JP5870501B2 - Drug dissolution supply device - Google Patents

Description

  The present invention relates to a drug dissolution supply apparatus for supplying a drug aqueous solution by dissolving a solid drug in water, and more particularly to a drug dissolution supply apparatus suitable for dissolution supply of a chlorine-based drug.

  It has been widely practiced to add a chlorine-based chemical to a water system such as a cooling water system, a paper pulp process water system, a dust collection water system, a scrubber water system, and a pool to prevent damage caused by fungi and algae (for example, Patent Document 1).

  2. Description of the Related Art Conventionally, an upward flow type apparatus schematically shown in FIG. 2 is used as a drug dissolution supply apparatus for dissolving a solid drug in water and supplying it as a drug aqueous solution. Water is supplied from the pump 2 to the inlet 1 a at the bottom of the tank 1 containing the solid medicine A, and this water is brought into contact with the solid medicine A. The aqueous solution in which the solid medicine is dissolved flows out from the outlet 1b at the top of the tank 1 and is added to the aqueous system. In the upper part of the tank 1, a medicine replenishing port 1c is provided, and a lid 1d is attached in a watertight manner.

JP 2009-84163 A

  In the conventional drug dissolution and supply apparatus, when the amount of the solid drug A in the tank 1 is large, an aqueous solution having a high concentration is supplied, and when the amount of the solid drug decreases, the drug concentration of the aqueous solution gradually decreases.

  In the conventional drug dissolution and supply apparatus, when the solid drug is a chlorinated drug, if water is supplied into the tank 1, all the solid drugs A get wet with water. A reaction product gas of a chlorine chemical and residual moisture is generated from the surface of A, and a gas having a high chlorine component concentration is accumulated in the tank 1.

  Further, the lid 1d is watertightly attached to the replenishing port 1c and is difficult to open and close.

  An object of the present invention is to solve the above-mentioned conventional problems and to provide a drug dissolution supply apparatus capable of supplying a drug aqueous solution with a small drug concentration fluctuation. Another object of the present invention is to provide a drug dissolution and supply apparatus that can reduce the amount of generated gas when the solid drug is a chlorinated drug.

The drug dissolution supply device according to claim 1 is a drug dissolution supply device having a tank for storing a solid drug and a pump for supplying water into the tank. All of them are provided in the lower part of the tank, and are provided with a blower that is always operated when water is not flowing and the pump is stopped and introduces air into the tank.

  According to a second aspect of the present invention, there is provided the chemical dissolution supply apparatus according to the first aspect, wherein the inlet and the outlet are provided at the same level as the bottom of the tank.

A drug dissolution supply apparatus according to a third aspect is characterized in that, in the first or second aspect , water is supplied to the inflow port via a constant flow valve.

According to a fourth aspect of the present invention, there is provided the drug dissolution and supply device according to any one of the first to third aspects, wherein the solid drug is a chlorinated drug.

  In the drug dissolution supply apparatus of the present invention, the water inlet and the drug solution outlet are provided in the lower part of the tank, and water for dissolving the solid drug is passed only through the lower part of the tank. Only the solid drug present at the bottom comes into contact with water. For this reason, if the amount of water supply is kept constant, a substantially constant concentration of the aqueous drug solution is supplied.

  Moreover, in the chemical | medical agent melt | dissolution supply apparatus of this invention, since only the solid chemical | medical agent of the lower part of a tank will get wet with water, when the solid chemical | medical agent is a chlorinated chemical | medical agent, the quantity of the chlorinated gas generated after a water flow stop is small. If air is sent into the tank after the water flow is stopped, the solid drug is forcibly dried, so that the amount of chlorine-based gas generated is further reduced and the chlorine-based gas in the tank is purged with air.

It is sectional drawing of the chemical | medical agent melt | dissolution supply apparatus which concerns on embodiment of this invention. It is sectional drawing of the conventional chemical | medical agent melt | dissolution supply apparatus.

  Hereinafter, an embodiment will be described with reference to FIG.

The tank 3 has a water inflow port 3a on one side surface portion of the lower portion and a water outflow port 3b on the other side surface portion. In this embodiment, the inflow port 3 a and the outflow port 3 b are provided at the same level as the bottom of the tank 3. The inflow port 3a and the outflow port 3b are each provided with a mesh 4 for preventing the solid medicine A from flowing out. Water from the pump 2 can be introduced into the inflow port 3a through the constant flow valve 6.
In addition, since the amount of dissolution changes depending on the flow rate when the influent water directly hits the solid medicine, it is preferable to provide a baffle plate (not shown) at the inlet so that the inflow water does not directly hit the solid medicine.

  In the upper part of the tank 3, a replenishing port 3c for the solid medicine A is provided, and a lid 3d is detachably mounted. In addition, an air inlet 3 e is provided in the upper part of the tank 3 so that air from the blower 5 can be introduced into the tank 3.

  In the drug dissolution and supply apparatus configured as described above, when supplying the drug aqueous solution, the granular solid drug is stored in the tank 3, the pump 2 is operated, and water is passed through the tank 3. The water introduced into the tank 3 comes into contact with the lower solid drug A in the tank 3 and flows out from the outlet 3b as an aqueous solution in which the drug component is dissolved.

  Thus, in this medicine dissolution supply device, water for dissolving the solid medicine is passed through only the lower part of the tank 3, so that only the solid medicine A present in the lower part of the tank 3 comes into contact with water. For this reason, coupled with the fact that the amount of water supply is kept constant by the constant flow valve 6, a substantially constant concentration of the chemical aqueous solution is supplied from the outlet 3b.

  In addition, it is preferable to set it as the amount of inflow water from which the solid chemical | medical agent of 2 to 30% of the height of the tank 3 from the bottom part of the tank 3 and 4-10% or less contacts with water. Since the amount of water is affected by the size of the tank, the particle size of the solid medicine, etc., it is preferable to determine it in advance by experimentation. A constant flow valve 6 having this flow rate is employed.

  In this drug dissolution and supply apparatus, only the solid drug A at the lower part of the tank 3 is wetted with water. Therefore, when the solid drug is a chlorinated drug, the amount of chlorinated gas generated after stopping water flow is small. In particular, in this embodiment, since the outflow port 3b is at the same level as the bottom of the tank 1, drainage in the tank 3 is good and the solid medicine A is easy to dry.

  In this embodiment, after the pump 2 is stopped and the water flow is stopped, the blower 5 is operated to feed air into the tank 3. As a result, the wet solid drug A is forcibly dried, so that the amount of chlorine gas generated is further reduced and the chlorine gas in the tank is purged with air. The air introduced into the tank 3 may flow out from the outlet 3b or may be discharged out of the tank 3 through an exhaust port (not shown) provided separately from the outlet 3b. It is preferable that the blower 5 is always operated at the time of non-water passage stopped by the pump 2. Thereby, the inside of the tank 3 can always be air purged.

  In this embodiment, since water does not reach the upper part of the tank 3, the lid 3d does not need to be watertightly attached to the replenishing port 3c, and the lid 3d can be easily opened and closed.

  As the solid drug A, trichloroisocyanuric acid and the like are suitable, but not limited thereto.

1,3 tank 2 pump 4 mesh 5 blower 6 constant flow valve A solid medicine

Claims (4)

A vessel for accommodating the solid agent, the drug dissolution supply device having a pump for supplying water into the cistern, both the inlet and outlet of the drug solution in water cistern provided in the lower portion of the tank, the pump A chemical dissolution and supply apparatus, characterized in that a blower is provided which is always operated when water is not flowing and is introduced and air is introduced into the tank.   The chemical dissolution supply apparatus according to claim 1, wherein the inlet and the outlet are provided at the same level as the bottom of the tank.   3. The chemical dissolution supply apparatus according to claim 1, wherein water is supplied to the inlet through a constant flow valve.   4. The drug dissolution supply apparatus according to claim 1, wherein the solid drug is a chlorinated drug.

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