Mixed solution for simultaneously desulfurizing and denitrating and application method thereof

A technology of mixed solutions and application methods, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as high operating costs, unfavorable promotion, and unsatisfactory desulfurization and denitrification effects, and achieve moderate prices.

Inactive Publication Date: 2010-02-24
NANKAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above processes all require large investment and high operating costs, and the effect o...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Na entering the absorption tower per unit time 2 CO 3 and the SO in the flue gas entering the absorption tower per unit time 2 The molar ratio is 1.2; NaClO enters the absorption tower per unit time 2 And when the molar ratio of NOx in the flue gas entering the absorption tower per unit time is 3. Na in the prepared absorption solution 2 CO 3 The mass concentration is at 5%, and the absorption solution NaClO configured 2 At a mass concentration of 1%, SO in the flue gas 2 The removal rate is above 80%, and the denitrification efficiency is 15-35%.

Embodiment 2

[0015] Na entering the absorption tower per unit time 2 CO 3 and the SO in the flue gas entering the absorption tower per unit time 2 The molar ratio is 1.5; NaClO enters the absorption tower per unit time 2 And when the molar ratio of NOx in the flue gas entering the absorption tower per unit time is 5. Na in the prepared absorption solution 2 CO 3 The mass concentration is 8%, the absorption solution NaClO of configuration 2 At a mass concentration of 2.5%, SO in the flue gas 2 The removal rate is above 90%, and the denitrification efficiency is 30-50%.

Embodiment 3

[0017] Na entering the absorption tower per unit time 2 CO 3 and the SO in the flue gas entering the absorption tower per unit time 2 The molar ratio is 1.5; NaClO enters the absorption tower per unit time 2 And when the molar ratio of NOx in the flue gas entering the absorption tower per unit time is 10. Na in the prepared absorption solution 2 CO 3 The mass concentration is at 5%, and the absorption solution NaClO configured 2 At a mass concentration of 5%, SO in the flue gas 2 The removal rate is above 95%, and the denitrification efficiency is 70-80%.

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Abstract

The invention belongs to the technical field of environmental protection, and relates to the technology of simultaneously removing sulphur dioxide and oxynitride in flue gas of a boiler, in particularto a mixed solution for simultaneously desulfurizing and denitrating and an application method thereof. The mixed solution is characterized in that: the mixed solution is prepared from the followingchemical compositions: 0 to 30 mass percent of sodium carbonate solution and 0 to 30 mass percent of sodium chlorite solution. The mixed solution is nontoxic and harmless, is moderate in price, has aSO2 removal rate of 80 to 90 percent and a NO removal rate over 60 percent, and can be produced in batches on a large scale.

Description

Technical field: [0001] The invention belongs to the technical field of environmental protection, and is for simultaneous removal of sulfur dioxide and nitrogen oxides from boiler flue gas, in particular to a mixed solution for simultaneous wet desulfurization and denitrification and an application method. Background technique: [0002] SO in flue gas 2 NOx and NOx are the main air pollutants. Treating them separately not only occupies a large area, but also requires high investment and operating costs. In order to meet the current and future needs of air pollution control, it is a development trend in this field to develop new technologies and equipment for simultaneous desulfurization and denitrification. [0003] At present, the integration process of flue gas desulfurization and denitrification has attracted widespread attention from all over the world. The integrated process combines desulfurization and denitrification technologies in the same process flow, which can ...

Claims

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Application Information

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IPC IPC(8): B01D53/60B01D53/79
CPCY02A50/20
Inventor 沈伯雄万古盘
Owner NANKAI UNIV
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