CN106552476A - A kind of method of removing hydrogen sulfide in natural gas - Google Patents
A kind of method of removing hydrogen sulfide in natural gas Download PDFInfo
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- CN106552476A CN106552476A CN201510616920.0A CN201510616920A CN106552476A CN 106552476 A CN106552476 A CN 106552476A CN 201510616920 A CN201510616920 A CN 201510616920A CN 106552476 A CN106552476 A CN 106552476A
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Abstract
The present invention relates to a kind of method of removing hydrogen sulfide in natural gas, comprises the steps：First, using the difference of gas with various solubility in water, with water as absorbing liquid, using one section of hydrophobic membrane by the water of the hydrogen sulfide absorption in sulfur-containing gas to film opposite side, form sulfur-bearing water outlet；Secondly, using two sections of hydrophobic membranes, negative pressure is taken out by the film per-meate side in two sections of hydrophobic membranes, the hydrogen sulfide in sulfur-bearing water outlet is extracted out through two sections of hydrophobic membranes to film per-meate side and collected, and realizes the removing of hydrogen sulfide in natural gas.The method of removing hydrogen sulfide in natural gas of the present invention, adopt water as absorbing liquid, environmental protection, the problems such as equipment corrosion that solvent loss, foaming and degraded and the degrading solvent for causing causes is absorbed in solving natural gas chemistry absorption process sulfur removal technology using hydramine, the floor space of equipment is reduced simultaneously, land used is saved, for skid-mounted type, modularized processing can be realized in the area that place is limited.
Description
Technical field
The present invention relates to natural gas purification field, specifically a kind of removing hydrogen sulfide in natural gas
Method.The method for espespecially removing hydrogen sulfide in natural gas using membrane separation technique.
Background technology
With the development of gas industry, high sulfur Gas Fields continuously emerge, containing big in natural gas
Amount H2S gases, due to H2When S gases run into condensed water, pipeline and container band can be not only given
Carry out general corrosion, and stress-corrosion cracking due to sulphide inclusion can be caused.Additionally, CO2Too high levels
The calorific value of natural gas can be made not reach requirement.Therefore, various countries have to quality of natural gas accordingly
Purification standard.Gas purifying process generally comprises the techniques such as selexol process, decarburization, dehydration.
With regard to manage it is defeated for, health of human body safety is mainly supplied and taken into account according to stable equilibrium and is determined each
Item specific targets, H in general natural gas2S contents should be less than 20mg/m3, CO2Content most
It is less than well 2%～3%.
Selexol process is generally divided into two big class of dry and wet.Dry desulfurization is due to desulfurizing agent one
As can not regenerate, industrially using less.Wet desulphurization treating capacity is big, and operation is continuous, fits
For the process of high sulfur-containing natural gas, the purification of natural gas and refinery gas is now widely used for,
Chemical absorption method, Physical Absorption method and blended absorbent method can be divided into.
For at present, chemical absorption method (referring to alcohol amine absorption process) is that selexol process technique is most normal
Method.The substantially technological process of chemical absorption method is：Containing hydrogen sulfide (H2S original)
Material gas enters absorption tower from bottom, and (lean amine is molten for the absorbing liquid entered at the top of unstripped gas and absorption tower
Liquid) inversely contact, the hydrogen sulfide in unstripped gas is constantly absorbed by lean amine aqueous solution, and lean amine aqueous solution turns
Rich amine solution is changed to, rich amine solution enters desorber solution after heat exchanger with the heat exchange of lean amine aqueous solution
Regeneration is inhaled, the lean amine aqueous solution after desorption is recycled.In the technique, absorbing liquid (the lean amine
Solution) for alkanolamine solution, its desorption temperature is required higher than 105 DEG C, needs to consume a large amount of heat energy.
Additionally, the equipment corrosion that the loss of alcohol amine solvent, foaming and degraded and degrading solvent cause is
The subject matter that the technique presently, there are.Additionally, absorption tower and desorber floor space are larger,
The yards such as the oil gas field being limited especially for place are less suitable for.
Chinese patent 201310368393.7 is related to a kind of natural gas abjection sulfur recovery technology and dress
Put, using hydrophobic membrane absorption method desulfurization, absorbing liquid adopts alkaline salt solution, the sulphur hydrogenation of abjection
After thing is using catalytic solution regeneration elemental sulfur, elementary sulfur is reclaimed into cyclone separator.
Chinese patent 201210164999.4 is related to the money of a kind of selexol process and desulfurization waste liquor
Source Application way, the method adopt liquid NaOH and sodium carbonate for absorbing liquid remove it is natural
Hydrogen sulfide and carbon dioxide in gas, is converted into NaHS and sodium bicarbonate solution, Zhi Houzai
Sodium hydroxide solution is added, vulcanized sodium and sodium carbonate liquor is further converted to, is added liquid
Barium sulphide, reaction extract industrial goods brium carbonate and vulcanized sodium.
Chinese patent CN201010023150.6 is related to a kind of resource utilization height and environment protecting
Good combined process for natural gas desulfurization, the technique first adopt the thick desulfurization of NHD Physical Absorption methods,
Then into the further desulfurization of dry desulfurization unit, the technique refers to a kind of wet desulphurization
With the group technology of dry desulfurization.
Chinese patent CN201010155186.X is related to a kind of method for desulphurizing natural gas in oil and gas fields,
Mainly using the wet desulfuration tower of multiple series connection, each desulfurizing tower adopts natural gas low in and high out side
Formula, desulfurizing agent adopt high in and low out mode, natural gas to pass with the gentle vapour of desulfurizing agent Jing gas-liquid mass transfers
Matter area reinforcing desulfuration, improves desulfuration efficiency.
The content of the invention
For defect present in prior art, it is an object of the invention to provide a kind of removing day
The method of hydrogen sulfide in right gas, using film method for removing hydrogen sulfide in natural gas.
To reach object above, the present invention is adopted the technical scheme that：
A kind of method of removing hydrogen sulfide in natural gas, it is characterised in that comprise the steps：
First, using the difference of gas with various solubility in water, with water as absorbing liquid, adopt
By in the water of the hydrogen sulfide absorption in sulfur-containing gas to film opposite side, formation contains one section of hydrophobic membrane
Sulphur water outlet；
Secondly, using two sections of hydrophobic membranes, negative pressure is taken out by the film per-meate side in two sections of hydrophobic membranes,
Hydrogen sulfide in sulfur-bearing water outlet is extracted out through two sections of hydrophobic membranes to film per-meate side and is collected, and is realized natural
The removing of hydrogen sulfide in gas.
On the basis of above-mentioned technical proposal, following steps are specifically included：
First, under a certain pressure, the natural gas containing hydrogen sulfide is pressed into into one section of doughnut
The shell side of hydrophobic membrane module, with cold water as absorbing liquid so as in hollow fiber hydrophobic membrane component
In tube side and the natural gas reverse flow containing hydrogen sulfide, the hydrogen sulfide in natural gas enters through film
Enter in water absorbing liquid；
Secondly, the absorbing liquid containing hydrogen sulfide is entered in the doughnut fenestra of two sections of hydrophobic membranes
Circulating, negative pressure being taken out in per-meate side, in water, hydrogen sulfide is then pumped to hollow fibre through hydrophobic membrane
Dimension membrane module tube side side, so as to realize the removing of hydrogen sulfide in natural gas.
On the basis of above-mentioned technical proposal, when the water outlet sulfur content through two sections of hydrophobic film process
During≤50mg/L, desulfurization water outlet returns to one section of hydrophobic membrane and recycles as absorbing liquid, two sections
The hydrogen sulfide that hydrophobic membrane is produced is collected and is processed.
On the basis of above-mentioned technical proposal, the membrane material of one section of hydrophobic membrane and two sections of hydrophobic membranes is
Polypropylene, membrane aperture are 0.1～0.2 μm.
On the basis of above-mentioned technical proposal, one section of hydrophobic membrane and two sections of hydrophobic membranes will according to process
Ask and may be designed to multistage form.
On the basis of above-mentioned technical proposal, the admission pressure of one section of hydrophobic membrane is
0.1～0.4MPa.
On the basis of above-mentioned technical proposal, in one section of hydrophobic membrane, the inflow temperature of absorbing liquid is
5～15 DEG C, water inlet flow velocity is 0.5～1.0m/s.
On the basis of above-mentioned technical proposal, the inflow temperature of two sections of hydrophobic membranes is 35～45 DEG C,
Water inlet flow velocity is 0.5～1.0m/s.
On the basis of above-mentioned technical proposal, the negative pressure of the suction side of two sections of hydrophobic membranes adopts dry type
Vavuum pump is formed.
On the basis of above-mentioned technical proposal, suction side operation negative pressure is -0.05～-0.09MPa.
On the basis of above-mentioned technical proposal, the sulfur-bearing water outlet of one section of hydrophobic membrane is being dredged into two sections
Pass through heat exchange before into one section of hydrophobic membrane with the desulfurization water outlet of two sections of hydrophobic membranes before moisture film
Heat exchange is realized in device heat exchange.
On the basis of above-mentioned technical proposal, the sulfur-bearing water outlet of one section of hydrophobic membrane is through exchanger heat
After exchange, if predetermined temperature can not be reached, pipeline heater can be equipped with or heating tape continues to add
Heat.
On the basis of above-mentioned technical proposal, the desulfurization water outlet of two sections of hydrophobic membranes is through exchanger heat
After exchange, if predetermined temperature can not be reached, cooling-water machine can be equipped with and continue cooling.
The method of removing hydrogen sulfide in natural gas of the present invention, adopts water as absorbing liquid, green
Colour circle is protected, and is solved and is absorbed cause molten in natural gas chemistry absorption process sulfur removal technology using hydramine
The problems such as equipment corrosion that agent loss, foaming and degraded and degrading solvent cause, while reducing
The floor space of equipment, saves land used, for skid can be realized in the area that place is limited
Formula, modularized processing.
Description of the drawings
The present invention has drawings described below：
The process chart of Fig. 1 present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in figure 1, the method for removing hydrogen sulfide in natural gas of the present invention, including such as
Lower step：
First, using the difference of gas with various solubility in water, with water as absorbing liquid, adopt
By in the water of the hydrogen sulfide absorption in sulfur-containing gas to film opposite side, formation contains one section of hydrophobic membrane
Sulphur water outlet；
Secondly, using two sections of hydrophobic membranes, negative pressure is taken out by the film per-meate side in two sections of hydrophobic membranes,
Hydrogen sulfide in sulfur-bearing water outlet is extracted out through two sections of hydrophobic membranes to film per-meate side and is collected, and is realized natural
The removing of hydrogen sulfide in gas.
On the basis of above-mentioned technical proposal, following steps are specifically included：
First, under a certain pressure, the natural gas containing hydrogen sulfide (sulfur-containing gas) is pressed
Enter the shell side of one section of hollow fiber hydrophobic membrane component, with cold water as absorbing liquid so as in hollow fibre
Tie up in the tube side (i.e. doughnut fenestra) of hydrophobic membrane module and the natural gas containing hydrogen sulfide is inverse
To flowing, the hydrogen sulfide in natural gas is entered in water absorbing liquid through film；
Secondly, the absorbing liquid containing hydrogen sulfide is entered in the doughnut fenestra of two sections of hydrophobic membranes
Circulating, negative pressure being taken out in per-meate side, in water, hydrogen sulfide is then pumped to hollow fibre through hydrophobic membrane
Dimension membrane module tube side side, so as to realize the removing of hydrogen sulfide in natural gas.
Natural gas through removing hydrogen sulfide concentrates conveying to use.
On the basis of above-mentioned technical proposal, when the water outlet sulfur content through two sections of hydrophobic film process
During≤50mg/L, desulfurization water outlet returns to one section of hydrophobic membrane and recycles as absorbing liquid, two sections
The hydrogen sulfide that hydrophobic membrane is produced is collected and is processed.
On the basis of above-mentioned technical proposal, the membrane material of one section of hydrophobic membrane and two sections of hydrophobic membranes is
Polypropylene, membrane aperture are 0.1～0.2 μm.
On the basis of above-mentioned technical proposal, one section of hydrophobic membrane and two sections of hydrophobic membranes will according to process
Ask and may be designed to multistage form.
On the basis of above-mentioned technical proposal, the admission pressure of one section of hydrophobic membrane is
0.1～0.4MPa.
On the basis of above-mentioned technical proposal, in one section of hydrophobic membrane, the inflow temperature of absorbing liquid is
5～15 DEG C, water inlet flow velocity is 0.5～1.0m/s.
On the basis of above-mentioned technical proposal, the inflow temperature of two sections of hydrophobic membranes is 35～45 DEG C,
Water inlet flow velocity is 0.5～1.0m/s.
On the basis of above-mentioned technical proposal, the negative pressure of the suction side of two sections of hydrophobic membranes adopts dry type
Vavuum pump is formed.
On the basis of above-mentioned technical proposal, suction side operation negative pressure is -0.05～-0.09MPa.
On the basis of above-mentioned technical proposal, the sulfur-bearing water outlet of one section of hydrophobic membrane is being dredged into two sections
Pass through heat exchange before into one section of hydrophobic membrane with the desulfurization water outlet of two sections of hydrophobic membranes before moisture film
Heat exchange is realized in device heat exchange.
On the basis of above-mentioned technical proposal, the sulfur-bearing water outlet of one section of hydrophobic membrane is through exchanger heat
After exchange, if predetermined temperature can not be reached, pipeline heater can be equipped with or heating tape continues to add
Heat.
On the basis of above-mentioned technical proposal, the desulfurization water outlet of two sections of hydrophobic membranes is through exchanger heat
After exchange, if predetermined temperature can not be reached, cooling-water machine can be equipped with and continue cooling.
The present invention with the essential distinction of prior art is：For chemistry is adopted in prior art
Solvent loss, foaming and degraded and solvent that hydrogen sulfide in absorption process removing natural gas is present
It is the problems such as equipment corrosion that degraded causes, of the invention with water as absorbing liquid, using two sections of hydrophobic membranes
Hydrogen sulfide in removing natural gas.
By using the technology, realizing the low energy consumption of the hydrogen sulfide in natural gas, high efficiency and taking off
Remove.Compared to the prior art, technology of the invention solves existing chemical absorbing technology desulfurization and deposits
Equipment is huge, the equipment corrosion that solvent loss, foaming and degraded and degrading solvent cause
The problems such as, technical equipment according to the present invention is simple, operation maintenance easy, adaptive capacity to environment
By force, desulfuration efficiency is high, be capable of achieving skid process, operating cost is reduced.
The removal methods of hydrogen sulfide in natural gas of the present invention, its advantage is：
1st, the removing of hydrogen sulfide in natural gas is carried out using the method for the present invention, need not be using change
Learn absorbing liquid, environmental protection.Solve solvent loss, the foaming caused using chemical absorbing liquid
The problems such as equipment corrosion caused with degraded and degrading solvent.
2nd, method of the present invention Processes and apparatus is simple, efficiently, without the need for chemical agent, automatically
Change ability is strong, and equipment takes up an area less, is particularly suited for place with other external conditions restrictedly
Area.
Natural gas after the inventive method process, hydrogen sulfide content are less than 20mg/m3, can
To meet restriction index of the natural gas to hydrogen sulfide.
It is below some specific embodiments.
Embodiment 1
Hydrogen sulfide volume content in certain natural gas is 10%.
Process step is as follows：Under pressure 0.1MPa, the natural gas containing hydrogen sulfide is pressed into
Aperture is the shell side of 0.2 μm of the hydrophobic membrane module of one section of polypropylene hollow fiber, with temperature is
5 DEG C of cold water is absorbing liquid so as to be doughnut in the tube side of hollow fiber hydrophobic membrane component
In fenestra and the natural gas reverse flow containing hydrogen sulfide, the hydrogen sulfide in natural gas penetrates film
Enter in water absorbing liquid, the chilled water flow velocity in tube side be 0.5m/s, the sulfur-bearing of one section of hydrophobic membrane
Water outlet after exchanger heat exchange is heated to 45 DEG C using pipeline heater, enters into hole
Footpath is flowing in the fenestra of 0.2 μm of two sections of polypropylene hollow fiber hydrophobic membranes, and flow velocity of intaking is
0.5m/s, adopts dry vacuum pumping negative pressure in per-meate side, under operation negative pressure 0.05MPa,
In water, hydrogen sulfide is then pumped to hollow fiber film assembly tube side side through hydrophobic membrane.
Wherein, the desulfurization water outlet of two sections of hydrophobic membranes through exchanger heat exchange after, if can not reach
To predetermined temperature, cooling-water machine can be equipped with and continue to be cooled to the inflow temperature that one section of hydrophobic membrane is limited.
By two sections of hydrophobic membranes, the absorption and desorption that hydrogen sulfide adopts water as absorbing liquid are realized
Journey, it is achieved thereby that the removing of hydrogen sulfide in natural gas.
Wherein, as the water outlet sulfur content≤50mg/L through two sections of hydrophobic film process, desulfurization goes out
Water returns to one section of hydrophobic membrane and recycles as absorbing liquid.
The hydrogen sulfide content in natural gas after above-mentioned steps process is less than 20mg/m3, can
To meet restriction index of the natural gas to hydrogen sulfide.Natural gas through removing hydrogen sulfide concentrates defeated
Use is sent, the hydrogen sulfide produced through two sections of hydrophobic membranes is collected and processed.
Embodiment 2
Hydrogen sulfide volume content in certain natural gas is 12%.
Process step is as follows：Under pressure 0.2MPa, the natural gas containing hydrogen sulfide is pressed into
Aperture is the shell side of 0.15 μm of the hydrophobic membrane module of one section of polypropylene hollow fiber, with temperature is
15 DEG C of cold water is absorbing liquid so as to be doughnut in the tube side of hollow fiber hydrophobic membrane component
In fenestra and the natural gas reverse flow containing hydrogen sulfide, the hydrogen sulfide in natural gas penetrates film
Enter in water absorbing liquid, the chilled water flow velocity in tube side be 1.0m/s, the sulfur-bearing of one section of hydrophobic membrane
Water outlet after exchanger heat exchange is heated to 42 DEG C using pipeline heater, enters into hole
Footpath is flowing in the fenestra of 0.15 μm of two sections of polypropylene hollow fiber hydrophobic membranes, flow velocity of intaking
For 0.7m/s, dry vacuum pumping negative pressure is adopted in per-meate side, in operation negative pressure 0.07MPa
Under, in water, hydrogen sulfide is then pumped to hollow fiber film assembly tube side side through hydrophobic membrane.
Wherein, the desulfurization water outlet of two sections of hydrophobic membranes through exchanger heat exchange after, if can not reach
To predetermined temperature, cooling-water machine can be equipped with and continue to be cooled to the inflow temperature that one section of hydrophobic membrane is limited.
By two sections of hydrophobic membranes, the absorption and desorption that hydrogen sulfide adopts water as absorbing liquid are realized
Journey, it is achieved thereby that the removing of hydrogen sulfide in natural gas.
Wherein, as the water outlet sulfur content≤50mg/L through two sections of hydrophobic film process, desulfurization goes out
Water returns to one section of hydrophobic membrane and recycles as absorbing liquid.
The hydrogen sulfide content in natural gas after above-mentioned steps process is less than 20mg/m3, can
To meet restriction index of the natural gas to hydrogen sulfide.Natural gas through removing hydrogen sulfide concentrates defeated
Use is sent, the hydrogen sulfide produced through two sections of hydrophobic membranes is collected and processed.
Embodiment 3
Hydrogen sulfide volume content in certain natural gas is 15%.
Process step is as follows：Under pressure 0.3MPa, the natural gas containing hydrogen sulfide is pressed into
Aperture is the shell side of 0.1 μm of the hydrophobic membrane module of one section of polypropylene hollow fiber, with temperature is
10 DEG C of cold water is absorbing liquid so as to be doughnut in the tube side of hollow fiber hydrophobic membrane component
In fenestra and the natural gas reverse flow containing hydrogen sulfide, the hydrogen sulfide in natural gas penetrates film
Enter in water absorbing liquid, the chilled water flow velocity in tube side be 0.7m/s, the sulfur-bearing of one section of hydrophobic membrane
Water outlet after exchanger heat exchange is heated to 40 DEG C using pipeline heater, enters into hole
Footpath is flowing in the fenestra of 0.1 μm of two sections of polypropylene hollow fiber hydrophobic membranes, and flow velocity of intaking is
0.8m/s, adopts dry vacuum pumping negative pressure in per-meate side, under operation negative pressure 0.08MPa,
In water, hydrogen sulfide is then pumped to hollow fiber film assembly tube side side through hydrophobic membrane.
Wherein, the desulfurization water outlet of two sections of hydrophobic membranes through exchanger heat exchange after, if can not reach
To predetermined temperature, cooling-water machine can be equipped with and continue to be cooled to the inflow temperature that one section of hydrophobic membrane is limited.
By two sections of hydrophobic membranes, the absorption and desorption that hydrogen sulfide adopts water as absorbing liquid are realized
Journey, it is achieved thereby that the removing of hydrogen sulfide in natural gas.
Wherein, as the water outlet sulfur content≤50mg/L through two sections of hydrophobic film process, desulfurization goes out
Water returns to one section of hydrophobic membrane and recycles as absorbing liquid.
The hydrogen sulfide content in natural gas after above-mentioned steps process is less than 20mg/m3, can
To meet restriction index of the natural gas to hydrogen sulfide.Natural gas through removing hydrogen sulfide concentrates defeated
Use is sent, the hydrogen sulfide produced through two sections of hydrophobic membranes is collected and processed.
Embodiment 4
Hydrogen sulfide volume content in certain natural gas is 18%.
Process step is as follows：Under pressure 0.4MPa, the natural gas containing hydrogen sulfide is pressed into
Aperture is the shell side of 0.1 μm of the hydrophobic membrane module of one section of polypropylene hollow fiber, with temperature is
12 DEG C of cold water is absorbing liquid so as to be doughnut in the tube side of hollow fiber hydrophobic membrane component
In fenestra and the natural gas reverse flow containing hydrogen sulfide, the hydrogen sulfide in natural gas penetrates film
Enter in water absorbing liquid, the chilled water flow velocity in tube side be 0.8m/s, the sulfur-bearing of one section of hydrophobic membrane
Water outlet after exchanger heat exchange is heated to 35 DEG C using pipeline heater, enters into hole
Footpath is flowing in the fenestra of 0.1 μm of two sections of polypropylene hollow fiber hydrophobic membranes, and flow velocity of intaking is
1.0m/s, adopts dry vacuum pumping negative pressure in per-meate side, under operation negative pressure 0.09MPa,
In water, hydrogen sulfide is then pumped to hollow fiber film assembly tube side side through hydrophobic membrane.
Wherein, the desulfurization water outlet of two sections of hydrophobic membranes through exchanger heat exchange after, if can not reach
To predetermined temperature, cooling-water machine can be equipped with and continue to be cooled to the inflow temperature that one section of hydrophobic membrane is limited.
By two sections of hydrophobic membranes, the absorption and desorption that hydrogen sulfide adopts water as absorbing liquid are realized
Journey, it is achieved thereby that the removing of hydrogen sulfide in natural gas.
Wherein, as the water outlet sulfur content≤50mg/L through two sections of hydrophobic film process, desulfurization goes out
Water returns to one section of hydrophobic membrane and recycles as absorbing liquid.
The hydrogen sulfide content in natural gas after above-mentioned steps process is less than 20mg/m3, can
To meet restriction index of the natural gas to hydrogen sulfide.Natural gas through removing hydrogen sulfide concentrates defeated
Use is sent, the hydrogen sulfide produced through two sections of hydrophobic membranes is collected and processed.
The preferable possible embodiments of the present invention are the foregoing is only, not thereby limits to the present invention's
The scope of the claims, therefore the equivalence changes made by every utilization description of the invention and accompanying drawing content,
It is contained in protection scope of the present invention.
The content not being described in detail in this specification belongs to known in professional and technical personnel in the field
Prior art.
Claims (13)
1. a kind of method of removing hydrogen sulfide in natural gas, it is characterised in that including following step
Suddenly：
First, using the difference of gas with various solubility in water, with water as absorbing liquid, adopt
By in the water of the hydrogen sulfide absorption in sulfur-containing gas to film opposite side, formation contains one section of hydrophobic membrane
Sulphur water outlet；
Secondly, using two sections of hydrophobic membranes, negative pressure is taken out by the film per-meate side in two sections of hydrophobic membranes,
Hydrogen sulfide in sulfur-bearing water outlet is extracted out through two sections of hydrophobic membranes to film per-meate side and is collected, and is realized natural
The removing of hydrogen sulfide in gas.
2. the method for removing hydrogen sulfide in natural gas as claimed in claim 1, its feature exist
In specifically including following steps：
First, under a certain pressure, the natural gas containing hydrogen sulfide is pressed into into one section of doughnut
The shell side of hydrophobic membrane module, with cold water as absorbing liquid so as in hollow fiber hydrophobic membrane component
In tube side and the natural gas reverse flow containing hydrogen sulfide, the hydrogen sulfide in natural gas enters through film
Enter in water absorbing liquid；
Secondly, the absorbing liquid containing hydrogen sulfide is entered in the doughnut fenestra of two sections of hydrophobic membranes
Circulating, negative pressure being taken out in per-meate side, in water, hydrogen sulfide is then pumped to hollow fibre through hydrophobic membrane
Dimension membrane module tube side side, so as to realize the removing of hydrogen sulfide in natural gas.
3. the method for removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：As the water outlet sulfur content≤50mg/L through two sections of hydrophobic film process, desulfurization water outlet is returned
Recycle to one section of hydrophobic membrane as absorbing liquid, the hydrogen sulfide of two sections of hydrophobic membrane generations is collected into
Row is processed.
4. the method for removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：The membrane material of one section of hydrophobic membrane and two sections of hydrophobic membranes is polypropylene, and membrane aperture is
0.1～0.2 μm.
5. the method for removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：One section of hydrophobic membrane and two sections of hydrophobic membranes may be designed to multistage form according to processing requirement.
6. the method for removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：The admission pressure of one section of hydrophobic membrane is 0.1～0.4MPa.
7. the method for removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：In one section of hydrophobic membrane, the inflow temperature of absorbing liquid is 5～15 DEG C, and water inlet flow velocity is
0.5～1.0m/s.
8. the method for removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：The inflow temperature of two sections of hydrophobic membranes is 35～45 DEG C, and water inlet flow velocity is 0.5～1.0m/s.
9. the method for removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：The negative pressure of the suction side of two sections of hydrophobic membranes is formed using dry vacuum pump.
10. the method for removing hydrogen sulfide in natural gas as claimed in claim 9, its feature exist
In：Suction side operation negative pressure is -0.05～-0.09MPa.
The method of 11. removing hydrogen sulfide in natural gas as claimed in claim 2, its feature exist
In：The sulfur-bearing water outlet of one section of hydrophobic membrane is de- with two sections of hydrophobic membranes before into two sections of hydrophobic membranes
Sulphur water outlet realized heat exchange by heat exchanger heat exchange before into one section of hydrophobic membrane.
The method of 12. removing hydrogen sulfide in natural gas as claimed in claim 11, its feature
It is：The sulfur-bearing water outlet of one section of hydrophobic membrane through exchanger heat exchange after, if can not reach pre-
Constant temperature degree, can be equipped with pipeline heater or heating tape continues heating.
The method of 13. removing hydrogen sulfide in natural gas as claimed in claim 11, its feature
It is：The desulfurization water outlet of two sections of hydrophobic membranes through exchanger heat exchange after, if can not reach pre-
Constant temperature degree, can be equipped with cooling-water machine and continue cooling.
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| CN103421566A (en) * | 2013-08-21 | 2013-12-04 | 常州大学 | Process and device for recycling sulfur removed from natural gas |
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| CN110997108A (en) * | 2017-08-21 | 2020-04-10 | 埃克森美孚上游研究公司 | Integration of cold solvent and acid gas removal |
| CN110102153A (en) * | 2019-04-25 | 2019-08-09 | 成都同创紫气科技有限公司 | A kind of membrane type deodoriser and its component, system and deodorizing methods |
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