Preparation process of flue gas desulfurization and denitration material

A technology for desulfurization and denitrification, flue gas, applied in the field of preparation of flue gas desulfurization and denitrification materials, can solve the problems that cannot meet industrial applications, do not consider material production, material forming properties, shape, size, etc.

Inactive Publication Date: 2007-02-28
TIANJIN CHEM RES & DESIGN INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The results reported in these literatures are only from the laboratory stage, without considering the problems in industrial appl

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  • Preparation process of flue gas desulfurization and denitration material

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Experimental program
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Embodiment 1

[0027] 1977.2 grams of industrial magnesium nitrate, 476.5 grams of industrial aluminum nitrate, dissolved in deionized water to a specific gravity of 1.116; 526.5 grams of sodium hydroxide, 370.4 grams of sodium carbonate, dissolved in deionized water to a specific gravity of 1.147. Under stirring conditions, the two solutions were neutralized at a flow rate of 4L / min, the temperature of the reaction precipitation solution was 60°C, the pH was adjusted to 8.0, the precipitation time was 2.5 hours, and the aging time was 50min. The product was filtered, washed and dried , to obtain a white powder. Take 100g of powder, mix with 5g of kaolin, 10g of pseudoboehmite and 1g of turnip powder, add 3% nitric acid solution to make a spherical carrier with a diameter of 2mm. The shaped carrier was calcined at 400°C for 2 hours, the measured strength was 30N / m, and the specific surface was 100m 2 / g, the pore volume is 0.7cc / g. The adsorption capacity of nitrogen oxides in flue gas at ...

Embodiment 2

[0029] Replace magnesium nitrate with industrial copper nitrate, and other processes are with embodiment 1. Under stirring conditions, the two solutions were neutralized at a flow rate of 6 L / min in parallel, the temperature of the reaction precipitation solution was 80° C., the pH was adjusted to 10, the precipitation time was 1.5 hours, and the aging time was 60 minutes. Take 100g of powder, mix with 10g of kaolin, 3g of silica sol and 2g of turnip powder, and add 2% nitric acid solution. A spherical carrier with a diameter of 1 mm was made. The shaped carrier was calcined at 400°C for 5 hours, the measured strength was 40N / m, and the specific surface was 223m 2 / g, the pore volume is 1.3cc / g. The adsorption capacity of nitrogen oxides in flue gas at room temperature is 1250mg / g, and the adsorption capacity of sulfur dioxide in flue gas at 550°C is 1489mg / g.

Embodiment 3

[0031] Replace magnesium nitrate with industrial zinc nitrate, and other processes are with embodiment 1. Under stirring conditions, the two solutions were neutralized at a flow rate of 5 L / min in parallel, the temperature of the reaction precipitation solution was 70° C., the pH was adjusted to 8.8, the precipitation time was 2 hours, and the aging time was 70 minutes. Take 100g of powder, mix with 10g of kaolin, 2g of aluminum sol and 2g of methyl cellulose, add 3% nitric acid solution to make a spherical carrier with a diameter of 2mm, and calcinate the shaped carrier at 400°C for 3.5 hours. The measured strength is 60N / m, and the specific surface is 130m 2 / g, the pore volume is 1.6cc / g. The adsorption capacity of nitrogen oxides in flue gas at room temperature is 1352mg / g, and the adsorption capacity of sulfur dioxide in flue gas at 550°C is 1180mg / g.

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Abstract

The invention discloses a preparing method of smoke desulfurizing and denitration material in the environmental protective material technological domain, which comprises the following steps: adopting parallel current method to co-sediment composite liquid with bivalent metal Cu, Mg and Zn and multipartial metal Al, Fe and Co with sodium hydroxide and sodium carbonate solution to form waterlike talc material, pulping, blending caoline, silica gel, satin diaspore and alhydrogel, adding sesban powder and or methyl cellulose, preparing the moulding carrier, sintering to obtain the smoke desulfurizing denitration material, regenerating adsorbing liquid through denitrating to prepare diluted nitric acid, reducing sulfur dioxide after saturated adsorption through hydrogen to prepare sulphur.

Description

technical field [0001] The invention relates to the technical field of new environmental protection materials, and relates to a method for preparing flue gas desulfurization and denitrification materials. technical background [0002] Hydrotaleite-like compounds are natural clay-like materials with a layered microporous structure. They have a large specific surface area and exchangeable anions between layers. Hydroxy metal composite oxide, in which Mg 2+ and Al 3+ Ions can be replaced by other equivalent ions to form new hydrotalcites. Hydrotalcite can be used in flame retardants, stabilizers, catalysts and carriers for plastics, rubber, and polymer materials, ion exchangers, adsorbents, wastewater treatment agents, new types of sterilization, magnetic materials, medicine, and environmental protection. The expansion of the research field has new applications in functional polymers, nanomaterials, cosmetics, etc. [0003] SO in flue gas 2 and NO x It is the main polluta...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/16B01D53/56
Inventor 程志林赵训志马群于海斌成宏
Owner TIANJIN CHEM RES & DESIGN INST
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