Poizoni mpweya mpweya, mawu akatswiri zikumveka pang'ono zachilendo, ndipo si Kufikika m'moyo wamba, kotero ife tikudziwa pang'ono za chidziwitso ichi, koma m'mafakitale ena enieni, zida zamtunduwu zimafunika kuti ntchito yake.Chifukwa cha ntchitoyi, tiyeni tilowe m'dziko lachilendo la mayina ndikuphunzira zachitetezo.
Toxic Gas Detector - Amagwiritsidwa ntchito pozindikira mpweya wapoizoni (ppm) mumlengalenga wozungulira.Mipweya monga carbon monoxide, hydrogen sulfide ndi hydrogen imatha kupezeka.Zowunikira mpweya wapoizoni zimagawidwa kukhala zodziwira mpweya wapoizoni zotetezeka kwambiri komanso zowunikira mpweya wapoizoni wosayaka moto.Zinthu zotetezedwa mwakuthupi ndizinthu zotetezeka zomwe zingagwiritsidwe ntchito pamalo owopsa kwambiri.
Mawonekedwe: 0, 2, 4 ~ 20, 22mA zotulutsa zamakono / chizindikiro cha basi ya Modbus;ntchito yodzitchinjiriza yokha motsutsana ndi kugwedezeka kwamphamvu kwa gasi;mwatsatanetsatane, anti-poisoning kunja kachipangizo;zingwe ziwiri zolowera, zoyenera kuyika pamalowo;chipinda chodziyimira cha gasi Kapangidwe ndi sensa ndizosavuta kusintha;seti yamapulogalamu olumikizira olumikizirana;kutsata ziro zokha ndi kubwezera kutentha;kalasi yotsimikizira kuphulika ndi ExdⅡCT6.
Mfundo yogwira ntchito: Chowunikira choyaka moto / chapoizoni chimayesa chizindikiro chamagetsi pa sensa, ndipo pambuyo pokonza deta yamkati, imatulutsa chizindikiro cha 4-20mA kapena chizindikiro cha basi ya Modbus chofanana ndi ndende ya mpweya wozungulira.
Zowunikira mpweya wapoizoni pazida zozimitsa moto nthawi zambiri zimayikidwa m'mabizinesi a petrochemical.Kodi zowunikira zowunikira mpweya wapoizoni ndi ziti mu "Code for Design of Flammable Gas and Toxic Gas Detection and Alarm in Petrochemical Enterprises" zonenedwa ndi mabungwe aboma?Zowunikira zowunikira mpweya wapoizoni zalembedwa pansipa kuti zipereke chilozera kuti aliyense ayike zowunikira mpweya wapoizoni.
SH3063-1999 "Petrochemical Enterprises Commbustible Gas and Toxic Gas Detection Alamu Design Alamu" imati:
1) Zowunikira mpweya wapoizoni ziyenera kuyikidwa m'malo opanda mphamvu, kugwedezeka, ndi kusokoneza kwamphamvu kwamagetsi amagetsi, ndipo chilolezo chosachepera 0.3m chizisiyidwa mozungulira.
2) Mukazindikira mpweya wowopsa komanso wowopsa, chowunikiracho chiyenera kuyikidwa mkati mwa 1m kuchokera kugwero lotulutsa.
a.Mukazindikira mpweya wapoizoni ndi wowopsa wopepuka kuposa mpweya monga H2 ndi NH3, chowunikira mpweya wapoizoni chiyenera kuyikidwa pamwamba pa gwero lotulutsa.
b.Mukazindikira mpweya wapoizoni ndi woopsa wolemera kuposa mpweya monga H2S, CL2, SO2, ndi zina zotero, chowunikira cha gasi wapoizoni chiyenera kuikidwa pansi pa gwero lotulutsa.
c.Mukazindikira mpweya wapoizoni komanso wowopsa monga CO ndi O2 omwe mphamvu yake yokoka ili pafupi ndi mpweya ndipo imasakanizidwa mosavuta ndi mpweya, iyenera kuyikidwa pamalo osavuta kupuma.
3) Kuyika ndi kuyatsa kwa zowunikira mpweya wapoizoni ziyenera kutsatira zomwe zaperekedwa ndi GB50058-92 "Code for Design of Electric Power for Explosion and Fire Hazardous Environments" kuwonjezera pa zofunikira zomwe wopanga amapanga.
Mwachidule: unsembe wa poizoni zowunikira mpweya ayenera kukhala mkati utali wozungulira wa mita 1 pafupi ndi kutayikira sachedwa malo monga mavavu, mapaipi mapaipi, ndi malo ogulitsa mpweya, pafupi kwambiri ndi kotheka, koma osakhudza ntchito zida zina, ndi yesetsani kupewa kutentha kwambiri, chilengedwe cha chinyezi chambiri komanso zokopa zakunja (monga kuthira madzi, mafuta komanso kuthekera kwa kuwonongeka kwamakina.) Nthawi yomweyo, ziyenera kuganiziridwa kuti ndizosavuta kukonza ndikuwongolera.
Kuphatikiza pa kulabadira kuyika kolondola ndi kugwiritsa ntchito zida zowunikira mpweya wapoizoni, kukonza chitetezo cha makina ndi gawo lomwe silinganyalanyazidwe.Zida zozimitsa moto zimakhala ndi moyo wina, ndipo pakatha nthawi yogwiritsira ntchito, padzakhala mavuto amtundu wina, ndipo momwemonso ndi zowunikira mpweya wapoizoni.Pambuyo poika chowunikira mpweya wapoizoni, zolakwika zina zofala zimatha kuchitika pakatha nthawi yayitali.Mukakumana ndi vuto, mutha kuloza njira zotsatirazi.
1. Pamene kuwerenga kumasiyana kwambiri ndi zenizeni, chifukwa cha kulephera kungakhale kusintha kwa chidziwitso kapena kulephera kwa sensa, ndipo sensa ikhoza kusinthidwanso kapena kusinthidwa.
2. Chidacho chikalephera, chikhoza kukhala waya wotayirira kapena wozungulira;sensa yawonongeka, yotayirira, yozungulira yayifupi kapena ndende yayikulu, mutha kuyang'ana waya, m'malo mwa sensa kapena kukonzanso.
3. Kuwerengako kukakhala kosakhazikika, kungakhale chifukwa cha kusokonezeka kwa mpweya panthawi ya kusanja, kulephera kwa sensa, kapena kulephera kwa dera.Mutha kukonzanso, kusintha sensor, kapena kuitumizanso kukampani kuti ikonzedwe.
4. Pamene zotulukapo zaposachedwa zipitilira 25mA, gawo lomwe limatulutsa pano ndi lolakwika, tikulimbikitsidwa kuti titumizenso ku kampaniyo kuti likakonze, ndipo zolakwika zina zitha kubwezeredwa ku kampaniyo kuti ikakonze.
Nthawi yotumiza: Jun-06-2022