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Wet flue gas desulfurization and denitrification system and process

A wet flue gas desulfurization and flue gas technology, which is applied in the field of wet flue gas desulfurization and denitrification systems

Pending Publication Date: 2021-05-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing desulfurization and denitrification technology is difficult to meet the increasing flue gas emissions. With the rapid economic development, environmental pollution is also spreading rapidly. Therefore, in order to improve the efficiency of desulfurization and denitrification, a new type of combined desulfurization is needed. Denitrification devices are used to strengthen the deficiencies of existing technologies, and at the same time improve the combined desulfurization and denitrification process to provide a good impetus and guidance for the development of comprehensive flue gas treatment technology in the future

Method used

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  • Wet flue gas desulfurization and denitrification system and process

Examples

Experimental program
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Effect test

Embodiment 1

[0079] The flue gas of a steel company, the flue gas volume is 50×10 4 m 3 / h, flue gas inlet SO 2 The concentration is 5500mg / m 3 , NO x 265mg / m 3 , the flue gas temperature is 110°C, and the dust content is 15mg / m 3 , the flue gas humidity is 10.1%, the flue gas temperature after the flue gas is washed with washing water is 48°C, the temperature of the desulfurizer entering the desulfurization tower is 45°C, and the circulation volume of the desulfurizer is 272m 3 / h of flue gas desulfurizer reverse contact reaction, flue gas temperature after reaction with flue gas desulfurizer is 52°C, flue gas rotation accelerator opening is 50%, flue gas velocity is 8m / s, flue gas humidity is 12.2% , the content of flue gas desulfurization agent in flue gas humidity is 0.001%, the temperature of denitrification agent entering the denitrification tower is 51°C, and the circulation volume of denitrification agent is 750m 3 / h flue gas desulfurizer reverse contact reaction, the temper...

Embodiment 2

[0081] The flue gas of a steel company, the flue gas volume is 50×10 4 m 3 / h, flue gas inlet SO 2 The concentration is 5500mg / m 3 , NOx is 265mg / m 3 , the flue gas temperature is 110°C, and the dust content is 15mg / m 3 , the flue gas humidity is 10.1%, the flue gas temperature after the flue gas is washed with washing water is 50°C, the temperature of the desulfurizer entering the desulfurization tower is 45°C, and the circulation volume of the desulfurizer is 272m 3 / h of flue gas desulfurizer reverse contact reaction, after reacting with flue gas desulfurizer, the flue gas temperature is 52°C, the opening of the flue gas rotating acceleration device is 85%, the flue gas velocity is 4.7m / s, and the flue gas humidity is 12.2 %, the content of flue gas desulfurization agent in flue gas humidity is 0.019%, the temperature of denitrification agent entering the denitrification tower is 51°C, and the circulation volume of denitrification agent is 750m 3 / h of the flue gas den...

Embodiment 3

[0083] The flue gas of a steel company, the flue gas volume is 50×10 4 m 3 / h, flue gas inlet SO 2 The concentration is 5500mg / m 3 , NOx is 265mg / m 3 , the flue gas temperature is 110°C, and the dust content is 15mg / m 3 , the flue gas humidity is 10.1%, the flue gas temperature after the flue gas is washed with washing water is 48°C, the temperature of the desulfurizer entering the desulfurization tower is 45°C, and the circulation volume of the desulfurizer is 272m 3 / h of flue gas desulfurizer reverse contact reaction, the temperature of flue gas after reacting with flue gas desulfurizer is 51℃, the opening degree of flue gas rotating acceleration device is 85%, the flue gas velocity is 4.6m / s, and the flue gas humidity is 11.8 %, the content of flue gas desulfurization agent in flue gas humidity is 0.019%, the temperature of denitrification agent entering the denitrification tower is 51°C, and the circulation volume of denitrification agent is 750m 3 / h of flue gas den...

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Abstract

The invention provides a wet flue gas desulfurization and denitrification system. A flue gas desulfurization unit comprises a flue gas washing section, a flue gas desulfurization section and a desulfurization liquid trapping section which are sequentially arranged from bottom to top. A flue gas denitration unit comprises a denitration section communicated with a desulfurization and demisting section, a denitration agent trapping section, a flue gas cooling section, a flue gas demisting section and a flue gas heating section which are sequentially arranged from bottom to top. Each of the desulfurization liquid trapping section and the denitration agent trapping section is independently provided with a silk screen filler layer, a liquid breaking disc, a gas rising cap, a flue gas rotation accelerating device, a high-pressure spraying device and a baffle plate in sequence from bottom to top. Gas rising holes are formed in the flue gas rotation accelerating devices, and the opening degrees of the gas rising holes are larger than or equal to 25% and smaller than 100%. By arranging the desulfurization liquid trapping section and the denitration agent trapping section, a desulfurization agent and a denitration agent entrained in flue gas can be effectively trapped and recycled, escape of the desulfurization liquid and the denitration agent and secondary pollution caused by escape of the desulfurization liquid and the denitration agent are reduced, and the emission concentrations of SO2 and NOx are low.

Description

technical field [0001] The invention belongs to the field of metallurgical waste gas treatment and resource utilization, and in particular relates to a wet flue gas desulfurization and denitrification system and process. Background technique [0002] The desulfurization and denitrification integration technology widely used at home and abroad today is mainly the combination of wet flue gas desulfurization and selective catalytic reduction or selective non-catalytic reduction technology denitrification. [0003] Since the 1970s, developed countries have experienced flue gas SO 2 Based on the research on emission control technology, the research on the neutralization and simultaneous removal of industrial flue gas began. Most of the desulfurization and denitrification integrated technologies are in the research stage, and none of them have been applied in large-scale industries. The development technology is simple, the operation cost is low, and the desulfurization and deni...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50B01D53/56B01D45/08
CPCB01D45/08B01D53/507B01D53/56B01D53/78B01D2251/60B01D2251/80B01D2258/0283
Inventor 邱正秋刘鹏举王建山张小龙
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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