System and method for synergistically treating desulfurization waste water and enhancing agglomeration and removal of fine particles

A technology for fine particles and desulfurization wastewater, applied in chemical instruments and methods, solid separation, electrostatic effect separation, etc., can solve the problems of poor atomization effect of droplets, poor agglomeration effect of fine particles, and low effective collision efficiency of particles, etc., to achieve Promote agglomeration and removal, achieve secondary utilization, and fully atomize and disperse the effect

Active Publication Date: 2019-05-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chemical agglomeration technology has problems such as poor atomization effect of droplets and uneven distribution of atomized droplets in the flue gas due to the viscous polymer organic matter in the solution, which affects the aggl...

Method used

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  • System and method for synergistically treating desulfurization waste water and enhancing agglomeration and removal of fine particles
  • System and method for synergistically treating desulfurization waste water and enhancing agglomeration and removal of fine particles
  • System and method for synergistically treating desulfurization waste water and enhancing agglomeration and removal of fine particles

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Experimental program
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Effect test

Embodiment 1

[0033]A system for synergistically treating desulfurization wastewater and strengthening the agglomeration and removal of fine particles, the system includes a coagulation and growth system 1, and the coagulation and growth system 1 includes a shell 2 with a square cross section, a particle charging device, an agglomeration Liquid atomization charging device and turbulent flow agglomeration device; the left side of the housing is the smoke inlet, and the right side is the smoke outlet, both of which are in the shape of a trumpet mouth, and the small mouth is facing outward; The inner cavity of the shell is divided into particle charging area, agglomeration liquid atomization charging area and turbulent agglomeration area from left to right;

[0034] The particle charging device adopts a line-plate structure arrangement, and the particle charging device includes a first negative voltage DC high-voltage power supply 3 and several plate electrodes 4, the plate electrodes 4 are mad...

Embodiment 2

[0048] The dusty flue gas is produced by the coal-fired boiler, and the flue gas velocity in the shell is 12m / s. After the boiler is running stably, a certain amount of fly ash is added to the flue gas to simulate the flue gas generated by the actual power plant combustion to ensure the concentration of fine particles required for the test. The smoke sampler is used to sample and test the total dust concentration in the flue gas. ELPI online test PM 2.5 Concentration and particle size distribution. After testing, the total dust concentration in the original flue gas is 10.5g / m 3 , PM 10 The total mass concentration is 235.5mg / m 3 , with a number concentration of 5.3´10 7 / cm 3 , before the system and method of the present invention are not used, the flue gas directly enters the electrostatic precipitator and is discharged, and the total dust concentration in the flue gas is 0.51g / m 3 , PM 10 The mass concentration is 20.4mg / m 3 , with a number concentration of 5.1´10 ...

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Abstract

The present invention discloses a system and a method for synergistically treating desulfurization waste water and enhancing agglomeration and removal of fine particles. The system comprises a condensational growth system. The fine particles in flue gas are negatively charged under the action of a negative high voltage direct current electric field; agglomeration liquid prepared by the desulfurization waste water and a chemical agglomeration agent is sprayed through a two-fluid atomizing nozzle and charging and electrostatic atomization effects are generated under the action of a high voltageannular electrode so that atomization and dispersion of droplets are more fully and droplets are positively charged. Then eddy current at different scales is generated by a cross-shaped insulating turbolator in a turbulent agglomeration area so that the fine particles with different charges and the agglomeration liquid droplets collide and agglomerate in a turbulent flow field and an attractive action is generated by a coulomb force between the two; meanwhile, adsorption and adhesion are generated among the fine particles by the chemical agglomeration agent in the droplets, thereby the condensational growth among the fine particles is enhanced; finally the fine particles are removed by an electrostatic dust collector, and then evaporation treatment of the desulfurization waste water and enhanced removal of the fine particles are realized.

Description

technical field [0001] The invention relates to a system and method for co-processing desulfurization wastewater and strengthening the agglomeration and removal of fine particles, belonging to the technical field of air pollutant treatment. Background technique [0002] Coal-fired power plants are an important part of my country's power system, which emit a large amount of gas, liquid and solid pollutants during their operation. With the implementation of water pollution control actions in coal-fired power plants and the transformation of ultra-low emission of air pollutants, the zero discharge of desulfurization wastewater and the efficient capture of fine particles have attracted widespread attention. [0003] Desulfurization wastewater is mainly the discharge water from the absorption tower in the process of flue gas wet desulfurization (limestone / gypsum method) in coal-fired power plants. It has the characteristics of high salt, high hardness, high concentration of sus...

Claims

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Application Information

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IPC IPC(8): B03C3/013B03C3/014
Inventor 杨林军孙宗康周磊申奥吴新
Owner SOUTHEAST UNIV
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