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Questions and Answers
What is the primary function of the hairpin heat exchanger E-320?
To heat the product stream consisting of NAO and residual catalyst using 60 psig steam.
How does a static mixer, like M-320, operate without moving parts?
It uses internal elements to continuously mix fluid materials through fixed geometries.
What is the purpose of the D-320 Catalyzed Mixing Vessel?
To provide residence time for the nickel-based catalytic reaction in the product stream.
What cooling mechanism is used in the E-321 Catalyzed Product Cooler?
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What is the function of D-321 Catalyst Blend Drum?
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What is the purpose of the M-321 Blend Drum Mixer?
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How are the P-321A/B pumps powered?
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What is the size of the D-322 Catalyst Drum?
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When should the D-322 Catalyst Drum be refilled?
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Where does the 0.2% nickel catalyst enter and exit the D-322 drum?
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Study Notes
Hairpin Heat Exchanger (E-320)
- Designed as a U-shaped pipe within a pipe, ideal for compact spaces and reducing thermal shock risks.
- Functions in a counter-current flow, allowing hot and cold fluids to exchange heat effectively.
- E-320 heats a product stream containing NAO and residual catalyst on the tube side, using 60 psig steam on the shell side.
Static Mixer (M-320)
- A continuous mixing device for fluid materials, operates without moving parts.
- Suitable for various fluids, including liquid mixing and gas dispersion.
- M-320 features a 28" long and 6" diameter schedule 80 pipe with four internal elements for mixing 0.2% nickel catalyst.
- Comes with a spare mixer designed with internal baffles.
Catalyzed Mixing Vessel (D-320)
- Dimensions of 5 feet in diameter and 24 feet in length, designed to allow residence time for nickel-based catalytic reactions.
- Nickel catalyst mixed with the product stream enters from the side bottom, with the converted stream exiting from the top.
Catalyzed Product Cooler (E-321)
- Employs a double-pipe heat exchanger setup, cooling the converted product stream on the tube side with cooling water on the shell side.
Catalyst Blend Drum (D-321)
- Measures 5 feet in diameter and 6 feet in length, used to dilute a 2% nickel catalyst down to 0.2% with C14.
- The drum allows for storage and supply of the diluted catalyst, with a 1” fill line for catalyst input and nitrogen entering from the top.
Blend Drum Mixer (M-321)
- Incorporated for blending the 2% nickel catalyst with C14, achieving a final dilution of 0.2%.
Catalyst Solution Injection Pumps (P-321A/B)
- Positive displacement pumps designed to transfer the 0.2% nickel catalyst from either D-321 or D-322 to M-320.
- Driven by 0.25 HP, 1750 RPM induction electric motors, ensuring consistent operation.
Catalyst Drum (D-322)
- Smaller in size (3 feet in diameter and 4 feet long), serves as a backup supply for the 0.2% nickel catalyst.
- Equipped for refilling after each blending cycle, with catalyst entering and exiting from the bottom and nitrogen entry from the top.
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Description
This quiz explores the design and functionality of hairpin heat exchangers, focusing on their unique 'U-shape' structure and applications. It discusses the implications of using this design in limited spaces and the benefits of counter-current flow between the two fluids. Test your knowledge on how these exchangers operate and their advantages in preventing thermal shock.
