(19) |
 |
|
(11) |
EP 0 351 247 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
|
25.04.1990 Bulletin 1990/17 |
(43) |
Date of publication A2: |
|
17.01.1990 Bulletin 1990/03 |
(22) |
Date of filing: 14.07.1989 |
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(84) |
Designated Contracting States: |
|
DE ES FR GB IT NL |
(30) |
Priority: |
15.07.1988 CA 572208
|
(71) |
Applicant: Roberts, E. Dawson |
|
Nassau, N-918 (BS) |
|
(72) |
Inventor: |
|
- Lipsit, Marsun
Mississauga
Ontario, L4W 4H4 (CA)
|
(74) |
Representative: Brown, David Alan et al |
|
Mathys & Squire
100 Grays Inn Road London WC1X 8AL London WC1X 8AL (GB) |
|
|
|
(54) |
Recovery of heat from flue gases |
(57) Heat exchange apparatus comprising at least two adjacent rows of tubes (an inner
and an outer row) or at least two spaced rings of helical coils (30) (an inner ring
and an outer ring) for the transfer of heat thereinto from gases passing through the
heat exchange apparatus wherein the tubes of the inner row are, or the inner ring
of coils (30B) is staggered with respect to the tubes of the outer row or coils of
the outer ring (30A) and the inner row or ring (30B) is spaced from the outer (30A)
by such amount to block the flow of gases and prevent streaming of the gases to maximize
turbulence of the gases passing thereby, thereby enhancing heat transfer from the
gases to the tubes or coils (30). In another embodiment the spacing between the adjacent
tubes of the outer row and adjacent coils (30) of the outer ring (30A) was a distance
equal to the distance calculated by multiplying a factor of .500/.875 or about .571
(.5714) by the outside diameter (D) of the coil (30) or tube of the adjacent inner
coil (30b) or tube and which adjacent coils (30) or tubes of the inner row or coil
(30B) is centrally placed in the space between tubes or coils (30) of the outer row
or ring (30A) of helical coils (30) wherein the spacing of the inner row of tubes
or inner ring (30B) is spaced from the outer row or outer ring (30A) by a distance
calculated by multiplying a factor of about 1.250/.875 or 1.429 (1.4286) by the outer
diameter (D) of the inner row of coils (30B) or the inner ring respectively.