Studying On Heat Transfer Characteristics And The Engineering Application Of The Waste Heat Recovery Device Of Wet Electrostatic Precipitator

With the grim situation of energy in our country,the serious environmental pollution,the fog haze,the country and people more and more pay attention to energy saving and emission reduction.So the ultra-low emissions for coal-fired power plants work plan is proposed,that is to say,the emission requirement of the power plant is strictly.In the situation,This topic to the situation as an opportunity that is raised for the coal-fired power plant low temperature wet saturated exhaust for further processing,to introduce a set of coal-fired power plant of wet electric dust waste heat recovery system for further reducing dust and pollution,recycling condensation latent heat of flue gas.At the same time,the system can achieve to save energy and reduce consumption,alleviate the pressure of environmental pollution.Finally,the system can provide technical support for the coal-fired power plant ultra-low emissions.This paper comprehensive analyzes the power plant emissions of the situation and progress of research on power plant waste heat recovery heat exchange device,mainly,researching the condensation heat transfer.Based on Hua Dian group and commissary in Tianjin city power plant building experiment platform for research subject,the experimental analysis the theory of heat exchange.For the design and analysis,combining with the theoretical analysis of the condensation heat transfer to design the heat exchange device.Finned tube heat ex-changer is used as reference model,to design a new heat exchange device.Meanwhile,this paper calculates the various structural parameters of the heat transfer mechanism heat-exchange process.The analysis of calculation of smoke volume corresponding to different fin efficiency as well as the corresponding to different velocity of flow regime change.In order to make the water side flow in laminar flow? turbulent flow and transition flow of three kinds of flow pattern,this paper designs the three different test methods.Namely,through the simple transformation of experimental pipeline,ultimately the test gets a total of three groups of experimental data,the four main pipe flowing water,two main pipe flowing water and one main pipe flowing water.Through the experimental analysis,it is concluded that the condensation heat transfer performance of heat exchange device.At the same time,combined with the analysis of the experimental device.Theactual waste heat of a 300000 cold here generator in Zhang Qiu power plant makes used of design and calculation and calculates the different operation condition.Through the heat exchange device in the system design and the joint operation of absorption heat pump technology,residual heat is recovered as the greatest degree.So as to supply the air of not less than 15 preheat requirement? in the power plant,but also supply for the 100000 m2 building area for heating.Through the design and analysis of the heating season and the non-heating season,it is concluded that in the non-heating season,it don't need to run the heat pump units and secondary preheater because that can meet the demand of the supply air preheating.In heating season,when outdoor temperature is lower than 0 ?,it need to introduce the heat pump units to achieve the air heating demand,at the same time,when outdoor temperature is lower than 11.5 ? below zero,under the premise that satisfying the supply air temperature preheating,it need to introduce the peak heater to meet the heating requirements of the100000 m2 area.This set of system operation is expected to save standard coal 1930.4 t?reduce CO2 emissions 4812.49 t?reduce dust capacity 1312.67 t?reduce SO2 emissions of 144.78 t and reduce NOx emissions 72.39 t.