Composite filter pipe manufactured by expanded perlite and zeolite as main raw materials and manufacture method of composite filter pipe

A technology of expanded perlite, the main raw material, applied in the field of filtration, which can solve the problems of reduced filtration flux and loss, and achieve the effects of slowing down the reduction of filtration flux, long working hours, and saving energy consumption

Inactive Publication Date: 2013-04-10
XINYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]3. The expanded perlite filter aid is generally added to the material to be filtered first, stirred thoroughly, and then centrifugally filtered (drum filter) or press-filtered ( Plate and frame filter), there is a certain loss in the use process. With the extension of the filtration time, the density of the filter cake increases and the filtration flux decreases.
[0008] my country is rich in mineral resources of perlite and natural zeolite, and has been applied in the fields of petroleum, chemical industry, light industry, preparation, water treatment, etc., but expanded perlite and natural zeolite as raw materials for the preparation of composite filter has not yet been reported in the literature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Mix expanded perlite and natural zeolite powder at a ratio of 1:4 (by weight), and grind to 325 mesh to obtain the base material.

[0036] 2. Add 1% starch, 2% borax, and 10% bentonite to the base material, mix thoroughly, add an appropriate amount of water, and mix evenly to obtain a semi-dry mixture.

[0037] 3. First coat the inner wall of the Φ50×200 separable rigid pipe mold with a release agent, then put the obtained semi-dry mixture into it, place it on a centrifugal molding machine, control the speed at 1200 rpm, and centrifuge for 50 minutes to obtain a filter tube green body.

[0038] 4. Remove the rigid tube mold from the centrifuge, open the tube mold, and remove the green filter tube.

[0039] 5. Move the green filter tube to the temperature-programmed furnace, heat up to 100°C for 60 minutes at a heating rate of 5°C / min, hold for 30 minutes at 500°C, and hold for 30 minutes at 800°C, and then naturally cool in the furnace to obtain expanded perlite / ...

Embodiment 2

[0041] 1. Mix expanded perlite and natural zeolite powder at a ratio of 1:5 (weight ratio), and grind to 325 mesh to obtain base material.

[0042] 2. Add 1.5% starch, 1.5% borax, and 5% bentonite to the base material, mix thoroughly, add an appropriate amount of water, and stir evenly to obtain a semi-dry mixture.

[0043] 3. First coat the inner wall of the Φ50×200 separable rigid pipe mold with a release agent, then put the obtained semi-dry mixture into it, place it on a centrifugal molding machine, control the speed at 1500 rpm, and centrifuge for 30 minutes to obtain a filter tube green body.

[0044] 4. Remove the rigid tube mold from the centrifuge, open the tube mold, and remove the green filter tube.

[0045]5. Move the green filter tube to the temperature-programmed furnace, heat up to 120°C for 60 minutes at a heating rate of 5°C / min, keep at 600°C for 30 minutes, and hold at 850°C for 30 minutes. After natural cooling with the furnace, the expanded perlite is obt...

Embodiment 3

[0047] 1. Mix expanded perlite and natural zeolite powder at a ratio of 1:6 (weight ratio), and grind to 325 mesh to obtain base material.

[0048] 2. Add 2% starch, 1% borax, and 0.5% sodium oxide to the base material, then dissolve 5g of polyvinyl alcohol with an appropriate amount of hot water, add it, and stir evenly to obtain a semi-dry mixture.

[0049] 3. First coat the inner wall of the Φ50×200 separable rigid pipe mold with a release agent, then put the obtained semi-dry mixture into it, place it on a centrifugal molding machine, control the speed at 1400 rpm, and centrifuge for 40 minutes to obtain a filter tube green body.

[0050] 4. Remove the rigid tube mold from the centrifuge, open the tube mold, and remove the green filter tube.

[0051] 5. Move the green filter tube to the temperature-programmed furnace, heat up to 120°C for 60 minutes at a heating rate of 5°C / min, hold for 30 minutes at 700°C, and hold for 30 minutes at 900°C, and then naturally cool in the...

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Abstract

The invention discloses a composite filter pipe manufactured by expanded perlite and zeolite as main raw materials and a manufacture method of the composite filter pipe, in particular relates to a composite filter pipe for material filtration or wastewater treatment in the fields of environment protection, food, light industry, medicine, chemical engineering and the like, and a manufacture methodof the composite filter pipe. The manufacture method comprises the steps of: mixing the expanded perlite with the natural zeolite according to a certain proportion, grinding until reaching 200-325mu to obtain a base material; adding a pore-forming agent, a melt-assisting agent and a water-soluble binding agent in the base material, and fully mixing to prepare a semi-dry mixture; loading the semi-dry mixture into a separable rigid pipe die, and centrifugally forming on a centrifugal forming machine to form a filter pipe green body; and demoulding the green body and then sintering, and cooling to obtain the composite filter pipe manufactured by the expanded perlite and the zeolite. The invention has the characteristics of simple manufacture process, low manufacture cost, high filter pipe strength, pressure resistance, high temperature resistance, wide use range, long continuous working time, easiness in cleaning and capability of repeated use; and the expanded perlite and the zeolite are used as main raw materials.

Description

technical field [0001] The invention relates to the field of filtration, in particular to a composite filter tube with expanded perlite and zeolite as main raw materials for material filtration or wastewater treatment in the fields of environmental protection, food, light industry, medicine, chemical industry and the like and a preparation method thereof. Background technique [0002] Expanded perlite is a kind of porous white granular bulk material made of perlite ore preheated and roasted at high temperature. It can be used as filter material after crushing. As a traditional inorganic filter material, expanded perlite has been widely used in petroleum, chemical industry, light industry, preparation, water treatment and other fields. Natural zeolite is a kind of hydrous frame-like aluminosilicate mineral. Its internal structure is a three-dimensional space frame structure composed of silicon-oxygen tetrahedron and aluminum-oxygen tetrahedron. Holes and channels connected t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D39/20
Inventor 刘鹏金紫荷
Owner XINYANG NORMAL UNIVERSITY
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