入厂煤入炉煤热值差大的原因分析及对策

Cause Analysis and Countermeasures of Large Difference in Calorific Value of Incoming Coal

火力发电厂入厂与入炉煤热值差是当前对火电厂一项越来越重要的经济考核指标;入厂与入炉煤热值差就是指电厂入厂商品煤的收到基低位发热量与入炉煤收到基低位发热量的差值。这一指标可有效反映出燃料质检工作及燃料库存管理的水平。国家相关标准对热值差作出了规定,要求入厂煤与入炉煤低位热值差小于502 J/G,国内各发电集团根据不同生产特点,要求完成的热值差更小。要完成这一指标,需要燃料管理部门从细节着手,从管理和技术上下很大功夫才能实现这一控制目标。实际工作中,引起火电厂出现热值超差的原因有多种因素,涉及到入厂、入炉煤采制化各个环节及煤场存煤管理等方面,说明工作中肯定存在未做到位的情况,应尽快分析清楚原因,采取措施减少热值损失,提高火电厂的经济效益。文中全面、系统地分析了热值超差可能存在的原因,并相应提出了针对性的检查分析办法。

The calorific value difference between incoming and fired coal in thermal power plant is a more and more important economic assessment index for thermal power plant at present;The calorific value difference between incoming and fired coal refers to the difference between the received base low calorific value of commercial coal in the power plant and the received base low calorific value of fired coal.This index can effectively reflect the level of fuel quality inspection and fuel inventory management.Relevant national standards stipulate the calorific value difference,which requires that the low calorific value difference between incoming coal and incoming coal is less than 502J/G.domestic power generation groups require smaller calorific value difference according to different production characteristics.In order to achieve this target,the fuel management department needs to start with details and make great efforts in management and technology in order to achieve this control goal.In practical work,there are many factors that cause the calorific value out of tolerance of thermal power plant,including all links of coal mining and preparation in the plant and furnace and coal storage management in the coal yard.It shows that there must be a situation that has not been done in place in the work.We should analyze the reasons as soon as possible and take measures to reduce the calorific value loss and improve the economic benefits of thermal power plant.This paper comprehensively and systematically analyzes the possible causes of calorific value out of tolerance,and puts forward targeted inspection and analysis methods accordingly.