CN102489030A - Three-tower energy-saving differential pressure alcohol distillation production system and technological process thereof - Google Patents
Three-tower energy-saving differential pressure alcohol distillation production system and technological process thereof Download PDFInfo
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- CN102489030A CN102489030A CN2011104035523A CN201110403552A CN102489030A CN 102489030 A CN102489030 A CN 102489030A CN 2011104035523 A CN2011104035523 A CN 2011104035523A CN 201110403552 A CN201110403552 A CN 201110403552A CN 102489030 A CN102489030 A CN 102489030A
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- 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
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
Abstract
The invention discloses a three-tower energy-saving differential pressure alcohol distillation production system and a technological process thereof. The three-tower energy-saving differential pressure alcohol distillation production system comprises a two-tower atmospheric distillation system formed by an existing mash tower, an atmospheric rectification tower and accessory equipment, and a pressurization rectification system formed by a pressurization rectification tower and accessory equipment. According to the invention, on the basis of the existing two-tower atmospheric distillation equipment, a pressurization rectification tower is additionally arranged, the operating pressure of the original two-tower is unchanged, the pressurization rectification tower is used for processing dilute alcohol from the bottom of the original atmospheric rectification tower, and the dilute alcohol accounts for 1/3 of the total output; and compared with the two-tower atmospheric distillation, the steam is saved by more than 20 percent, the cooling water is saved by more than 30 percent, the steam and water saving effect is obvious, the consumption of steam is greatly reduced, the production cost of enterprises is reduced, and the transformation cost of the enterprises is greatly reduced simultaneously.
Description
Technical field
The present invention relates to the alcohol distillation technology.
Background technology
Got into since 21 century, China's alcohol industry develop rapidly, society is also increasingly high with energy-saving and cost-reducing requirement to alcohol quality, and has carried out the new edible alcohol national standard of GB10343-2008.In order to adapt to the variation of these new situations, Alcohol Production enterprise transforms its distillation workshop section one after another.China Alcohol Production enterprise adopts traditional vapour phase to cross tower two tower air-distillation systems mostly.This system is made up of wine with dregs tower, atmospheric distillation tower and auxiliary device.
Because this technological equipment investment is few, operating cost is low, receives the favor of vast Alcohol Production enterprise for many years always.But because two tower air-distillation equipment adopt vapour phase to cross tower, the chance of despumation is few, adds that vapour phase directly communicates between tower and the tower; It is big to interact, and during any one tower fluctuation of service, alcohol quality is affected; Product percent of pass is low, and steam consumption is big.
At present; The employing multiple-effect thermal coupling distillation technique that has, though can reduce the energy consumption of distillation workshop section effectively, general alcohol multi-effect distilling arts demand carries out negative-pressure operation with topping still both at home and abroad at present; Rectifying column carries out pressurized operation; But the equipment of two tower air-distillations does not all meet the requirement of negative pressure and pressurized operation, and all devices all need be changed, and huge investment is hung back vast Alcohol Production producer.
Therefore, vast Alcohol Production enterprise is badly in need of undergoing technological transformation, and improves alcohol quality, cuts down the consumption of energy.
Summary of the invention
To above-mentioned present situation, the present invention improves on the basis of existing two tower air-distillation process equipments, has proposed the energy-conservation differential pressure alcohol distillation of a kind of three towers production system.
The present invention provides the technical process of this production system simultaneously.
For achieving the above object, the technical scheme of the energy-conservation differential pressure alcohol distillation of three towers of the present invention production system is following:
It comprises the two tower air-distillation systems that wine with dregs tower, atmospheric distillation tower and auxiliary device are formed; It is characterized in that; It also comprises the compression rectification system that is made up of compression rectification tower and pressurization auxiliary device; The pressurization auxiliary device comprises pressurizing tower feed pump, pressurizing tower reflux pump, pressurizing tower feed preheater, pressurizing tower reboiler, pressurizing tower steam generator and vapour liquid separator; Steam generator is vertical tubular heat exchanger, and its tube side is connected with vapour liquid separator, and its shell side is communicated with compression rectification column overhead wine steam pipe road; The faints pipeline of atmospheric distillation tower bottom is connected through pressurizing tower feed pump, pressurizing tower alcohol preheater and compression rectification tower charging aperture successively; The jet chimney of the steam inlet of compression rectification tower and pressurizing tower reboiler is connected; Compression rectification tower bottom wastewater outlet is connected with vapour liquid separator behind pressurizing tower alcohol preheater; The condensate outlet of steam generator is connected through pressurizing tower reflux pump and compression rectification top of tower return tank; The overhead vapor outlet of vapour liquid separator is connected with wine with dregs tower and atmospheric distillation tower steam inlet, and the reboiler of middle heat water out and atmospheric distillation tower is connected, and bottom wastewater outlet and pressurizing tower steam generator are connected.
Above-mentioned atmospheric distillation tower and compression rectification tower all are to produce alcohol rectifying column commonly used, and both are structurally as broad as long, just are called atmospheric distillation tower and compression rectification tower respectively according to the admission pressure difference.
The technical process of the energy-conservation differential pressure alcohol distillation of the three towers production system that the present invention proposes comprises three parts, is respectively: wine with dregs tower process process, atmospheric distillation tower process process and compression rectification tower process process, and detailed process is:
1, wine with dregs tower process process: from the fermentation workshop section ripe mash with being pumped into mash fume preheater tube side and mash vinasse preheater tube side; Get into the wine with dregs tower after the preheating and be divided into fume and vinasse, fume is discharged entering atmospheric distillation tower through the wine with dregs column overhead and is further separated; Vinasse at the bottom of the wine with dregs Tata, get into mash vinasse preheater shell side and karusen carries out heat exchange, remove vinasse pond and treatment and finishing section after the heat exchange;
2, atmospheric distillation tower process process: the fume from the wine with dregs column overhead separates into three parts through the normal pressure rectifying column, is respectively: cat head fume part, the semi-finished product alcohol of tower middle and upper part and the faints at the bottom of the tower; Wherein cat head fume is partly through after the heat exchange of atmospheric distillation tower preheater, the condenser condenses; Discharge behind the lower boiling head impurties such as eliminating aldehydes; The semi-finished product alcohol compression rectification tower of tower middle and upper part is further handled; Faints separated into two parts at the bottom of the tower, a part generates steam through normal pressure rectifying column reboiler and for the atmospheric distillation tower heat is provided; Another part is sent into the compression rectification tower through the heating of compression rectification tower preheater and is recycled;
3, compression rectification tower process process;
From atmospheric distillation tower bottom faints, get into the compression rectification tower together with the semi-finished product alcohol of middle and upper part and separate again, separate the back and take out finished product alcohol in the tower middle and upper part, take out fusel wet goods high-boiling-point impurity and intermediate impurity in the tower middle and lower part;
The compression rectification tower adopts 130 ℃ of steam directly to heat simultaneously, and the fume that the compression rectification column overhead is discharged discharges through the steam generator heat, contains the wine condensate pump and squeezes into the compression rectification top of tower; The waste water separated into two parts of discharging at the bottom of the compression rectification Tata, a part get into vapour liquid separator after the heat exchange of compression rectification tower alcohol heat exchanger, another part generates steam through compression rectification tower reboiler and for the compression rectification tower heat is provided;
Get into the waste water separated into two parts of vapour liquid separator, a part of hot water gets into atmospheric distillation tower reboiler and for it heat is provided, and discharges trench after the heat exchange, and it is that atmospheric distillation tower and wine with dregs tower provide heat that another part hot water gets into steam generator generation steam.
Process of the present invention and production system energy-conservation is through after reducing wine with dregs tower operating temperature, reducing the atmospheric distillation tower and reflux, and gives wine with dregs tower and atmospheric distillation tower through steam generator with compression rectification column overhead fume heat reasonable distribution; Waste water is also stayed package unit inside through relevant heat transmission equipment with the heat maximization at the bottom of the compression rectification Tata, thereby realizes the purpose of energy saving of system.
Energy-conservation principle is:
1, on the basis of existing two tower air-distillation equipment, increase a compression rectification tower, former two tower operating pressures are constant, and the compression rectification tower is handled from the faints at the bottom of the former atmospheric distillation Tata; The faints amount accounts for 1/3 of total output;, because the atmospheric distillation tower no longer runs wine at the bottom of the control tower, overhead reflux satisfies impurities removal and gets industrial alcohol and gets final product; Therefore wine with dregs tower control temperature can reduce, and atmospheric distillation tower reflux ratio reduces also to reduce the condenser group and takes away intrasystem heat.
2, the compression rectification tower adopts the tower bottom steam heating; The cat head heat converts the heating thermal source that indirect steam is used for wine with dregs tower and atmospheric distillation tower to through steam generator; No longer consume live steam; Waste water also is used for material heating in the system through each heat transmission equipment at the bottom of the compression rectification Tata, and this waste water is at last outside normal pressure rectifying column backflow preheat device discharge system.Therefore, be used for the heat of compression rectification tower, except that waste water at the bottom of the tower, finished product alcohol and fusel oil heat exchange are taken out of outside the part heat, and all the other heats are all stayed in the system.
3, finished product alcohol is concentrated by former atmospheric distillation tower one tower and changes the atmospheric distillation tower into and compression rectification tower two towers concentrate, thereby reduces the steam consumption of whole technology.
The present invention compares with two tower air-distillations, saves steam more than 20%, practices thrift cooling water more than 30%; Joint vapour water-saving result is remarkable, has significantly reduced the consumption of steam, has reduced the production cost of enterprise; Significantly reduced the improvement expenses of enterprise simultaneously, killed two birds with one stone.
Description of drawings
Fig. 1 is a production system sketch of the present invention.
Marginal data, 1-compression rectification tower reboiler, 2-compression rectification tower alcohol preheater, 3-steam generator; 4-compression rectification tower reflux pump, 5-vapour liquid separator, 6-atmospheric distillation tower reboiler, 7-compression rectification tower feed pump; 8-vinasse pump, 9-atmospheric distillation tower condenser, 10-atmospheric distillation tower reflux pump, 11-fume preheater; 12-vinasse preheater, 13-wine with dregs tower, 14-atmospheric distillation tower, 15-compression rectification tower.
The specific embodiment
With reference to accompanying drawing the energy-conservation differential pressure alcohol distillation of three towers production system of the present invention is further specified.
This production owner will comprise the two tower air-distillation systems that wine with dregs tower 13, atmospheric distillation tower 14 and vinasse pump 8, atmospheric tower condenser 9, atmospheric tower reflux pump 10, wine with dregs tower fume preheater 11, wine with dregs tower vinasse preheater 12 are formed, and wherein it also comprises the compression rectification system that is made up of compression rectification tower 15 and pressurization auxiliary device; The pressurization auxiliary device comprises pressurizing tower reboiler 1, compression rectification tower alcohol preheater 2, steam generator 3, compression rectification tower reflux pump 4, vapour liquid separator 5, atmospheric distillation tower reboiler 6, compression rectification tower feed pump 7.Steam generator 3 is vertical tubular heat exchanger, and its tube side is connected with vapour liquid separator 5, and its shell side is communicated with the cat head wine steam pipe road of compression rectification tower 15; The faints pipeline of atmospheric distillation tower 14 bottoms is connected with compression rectification tower 15 charging apertures through rectifying compression rectification tower feed pump 7, compression rectification tower alcohol preheater 2 successively; The jet chimney of the steam inlet of compression rectification tower 15 and compression rectification tower reboiler 1 is connected; Compression rectification tower 15 bottom wastewater outlets are connected with vapour liquid separator 5 behind compression rectification tower alcohol preheater 2; The condensate outlet of steam generator 3 is connected through compression rectification tower reflux pump 4 and compression rectification tower 15 top return tanks; The overhead vapor outlet of vapour liquid separator 5 is connected with wine with dregs tower 13 and atmospheric distillation tower 14 steam inlets, and vapour liquid separator 5 middle heat water outs and atmospheric distillation tower reboiler 6 are connected, and vapour liquid separator 5 bottom wastewater outlets and steam generator 3 are connected.
Technical process of the present invention is following:
1, wine with dregs tower process process: from the fermentation workshop section ripe mash with being pumped into wine with dregs tower fume preheater 11 tube sides and wine with dregs tower vinasse preheater 12 tube sides; Get into wine with dregs tower 13 after the preheating and be divided into fume and vinasse, fume is discharged entering atmospheric distillation tower 14 through wine with dregs tower 13 cats head and is further separated; Vinasse at the bottom of wine with dregs tower 13 towers, get into wine with dregs tower vinasse preheater 12 shell sides and karusen carries out heat exchange, remove vinasse pond and treatment and finishing section after the heat exchange;
2, atmospheric distillation tower process process: the fume from wine with dregs tower 13 cats head separates into three parts through normal pressure rectifying column 14, is respectively: cat head fume part, the semi-finished product alcohol of tower middle and upper part and the faints at the bottom of the tower; Wherein cat head fume is partly through after 11 heat exchange of wine with dregs tower fume preheater, 9 condensations of atmospheric distillation tower condenser; Discharge behind the lower boiling head impurties such as eliminating aldehydes; The semi-finished product alcohol of tower middle and upper part advances compression rectification tower 15 further to be handled; Faints separated into two parts at the bottom of the tower, it is that atmospheric distillation tower 14 provides heat that a part generates steam through normal pressure rectifying column reboiler 6; Another part is sent into compression rectification tower 15 through 2 heating of compression rectification tower preheater and is recycled;
3, compression rectification tower process process;
From atmospheric distillation tower 14 bottom faintses, get into compression rectification tower 15 together with the semi-finished product alcohol of middle and upper part and separate again, separate the back and take out finished product alcohol in the tower middle and upper part, take out fusel wet goods high-boiling-point impurity and intermediate impurity in the tower middle and lower part;
Get into the waste water separated into two parts of vapour liquid separator 5, a part of hot water gets into atmospheric distillation tower reboiler 6 for it provides heat, discharges trench after the heat exchange, and it is that atmospheric distillation tower 14 provides heat with wine with dregs tower 13 that another part hot water gets into steam generator 3 generation steam.
Claims (2)
1. the energy-conservation differential pressure alcohol distillation of tower production system; It comprises the two tower air-distillation systems that wine with dregs tower, atmospheric distillation tower and auxiliary device are formed; It is characterized in that; It also comprises the compression rectification system that is made up of compression rectification tower and pressurization auxiliary device, and the pressurization auxiliary device comprises pressurizing tower feed pump, pressurizing tower reflux pump, pressurizing tower feed preheater, pressurizing tower reboiler, pressurizing tower steam generator and vapour liquid separator; Steam generator is vertical tubular heat exchanger, and its tube side is connected with vapour liquid separator, and its shell side is communicated with compression rectification column overhead wine steam pipe road; The faints pipeline of atmospheric distillation tower bottom is connected through pressurizing tower feed pump, pressurizing tower alcohol preheater and compression rectification tower charging aperture successively; The jet chimney of the steam inlet of compression rectification tower and pressurizing tower reboiler is connected; Compression rectification tower bottom wastewater outlet is connected with vapour liquid separator behind pressurizing tower alcohol preheater; The condensate outlet of steam generator is connected through pressurizing tower reflux pump and compression rectification top of tower return tank; The overhead vapor outlet of vapour liquid separator is connected with wine with dregs tower and atmospheric distillation tower steam inlet, and the reboiler of middle heat water out and atmospheric distillation tower is connected, and bottom wastewater outlet and pressurizing tower steam generator are connected.
2. the technical process of a production system as claimed in claim 1 is characterized in that, it comprises wine with dregs tower process process, atmospheric distillation tower process process and compression rectification tower process process, wherein:
Described wine with dregs tower process process is: from the fermentation workshop section ripe mash with being pumped into mash fume preheater tube side and mash vinasse preheater tube side; Get into the wine with dregs tower after the preheating and be divided into fume and vinasse, fume is discharged entering atmospheric distillation tower through the wine with dregs column overhead and is further separated; Vinasse at the bottom of the wine with dregs Tata, get into mash vinasse preheater shell side and karusen carries out heat exchange, remove vinasse pond and treatment and finishing section after the heat exchange;
Described atmospheric distillation tower process process is: the fume from the wine with dregs column overhead separates into three parts through the normal pressure rectifying column, is respectively: cat head fume part, the semi-finished product alcohol of tower middle and upper part and the faints at the bottom of the tower; Wherein cat head fume is partly through after the heat exchange of atmospheric distillation tower preheater, the condenser condenses; Discharge behind the lower boiling head impurties such as eliminating aldehydes; The semi-finished product alcohol compression rectification tower of tower middle and upper part is further handled; Faints separated into two parts at the bottom of the tower, a part generates steam through normal pressure rectifying column reboiler and for the atmospheric distillation tower heat is provided; Another part is sent into the compression rectification tower through the heating of compression rectification tower preheater and is recycled;
Described compression rectification tower process process is: from atmospheric distillation tower bottom faints; Getting into the compression rectification tower together with the semi-finished product alcohol of middle and upper part separates again; Separate the back and take out finished product alcohol in the tower middle and upper part, take out fusel wet goods high-boiling-point impurity and intermediate impurity in the tower middle and lower part; The compression rectification tower adopts 130 ℃ of steam directly to heat simultaneously, and the fume that the compression rectification column overhead is discharged discharges through the steam generator heat, contains the wine condensate pump and squeezes into the compression rectification top of tower; The waste water separated into two parts of discharging at the bottom of the compression rectification Tata, a part get into vapour liquid separator after the heat exchange of compression rectification tower alcohol heat exchanger, another part generates steam through compression rectification tower reboiler and for the compression rectification tower heat is provided; Get into the waste water separated into two parts of vapour liquid separator, a part of hot water gets into atmospheric distillation tower reboiler and for it heat is provided, and discharges trench after the heat exchange, and it is that atmospheric distillation tower and wine with dregs tower provide heat that another part hot water gets into steam generator generation steam.
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| CN109908616A (en) * | 2019-04-24 | 2019-06-21 | 中国轻工业西安设计工程有限责任公司 | The energy-saving distillation system and its distillating method of carbon monoxide ethyl alcohol |
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Application publication date: 20120613 |