Improving The Economy Of Vapor Cooling Residual Heat Boiler By Increasing Gas Water Heat Exchanger

With the development and application of converter vaporization cooling technology,the life of cooling parts is greatly improved.It can not only ensure the full development of primary energy,but also effectively recover and utilize secondary energy,reduce the cost of steel and increase the output of steel.As the cooling mode of vaporization cooling is reliable and the cooling quality is high,it can meet all kinds of dust removal and purification methods from the perspective of technical development,so as to minimize emissions.In general plant design,the heat at the outlet of flue is often collected by the hood,and then sent to the dust remover through the pipe directly after spraying water to reduce the temperature.Through wet dedusting,electric dedusting,bag dedusting and other measures,the dust remover can reduce the flue gas temperature and purify the harmful substances in the flue gas,so as to meet the requirements of national standards.Through design,calculation,simulation and field investigation with Party A,the gas water heat exchange device is added in the pipeline connecting the vaporization cooling flue and the dust remover,which can not only meet the above requirements,but also greatly improve the overall economy of flue gas utilization and reduce the investment of dust removal equipment.After calculation and communication with the equipment manufacturer,by adding gas-water heat exchange device,not only can the flue gas temperature be reduced from 900 ℃ discharged by the vaporization cooling waste heat boiler to 180 ℃ quickly and efficiently,but also a large number of steam can be prepared,which can be used for secondary development or connected to the low-pressure steam pipe network in the plant area to achieve more objective economic benefits.Of course,due to the large amount of water produced by saturated steam in the process of transportation,the water hammer phenomenon is very serious in the operation of the steam pipeline with water.Therefore,the establishment of heat exchange station nearthe converter workshop can not only make full use of the secondary steam again,produce economic benefits,but also alleviate the water hammer phenomenon of the steam pipeline and reduce the generation of saturated water The required equipment parameters are calculated for the process of heat exchanger and heat exchange unit and the selection of public and auxiliary equipment.The obtained equipment parameters have a direct impact on the price of the equipment.Through the secondary utilization of the steam generated by the waste heat boiler,different forms of heat exchanger or heat exchange unit are adopted to consider different forms of plant design,so as to make investment in process equipment and auxiliary equipment The economic benefits of different steam water heat exchangers are analyzed from the aspects of investment and construction of public and auxiliary facilities.Finally,the economic comparative analysis is carried out,and the most economical(heat exchange unit form)energy secondary utilization mode is adopted to fully recycle this part of energy.