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Stirring device for preparing low-temperature denitration catalyst

A stirring device and low-temperature denitrification technology, which is applied to mixers with rotating stirring devices, mixer accessories, transportation and packaging, etc., can solve problems such as inability to mix efficiently and uniformly, affect catalyst denitrification efficiency, etc., achieve efficient, rapid and uniform mixing, improve Effect of denitrification performance

Pending Publication Date: 2022-07-22
ZHEJIANG TUNA ENVIRONMENTAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stirring device used in the existing low-temperature denitrification catalyst usually uses a two-way rotating shaft to drive the stirring rod to stir the materials, which cannot completely mix the various solid and liquid materials of the low-temperature denitrification catalyst efficiently and uniformly, which affects the denitrification efficiency of the catalyst. Therefore it is necessary to improve the stirring device

Method used

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  • Stirring device for preparing low-temperature denitration catalyst
  • Stirring device for preparing low-temperature denitration catalyst
  • Stirring device for preparing low-temperature denitration catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A low-temperature denitration catalyst, the low-temperature denitration catalyst comprises a cordierite carrier and an active component coated on the carrier, and the loading amount of the active component is 3wt%; the active component comprises 3wt% of V 2 O 5 , 10wt% MoO 3 , 2.5wt% SiO 2 , 82.2wt% TiO 2 and 2.3wt% of phosphate ions, and the loading amount of vanadium element in the active component in the low-temperature denitration catalyst is 5.04wt%.

[0027] The preparation method of the low-temperature denitration catalyst comprises the following steps:

[0028] (a) adding deionized water to the stirring device, adding titanium dioxide while stirring, then adding oxalic acid-ammonium metavanadate mixed solution and ammonium heptamolybdate, wherein the oxalic acid-ammonium metavanadate mixed solution is 20% by mass concentration The oxalic acid solution and the ammonium metavanadate solution with a mass concentration of 30% are mixed at a mass ratio of 1:1 to ...

Embodiment 2

[0033] A low-temperature denitration catalyst, the low-temperature denitration catalyst comprises a cordierite carrier and an active component coated on the carrier, the loading of the active component is 1.8 wt %; the active component comprises 6.5 wt % of V 2 O 5 , 3wt% MoO 3 , 3wt% SiO 2 , 86.5wt% TiO 2 and 1 wt % of phosphate ions, and the loading amount of vanadium element in the active component in the low-temperature denitration catalyst is 6.55 wt %.

[0034] The preparation method of the low-temperature denitration catalyst comprises the following steps:

[0035] (a) adding deionized water to the stirring device, adding titanium dioxide while stirring, then adding oxalic acid-ammonium metavanadate mixed solution and ammonium heptamolybdate, wherein the oxalic acid-ammonium metavanadate mixed solution is 20% by mass concentration The oxalic acid solution and the ammonium metavanadate solution with a mass concentration of 30% are mixed at a mass ratio of 1:1 to form...

Embodiment 3

[0040] A low-temperature denitration catalyst, the low-temperature denitration catalyst comprises a cordierite carrier and an active component coated on the carrier, the loading of the active component is 1.1 wt %; the active component comprises 11.5 wt % of V 2 O 5 , 12wt% MoO 3 , 3.7wt% SiO 2 , 70wt% TiO 2 and 2.8wt% of phosphate ions, and the loading amount of vanadium element in the active component in the low-temperature denitration catalyst is 7.09wt%.

[0041] The preparation method of the low-temperature denitration catalyst comprises the following steps:

[0042] (a) adding deionized water to the stirring device, adding titanium dioxide while stirring, then adding oxalic acid-ammonium metavanadate mixed solution and ammonium heptamolybdate, wherein the oxalic acid-ammonium metavanadate mixed solution is 20% by mass concentration The oxalic acid solution and the ammonium metavanadate solution with a mass concentration of 30% were mixed at a mass ratio of 1:1 to for...

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Abstract

The stirring device comprises a tank body, a rotatable main shaft, a pair of first stirring paddles which are symmetrically arranged, and second stirring paddles which are uniformly distributed on the circumference, a first gear and a second gear are fixedly arranged on the main shaft, and a gear ring and an annular fixing plate are fixedly arranged on the inner wall of the upper part of the tank body; a support is fixedly arranged in the tank body and comprises a disc-shaped mounting part, an annular through hole is formed by the annular outer wall of the mounting part and the annular inner wall of the fixing plate, an annular connecting piece is arranged above the through hole, and the annular connecting piece is in sliding connection with the mounting part and the fixing plate at the same time; the second stirring paddle penetrates through the connecting piece and the through hole and is rotationally connected with the connecting piece, and the first stirring paddle is in meshing transmission connection with the second gear through the third gear. The device disclosed by the invention can realize efficient, rapid and uniform mixing of catalyst materials and improve the denitration performance of the low-temperature denitration catalyst.

Description

technical field [0001] The invention relates to the technical field of denitration catalyst production equipment, in particular to a stirring device for preparing a low temperature denitration catalyst. Background technique [0002] SCR technology is currently the most widely used flue gas denitration technology, and the low-temperature denitration catalyst used in it is suitable for a temperature of 300-420 °C. For non-electrical industries, the composition of flue gas generated in the production process is complex, and the emission temperature is generally lower than 300 °C. If the existing high-temperature and low-temperature denitration catalyst is still used for denitrification at this emission temperature, low catalyst activity and sulfur resistance will occur. The problem of poor performance, that is to say, the existing high-temperature denitration catalysts are not suitable for flue gas denitration in non-electrical industries. The low-temperature denitration catal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F27/90B01F27/191B01F27/2322B01F27/95B01F35/52
Inventor 赵博马太余王阔李浙飞沈刚峰
Owner ZHEJIANG TUNA ENVIRONMENTAL SCI & TECH
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