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Efficient denitration agent for waste gas treatment and preparation method thereof

A waste gas treatment and denitration agent technology, applied in the direction of separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of affecting the adsorption efficiency, the decrease of the adsorption efficiency, and the unfavorable popularization and application, so as to reduce the production cost and simplify the processing process , the effect of a wide range of application prospects

Inactive Publication Date: 2021-12-24
LIAONING JET ENG ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the existing denitrification treatment, the denitrification agent is mostly applied in the form of physical adsorption. This method is simple to operate, the preparation cost of the denitrification agent is low, and the requirements for the adsorption equipment are not high; however, the preparation process of the denitrification agent in the prior art is relatively complicated. The process will affect the adsorption efficiency; in addition, the poor thermal stability of the denitrification agent carrier causes the denitrification agent to be unable to withstand the high temperature exhaust gas treatment environment, which limits its application; the low load rate of the denitrification agent carrier will easily lead to a decrease in adsorption efficiency and increase the usage. Increase the cost of waste gas treatment, which will put a lot of pressure on enterprises, which is not conducive to popularization and application

Method used

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  • Efficient denitration agent for waste gas treatment and preparation method thereof

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Embodiment 1

[0019] A method for preparing a high-efficiency denitration agent for waste gas treatment, comprising the following steps:

[0020] (1) Add butyl titanate to 45 parts of graphene oxide, mix uniformly; The consumption ratio of graphene oxide and liquid precursor is 1g:10mL;

[0021] (2) Add 15 parts of limestone powder, 12 parts of nano-scale calcium oxide, 6 parts of nano-scale magnesium oxide, 5 parts of titanium dioxide, 2 parts of sodium carbonate in the mixture of step (1); after mixing evenly, dip for 48h, after dipping finishes, reduce pressure distillation until the liquid content is below 8%, and then sintered at 350°C for 5 hours to obtain the denitration agent carrier;

[0022] (3) Then add ammonium chloride and ammonia water with a mass fraction of 18wt%. The ratio of ammonium chloride to ammonia water is 1g:6mL. After mixing evenly, soak for 6 hours. After the completion of the granulation, a high-efficiency denitrification agent for waste gas treatment is obtaine...

Embodiment 2

[0024] A method for preparing a high-efficiency denitration agent for waste gas treatment, comprising the following steps:

[0025] (1) Add alkanolamide to 50 parts of graphene oxide, mix uniformly; The consumption ratio of graphene oxide and liquid precursor is 1g:15mL;

[0026] (2) Add 20 parts of limestone powder, 18 parts of nano-scale calcium oxide, 8 parts of nano-scale magnesium oxide, 1 part of titanium dioxide, 5 parts of sodium carbonate in the mixture of step (1); dipping 48h after mixing evenly, reduce after dipping finishes pressure distillation until the liquid content is below 8%, and then sintered at 350°C for 5 hours to obtain the denitration agent carrier;

[0027] (3) Then add urea and ammonia water with a mass fraction of 5wt%, the dosage ratio of urea and ammonia water is 1g:10mL, mix evenly and impregnate for 6 hours, dry at 120°C to constant weight after impregnation, and granulate after loading , to obtain a high-efficiency denitrification agent for wa...

Embodiment 3

[0029] A method for preparing a high-efficiency denitration agent for waste gas treatment, comprising the following steps:

[0030] (1) Add butyl titanate to 45 parts of graphene oxide, mix uniformly; The consumption ratio of graphene oxide and liquid precursor is 1g:15mL;

[0031] (2) Add 15 parts of limestone powder, 12 parts of nano-scale calcium oxide, 8 parts of nano-scale magnesium oxide, 5 parts of titanium dioxide, 2 parts of sodium carbonate in the mixture of step (1); after mixing evenly, dip for 72h, after dipping finishes, reduce pressure distillation until the liquid content is below 5%, and then sintered at 500°C for 8 hours to obtain the denitration agent carrier;

[0032] (3) Then add ammonium chloride and ammonia water with a mass fraction of 18wt%, the ratio of ammonium chloride to ammonia water is 1g:6mL, mix evenly and soak for 10h, dry to constant weight at 120°C after immersion, load After the completion of the granulation, a high-efficiency denitrificat...

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Abstract

The invention discloses an efficient denitration agent for waste gas treatment and a preparation method thereof, and belongs to the technical field of waste gas treatment. The preparation method comprises the following steps: adding a liquid precursor into graphene oxide, and uniformly mixing; then adding limestone powder, nanoscale calcium oxide, nanoscale magnesium oxide, titanium dioxide and sodium carbonate; carrying out procedures of dipping, reduced pressure distillation and sintering to obtain a denitration agent carrier; and then adding a denitration agent and ammonia water, carrying out impregnation and drying processes, loading on the denitration agent carrier, and granulating to obtain the efficient denitration agent for waste gas treatment. According to the invention, the denitration agent adopts modified graphene as a carrier, wherein the raw materials are cheap and easy to obtain, the process is simple, and the production cost is greatly reduced; and the adsorbent has high thermal stability and adsorption efficiency, the adsorption efficiency can still reach 95% when high-temperature waste gas is treated, the high-temperature waste gas reaches the emission standard, the treatment process is simple, and the efficient denitration agent has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a high-efficiency denitration agent for waste gas treatment and a preparation method thereof. Background technique [0002] The exhaust gas emitted from industrial production often contains a large amount of nitrate-containing compounds, which react with water in the air to form nitric acid and nitrous acid, thus causing acid rain pollution. Acid rain is extremely harmful to the ecological environment and crops. How to effectively reduce the emission of nitrate-containing waste gas has become an urgent problem to be solved. [0003] In the existing denitrification treatment, the denitrification agent is mostly applied in the form of physical adsorption. This method is simple to operate, the preparation cost of the denitrification agent is low, and the requirements for the adsorption equipment are not high; however, the preparation process of the denitrific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02B01D53/56B01D53/81
CPCB01J20/041B01J20/043B01J20/20B01J20/06B01J20/22B01D53/02B01D53/565
Inventor 魏久鸿魏钰珊冯艳峰魏丽燕冯忠马天然
Owner LIAONING JET ENG ENERGY TECH CO LTD
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