Machubhu esimbi asina musono eChromium molybdenum (Cr Mo) ekugadzirisa mabhaira ndiwo zvinhu zvikuru zvinoshandiswa mumabhoira ekushandisa, mabhoira emaindasitiri, uye maovheni epetrochemical pasi pekupisa kwakanyanya uye kumanikidzwa kwakanyanya. Anogona kupatsanurwa zvichienderana nehukuru hunotevera.

1. Kupatsanurwa neSimbi kana Rudzi (Kupatsanurwa Kwepakati)

Chiyero chechubhu yeCr Mo isina musono chinosarudza zvakananga tembiricha yayo uye kumanikidzwa kwayo. Magiredhi akafanana uye zviyero zvinoenderana zvakanyorwa pazasi.

Giredhi reSimbi kana Rudzi
Zvakajairika
Zviri mukati meCr (muzana)
Zviri mukati memwedzi (muzana)
Tembiricha yesimbi inoshanda (degree Celsius)
Kushandiswa kwakajairika

15CrMoG
GB/T 5310
0.80 kusvika 1.10
0.25 kusvika 0.35
kusvika ku550
superheater, reheater, musoro

12Cr1MoVG
GB/T 5310
0.90 kusvika 1.20
0.25 kusvika 0.35
kusvika ku580
chitofu chekupisa chakakwira, chitofu chekupisa chakakwira

12Cr2MoG
GB/T 5310
2.00 kusvika 2.50
0.90 kusvika 1.10
kusvika ku600
zvikamu zvekupisa kwepamusoro-soro kana kuti zvepamusoro-soro zveboiler

T11 / P11
ASTM A213 /A335
1.00 kusvika 1.50
0.44 kusvika 0.65
kusvika ku540
machubhu ekupisa pamusoro pebhoyila (T11), misoro nemapombi (P11)

T22 / P22
ASTM A213 / A335
2.00 kusvika 2.50
0.87 kusvika 1.13
kusvika ku580
chitofu chekupisa chakakwira, chitofu chekupisa chakakwira

T91 / P91
ASTM A213 / A335
8.00 kusvika 9.50
0.85 kusvika 1.05
kusvika ku650
bhaira rinopisa zvakanyanya kupisa kwepamusoro-soro

T92 / P92
ASTM A213 / A335
8.50 kusvika 9.50
0.30 kusvika 0.60
kusvika ku650
zvikamu zvinoda simba rakanyanya kukwira

Cherechedza: Mu GB/T 5310, chivakashure G chinomiririra chubhu yebhoyira ine pressure yakakwira. Mumitemo yeAmerica, T series (Tube) inoshandiswa kumachubhu ekupisa epamusoro ane dhayamita diki, nepo P series (Pipe) ichishandiswa kumaheaders edhayamita yakakura uye mapaipi.

2. Kupatsanurwa neChinzvimbo cheChikamu cheBoiler

Nzvimbo yechikamu
Magiredhi akafanana
Tembiricha yesimbi yakajairika (degree Celsius)
Zvinodiwa zvikuru

Chubhu yemadziro emvura
15CrMoG, 20G
400 kusvika 500
kuramba oxidation, simba rakakwana rekukwira

Chubhu yeSuperheater
12Cr1MoVG, T91, T92
550 kusvika 650
simba rakanaka kwazvo rekukwira tembiricha yepamusoro uye kuramba kwemhepo inoodza mweya

Chubhu yekudziisazve
12Cr1MoVG, T91
550 kusvika 600
yakafanana ne superheater asi ine madziro akatetepa zvishoma

Chubhu yeEconomizer
15CrMoG, 20G
pasi pe450
kuramba ngura kwechikamu chekupisa kwakaderera

Musoro
12Cr1MoVG, P22, P91
pedyo nekupisa kwemhepo
rusvingo rwakakora, kuramba kumanikidzwa, kugona kusundira zvakanaka

Mapombi makuru emhepo
P22, P91, P92
540 kusvika 620
simba guru rekukwira, kuramba kupisa kuneta

3. Kurongwa neMaitiro Ekugadzira

Kunyangwe ese ari machubhu asina musono, machubhu eCr Mo emhando yeboiler ane zvinodiwa zvakakosha pakuita basa racho.

Kupisa kunotenderedza kana kuburitsa mvura inopisa: kushanda zvakanaka kwekugadzira, kukura kwakafara, pamusoro pemvura ine oxide scale. Yakakodzera machubhu emadziro akakora akadai semisoro nemapombi makuru emhepo.

Kudhirowa kunotonhora kana kutenderedzwa kunotonhora: kunyatsojeka kwepamusoro (kusvika pakuwedzera kana kubvisa 0.05 mm), nzvimbo yakatsetseka. Yakakodzera machubhu madiki, matete emadziro akadai se superheater uye reheater serpentine coils.

Kudhirowa kunotonhora nekupisa kwakajeka: kuchena kwemukati kwakanyanya, hapana oxide scale. Yakakodzera machubhu emvura anodzvinyirirwa zvakanyanya uye machubhu emidziyo chaiyo.

Nekuda kwehuwandu hwadzo hwakawanda hwe alloy, simbi dzeCr Mo dzinoda kudzora zvakanyanya tembiricha yekupisa uye mwero wekushanduka kwechinhu panguva yekuputira kana kupisa kuti dzisatsemuke kana kusavepo kwechimiro chakafanana.

4. Kupatsanurwa nedhayamita yekunze uye ukobvu hwemadziro

Chikamu
Dhayamita yekunze (mm)
Ukobvu hwemadziro (mm)
Kushandiswa kwakajairika

Chubhu diki ine dhayamita
16 kusvika 89
2 kusvika ku8
macoil ekugadzira superheater uye reheater serpentine

Chubhu yedhayamita yepakati
89 kusvika 219
6 kusvika 25
machubhu ekudzikisa pasi uye ekubatanidza

Chubhu yakakura kwazvo
219 kusvika 610
20 kusvika 60
misoro nemapombi makuru emhepo

5. Kurongwa neAppliable Standard

Misika yakasiyana yekutengesera kunze kwenyika inoda masisitimu akasiyana-siyana.

Standard yechiChinese: GB/T 5310, mamakisi akadai se15CrMoG, 12Cr1MoVG, 12Cr2MoG.

Chiyero cheAmerica: ASTM A213 yedhayamita diki, A335 yedhayamita hombe, mamakisi akadai seT11, T22, T91, P11, P22, P91.

Muyero weEurope: EN 10216-2, mamakisi akadai se13CrMo4-5, 10CrMo5-5, X10CrMoVNb9-1 (yakaenzana neT91).

Chimiro cheGerman: DIN 17175 (yakatsiviwa neEN asi ichiri kushandiswa kumapurojekiti ekare), magiredhi akadai se13CrMo44, 10CrMo910.

Muyero wepasi rose: ISO 9329-2, mamakisi anoenderana.

6. Kurongwa neMamiriro Ekutumira

Mamiriro ekuendeswa kwemachubhu eCr Mo anokanganisa zvakananga mashandiro avo.

Yakajairwa uye yakapfava (N pamwe neT): kugadzika kunoteverwa nekugadzika tembiricha yepamusoro. Inoshandiswa pamachubhu mazhinji eCr Mo akadai se15CrMoG uye 12Cr1MoVG.

Zvakajairwa (N): kugadziriswa chete. Kunoshandiswa pamashandisirwo asina kukosha pakukanganiswa nekupisa kwakaderera.

Yakadzimwa uye yakapfava (Q pamwe chete naT): kudzima kunoteverwa nekudzikamisa. Inoshandiswa pakusimbisa kwakasimba uye kusimba kwakanyanya, semuenzaniso mamwe T91 neP91.

Mushonga wakagadziriswa (S): unopiswa kusvika pakupisa kwakanyanya wobva watonhodzwa nekukurumidza. Unoshandiswa pamachubhu eCr Mo asina kusimba akadai seTP347H (ane Cr asi kwete simbi yeCr Mo yakajairika).