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Denitrification filter material for absorbing ammonia and nitrogen and regenerating method thereof

A technology for adsorbing ammonia and filter material, applied in the chemical industry, can solve the problems of complex regeneration process, poor adsorption effect of ammonia nitrogen, etc., and achieves a large adsorption specific surface area, large internal voids, and low attenuation and aging of adsorption performance and mechanical performance. Effect

Active Publication Date: 2012-07-25
JIANGSU HUASHAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a denitrification filter material for adsorbing ammonia nitrogen and its regeneration method for the problems of poor ammonia nitrogen adsorption effect and complex regeneration process in the prior art.

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  • Denitrification filter material for absorbing ammonia and nitrogen and regenerating method thereof
  • Denitrification filter material for absorbing ammonia and nitrogen and regenerating method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The raw material composition of the denitrification filter material (weight percentage): 30% activated alumina, 20% magnesium carbonate, 25% 80 micron ball clay, 10% potassium carbonate, 5% sodium chloride, 3% iron oxide, 7% silicon oxide .

[0022] The preparation method of the denitrification filter material: After mixing the raw materials, add the composite mineralizer, and then the mixture is heated to 700°C at a rate of 10°C / min in an oxygen atmosphere to keep the reaction for 1 hour and 1000°C for 1 hour. Keep at 1100°C for 1 hour, 1250°C for 30 minutes, and finally heat up to 1320°C for 1 hour for natural accumulation. The filter material has a microporous structure greater than 50%. The filter material after natural accumulation is washed twice; Compound mineralizer is BaCO 3 With TiO 2 The mixing composition has a weight ratio of 2:3, and the added amount of the composite mineralizer is 2.6% of the total weight of the above raw materials.

[0023] Denitrification f...

Embodiment 2

[0025] The raw material composition of the denitrification filter material (weight percentage): activated alumina 20%, magnesium carbonate 21%, 100 micron ball clay 28%, potassium carbonate 12%, sodium chloride 6%, iron oxide 5%, silicon oxide 8% .

[0026] The preparation method of the denitrification filter material: After mixing the raw materials, add the composite mineralizer, and then the mixture is heated to 700°C at a rate of 10°C / min in an oxygen atmosphere to keep the reaction for 1 hour and 1000°C for 1 hour. Keep at 1100°C for 1 hour, 1250°C for 30 minutes, and finally heat up to 1320°C for 1 hour for natural accumulation. The filter material has a microporous structure greater than 50%. The filter material after natural accumulation is washed twice; Compound mineralizer is BaCO 3 With TiO 2 The mixing composition has a weight ratio of 2:3, and the added amount of the composite mineralizer is 1.5% of the total weight of the above raw materials.

[0027] Denitrification ...

Embodiment 3

[0029] The raw material composition of the denitrification filter material (weight percentage): 15% activated alumina, 30% magnesium carbonate, 25% 100 micron ball clay, 15% potassium carbonate, 3% sodium chloride, 6% iron oxide, 6% silicon oxide .

[0030] The preparation method of the denitrification filter material: After mixing the raw materials, add the composite mineralizer, and then the mixture is heated to 650°C at a rate of 8°C / min in an oxygen atmosphere to keep the reaction for 1 hour and 950°C for 1 hour. Keep at 1200°C for 1 hour, 1300°C for 20 minutes, and finally heat up to 1350°C for 1 hour for natural accumulation. The filter material has a microporous structure greater than 50%. The filter material after natural accumulation is washed twice; Compound mineralizer is BaCO 3 With TiO 2 The mixed composition has a weight ratio of 2.5:3, and the added amount of the composite mineralizer is 4% of the total weight of the above raw materials.

[0031] Denitrification fil...

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Abstract

The invention discloses denitrification filter material for absorbing ammonia and nitrogen and a regenerating method of the denitrification filter material. The filter material comprises the following raw materials: 20-35% of activated aluminum oxide, 15-30% of magnesium carbonate, 25-30% of ball clay, 8-15% of potassium carbonate, 2-6% of sodium chloride, 2-6% of iron oxide and 3-8% of silicon oxide. The denitrification filter material is formed by mixing and roasting various natural mineral powder and metallic oxide, is high in using efficiency, convenient and low in cost, and solves the problems that the filter material can not be utilized repeatedly for a long time and the regenerating process of the filter material is complicated in the prior art.

Description

Technical field [0001] The invention belongs to the field of chemical industry, and specifically relates to a denitrification filter material for adsorbing ammonia nitrogen and a regeneration method thereof. Background technique [0002] As an important element of organic life, nitrogen has a cyclic process in the natural environment. Due to the concentration of urban population and the relatively unfavorable urban sewage treatment capacity, as well as the extensive use of chemical fertilizers in agricultural production, the ammonia nitrogen in the surface water has reached a high concentration. In 2007, according to environmental statistics, 1.324 million tons of ammonia nitrogen in wastewater was discharged nationwide (excluding agricultural sources). Among them, industrial ammonia nitrogen emissions were 341,000 tons, accounting for about 26% of total ammonia nitrogen emissions. The discharge of ammonia nitrogen from urban households was 983,000 tons, accounting for more tha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/12B01J20/34C02F1/28C02F101/16
Inventor 董阳李祖华王红琴刁晓丽
Owner JIANGSU HUASHAN ENVIRONMENTAL PROTECTION TECH
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