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Polymeric magnesium silicate-sulfate composite flocculant

A technology of composite flocculant and polymagnesium silicate, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of poor ammonia nitrogen removal effect, small water quality application range, large dosage, etc., and achieves fast sedimentation and flocculation The effect of body size and molecular chain growth

Inactive Publication Date: 2011-11-30
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of large dosage of traditional flocculants, poor ammonia nitrogen removal effect and small application range of water quality, and provides a polysilicate magnesium salt composite flocculant

Method used

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specific Embodiment approach 1

[0010] Specific implementation mode 1: In this embodiment, the polysilicate magnesium salt composite flocculant is composed of 30% to 40% of silicate, 20% to 30% of magnesium salt, 0.1% to 30% of aluminum salt, 0.1% ~30% iron salt, 0.1%~30% adjuvant A and 0.1%~30% adjuvant B; wherein the silicate is sodium silicate or potassium silicate; magnesium salt is magnesium sulfate Or magnesium chloride; Aluminum salt is aluminum sulfate or aluminum chloride; Iron salt is ferric sulfate or ferric chloride; Adjuvant A is any one of soluble phosphate, calcium oxide, polyacrylamide (PAM), chitosan or A mixture of several kinds; Adjuvant B is any one of sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate or potassium bicarbonate.

[0011] When the auxiliary agent A described in this embodiment is a mixture, each component is mixed in any ratio.

[0012] The preparation method of the polysilicate magnesium salt composite flocculant of the presen...

specific Embodiment approach 2

[0015] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the polysilicate magnesium salt composite flocculant consists of 32% to 38% silicate, 22% to 28% magnesium salt, 0.5% ~25% aluminum salt, 0.5%~25% iron salt, 0.5%~25% adjuvant A and 0.5%~25% adjuvant B. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0016] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the polysilicate magnesium salt composite flocculant consists of 33% to 37% silicate, 23% to 27% magnesium salt, 1% ~20% aluminum salt, 1%~20% iron salt, 1%~20% adjuvant A and 1%~20% adjuvant B. Others are the same as in the first embodiment.

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Abstract

The invention discloses a polymeric magnesium silicate-sulfate composite flocculant, and relates to a flocculant for water treatment. The invention aims to solve the problem that the traditional flocculant has a large adding amount, a low ammonia nitrogen removing effect and a narrow water application range. The polymeric magnesium silicate-sulfate composite flocculant is prepared from silicate, magnesium salt, aluminum salt, iron salt, an aid A and an aid B. When the polymeric magnesium silicate-sulfate composite flocculant is used for treating 15DEG C domestic sewage, the suspended matter removing rate is 95-99 percent, the chemical oxygen demand (COD) removing rate is 60-70 percent, the PO4<3->-P removing rate is 95-99 percent and the ammonia nitrogen removing rate is 15-20 percent. Compared with the traditional flocculant, the polymeric magnesium silicate-sulfate composite flocculant has a small dosage and a wide water application range and is applied to the field of water treatment.

Description

technical field [0001] The invention relates to a flocculant for water treatment. Background technique [0002] Flocculation is an important water purification method widely used in drinking water treatment and sewage treatment. In drinking water treatment, flocculation sedimentation is an effective means to remove suspended solids and colloids in raw water; in sewage treatment, it can be used as pretreatment before biochemical treatment, or can be strengthened synchronously with biochemical treatment, which can efficiently remove suspended solids and improve Biodegradability of sewage. [0003] At present, the commonly used flocculants in production are traditional inorganic flocculant aluminum salts and iron salts (PAC, PFS, etc.), which use the metal cations hydrolyzed into the water to produce adsorption-electricity neutralization with the negatively charged colloids in the water, so that the colloids Coagulation and destabilization, but due to its small molecular weig...

Claims

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Application Information

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IPC IPC(8): C02F1/52C02F1/56
Inventor 李伟光郭旋田文德张卉
Owner HARBIN INST OF TECH
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