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Preparation method of composite type inorganic polymeric flocculating agent and application thereof

An inorganic polymer and flocculant technology, applied in the preparation and application of flocculants, the preparation and application of composite inorganic polymer flocculants, can solve the problems of secondary pollution, high chroma of effluent, poor stability, etc., and achieve Wide application range, good flocculation effect and convenient operation

Active Publication Date: 2012-10-31
SHANDONG NEWTIME PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymeric ferric sulfate (PFS) is a flocculant with good performance, but after treatment, the color of the effluent is relatively high, and the degree of polymerization of a single polymeric ferric sulfate is not high, it is unstable for long-term storage, and it is easy to produce precipitation. Therefore, in polyferric sulfate Introducing organic and inorganic components to modify them has become a research hotspot in recent years.
[0004] Chinese patent 200710067347.8 discloses a synthetic method of polyferric sulfate, but the polymeric ferric sulfate flocculant synthesized by this method has a higher basicity, and the higher the basicity, the worse the stability; Chinese patent 200910042578.2 discloses a An iron-based composite water treatment agent FPFS-1 and its preparation method, but the iron-based composite flocculant prepared by this method does not specifically describe its decolorization effect and engineering examples; a composite net for wastewater treatment is disclosed in Chinese patent 200510049584.2 Water agent, but the content of aluminum chloride in the water purifying agent component prepared by this method is high, so it is easy to produce secondary pollution

Method used

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  • Preparation method of composite type inorganic polymeric flocculating agent and application thereof
  • Preparation method of composite type inorganic polymeric flocculating agent and application thereof
  • Preparation method of composite type inorganic polymeric flocculating agent and application thereof

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Effect test

Embodiment 1

[0026] Dilute 5.52 kg of water glass (the mass fraction of sodium silicate is 57%) with 20 kg of water and add it to the reaction kettle, add 3.8 kg of concentrated sulfuric acid, stir at room temperature for 2 hours, and perform activated polymerization at a stirring speed of 100-120 rpm to obtain Semi-finished product A; Add 116 kg of ferrous sulfate heptahydrate, 34.1 kg of water, 3.6 kg of concentrated sulfuric acid, 3.0 kg of zinc sulfate heptahydrate, 4.0 kg of magnesium sulfate heptahydrate, and 3.0 kg of anhydrous calcium chloride in the semi-finished product A. The temperature is raised to 40°C, stirring to dissolve the above-mentioned substances, the stirring speed is 120-150 rpm, and the semi-finished product B is obtained; 6.2 kg of sodium chlorate and 0.6 kg of potassium permanganate are slowly added dropwise to the semi-finished product B at the same time, and the reaction kettle Stir until the sodium chlorate and potassium permanganate are added dropwise with the...

Embodiment 2

[0028] Dilute 3.46 kg of water glass (the mass fraction of sodium silicate is 57%) with 15 kg of water and add it to the reaction kettle, add 3.5 kg of concentrated sulfuric acid, stir at room temperature for 2 hours, and perform activated polymerization at a stirring speed of 100-120 rpm to obtain Semi-finished product A; Add 130 kg of ferrous sulfate heptahydrate, 26.1 kg of water, 6.3 kg of concentrated sulfuric acid, 2.0 kg of zinc sulfate heptahydrate, 3.0 kg of magnesium sulfate heptahydrate, and 2.0 kg of anhydrous calcium chloride in the semi-finished product A. The temperature is raised to 40°C, stirring to dissolve the above-mentioned substances, the stirring speed is 120-150 rpm, and the semi-finished product B is obtained; 7.6 kg of sodium chlorate and 0.84 kg of potassium permanganate are slowly added dropwise to the semi-finished product B at the same time. Stir and oxidize under the condition of raising the temperature to 65°C until the sodium chlorate and potass...

Embodiment 3

[0030]Dilute 4.62 kg of water glass (the mass fraction of sodium silicate is 57%) with 20 kg of water and add it to the reaction kettle, add 4.0 catties of concentrated sulfuric acid, stir at room temperature for 2 hours, and perform activated polymerization at a stirring speed of 100-120 rpm to obtain Semi-finished product A; Add 122 kg of ferrous sulfate heptahydrate, 48 kg of water, 5.0 kg of concentrated sulfuric acid, 2.6 kg of zinc sulfate heptahydrate, 3.4 kg of magnesium sulfate heptahydrate, and 2.4 kg of anhydrous calcium chloride in the semi-finished product A. The temperature is raised to 40°C, stirring to dissolve the above-mentioned substances, the stirring speed is 120-150 rpm, and the semi-finished product B is obtained; 7.1 kg of sodium chlorate and 0.77 kg of potassium permanganate are slowly added dropwise to the semi-finished product B at the same time. Stir and oxidize with the temperature raised to 55°C until the sodium chlorate and potassium permanganate are...

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Abstract

The invention discloses preparation of a composite type inorganic polymeric flocculating agent and an application thereof, and belongs to the field of wastewater treatment. The flocculating agent takes ferrous sulfate septihydrate and sodium silicate as main raw materials; and fewer metal ions including Zn<2+>, Mg<2+>, Ca<2+> and the like are added, and steps of activating, mixing, oxidizing, curing and the like are carried out to prepare the composite type inorganic polymeric flocculating agent. A preparation process of the flocculating agent has the advantages of simple preparation process, low cost and excellent flocculating, de-coloring and dephosphorization effects on sewage; a product is liquid and the product stability is good; and the product can be directly added so that the use is convenient.

Description

technical field [0001] The invention relates to the preparation and application of a flocculant, in particular to the preparation and application of a composite inorganic polymer flocculant, which belongs to the field of wastewater treatment. Background technique [0002] The flocculation sedimentation method is an economical and simple sewage treatment method widely used at home and abroad to improve the efficiency of sewage treatment. According to the chemical composition of flocculant, it can be divided into inorganic coagulant and organic flocculant. [0003] The flocculants currently on the market are mainly aluminum and iron flocculants, such as aluminum sulfate, aluminum chloride, polyaluminum chloride (PAC), polyaluminum sulfate (PAS), ferric sulfate, ferric chloride, polyferric chloride (PFC) and polyferric sulfate (PFS), etc. After the aluminum flocculant treats the sewage, the aluminum content in the effluent increases. Due to the cytotoxicity of aluminum, alumi...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 苏建文徐家栋陈建华王彩冬
Owner SHANDONG NEWTIME PHARMA
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