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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.
Abantado
Unknown
Mga Tagubilin
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.
Mga kailangang kasangkapan:
Hindi alam na sukat2
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).
Mga materyales para sa hakbang na ito:
Seksiyong asero na hugis U1 supports
Turnilyong anim-anggulo - uri 8.81 pirasoMga kailangang kasangkapan:
Liyabe sa tubo3
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.
Mga materyales para sa hakbang na ito:
Tubong bakal (makapal ang dingding, may sinulid na dulo)1 2 in and 3 in runs
Kasukasuan ng tubong may sinulid1 return bends, unions, stuffing boxes
Hindi alam na packing1 stuffing boxesMga kailangang kasangkapan:
Liyabe sa tubo4
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.
Mga materyales para sa hakbang na ito:
Tubong bakal (makapal ang dingding, may sinulid na dulo)1 headers
Balbulang pinto2 pirasoMga kailangang kasangkapan:
Liyabe sa tuboMga Materyales
6- 1 supportsPlaceholder
- Placeholder
- Placeholder
- 1 return bends, unions, stuffing boxesPlaceholder
- 1 stuffing boxesPlaceholder
- 2 pirasoPlaceholder
Mga Kinakailangang Kasangkapan
2- Placeholder
- Placeholder
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