Inorganic-organic composite flocculating agent and preparation method thereof

A composite flocculant and flocculant technology, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problem of positive charge density decrease, and achieve the effects of fast settling speed, low energy consumption and mild reaction conditions

Inactive Publication Date: 2010-05-19
SHANGHAI WSHINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Ordinary inorganic-polyacrylamide composite flocculant, although it can enhance the flocculation effect, improve stability, and prolong the gelation period, but it reduces the positive charge density

Method used

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  • Inorganic-organic composite flocculating agent and preparation method thereof
  • Inorganic-organic composite flocculating agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add additives according to the proportioning (ammonium sulfate 35%, sodium sulfate 40%, sodium silicate 15%, potassium alum 10%) and add stirring tank I, under normal temperature and pressure, stir 15~25 minutes with the speed of 25 revs / min. Add polyacrylamide and 4A zeolite to the stirring tank II, and then add the stirred additive. The weight ratio of polyacrylamide, 4A zeolite and additive is 90%: 5%: 5%. Stir at the highest speed for 15-25 minutes and discharge. The prepared inorganic-organic composite flocculant is applied to a sewage treatment plant, and the moisture content of the incoming sludge is 98.2%. Add 40ppm of the inorganic-organic composite flocculant according to the present invention, and pass through the belt sludge dehydrator after mixing evenly. After processing, the moisture content of the mud was 84%.

Embodiment 2

[0033] Add additives according to the proportion (50% ammonium sulfate, 30% sodium sulfate, 10% sodium silicate, 10% potassium alum) into the stirring tank I, and stir for 15 to 25 minutes at a speed of 25 rpm under normal temperature and pressure. Add polyacrylamide and 4A zeolite to the stirring tank II, and then add the stirred additive. The weight ratio of polyacrylamide, 4A zeolite and additive is 90%: 5%: 5%. Stir at the highest speed for 15-25 minutes and discharge. The prepared inorganic-organic composite flocculant is applied to a certain pig farm sewage treatment, the dosage is 0.3mg / L, the decolorization rate is 76.5%, the COD (chemical oxygen demand) removal rate is 82%, and the SS (suspended solid) The removal rate is over 95%.

Embodiment 3

[0035] Add additives according to the proportion (40% ammonium sulfate, 45% sodium sulfate, 10% sodium silicate, 5% potassium alum) into the stirring tank I, and stir for 15 to 25 minutes at a speed of 25 rpm under normal temperature and pressure. Add polyacrylamide and 4A zeolite to the stirring tank II, and then add the stirred additive. The weight ratio of polyacrylamide, 4A zeolite and additive is 90%: 5%: 5%. Stir at the highest speed for 15-25 minutes and discharge. The prepared inorganic-organic composite flocculant and aluminum sulfate compound (inorganic-organic composite flocculant 0.5mg / L, aluminum sulfate 100mg / L) is used for enhanced flocculation of influent water in a sewage treatment plant, which can make COD Cr 83.4% reduction, BOD5 reduction 75.8%, TP (total phosphorus) reduction 86.2%, SS reduction 97.7%.

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PUM

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Abstract

The invention provides an inorganic-organic composite flocculating agent, which comprises the following components in percentage by weight: 90 percent of polyacrylamide, and 5 percent of 4A-zeolite and 5 percent of additive. The additive comprises the following components in percentage by weight: 30 to 50 percent of ammonium sulfate, 30 to 50 percent of sodium sulfate, 5 to 15 percent of sodium silicate, and 5 to 15 percent of potassium alum. The preparation method comprises the following steps: firstly, stirring and mixing the additive; then, mixing the additive with the polyacrylamide (PAM) and the 4A-zeolite to obtain the composite flocculating agent. The flocculating agent has simple production technology, high production capacity, mild reaction conditions, low energy consumption, no three wastes emission; and the composite flocculating agent has quick growth, wide pH application range, quick sedimentation velocity and high COD removal rate.

Description

technical field [0001] The invention relates to a chemical preparation and a preparation method thereof, in particular to an inorganic-organic composite flocculant and a preparation method thereof. Background technique [0002] At present, the most researched inorganic-organic composite flocculants are polyaluminum, iron-based inorganic polymers and polyacrylamide composite flocculants. The compounding conditions such as the ratio of inorganic components to organic components, water treatment conditions such as pH value, temperature , Stirring speed and stirring time have been carefully studied. [0003] Chinese Patent No. CN1393410A discloses an organic-inorganic composite flocculant and its production method. This flocculant includes a polymer of dicyandiamide and formaldehyde, polyaluminum sulfide and / or calcium polysulfide aluminum . Its production methods include: hydrolysis reaction; polymerization reaction and polycondensation reaction. However, the toxic substance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 谭辉铁
Owner SHANGHAI WSHINE CHEM
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