| The regenerative cycle can effectively reduce the loss of the cold source and is one of the important ways to improve the efficiency of the steam power generation cycle.In order to improve the cycle efficiency of gas-fired generator sets,a double-regenerative cycle process route using steam turbine extraction and reheating feedwater and gas is proposed.By establishing single-regenerative system and double-regenerative system extraction parameter optimization models and Exergy analysis model to achieve the purpose of analyzing the feasibility mechanism of the process route.Taking a 50 MW pure-fired blast furnace gas generator set as a research case,the thermal parameters of the two regenerative systems are optimized through the principle of equivalent enthalpy drop.The research results show when the double-regenerative heat cycle is adopted and the regenerative gas stage is one-stage extraction,the absolute internal efficiency is increased by 0.14%,the power generation is increased by 0.71%,the coal consumption rate is reduced by 0.073 Nm3·（k Wh）-1.In order to explore the advantages and disadvantages of the energy-saving effect of the double-return heating system,EBSILON simulation software was used to simulate the two respectively.The thermal economy changes and exergy energy of the two regenerative systems under THA,75%THA and 50%THA conditions are compared.The results show that under THA conditions,the total exergy loss of the thermal system is 143.81 MW,under75%THA conditions,exergy loss is 109.56 MW,under 50%THA conditions,exergy loss is 78.68 MW;When considering the economic recovery benefits,the greater the end difference,the greater the cost of power generation.Through the simulation and calculation of the optimization of thermal parameters in the new process route,it is concluded which has good theoretical value for the way to broaden the cycle efficiency of the gas generating unit.It is useful for application engineering.Figure 36;Table 22;Reference 66... |
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