CN101648876B - Driving inlet method of aniline liquid phase hydrogenation reactor - Google Patents
Driving inlet method of aniline liquid phase hydrogenation reactor Download PDFInfo
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- CN101648876B CN101648876B CN 200910075448 CN200910075448A CN101648876B CN 101648876 B CN101648876 B CN 101648876B CN 200910075448 CN200910075448 CN 200910075448 CN 200910075448 A CN200910075448 A CN 200910075448A CN 101648876 B CN101648876 B CN 101648876B
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Abstract
The invention relates to a driving inlet method of an aniline liquid phase hydrogenation reactor. An inlet reactor hydrogen main pipeline is connected at the bottom of the aniline liquid phase hydrogenation reactor, and a trip valve is arranged on the inlet reactor hydrogen main pipeline. The driving inlet method of the aniline liquid phase hydrogenation reactor is characterized in that the trip valve of the inlet reactor hydrogen main pipeline is provided with a pipeline, and a bypass valve is arranged on the bypass pipeline; the bypass valve arranged on the bypass pipeline is started firstly at the time of driving, when pressure at both sides of the trip valve is balanced, the trip valve is then started, and the bypass valve arranged on the bypass pipeline is closed after meeting the driving requirement of the reactor system. The inlet method can prevent the damage of the hydrogenation reactor on internal parts in the process of driving hydrogen introduction, prolong the service life of the reactor and reduce the repair frequency of the reactor.
Description
Technical field
The present invention relates to the Aniline Unit liquid phase hydrogenation reactor, particularly relate to a kind of air inlet method of Aniline Unit liquid phase hydrogenation reactor start-up.
Background technology
The process of aniline liquid phase hydrogenation reactor start-up is comparatively complicated, and key is to need first to introduce hydrogen before feeding intake, and drives to require until reactor assembly hydrogen content and reactor pressure satisfy.Its technical process such as Fig. 1 connect into reactor hydrogen Trunk Line in the bottom of aniline liquid phase hydrogenation reactor 1, advance a trip valve 2 is installed on reactor hydrogen Trunk Line.The system pressure that the aniline liquid phase hydrogenation reactor drives to require is 1.7MPa (absolute pressure), and before the driving bleed, the pressure in reactor is normal pressure, and the pressure in the hydrogen pipe network is 1.9MPa (absolute pressure).During bleed, open moment at the trip valve that advances on reactor hydrogen Trunk Line, the hydrogen that gathers is easy to allow air-flow carry reactor bottom material impact reactor tower tray internals, make reactor internals major injury, particularly tower tray serious distortion crimp, thereby have to reactor is carried out parking maintenance, serious financial loss both caused, also greatly affected the work-ing life of reactor, returned safety in production and brought very large hidden danger.
Summary of the invention
The purpose of this invention is to provide a kind of driving inlet method of aniline liquid phase hydrogenation reactor, with the damage that prevents that existing aniline liquid phase hydrogenation reactor from causing the reactor internals in driving to draw the process of hydrogen.
The technical solution adopted for the present invention to solve the technical problems is: the bottom of aniline liquid phase hydrogenation reactor is connected with into reactor hydrogen Trunk Line, advances a trip valve is installed on reactor hydrogen Trunk Line.At the trip valve place of advancing reactor hydrogen Trunk Line, a by-pass line is set, and bypass valve is installed on by-pass line.
When the aniline liquid phase hydrogenation reactor is driven, hydrogen by pre-treatment after, original pipeline trend is first to pass through trip valve, then directly enters in reactor by sparger.And the present invention first opened the bypass valve of installing on by-pass line before opening the hydrogen trip valve, make hydrogen first by newly-increased by-pass line, enter in reactor by sparger again, after the pressure equalization on trip valve both sides, open again trip valve, hydrogen passes through trip valve, enter reactor by sparger again, then progressively strengthen and introduce amounts of hydrogen, until satisfy reactor assembly driving requirement, be till reacting system pressure reaches 1.7MPa (absolute pressure), to close at last the bypass valve on by-pass line.
The present invention can also increase on the both sides of trip valve trip valve upstream and downstream pressure reduction indicator signal, and with hydrogen pressure signal and reactor bottom pressure signal access pressure reduction indicator signal, controls trip valve upstream and downstream pressure reduction after below 50KPa, then opens trip valve.
After driving inlet method of aniline liquid phase hydrogenation reactor of the present invention being applied on the aniline liquid phase hydrogenation reactor of Aniline Unit, through the bleed of repeatedly driving, the situation that the device internals that do not react are again damaged, alleviated the infringement that in driving bleed process, gas shock causes to the reactor internals, extended the work-ing life of reactor, reduced the maintenance frequency of reactor, solved simply and easily and drawn in the hydrogen process easily to hurtful this technical problem of reactor internals.Simultaneously, also to make the driving of aniline liquid phase hydrogenation reactor draw the hydrogen process operation easier for the inventive method.
Description of drawings
Fig. 1 is the process flow sheet of existing driving inlet method of aniline liquid phase hydrogenation reactor;
Fig. 2 is the process flow sheet of driving inlet method of aniline liquid phase hydrogenation reactor of the present invention.
Embodiment
As shown in Figure 2, newly increase a by-pass line 3 (2 ") at the upper trip valve of hydrogen Trunk Line (10 ") 2 places, bypass valve 4 is installed on by-pass line 3, and in the pressure reduction indicator signal PDI that in master control room DCS, original hydrogen pressure signal PT and PT access newly increases, allow the pressure reduction of trip valve 2 both sides that indication is arranged in DCS, warning (30KPa) and interlocking (50KPa) parameter are set simultaneously.
when the aniline liquid phase hydrogenation reactor is driven, first open the bypass valve 4 of installing on by-pass line 3, hydrogen by pre-treatment after, first by newly-increased by-pass line 3, enter in reactor 1 by sparger again, the pressure reduction that shows trip valve 2 upstream and downstream as pressure reduction indicator signal PDI is after below 50KPa, open again trip valve 2, hydrogen is by trip valve 2, enter reactor 1 by sparger again, then progressively strengthen and introduce amounts of hydrogen, until satisfy reactor assembly driving requirement, be till reacting system pressure reaches 1.7MPa (absolute pressure), close at last the bypass valve 4 on by-pass line 3.
All coordinate red-tape operati hydrogen according to pressure reduction indicator signal PDI in whole intake process, in case bleed is too fast, in the time of may impacting the reactor internals, DCS reports to the police even to interlock and moves, the impact of avoiding the bleed process that reactor is caused.
Claims (2)
1. driving inlet method of aniline liquid phase hydrogenation reactor, to be connected with into reactor hydrogen Trunk Line in the bottom of aniline liquid phase hydrogenation reactor (1), advance a trip valve (2) is installed on reactor hydrogen Trunk Line, it is characterized in that locating to arrange a by-pass line (3) at the trip valve that advances reactor hydrogen Trunk Line (2), and bypass valve (4) is installed on by-pass line (3), first open the upper bypass valve (4) of installing of by-pass line (3) during driving, after the pressure equalization on trip valve (2) both sides, open again trip valve (2), satisfy the bypass valve (4) of closing after reactor assembly drives to require on by-pass line (3).
2. driving inlet method of aniline liquid phase hydrogenation reactor according to claim 1, it is characterized in that increasing on the both sides of trip valve (2) trip valve upstream and downstream pressure reduction indicator signal, and with hydrogen pressure signal and reactor bottom pressure signal access pressure reduction indicator signal, control trip valve upstream and downstream pressure reduction after below 50KPa, then open trip valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910075448 CN101648876B (en) | 2009-09-15 | 2009-09-15 | Driving inlet method of aniline liquid phase hydrogenation reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910075448 CN101648876B (en) | 2009-09-15 | 2009-09-15 | Driving inlet method of aniline liquid phase hydrogenation reactor |
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| Publication Number | Publication Date |
|---|---|
| CN101648876A CN101648876A (en) | 2010-02-17 |
| CN101648876B true CN101648876B (en) | 2013-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200910075448 Active CN101648876B (en) | 2009-09-15 | 2009-09-15 | Driving inlet method of aniline liquid phase hydrogenation reactor |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102371138B (en) * | 2010-08-12 | 2014-12-17 | 五冶集团上海有限公司 | Water test running method for benzene hydrogenation device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200977456Y (en) * | 2006-10-24 | 2007-11-21 | 中国石油天然气股份有限公司 | Automatic control device for gas phase emptying of bubble point reactor |
| CN201295607Y (en) * | 2008-11-19 | 2009-08-26 | 山东福田药业有限公司 | Device capable of reducing sugar liquid hydrogenation feed pressure and recycling hydrogen gas |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1216853C (en) * | 2003-10-10 | 2005-08-31 | 清华大学 | Apparatus and method for preparing aminobenzene by nitrobenzene gas-phase hydrogenation |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200977456Y (en) * | 2006-10-24 | 2007-11-21 | 中国石油天然气股份有限公司 | Automatic control device for gas phase emptying of bubble point reactor |
| CN201295607Y (en) * | 2008-11-19 | 2009-08-26 | 山东福田药业有限公司 | Device capable of reducing sugar liquid hydrogenation feed pressure and recycling hydrogen gas |
Non-Patent Citations (2)
| Title |
|---|
| 减温减压装置增设旁路管的探讨;王清良;《节能》;19911231(第5期);第14-15页 * |
| 王清良.减温减压装置增设旁路管的探讨.《节能》.1991,(第5期),第14-15页. |
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| CN101648876A (en) | 2010-02-17 |
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