火电厂正平衡煤量自动计量管理系统的研究和开发

【作者】 徐红义；

【导师】 曹一家；

【作者基本信息】 浙江大学 ， 电气工程， 2005， 硕士

【摘要】 火力发电厂是资金、技术密集型企业,在市场经济形势下,火电厂只有进一步提高经济效率,降低发电成本,才能在日趋激烈的市场竞争中立于不败之地,才能最大限度地占有电力市场的份额。而提高经营管理水平、提高人员工作效率、技改创新、节能降耗是火电厂提高经济效率和经济效益的必由途径。 实施按入炉煤量正平衡计算发供电煤耗是电厂节能降耗的一项重要工作。传统的发供电煤耗计算由于缺乏对入炉煤量的有效计量,一般采用反平衡计算煤耗,由于影响煤耗的因素很多,而且机理很复杂,根据反平衡计算出来的煤耗与实际煤耗相差很大,不可能准确反映机组的运行状况和全厂的经济效率。按入炉煤量正平衡计算发供电煤耗就是以入炉煤计量煤量和入炉煤机械取样分析的低位发热量为依据进行煤耗计算。入炉煤计量煤量对正平衡发供电煤耗计算起着决定性的作用。 本文在分析电子皮带秤计量误差的基础上,对火电厂正平衡煤量自动计量管理系统进行了研究和开发,提出了自动计量管理系统的整体方案,针对正平衡煤量计量中皮带秤实物校验和入炉煤分炉计量两个关键性问题,提出了解决办法,并以浙江北仑发电厂为例,给出了具体实施方案。更多还原

【Abstract】 As an enterprise which concentrates on capital and technology, thermal power plant would be able to remain invincible in the drastic market competition and farthest possess the quotient of electric power market only if improving the economic efficiency and reducing the operation cost, under the situation of market economy. And enhancing the management level, heightening the personnel work efficiency, implementing technology innovation, reducing the energy consumption is the only way for thermal power plant to improve the economic efficiency and economic benefit.Implementing the regulation which calculates the coal consumption of power generation and supply according to the positive balance of coal quantity entering furnace is one of the important tasks for power plant to reduce the energy consumption. Traditionally, calculation of the coal consumption of power generation and supply commonly adopted the inverse-balance method due to the lack of effective measure of coal quantity entering furnace. The calculated result according to inverse-balance method will greatly differ with the actual coal consumption, because there are many factors affecting the coal consumption, and the mechanism of inverse-balance method is too complex. Therefore, it is impossible to reflect the operation state of the power generation units and the economic efficiency of the power plant. The coal consumption of power generation and supply according to the positive balance of coal quantity entering furnace is calculated based on the measured coalquantity entering furnace and the analytic quantity of heat of the mechanic coal sampler. The measurement of the coal quantity entering furnace will take the decisive role in the calculation of the coal consumption of power generation and supply according to the positive balance method.The objective of this paper is to investigate and exploit an automatic metering management system of positive balance coal quantity based on the analysis of the metering error of the electronic belt scale, and present an integral scheme of the automatic metering management system, put forward a solution to the two main problems in the positive balance coal quantity metering method, and present a concrete implementation scheme for Zhejiang Beilun Thermal Power Plant.更多还原