JP3592753B2 - Brine direct electrolysis type sub-liquid generator - Google Patents

Description

[0001]
[Industrial applications]
The present invention has as relates salt water directly electrolytic following gasping generator, again electrolysis supplemented with salt to sodium hypochlorite solution after electrolysis in the electrolytic cell.
[0002]
[Prior art]
Conventionally, in the case of producing hypochlorite for disinfection of tap water or the like, a saline solution having a concentration of about 3% is electrolyzed in an electrolyzer using a saltwater direct electrolysis-type hypochlorite generator, and a hypochlorite solution having a concentration of about 1% is produced. The method of producing sodium chlorite is adopted.
[0003]
[Problems to be solved by the invention]
When hypochlorite is generated by a conventional hypochlorite generator, about 1% of sodium chloride is equivalently converted to sodium hypochlorite, and the remaining about 2% of salt water is contained in the hypochlorite without being used. I do. Then, since the hypochlorite containing about 2% salt water is injected into tap water or the like, about 2% of the salt is wasted, and the consumption of salt used for the production of hypochlorite increases. In addition to this, there is a disadvantage that the cost is increased and the concentration of the salt such as tap water is increased.
[0004]
In addition, the conventional hypochlorite has a low concentration of sodium hypochlorite of about 1% and a low content thereof, so that a large amount of hypochlorite is required when disinfecting tap water or the like. Therefore, there is a problem that the size of the hypo-subsidiary tank for storing the generated hypo-subsidiary liquid is increased, and the cost of the entire equipment is significantly increased.
[0005]
The present invention, according view of the conventional problems, it is possible to effectively utilize the content brine TsugiAeki, it is possible to increase the content of sodium hypochlorite, yet salt water that can generate a low common salt following gasping It is an object of the present invention to provide a direct electrolysis type hypochlorite generator.
[0006]
[Means for Solving the Problems]
The present invention comprises an electrolytic bath 4,5 electrolyzing brine in brine direct electrolytic following gasping generating apparatus by electrolyzing the brine in the electrolytic bath 4 and 5 so as to generate the next gasping, the electrolyte A plurality of tanks 4 , 5 are provided in series, and between the electrolysis tanks 4 , 5 , a salt replenishment means 6 for replenishing the hypochlorite after electrolysis in the electrolysis tank 4 with salt is interposed, and the salt replenishment means 6 is provided. in is obtained so as to electrolyze the following gasping after supplemented with salt again.
[0007]
[Action]
In the present invention, salt supplemented by salt supplement means 6 to the next sub-solution after electrolysis in the electrolytic bath 4 and 5, the following again electrolyzed following gasping in an electrolytic cell 4,5. For this reason, it is possible to easily produce a low sodium hypochlorite solution having a high sodium hypochlorite content content by effectively utilizing the salt water contained. In addition, since the sub-solution after electrolysis is supplemented with the salt content and electrolyzed again , the electrolysis efficiency in the electrolysis tanks 4 and 5 is improved. Further comprising a plurality of electrolytic cells 4 and 5 in a serial manner, since the interposed salt supplement means 6 between the respective electrolytic cells 4 and 5, equipment that comes with the electrolytic bath 4, 5 is reduced.
[0008]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 illustrates a first embodiment of a brine direct electrolysis type hypochlorite generator according to the present invention, wherein 1 is a water source, 2 is a saturated brine tank, and the saturated brine 2 has a concentration of about 30 to 35%. Saturated salt water is stored. Reference numeral 3 denotes a supply means. The supply means 3 is constituted by a metering pump or the like for supplying the saturated salt water in the saturated salt water tank 2 at a constant rate, and mixes the saturated salt water in the saturated salt water tank 2 with water from the water source 1 to perform electrolysis. About 3% salt water, suitable for
[0009]
Reference numeral 4 denotes a first electrolytic cell, and 5 denotes a second electrolytic cell. Each of these electrolytic cells 4, 5 has a large number of electrodes in the cell. This produces a hypo-sub liquid. Numeral 6 is a salt replenishing means, which comprises the supply means 3 and a mixing means 7 such as a mixing pump interposed between the first electrolytic cell 4 and the second electrolytic cell 5. The resulting hypochlorite is mixed with saturated saline to replenish the hypochlorite with salt, so as to obtain a saltwater having a concentration of about 3% suitable for electrolysis.
[0010]
Exit side of the supply means 3 is connected to the input side of the compounding unit 7 and the entry side of the first electrolytic bath 4, regulating valve 8 is interposed between the supply means 3 and the compounding unit 7, The control valve 8 controls the supply amount of the saturated salt water. Reference numeral 9 denotes a cooling means which is interposed between the first electrolytic cell 4 and the preparation means 7 and which adjusts the temperature of the hypochlorite after electrolysis in the first electrolytic cell 4 for electrolysis in the second electrolytic cell 5. It is forcibly cooled to the temperature. 10 is a hypophosphite solution tank, so as to store the next gasping generated through the second electrolytic bath 5.
[0011]
When a hypochlorite is generated by the brine direct electrolysis type hypochlorite generator having the above-described configuration, the process is performed as follows. First, the salt water from the water source 1 is mixed with the saturated salt water from the saturated salt water tank 2 to make a salt water having a concentration of about 3%, and the salt water is directly electrolyzed in the first electrolytic tank 4 by the electrolytic method to obtain a salt water having a concentration of about 1%. Generate a sub-liquor. Next, the hypochlorite after electrolysis in the first electrolyzer 4 is cooled by a cooling means 9 to a temperature suitable for electrolysis in the second electrolyzer 5 to a temperature suitable for electrolysis in the second electrolyzer 5. Control. This is because the temperature rises during electrolysis in the first electrolytic cell 4 and if the electrolysis is performed again as it is, the electrolytic efficiency in the second electrolytic cell 5 decreases.
[0012]
On the other hand, the saturated salt water in the saturated salt water tank 2 is supplied to the mixing means 7 by a fixed amount by the supply means 3 of the salt content replenishing means 6 to the mixing means 7, and the saturated salt water is added to the hypochlorite generated in the first electrolytic tank 4 by the mixing means 7. Mix and replenish the hypochlorite with salt to a concentration of about 3%. That is, since the concentration of the salt solution in the hypochlorite generated in the first electrolytic cell 4 is about 2%, a predetermined amount of saturated salt solution having a concentration of 30% is mixed with the solution, and the concentration of the salt solution is reduced. Raise it to about 3% suitable for electrolysis in the second electrolytic cell 5.
[0013]
Then, the hypochlorite having a salt water concentration of about 3% is sent to the second electrolysis tank 5 and electrolyzed again in the second electrolysis tank 5 to generate a hypochlorite. Then, in the second electrolytic cell 5, about 1% of salt water is equivalently converted into sodium hypochlorite, and the concentration of the hypochlorite passing through the second electrolytic cell 5 is increased to about 2%.
[0014]
In this manner, the hypochlorite generated in the first electrolytic cell 4 is replenished with salt, the salt concentration is increased to about 3%, and then electrolysis is performed again in the second electrolytic tank 5 to generate the hypochlorite. Thus, the hypochlorite passed through the second electrolytic cell 5 contains about 2% sodium hypochlorite. Accordingly, whereby it is possible to up the content ratio of sodium hypochlorite, it is possible to effectively utilize the content saline to generate the next gasping, it is possible to significantly reduce the consumption of salt . Further, the concentration of the salt water in the hypochlorite passed through the second electrolytic cell 5 is about 2%, but the content of sodium hypochlorite in the hypochlorite increases, so that the salt water content relatively decreases. In other words, a low-saline hypochlorite can be generated.
[0015]
Moreover, since the content of sodium hypochlorite in TsugiAeki comes up, when storing the next sub liquid after generating the hypochlorite solution tank 10 is also to reduce the volume of the next sub-tank 10 It is possible to reduce the cost of the entire equipment. The first next gasping generated in the electrolytic bath 4 construed as re conductive by feeding to the second electrolytic bath 5 Runode not, salinity by salinity supplement means 6 before being sent to the second electrolytic bath 5 to the next sub-liquid Is replenished into salt water having a concentration of about 3%, so that the electrolysis can be efficiently performed even in the second electrolyzer 5.
[0016]
In addition, since the hypochlorite after electrolysis in the first electrolyzer 4 is cooled by the cooling means 9, the electrolysis efficiency in the second electrolyzer 5 can be improved from the viewpoint of temperature. For this reason, the running cost can be significantly reduced in combination with the reduction in the consumption of salt.
[0017]
FIG. 2 illustrates a secondary sub-solution of the salt water direct electrolysis type hypo-sub-liquid producing apparatus according to the present invention, which is provided between the outlet side of the blending section 7a of the blending means 7 and the inlet side of the first electrolytic cell 4. Circulation paths 11 and 12 are provided between the outlet side of the second electrolytic cell 5 and the inlet side of the saturated salt water of the mixing means 7, respectively. Each of the circulation paths 11 and 12 is provided with circulation pumps 13 and 14 and on-off valves 15 and 16, etc., and a part of the hypochlorite passed through each of the electrolysis tanks 4 and 5 is passed through the circulation paths 11 and 12 to each of the electrolysis paths. While being returned from the outlet side of the tanks 4 and 5 to the inlet side and circulated, the hypochlorite is supplemented with salt, and the electrolysis is repeated in each of the electrolytic tanks 4 and 5.
[0018]
Each of the circulation pumps 13 and 14 and the on-off valves 15 and 16 can be selectively operated or opened and closed as necessary so that the content of sodium hypochlorite in the hypochlorite to be produced can be appropriately adjusted. It has become.
[0019]
In this embodiment, the hypochlorite after being electrolyzed and generated in each of the electrolytic cells 4 and 5 is returned to the inlet side of each of the electrolytic cells 4 and 5 via the circulation paths 11 and 12 and circulated, while Since the electrolysis is carried out in 4,5, even when the content of sodium hypochlorite in the final hypochlorite is to be increased, compared to the case where a large number of electrolysis tanks 4,5 are installed in multiple stages in series. Thus, the entire equipment can be reduced in size. Therefore, installation in a small space is possible.
[0020]
The embodiments of the present invention have been described above, but the present invention is not limited to the embodiments. For example, in the first embodiment, the cooling means 9 may be provided between the compounding unit 7 Doo electrolytic bath 4, 5. A mixing tank may be used as the mixing means 7 of the salt replenishing means 6, and the hypochlorite and the saturated salt water may be mixed in the mixing tank. In the case of the second embodiment, the second electrolytic cell 5 may be omitted, and circulation may be performed only in the first electrolytic cell 4.
[0021]
Further, in each embodiment, a plurality of electrolytic cells 4, 5 may be provided in multiple stages in series, and N electrolytic cells 4, 5 are provided, and electrolysis is repeated N times while replenishing salt. If this is the case, it is possible to generate a hypochlorite having a concentration substantially proportional to the number of times of the electrolysis. Further, in the embodiment, the saturated salt water from the saturated salt water tank 2 is also used for replenishing the salt, thereby simplifying the entire equipment. However, this may be provided separately.
[0022]
【The invention's effect】
According to the present invention, including the electrolytic bath 4, 5 electrolyzing brine in brine direct electrolytic following gasping generating apparatus by electrolyzing the brine in the electrolytic bath 4 and 5 so as to generate the next gasping, wherein comprising a plurality of electrolytic cells 4 and 5 in series form, between the electrolytic bath 4 and 5, interposed salinity supplement means 6 for replenishing the salt into sodium hypochlorite solution after electrolysis in the electrolytic bath 4, the salt content Since the hypochlorite after replenishing the salt with the replenishing means 6 is electrolyzed again , the salt water contained in the hypochlorite can be effectively used, and the sodium hypochlorite content can be increased, In addition, low salt hypochlorite can be generated.
[Brief description of the drawings]
FIG. 1 is a configuration diagram illustrating a first embodiment of the present invention.
FIG. 2 is a configuration diagram illustrating a second embodiment of the present invention;
[Explanation of symbols]
1 water source
2 Saturated salt water tank
3 Supply means
4 First electrolytic cell
5 Second electrolytic cell
6 Salt replenishment means
7 Mixing means
9 Cooling means
11,12 circuit

Claims (3)

Comprising electrolytic cell electrolyzing brine (4) (5), the electrolytic bath (4) (5) brine direct electrolytic following gasping generating apparatus adapted to generate the next gasping by electrolyzing the brine in, wherein comprising a plurality electrolytic cell (4) (5) in a serial manner, electrolytic tank (4) between (5), salt replenishing means for replenishing the salt into sodium hypochlorite solution after electrolysis in an electrolytic cell (4) ( 6) interposed, brine direct electrolytic following gasping generating device is characterized in that so as to electrolyze the following gasping after supplemented with salt again salt content supplement means (6). The electrolytic cell (4) so that the hypochlorite after electrolysis in the electrolytic cells (4) and (5) is replenished with salt by the salt replenishing means (6 ) and electrolyzed again in the electrolytic cells (4) and (5 ). (5) circulating path (11) for circulating the hypochlorite solution from the outlet side to the inlet side of (12) brine direct electrolytic hypochlorite solution producing formation apparatus according to claim 1, characterized in that a. 3. A brine direct electrolysis type hypochlorite generation according to claim 1 or 2, wherein a cooling means (9) for cooling to a temperature suitable for electrolysis is provided before the electrolysis of the hypochlorite after electrolysis again. apparatus.

Images