CN108048147A - A kind of amine liquid regenerative system and technique applied to Floating Liquefied Natural Gas facility - Google Patents
A kind of amine liquid regenerative system and technique applied to Floating Liquefied Natural Gas facility Download PDFInfo
- Publication number
- CN108048147A CN108048147A CN201810076347.2A CN201810076347A CN108048147A CN 108048147 A CN108048147 A CN 108048147A CN 201810076347 A CN201810076347 A CN 201810076347A CN 108048147 A CN108048147 A CN 108048147A
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- amine
- amine liquid
- liquid
- gas
- heat exchanger
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- 150000001412 amines Chemical class 0.000 title claims abstract description 223
- 239000007788 liquid Substances 0.000 title claims abstract description 158
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000007667 floating Methods 0.000 title claims abstract description 14
- 239000003949 liquefied natural gas Substances 0.000 title claims abstract description 14
- 230000001172 regenerating effect Effects 0.000 title claims abstract description 13
- 239000007789 gas Substances 0.000 claims abstract description 85
- 230000008929 regeneration Effects 0.000 claims abstract description 37
- 238000011069 regeneration method Methods 0.000 claims abstract description 37
- 238000010521 absorption reaction Methods 0.000 claims abstract description 28
- 239000002918 waste heat Substances 0.000 claims abstract description 25
- 238000010992 reflux Methods 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 8
- 239000013535 sea water Substances 0.000 claims description 8
- 239000012071 phase Substances 0.000 claims description 7
- 239000007791 liquid phase Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 5
- 238000007701 flash-distillation Methods 0.000 claims description 5
- 238000005191 phase separation Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000008676 import Effects 0.000 claims description 3
- 230000003139 buffering effect Effects 0.000 claims description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 10
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QZAYGJVTTNCVMB-UHFFFAOYSA-N serotonin Chemical compound C1=C(O)C=C2C(CCN)=CNC2=C1 QZAYGJVTTNCVMB-UHFFFAOYSA-N 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1462—Removing mixtures of hydrogen sulfide and carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/103—Sulfur containing contaminants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/10—Working-up natural gas or synthetic natural gas
- C10L3/101—Removal of contaminants
- C10L3/102—Removal of contaminants of acid contaminants
- C10L3/104—Carbon dioxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
- B01D2252/204—Amines
Abstract
The present invention relates to a kind of amine liquid regenerative systems and technique applied to Floating Liquefied Natural Gas facility,The system comprises amine absorption towers,The top exit of amine absorption tower is connected with handling the hot inlet of gas heat exchanger,The hot outlets for handling gas heat exchanger are connected with handling the entrance of 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 connected with the entrance of amine liquid flash column,The cold flow outlet of poor rich amine solution heat exchanger is connected 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 connected with the hot inlet of regeneration overhead condenser,The hot outlets of regeneration overhead condenser are connected with the entrance of regenerator return tank,The bottom liquid outlet of regenerator return tank is connected by reflux pump with the entrance of amine liquid regenerator.
Description
Technical field
The present invention relates to a kind of amine liquid regenerative systems and technique 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 unstripped gas depickling processing, i.e., weakly alkaline amine liquid and sour gas (the mainly H in natural gas2S and CO2)
Reaction forms compound.Then, when the rich amine solution temperature for absorbing sour gas raises, pressure reduces, 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, so as to regenerate to obtain 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 pumping to regenerator top.Regeneration overhead is evaporated
The sour gas gone out will be cooled to 50 DEG C by sea water condenser from 97 DEG C.Substantial amounts of heat is taken away by seawater, on the one hand exists big
Amount latent heat can not be utilized effectively, and on the other hand also be unfavorable for seawater environmental protection, it is therefore necessary to which the heat of this part is carried out
It utilizes.
The content of the invention
In view of the above-mentioned problems, the object of the present invention is to provide a kind of amine liquid regeneration applied to Floating Liquefied Natural Gas facility
System and technique, the system and technique can efficiently use regeneration overhead gas waste heat, so as to improve entire amine liquid regeneration
The heat utilization efficiency of system and environmental-protecting performance is improved to a certain extent.
To achieve the above object, the present invention uses following technical scheme：It is a kind of applied to Floating Liquefied Natural Gas facility
Amine liquid regenerative system, it is characterised in that：Amine absorption tower including being provided with unstripped gas entrance, the top of the amine absorption tower
It exports and is connected with handling the hot inlet of gas heat exchanger, the hot outlets of the processing gas heat exchanger and entering for processing gas surge tank
Mouth connection, the top gas outlet of the processing gas surge tank are connected with incinerator, the bottom liquid of the processing gas surge tank
The outlet at bottom of outlet and the amine absorption tower is connected to the cold inlet of waste heat utilization heat exchanger, the waste heat profit after converging
It is exported with the cold flow of heat exchanger and is connected with the entrance of amine liquid flash column, the top gas outlet of the amine liquid flash column and incinerator
Connection, the bottom liquid outlet of the amine liquid flash column are connected with the cold inlet of poor rich amine solution heat exchanger, the poor rich amine solution
The cold flow outlet of heat exchanger is connected with the entrance of amine liquid regenerator, top exit and the UTILIZATION OF VESIDUAL HEAT IN of the amine liquid regenerator
The hot inlet connection of heat exchanger, the hot outlets of the waste heat utilization heat exchanger connect with the hot inlet of regeneration overhead condenser
It connects, the hot outlets of the regeneration overhead condenser are connected with the entrance of regenerator return tank, the top of the regenerator return tank
Portion's gas vent is connected with incinerator, and the bottom liquid outlet of the regenerator return tank is regenerated by reflux pump and the amine liquid
The entrance connection of tower；The outlet at bottom of the amine liquid regenerator is connected with regenerating the cold inlet of tower bottom reboiler, the regeneration
Hot-fluid import to the hot outlets of tower bottom reboiler have heating agent to pass through the cold flow outlet of the regeneration tower bottom reboiler and the amine
The poor amine liquid outlet in bottom of liquid regenerator is connected to the hot inlet of the poor rich amine solution heat exchanger, the poor rich amine solution after converging
The entrance connection of the poor amine liquid cooler of hot outlets of heat exchanger, the outlet of the poor amine liquid cooler and the entrance of amine liquid storage tank
Connection, the outlet of the amine liquid storage tank is connected with the entrance of poor amine liquid high-pressure pump, the outlet of the poor amine liquid high-pressure pump with it is described
The entrance connection of amine absorption tower.
The entrance that the cold flow of the poor rich amine solution heat exchanger exports also with the amine liquid flash column is connected.
The entrance that the cold flow of the regeneration tower bottom reboiler is exported also with the amine liquid regenerator is connected.
A kind of amine liquid regeneration technology applied to Floating Liquefied Natural Gas facility comprises the following steps：1) unstripped gas is drawn
Enter amine absorption tower, depickling contacted with poor amine liquid in amine absorption tower, the unstripped gas after depickling enter processing gas heat exchanger with
Seawater to make heat exchange, the unstripped gas after cooling enter processing gas surge tank；Handle the liquid object and amine absorption tower of gas buffering pot bottom
It after the rich amine solution of bottom outflow converges, exchanges heat into waste heat utilization heat exchanger, the rich amine solution after heat exchange heating enters the flash distillation of amine liquid
Tower carries out acid gas and slightly takes off, the methane and CO being precipitated in flash process2Gas enters incinerator, and the rich amine solution after flash distillation is in rich or poor amine
It is heated in liquid heat exchanger by poor amine liquid, subsequently into amine liquid regenerator；2) rich amine solution of amine liquid regenerator is entered by by regenerator
The heated uprising gas heating of bottom reboiler, decomposes to give off sour gas；The gas enters waste heat utilization heat exchanger with preparing
Rich amine solution into amine liquid flash column exchanges heat, and subsequently into regeneration overhead condenser, regenerator return tank is entered after condensation
It carries out gas phase and liquid phase separation, the gas part isolated enters incinerator, liquid is pumped back to amine liquid regenerator by reflux；3)
Poor rich amine solution heat exchanger is introduced into being prepared to enter into amine liquid again by the poor amine liquid of amine liquid regenerator and regeneration tower bottom reboiler outflow
The rich amine solution of raw tower is heated, and the poor amine liquid after heat exchange is cooled down by poor amine liquid cooler, is pumped by using poor amine liquid
To amine absorption tower.
The present invention has the following advantages due to taking above technical scheme：1st, the present invention enters amine liquid due to improving
The rich amine solution temperature of column overhead is regenerated, therefore the thermic load of regeneration tower bottom reboiler can be reduced.2nd, the present invention passes through waste heat profit
Amine liquid regenerator tower overhead gas UTILIZATION OF VESIDUAL HEAT IN is realized with heat exchanger, it is possible thereby to which the heat exchange for reducing regeneration overhead condenser seawater is born
Lotus so as to reduce equipment investment and operating cost, and achievees the purpose that environmental protection.3rd, the present invention will be in existing amine liquid regeneration technology
Amine liquid flash tank is changed to amine liquid flash column, and the rich amine solution after part is heated by poor amine liquid is taken back to amine liquid flash column, to tower
Middle rich amine solution, which heat, slightly to be taken off, and for FLNG devices, can preferably ensure the regeneration efficiency of follow-up amine liquid regenerator.
4th, the present invention enters the temperature of amine liquid flash column using waste heat utilization heat exchanger raising rich amine solution, therefore can improve CO2And first
The amount of precipitation of alkane.
Description of the drawings
Fig. 1 is the process flow diagram of the present invention.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
The present invention proposes a kind of amine liquid regenerative system applied to Floating Liquefied Natural Gas facility, including being provided with raw material
The top exit of the amine absorption tower a of gas entrance, amine absorption tower a are connected with handling the hot inlet of gas heat exchanger b, handle gas
The hot outlets of heat exchanger b are connected with handling the entrance of gas surge tank c, the top gas outlet and burning of processing gas surge tank c
Stove connection, the bottom liquid outlet of processing gas surge tank c and the outlet at bottom of amine absorption tower a are connected to UTILIZATION OF VESIDUAL HEAT IN after converging
The cold inlet of heat exchanger d, the cold flow outlet of waste heat utilization heat exchanger d are connected with the entrance of amine liquid flash column e, amine liquid flash column
The top gas outlet of e is connected with incinerator, the cold flow of the bottom liquid outlet of amine liquid flash column e and poor rich amine solution heat exchanger f
Entrance connects, and the cold flow outlet of poor rich amine solution heat exchanger f is connected with the entrance of amine liquid regenerator g, is gone out at the top of amine liquid regenerator g
Mouth is connected with the hot inlet of waste heat utilization heat exchanger d, hot outlets and the regeneration overhead condenser h of waste heat utilization heat exchanger d
Hot inlet connection, the hot outlets of regeneration overhead condenser h are connected with the entrance of regenerator return tank i, and regenerator flows back
The top gas outlet of tank i is connected with incinerator, the bottom liquid outlet of regenerator return tank i by reflux pump j with amine liquid again
The entrance connection of raw tower g；The outlet at bottom of amine liquid regenerator g is connected with regenerating the cold inlet of tower bottom reboiler k, regenerator bottom
Hot-fluid import to the hot outlets of reboiler k have heating agent to pass through cold flow outlet and the amine liquid regenerator g of regeneration tower bottom reboiler k
Bottom poor amine liquid outlet converge after be connected to the hot inlet of poor rich amine solution heat exchanger f, the hot-fluid of poor rich amine solution heat exchanger f goes out
The entrance connection of the poor amine liquid cooler l of mouth, the outlet of poor amine liquid cooler l are connected with the entrance of amine liquid storage tank m, amine liquid storage tank m
Outlet be connected with the entrance of poor amine liquid high-pressure pump n, the outlet of poor amine liquid high-pressure pump n is connected with the entrance of amine absorption tower a.
Further, the entrance that the cold flow of poor rich amine solution heat exchanger f is exported also with amine liquid flash column e is connected so that by amine
For the rich amine solution of liquid flash column e bottoms outflow after being heated by poor amine liquid, small part is back to amine liquid flash column e.
Further, entrance of the cold flow outlet of tower bottom reboiler k also with amine liquid regenerator g is regenerated to be connected.
Based on above application in the amine liquid regenerative system of Floating Liquefied Natural Gas facility, the invention also provides a kind of amine liquid
Regeneration technology comprises the following steps：
1) unstripped gas is introduced into amine absorption tower a, contacts depickling with poor amine liquid in amine absorption tower a, the original after depickling
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 amine absorption tower a bottoms 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) heated, decomposed by uprising gas heated regeneration tower bottom reboiler k into the rich amine solution of amine liquid regenerator g
Release sour gas；The gas enters waste heat utilization heat exchanger d and exchanges heat with being prepared to enter into the rich amine solution of amine liquid flash column e,
Subsequently into regeneration overhead condenser h, gas phase and liquid phase separation, the gas isolated are carried out into regenerator return tank i after condensation
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 into 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.
Present invention process is the improvement to existing process, as follows compared with the difference of existing process：
(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) logistics of amine liquid flash column e entrances is accessed into waste heat utilization heat exchanger d cold inlets, is improved by heat exchange into tower
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, without preheating, saves heat；
(9) in step (8) rich amine solution of amine liquid flash column e bottoms into poor rich amine solution heat exchanger f, from about 78 DEG C of 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, reduce regeneration overhead condenser h seas
The heat exchange load of water.
Since the rich amine solution temperature into amine liquid flash column e raises 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), due to the more original technological process rise of rich amine solution temperature into amine liquid regenerator g tower tops, and
The thick de- of amine liquid flash column e is lived through, reduces the thermic load of regeneration tower bottom reboiler k.
The various embodiments described above are merely to illustrate the present invention, and wherein implementation steps of method etc. can be all varied from,
Every equivalents carried out on the basis of technical solution of the present invention and improvement, should not exclude in protection scope of the present invention
Outside.
Claims (4)
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 amine absorption tower of entrance, the top exit of the amine absorption tower are connected with handling the hot inlet of gas heat exchanger, the place
The hot outlets of qi-regulating heat exchanger with handle gas surge tank entrance be connected, it is described processing gas surge tank top gas outlet and
Incinerator connects, and the bottom liquid outlet for handling gas surge tank is connected after converging with the outlet at bottom of the amine absorption tower
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 connected with incinerator, the bottom liquid outlet of the amine liquid flash column with it is poor
The cold inlet connection of rich amine solution heat exchanger, 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 connected 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 connected with the hot inlet of regeneration overhead condenser, the hot outlets of the regeneration overhead condenser with again
The entrance connection of raw tower return tank, the top gas outlet of the regenerator return tank are connected with incinerator, and the regenerator returns
The bottom liquid outlet of stream tank is connected by reflux pump with the entrance of the amine liquid regenerator；The bottom of the amine liquid regenerator goes out
Mouth is connected with regenerating the cold inlet of tower bottom reboiler, and hot-fluid import to the hot outlets of the regeneration tower bottom reboiler have heating agent
By the way that 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 hot inlet of the poor rich amine solution heat exchanger, the entrance of the poor amine liquid cooler of hot outlets of the poor rich amine solution heat exchanger connect
It connects, the outlet of the poor amine liquid cooler is connected with the entrance of amine liquid storage tank, the outlet of the amine liquid storage tank and poor amine liquid high pressure
The entrance connection of pump, the outlet of the poor amine liquid high-pressure pump is connected 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 entrance that the cold flow of the poor rich amine solution heat exchanger exports also with the amine liquid flash column is connected.
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 entrance that the cold flow of the regeneration tower bottom reboiler is exported also with the amine liquid regenerator is connected.
4. a kind of regenerate system based on the amine liquid as described in any one of claims 1 to 3 applied to Floating Liquefied Natural Gas facility
The amine liquid regeneration technology united and implemented, comprises the following steps：
1) by unstripped gas introduce amine absorption tower, contact depickling with poor amine liquid in amine absorption tower, the unstripped gas after depickling into
Enter to handle gas heat exchanger and seawater to make heat exchange, the unstripped gas after cooling enters processing gas surge tank；Handle the liquid of gas buffering pot bottom
After state object and the rich amine solution of amine absorption tower bottom outflow converge, exchange heat into waste heat utilization heat exchanger, the richness after heat exchange heating
Amine liquid enters amine liquid flash column progress acid gas and slightly takes off, the methane and CO being precipitated in flash process2Gas enters incinerator, after flash distillation
Rich amine solution in poor rich amine solution heat exchanger by poor amine liquid heat, subsequently into amine liquid regenerator；
2) heated into the rich amine solution of amine liquid regenerator by the heated uprising gas of regeneration tower bottom reboiler, decompose to give off acid
Property gas；The gas enters waste heat utilization heat exchanger and exchanges heat with being prepared to enter into the rich amine solution of amine liquid flash column, subsequently into
Regeneration overhead condenser carries out gas phase and liquid phase separation after condensation into regenerator return tank, and the gas part isolated enters
Incinerator, liquid are pumped back to amine liquid regenerator by reflux；
3) poor rich amine solution heat exchanger is introduced into being prepared to enter by the poor amine liquid of amine liquid regenerator and regeneration tower bottom reboiler outflow
The rich amine solution of amine liquid regenerator is heated, and the poor amine liquid after heat exchange is cooled down by poor amine liquid cooler, high using poor amine liquid
Pressure is pumped to amine absorption tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076347.2A CN108048147B (en) | 2018-01-26 | 2018-01-26 | Amine liquid regeneration system and process applied to floating liquefied natural gas facility |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810076347.2A CN108048147B (en) | 2018-01-26 | 2018-01-26 | Amine liquid regeneration system and process applied to floating liquefied natural gas facility |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108048147A true CN108048147A (en) | 2018-05-18 |
| CN108048147B CN108048147B (en) | 2023-11-21 |
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ID=62124652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810076347.2A Active CN108048147B (en) | 2018-01-26 | 2018-01-26 | Amine liquid regeneration system and process applied to floating liquefied natural gas facility |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN110527572A (en) * | 2019-09-11 | 2019-12-03 | 张家港富瑞特种装备股份有限公司 | A kind of natural gas depickling module |
| CN116445196A (en) * | 2023-04-03 | 2023-07-18 | 广州兴丰能源科技有限公司 | Method and device for efficiently regenerating amine liquid of coupling heat pump |
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