JPH03213124A - Desulfurizing method - Google Patents
Desulfurizing methodInfo
- Publication number
- JPH03213124A JPH03213124A JP2008586A JP858690A JPH03213124A JP H03213124 A JPH03213124 A JP H03213124A JP 2008586 A JP2008586 A JP 2008586A JP 858690 A JP858690 A JP 858690A JP H03213124 A JPH03213124 A JP H03213124A
- Authority
- JP
- Japan
- Prior art keywords
- desulfurization
- exhaust gas
- ash
- slurry
- dust collector
- 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
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000003009 desulfurizing effect Effects 0.000 title description 2
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 42
- 230000023556 desulfurization Effects 0.000 claims abstract description 42
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims abstract description 14
- 235000019738 Limestone Nutrition 0.000 claims abstract description 12
- 239000006028 limestone Substances 0.000 claims abstract description 12
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000007921 spray Substances 0.000 abstract description 4
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 238000010304 firing Methods 0.000 abstract 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 16
- 239000002956 ash Substances 0.000 description 11
- 235000012255 calcium oxide Nutrition 0.000 description 8
- 239000000292 calcium oxide Substances 0.000 description 8
- 239000011575 calcium Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000011508 lime plaster Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Chimneys And Flues (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は事業用・産業用ボイラ等に適用される脱硫方法
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a desulfurization method applied to commercial/industrial boilers and the like.
従来の石灰石投入による脱硫法には、炉内に直接石灰石
を投入する炉内脱硫法１石灰石等のアルカリ成分をスラ
リー化し、気液接触反応により石膏を得る石灰−石膏法
、そして排ガス中に石灰石のアルカリ成分スラリーを噴
霧しＳＯｘを吸収させフライアッシュとともに除塵回収
する半乾式脱硫法がある。Conventional desulfurization methods using limestone include an in-furnace desulfurization method in which limestone is directly introduced into the furnace, a lime-gypsum method in which alkaline components such as limestone are slurried, and gypsum is obtained through a gas-liquid contact reaction, and limestone is added to the exhaust gas. There is a semi-dry desulfurization method in which an alkali component slurry is sprayed to absorb SOx and collect it together with fly ash by removing dust.
従来の脱硫方法として炉内脱硫法及び石灰石膏法がある
が、炉内脱硫法は設備が簡潔で低コストではあるが、脱
硫効率が低く１石灰石膏法は脱硫効率は高いが、設備が
複雑で高コストであるという欠点があった。又半乾式脱
硫法ではＣａＯ或はＣａ（ＯＨ）−を必要とする欠点が
あった。Conventional desulfurization methods include the in-furnace desulfurization method and the lime plaster method, but the in-furnace desulfurization method requires simple equipment and is low cost, but has low desulfurization efficiency.1 The lime plaster method has high desulfurization efficiency, but the equipment is complicated. The disadvantage was that it was expensive. Furthermore, the semi-dry desulfurization method has the disadvantage of requiring CaO or Ca(OH)-.
本発明は上記欠点を解決することを目的とする。The present invention aims to solve the above-mentioned drawbacks.
高効率でかつ低コストなシステムとする為。 To create a highly efficient and low cost system.
本発明は炉内脱硫とボイラ後流での脱硫処理を組み合わ
せる。その際、ボイラ後流での脱硫処理は集塵装置より
回収される灰をスラリー輸送し、ボイラ出口でスプレィ
噴霧する事により灰中ＣａＯを用いて再度脱硫を行う。The present invention combines in-furnace desulfurization and desulfurization treatment downstream of the boiler. At this time, the desulfurization treatment downstream of the boiler is carried out by transporting the ash collected from the dust collector as a slurry and spraying it at the boiler outlet to perform desulfurization again using CaO in the ash.
この為半乾式脱硫法の様にＣａＯやＣａ （ＯＨｂの供
給は必要なく高効率でかつシステムの簡素な低コスト脱
硫システムとなる。Therefore, unlike the semi-dry desulfurization method, there is no need to supply CaO or Ca(OHb), resulting in a highly efficient, simple, and low-cost desulfurization system.
炉内脱硫（−次脱硫）とボイラ後流での脱硫（二次脱硫
）を組み合わせる炉内脱硫に使用するＣａＣ０−Ｃ石灰
石〕は炉内の高温により熱分解しアルカリ度の高いＣａ
ＯＣ生石灰〕になる。このＣａＯにより炉内脱硫を行う
が、これらＣａＯのうち未反応分を集塵装置にて灰とと
もに回収し。The CaC0-C limestone used for in-furnace desulfurization, which combines in-furnace desulfurization (-secondary desulfurization) and desulfurization downstream of the boiler (secondary desulfurization), is thermally decomposed by the high temperature inside the furnace and becomes highly alkaline Ca.
OC quicklime]. This CaO is used to perform in-furnace desulfurization, and the unreacted portion of this CaO is collected together with the ash in a dust collector.
これをスラリー化する事により脱硫効果の高いＣａ（Ｏ
Ｈ）＝とし再利用して二次脱硫を行う。By turning this into a slurry, Ca(O) has a high desulfurization effect.
H)= and reused to perform secondary desulfurization.
この際集塵装置で回収した灰の再循環量又は再循環割合
を調整する事により、脱硫効率の制御を行う事ができる
。又、電気集塵器を適用する場合は回収側（再循環側）
と廃棄側の量の調整を荷電調整で行うこともできる。At this time, the desulfurization efficiency can be controlled by adjusting the recirculation amount or recirculation ratio of the ash collected by the dust collector. In addition, if an electrostatic precipitator is applied, the collection side (recirculation side)
The amount on the waste side can also be adjusted by adjusting the charge.
次に本発明方法の一実施例を図面に基づいて説明する。 Next, an embodiment of the method of the present invention will be described based on the drawings.
第１図において、ボイラ火炉１に設置された石灰石投入
口２より石灰石を投入する事により、炉内脱硫（−次脱
硫）を行う。ボイラ火炉１より排出されたボイラ排ガス
は排ガスダクト３を経てスプレィドライヤ４に至る。ス
プレィドライヤ４では再循環された灰スラリーが、スラ
リー噴射ノズル１０より噴射され二次脱硫を行う。スプ
レィドライヤ４を出た排ガスは集塵装置５に至り、除塵
された排ガスは集塵装置出口ダクト１１より排出される
。回収された灰は灰排出系統６を経て灰サイロ等に送ら
れるが、一部は灰循環系統７に再循環されスラリー貯槽
８．スラリー貯槽グ９を経てスラリー噴射ノズル１０よ
り噴射される。尚集塵装置１１より排出された排ガスは
、ガス−ガスヒータにより排ガスダクト３通過ガスと熱
交換し、昇温する事も可能である。In FIG. 1, in-furnace desulfurization (-subsequent desulfurization) is performed by charging limestone from a limestone inlet 2 installed in a boiler furnace 1. Boiler exhaust gas discharged from the boiler furnace 1 passes through an exhaust gas duct 3 and reaches a spray dryer 4. In the spray dryer 4, the recirculated ash slurry is injected from a slurry injection nozzle 10 to perform secondary desulfurization. The exhaust gas leaving the spray dryer 4 reaches the dust collector 5, and the dust-removed exhaust gas is discharged from the dust collector outlet duct 11. The collected ash is sent to an ash silo etc. through an ash discharge system 6, but a portion is recirculated to an ash circulation system 7 and sent to a slurry storage tank 8. The slurry is injected from a slurry injection nozzle 10 through a slurry storage tank 9. The exhaust gas discharged from the dust collector 11 can also be heated by exchanging heat with the gas passing through the exhaust gas duct 3 by a gas-gas heater.
以上のように９本発明によれば、ボイラ後流での脱硫処
理は、集塵装置より回収される灰をスラリー輸送し、ボ
イラ出口でスプレィ噴霧する事により、灰中ＣａＯを用
いて再度脱硫を行う。As described above, according to the present invention, the desulfurization treatment downstream of the boiler is carried out by transporting the ash collected from the dust collector as a slurry and spraying it at the boiler outlet, thereby desulfurizing it again using CaO in the ash. I do.
この為、未反応カルシウムの利用率が高まり高効率でか
つ吸収剤（石灰石）消費量の低減が可能な脱硫システム
となる。従って半乾式脱硫法の様にＣａＯやＣａ （Ｏ
Ｈ）富の供給は必要なく高効率でシステムの簡素な低コ
スト脱硫システムとなる。Therefore, the utilization rate of unreacted calcium increases, resulting in a highly efficient desulfurization system that can reduce the amount of absorbent (limestone) consumed. Therefore, as in the semi-dry desulfurization method, CaO and Ca(O
H) A high efficiency, simple and low cost desulfurization system is achieved without the need for a wealth supply.
第１図は１本発明の第１実施例に係る脱硫方法の系統図
である。
；−，埋火石川 新FIG. 1 is a system diagram of a desulfurization method according to a first embodiment of the present invention. ；−，Arata Ubi Ishikawa
Claims (1)
に設けられた集塵装置で回収した灰を同集塵装置上流側
へ再循環し、スラリーの状態で排ガスに噴霧する事によ
り二次脱硫させる事を特徴とする脱硫方法。After primary desulfurization in the boiler furnace by introducing limestone, the ash collected by the dust collector installed in the exhaust gas path is recirculated upstream of the dust collector and is sprayed into the exhaust gas in the form of slurry for secondary desulfurization. A desulfurization method characterized by:
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008586A JPH03213124A (en) | 1990-01-18 | 1990-01-18 | Desulfurizing method |
| DE19914101439 DE4101439A1 (en) | 1990-01-18 | 1991-01-17 | Combustion gas desulphurisation within furnace - followed by wet desulphurisation of off-gas |
| PL28874291A PL165487B1 (en) | 1990-01-18 | 1991-01-17 | Method of desulfurizing combustion gases inside a furnace |
| AT10891A AT400409B (en) | 1990-01-18 | 1991-01-18 | METHOD FOR INTERNAL DESULFURATION IN THE FIREPLACE |
| CN 91100881 CN1018670B (en) | 1990-01-18 | 1991-01-18 | Process for intrafurnace desulfurization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008586A JPH03213124A (en) | 1990-01-18 | 1990-01-18 | Desulfurizing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03213124A true JPH03213124A (en) | 1991-09-18 |
Family
ID=11697103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008586A Pending JPH03213124A (en) | 1990-01-18 | 1990-01-18 | Desulfurizing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03213124A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180074347A (en) * | 2016-12-23 | 2018-07-03 | 주식회사 포스코 | Method for flue gas desulfurization using kanvara reactor powder and flue gas desulfurization apparatus using the same |
| CN110585878A (en) * | 2019-09-11 | 2019-12-20 | 林秋萍 | Waste gas desulfurization dust collector is used in tombarthite production |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58150416A (en) * | 1982-03-03 | 1983-09-07 | Sumitomo Heavy Ind Ltd | Treatment of exhaust gas |
-
1990
- 1990-01-18 JP JP2008586A patent/JPH03213124A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58150416A (en) * | 1982-03-03 | 1983-09-07 | Sumitomo Heavy Ind Ltd | Treatment of exhaust gas |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180074347A (en) * | 2016-12-23 | 2018-07-03 | 주식회사 포스코 | Method for flue gas desulfurization using kanvara reactor powder and flue gas desulfurization apparatus using the same |
| CN110585878A (en) * | 2019-09-11 | 2019-12-20 | 林秋萍 | Waste gas desulfurization dust collector is used in tombarthite production |
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