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pot heat exchanger

A technology for heat exchangers and gas purification, applied in heat exchange equipment, heat exchangers, indirect heat exchangers, etc., to achieve low total system energy loss, uniform or balanced raw gas velocity, and reduce fouling

Active Publication Date: 2017-09-22
GENERAL ELECTRIC TECH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This occurs because raw gas collection piping and gas cleaning units can introduce flow resistance in the flue gas collection and cleaning system

Method used

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Examples

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Embodiment Construction

[0026] figure 1 is a schematic diagram of the aluminum manufacturing plant 10 viewed from above. Aluminum fabrication plant 10 includes a plurality of pot rooms or potrooms 12AB, 12CD, each pot room including a plurality of aluminum preparation melting pots or pots 14 . The electrolysis cells 14 are arranged in a series of electrolysis cells in a manner well known to those skilled in the art. The series of electrolysers comprises a plurality of electrolysers connected in series in a direct current (DC) loop. figure 1 A first electrolysis cell bay 12AB and a second electrolysis cell bay 12CD are shown, each housing a respective series of electrolysis cells 16AB, 16CD. although figure 1 The single series of pots 16AB, 16CD in are shown housed in a single pot room 12AB, 12CD, but a single series of pots defined as a plurality of melting pots electrically connected in series could also simply extend across several pot rooms 12 . For example, as an alternative to the configura...

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Abstract

A raw gas collection system for collecting raw gas from a plurality of aluminum smelting pots is provided with a plurality of branch pipes (28d), each of the plurality of branch pipes (28d) being arranged to divert a respective branch stream of the raw gas ( 38d ) leads from the aluminum melting pot to the collection pipe ( 26A), which is common and shared by branch pipes ( 28d ). Each of said branch pipes (28d) is equipped near its outlet (52d) with a curved section (50d) for connecting the branch stream (38d) with the raw gas already present in the common collection pipe (26A) ( 27A); and a constriction (54d) for accelerating the branch flow (38d) into the common collection pipe (26A) through the branch pipe outlet (52d). Furthermore, each of said branch pipes ( 28d ) is equipped with a heat exchanger ( 40d ) for removing heat from the corresponding branch stream ( 38d ) of raw gas. The combined flow resistance of the constriction (54d) and heat exchanger (40d) reduces the need to use baffles to adjust the corresponding side stream (28d), thereby reducing the power required to deliver the raw gas.

Description

technical field [0001] The present invention relates to a raw gas collection system for collecting raw gas from a plurality of aluminum smelting pots. The invention also relates to a method of moving a side stream of raw gas from an aluminum smelting pot to a common collection pipe. Background technique [0002] Aluminum is typically produced by electrolysis using one or more aluminum production cells. Such electrolytic cells typically include a bath for containing bath contents containing fluoride-containing minerals on top of molten aluminium. The bath contents are in contact with the cathode block and the anode block. Aluminum oxide was supplied to the bath at regular intervals via openings at several locations along the center of the tank and between the rows of anodes. [0003] The electrolysis reaction that occurs in the electrolysis cell generates hot exhaust gases that include gaseous components that are undesirable in the atmosphere, including hydrogen fluoride, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C3/22F17D1/04F27D1/00
CPCF27B14/08F27D17/001F27D17/004F28D7/1615F28D7/1653F28D21/0003F28F9/0282F28F13/08F28F19/00C25C3/22Y10T137/6416C25C7/06C25C3/06C25C3/24F27D17/002Y02P10/25
Inventor A.K.索尔胡斯G.维德O.E.比亚尔诺
Owner GENERAL ELECTRIC TECH GMBH
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