Show A NEW kew TYPE OF VACUUM FILTER IS introduced BY THE DORR CO A distinctly new type of continuous vacuum filter to be known as the dorico filter has been introduced or general filtration work by the dorr company of new york several new features are incorporated in this filter which give it a relatively wider field of application than the usual ype of vacuum filter referring to fig 1 it will be seen that the filter medium is applied on the inside of the drum and that the division of the total filter medium bior into several sections or panels makes it possible to change all of the cloth or any copper panel of oe it by removing the wood strips which secure the medium to the drum vacuum for cake formation drying and washing and air for cake discharge are applied to the panels through a port valve tov of f the usual type adjacent jace nt to the closed end endom of the drum all pig ilig I 1 sectional E end nd view aliew of filter A piping is is located on the outside of the drum and is extremely accessible the drum at its open end is provided with an internal flange which serves to retain the pulp within it during fil 74 wee cover tro elgh so iv 1107 wead q COMM bearl ap screen cyp rt VS ivr p 7 S tiding ng roll R y roll fis fig 3 2 sectional side view of filter ration 10 thus 2 shows the feed ed eliminating g the filter tank fig the pipe extending extend into the drum through the brunion at eith ca closed 0 sed end of drum although the feed may enter through daneli 11 end as desired the e cake is discharged from each panel in turn arn by pulsating air air admitted between the cloth arid and filter the ta shell 1 by a special valve which is driven from the side blunter cl Unter shaft the filter cake drops into a hopper in m the e drum dourn and is removed by a screw conveyor lid end A bearing bearint supports the filter at the closed trundle brundl while wl the drum is supported near the open end by a r roller bearing earan the tire being secured to the shell and the I 1 mo 1011 anted the drum is S rotate i on the main filter by means of and drive and turns 1 I a worm worm gear ca a ilor fwise direction the filter is furnished with direct drive anve or is arranged for belt drive from a line shaft it will 1 at once be seen that in the dorico filter er gravity aids n fiu filtration by causing the particles to tend to segregate directly against the filter medium fig 3 represents a cross section through the filar filter r drum showing the direction of segregation re of the rela dively coarse particles 4 which takes 1 alter place in substantially I 1 the same direction as in a a graduate filled rl rz ine tj suspended with pulp this feature KS ugna 7 w L y is of considerable coarse segregated CT graduate sec ion through importance tilter filter drum since segregating and F fig ag 3 sh sketch etch illustrating direction dilute pulps culps may be of segregation of the pulp handled readily relatively coarse quick settling material may be contained in the feed agitators and air lifts to keep the solids in suspension are not required and after a shut down operations may be resumed without any tendency for them the settled material to stall the machine since particles of the same specific gravity settle at different rates according to their relative size and shape the coarsest particles in the feed form that part of the cake which lies next to the filter medium while the finest ones are the furthest removed the new dorico continuous filter from the cloth as installed this minimizes the tendency of the fines to work into the pores of the cloth and thereby assures a uniformly high filtration rate and a long life for the filter medium one large dorico filter has been in commercial operation for over a year and other units have been operating b for some months while the abilia ability y of this filter to handle coarse material is one of its most interesting features this unit is equally well a adapted to handling the other pulps culps which are generally watered de on filters dr C V corless managing director of the mond nickel company says the very ages aes of man are indicated in mineral terminology the stone age the bronze age the iron age and the steel age which 6 may become known as the age of alloys our great build buildings building inz so our ur roads streets power plants means of communication with or without wires railroad transportation and about everything that we can think of in imodean civilization is based on minerals |