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Aluminium hydroxide drying system and drying method thereof

A technology of aluminum hydroxide and drying system, applied in drying, drying machine, drying solid materials, etc., can solve the problems of take away, complicated electrical system and automatic control system, energy loss and other problems

Inactive Publication Date: 2017-03-22
中铝集团山西交口兴华科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional aluminum hydroxide drying device generally uses a spin flash dryer or a paddle dryer to dry aluminum hydroxide. However, in order to ensure that the moisture of the product meets the standard, the temperature of the evacuated air is high, resulting in the discharge of The air takes away a lot of heat energy, resulting in loss of energy consumption
[0004] The traditional aluminum hydroxide drying system includes feeding, dispersing, staying, and dust removal. There are many equipments used in the system, and the process pipe network system, electrical system and automatic control system are all complicated. The system has poor safety and stability, high failure rate, and system leakage points Many, the on-site working environment is harsh; due to the complexity of the system, it occupies a large area and requires a large one-time investment

Method used

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  • Aluminium hydroxide drying system and drying method thereof

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Effect test

Embodiment 1

[0025] A drying system for aluminum hydroxide, comprising screw feeder 1, Venturi dryer 2, primary preheating cyclone separator 3, secondary preheating cyclone separator 4, fluidized cooler 5, bag collection Dust collector 7, dust collection fan 8, finished product storage bin 9, electric dust collector 11, induced draft fan 12;

[0026] Among them, the screw feeder 1 is connected with the Venturi dryer 2 and feeds it; the flue gas drawn from the top of the secondary preheating cyclone separator 4 is connected to the lower part of the Venturi dryer 2 with a pipeline, and is dried by the Venturi The top of the device 2 is connected to the top of the first-stage preheating cyclone separator 3 through a pipeline; another branch of the lower outlet pipeline of the first-stage preheating cyclone separator 3 is connected to a fluidized cooler 5, and the fluidized The lower outlet of the cooler 5 is piped into the finished product storage bin 9; the first-stage preheating cyclone sep...

Embodiment 2

[0029] A method for drying aluminum hydroxide using a drying system of the present invention, comprising the following steps:

[0030] The wet aluminum hydroxide material is supplied to the Venturi dryer 2 through the screw feeder 1; the flue gas at about 300-400 °C drawn from the secondary preheating cyclone separator 4 passes through the Venturi dryer 2, and the flue gas The gas is mixed with the wet aluminum hydroxide material to transfer heat, so that the wet aluminum hydroxide material can be heated rapidly to 120-180 ° C, and the attached water in the wet aluminum hydroxide material is removed, and the venturi dryer 2 is transported to the first-stage preheating cyclone separation Carry out gas-solid separation in device 3;

[0031] The power of the gas flow in the primary preheating cyclone separator 3 comes from the induced draft fan 12, which makes it work under negative pressure. 12 is discharged through the chimney 13;

[0032] The dried aluminum hydroxide is conn...

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Abstract

The invention relates to an aluminium hydroxide drying system and a drying method thereof. The method comprises the steps that wet aluminium hydroxide is dried through a Venturi drier and a second-stage preheating cyclone separator from a gaseous suspension roaster; then, after being cooled through a fluidizing cooler, a part of dry aluminium hydroxide enters a storage bin; a bag type dust collector and an electrical dust collector are utilized at the same time to recycle solids in the gas; and the other part of dry aluminium hydroxide enters a roasting main furnace through a second-stage preheating cyclone separator to be roasted, and the roasted dry aluminium hydroxide enters a third-stage preheating cyclone separator to be subjected to solid-gas separation. According to the aluminium hydroxide drying system and the drying method thereof, hot flue gas generated from roasting is utilized, so that compared with a traditional drying technology, the drying method is low in investment and is more energy-saving.

Description

technical field [0001] The invention relates to an aluminum hydroxide drying system and a drying method thereof. Background technique [0002] Aluminum hydroxide is the basic raw material necessary for the production of aluminum fluoride in the electrolytic aluminum industry. The content is less than 0.1% before it can be used for production. [0003] The traditional aluminum hydroxide drying device generally uses a spin flash dryer or a paddle dryer to dry aluminum hydroxide. However, in order to ensure that the moisture of the product meets the standard, the temperature of the evacuated air is high, resulting in the discharge of The air takes away a lot of heat energy, causing energy loss. [0004] The traditional aluminum hydroxide drying system includes feeding, dispersing, staying, and dust removal. There are many equipments used in the system, and the process pipe network system, electrical system and automatic control system are all complicated. The system has poor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B17/10F26B21/14F26B25/00
CPCF26B17/10F26B21/14F26B25/00F26B25/002
Inventor 张强王学诗侯鑫
Owner 中铝集团山西交口兴华科技股份有限公司
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