Nyob rau hauv cov nqe lus ntawm kev tiv thaiv kab, phosphine fumigation yog tam sim no dav siv tshuaj tua kab. Txhawm rau kom ntseeg tau tias cov nyhuv fumigation, nws yog ib qho tsim nyog yuav tsum tau saib xyuas cov concentration ntawm phosphine, carbon dioxide thiab oxygen nyob rau hauv granary thaum lub sij hawm fumigation txheej txheem. Txij li thaum phosphine yog cov pa roj uas muaj kuab lom heev, cov neeg ua haujlwm raug txwv tsis pub nkag mus rau hauv lub tsev khaws khoom kom kuaj xyuas thaum lub sijhawm fumigation, yog li yuav tsum muaj cov cuab yeej tshawb nrhiav roj los xyuas qhov xwm txheej ntawm cov roj hauv granary.
Thaum cov kab mob kab mob ntawm cov nplej (xws li cov nplej tiav lawm, cov nplej nyoos, roj, qos yaj ywm qhuav, cov noob nplej, thiab lwm yam) nce mus txog ib qib, qee qhov nyiaj ntawm aluminium phosphide, calcium phosphide, zinc phosphide, dichlorvos thiab lwm yam tshuaj raug faus rau hauv. cov pawg nplej nyob rau hauv qhov kev sib khi, kom cov phosphides saum toj no nqus cov dej noo hauv qhov khoob thiab cov nplej hauv pawg nplej, tsim cov tshuaj lom neeg, thiab tso tawm cov roj phosphine uas muaj tshuaj lom ntau los tua ntau yam kab tsuag thiab qe hauv pawg nplej. Vim tias cov nplej muaj feem cuam tshuam rau tib neeg txoj kev ua neej, txhawm rau khaws cov nplej los ntawm cov kab tsuag, cov nplej depots yuav tsum tau fumigated tsis tu ncua los tua kab.
Phosphine (PH3) yog ib qho tsis muaj xim, tsis tshua muaj kuab lom nrog cov ntxhiab tsw thiab muaj txiaj ntsig zoo tiv thaiv cov kab tsuag uas khaws cia. Yog li ntawd, nws yog dav siv los ua tshuaj tua kab rau fumigation thiab tshuaj tua kab hauv cov nplej, fur warehouses thiab nkoj cabins. Txawm li cas los xij, kev siv phosphine yuav tsum muaj kev tswj hwm nruj kom tsis txhob muaj teeb meem rau tib neeg lub cev. Vim li no, phosphine ntes tau dav siv hauv chav fumigation thiab granaries kom muaj kev nyab xeeb.
Tshawb nrhiav phosphine concentration: Phosphine detectors yog siv los saib xyuas qhov concentration ntawm phosphine gas hauv chav fumigation thiab granaries hauv lub sijhawm. Cov twj siv hluav taws xob no siv cov qauv siv hluav taws xob los txiav txim siab qhov concentration ntawm phosphine roj los ntawm kev ntsuas qhov loj ntawm cov hluav taws xob teeb liab uas tsim los ntawm cov tshuaj tiv thaiv ntawm phosphine gas nrog lub hauv paus catalyst ntawm lub detector. Phosphine yog cov roj tsis muaj xim, muaj kuab lom nrog cov ntxhiab tsw thiab feem ntau siv rau kev ua kom huv thiab tswj cov kab tsuag hauv cov nplej, fur warehouses thiab nkoj cabins. Thaum lub sij hawm fumigation txheej txheem, phosphine muaj qhov ua tau zoo tiv thaiv cov kab tsuag uas khaws cia, tab sis vim nws cov tshuaj lom, nws cov concentration yuav tsum tau saib xyuas nruj kom tsis txhob muaj kev phom sij ntawm cov neeg ua haujlwm lom.
Tiv thaiv phosphine lom: Lub tshuab phosphine tuaj yeem tshaj tawm ceeb toom ntxov rau lub sijhawm. Thaum cov phosphine concentration ntau tshaj tus qauv los yog ib qho kev xau tshwm sim, qhov ruaj khov phosphine gas detector txuas nrog lub tswb tswj + relay los tswj lub kiv cua ua haujlwm, thiab lub kiv cua yog qhib rau cov tshuab cua kom luv lub sij hawm rau phosphine concentration nyob rau hauv lub warehouse kom poob qis dua tus qauv huv. Qhov no yuav pab kom tsis txhob muaj cov neeg ua haujlwm lom raug mob thiab ua kom muaj kev nyab xeeb ntawm cov neeg ua haujlwm.
Ua kom muaj kev nyab xeeb thiab ua haujlwm ntawm cov txheej txheem fumigation: Raws li cov fumigant nrog kev ua tau zoo, phosphine muaj qhov hnyav molecular, zoo diffusivity, qis boiling point, thiab zoo volatility, thiab nws yog ib qho yooj yim rau nkag mus rau hauv lub qis txheej ntawm cov nplej pawg. Txhawm rau kom muaj kev nyab xeeb ntawm ib puag ncig tom qab fumigation, cov cuab yeej siv niaj hnub muab cov kev daws teeb meem raug thiab ua tau zoo. Los ntawm kev siv phosphine transmitters, kev nyab xeeb thiab kev ua haujlwm ntawm fumigation tuaj yeem ua kom ntseeg tau. Cov transmitters siv high-precision electrochemical sensors nrog cov yam ntxwv ntawm cov lus teb ceev ceev, siab rhiab heev, thiab muaj zog tiv thaiv kev cuam tshuam. Lawv tsim nyog rau lub sijhawm saib xyuas ntawm phosphine concentration hauv ntau yam fumigation scenarios. Lawv tuaj yeem muab cov ntaub ntawv muaj tseeb phosphine concentration los pab txhim kho cov phiaj xwm fumigation thiab ua kom muaj txiaj ntsig fumigation.
Daim ntawv thov dav dav: Ntxiv rau cov nplej silo fumigation,phosphine ntesNws kuj tseem tsim nyog rau cov chaw nres tsheb hauv av, chaw nres tsheb, chaw ua haujlwm, kaw qhov chaw nyob thiab lwm qhov chaw uas phosphine concentration yuav tsum tau kuaj pom. Cov cuab yeej no siv dav-voltage DC fais fab mov thiab cov txheej txheem kev sib txuas lus, uas yooj yim rau nruab thiab siv, thiab txhim kho kev nyab xeeb ntawm cov chaw no.
Nyob rau hauv cov ntsiab lus, daim ntawv thov ntawm phosphine detectors nyob rau hauv fumigation chav thiab granaries yog tsuas yog los xyuas kom meej kev nyab xeeb thiab efficiency ntawm fumigation ua hauj lwm, los ntawm real-time saib xyuas ntawm phosphine concentrations, tiv thaiv kev raug mob lom, thiab optimization ntawm fumigation cov phiaj xwm, yog li kom muaj kev ruaj ntseg zaub mov thiab kev noj qab haus huv ntawm cov neeg ua haujlwm.