CN114225626A - 双氧水生产中碳纤维尾气吸收机组的解析方法 - Google Patents
双氧水生产中碳纤维尾气吸收机组的解析方法 Download PDFInfo
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Abstract
双氧水生产中碳纤维尾气吸收机组的解析方法,包括以下步骤:碳纤维箱体上连接真空管,真空管经过换热器与真空泵相连,碳纤维箱体内安装紫外灯;尾气进入碳纤维箱体内成吸附操作,尾气放空;然后向碳纤维箱体内注入饱和蒸汽,进行蒸汽解析,然后开启紫外灯以及真空泵抽气,解析后碳纤维箱体内的蒸汽和残留尾气组成的混合气被抽出碳纤维箱体;经板式换热器降温进入气液分离器,残留尾气中的芳烃气体液化后与蒸汽液化水合并为液相,液相进入回废芳烃储槽等待后续处理,剩余气相回到碳纤维尾气吸收机组的尾气进口再次进入机组循环。本方法在常规蒸汽解析过程后增加真空光解的过程,可以去除残留的芳烃,减小蒸汽解析时间,减小碳纤维箱体的损耗。
Description
技术领域
本发明涉及双氧水生产中碳纤维尾气吸收机组的解析方法。
背景技术
双氧水(学名过氧化氢,H2O2)主要用于纺织品、针织品、纸浆、草、藤、竹、木制品的漂白;三废(特别是废水)处理;有机及高分子合成(用作氧化剂、催化剂、引发剂、环氧化剂、交联剂等);有机及无机过氧化物(如过乙酸、过氧化苯甲酰、过氧化甲乙酮、过碳酸钠、过硼酸钠、过氧化钙、过氧化硫脲、己内酰胺、环氧丙烷等);电镀液的净化;食品工业中用于消毒、防腐、保鲜;电子工业中用作表面处理剂;医疗、医药行业中用于消毒;高浓度过氧化氢可用于火箭推进剂;其它如建材行业用作发泡剂;水处理行业用于杀菌、灭藻;化妆品行业中用作毛发漂白剂和染发剂。
蒽醌法是双氧水的工业生产主要方法,我国的双氧水产品有工业级、试剂级、食品级、医药级和电子级等几种,浓度ω(H2O2)有27.5%、30%、35%、50%、70%等多种规格。蒽醌法双氧水工艺中,氧化尾气中芳烃的回收是决定了生产成本的能耗问题,关键点是尾气排放必须要求,达标排放。现在广泛使用的碳纤维解析,碳纤维解析是采用一组并联的碳纤维箱体,每个碳纤维箱体上均设有尾气进口、尾气出口、蒸汽进口、蒸汽出口、干燥风进口、干燥风出口,尾气处理方式是,尾气先进入碳纤维箱体进行吸附步骤,然后通入蒸汽进行解析步骤,解析完成后尾气排空,然后用干燥风将碳纤维箱体吹干,然后重复使用,由于碳纤维解析机组内是一组并联的碳纤维箱体,各箱体之间循环工作,满足连续处理尾气的要求。现有的碳纤维解析是在常压条件下的解析,运行温度高,箱体受损严重,经常会出现许多漏点,不能满足当前的安全环保要求。
发明内容
本发明所要解决的技术问题是提供双氧水生产中碳纤维尾气吸收机组的解析方法,该方法在常规蒸汽解析过程后增加真空光解的过程,可以去除残留的芳烃,使得下一次吸附效果更好,从而减小蒸汽解析时间,减小碳纤维箱体的损耗。
为解决上述技术问题,本发明提供了双氧水生产中碳纤维尾气吸收机组的解析方法,包括以下步骤:
(1)在碳纤维尾气吸收机组的每个碳纤维箱体上均连接一个抽真空管,抽真空管合并后经过第一板式换热器与真空泵相连,在碳纤维尾气吸收机组的每个碳纤维箱体内均安装一个紫外灯;
(2)蒽醌法制备双氧水工艺中氧化尾气进入碳纤维尾气吸收机组的碳纤维箱体内,完成吸附操作,尾气放空;
(3)然后向放空尾气的碳纤维箱体内注入饱和蒸汽,进行30min蒸汽解析,然后开启紫外灯以及真空泵抽气20~30min,真空泵的真空度为-84~90kPa,解析后碳纤维箱体内的蒸汽和残留尾气组成的混合气被抽出碳纤维箱体;
(4)混合气先进入第一板式换热器降温至18~22℃,然后通过气液分离器,此时混合器中的蒸汽冷凝为液态水,残留尾气中的芳烃气体液化后与液态水合并为液相,液相进入回废芳烃储槽等待后续处理,剩余气相回到碳纤维尾气吸收机组的尾气进口再次进入机组循环。
(5)解析工序完成后进入干燥工序,干燥风机将风将碳纤维箱体内部吹扫干净,重新进入下一步吸附,循环使用。
为简单说明问题起见,以下对本发明所述的双氧水生产中碳纤维尾气吸收机组的解析方法均简称为本方法。
本方法的优点:本方法在常规蒸汽解析过程后增加真空光解的过程,在紫外光下真空光解,可以将芳烃分解碳化,有效去除残留在碳纤维箱体内的芳烃,使得下一次吸附效果更好,由于碳纤维箱体吸收效果更好,可以减小蒸汽解析时间,而且真空光解过程温度不会在碳纤维箱体内聚集,避免碳纤维箱体过热,减小碳纤维箱体的损耗。
为达到本发明更好的使用效果,其优选方案如下:
作为优选的,所述的真空泵采用的是水环式真空泵,水环式真空泵通过不锈钢管路连接有补液水槽,不锈钢管路中部串接有第二板式换热器,补液水槽向水环式真空泵补水的过程中通过第二板式换热器控制水环式真空泵内水温为10~16℃。
水环式真空泵内的水温升高后,真空度会有明显下降,影响系统正常运行,所以通过第二板式换热器降低补液的温度,控制水环式真空泵内水温在10~16℃,不影响水环式真空泵的真空压力。
作为优选的,所述的第二真空泵采用全焊式板式换热器,而且带有反冲洗功能。
采用全焊式板式换热器可以避免因长期使用后的漏点造成换热温度达不到要求,影响真空度,定期反冲洗保证板换的换热效果。
作为优选的,所述的紫外灯波长为254nm,强度为3000uw/cm2。
作为优选的,所述步骤(3)中饱和蒸汽温度为100~110℃。
附图说明
图1是本发明的流程示意图。
具体实施方式
参见图1,双氧水生产中碳纤维尾气吸收机组的解析方法,包括以下步骤:
(1)在碳纤维尾气吸收机组的每个碳纤维箱体上均连接一个抽真空管,抽真空管合并后经过第一板式换热器与真空泵相连,在碳纤维尾气吸收机组的每个碳纤维箱体内均安装一个紫外灯;
(2)蒽醌法制备双氧水工艺中氧化尾气进入碳纤维尾气吸收机组的碳纤维箱体内,完成吸附操作,尾气放空;
(3)然后向放空尾气的碳纤维箱体内注入饱和蒸汽,饱和蒸汽温度为100~110℃,进行30min蒸汽解析,然后开启紫外灯以及真空泵抽气20~30min,真空泵的真空度为-84~90kPa,所述的紫外灯波长为254nm,强度为3000uw/cm2。解析后碳纤维箱体内的蒸汽和残留尾气组成的混合气被抽出碳纤维箱体;
(4)混合气先进入第一板式换热器降温至18~22℃,然后通过气液分离器,此时混合器中的蒸汽冷凝为液态水,残留尾气中的芳烃气体液化后与液态水合并为液相,液相进入回废芳烃储槽等待后续处理,剩余气相回到碳纤维尾气吸收机组的尾气进口再次进入机组循环。
(5)解析工序完成后进入干燥工序,干燥风机将风将碳纤维箱体内部吹扫干净,重新进入下一步吸附,循环使用。
为简单说明问题起见,以下对本发明所述的双氧水生产中碳纤维尾气吸收机组的解析方法均简称为本方法。
本方法的优点:本方法在常规蒸汽解析过程后增加真空光解的过程,在紫外光下真空光解,可以将芳烃分解碳化,有效去除残留在碳纤维箱体内的芳烃,使得下一次吸附效果更好,由于碳纤维箱体吸收效果更好,可以减小蒸汽解析时间,而且真空光解过程温度不会在碳纤维箱体内聚集,避免碳纤维箱体过热,减小碳纤维箱体的损耗。
所述的真空泵采用的是水环式真空泵,水环式真空泵通过不锈钢管路连接有补液水槽,不锈钢管路中部串接有第二板式换热器,补液水槽向水环式真空泵补水的过程中通过第二板式换热器控制水环式真空泵内水温为10-16℃。
水环式真空泵内的水温升高后,真空度会有明显下降,影响系统正常运行,所以通过第二板式换热器降低补液的温度,控制水环式真空泵内水温在10-16℃,不影响水环式真空泵的真空压力。
所述的第二真空泵采用全焊式板式换热器,而且带有反冲洗功能。
采用全焊式板式换热器可以避免因长期使用后的漏点造成换热温度达不到要求,影响真空度,定期反冲洗保证板换的换热效果。
本实施例中给出的是四个碳纤维箱体的碳纤维机组,有的厂家使用的是二级吸收,则是用的六个箱体,分别记为A、B、C、D、E、F,例如:A/B一级吸附,通过联通阀进C/D二级吸附,然后尾气放空,吸附的同时E/F在解析过程中或者是干燥过程中;此处不管是四个箱体或者是六个箱体,回收的基本操作流程不变,工艺原理不变,都是通过碳纤维的吸附、解析、干燥三大步骤来完成氧化尾气的回收,只要在常规蒸汽解析过程后增加真空光解的过程,去除残留的芳烃,都没有超出本发明的保护范围。
Claims (5)
1.双氧水生产中碳纤维尾气吸收机组的解析方法,其特征在于,包括以下步骤:
(1)在碳纤维尾气吸收机组的每个碳纤维箱体上均连接一个抽真空管,抽真空管合并后经过第一板式换热器与真空泵相连,在碳纤维尾气吸收机组的每个碳纤维箱体内均安装一个紫外灯;
(2)蒽醌法制备双氧水工艺中氧化尾气进入碳纤维尾气吸收机组的碳纤维箱体内,完成吸附操作,尾气放空;
(3)然后向放空尾气的碳纤维箱体内注入饱和蒸汽,进行30min蒸汽解析,然后开启紫外灯以及真空泵抽气20~30min,真空泵的真空度为-84~90kPa,解析后碳纤维箱体内的蒸汽和残留尾气组成的混合气被抽出碳纤维箱体;
(4)混合气先进入第一板式换热器降温至18~22℃,然后通过气液分离器,此时混合器中的蒸汽冷凝为液态水,残留尾气中的芳烃气体液化后与液态水合并为液相,液相进入回废芳烃储槽等待后续处理,剩余气相回到碳纤维尾气吸收机组的尾气进口再次进入机组循环;
(5)解析工序完成后进入干燥工序,干燥风机将风将碳纤维箱体内部吹扫干净,重新进入下一步吸附,循环使用。
2.根据权利要求1所述的双氧水生产中碳纤维尾气吸收机组的解析方法,其特征在于:所述的真空泵采用的是水环式真空泵,水环式真空泵通过不锈钢管路连接有补液水槽,不锈钢管路中部串接有第二板式换热器,补液水槽向水环式真空泵补水的过程中通过第二板式换热器控制水环式真空泵内水温为10~16℃。
3.根据权利要求2所述的双氧水生产中碳纤维尾气吸收机组的解析方法,其特征在于:所述的第二真空泵采用全焊式板式换热器,而且带有反冲洗功能。
4.根据权利要求1所述的双氧水生产中碳纤维尾气吸收机组的解析方法,其特征在于:所述的紫外灯波长为254nm,强度为3000uw/cm2。
5.根据权利要求1所述的双氧水生产中碳纤维尾气吸收机组的解析方法,其特征在于:所述步骤(3)中饱和蒸汽温度为100~110℃。
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