Cov cuab yeej loj - txoj kab uas hla yog siv dav hauv cov dej xa dej thiab cov dej ntws, xws li kev saib xyuas cov kav dej loj hauv nroog cov kav dej hauv nroog thiab kev ntsuas dej phwj hauv cov chaw kho dej phwj. Lawv qhov loj - txoj kab nruab nrab tsim tuaj yeem hloov kho kom haum rau cov kev xav tau siab txaus thiab ua kom muaj kev ntsuas qhov tseeb hauv cov dej loj - kev thauj mus los. Me me thiab nruab nrab txoj kab uas hla electromagnetic flowmeters feem ntau yog siv rau qhov nyuaj- rau- ntsuas cov kua xws li khoom-kua ob-phase flowmeters lossis hauv cov ntawv thov. Piv txwv li, lawv tau siv los ntsuas qhov ntws ntawm cov kua txiv hmab txiv ntoo thiab cov dej cawv dub hauv kev lag luam ntawv, qhov twg cov kua dej no muaj ntau cov fiber ntau thiab impurities, ua rau lawv nyuaj rau kev ntsuas kom raug nrog cov tshuaj flowmeters. Electromagnetic flowmeters, nrog rau lawv zoo heev adaptability rau cov kua conductive, yog ib qho kev xaiv zoo tagnrho. Hauv kev lag luam uas tsis yog- ferrous metallurgical kev lag luam, kev tswj kom meej meej yog xav tau rau kev thauj mus los slurry kom ntseeg tau tias kev ua haujlwm zoo; electromagnetic flowmeters tuaj yeem tswj tau qhov siab concentration thiab abrasive yam ntxwv ntawm slurries. Hauv cov nroj tsuag npaj cov thee, electromagnetic flowmeters tuaj yeem saib xyuas cov dej ntws hauv lub sijhawm tiag tiag thaum lub sijhawm thauj cov thee slurry, optimizing thee ntxuav txheej txheem. Hauv kev lag luam tshuaj, cov khoom siv hauv ob sab phlu ntawm electromagnetic flowmeters raug xaiv los muab kev tiv thaiv corrosion zoo heev rau cov kua qaub thiab alkali kev daws, kom ntseeg tau ntev - lub sijhawm ua haujlwm ruaj khov. Hauv kev lag luam steel, electromagnetic flowmeters tuaj yeem soj ntsuam xyuas cov dej txias thiab tam sim ntawd ntes cov xau hauv qhov cub tawg tuyeres cov dej txias tswj thiab kuaj pom, ua kom muaj kev nyab xeeb ntawm lub tshuab tawg. Nyob rau hauv ntev -kev ncua deb hydraulic coal pipeline tsheb thauj mus los, electromagnetic flowmeters yog siv los ntsuas ntws thiab tswj, kom ntseeg tau qhov txuas ntxiv thiab raug ntawm kev thauj mus los. Cov me me-inch thiab micro-inch electromagnetic flowmeters feem ntau yog siv rau kev nyiam huv- ib puag ncig tseem ceeb xws li kev lag luam tshuaj, zaub mov, thiab bioengineering industries. Piv txwv suav nrog kev xa tshuaj thiab ntsuas hauv cov txheej txheem tshuaj, kev tswj cov khoom siv raw hauv cov kab ntau lawm, thiab kab lis kev cai nruab nrab ntawm kev saib xyuas hauv bioreactors. Cov qauv dej tsis muaj kev cuam tshuam thiab yooj yim- rau- cov yam ntxwv huv ntawm cov tshuab electromagnetic flowmeters ua tau raws li cov qauv kev nyiam huv thiab kev huv huv. Electromagnetic flowmeters tuaj yeem siv rau kev ntsuas hauv txhua daim ntawv thov no.
Electromagnetic flowmeters tuaj yeem xaiv raws li hauv qab no rau 6 lub ntsiab lus tseem ceeb:
1. Cov chav kawm raug thiab ua haujlwm: Nyob ntawm daim ntawv thov yuav tsum tau xaiv cov chav kawm raug tsim nyog. Feem ntau, cov ntawv thov kev lag luam siv cov chav kawm raug ntawm 0.5, 1, lossis 2. Qhov tseeb siab dua yog qhov yuav tsum tau thov rau cov ntawv thov xws li kev sib pauv kev lag luam. Functionally, cov kev xaiv muaj xws li kev ntsuas bidirectional flow, tag nrho cov lej suav, tshaj - lub tswb ntau, kev tiv thaiv hluav taws xob tsis ua haujlwm, thiab cov ntaub ntawv xa mus rau cov chaw taws teeb (xws li 4-20mA cov teeb liab tso tawm, HART raws tu qauv, Modbus raws tu qauv, thiab lwm yam) kom tau raws li qhov xav tau ntawm kev tswj hwm qhov system.
2. Flow velocity, full-scale flow rate, rangeability, and pipe diameter: Kev xaiv ntawm ntws tshaj tawm yuav tsum yog nyob ntawm cov yeeb nkab txoj kab uas hla thiab ntws tus nqi. Kev khiav ceev ntawm 0.5-8 m/s feem ntau pom zoo. Qhov qis tshaj tawm tuaj yeem ua rau muaj kev poob qis, thaum lub siab tshaj plaws tuaj yeem tsim cov eddies, cuam tshuam rau kev ntsuas qhov tseeb. Tus nqi tag nrho ntawm cov dej ntws yuav tsum tau teeb tsa ntawm kwv yees li 70% -80% ntawm cov nquag siv ntws los xyuas kom meej linearity thiab stability. Rangeability yog hais txog qhov sib piv ntawm qhov siab tshaj plaws mus rau qhov tsawg kawg nkaus ntws tus nqi uas ntsuas ntsuas tau. Electromagnetic flowmeters feem ntau muaj qhov sib txawv ntawm 1:20 txog 1:100; Thaum xaiv ib lub flowmeter, xyuas kom meej tias qhov tseeb txaus tus nqi poob rau hauv qhov ntau. Txoj kab uas hla ntawm cov yeeb nkab yuav tsum tau muab tso rau hauv cov yeeb nkab txoj kab uas hla, los yog txuas nrog kev txo cov fittings, kom ntseeg tau tias cov dej txaus tsim nyob rau hauv cov yeeb nkab thiab txo cov eddy tam sim no cuam tshuam.
3. Liquid conductivity: Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm electromagnetic flowmeter yog raws li Faraday txoj cai ntawm electromagnetic induction, yuav tsum tau ntsuas cov kua kom muaj qee yam conductivity, feem ntau ntau dua 5 μS / cm. Rau cov dej ntshiab uas tsis muaj conductivity, yuav tsum tau tsim tshwj xeeb tsim electromagnetic flowmeter los yog ntxiv cov electrolyte. Yog hais tias cov kua conductivity tsawg dhau, lub teeb liab yuav tsis muaj zog, nce kev ntsuas yuam kev.
4. Cov impurities nyob rau hauv cov kua: muaj impurities xws li huab cua npuas, khoom particles, los yog fibers nyob rau hauv cov kua tej zaum yuav cuam tshuam rau kev ntsuas qhov tseeb. Cov npuas huab cua tuaj yeem ua rau cov hluav taws xob luv luv, tsim cov cim tsis tseeb; Cov khoom siv tuaj yeem hnav cov electrodes los yog ua raws li cov electrode nto, hloov cov electrode Circuit Court tsis kam; Cov ntaub ntawv fibrous tuaj yeem nkag mus rau ntawm cov electrodes, cuam tshuam cov teeb liab kis. Yog li ntawd, hom, concentration, thiab daim ntawv ntawm impurities yuav tsum tau txiav txim siab thaum xaiv tus qauv. Kev ntsuas ua ntej (xws li txhim kho cov ntxaij lim dej lossis deaerators) lossis xaiv tus qauv uas muaj peev xwm tiv thaiv - cuam tshuam kev cuam tshuam.
5. Adhesion thiab Sedimentation: Thaum ntsuas cov kua dej uas nquag ua rau sedimentation lossis adhesion (xws li cov tshuaj lom neeg thiab cov slurries), ib txheej ntawm cov deposit tuaj yeem ua raws li electrode nto, ua rau muaj kev hloov pauv hauv electrode Circuit Court tsis kam thiab ua rau kev ntsuas yuam kev. Txhawm rau daws qhov teeb meem no, lub tshuab hluav taws xob electromagnetic flowmeter nrog lub tshuab hluav taws xob scraper thiab kev tu hauv online tuaj yeem xaiv, lossis cov khoom siv hauv ob sab phlu xws li PTFE (polytetrafluoroethylene) uas tsis tuaj yeem ua rau adhesion tuaj yeem siv tau, nrog kev tu thiab tu kom tsis tu ncua kom ntsuas qhov tseeb.
6. Kev xaiv cov khoom siv rau cov khoom sib txuas nrog cov kua dej: Cov khoom siv rau cov khoom sib txuas nrog cov kua dej (xws li electrodes, linings, flange seals, thiab lwm yam) yuav tsum tau xaiv raws li corrosiveness, kub, siab, thiab lwm yam ntxwv ntawm cov kua uas raug kuaj. Rau siab - kub xov xwm, siab - cov ntaub ntawv kub thiab cov khoom siv hluav taws xob yuav tsum raug xaiv. Rau cov ntawv thov kev nyiam huv siab, cov ntaub ntawv xws li 316L stainless hlau tuaj yeem siv los ua kom cov khoom muaj kev nyab xeeb thiab kev sib raug zoo.
