1. SIZING
1.1. CAN BE LONG
1.1.1. L
1.2. CAN BE SHORT
1.3. DIAMETER RATIO
1.3.1. 2/5
2. VAPOUR AREA
2.1. TO ENSURE ADEQUATE VAPOR AREA EXISTS
2.2. FLOWRATES OCCURS IN HORIZONTAL DIRECTIONS
2.2.1. IT MUST BE CALCULATED
2.2.1.1. INTO CONSIDERATION THE LENGTH OF THE VESSEL
2.2.1.2. APPLIES A DE-RATING FACTOR
2.2.1.2.1. TO RELATE THE TERMINAL VELOCITY TO HORIZONTAL FLOW
3. RESIDENCE TIME
3.1. THE TIME THAT LIQUID STAYS IN THE VESSELS
3.2. CONSIDERATION WHEN SPECIFYING RESIDENCE TIME
3.2.1. OIL SETTING TIME
3.2.1.1. TO ALLOW ADEQUATE WATER REMOVAL FROM THE OIL
3.2.2. WATER SETTLING TIME
3.2.2.1. TO ALLOW ADEQUATE OIL REMOVAL FROM THE WATER
3.3. RESIDENCE TIMES FOR LIQUID-LIQUID SEPARATION ARE GENERALLY THE LIMITING FACTOR IN SELECTING LEVEL SETTINGS
4. WEIR HEIGHT AND POSITION
4.1. IMPORTANT CONSIDERATION TO ACHIEVE THE BEST SEPARATION
4.2. PREVENTS WATER FROM ENTERING OIL STREAMS
4.3. WATER LAYER OF AN OIL DROPLET CAN BE CALCULATED
5. LIQUID INTERFACE LEVEL
5.1. WITH WEIR HEIGHT KNOWN HIGH INTERFACE LEVEL CAN BE SET
5.1.1. TYPICALLY 100MM BELOW WEIR
5.2. USING TERMINAL VELOCITIES
5.2.1. THE RISE OF OIL LAYER CAN BE CALCULATED TOO!
6. SURGE VOLUMES
6.1. A PROCESS UPSET USUALLY CAUSED BY A LIQUID SLUG INTO THE VESSEL
7. NOZZLE SIZING
7.1. IT IS IMPORTANT TO PREVENT EXCESSIVE MOMENTUM FROM DISRUPTING SEPARATIOM
7.2. HAVE AT LEAST THE SAME DIAMETER AS THE CONNECTING LINE
8. THEORY
8.1. BASED ON UNDERLYING BASIC PHYSIC
8.1.1. GRAVITY!
8.2. LIQUID EMULSION
8.2.1. HEATING IS USED
9. INTRO
9.1. IS A KEY UNIT IN ACHIEVING THE REQUIRED EXPORT SPECIFICATION IN AN OIL AND GAS PROCESS
10. SETUP
10.1. TO UNDERSTAND THE SETUP OF SEPARATOR
10.2. AS AN ENGINEER
10.2.1. AWARE OF THE VESSEL SETTING
10.2.1.1. VESSEL
10.2.1.1.1. LANHH (HIGH LIQUID LEVEL TRIP)
10.2.1.1.2. LAH (HIGH LIQUID LEVEL ALARM)
10.2.1.1.3. NLL (NORMAL LIQUID LEVEL)
10.2.1.1.4. LAL (LOW LIQUID LEVEL ALARM)
10.3. STEPS TO SET-UP
10.3.1. 1. VESSELS
10.3.2. 2. SIZING
10.3.3. 4. RESIDENCE TIMES
10.3.4. 3.VAPOR AREA
10.3.5. 5. WEIR WEIGHT AND POSITION
10.3.6. 6. LIQUID INTERFACE LEVEL
10.3.7. 7. SURGE VOLUME
10.3.8. 8. NOZZLE SIZING
11. OPTIMIZATION
11.1. ISSUES WITH SIZING
11.1.1. NUMBER OF CRITERIA THAT MUST BE MET TO ENSURE CORRECT SEPATION
11.1.2. PREVENT OVERSIZING THE VESSEL
11.1.3. VARIABLES SHOULD BE ALTERED
11.1.3.1. DIAMETER
11.1.3.2. LENGTH
11.1.3.3. WEIR POSITION
11.1.3.4. LEVEL SETTING
11.2. ENGINEER USE TOOLS
11.2.1. MSExcel
11.2.1.1. OPTIMISES DIMENSIONS