Aluminum chlorate of polymerized silicic acid and preparation method

A technology of polyaluminum chloride and iron water purifying agent, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of waste of limited natural resources, high cost, uneconomical, etc., and achieve good water purification effect and realize recycling Effects of using and solving pollution problems

Inactive Publication Date: 2007-02-21
JILIN UNIV
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  • Claims
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Problems solved by technology

The aluminum ash one-step method is a method for producing polyaluminum ferric chloride water purifiers from aluminum processing scraps. The raw materials of aluminum ash contain harmful substances such as heavy metals. The relevant national documents have banned the production of water purifiers made of aluminum ash as raw materials. It is used for drinking water treatment; the bauxite acid-dissolving method uses aluminum-containing minerals such as aluminum ore and hard kaolin as raw materials, and can produce polyaluminium-ferric chloride water purifying agent after acid-dissolving and other complicated processes. Such methods have limited sources of raw materials, complex processes, and high costs, which are neither environmentally friendly nor economical. In a sense, they are a waste of limited natural resources.

Method used

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  • Aluminum chlorate of polymerized silicic acid and preparation method

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Effect test

Embodiment 1

[0018] Take 100 grams of circulating fluidized bed fly ash, add 300 milliliters of hydrochloric acid with a mass concentration of 30%, stir continuously at 100° C., continue acid dissolution reaction for 2 hours, and filter to obtain ferric aluminum chloride solution after hydrochloric acid dissolution reaction is completed; Take 100 ml of aluminum ferric chloride solution, heat it and keep stirring. When the temperature reaches 85°C, add 9 grams of calcium aluminate powder one after another. After reacting for 1 hour, settle the material and filter it to separate the solid and liquid, and then you can get the polymerized chloride Aluminum and iron liquid products are dried to obtain solid products.

Embodiment 2

[0020] Get 100 grams of circulating fluidized bed fly ash, add 350 milliliters of hydrochloric acid with a mass concentration of 22.5%, stir continuously at 100° C., and continue the acid dissolution reaction for 2 hours. After the hydrochloric acid dissolution reaction finishes, filter to obtain ferric aluminum chloride solution; 100 ml of ferric aluminum chloride solution, heated and stirred continuously, when the temperature reached 85°C, 12 grams of calcium aluminate powder was added successively, and after reacting for 1 hour, the material was settled and filtered to separate the solid and liquid to obtain polyaluminum chloride The iron liquid product is dried to obtain a solid product.

Embodiment 3

[0022] Take circulating fluidized bed fly ash 100 grams, add mass concentration and be 400 milliliters of hydrochloric acid of 10%, under 100 ℃ of conditions, constantly stir, continuous acid dissolution reaction is 2 hours, after hydrochloric acid stripping reaction finishes, filter and obtain ferric chloride solution; 100 ml of ferric aluminum chloride solution, heating and stirring constantly, when the temperature reaches 85°C, add 15 grams of calcium aluminate powder one after another, and after reacting for 1 hour, settle and filter the material to separate solid and liquid to obtain polyaluminum chloride The iron liquid product is dried to obtain a solid product.

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Abstract

This invention relates to a method for preparing water purifier of polyaluminum ferrum chloride with fly ashes derived from circulating fluidized bed as the raw material. The method comprises: dissolving fly ashes derived from circulating fluidized bed in an acid to prepare aluminum ferrum chloride solution, and adjusting the base saturability to obtain the water purifier. The water purifier can satisfy related national standards. Compared with other water purifiers, the water purifier in this invention has such advantages as simple process, low cost and good water purification ability. The method realizes recovery and recycle of solid wastes, and solves the problem of fly ashes pollution.

Description

Technical field: [0001] The invention relates to a preparation method of a polyaluminum ferric chloride water purifying agent, in particular to a method for producing a polyaluminum ferric chloride water purifying agent by using circulating fluidized bed fly ash as a raw material. Background technique: [0002] Circulating fluidized bed combustion technology is a new type of coal-fired technology, which has the advantages of wide adaptability to coal combustion, low pollution emissions, and high thermal efficiency. In the late 1980s, this technology was introduced into my country and has been widely used, especially in most of the new coal gangue power plants that use coal gangue and low-quality coal as fuel. This technology will gradually replace traditional coal in the field of coal-fired power generation. Powder furnace combustion technology. [0003] At present, the methods for producing polyaluminum ferric chloride water purifying agent mainly include aluminum ash one-s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 魏存弟裴亚利杨殿范
Owner JILIN UNIV
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