US2615387A

US2615387A - Continuous-flow press for removing moisture from material such as bark, bagasse, peat moss, and the like

Info

Publication number: US2615387A
Application number: US74293A
Authority: US
Inventors: Hjalmar S Messing
Original assignee: Sunds Defibrator Inc
Current assignee: Sunds Defibrator Inc
Priority date: 1949-02-03
Filing date: 1949-02-03
Publication date: 1952-10-28
Anticipated expiration: 1969-10-28

Description

Oct. 28, 1952 H, s MESSlNG 2,615,387

CONTINUOUS-FLOW PRESS FOR REMOVING MOISTURE FROM MATERIAL SUCH AS BARK, BAGASSE, FEAT MOSS, AND THE LIKE Filed Feb. 3, 1949 3 Sheets-Sheet l z llfifi F 9 O 0 (0 0 O I o 0 2 0 o s: Q s

g 1 WI/IIIl/Il' I Q m N .j w.- I

d O 94 I (q INVENTOR. C); HJALMAR S. MESSING LI BY AT T6 RN LY INVENTOR. HJALMAR- 5 MESSING OCL 28, 1952 H MESS|NG 2,615,387

S. CONTINUOUS-FLOW PRESS FOR REMOVING MOISTURE FROM MATERIAL SUCH AS BARK, BAGASSE, PEAT MOSS, AND THE LIKE 3 Sheets-Sheet 3 Filed Feb. 3, 1949 ooooooooooooooooooooo ooooooooooooooooooooo ooooooooooooooooooooo INVENTOR. HJALMAR s. MESSlNG AT TO RN EY- Patented Oct. 28,1952

.ibNriNUoUs-fiow PRESS FOR REMOVING ,MOISYTUBE FROM MATERIAL SUCH AS. ,BARK, acAssarE r oss, AND THE 7 iLIKE,

Hjalmar Si Messing, NewYoi-k, N. Y., assignor to American *Defibratorj Inc., New York','N. Y., a

corporation of New York application February s, 1949, Serial No. 74.293 W L 3 Claims. (01. 100-125) V justable externally of the compression chamber,

ciently reduce the water content of material of the character indicated which it is desired to I employ for fuel purposes, as well as many other types of material whose effective utilization depends upon' reduction of water content, such as wood chips and wood shavings employed as starting materials in the fabrication of fiberboard, wallboard andthe like. 'f

Another object of the invention is the provision of a dewatering press whichis' constructed and arranged in such amanner that the removal of water thereby will be accomplished in a smooth and continuous operation, the material of high I water content being fed "continuously to the press atone end and the material of reduced water other end.

A further object of the invention is theprovicontent being'discharged continuously at the sion of a dewatering press of the characterde-- scribed having a receivingchamber, .a compression chamber and an intermediate chamber provided with slots or apertures allowing'drainage of water from the material being treated without interfering with the continuous, operation of the press.

An additional object of the invention is the provision of a dewatering pre'ss having a tapered screw with diminishing pitch arranged to compress the material being treated withina-compression chamber having forwardly convergent walls with longitudinal grooves formed'therein in order to achieve high compression and efficient dewatering, the walls of the compression-chamher being further provided with clog-free apertures for draining the water removed fromthe material being treated. t

Another feature ofthe invention resides in'a novel arrangement for minimizing wear andextendingthe life of the press by providing adjustable and replaceable inserts extending along the longitudinal grooves of the compression chamber, each insert being mounted-between an adjacent pair of segments forming the body'of the compression chamber and the inserts being adconstruction of the compression chamber or as by means of bolts intersecurin the chamber segments.

The foregoing objects as well as additionalob jects and advantages of the inventionwilljfbe readily apparent in the course of theiollowing detailed description taken in connection-with the accompanying drawings which illustratea preferred embodiment of the invention, and

wherein: f

= Fig. 1 is a top plan view of a dewatering press embodying the features of the invention;

' Fig. 2 is a sectional view taken on line 22 of 1; Fig. 3 is a vertical section taken on line 3-'- -"3 of Fig. 4 is an enlarged detail view illustratingthe throat and the intermediate chamber or base ring; v

Fig. 5 is a sectional viewtakenon line 5 -5 of Fig.4; I

throat Fig. 6 is a sectional View taken on line 5 -6 of Fig. 4

Fig. 7 is a fragmentary detail view taken on line 1-5-1 of Fig. 6 showing the arrangement of the adjustable groove inserts between; adjacent throats'egments; Fig.8 is a fragmentary detail view taken-on 'line'8-8 of Fig. 6 illustrating the formation of the clog-free aperturesinthe throat segments;

and

Fig. 9 as sectional view taken on line'il-Qfof Fig. 4 illustrating the construction of an adju s table discharge device which may be incorpo rated in the dewatering press.

Referring now to the drawings in reater dev tail, a uniform flow of material through thepress is assured in any suitable manner, asibyme'ans of a twin screw feed ll], lli jarranged in hopper l I and drivenby means of motor l2 through; belt 13 and gears l4. The material being fed to the fper ll. Water removed from'the'materialin hoppress undergoes preliminary compression 'in 'hopper HQ is drained through ai-pluralityof small apertures I5 inthe bottom'wallfl of said hopper, asshown'in Fig. 2, and received in an inclined trough I communicating with the drainage systemofthepress' I I 'ing purposes. A. helical compression elemer tor screw '20 extends forwardly -within receiving The material passes from hopper I I into of the press.

rotatably mounted in a fixed bearin member or ports or slots 28.

zprotates.

Since most curs in compression chamber or throat member 26' h the greatest amount of wear results therein, Darchamber l8 and within the remaining portion Shaft portion a of screw 20 is housing 2| as by means of roller bearings 22 and thrust bearing23. Suitablmoil retainers 241 are also provided atjeither end of bearing member 2| and a water throw-oil ring 25 is mounted on shaft the press through slots 28 of base ring 21 provision is also made in' throat member 26 for drainage in the form of a plurality of rows of clogfree apertures 32 formed in each throat segment .29.:- .Drainage apertures 32;are preferably formed Jjiwit'h ammermost pdrtioii32a of relatively small 20a between said bearing member and the adja- "cent end of receiving chamber l8 to preventthe possibility of any water entering theflbear-ing member. Screw 20 is drivenat the desired" of revolution from an external power source (not shown) preventing any of the material being treated diameter opening into an outermost countersunk ;portion 32b of relatively large diameter, as best shown in Fig. 8,in order to provide efiicient drainage and; prevent clogging while simultaneously "from passing through said apertures. For exam- The rotation of screw 20 will carry the material being dewatered into theanterior portionof the press comprising the compression chamber or .ple with a throat member of 1 wall thickness 'awdrainage raperturehaving an innermost portion of A "diameter and 1%" depth and an outermost countersunk portion of diameter has throat member 26 and theJ-intermediate cham her or throat. base ring 21, most of the compresproven satisfactory. The depth of innermost por- "tion' 32a is preferably slightly less than the dision of the material occurring in the throat mem ber 26 and the primary function of the intermediate chamber or base ring 21 being to afford drainage of the bulk of the water expressed from the material in said throat member. Accord- ..ingly, in the preferred embodiment of the invenl. tion, both throat member 26 and throat base ring- 21 are formed as frusto-conical section having forwardly-convergent inner walls so that the pre- 5 ponderant flow of water expressed from the ma- --terial in said throat member will be rearwardly to the throatbase ring 21. l I

As clearly shown in Figs. 3, 4 and 5, throat base ring 21 is provided with a plurality of drainage Inorder to provide foreficient discharge of water and simultaneously prevent'clogging, slots 28 are preferably formed of uniform width inwardly for a relatively short distance as shown at 28a and then of gradually increasing width outwardly as shown at 2822 in Figs.

In order to assure efficient compression and maximum dewatering of the material being treated the anterior end of screw 20, i. e. the

portion of said screw fitting within the throat base ring 21 and throat member 26, is formed with diminishing diameter and diminishing pitch so as to fit snugly within the respective portions of the press, as clearly shown in Fig. 3. I Base ring 21 and throat member 26 areprovided with preferably angular spaced longitudinal grooves or recesses Z'Iaand 26c defining retaining surfaces 21b and 26b against which the material being treated can be crushed and compacted for maximum compression and removal of water as screw of the compression of materialocticularly along the.,retaining surfaces 26b of grooves 26a. The life of throat member 26 may .be greatly extended by formingsaid throat memberflfroma plurality of segments. 29 interconnectable as by means of bolts 30, asshown in Figs. 6, and 7. Specialhardened inserts or facings. may be interposedbetween. adjacent .seg-

ments 29 to serveas the retaining surfaces 26b.

Said inserts 26bv may. be adjusted periodically with continued use to compensate for attendant. wear as by means of elongated mounting-holes 3| which receive the segment mounting bolts vi0.

,When no longer adjustable, worn inserts maybe I replaced by fresh inserts by dismantling throat segments without requiring a completely'new throat member 26. V

While the bulk of the water expressed from the ,material in throat member 26.; drains;;fr0n1; ,75

- and not ina limiting sense."

ameter thereof.

Throat member 26 is surrounded by a drainage jacket 33 communicating with a main drainage trough. 34 having its bottom inclined downwardly toward a centrally disposed outlet pipe'35 to assure continuous automatic drainage. Inclined trough I! also communicates with main trough 34, as shown in Fig. 2. I

An adjustable pressure-relieving discharge'device or rattrap is'preferably provided for the dewatering press. vThefdischarge device comprises a pair of side plates, 36, a bottom plate 31,

. and a hinge plate 38 swingable mounted between said side plates at. The volume of the-discharge device and the downward pressureiof hinge plate '38 may be varied to control the; dischargerate sion chamber 26 and by exerting pressure on the material will express residual waterjtherefrom through perforations 40. Drainage jacket 33, extends into the region of discharge device 35.

Since certain modifications may be madein lthe dewatering press of the presentinvention without departing from the scope thereof, it is intended that all matter contained in the foregoing specification and' shown in the accompanying drawings be interpreted merely as illustrative What is claimed is:

1. A continuous-flow dewatering press comprising a receiving chamber; feeding means therefor; a compression chamber-having walls converging toward. the outlet end thereof, an intermediate chamber having walls converging forwardly toward-said compression chamber and communicating therewith and. a rotatable helical compression element extending within said chambers, said compression-chamber having a plurality of drainage apertures for removal of water therefrom, -said intermediate chamber having aplurality of drainage'slots' whereby water expressed from material. Withinsaidcompression ,chamber will .fiow continuously'toward said intermediate chamber and the drainageslots thereof, said compression chamber having a {plurality s'of spaced longitudinalgrooves defining retaining surfaces for compressing, compacting and dewatering material urged thereagains't by said rotatable compression element, said compression chamber being formed from a plurality of chamber segments, wear-resistant inserts adjustably engageable between adjacent chamber segments and coextensive with each of said longitudinal grooves, and a discharge chamber communicat- 2. In combination with a continuous-flow de- I and said supporting bracket, whereby to vary the volume and flow of material through said discharge chamber and remove residual moisture therefrom.

3. In combination with a continuous-flow de watering press having a compression chamber, a discharge chamber communicating with said compression chamber, the discharge chamber comprising a pair of perforated side plates, a perforated bottom plate, a perforated hinge plate swingably mounted between the side plates and constituting the top member of the discharge chamber, said hinge plate being pivoted at its rear edge and having a spring seat on its upper face, a bracket located above the discharge chamber, a handle element threadable through said bracket, a head on the lower end of said handle between the bracket and spring seat, a coil spring having oneend operative against the head and its other end supported on the spring seat, and a return spring located rearwardly of the compression spring and having one end attached to the upper portion of the hinge plate v and its other end attached to the bracket,

HJALMAR S. MESSING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 271,398 Baker Jan. 30, 1883 641,266 Bussells Jan. 16, 1900 783,602 Wheelwright Feb. 28, 1905 787,483 Tompkins Apr. 18, 1905 1,005,472 Renneburg Oct. 10, 1911 1,049,834 Fiddyment Jan. '7, 1913 1,127,910 Molins et al. Feb. 9, 1915 1,221,054 Hyatt Apr. 3,191? 1,550,045 Power Aug. 18, 1925 1,752,054 Anderson Mar. 25, 1930 1,835,789 Lang Dec. 8, 1931 1,851,191 Lang Mar. 29, 1932 1,889,543 Coors Nov. 29,, 1932 2,235,819 Upton Nov.- 30, 1943 FOREIGN PATENTS Number Country Date 394,450 France Mar. 2, 1909 707,953 France Apr. 20, 1931 35,371 Germany Apr. 30, 1886