Distillation ntauwd yog cov cuab yeej tseem ceeb uas feem ntau siv rau hauv kev tsim cov tshuaj petrochemical, uas ua rau muaj kev sib raug zoo ntawm cov roj-kua lossis cov kua-kua theem, ua tiav lub hom phiaj ntawm huab hwm coj thiab kub hloov ntawm theem. Nrog rau txoj kev loj hlob ntawm Tuam Tshoj cov petrochemical thiab refining industries, kev siv cov xov xwm corrosive heev yog nce, thiab cov kev xav tau ntawm cov ntaub ntawv yog siab dua. Corrosion resistant cov ntaub ntawv xws li cov hlau uas tsis yog-ferrous thiab lawv cov khoom sib xyaw phaj tau dhau los ua ntau thiab ntau dua. Kab lus no yuav siv ntauwd distillation hauv PTA project ua piv txwv los piav qhia txog cov teeb meem uas tau ntsib nyob rau hauv cov txheej txheem tsim ntawm lub distillation ntauwd, vam tias yuav muab qee qhov kev siv rau cov cuab yeej zoo sib xws yav tom ntej.
1. Cov tsis tseem ceeb
Thiab qhov kev xaiv ntawm distillation ntauwd ua haujlwm nruab nrab yog: acetic acid, dej, thiab lwm yam; Lub siab tsim yog 1.4MPa / FV; Tsim kub 245 degree @ 1.4MPa / 100 degree C @ FV. Qhov yooj yim cua siab yog 500N / ㎡; Kev siv seismic yog 7 degrees; Qhov yooj yim seismic acceleration yog 0.10g; teeb tsa
Seismic grouping yog thawj pab pawg; Cov av hom ntawm qhov chaw yog Class IV, thiab cov av roughness qeb yog A. Daim duab schematic ntawm cov khoom qauv qhov ntev yog qhia nyob rau hauv daim duab 1. Qhov nruab nrab hauv PTA nroj tsuag muaj zog corrosiveness, thiab titanium cov khoom yuav zoo dua raws li corrosion kuj yuav tsum tau. . Vim tias tus nqi siab ntawm cov khoom siv titanium thiab nws qhov tsis tsim nyog rau kev tsim cov hlab ntsha loj, siv cov titanium hlau sib xyaw ua ke los tsim cov hlab ntsha siab tuaj yeem txo cov nqi khoom. TA1 muaj zog qis dua, zoo dua toughness, thiab tsis tshua muaj kev ntxhov siab tom qab tawg. Lub zog sib txuas ntawm cov phaj sib xyaw yog siab dua. Yog li ntawd, thaum xaiv TA1+Q345R ua cov khoom tseem ceeb compression tivthaiv thiab titanium steel composite phaj, cladding tsis suav nrog lub zog thiab tsuas yog txiav txim siab
Xav txog lub zog ntawm lub hauv paus txheej, nws yog ib qho tsim nyog los tawm tswv yim cov kev cai rau carbon sib npaug, hardness, cuam tshuam kev ntsuam xyuas, kuaj ultrasonic, thiab lwm yam. rau Q345R siv nyob rau hauv lub hauv paus txheej los xyuas kom meej cov mechanical zog ntawm lub hauv paus steel phaj. Txhawm rau kom muaj kev sib raug zoo ntawm cov khoom siv titanium coated thiab lub hauv paus steel phaj, titanium steel composite phaj yuav tsum tau ua kom tawg, raws li cov kev cai ntawm NB/T47002.3-2019 B1 qib, thiab muab rau hauv kev txo kev ntxhov siab annealing xeev. Lub zog shear ntawm cov phaj sib xyaw yuav tsum siab dua lossis sib npaug ntawm 180MPa thaum muab khoom.
Vim yog kev tsim cov txheej txheem xws li lub tog raj kheej dov, lub taub hau tsim, thiab tom qab vuam kev kho cua sov thaum lub sij hawm tsim khoom, lub zog shear ntawm cov phaj sib xyaw yuav txo qis. Txhawm rau kom muaj kev nyab xeeb ntawm cov cuab yeej siv, tom qab ua tiav cov khoom tsim, lub zog shear ntawm cov phaj sib xyaw yuav tsum tau ua kom tsis pub tsawg tshaj 140MPa.
2. Kev tsim qauv tseem ceeb ntawm cov khoom siv
2.1 T-shaped welded sib koom ua ke ntawm titanium hlau puas phaj
T-shaped sib koom ua ke ntawm lub longitudinal thiab circumferential welding pob qij txha ntawm cov phaj sib xyaw yog pom nyob rau hauv daim duab 2. Ib tug nyias T-shaped cover phaj nrog ib tug puag ncig lub ces kaum feem ntau yog siv nyob rau hauv lub T-shaped sib koom tes. Rau qhov yooj yim ntawm kev tiv thaiv roj argon nyob rau sab nraub qaum thaum vuam thiab xau pom ntawm qhov sib tshooj ntawm lub phaj npog, tsawg kawg 2 Φ 6 qhov pom qhov xau yuav tsum tau drilled rau ntawm lub gasket ntawm txhua qhov ntev thiab voj voog sib koom ua ke, thiab qhov chaw ntawm lub qhov dej los nrhiav kom pom yuav tsum nyob ze li qhov ua tau mus rau qhov siab thiab qis cov ntsiab lus ntawm longitudinal weld thiab ob qhov kawg ntawm lub voj voog ncig. Txhawm rau txhawm rau txhawm rau xau cov ntsiab lus nyob rau lub sijhawm thiab txo cov kev siv ntawm kev siv nraub qaum thaum lub tog raj kheej kom pom tseeb ntawm txhua lub tog raj kheej ob tog tsis sib haum. Yog li ntawd, lub ncoo nyob rau hauv T-shaped cover phaj yuav tsum tau muab kaw nrog nyiaj brazing thaum txuas mus rau lub longitudinal vuam sib koom ua ke ntawm lwm lub tog raj kheej hauv ob sab phlu.
2.2 Flange takeover
Vim yog qhov loj ntawm cov txheej txheem yeeb nkab lub qhov ncauj, txhawm rau ua kom muaj kev ruaj ntseg ntawm kev sib txuas ntawm cov yeeb nkab txuas thiab lub plhaub, cov yeeb nkab txuas tau siv cov yeeb nkab tuab tuab rau cov yeeb nkab rau kev txhawb nqa tag nrho. Sab hauv phab ntsa ntawm cov yeeb nkab txuas tau txais cov qauv titanium hauv ob sab phlu, uas yuav tsum ua kom nruj haum ntawm titanium hauv ob sab phlu thiab sab hauv ntawm cov yeeb nkab txuas. Vim yog cov khoom sib txawv ntawm lub plhaub thiab cov hauv ob sab phlu, qhov kev ntxhov siab tsim los ntawm thermal expansion
Ib yam li ntawd, qhov superposition ntawm kev ntxhov siab tuaj yeem ua rau muaj kev puas tsuaj ntawm qhov sib txuas ntawm cov yeeb nkab txuas thiab lub plhaub hauv ob sab phlu. Yog li ntawd, cov qauv kev sib txuas ntawm cov yeeb nkab txuas hauv ob sab phlu thiab lub plhaub hauv ob sab phlu yuav tsum ua kom muaj kev ywj pheej txaus ntawm kev sib tshuam thiab tsis txhob muaj kev ntxhov siab tseem ceeb ntawm kev sib koom ua ke. Kev sib txuas ntawm lub plhaub thiab cov yeeb nkab txuas yuav tsum tau txais cov qauv flanged kom tswj tau qhov kev hloov pauv. Txhawm rau kuaj xyuas cov dej xau hauv titanium hauv ob sab phlu thaum lub sijhawm ua haujlwm ntawm cov khoom siv thiab ua lub qhov hluav taws xob rau cov roj sib txuas ntawm cov yeeb nkab txuas thiab cov hauv ob sab phlu, ob lub 6 hli txoj kab uas hla ntawm cov qhov dej yuav tsum tau muab ntsia rau sab nraum qab ntawm txhua qhov txuas cov yeeb nkab hauv ob sab phlu, nyob ntawm lub caj dab ntawm qhov txuas. yeeb nkab flange thiab qhov qis tshaj ntawm lub plhaub nyob ze. Cov txheej txheem flanging hauv ob sab phlu thiab xau nrhiav qhov qhov qauv ntawm lub flange takeover yog cov ncauj lus kom ntxaws hauv daim duab 3.
Lub sealing nto tsim ntawm lub flange yog qhov tseem ceeb tshaj plaws rau kev sib khi ntawm flange. Lub distillation ntauwd txais ib lub caj dab ntev ntev forging flange, thiab flange sealing nto yog ua los ntawmtitanium steel composite phaj. Cov ncauj lus kom ntxaws cov qauv yog pom nyob rau hauv daim duab 4. Lub hauv paus txheej ntawm flange sealing nto composite phaj yog ruaj khov welded rau flange forging, thiab titanium hauv ob sab phlu hauv cov yeeb nkab txuas yog welded rau sealing nto composite phaj cladding siv lub kaum ntse ntse welded. sib koom nrog ib daim ntawv thaub qab. Hom sealing nto zoo heev ua rau muaj kev nyab xeeb ntawm flange sealing. Vim qhov yooj yim to ntawm lub flange sealing nto, lub flange ntsia liaj qhov rooj qhov yuav tsum tau lined nrog titanium qauv kom tsis txhob muaj ceev ceev corrosion ntawm flange carbon steel ib feem thiab xyuas kom meej kev ruaj ntseg ntawm cov khoom.
