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Flue gas wet desulphurization, dedusting integrated device and process

A wet desulfurization and flue gas technology, applied in the field of dust removal synergistic process and wet desulfurization, can solve the problems of secondary pollution of flushing fluid, high operation and maintenance costs, and single implementation content, so as to prevent secondary atomization and improve dust removal. The effect of defogging efficiency and improving replenishment efficiency

Active Publication Date: 2017-04-26
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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  • Flue gas wet desulphurization, dedusting integrated device and process
  • Flue gas wet desulphurization, dedusting integrated device and process
  • Flue gas wet desulphurization, dedusting integrated device and process

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. 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 is ...

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 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 is 35°, t...

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Abstract

The invention discloses a flue gas wet desulphurization, dedusting integrated device and process. Original flue gas sequentially enters into an absorbing tower, then passes a pallet layer, a spraying layer, an ultra-fine atomizing and cooling zone and a swirling flow demisting layer to be discharged from an outlet of the absorbing tower. The pallet layer rectifies the flue gas entering into the absorbing tower, then the flue gas ascends in a uniform flow speed on the section of the absorbing tower. SO2 in the flue gas is absorbed and removed. The desulphurized saturated flue gas carrying tiny slurry droplets and dust undergoes atomizing and spraying to be cooled down. The tiny slurry droplets and dust in the flue gas is cooled down in temperature, then condenses and precipitates to a tower slurry pond. The over-saturated flue gas carrying tiny fog droplets continues to ascend to pass through the swirling, liquid knockout, enrichment and removal. The clean flue gas is emitted. The flue gas wet desulphurization, dedusting integrated device and process not only can enhance the removal efficiency of SO2, but also can obviously enhance the dedusting efficiency of the absorbing tower, and achieve the super low emission of the 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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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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