电力与能源
電力與能源
전력여능원
Power and Energy
2014年
3期
366-368,393
,共4页
高秀晶%吴俐俊%梁辰光
高秀晶%吳俐俊%樑辰光
고수정%오리준%량신광
低压省煤器%板壳式%管翅式%等效热降法%热经济性
低壓省煤器%闆殼式%管翅式%等效熱降法%熱經濟性
저압성매기%판각식%관시식%등효열강법%열경제성
Low-pressure economizer%Plate and shell%Finned tube%Equivalent enthalpy drop method%Ther-mal economy
加装低压省煤器是火电厂节能减排的重要措施之一。以北方某电厂55 MW供热机组为对象，利用等效热降法和热平衡理论，分别对新型板壳式低压省煤器和传统管翅式低压省煤器的传热性能进行比对分析和节能评估。计算结果表明，在传输压降和换热量基本相同的条件下，与管翅式低压省煤器相比，新型板壳式低压省煤器的换热系数提高了32．9 W/（m2·℃），换热面积降低了865．4 m2，省煤器重量降低了7．7 t。因此，新型板壳式省煤器具有更好的节能效果。
加裝低壓省煤器是火電廠節能減排的重要措施之一。以北方某電廠55 MW供熱機組為對象，利用等效熱降法和熱平衡理論，分彆對新型闆殼式低壓省煤器和傳統管翅式低壓省煤器的傳熱性能進行比對分析和節能評估。計算結果錶明，在傳輸壓降和換熱量基本相同的條件下，與管翅式低壓省煤器相比，新型闆殼式低壓省煤器的換熱繫數提高瞭32．9 W/（m2·℃），換熱麵積降低瞭865．4 m2，省煤器重量降低瞭7．7 t。因此，新型闆殼式省煤器具有更好的節能效果。
가장저압성매기시화전엄절능감배적중요조시지일。이북방모전엄55 MW공열궤조위대상，이용등효열강법화열평형이론，분별대신형판각식저압성매기화전통관시식저압성매기적전열성능진행비대분석화절능평고。계산결과표명，재전수압강화환열량기본상동적조건하，여관시식저압성매기상비，신형판각식저압성매기적환열계수제고료32．9 W/（m2·℃），환열면적강저료865．4 m2，성매기중량강저료7．7 t。인차，신형판각식성매기구유경호적절능효과。
Assembling low pressure economizer is one of the important measures for energy-saving and emission reduction in power plants.Based on equivalent enthalpy drop method and thermal-equilibrium theory,an anal-ysis is made of the 5 5 MW Unit to calculate the energy saving quantity of plate and shell economizer and con-ventional economizer.The results show that plate and shell economizer has better energy saving effect.With the same pressure drop and heat transfer rate,compared with finned tube economizer heat transfer coefficient of plate and shell economizer has increased by 32.9 W/(m2·℃),the heat transfer area has reduced by 865.4 m2 and the weight has reduced by 7 .7 t.
