关于地下室通风排烟.doc

关于地下室通风排烟
of rural drinking water sources, protection of drinking water sources in rural areas by the end of th6
排烟量L＝12800*6＝76800 m3 补风量L＝38400 m3
相关计算同通风系统计算，选择两台排烟量41472 m3/h，风压273 Pa排烟风机。
主要技术措施
选用两台消防通风（两用）离心风机，平时排风，火灾排烟。
排烟管道上的排烟防火阀当管内烟气的温度达到2800C时，排烟防火阀自动关闭，并发出关闭电信号，同时与风机联锁。
按防烟分区划分通风排烟系统。当某一防烟分区发生火灾时，该分区正常运转，而其它防烟分区的排烟防火阀自动关闭。防排烟系统由消防控制中心集中控制。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
通风风机的选择
1，离心风机
占地面积大、风压范围大，用于低压或高压送风系统，特别是低噪音和高风压的系统。
2，轴流风机
占地面积小、便于维修、风压较低、风量较大，多用于阻力较小的大风量系统。
3，混流风机
集中了离心风机的高压和轴流的大风量的特点。
4，屋顶风机
直接安装在屋顶，适用于上部排风场所。
5，高温消防排烟风机
用于高温排烟系统，能保证在280℃高温下运行30min。
通风系统设计问题
1，当有害气体和蒸汽的密度比空气小，或在相反情况下但会形成稳定上升气流时，宜从房间上部地带排出所需风量的2/3，从下部地带排出1/3。
     当有害气体和蒸汽的密度比空气大，且不会形成稳定上升气流时，宜从房间上部地带排出所需风量的1/3，从下部地带排出2/3。
实际中这样的情况用的好像比较少？
2，进、排风口同侧时，排风口宜高于进风口6m，进、排风口在同侧同一高度时，水平距离不宜小于10m；
3，当排出有爆炸危险的气体或蒸汽时，。
4，在整个控制空间内，尽量使室内气流均匀，减少涡流的存在，从而避免污染物在局部地区积聚。
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities
of rural drinking water sources, protection of drinking water sources in rural areas by the end of the delimitation of the scope of protection, complete with warning signs, isolating network protection facilities