JPH10232072A - Hydrogen gas discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the wasting of heat generated from a common heater, and heat efficiently by a method wherein a plurality of hydrogen discharging pipes are arranged symmetrically to the central common heater under neighbored condition. SOLUTION: A tubular heater protecting pipe 67 is arranged at the center of a plurality of hydrogen discharging pipes 65 so as to be neighbored closely to the same pipes 65. Further, a bar type common heater 69 is received in the heater protecting pipe 67. Non-condensed gas, separated from absorbing liquid in the separating tank of an air extracting device, is sent from an air extracting tank into a non-condensed gas tank 51 by a communicating pipe through a communication stopper and is stored in the tank 51. Then, is sent to the hydrogen discharging pipes 59 through hydrogen intake pipes 57. Heat, generated from the common heater 69, is transmitted to the heater protecting pipe 67 and heats the hydrogen discharging pipes 59 as well as the non- condensed gas in the pipe 59 through the closely contacted hydrogen discharging pipes 65. By the heating, hydrogen, contained in the non-condensed gas, permeates through the hydrogen discharging pipes 59. The permeating hydrogen gas is discharged to the outside through vent holes 73, 75, 79.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a hydrogen gas discharging device for discharging hydrogen gas generated in piping of an absorption refrigerator to the outside.

[0002]

[Prior art]

2. Description of the Related Art For example, Japanese Unexamined Patent Publication No. Hei.
A hydrogen gas discharge device is described in which hydrogen gas generated in a pipe of an absorption refrigerator is permeated and discharged from the inside of a hydrogen discharge pipe heated by a heater to the outside.

[0003] As shown in FIG. 9, this hydrogen gas discharge device includes an uncondensable gas tank 101 for storing generated hydrogen gas.
Hydrogen discharge pipe 1 to the service valve 103 attached to the
A pipe type heater 107 for promoting the permeation of hydrogen gas is disposed around the hydrogen discharge tube 105.

In another conventional example not shown,
There is also a configuration in which one bar-shaped heater is arranged adjacent to and parallel to one hydrogen discharge tube.

[0005]

However, in the above-mentioned conventional technique, in the pipe type heater 107, only the heat generated from the inner peripheral surface of the heater 107 heats the hydrogen discharge tube, and the heat generated from the outer peripheral surface is not. Was wasted. For this reason, it has been difficult to efficiently perform heating for promoting the permeation of hydrogen gas.

In a rod-shaped heater (not shown), only the heat generated from one side of the heater heats the hydrogen discharge tube, and the heat generated from the other three sides is wasted. For this reason, similarly, it is difficult to efficiently perform heating.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a hydrogen gas discharge device in which heating for promoting the permeation of hydrogen gas is efficiently performed.

[0008]

Means for Solving the Problems To achieve the above object, a first aspect of the present invention is a hydrogen gas discharging apparatus for transmitting hydrogen gas from the inside of a hydrogen discharge tube heated by a heater and discharging the gas to the outside. A hydrogen gas discharge device comprising: a shared heater arranged at the center; and a plurality of hydrogen discharge tubes symmetrically arranged adjacent to the shared heater.

A second aspect of the present invention is a heater protection pipe which is disposed at the center and stores a shared heater, a hydrogen discharge pipe protection pipe which is disposed on the circumference and is adjacent to the heater protection pipe and stores the hydrogen discharge pipe. 2. The hydrogen gas discharge device according to claim 1, further comprising: each of the protective tubes is formed of a material having good thermal conductivity.

According to a third aspect of the present invention, there is provided the hydrogen gas discharging apparatus according to the second aspect, wherein a vent hole for discharging the permeated hydrogen gas to the outside is provided through the protective tube for the hydrogen discharging tube. Device.

According to a fourth aspect of the present invention, a heat insulating material is provided to cover the outer circumference of the heater protection tube and the hydrogen discharge tube protection tube, and the vent hole for discharging the permeated hydrogen gas to the outside is provided by the hydrogen discharge tube protection tube and the heat insulation tube. 4. The hydrogen gas discharging device according to claim 3, wherein the hydrogen gas discharging device is provided so as to penetrate the material.

According to a fifth aspect of the present invention, the arrangement of the hydrogen discharge tube is as follows:
2. The method according to claim 1, wherein the flared portion at the end of the hydrogen discharge pipe is superimposed on a truncated cone formed at the end of the hydrogen intake pipe, and the flared nut is pressed from the periphery and connected. 5. The hydrogen gas discharge device according to 2, 3, or 4.

According to a sixth aspect of the present invention, the hydrogen discharge tube protection tube is arranged such that the hydrogen discharge tube protection tube is fitted over the flare nut and is covered therewith, and a screw hole is provided through the side surface of the hydrogen discharge tube protection tube. 6. The hydrogen gas discharge device according to claim 5, wherein the screw is screwed into the groove, and the tip of the screw is inserted into an annular groove formed around the upper end of the flare nut to be mounted.

According to a seventh aspect of the present invention, an air-extraction device provided in an absorption refrigerator is connected to a non-condensable gas tank via a communication pipe provided with a communication valve, and a plurality of hydrogen gas discharges are provided to the non-condensable gas tank. The hydrogen gas discharge device according to claim 1, 2, 3, 4, 5, or 6, wherein the device is attached.

According to an eighth aspect of the present invention, there is provided a hydrogen heater according to the first, second, third, fourth, fifth, sixth or seventh aspect of the present invention, wherein a common heater and a protection plate for protecting the plurality of hydrogen discharge tubes are provided. It is a gas discharge device.

According to a ninth aspect of the present invention, there is provided a hydrogen heater according to any one of the first, second, third, fourth, fifth and seventh aspects, wherein a protective box for protecting the whole of the common heater and the plurality of hydrogen discharge tubes is provided. It is a gas discharge device.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG.
3 to FIG. First, referring to FIG. 3, an overall outline of an absorption refrigerator including the hydrogen gas discharge device according to this embodiment will be described.

In FIG. 1, reference numeral 1 denotes an evaporator / absorber body (lower body) in which an evaporator 2 and an absorber 3 are housed. Reference numeral 4 denotes a high-temperature regenerator, which includes a burner 5. Rare absorbent piping 6 from absorber 3 to high temperature regenerator 4
The absorption liquid pump P1, the low-temperature heat exchanger 7, and the high-temperature heat exchanger 8 are provided in the middle of the process.

Reference numeral 10 denotes a high temperature body (upper body), in which a low temperature regenerator 11 and a condenser 12 are housed. Reference numeral 13 denotes a refrigerant vapor pipe from the high-temperature regenerator 4 to the low-temperature regenerator 11, 16 denotes a refrigerant liquid flow-down pipe from the condenser 12 to the evaporator 2, 17 denotes a refrigerant circulation pipe connected to the evaporator 2, and P2. Is a refrigerant pump. Reference numeral 21 denotes a cold water pipe connected to the evaporator 2.

Reference numeral 22 denotes an intermediate absorption liquid pipe extending from the high-temperature regenerator 4 to the high-temperature heat exchanger 8, and reference numeral 23 denotes an intermediate absorption liquid from the high-temperature heat exchanger 8 to the low-temperature regenerator 11. 25 is a low-temperature regenerator 11
A coagulation liquid tube from the low temperature heat exchanger 7 to the low temperature heat exchanger 7 is a coagulation liquid tube from the low temperature heat exchanger 7 to the absorber 3. Also, 29
Is a cooling water pipe.

During operation of the absorption refrigerator constructed as described above, the burner 5 of the high-temperature regenerator 4 burns and, for example, an aqueous solution of lithium bromide (LiBr) (including a surfactant) flowing from the absorber 3 ) Is heated and boiled, and refrigerant vapor (H ₂ O) is separated from the rare absorbing solution. Thereby, the rare absorbing solution is concentrated to become an intermediate absorbing solution.

The refrigerant vapor flows through the refrigerant vapor pipe 13 to the low-temperature regenerator 11. Then, the refrigerant vapor flows inside the heater 14 in the low-temperature regenerator 11 and heats the intermediate absorbing liquid from the high-temperature regenerator 4, thereby lowering the temperature, condensing, and flowing into the condenser 12 as a refrigerant liquid. .

From the heated intermediate absorbing liquid, refrigerant vapor is generated and flows to the condenser 12. In the condenser 12, the low-temperature regenerator 11
The refrigerant vapor flowing from the low-temperature regenerator 11 is cooled and condensed, and flows down to the evaporator 2 through the medium-liquid downflow pipe 16 together with the refrigerant liquid flowing from the low-temperature regenerator 11.

In the evaporator 2, the refrigerant liquid is circulated and dispersed through the refrigerant circulation pipe 17 by the operation of the refrigerant pump P2. Then, cold water cooled by the spray and having a lowered temperature is supplied to the load. The refrigerant vapor vaporized in the evaporator 2 flows to the absorber 3 and is absorbed by the sprayed absorbing liquid.

On the other hand, the intermediate absorption liquid whose concentration has increased due to separation of the refrigerant vapor in the high-temperature regenerator 4 flows to the low-temperature regenerator 11 through the intermediate absorption liquid pipe 22, the high-temperature heat exchanger 8, and the intermediate absorption liquid pipe 23. . The intermediate absorbent is heated by the heater 14 in which the refrigerant vapor from the high-temperature regenerator 4 flows. And
The refrigerant vapor is separated from the intermediate absorbing liquid, and the concentration of the absorbing liquid further rises to become a concentrated absorbing liquid.

The concentrated absorbent heated and condensed in the low-temperature regenerator 11 flows into the coagulation liquid pipe 25, flows through the low-temperature heat exchanger 7 and the coagulation liquid pipe 26 to the absorber 3, and is dispersed and cooled.
Drop on top of 9. Then, the refrigerant vapor absorbed through the evaporator 2 is absorbed to increase the refrigerant concentration. The rare absorbing liquid having the increased refrigerant concentration is sent out by the driving force of the absorbing liquid pump P1, and the low-temperature heat exchanger 7 and the high-temperature heat exchanger 8
And flows into the high-temperature regenerator 4.

In this manner, the chilled water whose temperature has been lowered through the chilled water pipe 21 connected to the evaporator 2 is supplied to the chilled water load. Further, the concentrated absorption liquid sprayed by the absorber 3 is cooled through the cooling water pipe 29, and the refrigerant vapor is cooled by the condenser 12, so that the hot water whose temperature has increased is supplied to the hot water load.

A part of the absorbing liquid sent out by the driving force of the absorbing liquid pump P1 passes through the absorbing liquid feed pipe 31,
It flows to the ejector 35 of the extraction device 33. The non-condensable gas remaining in the condenser 12 and the absorber 3 is drawn by the ejector 35 through the gas introduction pipes 37 and 39, and separated in the separation tank 41 of the bleed device 33 from the absorbent. And accumulates in the bleeding tank 43. The absorbent in the bleed tank 43 is returned to the absorber 3 via the absorbent return pipe 45.

As shown in FIG. 2 and FIG.
The upper part of the bleeding tank 43 is communicated with the non-condensable gas tank 51 via a communication pipe 49. The communication pipe 49 is provided with a communication stop valve 47. This non-condensable gas tank 51
The hydrogen gas discharge device 53 according to this embodiment is attached to the second embodiment.

As shown in FIG. 1, the hydrogen gas discharging device 53 is connected to a plurality of hydrogen intake ports 55 opened on the upper surface of the non-condensable gas tank 51, respectively.
7 is connected and erected. The upper end of each hydrogen intake pipe 57 is connected to a palladium cell which is a hydrogen discharge pipe 59 for transmitting hydrogen gas.

The hydrogen discharge tube 59 is made of palladium or a palladium alloy (containing 23% of silver).

The connection of the hydrogen discharge pipe 59 is performed by flaring the lower end of the hydrogen discharge pipe 59 in accordance with the truncated cone shape 61 at the upper end of the hydrogen intake pipe 57.
This is performed by overlapping the portion 1 with a portion (not shown) for flare processing, and pressing the portion from around with a flare nut 63. The upper end of the hydrogen discharge pipe 59 is closed.

At the upper end of the flare nut 63, a tubular hydrogen discharge tube protection tube 65 is attached, and is disposed concentrically with the hydrogen discharge tube 59 housed. This attachment forms an annular groove 64 around the upper end of the flare nut 63, fits and covers the upper end of the flare nut 63 with the hydrogen discharge tube protection tube 65, and penetrates the side surface of the hydrogen discharge tube protection tube 65. A screw 66 is screwed into the screw hole provided, and the tip of the screw 66 is
4 FIG. 1 shows only a part of the screws 66 to be attached.

At the center of the plurality of hydrogen discharge tube protection tubes 65 arranged in this way, a cylindrical heater protection tube 67 is disposed closely adjacent to the tube. A rod-shaped common heater 69 is housed inside the heater protection tube 67. Each hydrogen discharge tube protection tube 65 is symmetrically located around the heater protection tube 67 and is arranged on the circumference.

The protection tubes 65 and 67 are formed of a material having good thermal conductivity, for example, a copper alloy.

A heat insulating material 71 is provided so as to completely cover the outer circumferences of the heater protection pipe 67 and the hydrogen discharge pipe protection pipe 65. Vent hole 7 for passing permeated hydrogen gas outside through protective tube 65 and heat insulating material 71.
3, 75 are provided.

The outer periphery of the heat insulating material 71 is covered by a protective box 78 fixed to the upper surface of the non-condensable gas tank 51 with a screw 77 via a predetermined gap 76. At the top of this protective box 78,
A vent hole 79 for releasing hydrogen gas having a low specific gravity is provided. In addition, air for replacing hydrogen gas is introduced into the lower part of the protection box 78, and the lead wire 8 of the common heater 69 is removed.
A hole 83 is provided for passing the hole 1.

With the above configuration, the non-condensable gas separated from the absorbing liquid in the separation tank 41 of the bleed device 33 is sent from the bleed tank 43 through the communication pipe 49 via the communication stop valve 47 to the non-condensable gas tank 51. Accumulate. Furthermore, it reaches the hydrogen discharge pipe 59 through the hydrogen intake pipe 57.

The heat generated from the shared heater 69 is
Heat is transmitted to the heater protection pipe 67 and heats the hydrogen discharge pipe 59 and the internal non-condensable gas through the hydrogen discharge pipe protection pipe 65 which is in close contact therewith. By this heating, the hydrogen contained in the non-condensable gas passes through the hydrogen discharge pipe 59. The permeated hydrogen gas is discharged to the outside through the vent holes 73, 75, 79.

As described above, in this embodiment,
Since the heat generated from the central shared heater 69 is transmitted to the plurality of hydrogen discharge tubes 59 arranged around, the heat is wasted as compared with the conventional case where only one hydrogen discharge tube is disposed. Therefore, heating by the shared heater 69 is efficiently performed.

Further, the heat generated by the common heater 69 is covered by the heat insulating material 71 and the heater protection pipe 67.
Is formed of a material having good thermal conductivity, the heat is efficiently transmitted to the heater protection tube 67. Then, the heat of the heater protection tube 67 is efficiently transmitted to the closely attached hydrogen discharge tube protection tube 65 for the same reason.

Then, the ventilation hole 73 is connected to the hydrogen discharge tube protection tube 6.
5, it is not necessary to provide a large gap between the hydrogen discharge pipe 59 and the hydrogen discharge pipe protection pipe 65 as in the related art, and the hydrogen discharge pipe 59 and the hydrogen discharge pipe protection pipe 65 are separated. Can be placed closer. Therefore, heat is also efficiently transmitted from the hydrogen discharge tube protection tube 65 to the hydrogen discharge tube 59.

(Other Embodiments) In the above embodiment, one hydrogen gas discharging device 5
Although only three are provided, in another embodiment, a plurality of hydrogen gas discharge devices 53 may be provided on the non-condensable gas tank 51 as shown in FIG.

In the above embodiment, the shared heater 6
9, a plurality of hydrogen discharge pipes 59 and a heat insulating material 7 covering them
1 is protected by the protective box 78, but in another embodiment, as shown in FIG.
7 may be used. The protection plate 87 is attached to the non-condensing gas tank 51 by welding or the like, and has an L-shaped cross section that covers the heat insulating material 71.

In another embodiment, as shown in FIG. 6, a cooling tank 89 for cooling the non-condensable gas tank 51 may be provided. This cooling is performed by the non-condensing gas tank 5.
1 is for suppressing the pressure inside, and is performed by introducing the refrigerant of the evaporator 2. That is, the refrigerant liquid flowing down the refrigerant liquid downflow pipe 16 from the condenser 12 to the evaporator 2 and the evaporator 2
The refrigerant liquid circulating in the refrigerant circulation pipe 17 by the refrigerant pump P2 is guided to the cooling tank 89 by the refrigerant bypass pipes 91 and 93, respectively. The introduced refrigerant liquid is supplied to the cooling tank 89.
The refrigerant evaporates in the interior, lowers the ambient temperature, becomes refrigerant gas, and is returned to the evaporator 2 by the refrigerant return pipe 95.

In the above embodiment, the hydrogen gas discharge device 53 is provided on the upper surface of the non-condensable gas tank 51, and the hydrogen discharge pipe 59 is set up vertically. As shown in FIG. 7, the hydrogen discharge pipe 59 may be provided at the upper part of the side surface of the non-condensable gas tank 51, and may be provided horizontally.

Further, in the above embodiment, the protection plate 87 has an L-shaped cross section as shown in FIG. 5, but in other embodiments, as shown in FIG. 6 and FIG. May have a linear cross section.

Further, in the above embodiment, as shown in FIG. 1, two hydrogen discharge tube protection tubes 65 are drawn symmetrically around the heater protection tube 67, but in other embodiments, they are drawn. As shown in FIG. 8, four hydrogen discharge tube protection tubes 65 may be arranged on the circumference around the heater protection tube 67. Further, although not shown, the number of the hydrogen discharge tube protection tubes 65 can be three or five or more.

[0049]

As described above, claims 1 and 2,
According to the invention of 3, 4, 5, 6, 7, 8, or 9, a plurality of hydrogen discharge tubes are symmetrically disposed adjacent to the central shared heater, so that only one hydrogen discharge tube is disposed. In this case, the heat generated by the shared heater is less likely to be wasted, and the heating is performed efficiently.

According to the second aspect of the present invention, the heat generated by the shared heater passes through the heater protection tube and the hydrogen discharge tube protection tube made of a material having good heat conductivity, and is efficiently transferred to the hydrogen discharge tube. Is transmitted. Further, since the hydrogen discharge tube is arranged on the circumference, the heat radially generated from the shared heater is less likely to be wasted.

According to the third aspect of the present invention, the vent hole for discharging the hydrogen gas to the outside is provided through the protection tube of the hydrogen discharge tube, so that a large gap for discharging the hydrogen gas to the outside is provided. Need not be provided between the hydrogen discharge tube and the hydrogen discharge tube protection tube. Therefore, the hydrogen discharge tube and the hydrogen discharge tube protection tube can be arranged closer to each other, and the heat transfer efficiency is further improved.

According to the fourth aspect of the present invention, by providing a heat insulating material for covering the outer circumferences of the heater protection tube and the hydrogen discharge tube protection tube, heat is hardly released, and heating is performed more efficiently.

According to the fifth aspect of the present invention, further, the hydrogen discharge tube is formed by connecting the flared portion by pressing the flared nut from the periphery with a flare nut.
Durability can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a hydrogen gas discharge device according to an embodiment of the present invention.

FIG. 2 is a circuit diagram around a non-condensable gas tank to which the hydrogen gas discharging device of FIG. 1 is attached.

FIG. 3 is a circuit diagram of the entire absorption refrigerator in which the hydrogen gas discharge device of FIG. 1 and the non-condensable gas tank of FIG. 2 are provided.

FIG. 4 is a schematic view showing a hydrogen gas discharge device and a non-condensable gas tank according to another embodiment.

FIG. 5 is a schematic diagram showing a hydrogen gas discharge device and a non-condensable gas tank according to another embodiment.

FIG. 6 is a circuit diagram of the entire absorption refrigerator in which a hydrogen gas discharge device and a non-condensable gas tank according to another embodiment are provided.

FIG. 7 is a schematic diagram showing a hydrogen gas discharge device and a non-condensable gas tank of the embodiment of FIG.

8A is a horizontal cross-sectional view showing an arrangement relationship between a hydrogen discharge pipe protection pipe and a heater protection pipe 67 in a hydrogen gas discharge device, and FIG. 8B is a side view of FIG.

FIG. 9 is a longitudinal sectional view of a conventional hydrogen gas discharging device.

[Explanation of symbols]

 33 Bleed device 47 Communication valve 49 Communication tube 51 Non-condensing gas tank 53 Hydrogen gas discharge device 57 Hydrogen intake pipe 59 Hydrogen discharge tube 61 Truncated cone 63 Flare nut 64 Annular groove 65 Hydrogen discharge tube protection tube 66 Screw 67 Heater protection tube 69 Shared heater 71 Insulation material 73, 75 pores 78 Protection box 87 Protection plate

Claims (9)

[Claims] 1. A hydrogen gas discharge device that transmits hydrogen gas from the inside of a hydrogen discharge tube heated by a heater and discharges the hydrogen gas to the outside, wherein a shared heater disposed in the center and a symmetrically disposed adjacent to the shared heater are disposed. A hydrogen gas discharge device comprising: a plurality of hydrogen discharge tubes. 2. A heater protection tube which is disposed at a center and stores a shared heater, and a hydrogen discharge tube protection tube which is disposed on a circumference adjacent to the heater protection tube and stores a hydrogen discharge tube,
2. The hydrogen gas discharge device according to claim 1, wherein each of the protection tubes is formed of a material having good thermal conductivity. 3. The hydrogen gas discharging device according to claim 2, wherein a vent hole for discharging the permeated hydrogen gas to the outside is provided through the protection tube of the hydrogen discharging tube. 4. A heat insulating material covering the outer periphery of the heater protection tube and the hydrogen discharge tube protection tube, and a ventilation hole for discharging permeated hydrogen gas to the outside penetrates the hydrogen discharge tube protection tube and the heat insulation material. The hydrogen gas discharging device according to claim 3, wherein the hydrogen gas discharging device is provided. 5. The arrangement of the hydrogen discharge tube is such that a flared portion at the end of the hydrogen discharge tube is superimposed on a truncated conical portion formed at the end of the hydrogen intake pipe, and connected by pressing with a flare nut from the periphery. The method according to claim 1, wherein
5. The hydrogen gas discharge device according to 2, 3, or 4. 6. The arrangement of the hydrogen discharge tube protection tube is such that the hydrogen discharge tube protection tube is fitted over the flare nut and covered, and a screw is screwed into a screw hole provided through the side surface of the hydrogen discharge tube protection tube. 6. The hydrogen gas discharging device according to claim 5, wherein the screw is mounted by inserting a tip of the screw into an annular groove formed around an upper end of the flare nut. 7. A bleeding device provided in the absorption refrigerator is connected to a non-condensable gas tank via a communication pipe provided with a communication stop valve, and a plurality of hydrogen gas discharging devices are attached to the non-condensable gas tank. Claim 1, characterized in that
7. The hydrogen gas discharge device according to 2, 3, 4, 5, or 6. 8. The apparatus according to claim 1, further comprising a protection plate for protecting the common heater and the plurality of hydrogen discharge tubes.
The hydrogen gas discharge device according to 4, 5, 6, or 7. 9. A protection box for protecting the whole of the common heater and the plurality of hydrogen discharge tubes is provided.
The hydrogen gas discharge device according to 3, 4, 5, or 7.