Preparation method of coagulant of polyphosphate ferric chloride

A technology of ferric chloride phosphate and coagulant, which can be used in flocculation/sedimentation water/sewage treatment, etc., and can solve the problem of high cost

Inactive Publication Date: 2012-05-30
TIANJIN TANGGU XINYU ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the method for producing coagulant is a lot, and Chinese patent 89107966.1 (publication number CN1051157A) discloses a kind of method for producing composite macromolecule coa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Phosphating slag (Fe: 18.9%; P: 11.9%), industrial hydrochloric acid (HCl: 30%), dosage ratio (weight ratio): phosphating slag: industrial hydrochloric acid=43:57,

[0019] Put the industrial hydrochloric acid with a total amount of 57% of the material into the reaction kettle, start stirring, slowly add phosphating slag, add in about half an hour, continue stirring for half an hour, stop stirring and let it stand for 1-1.5 hours, then start stirring for 1 hour After the materials are polymerized, the materials are discharged and filtered, and the filtrate is poured into a storage tank and left to mature for more than 24 hours to obtain a clear orange-red liquid, which is the finished product.

Embodiment 2

[0021] Phosphating slag (Fe: 21.4%; P: 13.5%), industrial hydrochloric acid (HCl: 30%), dosage ratio (weight ratio): phosphating slag: industrial hydrochloric acid=38:62,

[0022] Put the industrial hydrochloric acid with a total amount of 62% of the material into the reaction kettle, start stirring, slowly add the phosphating residue, about half an hour after adding, continue stirring for half an hour, stop stirring and let it stand for 1-1.5 hours, then start stirring for 1 hour After the materials are polymerized, the materials are discharged and filtered, and the filtrate is poured into a storage tank and left to mature for more than 24 hours to obtain a clear orange-red liquid, which is the finished product.

[0023] When using the product of the present invention to treat waste water, the following two methods can be adopted:

[0024] Method 1: First mix this product with wastewater according to the required amount, so that the colloidal particles in the wastewater are d...

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PUM

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Abstract

Preparation of a coagulant of polyphosphate ferric chloride adopts waste phosphating residues produced from steel phosphating treatment as raw materials, and the coagulant is especially suitable for the treatment of oil-containing colored industrial wastewater. The product preparation of the invention adopts phosphating residues, industrial hydrochloric acid, and ferrous phosphate as raw materials, wherein the HCl content (weight ratio) is not less than 30%; the phosphating residues and industrial hydrochloric acid are polymerized according to a certain ratio so as to obtain clear orange liquid of polyphosphate ferric chloride. When the coagulant of polyphosphate ferric chloride of the invention is used in water supply and sewage treatment, when compared with existing coagulants, the product of the invention has the characteristics of high oil-removing and decoloration efficiency, few medicament adding amount, wide medicament adding range, and the like; the production processing process of the product does not cause secondary pollution; the production process is simple; waste phosphating residues are used as raw materials; the production cost is low; and thus the product of the invention has low price.

Description

technical field [0001] The invention relates to a preparation method of a novel polymeric ferric chloride phosphate coagulant for water treatment, and the coagulant is especially suitable for treating oily and colored industrial waste water. More specifically, the present invention especially relates to the preparation method of the polymerized ferric chloride phosphate coagulant produced by using waste phosphating slag (a kind of solid slag produced by iron and steel phosphating treatment) as raw material. Background technique [0002] Coagulants are divided into inorganic and organic coagulants. In water supply and sewage treatment, inorganic coagulants are currently the most widely used. Commonly used inorganic coagulants mainly include polyaluminum sulfate, polyferric chloride, polygreen aluminum, and polyferric sulfate. As far as the currently used inorganic coagulants are concerned, low-molecular-weight inorganic coagulants have poor coagulation effects, slow settling...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 廉则波赵后昌
Owner TIANJIN TANGGU XINYU ENVIRONMENTAL PROTECTION TECH
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