US240197A - Feed-water heater - Google Patents

Description

(No Model.)

A. J. STEVENS. Peed Water Heater.

Patented April 12,188!

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PATENT FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 240,197, dated April 12, 1881.

Application filed August 6, 1880. (No model.)

To all whom it may concern Be it known that I, ANDREW J. S'rEvnNs, of Sacramento, in the county of Sacramento and State of California, have made and invented a new and useful Improvement in Feed-Water Reservoirs and Heaters for Steam- Boilers; and I do hereby declare that the following is a full, clear, and exact description of my said improvement, and the manner of applying and using the same, reference being had to the accompanying drawings.

This invention relates to that class of feedwater reservoirs and heaters of the nature of a separate cylinder or chamber located within, and out ofcontact with, the boiler, and adapted to cause the feeding of the water into the boiler at a raised temperature.

My invention consists in a novel device for introduciugand supplyingteed-water to steamboilers, and it has for its object to keep the feed-water from contact with any part of the shell or tubes of the boiler as it is supplied by the pumps, by which I prevent incrustation or deposit of sediment upon the tubes and surface of the plates, and also avoid irregular and llll proper expansion and contraction of the shell and tubes of the boiler.

To such end and purposes I apply and combine to and with a steam-boiler and within the space inclosed by its shell, but detached and separate therefrom, a reservoir into which I introduce and supply the feed-water, and from this reservoir 1 cause the Water to flow into the boiler and mingle with the body of water therein, as required, after its temperature is raised. Such reservoir I supply with water from feedpumps in the usual manner, and I also provide therewith a means for readily removing and cleaning out the sediment or solid matter of any kind that may be carried in and deposited by the feed-Water, as will be all more fully described hereinafter.

In the accompanying drawings, I show in Figure 1 the application of my invention to a locomotive or portable boiler, and in Fig. 2 an end View of the same, taken from the front or left-hand side of Fig. 1.

I construct this reservoir of a cylinder, A, closed at one end and provided at the other end with a head, B, which may be removable, and this cylinder I insert into the boiler through an opening in the tube-sheet, so that it shall extend into the space at the upper part of the boiler above the tubes and have a level position therein. I secure the forward end of the cylinder to the tube-sheet by means of bolts that pass through the flange of the head B, and I support the cylinder in the boiler by means of straps or brackets D D, depending from the upper part of the shell, or in any other suitable way by which the cylinder is properly held in a level position without being directly and permanently secured or attached to the shell of the boiler at any part thereof. At and in the head of the cylinder I provide connections E for supply-pipes Fleading from the feed-pump, and at the opposite end I provide for the discharge and flow of the feedwater into the boiler by means of holes or apertures Gmade in and along the upper part of the cylinder. When such reservoir is arranged in a boiler it is not in contact with the surface of the shell or the tubes at any part, and the feed-water supplied to the cylinder is kept separate from the water in the'boiler until its temperature is raised, and this elevation of temperature is produced and insured by causing the feed-water to traverse the length of the cylinder to the openings G at the discharging end before it can enter the boiler.

As the feed-water in this reservoir is subjected to the heat from the boiler, it parts with and deposits its sediment while lying in the reservoir, so that the water passing out through the openings Gr is comparatively in apure condition or has parted with the greater portion of its solid matter. To provide, therefore, for cleaning out and removing such matter that may accumulate in the cylinder A, I arrange a blow-oft pipe, H, with the cylinder extending from one to the other end along and at a short distance from its bottom surface. In and along the bottom of this pipe are holes or apertures t', facing the bottom surface of the cylinder, and to its front end, at the head of the cylinder, are connected suitable blow-01f pipes and cook J outside of the boiler. This pipe H is fitted into the head B of the cylinder, so that it may be readily withdrawn, whenever it is desired to more thoroughly clean and wash out the cylinder by taking off the head. By this improvement I keep the feed-water from coming in contact with any part of the boiler or tubes as it is first fed to the boiler, and I cause its temperature to be raised before it mingles with the main body of water, so that I separate and retain in the reservoir the sediment and solid matter which without this arrangement would be deposited upon and aroundthe boiler-shell and its tubes.

In applying my improvement to a locomotive-boiler, I employ two of these reservoirs, as illustrated in Figs. 1 and 2 of the drawings above referred to.

Having thus fully described my lnvention, what I claim, and desire to secure by Letters Patent, is-

1. The combination, with the perforated chamber or reservoir A, located within and out of contact with the boiler, of the pipe H, having a blow-oft cock and pipe, J, and aper- ANDREW J. STEVENS.

In presence of- JOHN RAFFERTY, JAMES BOLAND.

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