The utility model belongs to the technical field of chromium-containing wastewater treatment, in particular to a complete set of equipment for treating chromium-containing wastewater and reducing chromium sludge in tannery industry, including a chromium water collection tank connected sequentially to regulate the PH of chromium-containing wastewater, a demulsification air floatation tank and a membrane filtration system for removing grease and suspended substances in the chromium-containing wastewater. One end of the membrane filtration system is connected with a concentrated water collection tank. The opposite end is connected with a filter liquid collecting tank, the concentrated water collecting tank is connected with a dosing sedimentation tank with coagulation AIDS built in, one end of the dosing sedimentation tank is connected with a chromium water collecting tank, and the opposite end is connected with a chromium mud pressure filter. The complete set of equipment for treating chromium-containing wastewater and reducing chromium mud in tannery industry proposed by the utility model can reduce the production of chromium mud by adding chemicals instead of traditional chemical precipitation process, improve the clean production level of tannery enterprises and reduce the production of hazardous wastes through treating chromium-containing wastewater and reducing chromium mud in tannery industry.
【技术实现步骤摘要】
一种制革工业含铬废水处理、铬泥减量成套设备
本技术涉及制革工业含铬废水处理、铬泥减量成套设备,通过技术实施提高制革企业的清洁生产水平,大大减少制革工业铬泥危废,降低企业经营成本。属于含铬废水处理
,适用于新建处理制革工业含铬废水处理、铬泥减量成套设备。
技术介绍
制革行业属于国家环保治理规划的重点行业,也是涉重金属排放的行业。制革加工中铬水主要产生于鞣制、复鞣、中和、染色、加脂、技术等几个工序,占制革废水总水量的40--50%,总铬含量在200--500mg/L。而目前国内现有废水处理技术在制革含铬废水处理上还是采用传统的加碱(氢氧化钠、石灰)、混凝剂(聚合氯化铝、硫酸亚铁等)、聚丙烯酰胺混凝沉淀法。该方法主要存在药剂消耗大、稳定达标困难,有时需要二次加药才能达到含铬废水车间排放口总铬排放小于1.5mg/l的要求,运行成本高、铬水加碱沉淀需要同时投加大量的辅助药剂(石灰、混凝剂、聚丙烯酰胺)才能形成絮体沉淀,铬泥的产生很大,而铬泥属于危废,处理成本在3000—5000元/吨。国家对危废监管有严格要求,制革行业大量的含铬污泥必将成为制约行业和企业发展及未来生存的大问题。现今已有申请公布号CN102399037A,申请公布日2012.04.04的中国专利了公开了一种含铬废水的处理方法,包含以下步骤:(1)在调节池中处理:将含铬废水输送到调节池中滤除悬浮物后,进行水质及水量均衡;(2)在处理池中处理:将调节池的含铬废水输出到处理池中,加入硫酸调整pH值在2.5-3.2之间,然后加入硫酸亚铁并进行搅拌10-20分钟;(3)中和处理:各处理池中加入碱性物质进行 ...
【技术保护点】
1.一种制革工业含铬废水处理、铬泥减量成套设备,其特征在于:包括依次连接的用于调节含铬废水PH的铬水收集池、用于去除所述含铬废水内的油脂和悬浮物的破乳气浮池和膜过滤系统,所述膜过滤系统一端连接有浓水收集池,相对的另一端连接有滤过液收集池,所述浓水收集池连接有内置有混凝助凝剂的加药沉淀池,所述加药沉淀池一端连接有铬水收集池,相对的另一端连接有铬泥压滤机。
【技术特征摘要】
1.一种制革工业含铬废水处理、铬泥减量成套设备,其特征在于:包括依次连接的用于调节含铬废水PH的铬水收集池、用于去除所述含铬废水内的油脂和悬浮物的破乳气浮池和膜过滤系统,所述膜过滤系统一端连接有浓水收集池,相对的另一端连接有滤过液收集池,所述浓水收集池连接有内置有混凝助凝剂的加药沉淀池,所述加药沉淀池一端连接有铬水收集池,相对的另一端连接有铬泥压滤机。2.根据权利要求1所述的制革工业含铬废水处理、铬泥减量成套设备,其特征在于:所述铬水收集池前端...
【专利技术属性】
技术研发人员:徐军富,傅继达,
申请(专利权)人:杭州绿夏环境科技有限公司,
类型:新型
国别省市:浙江,33
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