Pehea e koho ai i nā pono kiwikā ma lalo o ke kūlana wela kiʻekiʻe

I loko o ka ʻōnaehana hoʻoili wai, ʻo ka kiwikā he mea nui ia e pono ai ka mana, ʻo ia ka nui o nā hana o ka hoʻoponopono, hoʻololi, anti-backflow, ʻoki a me shunt. Hoʻohana ākea ka kiwikā i nā hana ʻoihana a me nā kīwila. ʻO ka kiwikā wela kiʻekiʻe kahi ʻano i hoʻohana mau ʻia i nā kiwikā. ʻO kāna mau pono kikoʻī e like me kēia: hana i ke kinai maikaʻi ʻana, hiki ke hana i ke kinai hohonu ʻana; maikaʻi paʻa; ka hopena maikaʻi o ka hopena, paʻakikī e hōʻino iā ia e ka hana ʻino; ʻOi aku ka liʻiliʻi o ka mahana brittleness a pēlā aku. Aia kekahi mau ʻano o nā kiwikā wela kiʻekiʻe. ʻO ka mea maʻamau ka wela kiʻekiʻekiwikā pepeiao, wela-kiʻekiʻe kiwikā poepoe, nā kānana wela kiʻekiʻe, a me ka mahana wela kiʻekiʻe puka kiwikā.

ʻO nā kiwikā o nā pāmahana kiʻekiʻe me nā kiwikā o ka puka pāmahana kiʻekiʻe, nā kiwikā pani pā kiʻekiʻe, nā kiwikā o nā pā pōhaku kiʻekiʻe, nā kiwikā butterfly mehana kiʻekiʻe, nā kiʻina kiki wela wela kiʻekiʻe, a me kaomi wela kiʻekiʻe e hoʻemi ana i nā kiwikā. I waena o lākou, ʻo nā mea i hoʻohana mau ʻia he mau kiwikā o ka ʻīpuka, nā nohona poepoe honua, nā kiwikā o nā poepoe, nā kiʻikuhi poepoe a me nā kiʻekiʻena butterfly

ʻO nā kūlana hana wela nui e hoʻopili pū me ka mahana wela kiʻekiʻe, mahana wela Ⅰ, kiʻekiʻe wela Ⅱ, mahana kiʻekiʻe Ⅲ, kiʻekiʻe mahana Ⅳ, a me ke kiʻekiʻe wela which, e hoʻolauna ʻokoʻa ʻia ma lalo.

Industry

1. Mahana kiʻekiʻe

ʻO ka mahana wela kiʻekiʻe ke ʻano o ka mahana hana o ka valve ma ka ʻāina o 325 425. Inā ʻo ka medium ka wai a me ka mahu, WCB, WCC, A105, WC6 a me WC9 e hoʻohana nui ʻia. Inā ka aila i loko o ka ʻaila sulfur, C5, CF8, CF3, CF8M, CF3M, a me nā mea ʻē aʻe, kūpaʻa i ka corrosion sulfide, hoʻohana nui ʻia. Hoʻohana nui ʻia lākou i ka lewa a me ka hoʻohaʻahaʻa hoʻohaʻahaʻa ʻana i nā hāmeʻa a hoʻolohi ʻia i nā hāmeʻa coking i nā refineries. I kēia manawa, ʻaʻole hoʻohana nā kiwikā i hana ʻia me CF8, CF8M, CF3 a me CF3M no ke kūpaʻa kūpaʻa o nā waikawa waikawa, akā hoʻohana ʻia no nā huahana aila i loaʻa i ka sulfur a me nā paipu ʻaila a me nā aila. I kēia kūlana, ʻo ka mahana hana ʻoi loa o CF8, CF8M, CF3 a me CF3M he 450 ° C.

 

2. Ke kiʻekiʻe wela Ⅰ

Ke 425 ka mahana hana o ka nohona 550 ℃, he papa wela kiʻekiʻe wau (i kapa ʻia ʻo ka papa PI). ʻO ka mea nui o ke kiʻekiʻena papa PI ʻo ia ka "wela wela" medium papa waena kalapona chromium nickel laha honua titanium kiʻekiʻe kiʻekiʻe wela-hoʻopale kila "me CF8 e like me ke kumu kinona ma ASTMA351 hae. Ma muli o ka inoa PI kahi inoa kūikawā, hoʻokomo ʻia ka manaʻo o ke kila wela kiʻekiʻe (P) ma aneʻi. No laila, inā he wai a mahu paha ka mea hana, ʻoiai ʻo WC6 (t≤540 ℃) ke kila wela kiʻekiʻe a hiki i ka WC9 (t≤570 ℃) ke hoʻohana pū ʻia, ʻoiai hiki ke hoʻohana ʻia nā huahana ʻaila sulfur i loaʻa ke kila wela kiʻekiʻe. C5 (ZG1Cr5Mo), akā ʻaʻole hiki iā lākou ke kapa ʻia he papa PI ma aneʻi.

 

3. Mahana kiʻekiʻe II

ʻO ka mahana hana o ka paila ʻo 550 650 ℃, a ua hoʻohālikelike ʻia ʻo ia me ke kiʻekiʻe wela Ⅱ (i kapa ʻia ʻo P Ⅱ). PⅡ papa kiʻekiʻe wela kiwikā e hoʻohana nui ʻia i ka aila kaumaha catalytic cracking hāmeʻa o ka hana hoʻomālamalama. Loaʻa iā ia ke aniani kiʻekiʻe o ka pale o ka puka o ka pale o ka puka i hoʻohana ʻia i ka noz huli ʻekolu a me nā ʻāpana ʻē aʻe. ʻO ka mea nui o ke kiʻekiʻena papa PⅡ he "kiʻekiʻe wela" Ⅱ papa waena o ke kalapona chromium nickel rare honua titanium tantalum i hoʻokūpaʻa ʻia i ke kila hoʻopale wela "me CF8 ma ke ʻano maʻamau o ka hae ASTMA351.

 

4. Ke kiʻekiʻe wela III

ʻO ka mahana hana o ka valve he 650 730 ℃, a hoʻohālikelike ʻia ʻo ia me ke kiʻekiʻe wela III (i kapa ʻia ʻo PⅢ). PⅢ papa kiʻekiʻe wela kiwikā e hoʻohana nui ʻia i ka nui o nā aila kaumaha catalytic cracking unit i nā refineries. ʻO ka mea nui o ka pahū kiʻekiʻe kiʻekiʻe papa PⅢ ka CF8M i hoʻokumu ʻia ma ASTMA351.

 

5. Ke kiʻekiʻe wela Ⅳ

ʻO ka mahana hana o ka valve he 730 816 ℃, a ua helu ʻia ʻo ia me ke kiʻekiʻe wela IV (i kapa ʻia ʻo PIV no ka pōkole). ʻO ka palena kiʻekiʻe o ka mahana hana o ka PIV kiwikā ʻo 816 ℃, no ka mea ʻo ke kiʻekiʻe wela i hāʻawi ʻia e ka standard ASMEB16134 pressure-temperature grade i koho ʻia no ka hoʻolālā kiwikā ʻo 816 ℃ (1500υ). Eia hou, ma hope o ka mahana o ka hana i ʻoi aku ma mua o 816 ° C, kokoke ke kila i ke komo ʻana i ka māhele wela o ka forging. I kēia manawa, aia ka metala i ka ciona deformation ea, a he palekiko maikaʻi ka metala, a paʻakikī e kū i ke kaomi hana kiʻekiʻe a me ka hopena hopena a mālama iā ia mai ka deforming. ʻO ka mea nui o ka pahū P Ⅳ ʻo CF8M i ke kūlana ASTMA351 e like me ke ʻano o ke ʻano “kiʻekiʻe mehana Ⅳ waena kalapona chromium nickel molybdenum rare honua titanium tantalum hoʻoikaika ikaika wela-hoʻopale kila”. ʻO CK-20 a me ASTMA182 F310 maʻamau (me ka ʻike C ≥01050%) a me ka F310H kila kila hoʻopale wela.

 

6, kiʻekiʻe wela Ⅴ

ʻOi aku ka kiʻekiʻe o ka mahana hana ma mua o 816 ℃, i kapa ʻia ʻo PⅤ, P valve kiwikā wela kiʻekiʻe (no nā kiwikā paʻa, ʻaʻole e hoʻokele i nā kiwikā o nā pēpē) pono e hoʻohana i nā ʻano hoʻolālā kūikawā, e like me ka uhi ʻana i ka uhi a i ʻole ka wai a me ka ʻenekini Ke anuanu hiki hōʻoia i ka maʻamau hana o ka nohona kiwikā. No laila, ʻaʻole i kuhikuhi ʻia ka palena kiʻekiʻe o ka mahana hana o ka papa PⅤ kiʻekiʻe o ka mahana, no ka mea, ʻaʻole i hoʻoholo wale ʻia ka mahana hana o ka kiwikā e nā mea, akā na nā ʻano hoʻolālā kūikawā, a me ke kumu kumu o ke ʻano hoʻolālā. mea like. Hiki i ke kiʻekiʻena pāmahana kiʻekiʻe P choose ke koho i nā pono kūpono i hiki ke hālāwai i ka kiwikā e like me kāna ʻano hana a me ka hana hana a me nā hana hoʻolālā kūikawā. I ke kiʻekiʻena PⅤ papa kiʻekiʻena wela, ʻo ka maʻamau ka flapper a i ʻole ka pulupulu lele o ke kiwikā flue flapper a i ʻole valve butterfly e koho maʻamau ʻia mai HK-30 a me HK-40 mau aniani kiʻekiʻe-wela i ke kūlana ASTMA297. Kūpono ka popopo, akā ʻaʻole hiki ke kū i ka haʻalulu a me nā kaumaha nui.


Ka manawa Post: Jun-21-2021