Thermal Economy Analysis Of Waste Heat Recycling For A New Type Condenser In Langfang Thermal Power Plant

The overall utilization rate of energy in our country is lower and low-grade energy waste phenomenon is more common.In the northern area,due to the existence of winter heating period,if the existing heating equipment is improved by the technology,it can not only be used in the residual heat and waste heat resources to achieve energy-saving and reduce consumption.It can also reduce the environment pollution can be realizedThe conditions for low-grade energy reuse are to improve the taste of their energy.There is a lot of low-grade energy in the power plant,such as the cold source heat.It is good for the power plant to take advantage of these low-grade energy.By using the heat pump technology to improve these low-grade energy,it can meet the heating requirements.It not only can save energy and protect environment,but also can reduce emissions,so the social benefits are also more obvious.Taking 350MW heating project of Langfang thermal power plant as an example,residual heat recovery condenser of a new type for the wet cold unit is developed,and the temperature of the residual heat will be improved by the heat pump to ensure that the normal operation of the power plant unit during the winter heating period,residual heat recovery of the maximum amount is used.In this paper,the technical scheme of the residual heat recovery system,the main equipment type and the systems to which it is coordinated are determined,through the introduction of the heat pump type,model selection,heat economy calculation theory,new condense r and residual heat recovery system.Based on the calculation of heat economy,the heating capacity,the comprehensive benefit and economy of two heating systems?heater for heating network,heat pump+heater for heating network?are compared.The results show:this scheme of heat pump+heater for heating network is not only energy-saving,but also environmentally friendly,and reduce the emissions of CO₂ and SO₂.The total investment yield is about 12.43%,and the payback period of investment is short,A short payback period,the economy of good characteristics.