Ushirikiano
SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
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.
Juu
Unknown
Maagizo
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.
Zana zinazohitajika:
Vipimo visivyojulikana2
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).
Vifaa kwa hatua hii:
Chuma cha umbo la U1 supports
Bolti ya kichwa cha pembe sita - daraja 8.81 kipandeZana zinazohitajika:
Koleo la mabomba3
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.
Vifaa kwa hatua hii:
Bomba la chuma (ukuta mnene, ncha zenye nyuzi)1 2 in and 3 in runs
Kiungio cha bomba chenye nyuzi1 return bends, unions, stuffing boxes
Kizibio kisichojulikana1 stuffing boxesZana zinazohitajika:
Koleo la mabomba4
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.
Vifaa kwa hatua hii:
Bomba la chuma (ukuta mnene, ncha zenye nyuzi)1 headers
Vali ya mlango2 vipandeZana zinazohitajika:
Koleo la mabombaVifaa
6- 1 supportsKishikilia Nafasi
- Kishikilia Nafasi
- Kishikilia Nafasi
- 1 return bends, unions, stuffing boxesKishikilia Nafasi
- 1 stuffing boxesKishikilia Nafasi
- 2 vipandeKishikilia Nafasi
Zana Zinazohitajika
2- Kishikilia Nafasi
- Kishikilia Nafasi
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