US1685736A - Machine for paper-making processes - Google Patents

Description

WWM

IHI. D. WELW MACHINE FOR PAPER MAKING PROCESSES Filed Sept. 9, 1927 2 Sheets-Sheet INVENTQR FOLD 0. kid-2M5 WITNESSES RNEYS flfi fifi fi H. 1Da WELLS MACHINE FOR PAPER MAKING PROCESSES Filed Sept. 9, 1927 2 Sheets-Sheet flf INVENTOR WITNESSES l 7 i x hfi/PULDQ WsLLa I Wit/W06,

ATTORNEY lid all)

Patented Sept. 2%.

MAUHTNE FOR: PAPER-11d l. WOTIJD 1D. WELLS, F GLJENS FALLS, NEW YORK it; and PROC'ESSJEd.

Application filed September 9, 192']. Serial Ito. 9218,53 1.

This invention relates to a machine which is used in paper making processes.

The principal object of the present 1nvention is the provision of a machine of general utility embodying improvements whereby the machine may be readily converted to be utilized as a knotter, sliver screen, screen, pulp washer, thickenenfilter and save-all.

The nature of the invention and its distinguishing features and advantages will appear when the following specification 1s read in connection with the accompanying drawing, in which Figure 1 is a horizontal sectional view through the machine taken on the line 11 of Fig. 2.

Fig. 2 is a vertical sectional view takenon the line 22 of Fig. 1.

Fig. 3 is an enlarged sectional view illustrating certain features of the rotor.

Fig. 4; isa sectional view taken on the line 1-4 of Fig. 3.

Fig. 5 is an enlarged sectional view illustrating a modification.

Fig. 6 is a sectional view illustrating certain modifications.

Fig. 7 is an elevation of the rotor and pan of the modified form of machine shown in Fig. 6; the section through the pan being taken on the line 7-'l of Fig. 8.

Fig. 8 is a plan view of the pan.

The machine of the present invention is preferably of a vertical type to obtain greatest efiiciency. The machine comprises a casing or yat 10 in which the stock or pulp is introduced, a rotor 11 arranged in the casing 10 for subjecting stock or pulp to rotational movement and pressure. and for utilization in conjunction with the casing 10 as a screen or filter; means 12 for driving or rotating the rotor 11; and a suitable foundation 13 upon which the machine in its entirety is supported.

The casing 10 comprises a cover 14, side sections 15, 16 and 17, and a bottom 18. The

side sections 15, 16 and 17 are connected in any suitable manner to the cover 14, the cover being bolted so that it may be easily removed. The bottom 18 is also fastened to the side sections 15, 16 and 17 in. any suitable manner such as by the use of bolts. The side sections 15, 16 and 17 are so arranged and so shaped as to provide an inlet section for the stock or pulp, this being the section 17., and a discharge openinglt). The section 1'? i has connected therewith an inlet 26.

to steady the bottom end of the rotor.

The casing 10 is supported on a base 21 formed to provide a trough 22 and a neck or collar 23 which surrounds the bushing 241 having a rubbersection 25. The base 21 rests on the foundation 13 of concrete, or any other suitable foundation. The foundation 13 is formed toprovide a trough 26 for conducting away the waste and liquids.

The rotor 11 includes a top disk 27, a center spider 28, and a bottom spider 29 connected together. The bottom spider 29 has formed thereon a flange 30 which coacts with a flange 31 formed on the bottom 18 of the casting 10 to hold a rubber gasket 32 to prevent leakage at this point. The bottom spider 2.) also has formed therewith a funnel 33, and a discharge pipe 3 1- connected with the funnel 33. The discharge pipe 34 extends through the bushing 2d, and opens into the trough 26. The rubber section 25 of the bushing 24 prevents leakage and SGELV'BS 11W possible leakage between the lower end of thh rotor 11 and the bottom of the casing 10 will be caught in the trough 22, and be conducted therefrom to any desired place. Any possible leakage between the discharge pipe 31 and the rubber section 25 will be caught in the trough 26. The rotor 11 also includes a plurality of filtering and screening sections 35, there being twelve sections in the prescnt instance, although any other equally aficient number may be used. Each section 35 includes a frame 36 secured to portions of the disk 27 and spiders 28 and 29 by-suitable fastening-elements such as screw bolts 37. Attached to the frame 36 is a perforated plate 38. The plate 38 is of the same size as theframe 36. Arranged transversely of the frame 36 are slats 89. The slats 39 are arranged adjacent the plate 38 at the inside, and each slat is inclined downwardly and outwardly. A. wire cloth 40 of suitable size is clamped in any suitable manner to the frame 36. Suitable rubber gasket sealing strips l1 are provided. Each of the strips 41 is clamped in place as at 4:2 to one side of each frame 36. Each strip 41 extends radially outward.

The rotor 11 is arranged eccentrically with respect to the side sections of the casing 10 .so that the strips 11 will arrest the flow of the stock or pulp within the casing. and to set up a sealing engagement with portions of a the plate sections 15 and 16 to prevent the escape of the stock or pulp encept through.

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lltltii ranged as to the discharge opening 19 in the rotation of the rotor 11.

The rotor is driven by the means 12 which includes a shaft 43 on which the disk 27 and spiders 28 and 29 are fixedly mounted, a bevel gear 44 on the upper end of the shaft 43 which meshes with a bevel pinion 45 on a shaft 46 mounted in suitable bearings 47 secured in place on the cover 14. The shaft 46 may be connected with any suitable power means for imparting movement to the shaft 46. The shaft 43 has a collar 48 which rests on the cover 14. It will be apparent that- When the cover 14 of the casing is removed that the rotor 11 and driving means 12 connected therewith may be also removed intact. When the machine is used as a thickener, save-all, and filter, the wire cloth 40 wi1l be included and be used with the plates 38. To convert the machine for use as a knott er, sliver screen, and screen for other purposes, the wire cloth 40 will be omitted. The sections 35 may be readily removed through the discharge opening 19 of the casing for removing and applying the wire cloth 40.

The success of this machine when used as a save-all, thickener, and pulp washer, depends mainly on the wire cloth 40 being kept clean. This is accomplished by a liquid bath caused by the slats 39, each trapping a small portion of liquid, so that when the stock revolves with the rotor 11 past discharge opening 19, pressure on the stock against the wire cloth 40 is relieved. The liquid trapped by the slats 39, flows outwardly through the wire cloth, cleaning it of any clinging stock which is discharged through the opening 19. When air is used to give the stock an air bath, the discharge pipe 34 is sealed by liquid allowed to remain in the trough 26. By sealing the discharge pipe 34 in this manner, air will be trapped in the rotor 11. The air trapped in the rotor 11 will blow stock off plates 38, and wire cloth 40 when used with plates 38, at the discharge opening 19.

In order to carry out. pulp washing operations, the casing side sections are provided with one or more perforated portions 49 and a cup 50 adjacent the portions 49 for conducting; water into the casing 10. This provision will. serve adequately for washing black liquor from soda or sulphate pulp, and to accomplish this the rotor 11 may be used.

In accordance with one feature of the invention the stock or pulp is introduced into the casing 10 by the inlet 20 which is so arcause the flow of the stock or pulp in the direction of rotation of the rotor, thereby assisting in turning the rotor. In order to permit the passage of large knots and slivers of the stock or pulp introduced to the casing 10, the casing may be constructed so that a portion of one or the plates will spring outwardly away from the rotor. On reference to Fig. 5 it will be ap parent that such feature may be accomplished by providing the side plate 15 at the discharge opening 19 with a rubber sheet 5.1 which is clamped along one edge by clamping means 52, while the opposite side portion of the sheet has attached thereto a sheet of metal 53, preferably steel. A channel iron 54 is "arranged vertically adjacent the sheet of metal 53 and is held in place b securing the opposite ends respectively to the cover 14 and bottom 18 of the casing. Any prcferred number of guide members 55 may be employed in connection with the metal sheet 53 and the channel 54 to operatively retain a corresponding number of coil springs 56 in place between the metal sheet 53 and the channel iron 54. The guide members will be carried by the metal sheet 53 and will extend through holes respectively in the channel iron. Each member 55 has a nut 57 which limits the inward movement of the rubber sheet 51. It will be apparent that the sealing strips 41 will coact with the rubber sheet 51, and that such sealing strips 41 and the rubber sheet 51 will act on the stock in the casing in the rotation of the rotor, while permitting comparatively large knots and slivers to pass out through the discharge opening 19 ot the casing 10.

For washing black liquor from soda or sulphate pulp, there is provided a rotor 11, which is divided by partitions 60 into compartments 61. The casing 10 is provided with washing conductors 62 through Which water is introduced to the casing, for so quence washing. so as to maintain the highest possible concentration of liquor. Tn accordance with this feature, the casing also has rubber sealing sheets 63 attached to the inside thereof. A pan 64 is arranged below the rotor 11'. The pan 64 is divided by partitions 65 into a compartment 66 and compartments 67. The compartment 66 has an outlet 68 and the compartments 6'? each have an outlet 69. During the rotation of the rotor 11. the concentrated liquor will filter through the-wire cloth of the rotor, and will be caught in the compartment 66 of the pan 64 to be carried oil by the outlet 68. The dilute liquor will be caught in the compartments 67 of the pan to be carried off by their respective outlets 69.

It is to be understood that the stock or pulp may be introduced 'to'the casing 10 under pressure to increase the capacity; that the stock discharged through the opening will fall into a chest or other desirable appurtenance; that the means 12 which constitutes a motion transmission means may be driven by any suitable variable speed motor or other power means to revolve the rotor at proper speeds for greatest efiiciency; and that the use of a vacuum may be resorted to for the filtering operations.

1' claim:

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naaavaa 1. In a machine of the class described, a casing for the stock, a rotor arranged within the casing, said rotor being of hollow construction, closed at the top and having an outlet at the bottom, said rotor having a perforated side wall which serves as a filterin means, and said rotor having sealing strips adapted to move in contact with the side walls of said casing.

2. In a machine of the class described, a casing for the stock, a filtering rotor arranged within said casing, said casing having an inlet and an outlet for the stoclr, said inlet so arranged as to cause the flow of stock in the direction of rotation of said rotor toward said outlet, and meansbelow the rotor for conducting away waste-matter and liquid.

3. A machine of the class described, including a casing having a detachable cover; a screening rotor, and motion transmission means operatively connected with said rotor, said rotor and motion transmission means being carried by said cover, and said rotor being disposed within said casing when the cover isin place.

4L. In a machine of the class described, a casing for the stock, a filtering rotor arranged within the casing and supported for rotation on a vertical axis eccentrically with respect to the side walls of the'casing, said casing having a discharge opening, and means on the rotor which coacts able means on one of the'side walls of the casing adjacent said discharge opening to discharge comparatively large knots and slivers of the stock fed into said casing.

5. In a machine of the class described, a rotor of hollow construction closed at one end and having an outlet at the opposite end, said rotor also having an arrangement of side sections detachably connected, and each section consisting of a frame, a perforated plate secured to the frame, and a Wire cloth detachably clamped over said perforated plate.

6. In a machine of the class described, a rotor of hollow construction closed at one end and having an outlet at the opposite end, said rotor also having an arrangement of side sections detachably connected, and each section consisting of a frame, a perforated plate secured to the frame, a wire cloth detachably clamped over said perforated plate,

with yield til and slats arranged adjacent said perforated ff plate on the inside thereof.

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