JP6328897B2 - Electrolyte hyposulfite generator - Google Patents

Description

  The present invention relates to an apparatus for producing electrolytic hyponitrous acid.

  When electrolyzing salt water to produce electrolytic hyposulfite, hydrogen gas is generated during the electrolysis process. Hydrogen gas has an extremely low ignition energy, and if the concentration in the air is 4 to 75%, there is a risk of explosion. Therefore, the hydrogen gas generated during electrolysis must be properly treated. In this regard, for example, in the electrolytic sub-sulfur generation device described in Patent Document 1, a dilution gas is continuously supplied to an electrolytic cell for electrolysis by a dilution gas supply means, and hydrogen gas generated in the electrolytic cell is diluted with a dilution gas. The concentration is reduced by reducing the concentration, and the diluted hydrogen gas is released to the outside of the electrolytic cell.

Japanese Patent No. 36552532

  In the above-described conventional electrolytic hyponitrous generation device, when the supply of the dilution gas from the dilution gas supply means to the electrolytic cell is stopped due to some trouble, the hydrogen gas is no longer diluted with the dilution gas. May increase. In addition, even when the pipe for releasing hydrogen gas from the electrolytic cell to the outside is blocked, the hydrogen gas is not released, so that the concentration of hydrogen gas in the electrolytic cell becomes high, and the risk of explosion may increase. Therefore, further improvements in safety have been demanded in the electrolytic sub-sulfur generation device regarding the handling of hydrogen gas.

  An object of the present invention is to provide a hypochlorous acid generation device capable of improving safety.

  An apparatus for producing hypochlorous acid according to one aspect of the present invention is an apparatus for producing hypochlorous acid that electrolyzes salt water to produce electrolyzed hyposulfite, and introduces salt water to electrolyze the salt water, An electrolysis section for generating electrolytic hyponitrous acid and hydrogen gas, and an electrolysis section for introducing electrolytic hyponitrous acid and hydrogen gas generated in the electrolysis section to store the electrolytic hyposulfite and discharge the hydrogen gas. A storage tank, a gas supply unit that supplies gas to the storage tank, and a flow rate monitoring unit that monitors a flow rate of gas supplied from the gas supply unit to the storage tank.

  In this electrolytic hyponitrous generator, the flow rate of the gas supplied from the gas supply unit to the storage tank is monitored. For example, when the gas supply from the gas supply unit is stopped due to a failure of the gas supply unit, the gas flow rate changes. For example, when the discharge part provided in the storage tank is blocked, the hydrogen gas is not released from the storage tank, so that the flow rate of the gas supplied to the storage tank changes. Therefore, in the electrolytic hyponitrous generator, the flow rate of gas is monitored by the flow rate monitoring unit. Thereby, in the electrolytic hyponitrous generator, since various situations in which the concentration of hydrogen gas can increase can be detected, an increase in the concentration of hydrogen gas can be prevented in advance. As a result, safety can be improved.

  In one embodiment, a connecting pipe that connects the storage tank and the gas supply unit may be provided, and the flow rate monitoring unit may monitor the flow rate of the gas flowing through the connecting pipe. When a situation such as stoppage of gas supply from the gas supply unit, blockage of the connection pipe, or blockage of the discharge unit occurs, the flow rate of the gas flowing through the connection pipe changes. Therefore, in the electrolytic hyponitrous generation device, it is possible to reliably detect various situations in which the concentration of hydrogen gas increases by monitoring the flow rate of the gas flowing through the connecting pipe.

  In one embodiment, a power source for supplying power to the electrolysis unit is provided, and the flow rate monitoring unit is changed from the power source to the electrolysis unit when a change occurs in the flow rate of the gas supplied from the gas supply unit to the storage tank. The power supply may be cut off. As a result, in the electrolytic hyponitrous generation device, when a change occurs in the flow rate of the gas supplied from the gas supply unit to the storage tank, the power supply to the electrolysis unit is interrupted. Operation stops. Therefore, in the electrolytic hyponitrous generation device, when a situation in which the concentration of hydrogen gas can increase occurs, the generation of hydrogen gas is stopped, so that an increase in the concentration of hydrogen gas can be suppressed.

  In one embodiment, the flow rate monitoring unit is provided in the connection pipe, and an orifice that restricts the flow path of the connection pipe, and a pressure detection unit that detects a pressure difference between the upstream and downstream of the gas flow across the orifice. The power supply from the power source to the electrolysis unit may be cut off when the pressure difference detected by the pressure detection unit falls below a predetermined threshold. In this way, the flow rate monitoring unit detects the pressure difference between the upstream and downstream of the gas flow across the orifice, and compares this pressure difference with the threshold value to reliably capture the change in the gas flow rate. Can do.

  In one embodiment, the pressure detection part may be provided in two or more places in the connecting pipe. Thereby, for example, even when an abnormality occurs in one of the pressure detection units and the operation does not occur, the other pressure detection unit operates normally. As described above, in the electrolytic hyponitrous generation device, the flow monitoring unit has a fail-safe function, and therefore, further improvement in safety can be achieved.

  According to the present invention, safety can be improved.

It is a figure which shows typically the structure of the electrolytic sub-sulfur generating apparatus which concerns on one Embodiment. It is a figure which shows the structure of an electrolysis part. It is a figure which shows the structure of an orifice. It is a figure which shows the structure of a pressure switch typically.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  FIG. 1 is a diagram schematically illustrating a configuration of an electrolytic sub-sulfur generation device according to an embodiment. The electrolyzed sub-sulfur generating apparatus 1 shown in FIG. 1 is an apparatus that electrolyzes salt water to generate electrolyzed sub-sulfur. The electrolytic hyponitrous generator 1 includes an electrolysis unit 3, an electrolytic sublimation tank (storage tank) 5, an air supply pump (gas supply unit) 7, a flow rate monitoring unit 9, and a power source 11. ing. The overall operation of the electrolytic hyponitrous generator 1 is controlled by a control unit (not shown).

  The electrolysis unit 3 introduces salt water to electrolyze the salt water to generate electrolytic hyponitrous acid and hydrogen gas. Salt water is supplied to the electrolysis unit 3 from a salt water tank (not shown) via the salt water transport pipe T1. Specifically, salt water supplied from a salt water tank is diluted with water to the electrolysis unit 3, and salt water having a concentration of about 3% is supplied.

  FIG. 2 is a diagram illustrating an electrolysis unit. As shown in FIG. 2, the electrolysis unit 3 includes an electrode cylinder 30 and an electrode rod 32. The electrode cylinder 30 has a cylindrical shape, and is made of, for example, titanium. A catalyst 30 a for increasing the chlorine generation efficiency is formed inside the electrode cylinder 30. The catalyst 30a is formed of a stable noble metal such as platinum, iridium oxide, or ruthenium oxide. The electrode rod 32 is a rod-shaped member and is made of, for example, titanium. The electrode bar 32 is disposed in the internal space S of the electrode cylinder 30. Specifically, a pair of first and second fixing portions 34 and 36 are fitted to both ends of the electrode cylinder 30, and the electrode rod 32 has a pair of first and second fixing portions at both ends. 34 and 36 are fixed. As a result, the electrode rod 32 is disposed in the internal space S of the electrode cylinder 30 so as to face the electrode cylinder 30 at a predetermined interval.

  The first fixing portion 34 is provided with an introduction portion 34a for introducing salt water. A salt water transport pipe T1 that connects the salt water tank and the electrolysis unit 3 is connected to the introduction unit 34a. The second fixing portion 36 is provided with a lead-out portion 36a for leading the electrolytic hyponitrous acid and hydrogen gas. The derivation unit 36a is connected to a hyponitrous transfer pipe T2 that connects the electrolysis unit 3 and the electrolytic hyponitrous tank 5.

  In the electrolysis unit 3, when a voltage is applied to each of the electrode cylinder 30 and the electrode bar 32 by the power supply 11 (in this embodiment, a positive electrode is applied to the electrode cylinder 30 and a negative electrode is applied to the electrode bar 32), the electrode cylinder 30. A current flows between the electrode rod 32 and the electrode rod 32, the salt water present in the inner space S of the electrode cylinder 30 is electrolyzed, and electrolytic hyponitrous acid and hydrogen gas are generated. The electrolytic hyponitrous acid and hydrogen gas generated by the electrolysis unit 3 are sent to the electrolytic sublimation tank 5 through the sublimation transport pipe T2 via the lead-out unit 36a. In addition, in the electrolysis part 3, oxygen is also produced | generated besides hydrogen gas.

  The electrolytic hyponitrous tank 5 stores electrolytic hyponitrous water. The electrolytic hyponitrous tank 5 is supplied with electrolytic hyponitrous acid and hydrogen gas from the electrolysis unit 3. The electrolytic hyponitrous tank 5 has a gas discharge pipe (discharge section) T3 that discharges hydrogen gas. The gas release pipe T3 is a pipe that discharges hydrogen gas to the outside (for example, outside the building in which the electrolytic hyponitrous generator 1 is disposed). A base end portion of the gas discharge pipe T3 is connected to an upper portion of the electrolytic hyponitrous tank 5. Thereby, the hydrogen gas which accumulates in the upper part of the electrolytic hyponitrous tank 5 is discharged | emitted outside via the gas discharge pipe T3. Connected to the electrolytic hyponitrous tank 5 is a hyponitrous supply pipe T <b> 4 for supplying electrolytic hyposulfite. The electrolytic hyponitrous acid derived through the hyponitrous supply pipe T4 is diluted with water to a predetermined concentration, for example, and supplied to the user.

  The air supply pump 7 supplies air (gas) to the electrolytic hyponitrous tank 5. The air supply pump 7 and the electrolytic hyponitrous tank 5 are connected by an air carrier pipe (connection pipe) T5. The air carrying pipe T5 is connected to the upper part of the electrolytic hyponitrous tank 5. The amount of air supplied from the air supply pump 7 is controlled by the control unit. The air supplied from the air supply pump 7 flows into the electrolytic hyponitrous tank 5 through the air carrier pipe T5, dilutes the hydrogen gas, and releases the hydrogen gas diluted by the pressure from the gas discharge pipe T3. .

  The flow rate monitoring unit 9 monitors the flow rate of the air supplied from the air supply pump 7 to the electrolytic hyponitrous tank 5. The flow rate monitoring unit 9 includes an orifice 15 and a pressure switch 17. FIG. 3 is a diagram showing an orifice. FIG. 3A is a view of the orifice 15 as seen from the air flow direction, and FIG. 3B is a view showing a cross-sectional configuration of the orifice 15. As shown in FIG. 1, the orifice 15 is provided in the air conveyance pipe T5. In the present embodiment, an orifice portion 18 is provided between the air carrier tube T5 and the air carrier tube T5 so that the two air carrier tubes T5 communicate with each other. The orifice portion 18 is provided with the orifice portion 18. As shown in FIG. 3, the orifice 15 is an annular plate-like member and restricts the gas flow path.

  FIG. 4 is a diagram schematically showing the configuration of the pressure switch. As shown in FIG. 4, the pressure switch 17 includes a pressure detection unit 19 and a switch unit 21. Here, pressure detection tubes T6 and T7 are connected to the orifice portion 18 at two locations, upstream and downstream, of the gas flow sandwiching the orifice 15, respectively. Specifically, the pressure detection tubes T6 and T7 are connected to connection portions H1 and H2 provided in the orifice portion 18, respectively.

  The pressure detector 19 detects the pressure difference between the upstream and downstream of the gas flow across the orifice 15. In the present embodiment, the pressure detection unit 19 includes a diaphragm 20. The pressure detector 19 detects the differential pressure of the air flowing in through the pressure detection tubes T6 and T7 by the diaphragm 20. Specifically, the pressure detection unit 19 has air flowing into each of the two spaces S1 and S2 partitioned by the diaphragm 20 from the pressure detection tubes T6 and T7, and when the differential pressure changes to the air, that is, When a change occurs in the air flow rate, the diaphragm 20 changes due to the differential pressure. That is, in the pressure detection unit 19, the diaphragm 20 changes when the pressure difference falls below a predetermined threshold value. At this time, the pressure detection unit 19 mechanically turns off the switch unit 21.

  When the switch unit 21 is turned off by the pressure detection unit 19, the switch unit 21 blocks the electric circuit EL that connects the electrolysis unit 3 and the power source 11. That is, the flow rate monitoring unit 9 shuts off the supply of power from the power source 11 to the electrolysis unit 3 when the pressure detection unit 19 detects a decrease in pressure difference (a decrease in air flow rate).

  In the present embodiment, as shown in FIG. 3A, two sets of pressure detection tubes T6 and T7 are connected to the orifice portion 18. A pressure detection unit 19 is connected to each of the pressure detection tubes T6 and T7 of each group. That is, in this embodiment, two pressure switches 17 are provided.

  The power source 11 supplies power to the electrolysis unit 3. Specifically, the power supply 11 applies a voltage to each of the electrode cylinder 30 and the electrode rod 32 of the electrolysis unit 3.

  Then, operation | movement of the electrolytic hyponitrous generator 1 is demonstrated, referring FIG. First, in the electrolysis part 3, salt water is introduced and electrolysis is performed. As for the electrolytic hyponitrous acid and hydrogen gas generated by the electrolysis unit 3, the electrolytic hyponitrous acid and hydrogen gas are supplied to the electrolytic hyponitrous tank 5. The electrolytic hypochlorite introduced into the electrolytic hypochlorite tank 5 is stored in this tank, and the hydrogen gas is diluted by the air supplied from the air supply pump 7 and released from the gas discharge pipe T3.

  Here, for example, when a situation such as a stop of air supply due to a failure of the air supply pump 7, a blockage of the air transfer pipe T5, or a blockage of the gas discharge pipe T3 occurs, the flow rate of the air flowing through the air transfer pipe T5 changes Occurs. At this time, in the flow rate monitoring unit 9, the diaphragm 20 is changed by the change in the differential pressure in the pressure detection unit 19, and the switch unit 21 is turned off. Thereby, the electric circuit EL which connects the power supply 11 and the electrolysis part 3 is interrupted | blocked, and the supply of the electric power from the power supply 11 to the electrolysis part 3 is interrupted | blocked. As a result, the electrolysis in the electrolysis unit 3 stops.

  As explained above, in the electrolytic hypoxia production | generation apparatus 1 of this embodiment, the flow volume of the air supplied from the air supply pump 7 to the electrolytic hyponitrous tank 5 is monitored. For example, when the supply of air from the air supply pump 7 is stopped due to a failure of the air supply pump 7 or the like, the air flow rate changes. Further, for example, when the gas discharge pipe T3 provided in the electrolytic sub-sulfur tank 5 is closed, hydrogen gas is not released from the electrolytic sub-sulfur tank 5 and is supplied to the electrolytic sub-sulfur tank 5. A change occurs in the air flow rate. Therefore, in the electrolytic hyponitrous generator 1, the flow rate of the gas is monitored by the flow rate monitoring unit 9. Thereby, in the electrolytic hyponitrous generator 1, since various situations in which the concentration of hydrogen gas can increase can be detected, an increase in the concentration of hydrogen gas can be prevented in advance. As a result, safety can be improved.

  In the present embodiment, the electrolytic hyponitrous tank 5 and the air supply pump 7 are connected by an air transport pipe T5, and the flow rate monitoring unit 9 monitors the flow rate of the gas flowing through the air transport pipe T5. When a situation such as the stop of air supply from the air supply pump 7, the blockage of the air transfer pipe T5, or the blockage of the gas discharge pipe T3 occurs, the flow rate of the air flowing through the air transfer pipe T5 changes. Therefore, in the electrolytic hyponitrous generation device 1, it is possible to reliably detect various situations in which the concentration of hydrogen gas increases by monitoring the flow rate of the air flowing through the air transport pipe T5.

  In the present embodiment, the flow rate monitoring unit 9 supplies power from the power source 11 to the electrolysis unit 3 when a change occurs in the flow rate of air supplied from the air supply pump 7 to the electrolytic hyponitrous tank 5. Cut off. As a result, in the electrolyzed hyposulfur generation device 1, when a change occurs in the flow rate of the air supplied from the air supply pump 7 to the electrolyzed hypo sewer tank 5, power supply to the electrolysis unit 3 is interrupted. Therefore, the operation of the electrolysis unit 3 is stopped. Therefore, in the electrolytic hyponitrous generation device 1, when a situation in which the concentration of hydrogen gas may increase occurs, the generation of hydrogen gas is stopped, so that an increase in the concentration of hydrogen gas can be suppressed.

  In the present embodiment, the flow rate monitoring unit 9 includes an orifice 15 that restricts the flow path of the air transport pipe T5, and a pressure detection unit 19 that detects a pressure difference between the upstream and downstream of the air flow across the orifice 15. doing. In this configuration, when the pressure difference detected by the pressure detection unit 19 falls below a predetermined threshold, that is, when the diaphragm 20 changes, the supply of power from the power supply 11 to the electrolysis unit 3 is cut off. In this way, the flow rate monitoring unit 9 detects the pressure difference between the upstream and downstream of the air flow across the orifice 15, and the diaphragm 20 is displaced by this pressure difference, thereby reliably changing the air flow rate. Can be caught.

  In the present embodiment, the pressure detectors 19 are provided at two places (two) in the air transport pipe T5. Thereby, for example, even when an abnormality occurs in one pressure detection unit 19 and it does not operate, the other pressure detection unit 19 operates normally. In this way, in the electrolytic hyponitrous generator 1, since the flow monitoring unit 9 has a fail-safe function, further improvement in safety can be achieved.

  The present invention is not limited to the above embodiment. For example, in the said embodiment, although the structure which has the electrode cylinder 30 and the electrode rod 32 was demonstrated to the electrolysis part 3 as an example, the structure of the electrolysis part 3 is not limited to this.

  In the above embodiment, the pressure detection unit 19 is described as an example of a means for detecting a change in the air flow rate. However, the detection means for detecting a change in the air flow rate may have other configurations. As the detecting means, for example, a rotating wing that is rotated by the air flowing through the air conveying tube T5 may be provided, and a change in the air flow rate may be detected by the rotation of the rotating wing. Further, as a detecting means, a valve that is arranged in the air conveyance pipe T5 and swings when the flow rate exceeds a certain value is provided, and when the valve is operated, a change in the air flow rate is detected. May be.

  In the said embodiment, although the air supply pump 7 demonstrated the air as an example to the electrolytic hyponitrous tank 5, gas may be other than air. Any gas that dilutes hydrogen gas may be used.

  In the above-described embodiment, the configuration in which the two pressure detection units 19 are provided has been described as an example. However, one or more pressure detection units 19 may be provided.

  In the above embodiment, the flow rate monitoring unit 9 switches the power supply from the power source 11 to the electrolysis unit 3 when a change occurs in the flow rate of the air supplied from the air supply pump 7 to the electrolytic hyponitrous tank 5. Although the structure cut off by the unit 21 has been described as an example, the structure for cutting off the supply of power from the power supply 11 to the electrolysis unit 3 is not limited to this. For example, when a change in differential pressure is detected in a flow rate monitoring unit including a CPU [Central Processing Unit], the flow rate monitoring unit outputs a detection signal (electronic signal), and the power source 11 and the electrolysis unit 3 When the switch provided between the two receives a detection signal, the switch may cut off the supply of power from the power source 11 to the electrolysis unit 3. The point is that the supply of power from the power source 11 to the electrolysis unit 3 may be cut off by the flow rate monitoring unit when a change occurs in the flow rate of the air supplied to the electrolytic hyponitrous tank 5.

  DESCRIPTION OF SYMBOLS 1 ... Electrolytic sub-sulfur production | generation apparatus, 3 ... Electrolysis part, 5 ... Electrolytic sub-sulfur tank (storage tank), 7 ... Air supply pump (gas supply part), 9 ... Flow rate monitoring part, 11 ... Power supply, 15 ... Orifice, 19 ... pressure detector, T3 ... gas discharge pipe (discharge section), T5 ... air carrier pipe (connection pipe).

Claims (6)

An electro-hyposulfuric acid generating device that electrolyzes salt water to produce electrolyzed hypoxia,
An electrolysis unit for introducing the salt water to electrolyze the salt water and generating the electrolytic hyponitrous acid and hydrogen gas;
A storage tank having a discharge portion for discharging the hydrogen gas while introducing the electrolytic hyponitrous water and the hydrogen gas generated in the electrolysis section to store the electrolytic hyposulfite; and
A gas supply unit for supplying gas to the storage tank;
A flow rate monitoring unit for monitoring the flow rate of the gas supplied from the gas supply unit to the storage tank;
A connecting pipe connecting the storage tank and the gas supply unit,
The flow rate monitoring unit is an electrolytic sub-sulfur generation device that monitors the flow rate of the gas flowing through the connection pipe. A power supply for supplying power to the electrolysis unit;
The flow rate monitoring unit shuts off the supply of the power from the power source to the electrolysis unit when a change occurs in the flow rate of the gas supplied from the gas supply unit to the storage tank. An electrohypochlorous acid generator according to claim 1. The flow rate monitoring unit
An orifice provided in the connecting pipe and restricting a flow path of the connecting pipe;
A pressure detection unit that detects a pressure difference between the upstream and downstream of the gas flow across the orifice;
3. The electrolytic hyponitrous acid generation device according to claim 2, wherein when the pressure difference detected by the pressure detection unit falls below a predetermined threshold, the supply of the electric power from the power source to the electrolysis unit is cut off. .   The said pressure detection part is an electrolysis subsulfur generation apparatus of Claim 3 provided in two or more places in the said connection pipe. The flow rate monitoring unit
Provided in the connecting pipe, and having rotating blades rotated by the gas flowing through the connecting pipe;
The electrolytic sub-sewage generation device according to claim 2, wherein supply of the electric power from the power source to the electrolysis unit is cut off based on a change in the flow rate of the gas detected by rotation of the rotary blade. The flow rate monitoring unit
Provided in the connecting pipe, and has a valve that perturbs when the gas is at a certain flow rate or more,
3. The electrolytic hyponitrous acid generation device according to claim 2, wherein the supply of the electric power from the power source to the electrolysis unit is cut off based on the operation of the peristaltic valve.

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