CN102701348A

CN102701348A - Preparation method for environment-friendly composite flocculant

Info

Publication number: CN102701348A
Application number: CN201210192291XA
Authority: CN
Inventors: 徐梁冰
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-06-12
Filing date: 2012-06-12
Publication date: 2012-10-03

Abstract

The invention relates to a preparation method for an environment-friendly composite flocculant. The environment-friendly composite flocculant is prepared by preprocessing, cationic modification and the like by taking epichlorohydrin, triethylamine, starch, sodium carboxymethylcellulose and water as raw materials. The flocculant prepared by the preparation method has the advantages as follows: the flocculant has the characteristics of green and environmental protection, low cost, small addition amount, quick flocculation speed and little sludge; the removal rate of the indexes of the treated wastewater is high, so that the treated wastewater can be discharged or recycled with a standard level; and the preparation process is simple, and the prepared flocculant is easy and convenient to use.

Description

A kind of preparation method of environment-friendly type composite flocculation agent

Technical field

The present invention relates to the preparation method of composite flocculant, be a kind of water treatment specifically with environmental protection inorganic cheaply-preparation method of organic compound flocculation agent.

Background technology

In recent years, along with the fast development of China's national economy, the imbalance between supply and demand of water becomes increasingly conspicuous.Water shortage, water pollute life to the development of China's national economy and industrial and agricultural production and people constituted serious prestige rib.Waste water treating and reutilizing is the main path that solves the water crisis.Flocculation has a wide range of applications in water technology as a kind of important method of wastewater treatment.In flocculation sedimentation, the selection of flocculation agent is the most key, and the kind of flocculation agent, character, performance are the key factors that influences flocculation treatment effect and cost.In flocculation agent, there are shortcomings such as dosage is big, moisture percentage in sewage sludge height in inorganic flocculating agent, and its application is restricted.In the organic polymer coargulator,, and exist a certain amount of residual monomer because synthetic organic polymer flocculation agent cost of manufacture is high; Brought toxicity inevitably, Vestolen PP 7052 phthalein amine (Polyscrylamide) is called for short PAM, and molecular formula is: [CH2-CH (CONH2)] n; Be the wire high molecular polymer, molecular weight is between 400-2000 ten thousand, and the solid phase prod outward appearance is for white or have a little yellow powder; Liquid state is colourless thickness colloidal, and is soluble in water, is prone to when temperature surpasses 120 ℃ decompose.Bibliographical information is arranged, and the foreign study person finds that the degraded product of SEPIGEL 305 can be used as the nutritive substance of bacterium vital movement, and nutritive substance can promote the degraded of SEPIGEL 305 again conversely.Therefore become application one of flocculation agent widely the most, yet the monomer acrylic amide of SEPIGEL 305 is a kind of carcinogenic substance, how present many countries have reduced its application.The preparation of high efficiency, low cost flocculation agent becomes one of focus that investigators pay close attention to for this reason.

A large amount of practices show; Two or more flocculation agent is used through composite or a kind of composite flocculation agent of reaction formation; Then can overcome the deficiency of using single flocculation agent, realize having complementary advantages, and consumption be few, cost is low, efficient is high; Therefore, composite flocculation agent is the research emphasis and the developing direction of flocculation agent from now on.

Summary of the invention

The invention provides the technology of preparing of a kind of water treatment with inorganic-organic compound flocculation agent of high efficiency, low cost.

For realizing that the concrete technical scheme that the object of the invention adopted is:

A kind of preparation method of environment-friendly type composite flocculation agent is characterized in that, may further comprise the steps:

1) 20-30ml epoxy chloropropane and the excessive excessive flask of putting into of triethylamine are inserted the ice bath pot, airtight stirring reaction 3-4 h, ice bath leaves standstill more than 5 h, gets upper strata liquid after the layering;

2) starch 50-55g is added in the 150-180mL zero(ppm) water, in 40-50 ℃ of warm water, leaves standstill behind water-bath 2-2.5h and add a certain amount of absolute ethyl alcohol and stirring, behind the suction filtration with the filter residue dewatered drying;

3) take by weighing step 2) prepared product 20g; Add the NaCl of 50-60ml 0.1%, add the 20-25g Xylo-Mucine simultaneously, stirring and dissolving; Stir alkalization for some time with certain density NaOH solution in constant temperature water bath again, when bath temperature reaches 70 ℃, add 0.005-0.009g H ₂O ₂-FeSO ₄Initiator activation 60 S add the upper strata liquid that excessive step 1) prepares again, water bath with thermostatic control reaction 4-5h;

4) reactant cooling back suction filtration is used deionized water rinsing then, and the gains oven dry is preserved, and promptly gets flocculant solution.

The present invention has selected starch and organic constituent proportioning and corresponding preparation parameter through a large amount of experiments, prepares a kind of flocculation agent through pre-treatment, cation-modified etc., and selects sewage, molasses alcohol waste liquid that it has been carried out applied research.

Beneficial effect of the present invention is,

1) flocculating effect is good, and sedimentation speed is fast; The clearance of the waste water each item index after the processing is high, can qualified discharge or reuse;

2) reagent dosage is few, and the addition of composite flocculation agent is 12-16mg/L, practices thrift processing cost;

3) process for producing is simple, and product is easy to use.

Embodiment

Below in conjunction with specific embodiment technical scheme of the present invention is described.

Embodiment 1:

1) 20ml epoxy chloropropane and the excessive excessive flask of putting into of triethylamine are inserted the ice bath pot, airtight stirring reaction 4 h, ice bath leaves standstill more than 5 h, gets upper strata liquid after the layering;

2) tapioca(flour) 55g is added in the 160mL zero(ppm) water, in 40 ℃ of warm water, leaves standstill behind water-bath 2 h and add a certain amount of absolute ethyl alcohol and stirring, behind the suction filtration with the filter residue dewatered drying;

3) take by weighing step 2) prepared product 20g; Add the NaCl of 60ml 0.1%, add the 20g Xylo-Mucine simultaneously, stirring and dissolving; Stir alkalization for some time with certain density NaOH solution in constant temperature water bath again, when bath temperature reaches 70 ℃, add 0.005g H ₂O ₂-FeSO ₄Initiator activation 60 S add the upper strata liquid that excessive step 1) prepares again, water bath with thermostatic control reaction 4h;

Flocculant solution with this embodiment obtains is used for electroplating wastewater processing, adds according to the amount of 12mg/L, can make electroplating wastewater COD, turbidity, SS reduce by 73%, 90%, 71% respectively.

Embodiment 2:

1) 25ml epoxy chloropropane and the excessive excessive flask of putting into of triethylamine are inserted the ice bath pot, airtight stirring reaction 3.5 h, ice bath leaves standstill more than 5 h, gets upper strata liquid after the layering;

2) ground melon starch 52g is added in the 160mL zero(ppm) water, in 45 ℃ of warm water, leaves standstill behind the water-bath 2.2h and add a certain amount of absolute ethyl alcohol and stirring, behind the suction filtration with the filter residue dewatered drying;

3) take by weighing step 2) prepared product 20g; Add the NaCl of 55ml 0.1%, add the 23g Xylo-Mucine simultaneously, stirring and dissolving; Stir alkalization for some time with certain density NaOH solution in constant temperature water bath again, when bath temperature reaches 70 ℃, add 0.007g H ₂O ₂-FeSO ₄Initiator activation 60 S add the upper strata liquid that excessive step 1) prepares again, water bath with thermostatic control reaction 4-5h;

Flocculant solution with this embodiment obtains is used for electroplating wastewater processing, adds according to the amount of 12mg/L, can make electroplating wastewater COD, turbidity, SS reduce by 74%, 91%, 72% respectively.

Embodiment 3:

1) 30ml epoxy chloropropane and the excessive excessive flask of putting into of triethylamine are inserted the ice bath pot, airtight stirring reaction 3-4 h, ice bath leaves standstill more than 5 h, gets upper strata liquid after the layering;

2) W-Gum 50g is added in the 180mL zero(ppm) water, in 50 ℃ of warm water, leaves standstill behind the water-bath 2.5h and add a certain amount of absolute ethyl alcohol and stirring, behind the suction filtration with the filter residue dewatered drying;

3) take by weighing step 2) prepared product 20g; Add the NaCl of 50ml 0.1%, add the 25g Xylo-Mucine simultaneously, stirring and dissolving; Stir alkalization for some time with certain density NaOH solution in constant temperature water bath again, when bath temperature reaches 70 ℃, add 0.009g H ₂O ₂-FeSO ₄Initiator activation 60 S add the upper strata liquid that excessive step 1) prepares again, water bath with thermostatic control reaction 5h;

Flocculant solution with this embodiment obtains is used for electroplating wastewater processing, adds according to the amount of 12mg/L, can make electroplating wastewater COD, turbidity, SS reduce by 73%, 92%, 73% respectively.

Need to prove that at last the above is merely preferred embodiment of the present invention, rather than to the qualification of technical scheme of the present invention, anyly be equal to replacement or corresponding improvement, still within protection scope of the present invention what technical characterictic of the present invention was done.

Claims

1. the preparation method of an environment-friendly type composite flocculation agent is characterized in that, may further comprise the steps:

2. the preparation method of a kind of environment-friendly type composite flocculation agent according to claim 1 is characterized in that described starch is Tapioca Starch, Semen Maydis powder, tapioca flour or wheat-flour.