JPS62298401A - Method for heating and concentrating solution - Google Patents

Abstract

PURPOSE:To prevent the frothing of a solvent by horizontally providing plural cylindrical bodies at the heat-transfer part at the bottom of a heating vessel for a food soln., and allowing the soln. at the bottom to enter the cylindrical body from one end and leave the body from the other end to form a convection current. CONSTITUTION:The cylindrical bodies 2 are horizontally placed at the heat- transfer part at the bottom of the heating vessel 1, and the soln. 3 is charged into the vessel and heated. At this time, the surface tension is locally changed by the solute in the soln., and bubbles 4 are formed. In this case, the bubbles 4 enter the cylindrical body 2 from one end inlet, leave the body from the other end, then ascend toward the soln. surface, and collapse during ascension. Consequently, frothing is not caused, and the rising of the soln. and the boiling over the soln. to the lower part can be prevented.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention <Object of the Invention> Industrial Application Field The present invention relates to a method for heating and concentrating a solution, and more specifically, a method for heating and concentrating an edible solution that generates a large number of bubbles. It relates to a method that can heat and concentrate a solution without causing any

In the specification, we will mainly explain solutions used in the food industry, but even in solutions in other fields, substances generally dissolve in the solvent and cause a so-called foaming phenomenon when concentrated by heating. Contains all solutions produced.

BACKGROUND OF THE INVENTION Conventionally, in the food processing industry, boiled squid and other liquids have been concentrated by heating.

Since bubbling occurs during this heating and concentration process, a closed pot is generally used, and the solution is poured into the pot and heated from the bottom to evaporate and remove liquid components such as water. The foaming phenomenon in the mouth is a unique phenomenon that occurs only when substance '11 is dissolved in a solvent, and does not occur in water or pure liquid, and the cause is not clear.

However, in general, if a substance that causes a change in surface tension or a substance that stabilizes bubbles is generated in a solution, foaming tends to occur, and in particular, when foaming occurs, the solution flows out of the heating container due to foaming. l111i1 becomes difficult.

For these reasons, a heating concentrator that combines a heat exchanger and an evaporation tower is used to heat and concentrate solutions that are prone to foaming, without using a heating container such as a pot. Foaming is prevented and concentrated by spraying a heated solution heated in a heat exchanger. This heating concentrator has a high equipment cost and is suitable for continuously processing a large amount of solution, but is not suitable for heating and concentrating a small amount of solution when necessary.

For this reason, when concentrating a small amount of solution by heating, it is sometimes done by applying vibration to a heating container such as a pot to destroy the bubbles, or by adding an antifoaming agent to suppress the bubbles. ,
Such a heating concentration method is unsuitable for actual processing.

In addition, in the seafood industry, although there are a large amount of solutions that can recover high-quality flavor components by processing them quickly while maintaining freshness, as mentioned above, the equipment cost is low,
Since no heat concentration method has been established that is easy to handle and allows for efficient ala in a pot or the like, it is not possible to perform 9all each time. For this reason, the fish must be stocked until it is suitable for human processing, resulting in a loss of freshness and making it unedible, and in many cases, the fish is forced to become fish soluble and be used as feed.

Problems to be Solved by the Invention The present invention aims to solve these problems, and specifically, it is possible to easily prevent foaming and heat a solution even in a heating container such as an open pot or a vacuum pot. The purpose of the present invention is to propose a concentration method that enables condensation, allows use of an ordinary pot as a heating container, and allows processing regardless of the amount of solution.

<Structure of the Invention> Means for solving the problem and its operation, that is, the method of the present invention includes horizontally applying a plurality of cylindrical bodies such as vibrators to the bottom heat transfer part of a boiler heat container such as a pot, The bottom heat transfer section is characterized by heating and concentrating the solution while forming a solution flow that enters from one end of these cylindrical bodies, exits from the other end, and rises to the solution surface.

The configuration of these means and their functions will be explained below with reference to the drawings.

First, FIG. 1 is an explanatory diagram for concentrating a solution in an open pot according to the method of the present invention, and reference numeral 1 indicates a heating container such as an open pot. A cylindrical body 2 such as a pipe is placed horizontally in the heat transfer section at the bottom of the heating container 1, and a solution 3 is put into the heating container 1 and heated from the bottom. The solute is dissolved in the solution 3 as described above, and the solution is heated from the point in contact with the inner wall surface of the bottom of the heating container 1 by the amount of heat given from the bottom of the heating container 1, and the solute is dissolved in the solution 3. As a result, the surface tension changes locally, and the sluice 4 is generated and heated.

At this time, these bubbles 4 do not rise as they are, but sequentially enter from the entrance at one end of the gutter-like body 2, pass through it, and are discharged from the other end. The bubbles 4 are destroyed during the path, especially during the rise, and the so-called bubbling phenomenon does not occur as in the conventional example.

In other words, as is generally known, when the heating temperature is increased, some of the solutes in the solution may lose their solubility and precipitate, or foaming may occur due to changes in surface tension due to the solute, stabilization of bubbles, etc. Due to this bubbling phenomenon, the solution rises and spills out of the heating container, preventing smooth concentration. On the other hand, according to the method of the present invention, since the cylindrical body 2 such as a pipe is placed horizontally at the bottom of the heating container 1, the heated solution flows inside the cylindrical body 2, and in particular,
This cylindrical body 2 forms a flow path. This channel has a uniform cross-sectional area, and while the solution at the inlet is heated, the temperature of the solution at the outlet is low, and the solution passes through the channel made of the cylindrical body 2 at an accelerated rate. The pressure inside the cylindrical body 2 is slightly lower than that outside.

Because of the opening, the bubbles 4 generated on the heat transfer surface of the heating container 1 are sequentially sucked into the cylindrical body 2 along with the solution, and are discharged from the other end at a slightly lower pressure with a certain flow velocity and rise. . However, during this rise, the pressure of the bubble 4 is lower than the pressure of the solution around the periphery, and this pressure difference causes the bubble 4 to push
- and disappears, and no foaming phenomenon occurs.

Furthermore, when forming a flow path as described above by placing a large number of cylindrical bodies 2 such as vibrators at the bottom of the heating container 1, the cylindrical bodies 2 can be moved in any way as long as they are placed horizontally. As shown in FIG. 2, it is preferable that the bubbles 4 can be placed in a radial shape. If the bubbles 4 are in a radial shape, the bubbles 4 in the center of the heating container 1 will enter the cylindrical body 2 and reach the side wall, and will flow along the side wall. In other words, in FIG. 2, a large number of cylindrical bodies 2 are welded radially on the circumference of an annular metal ring 50, and according to the volume of the solution to be concentrated, the bubbles 4 disappear. At least one layer is stacked horizontally on the bottom of the heating container 2. When placed in this way, a flow path can be formed by the cylindrical body 2 of each layer as described above, and the foaming phenomenon can be extremely effectively prevented. In addition, since the cylindrical body 2 is integrated with the ring 5, it can be easily taken out and washed after concentration, and is suitable for stacking the cylindrical bodies 2 in layers. However, any material that can form a horizontal flow path to some extent can be used.

The ring 5 and the cylindrical body 2 are made of corrosion-resistant and heat-resistant materials, and in the case of food, it is necessary to avoid toxic materials.Also, they can be made of ceramics, etc. .

It is necessary to take impact resistance into consideration when selecting.

Examples Example 1゜ Ordinary open double boiler (rice boiler, diameter 65C1l 1
Boiled squid liquid (4% on a sugar meter) was added to the mixture, and the mixture was boiled to concentrate. At this time, in order to suppress outflow due to foaming, heating was performed gradually over a long period of time, and it took 6 hours to concentrate the water content to 60%. On the other hand, under similar conditions, as shown in FIG.
Ring 5 of the stainless steel rod of I has a diameter of 2aa and a length of 5C1.
25 stainless steel pipes 2 are welded in a radial pattern.
The set was heated at the bottom of a rice boiler so that pipe 2 was horizontal. At this time, as it heats, the bubbles rise through the pipe, and during this rise, the bubbles disappear as they rise, preventing foam from flowing out even if natural convection occurs, and rapidly The water content could be concentrated to GO% in 1.5 hours.

Example 2゜ Squid boiling liquid 2001 (in volume 3 (ioZ))
The solution was concentrated for 1 hour while preventing outflow due to foaming (68° C. vacuum gauge pressure 5 GOmw+Hg was the limit), but the evaporation m was 141/h.

Under the same conditions, 4 sets of 25 stainless steel pipes 2 with a diameter of 2 ci and a length of 5 cm were welded radially into a ring 5 of a stainless steel rod with a diameter of 308111, and the pipes were placed horizontally. The boiled squid liquid is 8
It boiled vigorously without foaming or flowing out at 0℃ and vacuum gauge pressure of 400 min. and 11 g, and after 3.5 hours, 5 liters of water with 60% moisture was boiled.
ll! Evaporation exhaustion 521/h to obtain liquid ii 151). In addition, no scratches were observed on the heat transfer portion of the can body.

<Effects of the Invention> As explained in detail above, the method of the present invention involves placing at least a small number of cylindrical materials such as pipes horizontally in the bottom heat transfer part of a heating container such as a pot, and The method is characterized in that the solution is heated and concentrated while forming a solution flow that enters the tubular material from one end and exits from the other end and rises to the solution surface in the hot section.

Therefore, according to the method of the present invention, an open pot or a vacuum double pot with the simplest structure can be used, so even a very small-scale food manufacturer can easily use the method.

In addition, even marine products that tend to lose their freshness can be processed in small quantities while maintaining high freshness, so their concentrates can be effectively used as concentrated soups or natural extracts. Furthermore, in the case of a concentrating column, highly viscous concentrate tends to clog, but this method does not cause such concerns.

In addition, in the above embodiment, the cylindrical body such as a pipe has at least two parts.
Although an example was shown in which N was used, the above effect can be achieved in the method of the present invention even when only one hole is provided.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an example of carrying out the method of the present invention, Fig.
The figure is a plan view of an example of a cylindrical body such as a pipe used in this case. Code 1... Heating container 2... Cylindrical body 3... Solution 4... Bubbles 5.
...Ring Patent Applicant Hatchiti Co., Ltd. Patent Attorney Yoshikatsu Matsushita Fumi Soejima Figure 41 @ Figure 2

Claims (1)

[Claims] A plurality of cylindrical bodies such as pipes are placed horizontally in the bottom heat transfer section of a heating container such as a pot, and in this bottom heat transfer section, the solution enters from one end of these cylindrical bodies, exits from the other end, and rises to the surface of the solution. A solution heating concentration method characterized by heating and concentrating a solution while forming a solution flow.