JP2007159426A - Facility for processing distilled spirit lees - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a facility for processing distilled spirit lees without using cooling water for cooling a gas generated by the distillation of a concentrated liquid obtained from distilled spirit lees and capable of decreasing the amount of steam for the evaporation of alcohol. <P>SOLUTION: The facility for processing distilled spirit lees is provided with a solid-liquid separation means to perform the solid-liquid separation of the distilled spirit lees, a concentration means 1 to receive the separation liquid separated by the solid-liquid separation means and concentrating the liquid under reduced pressure, an ethanol recovery means 8 to separate and recover ethanol from the gas generated by the concentration means 1, and a compressor 6 to compress and liquefy the gas generated by the concentration means 1. A preferable embodiment of the invention comprises the setting of the temperature of the liquid formed by the compressor 6 to 80-90°C, and another preferable embodiment comprises the use of a high-speed rotary volume compressor as the compressor 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a shochu treatment facility, and more specifically, it is possible to eliminate cooling water for cooling a gas obtained by distilling a concentrate obtained from shochu, and to further use an amount of steam for evaporating alcohol. It is related with the shochu processing equipment which can reduce.

  In 1993, a number of countries, including Japan, adopted the London Convention (the Convention on the Prevention of Marine Pollution from Waste and Other Disposals). Shochu is currently recognized as an exempted item from the Convention, but as a matter of fact, it is difficult to continue the conventional ocean dumping as it is, and efforts in the shochu industry are aimed at the total disposal of land. Has been made.

  Shochu usually contains moisture and solids, and moisture is contained in an amount of 90% by weight or more. The solids contain a large amount of protein, starch, fiber, and the like.

  Although incineration is also conceivable as an onshore treatment of such shochu, it is not a preferable method because incineration facilities and fuel costs increase.

  For this reason, in recent years, Patent Documents 1 and 2 have proposed methods for producing feed, focusing on the components of shochu.

On the other hand, ethanol is contained in shochu, and effective recovery of these is desired, but Patent Document 3 recognizes that ethanol is contained in shochu, but the content is small. Therefore, a technique for wastewater treatment and disposal outside the system is disclosed.
Japanese Patent No. 3495429 Japanese Patent No. 2976072 Japanese Patent Laid-Open No. 11-63455

  Therefore, focusing on the point that it is not economical to drain the ethanol contained in the shochu and drain it to the outside, we examined the ethanol recovery technology and considered the process shown in FIG.

  In FIG. 4, 50 is a concentration means for concentrating the separated liquid sent from a solid-liquid separation means (not shown) under reduced pressure. An evaporator is used as the concentrating means 50, and a concentrating operation is performed while circulating through the circulation pump 51 while being decompressed by a vacuum pump (not shown). A heater 52 heats the circulating liquid, and steam is used as a heating source.

  The concentrated solution concentrated by the concentration means 50 is taken out from the pipe 53 and used as an additive for feed.

  On the other hand, the gas discharged from the concentration means 50 is cooled by the cooler 55 in the process of being discharged from the upper part and sent to the ethanol recovery means 54. Cooling water is used for cooling. The gas is cooled to become a liquid, and the temperature of the liquid is about 60 ° C.

  The liquid sent to the ethanol recovery means 54 is heated with steam, the ethanol component contained in the liquid evaporates, becomes ethanol-containing steam (gas), is discharged from the top, and is cooled by the cooler 56 and then liquefied. The ethanol-containing water is collected in the ethanol recovery tank 57.

  On the other hand, the liquid produced | generated by the ethanol collection | recovery means 54 is stored in the waste_water | drain tank 58 as waste_water | drain, and is drained.

  With the above method, alcohol of about 70 wt% ethanol could be recovered, and a revolutionary system could be realized.

  However, this system has the following problems to be improved.

  That is, the present invention eliminates the cooling water for cooling the gas obtained by distilling the concentrate obtained from the shochu, and further reduces the amount of steam used for alcohol evaporation. It is an issue to provide.

  The other subject of this invention becomes clear by the following description.

The above problems are solved by the following inventions.

(Claim 1)
Solid-liquid separation means for solid-liquid separation of shochu, concentration means for concentrating the separated liquid separated by the solid-liquid separation means, and ethanol recovery for separating and recovering ethanol from the gas generated by the concentration means A shochu processing equipment having means,
A shochu treatment facility comprising a compressor that compresses and liquefies gas generated by the concentrating means.

(Claim 2)
The temperature of the liquid produced | generated with the said compressor is the range of 80 to 90 degreeC, The cauterization processing equipment of Claim 1 characterized by the above-mentioned.

(Claim 3)
The ablation processing equipment according to claim 1, wherein the compressor is a high-speed rotary displacement type.

  According to the present invention, it is possible to eliminate the cooling water for cooling the gas obtained by distilling the concentrated liquid obtained from the shochu, and to further reduce the amount of steam used for the evaporation of alcohol. Can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a flow chart showing a preferred embodiment of the present invention, in which 1 is a concentration means for concentrating a separated liquid sent from a solid-liquid separation means (not shown) under reduced pressure.

  Although the concentration means 1 is not particularly limited, for example, a triple effect can is used, and the concentration operation is performed while circulating the circulating fluid with the circulation pump 2 in a state where the pressure is reduced by a vacuum pump (not shown). . 3 is a heater for heating the circulating liquid, and steam is used as a heating source.

  The concentrated liquid concentrated by the concentration means 1 is taken out from the pipe 4, stored in the concentrated liquid tank 5, and used as an additive for feed.

  The gas discharged from the concentrating means 1 is sent from the top to the compressor 6 via the pipe 7 and compressed.

  The configuration of the compressor 6 is not particularly limited, but any of a high-speed rotary displacement type, an ultra-high-speed rotary volume type, a low-speed reciprocating volume type, and an ultra-high-speed rotary centrifugal type may be used. Since it can compress to a high compression ratio, it is preferable. As the high-speed rotary displacement type capacity control, stepless control by a slide valve is usually adopted. Although liquefaction is possible by compression by the compressor 6, the temperature of the liquid is raised at the same time.

  In the present invention, it is preferable to raise the temperature of the liquid to a range of about 80 ° C. to 90 ° C. by compression by the compressor 6.

  The liquid generated by the compressor 6 is sent to the ethanol recovery means 8. In the ethanol recovery means 8, the liquid is further heated to a temperature at which ethanol vapor is generated with vapor.

  The ethanol component contained in the liquid evaporates to become ethanol-containing vapor (gas) and is discharged from the top.

  Thus, in the present invention, the use of the compressor 6 eliminates the need for a cooler that cools the gas discharged from the conventional concentration means, eliminates the cooling water that was used there, and allows the liquid to be recovered by compression. Since the temperature is raised and the enthalpy corresponding to the temperature rise can be reduced, there is an effect that the amount of steam supplied to the ethanol recovery means 8 can be reduced.

  The ethanol-containing steam generated by the ethanol recovery means 8 is sent to the cooler 10 via the pipe 9. The cooler 10 is cooled by cooling water. The ethanol-containing water liquefied after cooling is collected in the ethanol recovery tank 11. The ethanol concentration is also affected by the ethanol concentration during the shochu. For example, when the solid content in the shochu at 130 t / D is 6.0 to 10.0 wt% and the ethanol concentration is 0.3 to 0.8 wt%, A final recovered alcohol having a concentration of about 70 wt% is obtained in a range of 0.4 t / D to 1.36 t / D.

  On the other hand, the liquid produced | generated by the ethanol collection | recovery means 8 is stored in the waste_water | drain tank 12 as waste_water | drain, and is drained.

  The preferred embodiment of the present invention has been described above. However, in the above-described aspect, one compressor or a plurality of compressors may be used.

  As the concentration means 1, it is also preferable to use the facilities shown in FIGS. 2 and 3 in order to concentrate to a high concentration (40% or more).

  FIG. 2 is an overall configuration diagram illustrating an example of the concentrating unit 1 using a spray evaporator, and FIG. 3 is a cross-sectional view of a main part illustrating a cyclone portion of the spray evaporator.

  The concentrating means 1 includes an evaporator 32 having a spray nozzle 31 therein, a pump 33 that pressurizes the separated liquid supplied to the bottom 32a of the evaporator 32 to be discharged from the spray nozzle 31, and the pump 33 And the spray nozzle 31, and the concentrated liquid is measured by a measurement signal from a heater 34 for heating the separated liquid in the pipe and a concentration controller 35 installed between the pump 33 and the heater 34. A discharge mechanism 36 for discharging is provided.

  The inside of the evaporator 32 communicates with a vacuum pump (not shown), and the pressure is reduced by this vacuum pump.

  In the evaporator 32, a separation liquid supplied from a solid-liquid separation facility (not shown) is stored in a small-diameter bottom portion 32a, and a spray box 321 is attached in the can diameter tangential direction of the large-diameter barrel.

  As shown in FIG. 3, the spray box 321 is composed of a straight pipe part 321 a having a built-in spray nozzle 31 and a curved pipe part 321 b opened in the tangential direction of the evaporator 32.

  Therefore, the separated liquid sprayed by the spray nozzle 31 in the straight pipe portion 321a evaporates and then is introduced from the curved pipe portion 321b into the body of the evaporator 32 from the tangential direction.

  The heater 34 (corresponding to the heater 3 in FIG. 1) is supplied with steam as a heating source and is supplied with the separated liquid in the bottom 32a of the evaporator 32 by the pump 33, and heat exchange is performed inside. As a result, the separation liquid is heated.

  For example, by setting the steam temperature supplied to the heater 34 to 80 ° C., the 55 ° C. separation liquid is heated to 70 ° C. Condensed water after the steam heats and condenses the separated liquid is discharged from the heater 34 to the outside.

  The discharge mechanism 36 is disposed between the pump 33 and the heater 34. When the detection result by the concentration controller 35 reaches a predetermined concentration, the control valve 361 is opened and the concentrated liquid is discharged by the discharge pump 362. To do.

  In the concentration means 1, the separation liquid stored in the bottom 32 a of the evaporator 32 whose pressure is reduced to a predetermined degree of vacuum by the vacuum pump is forcibly circulated in the order of the pump 33, the heater 34, the spray nozzle 31, and the spray box 321. At the same time, steam is supplied to the heater 34.

  The separated liquid circulated by the pump 33 is heated by the heater 34 and then introduced from the spray nozzle 31 into the cylinder of the evaporator 32 in a depressurized state from the tangential direction and sprayed.

  The sprayed separated liquid is promoted to gas-liquid separation by the cyclone effect, the vapor is discharged from the top of the evaporator 32, and the concentrated liquid is stored in the bottom 32a of the evaporator 32 to have a predetermined concentration. Until the above, the above operation is repeated.

  When the liquid concentration in the evaporator 32 reaches a predetermined concentration, the concentration controller 35 generates a signal, the control valve 361 is opened, and the concentrated liquid is discharged to the outside.

  If scaling or the like occurs in the evaporator 32 in the concentrating means 1, the concentrating efficiency is lowered. Therefore, it is preferable to perform daily washing with warm water. This washing operation is pre-programmed as part of the concentration process and is preferably performed in a fully automatic operation. The washing effluent is returned to the stock solution storage tank 1 and is washed with caustic soda after being operated for a certain period of time according to the operating conditions.

Flow chart showing an example of shochu processing according to the present invention Overall configuration diagram showing an example of concentration means using a spray evaporator Cross section of the main part showing the cyclone part of a spray evaporator Figure showing a conventional example

Explanation of symbols

1: Concentration means 2: Circulation pump 3: Heater 4: Piping 5: Concentrated liquid tank 6: Compressor 7: Piping 8: Ethanol recovery means 9: Piping 10: Cooler 11: Ethanol recovery tank 12: Drain tank

Claims (3)

Solid-liquid separation means for solid-liquid separation of shochu, concentration means for concentrating the separated liquid separated by the solid-liquid separation means, and ethanol recovery for separating and recovering ethanol from the gas generated by the concentration means A shochu processing equipment having means,
A shochu treatment facility comprising a compressor that compresses and liquefies gas generated by the concentrating means.   The temperature of the liquid produced | generated with the said compressor is the range of 80 to 90 degreeC, The cauterization processing equipment of Claim 1 characterized by the above-mentioned. The ablation processing equipment according to claim 1, wherein the compressor is a high-speed rotary displacement type.

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