Non-ferrous Smelting Polymetallic Waste Acid Resource Management Technology
admin
2022-09-16
有色冶炼多金属废酸资源化治理技术
Non-ferrous Smelting Polymetallic Waste Acid Resource Management Technology
技术编号
HUN-013
提供单位
中南大学、赛恩斯环保股份有限公司
技术大类
污染控制技术
联系人
王庆伟
技术类型
水污染物控制技术
电话
15116211257
邮箱
5957257@qq.com
适用范围
有色冶炼、电镀等行业含金属酸性废水处理
推荐单位
中国有色金属工业协会
-
Technical principle and process routeThis technique controls the partial pressure of H2S to regulate step sulfurization reactions taken place between H2S and polymetallic acidic wastewater (popularly named dirty acid) in an enhanced gas-liquid sulfurizing reactor. Thus, different components in the dirty acid can be gradually sulfurized and separated. As a result, the valuable resources in dirty acid are recovered. The residual acid after sulfurization is concentrated by thermal-electric coupling technology, i.e., multi-effect evaporation coupled with selective electrodialysis, followed by hot air blowing to intensify gas-liquid mass transfer to transform the volatile hydrogen chloride and hydrogen fluoride in the liquid acid to the vapor gas. Thus, the fluorine and chloride ions in concentrated acid are separated efficiently. Then the concentrated sulfuric acid containing low fluorine and chloride ions is recycled and reused in the workshop. The separated fluorine and chloride can be captured and recycled as calcium slat products.
-
技术提供方中南大学、赛恩斯环保股份有限公司
-
技术主要指标信息开发了重金属酸性废水成套装备,集成了选择性吸附、气液强化硫化、电-热耦合酸浓缩、氟氯催化吹脱、氟氯盐分离5个模块;
-
商业应用情况新技术已在五矿株冶有色、紫金矿业集团、江铜集团、宝武集团等国内十多家特/大型铜、锌、钢铁冶炼企业工业化应用多年,并已在“一带一路”俄罗斯、塞尔维亚等国家推广应用,经济环境效益显著。
-
希望在技术转移过程中得到的帮助/支持
-
商业应用单位联系人/电话/邮箱
-
设备投资以湖南某企业污酸废水与资源化利用项目为例:项目处理规模为576m3/d,项目性质为新建。本项目设计系统主要分为气液强化硫化处理系统、电渗析系统、电渗析系统、催化吹脱系统四个部分,分别为:(1)气液强化硫化处理系统,(2)电渗析系统;(3)电渗析系统;(4)催化吹脱系统 。 工程总投资为6033.43万元。具体见申报书4-1。
-
年运行维护费用以湖南某企业污酸废水与资源化利用项目为例:项目规模为处理污酸576m3/d,处理站每年需要的运行维护成本(包括电费、蒸汽费、废渣处理费、耗材费用)为1531.35万元,折合吨液成本为72.80元。具体见申报书表4-6运行费用。
-
投资回收期以湖南某企业污酸废水与资源化利用项目为例:项目规模为处理污酸576m3/d,项目工程投资估算为6033.43万元,项目建成后与常规工艺相比每年可节约生产成本4299.07万元,年运行成本为1531.35万元,静态投资回收期为2.17年。
-
附加效益新工艺可回收废酸中的硫酸、有价金属资源、硫酸钠和水资源;可年回收浓硫酸量为2.82万t,按200元/吨计,则年回收硫酸价值为564.0万元;年回收锌115.60t,按锌价格1.69万元/t,计价系数0.75计算,则年回收锌价值146.52万元;年回收水量19.23万t,按水价2.21元/t计算,则年回收水量价值42.50万元;年回收硫酸钠1492.85吨,按硫酸钠回收价格100元/吨计算,则年回收硫酸钠价值14.93万元。合计767.95万元
-
综合效益有色冶炼多金属废酸资源化治理技术与现有的“硫化钠+石灰中和”工艺相比,在经济上具有如下优势,以湖南某冶炼企业污酸废水处理规模576m3/d为例进行分析。 采用新工艺,每年可节约硫化剂341.43t,按工业硫化钠2100元/t计算,则年节约硫化剂71.70万元;酸回收利用,每年可减少石灰用量为0.76万吨,按市场价350元/t,减少石灰费用266.12万元;合计药剂费节约至少337.82万元;新工艺实现了对砷的深度脱除,气液硫化反应产生的砷品位提高,减少砷渣产生量和处置成本339.3万元。酸通过浓缩后回用于系统,污酸无需石灰中和处理,大幅减少中和渣产生量,每年可减少中和渣3.5万吨,按照处置费800元/吨计算,可节约处理成本2800万元。每年节约废渣处置费用为3139.3万元。新工艺可回收硫酸、锌资源、硫酸钠和水资源,年回收资源价值为767.95万元。新工艺与常规中和工艺相比每年可节约生产成本4299.07万元; 处理后废水重金属浓度符合国家标准,。危废量较国际现行方法削减90%以上,降低重金属危废堆存产生的二次污染风险,环境效益显著。
-
障碍对技术转移影响等级新技术替代传统技术,老企业面临技术升级的资金、场地、建设周期等的影响;新建企业已全部采用新技术建设。
-
提交日期2020/12/31
-
技术成熟度技术成熟度高;新技术已在紫金矿业集团、江铜集团、宝武集团等国内十多家特/大型铜、锌、钢铁冶炼企业工业化应用多年,生产稳定可靠。并已在“一带一路”国家推广应用,技术实施效果显著。 2014年12月28日,“有色冶炼烟气洗涤污酸废水治理与资源化利用新技术”由中南大学与赛恩斯环保联合,经中国有色金属工业协会组织鉴定,编号:中色协科(鉴)字【2014】第141号,由邱定番、段宁、张杰、张海文等9位院士及专家评审,表明该技术为国内外首创,工艺技术居国际领先水平。 冶炼多金属废酸资源化治理关键技术获2018年国家技术发明奖,二等奖;铜冶炼污酸治理与资源化新工艺及装备获2016年中国有色金属工业协会科学技术奖,一等奖;典型重金属污染物解毒去除方法及机理,获2017年湖南省人民政府、湖南省自然科学奖,一等奖;湘江流域重金属污染防治技术研发与应用,获2017年湖南省人民政府,湖南省科技创新奖;“污酸废水气液处理技术装备”列入《国家鼓励发展的重大环保技术装备目录(2017年版)》;
-
Technical applicability analysisThe treatment and recycling equipment kits for dirty acid have the advantages of high recovery efficiency of heavy metals and acid solution, low amount of residue production, low treatment cost, as well as clean process and simple operation. The equipment is applicable to the treatment of acid washing wastewater from various smelting flue gas, and provides a new and safe environmental protection complete set with high efficiency for treatment of acid washing wastewater from smelting flue gas. At present, the patented technology is mainly applied to trea t wastewater produced from nonferrous mining, beatification, and smelting industries. It can recover valuable elements and safe dispose of harmful elements in acid wastewater, finally the target of resource recovery from dirty acid is realized. It is expected that this technology can safely be generalized its application to the treatment of acid and heavy metals-containing wastewater in industries involving electroplating, hot galvanizing, non-ferrous metal calendaring, iron and steel, secondary lead, new energy battery, waste e-waste recycling, fluorine chemistry, phosphorus chemistry, semiconductor, and others.
-
Technical stability analysisThe new technology has been industrially applied for many years in more than ten China domestic super / large copper, zinc, and steel smelting enterprises with a stable and reliable operation, including Zijin Mining Group, Jiangxi Copper Group, and Baowu group. To improve the level of automatic, high-efficient, and safe operation, at the same time, reduce manual operation and accident occurrence, this technology is equipped with a high-level automatic control system. For each system including gas generation, enhanced gas-liquid sulfurization, electro-thermal coupling acid concentration, fluorine chlorine salt separation, copper-arsenic separation, waste gas absorption, a centrally controlled automatic start-stop device is designed and equipped according to their procedure, timing and logic during wastewater treatment. Thus, the operation of gas generation and sulfurization reactions, electrodialysis, evaporation, and blowing off can be automatically controlled. Meanwhile, the outlet water quality and the concentration of recovered acid are monitored, detected, and controlled automatically. The data log can be uploaded in real-time. During the realization of flexible remote monitoring, wastewater treatment sites can make timely adjustment according to the uploaded monitoring data to ensure its stable operation.
-
Technical safety analysisThis technology adopts a high-efficient full-closed gas-liquid reaction system. The utilization rate of H2S reaches more than 99.9%. Trace tail H2S gas is absorbed by dirty acid and the discharged gas is sprayed and absorbed by alkali liquid in a packed tower. This technique solves the problem of H2S poisoning risk that has plagued the enterprise for a long time. Additionally, a 4-level safety protection system and auto-alarm of automatic identification and response capability are applied to reduce the safety accident risk for enterprises, thus, the level of safety production is improved and guaranteed. The produced equipment kits adopt an intelligent automatic controlled acid wastewater recycling system. The working conditions of on-site personnel are significantly improved and there is no risk of endangering workers' health. Furthermore, the generation of hazardous waste is greatly reduced, hence, the treatment cost is also reduced. Moreover, there is no secondary pollution generation during the treatment process. Therefore, this technology can be regarded as a green and advanced new-generation technology for smelting waste acid treatment.
-
技术转移推广障碍0
-
知识产权转让中南大学申请专利11件,中南大学和赛恩斯环保共同申请专利29件,含美国PCT专利1件。本技术的知识产权的归属为中南大学和赛恩斯环保双方共同拥有,双方联合以产学研的方式共同推广。该技术装备已成功实现全部国产化的生产。