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A ceramic filter element, its preparation method and application

A ceramic filter element and filter element technology, applied in the field of water purification, can solve the problems of long sintering time of green body, increased energy consumption, and increased process flow, etc.

Active Publication Date: 2021-09-14
BEYCLEAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above traditional preparation methods: (1) the addition of pore-forming agents affects the precision of ceramics; (2) the use of ball mills for grinding increases the process flow; The sintering time of the billet is long, the energy consumption increases, and the strength of the filter element is not uniform, and the product defect rate is high; (4) The final product cannot effectively remove heavy metal pollution such as chromium (hexavalent), aluminum, arsenic, and antimony

Method used

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  • A ceramic filter element, its preparation method and application
  • A ceramic filter element, its preparation method and application

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Embodiment 1

[0055] In this embodiment, a method for preparing a ceramic filter element is provided, and the method for preparing a ceramic filter element includes the following steps:

[0056] (1) 80 parts by weight of 200 mesh diatomite, 5 parts by weight of silver-loaded titanium dioxide, 5 parts by weight of titanium dioxide and 10 parts by weight of Na 2 O 3SiO 2 Mix under stirring for 10 minutes, and then carry out carbon dioxide air-curing molding under the conditions of carbon dioxide purity of 99% and blowing pressure of 0.5 MPa to obtain a green filter element;

[0057] (2) Divide the filter element green body obtained in step (1) into six sections for sintering according to the sintering temperature. In the first section, the sintering temperature is raised from 25°C to 110°C at a heating rate of 1°C / min, and kept for 2 hours. In the first stage, the sintering temperature is raised from 110°C to 350°C at a rate of 1°C / min, and held for 1 hour; in the third stage, the sintering ...

Embodiment 2

[0059] (1) 70 parts by weight of 100 mesh diatomite, 10 parts by weight of silver-loaded titanium dioxide, 5 parts by weight of titanium dioxide and 15 parts by weight of Na 2 O SiO 2 Mix under stirring for 10 minutes, and then carry out carbon dioxide air-hardening method under the conditions of carbon dioxide purity of 90% and blowing pressure of 1 MPa to obtain a green filter element;

[0060] (2) Divide the filter element green body obtained in step (1) into six sections for sintering according to the sintering temperature. In the first section, the sintering temperature is raised from 25°C to 110°C at a heating rate of 5°C / min, and kept for 2 hours. In the first stage, the sintering temperature was raised from 110°C to 350°C at a rate of 5°C / min, and held for 2 hours; in the third stage, the sintering temperature was raised from 350°C to 780°C at a rate of 5°C / min, and held for 2 hours The first stage raises the sintering temperature from 780°C to 1100°C at a heating rat...

Embodiment 3

[0062] (1) 70 parts by weight of 200 mesh diatomite, 10 parts by weight of silver-loaded titanium dioxide, 5 parts by weight of titanium dioxide and 15 parts by weight of 3Na 2 O SiO 2 Mix under stirring for 10 minutes, and then carry out carbon dioxide air-curing molding under the conditions of carbon dioxide purity of 60% and blowing pressure of 0.1 MPa to obtain a green filter element;

[0063] (2) Divide the filter element green body obtained in step (1) into six sections for sintering according to the sintering temperature. In the first section, the sintering temperature is raised from 25°C to 110°C at a heating rate of 15°C / min, and kept for 2 hours. The first stage raises the sintering temperature from 110°C to 350°C at a heating rate of 15°C / min, and keeps it for 1 hour. The first stage raises the sintering temperature from 780°C to 1100°C at a heating rate of 15°C / min, and keeps it for 5 hours. The sintering temperature was lowered from 500°C to 80°C at a heating ra...

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Abstract

The invention discloses a ceramic filter element, its preparation method and application. The preparation method includes sintering the filter element green body. During the sintering process, the sintering temperature is divided into 3-6 sections. The ceramic filter element prepared by the invention has mechanical High strength, good filtering effect, no heavy metal pollution, high yield, low cost, and short process time, 20%-30% less time than traditional process, suitable for water quality treatment.

Description

technical field [0001] The invention belongs to the field of water purification and relates to a ceramic filter element, its preparation method and application. Background technique [0002] Ceramic filter elements have unique functions such as acid and alkali resistance, high temperature resistance, and corrosion resistance, and are widely used in the field of water treatment. It has the following characteristics: light weight, high porosity, long service life, easy to clean and regenerate; with good condition and high filtration accuracy, it is an environmentally friendly water quality filter material. [0003] CN107158805A discloses a multifunctional composite ceramic filter element and a preparation method thereof. The ceramic powder, adhesive, organic pore-forming agent, etc. are evenly stirred, and the slurry is left to age for 24 hours, then grouted, demoulded, and dried. Carry out sintering at last, cool, obtain ceramic filter element; CN107089836A discloses a kind ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/14C04B35/622C04B35/626B01D39/20
CPCB01D39/2068C04B35/14C04B35/622C04B35/62605C04B2235/3232C04B2235/408C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/661
Inventor 苏发兴李延涛苏志波陈柔羲苏清龙叶锦华
Owner BEYCLEAN ENVIRONMENTAL PROTECTION TECH
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