Method for resourcefully using vanadium extracting wastewater for producing ammonia-hydrocarbon denitrifying agent

A hydrocarbon denitration agent and resource utilization technology, applied in chemical instruments and methods, water pollutants, neutralized water/sewage treatment, etc., can solve problems such as increased energy consumption, environmental pollution, high operating costs, and secondary pollution , to achieve the effects of saving energy, reducing consumption and environmental protection, improving the economic benefits of enterprises, and promoting energy saving and emission reduction

CN105668755AActive Publication Date: 2016-06-15长沙紫宸科技开发有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2016-06-15

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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.
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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+ ...

Examples

Embodiment 1

[0048] The vanadium extraction wastewater was selected from a vanadium precipitation wastewater roasted with sodium slag, and the water-liquid property regulator was selected from commercially available monoethanolamine, NO X Triethanolamine is selected as the reducing agent, and hydrazine hydrate is selected as the denitrification accelerator. According to the following steps, ammonia-hydrocarbon denitrification agent (referred to as denitrification agent) is directly prepared from vanadium extraction wastewater as the main raw material:

[0049] (1) Adjust the properties of the vanadium extraction wastewater: put the vanadium extraction wastewater in a stirring tank, add ethanolamine, an aqueous liquid property regulator, to adjust the pH value to 6.1, and obtain solution A;

[0050] (2) Preparation of ammonia-hydrocarbon denitrification agent: use the obtained solution A as the main raw material and NO X The reducing agent triethanolamine and the denitrification accelerato...

Embodiment 2

[0052] Vanadium-extracting wastewater was selected from vanadium-containing wastewater roasted by sodium-containing stone coal, and the water-liquid property regulator was selected from commercially available N-methyl monoethanolamine, NO X Commercially available ammonium carbonate and isopropanol are selected as the reducing agent, and carbohydrazide is selected as the denitrification accelerator. According to the following steps, ammonia-hydrocarbon denitrification agent (referred to as denitrification agent) is directly prepared from vanadium extraction wastewater as the main raw material:

[0053] (1) Adjust the properties of the vanadium extraction wastewater: put the vanadium extraction wastewater in a stirring tank, add N-methyl monoethanolamine to adjust the pH value to 6.3, and obtain solution A;

[0054] (2) Preparation of ammonia-hydrocarbon denitrification agent: use the obtained solution A as the main raw material and NO XThe reducing agent ammonium carbonate, is...

Embodiment 3

[0056] The vanadium extraction wastewater was selected from a factory that used a fluidized bed furnace to roast vanadium-containing stone coal without salt, and the water-liquid property regulator was selected from commercially available ammonium carbonate, NO X Commercially available ammonia water (27% mass concentration) and glucose (waste liquid) were selected as the reducing agent, and hydrazine hydrate was selected as the denitrification accelerator. According to the following steps, the ammonia-hydrocarbon denitrification agent is directly prepared from vanadium extraction wastewater as the main raw material:

[0057] (1) Adjust the properties of the vanadium extraction wastewater: put the vanadium extraction wastewater in a stirring tank, add ammonium carbonate, an aqueous liquid property regulator, to adjust the pH value to 7.8, and obtain solution A;

[0058] (2) Preparation of ammonia-hydrocarbon denitrification agent: the obtained solution A is used as the main raw...