洁净煤技术
潔淨煤技術
길정매기술
CLEAN COAL TECHNOLOGY
2015年
2期
77-80
,共4页
选择性催化还原法%运行温度%脱硝反应器%硫酸氢铵
選擇性催化還原法%運行溫度%脫硝反應器%硫痠氫銨
선택성최화환원법%운행온도%탈초반응기%류산경안
selective catalytic reduction%operating temperature%denitration SCR reactor%NH3 HSO4
针对降低SCR脱硝反应区域运行温度后造成催化剂失活的问题，以600 MW燃煤机组典型SCR脱硝反应系统为研究对象，分析了脱硝SCR催化反应温度、催化剂区域硫酸氢铵生成温度、还原剂稀释风、测温元件允许误差等对机组脱硝反应区域温度的影响，确定SCR反应器区域最低运行温度安全值。结果表明，钒钨钛系催化剂的活性温度窗口为320~420℃，最佳反应温度窗口主要集中在340~380℃，SCR脱硝反应效率达到最高约90%；SCR反应器入口的气相主体硫酸氢铵的凝结温度为270~320℃；喷氨稀释风会降低SCR反应器运行温度，温度降低2.6~2.9℃；温度测量元件的允许误差对SCR反应器系统测量温度造成相对固定的影响，造成温度最大偏低约4℃。提出SCR脱硝反应器进口温度应集中在350~390℃。
針對降低SCR脫硝反應區域運行溫度後造成催化劑失活的問題，以600 MW燃煤機組典型SCR脫硝反應繫統為研究對象，分析瞭脫硝SCR催化反應溫度、催化劑區域硫痠氫銨生成溫度、還原劑稀釋風、測溫元件允許誤差等對機組脫硝反應區域溫度的影響，確定SCR反應器區域最低運行溫度安全值。結果錶明，釩鎢鈦繫催化劑的活性溫度窗口為320~420℃，最佳反應溫度窗口主要集中在340~380℃，SCR脫硝反應效率達到最高約90%；SCR反應器入口的氣相主體硫痠氫銨的凝結溫度為270~320℃；噴氨稀釋風會降低SCR反應器運行溫度，溫度降低2.6~2.9℃；溫度測量元件的允許誤差對SCR反應器繫統測量溫度造成相對固定的影響，造成溫度最大偏低約4℃。提齣SCR脫硝反應器進口溫度應集中在350~390℃。
침대강저SCR탈초반응구역운행온도후조성최화제실활적문제，이600 MW연매궤조전형SCR탈초반응계통위연구대상，분석료탈초SCR최화반응온도、최화제구역류산경안생성온도、환원제희석풍、측온원건윤허오차등대궤조탈초반응구역온도적영향，학정SCR반응기구역최저운행온도안전치。결과표명，범오태계최화제적활성온도창구위320~420℃，최가반응온도창구주요집중재340~380℃，SCR탈초반응효솔체도최고약90%；SCR반응기입구적기상주체류산경안적응결온도위270~320℃；분안희석풍회강저SCR반응기운행온도，온도강저2.6~2.9℃；온도측량원건적윤허오차대SCR반응기계통측량온도조성상대고정적영향，조성온도최대편저약4℃。제출SCR탈초반응기진구온도응집중재350~390℃。
The lower operating temperature of SCR denitration reactor directly caused catalyst deactivation. In order to resolve this problem, taking the typical SCR denitration system of 600 MW coal-fired unit as research object,the influence of reaction temperature,NH3 HSO4 formation temperature in catalytic reaction region,sprayed ammonia diluted wind and permissible error of temperature measurement compo-nents on the temperature of denitration area was analyzed. The minimum safe operating temperature of SCR denitration reactor was deter-mined. The results showed that,the activation temperature of vanadium-tungsten-titanium catalyst ranged from 320 ℃ to 420 ℃. When the temperature was between 340 ℃ and 380 ℃,the reaction had the best performance and the denitration efficiency reached about 90%. The condensation temperature of NH3 HSO4 which was the major component in gas phase was between 270 ℃and 320 ℃. The sprayed am-monia diluted wind reduced the denitration temperature by 2. 6 ℃ to 2. 9 ℃. The permissible error of temperature measurement compo-nents had relatively fixed influence on SCR denitration reactor,the maximum reduction was about 4 ℃. At last,the inlet temperature was determined in the range of 350 ℃ and 390 ℃.
