Preparation method for inorganic flocculating agent and enhanced coagulation method for treating low-temperature low-turbidity high-organic matter water body by using inorganic flocculating agent

An inorganic flocculant, low temperature technology, used in flocculation/sedimentation water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., to achieve the effects of good adaptability, easy availability of raw materials and reduced preparation costs

Active Publication Date: 2014-02-19
HARBIN UFORM WATER PURIFIER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to solve the problem that conventional coagulants and coagulation processes used to treat low-temperature, low-turbidity and high-organic compound refractory water bodies are not efficient, cheap, non-toxic, and have simple preparation processes. , and provide a preparation method of an inorganic flocculant and an enhanced coagulation method using it to treat water with low temperature, low turbidity and high organic matter

Method used

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  • Preparation method for inorganic flocculating agent and enhanced coagulation method for treating low-temperature low-turbidity high-organic matter water body by using inorganic flocculating agent
  • Preparation method for inorganic flocculating agent and enhanced coagulation method for treating low-temperature low-turbidity high-organic matter water body by using inorganic flocculating agent

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specific Embodiment approach 1

[0020] Specific embodiment one: the preparation method of a kind of inorganic flocculant of present embodiment, carry out according to the following steps:

[0021] The water glass solution is evenly dispersed in the metal salt solution, and after stirring and aging, the inorganic flocculant is obtained; wherein the water glass solution is a sodium salt water glass solution or a potassium salt water glass solution; the metal salt solution is an iron salt solution , aluminum salt solution or iron salt aluminum salt mixed solution, the iron salt in the described iron salt solution is ferric chloride, ferric sulfate or ferric nitrate, the aluminum salt in the described aluminum salt solution is aluminum chloride, aluminum sulfate or aluminum nitrate.

[0022] When the metal salt solution described in this embodiment is a mixed solution of iron salt and aluminum salt, the iron salt and aluminum salt are mixed in any ratio.

[0023] The inorganic flocculant prepared in this embodi...

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the SiO 2 The water glass solution with a mass concentration of 0.25% to 28% is uniformly dispersed in a metal salt solution with a mass concentration of metal ions of 0.1% to 5.0%, and after stirring and aging, an inorganic flocculant is obtained; the SiO 2 SiO in a water glass solution with a mass concentration of 0.25% to 28% 2 The molar ratio of the metal ion to the metal salt solution with a mass concentration of the metal ion of 0.1% to 5.0% is (0.1 to 5):1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the SiO 2 The water glass solution with a mass concentration of 0.5% to 5% is uniformly dispersed in a metal salt solution with a mass concentration of metal ions of 0.5% to 3.5%, and after stirring and aging, an inorganic flocculant is obtained; the SiO 2 SiO in a water glass solution with a mass concentration of 0.5% to 5% 2 The molar ratio of metal ions in the metal salt solution with a mass concentration of 0.5% to 3.5% of metal ions is (0.1 to 2):1. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a preparation method for a novel inorganic flocculating agent and an enhanced coagulation method for treating a low-temperature low-turbidity high-organic matter water body by using the inorganic flocculating agent. The objective of the invention is to overcome the problems that conventional coagulants and coagulation processes do not simultaneously have the advantages of high efficiency, low cost, no toxicity and simple preparation process in treatment of one or a plurality of composite difficult-to-treat water bodies with low temperature, low turbidity and high content of organic matters. The preparation method provided by the invention comprises the following steps: uniformly dispersing a water glass solution with a certain concentration into a metal salt solution with a certain concentration and carrying out stirring and curing so as to obtain the inorganic flocculating agent. The enhanced coagulation method comprises the following steps: adding a traditional coagulant in the stage of mixing during water treatment process; then adding the inorganic flocculating agent after a mixed reaction; adding alkali lye into a water pipeline located between a sedimentation tank and a water conveying pump station or into the body of the sedimentation tank; and adjusting a pH value. The inorganic flocculating agent and the enhanced coagulation method are applicable to treatment of tap water, domestic sewage and industrial waste water.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a preparation method of a novel flocculant and an enhanced coagulation method using the flocculant to treat low-temperature, low-turbidity, and high-organic matter water bodies. Background technique [0002] The coagulation treatment of low temperature, low turbidity, high organic matter and high color water caused by high content of natural organic matter has always been a difficult problem in the field of water treatment, and it is also one of the problems that need to be solved urgently. Especially in some areas with high cold, high forest vegetation coverage and heavy industrial pollution, when the surface water sources in these areas are used as tap water sources, these difficult problems often appear. At present, most of the water treatment processes in waterworks are coagulation-sedimentation-filtration-disinfection conventional water treatment processes. The sec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F9/04
Inventor 沈吉敏王斌远陈忠林崔学刚张鹏冲
Owner HARBIN UFORM WATER PURIFIER TECH
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