JP2016209779A - Evaporation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an evaporation system capable of efficiently evaporating a volatile component from a raw material liquid, reducing a pipeline and the number of attachments and efficiently recovering a solvent and a residue from the raw material liquid.SOLUTION: An evaporation system includes an evaporator, a compressor and a receiver. The evaporator includes: an agitation tank storing a raw material liquid and having a volatile component outlet and a residue outlet; a hollow jacket being disposed at the outer periphery of the agitation tank and having a jacket inlet and a jacket outlet; and a liquid spraying portion being disposed in the agitation tank and flowing down the raw material liquid on the inner wall of the agitation tank. The compressor has a compressor inlet and a compressor outlet. The volatile component outlet of the evaporator and the compressor inlet are connected via a pipe, the compressor outlet and the jacket inlet of the evaporator are connected via a pipe and the volatile component of the raw material liquid supplied from the compressor inlet is compressed by the compressor and discharged through the compressor outlet. The receiver is connected to the jacket outlet of the evaporator via a pipe.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an evaporation system, and more particularly to an evaporation system that can reduce the number of pipes and attached devices and can efficiently recover and concentrate a solvent from a raw material liquid.

  For example, in the fields of the food industry and the chemical industry, an evaporation system combining a liquid tank and piping is used for recovering or concentrating a solvent from a liquid containing impurities and impurities.

  FIG. 7 is a diagram schematically showing a conventional evaporation system.

  The evaporation system 700 includes a raw material tank 710 containing a raw material liquid as a raw material, a compressor 720, and a reboiler 730. The raw material liquid in the raw material tank 710 is heated by a coil heater 711 provided in the raw material tank 710, and the vapor is supplied to a compressor 720 through a pipe 714 from a volatile component outlet 712 provided above the raw material tank 710. . The vapor of the raw material liquid is pressurized by the compressor 720 to increase the boiling point, and is supplied to the reboiler 730 through the pipe 716. On the other hand, a pipe 718 extending from the raw material liquid outlet 722 and connected to the circulation pump 740 is provided at the bottom of the raw material tank 710. Further, the circulation pump 740 is connected to the reboiler 730 through a pipe 722. By operating the circulation pump 740, the raw material liquid is supplied from the bottom of the raw material tank 710 to the reboiler 730 through the pipes 718 and 723.

  Here, the reboiler 730 functions as a heat pump, and the raw material liquid supplied to the reboiler 730 through the pipe 723 is heated by the heat of the vapor of the raw material liquid supplied through the pipe 716. In the reboiler 730, the vapor of the raw material liquid supplied through the pipe 716 and the raw material liquid supplied to the reboiler 730 through the pipe 723 are structurally separated without mixing, and only the heat exchange between them is performed. Done. Thereby, the vapor of the raw material liquid supplied through the pipe 716 is liquefied again and collected in the receiver 750 through the pipe 724. On the other hand, the raw material liquid supplied to the reboiler 730 through the pipe 723 is also heated by the reboiler 730 to have a higher temperature, and is supplied again to the raw material tank 710 through the pipe 726.

  As described above, the conventional evaporation system 700 can efficiently evaporate the raw material liquid by arranging the plurality of pipes using the compressor 720 and the reboiler 730, efficiently using the heat added to the raw material liquid.

  However, the evaporation system 700 requires a complicated piping structure and an accessory device such as a reboiler as described above, and further improvements are required in terms of manufacturing cost and maintenance. Further, since the raw material liquid in the raw material tank 710 is heated only by the coil heater 711, the evaporation amount varies depending on the capacity of the raw material liquid in the raw material tank 710, and the raw material liquid is evaporated more stably and efficiently. It was difficult.

  An object of the present invention is to solve the above problems, and the object of the present invention is to more efficiently evaporate volatile components from the raw material liquid, reduce the number of pipes and attached devices, and reduce the raw material liquid. It is an object of the present invention to provide an evaporation system that can efficiently recover a solvent and a residue.

The present invention is an evaporation system comprising an evaporation device, a compressor, and a receiver,
The evaporator is
A stirring tank containing the raw material liquid and having a volatile component outlet and a residue outlet;
A hollow jacket provided on the outer periphery of the stirring tank and having a jacket inlet and a jacket outlet;
A spraying part that is provided in the stirring tank and flows down the raw material liquid to the inner wall of the stirring tank;
With
here,
The liquid dispersion part of the evaporator is a rotating shaft and a flow path through which the raw material liquid temporarily stored in the stirring tank as the rotating shaft rotates flows from below to above the stirring tank. And at least one hook-shaped member attached to the rotating shaft;
The compressor includes a compressor inlet and a compressor outlet, the volatile component outlet of the evaporator communicates with the compressor inlet via a pipe, and the compressor outlet and the jacket inlet of the evaporator pass via a pipe. And the compressor pressurizes and discharges the volatile components of the raw material liquid supplied from the compressor inlet through the compressor outlet;
The receiver communicates with the jacket outlet of the evaporator via a tube;
System.

  In one embodiment, the temperature of the volatile component of the raw material liquid in the hollow jacket is set higher than the temperature of the raw material liquid in the stirring tank.

  In one embodiment, the agitation tank includes a raw material liquid supply port for supplying the raw material liquid, and a first auxiliary heater for heating the raw material liquid upstream of the raw material liquid supply port.

  In one embodiment, the evaporator includes a second auxiliary heater for heating the raw material liquid in the stirring tank.

  In a further embodiment, the second auxiliary heater is provided alongside the hollow jacket on the outer periphery of the stirring tank.

  In a further embodiment, the second auxiliary heater is provided in the stirring tank.

  In one embodiment, the jacket communicates with a pipe for introducing a volatile component heated by means other than the compressor in addition to the volatile component of the raw material liquid pressurized by the compressor.

  In one embodiment, a splash prevention device is provided at the upper end of the flow path in the bowl-shaped member, and the raw material liquid flowing in the flow path from the stirring tank is passed through the splash prevention tool. It flows down to the inner wall of the stirring tank.

  According to the present invention, energy required for heat can be reduced and a volatile component can be efficiently evaporated from a raw material liquid without providing an auxiliary device such as a reboiler and complicated piping.

It is the schematic which shows an example of the evaporation system of this invention. It is a perspective view which represents typically an example of the bowl-shaped member which can be used for the spray part of the evaporation apparatus which comprises the evaporation system of this invention. It is the schematic which shows another example of the evaporation system of this invention. It is the schematic which shows another example of the evaporation system of this invention. It is the schematic which shows another example of the evaporation system of this invention. It is the schematic which shows another example of the evaporation system of this invention. It is a figure which represents the conventional evaporation system typically.

  The evaporation system of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a schematic view showing an example of the evaporation system of the present invention. The evaporation system 100 of the present invention includes an evaporation device 102, a compressor 120, and a receiver 150.

  In the present invention, the evaporation apparatus 102 further includes a stirring tank 110, a hollow jacket 160, and a spraying unit 170.

  The agitation tank 110 is a tank capable of containing a raw material liquid and having a volatile component outlet 112 and a residue outlet 122 and capable of containing and stirring liquids such as an aqueous solution and a slurry. In FIG. 1, the volatile component outlet 112 is provided above the stirring tank 110, and volatile components generated by evaporation of constituent components of the raw material liquid described later can be discharged to the outside through the outlet 112. On the other hand, in FIG. 1, the residue outlet 122 is provided at the bottom of the stirring tank 110, preferably at the center of the bottom, and the residue (for example, concentrated liquid) remaining after the constituents of the raw material liquid described later are evaporated It can be discharged to the outside through the outlet 122.

  The size (capacity) of the agitation tank 110 is not necessarily limited because it can be appropriately set depending on the use of the evaporation apparatus 102 (type of raw material liquid to be provided), the processing amount of the raw material liquid, and the like. Liters to 80,000 liters. Although the material which comprises the stirring tank 110 is not specifically limited, For example, from the reason that it is stable with respect to various raw material liquids, is excellent in thermal conductivity, and is easy to obtain and process, iron, stainless steel, It is preferably composed of a metal such as titanium, hastelloy or copper. The inner wall 111 of the stirring tank 110 may be provided with a coating known in the art such as Teflon (registered trademark), glass lining, and rubber lining in order to improve chemical resistance.

  In the evaporation system 100 shown in FIG. 1, the evaporation apparatus 102 is provided with a raw material liquid supply port 162 for supplying a raw material liquid into the tank 110 above the stirring tank 110. The raw material liquid is supplied into the stirring tank 110 from the raw material liquid supply port 162 through the pipe 164. In the embodiment shown in FIG. 1, a first auxiliary heater 166 for heating the raw material liquid is provided upstream of the raw material liquid supply port 162 in order to increase the evaporation efficiency of the raw material liquid in the stirring tank 110. . The type of the first auxiliary heater 166 shown in FIG. 1 is not particularly limited as long as the raw material liquid can be preliminarily heated using a high-temperature fluid such as steam. Those known to those skilled in the art can be employed.

  The evaporation apparatus 102 also includes a storage unit 117 for temporarily storing the raw material liquid that has flowed into the stirring tank 110 from the raw material liquid supply port 162. In FIG. 1, the reservoir 117 is a region surrounded by a part of the bottom of the stirring tank 110 and a part of the inner wall 111. The raw material liquid stored in the storage unit 117 is concentrated by an operation described later, and a residue such as the concentrated liquid can be discharged to the outside from the residue outlet 122 as necessary.

  In the evaporation system 100 shown in FIG. 1, the upper part of the stirring tank 110 may also have an openable / closable structure (not shown) such as a lid or a maintenance hole.

  The hollow jacket 160 is provided on the outer periphery of the stirring tank 110 and has a jacket inlet 167 and a jacket outlet 168.

  The hollow jacket 160 is arrange | positioned so that at least one part of the side part of the stirring tank 110 may be covered, for example. Or the hollow jacket 160 may cover from the bottom part of the stirring tank 110 to the side part. In FIG. 1, the hollow jacket 160 covers about 2/3 of the bottom of the agitation tank 110 and below the side surface, but the present invention is not necessarily limited to such a configuration. The hollow jacket 160 may be arranged so as to cover from the bottom to the side surface and further to the top of the stirring tank 110.

  The hollow jacket 160 can take in the volatile component of the raw material liquid supplied by being pressurized from the compressor 120 described later from the jacket inlet 167, and can fill the jacket with the volatile component.

  The hollow jacket 160 also includes a heat transfer surface made of a material having excellent thermal conductivity (for example, a metal such as stainless steel, iron, or copper). With the heat transfer surface, it is possible to transmit the latent heat of the volatile components of the raw material liquid existing in the hollow jacket 160 to the inner wall 111 of the stirring tank 110.

  In the evaporation apparatus 102, the spray unit 170 includes a rotating shaft 171 and a bowl-shaped member 173 attached to the rotating shaft 171. The spray unit 170 is a flow path in which the raw material liquid stored in the storage unit 117 is provided along the length direction of the bowl-shaped member 173 by rotating the rotating shaft 171 through the motor 174 provided above. The raw material liquid pumped from the reservoir 117 in this way can be sprayed toward the inner wall 111 of the agitation tank 110 by flowing through the agitation tank 110 from below to above. As a result, the sprayed raw material liquid flows down the heated inner wall 111 again to form a wet surface on the inner wall 111, and at this time, evaporation of volatile components contained in the raw material liquid can be promoted.

  The rotating shaft 171 is a shaft made of a metal having rigidity such as iron, stainless steel, hastelloy, titanium, and has a cylindrical or columnar shape, for example. The rotating shaft 171 is normally arranged in the vertical direction in the stirring tank 110. Although the thickness of the rotating shaft 171 is not necessarily limited, For example, it is 8 mm-200 mm. The length of the rotating shaft 171 varies depending on the size of the stirring tank 110 to be used, and an appropriate length can be selected by those skilled in the art.

  In the evaporation apparatus 102 shown in FIG. 1, two bowl-shaped members 173 are symmetrically arranged around the rotation shaft 171 constituting the spray unit 170 via the rotation shaft 171. Also. In FIG. 1, the two hook-shaped members 173 are provided at a predetermined angle (also referred to as an attachment inclination angle) θ toward the inner wall 111 toward the upper side around the rotation shaft 171. The attachment inclination angle θ is, for example, 5 ° to 60 °.

  In the evaporation system of the present invention, one or more, preferably 2 to 8, more preferably 2 to 6 bowl-shaped members are mounted on the rotation shaft in the evaporation apparatus. The number of the hook-shaped members to be mounted may be an odd number or an even number. In the present invention, it is preferable that these hook-shaped members are respectively mounted at substantially equal angles around the rotation axis.

  In the present invention, the flow path 176 of the bowl-shaped member 173 may have a so-called half-pipe form such as a semi-cylindrical shape, a semi-rectangular tube shape, or a V-shape, or the lower end and the upper end thereof are It may have such a shape of a harp pipe and an intermediate portion between them may be processed into a cylindrical shape. Alternatively, the bowl-shaped member 173 may include a plate-like body 173b in which a part of the semi-cylinder 173a extends along the longitudinal direction as shown in FIG. When the bowl-shaped member 173 shown in FIG. 2 is used, the liquid is drawn from the left side of FIG. 2 at the lower end of the bowl-shaped member 173 by the rotation of the rotating shaft, and the liquid reaches the upper end of the bowl-like member 173 through the rotation. To rise. At the time of this rise, the pumped liquid is blocked by the plate-like body 173b even if the bowl-shaped member 173 rotates, and is prevented from jumping out of the bowl-shaped member 173.

  The size of the hook-shaped member 173 is not particularly limited. For example, when a semi-cylindrical hook-shaped member is used, the diameter of the semi-cylindrical portion is, for example, 2 mm to 200 mm. The length from the lower end to the upper end is, for example, 40 mm to 8,000 mm. When the bowl-shaped member has a plate-like body as shown in FIG. 2, the width of the plate-like body is not necessarily limited, but is, for example, 20 mm to 300 mm. The hook-shaped member 173 is made of a material made of a metal such as iron, stainless steel, hastelloy, titanium, or a combination thereof.

  Referring to FIG. 1 again, in the evaporation system 100 of the present invention, the rotation shaft 171 in the evaporator 102 can rotate at a rotation speed suitable for pumping up the liquid in the stirring tank 110. (That is, the number of rotations of the spray unit 170) varies depending on the viscosity of the liquid, the size of the stirring tank 110, the remaining amount of the liquid in the stirring tank 110, and the like, but is not necessarily limited, for example, 30 rpm to 500 rpm .

  In the evaporation system 100 of the present invention, the compressor 120 includes a compressor inlet 182 and a compressor outlet 184. Here, the compressor inlet 182 communicates with the volatile component outlet 112 of the evaporator 102 via a pipe 183, and the compressor outlet 184 communicates with the jacket 1 inlet 67 of the hollow jacket 160 via a pipe 185. Yes. On the other hand, in the evaporation system 100 of the present invention, the receiver 150 communicates with the jacket outlet 168 of the hollow jacket 160 via the pipe 188.

  In the present invention, volatile components in the raw material liquid heated and evaporated in the evaporator 102 are supplied from the volatile component outlet 112 through the pipe 183 and supplied from the compressor inlet 182 into the compressor 120. In the compressor 120, the boiling point of the volatile component is further increased by, for example, pressurization (for example, 20 kPa to 1000 kPa, preferably 30 kPa to 700 kPa), and the temperature of the volatile component is further increased accordingly (hereinafter referred to as “high temperature”). Volatile components ”). Then, the high temperature volatile component is supplied from the compressor outlet 184 of the compressor 120 through the pipe 185 to the hollow jacket 160 through the jacket inlet 167.

  Here, the temperature of the high-temperature volatile component in the hollow jacket 160 is pressurized by the compressor 120 more than the temperature in the stirring tank 110 (for example, the temperature of the raw material liquid existing in the storage unit 117 in the stirring tank 110). Get higher. As a result, heat exchange occurs between the hollow jacket 160 and the stirring tank 110, and the high temperature volatile components are condensed and then gradually cooled, while the inner wall 111 in the stirring tank 110 is heated. As a result, the volatile component is liquefied and accumulated below the hollow jacket 160, and the liquefied volatile component is supplied from the jacket outlet 168 to the receiver 150 through the pipe 188. On the other hand, in the agitation tank 110, the inner wall 111 is heated, so that the volatile component evaporates when the raw material liquid sprayed by the spray unit 170 flows down the inner wall 111. The evaporated volatile component is supplied to the compressor 120 via the volatile component outlet 112 of the evaporator 102.

  In this way, the heat of the volatile component of the raw material liquid generated by pressurization by the compressor 120 is used to heat the inner wall 111 of the stirring tank 110 and the volatile component in the raw material liquid sprayed on the inner wall 111. Can promote evaporation. According to the evaporation system of the present invention, the raw material liquid can be efficiently evaporated without requiring a separate heat source device such as a reboiler for the raw material liquid or its volatile components. The component collected in the receiver 150 is, for example, a volatile component (for example, a solvent) of the raw material liquid. On the other hand, the component recovered from the residue outlet 122 is a residue of the raw material liquid (for example, a concentrated liquid). The recovered volatile components and / or residues can be discarded or recycled, for example, in a manner desired by those skilled in the art.

  FIG. 3 is a schematic diagram showing another example of the evaporation system of the present invention. In addition, in the evaporation system 200 shown in FIG. 3, the structure which attached | subjected the same reference number as FIG. 1 is the same as that of what was shown in the said drawing.

  The evaporation system 200 of FIG. 3 differs from the system 100 shown in FIG. 1 in that the evaporation device 202 includes a second auxiliary heater 204 for heating the raw material liquid in the stirring tank 110.

  Here, the second auxiliary heater 204 shown in FIG. 3 can provide a high-temperature fluid such as steam to the outer periphery of the stirring tank 110, and is provided alongside the hollow jacket 160 on the outer periphery of the stirring tank 110, for example. ing. By providing a heating source different from the hollow jacket 160, the inside of the stirring tank 110 can be more effectively heated through the wall constituting the stirring tank 110.

  In FIG. 3, the second auxiliary heater 204 is provided above the hollow jacket 160 with respect to the stirring tank 110, but the present invention is not necessarily limited to such a configuration. For example, the hollow jacket may cover the side surface of the stirring tank 110 and the second auxiliary heater may cover the bottom of the stirring tank 110, respectively.

  FIG. 4 is a schematic view showing still another example of the evaporation system of the present invention. In addition, in the evaporation system 300 shown in FIG. 4, the structure which attached | subjected the same reference number as FIG. 1 is the same as that of what was shown in the said drawing.

  The evaporation system 300 of FIG. 4 differs from the system 100 shown in FIG. 1 in that the evaporation device 302 includes a second auxiliary heater 304 for heating the raw material liquid in the stirring tank 110.

  Here, the second auxiliary heater 304 shown in FIG. 4 is provided in the stirring tank 110, and can provide heat obtained from a high-temperature fluid such as steam, a coil heater or the like directly into the stirring tank 110. .

  In the present invention, the second auxiliary heater is a combination of both the one provided on the outer periphery of the stirring tank 110 as shown in FIG. 3 and the one provided inside the stirring tank 110 as shown in FIG. May be used.

  FIG. 5 is a schematic view showing still another example of the evaporation system of the present invention. In addition, in the evaporation system 400 shown in FIG. 5, the structure which attached | subjected the same reference number as FIG. 1 is the same as that of what was shown in the said drawing.

  In the evaporation system 400 of the present invention, the high temperature volatile components obtained from the compressor 120 are heated from another outlet (not shown) (eg, by pressurization) from the compressor outlet 184 through the tube 185 to the tube. It is mixed with the volatile components passing through 403 and fed into the hollow jacket 160 via the jacket inlet 167. Furthermore, in the evaporation system 400 of the present invention, volatile components that are heated (eg, by pressurization) in another device (not shown) and that pass through the tube 403 ′ are passed through the jacket second inlet 167 ′ to form a hollow jacket. 160 may be supplied.

  As described above, in the evaporation system 400 of the present invention, the volatile component of the raw material liquid generated by pressurization by the compressor 120 is added to the volatile component heated by another device, and the combined heat energy is used. The inner wall 111 of the stirring tank 110 can be heated to promote evaporation of volatile components in the raw material liquid sprayed on the inner wall 111.

  For example, the evaporation system 400 shown in FIG. 5 evaporates water from a mixture of non-volatile substances or high-boiling volatile substances and water, or evaporates an evaporant that separates into two liquid phases. Useful for. In another embodiment of the present invention, instead of the evaporation system 400 shown in FIG. 5, the evaporation system shown in FIG. 3 or FIG. 4 is replaced with the reference numeral 403 and / or 403 ′ shown in FIG. A tube may be provided, and a volatile component heated by another device through the tube may be supplied to the hollow jacket.

  FIG. 6 is a schematic view showing still another example of the evaporation system of the present invention. In addition, in the evaporation system 500 shown in FIG. 6, the structure which attached | subjected the same reference number as FIG. 1 is the same as that of what was shown in the said drawing.

  In the evaporation system 500 shown in FIG. 6, the splash preventing device 506 is provided at the upper end of the flow path 176 in the bowl-shaped member 173 constituting the evaporation apparatus 502. By this splash preventing tool 506, the raw material liquid flowing in the flow path 176 from the stirring tank 110 flows down to the inner wall 111 of the stirring tank 110 through the splash preventing tool 506.

  According to the evaporation system 500 shown in FIG. 6, it is possible to reduce the amount of splash generated by the raw material liquid colliding with the inner wall 111 in the stirring tank 110 at the upper end of the bowl-shaped member 173 in the liquid flow direction. Here, in the present specification, “reducing the amount of splash produced when the raw material liquid collides with the inner wall in the stirring tank” means that the raw material liquid pumped up from the bowl-shaped member 173 is the inner wall 111 of the stirring tank 110. When the raw material liquid is sprayed on the inner wall 111, the raw material liquid is prevented from colliding with the inner wall 111 to generate splashes, reducing the substantial amount of splashing diffused into the stirring tank 110, and spreading to the inner wall 111 of the stirring tank 110. In this case, the droplets generated by the collision of the raw material liquid with the inner wall 111 are collected before diffusing into the stirring tank 110, and both the amount of substantial splash diffusing into the stirring tank 110 is reduced. Say it. In the present invention, this can be achieved, for example, by providing the splash preventing device 506 as described above at the upper end of the bowl-shaped member 173 in the flow direction of the raw material liquid.

  A specific example of the splash preventing device 506 shown in FIG. 6 is a mist separator. The splash preventing device 506 is directed toward the inner wall 111 of the agitation tank 110 from the tip of the splash preventing device 506, the raw material liquid pumped from the lower end to the upper end of the saddle member 173 through the flow path 176 of the saddle member 173. Can be sprayed. Here, in the embodiment shown in FIG. 6, the splash preventing device 506 is bent from the axial direction of the hook-shaped member 173 at the joint portion 175 (for example, in a direction substantially parallel to the inner wall 111). The raw material liquid is discharged from the tip of the splash preventing device 506 in a direction substantially parallel to the inner wall 111 (that is, above the stirring tank 110). This discharge is performed when the momentum of the liquid pumped from the bowl-shaped member 173 is weakened after passing through the joint portion 175. As a result, the discharged raw material liquid can be gently supplied from the tip of the splash preventing device 506 toward the inner wall 111 without jumping out upward of the stirring tank 110. Thereby, the violent collision of the raw material liquid colliding with the inner wall 111 is suppressed, and the amount of splash generated by rebounding the inner wall 111 can be reduced.

  In the present embodiment, the “direction substantially parallel to the inner wall 111” means not only the direction in which the axis constituting the flow path 176 is parallel to the plane constituting the inner wall 111 but also the inner wall 111. For example, the case where the surface is inclined within the range of 1 ° to 5 °, preferably within the range of 1 ° to 3 °, is included.

  Furthermore, it is preferable that the splash prevention 506 and the inner wall 111 have an appropriate interval so as not to contact each other. The distance of the closest part between the splash preventing device 506 and the inner wall 111 is, for example, 5 mm to 200 mm. When the distance between the adjacent portions is less than 5 mm, when the rotation shaft is slightly distorted during rotation, the tip of the splash preventing device 506 comes into contact with the inner wall 111, and the inner wall 111 or the splash preventing device 506 itself is removed. There is a risk of damage.

  In addition, although the splash prevention tool 506 demonstrated the example bent with respect to the collar-shaped member 173 in the junction part 175 in FIG. 6, this invention is not limited only to such a form. Instead of the bending, it may be curved at an arbitrary curvature around the joint portion.

  In the present invention, the length of the splash preventing device 506 (the length from the joint portion 175 to the tip portion) is the rotational speed of the rotating shaft 171; the mounting inclination angle θ, the length and the width of the bowl-shaped member 173; Although it is not necessarily limited because it varies depending on various conditions such as viscosity and the like, it is, for example, 10 mm to 200 mm. When a mist separator is used as the splash preventing device 506, a well-known mist separator can be used.

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

100, 200, 300, 400, 500 Evaporation system 102, 202, 302, 402, 502 Evaporator 110 Stirrer tank 111 Inner wall 120 Compressor 150 Receiver 160 Hollow jacket 162 Raw material liquid supply port 166 First auxiliary heater 167 Jacket inlet 168 Jacket outlet 112 Volatile component outlet 117 Reservoir 122 Residual outlet 170 Spattering section 171 Rotating shaft 173 Spear-shaped member 174 Motor 176 Channel 182 Compressor inlet 184 Compressor outlet 204, 304 Second auxiliary heater 506 Splash prevention device

Claims (8)

An evaporation system comprising an evaporation device, a compressor, and a receiver,
The evaporator is
A stirred tank containing the raw material liquid and provided with a volatile component outlet and a residue outlet;
A hollow jacket provided on the outer periphery of the stirring tank and having a jacket inlet and a jacket outlet;
A spraying part that is provided in the stirring tank and flows down the raw material liquid to the inner wall of the stirring tank;
With
here,
The liquid dispersion part of the evaporator is a rotating shaft and a flow path through which the raw material liquid temporarily stored in the stirring tank as the rotating shaft rotates flows from below to above the stirring tank. And at least one hook-shaped member attached to the rotating shaft;
The compressor includes a compressor inlet and a compressor outlet, the volatile component outlet of the evaporator communicates with the compressor inlet via a pipe, and the compressor outlet and the jacket inlet of the evaporator pass via a pipe. And the compressor pressurizes and discharges the volatile components of the raw material liquid supplied from the compressor inlet through the compressor outlet;
The receiver communicates with the jacket outlet of the evaporator via a tube;
system.   The evaporation system according to claim 1, wherein a temperature of a volatile component of the raw material liquid in the hollow jacket is set higher than a temperature of the raw material liquid in the stirring tank.   The said stirring tank is equipped with the raw material liquid supply port for supplying the said raw material liquid, and is equipped with the 1st auxiliary heater for heating this raw material liquid upstream of this raw material liquid supply port. The described evaporation system.   The evaporation system according to any one of claims 1 to 3, wherein the evaporation device includes a second auxiliary heater for heating the raw material liquid in the stirring tank.   The evaporation system according to claim 4, wherein the second auxiliary heater is provided along with the hollow jacket on an outer periphery of the stirring tank.   The evaporation system according to claim 4, wherein the second auxiliary heater is provided in the stirring tank.   7. The jacket according to claim 1, wherein the jacket communicates with a pipe for introducing a volatile component heated by means other than the compressor in addition to the volatile component of the raw material liquid pressurized by the compressor. The described evaporation system.   A splash preventing device is provided at an upper end portion of the flow path in the bowl-shaped member, and the raw material liquid flowing in the flow channel from the stirring tank passes through the splash preventing tool and the inner wall of the stirring tank. The evaporation system according to claim 1, wherein the evaporation system is flowed down to the bottom.

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