Preparation method and application of catalyst for removing dioxin from flue gas

A dioxin and catalyst technology, applied in the field of denitrification catalyst preparation, can solve the problems of increasing operating costs, etc., and achieve the effect of improving low-temperature activity, high mechanical strength, and superior low-temperature activity

Inactive Publication Date: 2016-11-16
SANLONG CATALYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional activated carbon adsorption method only transfers and enriches dioxins from the gas to the solid, and the physical and chemical properties of the dioxins do not change. The activated carbon after use must be incinerated at high temperature for a second time, which increases the operating cost

Method used

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  • Preparation method and application of catalyst for removing dioxin from flue gas
  • Preparation method and application of catalyst for removing dioxin from flue gas
  • Preparation method and application of catalyst for removing dioxin from flue gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Purchase commercially available metatitanic acid as a raw material, beat with deionized water, wash and filter, and remove unwashed SO 4 , so that SO 4 Controlled at 3-4% (with TiO 2 count);

[0033] (2) Take 1777.8g of metatitanic acid (TiO 2 content of about 45% (W)) add an appropriate amount of deionized water for beating, and add 3% (in the form of V) to the beating 2 o 5 38.6g of ammonium metavanadate) (use 5% oxalic acid solution to dissolve ammonium metavanadate under heating), after the metavanadate oxalic acid solution and metatitanic acid are fully mixed, then add 8mol of ammonia water dropwise to adjust the pH of the solution to 9.0-9.2, then filtered, washed with water, dried and pulverized for later use;

[0034] Get the above-mentioned metatitanic acid mixture loaded with vanadium, add high-viscosity attapulgite 133.3g (solid content is 90%), add hole expansion, lubricant: 30g of turmeric powder and molding binder: hydroxypropyl methyl Base cellu...

Embodiment 2

[0040] (1) Purchase commercially available metatitanic acid as a raw material, beat with deionized water, wash and filter, and remove unwashed SO 4 , so that SO 4 Controlled at 3-4% (with TiO 2 count);

[0041] (2) Take 1777.8 g of metatitanic acid after washing and add 6% (in V 2 o 5 77.2g of ammonium metavanadate, 3% (in terms of WO 3 In terms of) ammonium metatungstate 32.3g and 1% (as Nb 2 o 5 47.3g of niobium oxalate), and finally add 111g of high-viscosity attapulgite and an appropriate amount of deionized water for kneading, so that the active components are fully mixed, and then add hole expansion, lubricant: hydroxypropyl methylcellulose Plain 40g, continue kneading, and then extrude into a 50×50×100mm honeycomb titanium carrier on a special mold (honeycomb small hole 3×3mm);

[0042] (3) Drying and activation process conditions of the honeycomb titanium carrier loaded with active components: According to the indication and actual measurement of the differentia...

Embodiment 3

[0046] (1) Purchase commercially available metatitanic acid as a raw material, beat with deionized water, wash and filter, and remove unwashed SO 4 , so that SO 4 Controlled at 3-4% (with TiO 2 count);

[0047] (2) Take 1777.8g of metatitanic acid (TiO 2 content of about 45% (W)) add an appropriate amount of deionized water for beating, and add 7% (in the form of V) to the beating 2 o 5 90.1 g of ammonium metavanadate) (use 5% oxalic acid solution to dissolve ammonium metavanadate under heating), after the metavanadate oxalic acid solution and metatitanic acid are fully mixed, then add 8 mol of ammonia water dropwise to adjust the pH of the solution to 9.0-9.2, then filtered, washed with water, dried and pulverized for later use;

[0048] Get the above-mentioned metatitanic acid mixture loaded with vanadium, add high-viscosity attapulgite 111g, add 3% (as Nb 2 o 5 Total) 141.8g of niobium oxalate, adding hole expansion, lubricant: 30g of safflower powder and forming bin...

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Abstract

The invention provides a catalyst for removing dioxins in flue gas, which belongs to the technical field of waste incineration treatment, including attapulgite, TiO 2 and active ingredients, active ingredients include V 2 o 5 、WO 3 , Sb 2 o 5 and Nb 2 o 5 , the attapulgite, TiO 2 The sum of the mass percentages of active components and active components is 100%, attapulgite 0‑20%, TiO 2 75‑85%, V in active ingredient 2 o 5 3‑10%, WO 3 0‑7%, Sb 2 o 5 0‑7%, Nb 2 o 5 1‑5%, MoO 3 0‑9%. The invention also provides a preparation method and application of the catalyst for removing dioxins in flue gas. The invention has properties such as large specific surface area, superior low-temperature activity, high ability to remove dioxins and high mechanical strength, so that the performance of the catalyst can be maximized, and can be widely used in the removal of dioxins in flue gas remove.

Description

technical field [0001] The invention relates to the technical field of waste incineration treatment, in particular to a preparation method and application of a denitrification catalyst. Background technique [0002] The reform and opening up has promoted the rapid development of my country's economy, and the economic development has promoted the continuous acceleration of the urban process. Along with the improvement of people's living standards, the generation of urban waste has also increased dramatically. According to incomplete statistics, the annual output of urban waste in my country reaches 140 million tons, and is still increasing at an annual growth rate of 8-10%. [0003] Landfill, composting, and incineration are commonly used for municipal waste disposal. In view of the shortage of available land resources in our country, the landfill method and composting method are gradually eliminated. The waste incineration method is favored by people because of its large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01J23/889B01D53/86B01D53/70
CPCB01J23/002B01D53/8662B01D2257/2064B01J23/30B01J23/8892B01J2523/00
Inventor 沈炳龙沈雁军沈雁鸣沈雁来刘丽萍
Owner SANLONG CATALYST
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