A kind of preparation method of ecological type high-efficiency composite flocculant

Abstract

The invention relates to a preparation method for an ecological high-efficient complex flocculating agent. By the preparation method, the complex flocculating agent consisting of sodium carboxymethyl cellulose and inorganic aluminum salt is prepared by using the inorganic aluminum salt as a matrix basic material. The method comprises the following steps of: 1) mixing the sodium carboxymethyl cellulose with water and stirring to obtain transparent sticky sodium carboxymethyl cellulose solution; 2) mixing the inorganic aluminum salt with water to obtain polymeric aluminum salt solution; and 3) mixing the sodium carboxymethyl cellulose solution with the polymeric aluminum salt solution, stirring, and performing a complex reaction to obtain the light yellow emulsible complex flocculating agent. The preparation method has the advantages of: good flocculation effect, no secondary pollution and high ecological safety; the preparation method is simple, has mild reaction conditions, and is easy to extend to realize industrialized production; the preparation method is high in economic performance and low in cost, has wide synthetic raw material sources and meets the requirements on recycling economy and pollution-free production; and the preparation method has a wide applicable range, is suitable for various kinds of industrial wastewater and life wastewater, and even water supply industrial water, and the using range can be further extended by regulating formula proportions.

Description

technical field

[0001] The invention relates to the fields of sewage treatment and water supply, in particular to a preparation method of an ecological composite high-efficiency composite flocculant used for industrial waste water or domestic sewage treatment and drinking water purification. Background technique

[0002] At present, flocculants widely used in sewage treatment can be divided into inorganic flocculants, organic flocculants, microbial flocculants and composite flocculants. Among them, inorganic flocculants are cheap and have good flocculation effects, represented by aluminum salts, iron salts and their polymers; the density and strength of alum flowers formed by iron salts are relatively large, and the water purification effect is remarkable, and the effect is little affected by water temperature. It has a wide range of applications and has a good treatment effect on some raw water. However, the iron salt flocculant is not only strongly corrosive, but also requ...

Examples

Embodiment 1

[0030] A preparation method of an ecological composite high-efficiency composite flocculant, the steps are as follows:

[0031] 1) Take 1 gram of sodium carboxymethyl cellulose and add 25 mL of water to fully stir and mix to form a sodium carboxymethyl cellulose solution;

[0032] 2) Take 5 grams of polyaluminum chloride, containing 0.667 grams of aluminum, and add 100 mL of water to form a polyaluminum salt solution;

[0033] 3) Slowly add the polyaluminum salt solution to the sodium carboxymethyl cellulose solution under the condition of magnetic stirring at 300 rpm and 70°C, stir for 30 minutes to obtain a mixed solution, and then put the mixed solution into a 40°C water bath Under the condition of composite reaction for 3 hours, a light yellow emulsion was obtained, which is the product flocculant A.

Embodiment 2

[0035] A preparation method of an ecological composite high-efficiency composite flocculant, the steps are as follows:

[0036] 1) Take 1 gram of sodium carboxymethyl cellulose and add 25 mL of water to fully stir and mix to form a sodium carboxymethyl cellulose solution;

[0037] 2) Take 5 grams of polyaluminum chloride, containing 0.667 grams of aluminum, and add 100 mL of water to form a polyaluminum salt solution;

[0038]3) Under the conditions of magnetic stirring at 300 rpm and heating at 80°C, slowly add the sodium carboxymethyl cellulose solution to the polyaluminum salt solution, stir for 15 minutes to obtain a mixed solution, and then place the mixed solution at 50°C The complex reaction was carried out for 5 hours in a water bath to obtain a light yellow emulsion, which is the product flocculant B.

Embodiment 3

[0040] A preparation method of an ecological composite high-efficiency composite flocculant, the steps are as follows:

[0041] 1) Take 4 grams of sodium carboxymethyl cellulose and add 100 mL of water to fully stir and mix to form a sodium carboxymethyl cellulose solution;

[0042] 2) Take 2 grams of polyaluminum chloride, containing 0.267 grams of aluminum, and add 40 mL of water to form a polyaluminum salt solution;

[0043] 3) Under the conditions of magnetic stirring at 200 rpm and heating at 70°C, slowly add the sodium carboxymethyl cellulose solution to the polyaluminum salt solution, and stir for 15 minutes to obtain a mixed solution; then place the mixed solution at 50°C The composite reaction was carried out for 3 hours under the condition of water bath, and a light yellow emulsion was obtained, which is the product flocculant C.

technical field

[0001] The invention relates to the fields of sewage treatment and water supply, in particular to a preparation method of an ecological composite high-efficiency composite flocculant used for industrial waste water or domestic sewage treatment and drinking water purification. Background technique

[0002] At present, flocculants widely used in sewage treatment can be divided into inorganic flocculants, organic flocculants, microbial flocculants and composite flocculants. Among them, inorganic flocculants are cheap and have good flocculation effects, represented by aluminum salts, iron salts and their polymers; the density and strength of alum flowers formed by iron salts are relatively large, and the water purification effect is remarkable, and the effect is little affected by water temperature. It has a wide range of applications and has a good treatment effect on some raw water. However, the iron salt flocculant is not only strongly corrosive, but also requ...

Examples

Embodiment 1

[0030] A preparation method of an ecological composite high-efficiency composite flocculant, the steps are as follows:

[0031] 1) Take 1 gram of sodium carboxymethyl cellulose and add 25 mL of water to fully stir and mix to form a sodium carboxymethyl cellulose solution;

[0032] 2) Take 5 grams of polyaluminum chloride, containing 0.667 grams of aluminum, and add 100 mL of water to form a polyaluminum salt solution;

[0033] 3) Slowly add the polyaluminum salt solution to the sodium carboxymethyl cellulose solution under the condition of magnetic stirring at 300 rpm and 70°C, stir for 30 minutes to obtain a mixed solution, and then put the mixed solution into a 40°C water bath Under the condition of composite reaction for 3 hours, a light yellow emulsion was obtained, which is the product flocculant A.

Embodiment 2

[0035] A preparation method of an ecological composite high-efficiency composite flocculant, the steps are as follows:

[0036] 1) Take 1 gram of sodium carboxymethyl cellulose and add 25 mL of water to fully stir and mix to form a sodium carboxymethyl cellulose solution;

[0037] 2) Take 5 grams of polyaluminum chloride, containing 0.667 grams of aluminum, and add 100 mL of water to form a polyaluminum salt solution;

[0038]3) Under the conditions of magnetic stirring at 300 rpm and heating at 80°C, slowly add the sodium carboxymethyl cellulose solution to the polyaluminum salt solution, stir for 15 minutes to obtain a mixed solution, and then place the mixed solution at 50°C The complex reaction was carried out for 5 hours in a water bath to obtain a light yellow emulsion, which is the product flocculant B.

Embodiment 3

[0040] A preparation method of an ecological composite high-efficiency composite flocculant, the steps are as follows:

[0041] 1) Take 4 grams of sodium carboxymethyl cellulose and add 100 mL of water to fully stir and mix to form a sodium carboxymethyl cellulose solution;

[0042] 2) Take 2 grams of polyaluminum chloride, containing 0.267 grams of aluminum, and add 40 mL of water to form a polyaluminum salt solution;

[0043] 3) Under the conditions of magnetic stirring at 200 rpm and heating at 70°C, slowly add the sodium carboxymethyl cellulose solution to the polyaluminum salt solution, and stir for 15 minutes to obtain a mixed solution; then place the mixed solution at 50°C The composite reaction was carried out for 3 hours under the condition of water bath, and a light yellow emulsion was obtained, which is the product flocculant C.

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