自动喷水系统中防冻技术回顾与发展

如果消防管道周围温度低于0℃(如冷藏仓库、严寒隧道等),管内会出现水冻结的情况。当发生火灾时,自动喷水系统会因为无法供水而导致火灾无法及时扑灭,从而造成巨大的火灾损失。防冻措施分为防冻液技术、伴热技术和干式系统。在分析总结上述3种防冻措施前提下,提出了技术和经济评价因子,并给出了评价方法。

One-Stage Technology for Production of Concentrated Ethylene Glycol-Water Solutions （Automotive Antifreeze）

The reactor unit for one-stage technology for production of concentrated ethylene glycol-water solutions is described.Such solutions could be useful for production of automotive antifreezes. The technology is based on the highly selective hydration ofethylene oxide in the presence of heterogeneous catalyst-anion-exchange resin in HCO3-/CO/3/2-_form. The mathematical model of reactor allowed evaluating of economical benefit in comparison with conventional method.