CN208990274U - Sulfur-bearing TEG rich solution flash distillation stripping separator - Google Patents

Sulfur-bearing TEG rich solution flash distillation stripping separator Download PDF

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Publication number
CN208990274U
CN208990274U CN201821361758.8U CN201821361758U CN208990274U CN 208990274 U CN208990274 U CN 208990274U CN 201821361758 U CN201821361758 U CN 201821361758U CN 208990274 U CN208990274 U CN 208990274U
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China
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stripping
teg
rich solution
sulfur
flash distillation
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CN201821361758.8U
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Chinese (zh)
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李明
李云龙
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  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

The utility model relates to sulfur-bearing TEG rich solutions to flash stripping separator, which includes flash distillation stripping columns, fluid-tight disk, second level stripping section, efficient wire mesh demister, spray equipment, stripping gas distributor.The characteristics of integration of equipments flash tank and two-stage stripper, has the function of flash separation and stripping separation.TEG rich solution hydrogen sulfide content is lower than 0.01% (mol) after being flashed, being stripped.Reduce the corrosion and TEG reboiler thermic load of TEG regenerative system.Content of sulfur dioxide can meet the primary standard in " discharge standard of air pollutants " GB16297 in tail gas after the regeneration gas calcination being discharged at the top of TEG regeneration reboiler.The utility model is used to flash, strips the hydro carbons and hydrogen sulfide for removing and dissolving in high sulfur-bearing TEG rich solution, removal efficiency is high, securely and reliably, equipment volume is small, invests low, it is easy for installation, it does not need consumption instrument wind and electric power, no rotating machinery runs smoothly, it can guarantee high sulfur-bearing TEG natual gas dehydrate unit smooth long term running, economic benefit is obvious.

Description

Sulfur-bearing TEG rich solution flash distillation stripping separator
Technical field
Flash distillation, stripping applied to TEG rich solution during at sulfur-containing gas TEG dehydration, to reduce molten in TEG rich solution Hydro carbons, hydrogen sulfide of solution etc., realizing reduces subsequent TEG reboiler load, mitigates TEG regenerative system burn into reduction regeneration gas sulphur Change hydrogen content reaches national emission standard after making regeneration gas calcination.Especially suitable for high sulfur-containing natural gas TEG dehydration device.
Background technique
Conventional gas, which is handled, widely applies TEG dewatering process in engineering.But when sulfide hydrogen in unstripped gas, TEG is rich Liquid is depressured flash distillation in TEG flash tank can flash off the gases such as most hydro carbons, carbon dioxide being dissolved in TEG rich solution, But hydrogen sulfide can only flash off seldom part, and most hydrogen sulfide are still dissolved in TEG rich solution, the hydrogen sulfide in TEG rich solution Regeneration reboiler finally is discharged from the regeneration reboiler top TEG with regeneration gas, discharges after regeneration gas calcination, is converted after hydrogen sulfide calcination For sulfur dioxide.
Because the discharge amount and concentration of sulfur dioxide need to meet national standard " discharge standard of air pollutants " The requirement of GB16297.Existing TEG dewatering process such as unstripped gas sulfide hydrogen, then hydrogen sulfide discharges after calcination in regeneration gas Sulfur dioxide has been above the requirement of discharge standard of air pollutants substantially.
Requirement due to discharge standard of air pollutants to sulfur dioxide (SO2) emissions is very strict;Another aspect Containing Sulfur The TEG rich solution of hydrogen is very serious to high temperature regeneration system corrosion.Therefore sulfur-containing gas TEG dewatering process is very limited, state The interior few industrial applications of sulfur-containing gas TEG dehydration device.
The prior art generallys use molecular sieve dehydration technique to remove the water in sulfur-containing gas, but molecular sieve dehydration device Opposite TEG dehydration device there are processes it is relative complex, pressure drop is big, investment is high, operating cost is high the disadvantages of.Using molecular sieve dehydration What device greatly improved sulfur-containing gas adopts defeated cost.
Summary of the invention
1, the present invention is integrated with the characteristics of flash separation of TEG rich solution and stripping separation, has flash separation TEG rich solution simultaneously The function of hydrogen sulfide in the gases such as hydro carbons, the carbon dioxide dissolved in removing rich solution and stripping separation rich solution.Through sulfur-bearing flash steam TEG rich solution hydrogen sulfide content can reach lower than 0.01% (mol) after mentioning separator flash distillation, stripping.When TEG rich solution regenerates, from TEG The sulfur dioxide that the regeneration gas being discharged at the top of regeneration reboiler is discharged after calcination can meet national standard, and " atmosphere pollution is comprehensive Discharge standard " highest primary standard is required in GB16297.Especially suitable for high sulfur-containing natural gas TEG dehydration device.Sulfur-bearing dodges Steam mentions separator and is mainly made of 6 parts:
1) stripping columns are flashed
2) fluid-tight disk
3) second level stripping section
4) efficient wire mesh demister
5) spray equipment
6) stripping gas distributor
2, technical solution of the present invention respectively forms partial function and effect
1) stripping columns are flashed
When hydro carbons, the dioxy dissolved in TEG rich solution after being depressured is discharged from the absorption tower TEG lower part for sulfide hydrogen TEG rich solution Changing carbon etc. can largely flash off, but hydrogen sulfide can only flash off seldom part, and most hydrogen sulfide are still dissolved in TEG richness In liquid.After gas-liquid two-phase TEG rich solution after decompression enters sulfur-bearing TEG rich solution flash distillation stripping separator, flashed through spray equipment Stripping columns top spray, TEG rich solution flashed vapour are discharged from flash distillation stripping columns top, remove the micro- of deentrainment through efficient wire mesh demister It is discharged after measuring TEG rich solution from upper side outlet.The stripping that TEG rich solution flows downwardly through flash distillation stripping columns and flows up from lower part Gas carries out counter current contacting stripping, and most of hydrogen sulfide gas is stripped gas carrying and flows up and the flash distillation of TEG rich solution in TEG rich solution Gas converge after from upper side be discharged (being detailed in attached drawing 1).
To improve steam stripping efficiency, equipment size is reduced, flash distillation stripping columns use structured packing or random packing.Filler is in gas Have in liquid mass transport process interphase mass transfer area is big, gas-liquid two-phase contact sufficiently, two-phase laminated flow effect is good, gas-liquid two-phase passes through energy Power is big, unit volume production capacity is high, operating flexibility is big, high-efficient, fluid flow resistance is small, structure is simple, manufacturing cost is low, The advantages that being easily installed, repair and cleaning.
2) fluid-tight disk
The effect of fluid-tight disk is when guaranteeing that TEG level of rich liquid is lower than fluid-tight disk in sulfur-bearing TEG rich solution flash distillation stripping separator Flash stripping columns lower part stripping gas will not from flash distillation stripping columns lower part overflow, make stripping gas still all from flash distillation stripping columns in Upper flowing is simultaneously uniformly distributed, and is come into full contact with TEG rich solution, TE6 rich solution is stripped, to guarantee Srteam Stripping effect.
3) second level stripping section
Most of hydrogen sulfide gas is removed in TEG rich solution after flash distillation stripping columns stripping, to guarantee removal effect, The concentration of hydrogen sulfide dissolved in TEG rich solution is further decreased, second level stripping section is provided with.Second level stripping section regular is filled out using two sections Material or random packing are separated by baffle plate between two sections, and TEG rich solution and stripping natural gas are in two sections of structured packings or random packing Counter current contacting strips, and remaining partial vulcanization hydrogen is stripped gas again and takes in the TEG rich solution after flash distillation stripping columns stripping Band is discharged after flowing up and converging with TE6 rich solution flashed vapour from upper side.TEG rich solution vulcanizes after second level stripping section stripping Hydrogen content can reach lower than 0.01% (mol).Especially suitable for high sulfur-containing natural gas TEG dehydration device.TEG rich solution regenerate when from The sulfur dioxide that the regeneration gas being discharged at the top of TEG regeneration reboiler is discharged after calcination can meet national standard " atmosphere pollution Comprehensive discharge standard " GB16297 require in highest primary standard.
4) efficient wire mesh demister
To reduce, TEG rich solution drop is flashed gas and stripping gas carries out sulfur-bearing TEG rich solution flash distillation stripping separator, reduction The loss of TEG liquid entrainment, guarantees the normal operating of follow-up equipment, flashes in sulfur-bearing TEG rich solution and is provided at the top of stripping separator Efficient wire mesh demister.Relative to other type demisters, efficient wire mesh demister has large specific surface area, light-weight, gap The features such as rate is big, easy to use, foam removal is high-efficient, pressure drop is low, price is low.
5) spray equipment
Since TEG rich solution flow is usually smaller, flash distillation stripping column diameter is also smaller, and spray equipment is distributed using sprinkle nozzle Device.Such distributor have the advantages that structure it is simple, it is easy for installation, be evenly distributed, manufacturing cost is low etc..
6) stripping gas distributor
Since stripping tolerance is relatively small, stripping gas distributor uses porous pipe type gas-phase feed distributor.In distributor pipe The two rows of side openings of upper setting, are divided into multiple flow for gas phase and rise to packing layer.Stripping gas distributor has two, and one is flash distillation stripping Column stripping gas distributor, another is second level stripping section stripping gas distributor.
3, purposes of the invention
The present invention makes the dehydration of sulfur-containing gas that TEG dehydration device substitution can be used suitable for sulfur-bearing TEG dehydration device Sour gas molecular sieve dehydration device.The present invention for sulfur-bearing TEG rich solution flash distillation strip, reduce TEG rich solution in dissolve hydro carbons, Carbon dioxide, hydrogen sulfide etc., to reduce subsequent TEG reboiler load, mitigate TEG regenerative system burn into reduction regeneration gas sulphur Change hydrogen content, reaches national grade one discharge standard after making regeneration gas calcination.
The sulfur-bearing TEG dehydration device that the present invention applies is more with low investment than existing molecular sieve dehydration device technical solution, energy-saving ring Guarantor's (molecular sieve dehydration energy consumption is compared with high), high reliablity, occupied area is small, can guarantee device smooth long term running, especially suitable for High sulfur-containing natural gas TEG dehydration device.Economic benefit is obvious.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is an embodiment of the present invention structural schematic diagram;
1-TEG rich solution entrance in figure;2- spray equipment;3- flashes stripping columns;4- stripping gas entrance;5- flashes stripping columns vapour Mention gas distributor;6- fluid-tight disk;7- second level stripping section;8- second level stripping section stripping gas distributor;9-TEG rich solution outlet;10- vapour Mention gas gas vent;The efficient wire mesh demister of 11-;12- flashed vapour/stripping gas outlet;13- liquidometer;14- gauge port.
Specific embodiment
To keep the purpose of this utility model, technical solution and advantage clearer, below by the technology to the utility model Scheme is described in detail.Obviously, described embodiment is only the utility model a part of the embodiment, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are in the premise for not making creative work Under obtained all other embodiment, belong to the range that the utility model is protected.
Embodiment one
Sulfur-bearing TEG rich solution flash distillation stripping separator, referring to figure 1, which includes TEG rich solution entrance 1;Spray dress Set 2;Flash stripping columns 3;Stripping gas entrance 4;Flash stripping columns stripping gas distributor 5;Fluid-tight disk 6;Second level stripping section 7;Second level Stripping section stripping gas distributor 8;TEG rich solution outlet 9;Stripping gas gas vent 10;Efficient wire mesh demister 11;Flashed vapour/stripping Gas outlet 12;Liquidometer 13;Gauge port 14.
When gas-liquid two-phase sulfide hydrogen TEG rich solution enters sulfur-bearing TEG rich solution flash distillation stripping separator from TEG rich solution entrance 1 Afterwards, it is sprayed through spray equipment 2 on flash distillation 3 top of stripping columns, TEG rich solution flashed vapour is discharged from flash distillation stripping columns top, through efficient Wire mesh demister 11 except after the micro TEG rich solution of deentrainment from 12 discharge of upper side flashed vapour/stripping gas outlet.TEG rich solution Flash distillation stripping columns are flowed downwardly through with the stripping gas flowed up from lower part flash distillation stripping columns stripping gas distributor 5 in flash steam It mentions and carries out counter current contacting stripping in structured packing or random packing in column, most of hydrogen sulfide gas is stripped in TEG rich solution Gas carrying flow up converge with TEG rich solution flashed vapour after from upper side be discharged.
TEG rich solution after stripping flows through fluid-tight disk 6, when TEG level of rich liquid is low in sulfur-bearing TEG rich solution flash distillation stripping separator When fluid-tight disk, the stripping gas for flashing stripping columns lower part will not be overflowed from flash distillation stripping columns lower part, make stripping gas still all from sudden strain of a muscle It steams in stripping columns and flows up and be uniformly distributed, come into full contact with TEG rich solution, TEG rich solution is stripped, to guarantee Srteam Stripping effect.
Most of hydrogen sulfide gas is removed in TEG rich solution after flash distillation stripping columns stripping, to guarantee removal effect, The concentration of hydrogen sulfide dissolved in TEG rich solution is further decreased, TEG rich solution passes through second level stripping section 7.Second level stripping section uses two Section structured packing or random packing is separated by baffle plate between two sections, TEG rich solution with from lower part second level stripping section stripping gas distributor 8 stripping natural gas counter current contacting in second level stripping section strips, remaining in the TEG rich solution after flash distillation stripping columns stripping Hydrogen sulfide gas is stripped gas carrying again and flows up and after stripping gas gas vent 10 and TEG rich solution flashed vapour converge, and leads to Crossing efficient wire mesh demister 11 reduces that TEG rich solution drop is flashed gas and stripping gas carries out sulfur-bearing TEG rich solution flash distillation stripping point From device, the loss of TEG liquid entrainment is reduced, guarantees the normal operating of follow-up equipment.Flashed vapour and stripping gas are flashed from upper side Gas vapor proposes 12 discharge of gas outlet.
Liquidometer 13 is provided with for TEG level of rich liquid in monitoring device;For monitoring device flash distillation, stripping operation press device It is upper to be provided with gauge port 14.
TEG rich solution hydrogen sulfide content can be lower than 0.01% (mol) after second level stripping section stripping.TEG rich solution regenerate when from The sulfur dioxide that the regeneration gas being discharged at the top of TEG regeneration reboiler is discharged after calcination can meet " atmosphere pollution comprehensive discharge Standard " the highest primary standard of GB16297 requirement.Sulfur-bearing TEG rich solution flash distillation stripping separator is natural especially suitable for high sulfur-bearing Gas TEG dehydration device.

Claims (6)

1. sulfur-bearing TEG rich solution flash distillation stripping separator, it is characterised in that: the sulfur-bearing TEG rich solution flash distillation strips separator and includes Flash stripping columns, fluid-tight disk, second level stripping section, efficient wire mesh demister, spray equipment, stripping gas distributor;Each section with TEG rich solution flash distillation stripping Membrane Separator Cylinder for CFB Boiler is support, is fixed by design spacing installation.
2. sulfur-bearing TEG rich solution flash distillation stripping separator according to claim 1, it is characterised in that: be provided with flash distillation stripping Column, second level stripping section, flash distillation stripping columns use structured packing using random packing, second level stripping section, and sulfur-bearing TEG rich solution is at two sections Deviate from the hydrogen sulfide in sulfur-bearing TEG rich solution with stripping gas counter current contacting mass transfer in filler.
3. sulfur-bearing TEG rich solution flash distillation stripping separator according to claim 1, it is characterised in that: the fluid-tight disk installation In flash distillation stripping columns lower part, it is used for fluid-tight stripping gas, overflows stripping gas from flash distillation stripping columns lower part.
4. sulfur-bearing TEG rich solution flash distillation stripping separator according to claim 1, it is characterised in that: the efficient silk screen removes Foam device is installed on sulfur-bearing TEG rich solution flash distillation stripping separator top, for reducing the TEG rich solution carried in flashed vapour and stripping gas Drop reduces the entrainment loss of TEG liquid.
5. sulfur-bearing TEG rich solution flash distillation stripping separator according to claim 1, it is characterised in that: the spray equipment is adopted With sprinkle nozzle distributor.
6. sulfur-bearing TEG rich solution flash distillation stripping separator according to claim 1, it is characterised in that: the stripping gas distribution Device uses porous pipe type gas-phase feed distributor, and gas phase is divided into multiple flow and rises to packing layer;Stripping gas distributor has two, One is flash distillation stripping columns stripping gas distributor, and another is second level stripping section stripping gas distributor.
CN201821361758.8U 2018-08-22 2018-08-22 Sulfur-bearing TEG rich solution flash distillation stripping separator Expired - Fee Related CN208990274U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821361758.8U CN208990274U (en) 2018-08-22 2018-08-22 Sulfur-bearing TEG rich solution flash distillation stripping separator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821361758.8U CN208990274U (en) 2018-08-22 2018-08-22 Sulfur-bearing TEG rich solution flash distillation stripping separator

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111732981A (en) * 2020-06-10 2020-10-02 中国石油天然气集团有限公司 Flash evaporation gas decarburization dehydration method and device based on membrane separation
CN112973194A (en) * 2019-12-17 2021-06-18 中国石油天然气股份有限公司 Device and method for separating gas from liquid under pressure
CN115072965A (en) * 2021-03-10 2022-09-20 中国石油天然气集团有限公司 Flash separation device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112973194A (en) * 2019-12-17 2021-06-18 中国石油天然气股份有限公司 Device and method for separating gas from liquid under pressure
CN111732981A (en) * 2020-06-10 2020-10-02 中国石油天然气集团有限公司 Flash evaporation gas decarburization dehydration method and device based on membrane separation
CN111732981B (en) * 2020-06-10 2021-06-08 中国石油天然气集团有限公司 Flash evaporation gas decarburization dehydration method and device based on membrane separation
CN115072965A (en) * 2021-03-10 2022-09-20 中国石油天然气集团有限公司 Flash separation device

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Granted publication date: 20190618

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