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Binder as well as application thereof in catalyst for removing nitric oxide in smoke gas

A nitrogen oxide and binder technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as aggravating NOX emissions and ammonia penetration , to achieve the effect of good denitration performance, simple application method and low cost

Inactive Publication Date: 2011-04-06
浙江德纳希环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For SNCR technology, when the temperature is lower than 900 ° C, it will cause the so-called "ammonia breakthrough" phenomenon, and the temperature is too high will cause NH 3 Aggravate NO by side reaction of oxidation to NO X emissions

Method used

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  • Binder as well as application thereof in catalyst for removing nitric oxide in smoke gas
  • Binder as well as application thereof in catalyst for removing nitric oxide in smoke gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Take 5g MnO x -V 2 o 5 / TiO 2 -CNTs catalyst powder, 0.3g organic bentonite and 0.7g composite Portland cement are mixed evenly, add appropriate amount of water and stir to make a slurry, and evenly coat on a rectangular aluminum sheet with a rough surface of 3.5cm×10cm×0.1cm Both sides were placed at room temperature for a period of time. After drying, the catalyst sheet was placed in a muffle furnace at 300°C for 1 hour, and then cooled with the furnace.

[0021] The laboratory simulates the working environment of commercial catalyst sheets, using 5m / s parallel wind to blow sheet-shaped catalysts, such as figure 1 , to examine its powder drop rate in one hour to measure its strength. Soak the sheet catalyst in water completely, and examine its powder shedding rate in one hour to measure its water resistance. Wherein, powder shedding rate = lost catalyst mass / catalyst quality coated on the sheet catalyst, the smaller the powder shedding rate, the better its streng...

Embodiment 2

[0023] Take 5g of MnOx-CeOx / TiO2-CNTs catalyst powder, 0.3g of organobentonite and 0.6g of composite Portland cement, mix evenly, add appropriate amount of water and stir to make a slurry, and evenly coat on 3.5cm×10cm×0.1cm The two sides of the rectangular iron sheet with rough surface were placed at room temperature for a period of time. After drying, the catalyst sheet was placed in a muffle furnace at 300°C for 1 hour, and then cooled with the furnace.

[0024] Intensity, water resistance and out-of-stock performance test methods and conditions are the same as in Example 1. When measuring the strength, the powder dropping rate is 7.25%, and when measuring the water resistance, the powder dropping rate is 14.58%. The denitrification performance test results are as follows: figure 2 In the #2 curve, at 250°C, the conversion rate of NOx is above 98%.

Embodiment 3

[0026] Take 5g MnO x -CeO x / TiO 2 Catalyst powder, 0.5g organic bentonite and 0.7g composite Portland cement are mixed evenly, add appropriate amount of water and stir to make a slurry, and evenly coat both sides of a rectangular aluminum sheet with a rough surface of 3.5cm×10cm×0.1cm. Stand at room temperature for a period of time, and after drying, put the catalyst sheet into a muffle furnace at 300°C for 1 hour, and then cool down with the furnace.

[0027] Intensity, water resistance and out-of-stock performance test methods and conditions are the same as in Example 1. When measuring the strength, the powder dropping rate is 6.02%, and when measuring the water resistance, the powder dropping rate is 15.56%. The denitrification performance test results are as follows: figure 2 In the #3 curve, at 275°C, the conversion rate of NOx is above 95%.

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Abstract

The invention discloses a binder, which comprises the following component contents in percentage by weight: 20-85 percent of bentonite and 15-80 percent of cement. The application of the binder in a catalyst for removing nitric oxide in smoke gas comprises the following steps of: fully mixing the binder with catalyst powder for removing the nitric oxide in the smoke gas according to the mass ratio of 0.18:1-0.25:1; adding water content, and mixing into slurry; and uniformly coating on slide glass, and drying at 150-300 DEG C. The binder is low in cost and is safe without toxicity, and the application method of the binder in the catalyst for removing the nitric oxide in the smoke gas is simple, and the prepared flakes have better denitration performance, with certain intensity and water resistance ensured at the same time.

Description

technical field [0001] The invention relates to a binder and its application in a catalyst for removing nitrogen oxides in flue gas. Background technique [0002] Nitrogen oxides (NO X ), mainly refers to nitric oxide (NO) and nitrogen dioxide (NO 2 ) has become the same as CO, SO 2 It is the main pollutant with the same name. It destroys the hemoglobin in human and animal blood, has a strong stimulating effect on human eyes and respiratory organs, and will react with hydrocarbons to form photochemical smog mainly composed of ozone, which constitutes serious pollution to the atmospheric environment. , causing emphysema, asthma, bronchitis, and even death. At the same time, NO X It is also one of the main causes of acid rain. Acid rain will cause widespread harm to the environment and cause huge economic losses. Therefore, countries to NO X Emission requirements are also becoming more stringent. [0003] Denitrification technologies mainly include selective catalytic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/16B01J23/34B01J23/30B01J23/22B01J23/745B01D53/86B01D53/56
Inventor 邱发敏郑军伟孙祖芳易志龙
Owner 浙江德纳希环保科技股份有限公司
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