JPS62225201A - Centrifugal evaporator - Google Patents

Abstract

PURPOSE:To eliminate leakage and the mixing of foreign matter into a material to be treated by forming the rotating shaft part of a rotor contained in the vacuum vessel of the titled centrifugal evaporator with a magnetic levitation type rotary introducing device, and rotating the rotor without contact to simplify a vacuum sealing mechanism. CONSTITUTION:The front wall part 1a and the rear wall part 1b are joined through an O ring 2 to form the vacuum vessel 1. The rear wall part 1b consisting of a light transmitting material, and is formed integrally with a casing 3. A rotor 4 is arranged in he vessel, and rotated by the magnetic levitation type rotary introducing device 5 extending through the casing 3 without contact with the vacuum vessel. Since one end of the magnetic device is supported by a flange 7 fixed to the rear end part of the casing 3 through an O ring 6, the vessel is hermetically sealed. The rotor 4 transmits the light injected through the light transmitting part of the rear wall part 1b, and the raw liq. is heated and evaporated by the light.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention provides a rotor provided with an evaporation surface for receiving an undiluted solution to be treated in a vacuum container and rotatably driven from the outside. This invention relates to a centrifugal evaporator that supplies a stock solution to be treated and performs 715 necessary treatments such as distillation, concentration, deaeration, dehydration, deoxidation, and deodorization.

[Conventional technology] Conventionally, this type of centrifugal evaporator uses a heating medium conduction heating method in which heat is applied to the evaporation surface of the rotor by introducing a heating medium from outside the vacuum container along the rotating tank of the rotor. A radiation heating method using a heating resistor is usually used, in which a heater is provided on the back side of the evaporation surface of the rotor, and the evaporation surface is heated by energizing the heater.

In any of these types of centrifugal evaporators, the rotor placed inside the vacuum container is extended from the outside of the vacuum container to the rotor inside through the wall of the vacuum container by a drive motor installed outside the vacuum container. The container is configured to be rotated at a required speed via a rotating tank rotatably supported by bearings within the container.

For example, to explain an example of a conventional centrifugal evaporator that uses a radiation heating method using a heating resistor, as shown in Figure 2 of the attached drawings, it is connected to a vacuum pump (not shown) to create a vacuum inside. A rotor B is disposed within the vacuum vessel Δ which can be maintained, and this rotor 8 is rotationally driven by a drive motor (not shown) via a rotating tank C extending to the outside of the vacuum vessel A. The stock solution to be processed is supplied to the evaporation surface of the rotor B, and as the rotor B rotates, the supplied stock solution to be processed flows on the evaporation surface in the form of a thin, uniform film. A heater E is provided on the back side of the evaporation surface of the rotor B, and is configured to heat the evaporation surface of the rotor B by energizing the heater E. For example, in a distillation operation, the substance distilled on the evaporation surface of rotor B condenses on the wall of vacuum vessel A, flows along the wall, collects in trap F, and is collected through fraction collection port G. Also, concentration, deaeration, dehydration, 12
In acid and deodorization operations, the raw solution is concentrated, deaerated, dehydrated, deoxidized, and deodorized on the evaporation surface of rotor B, and then passed through the treated liquid recovery port H.
collected through.

[Problems to be Solved by the Invention] As described above, in conventional centrifugal evaporators, the rotor is rotated by driving the rotor from outside the vacuum container through a rotating tank that extends through the wall of the vacuum container. Moreover, not only is the vacuum sealing mechanism complicated, but leakage is likely to occur from the sealed portion of the rotating tank. Furthermore, since the rotary tank is in mechanical contact with the bearing portion, there is a risk that 5'/R oil molecules and dust generated by frictional contact may be mixed into the object to be treated.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to rotate a rotor in a non-contact manner from the outside of a vacuum container in order to solve the above-mentioned drawbacks and problems associated with the rotation introducing means included in the conventional centrifugal evaporator. An object of the present invention is to provide a centrifugal evaporator that can be driven.

Means for Solving Problem L] In order to achieve the above object, in the centrifugal evaporator according to the present invention, the rotating tank portion of the rotor housed in a vacuum container is configured with a magnetic levitation type rotation introduction device. Ru.

[Function] In the centrifugal evaporator according to the present invention configured as described above, the rotor placed in the vacuum container can be rotated in a non-contact state by the drive motor provided outside the vacuum container, thereby achieving vacuum sealing. The mechanism can be simplified, and clean evaporation can be performed without worrying about leakage or contamination of the object to be treated.

[Example] Hereinafter, an example of the present invention will be described with reference to FIG. 1 of the accompanying drawings.

FIG. 1 shows an embodiment of a centrifugal evaporator according to the present invention, in which 1 is a vacuum container, which has a structure in which a front wall portion 1a and a rear wall portion 1b are joined via an O-ring 2.
The rear wall portion 1b is made of a light-transmissive material, such as quartz glass, and is formed integrally with a casing 3 extending in the axial direction. A rotor 4 is disposed within the vacuum vessel 1, and this rotor 4 has an evaporation surface 4a, and is rotated at, for example, about 300 rpm+ without contacting the vacuum vessel 1 by a magnetically levitated rotation introduction device 5 extending through the casing 3. rotated at speed. One end of the magnetically levitated rotation introduction device 5 is supported by a flange 7 attached to the hanging end of the casing 3 via an O-ring 6, thereby keeping the inside of the vacuum container 1 in a sealed state. The rotor 4 is a rear wall portion 1b of the vacuum vessel 1.
A material that can transmit or absorb light that enters through a light-transmitting portion (an example of a light-transmitting material is quartz glass).

As shown in the figure, the vacuum container 1 is provided with a stock solution supply port 8 to be processed in its upper wall portion, and a stock solution supply pipe 9 extends from the stock solution supply port 8 toward the center of the evaporation surface 4a of the rotor 4. . Further, a first fraction recovery port 10 and a stock solution recovery port 11 are provided in the lower wall portion of the vacuum container 1 . Further, a stop plate 12 for preventing scattering of the undiluted solution is arranged adjacent to and surrounding the peripheral edge of the evaporation surface 4a of the rotor 4, and the undiluted solution received by the stop plate 12 is collected at a undiluted solution recovery port at the lower part of the stop plate 12. The raw solution is allowed to flow to the stock solution recovery port 11 through a hole 12a provided corresponding to the stock solution recovery port 11.

A second fraction recovery port 13 is provided in the lower wall portion of the front wall portion 1a of the vacuum vessel 1, and a water cooling jacket 14 is provided to condense the 91 fraction evaporated by heating over almost the entire area of the front wall portion 1a. It is installed internally.

In addition, in the rear wall portion 1b of the vacuum vessel 1, the fraction evaporated by heating is condensed at positions opposite to the center and the periphery of the evaporation surface 4a of the rotor 4, respectively. Water cooling jackets 15, 16 are provided to prevent the upper rotary introduction device 5 from getting around and contaminating it.

A heating lamp 1 is provided on the outside of the rear wall portion 1b of the vacuum container 1.
7 is provided, and the heating lamp 11 is made of a light source (for example, a halogen lamp), and is equipped with a reflecting mirror 18 so that the light is efficiently incident on the rotor 4 in the vacuum container 1. There is.

In the operation shown in FIG. 5 and shown in FIG.
After evacuating to the required degree of vacuum, the stock solution to be processed passes from the stock solution supply port 8 through the stock solution supply pipe 9 and is rotated by an external drive motor (not shown) via the magnetic levitation type rotation introduction device 5. It is supplied to the center of the evaporation surface 4a of the rotor 4. The supplied stock solution spreads over the entire evaporation surface 4a of the rotor 4 with a uniform film thickness due to the action of centrifugal force. In this way, the stock solution that has spread over the entire area of the evaporation surface 4a of the rotor 4 is evaporated by absorbing the light transmitted from the heating lamp 1γ through the vacuum vessel 1 and the rotor 4, or by the evaporation of the rotor 4 that has absorbed the heat generated by the light. It is heated by surface 4a. The heating temperature of the stock solution at this time can be easily adjusted by controlling the amount and wavelength of light depending on the type of stock solution.

The fraction evaporated by heating is condensed on the front wall portion 1a of the vacuum volume Pli1 located opposite the evaporation surface 4a of the rotor 4, and is collected from the second fraction recovery port 13 through the front wall portion 1a. Ru. The fraction condensed in a portion other than the front wall portion 1a of the vacuum container 1 is recovered from the first fraction recovery port 10. Further, the stock solution received by the stop plate 12 passes through the hole 12a and is collected from the stock solution recovery port 11.

Although the illustrated embodiment has described an apparatus that heats and evaporates the object to be processed using external light, the present invention is equally applicable to a centrifugal evaporator of Haku's type as shown in FIG. is recognized.

[Effects of the Invention 1] As explained above, in the centrifugal evaporator according to the present invention, the rotating tank portion of the rotor housed in the vacuum container is configured with a magnetic levitation type rotation introducing device, so that it is different from the conventional device. This eliminates the need for a complicated vacuum sealing mechanism, which not only simplifies the configuration of the apparatus, but also prevents leakage and contamination of the object to be processed, allowing for clean processing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic sectional view showing an embodiment of a centrifugal evaporator according to the present invention, and FIG. 2 is a schematic sectional view showing a conventional centrifugal evaporator. In the figure, 1: Vacuum vessel, 1a: Front wall section, 1b: Back wall section, 2: 0 ring, 3: Casing, 4: Rotor, 4a: Evaporation surface, 5: 1itl air floating rotation introduction device, 6:0 Ring, 7: Flange, 8: Stock solution supply port, 9: Stock solution supply pipe, 10: First fraction collection port, 11: Stock solution collection port, 12: Stop plate, 12a: Hole, 1 13: Distillate collection port , 14: Water cooling jacket, 15: Water cooling jacket, 16: Water cooling jacket, 17: Heating lamp, 18: Reflector.

Claims (1)

[Claims] A rotor with an evaporation surface that receives the stock solution to be processed is arranged in a vacuum container, and the stock solution to be processed is supplied to the evaporation surface of the rotor to perform distillation, concentration, deaeration, dehydration, deoxidation, deodorization, etc. A centrifugal evaporator for performing necessary processing, characterized in that a rotating tank portion of the rotor housed in the vacuum container is constituted by a magnetic levitation type rotation introducing device.