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Cross-flow filtration method of metal sulfate solution

A technology of metal sulfate and cross-flow filtration, which is applied in the direction of filtration separation, separation methods, chemical instruments and methods, etc., and can solve problems such as complex components, cleaning and regeneration effect of filter elements, and deterioration of filtration efficiency

Active Publication Date: 2016-08-17
CHENGDU INTERMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The metal sulfate solution actually produced in industrial production often has complex components and contains a large amount of colloidal substances. In this case, the original cross-flow filtration method will deteriorate the cleaning and regeneration effect and filtration efficiency of the filter element.

Method used

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  • Cross-flow filtration method of metal sulfate solution

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Effect test

Embodiment 1

[0021] A cobalt sulfate solution, the solid content is 20g / L, the pH value is 1-2, the Co content is 12.5g / L, the Ni content is 58g / L, SiO 2 The content is 2.1g / L. According to the method in the above specific embodiment, the cobalt sulfate solution is cross-flow filtered, wherein the filtration temperature of the cobalt sulfate solution is kept between 47-53°C, and the impurity reaction solution adopts a NaOH solution with a mass concentration of 0.5%, cross-flow The filter core in the filter 102 is specifically made of titanium aluminum alloy porous material filter core. After the first cross-flow filter runs for 24 hours, perform a deep purification regeneration according to the above steps 2 to 7, when the net liquid flux of the third cross-flow filter reaches 600kg / m 2 .h, execute step 4, when the net liquid flux of the fifth cross-flow filtration reaches 2500kg / m 2 .h, go to step 6. Through a continuous test for one month, the clear liquid flux of the titanium-aluminu...

Embodiment 2

[0023]Cobalt sulfate solution is with embodiment 1. The cobalt sulfate solution is cross-flow filtered according to the method in the above specific embodiment, wherein the filtration temperature of the cobalt sulfate solution is kept between 47-53° C. The mass ratio of the solution is 2.5:1:28, and the filter element in the cross-flow filter 102 is specifically made of titanium-aluminum alloy porous material filter element. After the first cross-flow filter runs for 24 hours, perform a deep purification regeneration according to the above steps 2 to 7, when the net liquid flux of the third cross-flow filter reaches 600kg / m 2 .h, execute step 4, when the net liquid flux of the fifth cross-flow filtration reaches 2500kg / m 2 .h, go to step 6. Through a continuous test for one month, the clear liquid flux of the titanium-aluminum alloy porous material filter element in the above-mentioned cobalt sulfate solution system can be continuously maintained at 2500kg / m 2 .h or so.

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Abstract

The invention discloses a cross flow filtration method of a metal sulfate solution, which is relatively excellent in cleaning and regeneration effect of a filter element. The cross flow filtration method comprises the following steps: injecting the metal sulfate solution to be filtered into a cross flow filtration system for achieving first cross follow filtration through a cross flow filter, continuously filling clean water into the cross flow filtration system for achieving second cross follow filtration through the cross flow filter, filling an impurity reaction liquid into the cross flow filtration system for achieving third cross follow filtration through the cross flow filter, continuously filling clean water again for achieving fourth cross follow filtration through the cross flow filter, filling a sulfuric acid water solution of which the pH value is 1-2 for achieving fifth cross follow filtration through the cross flow filter, continuously filling clean water for achieving sixth cross follow filtration through the cross flow filter, and switching into the first cross flow filtration from the sixth cross flow filtration. Substances which are not dissoluble in the sulfuric acid water solution in the residual metal sulfate solution to be filtered in the cross flow filtration system are converted into substances which are dissoluble in the sulfuric acid water solution through the impurity reaction liquid.

Description

technical field [0001] The present invention relates to a method for cross-flow filtration of metal sulfate solutions. Background technique [0002] The Chinese invention patent application document with publication number CN103111121A applied by the applicant of the present invention discloses a cross-flow filtration method capable of deep cleaning and regeneration of the filter element, which includes the following steps (see pages 6-7 of the specification, examples ): injecting the sulfate solution to be filtered into the cross-flow filtration system, making it subjected to the action of the circulation pump in the cross-flow filtration system, and being subjected to the cross-flow filter to realize the first cross-flow filtration; to the cross-flow filtration system Inject clean water to replace the sulfate solution to be filtered, make it pass through the filter channel of the filter element in the cross-flow filter under the action of the circulation pump in the cross-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D37/00
Inventor 高麟汪涛郑其灵丁先
Owner CHENGDU INTERMENT TECH