Built up numerical simulation model of ufad system with single heat and pollutant source , adopted fluent software to study distribution of temperature 、 velocity and contamination ’ concentration , and changes of heat lamination height when temperature and velocity of air - in and surface temperature of heat source were changed and when the leakage of air - in plenum was considered or not . and compared and verified the simulation results with experimental testing data 建立了单一热污染源地板送风的数值模拟模型,采用fluent软件研究送风温度、送风速度、热源表面温度的变化及有无考虑送风静压层的漏风时,室内温度、速度和污染物浓度分布以及热力分层高度的变化,并与实测分析进行了对比验证。
Basing on the studies on the problems of leak - in , intermittent supplying water , ashing and abrasion in the operation of the auxiliary heating surface - economizer of chain boiler , the problems have been solved , through reinforcing the economizer ' s seal , supplying water frequently and using fin tube economizer . the economizer will reach the design effect in practical operation and the fuel will be saved 本文在分析链条锅炉辅助受热面省煤器运行中存在的漏风、间断上水、积灰及磨损等问题的基础上，通过加强省煤器的密封、勤上水、采用鳍片管省煤器等措施解决省煤器在运行中的问题，使省煤器在实际运行中达到设计效果，节约燃料。
Since the air leakage rate of the air preheaters in waigaoqiao 900 mw units is too high , and the opening of the primary fan stationary blades can not meet the requirement of the unit loads , a retrofit was carried out for the air preheater sealing system in according to the scheme proposed by alstom germany 摘要针对外高桥900mw机组空气预热器漏风率偏高、一次风机静叶开度不能满足机组负荷要求这一影响机组运行的安全性和经济性的问题，依据alstom德国公司提出的改进方案，对该空预器密封系统进行了改造。
The principle and design scheme are described , the corresponding experimental research is conducted and application foreground of the rotary - switching regenerator is analyzed the result indicates that rotary switching regenerator has the advantages of continual gas supply , low leakage rate , low pressure drop and compact equipment 研究结果表明档位蓄热器具有以下特点：可实现对炉窑的连续供气，保证了炉内火焰的稳定性，从而使炉内工况不易波动；另外系统的漏风率较低，阻力损失也较低，并且设备紧凑、操作安全可靠，易于实现标准化生产。
