Research On CO₂ Capture Process By Amine Method And The Technology Of Heat Pump Energy Saving

Energy conservation and emission reduction,low-carbon economy is one of the hot topics in the science and technology circles,and it is also the focus of technology in the field of environmental protection.Emissions from fossil fuel combustion contribute to increasing CO₂ concentration in the atmosphere and increasing greenhouse effect.Coal-fired power plants are the concentrated source of CO₂,and the separation and capture of CO₂ in flue gas is of great significance to the mitigation of global climate change.Single ethanolamine?MEA?capture CO₂ technology is a mature CO₂ capture technology,which has obvious advantages such as fast absorption speed and good removal efficiency,but its operation cost is high and the energy consumption is high.Therefore,this project aims to reduce the energy dissipation energy of the CO₂ system in flue gas,and research the traditional CO₂ capture technology and energy saving technology,so as to reduce the collection cost.Taking the flue gas emitted by a power plant as the simulation object,the paper established the CO2 capture system model of MEA method by Aspen Plus.the method of MEA flue gas CO₂ capture process was simulated,analyzes the logistics system parameters,the CO₂ capture rate and the influence factors of reboiler load,and get the desorption bottom reboiler heat load values.The CO₂ capture system for heating of MVR heat pump was established based on MEA CO₂ capture technology,and the process simulation was carried out using Aspen Plus software.By comparing the traditional craft and MVR heat pump heating CO₂ capture technology of CO₂ capture rate and the energy consumption of desorption,showed that although the MVR heat pump heating technology of CO₂ capture rate is slightly lower than the traditional CO₂ capture process,but the energy consumption can reduce 25.62%of desorption under optimum condition.Using the pilot plant for traditional CO₂ capture technology and MVR heat pump CO₂capture system for experimental research,comparative analysis of the two systems capture and desorption energy consumption,the results show that the energy consumption of MVR heat pump systems under the optimum condition energy-saving rate of 23.07%.The collected law and the simulation results are basically consistent,which proves that the capture law of CO₂ in simulation and the energy saving effect of MVR heat pump system are verified.On the basis of the MVR heat pump heating process,a MEA CO₂ capture system with MVR and lithium bromide dual heat pump technology was put forward,and the lithium bromide heat pump technology was introduced into the process of MEA CO₂ capture.MVR,MVR heat pump and conventional lithium bromide double pump three capture rate and desorption of CO₂ capture system energy consumption theory is analyzed,the results show that compared with the former two kinds of systems,MVR lithium bromide double pump CO₂ capture system has higher capture rate and the desorption of lower energy consumption and best desorption energy consumption under the condition of energy saving rate is 32.5%.The results of this paper are of great significance to reduce the energy consumption of CO₂ capture in flue gas and to accelerate the application of single ethanolamine?MEA?to capture CO₂ technology.