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Method for treating waste brine containing vanadium, chromium and titanium

A treatment method and technology of vanadium-chromium-titanium, applied in water/sewage treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of inability to directly apply ion membrane caustic soda production, high cost, environmental pollution, etc. problem, to achieve better water purification effect, good flocculation effect, good flocculation and sedimentation effect

Active Publication Date: 2021-03-16
PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The treatment methods of the above two enterprises are extensive, costly, and pollute the environment
[0003] In the past two years, the above waste brine has been treated by environmental protection companies to produce relatively good quality brine or industrial salt, but the content of titanium, vanadium and chromium is still high (The content of titanium in brine is 0.5-100ppm, the content of vanadium is 0.5-100ppm, and the content of chromium is 0.5-100ppm), which cannot be directly applied to the production of ion-exchange membrane caustic soda

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Waste saline treatment of vanadium-containing chromium titanium, including the steps of:

[0026] S1: Removal saline containing vanadium chromium titanium, the amount of titanium in waste brine is 100 ppm, the vanadium content is 100 ppm, the chromium content is 100 ppm; iron chloride and ferric chloride, stirred into waste saline, stir evenly, and initially Liquid; in the initial treatment 3+ The concentration is 0.2g / l, Fe 2+ The concentration is 0.2 g / L;

[0027] S2: The pH value of the initial treatment liquid was adjusted to 8 with a concentration of 1 mol / L, and the pellets were depreciated at room temperature; then the retained solution was filtered by filtration with a pore diameter of 100 nm mesh. Delittate, clean salt water.

Embodiment 2

[0029] Waste saline treatment of vanadium-containing chromium titanium, including the steps of:

[0030] S1: Removal saline containing vanadium chromium titanium, the amount of titanium in waste brine was 1 ppm, the vanadium content was 10 ppm, the chromium content was 100 ppm; iron chloride and iron sulfate were added to waste saline, and then chloride and sulfuric acid were added. Subride, stir well, initially treated; in the initial treatment 3+ The concentration is 0.2g / l, Fe 2+ The concentration is 0.1 g / L;

[0031] S2: The pH value of the initial treatment liquid was adjusted to 9 with a concentration of 1 mol / L and sodium hydroxide, and the precipitation was deprecated at room temperature; then the hydrate-free solution was filtered by the odd solution with a pore diameter of 1 μm. Delittate, clean salt water.

Embodiment 3

[0033] Waste saline treatment of vanadium-containing chromium titanium, including the steps of:

[0034] S1: Removal saline containing vanadium chromium titanium, the amount of titanium in waste brine is 10 ppm, the vanadium content is 1 ppm, the chromium content is 100 ppm; iron nitrate is added to waste saline, then add brominated ferrite, stir well, and initially Liquid; in the initial treatment 3+ The concentration is 0.1g / l, Fe 2+ The concentration is 0.1 g / L;

[0035] S2: The pH of the initial treatment liquid is adjusted to 6 with a concentration of 1 mol / L, and the pellets are depreciated at room temperature; then filtrate filtration of the stationary solution with a pore diameter of 50 nm filter. Delittate, clean salt water.

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Abstract

The invention discloses a treatment method of waste brine containing vanadium, chromium and titanium. During treatment, a ferric salt is firstly added into the wastewater, then vanadium, chromium, titanium and the like in the solution are precipitated by adjusting the pH value of the solution, and finally the wastewater is removed through filtration. According to the method, ferric salt is added into the waste brine, the content of vanadium, chromium and titanium in the wastewater can be remarkably reduced through precipitation reaction and flocculation, and the content of titanium, vanadium and chromium in the purified brine can be lower than 20 ppb, so that the purified brine can be used for ionic membrane caustic soda production, and the waste brine produced by production enterprises ofvanadium, titanium and the like is fully utilized; green environmental protection is achieved.

Description

Technical field [0001] The present invention belongs to the field of wastewater treatment, and more particularly to a waste saline treatment of vanadium-containing chromium titanium. Background technique [0002] Vanadium production enterprises produce a large amount of vanadium-containing titanium-containing chromium waste brine, before the addition of ferrous sulfate, then pressurized to give solid waste emissions. The titanium production enterprise produces a large number of titanium-containing-containing-containing-containing-containing-containing-chlorinated waste brine. Previously, this waste brine mainly removes most of the freeenchloric acid, then adding lime to adjust pH, then add sodium sodium sulfite to completely remove the chlorine, and finally press filtration Get solid waste to discharge. The treatment method of the above two companies is a rough, high cost, and polluted environment. [0003] In the past two years, the above-mentioned waste brine can produce a rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/10C02F101/22
CPCC02F9/00C02F1/66C02F1/001C02F1/5245C02F2101/22C02F2101/10Y02P10/20
Inventor 张芋尹文刚王永明罗明松陈泓宇
Owner PANZHIHUA STEEL ENTERPRISES XINYU CHEM
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