The LYWSQ flue gas desulphurization slurry circulating pump inlet alloy filter a technical background set in the desulfurization unit slurry circulating pump inlet strainer, prevent debris slurry into the slurry circulating pump, can cause damage to the slurry circulating pump, clogged spray nozzle general debris will not damage the circulation pump will cause nozzle clogging of the spray layer. Additional filter can effectively prevent small debris, rubber lined off nozzle clogging. Currently increasingly stringent environmental requirements, smoke tower one bypass desulfurization equipment required to synchronize with the host stable continuous operation. Slurry circulating pump filter operating environment susceptible to blocking, running is not timely clean-up, leading to a slurry circulating pump inlet negative pressure, reduced efficiency, filter by suction increases the risk of damage increases, many plant inlet screen clogging, fouling, damage caused by the slurry loop piping system floating seriously affect the slurry circulating pump life desulfurization slurry circulating pump forced out of the running due to filter clogging and damage caused by the spray layer and injector clogging, the impact desulfurization efficiency, spend a lot of manpower, material in clean spray layers and nozzle, prolonged shutdown, according to the current situation will seriously affect the generator unit running. Slurry circulating pump the filter clogging fouling and causes of damage gypsum scale formation gypsum slurry of CaSO4 saturation ≧ 1.4. The greater the degree of supersaturation, the faster scale formation, when the slurry Central Asia high concentration of calcium sulfate with calcium sulfate will precipitate crystals, the formation of these two substances mixed crystalline (Ca (SO3) x ( SO4) x.1/2H2O), the mixed crystals gradually grew up on the filter surface to form the sheet scale layer. If using the current filter (FRP glass steel) structure, the filter material (FRP glass steel), the hole is rectangular to increase the structural strength and need to increase the thickness of the filter (FRP glass steel), resulting in growth of crystalline solid residence time, which in the filter network (FRP FRP) surface gradually grow to form the sheet scale layer. When the dirt floor increases the slurry circulating pump circulation area is reduced, resulting slurry circulating pump inlet negative pressure increases, the inlet flow will cause slurry circulating pump piping vibration, can not guarantee the security and stability of the slurry circulating pump run. If the filter (FRP FRP) slurry damaged debris into the slurry circulating pump caused by the spray layer nozzle clogging, fouling, damage. Seriously affect the desulfurization efficiency. Third, the reform scheme is currently using the filter design alloy structural filter the flow area of ??the site condition should remain in the circulation pump inlet pipe diameter of 3 to 4 times, and as much as possible to take high value. The same due to the blocking problem is serious, the hole diameter filters on the market has been in use for many years in diameter 20mm increased to 25 ~ 30mm, aperture spacing 6 ± 1mm ??thick steel plate 6 ~ 8mm extensive use eccentric hollow cone nozzle spray system (nozzle inner diameter are generally in the more than 40mm) is more feasible, in the case of ensuring the flow of slurry circulating pump (pump alloy filter to replace the original (FRP fiberglass filter), and the alloy filter into a force is preferably arc-shaped, the opening also tends so with higher strength of the hole, and in a weak force at the upper and lower plane to increase the reinforcing ribs to ensure the strength, while in the slurry circulating pump inlet top creation alloy filtered network, thus increasing the flow area, so as to solve the slurry circulating pump strainer and spray layer nozzle clogging, fouling, damage to ensure the normal work of the spray layer to ensure that the desulfurization efficiency, thereby ensuring the desulfurization system to keep pace with the unit running. alloy filters, after the transformation of the expected effect of increasing the flow area, so as to solve the slurry circulating pump filter and spray layer nozzle clogging, fouling, damage, spray layer, nozzle normal work to ensure that the desulfurization efficiency, thereby ensuring the desulfurization system plant operation to keep pace. desulfurization device slurry circulating pump inlet strainer transformed into the alloy structure, given in the operation and management of a more rational, you can guarantee that the desulfurization run time to save operating costs, but also for the enterprise. transformation of the circulating pump inlet strainer is alloy structure, the first play of the protective effect of the circulating pump while ensuring the spray layer and the nozzle will not clog, fouling, damage, play a role in filtering protection. increased alloy filter strength, increasing the opening rate to prevent gypsum crystal filter fouling, clogging, damage, extend the use of the slurry circulating pump impeller, to extend the use time of the filter life of more than 5 years.