Filter cloth online circulation washing system and method of titanium dioxide water washing leaf filter

A technology of circulating washing and leaf filter, applied in chemical instruments and methods, separation methods, filtration and separation, etc., can solve the problems of poor soaking effect, long time required for hydrofluoric acid soaking, affecting production efficiency, etc. Washing time, improving titanium dioxide production efficiency, and the effect of short washing time

Active Publication Date: 2016-03-23
PANZHIHUA DONGFANG TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the volatility, corrosiveness and toxicity of hydrofluoric acid, etc., it is often used at a low concentration when used. It takes a long time to soak in low-concentration hydrofluoric acid, and the soaking effect is not good, which seriously affects production efficiency.

Method used

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  • Filter cloth online circulation washing system and method of titanium dioxide water washing leaf filter
  • Filter cloth online circulation washing system and method of titanium dioxide water washing leaf filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Use the above-mentioned online circulation washing system to wash the filter cloth of the titanium white water-washed leaf filter. The concentration of hydrofluoric acid in the washing liquid used is 3%. First, place the leaf filter on the filter cloth washing pool to ensure that the filter cloth and filter plate are placed on the In the cloth washing tank, start the hydrofluoric acid pump. When the filter cloth washing tank is filled with 1 / 2 liquid, start the vacuum pump. After the system runs for 3.6 hours, stop the pump and stop washing. The washing effect is: the clogged area of ​​the filter cloth filter hole is 0.3%.

Embodiment 2

[0026] Use the above-mentioned online circulation washing system to wash the filter cloth of the titanium white water-washed leaf filter. The concentration of hydrofluoric acid in the washing liquid used is 3%. First, place the leaf filter on the filter cloth washing pool to ensure that the filter cloth and filter plate are placed on the In the cloth washing tank, start the hydrofluoric acid pump, and when the filter cloth washing tank is filled with 2 / 3 of the liquid, start the vacuum pump, and stop the pump and wash after the system runs for 3 hours. The washing effect is: the clogging area of ​​the filter cloth filter hole is 0.2%.

Embodiment 3

[0028] Soaking and washing, the concentration of hydrofluoric acid in the washing liquid is 3%, the filter cloth and filter plate of the leaf filter are soaked in the hydrofluoric acid washing pool for 5.5 hours and then taken out. The washing effect is: the blocked area of ​​the filter cloth filter hole is 0.4%.

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PUM

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Abstract

The invention discloses a filter cloth online circulation washing system and method of a titanium dioxide water washing leaf filter. The system comprises a hydrofluoric acid storage tank, a filter cloth washing tank, and a gas-liquid separator; the bottom of the hydrofluoric acid storage tank is provided with a liquid sealed groove; the material outlet of the hydrofluoric acid storage tank is connected to the liquid inlet of the filter cloth washing tank, a hydrofluoric acid pump is arranged between the hydrofluoric acid storage tank and the filter cloth washing tank, the upper part of the filter cloth washing tank is provided with a liquid overflow opening, the liquid overflow opening is connected to the hydrofluoric acid storage tank, a leaf filtering machine is arranged in the filter cloth washing tank, the gas outlet of the leaf filtering machine is connected to the gas-liquid separator, the gas outlet of the gas-liquid separator is connected to a vacuum pump, and the liquid outlet of the gas-liquid separator is connected to a liquid outlet pipe, which is inserted to the bottom of the liquid sealed groove in the hydrofluoric acid storage tank. The washing time of filter cloth is short, the washing efficiency is high, the water washing of titanium dioxide can be carried out successfully, the production efficiency of titanium dioxide is improved, at the same time, the hydrofluoric acid washing liquid can be repeatedly used, the loss of hydrofluoric acid washing liquid is avoided, the consumption of hydrofluoric acid is reduced, and the pollution to the environment is reduced.

Description

technical field [0001] The invention relates to an online cycle washing system and method for filter cloth of a titanium white water-washing leaf filter, belonging to the technical field of titanium dioxide production. Background technique [0002] The purpose of washing titanium dioxide is to wash away Fe in metatitanic acid 2+ , generally using a vacuum leaf filter. During the washing process of the vacuum leaf filter, there will always be a small amount of metatitanic acid colloidal particles blocking the filter cloth holes of the leaf filter, affecting the washing effect. With the prolongation of the use time, more and more filter cloth holes are blocked. At the same time, the fiber loses its elasticity after aging and makes the filter cloth more likely to be blocked by material particles. After the filter cloth is blocked, the production efficiency and quality are seriously affected, so it needs to be replaced regularly Or wash the filter cloth of the leaf filter. Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D35/16
CPCB01D35/16
Inventor 杨金源王荣凯彭磊胡云友王胜华陈川
Owner PANZHIHUA DONGFANG TITANIUM IND
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