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Precharged particulate matter strengthened-removal system based on humidification and flow equalization

A pre-charging, particulate matter technology, applied in power supply technology, electrostatic separation, steam flow control and other directions, can solve the problems of difficult charging of ultra-fine particles, uneven airflow distribution, low removal efficiency, etc., to achieve good working conditions and The effect of particle characteristics adaptability, optimization of flue gas flow field distribution, and enhancement of charging effect

Active Publication Date: 2017-09-19
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Aiming at the problems of uneven airflow distribution, difficulty in charging ultra-fine particles, low charging capacity, and low removal efficiency in the existing flue gas pollutant emission reduction process, the present invention proposes a humidified and even-flow pre-charged particle enhanced removal method. system

Method used

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  • Precharged particulate matter strengthened-removal system based on humidification and flow equalization
  • Precharged particulate matter strengthened-removal system based on humidification and flow equalization
  • Precharged particulate matter strengthened-removal system based on humidification and flow equalization

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Embodiment 1

[0039] refer to Figure 1~4 , a humidified flow equalization pre-charged particulate matter enhanced removal system, said system sequentially includes a droplet injection device 1, a current equalization device 2 combining flow blocking and diversion, and a charge enhancement discharge device 3 along the flue gas direction , the distance between the droplet spraying device 1 and the flow equalizing device 2 combining flow blocking and guiding is 1000 mm.

[0040] The droplet spraying device includes a nozzle 5 and a bracket 6, the bracket is arranged perpendicular to the direction of the flue gas, and parallel pipes 7 are installed on the bracket, and the nozzle 5 is arranged on the pipe 7; the pipe 7 is perpendicular to the smoke The gas direction is arranged, the distance between the pipes is not greater than the effective spraying distance of the nozzles 5, the spraying direction of the nozzles 5 is perpendicular to the smoke direction, the nozzles on a single pipe are even...

Embodiment 2

[0047] refer to Figure 2-6 , a humidified and even-flow pre-charged particulate matter enhanced removal system. According to the sequence of the flue gas flow, an ultra-fine droplet spraying device 1, a current-balancing device 2 combining flow blocking and diversion, and a charge-enhancing discharge device are respectively arranged. 3. The air flow first passes through the ultra-fine droplet injection device 1 and then through the flow equalization device 2 combining flow blocking and diversion. The distance between the ultrafine droplet injection device 1 and the flow equalization device 2 combining flow resistance and flow diversion is 500 mm.

[0048] The droplet spraying device includes a nozzle 5 and a bracket 6, the bracket is arranged perpendicular to the direction of the flue gas, and parallel pipes 7 are installed on the bracket, and the nozzle 5 is arranged on the pipe 7; the pipe 7 is perpendicular to the smoke The gas direction is arranged, the distance between ...

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Abstract

The invention relates to a precharged particulate matter strengthened-removal system based on humidification and flow equalization. The precharged particulate matter strengthened-removal system sequentially comprises a liquid drop spraying device, a flow blocking and flow guiding combined flow equalization device, a charging strengthening and discharging device in the flue gas direction. The liquid drop spraying device comprises spray nozzles and a support. The support is arranged in the direction perpendicular to the flue gas. Parallel pipelines are installed on the support. The spray nozzles are arranged on the pipelines. The flow blocking and flow guiding combined flow equalization device comprises baffles with open holes. The porosity of each baffle is 40%-50%, and the diameter of each open hole is 30-60 mm. The charging strengthening and discharging device comprises polar lines. The polar lines are arranged behind the baffles, installed on a hanging frame and connected with a power supply. Flue gas humidification, uniform air flow distribution and a high-voltage electrostatic field are combined, distribution of a flue gas flow filed is optimized while charging of particulate matter is strengthened on multiple aspects, the efficiency loss caused by the nonuniform flow field to a follow-up emission reduction system is reduced, and efficient removing of the superfine particulate matter is guaranteed on multiple aspects such as the flow field, humidifying and discharging strengthening.

Description

technical field [0001] The invention belongs to the technical field of pollution reduction and emission reduction in energy and environmental engineering, and in particular relates to a system for enhanced removal of humidified and even-flow pre-charged particles. Background technique [0002] Formation of haze weather and primary fine particulate matter PM 2.5 The emission of pollutants is closely related to the formation of secondary fine particles in the ambient air. The coal combustion process is fine particulate matter (PM 2.5 ) and the precursors of secondary particulate matter are one of the most important sources of air pollutants. 2.5 Secondary PM formed by its precursor 2.5 Strict control is carried out. "Emission Standards of Air Pollutants for Thermal Power Plants" (GB13223-2011), requires that the dust emission concentration of thermal power plants should be lower than 30mg / m 3 , less than 20mg / m in key areas 3 . Some areas / power companies propose to reac...

Claims

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Application Information

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IPC IPC(8): B03C3/16B03C3/36B03C3/66B03C3/014
CPCB03C3/014B03C3/16B03C3/36B03C3/361B03C3/66
Inventor 高翔郑成航郭一杉张涌新竺新波常倩云王毅吴卫红翁卫国岑可法
Owner ZHEJIANG UNIV
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