Study on theoretical calculation of desulfurization slurry injection pressurization device

doi:10.3969/j.issn.1674-1951.2021.05.009

Abstract

Abstract:

A coal-fired power plant can effectively eliminate gypsum rain by reducing the flue gas temperature and moisture content at the outlet of wet desulfurization system,realize desulfurization water saving and reduce the emission of condensable particulate matters such as ultrafine particles and aerosols.Some coal-fired power plants reduce the flue gas temperature and moisture content by installing cooling devices on desulfurization circulating slurry pipelines,resulting in increased resistance in the pipelines,insufficient outputs of the slurry circulating pumps and decreased desulfurization efficiencies.To solve these problems,by carrying out a theoretical analysis from the aspect of fluid mechanics,a theoretical design for a slurry injection and pressurization device was obtained.Taking a desulfurization project as an example,the design was proven to be feasible and provides theoretical guidance for the design of other slurry injection and pressurization devices.

Key words: coal-fired power plant, desulfurization water saving, condensable particulate matter, wet desulfurization system, slurry cooling device, injection and pressurization device

CLC Number:

TK09

ZHANG Xiqian, YANG Pengfei, WU Chong. Study on theoretical calculation of desulfurization slurry injection pressurization device[J]. Huadian Technology, 2021, 43(5): 59-63.

Figures/Tables 6

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项目	参数
浆液循环泵出口压力/kPa	230
浆液冷却装置阻力/kPa	10
升压泵出口压力/kPa	900
浆液循环泵轴功率/kW	560
浆液循环泵电机功率/kW	710
升压泵轴功率/kW	210
升压泵电机功率/kW	250

项目	工作浆液	引射浆液	混合浆液
温度/℃	47	47	47
表压/kPa	900	220	230
含固量/%	20	20	20
密度/(kg∙m^-3)	1 140	1 140	1 140
pH值	5.5	5.5	5.5
流量/(m³∙h^-1)	616	5 784	6 400

项目	数据
混合管直径d₃	610
接收室入口直径d₄	1 270
扩压管出口直径d_c	1 010
工作喷嘴出口直径d_p1	80
喷嘴至接收室入口距离l_c1	1 093
接收室长度l_c2	330