JP3924680B2 - Concentrator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
This invention includes fats and oils such as fatty acids, various beverage foods such as soups and juices, pharmaceuticals such as various vitamins and antibiotics, various synthetic resins such as polypropylene, petrochemical products such as various synthetic rubbers, waxes and detergents, etc. Concentration devices widely used for heat treatment such as evaporation and concentration, and treatment of wastewater and waste liquid, especially heat-sensitive materials such as heat-sensitive materials, high-viscosity materials, high-boiling-point materials, or materials that easily cause scaling. The present invention relates to a concentrating device that is optimal for the above.
[0002]
[Prior art]
An example of a conventional concentrating device is shown in FIG. The concentrating device 21 includes a horizontal drum 22 having a jacket 23 provided on an outer peripheral wall surface, a rotary shaft 24 that is rotatably provided through the shaft center of the drum 22, and a drum 22 of the rotary shaft 24. And a rotary blade 25 fixed in position. The rotating shaft 24 is connected to the motor 29 via the transmission mechanism 27 and rotated, and the shaft penetrating portion where the rotating shaft 24 penetrates into the side wall of the drum 22 is sealed with a bearing / shaft sealing portion 26.
[0003]
Therefore, when the heating medium is supplied from the heating medium inlet 32 to the jacket 23 to heat the drum 22 and the stirring blade is rotated while supplying the processing liquid from the supply port 30, the processing liquid is subjected to centrifugal force by the rotation of the stirring blade 25. The processing liquid supplied in contact with the inner wall surface of the drum 22 is sequentially moved toward the outlet 31 and finally pushed out to the outlet 31. At this time, since the inner wall surface of the drum 22 is heated by the heat medium supplied to the jacket 23, the water in the treatment liquid is evaporated and concentrated.
Conventionally, the heating means of the concentrator 21 having such a configuration is generally a jacket 23 provided on the outer peripheral wall surface of the drum 22 as shown in FIG. 6 (see, for example, Patent Document 1).
[0004]
In addition, the drum 22 is formed by a main body barrel 22a and a vapor barrel 22b. If the vapor barrel 22b is not heated, the vapor condenses and impairs the original function, so the vapor barrel 22b is also heated. Conventionally, the heating means for the vapor barrel 22b is also the jacket 23.
[0005]
[Patent Document 1]
Japanese Examined Patent Publication No. 61-23471 (page 2, right column, pages 13 to 15; FIGS. 2 and 3)
[0006]
[Problems to be solved by the invention]
However, if the heating means of the concentrator is a jacket as in the prior art, the jacket is provided on the outer peripheral wall surface of the drum, and the heat medium supplied to the jacket directly heats the outer peripheral wall surface of the drum. For this reason, there is a problem that a substance that is sensitive to heat in the treatment liquid is heated too much to blacken or carbonize.
[0007]
In particular, although depending on the viscosity of the processing liquid, it is an unavoidable phenomenon that the processing liquid overruns and scatters to the vapor barrel because the stirring blades rotate at high speed in the drum. It adheres to the inner wall surface (heating surface) of the trunk. At this time, since the scattered processing liquid is heated strongly by the heating surface (inner wall surface) directly heated by the jacket, it adheres and solidifies inside the vapor barrel and grows. The deposits and solids that have grown up cause problems such as blockage of the exhaust system and increase in stirring power.
[0008]
The present invention has been proposed in order to solve such a problem, and the object of the present invention is to firstly make a thin film by the rotation of the stirring blades, to be stirred in contact with the heating surface, and to quickly evaporate. , Enabling heat treatment for concentration, secondly, avoiding blackening or carbonization even with heat-sensitive processing liquids, and third, fixing and solidification even if the processing liquid scatters on the vapor barrel side Therefore, the present invention provides a concentration apparatus that solves the problem of the occurrence of the problem.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, a concentrating device of the present invention includes a drum having a heating means provided on the outer periphery, a rotating shaft that is rotatably supported through the drum, and the rotating shaft at a position in the drum. A stirring blade fixed with a small gap between the inner peripheral wall surface of the drum and the processing liquid supplied from the supply port into the drum is rotated by the rotating stirring blade. A concentration device that is gradually flown in the direction of the outlet while contacting as a thin film along the peripheral wall surface, is heated and evaporated, and moisture is adjusted and discharged from the outlet,
The drum is composed of a main body barrel located on the treatment liquid supply port side and a vapor barrel located on the outlet side,
The heating means is a jacket provided on the outer peripheral wall surface of the drum on the main body side, and a heat transfer tube in which the vapor drum side is disposed on the outer periphery of the drum with a certain distance from the outer peripheral wall surface of the drum. To do.
[0010]
As a result, the treatment liquid in the drum can be moved as it is in contact with the heating surface (inner wall surface) of the drum as a thin film by the rotating stirring blades, and the moisture can be adjusted to a predetermined concentration. At this time, since a jacket is provided on the outer peripheral wall surface of the drum on the main body barrel side as a heating means, the heating temperature of the heating surface of the drum inner surface on the main body barrel side is set to a high temperature, and a thin film of the processing solution is used on the heating surface. The moisture concentration can be adjusted to a predetermined concentration by moving while contacting, and a heat transfer tube is provided on the vapor drum side on the drum outer periphery with a constant distance from the drum outer peripheral wall surface. Since the medium is supplied and heated, the blackening and carbonization of the processing liquid does not occur, and the processing liquid scattered on the vapor barrel side does not stick and solidify. Moreover, since the vapor | steam trunk | drum is kept warm moderately, vapor condensation does not occur.
[0011]
Moreover, the concentrating device of the present invention is characterized in that the interval between the heat transfer tube and the outer peripheral wall surface of the drum can be adjusted.
Thereby, the space | interval with the drum outer peripheral wall surface of a heat exchanger tube is adjusted, and it becomes possible to adjust the heating temperature which heat-transfers from a heat exchanger tube to a drum outer peripheral wall surface.
[0012]
Moreover, the concentration apparatus of this invention is characterized by the said stirring blade being a long plate shape.
As a result, rotation of the stirring blade causes the thin film of the processing liquid to flow and move along the drum inner peripheral wall surface (heating surface) by centrifugal force and a slight gap between the stirring blade and the drum inner peripheral wall surface. Can do. In particular, if the stirring blade is a long plate, a thin film of the treatment liquid can be formed reliably, and the thickness of the thin film can be adjusted by adjusting the width of the gap.
[0013]
In the concentration apparatus of the present invention, the stirring blade is provided with an inclined blade that moves the processing liquid in the outlet direction by rotation.
As a result, the treatment liquid (contents) in the drum forms a thin film on the inner wall surface of the drum by the rotation of the stirring blade, is heated and evaporated, and is reliably sent out in the outlet direction while being concentrated and adjusted.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. 1 is a partially cutaway front view of a concentrating device showing an embodiment of the present invention, FIG. 2 is a side view of the concentrating device showing an embodiment of the present invention, and FIG. 3 is a sectional view taken along the line AA in FIG. FIG. 4 is an enlarged cross-sectional view of a portion B in FIG. 3.
The concentrating device 1 shown in this drawing includes a drum 2 provided with a heating means on the outer periphery, a rotating shaft 4 penetrating the shaft core of the drum 2 and rotatably supported by a shaft seal / bearing portion 16, And a stirring blade 5 fixed at a position in the drum 2 of the rotating shaft 4.
[0015]
The drum 2 is a cylindrical horizontal type, and the rotating shaft 4 penetrates the shaft core. The drum 2 includes a main body barrel 2a positioned on the treatment liquid supply port 14 side and a vapor barrel 2b positioned on the outlet 15 side. The main body trunk 2a and the vapor trunk 2b are concentrically continuous. The main body body 2a and the vapor body 2b may have the same or different body diameters. In this example, the body diameter of the vapor body 2b is slightly smaller.
[0016]
In the illustrated embodiment, as a heating means, a jacket 3 is provided on the main body barrel 2a, and a heat transfer tube 7 is provided on the vapor barrel 2b. As shown in FIGS. 3 and 4, the heat transfer tube 7 is attached to the outer periphery of the vapor barrel portion 2b while maintaining a certain distance H (see FIG. 4) from the outer peripheral wall surface. The attachment means for the heat transfer tube 7 is not particularly limited. In this embodiment, as shown in FIG. 4, a mounting plate 19 is erected on the outer peripheral wall surface of the vapor barrel portion 2 b, and the heat transfer tube 7 is pressed and fixed to the mounting plate 19 by a support 17. . The support 17 is fixed with screws 18. At this time, the mounting plate 19 is provided with a long hole, and the interval H can be adjusted by adjusting the position of the heat transfer tube 7 by loosening the screw 18 and adjusting the position of the support 17 within the range of the long hole. Good. If the interval H can be adjusted, the heating temperature of the vapor barrel 2b can be adjusted without changing the concentration of the heat medium, which is preferable. A heat medium (for example, steam) is supplied to the heat transfer tube 7 from the inlet 7a and discharged from the outlet 7b.
[0017]
Further, the rotating shaft 4 is rotated by being connected to a motor 10 by rotating a transmission mechanism. The transmission mechanism is not particularly limited and may be a conventionally known one. In this example, a belt 13 is suspended between a pulley 9 fixed to the rotary shaft 4 and a pulley 11 fixed to the drive shaft of the motor 10 as the transmission mechanism. An example of turning is shown.
[0018]
A long plate-like stirring blade 5 is fixed at a position in the drum 2 of the rotating shaft 4, and the stirring blade 5 is rotated by the rotating shaft 4. The long plate-shaped stirring blade 5 is provided with a small gap h between the outer end 5a and the inner peripheral wall surface 12 of the drum 2 (see FIG. 3). When the stirring blade 5 is rotated by the gap h, a thin film of the processing liquid is formed between the outer end 5 a of the stirring blade 5 and the inner peripheral wall surface 12 of the drum 2, and comes into contact with the inner peripheral wall surface 12 of the drum 2. For forming this thin film, a long plate-like stirring blade 5 is preferable.
That is, when the processing liquid is supplied into the drum 2 from the inlet 14 and the rotating shaft 4 is rotated by the motor 10 to rotate the stirring blade 5, the processing liquid becomes a thin film due to the centrifugal force generated by the rotation of the stirring blade 5 and the gap h. The drum 2 moves toward the outlet 15 while being in contact with the inner peripheral wall surface 12. Therefore, the thickness of the thin film of the treatment liquid formed by the rotation of the stirring blade 5 is determined by the centrifugal force and the gap h by the rotation of the stirring blade 5. The rotation speed of the stirring blade 5 and the interval of the gap h are set in an optimum range according to the processing liquid.
[0019]
In the treatment liquid treatment, the treatment liquid is stirred while being in contact with the inner peripheral wall surface 12 of the drum 2 by the rotation of the stirring blade 5 and moved to the outlet 15 side. This movement is sequentially carried to the outlet 15 side by the processing liquid supplied later. In order to ensure the movement of the processing liquid, an inclined blade 6 may be fixed to the stirring blade 5 as shown in FIG. The inclined blades 6 are inclined so as to send the processing liquid to the outlet 15 side by rotation. Therefore, as shown in FIG. 5, when the stirring blade 5 rotates in the direction of arrow A, the processing liquid hits the inclined surface of the inclined blade 6 and moves in the direction of arrow B. It will surely be sent to the outlet 15 side while being processed. Since the processing liquid is sequentially flowed and moved to the outlet 15 side by the supplied processing liquid, the inclined blades 6 are not necessarily required, but the presence of the inclined blade is preferable because the movement of the processing liquid is surely promoted.
[0020]
Thus, according to the concentrating device 1 according to this embodiment, when the processing liquid is supplied from the supply port 14 into the drum 2 and the stirring blade 5 is rotated by the motor 10 via the rotating shaft 4, the stirring blade 5 Due to the gap h between the outer end 5a and the inner peripheral wall surface 12 of the drum 2 and the centrifugal force, the treatment liquid is formed into a thin film and is stirred and moved while in contact with the inner peripheral wall surface 12 of the drum 2. This movement is caused to flow in the processing liquid supplied later, or in the direction of the outlet 13 by the action of the inclined blade 6. At this time, the inner peripheral wall surface 12 of the body body 2a of the drum 2 is heated by a heat medium (for example, steam) supplied to the jacket 3, so that it is formed in a thin film and is inside the body body 2a of the drum 2. The treatment liquid that is stirred and moved while in contact with the peripheral wall 12 is heated and evaporated to adjust the moisture, and is discharged from the outlet 15. Further, since the treatment liquid splashed on the inner peripheral wall surface of the vapor drum portion 2b of the drum 2 is not heated at a high temperature because the heating surface is not directly heated, it is only kept at a suitable temperature, so that it does not stick or solidify. It flows and is discharged from the outlet 15. Moreover, since the vapor | steam trunk | drum 2b is hold | maintained moderately, vapor condensation does not occur and vapor is reliably discharged | emitted from the vapor | steam exit 8. FIG.
[0021]
The above embodiment does not limit the present invention, and the present invention can be variously modified without departing from the gist. For example, it is possible to use only the heat transfer tube as the heating means with the treatment liquid, or to change the main body barrel to the heat transfer tube and the vapor barrel to the jacket.
[0022]
【The invention's effect】
As explained in detail above, the concentrator of the present invention has the following effects.
(1) The treatment liquid in the drum moves while contacting the inner peripheral wall surface of the drum which is heated as a thin film by the rotation of the stirring blades, and is heated and evaporated to adjust the water content. Can be done easily and quickly. At this time, since the heat transfer tube maintaining a constant distance from the outer peripheral wall surface of the drum is used singly or in combination with the jacket, it is possible to perform an optimum heat concentration treatment that does not carbonize or blacken according to the treatment liquid. In particular, if the heating means of the vapor barrel is a heat transfer tube provided with a certain distance from the outer peripheral wall surface, the treatment liquid scattered on the vapor drum inner surface can be reliably discharged without being fixed or solidified. In addition, the vapor body is kept warm, so that vapor does not condense, and the vapor can be reliably discharged from the vapor outlet.
[0023]
(2) There is no sticking / solidification of the processing liquid on the inner surface of the vapor body, and vapor does not condense. Therefore, maintenance (dismantling / cleaning) is required every short period of time as before, but the maintenance period is long. It can be extended (or not required) significantly.
[0024]
(3) Since the interval between the heat transfer tube and the outer peripheral wall surface of the drum can be adjusted, the heating temperature for transferring heat from the heat transfer tube to the outer peripheral wall surface of the drum can be adjusted by adjusting the interval. An optimum heating temperature can be obtained.
[0025]
(2) Since the treatment liquid in the drum flows as a thin film on the heating surface, which is the inner peripheral wall surface of the drum, while being stirred by the stirring blades, the evaporation capacity is increased, and the apparatus can be downsized. The thin film is reliably formed by the distance between the long plate-shaped stirring blade and the drum inner peripheral wall surface.
(3) Since it is stirred as a thin film, the heat transfer ability is less affected by viscosity, and can be efficiently processed even with high viscosity substances and slurries.
[0026]
(4) Since the treatment liquid that flows as a thin film is evaporated and concentrated in a short heat treatment time from the supply port to the outlet, it is possible to treat thermally unstable substances.
(5) Since the thin film flowing along the heating surface (drum inner peripheral wall surface) does not increase in boiling point by the liquid head, it is possible to treat high boiling point and high viscosity substances by vacuum evaporation.
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a concentrating device showing an embodiment of the present invention.
FIG. 2 is a side view of a concentrating device showing an embodiment of the present invention.
FIG. 3 is a sectional view taken along line 1A-A in FIG.
4 is an enlarged cross-sectional view of a B part in FIG. 3. FIG.
FIG. 5 is a partial perspective view for explaining the operation of the inclined blade.
FIG. 6 is a cross-sectional view showing a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Concentrator 2 Drum 2a Drum main body 2b Drum vapor trunk 3 Jacket 4 Rotating shaft 5 Stirring blade 5a Stirring blade outer end 6 Inclined blade 7 Heat transfer tube 12 Inner peripheral wall surface 17 of main body trunk 18 Screw 19 Mounting plate

Claims (4)

There is a small gap between the drum provided with heating means on the outer periphery, a rotary shaft that is rotatably supported through the drum, and the inner peripheral wall surface of the drum at a position in the drum. The processing liquid supplied from the supply port into the drum is rotated by the stirring blade and is in contact with the rotating drum as a thin film along the inner peripheral wall surface of the heated drum. Is a concentrating device that is gradually flowed to, evaporated by heating, adjusted for moisture and discharged from the outlet,
The drum is composed of a main body barrel located on the treatment liquid supply port side and a vapor barrel located on the outlet side,
The heating means is a jacket provided on the outer peripheral wall surface of the drum on the main body side, and a heat transfer tube in which the vapor drum side is disposed on the outer periphery of the drum with a certain distance from the outer peripheral wall surface of the drum. To concentrate. The concentrator according to claim 1 , wherein the heat transfer tube is adjustable in distance from the outer peripheral wall surface of the drum. The concentrating device according to claim 1 or 2 , wherein the stirring blade has a long plate shape. The concentration apparatus according to any one of claims 1 to 3 , wherein the stirring blade is provided with an inclined blade that moves the processing liquid in an outlet direction by rotation.

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