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Quadruple-effect denitration agent composition and denitration method thereof

The technology of a denitrification agent and a composition is applied in the field of four-effect denitrification agent composition and denitration thereof, which can solve the problems of single denitration effect and low denitration rate, and achieve the effects of wide applicability, high denitration efficiency and overcoming large investment.

Active Publication Date: 2017-06-20
广东龙鼎环境科技工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the problems of too single denitrification effect and low denitrification rate in the above-mentioned existing denitrification technology, the present invention provides a four-effect denitrification agent composition and its denitrification method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Flue gas denitrification of circulating fluidized bed boiler in thermal power plant, NOx content is about 400mg / Nm 3 .

[0042] The four-effect denitration agent composition was prepared according to the following mass ratio: 20% ammonium carbonate, 20% ammonium bicarbonate, 10% methylamine, 15% ethylamine, 10% titanium dioxide, 10% manganese dioxide, 5% vanadium pentoxide %, diatomite 2%, ferric oxide 2%, fly ash 1%, rare earth elements 1%, zeolite powder 1%, kaolin 1%, sodium hydroxide 1%, sodium carbonate 1%; The steps of crushing, grinding, sieving and mixing are carried out to obtain the four-effect denitration agent composition.

[0043] Add 80kg of the above-mentioned four-effect denitration agent composition into the silo, control the temperature of the furnace at about 750°C, and send the denitrification agent to the furnace and NO X The flue gas is fully mixed into the denitrification reaction zone, and reacted with NOx at a mass ratio of 1:1. Aft...

Embodiment 2

[0044] Example 2: Flue gas denitrification of circulating fluidized bed boiler in thermal power plant, NOx content is about 400mg / Nm 3 .

[0045] The four-effect denitration agent composition was prepared according to the following mass ratio: 30% ammonium carbonate, 23% ammonium bicarbonate, 10% methylamine, 14% ethylamine, 5% titanium dioxide, 5% manganese dioxide, 5% vanadium pentoxide %, diatomite 1%, ferric oxide 1%, fly ash 1%, rare earth element 1%, zeolite powder 1%, kaolin 1%, sodium hydroxide 1%, sodium carbonate 1%; The steps of crushing, grinding, sieving and mixing are carried out to obtain the four-effect denitration agent composition.

[0046] Add 80kg of the above-mentioned four-effect denitration agent composition into the silo, control the temperature of the furnace at about 750°C, and send the denitrification agent to the furnace and NO X The flue gas is fully mixed into the denitrification reaction zone, and reacted with NOx at a mass ratio of 1:1. After ...

Embodiment 3

[0047] Example 3: The flue gas denitrification of the chain boiler in the salt factory, the NOx is about 300mg / Nm 3 .

[0048] The four-effect denitration agent composition was prepared according to the following mass ratio: 20% formamide, 20% acetamide, 10% methylamine, 15% ethylamine, 10% titanium dioxide, 10% manganese dioxide, 5% activated carbon, diatom 2% soil, 2% ferric oxide, 1% fly ash, 1% rare earth element, 1% zeolite powder, 1% kaolin, 1% sodium hydroxide, 1% sodium carbonate; crush and grind the above raw materials in sequence , sieving, and mixing processes to obtain a four-effect denitration agent composition.

[0049] Add 40kg of the above-mentioned four-effect denitrification agent into the silo, control the temperature of the furnace at about 550°C, send the denitrification agent to the furnace through the pneumatic conveying equipment, fully mix with the flue gas containing NOx and enter the denitrification reaction area, and the mass ratio to NOx is 1.2 :...

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Abstract

The invention discloses a quadruple-effect denitration agent composition and a denitration method thereof. A denitration agent is prepared from the following raw materials in parts by weight: 50-78% of reducing agent, 15-30% of catalyst, 1-10% of adsorbent, 1-10% of accelerant, 1-10% of dispersant, 1-10% of activating agent, 1-10% of penetrant, 1-10% of controlled release formulation and 1-10% of initiator. The denitration method comprises the following steps: (1) selecting raw materials, and through mixed working procedures of smashing, grinding, sieving and mixing, preparing the quadruple-effect denitration agent composition of claim 1 from the selected raw materials; (2) injecting the quadruple-effect denitration agent composition prepared in (1) into a denitration reaction area, causing the quadruple-effect denitration agent composition to react with NOx in smoke at the temperature of 500-800 DEG C, and generating CO, CO2, N2 and H2O. Compared with a traditional SCR (Selective Catalytic Reduction) method and an SNCR (Selective Non-Catalytic Reduction) method, the denitration method has the advantages of low reaction temperature, good reaction selectivity, high denitration efficiency and the like.

Description

technical field [0001] The invention relates to the field of denitrification in a furnace, in particular to a four-effect denitrification agent composition and a denitrification method thereof. Background technique [0002] With the rapid development of my country's economy, energy consumption is increasing, and sulfur dioxide (SO 2 ) and nitrogen oxides (NOx) have increased sharply, resulting in more and more serious air pollution in my country. my country is a country where coal is the main fuel. Sulfur dioxide, nitrogen oxides and soot in coal-burning flue gas have caused serious air pollution. At present, my country has formulated strict emission standards for the emissions of medium and large boilers, and is also implementing ultra-low emission standards and is steadily implementing them. However, there are still a large number of industrial coal-fired boilers that are small-tonnage steam and hot water boilers such as chain furnaces, biomass boilers, and coal-water sl...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56B01D53/02
CPCB01D53/02B01D53/8628B01D53/90B01D2251/2067B01D2251/21B01D2251/606B01D2255/20707B01D2255/20723B01D2255/2073B01D2255/702
Inventor 肖世新范正伟
Owner 广东龙鼎环境科技工程有限公司
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