Studies On The System Operation Of Carbon Capture And Sequestration From Gas Steam Combined Cycle Power Plants Flue Gas

This study adopts the MEA and ionic liquid as absorbent for CO₂ capture system takai has retired power plant equipment was tested and the optimal operation of the system parameters.In the guarantee system of CO₂ capture rate is greater than 80% of the conditions,by adjusting the regeneration temperature,the temperature of flue gas into the absorption tower,absorbent circulation flow rate,etc.,CO₂ capture systems capture rate,steam consumption,power consumption,absorbent consumption,water consumption,in addition to salt water consumption and other system parameters and running status.MEA absorber test results show that CO₂ capture system for the capture efficiency of regeneration temperature sensitivity is higher.Regeneration during 112 113 ?,the temperature control system for CO₂ capture efficiency can reach 89 92%,energy consumption is 3.96 GJ/tCO₂.Examine MEA barren solution circulation flow rate is 5.0 6.0 m3 / h influence on absorption efficiency,that same regeneration temperature,improve the circulation flow rate of the absorbent for CO₂ absorption.Within the scope of the above circulation flow,the poor fluid circulation flow on the system power consumption,system absorbent circulation flow rate is 6.0 m3 / h,not power consumption have a significant impact on the system.Into the absorption tower flue gas temperature on the influence of absorption efficiency results show that when the MEA regeneration temperature control in 113±1?,the control tower flue gas temperature at35 37 ?,within the scope of the absorption tower has good absorption efficiency.From the perspective of reduce power consumption of the capture system,into the absorption tower flue gas temperature should be controlled at about 37 ?.Test procedure is to capture system to evaluate the water balance,water balance to achieve system,washing tower bottom average displacement was 60.9 kg/h,capture system as a whole in addition to salt water consumption is 0.48 t/hCO₂.Beijing GaojingPower Planthas retired CO₂ capture system test and the parameter optimization results show that the MEA regeneration in 113 + /-1 ?,the temperature control system for CO₂ capture rate averages 90.6%,MEA consumption is 1.93 kg/t CO₂,reboiler low pressure steam consumption is 1.67 t/tCO₂,reboiler heat load is 3.96GJ/tCO₂,CO₂ capture power consumption?excluding compressed and liquefied?of 98KWH/tCO₂,total operation cost?not including compression,liquefied?is 214.7CNY/tCO₂.The CO₂ capture system reach the design,technical indicators meet the requirements,can be achieved under the condition of artificial monitoring automatic control,safe operation.The most suitable sequestration for the captured CO₂ to Gaojing CHP should be sealed deep saline water layer.It had the highest storage volume,the safest storaging and monitoring means,in the event of storage layer leak a salty water activity of the upper reservoir,and because this layer production test equipment for the oil and gas drilling can continue to use,convenient for later production.But as a result of deep salt water layer seal without any commercial value,for CO₂ capture will only jump in investment,so the scheme is more suitable for governmental behavior.And oil and gas storage upfront investment is less,not only to enhance the efficiency of its production and mining enterprises are the important factors of joint investment.Because of Gaojing CHP at low gas content coal seam,the coal seam sequestration of the first idea is not suitable.