JPH08266591A - Dissolving device for powder agent and method therefor - Google Patents

Abstract

PURPOSE: To prevent the splashing of a powder agent by providing the lower part of a dissolving vessel with a dissolving liquid supply means, providing this vessel with a powder agent supply means for supplying the powder agent to the dissolving vessel through a cap member for covering the upper part of the dissolving vessel and supplying a dissolving liquid after the supply of the powder agent from the powder agent supply means to the dissolving vessel is executed. CONSTITUTION: A dissolving liquid supply pipeline 11 is connected to the prescribed position on the rear surface of the dissolving vessel 1 and the dissolving vessel is provided with a washing liquid overflow outlet 14 in the prescribed position in its upper part. The dissolving vessel is removably provided with the cap member 15 so as to cover its upper opening. An opening 15c for introducing the powder material dropping from a hopper 12 into the dissolving vessel 1 is formed in the cap member 15. A control section 3 operates a powder agent supplying machine 22 to supply the prescribed amt. of the powder agent and to supply the powder agent to the dissolving vessel 1 through the hopper 12. The prescribed amt. of the dissolving liquid is then supplied through the dissolving liquid supply pipeline 11. The supply of the dissolving liquid is stopped after the liquid level attains the prescribed position. A stirring fan 16 is then operated to dissolve and stir the powder agent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for dissolving a powder agent, and more specifically, an apparatus and apparatus for supplying the powder agent and a solution to a dissolution tank and dissolving the powder agent with the solution. Regarding the method.

[0002]

2. Description of the Related Art Conventionally, an apparatus for dissolving a powder agent with a solution has been proposed in order to obtain a dialysate and the like. A conventional powder agent dissolving device has a solution supplying section which is supplied by flowing a solution into a dissolving tank having a lid member, and a powder agent supplying section which is supplied by dropping a powder agent, A configuration is adopted in which a predetermined amount of the dissolution liquid is supplied to the dissolution tank by the dissolution liquid supply unit, and then the powder agent is supplied to the dissolution tank by the powder agent supply unit. Therefore, it seems that a liquid having a desired concentration can be obtained by controlling the amount of powder and the amount of solution.

[0003]

However, when the powder agent dissolving device having the above-mentioned configuration is adopted, the powder agent is dropped and supplied after the solution is supplied into the dissolution tank. Due to the force of the agent falling, part of the already-dissolved solution is scattered and / or part of the dropped powder agent is scattered and adheres to the inner surface of the dissolution tank and the lower surface of the lid member. Probability is high. Of these, the powder agent attached to a relatively low position on the inner surface of the dissolution tank is not inconvenient because it is dissolved by the supply of the solution, but the powder agent attached to a relatively high position on the dissolution tank. The powder agent attached to the lower surface of the lid member remains undissolved because it is located above the liquid surface of the solution even if the solution is supplied. As a result, even if the amounts of the powder agent and the solution are accurately controlled, it is not possible to obtain a liquid having a desired concentration.

Further, the inside of the dissolution tank is cleaned by supplying the cleaning solution into the dissolution tank and causing it to overflow from a cleaning solution overflow outlet provided at a predetermined position near the upper portion of the dissolution tank (a predetermined position below the lower surface of the lid member). Even when performing the above, since the lower surface of the lid member is not cleaned, the powder agent attached to the lower surface of the lid member remains as it is. Therefore, it becomes impossible to clean the entire area of the inner surface of the dissolution tank, and when other types of powder agents are being dissolved, the powder agent attached to the lower surface of the lid member falls off. There is a possibility that it will end up. In this case, it becomes impossible to obtain a liquid having a desired concentration and a desired composition.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is a first object of the present invention to provide a powder agent dissolving apparatus and method capable of reliably preventing the powder agent from scattering. A second object of the present invention is to provide a powder agent dissolving device capable of reliably cleaning the entire inner surface of the powder agent.

[0006]

According to a first aspect of the present invention, there is provided a dissolution apparatus for a powder agent, wherein a dissolution liquid supply means is provided at a predetermined position below a dissolution tank for dissolving the powder agent, and an upper portion of the dissolution tank is provided. It has a powder agent supplying means for supplying the powder agent to the dissolving tank through a predetermined position of the covering lid member, and further, after the powder agent is supplied from the powder agent supplying means to the dissolving tank through the powder agent supplying means. It has a control means for controlling both the means so that the solution is supplied by the solution supply means.

According to a second aspect of the present invention, there is provided a powder agent dissolving apparatus, wherein the dissolving tank has a cleaning liquid overflow outlet at a predetermined position near the upper portion and a cleaning liquid supply means at a predetermined position below the cleaning liquid overflow outlet. The lid member has a lower surface located below the cleaning liquid overflow outlet, and has a cleaning liquid flow path that connects the inside of the dissolution tank with the cleaning liquid overflow outlet.

According to a third aspect of the present invention, the powdery agent dissolving apparatus employs the dissolving solution supplying means also serving as the cleaning solution supplying means. However, it is not necessary that the entire range of the dissolution liquid supply means also serves as the cleaning liquid supply means, as long as the predetermined downstream side of the dissolution liquid supply means also serves as the predetermined downstream side range of the cleaning liquid supply means. The method for dissolving a powder agent according to claim 4, wherein a predetermined amount of the powder agent is supplied to a dissolving tank for dissolving the powder agent, and then a predetermined amount of the solution is determined based on the amount of the powder agent and the dilution ratio. It is a method of supplying powder from a predetermined position underneath to dissolve the powder agent.

[0009]

According to the dissolution apparatus of the powder agent of claim 1, the dissolution liquid supply means is provided at a predetermined position below the dissolution tank for dissolving the powder agent, and the lid member for covering the upper portion of the dissolution tank is provided. It has a powder agent supply means for supplying the powder agent to the dissolution tank through a predetermined position, and further, after the powder agent is supplied from the powder agent supply means to the dissolution tank through the powder agent supply means, the solution is supplied. Since it has a control means for controlling both of the above means so that the solution is supplied by the means, unlike the conventional device which supplies the solution by flowing down the solution after supplying the powder, It is possible to supply a predetermined amount of solution without scattering. As a result, the entire amount of the powder agent supplied can be dissolved in the entire amount of the solution, and a liquid having a desired concentration can be obtained by accurately controlling the amount of the powder agent and the amount of the solution.

In the powder agent dissolving apparatus of claim 2, the dissolving tank has a cleaning liquid overflow outlet at a predetermined position near the upper portion, and a cleaning liquid supply means is provided at a predetermined position below the cleaning liquid overflow outlet. In addition to having a lower surface located below the cleaning liquid overflow outlet as the lid member,
Since the one having a cleaning liquid flow path that connects the inside of the dissolution tank with the cleaning liquid overflow outlet is adopted, the cleaning liquid is supplied by the cleaning liquid supply means to clean the entire inner surface of the dissolution tank including the lower surface of the lid member. be able to.

According to the powdery agent dissolution apparatus of claim 3, since the dissolution solution supply means also serves as the cleaning solution supply means, the dissolution solution supply means and the cleaning solution supply means are provided separately. The configuration can be simplified in comparison. According to the method of dissolving a powder agent of claim 4, after supplying a predetermined amount of the powder agent to a dissolution tank for dissolving the powder agent, a predetermined amount of the solution is determined based on the amount of the powder agent and the dilution ratio. Since the powder agent is supplied from a predetermined position below the dissolution tank to dissolve the powder agent, unlike the conventional method in which the powder solution is supplied and then the dissolution liquid is made to flow down, a predetermined amount of the powder agent is dissolved without being scattered. A liquid can be supplied. As a result, the entire amount of the powder agent supplied can be dissolved in the entire amount of the solution, and a liquid having a desired concentration can be obtained by accurately controlling the amount of the powder agent and the amount of the solution.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 1 is a schematic view showing an embodiment of a powder agent dissolving apparatus of the present invention. This dissolution apparatus includes a dissolution tank 1, a storage tank 2, a dissolution liquid supply pipe 11 for supplying a dissolution liquid to the dissolution tank 1 (which constitutes a part of the dissolution liquid supply means), and a powder agent feeder. 22, a hopper 12 for supplying a powder agent to the dissolution tank 1 (which constitutes a part of the powder agent supply means), and a transfer line 13 for supplying the liquid in the dissolution tank 1 to the storage tank 2. It has a liquid feed pump 21 for feeding the liquid in the storage tank 2 and a control unit 3 for controlling the supply of the dissolution liquid and the supply of the powder agent.

In the dissolution tank 1, a dissolution liquid supply pipeline 11 is connected to a predetermined position on the lower surface, and a cleaning liquid overflow outlet 14 is provided at a predetermined upper position. A lid member 15 is detachably provided so as to cover the upper opening. The lid member 15 has a lower surface 15 a located below the cleaning liquid overflow outlet 14 in the mounted state, and also has a cleaning liquid flow path 15 that communicates the inside of the dissolution tank 1 with the cleaning liquid overflow outlet 14.
b. Further, a stirring fan 16 for assisting the dissolution of the powder agent is provided, and a drive source 16a for operating the stirring fan 16 is provided at a predetermined position of the lid member 15. Further, an opening 15c for guiding the powder agent falling from the hopper 12 into the dissolution tank 1 is formed at a predetermined position of the lid member 15. Where the hopper 12
May be integrally formed with the lid member 15, but may be separately formed. An on-off valve (not shown) may be provided at a predetermined position of the hopper 12, but an on-off valve may be provided on the powder agent feeder on the upstream side of the hopper 12. Alternatively, a predetermined amount of powder agent may be supplied to the hopper 12 in a batch manner.

The dissolution liquid supply conduit 11 and the transfer liquid conduit 13 are integrated in a T shape, and are common to achieve the function as the dissolution liquid supply conduit 11 and the function as the transfer liquid conduit 13. The portion 11a is connected to a predetermined position on the lower surface of the melting tank 1. Then, the liquid transfer valve 1 for prohibiting or allowing liquid transfer to a portion that achieves only the function of the liquid transfer conduit 13.
3a is provided.

Although not shown in FIG. 1, the dissolution liquid supply pipeline 11 is connected to a dissolution liquid tank via a pump or the like, and further, a cleaning liquid tank is connected via a switching valve or a pump or the like. Is also connected. That is, a part of the dissolution liquid supply conduit 11 also serves as a part of the cleaning liquid supply conduit.
Further, in order to completely remove the cleaning liquid in the dissolution tank 1, a cleaning liquid discharge conduit is connected to a predetermined position of the dissolution liquid supply conduit 11 via a switching valve, a pump and the like. The cleaning liquid overflow outlet 14 is connected to a cleaning liquid recovery tank or the like.

The control unit 3 controls the driving source 16a so that the solution is supplied after the powder agent is supplied and then the stirring fan 16 is operated, and a microcomputer is used. It is composed of a control device and a relay circuit using a plurality of relays. Although not shown in FIG. 1, a sensor for detecting the liquid level when dissolving the powder agent is provided, and the liquid level when dissolving the powder agent is the lower surface 15 of the lid member 15.
The liquid level detection signal is supplied to the control unit 3 upon detecting that it has reached a predetermined position below a. Therefore, the control unit 3
Stops the supply of the solution and controls the amount of solution accurately.

The operation of the melting apparatus having the above structure is as follows. When the dissolution of the powder agent is instructed by operating a switch (not shown) or the like, the controller 3 operates the powder agent feeder 22 to supply a predetermined amount of the powder agent, and the hopper 1
2 to supply the powder agent to the dissolution tank 1 through 2 and then
A predetermined amount of dissolution liquid is supplied through the dissolution liquid supply pipe 11. In this case, the solution is not supplied by flowing down the powder agent from above, but is supplied from the lower surface of the dissolution tank 1, so that the solution is supplied without scattering the powder agent. be able to. Then, after the solution is supplied and the liquid surface reaches a predetermined position,
By stopping the supply of the solution and operating the stirring fan 16, the powder agent is dissolved and the obtained liquid is stirred. Therefore, it is possible to obtain a liquid having a concentration determined by the amount of powder and the amount of solution. The obtained liquid is guided to the storage tank 2 by opening the liquid transfer valve 13a and allowing liquid transfer through the liquid transfer conduit 13, and then taken out by the liquid transfer pump 21 as necessary.

When all the liquid in the dissolution tank 1 is transferred to the storage tank 2 and the cleaning of the dissolution tank 1 is instructed, the transfer valve 13a is closed and the dissolution tank 1 is passed through the dissolution solution supply pipe 11. Supply the cleaning liquid to the inside of the. In this case, since the supply of the cleaning liquid is continued even after the sensor detects the liquid surface, the inside of the dissolution tank 1 is filled with the cleaning liquid, and then the cleaning liquid flows out through the cleaning liquid overflow outlet 14. Therefore,
After confirming that the cleaning liquid has started to flow out from the cleaning liquid overflow outlet 14, the supply of the cleaning liquid is stopped and left as it is for a predetermined time, whereby the sterilization cleaning of the dissolution tank 1 can be performed. Of course, the sterilization cleaning of the dissolution tank can be performed even if the supply of the cleaning liquid is continued. In any case, the entire inner surface of the dissolution tank 1 including the lower surface 15a of the lid member 15 can be sterilized and cleaned. And dissolution tank 1
After sterilizing and cleaning the inside of the vessel, the dissolution liquid supply pipe line 11
The cleaning solution is completely discharged through the preparation for the next dissolution treatment of the powder agent.

In the above description, the case where the dissolution liquid supply conduit 11 also serves as the cleaning liquid supply conduit and a part of the transfer liquid conduit 13 has been described. However, the dissolution liquid supply conduit 11 has only the cleaning liquid supply conduit. Of course, the dissolution liquid supply pipe line 11, the cleaning liquid supply pipe line, the liquid transfer pipe line 13, and the cleaning liquid discharge pipe line may be provided independently of each other.

[0020]

According to the first aspect of the present invention, unlike the conventional apparatus in which the powder solution is supplied and then the solution is made to flow down, a predetermined amount of the solution can be supplied without scattering the powder agent. As a result, it is possible to dissolve the entire amount of the supplied powder agent in the total amount of the solution, and by accurately controlling the amount of the powder agent and the amount of the solution, it is possible to obtain a liquid having a desired concentration. There is a unique effect.

The invention of claim 2 has a peculiar effect that the entire inner surface of the dissolution tank including the lower surface of the lid member can be cleaned by supplying the cleaning solution by the cleaning solution supply means. The invention of claim 3 has a unique effect that the configuration can be simplified as compared with the case where the dissolving liquid supply means and the cleaning liquid supply means are separately provided.

According to the fourth aspect of the present invention, unlike the conventional method of supplying the powder agent by flowing down the solution after supplying the powder agent, a predetermined amount of the solution can be supplied without scattering the powder agent. As a result, it is possible to dissolve the entire amount of the supplied powder agent in the entire amount of the dissolution liquid, and it is possible to obtain a liquid having a desired concentration by accurately controlling the amounts of the powder agent and the dissolution liquid. Produce the effect of.

[Brief description of drawings]

FIG. 1 is a schematic view showing one embodiment of a powder agent dissolving apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Dissolution tank 3 Control part 11 Dissolution liquid supply line 12 Hopper 14 Cleaning liquid overflow outlet 15 Lid member 15a Lower surface 15b Cleaning liquid flow path 22 Powder agent feeder

Claims (4)

[Claims] 1. A dissolving tank (1) for dissolving a powder agent.
A powder agent for supplying a powder agent to the dissolution tank (1) through a predetermined position of a lid member (15) covering the upper portion of the dissolution tank (1) while having a dissolution liquid supply means (11) at a predetermined position below It has a supply means (12), and moreover, after the powder agent is supplied from the powder agent supply means (22) through the powder agent supply means (12) to the dissolution tank (1), the solution is supplied. A dissolution apparatus for a powder agent, comprising a control means (3) for controlling both the means (11) and (22) so that the solution is supplied by the means (11). 2. The dissolution tank (1) has a cleaning liquid overflow outlet (14) at a predetermined position near the upper part, and a cleaning liquid supply means (11) at a predetermined position below the cleaning liquid overflow outlet (14). In addition, the lid member (15) has a lower surface (15a) located below the cleaning liquid overflow outlet (14), and the inside of the dissolution tank (1) and the cleaning liquid overflow outlet (14). The dissolution apparatus for a powder agent according to claim 1, further comprising a cleaning liquid flow path (15b) communicating with the. 3. The apparatus for dissolving a powder agent according to claim 2, wherein the dissolution liquid supply means (11) also serves as a cleaning liquid supply means (11). 4. A dissolution tank (1) for dissolving a powder agent.
After supplying a predetermined amount of the powder agent to the container, a predetermined amount of a dissolution liquid determined based on the amount of the powder agent and the dilution ratio is supplied from a predetermined position below the dissolution tank (1) to dissolve the powder agent. A method for dissolving a powder agent.