高压细水雾灭火对古建筑木构件的水渍损失研究

高压细水雾灭火系统喷雾后会对木构件造成一定的水渍损失,为了探明木构件的水渍损失情况,对10 种木材喷雾后含水率、阴干速率和腐朽状态进行研究。通过搭建实验平台进行模拟实验,测定了不同大气湿度、环境温度下高压细水雾喷雾后实验木块含水率变化情况,分析了实验木块的含水率变化趋势、阴干速率和腐朽状态。实验结果表明,高压细水雾灭火系统喷雾后实验木块含水率测定值在35%以内,阴干2 h 后木材含水率下降至20%,阴干5 h 后木材含水率下降至河南地区平衡含水率以内,封存45 d 后实验木块肉眼观察无腐朽症状。通过对济渎庙玉皇殿消防改造工程的介绍,阐明高压细水雾灭火系统在古建筑消防改造中的技术优势,为古建筑消防系统的设计提供参考。

Research on water damage of ancient wooden structure after spraying with high pressure water mist fire extinguishing system

High pressure water mist fire extinguishing system will cause water stain damage on the wooden components, in order to understand the water- stain loss, this paper studied the rates of water content, drying rates in shade and rotten state of 10 kinds of wood. Through setting up an experiment platform and conducting simulation experiments, the change of water content in the experimental wood bricks after spraying high pressure water mist was tested under different atmospheric humidity and temperatures, the trend of water content, drying rates in shade and rotten state of the experimental wood bricks after spraying were analyzed. The experimental results showed that the measured values of the water content in the experimental wood bricks after spraying high pressure water mist were within 35%, after drying 2 h,the values dropped to 20%, and the values decreased below the equilibrium water content of Henan province after drying 5 h in shade, the experimental wood bricks didn’t decay after 45-days. Through the introduction of the fire protection design project of Jidu Temple, highpressure water- mist fire extinguishing systems technical advantages in the fire- fighting renovation of ancient buildings are illustrated, which provides reference for the design of fire extinguishing system in ancient buildings.