JPH07194363A - Apparatus for vacuum treatment of waste liquid of distilled liquor - Google Patents

Abstract

PURPOSE:To provide an apparatus capable of concentrating and drying waste liquid of distilled liquor and recycling it in the form of a fertilizer or a feed without environmental pollution at a low cost while saving energy. CONSTITUTION:A vacuum concentration and drying tank 100 connected to a storage tank 110 is equipped with a vacuum pump 120 for reducing pressure and hot exhaust water which was used for cooling a condenser 151 in a distillation process of low-class distilled liquor is introduced into a hot water jacket 21, etc., for heating the vacuum concentration and drying tank 100. In addition, for the purpose of vacuum evacuation of the vacuum concentration and drying tank 100, this tank is connected through a separator 40 for preventing scattering of organic solid components to a vacuum evacuation system composed of a water ejector 131, a hot well 132, a cooling tower 141.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum processing apparatus for distilled liquor waste liquid generated as distiller residue in a process for producing shochu and other distilled liquor.

[0002]

2. Description of the Related Art For example, in the manufacturing process of shochu, there is 5 to 5
It contains 7% of organic solids and is classified as organic sludge and cannot be discharged as it is to general rivers. Therefore, ocean dumping has been carried out until now, but it is in the direction of being prohibited worldwide.

On the other hand, it has been started to concentrate the waste liquid into fertilizer or feed. However, when concentrated to a high concentration, the liquidity as a liquid is lost, so the concentration of the organic solid content is limited to 18 to 20%. Therefore, storage and transportation thereof are costly, and there is a limit to their use, and there are problems in manufacturing costs and environmental pollution as will be described later.

There has also been an attempt to dry the above concentrated liquid in a separate dryer, but both a concentrating device and a dryer are required, and a highly viscous concentrated liquid must be transferred from the concentrating device to the dryer. It has to be done, and rising costs are inevitable. Further, in order to improve the efficiency of drying, the supernatant is decanted to leave it in advance and subject the cake, that is, the settling phase containing the organic solids, to drying. Sometimes it also contains organic solids, so it needs to be treated in a separate wastewater treatment facility, and cannot be discharged to ordinary rivers as it is. Further, there is also a problem that the organic solid content adheres to a device and is burnt at the time of concentrating and drying to generate a burning odor.

On the other hand, there is an attempt to concentrate and dry the waste liquid in a vacuum tank. However, an expensive feed pump is required to transfer the waste liquid with high viscosity to the vacuum concentrating tank or the vacuum concentrating drying tank, and another heating source is required to evaporate the water to condense and dry. Increase costs and operating costs.
Further, since the waste liquid further increases in viscosity as the concentration progresses, bumping is likely to occur, but when bumping causes the organic solid content in the waste liquid to be scattered along with the mist from the vacuum concentration tank or the vacuum concentration drying tank to the vacuum exhaust system. When it mixes with the wastewater, it deteriorates the water quality. Further, since the steam exhausted under vacuum contains an alcohol content, it is not possible to discharge the steam into a general river simply by cooling and condensing it. In addition, the burnt odor generated in the vacuum concentration tank or the vacuum concentration drying tank may flow to the vacuum exhaust system.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and when the organic solid content contained in the distilled liquor waste liquid is vacuum concentrated and dried to be a fertilizer or a feed, a low equipment cost, It is possible to provide a vacuum treatment device for a distilled liquor waste liquid which can be operated at a low operating cost and can be discharged to a general river without leaving the condensed water of steam by vacuum exhaust as it is, without the need for treatment in a wastewater treatment facility. To aim.

[0007]

[Means for Solving the Problems] The above objects are provided at least for a waste liquid supply port, a heating means, a separator in which a baffle plate for capturing and separating organic solids is disposed, and the separator. A vacuum concentrating tank having a vacuum exhaust port, a waste liquid storage tank connected to the waste liquid supply port, a condenser in a distillation process of distilled liquor to which the outlet of the hot waste water is connected to the heating means, and the vacuum A vacuum pump connected to the exhaust port, and a vacuum exhaust system that is independent of the vacuum pump and is connected to the vacuum exhaust port and includes at least an ejector, a hot well, and a cooling tower,
This is achieved by a vacuum processing apparatus for a distilled liquor waste liquid, wherein the waste liquid is concentrated.

Further, the above-mentioned object is to provide at least a waste liquid supply port, a heating means, a separator in which a baffle plate for capturing and separating organic solids is disposed, and a vacuum exhaust port provided in the separator. A vacuum concentrating and drying tank having, a waste liquid storage tank connected to the waste liquid supply port, a condenser in a distillation process of distilled liquor in which the outlet of the hot waste water is connected to the heating means, and the vacuum exhaust port And a vacuum exhaust system including at least an ejector connected to the vacuum exhaust port independently of the vacuum pump, a hot well, and a cooling tower, and dried in the vacuum concentrating and drying tank. It is achieved by a vacuum treatment apparatus for a distilled liquor waste liquid, which is characterized in that a solid substance is formed.

[0009]

[Operation] Waste liquid is transferred from the storage tank to a vacuum concentration tank or a vacuum concentration drying tank, which is decompressed by a vacuum pump, with a differential pressure, and the vacuum concentration tank or vacuum concentration drying tank cools the condenser in the distillation process of distilled liquor. It is heated with the warm water discharged. In addition, the separator blocks the scattering of organic solids into the vacuum exhaust system during vacuum concentration and drying, and the cooling tower, which circulates the hot well and water, removes the alcohol contained in the water vapor evaporated by the vacuum exhaust by the ejector. Since it is vaporized, the condensed water of the vacuum exhaust system can be discharged as it is.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A vacuum processing apparatus for a distilled liquor waste liquid according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the system of a vacuum concentration / drying apparatus for shochu waste liquid according to an embodiment. That is, in this embodiment, the shochu waste liquid storage tank 110 and the vacuum concentration / drying tank 10 are generally used.
0, a condenser 151 in the distillation process of shochu, and an evacuation system 130 including the ejector 131, the hot well 132, and the cooling tower 141 as elements.

The storage tank 110 is a temporary storage tank for the shochu waste liquid discharged from the bottom of the distilling pot 150 as a pot residue after the shochu distilling, and is agitated and heated by a hot water jacket.

Vacuum concentration and drying tank 10 for concentrating and drying the waste liquid
0 is a blade 81, 82, 83 that slides on its inner wall and bottom surface.
Of the hot water jackets 21, 22, 2
Heated by 3. In addition, the waste liquid supply nozzle 1 is on the top.
1, an outlet 14 is provided on the bottom, and a separator 40 is provided on the lid. The separator 40 is provided to prevent the organic solid content in the waste liquid from being scattered by the mist to the vacuum exhaust system, and a plurality of semi-elliptical baffle plates are arranged in a zigzag pattern inside. An exhaust pipe 42 is laterally attached to the upper portion of the separator 40, and a water ejector 131 is connected to the exhaust pipe 42 via a valve 124.
An oil rotary vacuum pump 120 is connected via a valve 122. The vacuum pump 120 includes valves 111 and 112.
It is also connected to the storage tank 110 via. The bottom of the storage tank 110 and the waste liquid supply nozzle 11 in the vacuum concentration / drying tank 100 are connected via valves 113 and 115,
It is the waste liquid transfer line 114. The storage tank 110
The connection line between the upper part of the tank and the exhaust pipe 42 of the vacuum concentrating / drying tank 100 is a pressure equalizing line between both tanks and is not used in a steady state.

The shochu is produced by distilling the fermented liquid in the distillation pot 150 and storing the fraction cooled in the condenser 151 in the receiver 152. The cooling introduced into the condenser 151 through the inlet 153. Water is discharged from the outlet 154 as hot waste water of 70 to 80 ° C. In order to use this warm waste water, which was conventionally discharged, for heating the vacuum concentrating and drying tank 100, a valve 155 is used.
Through the outlet 154 and the hot water jackets 21, 22, 2
3 is connected to form a hot drainage line 157. In addition,
The valve 156 is for discharging to the outside of the system.

The vacuum exhaust system 130 ejects water, a water ejector 131, a hot well 132 that circulates water between the water ejector 131, a pump 136 and a hot well 132 that feed the water from the hot well 132 to the water ejector.
The cooling tower 141 for cooling the water of the hot well 132 and the pump 139 for feeding the water of the hot well 132 to the cooling tower 141. Hot well 13
2 make-up water line 13 to replenish water when needed
3 and a drainage nozzle 134 for discharging excess water.

The embodiment of the present invention is constructed as described above, and its operation will be described below.

It is assumed that the shochu waste liquid as a residue of the shochu distilling step is transferred from the bottom of the distillation kettle 150 to the storage tank 110 and is under atmospheric pressure. This transfer is carried out by natural flow due to the difference in position height, feeding using a feeding pump, or valves 111, 1
12 is opened and the vacuum pump 120 is operated to operate the storage tank 110.
Any method may be used, such as differential pressure transfer in which the pressure is reduced.

The waste liquid is collected from the storage tank 110 in a vacuum concentration drying tank 10
To transfer to 0, first, the valve 124 is closed, the valve 122 is opened, the vacuum pump 120 is operated to reduce the pressure in the vacuum concentration drying tank 100, and then the valves 113 and 115 are opened. The waste liquid in the storage tank 110 is transferred to the vacuum concentration / drying tank 100 via the waste liquid transfer line 114 due to the pressure difference between the storage tank 110 under the atmospheric pressure and the depressurized vacuum concentration / drying tank 100. That is, the differential pressure transfer eliminates the need for an expensive feed pump.

After the transfer of the waste liquid to the vacuum concentrating / drying tank 100 is completed, the opened valve is closed and the vacuum pump 120 is stopped, and then the drive motor 5 is operated, so that the blades 81 and 82 on the side wall and the bottom surface. , 83 starts sliding and valve 1
56 is closed and the valve 155 is opened, the hot drainage line 157 introduces the hot drainage into the hot water jackets 21, 22, 23, and the heating is started. In some cases, hot drainage is always
It may be poured into the jackets 21, 22, and 23. That is, the heating by the hot waste water eliminates the need for the hot water boiler and the fuel for operating the boiler.

Next, the valve 124 connected to the exhaust pipe 42 is opened and connected to the water ejector 131 of the vacuum exhaust system 130. By heating and evacuation, the water in the waste liquid becomes water vapor to evaporate and concentrate, and finally the organic solid content in the waste liquid is dried in the form of granules or small flakes.

During this period, the waste liquid becomes more highly viscous as the concentration proceeds, so that even if the waste liquid is sufficiently stirred, it is unavoidable that the waste liquid bumps, and the organic solid content is accompanied by the mist generated by the bumping. Will be scattered toward the vacuum exhaust system 130. However, when the organic solid content passes through the zigzag-shaped exhaust passage formed by the baffle plate in the separator 40, the organic solid content collides with the baffle plate and is captured and separated. Therefore, the organic solid content does not scatter into the vacuum exhaust system 130 and mix with the water in the hot well 132.

In this embodiment, the water ejector 131 is used in the vacuum exhaust system 130.
The water ejected from 31 is received by the hot well 132, and the water in the hot well 132 is sent to the water ejector 131 by the pump 136, and the water is constantly circulated between the water ejector 131 and the hot well 132. Further, the water in the hot well 132 is sent to the cooling tower 141 by the pump 139, cooled and returned to the hot well 132, and the water always circulates between the cooling tower 141 and the hot well 132.

The water vapor evaporated from the waste liquid by evacuation by the water ejector 131 is condensed in the water ejector 131 together with the contained alcohol, and the heat of condensation raises the temperature of the ejected water of the water ejector 131 by 3 to 5 ° C.
If left as it is, the water temperature of the hot well 132 rises and the efficiency of the water ejector 131 decreases, so that the water in the hot well 132 is cooled by the cooling tower 14.
It is cooled by 1. That is, in the cooling tower 141, a part of water is vaporized to take latent heat of vaporization, and the water is cooled. At this time, since the alcohol content is vaporized at the same time as the water and is released into the atmosphere, the hot well 13
The water in 2 is as if it had been purified by aeration. Therefore, an amount of water equivalent to the condensed water from the waste liquid is discharged from the drainage nozzle 134 of the hot well 132 as an overflow, but this drainage is left as it is, that is, to the general river without the need for treatment in the wastewater treatment facility. Can be released. The following table shows an example of the analysis value of the drainage from the hot well 132 at this time based on the JIS standard or the like. Analytical value of hot well effluent Unit pH 7.2 (20 ° C) Biochemical oxygen demand (BOD) mg / l 3.6 Chemical oxygen demand (COD) mg / l 1.4 Suspended solids (SS) mg / liter less than 5

Further, even when the exhaust has a burning odor, the odorous components are the water ejector 131 and the hot well 13.
It is dissolved in water that circulates 2 and, and almost no odor is felt from the outside.

The vacuum concentrating / drying apparatus for shochu waste liquid according to the embodiment of the present invention is constructed and operates as described above, but the present invention is not limited to this, and can be variously modified based on the technical idea of the present invention. Deformation is possible.

For example, in this embodiment, the warm waste water obtained by cooling the condenser 151 in the shochu distilling process is directly introduced into the warm water jackets 21, 22, 23 of the vacuum concentration drying tank.
A water line may be connected in the middle of the warm drainage line 157 via a flow control valve so that the temperature of the warm drainage introduced into the warm water jackets 21, 22, 23 can be adjusted.

In this embodiment, the water ejector 131 is used as the vacuum exhaust source. However, when exhaust with a high degree of vacuum is desired, the water ejector 131 may be steam-operated.
Ejectors may be combined.

Further, in this embodiment, the hot well 1
Although the cooling tower 141 is adopted to cool the water of 32, this cooler may be any type as long as it cools the water by vaporizing a part of the water and removing the latent heat of vaporization.

Further, in this embodiment, the vacuum concentrating and drying tank 100 in which concentration and drying are continuously performed in the same tank is adopted, but this may be divided into a concentrating tank and a dryer. Furthermore, even when the vacuum concentrating and drying tank 100 is used as the vacuum concentrating tank only for concentrating, the low cost, energy saving, and pollution-free technology of the present invention can be commonly adopted.

[0030]

As described above, according to the vacuum processing apparatus for a distilled liquor waste liquid of the present invention, the transfer of the waste liquid from the storage tank to the vacuum concentration tank or the vacuum concentration drying tank is performed by utilizing the differential pressure. No expensive feed pump is required, and the heating of the vacuum concentrating tank or the vacuum concentrating drying tank is performed by hot drainage that cools the condenser in the distillation process of distilled liquor, so a hot water boiler or its fuel is not required. . Furthermore, the separator provided in the vacuum concentration tank or the vacuum concentration drying tank prevents the organic solids contained in the waste liquid from scattering and mixing into the vacuum exhaust system, and the cooling tower that constitutes the vacuum exhaust system is the ejector vacuum. Since part of the condensed water of the steam generated by the exhaust gas is vaporized and the alcohol content contained in the condensed water is also vaporized, the waste water from this vacuum exhaust system can be discharged to a general river without the need for waste water treatment equipment.

In summary, if the distilled liquor waste liquid of the present invention is concentrated by the vacuum treatment apparatus, the apparatus cost and the operation cost are low, and the drainage thereof does not pollute the general river, and it is an environmental pollutant in the past. The distilled liquor waste liquor can be concentrated into liquid fertilizer or feed.

Further, if concentrated and dried by the vacuum processing apparatus of the distilled liquor waste liquid of the present invention, it is a low equipment cost, a low operating cost, and it is an environmental pollutant without polluting the general river with its drainage. The distilled liquor waste liquor is concentrated and dried, and the organic solid content contained in the liquor can be reused as a granular or small flake fertilizer or feed on a commercial basis.

[Brief description of drawings]

FIG. 1 is a diagram showing a system of a vacuum concentration / drying apparatus for shochu waste liquid according to an embodiment of the present invention.

[Explanation of symbols]

 40 Separator 100 Vacuum Concentration Drying Tank 110 Storage Tank 120 Vacuum Pump 131 Water Ejector 132 Hot Well 141 Cooling Tower 151 Condenser

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kaoru Nimura 2500 Hagizono, Chigasaki City, Kanagawa Japan Vacuum Technology Co., Ltd. (72) Inventor Masami Kuriyama 2500 Hagien City, Chigasaki City, Kanagawa Japan Vacuum Technology Co., Ltd. Inventor Jun Takahashi 2500 Hagien, Chigasaki, Kanagawa Japan Vacuum Technology Co., Ltd.

Claims (3)

[Claims] 1. A waste liquid supply port, a heating means, and
A separator in which a baffle for capturing and separating organic solids is disposed inside, a vacuum concentration tank having a vacuum exhaust port provided in the separator, a waste liquid storage tank connected to the waste liquid supply port, and A condenser in the distillation process of distilled liquor to which the outlet of the hot waste water is connected to the heating means, a vacuum pump connected to the vacuum exhaust port, and the vacuum pump are connected to the vacuum exhaust port independently. A vacuum processing apparatus for a distilled liquor waste liquid, comprising at least an ejector, a hot well, and a vacuum exhaust system including a cooling tower for concentrating the waste liquid. 2. At least a waste liquid supply port, a heating means,
A separator in which a baffle for capturing and separating organic solids is arranged, a vacuum concentrating and drying tank having a vacuum exhaust port provided in the separator, and a waste liquid storage tank connected to the waste liquid supply port, A condenser in the distillation process of distilled liquor to which the outlet of the hot waste water is connected to the heating means, a vacuum pump connected to the vacuum exhaust port, and a vacuum pump connected to the vacuum exhaust port independently of the vacuum pump. And a vacuum evacuation system consisting of a hot well and a cooling tower, which is adapted to form a dry solid matter in the vacuum concentrating and drying tank, and a vacuum processing apparatus for a distilled liquor waste liquid. . 3. The vacuum processing apparatus for the distilled liquor waste liquid according to claim 1, wherein the distilled liquor is shochu.