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Composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas

An electrostatic precipitator and flue gas technology, applied in the field of flue gas electrostatic precipitator, can solve problems such as single process, inability to achieve grading treatment, and harm to human health.

Active Publication Date: 2021-09-07
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the presence of a large amount of heavy metal pollutants such as arsenic, selenium, and lead in the flue gas, the existing WESP equipment cannot effectively remove arsenic, selenium, and lead from the flue gas, and the process is single, and graded treatment cannot be achieved. The removal efficiency is not high, and these heavy metals may be harmful to human health along with the biological chain when they are discharged along with the flue gas, resulting in major safety accidents

Method used

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  • Composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas
  • Composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas
  • Composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas

Examples

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Embodiment 1

[0030] refer to figure 1 , a compound electrostatic precipitator device for removing arsenic, selenium, and lead in flue gas, comprising: a device main body 100, including a casing 101, an intake fan 102 arranged on the casing 101, and an air inlet fan 102 arranged on the casing 101 The discharge port 103 at the lower end; the injection assembly 200, including the electrode column 201 arranged in the casing 101, the atomizing nozzle 202 arranged in the casing 101 and the ultrasonic oscillator 203 arranged in the casing 101; and, the filter assembly 500, the filter assembly 500 includes an activated carbon filter screen, and the housing 101 is provided with two.

[0031] Specifically, the main structure of the present invention includes a device main body 100. In this embodiment, the device main body 100 includes a casing 101, two casings 101 are provided, and an air intake fan 102 is arranged in the casing 101. The air intake fan 102 It is arranged at one end of the housing 1...

Embodiment 2

[0035] refer to Figure 1-4 , This embodiment is different from the first embodiment in that: there are two casings 101, and the two casings 101 include an outer casing 101a101, a storage chamber 101b opened in the outer casing 101a101, and a storage chamber 101b on the upper wall The upper floor 101c at the place and the lower bottom plate 101d arranged at the lower wall of the storage chamber 101b, the electrode column 201 is arranged between the upper floor 101c and the lower bottom plate 101d, and the lower bottom plate 101d is provided with a communication hole 104 communicating with the discharge port 103 , wherein, a connector 400 is provided between the two housings 101, and the ultrasonic oscillator 203 includes a fixed column 203a arranged in the other housing 101, a number of divergent plates 203b arranged on the upper end of the fixed column 203a, and a plurality of divergent plates arranged on the diffuser plate The ultrasonic transmitter 203c in 203b, the lower e...

Embodiment 3

[0044] refer to Figure 5 , This embodiment is different from the above embodiments in that: the connector 400 includes a connecting pipe 401 connected between the two housings 101, a rotating rod 402 rotatably connected in the connecting pipe 401, and a rotating rod 402 arranged at the upper end and the lower end The rotating cylinder 403, the rotating cylinder 403 includes a first connecting plate 403a connected to the rotating rod 402, a second connecting plate 403b arranged at the end away from the first connecting plate 403a, and a second connecting plate 403b arranged on the first connecting plate 403a and the second connecting plate 403b Between the driving rod 403c, a driving gap is formed between the driving rods 403c, a circular plate 404 is rotatably connected in the connecting pipe 401, and a plurality of protrusions 405 matching with the driving gap are arranged on the circular plate 404, and a micrometer is arranged in the rotating cylinder 403. Level filter elem...

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Abstract

The invention discloses a composite electrostatic dust collection device for removing arsenic, selenium and lead in flue gas, comprising: a device body which comprises a shell, an air inlet fan arranged on the shell and a discharge port arranged at the lower end of the shell; a spraying assembly which comprises an electrode column arranged in the shell, an atomization nozzle arranged in the shell and an ultrasonic oscillator arranged in the shell; and a filter assembly which comprises an activated carbon filter screen. Flue gas firstly passes through a first column of cathode tubes to electrify particulate matter in the flue gas. When the flue gas passes through a second column of anode tubes, the flue gas is adsorbed on the anode tubes. Then, the flue gas continues to flow, passes through a third column of cathode tubes and is electrified, and then the flue gas is enriched on a fourth column of anode tubes. One ultrasonic oscillator is arranged in the middle of an electrostatic dust collection area and used for vibrating dust enriched on the anode tubes to fall into a dust hopper below, and then the atomization nozzle is arranged in the other shell.

Description

technical field [0001] The invention relates to the technical field of flue gas electrostatic dust removal, in particular to a composite electrostatic dust removal device for removing arsenic, selenium and lead in flue gas. Background technique [0002] At present, China is the world's largest coal producer and also the largest coal consumer. At present, coal accounts for about 56% of my country's energy structure. Among them, thermal power generation is China's largest coal consumer, and a large amount of SOx will be produced during the coal combustion process. At the same time, some heavy metal pollutants will be discharged into the atmosphere with the flue gas, including heavy metal pollutants such as arsenic, selenium and lead. The Chinese standard (GB13223-2011) limits the emission concentration of Hg to 0.03mg / m3, the U.S.’s pollutant emission indicators for existing coal-fired units are arsenic (As) 0.473mg / GJ, 9.072mg / MWh, selenium (Se) 2.15mg / GJ, 27.216mg / MWh, lead (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03C3/017B03C3/76B01D53/64B01D53/78
CPCB03C3/017B03C3/76B01D53/64B01D53/78B01D2251/108B01D2251/304
Inventor 吴江张琪林邬宇吴彪何平王星博洪剑东沈鹏张博文李帅孙宁超
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER