MOTTCORP _ Application Briefs _ Fiber Filters PE,PP

5/26/2018 MOTTCORP _ Application Briefs _ Fiber Filters PE,PP

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Metal Fiber Filters in thePE/PP Polymerization Process

Description:

Automatic cleanable sintered metal fiber

filters offer an economical solution. The

development of metal fiber filter media

such as Bekipor contributes to an

increased quality level through a

long on-stream life resulting in lesshazardous maintenance.

This long on-stream life is accomplished

by surface filtration with a high-porosity

filtration media. The surface filtration is

achieved by using a thin top layer of very

fine fibers. All particles are kept outside

the media forming a cake on the top

layer of the surface. This dust cake can

easily be removed by frequent jet-pulsing.

The metal fiber filter has a high porosity (up to

85%) offering a uniform distribution of blowback

gas during jet pulse. In addition, the energy of the jet pulse is not lost

inside the media resulting in an excellent cleaning system.

Due to the depth structure of the currently used fabric filters, reactivecatalyst particles are trapped inside resulting in rapid polymerization

and clogging of the filter media. Surface filtration with sintered metal

fibers and high, frequent cleaning by jet pulse can avoid this problem.

BEKIFLOW HG

Bekiflow and Bekipor are registered trademarks of N.V. Bekaert S.A.


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hydrocarbon recycleF2

F1 catalysthopper

LoopReactor

FlashSeparator

Purge Column

hydrocarbondiluent

monomer

cyclone

To diluentrecovery

Polymer toextruder

F1: On-catalyst systemF2: After flash gas separator

Benefits: Automatic cleaning system Less hazardous maintenance Long on-stream life No clogging = no polymerization inside

Purpose: On-catalyst activation reactor preceding

the slurry loop process Protection of downstream equipment Recuperation of product

purgegas

product

purgebin

F2

F1

Gas

Phase

Reactor

catalysthopper

cyclone

F3

heat exchanger

F4

gas feed

F1: On-catalyst transport systemF2: Low-pressure degassing filterdownstream gas-phase reactor

F3: Purge bin filterF4: In-depth filter to protect

downstream equipment

recycle gas


Purpose: Protection of downstream equipment Recuperation of product On-pneumatic transport system

SINGLE GAS PHASE FLUIDIZED BED PROCESS

SLURRY LOOP PROCESS


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HYBRID PROCESS: SLURRY LOOP + GAS PHASE FLUIDIZED BED REACTORS

MULTI-ZONE CIRCULATING TECHNOLOGY

F2

F1catalysthopper

LoopReactor

FlashSeparatorhydrocarbon

diluent

monomer

cyclone

F3

F4

F5

fresh feed

heat

exchanger

purgegas

product

recycle gas

2H

GasPhase

Reactorpurgebin


Purpose: Protection of downstream equipment: F5, F2 Purge bin filter: F4 Vent on-catalyst transport system: F1 Recuperation of product: F3 low-pressure

degassing filter and F2

heatexchanger

heatexchanger

catalyst

fresh monomerfeed

productdischarge

recycle gas


Purpose: Recuperation of product:

high-pressure degassing filter


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SURFACE FILTRATION: ON-LINE CLEANED THROUGH BACK PULSE

Dust

LoadedGas

CleanGas

Cake build-up

Filtration Cycle

Back pulse

Cleaning Cycle

DustCake

Pressurized

CleaningGas

Filter Filtration layer = layer of

very fine fibers Support layer = layer of very

coarse fibers, to distribute

uniformly the blowbackgas during jet-pulse

PSFIBERPE-PP Rev 0 0803 1.5

ISO 9001 CERTIFIED

For more information:

Mott Corporation84 Spring LaneFarmington, CT 06032-3159

Tel: 860-747-6333 or 800-289-6688Fax: 860-747-6739E-mail: [email protected]

www.mottcorp.com

mottcorporationTh ink o f the poss ib i l i t i e s

MOTTCORP _ Application Briefs _ Fiber Filters PE,PP

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