4655809 Air separation process with single distillation column with segregated heat pump cycle

1987 ◽  
Vol 7 (5) ◽  
pp. iv
Keyword(s):  
Heat Pump ◽  
Distillation Column ◽  
Separation Process ◽  
Air Separation

Exergy Analysis of a Novel Cryogenic Concept for the Liquefaction of Natural Gas Integrated Into an Air Separation Process

2016 ◽  
Author(s):  
S. Tesch ◽  
T. Morosuk ◽  
G. Tsatsaronis
Keyword(s):  
Natural Gas ◽  
Power Consumption ◽  
Exergy Analysis ◽  
Primary Energy ◽  
Separation Process ◽  
Air Separation ◽  
Total Power ◽  
Separation Unit ◽  
Total Power Consumption ◽  
Liquefaction Temperature

The increasing demand for primary energy leads to a growing market of natural gas and the associated market for liquefied natural gas (LNG) increases, too. The liquefaction of natural gas is an energy- and cost-intensive process. After exploration, natural gas, is pretreated and cooled to the liquefaction temperature of around −160°C. In this paper, a novel concept for the integration of the liquefaction of natural gas into an air separation process is introduced. The system is evaluated from the energetic and exergetic points of view. Additionally, an advanced exergy analysis is conducted. The analysis of the concepts shows the effect of important parameters regarding the maximum amount of liquefiable of natural gas and the total power consumption. Comparing the different cases, the amount of LNG production could be increased by two thirds, while the power consumption is doubled. The results of the exergy analysis show, that the introduction of the liquefaction of natural gas has a positive effect on the exergetic efficiency of a convetional air separation unit, which increases from 38% to 49%.

Simulation and Analysis of Cryogenic Air Separation Process with LNG Cold Energy Utilization

2014 ◽  
Vol 881-883 ◽  
pp. 653-658 ◽  
Author(s):  
Yong Qiang Xiong ◽  
Ben Hua
Keyword(s):  
Energy Consumption ◽  
Liquid Nitrogen ◽  
Electric Energy ◽  
Separation Process ◽  
Air Separation ◽  
Energy Utilization ◽  
Utilization Efficiency ◽  
Pure Oxygen ◽  
Pure Nitrogen ◽  
Cold Energy

In this paper, a cryogenic air separation process with LNG cold energy utilization is proposed to produce liquid nitrogen and high pressure pure oxygen gas economically. To reduce the electric energy consumption of air separation products, liquid nitrogen have been produced by condensing the separated pure nitrogen gas with LNG cold energy utilization, and the recycled nitrogen is served to transfer cold energy from LNG stream to cool off air stream in the proposed cryogenic air separation process. The specifications of streams and the major equipments of the air separation process are simulated with Aspen Plus software and the main parameters analysis are performed. The results show that the energy consumption of the proposed air separation process with LNG cold energy utilization decreased about 58.2% compared with a conventional cryogenic air separation process. The compressed pressure of recycled nitrogen has a big impact on the cost of air separation products and utilization efficiency of LNG cold energy. The LNG cold energy could be fully utilized when the recycled nitrogen has been compressed to above 6.5MPa.

Simulation Model for ASU Distillation Column of a 300 MW Oxy-Fuel Pulverized Coal Boiler

2014 ◽  
Vol 997 ◽  
pp. 674-677
Author(s):  
Jian Qiang Gao ◽  
Liang Jie Shen ◽  
Ning Wang ◽  
Xiang Zhao Yang
Keyword(s):  
Liquid Nitrogen ◽  
Distillation Column ◽  
Air Flow ◽  
Pulverized Coal ◽  
Air Separation ◽  
Separation System ◽  
Simulation Procedure ◽  
Pulverized Coal Boiler ◽  
Fortran Language ◽  
Coal Boiler

Based on a 300MW Oxy-fuel pulverized coal boiler,this paper established a dynamic mathematical model of air separation system distillation column, and compiled simulation procedure with the Fortran language on the platform of IMMS. With distillation column as the object of the research, it carried on a disturbance experiment about the outlet air flow of purifier and extractable volume of liquid nitrogen in lower tower. The results demonstrate that when the outlet air flow of purifier decreases, the nitrogen purity in gas is reduced by 0.39%, and the oxygen purity in liquid is reduced by 1.5%;when the outlet air flow of purifier is constant and extractable volume of liquid nitrogen decreases, the nitrogen purity in gas is increased by 0.2%, and the oxygen purity in liquid is increased by 0.06%.

scholarly journals Adaptive Dual Composition Control of a Binary Distillation Column with a Heat Pump

1988 ◽  
Vol 21 (7) ◽  
pp. 193-198 ◽  
Author(s):  
C.S. Nielsen ◽  
H.W. Andersen ◽  
H. Brabrand ◽  
S.B. Jørgensen
Keyword(s):  
Heat Pump ◽  
Distillation Column ◽  
Composition Control

Experimental study on a four-bed PSA air separation process

AIChE Journal ◽  
1994 ◽  
Vol 40 (12) ◽  
pp. 1976-1982 ◽  
Author(s):  
A. S. T. Chiang ◽  
Y. L. Chung ◽  
Chao-Wen Cheng ◽  
Te-Hsien Hung ◽  
T. Y. Lee
Keyword(s):  
Experimental Study ◽  
Separation Process ◽  
Air Separation

Energy-Saving Characteristics of Benzene-Toluene Mixtures in Heat Pump Distillation Column

2012 ◽  
Vol 455-456 ◽  
pp. 630-634
Author(s):  
Zheng Ming Tong ◽  
Chao Li ◽  
Jia Lei Lu ◽  
Kai Zhu
Keyword(s):  
Energy Saving ◽  
Heat Pump ◽  
Distillation Column ◽  
Energy Savings ◽  
Operating Conditions ◽  
Material System ◽  
Industrial Energy ◽  
Energy Consuming ◽  
Benzene Toluene ◽  
Consuming Country

China is a big industrial energy consuming country. The largest proportion of energy consuming is the operations of separation in chemical industry, and the energy consumption of the distillation is the highest in separation. Therefore, it is very important to research energy-saving issues of the process of distillation in today's circumstances of the energy shortage. This article describes the model of heat pump distillation column,and its characteristics, uses static simulation programs to simulate operating conditions in the atmospheric pressure for the benzene-toluene material system, and studys effects of the different feed states on the energy-saving of heat pump distillation column. The results will be compared with the conventional distillation column, and it was showed that for benzene-toluene system, the heat pump distillation column is more remarkable than the conventional distillation column in energy savings, and its energy saving rate can reach 46%.

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