Catalyst component and method for removing sulfur oxides and nitric oxides from smoke

A nitrogen oxide and sulfur oxide technology is applied in the field of flue gas purification, which can solve the problems of high energy consumption and complex process, and achieve the effects of low operating cost, simple process and low operating cost.

Active Publication Date: 2013-08-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above-mentioned many patent methods, although the sulfur oxides and nitrogen oxides in the flue gas can be effectively removed simultaneously, there are some deficiencies: 1) It is necessary to inject reducing substances such as ammonia, refinery

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  • Catalyst component and method for removing sulfur oxides and nitric oxides from smoke

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[0045] Example 1

[0046] A total of 200 g of catalysts were loaded into the moving bed reactor, wherein spent FCC catalyst accounted for 35% by weight, auxiliary catalyst accounted for 5% by weight, activated carbon accounted for 40% by weight, and calcium oxide accounted for 20% by weight. Under the Ar flow, the temperature was raised to 400°C, the Ar gas was stopped, and NO, O 2 , Ar mixed gas, SO in the mixed gas 2 The concentration is 2500mg / m 3 , NO concentration is 1250mg / m 3 , O 2 The concentration is 3.7% (v), the rest is Ar, and the air velocity of the mixed gas is 5500h -1 , using a multifunctional flue gas analyzer to analyze the content of sulfur oxides and nitrogen oxides in the gas after the reaction, and calculate the removal efficiency of sulfur oxides and nitrogen oxides according to formula (1) to be 82.4% and 72.6% respectively.

Example Embodiment

[0047] Example 2

[0048] By the method for embodiment 1, add the FCC waste catalyst of same quality, same ratio, auxiliary catalyst, gac and calcium oxide, under the same space velocity, pass into the mixed gas that forms identical, reaction temperature is raised to 500 ℃, according to ( 1) The efficiency of removing sulfur oxides and nitrogen oxides calculated by formula is 84.6% and 83.5% respectively.

Example Embodiment

[0049] Example 3

[0050] By the method for embodiment 1, add the same quality, the FCC waste catalyst of identical ratio, auxiliary catalyst, gac and calcium oxide, under the same space velocity, pass into the mixed gas that forms identical, reaction temperature is raised to 580 ℃, according to ( 1) The efficiencies of removing sulfur oxides and nitrogen oxides calculated by the formula are 87.3% and 85.7% respectively.

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Abstract

The invention discloses a catalyst component and method for removing sulfur oxides and nitric oxides from smoke. The smoke containing the sulfur oxides and the nitric oxides passes through a fluidized bed reactor with a nitric oxide removing reducing agent, a catalyst and a calcium-based adsorbing material so as to remove the sulfur oxides and nitric oxides from the smoke, wherein the catalyst comprises a fluid catalytic cracking dead catalyst playing a main catalyst role and an auxiliary catalyst playing an auxiliary catalyst role; and the nitric oxide removing reducing agent is a solid carbon reducing agent, and the calcium-based adsorbing material is calcined lime or slaked lime. The sulfur oxides and the nitric oxides are removed in the same reactor at the same temperature, the process is simple, and the operating cost is relatively low; and meanwhile, the method has the advantages that the reaction temperature range is wide, the catalyst is not influenced by the erosive wear of smoke dust and the pollution of impurities in fly ash, and the like.

Description

technical field [0001] The invention belongs to the field of flue gas purification, in particular to a catalyst for simultaneously removing sulfur oxides and nitrogen oxides in flue gas. Background technique [0002] Sulfur oxides (also known as SOx) and nitrogen oxides (also known as NOx) are the main pollutants in the air and are the main substances that form acid rain. Most of the existing methods for removing sulfur oxides and nitrogen oxides are carried out step by step, either removing sulfur oxides or nitrogen oxides first. In the removal of flue gas sulfur oxides, it can be divided into two categories: wet method and dry method. The wet method mainly uses acid-base neutralization reaction. The wet method accounts for more than 80% of the world market. Among them, the calcium method is the main method. The advantages of calcium desulfurization are high desulfurization efficiency and high utilization rate of desulfurizer, but there are also problems such as easy scal...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01D53/60B01D53/86
CPCY02A50/20
Inventor 齐文义秦如意黄新龙王洪彬王少锋王懿洛
Owner CHINA PETROLEUM & CHEM CORP
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