CN212998455U - Three-tower distillation system for producing anhydrous ethanol - Google Patents
Three-tower distillation system for producing anhydrous ethanol Download PDFInfo
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- CN212998455U CN212998455U CN202021775103.2U CN202021775103U CN212998455U CN 212998455 U CN212998455 U CN 212998455U CN 202021775103 U CN202021775103 U CN 202021775103U CN 212998455 U CN212998455 U CN 212998455U
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Abstract
The utility model provides a three-tower distillation system for absolute ethyl alcohol production for distilling mature fermented glutinous rice, which comprises a glutinous rice tower, a combined tower and a rectifying tower, wherein the glutinous rice tower is used for degassing the mature fermented glutinous rice entering the tower to obtain degassed glutinous rice and removing aldehyde from the degassed glutinous rice to obtain crude alcohol; the combined tower carries out positive pressure rough distillation on the degassed mash entering the tower to obtain alcohol steam with the alcohol content of more than 95 percent; the rectifying tower is used for extracting and rectifying fusel from crude alcohol entering the rectifying tower, and dehydrating the crude alcohol through a molecular sieve to obtain absolute ethyl alcohol with the alcohol content of more than 99.5 percent, and the rectifying tower is heated by heat exchange of steam in a steam header pipe through a reboiler by adopting a double-crude-tower triple-effect thermal coupling distillation technology; meanwhile, through the matching of the reboiler and the heat exchanger, the alcohol steam heat supply combined tower is arranged at the top of the rectifying tower, and the alcohol steam heat supply mash tower is arranged at the top of the combined tower, so that the energy is fully recycled, and the energy consumption in the ethanol distillation process is greatly reduced.
Description
Technical Field
The utility model relates to a fuel ethanol makes the field, especially relates to a three-tower distillation system of anhydrous alcohol production.
Background
With the energy saving and emission reduction becoming the mainstream environmental-friendly mouth number in the world, the ethanol gasoline is gradually used for replacing the traditional gasoline, the ethanol gasoline is a new generation clean and environmental-friendly vehicle fuel which is prepared by adding a certain proportion of denatured fuel ethanol into special gasoline component oil without MTBE oxygen-containing additive according to the volume ratio and mixing the denatured fuel ethanol by a vehicle ethanol gasoline fixed-point blending center according to the quality requirement of national standard GB18351-2004 through a specific process. The development of ethanol fuel is promoted by adjusting the energy structure and reducing the environmental pollution. In the current process for preparing ethanol by grains, the prepared ethanol has low purity and high energy consumption.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is in present grain preparation ethanol technology, the ethanol purity of making is lower, and the energy consumption is great, the utility model provides a three-tower distillation system of absolute ethyl alcohol production solves above-mentioned problem.
The utility model provides a technical scheme that its technical problem adopted is: a three-tower distillation system for producing absolute ethyl alcohol is used for distilling fermented mature mash and comprises a mash tower, a combined tower and a rectifying tower, wherein the mash tower, the combined tower and the rectifying tower are all connected with a reboiler for providing heat required by distillation, the fermented mature mash is gradually distilled through the mash tower, the combined tower and the rectifying tower, the mash tower is used for degassing the fermented mature mash entering the tower to obtain degassed mash, and the degassed mash is subjected to aldehyde removal to obtain crude alcohol; the combined tower carries out positive pressure rough distillation on the degassed mash entering the tower to obtain alcohol steam with the alcohol content of more than 95 percent; the rectifying tower is used for extracting and rectifying fusel from the crude alcohol entering the rectifying tower, and the dehydrated alcohol with the alcohol content of more than 99.5 percent is obtained by dehydrating through a molecular sieve.
Further: the mash tower is in a negative pressure state, a dealdehyding part, a degassing part and a crude distillation part are sequentially arranged in the mash tower from top to bottom, the top of the degassing part is provided with a material inlet, and the bottom of the degassing part is communicated with the top of the crude distillation part through a self-flowing pipe; a first feed pump is arranged between the degassing part and the combined tower, and pumps the fermented mash degassed by the degassing part into the combined tower; a first liquid outlet is formed in the bottom of the rough distillation part; the top of the degassing part is provided with a first gas outlet, the mash tower is also provided with a first heat exchanger, a second heat exchanger and a mash tower reflux tank, the tube side of the first heat exchanger is connected with the material inlet and the tube side outlet of the second heat exchanger, the tube side inlet of the second heat exchanger is connected with a fermented mash feeding pump, and the shell side of the first heat exchanger is respectively connected with the first gas outlet and the inlet of the mash tower reflux tank.
Further: the top of the crude distillation part is provided with a second gas outlet, and the bottom of the aldehyde removal part is provided with a third gas inlet communicated with the second gas outlet; and a third liquid outlet is formed in the middle of the aldehyde removing part, a third gas outlet is formed in the top of the aldehyde removing part, and the shell pass of the second heat exchanger is respectively connected with the third gas outlet and an inlet of the mash tower reflux tank.
Further: the reboiler comprises a mash tower reboiler, a combined tower reboiler and a fine tower reboiler, the three-tower distillation system is also provided with a first preheater, a second preheater and a combined tower reflux tank, the combined tower is provided with a fourth air inlet and a fourth liquid inlet, the tube side of the first preheater is respectively connected with the tube side inlets of the first feed pump and the second preheater, the tube side outlet of the second preheater is communicated with the fourth liquid inlet, the top of the combined tower is provided with a fourth air outlet, the fourth air outlet is communicated with the inlet of the mash tower reboiler, the outlet of the mash tower reboiler is connected with the combined tower reflux tank, the liquid outlet of the combined tower reflux tank is communicated with the combined tower through a combined tower reflux pump, and the mash tower reboiler can heat the mash tower; and a fourth liquid outlet is formed in the bottom of the combined tower.
Further: and the fourth liquid outlet is communicated with a shell pass inlet of the second preheater through a combined tower vinasse pump, and a shell pass outlet of the second preheater is communicated with the rough distillation part.
Further: the three-tower distillation system also comprises an auxiliary tower and a crude wine preheater, wherein the tube side of the crude wine preheater is respectively connected with the third liquid outlet and the liquid inlet of the auxiliary tower; a fifth air outlet is formed in the top of the auxiliary tower and connected with the fourth air inlet; and a fifth liquid outlet is formed in a tower kettle of the auxiliary tower and connected with a rectifying tower feeding pump.
Further: the rectifying tower is provided with a sixth liquid inlet, a rectifying tower preheater is arranged between the sixth liquid inlet and a rectifying tower feed pump, the tube side of the rectifying tower preheater is respectively connected with the sixth liquid inlet and the outlet of the rectifying tower feed pump, a fusel oil liquid outlet is arranged on the rectifying tower, a sixth gas outlet is arranged at the top of the rectifying tower, and the sixth gas outlet is connected with the molecular sieve.
Further: the sixth gas outlet with the import of combined column reboiler is linked together, the exit linkage of combined column reboiler has rectifying column reflux tank, the inlet of rectifying column reflux tank is connected the liquid outlet of combined column reflux tank, the liquid outlet of rectifying column reflux tank pass through rectifying column reflux pump with the rectifying column is linked together.
Further: the fine tower reboiler is connected with a steam main pipe, the steam main pipe provides steam with heat required by distillation, and the auxiliary tower is provided with an auxiliary tower reboiler.
Furthermore, a liquid level controller and an alarm are arranged at the bottom of the mash tower, the bottom of the combined tower, the bottom of the auxiliary tower and the bottom of the rectifying tower, the liquid level controller is electrically connected with the alarm, and the alarm can receive signals of the liquid level controller and send an alarm.
The beneficial effects of the utility model are that, the utility model discloses three tower distillation systems of anhydrous alcohol production pass through the beer column, the combination tower, the cooperation of rectifying column and molecular sieve, prepare out the anhydrous alcohol more than 99.5% of wine, adopt two thick tower triple effect thermal coupling distillation techniques, steam in the steam header pipe comes to heat the rectifying column through the reboiler heat transfer, the cooperation through reboiler and heat exchanger simultaneously, rectifying column tower top alcohol steam heat supply combination tower, combination tower top alcohol steam heat supply beer column, make the energy fully obtain recycling, greatly reduced the energy resource consumption in the ethanol distillation.
Drawings
The present invention will be further explained with reference to the drawings and examples.
FIG. 1 is a process flow diagram of a three-column distillation system for absolute ethanol production according to the present invention;
FIG. 2 is a schematic of the construction of a beer column;
FIG. 3 is a schematic structural view of a combination column;
FIG. 4 is a schematic view of the structure of a rectifying column.
In the figure, 1, a mash tower, 2, a combined tower, 3, a rectifying tower, 4, a steam main pipe, 5, an auxiliary tower, 10, a material inlet, 11, a gravity pipe, 12, a first feeding pump, 13, a first liquid outlet, 14, a first gas outlet, 15, a first heat exchanger, 16, a second heat exchanger, 17, a mash tower reflux tank, 20, a second gas outlet, 21, a third gas inlet, 22, a third liquid outlet, 23, a third gas outlet, 24, a first preheater, 25, a second preheater, 26, a combined tower reflux tank, 30, a mash tower reboiler, 31, a combined tower reboiler, 32, a rectifying tower, 33, an auxiliary tower reboiler, 40, a fourth gas inlet, 41, a fourth liquid inlet, 42, a fourth gas outlet, 43, a fourth liquid outlet, 44, a combined tower distiller's grain pump, 50, a crude wine preheater, 51, a fifth gas outlet, 52, a fifth liquid outlet, 60, a rectifying tower feeding pump, 61. a sixth liquid inlet 62, a rectifying tower preheater 63, a fusel oil liquid outlet 64, a sixth gas outlet 65 and a rectifying tower reflux tank.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.
As shown in fig. 1, the utility model provides a three-tower distillation system for absolute ethyl alcohol production for distilling the fermented mature mash, including mash tower 1, combination tower 2 and rectifying column 3, mash tower 1, combination tower 2 and rectifying column 3 all are connected with the reboiler that is used for providing the required heat of distillation, and the fermented mature mash passes through mash tower 1, combination tower 2 and rectifying column 3 are distilled gradually, mash tower 1 degasses the fermented mash that enters into the tower and obtains the degasification mash, and removes aldehyde to the degasification mash and obtain crude alcohol; the combined tower 2 carries out positive pressure rough distillation on the degassed mash entering the tower to obtain alcohol steam with the alcohol content of more than 95 percent; the rectifying tower 3 is used for extracting and rectifying fusel alcohol from the crude alcohol entering the tower, and dehydrating the fusel alcohol through a molecular sieve to obtain absolute ethyl alcohol with the alcohol content of more than 99.5 percent.
Referring to fig. 2, 3 and 4, the beer still 1 is in a negative pressure state, the beer still 1 is sequentially provided with an aldehyde removal part, a degassing part and a crude distillation part from top to bottom, the top of the degassing part is provided with a material inlet 10, and the bottom of the degassing part is communicated with the top of the crude distillation part through a gravity flow pipe 11; a first feed pump 12 is arranged between the degassing part and the combined tower 2, and the first feed pump 12 pumps the fermented mash degassed by the degassing part into the combined tower 2; a first liquid outlet 13 is formed in the bottom of the rough distillation part; the top of the degassing part is provided with a first gas outlet 14, the mash tower 1 is also provided with a first heat exchanger 15, a second heat exchanger 16 and a mash tower reflux tank 17, the tube side of the first heat exchanger 15 is connected with the material inlet 10 and the tube side outlet of the second heat exchanger 16, the tube side inlet of the second heat exchanger 16 is connected with a fermented mash feeding pump, and the shell side of the first heat exchanger 15 is respectively connected with the first gas outlet 14 and the inlet of the mash tower reflux tank 17.
The fermented mash feeding pump pumps the fermented mash into the mash tower 1, the fermented mash flows through the second heat exchanger 16 and the first heat exchanger 15 and enters a degassing part of the mash tower 1 from the material inlet 10, carbon dioxide, volatile acids and low-boiling-point impurities in the fermented mash after entering the tower are separated from the fermented mash under the action of negative pressure to form steam, the steam rises in the degassing part and is discharged from the first air outlet 14, and the steam flows through the first heat exchanger 15 to heat the fermented mash and then is condensed into condensate liquid to flow into a mash tower reflux tank 17; the degassed fermented mash is degassed mash, part of the degassed mash is pumped into a combined tower 2 through a first feeding pump 12, the rest degassed mash flows into a rough distillation part through a self-flowing pipe 11 and descends, meanwhile, the degassed mash is heated by steam rising from the bottom of the tower, wine steam ascends and is separated from waste mash to form wine steam containing alcohol and waste mash without alcohol content, and the waste mash is discharged from a first liquid outlet 13.
The top of the crude distillation part is provided with a second gas outlet 20, and the bottom of the aldehyde removal part is provided with a third gas inlet 21 communicated with the second gas outlet 20; a third liquid outlet 22 is arranged in the middle of the aldehyde removing part, a third gas outlet 23 is arranged at the top of the aldehyde removing part, and the shell pass of the second heat exchanger 16 is respectively connected with the third gas outlet 23 and the inlet of the mash tower reflux tank 17.
The wine vapor goes upward to enter an aldehyde discharging section for aldehyde removal treatment to obtain aldehyde-removed crude alcohol, and the aldehyde-removed crude alcohol is discharged from a third liquid outlet 22; the alcohol vapor of higher concentration containing volatile acids and low boiling impurities is discharged from the third gas outlet 23, passes through the second heat exchanger 16 to heat the beer and is condensed into condensate to flow into the beer column reflux drum 17.
The reboilers include a beer column reboiler 30, a combined column reboiler 31 and a fine column reboiler 32, the three-column distillation system is also provided with a first preheater 24, a second preheater 25 and a combined column reflux drum 26, a fourth air inlet 40 and a fourth liquid inlet 41 are arranged on the combined tower 2, the tube side of the first preheater 24 is respectively connected with the tube side inlets of the first feed pump 12 and the second preheater 25, the tube pass outlet of the second preheater 25 is communicated with the fourth liquid inlet 41, the top of the combined tower 2 is provided with a fourth air outlet 42, the fourth gas outlet 42 is communicated with the inlet of the beer column reboiler 30, the outlet of the beer column reboiler 30 is connected with the combined column reflux tank 26, the liquid outlet of the combined tower reflux tank 26 is communicated with the combined tower 2 through a combined tower reflux pump, and the mash tower reboiler 30 can heat the mash tower 1; and a fourth liquid outlet 43 is formed at the bottom of the combined tower 2.
Part of degassed mash is pumped into the combined tower 2 through a first feeding pump 12, enters the combined tower 2 from a fourth liquid inlet 41 after being preheated by a first preheater 24 and a second preheater 25, descends in the combined tower 2 and is heated by rising steam to form separated ascending wine steam and waste mash without alcohol content, and the waste mash is discharged from a fourth liquid outlet 43; the wine vapor goes upward to enter a concentration section of the combined tower, and the wine vapor is gradually concentrated until the alcohol concentration of the wine vapor at the tower top reaches more than 95 percent; wine vapor enters the mash tower reboiler 30 through the fourth air outlet 42 to be condensed into condensate, the condensate flows into the combined tower reflux tank 26, the combined tower reflux pump pumps the condensate in the combined tower reflux tank 26 into the combined tower 2, and simultaneously the mash tower reboiler 30 heats the mash tower 1.
The fourth liquid outlet 43 is communicated with the shell side inlet of the second preheater 25 through a combined tower vinasse pump 44, the combined tower vinasse pump 44 pumps the waste mash of the fourth liquid outlet 43 into the second preheater 25, and the shell side outlet of the second preheater 25 is communicated with the crude distillation part.
The combined tower distillers' grains pump 44 pumps the waste mash from the fourth outlet 43 to the second preheater 25, the waste mash preheats the degassed mash in the second preheater 25, and then the waste mash is discharged to the rough distillation part of the mash tower 1 for flash evaporation, and the flash evaporation steam is used as part of the heat source of the mash tower 1.
The three-tower distillation system further comprises an auxiliary tower 5 and a crude wine preheater 50, wherein the tube side of the crude wine preheater 50 is respectively connected with the third liquid outlet 22 and the liquid inlet of the auxiliary tower 5; a fifth air outlet 51 is arranged at the top of the auxiliary tower 5, and the fifth air outlet 51 is connected with the fourth air inlet 40; a fifth liquid outlet 52 is arranged at the bottom of the auxiliary tower 5, and the fifth liquid outlet 52 is connected with a rectifying tower feed pump 60.
Crude alcohol discharged from the dealdehyding part of the mash tower 1 enters the top of the auxiliary tower 5 after being preheated by the crude alcohol preheater 50, part of alcohol steam ascends to enter the combined tower 2 through the fifth gas outlet 51, and the rest of the crude alcohol enters the tower kettle of the auxiliary tower 5 and is pumped to the rectifying tower 3 through the feeding pump 60 of the rectifying tower.
Be equipped with sixth inlet 61 on rectifying column 3, sixth inlet 61 with be provided with rectifying column preheater 62 between rectifying column charge pump 60, rectifying column preheater 62's tube side is connected respectively sixth inlet 61 with rectifying column charge pump 60's export, be provided with fusel oil liquid outlet 63 on rectifying column 3, rectifying column 3's top is provided with sixth gas outlet 64, sixth gas outlet 64 is connected the molecular sieve dehydration layer.
The crude alcohol enters the rectifying tower 3 after being heated by a rectifying tower preheater 62, while gradually concentrating, low boiling point impurities such as methanol and the like rise to the top of the tower along with alcohol steam, and light wine containing fusel oil flows out of a fusel oil outlet 63, is cooled by a cooler and then is sent to a separator to separate the fusel oil; collecting alcohol vapor with alcohol content of 95% or more from sixth gas outlet 64, removing water from molecular sieve dehydration layer to obtain anhydrous alcohol with alcohol content of 99.5 or more.
Part of the alcohol vapor discharged from the sixth gas outlet 64 enters the combined tower reboiler 31 to heat the combined tower 2, is condensed into condensate and flows back to the rectifying tower reflux tank 65, and meanwhile, part of the condensate in the combined tower reflux tank 26 enters the rectifying tower reflux tank 65 and is pumped into the rectifying tower 3 through the rectifying tower reflux pump.
The refined tower reboiler 32 is connected with a steam main 4, the steam main 4 provides steam with heat required by distillation, and the auxiliary tower 5 is provided with an auxiliary tower reboiler 33. The heating mode of the rectifying tower 3 is to heat the rectifying tower 3 by introducing steam of a steam main pipe into a rectifying tower reboiler 32 for heat exchange, and the heating mode of the auxiliary tower 5 is to heat through an auxiliary tower reboiler 33.
The bottom of the mash tower 1, the bottom of the combined tower 2, the bottom of the auxiliary tower 5 and the bottom of the rectifying tower 3 are respectively provided with a liquid level controller and an alarm, the liquid level controller is electrically connected with the alarm, and the alarm can receive signals of the liquid level controller and send an alarm. Through the liquid level controller can maintain the invariable liquid level at the bottom of the tower, when the liquid level at the bottom of the tower surpassed and predetermine the liquid level, the alarm can accept the signal of liquid level controller and send out the police dispatch newspaper, be convenient for in time discover and handle unusual problem, liquid level controller and alarm are the well-known product among the prior art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic representation of the term does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (10)
1. A three-tower distillation system for producing absolute ethyl alcohol is used for distilling fermented mature mash, and comprises a mash tower, a combined tower and a rectifying tower, and is characterized in that: the mash tower, the combined tower and the rectifying tower are all connected with reboilers for providing heat required by distillation, the fermented mash is gradually distilled through the mash tower, the combined tower and the rectifying tower,
the mash tower is used for degassing fermented mash entering the tower to obtain degassed mash, and the degassed mash is subjected to dealdehydizing to obtain crude alcohol;
the combined tower carries out positive pressure rough distillation on the degassed mash entering the tower to obtain alcohol steam with the alcohol content of more than 95 percent;
the rectifying tower is used for extracting and rectifying fusel from the crude alcohol entering the rectifying tower, and the absolute ethyl alcohol with the alcohol content of more than 99.5 percent is obtained by dehydration through a molecular sieve.
2. The three-column distillation system for absolute ethanol production of claim 1, wherein: the mash tower is in a negative pressure state, a dealdehyding part, a degassing part and a crude distillation part are sequentially arranged in the mash tower from top to bottom, the top of the degassing part is provided with a material inlet, and the bottom of the degassing part is communicated with the top of the crude distillation part through a self-flowing pipe; a first feed pump is arranged between the degassing part and the combined tower, and pumps the fermented mash degassed by the degassing part into the combined tower; a first liquid outlet is formed in the bottom of the rough distillation part;
the top of the degassing part is provided with a first gas outlet, the mash tower is also provided with a first heat exchanger, a second heat exchanger and a mash tower reflux tank, the tube side of the first heat exchanger is connected with the material inlet and the tube side outlet of the second heat exchanger, the tube side inlet of the second heat exchanger is connected with a fermented mash feeding pump, and the shell side of the first heat exchanger is respectively connected with the first gas outlet and the inlet of the mash tower reflux tank.
3. The three-column distillation system for absolute ethanol production of claim 2, wherein: the top of the crude distillation part is provided with a second gas outlet, and the bottom of the aldehyde removal part is provided with a third gas inlet communicated with the second gas outlet; and a third liquid outlet is formed in the middle of the aldehyde removing part, a third gas outlet is formed in the top of the aldehyde removing part, and the shell pass of the second heat exchanger is respectively connected with the third gas outlet and an inlet of the mash tower reflux tank.
4. The three-column distillation system for absolute ethanol production of claim 3, wherein: the reboiler comprises a mash tower reboiler, a combined tower reboiler and a fine tower reboiler, the three-tower distillation system is also provided with a first preheater, a second preheater and a combined tower reflux tank, the combined tower is provided with a fourth air inlet and a fourth liquid inlet, the tube side of the first preheater is respectively connected with the tube side inlets of the first feed pump and the second preheater, the tube side outlet of the second preheater is communicated with the fourth liquid inlet, the top of the combined tower is provided with a fourth air outlet, the fourth air outlet is communicated with the inlet of the mash tower reboiler, the outlet of the mash tower reboiler is connected with the combined tower reflux tank, the liquid outlet of the combined tower reflux tank is communicated with the combined tower through a combined tower reflux pump, and the mash tower reboiler can heat the mash tower; and a fourth liquid outlet is formed in the bottom of the combined tower.
5. The three-column distillation system for absolute ethanol production of claim 4, wherein: and the fourth liquid outlet is communicated with a shell pass inlet of the second preheater through a combined tower vinasse pump, and a shell pass outlet of the second preheater is communicated with the rough distillation part.
6. The three-column distillation system for absolute ethanol production of claim 4, wherein: the three-tower distillation system also comprises an auxiliary tower and a crude wine preheater, wherein the tube side of the crude wine preheater is respectively connected with the third liquid outlet and the liquid inlet of the auxiliary tower; a fifth air outlet is formed in the top of the auxiliary tower and connected with the fourth air inlet; and a fifth liquid outlet is formed in a tower kettle of the auxiliary tower and connected with a rectifying tower feeding pump.
7. The three-column distillation system for absolute ethanol production of claim 6, wherein: the rectifying tower is provided with a sixth liquid inlet, a rectifying tower preheater is arranged between the sixth liquid inlet and a rectifying tower feed pump, the tube side of the rectifying tower preheater is respectively connected with the sixth liquid inlet and the outlet of the rectifying tower feed pump, a fusel oil liquid outlet is arranged on the rectifying tower, a sixth gas outlet is arranged at the top of the rectifying tower, and the sixth gas outlet is connected with the molecular sieve.
8. The three-column distillation system for absolute ethanol production of claim 7, wherein: the sixth gas outlet with the import of combined column reboiler is linked together, the exit linkage of combined column reboiler has rectifying column reflux tank, the inlet of rectifying column reflux tank is connected the liquid outlet of combined column reflux tank, the liquid outlet of rectifying column reflux tank pass through rectifying column reflux pump with the rectifying column is linked together.
9. The three-column distillation system for absolute ethanol production of claim 6, wherein: the fine tower reboiler is connected with a steam main pipe, the steam main pipe provides steam with heat required by distillation, and the auxiliary tower is provided with an auxiliary tower reboiler.
10. The three-column distillation system for absolute ethanol production of claim 6, wherein: the bottom of the mash tower, the bottom of the combined tower, the bottom of the auxiliary tower and the bottom of the rectifying tower are respectively provided with a liquid level controller and an alarm, the liquid level controllers are electrically connected with the alarms, and the alarms can receive signals of the liquid level controllers and give an alarm.
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| CN202021775103.2U CN212998455U (en) | 2020-08-23 | 2020-08-23 | Three-tower distillation system for producing anhydrous ethanol |
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| CN202021775103.2U CN212998455U (en) | 2020-08-23 | 2020-08-23 | Three-tower distillation system for producing anhydrous ethanol |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112741217A (en) * | 2019-10-30 | 2021-05-04 | 国投生物科技投资有限公司 | Fuel ethanol distillation dehydration device and preparation method of dried distillers' grain protein feed |
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2020
- 2020-08-23 CN CN202021775103.2U patent/CN212998455U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112741217A (en) * | 2019-10-30 | 2021-05-04 | 国投生物科技投资有限公司 | Fuel ethanol distillation dehydration device and preparation method of dried distillers' grain protein feed |
| CN112741217B (en) * | 2019-10-30 | 2022-12-20 | 国投生物科技投资有限公司 | Fuel ethanol distillation dehydration device and preparation method of distiller's dried grain protein feed |
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