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1、技求縱簟周登?。河吞餆犭姀S注汽鍋爐爐管腐蝕因素分析與控制措施油田熱電廠注汽鍋爐爐管腐蝕因素分析與控制措施周登印摘要:大慶油田熱電廠注汽鍋爐爐管處于高溫、高壓的惡劣環(huán)境工況,腐蝕嚴(yán)重,其腐蝕類型主要為堿腐蝕、溶解氧腐蝕、氣蝕、汽水腐蝕和停爐腐蝕。由介質(zhì)產(chǎn)生的腐蝕因素主要有溫度、流速及水處理質(zhì)量;注汽鍋爐爐管中存在的氧氣以及鍋爐水中溶解的氧加速了爐管腐蝕速率。為延緩腐蝕并減小腐蝕程度,提出以下對(duì)應(yīng)的控制措施:嚴(yán)把水質(zhì)源頭管控,杜絕出現(xiàn)不達(dá)標(biāo)水質(zhì)進(jìn)入鍋爐;完善運(yùn)行參數(shù),防止超溫、超壓環(huán)境出現(xiàn);將多種除氧方法結(jié)合使用,以達(dá)到最佳除
2、氧效果。停爐后采用TH901法在爐管表面形成保護(hù)膜以隔離氧氣,該保護(hù)法加藥量少,成本低,阻止腐蝕的概率達(dá)到99.9%以上。通過控制鍋爐給水水質(zhì),減少鍋爐接觸氧幾率等措施,減緩了注汽鍋爐爐管的腐蝕。關(guān)鍵詞:油田熱電廠;注汽鍋爐;爐管;腐蝕機(jī)理;控制措施Doi:10.3969/j.issn.1006—6896.2016.2.027CorrosionFactorsAnalysisandControlMeasuresofBoilerTubesinSteamIn.jectionBoilerinthe0ilfieldZhouDengy
3、inAbstract:ThesteaminjectionboilerfumacetubeofDaqing0i/fieldthermalpowerplantisinhightemperature.highpressureandotherharshenvironmentalconditions.Thecorrosiontypesaremainlyalkalicorrosion,dissolvedoxygencorrosion,cavitationerosion,steamwa—tercorrosionandstopfumace
4、corrosion.Thecorrosionfdctorsproducedbythemediummainlyincludetemperature,flowrateandwatertreatmentquality.Thedissolvedoxygenintheoxygen,andtheboilerwaterinthesteaminjectionboilerfumace,thathaveacceleratedthecorrosionrateofthefumacetubes.0nthebasisofcorrosionfactor
5、stargetedresearch.fromthecontrolofboilerfeedwaterquality,reduceboileroxygenexposureprobabilityandimprovethefumacepipeanti—corrosionpropertiesoftheessence,~ouraspects:theuseofscienceandtechnology,andputsforwardthecorrespondingcontrolmeasures.a(chǎn)imingtode—layandreduce
6、thecorrosionofallaspects,topreventcorrosionoftheprobabilityofmorethan99.9%.Bycontrollingthewaterqualityofboilerandreducingthechanceofcontactwithoxygen,thecorrosionofboilertubesisreduced.KeyWOrds:oilfie/dtherma[powerplant;steaminjectionboiler;f'umacetube:corrosionm
7、echanism:controlmeasures大慶油田熱電廠是隨著大慶油田5000萬噸高過渡段、對(duì)流段和輻射段組成,三段爐管處于高產(chǎn)而興建的電廠。熱電廠注汽鍋爐是發(fā)電供熱的主溫、高壓的惡劣環(huán)境,腐蝕嚴(yán)重。要設(shè)備,也是保證油田生產(chǎn)正常運(yùn)營的關(guān)鍵設(shè)備。為有效控制大慶油田熱電廠鍋爐爐管腐蝕損隨著油田發(fā)展規(guī)模的增大和用電用熱的加大,注汽壞,對(duì)爐管腐蝕機(jī)理和腐蝕影響因素進(jìn)行深入地分鍋爐爐管和注汽管線的腐蝕也越來越嚴(yán)重,甚至發(fā)析,并提出科學(xué)有效的控制措施,以緩解和控制熱生鍋爐爐管破裂和停機(jī),不但造成巨大的經(jīng)濟(jì)損電廠鍋爐爐管腐蝕,從而
8、降低油田熱電廠發(fā)電供熱失,安全生產(chǎn)也得不到有效保障。注汽鍋爐爐管由生產(chǎn)成本。大慶油田熱電廠84油氣田地面工程http://www.yqtdmgc.COITI第35卷第2期(2016.02)技術(shù)縱麓發(fā)生反應(yīng)產(chǎn)生的Fe。0容易在金屬表面形成鼓包,1腐蝕機(jī)理導(dǎo)致潰瘍腐蝕。鍋爐主要運(yùn)行介質(zhì)是水,水質(zhì)不達(dá)標(biāo)容易導(dǎo)