Membrane Systems for Adsorption and Regeneration Cycle Problems in Air Drying Unit

Membrane Systems for Air Drying Unit

Bachelor Thesis , 2008 , 56 Pages , Grade: A

Engineering - Chemical Engineering

Abstract
Main problem in air drying unit is the adsorption and regeneration time. In a dryer adsorption continues for eight hours, after which the desiccant becomes saturated and cannot adsorb further moisture. In this study different types of desiccants are used. Instead of silica gel, activated alumina, zeolite, molecular sieves, activated carbon were used. Membrane dryer are used to solve our regeneration problem. Therefore membrane air dryer is more optimum for commercial processes than the other different dryers. Membrane dryer can be used for 24 hours for one week, so there is no need to standby this equipment. The construction and operation cost of membrane dryer is too simple and can also be used in hazardous condition.
Keywords: Adsorption time, Regeneration time, Activated carbon, Membrane dryer

Table of Contents

Acknowledgement

List of Tables

List of Figures

List of Acronyms

Abstract

1. Introduction
1.1 Background
1.2 Objectives
1.2.1 General objective
1.2.2 Specific Objectives

2. Literature Review
2.1 Accessories
2.1.1 Compressor
2.1.2 After Coolers
2.1.3 Separators
2.1.4 Prefilter
2.1.5 Dryer
2.1.6 After Filter
2.1.7 Receiver
2.2 Air Drying Unit
2.2.1 Specification of Drying Unit
2.2.2 Inlet Condition
2.2.1 Outlet Condition
2.2.3 Cycle Time
2.2.4 Filter
2.2.5 Adsorption Cycle
2.2.6 Regeneration & Service Cycle Change Over
2.3Air Dryer
2.3.1 Dryer Selection
2.4 Expected Outcome
2.4.1 Membrane Dryer
2.5 Balston Compressed Air Dryers
2.5.1Membrane Air Dryers
2.5.2 Application
2.5.3 Compressed Air Dryers
2.5.4 Application
2.5.5 Importance of Moisture Removal
2.6 Membrane Filtration Technology
2.6.1 Eliminating Downtime and Reducing Maintenance
2.7 Hankison Membrane Compressed Air Dryers
2.7.1Advantage of Hankison membrane dryer
2.7.2 Choice of Prefilter Package
2.8 Parker Membrane Air Dryer
2.8.1 Membrane Air Dryers for Analytical Instruments - Dry Air on Demand, Up tp 1,203 lpm
2.8.2 Principal Specification
2.8.3 Flow Rates (lpm)
2.9 Prism Membrane Low-Pressure Air Drying
2.9.1 Benefits
2.10 Types of Membranes
2.10.1 Isotropic membranes
2.10.2 Nonporous, dense membranes
2.10.3 Electrically Charged Membranes
2.10.4 Anisotropic membranes
2.10.5 Ceramic, Metal and Liquid Membranes
2.11 Maintenance

3. Working / Implementation of the Project Work/ Simulation
3.1 Cost Estimation in Membrane Air Dryer
3.1.1 Estimated Energy Costs
3.1.2 Actual Energy Cost
3.1.3 Labor Cost
3.1.4 Handling Costs
3.1.5 Estimated Fixed and Capital Costs
3.1.6 Actual Capital Cost
3.1.7 Actual Fixed Cost
3.1.8 Total Drying Cost
3.1.9 Dry or Market Wet
3.2 Cost Estimation

4. Result Analysis
4.1 Advantages of Membrane Dryers
4.2 Disadvantages of Membrane Dryers
4.3 Comparison of Dryer

5. Conclusion

References

Appendices

Appendix A: Water Content of Air at Various Temperatures and Pressures (Compressed air and gas institute, 1998)

Appendix B: Moisture Content of Saturated Air at Various Temperatures(Compressed air and gas institute, 1998)

Appendix C: Dew Point Conversion (Compressed air and gas institute, 1998)

• College: Bahir Dar University (Engineering Faculity)
• Course: Chemical Engineering
• Grade: A
• Author: Lecturer Temesgen Atnafu (Author)
• Publication Year: 2008
• Pages: 56
• Catalog Number: V208619
• ISBN (eBook): 9783656361657
• ISBN (Book): 9783656363446
• Language: English
• Tags: membrane, systems, adsorption, regeneration, cycle, problems, drying, unit