JP2607548B2 - Exhaust gas treatment method - Google Patents
Exhaust gas treatment methodInfo
- Publication number
- JP2607548B2 JP2607548B2 JP62253807A JP25380787A JP2607548B2 JP 2607548 B2 JP2607548 B2 JP 2607548B2 JP 62253807 A JP62253807 A JP 62253807A JP 25380787 A JP25380787 A JP 25380787A JP 2607548 B2 JP2607548 B2 JP 2607548B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- exhaust gas
- radicals
- treatment method
- gas treatment
- 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
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
Landscapes
- Treating Waste Gases (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は排ガス中に含まれるNOX及びSOXを電磁波ある
いは電子ビームを利用して除去する方法に関する。The present invention relates to a method for removing NO X and SO X contained in exhaust gas using an electromagnetic wave or an electron beam.
従来から燃焼排ガス中のNOX,SOX除去方法は多くの方
法が知られているが、なかでもNOXに対しては排ガス中
にアンモニアを注入し、触媒の存在下に接触還元を行う
方法等、乾式の触媒による方法が主流を占めており、ま
た、SOXに対しては吸収液として石灰水溶液を用い、副
生物として石こうを回収する石灰−石こう法による湿式
法等が主流を成している。METHOD NO X in the combustion exhaust gas from a conventional, SO X removal method have been known many methods, ammonia is injected into the exhaust gas for inter alia NO X, perform catalytic reduction in the presence of a catalyst etc., account for the process according to the mainstream dry catalyst, also using lime aqueous solution as an absorbing solution for SO X, lime recovering gypsum as a by-product - a wet process is the main stream by gypsum method ing.
このような従来の排ガスの処理方法では、NOX,SOXの
処理は、それぞれ別々のプロセスで実施され、それぞれ
に固体の脱硝触媒や吸収媒体としての石灰水溶液あるい
は固体吸着剤等が必要であり、さらにまた、脱硝と脱硫
とを複数の段階で行うため、プロセスは複雑となり、し
たがって、使用する機器の点数も多くなり、その結果、
装置費や運転費が多額になるという問題点があった。In such a conventional method for processing an exhaust gas, treatment of NO X, SO X is carried out in each separate processes, it requires lime solution or solid adsorbent such as a solid denitration catalyst and absorbing medium, respectively Furthermore, since the denitration and desulfurization are performed in multiple stages, the process is complicated, and therefore, the number of equipment to be used is increased, and as a result,
There has been a problem that equipment costs and operating costs are large.
本発明は、かかる事情から上記のような従来の排ガス
処理方法の欠点を改良した排ガスの処理方法、すなわ
ち、排ガス中のNOX及びSOXを処理するための触媒や吸収
液及び吸着剤等を必要としないでNOXとSOXとを単一プロ
セスで一段階で処理できる新規なNOX及びSOXの除去方法
を提供することを目的としたものである。The present invention has improved the disadvantages of the conventional exhaust gas treatment method as described above from the above circumstances, that is, a method for treating exhaust gas, that is, a catalyst, an absorbent, an adsorbent, and the like for treating NO X and SO X in the exhaust gas. It is an object of the present invention to provide a novel NO X and SO X removal method that can process NO X and SO X in a single step without any need.
本発明は、NOX及びSOXを含む排ガスの処理方法におい
て、OHラジカルを発生するアルコールを含むガスに電磁
波あるいは電子ビームを照射してOHラジカルを生成さ
せ、このOHラジカルを含むガスを上記の排ガスに混合し
て、そのOHラジカルによりNOX及びSOXを同時に分解処理
することを特徴とする排ガスの処理方法を提案するもの
である。The present invention provides a method for treating an exhaust gas containing NO X and SO X, in which a gas containing an alcohol that generates an OH radical is irradiated with an electromagnetic wave or an electron beam to generate an OH radical, and the gas containing the OH radical is converted into the above gas. mixed into the exhaust gas, it is to propose a method of processing an exhaust gas, which comprises simultaneously decomposing NO X and SO X by the OH radicals.
メタノール等のOHラジカルを発生するアルコールを含
むガスに電磁波あるいは電子ビームを照射すると、アル
コールや共存する物質からOHラジカルが発生する。この
ラジカルを含むガスをNO及びSO2を含む排ガスと混合す
るとこのラジカルにより次の反応が生じる。When an electromagnetic wave or an electron beam is irradiated on a gas containing an alcohol that generates an OH radical, such as methanol, an OH radical is generated from the alcohol or a coexisting substance. When the gas containing the radical is mixed with the exhaust gas containing NO and SO 2 , the radical causes the following reaction.
上記の（１），（２）式に示すように、NO及びSO2は
還元されてそれぞれN2及び単体のイオウＳに分解され
る。このプロセスで発生するN2,H2O,O2は無害であり、
後処理の必要はないが、Ｓは処理ガス中に固体状で含ま
れるので集塵器で除去される。 As shown in the above formulas (1) and (2), NO and SO 2 are reduced and decomposed into N 2 and simple sulfur S, respectively. N 2 , H 2 O, O 2 generated in this process is harmless,
Although there is no need for post-treatment, S is contained in the processing gas in a solid state and is removed by a dust collector.
本発明の方法で用いられるOHラジカルを発生する前駆
体としては、メタノール、エタノール及びそのアルコー
ル誘導体があげられる。Precursors that generate OH radicals used in the method of the present invention include methanol, ethanol and alcohol derivatives thereof.
また、本発明の方法では、電磁波としては紫外・可視
・赤外光が用いられるが、波長範囲が150nm〜16μｍの
紫外・可視・赤外光としては、アルゴン、CO2、エキシ
マ等のガスレーザーシステム及びイットリウム−アルミ
ニウム−ガーネット（YAG）等の固体レーザーシステム
を用いて出射されるレーザー光が用いられる。In the method of the present invention, ultraviolet, visible, and infrared light is used as the electromagnetic wave, and the ultraviolet, visible, and infrared light having a wavelength range of 150 nm to 16 μm includes gas lasers such as argon, CO 2 , and excimer. Laser light emitted using a solid-state laser system such as a system and yttrium-aluminum-garnet (YAG) is used.
さらに、また、マイクロ波を用いる場合は、OHラジカ
ルを発生するアルコールを誘導した空洞共振器内で照射
する。Further, when microwaves are used, the irradiation is performed in a cavity resonator in which alcohol that generates OH radicals is induced.
なお、OHラジカルを含むガスは排ガスに対して、排ガ
スが露点に至らない温度、すなわち、50〜100℃の温度
範囲でOHラジカルとNOX＋SOXのモル比が3:1になるよう
に混合される。The gas containing OH radicals is mixed with the exhaust gas at a temperature at which the exhaust gas does not reach the dew point, that is, in a temperature range of 50 to 100 ° C., so that the molar ratio of OH radical to NO X + SO X becomes 3: 1. Is done.
次に本発明の方法について行った実験例を第１図の説
明図に基づいて説明する。NO,SO2,CH3OH,N2の試験ガス
がそれぞれ別々に封入されている試験ガス容器１からガ
ス流量調整器２により流量を調整してCH3OHガスとN2ガ
スとを抜き出して混合しCH3OH含有ガス３の濃度を調整
した。ついでこのCH3OH含有ガス３をガス流量30cc/sで
反応セル４に導入し、ArF−エキシマレーザーシステム
５からの波長193nmのレーザー光６を100Hzのパルス発振
の条件（１〜100Hzで発振させてもよい）で連続照射し
た。レーザー光の照射によりCH3OHは励起されOHラジカ
ルが生成する。Next, an experimental example performed on the method of the present invention will be described based on the explanatory diagram of FIG. The flow rates of the CH 3 OH gas and the N 2 gas are extracted from the test gas container 1 in which the test gases NO, SO 2 , CH 3 OH, and N 2 are separately sealed by adjusting the flow rate by the gas flow rate regulator 2. The concentration of the CH 3 OH-containing gas 3 was adjusted by mixing. Next, the CH 3 OH-containing gas 3 is introduced into the reaction cell 4 at a gas flow rate of 30 cc / s, and the laser beam 6 having a wavelength of 193 nm from the ArF-excimer laser system 5 is oscillated at a pulse oscillation condition of 100 Hz (1 to 100 Hz). May be continuously irradiated. CH 3 OH is excited by laser light irradiation to generate OH radicals.
一方、CH3OH含有ガスを調整する場合と同様な方法
で、NO,SO2及びN2ガスを試験ガス容器１から抜き出し混
合して、NO濃度100ppm、SO2濃度600ppmの供試ガス７を
調整した。このようにして調整した供試ガス７をガス流
量30cc/sでガス混合器８に導き反応セル４からのOHラジ
カルを含むガスと80℃で混合した。On the other hand, in the same manner as in the case of adjusting the CH 3 OH-containing gas, NO, SO 2 and N 2 gases are extracted from the test gas container 1 and mixed to obtain a test gas 7 having an NO concentration of 100 ppm and an SO 2 concentration of 600 ppm. It was adjusted. The test gas 7 thus adjusted was introduced into the gas mixer 8 at a gas flow rate of 30 cc / s and mixed with the gas containing OH radicals from the reaction cell 4 at 80 ° C.
混合すると同時に供試ガス７中に含まれているNOとSO
2はOHラジカルと反応し分解し、N2とＳに変換した。NO and SO contained in test gas 7 at the same time as mixing
2 was decomposed by reacting with OH radicals and converted into N 2 and S.
反応後のガスをガス組成分析計９に導きガス組成を分
析し、NO及びSO2の分解率を求めた。その結果、NO及びS
O2の分解率は共に65％であった。この実験例から本発明
の方法は排ガス処理に有効であることが認められた。な
お本実施例の方法によればつぎの効果を奏する。The gas after the reaction was introduced into the gas composition analyzer 9 and the gas composition was analyzed to determine the decomposition rates of NO and SO 2 . As a result, NO and S
Both O 2 decomposition rates were 65%. From this experimental example, it was confirmed that the method of the present invention was effective for exhaust gas treatment. According to the method of the present embodiment, the following effects are obtained.
（１）NOXとSOXを別々のプロセスでかつ複数段階で処理
する必要がなく、単一プロセスで一段でNOXとSOXとを同
時に処理することができ、プロセスが単純となり、した
がって必要とする機器点数も少なくなる。(1) It is not necessary to process NO X and SO X in separate processes and in multiple stages, NO X and SO X can be processed simultaneously in a single process in a single step, and the process becomes simple, thus requiring The number of devices to be used also decreases.
（２）従来のプロセスで必要とした触媒や吸収液、吸着
剤等を必要としない。(2) It does not require a catalyst, an absorbing solution, an adsorbent, and the like required in the conventional process.
（３）排ガス中のNOX及びSOXを処理するために、処理す
べき排ガス全体に電磁波あるいは電子ビームを照射する
のではなく、添加するガスにのみ電磁波あるいは電子ビ
ームを照射させるので、排ガスによる光学系の汚染が防
止され、排ガス中の不純物によるエネルギロスを低減す
ることが可能である。(3) In order to treat NO X and SO X in exhaust gas, instead of irradiating the entire exhaust gas to be treated with electromagnetic waves or electron beams, only the added gas is irradiated with electromagnetic waves or electron beams. It is possible to prevent contamination of the optical system and reduce energy loss due to impurities in exhaust gas.
本発明の排ガスの処理方法によれば次のような効果を
奏する。According to the exhaust gas treatment method of the present invention, the following effects can be obtained.
（１）NOXとSOXを別々のプロセスでかつ複数段階で処理
する必要がなく、単一プロセスで一段でNOXとSOXとを同
時に処理することができ、プロセスが単純となり、した
がって、必要とする機器点数も少なくなる。(1) There is no need to process NO X and SO X in separate processes and in multiple stages, NO X and SO X can be processed simultaneously in a single process in a single step, and the process is simplified, thus The number of required equipment is also reduced.
（２）従来のプロセスで必要とした触媒や吸収液、吸着
剤等を必要としない。(2) It does not require a catalyst, an absorbing solution, an adsorbent, and the like required in the conventional process.
第１図は本発明の実験例を説明するための説明図であ
る。 １……試料ガス容器 ２……ガス流量調整器 ３……CH3OH含有ガス ４……反応セル ５……ArF−エキシマレーザーシステム ６……レーザー光 ７……供試ガス ８……ガス混合器 ９……ガス組成分析計FIG. 1 is an explanatory diagram for explaining an experimental example of the present invention. 1 ...... sample gas container 2 ...... gas flow controller 3 ...... CH 3 OH containing gas 4 ...... reaction cell 5 ...... ArF-excimer laser system 6 ...... laser beam 7 ...... test gas 8 ...... gas mixture Instrument 9 Gas analyzer
Claims (1)
て、OHラジカルを発生するアルコールを含むガスに電磁
波あるいは電子ビームを照射してOHラジカルを生成さ
せ、このOHラジカルを含むガスを上記排ガスに混合し
て、そのOHラジカルによりNOX及びSOXを同時に分解処理
することを特徴とする排ガスの処理方法。In a method for treating an exhaust gas containing NO X and SO X , a gas containing an alcohol that generates OH radicals is irradiated with an electromagnetic wave or an electron beam to generate OH radicals. A method for treating exhaust gas, wherein the exhaust gas is mixed with the exhaust gas and the NO X and SO X are simultaneously decomposed by OH radicals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62253807A JP2607548B2 (en) | 1987-10-09 | 1987-10-09 | Exhaust gas treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62253807A JP2607548B2 (en) | 1987-10-09 | 1987-10-09 | Exhaust gas treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0199633A JPH0199633A (en) | 1989-04-18 |
| JP2607548B2 true JP2607548B2 (en) | 1997-05-07 |
Family
ID=17256422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62253807A Expired - Lifetime JP2607548B2 (en) | 1987-10-09 | 1987-10-09 | Exhaust gas treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2607548B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5342599A (en) * | 1990-09-14 | 1994-08-30 | Cummins Power Generation, Inc. | Surface stabilized sources of isocyanic acid |
| US5234671A (en) * | 1990-09-20 | 1993-08-10 | Molecular Technology Corporation | Reduction of nitrogen oxide in effluent gases using formaldehyde and/or formaldehyde-derived free radicals |
| US5284556A (en) * | 1991-05-01 | 1994-02-08 | Plasmachines, Inc. | Exhaust treatment system and method |
| US6264314B1 (en) | 1991-05-27 | 2001-07-24 | Seiko Epson Corporation | Ink cartridge for ink jet recording apparatus |
| SG95595A1 (en) | 1998-05-13 | 2003-04-23 | Seiko Epson Corp | Ink cartridge for ink-jet printing apparatus |
| FR2791276B1 (en) * | 1999-03-26 | 2002-01-18 | Anne Marie Coudert | PROCESS FOR DECOMPOSING ATMOSPHERIC POLLUTANTS. APPARATUS FOR THIS REALIZATION |
| CN110038403B (en) * | 2019-04-30 | 2024-10-11 | 李焕昌 | Non-turbulent wave infrared electromagnetic wave denitration device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59222213A (en) * | 1983-05-30 | 1984-12-13 | Japan Atom Energy Res Inst | Treatment of waste gas |
| JPH0815532B2 (en) * | 1987-05-21 | 1996-02-21 | 三菱重工業株式会社 | Exhaust gas treatment method |
-
1987
- 1987-10-09 JP JP62253807A patent/JP2607548B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0199633A (en) | 1989-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4110427B2 (en) | Absorber regeneration | |
| US7998445B2 (en) | Method and apparatus for the treatment of nitrogen oxides using an ozone and catalyst hybrid system | |
| JP3329386B2 (en) | Method and apparatus for removing SO2 and NOx from combustion flue gas | |
| JP2607548B2 (en) | Exhaust gas treatment method | |
| US4146450A (en) | Method for removing nitrogen oxides from nitrogen oxide-containing gases | |
| CA2281392C (en) | Method for decomposing bromic acid by photocatalyst and apparatus therefor | |
| JPS62262433A (en) | Surface treating method | |
| JPH0815532B2 (en) | Exhaust gas treatment method | |
| JP5927074B2 (en) | Gas processing method and gas processing apparatus | |
| JP3711490B2 (en) | Method and apparatus for oxidizing SO2 in exhaust gas using HO2 radical as OH generating reactive species in radical chain reaction of SO2 oxidation | |
| JPH08155264A (en) | Desulfurization and denitration of flue gas and apparatus therefor | |
| JPS59222213A (en) | Treatment of waste gas | |
| KR970020150A (en) | Removal method of harmful components in incinerator flue gas and device | |
| JPH0714462B2 (en) | Decomposition method of nitrous oxide in gas mixture | |
| JP2578131B2 (en) | SOx removal method | |
| JP2607639B2 (en) | DeNOx method | |
| JPS63267423A (en) | Decomposition method for nitrogen oxide in gas mixture containing nitrogen oxide | |
| JPH0651097B2 (en) | Method for decomposing and removing nitrous oxide in gas mixture | |
| RU2257256C1 (en) | Method of cleaning gas emissions from polycyclic aromatic hydrocarbons, benza-pyrene inclusive | |
| JP3398414B2 (en) | Detoxification equipment for harmful chlorine compounds | |
| KR101765467B1 (en) | Heat Resonance System for Brazier that using Degassed Nitrogen Oxide Bio-fuel | |
| JP2864640B2 (en) | NO ▲ lower x gas processing equipment | |
| KR19990018051A (en) | Flue gas treatment method by electron beam irradiation | |
| JPH0442054B2 (en) | ||
| JPS60251917A (en) | Desulfurization and denitration of waste gas |