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Polyferric sulfate and preparation method of polyferric sulfate

A technology for polymerizing ferric sulfate and waste sulfuric acid, applied in ferric sulfate, chemical instruments and methods, water/sewage treatment, etc., can solve the problems of heavy maintenance tasks, long reaction period, equipment corrosion, etc., and achieve product performance improvement, viscosity The effect of reducing the degree of acidity and increasing the acidity

Active Publication Date: 2016-06-22
广西继禹环保科技有限公司
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  • Abstract
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Problems solved by technology

[0011] At present, the reaction kettle method is mostly used in China to produce polyferric sulfate. This process has defects such as long reaction cycle, serious equipment corrosion, and heavy daily maintenance tasks.

Method used

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  • Polyferric sulfate and preparation method of polyferric sulfate
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Embodiment Construction

[0043] Refer below figure 1 Describe in detail an embodiment of the preparation method of polyferric sulfate provided by the present invention; as shown in the figure, the preparation process of primary polyferric sulfate in this embodiment mainly includes the following steps:

[0044] In step 1, transport ferrous sulfate heptahydrate with a weight ratio of 40%-50% and titanium dioxide waste sulfuric acid with a weight ratio of 60%-50% to the mixing tank for material mixing, and deploy titanium H in white powder waste sulfuric acid 2 SO 4 The concentration range is 21%-23%, and the mixed reaction materials are obtained; during specific implementation, industrial sulfuric acid can be used to adjust the H in the titanium dioxide waste sulfuric acid. 2 SO 4 concentration.

[0045] In step 2, the reaction materials are sent into the reaction tower, and during the process of the reaction materials entering the reaction tower, the weight proportion is 0.2%-0.4%, the metal concen...

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Abstract

The invention discloses polyferric sulfate as well as a preparation method and a preparation device of the polyferric sulfate. The preparation method comprises the following steps: conveying the following components into a mixing tank in percentage by weight: 40 percent to 50 percent of iron sulfate heptahydrate and 60 percent to 50 percent of titanium dioxide waste sulfuric acid, and blending the materials; adjusting the concentration range of the titanium dioxide waste sulfuric acid H2SO4 to be 21 percent to 23 percent to obtain mixed reaction materials; conveying the reaction materials into a reaction tower, and adding a sulfate composite rare-earth solution as a reaction cocatalyst when conveying the reaction materials into the reaction tower; controlling the temperature in the reaction tower to be 40 DEG C to 60 DEG C; after all the blended materials enter the reaction tower, adding a sodium nitrite solution as a reaction catalyst; continually introducing oxygen gas into the reaction tower so that the oxygen gas and the reaction materials make oxidization, hydrolysis and polymerization reactions under the action of the cocatalyst and the catalyst; after effectively converting Fe<2+> ions in the materials into Fe<3+> ions, obtaining liquid polyferric sulfate. With the adoption of the polyferric sulfate as well as the preparation method and the preparation device of the polyferric sulfate, the production efficiency can be greatly improved, environmental hazards are reduced, and a more prominent water purification and coagulation effect is realized.

Description

technical field [0001] The invention relates to environmental protection water resource regeneration technology, in particular to a polymeric ferric sulfate and a preparation method thereof. Background technique [0002] The morphological properties of polyferric sulfate (PFS) are light yellow amorphous powdery solids, very soluble in water, and its 10% (weight) aqueous solution is a reddish-brown transparent solution with good hygroscopicity, and can be widely used in drinking water, industrial Purification treatment of water, various industrial wastewater, urban sewage, sludge dehydration, etc. [0003] In 1974, Japan Iron Mining Co., Ltd. first obtained the patent for preparing polyferric sulfate. This technology uses ferrous sulfate and sulfuric acid as raw materials, uses sodium nitrite as a catalyst, and after 17 hours of air oxidation, a brown polyferric sulfate solution can finally be obtained. This process has certain defects, such as the waste gas generated durin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/14C02F1/52
CPCC01G49/14C02F1/5245
Inventor 彭振啟余皆亨
Owner 广西继禹环保科技有限公司
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