ʻO nā kumu a me nā ana pale ʻana o ka ʻino haʻahaʻa wela o nā mea hana mahu

He aha ka boiler haʻahaʻa wela corrosion?

Ua kapa ʻia ka ʻino ʻana o ka ʻakika Sulfuric ma ka ʻaoʻao wela hope o ka paila (economizer, air preheater) ʻo ka corrosion haʻahaʻa haʻahaʻa no ka mea haʻahaʻa ke kinoea a me nā wela o ka pā ma ka ʻaoʻao wela hope.Ma hope o ka ʻino ʻana o ka wela haʻahaʻa i loko o ka paipu economizer, hiki mai ka leakage i loko o kahi manawa pōkole, e hōʻike ana i nā pilikia palekana.ʻO ka hoʻopaʻa ʻana i ka umu no ka hoʻoponopono ʻana e hoʻonui i ka pohō waiwai.

ʻO ke kumu nui o ka corrosion haʻahaʻa wela o nā paila

Hoʻopau ʻia ka sulfur i loko o ka wahie e hana i ka sulfur dioxide (S+02=SO2).ʻO ka sulfur dioxide i hoʻoheheʻe ʻia ma lalo o ka hana a ka mea hoʻoheheʻe e hana i ka sulfur trioxide (2SO2+02=2S03).ʻO SO3 a me ka mahu wai i loko o ke kinoea puhi e hoʻohua ai i ka mahu ʻakika sulfuric (SO3+H2O =H2SO4).ʻO ka loaʻa ʻana o ka sulfuric acid e hoʻonui nui i ka hau o ke kinoea puhi.Ma muli o ka haʻahaʻa o ka ea wela o ka ea preheater, ʻaʻole kiʻekiʻe ka mahana o ke kinoea flue ma ka ʻāpana preheater, a ʻoi aku ka haʻahaʻa o ka pā ma mua o ka wahi hau hau.Ma kēia ala, e hoʻokuʻu ai ka sulfuric acid vapor ma luna o ka ʻili mehana o ka ea preheater, e hoʻoneʻe ai i ka sulfuric acid corrosion.Hiki pinepine ka ʻino haʻahaʻa haʻahaʻa i nā preheaters ea, akā ke kiʻekiʻe ka sulfur maʻiʻo i loko o ka wahie, nui ka nui o ka ea coefficient, kiʻekiʻe ka maʻiʻo SO3 i ke kinoea flue, piʻi ka dew acid, a ʻoi ka mahana o ka wai hānai. haʻahaʻa (ua hoʻopau ʻia ka turbine i ka wela kiʻekiʻe ), hiki i ka paipu economizer ke loaʻa i ka ʻino haʻahaʻa haʻahaʻa.

ʻO ka pahu hoʻoheheʻe haʻahaʻa wela wela

Ua hoʻohana ʻia ka paila moe wai hoʻoheheʻe ʻia o kahi hui no ka liʻiliʻi ma mua o hoʻokahi makahiki, a ʻo nā paipu he nui o ka paipu economizer haʻahaʻa i loaʻa i ka perforations a me ka hū.ʻO ka wahie boiler kahi hui ʻana o ka lanahu bituminous a me ka sludge, ʻo ka mea economizer tube he 20 kila (GB/T 3087-2008), a ʻoi aku ka haʻahaʻa o ka economizer inlet ma mua o 100 ° C.

ʻO nā kumu o ka perforation a me ka leakage o ka economizer paipu ua kālailai ʻia ma o ka haku mele ʻana, mechanical property test, metallographic analysis, scanning electron microscope morphology and energy spectrum analysis, X-ray diffraction phase analysis, etc. hana ma kahi haʻahaʻa haʻahaʻa, a ʻo nā huahana corrosion he nui nā mea S a me Cl.ʻO ka paia o waho o ka pahu economizer e pilikia ana i ka palaha haʻahaʻa ma lalo o ka hana haʻahaʻa haʻahaʻa a me ka corrosion acid i ka wā o ka pani ʻana, e alakaʻi ana i ka mālama lanahu.Ua ʻino ʻia ka paipu, ua ʻāʻī a ua kahe.

Nā hana pale ʻino haʻahaʻa wela
1. E hoʻonui i ka wela o ka pā o ka paipu preheater ea i ʻoi aku ka kiʻekiʻe o ka pā ma mua o ka wahi hau hau.
2. Hoʻohui i nā mea hoʻohui i ke kinoea puhi e hoʻokaʻawale iā SO3 a pale i ka hana ʻana o ka sulfuric acid vapor.3. E hoʻohana i nā mea pale ʻino haʻahaʻa haʻahaʻa no ka hana ʻana i nā ea preheaters a me nā economizers.
4. E hoʻohana i ka hoʻoheheʻe haʻahaʻa-oxygen e hōʻemi i ka nui o ka oxygen i loko o ke kinoea flue a pale a hoʻemi i ka hoʻololi ʻana o SO2 i SO3.
5. Ma kaʻikeʻana i ka mahana o ka hau waika, hiki keʻike ponoʻia ka waiʻawaʻawa ma lalo o kekahi mauʻano hana, a laila e hoʻololi i ka mahana wela o ke kinoea e loaʻa ai nā kūlana maikaʻi loa no ka mālamaʻana i ka ikehu a me ka hoʻonuiʻana i ke ola o ka paila.