Hot air circulating system is arranged outward to kiln hood

The utility model provides a hot air circulating system is arranged outward to kiln hood, it includes the kiln hood exhaust fan and the cold quick -witted fan of combing, adds circulating wind pipe way between cold quick -witted fan import in kiln hood exhaust fan exit with combing, establishes the hot -blast valve on circulating wind pipe says, the intake stack and the cold -blast valve of valve as hot air circulating system of the cold quick -witted fan of combing cool the air intake position of quick -witted fan at the comb and establish temperature measuring device. The utility model discloses the outer heat extraction amount of wind of kiln hood has reduced about 80%, and the corresponding dust emission amount that has reduced has further improved peripheral ecological environment, has gained good social. 本实用新型提出了种窑头外排热风循环系统，其包括窑头排风机和篦冷机风机，在窑头排风机出口处与篦冷机风机进口间增设循环风管道，在循环风管道上设热风阀，篦冷机风机的进风管道和阀门作为热风循环系统的冷风阀，在篦冷机风机的进风口位置设测温装置。本实用新型窑头外排热风量降低了80%左右，相应减少了粉尘排放量，进步改善了周边生态环境，取得了良好的社会效益。