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Method for removing acid gas from waste gas

A technology for acid gas and waste gas, applied in the fields of SOx, Hg and NOx, which can solve the problem of high cost

Inactive Publication Date: 2010-07-28
LEXTRAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, the cost of processes and equipment to reduce pollution remains high, so considerable effort is devoted to research to improve the efficiency of known methods and to discover new ones that are more effective and use less energy.

Method used

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  • Method for removing acid gas from waste gas
  • Method for removing acid gas from waste gas
  • Method for removing acid gas from waste gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] A glass column with a height of 400mm and a diameter of 30mm was heated to 80°C using an external electric heater. The glass column was filled with a glass ring with a height of 4 mm and a diameter of 4 mm and a mixture of water, magnesium oxide and sulfoxide in a weight ratio of 40%:10%:50%.

[0073] Continuously feed air (0.33 L / min) diluted SO from the bottom of the column 2 (850 ppm; 0.15 L / min) air flow with a contact time of 5.0 seconds with the wash mixture. The experiment lasted for 420 minutes and no SO was emitted 2 , thus proving that all SO 2 are collected.

Embodiment 2

[0075] A glass column with a height of 400mm and a diameter of 30mm was heated to 80°C using an external electric heater. The glass column was filled with a glass ring with a height of 4 mm and a diameter of 4 mm and a mixture of water, magnesium oxide and sulfoxide in a weight ratio of 65%:5%:30%.

[0076] Diluted SO was continuously fed with air (0.33 L / min) through the bottom of the column. 2 (850 ppm; 0.15 L / min) air flow with a contact time of 5.0 seconds with the wash mixture. The experiment lasted 240 minutes, no SO was emitted 2 , thus proving that all SO 2 are collected.

Embodiment 3

[0078] A glass column with a height of 400mm and a diameter of 30mm was heated to 80°C using an external electric heater. The glass column was filled with a glass ring with a height of 4 mm and a diameter of 4 mm and a mixture of water, potassium hydroxide and sulfoxide in a weight ratio of 40%:10%:50%.

[0079] Continuously feed air (0.33 L / min) diluted SO from the bottom of the column 2 (840 ppm; 0.15 L / min) air flow with a contact time of 5.0 seconds with the wash mixture. The experiment lasted for 420 minutes and no SO was emitted 2 , thus proving that all SO 2 are collected.

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Abstract

The invention relates to a method for removing an acid gas from a waste gas. In the method, sulfur oxide, nitric oxide or mercury vapour as the acid gas is removed before the waste gas is discharged into the atmosphere by enabling the waste gas to be in contact with a composition containing organic sulfoxide.

Description

technical field [0001] The present invention relates to a method for removing acid gases from exhaust gases. More specifically, the present invention relates to a method for the removal of acid gases, especially SO, by contacting the exhaust gas with an emulsion of water in organic sulfoxides, especially an emulsion of water in oil-derived sulfoxides. x , Hg and NO x Methods. By allowing the emulsion to settle and separate into two phases, the organic sulfoxide phase can be regenerated after the emulsion has been loaded with contaminants. The aqueous phase obtained after separation contains sulfate and nitrate ions, which can be collected and used as valuable chemicals. Background technique [0002] Industrially developed countries produce hundreds of millions of tons of air pollutants, a large portion of which comes from the burning of coal, oil and gasoline in power plants. Other major sources of air pollution include oil refineries, cement plants and petrochemical pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/79
Inventor 阿道夫·希特里克格雷戈里·皮普科多伦·本杰明
Owner LEXTRAN
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