JPS62208266A - Vacuum and continuous concentrating treatment apparatus for distillation waste liquor of shochu (low-class distilled spirit) - Google Patents

Abstract

PURPOSE:To make it possible to effectively carry out concentrating treatment, by continuously concentrating a distillation waste liquor of SHOCHU (low-class distilled spirit) in each concentration apparatus and utilizing steam generated in the heat treatment as a heat source for the succeeding heaters one after another. CONSTITUTION:Plural concentration apparatuses (A1)-(A3) and gas-liquid separators (B1)-(B3) are connected and combined one after another. Pumps (P1)-(P3) are provided in liquid feed pipes 9 connected to the bottom of each heater and many heating pipes 5 for flowing a distillation waste liquor of SHOCHU (low-class distilled spirit) are provided in the interior of the heater. The diameter of the heating pipes 5 is set in relation to the above-mentioned pumps (P1)-(P3) so that the flow velocity in the heating pipes 5 may be 0.1-1.0m/sec. Concentration while heating is successively carried out in each concentration apparatus and the concentrated liquid is then fed into the succeeding concentration apparatuses at the same time. The generated steam is fed for utilization as a heat source for the succeeding concentration apparatuses to carry out continuous concentration treatment. As a result, the concentration treatment of the distillation waste liquor of the SHOCHU can be efficiently carried out without causing sticking of solid materials, etc., or scorching.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vacuum continuous concentration treatment device for so-called shochu shochu distillation waste liquid, which is discharged as distillation pot residual liquid after distillation in the shochu manufacturing process. .

[Conventional technology and its problems] The waste liquid discharged as the residual liquid from the distillation pot after distillation in the shochu manufacturing process contains about 5 to 8% of impurities, and the BOD, which indicates the pollution index due to discharge, is Both have very high COD values, and therefore, there is currently no suitable treatment method for disposing of the waste liquid other than by dumping it at sea.

On the other hand, if the shochu distillation waste liquid is concentrated to reduce the content of impurities such as solids to about 18 to 23% (if concentrated so that the content of solids etc. is 23% or more, it will become a liquid) Since the fluidity of the material is almost gone and it becomes difficult to remove the plate,
% is said to be the upper limit of concentration), and it is known that it can be suitably used as feed for livestock, etc. In addition, since the concentration is 1/3 to 1/4 of that before concentration, there are benefits such as reduced transportation costs.

However, when concentrating shochu distillation waste liquid for reuse, etc., as mentioned above, there are many impurities such as solids in the Tsubame distillation waste liquid, so conventionally a concentration process was used and heated in a pot. A method of evaporating water using a batch-type evaporator equipped with steam heating tubes, stirring blades, etc. or similar means has generally been used.

However, in this case, solid content in the liquid may adhere to the side walls of the evaporator, stirring blades, heating tubes, etc., especially at the boundary between the liquid surface and the upper space in the evaporator, or cause scorching.
Not only does this ultimately lead to a decrease in evaporation capacity and equipment failure, but the concentrate used for feed often turns brown, resulting in a decrease in product value. Furthermore, due to the occurrence of adhesion and burning as described above, it is necessary to perform removal treatment frequently, resulting in poor efficiency of evaporation treatment, and continuous evaporation has been almost ignored.

In view of the above, it is an object of the present invention to provide a continuous concentration treatment device that can continuously and efficiently concentrate shochu distillation waste liquid without causing adhesion of solids or burning. be.

[Means for Solving the Problems] In order to solve the above problems, the vacuum continuous concentrator for shochu distillation waste liquid of the present invention has the following configuration.

It is equipped with a heater that heats the shochu distillation waste liquid that flows in from the bottom and sends it out from the top, and a gas-liquid separator that is connected so that the liquid sent from the heater can be circulated to the heater. A concentrating device that separates and discharges steam generated by heating and residual concentrated liquid from a gas-liquid separator is installed in two to four
These concentrators are connected in sequence and combined.
The concentrated liquid discharged from the gas-liquid separator of each device except the last one is connected to the liquid feed pipe to the heater of the succeeding device, and the generated steam is connected to be supplied as a heating source for the succeeding heater. can be,
Furthermore, a storage tank is provided to collect the concentrated liquid discharged from the gas-liquid separator of the rearmost device, and a vacuum pump is provided to reduce the pressure of the liquid distribution path toward the recovery side.

The feed pipe connected to the lower part of each heater is equipped with a pump for liquid circulation, and inside the heater is equipped with a large number of heating pipes for circulating waste liquid. Is the flow velocity 0.1 to 1.0 per second? The diameter of the heating tube is set in relation to the pump so that FL. for example,
It is particularly preferable that the heating tube has a diameter of about 50 to 150 mm.

[Write] Explain the action by the present invention with the above configuration, the shochu swallow that was transmitted to the fluid pipe to the heating tube in the first concentrated device from the shochu's swallow reservoir. The liquid is actively sent to the lower part of the heater by a pump for circulating the liquid installed in the liquid sending pipe, circulates through the heating pipe inside the heater, moves up and down, and is initially discharged from the upper part to form a gas-liquid component -1. flows into the vessel,
The liquid is sent back to the heater from the liquid sending pipe, and is then circulated by the pump. During this circulating flow, the waste liquid is heated by heating steam, which is a heating source, supplied around the heating tube in the heater, and as a result, a portion of the water in the waste liquid evaporates, and the liquid is gradually concentrated. At the same time, the vapor and concentrated waste liquid are separated in a gas-liquid separator and discharged.

The steam discharged from the gas-liquid separator as described above is sent to the heater as a heating source for the second concentrator, and is sent around the heating tube, where it is condensed to some extent and separated into gas-liquid. The remaining concentrated waste liquid discharged from the container is sent to the liquid sending pipe to the heater connected to the next concentrating device, and is also sent into the heater by the liquid circulation pump, and then heated to the heater in the same way as above. and a gas-liquid separator, during which time the water is heated in a heater using the steam sent from the previous concentrator as a heat source, and a portion of the water evaporates, resulting in the remaining water being evaporated. The concentrated waste liquid is further concentrated, and the concentrated waste liquid and the vapor are separated and discharged from the gas-liquid separator.

In this way, heating and concentration are carried out in each concentrator in sequence, and the concentrated liquid is sequentially sent to the subsequent concentrators, and the generated steam is sent to the subsequent concentrators to be used as a heating source. The concentrated liquid containing approximately 18 to 23% of solids and other impurities is discharged from the final concentration device and stored in a storage tank.

Therefore, in each of the above-mentioned concentrators, the waste liquid being treated is actively sent to the heater by the liquid circulation pump installed in the liquid sending pipe to the heating tube, and the waste liquid is actively sent to the heater. Since the diameters of the multiple heating tubes are set so that the flow rate of the liquid in the heating tubes is approximately 0.1 to 1.0 m/s, the liquid in the heating tubes is maintained in a sufficiently fluid state. There is no stagnation, and therefore no adhesion or scorching of solids contained in the liquid occurs.

Furthermore, 2 to 4 sets of concentrators with the same heating method are connected, and the flow path of the waste liquid to be treated is maintained at a reduced pressure state toward the recovery side using a vacuum pump. As mentioned above, although the flow rate in the heating tube of the heater is high and the steam generated in each concentrator is used as a heating source for the heater in the subsequent concentrator, each heater is sufficiently heated to the boiling point. It can be heated and can be sufficiently evaporated and concentrated.

[Example] Next, embodiments of the present invention will be described based on the drawings.

Figure 1 shows three sets of concentrators 1. This shows an example in which A2 and I are connected in sequence, and in the same figure, (81) (A2
) (A3) are multi-tubular heaters, and each body (1) has a heating chamber (1) partitioned by upper and lower partition walls (2) and (3) into which heated steam flows as a heating source. 4) are provided, and a large number of heating tubes (5) vertically penetrating the heating chamber (4) and opening upward and downward are welded at their upper and lower ends to the partition walls (2) and (3), respectively. The waste liquid flowing from the bottom is heated while flowing through the heating pipe (5) and rising.

Heating tubes (5) in each of the heaters (AI) (A2) (83)
), the flow rate in the heating tube is 0.1 to 1.0 T per second in relation to the diameter of the tube and the output of the liquid circulation pump described later.
rL1 is preferably set to be about 0.2 to 0.5 m, and in particular, a diameter of about 50 to 1501 a, especially about 50 to 100 shoes, is preferably used. If the flow rate in the heating tube (5) is slower than the above-mentioned speed, there is a risk of adhesion or scorching of solid content, etc. If the diameter is smaller than the above, it will still burn,
It is undesirable that clogging is likely to occur, and if the diameter is larger than the above, a larger pumping capacity is required and the heating efficiency becomes worse.

(6) shows the inflow pipe for heated steam to the heating chamber (4) in the first concentrating device (2), and (7) shows the drain pipe that goes into each device. (8) is an outflow pipe for heated waste liquid, and is provided at a position above the upper partition wall (2). (
9) is a liquid feeding pipe connected to the lower end of each heater (AI) (A2) (A3).

(81) (B2) (B3) are the outflow pipes (8), respectively.
) A gas-liquid separator connected to the heater (AI) (A2) (A3) via the gas-liquid separator (81) (B2)
The heater (AI) (A2) (A3) is attached to the lower end of (83).
) to the gas-liquid separator (8).
1) It is configured so that the waste liquid flowing into (82) and (83) can be circulated.

(Pl) (P2) (P3) are liquid circulation pumps installed in the liquid sending pipes (9) to the heaters (A1), (A2), and (A3) in each of the above-mentioned concentrators;
l) It is provided so that the waste liquid to be treated can be actively circulated by the pressure feeding action of (P2) and (P3).

A feed pipe (10) for the raw waste liquid from the shochu tsubame distillation process is connected to the liquid feed pipe (9) in the first concentration device.

(11)) are the aforementioned gas-liquid separators (B1) (B2) (B3
) is a discharge pipe that is installed to overflow when the remaining concentrated liquid stored in the container exceeds a certain level. (12) is a steam discharge path connected to the upper part of the gas-liquid separation 1 (81) (B2) (B3), through which steam generated by heating by the heaters (AI) (A2) (A3) is discharged. . Further, a plurality of baffle plates (13) are provided at the upper part of each of the gas-liquid separators (B1), (82), and (B3) to prevent splashing due to boiling and discharge of liquid components. In addition, a knife-type collector (St) (32) (B3) is provided in a part of the steam discharge path (12) to remove solids and other substances contained in the steam together with liquid components. It is designed to assist in gas-liquid separation.

(14) is a return pipe for the removed liquid, etc., and is connected to the liquid sending pipe (9).

Of the three sets of concentrators with the above configuration, the first
2nd and 2nd concentrator engineer.

The discharge pipes (11) of the concentrated waste liquid from the gas-liquid separators (B1) and (B2) of (2) are connected to the subsequent second and third concentrators 1. I[I is connected to the liquid sending pipe (9) to the heater (A2) (83) in It is configured to be connected so that it can be further concentrated. In addition, the steam exhaust path (12) from the gas-liquid separators (81) (82) of the concentrators I and If
) are the heaters (A
2) It is connected to the heating chamber (4) of (A3) and configured so that the exhaust steam can be used as a heating source for the subsequent concentrator.

(TI) (T2) is a storage tank for concentrated liquid, and the gas-liquid separator (B
3) It is connected to the discharge pipe (11) so that the concentrated liquid sent out via the distributor (t3) can be collected and stored.

(vp) is a vacuum pump connected to the storage tanks (Tl) (T2), and connects the waste liquid distribution route of each concentrator I to
) The closer the concentrator is to the rear, the lower the boiling point is.

(C) is a condenser connected to the steam discharge path (12) from the gas-liquid separator (B3) of the concentrator (■) at the end, which cools and condenses the steam discharged through the collector (B3). (3) is a tank for collecting and storing the drain. (15) is a cooling water pipe, and (16) is a cooling water cooling tower for circulating cooling water for cooling.

Furthermore, in the case of the illustrated embodiment, the heaters (A1) (A2
) (A3) is equipped with a dispersion means (17) in the lower inlet part, which rapidly disperses the waste liquid sent from the lower part by the pumps (Pl), (P2), and (P3), and adjusts the flow rate of each heating tube (5). It is provided to make the values approximately equal. The dispersion means (1
1) The inflowing waste liquid is heated by heaters (A1) (A2).
(A3) Any material that can be dispersed over the entire area is acceptable, but for example, as shown in Figure 2, the inflow and outflow openings are shaped like a drum with enlarged diameters, and a dispersion plate is placed in the center of the outflow opening. A device is used that is provided so that the waste liquid flowing from the bottom can be dispersed.

Therefore, the state of concentration processing of shochu Tsubame distillery waste liquid by the vacuum continuous concentrator of the present invention having the above-mentioned configuration will be explained as follows.
The raw waste liquid with a solids content of about 5 to 8% is sent by the pump (P4) as needed to the heater (AI) in the first concentrator from the feed pipe (10). The pump (P) connected to the liquid feeding pipe (9)
l) into the lower part of the heater (A1), flows through the internal heating tube (5) at a flow rate of 0.1 to 1.0 m/sec, rises, and passes through the outflow tube (8). The liquid flows into the gas-liquid separator (81), and is sent to the heater (81) by the pump (Pl) through the liquid sending pipe (9), where it is circulated. Also said heating! ! Heating tube (5) in (A1)
) Heated steam at a gauge pressure of 3 to 4 Ky/d and a temperature of about 140 to 150°C is fed as a heating source into the heating chamber (4) around the heating tube (5). ) is heated to about 90 to 100° C. as it passes through the waste liquid repeatedly, and the water in the raw waste liquid gradually evaporates due to this heating.

In the gas-liquid separator (B1), when the liquid m accumulated inside the gas-liquid separator (B1) reaches a certain level or more, the waste liquid concentrated by the evaporation to a solid content of about 10 to 11% is discharged to the discharge pipe (11).
A liquid sending pipe (
9), and is supplied to the liquid circulation pump (P2) in the same way as above.
) into the heater (A2), heating fa
(A2) and the gas-liquid separator (12). On the other hand, the vapor discharged from the discharge passage (12) at the upper part of the gas-liquid separator (B1) is passed through the collector (Sl) to the heating chamber (4) in the heater (A2) of the subsequent concentrator (2).
) and used as a heating source for the heater (A2), and the concentrated waste liquid flowing through the heating tube (5) is heated. In particular, the waste liquid distribution route from each concentrator is evacuated toward the rear by a vacuum pump (VP), so
In this second concentrator, the waste liquid is boiled by heating to about 70° C., thereby further evaporating water in the waste liquid and concentrating it. Then, the waste liquid discharged from the discharge pipe (11) of the gas-liquid separator (B2) and concentrated to a solid content of about 14 to 15% is further transferred to the liquid sending pipe of the third concentration device (■). (9), is fed into the heater (A3) by the pump (P3) in the same way as above, and is circulated between the heater (A3) and the gas-liquid separator (B3). It will be done.

Further, the steam discharged from the upper part of the gas-liquid separator (B2) is sent into the heating chamber (4) of the heater (83) via the collector (B2) and used as a heating source. By this heating, the waste liquid flowing and circulating in the heating tube (5) is heated to about 50° C. under reduced pressure by a vacuum pump (VP), and boils to evaporate water. The concentrated liquid, which has been concentrated in this way and has a content of impurities such as solids of about 18 to 23%, is discharged from the discharge pipe (11) and sent to the storage tank (TI) (T2) by the distributor (t3). is stored. Further, the vapor discharged from the upper part of the gas-liquid separator (B3) is sent to the condenser (C) via the collector (B3) by the discharge path (12), and is condensed in the condenser (C). It becomes a drain and is stored in the tank (■3).

The shochu hot-temperature waste liquid is continuously concentrated as described above. pump (PI
) (P2) (P3) are provided, and the waste liquid to be treated is actively sent to the heaters (A1) (A2) (A3), and the waste liquid in each heater (A1) (A2) (A3) is In the heating tube (5), the flow rate in the tube is 0.1 to 1.0 per second.
Since the tube diameter etc. are set to be approximately 1.5 m, the liquid does not stagnate in each heating tube (5), and solid content in the waste liquid is prevented from sticking or burning. Moreover, even if the flow rate in the heating tube (5) is high as described above, the vapor generated in each concentrator is sequentially transferred to the heater (A) in the subsequent concentrator.
1) Despite being used as a heating source for (A2) and (A3), by vacuuming the distribution route with a vacuum pump (VP), each heater can sufficiently heat up to the boiling point and perform sufficient evaporation and concentration processing. Become.

[Effects of the Invention] As described above, according to the present invention, it is possible to continuously concentrate the incineration-proof steaming/distillation liquid, and the steam generated by the heat treatment can be sequentially used as a heating source for the subsequent heaters, thereby improving efficiency. It is possible to carry out a good concentration treatment, and the concentrated liquid thus concentrated has a content of impurities such as solids of about 18 to 23%, and can be used satisfactorily for 8 ingredients.

Of course, the flow rate in the heating tube is fast, so the waste liquid does not accumulate in the heating tube, and solid content does not stick or burn, so the recovered concentrated liquid does not discolor to brown or the like. A concentrate with high commercial value for use as feed etc. can be obtained, and conventional problems can be solved.

[Brief explanation of drawings]

FIG. 1 is a schematic front view of the entire device showing an embodiment of the present invention;
FIG. 2 is a partially enlarged sectional view. (AI) (A2) (A3)... Heater, (5)...
Heating tube, (B1) (82) (B3)... gas-liquid separator,
(9)...Liquid feeding pipe, (11)...Concentrated liquid discharge pipe,
(12)...Steam exhaust path, (81) (S2) (S3)
... Collector, (PI) (P2) (P3) ... Pump for liquid circulation, (VP) ... Vacuum pump, (TI) (1
2)...Storage tank. Patent applicant: Chemical Plant Co., Ltd. Figure 2

Claims (1)

[Claims] 1. A heater that heats the shochu distillation waste liquid that flows in from the bottom and sends it out from the top, and a gas-liquid separator that is connected so that the liquid sent from the heater can be circulated to the heater. 2. A concentrating device comprising: 2, which separates and discharges evaporated gas and concentrated liquid from a waste liquid that is circulated and heated through a gas-liquid separator;
~4 sets are connected and combined in sequence, and each of these concentrators sends the concentrated liquid discharged from the gas-liquid separator of each device except the last one to the liquid sending pipe to the heater of the succeeding device, and also to the evaporator. A storage tank is connected to supply gas as a heating source for the subsequent heater, and a storage tank is connected to collect the concentrated liquid discharged from the gas-liquid separator of the last device, and a liquid distribution path is connected to the recovery side. In the vacuum continuous concentration processing equipment, which is equipped with a vacuum pump that reduces the pressure as much as It is characterized in that it is equipped with a large number of heating tubes for the flow, and the diameter of the heating tubes is set in relation to the pump so that the flow velocity in the heating tubes is 0.1 to 1.0 m per second. Continuous vacuum concentration processing equipment for shochu distillation waste liquid. 2. The reduced-pressure continuous concentration treatment apparatus for shochu distillation waste liquid according to claim 1, wherein the diameter of the heating tube is set to 50 to 150 mm.