摘要
二氧化碳的吸收再生过程主要是由吸收、闪蒸和气提三部分组成。本次设计选用的脱碳剂是聚乙二醇二甲醚（NHD），属于物理吸收法。主要的设备是吸收塔和气提塔。在计算的过程中，首先根据所给的物料组成和工艺条件进行物料恒算和热量恒算，再进行塔设备的计算、校核及辅助设备的计算或选型。
吸收段的计算结果如下：
二氧化碳的脱除量2909.4
，NHD
的用量184.2
；塔底流出的富液带出的热量14269139.99kJ/h
，溶液温度升高了5℃；塔径为1.6m，填料层高度为13.47m，塔压降为3002.7Pa。
解吸段的计算结果如下：
闪蒸出的二氧化碳的量2735.7
，二氧化碳的回收率为94%
，溶液带出的热量10142141.09kJ/h，闪蒸的容积为0.26
。
气提出的二氧化碳的量157.15
，氮气的用量1105.2
；塔底流出的贫液带出的热量6022054.3kJ/h
，溶液温度为26℃；上段塔径1.4m，下段塔径1.5m，填料层高度为5.7m，塔压降为2021.4Pa。
[关键词] 吸收、闪蒸、气提
ABSTRACT
The decarbon and regeneration of carbon dioxide process is primarily composed by three parts: absorption, flash vaporization and gas stripping. This design uses polyethylene glycol dimethl ether (NHD) to decarbon, which is the physical absorption method. The main device is absorption column and stripper. In the process of calculation, firstly make material constant calculation and heat constant calculation, and then is the calculation of tower equipment, checking and ancillary equipment’s calculation or selection.
Absorption segment’s results are as follows:
The amount of carbon dioxide removel is 2909.4m³/h and the amount of NHD is 1 84.2m³/h; the heat of liquid-rich flow from tower bottom is 14269139.99kJ/h and the temperature of solution rises 5℃; the tower diameter is 1.6m, the height of packing layer is 13.47m and the column pressure dropping is 3002.7Pa.
The desorption segment’s results are as follows:
The amount of carbon dioxide flashes is 2735.7m³/h, the recovery rate of carbon dioxide is 94%, the heat brought out from solution is 10142141.09kJ/h and the volume of flash trough is 0.26m³.
The amount of carbon dioxide stripped out is 157.15m³/h and the amount of nitwgen is 1105.2m³/h; the heat of barren liquor from tower bottom is 6022054.3kJ/h and the temperature of solution is 26℃; the upper column diameter is1.4m, the lower column diameter is 1.5m and the column pressure dropping is 2 021.4Pa.
Key Words: absorption，flash，stripping
