SIZE AND RATE HORIZONTAL 3-PHASE SEPARATORS

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SIZE AND RATE HORIZONTAL 3-PHASE SEPARATORS by Mind Map: SIZE AND RATE HORIZONTAL 3-PHASE SEPARATORS

1. THEORY

1.1. BASED ON UNDERLYING BASIC PHYSIC

1.1.1. GRAVITY!

1.2. LIQUID EMULSION

1.2.1. HEATING IS USED

2. INTRO

2.1. IS A KEY UNIT IN ACHIEVING THE REQUIRED EXPORT SPECIFICATION IN AN OIL AND GAS PROCESS

3. SETUP

3.1. TO UNDERSTAND THE SETUP OF SEPARATOR

3.2. AS AN ENGINEER

3.2.1. AWARE OF THE VESSEL SETTING

3.2.1.1. VESSEL

3.2.1.1.1. LANHH (HIGH LIQUID LEVEL TRIP)

3.2.1.1.2. LAH (HIGH LIQUID LEVEL ALARM)

3.2.1.1.3. NLL (NORMAL LIQUID LEVEL)

3.2.1.1.4. LAL (LOW LIQUID LEVEL ALARM)

3.3. STEPS TO SET-UP

3.3.1. 1. VESSELS

3.3.2. 2. SIZING

3.3.3. 4. RESIDENCE TIMES

3.3.4. 3.VAPOR AREA

3.3.5. 5. WEIR WEIGHT AND POSITION

3.3.6. 6. LIQUID INTERFACE LEVEL

3.3.7. 7. SURGE VOLUME

3.3.8. 8. NOZZLE SIZING

4. SIZING

4.1. CAN BE LONG

4.1.1. L

4.2. CAN BE SHORT

4.3. DIAMETER RATIO

4.3.1. 2/5

5. VAPOUR AREA

5.1. TO ENSURE ADEQUATE VAPOR AREA EXISTS

5.2. FLOWRATES OCCURS IN HORIZONTAL DIRECTIONS

5.2.1. IT MUST BE CALCULATED

5.2.1.1. INTO CONSIDERATION THE LENGTH OF THE VESSEL

5.2.1.2. APPLIES A DE-RATING FACTOR

5.2.1.2.1. TO RELATE THE TERMINAL VELOCITY TO HORIZONTAL FLOW

6. RESIDENCE TIME

6.1. THE TIME THAT LIQUID STAYS IN THE VESSELS

6.2. CONSIDERATION WHEN SPECIFYING RESIDENCE TIME

6.2.1. OIL SETTING TIME

6.2.1.1. TO ALLOW ADEQUATE WATER REMOVAL FROM THE OIL

6.2.2. WATER SETTLING TIME

6.2.2.1. TO ALLOW ADEQUATE OIL REMOVAL FROM THE WATER

6.3. RESIDENCE TIMES FOR LIQUID-LIQUID SEPARATION ARE GENERALLY THE LIMITING FACTOR IN SELECTING LEVEL SETTINGS

7. WEIR HEIGHT AND POSITION

7.1. IMPORTANT CONSIDERATION TO ACHIEVE THE BEST SEPARATION

7.2. PREVENTS WATER FROM ENTERING OIL STREAMS

7.3. WATER LAYER OF AN OIL DROPLET CAN BE CALCULATED

8. LIQUID INTERFACE LEVEL

8.1. WITH WEIR HEIGHT KNOWN HIGH INTERFACE LEVEL CAN BE SET

8.1.1. TYPICALLY 100MM BELOW WEIR

8.2. USING TERMINAL VELOCITIES

8.2.1. THE RISE OF OIL LAYER CAN BE CALCULATED TOO!

9. SURGE VOLUMES

9.1. A PROCESS UPSET USUALLY CAUSED BY A LIQUID SLUG INTO THE VESSEL

10. NOZZLE SIZING

10.1. IT IS IMPORTANT TO PREVENT EXCESSIVE MOMENTUM FROM DISRUPTING SEPARATIOM

10.2. HAVE AT LEAST THE SAME DIAMETER AS THE CONNECTING LINE

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