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RadiometricLevel Measurementin Coke Chambers
Process Control
2
Conditions in the coke chamber
Diameter of Coker approx 7m, height approx 20m
Temperature up to 430 degrees Celsius
Pressure up to 22 bar during cracking process and up to 300 bar water jet during dicharging process
Critical product properties of residues
Extraordinary mechanical strain during discharging process
Process Control
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Requirement on Level Measurement
Non contact measurement system
Reliable measurement system
Safe measurement system
Proven measurement system
Radiometric Level Measurement from Berthold Technologies is the solution
Process Control
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Process in the Coke Chamber
Hot residual is filled from the bottom
Coker is heated up to 430 degrees Celsius
Pressure drops from 22 bar to 4 bar
Heavy fuels are separated into low and high boiling components
Light components are drained off via a nozzle on the top
Process Control
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Process Requirement
Fast filling cycle of the Coker required for economical reasons
Filling process is restricted by foam formation
Optimization of filling and discharging process in coke chamber
Process Control
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Process Optimization
Optimization of filling and discharging process by continuous level measurement
Control of foam level by controlled injection of anti-foam agent
Additional safety feature by max level switch
Process Control
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Measuring Tasks
Continuous Level Measurement
Measurement of the total level coke/oil/foam-content with radiometric measurement system
Indirect measurement of the foam level by observing and analysing rising speed of the level
Detection of Maximum Level
Radiometric level switch below process gas stub pipe
Process Control
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Level in
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The Filling Process Start of continuous level measurement
Process Control
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The Filling Process Foam level rises
Process Control
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The Filling Process Anti foam agent is added
Process Control
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The Filling Process Continuous level measurement
Process Control
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The Filling Process Foam level rises
Process Control
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The Filling Process Anti foam agent is added
Process Control
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The Filling Process Continuous level measurement
Process Control
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The Filling Process Foam level rises
Process Control
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The Filling Process Anti foam agent is added
Process Control
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The Filling Process Continuous level measurement
Process Control
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The Filling Process Foam level rises
Process Control
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The Filling Process Anti foam agent is added
Process Control
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The Filling Process Continuous level measurement
Process Control
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The Filling Process Foam level rises
Process Control
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The Filling Process Anti foam agent is added
Process Control
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The Filling Process Continuous level measurement
Process Control
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The Filling Process Foam level rises
Process Control
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The Filling Process Anti foam agent is added
Process Control
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The Filling Process Continuous level measurement
Process Control
27
Measurement System for Level Measurement in Coke Chamber
Continuous level measurement
LB 440 control unit master and slave
Rod detectors LB4405 in cascade
Point source in shielding Typ 100/150/200
Level Switch
LB 441 control unit
Point source in shielding LB7440/7442/7444
Process Control
28
Benefits
Filling and discharging process can be optimized by continuous level measurement
Safes money and time
Indirect determination of foam level is possible
Injection of anti-foam agent can be controlled, safes money
Overflow detection by max level switch
Safety of process
Recommended