propane dehydrogenation – continuous catalyst regeneration applications

7/23/2019 Propane Dehydrogenation – Continuous catalyst regeneration applications

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APPLICATION REPORT

2722 / 4 5 / 02

EN • 6 / 2 012

Propane Dehydrogenation –Continuous catalyst regenerationapplications

Process overviewThe propane dehdroenation proce, known a

PDH, i ed to pp pomer-rade propene

from propane to meet the rowin propene

market, independent of a team cracker or FCC

nit. It provide a dedicated, reiabe orce of

propene to ive more contro over propene

feedtock cot. The propane dehdroenation

proce operate at hih temperatre (arond

540°C). Over a period of time, the catat

become coated with coke, a natre bprodct of

the proce, and reqire reeneration. Catat

activit i maintained b contino catat

reenerator, known a CCR, where the catat

i contino withdrawn from the reactor, then

reenerated, and fed back to the reactor bed. A

erie of ock hopper, tpica

for compete ock hopper arranement, are

ed to move catat from the reactor to the

reenerator and eventa back into the reactor.

The contino catat reenerator make it

poibe to manae the hih catat cokin rate to

achieve the contanc of the ied.

Diagram is intended to be representationand not to be viewed as actual process flowdiagram.



2722/45/02 EN PROPANE DEHyDROgENATION –

CONTINuOus CATAlysT REgENERTION APPl ICATIONs

2 APPlICATION REPORT 6/12

Propane dehydrogenation Challenges

The propane dehdroenation proce provide a

dedicated, reiabe, independent orce of hih-

qait propene. A contant non-decinin ied i

important in the PDH economic. The contanc of

the ied i achieved b the CCR ection, which

enre the reactor are contino ppied with

freh reenerated catat, and prodct ied

are maintained at freh catat eve. Catat

handin vave pa an important roe in enrin

proper CCR performance. Reiabe and accrate

contro, on-off and EsD-vave performance i

important for tota proce efcienc.

Health, Safety, Environment – Vave eakin

poe both an environmenta and afet ie

de to rik of re, toxicit and voatiit of ae.

Emerenc htdown and on/off vave mt

be abe to perform their action in a proce or

eqipment faire.

Top-class products at maximum yield – The

market ca for cean prodct and hih qait. It

i important that the proce i tabe, exibe and

nder contro. Proper vave performance in reactor,

reenerator, drer, recover tem improve

the accrac of throhpt contro and advere

affect to the pant performance and ao the

downtream procee.

Maintenance costs – Critica vave in catat

handin ock-hopper, ventin, catat withdrawaand addition pa an extreme important roe

in ccef catat reeneratin proce

performance. Poor performin vave in the

proce mt be erviced becae the wi have a

direct impact on the efcienc of the proce.

Plant run-time – Petrochemica pant are ookin

for oner pant rn-time ince downtime mean

prodction oe and i a remarkabe cot

incdin maintenance cot. Thi reqire reiabe

eqipment and proce contro.

Metso solutions

We are a tned p to anwer thee chaene

throh or appication experience and prodct

offerin for contro, afet and atomated on/

off dt that enre hih vave performance in

propane dehdroenation procee. Or catat

handin vave have proven performance hitor

and are deined for efcient and reiabe proce

operation.

Safety – Meto inteient vave have been

deined to provide market eadin afet. Rotar

tem operation redce fitive emiion and

protect from eakin. Meto i the on ine

orce emerenc htdown vave ppier who

ha the experience and knowede to combine

inteience with mot reiabe vave and actator.

Technoo eection ike rotar tem operation

and inherent re afe dein enre that atet

emiion and re afet tandard can be appied.Reiabe vave with rt inteient, sIl3 approved

afet vave controer and partia troke tetin

device Nee VavgardTM wi enre that pant

emerenc htdown vave wi awa perform

proper when needed.

Efficiency – Throhpt oe and poor contro

performance wi be avoided with hih performance

rotar vave. Fow throh the proce nit ma

be chaned a the need arie with raneabiit

of 150:1 and frther with f bore ba vave. Or

advanced inteient diita vave controer forcontro, on-off and EsD appication enre hih

poitionin accrac and fat repone. Correct

vave eection and izin with or Neprof-proram

we can are the bet vave performance and

proce contro.

Availability – simpe rotar dein, ame face-to-

face dimenion, and oba ervice network and

inventor manaement wi hep o to optimize

or maintenance activitie. Rotar vave have

been in ervice for evera ear withot reqirin

maintenance and how no in of eakae.

The proven performance of Meto vave with

on atin meta eat tihtne and ht-off

capabiitie make them an idea otion for on-off,

contro and critica catat handin appication.

Reliability – Vave performance trend data coected

b or mart vave controer and anazed b

Meto FiedCare, open FDT/DTM technoo

baed conration and condition monitorin

oftware, make it poibe to predict and

repond to maintenance reqirement and redce

ncheded downtime. Thi ive f tranparenc

to the vave performance in proce contro.



PROPANE DEHyDROgENATION – 2722/45/02 EN

CONTINuOus CATAlysT REgENERTION APP lICATIONs

APPlICATION REPORT 6/12 3

Continuous catalyst regenerationapplications

1. The Lock hopper block and vent valves

The sequence of lock hopper function is as

follows:

• Catat reqirin reeneration i athered in

the reactor dienain zone.

• Catat ow i topped b a pecia

emented ba vave ocated immediate

beow the dienain zone and ptream of

the two Nee ock hopper bock vave. The

two vave above the ock hopper are f open

before catat i aowed to ow throh them.

• The emented vave i then opened aowin

catat to ow into the ock hopper.

• When the ock hopper i f the emented

vave i coed. After the ow of catat icompete topped, the two Nee vave are

coed, ioatin the ock hopper.

• The ock hopper i then inerted with nitroen.

Foowin thi, the two ock hopper bock vave

ocated beow the ock hopper are opened

aowin the inerted catat to ow, b ravit,

into a ift enaer for tranport to the next part

of the proce.

• Catat fain from the reactor into the ock

hopper contain a fair are amont ofhdroen. After in, ioatin and inertin

the ock hopper, the ae are vented throh

the ock hopper vent vave. Thi vave mt

vent hih abraive, catat-entrained a

whie imtaneo achievin Ca VI

ht off. A pecia dobe-eated obe vave

previo erved thi appication. Thi dein

had one meta eat, intended to reit abraion

damae imparted b the id, and one oft

eat, intended to achieve the deired ht off

caication. Thi otion ha hitorica been

paed with eakae probem a we a hih

cot of repair.

Metso solution

Valve type – Meto tiize a f-bore dein

in ock hopper ervice. A conter bore and

tranition in diameter are removed from the

waterwa of the vave. Thi cae the vave to

ook ike a piece of mooth pipe to the owin

media in order to eiminate the poibiit of

pverizin expenive catat. It ao minimize

the poibiit of interna vave damae b the

hih abraive catat. The vave bod i

contrcted of A351 CF8M for the onet poibe

ife whie bjected to the extreme therma

tranient aociated with thi proce.

Ball – The ba i contrcted of A351 CF8M with

a Nicke Boron coatin. The bae materia of

the vave wa choen to provide for a coefcient

of expanion imiar to the vave bod. Thi i

reqired to maintain eat to ba tihtne a the

vave experience a are nmber of inicant

therma tranient. The Nicke Boron coatin i

appied to raie the rface hardne of the ba to

Rockwe C68-C70. Thi i necear to provide for

on component ife in thi hih abraive ervice.

Seat – Meto tiize 316ss eat with Chromim

Carbide (CrC) coatin for thi appication. Thi

materia combination wa aain choen for

compatibe coefcient of expanion a we a

perior abraion reitance. The eat enerizer,

perhap the mot important dein featre of thevave, i Meto’ niqe “oid-proof” contrction.

The eat back cavit i compete ed with a

raphite tack. The raphite eat back materia

achieve two important tak: 1) it erve a eat

enerizer.The raphite aow for repeatabe vave

htoff depite the extreme in temperatre. 2) The

raphite tack compete the eat back cavit.

Thi eiminate the poibiit of catat ne

accmatin behind the eat. Thi i extreme

important a catat ne behind the eat can

cae the reqired torqe to increae enoh

to exceed the maximm otpt capabiit of theactator.

Controller – Nee switchgard sg 9000 i an

inteient on-off vave controer that i pecia

deined to meet chaene of proce critica

on-off appication. sg 9000 ive the poibiit

to et the on-off vave trokin time and

proe accordin to the proce need. It hih

pnematic capacit ao ive the poibiit to

reach fat trokin time withot the need for an

additiona acceorie ch a vome booter

or qick exhat vave. In addition, predictive

maintenance can be practied with the hep of the

dianotic that sg 9000 provide on the on-off

vave performance. To impif the intaation,

different mechanica or indctive proximit witche

can be intaed inide the sg 9000 hoin. A

an option for sg 9000, Meto can ao provide

traditiona contro otion baed on eparate

oenoid vave and imit witche.



2722/45/02 EN PROPANE DEHyDROgENATION –

CONTINuOus CATAlysT REgENERTION APPl ICATIONs

4 APPlICATION REPORT 6/12

Valve model example:

XA03DWUUS6SLJBDD

XA F bore eat pported ba vave

03 Vave ize, tpica 2” to 6”

D ANsI ca 300

W ANsI B16.5 raied face ane

uu F compiance with uOP pecication 671

s6 AsTM A351 CF8M / ss316 taine tee

bod contrctionsl ss316/NiBo ba contrction

J soid proof eat contrction

B CrC coatin on eat

D A raphite eat and packin with meta

tem bearin

D B8 td and B8M nt

Benets

Thi demandin appication ed to the ccef

deveopment of Meto otion, the Nee X-MBV

ba vave. The pecia end-to-end dimenion

aow the X-MBV to retrot in pace of a obe

vave withot pipin modication. The Nee

J tpe oid proof eat prevent catat dt

from ettin behind the ba. Thi precde the

poibiit of torqe increae or eat back cavit

abraion damae. The materia of contrction

are eected for maximm reitance to abraion

damae aowin for on vave ife. The Nee

X-MBV ba vave ha been pecica deined

to meet the proce reqirement, ch a uOP

pecication 671. Eqipped with Meto pnematic

cinder actator and Nee switchgard

inteient on-off vave controer, provide the idea

ock hopper bock and vent vave otion.

2. The Catalyst addition and removal valves

The catat addition tem i the point in proce

where new catat i added to repace the qantit

of catat that i withdrawn and dicarded from

the tem after it can no oner be reenerated.

The new catat ow b ravit into the tem

throh a catat addition hopper at ambient

temperatre. The new catat pae throh

the rt addition vave and into the addition ockhopper. The rt vave, above the ock hopper, i

then coed and the econd vave, beow the ock

hopper, i opened admittin the new catat into

the proce.

Valve requirements

• Tiht ht-off

• Catat friend dein

• safet interock tem

Metso solution

The Jamebr 9150 erie oft-eated ba

vave with Xtreme eat and pnematic actator

ha been proved to be the riht choice b man

renerie and petrochemica pant in the

contino catat reeneration proce. Meto

vave eqipped with Nee switchgard inteient

on-off vave controer ive the poibiit to

contro the vave openin and coin troke

and ao provide dianotic on the vave

performance. A afet interock tem i needed

to prevent both the vave above and beow the ock

hopper from openin at the ame time.

Intelligent seat supported ball valve



PROPANE DEHyDROgENATION – 2722/45/02 EN

CONTINuOus CATAlysT REgENERTION APP lICATIONs

APPlICATION REPORT 6/12 5


9150 31 3600XTZ

9150 F Bore ANsI Ca 150 ba vave

31 Raied face ane, Fire Tite, eat pported

3600 staine tee contrction

XTZ Xtreme eat

3. Chlorine addition valve

spent catat enter the top of the reeneration

tower where the coke i brnt off the catat at

hih temperatre and ow oxen concentration.

Catat then pae into the chorination zone.

In thi area, the catat i oxidized at hih

temperatre and hih oxen concentration in

the preence of oranic choride injected into

the circatin a to achieve the proper catat

choride baance.

Valve requirements

• Bbbe-tiht ht-off • Incone® wetted part

• low emiion packin and aket

Metso solution

The Nee W1 serie vave ha been pecica

deined to meet the chorine appication

reqirement ch a the uOP pecication 671.

Eqipped with Meto pnematic cinder actator

and Nee switchgard inteient on-off vave

controer, it provide the idea otion for the

contro of oranic choride. It provide the idea

otion for the contro of oranic choride. Thevave i conred a a wafer te ANsI ca

300 f bore ba vave. Dependin of the capacit

of the CCR, the vave wi be ppied a 3⁄4”, 1”,

or 11⁄2” ize. The vat majorit of the time the

3⁄4” vave i ppied. A Incone contrction i

ed for it metarica compatibiit with the

hih corroive oranic choride. Teon eat

are provided to provide the bbbe tiht ht off

reqired.


W1BU007IIT01-BCM-LS-SV

W1 F bore wafer te ba vave

B ANsI 300 dimenion

u uOP dein and contrction tetin to

uOP 671 pecication

XXX Vave ize 3⁄4”, 1”, 11⁄2”

I Incone 600 bod

I Incone 600 tem ba

T Reinforced PTFE eat

01 TFE ea

B1C Dobe actin actator

Chloride regeneration isolation valve



The information provided in thi betin i advior in natre, and i intended a a ideine on.

For pecic circmtance and more detaied information, peae cont with or oca atomation expert at Meto.

Metso Automation Inc.

Europe, Vanha Porvoontie 229, P.O. Box 304, FI-01301 VANTAA, Finland.Tel. +358 20 483 150. Fax +358 20 483 151

North America, 44 Bowditch Drive, P.O. Box 8044, Shrewsbury, MA 01545, USA.Tel. +1 508 852 0200. Fax +1 508 852 8172

South America, Av. Independéncia, 2500- Iporanga, 18087-101, Sorocaba-São PauloBrazil. Tel. +55 15 2102 9700. Fax +55 15 2102 9748/49

Asia Pacific, 20 Kallang Avenue, Lobby B, #06-00, PICO Creative Centre, Singapore 339411, Singapore.Tel. +65 6511 1011. Fax +65 6250 0830

China, 19/F, the Exchange Beijing, No. 118, Jianguo Lu Yi, Chaoyang Dist, 100022 Beijing, China.Tel. +86-10-6566-6600. Fax +86-10-6566-2575

Middle East, Roundabout 8, Unit AB-07, P.O. Box 17175, Jebel Ali Freezone, Dubai,United Arab Emirates. Tel. +971 4 883 6974. Fax +971 4 883 6836

www.metso.com/valves

APPLICATION REPORT

propane dehydrogenation – continuous catalyst regeneration applications

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