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Spherical hydroxyapatite fluoride-removing material regenerated powder and application thereof

A technology of hydroxyapatite and fluorine materials, applied in the field of water treatment, can solve the problem of high regeneration cost, and achieve the effects of low treatment cost, cost reduction and water quality safety.

Inactive Publication Date: 2013-10-16
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: In order to overcome the defect of high regeneration cost of existing defluoridation equipment and methods, the first purpose of the present invention is to provide a regenerated powder of spherical hydroxyapatite defluoridation material

Method used

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  • Spherical hydroxyapatite fluoride-removing material regenerated powder and application thereof

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Experimental program
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Effect test

Embodiment 1

[0033] The regenerated powder of spherical hydroxyapatite defluoridation material includes kaolin and aluminum sulfate with a mass ratio of 20:80; wherein, the particle size of kaolin is between 0.01-1 μm.

[0034] Utilize above-mentioned recycled powder to defluoride groundwater, comprise the following steps:

[0035] (1) Put the regenerated powder into the water inlet pipe of the groundwater defluorination device. The amount of regenerated powder added per liter of groundwater is 120mg. Mix evenly in the fluorine device;

[0036] (2) The groundwater mixed with regenerated powder flows into the spherical hydroxyapatite filter layer of the groundwater defluoridation device. The thickness of the spherical hydroxyapatite filter layer is 2.0m, and the thickness of the spherical hydroxyapatite filter layer increases The defluoridation effect is better, and the spherical hydroxyapatite particle size used in the spherical hydroxyapatite filter layer is between 0.5-1.0mm; the upward...

Embodiment 2

[0041] The regenerated powder of spherical hydroxyapatite defluoridation material includes clay and polyaluminum chloride with a mass ratio of 10:90; wherein, the particle size of kaolin is between 0.01-1 μm.

[0042] Utilize above-mentioned recycled powder to defluoride groundwater, comprise the following steps:

[0043] (1) Put the regenerated powder into the water inlet pipe of the groundwater defluorination device. The amount of regenerated powder added per liter of groundwater is 60mg. Mix evenly in the fluorine device;

[0044] (2) The groundwater mixed with regenerated powder flows into the spherical hydroxyapatite filter layer of the groundwater defluorination device. The thickness of the spherical hydroxyapatite filter layer is 3.0m. The spherical hydroxyapatite filter layer used in the spherical hydroxyapatite filter layer The particle size of hydroxyapatite is between 0.5-1.0mm; adopting the upward flow filtration method, the flow rate of groundwater in the spheric...

Embodiment 3

[0049] Spherical hydroxyapatite defluoridation material regenerated powder, including natural particles and inorganic aluminum salts at a mass ratio of 30:70, wherein the natural particles are a mixture of kaolin and clay at a mass ratio of 1:1, and the inorganic aluminum salts are at a mass ratio of It is a 1:1 mixture of aluminum sulfate and polyaluminum chloride; wherein, the particle size of natural particles is between 0.01-1 μm.

[0050] Utilize above-mentioned recycled powder to defluoride groundwater, comprise the following steps:

[0051] (1) Put the regenerated powder into the water inlet pipe of the groundwater defluorination device. The amount of regenerated powder added per liter of groundwater is 200mg. Mix evenly in the fluorine device;

[0052] (2) The groundwater mixed with regenerated powder flows into the spherical hydroxyapatite filter layer of the groundwater defluoridation device. The thickness of the spherical hydroxyapatite filter layer is 4.0m. The sp...

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Abstract

The invention provides spherical hydroxyapatite fluoride-removing material regenerated powder comprising natural particles and inorganic aluminum salt. The invention also provides a method for removing fluoride from underground water by using the regenerated powder. The spherical hydroxyapatite fluoride-removing material regenerated powder provided by the invention has the advantages of scientific formula, wide raw material source, and low cost. An underground water fluoride-removing method provided by the invention has the advantages of simple technology, convenient application, low cost, good fluoride-removing effect, high outlet water quality, no need of periodic regeneration, low wastewater production, low processing cost, and good popularization and application prospect.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a regenerated powder of a spherical hydroxyapatite defluoridation material, and also relates to a continuous defluorination method using the regenerated powder. Background technique [0002] Fluorosis, caused by ingestion of excess fluoride in drinking water, is a serious problem worldwide. The problem of fluorine pollution in China's groundwater is prominent. The distribution area of ​​high-fluorine water exceeds 1.6 million square kilometers, involving nearly 100 million people who supply water. [0003] Existing groundwater defluoridation technologies mainly include coagulation sedimentation, activated alumina adsorption, electrodialysis, reverse osmosis, ion exchange, adsorption, bone charcoal adsorption, and zeolite defluorination, etc. All there are certain problems in this kind of technology, so that there are certain difficulties in its popularization and appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/34B01J20/08C02F1/28C02F101/14
Inventor 刘成刘泽山
Owner HOHAI UNIV
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