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Environment-friendly sewage treatment flocculant and preparation method thereof

An environmentally friendly sewage and flocculant technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of increasing sludge treatment load, destroying the biological chain of water body, endangering human health, etc., achieving fast sedimentation speed and removal rate of suspended solids High, low-cost effect

Inactive Publication Date: 2020-07-03
宋庆红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the flocculants used in the water treatment industry are commonly used as inorganic flocculants represented by iron-based, aluminum-based and their polymers. They are widely used due to their good flocculation effect and low cost during their use. Aluminum-based flocculants Aluminum ions in the medium can easily cause Alzheimer's disease, and the iron ions in the iron-based flocculants have a corrosive effect on metals, which can easily cause color in the treated water and increase the load of sludge treatment
Organic flocculant is another kind of flocculant in the prior art. This kind of flocculant has the advantages of small dosage, fast flocculation speed and good flocculation effect. Large, destroying the biological chain of the water body, thereby affecting human health
[0004] The Chinese patent document with the application number 01108579.7 discloses an organic-inorganic composite flocculant, including a polymer of dicyandiamide and formaldehyde, polyaluminum sulfide and / or calcium polysulfide aluminum, prepared by the following method: First, hydrolyze the aluminum salt, then add calcium salt to the hydrolyzed product for polymerization, then add dicyandiamine and formaldehyde for polycondensation to obtain the inorganic-organic composite flocculant, which has low chemical consumption , good wastewater treatment effect, etc., but the flocculant uses formaldehyde as raw material, the production process is prone to environmental pollution, and the obtained flocculant also contains a large amount of free formaldehyde, which is harmful to human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of preparation method of environment-friendly sewage treatment flocculant is characterized in that, comprises the steps:

[0035]Step S1, aluminum dihydroxyaminoacetate modified epoxy-terminated hyperbranched poly(amine-ester): aluminum dihydroxyaminoacetate, epoxy-terminated hyperbranched poly(amine-ester), and sodium hydroxide are added to dimethyl In sulfoxide, stirred and reacted at 80°C for 6 hours, then precipitated in water, filtered, and dried in a vacuum oven at 85°C to constant weight to obtain dihydroxyaminoacetate aluminum modified epoxy-terminated hyperbranched polymer (amine-ester); the mass ratio of the aluminum dihydroxyaminoacetate, epoxy-terminated hyperbranched poly(amine-ester), sodium hydroxide, and dimethyl sulfoxide is 0.5:1:0.5:10;

[0036] Step S2, ionization modification: adding the dihydroxyaminoacetate aluminum modified epoxy-terminated hyperbranched poly(amine-ester), chloroacetamide-N-methanol and chlorolactic acid prepared in step S...

Embodiment 2

[0042] A kind of preparation method of environment-friendly sewage treatment flocculant is characterized in that, comprises the steps:

[0043] Step S1, aluminum dihydroxyaminoacetate modified epoxy-terminated hyperbranched poly(amine-ester): adding dihydroxyaminoacetate aluminum, epoxy-terminated hyperbranched poly(amine-ester), and potassium hydroxide to N, In N-dimethylformamide, stirred and reacted at 83°C for 6.5 hours, then precipitated in water, filtered, and dried in a vacuum oven at 87°C to constant weight to obtain dihydroxyaminoacetate aluminum modified epoxy Terminal hyperbranched poly(amine-ester); the mass ratio of the dihydroxyaminoacetate aluminum, epoxy terminal hyperbranched poly(amine-ester), potassium hydroxide, N,N-dimethylformamide is 0.6 :1:0.6:12;

[0044] Step S2, ionization modification: adding the dihydroxyaminoacetate aluminum modified epoxy-terminated hyperbranched poly(amine-ester), chloroacetamide-N-methanol and chlorolactic acid prepared in ste...

Embodiment 3

[0050] A kind of preparation method of environment-friendly sewage treatment flocculant is characterized in that, comprises the steps:

[0051] Step S1, aluminum dihydroxyaminoacetate modified epoxy-terminated hyperbranched poly(amine-ester): adding dihydroxyaminoacetate aluminum, epoxy-terminated hyperbranched poly(amine-ester), and potassium hydroxide to N, In N-dimethylformamide, stirred and reacted at 85°C for 7 hours, then precipitated in water, filtered, and dried in a vacuum oven at 90°C to constant weight to obtain dihydroxyaminoacetate aluminum modified epoxy Terminal hyperbranched poly(amine-ester); the mass ratio of the dihydroxyaminoacetate aluminum, epoxy terminal hyperbranched poly(amine-ester), potassium hydroxide, N,N-dimethylformamide is 0.6 :1:0.6:12;

[0052] Step S2, ionization modification: adding the dihydroxyaminoacetate aluminum modified epoxy-terminated hyperbranched poly(amine-ester), chloroacetamide-N-methanol and chlorolactic acid prepared in step ...

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PUM

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Abstract

The invention discloses an environment-friendly sewage treatment flocculant and a preparation method thereof. The preparation method is characterized by comprising the following steps: S1, modifying epoxy-terminated hyperbranched poly(amine-ester) with aluminum dihydroxyaminoacetate, S2, carrying out ionization modification, S3, modifying the surface of the nano kaolin, and S4, carrying out composite molding on the flocculant. The invention also discloses the environment-friendly sewage treatment flocculant and the preparation method thereof. The environment-friendly sewage treatment flocculant disclosed by the invention is good in flocculation effect, high in efficiency, small in dosage, good in performance stability in storage and transportation, safe and environment-friendly to use, compact in flocculate, high in precipitation speed and high in suspended matter removal rate.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an environmentally friendly sewage treatment flocculant and a preparation method thereof. Background technique [0002] The rapid development of modern industry has also caused pollution to the environment. As one of the common environmental pollution problems, water pollution has attracted widespread attention because of its large amount, difficult treatment, and serious harm. In particular, the pollution of water by heavy metals poses a serious threat to human health and life, and greatly damages the development of agriculture, forestry, animal husbandry, fishery and other industries. It can be seen that effective treatment of sewage has become a difficult problem that sewage discharge enterprises have to face. [0003] The flocculation treatment of sewage is one of the key links in sewage treatment, which can remove turbidity and pollution and reduce the pollution l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/56
CPCC02F1/56
Inventor 宋庆红
Owner 宋庆红
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