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Integrated flue gas desulfurizing and denitrating purification system and purification technology for same

A flue gas purification system, desulfurization and denitrification technology, applied in air quality improvement, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of energy consumption reduction, inability to remove nitrogen pollutants at the same time, and achieve economic cost reduction , remarkable energy saving effect, technological process and environmental protection effect

Active Publication Date: 2012-06-27
BEIJING ZHONGNENG NUOTAI ENERGY SAVING & ENVIRONMENTAL PROTECTION CO LTD
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  • Description
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AI Technical Summary

Problems solved by technology

The utility model will (NH 4 ) 2 SO 3 Compared with the traditional ammonia method and the current flue gas desulfurization equipment, the deep oxidation of the solution has lower energy consumption and better purification effect, but it is only suitable for the removal of sulfur pollutants in the flue gas, and cannot remove both Function of Nitrogen Pollutants

Method used

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  • Integrated flue gas desulfurizing and denitrating purification system and purification technology for same
  • Integrated flue gas desulfurizing and denitrating purification system and purification technology for same

Examples

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Embodiment 1

[0056] Such as figure 1 As shown, the present invention is an integrated flue gas purification system for desulfurization and denitrification, including an interconnected flue gas input system, a flue gas absorption and purification system, a clean flue gas discharge system, and a flue gas oxidation system connected to the flue gas input system. system, a concentration system connected to the flue gas input system, a slurry treatment system connected to the concentration system, a slurry oxidation system connected to the flue gas absorption and purification system, and an absorbent delivery system; wherein:

[0057] The flue gas input system includes an input flue 1 and a flue gas input fan 2 connected to each other.

[0058] The flue gas oxidation system is an ozone oxidation system, including an air input pipeline 31 , an air separation device 30 and an ozone generator 29 connected to each other, and the ozone generator 29 is connected to the input flue 1 .

[0059] The con...

Embodiment 2

[0084] Such as figure 1 As shown, the setting and distribution of a flue gas purification system integrated with desulfurization and denitrification are the same as in Embodiment 1.

[0085] The desulfurization and denitrification integrated flue gas purification process carried out by applying the desulfurization and denitrification integrated flue gas purification system of the present invention is the same as that in Example 1, except for the following steps:

[0086] The flue gas entering the concentration tower 3 in step (2) is cooled to 70°C and enters the flue gas purification and absorption system through the transition flue 4;

[0087] In the above embodiment, the absorbent is a potassium hydroxide solution with a mass percentage of 25%; the molar ratio of the ozone to the NO in the flue gas is 1:1; the density of the absorbed saturated slurry reaches 1.3g / cm 3 When entering the saturated slurry discharge pump 17; the density of the concentrated slurry reaches 1.7g...

Embodiment 3

[0090] Such as figure 1 As shown, the setting and distribution of a flue gas purification system integrated with desulfurization and denitrification are the same as in Embodiment 1.

[0091] The desulfurization and denitrification integrated flue gas purification process carried out by applying the desulfurization and denitrification integrated flue gas purification system of the present invention is the same as that in Example 1, except for the following steps:

[0092] The flue gas entering the concentration tower 3 in step (2) is cooled to 60°C and enters the flue gas purification and absorption system through the transition flue 4;

[0093] In the above embodiment, the absorbent is a potassium hydroxide solution with a mass percentage of 8%; the molar ratio of the ozone to the NO in the flue gas is 1:2; the density of the absorbed saturated slurry reaches 1.2g / cm 3 When entering the saturated slurry discharge pump 17; the density of the concentrated slurry reaches 1.5g / ...

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Abstract

The invention relates to an integrated flue gas desulfurizing and denitrating purification system and a purification technology for the same, in particular to an integrated flue gas desulfurizing and denitrating purification system and purification technological processes for the same for coal firing industry. The integrated flue gas desulfurizing and denitrating purification system comprises a flue gas input system, a flue gas absorption and purification system, a purified flue gas exhaust system, a flue gas oxidizing system, a concentrating system, a slurry treatment system, a slurry oxidizing system and an absorbent delivery system, wherein the flue gas input system, the flue gas absorption and purification system and the purified flue gas exhaust system are mutually connected, the flue gas oxidizing system and the concentrating system are connected with the flue gas input system, the slurry treatment system is connected with the concentrating system, and the slurry oxidizing system and the absorbent delivery system are connected with the flue gas absorption and purification system. The purification technology is a comprehensive treatment technology including the processes of oxidizing flue gas, purifying and absorbing the oxidized flue gas and purifying after-products. The system is effectively integrated, simple, efficient and environment-friendly integrated flue gas desulfurization and denitration are realized, economic cost is greatly reduced correspondingly, and the purification technology is suitable for popularization and application in the field of purification and treatment of tail gas with sulfur and nitrogen oxides serving as main pollutants in coal firing boilers and other industries.

Description

technical field [0001] The invention relates to a desulfurization and denitration integrated flue gas purification system and a purification process thereof, in particular to a flue gas desulfurization and denitrification integrated purification system and a purification process flow of the coal-fired industry. Background technique [0002] At present, the pollutants in coal-fired boilers and other industrial exhaust gases are sulfur and nitrogen oxides (SO 2 , NOx), and there are many treatment technologies for these flue gas pollutants, such as: treatment of sulfur dioxide (SO 2 ), the limestone-gypsum method, the ammonia method, the double alkali method, the selective catalytic reduction (SCR) method, the selective non-catalytic reduction (SNCR) method, and the low-nitrogen combustion method for controlling nitrogen oxides (NOx). The complete removal of sulfur and nitrogen pollutants in the process needs to be carried out separately in different devices and processes. At...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/96B01D53/60
CPCY02A50/20
Inventor 艾淑艳
Owner BEIJING ZHONGNENG NUOTAI ENERGY SAVING & ENVIRONMENTAL PROTECTION CO LTD
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