CN208980608U - A kind of device using the light alcohol preparation anhydrous low-carbon mixed alcohol of F- T synthesis by-product - Google Patents
A kind of device using the light alcohol preparation anhydrous low-carbon mixed alcohol of F- T synthesis by-product Download PDFInfo
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Abstract
A kind of device using the light alcohol preparation anhydrous low-carbon mixed alcohol of F- T synthesis by-product, described device includes by the light alcohol infiltrating and vaporizing membrane dewatering unit of the sequentially connected raw material of pipeline, hydrogenation unit and adding the light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen, wherein the light alcohol infiltrating and vaporizing membrane dewatering unit of the raw material includes passing through the sequentially connected feed heater of pipeline and the first infiltrating and vaporizing membrane dehydrator；The hydrogenation unit includes passing through the sequentially connected hydrogenating materials heater of pipeline, hydrogenator and hydrogenation liquid/gas separator；The described plus light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen includes adding the light alcohol heater of hydrogen and the second infiltrating and vaporizing membrane dehydrator by the way that pipeline is sequentially connected.The content of water and non-alcohols oxygen-containing organic compound in low carbon mixed alcohol can be effectively reduced in the utility model, improves product quality.
Description
Technical field
The utility model belongs to chemical technology field, and in particular to a kind of light alcohol of utilization Fischer-Tropsch by-product synthesis prepares anhydrous low
The device of carbon mixed alcohol.
Background technique
In the ICL for Indirect Coal Liquefaction of F- T synthesis route, a large amount of aqueous phase by-product, water phase by-product are inevitably generated
Object obtains aqueous lightweight and mixes alcohol by the processing such as oil removing, neutralization, rectifying and dewatering, predominantly low-carbon alcohols (methanol, ethyl alcohol, propyl alcohol,
Butanol) and water, also contain aldehyde (acetaldehyde, propionic aldehyde, butyraldehyde), ketone (acetone, butanone, pentanone, hexanone), ester (methyl acetate, acetic acid second
Ester) etc. non-alcohols low-carbon oxygen-containing organic compound.
The components such as water and ethyl alcohol, propyl alcohol, butanol in the light alcohol of F- T synthesis by-product form alcohol-water azeotropic mixture, and non-alcohols contain
Oxygen organic compound and water or alcohol form azeotropic mixture, it is difficult to be separated by conventional rectification method, limit the utilization of light alcohol.
The presence of azeotropic system limits the utilization of the light alcohol of F- T synthesis by-product, if light alcohol direct emission will cause serious money
Source waste and environmental pollution.The moisture in the mixed alcohol of aqueous lightweight is removed, non-alcohols oxygen-containing organic compound is converted, is obtained
Anhydrous low-carbon mixed alcohol has huge Significance for Environment and economic significance.
Anhydrous low-carbon mixed alcohol has broad application prospects, and summing up mainly has the following aspects: 1) being used as substitution
Fuel；2) clean gasoline additive；3) it is used as liquefied petroleum gas (LPG) substitute；4) directly as general chemistry solvent etc.；
5) chemicals and industrial chemicals；6) further separation, is made single methanol.
Currently, being directed to the dehydration containing water azeotropic system, conventional method mainly has:
1) azeotropic distillation (constant boiling rectification method)；Third component is added in alcohol-water azeotropic system and forms new system, changes
Relative volatility in substance system between each component, and one of third component and substance system component form minimum azeotropic mixture,
It is steamed in the form of new azeotropic mixture from tower top, alcohol-water separation is realized with this and is dehydrated；
2) extraction fractional distillation；Third component is added in alcohol-water azeotropic system and forms new system, changes each group in substance system
/ relative volatility, third component with high boiling liquid from tower bottom be discharged, alcohol-water separation is realized with this and is dehydrated；
3) molecular sieve adsorption；Molecular sieve is the solid absorbent with porous network structure, generally the silicon of crystalline state
Hydrochlorate or alumino-silicate.Every kind of molecular sieve has specific uniform aperture, and the molecule smaller than its pore size is only allowed to pass through, and
By those macromolecular substances exclusions, to play the role of " sieving ".Separation alcohol-water object system generallys use 3A molecular sieve,
I.e. the pore size of molecular sieve is 0.3nm.Because hydrone diameter is about 2.65A (1A=0.1nm), and alcohol molecular diameter score
Son sieve micro-pore diameter is big；In addition, hydrone has very strong positron-electron density, with molecular sieve there are highly polar sucking action,
Hydrone can enter molecular sieve and is firmly adsorbed on inside molecular sieve in this way, and alcohol molecule is then blocked in outside, thus real
Now water and alcohol are selectively adsorbing and separating.Molecular sieve has certain adsorption capacity, after reaching adsorption saturation, lose adsorption energy
Power needs to regenerate molecular sieve, removes the water of absorption, adsorbent of molecular sieve is made to have adsorption capacity again.
It is all had the disadvantage that for the traditional technology containing water azeotropic system
1) constant boiling rectification method, technical maturity are widely used, but nonvariant boiling reagent is produced from top of tower, and energy consumption is higher；Introduce new group
Point, there is residual in product；And the use of common nonvariant boiling reagent benzene is harmful to operator's body, therefore will be gradually by environmentally protective
Replaced new process；
2) extraction fractional distillation, extractant are produced from tower reactor, and energy consumption is smaller, but require extractant recovery tower harsh, solvent
There is partial loss, and introduce new component, has residual in product；
3) molecular sieve adsorption, simple process do not introduce novel substance, and process is environmentally protective, and products obtained therefrom purity is higher, but
The light alcohol water content of F- T synthesis by-product is higher, is such as directly dehydrated with molecular sieve adsorption, molecular sieve loadings are big, bed Workflow
Temperature, regenerative process process is complicated, operating difficulties.
For traditional technology in the light alcohol of separation F- T synthesis by-product, technological adaptability is poor, and does not fully consider water in light alcohol
With all higher actual conditions of non-alcohols oxygen-containing organic compound, cause non-alcohols oxygen-containing organic compound content in product high,
Alcohol content is not up to standard.
Utility model content
In order to overcome the defects of the prior art, it is prepared the utility model proposes a kind of using the light alcohol of F- T synthesis by-product
The method and apparatus of anhydrous low-carbon mixed alcohol add hydrogen by the dehydration of two steps and two steps, can be used for by the light alcohol system of F- T synthesis by-product
Standby anhydrous low-carbon mixes alcohol.
In order to achieve the above objectives, it is mixed using the light alcohol preparation anhydrous low-carbon of F- T synthesis by-product that the utility model proposes a kind of
The device of alcohol is closed, including by the light alcohol infiltrating and vaporizing membrane dewatering unit of the sequentially connected raw material of pipeline, hydrogenation unit and adds hydrogen light
Alcohol infiltrating and vaporizing membrane dewatering unit,
Wherein the light alcohol infiltrating and vaporizing membrane dewatering unit of the raw material includes that feed heater and the are sequentially connected by pipeline
One infiltrating and vaporizing membrane dehydrator and the light alcohol container of dehydration；
The hydrogenation unit includes passing through the sequentially connected hydrogenating materials heater of pipeline, hydrogenator and hydrogenation liquid
Separator；
The described plus light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen include by pipeline is sequentially connected plus the light alcohol heater of hydrogen and
Second infiltrating and vaporizing membrane dehydrator.
Preferably, the light alcohol infiltrating and vaporizing membrane dewatering unit of the raw material further includes raw material pump and is dehydrated light alcohol container, described
Raw material pump is connected with the feed heater, and the light alcohol container of dehydration is connected with the entrance of the hydrogenation unit.
Preferably, hydrogen inlet manifold is provided on the hydrogenating materials heater, the hydrogenation liquid/gas separator is used for will
Add the light alcohol of hydrogen and unreacted Hydrogen Separation, separation adds the light alcohol of hydrogen to pass through pipeline to the described plus light alcohol infiltrating and vaporizing membrane of hydrogen
Dewatering unit.
Preferably, described plus the light alcohol heater of hydrogen entrance adds the light alcohol outlet phase of hydrogen with the hydrogenation liquid/gas separator
Even, the second infiltrating and vaporizing membrane dehydrator is used for adding the light alcohol of hydrogen to be dehydrated to obtain anhydrous low-carbon mixed alcohol.
Preferably, the light alcohol infiltrating and vaporizing membrane dewatering unit of the raw material further includes the permeate condenser connected by pipeline
With infiltration gas-liquid separator, the permeate condenser is connected with the infiltration vent outlet of the infiltrating and vaporizing membrane dehydrator.
Preferably, the infiltration gas-liquid separator is connected with vacuum plant.
Preferably, the hydrogenation unit includes one or more concatenated hydrogenators, it is preferable that the hydrogenation liquid
The hydrogen of separator separation is recycled in the hydrogenator by circulating hydrogen compressor.
Preferably, the described plus light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen further includes low carbon mixed alcohol condenser and infiltration gas-liquid
Separator, the entrance of the low carbon mixed alcohol condenser and the anhydrous low-carbon mixed alcohol of the second infiltrating and vaporizing membrane dehydrator go out
Mouth is connected.
Preferably, the described plus light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen further includes permeate condenser, the infiltration liquid cooling
The entrance of condenser is connected with the infiltration vent outlet of the second infiltrating and vaporizing membrane dehydrator, it is preferable that the permeate condenser
Outlet be connected with the entrance of the infiltration gas-liquid separator of the light alcohol infiltrating and vaporizing membrane dewatering unit of the raw material.
Compared with traditional technology, the technical solution of the utility model is had the advantages that
(1) it is directed to the dehydration containing water azeotropic system, the utility model uses infiltrating and vaporizing membrane separating and dehydrating technology.Easily infiltration
Hydrone dissolution or be adsorbed in the upstream face of film, then using component permeable pressure head in mixture be that motive force passes through film, then
From the downstream desorption of film, film downstream is vacuum system, and the two sides partial pressure of film is mass transfer force, through object in vacuum system vapour
Change and the collection that is condensed, alcohol-water separation is realized with this and is dehydrated.Compared with traditional technology, advantage is obvious:
1. comparing azeotropic distillation and extraction fractional distillation, novel substance is not introduced, process is green, and product purity is higher；
2. comparing molecular sieve adsorption, low energy consumption, and alcohol selectivity is high, easy to operate；
(2) feed moisture content is higher, is dehydrated in two steps, can be carried out to raw material using infiltration evaporation membrane separation process tentatively de-
Water obtains anhydrous low-carbon mixed alcohol to adding the light alcohol of hydrogen to be further dehydrated；
(3) non-alcohols such as aldehyde, ketone, ester oxygen-containing organic compound content is higher in raw material, and the method for hydrogen is added with two steps, will be non-
Alcohols oxygen-containing organic compound is fully converted into alcohol, improves product quality, improves economic value.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the device of anhydrous low-carbon mixed alcohol is prepared in the utility model embodiment.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is described in further detail.
The utility model comprehensively considers the light alcohol compositions of F- T synthesis by-product and the existing dehydration technique containing water azeotropic system to adapt to
Property, it proposes a kind of reasonable process flow, preliminary hydro-extraction is carried out to raw material with infiltration evaporation membrane separation process, then add hydrogen will through two steps
Non-alcohols transforming oxygenated organic compound is alcohol, finally with infiltration evaporation membrane separation process to adding the light alcohol of hydrogen to carry out deep dehydration.
As shown in Figure 1, utilizing in the utility model embodiment takes the light alcohol preparation anhydrous low-carbon mixed alcohol of synthesis support by-product
Device include: the light alcohol infiltrating and vaporizing membrane dewatering unit of raw material, hydrogenation unit and add the light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen.
The light alcohol infiltrating and vaporizing membrane dewatering unit of raw material includes raw material pump P1, feed heater H1, infiltrating and vaporizing membrane dehydrator
B1 is dehydrated light alcohol tank D1, is dehydrated light alcohol delivery pump P2, permeate condenser H2, permeates gas-liquid separator D2, and lime set pumps P3, very
Sky pump P4 and P1 attached light alcohol inlet tube, light alcohol outlet pipe and flow control system is H1 attached light alcohol inlet tube, light
Alcohol outlet pipe, heating system and temperature control system, B1 attached light alcohol inlet tube, seep vent outlet at the light alcohol outlet pipe of dehydration
Pipe and concurrent heating system, the light alcohol inlet tube of D1 attached dehydration, the light alcohol outlet pipe of dehydration, the light alcohol inlet tube of P2 attached dehydration take off
The light alcohol outlet pipe of water and pump flow control system, H2 attached infiltration gas inlet pipe, penetrating fluid outlet, cooling system and temperature
Control system, D2 attached penetrating fluid inlet tube, penetrating fluid outlet and pumping air outlet, P3 attached penetrating fluid import
Pipe, penetrating fluid outlet and flow control system, P4 attached evacuation gas inlet pipe take out air outlet and vacuum degree control system
System.
Hydrogenation unit includes hydrogenating materials heater H3, hydrogenator R1, hydrogenator R2, the separation of hydrogenation liquid
Device D3, adds hydrogen light alcohol pump P5, circulating hydrogen compressor C1 and H3 attached hydrogenating materials inlet tube, hydrogenating materials outlet,
Cooling system and temperature control system, R1/R2 attached inlet tube, outlet and temperature control system, D3 it is attached plus hydrogen it is light
Alcohol inlet tube plus the light alcohol outlet pipe of hydrogen and hydrogen outlet pipe, P5 attached hydrogenated products inlet tube plus the light alcohol outlet pipe of hydrogen and stream
Amount control system, C1 attached recycle hydrogen inlet tube, recycle hydrogen outlet and compressor control system.
Hydrogenation catalyst is Raney nickel, copper catalyst or noble metal catalyst, preferably Raney nickel；Hydrogenator is
Isothermal shell and tube reactor or insulation fix bed reactor；Adding hydrogen mode is gas phase hydrogenation or liquid-phase hydrogenatin, and preferred liquid phase adds hydrogen.
The light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen is added to include plus the light alcohol heater H4 of hydrogen, infiltrating and vaporizing membrane dehydrator B2, it is low
Carbon mixed alcohol condenser H5, low carbon mixed alcohol tank D4, low carbon mixed alcohol pump P6, permeate condenser H6 and H4 is attached to be added
The light alcohol inlet tube of hydrogen plus the light alcohol outlet pipe of hydrogen, heating system and temperature control system, infiltrating and vaporizing membrane dehydrator B2 is attached to be added
The light alcohol inlet tube of hydrogen, low carbon mixed alcohol outlet, infiltration gas outlet and concurrent heating system, low carbon mixed alcohol condenser H5 are attached
Low carbon mixed alcohol inlet tube, low carbon mixed alcohol outlet, cooling system and temperature control system, low carbon mixed alcohol tank D4 are attached
Low carbon mixed alcohol inlet tube and low carbon mixed alcohol liquid outlet, low carbon mixed alcohol pump the attached low carbon mixed alcohol inlet tube of P6, low
Carbon mixed alcohol outlet and flow control system, it is permeate condenser H6 attached infiltration gas inlet pipe, penetrating fluid outlet, cold
But system and temperature control system.
The light alcohol infiltrating and vaporizing membrane dewatering unit of raw material and plus the light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen in, infiltrating and vaporizing membrane is de-
The membrane material of hydrophone is organic film material or inorganic material film.Infiltrating and vaporizing membrane dehydrator feed state be gas phase or liquid phase, it is excellent
Select gas phase.Different dehydration membrane materials can be used according to the difference of feed moisture content.
When using described device preparation anhydrous low-carbon mixed alcohol, light alcohol is added after H1 is heated by P1 enters B1 infiltration evaporation
UF membrane dehydration, enters D1, then pressurize through P2, H3 is sent into after mixing with recycle hydrogen, sequentially enters R1 and R2 after heating after dehydration
Hydrogenation reaction occurs by non-alcohols oxygen-containing organic compound (such as aldehyde, ketone, ester etc.) hydro-conversion, enter after hydro-conversion D3 into
Row gas-liquid separation.Hydrogen at the top of D3 is mixed with fresh hydrogen Ji Wei recycle hydrogen after being sent into C1 pressurization.The bottom D3 adds the light alcohol warp of hydrogen
P5 is sent into H4, enters B2 infiltrating and vaporizing membrane after heating vaporization and is dehydrated to obtain low carbon mixed alcohol, enters back into after H5 is condensed after entering D4
Through P6 carrying device.The infiltration gas of B1, which enters after H2 condensation, obtains penetrating fluid into D2, then through P3 carrying device.P4 takes out D2 gas
Body maintains the vacuum degree of B1 per-meate side, guarantees osmotic, evaporating and dewatering effect；The infiltration gas of B2 enter H6 condensation after carrying device or
Person is delivered to D2.
In one embodiment, technological condition when preparing anhydrous low-carbon mixed alcohol is as follows:
Osmotic, evaporating and dewatering device B1: dehydration lateral pressure 0.1MPa~0.5MPa, 80 DEG C~180 DEG C of temperature:
Osmotic lateral pressure -0.1~0MPa, 80 DEG C~180 DEG C of temperature；
Hydrogenator R1/R2: 0.3~8.0MPa of reaction pressure, 90 DEG C~300 DEG C of reaction temperature；
Osmotic, evaporating and dewatering device B2: dehydration lateral pressure 0.1MPa~0.5MPa, 80 DEG C~180 DEG C of temperature.
The result shows that water and non-alcohols oxygen-containing organic compound in low carbon mixed alcohol can be effectively reduced in the utility model
Content, improve product quality.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, are not limited to this reality
With novel, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all include
It is within the protection scope of the utility model.
Claims (10)
1. a kind of device using the light alcohol preparation anhydrous low-carbon mixed alcohol of F- T synthesis by-product, which is characterized in that including passing through pipe
The light alcohol infiltrating and vaporizing membrane dewatering unit of the sequentially connected raw material in road, hydrogenation unit and plus the light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen；
Wherein the light alcohol infiltrating and vaporizing membrane dewatering unit of the raw material includes being sequentially connected feed heater and first by pipeline to seep
Vaporization film dehydrator and the light alcohol container of dehydration thoroughly；
The hydrogenation unit includes by the sequentially connected hydrogenating materials heater of pipeline, hydrogenator and the separation of hydrogenation liquid
Device；
The described plus light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen includes adding the light alcohol heater of hydrogen and second by the way that pipeline is sequentially connected
Infiltrating and vaporizing membrane dehydrator.
2. the apparatus according to claim 1, wherein the light alcohol infiltrating and vaporizing membrane dewatering unit of raw material further includes raw material pump
With the light alcohol container of dehydration, the raw material pump is connected with the feed heater, the light alcohol container of dehydration and the hydrogenation unit
Entrance be connected.
3. the apparatus according to claim 1, wherein it is provided with hydrogen inlet manifold on the hydrogenating materials heater, it is described
For hydrogenation liquid/gas separator for that will add the light alcohol of hydrogen and unreacted Hydrogen Separation, separation adds the light alcohol of hydrogen to pass through pipeline to institute
It states and adds the light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen.
4. the apparatus according to claim 1, wherein the light alcohol infiltrating and vaporizing membrane dewatering unit of raw material further includes passing through pipe
The permeate condenser and infiltration gas-liquid separator of road connection, the permeate condenser and the infiltrating and vaporizing membrane dehydrator
Vent outlet is seeped to be connected.
5. device according to claim 4, wherein the infiltration gas-liquid separator is connected with vacuum plant.
6. the apparatus according to claim 1, wherein the hydrogenation unit includes one or more concatenated hydrogenation reactions
Device.
7. the apparatus according to claim 1, wherein the hydrogen of the hydrogenation liquid/gas separator separation passes through circulation hydrogen compressed
Machine is recycled in the hydrogenator.
8. the apparatus according to claim 1, wherein the described plus light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen further includes that low-carbon is mixed
Alcohol condenser and infiltration gas-liquid separator are closed, the entrance of the low carbon mixed alcohol condenser and second infiltrating and vaporizing membrane are dehydrated
The anhydrous low-carbon mixing alcohol outlet of device is connected.
9. the apparatus according to claim 1, wherein the described plus light alcohol infiltrating and vaporizing membrane dewatering unit of hydrogen further includes penetrating fluid
Condenser, the entrance of the permeate condenser are connected with the infiltration vent outlet of the second infiltrating and vaporizing membrane dehydrator.
10. device according to claim 9, wherein the outlet of the permeate condenser and the light alcohol of the raw material permeate
The entrance for vaporizing the infiltration gas-liquid separator of film dewatering unit is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338853.6U CN208980608U (en) | 2018-08-16 | 2018-08-16 | A kind of device using the light alcohol preparation anhydrous low-carbon mixed alcohol of F- T synthesis by-product |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821338853.6U CN208980608U (en) | 2018-08-16 | 2018-08-16 | A kind of device using the light alcohol preparation anhydrous low-carbon mixed alcohol of F- T synthesis by-product |
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