JPH07270285A - Sample-concentration and liquid-purification device - Google Patents

Abstract

PURPOSE:To improve the efficiency of concentration or purification and to increase the degree of concentration or purification by providing an atomizer, a heater, a concentrator, and an absorber. CONSTITUTION:A sample liquid 2 is atomized by a sprayer or an ultrasonic system in an atomizer 3 and a generated mist 4 is carried by a gas 1 and then enters a heater 5, where the mist is heated by radiation heat or electromagnetic wave by a heater or an infrared ray lamp to become fine mist/particle steam 6 and to enter a condenser 7. In the condenser 7, the steam comes into contact with a wall surface which is cooled by a coolant and a refrigerant or a Peltier element and is condensed and then water is eliminated. a dry gas 9 from which water is removed, is carried to an absorber 10. An absorber where, for example, a sample liquid is partially sampled is used as an absorbent 11 of the absorber 10, where the dry gas 9 is introduced to collect contained constituents. By atomizing the sample, an evaporation surface area is increased, thus performing concentration efficiently and enhancing the degree of freedom for selecting and setting the quantity, quality, and type of the absorbent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sample concentrating and liquid purifying apparatus for atomizing a sample liquid or a raw material liquid to concentrate the sample or purify the liquid.

[0002]

2. Description of the Related Art Generally, when analyzing a liquid containing an extremely small amount of components, it is necessary to heat and cool the sample to concentrate the sample, and then introduce the sample into a high-frequency inductively coupled plasma device to ionize the contained components for analysis. It is being appreciated. Further, in the case of refining a raw material liquid, for example, producing ultrapure water, conventionally, a non-boiling type ultrapure water producing device has been used in which pure water is heated to evaporate and water vapor is cooled to return to water.

[0003]

By the way, in the conventional sample concentrator, the concentration is not always sufficient, and
There is a problem that it takes time to concentrate,
The non-boiling type ultrapure water producing device has a problem that it takes a very long time to condense. The present invention is to solve the above problems, and to increase the efficiency of concentration or purification,
An object of the present invention is to provide a sample concentrating and liquid purifying apparatus capable of increasing the degree of concentration or the degree of purification.

[0004]

According to the present invention, an atomizer for atomizing a sample liquid, a heater for heating the atomized mist, a condenser for cooling and condensing the heated mist, and a condenser It is characterized by comprising an absorber into which the dry gas from which the solvent component has been removed is introduced and which is absorbed by the absorbent to concentrate the sample component. The present invention also includes an atomizer that atomizes the raw material liquid, a heater that heats the atomized fog, a condenser that cools and condenses the heated fog, and a liquid obtained by condensation. And a circulation system for returning the condensed liquid from the condenser to the condensed liquid.

[0005]

The present invention makes it possible to efficiently concentrate the sample or purify the liquid by increasing the evaporation surface area by atomizing the treated liquid, and to cool the dried gas, which has been cooled and condensed to remove the water, in the absorber. By absorbing it, the sample concentration is increased,
By circulating and processing the condensed liquid, the degree of purification of the liquid can be increased.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. Sample analysis using a high-frequency inductively coupled plasma device is known. In this case, the sample is atomized, the dry gas obtained by heating and cooling this is introduced into the plasma, and the contained components are ionized and analyzed. is doing. In this example, this analysis method was used for sample concentration, and the components contained in the dry gas were not directly introduced into the high-frequency inductively coupled plasma apparatus but were once absorbed by the absorbent and stored, and this was measured. By using a sample, it can be easily qualitatively and quantitatively determined even in ultrapure water which contains only a trace amount of impurities in a concentrated manner.

In FIG. 1, a gas 1 is supplied to an atomizer 3 for atomizing a sample liquid 2 for the purpose of atomizing and carrying the generated fog. The atomized mist 4 is introduced into a heater 5 and heated, and is further made into fine mist or particles and water vapor. The mist / particulate water vapor 6 is further cooled and condensed by the condenser 7, the condensed water 8 is separated from the dry gas 9, and the dry gas 9 is introduced into the absorber 10 to form fine mist droplets contained in the dry gas. And the particles are absorbed. The absorber 10 contains an absorbent 11, which has an inlet 14, an outlet 12,
A gas exhaust port 13 is provided.

Next, the concentration process will be described. The sample liquid 2 is atomized by the atomizer 3 by means of atomization or ultrasonic wave method, and the generated mist 4 is carried by the gas 1 and enters the heater 5. Here, it is heated by radiant heat from a heater or an infrared lamp, electromagnetic waves, etc., and becomes fine mist / particulate water vapor 6 and enters the condensation 7. Here, the incoming steam comes into contact with the wall surface cooled by using cooling water, a refrigerant or the like, or a Peltier element or the like to condense and remove water. Dehydrated dry gas 9
Are transported to the absorber 10. As the absorbent 11 of the absorber 10, for example, a part of the sample solution is used, and a dry gas is introduced therein to recover the contained components.

The gas to be used needs to be purified, but a unit for purifying the gas may be incorporated,
The gas from the exhaust port 13 may be reused. Further, the absorber 10 may have a structure containing micro beads or the like in order to secure the recovery rate, and the absorbent has a high purity even if it is not a part of the sample solution. Any method may be used as long as it is suitable for the purpose, and a method of using this as an absorbent and extracting from it may be used. Further, the sample solution is not limited to the aqueous solution.

FIG. 2 shows another embodiment of the present invention, showing an apparatus for producing ultrapure water. In this embodiment, raw material water to be purified into ultrapure water is used instead of the sample liquid of Example 1, and condensed water obtained from the condenser 7, that is, ultrapure water is passed through a circulation system having a circulation pump 15 as a raw material. The difference is that it was returned as water and condensed again. The raw material water 2 is atomized by the atomizer 3, is conveyed to the heater 5 by the gas 1, is heated, is made into finer mist and water vapor, and is further sent to the condenser 7 to be cooled water, liquefied gas, and refrigerant gas. , In a condenser having a wall surface cooled by means such as a Peltier element, water in the state of water vapor comes into contact with the wall surface and becomes liquid ultrapure water, and fine mist or particles containing impurities are dried. It is discharged as gas 9. Further, the ultrapure water that has been condensed into the liquid is returned to the inlet of the raw material water through the circulation system by the circulation pump 15 to further raise the degree of purification.

Not limited to the above embodiment, the raw material water to be used may be heated, or the gas used to carry atomization or steam may be heated, and the gas used needs to be purified. However, this purification step may be incorporated into this system. The system may be one in which impurities are removed from the gas discharged as a dry gas and reused, or the condensed water may not be circulated, and the system may be multistaged to successively raise its purity and purify. Not only water but also other solvents may be applied.

FIG. 3 is a diagram showing a specific example of the concentration / purification device of the present invention. The sample liquid or the raw material liquid 21 is introduced into the tank 20 through a valve 36. This liquid is pumped up by the peristaltic pump 22 and atomized through the nebulizer 23. Nebulizer gas is introduced into the nebulizer 23 through a valve 24, and a mist 2 is introduced from a tip of the nebulizer gas into a spray chamber 26.
7 is blown out. A nebulizer gas is introduced into the spray chamber 26 via the valve 25 in order to efficiently transfer the atomized mist. As the nebulizer gas, for example, clean air or the like may be used. The atomized mist is heated by heaters 28 and 29, made into particles having a small particle size, conveyed through a pipe 30, cooled by a cooler 31 and taken out from a discharge port 32 as fine mist or carrier gas. The water that has been cooled to become water vapor is taken out from the peristaltic pump 34 through the valve 33 or returned to the tank 20 through the peristaltic pump 35, and atomized cyclically. As a result, for example, if the raw material liquid is pure water, ultrapure water will be extracted from the peristaltic pump 34. The remaining liquid not transferred in the spray chamber 26 is discharged through the valve 38 or returned to the tank 20 through the peristaltic pump 37. On the other hand, the dry gas is guided to the tank 40 containing the absorbent 41, where the impurities contained in the sample solution are absorbed and concentrated. The impurities thus absorbed by the absorbent 41 are taken out, introduced into, for example, a high-frequency inductively coupled plasma apparatus, turned into plasma, and subjected to analysis. If the tank 40 has a double structure and the inside is a container and the outside is a cover so as to have a closed structure, more accurate concentration can be performed.

[0013]

As described above, according to the present invention, the evaporation surface area can be increased by atomizing the sample, and the concentration can be efficiently performed, and the amount, quality and type of the absorbent can be selected and set. The degree of freedom can be increased. Also, when it is used for purification of raw material liquid such as ultrapure water, the evaporation surface area can be similarly increased to improve the condensation efficiency, and impurities are discharged out of the system together with the dry gas. It is possible to further improve the degree of purification by repeating.

[Brief description of drawings]

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

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a diagram showing a specific example of the concentration / purification device of the present invention.

[Explanation of symbols]

1 ... Transport gas, 2 ... Sample liquid, 3 ... Atomizer, 4 ... Fog, 5
... heater, 6 ... fog retainer / particulate water vapor, 7 ... condenser, 8 ... condensed water, 9 ... dry gas, 10 ... absorber, 11 ... absorbent, 1
2 ... discharge port, 13 ... exhaust port, 14 ... injection port.

Claims (2)

[Claims] 1. An atomizer for atomizing a sample liquid, a heater for heating the atomized mist, a condenser for cooling and condensing the heated mist, and a dry gas from which a solvent component has been removed by condensation. A sample concentrator that is introduced and is absorbed by an absorbent to concentrate the sample components. 2. An atomizer for atomizing a raw material liquid, a heater for heating the atomized mist, a condenser for cooling and condensing the heated mist, and an atomizing liquid obtained by the condensation. And a circulating system for returning the condensed liquid condensed from the condenser.