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SCR denitration catalyst and preparation method thereof

A technology of SCR catalyst and denitration catalyst, which is applied in the field of SCR denitration catalyst and its preparation in glass furnaces, can solve the problems that have not been considered, and achieve the effects of ensuring activity, smooth surface and reducing the probability of poisoning

Inactive Publication Date: 2016-03-02
SHANGHAI LANGT AUTOCATALYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The SCR denitrification catalyst prepared by the above prior art has achieved good results in anti-alkali metal poisoning, but from the perspective of industrial application, the control of SO 2 / SO 3 Conversion rate and ammonia slip rate are also important aspects in the development of denitrification catalysts, but the above existing technologies have not considered them

Method used

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  • SCR denitration catalyst and preparation method thereof
  • SCR denitration catalyst and preparation method thereof
  • SCR denitration catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Mixing. Weigh 613.76kg of titanium tungsten silicon powder, 13.7kg of cerium oxide, 5.48kg of molybdenum trioxide, 13.7kg of iron oxide, 5.48kg of copper oxide, 10.96kg of lanthanum oxide, 1.096kg of ammonium metavanadate, 6.028kg of L-type lactic acid, ammonia water 38.36kg, monoethanolamine 1.096kg, glass fiber 41.648kg, pulp cotton 4.932kg, stearic acid 1.096kg, carboxymethylcellulose sodium 3.836kg, polyethylene oxide 3.288kg, deionized water 306.88kg, in the mixer Mix evenly according to the steps to obtain a paste-like blank.

[0029] 2) Kneading the above-mentioned paste-like blank, staleing once, pre-extruding by filtration, staling twice, extruding by vacuum forming, drying once, drying twice, calcining, cutting, and assembling to obtain the glass furnace kiln SCR denitrification catalyst finished product.

[0030] Catalyst activity test: Cut a 75×75×150mm catalyst and put it into the activity evaluation device for activity test. The simulated flue gas is ...

Embodiment 2

[0033] 1) Mixing. Weigh 630kg of titanium tungsten silicon powder, 5.48kg of cerium oxide, 0kg of molybdenum trioxide, 21.92kg of iron oxide, 0kg of copper oxide, 10.96kg of lanthanum oxide, 8.768kg of ammonium metavanadate, 6.028kg of L-type lactic acid, 46.58kg of ammonia water, Monoethanolamine 6.028kg, glass fiber 41.648kg, pulp cotton 2.192kg, stearic acid 5.48kg, sodium carboxymethyl cellulose 6.576kg, polyethylene oxide 5.48kg, deionized water 323.32kg, mixed in the mixer step by step Evenly, a paste-like billet is obtained.

[0034] 2) Kneading the above dough paste, staleing once, filtering pre-extrusion, staleing the second time, vacuum forming extrusion, drying once, drying twice, calcining, cutting, and assembling to obtain the glass kiln The finished SCR denitrification catalyst.

[0035] Catalyst activity test: Cut a 75×75×150mm catalyst and put it into the activity evaluation device for activity test. The simulated flue gas is fed by N 2 , O 2 , NO, NH 3 、H...

Embodiment 3

[0038] 1) Mixing. Weigh 646.64kg of titanium tungsten silicon powder, 13.7kg of cerium oxide, 5.48kg of molybdenum trioxide, 5.48kg of iron oxide, 5.48kg of copper oxide, 0kg of lanthanum oxide, 1.096kg of ammonium metavanadate, 10.96kg of L-type lactic acid, 38.36kg of ammonia water kg, monoethanolamine 6.028kg, glass fiber 41.648kg, pulp cotton 7.672kg, stearic acid 1.096kg, carboxymethylcellulose sodium 1.096kg, polyethylene oxide 1.096kg, deionized water 339.76kg, press Step Mix evenly to obtain a paste-like blank.

[0039] 2) Kneading the above dough paste, staleing once, filtering pre-extrusion, staleing the second time, vacuum forming extrusion, drying once, drying twice, calcining, cutting, and assembling to obtain the glass kiln The finished SCR denitrification catalyst.

[0040] Catalyst activity test: Cut a 75×75×150mm catalyst and put it into the activity evaluation device for activity test. The simulated flue gas is fed by N 2 , O 2 , NO, NH 3 、H 2 O and SO ...

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Abstract

The present invention discloses a SCR denitration catalyst and a preparation method. According to the present invention, titanium tungsten silicon powder is adopted as a carrier, and the components are subjected to mixing, kneading, primary staling, filtration pre-extrusion, secondary staling, vacuum molding extrusion, primary drying, secondary drying, calcination, cutting and assembling to prepare the product, and comprise, by weight, 56.0-59.0% of titanium tungsten silicon powder, 1.0-7.0% of an auxiliary catalyst, 0.1-1.5% of ammonium metavanadate, 0.1-1.0% of lactic acid, 3.5-5.0% of ammonia water, 0.1-1.0% of monoethanolamine, 3.0-5.0% of a structure aid, 0.2-1.1% of a binder, and 28.0-31.0% of water. The SCR denitration catalyst of the present invention has effects of effective alkali metal poisoning resistance improving and deactivation resistance so as to prolong the chemical use life of the catalyst.

Description

technical field [0001] The invention relates to the technical field of nitrogen oxide treatment, in particular to an SCR denitration catalyst for glass furnaces and a preparation method thereof. Background technique [0002] Domestic float glass production lines currently mainly use several fuels such as heavy oil, natural gas, and coal-based gas. According to the current production scale and fuel conditions of the domestic float glass industry, the exhaust temperature is mostly 450-500°C, and the denitrification inlet temperature is generally At 320-380°C. The main pollutants in the flue gas are SOx and NOx, and their contents vary greatly with the fuel used. For natural gas and coal gas, because the sulfur content in the fuel itself is very small, Na 2 SO 4 As a glass clarifier, it decomposes to generate a small amount of SO 2 , for furnaces using natural gas as fuel, SO 2 The emission concentration is 300~500mg / Nm 3 , the concentration is low; but the initial NOx em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01D53/86B01D53/56
Inventor 周坚刚
Owner SHANGHAI LANGT AUTOCATALYST
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