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Process for refining water glass by precise minipore filter

A technology of microporous filtration and water glass, applied in the direction of filtration separation, separation method, silicate, etc., can solve the problems of pre-coating and unloading the filter cake, and achieve long service life, high filtration efficiency and high efficiency. Effect

Inactive Publication Date: 2004-03-17
ZHEJIANG DONGOU FILTERING MASCH MFG CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

Its disadvantages: First, because the pore size of the filter cloth or screen is larger than that of the filter aid particles, many fine diatomites will leak through for a long time after the pre-coating is started, so it takes a long time to circulate The second is that the filter cloth or wire mesh is a flexible medium, and the simple method of blowing back with compressed gas cannot be used when unloading the filter cake. When the net is used as the medium, the filter cake is unloaded by vibration method
Therefore, the operation of pre-coating and unloading filter cake is more troublesome

Method used

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  • Process for refining water glass by precise minipore filter

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Embodiment Construction

[0007] Such as figure 1 Shown, the precision microporous filtration refining process of water glass of the embodiment of the present invention comprises following device: water glass stoste tank 1, pump 2,4,6,11, precision microporous filter 3, auxiliary material batching stirring tank 5, chemical cleaning Liquid circulation tank 7, compressed air storage tank 8, air purifier 9, air compressor 10, hot water tank 12, and precision microporous filter 3 are the main equipment of this process. The filter tube is the filter medium. The filter shell is cylindrical and simplified. At the bottom, there is a large slag discharge bottom cover operated by a cylinder that can remove a large volume of relatively dry filter cake at one time. This precision microporous filter The most important feature is that it can filter out the solid particle impurities of 0.5-1 micron in the water glass stock solution, and the water glass with the required high clarity can be obtained after one filtrati...

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Abstract

A process for refining water glass with precise minipore filtering includes such steps as mixing water glass with the additive containing filtering aid, filtering by precise minipore filter, squeezing filtered cake by compressed air, opening the bottom cover of filter by compressed air, discharging the cake by compressed air, and cleaning the filter by physical or chemical method. Its advantages are high clearness of water glass, high filtering efficiency, and high cleaning efficiency of filter.

Description

technical field [0001] The invention relates to a refining process for water glass, in particular to a refining process for preparing high-clarity water glass by using precision microporous filtration technology. Background technique [0002] High-clarity water glass is a very important inorganic chemical raw material. It is a highly transparent liquid containing very few suspended impurities. However, the water glass stock solution is a suspension containing a lot of suspended matter, very turbid, highly viscous, and highly adhesive. In order to ensure the quality of downstream products, the water glass stock solution must be refined. At present, the natural static precipitation method and filtration method are mainly used for refining in China. The natural static precipitation method occupies a large area, takes a long time to settle, and the production is backward, so it is difficult to obtain high-transparency water glass. The filtration metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D37/02C01B33/32
Inventor 宋显洪宋志骥
Owner ZHEJIANG DONGOU FILTERING MASCH MFG CO LTD