Catalyst composition for improving boiler heat efficiency and reducing nitrogen oxide emission

A technology for boiler thermal efficiency and nitrogen oxides, which is applied in the field of boiler energy saving, can solve the problems of high mechanical heat loss, easy deactivation and poisoning of denitration catalysts, etc., and achieves the effect of improving service life, good combustion-supporting effect, and improving catalytic activity.

Pending Publication Date: 2020-06-30
山西恒投环保节能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides that the present invention solves the problems of high mechanical incomplete combustion heat loss and easy deactivation and poisoning of existing denitrification catalysts in the combustion process of circulating fluidized bed boilers, and uses tourmaline and titanium dioxide to form surface electrons - The cavity structure greatly improves the catalytic activity, effectively improves the denitrification efficiency, and reduces the carbon content of circulating fluidized bed boiler ash

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of described catalyst composition, comprises the steps:

[0020] Step 1. Add aluminum hydroxide powder and graphene powder to absolute ethanol for low-temperature ultrasonication for 20-40 minutes, then add tourmaline powder and stir for 30-50 minutes to obtain a mixed suspension; the concentration of aluminum hydroxide powder in absolute ethanol 30-100g / L, the addition of the graphene powder is 80-90% of the aluminum hydroxide powder, the addition of the tourmaline powder is 30-40% of the aluminum hydroxide quality, the graphene powder , aluminum hydroxide powder and tourmaline powder are micron-sized particles, the temperature of the low-temperature ultrasonic is 5-10 ° C, the ultrasonic frequency is 100-200 kHz, and the stirring speed is 1000-2000 r / min; aluminum hydroxide powder, graphene powder Both aluminum hydroxide powder and tourmaline powder are insoluble in absolute ethanol, and can form a good suspension system. Use low-temperature ult...

Embodiment 1

[0026] A catalyst composition for improving boiler thermal efficiency and reducing nitrogen oxide emissions, which uses activated alumina and graphene as composite supports, manganese dioxide and titanium dioxide as active components, and tourmaline as auxiliary active components.

[0027] The preparation method of described catalyst composition, comprises the steps:

[0028] Step 1: Add aluminum hydroxide powder and graphene powder to absolute ethanol and sonicate at low temperature for 20 minutes, then add tourmaline powder and stir for 30 minutes to obtain a mixed suspension; the concentration of aluminum hydroxide powder in absolute ethanol is 30g / L , the addition of the graphene powder is 80% of the aluminum hydroxide powder, the addition of the tourmaline powder is 30% of the aluminum hydroxide quality, and the graphene powder, aluminum hydroxide powder and tourmaline powder are all Micron-sized particles, the temperature of the low-temperature ultrasonic is 5°C, the ult...

Embodiment 2

[0036] A catalyst composition for improving boiler thermal efficiency and reducing nitrogen oxide emissions, which uses activated alumina and graphene as composite supports, manganese dioxide and titanium dioxide as active components, and tourmaline as auxiliary active components.

[0037] The preparation method of described catalyst composition, comprises the steps:

[0038] Step 1: Add aluminum hydroxide powder and graphene powder to absolute ethanol and sonicate at low temperature for 40 minutes, then add tourmaline powder and stir for 50 minutes to obtain a mixed suspension; the concentration of aluminum hydroxide powder in absolute ethanol is 100g / L , the addition of the graphene powder is 90% of the aluminum hydroxide powder, the addition of the tourmaline powder is 40% of the aluminum hydroxide quality, and the graphene powder, aluminum hydroxide powder and tourmaline powder are all Micron-sized particles, the temperature of the low-temperature ultrasonic is 10°C, the u...

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PUM

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Abstract

The invention belongs to the field of boiler energy conservation, and particularly relates to a catalyst composition for improving boiler heat efficiency and reducing nitrogen oxide emissions; activated aluminum oxide and graphene are used as composite carriers, manganese dioxide and titanium dioxide are used as active ingredients, and tourmaline is used as an auxiliary active ingredient. The invention also provides a preparation method of the catalyst. The problems that in the combustion process of a circulating fluidized bed boiler, mechanical incomplete combustion heat loss is too high, andan existing denitration catalyst is prone to inactivation and poisoning are solved, tourmaline and titanium dioxide are used for forming a surface electron-hole structure, the catalytic activity is greatly improved, the denitration efficiency is effectively improved, and the carbon content of ash of the circulating fluidized bed boiler is reduced.

Description

technical field [0001] The invention belongs to the field of boiler energy saving, and in particular relates to a catalyst composition for improving boiler thermal efficiency and reducing nitrogen oxide emissions. Background technique [0002] Nitrogen oxides (NO X ) is one of the main pollutants in the atmospheric environment, which can cause pollution such as acid rain and photochemical smog, and has great harm to human health and the ecological environment. NO X It mainly comes from the flue gas produced by the combustion of dyes, mainly NO, accounting for about X More than 90% of the total, followed by NO 2 . As of 2012, my country's NO X The emissions exceeded 21.94 million tons, becoming the world's No. X emitter country. With the current pollutant emission level, by 2020, NO X emissions will reach 30 million tons. Statistics show that my country's NO X The growth of emissions has led to the transformation of acid rain pollution from sulfuric acid type to sul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/92B01D53/86B01D53/56
CPCB01J23/34B01J23/92B01D53/8628
Inventor 齐恒
Owner 山西恒投环保节能科技有限公司
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