Sɛ́ ɔhyew a wɔde sesa nneɛma a wɔde nsu di dwuma sɛ ɔhyew soa no, ɛnyɛ den sɛ nsenia bɛbata ɔhyew a wɔde sesa nneɛma no ani. Sɛ wɔanyɛ descaling bere tenten a, nsenia a ɛba wɔ ɔhyew a wɔde sesa nneɛma no ani no bɛyɛ kɛse kɛse, na ɛbɛka ɔhyew a wɔde kɔ baabi foforo no yiye na ɛde ɔhyew a ɛyɛ adwuma koraa no asɛe. Enti, bere a wode a .Ɔhyew a wɔde sesa nneɛma a ɛyɛ adwuma ankasa koraa .,Ɛsɛ sɛ wɔde descaling daa. Enti, dɛn ne akwan a wɔtaa fa so yi descaling no?
Akwan a wɔfa so yɛ adwuma anaa mfiri a wɔde yɛ adwuma. Sɛ nsuo afiri no ano yɛ den kakra na ɛho ntew a, wobetumi de nsa anaa mfiri akwan te sɛ scraping ne wire brush, a wɔde mframa a wɔahyɛ no den aka ho, a ɛkorɔn-ahyɛ nsuo, ne nsuonwini a wɔde bɛhohoro ho no asiesie. Sɛ nsu afiri no ho gu fĩ kɛse anaasɛ esiw koraa a, wobetumi de nsu paipu nsu a wɔde yɛ adwuma (a wɔsan frɛ no paipu auger) adi dwuma.
Akwan abien na ɛwɔ hɔ a wɔfa so hohoro nneɛma ho. Nea edi kan ne countercurrent flushing, a wɔtaa de di dwuma bere a wɔreyɛ adwuma anaasɛ bere tiaa bi a wɔde gyae adwuma no. Ɛho nhia sɛ wɔpaapae nnwinnade no mu, nanso ɛsɛ sɛ wɔde countercurrent bypass line di kan-de si hɔ. Saa kwan yi tu mpɔn kɛse bere a scaling no nyɛ den no. Nea ɛto so abien no yɛ kɛse-nhyɛ nsu a ɛrehuruw no so. Wɔde nsuo jet ti ahodoɔ a ɛkyinkyini no di dwuma ma ɔhyeɛ a ɛsesa, ɛyɛ den anaasɛ ɛyɛ mmerɛw, a nhyɛsoɔ a wɔtumi sesa no firi 10 MPa kɔsi 200 MPa. High-Pressure water jets fata sɛ woyi efĩ fi nsu paipu ntam, nsu afiri mu, ne akorade no so. High-Pressure water jet flushing of heat exchangers yɛ nea etu mpɔn kɛse na wɔde di dwuma kɛse.
1. Ahosiesie a edi kan (clarifying scale su ne nnwinnade tebea) .
Scale sampling and analysis: Fa laboratory testing kyerɛ nneɛma atitiriw no na paw cleaning solution no.
Equipment Status Inspection: Hwɛ sɛ ebia ɔhyew a wɔde sesa nsu no ayɛ mmerɛw, ɛretu anaasɛ asiw ano, a wobetumi de nhyɛso gauge nsonsonoe no abu ho atɛn;
Yɛ ahotew nhyehyɛe: Fa nhwehwɛmu no mu aba no kyerɛ ɔkwan a wɔfa so siesie nneɛma no na yɛ nhyehyɛe a egye ntɛmpɛ.
2.Core cleaning kwan: nnuru a wɔde tew ho .
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Scale type . |
Nneɛma a wɔkamfo kyerɛ . |
Nneɛma a wɔde di dwuma . |
Ahwɛyiye . |
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Carbonates (accounting a ɛboro 80%) . |
Hydrochloric acid (5%-10% dodow), citric acid (8%-12%) . |
Carbon dade, dade a ɛnyɛ den . |
Ɛsɛ sɛ wɔde hydrochloric acid ka ho denam corrosion inhibitor (te sɛ hexamethylenetetramine) so na amma ansɛe; Citric acid fata ma acid-nneɛma a ɛyɛ mmerɛw. |
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Sulfate/Silicate (ahonhonsɛmdi) . |
Sulfamic acid (10%-15%) + fluoride (a ɛboa) . |
dade a ɛnyɛ den, kɔbere a wɔde afra . |
Ɛsɛ sɛ wɔhwɛ fluoride dodow so denneennen ( ennu anaasɛ ɛne 2%) yɛ pɛ na amma silica nsenia no anyɛ den . |
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Nneɛma a wɔde afrafra . |
Nnuru a wɔde tew ho (te sɛ hydrochloric acid + citric acid + corrosion inhibitor) . |
Carbon dade, dade a ɛnyɛ den . |
Sɔhwɛ ketewa bi ho hia na ama wɔatumi ahwɛ sɛ corrosion resistance no yɛ nokware (coupon test: corrosion rate a ennu anaasɛ ɛne 0.1mm/afe yɛ pɛ) . |
3.Hophysical cleaning (a ɛfata ma nsenia a emu nyɛ den anaa nneɛma a ɛyɛ mmerɛw) .
Nipadua mu ahotew nhia nnuru a wɔde yɛ nneɛma na ɛfata ma scenes a scale no ayɛ mmerɛw anaasɛ ade no nyɛ acid{0}}ɛko tia. (High-Pressure nsuo jet cleaning, mfiri scraper cleaning, ne ultrasonic cleaning yɛ optional) .
4.Agye a wogye tom wɔ ahotew akyi ne da biara da anti-Scaling gyinaesi ahorow .
Ahotew tumi a wogye tom (aniwa mu nhwehwɛmu, adwumayɛ ho sɔhwɛ) .
Daily anti-Scaling measures (tew nsenia a wɔsan yɛ no foforo so, fa nsu a ɛma nsu yɛ mmerɛw gu nsu a ɛkɔ mu wɔ unit no mu) .
Nsu a wɔde sesa nneɛma a wɔde sesa nneɛma a ɛyɛ kɛse no fi nsu a ɛnyɛ papa mu titiriw, na ɛno na ɛde nsenia ne srade ba, a ɛyɛ coking, osutɔ, ne a ɛbata ho no. Akwan a wɔfa so ma nneɛma fi nipadua mu no hwehwɛ sɛ wodi kan hwehwɛ nneɛma a ɛma nneɛma yɛ kɛse no mu na wɔsɔ hwɛ. Sɛ yɛte sɛnea nneɛma a wɔde yɛ scaling no te ase a, ɛbɛboa ma wɔahu aduru a ɛfata a wɔde siesie nneɛma. Wɔtaa de alkaline a ɛho tew di dwuma ma sulfate ne silicate nsenia, bere a wɔde acid ahotew yɛ carbonate nsenia. Wobetumi de aduru a wɔde tew ho a ɛyɛ sodium hydroxide, sodium carbonate, nnuru a wɔde horo nneɛma, nsu a wɔde hohoro nneɛma ho, sodium silicate, ne nsu a ɛwɔ nsusuwii pɔtee bi mu no ayi srade ne nea wɔde yɛ aduan no.
Sɛnea ɛbɛyɛ na wɔayi nsenia afi ɔhyew sesa a ɛyɛ adwuma koraa no mu no, wobetumi de akwan horow a wɔfa so yi ɔhyew afi mu adi dwuma. Descaling kwan biara wɔ su ahorow, enti wubetumi apaw descaling kwan a ɛfata a egyina wo tebea ankasa so. Bio nso, sɛ wɔhwɛ ɔhyew a ɛyɛ adwuma koraa so na wɔyɛ ho adwuma a, nea ɛka ho ne sɛ wɔbɛma nneɛma akɔ so ayɛ adwuma daa no, ɛho hia nso sɛ wɔyɛ nneɛma foforo a wɔde siesie nneɛma no na ama wɔatew sɛnea nneɛma a ɛyɛ adwuma koraa no di nkogu no so .Ɔhyew a wɔde sesa nneɛma .na ɛtrɛw ne som nkwa mu.