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Flue gas absorbent of desulfurization and denitrification, and desulfurization and denitrification method thereof

A technology for desulfurization, denitrification, and flue gas, which is applied in the field of flue gas purification, can solve problems affecting fertilizer quality, etc., and achieve the effects of rapid desorption, high desulfurization and denitrification rate, and low desorption energy consumption

Inactive Publication Date: 2015-03-25
JIANGHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both ammonium sulfate and ammonium nitrate can be used as fertilizers, but these types of fertilizers will carry a small amount of heavy metals in the smoke and dust, which will affect the quality of fertilizers

Method used

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  • Flue gas absorbent of desulfurization and denitrification, and desulfurization and denitrification method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 70 grams of absorption component ethylpiperazine, 2 grams of activation component diazabicyclo, 20 grams of reducing component urea, 0.1 gram of corrosion inhibitor sodium vanadate and 0.1 gram of antioxidant 4-tert-butylcatechol, Add water to 500 grams, stir evenly, adjust the acidity of the solution with 0.1 mol / liter sulfuric acid solution, and quantify it to 1000 grams with distilled water, control the pH value of the above solution to 6.5, and obtain the flue gas desulfurization and denitrification agent 1 of the present invention. The ionization constant pKa of the absorbing component is 7.

[0019] The composition (volume) of the simulated flue gas is: CO 2 : 14.4%; O 2 : 9.5%; H 2 O: 10.4%; SO 2 : 1.2%; CO: 1.1%; NO: 0.2%, H 2 S: 110mg / Nm 3 , and the rest is nitrogen.

[0020] First heat 1000 grams of desulfurization and denitrification agent 1 to 50°C, then pump the desulfurization and denitrification agent 1 from the upper end of the packed absorption to...

Embodiment 2

[0023] 10 grams of the absorption component dropropizine, 0.1 grams of the activation component diazabicyclo, 5 grams of the reducing component urea, 0.005 grams of the antioxidant N, N-bis(2-hydroxyethyl) glycine and 1 gram of the Potassium metaaluminate etchant, add water to 500 grams, stir evenly, adjust the acidity of the solution with 0.1 mol / liter phosphoric acid solution, and quantify it to 1000 grams with distilled water, control the pH value of the above solution to 7.0, and obtain the cigarette smoke of the present invention Gas desulfurization and denitrification agent 2. The ionization constant pKa of the absorbing component is 6.

[0024] The composition (volume) of the simulated flue gas is: CO 2 : 14.4%; O 2 : 9.5%; H 2 O: 10.4%; SO 2 : 1.2%; CO: 1.1%; NO: 0.2%, H 2 S: 110mg / Nm 3 , and the rest is nitrogen.

[0025] First heat 1000 grams of desulfurization and denitrification agent 2 to 30°C, then pump the desulfurization and denitrification agent 2 from ...

Embodiment 3

[0028] 80 grams of absorption component N-hydroxyethylpiperazine, 10 grams of activation component diazabicyclo, 100 grams of reduction component urea, 0.005 grams of antioxidant diphenylamine, 0.005 grams of antioxidant p-phenylenediamine and 0.025 grams Corrosion inhibitor sodium dihydrogen phosphate, add water to 500 grams, stir evenly, adjust the acidity of the solution with 0.1 mol / liter boric acid solution, and quantify it to 1000 grams with distilled water, control the pH value of the above solution to 5.5, and obtain the present invention Flue gas desulfurization and denitrification agent 3. The ionization constant pKa of the absorbing component is 5.

[0029] The composition of the simulated flue gas is (volume): CO 2 : 15.2%; O 2 : 10.3%; H 2 O: 7.6%; SO 2 : 6.1%, NO: 0.5%, and the rest is nitrogen.

[0030] After heating 1000 grams of desulfurization and denitrification agent 3 to 40°C, pump the desulfurization and denitrification agent 3 into the supergravity ...

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Abstract

The invention provides a flue gas absorbent of desulfurization and denitrification and a desulfurization and denitrification method thereof. The flue gas absorbent of desulfurization and denitrification is prepared from the following components in percentage by weight: 2%-40% of an absorbing component, 0.02%-10% of an active component, 1%-20% of a reducing component, 0.001%-0.1% of an antioxidant and the balance of water, wherein the pH value of the absorbent of desulfurization and denitrification is 3.5-7; the absorbing component is one or more of piperazine and derivatives thereof; the active component is diazabicyclo; and the reducing component is urea. According to the flue gas absorbent of desulfurization and denitrification, provided by the invention, NOx in the flue gas can be effectively reduced into nitrogen, and SO2 is desorbed and regenerated after being absorbed, so as to obtain pure SO2. The flue gas absorbent of desulfurization and denitrification is high in desulfurization and denitrification rate, rapid to desorb, high in desorption rate, and relatively low in desorption energy consumption, and has high practicability.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a flue gas desulfurization and denitrification agent and a desulfurization and denitrification method thereof. Background technique [0002] The flue gas or industrial tail gas discharged from thermal power plants, metallurgy, and chemical industries in China contains pollutants such as sulfur dioxide and nitrogen oxides, which have become the main source of air pollution. With the gradual popularization of scientific development concepts such as "circular economy, clean production, and harmonious society", the country's increasing emphasis on air pollution caused by sulfur dioxide and nitrogen oxides, and the formulation and implementation of relevant environmental protection laws and regulations, the treatment of sulfur dioxide containing It is imperative to work on flue gas pollution of nitrogen oxides. At present, there are many flue gas or industrial tail gas pollution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60B01D53/96
CPCY02A50/20
Inventor 路平余国贤
Owner JIANGHAN UNIVERSITY
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