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Questions and Answers
What is the primary purpose of the first four tubes in the R-201-205 reactors?
To preheat the ethylene feed before catalyst injection.
What are the potential consequences of catalyst propagating into the relief valve riser piping?
It can lead to overheating and catalytic decomposition, causing catastrophic piping failure.
Describe the pump type used in P-201-205 for catalyst injection.
They are axial position variable volume positive displacement piston pumps.
How does the volume produced by the axial piston pump vary?
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What is the operation mode of the P-200 catalyst pump typically set to?
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What is the purpose of placing the HOA switch in hand for the catalyst pump?
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How do you increase the pump stroke of the P-200 Catalyst Pump?
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What is the function of the E-201-205 Reactor Effluent Coolers?
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What is coalescing in the context of CS-202 coalescers?
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What is the purpose of the FI-202 pre-filters on ethylene purge lines?
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What is the role of steam production in the R-201-205 reactors?
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What is the composition of the dilute catalyst injected by the P-201-205 pumps?
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How does the hydraulic pumping system of the P-201-205 pumps assist with the catalyst injection process?
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Why is it critical that reactors are not operated without PSV purge flows?
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What mechanism is used in the P-200 catalyst pump to control its operation?
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What is the role of the Variable Frequency Drive (VFD) in controlling the P-200 Catalyst Pump?
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Describe how the pump stroke can affect catalyst flow to the reactor.
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What are the cooling mechanisms employed by the E-201-205 Reactor Effluent Coolers?
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How does mechanical coalescing function in CS-202 coalescers?
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Why are FI-202 pre-filters essential on ethylene purge lines?
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Study Notes
R-201-205 Reactors
- Horizontal multi-tube reactors consisting of 216 tubes, initiating ethylene feed preheating in the first four tubes.
- Catalyst injection happens in the fifth tube, while conversion occurs in the remaining 211 tubes producing even-carbon normal alpha olefins.
- The process is exothermic, managing heat through steam production.
- Operating without PSV purge flows is dangerous, risking equipment, personnel safety, and environmental impact.
- Catalyst presence in the relief valve riser can lead to heat buildup and possible catastrophic failures.
P-201-205 Catalyst Pumps
- Axial position variable volume positive displacement piston pumps powered by 40 HP motors, designed to deliver a dilute catalyst (5 wt% TEA) to reactors.
- Reciprocating piston type with horizontally opposed plungers, supported by a rigid housing to minimize side loading and thrust on seals.
- The hydraulic pump features a rotating cylinder with pistons, with output volume determined by swashplate position.
P-200 Catalyst Pump
- Bran+Luebbe diaphragm pump featuring a Hand, Off, Automatic (HOA) switch for motor control.
- Generally operated in automatic mode, initiated by a START button, followed by speed adjustments through FC-2104.
- Displays operation status via DCS indicator when 5% output is reached; has adjustable pump stroke and Variable Frequency Drive (VFD) to regulate flow.
- Stroke adjustments are made by turning a handwheel, with 0 mm indicating no flow and 120 mm representing full capacity.
E-201-205 Reactor Effluent Coolers
- Multi-tube U-type exchangers cool reactor effluent using cooling water to prevent undesirable reactions immediately after the reactors.
CS-202-1,2,3,4,5 Coalescers
- Devices that separate emulsions (liquid/liquid, vapor/liquid) using mechanical means, often with stainless mesh or filter elements.
- Effective in removing water from hydrocarbons and liquid hydrocarbons from gas streams.
- Installed on ethylene purge lines to each reactor to eliminate residual compressor oil.
FI-202-1,2,3,4,5 Pre-filters
- Located on the ethylene purge lines to each reactor, aimed at removing contaminants from the system.
R-201-205 Reactors
- Horizontal multi-tube reactors consisting of 216 tubes, initiating ethylene feed preheating in the first four tubes.
- Catalyst injection happens in the fifth tube, while conversion occurs in the remaining 211 tubes producing even-carbon normal alpha olefins.
- The process is exothermic, managing heat through steam production.
- Operating without PSV purge flows is dangerous, risking equipment, personnel safety, and environmental impact.
- Catalyst presence in the relief valve riser can lead to heat buildup and possible catastrophic failures.
P-201-205 Catalyst Pumps
- Axial position variable volume positive displacement piston pumps powered by 40 HP motors, designed to deliver a dilute catalyst (5 wt% TEA) to reactors.
- Reciprocating piston type with horizontally opposed plungers, supported by a rigid housing to minimize side loading and thrust on seals.
- The hydraulic pump features a rotating cylinder with pistons, with output volume determined by swashplate position.
P-200 Catalyst Pump
- Bran+Luebbe diaphragm pump featuring a Hand, Off, Automatic (HOA) switch for motor control.
- Generally operated in automatic mode, initiated by a START button, followed by speed adjustments through FC-2104.
- Displays operation status via DCS indicator when 5% output is reached; has adjustable pump stroke and Variable Frequency Drive (VFD) to regulate flow.
- Stroke adjustments are made by turning a handwheel, with 0 mm indicating no flow and 120 mm representing full capacity.
E-201-205 Reactor Effluent Coolers
- Multi-tube U-type exchangers cool reactor effluent using cooling water to prevent undesirable reactions immediately after the reactors.
CS-202-1,2,3,4,5 Coalescers
- Devices that separate emulsions (liquid/liquid, vapor/liquid) using mechanical means, often with stainless mesh or filter elements.
- Effective in removing water from hydrocarbons and liquid hydrocarbons from gas streams.
- Installed on ethylene purge lines to each reactor to eliminate residual compressor oil.
FI-202-1,2,3,4,5 Pre-filters
- Located on the ethylene purge lines to each reactor, aimed at removing contaminants from the system.
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Description
This quiz covers the principles and operations of R-201-205 reactors and P-201-205 catalyst pumps used in chemical engineering. Participants will explore the specifics of reactor design, catalyst injection, and the importance of safety protocols. Improve your understanding of reactor and pump mechanics in industrial applications.
