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Zero emission process of vanadium extraction wastewater

A zero-discharge, wastewater technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, inorganic chemistry, etc., can solve the problems of complex process, low treatment cost, occupation of equipment, etc., and achieve simple process operation. , the effect of improving the recovery rate and easy implementation

Inactive Publication Date: 2011-05-25
北京能泰高科环保技术有限公司
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Problems solved by technology

[0003] Common vanadium extraction wastewater treatment methods include: ferrous sulfate-lime method, which has simple equipment, large processing capacity, and good vanadium removal effect (V<0.1mg / l), but the amount of slag in the treatment process is large, and it is difficult to collect and dry. Vanadium, chromium, etc. cannot be recovered; the iron filings-lime method can treat waste with waste, and the treatment cost is low, but the water purification ability is poor, and it is only suitable for low-concentration wastewater, and it does not have the recovery function; the sulfur dioxide method, this method It can recycle vanadium chromium and realize zero discharge of waste water, but it has disadvantages such as complex process, large equipment occupation and high energy consumption.

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  • Zero emission process of vanadium extraction wastewater

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Effect test

Embodiment 1

[0056] Get the vanadium extraction tail liquid 1L of Chengde No. 1 Vanadium Chemical Plant, its main chemical composition is shown in Table 2; Put into capacity and be in the volumetric flask of 5L, according to operating technique of the present invention, for example figure 1 The vanadium extraction waste water recycling process flow shown is for the treatment of the vanadium extraction tail liquid.

[0057] Table 2 Main chemical composition of vanadium extraction tail liquid (g / L)

[0058] V 5+ (mg / l

[0059] Table 3 National GB8978-1996 "Comprehensive Wastewater Discharge Standard" primary standard

[0060] V5+(mg / l)

[0061] As can be seen from the above table, the vanadium extraction wastewater is acidic, and the first pollutant V in the wastewater is 5+ 、Cr 6+ The content is relatively high, far higher than the maximum allowable discharge concentration of the first category of pollutants in the "Integrated Wastewater Discharge Standard", and the ...

Embodiment 2

[0066] Get the vanadium extraction tail liquid 1L of Chengde No. 1 vanadium chemical plant, its main chemical composition is shown in Table 5; Put into capacity and be in the volumetric flask of 5L, carry out the processing of extracting vanadium tail liquid according to the operation technique of the present invention, the composition after processing See Table 6

[0067] Table 5 Main chemical composition of vanadium extraction tail liquid (g / L)

[0068] V 5+ (mg / l

[0069] Table 6 Main chemical components after vanadium extraction tail liquid treatment

[0070] V 5+ (mg / l)

[0071] According to the measurement results, the suspended solids are all removed, the recovery rate of vanadium is 99.7%, and the recovery rate of chromium is 99.9%, which basically realizes the effective recovery of vanadium and chromium. After crystallization, the content of sodium salt in the tail liquid is greatly reduced, and the filtrate can be returned to leaching process...

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Abstract

The invention relates to a zero emission process of vanadium extraction wastewater. By adopting the zero emission process, the residual vanadium and chromium in vanadium extraction wastewater can be effectively recycled, the salts of the wastewater can also be recycled, the energy consumption is low, the technological operation is simple, the vanadium extraction tail washings can be completed returned and recycled, the zero emission of wastewater can be realized and the treatment problem of the vanadium extraction wastewater can be completely solved. The process is characterized in that D301 resin is used as adsorbing medium to adsorb vanadium ions and chromium ions.

Description

technical field [0001] The invention relates to a separation method for treating liquid with ion exchange resin as an adsorbent, in particular to a zero-discharge process for vanadium extraction wastewater. Specifically, the ion exchange resin is used to adsorb vanadium chromium ions in vanadium extraction wastewater, and then the crystallization method is adopted The sodium salt is removed to realize zero discharge of vanadium extraction wastewater. Background technique [0002] Extracting vanadium from vanadium slag is the main method to produce vanadium pentoxide. When atomized vanadium slag or converter vanadium slag is used as raw material, when the process of sodium sintering, water immersion, and acid vanadium salt precipitation is used, about 60 m3 of vanadium pentoxide will be discharged for every ton of vanadium pentoxide produced. 3 Vanadium extraction wastewater. Cr contained in vanadium extraction wastewater 6+ and V 5+ On the one hand, it is toxic to the hu...

Claims

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Application Information

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IPC IPC(8): C02F9/04C01D5/00
Inventor 刘彦华李培佑侯娜娜刘雪冬李士琦
Owner 北京能泰高科环保技术有限公司
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