CN108949230A - A kind of desulfuration of liquefied gas system and method - Google Patents
A kind of desulfuration of liquefied gas system and method Download PDFInfo
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- CN108949230A CN108949230A CN201810557580.2A CN201810557580A CN108949230A CN 108949230 A CN108949230 A CN 108949230A CN 201810557580 A CN201810557580 A CN 201810557580A CN 108949230 A CN108949230 A CN 108949230A
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- mtbe
- prime
- tower
- liquefied gas
- rear class
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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
- C10G70/00—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- 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
- C10G70/00—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00
- C10G70/04—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00 by physical processes
- C10G70/06—Working-up undefined normally gaseous mixtures obtained by processes covered by groups C10G9/00, C10G11/00, C10G15/00, C10G47/00, C10G51/00 by physical processes by gas-liquid contact
Abstract
The invention discloses a kind of desulfuration of liquefied gas system and methods, are related to chemical production technical field, which includes the online mixer for being sequentially connected setting, prime separator, intermediate separator and rear class separator；Liquefied gas each leads into the online mixer with MTBE and is mixed, it is transferred to the sulphur ingredient in liquefied gas in the MTBE, mixed mixture enters the prime separator and is separated, and MTBE is then passed into intermediate separator and de- handle again, it separates the heavy constituent for being located at tower bottom containing high-sulfur and intermittently sends out the intermediate separator, rear class separator is then passed into positioned at the MTBE of tower top and carries out light dydrocarbon separation, and MTBE after isolating light dydrocarbon mixes as the charging of online mixer with the liquefied gas to be recycled.Process is relatively easy, easy to operate, and desulfurization effect is obvious, while obtaining subsidiary light dydrocarbon component and can be used as the raw materials for production of other products, improves benefit.
Description
Technical field
The present invention relates to chemical production technical field more particularly to a kind of desulfuration of liquefied gas system and methods.
Background technique
With the development of petro chemical industry, liquefied petroleum gas has been got over as a kind of chemical industry base stock and New-type fuel
To be more valued by people.Make fuel with liquefied petroleum gas, due to its calorific value height, smoke dust, without breeze, the side of operating with
Just, widely enter people's lives field.In terms of Chemical Manufacture, liquefied petroleum gas is that oil plant is carrying out crude oil catalysis
The main ingredient of obtained byproduct when cracking is with thermal cracking, catalytically cracked gas is following (%): ethane and ethylene 2~3, propane 10
~15, propylene 30~35, butane 42~46, butylene 5~6, the above hydro carbons 2~3 containing 5 carbon atoms, for produce synthetic plastic,
Synthetic rubber, synthetic fibers and production medicine, explosive, the products such as dyestuff.
Liquefied petroleum gas is one of the product in petroleum refining process, and is further processed into the important original of other products
Material.Refined material liquefied petroleum gas is mainly with the liquefied gas after alcohol amine removal of H2S, the liquid come from hydramine method desulfurization unit
Changing gas main component is C3, C4 component, contains a small amount of hydrogen sulfide and organic sulfur (mainly mercaptan, carbonyl sulfur, carbon disulfide).Mesh
Catalyst needed for preceding liquefied gas conversion in the market mainly has sulfonated phthalocyanine cobalt and/or a poly- phthalocyanine cobalt catalyst, but both
Catalyst only has preferable transformation to sodium mercaptides, has a single function, and needs another fresh air and/or activator, complex process,
It is at high cost.
Summary of the invention
In order to overcome the shortcomings of Related product in the prior art, the present invention proposes a kind of desulfuration of liquefied gas system and method,
Solve the problems, such as current desulfuration of liquefied gas complex process, at high cost.
The present invention provides a kind of desulfuration of liquefied gas systems, comprising: is sequentially connected online mixer, the prime separation of setting
Device, intermediate separator and rear class separator；Liquefied gas each leads into the online mixer with MTBE and carries out
Mixing, is transferred to the sulphur ingredient in liquefied gas in the MTBE, mixed mixture enters the prime separator
It is separated, by the liquefaction pneumatic transmission after separation to gas fractionation unit, and MTBE is then passed into intermediate separator and carries out de- weight
Processing separates the heavy constituent for being located at tower bottom containing high-sulfur and intermittently sends out the intermediate separator, positioned at the MTBE mono- of tower top
Part mixes as the charging of online mixer with the liquefied gas to be recycled, extra part then send to MTBE storage tank into
Row storage, when the light dydrocarbon content in the MTBE in MTBE storage tank reaches default value, after the MTBE in MTBE storage tank is passed into
Grade separator carries out light dydrocarbon separation, and the MTBE after isolating light dydrocarbon is then used as the charging of online mixer and the liquefied gas mixed
It closes to be recycled.
In some embodiments of the present invention, the prime separator includes heat exchanger, desulfurizing tower, prime reboiling
Furnace, prime column bottoms pump, prime air cooler, in prime under water cooler, prime return tank of top of the tower, prime tower top return pump and prime
Water cooler；The heat exchanger is connect with water cooler under the online mixer, desulfurizing tower and prime respectively；The desulfurizing tower,
Water cooler, prime return tank of top of the tower and prime tower top return pump circuit sequentially connection on prime air cooler, prime；The prime
Column bottoms pump is separately connected the heat exchanger and desulfurizing tower；The desulfurizing tower is connect with the prime reboiler furnace；Liquefied gas and MTBE
It each leads into the online mixer and is mixed, mixed mixture enters the heat exchanger and is heated to reaction temperature
It spends and is delivered to desulfurizing tower and separated, the gas-liquid mixture isolated is successively after water cooler on prime air cooler and prime
Into prime return tank of top of the tower, on prime air cooler and prime water cooler respectively to be located at the gas-liquid mixture of desulfurizing tower tower top into
Row is air-cooled and water cooling is to condense acid water therein, and acid water, the prime tower are isolated in the prime return tank of top of the tower
Top return tank is pumped back to the desulfurizing tower circulation point by the prime overhead reflux for storing tower top material, remaining product
From liquefied gas is then separated by the prime tower top return pump before returning to the desulfurizing tower and sent to gas fractionation unit；
MTBE after separation be pressurized by the prime column bottoms pump after successively after water cooler under heat exchanger heat exchange and prime is cooling
It exports to intermediate separator.
In some embodiments of the present invention, the intermediate separator includes weight-removing column, intermediate reboiler furnace, on middle rank
Water cooler, intermediate return tank of top of the tower, intermediate tower top return pump, intermediate column bottoms pump and the lower water cooler of middle rank；The weight-removing column with
Prime separator and intermediate reboiler furnace are separately connected, water cooler on the weight-removing column, middle rank, middle rank return tank of top of the tower, in
Grade tower top return pump circuits sequentially connection, and the weight-removing column, intermediate column bottoms pump and the lower water cooler of middle rank are sequentially connected；MTBE warp
It crosses the weight-removing column and carries out heavy constituent separation, the gas-liquid mixture isolated is after water cooler on middle rank is cooling to intermediate tower top
Return tank is stood, and is then fed into intermediate tower top return pump pressurization and is returned to the weight-removing column multi-cycle separation, MTBE therein then exists
It is isolated before returning to the weight-removing column, a part of charging as online mixer is mixed with the liquefied gas to recycle and make
With extra part is then sent to MTBE storage tank and stored；Remaining heavy constituent enters weight-removing column and passes through the intermediate tower of tower bottom
It is recycled after bottom pump pressurization and the lower water cooler of middle rank are cooling.
In some embodiments of the present invention, when the light dydrocarbon content in the MTBE in MTBE storage tank is greater than 20%,
MTBE in MTBE storage tank is passed into rear class separator and carries out light dydrocarbon separation.
In some embodiments of the present invention, the rear class separator includes lightness-removing column, rear class reboiler furnace, in rear class
Water cooler under water cooler, rear class return tank of top of the tower, rear class tower top return pump, rear class column bottoms pump, rear class；The lightness-removing column and middle rank
Water cooler and rear class reboiler furnace are separately connected under the middle rank of separator, water cooler, rear class tower top on the lightness-removing column, rear class
Return tank, rear class tower top return pump circuit sequentially connection, and water cooler successively connects under the lightness-removing column, rear class column bottoms pump and rear class
It connects；MTBE carries out the separation of light dydrocarbon by the lightness-removing column, and the gas-liquid mixture isolated is after water cooler in rear class is cooling
It is stood to rear class return tank of top of the tower, is then fed into the pressurization of rear class tower top return pump and returns to the lightness-removing column multi-cycle separation, wherein
Light dydrocarbon component then isolated before returning to the lightness-removing column, the MTBE after isolating light dydrocarbon then passes through rear class column bottoms pump and is pressurized
And recycled after water cooler cooling under rear class, the charging as online mixer mixes to be recycled with the liquefied gas.
The present invention also provides a kind of liquefied gas desulfurizing methods, are applied to desulfuration of liquefied gas system described in any of the above embodiments
System, comprising:
Liquefied gas is each led into the online mixer with MTBE and is mixed, the sulphur ingredient in liquefied gas is turned
It moves in the MTBE；
Mixed mixture, which enters the prime separator, separates liquefied gas and MTBE, by the liquefaction after separation
Pneumatic transmission is to gas fractionation unit；
MTBE be passed into intermediate separator carry out it is de- handle again, make the heavy constituent separation for being located at tower bottom containing high-sulfur and intermittently
The intermediate separator is sent out, MTBE a part positioned at tower top is mixed as the charging of online mixer with the liquefied gas
It is recycled, extra part then send to MTBE storage tank and stored；
When the light dydrocarbon content in the MTBE in MTBE storage tank reaches default value, after the MTBE in MTBE storage tank is passed into
Grade separator carries out light dydrocarbon separation, and the MTBE after isolating light dydrocarbon is then used as the charging of online mixer and the liquefied gas mixed
It closes to be recycled.
In some embodiments of the present invention, the liquefied gas and MTBE separation specifically:
Liquefied gas each leads into online mixer with MTBE and is mixed, and mixed mixture enters heat exchanger
Be heated to reaction temperature and be delivered to desulfurizing tower being separated, the gas-liquid mixture isolated successively pass through prime air cooler and before
Enter prime return tank of top of the tower in grade after water cooler, water cooler is respectively to positioned at desulfurizing tower tower top on prime air cooler and prime
Gas-liquid mixture carries out air-cooled and water cooling to condense acid water therein, and acid water is isolated in prime return tank of top of the tower, preceding
Grade return tank of top of the tower is pumped back to the desulfurizing tower circulation point by prime overhead reflux for storing tower top material, remaining product
From liquefied gas is then separated by prime tower top return pump before returning to desulfurizing tower and sent to gas fractionation unit；After separation
MTBE is successively exported after water cooler under heat exchanger heat exchange and prime is cooling to middle fraction after being pressurized by prime column bottoms pump
From device.
In some embodiments of the present invention, the MTBE is passed into intermediate separator and carries out de- processing again specifically
Are as follows:
MTBE carries out heavy constituent separation by weight-removing column, and the gas-liquid mixture isolated is after water cooler on middle rank is cooling
It is stood to intermediate return tank of top of the tower, is then fed into intermediate tower top return pump pressurization and returns to the weight-removing column multi-cycle separation, wherein
MTBE then isolated before returning to the weight-removing column, a part is mixed as the charging of online mixer with the liquefied gas
It is recycled, extra part then send to MTBE storage tank and stored；Remaining heavy constituent enters weight-removing column and passes through tower bottom
The pressurization of intermediate column bottoms pump and the lower water cooler of middle rank it is cooling after recycle.
In some embodiments of the present invention, the method also includes: when the light dydrocarbon in the MTBE in MTBE storage tank contains
When amount is greater than 20%, the MTBE in MTBE storage tank is passed into rear class separator and carries out light dydrocarbon separation.
In some embodiments of the present invention, the MTBE in the MTBE storage tank is passed into rear class separator and carries out carbon
Five separation specifically:
MTBE carries out the separation of light dydrocarbon by lightness-removing column, and the gas-liquid mixture isolated is after water cooler in rear class is cooling
It is stood to rear class return tank of top of the tower, is then fed into the pressurization of rear class tower top return pump and returns to the lightness-removing column multi-cycle separation, wherein
Light dydrocarbon component then isolated before returning to the lightness-removing column, the MTBE after isolating light dydrocarbon then passes through rear class column bottoms pump and is pressurized
And recycled after water cooler cooling under rear class, the charging as online mixer mixes to be recycled with the liquefied gas.
Compared with prior art, the present invention has the following advantages:
Desulfuration of liquefied gas system described in the embodiment of the present invention mixes liquefied gas with MTBE by online mixer,
It is transferred to the sulphur ingredient in liquefied gas in the MTBE, liquefied gas and MTBE points is then made by prime separator respectively
From separating MTBE with heavy constituent by intermediate separator, and make MTBE and light dydrocarbon component point by rear class separator
From, while MTBE is recycled, middle in such a way that lye carries out desulfurization compared with the prior art, process of the invention
It is relatively easy, it is easy to operate, and also desulfurization effect is obvious, while obtaining subsidiary light dydrocarbon component and can be used as other products
Raw materials for production improve benefit.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the theory structure schematic diagram of desulfuration of liquefied gas system of the present invention；
Fig. 2 is the theory structure schematic diagram of online mixer of the present invention and prime separator；
Fig. 3 is the theory structure schematic diagram of intermediate separator of the present invention；
Fig. 4 is the theory structure schematic diagram of rear class separator of the present invention；
Fig. 5 is the flow diagram of liquefied gas desulfurizing method of the present invention.
Description of symbols:
100- online mixer；
200- prime separator, 201- heat exchanger, 202- desulfurizing tower, 203- prime reboiler furnace, 204- prime column bottoms pump,
On 205- prime air cooler, 206- prime before water cooler, 207- prime return tank of top of the tower, 208- prime tower top return pump, 209-
The lower water cooler of grade；
300- middle rank separator, 301- weight-removing column, 302- middle rank reboiler furnace, water cooler, 304- middle rank on 303- middle rank
Water cooler under return tank of top of the tower, 305- middle rank tower top return pump, 306- middle rank column bottoms pump, 307- middle rank；
400- rear class separator, 401- lightness-removing column, 402- rear class reboiler furnace, water cooler, 404- rear class in 403- rear class
Water cooler under return tank of top of the tower, 405- rear class tower top return pump, 406- rear class column bottoms pump, 407- rear class.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described.Obviously, described embodiment is only
A part of the embodiment of the present invention gives presently preferred embodiments of the present invention instead of all the embodiments in attached drawing.The present invention can
To realize in many different forms, however it is not limited to embodiment described herein, on the contrary, provide the mesh of these embodiments
Be to make the disclosure of the present invention more thorough and comprehensive.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.In description and claims of this specification and above-mentioned attached drawing
Term " includes " and " having " and their any deformations, it is intended that cover and non-exclusive include.Such as contain a system
The process, method, system, product or equipment of column step or unit are not limited to listed step or unit, but optional
Ground further includes the steps that not listing or unit, or optionally further comprising intrinsic for these process, methods, product or equipment
Other step or units.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
Containing at least one embodiment of the present invention.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Fig. 1 is the theory structure schematic diagram of desulfuration of liquefied gas system of the present invention, as shown in fig.1, the liquefied gas
Desulphurization system include the online mixer 100 for being sequentially connected setting, prime separator 200, intermediate separator 300 and after
Grade separator 400, liquefied gas and MTBE (methyl tert-butyl ether is methyl tertiary butyl ether(MTBE)) each lead into institute
It states and is mixed in online mixer 100, since sulphur ingredient is easier to dissolve each other with the MTBE, turn the sulphur ingredient in liquefied gas
It moves in the MTBE, mixed mixture enters the prime separator 200 and separated, by the liquefaction after separation
Pneumatic transmission to gas fractionation unit, and MTBE be then passed into intermediate separator 300 carry out it is de- handle again, make to be located at tower bottom containing high-sulfur
Heavy constituent separate and intermittently send out it is described middle rank separator 300, MTBE a part positioned at tower top is as online mixer
100 charging mixes to be recycled with the liquefied gas, and extra part is then sent to MTBE storage tank and stored, when MTBE is stored up
When light dydrocarbon content in MTBE in tank reaches default value, the MTBE in MTBE storage tank be passed into rear class separator 400 into
The separation of row light dydrocarbon, the MTBE after isolating light dydrocarbon are then used as the charging of online mixer 100 to be mixed with the liquefied gas to recycle
It uses.
Fig. 2 is the theory structure schematic diagram of online mixer 100 of the present invention and prime separator 200, refering to
Shown in Fig. 2, the prime separator 200 includes heat exchanger 201, desulfurizing tower 202, prime reboiler furnace 203, prime column bottoms pump
204, prime air cooler 205, water cooler 206, prime return tank of top of the tower 207, prime tower top return pump 208 and prime in prime
Lower water cooler 209；The heat exchanger 201 respectively with water cooler 209 under the online mixer 100, desulfurizing tower 202 and prime
Connection；The desulfurizing tower 202, prime air cooler 205, water cooler 206, prime return tank of top of the tower 207 and prime tower in prime
Top reflux pump 208 circuits sequentially connection；The prime column bottoms pump 204 is separately connected the heat exchanger 201 and desulfurizing tower 202；Institute
Desulfurizing tower 202 is stated to connect with the prime reboiler furnace 203；Liquefied gas and MTBE are each led into the online mixer 100
It is mixed, is transferred to the sulphur ingredient in liquefied gas in the MTBE, mixed mixture enters the heat exchanger 201
It is heated to reaction temperature and is delivered to desulfurizing tower 202 being separated, the gas-liquid mixture isolated successively passes through prime air cooler
205 and prime on enter prime return tank of top of the tower 207 after water cooler 206, water cooler 206 divides on prime air cooler 205 and prime
It is other (hydrogen sulfide containing to condense acid water therein to the air-cooled and water cooling of gas-liquid mixture progress for being located at 202 tower top of desulfurizing tower
Water), acid water is isolated in the prime return tank of top of the tower 207, the prime return tank of top of the tower 207 is for storing overhead materials
Material, and settle and separate acid water and the purpose of MTBE are played, remaining product is returned to described by the prime tower top return pump 208
202 multi-cycle separation of desulfurizing tower, liquefied gas 2000ppm containing total sulfur before mixing or so, MTBE total sulfur are less than 50ppm, MTBE and liquid
Change gas separation, MTBE sulfur content about 2000ppm after separation or so, liquefied gas then passes through before returning to the desulfurizing tower 202
The prime tower top return pump 208 is separated and is sent to gas fractionation unit；The prime reboiler furnace 203 is to the desulfurizing tower 202
Interior mixture carries out temperature heating by steam, and the condensed water after heating is used for the heat source of catalytic desulfurization tower 202, can be into one
Step reduces steam consumption；MTBE after separation be pressurized by the prime column bottoms pump 204 after successively by heat exchanger 201 exchange heat with
And it is exported after the cooling of water cooler 209 to intermediate separator 300 under prime.
Fig. 3 is the theory structure schematic diagram of intermediate separator 300 of the present invention, as shown in fig.3, the middle fraction
Include water cooler 303, intermediate return tank of top of the tower 304, intermediate tower on weight-removing column 301, intermediate reboiler furnace 302, middle rank from device 300
Push up reflux pump 305, intermediate column bottoms pump 306 and the lower water cooler 307 of middle rank；The weight-removing column 301 and prime separator 200
Water cooler 209 and intermediate reboiler furnace 302 are separately connected under prime, water cooler 303, intermediate tower on the weight-removing column 301, middle rank
Top return tank 304, intermediate tower top return pump 305 circuit sequentially connection, the weight-removing column 301, intermediate column bottoms pump 306 and middle rank
Lower water cooler 307 is sequentially connected；MTBE carries out heavy constituent separation by the weight-removing column 301, the gas-liquid mixture warp isolated
It is stood after crossing the upper cooling of water cooler 303 of middle rank to intermediate return tank of top of the tower 304, is then fed into intermediate tower top return pump 305 and increases
It is pressed back into 301 multi-cycle separation of weight-removing column, MTBE therein is then isolated before returning to the weight-removing column 301, a part
Charging as online mixer 100 is mixed with the liquefied gas to be recycled, extra part then send to MTBE storage tank into
Row storage；Remaining heavy constituent enters weight-removing column 301 and by the pressurization of the intermediate column bottoms pump 306 of tower bottom and the lower water cooler of middle rank
It is recycled after 307 coolings；The middle rank reboiler furnace 302 carries out temperature heating by steam to the mixture in the weight-removing column 301,
Condensed water after heating is used to be catalyzed the heat source of weight-removing column 301, can be further reduced steam consumption.
When the light dydrocarbon content in the MTBE in MTBE storage tank reaches default value, for example, when light dydrocarbon content is greater than 20%,
MTBE in MTBE storage tank is passed into rear class separator 400 and carries out light dydrocarbon separation, and Fig. 4 is rear class separator of the present invention
400 theory structure schematic diagram, as shown in fig.4, the rear class separator 400 includes lightness-removing column 401, rear class reboiler furnace
402, in rear class under water cooler 403, rear class return tank of top of the tower 404, rear class tower top return pump 405, rear class column bottoms pump 406, rear class
Water cooler 407；The lightness-removing column 401 divides with water cooler 307 under the middle rank of intermediate separator 300 and rear class reboiler furnace 402
It does not connect, water cooler 403, rear class return tank of top of the tower 404, rear class tower top return pump 405 be successively on the lightness-removing column 401, rear class
It is connected by circulation, water cooler 407 is sequentially connected under the lightness-removing column 401, rear class column bottoms pump 406 and rear class；Described in MTBE passes through
Lightness-removing column 401 carries out the separation of light dydrocarbon, and the gas-liquid mixture isolated is after water cooler 403 in rear class is cooling to rear class tower top
Return tank 404 is stood, and is then fed into the pressurization of rear class tower top return pump 405 and is returned to 401 multi-cycle separation of lightness-removing column, therein
Light dydrocarbon component is then isolated before returning to the lightness-removing column 401, and the MTBE after isolating light dydrocarbon then passes through rear class column bottoms pump 406
It is recycled after water cooler 407 is cooling under pressurization and rear class, the charging as online mixer 100 mixes to follow with the liquefied gas
Ring uses；The rear class reboiler furnace 402 carries out temperature heating by steam to the mixture in the lightness-removing column 401, after heating
Condensed water be used to be catalyzed the heat source of lightness-removing column 401, steam consumption can be further reduced.
Desulfuration of liquefied gas system described in the embodiment of the present invention mixes liquefied gas and MTBE by online mixer 100
Close, be transferred to the sulphur ingredient in liquefied gas in the MTBE, then respectively by prime separator 200 make liquefied gas with
MTBE separation, separates MTBE with heavy constituent by intermediate separator 300, and make MTBE by rear class separator 400
It is separated with light dydrocarbon component, while MTBE is recycled, it is middle in such a way that lye carries out desulfurization compared with the prior art,
Process of the invention is relatively easy, easy to operate, and desulfurization effect is obvious, while obtaining subsidiary light dydrocarbon component and can make
For the raw materials for production of other products, benefit is improved.
Based on the above embodiment, the present invention also provides a kind of liquefied gas desulfurizing methods, are applied to any of the above-described embodiment
The desulfuration of liquefied gas system, as shown in fig.5, Fig. 5 is the flow diagram of liquefied gas desulfurizing method of the present invention, institute
Liquefied gas desulfurizing method is stated to include the following steps:
S101: liquefied gas being each led into the online mixer with MTBE and is mixed, and makes the sulphur in liquefied gas
Ingredient is transferred in the MTBE.
S102: mixed mixture, which enters the prime separator, separates liquefied gas and MTBE, after separation
Liquefaction pneumatic transmission to gas fractionation unit.
In embodiments of the present invention, the liquefied gas and MTBE separation specifically: liquefied gas and MTBE are each led into
It is mixed in line mixer, mixed mixture enters heat exchanger and is heated to reaction temperature and is delivered to desulfurizing tower progress
Separation, the gas-liquid mixture isolated successively enter prime return tank of top of the tower after water cooler on prime air cooler and prime,
Water cooler carries out air-cooled and water cooling to the gas-liquid mixture for being located at desulfurizing tower tower top respectively to condense on prime air cooler and prime
Acid water therein, isolates acid water in prime return tank of top of the tower, and prime return tank of top of the tower is remaining for storing tower top material
Lower product is pumped back to the desulfurizing tower multi-cycle separation by prime overhead reflux, before liquefied gas then passes through before returning to desulfurizing tower
Grade tower top return pump is separated and is sent to gas fractionation unit；MTBE after separation successively passes through after being pressurized by prime column bottoms pump to be changed
It exports after water cooler is cooling under hot device heat exchange and prime to intermediate separator.
S103:MTBE be passed into intermediate separator carry out it is de- handle again, separate the heavy constituent for being located at tower bottom containing high-sulfur
And interval sends out the intermediate separator, positioned at charging and the liquefaction of the MTBE a part as online mixer of tower top
Gas mixes to be recycled, and extra part is then sent to MTBE storage tank and stored.
In embodiments of the present invention, the MTBE is passed into intermediate separator and de- handle again specifically: MTBE warp
It crosses weight-removing column and carries out heavy constituent separation, the gas-liquid mixture isolated is after water cooler on middle rank is cooling to intermediate overhead reflux
Tank is stood, and is then fed into intermediate tower top return pump pressurization and is returned to the weight-removing column multi-cycle separation, MTBE therein is then being returned to
It is isolated before the weight-removing column, a part of charging as online mixer is mixed with the liquefied gas to be recycled, more
It then send to MTBE storage tank and is stored in remaining part；Remaining heavy constituent enters weight-removing column and is increased by the intermediate column bottoms pump of tower bottom
It is recycled after pressure and the lower water cooler of middle rank are cooling.
S104: when the light dydrocarbon content in the MTBE in MTBE storage tank reaches default value, the MTBE in MTBE storage tank is logical
Enter to rear class separator and carry out light dydrocarbon separation, the MTBE after isolating light dydrocarbon is then used as the charging of online mixer and the liquid
Change gas mixing to be recycled.
In embodiments of the present invention, when the light dydrocarbon content in the MTBE in MTBE storage tank is greater than 20%, in MTBE storage tank
MTBE be passed into rear class separator carry out light dydrocarbon separation.
MTBE in the MTBE storage tank is passed into rear class separator and carries out light dydrocarbon separation specifically: MTBE is by de- light
Tower carries out the separation of light dydrocarbon, and the gas-liquid mixture isolated is quiet to rear class return tank of top of the tower after water cooler in rear class is cooling
It sets, is then fed into the pressurization of rear class tower top return pump and returns to the lightness-removing column multi-cycle separation, light dydrocarbon component therein is then returning to
Isolate before the lightness-removing column, the MTBE after isolating light dydrocarbon then pass through rear class column bottoms pump be pressurized and rear class under water cooler it is cold
But it recycles afterwards, the charging as online mixer mixes to be recycled with the liquefied gas.
Desulfuration of liquefied gas side provided by the embodiment of the present invention can be performed in desulfuration of liquefied gas system described in above-described embodiment
Method, the liquefied gas desulfurizing method have the corresponding functional component of desulfuration of liquefied gas system described in above-described embodiment and beneficial to effects
Fruit, referring specifically to the embodiment of above-mentioned desulfuration of liquefied gas system, details are not described herein for the embodiment of the present invention.
In above-described embodiment provided by the present invention, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the module, only
Only a kind of logical function partition, there may be another division manner in actual implementation, for example, multiple module or components can be tied
Another system is closed or is desirably integrated into, or some features can be ignored or not executed.
The above is only the embodiment of the present invention, are not intended to limit the scope of the patents of the invention, although with reference to the foregoing embodiments
Invention is explained in detail, still can be to aforementioned each specific reality for coming for those skilled in the art
It applies technical solution documented by mode to modify, or equivalence replacement is carried out to part of technical characteristic.It is all to utilize this
The equivalent structure that description of the invention and accompanying drawing content are done directly or indirectly is used in other related technical areas, similarly
Within the invention patent protection scope.
Claims (10)
1. a kind of desulfuration of liquefied gas system characterized by comprising be sequentially connected online mixer, the prime separation dress of setting
It sets, intermediate separator and rear class separator；Liquefied gas each leads into the online mixer with MTBE and is mixed
Close, be transferred to the sulphur ingredient in liquefied gas in the MTBE, mixed mixture enter the prime separator into
Row separation, by the liquefaction pneumatic transmission after separation to gas fractionation unit, and MTBE is then passed into intermediate separator and take off and locates again
Reason separates the heavy constituent for being located at tower bottom containing high-sulfur and intermittently sends out the intermediate separator, positioned at MTBE mono- of tower top
It is allocated as the charging for online mixer to be mixed with the liquefied gas to be recycled, extra part is then sent to MTBE storage tank and carried out
Storage, when the light dydrocarbon content in the MTBE in MTBE storage tank reaches default value, the MTBE in MTBE storage tank is passed into rear class
Separator carries out light dydrocarbon separation, and the MTBE after isolating light dydrocarbon is then used as the charging of online mixer to mix with the liquefied gas
To be recycled.
2. desulfuration of liquefied gas system according to claim 1, it is characterised in that: the prime separator includes heat exchange
Device, desulfurizing tower, prime reboiler furnace, prime column bottoms pump, prime air cooler, water cooler, prime return tank of top of the tower, prime tower in prime
Push up water cooler under reflux pump and prime；The heat exchanger respectively with water cooling under the online mixer, desulfurizing tower and prime
Device connection；The desulfurizing tower, prime air cooler, in prime water cooler, prime return tank of top of the tower and prime tower top return pump according to
It is secondary to be connected by circulation；The prime column bottoms pump is separately connected the heat exchanger and desulfurizing tower；The desulfurizing tower and the prime reboiling
Furnace connection；Liquefied gas each leads into the online mixer with MTBE and is mixed, and mixed mixture enters institute
It states heat exchanger to be heated to reaction temperature and be delivered to desulfurizing tower being separated, the gas-liquid mixture isolated successively passes through prime sky
Enter prime return tank of top of the tower on cooler and prime after water cooler, water cooler is respectively to positioned at desulfurization on prime air cooler and prime
The gas-liquid mixture of column overhead carries out air-cooled and water cooling to condense acid water therein, separates in the prime return tank of top of the tower
Acid water out, for the prime return tank of top of the tower for storing tower top material, remaining product passes through the prime overhead reflux blowback
To the desulfurizing tower multi-cycle separation, liquefied gas is then separated simultaneously before returning to the desulfurizing tower by the prime tower top return pump
It send to gas fractionation unit；MTBE after separation be pressurized by the prime column bottoms pump after successively by heat exchanger heat exchange and preceding
It exports after the lower water cooler of grade is cooling to intermediate separator.
3. desulfuration of liquefied gas system according to claim 1, it is characterised in that: the middle rank separator includes de- weight
Under the upper water cooler of tower, intermediate reboiler furnace, middle rank, intermediate return tank of top of the tower, middle rank tower top return pump, middle rank column bottoms pump and middle rank
Water cooler；The weight-removing column is separately connected with prime separator and intermediate reboiler furnace, water cooling on the weight-removing column, middle rank
Device, intermediate return tank of top of the tower, intermediate tower top return pump circuit sequentially connection, under the weight-removing column, middle rank column bottoms pump and middle rank
Water cooler is sequentially connected；MTBE carries out heavy constituent separation by the weight-removing column, and the gas-liquid mixture isolated is by middle rank
It is stood after water cooler is cooling to intermediate return tank of top of the tower, is then fed into intermediate tower top return pump pressurization and returns to the weight-removing column and follow
Ring separation, MTBE therein are then isolated before returning to the weight-removing column, charging and institute of a part as online mixer
Liquefied gas mixing is stated to be recycled, extra part is then sent to MTBE storage tank and stored；Remaining heavy constituent enters de- weight
It is recycled after water cooler is cooling under tower and the intermediate column bottoms pump for passing through tower bottom are pressurized and are intermediate.
4. desulfuration of liquefied gas system according to claim 3, which is characterized in that the light dydrocarbon in the MTBE in MTBE storage tank
When content is greater than 20%, the MTBE in MTBE storage tank is passed into rear class separator and carries out light dydrocarbon separation.
5. desulfuration of liquefied gas system according to claim 4, it is characterised in that: the rear class separator includes de- light
Tower, rear class reboiler furnace, water cooler, rear class return tank of top of the tower, rear class tower top return pump, rear class column bottoms pump, rear class are lauched in rear class
Cooler；The lightness-removing column is separately connected with water cooler under the middle rank of intermediate separator and rear class reboiler furnace, the lightness-removing column,
Water cooler, rear class return tank of top of the tower, rear class tower top return pump circuit sequentially connection, the lightness-removing column, rear class column bottoms pump in rear class
And water cooler is sequentially connected under rear class；MTBE carries out the separation of light dydrocarbon, the gas-liquid mixture isolated by the lightness-removing column
It is stood after water cooler in rear class is cooling to rear class return tank of top of the tower, is then fed into the pressurization of rear class tower top return pump and returns to institute
Lightness-removing column multi-cycle separation is stated, light dydrocarbon component therein is then isolated before returning to the lightness-removing column, after isolating light dydrocarbon
MTBE then pass through rear class column bottoms pump be pressurized and rear class under water cooler it is cooling after recycle, as online mixer charging with it is described
Liquefied gas mixes to be recycled.
6. a kind of liquefied gas desulfurizing method is applied to the described in any item desulfuration of liquefied gas systems of the claims 1-5, special
Sign is, comprising:
Liquefied gas is each led into the online mixer with MTBE and is mixed, the sulphur ingredient in liquefied gas is transferred to
In the MTBE；
Mixed mixture, which enters the prime separator, separates liquefied gas and MTBE, by the liquefaction pneumatic transmission after separation
To gas fractionation unit；
MTBE be passed into intermediate separator carry out it is de- handle again, make the heavy constituent separation for being located at tower bottom containing high-sulfur and interval submitting
The middle rank separator is mixed with the liquefied gas as the charging of online mixer positioned at MTBE a part of tower top to follow
Ring uses, and extra part is then sent to MTBE storage tank and stored；
When the light dydrocarbon content in the MTBE in MTBE storage tank reaches default value, the MTBE in MTBE storage tank is passed into rear fraction
Light dydrocarbon separation is carried out from device, it is next that the MTBE after isolating light dydrocarbon is then used as the charging of online mixer to mix with the liquefied gas
It is recycled.
7. liquefied gas desulfurizing method according to claim 6, which is characterized in that the liquefied gas and MTBE separation are specific
Are as follows:
Liquefied gas each leads into online mixer with MTBE and is mixed, and mixed mixture enters heat exchanger heating
It to reaction temperature and is delivered to desulfurizing tower and is separated, the gas-liquid mixture isolated successively passes through in prime air cooler and prime
Enter prime return tank of top of the tower after water cooler, water cooler is respectively to the gas-liquid for being located at desulfurizing tower tower top on prime air cooler and prime
Mixture carries out air-cooled and water cooling to condense acid water therein, and acid water, prime tower are isolated in prime return tank of top of the tower
For top return tank for storing tower top material, remaining product is pumped back to the desulfurizing tower multi-cycle separation, liquid by prime overhead reflux
Change gas then to separate and send to gas fractionation unit by prime tower top return pump before returning to desulfurizing tower；MTBE after separation is logical
It crosses after the pressurization of prime column bottoms pump and successively exports after water cooler under heat exchanger heat exchange and prime is cooling to intermediate separator.
8. liquefied gas desulfurizing method according to claim 6, which is characterized in that the MTBE is passed into intermediate separator
Take off and handle again specifically:
MTBE carries out heavy constituent separation by weight-removing column, and the gas-liquid mixture isolated is after water cooler on middle rank is cooling into
Grade return tank of top of the tower is stood, and is then fed into intermediate tower top return pump pressurization and is returned to the weight-removing column multi-cycle separation, therein
MTBE is then isolated before returning to the weight-removing column, and a part mixes to come with the liquefied gas as the charging of online mixer
It is recycled, extra part is then sent to MTBE storage tank and stored；Remaining heavy constituent enters weight-removing column and by tower bottom
It is recycled after intermediate column bottoms pump pressurization and the lower water cooler of middle rank are cooling.
9. liquefied gas desulfurizing method according to claim 8, which is characterized in that the method also includes: when MTBE storage tank
When light dydrocarbon content in interior MTBE is greater than 20%, the MTBE in MTBE storage tank is passed into rear class separator and carries out light dydrocarbon point
From.
10. liquefied gas desulfurizing method according to claim 9, which is characterized in that the MTBE in the MTBE storage tank is passed through
Light dydrocarbon separation is carried out to rear class separator specifically:
MTBE carries out the separation of light dydrocarbon by lightness-removing column, and the gas-liquid mixture isolated is after water cooler in rear class is cooling after
Grade return tank of top of the tower is stood, and is then fed into the pressurization of rear class tower top return pump and is returned to the lightness-removing column multi-cycle separation, carbon therein
Five components are then isolated before returning to the lightness-removing column, the MTBE after isolating light dydrocarbon then pass through rear class column bottoms pump be pressurized and
It is recycled after water cooler is cooling under rear class, the charging as online mixer mixes to be recycled with the liquefied gas.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013199534A (en) * | 2012-03-23 | 2013-10-03 | Idemitsu Kosan Co Ltd | Method for producing desulfurized gaseous fuel |
| CN106861401A (en) * | 2017-03-22 | 2017-06-20 | 武汉国力通能源环保股份有限公司 | LPG Desulfurization cleaning system and purification method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013199534A (en) * | 2012-03-23 | 2013-10-03 | Idemitsu Kosan Co Ltd | Method for producing desulfurized gaseous fuel |
| CN106861401A (en) * | 2017-03-22 | 2017-06-20 | 武汉国力通能源环保股份有限公司 | LPG Desulfurization cleaning system and purification method |
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