US478315A

US478315A - Feed-water heater

Info

Publication number: US478315A
Authority: US
Publication date: 1892-07-05
Anticipated expiration: 1909-07-05

Description

(No Model.)

J; DE VRIES. FEED WATERHEATER.

No. 478,316. Patented July 5, 1892.

age/523176.96; mJ pni'or%pr %2 gg/ ii0 UNITED STATES PATENT OFFICE.

JOHN DE VRIES, OF PASSAIO, NEW JERSEY.

FEED-WATER H EATER.

SPECIFICATION forming part of Letters Patent No. 478,315, dated July 5, 1892.

Serial No. 424,401. (No model.)

I same.

The object of this invention is to furnish an economical and eifective construction for feedwater heaters and one in which the water shall beforced positively through the entire circuit of the heating-tubes. In this construction the Water is also conducted through a settling-chamber before it is heated to the boiling-point.

The invention will be understood by reference to the annexed drawings, in which Figure 1 is a vertical elevation of the apparatus with the parts in section at the'center line where hatched. Fig. 2 is a plan of the tube-plate with acircle o to indicate the space in which the tubes are inclosed, and Fig. 3 an edge view of the same. Fig. 4 is a plan of the base with the tube plate and shell removed.

To illustrate the invention, a heater of certain capacity is shown, containing two sets of tubes, with seven tubes in the center set and five tubes in the outer set; but the heater may be constructed with three or more sets of tubes, and a greater number of tubes may be provided in each set Where the proportions of the shell admit of such arrangement.

a is the base, provided with supporting-legs b and flange c, to which the tube-plate d is attached by bolts 6. A cylindrical shell f is secured to the tube-plate by the same bolts passed through flanges g from the bottom of the shell. Steam circulates through the shell by an inlet-pipe h at the top, and an outletpipe Z near the bottom. The tube-plate is formed with four rows of tube-holes u and u, and the base is formed with four corresponding slots 70 k and ZZ. Two sets of arched or U-shaped tubes 25 and t are secured to their lower ends in the holes a and a, respectively, the tubes i being bent to arch over the tubes t, as shown in Fig. 1. The ends of the tubes are expanded in the holes of the tube-plate,

as is customary with tubular constructions, and the use of screw-threads is thus avoided, while the bending of the tubes into arch form secures a continuity of each tube from one end to the other, and thus avoids the risk of leakage by any form of coupling. The cylindrical shape of the shell accommodates seven of the tubes t with five of the tubes t arched over the same. The base is cored out to connect the slots 70 and Z, passages 0 being formed through the metal beneath the slot it. An outlet at is connected with the slot Z, and the tube-plate is secured upon the base with an' intervening packing p, which connects the lower ends of the pipes positively with the several slots.

With the construction described, the feedwater entering by the inlet m passes upward through the slot 70 into one leg of all the tubes 25 and downward through the other leg and slot 7o into the slot Z. The water thence enters one leg of all the tubes t and passes downward through the other leg into the slot Z' and thence outward by the pipe 71.. A settling-chamber q is formed in'the base beneath the sloth, and the passages'o are extended from such chamber aboveits bottom into the slot Z, thus permitting the movement of the water through the chamber from the tubes '25 to thetubes t without disturbing any sediment that may settle in the bottom of the chamber. A cock r isprovided to blow 01f the sediment from the chamber q. The steam in the shell f heats the tubes 25 and Z equally, and the movement of the feed-water through the tubes 15 obviously heats it in a partial manner only before it reaches the settlingchamber, and the sediment which is precipithe chamber before the water reaches a boiling-point. The water moving from the settling-chamber to the tubes 25' is subsequently heated in a higher degree before it is discharged by the pipe a.

It is obvious that three or more sets of tubes may be used instead of two by forming additional pairs of slots outside of the slots Z Z and providing suitable passages to connect such slots in a proper manner. The essential part of the invention is the formation of the base with supporting-feet and with the settated by such heating is thus deposited in tlingchamber and required slots cast directly therein, one of the central slots being connected with the Water-inlet m and an adjoining central slot being connected with the settling-chamber so as to receive the sediment when the Water is partially heated. \Vith this arrangement the precipitate isdeposited in the settling-chamber While the Waterpasses in succession through all the sets of tubes.

hat I claim as my invention is:-

1. The combination, in a feed-water heater, of the shell f, provided with steam-pipes h and 2', the tube-plate (Z, having the U shaped tubes secured therein, as described, and the base a, provided with supporting-feet and cast with the settling-chamber q and the slots therein,

as set forth, one of the central slots 7: being my hand in the presence of two subscribing connected with the water-inlet m and the adjoining slot 7c being connected with the settling-chamber q and the slot Z and one of the outer slots being connected with the Waterontlet a, and the settling-chamber being provided with the blow-off cock 0", the Whole arranged and operated substantially as set forth.

2. The combination, in a feed-Water heater, of the shell f, provided with steam-pipes h and z', the tube-plate cl, having the U shaped tubes it secured therein as described, and the base a, provided with supporting-feet and cast with the settling-chamber q and the slots 7t 70 and ll, as set forth, the slot 7a being connected with the Water-inlet m, the slot 70' being connected with the settling-chamber q and by the passages 0 with the slot Z, and the slot Z being connected with the water-outlet n, and the settling-chamber being provided With the blow-oft cock 0', the whole arranged and operated as herein set forth.

In testimony whereof I have hereunto set Witnesses.

JOHN DE VRIES. Vitnesses:

THos. S. CRANE, L. LEE.