WO2002095090A1

WO2002095090A1 - Apparatus for generating mixed gas and boiler system using the mixed gas

Info

Publication number: WO2002095090A1
Application number: PCT/JP2001/010327
Authority: WO
Inventors: Yasuhiro Yamada
Original assignee: Zet Co., Ltd.
Priority date: 2001-05-23
Filing date: 2001-11-27
Publication date: 2002-11-28

Abstract

An apparatus (10) for generating a hydrogen-oxygen mixed gas, wherein water is electrolyzed in an electrolysis tank (13) to form a hydrogen gas and an oxygen gas, the moisture contained in the hydrogen gas and the oxygen gas is removed by a dehumidifier (42), the hydrogen gas and the oxygen gas are mixed uniformly in a gas mixer (43) into the brown gas containing hydrogen and oxygen in a hydrogen : oxygen volume ratio of 2 : 1, the brown gas is branched into a plurality of streams by a mixed gas distributor (41), and one of the plurality of streams is supplied to a burner (48) of a boiler system (100). The apparatus (10) can be used for generating a hydrogen-oxygen mixed gas which is homogeneously admixed.

Description

TECHNICAL FIELD The present invention relates to a mixed gas generator and a boiler device using the mixed gas.

The present invention relates to a mixed gas generation device and a boiler device, and more particularly, to a mixed gas generation device that supplies a large amount of mixed combustible gas to a metal cutting and welding device or a boiler device, and a mixed gas generation device. Boiler equipment that uses mixed gas. Background art

An electrolytic cell of a conventional mixed gas generator houses an electrode unit formed by a plurality of electrode tubes insulated and arranged concentrically, an electrode rod disposed at the center of the electrode unit, and an electrode unit. And a cylindrical main body. An electrolytic solution composed of water and an electrolyte is stored in an electrolytic chamber formed between the electrode cylinders. Water is electrolyzed by applying a positive voltage to the electrode rod and applying a negative voltage to the electrode unit. Oxygen gas is generated from the electrode unit (anode), and hydrogen gas is generated from the electrode rod (cathode). Conventional mixed gas generators have relatively high electrolysis efficiency and generate large amounts of mixed gas of hydrogen and oxygen. The mixed gas is supplied to the metal cutting and welding equipment or the poiler through piping.

However, the conventional mixed gas generator supplies hydrogen and oxygen gas directly from the electrolytic cell to a supply destination device via a pipe. That is, hydrogen and oxygen gas are mixed in the pipe. For this reason, in the conventional mixed gas generator, the composition of the mixed gas was uneven, and the combustion of the mixed gas was unstable, and the desired combustion heat could not be obtained. Disclosure of the invention

An object of the present invention is to provide a mixed gas generator that stably generates a large amount of mixed gas, and a boiler device that uses a large amount of mixed gas.

In order to achieve the above object, in a first aspect of the present invention, the electrolysis of water is used. A mixed gas generator that generates hydrogen gas and oxygen gas is provided. The mixed gas generator includes: an electrolytic cell having a force electrode rod and at least three electrode cylinders disposed around the electrode rod; and a plurality of electrolytic cells containing an electrolytic solution containing water and an electrolyte. And a mixer connected to the plurality of electrolytic cells via a gas supply pipe to uniformly mix the hydrogen gas and the oxygen gas.

According to a second aspect of the present invention, there is provided a boiler device using the mixed gas generated by the mixed gas generator as a fuel. A boiler device for storing the boiler water, a boiler attached to the boiler body, and a combustion device for burning the mixed gas; and A heat exchange element for transmitting combustion heat of the mixed gas to the boiler water to generate high-pressure steam.

According to a third aspect of the present invention, there is provided a boiler device using a mixed gas generated by a mixed gas generator as a fuel. A boiler device having a cylindrical boiler body having a bottom, a combustion device that burns the mixed gas and heats the inside of the boiler body to a predetermined temperature, and an evaporator that is heated by combustion heat of the mixed gas. A water pipe for supplying boiler water to the heated evaporator, wherein the boiler water causes steam explosion in the evaporator to generate high-pressure steam.

According to a fourth aspect of the present invention, there is provided a boiler device using a mixed gas generated by a mixed gas generator as a fuel. A boiler device having a cylindrical poirer body having a bottom, a combustion device that burns the mixed gas and heats the inside of the boiler body to a predetermined temperature, and an evaporator that is heated by combustion heat of the mixed gas. A cooling pipe for supplying a cooling gas to the inside of the boiler main body so as to maintain the inside of the boiler main body at a predetermined temperature; and a water pipe for supplying boiler water to the heated evaporating section. The boiler water evaporates in the evaporator to generate low-pressure steam. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a schematic diagram of a mixed gas generator according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a main body of the mixed gas generator of FIG. FIG. 3A is a longitudinal sectional view of the electrolytic cell of the mixed gas generator of FIG.

FIG. 3B is a cross-sectional view of the electrolytic cell in FIG. 3A.

FIG. 4 is a cross-sectional view of the poiling device of the first embodiment.

FIG. 5 is a sectional view of a boiler device according to a second embodiment.

FIG. 6A is a sectional view of a boiler device according to a third embodiment.

FIG. 6B is a cross-sectional view of the boiler device of the fourth embodiment.

FIG. 7A is a cross-sectional view of a modification of the electrolytic cell.

FIG. 7B is a partially enlarged cross-sectional view of the electrolytic cell of FIG. 7A.

FIG. 7C is a perspective view of the spacer of FIG. BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment)

Hereinafter, the mixed gas generator 10 according to the first embodiment of the present invention will be described. As shown in FIGS. 1, 3A and 3B, the mixed gas generator 10 is composed of a main unit (main unit) 11, a dehumidifier 42, a gas mixer 43, and a mixed gas distributor 41. And The main body 11 includes a case 1 2, a plurality of electrolytic cells 13 contained in the case 12, a power supply unit 14 for supplying electric power for electrolysis to the plurality of electrolytic cells 13, and an electrolytic cell 1. 3 includes a water supply device (pump) 15 that supplies water. Electrolyte water is electrolyzed in the electrolyzer 13. The electrolyte is preferably a hydration power lime.

Electrolyzer 13 is preferably cylindrical. As shown in FIG. 3, a round pillar-shaped electrode rod 21 and an electrolytic cell 16 are arranged in an electrolytic cell 13. The upper opening of the electrolytic cell 13 is closed by a disk-shaped lid 17. The bottom wall 13 a of the electrolytic cell 13 is formed such that the lower end of the electrode rod 21 is exposed to the outside of the electrolytic cell 13. The first, second and third communication pipes 18, 19, 20 are connected to the lower end, the middle, and the upper end of the plurality of electrolytic cells 13, respectively. The first, second and third communication pipes 18, 19, 20 integrate the internal space of the plurality of electrolytic cells 13.

Electrolysis cell 16 is fixed to the lower part of electrode rod 21. The electrolytic cell 16 includes a circular support plate 22 made of an insulating material such as a synthetic resin, and a plurality of electrode tubes 2 supported by the support plate 22. With 3. The plurality of electrode cylinders 23 are arranged concentrically with respect to the electrode rod 21 so as to be spaced from each other by an equal distance in the shape direction. The electrode rod 21 and each electrode tube 23 are preferably made of mild steel having a nickel (Ni) plated surface. The upper end of the electrolytic cell 16 is closed by a lid (not shown). A plurality of electrolysis chambers 24 are defined between the adjacent electrode tubes 23 and between the electrode rod 21 and the innermost electrode tube 23.

The outer peripheral surface of the electrolytic cell 16 is separated from the inner peripheral surface of the electrolytic cell 13. A water passage 27 is formed between the outer peripheral surface of the electrolytic cell 16 and the inner peripheral surface of the electrolytic cell 13. The first communication pipe 18 is connected to the pump 15 via a water pipe 28. The pump 15 supplies water from the lower part of the electrolytic cell 13. Water flows through the water channel 27 and is supplied until the water level reaches almost half of the electrolysis cell 13. Therefore, the entire electrolytic cell 16 is submerged. As shown in FIG. 3A, each electrode tube 23 has two passage holes 29 formed at the same level. As shown in FIG. 3B, all the passage holes 29 are formed on a straight line orthogonal to 21. Water flows into all the electrolysis chambers 24 through the passage holes 29. Since water can move to the adjacent electrolytic cell 13 through the second communication pipe 19, the water level (water amount) in all the electrolytic cells 13 is adjusted equally. The electrolytic cell 13 is provided with a water amount detector 15a for detecting the amount of water. The pump 15 automatically adjusts the water supply amount according to the detection signal of the water amount detector 15a so that the water amount in the electrolytic cell 13 falls within a predetermined range.

The power supply unit 14 is connected to the lower end of the electrode rod 21 and the electrolytic cell 16 via a cable 30. The power supply unit 14 has a polarity converter 14a that inverts the polarity of the voltage applied to the electrode rod 21 and the polarity of the voltage applied to the electrolytic cell 13 at predetermined time intervals. When the polarity converter supplies a positive voltage to the electrode rod 21, it supplies a negative voltage to the electrolytic cell 13. On the other hand, the polarity converter supplies a positive voltage to the electrolytic cell 13 when supplying a negative voltage to the electrode rod 21. In the first embodiment, the power supply unit 14 is driven by a DC power supply, and reverses the polarity of the voltage applied every six hours.

The electrode rod 21 and the electrolytic cell 16 serve as an anode or a cathode depending on the polarity of the applied voltage. Oxygen gas is generated from the anode by electrolysis of water, and hydrogen gas is generated from the cathode Gas is generated. The oxygen gas and the hydrogen gas generated in the plurality of electrolytic cells 13 are joined to the gas transfer pipe 31 via the third communication pipe 20.

A plurality of radiating fins 32 are provided on the outer peripheral wall of each electrolytic cell 13 so as to protrude in the radial direction. The radiation fins 32 efficiently release the heat generated by the electrolysis. The power supply unit 14 has an electrolysis controller 14b. The electrolysis controller 14b stops the voltage supply to at least one of the plurality of electrolyzers 13 at predetermined time intervals. In the first embodiment, power transmission to one electrolytic cell 13 is stopped every 24 hours. The electrodes (electrode rods 21 and electrolytic cells 16) of the electrolytic cell 13 whose power transmission has been stopped are stopped to reduce deterioration over time such as oxidation. In addition, during a period during which power transmission is stopped, an operation of removing impurities such as nickel oxide that is oxidized mainly at the anode and deposited in water during electrolysis is performed.

The electrolysis controller 14b stops power transmission to the electrolyzer 13 when the air pressure in the electrolyzer 13 exceeds 3 kgf Z cm ² and restarts power transmission when the air pressure falls below 2 kgf / cm ² I do. In this way, the production amounts of hydrogen and oxygen gas are adjusted.

The inner surface 33 of the bottom wall 13a of the electrolytic cell 13 is formed in a tapered shape. The tapered inner surface (discharge portion) 3 3 facilitates discharging the deposited impurities to the outside. Specifically, when the electrolytic cell 13 is at rest, the impurities precipitate on the tapered surface 33 and are collected at the center of the bottom wall 13a. The drain pipe 34 is connected to the center of the bottom wall 13a. By opening the drain valve 35, the impurities are discharged from the electrolysis tank 13 via the drain pipe 34 together with the water. The coating material 36 covers a lower portion of the electrode rod 21, that is, a portion between the circular support plate 22 and the lower end of the drain tube 34. The coating material 36 prevents impurities from adhering to the electrode rod 21.

A water separator 37 and a backflow prevention tank 38 are sequentially connected to the gas transfer pipe 31. Water vapor flowing with the hydrogen and oxygen gas is removed by the water drop separator 37. The backflow prevention tank 38 prevents gas from flowing back in the direction of the electrolytic cell 13.

It is preferable that a plurality of electrolytic cells 13, a power supply unit 14, a pump 15, a gas transfer pipe 31, a water drop separator 37, and a backflow prevention tank 38 be assembled in the main body 11. In the embodiment of FIG. 2, six electrolytic cells 13, a power supply unit 14, The separator 37 and the backflow prevention tank 38 are packaged integrally in the case 12. Since six pairs of electrolyzers 13 have three pairs arranged in two rows, the case 12 is space-saving. The main body 11 is movable by casters 39 provided at the bottom of the case 12. The end of the gas transfer pipe 31 is exposed outside the main body 11 and is connected to the gas supply pipe 40.

As shown in FIG. 1, the gas supply pipe 40 connects the dehumidifier 42, the gas mixer 43, and the mixed gas distributor 41. A plurality of barriers (not shown) are formed in the dehumidifier 42 so as to intersect the traveling directions of the hydrogen and oxygen gases. The hydrogen and oxygen gas travel through the dehumidifier 42 while colliding with the obstacle, so that moisture in the hydrogen and oxygen gas is condensed on the surface of the barrier and removed. Since the water content of hydrogen and oxygen gas is removed by the water droplet separator 37 and the dehumidifier 42, high-purity hydrogen and oxygen gas can be obtained. A mixing fan 44 is provided in the gas mixer 43. The mixing fan 44 is disposed so as to be orthogonal to the traveling direction of the hydrogen and oxygen gases. In other words, the rotation axis of the mixing fan 44 matches the flow direction of the hydrogen and oxygen gas. The mixing fan 44 is rotated by the flow of hydrogen and oxygen gas. Therefore, a driving device such as a motor for driving the mixing fan 44 is unnecessary. By the rotation of the mixing fan 44, the hydrogen and oxygen gases are swirled in the gas mixer 43, agitated, and uniformly mixed. As a result, a mixed gas of hydrogen and oxygen (Brown gas) having a hydrogen: oxygen volume ratio of 2: 1 is obtained.

The mixed gas distributor 41 has a case 45, a backflow preventer 46, and a plurality of branch pipes 47. The backflow preventer 46 prevents backflow of the mixed gas from the mixed gas distributor 41 to the gas mixer 43. The plurality of branch pipes 47 distribute the mixed gas to a plurality of devices to be supplied. The burner 48 of the boiler apparatus 100 (FIG. 4) is connected to one branch pipe 47. At the same time, another branch pipe 47 may be connected to a welding machine, a melting furnace, or the like. The plurality of branch pipes 47 eliminates the need to replace the burner 48 with another device (welding machine or melting furnace).

The main body 11, the gas supply pipe 40, the dehumidifier 42, the gas mixer 43, and the distributor 41 form a mixed gas generator 10. Hydrogen and oxygen gas generated in the main body 11 The mixture is dehumidified by a dehumidifier 42, uniformly mixed by a gas mixer 43, and supplied from the mixed gas distributor 1 to a plurality of devices.

Next, the poil device 100 will be described with reference to FIG.

Boiler apparatus 100 includes a boiler body 49 and a combustion furnace. The combustion furnace includes a pair of stainless steel heat exchange elements (smoke tubes) 50 housed in the boiler body 49, and a pair of combustion devices (burners) 48 arranged below the heat exchange elements 50. including.

The boiler body 49 has a cylindrical shape, and its upper end and lower end are sealed by an upper wall 52 and a bottom wall 53. The interior of the boiler body 49 is partitioned into a heating chamber 55 and an exhaust chamber 56 by a partition wall 54. The lower part of the boiler body 49 is surrounded by a cylindrical boiler water supply part 49a. A boiler water supply pipe 57 is connected to a lower portion of the boiler water supply section 49a. The boiler water is supplied into the boiler water supply section 49a through the boiler water supply pipe 57. '

The supply hose 49 b connects the upper part of the boiler water supply part 49 a to the upper part of the boiler body 49. Thereby, the boiler water is supplied from the boiler water supply section 49a to the heating chamber 55 via the supply hose 49b. Boiler water in an amount of about 1 Z 3 of the volume of the heating chamber 55 is stored in the heating chamber 55. In the heating chamber 55, the space above the water surface of the boiler water is a steam chamber 58 filled with steam, and the boiler water is a water section 59.

The smoke tube 50 is supported by a bottom wall 53 and a partition wall 54 of the boiler body 49. The burner burns the mixed gas supplied from the branch pipe 47 of the mixed gas generator 10 and sends a flame into the smoke pipe 50.

'Each burner 4 8 is surrounded by a shield wall 60. Prior to ignition, the shield wall 60 is removed, as in the burner 48 on the right in FIG. After the ignition, the shield wall 60 closes the gap between the burner 48 and the smoke tube 50 as shown in the left burner 48 in FIG. 4, and shuts off the air. The shield wall 60 prevents impurities in the air from being mixed into the mixed gas, and prevents a decrease in combustion temperature. The jig 48 a supports the burner 48 so that the distance between the burner 48 and the smoke tube 50 can be changed. By changing the position of the jig 48a, the position of the flame in the smoke tube 50 can be adjusted. Each smoke pipe 50 is formed by connecting the first divided pipe 61, the second divided pipe 62, and the third divided pipe 63. A first combustion chamber 64a, a second combustion chamber 64b, and a third combustion chamber 64c are formed in the first to third divided pipes 62, 62, 63, respectively. The peripheral walls of the first divided pipe 61, the second divided pipe 62, and the third divided pipe 63 are heat transfer partitions. The heat of combustion of the mixed gas is transferred to the boiler water in the boiler body 49 through each heat transfer partition. The first split tube 61 has a reduced diameter portion 65 having an inner diameter smaller than the inner diameters of the upper and lower portions. The burning core and the internal flame are in the first combustion chamber 64a. The reduced diameter portion 65 narrows the internal flame so that the external flame of the flame reaches the second dividing pipe 62. The first split pipe 61 is heated by the relatively low temperature of the flame core and the internal flame to preheat the boiler water.

The relatively hot outer flame is in the second combustion chamber 64b. The preheated boiler water is calo-heated by the second dividing pipe 62 to become saturated steam. The second dividing pipe 62 thermally contracts due to the temperature difference between the outer flame and the boiler water (saturated steam). Since the bellows 66 formed in the middle part of the second divided pipe 62 absorbs the heat shrinkage, the length of the smoke pipe 50 is maintained at a constant value.

The inner diameter of the third divided pipe 63 is smaller than the inner diameter of the first divided pipe 61 and the second divided pipe 62. The high-temperature exhaust gas generated by the combustion of the mixed gas passes through the third combustion chamber 64c. The third split tube 63 heats the external saturated steam to generate dry high-pressure steam. Plate-shaped heat transfer fins 67 are provided on the outer surfaces of the first divided pipe 61 and the third divided pipe 63. The heat transfer fins 67 improve the heat transfer coefficient from the first divided pipe 61 and the third divided pipe 63 to the boiler water.

A main steam pipe 68 is provided above the boiler body 49. The main steam pipe 68 passes through the exhaust chamber 56 and is connected to the partition wall 54. The high-pressure steam in the steam chamber 58 is sent to a steam utilization facility such as a turbine through a main steam pipe 68. An exhaust pipe 69 is provided on an upper wall 52 of the boiler body 49. Exhaust gas exhausted from the third split pipe 63 is exhausted through the exhaust chamber 56 and the exhaust pipe 69. The exhaust gas passing through the exhaust chamber 56 keeps high-pressure steam passing through the main steam pipe 68. Since the main component of the exhaust gas is water vapor, the exhaust gas may be collected and reused as boiler water or electrolyte. Next, the operation of the mixed gas generator 100 and the boiler 100 will be described. First, water is supplied to each electrolytic cell 13 by a pump 15. By the operation of the power supply unit 14, water is electrolyzed in the electrolytic cell 13 to generate hydrogen gas and oxygen gas. The hydrogen and oxygen gases generated in all the electrolytic cells 13 are collected in a gas transfer pipe 31, pass through a water drop separator 37 and a backflow prevention tank 38, and flow through a gas supply pipe 40. The hydrogen and oxygen gases impinge on a plurality of barriers in the dehumidifier 42, removing moisture from the hydrogen and oxygen gases. By passing through the dehumidifier 42, the purity of hydrogen and oxygen gas is improved.

Thereafter, the dehumidified hydrogen and oxygen gases pass through a gas mixer 43. The mixing fan 44 in the gas mixer 43 is rotated by the flow of hydrogen and oxygen gas, and swirls, stirs, and uniformly mixes the hydrogen and oxygen gas. The mixed gas is distributed by the mixed gas distributor 41 into a plurality of mixed gas streams. One mixed gas stream is supplied to a burner 48 connected to one branch pipe 47.

When operating the boiler apparatus 100, first, the mixed gas is ejected from the burner 48 to ignite the mixed gas. After ignition, the gap between the burner 48 and the smoke tube 50 is sealed with a shield wall 60. The flame core and the internal flame heat the inner peripheral surface of the first split pipe 61 and indirectly preheat the boiler water. The preheated boiler water convects and diffuses into the water section 59. As a result, the entire boiler water is preheated. Since the heat of the first split pipe 61 is also conducted to the boiler water supply unit 49a, the boiler water in the boiler water supply unit 49a is also preheated.

The boiler water near the water surface is heated by the second divided pipe 62 heated by the relatively high temperature outer flame. The steam is heated until the temperature of the boiler water exceeds the boiling point, generating saturated steam. The saturated steam is further heated and dried by the third dividing pipe 63 to become high-pressure steam. The high-pressure steam is supplied to the steam utilization facility via the steam room 58 and the main steam pipe 68.

According to the mixed gas generator 10 and the boiler of the first embodiment, the following advantages can be obtained.

• Moisture is removed from the hydrogen and oxygen gas by the dehumidifier 42 connected to the main body 11, thereby improving the purity of the hydrogen and oxygen gas. Hydrogen by gas mixer 43 The oxygen gas is uniformly mixed.

• Since the mixing fan 44 is rotated by the flow of hydrogen and oxygen gas, no driving device such as a motor is required. Therefore, the hydrogen and oxygen gases are efficiently mixed with energy saving.

• When the hydrogen and oxygen gas collide with the multiple barriers of the dehumidifier 42, moisture in the hydrogen and oxygen gas is condensed on the surfaces of the multiple barriers, and moisture is removed from the hydrogen and oxygen gas. Therefore, hydrogen and oxygen gases are efficiently dehumidified with energy saving.

The power supply unit 14 includes a polarity converter for inverting the polarity of the electrode rod 21 and the electrolytic cell 13 at predetermined time intervals. Therefore, the electrode rod 21 and the electrolytic cell 13 are prevented from being acidified by oxygen generated at the anode, and the electrode rod 21 and the electrolytic cell 13 can be used for a long time.

-The impurities are discharged from the electrolytic cell 13 by the tapered surface 33 provided at the bottom of the electrolytic cell 13. Therefore, there is no need to discharge the electrolytic solution and disassemble the electrolytic cell 13 in order to remove impurities, so that maintenance work is easy.

• Since a predetermined amount of water is constantly stored in the electrolytic cell 13, the work of checking the amount of water is omitted, and work efficiency is improved.

• The plurality of electrolyzers 13 are connected by first, second and third communication pipes 18, 19, and 20. Therefore, a large amount of gas generated in all the electrolytic cells 13 can be easily collected. In addition, there is no need to check the amount of water and the amount of gas generated for each electrolytic cell 13.

• The mixed gas distributor 41 eliminates the need for complicated work of switching devices that use mixed gas.

-During the combustion of the mixed gas, the shield wall 60 blocks the space between the burner 48 and the combustion chamber 64a, so that only the mixed gas is combusted and the lowering of the combustion temperature due to contamination by impurities is suppressed. You.

-The boiler water is efficiently heated because the flame, internal flame, and external flame are burned so as to be located in the split pipes 61, 62, 63, respectively.

• Since the second dividing pipe 62 has the bellows 66, the inside and outside of the smoke pipe 50 A change in the overall length of the smoke tube 50 due to a temperature difference is suppressed. (Second embodiment)

Hereinafter, a boiler apparatus 100 according to the second embodiment of the present invention will be described. The mixed gas generator 10 of the second embodiment is the same as that of the first embodiment. FIG. 5 shows the boiler body 49 of the boiler apparatus 100. The boiler body 49 has a cylindrical shape having an upper wall 52 and a bottom wall 53. A communication hole 52 a communicating with the main steam pipe 68 is formed in the upper wall 52. A valve (not shown) is provided at the upper end of the main steam pipe 68. By closing the valve, the boiler body 49 and the main steam pipe 68 are sealed. On the lower surface of the upper wall 52, an arc-shaped trap groove 52b is formed so as to surround the communication hole 52a. It is preferable that the boiler body 49 and the main steam pipe 68 are made of copper plated with nickel (Ni).

A spiral water pipe 71 is disposed so as to surround the boiler body 49 and the main steam pipe 68. A discharge pipe 72 connected to the water pipe 71 is disposed below the boiler body 49. One end of the discharge pipe 72 penetrates the peripheral wall of the boiler body 49 and is located inside the boiler body 49. The discharge pipe 72 has a discharge port (not shown) that opens toward the bottom wall 53. Boiler water is supplied to the upper end of the water pipe 71 by a pump (not shown), and is supplied from the discharge port of the discharge pipe 72 to the inside of the boiler body 49 (the upper surface of the bottom wall 53). By operating a valve (not shown) provided between the water pipe 71 and the discharge pipe 72, the supply and stop of the boiler water to the boiler body 49 are adjusted. Pure water or tap water is used as the poiler water.

The plurality of burners 48 are arranged so as to face the lower side surface and the bottom wall 53 of the boiler body 49. The plurality of burners 48 are connected to the branch pipe 47 of the mixed gas generator 10. The burner 48 burns the mixed gas supplied from the branch pipe 47 and heats the lower part of the boiler body 49, particularly the bottom wall 53, by the flame. The heat of combustion of the mixed gas is transmitted to the boiler water in the boiler body 49 via the bottom wall 53. Therefore, the bottom wall 53 functions as a heat transfer partition, that is, an evaporator.

The brown gas flame is at a temperature of 150-200 ° C. Boiler body 4 9 The distance between the burner 48 and the boiler body 49 is adjusted so that the temperature inside the furnace is 800 to 900 ° C. If the temperature inside the boiler body 49 is below 800 ° C, the steam explosion of the boiler water is insufficient and the high-pressure steam contains a relatively large amount of moisture. On the other hand, if the temperature inside the boiler body 49 is higher than 900 ° C., the boiler body 49 tends to deteriorate.

The boiler apparatus 100 includes a boiler body 49, a main steam pipe 68, a water pipe 71, and a burner 48. Since the heat insulating wall 73 covers the boiler body 49, the water pipe 1 and the burner 48, the release of combustion heat is suppressed, and the boiler body 49 is efficiently heated. Next, the operation of the boiler apparatus 100 will be described.

First, the pump is operated with the valve between the water pipe 71 and the discharge pipe 72 closed to supply boiler water from the upper end of the water pipe 71. Next, the mixed gas is supplied to the panner 48, ignited, and the inside of the boiler body 49 is heated to 800 to 900 ° C. The surplus heat of the flame heats the air inside the heat insulating wall 73. As a result, the boiler water in the water pipe 71 is preheated until it reaches about 100 to 200 ° C.

After that, the valve is opened and boiler water is supplied from the discharge pipe 72 into the boiler body 49. Since the inside of the boiler body 49 is heated to 800 to 900 ° C., the boiler water discharged toward the bottom wall 53 explodes with steam, and expands rapidly. As a result, high-pressure steam of 10 to 30 atm is generated. The high-pressure steam is supplied from the boiler body 49 to the steam utilization facility via the main steam pipe 68.

High pressure steam is dry steam. However, if some of the boiler water does not explode in steam, saturated steam containing water is generated. Such moisture is removed by condensation in the trap groove 52b of the upper wall 52 of the boiler body 49. Thus, the boiler apparatus 100 generates dry high-pressure steam.

According to the boiler apparatus 100 of the second embodiment, the following advantages can be obtained.

• Since the boiler device 100 of the second embodiment has a relatively simple structure, it can be easily reduced in size. In addition, since high-heat brown gas is burned, high-pressure steam can be efficiently generated from boiler water.

• Excess heat from the burner 4 8 is used to heat the water pipe 7 1 surrounding the boiler body 49 Is done. Therefore, the boiler water is preheated efficiently.

-Moisture can be removed from the high-pressure steam by the trap groove 52 provided in the upper wall 52 of the boiler body 49.

(Third embodiment)

FIG. 6A shows a boiler apparatus 100 of the third embodiment. The boiler apparatus 100 of the third embodiment is suitable for obtaining low-pressure steam.

A plurality of burner sleeves 48 b are formed on the peripheral wall of the boiler body 49. The parner sleeve 48b is inclined, and its inner end is higher than its outer end. Pana sleep 48 b is preferably inclined by about 45 ° with respect to boiler body 49. A burner 48 is disposed inside each of the parner sleeves 48b.

The spiral water pipe 71 is disposed so as to surround the poirer body 49. When the inside of the boiler body 49 is heated by the panner 48, the excess heat preheats the boiler water inside the water pipe 71. The discharge pipe 72 is connected to the lower end of the water pipe 71. The distal end of the discharge pipe 72 is disposed inside the burner sleeve 48b. Therefore, the boiler water is discharged from the discharge pipe 72 to the vicinity of the burner 48, and is directly heated by the flame of the panner 48. Knob sleeve 48 b and burner 48 function as an evaporator.

A cooling pipe 74 is connected to the bottom wall 53 of the boiler body 49. By supplying a cooling gas such as nitrogen or dry air into the boiler body 49 via the cooling pipe 74, the temperature inside the boiler body 49 is maintained at 200 to 300 ° C. . If the temperature in the boiler body 49 is less than 200 ° C., the efficiency of evaporation of the boiler water decreases. If the temperature in the boiler body 49 is higher than 300 ° C., high-pressure steam having a pressure higher than a desired pressure is generated. The temperature of the flame is reduced by the cooling gas. The boiler water discharged near the burner 48 lowers the temperature around the burner 48. Therefore, the boiler water evaporates without causing a steam explosion and becomes low-pressure saturated steam of 3 to 5 atmospheres at 100 to 300 ° C. As the flame of the burner 48 is blown obliquely upward, an updraft is formed. Internal forces et Boi saturated steam burner sleeve ⁴ 8 b by updrafts And sent to the steam utilization facility via the main steam pipe 68. According to the boiler apparatus 100 of the third embodiment, low-pressure steam of 3 to 5 atm at 100 to 300 ° C. can be easily obtained with a simple configuration. Further, since the burner sleeve 48 b is inclined, the saturated steam is sent to the main steam pipe 68 without flowing back to the burner sleeve 48 b.

FIG. 6B shows a boiler apparatus 100 of the fourth embodiment. The boiler apparatus 10 ° of the fourth embodiment is suitable for obtaining a large amount of steam. Specifically, the discharge pipe 7 2. is connected to the bottom wall 53 of the boiler body 49. Boiler water is discharged upward from discharge pipe 72. A cooling pipe 74 is connected to the bottom wall 53 of the boiler body 49. Cooling gas is supplied from the cooling pipe 74, and the temperature in the boiler body 49 is maintained at 200 to 250 ° C. The boiler water evaporates on the inner wall (evaporator) of the boiler body 49 and becomes steam at about 120 ° C. The steam is supplied from the boiler body 49 to the steam utilization facility via the main steam pipe 68 by an ascending current. Therefore, according to the boiler apparatus 100 of the fourth embodiment, a large amount of steam can be easily obtained with a simple structure. FIG. 7A shows a modification of the electrolytic cell 16 of the mixed gas generator 10.

As shown in FIG. 7A, spacers 75 are fitted to the ends of the plurality of electrode tubes 23. Thereby, the plurality of electrode tubes 23 are arranged concentrically. As shown in FIG. 7C, the spacer 5 is U-shaped, and has a pair of holding pieces 75a and a connecting portion 75b connecting the holding pieces 75a. The spacer 5 is preferably made of an insulating material such as a synthetic resin. As shown in FIG. 7B, the peripheral wall end of the electrode tube 23 is sandwiched between the sandwiching pieces 75a. When a plurality of electrode tubes 23 to which the spacers 75 are attached are arranged concentrically, the distance between the adjacent electrode tubes 23 becomes equal to the holding piece 75a.

Since the spacer 75 facilitates concentric arrangement of the plurality of electrode tubes 23, the electrolytic cell 16 can be assembled easily and quickly.

The first to fourth embodiments may be changed as follows.

-For example, a filter 15 such as an ion exchange membrane, a water purification device 15b such as a distillation device, a filtration device, a pure water generation device, and an ion exchange resin may be connected to the pump 15 of the mixed gas generation device 10. In this case, organic components such as industrial wastewater, rainwater, seawater and wastewater, Water containing inorganic components is supplied to a water purification device. The water purifier removes impurities in the water by filtration, distillation or ion exchange to produce distilled water, pure water or ion-exchanged water. Distilled water, pure water or ion-exchanged water is supplied to the electrolytic cell 13. In order to maintain a predetermined amount of generated brown gas, the purity of the purified water is preferably 90% or more. The water purifier allows industrial wastewater, which is normally discarded, and rainwater, seawater, and sewage, which are treated at water treatment plants, to be reused as electrolyte water.

• When a power generating turbine is connected to the boiler 100 of the first and second embodiments, a part of the generated power is supplied to the mixed gas generator 10 to generate power for electrolysis of water. It may be used for. The steam utilization equipment connected to the boiler apparatus 100 of the third and fourth embodiments is, for example, an industrial drier, a heating device, a public bath, a sauna, and the like.

• The fire tube boiler device 100 of the first embodiment may be changed to, for example, a water tube boiler device. In a water tube type boiler, boiler water is stored in a plurality of pipe-shaped boiler bodies. The boiler is directly heated by the burner. In this case, preheating of the boiler water is omitted, and high-pressure steam is generated in a shorter time.

• The mixed gas distributor 41 may be omitted.

-A spiral passage may be formed in the gas mixer 43 instead of the mixing fan 44. In this case, the hydrogen and the oxygen gas are swirled and flow along the spiral path, so that the hydrogen and the oxygen gas are mixed.

Claims

The scope of the claims

1. A mixed gas generator (10) for generating hydrogen gas and oxygen gas by electrolysis of water,

An electrolytic cell (16) each having an electrode rod (21) and at least one electrode tube (23) arranged around the electrode rod; and a plurality of electrolytic cells containing water and an electrolyte. An electrolytic cell (13),

A mixed gas generator comprising: a mixer (43) connected to the plurality of electrolytic cells via a gas supply pipe (40) to uniformly mix the hydrogen gas and the oxygen gas.

2. The mixer according to claim 1, wherein the mixer includes a mixing fan rotatably supported by the flow of the hydrogen gas and the oxygen gas, and the hydrogen gas and the oxygen gas are mixed by rotation of the mixing fan. Mixed gas generator.

3. The mixed gas generator further includes a dehumidifier (42) for removing moisture from the hydrogen gas and the oxygen gas flowing in the gas supply pipe, and the dehumidifier is configured to flow in a direction in which the hydrogen gas and the oxygen gas flow. The hydrogen gas and the oxygen gas collide with the barrier when the hydrogen gas and the oxygen gas pass through the dehumidifier, and the moisture is condensed on the surface of the barrier. Item 3. The mixed gas generator according to Item 2.

4. The power supply unit further includes a power supply unit (14) for applying a positive or negative voltage to the electrode rod and the electrolytic cell in order to generate hydrogen gas and oxygen gas by electrolyzing the water. The mixed gas generator according to any one of claims 1 to 3, further comprising a polarity converter (14a) for inverting the polarity of a voltage applied to the electrode rod and the electrolytic cell at predetermined time intervals.

5. The mixed gas according to claim 4, wherein the power supply unit has an electrolysis controller (14b) for stopping power transmission to at least one of the plurality of electrolyzers at predetermined time intervals.

6. The electrolytic cell according to claim 1, wherein each of the electrolytic cells has a discharge part (33) formed at the bottom of the electrolytic cell to discharge impurities generated during electrolysis from the electrolytic cell. The mixed gas generator according to any one of the above.

7. a water amount detector (15a) disposed in at least one of the electrolytic cells, for detecting a water amount in the electrolytic cell;

The water supply device (15) for receiving a signal from the water amount detector and replenishing the water to the plurality of electrolytic cells when the amount of water in the electrolytic cell becomes equal to or less than a predetermined amount. 7. The mixed gas generator according to any one of 6.

8. The mixed gas generator according to any one of claims 1 to 7, further comprising a communication pipe (18, 19, 20) for communicating the plurality of electrolytic cells with each other.

9. The mixed gas generation according to any one of claims 1 to 8, further comprising a distributor (41) connected to the gas supply pipe to distribute the mixed gas flow into a plurality of mixed gas flows. apparatus.

10. A water purification device (15b) connected to the main body and purifying at least one selected from industrial wastewater, rainwater, seawater and sewage, wherein the purified water is supplied to the plurality of electrolyzers. 10. The mixed gas generator according to claim 1, wherein the mixed gas generator is supplied.

11. The at least one electrode tube is a plurality of electrode tubes arranged concentrically, and is attached to an end of the plurality of electrode tubes in order to arrange the plurality of electrode tubes at equal intervals. The mixed gas generator according to any one of claims 1 to 10, further comprising a spacer (75).

1 2. A mixed gas generator (10) for generating hydrogen gas and oxygen gas by electrolysis of water,

An electrolytic cell (16) each having an electrode rod (21) and at least one electrode tube (23) arranged around the electrode rod; and a plurality of cells each containing an electrolyte containing water and an electrolyte. An electrolytic cell (13),

A water supply device (15) for supplying the water to the plurality of electrolytic cells,

A power supply unit (14) for applying a positive or negative voltage to the electrode rod and the electrolytic cell to electrolyze the water to generate hydrogen gas and oxygen gas;

13. The mixed gas generator according to claim 12, wherein the plurality of electrolytic cells, the power supply unit, and the water supply device are assembled.

14. A boiler device (100) connected to the mixed gas generator according to any one of claims 1 to 13 and using the mixed gas as fuel,

A boiler body (49) for storing boiler water,

A combustion device (48) attached to the boiler main body and burning the mixed gas; disposed inside the boiler main body so as to be in contact with the boiler water; A heat exchange element that transmits and generates high-pressure steam

(50).

15. The heat exchange element is a smoke pipe (50) which is disposed in the boiler main body above the combustion device, and is formed by connecting a plurality of divided pipes (61, 62, 63). The combustion flame of the mixed gas passes through the interior of the smoke tube, and heats the boiler water through the smoke tube;

The plurality of divided pipes are in contact with a flame core of the combustion flame, an inner flame and an outer flame, respectively. The boiler apparatus according to claim 14, further comprising: a first, a second, and a third split pipe.

16. The boiler device according to claim 15, wherein at least one of the plurality of divided pipes is formed in a bellows shape.

17. The combustion device is provided with a burner (48) arranged at a distance from the boiler body, and around the burner so as to close a space between the burner and the boiler body during combustion of the mixed gas. Boiler apparatus according to claims 14 to 16, including a shield wall (60) arranged in the boiler.

18. A boiler device (100) connected to the mixed gas generator according to any one of claims 1 to 13 and using the mixed gas as fuel,

A tubular boiler body (73) having a bottom,

A combustion device (48) that burns the mixed gas and heats the inside of the boiler body to a predetermined temperature;

An evaporator (53; 48; 48b; 49) heated by the heat of combustion of the mixed gas;

A boiler device comprising: a water pipe (71) for supplying boiler water to the heated evaporator; wherein the boiler water generates steam explosion in the evaporator to generate high-pressure steam.

19. A boiler device using a mixed gas generated by the mixed gas generator according to any one of claims 1 to 13 as fuel,

A tubular boiler body having a bottom,

A cooling pipe (74) for supplying a cooling gas into the boiler body to maintain the inside of the boiler body at a predetermined temperature;

A water pipe (71) for supplying boiler water to the heated evaporating section; Is a boiler device that generates low-pressure steam by evaporating in the evaporator.

20. The method according to claim 18 or claim 19, wherein the water tube is arranged to spirally surround the boiler body so that boiler water in the water tube is preheated by the heat exchange element. The boiler device as described.

21. The boiler apparatus according to claim 18, wherein the boiler main body is heated to 80 ° C or more, which is sufficient for causing the boiler water to cause a steam explosion.

22. The boiler apparatus according to claim 18, wherein the evaporating section is a bottom section of the boiler main body, and the water pipe injects the boiler water toward the bottom section.

23. The boiler apparatus according to claim 19, wherein the inside of the boiler body is heated to 200 to 300 ° C.