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A chemical fiber titanium dioxide washing system and washing method

A washing method, titanium dioxide technology, applied in the direction of chemical instruments and methods, separation methods, titanium dioxide, etc., can solve the problems of not giving a water washing plan and reducing the method of permeation, so as to reduce the pressure on environmental protection and improve the product yield , the effect of increasing the resistivity

Active Publication Date: 2017-09-05
ANHUI JXTB GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This plan gives the general preparation method of titanium dioxide, but does not give a specific water washing plan, and it is difficult to obtain the method of how to reduce the filtration

Method used

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  • A chemical fiber titanium dioxide washing system and washing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The frame filter press 4 of the present embodiment is 150m 2 equipment, the volume of the first filter 13 and the second filter 14 is 200m 3 , after treatment, the slurry concentration of tank 1 is 290g / L, and the volume of modification tank 2 is 130m 3 , can be modified 100m each time 3 Slurry, (NH 4 ) 2 CO 3 The concentration is 100g / L.

[0049] Step 1. Transfer the finished surface treatment material into the treated tank 1, and control the pH at 6.5-7.

[0050] Step 2. Transfer the treated slurry to modification tank 2, feed 100m 3 , by TiO 2 The amount of mass content 0.5% is metered from ammonium salt metering tank 3 (NH 4 ) 2 CO 3 Solution 1.45m 3 , stirred for 30 minutes; then fed to the frame filter press 4 for 45 minutes, and the end pressure of the feed was 552kPa, showing that the feed volume was 21.5m 3 , The feed end pressure is generally controlled at 350-550kPa.

[0051] Step 3. Carry out forward washing and backwashing in sequence:

[0052...

Embodiment 2

[0060] The frame filter press 4 of the present embodiment is 75m 2 equipment, the volume of the first filter 13 and the second filter 14 is 200m 3 , after treatment, the slurry concentration of tank 1 is 273g / L, and the volume of modification tank 2 is 130m 3 , can be modified 100m each time 3 Slurry, (NH 4 ) 2 CO 3 The concentration is 100g / L.

[0061]Step 1. Transfer the finished surface treatment material into the treated tank 1, and control the pH at 6.8-8.0.

[0062] Step 2. Transfer the treated slurry to modification tank 2, feed 100m 3 , by TiO 2 The amount of mass content 1.0% is metered from ammonium salt metering tank 3 (NH 4 ) 2 CO 3 Solution 2.73m 3 , stirred for 30 minutes; then fed to the frame filter press 4 for 25 minutes, and the end pressure of the feed was 495kPa, showing that the feed volume was 11.8m 3 .

[0063] Step 3. Carry out forward washing and backwashing in sequence:

[0064] 1), open the solenoid valve valve of the high-salt liquid s...

Embodiment 3

[0072] The frame filter press 4 of the present embodiment is 150m 2 equipment, the volume of the first filter 13 and the second filter 14 is 200m 3 , after treatment, the slurry concentration of tank 1 is 283g / L, and the volume of modification tank 2 is 130m 3 , can be modified 100m each time 3 Slurry, (NH 4 ) 2 CO 3 The concentration is 100g / L.

[0073] Step 1. Transfer the finished surface treatment material into the treated tank 1, and control the pH at 6.8-8.5.

[0074] Step 2. Transfer the treated slurry to modification tank 2, feed 100m 3 , by TiO 2 The amount of mass content 1.0% is metered from ammonium salt metering tank 3 (NH 4 ) 2 CO 3 Solution 2.26m 3 , stirred for 30 minutes; then fed to the frame filter press 4 for 45 minutes, the end pressure of the feed was 534kPa, and the feed volume was 22.1m 3 .

[0075] Step 3. Carry out forward washing and backwashing in sequence:

[0076] 1), open the solenoid valve valve of the high-salt liquid sealing tank...

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Abstract

The invention discloses a chemical-fiber titanium dioxide washing system and a chemical-fiber titanium dioxide washing method, and belongs to the field of titanium dioxide treatment. The washing system is provided with a modification tank and an ammonium salt metering tank. A washing water treatment system is arranged on a water outlet of a frame filter press. An online conductivity meter is arranged between the frame filter press and the washing water treatment system. An electromagnetic valve is arranged on a water inlet of each pipeline in the washing water treatment system. The online conductivity meter and the electromagnetic valves cooperate with each other to control washing water to enter the corresponding pipelines in the washing water treatment system. Ammonium salt is added into treated sizing agent for modification during washing, the grain size of titanium dioxide is increased, washing and backwashing are performed, washing refers to washing by water recycled from backwashing, the backwashing refers to washing by desalted water, and washing and backwashing water flows through the filtering device to achieve sizing agent recycling. By the chemical-fiber titanium dioxide washing system and the chemical-fiber titanium dioxide washing method, titanium dioxide yield is increased, consumption of the desalted water is reduced, and energy conservation and environment protection are achieved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide treatment, in particular to a chemical fiber titanium dioxide washing system and washing method. Background technique [0002] At present, the titanium dioxide used in the chemical fiber field is mainly anatase titanium dioxide, and there are few domestic manufacturers of special titanium dioxide for chemical fiber. Use rolling mill, colloid mill, ball mill, sand mill and other tandem technologies to reduce the particle size of titanium dioxide, and then do inorganic coating modification through inorganic surface treatment. There is a very serious phenomenon of permeation, which leads to the loss of a large amount of titanium dioxide, and the yield of titanium dioxide cannot meet the requirements, which seriously pollutes the environment; at present, in order to reduce the loss of titanium dioxide, some manufacturers reduce the washing time, resulting in low resistivity of finished titani...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D25/32B01D25/12B01D36/00C01G23/047C01G23/053
CPCB01D25/12B01D25/325B01D36/00C01G23/047C01G23/053
Inventor 张本发张修臻
Owner ANHUI JXTB GRP
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