CN107043636B - A kind of regenerated device and method of three-phase of lighter hydrocarbons desulfurization lye - Google Patents
A kind of regenerated device and method of three-phase of lighter hydrocarbons desulfurization lye Download PDFInfo
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- CN107043636B CN107043636B CN201710345741.7A CN201710345741A CN107043636B CN 107043636 B CN107043636 B CN 107043636B CN 201710345741 A CN201710345741 A CN 201710345741A CN 107043636 B CN107043636 B CN 107043636B
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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 a kind of regenerated device and methods of three-phase of lighter hydrocarbons desulfurization lye, 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 lye filter, and lye filter is circumscribed with compressed air hose and desulfurization alkali liquor pipe, and the top of fiber film contactor is successively circumscribed with circulation solvent pipe and low-sulfur solvent pipe for conveying solvent；The top of the tank of alkali liquid regeneration knockout drum is successively circumscribed with alkali liquid regeneration knockout drum and divides gas bag and offgas duct；The advantage is that: the three-phase mass transfer apparatus using fiber film contactor as desulfurization lye, the three-phases such as air, lye, solvent contact sufficiently in fiber film contactor, three-phase mass-transfer efficiency is high, chemical reaction and physical extraction process are all more thoroughly, facilitate three-phase quick separating simultaneously, mitigates three alternate mutual entrainments.
Description
Technical field
The present invention relates to lye and air that the lighter hydrocarbons desulfurization such as a kind of liquefied gas, carbon three, carbon four, light dydrocarbon, light petrol generate
It aoxidizes, then takes off the method and device for carrying out regenerative response of disulfide with solvent extraction；More particularly to a kind of lighter hydrocarbons desulfurization alkali
The regenerated device and method of the three-phase of liquid.
Background technique
Currently, the liquefied gas of oil plant production mostly uses MDEA amine liquid extraction technique to remove hydrogen sulfide, sodium hydroxide alkali
Liquid extraction technique removes mercaptan, and product such as carbon three, carbon four, light dydrocarbon etc. is meets subsequent deep processing requirement after liquefied gas gas point, very
Multiple enterprises use the further deep desulfuration of caustic extraction technology, there are also Some Enterprises by gasoline be cut into it is light, 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 Na of generation2S is dissolved in lye, the NaSR and Na with the extension of desulfurization time, in lye2S is dense
After degree reaches certain level, the decline of lye desulphurizing ability needs to regularly replace lye to guarantee that product total sulfur is qualified.
For the discharge amount for reducing lighter hydrocarbons desulfurization spent lye, lighter hydrocarbons lye extraction desulfurization device generally is configured with desulfurization lye oxygen
Change reclamation plant；The alkali liquor oxidized regeneration techniques principle of desulfurization is MEROX technology, i.e., in sulfonation titanium cyanines cobalt, titanium cyanines cobalt ichthyodin, poly-
The sulphur in oxygen and lye under the catalyst existence conditions such as titanium cyanines cobalt, into lye by the air of certain flow, in air
Sodium alkoxide and vulcanized sodium are reacted, which has:
2NaSR + 1/2 O2 + H2O → 2NaOH + RSSR
2Na2S + 2O2 + H2O → Na2S2O3 + 2NaOH
Na2S2O3 + 2O2 + 2NaOH → 2Na2SO4 + H2O
To improve alkali liquor oxidized efficiency, alkali liquor oxidized at present all to use oxidizing tower mode substantially, alkali liquor oxidized tower, which is divided into, to be filled out
Expect tower and bubble tower；Packed tower is the random packing or structured packing that certain volume is loaded in tower, and lye and air are by filler
Droplet and bubble are cut into, to increase gas-liquid two-phase contact area；The air sparger that bubble tower passes through tower bottom will
Air is scattered in tiny bubble, and bubble is smaller, bigger with lye contact area.
The RSSR(disulfide of alkali liquor oxidized generation) it is oiliness organic matter, it is difficult thoroughly to divide in above-mentioned alkali liquor oxidized tower
From if not taking effective and removing measure, when which 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, design has disulfide separation equipment, solvent again in existing alkali liquid regeneration technique
Anti- extractor.
Certain 200710071004.9 liquid gas sweetening alkali liquor oxidized regeneration method of house journal and device, patent
200710308071.8 a kind of oil-containing alkali liquor separation apparatus and a kind of desulfuration of liquefied gas of method and patent 2,012 2 0012653.8
The combined system of alcohol, the liquid gas sweetening alkali liquor oxidized regeneration techniques are 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 mention removing disulfide mode, it is described
Back suction mentions mass transfer apparatus using fiber liquid film reactor.
Certain 200910250279.8 one kind of house journal can deeply removing total sulfur liquid hydrocarbon mercaptan removal technique, the liquid
Changing desulfurization alcoholic lye oxidation regeneration techniques is that packed tower oxidation and solvent back suction mention removing disulfide mode, the filler
Tower enters lye, solvent and air simultaneously, and the filler is the immobilized active carbon bed for having 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 mentions fibre
Liquid membrane contactor and settlement separation tank are tieed up, process flow is more complex, and number of devices is more, plant construction high investment；On in addition,
State in patent using solvent back suction mention removing disulfide technology, back suction mention inevitably be entrained in rear solvent it is a small amount of
Lye does not refer to that the lye carried secretly in removing back suction extraction solvent easily causes hydrogenation plant if directly sending to solvent hydrodesulfurization
Catalyst poisoning, it is likely that cause heavy losses.
Summary of the invention
The present invention is in view of the shortcomings of the prior art, provide a kind of the characteristics of utilizing fiber film contactor efficient mass transfer, in fibre
A step completes air catalytic oxidation in dimension liquid membrane contactor equipment, solvent back suction proposes removing three processes of disulfide and three phase separation
A kind of lighter hydrocarbons desulfurization lye the regenerated device and method of three-phase.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals: a kind of lighter hydrocarbons desulfurization lye
The regenerated device of three-phase include vertical fiber film contactor and horizontal alkali liquid regeneration knockout drum；The fiber liquid film
The internal interlude of contactor is filled with liquid membrane contactor fiber inner core, and internal top is provided with liquid distributor；The fiber
The upper end side of liquid membrane contactor is connected to lye filter, and the lye filter is circumscribed with the compressed air hose for conveying air
With for convey be dissolved with sulfonation titanium cyanines cobalt lighter hydrocarbons desulfurization after lye desulfurization alkali liquor pipe, the fiber film contactor
Top is successively circumscribed with circulation solvent pipe and low-sulfur solvent pipe for conveying solvent, and air, lye, solvent are in the liquid point
Enter the liquid membrane contactor fiber inner core after mixing in orchestration；It is provided at the top of the tank inner chamber of the alkali liquid regeneration knockout drum
Alkali liquid regeneration knockout drum coalescing-plate, tank inner chamber bottom are provided with alkali liquid regeneration knockout drum partition, and the two is arranged in parallel, the alkali
Liquid regenerates knockout drum coalescing-plate and the alkali liquid regeneration knockout drum partition and tank body is divided into area to be separated and separated area；It is described
The top of the tank setting fiber film contactor in area to be separated is simultaneously fixed with flange；The top of the tank in the separated area is successively outer
It is connected to alkali liquid regeneration knockout drum and divides gas bag and offgas duct；The tank base in the area to be separated is circumscribed with alkali liquid regeneration knockout drum point
Liquid packet, the alkali liquid regeneration knockout drum liquid separation packet are successively circumscribed with regeneration alkali liquor pipe, regeneration lye pump and regeneration lye and go out device
Pipe；The tank base in the separated area is circumscribed with back suction and proposes rear solvent pipe, and the back suction proposes rear solvent pipe and recycled by solvent
Pump is connected with the circulation solvent pipe.
It further include having washing separation tank, it is mixed that the solvent in the circulation solvent pipe passes sequentially through sulfur-bearing solvent pipe, venturi
It is injected in the washing separation tank after clutch and washing solvent pipe from top；The tank deck of the washing separation tank is also circumscribed with fresh
Water pipe and sulfur-bearing solvent go out device pipe；Tank bottom is circumscribed with washing separation tank liquid separation packet；The washing separation tank liquid separation packet 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 lye, its step are as follows:
A. two-phase mixing step: the air flowed out from compressed air hose with from alkali after the lighter hydrocarbons desulfurization that desulfurization alkali liquor pipe flows out
Liquid is mixed in lye filter, and lye contains sodium mercaptides, vulcanized sodium and catalyst sulfonation titanium cyanines after lighter hydrocarbons desulfurization.
B. three-phase mixing step: from the solvent and step a that circulation solvent pipe flows out air and lye distribute in liquid
It is mixed in device.
C. oxidation step: air, lye, solvent come into full contact with and react in fiber film contactor, in sulfonation
Under the catalytic action of titanium cyanines cobalt, sodium mercaptides, vulcanized sodium in lye and the oxygen haptoreaction in air generate sodium hydroxide and
Disulfide, sodium thiosulfate and sodium sulphate.
D. precipitation and separation step: precipitation and separation is carried out in alkali liquid regeneration knockout drum, alkali and salts substances are dissolved in lye
In, gone out by alkali liquid regeneration knockout drum liquid separation packet stream；Disulfide dissolves in a solvent, proposes rear solvent pipe outflow from back suction；Air
In remaining unreacted gas phase in the form of tail gas from alkali liquid regeneration knockout drum top part gas bag discharger.
E. solvent recycles and supplements step: mentioning the recycle solvent that rear solvent pipe flows out from back suction and is added by solvent circulating pump
After pressure, fiber film contactor is injected by circulation solvent pipe together after mixing with the newborn solvent from low-sulfur solvent pipe.
F. washing separation step: the recycle solvent that rear solvent pipe flows out is mentioned from back suction and passes through sulfur-bearing solvent pipe, venturi
Mixer and washing solvent pipe enter washing separation in washing separation tank.
G. water circulation step: it is mixed that the water of washing separation tank passes sequentially through washing separation tank liquid separation packet, circulating water pipe, venturi
It is injected in the washing separation tank after clutch and washing solvent pipe from top.
In step a, the vulcanization na concn after lighter hydrocarbons desulfurization in 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 utility model compared with prior art, has the following beneficial effects: using fiber film contactor as desulfurization
The three-phase mass transfer apparatus of lye, the three-phases such as air, lye, solvent contact sufficiently in fiber film contactor, three-phase mass transfer effect
Rate is high, and chemical reaction and physical extraction process all more thoroughly, while facilitating three-phase quick separating, and it is alternate mutual to mitigate three
It is oxidable to 100ppm hereinafter, disulfide content can also be removed to 100ppm to regenerate sodium mercaptides, sodium sulfide content in lye for entrainment
Hereinafter, back suction extraction solvent neutral and alkali content of material can be controlled in 1ppm or less after washing；With desulfurization alkali liquid regeneration effect
Good, back suction extraction solvent carries the features such as extremely low lye content, low equipment investment, simple process secretly.
Detailed description of the invention
Fig. 1 is the process flow chart of the embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing 1 and specific embodiment the utility model is described in further detail: in figure mark it is as follows:
Fiber film contactor 1, liquid distributor 2, liquid membrane contactor fiber inner core 3, alkali liquid regeneration knockout drum 4, area to be separated 41,
Gas bag 5, alkali liquid regeneration knockout drum coalescing-plate 6, alkali liquid regeneration knockout drum partition 7, lye are divided in Disengagement zone 42, alkali liquid regeneration knockout drum
Regenerate knockout drum liquid separation packet 8, lye filter 9, regeneration lye pump 10, solvent circulating pump 11, venturi mixer 12, washing point
Go out device pipe 17, compression sky from tank 13, washing separation tank liquid separation packet 14, desulfurization alkali liquor pipe 15, regeneration alkali liquor pipe 16, regeneration lye
Tracheae 18, offgas duct 19, low-sulfur solvent pipe 20, circulation solvent pipe 21, back suction propose 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 regenerated device of three-phase of lighter hydrocarbons desulfurization lye, including vertical fiber film contactor 1 and 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, internal top
It is provided with liquid distributor 2；The upper end side of fiber film contactor 1 is connected to lye filter 9, and lye filter 9 is external useful
In the compressed air hose 18 of conveying air and for conveying the desulfurization alkali for being dissolved with the lye after the lighter hydrocarbons desulfurization of sulfonation titanium cyanines cobalt
Liquid pipe 15, the top of fiber film contactor 1 are successively circumscribed with circulation solvent pipe 21 and low-sulfur solvent pipe for conveying solvent
20, air, lye, solvent enter liquid membrane contactor fiber inner core 3 after mixing in liquid distributor 2；Alkali liquid regeneration knockout drum 4
Tank inner chamber at the top of be provided with alkali liquid regeneration knockout drum coalescing-plate 6, tank inner chamber bottom be provided with alkali liquid regeneration knockout drum every
Plate 7, the two is arranged in parallel, and alkali liquid regeneration knockout drum coalescing-plate 6 and alkali liquid regeneration knockout drum partition 7 are divided into tank body to be separated
Area 41 and separated area 42.
The top of the tank setting fiber film contactor 1 in area 41 to be separated is simultaneously fixed, the tank body in area 41 to be separated with flange
Bottom is circumscribed with alkali liquid regeneration knockout drum liquid separation packet 8, alkali liquid regeneration knockout drum liquid separation packet 8 be successively circumscribed with regeneration alkali liquor pipe 16,
Regeneration lye pump 10 and regeneration lye go out device pipe 17.
The top of the tank in separated area 42 is successively circumscribed with alkali liquid regeneration knockout drum and divides gas bag 5 and offgas duct 19；It is separated
The tank base in area 42 is circumscribed with back suction and proposes rear solvent pipe 22, and it is molten by solvent circulating pump 11 and circulation that back suction proposes rear solvent pipe 22
Agent pipe 21 is connected.
It further include having washing separation tank 13, the solvent recycled in solvent pipe 21 passes sequentially through sulfur-bearing solvent pipe 23, venturi
After mixer 12 and washing solvent pipe 24 from top injection washing separation tank 13；The tank deck of washing separation tank 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 separation tank liquid separation packet 14；Washing separation tank liquid separation packet 14
It is circumscribed with circulating water pipe 27 and alkaline waste water pipe 28, circulating water pipe 27 is docked with venturi mixer 12.
Described lighter hydrocarbons desulfurization lye includes liquefied gas in the application, product such as carbon three, carbon four, carbon after liquefied gas gas point
Lye caused by the lighter hydrocarbons such as five and light petrol depriving hydrogen sulphide and removal of mercaptans further includes gasoline, naphtha, chemical industry light oil, condensation
Lye produced by the Light Oil Desulfurizations such as oil and deodorization.
A kind of three-phase regeneration method of lighter hydrocarbons desulfurization lye, include the following: 1) air, from compressed air hose 18 flowed out
With flow out from desulfurization alkali liquor pipe 15 the lighter hydrocarbons desulfurization dissolved with catalyst such as sulfonation titanium cyanines cobalts after lye it is thick in lye filter 9
It walks after mixing, then is 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；Air, lye and solvent come into full contact in fiber film contactor, are catalyzed in sulfonation titanium cyanines cobalt etc.
Agent effect under, sodium mercaptides, vulcanized sodium in lye contact with the oxygen in air and reactive chemistry reaction, generate sodium hydroxide with
Disulfide, sodium thiosulfate and sodium sulphate；Alkali and salts substances are dissolved in lye, and disulfide dissolves in a solvent, in air
Remaining unreacted gas phase, from alkali liquid regeneration knockout drum top part gas bag discharger, due to polarity difference and is deposited in the form of tail gas
In certain density contrast, solvent and lye are layered and rest on alkali liquid regeneration knockout drum upper layer, overflow across knockout drum internal partition and flow to
Solvent phase side, is pressurized by solvent circulating pump, and the low-sulfur solvent of partial solvent and supplement is mixed to form circulation solvent, from contact
Enter fiber film contactor at the top of device, rest part solvent enters solvent water elution sulphur facility, regenerates lye from alkali liquid regeneration
The liquid separation packet lye export of knockout drum bottom is discharged, and sends to lighter hydrocarbons desulfurization, alkali liquid regeneration knockout drum after regeneration lye pump pressurization
Interior coalescing-plate helps to improve three phase separating efficiency, mitigates three alternate mutual entrainments.
2): partly mentioning rear sulfur-bearing solvent from back suction 1) and mixed with recirculated water by venturi mixer, into washing
Tank, the lye carried secretly in solvent are polar substances, are easily dissolved in water, since polarity is different and there are certain density contrast,
Solvent and alkaline water stratification simultaneously rest on knockout drum upper layer, go solvent hydrogenation plant former from knockout drum top solvent outlet from force feed
Batch can, alkaline water is discharged from the liquid separation packet water out of knockout drum bottom, and under venturi mixer suction, part water enters
Mixer, part water remove alkaline wastewater treatment equipment from force feed, and by flow control, fresh water inlet is simultaneously at the top of the water washing tank
The fresh water of the flows such as supplement and discharge water；Back suction proposes the alkaline matter content carried secretly in rear sulfur-bearing solvent can be by more quantity of exchanged water
To control.Back suction mentions rear sulfur-bearing solvent and the mixing of recirculated water and can also be realized by washing pump and other types of mixer.
Embodiment 1: from certain company, liquid hydrocarbon desulfurization device adopts to obtain desulfurization lye, is tested using the method for the present invention, real
It is as follows to test result: liquid hydrocarbon desulfurization lye composition: vulcanization 0.19 wt % of na concn, 1.22 wt % of mercaptan na concn test alkali
Flow quantity 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 lye in sodium sulfide content do not measure,
Mercaptan sodium content 27ppm, disulfide content are back suction extraction solvent neutral and alkali content of material 0.75ppm after 45ppm, washing.
Embodiment 2: from certain company, liquid hydrocarbon desulfurization device adopts to obtain desulfurization lye, is tested using the method for the present invention, real
It is as follows to test result: liquid hydrocarbon desulfurization lye composition: vulcanization 0.03 wt % of na concn, 0.43 wt % of mercaptan na concn test alkali
Flow quantity 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；Sodium sulfide content in lye is regenerated to survey not
Out, mercaptan sodium content 13ppm, disulfide content are back suction extraction solvent neutral and alkali content of material 0.55ppm after 39ppm, washing.
Claims (5)
1. a kind of regenerated device of three-phase of lighter hydrocarbons desulfurization lye, including vertical fiber film contactor (1) and horizontal
Alkali liquid regeneration knockout drum (4)；It is characterized by: the internal interlude of the fiber film contactor (1) is contacted filled with liquid film
Device fiber inner core (3), internal top are provided with liquid distributor (2)；The upper end side of the fiber film contactor (1) is connected to alkali
Liquid filter (9), the lye filter (9) are circumscribed with the compressed air hose (18) for conveying air and dissolve for conveying
The desulfurization alkali liquor pipe (15) of lye after having the lighter hydrocarbons desulfurization of sulfonation titanium cyanines cobalt, the top of the fiber film contactor (1) according to
The secondary circulation solvent pipe (21) and low-sulfur solvent pipe (20) being circumscribed with for conveying solvent, air, lye, solvent are in the liquid
Enter the liquid membrane contactor fiber inner core (3) in distributor (2) after mixing；In the tank body of the alkali liquid regeneration knockout drum (4)
Top of chamber is provided with alkali liquid regeneration knockout drum coalescing-plate (6), and tank inner chamber bottom is provided with alkali liquid regeneration knockout drum partition (7),
The two is arranged in parallel and there are gap, the alkali liquid regeneration knockout drum coalescing-plate (6) and the alkali liquid regeneration knockout drum partition in centre
(7) tank body is divided into area to be separated (41) and separated area (42)；Fiber is arranged in the top of the tank of the area to be separated (41)
Liquid membrane contactor (1) is simultaneously fixed with flange, and tank base is circumscribed with alkali liquid regeneration knockout drum liquid separation packet (8), the alkali liquid regeneration
Knockout drum liquid separation packet (8) is successively circumscribed with regeneration alkali liquor pipe (16), regeneration lye pump (10) and regeneration lye and goes out device pipe (17)；
The top of the tank of the separated area (42) is successively circumscribed with alkali liquid regeneration knockout drum and divides gas bag (5) and offgas duct (19), described
The tank base of separated area (42) is circumscribed with back suction and mentions rear solvent pipe (22), and the back suction proposes rear solvent pipe (22) and passes through solvent
Circulating pump (11) is connected with the circulation solvent pipe (21).
2. a kind of regenerated device of three-phase of lighter hydrocarbons desulfurization lye as described in claim 1, it is characterised in that: further include having water
It washes knockout drum (13), the solvent in circulation solvent pipe (21) passes sequentially through sulfur-bearing solvent pipe (23), venturi mixer
(12) and after washing solvent pipe (24) it is injected in the washing separation tank (13) from top；The tank deck of the washing separation tank (13)
It is also circumscribed with fresh water pipe (26) and sulfur-bearing solvent goes out device pipe (25)；Tank bottom is circumscribed with washing separation tank liquid separation packet (14), institute
It states washing separation tank liquid separation packet (14) and is circumscribed with circulating water pipe (27) and alkaline waste water pipe (28), the circulating water pipe (27) and institute
State venturi mixer (12) docking.
3. a kind of three-phase regeneration method of lighter hydrocarbons desulfurization lye, its step are as follows:
A. two-phase mixing step: the air flowed out from compressed air hose exists with from lye after the lighter hydrocarbons desulfurization that desulfurization alkali liquor pipe flows out
The mixing of lye filter, lye contains sodium mercaptides, vulcanized sodium and catalyst sulfonation titanium cyanines after lighter hydrocarbons desulfurization；
B. three-phase mixing step: from the solvent and step a that circulation solvent pipe flows out air and lye in liquid distributor
It is mixed；
C. oxidation step: air, lye and solvent come into full contact with and react in fiber film contactor, in sulfonation titanium
Under the catalytic action of cyanines cobalt, sodium mercaptides, vulcanized sodium in lye and the oxygen haptoreaction in air generate sodium hydroxide, two sulphur
Ether, sodium thiosulfate and sodium sulphate；
D. precipitation and separation step: precipitation and separation is carried out in alkali liquid regeneration knockout drum, alkali and salts substances are dissolved in lye, are led to
Alkali liquid regeneration knockout drum liquid separation packet stream is crossed to go out；Disulfide dissolves in a solvent, proposes rear solvent pipe outflow from back suction；It is not anti-in air
Remaining gas phase answered is in the form of tail gas from alkali liquid regeneration knockout drum top part gas bag discharger；
E. solvent recycles and supplements step: mentioning the recycle solvent that rear solvent pipe flows out from back suction and passes through solvent circulating pump pressurization
Afterwards, fiber film contactor is injected by circulation solvent pipe together after mixing with the newborn solvent from low-sulfur solvent pipe；
F. washing separation step: the recycle solvent that rear solvent pipe flows out is mentioned from back suction and is mixed by sulfur-bearing solvent pipe, venturi
Device and washing solvent pipe enter washing separation in washing separation tank；
G. water circulation step: the water of washing separation tank passes sequentially through washing separation tank liquid separation packet, circulating water pipe, venturi mixer
It is injected in the washing separation tank with after washing solvent pipe from top.
4. a kind of three-phase regeneration method of lighter hydrocarbons desulfurization lye as claimed in claim 3, it is characterised in that:
In step a, the vulcanization na concn after lighter hydrocarbons desulfurization in 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。
5. a kind of three-phase regeneration method of lighter hydrocarbons desulfurization lye as claimed in claim 4, 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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| 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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| CN108704480B (en) | 2018-04-13 | 2020-11-06 | 中国石油天然气股份有限公司 | Regeneration method of liquefied gas desulfurized alcohol alkali liquor |
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| JPH09217069A (en) * | 1996-02-09 | 1997-08-19 | Japan Energy Corp | Removal of thermally stable amine salt-forming substance |
| CN102757809B (en) * | 2012-08-03 | 2015-03-18 | 宁波中一石化科技有限公司 | Mercaptan removal and lye regeneration device and method for gasoline light fractions |
| CN104694151B (en) * | 2013-12-06 | 2016-08-17 | 中国石油天然气股份有限公司 | A kind of oxidized regenerating method containing mercaptides alkali liquor |
| CN105885937B (en) * | 2016-06-21 | 2018-03-02 | 宁波章甫能源科技有限公司 | A kind of method of liquid hydrocarbon fine de-sulfur |
| CN205676427U (en) * | 2016-06-21 | 2016-11-09 | 宁波章甫能源科技有限公司 | A kind of device of condensate fiber liquid film deodorize |
| CN207143179U (en) * | 2017-05-17 | 2018-03-27 | 宁波传致石化科技有限公司 | A kind of device of the three-phase regeneration of lighter hydrocarbons desulfurization alkali lye |
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