燃煤电厂原煤仓防堵煤设计研究

Research on the Prevention of Coal Blocking in Power Plant Raw Coal Bunker

[目的]燃煤电厂制粉系统堵煤是一个行业难题,特别是原煤仓堵煤。目前市场上防堵煤技术种类众多,但使用效果众说纷纭,文章旨在找到一个合适的防堵煤技术。[方法]分析了燃煤电厂制粉系统堵煤的原因;研究了双曲线型煤斗、不锈钢煤斗或内衬不锈钢设计、液压对开插板门、落煤管合理设计等防堵措施;重点针对旋转清堵机技术进行了调研。[结果]研究表明:旋转清堵机技术对于解决原煤仓堵煤有明显效果,但动静结合处均存在不同程度的润滑油泄露问题,需要对其密封型式、密封件等进行重点监控。[结论]各种防堵煤技术中旋转清堵机技术具有明显优势,值得推广使用。制粉系统防堵煤是一个综合工程,无论采用何种技术,都必须加强煤源、煤场的科学管理,实现入炉煤水分、粘度等指标的合理控制。

[Introduction]Coal blocking of pulverizing system is a big problem in power plant,especially for coal bunker.At present,there are many types of anti-blocking coal technologies on the market,but there are different opinions on the use effect.This paper aims to find a useful technology to prevent the coal anti-blocking.[Method]The paper studied the coal blocking reasons and same anti-blocking technologies,such as hyperbolic coal hopper,stainless steel hopper,hydraulic split board damper,reasonable design of falling coal pipe etc.The research focused on the technology of rotary blockage clearing machine.[Result]The results show that the technology has obvious effect on solving the problem of coal plugging in the coal bunker.But there are lubricating oil leakage at the joints between the static and dynamic parts,which shall be paid more attention on sealing selection.[Conclusion]The rotary blockage clearing machine technology in various anti-blocking coal technologies has obvious advantages and is worthy of popularization.The prevention of coal plugging in the pulverizing system is a comprehensive project.Regardless of the technology used,it is necessary to strengthen the scientific management of the coal source and coal yard to achieve the control of the moisture and viscosity of the coal into the furnace.