Energy Reduction in a Divided Wall Distillation Column

2008 ◽  
Vol 59 (7) ◽  
Author(s):  
Raluca Isopescu ◽  
Alexandru Woinaroschy ◽  
Loredana Draghiciu
Keyword(s):  
Distillation Column ◽  
Multicomponent Mixture ◽  
Hydrocarbon Mixture ◽  
Feed Composition ◽  
Dividing Wall Column ◽  
Mixture Separation ◽  
Middle Component ◽  
Benzene Toluene ◽  
Reduction Of Energy Consumption

The paper presents the analysis of the thermal efficiency of a dividing wall distillation column and the influence of the feed composition on the reduction of energy consumption compared to a classical scheme of multicomponent mixture separation. The study relays on rigorous simulations in HYSYSTM using thermodynamically equivalent schemes. A case study is presented for the separation of a hydrocarbon mixture: benzene, toluene, ethylbenzene, o-xylene separated in three products in a dividing wall column. The dividing wall column solution led to about 40 % energy saving. The efficiency of a dividing wall column increases when the middle component is in large amount in the feed.

scholarly journals Optimal Synthesis of Energy Efficient Distillation Columns Sequence Using Driving Force Method

2015 ◽  
Vol 9 (7) ◽  
pp. 154
Author(s):  
Ahmad Nafais Rahimi ◽  
Mohd. Faris Mustafa ◽  
Muhammad Zakwan Zaine ◽  
Norazana Ibrahim ◽  
Kamarul Asri Ibrahim ◽  
...  
Keyword(s):  
Energy Efficient ◽  
Driving Force ◽  
Distillation Column ◽  
Energy Analysis ◽  
Separation Process ◽  
Hydrocarbon Mixture ◽  
Optimal Sequence ◽  
Distillation Columns ◽  
Force Method ◽  
Mixture Separation

This paper presents the study of the optimal synthesis of energy efficient distillation columns (EEDCs) sequenceby using the driving force method. In order to perform the study and analysis, the EEDCs sequence methodologyhas been developed. Accordingly, the methodology consists of four hierarchical sequential steps; Step 1: ExistingSequence Energy Analysis, Step 2: Optimal Sequence Determination, Step 3: Optimal Sequence Energy Analysis,and Step 4: Energy Comparison. The capability of this methodology has been tested in designing minimumenergy distillation column sequence for hydrocarbon mixture separation process. The results show that themaximum of 39.6 % energy reduction was able to achieve by changing the sequence suggested by the drivingforce method. It can be concluded that, the sequence determined by the driving force method is able to reduceenergy requirement for hydrocarbon mixture separation process. All of this findings show that the methodologyis able to design minimum energy distillation column sequence for hydrocarbon mixture separation process in aneasy, practical and systematic manner.

scholarly journals Reduction of Energy Consumption in Hotels with Aerothermal Energy. Case Study: Canary Islands (Spain)

2018 ◽  
Vol 7 (3.32) ◽  
pp. 127
Author(s):  
Francisco Javier Díaz Perez ◽  
David Chinarro ◽  
M Rosa Pino Otín ◽  
Ricardo Díaz Martín ◽  
Adib Guardiola Mouhaffel
Keyword(s):  
Canary Islands ◽  
Water System ◽  
Heat Pumps ◽  
Hot Water ◽  
Hourly Rate ◽  
The Hours ◽  
Reduction Of Energy Consumption ◽  
Opening And Closing ◽  
And Control

This article presents a management model and control of energy efficiency in hotels adapted to the consumption patterns that ensure the comfort requirements of customers and integrated into the environment of an intelligent tourist complex. The analysis of the hot water system (DHW) of two hotels in the Canary Islands (Spain) in relation to their occupation, yields a solution based on renewable energies using high temperature heat pumps with aerothermal dissipation and supported by boilers of existing LPG propane. The control by programmable automatons (PLC) integrated in a system of control and acquisition of data (SCADA) optimizes the systems to maintain the maximum accumulated energy during the periods of cheapest electric tariff, by means of a system of opening and closing of hydraulic Valves that It manages to adjust the demand of DHW consumption to achieve the highest energy accumulation during the hours with the cheapest electricity tariff. The result after two and a half years of activity registration is a faster return on investment due to the optimized energy management of the system, through the control of operating hours adjusted to the needs of customers and the hourly rate. It has also been predicted that during the estimated 12 years of the system will have saved more than € 1,179,737 and thermal 8,780,005 kWh in a hotel 1 and € 1,315,104 and thermal 9,522,301 kWh in the hotel 2. This model shown can be seen how economically and energetically very efficient.  

scholarly journals Investigation on Certification and Evaluation Method of Harmful Substances Release from Furniture Products in China

2019 ◽  
Vol 136 ◽  
pp. 04099
Author(s):  
Xiuxia Yuan ◽  
Haochun Yan ◽  
Jia Liu
Keyword(s):  
Evaluation System ◽  
Indoor Air Pollution ◽  
Evaluation Method ◽  
Existing Problems ◽  
Volatile Organic ◽  
Other Substances ◽  
Benzene Toluene ◽  
Harmful Substances ◽  
Production Industry

Furniture products are the main sources of indoor air pollution due to the emission of formaldehyde and volatile organic compounds (VOCs). It is great significant to establish a scientific certification and evaluation system to promote furniture manufacturers to reduce the harmful substances release in furniture products and protect human health in China. This paper describes an investigation on release of formaldehyde, soluble heavy metals, benzene, toluene, xylene and other substances from 28 furniture products by dryer method and environmental chamber method. Studies on current development status of certification and evaluation of harmful substance release from furniture products in China were carried out. Case study of certification and evaluation method suitable for furniture production industry was made, and the existing problems and suggestions were provided for improvement of certification and evaluation method system based on the characteristics of furniture industry.

Sustainable Integrated Process Design and Control for a Distillation Column System

2014 ◽  
Vol 625 ◽  
pp. 470-473 ◽  
Author(s):  
Mohamad Zulkhairi Nordin ◽  
Mohamad Dzulfadzli Jais ◽  
Mohd Kamaruddin Abd Hamid
Keyword(s):  
Process Design ◽  
Distillation Column ◽  
Controller Design ◽  
Optimal Solution ◽  
Design Analysis ◽  
Integrated Process ◽  
Column System ◽  
Benzene Toluene ◽  
And Control ◽  
Control Methodology

The objective of this paper is to develop a sustainable integrated process design and control methodology for a distillation column system. The sustainable integrated process design and control problem for a distillation column system is typically formulated as a mathematical programming (optimization with constraints) problem, and solved by decomposing it to six sequential hierarchical sub-problems: (i) pre-analysis, (ii) design analysis, (iii) controller design analysis, (iv) sustainability analysis, (v) detailed economics analysis and (vi) final selection and verification. The results through case study of benzene-toluene separation process shows the proposed methodology is capable to find the optimal solution that satisfies design, control, sustainability and economic criteria in a simple and efficient way.

scholarly journals Studies of Freon mixture separation using a large-scale model of distillation column

2020 ◽  
Vol 1614 ◽  
pp. 012067
Author(s):  
A N Pavlenko ◽  
V E Zhukov ◽  
E Yu Slesareva ◽  
Chr Boyadjiev ◽  
D Dzhonova-Atanasova
Keyword(s):  
Large Scale ◽  
Distillation Column ◽  
Scale Model ◽  
Mixture Separation ◽  
Large Scale Model

Avoidance Reactions of Juvenile Coho Salmon (Oncorhynchus kisutch) to Monocyclic Aromatics

1981 ◽  
Vol 38 (7) ◽  
pp. 772-778 ◽  
Author(s):  
Desmond J. Maynard ◽  
Douglas D. Weber
Keyword(s):  
Aromatic Hydrocarbons ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Hydrocarbon Mixture ◽  
Monocyclic Aromatic Hydrocarbons ◽  
Electrophysiological Recordings ◽  
Y Maze ◽  
Short Term Exposure ◽  
Benzene Toluene ◽  
Avoidance Reactions

Presmolt coho salmon (Oncorhynchus kisutch) tested in a Y-maze avoided a mixture of monocyclic aromatic hydrocarbons at concentrations of 3–4 mg/L while smolting coho salmon avoided concentrations of less than 2 mg/L. Three components (benzene, toluene, o-xylene) of the mixture were tested individually with presmolt salmon and each was avoided at a lower concentration than when compared with the total hydrocarbon concentration of the mixture; o-xylene was most repellent, causing statistically significant avoidance at a concentration of 0.2 mg/L. Electrophysiological recordings from the olfactory bulb indicated that short-term exposure of juvenile coho salmon to monocyclic aromatic hydrocarbons at 4 mg/L did not disrupt this chemosensory modality; the olfactory system was stimulated by an aromatic hydrocarbon mixture at concentrations correlating with observed avoidance behavior.Key words: salmon, behavior, avoidance, monocyclic aromatic hydrocarbons, Oncorhynchus, olfactory EEG

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