JPS62225204A - Distilling purifying device - Google Patents

Abstract

PURPOSE:To prevent the redissolution of evaporated impurities into the condensate by providing a condensation part in a evaporation part to keep the temp. of the condensate in the condensation part stably at a temp. close to the b.p. in the titled distilling purifying device for producing extremely pure water. CONSTITUTION:Raw water is heated by a heater 3 to a temp. higher than the b.p. at the pressure in an evaporator 4, and injected into the evaporator through a nozzle 5. Particulate impurities are removed from the evaporated steam by a filter 6, and then the steam is introduced into a condenser 7. The steam introduced into the condenser 7 is cooled by a cooling pipe 8, condensed, and accumulated at the lower part as a condensate. At this time, since the condenser 7 is heated by the outside evaporator, the temp. of the condensate is kept at a temp. close to the b.p. Consequently, soluble impurities which have been contained in the raw water and evaporated in the evaporator are not redissolved in the condensate even when introduced into the condenser, and high-purity distilled water is produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a distillation purification apparatus for purifying a liquid to high purity. In particular, the present invention relates to an apparatus suitable for producing ultrapure water.

[Conventional technology]

Conventional technologies include reverse osmosis and ultrafiltration.As shown on page 181 of the ``Membrane Utilization Technology Handbook'' (edited by Haruhiko Oya, published by Saiwai Shobo), the evaporation section and condensation section are connected by piping. It does not have a heavy container structure.

There is no consideration given to heating the condensate.

No consideration is given to preventing re-dissolution of evaporated impurities into the condensate.

[Problem that the invention seeks to solve]

Conventional technology maintains the temperature of the condensate near its boiling point.

Not enough consideration has been given to how to prevent the evaporated impurities from redissolving into the condensate, and if the temperature of the condensate is low, the evaporated impurities will redissolve in the condensate, reducing the expected purification purity. There is a high possibility that this will not be obtained.

The purpose of the invention is to ensure that the temperature of the condensate is kept close to its boiling point.

[Means for solving problems]

The above object is achieved by providing the condensing section inside the evaporating section and keeping the outside of the condenser away from vapor or latent heat of vaporization within the evaporator.

[Effect]

The steam in the evaporator passes through a filter to remove particulate impurities contained in the steam! All but n flow into the condenser. The inflowing steam touches the cooling pipe and becomes a condensate.

The condensate in the condenser is heated by the vapor or condensate in the evaporator, ensuring that the temperature of the condensate remains near the boiling point temperature. This prevents the dissolved impurities that evaporated in the evaporator from redissolving into the condensate in the condenser.
High purity n-back liquid can be obtained.

〔Example〕

An embodiment of the present invention will be described below with reference to FIG. Raw water is sent from the raw water tank 1 to the heater 3 by the raw water pump 〒.

The raw water is heated by the edge heater 3 to a temperature higher than the boiling point at the pressure inside the evaporator 4, and passes through the nozzle 5 into the evaporator 4.
! Jt shoot. A part of the raw water injected from the nozzle 5 soaks up the heat of the evaporation layer and accumulates in the lower part of the evaporator 4 as a liquid.
The water returns to the suction side of the raw water bonder 2 via piping, mixes with the raw water from the raw water tank 1, and passes through the raw water pump 2 again. Evaporator 4
The evaporated vapor therein enters a condenser 7 after particulate impurities are removed by a filter 6. The steam that has entered the condenser 7 is cooled by the cooling pipe 8 and becomes condensate, which accumulates in the lower part of the condenser 7. Since the condensate in the condenser 7 is heated by coming into contact with the condensate in the evaporator 4 through the wall surface of the condenser 7, which is close to the boiling point temperature, the temperature of the condensate in the condenser 7 is also close to the boiling point temperature. is maintained. For this reason.

Dissolved impurities contained in the raw water and evaporated in the evaporator will not be redissolved in the condensate in the condenser 7 even if they enter the condenser 7. The high purity distilled water thus obtained is discharged to the primary pump 10.

On the other hand, when the impurity gas accumulated in the condenser 7 rises to a certain level or more, the impurity gas accumulates in the condenser 7.
The entire product is released out of the system. The bottom of the condenser 7 is the evaporator 4
The condensed water can be taken out from the bottom. This eliminates the problem of vaporization at the rising part of the pipe when condensed water is taken out to the top through the pipe.

The filter 6 is provided on the upper cover of the condenser 7. Another embodiment is shown in FIG. 2 in which the cooling pipe 8 and vent 9 pass through the upper cover of the condenser 7 and exit the system through the wall of the evaporator. The configuration and operation are the same as the embodiment shown in FIG. 1, but the structure differs from the embodiment shown in FIG. The top cover of the condenser 7 is the same as the top cover of the evaporator 4. Further, the end faces of the filter are kept in close contact with the condenser 7 and the evaporator 4. As shown in FIG. 3, the filter 6 is formed by folding a membrane into a cylindrical shape, so that the necessary filter membrane surface a can be obtained. The cooling pipe 8 and the vent 9 exit through a common upper cover of the condenser 7 and the evaporator 4 to the outside.

〔Effect of the invention〕

According to the present invention, there is no need for piping to connect the evaporator and condenser, so there is no problem of elution from the piping. Therefore, highly purified distilled water can be obtained, and the structure is simple because no piping is required.

Since the condensed water in the condenser is in contact with the steam or condensed water in the evaporator on the wall surface of the condenser, the temperature of the condensed water in the condenser is maintained near the boiling point temperature. Therefore, dissolved impurities evaporated in the evaporator can be prevented from being redissolved in the condensed water in the condenser. Further, particulate impurities can be removed by a filter. Highly purified distilled water can be obtained by these methods. In addition, if you try to take the condensed water in the condenser upwards through piping, the liquid may evaporate at a portion higher than the liquid level in the piping, but if the piping is a double-walled cooling pipe, the condensed water in the piping By cooling the condenser or by bringing the bottom of the condenser out of the evaporator and taking out the condensed water downwards, the condensed water will not re-evaporate in the piping and the expected miscarriage will not occur. .

Still another embodiment is shown in FIG. In this embodiment, the condensed liquid in the condenser 7 comes into contact with the vapor of the evaporator 4 generated from the nozzle 5 through the wall surface, and is heated. The operation and configuration other than this are the same as the embodiment shown in FIG. The structure is different from that in FIG. 1, in that the bottom of the condenser 7 is inside the evaporator 4, and the condenser 7 shares a part of the upper lid with the evaporator 4, so that it is supported via the upper lid. Vent 9. The cooling pipe 8 and the condensed water piping in the condenser 7 exit the system through the upper cover. The other structure is the same as the example shown in FIG. 1. Yet another embodiment is shown in FIG. The configuration and operation of this embodiment are the same as the embodiment shown in FIG. The structure differs from the example shown in FIG. 4 in that the filter 6 is attached to the side wall of the condenser 7, which simplifies the structure of the upper cover.

When attempting to take out the condensed water in the condensate 67 upwards through piping as in the embodiments shown in FIGS. 4 and 5.

Condensed water may re-evaporate at the rising end of the piping, and the expected flow rate may not be Iin. In this case, this configuration is the 6th
By creating a double structure as shown in the figure, by flowing condensed water into the inner pipe of the double pipe, and inserting partition plates in two places between the outer pipe and the inner pipe, cooling water is allowed to flow. , it is possible to prevent re-evaporation of condensed water at the rising part of the piping.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a system according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of a system according to another embodiment of the present invention, and FIG. 3 is a schematic top view of a filter suitable for use in the present invention. Figures 4 and 5 are system sectional views of still other embodiments! @ Figure 6 is a cross-sectional view of the double cooling pipe, Figure 7 is a cross-sectional view taken along line AA' in Figure 6, and Figure 8 is a cross-sectional view taken along line B-8' in Figure 6. 2... Raw water pump, 3... Heater, 4... Evaporator, 5... 10th 4ren lσ, -ga, pu・7°t4. ■

Claims (1)

[Claims] 1. In a distillation purification apparatus consisting of an evaporator, a filter, and a condensing section, the condensing section is provided inside the evaporating section, and the condensed liquid in the condensing section is heated by the vapor or condensed liquid in the evaporating section, In order to keep the temperature of the condensate in the condensing section stable near the boiling point temperature,
A distillation purification device characterized by a double container structure. 2. A distillation purification apparatus according to claim 1, having a structure in which the bottom surface of the condensing section is exposed outside the evaporating section. 3. A distillation purification apparatus according to claim 1, wherein the condensate in the evaporation section and the condensate in the condensation section are in contact with each other through a wall surface. 4. A distillation purification apparatus according to claim 1, wherein the vapor in the evaporating section and the condensed liquid in the condensing section are in contact with each other through a wall surface. 5. A distillation purification apparatus according to claim 2, which has a structure in which the condensed water in the condensation section is taken out below the bottom surface of the condensation section. 6. A distillation purification apparatus according to claim 1, having a structure in which condensed water in a condensing section is taken out upward.