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脱硫塔着火事故，根源均是防腐材料
近几年随着环保意识的加强及环保法规的完善，各企业纷纷增加脱硫工艺，脱硫塔的建设项目逐年增多，在对脱硫塔的防腐过程中由于施工不当引起的火灾事故时有报道，网上搜索“脱硫塔着火”关键词时一条条新闻一张张图片让人触目惊心，如果有心人仔细研读这些事故追查原因，大家不难发现绝大多数事故均是：防腐材料着火。
In recent years, with the strengthening of environmental awareness and the improvement of environmental protection laws and regulations, enterprises have increased desulfurization process, desulfurization tower construction projects increased year by year, in the process of desulfurization tower corrosion prevention due to improper construction of fire accidents caused by reports, online search "desulfurization tower fire" keywords when a piece of news a picture The film is shocking. If anyone carefully studies the causes of these accidents, it is not difficult to find that the vast majority of the accidents are: anti-corrosion materials on fire.
目前人们常用的玻璃鳞片胶泥，主要由60%左右901乙烯基树脂、酮类固化剂、20%左右玻璃鳞片、15%滑石粉等填料、2%苯乙烯稀释剂组成，在施工时为了使涂料具有流动性需加入10%左右苯乙烯作为稀释剂，苯乙烯因分子量较大，挥发性较差，在玻璃鳞片的鱼鳞结构良好的防渗遮蔽作用下，苯乙烯更难挥发，因此在玻璃鳞片胶泥施工完毕后较长时间内涂层中依然存在大量苯乙烯，安全隐患增加；苯乙烯蒸汽密度大于空气，当苯乙烯挥发后会沉降到施工区域底部，随着时间的延长，底部苯乙烯的浓度越来越高甚至会达到其爆炸极限。
At present, glass flake cement is mainly composed of about 60% 901 vinyl resin, ketone curing agent, 20% glass flake, 15% talcum powder and 2% styrene diluent. In order to make the coating fluidity, about 10% styrene is added as diluent. Styrene is volatilized because of its high molecular weight. Styrene is more difficult to volatilize under the good impervious shielding effect of the fish scale structure of glass flake, so there is still a large amount of styrene in the coating for a long time after the construction of glass flake cement, and the potential safety hazards increase; the steam density of styrene is higher than that of air, when styrene volatilizes, it will settle to the construction area. At the bottom, as time goes on, the concentration of styrene at the bottom gets higher and higher, even reaching its explosive limit.
玻璃鳞片胶泥的耐温极限大约在180℃左右，当遇到电焊等高温时，涂层遭到破坏，封闭在涂层内的苯乙烯、有机树脂等充分与空气接触具备了燃烧的条件从而产生燃烧，如玻璃鳞片胶泥的耐温幅度大幅升高至短暂高温不破坏，则会因涂层隔绝氧气而不具备燃烧条件而杜绝或延缓燃烧，但遗憾的是制作玻璃鳞片胶泥的树脂因结构原因无法实现较大幅度的耐温提升，且该成膜物自身就是可燃有机物。
The temperature resistance limit of glass flake cement is about 180 C. When encountering high temperature such as electric welding, the coating is destroyed, and the styrene and organic resin enclosed in the coating are fully in contact with the air to have combustion conditions, such as the temperature resistance of glass flake cement is greatly increased to short high temperature without destroying. However, it is regrettable that the resin used for making glass flake cement can not achieve a considerable increase in temperature resistance due to structural reasons, and the film itself is a combustible organic matter.
In recent years, with the strengthening of environmental awareness and the improvement of environmental protection laws and regulations, enterprises have increased desulfurization process, desulfurization tower construction projects increased year by year, in the process of desulfurization tower corrosion prevention due to improper construction of fire accidents caused by reports, online search "desulfurization tower fire" keywords when a piece of news a picture The film is shocking. If anyone carefully studies the causes of these accidents, it is not difficult to find that the vast majority of the accidents are: anti-corrosion materials on fire.
目前人们常用的玻璃鳞片胶泥，主要由60%左右901乙烯基树脂、酮类固化剂、20%左右玻璃鳞片、15%滑石粉等填料、2%苯乙烯稀释剂组成，在施工时为了使涂料具有流动性需加入10%左右苯乙烯作为稀释剂，苯乙烯因分子量较大，挥发性较差，在玻璃鳞片的鱼鳞结构良好的防渗遮蔽作用下，苯乙烯更难挥发，因此在玻璃鳞片胶泥施工完毕后较长时间内涂层中依然存在大量苯乙烯，安全隐患增加；苯乙烯蒸汽密度大于空气，当苯乙烯挥发后会沉降到施工区域底部，随着时间的延长，底部苯乙烯的浓度越来越高甚至会达到其爆炸极限。
At present, glass flake cement is mainly composed of about 60% 901 vinyl resin, ketone curing agent, 20% glass flake, 15% talcum powder and 2% styrene diluent. In order to make the coating fluidity, about 10% styrene is added as diluent. Styrene is volatilized because of its high molecular weight. Styrene is more difficult to volatilize under the good impervious shielding effect of the fish scale structure of glass flake, so there is still a large amount of styrene in the coating for a long time after the construction of glass flake cement, and the potential safety hazards increase; the steam density of styrene is higher than that of air, when styrene volatilizes, it will settle to the construction area. At the bottom, as time goes on, the concentration of styrene at the bottom gets higher and higher, even reaching its explosive limit.
玻璃鳞片胶泥的耐温极限大约在180℃左右，当遇到电焊等高温时，涂层遭到破坏，封闭在涂层内的苯乙烯、有机树脂等充分与空气接触具备了燃烧的条件从而产生燃烧，如玻璃鳞片胶泥的耐温幅度大幅升高至短暂高温不破坏，则会因涂层隔绝氧气而不具备燃烧条件而杜绝或延缓燃烧，但遗憾的是制作玻璃鳞片胶泥的树脂因结构原因无法实现较大幅度的耐温提升，且该成膜物自身就是可燃有机物。
The temperature resistance limit of glass flake cement is about 180 C. When encountering high temperature such as electric welding, the coating is destroyed, and the styrene and organic resin enclosed in the coating are fully in contact with the air to have combustion conditions, such as the temperature resistance of glass flake cement is greatly increased to short high temperature without destroying. However, it is regrettable that the resin used for making glass flake cement can not achieve a considerable increase in temperature resistance due to structural reasons, and the film itself is a combustible organic matter.
