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Thermal Calculation of Dust-Preparation Systems in Boiler Plants: A New Approach
Thermal Engineering Pub Date : 2021-06-16 , DOI: 10.1134/s0040601521060057
M. N. Maidanik , A. N. Tugov , V. M. Supranov

Abstract

A new approach to thermal calculation of dust-preparation systems, at which the dust system is considered and calculated as part of the boiler plant operating in a single technological cycle with the boiler and having a common dust-gas-air duct with it. This approach provides for the possibility of conducting a joint thermal calculation of the boiler and dust systems. The thermal balance of the dust system is considered with determining the parameters of the drying agent according to the actual composition of the flue gas and air flows directed to the dust system, calculated from the general material balance of the gas-air duct of the boiler plant with the boiler, and the calculation of the enthalpy of gases and air in accordance with the standards of thermal calculation of boilers for the full elemental composition of burned fuels and their mixtures. Basic formulas for calculating the components of the heat balance of a dust system and methods for determining the output parameters of the drying agent are given. The proposed method of thermal calculation makes it possible to take into account the actual heat supplied with the drying agent when burning not only one type of fuel but also a mixture of solid fuels as well as solid fuels together with gaseous and/or liquid fuels. According to the developed algorithm for thermal calculation, along with the thermal calculation of the dust system, the general material balances of the gas-air path of the boiler plant and the dust-gas-air path of the boiler furnace and burner are compiled, the parameters of the drying agent along its path are calculated, taking into account the actual places of entry of the flows of the recirculating drying agent, air suction, and air to the seal of the mills. The algorithm for thermal calculation of dust systems is implemented in a computer program that has been tested in the calculations of several boiler installations, including thermal calculations joint with the boiler.



中文翻译:

锅炉厂除尘系统的热计算:一种新方法

摘要

一种新的粉尘制备系统热计算方法,在该方法中,粉尘系统被视为锅炉设备的一部分,与锅炉在单一技术循环中运行,并与锅炉具有共同的粉尘-气体-空气管道。这种方法提供了对锅炉和粉尘系统进行联合热计算的可能性。考虑除尘系统的热平衡,根据烟气和进入除尘系统的空气流量的实际成分确定干燥剂的参数,根据锅炉烟气管道的一般物料平衡计算带锅炉的工厂,根据锅炉燃烧燃料及其混合物的全部元素组成的热计算标准计算气体和空气的焓。给出了计算粉尘系统热平衡分量的基本公式和确定干燥剂输出参数的方法。当不仅燃烧一种类型的燃料而且燃烧固体燃料的混合物以及固体燃料与气体和/或液体燃料一起燃烧时,所提出的热计算方法使得可以考虑由干燥剂供给的实际热量。根据开发的热计算算法,连同粉尘系统的热计算,编制了锅炉装置的气-风路和锅炉炉膛和燃烧器的粉尘-气-风路的一般物料平衡表,计算了沿其路径的干燥剂参数,并考虑了实际场所。再循环干燥剂、空气吸入和空气进入磨机密封件。粉尘系统的热计算算法是在计算机程序中实现的,该程序已在多个锅炉装置的计算中进行了测试,包括与锅炉结合的热计算。

更新日期:2021-06-17
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