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-akpatakwa 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, acid igirigi na-ebili, na nri mmiri okpomọkụ bụ. ala (a na-agbanyụ turbine na okpomọkụ dị elu), tube economizer nwekwara ike ịta ahụhụ site na mmebi nke obere okpomọkụ.

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.

A na-enyocha ihe kpatara perforation na ntapu nke tube economizer site na nyocha ihe mejupụtara, nyocha n'ibu, nyocha metallographic, nyocha eletrọn microscope morphology na nyocha ụdị ume dị iche iche, nyocha X-ray diffraction, wdg. Nnyocha ahụ chọpụtara na economizer tube. na-arụ ọrụ na obere okpomọkụ, na ngwaahịa corrosion nwere nnukwu ihe S na Cl. 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 a na-emebi emebi, gbajiri ma na-agbapụta.

Usoro mgbochi corrosion dị ala
1. Mee ka mgbidi mgbidi dị elu nke ikuku preheater tube nke mere na mgbidi ahụ dị elu karịa ebe ikuku ikuku ikuku.
2. Tinye mgbakwunye na flue gas iji kpochapụ SO3 ma gbochie ọgbọ nke sulfuric acid vapor. 3. Jiri obere okpomọkụ na-eguzogide corrosion na-eme ka ikuku preheaters 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.