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彩涂机组排放哪些废水,需要怎么处理系统

返回列表 来源: 发布日期: 2021.03.30

彩涂机组的废水排放点主要集中在预处理段和辊涂室

辊涂室的是废水类型主要是清洗辊子后的废溶剂和废涂料,还有涂料用后臣在桶底地步的沉渣。

预处理段根据机组在表面处理工艺的选型不同而有所区别。比如:

img21

(1)碱洗脱脂-反应型化学成膜。主要废水类型:脱脂废水,磷化废水;3)表面调整废水;4)钝化废水。

(2)碱洗脱脂-酸洗除锈-反应型化学成膜。主要废水类型:1)脱脂废水;2)酸洗废水;3)磷化废水;4)表面调整废水;5)钝化废水。
(3)碱洗脱脂辊涂型化学成膜。主要废水类型:1)脱脂废水;2)辊涂铬化废水。
(4)碱洗脱脂-酸洗除锈辊涂型化学成膜。主要废水类型:1)脱脂废水;2)0酸洗废
水;3)辊涂铬化废水。
废水处理的流程一般采用三级处理的原则
级处理:用机械方法或简单的化学方法进行预处理使悬浮物沉淀,并中和酸碱
度。
可要需一气:
二级处理:采用生物处理或添加混凝剂,使可分解、可氧化有机物经生化处理而消纳;或使悬浮物、油物经破乳、凝聚而分离。
三级处理:采用活性炭吸附、离子交换、电渗析、反渗析和化学氧化等对难分解、处理的有机物、无机物作深度的处理。
The type of waste water in the roller coating room is mainly the waste solvent and coating after cleaning the roller, as well as the sediment at the bottom of the barrel after coating.
The pretreatment section is different according to the selection of surface treatment process. For example:
(1) Alkali washing degreasing reactive chemical film forming. Main wastewater types: degreasing wastewater, Phosphating Wastewater; 3) surface adjustment wastewater; 4) passivation wastewater
(2) Alkali washing degreasing acid pickling derusting reactive chemical film forming. Main wastewater types: 1) degreasing wastewater; 2) pickling wastewater; 3) Phosphating Wastewater; 4) surface adjustment wastewater; 5) passivation wastewater.
(3) Alkali wash degreasing roll coating chemical film forming. Main wastewater types: 1) degreasing wastewater; 2) roller coating chromizing wastewater.
(4) The chemical film was formed by alkali washing degreasing pickling derusting roll coating. Main wastewater types: 1) degreasing wastewater; 2) 0 pickling wastewater
3) roller coating chromizing wastewater.
The process of wastewater treatment generally adopts the principle of three-stage treatment
Stage treatment: pretreatment by mechanical or simple chemical methods to precipitate suspended solids and neutralize acid and alkali
Degree.
It takes a breath:
Secondary treatment: adopt biological treatment or add coagulant to make decomposable and oxidizable organic matter absorbed by biochemical treatment; or make suspended matter and oil separated by demulsification and coagulation.
Three stage treatment: advanced treatment of refractory organic and inorganic substances by activated carbon adsorption, ion exchange, electrodialysis, reverse osmosis and chemical oxidation.

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