JP4201250B2 - Hydrogen generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hydrogen generating apparatus, industrial, domestic, mobile (e.g., an automobile) hydrogen source for a large fuel cell, such as a hydrogen source for small fuel cells, such as mobile phones and wireless devices, for disaster prevention The present invention relates to a hydrogen generation source of a power source (fuel cell), generation of fuel (hydrogen gas fuel), hydrogen gas illumination, and the like.
[0002]
[Prior art]
The hydrogen generator includes a reaction unit that generates hydrogen by hydrolysis of metal hydride (chemical hydride), a pulverization mechanism that supplies metal hydride by pulverization to the reaction unit, and supplies water to the reaction unit. What is comprised including a water supply mechanism is known (for example, refer patent document 1).
[0003]
When hydrolyzing a metal hydride, the product generated by the reaction covers the surface of the metal hydride, and as a result, the reaction stops halfway. The reaction is terminated before the metal hydride is reacted with water (water vapor) to cover the surface of the metal hydride in which the product is finely divided. Thereby, there exists an advantage that hydrogen can be produced | generated efficiently. Moreover, since the reaction area is large, this also has an advantage that hydrogen can be efficiently generated.
[0004]
[Patent Document 1]
JP 2002-137903 A (page 5, FIG. 3)
[0005]
[Problems to be solved by the invention]
By the way, in the above prior art, the structure is such that the metal hydride is simply held in the reaction part in an exposed state, so that as the production of hydrogen proceeds, the product resulting from the reaction is pulverized. It has a problem of covering the surface of the solid metal hydride. Moreover, since it is exposed, there is a problem that care must be taken in handling the metal hydride before being held in the reaction section.
[0006]
The present invention has made in view of the above circumstances, and aims to provide a hydrogen generating apparatus using a better efficiency can generate hydrogen, the handling of easily hydrogenated product To do.
[0007]
[Means for Solving the Problems]
Hydrogen generator of the present invention of claim 1, wherein has been made for solving the above problems is an apparatus for producing hydrogen (hydrogen gas H ₂₎ by hydrolysis reaction using a hydride, rod or wire The hydride body formed in the shape of at least a side surface is covered with a resin coating, and a water supply part for supplying water is provided on the upper wall, and the hydrogen generated by the hydrolysis reaction is A reaction vessel in which a hydrogen take-out portion for taking out is provided on the upper wall, a discharge port for NaOH aqueous solution and pulverized resin is provided in the upper wall, and a hydride insertion / extraction portion for allowing the hydride to be inserted and removed is provided on a side surface; , Fixed to the inside of the side surface of the reaction vessel facing the hydride insertion / extraction portion of the reaction vessel, formed in a file shape having a rough surface, and the end surface of the hydride is pressed against the hydrogen An end face of the product is scraped, and the hydride is pulverized and provided with a powdering unit for diffusing into the reaction vessel, and a mechanism for rotating and stopping the hydride, and the hydride is supplied to the powdering unit. And pulverization control means for pulverizing along the axial direction from the end face of the hydride by pressing toward the hydride, and the hydride powdered by the pulverization control means is supplied from the water supply unit of the reaction vessel. It is characterized in that hydrogen is extracted from the hydrogen extraction portion of the reaction vessel by reacting with the supplied water .
[0008]
Hydrogen generator of the present invention according to claim 2, in the hydrogen generating apparatus according to claim 1, hydride insertion portion of the reaction vessel, a cylindrical guide the hydride for guiding said hydride It is characterized by being formed continuously in the insertion / extraction part .
[0016]
According to the present invention described in claim 1, it is possible to produce hydrogen in good Riyoi efficiency. If pulverization is continued or stopped by the pulverization control means of the hydrogenation generator, the reaction can be easily controlled.
[0018]
According to the second aspect of the present invention, the hydride that can be inserted and removed through the hydride insertion / extraction section is guided by the cylindrical guide in the reaction vessel. This allows better positioning of the hydride end face and the powdered part. In addition, the hydride can be protected.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the hydride and hydrogen generator of the present invention.
[0020]
In FIG. 1, reference numeral 1 indicates a hydrogen generator according to the present invention. The hydrogen generation apparatus 1 is an apparatus for generating hydrogen (hydrogen gas H ₂ ) by hydrolysis using the hydride 2 according to the present invention, and includes the hydride 2, the reaction vessel 3, and the powdering unit. 4 and pulverization control means 5. Hereinafter, each component will be described.
[0021]
The hydride 2 is configured using so-called chemical hydride, and has a hydride body 6 and a resin coating 7. Moreover, the hydride 2 is formed in the shape of a rod or a line. In this embodiment, the hydride 2 is formed in a cylindrical shape (not limited to this shape).
[0022]
For example, NaH is used as the hydride body 6. In addition to NaH, LiH, NaBH ₄ , NaAlH ₄ , LiAlH ₄ , LiBH ₄ , CaH ₂ , AlH ₃ , MgH _{2 and the} like can be mentioned. The resin coating 7 is made of, for example, an olefin resin composition, and is formed so as to cover at least the side surface of the hydride body 6. The thickness of the resin coating 7 is not particularly limited, but has a thickness that does not hinder powdering.
[0023]
The reaction vessel 3 is an alkali-resistant vessel and is appropriately sized. The reaction vessel 3 is formed with a water supply unit 8 for supplying water (including water vapor) and a hydrogen extraction unit 9 for extracting hydrogen generated by the hydrolysis reaction. Further, the reaction vessel 3 is formed with a discharge port 10 for the NaOH aqueous solution and the pulverized resin, and a hydride insertion / extraction section 11 for allowing the hydride 2 to be inserted / removed.
[0024]
The hydride insertion / extraction part 11 has a diameter slightly larger than the diameter of the hydride 2 and is formed through. A cylindrical guide 12 is coupled to the hydride insertion / extraction part 11. The guide 12 is formed inside the reaction vessel 3 so that the hydride 2 can be guided toward the powdering section 4. Further, the guide 12 is formed so that the tip thereof is positioned in the vicinity of the powdered portion 4. The formation of the guide 12 is arbitrary.
[0025]
In addition, the hydride 2 may be configured to be held inside the reaction vessel 3 by appropriate means without forming the hydride insertion / extraction part 11.
[0026]
The powdered portion 4 is formed, for example, in a file shape having a rough surface. Moreover, the powdering part 4 is being fixed in the reaction container 3 by the support member 4a. The end face of the hydride 2 is pressed against the powdered part 4 (the powdered part 4 may be pressed). When the end face of the hydride 2 is shaved by the powdering section 4, the hydride 2 is powdered and diffused into the reaction vessel 3. In the figure, reference numeral 13 indicates powdered hydride.
[0027]
The powdering control means 5 is a mechanism for rotating or stopping the hydride 2 from the end face of the hydride 2 in the axial direction (not shown. Electric, manual, spring, etc.) )have. The powdering control means 5 has a mechanism (not shown) for pressing the hydride 2 toward the powdering unit 4. Since hydride 2 is used, when hydride 2 is rotated, pulverization is started and hydrogen is generated. Further, when the rotation of the hydride 2 is stopped, the pulverization is stopped and the production of hydrogen is stopped. In addition, in order to attain powdering, the structure which the powdering part 4 side rotates may be used. In this embodiment, pulverization by rotation is adopted, but it may be by vibration or the like (if pulverization can be achieved).
[0028]
In the above configuration, after the hydride 2 is inserted into the hydride insertion / extraction section 11 and the end face of the hydride 2 is pressed against the powdering section 4, the end face of the hydride 2 is powdered by rotating the hydride 2 at a predetermined rotational speed. The hydride 13, which has been cut and powdered by the conversion unit 4, diffuses into the reaction vessel 3. The powdered hydride 13 reacts with water (or water vapor) supplied from the water supply unit 8, and as a result, hydrogen is generated (NaH + H ₂ O → NaOH + H ₂ (0.083 g (1 g of NaH)). 1.86 L: 0 ° C., 1 atm) of H ₂ is produced)).
[0029]
The above reaction is a dust explosion, and the reaction occurs very intensely in a chain. The product produced by the reaction is completed soon after the surface of the powdered hydride 13 is coated.
[0030]
The produced hydrogen is recovered through the hydrogen extraction unit 9 and used as fuel. Further, the NaOH produced by the reaction, _{H 2} O, only _{H 2} O is discharged from the _{H 2} O outlet (not shown) are separated. The NaOH remaining in the reaction vessel 3 is recovered from the outlet 10 together with the remaining H ₂ O when stopped.
[0031]
As described above, since the hydride 2 according to the present invention has the resin coating 7, it can improve the atmospheric stability and make it easier to handle than the conventional one. In addition, the product of the hydrolysis reaction can be prevented from directly covering the surface of the hydride body 6. Furthermore, only a necessary part can be pulverized to cause a hydrolysis reaction, and as a result, the reaction can be easily controlled. And since the hydrogen generator 1 which concerns on this invention is an apparatus using the said hydride 2, it can produce | generate hydrogen with better efficiency. In addition, the reaction can be easily controlled.
[0032]
In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.
[0033]
【The invention's effect】
As described above, according to the present invention described in claim 1, an effect that good Riyoi Ki efficiency out to generate hydrogen, it is possible to easily control the reaction.
[0038]
According to the second aspect of the present invention, it is possible to more reliably position the end face of the hydride and the powdered portion by forming a cylindrical guide continuous to the hydride insertion / extraction portion. There is an effect. In addition, the hydride can be protected by the cylindrical guide.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a hydride and hydrogen generator according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hydrogen generator 2 Hydride 3 Reaction container 4 Powdering part 5 Powdering control means 6 Hydride main body 7 Resin coating 8 Water supply part 9 Hydrogen extraction part 10 Outlet 11 Hydride insertion / extraction part 12 Guide 13 Powdered hydrogen monster

Claims (2)

An apparatus for generating hydrogen (hydrogen gas H ₂ ) by a hydrolysis reaction using a hydride ,
A hydride in which at least a side surface of a hydride body formed in a rod or a line is coated with a resin coating ;
A water supply unit for supplying water is provided on the upper wall, a hydrogen extraction unit for extracting hydrogen generated by the hydrolysis reaction is provided on the upper wall, and a discharge port for NaOH aqueous solution and pulverized resin is provided on the upper wall. A hydride insertion / extraction part provided on the side surface for allowing the hydride to be freely inserted and extracted;
The support member is fixed to the inside of the side surface of the reaction vessel facing the hydride insertion / extraction portion, and is formed in a file shape having a rough surface. The end surface of the hydride is pressed against the end surface of the hydride. A pulverized portion in which the hydride is pulverized and diffused into the reaction vessel;
A pulverization control means comprising a mechanism for rotating and stopping the hydride, and pressing the hydride toward the powdering section to powder from the end surface of the hydride along the axial direction;
Consists of
Hydrogen, wherein the hydride powdered by the pulverization control means reacts with water supplied from the water supply part of the reaction vessel to take out hydrogen from the hydrogen take-out part of the reaction vessel Generator . The hydrogen generator according to claim 1,
A hydrogen generating apparatus , wherein a cylindrical guide for guiding the hydride is continuously formed in the hydride insertion / extraction portion of the hydride in the reaction vessel .

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