Multifield promotion-based coagulation and aggregation strengthening device and method for particulate matters

A technology for strengthening devices and particulate matter, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve problems such as unsatisfactory effects, improve the probability of particle collision and agglomeration, increase the average particle size, and reduce the emission concentration. Effect

Inactive Publication Date: 2017-09-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, for the particle coagulation and agglomeration technology, there are electrocoagulation produced by the attractive collision between particles with different charges, acoustic coagulation produced by the vibration and collision of particles of different sizes in the sound wave, and the use of chemical agglomerating agents sprayed on the flue gas methods such as chemical agglomeration that absorb particles and increase interparticle cohesion, however, these methods are not effective alone

Method used

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  • Multifield promotion-based coagulation and aggregation strengthening device and method for particulate matters
  • Multifield promotion-based coagulation and aggregation strengthening device and method for particulate matters
  • Multifield promotion-based coagulation and aggregation strengthening device and method for particulate matters

Examples

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Effect test

Embodiment 1

[0032] refer to figure 1 , figure 2, a particle coagulation and agglomeration strengthening device based on multi-field promotion, the device includes a coalescer 1, along the direction from the coalescer inlet 8 to the coalescer outlet 6, and the heat exchange cooling condenser 13 is arranged in sequence in the coalescer , a spray humidifier, an orifice electrocoagulation system assisted by ion wind, and a coagulation mixer 5, and the outlet 6 of the coagulation unit is connected with the inlet of the electrostatic precipitator 7. The orifice electrocoagulation system assisted by the ion wind includes an anode 3, an orifice plate 4 and a cathode 9, and the anode 3, the orifice plate 4 and the cathode 9 are all arranged parallel to the flue gas flow direction, and the anode 3 and the cathode 9 are respectively arranged between two adjacent orifice-type pole plates, and along the direction perpendicular to the flow direction of the flue gas, the anode 3, the orifice-type pole...

Embodiment 2

[0039] refer to figure 1 , figure 2 , a method for strengthening the coagulation and agglomeration of particulate matter based on multi-field promotion, using the device of embodiment 1, comprising the following steps:

[0040] (1) The flue gas enters the condenser 1 from the inlet 8 of the condenser, and first passes through the heat exchange cooling condenser 13 to cool down and condense, and the moisture and SO in the flue gas 3 Condensation and aggregation on the surface of the particles increases the size of the particles, increases the dielectric constant, and enhances the charging capacity;

[0041] The heat exchange cooling condenser 13 reduces the temperature of the flue gas to between 100°C and 80°C, and the heat exchange cooling condenser is used to recover the heat in the flue gas, so that the moisture and SO in the flue gas 3 and other components condense on the surface of the particles, improving the polarization ability and dielectric constant of the particle...

Embodiment 3

[0048] refer to image 3 , Set the spray humidifier 5 behind the orifice electrocoagulation system assisted by ion wind, and refer to Example 1 for others.

[0049] This device is tested in the laboratory (test conditions such as embodiment 1), test result shows, flue gas passes through this device, PM 1.0 The number concentration of the particles is reduced by 42%, the median particle size of the particles is increased by 35%, and the emission concentration is reduced to 8mg / m when combined with dust removal equipment 3 the following.

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Abstract

The invention relates to a multifield promotion-based coagulation and aggregation strengthening device and method for particulate matters. According to the coagulation and aggregation strengthening device, a heat-exchange cooling condenser, an ion wind-assisted orifice plate type electric coagulation system and a coagulation mixer are arranged in sequence in a coagulator, the ion wind-assisted orifice plate type electric coagulation system comprises an anode, orifice plate type polar plates and an cathode, the anode and the cathode are respectively arranged between two adjacent orifice plate type polar plates, a spray humidifier is also arranged in front of or behind the orifice plate type electric coagulation system, and the spray humidifier comprises a plurality of nozzles communicated with a liquid drop generating device. The coagulation and aggregation strengthening device combines phase change condensation with spray humidification and growth, simultaneously improves the particle collision and coagulation probability by using the ion wind convection field effect in an electric dust collector, and integrates multifield effects of electric field force, liquid bridge force, van der waals force, viscous force and the like in the same equipment for strengthening the coagulation and aggregation effects of the particles, so the average particle diameters of the particles are increased obviously, and the method is an efficient way for further increasing the removal effect of dedusting equipment and reducing the discharge concentration of particulate matters in flue gas.

Description

technical field [0001] The invention belongs to the field of industrial flue gas purification such as coal-fired power plants, and in particular relates to a device and method for strengthening the coagulation and agglomeration of particulate matter based on multi-field promotion. Background technique [0002] With the development of industry, my country is currently facing increasingly serious air pollution problems. Among them, the smog phenomenon caused by particulate matter emissions has attracted widespread attention, and its concentration is an important air pollution indicator. Coal-fired power plants and other industrial emission sources are fine particles (PM 2.5 ), one of the main sources of PM 2.5 Small in size and light in weight, it will continue to diffuse with atmospheric movement and stay for a long time, causing continuous impact on human living environment and physical health. 2.5 ) is removed without delay. [0003] Electrostatic precipitator is one of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D51/02B01D51/04
CPCB01D51/02B01D51/04
Inventor 高翔郑成航常倩云张涌新竺新波翁卫国王毅岑可法
Owner ZHEJIANG UNIV
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