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切削液油水分离器废水处理

  • 发表时间:2020-08-06 09:59:35
  • 来源:未知
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切削液油水分离器废水处理
  01切削液废水的来源及危害
 
  切削液废水主要来源于金属加工行业用于冷却、光滑防腐的切削液腐败、功能衰退。切削液废水呈乳白色,含有大量矿物油、动植物油、含油剂、表面活性剂、乳化剂、防腐剂等有机无机添加剂。Cod、油类等指标都很高,有毒,难以生物降解,对环境造成很大破坏。
 
  02
 
  切削液废水的主要处理方法
 
  切削液的主要处理方法有预处理和深度处理。预处理方法有酸化、盐析、凝集、混凝、吸附等;后处理方法有活性污泥法、生物滤池法和生物膜法。
 
  混凝+活性污泥法:在废水中加入破乳剂可有效提高水包油乳状液的界面张力,使污水中的油和胶体颗粒失去稳定的斥力和吸引力,最终失去稳定性,形成絮状物。经过进一步的化学架桥,最终完成污水中油水及其有毒有害物质的分离,实现污水含油物质的分离。COD下降。经过预处理后,采用活性污泥法进一步处理,最终达到排放标准。
 
  03
 
  切削液的典型处理工艺
 
  切削液废水→隔油→浮选→生化→出水
 
  04
 
  应用实例
 
  浙江省新型破乳剂混凝剂处理切削液废水的实例研究
 
  1水质
 
  a、废水处理量:100m3/h↓(加药)
 
  b、现场工艺流程:废水→除油机→调节池→混凝反应池→气浮→厌氧池→好氧池→沉淀池→吸附→出水
 
  2公司产品:gt-d03破乳剂混凝剂是一种具有高分子量和独特化学结构的无机高分子接枝共聚物,溶于水中后,能起到吸附桥和颗粒间电中和作用,使废水中的乳化油和胶体凝聚,分离沉淀;脱色、脱色一次完成脱色、除油效果好。
 
  5实验结论
 
  试验表明,切削液废水经gt-d03型破乳剂混凝剂处理后,可完成固液两相分离,固液两相絮凝分层明显,分离速度快,水质清澈,COD和油类物质均有大大减少了。由于gt-d03破乳剂的用量因素对实验效果有明显影响,因此有必要严格控制用量,具体用量见详细实验报告。
 
  6野外作业
 
  根据现场具体情况,我公司利用加药设备和计量泵,在混凝反应池入口均匀加入gt-d03破乳剂混凝剂,使其充分混合。气浮后,固液相分离完成,水质清澈。Cod由68000ppm降至7600ppm,SS由2960ppm降至45ppm,石油类由6800ppm降至21ppm,为后续生化系统的正常运行开辟了新的途径。预处理后的水进入厌氧-好氧生化处理,进一步处理水体中的污染物。沉淀池出水经活性炭吸附,使水质达到排放标准。
 
  01
 
  Source and damage of cutting fluid wastewater
 
  Cutting fluid waste water mainly comes from the metal processing profession used for cooling,smooth anti-corrosion cutting fluid corruption,functional decline.Cutting fluid wastewater is milky white,which contains a lot of mineral oil,animal oil and vegetable oil,oily agent,surfactant,emulsifier,preservative and other organic and inorganic additives.Cod,oil and other indicators are very high,toxic,difficult to biodegrade,and cause great damage to the environment.
 
  02
 
  Main treatment methods of cutting fluid wastewater
 
  The main treatment methods of cutting fluid include pretreatment and advanced treatment.The pretreatment methods include acidification,salting out,agglutination,coagulation,adsorption,etc.The post-treatment methods include activated sludge process,biological filter process and biofilm process.
 
  Coagulation+activated sludge process:adding demulsifier in the waste water can effectively improve the interfacial tension of the oil in water emulsion,so that the oil and colloidal particles in the sewage will lose stable repulsive force and attractiveness,and eventually lose stability and form flocs.After further chemical bridging,the separation of oil and water and its toxic and harmful substances in the sewage will eventually be completed and the sewage oil substances will be separated.And COD decreased.After pretreatment,the water conservancy will be further treated by activated sludge process,which will eventually meet the discharge standard.
 
  03
 
  Typical treatment process of cutting fluid
 
  Cutting fluid wastewater→oil separation→flotation→biochemical→effluent
 
  04
 
  Application examples
 
  A case study of using our new demulsifier coagulant to treat cutting fluid wastewater in Zhejiang Province
 
  1.Water quality
 
  a.Wastewater treatment capacity:100m3/h↓(dosing)
 
  b.On site process flow:wastewater→oil separator→conditioning tank→coagulation reaction tank→air flotation→anaerobic tank→aerobic tank→sedimentation tank→adsorption→effluent
 
  2.Company products:gt-d03 demulsifier coagulant is a kind of inorganic polymer graft copolymer with high molecular weight and unique chemical structure;after dissolved in water,it can play the role of adsorption bridge and electric neutralization between particles,agglomerate emulsified oil and colloid in wastewater,and separate precipitation;it has excellent oil removal,decoloration,COD removal effect,and completes the process of demulsification and coagulation at one time.
 
  5.Experimental conclusion
 
  Through the experiment,it can be seen that after the cutting fluid wastewater is treated by gt-d03 demulsifier coagulant,the solid-liquid two-phase separation can be completed,and the solid-liquid two-phase flocculation can be clearly stratified,and the separation speed is fast,the water quality becomes clear,and COD and oil substances have been greatly reduced.As the dosage factors of gt-d03 demulsifier have obvious influence on the experimental effect,it is necessary to strictly control the dosage,please refer to the dosage in the detailed experimental report.
 
  6.Field operation
 
  According to the detailed situation of the site,our company used the dosing equipment and metering pump to evenly add gt-d03 demulsifier coagulant to the inlet of the coagulation reaction tank to make it fully mixed.After air flotation,the solid-liquid phase separation was completed,and the water quality became clear.Cod decreased from 68000ppm to 7600ppm,SS from 2960ppm to 45ppm,and petroleum from 6800ppm to 21ppm,which created a new way for the normal operation of subsequent biochemical system Conditions.The pretreated water enters into anaerobic aerobic biochemical treatment to further treat the pollutants in the water body.The effluent from the sedimentation tank is adsorbed by activated carbon to make the water quality meet the discharge standard.
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