Low-temperature flue gas denitration catalyst forming process

A low-temperature flue gas, forming process technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the additional energy consumption Large, expensive operating costs and other problems, to achieve the effect of improved activity and broad application prospects

Active Publication Date: 2014-12-03
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a large number of industrial furnaces and kilns, due to the low exhaust gas temperature (<250°C), such as waste power plants, low-temperature and low-dust methods are mostly feasible in engineering,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A honeycomb catalyst molding process for low-temperature flue gas denitrification, the steps are as follows:

[0020] Step 1: Add 240g of ammonium metavanadate powder and 190g of kapok to 300-400ml of deionized aqueous solution and stir for 10 minutes to form a white suspension. Add 50g of monoethanolamine to the suspension and continue stirring at 80 Under the condition of ℃, heat until the ammonium metavanadate is completely dissolved, and become solution 1.

[0021] Step 2: Add 40 g of lactic acid solution dropwise to a solution formed by mixing 360 g of silica sol (30 wt%) and 360 g of aluminum sol (30 wt%) to form solution 2.

[0022] Step 3: Add 2940g titanium dioxide, 0g squash powder, 280g PEO, 112g CMC, 80g stearic acid, and 100g fiber (3-6mm in length) into a kneader, stir and mix evenly to obtain milky white mixed powder.

[0023] Step 4: Add solution 1 and solution 2 and 4000ml of deionized water to the mixed powder obtained in step 3 respectively, and stir...

Embodiment 2

[0029] A honeycomb catalyst molding process for low-temperature flue gas denitrification, the steps are as follows:

[0030] Step 1: Add 240g of ammonium metavanadate powder and 190g of kapok to 300-400ml of deionized aqueous solution and stir for 10 minutes to form a white suspension. Add 50g of monoethanolamine to the suspension and continue stirring at 80 Under the condition of ℃, heat until the ammonium metavanadate is completely dissolved, and become solution 1.

[0031] Step 2: Add 40 g of lactic acid solution dropwise to a solution formed by mixing 360 g of silica sol (30 wt%) and 360 g of aluminum sol (30 wt%) to form solution 2.

[0032] Step 3: Add 2880g titanium dioxide, 60g squash powder, 280g PEO, 112g CMC, 80g stearic acid, and 100g fiber (3-6mm in length) into a kneader, stir and mix evenly to obtain milky white mixed powder.

[0033] Step 4: Add solution 1 and solution 2 and 4000ml of deionized water to the mixed powder obtained in step 3 respectively, and sti...

Embodiment 3

[0039] A honeycomb catalyst molding process for low-temperature flue gas denitrification, the steps are as follows:

[0040] Step 1: Add 240g of ammonium metavanadate powder and 190g of kapok to 300-400ml of deionized aqueous solution and stir for 10 minutes to form a white suspension. Add 50g of monoethanolamine to the suspension and continue stirring at 80 Under the condition of ℃, heat until the ammonium metavanadate is completely dissolved, and become solution 1.

[0041] Step 2: Add 40 g of lactic acid solution dropwise to a solution formed by mixing 360 g of silica sol (30 wt%) and 360 g of aluminum sol (30 wt%) to form solution 2.

[0042] Step 3: Add 2820g titanium dioxide, 120g squash powder, 280g PEO, 112g CMC, 80g stearic acid, and 100g fiber (length 3-6mm) into a kneader, stir and mix evenly to obtain a milky white mixed powder.

[0043] Step 4: Add solution 1 and solution 2 and 4000ml of deionized water to the mixed powder obtained in step 3 respectively, and sti...

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PUM

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Abstract

The invention relates to a low-temperature flue gas denitration catalyst forming process. The low-temperature flue gas denitration catalyst forming process comprises the following steps of adding ammonium metavanadate powder and kapok in deionized water, stirring to form white suspension liquid, then adding monoethanolamine, and heating until the ammonium metavanadate powder is wholly dissolved to form a solution 1; dropwise adding a lactic acid solution in a mixed liquid of silica sol and alumina sol to form a solution 2; adding titanium dioxide, sesbania powder, PEO, CMC, stearic acid and fiber, stirring and uniformly mixing to obtain milk white mixed powder; adding the solution 1, the solution 2 and the deionized water in the mixed powder, and stirring to obtain a wet material mass; and carrying out extrusion moulding on the wet material mass by an extruder, and drying and calcining to obtain the catalyst. With the adoption of the low-temperature flue gas denitration catalyst forming process, as active ingredients of a traditional vanadium-tungsten-titanium catalyst system are hardly modified, and the production process is changed to certain extent, the activity is obviously improved, strip and honeycomb type catalysts are extruded by slightly regulating a formula, and the low-temperature flue gas denitration catalyst forming process can be widely applied to industrial furnaces used for waste incineration and the like with low temperature and complex flue gas conditions and flue gas denitration of a coal-fired power plant in low-temperature arrangement.

Description

technical field [0001] The invention relates to the technical field of nitrogen oxide control in environmental protection, in particular to a catalyst forming process for low-temperature flue gas denitrification. Background technique [0002] For NO emissions from stationary sources such as power plants and industrial boilers X , to NH 3 Selective Catalytic Reduction (SCR) as a reducing agent is currently the most researched, most widely used, and most effective flue gas NO X removal technique. The most mature catalyst currently used is V 2 o 5 / TiO 2 or at V 2 o 5 / TiO 2 The main advantages of catalysts modified on the basis of the above are high activity and high sulfur resistance, but such catalysts only have high activity when the operating temperature is higher than 350 °C. For a large number of industrial furnaces and kilns, due to the low exhaust gas temperature (<250°C), such as waste power plants, low-temperature and low-dust methods are mostly feasible ...

Claims

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Application Information

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IPC IPC(8): B01J31/38B01J35/04B01J35/02B01D53/86B01D53/56
CPCB01D53/56B01D53/86B01J21/06B01J21/12B01J23/20
Inventor 李俊华黄旭彭悦关立军王子腾郝吉明
Owner TSINGHUA UNIV
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