US1816757A - Heat transferrer - Google Patents

Description

July 28',- 1931. w. A. WHITE HEAT TRANSFERRER Filed March 18, 1929 3 Sheets-Sheet l IMAM Mfg l/vvelv-rag July 28, 1931.

w. Al WHITE HEAT TRANSFERRER Filed-March 18, 1929 5 Sheets-Sheet 5 25 boiler;

Patented July 28, 193i PATENT orrlcs 1 WILLIAM ALBERT WHITE, or HEBBURN, ENGLAND HEAT TRANSFERRER Application filed March 18, 1929, Serial NO. 348,000, and in Great Britain March 21, 1928.

The invention relates to heat-transferring devices of the kind in which heat is transferred'from one fluid to another, and though applicable generally, is particularly designed for the air preheaters of steam generators.

The main objects of the invention are to provide a'heat-transferring device of cheap simple construction which in addition can be readily repaired or overhauled.

With such objects, the present invention consists in the improved heat-transferrer cells, the improved heat-transferrers built up of such cells and the improved arrange ments of such'built-up heat-transferrers all as hereinafter described and particularly pointed out in the claims.

Referring to the accompanying draw- 1ngs:-

Figure 1 shows a perspective view of one form of heat-transferrer according to the present invention; 7

Figure 2 shows a front elevation of the heat-transferrer according to Figure 1 applied as an air preheater to a Scotch marine Figures 3, 4 and 5 show elevation, plan and side elevation of a modified form of heat transferrer, similarly applied as an air preheater, in which the air to be heated makes a plurality of horizontal passes through the transferrer at different levels; while finally Figures 6, 7 and 8 show similar views respectively of another form of heat transferrer, applied as an air preheater, in which the air to be heated makes a plurality of horizontal passes through the transferrer at the same level. j

The same reference symbols are used in the different figures to denote corresponding parts.

In'carrying the invention into effect according toone form suitable for transferring the heat of waste gases to air for combustion or otherwise, the heat-transferring device (see Figure 1) is built up of a series of openended unit sections or cells of like design, 2, 2, 2, bolted, riveted or otherwise secured together side by side as shown. Each cell is of flat box-like form open at the ends but 5 closed top and bottom as at 2a and 2b, and

having corrugated sides of large superficial area arranged with the undulations, 20, 2c, in approximate correspondence, the effect of such corrugations being on the one hand to increase the effective heating surface as compared with flat sides and on the other hand to increase the efficiency of heat transfer on account of the more turbulent air flow.

The top and bottom members, 2a and 2b, of sinusoidal contour to correspond with the corrugations may take the form of plates welded in place or they may be detachable, in which case they are preferably provided with checks or shoulders to limit the amount by which they enter as plugs into the sections, where they can be held in poistion by light bolts connecting the top and bottom members.

The top and bottom members, 2a and 2b, are transversely splayed or enlarged at their ends, as shown, so that when the individual cells are juxtaposed for attachment to one another, the adjacent corrugated walls are a certain distance apart, thereby leaving pas sages, 3, 3, from top to bottom.

There are thus two sets of passages at right angles through which the heated and the heating gases pass respectively, namely the passages through the individual cells, 2, 2, from end to end thereof and also the passages, 3, 3, between the walls of adjacent cells.

The individual cells may be of any size and number to give the capacity required.

7 In view of the fact that the sections are interchangeable, and in view also of the transversely splayed ends, damaged sections can readily be replaced without dismantling the entire apparatus.

As applied to a Scotch marine boiler, A, an air heater as described above may conveniently be arranged in two halves, B, B, in the uptake, (see Figure 3) the flue gases passing upwards through the passages, 3, 3, bet-ween adjacent cells to the funnel while the air from a fan enters at the centre, D, and passes hori- Zontally in parallel through the cells of' the two halves of the air heater, and by way of suitable ducts, E, E, to the Howden or other furnace fronts, F, F l InFigures 3, at and 5 a modified arrangement is shown accordingto which the air prethree tiers, B B B placed one above the other. According to this arrangement, the

cold air enters by way of the inlet, D, between the upper tiers, B B and passes at difierent levels successively through thetiers, B B

X B inopposite directions as shown by the I arrows in Figure 3, to the ducts, E, E, lead ng V the preheater.

to the furnace fronts. The fine ases as before flow in an upward direction through the passages, 3, 3, between adjacent cells, 2, 2, of

In Figures 6, 7, 8, yet another arrangement is shown, according" to which the preheater is halves as before, each half in effect being. divided into threesections, 13 ,13 B of the full depth available, the cold air entering at the centre, D, as before and flowing at the same levelsuccessively through the sections ,,.as shown in Figure 7, by the arrows, to the ducts, E, E. I o

Althougha specific application has been described above, the invention is nevertheless applicable generally to the transfer of heat from one fluidto another, and especially to the transfer of heat from one gaseous mediiyn to another;

Variations may be made in the details of construction of the apparatus without exce'eding the scope-of the invention.

Having now described my invention, what I claim as new and desire tosecure by'Letters Patents is o 1; As an article of manufacture,a self:

contained open-ended heat-transferrer cell having corrugated sides, and a top and a bot= tom member of sinusoidal contour secured thereto, to define the position'of said corru= gated sides.

2. As an article of manufacture, a self= contained open-ended heat-transferrercell havingcorrug ated sides, and a top and a bot tom member of sinusoidal contour secured thereto to dcfinethe position of said corru= gated sides, said top and bottom members diverging at the endsto splay out laterally the open ends of said cell, 7

v 3; Aheat-transferrer comprising a plural ity of like cells as claimed in claim 1, assem= bled side by side with their openends jnxta= posed; together with means for attaching said juxtaposed ends together.

a l. A heat-transferrer comprising a plural-- ity of like cells as claimed inclaim 2, assenrbled side by side with their splayed open ends juxtaposed together with means for at= taching said splayed open ends together.

. 5. An air-preheater for a steam generator comprising in combination an uptake for the furnace gases and disposed in said uptake two groups of cells as claimed in claim 1, said cells belng assembled side by side and said groups being spaced apart to provide a centhe cells of the two groups disposed adjacent to said central inlet; together with combustion-air ducts leading to the furnaces from the open ends of the cells of the two groups disposed remote from said central inlet.

- 6. An air-preheater for a steam generator, comprising in combination an uptake for the furnace, gases anddisposed saido u'ptake a plurality of groups of cells as claimed in claim I, said cells being assembled side by side; means eonnectingithe outlet of one group of cells to the inlet of the next group to cause combustion air to flow through said groups in series; together ,with. combustionducts leading to" thefurnaces from the outlet and of the last of said groups H I 7. An air-preheater for a steam enerator, ccmprising in combination an upta eforthe furnace gasesand disposed in said uptake at different levels a plurality of vgroups. ofEClls as claimed in claim 1, said cells beingassembled side by side; means connecting the outlet of one group of cells, to the inlet of the next group to cause combustion airto flow through said groups in series from; above downwards; together with combustion-air ducts. leading to the furnaces fromthe outlet end of the lowest of said groups. a o g In testimony whereof .I have signed name to this specification. p y I I WILLIAM WHITE.

- tral combustion-air inletto the open ends of

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