Case 3: fire in Petrochemical Plant in Lanzhou发生时间：2010年1月7日；发生地点：中石油兰州石化303厂起火原因：原料罐区石油罐发生闪爆：火灾伤亡：造成6人死亡，五人失踪
Case 3: fire in Petrochemical Plant in Lanzhou 发生时间：2010年1月7日； 发生地点：中石油兰州石化303厂； 起火原因：原料罐区石油罐发生闪爆； 火灾伤亡：造成6人死亡，五人失踪
6.1.2 Characteristic of building fire建筑起火的原因Causesofbuildingfire口生活和生产用火不慎Careless usageoffireinlifeandproduction口违反生产安全制度Violation of safety production rule口电气设备设计、安装、使用及维护不当Inappropriate design, installment, usage and maintenance ofelectrical equipment口自然现象引起Naturalphenomenon口人为纵火Arson口建筑布局不合理Unreasonable building layout
6.1.2 Characteristic of building fire 建筑起火的原因 Causes of building fire 生活和生产用火不慎 Careless usage of fire in life and production 违反生产安全制度 Violation of safety production rule 电气设备设计、安装、使用及维护不当 Inappropriate design, installment, usage and maintenance of electrical equipment 自然现象引起 Natural phenomenon 人为纵火 Arson 建筑布局不合理 Unreasonable building layout
火灾的发展过程Developmentoffire口火穴灾初期增长阶段、火灾全盛阶段、火灾衰退阶段initial growth stage, full burning stage, fire recession stage .初期增长阶段全盛阶段衰退阶段烟气最高温度的80%B轰然DA0燃烧时间
火灾的发展过程 Development of fire 火灾初期增长阶段、火灾全盛阶段、火灾衰退阶段 initial growth stage, full burning stage， fire recession stage . 初期增长阶段 全盛阶段 衰退阶段 室内火灾烟气 平均温度 O A B C D 轰然 烟气最高温度的80% 燃烧时间
火灾的发展过程Developmentoffire口初期增长阶段特征：火灾燃烧范围不大，火灾仅限于初始起火点附近室内温度差别大，在燃烧区域及其附近存在高温，室内平均温度低火灾发展速度较慢，在发展过程中火势不稳定；火灾发展时间因受点火源、可燃物质性质和分布以及通风条件影响，其长短差别很大。Characteristics of initial growth stage: The fire is limited to the initialfire point. The temperature indoor is very different that thetemperature in the combustion area and its vicinity is higher while theaverage temperature indoor is lower. The development of fire is slowand unstable and its duration is greatly influenced by the ignitionsource, the properties and distribution of combustible materials andthe ventilation conditions.口初期增长阶段是灭火的最有利时机，也是人员安全疏散的最有利时段The initial growth stage is the most favorable time for fire fightingandsafeevacuationofpeoples
火灾的发展过程 Development of fire 初期增长阶段特征：火灾燃烧范围不大，火灾仅限于初始起火点附近； 室内温度差别大，在燃烧区域及其附近存在高温，室内平均温度低； 火灾发展速度较慢，在发展过程中火势不稳定；火灾发展时间因受点 火源、可燃物质性质和分布以及通风条件影响，其长短差别很大。 Characteristics of initial growth stage: The fire is limited to the initial fire point. The temperature indoor is very different that the temperature in the combustion area and its vicinity is higher while the average temperature indoor is lower. The development of fire is slow and unstable and its duration is greatly influenced by the ignition source, the properties and distribution of combustible materials and the ventilation conditions. 初期增长阶段是灭火的最有利时机，也是人员安全疏散的最有利时段 The initial growth stage is the most favorable time for fire fighting and safe evacuation of peoples
full burning stage:在火灾初期增长阶段后期，火灾范围迅速扩大，当火灾房间温度达到一定值时，聚积在房间内的可燃气体突然起火，整个房间都充满了火焰，房间内所有可燃物表面部分都卷入火灾之中，燃烧很猛烈，温度升高很快。In the end of initial growth stage, the fire area expanded rapidlyWhen the room temperature reaches a certain value, thecombustible gas accumulated in the room suddenly caught fireand the room is full of flame. All the fuel surface are involved inthe fire. The combustion is fierce and the temperature risesrapidly
full burning stage: 在火灾初期增长阶段后期，火灾范围迅速扩大，当火灾房间温度 达到一定值时，聚积在房间内的可燃气体突然起火，整个房间都 充满了火焰，房间内所有可燃物表面部分都卷入火灾之中，燃烧 很猛烈，温度升高很快。 In the end of initial growth stage, the fire area expanded rapidly. When the room temperature reaches a certain value, the combustible gas accumulated in the room suddenly caught fire and the room is full of flame. All the fuel surface are involved in the fire. The combustion is fierce and the temperature rises rapidly