JPH0141444Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a continuous concentrator that continuously concentrates waste liquid that is generated as a residual liquid from a distillation pot after distillation in the manufacturing process of shochu, for example, and other distillation waste liquids. It is related to.

[Prior art and its problems] For example, in the shochu manufacturing process, the waste liquid produced as the residual liquid from the distillation pot after distillation contains impurities such as solids.
It contains about 8%. If this distillation waste liquid is concentrated and the content of impurities such as solids is reduced to about 18 to 23% (if this content exceeds 23%, it will have almost no fluidity as a liquid and will become difficult to handle).Feed It is known that the distillation waste liquid can be suitably used as a liquid, and the amount is about 1/3 to 1/4 of the amount before concentration, which has the advantage of reducing transportation costs. This has traditionally been done.

In the concentration process for reusing this shochu distillation waste liquid, since the distillation waste liquid contains many impurities such as solids as mentioned above, the conventional concentration method has mainly been a batch type evaporator or a similar one. However, the treatment efficiency was low, and the solid content in the liquid adhered to the side walls of the evaporator, stirring blades, heating tubes, etc., and scorching occurred, which eventually led to a decrease in evaporation capacity. Not only did this cause equipment failure, but it also had disadvantages, such as the concentrated liquid used for feed turning brown.

Therefore, instead of using the steam batch evaporation method,
The waste liquid circulates through a multi-tube heater equipped with many heating tubes that circulate and heat the raw waste liquid flowing in from the bottom, and a gas-liquid separator that separates and discharges the steam generated by heating and the residual concentrated liquid. At the same time, the distillation waste liquid is continuously concentrated by increasing the flow rate in the heating pipe by a concentrating device that has a circulation pump arranged in a liquid sending pipe line connected to the lower part of the heater. This is what I decided to do.

However, even in the case of such a continuous concentrator, if the flow rate in each heating tube that is arranged inside the heater and circulates and heats the raw waste liquid flowing from the bottom is not uniform, the solid content in the liquid will increase. Such impurities may adhere to the inner surface of the heating tube or cause scorching, which can significantly reduce heating efficiency. In particular, when a circulation pump is provided below the heater as described above, in other words, as shown in Fig.
Even when the flow rate is increased by actively sending liquid into A', the diameter of the body of heater A' is quite large and the inlet part a' is wider than the inlet, so the inflow liquid flows into the surrounding area. If the heating tubes 5' are not dispersed, the flow velocity will be high in the central tube of the large number of heating tubes 5' and slow in the peripheral tubes, which may cause variations in the heating state. In heating tubes with a slow flow rate, contaminants such as solids in the liquid tend to adhere and burn, resulting in lower heating efficiency and problems such as the inability to perform continuous concentration processing. arise.

In view of the above, the present invention is a continuous concentrator for distillation waste liquid such as shochu, which distributes the raw waste liquid fed into the heater by a pump over the entire area inside the heater, and uses a large number of tubes arranged inside the heater. It is an object of the present invention to provide an apparatus that can make the flow velocity in each heating tube substantially equal and can perform efficient and good concentration processing over a long period of time.

[Means for Solving the Problems] In order to solve the above-mentioned problems in a continuous distillation waste liquid concentrating device, the present invention uses an inflow section at the lower part of the heater to rapidly disperse the inflow liquid throughout the body. We decided to provide a dispersion means to do so.

That is, the concentrating device of the present invention is a multi-tube system in which a large number of heating tubes are vertically arranged in the body, and the raw waste liquid flowing from the lower part is heated while flowing through the heating tubes and rising, and then sent out from the upper part. a gas-liquid separator that is equipped to circulate the liquid sent from the heater to the heater and separate and discharge steam generated by heating and residual concentrated liquid; and a lower part of the heater. A continuous concentration device comprising a circulation pump disposed in a liquid sending pipe connected to the heater, and an inflow section in the lower part of the heater is provided with a circulation pump that distributes the inflow liquid from the pump throughout the interior of the body. It is characterized by being equipped with a dispersion means for causing

The above-mentioned dispersion means is one in which an inverted cone-shaped dispersion plate is disposed in the center of the outflow side opening of a drum-shaped cylinder whose diameter is expanded in a tapered manner on the inflow side and the outflow side. It is preferable that the outflow side opening area is 1/2 or less of the inflow side opening area.

[Function] According to the present invention described above, the raw waste liquid sent to the liquid sending pipe connected to the lower part of the heater is actively sent into the heater by the discharge action of the pump,
It flows through a number of heating tubes in the heater and rises, is sent out from the upper part and flows into the gas-liquid separator, and then is sent back into the heater by the pump through the liquid sending pipe and is circulated. be forced to be carried away. While circulating in this way and flowing through the heating tube, it is heated by heated steam etc. supplied around the heating tube.

Therefore, in the case of the present invention, the inflow liquid that is forcefully sent into the heater from below by the discharge action of the pump passes through the dispersion means installed in the inflow section at the lower part of the heater, and is then distributed to the central part of the heater. It is rapidly dispersed throughout the interior of the body, and therefore, even when the flow velocity in each heating tube in the body is relatively high, the flow rate is almost uniform, and therefore, not only is there no variation in the degree of heating by each heating tube, but also Contaminants such as solids in the liquid do not adhere to the inner surface of the heating tube, and scorching does not occur, allowing good heating over a long period of time.

[Example] Next, an example of the present invention will be described based on FIGS. 1 and 2.

Reference numeral A is a multi-tubular heater, in which a heating chamber 4 is provided in the body 1, which is partitioned by upper and lower partition walls 2 and 3, into which heated steam flows as a heating source, and the heating chamber 4 is separated by upper and lower partitions. A large number of heating tubes 5 penetrating in the direction and opening upward and downward are arranged by welding the upper and lower ends to the partition walls 2 and 3, respectively, and the raw waste liquid flowing from the lower part flows through the heating tubes 5. It is designed to heat up as it rises. Reference numeral 6 indicates an inflow pipe for heating steam into the heating chamber 4, and reference numeral 7 indicates a drain pipe. Reference numeral 8 denotes a heated liquid outflow pipe, which is connected to a position above the upper partition wall 2.
Reference numeral 9 denotes a liquid supply pipe line connected to the lower part of the heater A. The liquid supply pipe line 9 is equipped with a pump P for circulation, and the pump P pumps the waste liquid to the heater A.
It is designed to be able to be sent inside.

Reference numeral 10 denotes a dispersing means installed in the inflow section a at the lower part of the heater A, which rapidly disperses the waste liquid sent from the lower part by the pump P throughout the entire body part 1 to approximately reduce the flow rate of each heating tube 5. It is designed to be even. This dispersion means 10 may be any means as long as it can disperse the inflow liquid throughout the entire area inside the heater, but the second
As shown in the enlarged view in FIG. 3 and FIG.
is arranged so that the liquid flowing in from the lower part can be dispersed around the periphery, especially one in which the opening area on the outflow side of the dispersion means 10 is 1/2 or less of the opening area on the inflow side in the above structure. Suitably used. Note that supporting means such as stays for arranging the dispersing means 10 are not illustrated and described.

B is a gas-liquid separator connected to the heater A via an outflow pipe 8, and a liquid supply pipe 9 to the heater A is connected to the lower end of the gas-liquid separator B. It is provided so that the inflow liquid from the heater A can be circulated and sent by a circulation pump P arranged in the liquid sending pipe line 9. Reference numeral 14 denotes a feed pipe for raw waste liquid from the shochu distillation process, etc., and is connected to the liquid feed pipe line 9. 1
Reference numeral 5 denotes a discharge pipe provided so as to overflow when the residual concentrated liquid temporarily stored in the gas-liquid separator B exceeds a certain level. Reference numeral 16 denotes a steam exhaust passage connected to the upper part of the gas-liquid separator B, through which steam generated by heating by the heater A is discharged. Gas-liquid separator B
A plurality of baffle plates 17 are provided at the upper part of the interior to prevent splashes and liquid from being discharged due to boiling. In addition, a cyclone type collector S is disposed in the steam discharge path 16, and serves to remove impurities such as solids contained in the steam together with the liquid component and to assist in gas-liquid separation. There is. 18 is a return pipe for the removed liquid, etc., and is connected to the liquid sending pipe line 9.

T1 and T2 are storage tanks for concentrated liquid, and are connected to the discharge pipe 15 so that the concentrated liquid discharged from the gas-liquid separator B via the distributor t can be collected and stored. VP is the storage tank T1, T2
This is a vacuum pump connected to the storage tanks T1 and T2, and is provided so that the pressure and vacuum can be reduced toward the storage tanks T1 and T2.

C is a condenser connected to the steam discharge path 16 from the gas-liquid separator B, which cools and condenses the steam discharged through the collector S, and T3 is a tank that collects and stores the condensed drain. . The vacuum pump VP is also connected to this tank T3. 1
9 is a cooling water pipe, and 20 is a cooling tower for cooling water.

To explain the state of concentration processing of distillation waste liquid by the continuous concentrator with the above configuration, the raw waste liquid is fed by a pump as needed and enters the liquid feed pipe line 9 to the heater A. It is actively sent to the lower part of the heater A by the discharge action of the pump P provided in the passage 9, and normally flows through the numerous heating tubes 5 in the heater A.
As the flow increases at a flow rate of about 0.1 to 1.0 m,
The liquid flows into the gas-liquid separator B through the outflow pipe 8, and then is sent into the heater A again by the pump P through the liquid sending pipe 9, where it is circulated. Further, heating steam is fed into the heating chamber 4 in the heater A as a heating source, so that the raw waste liquid is circulated as described above and is heated while repeatedly flowing through the heating tube 5. Due to this heating, the water in the raw waste liquid gradually evaporates. However, the heater A
Since the liquid inflow section a in the lower inner part is equipped with a dispersion means 10, the inflow liquid that is forcefully sent into the heater A from below by the discharge action of the pump P does not pass through the dispersion means 10. It is rapidly dispersed from the center to the entire interior of the torso. For example, when equipped with a dispersion means 10 as shown in the figure,
The inflowing liquid passes through the drum-shaped cylinder 11, hits the inverted cone-shaped dispersion plate 13 disposed at the outflow side opening 12, is dispersed, and flows out, thereby being dispersed from the center of the body to the periphery. Therefore, even when the flow velocity in each heating tube 5 in the heater A is relatively fast, it is maintained substantially uniformly. Therefore, contaminants such as solids in the liquid may adhere to the inner surface of the heating tube,
Maintains good heating conditions without causing burning.

When the amount of liquid accumulated in the gas-liquid separator B exceeds a certain level, the residual concentrated liquid concentrated by the evaporation is discharged from the discharge pipe 15, and sent to the storage tanks T1 and T2 by the distributor t, where it is stored. Further, the vapor discharged from the upper part of the gas-liquid separator B is sent to the condenser C via the collector S through the discharge passage 16, and is stored in the tank T3 as a drain.

In the above embodiment, a case is shown in which a set of devices is constructed by combining the heater A, the gas-liquid separator B, the circulation pump P, the collector S, etc.; It is also possible to connect a plurality of apparatuses in sequence and combine them so that the waste liquid to be treated is sequentially sent to each set of apparatuses for concentration treatment.

[Effects of the invention] As described above, according to the invention, as a continuous concentration device for distillation waste liquid, the raw waste liquid sent into the heater by the pump can be rapidly dispersed throughout the heater, and Since the flow velocity in each of the many heating tubes arranged in the liquid can be made approximately equal, not only will there be no variation in the degree of heating by each heating tube, but also it will prevent contaminants such as solids in the liquid from adhering to the inner surface of the heating tubes. It is possible to efficiently maintain a good heating condition for a long period of time without burning or burning, and it is possible to efficiently concentrate shochu distillation waste liquid and the like.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted enlarged sectional view of the heater portion showing an embodiment of the present invention, Fig. 2 is a schematic front view of the entire device, Fig. 3 is an enlarged perspective view illustrating the dispersion means, and Fig. 4. 1 is an enlarged sectional view of a part of the heater part without dispersion means; FIG. A... Heater, 1... Body, 5... Heating tube, 9
...Liquid sending pipe line, B... Gas-liquid separator, P... Circulation pump, S... Collector, 10... Dispersion means, 11
...Trumpet-shaped cylinder, 12...Outflow side opening, 13...
Inverted conical distribution plate, T1, T2...storage tank,
VP...Vacuum pump.

Claims (1)

[Claims for Utility Model Registration] 1. A large number of heating tubes are arranged vertically in the body,
A multi-tube heater that heats the raw waste liquid flowing in from the lower part as it flows through the heating tube and as it rises and sends it out from the upper part, and a multi-tube heater that allows the liquid discharged from the heater to be circulated to the heater. Continuous concentration system, which is equipped with a gas-liquid separator that separates and discharges the steam generated by heating and residual concentrated liquid, and a circulation pump that is installed in a liquid supply pipe connected to the bottom of the heater. 1. A continuous concentration device for distillation waste liquid, characterized in that the inflow section in the lower part of the heater is equipped with dispersion means for dispersing the inflow liquid from the pump throughout the interior of the body. 2. Utility model registration claim 1, in which the dispersion means is an inverted cone-shaped dispersion plate disposed in the center of the outflow side opening of a drum-shaped cylinder whose diameter is expanded in a tapered manner on the inflow side and outflow side. Continuous concentration device for distillation waste liquid as described in Section 2. 3 Scope of claim 2 for utility model registration where the outflow side opening area of the dispersion means is less than 1/2 of the inflow side opening area
Continuous concentration device for distillation waste liquid as described in Section 2.