HD Tipica Tamices Moleculares
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0 PARA DISEO ERA ERA/RC GVR/RG
B PARA APROBACIN 30/06/2011 ER RG LR/RG
A PARA COMENTARIOS 11/05/2011 ER/SC ERA/RC GVR/RG
REV. DENOMINACIN FECHA REALIZ REVIS APROB
OBM3285
ESTE DOCUMENTO CONTIENE INFORMACIN PROPIEDAD DE AESA E YPFB, SU REPRODUCCIN TOTAL O PARCIAL ESTA PROHIBIDA.
PROYECTO
PLANTA DE SEPARACIN
DE LQUIDOS RIO GRANDE REALIZ REVIS APROB TTULO
INICIAL ER RC GVR/RG ESPECIFICACIN TCNICA
TAMICES MOLECULARES PARA V-501 A/B/C FECHA 29/06/2011 29/06/2011 29/06/2011
FIRMA
DOC. AESA N 3285-A210-633-3710-DD-001 PGINAS VERSIN
1 DE 15
1
GUARDADO WORD 97 - 2003 NO MODIFICAR MANUALMENTE
REVISIN
0
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 2 de 15 1 0
NDICE
1. PURPOSE ............................................................................................................................. 3
2. SCOPE .................................................................................................................................. 3
3. INTRODUCTION ................................................................................................................... 3
4. DESIGN CONSIDERATIONS ............................................................................................... 3
5. SCOPE OF SUPPLY ............................................................................................................ 4
6. SITE CONDITIONS ............................................................................................................... 4
7. INLET CONDITIONS ............................................................................................................ 5
8. DESIGN CONDITIONS ......................................................................................................... 6
9. PACKING, STORAGE AND HANDLING ............................................................................. 6
10. START UP ............................................................................................................................ 6
11. INFORMATION TO BE PROVIDED BY VENDOR ............................................................... 7
12. ANNEXES ............................................................................................................................. 8
12.1. PROCESS FLOW DIAGRAM 3285-A100-632-2024-DW-001, ENTRADA A PLANTA Y DESHIDRATACIN, REV. B1 ........................................................................................................ 9
12.3. MECHANICAL DATA SHEET 3285-A210-633-3120-DS-001, DESHIDRATADORES DE GAS V-501 A/B/C, REV. 01 ........................................................................................................... 10
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 3 de 15 1 0
1. PURPOSE
Provide vendor with Molecular Sieve Dehydration System design parameters for the Planta de Separacin de Lquidos Ro Grande in order to purchase the molecular sieves for Dehydrators V-501 A/B/C.
2. SCOPE
This document defines all site, operating and design conditions required for the Molecular Sieve Dehydration System design.
3. INTRODUCTION
AESA has been awarded YPFBs Planta de Separacin de Lquidos Ro Grande, a 200 MMSCFD LPG Gas Plant to be constructed in Santa Cruz de la Sierra, Bolivia.
This plant will process 200 MMSCFD of natural gas coming from an upstream dew point plant with a water content of 5.92 lb/MMSCF. Dehydrated gas water content should not exceed 0.1 ppmv.
Dehydration system comprises three dehydration columns V-501 A/B/C, two absorbing and one regenerating. Adsorption cycles will last 24 hours while regeneration cycle (heating, cooling and stand by), 12 hours.
Downstream the solids separation filter, a regeneration stream will be derived. This gas stream will be compressed and heated prior to entering regenerating dehydrators. After desorbing water from molecular sieves this wet gas will be cooled down in an air cooler and water will be condensed and separated. Regeneration gas will be reinjected into the main stream before the inlet filter. Refer to Process Flow Diagram in Annex I.
A preliminary design was issued during basic engineering. This design considered 79 ID, 16 8 height vessels filled with 1/2 top support balls, a silica gel layer, a 4 x 8 and 8 x 12 3 molecular sieve mesh and 1/8 middle and 1/4 bottom support balls. See V-501 A/B/C Dehydrators Data Sheet in Annex II. Vendor should confirm this design or provide an alternative one.
4. DESIGN CONSIDERATIONS
Dehydration system will consist of three columns: two in adsorption and one in regeneration. Adsorption cycle will last 24 hours while regeneration cycle, 12 hours. Regeneration cycle includes heating, cooling and stand by.
Dehydrator inlet gas flow rate should include regeneration gas (regeneration gas is cooled and recycled to plant inlet, upstream the inlet filter).
Dehydrators inlet gas water content should consider both water content of plant inlet gas and water content of regeneration gas.
Flow rate operation range is between 70% and 110% of design flow.
Adsorbing dehydrators should operate in parallel processing 50% of the flow each.
Regeneration gas will be heated in a fired heater.
Regeneration duty should not exceed 5.04 MMBtu/h.
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 4 de 15 1 0
Regeneration gas preferred temperature is 480 F.
5. SCOPE OF SUPPLY
Following scope could be changed in order to meet Vendors system redesign.
Vendor should provide the following materials for a three column dehydration system.
4 x 8 Mol Sieve Mesh Beds
8 x 12 Mol Sieve Mesh Beds
Support Balls, 1/2
Support Balls, 1/4
Support Balls, 1/8
Silica Gel Layer
Vendor should indicate approximate weights and dimensions of product packages.
Vendor should guarantee maximum dehydrated gas water content of 0.1 ppmv.
6. SITE CONDITIONS
Table N1 Site Conditions
Ambient Temperature Maximum 104 F Average 91 F Minimum 53.6 F
Barometric Pressure - 14.2 psia
Rain Fall Daily Maximum (Summer) by YPFB Annual average 51 in/year
Relative Humidity January May 89 % June August 60 % August December 75 %
Wind
Predominant speed 59 ft/s Predominant direction N a SE Maximum speed 82 ft/s Design speed 100 ft/s
Seismic Zone Zone 1 (according to Argentinean Code CIRSOC 103) Altitude 1118,77 ft a.s.l.
Air Temperature for Design
Air Coolers 104 F Turbines 104 F Electrical Devices and Instrumentation
104 F
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 5 de 15 1 0
7. INLET CONDITIONS
Table N2 Inlet Conditions at Operation Cycle (1)
Property Value
Flow Rate (2) 200 MMSCFD
Mass Flow Rate 410500 lb/h
Temperature 85.5 F
Pressure (3) 806.4 psig
Molecular Weight 18.69
Viscosity 0.013 cP
Density 3.052 lb/ft3
Water Content (4) 5.92 lb/MMSCF
Dehydrated Gas Water Content. Spec. < 0.1 ppmv
(1) Refer to Stream 200 in PFD. Stream conditions are evaluated before mixing with regeneration gas,
(2) Flow rate represents total flow. Regeneration gas should be added and resultant stream divided between two adsorbing beds.
(3) Consider 4 psi pressure drop for Inlet Filter F-501.
(4) Water content from regeneration gas is to be added.
Table N3 Inlet Gas Composition at Operation Cycle
Component Molar Fraction
Methane 0.878873
Ethane 0.062994
Propane 0.022352
i-Butane 0.003844
n-Butane 0.004984
i-Pentane 0.001458
n-Pentane 0.000901
n-Hexane+ 0.000867
Nitrogen 0.005673
CO2 0.017929
H2O 0.000125
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
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Table N4 Regeneration Conditions
Property Value
Regeneration Fluid Dehydrated Gas
Regeneration Temperature (1) 480 F
Pressure 826.4 psig
Heater Capacity (1) 5.04 MMBtu/h
Minimum Aircooler Gas Outlet Temperature 120.2 F
Cooling Gas Temperature 96 F
(1) To be confirmed by vendor.
8. DESIGN CONDITIONS
Design Pressure:1150 psig
Design Temperature (Min / Max):54 / 510F
9. PACKING, STORAGE AND HANDLING
In order to ease dehydrators loading, molecular sieves are preferred to be shipped in sacks above steel drums.
Vendor should indicate maximum allowable outdoor and indoor storage periods for product not to require regeneration prior to start up. Vendor should also indicate maximum storage periods and conditions in which product quality is preserved and guaranteed.
10. START UP
In case regeneration prior to start up is required, vendor should confirm if current feed gas heated to 480 F is enough to meet the necessary dehydrated molecular sieves water content for proper operation.
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
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11. INFORMATION TO BE PROVIDED BY VENDOR
Vendor should provide, at least, the following information:
Table N5 Molecular Sieve Parameters
Property Value
Chemical formula
Shape
Particle diameter, m
Mesh size
Bulk density, lb/ft3
Pore diameter, m
Crushing strength
Heat of adsorption, Btu/lb
Equilibrium water capacity, lbH2O/lb bed
Water content (as shipped), lbH2O/lb bed
Adsorption pressure drop (psi)
Regeneration pressure drop (psi)
Minimum regeneration gas flow required to avoid channeling, MMSCFD
Minimum required cooling time, h
Average time for bed change, months
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 8 de 15 1 0
12. ANNEXES
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
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12.1. PROCESS FLOW DIAGRAM 3285-A100-632-2024-DW-001, ENTRADA A PLANTA Y DESHIDRATACIN, REV. B1
12.2.
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
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12.3. MECHANICAL DATA SHEET 3285-A210-633-3120-DS-001, DESHIDRATADORES DE GAS V-501 A/B/C, REV. 01
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 11 de 15 1 0
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 12 de 15 1 0
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 13 de 15 1 0
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 14 de 15 1 0
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PROYECTO: AESA N 3285-A210-633-3710-DD-001
OBM3285
PLANTA DE SEPARACIN DE LQUIDOS RIO GRANDE
TAMICES MOLECULARES PARA V-501 A/B/C
Ver. Rev.
Pgina 15 de 15 1 0