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Method for lowering inorganic ultrafine powder slurry moisture content by adding rotary drum pressurizing type filtering machine

A technology of inorganic ultra-fine powder and pressure filtration, which is applied in the direction of magnesium hydroxide, etc., can solve the problems of large evaporation water, large equipment volume, and increased human supply, and achieve large evaporation water, large equipment volume, and energy saving.

Inactive Publication Date: 2013-03-20
TIANHUA INST OF CHEM MACHINERY & AUTOMATION +2
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Problems solved by technology

[0006] ①The original inorganic ultrafine powder production process uses a plate and frame filter to produce cakes intermittently, and it is necessary to increase manpower for auxiliary operations
Therefore, in the case of the same output, the volume of the equipment is large and the cost is high; at the same time, the amount of evaporated water is large and the energy consumption is high

Method used

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  • Method for lowering inorganic ultrafine powder slurry moisture content by adding rotary drum pressurizing type filtering machine

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Embodiment Construction

[0020] The inorganic superfine powder slurry referred to in the present invention is magnesium hydroxide slurry; The added rotary drum pressurized filter system is a rotary drum pressurized filter, a mother liquor pump, a filtrate pump, a compressed air buffer tank and a filtrate collection tank, wherein : The mother liquid pump and the filtrate pump are mud pumps, or slurry pumps, or screw pumps, or hose pumps, and pumps for transporting solid particles; drum pressurized filter (patent number: ZL 2009 2 0144208.5 ) is the patented equipment of Tianhua Chemical Machinery and Automation Research and Design Institute.

[0021] Below in conjunction with accompanying drawing, technological process of the present invention is further described again:

[0022] Step 1: The magnesium hydroxide slurry enters the filter unit chamber of the pressure filter 2 after being pressurized by the mother liquid pump 1, and the pressure filter 2 rotates in the manner of frequency conversion and sp...

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Abstract

The invention proposes a method for lowering energy consumption for drying inorganic ultrafine powder slurry by adding a rotary drum pressurizing type filtering machine. A pressurizing rotary drum filtering machine system is added in front of a conventional paddle dryer, and the inorganic ultrafine powder slurry moisture content is greatly reduced by pressure filtration. The method is characterized by continuous operation, saved energy, lowered consumption, reduced tail gas discharge quantity, and conformity with the national industrial policy of energy conservation and emission reduction.

Description

technical field [0001] The invention relates to the technical field of energy-saving and consumption-reducing inorganic powder filtration and drying, and specifically relates to a method for filtering inorganic ultrafine powder slurry and two-stage combined drying, which is used to reduce the moisture content of the inorganic ultrafine powder slurry. Background technique [0002] The original inorganic ultrafine powder production process generally adopts plate and frame filtration, and then adopts a combined drying technology consisting of paddle pre-drying and micro-powder drying. Its working process is: [0003] Filter the inorganic ultrafine powder slurry with a solid content of about 10% through the plate frame to a filter cake with a moisture content of about 50%, and then continuously and evenly enter the paddle dryer. Under the indirect heating of saturated steam, the water evaporates rapidly. After pre-drying, the moisture content of the material is reduced to 15-2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F5/14
Inventor 赵旭宋云华张麦奎陈建铭张万尧黄帅
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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