Slurry circulation pipeline,slurry circulation pipeline mainly uses butyl rubber lining rubber pipeline,it often appears rubber lining bulge,peeling, falling off etc.phenomenon during operation.If it appears in a large area,we should peel off the rubber lining,make the combined protective coatings on the pipeline,chooses the materials of BD407,BD408 and BD7053,to form the composite coating of the outer abrasion resistant and the inner corrosion resistant.
According to the empirical data, every 2mm thickness BD7053 wear resistant coatings can provide 1 year effective protection for the slurry circulation pipeline.If only partial is bulge and peeling,can clean up this part of adhesive residue,smear the BD436 rubber lining repair agent for repairing.The BD436 rubber lining repairing adhesive both has wear resistant and corrosion resistant performance,at the same time,it has higher bonding strength to metal and rubber,according to the empirical data,every 5mm thickness can provide one year effective protection for the slurry rubber lining pipeline during repairing.
Slurry circulating pump,the equipment of pumping over the limestone slurry.At present domestic wet desulfurization (FGD) system slurry circulating pump is mainly produced by Xiangyang 525,Shijiazhuang strong, Germany KSB, Switzerland sulzer,Australia Warman etc,the cost is very high.Slurry circulating pump mainly consists of the sheath,guard plate and impeller.The impeller is high speed rotation in the cavity body of forming by sheath and guard plate during working, make the inhalational slurry pump up into the absorption tower sprinkler device.Due to the limestone slurry is rich in solid particles,itself is also corrosivity liquid,it will bring very serious erosive wear and corrosion for the slurry circulating pump,in addition the slurry circulating pump will produce cavitation during operation,so it is necessary for protecting the slurry circulating pump.Sheath and guard plate choose combination protective coating materials:The BD426 anti corrosive coatings,BD709 shock resistant wear resistant coating.The BD426 corrosion resistant coatings and high chromium alloy has excellent adhesive strength,the BD709 impact resistant coating is the abrasion resistant coatings preparation from NDI - PTMEG modified epoxy,it is wear resistant,impact resistant,suitable for the working condition of erosive wear and cavitation.The impeller repairing chooses BD426 corrosion resistant coatings and BD772 machinable silicon carbide coatings,because the impeller should do dynamic balance after repairing,the repairing material must be machinable.
