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Granular mineralizer for conditioning desalted water as well as preparation method and application of granular mineralizer

A mineralizer and desalinated water technology, applied in the field of drinking water treatment, can solve the problems of slow dissolution rate of calcium and magnesium, large footprint, poor conditioning effect, etc., to achieve health benefits, optimize effluent water quality, and large reserves Effect

Active Publication Date: 2015-06-10
浙江至美环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When dolomite is directly used as a granular mineralizer, the dissolution rate of calcium and magnesium is slow, and the conditioning effect is poor, resulting in a large equipment footprint, which cannot achieve the purpose of quickly adjusting the quality of desalinated water

Method used

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  • Granular mineralizer for conditioning desalted water as well as preparation method and application of granular mineralizer
  • Granular mineralizer for conditioning desalted water as well as preparation method and application of granular mineralizer
  • Granular mineralizer for conditioning desalted water as well as preparation method and application of granular mineralizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Pulverizing the bulk dolomite into particles with a particle diameter of 3 mm to 5 mm;

[0042] (2) The pulverized dolomite was lightly burned for 3 hours at a temperature of 780° C., and the weight loss rate was 22.83%.

[0043] (3) Carry out X-ray diffraction analysis and scanning electron microscope analysis on lightly burned dolomite, and compare its surface pores and pore size distribution.

[0044] The X-ray diffraction analysis and the scanning electron microscope analysis of the mineralizer prepared under the above-mentioned conditions are respectively as follows: figure 1 (b) and figure 2 (b) shown. Depend on figure 1 It can be seen from (b) that compared with the raw ore, the surface pores of the mineralizer in Example 1 are significantly increased, and the pore size distribution is uniform. Depend on figure 2 (b) It can be seen that dolomite is completely decomposed to form CaCO when lightly burned at 780°C for 3 hours 3 with MgO.

Embodiment 2

[0046] (1) Pulverizing the bulk dolomite into particles with a particle diameter of 3 mm to 5 mm;

[0047] (2) The pulverized dolomite was lightly burned at 870° C. for 0.5 hour, and the weight loss rate was 23.17%.

[0048] (3) Carry out X-ray diffraction analysis and scanning electron microscope analysis on lightly burned dolomite, and compare its surface pores and pore size distribution.

[0049] The X-ray diffraction analysis and the scanning electron microscope analysis of the mineralizer prepared under the above-mentioned conditions are respectively as follows: figure 1 (c) and figure 2 (c) shown. Depend on figure 1 It can be seen from (c) that compared with the raw ore, the mineralizer in Example 2 has a large surface porosity, uniform pore size distribution, and no agglomeration. Depend on figure 2 (c) It can be seen that the main component of the mineralizer is CaCO 3 with MgO.

Embodiment 3

[0051] (1) Pulverizing the bulk dolomite into particles with a particle diameter of 3 mm to 5 mm;

[0052] (2) The pulverized dolomite is lightly burned for 0.5 hour at a temperature of 1000° C., and the weight loss rate is 35%.

[0053] (3) Carry out X-ray diffraction analysis and scanning electron microscope analysis on lightly burned dolomite, and compare its surface pores and pore size distribution.

[0054] The X-ray diffraction analysis and the scanning electron microscope analysis of the mineralizer prepared under the above-mentioned conditions are respectively as follows: figure 1 (d) and figure 2 (d) shown. Depend on figure 1 In (d), it can be seen that the mineralizer has "overburned" phenomenon, and some particles transform into liquid phase and begin to agglomerate together. Depend on figure 2 (d) It can be seen that when dolomite is lightly burned at 900°C to 1000°C, Baiyunshan is transformed into CaCO in a short time 3 with MgO, CaCO 3 Continue to decomp...

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Abstract

The invention discloses a granular mineralizer for conditioning desalted water. The granular mineralizer is produced by light burning dolomite particles and contains 40%-70% of CaCO3 and 20%-35% of MgO. The invention provides a preparation method of the granular mineralizer; and the preparation method comprises light burning the marble particles for 0.5-4 hours at a temperature ranging from 700 to 900 DEG C. The invention also provides a method for conditioning the desalted water by use of the granular mineralizer; and the desalted water is urged to flow through a mineralizing device in which the granular mineralizer is loaded. The granular mineralizer is produced by light burning the dolomite particles through a simple process, and comprises the major components CaCO3 and MgO, and the mineral elements such as calcium and magnesium are easy to dissolve out; the granular mineralizer is large in surface porosity and uniform in pore size distribution; and when the granular mineralizer is applied to conditioning the desalted water, the contact area of the desalted water and the granular mineralizer is increased, and the speed and the effect of conditioning are increased.

Description

technical field [0001] The invention relates to the field of drinking water treatment, in particular to a granular mineralizer for desalinated water conditioning and its preparation method and application. Background technique [0002] Facing severe water environment problems, desalination of seawater has become an important method to solve the world's water crisis. According to the separation process, seawater desalination methods mainly include distillation, membrane, crystallization, solvent extraction and ion exchange. With the development of membrane science and technology, reverse osmosis has become the mainstream method of seawater desalination. The reverse osmosis method is to apply a pressure greater than the osmotic pressure on the seawater side, so that the water molecules pass through the semi-permeable membrane and the solute molecules are trapped, so as to realize the separation of brine. Reverse osmosis seawater desalination has the characteristics of small ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/68
Inventor 程艳红陈红甘树王鑫阳徐百龙阳旭
Owner 浙江至美环境科技有限公司