Polysilicic iron-zinc coagulant and preparation thereof

A technology of polysilicon-iron-zinc and coagulant, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of rapid hydrolysis of residual chroma, low turbidity removal rate, and high cost of raw materials, so as to reduce the floating of flocs Phenomenon, low preparation cost, wide application effect

Active Publication Date: 2009-04-15
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem of poor adaptability to low-temperature and low-turbidity water quality, low turbidity removal rate, residual chroma and rapid hydrolysis of existing iron salt coagulants, complex preparation process, high cost of raw materials and long time The environment produces the problem of secondary pollution, and a kind of polysilicon iron zinc coagulant and preparation method thereof are provided

Method used

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  • Polysilicic iron-zinc coagulant and preparation thereof
  • Polysilicic iron-zinc coagulant and preparation thereof

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specific Embodiment approach 1

[0011] Specific embodiment one: the polysilicon-iron-zinc coagulant of the present embodiment is by weight percentage by the water glass of 30%~70%, the dilute sulfuric acid solution of 5%~20%, the sodium bicarbonate of 1%~10%, 4.5 %~25% of ferrous sulfate, 2.5%~20% of zinc sulfate and 0.3%~2.0% of oxidizing agent; wherein the oxidizing agent is sodium chlorate or potassium permanganate, and the mass concentration of dilute sulfuric acid solution is 20%~ 50%.

specific Embodiment approach 2

[0012] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the polysilicon iron zinc coagulant is made of water glass of 35%~65%, dilute sulfuric acid solution of 6%~18%, 2% ~8% sodium bicarbonate, 5.5%~24% ferrous sulfate, 3.5%~18% zinc sulfate and 0.6%~1.4% oxidant. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Specific embodiment three: the difference between this embodiment and specific embodiment one is: the polysilicon iron zinc coagulant is made of 60% water glass, 10% dilute sulfuric acid solution, 2% sodium bicarbonate, 20% by weight. % ferrous sulfate, 7% zinc sulfate and 1% oxidizing agent. Others are the same as in the first embodiment.

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Abstract

The invention relates to a silicone iron zinc coagulant and a preparation method thereof, relating to an inorganic polymer coagulant and a preparation method thereof. The invention solves the affection of weak adaptability to low temperature and low turbidity water quality, low turbidity removal rate, residual chroma and fast hydrolysis of the existing molysite coagulant, and the problems of complicated preparation process, high cost of raw materials and long time consuming, and production of second pollution to environment. The silicone iron zinc coagulant is prepared by sodium silicate, dilute sulphuric acid solution, sodium bicarbonate, ferrous sulfate, zinc sulfate and an antioxidant. The preparation method comprises the following steps of: 1. weighing raw materials; 2. preparing clustering silicic acid solution; 3. preparing the clustering ferrosilicon zinc solution and 4. adopting a reverse contact type spray drying method or cocurrent flow contact type spray drying method to dry the clustering ferrosilicon zinc solution, thus obtaining the clustering ferrosilicon zinc coagulant. The product has the advantages of being suitable for low temperature and low turbidity water quality, more than 99 percent of the turbidity removal rate, no residual chroma and being not easy to be hydrolyzed, low preparation cost, simple method and no pollution in preparing process.

Description

technical field [0001] The invention relates to an inorganic polymer coagulant and a preparation method thereof. Background technique [0002] In recent years, with the development of social economy and the continuous improvement of living standards, people's requirements for drinking water quality have also become higher and higher, and water consumption has also increased sharply. The corresponding problem is the shortage of high-quality water sources. The problem of water pollution is becoming more and more serious; in order to ensure the sustainable use of water resources, there are many water treatment processes to solve the problem of water environmental pollution, such as coagulation sedimentation method, biochemical method, ion exchange method, adsorption method, chemical oxidation method, electric Dialysis and sewage ecological treatment technology, etc. Among them, the coagulation-sedimentation method is the most widely used and has the best effect, but the existi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 于水利许霞
Owner HARBIN INST OF TECH
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