A dyeing wastewater advanced treatment device and method

CN122897567APending Publication Date: 2026-10-13ZHEJIANG HANGZHOUWAN TEXTILE GOODS
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Patent Information

Application Number
CN202611321948.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-08-28
Publication Date
2026-10-13

AI Technical Summary

Technical Problem

压滤机进料压力一般为定值或仅依靠人工经验调节,当沉降速率缓慢、沉降出水含固量升高时,固定进料压力易导致滤布快速堵塞或固液分离效率下降,阻碍处理连续进行

Benefits of technology

依据印染废水原水的光谱吸收曲线提取特征吸收峰位置和特征吸收峰强度,以染料类型标识和浓度分级作为索引,从预设工况映射表中直接获得废水处理工况区间。该工况区间包含脉冲放电频率下限值和上限值,在此区间内配置初始放电频率、放电间距和放电电压幅值,使脉冲放电氧化处理基准自动与来水染料构成和污染负荷实现对应匹配。当染料类型改变引起特征吸收峰发生位移时,映射得到的工况区间随之改变,放电参数的选取区间相应迁移;当染料浓度升降带来特征吸收峰强度变化时,浓度分级调整,映射脉冲放电频率下限值和上限值作出对应伸缩。以此方式避免固定放电参数在高浓度废水中氧化深度不足、在低浓度废水中放电能量过度注入的情况,使预氧化处理实时跟随进水水质波动,减少无效放电能耗,同时维持活性物种供应与有机污染物去除需求之间协调。通过浊度传感器在沉降池多个深度层位获取浊度时序数据,提取各深度层位浊度下降至稳定阈值的时刻,由此计算絮体沉降速率。将计算得到的絮体沉降速率与预设的负相关映射关系曲线比对,从中提取压力调整系数,并相应调高或调低压滤机进料压力。当预氧化处理强化、絮体生成致密且沉降速率加快时,沉降出水中夹带的微小絮团减少,此时自动减小进料压力,可降低滤布表面滤饼压密速率,延缓过滤阻力上升,延长过滤周期;当预氧化稍弱、絮体结构松散、沉降速率下降时,沉降出水含固量上升,此时自动增大进料压力,使滤室进料推力足以克服高固体通量带来的阻力增量,维持固液分离效率。该调整不需人工干预,直接依据沉降行为实时响应,克服了固定进料压力在沉降性能变化时出现的堵塞频发或滤液通量损失。将压滤透过液的残余色度值与预设色度阈值比较得到色度偏差量,将残余化学需氧量与预设化学需氧量阈值比较得到化学需氧量偏差量,二者加权求和形成综合偏差量,以此作为修正脉冲放电频率的反馈量。当综合偏差量大于零,表明出水有机物和色度残余超标,增大放电频率一个步进单位,并约束在工况区间内,以提高氧化强度;当综合偏差量小于零,表明氧化过度,降低放电频率一个步进单位。每次调整后更新脉冲放电氧化处理基准,并在下一个运行循环中重新评价出水指标,形成迭代收敛。当综合偏差量绝对值低于预设收敛阈值时停止修正,所得放电频率作为深度处理控制参数,直接设定脉冲放电电源的输出脉冲宽度和占空比。该反馈机制使最终出水的残余色度和残余化学需氧量持续逼近并稳定在控制目标以内,不受原水水质缓慢变化和电极老化等因素影响,保障出水指标一致性。

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Abstract

The application discloses a kind of printing and dyeing wastewater advanced treatment device and method, belong to printing and dyeing wastewater treatment technical field.The method includes obtaining the water quality characteristic parameter of printing and dyeing wastewater raw water, based on water quality characteristic parameter mapping to wastewater treatment working condition interval;Pulse discharge oxidation treatment reference is configured in wastewater treatment working condition interval, and pre-oxidation treatment is executed;Coagulation sedimentation treatment is executed to pre-oxidation treatment water body, and flocculation settling velocity is determined based on water body turbidity distribution;According to flocculation settling velocity, adjust filter press feed pressure, and execute pressure filtration separation to the water body after coagulation sedimentation, obtain pressure filtration permeate;Residual chroma value and residual COD value of pressure filtration permeate are collected, and the feedback quantity is used to iteratively correct pulse discharge oxidation treatment reference, as depth treatment control parameter is completed processing.The method can dynamically match discharge parameter according to incoming water quality, and adjust filtration pressure, utilize effluent index closed loop to optimize oxidation intensity, improve the adaptability and stability of wastewater treatment process.
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