Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Heat Exchanger: the Double-Pipe Residual Exchanger (Bell, 1923)
A heat exchanger built from stock pipe: runs of one pipe inside another, joined by return bends. Hot residuum from the stills flows one way in the outer pipe while cold crude flows the other way in the inner one, so the crude reaches the stills already warm.
Variable: 2 in within 3 in, or 3 in within 4 in, and the number of runs (Bell's Fig. 73 has 16). Expect a transfer rate of 14 to 18 B.t.u.
Source: H. S. Bell, American Petroleum Refining (1923), pp. 156-162. Unknown: run length, packing. Picture: Fig. 73 of the book.
Hejuru
Unknown
Amabwiriza
1
1
Choose the pipe pair
Choose the pipe pair
Use 2 in pipe inside 3 in, or 3 in inside 4 in. Plan the number of runs (Fig. 73: 16 runs of 2 in in 3 in). Not given: run length.
Ibikoresho bikenewe:
Ingano zitazwi2
2
Put up the supports
Put up the supports
Stand up channel-iron supports and bolt the runs to them, stacked so the bends line up at each end (Fig. 73).
Ibikoresho by'iyi ntambwe:
Icyuma gifite ishusho ya U1 supports
Bulo ifite umutwe w'impande esheshatu - urwego 8.81 igiceIbikoresho bikenewe:
Igifashi cy'imiyoboro3
3
Assemble the runs
Assemble the runs
Slide each inner pipe into its outer pipe. At one end join the outer pipes with 3 in return bends whose stuffing boxes the 2 in pipe passes through; make the boxes extra deep, because hot oil penetrates. Join the inner pipes with 2 in return bends with unions. Use heavy fittings; steel ones on the first runs where the oil is 460 °F or hotter.
Ibikoresho by'iyi ntambwe:
Umuyoboro w'icyuma (ufite inkuta zikomeye, impera zifite amasunikiro)1 2 in and 3 in runs
Igihuza cy'umuyoboro gifite imirya1 return bends, unions, stuffing boxes
Ikizibiro kitazwi1 stuffing boxesIbikoresho bikenewe:
Igifashi cy'imiyoboro4
4
Connect the headers
Connect the headers
Run counter-current: hot residuum from the stills enters the outer pipes from a 3 in header and leaves cold to storage by another; cold oil from storage enters the inner pipes from a 2 in header and leaves hot to the stills. Valve the headers.
Ibikoresho by'iyi ntambwe:
Umuyoboro w'icyuma (ufite inkuta zikomeye, impera zifite amasunikiro)1 headers
Valve y'urugi2 ibiceIbikoresho bikenewe:
Igifashi cy'imiyoboroIbikoresho
6- 1 supportsUmwanya
- Umwanya
- 1 return bends, unions, stuffing boxesUmwanya
- 1 stuffing boxesUmwanya
- 2 ibiceUmwanya
Ibikoresho bikenewe
2- Umwanya
- Umwanya
Ibikoresho by'Ibishushanyo Bifitanye Isano
Iki gishushanyo gikora
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