US2540883A - Vertical acid sludge mill - Google Patents

Vertical acid sludge mill Download PDF

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US2540883A
US2540883A US635146A US63514645A US2540883A US 2540883 A US2540883 A US 2540883A US 635146 A US635146 A US 635146A US 63514645 A US63514645 A US 63514645A US 2540883 A US2540883 A US 2540883A
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mill
shaft
chamber
vertical
housing
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US635146A
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Robert C Hopkins
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Robert C Hopkins
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/08Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers
    • B02C18/10Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within vertical containers with drive arranged above container

Description

Feb. 6, 1951 R. c. HOPKINS VERTICAL ACID SLUDGE MILL 2 Sheets-Sheet 1 Filed Dec. 15, 1945 Roberf 61 Hopkins Feb. 6, 1951 R. c. HOPKINS 2,540,883

VERTICAL ACID SLUDGE MILL Filed Dec. 15, 1945 2 Sheets-Sheet 2 Fi 5 4 3 Roberl' C Hopkins Patented Feb. 6, 1951 UNITED STATES PATENT OFFICE 3 Claims.

The invention relates to rotary mills for the processing of acid sludge, and the like, and more particularly to a vertical type of mill in which the bearings are located entirely outside oi the milling chamber.

In the processing of fuels made up of acid sludge, a refinery by-product, it is found that this is not only the most corrosive substance encountered anywhere in the industry, with the exception of nitric acid pickling solution, but that it i also errosive on account of the near solids contained in the acid sludge mass.

Applicant has patented, and has in operation, a number of types of horizontal mills, but it has been found by experience that the bearings and shaft of such mills wear out from the combined action of the acid and the solids, or near solids, contained in the acidulated sludge.

The object of the present invention is to provide a mill for the processing of acid sludge, bunker C oil and similar materials, which will overcome the above mentioned difiiculties and disadvantages in the use of the present types of mills.

Another object is to provide a mill of this character in which the bearings are located entirely outside of the milling chamber so as not to come into contact with the acid sludge or other material being processed in the mill.

A further object is to provide a rotary mill in which oil under pressure is circulated through the bearings.

Still another object of the invention is to provide such a mill in which oil under pressure is forced through the packing chamber surrounding the shaft at the outlet end of the mill, setting up a pressure to resist the out-flow of the acid sludge from the mill through the packing chamber.

A further object is to provide a vertical mill in which the pressure in the milling chamber is upward thereby relieving the bearings of a portion of the load.

A still further object is the provision of a mill of the type referred to in which the parts subject to vibration are low enough upon the foundation to prevent any troublesome vibrating condition.

Another object is to provide a vertical mill adapted to any kind of motor drive or vertical steam turbine drive and which may be belt driven as well as directly by the motor.

Still another object of the invention is to provide a mill of the type referred to in which all parts are easily accessible for inspection, adjustment or repair.

The above objects, together Will others which will be apparent from the drawings and following description, or which may be later referred to, may be attained by constructing the improved vertical acid ludge mill in the manner illustrated in the accompanying drawings, in which;

Figure l is a side elevation of a mill embodying the invention;

Fig. 2 a top plan view of the mill shown in Fig. 1;

Fig. 3 an enlarged, vertical, longitudinal, sectional view through the milling chamber and bearings; and

Fig. 4 a transverse sectional view through the milling chamber, taken as on the line 4-4, Fig. 3, and drawn on a larger scale than Fig. 3.

The mill is mounted within an upright frame, indicated generally at l0, and the vertically disposed mill housing indicated generally at H, is shown supported upon the horizontal bottom plate 12 of the frame and having its lower end communicating centrally with the curved inlet passage 3, to which is connected an inlet pipe i4 leading from any suitable source of acid sludge, bunker C oil or other material under pressure which is to be processed in the mill.

The upper end of the mill housing H is pro vided with an eccentric discharge opening I5 communicating with the upwardly inclined outlet opening IB formed in the casting indicated generally at I7 and communicating at its outer end with the discharge pipe l8 through which the processed material may be conveyed to any desired location.

The casting IT includes a base portion I9 which is supported upon the upper end of the mill housing II and has the concentric packing box 20 formed thereon. A disc platform 2|, concentric with the base I9, is formed upon the upper end of the casting I! and has a concentric stufiing box 22 depending therefrom.

The upright cylindrical bearing chamber housing 23 is mounted upon the platform 2| and may be attached as by the screw 24 to an angular cross brace 25.

Upper and lower ball bearings indicated generally at 25 and 21 respectively are located in the upper and lower ends of the bearing chamber housing and a stufling box 28 may be provided at the upper end of the bearing chamber housing 23 and surrounding the vertical shaft 29 which extends longitudinally through the mill.

A collar or shoulder 30 is formed or fixed upon the shaft 29 in contact with the upper ball bearing 26 so that at least a part of the load or" the shaft, and milling apparatus to be later described, is carried. by this bearing.

The shaft extends downwardly through the bearing chamber and through the lower bearing 2'! and the stufiing box 22 and packing box 23, and the lower portion of the shaft is preferably reducedg-ini-diameterasat 3 i anol extends longitudinally entirely through the millhousingfil, terminating adjacent to the inlet end thereof.

' A rotary cutting unit is carried upon the reduced lower end portion of the shaft and may be in the form of a plurality of disc saws. For-this purpose a hub 32 may be fixed upon the. shaft as by the key 33. A shoulder 3% is formed upon the shaft, at the point where-'itis-reduced to engage the upper end of the hub to position the same relative to the shaft and an annular flange, 35,is formed upon the upper end of the hub.

Alplurality of ldiscsaws 135 is mounted upon the hub-,andextends from the flange to aipoint :nearZthe lowerend .ofthehub, at which point a iringffiange-S'i, may be located aroundthe hub and clampedqagainstthe adjacent end of the gang of disc saws as byanut 38 threaded upon the iloweriportionof thehub thus clamping the. gang of saws tightly between the flange i355 and the i ringnflangeifil. Anut-S'B may be'located-upon the threaded lower end portion 453 of the-shaft .fer lockingthenutfis inadjustedipositioniupon =-the h-ub.

A plurality of attrition chambers ii maybe io'rmediwithiwthehousingby means of longitudinal partition: walls 52' and: tranverse partition Walls Ed t extending qinward from I the housing to ia poi'ntclosely adjacentito theperipheries of the -gang of-rsaws 3t.

Forfthejpurpose of maintaining a constant ciricu lation"oidubricating .oil through and around ithe bearings as and Zlymeans may be provided itor-pumping oil-under pressure through the hearing chamber 2-3,-and'in the drawings this means sis:shownasan"oils'pump indicated generally at having ane' oil :pipe =35 connected thereto for pumping oil into the bearing chamber as at lt,

' "and al branch-of-sai'd. pipe for pumping oil above i the uppenlbearing 'tt; and. a return pipe for re- "turning 1 oil from -the bearing chamber to the pumpi i i.

fIfdesired, a pipe se may lead from the pump M 'or frcm a secon'd pu1np, ior pumping oilinto the ceritral portion or the packing chamber 629 in order to maintain a pressuretherein to resist itheput-fioiv of acid sludgearoun'd the shaft at the i upper end' of the mill housing and intothe packing chamber.

T-his 'vertical mill is adaptedto any kind of motorfidrive,=vertical steam turbine drive or may i beibelt driVen. Fo'r the purpose of illustration, a motor 59 is shownfdir'ectly{connectedto the tipper endof theshaft, preferably through a a'clutch' 5 i. A pressuregauge may be provided Lfor -the milling chamber as wellas a thermometer 53, and a sight gauge 56 may beprovided upon -the bearing=chamber to indicatethe oil level therein.

From theabove it will be evident that'the -up1zier -ball bearing Zficarries at-least a part of the weight-of the: shaft and the saw assembly, and part o f the-weight: thereof will be supported by' th upward-pressureof the material being rn-illeti *which enters =the mill at the lower end lubricant in the bearing chamber'has a tendency :to keep the lubricant in a state of uniform mixture as well as to hold it at a minimum tempera- -ture, the-' running shaft and bearings tending to warm up the lubricant while the circulating pump and the volume of oil act as a temperature adjustment. 7

.I. -cl-aim: V

1. Apparatus of the character described comprising avsupport, verticallyrspaced ball bearings carried bythe support, a bearing chamber enclosing the bearings an'd means "for circulating lubricant under 1 pressure through the bearing chamber, a'cantilever rotatable, vertical shaft having its upper end .portionjournalled in said bearings, the free end of the'shaft extending downwardly beyond the bearing: rotor mounted upon the freeendof: the, shaft, a housing enclosing the rotor, a packing 17box' surroundingthe shaft at the upper :end of the housing; means for admitting oil underipressure' to the packingjbox and means, for. passingliquid' upwardthrough: the

housing thereby-supporting a portion -of the load of the, shaft and rotor.

rotary mill including .a'vertical, cylindrical mill housing havinga central inlet at its lower end and an eccentricroutlet at its upper-end, a vertical shaftlocatedthrough the upper ,end of the housing :and terminating at-its lower end within said inlet 2" cylindrical gang ofdisc saws imounted upon the-shaftwithin the mill housing, -a-packing-box surrounding the shaitat the upper end of the housing, a platform surroundingthe i shaft; ,at-a point spacedv above said packing-box, means upon'the top. of -the housing supporting :the; platformiinspaced relation above said, packing 1 ,box pan uprighticylindrical 'bearingchamber mounted upon said platform and-surrounding the shaft, spaced :ball hearingsiiniopposite;-ends of the bearingi chamber, the shaft'being journa'lled in said ball bearings, a stufiing boxat each end of the bearing, chamber and, means for-maintaining :the abearing chamber filled with oil under pressure.

-3.;'A rotaryjmilli-including;a vertical, cylindrical mill-housinghavingagcentral inlet at its lower end g-and, an .eccentrici outlet tat; its 1 upper end, ;a

vertical shaft located through the upper-j end'of the housing a and iterminating at 1 its lower end Withinsai'd; in1et,-i@a jcylinidricahgang of disc" saws mounted; uponnthe: shaft Within? the; mill housing,

a packing box surrounding the shaft atthe: upper end of sth'e 'housingfa :platform surrounding the shaft sat :a pointi'spaced above-said. packing box,

" means upon :the topsof the housing supporting the platform in -spaced relation above said; packing box, an upright cylindrical bearing chamber mounted upon said-platform-andsurroundingthe shaft, spaced ball hearings :in opposite ends of i the bearing chamber, the :shaft being 3 journalled in said ball bearings, 'a' stuiiing box att-each' -end ing "the -bear ing cham-ber filled' with oil under pressure, and means for admitting oil under pressure to the packing box.

ROBERT C. HOPKINS.

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

UNITED STATES PATENTS Number Number 6 Name Date Austin June 1, 1926 Teague Apr. 12, 1927 Cuniff Jan. 1, 1929 Eppenbach Apr. 22, 1930 Raftson Jan. 15, 1935 Lord June 16, 1936 De Bethune Apr, 20, 1937 Bowen Dec. 28, 1937 Doering Oct. 4, 193 8 Fromm Dec. 13, 1938 Hopkins Jan. 27, 1942 Feight July 10, 1945

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021080A (en) * 1959-03-17 1962-02-13 Diamond National Corp Pulper
US3031745A (en) * 1959-06-01 1962-05-01 Dzialo Frank Machine and method for reclaiming tin cans and the like to be made into alloyed billets of tin and metal

Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1419285A (en) * 1920-02-19 1922-06-13 Continuous Centrifugal Separat Centrifugal decantation
US1431422A (en) * 1921-08-25 1922-10-10 Leonard E Randecker Pulp beater
US1515798A (en) * 1922-07-06 1924-11-18 Spensley Jacob William Grinding or disintegrating and mixing machine
US1561784A (en) * 1924-10-08 1925-11-17 Laval Separator Co De Nonaerating apparatus for centrifugally purifying liquids
US1587063A (en) * 1925-05-18 1926-06-01 American Creosoting Company Mixing, disintegrating, or homogenizing machine
US1624567A (en) * 1924-08-22 1927-04-12 Naugatuck Chem Co Machine for dispersing various solids and liquids
US1697052A (en) * 1927-10-29 1929-01-01 Colloidal Equipment Corp Disintegrating machine
US1755576A (en) * 1927-07-23 1930-04-22 Us Colloid Mill Corp Homogenizing mill
US1987944A (en) * 1930-06-07 1935-01-15 Raffold Process Corp Colloid mill and method of operating the same
US2044480A (en) * 1934-11-29 1936-06-16 Lord Frank Grinding machine for paper pulp
US2078065A (en) * 1935-06-01 1937-04-20 Bethune Gaston S P De Portable mixer
US2103887A (en) * 1934-02-16 1937-12-28 Bowen William Spencer Homogenizing mechanism
US2132099A (en) * 1934-08-23 1938-10-04 Doering Charles Method of and apparatus for purifying dairy products
US2140076A (en) * 1937-03-01 1938-12-13 Fromm Herbert Homogenizer
US2270946A (en) * 1940-02-09 1942-01-27 Robert C Hopkins Hydraulic blending machine
US2379957A (en) * 1942-06-02 1945-07-10 Jeffrey Mfg Co Grinder

Patent Citations (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1419285A (en) * 1920-02-19 1922-06-13 Continuous Centrifugal Separat Centrifugal decantation
US1431422A (en) * 1921-08-25 1922-10-10 Leonard E Randecker Pulp beater
US1515798A (en) * 1922-07-06 1924-11-18 Spensley Jacob William Grinding or disintegrating and mixing machine
US1624567A (en) * 1924-08-22 1927-04-12 Naugatuck Chem Co Machine for dispersing various solids and liquids
US1561784A (en) * 1924-10-08 1925-11-17 Laval Separator Co De Nonaerating apparatus for centrifugally purifying liquids
US1587063A (en) * 1925-05-18 1926-06-01 American Creosoting Company Mixing, disintegrating, or homogenizing machine
US1755576A (en) * 1927-07-23 1930-04-22 Us Colloid Mill Corp Homogenizing mill
US1697052A (en) * 1927-10-29 1929-01-01 Colloidal Equipment Corp Disintegrating machine
US1987944A (en) * 1930-06-07 1935-01-15 Raffold Process Corp Colloid mill and method of operating the same
US2103887A (en) * 1934-02-16 1937-12-28 Bowen William Spencer Homogenizing mechanism
US2132099A (en) * 1934-08-23 1938-10-04 Doering Charles Method of and apparatus for purifying dairy products
US2044480A (en) * 1934-11-29 1936-06-16 Lord Frank Grinding machine for paper pulp
US2078065A (en) * 1935-06-01 1937-04-20 Bethune Gaston S P De Portable mixer
US2140076A (en) * 1937-03-01 1938-12-13 Fromm Herbert Homogenizer
US2270946A (en) * 1940-02-09 1942-01-27 Robert C Hopkins Hydraulic blending machine
US2379957A (en) * 1942-06-02 1945-07-10 Jeffrey Mfg Co Grinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021080A (en) * 1959-03-17 1962-02-13 Diamond National Corp Pulper
US3031745A (en) * 1959-06-01 1962-05-01 Dzialo Frank Machine and method for reclaiming tin cans and the like to be made into alloyed billets of tin and metal

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