A kind of resource utilization method of vanadium extracting waste water to produce catalytic combustion enhancer for coal

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 ...

Examples

Embodiment 1

[0050] In this example, the vanadium extraction wastewater is selected from a vanadium precipitation wastewater roasted with sodium slag, the water-liquid property regulator is selected from commercially available monoethanolamine, and the rare earth catalyst is selected from a water-soluble V-type rare earth catalyst developed by a base of Central South University ( Commercially available product) (unseparated mixture of light rare earth elements, the main components are water-soluble salicylate of lanthanide light rare earth elements such as lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, holmium, and erbium , a compound of nitrate and chloride salt), and the combustion aid is commercially available lithium perchlorate.

[0051] Using waste water from vanadium extraction as the main raw material, the catalytic combustion accelerant for pulverized coal combustion in industrial kilns is produced according to the following steps:

[0052]...

Embodiment 2

[0055] The vanadium extraction wastewater was selected from a certain vanadium-containing stone coal sodium-roasted wastewater, the water-liquid property regulator was selected from commercially available N-methyl monoethanolamine, and the rare earth catalyst was selected from a water-soluble V-type rare earth catalyst developed by a base of Central South University. (It is an unseparated mixture of light rare earth elements, and its main components are water-soluble salicylate, nitrate and Chloride compound), the combustion aid is commercially available lithium nitrate.

[0056] Using waste water from vanadium extraction as the main raw material, the catalytic combustion accelerant for pulverized coal combustion in industrial kilns is produced according to the following steps:

[0057] (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 7, and obtain...

Embodiment 3

[0060] The vanadium extraction wastewater was selected from a factory using a fluidized bed furnace to roast vanadium-containing stone coal without salt. The water-liquid property regulator was selected from commercially available liquid ammonia. The rare earth catalyst was selected from a water-soluble type VI rare earth catalyst developed by a base of Central South University. (It is an unseparated mixture of light rare earth elements, the main components are water-soluble citrate, nitrate and chlorine of lanthanum light rare earth elements such as lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, holmium and erbium Salt complex), and commercially available lithium nitrate is selected as the combustion aid.

[0061] Using waste water from vanadium extraction as the main raw material, the catalytic combustion accelerant for pulverized coal combustion in industrial kilns is produced according to the following steps:

[0062] (1) Adjust the...

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 ...

Examples

Embodiment 1

[0050] In this example, the vanadium extraction wastewater is selected from a vanadium precipitation wastewater roasted with sodium slag, the water-liquid property regulator is selected from commercially available monoethanolamine, and the rare earth catalyst is selected from a water-soluble V-type rare earth catalyst developed by a base of Central South University ( Commercially available product) (unseparated mixture of light rare earth elements, the main components are water-soluble salicylate of lanthanide light rare earth elements such as lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, holmium, and erbium , a compound of nitrate and chloride salt), and the combustion aid is commercially available lithium perchlorate.

[0051] Using waste water from vanadium extraction as the main raw material, the catalytic combustion accelerant for pulverized coal combustion in industrial kilns is produced according to the following steps:

[0052]...

Embodiment 2

[0055] The vanadium extraction wastewater was selected from a certain vanadium-containing stone coal sodium-roasted wastewater, the water-liquid property regulator was selected from commercially available N-methyl monoethanolamine, and the rare earth catalyst was selected from a water-soluble V-type rare earth catalyst developed by a base of Central South University. (It is an unseparated mixture of light rare earth elements, and its main components are water-soluble salicylate, nitrate and Chloride compound), the combustion aid is commercially available lithium nitrate.

[0056] Using waste water from vanadium extraction as the main raw material, the catalytic combustion accelerant for pulverized coal combustion in industrial kilns is produced according to the following steps:

[0057] (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 7, and obtain...

Embodiment 3

[0060] The vanadium extraction wastewater was selected from a factory using a fluidized bed furnace to roast vanadium-containing stone coal without salt. The water-liquid property regulator was selected from commercially available liquid ammonia. The rare earth catalyst was selected from a water-soluble type VI rare earth catalyst developed by a base of Central South University. (It is an unseparated mixture of light rare earth elements, the main components are water-soluble citrate, nitrate and chlorine of lanthanum light rare earth elements such as lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, holmium and erbium Salt complex), and commercially available lithium nitrate is selected as the combustion aid.

[0061] Using waste water from vanadium extraction as the main raw material, the catalytic combustion accelerant for pulverized coal combustion in industrial kilns is produced according to the following steps:

[0062] (1) Adjust the...

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