JPH04100516A - Method and apparatus for treating exhaust gas - Google Patents
Method and apparatus for treating exhaust gasInfo
- Publication number
- JPH04100516A JPH04100516A JP2215842A JP21584290A JPH04100516A JP H04100516 A JPH04100516 A JP H04100516A JP 2215842 A JP2215842 A JP 2215842A JP 21584290 A JP21584290 A JP 21584290A JP H04100516 A JPH04100516 A JP H04100516A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- plasma
- oxygen
- denitrification
- denitration
- 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 7
- 239000007789 gas Substances 0.000 claims abstract description 40
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 238000005987 sulfurization reaction Methods 0.000 claims description 11
- 238000006477 desulfuration reaction Methods 0.000 abstract description 5
- 230000023556 desulfurization Effects 0.000 abstract description 5
- 230000003009 desulfurizing effect Effects 0.000 abstract 1
- 238000009832 plasma treatment Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/10—Capture or disposal of greenhouse gases of nitrous oxide (N2O)
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はボイラ、各種エンジン、ガスタービン、その他
各種燃焼装置及びＮＯｘ 、 Ｎ２０ 、 ＳＯＸを含
むガスを排出する装置からの排ガスをプラズマ放電を利
用して脱硝、脱硫する方法及び装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention utilizes plasma discharge to discharge exhaust gas from boilers, various engines, gas turbines, other various combustion devices, and devices that discharge gases containing NOx, N20, and SOX. The present invention relates to a method and apparatus for denitrification and desulfurization.
従来のプラズマ放電を利用した脱硝、脱硫（以下、脱硝
硫という）システムの一例を第２図によって説明する。An example of a conventional denitrification and desulfurization (hereinafter referred to as denitrification and sulfurization) system using plasma discharge will be explained with reference to FIG.
ボイラ、タービン、各種エンジンなどの排ガス発生源１
より排出されたＮＯＸ 、 Ｎ２０ 、 ＳＯＸを含ん
だ排ガスを排ガス発生源１出口から大気放出するまでの
過程において、プラズマ脱硝硫装置２に導き、プラズマ
放電によりＮＯＸ 、 ＮａＯ、ＳＯｘを分解除去後、
大気には放出するようにしていた。Exhaust gas generation sources such as boilers, turbines, and various engines 1
In the process of exhaust gas containing NOX, N20, and SOx emitted from the exhaust gas generation source 1 to be released into the atmosphere from the exhaust gas generation source 1 exit, the exhaust gas is led to the plasma denitrification and sulfurization device 2, and after decomposing and removing NOX, NaO, and SOx by plasma discharge,
It was supposed to be released into the atmosphere.
プラズマ脱硝硫装置とは、排ガスに一定周波数の高電圧
を印加し、大気圧グロー放電現象で排ガスをプラズマ化
する装置であり、電界によって加速された高エネルギー
電子が排ガス中の分子と衝突し、励起分子、励起原子、
遊離基、イオン及び中性粒子などが生成され、除去しよ
うとするＮＯｘ 、 Ｎ２０ 、 ＳＯＸ等も励起状態
となる。Plasma denitrification and sulfurization equipment is a device that applies a high voltage at a constant frequency to exhaust gas and turns the exhaust gas into plasma through an atmospheric pressure glow discharge phenomenon.High-energy electrons accelerated by an electric field collide with molecules in the exhaust gas, excited molecules, excited atoms,
Free radicals, ions, neutral particles, etc. are generated, and NOx, N20, SOX, etc. to be removed also become excited.
このように化学的に活性状態となった原子、分子は複雑
な反応をおこした結果、Ｎ２と０．となると考えられて
いる。The atoms and molecules that have become chemically active in this way undergo a complex reaction, resulting in N2 and 0. It is thought that.
従来のプラズマ脱硝硫技術では、排ガス中の酸素濃度が
高いと脱硝効率が低く、所定の高い脱硝効率を確保する
のが困難であった。In conventional plasma denitrification and sulfur technology, the denitrification efficiency is low when the oxygen concentration in the exhaust gas is high, making it difficult to ensure a predetermined high denitrification efficiency.
本発明は上記技術水準に鑑み、プラズマ脱硝硫技術にお
ける脱硝効率を向上させた排ガスの処理方法及び装置を
提供しようとするものである。In view of the above-mentioned state of the art, the present invention aims to provide an exhaust gas treatment method and apparatus that improve the denitrification efficiency in plasma denitrification and sulfurization technology.
本発明は
（１）処理対象排ガス中の酸素濃度を５％以下に制御し
た後、該排ガスをプラズマ放電により脱硝硫することを
特徴とする排ガス処理方法。The present invention provides (1) an exhaust gas treatment method characterized by controlling the oxygen concentration in the exhaust gas to be treated to 5% or less, and then denitrifying and sulfurizing the exhaust gas by plasma discharge.
（２）処理対象排ガス中の酸素濃度を５％以下に制御す
るだめの酸素除去装置を、プラズマ放電脱硝硫装置の上
流側に配置してなることを特徴とする排ガス処理装置。(2) An exhaust gas treatment device characterized in that an oxygen removal device for controlling the oxygen concentration in the exhaust gas to be treated to 5% or less is arranged upstream of the plasma discharge denitrification and sulfurization device.
である。It is.
すなわち、本発明はプラズマ脱硝硫手段の上流側に排ガ
ス中の酸素濃度を低く制御する手段を設け、所定の高い
脱硝効率を確保するものである。具体的には、プラズマ
脱硝研装置の上流側に助燃装置、燃焼装置、酸素分離装
置又は酸素吸収装置のような酸素除去装置を設け、プラ
ズマ脱硝硫装置人口酸素濃度を低く制御しようとするも
のである。That is, the present invention provides means for controlling the oxygen concentration in the exhaust gas to a low level upstream of the plasma denitrification and sulfurization means to ensure a predetermined high denitrification efficiency. Specifically, an oxygen removal device such as an auxiliary combustion device, a combustion device, an oxygen separation device, or an oxygen absorption device is installed on the upstream side of the plasma denitrification and sulfurization equipment to control the artificial oxygen concentration of the plasma denitrification and sulfur equipment to a low level. be.
プラズマ脱硝硫装置人口酸素濃度を低く制御するため、
常に高い脱硝効率を確保することができる。In order to control the artificial oxygen concentration of plasma denitrification and sulfurization equipment to a low level,
High denitrification efficiency can always be ensured.
例えば第２図、第３図に示すように排ガス中の酸素濃度
が５％程度だとＮＯｘ （含むＮｏ）の除去効率は１
０％程度（第２図参照）、Ｎ２０の除去効率は５％程度
（第３図参照）と低い値であるが、両者共酸素濃度が低
くなるとともに飛躍的にその除去効率が上昇する。For example, as shown in Figures 2 and 3, when the oxygen concentration in the exhaust gas is around 5%, the NOx (including NO) removal efficiency is 1.
Although the removal efficiency of N20 is low at about 0% (see FIG. 2) and about 5% (see FIG. 3), the removal efficiency of both increases dramatically as the oxygen concentration decreases.
本発明の一実施例を第１図によって説明する。 An embodiment of the present invention will be described with reference to FIG.
排ガス発生源１から発生した排ガスはプラズマ脱硝研装
置２に導入される前に、−旦、助燃装置、燃焼装置、酸
素分離装置又は酸素吸収装置などのような酸素除去装置
３に導入され、その後プラズマ脱硝硫装置２に導入し、
ＮＯＸ 。Before the exhaust gas generated from the exhaust gas generation source 1 is introduced into the plasma denitrification equipment 2, it is first introduced into an oxygen removal device 3 such as an auxiliary combustion device, a combustion device, an oxygen separation device, or an oxygen absorption device, and then Introduced into plasma denitrification and sulfurization equipment 2,
NOX.
Ｎ、Ｏ、ＳＯｘを分解除去後排ガスは大気に放出される
。After decomposing and removing N, O, and SOx, the exhaust gas is released into the atmosphere.
この実施例では、プラズマ脱硝研装置２に導入される排
ガス中の酸素濃度、すなわち酸素除去装置３の出口酸素
濃度を、プラズマ脱硝研装置２の上流側に設置した酸素
濃度計４にて検出し、常に５％程度以下になるように制
御する。In this embodiment, the oxygen concentration in the exhaust gas introduced into the plasma denitrification equipment 2, that is, the oxygen concentration at the outlet of the oxygen removal equipment 3, is detected by the oxygen concentration meter 4 installed upstream of the plasma denitrification equipment 2. , is controlled so that it is always about 5% or less.
この実施例において、プラズマ脱硝研装置２の上流側に
酸素除去装置３を設けたことにより、プラズマ脱硝研装
置２に導入される排ガス中の酸素濃度を５％程度以下に
制御することができることから、常に所定の高い脱硝効
率（脱ＮＯｘ 。In this embodiment, by providing the oxygen removal device 3 upstream of the plasma denitrification device 2, the oxygen concentration in the exhaust gas introduced into the plasma denitrification device 2 can be controlled to about 5% or less. , always a predetermined high denitrification efficiency (NOx removal.
脱Ｎ、０）を確保することができる。(N, 0) can be ensured.
以上に説明したように本発明は次の効果を奏する。 As explained above, the present invention has the following effects.
（１） プラズマ脱硝研装置に導入される排ガス中の
酸素濃度を５％程度以下になることにより、非常に高い
脱硝効率（脱ＮＯＸ 、脱Ｎ２０）を確保することがで
きる。(1) By reducing the oxygen concentration in the exhaust gas introduced into the plasma denitrification equipment to about 5% or less, extremely high denitrification efficiency (NOx removal, N20 removal) can be ensured.
（２） プラズマによる排ガス処理に要する消費動力
を軽減することができる。(2) Power consumption required for exhaust gas treatment using plasma can be reduced.
（３）酸素除去装置として、酸素吸収装置、酸素吸収装
置を用いた場合、これらから回収した酸素は排ガス派生
源に導入される空気に放出することにより酸素供給効率
が大幅に上昇し、空気消費量を軽減できる。(3) When using an oxygen absorption device or an oxygen absorption device as an oxygen removal device, the oxygen recovered from these devices is released into the air introduced into the exhaust gas source, greatly increasing the oxygen supply efficiency and reducing air consumption. The amount can be reduced.
第１図は本発明の詳細な説明図、第２図及び第３図は夫
々排ガス中の酸素濃度と排ガス中のＮ［］Ｘ及びＮ２０
の低減率との関係を示す図表、第４図は従来のプラズマ
放電による脱硝硫の態様の説明図である。Figure 1 is a detailed explanatory diagram of the present invention, Figures 2 and 3 are the oxygen concentration in the exhaust gas, N[]X and N20 in the exhaust gas, respectively.
FIG. 4 is an explanatory diagram of the mode of denitrification and sulfurization by conventional plasma discharge.
Claims (2)
た後、該排ガスをプラズマ放電により脱硝硫することを
特徴とする排ガス処理方法。(1) An exhaust gas treatment method characterized by controlling the oxygen concentration in the exhaust gas to be treated to 5% or less, and then denitrifying and sulfurizing the exhaust gas by plasma discharge.
るための酸素除去装置を、プラズマ放電脱硝硫装置の上
流側に配置してなることを特徴とする排ガス処理装置。(2) An exhaust gas treatment device characterized in that an oxygen removal device for controlling the oxygen concentration in the exhaust gas to be treated to 5% or less is arranged upstream of the plasma discharge denitrification and sulfurization device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215842A JPH04100516A (en) | 1990-08-17 | 1990-08-17 | Method and apparatus for treating exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2215842A JPH04100516A (en) | 1990-08-17 | 1990-08-17 | Method and apparatus for treating exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04100516A true JPH04100516A (en) | 1992-04-02 |
Family
ID=16679173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2215842A Pending JPH04100516A (en) | 1990-08-17 | 1990-08-17 | Method and apparatus for treating exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04100516A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001314730A (en) * | 2000-05-11 | 2001-11-13 | E Tec:Kk | METHOD AND DEVICE FOR REDUCING NOx |
-
1990
- 1990-08-17 JP JP2215842A patent/JPH04100516A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001314730A (en) * | 2000-05-11 | 2001-11-13 | E Tec:Kk | METHOD AND DEVICE FOR REDUCING NOx |
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