JP4815697B2 - Drug dissolution supply device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drug dissolution and supply device for preparing a drug by adding a diluent to the drug, mixing and dissolving the drug, and supplying the drug to a place of use. In particular, the liquid polymer flocculant is predetermined with water. The present invention relates to a drug dissolution supply apparatus suitable as an apparatus for diluting to a concentration and injecting it into an agglomeration reaction tank or the like.
[0002]
[Prior art]
Various types of liquid polymer flocculants (polymers) are used in wastewater flocculation treatment and the like. In the chemical injection (addition to waste water) of this polymer, the polymer is diluted to a predetermined concentration with dilution water, and this is injected into the agglomeration reaction tank. Specifically, the polymer and dilution water are mixed and dissolved in the line by a line mixer, and the obtained chemical solution is injected. Since the chemical injection device using such a line mixer does not use a stirring tank for mixing and dissolving, the chemical injection device is compact and can be transported while preparing a chemical solution, so that chemical injection can be performed efficiently. it can.
[0003]
By the way, when diluting a polymer with dilution water, if the polymer concentration in the diluted chemical solution is excessively high, a polymer gel-like substance is generated in the chemical solution, and this gel-like substance is deposited in the line mixer or piping. To prevent smooth fluid delivery, and in severe cases, block the piping. In addition, it is difficult to obtain an accurate amount of chemical injection with a chemical solution in which such a gel-like substance is generated.
[0004]
Therefore, when the polymer is supplied after being diluted with dilution water by the drug dissolution and supply device, the polymer and the dilution water are usually mixed so that the concentration is not more than the following.
Cationic or amphoteric emulsion polymer: 1.0% by weight or less
Anionic emulsion polymer: 0.5% by weight or less
Cationic dispersion polymer: 3.0% by weight or less
Even if no gel-like substance is formed, if the polymer is not uniformly dissolved in the prepared chemical solution, the desired agglomeration effect cannot be obtained, and the dosage is increased or the agglomeration amount is increased. In order to cause defects, it is necessary to prepare a uniform chemical solution by sufficiently mixing the polymer with dilution water.
[0006]
[Problems to be solved by the invention]
In the conventional drug dissolution and supply device, when the supply amount of dilution water is reduced due to the water cut off of the dilution water supply source or the reduction of the feed water pressure, the concentration of the polymer in the chemical solution exceeds the above appropriate concentration, and the gel state Substances are generated and dissolution is uneven.
[0007]
In addition, due to a failure in the polymer supply system from the polymer storage tank or a shortage of the amount of polymer stored, the amount of polymer relative to the diluted water may be insufficient, and a chemical solution having a predetermined concentration may not be prepared.
[0008]
The present invention solves the above-mentioned conventional problems and prevents the formation of gel-like substances due to poor supply of diluents, fluctuations in chemical concentration due to poor supply of chemicals, etc., and stably supplies a chemical solution of a predetermined concentration It is an object of the present invention to provide a drug dissolution supply device that can be used.
[0009]
Another object of the present invention is to provide a drug dissolution and supply device that can sufficiently mix and dissolve a drug with a diluent to supply a uniform drug solution .
[0010]
[Means for Solving the Problems]
The drug dissolution supply apparatus of the present invention (Claim 1 ) is a drug dissolution supply apparatus for adding a diluent to a drug, mixing and dissolving the drug, dissolving the drug in the diluent, and supplying the obtained drug solution, Dissolution means having a mixing device provided in a plurality of stages so as to mix the dilution liquid and the drug a plurality of times, dilution liquid supply means for supplying the dilution liquid to the dissolution means, and supply of the drug to the dissolution means A drug dissolution and supply device comprising a drug supply means, wherein a mixing means provided with a pressurizing means for pressurizing the liquid is provided between the mixing devices provided in the plurality of stages, and the mixing is performed by the previous mixing apparatus. The liquid is pressurized by the pressurizing means, and further mixed by a subsequent mixing apparatus .
[0011]
Thus, by pressurizing the liquid between a plurality of mixing apparatuses, dissolution of the drug can be promoted, and a chemical liquid in which the drug is uniformly dissolved can be supplied.
[0012]
In the present invention, it is preferable to provide a circulating means for circulating a part of the chemical solution fed from the dissolving means to the introduction side of the dissolving means. Thereby, a chemical | medical agent can be dissolved more uniformly.
[0013]
In the present invention, it is preferable to provide a diluent pressurizing means for supplying the diluent under pressure before the dissolving means. This makes it possible to stabilize the chemical concentration even if the diluent flow rate is reduced.
[0014]
5. The drug dissolution supply apparatus according to claim 4, wherein the drug supply control controls the drug supply means based on the diluent supply amount of the diluent supply means, and the diluent based on the drug supply amount of the drug supply means. Control means for controlling either one or both of the diluent supply control for controlling the supply means is provided.
[0015]
In this drug dissolution supply apparatus, the drug supply means is controlled based on the diluent supply amount, or the drug is uniformly diluted by controlling the diluent supply means based on the drug supply amount. Can be reliably supplied.
[0016]
In this medicine dissolution and supply apparatus, in particular, a diluent measuring means for measuring the diluent supply amount and / or a medicine measuring means for measuring the medicine supply amount are provided, and the medicine supply means based on the measurement value measured by the measuring means. And / or it is preferable to control the dilution water supply means, whereby the chemical concentration can be further stabilized.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the drug dissolution and supply apparatus of the present invention will be described in detail.
[0018]
FIG. 1 is a system diagram showing an embodiment of the drug dissolution and supply apparatus of the present invention.
[0019]
In FIG. 1, a drug solution is prepared by mixing and dissolving a polymer as a drug with diluting water to prepare a drug solution and supplying the drug solution. In the present invention, the drug is not included in the polymer. It is not limited and may be other drugs. The solvent for diluting the drug is not limited to water, and may be an organic solvent, a mixed solution of an organic solvent and water, or a solution in which a solute is dissolved in these solvents.
[0020]
In FIG. 1, water supply such as tap water is introduced from a pipe 11. The water supply pipe 11 is provided with an open / close valve V ₁ and a flow meter 7. Reference numeral 1 denotes a polymer tank, which includes a liquid level meter 2. The polymer in the polymer tank 1 is injected from the pipe 12 into the water supply pipe 11. The polymer supply pipe 12 is provided with an on-off valve V ₂ and a polymer supply pump 3, and a check valve V ₃ for preventing a back flow of the chemical solution is provided near the connection portion of the pipe 12 to the pipe 11. Yes.
[0021]
The mixing and dissolving part is composed of line mixers (static mixers) 4 and 6 connected in series in two stages, and a line pump 5 provided between these line mixers 4 and 6. The polymer from 12 is introduced into the line mixer 4 and mixed, then pressurized by the line pump 5 in the pipe 13 and further mixed by the line mixer 6, and the chemical solution in which the polymer is uniformly dissolved and diluted is supplied from the pipe 14. It is injected into the place of use.
[0022]
A circulation line 15 is branched to the pipe 14, and a part of the chemical solution from the line mixer 6 is circulated to the inlet of the line mixer 4 through the circulation line 15. The circulation amount of the chemical solution and the injection amount to the place of use are adjusted by the opening degrees of the valves V ₄ and V ₅ .
[0023]
The diluting liquid pressurizing means is composed of a feed water pressurizing supply pump 16 provided in the feed water pipe 11 in the preceding stage of the mixing and dissolving section, pressurizing the feed water and supplying it to the mixing and dissolving section.
[0024]
The controller 10 receives the measured value of the liquid level meter 2 in the polymer tank 1 and the measured value of the flow meter 7 in the pipe 11. Further, based on these measurement results and the like, opening and closing of the opening and closing valve V _1, the operation of the polymer feed pump 3, operation and signal for controlling the operation of the water supply pressurized feed pump 16 of the line pump 5 outputs from the controller 10 Is done.
[0025]
In the controller 10, when the measured value of the flow meter 7 falls below a preset feed water flow rate, the feed water is pressurized by the interlock control or the feed water pressurizing supply pump 16 that stops the polymer supply pump 3 and stops the injection of the polymer. Take control. Note that hit the start of operation of the device, open the closing valve V _1, actuating the polymer feed pump 3 after the measured value of the flow meter 7 has reached the feed water flow rate set in advance. Further, the hitting a shutdown of the apparatus, the sequence control to stop the water supply by closing the opening and closing valve V ₁ after a lapse of a few minutes from seconds after stopping the operation of the polymer feed pump 3 is executed. When it is detected from the detection value of the liquid level meter 2 that the amount of polymer in the polymer tank 1 has become a predetermined amount or less, the controller 10 stops the operation of the apparatus or supplies the polymer. It is set to send a signal.
[0026]
Operating the device to the polymer is diluted supplied to the prepared place of use chemical, first, water is introduced from the pipe 11 open signal of the opening and closing valve V ₁ from the controller 10 is transmitted. At the same time, the operation signals of the line mixers 4 and 6 and the line pump 5 are transmitted.
[0027]
The measured value of the flow meter 7 reaches a predetermined value, and the amount of water supply in the pipe 11 is sufficient to dilute the polymer supplied from the polymer supply pump 3 to a concentration lower than the above-mentioned upper limit value of the appropriate dissolution concentration. After confirming that it has been reached, the controller 10 sends an operation signal for the polymer supply pump 3 to start injecting the polymer.
[0028]
The polymer injected from the pipe 12 is mixed by the line mixer 4 together with the feed water from the pipe 11 and the circulating chemical solution from the circulation line 15, and the mixed liquid is pressurized by the line pump 5 and further mixed by the line mixer 6. . A part of the chemical solution uniformly mixed and dissolved in this manner is circulated to the inlet of the line mixer 4 by the circulation line 15 and the remaining part is supplied from the pipe 14 to the place of use.
[0029]
As described above, the pressure of the mixed liquid mixed by the line mixer 4 is increased by the line pump 5 and further mixed by the line mixer 6, whereby the polymer injection pressure is increased and uniform mixing is possible. Further, by circulating the mixed chemical solution from the line mixer 6 to the inlet of the line mixer 4, it becomes possible to dissolve the polymer more uniformly. In this circulation, the circulation amount is controlled by the pressure applied by the line pump 5. It can be increased, and the effect of improving the uniform solubility by circulation can be further enhanced.
[0030]
Even during operation of such an apparatus, when the amount of water supply decreases due to a decrease in water supply pressure or water breakage, and the measured value of the flow meter 7 falls below a predetermined value, the controller 10 controls the polymer supply pump 3. A stop signal is emitted and the polymer injection is stopped.
[0031]
The predetermined value of the water supply amount is set as follows according to the upper limit value of the permissible dissolution concentration for each polymer.
Predetermined amount of water supply (minimum water supply flow rate: L / hr)
= {Polymer injection amount (L / hr)} / {Upper limit value of permissible dissolution concentration (% by weight)}
× 100
[0032]
After the polymer supply pump 3 is stopped, when the water supply amount is recovered and stabilized at a water supply amount equal to or higher than the predetermined value, an operation signal of the polymer supply pump 3 is transmitted and the polymer injection is resumed.
[0033]
When the measured value of the liquid level meter 2 falls below a predetermined value, the controller 10 sends a stop signal to the polymer supply pump 3 or sends a polymer replenishment signal to send the polymer to the polymer tank 1. Replenish.
[0034]
In stopping the operation of the apparatus, in order to prevent single injection of the polymer or high concentration of the polymer, the polymer supply pump 3 is first stopped, the injection of the polymer is stopped, and then the open / close valve V is stopped after several seconds to several minutes. Close ₁ and stop water supply.
[0035]
Thus, by controlling the water supply and the polymer injection, it is possible to reliably prevent the single injection of the polymer or the formation of a gel-like substance due to the shortage of the water supply amount. Further, by applying pressure between the line mixer 4 and the line mixer 6 with the line pump 5 and further circulating the chemical solution in the circulation line 15, it becomes possible to prepare a uniform chemical solution.
[0036]
By pressurizing with the feed water pressurization supply pump 16 of the feed water piping 11 and supplying to the line mixer 4, even if the feed water flow rate falls, it becomes possible to stabilize a chemical | medical solution density | concentration.
[0037]
The drug dissolution supply apparatus shown in FIG. 1 is an example of an embodiment of the drug dissolution supply apparatus according to the present invention, and the present invention is not limited to the illustrated one unless it exceeds the gist. Absent.
[0038]
For example, in the drug dissolution and supply apparatus of FIG. 1, a line mixer is connected in series in two stages, and a line pump is provided between these line mixers. However, the line mixer may be provided in two or more stages. What is necessary is just three steps or more. In this case, there is no particular limitation on the installation location and the number of installation of the line pump. Further, the pressure applied to the line pump is not particularly limited, and is appropriately determined according to the specifications of the line mixer, the type of medicine to be prepared, and the like. In a normal case, the total head is 5 to 25 m, preferably 10 to 20 m. It is said to be about. When the circulation line is provided, the amount of the circulating fluid is preferably about 0.1 to 2.0% of the amount of the chemical discharged from the final line mixer from the viewpoint of improvement of uniform solubility and processing efficiency.
[0039]
In addition to the line mixer, a batch melting method using a stirrer or the like can be used as the mixing apparatus. However, the present invention is particularly effective for an apparatus that performs mixing in a line, such as a line mixer.
[0040]
1 measures only the feed water flow rate and performs polymer injection control based on the feed water flow rate. The polymer feed pipe 12 is also provided with a flow meter, and this flow meter measurement is performed. Based on the value, the supply control of the feed water may be performed, or both the polymer injection control based on the feed water flow rate and the feed water supply control based on the polymer flow rate may be performed.
[0041]
That is, in general, the polymer is quantitatively injected by a constant flow pump, while the water supply pipe is connected to a water pipe or the like, so that the amount of polymer injection is stable, and only the water supply flow rate is reduced in water supply or water supply pressure. For this reason, the polymer concentration is often increased, and troubles in which a gel-like substance is generated often occur. For this reason, in the chemical dissolution supply apparatus of FIG. 1, only the feed water flow rate is measured, and polymer injection control is performed based on this result. However, a polymer flow rate measuring means is provided, and based on this measured value, the feed water supply is performed. Supply control may be performed. In addition, a water supply flow rate measurement unit and a polymer flow rate measurement unit are provided, and the polymer injection control based on the measurement value of the water supply flow rate and the supply control of the water supply based on the measurement value of the polymer flow rate are performed in combination. The concentration can be stabilized, and a chemical solution with even more uniform solubility can be supplied, which is preferable.
[0042]
【Effect of the invention】
As described in detail above , according to the medicine dissolution and supply device of claim 1, it is possible to supply a drug solution dissolved extremely uniformly.
[0043]
According to the medicine dissolution and supply device of the second aspect, it is possible to supply a chemical solution in which the medicine is further uniformly dissolved.
[0044]
According to the medicine dissolution and supply device of the third aspect, the chemical concentration can be stabilized even when the feed water pressure is lowered.
[0045]
According to drug dissolution supply device 請 Motomeko 4, product and this by feeding failure or pipe clogging of the high density portion and agglomerates of the drug gel-like substance or the like by the supply failure of the diluent, or drug supply failure of Therefore, it is possible to stably supply a chemical solution having a predetermined concentration.
[0046]
According to the medicine dissolution and supply device of the fifth aspect , the chemical concentration can be further stabilized .
[0047]
[Brief description of the drawings]
FIG. 1 is a system diagram showing an embodiment of a drug dissolution and supply apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Polymer tank 2 Liquid level meter 3 Polymer supply pump 4,6 Line mixer 5 Line pump 7 Flowmeter 10 Controller 16 Feed water pressurization supply pump

Claims (7)

A drug dissolution supply device for adding a diluent to a drug, mixing and dissolving the drug, dissolving the drug in the diluent, and supplying the obtained drug solution,
Dissolution means having a mixing device provided in a plurality of stages so as to mix the dilution liquid and the drug a plurality of times, dilution liquid supply means for supplying the dilution liquid to the dissolution means, and supply of the drug to the dissolution means In a drug dissolution supply device comprising a drug supply means,
A pressurizing means for pressurizing the liquid is provided between the mixing devices provided in the plurality of stages, and the mixed liquid mixed in the preceding mixing apparatus is pressurized by the pressurizing means and further mixed in the subsequent stage. A drug dissolution and supply device characterized by mixing with an apparatus. Oite to claim 1, drug dissolution supply device, wherein a portion of the chemical liquid fed from the dissolution unit provided with a circulating means for circulating the introduced side of the lysis unit. 3. The drug dissolution supply device according to claim 1 or 2 , further comprising a dilution liquid pressurizing unit for supplying a dilution liquid under pressure before the dissolution means. 4. The medicine supply control for controlling the medicine supply means based on the diluent supply amount of the diluent supply means and the medicine supply control of the medicine supply means according to claim 1. A drug dissolution supply apparatus comprising a control means for controlling one or both of dilution liquid supply control for controlling the dilution liquid supply means. 5. The method according to claim 4, further comprising: a diluent measurement unit for measuring a diluent supply amount and / or a drug measurement unit for measuring a drug supply amount, wherein the control unit is configured to measure the drug based on a measurement value measured by the measurement unit. A drug dissolution supply apparatus, characterized by controlling a supply means and / or a diluent supply means. 6. The dilution liquid measuring means for measuring the supply amount of the dilution liquid according to claim 4 or 5, wherein the control means reaches a preset flow rate when the operation of the apparatus is started. After that, the medicine dissolution and supply device is characterized in that the medicine supply pump of the medicine supply means is operated. 7. The control unit according to claim 4, wherein the control unit stops the supply of the diluent after a lapse of several seconds to several minutes after the operation of the drug supply pump of the drug supply unit is stopped. Drug dissolution supply device.

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