Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Conducting flue gas denitration catalyst and preparation method thereof

A denitration catalyst and flue gas technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of reduced service life, low denitration efficiency, corrosion, etc., and achieve a wide reaction temperature window and ammonia escape. The effect of low rate and long chemical life

Inactive Publication Date: 2014-11-19
SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flue gas of this arrangement contains a large amount of SO 2 、K 2 O, CaO and As 2 o 3 etc., will cause catalyst poisoning, and high concentration of fly ash will cause blockage and corrosion of the catalyst, reducing its service life
Moreover, due to the limitations of space and piping, the cost of retrofitting the SCR system installed above the desulfurization and dust collector in the existing boiler system of some power plants is very high
[0003] In addition, in other denitrification applications such as marine denitrification, sulfuric acid plants, coking plants, etc., the flue gas outlet temperature is relatively low, and the currently used medium temperature denitrification catalysts (generally V-Ti-W-based) cannot meet the requirements of denitrification
At present, various scientific research institutes and universities at home and abroad are also actively developing various low-temperature denitration catalysts, but the low-temperature denitration catalysts currently developed either have very low denitrification efficiency, or have a short service life, which cannot meet industrial applications at all.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The conductive flue gas denitrification catalyst of this embodiment is made of the following raw materials in percentage by weight: 62% of titanium dioxide, 9% of tungsten trioxide, 1% of vanadium pentoxide, 2% of silicon dioxide, 2% of cerium, 10% of C fiber, Lactic acid 6%, grade cellulose 4% and balance are polyethylene glycol.

[0031] The specific preparation method of the conductive flue gas denitrification catalyst is as follows:

[0032] (1) Mixing: Mix titanium dioxide, tungsten trioxide, vanadium pentoxide, silicon dioxide, and cerium evenly, then add C fiber, lactic acid, grade A cellulose and polyethylene glycol, and mix;

[0033] (2) Filtration pre-extrusion: After the material obtained in step (1) was stale for 12 hours, it was filtered, and the filtered material was cooled and directly pre-extruded;

[0034] (3) Extrusion: the pre-extruded product obtained in step (2) is extruded as a whole through a mould;

[0035] (4) Wet cutting: cutting the conducti...

Embodiment 2

[0043] The flue gas denitrification and conduction flue gas denitrification catalyst of this embodiment is made of the following raw materials in percentage by weight: titanium dioxide 90%, tungsten trioxide 3%, vanadium pentoxide 0.1%, silicon dioxide 1%, lanthanum 1%, C Fiber 3%, grade A cellulose 1.5% and balance polyethylene glycol.

[0044] The specific preparation method of the conductive flue gas denitrification catalyst is as follows:

[0045] (1) Mixing: Mix titanium dioxide, tungsten trioxide, vanadium pentoxide, silicon dioxide, and lanthanum evenly, then add C fiber, grade A cellulose and polyethylene glycol, and mix;

[0046] (2) Filtration pre-extrusion: After the material obtained in step (1) was stale for 30 hours, it was filtered, and the filtered material was cooled and directly pre-extruded;

[0047] (3) Extrusion: the pre-extruded product obtained in step (2) is extruded as a whole through a mould;

[0048] (4) Wet cutting: cutting the conductive flue gas...

Embodiment 3

[0056] The conductive flue gas denitrification catalyst of this embodiment is made of the following raw materials in percentage by weight: titanium dioxide 75%, tungsten trioxide 5%, vanadium pentoxide 1%, silicon dioxide 5%, lanthanum 1.5%, cerium 1%, C Fiber 5%, balance lactic acid.

[0057] The specific preparation method of the conductive flue gas denitrification catalyst is as follows:

[0058] (1) Mixing: mix titanium dioxide, tungsten trioxide, vanadium pentoxide, silicon dioxide, lanthanum and cerium evenly, add C fiber and lactic acid, and mix;

[0059] (2) Filtration pre-extrusion: After the material obtained in step (1) was stale for 20 hours, it was filtered, and the filtered material was cooled and then directly pre-extruded;

[0060] (3) Extrusion: the pre-extruded product obtained in step (2) is extruded as a whole through a mould;

[0061] (4) Wet cutting: cutting the conductive flue gas denitrification catalyst obtained in step (3) into sections;

[0062] (5)...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
water contentaaaaaaaaaa
Login to View More

Abstract

The invention relates to a conducting flue gas denitration catalyst and a preparation method thereof. The conducting flue gas denitration catalyst is prepared from the following raw materials in percentage by weight: 60 to 90 percent of titanium dioxide, 3 to 9 percent of tungsten trioxide, 0.1 to 2 percent of vanadium pentoxide, 1 to 5 percent of silicon dioxide, 1 to 5 percent of rare earth, 3 to 10 percent of C fibers and the balance of a forming agent. The conducting flue gas denitration catalyst has a wire function, implements low-temperature catalysis, has high denitration efficiency, a low SO2 / SO3 conversion rate, a low ammonia escape rate, wear resistance, high intensity, a long chemical service life and a long mechanical service life and has low output of domestic sewage.

Description

technical field [0001] The invention relates to an SCR flue gas denitration catalyst, in particular to a conductive flue gas denitration catalyst and a preparation method thereof. Background technique [0002] NOx in flue gas is a major source of air pollution. It not only damages various human organs, but even causes cancer. For flue gas denitrification, the most mature technology in the world is SCR denitrification technology. SCR denitrification technology refers to that under the action of the denitrification catalyst, the NOx in the flue gas and the reducing agent (NH 3 ) undergoes a reduction reaction to generate N 2 and H 2 O. However, the reaction temperature of the currently used SCR denitration catalyst is usually in the range of 350°C to 400°C, which is commonly referred to as a medium temperature denitration catalyst. In order to ensure the reaction temperature of the denitration catalyst and avoid catalyst clogging and deactivation caused by the production ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/30B01D53/86B01D53/56
Inventor 荣为龙
Owner SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products