CN207708543U - Deethanization system - Google Patents
Deethanization system Download PDFInfo
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- CN207708543U CN207708543U CN201721766534.0U CN201721766534U CN207708543U CN 207708543 U CN207708543 U CN 207708543U CN 201721766534 U CN201721766534 U CN 201721766534U CN 207708543 U CN207708543 U CN 207708543U
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Abstract
The utility model discloses a kind of deethanization systems, it includes dethanizer, thermosiphon reboiler and LPG cyoinders, the tower bottom liquid outlet of dethanizer is connect with the entrance of the tower bottom liquid entrance of thermosiphon reboiler and LPG cyoinders respectively, and the gas-liquid mixed of thermosiphon reboiler is mutually exported to be connect with the gas-liquid mixed phase entrance of dethanizer.The utility model has the advantage of：The cooperation of liquid level gauge and thermosiphon reboiler realizes the vaporizing of tower bottom liquid, unpowered cycle, and pump need not be arranged between dethanizer and thermosiphon reboiler, reduce energy consumption, avoid liquefied petroleum gas leakage accident caused by pump breaks down；Dethanizer to the pipeline between LPG cyoinders is equipped with reflux branch, can carry out secondary deethanization to the unqualified liquefied petroleum gas of dethanizer discharge, ensure that the quality of liquefied petroleum gas in LPG cyoinders.
Description
Technical field：
The utility model is related to Fischer-Tropsch process exhaust process fields, and in particular to a kind of deethanization system.
Background technology：
Contain a large amount of lower carbon number hydrocarbons, requirements of the national standard liquefaction stone from the liquefied petroleum gas recycled in Fischer-Tropsch process exhaust
C in oil gas3Hydro carbons and C4Hydrocarbon component percentage is not less than 95%, to obtain the liquefied petroleum gas of standard, needs to F- T synthesis
Tail gas carries out low temperature oil wash, reduces and removes C from the liquefied petroleum gas that Fischer-Tropsch process exhaust recycles3、C4Other components other than hydro carbons
Content.Low temperature oil wash technique includes the following steps：Fischer-Tropsch process exhaust, rich absorbent etc. is isolated in gs-oil separator
Oil phase and gas phase；Gas phase enters absorption tower through cooling, and is absorbed with absorbent counter current contacting in absorption tower, on absorption tower
Bottom of tower generates rich absorbent；Oil phase enters in debutanizing tower, and C is carried out in debutanizing tower4Hydro carbons and C5And C5The above hydrocarbon component
Separation, debutanizing tower tower top generate thick liquefied petroleum gas enter in dethanizer, remove C2Hydro carbons obtains the liquid of standard
Liquefied oil gas.
It is had the following problems during low-temperature oil is washed：1, dethanizer tower bottom liquid is entered by pumping pressure-raising in the prior art
Reboiler, the electricity consumption of pump is big, high energy consumption, and pump machine envelope during long-term operation is easily damaged, and it is more to pump active interface,
Active interface, which is easy to collapse out, will occur gas leak accident, and there are security risks；2, when dethanizer breaks down, thick liquid
C in liquefied oil gas2Hydro carbons can not remove, and lead to C in liquefied petroleum gas2Hydrocarbon content is exceeded.
Utility model content：
It is de- that the purpose of this utility model is to provide a kind of liquefied petroleum gas recovering effects is good, safe, low energy consumption
Ethane system.
The utility model is implemented by following technical solution：Deethanization system comprising dethanizer, thermosiphon reboiler
And LPG cyoinders, the dethanizer upper portion side wall are equipped with thick liquefied petroleum gas entrance, the thick liquefied petroleum gas enters
Mouth is equipped with thick liquefied petroleum gas valve, and gaseous phase outlet is equipped at the top of the dethanizer, and the Deethanizer bottom is equipped with bottom of tower
Liquid exports, and the tower bottom liquid outlet is connect with the entrance of the LPG cyoinders by pipeline；The tower bottom liquid is exported to institute
The pipeline stated between LPG cyoinders is equipped with bottom of tower fluid valve, and the tower bottom liquid is exported between the bottom of tower fluid valve
Pipeline is connect by reboiling branch with the tower bottom liquid entrance of the thermosiphon reboiler, the gas-liquid of the thermosiphon reboiler
Mixed phase outlet is connect with the gas-liquid mixed phase entrance of the dethanizer, and the thermosiphon reboiler is located at the tower bottom liquid
Outlet lower section；
The inner wall lower of the dethanizer is equipped with liquid level gauge, the signal output end of the liquid level gauge respectively with the bottom of tower
Fluid valve is connected with the signal input part signal of the thick liquefied petroleum gas valve；
The arrival end of the reboiling branch to the pipeline between the bottom of tower fluid valve passes through branch and the thick liquid of flowing back
Liquefied oil gas valve to the pipeline connection between the thick liquefied petroleum gas entrance, the reflux branch road is equipped with reflux pump, institute
The reflux branch road for stating reflux pump discharge side is equipped with return valve；
It further includes oil liquefied gas analyzer and controller, and the probe of the oil liquefied gas analyzer is placed in described heavy
It boils in the arrival end to the pipeline between the arrival end of the reflux branch of branch, the signal of the oil liquefied gas analyzer is defeated
Outlet is connect with the signal input part of the controller, the signal output end of the controller respectively with the bottom of tower fluid valve,
The return valve is connected with the reflux pump signal.
Further, further include timer, the arrival end of the reflux branch is to the pipe between the bottom of tower fluid valve
Road is equipped with emptying branch, and the emptying branch road is equipped with emptying valve, and the controller is connect with the timer-signals.
The advantages of the utility model：1, liquid level gauge and thermosiphon reboiler cooperation realize the vaporization of tower bottom liquid, without dynamic
Power recycles, and pump need not be arranged between dethanizer and thermosiphon reboiler, reduce energy consumption, avoids pump and breaks down and makes
At liquefied petroleum gas leakage accident, it is safe；2, the tower bottom liquid of dethanizer is exported to the pipe between LPG cyoinders
Road is equipped with reflux branch, and secondary deethanization can be carried out to the unqualified liquefied petroleum gas of dethanizer discharge；3, reflux branch
The arrival end on road to the pipeline between LPG cyoinders is equipped with emptying branch, flows back when to unqualified liquefied petroleum gas
The time for repeating deethanization reaches one hour, when liquefied petroleum gas is still unqualified, closing volume valve, stops reflux, and unlatching is put
Empty valve is vented underproof liquefied petroleum gas, drains into flare system, ensure that the normal operation and liquefaction stone of system
The quality of liquefied petroleum gas in oil gas tank.
Description of the drawings：
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other drawings may also be obtained based on these drawings.
Fig. 1 is the connection diagram of the utility model；
Fig. 2 is the liquid level gauge control system connection diagram of the utility model；
Fig. 3 is the controller control system connection diagram of the utility model.
Dethanizer 1, thermosiphon reboiler 2, LPG cyoinders 3, thick liquefied petroleum gas entrance 4, thick liquefied petroleum
Air valve 5, gaseous phase outlet 6, tower bottom liquid outlet 7, bottom of tower fluid valve 8, reboiling branch 9, liquid level gauge 10, flow back branch 11, reflux
Pump 12, return valve 13, oil liquefied gas analyzer 14, controller 15 are vented branch 16, are vented valve 17, timer 18.
Specific implementation mode：
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment 1：
As shown in Figs. 1-3, deethanization system comprising dethanizer 1, thermosiphon reboiler 2 and LPG cyoinders
3,1 upper portion side wall of dethanizer is equipped with thick liquefied petroleum gas entrance 4, and thick liquefied petroleum gas entrance 4 is equipped with thick liquefied petroleum gas
Valve 5,1 top of dethanizer are equipped with gaseous phase outlet 6, and 1 bottom of dethanizer is equipped with tower bottom liquid and exports 7, and tower bottom liquid exports 7 and liquid
The entrance of liquefied oil gas tank 3 is connected by pipeline；Tower bottom liquid outlet 7 to the pipeline between LPG cyoinders 3 is equipped with bottom of tower
Fluid valve 8, tower bottom liquid outlet 7 to the pipeline between bottom of tower fluid valve 8 pass through the tower of reboiling branch 9 and thermosiphon reboiler 2
Bottom liquid entrance connection, the gas-liquid mixed of thermosiphon reboiler 2 is mutually exported to be connect with the gas-liquid mixed phase entrance of dethanizer 1,
Thermosiphon reboiler 2 is located at 7 lower section of tower bottom liquid outlet；
The inner wall lower of dethanizer 1 is equipped with liquid level gauge 10, the signal output end of liquid level gauge 10 respectively with bottom of tower fluid valve 8
It is connected with the signal input part signal of thick liquefied petroleum gas valve 5；
The arrival end of reboiling branch 9 to the pipeline between bottom of tower fluid valve 8 passes through branch 11 and the thick liquefied petroleum gas of flowing back
Valve 5 to the pipeline connection between thick liquefied petroleum gas entrance 4, reflux branch 11 is equipped with reflux pump 12, and reflux pump 12 exports
The reflux branch 11 of side is equipped with return valve 13；
It further includes oil liquefied gas analyzer 14 and controller 15, and the probe of oil liquefied gas analyzer 14 is placed in reboiling
In the arrival end of branch 9 to the pipeline between the arrival end of reflux branch 11, the signal output end of oil liquefied gas analyzer 14
Connect with the signal input part of controller 15, the signal output end of controller 15 respectively with bottom of tower fluid valve 8, return valve 13 and
12 signal of reflux pump connects.
It further includes timer 18, and arrival end to the pipeline between bottom of tower fluid valve 8 for the branch 11 that flows back is equipped with emptying
Branch 16, emptying branch 16 are equipped with emptying valve 17, and controller 15 is connect with 18 signal of timer.
Operation principle：
Thick liquefied petroleum gas enters dethanizer 1 by thick liquefied petroleum gas entrance 4, during the decline under tower
The gas converting heat that portion rises, C after thick liquefied petroleum gas heat absorption2Component vaporization is separated from thick liquefied petroleum gas, and from de-
The gaseous phase outlet 6 at 1 top of ethane tower is discharged, into following process device；Bottom of tower is fallen under thick liquefied petroleum gas after deethanization,
From 7 discharge of the tower bottom liquid of 1 bottom of dethanizer outlet.
A tower bottom liquid part enters thermosiphon reboiler 2 and carries out heating vaporization, and the tower bottom liquid after vaporization is mixed by gas-liquid
It closes phase entrance and enters dethanizer 1, gas phase rises from 1 lower part of dethanizer and inversely changed with the thick liquefied petroleum gas of whereabouts
Heat achievees the purpose that deethanization；1 bottom of dethanizer is fallen under liquid phase, is mixed with the thick liquefied petroleum gas after deethanization；Bottom of tower
Another part of liquid is discharged from 1 bottom of tower of dethanizer, and is delivered in LPG cyoinders 3 and stores.
Liquid level gauge 10 measures the liquid level of 1 tower bottom liquid of dethanizer, when liquid level is higher than gas-liquid mixed phase entrance
When, cause the gas phase that thermosiphon reboiler 2 is delivered in the vaporization tower bottom liquid of dethanizer 1 to enter and be obstructed, influences deethanization
The progress of 1 inside reverse heat-exchange of tower, liquid level gauge 10 send out shutdown signal, thick liquefied petroleum gas (LPG) valve to thick liquefied petroleum gas valve 5
Door 5 is closed, and 1 inside of dethanizer only carries out tower bottom liquid discharge and gas-phase product discharge, and the liquid level of tower bottom liquid declines；Work as tower
When the liquid level of bottom liquid is less than gas-liquid mixed phase entrance, is higher than setting value, liquid level gauge 10 is sent out to thick liquefied petroleum gas valve 5
Open signal, thick liquefied petroleum gas enter inside dethanizer 1, and dethanizer 1 carries out the deethanization processing of thick liquefied petroleum gas；
When 1 inside liquid level of dethanizer is less than setting value, heat siphon type weight very few into the tower bottom liquid in thermosiphon reboiler 2
Heat medium temperature can not fully be taken away in boiling device 2, and thermosiphon reboiler 2 damages in order to prevent, and liquid level gauge 10 is to tower at this time
Bottom fluid valve 8 sends out shutdown signal, and bottom of tower fluid valve 8 is closed, and tower bottom liquid is no longer emitted into LPG cyoinders 3, tower bottom liquid
Liquid level rises.
When tower bottom liquid is flowed to LPG cyoinders 3, oil liquefied gas analyzer 14 measures C in tower bottom liquid2Constituent content
And measured value is sent to controller 15, work as C2When constituent content is exceeded, controller 15 is to bottom of tower fluid valve 8, return valve
13, reflux pump 12 and timer 18 send out signal, and bottom of tower fluid valve 8 is closed, and return valve 13 and reflux pump 12 are opened, timer
18 start timing, and reflux pump 12 drives tower bottom liquid to be back in dethanizer 1 from thick liquefied petroleum gas entrance 4 and carries out de- second again
Alkane；When 18 timing of timer discontented one is small, C in the tower bottom liquid of 7 discharge of tower bottom liquid outlet2Constituent content complies with standard, control
Device 15 sends out shutdown signal, return valve 13, reflux pump to bottom of tower fluid valve 8, return valve 13, reflux pump 12 and timer 18
12 close, and timer 18 stops timing, and the tower bottom liquid of 7 discharge of tower bottom liquid outlet is no longer back in dethanizer 1, controller 15
Open signal is sent out to bottom of tower fluid valve 8, bottom of tower fluid valve 8 is opened, and tower bottom liquid drains into LPG cyoinders 3；When timer 18
Timing is one hour full, the C in the tower bottom liquid of 7 discharge of tower bottom liquid outlet2When constituent content has not been met the standard of liquefied petroleum gas,
Controller 15 sends signal to emptying valve 17, return valve 13 and reflux pump 12, and return valve 13 and reflux pump 12 are closed, tower
The tower bottom liquid of 7 discharge of bottom liquid outlet is no longer back in dethanizer 1, and emptying valve 17 is opened, and tower bottom liquid will be by being vented branch
Road 16 enters flare system, and non-compliant tower bottom liquid is avoided to enter LPG cyoinders 3；
Thermosiphon reboiler 2 and liquid level gauge 10 coordinate in the present embodiment, realize the vaporizing of tower bottom liquid, unpowered cycle,
Pump need not be set between dethanizer 1 and thermosiphon reboiler 2, reduce energy consumption, avoided caused by pump breaks down
Liquefied petroleum gas leakage accident.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection domain within.
Claims (2)
1. deethanization system, which is characterized in that it includes dethanizer, thermosiphon reboiler and LPG cyoinders, described
Dethanizer upper portion side wall is equipped with thick liquefied petroleum gas entrance, and the thick liquefied petroleum gas entrance is equipped with thick liquefied petroleum gas (LPG) valve
Door, the dethanizer top are equipped with gaseous phase outlet, and the Deethanizer bottom is exported equipped with tower bottom liquid, the tower bottom liquid outlet
It is connect by pipeline with the entrance of the LPG cyoinders；The tower bottom liquid is exported to the pipe between the LPG cyoinders
Road be equipped with bottom of tower fluid valve, the tower bottom liquid be exported to the pipeline between the bottom of tower fluid valve by reboiling branch with it is described
The tower bottom liquid entrance of thermosiphon reboiler connects, and the gas-liquid mixed of the thermosiphon reboiler mutually exports and the deethanization
The gas-liquid mixed phase entrance of tower connects, and the thermosiphon reboiler is located at tower bottom liquid outlet lower section；
The inner wall lower of the dethanizer is equipped with liquid level gauge, the signal output end of the liquid level gauge respectively with the tower bottom liquid valve
Door is connected with the signal input part signal of the thick liquefied petroleum gas valve；
The arrival end of the reboiling branch to the pipeline between the bottom of tower fluid valve passes through branch and the thick liquefaction stone of flowing back
Oil gas valve is to the pipeline connection between the thick liquefied petroleum gas entrance, and reflux branch road is equipped with reflux pump, described time
The reflux branch road for flowing pump discharge side is equipped with return valve；
It further includes oil liquefied gas analyzer and controller, and the probe of the oil liquefied gas analyzer is placed in the reboiling branch
In the arrival end on road to the pipeline between the arrival end of the reflux branch, the signal output end of the oil liquefied gas analyzer
Connect with the signal input part of the controller, the signal output end of the controller respectively with the bottom of tower fluid valve, described
Return valve is connected with the reflux pump signal.
2. deethanization system according to claim 1, which is characterized in that it further includes timer, the reflux branch
Arrival end to the pipeline between the bottom of tower fluid valve is equipped with emptying branch, and the emptying branch road is equipped with emptying valve, institute
Controller is stated to connect with the timer-signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721766534.0U CN207708543U (en) | 2017-12-15 | 2017-12-15 | Deethanization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721766534.0U CN207708543U (en) | 2017-12-15 | 2017-12-15 | Deethanization system |
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| Publication Number | Publication Date |
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| CN207708543U true CN207708543U (en) | 2018-08-10 |
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ID=63056201
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| CN201721766534.0U Active CN207708543U (en) | 2017-12-15 | 2017-12-15 | Deethanization system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110327641A (en) * | 2019-08-15 | 2019-10-15 | 中触媒新材料股份有限公司 | A kind of quaternary ammonium aqueous alkali continuous concentration device and method |
| CN111396746A (en) * | 2020-04-06 | 2020-07-10 | 西南石油大学 | Liquid-phase ethane pipeline valve chamber heat emptying process and device |
| CN114307583A (en) * | 2022-03-04 | 2022-04-12 | 东营威联化学有限公司 | Mixed aromatic hydrocarbon dealkylation tower top extraction alkane circulating dehydrogenation device |
-
2017
- 2017-12-15 CN CN201721766534.0U patent/CN207708543U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110327641A (en) * | 2019-08-15 | 2019-10-15 | 中触媒新材料股份有限公司 | A kind of quaternary ammonium aqueous alkali continuous concentration device and method |
| CN111396746A (en) * | 2020-04-06 | 2020-07-10 | 西南石油大学 | Liquid-phase ethane pipeline valve chamber heat emptying process and device |
| CN111396746B (en) * | 2020-04-06 | 2021-05-28 | 西南石油大学 | Liquid-phase ethane pipeline valve chamber heat emptying process and device |
| CN114307583A (en) * | 2022-03-04 | 2022-04-12 | 东营威联化学有限公司 | Mixed aromatic hydrocarbon dealkylation tower top extraction alkane circulating dehydrogenation device |
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