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Special ceramic catalyst for denitrification and dioxin removal of flue gas and preparation method thereof

A technology for removing dioxins and special ceramics, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as unmanageable and energy waste, achieve good energy saving and environmental protection benefits, and adapt to temperature ranges wide and low ammonia escape rate

Active Publication Date: 2014-01-08
SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon adsorption only transfers dioxins from flue gas to activated carbon, and cannot fundamentally treat them
The flue gas quenching technology refers to the sudden drop of the flue gas temperature from 600°C to below 200°C to avoid the generation of dioxins, but it causes a lot of waste of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The special ceramic catalyst for flue gas denitrification and flue gas denitrification and dioxin removal in this embodiment is made of the following raw materials in weight ratio: 60% titanium dioxide, 9% tungsten trioxide, 2% vanadium pentoxide, and 3% silicon dioxide , transition metal 2%, glass fiber 10%, lactic acid 5%, grade cellulose 3% and the balance is polyethylene glycol.

[0034] The specific preparation method of special ceramic catalyst for flue gas denitrification and dioxin removal is as follows:

[0035] (1) Mixing: Mix titanium dioxide, tungsten trioxide, vanadium pentoxide, silicon dioxide and palladium evenly, then add molding agent, and mix;

[0036] (2) Filtration pre-extrusion: After the material obtained in step 1 is stale for 12 hours, it is filtered, and the filtered material is cooled and directly pre-extruded;

[0037] (3) Extrusion: extrude the pre-extruded product obtained in step (2) through a mold;

[0038] (4) Wet cutting: cutting the ...

Embodiment 2

[0045] The special ceramic catalyst for flue gas denitrification and flue gas denitrification and dioxin removal in this embodiment is made of the following raw materials in weight ratio: 90% titanium dioxide, 3% tungsten trioxide, 0.1% vanadium pentoxide, and 1% silicon dioxide , 0.3% transition metal, 3% glass fiber, and the balance is 1.5% grade A cellulose and polyethylene glycol.

[0046] The specific preparation method of special ceramic catalyst for flue gas denitrification and dioxin removal is as follows:

[0047] (1) Mixing: mix titanium dioxide, tungsten trioxide, vanadium pentoxide, silicon dioxide, palladium, cerium, lanthanum and ytterbium evenly, add binder and forming agent, and mix;

[0048] (2) Filtration pre-extrusion: After the material obtained in step 1 is stale for 36 hours, it is filtered, and the filtered material is cooled and then directly pre-extruded;

[0049] (3) Extrusion: extrude the pre-extruded product obtained in step (2) through a mold;

...

Embodiment 3

[0057] The special ceramic catalyst for flue gas denitrification and flue gas denitrification and dioxin removal in this embodiment is made of the following raw materials in weight ratio: 75% titanium dioxide, 5% tungsten trioxide, 1% vanadium pentoxide, and 5% silicon dioxide , 1.5% transition metal, 5% glass fiber, and the balance is lactic acid.

[0058] The specific preparation method of special ceramic catalyst for flue gas denitrification and dioxin removal is as follows:

[0059] (1) Mixing: Mix titanium dioxide, tungsten trioxide, vanadium pentoxide, silicon dioxide, lanthanum and ytterbium evenly, then add molding agent, and mix;

[0060] (2) Filtration pre-extrusion: After the material obtained in step 1 is stale for 20 hours, it is filtered, and the filtered material is cooled and directly pre-extruded;

[0061] (3) Extrusion: extrude the pre-extruded product obtained in step (2) through a mold;

[0062] (4) Wet cutting: cutting the special ceramic catalyst for fl...

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PUM

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Abstract

The invention discloses a special ceramic catalyst for denitrification and dioxin removal of flue gas and a preparation method thereof. The special ceramic catalyst is prepared from the following raw materials in parts by weight: 60-90% of titanium dioxide, 3-9% of tungsten trioxide, 0.1-2% of vanadium pentoxide, 1-5% of silica, 0.1-2% of transition metal, 3-10% of glass fiber and the balance of forming agent. The method comprises the following steps: evenly mixing the raw materials; cooling, pre-extruding, extruding, wet cutting, drying, and calcining to obtain the product. The special ceramic catalyst has the functions of denitration and dioxin removal; the entire body has activity, has high denitration efficiency, low SO2 / SO3 conversion rate, low ammonia escape rate, high abrasion resistance, high strength, long chemical service life, long mechanical service life and wide adaptive temperature range, and is free of waste gas in a technical process of production, and small in output of domestic wastewater; and the factory boundary noise value reaches the standard requirement.

Description

technical field [0001] The invention relates to a ceramic catalyst, in particular to a special ceramic catalyst for flue gas denitrification and dioxin removal and a preparation method thereof. Background technique [0002] Nitrogen oxides (NOx) and dioxins (CDDs) are two major sources of air pollution, which not only damage various human organs, but even cause cancer. [0003] For flue gas denitrification, the most mature technology in the world is SCR denitrification technology. SCR denitrification technology refers to the reduction of NOx in the flue gas and the reducing agent (NH 3 ) undergoes a reduction reaction to generate N 2 and H 2 O. The denitrification special ceramic is the core of the SCR technology, which determines the denitrification efficiency of the SCR technology, and its cost usually accounts for 30%-50% of the total investment of the denitrification device. [0004] The specific reaction formula of denitrification is as follows: [0005] 4NH 3 +4...

Claims

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Application Information

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IPC IPC(8): B01J23/652B01J23/30B01D53/86B01D53/56B01D53/70
Inventor 赵艳军荣卫龙巩晓王文红边波
Owner SHANDONG AIREP ENVIRONMENTAL TECH CO LTD
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