CN207845588U - A kind of LNG skids deacidification system - Google Patents
A kind of LNG skids deacidification system Download PDFInfo
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- CN207845588U CN207845588U CN201820111331.6U CN201820111331U CN207845588U CN 207845588 U CN207845588 U CN 207845588U CN 201820111331 U CN201820111331 U CN 201820111331U CN 207845588 U CN207845588 U CN 207845588U
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- mdea
- amine liquid
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- absorption
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Abstract
The utility model discloses a kind of LNG skids deacidification system, including absorption system, regenerative system and filtration system, unstripped gas removes carbon dioxide and hydrogen sulfide, organic sulfur etc. through absorption system, MDEA amine absorptions carbon dioxide and hydrogen sulfide, and it is recycled between regenerative system and filtration system, filtration system includes amine liquid storage tank, antifoaming agent storage tank, amine liquid combination filter and lean solution booster pump, amine liquid storage tank and amine liquid combination filter are connected with lean solution booster pump respectively by pipeline, and antifoaming agent storage tank is disposed on amine liquid storage tank；Amine liquid combination filter top and lower part increase filter element, and filter medium is loaded in bed among amine liquid combination filter.The absorption towers MDEA and MDEA regenerators are all made of new packing and reduce equipment size, reduce device height, and design height is no more than 10 meters, and making into sled, size is small, convenient transportation.
Description
Technical field
The utility model is related to a kind of coal chemical industry, petrochemical industry and oil and gas exploitation deacidification systems more particularly to one
Kind LNG skid deacidification systems.
Background technology
During oil exploitation, it is frequently accompanied by associated gas generation and gas exploitation course, some gas fields
Since yield is not high, if transported using pipeline installation, cost is too high.Natural gas liquefies liquefied natural gas is made on the spot（LNG）
Transport is very economic way.
Natural gas is purified before liquefaction, and technical process includes：Metering, de- sour gas, dehydration, liquefaction
And storage etc..In natural gas liquefaction project, decarburization unit generally uses decarburizer absorption and regeneration technique.Traditional handicraft is due to setting
Standby efficiency is low, bigger, highly relatively high, the equipment investment cost height on the absorption towers MDEA and MDEA regenerator size designs, and
And usually skid is used to design Unconventional gas, and skid transport needs control device size, in existing design, tower
Height, it is high at transportation cost after sled, lose the flexible and convenient characteristic of skid.
Utility model content
The main purpose of the utility model is that overcoming defect existing for existing skid deacidification system, and provide a kind of
LNG skid deacidification systems, while ensureing using effect reduce equipment size, be convenient for field application, convenience in transport, to
It is more suitable for practicality, and with the utility value in industry.
The utility model is realized using following scheme：
The utility model proposes LNG skid deacidification systems, including absorption system, regenerative system and filtration system, raw material
Gas removes carbon dioxide, hydrogen sulfide and organic sulfur through absorption system, and MDEA amine absorptions carbon dioxide is in regenerative system and mistake
It being recycled between filter system, filtration system includes amine liquid storage tank, antifoaming agent storage tank, amine liquid combination filter and lean solution booster pump,
Amine liquid storage tank and amine liquid combination filter are connected with lean solution booster pump respectively by pipeline, and defoaming is disposed on amine liquid storage tank
Agent storage tank；Amine liquid combination filter top and lower part increase filter element, are loaded in bed among amine liquid combination filter
Filter medium.
Preferably, LNG skids deacidification system above-mentioned, absorption system includes raw material gas-liquid separator, purified gas
Heat exchanger and the absorption towers MDEA, raw material gas-liquid separator are connected by pipeline with purified gas heat exchanger, and purified gas heat exchanger is logical
Piping is connected with the absorption towers MDEA；The height on the absorption towers MDEA is less than 10 meters；The premise for reducing the absorption towers MDEA is to ensure
Deacidification effect, using new type high-efficient packing, optimization calculates the characteristic parameter of filler, using peak height 3.5mm, ripple inclination angle 30-
45 °, work surface area is referred to as 750-800m2/m3, optimal surface area is 790 m2/m3Filler；It effectively reduces MDEA and absorbs tower height
Degree is reduced to 8-10 meters of height from original 25 meters of height of absorption tower.
Preferably, LNG skids deacidification system above-mentioned, regenerative system include MDEA regeneration Tower Systems and rich solution into
Expect that preheater, MDEA regeneration Tower Systems are connected with rich solution feed preheater by pipeline, the height that MDEA regenerates Tower System is small
In 10 meters.
Preferably, LNG skids deacidification system above-mentioned, MDEA regenerates is provided with condenser at the top of Tower System,
The bottom of MDEA regeneration Tower Systems is provided with reboiler；In traditional handicraft regenerate Tower System by regenerator, regeneration tower bottom reboiler,
Regeneration overhead condenser forms, and equipment is more, technology controlling and process is complicated；Three equipment are designed to one by the utility model, shape
Tower System is regenerated at MDEA, overhead vapours is directly entered regenerator, the tower of system after the condenser condensation on regenerative system top
Particular usage valve is set on the reboiler of bottom and ensures that steam rises in reboiler, lime set can enter reboiler by downspout, reduce and set
Standby size, technology controlling and process is simple, the characteristics of being more in line with skid-mounted device, is conducive into the use in sled and later stage.
Preferably, LNG skids deacidification system above-mentioned, the absorption loaded in bed among amine liquid combination filter
Material, top are the activated carbon of 70% volume ratio, and the 13X molecular sieves of 30% volume ratio are loaded in lower part.
Preferably, LNG skids deacidification system above-mentioned, further includes having purified gas coalescing filter, purified gas coalescence
Filter is connected by pipeline with the absorption towers MDEA.
The beneficial effects of the utility model are：
1. using high efficiency packing, optimize the size of filler, peak height 3.5mm, 30-45 ° of ripple inclination angle, work surface area is referred to as
750-800m2/m3, optimal surface area is 790 m2/m3, and then reduce equipment size, reduce device height, make into sled ruler
Very little small, convenient transportation.
2. regeneration Tower System is made of the regenerator, regeneration tower bottom reboiler, regeneration overhead condenser of traditional handicraft, equipment
More, technology controlling and process complexity, improvement are the integrated design, and reduce the size of equipment, and technology controlling and process is simple, are more in line with skid dress
The characteristics of setting is conducive into the use in sled and later stage.
3. amine liquid filtration system uses integrated design, reduces number of devices, reduce equipment size, while in amine liquid
Optimize filler configuration in filler, improves amine liquid filter efficiency, improve the effect of amine absorption.
4. whole using steel construction skid, all devices are fixed on steel construction top, and equipment size is more preferably 2.5*3*
10 meters, compact-sized, arrangement is more reasonable.
Description of the drawings
Fig. 1 is the utility model absorption, regenerative system structural schematic diagram；
Fig. 2 is the utility model purification system structural schematic diagram；
Mark meaning in figure：1. raw material gas-liquid separator, 2. purified gas heat exchangers, the absorption towers 3.MDEA, 4.MDEA regeneration
Tower System, 5. rich solution feed preheaters, 6. purified gas coalescing filters, 7. amine liquid storage tanks, 8. antifoaming agent storage tanks, the combination of 9. amine liquid
Filter, 10. lean solution booster pumps, 11. pipelines.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to embodiments, to this
Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain this practicality
It is novel, it is not used to limit the utility model.
Embodiment 1
As depicted in figs. 1 and 2 the utility model proposes LNG skid deacidification systems, including absorption system, regenerative system,
Filtration system and purified gas coalescing filter 6, unstripped gas remove carbon dioxide, MDEA amine absorptions titanium dioxide through absorption system
Carbon recycles between regenerative system and filtration system.
Wherein filtration system includes amine liquid storage tank 7, antifoaming agent storage tank 8, amine liquid combination filter 9 and lean solution booster pump
10, amine liquid storage tank 7 is connected by pipeline 11 with amine liquid combination filter 9；Amine liquid storage tank 7 and amine liquid combination filter 9 pass through
Pipeline 11 is connected with lean solution booster pump 10 respectively, and antifoaming agent storage tank 8 is disposed on amine liquid storage tank 7；Amine liquid combination filter 9
Top and lower part increase filter element, and filling, which absorbs, in 9 intermediate bed of amine liquid combination filter expects；It is being inhaled for MDEA amine liquid
Perishable characteristic during receipts, in the filter between bed middle and upper part load 70% volume ratio activated carbon, lower part load 30% body
The 13X molecular sieves of product ratio, can effectively adsorb the rotten complex impurities in amine liquid, promote adsorption efficiency.
Absorption system includes raw material gas-liquid separator 1, purified gas heat exchanger 2 and the absorption towers MDEA 3, raw material gas-liquid point
It is connected with purified gas heat exchanger 2 by pipeline 11 from device 1, purified gas heat exchanger 2 is connected by pipeline 11 with the absorption towers MDEA 3
It connects；Regenerative system includes MDEA regeneration Tower Systems 4 and rich solution feed preheater 5, and MDEA regenerates Tower System 4 and rich solution charging
Preheater 5 is connected by pipeline 11.Purified gas coalescing filter 6 is connected by pipeline 11 with the absorption towers MDEA 3.
The top of MDEA regeneration Tower Systems 4 is provided with condenser, and the bottom of MDEA regeneration Tower Systems 4 is provided with reboiler.
Overhead vapours is directly entered regenerator after the condenser condensation on 4 top of MDEA regeneration Tower Systems, and MDEA regenerates the tower of Tower System 4
Particular usage valve is set on the reboiler of bottom and ensures that steam rises in reboiler, lime set can enter reboiler, the design contracting by downspout
The small size of equipment, technology controlling and process is simple, the characteristics of being more in line with skid-mounted device, is conducive into the use in sled and later stage.
Using new type high-efficient packing, optimization calculates the characteristic parameter of filler, using peak height 3.5mm, 30-45 ° of ripple inclination angle,
Work surface area is referred to as 750-800m2/m3, the height of the absorption towers MDEA 3 and MDEA regenerators 4 is effectively reduced, from original absorption tower
It is reduced to 8-10 meters of height packed towers with regeneration 25 meters of height of tower.
This technique is absorbed using compound amine aqueous solution as absorbent, using one section, is acid in one section of regeneration flow removing unstripped gas
Gas.Unstripped gas is pushed up by 1 gas phase of unstripped gas gas-liquid separator by purified gas heat exchanger 2 and the absorption towers MDEA 3, gas converting heat
Enter afterwards from 3 lower part of the absorption towers MDEA, passes through the absorption towers MDEA 3 from bottom to top；Compound amine aqueous solution after regeneration is absorbed from MDEA
3 top of tower enters, and passes through the absorption towers MDEA 3, the compound amine aqueous solution and natural gas of reverse flow fill in absorption tower
Tap is touched, the CO in gas2Entered liquid phase by absorption, unabsorbed component is from 3 Base top contact of the absorption towers MDEA, into net
Change gas heat exchanger 2, cool the temperature to≤38 DEG C, into purified gas coalescing filter 6, goes out the entrance of 6 gas of purified gas coalescing filter
Downstream section goes out 6 liquid of purified gas coalescing filter and goes to the absorption towers MDEA 3, enters MDEA regeneration Tower System 4 again with bottom of tower rich solution
It is raw.
Rich solution is to absorb CO2Compound amine aqueous solution, the solution of rich solution and MDEA regeneration Tower System 4 bottom outflow（Lean solution）
Exchange heat in rich solution feed preheater 5, MDEA regeneration Tower System 4 regenerator top flowed to after being warming up to 95~100 DEG C, MDEA again
Steam stripping regeneration is carried out in raw Tower System 4, the lean solution that touches the mark flows out from MDEA regeneration 4 bottom reboiler of Tower System and passes through rich solution
Feed preheater 5 exchanges heat, and the cold sled of devaporation, lean solution is cooled to 35~52 DEG C, into amine liquid storage tank 7, the cloth on amine liquid storage tank 7
It has set antifoaming agent storage tank 8 and has added antifoaming agent.The amine liquid for being added to antifoaming agent and other chemical agents will by lean solution booster pump 10
Amine liquid once squeezes into amine liquid combination filter 9, removes the impurity in amine liquid.Amine liquid storage tank 7 is returned by filtered amine liquid, and
3 top of the absorption towers MDEA is squeezed by lean solution booster pump 10, is reuptaked.
Equipment size is big during this technique is designed according to existing LNG decarbonization devices, and tower height is high, and equipment investment cost is high,
Meanwhile the small feature of desired size in skid mounted equipment, optimization design reduce number of devices, reduce equipment size.
Finally, by PDMS and ASPEN software optimization design schemes, this technique than being reduced in traditional process equipment size,
Transportation cost is reduced, more convenient at sled, cost of investment is low.Original external reboiler and tower reactor are passed through into vessel flange simultaneously
Connection so that process pipe greatlys save, and installation space also further decreases.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not
Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality
Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model
Within enclosing.
Claims (5)
1. a kind of LNG skids deacidification system, including absorption system, regenerative system and filtration system, unstripped gas passes through absorption system
Remove removing carbon dioxide, hydrogen sulfide and organic sulfur, MDEA amine absorptions carbon dioxide and hydrogen sulfide, and in regenerative system and filtering
It is recycled between system,
It is characterized in that：The filtration system includes amine liquid storage tank（7）, antifoaming agent storage tank（8）, amine liquid combination filter（9）
With lean solution booster pump（10）, the amine liquid storage tank（7）Pass through pipeline（11）With the amine liquid combination filter（9）It is connected；
The amine liquid storage tank（7）With amine liquid combination filter（9）Pass through pipeline（11）Respectively with the lean solution booster pump（10）Phase
Connection, in the amine liquid storage tank（7）On be disposed with antifoaming agent storage tank（8）；
The amine liquid combination filter（9）Top and lower part increase filter element, in the amine liquid combination filter（9）Intermediate bed
Filter medium is loaded in layer.
2. LNG skids deacidification system according to claim 1, it is characterised in that：The absorption system includes unstripped gas
Liquid/gas separator（1）, purified gas heat exchanger（2）With the absorption towers MDEA（3）, the raw material gas-liquid separator（1）Pass through pipeline（11）
With the purified gas heat exchanger（2）It is connected, the purified gas heat exchanger（2）Pass through pipeline（11）With the absorption towers MDEA
（3）It is connected；The absorption towers MDEA（3）Height be less than 10 meters.
3. LNG skids deacidification system according to claim 1, it is characterised in that：The regenerative system include MDEA again
Raw Tower System（4）With rich solution feed preheater（5）, the MDEA regeneration Tower System（4）With rich solution feed preheater（5）Pass through pipe
Road（11）It is connected, the MDEA regenerates Tower System（4）Height be less than 10 meters.
4. LNG skids deacidification system according to claim 3, it is characterised in that：The MDEA regenerates Tower System（4）Top
Portion is provided with condenser, and the MDEA regenerates Tower System（4）Bottom be provided with reboiler.
5. LNG skids deacidification system according to claim 2, it is characterised in that：Further include having purified gas coalescing filter
（6）, the purified gas coalescing filter（6）Pass through pipeline（11）With the absorption towers MDEA（3）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111331.6U CN207845588U (en) | 2018-01-23 | 2018-01-23 | A kind of LNG skids deacidification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820111331.6U CN207845588U (en) | 2018-01-23 | 2018-01-23 | A kind of LNG skids deacidification system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207845588U true CN207845588U (en) | 2018-09-11 |
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ID=63416010
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820111331.6U Active CN207845588U (en) | 2018-01-23 | 2018-01-23 | A kind of LNG skids deacidification system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207845588U (en) |
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2018
- 2018-01-23 CN CN201820111331.6U patent/CN207845588U/en active Active
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| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190530 Address after: 716000 Baota Office, Baota District, Yan'an City, Shaanxi Province Zhai Zeliang Shengyuan District, Building 6, Unit 3, Room 401 Patentee after: Yan'an Jia'an Energy Technology Co., Ltd. Address before: 210000 Jinshan Building, Block B, 8 Shanxi Road, Gulou District, Nanjing City, Jiangsu Province, 18E Patentee before: Nanjing insipai Engineering Technology Co., Ltd. |