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Recycling process of polymeric aluminum ferric chlorine sulfate filter residue

A technology for polymerizing aluminum ferric bisulfate and filtering residues, which is applied in the fields of iron compounds, inorganic chemistry, chemical instruments and methods, etc., can solve problems such as waste of resources, and achieve the effects of improving salinity, reducing residual aluminum ions, and low cost of raw materials

Active Publication Date: 2015-03-11
蓝保(厦门)水处理科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment methods of filter residues are mainly through landfill or directly used as building materials, resulting in a huge waste of resources.

Method used

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  • Recycling process of polymeric aluminum ferric chlorine sulfate filter residue
  • Recycling process of polymeric aluminum ferric chlorine sulfate filter residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Add an appropriate amount of water G into the primary reaction kettle 1 (an enamel reaction kettle with a stirring device), start stirring, and add 120 parts of 31% hydrochloric acid A and 6 parts of 98% sulfuric acid B successively under normal pressure conditions; add filter residue C 20 parts, stirred until the filter residue C is completely dissolved into a slurry; add 30 parts of iron-containing bauxite powder D, raise the temperature to 95-110°C, keep it under normal pressure for 3 hours, and take samples for detection; by adjusting hydrochloric acid, sulfuric acid and The parts by weight that the filter residue adds is at 19% ± 6% to control the basicity of the feed liquid in the primary reaction kettle after the reaction is completed;

[0028] 2) The feed liquid after reaction is carried out liquid slag separation by liquid slag separation device 2, obtains 25 parts of mother liquor and filter residue C by pressure filtration of plate and frame filter press in...

Embodiment 2

[0031] 1) Add an appropriate amount of water G into the primary reaction kettle 1 (an enamel reaction kettle with a stirring device), start stirring, and add 150 parts of 31% hydrochloric acid A and 5 parts of 98% sulfuric acid B successively under normal pressure conditions; add filter residue C 30 parts, stirred until the filter residue C completely dissolves into a slurry; add 40 parts of iron-containing bauxite powder D, raise the temperature to 95-110°C, keep it under normal pressure for 4 hours, and take samples for detection; The parts by weight that the filter residue adds is at 19% ± 6% to control the basicity of the feed liquid in the primary reaction kettle after the reaction is completed;

[0032] 2) Separating the reacted feed liquid through the plate and frame filter press 2 to obtain 25 parts of mother liquor and filter residue C; take the mother liquor and add it to the secondary reaction kettle 3 (an acid-resistant polymerization reaction vessel heated by steam...

Embodiment 3

[0035]1) Add an appropriate amount of water G into the primary reaction kettle 1 (an enamel reaction kettle with a stirring device), start stirring, and add 110 parts of 31% hydrochloric acid A and 12 parts of 98% sulfuric acid B successively under normal pressure conditions; add filter residue C 25 parts, stir until the filter residue C is completely dissolved into a slurry; add 25 parts of iron-containing bauxite powder D, raise the temperature to 95-110°C, keep it under normal pressure for 3.5 hours, and take samples for detection; and the parts by weight that filter residue adds are at 19% ± 6% to control the basicity of the feed liquid in the primary reaction kettle after the reaction is completed;

[0036] 2) Separating the reacted feed liquid through the plate and frame filter press 2 to obtain 25 parts of mother liquor and filter residue C; take the mother liquor and add it to the secondary reaction kettle 3 (an acid-resistant polymerization reaction vessel heated by st...

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Abstract

The invention discloses a recycling process of polymeric aluminum ferric chlorine sulfate filter residue; the process is as follows: adding water, hydrochloric acid and sulfuric acid into a first reaction kettle, adding the filter residue, stirring until the filter residue is completely dissolved; adding iron-containing trihydrate bauxite powder for reacting at 93 to 115 DEG C for 2-5h; controlling the basicity of the material liquid after the reaction to be 19% + / -7% by adjustment of weight parts of hydrochloric acid, sulfuric acid and the filter residue; separating the residue from the material liquid after the reaction, taking mother liquor, adding a proper amount of water, adding calcium aluminate powder; adjusting the material liquid density to be greater than or equal to 1.20g / ml, adding a synergist solution, reacting at 85-125 DEG C under normal pressure for 3-5h to obtain liquid polymeric aluminum ferric chlorine sulfate; collecting and recycling the produced filter residue for reusing in production system to continue participating into the reaction. The recycling process achieves reuse of the filter residue in the polymeric aluminum ferric chlorine sulfate production without addition of process equipment and other materials, greatly reduces the polymeric aluminum ferric chlorine sulfate production cost, reduces filter residue emissions, and is circular and economic.

Description

technical field [0001] The invention relates to a process for reusing filter residue of polymerized bis-acid aluminum iron. Background technique [0002] Polymerized aluminum iron bis-acid is a new type of high-efficiency water purifier, which integrates the advantages of aluminum salt and iron salt-based high-efficiency water purifiers. agent. However, in the process of using iron-containing bauxite powder as the main raw material to produce polyaluminum ferric acid, filter residues accounting for about 6-9% of the total output will be produced. If the annual output of 10,000 tons of liquid polyaluminum iron According to the production enterprise of the product, it is necessary to produce 600-900 tons of filter residue a year. After testing, the incompletely dissolved effective iron oxide component of the filter residue accounts for 15-20% of the total filter residue, and the incompletely dissolved effective alumina component accounts for 20-30% of the total filter residu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00
Inventor 陈嘉宾吕奋勇王志巍吕奋志
Owner 蓝保(厦门)水处理科技有限公司
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