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化学品干燥作业安全技术 | 2010-9-21 7:22:00

干燥按其热量供给湿物料的方式,可分为传导干燥、对流干燥、辐射干燥和介电加热干燥。干燥按操作压强可分为常压干燥和减压干燥;按操作方式可分为间歇式干燥与连续式干燥。常用的干燥设备有厢式干燥器,转筒干燥器、气流干燥器、沸腾床干燥器、喷雾干燥器。为防止火灾、爆炸、中毒事故的发生,干燥过程要采取以下安全措施:

  1当干燥物料中含有自燃点很低或含有其他有害杂质时必须在烘干前彻底清除掉,干燥室内也不得放置容易自燃的物质。

  2干燥室与生产车间应用防火墙隔绝,并安装良好的通风设备,电气设备应防爆或将开关安装在室外。在干燥室或干燥箱内操作时,应防止可燃的干燥物直接接触热源,以免引起燃烧。

  3干燥易燃易爆物质,应采用蒸汽加热的真空干燥箱,当烘干结束后,去除真空时,一定要等到温度降低后才能放进空气;对易燃易爆物质采用流速较大的热空气干燥时,排气用的设备和电动机应采用防爆的;在用电烘箱烘烤能够蒸发易燃蒸气的物质时,电炉丝应完全封闭,箱上应加防爆门;利用烟道气直接加热可燃物时,在滚筒或干燥器上应安装防爆片,以防烟道气混入一氧化碳而引起爆炸。

  4.间歇式干燥,物料大部分靠人力输送,热源采用热空气自然循环或鼓风机强制循环,温度较难控制,易造成局部过热,引起物料分解造成火灾或爆炸。因此,在干燥过程中,应严格控制温度。

  5.在采用洞道式、滚筒式干燥器干燥时,主要是防止机械伤害。在气流于燥,喷雾干燥、沸腾床干燥以及滚筒式干燥中,多以烟道气、热空气为干燥热源。

  6.干燥过程中所产生的易燃气体和粉尘同空气混合易达到爆炸极限。在气流干燥中,物料由于迅速运动相互激烈碰撞、摩擦易产生静电;滚筒干燥过程中,刮刀有时和滚筒壁摩擦产生火花,因此,应该严格控制干燥气流风速,并将设备接地;对于滚筒干燥,应适当调整刮刀与筒壁间隙,并将刮刀牢牢固定,或采用有色金属材料制造刮刀,以防产生火花。用烟道气加热的滚筒式干燥器,应注意加热均匀,不可断料,滚筒不可中途停止运转。斗口有断料或停转应切断烟道气并通氮。干燥设备上应安装爆破片。

Re:化学品干燥作业安全技术 | 2010-9-21 7:24:49
章仁根化学品干燥过程易发生火灾,作业中安全技术措施要落实.
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原创 | 2016-9-6 20:35:10
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原创 | 2016-9-28 20:11:15
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原创 | 2016-9-30 14:51:40
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Re:在漫画中识别身边的违章 | 2016-10-9 14:42:34
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Re:在漫画中识别身边的违章 | 2016-10-11 13:33:13
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Re:在漫画中识别身边的违章 | 2016-10-14 16:00:27
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Re:在漫画中识别身边的违章 | 2016-10-14 23:57:35
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Re:在漫画中识别身边的违章 | 2016-10-15 20:00:50
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Re:在漫画中识别身边的违章 | 2016-10-19 14:11:49
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Re:在漫画中识别身边的违章 | 2016-10-19 14:12:39
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Re:在漫画中识别身边的违章 | 2016-10-21 5:49:19
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Re:在漫画中识别身边的违章 | 2016-10-22 3:05:53
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Re:在漫画中识别身边的违章 | 2017-2-18 18:42:02
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Re:在漫画中识别身边的违章 | 2017-3-4 13:29:52
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Re:在漫画中识别身边的违章 | 2017-3-4 13:49:16
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