JP7300716B2 - Rotating sprayer and evaporator equipped with same - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rotary liquid dispersion tool and an evaporator equipped with the same, and more particularly, a rotary liquid dispersion tool for spraying and evaporating a volatile component contained in a raw material liquid in a stirring tank to a heat source and the same. It relates to an evaporator provided.

For example, in the food industry, chemical industry and pharmaceutical industry, evaporators called "falling film evaporators" are used to recover or separate solvents, which are volatile components, from liquids containing contaminants and impurities. there is

A conventional falling-film evaporator includes a stirring tank having an inner wall heated by a heat source, and rollers and wipers rotating in contact with the inner wall of the stirring tank. This falling film evaporator heats the raw material liquid flowing down on the inner wall while forming a wet surface from above the stirring vessel, and evaporates the volatile components contained in the raw material liquid on the inner wall while circulating on the inner wall. It is possible to forcibly renew the surface of the raw material liquid existing on the heat transfer surface of the inner wall by a roller or a wiper to increase the evaporation efficiency. However, in such a falling film evaporator, the raw material supplied moves in a single flow by a so-called "one opus", so if the raw material contains a large amount of volatile components, the inner wall Volatile components may not evaporate sufficiently before flowing down, and an improvement in evaporation efficiency has been desired.

On the other hand, in recent years, the raw material liquid is temporarily stored in the stirring tank, and instead of the roller and the wiper, the raw material liquid stored in the stirring tank is scooped up by rotating in the horizontal direction in the stirring tank. After that, an evaporator equipped with a rotating liquid sprinkler that raises the raw material liquid scooped up with the rotation upward through a gutter-shaped flow path and sprays it from the upper end toward the inner wall of the stirring tank has been proposed ( For example, Patent Document 1). In an evaporator equipped with such a rotating liquid dispersion tool, the raw material liquid can be repeatedly sprayed and flowed down on the inner wall of the stirring tank, so that the volatile components in the raw material liquid can be efficiently evaporated. Here, Patent Document 1 discloses that the raw material liquid can be concentrated in stages by arranging such rotating liquid dispersion tools in a multistage manner in the vertical direction, and that a condenser (cooler) is arranged in the stirring tank. It is also described that the volatile components evaporated by the process can be condensed on a condenser and recovered as a liquid.

However, the rotary liquid dispersion tool described in Patent Document 1 may violently shake the liquid surface of the raw material liquid when it rotates in the stirring tank of the evaporator to scoop up the raw material liquid. In particular, when the amount of raw material liquid stored in the stirring tank is small, it may be difficult to properly scoop up the raw material liquid from the rotating liquid dispersion device due to the fluctuation of the liquid surface.

Alternatively, spattering on the inner wall of the agitating tank or fluctuation of the liquid surface may cause unwanted splashes of the raw material liquid in the agitating tank. If the amount of splashing of the raw material liquid generated in the agitation tank increases, the possibility of it adhering to the condenser placed in the agitation tank increases, contaminating the volatile components condensed in the condenser and reducing the purity. It is conceivable that it will lead to a decline.

As described above, the evaporator equipped with the rotating liquid dispersion tool has improved the evaporation efficiency of the volatile components compared to the conventional falling film evaporator. New improvements are desired.

WO2016/143776

An object of the present invention is to solve the above problems, and an object of the present invention is to provide a rotary liquid sprinkler capable of reducing the occurrence of unnecessary splashes of the raw material liquid in the agitating tank, and an evaporator equipped with the same. It is to provide a device.

The present invention is a rotary liquid sprayer arranged in a stirring tank of an evaporator for spraying a raw material liquid stored in the stirring tank to a heat source,
an annular base having an inner surface that expands from the lower end to the upper end;
a plurality of gutter-shaped members extending radially upward from a part of the circumference forming the upper end of the annular base;
a connecting part that connects the plurality of gutter-shaped members to each other and that can be attached to the rotating shaft of the evaporator;
It is a rotating liquid dispersion tool.

In one embodiment, a shield is provided along the inner surface of the annular base for controlling movement of the raw material liquid from the lower end to the upper end of the annular base, and the raw material liquid is It is movable from the lower end to the upper end of the annular base through a plurality of openings provided in the shield.

In a further embodiment, the plurality of gutter-shaped members are provided corresponding to the positions of the plurality of openings of the shielding portion in the annular base.

In one embodiment, each of the plurality of gutter-shaped members has a substantially arc-shaped channel cross-section in the length direction, and the curvature of the channel cross-section increases from the lower end to the upper end of the gutter-shaped member. fluctuate.

In one embodiment, the plurality of gutter-shaped members have bent portions that bend inward in the rotational direction.

The invention is also an evaporator, comprising:
an agitating tank having a raw material liquid supply port, a volatile component outlet and a concentrated liquid outlet and containing the raw material liquid;
a heat source provided inside the stirring tank;
a dispersion unit provided in the agitating vessel and configured to flow down the raw material liquid to the heat source;
a first condenser provided on the outer circumference of the agitation vessel and cooling the inner wall of the agitation vessel;
with
The evaporator, wherein the liquid dispersion unit comprises a rotary shaft and the rotary liquid dispersion tool attached to the rotary shaft.

In one embodiment, the evaporator of the present invention further includes a second condenser inside the stirring vessel, and the second condenser is arranged inside the rotational locus of the dispersion part.

In a further embodiment, the evaporator of the invention comprises a second volatiles outlet at said bottom of said stirred vessel, said second volatiles outlet being arranged below said second condenser.

The present invention is also an evaporation system comprising a raw material tank containing a raw material liquid, and the above-described evaporator for processing the raw material liquid supplied from the raw material tank.

ADVANTAGE OF THE INVENTION According to this invention, a volatile component can be efficiently evaporated from a raw material liquid, without using members, such as a roller and a wiper. Furthermore, during this evaporation, the generation of splashes of the raw material liquid in the agitating vessel is reduced, and the volatile components separated from the raw material liquid and condensed are mixed with the droplets to avoid the possibility of contamination of the volatile components. be able to.

1 is a perspective view of a rotary liquid dispersion tool showing an example of the rotary liquid dispersion tool of the present invention; FIG. FIG. 2 is a cross-sectional view of the rotating liquid dispersion tool shown in FIG. 1 taken along the line AA. FIG. 2 is a cross-sectional view of the rotating liquid dispersion tool shown in FIG. 1 taken along the line BB. FIG. 2 is a cross-sectional view of the rotating liquid dispersion tool shown in FIG. 1 taken along line CC. FIG. 2 is a partial cross-sectional view schematically showing an example of the evaporator of the present invention equipped with the rotating liquid dispersion tool shown in FIG. 1; 1 is a schematic diagram of an evaporation system comprising an evaporator of the present invention; FIG.

The invention will now be described with reference to the accompanying drawings.

(Rotary sprayer)
FIG. 1 is a perspective view of a rotary liquid dispersion tool showing an example of the rotary liquid dispersion tool of the present invention.

A rotary liquid sprinkler 100 of the present invention comprises an annular base 102 , a plurality of gutter-like members 104 and a connecting portion 106 .

The annular base 102 has an annular shape that is substantially circular in the horizontal direction and hollow in the center. FIG. 2 shows a cross-sectional view of the rotating liquid dispersion tool 100 shown in FIG. 1 along the line AA. As shown in FIG. 2, annular base 102 has an inner surface 112 that widens from lower end 108 to upper end 110 . The inner surface 112 preferably has a smooth surface from the lower end 108 to the upper end 110. By rotating the rotating liquid dispersion tool 100 at a predetermined speed or higher in a stirring tank in which the raw material liquid is stored, the raw material liquid is Due to the viscosity of the constituents contained in the liquid and the centrifugal force applied to them, the liquid spreads across the inner surface 112 and, more specifically, is pumped up from the lower end 108 of the inner surface 112 and moves toward the upper end 110 . can do.

In FIG. 2, the inclination angle _θ1 of the inner surface 112 with respect to the vertical direction of the rotary liquid dispersion device 100 is expressed as the inclination angle of the inner surface 112 with respect to the vertical line _VL1 . The inclination angle θ ₁ of the inner surface 112 is not necessarily limited, but is preferably between 1° and 10°. If the inclination angle _θ1 is less than 1°, the inner surface rises too much with respect to the liquid surface (horizontal plane) of the raw material liquid, and the raw material liquid may not move sufficiently from the lower end to the upper end even if it is rotated at high speed. be. If the inclination angle _θ1 exceeds 10°, the rise of the inner surface with respect to the liquid surface (horizontal plane) of the raw material liquid is too small, and the rotating liquid sprayer itself becomes large at least in the horizontal direction. can be difficult to configure.

Additionally, the annular base 102 may be provided with an annular shield 114 on the inner surface 112 . A shield 114 is disposed along the inner surface 112 of the annular base 102 and can control movement of the feedstock liquid from the lower end 108 to the upper end 110 of the annular base 102 . Specifically, the shielding portion 114 includes an annular shielding plate 116 extending horizontally with respect to the inner surface 112 of the annular base 102 and a plurality of openings 118 arranged in the shielding plate 116 at predetermined intervals. (see, eg, FIG. 3). The raw material liquid moving upward from the lower end 108 of the annular base 102 due to the rotation of the rotary liquid dispersion device 100 is once blocked by the shielding plate 116 of the shielding part 114 from moving upwards, and moves inward along the shielding plate 116 . It moves horizontally over the surface 112 . Then, the raw material liquid passes through a plurality of openings 118 provided between the shielding plates 116 and can be moved upwardly of the annular base portion 102 again. As a result, the raw material liquid can move from the lower end 108 to the upper end 110 of the annular base 102 through the plurality of openings 118 provided in the shielding portion 116 of the annular base 102 while its movement is controlled by the shielding portion 116. .

The mounting position of the shielding part 114 on the annular base 102 is not necessarily limited, but when the rotation of the rotating liquid dispersion tool 100 is stopped, the surface of the raw material liquid stored in the stirring tank is shielded by the shielding part 114 as much as possible. It is preferably provided near the upper end 110 of the annular base 102 to prevent it from being positioned above the plate 116 .

Furthermore, a flange-like protrusion 120 may be provided along the outer circumference of the annular base 102 . Due to the rotation of the rotating liquid dispersion tool 100, the raw material liquid stored in the agitating tank causes the inner surface 112 of the annular base 102 to move upward due to the viscosity of the constituents contained in the raw material liquid and the centrifugal force applied to the constituents. , and may also diverge upwardly from the lower end 108 at the outer surface 122 of the annular base 102 . In order to prevent such movement of the raw material liquid on the outer surface 122 of the annular base 102, the flange-like protrusion 120 serves as a shielding wall. That is, the flange-shaped protrusion 120 prevents the raw material liquid from moving upward along the outer surface 122 from the lower end 108 of the annular base 102 due to the rotation of the rotary liquid sprinkling device 100 . It is possible to prevent the raw material liquid from moving to the This allows the raw material liquid to be pumped up only from the inner surface 112 of the annular base 102 from the lower end 108 of the annular base 102 and move.

The mounting position of the flange-shaped protruding portion 120 on the annular base portion 102 is not necessarily limited. provided at a position away from the lower end 108 of the annular base 102 (for example, the outer circumference of the annular base 102 and near the upper end 110 of the annular base 102) in order to prevent it from being positioned above the protrusion 120 of the annular base 102. preferably.

The size of the annular base 102 is not necessarily limited. It can be designed to any size according to the capacity and inner diameter of the stirring tank of the evaporator to be installed.

Annular base 102 is constructed from materials such as metals such as iron, stainless steel, Hastelloy, titanium, and combinations thereof. The annular base 102 may be provided with a coating known in the art, such as Teflon (registered trademark), glass lining, or rubber lining, in order to enhance chemical resistance.

As shown in FIG. 2, a plurality of gutter-shaped members 104 are provided so as to extend upward from a portion of the circumference forming the upper end 110 of the annular base 102 . The number of gutter-shaped members 104 provided on the annular base 102 is not necessarily limited, but preferably two to six gutter-shaped members 104 are provided. The plurality of gutter-shaped members 104 are also preferably provided at predetermined intervals so as to be substantially equiangular about the rotational axis of the annular base 102 .

The gutter-shaped member 104 collects the raw material liquid that has moved to the upper end 110 of the annular base 102 due to the rotation of the rotary liquid sprinkler 100, and this rotation causes the raw material liquid to flow through the channel 126 provided inside the gutter-shaped member 104. can be moved from the lower end 128 to the upper end 130 of the .

The channel 126 of the trough member 104 may have, for example, a substantially arcuate or semi-cylindrical cross-section as shown in FIG. Alternatively, the channel 126 of the gutter-shaped member 104 may have a channel cross-section other than half-cylindrical, such as a half-square tube, a V-shape, or a half-pipe-like channel cross-section, or as shown in FIG. The lower end 128 and the upper end 130 have such a harp pipe channel cross section, and the intermediate portion between them is processed into a tubular shape (for example, a cylindrical shape, an elliptical shape, or a rectangular shape). Alternatively, the whole may be processed into a cylindrical shape (for example, a cylindrical shape, an elliptical cylindrical shape, or a rectangular cylindrical shape).

In the present invention, when the gutter-shaped member 104 has a substantially arc-shaped channel cross-section as shown in FIG. It is designed to widen from lower end 128 to upper end 130 . For example, at the lower end 128 of the trough member 104 , it is desired to collect more and more efficiently of the raw material liquid that rises from the lower portion 108 of the annular base 102 along the inner surface 112 . For this reason, it is preferable that the channel cross section at the lower end 128 of the gutter-shaped member 104 has a curvature that matches a portion of the circumference (circular arc) forming the upper end 110 of the annular base 102 . On the other hand, it is desirable to prevent the raw material liquid collected at the lower end 128 of the gutter-shaped member 104 from spilling out of the flow path 126 of the gutter-shaped member 104 as it moves to the upper end 130 . For this reason, the curvature of the channel cross section is gradually increased, for example, from the lower end 128 to the upper end 130 of the gutter-shaped member 104 so that the raw material liquid moving in the channel 126 does not spread laterally of the gutter-shaped member 104 and 130 can be efficiently moved. In one embodiment of the present invention, as shown in FIG. 4, the curvature of the substantially arcuate channel cross-section of the channel 126 at a location midway or above the trough member 104 is truncated as shown in FIG. It is designed to be greater than the curvature of channel 126 at a location near the bottom of shaped member 104 .

Furthermore, in the rotary liquid sprinkler 100 of the present invention, when the shielding portion 114 is provided on the annular base 102, the gutter-shaped member 104 is positioned on the annular base 102 where the opening 118 of the shielding portion 114 is provided. is preferably provided corresponding to . In this case, the raw material liquid rising from the annular base 102 by the shielding part 114 is discharged toward the upper end 110 of the annular base 102 only through the opening 118 . By arranging the gutter-shaped member 104 at such a position, the raw material liquid discharged from the opening 118 can be efficiently collected in the gutter-shaped member 104 .

Referring to FIG. 2 again, in the rotary liquid sprinkler 100 of the present invention, the plurality of gutter-shaped members 104 are bent inward in the rotational direction, for example, at a bent portion 132 at or near the middle in the height direction. is preferred. By bending at the bending portion 132 , the rotary liquid sprinkler 100 of the present invention has a structure in which the upper end 130 of the gutter-shaped member 104 is closer to the shaft fixing portion 134 side. As a result, the overall diameter _Lw of the rotary liquid dispersion tool 100 can be made shorter, and the rotary liquid dispersion tool 100 of the present invention can have a compact structure in the diametrical direction. It becomes possible. Although one gutter-shaped member 104 is provided with one bent portion 132 in FIG. 2, the present invention is not limited to this. Two or more bends may be provided for the trough member 104 .

The bending angle _θ2 at the bent portion 132 is expressed as the inclination angle of the upper gutter-shaped member 104a from the bent portion 132 to the upper end 130 with respect to the vertical line _VL2 , as shown in FIG. The bending angle θ ₂ at the bent portion 132 is not necessarily limited, but is preferably 1° to 10°. When the bending angle θ ₂ is less than 1°, the overall diameter _Lw of the rotating liquid dispersion tool 100 does not become too small despite the provision of the bent portion 132, and the agitating vessel to be accommodated can be made compact. can be difficult. When the bending angle _θ2 exceeds 10°, the inclination from the bent portion 132 to the upper end 130 of the gutter-shaped member 104 becomes large, and even if the rotating liquid dispersion tool is rotated at high speed, the raw material liquid can efficiently reach the upper end 130. It may not move.

The gutter-shaped member 104 is also provided on one side of the edges 135 and 136 of the flow path 126 (of the two edges 135 and 136 of the flow path 126, on the side of the edge 135 positioned rearward in the direction of rotation). For example, a flap-like member 138 may be provided that extends from near the lower end 128 to a portion of the inner surface 112 of the annular base 102 . By rotating the rotary liquid sprinkler 100, the raw material liquid moves from the lower end 108 to the upper end 110 of the annular base 102 and is collected at the lower end 128 of the gutter-shaped member 104. There are cases where there is concern about spillage from the edge 134 side near the lower end 128 of the . In such a case, by providing the flap-shaped member 138, the flap-shaped member 138 shields the movement of the raw material liquid in the rotational direction at the edge 134 side of the gutter-shaped member 104, and the raw material liquid spills out. can be avoided or reduced.

Incidentally, as shown in FIG. 2, if the lower end of the flap-shaped member 138 extends to a part of the inner surface 112 of the annular base 102, the lower end of the flap-shaped member 138 is above the liquid surface of the raw material liquid stored in the stirring tank. It is conceivable that the raw material liquid itself, which is positioned below and is stored by the rotation of the rotating liquid sprinkler, is agitated, and the liquid level fluctuates greatly up and down, or unnecessary droplets are generated. In such a case, the lower end of the flap-shaped member 138 is placed above the liquid surface of the raw material liquid in the assumed stirring vessel (for example, the lower end 108 of the gutter-shaped member 104 or the shielding portion 114 where the annular base 102 is arranged). may be positioned at or above the same height as the liquid level to avoid such fluctuations in the liquid level and the generation of splashes.

The gutter-shaped member 104 is made of, for example, metals such as iron, stainless steel, Hastelloy, titanium, and combinations thereof. The gutter-shaped member 104 may be provided with a coating known in the art, such as Teflon (registered trademark), glass lining, or rubber lining, in order to enhance chemical resistance.

Referring to FIG. 1 again, the connecting portion 106 includes a shaft fixing portion 134 that accommodates and fixes a rotating shaft (described later) extending from the upper portion of the stirring vessel of the evaporator, and a plurality of gutter-like members 104 that are axially fixed one by one. and a connecting bar 140 that connects to the portion 134 . In FIG. 1, the connecting bar 140 is fixed at substantially the same height as the upper end 130 of the gutter-shaped member 104, and is fixed to the gutter-shaped member 104 in a curved state along the outer shape of the gutter-shaped member 104. However, the invention is not so limited. For example, the tie bar may be secured at other locations (eg, the middle portion) of the trough member 104, or by multiple connections near the upper end 130 of the trough member 104, as shown in FIG. 1, and elsewhere. The positions may be fixed by connecting bars that are different from each other.

The connecting portion 106 is made of, for example, metal such as iron, stainless steel, Hastelloy, titanium, or a combination thereof. The gutter-shaped member 104 may be provided with a coating known in the art, such as Teflon (registered trademark), glass lining, or rubber lining, in order to enhance chemical resistance.

The rotary liquid sprayer 100 of the present invention is placed in a stirring tank of an evaporator and used to spray the raw material liquid stored in the stirring tank to a heat source. By spraying the raw material liquid from the rotating liquid dispersion tool 100 to the heat source, the volatile components contained in the raw material liquid can be evaporated and separated from the raw material liquid.

The rotating liquid dispersion unit 100 of the present invention can gently move the raw material liquid toward the gutter-like member 104 without violently stirring the raw material liquid stored in the stirring tank by the rotation of the annular base 102 . As a result, it is possible to avoid causing unnecessary splashes in the surroundings and/or greatly fluctuating the liquid level of the stored raw material liquid up and down. For example, when the amount of raw material liquid stored in the agitation tank is small and the addition from the liquid surface to the agitation tank is relatively shallow, the rotary liquid dispersion unit 100 of the present invention can be used inside the agitation tank and/or A condenser for condensing the evaporated volatile components is installed on the outside, and it is useful when it is desired to avoid a drop in the purity of the condensed volatile components due to the contact of the droplets of the raw material liquid with the condenser. be.

(Evaporator)
FIG. 5 is a partial cross-sectional view schematically showing an example of an evaporator 200 of the present invention equipped with the rotating liquid dispersion tool 100 shown in FIG.

The evaporator 200 of the present invention comprises a stirred vessel 202 , a heat source 204 , a dispersion section 206 and a first condenser 208 .

The stirring tank 202 is a sealable tank that can contain and stir raw material liquids such as aqueous solutions and slurries.

The size (capacity) of the stirring tank 202 is not necessarily limited because it can be appropriately set depending on the use of the evaporator 200 (for example, the type of raw material liquid to be supplied), the processing amount of the raw material liquid, and the like. .1 liter to 100,000 liters. The material constituting the stirring tank 202 is not particularly limited, but for example, iron, stainless steel, etc. are used because they are stable against various raw material liquids, have excellent thermal conductivity, and/or are easy to obtain and process. It preferably consists of a metal such as steel, titanium, Hastelloy or copper. The inner wall 212 of the stirring vessel 202 may be provided with a coating known in the art, such as Teflon (registered trademark), glass lining, or rubber lining, in order to enhance chemical resistance.

Agitated vessel 202 also includes a feedstock supply port 214 , a volatile component outlet 216 and a concentrate outlet 218 .

The raw material liquid supply port 214 is provided, for example, above the stirring vessel 202 (for example, the lid portion 203 of the stirring vessel 202 provided above the mounting position of the rotating liquid dispersion tool 100 in the stirring vessel 202). The number of raw material liquid supply ports 214 provided in the stirring tank 202 is not limited to one. For example, a plurality of raw material liquid supply ports may be provided above the stirring vessel 202 .

In addition, above the rotating shaft 228 in the stirring tank 202 (for example, in the vicinity of the lid portion 203 of the stirring tank 202 provided above the mounting position of the rotating liquid dispersion tool 100 in the stirring tank 202), the rotating shaft A disk 225 attached directly to 228 may be provided. Furthermore, a cylindrical auxiliary wall 227 may be provided in the stirring vessel 202 corresponding to the height at which the disk 225 is attached. The raw material liquid introduced from the raw material liquid supply port 214 is once placed on the disk 225 in the stirring tank 202, and as the rotating shaft 228 rotates, the raw material liquid on the disk 225 spreads in the radial direction and spreads from the edge of the disk 225. be diffused. At that time, the raw material liquid diffused from the disk 225 collides with the inner surface of the auxiliary wall 227 and flows downward. The raw material liquid that has flowed down can be dispersed from the lower end of the auxiliary wall 227 toward the bottom of the stirring tank 202 (for example, the heat source 204). As a result, the raw material liquid discharged from the disk 225 does not scatter directly toward the inner wall 212 of the stirring vessel 202, for example, so that the raw material liquid can be prevented from accidentally moving to the volatile component storage section 220.

In FIG. 5, the volatile component outlet 216 is provided in communication with the volatile component storage compartment 220 within the stirring tank 202 . The volatile component containing compartment 220 extends upwardly from the bottom 210 of the agitated vessel 202 (more specifically, a portion of the bottom 210 of the agitated vessel 202), an inner wall 212, and within the agitated vessel 202 and from the agitated vessel. 202 is surrounded by partition walls 222 provided at regular intervals along the inner periphery of the 202, and the upper side is open. The volatile component storage section 220 can temporarily store volatile components (preferably liquid volatile components) contained in the raw material liquid condensed on the inner wall 212 and flowed down. Furthermore, volatile components within volatile component storage compartment 220 may be discharged to the outside via volatile component outlet 216 as condensate.

In FIG. 5, the concentrate outlet 218 is provided in communication with, for example, a portion of the bottom 210 within the stirring vessel 202 . Here, the term "raw material liquid" used in this specification means the (untreated) raw material liquid introduced from the raw material liquid supply port 214; and the mixture thereof; Furthermore, after the volatile components evaporate, the raw material liquid can finally be discharged to the outside as a concentrated liquid through the concentrated liquid outlet 218 . Concentrated liquid outlet 218 can control discharge of the concentrated liquid by opening and closing a valve (not shown) as necessary. For example, when the discharge of the concentrated liquid is stopped, the raw material liquid flows into the bottom portion 210 of the stirring vessel 202, more specifically, the bottom portion 210 of the stirring vessel 202, the partition wall 222, and the annular base of the rotary dispersion tool 100. It is temporarily stored in a raw material liquid storage section 225 formed between a second partition wall 223 extending upward from a bottom portion 210 on the inside of 102 .

The lid portion 203 of the stirring tank 202 may have, for example, a structure that can be opened and closed, such as a maintenance hole. Furthermore, a decompression port (not shown) may be provided in the upper part of the stirring tank 202 for making the inside of the stirring tank 202 atmospheric pressure or reducing the pressure.

In the evaporator 200 of the present invention, the heat source 204 is arranged, for example, inside the stirring tank 202 so as to be substantially parallel to the inner wall 212 . In FIG. 5, the heat source 204 is made of, for example, a hollow material, and a heat medium such as steam or heat medium oil is introduced from the outside of the stirring tank 202 through the heat medium inlet 224, and the outer surface of the heat source 204 is heated. Volatile components can be evaporated from the raw material liquid in contact with (heating surface or heat transfer surface). When the raw material liquid comes into contact with the heat source 204 , the volatile components of the raw material liquid vaporize and diffuse into the stirring vessel 202 as gas. After passing through the heat source 204 , the heat medium is discharged to the outside of the stirring tank 202 through the heat medium discharge port 226 .

In the embodiment shown in FIG. 5, the heat-applying surface (heat-transfer surface) of the heat source 204 appears on both surfaces (that is, both surfaces on the inner wall 212 side and the central axis side of the stirring vessel 202). As a result, the contact area with the volatile component increases, and the volatile component can be evaporated from the raw material liquid more efficiently. In addition, the heat source 204 provided inside the stirring tank 202 has the advantage that heat loss is less than when provided outside, and heat insulation is easy or unnecessary.

In the evaporator 200 of the present invention, the liquid dispersion part 206 plays a role of spraying the raw material liquid stored in the bottom part 210 of the stirring tank 202 to the heat source 204 and causing it to flow down. The liquid dispersion unit 206 is composed of a rotary shaft 228 and the rotating liquid dispersion tool 100 attached to the rotary shaft 228 . The liquid dispersion part 206 spreads the raw material liquid stored in the bottom part 210 (raw material liquid storage section 225) of the stirring tank 202 through the gutter-shaped member in the rotary liquid dispersion tool 100 by rotation of a motor 230 connected to a rotating shaft 228. It can be caused to flow from the bottom to the top of the stirring vessel 202 through the flow path 126 provided along the length direction of the vessel 104 . As a result, the raw material liquid stored in the bottom portion 210 (raw material liquid storage section 225 ) of the stirring vessel 202 can be discharged upward from the heat source 204 from the upper end 130 of the gutter-shaped member 104 . Then, the raw material liquid that has collided with the heat source 204 falls on the surface of the heat source 204 as it is, and the raw material liquid can be sprayed. Furthermore, while the sprayed raw material liquid flows downward from above the heat source 204, evaporation of volatile components contained therein is accelerated. At the same time, the residue that did not evaporate while flowing down the heat source 204 descends the heat source 204 as a concentrated liquid, and guides 232 provided at the bottom of the heat source 204 (here, the guide 232 is inside the stirring tank 202 202 ) and stored in the bottom 210 (raw material storage section 225 ) of the stirring vessel 202 again.

The rotating shaft 228 is a shaft made of rigid metal such as iron, stainless steel, Hastelloy, or titanium, and has, for example, a cylindrical or columnar shape. The rotating shaft 228 is generally arranged vertically within the agitation vessel 202 . The thickness of the rotating shaft 228 is not necessarily limited, but is, for example, 8 mm to 200 mm. The length of the rotating shaft 228 varies depending on the size of the stirring tank 202 to be used, etc., and an appropriate length can be selected by those skilled in the art. The rotary shaft 202 may be provided with a coating known in the art, such as Teflon (registered trademark), glass lining, or rubber lining, in order to enhance chemical resistance.

In FIG. 5, the lower end of the rotating shaft 228 is not in contact with the bottom 210 of the stirring vessel 202, and is arranged at a certain distance from the bottom 210 of the stirring vessel 202, for example.

In the evaporator 200 of the present invention, the number of revolutions of the rotating shaft 228 (that is, the number of revolutions of the liquid dispersion section 206) suitable for pumping up the raw material liquid in the stirring tank 202 depends on the components of the raw material liquid, its viscosity, The speed varies depending on the size of the tank 202, the amount of raw material liquid stored in the bottom 210 (raw material liquid storage section 225) of the stirring tank 202, and the like, and is not necessarily limited, but is, for example, 30 rpm to 500 rpm.

In the evaporator 200 of the present invention, the first condenser 208 is provided on the outer periphery of the stirring vessel 202, preferably so as to cover the outer periphery of the stirring vessel 202 in continuous close contact.

A cooling medium such as cooling water is injected into the first condenser 208 through an inlet 240 , flows through the first condenser 208 , and is discharged to the outside through an outlet 242 . As a result, the temperature of the cooling medium flowing inside the first condenser 208 is transmitted to the inner wall 212 of the stirring vessel 202, and the inner wall 212 is kept at a low temperature by the cooling medium. On the other hand, the volatile components of the raw material liquid vaporized by evaporation at the heat source 204 are cooled on the inner wall 212, condensed, and flow down on the inner wall 212 as droplets. After that, the volatile components of the raw material liquid flowing down the inner wall 212 are stored in the volatile component storage compartment 220 and discharged to the outside through the volatile component outlet 216 as condensed liquid.

The evaporator 200 of the present invention may also be provided with a second condenser 244 inside the stirred vessel 202 .

In FIG. 5 , the second condenser 244 extends from the inside of the rotary mirror that the dispersion part 206 rotates (that is, from the bottom 210 of the agitation vessel 202 to the inside of the annular base 102 of the rotary dispersion tool 100 and the agitation vessel 202 ). inside the second partition 223 provided at the bottom 210 of the agitation vessel 202), and from the second injection port 246 provided outside the stirring vessel 202, a cooling medium similar to or different from the first condenser 205 (i.e. , the cooling medium introduced into the first condenser 208 and the cooling medium introduced into the second condenser 244 may be of the same or different types, and their set temperatures may also be the same or different). be introduced. The second condenser 244 can be in direct contact with the volatile components of the raw material liquid evaporated by the heat source 204 . As the vaporized volatile components contact the second condenser 244 , they are cooled, condensed, and run down in droplets over the second condenser 244 . After that, the liquid volatile components that have flowed down are temporarily stored in the second volatile component storage compartment 248 provided below the bottom 210 of the stirring tank 202 . In the second component storage compartment 248, the pressure is reduced through the pressure reduction port 249 (VCM), and the liquid volatile components that have flowed down are discharged to the outside through the second volatile component outlet 250 as condensate. Meanwhile, the cooling medium that has passed through the second condenser 244 is discharged to the outside of the stirring tank 202 through the second outlet 251 .

According to the evaporator 200 of the present invention, the volatile components are condensed on the inner wall 212 of the stirring tank 202, and the inner wall is not heated for evaporating the volatile components as in the conventional case. Therefore, when stopping the operation of the evaporator, it is possible to stop the operation in a relatively short time without worrying about the raw material liquid sticking to the inner wall 212 of the stirring tank 202 . The evaporator of the present invention is also easier to stop the device itself than conventional evaporators that pass through the inner wall of the stirring tank in a single flow by "one pass". The use of feedstock for cooling can also be reduced.

(evaporation system)
FIG. 6 is a schematic diagram of an evaporation system including the evaporation device 200 shown in FIG.

An evaporation system 300 of the present invention includes a raw material tank 310 containing a raw material liquid, and an evaporator 200 of the present invention. Furthermore, the evaporation system 300 shown in FIG. 6 also includes a vacuum pump 320 in addition to these.

The raw material liquid passes from the raw material tank 310 through the pipe 332 by driving the pump 320 , is once preheated by a preheater (not shown) as necessary, and is fed to the evaporator 200 . In the embodiment shown in FIG. 6, a heat source (not shown) within distillation apparatus 200 is heated by supplying steam (STM) through heat medium inlet 224 . Volatile components evaporated within evaporator device 200 are condensed by first and second condensers (not shown) within the device 200 as described above. After that, the volatile components condensed in the first condenser (more specifically, condensed on the inner wall through the first condenser) are discharged to the outside from the pipe 334 via the volatile component outlet (216 in FIG. 5). , the volatile components condensed in the second condenser are discharged to the outside from pipe 336 via a second volatile component outlet (250 in FIG. 5).

Thus, the evaporation system 300 of the present invention shown in FIG. 6 does not require a separate condenser in the system configuration, and can be configured in a more space-saving manner.

The evaporator of the present invention can be used, for example, to purify and concentrate liquids containing impurities such as methyl esters, lactic acid, fish oil, fats and oils, glycerin; water, ethanol, methyl ethyl ketone contained in chemical products such as inks, paints and chemicals; (MEK), N-methylpyrrolidone (NMP), hexane, toluene, acetone, ethylene glycol, etc.; removal of volatile impurities from monomers and polymers, etc. used in the paint and resin manufacturing fields;

REFERENCE SIGNS LIST 100 rotary sprayer 102 annular base 104 trough member 106 connection 108 lower end of annular base 110 upper end of annular base 112 inner surface 114 shield 118 opening 122 outer surface 126 channel 128 lower end of trough member 130 of trough member Upper end 132 bent portion 134 shaft fixing portion 138 flap-shaped member 140 connecting bar 200 evaporator 202 stirring tank 204 heat source 206 dispersion portion 206 first condenser 210 bottom portion 212 inner wall 214 raw material liquid supply port 216 volatile component outlet 218 concentrated liquid outlet 222 Partition wall 223 Second partition wall 225 Raw material liquid storage compartment 228 Rotating shaft 244 Second condenser 300 Evaporation system 310 Raw material tank 320 Vacuum pump 320

Claims (8)

A rotary liquid sprayer arranged in a stirring tank of an evaporator for spraying a raw material liquid stored in the stirring tank to a heat source,
an annular base having an inner surface that expands from the lower end to the upper end;
a plurality of gutter-shaped members extending radially upward from a part of the circumference forming the upper end of the annular base;
a connecting part that connects the plurality of gutter-shaped members to each other and that can be attached to the rotating shaft of the evaporator;
A rotating liquid dispenser. A shield is provided along the inner surface of the annular base for controlling movement of the raw material liquid from the lower end to the upper end of the annular base, and the raw material liquid is provided on the shield. 2. The rotary liquid dispenser of claim 1, movable from the lower end of the annular base to the upper end through a plurality of openings. 3. The rotary liquid sprinkler according to claim 2, wherein said plurality of gutter-like members are provided corresponding to positions of said plurality of openings of said shielding portion in said annular base. 2. The plurality of trough-like members have a substantially arcuate channel cross-section in the length direction, and the curvature of the channel cross-section varies so as to increase from the lower end to the upper end of the trough-like members. 4. The rotating liquid dispersion tool according to any one of 3 to 3. an evaporator,
an agitating tank having a raw material liquid supply port, a volatile component outlet and a concentrated liquid outlet and containing the raw material liquid;
a heat source provided inside the stirring tank;
a dispersion unit provided in the agitating vessel and configured to flow down the raw material liquid to the heat source;
a first condenser provided on the outer circumference of the agitation vessel and cooling the inner wall of the agitation vessel;
with
5. An evaporator, wherein the liquid dispersion unit comprises a rotary shaft and the rotary liquid dispersion tool according to any one of claims 1 to 4 attached to the rotary shaft. 6. The evaporator according to claim 5 , further comprising a second condenser inside the agitating tank, the second condenser being arranged inside the rotational trajectory of the liquid dispersion part. 7. Evaporator according to claim 6 , comprising a second volatiles outlet at the bottom of said stirred vessel, said second volatiles outlet being located below said second condenser. a raw material tank containing the raw material liquid;
8. The evaporator according to any one of claims 5 to 7 , which processes the raw material liquid supplied from the raw material tank;
an evaporation system.

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