玻璃熔窑大碹的受力及运行

Stress and run of Furnace Crown Structure

研究了玻璃熔窑大碹的受力状况。从单块碹砖受力规律推演到连续多块碹砖受力的受力支撑线。受力支撑线模式随着拉条的松紧可以从最小模式演变到最大模式。熔窑大碹是冷态气密性砌筑的。从冷态大碹到热态大碹过渡时,硅质碹砖在大碹内侧膨胀量很大,引起熔窑大碹的弧度特征改变。如果采用自适应碹脚梁支撑,可以把冷态大碹弧度支撑过渡到热态的大碹支撑模式。如果不能适应大碹热态弧度的碹脚支撑,则大碹碹砖会产生缝隙。缝隙分布与最大支撑线和最小支撑线模式有关;对于最大支撑线模式,缝隙主要分布在碹顶附近。

The stress status of furnace crown was researched here. Crown foree-support-line（CFSL） in bricks can be deduced from force analysis of single brick. With the increase or decrease of tension in tensile bar, the CFSL will change from maximum mode to minimum mode. Crown masonry is built in air tightness at cold status. When the silica crown are heated from cold to hot, great expansion will occurred in bricks, and crown arc feature will be changed. If an adaptive crown foot support being used, arch support mode can be transited from cold to hot. If crown foot support can not meet the hot arc mode, many gaps will occurred between crown bricks. The gap distribution is related with CFSL mode. For the maximum CFSL mode, the gaps are mainly located near the arch top.