摘要
为了抑制选煤厂筛分破碎楼粉尘浓度随时间延长逐渐升高问题,并解决现有除尘系统低温环境适应性差等技术难题,提出了一种基于循环通风与多级联动优化的粉尘治理方案。采用气固两相流理论结合计算流体力学(CFD)数值模拟技术,建立了筛分破碎车间粉尘扩散数学模型,通过Fluent软件对不同通风方案的气流组织规律进行三维仿真,优化吸尘口布设位置及抽吸风量分配策略。提出“四级联动优化体系”:①密封强化,对刮板机盖板跑冒滴漏点进行全密封处理;②多点抽吸,新增洗气机实现冲击产尘点全覆盖抽吸;③循环净化,设计气流循环路径,将净化后气体送入上层车间形成稳定流场;④远程集控,集成PLC远程监控系统,实现与生产系统协同控制。同时,采用防静电滤料及管路保暖技术,解决爆炸风险与低温环境冷凝水问题。工程实践表明,优化后的循环通风系统使车间粉尘浓度在持续生产中稳定维持在2.49~2.84 mg/m^(3)(国标限值为4 mg/m^(3)),降尘效率达到95%。系统已连续运行超过13个月,创新性设计的循环通风除尘技术方案,解决了寒冷矿区冬季通风保暖与粉尘治理的矛盾,实现了筛分破碎楼粉尘浓度的长期稳定控制。其技术路径具有显著的创新性与工程适用性,为同类高粉尘、低温工业场景提供了可复制的解决方案。
In order to suppress the problem of gradually increasing dust concentration in the screening and crushing workshops of the coal preparation plant over time,and to solve technical problems such as poor adaptability to low temperature environments in existing dust removal systems,a dust control scheme based on circulating ventilation and multi-level linkage optimization was proposed.A math-ematical model for dust diffusion in a screening and crushing workshop was established using the gas-solid two-phase flow theory com-bined with computational fluid dynamics(CFD)numerical simulation technology.The airflow organization rules of different ventilation schemes were simulated in three dimensions using Fluent software to optimize the placement of suction ports and the distribution strategy of suction air volume.A"four level linkage optimization system"was proposed:strengthen sealing,fully seal the leakage points of the scraper cover plate;multi point suction,add a washing machine to achieve full coverage suction of impact dust production points;circu-late purification,design an airflow circulation path to send purified gas into the upper workshop to form a stable flow field;remote cen-tralized control,integrate PLC remote monitoring system,to achieve collaborative control with the production system.At the same time,anti-static filter materials and pipeline insulation technology are used to solve the risk of explosion and the problem of condensation wa-ter in low-temperature environments.Engineering practice shows that the optimized circulating ventilation system maintains a stable dust concentration of 2.49-2.84 mg/m^(3) in the workshop during continuous production(the national standard limit is 4 mg/m^(3)),and the dust reduction efficiency reaches 95%.The system has been running continuously for over 13 months,and the innovative design of the circulating ventilation and dust removal technology solution has solved the contradiction between winter ventilation and dust control in cold mining areas,achieving long-term stable control of dust concentration in the screening and crushing workshops.Its technological path has significant innovation and engineering applicability,providing replicable solutions for similar high dust and low-temperature in-dustrial scenarios.
作者
袁地镜
Yuan Dijing(CCTEG Chongqing Research Institute,Chongqing 400037,China)
出处
《能源与环保》
2025年第8期36-42,共7页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
十四五国家重点研发计划(2022YFB4703603)。
关键词
筛分破碎楼
循环通风系统
多级联动优化
CFD模拟
screening and crushing workshops
circulating ventilation system
multi-level linkage optimization
CFD simulation
