JP5826586B2 - Solid drug supply apparatus and solid drug supply method - Google Patents

Description

  The present invention relates to a solid drug supply device and a solid drug supply method.

  In the field of water treatment and the like, various solid drugs (bactericide, dispersant, anticorrosive, etc.) are used. As a conventional solid drug dissolving / supplying system, for example, an automatic dissolving machine for a polymer flocculant is known (for example, see Non-Patent Document 1).

  However, in such an apparatus, there is a possibility that the solid medicine and its solution come into contact with the operator when the solid medicine is replenished. Moreover, an automatic powder feeder, a stirrer, etc. are required and there exists a problem that an apparatus becomes large.

  For other solid drug dissolution and supply systems, a drug filling container filled with a solid drug is directly incorporated into the pipe (bypass pipe, etc.) of the water to be treated, and the water to be treated or a part of the water to be treated is supplied to it. Thus, a system is known in which a solid drug is dissolved and the (super) saturated solution is directly supplied to the water to be treated (see, for example, FIG. 1 of Patent Document 1).

  However, in these systems, when there are temperature fluctuations such as a decrease in the temperature of the water to be treated, the chemicals are supersaturated in the water to be treated, and the piping of the water to be treated (main piping, bypass piping, etc.) ) May become blocked. Moreover, it is difficult to adjust the chemical concentration in the water to be treated.

  Patent Document 2 also includes two or more supply bowls each containing solid chemicals that dissolve during liquid immersion to form a solution, and when one of the bowls is empty, from one supply bowl to the other. A dual solid chemical supply system is described that incorporates the function of automatically switching the solution of the solid chemical dissolved in the bowl.

  However, in such a system, since the solubility is adjusted by quantifying the solid drug and putting it into the solvent, the adjustment of the injection concentration is not easy or the apparatus becomes large. In addition, when dissolving a solid drug up to a saturated solution, adjustment of the injection concentration is relatively simple because the solution concentration is constant, but because of the saturated solution, there is a risk of poor injection due to precipitation of the solid drug, etc. .

  In the conventional solid drug supply system as described in Patent Document 1, the remaining amount of the solid drug in the drug-filled container is generally visually checked with a “view window” or the like. In some cases, visual confirmation is difficult, and in this case, there is a problem in grasping the remaining amount of the solid medicine.

  Moreover, in the conventional solid medicine supply system as described in Patent Document 1, when a plurality of medicine filling containers are arranged, the amount of solid medicine consumed in each medicine filling container varies. It is difficult to use up the solid drug without waste.

  Furthermore, in the conventional solid medicine supply system as described in Patent Document 1, when the liquid system to be treated and the solid medicine injection system are hermetically connected by piping or the like, there is a risk of backflow of the solution.

JP-A-10-235368 Japanese Patent No. 4130588

"Water treatment chemical handbook", Kenji Fujita, Gihodo Publishing, 4.2 (3) "Solid chemical dissolution equipment"

  An object of the present invention is to provide a solid drug supply device and a solid drug capable of finely adjusting a drug concentration in a liquid to be treated with a simple configuration, in which clogging of a pipe of the liquid to be treated due to precipitation of solids or the like is suppressed It is to provide a supply method.

The present invention includes at least one medicine filling container filled with a solid medicine, a solvent supply means for supplying a solvent into the medicine filling container in order to dissolve the solid medicine in the medicine filling container, and the solid A solution storage tank into which a solution in which a medicine is dissolved flows, a dilution solvent supply means for supplying a solvent for dilution to the solution storage tank in order to dilute the solution, and the dissolution in the solution storage tank Dilution solution supply means for supplying a diluted solution of the solution to the liquid system to be treated , wherein a plurality of the drug filling containers are arranged in series, and the drug filling container group arranged in series is passed during operation. a solid agent feeder Ru provided with a liquid passage direction reversing means for reversing the fluid direction.

  In the solid medicine supply device, the container of the medicine filling container is preferably made of a material that transmits light.

  Moreover, it is preferable that the solid medicine supply device includes a concentration measuring unit that measures the concentration of the solution flowing out of the medicine filling container.

  The solid drug supply device preferably includes a temperature measurement unit that measures the temperature of the solution, and a control unit that controls the dilution rate of the dilution solvent supply unit based on the measured temperature. .

The present invention also provides a solvent supply step of supplying a solvent into the drug filling container, and the solid drug is dissolved in order to dissolve the solid drug in at least one drug filling container filled with the solid drug. A diluting solvent supply step for supplying a diluting solvent to dilute the dissolved solution into the dissolved solution storage tank into which the dissolved solution flows, and a diluted solution of the dissolved solution in the dissolved solution storage tank to be treated liquid system look containing a dilution solution supply step of supplying, the drug filling container are arranged in a plurality in series, in the drug filling container group arranged in series, the liquid passing direction reversal process of reversing passed through direction during operation it is including solid agent supply method.

  In the solid medicine supply method, the container of the medicine filling container is preferably made of a material that transmits light.

  The solid medicine supply method preferably includes a concentration measurement step of measuring the concentration of the solution flowing out of the medicine filling container.

  In the solid drug supply method, it is preferable that the temperature of the solution is measured, and the dilution rate of the solution in the solution storage tank is controlled based on the measured temperature.

  In the present invention, with a simple configuration, the clogging of the pipe of the liquid to be treated due to precipitation of solids or the like is suppressed, and the chemical concentration in the liquid to be treated can be finely adjusted.

It is a schematic structure figure showing an example of a solid medicine supply device and a solid medicine supply method concerning an embodiment of the present invention. It is a schematic structure figure showing an example of a solid medicine supply method concerning an embodiment of the present invention. It is a schematic structure figure showing an example of a solid medicine supply method concerning an embodiment of the present invention.

  Embodiments of the present invention will be described below. This embodiment is an example for carrying out the present invention, and the present invention is not limited to this embodiment.

  FIG. 1 shows a schematic configuration of an example of a solid drug supply device according to an embodiment of the present invention, and the configuration will be described. The solid drug supply device 1 includes a solvent storage tank 10, at least one drug filling container 12, and a solution storage tank 14 opened to the atmosphere. In the example of FIG. 1, the medicine filling container 12 includes four medicine filling containers 12a, 12b, 12c, and 12d.

  In the solid drug supply device 1, the solvent line 16 is connected to the inlet of the solvent storage tank 10, and the outlet of the solvent storage tank 10 and the inlet of the drug filling container 12 a are connected by the solvent supply line 18 via the pump 32. Yes. The outlet of the medicine filling container 12a and the inlet of the medicine filling container 12b, the outlet of the medicine filling container 12b and the inlet of the medicine filling container 12c, the outlet of the medicine filling container 12c and the inlet of the medicine filling container 12d, and the outlet and outlet of the medicine filling container 12d. The inlets of the liquid storage tank 14 are connected by the solution lines 20a, 20b, 20c, and 20d, respectively. The outlet of the solvent storage tank 10 and the inlet of the solution storage tank 14 are connected by a dilution solvent line 22 via a pump 34. A diluted solution supply line 24 is connected to the outlet of the solution storage tank 14 via a pump 36. A concentration measuring device 28 as a concentration measuring means is installed at the concentration measuring point 26 in the dissolving liquid line 20. The solution storage tank 14 is provided with a temperature measuring device 30 as temperature measuring means. In the example of FIG. 1, the solvent storage tank 10, the pump 32, and the solvent supply line 18 function as solvent supply means, and the solvent storage tank 10, the pump 34, and the dilution solvent line 22 function as dilution solvent supply means, and a solution storage tank 14, the pump 36 and the diluted solution supply line 24 function as a diluted solution supply means.

  The operation of the solid medicine supply method and the solid medicine supply apparatus 1 according to this embodiment will be described. First, the solvent is stored in the solvent storage tank 10 from the solvent supply source through the solvent line 16. The solvent is sequentially supplied from the solvent storage tank 10 through the solvent supply line 18 by the pump 32 to the drug filling containers 12a, 12b, 12c, and 12d arranged in series, and the liquid is passed (solvent supply process). The solution flowing out from the terminal drug filling container 12 d is stored in the solution storage tank 14. A predetermined amount of dilution solvent is supplied from the solvent storage tank 10 to the dissolution liquid storage tank 14 through the dilution solvent line 22 by the pump 34, and the dissolution liquid is diluted to a predetermined concentration (dilution solvent supply step). A diluted solution diluted to a predetermined concentration is supplied from the solution storage tank 14 to the liquid system to be processed through the diluted solution supply line 24 by the pump 36 (diluted solution supplying step). A dilution solvent storage tank that stores the dilution solvent may be provided separately from the solvent storage tank 10, and a predetermined amount of the dilution solvent may be supplied from the dilution solvent storage tank to the solution storage tank 14 through the dilution solvent line.

  Filling a container with a solid drug and passing a solvent through the drug-filled container, or arranging a plurality of drug-filled containers in series and passing the solvent through a group of arranged drug-filled containers 12 Thus, a solution in which the drug is sufficiently dissolved in the solvent can be obtained from the container outlet at the end of the group of drug-filled containers 12 without performing an operation such as stirring. The obtained solution is stored in the solution storage tank 14, diluted to a predetermined concentration with a solvent for dilution, and the diluted solution diluted to the predetermined concentration is transferred from the solution storage tank 14 to the liquid system to be treated using the pump 36. Added. Thereby, the risk of precipitation due to supersaturation of the solution in the injection system of the liquid system to be processed can be reduced, and poor injection into the liquid system to be processed can be suppressed.

  According to the solid medicine supply method and the solid medicine supply apparatus according to the present embodiment, it is not necessary to use a stirrer or a powder feeder, and the apparatus can be operated with an apparatus having a simple configuration. In addition, since the drug-filled container is installed in an independent piping system different from the piping of the liquid to be treated (main piping, bypass piping, etc.) and the diluted solution is used, the piping of the liquid to be treated due to precipitation of solids, etc. It is possible to operate with reduced blockage and the like. Further, since the diluted solution is used instead of the saturated solution, the chemical concentration in the liquid to be treated can be finely adjusted. Furthermore, it is possible to suppress contact of the solid drug and its solution with the operator during maintenance such as replenishment of the solid drug.

  The solvent that passes through the drug filling container 12 is not particularly limited as long as it can dissolve the solid drug to be used. Examples of the solvent include water and organic solvents. As the solvent for dilution, the same solvent that is usually passed through the drug filling container 12 is used, but it may be different.

  The solvent is, for example, industrial water obtained in the field or, depending on circumstances, a liquid to be treated (treated water), a liquid to be treated (treated water), etc., and a solvent supply source (industrial water tap, liquid to be treated) Etc.) and the solid drug supply device according to the present embodiment must be connected. In this case, the solution storage tank 14 opened to the atmosphere between the “liquid system to be treated and the drug filling container group” is opened to the atmosphere. By providing the section, these can be “bordered” and the backflow of “the liquid system to be treated → the group of drug-filled containers” can be suppressed. Furthermore, if an air release section called the solvent storage tank 10 opened to the atmosphere is provided between the “solvent supply source and the drug filling container group”, these are “bordered” and called “drug filling container group → solvent supply source”. Backflow can be suppressed.

  The container for filling the solid drug is not particularly limited as long as it is a sealed container. For example, a cartridge type container, a cylinder type container, etc. are mentioned. By making the container filled with the solid medicine into a cartridge-type container, it is possible to greatly reduce the risk that an operator directly touches the medicine itself during maintenance or the like. As the cartridge type container, for example, a cylindrical container such as a cylindrical shape, a lid for sealing the container, an inlet provided in the container or the lid, and an outflow pipe connected to a filtration device such as a strainer A cartridge or the like that is connected to the outflow pipe and includes an outlet provided in the container or the lid can be used.

  The number of drug filling containers may be one or more, and is not particularly limited, but is preferably two or more in order to reduce the risk of overlooking “drug depletion” as described later.

  Moreover, it is preferable that the container filled with the solid medicine is made of a material that transmits light. Thereby, the residual amount of the solid medicine in the medicine filling container 12 can be easily grasped. For example, by irradiating light from the outside of the medicine filling container 12, the inside of the container can be seen through and the remaining amount of medicine in the medicine filling container 12 can be grasped visually. Examples of the material that transmits light include resins such as PE (polyethylene) and FRP (fiber reinforced plastic).

  “Solid medicine” includes powder, granule, tablet type and the like, and there are no particular restrictions on the shape, and refers to all medicines that are solid, for example, bactericides, dispersants, anticorrosives and the like. Examples of the solid drug include bactericides such as DBNPA (2,2-dibromo-3-nitrilopropionamide) and dispersants such as hexametaphosphoric acid. If a cartridge-type container filled with DBNPA or the like is used as a product form, the risk of direct contact of chemicals such as bactericides with the worker can be greatly reduced.

  Although there is no restriction | limiting in particular as the filling amount of the chemical | medical agent to a container, For example, what is necessary is just about less than the total weight of 30 kg which can be conveyed manually.

  The dilution ratio of the dissolution liquid in the dissolution liquid storage tank 14 may be appropriately set according to the type of the solid drug to be used and is not particularly limited. However, considering the precipitation risk, for example, the saturated concentration of the solid drug with respect to the solvent About 1/10 to 1/2.

  The dissolution liquid storage tank 14 may be provided with a filtering means such as a strainer in order to remove undissolved chemicals in the diluted solution.

  In the present embodiment, the temperature of the dissolution liquid in the dissolution liquid storage tank 14 is measured by the temperature measuring device 30, and the dilution rate of the dissolution liquid in the dissolution liquid storage tank 14 is controlled by a control means (not shown) based on the measured temperature. It is preferable. The dilution rate of the solution may be controlled, for example, by controlling the pump 34 provided in the dilution solvent line 22 from the solvent storage tank 10 or the like and adjusting the flow rate of the dilution solvent.

  Assuming that the solution flowing out from the drug filling container 12 is “saturated”, if the saturation solubility curve for the solvent of the solid drug as the solute is grasped in advance, the temperature of the drug in the solution is determined from the temperature of the solution. The concentration can be predicted. That is, since the concentration of the dissolved solution can be grasped based on the temperature of the dissolved solution, if the dilution rate of the dissolved solution is controlled based on the temperature of the dissolved solution, it is possible to obtain a “diluted solution” with little variation in concentration. If there is little variation in the concentration of the diluted solution, it is easy to adjust the concentration of the diluted solution added to the liquid system to be treated.

  In the present embodiment, it is preferable to measure the concentration of the solution flowing out from the drug filling container 12 (concentration measuring step). By measuring the concentration of the solution flowing out of the drug filling container 12 with the concentration measuring device 28, it is possible to confirm the presence or absence of the drug in the container on the upstream side of the drug filling container, and grasp the remaining amount of the drug. be able to.

  The concentration measuring device 28 is not particularly limited as long as it can measure the concentration of the dissolved solution. For example, a conductivity measuring device that measures the conductivity of the dissolved solution, TOC (total organic carbon). A measuring device, a pH measuring device, an ORP (oxidation reduction potential) measuring device, etc. are mentioned. Among these, it is preferable to measure conductivity from the viewpoint of operational measurement accuracy and the like.

  The position of the concentration measuring point 26 by the concentration measuring device 28 may be at least one point in the solution line 20.

  Moreover, in this embodiment, it is preferable that a plurality of drug filling containers 12 are arranged in series, and in the group of drug filling containers 12 arranged in series, the liquid passing direction is reversed during operation (liquid flowing direction reversing step). .

  At a concentration measurement point 26 installed at least at one point in the solution line 20 in the middle of the group of the drug filling containers 12, the remaining amount of the drug is grasped by the concentration measurement device 28, and at a certain concentration measurement point 26, the drug “ When it is determined that there is no remaining amount, it is determined that the medicine in the medicine filling container 12 on the upstream side of the concentration measurement point 26 is almost consumed, and it may be replaced with a new medicine filling container. Moreover, after replacing | exchanging with a new chemical | medical agent filling container, the liquid flow direction of a solvent may be reversed and operation | movement may be restarted. Thereby, the filled medicine can be used without waste, and the consumption of the medicine can be easily recognized.

  For example, as shown in FIG. 2, when a solvent is passed through a group of drug filling containers 12 arranged in series (in the example of FIG. 2, drug filling containers 12a, 12b, 12c, 12d), basically, upstream Dissolved from the drug in the drug container on the side and consumed. For this reason, the concentration measurement point 26 in the dissolution liquid line 20 in the middle of the group of the drug filling containers 12 (in the example of FIG. 2, it is installed in the dissolution liquid line 20b between the drug filling container 12b and the drug filling container 12c. In FIG. 2, if it is determined that there is no remaining amount of the medicine and it is found that there is no remaining amount, the inside of the medicine filling container 12 upstream of the concentration measuring point 26 (the medicine filling containers 12a and 12b in the example of FIG. 2) All can be determined as “no remaining amount”. In addition, since the drug filling container 12 (in the example of FIG. 2, the drug filling containers 12c and 12d in the example of FIG. 2) on the downstream side of the concentration measuring point 26 has a further time delay, The risk of overlooking “drug depletion” is reduced. For example, as shown in FIG. 3, the medicine filling container 12 determined to be “no remaining amount” (in the example of FIGS. 2 and 3, the medicine filling containers 12 a and 12 b) are all replaced with new ones. If the solvent flow direction is reversed (in the example of FIG. 3, the drug filling containers 12d → 12c → 12b → 12a), the concentration of the new drug filling containers (the drug filling containers 12a and 12b in the example of FIG. 3) is measured. Since it is arranged downstream of the point 26, the state that the remaining amount of the drug is “upstream from the concentration measurement point 26 <downstream from the concentration measurement point 26” is maintained, and the risk of overlooking “drug depletion” Is kept low. However, if the liquid flow direction is not reversed after replacement with a new drug-filled container, the remaining amount of the drug becomes “upstream from the concentration measurement point 26> downstream from the concentration measurement point 26”. When the “no remaining amount” is reached, the solid drug supply device as a whole may already be depleted, increasing the risk of overlooking the “drug depletion” as a whole solid drug supply device.

  The concentration measurement point 26 may be installed anywhere in the solution line 20 in the middle of the group of drug-filled containers 12, and is not particularly limited, but from the viewpoint of operational convenience, the drug-filled container 12. It is preferable to install in the middle dissolution liquid line 20 (in the example of FIGS. 1 to 3, the middle dissolution liquid line 20b of the four drug filling containers 12a, 12b, 12c, and 12d).

  Examples of the liquid flow direction reversing means include a line switching valve.

  In the example of FIGS. 1 to 3, four drug filling containers 12a, 12b, 12c, and 12d are connected in series. However, a plurality of drug filling containers are arranged on the circumference and the flow paths are switched, as if It may be a merry-go-round system that switches and sequentially controls the water flow order of each drug-filled container as in a merry-go-round.

  The treatment liquid system to which the solid medicine supply method and the solid medicine supply apparatus according to the present embodiment can be applied is not particularly limited as long as it is a system using a solid medicine, and includes, for example, a cooling water treatment system and waste water treatment. It can be applied to all types of water treatment systems such as water treatment systems, industrial water treatment systems, and pure water treatment systems. Further, for example, in the case of various water treatment systems including a membrane treatment such as an RO membrane (for example, about 0.75 MPa) having a relatively high pressure condition in the system, it is difficult to incorporate a solid drug supply device in the system. Therefore, the solid medicine supply method and the solid medicine supply apparatus according to the present embodiment provided with an air release section can be suitably applied.

  Hereinafter, although an example and a comparative example are given and the present invention is explained more concretely in detail, the present invention is not limited to the following examples.

<Example 1>
A solid DBNPA dilution solution was prepared using the solid drug supply apparatus of FIG. 1 and applied to the RO membrane system as a liquid system to be treated. Specifically, the following method was used.
(1) Four cylindrical drug filling containers (material: FRP) filled with 10 kg of solid DBNPA are arranged in series, and water is passed through the drug filling container as a solvent.
(2) The DBNPA solution flowing out from the outlet of the terminal drug filling container is stored in a DBNPA solution storage tank.
(3) Water as a solvent for dilution is supplied to the DBNPA solution storage tank and diluted twice.
(4) A 2-fold diluted DBNPA solution is poured into a pipe for supplying the liquid to be processed to the RO membrane with a chemical pump.
As a result, it was possible to finely adjust the chemical concentration in the liquid to be treated with a simple configuration, which suppresses the clogging of the pipes in the liquid to be treated due to the precipitation of solids.

<Comparative Example 1>
A bypass pipe was provided in a pipe for supplying the liquid to be processed to the RO membrane, and a drug-filled container was directly incorporated therein to prepare a diluted solution. Specifically, as in Example 1, a cylindrical drug filling container filled with 10 kg of solid DBNPA was incorporated. As a result, clogging of the pipe of the liquid system to be treated due to solid content precipitation, specifically, clogging of the strainer portion occurred. Moreover, the chemical concentration in the liquid to be treated could not be finely adjusted.

  DESCRIPTION OF SYMBOLS 1 Solid chemical | medical agent supply apparatus, 10 Solvent storage tank, 12, 12a, 12b, 12c, 12d Chemical filling container, 14 Dissolution liquid storage tank, 16 Solvent line, 18 Solvent supply line, 20, 20a, 20b, 20c, 20d Dissolution liquid line, 22 Dilution solvent line, 24 Dilution solution supply line, 26 Concentration measurement point, 28 Concentration measurement device, 30 Temperature measurement device, 32, 34, 36 Pump.

Claims (8)

At least one drug filling container filled with a solid drug;
A solvent supply means for supplying a solvent into the drug filling container to dissolve the solid drug in the drug filling container;
A solution storage tank into which a solution in which the solid medicine is dissolved flows;
In order to dilute the solution, a dilution solvent supply means for supplying a dilution solvent to the solution storage tank,
A diluted solution supply means for supplying a diluted solution of the dissolved solution in the dissolved solution storage tank to a liquid system to be treated;
Equipped with a,
The drug filling container are arranged in a plurality in series, in the drug filling container group arranged in series, solid agent supply device according to claim Rukoto comprises a liquid passage direction reversing means for reversing the passed through direction during operation. The solid drug supply device according to claim 1,
A solid medicine supply device, wherein the medicine filling container is made of a material that transmits light. The solid medicine supply device according to claim 1 or 2 ,
A solid drug supply device comprising a concentration measuring means for measuring the concentration of the solution flowing out of the drug filling container. It is a solid medicine supply device given in any 1 paragraph of Claims 1-3 ,
Temperature measuring means for measuring the temperature of the solution;
Control means for controlling the dilution factor by the dilution solvent supply means based on the measured temperature;
A solid drug supply device comprising: A solvent supply step of supplying a solvent into the drug-filled container in order to dissolve the solid drug in at least one drug-filled container filled with the solid drug;
A dilution solvent supply step of supplying a dilution solvent to dilute the solution into a solution storage tank into which the solution in which the solid drug is dissolved flows;
A diluted solution supplying step of supplying a diluted solution of the dissolved solution in the dissolved solution storage tank to the liquid system to be treated;
Only including,
The drug filling container are arranged in a plurality in series, in the drug filling container group arranged in series, solid agent supply method comprising including Mukoto the liquid passage direction reversal process of reversing passed through direction during operation. The solid drug supply method according to claim 5 ,
A solid drug supply method, wherein the container of the drug filling container is made of a material that transmits light. It is a solid medicine supply method according to claim 5 or 6 ,
A solid drug supply method comprising a concentration measurement step of measuring the concentration of the solution flowing out of the drug filling container. A solid drug supply method according to any one of claims 5-7,
A method of supplying a solid drug, wherein the temperature of the solution is measured, and the dilution rate of the solution in the solution storage tank is controlled based on the measured temperature.

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