Popanga mafakitale ndi kupanga, matanki ena omwe amayezedwa ndi osavuta kuyimitsa, owoneka bwino, owononga kwambiri, komanso osavuta kulimba. Ma transmitters a single and double flange differential pressure transmitters amagwiritsidwa ntchito munthawi izi. , Monga: akasinja, nsanja, ma ketulo, ndi akasinja mu zomera coking; matanki osungira madzi opangira ma evaporator mayunitsi, akasinja osungira madzi amadzimadzi a desulfurization ndi denitrification zomera. Abale osakwatiwa ndi awiri a flange ali ndi mapulogalamu ambiri, koma ndi osiyana ndi kusiyana pakati pa otsegula ndi osindikizidwa. Matanki otseguka a single-flange amatha kutsekedwa akasinja, pomwe ma flange awiri amakhala ndi akasinja otsekedwa kwa ogwiritsa ntchito.
Mfundo ya single flange kuthamanga transmitter kuyeza madzi mlingo
The single-flange pressure transmitter imachita kutembenuka kwa mulingo poyesa kuchuluka kwa thanki yotseguka, Mulingo wa mulingo wa zotengera zotseguka.
Poyezera mulingo wamadzimadzi mu chidebe chotseguka, cholumikizira chimayikidwa pafupi ndi pansi pa chidebecho kuti chiyeze kuthamanga kolingana ndi kutalika kwa mulingo wamadzimadzi pamwamba pake. Monga momwe chithunzi 1-1 chikusonyezera.
Kuthamanga kwa mlingo wamadzimadzi wa chidebecho kumagwirizanitsidwa ndi mbali yothamanga kwambiri ya transmitter, ndipo mbali yochepetsetsa yotsika imatsegulidwa kumlengalenga.
Ngati mulingo wotsikitsitsa wamadzimadzi wa mulingo wosinthika wamadzimadzi uli pamwamba pa malo oyika chowulutsira, chotumizira chiyenera kusamuka bwino.
Chithunzi 1-1 Chitsanzo cha kuyeza madzi mu chidebe chotsegula
Lolani X kukhala mtunda woyima pakati pa mulingo wamadzi wotsikitsitsa ndi wapamwamba kwambiri womwe ungayesedwe, X=3175mm.
Y ndiye mtunda woyima kuchokera pa doko lopondereza la chotumizira kupita kumalo otsika kwambiri amadzimadzi, y=635mm. ρ ndi kuchuluka kwa madzi, ρ=1.
h ndiye mutu wapamwamba kwambiri wopangidwa ndi mzere wamadzi X, mu KPa.
e ndiye mutu wopanikizika wopangidwa ndi mzere wamadzi Y, mu KPa.
1mH2O=9.80665Pa (zofanana pansipa)
Miyezo imachokera ku e mpaka e+h kotero: h=X·ρ=3175×1=3175mmH2O=31.14KPa
e=y·ρ=635×1= 635mmH2O= 6.23KPa
Ndiye kuti, kuyeza kwa transmitter ndi 6.23KPa～37.37KPa
Mwachidule, timayesa kutalika kwa mulingo wamadzimadzi:
Kutalika kwamadzimadzi H=(P1-P0)/(ρ*g)+D/(ρ*g);
Zindikirani: P0 ndiye mphamvu yapano ya mumlengalenga;
P1 ndiye kufunikira koyezera mbali yothamanga kwambiri;
D ndi kuchuluka kwa ziro kusamuka.
Mfundo iwiri flange kuthamanga transmitter kuyeza madzi mlingo
The double-flange pressure transmitter imachita kutembenuka poyesa kuchuluka kwa thanki yosindikizidwa: Dry impulse connection.
Ngati mpweya pamwamba pa madzi pamwamba si condense, cholumikizira chitoliro pa otsika-anzanu mbali ya transmitter amakhala youma. Izi zimatchedwa kugwirizana koyendetsa ndege. Njira yodziwira kuchuluka kwa ma transmitter ndi yofanana ndi yamadzimadzi mu chidebe chotseguka. (Onani Chithunzi 1-2).
Ngati mpweya wamadzimadziwo utakhazikika, madziwo amadziunjikira pang'onopang'ono mu chubu chowongolera pamagetsi otsika kwambiri a transmitter, zomwe zingayambitse zolakwika muyeso. Kuti muchotse cholakwikacho, dzazanitu chubu cholozera chapakatikati cha transmitter ndi madzi enaake. Izi zimatchedwa wet pressure guiding connection.
Zomwe zili pamwambazi, pali kupanikizika kwamutu kumbali yotsika ya transmitter, kotero kusamuka koyipa kuyenera kuchitika (onani Chithunzi 1-2)
Chithunzi 1-2 Chitsanzo cha kuyeza kwamadzi mumtsuko wotsekedwa
Lolani X kukhala mtunda woyima pakati pa madzi otsika kwambiri ndi apamwamba kwambiri kuti ayezedwe, X=2450mm. Y ndiye mtunda woyima kuchokera pa doko lopondereza la chotumizira kupita kumalo otsika kwambiri amadzimadzi, Y=635mm.
Z ndi mtunda kuchokera pamwamba pa chubu cholozera chodzaza madzi mpaka pamzere woyambira wa transmitter, Z=3800mm,
ρ1 ndiye kuchuluka kwa madzi, ρ1=1.
ρ2 ndi kachulukidwe kamadzimadzi odzazitsa panjira yotsika, ρ1=1.
h ndiye mutu wothamanga kwambiri wopangidwa ndi gawo lamadzi loyesedwa X, mu KPa.
e ndiye mutu wothamanga kwambiri wopangidwa ndi gawo lamadzi loyesedwa Y, mu KPa.
s ndiye mutu woponderezedwa wopangidwa ndi gawo lamadzi lodzaza Z, mu KPa.
Muyeso woyezera umachokera ku (es) kufika ku (h+es), ndiye
h=X·ρ1=2540×1 =2540mmH2O =24.9KPa
e=Y·ρ1=635×1=635mmH2O =6.23KPa
s=Z·ρ2=3800×1=3800mmH2O=37.27KPa
Choncho: es=6.23-37.27=-31.04KPa
h+e－s=24.91+6.23－37.27=－6.13KPa
Chidziwitso: Mwachidule, timayesa kutalika kwa mulingo wamadzimadzi: kutalika kwamadzimadzi H=(P1-PX)/(ρ*g)+D/(ρ*g);
Zindikirani: PX ndi kuyeza kuchuluka kwa kuthamanga kwa mbali yotsika;
P1 ndiye kufunikira koyezera mbali yothamanga kwambiri;
D ndi kuchuluka kwa ziro kusamuka.
Kusamala Kuyika
Kuyika kwa flange imodzi ndikofunikira
1. Pamene flange kudzipatula nembanemba transmitter kwa akasinja lotseguka ntchito madzi mlingo muyeso wa akasinja otseguka madzi, L mbali ya otsika kuthamanga mbali mawonekedwe ayenera lotseguka mlengalenga.
2. Kwa thanki yosindikizidwa yamadzimadzi, chubu chowongolera chiwongolero chowongolera kuthamanga mu thanki yamadzimadzi chiyenera kukhala chopopera pa L mbali ya mawonekedwe otsika. Imatchulanso mphamvu ya tanki. Kuphatikiza apo, nthawi zonse tsegulani valavu yakuda kumbali ya L kuti mukhetse condensate m'chipinda cham'mbali cha L, apo ayi zingayambitse zolakwika pakuyezera kwamadzimadzi.
3. Wotumiza amatha kulumikizidwa ndi kuyika kwa flange kumbali yothamanga kwambiri monga momwe tawonetsera pa Chithunzi 1-3. Flange kumbali ya thanki nthawi zambiri imakhala yosunthika, yomwe imakhazikika panthawiyo ndipo imatha kuwotcherera ndikudina kamodzi, komwe ndi koyenera kuyika pamalowo.
Chithunzi 1-3 Kuyika chitsanzo cha mtundu wa flange fluid level transmitter
1) Poyezera mulingo wamadzimadzi mu thanki yamadzimadzi, mulingo wotsikitsitsa wamadzimadzi (zero point) uyenera kukhazikitsidwa pa mtunda wa 50mm kapena kupitilira apo kuchokera pakatikati pa chisindikizo cha diaphragm chapamwamba kwambiri. Chithunzi 1-4:
Chithunzi 1-4 Chitsanzo cha kukhazikitsa kwa thanki yamadzimadzi
2) Ikani cholumikizira cha flange pamtunda wapamwamba (H) ndi wotsika (L) wa tanki monga zikuwonekera pa transmitter ndi sensor label.
3) Pofuna kuchepetsa chikoka cha kusiyana kwa kutentha kwa chilengedwe, machubu a capillary omwe ali kumbali yothamanga kwambiri amatha kumangirizidwa pamodzi ndikukhazikika kuti ateteze mphamvu ya mphepo ndi kugwedezeka (machubu a capillary a gawo lalitali kwambiri ayenera kukulungidwa pamodzi ndikukhazikika).
4) Panthawi yoyikapo, yesetsani kuti musagwiritse ntchito mphamvu ya dontho lamadzi osindikizira ku chidindo cha diaphragm momwe mungathere.
5) Thupi la transmitter liyenera kukhazikitsidwa mtunda wopitilira 600mm kumunsi kwa gawo lakutali lakutali la flange diaphragm seal, kotero kuti kutsika kwamadzimadzi a capillary seal kuwonjezeredwa ku thupi la transmitter momwe kungathekere.
6) Zachidziwikire, ngati sichingayikidwe 600mm kapena kupitilira apo pagawo la unsembe wa flange diaphragm chisindikizo chifukwa cha kuchepa kwa zinthu zoyika. Kapena pamene thupi la transmitter likhoza kukhazikitsidwa pamwamba pa gawo loyika chisindikizo cha flange chifukwa cha zifukwa zomveka, malo ake oyika ayenera kukwaniritsa ndondomeko yotsatirayi.
1) h: kutalika pakati pa mbali yakutali ya flange diaphragm yoyika chisindikizo ndi transmitter body (mm);
① Pamene h≤0, thupi la transmitter liyenera kukhazikitsidwa pamwamba pa h (mm) pansi pa gawo loyika chisindikizo cha flange diaphragm.
②Pamene h> 0, thupi lotumizira liyenera kuyikidwa pansi pa h (mm) pamwamba pa gawo loyika chisindikizo cha flange diaphragm.
2) P: Kupanikizika kwamkati kwa thanki yamadzimadzi (Pa abs);
3) P0: Kutsika kwapang'onopang'ono komwe kumagwiritsidwa ntchito ndi thupi la transmitter;
4) Kutentha kozungulira: -10 ~ 50 ℃.
Nthawi yotumiza: Dec-15-2021