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Preparation process and preparation device of anhydrous magnesium chloride

Anhydrous magnesium chloride and preparation equipment technology, applied in the direction of magnesium chloride, magnesium halide, etc., can solve the problems of high energy consumption, low efficiency, low consumption and dehydration efficiency, and achieve high corrosion resistance, stable operation, and clear dehydration links.

Active Publication Date: 2013-06-05
NANTONG STAR GRAPHITE EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: to overcome the defects of low efficiency and high energy consumption in the traditional preparation of anhydrous magnesium chloride, and provide a preparation process of anhydrous magnesium chloride with low consumption and high dehydration efficiency

Method used

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  • Preparation process and preparation device of anhydrous magnesium chloride

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Comparison scheme
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Embodiment 1

[0026] The diameter of the three heating regions is 2m, the thickness of the graphite layer is 150mm, and the thickness of the flexible graphite layer is 3mm. The contact surface of the dynamic and static ring seal is a mirror surface, the material of the static ring at the contact surface is silicon carbide, and the material of the heating area at the contact surface is graphite. The electric heating tube is connected to the power supply through the slider and the brush, and one end of the brush is fixedly connected to the static ring. The rotation speed of the composite structure rotary kiln is 60 rpm.

Embodiment 2

[0028] The diameter of the three heating regions is 1.5m, the thickness of the graphite layer is 100mm, and the thickness of the flexible graphite layer is 2.5mm. The contact surface of the dynamic and static ring seal is a mirror surface, and the material of the static ring at the contact surface is silicon carbide. When the composite structure rotary kiln is installed and used, it has a slope of 10°, and when the heating zone rotates, the materials are automatically driven from the low temperature zone 7 to the high temperature zone 11. The electric heating tube is connected to the power supply through the slider and the brush, and one end of the brush is fixedly connected to the static ring. The rotation speed of the composite structure rotary kiln is 30 rpm.

[0029] In the above embodiment 1-2, hydrogen chloride is passed into the composite structure rotary kiln loaded with magnesium chloride hexahydrate from the hydrogen chloride inlet 5, and is heated and dehydrated in...

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Abstract

The invention provides a preparation process of anhydrous magnesium chloride, and the preparation process comprises the following steps: introducing hydrogen chloride into a rotary kiln with a composite structure, and carrying out three-stage heating dehydration at the following heating ranges, namely, 160-220 DEG C, 180-380 DEG C and 330- 450 DEG C; and absorbing separated water with hydrogen chloride to obtain steam containing hydrogen chloride, introducing the steam containing hydrogen chloride into an integrated absorbing tower to form hydrochloric acid, and desorbing hydrochloric acid togenerate hydrogen chloride for recycling. The preparation device of anhydrous magnesium chloride is the rotary kiln with the composite structure, and is composed of alternate three heating regions and four stationary seal rings, wherein the heating regions and the stationary seal rings are combined by a static and dynamic combined form; and the three heating regions can rotate and are in a cylindrical composite structure, the composite structure is composed of a steel plate layer, a flexible graphite layer and a graphite layer, and an electric heating pipe is pre-embedded in the graphite layer. By using hydrogen chloride as a water absorbent in the preparation method, the dehydration efficiency is significantly improved, hydrogen chloride is recycled and the consumption is less; the flexible graphite layer reduces the vibration when the device operates; and the graphite layer has high corrosion resistance.

Description

technical field [0001] The invention relates to a method and equipment for preparing anhydrous magnesium chloride from magnesium chloride hexahydrate. Background technique [0002] In industrial production, magnesium chloride hexahydrate is used to prepare anhydrous magnesium chloride. There are many preparation methods, but some have high energy consumption, some have complex technological process, some have low efficiency, and lack the maturity of high efficiency and low energy consumption required by large-scale production. method. [0003] MgCl26H2O [0004] The document with the patent application No. 200410041515.2 discloses a "new process for the production of anhydrous magnesium chloride by microwave energy". Firstly, dehydration of magnesium chloride hexahydrate in the first microwave heater is carried out to obtain magnesium chloride with a water content of 1.5-2.0%, and the temperature is controlled at 100-120°C by Magnesium chloride hexahydrate is dehydrated to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F5/34
Inventor 仇晓丰
Owner NANTONG STAR GRAPHITE EQUIP CO LTD