RU2000132737A - SMOKE GAS PROCESSING METHOD - Google Patents

SMOKE GAS PROCESSING METHOD

Info

Publication number
RU2000132737A
RU2000132737A RU2000132737/12A RU2000132737A RU2000132737A RU 2000132737 A RU2000132737 A RU 2000132737A RU 2000132737/12 A RU2000132737/12 A RU 2000132737/12A RU 2000132737 A RU2000132737 A RU 2000132737A RU 2000132737 A RU2000132737 A RU 2000132737A
Authority
RU
Russia
Prior art keywords
urea
specified
solution
ammonia
carbon dioxide
Prior art date
Application number
RU2000132737/12A
Other languages
Russian (ru)
Other versions
RU2193442C2 (en
Inventor
Винченцо ЛАГАНА'
Original Assignee
Сииртек-Ниджи С.П.А.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from IT98MI001155A external-priority patent/ITMI981155A1/en
Application filed by Сииртек-Ниджи С.П.А. filed Critical Сииртек-Ниджи С.П.А.
Application granted granted Critical
Publication of RU2193442C2 publication Critical patent/RU2193442C2/en
Publication of RU2000132737A publication Critical patent/RU2000132737A/en

Links

Claims (5)

1. Способ кондиционирования дымового газа, в котором аммиак впрыскивают в поток указанного дымового газа, отличающийся тем, что мочевину растворяют в воде, получая раствор мочевины; нагревают и подвергают давлению указанный раствор мочевины, получая нагретый и имеющий избыточное давление раствор мочевины; гидролизуют растворенную мочевину в указанном нагретом и имеющем избыточное давление растворе мочевины, получая гидролизованный раствор, содержащий аммиак и диоксид углерода; отгоняют указанный аммиак и диоксид углерода из указанного гидролизованного раствора путем контактирования указанного гидролизованного раствора с паром, оставляя позади отпаренный гидролизованный раствор; впрыскивают указанные аммиак и диоксид углерода в указанный поток дымового газа, и возвращают в цикл указанный отпаренный гидролизованный раствор для растворения указанной мочевины после доведения давления и температуры до величин, совместимых с подготовкой растворения мочевины.1. The method of conditioning the flue gas, in which ammonia is injected into the stream of the specified flue gas, characterized in that the urea is dissolved in water, obtaining a urea solution; said urea solution is heated and subjected to pressure to obtain a heated and overpressure urea solution; hydrolyzing the dissolved urea in said heated and overpressure urea solution to obtain a hydrolyzed solution containing ammonia and carbon dioxide; distilling off said ammonia and carbon dioxide from said hydrolyzed solution by contacting said hydrolyzed solution with steam, leaving behind the stripped hydrolyzed solution; the specified ammonia and carbon dioxide are injected into the specified flue gas stream, and the specified steamed hydrolyzed solution is returned to the cycle to dissolve the specified urea after adjusting the pressure and temperature to values compatible with the preparation of dissolving the urea. 2. Способ по п. 1, отличающийся тем, что указанный раствор мочевины содержит мочевину в количестве около 10 - 70 мас. %. 2. The method according to p. 1, characterized in that the said urea solution contains urea in an amount of about 10 to 70 wt. % 3. Способ по п. 1, отличающийся тем, что указанную растворенную мочевину подвергают гидролизу при температуре около 100 - 233oС.3. The method according to p. 1, characterized in that the said dissolved urea is subjected to hydrolysis at a temperature of about 100 - 233 o C. 4. Способ по п. 1, отличающийся тем, что указанную растворенную мочевину подвергают гидролизу при давлении от около 0,1•103 до около 3,0•103 кПа.4. The method according to p. 1, characterized in that the said dissolved urea is subjected to hydrolysis at a pressure of from about 0.1 • 10 3 to about 3.0 • 10 3 kPa. 5. Способ по п. 1, отличающийся тем, что указанный отпаренный гидролизованный раствор расширяют, получая пары гидролиза, которые объединяют с указанными аммиаком и диоксидом углерода и впрыскивают в указанный поток указанного дымового газа горения. 5. The method according to p. 1, characterized in that the steamed hydrolyzed solution is expanded, getting a pair of hydrolysis, which are combined with the specified ammonia and carbon dioxide and injected into the specified stream of the specified combustion flue gas.
RU2000132737/12A 1998-05-25 1999-05-14 Flue gas treatment method RU2193442C2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI98A001155 1998-05-25
IT98MI001155A ITMI981155A1 (en) 1998-05-25 1998-05-25 PROCESS FOR THE PRODUCTION OF AMMONIA BY HYDROLYSIS OF THE UREA

Publications (2)

Publication Number Publication Date
RU2193442C2 RU2193442C2 (en) 2002-11-27
RU2000132737A true RU2000132737A (en) 2003-01-27

Family

ID=11380095

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2000132737/12A RU2193442C2 (en) 1998-05-25 1999-05-14 Flue gas treatment method

Country Status (17)

Country Link
US (1) US5985224A (en)
EP (1) EP1089804B1 (en)
JP (1) JP2002516169A (en)
KR (1) KR100580930B1 (en)
CN (1) CN1168527C (en)
AT (1) ATE235300T1 (en)
AU (1) AU755072B2 (en)
CA (1) CA2331268C (en)
CZ (1) CZ294281B6 (en)
DE (1) DE69906291D1 (en)
ES (1) ES2196805T3 (en)
HK (1) HK1037986A1 (en)
IT (1) ITMI981155A1 (en)
PL (1) PL194720B1 (en)
RU (1) RU2193442C2 (en)
TR (1) TR200003469T2 (en)
WO (1) WO1999061136A1 (en)

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US20030211024A1 (en) * 2002-05-10 2003-11-13 Wojichowski David Lee Methods of converting urea to ammonia for SCR, SNCR and flue gas conditioning
US6887449B2 (en) * 2002-11-21 2005-05-03 The Chemithon Corporation Method of quantitatively producing ammonia from urea
EP1533018A1 (en) 2003-11-05 2005-05-25 Urea Casale S.A. Method for the treatment of combustion flue gas
EP2069049A2 (en) * 2006-08-22 2009-06-17 Babcock Power Inc. Thermal decomposition of urea in a side stream of combustion flue gas using a regenerative heat exchanger
US20080267837A1 (en) * 2007-04-27 2008-10-30 Phelps Calvin E Conversion of urea to reactants for NOx reduction
CN100588613C (en) * 2007-08-24 2010-02-10 中电投远达环保工程有限公司 Technique for preparing ammonia from urea by pyrolysis method
CN101778798A (en) * 2007-08-24 2010-07-14 鲍尔斯潘公司 Method and apparatus for producing ammonium carbonate from urea
US20090148370A1 (en) * 2007-12-06 2009-06-11 Spencer Iii Herbert W Process to produce ammonia from urea
SE532906C2 (en) * 2008-09-23 2010-05-04 Scania Cv Abp Hydrolysis catalyst with greater channel cross-section in the peripheral part than in the central part and methods for hydrolysis of a urea
DE102009005677A1 (en) 2009-01-22 2010-08-05 Kruse Gmbh & Co. Kg Process and apparatus for producing high-purity urea solution
US9428449B2 (en) 2013-01-16 2016-08-30 Alstom Technology Ltd Method of forming urea by integration of an ammonia production process in a urea production process and a system therefor
US9586831B2 (en) 2014-06-09 2017-03-07 Wahlco, Inc. Urea to ammonia process
CN104192862B (en) * 2014-09-23 2016-05-11 东方电气集团东方锅炉股份有限公司 A kind of hydrolysis of urea ammonia method and apparatus processed that utilizes boiler gas
CN104474892A (en) * 2014-12-09 2015-04-01 邹英奎 Production method of denitrification powder
CN105116719B (en) * 2015-07-17 2017-08-25 中国华能集团公司 Hydrolysis of urea reactor control system and method based on heat feed-forward signal
CN105921014A (en) * 2016-05-10 2016-09-07 南宁市夏阳化工科技有限责任公司 Preparing method for urea solution used for vehicles
CN113401921B (en) * 2021-05-17 2024-03-22 许昌龙岗发电有限责任公司 Urea hydrolysis ammonia production system and control method thereof

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