JP7090230B2 - Shochu Biomass Fuel Manufacturing Plant - Google Patents

Description

The present invention relates to a shochu biomass fuel production plant that produces regenerated ethanol for fuel from shochu distillation effluent, and particularly to a distillation facility thereof.

Previously, shochu distilled effluent was dumped into the ocean, but the London Convention has banned dumping into the ocean since 2001, and all of it is now treated on land. The shochu distillation effluent is mainly treated by methane fermentation, composted, and made into feed (see Non-Patent Document 1).

On the other hand, the shochu distillation effluent contains a small amount of ethanol of less than 1%, and Hatate et al. Of Kagoshima University have shown the possibility of ethanol recovery from the shochu distillation effluent (see Non-Patent Document 2). Further, in the production of sake and shochu, muddy lees and shochu lees containing a large amount of water and sake, which is a liquid portion to be a commercial product, are produced (see, for example, Patent Document 1). Therefore, the lees remaining after brewing sake may be distilled to recover the ethyl alcohol content and used as so-called lees-removing shochu for drinking.

In the production of sake, aspergillus is grown in steamed rice to produce koji, and water, steamed rice and yeast are added to this koji to produce mash, and then the mash is aged to make liquid sake and muddy lees. It was filtered and separated, and only liquid sake was shipped as a commercial product, and lees was discarded as industrial waste.

In the production of shochu, aspergillus is grown in steamed rice, steamed wheat, and steamed potatoes to produce koji, and water and yeast are added to this koji to produce primary mash, which is the main raw material for this primary mash. The secondary mash is produced by adding potatoes, wheat, rice, etc. to produce secondary mash, and then the secondary mash is distilled to separate it into liquid shochu containing alcohol and muddy shochu lees. , Only liquid shochu was shipped as a commercial product, and shochu mash was also discarded as industrial waste.

Since various nutrients such as crude proteins and organic acids remain in lees, as mentioned above, some techniques have been established for fertilizing or feeding and reusing them, but the amount of shochu produced. Along with the increase in lees, a large amount of lees is also produced, and the amount consumed as fertilizer or feed is extremely small compared to the amount of lees produced, and all lees cannot be reused as fertilizer or feed. rice field.

Therefore, a method for producing regenerated alcohol using shochu lees, which can recover the alcohol content remaining in the shochu lees produced as a by-product during the production of shochu and can extremely reduce the volume of solid residue, has been proposed (Patent Documents). See 2.). This is a mixture of fermented lees, lees or food residues and ethanol, distilled at least once, preferably multiple times to separate and extract the alcohol remaining in the lees. Not only that, lees or food residues fermented using a known method can also be used as a raw material for regenerated alcohol. The recovery of recycled alcohol using such shochu lees becomes a resource of waste, which is meaningful from the viewpoint of resource recycling.

Miyazaki et al., Mitsui Engineering & Shipbuilding Technical Report, 193, 30-35 (1998) Hatate et al., Kagoshima University Faculty of Engineering Research Report, 39, 117-120 (1997)

Japanese Unexamined Patent Publication No. 2005-237299 Japanese Unexamined Patent Publication No. 2014-18080 Japanese Unexamined Patent Publication No. 2016-77182

However, the production method disclosed in Patent Document 2 has a problem that the absolute amount of ethanol recovered is small because the concentration of ethanol in the distilled shochu waste liquid is low, and the energy recovery efficiency is low. Therefore, as a result of diligent research, the present inventor performed atmospheric distillation of the vacuum distillation waste liquid using potato as a raw material in the process of repeating the distillation experiment of the shochu distillation waste liquid, so that the amount of ethanol originally contained in the distillation waste liquid was increased. We found a phenomenon that the amount of ethanol recovered after distillation increases. This is because the temperature of the vacuum distillation waste liquid at the time of distillation is as low as 40 to 50 ° C., the enzyme group and yeast contained in the shochu mash maintain the activity, and the fermentation proceeds by the heating of the distillation, and new ethanol is produced. Knowing that, Patent Document 3 is the first proposal.

The invention of Patent Document 3 is a method for producing ethanol for fuel by a substance exchange function of shochu waste liquid. After mixing shochu distillation waste liquid and food residue containing starch, starch is saccharified, and ethanol fermentation is performed, at least once. It is characterized in that it is preferably distilled a plurality of times to separate and extract ethanol, and is characterized by the following steps.
(1) Step of mixing and fermenting shochu distillation waste liquid and food residue containing starch (2) Step of distilling the mixture after fermentation and separating it into solid and liquid to extract ethanol.

According to the above-mentioned production method, shochu lees and lees produced by a liquefaction method produced by a mass production method can also be used, and regenerated ethanol can be recovered. In addition, ethanol for fuel can be recovered from the distilled liquor of shochu, and not only can the volume of solid residue be significantly reduced, but also the residue can be used as fuel, livestock feed, etc. to be almost completely recycled. Play.

An object of the present invention is to provide a shochu biomass fuel production plant capable of achieving practical application of the technique described in Patent Document 3, particularly in a distillation facility, and achieving a high rectification effect of regenerated ethanol.

Therefore, the shochu biomass fuel plant of the present invention is a shochu biomass fuel plant provided with a distillation kettle into which a distillation mixture containing a distillation waste liquid and a starchy substance is charged, and the fermentation mixture is solid-liquid inside the distillation kettle. A raw material gago to be separated is attached, and at least three distillers are layered on the upper part of the distillation pot, and the distillers are communicated with each other by a stock solution flow pipe to establish a multi-layer distillation section. The lid is closed with a lid attached to an elbow tube that communicates with the condenser, and the distiller on the bottom floor is equipped with a stock solution flow tube whose lower end is bent like a hook facing the inside of the distillation pot. A heater for supplying steam from the saturated steam supply line is provided in the lower part of the distillation pot, and the fermentation mixture separated into solid and liquid inside the distillation pot is heated and distilled, and the inside of the multi-layer distillation unit is sequentially repeated. The gaseous distillate (regenerated ethanol) sent to the condenser (condenser) was condensed and liquefied while being gradually volatilized and distilled, and then flowed down to a cooler and discharged from the cooler. The first feature is that a distillation recirculation line is provided, in which the ethanol content obtained by passing through an oil-water separator that separates the ethanol content and the water content is sent to the multi-layer distillation unit and redistilled . In addition, each distiller is equipped with a sight glass on its side that directly visually monitors the flow, stoppage, and flow rate / flow rate of the fluid passing through the distiller, and has a distilling chamber from a cylindrical cloak with a bottom plate. The top and bottom are opened on the bottom plate, an overflow cylinder (middle cylinder) with a smaller diameter than the cloak is erected, and a lid crown that closes the upper opening of this overflow cylinder (middle cylinder) is fixed and formed. The second feature is that a stock solution introduction hole is formed at the upper end of the overflow cylinder (middle cylinder) and a stock solution discharge hole is formed around the lower end of the lid crown .

According to the present invention, the excellent effects described below can be obtained.
(1) According to the present invention, a high rectification effect can be obtained and regenerated ethanol having extremely high purity can be recovered.
(2) Since at least three distillers are layered in the distillation pot and the distillers are communicated with each other by a ventilation pipe, no special air supply means is required.
(3) Since the cooler is added, recycled ethanol can be produced with shortened distillation time and high energy efficiency without deteriorating the raw materials.

Further, in the present invention, the residual ethanol of the shochu distillation waste liquid is extracted by mixing the shochu distillation waste liquid and the food residue containing the starchy substance, fermenting the mixed liquid with ethanol, and repeatedly distilling the mixed liquid a plurality of times to produce shochu. It is possible to reduce the by-product rate of shochu cake (residue) with respect to the amount.

It is a block diagram schematically showing the outline of the manufacturing process of recycled ethanol and the waste liquid treatment plant which concerns on this invention. It is a block diagram schematically showing the outline of the shochu biomass distillation plant which concerns on this invention. It is a partial side sectional view of the distillation pot which concerns on this invention. (A) of the distillation pot which concerns on this invention is a side sectional view which shows the upper lid body, (b) is a side view which shows the lid body of a capacitor. (A) is a partial cross-sectional plan view, and (b) is a side sectional view showing an example of the first distiller of the distillation pot according to the present invention. (A) is a side sectional view showing an example of a second distiller, and (b) is a side sectional view showing a third distiller of the distillation pot according to the present invention.

First, the case where the method for producing regenerated ethanol for fuel according to the present invention is applied to the imo-jochu distilled waste liquid will be illustrated below. That is, it is a method of producing new ethanol by effectively reusing the shochu lees produced as a by-product in the known shochu production process.

As shown in FIG. 1, a reduced pressure and normal pressure shochu distillation waste liquid 1 and a food residue 2 containing starch are mixed at an appropriate ratio to obtain a mixed liquid 3. Next, the starchy substance of this mixed solution 3 is saccharified and fermented with ethanol. As a result, ethanol, which normally contains less than 1% in shochu distillation waste liquid, can be increased to about 10%, which is about 10 times higher than the initial amount. Examples of the food residue include potato residue, tea leaves, coffee grounds, and fruit juice squeezed meal.

This is to effectively utilize the material conversion function of the saccharifying enzymes and yeast enzymes contained in the shochu distillation waste liquid 1 to convert the food residue into ethanol as a raw material. Then, the produced ethanol is distilled (evaporation step 4), and ethanol for fuel 8 can be obtained through the ethanol recovery step 5 and the ethanol purification step 7.

Then, the obtained regenerated ethanol 8 is used to operate the boiler equipment 13 which is the heat source of the power generation equipment 14 to obtain electric power. The electric power obtained by the power generation facility 14 is used for the heat source of the drying facility 9 for performing the distillation (evaporation step 4) and the drying step of the solid content of the waste liquid (distillation residue 6) and the operation of the entire processing plant. Surplus electricity can be sold. Further, the dry solid content obtained from the treatment waste liquid is used as a solid fuel as a fuel for the boiler equipment 13 or as a feed for livestock 10. The high BOD residue remaining after the separation of the dry solid content is reduced (high BOD reduction step 11) by a known method and disposed of as the final waste liquid 12.

Through these series of treatments, the energy and cost required for recovery of ethanol contained in the distilled shochu effluent can be significantly reduced. That is, it can be said that it is an effective means to efficiently carry out the waste liquid treatment process by converting the substance from the biomass in the food residue as a raw material by utilizing the biological function left in the distilled shochu waste liquid.

As shown in FIGS. 2 to 4, the shochu biomass fuel plant according to the present invention is operated by using a commercial power source 42 as a power source. It is an example of the equipment which embodies the distillation step 4, the ethanol recovery step 5, and the ethanol purification system 7 in the above step, and is a fermentation mixture 3 of the shochu waste liquid 1 and the food waste 2 obtained in the above fermentation step (hereinafter, The undiluted solution 3) is transferred to the distillation pot 15 for distillation. A raw material gago 15a for charging a solid substance is attached to the inside of the distillation pot 15, and a first distiller (upper shelf stage) 16a, a second distiller (middle shelf stage) 16b and a third distiller (middle shelf stage) 16b are attached to the upper part thereof. The distiller (lower shelf) 16c is erected in a layered manner, and the inside of the distiller (lower shelf) 16c is communicated with the stock solution flow pipes 17a, 17b , 17c and 17d having a hook-shaped bend at the lower end facing the inside of the distillation pot. It is provided. These three layered distillers 16a, 16b and 16c are referred to as a multilayer distillation unit 16.

An elbow tube 32 is attached to the first distiller (upper shelf stage) 16a of the multi-layer distillation unit 16 provided in the upper part of the distillation pot 15 in order to communicate with the condenser (condenser) 30 by the suction hose 31. The lid is closed by the lid 33, and the condenser 30 is also closed by the lid 35 to which the elbow tube 34 for connecting to the suction hose 31 is attached. Further, a thermometer 28 and a side temperature resistor 29 are attached to the distillation pot 15 so that the internal temperature of the distillation pot 15 can be monitored.

Steam is supplied from the saturated steam supply line L1 to the heater 43 via the strainer 49, the pressure reducing valve 50, and the flow meter 51 at the lower part of the distillation pot 15. The heater 43 is composed of a direct steam heat source 43a and an indirect steam heat source 43b, and is designed to heat-distill the undiluted solution 3 charged in the distillation pot 15. The indirect steam heat source 43b is provided with a steam drain 46 for eliminating condensate in the saturated steam supply line L1 via the steam trap 45. Further, a waste liquid discharge port 15e for discharging the residue (final waste liquid) 12 after distillation of the undiluted solution is provided at the lower end of the steam kettle 15. In the figure, 49 is a pressure gauge and 52 is a valve so that the amount of saturated steam supplied and the pressure can be adjusted as appropriate.

As shown in FIGS. 5 to 6, the basic configuration of each of the distillers 16a, 16b and 16c of the multi-layer distillation unit 16 directly shows the general condition of the flow, stoppage and flow rate / flow rate of the fluid passing through the distiller on the side surface. A sight glass 18 to be visually monitored is attached, and a distillation chamber 21 is partitioned from a tubular cloak 20 having a bottom plate 19, the top and bottom are opened to the bottom plate 19, and an overflow cylinder (middle) having a smaller diameter than the cloak 20. The cylinder) 22 is erected, and the lid crown cylinder 23 that closes the upper opening of the overflow cylinder 22 is fixed with a thumbscrew 23a. A stock solution introduction hole 24 is formed in the upper end portion of the overflow cylinder (middle cylinder) 22, and a stock solution outlet hole 25 is formed around the lower end portion of the lid crown 23. Then, the undiluted solution 3 solid-liquid separated by the distillation pot 15 rises while being sequentially and stepwise volatile-distilled in the multi-layer distillation unit 16 to remove impurities, whereby a high rectification effect can be obtained. As shown in FIG. 5, the thermometer 28 and the side temperature resistor 29 are attached to the sleeve tube 27 so that the internal temperature of the multilayer distillation unit 16 can be monitored by the temperature recorder 41 by the temperature sensor 44. preferable.

The gaseous distilled liquid (regenerated ethanol) 8 sent from the multilayer distillation unit 16 to the condenser 30 is condensed in the condenser 30 and flows down to the cooler 38. Tap water as a refrigerant is supplied to the cooler 38 from the cooling water supply port 55, and is further cooled while flowing through the spiral pipe 38a arranged inside the cooler 38. Further, the cooling water used as a refrigerant and vaporized is sent to the condenser 30, condensed and liquefied, and discharged from the cooling water discharge port 30a. A positive pressure safety valve 55 is attached to the condenser 30, and a temperature sensor 44 is attached to the tip of the spiral tube 38a.

The distillate flowing out of the cooler 38 passes through the oil-water separator 37 to separate ethanol (oil) 8 and water, and then is stored in the regenerated ethanol storage tank 39. A sample outlet 39d is branched from the oil-water separator 37. Further, a distillate recirculation line L2 is provided from the middle of the route from the cooler 38 to the oil-water separator 37 to the multi-layer distillation unit 16, and the distillate flowing out from the cooler 38 is sent to the multi-layer distillation unit 16 by the liquid feed pump 47. The rectification effect can be improved and the regenerated ethanol 8 having extremely high purity can be recovered by repeatedly distilling the liquid by sending it to the liquid. These operations are controlled by the control panel 36.

A vacuum pump 40 is connected to the regenerated ethanol storage tank 39 via a compression line L3, and the regenerated ethanol 8 is allowed to flow into the tank by compressing the inside of the storage tank 39 into a vacuum state. Therefore, an air bleeding 39e for releasing the vacuum is provided. In the figure, 39a and 39b are viewing windows, and 39c is an outlet for the distillate (regenerated ethanol) 8.

The shochu biomass fuel production plant according to the present invention can be applied to waste liquid treatment of alcoholic beverages other than shochu or fermented food residue, and can help solve problems in industrial waste treatment. That is, it can be used in waste treatment techniques in the liquor manufacturing field and the food manufacturing field.

1 Shochu distillation waste liquid 2 Food waste (containing starch)
3 Fermentation mixture (undiluted solution)
4 Distillation (evaporation process)
5 Ethanol recovery step 6 Distillation residue 7 Ethanol purification step 8 Regenerated ethanol (tanol for fuel)
9 Drying equipment 10 Feed 11 High BOD reduction process 12 Final drainage 13 Boiler equipment 14 Power generation equipment 15 Distiller 15a Peeping window 15b Peeping window 15c Peeping window 15d Peeping window 15e Waste liquid discharge port 16 Multilayer distillation unit 16a First distiller ( Upper shelf)
16b Second distiller (middle shelf)
16c 3rd distiller (lower shelf)
17a Undiluted solution flow pipe (straight pipe)
17b Undiluted solution flow pipe (straight pipe)
17c undiluted solution flow pipe ( straight pipe)
17d undiluted solution flow pipe (hook pipe)
18 Sight glass 19 Distiller bottom plate 20 Distiller mantle 21 Distillation chamber 22 Overflow pipe (middle cylinder)
23 Closure crown tube 23a thumbscrew 24 undiluted solution inlet 25 undiluted solution outlet 26 undiluted solution flow tube insertion tube 27 sleeve tube 27a through hole 28 thermometer 29 side temperature resistor 30 condenser (condenser)
30a Cooling water drain port 31 Suction hose 32 Elbow pipe 33 Distiller lid 34 Elbow pipe 35 Condenser lid 36 Control panel 37 Oil / water separator 38 Cooler 39 Storage tank 39a Looking window 39b De-window 39c Distillate outlet 39d Sample outlet 39e Air bleeding (vacuum release)
40 Vacuum pump 41 Temperature recorder 42 Commercial power supply 43 Heater 43a Direct steam heat source 43b Indirect steam heat source 44 Temperature sensor 45 Steam trap 46 Steam drain 47 Circulation pump 48 Strainer 49 Pressure gauge 50 Pressure reducing valve 51 Flow meter 52 Valve 53 Check valve 54 Positive pressure safety valve 55 Cooling water supply port L1 Saturated steam supply line L2 Distillate recirculation line L3 Pulling line

Claims (2)

In a shochu biomass fuel plant equipped with a distillation kettle into which a distillation mixture containing shochu distillation waste liquid and starch is charged, a raw material gago for solid-liquid separation of the fermentation mixture is attached to the inside of the distillation kettle, and the distillation kettle is provided. At least three distillers are layered on the upper part of the distiller, and the distillers are connected to each other by a stock solution flow pipe to establish a multi-layer distillation unit. The bottom-floor distiller, which is closed with an attached lid, is equipped with a hook-shaped undiluted solution flow pipe whose lower end faces the inside of the distillation pot, and a saturated steam supply is provided at the bottom of the distillation pot. A heater to which steam is supplied from the line is provided, and the fermentation mixture separated into solid and liquid inside the distillation pot is heated and distilled, and the inside of the multi-layer distillation unit is sequentially and stepwise raised while volatile distillation. After condensing the gaseous distillate (regenerated ethanol) sent to the condenser (condenser), it is made to flow down into a cooler, and the distillate flowing out of the cooler is separated into ethanol and water. A shochu biomass fuel plant characterized by being provided with a distillation recirculation line for redistributing the ethanol content obtained by passing through the distillation unit to the multi-layer distillation unit . Each distiller is equipped with a sight glass on its side that directly visually monitors the flow, stoppage, and flow rate / flow rate of the fluid passing through the distiller, and separates the distillation chamber from a cylindrical cloak with a bottom plate. It is formed by opening the top and bottom of the bottom plate, erecting an overflow cylinder (middle cylinder) with a smaller diameter than the cloak, and fixing the lid crown that closes the upper opening of this overflow cylinder (middle cylinder). The shochu biomass fuel according to claim 1 , wherein a stock solution introduction hole is formed in the upper end portion of the overflow cylinder (middle cylinder), and a stock solution outlet hole is formed around the lower end portion of the lid crown. plant.

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