JP2014100643A - Reservoir feeding device and method of medicinal solution, and ground water clarification processor and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably feed medicinal solution while suppressing affection by ambient temperature and weather, and to thereby stably supply safe treatment water.SOLUTION: A reservoir feeding device 10 of medicinal solution includes: a reservoir tank 14 having a roof plate that covers the whole upper side; and a sub tank 16, a circulation pump 20, and a feed pump 22 that are intensively disposed on the roof plate. In the sub tank 16, a medicinal solution LM is fed from the reservoir tank 14 in full-time by the circulation pump 20. A quantity that exceeds a top edge of an overflow pipe 18 is returned to the reservoir tank 14, and thereby a liquid surface height of the medicinal solution LM is held constant. Thereby, lift of the feed pump 22 that feeds the medicinal solution LM from the sub tank 16 to an outside is kept constant, and a supply amount of the medicinal solution LM becomes stable. Therefore, while immersion of rain water or the like into the reservoir tank 14 is prevented by the roof plate, the medicinal solution LM can be stably fed, and safe treatment water can be stably supplied.

Description

  The present invention relates to a chemical liquid storage and supply apparatus, a groundwater purification treatment apparatus including the same, a chemical liquid storage and supply method, and a groundwater purification treatment method using the same.

  Conventionally, various water treatment according to the purpose is performed regardless of whether it is clean water or sewage. In particular, in recent years, the demand for groundwater has increased as a source of water that is not affected by disasters or weather. In a water treatment process for water to be treated such as ground water, a chemical solution suitable for the purpose is added to the water to be treated in order to remove or reduce impurities contained in the water to be treated. In general, the chemical solution is stored in a storage tank, and the chemical solution is added from the storage tank by a supply pump. At this time, in order to sufficiently remove or reduce impurities, it is necessary to stably add an optimal amount of chemical solution to the water to be treated. Therefore, the present inventors have previously filed an application regarding a chemical solution injection system in water treatment for the purpose of stably injecting a chemical solution (see Patent Document 1).

JP 2003-225651 A

  By the way, when considering using a commercially available chemical tank as a tank for storing a chemical solution to be added to the water to be treated, most of the commercially available chemical tanks having an internal volume of about 100 to 500 L are indoor specifications. Therefore, measures for temperature and rain when used outdoors are not fully implemented. When rainwater enters the chemical tank, not only is the chemical solution diluted, but various components in the rainwater react with the chemical solution and are contained as impurities in the chemical solution. Furthermore, in a commercially available chemical tank, fluctuations in the discharge amount of the supply pump due to a change in the head of the supply pump due to an increase or decrease in the amount of stored chemical liquid are generally not taken into account in the tank specifications. Specifically, when the liquid level in the chemical tank is higher, the supply pump head becomes smaller, so the supply amount of the chemical liquid increases, and when the liquid level in the chemical tank is lower, the lift height of the supply pump Increases the amount of chemical solution supplied. For this reason, the supply amount of the chemical solution fluctuates due to an increase or decrease in the chemical solution storage amount.

In addition, chemicals added to water to be treated, such as sodium hypochlorite, are widely used for disinfection of waterworks, groundwater beverage systems, pool water, etc., and suppress the occurrence of infectious diseases and various diseases around the world. Contributes as a chemical. In this way, if the concentration of chemicals used closely related to human life changes, causes a change in ingredients, or stops supplying, problems related to human health occur. There is a risk of it. For this reason, in the past, sufficient safety has been ensured by taking measures such as regularly conducting water quality inspections in a relatively short period of time.
This invention is made | formed in view of the said subject, The place made into the objective is supplying the chemical | medical solution stably, suppressing the influence by temperature and the weather, and supplying a safe treated water stably. It is in.

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.

  (1) A chemical liquid storage and supply device, a storage tank for storing chemical liquid, a sub-tank having an overflow pipe therein, a circulation pump for constantly supplying the chemical liquid in the storage tank to the sub-tank, A supply pump for supplying a chemical solution to the outside, and the storage tank includes a top plate that covers the entire upper surface, and the sub tank, the supply pump, and the circulation pump are disposed on the top plate. The overflow pipe is stored and supplied with the chemical solution that is installed through the top plate so that the upper end is disposed at a predetermined height inside the sub tank and the lower end is disposed inside the storage tank. Apparatus (claim 1).

  The chemical liquid storage and supply device described in this section includes a storage tank for storing the chemical liquid and a sub-tank having an overflow pipe inside, and the storage tank includes a top plate that covers the entire upper surface. A sub tank is arranged on the top board. For the top plate, for example, a resin plate is used. In addition, the chemical storage and supply device described in this section supplies a circulation pump that constantly supplies the chemical stored in the storage tank to the sub tank, and supplies the chemical in the sub tank to the outside of the chemical supply and supply device. These two pumps are also arranged on the top plate like the sub tank. As will be described later, these elements are arranged so as to be collected on the top plate, so that the storage tank is located immediately below the sub tank and the circulation pump. Further, the sub tank, the circulation pump, and the supply pump are arranged as close as possible on the top plate.

  The sub tank, the circulation pump, and the supply pump are collectively arranged at appropriate positions on the top board in consideration of the length of the pipe that communicates each element and the handling. At this time, a common base may be installed on a part of the top board, and these elements may be arranged on the common base. The circulation pump sucks the chemical solution from the storage tank arranged directly below through the piping installed through the top plate, and pipes the sucked chemical solution to the sub-tank arranged nearby. Supply through. In addition, the supply pump sucks the chemical solution from a sub-tank arranged in the vicinity through a pipe and supplies the sucked chemical solution to the outside through the pipe.

  The overflow pipe provided in the sub tank has an upper end disposed at a predetermined height inside the sub tank, and the other end as a lower end disposed inside the storage tank immediately below the sub tank. That is, the overflow pipe is installed through the bottom of the sub tank and the top plate, and the inside of the sub tank and the inside of the storage tank are in communication with each other through the overflow pipe. The height of the upper end of the overflow pipe inside the sub tank is such that the pipe for supplying the chemical liquid by the circulation pump is lower than the height connected to the sub tank and the pipe for sucking the chemical liquid by the supply pump. The height is set to be higher than the height connected to the sub tank. For this reason, in the sub tank, the chemical liquid that is constantly supplied by the supply pump flows into the overflow pipe from the upper end of the overflow pipe in an amount exceeding the predetermined height where the upper end of the overflow pipe is located, and the storage tank from the lower end of the overflow pipe Returned to the inside. As a result, even if the amount of stored chemical solution decreases due to the supply of chemical solution to the outside, or the amount of stored chemical solution increases due to replenishment of the chemical solution, the effect is limited to the increase or decrease of the chemical solution in the storage tank. The liquid level in the sub tank is always maintained at the same level as the predetermined height at which the upper end of the overflow pipe is located. And the chemical | medical solution will be supplied to the exterior by a supply pump from the sub tank with the constant amount of chemical | medical solutions stored.

  With the configuration as described above, the chemical liquid storage and supply device described in this section prevents the intrusion of rainwater or the like into the storage tank because the storage tank includes a top plate that covers the entire upper surface. . Further, since the sub tank, the circulation pump, and the supply pump are arranged on the top plate, the storage tank is located immediately below the circulation pump, and the sub tank and the supply pump are arranged close to each other. As a result, each of the piping for sucking the chemical liquid from the storage tank by the circulation pump and the piping for sucking the chemical liquid from the sub tank by the supply pump is short in length and laid by simple routing. It becomes. For this reason, it is difficult for gas generated from the chemical solution to be accumulated in each pipe, and it is possible to prevent the occurrence of gas lock, which is a problem particularly on the suction side of the pump. Furthermore, since the liquid level of the chemical liquid in the sub tank is always maintained at the same height as the position of the upper end of the overflow pipe, the head of the supply pump that sucks the chemical liquid from the sub tank is kept constant. The supply amount of the chemical solution becomes stable. Accordingly, the chemical solution can be supplied stably while suppressing the influence of temperature, weather, etc., and safe treatment water can be supplied stably by using this chemical solution storage and supply device for water treatment. Become.

  (2) In the above item (1), the top plate is provided with two short pipes having a flange portion at one end so as to pass through, and each of the two short tubes has the flange portion at the top. Close to the inner surface of the storage tank of the board, the other end protrudes a predetermined length from the outer surface of the storage tank of the top board, and from the storage tank by the lower end side of the overflow pipe and the circulation pump from the storage tank A chemical liquid storage and supply device inserted into each of the two short pipes.

  In the chemical liquid storage and supply device described in this section, two short pipes are erected through a top plate that covers the entire upper surface of the storage tank. Each of these two short pipes has a flange portion at one end, and the length excluding the flange portion is longer than the thickness of the top plate. One short pipe has an inner diameter equal to the outer diameter on the lower end side of the overflow pipe, and the other short pipe has an inner diameter equal to the outer diameter of the pipe for sucking the chemical from the storage tank by the circulation pump. have. For example, a valve socket made of vinyl chloride is used for these short pipes. Each of the two short pipes is inserted into a through hole having an inner diameter equal to the outer diameter of each short pipe provided on the top plate from the inside of the storage tank of the top plate, and the other end opposite to the flange portion. It is screwed in first. For this reason, a flange part closely_contact | adheres to the storage tank inner surface of a top plate, and the other end side becomes a mode which protruded predetermined length from the storage tank outer surface of the top plate. And between the outer periphery of the short tube and the inner periphery of the through hole provided in the top plate, and between the flange of the short tube and the storage tank inner surface of the top plate, for example, for vinyl chloride It is fixed with an adhesive or the like. Of the two short pipes erected on the top plate in this way, one of the short pipes is inserted with the lower end side of the overflow pipe projecting from the bottom part of the sub tank from the other end side opposite to the flange part. In the other short pipe, a pipe for sucking the chemical solution from the storage tank by a circulation pump is inserted from the other end side opposite to the flange portion.

  With the configuration as described above, the chemical solution storage and supply device described in this section is configured so that the other end of the short pipe opposite to the flange portion is the top plate even when rainwater or the like is accumulated on the top plate. Since it is at a position that is higher than the length that protrudes from the pipe, rainwater and so on can enter through the gap between the short pipe and the overflow pipe inserted into the short pipe, or the gap between the short pipe and the pipe inserted into the short pipe. It will prevent. Furthermore, the outer periphery of the short tube and the inner periphery of the through hole provided in the top plate and the flange portion of the short tube and the inner surface of the storage plate of the top plate are fixed with an adhesive or the like. Therefore, rainwater and the like can be prevented from entering through these gaps. Moreover, since the overflow pipe and the pipe for sucking the chemical solution from the storage tank by the circulation pump are inserted without being fixed to the short pipe, the pipe is pulled out from the short pipe as necessary. Etc. are easily performed.

(3) In the above paragraphs (1) and (2), a chemical liquid storage and supply device in which a cover that covers the entire sub-tank, the supply pump, and the circulation pump is installed on the top plate (claim). 3).
In the chemical liquid storage and supply apparatus described in this section, a cover that covers the entire sub-tank, supply pump, and circulation pump is installed on the top plate. As the cover, for example, a combination of a plate made of vinyl chloride and a bottomless box having a size sufficient to sufficiently cover the entire sub-tank, supply pump, and circulation pump is used. As a result, not only the sub tank, supply pump, and circulation pump, but also the piping for sucking the chemical from the storage tank by the circulation pump, the piping for supplying the chemical to the sub tank by the circulation pump, and the chemical from the sub tank by the supply pump Therefore, the lower end side of the overflow pipe projecting from the bottom of the sub tank and the like is covered with a cover, so that they are prevented from being directly exposed to wind and rain. In addition, the pipes for sucking the chemical solution from the storage tank by the circulation pump and the part passing through the top plate on the lower end side of the overflow pipe protruding from the bottom of the sub tank are also covered with the cover. It also prevents rainwater and the like from entering the storage tank through the gap between the penetrating locations.

(4) In the above items (1) to (3), a chemical liquid storage and supply device in which a copper pipe through which a refrigerant flows is wound around the outer periphery of the storage tank (claim 4).
In the chemical liquid storage and supply device described in this section, a copper pipe through which a refrigerant flows is wound around the outer periphery of the storage tank. Some chemical solutions stored in the storage tank have undesirable effects such as an increase in the reaction rate of oxidation or the like and an increase in the concentration of the reaction product when the temperature rises. For this reason, as described above, the copper pipe through which the refrigerant flows is wound around the outer periphery of the storage tank, so that the chemical stored in the storage tank is cooled and the It prevents temperature rise.

(5) The chemical liquid storage and supply apparatus according to (1) to (4) above, wherein a heat insulating material is provided on the outer periphery of the storage tank.
The chemical solution storage and supply device described in this section is to install a heat insulating material on the outer periphery of the storage tank. At this time, a heat insulating material cover may be further installed around the heat insulating material. Thereby, since the transmission of the atmospheric temperature to the storage tank is suppressed, the temperature rise of the chemical solution due to the influence of the air temperature is prevented. Further, when a copper pipe through which the refrigerant flows is wound around the outer periphery of the storage tank, a heat insulating material is installed so as to cover the copper pipe. Thereby, since the transmission of the atmospheric temperature to the storage tank cooled by the copper pipe is suppressed, the chemical liquid is efficiently cooled.

(6) Groundwater purification treatment apparatus comprising the chemical liquid storage and supply device according to any one of (1) to (5) above, wherein sodium hypochlorite is stored and supplied by the chemical liquid storage and supply apparatus (claim) Item 6).
The groundwater purification treatment apparatus described in this section includes the chemical liquid storage and supply apparatus described in any one of (1) to (5) above, and sodium hypochlorite is obtained by the chemical liquid storage and supply apparatus. Is stored and supplied. Therefore, while exhibiting the same effect as the chemical liquid storage and supply device described in the above (1) to (5), sodium hypochlorite is stably supplied to the groundwater to be treated, Groundwater will be provided.

(7) A groundwater purification treatment apparatus according to (6) above, comprising a raw water tank for storing groundwater pumped from a well, and wherein the groundwater in the raw water tank is circulated through the copper pipe (claim 7).
The groundwater purification treatment device described in this section includes a raw water tank that stores groundwater pumped from a well, and circulates the groundwater stored in the raw water tank through a copper pipe wound around the storage tank. Is. When circulating the groundwater to the copper pipe, for example, the groundwater is pumped from the raw water tank by a pump, supplied to one end of the copper pipe via the pipe, and groundwater via the pipe connected to the other end of the copper pipe. Will be returned to the raw tank. Generally, since the temperature of groundwater is about 12 to 18 ° C. throughout the year, it exhibits a sufficient effect as a refrigerant for cooling sodium hypochlorite in a storage tank. This eliminates the need for a dedicated facility for supplying the refrigerant flowing through the copper pipe, and prevents the temperature increase of sodium hypochlorite from existing facilities at low cost and efficiency. In addition, since the copper pipe wound around the storage tank is easily corroded by sodium hypochlorite, in the groundwater purification treatment device described in this section, sodium hypochlorite should be added to the groundwater in the raw water tank. First, sodium hypochlorite will be added to the groundwater pumped from the raw water tank for the subsequent process.

(8) The groundwater purification treatment apparatus according to (7), wherein the storage tank and the raw water tank are disposed close to each other (claim 8).
In the groundwater purification treatment apparatus described in this section, the length of a pipe for supplying groundwater from the raw water tank to the copper pipe is shortened because the storage tank and the raw water tank are disposed close to each other. For this reason, the temperature rise of groundwater by the influence of temperature etc. during passing through this piping is reduced, and sodium hypochlorite is cooled more effectively.

  (9) A method for storing and supplying chemical liquid, comprising a top plate that covers the entire upper surface, a storage tank for storing chemical liquid, a sub tank having an overflow pipe inside, and the chemical liquid in the storage tank to the sub tank Using a chemical liquid storage and supply device including a supply circulation pump and a supply pump for supplying the chemical solution in the sub tank to the outside, the sub tank, the supply pump, and the circulation pump are arranged on the top plate The chemical liquid is constantly supplied from the storage tank to the sub tank by the circulation pump, and a part of the chemical liquid in the sub tank is returned to the storage tank by the overflow pipe, whereby the liquid level of the chemical liquid in the sub tank is obtained. A chemical liquid storage and supply method for maintaining the height of the liquid at a predetermined height (claim 9).

(10) In the above item (9), the top plate is erected by passing through two short pipes having a flange portion at one end, and the flange portion of each of the two short tubes is connected to the top plate. The plate is brought into intimate contact with the inner surface of the storage tank, and the other end is protruded from the outer surface of the storage tank by a predetermined length. The chemical solution is discharged from the storage tank by the lower end of the overflow pipe and the circulation pump. A method for storing and supplying a chemical solution by inserting a pipe for sucking the liquid into each of the two short pipes (Claim 10).
(11) In the above items (9) and (10), a chemical liquid storage and supply device in which a cover that covers all of the sub-tank, the supply pump, and the circulation pump is installed on the top plate (claim 11). .

(12) In the above items (9) to (11), a chemical liquid storage and supply method in which a copper pipe having a coolant flowing therein is wound around the outer periphery of the storage tank (claim 12).
(13) In the above items (9) to (12), a chemical solution storage and supply method in which a heat insulating material is installed on the outer periphery of the storage tank (claim 13).
And the chemical | medical solution storage and supply method as described in (9) to (13) term is performed using the chemical | medical solution storage and supply apparatus as described in said (1) to (5) term, respectively ( The equivalent action corresponding to the items 1) to (5) is exhibited.

(14) Groundwater purification treatment method for storing and supplying sodium hypochlorite for addition to the groundwater to be purified by the chemical solution storage and supply method according to any one of (9) to (13) above (Claim 14).
(15) In the above item (14), a groundwater purification treatment method using a groundwater purification treatment apparatus including a raw water tank for storing groundwater pumped from a well and circulating the groundwater in the raw water tank through the copper pipe ( Claim 15).
(16) The groundwater purification treatment method according to (15), wherein the storage tank and the raw water tank are arranged close to each other (claim 16).
And the groundwater purification treatment method as described in (14) to (16) term is performed using the groundwater purification treatment apparatus as described in said (6) to (8) term, respectively, (6) To (8).

  Since this invention was comprised in this way, it becomes possible to supply safe treated water stably by supplying a chemical | medical solution stably, suppressing the influence by temperature and the weather.

It is a schematic diagram which shows typically the structure of the groundwater purification treatment apparatus provided with the chemical | medical solution storage and supply apparatus which concerns on embodiment of this invention. The structure of the storage tank of the chemical | medical solution storage supply apparatus which concerns on embodiment of this invention is shown, (a) is a top view of a storage tank, (b) is a front view of a storage tank. BRIEF DESCRIPTION OF THE DRAWINGS The structure arrange | positioned on the top plate of the chemical | medical solution storage and supply apparatus which concerns on embodiment of this invention is shown typically, (a) is a schematic diagram from the front, (b) is the side surface of a sub tank FIG. It is a schematic diagram which shows the storage tank in which the countermeasure against temperature was given of the chemical | medical solution storage supply apparatus which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, parts that are the same as or correspond to those in the prior art are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 1 is a schematic diagram showing a configuration of a groundwater purification treatment apparatus 12 including a chemical liquid storage and supply apparatus 10 according to an embodiment of the present invention. First, with reference to FIG. 1, the groundwater purification processing method by the groundwater purification processing apparatus 12 is demonstrated roughly. The groundwater purification treatment apparatus 12 pumps groundwater from the well 70 by the pumping pump 72 and puts it into the raw water tank 74. In the raw water tank 74, the pumped ground water is stored as raw water RW. The raw water RW is used to cool the storage tank 14 of the chemical storage and supply apparatus 10. The raw water RW is pumped up from the raw water tank 74 by the raw water pump 80 as treated water, and then sodium hypochlorite is added as the chemical liquid LM by the chemical liquid storage and supply device 10. Here, the cooling of the storage tank 14 using the raw water RW, the configuration of the chemical liquid storage and supply device 10, the storage and supply method of the chemical liquid LM, and the like will be described later. The treated water to which sodium hypochlorite has been added is filtered by the sand filtration tower 82, and further, a membrane filtration tower 84 composed of an MF membrane (microfiltration membrane), a UF membrane (ultrafiltration membrane) and the like. And then stored in the treated water tank 86. The treated water stored in the treated water tank 86 is transferred by a treated water pump 88 to a water receiving tank (not shown) via piping. By the process so far, the groundwater purification process by the groundwater purification apparatus 12 is completed.

  Next, the configuration of the chemical liquid storage and supply apparatus 10 according to the embodiment of the present invention will be described. As illustrated in FIG. 1, the chemical liquid storage and supply apparatus 10 includes a storage tank 14 that stores the chemical liquid LM (sodium hypochlorite in the example of FIG. 1). Here, an example of the structure of the storage tank 14 will be described with reference to FIG. As shown in the figure, the storage tank 14 includes a top plate 24 that covers the entire upper surface, and the top plate 24 is made of, for example, vinyl chloride and has a thickness of about 12 mm. The top plate 24 is provided with a screw-type lid 50 that can be opened and closed for maintenance of the storage tank 14 and replenishment of the chemical liquid LM to the storage tank 14. The storage tank 14 has a liquid level gauge 52 on the side surface. The liquid level gauge 52 indicates the position of the liquid level of the chemical liquid LM in the storage tank 14, whereby the remaining amount of the chemical liquid LM in the storage tank 14 can be visually confirmed. The storage tank 14 shown in FIG. 2 is a tank having a capacity of 500 L having a width and depth of 870 mm each in FIG. 2B and a height including the lid 50 of 980 mm. It is possible to use a tank having an appropriate shape and capacity according to the conditions.

  Moreover, the chemical | medical solution storage and supply apparatus 10 has the sub tank 16 which has the overflow pipe | tube 18, the circulation pump 20, and the supply pump 22, as shown in FIG. The circulation pump 20 always supplies the chemical liquid LM from the storage tank 14 to the sub tank 16, and a pipe 40 for sucking the chemical liquid LM from the storage tank 14 by the circulation pump 20 is laid down to the inside of the storage tank 14. ing. The lower part of the overflow pipe 18 of the sub tank 16 reaches the inside of the storage tank 14, and the chemical liquid LM in the sub tank 16 is returned to the storage tank 14 through the overflow pipe 18. Further, the supply pump 22 supplies the chemical liquid LM from the sub tank 16 to a pipe between the raw water pump 80 and the sand filtration tower 82 in the example of FIG. 1, and a pipe 46 for that purpose is laid. The sub tank 16, the circulation pump 20, and the supply pump 22 are disposed on the top plate 24 (see FIG. 2) of the storage tank 14. As an example, the effective capacity of the sub tank 16 is about 2L.

  Here, the structure on the top board 24 of the chemical | medical solution storage supply apparatus 10 which concerns on embodiment of this invention is demonstrated in detail. As shown in FIG. 3, the sub tank 16, the circulation pump 20, and the supply pump 22 are all arranged on a common base 26 made of, for example, vinyl chloride, which is installed on the top plate 24. Yes. For this reason, it becomes the aspect by which the storage tank 14 is arrange | positioned directly under these. The overflow pipe 18 of the sub tank 16 has an upper end disposed at a predetermined height X inside the sub tank 16, and penetrates the bottom of the sub tank 16 vertically downward from the overflow pipe 18 so as to stand upright on the top plate 24. A lower end portion is disposed above the inside of the storage tank 14 via the pipe 30. The short pipe 30 has a flange portion 30a, and the inner diameter is equal to the outer diameter of the overflow pipe 18. For example, a valve socket made of vinyl chloride or the like is used. Further, the short pipe 30 is screwed from the lower side in the drawing into a through hole provided in the top plate 24 and having an inner diameter equal to the outer diameter of the short pipe 30 with the flange portion 30a downward. Is located at a position higher than the upper surface of the top plate 24. And between the flange part 30a and the lower surface of the top plate 24, and between the outer periphery of the short tube 30 and the inner periphery of the through hole provided in the top plate 24, it is an adhesive for vinyl chloride. It is fixed with an agent. The overflow pipe 18 is inserted into the short pipe 30 from above in the figure, and is not fixed to the short pipe 30.

  A pipe 40 for sucking the chemical liquid LM from the storage tank 14 is connected to the suction side of the circulation pump 20, and the pipe 40 is connected to the above-described pipe via a short pipe 32 erected on the top plate 24. As described above, the storage tank 14 is laid down to the lower side (see FIG. 1). The short pipe 32 has an inner diameter equal to the outer diameter of the pipe 40 and has a flange portion 32a. Further, like the short pipe 30, the pipe 40 is fixed to the through hole provided in the top plate 24 by screwing from the lower side in the figure or the like, and the pipe 40 is inserted into the short pipe 32 without being fixed. Yes. On the other hand, a piping 42 for supplying the chemical liquid LM to the sub tank 16 is connected to the discharge side of the circulation pump 20, and the upper end of the overflow pipe 18 outside the sub tank 16 is disposed in the piping 42. It is connected above the predetermined height X.

  Further, a pipe 44 for sucking the chemical liquid LM from the sub tank 16 is connected to the suction side of the supply pump 22, and the pipe 44 is connected to a supply unit 16 a provided in the sub tank 16. The supply portion 16 a of the sub tank 16 is connected to a position below a predetermined height X where the upper end portion of the overflow pipe 18 is disposed, and is installed so as to supply the chemical liquid LM to the pipe 44. On the other hand, a pipe 46 for supplying the chemical liquid LM to the outside is connected to the discharge side of the supply pump 22. This pipe 46 is laid to a pipe between the raw water pump 80 and the sand filtration tower 82 as shown in FIG. 1 through a semicircular notch provided in the cover 34 described later. ing. In the example of FIG. 3, flexible piping tubes are used for the above-described pipings 40, 42, 44 and 46.

  Also, as shown in FIG. 3, the top plate 24 has a cover 34 so as to cover the sub-tank 16, the circulation pump 20, the supply pump 22, and the common base 26 on which these are installed. is set up. As a result, the short pipe 30 into which the overflow pipe 18 is inserted, the short pipe 32 into which the pipe 40 is inserted, the pipe 42, the pipe 44, a part of the pipe 46 and the like are also covered with the cover 34. The cover 34 is formed by combining, for example, vinyl chloride plates having a thickness of about 3 mm.

  Next, with reference to FIG. 1 and FIG. 3, the flow of the chemical liquid LM storage and supply method by the chemical liquid storage and supply apparatus 10 according to the embodiment of the present invention having the above-described configuration and arrangement will be described. . The chemical liquid LM stored in the storage tank 14 is sucked through the pipe 40 by the circulation pump 20 and supplied to the sub tank 16 through the pipe 42. The supply of the chemical LM to the sub tank 16 by the circulation pump 20 is always performed. The chemical LM supplied to the sub tank 16 is stored in the sub tank 16 up to an amount not exceeding the predetermined height X where the upper end portion of the overflow pipe 18 is located, and the amount exceeding the predetermined height X is overflowed. It is returned to the storage tank 14 via the pipe 18. Further, the chemical solution LM stored in the sub tank 16 is sucked by the supply pump 22 through the supply unit 16a and the pipe 44, and is treated water before being supplied to the sand filtration tower 82 through the pipe 46. Supplied against.

  Next, referring to FIG. 1 and FIG. 4, a countermeasure against temperature of the chemical liquid LM in the chemical liquid storage and supply apparatus 10 according to the embodiment of the present invention will be described. FIG. 4 schematically shows a storage tank 14 to which temperature countermeasures are taken, and the storage tank 14 is the same as the storage tank 14 shown in FIG. In FIG. 4, a copper pipe 60 is wound around the outer periphery of the storage tank 14. As an example, the copper pipe 60 has an outer diameter of 8 mm and a thickness of about 1 mm, and is wound around the storage tank 14 at a pitch of 70 to 80 mm with an inclination of about 10 degrees from the horizontal. As shown in FIG. 1, the raw water RW stored in the raw water tank 74 is supplied to the copper pipe 60 from one end of the copper pipe 60 by the cooling pump 76. And the raw | natural water RW supplied from the end of the copper pipe 60 passes through the inside of the copper pipe 60 wound around the storage tank 14, and then passes through the pipe 78 connected to the other end of the copper pipe 60. It is returned to the raw water tank 74.

  Further, as shown in FIG. 4, a heat insulating material 62 and a heat insulating material cover 64 are installed on the outer periphery of the storage tank 14 so as to cover the copper pipe 60. For example, a 20 mm thick polyester nonwoven fabric that can be recycled can be used for the heat insulating material 62, and a 1 mm thick aluminum glass-based material can be used for the heat insulating material cover 64. Other materials may be used as appropriate. For convenience of explanation, in FIG. 1, illustration of the heat insulating material 62 and the heat insulating material cover 64 is omitted, and in FIG. 4, only a cross section of the heat insulating material 62 and the heat insulating material cover 64 is shown.

  Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained. That is, as shown in FIG. 1, the chemical liquid storage and supply device 10 according to the embodiment of the present invention includes a storage tank 14 for storing the chemical liquid LM and a sub tank 16 having an overflow pipe 18 therein. Yes. The storage tank 14 includes a top plate 24 that covers the entire upper surface as shown in FIG. 2, and the sub tank 16 is disposed on the top plate 24 as shown in FIG. 3. For the top plate 24, for example, a resin plate is used. The chemical liquid storage and supply device 10 also supplies the chemical liquid LM stored in the storage tank 14 to the sub-tank 16 at all times, and the chemical liquid LM in the sub tank 16 to the outside of the chemical liquid storage and supply device 10. The two supply pumps 22 are arranged on the top plate 24 as well as the sub tank 16. As will be described later, these elements are arranged so as to be integrated on the top plate 24, so that the storage tank 14 is located immediately below the sub tank 16 and the circulation pump 20. Further, the sub tank 16, the circulation pump 20, and the supply pump 22 are arranged as close as possible on the top plate 24.

  The sub tank 16, the circulation pump 20, and the supply pump 22 are collectively arranged at appropriate positions on the top plate 24 in consideration of the length of pipes that communicate each element, the handling, and the like. In the example of FIG. 3, a common base 26 is installed on a part of the top plate 24, and these elements are arranged on the common base 26. The circulation pump 20 sucks the chemical liquid LM from the storage tank 14 disposed immediately below through the piping 40 installed through the top plate 24, and the sucked chemical liquid LM is disposed in the vicinity. The sub-tank 16 is supplied via a pipe 42. Further, the supply pump 22 sucks the chemical liquid LM from the sub-tank 16 disposed in the vicinity through the supply section 16 a and the pipe 44 and supplies the sucked chemical liquid LM to the outside through the pipe 46.

  The overflow pipe 18 provided in the sub tank 16 has an upper end disposed at a predetermined height X inside the sub tank 16 and an lower end disposed at the lower end inside the storage tank 14 immediately below the sub tank 16. ing. That is, the overflow pipe 18 is installed through the bottom of the sub tank 16 and the top plate 24, and the inside of the sub tank 16 and the inside of the storage tank 14 are in communication with each other through the overflow pipe 18. . As the height X inside the sub tank at the upper end of the overflow pipe 18, the pipe 42 for supplying the chemical liquid LM by the circulation pump 20 is lower than the height connected to the sub tank 16 and is connected to the supply pump 22. The supply unit 16 a that supplies the chemical liquid LM to the pipe 44 is set to be higher than the height connected to the sub tank 16. Therefore, in the sub tank 16, the chemical liquid LM constantly supplied by the supply pump 22 flows into the overflow pipe 18 from the upper end of the overflow pipe 18 in an amount exceeding the predetermined height X where the upper end of the overflow pipe 18 is located. The water is returned from the lower end of the overflow pipe 18 into the storage tank 14. Thereby, even when the chemical liquid LM is supplied to the outside and the storage amount of the chemical liquid LM decreases, or when the chemical liquid LM is replenished and the storage amount of the chemical liquid LM increases, the influence of the chemical liquid LM in the storage tank 14 is increased. The height of the liquid level of the chemical liquid LM in the sub tank 16 can always be maintained at the same height as the predetermined height X at which the upper end of the overflow pipe 18 is located. And the chemical | medical solution LM can be supplied to the exterior by the supply pump 22 from the sub tank 16 with which the storage amount of the chemical | medical solution LM is always constant.

  With the configuration as described above, the chemical liquid storage and supply device 10 according to the embodiment of the present invention has a storage tank 14 provided with a top plate 24 covering the entire upper surface as shown in FIG. Intrusion of rainwater or the like into the tank 24 can be prevented. Further, as shown in FIG. 3, the sub tank 16, the circulation pump 20, and the supply pump 22 are arranged on the top plate 24, so that the storage tank 14 is located directly under the circulation pump 20, The sub tank 16 and the supply pump 22 are disposed close to each other. Accordingly, each of the pipe 40 for sucking the chemical liquid LM from the storage tank 14 by the circulation pump 20 and the pipe 44 for sucking the chemical liquid LM from the sub tank 16 by the supply pump 22 has a short length, and Can be laid with simple routing. For this reason, it is difficult for gas generated from the chemical liquid LM to accumulate in each pipe, and it is possible to prevent the occurrence of gas lock, which is a problem particularly on the suction side of the pump. Further, since the liquid level of the chemical liquid LM in the sub tank 16 is always maintained at the same height X as the position of the upper end of the overflow pipe 18, the lift of the supply pump 22 that sucks the chemical liquid LM from the sub tank 16 is constant. Therefore, the supply amount of the chemical liquid LM can be stabilized. Accordingly, the chemical liquid LM can be stably supplied while suppressing the influence of the temperature, the weather, and the like, and safe processing water can be stably supplied by using the storage and supply device 10 of this chemical liquid for water treatment. It becomes possible to do.

  In addition, the chemical liquid storage and supply device 10 according to the embodiment of the present invention is such that two short tubes 30 and 32 are provided upright through a top plate 24 that covers the entire upper surface of the storage tank 14. is there. Each of these two short pipes 30 and 32 has flange portions 30 a and 32 a at one end, and the length excluding the flange portions 30 a and 32 a is longer than the thickness of the top plate 24. The short pipe 30 has an inner diameter equal to the outer diameter on the lower end side of the overflow pipe 18, and the short pipe 32 has an outer diameter of the pipe 40 for sucking the chemical liquid LM from the storage tank 14 by the circulation pump 20. Has an inner diameter equal to For these short pipes 30 and 32, for example, a valve socket made of vinyl chloride or the like is used. Each of the two short tubes 30 and 32 is inserted into a through-hole having an inner diameter equal to the outer diameter of each short tube provided in the top plate 24, inside the storage tank of the top plate 24 (lower side in the figure). Therefore, the upper end portions 30b and 32b opposite to the flange portions 30a and 32a are screwed in first. For this reason, the flange portions 30a and 32a are in close contact with the storage tank inner side surface (lower side surface in the drawing) of the top plate 24, and the upper end portions 30b and 32b are from the storage tank outer side surface (upper side surface in the drawing) of the top plate 24. It becomes the aspect which protruded predetermined length. And between the outer periphery of the short tubes 30 and 32 and the inner periphery of the through-hole provided in the top plate 24, and the storage tank inner surface of the flanges 30a and 32a of the short tubes 30 and 32 and the top plate 24 For example, it is fixed with an adhesive for vinyl chloride. Of the two short tubes 30 and 32 erected on the top plate 24 as described above, the short tube 30 has the lower end side of the overflow pipe 18 protruding from the bottom of the sub tank 16 inserted from the upper end portion 30b. A pipe 40 for sucking the chemical liquid LM from the storage tank 14 by the circulation pump 20 is inserted into the short pipe 32 from the upper end 32b.

  With the above-described configuration, the chemical liquid storage and supply device 10 according to the embodiment of the present invention has the upper end portions 30b and 32b of the short tubes 30 and 32 even when rainwater or the like accumulates on the top plate 24. Since it is at a position higher by the length protruding from the top plate 24, the gap between the short pipe 30 and the overflow pipe 18 inserted into the short pipe 30, and the pipe 40 inserted into the short pipe 32 and the short pipe 32. It is possible to prevent rainwater and the like from entering through the gap. Furthermore, between the outer periphery of the short tubes 30 and 32 and the inner periphery of the through hole provided in the top plate 24, the flange portions 30 a and 32 a of the short tubes 30 and 32, and the storage tank inner surface of the top plate 24 Since it is fixed with an adhesive or the like, rainwater or the like can be prevented from entering through these gaps. Moreover, since the overflow pipe 18 and the pipe 40 for sucking the chemical LM from the storage tank 14 by the circulation pump 20 are inserted without being fixed to the short pipes 30 and 32, they are short as necessary. If it pulls out from the pipe | tubes 30 and 32, a maintenance etc. can be performed easily.

  Furthermore, in the chemical liquid storage and supply device 10 according to the embodiment of the present invention, a cover 34 is installed on the top plate 24 so as to cover the sub tank 16, the supply pump 20 and the circulation pump 22. It is. For the cover 34, for example, a combination of vinyl chloride plates in a bottomless box shape having a size sufficient to sufficiently cover the entire sub-tank 16, supply pump 20, and circulation pump 22 is used. . Thereby, not only the sub tank 16, the supply pump 20 and the circulation pump 22, but also the piping 40 for sucking the chemical liquid LM from the storage tank 14 by the circulation pump 20 and the piping for supplying the chemical liquid LM to the sub tank 16 by the circulation pump 20. 42, the pipe 44 for sucking the chemical LM from the sub tank 16 by the supply pump 22, the lower end side of the overflow pipe 18 protruding from the bottom of the sub tank 16, etc. can be covered with the cover 34. It can be prevented from being exposed. Furthermore, since the short pipe 30 into which the pipe 40 is inserted and the short pipe 32 into which the overflow pipe 18 is inserted are also covered with a cover, the gap between the pipe 40 or the overflow pipe 18 and the short pipes 30 and 32, It is also possible to prevent rainwater and the like from entering the storage tank 14 from the gap between the short tubes 30 and 32 and the top plate 24.

Moreover, the chemical | medical solution storage and supply apparatus 10 which concerns on embodiment of this invention is wound around the outer periphery of the storage tank 14, and the copper pipe 60 into which a refrigerant | coolant flows is wound around as shown in FIG. The chemical liquid LM stored in the storage tank 14 may have undesirable effects such as an increase in the reaction rate of oxidation or the like and an increase in the concentration of the reaction product when the temperature rises. For this reason, as described above, the copper pipe 60 through which the refrigerant flows is wound around the outer periphery of the storage tank 14, thereby cooling the chemical liquid LM stored in the storage tank 14, so It becomes possible to prevent the temperature rise of the chemical liquid LM due to the influence.
Furthermore, a heat insulating material 62 may be installed on the outer periphery of the storage tank 14. In the example of FIG. 4, a heat insulating material 62 is installed so as to cover the copper pipe 60 wound around the outer periphery of the storage tank 14, and a heat insulating material cover 64 is further installed around the heat insulating material 62. Thereby, since the transmission of the atmospheric temperature to the storage tank 14 cooled by the copper pipe 60 is suppressed, the chemical liquid LM can be efficiently cooled, and the temperature rise of the chemical liquid LM can be prevented. .

  On the other hand, as shown in FIG. 1, the groundwater purification treatment apparatus 12 according to the embodiment of the present invention includes the chemical liquid storage and supply apparatus 10 according to the embodiment of the present invention as described above. The storage and supply device 10 stores and supplies sodium hypochlorite. Therefore, since sodium hypochlorite is stably supplied to the groundwater to be treated, it is possible to provide safe quality groundwater.

  And the groundwater purification processing apparatus 12 which concerns on embodiment of this invention is equipped with the raw | natural water tank 74 which stores the groundwater pumped up from the well 70 as raw | natural water RW, and is attached to the copper pipe 60 currently wound around the storage tank 14 The raw water RW stored in the raw water tank 74 is circulated to flow. When circulating the raw water RW through the copper pipe 60, the raw water RW is pumped from the raw water tank 74 by the cooling pump 76, supplied to one end of the copper pipe 60 through the pipe, and connected to the other end of the copper pipe 60. The raw water RW is returned to the raw water tank 74 through the pipe 78. Generally, since the water temperature of groundwater is about 12 to 18 ° C. throughout the year, the raw water RW exhibits a sufficient effect as a refrigerant for cooling the sodium hypochlorite in the storage tank 14. This eliminates the need for a dedicated facility for supplying the refrigerant flowing through the copper pipe 60, and makes it possible to prevent an increase in the temperature of sodium hypochlorite inexpensively and efficiently using existing facilities, particularly in the summer season. An increase in the chloric acid concentration of sodium hypochlorite, which is a concern, can be prevented.

Further, since the storage tank 14 and the raw water tank 74 are arranged close to each other, the length of the pipe for supplying the raw water RW from the raw water tank 74 to the copper pipe 60 is shortened. For this reason, the temperature rise of the raw | natural water RW by the influence of temperature etc. during passing this piping is reduced, and sodium hypochlorite can be cooled more effectively.
In addition, since the copper pipe 60 wound around the storage tank 14 is easily corroded by sodium hypochlorite, the groundwater purification treatment apparatus 12 shown in FIG. 4 uses sodium hypochlorite as raw water RW in the raw water tank 74. The sodium hypochlorite is added to the water to be treated just before being pumped from the raw water tank 74 by the raw water pump 80 and filtered by the sand filtration tower 82, so that sodium hypochlorite is added. Corrosion of the copper tube 60 due to is prevented.

  10: Chemical solution storage and supply device, 12: Groundwater purification treatment device, 14: Storage tank, 16: Sub tank, 18: Overflow pipe, 20: Circulation pump, 22: Supply pump, 24: Top plate, 30, 32: Short Pipe, 30a, 32a: flange part, 34: cover, 40: piping, 60: copper pipe, 62: heat insulating material, 70: well, 74: raw water tank, LM: chemical solution, RW: raw water, X: height of overflow pipe The

Claims (16)

A chemical storage and supply device,
A storage tank for storing the chemical liquid, a sub tank having an overflow pipe therein, a circulation pump for constantly supplying the chemical liquid in the storage tank to the sub tank, and a supply pump for supplying the chemical liquid in the sub tank to the outside,
The storage tank includes a top plate that covers the entire upper surface, and the sub-tank, the supply pump, and the circulation pump are disposed on the top plate,
The overflow pipe is disposed through the top plate so that the upper end is disposed at a predetermined height inside the sub-tank and the lower end is disposed inside the storage tank. Storage and supply device. The top plate is erected with two short pipes having a flange portion at one end, and each of the two short tubes has the flange portion in close contact with the inner surface of the storage tank of the top plate. And the other end side protrudes a predetermined length from the outer surface of the storage tank of the top plate,
2. The chemical solution according to claim 1, wherein a lower end side of the overflow pipe and a pipe for sucking the chemical liquid from the storage tank by the circulation pump are inserted into each of the two short pipes. Storage and supply device.   The chemical liquid storage and supply device according to claim 1, wherein a cover that covers all of the sub-tank, the supply pump, and the circulation pump is installed on the top plate.   The chemical | medical solution storage and supply apparatus of any one of Claim 1 to 3 by which the copper pipe | tube with which a refrigerant | coolant flows inside is wound around the outer periphery of the said storage tank.   The chemical | medical solution storage and supply apparatus of any one of Claim 1 to 4 with which the heat insulating material is installed in the outer periphery of the said storage tank. A chemical solution storage and supply device according to any one of claims 1 to 5,
A groundwater purification treatment apparatus characterized in that sodium hypochlorite is stored and supplied by the chemical liquid storage and supply apparatus. It has a raw water tank to store groundwater pumped from a well,
The groundwater purification treatment apparatus according to claim 6, wherein groundwater in the raw water tank is circulated through the copper pipe.   The groundwater purification treatment apparatus according to claim 7, wherein the storage tank and the raw water tank are arranged close to each other. A method for storing and supplying chemicals,
A storage tank having a top plate that covers the entire upper surface, a storage tank for storing a chemical solution, a sub tank having an overflow pipe therein, a circulation pump for supplying the chemical solution in the storage tank to the sub tank, and a chemical solution in the sub tank Using a chemical storage and supply device including a supply pump for supplying to the outside,
The sub tank, the supply pump, and the circulation pump are disposed on the top plate,
The chemical liquid is constantly supplied from the storage tank to the sub tank by the circulation pump, and a part of the chemical liquid in the sub tank is returned to the storage tank by the overflow pipe, whereby the liquid level of the chemical liquid in the sub tank is increased. A method for storing and supplying a chemical solution, characterized by maintaining the height at a predetermined height. Two short pipes having a flange portion at one end are pierced through the top plate, and the flange portions of each of the two short tubes are brought into close contact with the inner surface of the storage tank of the top plate. And projecting the other end side a predetermined length from the storage tank outer surface of the top plate,
The supply and supply of the chemical liquid according to claim 9, wherein a lower end side of the overflow pipe and a pipe for sucking the chemical liquid from the storage tank by the circulation pump are inserted into each of the two short pipes. Method.   The chemical | medical solution storage and supply apparatus of Claim 9 or 10 which installs the cover which covers the said sub tank, the said supply pump, and the said circulation pump on the said top plate.   The method for storing and supplying a chemical solution according to any one of claims 9 to 11, wherein a copper pipe having a coolant flowing therein is wound around an outer periphery of the storage tank.   The method for storing and supplying a chemical solution according to any one of claims 9 to 12, wherein a heat insulating material is installed on an outer periphery of the storage tank.   A method for storing and supplying sodium hypochlorite for addition to groundwater to be purified by the method for storing and supplying chemical liquid according to any one of claims 9 to 13. Using groundwater purification treatment equipment including a raw water tank that stores groundwater pumped from a well,
The groundwater purification treatment method according to claim 14, wherein groundwater in the raw water tank is circulated through the copper pipe.   The groundwater purification treatment method according to claim 15, wherein the storage tank and the raw water tank are arranged close to each other.

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