Dissertation
Dissertation > Industrial Technology > Chemical Industry > Basic inorganic chemical industry > Ammonia and ammonium salt industry > Ammonia Industry

Design Modification for CO2 Absorber in Ammonia Plant Capacity Increasing from 1000T/d to 1500T/d

Author SunGuang
Tutor XiaDaiKuan;YuanYong
School Sichuan University
Course Chemical Engineering
Keywords Benfield law decarburization Expansion and reconstruction Loading point Structured packing Design calculations
CLC TQ113.2
Type Master's thesis
Year 2003
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In the 1970s, most of the domestic introduction of the 30 million tons of synthetic ammonia Benfield law decarburization process, has been running for 30 years, must be reformed and updated to meet the requirements of the development of production technology, the expansion and reconstruction is important to choose one. Based on the the Lutianhua company 300,000 tons of synthetic ammonia plant in 88 years of technical innovation when the original introduction of benzene Phil Law decarburization process has changed to the actual situation of the low heat benzene Phil Law Removal Process (LHB), analyzed further Capacity Expansion of program choice for decarbonization absorption tower, up and down the tower. detailed calculations decarburization absorption tower to 1500T / d from the 1000T / d load absorber material, heat balance and hydrodynamics, mass transfer performance . Calculated in Appendix review currently the 1000T / d load hydrodynamics, mass transfer performance. First, can be more efficient CO 2 absorbers expansion and reconstruction, but through the analysis and comparison of of UOP's low thermal benzene of Phil Law decarburization process (LHB) and BASF aMDEA decarburization process that The comprehensive consideration the Lutianhua has chosen low heat Benfield law the actual situation and the energy consumption of two scenarios, an investment and long-term operating costs should continue to choose UOP's low thermal the Benfield method decarbonization processes (LHB) to existing installations The 1500T / d expansion and reconstruction. Rebuild or build a parallel decarburization absorption tower to increase decarburization, but the huge investment, equipment layout difficulties, the transformation of large, complex run operation after the transformation, and generally do not use it more economical options this design. Third efficient packing and to improved absorption tower internal structure to achieve the purpose of the device expansion. This scenario, small changes in the system, not investment, the renovation work completed during parking overhaul. Tower body unchanged after the rise of the gas-liquid load, the system re-design calculations. The formula used for this purpose in recent years than the novel the packed tower upload point gas velocity and classic Pan-point gas velocity of absorber fluid mechanics and filler Selection Sichuan University engineering master's degree thesis I000T / d ammonia change 150OT / d off carbon absorption tower renovation design calculations. The calculation results show that the absorption tower can UOP low thermal benzene Fuerth process (LHB), replace the following paragraph filler structured packing 15O0T / d load conditions, to continue to maintain stable operation, the pressure drop, flooding point gas velocity, gas fluxes within the safe range. By the mass transfer coefficient and the filler volume calculation, in the case of the same packing height to meet the expansion and reconstruction of the COZ absorption of load requirements. All calculations in this article by means of a spreadsheet (Excel) to complete this design calculations for Shanghai days of using this program decarburization system transformation provides a basis for calculation of the expansion amplitude reference.

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