Process for purifying and treating vanadium-containing wastewater in advanced manner and process for recycling vanadium and chromium

A treatment process and deep purification technology, applied in the direction of metallurgical wastewater treatment, multi-stage water treatment, neutralized water/sewage treatment, etc., can solve the problems of poor biodegradability, difficulty in harmless and resourceful recycling, and treatment effects Limited and other issues

Active Publication Date: 2016-07-13
HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorption method and the preparation of adsorbents are current research hotspots. It has the advantages of relatively simple operation and low treatment cost, but researchers need to make further breakthroughs in terms of treatment effect and adsorption capacity.
[0013] Due to the com...

Method used

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  • Process for purifying and treating vanadium-containing wastewater in advanced manner and process for recycling vanadium and chromium
  • Process for purifying and treating vanadium-containing wastewater in advanced manner and process for recycling vanadium and chromium
  • Process for purifying and treating vanadium-containing wastewater in advanced manner and process for recycling vanadium and chromium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The wastewater collected is vanadium-containing wastewater from a vanadium enterprise in Huaihua, Hunan Province, that is, complex wastewater containing vanadium, chromium and other impurity metal ions, and ammonium roots. The pH of the wastewater is about 2.0. The main components of the wastewater are shown in the table below.

[0075] Composition of acidic vanadium-containing wastewater (mg / L)

[0076]

[0077] The technical solutions and processing methods are as follows:

[0078] 1. Removal of impurity metals: After the complex acidic vanadium-containing wastewater is removed through the grid to remove particulate impurities, the concentration of heavy metal ions in the wastewater is initially detected, and the pH is adjusted to 4.0, and then enters the CH-90 resin adsorption device for adsorption, and the influent flow rate is 5BV / h (where BV represents the volume of the resin, the same below), when the volume of the effluent is more than 20 times the volume of...

Embodiment 2

[0085] The waste water taken is the vanadium-containing waste water of the first vanadium alloy production enterprise in Jishou, Hunan Province. The pH of the waste water is about 6.0, and the waste water is free of chromium and ammonium radicals. Compared with Example 1, it is simpler. Purpose of treatment: advanced treatment of wastewater and recovery of vanadium, because the concentration of vanadium is higher than that of other impurity metal ions, and there is no need to separate vanadium and chromium, the above steps 1 and 2 are reversed to improve the recovery rate of vanadium, and other steps remain unchanged.

[0086] Composition of vanadium-containing wastewater (mg / L)

[0087] V

Cu

Cd

Zn

Mg

Ca

Ni

Fe 3+

Al 3+

80-100

30-35

25-30

20-30

30-50

50-60

30-40

55

60

[0088] The technical solutions and processing methods are as follows:

[0089] 1. Adsorption and removal of vanadium: Was...

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PUM

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Abstract

The invention relates to a process for purifying and treating vanadium-containing wastewater in an advanced manner and a process for recycling vanadium and chromium, and belongs to the field of sewage treatment.The process for purifying and treating the vanadium-containing wastewater in the advanced manner includes regulating a pH (potential of hydrogen) value of the vanadium-containing wastewater until the pH value reaches 4-6, sequentially adsorbing the vanadium-containing wastewater by the aid of resin A and resin B which are used as adsorption media; draining tail liquid which reaches standards and is obtained after the vanadium-containing wastewater is adsorbed.The resin A is chelating ion exchange resin; the resin B is macroporous weakly basic anion exchange resin with polyamine.The processes have the advantages that the process for purifying and treating the vanadium-containing wastewater is a novel, efficient and low-cost technology for treating heavy metal wastewater, the requirement on harmlessness and resource recovery (valuable heavy metal recycling) of the vanadium-containing wastewater and the requirement on water recycling and reusing can be simultaneously met, the processes are novel environment-friendly emission reduction and resource recycling technologies, 'cleaner production' standards implemented for vanadium metallurgy and vanadium application industries can be improved, and the processes have obvious economic and social benefits.

Description

technical field [0001] The invention relates to a process for advanced purification treatment of vanadium-containing wastewater and recovery of vanadium and chromium, which belongs to the field of sewage treatment. Background technique [0002] Vanadium is a rare metal and one of the country's important strategic resources. At present, China mainly extracts vanadium products from stone coal, vanadium slag, etc., and most of them use sodium roasting, calcification roasting and wet extraction processes, because the raw materials contain many toxic associated elements, such as chromium, arsenic, and mercury associated with stone coal mines. , lead, cadmium, etc. These toxic substances will eventually enter the wastewater with the smelting process. If they are not treated, they will pose a greater threat to the surrounding water environment. At the same time, vanadium-containing wastewater mainly exists in the form of V (V), and among various vanadium ions, V (V) is the most to...

Claims

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Application Information

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IPC IPC(8): C02F9/04B01J45/00B01J41/12B01J49/00C22B34/22C22B7/00C02F101/20C02F101/22C02F103/16B01J49/60
CPCB01J41/12B01J45/00C02F1/001C02F1/42C02F1/66C02F9/00C02F2101/20C02F2101/22C02F2103/16C02F2301/08C22B7/00C22B34/22
Inventor 贺前锋赵建成言海燕宋乐山陈亚利姚咏歌赵迪阙雄杰刘杰蔡群欢
Owner HUNAN YONKER ENVIRONMENTAL PROTECTION RES INST
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