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Telephone: (201) 267-8670
www.modularprocess.com
Case Study:
Modular Distillation System
to Recover Spent Solvents
KMPS Wh...
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Case Study: Modular Distillation
System to Recover Spent Solvents
Bill Morrocco | Process Engineering Manager
www.linke...
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Case Study: Modular Distillation System to Recover Spent Solvents

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KMPS’ engineering team helped the client design a modular distillation system to recover and purify spent solvents, a process that is vital for the plant’s manufacturing operations. The system was fabricated and delivered under an expedited project schedule to meet a customer specified timeline.

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Case Study: Modular Distillation System to Recover Spent Solvents

  1. 1. Telephone: (201) 267-8670 www.modularprocess.com Case Study: Modular Distillation System to Recover Spent Solvents KMPS Whitepaper Series
  2. 2. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 2 Case Study: Modular Distillation System to Recover Spent Solvents and Expand Production Capacity KMPS’ engineering team helped the client design a modular distillation system to recover and purify spent solvents, a process that is vital for the plant’s manufacturing operations. The system was fabricated and delivered under an expedited project schedule to meet a customer specified timeline.  CLIENT: A Fortune 500 Company  INDUSTRY: Specialty Chemical Ingredients
  3. 3. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 3 Key Engineering Features  Turnkey scope of a multi-step separation process to recover and purify solvents including design, equipment, piping, instrumentation, fabrication, delivery, commissioning, start-up and performance guarantee.  Modular fabrication design was used instead of a more costly stick-build design, which afforded a shorter schedule.  Multi-effect distillation: the overhead vapors from the first column was used as the heat source to boil-up the second column for energy savings.  Extensive additional heat integration to reduce utility cost (OPEX) versus current operation.  Robust control scheme to accommodate variation of feed composition and product specifications.
  4. 4. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 4 Core Challenges  Process modeling of a non-ideal, azeotropic mixture.  Potential corrosion and fouling due to salts in feed.  Hybrid modular design - largest shippable footprint to contain large equipment and piping, modules mated up with a large free standing distillation column.  Layout - ensuring all equipment and instruments are accessible and maintainable within the modules.  Minimize site interruption and production downtime during installation and commissioning of new system. An azeotrope refers to when a mixture boils at constant temperature without a change in composition. In this case, the azeotrope did not need to be exceeded so conventional distillation could be used. However, because of the converging nature of the vapor-liquid equilibrium curve or “pinch,” activity coefficients needed to be carefully selected so that an accurate number of required theoretical stages was predicted and the equipment could be designed properly.
  5. 5. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 5 Simplified Flowsheet Water & Solids Stripper Column Solvent Recovery Feed Feed Interchangers Recovered Solvent Blended Solvent
  6. 6. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 6 The Solution KMPS was awarded this job from a repeat customer due to a successful previous project. The client had recently acquired a new plant-site and was in the process of expanding its manufacturing operations due to increased product demand. The existing equipment was bottlenecking the process and was also at the end of its operational lifespan. Due to these considerations, the new system had to be delivered, installed and commissioned on an expedited schedule with minimal site-interruption and production downtime. During the front end engineering phase, KMPS took the client provided project specifications and modeled the process with proprietary simulation software. Because the solvent mixture was non-ideal and azeotropic, special care was taken in the selection of vapor-liquid equilibrium data. KMPS used a value engineering approach and developed a multi-step distillation system that resulted in lower energy consumption than the existing process due to incorporation of a multi-effect distillation sequence and extensive heat integration. The general concept was discussed and reviewed with the client in detail, along with the Process Performance Guarantee that KMPS typically provides. To address corrosion concerns due to salts in the feed, KMPS proposed using duplex stainless steel equipment and piping specifications for the front end of the process. In order to eliminate the potential for fouling, proprietary column internals were used in the first distillation column along with special considerations in the reboiler design.
  7. 7. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 7 The Solution – Cont’d After the conceptual design and a proposal for the remainder of scope was accepted by the client, KMPS started detailed engineering and procurement. PFD’s & P&ID’s were developed and module design and piping layout began using 3D modeling software. Fabricated equipment was designed and purchased, and instruments were specified. KMPS participated in a client led HAZOP review, and then invited the client to participate in a 3D piping review that uses special software to simulate a walk- through of the modules. This process insured that sufficient access was provided and every component was accounted for. While the modules were being assembled, KMPS provided the client with information to prepare the jobsite for delivery. KMPS supplied foundation loads, anchor bolt patterns, piping tie-in coordinates, and electrical drawings. Since the customer opted to utilize their existing control system, KMPS provided guidance in the form of a Controls Functional Description. In short, the client received all the information necessary to perform site preparations while the modules were being assembled, and KMPS supported this effort as necessary. Performing these site activities ahead of module delivery greatly streamlined and shortened the installation process.
  8. 8. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 8 The Solution – Cont’d The finalized design included the following:  Three process modules (each approx. 11’ x 14’ x 80’) & one stair tower o (1) Distillation column (66” ID x 55’ T/T in-module) o (13) Shell and tube heat exchangers o (6) Centrifugal pumps o (3) Vessels/drums  Free standing distillation column with operating platforms (87” ID x 78’ T/T)
  9. 9. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 9 The Solution – Cont’d KMPS shipped the entire project by truck to the job site after the modules had been assembled. Before the units shipped, a complete Factory Acceptance Test (FAT) was conducted, insuring that the system was ready for operation. After installation was complete, KMPS provided commissioning and startup services which included operator training and a Performance Test.
  10. 10. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 10 Impact  KMPS designed, built, and delivered a new modular solvent recovery system under an expedited schedule in order to meet market demand. The new system was more energy efficient that the current operation and was designed for 40% more capacity.  Modular fabrication allowed the new process plant to be fabricated off-site while the client performed field installation efforts, drastically reducing project timeline and man-power requirements.  Modular fabrication also allowed production to continue operations without interruption while the new distillation system was being fabricated.
  11. 11. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 11 Why Modular from KMPS? KMPS used a value engineering approach during the front end engineering phase to save the client time and money, and also provided a Process Performance Guarantee to eliminate the risk of non-performance. Our modular fabrication approach to process systems has many advantages, the main points of which are highlighted below. To learn specifically how modular fabrication achieves these benefits, please visit our website: www.modularprocess.com  Shorter schedule / faster time to market  Lower cost / lump sum bid / single source  Minimal plant site interruption / improved safety
  12. 12. M O D U L A R P R O C E S S S Y S T E M S | D I S T I L L A T I O N | L I Q U I D E X T R A C T I O N | E N G I N E E R I N G | P I L O T T E S T I N G Telephone: (201) 267-8670 www.modularprocess.com 12 KMPS Products & Services Customer Inquiry Data Startup Assistance and Training Process Development (In Collaboration with Client’s Engineers and Scientists) Material Balance, PFD’s, Unit Operation Selection, Process Simulation Process Design Equipment Design, P&ID’s, Equipment General Arrangement Detailed Engineering Equipment, Piping, Structural, Electrical, Instrumentation & Controls Construction Modular System Specialists in Process Design and Construction of Modular Mass Transfer Systems for the Chemical Processing Industry. Pilot Plant Testing (If Required) 4
  13. 13. 13 Case Study: Modular Distillation System to Recover Spent Solvents Bill Morrocco | Process Engineering Manager www.linkedin.com/in/williammorrocco Bill Morrocco has over 20 years of experience in design and start-up of distillation processes and has a BS in Chemical Engineering from Rensselaer Polytechnic Institute.

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