JPH03161021A - Treatment of exhaust gas containing sulfur oxide - Google Patents
Treatment of exhaust gas containing sulfur oxideInfo
- Publication number
- JPH03161021A JPH03161021A JP1297701A JP29770189A JPH03161021A JP H03161021 A JPH03161021 A JP H03161021A JP 1297701 A JP1297701 A JP 1297701A JP 29770189 A JP29770189 A JP 29770189A JP H03161021 A JPH03161021 A JP H03161021A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- bag filter
- sulfur oxide
- calcium
- caso4
- 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.)
- Pending
Links
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 title claims abstract description 23
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 title abstract description 7
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 17
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 14
- 239000001110 calcium chloride Substances 0.000 claims abstract description 13
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 13
- 235000010261 calcium sulphite Nutrition 0.000 claims abstract description 10
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims abstract description 9
- 239000000920 calcium hydroxide Substances 0.000 claims abstract description 9
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 25
- 229910052815 sulfur oxide Inorganic materials 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 6
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 claims description 6
- 229910000041 hydrogen chloride Inorganic materials 0.000 claims description 6
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 abstract description 7
- 238000004065 wastewater treatment Methods 0.000 abstract description 4
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 235000011148 calcium chloride Nutrition 0.000 abstract 5
- 229910052925 anhydrite Inorganic materials 0.000 abstract 4
- 235000011116 calcium hydroxide Nutrition 0.000 abstract 3
- 239000007864 aqueous solution Substances 0.000 description 8
- 239000011575 calcium Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、燃焼炉、加熱炉等の硫黄酸化物を含有する排
ガスの処理方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for treating exhaust gas containing sulfur oxides from combustion furnaces, heating furnaces, etc.
従来、硫黄酸化物含有排ガスは、アルカリ性水溶液（例
えば水酸化カルシウム水溶液あるいは苛性ソーダ水溶液
）で洗浄する湿式法が主として採用されていた。Conventionally, a wet method in which sulfur oxide-containing exhaust gas is washed with an alkaline aqueous solution (for example, a calcium hydroxide aqueous solution or a caustic soda aqueous solution) has been mainly adopted.
従来の前記の湿式法は、排水処理が二次的に必要となる
上に、排ガス中にダストが含１れると、湿式スクラバー
の前段に集じん器を設置する必要があシ、大がかりな設
備が必要であった。The conventional wet method described above requires secondary wastewater treatment, and if dust is included in the exhaust gas, it is necessary to install a dust collector before the wet scrubber, requiring large-scale equipment. was necessary.
本発明は、排水処理設備を不要とし、かつ排ガス中の硫
黄酸化物を安定した化合物として回収・除去することが
できる硫黄酸化物を含有する排ガスの乾式の処理方法を
提供しようとするものである。The present invention aims to provide a dry treatment method for exhaust gas containing sulfur oxides, which does not require wastewater treatment equipment and can recover and remove sulfur oxides in the exhaust gas as stable compounds. .
本発明の硫黄酸化物を含有する排ガスの処理方法は、硫
黄酸化物を含有する排ガス中に塩化カルシウム水溶液を
噴射して硫黄酸化物を亜硫酸カルシウムｍ硫酸カルシウ
ムの粉体状の生成物と塩化水素に変換した後、排ガス中
に水酸化カルシウムの粉体を噴射した上排ガスをバグフ
ィルタに導入してバグフィルタ上で塩化水素を水酸化カ
ルシウムを反応させて塩化カルシウムに変換すると共に
前記亜硫酸カルシウムと硫酸カルシウム及び該塩化カル
シウムをバグフィルタで捕集することを特徴とする。The method for treating exhaust gas containing sulfur oxides of the present invention involves injecting an aqueous solution of calcium chloride into the exhaust gas containing sulfur oxides to convert sulfur oxides into powdered products of calcium sulfite m calcium sulfate and hydrogen chloride. After injecting calcium hydroxide powder into the exhaust gas, the exhaust gas is introduced into a bag filter, where hydrogen chloride is reacted with calcium hydroxide to convert it into calcium chloride, and the calcium sulfite and calcium sulfite are converted into calcium chloride. The method is characterized in that calcium sulfate and the calcium chloride are collected using a bag filter.
本発明は、乾式法で排ガス中の硫黄酸化物を処理するた
めに、先づ硫黄酸化物を含有する排ガス中に塩化カルシ
ウム（ＣａＣＪ２ｔ） 水溶液を噴射して、次式によう
反応させ粉体状の亜硫酸カルシウム（ｃａｓｏｓ）及び
硫酸カルシウム（ＣａＳＯ４）を得る。In order to treat sulfur oxides in exhaust gas using a dry method, the present invention first injects an aqueous solution of calcium chloride (CaCJ2t) into the exhaust gas containing sulfur oxides, reacts with the following formula, and forms a powder. of calcium sulfite (casos) and calcium sulfate (CaSO4) are obtained.
Ｓｏｔ ＋ Ｃ ａＣ ｊｌｔ ＋Ｈｓ Ｏ−＋Ｃ ａ
ＳＯｓ ＋ ２ＨＣ ｎＳＯｓ＋ＣａＣｊｌｔ＋＆Ｏ
−＋ＣａＳＯ４＋２ＨＣｊ！次に、排ガス中に水酸化カ
ルシウム（Ｃａ（ＯＨ）＊ ）の粉体な噴射し、バグフ
ィルタ上で前段階で生成した塩化水素（ＨＣＩ）をＣ
ａ （ ＯＨ ）ｔで中和させて塩化カルシウム（ｃａ
ｃｘｔ） に変換すると共に、前段階で生成されたＣ
ａ Ｓ Ｏ ｚ ＋ Ｃ ａ Ｓ ０４をＣ ａ Ｃ
Ｈｚ と共にバグフィルタによって捕集する。Sot + C aC jlt +Hs O-+C a
SOs + 2HC nSOs + CaCjlt + &O
-+CaSO4+2HCj! Next, powdered calcium hydroxide (Ca(OH)*) is injected into the exhaust gas, and the hydrogen chloride (HCI) generated in the previous stage is removed by carbonization on the bag filter.
Calcium chloride (ca
cxt) and the C generated in the previous step.
a S O z + C a S 04 C a C
Hz and collected by a bag filter.
前記の２段の反応を組み合わせることによう１高効率で
経済的な乾式処理が可能となった。By combining the two-stage reactions described above, highly efficient and economical dry processing has become possible.
本発明の一実施例を第１図に示す。 An embodiment of the present invention is shown in FIG.
石炭焚ボイラ１より゜排出される硫黄酸化物を含有する
排ガスＧは，蒸発反応塔２へ入る。蒸発反応塔２へは，
夕冫ク４に貯蔵されたＣＪＬＣＡ，水溶液Ａがボンプ６
によってライン８を経て定量噴射され、ここで第１段階
の次の反応が進行して、粉体状のＣａ６０ｓとＣａＳＯ
ａ、及びＨＣｔが生或されると共に排ガスは５０℃〜２
３０℃の範囲まで減温される。Exhaust gas G containing sulfur oxides discharged from the coal-fired boiler 1 enters the evaporation reaction tower 2. To the evaporation reaction tower 2,
CJLCA and aqueous solution A stored in Yuku 4 are transferred to Bomb 6.
is injected in a fixed amount through line 8, where the next reaction of the first stage proceeds, and powdered Ca60s and CaSO
a, and HCt are produced, and the exhaust gas is heated to 50℃~2
The temperature is reduced to a range of 30°C.
ＳＯｓ＋ ＣａＣｔｔ ＋ ＨｔＯ−＋ＣａＳＯｓ ＋
２ＨＣｔＳＯｓ ＋ＣａＣｔｍ＋ＨｓＯ−＋ＣａＳＯ
４＋２ＨＣｔ次に、圧送用ファン７による空気流の吸引
力によってホッパ−５に貯蔵されたＣａ （ ＯＨ ）
ｚ粉体Ｂが、ライン９を経て蒸発反応器２を出る配管１
０中の排ガス中に定量噴射され、その上で排ガスがバグ
フィルタ３に導入される。SOs+ CaCtt + HtO−+CaSOs +
2HCtSOs +CaCtm+HsO−+CaSO
4+2HCt Next, Ca (OH) was stored in the hopper 5 by the suction force of the air flow by the pressure-feeding fan 7.
z Pipe 1 through which powder B exits the evaporation reactor 2 via line 9
A fixed amount is injected into the exhaust gas in the air, and then the exhaust gas is introduced into the bag filter 3.
バグフィルタ３上では、前記の第１段階で生或されたＨ
ＣｔとＣａ（ＯＨ）＊が反応しＣ＆Ｃｌｓとなう、第１
段階で生成されたＣ ａ Ｓ Ｏｓ ｅ Ｃ ａ Ｓ
０４及びバイジンと共にバグフィルタ３上に捕集される
。On the bag filter 3, the H generated in the first stage is
Ct and Ca(OH)* react to form C&Cls, the first
C a S Os e C a S generated in the step
04 and Visin are collected on the bag filter 3.
バグフィルタ３上に捕集されたＣ ａ Ｓ Ｏ＠ ＋
Ｃ ａ Ｓ ０４ ｓＣ ａ Ｃ １，の反応生成物と
パイジンは定期的に払い落とされ回収物Ｃとして排出さ
れる。C a SO @ + collected on bag filter 3
The reaction products of C a S 04 sC a C 1 and Pyzine are periodically brushed off and discharged as recovered material C.
以上の通り、本実施例では、乾式によって排ガス中の硫
黄酸化物を、Ｃ ａ Ｃ １＠水溶液とＣａ（ＯＨ）ｔ
によって、安定したＣａＳＯｓ， ｃａｓｏ４， Ｃａ
ＣＪ２ｔとしてこれをバグフィルタ３で捕集し、排ガス
の硫黄酸化物を除去することができる。As described above, in this example, sulfur oxides in exhaust gas are removed by dry method using CaC1@aqueous solution and Ca(OH)t
stabilized CaSOs, caso4, Ca
This can be collected as CJ2t by the bag filter 3 to remove sulfur oxides from the exhaust gas.
以上説明したように、本発明は、排ガス中の硫黄酸化物
を、ＣａＣｆｔ＊水溶液によって、粉体状のＣａＳＯｓ
とＣａＳＯ４、及びＨＣｊ＆ に変換した後、バグフ
ィルタ上にかいて、ＭＣＩをＣａ（ＯＨ）＊粉体に吸収
することによって、最終的には安定反化合物であるＣ
ａ Ｓ Ｏｓ ＊ Ｃ ａ Ｓ ０４及びＣａＣＪ！，
として確実に回収することができる。・このように、本
発明は、従来の湿式法と異な９、排水処理を全く必要と
しない経済的に優れた硫黄酸化物を含有する排ガス乾式
処理を行なうことができる。As explained above, the present invention removes sulfur oxides in exhaust gas by using CaCft* aqueous solution in the form of powdered CaSOs.
After converting into CaSO4 and HCj&, MCI is absorbed into Ca(OH)* powder by passing it on a bag filter, and finally the stable anticompound C
aS Os * C a S 04 and CaCJ! ，
can be reliably recovered. - In this way, the present invention can perform an economically superior dry treatment of exhaust gas containing sulfur oxides that does not require any wastewater treatment, unlike conventional wet methods.
第１図は本発明の一実施例の系統図である。
１・・・石炭焚ボイラ、２・・・蒸発反応塔、３・・・
バグフィルタ、４・・・タンク、５・・・ホツパー Ｇ
・・・排ガス、Ａ ・・・Ｃ ａ Ｃ ｆａｔ水溶液、
Ｂ ・” Ｃａ （ＯＨ）２粉体。FIG. 1 is a system diagram of an embodiment of the present invention. 1... Coal-fired boiler, 2... Evaporation reaction tower, 3...
Bag filter, 4... Tank, 5... Hopper G
...Exhaust gas, A ...C a C fat aqueous solution,
B ・” Ca (OH)2 powder.
Claims (1)
液を噴射して硫黄酸化物を亜硫酸カルシウムと硫酸カル
シウムの粉体状の生成物と塩化水素に変換した後、排ガ
ス中に水酸化カルシウムの粉体をした上排ガスをバグフ
イルタに導入して、バグフイルタ上で塩化水素と水酸化
カルシウムを反応させて塩化カルシウムに変換すると共
に前記亜硫酸カルシウムと硫酸カルシウム及び該塩化カ
ルシウムをバグフイルタで捕集することを特徴とする硫
黄酸化物を含有する排ガスの処理方法。After injecting an aqueous calcium chloride solution into the exhaust gas containing sulfur oxides to convert the sulfur oxides into powdered products of calcium sulfite and calcium sulfate and hydrogen chloride, powdered calcium hydroxide is added to the exhaust gas. The above exhaust gas is introduced into a bag filter, and hydrogen chloride and calcium hydroxide are reacted on the bag filter to convert it into calcium chloride, and the calcium sulfite, calcium sulfate, and the calcium chloride are collected by the bag filter. A method for treating exhaust gas containing sulfur oxides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297701A JPH03161021A (en) | 1989-11-17 | 1989-11-17 | Treatment of exhaust gas containing sulfur oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1297701A JPH03161021A (en) | 1989-11-17 | 1989-11-17 | Treatment of exhaust gas containing sulfur oxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03161021A true JPH03161021A (en) | 1991-07-11 |
Family
ID=17850043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1297701A Pending JPH03161021A (en) | 1989-11-17 | 1989-11-17 | Treatment of exhaust gas containing sulfur oxide |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03161021A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08947A (en) * | 1994-06-16 | 1996-01-09 | Hokkaido Electric Power Co Inc:The | Agent and process for treatment of exhaust gas |
| US5624648A (en) * | 1993-03-12 | 1997-04-29 | Abb Flakt Ab | Method and apparatus for cleaning flue gas |
-
1989
- 1989-11-17 JP JP1297701A patent/JPH03161021A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5624648A (en) * | 1993-03-12 | 1997-04-29 | Abb Flakt Ab | Method and apparatus for cleaning flue gas |
| JPH08947A (en) * | 1994-06-16 | 1996-01-09 | Hokkaido Electric Power Co Inc:The | Agent and process for treatment of exhaust gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4859438A (en) | Method for separation of impurities from flowing gas | |
| TW200808429A (en) | Integrated dry and wet flue gas cleaning process and system | |
| CA1193073A (en) | Process for removal of sulfur oxides from hot gases | |
| CN113083015A (en) | Resource utilization method for flue gas desulfurization slag by semidry process | |
| US5817283A (en) | Method for removing sulfur dioxide and nitrogen oxides from combustion gases | |
| JPS63171621A (en) | Method of purifying waste gas | |
| JPS6135827A (en) | Purification of exhaust gas by dry lime method | |
| JPH03161021A (en) | Treatment of exhaust gas containing sulfur oxide | |
| JPH0521609B2 (en) | ||
| JPS62247826A (en) | Method for removing acidic gas and mercury contained in combustion exhaust gas | |
| KR100225474B1 (en) | Method for removing sulfur dioxide and nitrogen oxides from combustion gases | |
| JPH01155936A (en) | Apparatus for removing acidic component from waste gas of dust incineration furnace | |
| CN208526306U (en) | One kind being based on minimum discharge fume treatment running gear | |
| JP2846064B2 (en) | Exhaust gas desulfurization method and apparatus | |
| JPH08108040A (en) | Waste gas processing agent and treatment of waste gas | |
| CN106621753B (en) | Desulfurization treatment method for ceramic industrial kiln | |
| CN1177516A (en) | Process for removing SO2 and NOx from gaseous stream | |
| JP4120725B2 (en) | Boiler flue gas treatment method and apparatus | |
| CN1187382A (en) | Method for removing sulfur dioxide and nitrogen oxides from combustion gases | |
| JP2024058173A (en) | Exhaust gas treatment apparatus | |
| JPH01176429A (en) | Flue gas desulfurization method accompanied by dehalogenation | |
| CN112591766A (en) | Device and method for removing and utilizing ammonia in ash of coal-fired power plant | |
| KR20200048608A (en) | High-throughput two-stage dry apparatus for removing acidic gas | |
| JPH0773662B2 (en) | Chlorine-containing exhaust gas treatment method | |
| JPH07308540A (en) | Waste gas treatment |