The following are the respective introductions for the protection of the wet desulphurization main equipment.
1.The desulfurization of flue,the desulfurization of flue is divided into the original flue and clean flue.The temperature of original flue is high, basically give priority to the abrasion,smear the high temperature wear resistant coating materials for abrasion resistant protection,this position and blower fan is the highest temperature parts of the desulfurization system,the wear resistant coatings should resist more than 160 degree temperature (dry) for a long time,at the same time,the coatings also have enough toughness,prevent it from causing cracking,debonding between the coatings and metals or coating itself cracking when starting up and shutting down,the temperature changes fast.This part combined coatings choose the BD427 high temperature anti corrosive coatings and BD776 high temperature impact resistant type silicon carbide coating,in this combination,mainly take advantage of the features of BD427 high bonding strength as the primer transition layer,before the BD427 without curing,smear the BD776 on its surface,to make the wear resistant coatings achieve the high strength bonding to the metals.
2.Net flue is the flue where the completed desulfurization flue gas passes through,the temperature was in 40 to 80 degree (wet),corrosion is the main damage way,at the same time,there was also some wear and abrasion.This part combined protective coatings use the BD407 corrosion resistant coating,BD408 flake coatings,BD7053 desulfurization special abrasion resistant coating.We should use the BD407 for priming first during construction,and then smear the BD408 flake coatings,finally smear the BD7053 wear resistant coatings to form the coating structure of the inner corrosion resistant and the outer abrasion resistant.There is a large number of liquid rubber in the BD407,BD408 and BD7053,on the one hand,can prevent penetration of water molecules to metal,on the other hand,can improve the toughness of the coatings to avoid the coating itself cracking.
