Method for producing coal-used catalysis combustion-supporting agent through resource utilization of vanadium extraction wastewater

Abstract

The invention provides a method for producing a coal-used catalysis combustion-supporting agent through resource utilization of vanadium extraction wastewater. The method includes the following steps that 1, the property of vanadium extraction wastewater is adjusted, wherein the vanadium extraction wastewater is placed in a tank or pool, a water fluid property adjusting agent is added to adjust the PH value to be 5.8-9.8, and a solution A is obtained; 2, the coal-used catalysis combustion-supporting agent is prepared, wherein by mass, 40-70% of the solution A, 29-50% of a rare earth system catalyst and 1-10% of the combustion-supporting agent are blended, the rare earth system catalyst and the combustion-supporting agent are added to the solution A while stirring is conducted to be made into uniform liquid, and the coal-used catalysis combustion-supporting agent is obtained. The technical method is simple, practical, small in investment, quite low in processing and operation energy consumption, capable of thoroughly solving the technical problem of serious pollution caused by vanadium-containing wastewater which restrains sustainable development of the vanadium product industry and increasing economic benefits of enterprises, beneficial to solve the problems that vanadium extraction wastewater treatment is high in investment, high in energy consumption, high in cost and capable of causing secondary pollution existing for a long time and beneficial to save energy, lower consumption and protect the environment.

Description

technical field [0001] The invention relates to the field of environmental protection and waste utilization, in particular to a method for resource utilization of vanadium extraction wastewater to produce a catalytic combustion accelerant for coal. Background technique [0002] Vanadium products are widely used. Raw materials for vanadium extraction include vanadium-containing minerals such as stone coal, vanadium-titanium magnetite, vanadium slag, etc. Currently, the most economical and largest scale is vanadium-titanium magnetite metallurgical waste slag-vanadium slag. The main methods for extracting vanadium include sodium roasting, calcification roasting, and salt-free roasting. The vanadium extraction wastewater of sodium roasting is mainly produced in the supernatant waste residue in the process of vanadium precipitation and the filtrate in filtration and dehydration. The main pollution factors in the wastewater are PH, V 5+ 、Cr 6+ , Fe 2+ , Mn 5+ 、Ti 2+ , NH 4 ...

AI Technical Summary

Problems solved by technology

Physical and chemical methods have gradually formed a series of effective methods in the application of environmental protection, but for the heavy metal treatment of vanadium extraction wastewater, the process is long, the investment is large, the operating cost is still high, and there is secondary pollution

[0010] The fourth category is biological methods: there are mainly anaerobic biological methods and aerobic biological methods. If suitable bacterial flora can be selected, it can be treated at low cost, but for vanadium-chromium wastewater, the selection of bacterial flora is extremely difficult, and there are Subsequent treatment and secondary pollution

[0021] In fact, according to the relevant sewage discharge control indicators of the "Vadium Industry Pollutant Discharge Standard" (GB26452-2011), the vanadium, chromium and PH in the wastewater can easily reach the standard after the reduction and neutralization treatment with complex processes and high costs. But NH 4 -N (ammonia nitrogen), COD (chemical oxygen demand), and SS (suspended solids) are difficult to control, especially the treatment of ammonia nitrogen is extremely difficult, and there is no report on the treatment of vanadium-containing wastewater that is objectively up to standard in China. The problem of ammonia nitrogen treatment in vanadium-containing wastewater is a very thorny problem faced by domestic vanadium product factory wastewater treatment. The current relatively effective treatment methods mainly include "air stripping + oxidation removal of ammonia" or "blowing ammonia nitrogen + evaporation concentration " or "blowing ammonia nitrogen + adsorption" two-stage treatment technology and "electrolysis + catalytic oxidation" technology, but these methods have long process flow, complex equipment, large investment, high energy consumption, secondary pollution, and after ammonia nitrogen removal There is still a large amount of thick slurry waste liquid that needs to be transported out for disposal

[0022] Obviously, although the above-mentioned technical method involves the treatment of various pollutants in the vanadium extraction wastewater, on the one hand, the process is long, the investment is large, the energy consumption is high, and the cost is high; problems and secondary pollution, while ignoring the reuse of various components in vanadium extraction wastewater, especially ammonia nitrogen, salts and water resources, which is not in line with the concept of green, low-carbon and circular economy development

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