A broad-spectrum composite ion flocculant for treating sewage and its preparation method

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...

Examples

Embodiment 1

[0027] Example 1, the weight percentage of each component is: black liquor resin: 20%, NaOH: 20%, nonionic polyacrylamide with a molecular weight of 7 million: 5%, aluminum sulfate: 25%, polyferrous chloride: 30% .

Embodiment 2

[0028] Example 2, the weight percentage of each component is: black liquor resin: 25%, NaOH: 5%, nonionic polyacrylamide with a molecular weight of 10 million: 15%, aluminum sulfate: 25%, polyferrous chloride: 30% .

Embodiment 3

[0029] Example 3, the weight percentage of each component is: black liquor resin: 30%, NaOH: 5%, nonionic polyacrylamide with a molecular weight of 12 million: 10%, aluminum sulfate: 30%, polyferrous chloride: 25% .

[0030] The preparation steps of embodiment 1-3 are:

[0031] 1. Add quantitative NaOH and water to the electric heating reactor, heat to 60°C, and stir at constant temperature until completely dissolved;

[0032] 2. Add quantitative black liquor resin, heat to 80°C, and stir at constant temperature until completely dissolved;

[0033] 3. Then add quantitative non-ionic polyacrylamide, raise the temperature to 105°C, stir and react at a constant temperature until it completely dissolves;

[0034] 4. Cool down to 80°C, add powdered aluminum sulfate, stir at constant temperature until fully dissolved;

[0035] 5. Keep the temperature at 80°C, add powdered polyferrous chloride, stir until completely dissolved, then add the whole solution into the drying box;

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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...

Examples

Embodiment 1

[0027] Example 1, the weight percentage of each component is: black liquor resin: 20%, NaOH: 20%, nonionic polyacrylamide with a molecular weight of 7 million: 5%, aluminum sulfate: 25%, polyferrous chloride: 30% .

Embodiment 2

[0028] Example 2, the weight percentage of each component is: black liquor resin: 25%, NaOH: 5%, nonionic polyacrylamide with a molecular weight of 10 million: 15%, aluminum sulfate: 25%, polyferrous chloride: 30% .

Embodiment 3

[0029] Example 3, the weight percentage of each component is: black liquor resin: 30%, NaOH: 5%, nonionic polyacrylamide with a molecular weight of 12 million: 10%, aluminum sulfate: 30%, polyferrous chloride: 25% .

[0030] The preparation steps of embodiment 1-3 are:

[0031] 1. Add quantitative NaOH and water to the electric heating reactor, heat to 60°C, and stir at constant temperature until completely dissolved;

[0032] 2. Add quantitative black liquor resin, heat to 80°C, and stir at constant temperature until completely dissolved;

[0033] 3. Then add quantitative non-ionic polyacrylamide, raise the temperature to 105°C, stir and react at a constant temperature until it completely dissolves;

[0034] 4. Cool down to 80°C, add powdered aluminum sulfate, stir at constant temperature until fully dissolved;

[0035] 5. Keep the temperature at 80°C, add powdered polyferrous chloride, stir until completely dissolved, then add the whole solution into the drying box;

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