Method for treating vanadium pentoxide wastewater and circularly utilizing resources

A technology for vanadium pentoxide and wastewater treatment, which is applied in the fields of vanadium oxide, water/sewage treatment, chemical instruments and methods, etc. It can solve problems such as difficult governance, difficult recycling, and difficult discharge standards, so as to improve resource utilization , low operating cost, and the effect of ensuring product quality

Inactive Publication Date: 2012-08-08
BOYING XIAMEN SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a kind of treatment and recycling recycling method of vanadium pentoxide production wastewater for the existing vanadium pentoxide wastewater with complex components, difficult treatment, difficult discharge up to the standard, and difficult recycling. The present invention not only Fundamentally solve the pollution problem of vanadiu

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1200 tons / day vanadium pentoxide wastewater treatment and resource recycling project.

[0036] The water quality situation of described vanadium pentoxide wastewater is as shown in table 1.

[0037] The water quality situation of table 1 vanadium pentoxide wastewater

[0038] serial number

project

measured value

serial number

project

measured value

1

Cr 6+ (mg / L)

2.4

5

pH value

7.5

2

Cd 2+ (mg / L)

0.3

6

Ammonia nitrogen (mg / L)

20.4

3

V 5+ (mg / L)

5.4

7

As 3+ (mg / L)

0.6

4

Chloride (mg / L)

901

8

SS(mg / L)

100

[0039] Step (1): Restore

[0040] Adding sulfuric acid to the vanadium pentoxide wastewater to adjust the pH value to 2-3, after mixing evenly, adding a reducing agent, ferrous sulfate, to reduce the hexavalent chromium in the wastewater to trivalent chromium;

[0041] Step (2): Preci...

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Abstract

The invention discloses a method for treating vanadium pentoxide wastewater and circularly utilizing resources, and relates to industrial wastewater treatment and cyclic utilization of resources. The method comprises the following steps of: adjusting pH in the vanadium pentoxide wastewater, adding a reducing agent and reducing to trivalent chromium; adding a precipitator into the vanadium pentoxide wastewater, and separating to sludge and supernate after reaction; filtering the supernate, adsorbing the wastewater obtained by filtration to obtain purified wastewater, pumping the purified wastewater into a low pressure reverse osmosis system, and desalting to obtain dialyzate 1 and concentrated liquid 1; pumping the concentrated liquid 1 into a high pressure reverse osmosis system to carry out high pressure reverse osmosis desalting to obtain dialyzate 2 and concentrated liquid 2, combining the dialyzate 2 and the dialyzate 1 to obtain regenerating water as water for vanadium leaching in a leaching station in production, and causing the concentrated liquid to enter an electroosmosis system; feeding the concentrated liquid 2 into the electroosmosis system through a water pump and concentrating the concentrated liquid 2, causing the generated dialyzate 3 to enter the high pressure reverse osmosis system, and continuously and circularly treating, and discharging the concentrated liquid 3 into a salting ball forming station salt water pool in production of the vanadium pentoxide as salt water.

Description

technical field [0001] The invention relates to industrial wastewater treatment and resource recycling, in particular to a wastewater treatment and resource recycling method for producing vanadium pentoxide by a low-sodium roasting-water leaching vanadium extraction method combined with reverse osmosis technology and electrodialysis technology. Background technique [0002] Alum pentoxide (V 2 o 5 ) has a wide range of uses, can be used to manufacture vanadium-iron alloy steel, decarburization, desulfurization and catalyst in the synthetic ammonia industry, is a coloring material for printing and dyeing, ceramics, corrosion inhibitors for equipment anti-corrosion in petrochemical installations, and is also a raw material for the preparation of vanadium compounds . The traditional process for producing vanadium pentoxide is: [0003] Mining → mineral processing → crushing, crushing → mixing → ball making → roasting → water leaching → sedimentation → ion exchange → precipit...

Claims

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Application Information

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IPC IPC(8): C02F9/08C01G31/02C02F1/66C02F1/70C02F1/52C02F1/28C02F1/44C02F1/469
CPCC02F9/00C02F2101/22C02F1/70C02F2101/20C02F1/52C01G31/02C02F1/4693C02F1/66C02F1/441Y02A20/124Y02A20/131
Inventor 张世文赵玉琴许雅玲李杰
Owner BOYING XIAMEN SCI & TECH
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