Multistage bath condenser-reboiler

Patent metadata

Field	Value
Publication number	US-10408535-B2
Application number	US-201515502250-A
Country	US
Kind code	B2
Filing date	Aug 21, 2015
Priority date	Aug 22, 2014
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A multistage bath condenser-reboiler according to the present invention includes:
a heat exchanger core composed of (i) a heat exchange section formed by adjacently stacking condensation passages and evaporation passages, and (ii) a liquid communication section formed from liquid communication passages provided on at least one side surface in the stacking height direction of the heat exchange section; and one or more stages of liquid reservoir sections formed on at least one side surface in the width direction of the heat exchanger core.

First claim

The invention claimed is:

1. A multistage bath condenser-reboiler, comprising:
condensation passages which communicate in a vertical direction and through which a gas flows and condenses, evaporation passages which are partitioned into multiple stages through which a liquid flows that undergoes heat exchange with the gas and evaporates, one or more stages of liquid reservoir sections which hold liquid supplied to and discharged from the evaporation passages, and liquid communication passages through which the liquid in the liquid reservoir sections flows from upper liquid reservoir sections to lower liquid reservoir sections, wherein
the multistage bath condenser-reboiler comprises:
a heat exchanger core comprising (i) a heat exchange section formed by adjacently stacking the condensation passages and the evaporation passages formed from plates and fins, and (ii) a liquid communication section formed from the liquid communication passages provided on at least one side surface in a stacking height direction of the heat exchange section, and
one or more stages of the liquid reservoir section formed on at least one side surface in a width direction of the heat exchanger core so as to correspond with a number of stages of the evaporation passages.

2. The multistage bath condenser-reboiler according to claim 1 , wherein in the evaporation passages are formed evaporation inlet flow channels through which the liquid in the liquid reservoir sections is introduced into the partitioned evaporation passages, and evaporation outlet flow channels which discharge a rising vapor-liquid two-phase fluid into the liquid reservoir sections, and in the liquid communication passages are formed communicating inlet flow channels which introduce the liquid in the liquid reservoir sections into the liquid communication passages, and communicating outlet flow channels from which liquid flows out into a lower liquid reservoir section.

3. The multistage bath condenser-reboiler according to claim 2 , wherein an inlet of the communicating inlet flow channel is provided at a position below a position of an outlet of the evaporation outlet flow channel.

4. The multistage bath condenser-reboiler according to claim 2 , wherein a height position of an inlet of the evaporation inlet flow channel is offset with respect to a height position of an outlet of the communicating outlet flow channel.

5. The multistage bath condenser-reboiler according to claim 1 , wherein each liquid reservoir section is an enclosed space, and in each liquid reservoir section is provided an evaporation gas extraction port through which evaporated gas that flows out to the liquid reservoir section is extracted.

6. The multistage bath condenser-reboiler according to claim 5 , wherein, in the liquid reservoir section, in an uppermost liquid reservoir section is provided a liquid inlet port into which liquid is introduced from externally, and in a lowermost liquid reservoir section is provided a liquid discharge port from which liquid is discharged externally.

7. The multistage bath condenser-reboiler according to claim 1 , wherein the liquid reservoir sections are open, and the evaporator further comprises a gas collection vessel which collects evaporated gas that flows out into the liquid reservoir sections.

8. The multistage bath condenser-reboiler according to claim 1 , wherein the liquid reservoir sections are provided on both sides in a width direction of the heat exchanger core.

9. The multistage bath condenser-reboiler according to claim 1 , wherein the liquid communication passages are provided on both side surfaces in a stacking height direction of the heat exchanger core.

Assignees

• Taiyo Nippon Sanso Corp

Inventors

• Egoshi Nobuaki

Classifications

• F25J3/04884

  Arrangement of reboiler-condensers · CPC title

• F25J5/005

  in a reboiler-condenser, e.g. within a column · CPC title

• F25J3/04412 Primary

  in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column · CPC title

• F25J2250/10

  Boiler-condenser with superposed stages · CPC title

• F25J2250/02

  Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger · CPC title