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Filter aid and its preparation method

A filter aid and cooling equipment technology, applied in chemical instruments and methods, other chemical processes, alkali metal compounds, etc., can solve the problems of polluting the environment, easy diffusion in the air, and potential safety hazards, so as to ensure the filtering effect and reduce the Warehousing space, the effect of saving logistics

Active Publication Date: 2019-06-04
上海同化益生纤生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Powdered filter aids have the following disadvantages: powdered filter aids are easy to diffuse in the air during feeding, affecting the health of on-site workers and polluting the environment. potential safety hazards; in addition, powdered filter aids are extremely inconvenient in storage and transportation, resulting in higher storage and transportation costs

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0018] The invention provides a preparation method of filter aid, comprising:

[0019] Step (1) Put the powdery raw material in the molding equipment, set the pressure at 2-15 bar to obtain a shaped product, and continuously transport the shaped product to the cooling device for cooling, and cool it down to room temperature.

[0020] Step (2) crushing the molded product to obtain granular or flake filter aid, the filter aid has a particle diameter of 2-8 mm.

[0021] The present invention obtains the molded product with proper compactness by setting the pressure of the molding equipment. Afterwards, the molded product is continuously transported to cooling equipment for cooling, so that the molded product can obtain a suitable hardness, so as to stably maintain its shape (that is, maintain its three-dimensional shape). If the molded product does not enter the cooling equipment continuously, it may lead to insufficient hardness of the molded product, which is easily broken and...

Embodiment 1

[0037] Step (1) Put the powdery raw material in the ring die granulator, set the pressure to 2bar, and the particle size of the raw material is 20μm. The raw material is made of diatomaceous earth to obtain a cylindrical shaped product, and the shaped product is continuously transported to Cooling in the cooling equipment, cooling to room temperature, wherein, the suction volume of the cooling equipment is about 4500m 3 / h, the wind pressure is 200mm water column height, and the cooling time is 5min;

[0038] Step (2) crush the molded product to obtain a granular filter aid, which can pass through a mesh of 8 mm × 8 mm, but cannot pass through a mesh of 5 mm × 5 mm, that is, the particle size of the filter aid is between Between 5 and 8mm.

[0039] The filter aid of this embodiment can rapidly expand and disperse within 3 minutes when it is put into water; there is no dust during actual feeding, the storage space is reduced by 50%, and the logistics, transportation and other ...

Embodiment 2

[0041] Step (1) Put the powdered raw material in a flat die granulator, set the pressure to 15bar, and the particle size of the raw material is 30μm. The raw material is diatomaceous earth to obtain a cylindrical shaped product, and the shaped product is continuously transported to Cooling in the cooling equipment, cooling to room temperature, wherein, the suction volume of the cooling equipment is about 4500m 3 / h, the wind pressure is 200mm water column height, and the cooling time is 20min;

[0042] Step (2) crush the molded product to obtain a granular filter aid, which can pass through a mesh of 6 mm × 6 mm, but not through a mesh of 3 mm × 3 mm, that is, the particle size of the filter aid is between Between 3 and 6mm.

[0043] The filter aid of this embodiment can rapidly expand and disperse within 10 minutes when it is put into water; there is no dust during actual feeding, and the storage space is reduced by 65%; logistics, transportation and other management costs a...

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Abstract

The invention discloses a preparation method for a filter aid. The preparation method comprises the following steps: (1) placing a powdery raw material in a molding device, setting pressure to be 2 to 15 bar so as to obtain a molded product, and continuously conveying the molded product to a cooling device for cooling to room temperature; and (2) crushing the molded product so as to obtain the granular or flaky filter aid with a particle size of 2 to 8 mm. The invention also provides the filter aid prepared by using the preparation method. The preparation method for the filter aid accurately controls pressure in molding process and utilizes the cooling device for continuous cooling after molding so as to prepare the filter aid with proper compactness. The filter aid produces no dust in feeding, which is beneficial for protection of human health and environment; moreover, the filter aid can rapidly expand and disperse in liquid, so original filtering effect is guaranteed.

Description

technical field [0001] The invention relates to the field of filter aids, in particular to a filter aid and a preparation method thereof. Background technique [0002] A filter aid is a substance that can improve the filtration efficiency of the filtrate. Generally speaking, in order to prevent the filter residue from accumulating too densely and make the filtration go smoothly, insoluble inert materials with different degrees of fineness are used as filter aids. However, filter aids are currently in powder form. Powdered filter aids have the following disadvantages: powdered filter aids are easy to diffuse in the air during feeding, affecting the health of on-site workers and polluting the environment. In addition, powdered filter aids are extremely inconvenient in storage and transportation, resulting in higher storage and transportation costs. Contents of the invention [0003] Aiming at the above technical problems, the present invention designs and develops a metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/28B01J20/24B01J20/14
CPCB01J20/14B01J20/24B01J20/28016B01J20/28033B01J20/3007B01J20/3021
Inventor 张楠
Owner 上海同化益生纤生物科技有限公司
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