JPH09801A - Can body of vacuum distillation-condensation apparatus for simple distillation type shochu - Google Patents

Abstract

PURPOSE: To produce softer and milder (Shochu by removing acetaldehydes highly efficiently by a fractionating method and at the same time to provide a remarkably pressure-lowering and distilling apparatus by which environment pollution occurrence is suppressed by concentrating waste liquid after distillation. CONSTITUTION: This apparatus is a stirring apparatus having an multiplied effect and composed of a jacket 8 provided with a head part pipe to use steam at decreased pressure and low temperature freely, a jacket 9 provided with a middle part pipe, a jacket 10 provided with a bottom part pipe, a jacket 11 provided with a plat pipe which is effective for surface evaporation, a characteristic phenomenon of greatly decreased pressure evaporation, an upper part center well 3 which can move up and down, and a fixed lower part center well 4. Further, the apparatus is provided with a rotary demistor 14 which prevents bubbling of bubbles generated the more, as the pressure is decreased more and is easy to be cleaned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is used in the production line and waste liquid treatment of the Otsuna Shochu factory, which exists in over 300 in Kyushu.

[0002]

2. Description of the Related Art The jacket of a conventional atmospheric distillation / vacuum distillation machine has its upper end irrespective of the liquid level at the time of mashing moromi.
It is located 7 to 8 cm below the mash liquid level after the completion of distillation. No heat plate is installed inside the can body of the distiller, and heat conduction is performed only from the inner wall surface of the can body or from a small heat plate provided slightly, and in the natural convection method, the heat transfer coefficient h (m / m ²・ K) is as low as (2.3 to 5.8) × 10 ^2, and h is (1.2 to
It was about 5.8) × 10 ³ , and there was a drawback that a foul-smelling substance was generated. In the case of using a stirrer, the upper part of the center well protruded from the liquid surface during distillation in the upper and lower integrated type fixed center wells, and there was only a method of attaching a short axis stirrer to the bottom plate.

[0003]

The jacket of the distiller is provided for indirectly heating the can body.
Since ordinary steam having a temperature of 100 ° C. or higher is used as a heat source, if the upper end of the jacket is set high in accordance with the mash liquid level at the start of distillation, indirect heating occurs when the distillation proceeds and the mash liquid level drops. Despite this, the charcoal burns on the wall of the can. Therefore, as a countermeasure, even after the completion of distillation, the upper limit of the heating surface, that is, the upper end of the jacket was set at 6 to 8 cm below the mash liquid level. Therefore, the average overall transfer coefficient U (kcal / hr ・ ° C ・
m ² ) was as low as 300 or less when steam was used.

The heat source is supplied only to the contact surface between the can body wall and the jacket, and there is no large heating plate inside the can body. As the distiller becomes larger, the material contact heating area A relative to the amount of moromi swelling increases.
There has been a problem that the ratio of (m ² ) decreases and the heat transfer amount Q decreases. For example, the diameter of 1,600 m / m, the depth of mash filling liquid is 1.500 m / m, and the A of 2KL distiller is about 9.5.
m ^{2, and} the mash per 1 m ² becomes 210L. On the other hand, the diameter is 2,100 m / m, the depth of the mashed liquid is 1,470 m / m, and the A of the 6 KL distiller is about 13.2 m.
^{At 2} , the mash amount per 1 m ² increases to 454 L. It can be seen that the material to be heated, that is, the amount of mash is more than double the material contact heating area A (m ² ).

When the conventional technique of using the integrated type center well is used, the upper part of the center well protrudes from the liquid surface as the diluting liquid level is lowered with the progress of distillation, and stirring becomes impossible. Moreover, the stirring effect on the upper part of the liquid surface could not be expected with the short-axis stirrer.

As a countermeasure against bubbling for a vacuum distillation machine, there has been a conventional method of using a baffle plate, a wet wall, a perforated plate rack, and a bubble cap rack, but it has a drawback that it cannot be cleaned.

[0007]

In order to solve the above problems and achieve the object, the present invention uses the following techniques.

First, the jacket of the distiller was entirely covered with a jacket. Since this jacket has a pipe line, the heat transfer speed is 30 m / sec or more even with low-pressure low-temperature steam, and the overall heat transfer coefficient U
(Kcal / hr · ° C. · m ² ) was 1,000 or more. For this reason, low pressure steam that has been decompressed is used
It became possible to distill up to the back reservoir without creating a burning odor.

By installing a jacket with a radial flat plate inside the can body, the larger the size of the can body of the distiller, the smaller the material to be heated, that is, the amount of mash, with respect to the material contact heating area A (m ² ). For example, diameter 2,100m / m, mash filling depth 1,470m / m, 6KL distiller A
In the case of 12, the total of A is 42 m ² due to the 12-sided rigid hot plate, and the mashing amount per 1 m ² is 142 L. In case of 18 surfaces, the amount of mash is 56.4 m ² and the amount of mash is 10 per 1 m ^2.
Reduce to 6L.

The center well is divided into an upper center well that moves up and down and a fixed lower center well, and the rotor bar with a screw attached to the upper center well is rotated in accordance with the mash liquid level to lower the center well. The upper end no longer protrudes from the mash liquid surface when the mash is distilled and when it is completed. Since the center well was used in this manner, good circulation stirring was obtained.

Once the conventional bubbling prevention device is attached, it cannot be cleaned not only from the inside of the concentrating column but also from the outside, and it is difficult to adopt it for hygiene. The rotary demister of the present invention can be easily cleaned and replaced from the outside by using a manhole with a vacuum O-ring rubber gasket, and it is possible to prevent bubbling.

[0012]

[Operation and effect] Since the jacket with pipes divided into three stages enables low temperature distillation of 50 to 30 ° C according to the progress of distillation, the overall heat transfer coefficient of 1,000 or more can be obtained without burning the product. The distilling speed was about 30% faster than the conventional type and the distilling rate reached 98%. Next, by arranging a jacket with a flat pipe line radially inside the still body of the distiller, the material contact heating area A (m ² ) of the mash is dramatically increased, and the above-mentioned overall heat transfer coefficient is set to 1. In addition to setting it to 000 or more, the distillation time could be shortened by about 40%. The production cost has decreased and the post-distillation phenomenon due to long-time distillation has disappeared. A center well is used and a jacket with a flat-plate conduit is installed in the can body in a rigid radial shape, which has a synergistic effect on stirring and a strong tendency to evaporate on the surface. Time is about 60% of that of a conventional vacuum distiller. The bubbling that occurs without fail under high pressure could be easily prevented by the present invention. This can body is capable of not only distilling but also concentration of waste liquid at the end of distillation, and the amount of waste liquid is reduced by 30% in about 1 hour from the test example. 50 for potato shochu waste liquid
% Has also decreased. It became one of the effective land treatment methods for the cancellation of ocean dumping decided at the end of 1995.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a can body of an Otsuna Shochu high-pressure vacuum distiller in which a radial rigid hot plate is arranged inside the can body.

[Explanation of symbols]

 1 Distiller can 2 Concentration tower 3 Upper center well that moves up and down 4 Fixed lower center well 5 Vacuum rotor machine part 6 Rotating rod with screw 7 Fixed receiving rod with screw 8 Head pipe jacket 9 Middle pipe line Jacket 10 Jacket with bottom conduit 11 Jacket with flat conduit 12 Vacuum rotor machine for rotary demister 13 Shaft for rotary demister 14 Rotary demister 15 Guide ring plate for rotary demister 16 Bubble cap and slot 17 Bubble return port 18 Bubble tray 19 Bubble return pipe 20 Reducer for stirrer 21 Stirrer shaft 22 Leg 23 Vacuum O-ring Manhole with rubber gasket

Claims (4)

[Claims] 1. A distiller can body (1) is divided into three stages from the head of the distiller body, a jacket with a head conduit (8), a jacket with a middle conduit (9), and a jacket with a bottom conduit (10). ), Can cover the entire surface, and high thermal efficiency can be obtained even when using low-pressure low-temperature steam. 2. A can body in which a large number of jackets (11) having flat plate conduits are radially arranged inside the distiller can body (1) according to the diameter of the can body so as to obtain high thermal efficiency. 3. A stirring device comprising an ascending upper center well (3) and a fixed lower center well (4) is attached to the central part of the still body (1) of the distiller, so that high stirring efficiency is achieved. A can that can be obtained. 4. A rotary demister (14), which is supported by a rotary demister vacuum rotor machine part (12) and a rotary demister shaft (13) at the head of the concentrating tower (2) and is rotatable, Is attached. Further, a guide ring (15) for the rotary demister is attached to the lower part of the rotary demister. A can with this structure.