JPS5740422A - Control of distillation column for distilling lng equipped with condenser at its upper part - Google Patents
Control of distillation column for distilling lng equipped with condenser at its upper partInfo
- Publication number
- JPS5740422A JPS5740422A JP11469980A JP11469980A JPS5740422A JP S5740422 A JPS5740422 A JP S5740422A JP 11469980 A JP11469980 A JP 11469980A JP 11469980 A JP11469980 A JP 11469980A JP S5740422 A JPS5740422 A JP S5740422A
- Authority
- JP
- Japan
- Prior art keywords
- lng
- reflux
- reflux ratio
- condenser
- flow rate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: In the titled distillation column wherein flow rate of reflux can not be measured because the distillation is equipped with a condenser at its top, to obtain high-quality ethane, by estimating and calculating a reflux ratio of flow rate of reflux/flow rate of distillation through indirect measurement to give information, controlling the reflux ratio based on the information.
CONSTITUTION: In a distillation column for distilling LNG equipped with a condenser at its upper part, (i) the amount of condensation of LNG (L+D) is obtained from the amount of vaporization of a refrigerant in the condenser (F1-F2), (ii) the flow rate of reflux (L) or the reflux ratio (L/D) is obtained from the amount of condensation of (L+D) and the flow the rate of product (D), and (iii) the reflux ratio is controlled constant by operating the heat source (Q) for vaporizing the LNG using the information of the flow rate of reflux (L) or the reflux ratio (L/D). Control of reflux ratio is made possible even if heat transfer efficiency changes (freezing) in the piping of LNG in a warm water tank by this method in the above-mentioned distillation column wherein the reflux ratio can not be measured directly, and high-quality ethane can be recovered from LNG.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11469980A JPS5740422A (en) | 1980-08-22 | 1980-08-22 | Control of distillation column for distilling lng equipped with condenser at its upper part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11469980A JPS5740422A (en) | 1980-08-22 | 1980-08-22 | Control of distillation column for distilling lng equipped with condenser at its upper part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5740422A true JPS5740422A (en) | 1982-03-06 |
Family
ID=14644405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11469980A Pending JPS5740422A (en) | 1980-08-22 | 1980-08-22 | Control of distillation column for distilling lng equipped with condenser at its upper part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5740422A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5860563B1 (en) * | 2015-07-31 | 2016-02-16 | 株式会社Ｉｂコンサルタント | Complex liquid separation and purification equipment |
-
1980
- 1980-08-22 JP JP11469980A patent/JPS5740422A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5860563B1 (en) * | 2015-07-31 | 2016-02-16 | 株式会社Ｉｂコンサルタント | Complex liquid separation and purification equipment |
| JP2017029910A (en) * | 2015-07-31 | 2017-02-09 | 株式会社Ｉｂコンサルタント | Separation refining apparatus for composite liquid |
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