JPS59123582A - Apparatus for concentrating aqueous solution - Google Patents

Abstract

PURPOSE:To concentrate in a short time an aq. soln. having different compositions without being contaminated by other substances by arranging a trap, a part of which is covered with a coolant between a vacuum vessel and a vacuum pump when the aq. soln. containd in the vacuum vessel is concentrated by heating and sucking with the vacuum pump. CONSTITUTION:A vessel 7 filled with an aq. soln. 8 is contained in a vacuum vessel 1, and a heater 2 is actuated by a temp. controlling unit 3. The part between a three-way cock 9 and a vacuum pump 13 is evacuated by setting the pump 13 in motion. Then, after a part of a trap 12 is set to a coolant 16, the inside of the vacuum vessel 1 is evacuated by opening the three-way cock 9 and the aq. soln. 8 is concentrated. The water content of the aq. soln. 8 is rapidly evaporated in the vacuum vessel 1 and condensed in the trap 12, and the aq. soln. 8 is rapidly concentrated or evaporated to dryness.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aqueous solution condensing device capable of concentrating or evaporating to dryness a large number of water bath solutions having different compositions in a short time and without being contaminated by other substances.

Conventionally, when condensing an aqueous solution, there have been two methods: using an evaporator, and heating a container such as a beaker containing the aqueous solution externally to evaporate water in the atmosphere. The method of using an evaporator is to clean the evaporator container thoroughly to remove any contaminants, and then
C: The water bath liquid to be concentrated is injected and heated externally to evaporate the water. At this time, an air pump may be used to lower the air pressure inside the evaporator so that the water evaporates more quickly. In this method of using an evaporator,
It takes time to wash the inside of the container, and it takes a long time to repeatedly concentrate water bath liquids with different p1 compositions, which has the disadvantage that it cannot be used for short-scale evaporation to dryness.

Next, the method of heating a container containing an aqueous solution externally to evaporate water in the atmosphere is to heat a container such as a beaker containing an aqueous solution on a burner with asbestos-coated copper or on a hot plate. An aqueous solution is concentrated or evaporated to dryness by evaporating water. At this time, to avoid contamination by other substances from the atmosphere, a watch glass can be placed on top of the container;
Alternatively, water may be evaporated more quickly by spraying an inert gas such as dry air. If a watch glass is used to heat the container containing the water bath liquid from the outside and evaporate the water in the atmosphere, it is possible to prevent contamination from other substances from the atmosphere to some extent, but the water The drawback is that it takes a very long time for the water to evaporate.Also, instead of using a watch glass, water can be evaporated by spraying an inert gas such as dry nitrogen gas or dry air onto the components in the water bath. Although this can be done quickly, there is a problem in that pollutants from these dregs or from the atmosphere are mixed into the water bath liquid.

The object of the present invention is to eliminate such conventional drawbacks and to provide a water bath that can condense or evaporate to dryness a large number of water bath liquids with different compositions in a short time and without being contaminated by other substances. An object of the present invention is to provide a liquid condensation device.

The aqueous solution condensing device of the present invention comprises: a vacuum container provided with a lid for containing a container containing a water bath liquid to be condensed; a vacuum container provided with a heater for heating the container; a vacuum pump connected to the vacuum container; The trap is inserted between the vacuum container and the vacuum pump and is partially covered with a refrigerant.

The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

In the diagram, 1 is a vacuum container made of heat-resistant glass or metal 6.
D. A heater 2 is provided at its bottom.

3 is a heater temperature control unit for controlling the heater temperature appropriately.

4 is a lid of the vacuum container 1, and a rubber O-ring 5 is provided between the vacuum container 1 and the lid 4 to maintain the vacuum. If the vacuum container 1 is made of gold, this lid 4 may be made of glass or may be provided with a viewing window 6 so that the inside of the container can be seen.
This shall be made from leftover scraps.

7 is a container such as a beaker, and 8 is an aqueous solution to be concentrated or evaporated to dryness. 9 is a 30,000 kettle for opening and closing the vacuum and leaking to the atmosphere through the leak nozzle 10. A trap 12 is connected to the end of this three-way socket 9 by a connecting part 11 (for example, a vacuum rubber pipe). The traps 12 are further connected to the vacuum pumps 1-3 by means of connecting parts 11, and these traps 12
A two-way tank 14 is provided between the vacuum pump 13 and the vacuum pump 13. The trap 12 is cooled by a refrigerant (eg liquid nitrogen) 16 in a dewar bottle 15.

The procedure for concentrating this water bath liquid is as follows. First, remove the lid 4 and place a container 7 such as a beaker containing an aqueous solution into the heater 2.
Place it on top and cover with lid 4. Next, the heater 2 is operated by the heater-temperature control unit 3, and the vacuum pump 13 is operated, the two-way cock 14 is opened, and the part up to the cock 9 is evacuated. Next, after sectioning the refrigerant 16,
Open the cock 9 and evacuate the inside of the vacuum container 1. The temperature of the heater is changed appropriately depending on the rise of the aqueous solution and the evaporation of water. By the above operation, the water in the water bath g8 quickly evaporates in the vacuum container 1 and condenses in the trap 12, so that the water bath liquid can be quickly concentrated or evaporated to dryness.

In this device, since the vacuum container 1 and the lid 4 are heated by the heat from the heater 2, water does not condense on their inner walls, and all the water that evaporates from the bath liquid 8 is condensed by the trap 12. Ru.

Furthermore, unlike in the case of an evaporator, the aqueous solution does not need to be poured into the vacuum container itself, and not only is it completely cut off from the outside air, but contaminants from the vacuum bomb 13 side are removed by the trap 12. The bathing liquid is not contaminated by other substances during the rice cultivation or evaporation to dryness because it is trapped by the light. Also, unlike in the case of an evaporator, the aqueous solution is not directly applied to the vacuum container itself, so
There is no need to color sand the apparatus, and rice bowling and evaporation to dryness operations can be repeated just by crossing the trap 12. Furthermore, depending on the situation, it is also possible to simultaneously concentrate and evaporate several types of aqueous solutions to dryness, making it possible to process a large number of aqueous solutions in a short time.

FIG. 2 is a block diagram of a trap section according to another embodiment of the present invention, which is applied when the amount of water bath liquid is large.

If the water bath solution has many caps and a large amount of water must not be evaporated, a trap that can condense a large amount of water is required, but it is not possible to use just one large-capacity trap. The efficiency is poor, and moisture enters the vacuum pump, lowering the rudder of the pump and causing failure of the vacuum pump. In this case, several traps 17 to 19 are connected,
Coolants 20 to 22 with lower temperatures are used in order from the water vapor inlet side to the vacuum pump side. In this case, 20 may be ice, 21 may be dry ice, and 22 may be liquid nitrogen.

By connecting the traps in this way, the water vapor is condensed and trapped as water in the trap 17, the remaining water vapor is further condensed in the trap 18, and the water vapor that remains uncondensed is trapped in the trap 17.・It is completely condensed and trapped in lap 19.

As described above, by using the aqueous solution condensation apparatus of the present invention, a large number of water and marsh liquids having different compositions could be evaporated to dryness in a short time and without being contaminated by other substances.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of a trap portion of a second embodiment of the present invention. In the diagram: 1...X empty $6.2... heater, 3
... Group/Heater Temperature City 1] I Wholesale Unit, 4...
・I, 5...ComfilJ O-ring, 6...
... Viewing window, 7 ... Container such as a beaker, 8
...Water bath liquid, 9...3-way pot, 1o
... Group leak nozzle, 11 ... Connection parts, 1
2.17.18.19...Trap, 13...
・U-pump, 14... River, 2-way pump, 15...
・・・Duwar Thief, 16... Group Refrigerant, 20...
・Ice, 21...Dry ice, 22...
・It is liquid nitrogen.

Claims (1)

[Claims] A vacuum container with a lid and a heater to heat the container to hold the water bath liquid to be concentrated, a vacuum pump connected to this vacuum container, and a vacuum pump inserted between the vacuum container and the vacuum pump. An aqueous solution@condensing device comprising a trap partially covered with refrigerant.