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Acrylic fiber wastewater of the Acrylic silkwaste dry flocculant synthesis and flocculation mechanism

Author: CaiXiaoDong
Tutor: ZhengZuo
School: Tianjin Polytechnic University
Course: Applied Chemistry
Keywords: Polyacryamide hydrolysis complex the acrylic fiber waste silk flocculation mechanism CODcr
CLC: TQ340.9
Type: Master's thesis
Year: 2006
Downloads: 144
Quote: 0
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Abstract


Waste water of the acrylic fibers is a kind of waste water containing high concentration organic compound ,It is difficult to deal with.To deal with the polypropylene nitrile (PAN)waste fiber,there are two major kinds of methods at present:the hydrolysis advantage usage and the recycle method of dissolving in solvent .Among them,the hydrolysis advantage usage is divided into three kinds:the acid process hydrolysis;the alkaline process hydrolysis and pressurize hydrolysis.This paper uses NaOH the alkaline process hydrolysis, taking the acylic fiber waste fiber as the raw materials and using orthogonal cut-and -try method to design the paper .It integrated NaOH,temperature ,reaction time which influnent the fiber hydrolysis on the acylic fibers and determines the best condition of hydrolysis on the acrylic fibers and determines the best condition of hydrolysis reaction temperature 95-100℃,reaction time for 8 hours ,NaOH/PAN =0.65.Meanwhile ,the flocculation has been made ,and filter inorganic macromolecule PAC flocculation to react together with the PAM.and make it effect in waste water of the acrylic fibers.At the same time ,this paper introduces flocculation function principle of Law , utilize and improved the process conditions of waste water treatment of the acrylic fibers with the cut-and-try method and multi-fators experiment.It makes the CODcr reaches 78.9%,BOD reaches 86.4%,PH which should be equal 6.0 is right .so the paper offers an important theoretical foundation for practical application .At the same time ,the mechanism of the flocculation was analysised from different factors ,The influence extent of the dosage of the flocculation to flocculation speed and the effect of the breakaway of the sedimentation.The results shows that it’s good to the effect of the breakaway of the sedimentation and flocculation speed of the waste water of the acrylic fibers when the dosage of flocculation is 12mg/L.The dosage of the flocculation can’t be too high or low .If it’s too high ,the cost will increase .If it’s too low ,the effect of the waste water isn’t good.

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CLC: > Industrial Technology > Chemical Industry > The chemical fiber industry > General issues > Waste treatment and comprehensive utilization
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