阅读说明：本技术 一种絮凝剂及其制备方法 (Flocculating agent and preparation method thereof ) 是由 曹鹏飞 于 2021-09-29 设计创作，主要内容包括：本发明涉及一种絮凝剂,其具体是一种絮凝剂及其制备方法。本发明的一种絮凝剂由以下重量份的原料组成：丙烯酰胺15-35份、偶氮化合物1-5份、助凝剂2-8份、水解剂2-6份、杀菌剂0.5-2份、去离子水100-200份；本发明中的助凝剂可以形成絮体的骨料,从而一定程度上提高了絮凝效率,杀菌剂采用十二烷基二甲基苄基氯化铵1227,1227是一种阳离子表面活性剂,属非氧化性杀菌剂,具有广谱、高效的杀菌灭藻能力,能有效地控制水中菌藻繁殖和粘泥生长,并具有良好的粘泥剥离作用和一定的分散、渗透作用,同时具有一定的去油、除臭能力和缓蚀作用。(The invention relates to a flocculant, in particular to a flocculant and a preparation method thereof. The invention relates to a flocculating agent which is prepared from the following raw materials in parts by weight: 15-35 parts of acrylamide, 1-5 parts of azo compound, 2-8 parts of coagulant aid, 2-6 parts of hydrolytic agent, 0.5-2 parts of bactericide and 100-200 parts of deionized water; the coagulant aid can form aggregate of floc, so that the flocculation efficiency is improved to a certain extent, the bactericide adopts dodecyl dimethyl benzyl ammonium chloride 1227, 1227 is a cationic surfactant, belongs to a non-oxidative bactericide, has broad-spectrum and high-efficiency sterilization and algae removal capabilities, can effectively control the reproduction of bacteria and algae and the growth of slime, has a good slime stripping effect and certain dispersion and permeation effects, and has certain oil removal, deodorization and corrosion inhibition effects.)

1. A flocculant, characterized in that: the composition comprises the following raw materials in parts by weight: 15-35 parts of acrylamide, 1-5 parts of azo compound, 2-8 parts of coagulant aid, 2-6 parts of hydrolytic agent, 0.5-2 parts of bactericide and 100-200 parts of deionized water.

2. A flocculant according to claim 1, characterized in that: the composition comprises the following raw materials in parts by weight: 20 parts of acrylamide, 3 parts of azo compound, 4 parts of coagulant aid, 3 parts of hydrolytic agent, 1 part of bactericide and 150 parts of deionized water.

3. A flocculant according to claim 1, characterized in that: the azo compound is one of azobisisobutyronitrile, azobisdimethylvaleronitrile, azobiscyanovaleric acid sodium or azo N-substituted amidinopropane hydrochloride.

4. A flocculant according to claim 1, characterized in that: the coagulant aid is one or more of lime, diatomite and fly ash.

5. A flocculant according to claim 1, characterized in that: the hydrolytic agent is one or any mixture of sodium hydroxide or sodium carbonate.

6. A flocculant according to claim 1, characterized in that: the bactericide is dodecyl dimethyl benzyl ammonium chloride 1227.

7. A method for preparing a flocculant, comprising: mixing monomer acrylamide into deionized water, adding an azo compound, feeding the mixture into a mixing and stirring tank, stirring at a high speed of 800-1200r/min for 5-15min, adding a coagulant aid, a hydrolytic agent and a bactericide, raising the temperature to 40-50 ℃, stirring at a medium speed of 300-500r/min for 30-50min, raising the temperature to 50-60 ℃, keeping the temperature for 1-2h, obtaining a flocculant colloid after polymerization, drying and crushing the colloid to a particle size of 50-800 microns to obtain the flocculant.

Technical Field

The invention relates to a flocculant, in particular to a flocculant and a preparation method thereof.

Background

The flocculant is added into the sewage treatment field to play a role in adsorption and precipitation, so that water and impurities are separated, the effects of accelerating flocculation and sedimentation are played, and the impurities in the water can quickly form flocculation groups and settle down, thereby separating the water from the impurities. The conventional flocculating agent in the market is generally a flocculating agent for copolymerizing acrylamide and acrylic acid, the dosage of the used initiating agent is too large in the preparation process, the molecular chain of the flocculating agent is short, the dosage is large, bacteria and algae breeding and slime growth in sewage are caused due to long-term accumulation in part of sewage, and the flocculating effect is poor and the efficiency is low when the conventional flocculating agent is used for treating the sewage.

Disclosure of Invention

The flocculant prepared by the invention has good flocculation effect, aggregates of flocs can be formed by adding the coagulant aid, so that the flocculation efficiency is improved to a certain extent, the bactericide adopts dodecyl dimethyl benzyl ammonium chloride 1227, 1227 is a cationic surfactant, belongs to a non-oxidative bactericide, has broad-spectrum and high-efficiency sterilization and algae removal capability, can effectively control the propagation of bacteria and algae in water and the growth of slime, and has good slime stripping effect and certain dispersion and permeation effect.

In order to achieve the purpose, the invention adopts the following technical scheme:

the flocculant is prepared from the following raw materials in parts by weight: 15-35 parts of acrylamide, 1-5 parts of azo compound, 2-8 parts of coagulant aid, 2-6 parts of hydrolytic agent, 0.5-2 parts of bactericide and 100-200 parts of deionized water.

Further, the flocculant is prepared from the following raw materials in parts by weight: 20 parts of acrylamide, 3 parts of azo compound, 4 parts of coagulant aid, 3 parts of hydrolytic agent, 1 part of bactericide and 150 parts of deionized water.

Further, the azo compound is one of azobisisobutyronitrile, azobisdimethylvaleronitrile, azobiscyanovaleric acid sodium or azo N-substituted amidinopropane hydrochloride.

Further, the coagulant aid is one or more of lime, diatomite and fly ash, and is used for adjusting the pH value of the sewage or forming aggregates of flocs.

Further, the hydrolytic agent is one of sodium hydroxide or sodium carbonate or any mixture thereof, and can be used for adjusting the pH value of the solution.

Further, the bactericide is dodecyl dimethyl benzyl ammonium chloride 1227.

A method of preparing a flocculant comprising: mixing monomer acrylamide into deionized water, adding an azo compound, feeding the mixture into a mixing and stirring tank, stirring at a high speed of 800-1200r/min for 5-15min, adding a coagulant aid, a hydrolytic agent and a bactericide, raising the temperature to 40-50 ℃, stirring at a medium speed of 300-500r/min for 30-50min, raising the temperature to 50-60 ℃, keeping the temperature for 1-2h, obtaining a flocculant colloid after polymerization, drying and crushing the colloid to a particle size of 50-800 microns to obtain the flocculant.

Compared with the prior art, the invention has the beneficial effects that: the flocculant of the invention is prepared into aqueous solution and added into wastewater to generate a compressed electrical layer, so that suspended particles in the wastewater lose stability, colloidal particles are mutually condensed to increase the particles to form a floccule, and the floccule is separated from a water phase under the action of gravity to precipitate after the volume of the floccule is gradually increased, thereby removing a large amount of suspended matters in the wastewater and achieving the effect of water treatment; in addition, the coagulant aid can form aggregate of floc, so that the flocculation efficiency is improved to a certain extent, the bactericide adopts dodecyl dimethyl benzyl ammonium chloride 1227, 1227 is a cationic surfactant, belongs to a non-oxidative bactericide, has broad-spectrum and high-efficiency sterilization and algae removal capabilities, can effectively control the propagation of bacteria and algae in water and the growth of slime, has good slime stripping effect and certain dispersion and permeation effects, and has certain oil removal, deodorization and corrosion inhibition effects.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

The flocculant is prepared from the following raw materials in parts by weight: 20 parts of acrylamide, 3 parts of azo compound, 4 parts of coagulant aid, 3 parts of hydrolytic agent, 1 part of bactericide and 150 parts of deionized water.

In example 1, the azo compound is azobisisobutyronitrile, the coagulant aid is a mixture of diatomaceous earth and fly ash, the hydrolysis agent is sodium hydroxide, and the bactericide is dodecyl dimethyl benzyl ammonium chloride 1227.

A method of preparing a flocculant comprising: mixing monomer acrylamide into deionized water, adding azo compound, feeding into a mixing and stirring tank, stirring at a high speed of 900r/min for 7min, adding coagulant aid, hydrolytic agent and bactericide, heating to 45 ℃, stirring at a medium speed of 300r/min for 45min, heating to 58 ℃, keeping for 1.5h, obtaining flocculant colloid after polymerization is completed, drying the colloid, and crushing to obtain 100 microns.

Example 2

The flocculant is prepared from the following raw materials in parts by weight: 15 parts of acrylamide, 2 parts of azo compound, 6 parts of coagulant aid, 2 parts of hydrolytic agent, 0.5 part of bactericide and 160 parts of deionized water.

In example 2, the azo compound is sodium azobiscyanovalerate, the coagulant aid is diatomaceous earth, the hydrolyzing agent is sodium carbonate, and the bactericide is dodecyl dimethyl benzyl ammonium chloride 1227.

A method of preparing a flocculant comprising: mixing monomer acrylamide into deionized water, adding azo compound, feeding into a mixing and stirring tank, stirring at a high speed of 1000r/min for 12min, adding coagulant aid, hydrolytic agent and bactericide, heating to 40 ℃, stirring at a medium speed of 350r/min for 35min, heating to 50 ℃, keeping for 1.5h, obtaining flocculant colloid after polymerization is completed, drying the colloid, and crushing to obtain the flocculant with the particle size of 200 microns.

Example 3

The flocculant is prepared from the following raw materials in parts by weight: 30 parts of acrylamide, 5 parts of azo compound, 5 parts of coagulant aid, 3 parts of hydrolytic agent, 2 parts of bactericide and 180 parts of deionized water.

In example 3, the azo compound is azo N-substituted amidinopropane hydrochloride, the coagulant aid is the mixture of diatomite and fly ash in equal ratio, the hydrolytic agent is the mixture of sodium hydroxide or sodium carbonate in equal ratio, and the bactericide is dodecyl dimethyl benzyl ammonium chloride 1227.

A method of preparing a flocculant comprising: mixing monomer acrylamide into deionized water, adding azo compound, feeding into a mixing and stirring tank, stirring at a high speed of 1200r/min for 6min, adding coagulant aid, hydrolytic agent and bactericide, heating to 50 ℃, stirring at a medium speed of 300r/min for 40min, heating to 60 ℃, keeping for 1h, obtaining flocculant colloid after polymerization, drying and crushing the colloid to a particle size of 300 microns to obtain the flocculant.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.