Hka hpe lang nna heat exchange system hku nna, nbung laru galai ai hka htung ni a ntsa de loi loi hte npu de hkrat wa ai. Descaling hpe aten galu n galaw yang, heat exchange tubes ni a ntsa kaw byin pru wa ai scale gaw grau grau htum mat nna, katsi ai hpe htawt sit ai atsam hpe hkra machyi shangun nna, hkum tsup ai hku nna, hkum tsup ai heat exchangeer hpe hkra machyi shangun na re. Dai majaw a .hkum tsup ai hku katsi ai hpe galai shai ai jak,regular descaling galaw ra ai. Dai majaw, masha law law lang ai descaling ladat ni gaw hpa ni rai kun?
Manual (sh) jak ladat ni. Pipe ni hpe loi mi n-gun n rawng ai sha, n-gun n rawng ai sha, n-gun rawng ai nbung, n-gun rawng ai nbung, n-gun rawng ai hka, hka law ai hka, hka ja na matu steam ni hpe lang nna, lata hte galaw ai ladat (sh) jak rung ladat ni hpe lang nna jasan jaseng mai ai. Pipe ni hpe grai sawng ai hku n-gun n rawng ai (sh) tsep kawp pat da ai shaloi, pipe hka htu ai ( pipe auger ngu nna mung shamying ai) hpe lang mai ai.
Hka lum ai ladat lahkawng nga ai. Shawng nnan na gaw, bungli galaw ai aten (sh) aten kadun laman galaw ai aten hta lang ai, n-gun n rawng ai hka lim ai lam re. Dai jak ni hpe garan kau ra na n re, raitim, nhtang wa ai bypass line hpe pre{2}}}install galaw ra ai. Ndai ladat gaw scaling n grai sawng ai shaloi grau kaja ai. Lahkawng ngu na gaw tsaw ai- hpe hka jet htu ai. N bung ai shingjawng ai hka jet baw ni hpe n bung ai nbung galai ai jak ni a matu lang ai, rigid (sh) n-gun rawng ai, 10 MPa kaw nna 200 MPa kaw nna 10 MPa kaw nna 200 MPa kaw nna galai shai mai ai n-gun ni hpe lang ai. High{10}}} pressure hka jet ni gaw pipe lapran, pipe kata, shell ntsa kaw n san seng ai hpe shapraw kau na matu htuk manu ai. Hpa majaw nga yang, n-gun n-gun galai ai jak ni hpe hka shin ai gaw grai kaja ai hte grai lang ai.
1. Shawng nnan hkyen lajang ai lam (scale arawn alai hte arung arai masa hpe asan sha chye na hkra)
Scale sampling hte sawk sagawn ai lam: Laboratory chyam dinglik ai hku nna madung daw ni hpe dawdan nna, san seng ai ladat hpe lata la na.
Equipment status hpe jep yu u: Heat galai shai ai hka htung ni hpe n-gun n bung ai, hka lim ai (sh) pat da ai kun ngu ai hpe jep yu u, dai hpe pressure gauge shai hkat ai majaw tara jeyang mai ai;
San seng ai masing hpe gyin shalat na: Hpaji sawk sagawn ai lam a mahtai hpe madung tawn nna, san seng ai ladat hpe dawdan nna, lawan ladan galaw na masing hpe gyin shalat na.
2.Cer clean galaw ai ladat: chemical cleaning
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Scale amyu |
Hpaji jaw ai san seng ai arung arai ni |
Htap htuk ai arung arai ni |
sadi maja ai lam |
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Carbonates (80) |
Hydrochloric acid (5%-10% n-gun), citric acid (8%-12%) |
Carbon n-gang, n-gang n-gang |
Hydrochloric acid hpe n-gun n rawng ai lam n byin hkra, n-gun n rawng ai hpe pat shingdang ai (hexiamylenetramine zawn re ai) hte jat bang ra ai; citri acid gaw acid-sensitive arung arai ni a matu htuk manu ai. |
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Sulfate/Silicate (n-gun ja ai) |
10%-15%) + fluoride (auxiliary) |
N-gun n rawng ai n-gang, magri n-gang |
Fluoride n-gun hpe atsawm sha hkang ra ai (2%) hta silica scale hpe n-gun n-jaw hkra makawp maga na matu (2%) hte maren sha rai ra ai. |
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Mixed scale |
Hpa majaw |
Carbon n-gang, n-gang n-gang |
Corrosion hpe ninghkap lu ai atsam hpe jep chyoi na matu kaji kajaw chyam dinglik ra ai (coupon chyam dinglik ai lam: 0.1mm/shaning hte maren (sh) dai hte maren sha re ai n-gun n-gun n-gun n-nga ai) |
3.Hkum hkrang hpe jasan jaseng ai (n-gun n ja ai (sh) hkam sha chye ai arung arai ni a matu htuk manu ai)
Hkum hkrang san seng ai lam gaw chemical agent ni n ra ai sha, scale n law ai (sh) dai arung arai gaw acid- n hkam sharang lu ai scenes ni a matu htuk manu ai. (High- pressure hka jet jasan jaseng ai lam, jak rung kaw na scraper ni hpe jasan jaseng ai lam, ultrasonic hpe jasan jaseng ai lam ni gaw lata la mai ai)
4.Chyu jaw ngut ai hpang hkap la ai hte shani shagu anti-}scaling ladat
San seng ai lam hpe hkap la ai lam (visual jep joi ai lam, bungli galaw ai lam hpe chyam dinglik ai lam)
Daily anti-scaling masat masa ni (scape hpe bai gram lajang na matu, unit a hka shang ai shara kaw hka n-gunener hpe bang da u)
Heat exchange tubes ni hta Scaling galaw ai gaw madung hku nna hka n kaja ai majaw byin pru wa ai, dai gaw scale hte grease byin pru wa ai, dai gaw coking, marang htu ai, n-gun rawng ai hku byin pru wa ai. Chemical descaling ladat ni hta, shawng nnan sawk sagawn nna, scaling n-gun ni hpe chyam yu ra ai. Scaling substances ni a shingra tara hpe chye na ai gaw, san seng na matu htap htuk ai solvent hpe dawdan ya lu na re. Alkaline hpe jasan jaseng ai lam hpe sulfate hte silicate scale a matu madung lang nna, acid hpe carbonate scale hku nna lang ai. Sodium hydroxide, sodium carbonate, hka shin na matu n-gun n rawng ai, hka n-gun shayawm ai, sodium silicate, hka ni hpe masat da ai shadawn shadang langai mi hta bang da ai san seng ai tsi hpe lang nna, n-gun n-gun hte coking hpe shaw kau mai ai.
Hkum tsup ai hku automatic heat exchanger a kata kaw na scale hpe shaw kau na matu, n bung ai descaling ladat ni hpe lang mai ai. Descaling ladat shagu hta arawn alai n bung ai majaw, na a tengman ai masa hpe madung tawn nna, gingdan ai descaling ladat hpe lata mai ai. Dai hta n-ga, hkum tsup ai hku hkum hkrang n-gun galai shai ai jak hpe gram lajang nna daw jau ai shaloi, aten tup n-gun shayawm ai lam hta n-ga, kaga gram lajang ai lam ni hpe mung, hkum tsup ai hku hkrat sum ai lam hpe shayawm na matu ra nga ai.wan wut galai shai ai wahte shi a daw jau ai prat hpe jat ya ai.