CN207793187U - A kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility - Google Patents
A kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility Download PDFInfo
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- CN207793187U CN207793187U CN201820140883.XU CN201820140883U CN207793187U CN 207793187 U CN207793187 U CN 207793187U CN 201820140883 U CN201820140883 U CN 201820140883U CN 207793187 U CN207793187 U CN 207793187U
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Abstract
The utility model is related to a kind of amine liquid regenerative systems applied to Floating Liquefied Natural Gas facility,The system comprises amine absorption towers,The top exit of amine absorption tower is connect with the hot inlet of processing gas heat exchanger,The hot outlets for handling gas heat exchanger are connect with the entrance of processing gas surge tank,The outlet at bottom of the bottom liquid outlet and amine absorption tower that handle gas surge tank is connected to the cold inlet of waste heat utilization heat exchanger after converging,The cold flow outlet of waste heat utilization heat exchanger is connect with the entrance of amine liquid flash column,The cold flow outlet of poor rich amine solution heat exchanger is connect with the entrance of amine liquid regenerator,The top exit of amine liquid regenerator and the hot inlet of waste heat utilization heat exchanger connect,The hot outlets of waste heat utilization heat exchanger are connect with the hot inlet of regeneration overhead condenser,The hot outlets of regeneration overhead condenser are connect with the entrance of regenerator return tank,The bottom liquid outlet of regenerator return tank is connect by reflux pump with the entrance of amine liquid regenerator.
Description
Technical field
The utility model is related to a kind of amine liquid regenerative systems applied to Floating Liquefied Natural Gas facility.
Background technology
In the gas purifying process of FLNG (Floating Liquefied Natural Gas facility), the amine in generally use chemical absorption method
Method depickling carries out depickling processing, i.e., weakly alkaline amine liquid and sour gas (the mainly H in natural gas to unstripped gas2S and CO2)
Reaction forms compound.Then, when absorbing the raising of rich amine solution temperature, the pressure reduction of sour gas, which divides
Solution releases sour gas, and rich amine solution is regenerated as poor amine liquid.
Amine liquid regenerator is exactly to enter regenerator using the heated rising hot gases of tower bottom reboiler to heat from tower top
Rich amine solution makes compound decompose to give off sour gas, to which regeneration obtains poor amine liquid.And sour gas (and the band being evaporated
Have amine liquid steam) enter regenerator return tank by tower top sea water condenser, the sour gas not condensed by demister from
It opens regenerator return tank and enters incinerator, the liquid for the pot bottom that flows back is refluxed at the top of pumping to regenerator.Regeneration overhead is evaporated
The sour gas gone out will be cooled to 50 DEG C by sea water condenser from 97 DEG C.A large amount of heat is taken away by seawater, on the one hand exists big
Amount latent heat, which is unable to get, to be efficiently used, and seawater environmental protection is on the other hand also unfavorable for, it is therefore necessary to be carried out to the heat of this part
It utilizes.
Invention content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of amine liquid applied to Floating Liquefied Natural Gas facility
Regenerative system, the system can efficiently use regeneration overhead gas waste heat, to improve the heat of entire amine liquid regenerative system
Utilization rate, and environmental-protecting performance is improved to a certain extent.
To achieve the above object, the utility model uses following technical scheme：One kind is set applied to Floating Liquefied Natural Gas
The amine liquid regenerative system applied, it is characterised in that：Amine absorption tower including being provided with unstripped gas entrance, the amine absorption tower
Top exit is connect with the hot inlet of processing gas heat exchanger, hot outlets and the processing gas surge tank of the processing gas heat exchanger
Entrance connection, it is described processing gas surge tank top gas outlet is connect with incinerator, it is described handle gas surge tank bottom
The outlet at bottom of liquid outlet and the amine absorption tower is connected to the cold inlet of waste heat utilization heat exchanger after converging, described remaining
The cold flow outlet of heat utilization heat exchanger is connect with the entrance of amine liquid flash column, and the top gas of the amine liquid flash column is exported and burnt
Stove connection is burnt, the bottom liquid outlet of the amine liquid flash column is connect with the cold inlet of poor rich amine solution heat exchanger, described rich or poor
The cold flow outlet of amine liquid heat exchanger is connect with the entrance of amine liquid regenerator, top exit and the waste heat of the amine liquid regenerator
It is connected using the hot inlet of heat exchanger, the hot-fluid of the hot outlets and regeneration overhead condenser of the waste heat utilization heat exchanger enters
Mouth connection, the hot outlets of the regeneration overhead condenser are connect with the entrance of regenerator return tank, the regenerator return tank
Top gas outlet connect with incinerator, the bottom liquid outlet of the regenerator return tank passes through reflux pump and the amine liquid
The entrance of regenerator connects；The outlet at bottom of the amine liquid regenerator is connect with the cold inlet of regeneration tower bottom reboiler, described
Hot-fluid import to the hot outlets of regeneration tower bottom reboiler have heating agent to pass through, the cold flow outlet of the regeneration tower bottom reboiler and institute
State amine liquid regenerator bottom poor amine liquid outlet converge after be connected to the hot inlet of the poor rich amine solution heat exchanger, it is described rich or poor
The entrance of the poor amine liquid cooler of hot outlets of amine liquid heat exchanger connects, outlet and the amine liquid storage tank of the poor amine liquid cooler
Entrance connects, and the outlet of the amine liquid storage tank connect with the entrance of poor amine liquid high-pressure pump, the outlet of the poor amine liquid high-pressure pump and
The entrance of the amine absorption tower connects.
The cold flow outlet of the poor rich amine solution heat exchanger is also connect with the entrance of the amine liquid flash column.
The cold flow outlet of the regeneration tower bottom reboiler is also connect with the entrance of the amine liquid regenerator.
The utility model has the following advantages due to taking above technical scheme：1, the utility model is due to improving
The rich amine solution temperature of column overhead is regenerated into amine liquid, therefore can reduce the thermic load of regeneration tower bottom reboiler.2, this practicality is new
Type realizes amine liquid regenerator tower overhead gas UTILIZATION OF VESIDUAL HEAT IN by waste heat utilization heat exchanger, it is possible thereby to reduce regeneration overhead condenser
The heat exchange load of seawater to reduce equipment investment and operating cost, and achievees the purpose that environmental protection.3, the utility model will be existing
Amine liquid flash tank in amine liquid regeneration technology is changed to amine liquid flash column, by part by poor amine liquid heat after rich amine solution take back to
Amine liquid flash column, to rich amine solution in tower heat thick de-, for FLNG devices, can preferably ensure follow-up amine liquid again
The regeneration efficiency of raw tower.4, the utility model improves the temperature that rich amine solution enters amine liquid flash column using waste heat utilization heat exchanger,
Therefore CO can be improved2With the amount of precipitation of methane.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
Specific implementation mode
The utility model is described in detail with reference to the accompanying drawings and examples.
The utility model proposes a kind of amine liquid regenerative systems applied to Floating Liquefied Natural Gas facility, including are provided with
The top exit of the amine absorption tower a of unstripped gas entrance, amine absorption tower a are connect with the hot inlet of processing gas heat exchanger b, are located
The hot outlets of qi-regulating heat exchanger b connects with the entrance of processing gas surge tank c, the top gas outlet of processing gas surge tank c and
Incinerator connection, the bottom liquid outlet of processing gas surge tank c and the outlet at bottom of amine absorption tower a are connected to waste heat after converging
Using the cold inlet of heat exchanger d, the cold flow outlet of waste heat utilization heat exchanger d is connect with the entrance of amine liquid flash column e, and amine liquid dodges
The top gas outlet for steaming tower e is connect with incinerator, and the bottom liquid outlet of amine liquid flash column e is with poor rich amine solution heat exchanger f's
Cold inlet connects, and the cold flow outlet of poor rich amine solution heat exchanger f is connect with the entrance of amine liquid regenerator g, the top of amine liquid regenerator g
Portion outlet is connect with the hot inlet of waste heat utilization heat exchanger d, and hot outlets and the regeneration overhead of waste heat utilization heat exchanger d condense
The hot inlet of device h connects, and the hot outlets of regeneration overhead condenser h are connect with the entrance of regenerator return tank i, and regenerator returns
The top gas outlet of stream tank i is connect with incinerator, and the bottom liquid outlet of regenerator return tank i passes through reflux pump j and amine liquid
The entrance of regenerator g connects；The outlet at bottom of amine liquid regenerator g is connect with the cold inlet of regeneration tower bottom reboiler k, regenerator
Hot-fluid import to the hot outlets of bottom reboiler k have heating agent to pass through, cold flow outlet and the amine liquid regenerator of regeneration tower bottom reboiler k
The poor amine liquid outlet in bottom of g is connected to the hot inlet of poor rich amine solution heat exchanger f, the hot-fluid of poor rich amine solution heat exchanger f after converging
The entrance connection of poor amine liquid cooler l is exported, the outlet of poor amine liquid cooler l is connect with the entrance of amine liquid storage tank m, amine liquid storage tank
The outlet of m is connect with the entrance of poor amine liquid high-pressure pump n, and the outlet of poor amine liquid high-pressure pump n is connect with the entrance of amine absorption tower a.
Further, the cold flow outlet of poor rich amine solution heat exchanger f is also connect with the entrance of amine liquid flash column e so that by amine
For the rich amine solution of the bottoms liquid flash column e outflow after being heated by poor amine liquid, small part is back to amine liquid flash column e.
Further, the cold flow outlet of regeneration tower bottom reboiler k is also connect with the entrance of amine liquid regenerator g.
Based on above application in the amine liquid regenerative system of Floating Liquefied Natural Gas facility, the utility model also proposed one kind
Amine liquid regeneration technology, includes the following steps：
1) unstripped gas is introduced into amine absorption tower a, depickling, the original after depickling is contacted with poor amine liquid in amine absorption tower a
Material gas enters processing gas heat exchanger b and seawater to make heat exchange, and the unstripped gas after cooling enters processing gas surge tank c；Handle gas surge tank c
After the liquid object of bottom and the rich amine solution of the bottoms amine absorption tower a outflow converge, exchange heat into waste heat utilization heat exchanger d, heat exchange
Rich amine solution after heating enters amine liquid flash column e progress acid gas and slightly takes off, the methane and CO being precipitated in flash process2Gas, which enters, to be burnt
Stove is burnt, the rich amine solution after flash distillation is heated in poor rich amine solution heat exchanger f by poor amine liquid, subsequently into amine liquid regenerator g；
2) rich amine solution for entering amine liquid regenerator g is heated by uprising gas heated regeneration tower bottom reboiler k, is decomposed
Release sour gas；The gas enters waste heat utilization heat exchanger d and exchanges heat with the rich amine solution for being prepared to enter into amine liquid flash column e,
Enter regenerator return tank i subsequently into regeneration overhead condenser h, after condensation and carries out gas phase and liquid phase separation, the gas isolated
Body portion enters incinerator, and liquid returns to amine liquid regenerator g by reflux pump j；
3) poor rich amine solution heat exchanger f is introduced by the poor amine liquid of amine liquid regenerator g and the k outflows of regeneration tower bottom reboiler to be aligned
The standby rich amine solution for entering amine liquid regenerator g is heated, and the poor amine liquid after heat exchange is cooled down by poor amine liquid cooler l, using
Poor amine liquid high-pressure pump n is sent to amine absorption tower a.
The utility model technique is the improvement to prior art, and the difference relative to prior art is as follows：
(1) by the hot inlet of amine liquid regenerator g top gas access waste heat utilization heat exchanger d, amine liquid regenerator g top gas is reduced
Temperature is reduced to 82 DEG C or so from about 100 DEG C, recycles the heat of tower overhead gas；
(2) tower overhead gas enters regeneration overhead condenser h and exchanges heat to 50 DEG C after exchanging heat；
(3) condensed tower overhead gas enters regenerator return tank i progress gas phases and liquid phase separation；
(4) in step (3), a large amount of CO are contained in the gas phase that gas phase and liquid phase separation obtain2And H2S, gas phase carry out CO2's
It is discharged after trapping or purified processing, liquid phase material is transported to by reflux pump j at the top of regenerator；
(5) amine liquid flash column e entrance logistics is accessed into waste heat utilization heat exchanger d cold inlets, is improved into tower by heat exchange
About 10 DEG C of rich amine solution temperature；
(6) rich amine solution of the heating after exchanging heat enters amine liquid flash column e；
(7) in poor rich amine solution heat exchanger f, rich amine solution is heated to about 83 DEG C by poor amine liquid, and rich amine solution is flashed in amine liquid
Acid gas is carried out in tower e slightly to take off；
(8) the flash overhead gas in step (7) contains about 78 DEG C, is directly entered incinerator, does not have to preheating, saves heat；
(9) in step (8) bottoms amine liquid flash column e rich amine solution enter poor rich amine solution heat exchanger f, from about 78 DEG C heat exchange to
About 110 DEG C；
(10) rich amine solution after heating up enters amine liquid regenerator g.
In step (2), overhead stream is exchanged heat by waste heat utilization heat exchanger d and is heated up, reduces the seas regeneration overhead condenser h
The heat exchange load of water.
Since the rich amine solution temperature for entering amine liquid flash column e increases in step (6), (7), the flash distillation in step (7)
CO being precipitated than original technological process in gas more2With methane gas.
In step (10), the more original technological process of rich amine solution temperature due to entering amine liquid regenerator g tower tops increases, and
The thick de- of amine liquid flash column e is lived through, the thermic load of regeneration tower bottom reboiler k is reduced.
The various embodiments described above are merely to illustrate the utility model, and wherein implementation steps of method etc. are all that can be varied from
, every equivalents carried out on the basis of technical solutions of the utility model and improvement should not exclude new in this practicality
Except the protection domain of type.
Claims (3)
1. a kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility, it is characterised in that：Including being provided with unstripped gas
The top exit of the amine absorption tower of entrance, the amine absorption tower is connect with the hot inlet of processing gas heat exchanger, the place
The hot outlets of qi-regulating heat exchanger with processing gas surge tank entrance connect, it is described processing gas surge tank top gas outlet and
Incinerator connection, the bottom liquid outlet of the processing gas surge tank and the outlet at bottom of the amine absorption tower connect after converging
To the cold inlet of waste heat utilization heat exchanger, the cold flow outlet of the waste heat utilization heat exchanger and the entrance of amine liquid flash column connect
Connect, the outlet of the top gas of the amine liquid flash column is connect with incinerator, the bottom liquid outlet of the amine liquid flash column with it is poor
The cold inlet of rich amine solution heat exchanger connects, and the cold flow outlet of the poor rich amine solution heat exchanger and the entrance of amine liquid regenerator connect
It connects, the top exit of the amine liquid regenerator is connect with the hot inlet of the waste heat utilization heat exchanger, and the UTILIZATION OF VESIDUAL HEAT IN is changed
The hot outlets of hot device are connect with the hot inlet of regeneration overhead condenser, the hot outlets of the regeneration overhead condenser with again
The top gas outlet of the entrance connection of raw tower return tank, the regenerator return tank is connect with incinerator, and the regenerator returns
The bottom liquid outlet of stream tank is connect by reflux pump with the entrance of the amine liquid regenerator；The bottom of the amine liquid regenerator goes out
Mouth is connect with the cold inlet of regeneration tower bottom reboiler, and hot-fluid import to the hot outlets of the regeneration tower bottom reboiler have heating agent
Pass through, the cold flow outlet of the regeneration tower bottom reboiler is connected to after converging with the poor amine liquid outlet in the bottom of the amine liquid regenerator
The entrance of the hot inlet of the poor rich amine solution heat exchanger, the poor amine liquid cooler of hot outlets of the poor rich amine solution heat exchanger connects
It connects, the outlet of the poor amine liquid cooler is connect with the entrance of amine liquid storage tank, the outlet of the amine liquid storage tank and poor amine liquid high pressure
The entrance of pump connects, and the outlet of the poor amine liquid high-pressure pump is connect with the entrance of the amine absorption tower.
2. a kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility as described in claim 1, it is characterised in that：
The cold flow outlet of the poor rich amine solution heat exchanger is also connect with the entrance of the amine liquid flash column.
3. a kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility as described in claim 1, it is characterised in that：
The cold flow outlet of the regeneration tower bottom reboiler is also connect with the entrance of the amine liquid regenerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820140883.XU CN207793187U (en) | 2018-01-26 | 2018-01-26 | A kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820140883.XU CN207793187U (en) | 2018-01-26 | 2018-01-26 | A kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility |
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| CN207793187U true CN207793187U (en) | 2018-08-31 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048147A (en) * | 2018-01-26 | 2018-05-18 | 中海石油气电集团有限责任公司 | A kind of amine liquid regenerative system and technique applied to Floating Liquefied Natural Gas facility |
| CN110201490A (en) * | 2019-06-21 | 2019-09-06 | 江苏新海石化有限公司 | A kind of amine liquid regenerative system |
| CN115523004A (en) * | 2022-10-18 | 2022-12-27 | 北京百利时能源技术股份有限公司 | Amine process CO 2 Process medium heat energy recovery combined power generation device and method in trapping device |
-
2018
- 2018-01-26 CN CN201820140883.XU patent/CN207793187U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108048147A (en) * | 2018-01-26 | 2018-05-18 | 中海石油气电集团有限责任公司 | A kind of amine liquid regenerative system and technique applied to Floating Liquefied Natural Gas facility |
| CN108048147B (en) * | 2018-01-26 | 2023-11-21 | 中海石油气电集团有限责任公司 | Amine liquid regeneration system and process applied to floating liquefied natural gas facility |
| CN110201490A (en) * | 2019-06-21 | 2019-09-06 | 江苏新海石化有限公司 | A kind of amine liquid regenerative system |
| CN115523004A (en) * | 2022-10-18 | 2022-12-27 | 北京百利时能源技术股份有限公司 | Amine process CO 2 Process medium heat energy recovery combined power generation device and method in trapping device |
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