Yuav ua li cas tswj thiab ntxuav stainless hlau tshav kub exchangers?

Stainless hlau kub exchangers yuav tsum tau tu thiab tu. Feem ntau, lub lim dej ntxhib tau teeb tsa rau ntawm qhov dej txias thiab kub qhov hluav taws xob los tiv thaiv 3-5 hli cov khoom los thaiv cov phaj channel. Thaum lub siab sib txawv ua ntej thiab tom qab lub lim yog loj, lub lim tuaj yeem disassembled rau kev ntxuav. Yog tias kev tu ntau dhau lawm, cov khoom siv hluav taws xob stainless hlau tuaj yeem ua tsis tiav vim qhov thaiv ntawm cov phaj channel. Cov txheej txheem descaling yuav tsum tau ua rau stainless hlau tshav kub exchangers muaj xws li cov hauv qab no:
1) Pickling txoj kev thiab lub sij hawm: Pickling txoj kev yuav tsum yog ib tug ua ke ntawm static soaking thiab dynamic cycling. Lub sij hawm pickling yog static soaking rau 2 teev, ua raws li dynamic cycling rau 3-4 teev. Thaum lub sij hawm cov txheej txheem pickling, cov qauv yuav tsum tau siv ntau zaus los ntsuam xyuas cov pickling concentration. Thaum qhov sib txawv ntawm qhov kev ntsuam xyuas nyob ib sab tsawg dua 0.2 feem pua, cov tshuaj tiv thaiv tuaj yeem suav hais tias ua tiav.
2) Kev kho mob Passivation: Tom qab ntxuav cov kua qaub, feem ntau ntawm cov nplai thiab cov hlau oxides nyob rau saum npoo ntawm lub phaj kub exchanger yaj thiab poob tawm, nthuav tawm cov hlau tshiab uas muaj feem xyuam rau corrosion. Yog li ntawd, tom qab pickling, daim hlau ntawm stainless hlau tshav kub exchanger yog passivated.
3) Pickling kub: nce qhov kub ntawm pickling yog qhov zoo rau kev txhim kho cov nyhuv descaling. Yog tias qhov kub thiab txias dhau lawm, qhov corrosion ntawm cov tshuaj pickling ntawm lub phaj kub exchanger yuav intensified. Los ntawm kev sim rov ua dua, nws tau pom tias qhov ntsuas kub yuav tsum tau tswj ntawm 60cC.
4) Acid cleaning solution concentration: Raws li kev sim rov ua dua, cov tshuaj ntxuav cov kua qaub yuav tsum tau npaj ntawm qhov concentration ntawm 81.0 feem pua ​​​​ formic acid, 17%. 0.8 feem pua ​​surfactant. Cov nyhuv ntxuav yog zoo.