Study on flow field characteristics of dust airflow in vibrating screen and optimization of dust removal system
10.3760/cma.j.cn121094-20201019-00588
- VernacularTitle:振动筛分机除尘系统优化及现场应用
- Author:
Shanshan WU
1
;
Jinning YU
;
Jingyun LI
;
Chunhong HE
;
Changyun ZHANG
Author Information
1. 266071 青岛，中国石油化工股份有限公司青岛安全工程研究院
- Keywords:
Dust;
Flow field characteristics;
Exhaust hood;
Blow suction ventilation;
Capture efficiency
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2021;39(9):696-699
- CountryChina
- Language:Chinese
-
Abstract:
In order to solve the problem of dust hazard of vibrating screen machine and difficult treatment in catalyst production process, computational fluid dynamics software Fluent was used to carry out numerical simulation calculation of the local exhaust dust removal system for the main dust dispersing points of the vibrating screen machine, including fine/coarse particles outlet and product outlet blowing and cleaning the dust points. The optimal design scheme and key technical parameters of local ventilation and dust removal system of vibrating screen machine were proposed. The results showed that the dust diffusion could be prevented by setting up an upper suction hood without air blowing, but the exhaust air volume needed to be calculated accurately. On the premise of purge, it is necessary to control the air volume to form a wind speed band of 8 m/s with a height of 15 cm at the feed port, so as to effectively remove the dust on the surface of solid particles of catalyst products and ensure that the catalyst products will not be blown away when falling into the feed barrel. The simulated design was applied to the vibrating sieve powder machine of a catalyst company, and the maximum dust concentration in the workplace was reduced from 45.80 mg/m 3 to 5.46mg/m 3, which effectively improved the working environment in the workplace.
