Theoretical Study on Efficiency of Anti-explosion and Fireproof Agents

Multi-protection is a principle in security management, and the use of anti-explosion and fireproof agents is a crucial part of it. In this paper, the properties of nano-oxide particles in the field of anti-explosion and fireproof were analyzed. The sedimentation velocity of nanometer particles was calculated. CH4 was taken as an example, and its combustion mechanism of the initial stages was concluded. The effects of 15 oxides on molecular energies of the reaction system were calculated with program Hyperchem 6, and the possible contact manner between radi- cals and oxides was got. It was concluded that oxides, such as ZrO2, could combine with radicals, and thus prevent the combustion reaction. It was found that the nano-ZrO2 eruptively generated aerosol is superior to other counterparts in serving as the anti-explosion and fireproof agent, and therefore, will play an increasingly important role in the security management.

矿井避难硐室防护系统研究

根据避难硐室的防护功能,确定防护系统由防火防爆、密闭、供氧、制冷除湿、监测监控、动力、通讯、定位、照明、医疗、食品、水、卫生几大系统组成;通过理论分析,确定防火防爆密闭系统抗爆压力影响因素为反射压力、入射压力、静压载荷、门体材料及安全系数;通过计算,可得100人避难硐室压风供氧系统总供风量不得低于36m3/min,其他供氧方式的最小供氧量不得低于60L/min。为避难硐室防护系统研究提供了科学依据及可靠数据,为矿井紧急避险系统的研究奠定了基础。

矿井避难硐室防火防爆密闭系统研究与试验

通过爆炸冲击压力计算,确定了矿井避难硐室防火防爆密闭门、墙的厚度分别为8 mm和1.6 m。研究确定了防爆门墙采用抗爆隔温的复合结构及阻燃材料:硐室外管路采用预埋的铺设方式;硐室四周充填密闭缓冲材料。通过抗爆及现场气密试验,测定了防爆门的最大抗爆压力为0.61 MPa,回风系统抗爆压力为0.37 MPa,硐室最大充气压力为2 700 Pa,研究确定了避难硐室防火防爆密闭系统的组成,提高了系统的防火防爆性能。

长途通信HDPE管道的维护

着重从管道的密闭、清洁、维护、防火等方面 。

某单边上翻铰链式舱口盖设计

根据总体技术要求,从结构、密封和防火方面综合考虑,设计了一种单边上翻铰链式舱口盖。通过运动学和有限元仿真手段对舱口盖的动作正确性和结构强度进行了校核。最后,经现场动作试验、密性试验、防火试验验证,该舱口盖满足无压差气密和A15等级防火要求。