JP2013144281A - Supply device, device for manufacturing tap water including sodium hypochlorite, and method for manufacturing tap water including sodium hypochlorite - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supply device which does not require a large storage tank for containing a required amount of sodium hypochlorite and stably supplies sodium hypochlorite to a supplied site at a specified mass flow.SOLUTION: The supply device includes a storage tank for storing aqueous sodium hypochlorite solution and a supply passage for supplying the aqueous sodium hypochlorite solution to a supplied site, wherein an introduction passage for introducing dilution water is provided on the way of the supply passage to dilute the aqueous sodium hypochlorite solution in the storage tank, and a mixing portion for mixing the solution sodium hypochlorite aqueous in the storage tank with the dilution water to dilute the aqueous sodium hypochlorite solution in the storage tank with the dilution water introduced through the introduction passage and supply it to the supplied site.

Description

  The present invention relates to a supply device, a sodium hypochlorite-containing clean water manufacturing device, and a sodium hypochlorite-containing clean water manufacturing method, for example, a storage tank for storing a sodium hypochlorite aqueous solution, and the storage A supply device comprising a supply pipe for supplying a sodium hypochlorite aqueous solution in a tank to a supply location, a production device for sodium hypochlorite-containing clean water, and sodium hypochlorite using the production device The present invention relates to a method for producing contained water.

  Conventionally, this type of supply device is used to supply the sodium hypochlorite aqueous solution to, for example, an upper water transfer pipe for transferring upper water (for example, Patent Document 1).

JP 2003-80004 A

  By the way, for example, when the clean water is supplied to households, the clean water needs to contain sodium hypochlorite having a predetermined concentration. Accordingly, in the water supply transfer pipe through which the clean water before the sodium hypochlorite aqueous solution is added flows at a predetermined mass flow rate, sodium hypochlorite is in the form of a sodium hypochlorite aqueous solution at the predetermined mass flow rate. It is necessary to supply it stably.

However, when the sodium hypochlorite aqueous solution is transferred to the tap water transfer pipe using the supply device, the sodium hypochlorite aqueous solution is transferred in the transfer process in which the sodium hypochlorite aqueous solution is transferred in the supply pipe. Since gas such as chlorine gas is generated as bubbles from the sodium chlorite aqueous solution, the bubbles adhere to the inner peripheral surface of the supply pipe, and the bubbles gradually aggregate. A portion in which the sodium hypochlorite aqueous solution does not exist is generated in the supply pipe by the amount of the agglomerated bubbles (hereinafter also referred to as “aggregated bubbles”). Therefore, the sodium hypochlorite aqueous solution may not be transferred by the amount of the aggregated bubbles. Accordingly, there is a problem that sodium hypochlorite cannot be stably supplied to the water supply transfer pipe at a predetermined mass flow rate.
In particular, the longer the distance from the storage tank to the clean water transfer pipe, the longer the distance to which the sodium hypochlorite aqueous solution is transferred in the supply pipe, and the sodium hypochlorite aqueous solution in the supply pipe The transfer time becomes longer. As a result, the aggregated bubbles are easily generated in the supply pipe, and the ratio of the aggregated bubbles to the sodium hypochlorite aqueous solution in the supply pipe is likely to be high. Therefore, sodium hypochlorite cannot be supplied more stably at the predetermined mass flow rate through the water supply transfer pipe.

From such a point of view, it is also considered that the generated bubbles are dispersed in the supply pipe and are less likely to aggregate by lowering the concentration of sodium hypochlorite in the sodium hypochlorite aqueous solution stored in the storage tank. It is done. Thereby, generation | occurrence | production of the coagulated bubble in supply piping is suppressed, and sodium hypochlorite can be stably supplied to the said water supply transfer piping with a predetermined | prescribed mass flow rate.
However, in this case, when trying to use the storage tank capable of storing a predetermined amount of sodium hypochlorite, the concentration of sodium hypochlorite in the sodium hypochlorite aqueous solution stored in the storage tank is There is a problem that it is necessary to increase the size of the storage tank by a low amount.

  In view of the above problems, the present invention does not require an excessive storage tank for accommodating a required amount of sodium hypochlorite, and is supplied with sodium hypochlorite at a predetermined mass flow rate. It is an object of the present invention to provide a supply device capable of stably supplying water, a device for producing sodium hypochlorite-containing clean water, and a method for producing sodium hypochlorite-containing clean water.

The present invention is a supply device comprising a storage tank for storing a sodium hypochlorite aqueous solution, and a supply path for supplying the sodium hypochlorite aqueous solution to a supply location,
An introduction path for introducing diluting water for diluting the sodium hypochlorite aqueous solution in the storage tank into the supply path is provided, and the sodium hypochlorite aqueous solution in the storage tank is supplied with the dilution water introduced through the introduction path A supply section comprising a mixing section for mixing the sodium hypochlorite aqueous solution of the storage tank and the dilution water so as to be diluted and supplied to the supply location In the device.

Since such a supply device has such a configuration, the sodium hypochlorite aqueous solution in the storage tank can be diluted with the dilution water. Therefore, even if bubbles are generated, the supply path is dispersed. Aggregation becomes difficult and the generation of aggregated bubbles is suppressed, and sodium hypochlorite can be stably supplied to the supply site at a predetermined mass flow rate. Moreover, the magnitude | size of a storage tank can be made small compared with the case where the sodium hypochlorite aqueous solution diluted from the beginning is stored in a storage tank.
Therefore, such a supply apparatus does not need to provide an excessive storage tank for accommodating a required amount of sodium hypochlorite, and stably stabilizes sodium hypochlorite at a supply location at a predetermined mass flow rate. Can be supplied.

Moreover, this invention supplies the said sodium hypochlorite aqueous solution to the storage tank which stores the sodium hypochlorite aqueous solution, the upper water transfer path which transfers upper water, and the upper water in this upper water transfer path An apparatus for producing sodium hypochlorite-containing clean water that produces sodium hypochlorite-containing clean water within the clean water transfer path by the supply,
The clean water or different clean water is used as dilution water for diluting the sodium hypochlorite aqueous solution in the storage tank, and an introduction path for introducing the diluted water in the middle of the supply path is provided, The sodium hypochlorite aqueous solution in the storage tank and the dilution water so that the sodium hypochlorite aqueous solution in the storage tank can be diluted with the dilution water introduced through the introduction path and supplied to the clean water transfer path. In the apparatus for producing sodium hypochlorite-containing clean water, a mixing section for mixing the water is provided in the supply path.

Furthermore, the present invention provides a storage tank for storing a sodium hypochlorite aqueous solution, a clean water transfer path for transferring clean water, and supplying the sodium hypochlorite aqueous solution to clean water in the clean water transfer path. A method for producing sodium hypochlorite-containing clean water that obtains sodium hypochlorite-containing clean water by the above-mentioned supply using a sodium hypochlorite-containing clean water manufacturing apparatus provided with a supply path,
In the apparatus for producing sodium hypochlorite-containing clean water, the clean water or different clean water is used as dilution water for diluting the sodium hypochlorite aqueous solution in the storage tank. An introduction path is provided in the middle of the supply path, and a mixing unit that mixes the dilution water introduced through the introduction path with the sodium hypochlorite aqueous solution in the storage tank is in the middle of the supply path. Provided is a method for producing sodium hypochlorite-containing clean water comprising supplying a sodium hypochlorite aqueous solution diluted in the mixing section to clean water in the clean water transfer path. .

  As described above, according to the present invention, it is not necessary to provide an excessive storage tank for accommodating a required amount of sodium hypochlorite, and sodium hypochlorite is supplied at a predetermined mass flow rate. It can be stably supplied to the place.

The schematic diagram of the supply device concerning one embodiment. The schematic diagram of the supply device concerning one embodiment.

  Hereinafter, with reference to the attached drawings, a sodium hypochlorite aqueous solution is supplied to clean water in a clean water transfer path for transferring clean water, and clean water containing sodium hypochlorite (sodium hypochlorite) An embodiment of the present invention will be described by taking as an example an aspect of producing (containing clean water).

First, the supply device of this embodiment will be described.
As shown in FIG. 1, the supply apparatus 1 of this embodiment supplies the storage tank 2 which stores a sodium hypochlorite aqueous solution, and the sodium hypochlorite aqueous solution in the storage tank 2 to the tap water transfer path A. The diluting water B is introduced in the middle of the supply path 3 to dilute the sodium hypochlorite aqueous solution (stock solution) in the storage tank 2 and prepare a diluted solution having a lower concentration than the stock solution. And an introduction path 4. Furthermore, the supply apparatus 1 of the present embodiment is configured to dilute the stock solution with the dilution water B introduced through the introduction path 4 and supply the diluted solution to the clean water transfer path A. A mixing section 5 for mixing B is provided in the middle of the supply path 3.

  The clean water transfer path A is composed of a clean water transfer pipe A1 for transferring clean water, and a supply location to which a sodium hypochlorite aqueous solution is supplied is the clean water transfer pipe A1.

  The concentration of sodium hypochlorite in the stock solution is preferably 0.1 mg / L to 1.5 mg / L, more preferably 0.1 mg / L to 0.5 mg / L.

  The supply path 3 includes a first supply path 3a that is upstream of the mixing unit 5 (on the storage tank 2 side) and a second supply that is downstream of the mixing unit 5 (on the water supply transfer pipe A1 side). And a path 3b.

Further, the first supply path 3 a is a path for transferring the stock solution to the mixing unit 5.
Further, the first supply path 3a communicates with the lower part of the storage tank 2 and transfers the stock solution to the mixing unit 5 and transports the stock solution through the first supply pipe 3a1. The first pump 3a2 arranged in the first supply pipe 3a1 and the back pressure valve 3a3 arranged in the first supply pipe 3a1 on the downstream side of the first pump 3a2 are provided. The back pressure valve prevents the flow of liquid when the pressure in the pipe upstream of the back pressure valve is lower than the set pressure, while the pressure in the pipe upstream of the back pressure valve is set. It means a valve through which a liquid flows so as to keep the pressure in the pipe at a set pressure when the pressure is exceeded.
By providing the back pressure valve 3a3, the supply device 1 according to the present embodiment has an advantage that a predetermined pressure can be applied to the stock solution and generation of aggregated bubbles can be suppressed.
The set pressure of the back pressure valve 3a3 is preferably 0.10 to 0.25 MPa, and more preferably 0.10 to 0.15 MPa.

The introduction path 4 is a path for introducing dilution water B for diluting the sodium hypochlorite aqueous solution transferred in the first supply path 3a1 into the mixing unit 5.
The introduction path 4 includes an introduction pipe 4a for transferring the dilution water B to the mixing unit 5, and a first pipe arranged in the introduction pipe 4a so that the dilution water B can be transferred by the introduction pipe 4a. 2 pump 4b.
The dilution water B is water having a concentration of sodium hypochlorite lower than that of the stock solution, and is not particularly limited as long as it does not impair the effects of the present invention. Examples of the dilution water include clean water. . The drinking water used as the dilution water B may be one obtained by collecting the drinking water flowing through the drinking water transfer pipe A1 on the upstream side from the location where the dilution solution is supplied. Moreover, the upper water different from the upper water which distribute | circulates the said upper water transfer piping A1, for example, the upper water stored in the tank may be sufficient.

  The supply device 1 of the present embodiment is configured such that the stock solution and the dilution water B are mixed by the mixing unit 5. Specifically, in the supply device 1 of the present embodiment, the stock solution and the dilution water B are joined and mixed at a joint (cheese) constituting the mixing unit 5 so that the dilution solution is obtained. Further, the diluent is further mixed while being transferred through the second supply path 3b.

  The second supply path 3b is a path for supplying the diluent to the water transfer pipe A1. Specifically, the second supply pipe 3b1 of the second supply path 3b is a pipe that supplies the diluent to the water supply transfer pipe A1.

  That is, the first supply pipe 3 a 1, the second supply pipe 3 b 1, and the introduction pipe 4 a are connected to the joint (cheese) to form a mixing unit 5.

  The length of the first supply pipe 3a1 is preferably shorter than the length of the second supply pipe 3b1. By having such a configuration, the supply device 1 of the present embodiment has an advantage that the distance to which the sodium hypochlorite aqueous solution is transferred in the form of a stock solution is shortened, and aggregated bubbles are less likely to be generated.

  The apparatus for producing sodium hypochlorite-containing clean water of this embodiment includes the supply device 1 of this embodiment and the clean water transfer pipe A1, and the introduction path 4 circulates through the clean water transfer pipe A1. Or a different water is introduced as the dilution water B. The dilution water is supplied to the water in the water transfer pipe A1, and the supply causes a sublimation in the water transfer path A. An apparatus for producing clean water containing sodium chlorate. Specifically, the apparatus for producing sodium hypochlorite-containing clean water according to the present embodiment supplies the diluent to the clean water transfer pipe A1 as the supply location, and the supply of the clean water transfer pipe by the supply. It is an apparatus for producing clean water containing sodium hypochlorite within A1.

  The method for producing sodium hypochlorite-containing clean water according to the present embodiment uses the sodium hypochlorite-containing clean water producing apparatus according to the present embodiment to supply a diluent to the clean water in the clean water transfer pipe A1. Then, this is a method for producing sodium hypochlorite-containing clean water in the clean water transfer pipe A1 by the supply.

  In addition, the supply apparatus of this embodiment, the manufacturing apparatus of sodium hypochlorite containing clean water, and the manufacturing method of sodium hypochlorite containing clean water suppress the generation | occurrence | production of a bubble by the said structure, and hypochlorous acid While it has the advantage that sodium acid can be stably supplied to the supply location at a predetermined flow rate and the storage tank can be made compact, the supply device of the present invention has the above configuration. The design is not limited and can be changed as appropriate.

  For example, as shown in FIG. 2, the clean water transfer path A is a mixing tank A2 that mixes clean water C in the clean water transfer path A and an aqueous sodium hypochlorite solution diluted with the dilution water. It may be configured to obtain sodium hypochlorite-containing clean water D by the mixing tank A2. In the mixing tank A2, a stirrer A3 for stirring the liquid in the mixing tank A2 may be provided. In such an aspect, the said supply location may be said mixing tank A2.

  Moreover, the said to-be-supplied location is not limited to the said water supply transfer piping A1 and the said mixing tank A2, and as this to-be-supplied location, piping of another use, a tank, etc. are mentioned.

  1: supply device, 2: storage tank, 3: supply path, 3a: first supply path, 3a1: first supply pipe, 3a2: first pump, 3a3: back pressure valve, 3b: second supply path, 3b1: first 2 supply pipe, 4: introduction path, 4a: introduction pipe, 4b: second pump, 5: mixing section, A: clean water transfer path, A1: clean water transfer pipe, A2: tank (mixing tank), A3: stirrer , B: dilution water, C: clean water, D: clean water containing sodium hypochlorite

Claims (3)

A supply device comprising a storage tank for storing a sodium hypochlorite aqueous solution, and a supply path for supplying the sodium hypochlorite aqueous solution to a supply location,
An introduction path for introducing diluting water for diluting the sodium hypochlorite aqueous solution in the storage tank into the supply path is provided, and the sodium hypochlorite aqueous solution in the storage tank is supplied with the dilution water introduced through the introduction path A supply section comprising a mixing section for mixing the sodium hypochlorite aqueous solution of the storage tank and the dilution water so as to be diluted and supplied to the supply location apparatus. A storage tank for storing a sodium hypochlorite aqueous solution, a water transfer path for transferring clean water, and a supply path for supplying the sodium hypochlorite aqueous solution to clean water in the clean water transfer path, An apparatus for producing sodium hypochlorite-containing clean water that produces sodium hypochlorite-containing clean water within the clean water transfer path by the supply,
The clean water or different clean water is used as dilution water for diluting the sodium hypochlorite aqueous solution in the storage tank, and an introduction path for introducing the diluted water in the middle of the supply path is provided, The sodium hypochlorite aqueous solution in the storage tank and the dilution water so that the sodium hypochlorite aqueous solution in the storage tank can be diluted with the dilution water introduced through the introduction path and supplied to the clean water transfer path. An apparatus for producing sodium hypochlorite-containing clean water comprising a mixing section for mixing the water in the middle of the supply path. A storage tank for storing a sodium hypochlorite aqueous solution, a water supply transfer route for transferring clean water, and a supply path for supplying the sodium hypochlorite aqueous solution to the clean water in the clean water transfer route are provided. A method for producing sodium hypochlorite-containing clean water using a device for producing sodium hypochlorite-containing clean water to obtain sodium hypochlorite-containing clean water by the supply,
In the apparatus for producing sodium hypochlorite-containing clean water, the clean water or different clean water is used as dilution water for diluting the sodium hypochlorite aqueous solution in the storage tank. An introduction path is provided in the middle of the supply path, and a mixing unit that mixes the dilution water introduced through the introduction path with the sodium hypochlorite aqueous solution in the storage tank is in the middle of the supply path. A method for producing sodium hypochlorite-containing clean water, comprising: supplying a sodium hypochlorite aqueous solution diluted in the mixing section to clean water in the clean water transfer path.

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