Specification of Joel Benedict Nott : furnace with rotary cylindrical grate : tubular boilers : heating apparatus, &c.

  • Nott, Joel Benedict.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Joel Benedict Nott : furnace with rotary cylindrical grate : tubular boilers : heating apparatus, &c. Source: Wellcome Collection.

    10/20
    JVott's Improvements in the Construction of Furnaces for Generating Heat, <S{Cm generator, and also leaves the tubes easily accessible from the sides and ends, for the purpose of being cleaned or repaired ; for the latter purpose I make the side walls, or any convenient portion of them, 43, enclosing the tubes, removeable at pleasure. To facilitate the removal of these walls, I make each wall, 43, Fig. 40, front view, Fig. 41, section view, of two parallel metallic 5 plates, which I prefer to be iron, enclosing between them any suitable slow conducting material. I also place, in or near the bottom of the outer plates of the side walls, small moveable doors, 44, 44, Fig. 40, through which the slowly conducting material may be removed. Upon the upper plate 40 I flanch on . or securely fasten a vaulted chamber 45, Fig. 37, called the upper or steam 10 chamber, furnished with the usual openings, such as steam pipe 46, steam valve 47, gauge cocks and man-hole 49. Each tube opens above into this chamber, which is otherwise entirely closed. Upon the lower plate 40, I like¬ wise securely fasten another vaulted chamber 48, Figs. 37 and 39, called the lower chamber or water cellar. Each tube opens below into this chamber, 15 which is entirely closed, except at these openings, and two others called the feed pipe, 50, and a waste pipe, which last is only occasionally to be opened. The lower surface of the upper chamber, and the upper surface of the under chamber, are the boundaries in these directions of the current of heated air which passes between and amongst the tubes. The heated air is admitted 20 through an opening 41, in the front wall inclosing the tubes, communicating by a flue with the wind hole l, of the furnace before described ; in which case the flue plate O, Figs. 4, 13, and 14, before described, is dispensed with, and escapes through a hole 42, in the back wall to the chimney. Several groups of tubes, each furnished with a separate upper and under chamber, may be 25 placed adjoining each other and inclosed in common side walls, forming a con¬ tinuous passage amongst the tubes of all the groups for the heated air; the communication for the water from group to group being solely through the pipes 51, 51, Figure 37, leading from the upper chamber of each to the under chamber of the group next to it, and nearer the chamber of combustion. The 30 fresh water is admitted by the feed pipe 50, of the under chamber furthest from the furnace, and the steam emitted by the steam pipe 46, of the group nearest the furnace. In some cases, when slow evaporation is required, it may be allowed to take place from the whole of the upper chamber, which may there¬ fore be left open at the top for that purpose. M, Figure 37, represents the 35 rotary grate ; h, the body of the furnace; 16, the trunk, in which is a side aperture with its cover 52, for the purpose of supplying the furnace with fuel, and also within it a barrel 53, around which a chain is passed for raising the follower 18.
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