TOP > 外国特許検索 > Apparatus for simultaneous dry desulfurization/denitrification

Apparatus for simultaneous dry desulfurization/denitrification

外国特許コード F110005129
整理番号 A071-56US
掲載日 2011年8月23日
出願国 アメリカ合衆国
出願番号 54708503
公報番号 20060147356
公報番号 7455819
出願日 平成15年12月26日(2003.12.26)
公報発行日 平成18年7月6日(2006.7.6)
公報発行日 平成20年11月25日(2008.11.25)
国際出願番号 JP2003017025
国際公開番号 WO2004076032
国際出願日 平成15年12月26日(2003.12.26)
国際公開日 平成16年9月10日(2004.9.10)
優先権データ
  • 特願2003-054900 (2003.2.28) JP
  • 2003WO-JP17025 (2003.12.26) WO
発明の名称 (英語) Apparatus for simultaneous dry desulfurization/denitrification
発明の概要(英語) (US7455819)
It is an high efficiency and low cost apparatus for simultaneous dry desulfurization and denitration ( 10 ), capable of simultaneous oxidation of nitrogen monoxide and sulfur dioxide by chain reaction with OH radical, provided with an OH radical supplying unit ( 12 ), a reactor ( 14 ), a sulfuric acid recovering unit ( 16 ), and a nitric acid recovering unit ( 18 ).
Exhaust gas at 600-800° C. containing sulfur compounds from a boiler ( 2 ) is introduced into the reactor ( 14 ), nitric acid is spray-supplied from an OH radical supplying unit ( 12 ) into the reactor ( 14 ), sulfur dioxide and nitrogen monoxide are simultaneously oxidized with OH radicals generated from pyrolysis of nitric acid as an initiator to form sulfur trioxide and nitrogen dioxide, thereby exhaust gas is treated.
特許請求の範囲(英語) [claim1]
1. A method for simultaneous dry desulfurization and denitration using an apparatus which comprises: a reactor into which an exhaust gas of high temperature is introduced;
and a supplier to introduce nitric acid into said reactor, characterized in that, OH radicals are generated by said nitric acid being introduced into said exhaust gas of high temperature and pyrolyzed, and chain reactions are constituted by said OH radicals, and both of the sulfur dioxide (SO2) and the nitrogen monoxide (NO) in exhaust gas are simultaneously oxidized for exhaust gas treatment.
[claim2]
2. The method for simultaneous dry desulfurization and denitration as set forth in claim 1, characterized in that gas which does not directly contribute to reactions is added into said exhaust gas.
[claim3]
3. The method for simultaneous dry desulfurization and denitration as set forth in claim 2, characterized in that the chain reaction in which said OH radicals are added into the exhaust gas is constituted as,
OH+SO2+M=HOSO2+M (R1),
OHSO2O2=HO2+SO3 (R2), and
HO2+NO=OH+NO2 (R3).
[claim4]
4. The method for simultaneous dry desulfurization and denitration as set forth in claim 1, characterized in that said reaction is conducted under the atmospheric pressure.
[claim5]
5. The method for simultaneous dry desulfurization and denitration as set forth in claim 1, characterized in that said reaction is conducted at a temperature of 650K to 800K.
[claim6]
6. The method for simultaneous dry desulfurization and denitration as set forth in claim 1, characterized in that said reaction is conducted at a temperature of about 600 to 800 deg. C.
  • 発明者/出願人(英語)
  • SADAKATA MASAYOSHI
  • KOSHI MITSUO
  • NISHIOKA MASATERU
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 423/235
  • 423/242.1
  • 423/393
  • 423/400
  • 423/522
  • 423/532
参考情報 (研究プロジェクト等) CREST Social Systems for Better Environment Performance AREA
ライセンスをご希望の方、特許の内容に興味を持たれた方は、問合せボタンを押してください。

PAGE TOP

close
close
close
close
close
close