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Energy Analysis and Approaches to Saving Energy in the Natural Gas Refining Equipment

Author: YaoJing
Tutor: KuangGuoZhu
School: Dalian University of Technology
Course: Chemical Engineering
Keywords: Pinch analysis Effective energy loss Exergy Analysis Heat Pump Distillation Segmented absorption
CLC: TE683
Type: Master's thesis
Year: 2010
Downloads: 212
Quote: 0
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Abstract

The energy consumed by the separation process in the chemical process to account for a large proportion of total energy consumption in the process, and therefore has important implications for energy saving separation process. Desulfurization section and dehydration section are the natural gas purification apparatus relates to the regeneration of the absorbing liquid, i.e., the desorption process of the rich liquid, belongs to distillation under the conditions of the separation process. Energy saving in the process, the thermodynamic analysis of the need for the process, in order to understand the degree of utilization of the energy. Effective analysis method is an extremely efficient thermodynamic analysis method, through effective analysis, you can understand a process or a level of equipment energy use, and thus to find an effective way of energy saving. In this thesis, the first natural gas purification device energy analysis to identify the system to unreasonable, and analysis of the energy-saving potential of the system. The results showed that the heated public works and cooling can save the amount of public works were 778.392KW and 778.393KW by re-match for the heat flow shares. In pinch analysis based on the method for determining the value of the temperature difference contribution of virtual temperature method to conduct in-depth research. Using a new method to determine the contribution to the value of the temperature difference, heat exchanger network, consider the effective loss of temperature difference, and calculate the total annual cost of the heat exchanger network. The calculation results show that, compared with the traditional method to determine the temperature difference contribution value decreased by 23.31%, the total annual cost of the new method integrated heat exchanger network. System use can diagnose, optimization and structural optimization of operating parameters to optimize the system. The papers using chemical system simulation software PROII of the the desulphurization section and dehydration section simulation analysis of the various processes system-wide and individual unit equipment effective energy consumption, the full thermodynamic efficiency of the process and the effective loss situation. One way to reduce the absorption of the mass transfer driving force and thus reduce absorbent dosage to desulfurization section presents two rehabilitation programs, one is able to consume a certain mechanical low-temperature steam to raise the top of the tower bit of heat pump distillation process; Sectional absorption processes to reduce energy consumption. This thesis PROII two improved process simulation, and the various processes effective analysis. The results show that, to meet purification requirements, compared with the traditional process, these two processes has a certain energy-saving effect, heat pump distillation process and segmented absorption process of energy saving of 20.33% and 16.18%.

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