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Special poly aluminum chloride for municipal water supply and preparation method of poly aluminum chloride

A polyaluminum chloride, water supply technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of easy occurrence of gel, affecting dissolution, etc., and achieve the effect of improving water quality and excellent turbidity

Inactive Publication Date: 2015-06-17
杭州萧山三江净水剂有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

A Chinese patent discloses a method for preparing high-basic and high-efficiency polymerized aluminum (publication number: CN1843959A). This method is to obtain high-basic and high-performance polychlorinated aluminum by adding a sufficient amount of calcium aluminate powder at one time. Aluminum, since the calcium aluminate powder is a compound, the first acid-base neutralization reaction is the calcium oxide in the calcium aluminate powder, which will inevitably affect the dissolution of aluminum oxide in the calcium powder, and it needs to be checked and monitored from time to time during the production process. Adjustment, prone to gel phenomenon

Method used

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  • Special poly aluminum chloride for municipal water supply and preparation method of poly aluminum chloride

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Embodiment 1

[0020] Embodiment 1: the preparation method of a kind of special polyaluminum chloride for municipal water supply of this example, its steps are:

[0021] Weigh 100 grams of hydrochloric acid with a concentration of 25%, add 18 grams of aluminum hydroxide, which contains Al 2 o 3 % is 64% (m / m), 100-120 0 C stirred and reacted for 2 hours to obtain 2 o 3 It is 9.2% (m / m) aluminum chloride liquid, add 18 grams of calcium aluminate powder in above-mentioned aluminum chloride liquid, the Al of this calcium powder 2 o 3 The % is 50% (m / m), the total calcium is 32% (m / m), the water is 17 grams, and it is kept at 80-120 0 C was reacted for 1 hour to obtain 2 o 3 is 12.0% (m / m); the basicity is 65%; the density is 1.26 g / ml polyaluminum chloride; add 17 grams of calcium aluminate powder to the above polyaluminum chloride liquid, and keep it at 80-100 0 After C reacted for 30 minutes, 63 grams of water was added to obtain 10.1% (m / m) containing Al2O3; the basicity was 90%; the...

Embodiment 2

[0026] Embodiment 2: the preparation method of a kind of special polyaluminum chloride for municipal water supply of this example, its steps are:

[0027] Weigh 100 grams of electronic by-product hydrochloric acid with a concentration of 15%, and Al in this hydrochloric acid 2 o 3 % is 3.5%, the total acidity is 15%, heated to 50 0 C, add 17 grams of calcium aluminate powder, the calcium aluminate powder contains Al 2 o 3 % is 50% (m / m), and the total calcium content is 32% (m / m). Stir the reaction for 2 hours to obtain Al-containing 2 o 3 9.1% (m / m), salinity 70%; polyaluminum chloride liquid with a density of 1.22 g / ml, add 7 grams of calcium aluminate powder to the above liquid, and keep it at 80-100 0 After C reacted for 45 minutes, add 30 grams of water to obtain 2 o 3 It is 7.0% (m / m); the salinity is 88%, the density is 1.19 g / ml special polyaluminum chloride for municipal water supply.

[0028] The chemical reaction formula is:

[0029] 1. HCl + AlCl 3 +Al 2...

Embodiment 3

[0031] Embodiment 3: the preparation method of a kind of special polyaluminum chloride for municipal water supply of this example, its steps are:

[0032] Weigh 100 grams of hydrochloric acid with a concentration of 31%, add 22 grams of aluminum hydroxide, which contains Al 2 o 3 % is 64% (m / m), 100-120 0 C stirred and reacted for 2 hours to obtain 2 o 3 It is 11.5% (m / m) aluminum chloride liquid, add calcium aluminate powder 23 grams in above-mentioned aluminum chloride liquid, the Al of this calcium powder 2 o 3 % is 50% (m / m), total calcium is 32% (m / m), water is 38.5 grams, and it is kept at 80-120 0 C was reacted for 1-2 hours to obtain 2 o 3 is 12.5% ​​(m / m); the basicity is 65%; the density is 1.28 g / ml polyaluminum chloride; add 12 grams of calcium aluminate powder to the above polyaluminum chloride liquid and keep it at 80 0 After reacting above C for 40 minutes, add 53 grams of water to obtain 2 o 3 10.5% (m / m); salinity 80%; density 1.23 g / ml high-efficien...

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Abstract

The invention relates to an agent for water supply treatment, in particular to special poly aluminum chloride for municipal water supply and a preparation method of poly aluminum chloride. Poly aluminum chloride mainly solves the technical problems that calcium oxide in calcium aluminate powder carries out acid-base neutralization reaction to certainly influence dissolving of aluminum oxide in calcium powder, detection and adjustment are required constantly in a production process, and a gel phenomenon easily appears in the prior art. The method comprises the steps of adding an aluminum-containing raw material in hydrochloric acid, stirring for sufficient reaction to form poly aluminum chloride liquid, adding calcium chlorate powder or sodium aluminate into the poly aluminum chloride liquid in a stirring tank for sufficient reaction, immediately adding water to cool and dilute after the reaction, and finally obtaining special poly aluminum chloride for the municipal water supply.

Description

technical field [0001] The invention relates to a water supply treatment agent, in particular to a special polyaluminum chloride for municipal water supply and a preparation method thereof. Background technique [0002] In municipal water treatment, coagulation and sedimentation is an important unit operation step to remove colloidal suspended impurities and organic impurities in water. The effect of coagulation and sedimentation determines the final water quality and the cost of water treatment. Deterioration, and the increase of water treatment volume, but the water treatment structure is too late to expand and increase, which requires the water treatment coagulation effect of the coagulant must be improved. At present, inorganic polymer coagulants such as polyaluminum chloride and polyaluminum ferric chloride have been widely used, but compared with some current water treatment processes, there are still shortcomings such as slow reaction speed and small flocculation vana...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 王伟标何海鸿吴瑛昊吕科金钢阳
Owner 杭州萧山三江净水剂有限公司
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