JPH02233103A - Thin membrane type evaporative concentration apparatus - Google Patents

Abstract

PURPOSE:To accurately form a fine clearance without requiring skill by mounting an adjustment body, which adjusts the fine clearance during operation between a stirring blade and a cylinder at the time of assembling, to the mount part of the cylinder and the stirring blade. CONSTITUTION:A plurality of stirring blades 11' whose leading ends are close to the inner surface of a cylinder 3 are pivotally provided to the shaft 9, which has a jacket 2 mounted therearound and is mounted to the cylinder 3 having a supply part 12 of a material 13 to be treated and a discharge part 17 of a product 18, in the axial direction thereof in a freely swingable manner. An adjustment body 24 for adjusting the fine clearance during operation between the stirring blades 11' and the inner surface of the cylinder 3 is mounted to the mount part 9' of the shaft 9 and the stirring blades 11'. As a result, the fine clearance during the operation of the stirring blades to the inner surface of the cylinder can be accurately formed according to a plan without requiring experienced skill and powdering can be achieved through high concn. due to stirring evaporation according to a plan.

Description

[Detailed Description of the Invention] Industrial Application Fields The disclosed technology is applicable to obtaining products such as foods, medicines, fertilizers, etc.
This equipment is capable of supplying a highly viscous raw material liquid from one side, evaporating the volatile matter through heating action, giving a stirring and mixing action using a stirring blade to highly concentrate, powdering, and discharging as a product. Belongs to the structural technology field.

<Summary> The invention of this application is a process in which a highly viscous raw material liquid is supplied, concentrated, and discharged as a product, in which the raw material liquid of the object to be processed is formed into a thin film and subjected to a heating reaction. It is a thin film type evaporation concentrator that can obtain a product by applying a mixing and stirring action in addition to the evaporation process and concentrating it to a powder state through a concentration process, and is equipped with a jacket for heat exchange on the outside. At the same time, a shaft is mounted on a cylinder that has a supply section for a processed material such as a highly viscous raw material liquid on one side and a discharge section for a powdered product on the other side, and the shaft has a predetermined number of stages arranged at predetermined intervals in the axial direction. This invention relates to a thin film type evaporation concentrator in which a plurality of stirring blades are provided so as to be able to freely swing in the circumferential direction, and the tips thereof are brought close to the inner surface of a cylinder through a minute clearance to enhance the concentration effect, and in particular, The shaft is connected to the base of the stirring blade via a pin so that it can swing freely to the blade holder, and an adjustment body such as a shim is used to adjust the minute clearance of the stirring blade to the inner surface of the cylinder during operation during assembly. This invention relates to a thin film type evaporative concentration VcM in which a is interposed.

<Prior art> As is well known, as people's lives improve, various products are handled in large quantities and small quantities.Therefore, a stable supply of these products is desired, and high-precision quality is also strongly required. It's starting to look like this.

Many of these products include primary products such as agricultural products and marine products, but a variety of secondary processed products such as foods, medicines, and cosmetics are also distributed.

Among these secondary processed products, there are many products such as candies, creams, and medicines, and some of these products are in the form of jelly, but there are also liquid products such as fruits, vegetable purees, sauces, and soups. There are also products in the form of creams, resin products in the form of granules, chemicals, etc. The manufacturing process for these products with special properties is preferably reduced in man-hours in terms of cost and product accuracy. There is a desire for easy handling and less waste.

To deal with this, reaction devices that perform thermal reactions through physicochemical heat exchange have been developed, adopted, and put into practical use. The heat exchange reactor 1 is equipped with a drum-type cylinder 3 having a heat exchange jacket 2 on the outside, bearings 5 on the front and rear end walls, and a shaft 8 connected to a motor 7 via a mechanical seal 6. A shaft 9 is integrally provided, and a predetermined number of blades 11, 11, . A predetermined high-viscosity raw material liquid 13 is supplied through the supply port 12 on one side of the cylinder 3, and while being mixed and crushed by the blades 11, 11, etc., a thin film is formed between it and the inner peripheral surface of the cylinder 3 through the centrifugal force. The high temperature heat medium 1 is applied to the jacket 2 by forming a film of
5 is supplied from the supply port 14 and subjected to physicochemical heat exchange to carry out a thermal reaction as soon as possible to make it even more viscous, or to change it into granules through thermal transformation and transfer it to the other side of the cylinder 3. The product 18 was taken out from a discharge port 17 provided.

<Problem to be solved by the invention> While cutting, the membrane heat exchange reactor 1 of the conventional mode
In this case, the jacket 2 for heat exchange is placed on the outside of the cylinder 3.
Because the unit is installed, rapid heat changes depending on the product, such as switching between high-temperature heat medium and low-temperature heat medium, or heat exchange with a sudden thermal gradient, are not possible.
There is a drawback that products with these thermal histories cannot be obtained,
In addition, since the rotor slides against the inner circumferential surface of the cylinder 3 using multiple stages of blades 11, 11, etc., there is a problem in that it is difficult to perform a continuous reaction. The structure is extremely complicated, with plate 11 and cylinder 3.
It is extremely difficult to connect to the inner circumferential surface, requires great skill, and requires complicated work during initial assembly and manufacturing.
As a result, the cost is high, and maintenance such as maintenance, inspection, etc. is difficult, resulting in poor serviceability.

These bottlenecks have the disadvantage of increasing product costs, and the temperature control by the jacket 2 is extremely delicate and difficult.

In response to this, the applicant and others have carried out intensive research and development, and have developed a thin film type evaporation concentrator 1' as shown in Nos. 9, 10, and 11. Attach the stirring blade 11'
is pivoted to the blade holder 10' by a pin 22,
The stirring blade 11' is made swingable so that its tip can form minute clearances 21, 21' with the inner surface of the cylinder 3, as shown in FIG. The material to be processed is formed into a thin film to improve the evaporation and heating effect through heating by the jacket 2, and the mixing and stirring effect is also effectively imparted to improve the concentration efficiency. The product 18' from the outlet 17 can now be made into a powder as a result of high concentration.

However, although the nuclide thin film type evaporative concentrator 1' solves the problems of the film type concentrator described above, the following new problems have arisen.

In other words, the higher the degree of concentration of the supplied material to be treated, the less the amount of leftover residue, which makes it easier to dispose of the leftover waste, and promotes the effective reuse of solvents, etc. Naturally, this effect is due to the concentration efficiency of the thin film type that achieves high concentration, that is, the formation of the minute clearance 21 between the tip of the stirring blade 11' and the inner surface of the cylinder 3 as shown in FIG. 11 as designed. It has become clear that the world plays an extremely important role.

However, since the thin film evaporation concentrator 1' is machined and has many specific parts, errors may occur during manufacture and assembly of each part, and if the tolerance is exceeded, it may not be possible to achieve the high concentration as designed. In addition, maintaining the minute clearance as designed requires a high degree of skill in assembly and maintenance, resulting in the inconvenience of high production costs and difficulty in actual operation. It's here.

<Purpose of the Invention> The purpose of the invention of this application is to solve the technical problem of a basic thin film type evaporation concentrator that overcomes the problems of the film type concentrator etc. based on the above-mentioned prior art. We have developed an excellent thin-film evaporative concentrator that can fully utilize the advantages of conventional thin-film evaporative concentrators and obtain concentrated powder products as designed, thereby benefiting the application of chemical and mechanical equipment in the chemical manufacturing industry. This is what we intend to provide.

In order to solve the above-mentioned problems, the structure of the present invention, which is based on the above-mentioned object and the gist of the above-mentioned patent claims, is to solve the above-mentioned problems. A chamfered portion is formed at a predetermined axial portion of the shaft that is extended from the connected rotating shaft, and the blade holder is attached to the chamfered portion by interposing an adjusting body such as a shim with a predetermined minute thickness. A stirring blade is swingably supported on the blade holder via a bottle, the tip of the stirring blade is made to form a set minute clearance on the inner surface of the cylinder, and a predetermined material to be processed is supplied from the supply section, and the cylinder is moved into the cylinder. When a heat exchange fluid is supplied to the outer jacket of the cylinder and the material to be processed is passed through while exchanging heat, the material to be processed is flowed in a thin film form on the inner surface of the cylinder by a stirring blade rotating on the inner surface of the cylinder. Technical measures have been taken to promote evaporation by heating, mixing, and stirring, and to achieve high concentration so that the powdered product is discarded near the discharge section.

<Example> Next, an example of the invention of this application will be described below based on FIGS. 1 to 6.

In the embodiment shown in FIGS. 1 to 3, reference numeral 10' denotes a blade holder, which attaches the stirring blade 11' to the shaft 9 in a freely swingable manner, and mounts the stirring blade 11' along the axial direction of a predetermined portion of the shaft 9. Flat chamfered portion 9 of predetermined size
' is formed, and the seat 10' at the base of the blade holder 10' is fastened and fixed with a bolt 23, and the agitating blade 11' is swingably attached via a bottle 22, and its tip is connected to the cylinder 3. In the meantime, as mentioned above,
The micro clearance 21 for high concentration during operation is Δh
However, by machining the chamfer 9' of the shaft 9,
Furthermore, since there is a possibility that the machining finish of the seat 10' of the blade holder 10' may vary, resulting in slight variations in the clearance, in the invention of this application, the seat 10'
When the chamfered portion 9' of the shaft 9 is attached to the chamfered portion 9' of the shaft 9 via the bolt 23, a shim 2 is inserted between the two as an adjusting body.
4 is inserted, the minute clearance 21 as designed is Δh
It is roughened so that it can be formed.

Incidentally, the shim serving as the adjusting body may be one piece as in the embodiment shown in FIG. Of course, it is necessary to select and use shims so that the minute clearance 21Δh as designed is not formed, but as shown in FIG. Of course, it is possible to form a minute clearance Δh according to the optimal design by combining a thin shim with a very thick shim as shown in Fig. 5. Furthermore, as in the embodiment shown in FIG. 6, the seat 10' of the blade holder 10' may have different thicknesses, and by selecting a combination of this and the shim 24', the agitating blade 11'
Minute clearance 21Δ between and the inner surface of cylinder 3
It is possible to try to make h optimal.

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 the bolt 23 is tightened to attach the pin 22 to the blade holder 10'. By attaching the agitating blade 11' so that it can swing freely through the agitator blade 11', the minute clearance 21 Δh between the tip of the agitating blade 11' and the inner surface of the cylinder 3 during operation is formed to the designed minute clearance, and the supply port is closed. The material to be treated 23 such as a solvent supplied from the cylinder 3 is discharged from the discharge port 1 in the concentration processing section in the cylinder 3.
7 is heated by the heating fluid flowing through it,
In addition, the stirring blades 11', 11', etc. stir and mix the mixture, and the minute clearance 21 between the tip and the inner surface of the cylinder 3 promotes evaporation, resulting in highly concentrated scum, and in the final process, the product is powdered. 18'.

Further, the evaporated matter is discharged from the evaporation port 19 as evaporated matter 20. In this way, for example, the following table shows experimental data comparing the concentration of waste solvents used in the painting process of automobiles as objects to be treated.

Comparison Table of High Concentration of Waste Solvents As shown in the data in the comparison table, compared to the conventional embodiment, according to the invention of this application, when the processing capacity is at this level, the degree of concentration is relatively improved, and the amount of residue is reduced. 200 kg is reduced, there are fewer workers and there is almost no odor, work can be carried out safely and efficiently, more solvent is collected, costs can be reduced, and since the residue is powdered, for example,
It can be sold as bulking material, and even for residues that could only be incinerated in the past, instead of incurring incineration costs, it can be seen that profits from the sale can be made, which is beneficial in terms of costs.

The fruit of this invention! It goes without saying that the mode is not limited to the above-mentioned embodiment, and various modes can be adopted, such as forming a shim into a tapered shape in the thickness direction as the adjusting body.

Effects of the Invention> As described above, according to the invention of this application, the supplied material is highly concentrated while exchanging heat, and the solvent etc. are evaporated and powdered to obtain a product by thin film evaporation. In a concentrator, the formation of a minute clearance at the tip of the stirring blade, which can swing freely against the inner surface of the cylinder through the centrifugal force of the stirring blade, which is extremely important for powderization in the high concentration process, moves the stirring blade to the shaft 1 through the blade holder. By interposing an adjustment body such as a shim in the fitting part to be assembled, it is possible to accurately form the minute clearance between the stirring blade and the inner surface of the cylinder during operation as designed, without requiring any skill, and to achieve stirring as designed. The excellent effect of obtaining powder through high concentration through evaporation is achieved.

Therefore, the solvent separation efficiency of the supplied material to be processed is high, and the rate of recovery and reuse is high, leading to cost reductions. It is not a residue, so it is not incinerated, etc.
It has the advantage that it can be reused as bulking material, etc., or even made into a commercial product, which not only reduces the cost of incineration but also increases the profit by 1q.

In addition, because the minute clearance on the inner surface of the cylinder due to the freely swingable rotation of the stirring blade during operation is always stably obtained, thin-film evaporation is performed as designed, and 1q of highly compressed powder is produced compared to the conventional method. Unlike highly viscous residue, there is no need for incineration, reducing incineration costs;
There is also the advantage that profits can be generated by commercializing it as a bulking material or the like.

In addition, by interposing an adjustment body such as a shim between the blade holder and the shaft, not only can extremely delicate micro-clearances be formed as designed, but also the micro-clearances do not fluctuate during operation, making it stable. Another advantage is that thin-film evaporation concentration can be performed.

[Brief explanation of the drawing]

1 to 10 are explanatory diagrams of embodiments of the invention of this application, in which FIG. 1 is an enlarged cross-sectional view of one embodiment, FIG. 2 is an enlarged side view of the same part, and FIG. 3 is a blade holder and shaft. Figures 4, 5, and 6 are enlarged sectional views corresponding to Figure 3 of other embodiments, Figure 9 is a longitudinal sectional view of the entire device, and Figure 10 is an enlarged sectional view of the joint part.
7 is a longitudinal sectional view of the implementation device based on the prior art, FIG. 8 is a lateral sectional view of the same, and FIG. 11 is a side view of the minute clearance between the stirring blade and the inside of the cylinder. Figure 3 Figure 4 2...Jacket, 13...Workpiece, 12.
... Supply section, 17... Discharge section, 18'... Product, 3... Cylinder, 10... Shaft,
11'... Stirring blade, 1'... Thin film evaporation concentrator, 21... Minute clearance, 14... Regulator (shim), 10'... Blade holder, 9'... Chamfering Section, Figure 5

Claims (4)

[Claims] (1) A thin film in which a plurality of stirring blades, each having a tip close to the inner surface of the cylinder, are swingably pivoted in the axial direction on a shaft that is equipped with a jacket and is attached to a cylinder that has a processing material supply section and a product discharge section. In the type evaporation concentrator, an adjustment body is installed at the joint between the shaft and the stirring blade to adjust a minute clearance during operation between the stirring blade and the inner surface of the cylinder during assembly. Thin film evaporation concentration equipment. (2) The thin film evaporation concentration device according to claim 1, wherein the regulator is a shim. (3) The thin film type evaporation concentration device according to claim 2, wherein the shim is interposed between the shaft and the blade holder. (4) The thin film evaporation concentration device according to claim 3, wherein a chamfer is formed on the blade holder attachment portion of the shaft.