An integrated device and process for flue gas wet desulfurization and dust removal

A wet desulfurization and flue gas technology, applied in the direction of gas treatment, combined devices, separation methods, etc., can solve the problems of high operation and maintenance costs, secondary pollution of washing liquid, and single implementation content, so as to improve the efficiency of dust removal and mist removal, The effect of preventing secondary atomization and improving the efficiency of complementary collection

Active Publication Date: 2019-12-10
ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Wet electrostatic precipitators are added at the end of conventional flue gas treatment to achieve ultra-low dust emission control. The implementation of this technology is single, but there are high initial investment costs, high operation and maintenance costs, and long-term operation is likely to cause equipment corrosion and secondary pollution of washing liquid and other shortcomings

Method used

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  • An integrated device and process for flue gas wet desulfurization and dust removal
  • An integrated device and process for flue gas wet desulfurization and dust removal
  • An integrated device and process for flue gas wet desulfurization and dust removal

Examples

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Embodiment 1

[0071] A sintering plant, 2 sets 280m 2 The new desulfurization project of sintering flue gas adopts this process, and the SO in the inlet flue gas 2 The concentration is 1785mg / m 3 , the dust concentration in the inlet flue gas is 62mg / m 3 ;3-layer spraying, circulating slurry liquid-gas ratio 9.5L / Nm 3 ; The height of the ultra-fine atomization cooling zone is 3.5m, the average atomization particle size of the ultra-fine atomization nozzle is 54μm, and the liquid-gas ratio is 0.1L / Nm 3 ; The number of layers of the swirl module is 3 layers, the distance between two adjacent layers of swirl modules is 2.5 times the diameter of the cross-section of the hollow guide tube, the diameter of the drain hole on the upper wall of the module is 6mm, and the diameter of the central blind plate is the horizontal diameter of the hollow tube. 0.5 times the diameter of the section, the height of the upper cylinder of the conical device is 1cm, the cone angle of the lower inverted cone is...

Embodiment 2

[0073] In a thermal power plant, the flue gas desulfurization renovation project of two 75WM units adopts this process, and the SO in the inlet flue gas 2 The concentration is 1839mg / m 3 , the dust concentration in the inlet flue gas is 53mg / m 3 ;3-layer spraying, circulating slurry liquid-gas ratio 14.3L / Nm 3 ; The height of the ultra-fine atomization cooling zone is 3.0m, the average atomization diameter of the nozzle is 62μm, and the atomization liquid-gas ratio is 0.1L / Nm 3 ; The number of layers of the swirl module is 3 layers, the distance between two adjacent layers of swirl modules is 2.0 times the diameter of the cross-section of the hollow guide tube, and the diameter of the drain hole on the upper wall of the module is 6mm; the diameter of the central blind plate is the horizontal diameter of the hollow tube. The cross-sectional diameter is 0.5 times, the horizontal angle of the swirl blade is 30°, the angle between the upper edge of the swirl blade and the radius...

Embodiment 3

[0075] A self-provided electroplating power plant, a 360t / h boiler flue gas desulfurization renovation project adopts this process, SO in the inlet flue gas 2 The concentration is 1583mg / m 3 , the dust concentration in the inlet flue gas is 45mg / m 3 ;3-layer spraying, circulating slurry liquid-gas ratio 13.5L / Nm 3; The height of the ultra-fine atomization cooling zone is 2.5m, the average atomization diameter of the nozzle is 62μm, and the atomization liquid-gas ratio is 0.15L / Nm 3 ; The number of layers of the swirl module is 3 layers, the distance between two adjacent layers of swirl modules is 2.0 times the diameter of the cross-section of the hollow guide tube, the diameter of the drain hole on the upper wall of the module is 5mm, and the diameter of the central blind plate is the horizontal diameter of the hollow tube. 0.5 times the diameter of the section, the horizontal angle of the swirl blade is 30°, the angle between the upper edge of the swirl blade and the radius...

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Abstract

The invention discloses a flue gas wet desulfurization and dust removal integrated device and process. After the original flue gas enters the absorption tower, it passes through the tray layer, the spray layer, the ultra-fine atomization cooling area, and the swirl demisting layer, and then flows from the The outlet of the absorption tower is discharged. After the tray layer rectifies the flue gas entering the absorption tower, the flue gas rises at a uniform flow rate on the section of the absorption tower after being rectified by the tray layer. 2 After being absorbed and removed, the saturated flue gas with fine slurry droplets and dust after desulfurization is cooled by atomization and spraying. The flue gas carries the fine mist droplets and continues to rise through the swirling flow, impact enrichment and removal, and the clean flue gas is discharged. The present invention can not only improve SO 2 Removal efficiency, but also can significantly improve the dust removal efficiency of the absorption tower; realize ultra-low emission of flue gas.

Description

technical field [0001] The invention relates to a wet desulfurization and dust removal synergistic process, which belongs to the field of resources and environmental protection. Background technique [0002] With the rapid development of thermal power generation in recent years, SO 2 Emissions are increasing year by year, causing acid rain to intensify. In addition, the tail gas emitted by chimneys contains a large amount of fine particle dust, which causes frequent occurrence of smog in many cities and seriously endangers human health. In response to the increasingly severe air pollution problem, relevant national and local departments have issued some strict air pollution prevention and control plans, requiring new or under construction thermal power units to meet the emission requirements of gas-fired units, and SO in the exhausted flue gas 2 ≤35mg / Nm 3 , Dust≤5mg / Nm 3 , NOx≤50mg / Nm 3 , to achieve ultra-low emissions. [0003] The ultra-low emission of pollutants in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/80B01D53/50B01D53/00B01D50/00
CPCB01D53/002B01D53/50B01D53/80B01D2258/0283B01D50/40
Inventor 王岳军李泽清吴忠标叶涛陈美秀莫建松
Owner ZHEJIANG TIANLAN ENVIRONMENTAL PROTECTION TECH
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