US939540A - Boiler-compound mixer and feeder. - Google Patents

Description

T. E. PALMER & W. W- BAKER.

BOILBR COMPOUND MIXER AND FEEDER.

APPLICATION FILED MAY 24, 1909.

. 939,540, Y Patented Nov. 9, 1909.

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T. E. PALMER &. W. W. BAKER.

BOILER COMPOUND MIXER AND FEEDER.

APPLICATION FILED MAY 24. 1909.

Patented N0v.'9, 1909.

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THOMAS E. PALMER Ann WILLIAM w. BAKER, or Enwoon, INDIANA.

BOILER-COMPOUND MIXER AND FEEDER.

Specification of Letters Patent.

7 Patented Nov. 9, 1909.

Application filed. May 24, 1909. Serial No. 498,047.

To all whom it may concern:

Be itknown that we, THoMAs E. PALMER and WILLIAM W. BAKER, citizens of the United States, residing at Elwood, in the county of Madison and State of Indiana, have invented certain new and useful Improvements in Boiler-Compound vMixers and Feeders; and we do declare the following to be a full, clear, and exact description of the invention, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification.

This invention relates to apparatus for mixin chemical compounds and also apparatus or feeding the compounds into water to be converted in boilers into steam, the invention having reference particularly to apparatus for mixing the class of compounds, the ingredients of which are liable to -sep arate when not agitated.

The object of the invention primarily is to provide improved apparatus whereby boiler compounds may be thoroughly mixed economically and fed as required to the water that is to be used in the boilers, for the purpose of improving the quality of hard or otherwise bad water for boilers.

With the above mentioned and other objects in view, the invention consists in apparatus of novel construction and arrangement for automatically mixing and feeding boiler compounds, as requiredfor use; and the invention consists further in the parts, and combinations and arrangements of parts, as

hereinafter particularly described and then pointed out in the accompanylng claims.

Referring to the drawings, Figure 1 is a side elevation of a steam-boiler and its furnace having the improved compound mixer and feeder connected therewith, and illustrating the manner of delivering the feedwater and compound to the boiler; Fig. 2, a top plan'of the mixing and feeding apparatus; Fig. 3, an elevation of parts of the delivery line of pipe having a sight-feed glass connected therewith; Fig. 4, a fragmentary sectional elevation of parts of the apparatus on an enlarged scale; Fig. 5, a vertical central sectional view of the mixing tank and i apparatus therein; Fig. 6, a horizontal sectional view of the mixing tank and apparatus therein; Fig. 7, an inverted plan view of the jet-pipes comprising parts of the mixing apparatus; Fig. 8, a vertical sectional view of a regulating valve comprising a part of the mixing apparatus; Fig. 9, an elevation of the valve-regulating screw; and Fig. 10,

. a perspective view of one of the spring guides used in the valve construction.

Similar reference characters in the different figures of the drawings indicate like parts or features of construction referred to herein.

In the drawings, the numeral 1 indicates the furnace-wall; 2, the furnace, door; 3, a

boiler mounted on the wall; t, the smokebox; and 5, the steam-dome of the boiler, shown to illustrate the relative arrangement and functionof the invention.

Water may be supplied to the boiler by any suitable means, such as a pump having a steam-cylinder 6 and a water-cylinder 7 with a steam-chest 8 connected with the steam-cylinder, and a delivery-pipe 9 connected with the water-cylinder and also with the boiler, there being a steam-pipe 10 con" nected with the steam-chest and also with a throttle-valve 11 that is connected by a supply pipe 12 with thesteam-dome 5 of the boiler, the feed-pump receiving water from a well-pipe 13 or suction-pipe supplied from any suitable source, the pipe 13 being C011- nected by a pipe section 14 to which is connected a stop-valve 15 from which a pipe section 16 extends to the water-cylinder 7 of the feed-pump. In some cases a feedwater heater 17 is used, "in which case a pipe section 18 is connected with the pipe 13 and has a stop valve l9 connectedthereto from which extends a pipe section 20 leading to a stop-valve 21 which is connected with the heater 17, a pipe-section'22 extending from the heater and having a stop-valve 23 connected thereto from which a pipe-section 24 extends to pipe-section 16, so that if the valve 15 be closed and the valves 19, 21, and 23 opened, the water may pass from the Wellpipe through the heater to the pump. The heater is connected to a steam-supply pipe 25, and is provided with an exhaust pipe 26 as usual.

The invention comprises a mixing tank consisting of a side-wall 27, a bottom 28, and a cover 27, the tank being provided with suitable supporting legs 29, whereby the tank is supported at a suitable height for convenience in operation. The bottom of the tank has a nipple 30 extending through and attached thereto, the bottom being preferably reinforced by an annular plate 31 attached thereto and extending about the nipple. A nut is attached to the upper end of the nipple and has a strainer 33 attached thereto to strain the boiler compound that may flow from the tank through the nipple, the lower end of the nipple having a reducing coupling 34 thereon to which is connected a relatively small delivery-pipe A relatively small feed-pump is employed that comprises a steam-cylinder 36 and a water-cylinder 37, with a steam-chest 38 on the steam-cylinder that is connected with a steam-pipe 39 provided with athrottle-valve 40, from which extends a pipe-section 41 that is connected with the steam-pipe 10 of the boiler-feeding pump. A pipe-section 42 is connected with the water-cylinder 37 and has a nipple 43 connected therewith to which a regulating-valve 44 is connected. A pipesection 45 extends from the regulating-valve and preferably has a pipe-tee 46 connected thereto, the section 45 extending vertically to the tee, the tee having a pipe section 47 connected thereto, to which a valve 48 preferably is connected, a pipe-tee 49 being connected with the valve 48 and having a sight feed glass 50 extending downward there from and connected with a pipe-tee 51 from which extends a pipe-section 52 to the pipe section 20, so that the compound may be delivered either to the heater 17, or direct to the pipe-section 14 to pass with the feedwater to the boiler-feeder. A pipe-section 58 is connected with the pipe-section E20 and also with the delivery-pipe 9, and is provided with a stop-valve 54 so that if desired the compound may be delivered to the boiler with the feed-water without passing through the boiler feeder. A solid rod 55 is attached to the tees 46 and 51 to serve as a brace for the pipes to prevent accidental fracture of the sight-feed glass. It should be understood, of course, that the sight-feed glass may be omitted, if desired, and will be of service only when arranged at proper elevation, and the compound is delivered to a suction-pipe, being of no practical use if the compound be delivered in a solid stream di rect to the delivery-pipe 9 against the boiler pressure. A steam-pipe 56 is connected with the steam-pipe section 41 and also with the tee 49, and is provided with a valve 57, so that in some cases steam may be admitted to the sight-feed glass, in which case the rate of feed of the compound may be observed with the glass partly filled with the compound, and the upper part of the glass filled with steam, which result may be obtained with obvious manipulation of various valves above-mentioned.

In order to thoroughly and economically mix the boiler compound, a nipple 58 is con nected to the pipe-section 42 and has a valvecase 59 connected thereto, the valve-case having a valve-seat 60 therein on which is a valve 61 having a stem 62 suitably guided teases so that the valve may from the valveseat, the stem 62 havin a spring-guide (32% thereon on which a coil-spring (34 is seated. The valve-case has a head (35 provided with a yoke 66 in which a regulating screw (37 is mounted and extending through the head 65, the inner end of the regulating screw having a valve-guide (38 thereon against which the spring is seated. A packinggland 69 is employed with the head (35 and the stem of the screw (5?, and a lock-nut 70 is placed on the screw and normally bears against the yoke (36 for preventing accidental turning of the screw, the latter having a hand-wheel 67 on its outer end.. A pipe section Tl is attached to the valve-case 59 and extends through and is attached to the wall 27 of the mixing-tank. the inner end of the pipe-section 71. having a pipecross 72 attached thereto, to which the two ends of a curved jet-pipe T3 are connected, the pipe being arranged at a short distance above the bottom of the tank and the under side thereof having relatively small jet-holes, as T4, '74, therein, from which jets may be projected onto the bottom of the tank to agitate the heavier particles of the compound and insure thorough mixing thereof. A pipe-tee T 5 is connected also with the pipe-cross and has the two ends of a shorter curved pipe 76 connected thereto, so as to be concentric to the pipe 73, and having jet-holes as 7T, 7T, in the under side thereof from which jets may be projected downward toward the bottom 28.

The valve (31, as will be seen, is loaded by means of the spring 64, and the load may be increased or decreased by manipulation of the screw 67, and ordinarily and valve should rise when relatively low pressure, as for instance five pounds per square inch, is exerted by the pump against the under side of the valve, but if the compound is delivered against the boiler prr-xssure the spring 64 must be compressed, so as to exert a pressure on the valve slightly greater than the pressure maintained in the steam-boiler.

It will be understood that instead of employing all the various pipes for delivering the compound intothe delivery-pipe 9, either through the boiler-feeder or through the feed-water heater, any simple system of pipe lines may be employed for delivering the compound from the pipe-section 21-5 into the boiler.

In practical use, water and a suitable ingredient or ingredients to form a compound of a desired clniracter are placed in the mixing-tank, and the valve 40 being opened the compound feeding pump will operate to draw the compound through the pipe section and discharge it through the pipesection 42, and the valve 44 being opened slightly the compound will pass through the pipe section 45. The valve 44 should be valve 44 with the result that the valve 61- will open and permit the surplus or undelivered compound to pass through the pipesection 71 and be forcibly discharged from the jet-pipes 73 and 7 6 toward the bottom of the mixing-tank, for agitating the compound and keeping it well mixed while being fed to the boiler. The spring6 l may be more or less compressed inorder to increase the force of the jets when required for thoroughly agitating and mixing the compound on the bottom of the mixing-tank.

Having thus described the invention, what is claimed as new, is

1. Means for mixing and feeding boiler compound including a mixing tank, a forcepump, a supply-pipe leading from the tank to the force-pump, a discharge-pipe leading from the force-pump, a branch-pipe leading from the discharge-pipe to the tank and provided with a weighted valve to normally close the passage therethrough, a Valve for partially closing the discharge-pipe to create pressure therein for opening the Weighted valve, and a jet-pipe in the tank connected to the branch-pipe.

2. A boiler compound mixer and feeder including a mixing tank, a force-pump, a supply-pipe leading from the tank to the force-pump, a strainer in the tank over the opening of the supply-pipe, a dischargepipe leading from the force-pump, a branchpipe leading from the discharge pipe to the tank and having a valve-case connected therewith, a valve seated in the valve-case, a spring normally holding the valve to the seat, means for adjusting the tension of the spring, two concentrically-arranged curved jet-pipes in the tank connected with the branch-pipe, a valve connected with the discharge-pipe, and a sight-feed glass connected with the discharge-pipe.

In testimony whereof, we affix our signatures in presence of two witnesses.

THOMAS E. PALMER. WILLIAM W. BAKER.

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