JPS63130107A - Automatic deaerator - Google Patents

Abstract

PURPOSE:To enhance deaeration velocity and to miniaturize the title apparatus by providing a vibrator for vibrating liquid in the case of deaerating liquid by evacuating it. CONSTITUTION:Air is drawn from a deaeration bottle 5 by closing an on-off valve 12 on an outlet side and opening an on-off valve 4 on an inlet side and actuating an exhaust pump 9, and the inside of the bottle 5 is evacuated and raw liquid 1 is introduced therein and when the raw liquid 1 is sufficiently introduced by means of a liquid level sensor 11, the valve 4 is closed and the inside of the bottle 5 is made to a state of negative pressure and gas incorporated in the raw liquid 1 is deaerated. In this case, the raw liquid 1 is agitated by rotation of a rotator 10 such as a magnetic stirrer or by ultrasonic wave or the like and vibration is given and deaeration velocity is enhanced. In such a way, the apparatus can be miniaturized since deaeration is efficiently performed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an automatic degassing device for degassing a liquid.

For example, it can be used to degas constant temperature water supplied to a constant temperature bath to keep a reaction cell at a constant temperature (e.g. 37°C) in an automatic chemical analyzer, or it can be used for reagent pumps, sample pumps, etc. This invention relates to an automatic degassing device used for degassing pure water.

(Conventional technology) FIGS. 2 and 3 show conventional examples of this type of deaerator.

First, the conventional example shown in FIG. 2 will be explained.

In FIG. 2, l represents the stock solution to be degassed, which is contained in the stock solution container 2. When the inside of the deaeration bottle 5 is made to have a negative pressure by the exhaust pump 9, this stock solution 1 flows into the deaeration bottle 5 through the inlet tube 3. Reference numeral 4 denotes an inlet side opening/closing valve, which opens and closes the flow path of the inlet side tube 3.

The deaeration bottle 5 is a pressure-resistant container, and has the function of storing the stock solution 1 and maintaining a reduced pressure. Furthermore, a heater 20 is provided at the bottom.

A deaeration bottle lid 6 seals the deaeration bottle 5 and holds the exhaust tube 7 therethrough.

The exhaust pump 9 is a pump for making the inside of the degassing unit 5 low pressure, and is connected to the degassing unit 5 through an exhaust tube 7.

11 is a liquid level sensor, which has a function of measuring the water level in the deaerator 5.

Reference numeral 12 denotes an outlet side opening/closing valve, which has a function of opening and closing the flow path of the outlet side tube 14.

15 is a deaerated water container, which contains deaerated water 1 made from deaerated water 5
This is a container that temporarily stores 6.

Reference numeral 17 denotes a tube that leads the degassed water 16 to another pump (not shown), and through this tube 17, the degassed water 16 is supplied to a constant temperature bath, pump, etc. of an automatic chemical analyzer (not shown).

Reference numeral 18 denotes a pressure sensor provided on the deaeration bottle lid 6, which detects the pressure inside the deaeration unit 5 and sends a signal to the control device, which controls the exhaust pump 9.

A liquid level sensor 19 has a function of measuring the water level in the deaerated water container 15.

In the conventional degassing device as described above, when the outlet side on-off valve 12 is closed, the inlet side on-off valve 4 is opened and the exhaust pump 9 is operated, air escapes from the deaeration unit 5 and air is removed from the deaeration unit 5. The pressure is reduced, and the FX liquid 1 passes through the inlet tube 3 and enters the deaerator 5.

When the stock solution 1 has sufficiently entered the deaerator 5 and the liquid level sensor 11 detects that the stock solution 1 has sufficiently entered.

A control device (not shown) closes the inlet side on-off valve 4.

Thereafter, when the exhaust pump 9 continues the exhaust operation, the interior of the deaerator 5 becomes a predetermined negative pressure state, and the gas in the stock solution is degassed.

At this time, the deaeration effect is enhanced by heating the stock solution 1 using the heater 20.

During this time, the pressure sensor 18 detects the pressure inside the deaerator 5,
A signal is sent to the control device, and the control device controls the exhaust pump 9. When a predetermined period of time has elapsed, the operation of the exhaust pump 9 is stopped, and the outlet side on-off valve 12 is stopped.
is opened and the degassed liquid in the deaerator 5 flows through the outlet tube 14 to the degassed water container 15.

The degassed water 16 thus produced is supplied to a constant temperature bath through a tube 17, or used in a reagent pump, sample pump, etc.

Then, the liquid level sensor 19 of the degassed water container or the degassed water container 15
When the liquid level of the degassed water 16 inside is detected and it is detected that the remaining amount of the degassed water 16 is small, the above deaeration operation is repeated again.

Next, a conventional example shown in FIG. 3 will be explained.

This deaerator uses a membrane separation method as the deaeration method.
The raw water 1 passes through a special synthetic resin membrane 21. This synthetic resin 15i21 is stored in a vacuum container 2 controlled by a pressure sensor 22, a control device 23, and an exhaust pump 24.
The gas with high mobility and small molecular size dissolved in the water permeates through the 115i wall, is separated and discharged, and is sent to the degassed water 16 from the device outlet by the liquid feed pump 26.
is being supplied.

(Problem that the invention attempts to solve) However, the conventional devices such as those mentioned above.

There are some problems as follows.

First, in the case of the apparatus shown in FIG. 2, if the capacity of the heater 20 is smaller than the capacity of the deaerator 5, the heating rate of the liquid is small and the degassing rate is slow.

Next, as shown in Figure 3? For example, at 250°C, water containing about 9 ppm of dissolved oxygen is heated at 20°C per hour.
When degassing to 0.5 pp- or less, if you use a pump that can create a suction pressure of 50 smoH in the vacuum container 25, the pressure will be approximately 11 liters.
This method has the disadvantage that it requires a vacuum container of 1 liter and the apparatus becomes large. Another disadvantage is that the price is high because a large amount of the special synthetic resin film 21 is used.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the conventional devices as described above, and to provide an automatic degassing device that has a high degassing speed, is small in size, and is inexpensive.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention provides an apparatus for deaerating a liquid by pulling the liquid, which is provided with a vibration means for vibrating the liquid during deaeration. The structure is as follows.

Note that the vibration referred to here also includes stirring.

(effect) With the above configuration, the present invention operates as follows.

That is, when performing vacuum deaeration, if the water to be deaerated is vibrated, the deaeration speed becomes faster.

Since the present invention employs a vacuum degassing method similar to the apparatus shown in FIG. 2 described above, it can be made compact and can be built into an automatic chemical analyzer or the like.

In addition, when water is warmed and vacuum degassed as in the past, it may be necessary to return the water temperature once it has risen to room temperature, but according to the present invention, there is no need to warm the water, so the above-mentioned method is possible. In such cases, there is no need to return the water temperature to room temperature each time.

Furthermore, unlike the device shown in FIG. 3, the present invention does not use a special synthetic resin and is therefore inexpensive.

(Example) The illustrated embodiment will be described below.

FIG. 1 is a schematic diagram showing an embodiment of an automatic degassing device according to the present invention, and parts similar to those of the conventional device shown in FIG. 2 are denoted by the same reference numerals. The difference from the conventional apparatus is that, in place of the conventional heater 20, a rotating body 1O placed in a degassing bottle 5 and a driving means 13 for the rotating body 10 are provided as vibration means. Specifically, rotating body 1
0 is constituted by a magnetic stirrer, and the driving means 13 includes a rotating body having a magnet for rotating this magnetic stirrer.

The degassing device described above operates almost the same as the conventional device described above, but when degassing, the conventional device
Whereas the degassing effect was enhanced by heating the stock solution 1 at zero temperature, in this example, by rotating the rotating body 10, 11 tWl of liquid was stirred and vibrated, thereby increasing the degassing rate. Very different.

In such an automatic degassing device, in order to reduce water containing approximately 9 ppm of dissolved oxygen to 5 ppm or less using a liter degassing bottle, a pump that can increase the pressure inside the degassing bottle 5 to 50 + uiHg is required. Using this, it was possible to produce 201 g of degassed water per hour. Incidentally, the above one hour includes the time to bring the pressure inside the degasser bottle 5 to 50 mmHH, the time to inject the stock solution into the degasser bottle 5, and the time to transfer the degassed liquid to the degassed water container 15. .

In addition, using a 500 sl bottle, we were able to produce approximately 4.51) Ill of degassed water, resulting in approximately 3011/H.

Although one embodiment of the present invention has been described above, it goes without saying that the present invention is not limited to the above-mentioned embodiment, and can be modified as appropriate within the scope of the gist of the present invention.

As the vibration means, not only a rotating body but also ultrasonic waves, a pump, and other appropriate means can be used.

[Effects of the Invention] As described in detail above, according to the present invention, by vibrating the liquid during degassing, the degassing speed can be increased, and the device can be made smaller and less expensive.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an embodiment of an automatic degassing device according to the present invention, and FIGS. 2 and 3 are schematic diagrams of conventional devices, respectively. l...Standard solution, 2...Standard solution container, 3...Inlet side tube, 4...Inlet side on/off valve, 5...Deaeration bottle, 6...
- Deaeration bottle lid, 7... Exhaust tube, 9... Exhaust pump, lO... Rotating body, 11.19... Liquid level sensor,
12... Outlet side on-off valve, 14... Outlet side tube,
15... Deaerated water container, 16... Deaerated water, 17...
Tube, 18...pressure sensor. Agent Patent Attorney Nori Chika Kyodo
Norio Ogo, I I6 Figure 2

Claims (4)

[Claims] (1) An automatic degassing device for degassing liquid, characterized in that it is provided with a vibration means for vibrating the liquid during degassing. (2) The automatic degassing device according to claim 1, wherein ultrasonic waves are used as the vibration means. (3) The automatic degassing device according to claim 1, wherein a magnetic stirrer is used as the vibration means. (4) The automatic degassing device according to claim 1, wherein vibration of a pump is used as the vibration means.