US1278155A - Boiling-machine. - Google Patents

Description

E. D. JEFFERSON.

BOILING MACHINE.

Patented Sept. 10, 1918.

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APPLICATION FILED JAN. 19. I917. 1,278,155.

OOOOOOOOOOOOOOOOOOO DOOOOOOOOOOODOOO OOOOOO OOOOOOOODOOO-OOOOODOOOOOOO OOOODOOOUOOOOOOOOOOOOOO 0000000000000000000000 foreign materials such sel 101 is a cage or hollow drum 103 whichis nuemvn D. JEFFERSON, or BOSTON, MASSACHUSETTS.

BOILING-MACHINE.

Specification of Letters Patent. Patented Sept, 10, 1918.

Application filed January 19, 1917. Serial No. 143,396.

T 0 all whom it may concern:

Be it known that I, EUGENE D. JEFFER? son, a. citizen of the United States, residing at Boston, in the county of Suifolk and State of Massachusetts, have invented certain new and useful Improvements in Boilinglilachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to boiling machines and more particularly to machines for boiling fibrous materials with alkaline solutions to prepare them for paper making.

accomplished by machines now in use. The

treatment in the machine also saponifies any oils present in the materials and eliminates as the .motes and hulls of cotton fiber.

The invention also relates to certain other features and comprises the features and combinations of parts hereinafter described and particularly pointed out in the appended claims. e

The machine of the present invention is disclosed but not claimed in my application Serial No. 1959, filed January 13th, 1915, for a method of treating fibrous materials,

which issued June 20th, 1916, as. Letters Patent No. 1,192,403.

The various features of the preferred form of the invention are illustrated in the accompanying drawings, in which Figure 1 is a view, partly in vertical section, of the boiling machine; and Fig. 2 is a vertical section of the boiling machine, taken on" the line 22 of Fig. 1. I

The machine illustrated in the'drawings is described as follows: The tank or vessel 101 is an air-tight horizontally disposed cylindrical drum which is rotatably supported upon standards 102. Within the vesrigidly secured in any convenient Way to the tank 101. The cage 103 is packed with the materials to be treated. The cage 103 is provided with a large number. of perforations 10st so that the liquor may freely pass through the walls of the cage. Between the tank 101 and the cage 103 are coils of steam pipe 105 by means of which the liquor in the drumis boiled. The cage 103 serves to keep the materials out of direct contact with the hot steampipes so as not to scorchthem. The steam enters through a steam supply pipe 106 and the condensed vapor runs ofi through the drip pipe 107. The pipes 106, 107 are provided with rotatable joints 108. The treating liquor and rinsing water may be run into the tank through a pipe 109 and runoff through an overflow pipe 110. The pipes 109, 110 are provided with rotatable joints 111 so that the tank may be rotated. The goods are packed in the cage 103 and are removed therefrom through manholes 112. The pipe 109 or 110 is preferably con nected with a safety valve, not shown, which prevents. dangerous pressures in the tank 101. The steam'which is admitted through the supply pipe 106 is preferably throttled by. an automatic throttling valve, not shown, which is controlled. by the pressure in the tank 101.

The treating liquor and the rinsing water coming into the tank through the pipe connection 109 pass into a hollow perforated pipe 113 which is centrally located in the cage 103 so that the goods may be thoroughly treated and rinsed. A retaining or baiile plate 130 is provided for the purpose of carrying the goods around with the drum when it is rotated.

The tank 101 is provided with a 13111-- rality ofairvents 120. Each vent consists ends of the levers 121. The tank is rotated in the direction of the arrow in Fig. 2. When a lever 121 strikes the stop 122. it

opens its vent valve 120 andv when a lever 121 strikes the stop 123 it closes its vent Consequently, the 'vents are valve 120. opened at the top of the tank and are closed at the bottom of the tank during the rotation of the-tank. This allows the air to escape from the top of the tank, but prevents the liquor il'roni escaping through the vents.

litter the goods are packed in ti .1 cage lo l the manholes 112 are closed and the tank is hall filled with the alkaline liquor. The tank is rotated and steam is let into the steam coils 105. The steam pipes 105 bring the liquor to a boil and the steam generated from the boiling alkaline liquor drives out the air. The stops 122 and are, during this time, held in the paths of the ends or the levers 121 so as to keep the vent valves open at. the top oi the tank and closed at the bottom. Batter the generated steam has ex e led the air from the tank the stop L2 is iilSL removed and then after the vents are all closed the stop is removed. The expulsion of the air from the tank is important in that the goods are not stwnfched or weakened by the oxidizing effect of air on the heated goods. While it is of particular inmortance to expel the air during the process or treating the goods in which the goods are lifted out of the treating liquor, it is also important and desirable to ex t the air from the tank during th' process in which the goods are treated with boiling alkaline liquor and the oods are not lifted out of the liquor. For example. the usual process in which the goods remain immersed in the liquor is improved by nxoviding the boiling koir or tank with vents which permitthe air to escape so that the goods at the surface oil the liquor are not chemica ly att'ected by oxygen.

(l is slowly rotated so that the The tank 1 liquor has a good chance to drain out of the goods which are lifted above the liquor level. The steam or alkali 'l'ume penetrates the goods and, as above pointed out, assist in the chen'iical reaction of discharging the color and whitening the goods. This chemical reaction is further accentuated by the drying eli ect or the steam or alkali fume in the area above the liquor. The steam is in contact with the heating coils 105 which are above the liquor level and these heating coils serve to dry the steam.

It will be noted that in the apparatus shown, the steam which is used for boiling the liquor does not come into contact with rue liquor but is carried through heating coils or a steam jacke. in this way the liquor level in the tank is not increased, nor is the liquor weakened, as is the case when boiling carried out by introducing the steam directly into the tank. Moreover, in the apparatus shown, the steam coils which are above the liquor level serve to superheat the steam, a thing impossible when the honor is boiled by the direct introduction or steam into it.

The successive and repeated innnersions of the goods in the boiling liquor with the consequent draining giic an ell'ective washg action. It will be seen that the cage in rich the goods are hold is spaced apart from the tank. This space between the cage and tie tank serves as a depository for dirt, gravel, precipitates from the chemical reactions, undissolved alkalis, and the like. 3 e cage is rotated so slowly that this h foreign material is not stirred up much, and,

. b, A preterred torm ot the invention having thus been described, what is claimed is:

1. A boiling machine, having, in combination, a rotatable tank. a for-animated cage supported within and rotatable with the tank, and heating nieai s distributed entirely around the inner periphery of the tank.

A boiling machine, having, in combination. a rotatable tank, a foraminated cagesupported within and rotatable with the tank, heating tubes distributed around the entire inner periphery of the tank, means to supply to and exhaust a heating medium from said tubes during the rotation of the tank, and an inlet and outlet tube for the tank by which the treating solution may be circulated through the tank during its continued rotation.

23. A boiling machine, having, in combination, a rotatable tank, a radiating heater secured within the tank, a series of air exhaust valves mounted in the tank, and i'neans for opening and closing the valves during the rotation of the tank.

+l. A boiling machine, having, in combination, a rotatable tank, a radiating heater secured within the tank, means for maintaining a surface of a. treating solution at approximately the center of the tank, and means located above the surface the solution for opening and closing the valves whereby the valves will only be opened while they are above the surface of the solution.

5 A boiling machine, having, in combination, a rotatable tank, a foraminated cage supported within and rotatable with the tank, and a series of heating tubes secured to the tank between the tank and the 6. A boiling machine, having, in combination, a rotatable tank, a series of: steam tubes secured to the inner periphery of the tank, a toraminated cage within the tubes for holding materials out of contact with the tubes, and means for supplying and exhausting steam from the tubes.

A boiling machine, having, in combination, a rotatable pressure-tight tank, a cage secured Within and rotatable with the tank, a foraminated tube mounted approximately in the axis of the cage, and connections With the tube for supply treating solutions Within the cage While it continues to rotate.

8. A boilin machine, having, in combination, a rotata 1e pressure-tight tank, a 0- raminated cage supported Within and rotatable with the tank, heating tubes distributed around the inner periphery of the tank and located between the cage and the tank, means for supplying the tubes With steam, means for circulating a treating solution through the tank during its continued rotation, exhaust valves mounted in the tank, and means for opening and closing the valves as the tank rotates.

EUGENE D. JEFFERSON.

Boyle: o! thll patent any be obtained for five cents each, by addressing the Commissioner of Patents.

Wellington, D. G."

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