Specification of Joseph Johnson and Joe Cliffe : furnaces.

  • Johnson, Joseph
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Joseph Johnson and Joe Cliffe : furnaces. Source: Wellcome Collection.

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    Johnson <$• Cliffes Impts. in Furnaces, or in the Means of Consuming Smoke. The ends of this arch are also open to the side channels /,/, so that a perfect circulation of air may take place. The heated air from this arch g rushes out, as shewn by the arrows, through openings g* made in the under side thereof, and acts upon the combustible gases that are passing from the fire-place through the spaces j, j, j, between the hollow fire tiles or bricks i, L Upon 5 referring to Fig. 3 it will be seen that the side passages are continued beyond the hollow arch g, and terminate at a hollow fire bridge k, which they supply with heated air for the purpose of causing the same to issue into the flue, and act upon and consume such combustible gases as may have passed the arch <7, g. This is a precaution which may be employed at the discretion of the engineer 10 or constructor, but when it is adopted it will be found advisable to divide the current of air in the side channels f f into two parts, by means of a longi¬ tudinal partition, as seen at l in Fig. 3. In cases where it may be thought desirable to increase the draft and purify the products of combustion, the incom¬ bustible gases may be drawn from the flue by means of a fan or exhauster, or 15 other means, and conducted into a chamber as at m, Figures 1 and 2, where the gases may be operated upon by jets of lime water or other chemical agents. Fig. 6 is a longitudinal vertical section of a cylindrical tubular boiler with our improvements adapted thereto. Fig. 7 is a horizontal section of the same ; and Fig. 8 is a transverse vertical section, a, a, is the boiler or water space, 20 and b, b, the furnaces or fire-places, of which there are two, consequently all the parts connected with the smoke consuming apparatus are in duplicate. The fire bridge at the back part of the fire-place is seen at c, c. In this instance the atmospheric air is represented as being admitted to the hollow annular space or arch g, g, by means of a channel or flat pipe e9 e, wdiich is 25 placed along the bottom of the ash-pit. The arched chamber d, d9 and longi¬ tudinal channels or passages f /, of Figures 1, 2, 3, 4, and 5, are therefore dispensed with, and the air is heated in its passage through the channel e and lower part of the arch g before it passes out of the arch and mixes with the combustible gases. The flat pipe e, e, communicates with the hollow annular 30 space or arch g, as seen best in Fig. 8. On the under side of the upper part of this arch openings n, nf are made for the purpose of allowing the hot air to rush out and act upon the combustible gases, and any portion of such gases which may pass through the arch unconsumed will come in contact with a second current of heated atmospheric air which issues from the hollow fire 35 bridge k, which is supplied with air in a somewhat similar manner to that already described in reference to Figures 1 and 3. In Figures 9, 10, and 11 we have shewn our improvements as applied to a marine tubular boiler. In this instance the atmospheric air is admitted to the
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