JP2009172584A - Chemical dissolution device and chemical supply apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chemical dissolution device capable of dissolving a chemical in water to manufacture a chemical solution of constant concentration, and to provide a chemical supply apparatus capable of supplying the chemical solution of constant concentration. <P>SOLUTION: The chemical dissolution device includes: a chemical charging container; a chemical dissolution device body capable of storing the chemical solution; a supply tube for supplying water to the chemical dissolution device body from the outside; a discharge tube for discharging the chemical solution to the outside from the chemical dissolution device body. The chemical charging container is provided on the upper part of the chemical dissolution device body, the inside of the chemical charging container is communicated with the inside of the chemical dissolution container body, solid chemicals are aligned in the vertical direction to be charged inside the chemical charging container. The outlet of the supply tube is mounted upward inside the chemical dissolution container body to be disposed so that water discharged from the outlet of the supply tube contacts with the solid chemical charged inside the chemical charging container, thereby the chemical is dissolved by water in contact with the solid chemical, thereby obtaining the chemical solution. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a drug dissolver and a chemical solution supply apparatus. More specifically, the present invention relates to a drug dissolver capable of producing a constant concentration chemical solution by dissolving the drug with water and a chemical solution supply apparatus capable of supplying a constant concentration chemical solution.

  Water such as domestic wastewater, industrial wastewater, pool circulating water, and bathhouse circulating hot water is sterilized using a chlorinating agent such as calcium hypochlorite and trichloroisocyanuric acid, and discharged or circulated. In this treatment, in order to effectively disinfect bacteria with water, it is required to quantitatively dissolve a chemical such as a chlorinating agent in water.

As an apparatus for dissolving a drug in water, for example, Patent Document 1 has a soluble material chamber to which water is supplied from the outside, and a discharge port provided in the lower portion thereof, from the upper side to the lower side of the soluble material chamber. There is described a chemical agent supply apparatus having a mechanism in which a soluble material is arranged and the supply of water from the outside is adjusted to raise and lower the liquid level in the soluble material chamber to periodically contact the soluble material.
Patent Document 2 includes a collection reservoir, an erosion reservoir provided thereon, and a canister that contains a drug provided thereon, and water is supplied into the erosion reservoir to overflow the erosion reservoir. The collected water flows into the collection reservoir and is discharged to the outside from the collection reservoir. The lower part of the drug element contained in the canister comes into contact with the water in the erosion reservoir, and the drug element is eroded and dissolved. A feeding device is disclosed. This drug element is moved downward by its own weight as dissolution erosion proceeds.
However, in the devices of Patent Document 1 and Patent Document 2, since the solid medicine is constantly or periodically immersed in water, the solid medicine easily swells, its shape collapses due to its own weight, and the contact area with water increases. In some cases, the drug was excessively dissolved.
Japanese National Patent Publication No. 4-500171 JP-T 6-501418

In Patent Document 3, a large number of chlorinated drugs that are tablet-molded into a vertical medicine cylinder are filled, water is sprayed from the upper part of the medicine cylinder, and the water is allowed to flow down along the surface of the chlorinating agent. A melting device is described which is configured to take off.
However, in the apparatus of Patent Document 3, since the contact area between the tableted chlorine agent and water decreases as the chlorine agent dissolves, it is difficult to supply a chemical solution with a constant concentration.
Japanese Patent Publication No.59-13890

Patent Document 4 consists of a drug dissolution tank whose interior is divided into an upper layer and a lower layer by an eye plate. The solid drug is randomly filled in the upper layer, and water is supplied from a nozzle that sprays upward to dissolve the solid drug. The drug dissolution water is stored in the lower layer and can be drained by a pump from the bottom of the drug dissolution tank, and the level of the stored drug dissolution water is below the eye plate. .
Although this apparatus can obtain a drug solution having a constant concentration, a solid drug bridge may be formed in the packed bed of the solid drug. When such a bridge is formed, since the solid medicine does not fall into the range where the spray water reaches, a state in which the medicine does not dissolve at all occurs.
JP-A-8-155465

  The objective of this invention is providing the chemical | medical solution dissolver which can manufacture a chemical | medical solution with a fixed density | concentration by melt | dissolving a chemical | medical agent with water, and the chemical | medical solution supply apparatus which can supply a chemical | medical solution of a fixed density | concentration.

  As a result of diligent studies to achieve the above object, the present inventor loaded solid drugs in a vertical direction and sprayed water upward on the lower part of the solid drug, so that the lower solid drug was dissolved and eroded. It was also found that the upper solid drug moved downward without the formation of a bridge with the dissolution and erosion of the lower solid drug, and that a certain amount of drug could be dissolved. The present invention has been completed as a result of further studies based on this finding.

That is, the present invention includes the following aspects.
(1) A drug loading container, a drug dissolver body that can store a drug solution, a supply pipe that supplies water from the outside to the drug dissolver body, and a discharge pipe that discharges the drug solution from the drug dissolver body to the outside. And
The drug loading container is provided in the upper part of the drug dissolver main body, and the inside of the drug loading container and the drug dissolver main body communicate with each other, and the solid drug is arranged side by side in the drug loading container in the vertical direction. And
The outlet of the supply pipe is attached upward in the drug dissolver body, and the water ejected from the outlet of the supply pipe is arranged so as to touch the solid medicine loaded in the medicine loading container. A drug dissolver that dissolves the drug with water to obtain a drug solution.
(2) The drug dissolver described above, wherein the liquid level of the drug solution stored in the drug dissolver body is maintained at a position lower than the supply pipe outlet.
(3) The drug dissolver, wherein the discharge pipe is attached at a position where the inlet is lower than the supply pipe outlet and as low as possible in the drug dissolver body.
(4) The drug dissolver described above, wherein a discharge pipe serving also as a discharge pipe and / or a drain pipe is attached to the bottom of the drug dissolver body.

(5) It has the drug dissolver and the main pipe, the supply pipe of the drug dissolver is branched from the upstream part of the main pipe, and the discharge pipe of the drug dissolver joins the downstream part of the main pipe A chemical supply device.
(6) The said chemical | medical solution supply apparatus with which the filtration apparatus is attached in parallel with the chemical | medical agent dissolver between the upstream part of the main piping, and the downstream part of the main piping.
(7) The said chemical | medical solution supply apparatus with which the valve controlled to open and close by the signal from the means to measure the chemical | medical agent concentration in water and / or the means to measure time is attached to the supply pipe.
(8) The volume above the position of the discharge pipe inlet (V), the volume above the position of the supply pipe outlet (V ₁ ), and the maximum volume of the solid drug to be loaded (V _D ) are upstream of the main pipe. The relationship of (V−V _D ) / (1 + x) −V _D > V ₁ is satisfied in the operating temperature range of the drug dissolver with respect to the differential pressure x [atm] between the section and the downstream portion of the main pipe Chemical supply device.

According to the drug dissolver of the present invention, even if the lower solid drug dissolves and erodes, the shape does not collapse, and the upper solid drug sequentially moves downward as the lower solid drug dissolves and erodes. The drug can be dissolved.
Moreover, the chemical solution supply apparatus of the present invention attaches the drug dissolver of the present invention in the middle of the bypass path branched from the main pipe, dissolves a certain amount of drug in the water flowing through the bypass path, By joining the main pipe, a certain amount of chemical can be supplied to the water flowing through the main pipe.
In addition, when the supply of water from the supply pipe is interrupted (for example, when the valve is closed, etc.), the drug dissolver of the present invention substantially stops the dissolution of the solid drug. When the concentration of the chemical stored in the vessel main body does not increase and the supply of water from the supply pipe resumes (for example, when the valve is opened), the high concentration chemical is discharged from the dissolver. There is nothing. Therefore, the drug dissolver of the present invention can be suitably used in an apparatus that incorporates an on / off control device using a chlorine concentration sensor or an operation timer and adjusts the supply of a chemical solution.
The chemical dissolver and the chemical solution supply apparatus of the present invention are suitable for disinfecting bacteria such as domestic wastewater, industrial wastewater, pool circulating water, and bathhouse circulating hot water.

The present invention will be described below with reference to the drawings. However, the present invention is not limited to what is shown in the drawings, and includes those in which the shape and the like are changed within the spirit and scope of the present invention.
FIG. 1 is a diagram showing an embodiment of a drug dissolver of the present invention. FIG. 2 is a view showing an embodiment of the chemical liquid supply apparatus of the present invention. FIG. 3 is a conceptual diagram showing a state in which the solid medicine in the medicine barrel is dissolved and eroded. FIG. 4 is a diagram showing a range of volumes used for designing the chemical solution supply apparatus.
The drug dissolver S of the present invention includes a drug loading container 2, a drug dissolver body 1 capable of storing a drug solution, a supply pipe 3 for supplying water from the outside to the drug dissolver body, and a drug solution from the drug dissolver body. It has a discharge pipe 5 that discharges to the outside.

The drug loading container 2 is provided on the upper part of the drug dissolver body 1. The inside of the medicine loading container and the inside of the medicine dissolver main body communicate with each other.
Further, the medicine loading container 2 can be loaded with solid medicines arranged in the vertical direction. That is, the outer shape of the drug loading container is usually a cylinder or a square tube. The solid drug may be loaded into the drug loading container as it is. For example, as shown in FIG. 3, the solid drug molded in a column shape is loaded into a cylinder (medicine cylinder 8) whose bottom is closed by the eye plate 13. Then, the medicine cylinder can be inserted into the medicine loading container 2. In FIG. 1, a lid 14 that can be opened and closed is provided at the upper part of the medicine loading container 2 so that a solid medicine or a medicine cylinder loaded with the solid medicine can be inserted.

The shape of the solid drug can be a cylindrical shape, a prismatic shape, or the like depending on the internal shape of the drug loading container or the drug cylinder. The size of the solid drug is not limited as long as it can be loaded in the drug loading container in the vertical direction. However, when the lower solid drug was dissolved and eroded, the upper solid drug was kept in the vertical direction. It is preferable that the size is such that it can be moved downward sequentially. If the size of the solid medicine is too small compared to the inner dimensions of the medicine loading container or the medicine cylinder, the solid medicine stacked in the vertical direction may fall down and form a bridge. In addition, if the size of the solid medicine is the same as the inside size of the medicine loading container or medicine barrel, or if the gap between the inner wall of the medicine loading container or medicine cylinder and the solid medicine is small, the solid medicine swells slightly. As a result, the solid drug may be in close contact with the inner wall and difficult to move downward.
The kind of applicable solid medicine is not particularly limited. Examples thereof include inorganic chlorinating agents such as calcium hypochlorite, and organic chlorinating agents such as trichloroisocyanuric acid, dichloroisocyanuric acid, sodium dichloroisocyanurate, and potassium dichloroisocyanurate.

  The bottom of the drug loading container may be closed with an eye plate so that the solid drug loaded in the drug loading container does not fall into the drug dissolver body. When using the above-mentioned medicine cylinder, a medicine loading container is provided by providing a flange 12 or a wing larger than the inside dimension of the medicine loading container at the top of the medicine cylinder so that the medicine cylinder does not fall into the medicine dissolver body. The medicine cylinder may be fixed at the upper edge of the medicine, or an annular protrusion smaller than the outside diameter of the medicine cylinder is provided at the lower part of the medicine loading container, and the bottom of the medicine cylinder is placed on the protrusion. You may enable it to fix a medicine cylinder. In addition, a perforated plate, a slit plate, an expanded metal, a wire mesh, or the like is used for the eye plate.

The drug dissolver body is provided below the drug loading container and has a structure capable of storing a drug solution obtained by dissolving a solid drug. In addition, in the chemical | medical agent dissolver S shown in FIG. 1, the stand 9 which supports a chemical | medical agent dissolver main body is provided.
A supply tube 3, a discharge tube 5, and a drain tube (not shown) are attached to the drug dissolver body 1.

The supply pipe 3 is for supplying water from the outside to the drug dissolver body. The supply pipe outlet 4 is attached upward in the drug dissolver main body, and when water is supplied, the water is jetted upward. The supply pipe outlet 4 may be provided with an eye plate, a spray nozzle or the like so that the water to be sprayed is spread upward and sprayed or sprayed. In the present invention, it is particularly preferable to spray water upward in order to keep the amount of drug dissolved constant.
In the present invention, it is preferable to squirt the squirting water to a height at which it touches the solid medicine in the medicine loading container. Since the amount of drug dissolved is substantially proportional to the amount of water that has come into contact with the solid drug, for example, it is preferable to adjust the amount of jet water by providing a flow meter 10 or the like in the middle of the supply pipe. Although two supply pipe outlets are shown in FIG. 1, the present invention is not limited to this, and the number of supply pipe outlets can be selected as appropriate in accordance with the number and size of the drug loading containers.

  A part of the solid medicine that has come into contact with water ejected from the outlet of the supply pipe is dissolved by the water to become a chemical solution. The drug solution falls from the drug loading container into the drug dissolver body by gravity and is stored. As shown in FIG. 3A, the solid medicines are loaded in the medicine loading container in the vertical direction. Then, when the bottom of the solid medicine is dissolved and eroded by the jet water, the upper solid medicine sequentially moves downward and becomes in a state as shown in FIG. In the drug dissolver of the present invention, since the solid drug is not soaked in water, swelling of the solid drug is suppressed, and collapse and outflow of the drug due to swelling are prevented. In addition, since the solid drug sequentially moves downward, dissolution stop due to bridge formation can be prevented. In this way, the concentration of the chemical solution can be made constant.

  The discharge pipe 5 is for discharging the chemical solution from the drug dissolver body to the outside. The attachment position of the discharge pipe 5 is not particularly limited, but is usually a position where the inlet 6 of the discharge pipe 5 is lower than the outlet 4 of the supply pipe 3. Moreover, in order to suppress the pressure fluctuation in the container body and the abnormal rise in the liquid level of the chemical solution, it is preferable to attach the inlet 6 of the discharge pipe 5 to the lowest position of the drug dissolver body. For example, the inlet 6 of the discharge pipe 5 is attached at a position below half the height of the drug dissolver body.

In the present invention, it is preferable that the liquid level of the chemical stored in the drug dissolver body is maintained at a position lower than the supply pipe outlet 4. When the liquid level of the chemical liquid is higher than the supply pipe outlet 4, the upward jet height of water at the supply pipe outlet 4 is lowered, and there is a possibility that the solid drug is not sufficiently dissolved. The liquid level of the drug solution rises as the pressure in the drug dissolver body increases and as the solid drug dissolves. Therefore, it is preferable to provide the supply pipe outlet 4 at a position where the assumed maximum pressure is applied in the drug dissolver body and the liquid level of the chemical liquid assumed in the state where the solid drug is completely dissolved does not exceed the supply pipe outlet 4. .
That is, as shown in FIG. 4, the volume (V) above the position of the discharge pipe inlet 6 and the volume (V ₁ ) above the position of the supply pipe outlet 4 and the maximum volume (V _D ) of the solid drug to be loaded. ) With respect to the differential pressure x [atm] between the upstream portion of the main pipe and the downstream portion of the main pipe, in the operating temperature range of the drug dissolver, (V−V _D ) / (1 + x) −V _D > It is preferred to design the drug dissolver so that the V ₁ relationship is satisfied. The maximum volume (V _D ) of the solid drug to be loaded is the maximum value of the total volume of the solid drug that can be loaded into the drug loading container.

  For example, when 20 tablets of 125 cc are loaded per tablet with a design of an assumed maximum pressure of 0.2 MPa in a 50 L drug dissolver body, 50 L of the dissolver body at atmospheric pressure of about 0.1 MPa is loaded. It is assumed that the space is reduced to about 13.3 L, that is, water corresponding to a volume of about 36.7 L is increased, and the water level in the container body is increased. The supply pipe outlet 4 is provided so as to be above the liquid level of the chemical solution even when the assumed water level rise occurs.

  The drain tube is for discharging the drug solution from the drug dissolver body to the outside. During normal use of the drug dissolver, the drain tube is normally closed. Drain tube when the liquid level of the chemical solution in the drug dissolver body rises abnormally due to clogging of the discharge tube or excessive supply of water from the supply tube, or when the drug dissolver is about to overflow, or when cleaning the drug dissolver Can be opened to discharge chemicals to the outside. In the present invention, the drain pipe may be provided as necessary, and may also serve as the discharge pipe 5.

By connecting the supply pipe 3 of the drug dissolver to the upstream part 15 of the main pipe and the discharge pipe 5 of the drug dissolver to the downstream part 16 of the main pipe, a chemical solution supply apparatus can be configured.
The chemical solution supply apparatus of the present invention can be used for disinfecting various bacteria such as domestic wastewater, industrial wastewater, pool circulating water, and bathhouse circulating hot water. A valve and a flow meter can be provided in the middle of the supply pipe 3 and a pump can be provided in the middle of the discharge pipe 5 in order to adjust the amount of water flowing from the main pipe. The valve provided in the middle of the supply pipe 3 may be one that can be manually opened and closed, or from a means for measuring a chemical concentration (for example, chlorine concentration) in water or a means for measuring time. It may be one that can be controlled to open and close by a signal.

  In the chemical solution supply device of the present invention, as shown in FIG. 2, the filtration device F and the drug dissolver S can be attached in parallel between the upstream portion 15 of the main pipe and the downstream portion 16 of the main pipe. . When the head loss of the filtration device F is larger than the head loss of the drug dissolver S, the head loss Δp of the filtration device F allows the chemical solution from the drug dissolver to be provided in the middle of the discharge pipe 5 without providing a pump. It becomes possible to discharge.

  According to the drug dissolver and the chemical solution supply device of the present invention, the shape of the lower solid drug does not collapse even when the lower solid drug dissolves and erodes, and the upper solid drug moves sequentially downward as the lower solid drug dissolves and erodes. A certain amount of drug can be dissolved, and a constant concentration of drug solution can be stably supplied. In addition, when the supply of water from the supply pipe is interrupted (for example, when the valve is closed, etc.), the drug dissolver of the present invention substantially stops the dissolution of the solid drug. When the concentration of the chemical solution stored in the container body does not increase and the supply of water from the supply pipe resumes (for example, when the valve is opened), the high concentration chemical solution is discharged from the drug dissolver. There is nothing to do.

The figure which shows one embodiment of the chemical | medical agent dissolver of this invention. The figure which shows one embodiment of the chemical | medical solution supply apparatus of this invention. The conceptual diagram which shows a mode that the solid chemical | medical agent in a medicine cylinder melt | dissolves and erodes. The figure which shows the range of the volume used for design of a chemical | medical solution supply apparatus.

Explanation of symbols

1: Drug dissolver body 2: Drug loading container 3: Supply pipe 4: Supply pipe outlet 5: Discharge pipe 6: Discharge pipe inlet 8: Drug cylinder 9: Fixing base 10: Flowmeter F: Filtration device S: Drug dissolver pi: water pressure upstream of main pipe po: water pressure downstream of main pipe Δh: head difference between supply pipe outlet and discharge pipe inlet 11: solid drug

Claims (8)

A drug loading container, a drug dissolver body capable of storing a drug solution, a supply pipe for supplying water from the outside to the drug dissolver body, and a discharge pipe for discharging the drug solution from the drug dissolver body to the outside,
The drug loading container is provided in the upper part of the drug dissolver main body, and the inside of the drug loading container and the drug dissolver main body communicate with each other, and the solid drug is arranged side by side in the drug loading container in the vertical direction. And
The outlet of the supply pipe is attached upward in the drug dissolver body, and the water ejected from the outlet of the supply pipe is arranged so as to touch the solid medicine loaded in the medicine loading container. A drug dissolver that dissolves the drug with water to obtain a drug solution.   The drug dissolver according to claim 1, wherein the liquid level of the drug solution stored in the drug dissolver body is maintained at a position lower than the supply pipe outlet.   The drug dissolver according to claim 1 or 2, wherein the discharge pipe is attached at a position where the inlet is lower than the supply pipe outlet and below the half of the height of the drug dissolver body.   The drug dissolver according to any one of claims 1 to 3, wherein a discharge pipe that also serves as a discharge pipe and / or a drain pipe is attached to the bottom of the drug dissolver body. The drug dissolver according to any one of claims 1 to 4, and a main pipe,
The drug dissolver supply pipe is branched from the upstream part of the main pipe,
The chemical solution supply device, wherein the discharge pipe of the drug dissolver joins the downstream portion of the main pipe.   The chemical | medical solution supply apparatus of Claim 5 with which the filtration apparatus is attached in parallel with the chemical | medical agent dissolver between the upstream part of the main piping, and the downstream part of the main piping.   The chemical solution supply apparatus according to claim 5 or 6, wherein a valve that is controlled to be opened and closed by a signal from the means for measuring the drug concentration in water and / or the means for measuring time is attached to the supply pipe. The volume above the position of the discharge pipe inlet (V), the volume above the position of the supply pipe outlet (V ₁ ), and the maximum volume of the solid drug to be loaded (V _D ) The relationship of (V−V _D ) / (1 + x) −V _D > V ₁ is satisfied in the operating temperature range of the drug dissolver with respect to the differential pressure x [atm] with the downstream portion of the pipe. 8. The chemical solution supply device according to any one of 7 above.

Images