JP6477218B2 - Chemical injection device - Google Patents

Description

  The present invention relates to a chemical injection device that performs chemical injection to circulating water that is cooled by a cooling tower and supplied to an apparatus to be cooled.

  In commercial buildings, industrial plants, etc., cooling water is used to cool a device to be cooled (cooling load device) such as a heat exchanger incorporated in an air conditioner or a refrigerator. From the viewpoint of saving the cooling water, the cooling water is circulated between the cooling tower for cooling the cooling water and the apparatus to be cooled (hereinafter, the circulating cooling water is appropriately referred to as “circulated water”).

  When circulating water is continuously circulated, the quality of the circulating water gradually deteriorates, and slime damage is likely to occur with the growth of microorganisms. Therefore, chemicals such as bactericides are supplied to the circulating water. Yes. As a drug supply system, a method using a dissolution container that contains a solid drug is known. For example, Patent Literatures 1 to 3 disclose such a chemical injection device. Patent Document 1 has a configuration in which a dissolution container for containing a solid drug is arranged outside the cooling tower, and a drug solution generated by bringing water collected in the cooling tower into contact with the solid drug is supplied to the cooling tower. It is disclosed. Patent Document 2 discloses a configuration in which the drug concentration of circulating water is monitored and the supply state of a solution for dissolving the solid drug is controlled according to the drug concentration. Patent Document 3 discloses a configuration that adjusts dissolution of a solid drug by setting a space velocity range.

JP2013-210134A JP 2003-154241 A JP 2005-270798 A

  By the way, when the cooling tower is in operation, the level of contamination by microorganisms and the like becomes high, so that it is necessary to increase the amount of chemical injection compared to when the cooling tower is stopped. However, when the dissolution container containing the solid drug is immersed in the place where the circulating water inside the cooling tower is stored, the solid drug dissolves in the circulating water regardless of whether the cooling tower is operating or not. It will be. When the immersion amount of the solid medicine is set on the basis of the amount of chemical injection required when the cooling tower is in operation, an excessive amount of medicine is injected when the cooling tower is stopped. In this regard, according to the configuration of Patent Document 1, the solid drug can be dissolved and poured only when the cooling tower is operating. However, when the cooling tower is not in operation, chemical injection is not performed, and the effect of the medicine is lost while the cooling tower is stopped, and the circulating water may be contaminated with microorganisms. In the configuration of Patent Document 2, a device for monitoring the drug concentration is required, and the device must be operated even when the cooling tower is stopped. Even in the configuration of Patent Document 3, a quantitative solution can be provided, but when the amount of chemical injection is changed between when the cooling tower is in operation and when it is stopped, control for that is performed when the cooling tower is in operation and when it is stopped. There is a need.

  INDUSTRIAL APPLICABILITY According to the present invention, an appropriate amount of a drug solution can be supplied to circulating water when the cooling tower is in operation and when the cooling tower is in operation without requiring complicated control and structure in a drug injection device using a solid drug. It aims at providing a chemical injection device.

  The present invention is a chemical injection device that performs chemical injection to circulating water that is cooled by a cooling tower and supplied to a cooled device, and immerses the first solid medicine in the circulating water stored in the cooling tower. The present invention relates to a drug injection device comprising: a first dissolution container; and a second dissolution container that dissolves the second solid medicine by using movement of water during operation of the cooling tower.

  It is preferable that the second dissolution container is disposed in a watering tank included in the cooling tower.

  It is preferable that the second dissolution vessel is arranged on a branch line that branches from a circulation line through which circulating water circulates and is connected to the inside of the cooling tower.

  It is preferable that the second dissolution container is disposed in a flow path of makeup water that is replenished during operation of the cooling tower.

  According to the present invention, in a chemical injection device using a solid drug, an appropriate amount of drug solution is added to circulating water each time the cooling tower is operated and stopped without requiring complicated control and structure. A chemical injection device that can be supplied can be provided.

It is the figure which showed typically the cooling system to which the chemical injection apparatus of 1st Embodiment is applied. It is the figure which showed typically the cooling system with which the chemical injection apparatus of 2nd Embodiment is applied. It is the figure which showed typically the cooling system with which the chemical injection apparatus of 3rd Embodiment is applied. It is the figure which showed typically the cooling system with which the chemical injection apparatus of 4th Embodiment is applied.

  Hereinafter, each preferred embodiment of the chemical injection device of the present invention will be described with reference to the drawings. The “line” in the present specification is a general term for lines capable of flowing a fluid such as a flow path, a path, and a pipeline.

<First Embodiment>
FIG. 1 is a diagram schematically showing a cooling system 1 to which the drug injection device 150 of the first embodiment is applied. The cooling system 1 is a water treatment system that circulates circulating water W2 (cooling water) that cools a cooled device 131 such as a heat exchanger incorporated in an air conditioner or a refrigerator in the system.

  As shown in FIG. 1, the cooling system 1 of 1st Embodiment is provided with the cooling tower 120, the to-be-cooled apparatus 131, the circulating water pump 132, and the chemical injection apparatus 150 as main structures. The cooling system 1 includes a circulation line L110 including a circulating water supply line L111 and a circulating water recovery line L112, and a makeup water line L120 as main lines. Hereinafter, each component of the cooling system 1 will be described.

  First, the cooling tower 120 will be described. The cooling tower 120 includes a tower main body 121, a watering tank 145, a watering part 146, a filler 147, a louver 148, a fan 149, a storage part 116, and a water supply part 137.

  The tower main body 121 is a casing that forms an outer shell of the cooling tower 120. Each component of the cooling tower 120 is provided in the tower main body 121.

  The watering tank 145 is provided in the upper part of the tower main body 121. The watering tank 145 is connected to the cooled apparatus 131 by a circulating water recovery line L112 of the circulating line L110. When the cooling tower 120 is in operation, the circulating water W2 used in the apparatus to be cooled 131 is sent to the watering tank 145 through the circulating water recovery line L112.

  The watering part 146 is provided below the watering tank 145. The water sprinkling unit 146 is composed of a plurality of nozzles, and sprays circulating water W2 stored in the water sprinkling tank 145 into the tower main body 121 when the cooling tower 120 is in operation. In addition, since the circulating water W2 stored in the watering tank 145 is sprinkled by the watering part 146, it is stored in the watering tank 145 only when the cooling tower 120 is operated (that is, when the circulating water pump 132 is driven). Become.

  The filler 147 is provided below the sprinkler 146 inside the tower body 121 and above the reservoir 116. The filler 147 makes the circulating water W2 sprayed from the water sprinkling unit 146 into a drop shape (or a liquid film shape) to increase the contact area and the contact time between the circulating water W2 and the outside air. Thereby, cooling of circulating water W2 is performed efficiently.

  The louver 148 is a ventilation hole for introducing outside air into the tower body 121. Air outside the tower body 121 can flow into the tower body 121 through the louver 148.

  The fan 149 is provided in an opening 141 formed at the upper center of the tower main body 121. When the fan 149 is driven to rotate, outside air flows from the louver 148 into the tower body 121, and an airflow is generated in which the air inside the tower body 121 flows out through the opening 141.

  The storage unit 116 is a lower water tank provided at the lower part of the tower main body 121. The circulating water W2 sprayed from the sprinkler 146 is cooled and stored in the reservoir 116 in the process of falling inside the tower body 121. The storage unit 116 is connected to the cooled apparatus 131 by a circulating water supply line L111 of the circulation line L110. When the cooling tower 120 is in operation, the circulating water W2 in the storage unit 116 is supplied to the cooled device 131 through the circulating water supply line L111.

  The water supply unit 137 manages the water level (that is, the amount of water) of the circulating water W2 in the storage unit 116. The water supply unit 137 is connected to a makeup water line L120 for replenishing the makeup water W1, and when the water level of the storage unit 116 falls below a predetermined water level due to evaporation and scattering of the circulating water W2, the supply water W1 is supplied to the storage unit 116. Supply.

  The water supply unit 137 of the present embodiment is a ball tap type water supply device including a floating ball 138 and a water supply valve 139. When the water level of the storage unit 116 falls below the predetermined water level, the floating ball 138 of the water supply unit 137 moves downward, the water supply valve 139 opens, and the makeup water W1 flows from the water supply valve 139 to the storage unit 116.

  As described above, the cooling tower 120 of the first embodiment is a so-called open type cooling tower. The circulating water W2 cooled by the cooling tower 120 is supplied to the cooled device 131.

  The to-be-cooled device 131 is various devices such as a heat exchanger that needs to be cooled by the circulating water W2. The apparatus to be cooled 131 is, for example, a turbo chiller or an absorption chiller for various chemical plants, an air conditioner chiller for buildings, a cold water production machine or a vacuum chiller for food factories, and the like.

  The circulating water pump 132 is provided in the circulating water supply line L111. The circulating water pump 132 is a circulating drive source that sends the circulating water W2 from the upstream side to the downstream side of the circulating line L110 (the circulating water supply line L111, the circulating water recovery line L112). The circulating water W2 flows through the circulation line L110 by driving the circulating water pump 132.

  The chemical injection device 150 will be described. The chemical injection device 150 of the first embodiment includes a first dissolution container 151 disposed inside the tower main body 121 and a second dissolution container 152 disposed in the sprinkling tank 145.

  First, the first dissolution container 151 will be described. The first dissolution container 151 includes a container main body 160 formed in a vertically long cylindrical shape, and an opening 161 provided at the bottom of the container main body 160 so that the opening degree can be adjusted. By adjusting the opening degree of the opening 161, the outflow amount of the drug solution W10 can be adjusted.

  In the container body 160, a plurality of disinfectants (halogen-based disinfectant or organic disinfectant) stacked in the vertical direction is accommodated as the first solid drug 165a. In addition, it can replace with a disinfectant as a chemical | medical agent which comprises the 1st solid chemical | medical agent 165a, and can also use a scale inhibitor and anticorrosive. The various compounds that can be used as the first solid drug 165a are listed below. The various compounds listed may be molded into a tablet alone, or may be molded into a tablet in a state where a plurality of compounds are blended in a required ratio.

<Halogen-based disinfectant>
◎ Isocyanuric acid compounds: trichloroisocyanuric acid, dichloroisocyanuric acid, etc. ◎ Hypochlorous acid compounds: calcium hypochlorite (bleaching powder), etc. ◎ Halogenated hydantoin derivatives: 1-bromo-3-chloro-5,5-dimethyl Hydantoin etc. <Organic fungicides>
◎ isothiazoline compounds: 5-chloro-2-methyl-4-isothiazolin-3-one, 2-methyl-4-isothiazolin-3-one, etc. ◎ triazine compounds: 2- (t-butylamino) -4-chloro -6-Ethylamino-1,3,5-triazine, etc. A quaternary ammonium salt compound: alkyldimethylbenzylammonium chloride [other name: benzalkonium chloride], etc. <Scale inhibitor>
◎ Carboxylic acid polymer: Polyacrylic acid, polyacrylate, polymaleic acid, polymaleate, etc.
◎ Heavy metal compounds: zinc salts, molybdenum salts, etc. ◎ Inorganic compounds: nitrites, etc. ◎ Organic compounds: 1,2,3-benzotriazole, etc.

  The first dissolution container 151 is fixed to the tower main body 121 by a fixture 169. The fixed position of the 1st dissolution container 151 is a position where the opening part 161 is lower than the predetermined water level of the circulating water W2 stored by the storage part 116. FIG. The predetermined water level of the circulating water W2 is a water level maintained by the water supply unit 137 described above. Moreover, the 1st dissolution container 151 is being fixed so that at least one part of the 1st solid chemical | medical agent 165a accommodated in the inside may become a position higher than a predetermined water level. Since the opening 161 is at a position lower than the predetermined water level, the lower part of the first solid medicine 165a is dissolved by the circulating water W2, and the medicine solution W10 flows out to the storage part 116 through the opening 161. When the portion (tablet) in contact with the circulating water W2 of the first solid drug 165a is melted, the upper tablet falls due to its own weight, and the dropped tablet becomes a position lower than the predetermined water level of the circulating water W2, and the first solid drug Dissolution of 165a continues.

  In this way, the first solid drug 165a accommodated in the first dissolution container 151 is always in contact with the circulating water W2 and dissolved regardless of whether the cooling tower 120 is operating or not. Is in a state of being. That is, the first dissolution container 151 is always injecting the drug solution W10 into the circulating water W2.

  Next, the second dissolution container 152 will be described. The second dissolution container 152 is a vertically long cylindrical container configured to be able to accommodate the second solid drug 165b, and has the same configuration as the first dissolution container 151. The same thing as the 1st solid medicine 165a is used also about the 2nd solid medicine 165b.

  The second dissolution container 152 is fixed to the watering tank 145 by a fixture 179. As described above, when the cooling tower 120 is operated, the circulating water W2 is stored in the sprinkling tank 145, and the second solid medicine 165b accommodated in the second dissolution container 152 is dissolved by the stored circulating water W2. To do. The drug solution W10 in which the second solid drug 165b is dissolved is mixed in the circulating water W2, and the circulating water W2 is sprayed through the sprinkler 146. On the other hand, when the cooling tower 120 is stopped, the supply of the circulating water W2 to the watering tank 145 is stopped, and the circulating water W2 remaining in the watering tank 145 also flows out from the watering part 146. Therefore, when the cooling tower 120 is stopped, the circulating water W2 is not supplied to the second solid medicine 165b, and the medicine is not poured by the second dissolution container 152. That is, the second dissolution container 152 pours the chemical solution W10 into the circulating water W2 only when the cooling tower 120 is in operation by the water that has moved to the watering tank 145 due to the operation of the cooling tower 120.

  The main structure of the chemical injection device 150 is as described above. When the cooling tower 120 is stopped, the water quality of the circulating water W2 is maintained at an appropriate level by the chemical solution W10 flowing out from the first dissolution vessel 151. When the cooling tower 120 is in operation, in addition to the drug solution W10 that continues to flow out of the first dissolution container 151, the circulating water W2 is supplied to the sprinkling tank 145 so that the drug solution W10 also flows out of the second dissolution container 152. As a result, the amount of chemical injection in the entire cooling tower 120 increases, so that the quality of the circulating water W2 that is easily contaminated with microorganisms or the like during operation can be maintained at an appropriate level.

  The medicine injection device 150 according to the first embodiment described above has the following effects. The chemical injection device 150 includes a first dissolution container 151 that immerses the first solid medicine 165a in the circulating water W2 stored inside the cooling tower 120, and a movement of water when the second solid medicine 165b operates the cooling tower 120. And a second dissolution container 152 that is dissolved using the above. Thereby, the chemical injection device 150 that can appropriately change the chemical injection amount when the cooling tower 120 is operating and when the cooling tower 120 is stopped can be realized without adding complicated control and configuration. That is, when the cooling tower 120 is stopped, only the first solid drug 165a is dissolved in the circulating water W2, and thus excessive drug injection is prevented. When the cooling tower 120 is in operation, the second solid medicine 165b is dissolved in addition to the first solid medicine 165a by the movement of the circulating water W2, so that the circulating water W2 during operation that is likely to be contaminated with microorganisms or the like. A sufficient amount of drug is injected to maintain adequate water quality.

  The 2nd dissolution container 152 of 1st Embodiment is arrange | positioned at the watering tank 145 which the cooling tower 120 has. By using the sprinkler tank 145 to which the circulating water W2 is supplied only during operation, the chemical injection device 150 that changes the chemical injection amount when the cooling tower 120 is operating and when it is stopped can be realized with a simple configuration.

Second Embodiment
Next, the chemical injection apparatus 250 of 2nd Embodiment is demonstrated. Drawing 2 is a figure showing typically cooling system 201 to which medicine injection device 250 of a 2nd embodiment is applied. In addition, about the structure similar to 1st Embodiment, the same code | symbol may be attached | subjected to drawing and the description may be abbreviate | omitted.

  The chemical injection device 250 of the second embodiment includes a first dissolution container 151 disposed in the storage unit 116 of the tower main body 121 and a second dissolution container 252 disposed in the branch line L200 branched from the circulation line L110. Prepare. Each of the first dissolution container 151 and the second dissolution container 252 has the same configuration as the first dissolution container 151 and the second dissolution container 152 of the first embodiment. The second dissolution container 252 is different from the second dissolution container 152 of the first embodiment in the arrangement location.

  The branch line L200 in which the chemical injection device 250 of 2nd Embodiment is arrange | positioned is demonstrated. The branch line L200 includes a first branch line L210 and a second branch line L211. The first branch line L210 branches from the circulating water supply line L111 of the circulation line L110 and is connected to the second dissolution vessel 252. The second branch line L211 connects the second dissolution vessel 252 and the storage unit 116 provided in the tower main body 121. In addition, in order to adjust the supply flow rate of the circulating water W2 to the second dissolution vessel 252, the first branch line L210 can be provided with an appropriate flow rate adjusting means (for example, an orifice or a valve mechanism).

  As described above, when the cooling tower 120 is in operation, the circulating water pump 132 is driven and the circulating water W2 flows through the circulation line L110. During the operation of the cooling tower 120, a part of the circulating water W2 is supplied from the circulating water supply line L111 of the circulation line L110 to the second dissolution vessel 252 through the first branch line L210. The second solid drug 165b is dissolved by the circulating water W2 supplied to the second dissolution container 252 and the drug solution W10 is poured into the circulating water W2 stored in the storage unit 116 through the second branch line L211.

  When the cooling tower 120 is stopped, the circulating water W2 does not flow through the circulation line L110. Therefore, the circulating water W2 is not supplied to the second dissolution container 252 through the first branch line L210, and the second solid drug 165b is not dissolved. That is, the chemical injection of the chemical solution W10 by the second dissolution container 252 is performed when the cooling tower 120 is operated, and is not performed when the cooling tower 120 is stopped.

  The medicine injection device 250 according to the second embodiment described above has the following effects. The chemical injection device 250 branches from the first dissolution container 151 that immerses the first solid medicine 165a in the circulating water W2 stored in the cooling tower 120 and the circulation line L110 through which the circulating water W2 circulates. 2nd dissolution container 252 arrange | positioned at the branch line L200 connected to the inside. Thereby, during operation of the cooling tower 120, the circulating water W2 can be stably supplied to the second dissolution vessel 252 through the branch line L200, and the chemical solution W10 of the second solid drug 165b can be quantitatively discharged. it can.

<Third Embodiment>
Next, the chemical injection apparatus 350 of 3rd Embodiment is demonstrated. FIG. 3 is a diagram schematically showing a cooling system 301 to which the drug injection device 350 of the third embodiment is applied. In addition, about the structure similar to 1st Embodiment, the same code | symbol may be attached | subjected to drawing and the description may be abbreviate | omitted.

  The chemical injection device 350 of the third embodiment includes a first dissolution container 151 disposed in the storage part 116 of the tower main body 121 and a second dissolution container 352 disposed in the flow path of the makeup water W1. Each of the first dissolution container 151 and the second dissolution container 352 has substantially the same configuration as the first dissolution container 151 and the second dissolution container 152 of the first embodiment.

  The location of the second dissolution container 352 will be described. The second dissolution container 352 of the third embodiment is fixed by a fixture 169 below the water supply valve 139. In the third embodiment, the opening 161 of the second dissolution container 352 is located above a predetermined water level of the circulating water W2 stored in the storage unit 116. And the upper part of the container main body 160 of the 2nd dissolution container 352 is opened, and it has the positional relationship facing the water supply port of the water supply valve 139.

  When the cooling tower 120 is in operation, the water supply valve 139 is opened when the water level of the storage part 116 falls below a predetermined water level due to evaporation and scattering of the circulating water W2, and the replenishment water W1 is supplied to the storage part 116. Since the second dissolution container 352 is disposed in the flow path of the makeup water W1, the makeup water W1 supplied from the water supply valve 139 is supplied into the second dissolution container 352. The second solid medicine 165b is dissolved by the replenishing water W1, and the medicine solution W10 is injected into the circulating water W2 of the storage section 116 from the opening 161.

  When the cooling tower 120 is stopped, the predetermined water level does not normally drop as the make-up water W1 is supplied, so the make-up water W1 is not supplied to the second dissolution vessel 352. That is, the chemical injection of the chemical solution W10 by the second dissolution container 352 is performed when the cooling tower 120 is in operation. Thus, also in the chemical injection device 350 of the third embodiment, the cooling tower 120 includes the first dissolution container 151 that constantly performs chemical injection and the second dissolution container 352 that performs chemical injection when the cooling tower 120 is in operation. The dosage is appropriately adjusted according to the situation of operation and stoppage.

  According to the chemical injection device 350 of the third embodiment described above, the following effects can be obtained. The chemical injection device 350 has a first dissolution container 151 for immersing the first solid medicine 165a in the circulating water W2 stored in the cooling tower 120 and a flow path for the replenishing water W1 replenished when the cooling tower 120 is in operation. A second dissolution vessel 352 disposed. Thereby, when the cooling tower 120 is in operation, the second dissolution container 352 is disposed in the flow path through which the makeup water W1 flows, so that appropriate chemical injection according to the amount of water supply can be performed when the cooling tower 120 is in operation. . For example, even when the load during operation of the cooling system 301 is high in summer or the like and the replenishment water W1 is frequently supplied, the chemical injection according to the amount of the replenishment water W1 is performed, so the quality of the circulating water W2 is reduced. It can be maintained in a more appropriate state depending on the load of the cooling system 301.

  In the third embodiment, the configuration in which the makeup water W1 is supplied by the ball tap type water supply unit 137 has been described as an example. However, the method for supplying the makeup water W1 can be changed as appropriate. For example, a water supply device that detects a water storage level of the storage unit 116 with a water level sensor and controls an on-off valve provided in the makeup water line according to the detected water level is used to supply a supplementary water flow path that is supplied through the makeup water line. Two dissolution vessels 352 can also be arranged.

<Fourth embodiment>
Next, the chemical injection device 450 of 4th Embodiment is demonstrated. FIG. 4 is a diagram schematically showing a cooling system 401 to which the drug injection device 450 of the fourth embodiment is applied. In addition, about the structure similar to 1st Embodiment, the same code | symbol may be attached | subjected to drawing and the description may be abbreviate | omitted.

  The chemical injection device 450 of the fourth embodiment includes a first dissolution container 151 disposed in the storage section 116 of the tower main body 121 and a second dissolution container 452 disposed above the storage section 116. Each of the first dissolution container 151 and the second dissolution container 452 has the same configuration as the first dissolution container 151 and the second dissolution container 152 of the first embodiment.

  The location of the second dissolution container 452 will be described. The second dissolution container 452 of the fourth embodiment is supported between the filler 147 and below the fan 149 inside the tower body 121 by a fixture (not shown). And the 2nd dissolution container 452 is located above the liquid level (storage part 116) of the circulating water W2 stored inside the cooling tower 120. FIG.

  When the cooling tower 120 is in operation, the relative humidity of the internal space of the tower body 121 increases due to the evaporation of the circulating water W2. In this embodiment, the relative humidity inside the tower main body 121 reaches 60% (at low load) to 100% (at high load). In the second dissolution container 452 of the fourth embodiment, the second solid drug 165b is dissolved by the increase in the relative humidity, and the drug solution W10 flows out from the opening 161. That is, the circulating water W2 evaporates, becomes steam, moves to the second dissolution container 452, and is absorbed by the second solid drug 165b, whereby the dissolution of the second solid drug 165b starts.

  The second melting container 452 is disposed below the fan 149, which is a path for airflow generated by the rotational drive of the fan 149. That is, the chemical injection device 450 of the fourth embodiment is disposed at a position where the water that moves as steam when the cooling tower 120 is operated is easily collected, and dissolves the second solid medicine 165b using the increase in humidity. It is possible to carry out efficiently.

  As mentioned above, although each preferable embodiment of the chemical injection apparatus of this invention was described, this invention is not restrict | limited to the above-mentioned embodiment, It can change suitably.

  In the above embodiment, the first dissolution container 151 that immerses a part of the first solid drug 165a in the circulating water W2 has been described as an example. However, the entire first solid drug 165a may be immersed in the circulating water W2. . Moreover, although the fixed 1st dissolution container 151 is used, the float type thing which floats in the circulating water W2 of the storage part 116 can also be used. Moreover, in 1st Embodiment, although it is the structure which has fixed the 2nd dissolution container 152 to the watering tank 145 via the fixing tool 179, you may comprise so that it may be installed in the bottom part of the watering tank 145.

  Moreover, in the said embodiment, although the 1st dissolution container and the 2nd dissolution container are the structures each arrange | positioned one each, it is not limited to this structure. A plurality of either or both of the first dissolution container and the second dissolution container may be arranged. Further, the second dissolution containers 152, 252, 352, and 452 shown in the first to fourth embodiments may be used in combination. Thus, the number, the shape of the container, the fixing method and the structure, etc. of the first dissolution container and the second dissolution container can be appropriately changed according to the circumstances.

  In the above embodiment, the first solid drug 165a and the second solid drug 165b are obtained by stacking a plurality of tablets, but a single solid drug can also be used. Moreover, in the said embodiment, although the same kind of chemical | medical agent was used for the 1st solid chemical | medical agent 165a and the 2nd solid chemical | medical agent 165b, a different chemical | medical agent can also be used by a 1st solid chemical | medical agent and a 2nd solid chemical | medical agent. As described above, the number, shape, arrangement method, configuration, and the like of the first solid drug and the second solid drug can be appropriately changed according to circumstances.

  In the said embodiment, the cooling tower 120 was shown about the example comprised as an open type cooling tower. Not limited to this example, the cooling tower 120 may be configured as a hermetic cooling tower.

DESCRIPTION OF SYMBOLS 120 Cooling tower 131 Cooled apparatus 145 Sprinkling tank 150 Chemical injection apparatus 151 1st melt | dissolution container 152 2nd melt | dissolution container 165a 1st solid chemical | medical agent 165b 2nd solid chemical | medical agent L110 Circulation line L200 Branch line W1 Supplementary water W2 Circulating water

Claims (4)

A chemical injection device that performs chemical injection to circulating water that is cooled by a cooling tower and supplied to an apparatus to be cooled,
A first dissolution container for immersing the first solid drug in circulating water stored in the cooling tower;
A second dissolution container for dissolving the second solid drug by using water movement during operation of the cooling tower;
A chemical injection device comprising: The second dissolution container includes
The chemical injection apparatus of Claim 1 arrange | positioned at the watering tank which the said cooling tower has. The second dissolution container includes
The chemical injection device according to claim 1 or 2, wherein the chemical injection device is branched from a circulation line through which the circulating water circulates and is arranged on a branch line connected to the inside of the cooling tower. The second dissolution container includes
The chemical injection device according to any one of claims 1 to 3, wherein the chemical injection device is disposed in a flow path of makeup water that is replenished when the cooling tower is in operation.

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