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Combined PTA and PET plant waste water purification and recycle
Combined PTA and PET plant waste water purification and recycle
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机译:PTA和PET合并的废水净化和循环利用
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摘要
A process for treating aqueous condensate liquor from a polyester plant 300 in an integrated terephthalic acid polyester plant comprises: contacting a portion of the aqueous condensate liquor from a polyester plant with an aqueous mother liquor from a terephthalic acid purification plant process to form a combined stream. The combined stream is provided to a pure plant mother liquor solvent extraction process 400 to separate the combined stream into an aqueous stream and organic stream. The aqueous stream is contacted with an alkali to form a pH adjusted stream and the pH adjusted stream is contacted with a filter to form a treated stream. The treated stream is contacted with a reverse osmosis unit to form an RO permeate stream. The permeate stream may be recycled back into the integrated PTA PET plant. Advantageously the process provides for water recovery and better water recycling thus reducing operating costs and providing a more environmentally friendly process.
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机译: (54)标题:废水净化厂和用于净化废水的方法(54)Bezeichnung:ABWASSERREINIGUNGSANLAGE SOWIE VERFAHREN ZUR ABWASSERREINIGUNG(57)摘要:本发明涉及一种具有(a)进气混合罐(3)的废水净化厂, b)具有第一和第二槽段的组合反应沉淀池(1、2),c)其中d)在进气混合槽(3)和第一槽段之间设置有第一连接点(11)(b) 1)在第一箱段(1)的下部箱区c2)中,第一泵(12)布置在第一连接点(i1)并可以被驱动以输送来自第一箱段(1)的回流污泥(3),c3)在第一水箱部分(I)的上水箱区域k和d)上布置了一个第一澄清水排放点(13),其中di)一个第二连接点(在山高的下部储罐区中,在进气混合储罐(3)和第二储罐部分(2)之间布置有一个21)