CN113060910B - 联合轧钢企业综合处理乳化液含油滤纸的方法 - Google Patents
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Abstract
一种联合轧钢企业综合处理乳化液含油滤纸的方法，油滤纸处置方式是利用联合轧钢企业的另一种废弃物——浓碱废水来处置含油滤纸，实现以废治废的综合治理，达到更环保的处置。联合轧钢企业有相对完整的工序，各工序的废弃物、余热、资源以及水处理等设施相对完善，能够实现此新方法处置后产物的处理。
Description
技术领域
本发明涉及一种乳化液含油滤纸处理方法，具体是一种联合轧钢企业综合处理乳化液含油滤纸的方法。
背景技术
目前轧钢企业的乳化液系统需要用到滤纸来过滤乳化液中的浮渣，过滤的同时滤纸会吸附大量乳化液，用完的滤纸必须当做含油危废送至有资质的危废处置单位处置，处置方法有焚烧和填埋两种。
焚烧不可避免会有VOCs产生以及碳排放，污染大气，并非最环保的处置方式，只是目前相对环保的一种处置方式。
填埋虽然有防渗透措施，但是不可避免会有少量的油随雨水进入土壤，或者有挥发，污染大气，也仅仅是相对较环保的处置方式。
本发明油滤纸处置方式是利用联合轧钢企业的另一种废弃物——浓碱废水来处置含油滤纸，实现以废治废的综合治理，达到更环保的处置。联合轧钢企业有相对完整的工序，各工序的废弃物、余热、资源以及水处理等设施相对完善，能够实现此新方法处置后产物的处理。
发明内容
本发明的目的是提供一种联合轧钢企业综合处理乳化液含油滤纸的方法，以解决上述问题的至少一个方面。
根据本发明的一方面，提供一种联合轧钢企业综合处理乳化液含油滤纸的方法：步骤一，乳化液滤纸采用涤纶材质，过滤精度便于控制，油吸附量少，且结实，无断纤污染乳化液；
步骤二，浓碱废水采用联合轧钢企业碱洗产生的废弃物，即浓碱废水，含油、铁以及碱，pH13，COD8000-13000mg/L；
步骤三，将浓碱废水加入片碱将pH值调至14，将含油乳化液滤纸浸入浓碱废水中，加热至90℃，加入十六烷基三甲基氯化铵作为催化剂，搅拌约5-15分钟可见乳化液滤纸开始被打散，搅拌约30分钟可见滤纸已完全水解，溶液中只剩油泥和灰分；
步骤四，将油泥过滤出来后使用盐酸破乳，得到清液、含灰分的浮油；
步骤五，将步骤四中得到的清液混入步骤三的清液，检测COD约15000mg/L，将此清液送入浓碱废水经过破乳、中和、絮凝、气浮、生化、絮凝、澄清、过滤工艺处置后，碱废水处理系统出水COD42mg/L，含油0.3mg/L，悬浮物3.1mg/L，达到工业废水排放标准；
步骤六，含灰分的浮油送入含油废水处理系统，经过进一步破乳、中和、絮凝、气浮、超滤、纸带机过滤、二次中和、生化、MBR、澄清、过滤工艺处置后，油废水处理系统出水COD47mg/L，含油0.4mg/L，悬浮物2.2mg/L，浮油收集到储油池当做危废二次资源出售。
本发明的有益效果是：利用联合轧钢企业的另一种废弃物——浓碱废水来处置含油滤纸，实现以废治废的综合治理，达到更环保的处置。
具体实施方式
下面结合具体实施例对本发明做进一步的说明。
在一些实施例中，步骤一，乳化液滤纸使用的是涤纶材质，过滤精度便于控制，油吸附量少，且结实耐用，无断纤污染乳化液，是目前最经济实用的滤纸材料。
步骤二，浓碱废水是联合轧钢企业碱洗产生的废弃物，联合轧钢企业的退火预处理工艺需要使用碱液清洗冷轧产出的带钢上残留的乳化液，为保证带钢清洗效果，需要采用超滤系统将碱液中的铁粉和浮油滤出，滤出液含有碱液，即浓碱废水，含油、铁以及碱，pH13，COD8000-13000mg/L。
步骤三，本发明将浓碱废水加入微量片碱将pH值调至14，将含油涤纶滤纸浸入浓碱废水中，加热至90℃，加入微量十六烷基三甲基氯化铵作为催化剂，搅拌约8分钟左右可见滤纸开始被打散，搅拌约30分钟可见滤纸已完全水解，溶液中只剩油泥和灰分。
步骤四，本发明将油泥过滤出来后使用盐酸破乳，得到清液、含灰分的浮油。
步骤五，本发明将步骤四中分离得到清液混入步骤三，再经过步骤四得到清液，检测COD约15000mg/L，将此清液送入浓碱废水经过破乳、中和、絮凝、气浮、生化、絮凝、澄清、过滤等工艺处置后，碱废水处理系统出水COD42mg/L，含油0.3mg/L，悬浮物3.1mg/L，达到工业废水排放标准。
步骤六，将上述含灰分的微量浮油送入含油废水处理系统，经过进一步破乳、中和、絮凝、气浮、超滤、纸带机过滤、二次中和、生化、MBR、澄清、过滤等工艺处置后，油废水处理系统出水COD47mg/L，含油0.4mg/L，悬浮物2.2mg/L，浮油收集到储油池当做危废二次资源出售。
至此原乳化液含油涤纶滤纸完全分类处置，吸附的油转化为浮油，灰分经过油系统的纸带机、气浮、超滤等过滤出来，涤纶水解后经碱生化降解，各项二级产物均得到合法合规处置，实现废弃物无害化处置。
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本发明的保护范围。
Claims (2)
1.一种联合轧钢企业综合处理乳化液含油滤纸的方法，其特征在于：步骤一，乳化液含油滤纸采用涤纶材质，过滤精度便于控制，油吸附量少，结实，无断纤污染乳化液；
步骤二，浓碱废水采用联合轧钢企业碱洗产生的废弃物，即浓碱废水，含油、铁以及碱，pH13，COD8000-13000mg/L；
步骤三，将浓碱废水加入片碱将pH值调至14，将乳化液含油滤纸浸入浓碱废水中，加热至90℃，加入十六烷基三甲基氯化铵作为催化剂，搅拌5-15分钟可见乳化液含油滤纸开始被打散，搅拌30分钟使乳化液含油滤纸完全水解，溶液中为油泥和灰分；
步骤四，将油泥过滤出来后使用盐酸破乳，得到清液、含灰分的浮油；
步骤五，将步骤四中分离后的清液混入步骤三，再经过步骤四得到清液，检测COD15000mg/L，将此清液送入浓碱废水经过破乳、中和、絮凝、气浮、生化、絮凝、澄清、过滤工艺处置后，出水COD42mg/L，含油0.3mg/L，悬浮物3.1mg/L，达到工业废水排放标准；
步骤六，含灰分的浮油送入含油废水处理系统，经过进一步破乳、中和、絮凝、气浮、超滤、纸带机过滤、二次中和、生化、MBR、澄清、过滤工艺处置后，含油废水处理系统出水COD47mg/L，含油0.4mg/L，悬浮物2.2mg/L，浮油收集到储油池当做危废二次资源出售。
2.根据权利要求1所述的联合轧钢企业综合处理乳化液含油滤纸的方法，其特征在于：步骤二中，联合轧钢企业的退火预处理工艺需要使用碱液清洗冷轧产出的带钢上残留的乳化液，为保证带钢清洗效果，需要采用超滤系统将碱液中的铁粉和浮油滤出，滤出液含有碱液，即浓碱废水，含油、铁以及碱，pH13，COD8000-13000mg/L。
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