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Multi-scale spraying and atomizing haze removal method

A multi-scale, spray system technology, applied in the direction of chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of unfavorable air quality, limited removal efficiency, large water consumption, etc., and achieve low energy consumption and applicable particle size range Wide and efficient removal effect

Inactive Publication Date: 2018-11-02
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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  • Claims
  • Application Information

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Problems solved by technology

The D50 value of the existing spray atomization haze removal technology and operation method of spraying water mist is above 20 microns, the mechanism of action is single, and the water consumption is large. Usually, only large-sized pollutant particles can be removed and the removal efficiency is high. Limited, under conditions that are very favorable for removal, such as moderate and severe haze, the removal efficiency of PM10 is difficult to exceed 30%, and the removal efficiency of PM2.5 is lower or even has no effect. Improper water quality treatment or improper operation methods will cause Increased smog is not conducive to the improvement of air quality

Method used

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Embodiment 1

[0018] a. According to the type, scale, concentration and environmental parameters of local pollutant particles released by Chengdu City, Sichuan Province on December 25, 2017, the median particle size of the target spray particle size spectrum is determined to be between 15 and 20 microns;

[0019] b. If figure 1 As shown, the spray system is composed of four nozzles, including single-phase high-pressure nozzles, gas-liquid two-phase nozzles, bubble atomization nozzles and ultrasonic atomization nozzles. The pressure and flow parameters of each nozzle in the spray system are coordinated and distributed. The joint operation of multiple sets and multi-parameter nozzles and coordinated control of pressure and flow parameters, the spray system generates multi-scale droplets with a median particle size D50 of 15-20 microns that meet the target particle size spectrum, and sprays them into the atmosphere;

[0020] c. After Brownian collision, coalescence growth, inertial trapping, d...

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Abstract

The invention discloses a multi-scale spraying and atomizing haze removal method which includes the steps: a determining target spraying particle-size spectra according to types, scales and concentrations and environmental parameters of local pollutant particles published by related national departments; b coordinating and distributing pressure and flow parameters of sprayers of in a spraying system, generating multi-scale liquid drops meeting the target spraying particle-size spectra by the spraying system or by ultrasonic atomization, and spraying the multi-scale liquid drops into the air; cperforming Brown collision, coalescence growth, inertial capture, direct interception, supersaturated condensation of water vapor and the like on multi-scale liquid drops and the pollutant particles,enabling the multi-scale liquid drops to carry the particles, or settling the particles after coalescence growth, and removing the particles. The method has the advantages of wide application range,high haze removal efficiency and the like. The method can be flexibly adjusted according to types and concentrations of the pollutants, so that particle pollutants with different scales are efficiently removed.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a multi-scale spray atomization haze removal method. Background technique [0002] As one of the "three tough battles", the "Battle for Blue Sky" is closely related to the health of the people and the stable development of the country. The D50 value of the existing spray atomization haze removal technology and operation method of spraying water mist is above 20 microns, the mechanism of action is single, and the water consumption is large. Usually, only large-sized pollutant particles can be removed and the removal efficiency is high. Limited, under conditions that are very favorable for removal, such as moderate and severe haze, the removal efficiency of PM10 is difficult to exceed 30%, and the removal efficiency of PM2.5 is lower or even has no effect. Improper water quality treatment or improper operation methods will cause Increased smog is not c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D47/06
CPCB01D47/06
Inventor 李树民李雨芮李霞
Owner CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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