JPH0523501A - Solution concentrator - Google Patents

Abstract

PURPOSE:To concentrate a solution to be concentrated without heating the solution and damaging the same by heat. CONSTITUTION:A solution concentrator is equipped with a concn. means 10 evaporating a solution 14 to be concentrated under vacuum to concentrate the same, an absorbing means 11 letting an absorbing solution 25 absorb the steam generated by the concn. means and a regenerating means 12 concentrating the diluted absorbing solution 31 of the absorbing means 11 to supply the conc. absorbing solution to the absorbing means 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solution concentrating device for concentrating a solution to be concentrated in a vacuum without heating it.

[0002]

2. Description of the Related Art A conventional solution concentrator, as shown in FIG. 3, heats water 2 in a first container 1 with a heat source such as a boiler,
The steam 3 is introduced into the second container 5 through the pipe 4.
On the other hand, the solution 6 to be concentrated is introduced into the second container 5 via the third container 7, and is heated by the latent heat of the steam 3 in the pipe 4 in the second container 5, so that the steam 8 in the solution 6 is converted into the pipe 9.
Is introduced into the third container 7 and the original solution 6 is heated. That is, the solution 6 is first heated in the third container 7 and then concentrated in the second container 5.

[0003]

In the case of the above-mentioned conventional apparatus, since the solution 6 to be concentrated is heated, a heat-sensitive solution such as certain antibiotics, certain vitamins, high protein solutions, bacteria and There is a problem that it is difficult to apply to microbial liquids such as yeast, various fruit juices, chemicals such as blood products, and foods. Further, in the case of concentrating by low temperature heating, there is a problem that concentration, that is, evaporation efficiency is extremely poor.

In view of the above points, the present invention has an object to provide a solution concentrating device for concentrating a solution to be concentrated without heating.

[0005]

In order to solve the above-mentioned problems, the solution concentrating device of the present invention comprises a concentrating means for evaporating and concentrating a solution to be concentrated in a vacuum, and steam generated by the concentrating means. The absorption means for absorbing the absorption liquid and the regeneration means for concentrating the diluted absorption liquid of the absorption means and supplying it to the absorption means are provided.

Further, there are provided compression means for compressing the steam generated by the regeneration means to form high temperature steam, and a regeneration heat exchanger for supplying latent heat of the high temperature steam by the compression means to the absorption liquid of the regeneration means. It is a thing.

[0007]

In the solution concentrating apparatus of the present invention configured as described above, the solution to be concentrated is evaporated and concentrated in a vacuum by the concentrating means, so that the solution is not heated and the solution is not damaged by heat. Moreover, there is no fear that the solution will be oxidatively deteriorated. Furthermore, the water vapor from the solution is absorbed by the absorbing liquid of the absorbing means,
Since the diluted absorbing solution is concentrated by the regenerating means and supplied again to the absorbing means, it is not necessary to replenish the absorbing solution.

Further, the compression means compresses the steam of the regenerating means into high temperature steam, and the latent heat of the high temperature steam is supplied to the absorbing liquid of the regenerating means by the regenerating heat exchanger, so that the thermal energy in the regenerating means is increased. Is saved and operating efficiency is improved.

[0009]

EXAMPLES Examples will be described with reference to FIGS. 1 and 2. (Embodiment 1) First, in FIG. 1 showing Embodiment 1, the entire system of the concentrating means 10, the absorbing means 11, the regenerating means 12 and the condensing means 13 is in a vacuum state, and the solution 14 to be concentrated is pumped by a pump 15, Water is sprayed into the concentrating means 10 from the water sprinkler 18 of the concentrating means 10 through the pipe 16 and the flow rate adjusting valve 17.
At this time, since the inside of the concentrating means 10 is in a vacuum state, 6
If there is a temperature of ℃ or more, it will boil and evaporate, and the solution 14 will be concentrated and become a concentrated solution 22 via the pump 19, the flow rate adjusting valve 20, and the pipe 21.

On the other hand, the solution 14 to be concentrated is the concentration means 1
Since the heat of vaporization is dissipated by the boiling evaporation at 0, and the temperature is lowered, it is desirable to supply heat by the heat supply pipe 23 and maintain it in the range from room temperature to several tens of degrees Celsius to further improve the operation efficiency.

If the water vapor generated in the concentrating means 10 is left as it is, the vapor pressure increases and the evaporation efficiency decreases. Then, the water vapor passes through the passage 24 and the absorbing means 11
In the absorbing means 11, the absorbing solution 25 such as a high-concentration LiBr solution is sprinkled from the sprinkler 29 through the pump 26, the pipe 27, and the flow rate adjusting valve 28 so that the absorbing solution 25 absorbs water vapor, Maintaining a low pressure state, concentrating means 1
Means for evaporating and absorbing solution 14 to be concentrated at 0
To continue to absorb water vapor.

At this time, since the absorbing liquid 25 normally generates absorption heat by absorbing water, the temperature of the absorbing liquid itself rises and the absorption efficiency decreases. Therefore, heat is absorbed by the heat absorbing pipe 30 through which the cooling water flows, and the temperature rise in the absorbing means 11 is prevented.

Next, the diluted absorbing solution 31 which has absorbed water vapor and has a reduced concentration flows into the regenerating means 12 through the pump 32, the pipe 33, the flow rate adjusting valve 34 and the heat exchanger 35, and is heated by the heating burner 36. Then, the absorbed water vapor is released to become the concentrated absorbing liquid 25, and the concentrated absorbing liquid 25 is sprayed from the water sprinkler 29 through the heat exchanger 35, the pipe 27, and the flow rate adjusting valve 28. The heating means in the regeneration means 12 is not limited to the burner 36.

Then, the water vapor released in the regenerating means 12 flows into the condensing means 13 through the passage 37.
On the other hand, the heat absorbing pipe 30 of the absorbing means 11 is connected to the heat transfer pipe 39 in the condensing means 13 via the pipe 38, and the cooling water in the heat transfer pipe 39 cools the steam to become a cooling liquid.

(Second Embodiment) A second embodiment will be described with reference to FIG. The difference between this embodiment and the first embodiment is as follows. In the passage 37 for water vapor generated in the regenerating means 12,
A regenerating heat exchanger 41 is provided which is provided with a compressing means 40 for adiabatically compressing the steam to form high-temperature steam, and which supplies the latent heat of the high-temperature steam formed by the compressing means 40 to the absorbing liquid 25 of the regenerating means 12. That is the point. in this case,
By condensing the high temperature steam in the regenerative heat exchanger 41, the latent heat can be recovered at a temperature higher than that of the steam generated in the regenerating means 12.

For example, in the reproducing means 12, 100 ° C. =
Water vapor evaporated at 1 kg / cm ² is compressed by the compression means 40 to 30
About 12 by compressing and compressing to 1.3Kg / cm ^2.
Water vapor of 5 ° C. can be obtained and 100 of the regeneration means 12 can be obtained.
Sufficient heat can be supplied to the absorbing liquid 25 at 0 ° C. The pressure boosted by the compression means 40, that is, the temperature rise is arbitrarily set as needed.

[0017]

Since the present invention is configured as described above, it has the following effects. Concentration means 1
Since the solution 14 to be concentrated by 0 is evaporated and concentrated in a vacuum, the solution 14 is not heated, there is no concern that the solution 14 is damaged by heat, and the oxidative deterioration of the solution 14 can be prevented. In addition, since the water vapor from the solution 14 is absorbed by the absorbing liquid 25 of the absorbing means 11, and the diluted absorbing liquid 31 is concentrated by the regenerating means 12 and supplied to the absorbing means 11 again, it is necessary to replenish the absorbing liquid 25. Not.

Further, the reproducing means 12 is constituted by the compression means 40.
Of the steam is compressed into high-temperature steam, and the latent heat of the high-temperature steam is supplied to the absorbing liquid 25 of the regenerating means 12 by the regenerative heat exchanger 41, so that the heat energy of the heating burner in the regenerating means 12 is saved. The operation efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a system diagram of a first embodiment of the present invention.

FIG. 2 is a system diagram of a second embodiment of the present invention.

FIG. 3 is a system diagram of a conventional example.

[Explanation of symbols]

10 Concentration means 11 Absorption means 12 Playback means 14 Solution to be concentrated 25 absorption liquid 31 diluted absorbent 40 compression means 41 Regenerative heat exchanger

Claims (2)

[Claims] 1. A concentrating means for evaporating and concentrating a solution to be concentrated in a vacuum, an absorbing means for absorbing water vapor generated by the concentrating means into an absorbing solution, and a concentrated absorbing solution for the absorbing means, A solution concentrating apparatus comprising: a regenerating unit that supplies the absorbing unit. 2. A compression means for compressing the steam generated by the regeneration means to form high temperature steam, and a regeneration heat exchanger for supplying the latent heat of the high temperature steam by the compression means to the absorption liquid of the regeneration means. The solution concentrating device according to claim 1, which is provided.