A method for resource utilization of vanadium extraction wastewater to produce ammonia-hydrocarbon denitrification agent

Abstract

A method for resourcefully using vanadium extracting wastewater for producing an ammonia-hydrocarbon denitrifying agent includes the following steps of firstly, putting vanadium extracting wastewater in a stirring tank or pool, and adding a liquid property adjusting agent to adjust the pH value to be 5.5-11 to obtain a solution A; secondly, preparing a material from, by mass, 40-90% of solution A as the main raw material, 9.9-50% of NOX reducing agent and 0.1-10% of denitrifying accelerant, and adding the NOX reducing agent and the denitrifying accelerant to the solution A over stirring to prepare uniform liquid, namely, the ammonia-hydrocarbon denitrifying agent.The method is simple and practical, small in investment and quite low in treatment operating energy consumption, the technical problem of severe pollution of vanadium-containing wastewater for restraining the sustainable development of the vanadium product industry can be thoroughly solved, the economic benefits are improved for enterprises, and energy conservation, consumption reduction and environment protection are facilitated.

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 ammonia-hydrocarbon denitrification agent for dry-process rotary kiln cement industry. 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+ ...

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

Obviously, the use of ammonia or urea for environmental denitrification on the one hand competes with agriculture for fertilizers, and on the other hand indirectly increases energy consumption and environmental pollution due to the high energy consumption and pollution of ammonia and urine production

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