CN107043636A - A kind of device and method of the three-phase regeneration of lighter hydrocarbons desulfurization alkali lye - Google Patents
A kind of device and method of the three-phase regeneration of lighter hydrocarbons desulfurization alkali lye Download PDFInfo
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- CN107043636A CN107043636A CN201710345741.7A CN201710345741A CN107043636A CN 107043636 A CN107043636 A CN 107043636A CN 201710345741 A CN201710345741 A CN 201710345741A CN 107043636 A CN107043636 A CN 107043636A
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- solvent
- alkali
- knockout drum
- alkali lye
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G19/00—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment
- C10G19/08—Recovery of used refining agents
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G19/00—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment
- C10G19/02—Refining hydrocarbon oils in the absence of hydrogen, by alkaline treatment with aqueous alkaline solutions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
- C10G2300/20—Characteristics of the feedstock or the products
- C10G2300/201—Impurities
- C10G2300/202—Heteroatoms content, i.e. S, N, O, P
Abstract
The invention discloses the device and method that a kind of three-phase of lighter hydrocarbons desulfurization alkali lye regenerates, including fiber film contactor and alkali liquid regeneration knockout drum；The internal interlude of fiber film contactor is filled with liquid membrane contactor fiber inner core, and internal top is provided with liquid distributor；The upper end side of fiber film contactor is connected to alkali lye filter, and alkali lye filter is circumscribed with compressed air hose and desulfurization alkali liquor pipe, and the top of fiber film contactor is circumscribed with circulation solvent pipe and low-sulfur solvent pipe for conveying solvent successively；Alkali liquid regeneration knockout drum point gas bag and offgas duct are circumscribed with the top of the tank body of alkali liquid regeneration knockout drum successively；It the advantage is that：Using three-phase mass transfer apparatus of the fiber film contactor as desulfurization alkali lye, the three-phases such as air, alkali lye, solvent are contacted fully in fiber film contactor, three-phase mass-transfer efficiency is high, chemical reaction and physical extraction process are all more thorough, contribute to three-phase quick separating simultaneously, mitigate three alternate mutual entrainments.
Description
Technical field
The present invention relates to the alkali lye and air that the lighter hydrocarbons desulfurization such as a kind of liquefied gas, carbon three, carbon four, light dydrocarbon, light petrol are produced
Oxidation, then the method and device with the progress regenerative response of the de- disulfide of solvent extraction；More particularly to a kind of lighter hydrocarbons desulfurization alkali
The device and method of the three-phase regeneration of liquid.
Background technology
At present, the liquefied gas of oil plant production is mostly using MDEA amine liquid extraction technique removing hydrogen sulfide, sodium hydroxide alkali
It is to meet follow-up deep processing requirement that liquid extraction technique, which removes product such as carbon three, carbon four, light dydrocarbon etc. after mercaptan, liquefied gas qi leel, very
Multiple enterprises use the further deep desulfuration of caustic extraction technology, also Some Enterprises by gasoline be cut into gently, weigh two components, gently
Gasoline uses caustic extraction technology removal of mercaptans, and gasoline, naphtha, condensate can also carry out desulfuration-deodorization using alkali cleaning technology.
Lighter hydrocarbons lye extraction desulfurization process is primarily present following chemical reaction：
RSH + NaOH → NaSR + H2O
H2S + 2NaOH → Na2S+ 2H2O
The NaSR and Na2S of generation are dissolved in alkali lye, with the extension of desulfurization time, NaSR the and Na2S concentration in alkali lye
Reach after certain level, alkali lye desulphurizing ability declines, to ensure that product total sulfur is qualified, it is necessary to regularly replace alkali lye.
To reduce the discharge capacity of lighter hydrocarbons desulfurization spent lye, lighter hydrocarbons lye extraction desulfurization device generally is configured with desulfurization alkali lye oxygen
Change reclamation plant；The alkali liquor oxidized regeneration techniques principle of desulfurization is MEROX technologies, i.e., in sulfonation titanium cyanines cobalt, titanium cyanines cobalt ichthyodin, gather
Under the catalyst existence conditions such as titanium cyanines cobalt, into alkali lye by the air of certain flow, the sulphur in oxygen and alkali lye in air
Sodium alkoxide and vulcanized sodium are reacted, and the process main chemical reactions have：
2NaSR + 1/2 O2 + H2O → 2NaOH + RSSR
2Na2S + 2O2 + H2O → Na2S2O3 + 2NaOH
Na2S2O3 + 2O2 + 2NaOH → 2Na2SO4 + H2O
Alkali liquor oxidized at present all to use oxidizing tower mode substantially to improve alkali liquor oxidized efficiency, alkali liquor oxidized tower is divided into packed tower
And bubble tower；Packed tower is the random packing or structured packing that certain volume is loaded in tower, alkali lye and the filled shearing of air
Into droplet and bubble, so as to increase gas-liquid two-phase contact area；Bubble tower is by air by the air sparger of tower bottom
Tiny bubble is scattered in, bubble is smaller, it is bigger with alkali lye contact area.
The RSSR of alkali liquor oxidized generation（Disulfide）It is difficult thoroughly to divide in above-mentioned alkali liquor oxidized tower for oiliness organic matter
From if not taking effective and removing measure, when the alkali lye is used for lighter hydrocarbons circulation desulfurization, disulfide can be stripped into lighter hydrocarbons production
In product, light hydrocarbon product total sulfur is caused to rise；Therefore, disulfide separation equipment, solvent are designed with again in existing alkali liquid regeneration technique
Anti- extractor.
Certain liquid gas sweetening alkali liquor oxidized regeneration method of house journal 200710071004.9 and device, patent
200710308071.8 a kind of oil-containing alkali liquor separation apparatus and method, and a kind of desulfuration of liquefied gas of patent 2,012 2 0012653.8
The combined system of alcohol, described liquid gas sweetening alkali liquor oxidized regeneration techniques is bubble tower oxidation and liquefaction separation disulfide
Mode；The device and method of a kind of gasoline light fraction removal of mercaptans of the said firm patent 201210276509.x and alkali liquid regeneration, it is described
Liquid gas sweetening alkali liquor oxidized regeneration techniques be bubble tower oxidation and solvent back suction carry removing disulfide mode, it is described
Back suction carries mass transfer apparatus using fiber liquid film reactor.
Certain house journal 200910250279.8 it is a kind of can deeply removing total sulfur liquid hydrocarbon mercaptan removal technique, described liquid
It is that packed tower oxidation and solvent back suction put forward removing disulfide mode, described filler to change desulfurization alcoholic lye oxidation regeneration techniques
Tower enters alkali lye, solvent and air simultaneously, and described filler is the immobilized active carbon bed for having a sulfonation titanium cyanines Co catalysts, described
Three-phase mixture enter knockout drum carry out three phase separation.A kind of group of the demercaptaning for gasoline of the said firm's patent 200710123546.6
Technique is closed, is popularization and application of the above-mentioned patent in gasoline light fraction removal of mercaptans.
Mass transfer apparatus involved by the above-mentioned alkali liquor oxidized regeneration technology of patent is substantially alkali liquor oxidized tower, solvent back suction and carries fibre
Liquid membrane contactor and settlement separation tank are tieed up, technological process is more complicated, and number of devices is more, plant construction investment is higher；In addition, on
State in patent using solvent back suction carry removing disulfide technology, back suction carry inevitably be entrained with rear solvent it is a small amount of
Alkali lye, the alkali lye carried secretly in removing back suction extraction solvent is not referred to, if directly sending to solvent hydrodesulfurization, easily causes hydrogenation plant
Catalyst poisoning, it is likely that cause heavy losses.
The content of the invention
The present invention is in view of the shortcomings of the prior art, provide the characteristics of one kind is using fiber film contactor efficient mass transfer, in fibre
A step completes air catalytic oxidation, solvent back suction and puies forward removing three processes of disulfide and three phase separation in dimension liquid membrane contactor equipment
A kind of lighter hydrocarbons desulfurization alkali lye three-phase regeneration device and method.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals：A kind of lighter hydrocarbons desulfurization alkali lye
Three-phase regeneration device and method, including vertical fiber film contactor and horizontal alkali liquid regeneration knockout drum；It is described
The internal interlude of fiber film contactor is filled with liquid membrane contactor fiber inner core, and internal top is provided with liquid distributor；
The upper end side of the fiber film contactor is connected to alkali lye filter, and the alkali lye filter is circumscribed with the pressure for conveying air
Contracting air hose and the desulfurization alkali liquor pipe that the alkali lye after the lighter hydrocarbons desulfurization of the catalyst such as sulfonation titanium cyanines cobalt is dissolved with for conveying, it is described
The top of fiber film contactor is circumscribed with circulation solvent pipe and low-sulfur solvent pipe for conveying solvent successively, air, alkali lye,
Solvent enters the liquid membrane contactor fiber inner core after being mixed in the liquid distributor；The tank of the alkali liquid regeneration knockout drum
Alkali liquid regeneration knockout drum coalescing-plate is provided with the top of intracoelomic cavity, tank inner chamber bottom is provided with alkali liquid regeneration knockout drum dividing plate, two
Person be arranged in parallel, and the alkali liquid regeneration knockout drum coalescing-plate and the alkali liquid regeneration knockout drum dividing plate are divided into tank body to be separated
Area and separated area；Fiber film contactor is set at the top of the tank body in the area to be separated and fixed with flange；It is described separated
Alkali liquid regeneration knockout drum point gas bag and offgas duct are circumscribed with the top of the tank body in area successively；The tank base in the area to be separated is external
There is alkali liquid regeneration knockout drum point liquid bag, the alkali liquid regeneration knockout drum point liquid bag is circumscribed with regeneration alkali liquor pipe, regeneration alkali lye successively
Pump and regeneration alkali lye go out device pipe；The tank base in the separated area is circumscribed with back suction and puies forward rear solvent pipe, after the back suction is carried
Solvent pipe is connected by solvent circulating pump with the circulation solvent pipe.
Also include the solvent in washing knockout drum, the circulation solvent pipe pass sequentially through sulfur-bearing solvent pipe, venturi mix
After clutch and washing solvent pipe from the top injection washing knockout drum；The tank deck of the washing knockout drum is also circumscribed with fresh
Water pipe and sulfur-bearing solvent go out device pipe；Tank bottom is circumscribed with washing knockout drum point liquid bag；The washing knockout drum point liquid bag is circumscribed with
Circulating water pipe and alkaline waste water pipe, the circulating water pipe are docked with the venturi mixer.
A kind of three-phase regeneration method of lighter hydrocarbons desulfurization alkali lye, its step is as follows：
A. two-phase blend step：The air flowed out from compressed air hose exists with alkali lye after the lighter hydrocarbons desulfurization flowed out from desulfurization alkali liquor pipe
Alkali lye filter is mixed, and alkali lye contains sodium mercaptides, vulcanized sodium and catalyst sulfonation titanium cyanines after lighter hydrocarbons desulfurization.
B. three-phase blend step：Distributed from the solvent of circulation solvent pipe outflow with the air and alkali lye in step a in liquid
Mixed in device.
C. oxidation step：The three-phases such as air, alkali lye, solvent are fully contacted and reacted in fiber film contactor,
Under the catalytic action of sulfonation titanium cyanines cobalt, the oxygen haptoreaction generation hydrogen-oxygen in the sodium mercaptides, vulcanized sodium and air in alkali lye
Change the material such as sodium and disulfide, sodium thiosulfate, sodium sulphate.
D. separating step is precipitated：Precipitation separation is carried out in alkali liquid regeneration knockout drum, alkali and salts substances are dissolved in alkali lye
In, gone out by alkali liquid regeneration knockout drum point liquid packet stream；Disulfide is dissolved in a solvent, and rear solvent pipe outflow is proposed from back suction；Air
In remaining unreacted gas phase in tail gas form from alkali liquid regeneration knockout drum top gas bag discharger.
E. solvent is circulated and supplement step：The recycle solvent for proposing rear solvent pipe outflow from back suction is added by solvent circulating pump
After pressure, fiber film contactor is injected by circulating solvent pipe together with after the mixing of the newborn solvent of low-sulfur solvent pipe.
F. separating step is washed：The recycle solvent for proposing rear solvent pipe outflow from back suction passes through sulfur-bearing solvent pipe, venturi
Blender and washing solvent pipe, which enter in washing knockout drum, washes separation.
G. water circulation step：The water of washing knockout drum passes sequentially through washing knockout drum point liquid bag, circulating water pipe, venturi and mixed
After clutch and washing solvent pipe from the top injection washing knockout drum.
In step a, the vulcanization na concn after lighter hydrocarbons desulfurization in alkali lye is 0.03-0.19%wt, mercaptan na concn 0.43-
1.22%wt, flux of alkaline liquor 20-50Kg/h, 30-65 DEG C of operation temperature；Compressed air require 3-4Nm3/h.
In stepb, industrial naptha circular flow 50-60Kg/h, solvent make-up flow 25-40Kg/h.
The present invention compared with prior art, has the advantages that：Desulfurization alkali lye is used as using fiber film contactor
Three-phase mass transfer apparatus, the three-phase such as air, alkali lye, solvent contacts fully in fiber film contactor, and three-phase mass-transfer efficiency is high,
Chemical reaction and physical extraction process all more thoroughly, while contributing to three-phase quick separating, mitigate three alternate mutual entrainments,
Sodium mercaptides, sodium sulfide content are oxidable to below 100ppm in regeneration alkali lye, and disulfide content can also be removed to below 100ppm,
Back suction extraction solvent neutral and alkali content of material can be controlled in below 1ppm after washing；It is good, anti-with desulfurization alkali liquid regeneration effect
The features such as extraction solvent carries extremely low alkali lye content, low equipment investment, simple technique secretly.
Brief description of the drawings
Fig. 1 is the process chart of the embodiment of the present invention.
Embodiment
1 the present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：Marked in figure as follows：Fiber
It is liquid membrane contactor 1, liquid distributor 2, liquid membrane contactor fiber inner core 3, alkali liquid regeneration knockout drum 4, area to be separated 41, separated
Area 42, alkali liquid regeneration knockout drum point gas bag 5, alkali liquid regeneration knockout drum coalescing-plate 6, alkali liquid regeneration knockout drum dividing plate 7, alkali liquid regeneration
Knockout drum point liquid bag 8, alkali lye filter 9, regeneration lye pump 10, solvent circulating pump 11, venturi mixer 12, washing knockout drum
13rd, washing knockout drum point liquid bag 14, desulfurization alkali liquor pipe 15, regeneration alkali liquor pipe 16, regeneration alkali lye go out device pipe 17, compressed air hose
18th, offgas duct 19, low-sulfur solvent pipe 20, circulation solvent pipe 21, back suction carry rear solvent pipe 22, sulfur-bearing solvent pipe 23, washing solvent
Pipe 24, sulfur-bearing solvent go out device pipe 25, fresh water pipe 26, circulating water pipe 27, alkaline waste water pipe 28.
A kind of device and method of the three-phase regeneration of lighter hydrocarbons desulfurization alkali lye, including the He of vertical fiber film contactor 1
Horizontal alkali liquid regeneration knockout drum 4；The internal interlude of fiber film contactor 1 is filled with liquid membrane contactor fiber inner core 3, body
Interior top is provided with liquid distributor 2；The upper end side of fiber film contactor 1 is connected to outside alkali lye filter 9, alkali lye filter 9
It is connected to the compressed air hose 18 for conveying air and is dissolved with for conveying after the lighter hydrocarbons desulfurization of the catalyst such as sulfonation titanium cyanines cobalt
Alkali lye desulfurization alkali liquor pipe 15, the top of fiber film contactor 1 is circumscribed with the circulation solvent pipe for conveying solvent successively
21 and low-sulfur solvent pipe 20, air, alkali lye, solvent enter liquid membrane contactor fiber inner core 3 after being mixed in liquid distributor 2；
Alkali liquid regeneration knockout drum coalescing-plate 6 is provided with the top of the tank inner chamber of alkali liquid regeneration knockout drum 4, tank inner chamber bottom is provided with alkali
Liquid regeneration knockout drum dividing plate 7, both be arranged in parallel, and alkali liquid regeneration knockout drum coalescing-plate 6 and alkali liquid regeneration knockout drum dividing plate 7 are tank
Body is divided into area 41 to be separated and separated area 42.
Fiber film contactor 1 is set at the top of the tank body in area 41 to be separated and fixed with flange, the tank base in area 41 to be separated
Alkali liquid regeneration knockout drum point liquid bag 8 is circumscribed with, alkali liquid regeneration knockout drum point liquid bag 8 is circumscribed with regeneration alkali liquor pipe 16, regeneration successively
Lye pump 10 and regeneration alkali lye go out device pipe 17.
Alkali liquid regeneration knockout drum point gas bag 5 and offgas duct 19 are circumscribed with the top of the tank body in separated area 42 successively；It is separated
The tank base in area 42 is circumscribed with back suction and puies forward rear solvent pipe 22, and it is molten with circulating by solvent circulating pump 11 that back suction puies forward rear solvent pipe 22
Agent pipe 21 is connected.
The solvent also included in washing knockout drum 13, circulation solvent pipe 21 passes sequentially through sulfur-bearing solvent pipe 23, venturi
After blender 12 and washing solvent pipe 24 from top injection washing knockout drum 13；The tank deck of washing knockout drum 13 is also circumscribed with newly
Fresh water pipe 26 and sulfur-bearing solvent go out device pipe 25；Tank bottom is circumscribed with washing knockout drum point liquid bag 14；Wash knockout drum point liquid bag 14
Circulating water pipe 27 and alkaline waste water pipe 28 are circumscribed with, circulating water pipe 27 is docked with venturi mixer 12.
Described lighter hydrocarbons desulfurization alkali lye includes product such as carbon three, carbon four, carbon after liquefied gas, liquefied gas qi leel in the application
Alkali lye produced by five, and the lighter hydrocarbons depriving hydrogen sulphide such as light petrol and removal of mercaptans, in addition to gasoline, naphtha, chemical industry light oil, condensation
Alkali lye produced by the Light Oil Desulfurizations such as oil and deodorization.
A kind of three-phase regeneration method of lighter hydrocarbons desulfurization alkali lye, including it is following：1）, from compressed air hose 18 flow out air
With flowed out from desulfurization alkali liquor pipe 15 to be dissolved with alkali lye after the lighter hydrocarbons desulfurization of the catalyst such as sulfonation titanium cyanines cobalt thick in alkali lye filter 9
Walk after mixing, then mixed again in liquid distributor 2 with the solvent flowed out from circulation solvent pipe 21, subsequently into fiber liquid film
Contactor 1 is reacted；The three-phases such as air, alkali lye, solvent are fully contacted in fiber film contactor, in sulfonation titanium cyanines cobalt etc.
Under catalyst action, sodium mercaptides, vulcanized sodium in alkali lye are contacted and reactive chemistry reaction with the oxygen in air, generate hydroxide
The material such as sodium and disulfide, sodium thiosulfate, sodium sulphate；Alkali and salts substances are dissolved in alkali lye, and disulfide is dissolved in solvent
In, in air remaining unreacted gas phase in tail gas form from alkali liquid regeneration knockout drum top gas bag discharger, due to pole
Property it is different and there is certain density contrast, solvent is layered with alkali lye and rests on alkali liquid regeneration knockout drum upper strata, overflows across knockout drum
Internal partition flows to solvent phase side, is pressurized by solvent circulating pump, and partial solvent and the low-sulfur solvent of supplement are mixed to form circulation
Solvent, enters fiber film contactor from contactor top, and remainder solvent enters solvent water elution sulphur facility, regenerates alkali lye
Point liquid bag lye export discharge from alkali liquid regeneration knockout drum bottom, lighter hydrocarbons desulfurization, alkali lye are sent to after regenerating lye pump supercharging
Coalescing-plate is favorably improved three phase separating efficiency in regeneration knockout drum, mitigates three alternate mutual entrainments.
2）：Part comes from 1）Back suction carry rear sulfur-bearing solvent and mixed with recirculated water by venturi mixer, into washing
The alkali lye carried secretly in tank, solvent is polar substances, is easily dissolved in water, because polarity is different and there is certain density contrast,
Solvent and alkaline water stratification simultaneously rest on knockout drum upper strata, go solvent hydrogenation plant former from knockout drum top solvent outlet from force feed
Batch can, alkaline water is from point liquid bag water out discharge of knockout drum bottom, and under venturi mixer suction, part water enters
Blender, part water removes alkaline wastewater treatment equipment from force feed, is controlled by flow from the fresh water inlet in water washing tank top simultaneously
Supplement and the fresh water for discharging the flows such as water；Back suction puies forward the alkaline matter content carried secretly in rear sulfur-bearing solvent can be by more quantity of exchanged water
To control.Back suction carries rear sulfur-bearing solvent and the mixing of recirculated water and can also realized by washing pump and other types of blender.
Embodiment 1：Desulfurization alkali lye is adopted to obtain from certain company's liquid hydrocarbon desulfurization device, is tested using the inventive method, it is real
Test result as follows：Liquid hydrocarbon desulfurization alkali lye is constituted：Vulcanize na concn 0.19%wt, mercaptan na concn 1.22%wt, test alkaline stream
Measure 20Kg/h, 50-65 DEG C of operation temperature, sulfonation titanium cyanines Co catalysts content 160-200ppm；Compressed air require 3.5-4Nm3/
h；Industrial naptha circular flow 60Kg/h, solvent make-up flow 40Kg/h；Regeneration alkali lye in sodium sulfide content do not measure, sodium mercaptides
Content 27ppm, disulfide content are back suction extraction solvent neutral and alkali content of material 0.75ppm after 45ppm, washing.
Embodiment 2：Desulfurization alkali lye is adopted to obtain from certain company's liquid hydrocarbon desulfurization device, is tested using the inventive method, it is real
Test result as follows：Liquid hydrocarbon desulfurization alkali lye is constituted：Vulcanize na concn 0.03%wt, mercaptan na concn 0.43%wt, test alkaline stream
Measure 50Kg/h, 30-45 DEG C of operation temperature, sulfonation titanium cyanines Co catalysts content 100-130ppm；Compressed air require 3-3.5Nm3/
h；Industrial naptha circular flow 50Kg/h, solvent make-up flow 25Kg/h；Regeneration alkali lye in sodium sulfide content do not measure, sodium mercaptides
Content 13ppm, disulfide content are back suction extraction solvent neutral and alkali content of material 0.55ppm after 39ppm, washing.
Claims (4)
1. a kind of device and method of the three-phase regeneration of lighter hydrocarbons desulfurization alkali lye, including vertical fiber film contactor（1）With
Horizontal alkali liquid regeneration knockout drum（4）；It is characterized in that：The fiber film contactor（1）Internal interlude be filled with liquid
Membrane contactor fiber inner core（3）, internal top is provided with liquid distributor（2）；The fiber film contactor（1）Upper end side
It is connected to alkali lye filter（9）, the alkali lye filter（9）It is circumscribed with the compressed air hose for conveying air（18）With for defeated
Send the desulfurization alkali liquor pipe for the alkali lye being dissolved with after the lighter hydrocarbons desulfurization of catalyst such as sulfonation titanium cyanines cobalt（15）, the fiber liquid film contact
Device（1）Top be circumscribed with circulation solvent pipe for conveying solvent successively（21）With low-sulfur solvent pipe（20）, air, alkali lye,
Solvent is in the liquid distributor（2）Enter the liquid membrane contactor fiber inner core after middle mixing（3）；The alkali liquid regeneration separation
Tank（4）Tank inner chamber at the top of be provided with alkali liquid regeneration knockout drum coalescing-plate（6）, tank inner chamber bottom is provided with alkali liquid regeneration point
From tank dividing plate（7）, both be arranged in parallel and there are gap, the alkali liquid regeneration knockout drum coalescing-plate in centre（6）With the alkali lye again
Raw knockout drum dividing plate（7）Tank body is divided into area to be separated（41）With separated area（42）；The area to be separated（41）Tank body
Top sets fiber film contactor（1）And fixed with flange, tank base is circumscribed with alkali liquid regeneration knockout drum point liquid bag（8）,
The alkali liquid regeneration knockout drum point liquid bag（8）Regeneration alkali liquor pipe is circumscribed with successively（16）, regeneration lye pump（10）With regeneration alkali lye
Go out device pipe（17）；The separated area（42）Tank body at the top of be circumscribed with alkali liquid regeneration knockout drum point gas bag successively（5）And tail
Tracheae（19）, the separated area（42）Tank base be circumscribed with back suction and put forward rear solvent pipe（22）, the back suction carries rear solvent
Pipe（22）Pass through solvent circulating pump（11）With the circulation solvent pipe（21）It is connected.
2. a kind of device and method of the three-phase regeneration of lighter hydrocarbons desulfurization alkali lye as claimed in claim 1, it is characterised in that：Also wrap
Washing knockout drum is included（13）, the circulation solvent pipe（21）In solvent pass sequentially through sulfur-bearing solvent pipe（23）, venturi mix
Clutch（12）With washing solvent pipe（24）Afterwards the washing knockout drum is injected from top（13）In；The washing knockout drum（13）'s
Tank deck is also circumscribed with fresh water pipe（26）Go out device pipe with sulfur-bearing solvent（25）；Tank bottom is circumscribed with washing knockout drum point liquid bag
（14）, the washing knockout drum point liquid bag（14）It is circumscribed with circulating water pipe（27）With alkaline waste water pipe（28）, the circulating water pipe
（27）With the venturi mixer（12）Docking.
3. a kind of three-phase regeneration method of lighter hydrocarbons desulfurization alkali lye, its step is as follows：
A. two-phase blend step：The air flowed out from compressed air hose exists with alkali lye after the lighter hydrocarbons desulfurization flowed out from desulfurization alkali liquor pipe
Alkali lye filter is mixed, and alkali lye contains sodium mercaptides, vulcanized sodium and catalyst sulfonation titanium cyanines after lighter hydrocarbons desulfurization；
B. three-phase blend step：From the air and alkali lye in the solvent and step a of circulation solvent pipe outflow in liquid distributor
Mixed；
C. oxidation step：The three-phases such as air, alkali lye, solvent are fully contacted and reacted in fiber film contactor, in sulphur
Under the catalytic action for changing titanium cyanines cobalt, the oxygen haptoreaction generation sodium hydroxide in the sodium mercaptides, vulcanized sodium and air in alkali lye
With the material such as disulfide, sodium thiosulfate, sodium sulphate；
D. separating step is precipitated：Precipitation separation is carried out in alkali liquid regeneration knockout drum, alkali and salts substances are dissolved in alkali lye, led to
Alkali liquid regeneration knockout drum point liquid packet stream is crossed to go out；Disulfide is dissolved in a solvent, and rear solvent pipe outflow is proposed from back suction；It is not anti-in air
Remaining gas phase answered is in tail gas form from alkali liquid regeneration knockout drum top gas bag discharger；
E. solvent is circulated and supplement step：The recycle solvent for proposing rear solvent pipe outflow from back suction is pressurizeed by solvent circulating pump
Afterwards, fiber film contactor is injected by circulating solvent pipe together with after the mixing of the newborn solvent of low-sulfur solvent pipe；
F. separating step is washed：The recycle solvent for proposing rear solvent pipe outflow from back suction is mixed by sulfur-bearing solvent pipe, venturi
Device and washing solvent pipe, which enter in washing knockout drum, washes separation；
G. water circulation step：The water of washing knockout drum passes sequentially through washing knockout drum point liquid bag, circulating water pipe, venturi mixer
In the washing knockout drum is injected from top after washing solvent pipe；
A kind of three-phase regeneration method of lighter hydrocarbons desulfurization alkali lye as claimed in claim 3, it is characterised in that：
In step a, the vulcanization na concn after lighter hydrocarbons desulfurization in alkali lye is 0.03-0.19%wt, mercaptan na concn 0.43-1.22%
Wt, flux of alkaline liquor 20-50Kg/h, 30-65 DEG C of operation temperature；Compressed air require 3-4Nm3/h.
4. a kind of three-phase regeneration method of lighter hydrocarbons desulfurization alkali lye as claimed in claim 3, it is characterised in that：In stepb,
Industrial naptha circular flow 50-60Kg/h, solvent make-up flow 25-40Kg/h.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710345741.7A CN107043636B (en) | 2017-05-17 | 2017-05-17 | A kind of regenerated device and method of three-phase of lighter hydrocarbons desulfurization lye |
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| CN201710345741.7A CN107043636B (en) | 2017-05-17 | 2017-05-17 | A kind of regenerated device and method of three-phase of lighter hydrocarbons desulfurization lye |
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| Publication Number | Publication Date |
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| CN107043636A true CN107043636A (en) | 2017-08-15 |
| CN107043636B CN107043636B (en) | 2018-12-07 |
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| US11198107B2 (en) | 2019-09-05 | 2021-12-14 | Visionary Fiber Technologies, Inc. | Conduit contactor and method of using the same |
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| CN115197740A (en) * | 2022-06-28 | 2022-10-18 | 宁波中一石化科技有限公司 | Mercaptan removal alkali liquor oxidation regeneration system and production method |
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