JPH0620483B2 - Thin film evaporative concentrator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The disclosed technology is used for obtaining products such as foods, pharmaceuticals and fertilizers.
A highly viscous raw material liquid is supplied from one side, the volatile components are evaporated by the heating action, the stirring blade gives the stirring and mixing action to highly concentrate, and the powdered product can be discharged as a product. Belongs to the field of structural technology.

<Summary of summary> Therefore, the invention of this application, in the process of supplying a highly viscous raw material liquid, concentrating it and discharging it as a product, forms a raw material liquid of the object to be processed in a thin film type and heats it. In addition to this, it is a thin film evaporative concentrator that can be obtained as a product by concentrating to a powder state through a concentrating process by giving a mixing and stirring effect and evaporating, and equipped with a jacket for heat exchange on the outside. At the same time, a shaft is mounted on a cylinder having a supply part for the object to be treated such as a highly viscous raw material liquid on one side and a discharge part for the powder product on the other side, and the shaft has a predetermined number of stages at predetermined intervals in the axial direction. A plurality of stirring blades are provided so as to be swingable in the circumferential direction, and the tip thereof is brought close to the inner surface of the cylinder via a minute clearance, and is an invention relating to a thin-film type evaporative concentration apparatus in which the concentration effect is enhanced. In particular, for the attachment to the shaft, the base of the stirring blade is swingably provided on the blade holder via the pin, and the minute clearance during operation of the stirring blade to the inner surface of the cylinder can be adjusted during assembly, such as adjustment of shims. The invention relates to a thin-film type evaporative concentration apparatus in which a body is interposed.

<Prior Art> As is well known, as the life of citizens is improved, various products are handled in large quantities and in small quantities. Therefore, stable supply of these products is desired, and high precision quality is strongly required. Is starting to appear.

Many of these products are primary products such as agricultural products and marine products, but various products such as secondary processed foods, medicines, and cosmetics are also in circulation.

Among these secondary processed products, for example, there are many products such as candy, cream, and medicine, and there are also jelly-like products, but liquid products such as fruits, vegetable burets, sauces, and soups. There are products, creamy products, and granular resin products and chemicals. The manufacturing process of products with these special properties is preferable in terms of cost and product accuracy. However, there is a demand for easy handling.

In order to deal with this, a reaction apparatus that performs a thermal reaction through physicochemical heat exchange has been developed, adopted, and put into practical use. For example, a boundary film as shown in FIGS. The heat exchange reaction apparatus 1 is provided with a drum type cylinder 3 having a jacket 2 for heat exchange on the outside, and a shaft 8 connected to a motor 7 via bearings 5 and mechanical seals 6 on the front and rear end wall surfaces thereof. Is integrally provided with a shaft 9, and a predetermined number of blades 11, 11 ... Are provided so as to be swingable in the radial direction so that the inner peripheral surface of the cylinder 3 can be slidably rotated in the circumferential direction by its centrifugal force. A predetermined high-viscosity raw material liquid 13 is supplied from the supply port 12 on one side, and a blade
A thin film boundary film is formed between the inner peripheral surface of the cylinder 3 and centrifugal force while mixing and stirring by 11, 11, ... Chemical heat exchange is carried out to cause a thermal reaction as quickly as possible to make it even more viscous, or it is converted into granules by thermal transformation and discharged from the outlet 17 provided on the other side of the cylinder 3.
I was going to take it out as 18.

<Problems to be Solved by the Invention> Incidentally, the conventional film-type heat exchange reaction device 1
Then, the jacket 2 for heat exchange is placed outside the cylinder 3.
Since the unit is provided, rapid heat change depending on the product, for example, switching between high-temperature heat medium and low-temperature heat medium, or heat exchange with a steep heat gradient cannot be performed,
There is a drawback that products with these heat history cannot be obtained,
Also, the rotor is a multi-stage blade 11, 11 ...
Since it slides on the inner peripheral surface of the cylinder, continuous reaction is difficult, and the structure of the rotor inside the cylinder 3 is remarkably complicated, so that the fitting between the plate 11 and the inner peripheral surface of the cylinder 3 is extremely difficult. It is difficult and requires skill and requires complicated work in the initial assembly structure, resulting in high cost and difficulty in maintenance such as maintenance and inspection.

These necks have the disadvantage that the product cost is repelled, and the temperature management control by the jacket 2 is extremely delicate and difficult.

On the other hand, the applicants conducted extensive research and development to develop a thin-film type evaporative concentrator 1'as shown in the ninth, tenth and eleventh aspects, in which a stirring blade 11 'was mounted on the shaft 9 via a blade holder 10'. The stirring blade 11 'is pivotally supported by the pin 22 with respect to the blade holder 10'.
11 'is allowed to swing, and as shown in FIG. 11, its tip is a minute clearance 21, 21' with respect to the inner surface of the cylinder 3.
Is formed so that the object to be processed flowing through the inside of the apparatus 1'in operation is formed in the form of a thin film to improve evaporation and heating action through heating by the jacket 2 and to perform mixing and stirring. It has also become possible to increase the concentration efficiency by effectively providing the action, and to make the product 18 'from the discharge port 17 into a powder state as a result of high concentration.

However, in the seed thin film type evaporative concentrator 1 ', although the problems of the boundary film type concentrator described above are solved,
The following new problems arose. That is, the higher the degree of concentration of the object to be supplied is, of course, the smaller the amount of the residue, the easier the disposal treatment of the residue, and the effective reuse of the solvent, etc. Although effective, such effect is, of course, a thin film concentration efficiency for high concentration, that is, the stirring blade 1 shown in FIG.
It has been found that the formation of the minute clearance 21 between the tip of the 1'and the inner surface of the cylinder 3 as designed is extremely important.

By the way, the thin-film type evaporative concentrator 1'is machined, and since there are many specific parts, errors in manufacturing and assembling each occur, and if the allowable range is exceeded, high concentration as designed can be obtained. There is a problem that it can not be done, and in order to maintain the minute clearance as designed, a high level of skill is required in assembly and maintenance, the manufacturing cost of the device is high and it is difficult to put it into actual operation. Came.

<Object of the invention> The object of the invention of this application is to solve the problems of the basic film-type concentrating device and the like based on the above-mentioned conventional technique and to solve the problems of the basic thin-film evaporating and concentrating device. It is possible to fully utilize the advantages of thin film evaporative concentration, and to obtain a concentrated powder product as designed, thus providing an excellent thin film evaporative concentration device that benefits the field of chemical mechanical equipment in the chemical product manufacturing industry. It is intended to be provided.

<Means and Actions for Solving the Problem> In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned object, has a driving device at the time of producing a thin-film evaporation concentrating device. A chamfer is formed at a predetermined axial position of the shaft integrally extending to the connected rotating shaft, and the blade holder is attached to the chamfer with an adjusting body such as a shim having a predetermined small thickness interposed therebetween. , The stirring blade is swingably supported on the blade holder via a pin, the tip of the stirring blade is formed to form a set minute clearance on the inner surface of the cylinder, and a predetermined object to be processed is supplied from the supply unit, A heat exchange fluid is supplied to the jacket on the outside of the cylinder to allow the object to flow through while exchanging heat, and the object to be processed is rotated by the stirring blade on the inner surface of the cylinder. It is a thin film type and is heated and mixed with stirring to promote evaporation, and is highly concentrated to be a powdered product in the vicinity of the discharge area. Is.

<Embodiment> Next, an embodiment of the present application and invention will be described with reference to FIGS.

In the embodiment shown in FIGS. 1 to 3, reference numeral 10 'is a blade holder for attaching a stirring blade 11' to the shaft 9 so as to be swingable, and to have a predetermined position along the axial direction of a predetermined portion of the shaft 9. A flat chamfer 9'of a size is formed, a seat 10 "at the base of the blade holder 10 'is fastened and fixed by a bolt 23, and a stirring blade 11' is swingably attached via a pin 22. As described above, the minute clearance 21 for high concentration during operation can be formed between the tip of the shaft 3 and the cylinder 3 as designed, and at this time, the chamfer 9'of the shaft 9 is formed. In the invention of this application, there is a possibility that a difference may occur due to the machining of the above and the machining finish of the seat 10 ″ of the blade holder 10 ′ to cause a variation in the minute clearance. In mounting the chamfered portion 9'of the shaft 9 "through the bolt 23, a small clearance 21 as designed can be formed by inserting a shim 24 as an adjusting body therebetween. Has been done.

The shim as the adjusting body may be one as in the embodiment shown in FIG. 3, but several kinds of shims 24 having different thickness sizes are prepared in advance and designed by measurement at the time of assembly. It is needless to say that the plurality of shims 24 ', 24', 24 'having different thicknesses are combined as shown in FIG. Of course, it is possible to select the minute clearance Δh as designed so as to form the minute clearance Δh.
As shown in the figure, a shim having a very small thickness and a shim having a very large thickness may be combined. Further, as in the embodiment shown in FIG. It is possible to optimize the micro clearance 21Δh between the stirring blade 11 'and the inner surface of the cylinder 3 by preparing different ones and selecting the combination of this and the shim 24'. is there.

A shim 24 as such an adjusting body is interposed between the chamfered portion 9'of the shaft 9 and the seat 10 "of the blade holder 10 ', and is tightened by a bolt 23 to attach the pin 22 to the blade holder 10'. The stirring blade 11 'is swingably attached via the above so that the minute clearance 21h between the tip of the stirring blade 11' and the inner surface of the cylinder 3 during operation can be reduced.
Is formed with a minute clearance as designed, and the supply port 12
An object to be treated 23 such as a solvent supplied from the inside is heated by a heating fluid flowing through the discharge port 17 in the concentrating treatment section in the cylinder 3, and is also stirred blades 11 ', 11'. …
Are agitated and mixed with each other, the evaporation action is promoted by the minute clearance 21 between the tip and the inner surface of the cylinder 3, the solution is highly concentrated, and in the final process, it is pulverized and taken out as a product 18 '.

Further, the evaporated portion is discharged from the evaporation port 19 as an evaporated material 20. By doing so, for example, the following table shows experimental data in which the concentration of the waste solvent in the painting process of the automobile as the object to be treated is compared.

As shown in the data of the comparison table, according to the invention of this application, the concentration is relatively improved and the amount of residue is reduced by 200 kg in comparison with the conventional embodiment. There is little odor and there is almost no bad odor, work can be done safely and efficiently, the amount of recovered solvent increases, the cost can be reduced, and since the residue is powdered, it can be sold as a bulking material, for example. In addition to incurring incineration costs for residues that could only be incinerated in the past, profits can be obtained from the sale, which also adds to the cost.

It should be noted that the embodiment of the present invention is not limited to the above-described embodiment, and various embodiments such as forming a shim in a taper shape in the thickness direction can be adopted as the adjusting body.

<Effects of the Invention> As described above, according to the invention of this application, a thin film type evaporation obtained as a product by highly concentrating the object to be treated supplied while exchanging heat to evaporate the solvent component and the like to powder In the concentrator, the formation of a swingable tip micro clearance to the inner surface of the cylinder via the centrifugal force of the stirring blade, which is very importantly involved in pulverization in the high concentration process, attaches the stirring blade to the shaft via the blade holder. By inserting an adjusting body such as a shim in the joining part, it is possible to accurately form a minute clearance during operation with respect to the inner surface of the cylinder of the stirring blade as designed without the need for skill, and by stirring evaporation as designed. The excellent effect is obtained that powdering is achieved through high concentration.

Therefore, the solvent separation efficiency of the workpiece to be supplied is improved and the reuse rate is increased, and the cost can be reduced accordingly, the amount of the residue is reduced, and the powder is reliably pulverized. It is not a residue, so it is not incinerated,
It has the advantages that it can be reused as a bulking material, can even be sold, and that not only the cost required for incineration can be reduced, but even gain can be achieved.

In addition, since the minute clearance on the inner surface of the cylinder due to the swinging rotation of the stirring blade during operation can always be stably obtained, thin film evaporation as designed is performed and highly concentrated powder is obtained, resulting in the conventional viscosity. Unlike high residue,
There is also the advantage that there is no need for incineration, the incineration cost is reduced, and rather, profit is obtained by commercializing it as an extender material and the like, and gaining profit.

Also, by inserting an adjusting body such as a shim between the blade holder and the shaft, not only a very delicate minute clearance can be formed as designed, but also the minute clearance does not fluctuate during operation and is stable. There is also an effect that the thin film type evaporation concentration can be performed.

[Brief description of drawings]

1 to 10 are explanatory views of an embodiment of the invention of this application, FIG. 1 is an enlarged cross-sectional view of one embodiment, FIG. 2 is an enlarged side view of the same, and FIG. 3 is a blade holder and a shaft. FIG. 4 is an enlarged cross-sectional view of another embodiment of the present invention, and FIG. 9 is a vertical cross-sectional view of the entire apparatus.
FIG. 7 is a horizontal cross-sectional view, FIG. 7 is a vertical cross-sectional view of an embodying device based on a conventional technique, FIG. 8 is a horizontal cross-sectional view of the same, and FIG. 11 is a side view of a minute clearance between a stirring blade and an inner surface of a cylinder. 2 …… Jacket, 13 …… Workpiece, 12 …… Supply part, 17 …… Discharge part, 18 ′ …… Product, 3 …… Cylinder, 10 …… Shaft, 11 ′ …… Stirring blade, 1 ′… … Thin film type evaporative concentrator, 21 …… Micro clearance, 14 …… Adjusting body (shim), 10 ′ …… Blade holder, 9 ′ …… Chamfer,

Claims (4)

[Claims] 1. A plurality of agitating blades, each of which has its tip close to the inner surface of the cylinder, are pivotally mounted in a swingable manner on a shaft which is mounted on a cylinder having an outer surface of a jacket and an object supply portion and a product discharge portion. In the thin-film type evaporative concentrator, an adjusting body for adjusting a minute clearance during operation between the stirring blade and the inner surface of the cylinder at the time of assembly is interposed in the joint between the shaft and the stirring blade. Thin film evaporative concentrator. 2. The thin-film type evaporative concentrator according to claim 1, wherein the adjusting body is a shim. 3. The thin-film type evaporative concentrator according to claim 2, wherein the shim is interposed between the shaft and the blade holder. 4. A thin-film type evaporative concentrator according to claim 3, wherein a chamfer is formed on the blade holder mounting portion of the shaft.