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Preparation method of modified polymerized ferric sulfate

A polymerized ferric sulfate and modification technology, which is applied in the fields of ferric sulfate, flocculation/precipitation water/sewage treatment, etc., can solve the problems of narrow application range, yellowing of color, and affecting the application prospect of polyferric sulfate, and achieve fast floc settlement speed Effect

Inactive Publication Date: 2014-08-13
庞红信 +2
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Problems solved by technology

However, in the process of sewage and wastewater treatment in various industries, the use of polyferric sulfate is relatively narrower than that of polyaluminum chloride. The reason is that when treating wastewater, the color of the effluent after adding polyferric sulfate will produce "yellow" disadvantages, which is not good for people's intuitive vision, which affects the application prospect of polyferric

Method used

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Embodiment Construction

[0015] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0016] A preparation method of modified polyferric sulfate, comprising the steps of:

[0017] 1) The preparation process of active silicic acid, take out sodium silicate, ferric chloride, and hydroquinone according to the weight ratio of 85:2.5:1 for later use, and sodium silicate (modulus M is 3.0- 3.2, SiO 2 content ≥ 28%) diluted with water to SiO 2 Content 2%-3%, add dilute sulfuric acid solution with a concentration of 2%-3% and stir, when the viscosity reaches 1'30"-1'40" measured by Tuo's viscometer", add ferric ch...

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Abstract

The invention provides a preparation method of a modified polymerized ferric sulfate. The preparation method comprises the steps of: step 1) preparation of active silicic acid: mixing sodium metasilicate silicate, ferric trichloride and hydroquinone according to a weight ratio of 85:2.5:1; and step 2) preparation of modified polymerized ferric sulfate: mixing active silicic acid with the polymerized ferric sulfate solution according to a weight ratio of 1:(45-55), and then preparing the modified polymerized ferric sulfate after a filtration step in step 3). In treatment of industrial waste water, by adding the modified polymerized ferric sulfate prepared by the method, the turbidity removal effect is obviously better than that of polymer ferric sulfate and the sedimentation speed of flocculating constituent is faster; the decoloring effect of the waste coking water generated after biological treatment is obviously better than that of the polymer ferric sulfate under the same condition; and the dosage is reduced by 20%-35% than that of the polymer ferric sulfate under the effect.

Description

technical field [0001] The invention relates to the technical field of inorganic water treatment coagulants, in particular to a preparation method of modified polyferric sulfate. Background technique [0002] As we all know, polyferric sulfate (referred to as "polyferric"), like polyaluminum chloride, is the most widely used inorganic coagulant for industrial sewage and wastewater treatment in the world. Ferric sulfate has the effect of removing suspended solids in wastewater, removing COD and BOD, removing organic matter such as phenol and benzene and other harmful impurities (such as: sulfide, cyanide and some phosphides) and heavy metals, so polyferric sulfate is widely used in my country. It is widely used in wastewater treatment in many industries. However, in the process of sewage and wastewater treatment in various industries, the use of polyferric sulfate is relatively narrower than that of polyaluminum chloride. The reason is that when treating wastewater, the color...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C01G49/14
Inventor 庞红信芮小平
Owner 庞红信
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