US429417A - Apparatus for recovering soda - Google Patents

Description

(No Model.)

H. BURGESS. APPARATUS FOR RBGOVBRING SODA.

Patented June 3, 1890.

UNITED STATES PATENT Y OFFICE.

HUGH BURGESS, OF ARDMQRE, PENNSYLVANIA.

APPARATUS FOR RECOVERING SODA.

SPECIFICATION forming part of Letters Patent No. 429,417, dated June 3, 1890.

Application filed September 23, 1889. Serial No. 324,722. (No model.)

To aZZ whom it may concern:

Be it known that I, HUGH BURGESS, a subject of the Queen of Great Brit-ain, and a resident of Ardmore, in the county of Montgomery and State of Pennsylvania., have invented a new and useful Improvement in Apparatus for Evaporating and Calcining Solutions; and my invention consists in certain novel apparatus and combination of apparatus, of which the following is a true and exact description, due reference being had to the drawings which accompany and form part of this speciiication, and in which similar letters denote similar parts.

lNIy invention relates to that class of apparatus in which the liquid is evaporated in a rotary evaporator subject to direct action of the heat, and the semi-liquid is then passed from this evaporator into a rotary incinerator; and it consists, essentially, of interposing a water-back between the rotary evaporator and rotary incinerator, so as to avoid the direct action of a too great heat at the mouth y of the evaporator.

It also consists in the interposition of a lip between the evaporator and incinerator by which the liquid is carried from the evaporator into the incinerator. This lip is a waterlip-that is, water is caused to pass through it, so as to keep its temperature below melting-point.

In the drawings, Figure l is a longitudinal sectional view of my improved apparatus.

Fig-.2 is a section on line :c w, Fig. l, in direc-l leads from the fire-chamber, so that the products of combustion are provided with afresh supply of heated air to cause a more perfect combustion in the incinerator of the gases from the furnace A and those generated in the incinerator by the combustion of the organic matter in the incinerated mass.

C is a water-jacket, the water passing continuously through the pipe e4 and passing out through the pipe e3. This water-jacket forms the subject-matter of an application already iiled by me, and therefore is not claimed in this application. The flue B and air-passage c4 both pass through the water-jacket O. Y

D is a rotary vessel, preferably made cylindrical. This cylinder D may be constructed of a plate or cast-iron shell lined in the interior with lire-brick, and is rotated by means of a sprocket-chain from the source of power operating upon the sprocket-wheel d. This cylinder has'projecting bands dwhich rest upon the friction rolls or wheels d4.

E is a water-jacket interposed between the cylinder D and the evaporator F. This water-jacket is supported by means of the rods c, which are secured at one end to the lugs e on the water-jacket and at the other end to beams or other suitable support above the cylinders. This water-jacket is so supported that it rests between and in line with the two cylinders and has the opening or passage e2 for the products of combustion to pass through.

e3 is the inlet-pipe for the water to the water-jacket and e4 the outlet-pipe for the water-jacket. Water is constantly passed through this jacket.

F. is the` water-lip by which connection is made between the cylinders D and F, the liquid reduced in the evaporator F passing by means of this water-lip from the evaporator to the incinerator D. This water-lip may be supported either as shown in Fig. 2 yor as shown in Fig. 3. In Fig. 2 the water-lip is supported by the supports e5, which rest upon the base upon which the apparatus is support-ed. In Fig. 3 the water-lip E is secured to the water-jacket E by means of bolts or water-connection c5. In the latter case the water-lip is in direct watercommunication with the jacket E. In Fig. 2, which represents the water-lip not in water communication with the jacket E, the water is circulated IOO greater length than cylinder D. This cylinder is rotated by a sprocket-chain from the source of power operating` upon the sprocket f2, Surrounding said cylinder F. This cylinder F has the projecting bands f4, which rest upon the friction pulleys or wheels This cylinder maybe constructed in the manner described for cylinder D. G is a tube leading from the funnel g to said cylinder F.

H is a pipe leading from the liquid-reservoir I to the funnel g.

As shown in the drawings, F is the rot-ary evaporator and D is the rotary incinerator.

K is a iiue to ca-rry off the products of combustion to the stack or chimney 7b'. The products of combustionA from the furnace pass through the cylinder D, through the opening in the water-jacket, and` into and through the cylinder F-and flue K and escape through the stack or flue 7c.

The operation is as follows: The lire-brick or furnace A and water-jacket are brought to the face of the cylinder D and water passed through the water-jacket E and water-lip E', and the cylinders D and F caused to rotate. The spent or other liquid to be treated is admitted through the funnel g and into the cylinder E, and the products of combustion passing through this cylinder, as hereinbefore described, cause an evaporation ot the waste from the liquid, increasi ng its specific gravity. The rotation of the evaporator F di ifuses the liquid around the interior surface and brings it into contact with the heated gases passing through the evaporator. The cylinder F is slightly inclined, as shown in the drawings, so that the liquid will move slowly through it, and it is obvious that the same object can be attained if the exterior of the cylinder be in a horizontal line and the interior be slightly flaring. The liquid greatly concentrated by the treatment in the rotary evaporator passes over the water-lip E into the incinerator D. The water-jacket E, which is interposed between the rotary I) and the rotary F, prevents a too great action of the heat at this point, which is very desirable, as in many cases if this jacket were omitted the heat would be so great that the brick-work ot' thev evaporator would become too highly heated at its edge next to the incinerator. The incineration of the liquid is completed in the rotary D, and the solid residue is delivered at the open space below the water-jacket C. The object of the use of the water-jacket E and the water-lip E interposed between the two rotaries has been fully described hereinbeiore, and its advantages are obvious. The incinerated material passes out from the bottom of the incinerator D at the point L into thc reservoir I, from which it can be removed for such further use as is desired. The two rotaries are shown in line, but they can be placed at any desired angle with each other, provided that the liquid from the first rotary is delivered into the second rotary, and I can use a number of evaporators in connection with acommon incinerator; or I may use several evaporating-cylinders connecting with each other and with an incinerator.

I do not intend to limit myself to the specie means described for rotating the cylinders. It is preferable, though not essential, that the incinerator and evaporator should be rotated at different speeds, the evaporator being the more rapidly rotated cylinder. It is preferable that the incinerator should be of greater diameter than the evaporator. lVith some classes of liquids it is essential that the completion of theoperation should take place farthest from the source of heat, in which case the apparatus will be reversed, and the incinerator placed the farthest from the furnace A, when the evaporator will be the cylinder contiguous t0 said furnace.

My apparatus is especially advantageous for recovering waste alkaline from spent liquids produced in making paper-pulp; but it can be used with equal advantage for the recovery of any valuable solid matter from a liquid or semi-liquid.

I do not claim in this application the combination of a rot-ary evaporator and a rotary incinerator, said evaporator opening into said incinerator, whereby the liquid is increased in specific gravity in the evaporator and iiicinerated in the incinerator; nor do I claim in this application the combination of a rotary evaporator and a rotary incinerator, a combustion-chamber between said evaporator and said incinerator, both said evaporator and incinerator opening into said combus tion-chamber, as these claims form the subject-matter and are specific claims in a certain application filed by me November l0, 1888, Serial No. 290,452.

Having now fully described my invention, what I claim, and desire to protect by Letters Patent, is

1. In combination, two or more rotary cylinders, a furnace in front of the mouth of one ot said cylinders, and a water-jacket interposed between said rotary cylinders.

2. In combination, two or more rotary cylinders opening into each other, a furnace in front of the mouth of one of said cylinders, and a water-jacket interposed between the mouths of said rotary cylinders.

In combination, two or more rotary cylinders, a furnace in front of the mouth of one of said cylinders, said cylinders opening into each other, and a water-jacket interposed between the mouths of said cylinders, the products of combustion from the furnace passing through said cylinders and water-jacket.

4. In combination, two or more rotary cylinders, aiurnaee in frontof the mouth of one of said cylinders, and a water-lip connecting said cylinders one with the other.

5. In combination, two or more rotary cylinders, a furnace in front of the mouth of one of said cylinders, a water-lip connecting said IOO IIO

cylinders one with the other, and a waterjacket interposed between the mouths of said cylinders.

6. In combination, two or more rotary cylinders, a furnace in front of the mouth of one of said cylinders, water-lips connecting,` said cylinders one with the other, and water-j ackets interposed between the mouths of said cylinders, the water-lips being secured to the water-jackets respectively.

7. In combination, two or more rotary cy inders, a furnace in front of the mouth of one of said cylinders, a water-jacket interposed between the furnace and the mouth of said cylinder, water-lips connecting` said cylinders one with the other, and water-jackets interposed between the mouths of said cylinders.

In testimony of which invention I have hereunto set myhand, at Philadelphia, Pennsylvania, this 13th day of September, A. D. 1889.

HUGH BURGESS.

l/Vitnesses:

ABNER J. DAvIs, JAMES H. SHIELDS.

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