐＨ域は亜硫酸カルシウムの酸化
に好適な状態を保ち得る。(Function) According to the present invention, the limestone slurry is mixed with the stored slurry by swirling in the jet of the stored slurry generated by the agitator for preventing sedimentation, and the horizontal circulation flow generated in the desulfurization tower circulation tank is used to prevent sedimentation. The low pH range is suitable for the oxidation of calcium sulfite because it can be diffused into areas that cannot be reached by the jet stream from the agitator, and fresh limestone slurry does not pass through the low pH range of the upper layer of the desulfurization tower circulation tank. can remain in good condition.
（実施例）
以下、本発明を図面に示す実施例により詳細に説明する
。(Example) Hereinafter, the present invention will be explained in detail with reference to Examples shown in the drawings.
第１図は、本発明方法に用いる代表的な湿式排煙脱硫装
置の説明図である。図において、脱硫塔への排ガス流入
、硫黄酸化物の除去、吸収、石膏生成および回収のシス
テムは第３図の従来装置と同一であるため説明を省略す
る。従来装置と異なる点は、脱硫塔下部循環タンク側壁
に設けられた沈積防止用攪拌機１２の背部に石灰石スラ
リ２０の供給管２０Ａを設けたことである。FIG. 1 is an explanatory diagram of a typical wet flue gas desulfurization apparatus used in the method of the present invention. In the figure, the systems for the inflow of exhaust gas into the desulfurization tower, the removal and absorption of sulfur oxides, and the production and recovery of gypsum are the same as those of the conventional apparatus shown in FIG. 3, so their explanation will be omitted. The difference from the conventional device is that a supply pipe 20A for the limestone slurry 20 is provided at the back of the agitator 12 for preventing sedimentation provided on the side wall of the desulfurization tower lower circulation tank.
第１図において、従来は脱硫塔循環タンク４の液面上か
ら脱硫塔２内に供給されていた石灰石スラリ２０は、脱
硫塔循環タンク下部に設けられた沈積防止用攪拌機１２
の背部に設けられた供給管２０Ａからスラリ流の上流側
に供給される。In FIG. 1, limestone slurry 20, which was conventionally supplied into the desulfurization tower 2 from above the liquid level of the desulfurization tower circulation tank 4, is replaced by a sedimentation prevention agitator 12 provided at the bottom of the desulfurization tower circulation tank.
The slurry is supplied to the upstream side of the slurry flow from a supply pipe 20A provided at the back of the slurry.
石灰石スラリ２０は、沈積防止用攪拌機によって生じる
噴流中で、循環タンクと混合されながら脱硫塔循環タン
ク下層において水平方向に循環するスラリ流中に均一拡
散する。The limestone slurry 20 is mixed with the circulation tank in the jet flow generated by the agitator for preventing sedimentation, and is uniformly dispersed in the slurry flow circulating horizontally in the lower layer of the desulfurization tower circulation tank.
第２図に、沈積防止用攪拌機により生ずるスラリ流れを
示す。沈積防止用攪拌機１２は、脱硫塔循環タンク側壁
の法線に対し約１５°の傾きを設けて取り付けられてい
る。タンク下部の水平面内にスラリ流を生じさせ、スラ
リ中の固形分がタンク底に沈積することを防止させるも
ので、上下の循環流の発生は少なく、脱硫塔循環タンク
上層部の低ｐＨスラリ域を良好な状態に保持される。な
お、脱硫塔循環タンク内では、底部から脱硫塔循環ポン
プで保有スラリを抜き出して脱硫塔を循環させるため、
下向流が存在し、上層の低ｐＨ領域で酸化された保有ス
ラリは下層へ移り、注入される石灰石スラリおよび未反
応石灰石スラリによりｐＨを回復する。FIG. 2 shows the slurry flow produced by the anti-sedimentation agitator. The sedimentation prevention agitator 12 is installed with an inclination of about 15° to the normal to the side wall of the desulfurization tower circulation tank. This system generates a slurry flow in the horizontal plane at the bottom of the tank and prevents the solid content in the slurry from settling on the bottom of the tank.There is little circulation flow up and down, and the low pH slurry area in the upper part of the desulfurization tower circulation tank is created. will be kept in good condition. In addition, in the desulfurization tower circulation tank, the slurry is extracted from the bottom by the desulfurization tower circulation pump and circulated through the desulfurization tower.
There is a downward flow and the oxidized retained slurry in the low pH region of the upper layer moves to the lower layer and the pH is restored by the injected limestone slurry and unreacted limestone slurry.
石灰石スラリを沈積防止用攪拌機の上流側に供給する際
の供給管２０Ａ供給口の位置は攪拌羽根の吸込側でも吐
出側でもよく、沈積防止用攪拌機の近傍で攪拌機によっ
てスラリ流の生ずる個所であれば、特に規定されない。When supplying the limestone slurry to the upstream side of the agitator for preventing sedimentation, the supply port of the supply pipe 20A may be located on the suction side or the discharge side of the stirring blade, or at a location near the agitator for preventing sedimentation where a slurry flow is generated by the agitator. In other words, there are no particular regulations.
また、石灰石スラリ供給口の大きさおよび構造について
も特に規定されない。Further, the size and structure of the limestone slurry supply port are not particularly specified.
（発明の効果）
本発明によれば、従来の脱硫塔循環タンクに設置されて
いる沈積防止用攪拌機の攪拌効果を利用し、石灰石スラ
リをタンク下層でタンク内スラリに均一分散できるため
、タンク上層の循環スラリは良好な状態で低ｐＨ域を維
持することができ、脱硫塔循環タンク内で他の装置器材
を追設することなく、亜硫酸カルシウムの酸化効率を向
上させることができる。(Effects of the Invention) According to the present invention, limestone slurry can be uniformly dispersed in the slurry in the tank in the lower layer of the tank by utilizing the stirring effect of the agitator for preventing sedimentation installed in the conventional desulfurization tower circulation tank. The circulating slurry can maintain a low pH range in good condition, and the oxidation efficiency of calcium sulfite can be improved without additionally installing other equipment in the desulfurization tower circulation tank.
第１図は、本発明が通用される湿式排煙脱硫装置の説明
図、第２図は、脱硫塔循環タンク内下層の沈積防止用攪
拌機によるスラリ流線を表す図、第３図は、従来の湿式
排煙脱硫装置の説明図く第４図は、脱硫塔循環タンク内
スラリのｐＨと酸化速度の関係を示す図である。
１・・・排ガス、２・・・脱硫塔、３・・・デミスタ、
４・・・脱硫塔循環タンク、５・・・脱硫塔循環ポンプ
、１１・・・酸化用攪拌機、１２・・・沈積防止用攪拌
機、１３・・・ブリードポンプ、１４・・・シラフナ、
１５・・・石膏タンク、１６・・・石膏ポンプ、１７・
・・遠心分離機、１８・・・石膏、１９・・・濾過水、
２０・・・石灰石スラリ、２０Ａ・・・石灰石゛スラリ
供給管、２１・・・石灰石スラリポンプ。Fig. 1 is an explanatory diagram of a wet flue gas desulfurization equipment to which the present invention is applicable, Fig. 2 is a diagram showing slurry streamlines by a stirrer for preventing sedimentation in the lower layer in the desulfurization tower circulation tank, and Fig. 3 is a diagram showing conventional FIG. 4, which is an explanatory diagram of the wet flue gas desulfurization apparatus, is a diagram showing the relationship between the pH of the slurry in the desulfurization tower circulation tank and the oxidation rate. 1... Exhaust gas, 2... Desulfurization tower, 3... Demister,
4... Desulfurization tower circulation tank, 5... Desulfurization tower circulation pump, 11... Oxidation stirrer, 12... Deposition prevention stirrer, 13... Bleed pump, 14... Shirafuna,
15... Gypsum tank, 16... Gypsum pump, 17.
...Centrifuge, 18...Gypsum, 19...Filtered water,
20... Limestone slurry, 20A... Limestone slurry supply pipe, 21... Limestone slurry pump.
Claims (1)
リと接触させて吸収除去し、吸収時に生成した亜硫酸カ
ルシウムを同一塔内で酸化する脱硫塔の下部に設けられ
た循環タンクの上層部に酸化用空気を微細化する酸化用
攪拌機を、および該循環タンク下層部に脱硫塔循環タン
ク内スラリの固形分が沈積することを防止するための攪
拌機を設けた湿式排煙脱硫装置に吸収剤スラリを供給す
るに当たり、該吸収剤スラリを脱硫剤循環タンク下層の
攪拌機により発生する攪拌流に供給することを特徴とす
る湿式排煙脱硫装置における吸収剤の供給方法。(1) The sulfur oxides in the flue gas are brought into contact with a calcium-based absorbent slurry to be absorbed and removed, and the calcium sulfite produced during absorption is oxidized in the same tower. The absorbent slurry is placed in a wet flue gas desulfurization equipment equipped with an oxidation agitator that atomizes the oxidizing air and an agitator that prevents the solid content of the slurry in the desulfurization tower circulation tank from settling in the lower layer of the circulation tank. A method for supplying an absorbent in a wet flue gas desulfurization apparatus, characterized in that the absorbent slurry is supplied to an agitation flow generated by a stirrer in a lower layer of a desulfurization agent circulation tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307068A JPH084711B2 (en) | 1986-12-23 | 1986-12-23 | Wet flue gas desulfurization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61307068A JPH084711B2 (en) | 1986-12-23 | 1986-12-23 | Wet flue gas desulfurization equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63158119A true JPS63158119A (en) | 1988-07-01 |
| JPH084711B2 JPH084711B2 (en) | 1996-01-24 |
Family
ID=17964658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61307068A Expired - Lifetime JPH084711B2 (en) | 1986-12-23 | 1986-12-23 | Wet flue gas desulfurization equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084711B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271823A (en) * | 1988-09-06 | 1990-03-12 | Babcock Hitachi Kk | Wet desulfurization apparatus for waste gas |
| US9314916B2 (en) | 2012-03-23 | 2016-04-19 | Makita Corporation | Power tool |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5891428U (en) * | 1981-12-15 | 1983-06-21 | 石川島播磨重工業株式会社 | Absorption tower of flue gas desulfurization equipment |
| JPS59230621A (en) * | 1983-06-14 | 1984-12-25 | Mitsubishi Heavy Ind Ltd | Absorbent supply method in exhaust gas treating apparatus |
| JPS61178021A (en) * | 1985-02-05 | 1986-08-09 | Mitsubishi Heavy Ind Ltd | Desulfurization of exhaust fume |
-
1986
- 1986-12-23 JP JP61307068A patent/JPH084711B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5891428U (en) * | 1981-12-15 | 1983-06-21 | 石川島播磨重工業株式会社 | Absorption tower of flue gas desulfurization equipment |
| JPS59230621A (en) * | 1983-06-14 | 1984-12-25 | Mitsubishi Heavy Ind Ltd | Absorbent supply method in exhaust gas treating apparatus |
| JPS61178021A (en) * | 1985-02-05 | 1986-08-09 | Mitsubishi Heavy Ind Ltd | Desulfurization of exhaust fume |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0271823A (en) * | 1988-09-06 | 1990-03-12 | Babcock Hitachi Kk | Wet desulfurization apparatus for waste gas |
| US9314916B2 (en) | 2012-03-23 | 2016-04-19 | Makita Corporation | Power tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH084711B2 (en) | 1996-01-24 |
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