Evaporator and evaporation system using the same

Abstract

To provide an evaporator which has a multistage form, and can achieve excellent evaporation efficiency to raw material liquid, and an evaporation system using the same.SOLUTION: An evaporator includes: a first stirring tank which includes a first storage part for storing first raw material liquid, and is sealable and heatable; a second stirring tank which includes a second storage part for storing second raw material liquid, and is sealable and heatable; a single rotation shaft which is arranged in a direction vertical to each of the first stirring tank and the second stirring tank; a first liquid spraying part which is mounted on the rotation shaft in the first stirring tank, and sprays the first raw material liquid into the first stirring tank; and a second liquid spraying part which is mounted on the rotation shaft in the second stirring tank, and sprays the second raw material liquid into the second spraying tank. The first stirring tank is arranged above the second stirring tank in an overlapped manner, the first storage part in the first stirring tank and the second stirring tank are communicated with each other through a raw material liquid circulation pipe having a control valve, and inner pressures of the first stirring tank and the second stirring tank are different each other.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an evaporation device and an evaporation system using the same, and more particularly to an evaporation device capable of efficiently recovering and concentrating a solvent from a liquid, and an evaporation system using the same. [Background technology]

[0002] In the fields of food industry and chemical industry, an evaporator called a "falling film evaporator" is used for recovering or concentrating a solvent from a liquid containing contaminants or impurities.

[0003] In this falling thin film evaporator, when the raw material liquid is sprayed from above into the stirring vessel toward the inner wall of the stirring vessel and flows down, a roller or wiper moves along the inner wall of the stirring vessel to form a thin film of the raw material liquid. After that, the volatile components in the thin film are evaporated by the heat previously applied to the inner wall and discharged outside the stirring vessel.

[0004] However, it has been pointed out that in such falling film evaporators, the raw material liquid flows through the inner wall (heat transfer surface) of the mixing vessel in a single pass, which results in insufficient evaporation efficiency. It has also been pointed out that the rollers and wipers used in this equipment are prone to wear.

[0005] In response to this, an evaporation device has been provided that is equipped with a trough-shaped member that can tilt and rotate inside the stirring tank instead of rollers or wipers (Patent Document 1). In this evaporation device, the trough-shaped member and the inner wall of the stirring tank are kept out of contact with each other, so there is no particular need to replace the trough-shaped member due to wear.

[0006] Furthermore, in recent years, multi-stage evaporators have been proposed in which the gutter-shaped members are arranged in multiple stages in the height direction (Patent Documents 2 to 4). In a multi-stage evaporator, multiple inclined and rotatable gutter-shaped members are arranged vertically side by side in one communicating stirring tank, and the lower ends of the gutter-shaped members are arranged in storage sections that are provided separately in the vertical direction in the stirring tank and that store the raw material liquid. This makes it possible to more efficiently evaporate the volatile components contained in the raw material liquid by using multiple stages and multiple gutter-shaped members.

[0007] However, even in such a multi-stage evaporator, further improvement in the evaporation efficiency is desired. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] International Publication No. 2003 / 022389 [Patent Document 2] International Publication No. 2016 / 143776 [Patent Document 3] International Publication No. 2017 / 043368 [Patent Document 4] JP 2019-217450 A Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention is directed to solving the above problems, and has an object to provide an evaporation device having a multi-stage configuration and capable of achieving excellent evaporation efficiency for the raw material liquid, and an evaporation system using the same. [Means for solving the problem]

[0010] The present invention provides an evaporation device, comprising: a first stirring tank that is sealable and heatable and that includes a first storage portion that contains a first raw material liquid; a second stirring tank that is sealable and heatable and that includes a second storage portion that contains a second raw material liquid; a rotating shaft disposed vertically relative to each of the first stirring tank and the second stirring tank; a first liquid dispersion unit that is attached to the rotating shaft in the first agitation tank and disperses the first raw material liquid into the first agitation tank; a second liquid dispersion unit that is attached to the rotating shaft in the second agitation tank and disperses the second raw material liquid into the second agitation tank; Equipped with The first stirred tank is disposed above the second stirred tank in a stacked manner; the first storage section in the first stirring tank and the second stirring tank are in communication with each other via a raw material liquid flow pipe having a control valve; The internal pressure of the first agitation tank is different from that of the second agitation tank, The first liquid-spraying unit includes at least one first liquid-spraying device having a first flow path that absorbs the first raw material liquid stored in the first storage unit from a first lower end and discharges the first raw material liquid from a first upper end as the rotating shaft rotates; The evaporation apparatus is provided with at least one second liquid-spraying device, the second liquid-spraying section having a second flow path that absorbs the second raw material liquid stored in the second storage section from a second lower end and discharges it from a second upper end as the rotating shaft rotates.

[0011] In one embodiment, the first stirred tank is heatable by a first temperature-regulating jacket provided on the outer periphery, and the second stirred tank is heatable by a second temperature-regulating jacket provided on the outer periphery.

[0012] In one embodiment, the first stirred tank is provided with a volatile component outlet, and the volatile component outlet is connected to a second temperature control jacket provided in the second stirred tank via a first volatile component flow pipe.

[0013] In a further embodiment, the internal pressure of the second stirred tank is set lower than the internal pressure of the first stirred tank.

[0014] In one embodiment, the second stirred tank is provided with a volatile component outlet, and the volatile component outlet is connected to a first temperature control jacket provided in the first stirred tank via a second volatile component flow pipe.

[0015] In a further embodiment, the internal pressure of the first stirred tank is set lower than the internal pressure of the second stirred tank.

[0016] In yet another embodiment, a liquid delivery pump is disposed in the raw material liquid flow pipe.

[0017] The present invention also provides a method for producing a liquid feedstock, comprising: the evaporator for treating the raw material liquid supplied from the raw material tank; a condenser for condensing the volatile components discharged from a volatile component outlet of the evaporator; The evaporation system includes: Effect of the Invention

[0018] According to the present invention, the evaporation efficiency of the raw material liquid can be increased by efficiently using the energy required for operation. In addition, since the evaporation apparatus of the present invention has separate stirring tanks, maintenance or cleaning of the insides of the stirring tanks can be efficiently performed individually. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is a cross-sectional view illustrating an example of an evaporation device of the present invention. [Diagram 2] 2 is a perspective view of a cylindrical first sprinkling device constituting a first sprinkling section of the evaporation apparatus shown in FIG. 1. FIG. [Diagram 3] 2 is a perspective view of a trough-shaped first sprinkling device that can constitute the first sprinkling section of the evaporation apparatus shown in FIG. 1. FIG. [Figure 4] FIG. 4 is a cross-sectional view illustrating a schematic diagram of another example of an evaporation device of the present invention. [Diagram 5] FIG. 2 is a schematic diagram showing an evaporation system of the present invention including the evaporation device shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] The present invention will now be described with reference to the accompanying drawings, in which like reference numbers are used throughout the drawings to designate similar features as shown in the other drawings.

[0021] 1. Evaporation device FIG. 1 is a cross-sectional view that illustrates an example of an evaporation device of the present invention.

[0022] 1, the evaporation apparatus 100 of the present invention includes a first stirred tank 110, a second stirred tank 160, a rotating shaft 140, a first liquid-spraying section 130, and a second liquid-spraying section 170. In the evaporation apparatus 100 of the present invention, the first stirred tank 110 is disposed above the second stirred tank 160 in a stacked manner.

[0023] (1) First and second mixing vessels The first stirring tank 110 and the second stirring tank 160 are sealable tanks into which the first raw material liquid 108a and the second raw material liquid 108b are respectively supplied. The first stirring tank 110 and the second stirring tank 160 can store and stir various liquids such as aqueous solutions and slurries as the first raw material liquid 108a and the second raw material liquid 108b, respectively.

[0024] The first stirred tank 110 has a volatile component outlet 106 at the top, and volatile components evaporated from the first raw material liquid 108a in the first stirred tank 110 can be discharged to the outside of the first stirred tank 110 through this volatile component outlet 106. Furthermore, the first stirred tank 110 may be provided with a first raw material liquid supply port 117, for example, near the first reservoir 116 at the bottom. The first raw material liquid 108a can be supplied into the first stirred tank 110 continuously or intermittently through this first raw material liquid supply port 117.

[0025] A first temperature control jacket 145 is provided around the first stirred tank 110 to control the temperature in the first stirred tank 110, specifically, the temperature of the first inner wall 111 that constitutes the inside of the first stirred tank 110. The first temperature control jacket 145 is arranged to cover the entire outer side surface of the first stirred tank 110 continuously or intermittently, for example, so that the entire surface of the first inner wall 111 can be heated. The first temperature control jacket 145 is not particularly limited in type and shape as long as it can heat the raw material liquid flowing down the surface of the first inner wall 111 to a temperature at which the volatile components in the raw material liquid can be volatilized. For such a first temperature control jacket 145, a heating means known to those skilled in the art (for example, a heating medium capable of introducing steam or a heat medium into the inside, a cable heater, and a combination thereof) can be used. In the embodiment shown in FIG. 1, the first temperature control jacket 145 is provided with a heating medium inlet pipe 143 for introducing a heating medium such as steam into the inside, and a heating medium outlet pipe 144 for discharging the heating medium to the outside of the first temperature control jacket 145.

[0026] The first stirred tank 110 has a first reservoir 116 at its bottom for storing the first raw material liquid 108a.

[0027] In the present invention, the first reservoir 116 of the first stirred tank 110 communicates with a second stirred tank 160, which will be described later, via a raw material liquid flow pipe 154 equipped with a control valve 152. In Fig. 1, a level indicator 156 is connected to the first reservoir 116, and when the first raw material liquid 108a contained in the first reservoir 116 reaches a predetermined liquid amount (i.e., a liquid level of a predetermined height), the control valve 152 is opened by a signal from the level indicator 156, and the first raw material liquid 108a contained in the first reservoir 116 of the first stirred tank 110 flows into the second stirred tank 160 via the raw material liquid flow pipe 154. Then, when the first raw material liquid 108a contained in the first storage section 116 falls below the above-mentioned or separately set liquid amount (i.e., the above-mentioned or separately set liquid level), the control valve 152 is closed by a signal from the level indicator 156, and the flow of the first raw material liquid 108a contained in the first storage section 116 of the first stirring tank 110 through the raw material liquid flow pipe 154 to the second stirring tank 160 is stopped.

[0028] The second stirred tank 160 has a bottom 164 provided with a raw material liquid discharge pipe 162 whose flow can be controlled by an openable and closable valve (not shown). The second stirred tank 160 is provided with a second raw material liquid supply port 166 for introducing the raw material liquid (referred to as second raw material liquid 108b) flowing from the first stirred tank 140 into the inside via the raw material liquid flow pipe 154. The second raw material liquid 108b can be continuously or intermittently supplied into the second stirred tank 160 through the second raw material liquid supply port 166. The second raw material liquid 108b supplied into the second stirred tank 160 through the second raw material liquid supply port 166 is stored in a second reservoir 166 located below the second stirred tank 160.

[0029] A second temperature control jacket 180 is provided around the second stirred tank 160 to control the temperature inside the second stirred tank 160, specifically, the temperature of the second inner wall 161 that constitutes the inside of the second stirred tank 160. The second temperature control jacket 180 can be arranged to cover the entire outer side surface of the second stirred tank 160 continuously or intermittently, for example, so that the entire surface of the second inner wall 161 can be heated. Alternatively, the second temperature control jacket 180 can be arranged to cover the outer bottom surface and the entire outer side surface of the second stirred tank 180. The type and shape of the second temperature control jacket 180 are not particularly limited as long as it can be heated to a temperature that can volatilize the volatile components in the raw material liquid flowing down the surface of the second inner wall 161.

[0030] 1, such a second temperature control jacket 180 communicates with the first stirred tank 110 through a first volatile component flow pipe 182 provided at the volatile component outlet 106. The first raw material liquid 108a discharged from the volatile component outlet 106 of the first stirred tank 110 is directly supplied into the second temperature control jacket 180, and the second inner wall 161 of the second stirred tank 160 is heated. After the second inner wall 162 is heated, the volatile components in the second temperature control jacket 180 are discharged to the outside through a discharge pipe 194.

[0031] Here, the evaporation apparatus 100 of the present invention is set so that the first stirred tank 110 and the second stirred tank 160 have different internal pressures. In the embodiment shown in Fig. 1, the inside of the second stirred tank 160 is connected to a condenser (not shown) via a pipe 192, and the internal pressure of the second stirred tank 160 is set to be lower than the internal pressure of the first stirred tank 110.

[0032] As a result, the volatile components of the first raw material liquid 108a introduced into the second temperature-regulating jacket 180 via the first volatile component flow pipe 182 can heat the second inner wall 162 of the second stirred tank 160 through that temperature. Then, due to this heating, the volatile components of the second raw material liquid 108b present in the second stirred tank 160 evaporate on the second inner wall 161, and can be discharged to the outside through the pipe 192.

[0033] The size (capacity) of each of the first stirred tank 110 and the second stirred tank 160 can be appropriately set depending on the application of the evaporation apparatus 100 (the type of raw material liquid to be supplied) and the processing amounts of the first raw material liquid 108a and the second processing liquid 108b, and is not necessarily limited thereto, but is, for example, 0.1 liter to 100,000 liters each.

[0034] (2) Rotation axis In the evaporation apparatus 100 of the present invention shown in FIG. 1, the rotation shaft 140 is a single shaft disposed along the vertical direction relative to each of the first stirred tank 110 and the second stirred tank 160.

[0035] The rotating shaft 140 is made of a rigid material and has, for example, a cylindrical or columnar shape. The thickness of the rotating shaft 140 is not necessarily limited, but is, for example, 8 mm to 200 mm. The length of the rotating shaft 140 varies depending on the size of the first stirred tank 110 and the second stirred tank 160 to be used, and an appropriate length can be selected by a person skilled in the art.

[0036] An upper portion of the rotating shaft 140 is connected to a rotating means such as a motor 142 arranged on the first stirred tank 110. A lower portion of the rotating shaft 140 may or may not be in contact with the inner surface of the bottom 164 of the second stirred tank 160. For example, as shown in FIG. 1, the lower portion of the rotating shaft 140 may be arranged at a position spaced a certain distance from the inner surface of the bottom 164 of the second stirred tank 160.

[0037] The rotation speed of the rotating shaft 140 varies depending on the viscosity of the first raw material liquid 108a and the second raw material liquid 108b used, the size of the first stirred tank 110 and the second stirred tank 160, the amount of the first raw material liquid 108a contained in the first reservoir 116 of the first stirred tank 110, the amount of the second raw material liquid 108b contained in the second reservoir 166 of the second stirred tank 160, etc., and is not necessarily limited thereto, but is, for example, 30 rpm to 500 rpm.

[0038] (3) First and second dispersing units The first spray section 130 shown in FIG. 1 is capable of spraying the first raw material liquid 108a contained in the first storage section 116 into the first stirring tank 110, and is attached to the rotating shaft 140, for example, via mounting fixtures 151a and 153a.

[0039] The first percolation section 130 comprises at least one first percolation device 132 comprising a first lower end 134 , a first upper end 136 , and a first flow passage 138 .

[0040] The first liquid-spraying device 132 can absorb the first raw material liquid 108a stored in the first storage section 116 from the first lower end 134 as the rotating shaft 140 rotates, and discharge it from the first upper end 136 through the first flow path 138. In the embodiment shown in FIG. 1, the first liquid-spraying device 132 is designed to have a length such that the first upper end 136 is disposed near the first inner wall 111 of the first stirring tank 110 by attachment to the rotating shaft 140. As a result, the first raw material liquid 108a absorbed from the first lower end 134 through the rotation of the rotating shaft 140 is discharged toward the first inner wall 111 of the first stirring tank 110, and can collide with the first inner wall 111. Thereafter, first raw material liquid 108a that has collided with first inner wall 111 continues to flow down on first inner wall 111, during which the volatile components in first raw material liquid 108a can be effectively evaporated by heat emitted from first inner wall 111. Meanwhile, first raw material liquid 108a after the volatile components have evaporated continues to flow down first inner wall 111 and is again stored in first storage section 116.

[0041] In the first sprinkling section 130 (first sprinkling device 132) shown in FIG. 1, the first lower end 134 of the first sprinkling device 132 is inclined relative to the axis of the rotating shaft 140 so that it is located closer to the axis of the rotating shaft 140 than the first upper end 136. That is, in the first sprinkling section 130, the first sprinkling device 132 is inclined relative to the rotating shaft 140 so that the shortest distance between the first lower end 134 of the first sprinkling device 132 and the axis of the rotating shaft 140 is shorter than the shortest distance between the first upper end 136 and the axis of the rotating shaft 140.

[0042] 1, the first sprinkling device 132 is attached at a predetermined angle (also called the mounting tilt angle) θ1 with respect to the axial direction of the rotating shaft 140. The mounting tilt angle θ1 can be set to any angle by those skilled in the art, and is, for example, 10° to 45°, preferably 15° to 25°.

[0043] In FIG. 1, two first sprinkling devices 132 are provided facing each other through the axis of the rotating shaft 140. Here, the number of first sprinkling devices 132 that can be provided in the evaporation apparatus 100 of the present invention is not necessarily limited, but is, for example, at least one, preferably two to eight, and more preferably two to six. When a plurality of first sprinkling devices 132 are used, the first sprinkling devices 132 may be provided facing each other through the axis of the rotating shaft. In addition, when a plurality of first sprinkling devices 132 are used, they are preferably mounted at approximately equal angles around the axis of the rotating shaft 140.

[0044] FIG. 2 is a perspective view of a first sprinkling device 132 constituting the sprinkling section 130 of the evaporation apparatus 100 shown in FIG.

[0045] In FIG. 2, the first sprinkling device 132 may be, for example, one that is processed into a cylindrical shape (e.g., a cylindrical, elliptical, or angular cylindrical shape) as a whole, or one in which the first lower end portion 134 and the second upper end portion 136 have a so-called gutter-like shape such as a semi-cylinder, semi-angular cylinder, or V-shape, and the intermediate portion therebetween is processed into a cylindrical shape (e.g., a cylindrical, elliptical, or angular cylindrical shape), or one in which only the second lower end portion 134 has such a gutter-like shape, and the remaining portions are processed into a cylindrical shape (e.g., a cylindrical, elliptical, or angular cylindrical shape).

[0046] The size of the first sprinkling device 132 is not particularly limited, but for example, when the first sprinkling device 132 is an entirely cylindrical member as shown in FIG. 2, the inner diameter of the cylindrical portion is, for example, 2 mm to 200 mm. The length from the first lower end 134 to the first upper end 136 (i.e., the length of the first flow path 138) is not necessarily limited, and an appropriate length can be selected by a person skilled in the art depending on, for example, the length selected for the first sprinkling device 132, the size of the first stirring tank 110 to be incorporated, the size of the mounting inclination angle θ1, etc. In addition, in FIG. 2, the inner diameter of the first lower end 134, the inner diameter of the first flow path 138, and the inner diameter of the first upper end 136 are described as if they were approximately the same size, but the present invention is not limited to only such a form. For example, the inner diameter of the first sprinkling device 132 (the inner diameter of the first flow path 138) may be gradually or stepwise reduced in diameter from the first lower end 134 to the first upper end 136, or the inner diameter of the first sprinkling device 132 (the inner diameter of the first flow path 138) may be gradually or stepwise increased in diameter from the first lower end 134 to the first upper end 136.

[0047] Although the overall cylindrical sprinkling device 132 has been described in FIG. 2, the sprinkling device 132 may have a trough-like shape as shown in FIG.

[0048] In FIG. 2, the first sprinkling device 132 is composed of a first lower end 134', a first upper end 136', and a first flow path 138' between them. The first flow path 138' may have a so-called half-pipe shape, such as a semi-cylindrical shape, a semi-rectangular tubular shape, or a V-shape. The length from the first lower end 134' to the first upper end 134' (i.e., the length of the first flow path 138') is not necessarily limited, and an appropriate length can be selected by a person skilled in the art depending on, for example, the length selected for the first sprinkling device 132, the size of the stirring tank to be incorporated, the size of the mounting inclination angle θ1, and the like.

[0049] In the evaporation apparatus of the present invention, when the trough-shaped sprinkling device 132 shown in FIG. 3 is employed, the first flow path 138' of the sprinkling device 132 is attached in the forward direction along the rotation direction of the rotating shaft.

[0050] Referring again to Figure 1, the second spray section 170 shown in Figure 1 can spray the second raw material liquid 108b contained in the second storage section 166 into the second stirring tank 160, and is attached to the rotating shaft 140, for example, via mounting fixtures 151b, 153b.

[0051] The second perfusion section 170 comprises at least one second perfusion device 172 comprising a second lower end 174 , a second upper end 176 , and a second flow passage 178 .

[0052] The second liquid-spraying device 172 can absorb the second raw material liquid 108b stored in the second storage section 166 from the second lower end 174 as the rotating shaft 140 rotates, and discharge it from the second upper end 176 through the second flow path 178. In the embodiment shown in FIG. 1, the second liquid-spraying device 172 is designed to have a length such that the second upper end 176 is disposed near the second inner wall 161 of the second stirring tank 160 by attachment to the rotating shaft 140. As a result, the second raw material liquid 108b absorbed from the second lower end 174 through the rotation of the rotating shaft 140 is discharged toward the second inner wall 161 of the second stirring tank 160, and can collide with the second inner wall 161. Thereafter, second raw material liquid 108b that has collided with second inner wall 161 continues to flow down on second inner wall 161, during which the volatile components in second raw material liquid 108b can be effectively evaporated by heat emitted from second inner wall 161. Meanwhile, second raw material liquid 108b after the volatile components have evaporated continues to flow down second inner wall 161 and is again stored in second storage section 166.

[0053] In the second sprinkling section 170 (first sprinkling device 172) shown in FIG. 1, the second lower end 174 of the second sprinkling device 172 is inclined relative to the axis of the rotating shaft 140 so that it is located closer to the axis than the second upper end 176. That is, in the second sprinkling section 170, the second sprinkling device 172 is inclined relative to the rotating shaft 140 so that the shortest distance between the second lower end 174 of the second sprinkling device 172 and the axis of the rotating shaft 140 is shorter than the shortest distance between the second upper end 176 and the axis of the rotating shaft 140.

[0054] 1, the second sprinkling device 172 is attached at a predetermined angle (also called the mounting inclination angle) θ2 with respect to the axial direction of the rotating shaft 140. The mounting inclination angle θ2 can be set to any angle by those skilled in the art, and is, for example, 10° to 45°, preferably 15° to 25°.

[0055] In FIG. 1, two second sprinkling devices 172 are provided facing each other through the axis of the rotating shaft 140. Here, the number of second sprinkling devices 172 that can be provided in the evaporation apparatus 100 of the present invention is not necessarily limited, but is, for example, at least one, preferably two to eight, and more preferably two to six. When a plurality of second sprinkling devices 172 are used, the second sprinkling devices 172 may be provided facing each other through the axis of the rotating shaft. In addition, when a plurality of second sprinkling devices 172 are used, they are preferably mounted at approximately equal angles around the axis of the rotating shaft 140. The number of second sprinkling devices 132 constituting the second sprinkling section 170 may be the same as or different from the number of first sprinkling devices 132 constituting the first sprinkling section 130.

[0056] The shape of the second sprinkling device 172 may be the same as the shape of the cylindrical first sprinkling device 132 as shown in Figure 2 above, or may be the same as the shape of the trough-shaped first sprinkling device 132 as shown in Figure 2 above.

[0057] (4) Materials of the evaporator The materials constituting the first stirring tank 110, the second stirring tank 160, the rotating shaft 140, the first liquid-spraying section 130 (first liquid-spraying device 132) and the second liquid-spraying section 170 (second liquid-spraying device 172) are not particularly limited, but examples thereof include metals such as iron, stainless steel, titanium, Hastelloy or copper; synthetic resins such as polylactic acid, polypropylene, polystyrene, polycarbonate, acrylate resin, ABS (acrylonitrile butadiene styrene) resin, epoxy resin, urea resin, Teflon (registered trademark), and combinations thereof. Furthermore, among these components, coatings known in the art such as Teflon (registered trademark) or rubber lining may be applied to the parts that may come into contact with the first raw material liquid 108a and / or the second raw material liquid 108b, in particular, to enhance chemical resistance.

[0058] (5) Separation of volatile components from the raw liquid Using the evaporation apparatus 100 of the present invention shown in FIG. 1, a volatile component can be separated from a raw material liquid as follows.

[0059] First, the raw material liquid supplied from a raw material tank (not shown) attached to the outside of the first stirring tank 110 is continuously or intermittently supplied from the raw material liquid supply port 117 into the first storage section 116 of the first stirring tank 110, and the first raw material liquid 108a is stored in the first storage section 116. Here, the first raw material liquid 108a is supplied until its liquid level is located above the first lower end 134 of the first sprinkling device constituting the first sprinkling section 130. As a result, in a stationary state (a state before the rotation of the rotating shaft 140), the first lower end 134 of the first sprinkling device 132 is immersed in the first raw material liquid 108a in the first storage section 116.

[0060] Thereafter, when the motor 142 is rotated, the first sprinkling device 132 constituting the first sprinkling section 130 rotates around the axis of the rotation shaft 140 in accordance with the rotation of the rotation shaft 140 .

[0061] Here, in the first sprinkling device 132, the first lower end 134 rotates horizontally within the first storage section 116, and the first raw material liquid 108a contained in the first storage section 116 is scooped up from the first lower end 134. Next, the first raw material liquid 108a scooped up from the first lower end 134 moves from the bottom to the top in the first flow path 138 by the centrifugal force accompanying the rotation of the first sprinkling device 132, and is discharged from the first upper end 136 toward the first inner wall 111 of the first stirring tank 110. Thereafter, as described above, the first raw material liquid 108a flows down the first inner wall 111, and while flowing down, the volatile components in the first raw material liquid 108a evaporate through the first inner wall 111 heated by the first temperature control jacket 145, and are discharged from the volatile component outlet 106 provided above to the outside of the first stirred tank 110. Meanwhile, the first raw material liquid 108a from which the volatile components have been removed further flows down the first inner wall 111, and is again stored in the first reservoir 116.

[0062] Furthermore, as the supply of the raw material liquid from the raw material liquid supply port 117 continues, the liquid level of the first raw material liquid 108a contained in the first storage section 116 rises, and when it reaches a predetermined liquid amount, the control valve 152 is opened by a signal from the level indicator 156, and the first raw material liquid 108a contained in the first storage section 116 of the first stirred tank 110 flows into the second stirred tank 160 through the raw material liquid circulation pipe 154. Here, in the evaporation apparatus 100 shown in FIG. 1, the internal pressure of the second stirred tank 160 is set to be lower than the internal pressure of the first stirred tank 110, so that the flow of the first raw material liquid 108a through the raw material liquid circulation pipe 154 is smoothly performed.

[0063] As a result, the raw material liquid that has entered the second stirred tank 160 is stored in the second reservoir 116 located below the second stirred tank 160 as the second raw material liquid 108b.

[0064] In the second storage section 166 of the second stirring tank 160, the amount of the second raw material liquid 108b stored therein increases, and when the liquid level rises above the second lower end 174 of the second sprinkling device 172 constituting the second sprinkling section 170, the second lower end 174 rotates horizontally within the second storage section 166 due to the rotation of the rotating shaft 140, and the second raw material liquid 108b stored in the second storage section 166 is scooped up from the second lower end 174. Next, the second raw material liquid 108b scooped up from the second lower end 174 moves from the bottom to the top in the second flow path 178 due to the centrifugal force associated with the rotation of the second sprinkling device 172, and is discharged from the second upper end 176 toward the second inner wall 161 of the second stirring tank 160. Thereafter, the second raw material liquid 108b flows down the second inner wall 161 as described above.

[0065] On the other hand, the volatile components evaporated from the first raw material liquid 108a pass through the first volatile component flow pipe 182 from the volatile component outlet 106 of the first stirred tank 110 while still at a high temperature, and are supplied into the second temperature control jacket 180. Then, the thermal energy of the volatile components is transferred to the second stirred tank 160, and heats the second inner wall 161. Then, the volatile components are discharged to the outside through the discharge pipe 194 provided in the second temperature control jacket 180.

[0066] In this state, the volatile components remaining in the second raw material liquid 108b flowing down the second inner wall 161 evaporate on the second inner wall 161, partly because the internal pressure of the second stirred tank 160 is in a low state, and are discharged from the second stirred tank 160 to the outside via the pipe 192. The components that do not evaporate as they flow down the second inner wall 161 continue to flow down the second inner wall 161, and are stored again in the second reservoir 166.

[0067] The volatile components discharged from the discharge pipe 194 and the pipe 192 are collected together as necessary, and condensed and recovered by a condenser (not shown).

[0068] The second raw material liquid 108 b accommodated in the second reservoir 166 of the second stirred tank 160 again is finally discharged to the outside of the second stirred tank 160 via the raw material liquid discharge pipe 162 .

[0069] In this manner, the evaporator 100 of the present invention can be used to easily separate volatile components from the raw material liquid.

[0070] (6) Other embodiments FIG. 4 is a cross-sectional view that illustrates a schematic diagram of another example of the evaporation device of the present invention.

[0071] 4 includes a first stirred tank 210, a second stirred tank 260, a rotating shaft 140, a first liquid-spraying section 130, and a second liquid-spraying section 170. In the evaporation apparatus 200 of the present invention, the first stirred tank 210 is disposed above the second stirred tank 260 in a stacked manner.

[0072] Here, the rotating shaft 140, the first liquid-spraying section 130 and the second liquid-spraying section 170 constituting the evaporation apparatus 200 shown in FIG. 4 are the same as those described in the evaporation apparatus 100 shown in FIG.

[0073] In the evaporation apparatus 200 of Fig. 4, the first stirred tank 210 is connected to a condenser (not shown) via a pipe 292, and the internal pressure of the first stirred tank 210 is set to be lower than the internal pressure of the second stirred tank 260. This condenser is connected to a vacuum pump (not shown).

[0074] A first temperature control jacket 245 is disposed around the outer periphery of the first stirred tank 210, and a first inner wall 211 of the first stirred tank 210 can be heated by volatile components evaporated from the second raw material liquid 208b flowing in through a second volatile component flow pipe 282 (described later). The volatile components having heated the first inner wall 211 are discharged to the outside through a discharge pipe 294.

[0075] The first stirring tank 210 has a first storage section 216 at the bottom for storing the first raw material liquid 208a, and the first raw material liquid 208a is stored in the first storage section 216 such that its liquid level is located above the first lower end section 134 of the first spraying device 132 that constitutes the first spraying section 130 when the liquid is left stationary.

[0076] A level indicator 156 is connected to the first storage section 216, and when the first raw material liquid 208a contained in the first storage section 216 reaches a predetermined liquid volume (i.e., a predetermined liquid level), a signal from the level indicator 156 opens the control valve 152 and operates the pump 255 with a pressure reducing check valve, so that the first raw material liquid 208a contained in the first storage section 216 of the first stirring tank 210 flows into the second stirring tank 260 via the raw material liquid flow pipe 154. Then, when the first raw material liquid 208a contained in the first storage section 216 falls below the above-mentioned or separately set liquid amount (i.e., the above-mentioned or separately set liquid level), a signal from the level indicator 156 closes the control valve 152 and stops the pump 255 with a pressure reducing check valve, so that the first raw material liquid 208a contained in the first storage section 216 of the first stirring tank 210 stops flowing to the second stirring tank 260 via the raw material liquid circulation pipe 154.

[0077] On the other hand, in the second stirring tank 260, the raw material liquid is introduced via the raw material liquid flow pipe 154 and is stored as second raw material liquid 208b in a second reservoir 266 provided below.

[0078] A second temperature control jacket 280 is provided around the second stirring tank 260 to control the temperature inside the second stirring tank 260, specifically, the temperature of the second inner wall 261 that constitutes the inside of the second stirring tank 260. The second temperature control jacket 280 can be arranged to cover the entire outer side surface of the second stirring tank 260 continuously or intermittently, for example, to enable heating of the entire surface of the second inner wall 261. Alternatively, the second temperature control jacket 280 can be arranged to cover the outer bottom surface and the entire outer side surface of the second stirring tank 280. The second temperature control jacket 280 is provided with a heating medium introduction pipe 243 for introducing a heating medium such as steam into the inside, and a heating medium discharge pipe 244 for discharging the heating medium to the outside of the second temperature control jacket 280.

[0079] The first stirred tank 210 and the second stirred tank 260 are made of the same material and have the same size as the first stirred tank 110 and the second stirred tank 160 constituting the evaporation apparatus 100 shown in FIG.

[0080] Using the evaporation apparatus 200 of the present invention shown in FIG. 4, volatile components can be separated from the raw material liquid as follows.

[0081] First, the raw material liquid supplied from a raw material tank (not shown) attached to the outside of the first stirring tank 210 is continuously or intermittently supplied from the raw material liquid supply port 117 into the first storage section 216 of the first stirring tank 210, and the first raw material liquid 208a is stored in the first storage section 216. Here, the first raw material liquid 208a is supplied until its liquid level is located above the first lower end 134 of the first sprinkling device constituting the first sprinkling section 130. As a result, in a stationary state (a state before the rotation of the rotating shaft 140), the first lower end 134 of the first sprinkling device 132 is immersed in the first raw material liquid 208a in the first storage section 116.

[0082] Thereafter, when the motor 142 is rotated, the first sprinkling device 132 constituting the first sprinkling section 130 rotates around the axis of the rotation shaft 140 in accordance with the rotation of the rotation shaft 140 .

[0083] Here, in the first sprinkling device 132, the first raw material liquid 208a contained in the first storage section 216 is scooped up from the first lower end 134. Next, the first raw material liquid 108a scooped up from the first lower end 134 moves from the bottom to the top in the first flow path 138 by the centrifugal force accompanying the rotation of the first sprinkling device 132, and is discharged from the first upper end 136 toward the first inner wall 211 of the first stirring tank 210.

[0084] Thereafter, as described above, the first raw material liquid 208a flows down the second inner wall 211, and while flowing down, the volatile components in the first raw material liquid 208a evaporate through the first inner wall 111 heated by the first temperature control jacket 245, and are discharged to the outside of the first stirred tank 210 through the pipe 292 provided above. Meanwhile, the first raw material liquid 208a from which the volatile components have been removed further flows down the first inner wall 211, and is again stored in the first storage section 216.

[0085] Furthermore, when the supply of the raw material liquid from the raw material liquid supply port 117 continues, the liquid level of the first raw material liquid 208a contained in the first storage section 216 rises, and when it reaches a predetermined liquid amount, the control valve 152 is opened by a signal from the level indicator 156, and the pump 255 with a pressure reducing check valve is operated. Thereafter, the first raw material liquid 208a contained in the first storage section 216 of the first stirred tank 210 flows into the second stirred tank 260 through the raw material liquid flow pipe 154. Here, in the evaporation device 200 shown in FIG. 4, the internal pressure of the first stirred tank 210 is set to be lower than the internal pressure of the second stirred tank 260 as described above, but the first raw material liquid 208a passing through the raw material liquid flow pipe 154 moves toward the second stirred tank 260 by the pump 255 with a pressure reducing check valve.

[0086] As a result, the raw material liquid that has entered the second stirred tank 160 is stored in the second reservoir 116 located below the second stirred tank 160 as the second raw material liquid 108b.

[0087] In the second storage section 266 of the second stirring tank 260, the amount of the second raw material liquid 208b stored therein increases, and when the liquid level rises above the second lower end 174 of the second sprinkling device 172 constituting the second sprinkling section 170, the second lower end 174 rotates horizontally within the second storage section 266 due to the rotation of the rotating shaft 140, and the second raw material liquid 208b stored in the second storage section 266 is scooped up from the second lower end 174. Next, the second raw material liquid 208b scooped up from the second lower end 174 moves from the bottom to the top in the second flow path 178 due to the centrifugal force associated with the rotation of the second sprinkling device 172, and is discharged from the second upper end 176 toward the second inner wall 261 of the second stirring tank 160. Thereafter, the second raw material liquid 208b flows down the second inner wall 261 as described above.

[0088] In this state, the volatile components remaining in the second raw material liquid 208b flowing down the second inner wall 261 evaporate on the second inner wall 261, and are supplied from the second stirring tank 260 to the first temperature control jacket 245 through the second volatile component flow pipe 282 while retaining high thermal energy. The components that do not evaporate as they flow down the second inner wall 261 flow down the second inner wall 261 as they are, and are stored in the second storage section 266 again.

[0089] The volatile components discharged from the discharge pipe 294 and the pipe 292 are collected together as necessary, and condensed and recovered by a condenser (not shown).

[0090] The second raw material liquid 208 b accommodated in the second reservoir 266 of the second stirred tank 260 again is finally discharged to the outside of the second stirred tank 260 via the raw material liquid discharge pipe 162 .

[0091] In this manner, the evaporator 200 of the present invention can be used to easily separate volatile components from the raw material liquid.

[0092] 2. Evaporation device

[0093] FIG. 5 is a diagram illustrating an example of an evaporation system including an evaporation device of the present invention.

[0094] The evaporation system 900 of the present invention includes a raw material tank 910 that contains a raw material liquid as a raw material, the evaporation device 100 described above, and a condenser 930.

[0095] The raw material liquid is fed from a raw material tank 910 through pipes 904a and 904b by driving a pump 902 to the evaporation apparatus 100. In the distillation apparatus 100, the inner wall of the first stirred tank 110 is heated through a first temperature-regulating jacket 145 by, for example, steam (STM) supplied from a pipe 143. The volatile components evaporated from the raw material liquid in the first stirred tank 110 are introduced into the second temperature-regulating jacket 180 through a first volatile component flow pipe 182, heat the inner wall of the second stirred tank 160, and then pass through a pipe 905 to be stored in a receiving tank 920.

[0096] On the other hand, the volatile components evaporated from the raw material liquid in the second stirred tank 160 pass through the pipe 192 and are supplied to the condenser 930 sucked by the vacuum pump 940, where they are cooled and then liquefied. On the other hand, the residue (concentrated raw material liquid) in the second stirred tank 160 of the evaporation apparatus 100 is discharged to the outside through the pipe 908 as necessary.

[0097] The evaporation apparatus of the present invention is useful, for example, in purifying and concentrating liquids containing impurities, such as methyl esters, lactic acid, fish oils, fats and oils, glycerin, etc.; removing water, ethanol, methyl ethyl ketone (MEK), N-methylpyrrolidone (NMP), hexane, toluene, acetone, ethylene glycol, etc. from chemical products, such as inks, paints, chemicals, etc.; and removing volatile impurities from monomers and polymers, etc., used in paint and resin manufacturing applications. [Explanation of symbols]

[0098] 100,200 Evaporation device 106 Volatile component outlet 108a, 208a First raw material liquid 108b, 208b Second raw material liquid 110,210 First mixing tank 111,211 First Inner Wall 116,216 First Reservoir 117 First raw material liquid supply port 130 First dispersing section 132 First liquid dispersion device 134, 134' First lower end 136,136' First upper end 138,138' First Channel 140 Rotational Axis 142 Motor 143,243 Heating medium introduction pipe 144,244 Heating medium discharge pipe 145,245 First temperature control jacket 152 Control valve 154 Raw material liquid flow pipe 156 Level Indicator 160,260 Second mixing tank 161,261 Second Inner Wall 162 Raw material liquid discharge pipe 164 Bottom 166 Second raw material liquid supply port 170 Second dispersing section 172 Secondary water dispersion device 174 Second Lower End 176 Second upper end 178 Second Stream 180,280 Second temperature control jacket 182 First volatile component flow pipe 192,292 tubes 194,294 Discharge pipe 255 Pump with pressure reducing check valve 282 Second volatile component flow pipe 900 Evaporation System 902 Pump 910 Raw material tank 920 Receiving Tank 930 Condenser 940 Vacuum Pump

Claims

1. 1. An evaporation device comprising: a first stirring tank that is sealable and heatable and that includes a first storage portion that contains a first raw material liquid; a second stirring tank that is sealable and heatable and that includes a second storage portion that contains a second raw material liquid; a rotating shaft disposed vertically relative to each of the first stirred tank and the second stirred tank; a first liquid dispersion unit that is attached to the rotating shaft in the first stirred tank and that disperses the first raw material liquid into the first stirred tank; a second liquid dispersion unit that is attached to the rotating shaft in the second stirred tank and that disperses the second raw material liquid into the second stirred tank; Equipped with The first stirred tank is disposed above the second stirred tank in a stacked manner; the first storage section in the first stirred tank and the second stirred tank are in communication with each other via a raw material liquid flow pipe having a control valve; The internal pressure of the first stirred tank is different from that of the second stirred tank, The first dispensing unit includes at least one first dispensing device having a first flow path that absorbs the first raw material liquid contained in the first storage unit from a first lower end and discharges the first raw material liquid from a first upper end, as the rotating shaft rotates; The evaporation apparatus includes at least one second liquid-spraying device, the second liquid-spraying section having a second flow path that absorbs the second raw material liquid stored in the second storage section from a second lower end and discharges it from a second upper end as the rotating shaft rotates.

2. 2. The evaporation apparatus according to claim 1, wherein the first stirred tank is heatable by a first temperature-regulating jacket provided on the outer periphery, and the second stirred tank is heatable by a second temperature-regulating jacket provided on the outer periphery.

3. 2. The evaporation apparatus according to claim 1, wherein the first stirred tank is provided with a volatile component outlet, and the volatile component outlet is in communication with a second temperature control jacket provided on the second stirred tank via a first volatile component flow pipe.

4. 4. The evaporation apparatus according to claim 3, wherein an internal pressure of the second stirred tank is set lower than an internal pressure of the first stirred tank.

5. 2. The evaporation apparatus according to claim 1, wherein the second stirred tank is provided with a volatile component outlet, and the volatile component outlet is connected to a first temperature control jacket provided on the first stirred tank via a second volatile component flow pipe.

6. 6. The evaporation apparatus according to claim 5, wherein an internal pressure of the first stirred tank is set lower than an internal pressure of the second stirred tank.

7. The evaporation apparatus according to claim 6 , further comprising a liquid delivery pump disposed in the raw material liquid flow pipe.

8. A raw material tank containing a raw material liquid; an evaporation apparatus according to any one of claims 1 to 7, which treats the raw material liquid supplied from the raw material tank; a condenser for condensing the volatile components discharged from a volatile component outlet of the evaporator; An evaporation system comprising:

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