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Production method for drying anhydrous sodium sulfate using fluidized bed

A technology of fluidized bed drying and anhydrous sodium sulfate, which is applied in the direction of alkali metal sulfite/sulfate dehydration, etc., can solve the problems of high tail gas discharge temperature, difficult packaging process, high product temperature, etc., and achieve energy consumption reduction, post-processing The effect of smooth packaging and low product temperature

Inactive Publication Date: 2009-03-11
NAFINE CHEMICAL INDUSTRY GROUP CO LTD +1
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  • Application Information

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Problems solved by technology

[0003] The present invention provides a kind of drying anhydrous by fluidized bed in order to solve the problems such as high exhaust gas discharge temperature that exists in drying sodium sulfate (yuanming powder) in the prior art, causing large energy consumption, high product temperature, and causing difficulties to the packaging process. The production method of sodium sulfate

Method used

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  • Production method for drying anhydrous sodium sulfate using fluidized bed
  • Production method for drying anhydrous sodium sulfate using fluidized bed
  • Production method for drying anhydrous sodium sulfate using fluidized bed

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Embodiment 1, as attached Figure 4 Shown, utilize fluidized bed to dry the production method of anhydrous sodium sulfate, the sodium sulfate wet material containing moisture 1.6% that separates out from separating machine, enter fluidized bed drier through feeder and dry, and dry hot air is controlled at 35 ℃ ~ 185 ℃, then pack the dry material collected from the discharge port and the cyclone separator to obtain the anhydrous sodium sulfate product.

[0017] The product test result is: Na 2 SO 4 : 99.6%, moisture: 0.02%.

Embodiment 2

[0018] Example 2: The sodium sulfate wet material with a moisture content of 2.4% separated from the separation machine enters the fluidized bed dryer through the feeder for drying, and the drying hot air is controlled at 35 ° C to 185 ° C, and then the material is discharged from the discharge port Pack the dry material collected with the cyclone separator to obtain the anhydrous sodium sulfate product.

[0019] The product test result is: Na 2 SO 4 : 99.4%, moisture: 0.04%.

Embodiment 3

[0020] Example 3: The sodium sulfate wet material with a moisture content of 3.8% separated from the separation machine enters the fluidized bed dryer through a feeder for drying, and the drying hot air is controlled at 35°C to 185°C, and then the material is discharged from the discharge port Pack the dry material collected with the cyclone separator to obtain the anhydrous sodium sulfate product.

[0021] The product test result is: Na 2 SO 4 : 99.2%, moisture: 0.05%.

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Abstract

The invention relates to a method for drying anhydrous sodium sulfate (Glauber's Salt), in particular to a production method for drying the anhydrous sodium sulfate by utilizing a fluidized bed. The invention solves the problems that tail gas has high exhaust temperature to cause large energy consumption, high temperature of a product, difficult packaging procedure and the like in the prior art for drying the sodium sulfate. The method uses the fluidized bed as a drying device; a wet sodium sulfate material passes through a feeding device, enters the fluidized bed and is dried; the temperature for drying hot blast is controlled between 35 and 185 DEG C; and a material is discharged from a discharge port and a dry material is collected from a cyclone separator to obtain the anhydrous sodium sulfate. With the method, the moisture of the product meets GB / T6009-2003 index; the product has high quality, low temperature and smooth subsequent packaging and greatly reduces energy consumption; and the method has the characteristics of simple process, convenient operation, low cost and the like.

Description

technical field [0001] The invention relates to a drying method of anhydrous sodium sulfate (yuanming powder), in particular to a production method of utilizing a fluidized bed to dry anhydrous sodium sulfate. Background technique [0002] At present, the drying methods of anhydrous sodium sulfate (yuanmingfen) all adopt airflow drying tubes, and the drying time is short. The drying method has the following disadvantages: the exhaust gas discharge temperature is high, resulting in large energy consumption, high product temperature, and difficulties in the packaging process. Contents of the invention [0003] The present invention provides a kind of drying anhydrous by fluidized bed in order to solve the problems such as high exhaust gas discharge temperature that exists in drying sodium sulfate (yuanming powder) in the prior art, causing large energy consumption, high product temperature, and causing difficulties to the packaging process. The production method of sodium su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/18
Inventor 朱安乐徐法洪吴林茂曹涑旺宋翠华贺春宝陆长青赵毅鲁成海
Owner NAFINE CHEMICAL INDUSTRY GROUP CO LTD
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