Ihe na-akpata na mgbochi mgbochi nke obere okpomọkụ corrosion nke uzuoku generators

Kedu ihe bụ ikuku okpomọkụ corrosion dị ala?

Sulfuric acid corrosion na-eme n'azụ kpo oku elu nke ji esi mmiri ọkụ (economizer, air preheater) na-akpọ obere okpomọkụ corrosion n'ihi na flue gas na tube mgbidi okpomọkụ na n'azụ kpo oku elu ngalaba dị ala. Mgbe corrosion dị ala na-apụta na tube economizer, ntanye nwere ike ime n'ime obere oge, na-ebute ihe egwu nchekwa. Imechi ọkụ maka nrụzi ga-emekwa ka nnukwu mfu akụ na ụba.

Isi ihe na-akpata obere okpomọkụ corrosion nke ji esi mmiri ọkụ

A na-akpọ sọlfọ dị na mmanụ ọkụ ka ọ bụrụ sulfur dioxide (S+02=SO2). A na-eme ka sọlfọ dioxide ọzọ oxidized n'okpuru ọrụ nke ihe na-eme ka ọ bụrụ sulfur trioxide (2SO2+02=2S03). SO3 na ikuku mmiri dị na flue gas na-emepụta vapor sulfuric acid (SO3 + H2O = H2SO4). Ọnụnọ nke sulfuric acid vapor na-abawanye n'ókè igirigi nke flue gas. Ebe ọ bụ na ikuku ikuku dị na preheater ikuku dị ala, ikuku ọkụ na-ekpo ọkụ na mpaghara preheater adịghị elu, na mgbidi mgbidi na-adịkarị ala karịa ebe ikuku gas na-ekpo ọkụ. N'ụzọ dị otú a, sulfuric acid vapor ga-agbakọta n'elu ikpo ọkụ nke ikuku preheater, na-eme ka sulfuric acid corrosion. Obere okpomọkụ corrosion na-emekarị na ikuku preheaters, ma mgbe sulfur ọdịnaya na mmanụ ụgbọala dị elu, ngafe ikuku coefficient bụ nnukwu, SO3 ọdịnaya na flue gas dị elu, na acid igirigi ebili, na nri mmiri okpomọkụ dị ala (na turbine na-deactivated na elu okpomọkụ ), economizer tube nwekwara ike na-ata ahụhụ site na obere okpomọkụ corro.

Okpomọkụ ikpe corrosion dị ala

A na-etinye igwe ọkụ ihe ndina nke ụlọ ọrụ na-ekesa na-arụ ọrụ obere oge maka ihe na-erughị otu afọ, ọtụtụ ọkpọkọ na ọkpọkọ akụ na ụba dị ala na-ata ahụhụ site na perforation na ntapu. Mmanụ na-esi ísì ụtọ bụ ngwakọta nke coal bituminous na sludge, ihe economizer tube bụ ígwè 20 (GB/T 3087-2008), yana ọnọdụ ntinye economizer na-adịkarị ala karịa 100 ° C.

Ihe kpatara perforation na ntapu nke economizer tube e nyochara site ihe mejupụtara analysis, n'ibu Njirimara ule, metallographic analysis, scanning eletrọn microscope morphology na ume ụdịdị dị iche iche analysis, X-ray diffraction frasi analysis, wdg The analysis chọpụtara na economizer tube na-arụ ọrụ na a ala okpomọkụ, na corrosion ngwaahịa nwere nnukwu ego nke S na Cl ọcha. Mgbidi dị n'èzí nke tube economizer na-ata ahụhụ site na obere okpomọkụ corrosion n'okpuru obere okpomọkụ ọrụ na acid corrosion n'oge mmechi, nke n'ikpeazụ na-eduga na coal ịzọpụta. Ọkpụkpọ ahụ na-emebi emebi, gbajiri ma na-agbapụta.

Usoro mgbochi corrosion dị ala
1. Mee ka mgbidi ahụ dịkwuo elu nke ikuku preheater tube nke mere na mgbidi ahụ dị elu karịa ebe ikuku ikuku ikuku.
2. Tinye ihe mgbakwunye na gas flue iji kpochapụ SO3 ma gbochie ọgbọ nke sulfuric acid vapor. 3. Jiri ihe na-eguzogide corrosion na-ekpo ọkụ na-ekpo ọkụ na-eme ka ikuku na-ekpo ọkụ na economizers.
4. Jiri obere ikuku oxygen na-ekpo ọkụ iji belata oke ikuku oxygen na gas flue ma gbochie ma belata ntụgharị nke SO2 n'ime SO3.
5. Site n'ịchọpụta ọnọdụ okpomọkụ nke acid acid, a pụrụ ịmata ebe igirigi acid dị n'okpuru ụfọdụ ọnọdụ ọrụ, si otú ahụ na-edozi okpomọkụ nke ikuku gas iji nweta ọnọdụ kachasị mma maka ịchekwa ike na ịgbatị ndụ nke ọkụ ọkụ.