A broad-spectrum composite ion flocculant for treating sewage and its preparation method
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A technology of composite ions and flocculants, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of many restrictive conditions and poor adaptability, and achieve the effects of low cost, fast settling speed and excellent coagulation performance
Inactive Publication Date: 2011-12-07
刘国清
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[0003] The purpose of the present invention is to solve the problems of conventional flocculant products with many application restrictions and poor adaptability, and provide a high-efficiency bro
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[0027] Example 1. The weight percentages of each component are: black liquor resin: 20%, NaOH: 20%, non-ionic polyacrylamide with a molecular weight of 7 million: 5%, aluminum sulfate: 25%, and polyferrous chloride: 30% .
Example Embodiment
[0028] Example 2. The weight percentages of the components are: black liquor resin: 25%, NaOH: 5%, non-ionic polyacrylamide with a molecular weight of 10 million: 15%, aluminum sulfate: 25%, and polyferrous chloride: 30% .
Example Embodiment
[0029] Example 3. The weight percentages of each component are: black liquor resin: 30%, NaOH: 5%, non-ionic polyacrylamide with a molecular weight of 12 million: 10%, aluminum sulfate: 30%, and polyferrous chloride: 25% .
[0030] The preparation steps of Examples 1-3 are:
[0031] 1. Add quantitative NaOH and water to the electric heating reactor, heat to 60℃, and stir at constant temperature until all are dissolved;
[0032] 2. Add quantitative black liquor resin, heat to 80°C, stir at constant temperature until it is completely dissolved;
[0033] 3. Add quantitative non-ionic polyacrylamide, raise the temperature to 105°C, fully stir the reaction at a constant temperature until all is dissolved;
[0034] 4. Cool down to 80°C, add powdered aluminum sulfate, stir and react at constant temperature until it is completely dissolved;
[0035] 5. At a constant temperature of 80°C, add powdered polyferrous chloride, stir until it is fully dissolved, and then add the whole solution to the d...
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Abstract
The invention belongs to the field of sewage treatment, and relates to a broad-spectrum composite ion flocculant for treating sewage and a preparation method thereof. It is characterized in that the composition range of the flocculant is: 20-30% of black liquor resin, 5% of NaOH, 10-20% of polyacrylamide with non-ionic molecular weight of 7 to 12 million, 20-30% of polyferrous chloride, sulfuric acid Aluminum 20-25%. The preparation steps are to add NaOH, water, black liquor resin, non-ionic polyacrylamide, powdered aluminum sulfate, and powdered polyferrous chloride to the electric heating reactor in sequence, stir until completely dissolved, and then add the whole solution to the drying oven After drying in the box, crush and filter through a 40-mesh filter to obtain the finished flocculant. The product of the invention has the advantages of fast sedimentation speed, wide application, high treatment efficiency, good effluent quality and low cost. The processing cost of the product is less than half of the processing cost of traditional polyacrylamide.
Description
Technical field: [0001] The invention belongs to the field of sewage treatment, and relates to a broad-spectrum composite ion flocculant for treating sewage and a preparation method thereof. technical background: [0002] The traditional sewage treatment method is: only cationic polyacrylamide can be used to treat alkaline sewage (such as oilfield sewage, middle water in paper industry, etc.); only anionic polyacrylamide can be used to treat acidic sewage (such as pharmaceutical industry sewage, chemical fertilizer production industry sewage, etc.) Amide; only non-ionic polyacrylamide can be used to treat neutral sewage. This product is an upgrade based on the 8810868.8 patent of the first inventor. The original patented technology was appraised as a domestic leading technology by the Hebei Provincial Science and Technology Commission and the Hebei Provincial Environmental Protection Bureau in 1979, and obtained the Chinese invention patent in 1988; but With the development...
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