With some exceptions, they are made from synthetic materials such as
Inserting special caulking ropes into the grooved division strips. The filter cloth retains the cake and is fastened to the drum face by
The filter cloth itself is fastened to the drumįace by inserting special caulking ropes into the grooves. Holding synthetic grids shown on the right that cover the entire drum and serve to TheĬompartments are divided with grooved division strips along the drum faceĪnd around the circumference of the drum heads. Theĭepends on the bridge setting of the main valve. Subjected to vacuum or blow while the drum is in rotation. The drum deck is divided into separately isolated compartments each That remains in the piping and compartment prior to blowing off the dry At this point the leading pipe evacuates the filtrate Note the point when the vacuum is cut-off and the trailing Section of the cycle of a single compartment as it passes fromĬake washing down to cake formation on the descending side of The animation on the left shows a partial
The trail pipes handle more liquid than the lead pipes so require a bigger Pipes that are connected to the inner row. The trail pipes areĪlways connected to the outer row and have a bigger diameter than the lead Of the drum up to the 12 o’clock position and then the lead pipes shown inīlue handle the wash filtrate on the descending side. The trail pipes shown in redĪre normally handling the mother filtrate on the ascending side The clip below shows the internal drum piping of the The exploded view below shows the assembly components The two different valves with their single and double row pipe plates: The internal piping manifold prior to cake discharge. Liquid from the descending compartments by purging inert gas through Sophisticated valve that allows very quick evacuation of residual wash Than the internal pipe port so that the vacuum is continuous and the cakeĬomplex drum filters such as lube oil dewaxers. Since in continuous operationīoth lower and upper zones are under vacuum this bridge is slightly narrower The entire drum face is wrapped with the cake. Once the cake starts toĮmerge from the tank the valve is gradually opened and fully opened when When closing the valve that controls this zone. The upper vacuum zone is open to atmosphere and a cake may be formed only This bridge cuts off the vacuum so it is slightly wider than the internal pipe port. The duty of the bridges is: (please also refer to The majority of drum filters have a valve with three bridge blocksĪnd a single row pipe plate as shown below and on the right. Of the drum when the slurry level in the tank is at the maximum. To dry ratio within the filtration cycle as well as the "effective submergence" Adjustable bridge blocks enable the optimization of form The valve has on certain filters adjustable blocks and on othersĪ fixed bridge ring. To a point that it is cut-off and blow takes place to assist in discharging When a sectorĮnters submergence vacuum commences and continues through washing, if required, That each sector is subjected to vacuum, blow and a dead zone. The internal piping that is connected to each sector passes through the trunion and ends up with a wear plate having ports that correspond toĪ valve with a bridge setting controls the sequence of the cycle so The drum face is divided into circumferential sectorsĮach forming a separate vacuum cell. The drum is supported by a large diameter trunion on the valve end and a bearing on the drive end. Components move mouse pointer over the menu
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