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炼钢转炉余能余热主要包括转炉烟气的显热和转炉煤气的潜热以及转炉渣的显热,合理回收利用转炉余能余热是实现转炉负能炼钢的关键。建立了转炉煤气驱动的开式燃气轮机热电冷联产(CCHP)装置有限时间热力学(FTT)模型。以装置总可用能率和第一定律效率为目标,在无煤气质量流率和装置尺寸约束下,优化了压气机进口相对压降和压比,得到了最大总可用能率和相应的煤气质量流率;在煤气质量流率和装置尺寸约束下,优化了压气机进口相对压降,得到了最优效率,同时联产装置各部件的面积分配也得到了优化。分析了煤气显热利用、放散率、循环总温比、发生器工质温度和供热温度等参数对装置最优性能的影响。
The residual heat of the steelmaking converter mainly includes the sensible heat of the converter flue gas and the latent heat of the converter gas as well as the sensible heat of the converter slag. Reasonable recovery and utilization of the excess heat from the converter is the key to achieve the converter negative energy steelmaking. A finite-time thermodynamics (FTT) model of a converter gas-driven open gas turbine combined heat and power (CCHP) unit was established. With the total available energy of the plant and the efficiency of the first law as the goal, the relative pressure drop and pressure ratio at the compressor inlet are optimized under the condition of no gas mass flow rate and device size, and the maximum total available energy and the corresponding gas mass flow rate Under the restriction of gas mass flow rate and device size, the relative pressure drop at the compressor inlet is optimized and the optimal efficiency is obtained, and the area distribution of each component of the co-generation device is also optimized. The effects of sensible heat utilization, desorption rate, circulating total temperature ratio, generator working temperature and heating temperature on the optimal performance of the device were analyzed.