A preparation method of flocculant for purifying seawater and the prepared flocculant

A flocculant and seawater technology, applied in seawater treatment, flocculation/sedimentation water/sewage treatment, polluted waterways/lakes/ponds/rivers treatment, etc., can solve the unsatisfactory results of seawater purification, water secondary Pollution, large dosage and other problems, to achieve the effect of avoiding secondary pollution, high purification efficiency and low cost

Inactive Publication Date: 2018-03-27
NORTH CHINA SEA ENVIRONMENTAL MONITORING CENT OF STATE OCEANIC ADMINISTATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the existing flocculants are used to purify seawater, not only the dosage is large, but also more sediments are produced, and it is easy to cause secondary pollution to the water body, and the results of purifying seawater are often not satisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method of flocculant for purifying seawater, comprising the following steps:

[0033] (1) Crush the starch until the particle size is 200 mesh, 300 mesh and 350 mesh, and mix the starches with different particle sizes evenly in proportion to obtain the mixed starch; the mass ratio of the starch with different particle sizes in the mixed starch is as follows, the particle size 200-mesh starch: 300-mesh starch: 350-mesh starch equals 1:2:3;

[0034] (2) Ferric trichloride is pulverized to a particle size of 300 mesh and 400 mesh, and ferric chloride of different particle sizes is mixed evenly in proportion to obtain mixed ferric chloride; different particle sizes in mixed ferric chloride The ratio of ferric chloride quality is as follows, particle size is 300 mesh ferric chloride: particle size is 400 mesh ferric chloride is equal to 1.5:1;

[0035] (3) Bentonite is pulverized to a particle size of 200 mesh and 300 mesh, and bentonite with different particl...

Embodiment 2

[0043] A preparation method of flocculant for purifying seawater, comprising the following steps:

[0044] (1) Crush the starch until the particle size is 200 mesh, 300 mesh and 350 mesh, and mix the starches with different particle sizes evenly in proportion to obtain the mixed starch; the mass ratio of the starch with different particle sizes in the mixed starch is as follows, the particle size 200-mesh starch: 300-mesh starch: 350-mesh starch equals 1:2.5:3;

[0045] (2) Ferric trichloride is pulverized to a particle size of 300 mesh and 400 mesh, and ferric chloride of different particle sizes is mixed evenly in proportion to obtain mixed ferric chloride; different particle sizes in mixed ferric chloride The ratio of ferric chloride quality is as follows, particle size is 300 mesh ferric chloride: particle size is 400 mesh ferric chloride is equal to 1.5:1;

[0046] (3) Bentonite is pulverized to a particle size of 200 mesh and 300 mesh, and bentonite with different parti...

Embodiment 3

[0054] A preparation method of flocculant for purifying seawater, comprising the following steps:

[0055] (1) Crush the starch until the particle size is 200 mesh, 300 mesh and 350 mesh, and mix the starches with different particle sizes evenly in proportion to obtain the mixed starch; the mass ratio of the starch with different particle sizes in the mixed starch is as follows, the particle size 200-mesh starch: 300-mesh starch: 350-mesh starch equals 1:3:2.5;

[0056] (2) Ferric trichloride is pulverized to a particle size of 300 mesh and 400 mesh, and ferric chloride of different particle sizes is mixed evenly in proportion to obtain mixed ferric chloride; different particle sizes in mixed ferric chloride The ratio of the ferric chloride quality is as follows, the particle size is 300 mesh ferric chloride: the particle size is 400 mesh ferric chloride is equal to 2:1;

[0057] (3) Bentonite is pulverized to a particle size of 200 mesh and 300 mesh, and bentonite with diffe...

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Abstract

The invention belongs to the technical field of seawater purifying treatment, particularly relates to a preparation method for a flocculating agent for purifying seawater, and further relates to a flocculating agent prepared through the method. The preparation method for the flocculating agent for purifying the seawater comprises the following steps that starch, ferric trichloride, bentonite and shell powder are smashed to be of different particle sizes and evenly mixed, and the mixed starch, galactomannan, the mixed bentonite, the mixed shell powder, a 2-4 g / L sodium alga acid water solution and mixed ferric trichloride are weighed out according to the proportion; purified water is weighed out, the weighed purified water, mixed starch and mixed ferric trichloride are heated after being evenly mixed, and the starch is gelatinized, and is stirred and evenly mixed with galactomannan, the 2-4 g / L sodium alga acid water solution, the mixed bentonite and the mixed shell powder. Compared with the prior art, the preparation method and the flocculating agent have the advantages that the flocculating agent which is prepared through the preparation method and used for purifying the seawater is high in purifying efficiency and does not generate secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of seawater purification treatment, and in particular relates to a preparation method of a flocculant for purifying seawater, and also relates to a flocculant prepared by the method. Background technique [0002] Pollutants in seawater mainly include petroleum, heavy metals, organic matter, and nutrient salts. With the increasing development of oil development, shipping and oil industry, marine oil spill accidents occur frequently, and oil pollution brings more and more serious harm to the marine environment and marine ecosystem, and can directly or indirectly affect human health. survival and sustainable development. The seawater used in seawater utilization projects is generally near-shore seawater. Due to the increasing pollution of coastal sea areas, near-shore seawater must be purified and pretreated before it can be used. The pretreatment effect directly affects the operating conditions and operation ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C02F1/52C02F103/08
CPCC02F1/52C02F2103/007C02F2103/08
Inventor王鑫平李福娟韩龙江曹丽歆李光梅
OwnerNORTH CHINA SEA ENVIRONMENTAL MONITORING CENT OF STATE OCEANIC ADMINISTATION