US112347A - Improvement in apparatus for evaporating and concentrating liquids - Google Patents

Description

UEIEEE STATES-- jEATEiv'r OFFICE.

JOHN HowAnTH, or SALEM, MASSACHUSETTS.

IMPROVEMENT IN'VAPPARATUS FOR EVAPORATING AND CONCENTRATI'NG LIQUIDS.

Specification forming part of Letters Patent No.A 112,347, dated March 7, 1871 antedated A March 1, 1871.

I, JOHN HOWARTIL of Salem, in the countyv of Essex and State of Massachusetts, have in- `ventedceitain Improvements in Apparatus for Evaporatingand ,Concentrating Liquids, of which the following isa specification: ,j

Figure 1 isa sideA elevation of myinvention. Figa 2 is a sectional elevation of the I column B, and Fig. 3 a plan view.

The object of this invention is to produce a rapid concentration andevaporation of liquids, such as sulphate of iron Sulphate of copper,&c.,

g with a view tothe crystallization of the same by theutiliz'ation of the utmost amount of heat employed 5 and it consists, mainly, cfa vertical column or reservoir f provided with two perforated transverse partitions and filled between the samewith coke or other porous material", below which `is a chamber or cistern connected with alpipe or fluefrom the smokebox of a steam-boiler,"the `products of comchamber or cstern, Gr, which is surmounted 'by a cylindrical column or tower, B. This latter is provided with 'a cap, F, from which passes a horizontal pipe,E.

Hrepresents the perforated bottom of column '13, .and K represents a circular pan or vessel,

provided with a perforated bottom, It, and legs 7c', which rest on the top of column B, leaving spaces h between the vessel K and column B. The space between perforated bottom H and vessel K is filled with coke or other porous material. Between the vessel-K j and cap F is an annular space', f.

, "P represents `an injector patented by me i March 1,1870,inclosed in the pipe E, and connected with the boiler A by a pipe, S.

' The pipe E terminates inthe Haring portion E', which communicates with the parallel pipes O. These latter are located in the bottom of the tank C, and pass through the saine, as

shown in Fig. 3. rIhe tank C is divided into three compartments, G1 G2 C3, the part C1 be- `ing connected to C2 by a Siphon-pipe, V, and

O2 to O3 by Siphon-pipe V. l

. Y Operation.

The steam generated in the boiler A is transmitted' through the pipe S to the injector P, and, rushing through the same and tube E, exhausts the air from the columnB, the latterybeing partially filled with coke, as above described. The exhaustion of the columnB will cause the heated products of combustion from boiler A to rush through pipe D into chamber G-and upward through column B into vpipe E, where it mingles with the steam from injectorP, and is forced through pipes O, superheating the steam, and passing out of the opposite ends of` said pipes into the air. The `fluid tobe treated is placed in the compartment G1 of tank C, from whence it Hows same, its volatile portions are evaporated by the heated products of combustion which are passing upward, as above described. After passing through the column the concentrated fluid falls through the perforated bottom H into the chamber G, from whence it may be drawn into suitable vessels for crystallization. In case, however, the iluid is not sufficiently concentrated, it may be pumped back into the compartment Gand be allowed to pass through the column again. This operation may be repeated as often as the nature of the fluid requires. f Y

The porous filling in the column B presents a wide extent of heated surface to the fallin g liquid, while the material readily absorbs heat from the products of combustion. Charcoal, pumice-stone, brick, wood chips, or shavings, Ste., may be used in place of coke;l but I prefer the latter.

The object of the subdivision ofthe tank G is to insure the uniform heating of the fluid to a given degree, and the division C, being nearer the outer ends of pipes O, does not receive as much heat as the division G2, at which point the temperature is highest, and wherein theiluid is heated to the temperature which it is necessary to have before it ilows into the column B.

The apparatus is designed for the treatment of lluids which are not injured by contact with the products of combustion, such as sulphate of iron, sulphate of copper, Sac., while for iuids which are liable to injury from such contact, I employ an apparatus which is the subject of a separate application of the same date.

It will be seen that from this arrai'igement I derive a twofold use of the heated products of combustion: first, in heating1 the iiuid as it percolates through the porous filling of the column B, and, second, in heating the uid in the divisions Cl C2 of tank G by passing, together with the steam from injector I, through pipes O.

The tank C must be constructed of sufficient length to derive all the heat from the waste products passing through pipes O that can be practically absorbed.

The transferring of the liquid from one division of the tank C to another by means of the siphons serves to precipitate impurities contained therein before passing intothe evaporating-column.

Having thus fully described my invention,

what I claim as new, and desire to secure by Letters Patent, is

1. .The combination of the boiler A, pipe D, and cistern G, substantially as described.

2. The combination of the boiler A, pipe D, cistern G, and column B, substantially as described.

3. The column B, having perforated bottom H and perforated vessel K, and cap F, as and for the purpose set forth.

- 4. The combination of the injector P, pipe S, boiler A, pipe D, cistern G, and column B, substantially as described.

5. The combination of the last combination with the pipes E E and tank C, substantially as described.

6. The tank C, constructed in compartments U1 C2 C3, connected by Siphon-pipes VV', and having pipes O running through the bottom, substantially as described.

7. The combination of the tank C, constructed substantially as described, pipe n, and column B, bywhich means I precipitate the impurities contained in the hot liquid to be evaporated, and whereby this liquid is purified before passingto and through the evaporatin gcolumn, thus securing the greatest economy of the evaporating agent.

S. The combination of the steam and the waste products of combustion, and by the means substantially as described, for heating and evaporating liquid-s.

9. rIhe process described, whereby I am enabled to use the heat from the waste products 4 of combustion twofoldthat is, in heating the liquid in tank C and in evaporating or concentrating the saine liquid when passing through the column B, the porous lling of which is first heated by the products of combustion passing through the coke or other agent on its way to the pipes in the bottom of tank C, substantially described.

In testimony whereof Ihave signed my name to this specication in the presence of two subscribin g witnesses.

JOHN HoWAn'rH.

Witnesses:

CARROLL D. WRIGHT, CHARLES F. BROWN.

Images