CN206219538U - A kind of gas processing system - Google Patents
A kind of gas processing system Download PDFInfo
- Publication number
- CN206219538U CN206219538U CN201621161678.9U CN201621161678U CN206219538U CN 206219538 U CN206219538 U CN 206219538U CN 201621161678 U CN201621161678 U CN 201621161678U CN 206219538 U CN206219538 U CN 206219538U
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- amine liquid
- amine
- natural gas
- gas
- liquid
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Abstract
The utility model is related to liquefied natural gas processing technique field, specifically discloses a kind of gas processing system, including LNG storage tank, absorption tower, and cooling system, amine liquid and flashed vapour recycling system are connected with absorption tower；The cooling system includes the cooler, heat exchanger, molecular sieve, the ice chest that are sequentially connected；The amine liquid and flashed vapour recycling system include the amine liquid flash tank, knockout drum, amine liquid collecting tank, poor rich amine solution heat exchanger, the amine liquid regeneration boiler that are sequentially connected；From bottom to top flowed from LNG storage tank natural gas out from tower bottom is absorbed, flowed down from absorption tower top from the amine liquid of amine liquid regeneration boiler outflow, amine liquid and natural gas counter current contact, amine liquid enters amine liquid and flashed vapour recovery system after absorbing the sour gas in natural gas, removes acid natural gas and enters cooling system.The utility model has the advantages that, the natural gas temperature before ice chest is lowered into, reduce cryogen consumption；The fuel gas that will be flashed off simultaneously is reclaimed, and effectively reaches energy-saving purpose.
Description
Technical field
The utility model is related to liquefied natural gas processing technique field, particularly relates to a kind of gas processing system.
Background technology
Sour gas therein will be removed during natural gas processing first, gas and amine liquid will be separated afterwards, taken off
Removal of acid gases needs to use amine liquid flash tank, and former technological process is to enter the sudden strain of a muscle of amine liquid after the carbon dioxide in the complete natural gas of amine absorption
Steaming pot, amine liquid is flashed in this storage tank, and the gas for flashing off contains a large amount of methane, and this portion gas is put by pressure-control valve
Sky to torch is burnt.A large amount of fuel gas containing methane that amine liquid flash tank is flashed off are sent directly into torch combustion
Burn, this part energy can not be utilized effectively, cause to waste.
The ice chest used in liquefied natural gas has strict control due to material cause, the natural gas temperature to entering ice chest
System is required i.e. not above 66 DEG C.Current equipment causes natural gas temperature drift before ice chest is entered, and highest can reach
46.5 DEG C, into ice chest after need the more cryogen of consumption to carry out it heat exchange cooling to can be only achieved -162 DEG C, production cost increases
Plus, if into ice chest natural gas temperature more than 66 DEG C, the chain parking of device will be caused.
The content of the invention
The purpose of this utility model is to provide a kind of gas processing system, is lowered into the natural gas temperature before ice chest,
The temperature difference of natural gas and cryogen is reduced, cryogen consumption is reduced；The fuel gas that will be flashed off simultaneously is reclaimed, used as fuel
Gas is used, and effectively reaches energy-saving purpose.
To achieve these goals, the utility model employs following technical scheme：A kind of gas processing system, bag
LNG storage tank, absorption tower are included, cooling system, amine liquid and flashed vapour recycling system are connected with absorption tower；
The cooling system includes the cooler, heat exchanger, molecular sieve, the ice chest that are sequentially connected；
The amine liquid and flashed vapour recycling system include that the amine liquid flash tank being sequentially connected, knockout drum, amine liquid are collected
Tank, poor rich amine solution heat exchanger, amine liquid regeneration boiler；
Air inlet from after the scrubbed removing solid and liquid impurities of LNG storage tank natural gas out from absorption tower bottom is under
And upper flowing, from top to bottom flowed down from absorption tower top from the amine liquid of amine liquid regeneration boiler outflow, amine liquid and natural gas pair
Stream contact, amine liquid enters amine liquid and flashed vapour recovery system after absorbing the sour gas in natural gas, removes acid natural gas
Into cooling system；
The gas flashed off from amine liquid flash tank flows into amine liquid receipts by flowing into fuelgas pipeline, rich amine solution after knockout drum
Collection tank, through poor rich amine solution heat exchanger, rich amine solution enters amine liquid regeneration upper boiler after rising high-temperature, and liquid is along regenerator to dirty
The dynamic high-temperature vapor counter current contacting come with reboiler, most sour gas are desorbed, and recover the poor amine liquid of absorbability
Boiler bottom is regenerated by amine liquid to flow out, exchanged heat with cold rich solution in poor rich amine solution heat exchanger, after supercharging, filtering, further cooling, by
Circulating pump suction absorption tower top.
Wherein, the knockout drum liquid phase pipeline is connected with amine liquid collecting tank, and vapor delivery line is connected with fuelgas pipeline.
Wherein, the absorption tower bottom is provided with air inlet, and top is provided with amine liquid/gas separator；
Wherein, the cooler is connected with the refrigerant compressor for lowering the temperature；Filter is provided with the molecular sieve.
Wherein, the molecular sieve at least two, is set up in parallel.
The beneficial effects of the utility model are：The fuel gas that amine liquid flash tank is flashed off effectively is used work
For fuel gas is used, the rich amine solution isolated is collected and can regenerated with amine liquid collecting tank, it is to avoid cause to waste.
Cooler and heat exchanger both of which can lower the temperature to natural gas, and natural gas is carried out further using recirculated water effectively
Secondary cooling treatment, both can guarantee that natural gas enter molecular sieve under low-temperature condition after dehydrating effect, cryogen consumption can be reduced again,
30 DEG C are dropped into the natural gas temperature before ice chest, refrigerant cycle amount and refrigerant compressor load and power consumption obtain one and fix
Drop, effectively reduces factory's unit processing cost, has reached energy-saving purpose, it is to avoid the risk of unplanned parking, really
After guarantor will not be because of chain parking caused by overtemperature, energy conservation and consumption reduction effects are notable.
Each enter following process system from absorption tower amine liquid out and natural gas, the system overall structure makes all of
The energy is all reasonably processed and processed.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment technical scheme, below will be to make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only the utility model in order to more clearly
The utility model embodiment or technical scheme of the prior art are illustrated, below by institute in p- embodiment or description of the prior art
The accompanying drawing for needing to use is briefly described, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is structural representation of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
A kind of gas processing system as shown in Figure 1, including LNG storage tank, absorption tower, cooling system is connected with absorption tower
System, amine liquid and flashed vapour recycling system；
The cooling system includes the cooler, heat exchanger, molecular sieve, the ice chest that are sequentially connected；
The amine liquid and flashed vapour recycling system include that the amine liquid flash tank being sequentially connected, knockout drum, amine liquid are collected
Tank, poor rich amine solution heat exchanger, amine liquid regeneration boiler；
Air inlet from after the scrubbed removing solid and liquid impurities of LNG storage tank natural gas out from absorption tower bottom is under
And upper flowing, regenerating amine liquid/gas separator of the amine liquid of boiler outflow from the top of absorption tower from the amine liquid from top to bottom flows down, amine
Liquid and natural gas counter current contact, amine liquid enters amine liquid and flashed vapour recovery system, removing after absorbing the sour gas in natural gas
Acid natural gas enters cooling system.
After the natural gas of removing acid gas sequentially passes through cooler, heat exchanger cooling by absorption tower tower top, molecular sieve is flowed into, passed through
Ice chest liquefaction is flowed into after filter and molecular sieve dehydration, -160 DEG C of liquefied natural gas is produced.
The gas flashed off from amine liquid flash tank flows into amine liquid receipts by flowing into fuelgas pipeline, rich amine solution after knockout drum
Collection tank, through poor rich amine solution heat exchanger, rich amine solution enters amine liquid regeneration upper boiler after rising high-temperature, and liquid is along regenerator to dirty
The dynamic high-temperature vapor counter current contacting come with reboiler, most sour gas are desorbed, and recover the poor amine liquid of absorbability
Boiler bottom is regenerated by amine liquid to flow out, exchanged heat with cold rich solution in poor rich amine solution heat exchanger, after supercharging, filtering, further cooling, by
Circulating pump suction absorption tower top.
The absorption tower bottom is provided with air inlet, and top is provided with amine liquid/gas separator.
The cooler is connected with the refrigerant compressor for lowering the temperature；Filter is provided with the molecular sieve.
The heat exchanger connects outer net, and the refrigerant for coming from outer net is changed into heating agent, with the heat of Reasonable Utilization of Natural Gas,
It is energy-saving.
The molecular sieve at least two, is set up in parallel, and either simultaneously or alternately uses.
The knockout drum liquid phase pipeline is connected with amine liquid collecting tank, and vapor delivery line is connected with fuelgas pipeline.Amine liquid is dodged
The fuel gas that steaming pot is flashed off effectively is used and used as fuel gas, the rich amine solution isolated amine liquid collecting tank
Collecting to be regenerated, it is to avoid cause to waste.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (5)
1. a kind of gas processing system, it is characterised in that：Including LNG storage tank, absorption tower, cooling system is connected with absorption tower
System, amine liquid and flashed vapour recycling system；
The cooling system includes the cooler, heat exchanger, molecular sieve, the ice chest that are sequentially connected；
It is amine liquid flash tank that the amine liquid and flashed vapour recycling system include being sequentially connected, knockout drum, amine liquid collecting tank, poor
Rich amine solution heat exchanger, amine liquid regeneration boiler；
From after the scrubbed removing solid and liquid impurities of LNG storage tank natural gas out from the air inlet for absorbing tower bottom from bottom to top
Flowing, from top to bottom flows down from the amine liquid of amine liquid regeneration boiler outflow from absorption tower top, and amine liquid connects with natural gas convection current
Touch, amine liquid enters amine liquid and flashed vapour recovery system after absorbing the sour gas in natural gas, remove acid natural gas and enter
Cooling system；
The gas flashed off from amine liquid flash tank flows into the collection of amine liquid by flowing into fuelgas pipeline, rich amine solution after knockout drum
Tank, through poor rich amine solution heat exchanger, rich amine solution enters amine liquid regeneration upper boiler after rising high-temperature, and liquid flows downward along regenerator
The high-temperature vapor counter current contacting come with reboiler, most sour gas are desorbed, recover the poor amine liquid of absorbability by
Amine liquid regenerates boiler bottom outflow, is exchanged heat with cold rich solution in poor rich amine solution heat exchanger, after supercharging, filtering, further cooling, by following
Ring pumping enters absorption tower top.
2. a kind of gas processing system according to claim 1, it is characterised in that：The knockout drum liquid phase pipeline and amine
Liquid collecting tank is connected, and vapor delivery line is connected with fuelgas pipeline.
3. a kind of gas processing system according to claim 1, it is characterised in that：The absorption tower bottom is provided with air inlet
Mouthful, top is provided with amine liquid/gas separator.
4. a kind of gas processing system according to claim 1, it is characterised in that：The cooler is connected with for dropping
The refrigerant compressor of temperature；Filter is provided with the molecular sieve.
5. a kind of gas processing system according to claim 1, it is characterised in that：The molecular sieve at least two, and
Row are set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161678.9U CN206219538U (en) | 2016-10-25 | 2016-10-25 | A kind of gas processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621161678.9U CN206219538U (en) | 2016-10-25 | 2016-10-25 | A kind of gas processing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206219538U true CN206219538U (en) | 2017-06-06 |
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ID=58788602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621161678.9U Expired - Fee Related CN206219538U (en) | 2016-10-25 | 2016-10-25 | A kind of gas processing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206219538U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113717764A (en) * | 2021-09-13 | 2021-11-30 | 芜湖中燃城市燃气发展有限公司 | Natural gas impurity removal equipment and method with cooling function |
-
2016
- 2016-10-25 CN CN201621161678.9U patent/CN206219538U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113717764A (en) * | 2021-09-13 | 2021-11-30 | 芜湖中燃城市燃气发展有限公司 | Natural gas impurity removal equipment and method with cooling function |
| CN113717764B (en) * | 2021-09-13 | 2023-06-16 | 芜湖中燃城市燃气发展有限公司 | Natural gas impurity removal equipment with cooling function and method |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170606 Termination date: 20181025 |