CN116808617A - BDO concentration system - Google Patents
BDO concentration system Download PDFInfo
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- CN116808617A CN116808617A CN202310835115.1A CN202310835115A CN116808617A CN 116808617 A CN116808617 A CN 116808617A CN 202310835115 A CN202310835115 A CN 202310835115A CN 116808617 A CN116808617 A CN 116808617A
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- tower
- bdo
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- membrane
- concentration
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- 239000012528 membrane Substances 0.000 claims abstract description 94
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 238000004140 cleaning Methods 0.000 claims abstract description 4
- 239000012141 concentrate Substances 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 60
- 239000000047 product Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 108090000623 proteins and genes Proteins 0.000 claims description 23
- 102000004169 proteins and genes Human genes 0.000 claims description 23
- 238000000855 fermentation Methods 0.000 claims description 17
- 230000004151 fermentation Effects 0.000 claims description 17
- 235000013405 beer Nutrition 0.000 claims description 16
- 239000012466 permeate Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 239000002808 molecular sieve Substances 0.000 claims description 11
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 11
- 239000006228 supernatant Substances 0.000 claims description 10
- 239000012460 protein solution Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 6
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000005119 centrifugation Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 7
- 239000006227 byproduct Substances 0.000 abstract description 4
- 238000004821 distillation Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 description 7
- 108010077805 Bacterial Proteins Proteins 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 206010013496 Disturbance in attention Diseases 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
- B01D3/145—One step being separation by permeation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/001—Processes specially adapted for distillation or rectification of fermented solutions
- B01D3/003—Rectification of spirit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/143—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step
- B01D3/148—Fractional distillation or use of a fractionation or rectification column by two or more of a fractionation, separation or rectification step in combination with at least one evaporator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0045—Vacuum condensation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/78—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by condensation or crystallisation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a BDO concentration system, which comprises a thick mash tower, a clear mash tower, a rectifying tower and a membrane component mechanism, wherein the thick mash tower is connected with the rectifying tower, the clear mash tower is connected with the rectifying tower, and the rectifying tower is connected with the membrane component mechanism. Wherein, part of the strain concentration high-concentration mash is conveyed to a thick mash tower, the other part of strain concentration low-concentration clear liquid is conveyed to a clear mash tower, the thick mash tower works under negative pressure, the clear mash tower works under normal pressure, the rectifying tower works under pressurization, and the membrane component works under low pressure. According to the invention, by arranging the thick mash tower, the mash cleaning tower, the crude wine tank and the membrane assembly mechanism which are sequentially matched, traditional distillation and inorganic membrane are organically combined to concentrate BDO, so that the problem of difficulty in BDO concentration in the existing production process is solved, the by-product BDO is good in concentration effect and suitable for decomposition, and the requirements of the daily chemical industry on BDO can be greatly met by using the invention.
Description
Technical Field
The invention relates to the technical field of BDO concentration systems, in particular to the technical field of separating and concentrating BDO in the process of preparing fuel ethanol by using iron alloy industrial tail gas fermentation, and specifically relates to a BDO concentration system. .
Background
In the production process of the technical field of preparing fuel ethanol by using ferroalloy industrial tail gas fermentation method, two parts of solutions are produced: one part is clear liquid filtered by the fermented ceramic membrane, and the other part is mash filtered by the fermented ceramic membrane. The existing distillation system mainly comprises the steps of distilling two streams of liquid to extract ethanol and protein powder, preparing the ethanol by a thick mash tower, a clear mash tower A, a clear mash tower B and a rectifying tower, steaming thick wine by the thick mash tower, and delivering tower bottom liquid to protein centrifugal separation and spray drying to prepare the protein powder. The byproduct BDO has poor concentration effect, is not suitable for decomposition, and causes serious influence on downstream sewage, but has better economic benefit, is mainly applied to cosmetics, has moisturizing effect, has high BDO requirement in daily chemical industry along with rising of daily chemical industry in recent years, and can greatly meet the BDO requirement in daily chemical industry when being applied.
Disclosure of Invention
The invention mainly aims to provide a BDO concentration system, which aims to solve the technical problems of poor BDO concentration effect of byproducts, difficult decomposition and serious influence of downstream sewage in the prior art.
In order to achieve the above purpose, the invention provides a BDO concentrating system, which comprises a thick mash tower, a clear mash tower, a rectifying tower and a membrane component mechanism, wherein the thick mash tower is connected with the rectifying tower, the clear mash tower is connected with the rectifying tower, and the rectifying tower is connected with the membrane component mechanism. Wherein, part of the strain concentration high-concentration mash is conveyed to a thick mash tower, the other part of strain concentration low-concentration clear liquid is conveyed to a clear mash tower, the thick mash tower works under negative pressure, the clear mash tower works under normal pressure, the rectifying tower works under pressurization, and the membrane component works under low pressure;
the thick mash tower separates crude alcohol in thick mash from bacterial protein solution, the crude alcohol is sent to the rectifying tower to separate BDO from ethanol, the bacterial protein solution is sent to the protein section for centrifugal separation, and the supernatant fluid absorbs water through the membrane component, and the bacterial protein solution at the lower layer is used for preparing protein powder;
the clear mash tower separates crude alcohol in clear mash from vinasse solution, the vinasse solution is sent to a fermentation and recycling tower, and the crude alcohol is sent to a rectifying tower to separate BDO from alcohol;
the rectifying tower is used for further separating crude alcohol distilled from the thick mash tower and the clear mash tower and supernatant after centrifugation, and wine steam is sent to an alcohol storage tank from the top, and tower bottom BDO contains a small amount of water;
the membrane component mechanism is a process of absorbing water by a membrane component through the tower bottom BDO of the rectifying tower and the protein centrifugal clear liquid to obtain a finished BDO product.
Optionally, the thick mash tower is connected with a mash main pipe of an upstream fermentation working section, is connected with a downstream protein working section, and the clear mash tower is connected with a clear liquid main pipe of the upstream fermentation working section.
Optionally, the concentration OD range of the feed mash strain of the thick mash tower is more than or equal to 20g/L, and the concentration OD range of the feed clear liquid strain of the clear mash tower is less than or equal to 2g/L.
Optionally, the thick mash tower consists of 22 trays with the size of 1.8m and 10 trays with the size of 1m, the mash is fed from the 22 trays, the light components are distilled out from the top of the tower in an upward way, and the heavy components are discharged from the bottom of the thick mash tower in a downward way.
Optionally, the beer still comprises 22 trays of 2.2m and 4m350Y, the clear liquid is fed from 1 tray of 2.2m, the light component is distilled out from the top of the beer still in an upward way, and the heavy component is discharged from the bottom of the beer still in a downward way.
Optionally, the rectifying tower consists of 72 tower plates with the size of 2m, coarse wine is fed from 21 plates, light components such as wine gas and the like are upwards distilled from the top of the tower, heavy component BDO is downwards discharged from the rectifying tower kettle, and finished BDO is obtained through a membrane component mechanism.
Optionally, the membrane assembly mechanism comprises a raw material evaporator, a preheater, a membrane assembly, a permeate condenser, a vacuum condensing system and a finished product condenser, wherein the vacuum condensing system comprises a vacuum unit and a vacuum buffer tank.
Optionally, the membrane component adopts molecular sieve as membrane layer material.
Optionally, in the dehydration process of the inorganic membrane in the membrane module, the water-containing BDO enters the feed side of the membrane module after being preheated, and the permeation side maintains a low-pressure environment within 2000pa of absolute pressure in a vacuumizing mode.
Compared with the prior art, the invention has the beneficial effects that: the BDO concentration system is simple and reasonable in structural design, and through the arrangement of the thick mash tower, the mash cleaning tower, the crude wine tank and the membrane assembly mechanism which are matched in sequence, traditional distillation and inorganic membrane are organically combined to concentrate BDO, so that the problem of difficulty in BDO concentration in the existing production process is solved, the by-product BDO is good in concentration effect and easy to decompose, and the BDO concentration system can greatly meet the BDO requirements of daily chemicals industry.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the detailed operation flow of the present invention.
In the figure: 1 thick mash tower, 2 clear mash tower, 3 crude wine tank, 4 rectifying tower, 5 preheater, 6 evaporator, 7 membrane module, 8 finished product condenser, 9 permeate condenser, 10 vacuum unit, 11 vacuum buffer tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Examples:
fig. 1 is a schematic structural diagram of the present invention, fig. 2 is a detailed operation flow diagram of the present invention, please refer to fig. 1-2, and the present invention provides a technical scheme: a BDO concentration system comprises a thick mash tower 1, a clear mash tower 2, a rectifying tower 4 and a membrane component mechanism, wherein the thick mash tower 1 is connected with the rectifying tower 4, the clear mash tower 2 is connected with the rectifying tower 4, and the rectifying tower 4 is connected with the membrane component mechanism. Wherein, part of the strain concentration high-concentration mash is conveyed to a thick mash tower 1, the other part of strain concentration low-concentration clear liquid is conveyed to a clear mash tower 2, the thick mash tower works under negative pressure, the clear mash tower works under normal pressure, the rectifying tower works under pressurization, and the membrane component works under low pressure;
the thick mash tower separates crude alcohol in thick mash from bacterial protein solution, the crude alcohol is sent to the rectifying tower 4 to separate BDO from ethanol, the bacterial protein solution is sent to a protein section for centrifugal separation, and supernatant fluid absorbs water through a membrane component, and the bacterial protein solution at the lower layer is used for preparing protein powder; the fermented mash is preheated to about 50 ℃ by a thick mash preheater which is removed by a flowmeter, and is conveyed to a thick mash tower 1 by a feed pump, coarse alcohol gas with 65 ℃ is discharged from above a stripping section in the thick mash tower 1, and is condensed and then pumped to a coarse wine tank 3 by the thick mash tower.
The clear mash tower 2 separates crude alcohol in clear mash from vinasse solution, the vinasse solution is sent to a fermentation and recycling tower, and the crude alcohol is sent to a rectifying tower 4 to separate BDO from alcohol; the fermentation clear liquid is pumped to a clear mash tower 2 by a feed pump, crude ethanol generated by condensing wine gas at the top of the clear mash tower 2 is sent to a crude wine tank 3, and tower bottom liquid is sent to a vinasse clarifying tank for fermentation recycling; the raw wine in the raw wine tank 3 is fed to the rectifying tower 4 from the 21 layers of trays by a raw wine pump.
The rectifying tower 4 is used for further separating crude alcohol distilled from the thick mash tower and the clear mash tower and supernatant after centrifugation, and wine steam is sent to an alcohol storage tank from the top, and tower bottom BDO contains a small amount of water; condensing the tower top alcohol vapor of the rectifying tower 4, then carrying out adsorption dehydration through a molecular sieve adsorption tower in an adsorption state, then delivering the tower bottom liquid containing BDO to a finished product ethanol storage tank, and discharging the tower bottom liquid containing BDO at the bottom of the rectifying tower 4; and the BDO finished product enters the membrane component preheater 5 through an inorganic membrane finished product outlet for heat exchange, and is condensed through a finished product condenser to collect finished BDO.
The membrane component mechanism is a process of absorbing water by a membrane component through the tower bottom BDO of the rectifying tower and the protein centrifugal clear liquid to obtain a finished BDO product.
The fermented mash is conveyed to a thick mash tower 1 by a feed pump, crude ethanol is produced by condensing alcohol vapor at the top of the thick mash tower 1 and is conveyed to a crude wine tank 3, tower bottom liquid is conveyed to a protein section for centrifugation, supernatant liquid is conveyed to a membrane component 7, and protein powder is produced by drying the centrifuged thallus protein; the fermentation clear liquid is pumped to a clear mash tower 2 by a feed pump, crude ethanol generated by condensing wine gas at the top of the clear mash tower 2 is sent to a crude wine tank 3, and tower bottom liquid is sent to a vinasse clarifying tank for fermentation recycling; feeding the crude wine in the crude wine tank 3 to a rectifying tower 4 from a layer 21 tower plate through a crude wine pump, condensing the wine gas at the top of the rectifying tower 4, adsorbing and dehydrating the condensed wine gas by a molecular sieve adsorption tower in an adsorption state, then delivering the condensed wine gas to a finished product ethanol storage tank, and discharging tower bottom liquid containing BDO at the bottom of the rectifying tower 4; the supernatant and the protein centrifugal liquid are pumped to the membrane module preheater 5 through BDO feeding pump, are gasified in the membrane module evaporator 6 and then are sent to the feeding side of the inorganic membrane, and the permeation side maintains a low-pressure environment (within 2000pa absolute pressure) in a vacuumizing mode. On the feed side, water molecules are preferentially adsorbed on the surface of the membrane, permeate the membrane under the pushing of the partial pressure difference of water vapor on the two sides of the membrane, and are gasified into water vapor on the permeation side of the membrane. After separation operation, the outlet on the membrane feeding side obtains a concentrated BDO finished product, the BDO finished product enters the membrane component preheater 5 through the inorganic membrane finished product outlet for heat exchange, the finished product BDO is collected after condensation through the finished product condenser, and the permeate side component is treated with decontaminated water after condensation.
Through setting up thick mash tower 1, clear mash tower 2, crude wine jar 3 and membrane module mechanism that cooperates in proper order, with traditional distillation and inorganic membrane organic combination concentrated BDO, solved the concentrated difficult problem of BDO in the current production process, can make the concentrated effectual of accessory substance BDO, should decompose, the application of the invention can be very big satisfies daily chemicals trade's demand to BDO.
Optionally, the thick mash tower 1 is connected with a mash main pipe of an upstream fermentation section, is connected with a downstream protein section, and the clear mash tower 2 is connected with a clear liquid main pipe of the upstream fermentation section.
Optionally, the concentration OD range of the strain in the mash fed into the thick mash tower 1 is more than or equal to 20g/L, and the concentration OD range of the strain in the clear liquid fed into the clear mash tower 2 is less than or equal to 2g/L.
Optionally, the thick mash tower 1 consists of 22 trays of 1.8m and 10 trays of 1m, the mash is fed from the 22 trays, the light components are distilled out from the top of the tower in an upward way, and the heavy components are discharged from the thick mash tower kettle in a downward way.
Optionally, the beer still 2 consists of 22 trays of 2.2m and 4m350Y, the clear liquid is fed from 1 tray of 2.2m, the light component is distilled out from the top of the beer still while the heavy component is discharged from the bottom of the beer still while the heavy component is distilled out.
Optionally, the rectifying tower 4 is composed of 72 tower plates with the size of 2m, raw wine is fed from 21 plates, light components such as wine gas and the like are upwards distilled from the top of the tower, heavy component BDO is downwards discharged from the rectifying tower kettle, and finished BDO is obtained through a membrane component mechanism.
Optionally, the membrane assembly mechanism comprises a raw material evaporator 6, a preheater 5, a membrane assembly 7, a permeate condenser 9, a vacuum condensing system and a finished product condenser 8, wherein the vacuum condensing system comprises a vacuum unit 10 and a vacuum buffer tank 11. The downstream side of the membrane adopts a mode of vacuumizing and condensing to recycle condensed permeate (mainly water), and BDO is gradually dehydrated through membrane components connected in series.
Optionally, the membrane module 7 uses molecular sieve as a membrane layer material. Molecular sieve is adopted as a membrane layer material (core separation membrane layer), the separation of molecular sizes among different components is realized by utilizing regular pore channels of the molecular sieve, an inorganic membrane forms a layer of tightly stacked membrane layer by the growth of A-type molecular sieve crystals on a tubular ceramic porous support, the pore diameter is about 4.1A, and the pore diameter is larger than the kinetic diameter (2.9A) of water molecules and smaller than the molecular diameter of most organic solvents, so that the molecular sieve has good shape selectivity to the water molecules; on the other hand, the silicon-aluminum content (Si/al=1) in the molecular sieve framework makes it extremely hydrophilic, making the inorganic membrane particularly suitable for organic solvent dehydration.
Optionally, in the dehydration process of the inorganic membrane in the membrane module 7, the water-containing BDO enters the feed side of the membrane module after being preheated, and the permeate side maintains a low-pressure environment within 2000pa of absolute pressure by adopting a vacuumizing mode. On the feed side of the membrane module 7, water molecules are preferentially adsorbed on the surface of the membrane, permeate the membrane under the pushing of the partial pressure difference of the water vapor on the two sides of the membrane, and are gasified into the water vapor on the permeation side of the membrane. After separation operation, the outlet on the membrane feeding side obtains a concentrated BDO finished product, the BDO finished product enters the membrane component preheater 5 through the inorganic membrane finished product outlet for heat exchange, the finished product BDO is collected after condensation through the finished product condenser, and the permeate side component is treated with decontaminated water after condensation.
The BDO concentration system comprises the steps that firstly, fermented mash is preheated to about 50 ℃ by a thick mash preheater which is removed by a flowmeter, the fermented mash is conveyed to a thick mash tower 1 by a feed pump, coarse alcohol gas with the temperature of 65 ℃ is discharged from above a stripping section in the thick mash tower 1, the coarse alcohol gas is condensed and then is pumped to a coarse alcohol tank 3 by the thick mash tower, tower bottom liquid is conveyed to a protein section, and supernatant liquid is conveyed to a membrane component after being centrifuged by a centrifuge, and protein powder is prepared from the centrifuged thallus protein;
the fermentation clear liquid is preheated to about 90 ℃ by a beer still preheater and then is pumped to a feeding plate at the upper middle part of a beer still 2 by a beer still feeding pump, a remote flow meter is arranged between the beer still feeding pump and the beer still 2, the feeding amount is determined by the remote flow meter, part of crude ethanol generated by condensing the wine gas at the top of the beer still 2 flows back to the top of the tower through a reflux flow meter, most of the crude ethanol is sent to a crude wine tank 3 through a conveying flow meter, and the tower bottom liquid is sent to a wine lees clarifying tank for fermentation recycling;
the crude wine in the crude wine tank 3 is preheated by a crude wine pump through a crude ethanol preheater and then fed into the rectifying tower 4 from a layer of tower plates, the crude wine tank is provided with a liquid level controller and an automatic valve to form linkage control on the liquid level of the crude wine tank, and the rectifying tower 4 is provided with a liquid level controller and an automatic valve to form linkage, so that the stability of residual distilled water in the tower kettle is maintained. The concentration of the tower top of the rectifying tower 4 is more than 95.5% (v/v) wine vapor is heated by a heater, then is adsorbed and dehydrated by a molecular sieve adsorption tower in an adsorption state from top to bottom, the dehydrated ethanol vapor is condensed and enters an ethanol storage tank, tower bottom liquid containing BDO and protein centrifugate are sent to a preheater 5 by a crude BDO feeding pump to be preheated to 40 ℃, then enter an evaporator 6 to be evaporated to 120 ℃, and are sent to a membrane component 7, gasified by the evaporator 6 and then sent to an inorganic membrane feeding side, and a low-pressure environment (within 2000pa absolute pressure) is maintained on a permeation side by adopting a vacuumizing mode. On the feed side, water molecules are preferentially adsorbed on the surface of the membrane, permeate the membrane under the pushing of the partial pressure difference of water vapor on the two sides of the membrane, and are gasified into water vapor on the permeation side of the membrane. After separation operation, the outlet on the membrane feeding side obtains a concentrated BDO finished product, the BDO finished product enters the membrane component preheater 5 through the inorganic membrane finished product outlet to exchange heat, and is condensed through the finished product condenser 8 to collect finished product BDO, and the vapor on the permeation side is cooled and treated by decontaminated water through the vacuum buffer tank 11.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. The BDO concentration system comprises a thick mash tower (1), a clear mash tower (2), a rectifying tower (4) and a membrane component mechanism, and is characterized in that: the thick mash tower (1) is connected with the rectifying tower (4), the clean mash tower (2) is connected with the rectifying tower (4), the rectifying tower (4) is connected with the membrane component mechanism, one part of strain concentration high mash is conveyed to the thick mash tower (1), the other part of strain concentration low supernatant is conveyed to the clean mash tower (2), the thick mash tower works under negative pressure, the clean mash tower works under normal pressure, the rectifying tower works under pressure, and the membrane component works under low pressure;
the thick mash tower separates crude alcohol in thick mash from thallus protein solution, the crude alcohol is sent to a rectifying tower (4) to separate BDO from ethanol, the thallus protein solution is sent to a protein section for centrifugal separation, and supernatant fluid absorbs water through a membrane component, and the thallus protein solution at the lower layer is used for preparing protein powder;
the beer cleaning tower (2) separates crude alcohol in beer cleaning liquid from a vinasse solution, the vinasse solution is sent to a fermentation and recycling tower, and the crude alcohol is sent to a rectifying tower (4) to separate BDO from alcohol;
the rectifying tower (4) is used for further separating crude alcohol distilled from the thick mash tower and the clear mash tower and supernatant after centrifugation, and the wine steam is sent to an alcohol storage tank from the top, and tower bottom BDO contains a small amount of water;
the membrane component mechanism is a process of absorbing water by a membrane component through the tower bottom BDO of the rectifying tower and the protein centrifugal clear liquid to obtain a finished BDO product.
2. A BDO concentration system according to claim 1 wherein: the thick mash tower (1) is connected with a mash main pipe of an upstream fermentation working section, is connected with a downstream protein working section, and the clear mash tower (2) is connected with a clear liquid main pipe of the upstream fermentation working section.
3. A BDO concentration system according to claim 1 wherein: the concentration OD range of the strain in the mash fed into the thick mash tower (1) is more than or equal to 20g/L, and the concentration OD range of the strain in the clear liquid fed into the clear mash tower (2) is less than or equal to 2g/L.
4. A BDO concentration system according to claim 1, wherein the thick mash tower (1) consists of 22 trays of 1.8m and 10 trays of 1m, the mash is fed from 22 trays, the light fraction is distilled out from the top of the tower by upward travel, and the heavy fraction is discharged from the thick mash tower bottom by downward travel.
5. A BDO concentration system according to claim 1 wherein the beer still (2) consists of 22 trays of 2.2m and 4m350Y, the clear liquid is fed from 1 tray of 2.2m, the light fraction is distilled off from the top of the column with the heavy fraction being discharged from the bottom of the beer still with the heavy fraction being taken down.
6. A BDO concentration system according to claim 1, wherein the rectifying tower (4) is composed of 72 trays of 2m, raw wine is fed from 21 trays, light components such as wine gas and the like are distilled out from the top of the tower upwards, heavy component BDO is discharged from the rectifying tower kettle downwards, and finished BDO is obtained through a membrane assembly mechanism.
7. A BDO concentration system according to claim 1, wherein the membrane assembly mechanism is comprised of a feed evaporator (6), a preheater (5), a membrane assembly (7), a permeate condenser (9), a vacuum condensing system and a finished product condenser (8), the vacuum condensing system comprising a vacuum train (10) and a vacuum buffer tank (11).
8. An inorganic membrane in a BDO concentrate system according to claim 7, wherein said membrane module (7) employs molecular sieve as membrane layer material.
9. An inorganic membrane in a BDO concentrate system according to claim 7, wherein during dehydration of the inorganic membrane in the membrane module (7), the aqueous BDO is preheated and enters the feed side of the membrane module, and the permeate side is evacuated to maintain a low pressure environment within 2000 pa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310835115.1A CN116808617A (en) | 2023-07-10 | 2023-07-10 | BDO concentration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310835115.1A CN116808617A (en) | 2023-07-10 | 2023-07-10 | BDO concentration system |
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| Publication Number | Publication Date |
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| CN116808617A true CN116808617A (en) | 2023-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310835115.1A Pending CN116808617A (en) | 2023-07-10 | 2023-07-10 | BDO concentration system |
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| CN (1) | CN116808617A (en) |
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2023
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