Design Optimization and Experimental Study of Flue Gas Waste Heat Recovery and Absorption Tower in Gas Power Plant
To reduce carbon emissions and effectively improve energy utilization efficiency,a waste heat recovery improvement design was implemented for a certain gas-fired combined heat and power plant's flue gas system.The existing waste heat spray tower was structurally optimized using the packed bed spray technology,transforming the heat absorption tower into a packed tower to enhance heat transfer per-formance.The results showed that the optimized flue gas waste heat recovery absorption tower not only e-liminated issues such as cavitation,vibration,and noise in the original system's water pump but also re-solved the problem of water loss in the heat exchanger tower.Under the premise of constant gas input and constant power output,the heat output was effectively increased by more than 10%,and the denitration efficiency remained stable at over 70%,with the lowest concentration of NOxmaintained below 10 mg/m3.Compared to conventional heating solutions,this waste heat recovery plan annually recovers 27 890 GJ of flue gas heat and brings substantial economic and environmental benefits,reducing natural gas consumption by approximately 867 000 cubic meters per heating season and decreasing CO2 emissions by around 1 610 tons per year.
gas-fired cogeneration plantflue gas waste heat recoveryspray absorber towerenergy saving and emission reductionenhanced heat transferoptimized design
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