Title:
ATMOSPHERIC-VACUUM HEAT EXCHANGE SYSTEM HAVING COIL-WOUND HEAT EXCHANGERS, AND HEAT EXCHANGE PROCESS
Document Type and Number:
WIPO Patent Application WO/2021/017514
Kind Code:
A1
Abstract:
An atmospheric-vacuum heat exchange system having coil-wound heat exchangers, comprising: first and second heat exchanger groups; a preliminary distillation column (4) or a flash column; an atmospheric pressure furnace (5), an atmospheric pressure column (6), a reduced pressure furnace (7), and a reduced pressure column (8). The heat exchangers in the first and/or second heat exchanger group are coil-wound heat exchangers. Each coil-wound heat exchanger comprises: a shell-side cylinder (370); a first shell-side connection tube (371) and a second shell-side connection tube (372); a first tube sheet (330) and a second tube sheet (340); first tube cases (310) and second tube cases (320); and heat exchange tubes (360). The heat exchange tubes (360) are spirally wound, from inside to outside along the axial direction of the shell-side cylinder (370), to form a plurality of layers of spiral tubes, a same layer of spiral tubes being formed by winding a plurality of heat exchange tubes. There are N first tube cases (310) and N second tube cases (320) respectively. The first tube cases (310) are independently distributed on the first tube sheet (330). The second tube cases (320) are independently distributed on the second tube sheet (340). The heat exchange tubes (360) in a same layer of spiral tubes are divided into N groups. The two end portions of each group of heat exchange tubes (360) are respectively distributed in respective corresponding first tube cases (310) and second tube cases (320), wherein N is a natural number greater than or equal to 1. The system can reduce heat loss and can quickly deal with a heat exchange apparatus in which a fault occurs.
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Inventors:
WANG JIANLIANG (CN)
ZHANG XIANAN (CN)
MA HUILI (CN)
HU XINGMIAO (CN)
REN HONGLIANG (CN)
WANG YU (CN)
TAO JIANG (CN)
CUI JIAOYUE (CN)
ZHANG XIANAN (CN)
MA HUILI (CN)
HU XINGMIAO (CN)
REN HONGLIANG (CN)
WANG YU (CN)
TAO JIANG (CN)
CUI JIAOYUE (CN)
Application Number:
PCT/CN2020/082663
Publication Date:
February 04, 2021
Filing Date:
April 01, 2020
Export Citation:
Assignee:
ZHENHAI PETROCHEMICAL JIANAN ENG CO LTD (CN)
International Classes:
C10G53/00; F28D7/00
Foreign References:
| CN110373222A | 2019-10-25 | |||
| CN104479735A | 2015-04-01 | |||
| CN204455010U | 2015-07-08 | |||
| CN102746883A | 2012-10-24 | |||
| CN208471993U | 2019-02-05 | |||
| US20140374322A1 | 2014-12-25 | |||
| US20090090613A1 | 2009-04-09 |
Attorney, Agent or Firm:
NINGBO CHANNEL PATENT ATTORNEYS OFFICE (CN)
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