PROPYLENE STORAGE SYSTEM

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Types of storage

High pressure Medium pressure Low pressure

Bullet Sphere

Low press tank

• DOME ROOF TANK

Atm tank

• Floating roof

• Cone roof

• IFR Tank

Safety is our first priority.

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Requirement of different storageDepending upon the vapor pressure of the

liquid at atmospheric temp different types of storage is required.

If vapor pr is >1kg/cm² liquid is to be stored in sphere or bullet.(Operating pressure).

If 0.5 kg/cm² < vapor pr <1kg/cm² liquid is to be stored in doom roof tank.

If vapor pr <0.5 kg/cm² liquid is to be stored in atmospheric tank.

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Floating roof Internal Floating roof

N2PCV

Internal Floating roof with N2 blanketing

PT

PIC

N2

FY

VRV

PSV

DOME ROOF TANK

Different Type Of Tanks

PURPOSE AND USE

LDPE USERS OF LIQUID C3H6:It has a high coefficient of expansion in its liquid phase, the bullets are never completely filled with liquid (tanks are filled to approximately 85% of their capacity.

At room temperature and atmospheric pressure, propylene is a gas. As pressure increases, boiling point increases.

Purpose: To provide an Overall design basis package which outlines the minimum requirements for storage.

As a modifier and injected into the inlet to the Secondary compressor (C-150).

As a solvent for the peroxide initiator for Tubular reactor process. As a propylene refrigeration systems and received de-inventoried

liquid propylene from the refrigeration systems.

1. Ethylene liquefaction system2. Ethylene storage tank boil-off condenser system

With safety, we win

Propylene Liquid:Liquid density (1.013 bar at boiling point) : 613.9 kg/m3 Liquid/gas equivalent (1.013 bar and 15 °C (59 °F)) : 388 vol/vol Boiling point (1.013 bar) : -47.8 °C Latent heat of vaporization (1.013 bar at boiling point) : 437.94 kJ/kg Vapor pressure (at 20 °C or 68 °F) : 10.3 bar.

Critical point:Critical temperature  : 91 °C Critical pressure  : 46.1 bar.Propylene Gas:Gaseous phaseGas density (1.013 bar at boiling point) : 2.365 kg/m3 Gas density (1.013 bar and 15 °C (59 °F)) : 1.81 kg/m3 Compressibility Factor (Z) (1.013 bar and 15 °C (59 °F)) : 0.984 Specific gravity (air = 1) (1.013 bar and 21 °C (70 °F)) : 1.476

SCOPE OF DESIGN

Battery limits interface block & bleed provided.

Propylene filter.

Pressurized, bullet-type storage drum. The drum complete

insulation (for)

condensation control.

The drum have provisions to be de-inventoried with consideration

given to auto-refrigeration of system.

Propylene pump. Propylene vaporizer.

Dry flare connected line system.

Pressure and flow controls to supply propylene as required to

downstream users.Your work and safety can not be separated.

SIZE AND SPECIFICATION

Propylene grade – LD713.

Polymer production rate: 30.9 T/hr.

Propylene consumption rate: (5.2 kg/T of polymer) 160.7 kg/hr.

The propylene storage drum is a pressurized-type storage bullet.

Total capacity of drum is 208.15 m3

Safety is the first gate to success.

PROPYLENE MSDS

Specific gravity…………………… 0.52 at 15.5°c Boiling point …………………….. -47.7°c Freezing point ………………….. -185°c Auto Ignition temperature .. 457.7°c Flash Point ……………………….. -107.7°c L E L …….……… ………………. 2.0% U E L …….. ……….. ………….. 11.1%4 Health - 1

Fire - 4 Reactivity - 1 Other information.

EQUIPMENTS

Propylene Filter (F-3301)

Propylene storage Drum (D-3301)

Propylene vaporizer (E-3301)

Propylene Pump (P-3301)

Follow the procedures, keep safety in mind

PROCESS DESCRIPTION1. At an ambient flowing temp. of 20°c, propylene has a vapor pressure of about

10.1 barg,. Ambient conditions can vary from 0°c to 50°c, corresponding to vapor pressures from 5.8 to 20.6 barg, respectively.

2. Propylene storage tank receives makeup liquid C3H6 from pipeline supply.

Pressure must be maintained higher than C3H6 vapor pressure to ensure liquid

flow.

3. C3H6 from the pipeline passes through a double block and bleed arrangement

at battery limits and passes through metering system followed by filter.

4. C3H6 enters the top of the propylene storage drum.

5. From the C3H6 storage Drum, propylene pump pumps propylene to

downstream EVA process users: as a modifier to modifiers pump (P-200A/B), as solvent to the initiator Mix Drum (D-301).

6. The propylene storage drum also serves to provide de-inventorying capacity for the ethylene storage propylene refrigeration units. The refrigeration units will be de-inventoried by flowing condensed propylene to propylene storage drum. To recharge the Refrigeration units, vapor propylene will be sent from the propylene storage drum to the suction-side of the compressor.

INSTRUMENTATION AND CONTROL

Propylene flow meter (Coriolis) for high accuracy.

Storage drum high density material, safety instrument system

(sis).

Transfer pump have local start/stop controls as well as remote

start/stop via plant DCS.

Transfer pump will be tripped at low-low level of drum.

Storage system provided Fire & Gas detection and fire protection

system.

Start Early-Drive slowly-Reach safely

PROPYLENE STORAGE B/L PV-002 HV-002 F-3301

To dry flare

PSV-001A/B

LV-002

To dry flare De-inventoried C3H6

PV-001

PV-003A

L.P steam

16-E-3301 HV-001

PV-003B LV-003 16-P-3301 5 Ethylene off gas

liqification package

3. C3H6 accumulator

2. Modifier Pump

4. Ethylene liqufi pack

1. Initiator Mix Drum

D-3301

Level calculation: P=density*g*H. P= Pressure differnece top(vapour) and bottm(liquid).Density=density of liquidg= gravitational constant(=9.81 m/sq sec.)H= In terms of level.

Remember unprepared means unsafe.

SUNDYNE PUMP(P-3301)

CHARACTERISTIC FEATURES OF SUNDYNE PUMPS

•DEVELOPS HIGH HEAD

•LOW FLOW

•VERY SENSITIVE TO CHANGE IN NPSH (R)

•VERTICAL MOUNTED PUMPS

(LMV-LINE MOUNTED VERTICAL)

•USES OPEN RADIAL VANE IMPELLER .

•HIGH SPEED

•USES A INDUCER TO IMPROVE THE NPSH AVAILABILITY AT THE EYE OF THE IMPELLER

•P-3301:Design=85/-45deg c, Pre=38bar,Flow= 8.8cum/hr.

Any Questions?

THANK YOU