Yuav ua li cas ntxuav lub PTFE Thaum tshav kub kub Exchanger yam tsis muaj kev puas tsuaj

Kev poob siab ntawm PTFE kub exchanger nce 30% tom qab siv lub hlis thiab qhov hluav taws xob kub poob. Muaj scale ntawm lub raj nto. Kev tu tshuab yog qhov txaus ntshai tiag tiag yog li kev ntxuav tshuaj lom neeg (CIP) yog qhov kev daws teeb meem. Tab sis siv cov tshuaj tsis raug lossis kub thiab koj tuaj yeem ua rau PTFE puas. Nov yog yuav ua li cas ntxuav kom nyab xeeb thiab zoo. Vim li cas Kev Tu Tshuaj Zoo dua PTFE cov khoom siv hluav taws xob ua kom sov yog tsim rau cov xwm txheej hnyav thiab yog qhov tsim nyog rau kev huv huv - hauv - Qhov chaw (CIP) kev ua haujlwm vim tias lawv cov tshuaj tsis haum. Kev tu tshuaj (tsis muaj kev puas tsuaj rau lub cev) tshem tawm cov khoom pov tseg, thaum lub tshuab ntxhua khaub ncaws tuaj yeem ua puas lossis deform PTFE qhov chaw. Tab sis tshuaj tiv thaiv tsis tau txhais hais tias tshuaj tiv thaiv kab mob. PTFE tiv taus rau feem ntau cov kua qaub, cov hauv paus, thiab cov kuab tshuaj, tab sis tej zaum yuav degraded nyob rau lub sij hawm los ntawm qee cov tshuaj lom neeg, tshwj xeeb tshaj yog los ntawm muaj zog oxidising acids ntawm kub kub, nrog rau fuming nitric acid los yog molten alkali. PTFE yog qhov muaj zog, tab sis nws muaj kev txwv -- hwm daim ntawv qhia txog tshuaj lom neeg ua ntej xaiv cov tshuaj ntxuav. Exchanger Isolation and Preparation Thawj kauj ruam ntawm cov txheej txheem ntxuav yog tsim nyog cais. Lub exchanger yuav tsum raug cais tawm ntawm tus txheej txheem kom tsis txhob muaj kev sib kis thiab ua kom cov neeg siv kev nyab xeeb. Tshem tawm lub plhaub sab thiab lub raj sab nkaus, suav nrog cov txheej txheem ua kua dej. Kev rho tawm li qub yuav tsum tau muab xauv tawm thiab kaw cov kaw yog tias tsim nyog, kom ntseeg tau tias tsis muaj kev tawm tsam ntawm cov txheej txheem kev tshaj tawm thaum lub sijhawm ntxuav. Cov theem no teeb tsa theem rau cov tshuaj ntxuav kom ntws zoo hauv qhov chaw tswj hwm. Xaiv tus neeg saib xyuas kom raug Qhov kev vam meej ntawm CIP feem ntau yog nyob ntawm qhov sib txuam ntawm cov tshuaj ntxuav tu rau hom fouling tam sim no. Cov deposits nyob rau hauv tshav kub exchangers feem ntau muab faib ua peb hom: ntxhia nplai, organic fouling thiab kev loj hlob lom. Cov kua qaub me me tau yooj yim yaj cov ntxhia pob zeb xws li calcium carbonate lossis hlau oxides . 5-10% cov kev daws teeb meem ntawm citric acid lossis acetic acid feem ntau siv, vim tias lawv siv tau zoo thiab tib lub sijhawm me me rau PTFE thiab lwm yam khoom siv. Organic deposits xws li roj, roj los yog polymer residues yuav tsum tau alkaline cleansing. Cov tshuaj yog decomposed zoo nrog ib tug tov ntawm caustic soda (1-2%) los yog nrog ib tug npaj alkaline detergent. Biological fouling, xws li biofilms lossis microbial kev loj hlob tuaj yeem xav tau cov tshuaj oxidising, xws li cov tshuaj dawb tsis muaj zog lossis hydrogen peroxide. Hauv qhov xwm txheej zoo li no, kev ntsuas kev sib raug zoo yog qhov tsim nyog, vim tias cov oxidisers tuaj yeem cuam tshuam tsis yog PTFE nkaus xwb tab sis kuj tseem muaj cov gaskets thiab cov khoom ntxiv. Ua Cov Tshuaj Ntxuav Xaiv cov tshuaj uas cuam tshuam thiab ua kom cov tshuaj ntawm qhov xav tau concentration thiab kub. Qhov kub thiab txias yog qhov tseem ceeb hauv kev tu kom zoo, tab sis nws yuav tsum tau tswj xyuas nrog kev saib xyuas. Rau cov khoom siv hluav taws xob sib hloov hauv PTFE qhov kev tu qhov kub thiab txias yog 40-60℃. Qhov no muab cov tshuaj lom neeg txaus uas tsis ua rau muaj kev ntxhov siab hnyav heev. Qhov kub ntawm kev ntxuav yuav tsum tsis txhob siab tshaj 80 degree, txij li thaum lub sij hawm ntev raug rau qhov kub thiab txias yuav ua rau kom cov pace ntawm degradation ntawm cov khoom. Cov tshuaj yuav tsum tau muab sib xyaw kom zoo thiab muab tso rau hauv lub voj voog CIP siab kom cov concentration zoo ib yam thoob plaws hauv qhov huv. Circulation and Cleaning Procedure Ib lub twj tso kua mis CIP yuav tso cov tshuaj ntxuav tawm los ntawm ib sab ntawm lub exchanger uas cuam tshuam, xws li lub plhaub sab los yog lub raj sab. Tus nqi ntws yog qhov tseem ceeb. Qhov kev tshaj tawm yuav tsum muaj siab txaus kom ua rau muaj kev kub ntxhov uas txhawb kev sib cuam tshuam ntawm cov tshuaj lom neeg thiab cov fouling txheej, tab sis tsis siab dhau los ua kom muaj kev ntxhov siab. Feem ntau, cov dej ntws yuav tsum tau khaws cia hauv qab li ntawm 2 m / s kom tsis txhob muaj lub raj vibration lossis kev puas tsuaj. Qhov ruaj khov, tswj kev khiav dej num muab kev tu kom zoo yam tsis muaj kev cuam tshuam rau kev ncaj ncees ntawm kev sib hloov. Lub sij hawm ntxuav yog nyob ntawm seb qhov fouling. Lub teeb tso nyiaj tuaj yeem raug tshem tawm hauv tsawg li ib teev. Kev hnyav hnyav tuaj yeem siv ntev li plaub teev ntawm kev ncig. Kev saib xyuas yog qhov tseem ceeb nyob rau theem no. Qhov kev hloov ntawm qhov kev poob siab ntawm qhov sib pauv yuav qhia tau tias qhov kev nce qib, raws li qhov poob ntawm qhov tsis kam qhia txog kev sib cais ntawm cov nyiaj tso cia. Qee zaum, ib qho piv txwv ntawm cov tshuaj ntxuav tuaj yeem muab cov ntaub ntawv ntxiv. Koj tuaj yeem tshawb xyuas tias fouling tau raug tshem tawm los ntawm kev nce ntawm cov khoom tawg lossis hloov xim. Yaug & Neutralize Thaum kawg ntawm lub voj voog tu lub exchanger yuav tsum tau emptied thiab yaug kom zoo. Tom qab ntawd cov dej ntshiab-xws li deionised dej-yog circulated kom tshem tawm cov seem ntawm cov tshuaj ntxuav. Yaug kom txog thaum cov dej ntws tawm ntawm nruab nrab pH. Cov kauj ruam no tseem ceeb heev. Txhua cov kua qaub lossis alkali tshuav nyob rau hauv lub exchanger tuaj yeem tua cov khoom siv hauv qab los yog cuam tshuam nrog kev ua haujlwm thaum lub kaw lus rov pib dua. Yaug mus rau qhov nruab nrab ph. Residual cleanser yog qhov kev hem thawj zais. Kev pov thawj yog qhov kev lees paub tias cov txheej txheem ntxuav tau ua tiav nws lub hom phiaj. Txoj kev muaj txiaj ntsig tshaj plaws yog los saib xyuas qhov txo qis ntawm qhov sib pauv thiab sib piv nrog cov txiaj ntsig hauv qab. Kev rov qab mus rau qhov kev poob siab ib txwm qhia tias cov kev txwv ntws tau raug tshem tawm. Ib lub borescope tuaj yeem siv los kuaj pom hauv cov hlab rau kev tshuaj xyuas ntau dua. Qhov no tshwj xeeb tshaj yog muab rau hauv cov ntawv thov tseem ceeb uas xav tau kev huv huv tag nrho. Yog tias qhov kev ua tau zoo tsis tau rov qab tag nrho, yuav tsum muaj lub voj voog tu thib ob. Hnyav lossis sib xyaw fouling yuav xav tau ob kauj ruam ntawm kev ntxuav cov kua qaub thiab ua raws li kev ntxuav alkaline. Kev txiav txim siab txog kev nyab xeeb Kev siv tshuaj ntxuav tu yuav tsum tau ua raws li cov cai tswj kev nyab xeeb. Cov neeg ua haujlwm yuav tsum hnav cov khoom tiv thaiv tus kheej kom zoo nrog rau cov hnab looj tes tiv thaiv tshuaj, tsom iav kev nyab xeeb thiab acid resistant aprons. Qhov cua yuav tsum tsim nyog los tiv thaiv kev tsim cov pa taws, tshwj xeeb tshaj yog thaum cuam tshuam nrog cov tshuaj tsis haum lossis oxidising. Cov khoom siv tau yooj yim yuav tsum yog cov khoom txeej thiab cov khoom siv tsis zoo thaum muaj xwm ceev. Kev siv tshuaj ntxuav tes yuav tsum tau ua kom tsis zoo ua ntej muab pov tseg ua raws li cov cai hauv cheeb tsam ib puag ncig. Kev tuav pov hwm kev nyab xeeb thiab cov ntaub ntawv tsim nyog ua kom muaj kev ua raws cai thiab kev nyab xeeb. Restoring Performance Un Doing Damage Chemical cleaning is preferable over mechanical cleaning for PTFE heat exchangers kom tshem tawm cov deposits los tiv thaiv txhua yam hnav. Thaum siv tau zoo, CIP yuav txhim kho cov hluav taws xob hloov hluav taws xob, txo qis qis thiab ua kom lub neej ntev ntawm cov cuab yeej siv. Txoj kev tswj hwm - xaiv cov tshuaj raug cai, tswj qhov kub thiab txias, thiab ua kom huv si tiv thaiv PTFE thaum muab kev tu zoo. Los ntawm kev ua raws li kev qhuab qhia, cov neeg ua haujlwm saib xyuas yuav muaj kev nyab xeeb tshem tawm cov fouling thiab rov ua kom lub exchanger ua haujlwm zoo yam tsis muaj kev pheej hmoo ntawm kev puas tsuaj.