Tsarin lissafi na kwampreshin iska da ka'ida!
A matsayin injiniyan ƙwararru na injin damfara, ban da fahimtar aikin samfur na kamfanin ku, wasu ƙididdiga da ke cikin wannan labarin ma suna da mahimmanci, in ba haka ba, asalin ƙwararrun ku zai zama kodadde.
(Tsarin tsari, bai dace da kowane takamaiman samfur a cikin labarin ba)
1. Samuwar juzu'in juzu'i na "misali murabba'i" da "cubic"
1Nm3/min (daidaitaccen murabba'i) s1.07m3/min
To, ta yaya wannan tuba ta faru?Game da ma'anar ma'auni na murabba'in murabba'i da cubic:
pV=nRT
A karkashin jihohin biyu, matsa lamba, adadin kwayoyin halitta, da ma'auni iri ɗaya ne, kuma bambancin shine kawai zafin jiki (thermodynamic zafin jiki K) an cire shi: Vi/Ti=V2/T2 (wato, Dokar Gay Lussac)
A ɗauka: V1, Ti su ne madaidaicin cubes, V2, T2 cubes ne
Sai: V1: V2=Ti: T2
Wato: Vi: Vz=273: 293
So: Vis1.07V2
Sakamako: 1Nm3/mins1.07m3/min
Na biyu, gwada ƙididdige yawan man da ake amfani da shi na iska
Domin injin kwampreso na iska mai 250kW, 8kg, gudun hijira na 40m3/min, da abun da ke cikin mai na 3PPM, lita nawa na man zai cinye a ka'ida idan yana aiki na awa 1000?
amsa:
Amfanin man fetur a kowace mita cubic a minti daya:
3x 1.2=36mg/m3
, 40 cubic mita a minti daya yawan man fetur:
40×3.6/1000=0.144g
Amfanin mai bayan ya gudana na awanni 1000:
-1000x60x0.144=8640g=8.64kg
Juyawa zuwa girma 8.64/0.8=10.8L
(Muhimmancin man mai yana kusan 0.8)
Abin da ke sama shine kawai amfani da man fetur na ka'idar, a gaskiya ya fi wannan darajar (tatar mai rarraba mai ya ci gaba da raguwa), idan an ƙidaya bisa ga 4000 hours, 40 cubic air compressor zai gudu a kalla 40 lita (ganga biyu) na mai.Yawancin lokaci, kusan ganga 10-12 (lita 18 / ganga) ana sake mai don kowace kulawar injin damfara mai girman murabba'in mita 40, kuma yawan man da ake amfani da shi yana kusan 20%.
3. Lissafin adadin iskar gas na plateau
Ƙididdigar ƙaurawar damfarar iska daga fili zuwa tudu:
Ƙididdigar ƙididdiga:
V1/V2=R2/R1
V1=ƙarar iska a fili, V2=ƙarar iska a yankin tudu
R1=matsawa rabo na fili, R2=matsawa rabo na plateau
Misali: The iska kwampreso ne 110kW, da shaye matsa lamba ne 8bar, da girma kwarara kudi ne 20m3/min.Menene ƙaura na wannan ƙirar a tsayin mita 2000?Tuntuɓi teburin matsa lamba na barometric daidai da tsayi)
Magani: Bisa ga dabara V1/V2= R2/R1
(labaran 1 a sarari, 2 fili ne)
V2=ViR1/R2R1=9/1=9
R2=(8+0.85)/0.85=10.4
V2=20×9/10.4=17.3m3/min
Sa'an nan: yawan shaye-shayen wannan samfurin ya kai 17.3m3/min a tsayin mita 2000, wanda ke nufin cewa idan aka yi amfani da wannan na'urar kwampreshin iska a yankunan tudu, za a rage yawan shaye-shaye.
Sabili da haka, idan abokan ciniki a yankunan plateau suna buƙatar wani adadin iska mai matsa lamba, suna buƙatar kula da ko ƙaurawar injin mu na iska na iya biyan buƙatun bayan hawan hawan sama.
A lokaci guda kuma, yawancin abokan ciniki waɗanda ke gabatar da bukatunsu, musamman waɗanda cibiyar ƙirar ta tsara, koyaushe suna son yin amfani da naúrar Nm3 / min, kuma suna buƙatar kula da jujjuyawar kafin lissafi.
4. Lissafin lokacin cikawa na iska compressor
Yaya tsawon lokacin da injin damfara don cika tanki?Ko da yake wannan lissafin ba shi da amfani sosai, ba daidai ba ne kuma yana iya zama ƙima kawai a mafi kyau.Koyaya, masu amfani da yawa har yanzu suna shirye don gwada wannan hanyar saboda shakku game da ainihin matsugunin injin damfara, don haka har yanzu akwai yanayi da yawa don wannan lissafin.
Na farko shine ka'idar wannan lissafin: a zahiri shine jujjuya juzu'i na jihohin iskar gas guda biyu.Na biyu shine dalilin babban kuskuren lissafin: na farko, babu wani sharadi don auna wasu mahimman bayanai akan wurin, kamar zafin jiki, don haka ba za a iya watsi da shi ba;na biyu, ainihin aiki na ma'aunin ba zai iya zama daidai ba, kamar canzawa zuwa matsayin Cika.
Duk da haka, duk da haka, idan akwai buƙata, har yanzu muna buƙatar sanin irin hanyar ƙididdiga:
Misali: Yaya tsawon lokaci na 10m3/min, 8bar compressor iska don cika tankin ajiyar iskar gas 2m3?Bayani: Me ya cika?Wato na’urar damfara ta iskar tana haxawa da iskar gas mai murabba’in mita 2 cubic, sannan kuma bututun da ke ajiyar iskar gas na qarshen bawul Rufe shi har sai injin damfara ya bugi mashaya 8 don sauke shi, kuma ma’aunin ma’aunin akwatin ajiyar gas shima mashaya 8 ne. .Har yaushe wannan lokacin ya ɗauki?Lura: Wannan lokacin yana buƙatar ƙididdigewa daga farkon loda na'urar kwampreso ta iska, kuma ba zai iya haɗawa da fassarar tauraro-delta da ta gabata ba ko tsarin jujjuyawar mitar mai juyawa.Wannan shine dalilin da ya sa ainihin lalacewar da aka yi a wurin ba zai iya zama daidai ba.Idan akwai hanyar wucewa a cikin bututun da aka haɗa da na'ura mai ɗaukar iska, kuskuren zai zama ƙarami idan injin na'urar ya cika da sauri kuma ya canza zuwa bututun don cika tankin ajiyar iska.
Farko hanya mafi sauƙi (ƙimantawa):
Ba tare da la'akari da yanayin zafi ba:
piVi = pzVz (Dokar Boyle-Malliot) Ta wannan dabarar, an gano cewa canjin ƙarar iskar gas shine ainihin matsi.
Sannan: t=Vi/ (V2/R) min
(Lamba 1 shine ƙarar tankin ajiyar iska, kuma 2 shine ƙarar kwararar injin damfara)
t=2m3/ (10m3/9) min= 1.8min
Yana ɗaukar kusan mintuna 1.8 don cika caji, ko kusan minti 1 da sakan 48
biye da wani ɗan ƙaramin hadadden algorithm
don matsa lamba)
bayyana
Q0 - Matsakaicin ƙarar ƙarar m3 / min ba tare da condensate ba:
Vk - tanki girma m3:
T - lokacin hauhawar farashi min;
px1 - matsa lamba tsotsa MPa:
Tx1 - matsa lamba tsotsa zafin jiki K:
pk1 - matsin lamba MPa a cikin tankin ajiyar gas a farkon hauhawar farashin kaya;
pk2 - Gas matsa lamba MPa a cikin tankin ajiyar gas bayan ƙarshen hauhawar farashin kaya da ma'aunin zafi:
Tk1 - zafin jiki na gas K a cikin tanki a farkon caji:
Tk2 - Gas zafin jiki K a cikin tankin ajiyar gas bayan ƙarshen cajin gas da ma'aunin thermal
Tk - gas zafin jiki K a cikin tanki.
5. Lissafin Amfani da Iska na Kayan Aikin huhu
Hanyar lissafin amfani da iska na tsarin tushen iska na kowace na'urar pneumatic lokacin da take aiki na ɗan lokaci (amfani da tsayawa nan da nan):
Qmax- ainihin iyakar iskar da ake buƙata
Hill – amfani factor.Yana la'akari da ƙididdiga cewa duk kayan aikin pneumatic ba za a yi amfani da su a lokaci guda ba.Ƙimar ƙima shine 0.95 ~ 0.65.Gabaɗaya, yawan adadin kayan aikin pneumatic, ƙarancin amfani da lokaci ɗaya, kuma ƙarami ƙimar, in ba haka ba mafi girman ƙimar.0.95 don na'urori 2, 0.9 don na'urori 4, 0.85 don na'urori 6, 0.8 don na'urori 8, da 0.65 don na'urori fiye da 10.
K1 - Leakage coefficient, ana zaɓar ƙimar cikin gida daga 1.2 zuwa 15
K2 - Ƙimar kayan aiki, an zaɓi darajar a cikin kewayon 1.2 ~ 1.6.
K3 - Rashin daidaituwa
Yana la'akari da cewa akwai rashin daidaituwa a cikin lissafin matsakaicin yawan iskar gas a cikin tsarin tushen iskar gas, kuma an saita shi don tabbatar da iyakar amfani, kuma ƙimarsa shine 1.2.
~1.4 Zabin gida na fan.
6. Lokacin da ƙarar iska bai isa ba, ƙididdige bambancin ƙarar iska
Saboda karuwar kayan amfani da iska, iskar iskar ba ta isa ba, kuma adadin na'urorin da za a iya ƙarawa don kula da matsa lamba na aiki za a iya gamsuwa.dabara:
Q Real - ƙimar kwararar iska da ake buƙata ta tsarin ƙarƙashin ainihin jihar,
QOriginal - yawan jigilar fasinja na kwampreshin iska na asali;
Yarjejeniyar - matsa lamba MPa wanda za'a iya cimma a karkashin yanayi na ainihi;
P asali - matsa lamba MPa wanda za a iya samu ta hanyar amfani da asali;
AQ- volumetric kwararar da za a ƙara (m3/min)
Misali: Asalin damfarar iska shine mita cubic 10 da kilogiram 8.Mai amfani yana ƙara kayan aiki kuma matsa lamba na iska na yanzu zai iya buga 5 kg kawai.Tambayi, nawa ake buƙatar ƙara na'urar damfara don saduwa da buƙatun iska na kilogiram 8.
AQ=10* (0.8-0.5) / (0.5+0.1013)
s4.99m3/min
Saboda haka: ana buƙatar injin damfara tare da ƙaura na akalla mita 4.99 cubic da kilo 8.
A gaskiya ma, ka'idar wannan dabara ita ce: ta hanyar ƙididdige bambanci daga matsin lamba, yana lissafin adadin matsi na yanzu.Ana amfani da wannan rabo ga yawan kwararar injin da ake amfani da shi a halin yanzu, wato, ana samun ƙimar ƙimar da aka yi niyya.
