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Recycling process of polyaluminium chloride filter residue

A technology of polyaluminum chloride and filter residue, applied in aluminum chloride, aluminum halide and other directions, can solve problems such as waste of resources, and achieve the effects of reduced manufacturing cost, low water-insoluble matter content, and wide application range

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 polyaluminium chloride filter residue
  • Recycling process of polyaluminium chloride filter residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) In the primary reactor 1 (acid-resistant reaction vessel with stirring device and utilizing steam heating), 175 parts of appropriate amount of water F and industrial hydrochloric acid A are added while stirring, and it is mixed with a hydrochloric acid solution whose volume concentration is 23%; Add 35 parts of filter residue B under normal temperature and stir until filter residue B completely dissolves into a slurry; raise the temperature to 60-80°C, start adding 110 parts of aluminum-containing waste residue C, and continue to heat up during the adding process, and wait for aluminum-containing waste residue C to be added After the addition is complete, the temperature of the feed liquid system is controlled at 95-115° C., and the reaction is carried out for 3 hours under normal pressure; the salinity of the feed liquid in the primary reaction kettle is controlled at 27% ± 10%;

[0028] 2) The feed liquid after reaction is carried out liquid slag separation by liqu...

Embodiment 2

[0031] 1) In the primary reaction kettle 1 (acid-resistant reaction vessel with stirring device and utilizing steam heating), add an appropriate amount of water F and 185 parts of industrial hydrochloric acid A while stirring to prepare a hydrochloric acid solution with a volume concentration of 25%; Add 45 parts of filter residue B under normal temperature and stir until filter residue B completely dissolves into a slurry; raise the temperature to 60-80°C, start adding 90 parts of aluminum-containing waste residue C, and continue to heat up during the adding process, and wait for aluminum-containing waste residue C to be added After the addition is completed, the temperature of the feed liquid system is controlled at 95-115° C., and the reaction is carried out for 4 hours under normal pressure; the salinity of the feed liquid in the primary reaction kettle is controlled at 27% ± 10%;

[0032] 2) The reacted feed liquid is separated from the liquid slag through the plate and f...

Embodiment 3

[0035] 1) In the primary reaction kettle 1 (acid-resistant reaction vessel with stirring device and utilizing steam heating), add an appropriate amount of water F and 200 parts of industrial hydrochloric acid A while stirring, and prepare a hydrochloric acid solution with a volume concentration of 27%; Add 60 parts of filter residue B under pressure and normal temperature, stir until filter residue B is completely dissolved into a slurry; raise the temperature to 60-80°C, start adding 80 parts of aluminum-containing waste residue C, continue to heat up during the adding process, wait for aluminum-containing waste residue C to be added After the addition is complete, the temperature of the feed liquid system is controlled at 95-115° C., and the reaction is carried out for 4 hours under normal pressure; the salinity of the feed liquid in the primary reaction kettle is controlled at 27% ± 10%;

[0036] 2) The feed liquid after the reaction is separated by pressure filtration of the...

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Abstract

The invention discloses a recycling process of polyaluminium chloride filter residue; the process is as follows: adding water and hydrochloric acid into a first reaction kettle to prepare a 22-28% hydrochloric acid solution, adding the filter residue, stirring until the filter residue is dissolved; heating to 55 to 85 DEG C, adding aluminium-containing waste slag, after the addition, controlling the material liquid system temperature to be 92 to 118 DEG C for reacting for 2.5-5h; controlling the basicity of the material liquid after the reaction to be 27% + / -11% by adjustment of weight parts of the hydrochloric acid and the filter residue; separating the residue from the material liquid after the reaction, taking mother liquor, 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 for 2.5-5h to obtain liquid polyaluminium chloride; and 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 polyaluminium chloride production system without addition of process equipment and other materials, greatly reduces the polyaluminium chloride production cost, reduces filter residue emissions, and conforms to environmental protection concepts of circular economy, energy saving and emission reduction.

Description

technical field [0001] The invention relates to a polyaluminum chloride filter residue recycling process. Background technique [0002] Polyaluminum chloride (PAC) is a high-efficiency inorganic polymer coagulant, which has the advantages of high efficiency, low consumption, low price, and convenience. Its water purification effect far exceeds other water purification such as ferric chloride and aluminum sulfate. agent. At present, there are many production methods for polyaluminum chloride, one of which is to produce polyaluminum chloride by using the aluminum-containing waste slag after neutralizing the surface pickling waste liquid of aluminum ingots and aluminum strips as raw materials, which can greatly reduce the manufacturing cost. And recycle aluminum-containing waste residue, but in the production process will produce filter residue accounting for about 3-6% of its total output, if it is calculated by a production enterprise with an annual output of 10,000 tons of ...

Claims

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Application Information

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IPC IPC(8): C01F7/56
CPCC01F7/56
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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