JP3054565B2 - Hydrogen gas discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogen gas discharging device for discharging hydrogen gas generated inside a device such as an absorption refrigerator.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Patent Publication No. Hei.
Equipped with a hydrogen discharge tube that has one end flared and the other end sealed and transmits hydrogen gas by heating, and a heater that heats the periphery of the hydrogen discharge tube, and absorbs the hydrogen discharge tube using a flared part A hydrogen gas discharge device connected to a service valve of a bleed device of a refrigerating machine is disclosed.

[0003]

In the above prior art,
Only the flare processing section connected to the service valve opens and communicates with the bleeding device, and hydrogen flows into the hydrogen discharging pipe and is discharged to the atmosphere. However, since the end of the hydrogen discharge tube is sealed, the problem that the inflowing hydrogen stops at the end and it is difficult to replenish the inside occurs, and if the replenishment is insufficient, the hydrogen discharge capability of the hydrogen discharge tube is reduced. There was a possibility that it could not be fully exhibited.

[0004] Further, the above-mentioned hydrogen discharge tube requires a process for sealing the tip and welding of the tip, which causes an increase in cost. Further, for example, Tig welding of the tip, for example, of palladium which constitutes the hydrogen discharge tube, is required. There is a possibility that the metal composition may have a thermal effect and a problem may occur in durability. SUMMARY OF THE INVENTION It is an object of the present invention to improve the hydrogen release capability of a hydrogen gas discharge device and to improve cost or durability.

[0005]

In order to solve the above-mentioned problems, the present invention provides a hydrogen discharge tube and a heater for heating the hydrogen discharge tube. A hydrogen gas discharging device that transmits hydrogen to the outside and has a tank storing hydrogen gas, a substantially L-shape having one end connected to a side wall of the tank and the other end connected to an upper portion of the tank from a connection portion of the one end. An object of the present invention is to provide a hydrogen gas discharge device comprising: a hydrogen discharge pipe having a shape of a circle; and a heater for heating the hydrogen discharge pipe upward from a connection side of the hydrogen discharge pipe with a tank side wall.

[0006] Further, the invention according to claim 2 is characterized in that a hydrogen discharge tube,
A hydrogen gas discharge device that includes a heater that heats the hydrogen discharge tube and that permeates hydrogen from the hydrogen discharge tube and discharges the hydrogen to the outside; a tank that stores the hydrogen gas; A substantially L-shaped hydrogen discharge pipe whose end is connected to the upper part of the tank via a connection pipe from the connection part of the one end, and the hydrogen discharge pipe is upwardly connected to a side of the hydrogen discharge pipe connected to the tank side wall; An object of the present invention is to provide a hydrogen gas discharge device including a heater for heating a pipe and a cooling device provided around the connection pipe.

Further, the invention according to a third aspect of the present invention is directed to a hydrogen gas discharging apparatus which includes a hydrogen discharge pipe and a heater for heating the hydrogen discharge pipe, and transmits hydrogen from the hydrogen discharge pipe to the outside to discharge the hydrogen. A tank for storing gas, a first service valve connected to a side wall of the tank, a second service valve connected to a top portion of the tank via a connection pipe, and one end connected to the first service valve And the other end is
Hydrogen discharge pipe comprising a substantially L-shaped hydrogen discharge pipe connected to a service valve of the type described above, and a heater for heating the hydrogen discharge pipe upward from a connection side of the hydrogen discharge pipe with a tank side wall. An apparatus is provided.

[0008]

According to the first aspect of the present invention, one end of the substantially L-shaped hydrogen discharge pipe is connected to the side wall of the tank, and the other end is connected to the upper portion of the tank higher than this one end, and the hydrogen discharge pipe is heated by the heater. The hydrogen discharge tube is heated upward from the connection to the side wall of the tank, so that an ascending flow of non-condensable gas is generated. Accordingly, a flow of non-condensable gas is formed in the hydrogen discharge pipe from the side wall side connection portion of the tank at one end to the other end, and as a result, flows from the tank into the hydrogen discharge pipe from below, flows through the hydrogen discharge pipe, and flows into the tank. A circulating flow of non-condensable gas is formed, and hydrogen gas is constantly replenished into the hydrogen discharge pipe and discharged through the hydrogen discharge pipe, so that the hydrogen gas is discharged by making full use of the performance of the hydrogen discharge pipe. It becomes possible to do.

According to the second aspect of the present invention, the hydrogen discharge pipe is heated upward from its lower part (connection side), so that an ascending flow of the non-condensable gas is reliably generated in the hydrogen discharge pipe. In addition, non-condensable gas such as hydrogen gas flowing through the connecting pipe is cooled by a cooling device provided on the outer peripheral surface of the connecting pipe, and the flow of the non-condensing gas in the connecting pipe to the tank is promoted. The flow further promotes the circulation of the non-condensable gas, makes the flow of the hydrogen gas into the hydrogen discharge pipe smoother, promotes the replenishment of the hydrogen gas, and further improves the discharge capacity.

Further, according to the third aspect of the present invention, when the hydrogen discharge pipe is connected to the tank, the first and second service valves connected to the tank are connected to exchange the hydrogen discharge pipe. Also, using the first and second service valves 3 and 7, closing the first and second service valves, shutting off the flow path between the tank and the hydrogen discharge pipe, and removing the old hydrogen discharge pipe, It is only necessary to connect a new hydrogen discharge pipe, which simplifies the work of connecting and replacing the hydrogen discharge pipe, and allows the work to be completed in a short time.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. Reference numeral 1 shown in the drawing denotes an uncondensable gas tank connected to a non-condensable gas extraction device provided in an absorption refrigerator or the like. This non-condensable gas tank (hereinafter referred to as tank) 1 stores non-condensable gas such as hydrogen gas.

Reference numeral 2 denotes a first connection pipe connected to the side wall 1A of the tank 1 and extends in the lateral direction. Reference numeral 3 denotes a first connection pipe connected to the first connection pipe 2 and includes an on-off valve 3A, a union 4 and a flare nut 5. It is a first service valve that can be opened and closed freely. 6 is a second connection pipe connected substantially perpendicularly to the upper wall 1B above the pipe connection of the first service valve 3 of the tank 1,
Reference numeral 7 denotes a second service valve which is connected to the upper end of the second connection pipe 6 and has an open / close valve 7A, a union 8 and a flare nut 9 and which can be opened and closed freely. Reference numeral 10 denotes a hydrogen discharge tube made of a metal material that can transmit hydrogen gas, for example, palladium or a palladium alloy (for example, containing 25% of silver). This hydrogen discharge tube 10 is formed in an L shape, and flares 11 and 11 are formed at both ends by flaring. The one end flare 11 of the hydrogen discharge pipe 10 is connected to the first service valve 3 by being sandwiched between the union 4 and the flare nut 5, and the hydrogen gas discharge pipe 10 extends upward from the connection portion. The other end flare 11 of the hydrogen discharge tube 10 is connected to the second service valve 7 by being sandwiched between the union 8 and the flare nut 9, and extends laterally from the connection portion.

Reference numeral 12 denotes a heater for heating the hydrogen discharge tube 10. The heater 12 is connected to the flare nut 5 of the first service valve 3, through which the hydrogen gas discharge tube 10 penetrates, and made of a metal heating tube 13 having good heat conduction, and a heater connected to the outer surface of the heating tube 13. It comprises a support tube 14 and an electric heater 15 supported by the heater support tube 14 and housed in the tube. Reference numeral 16 denotes a member for attaching the electric heater 15 to the heater support tube 14, and reference numeral 17 denotes a power cord connected to the electric heater 15.

For example, during operation of the absorption refrigerator, the electric heater 15 is energized and generates heat. Heat is transmitted from the heater support tube 14 to the heating tube 13, and the hydrogen discharge tube 10 is heated from the surroundings by the heating tube 13, and reaches a temperature of, for example, 300 ° C. to 350 ° C. In particular, the temperature at the connection side (the inlet side of the non-condensable gas) with the first service valve 3 surrounded by the heating pipe 13 is the second temperature.
Connection with the service valve 7 (outlet side of non-condensable gas)
Side temperature will be higher. For this reason, the non-condensable gas in the hydrogen discharge pipe 10 heated from the surroundings by the heating pipe 13 flows upward, and as shown by the arrow in FIG. 1, the first connection pipe 2 and the first connection pipe 2 After passing through the service valve 3, it flows into the hydrogen discharge pipe 10 from below, flows through the hydrogen discharge pipe 10 toward the second service valve 7, passes through the second service valve 7 and the second connection pipe 6, and becomes a tank. A flow of non-condensable gas leading to 1 is formed.

The hydrogen gas in the non-condensable gas is
While flowing through the inside, the hydrogen is discharged to the outside through the hydrogen discharge tube 10. Since the flow of the non-condensable gas is formed in the hydrogen discharge pipe 10 as described above, the hydrogen gas flows smoothly and continuously from the tank 1 into the hydrogen discharge pipe 10, and the hydrogen discharge pipe 10 It is released to the outside when passing.
When connecting the hydrogen discharge pipe 10 to the tank 1, the connection is made using the first and second service valves 3 and 7 connected to the tank 1. Also, when replacing the hydrogen discharge pipe 10, the first and second service valves 3 and 7 are used, and the first and second service valves 3 and 7 are used.
The second service valves 3 and 7 are closed, and the flow path between the tank 1 and the hydrogen discharge pipe 10 is shut off. And the flare nut 5,
After removing the old hydrogen release tube 10 by removing 9, the new hydrogen release tube 10 is attached and the flare nuts 5 and 9 are attached to replace the tube.

According to the above embodiment, flares 11 are provided at both ends.
One end of the hydrogen discharge pipe 10 forming the first connection pipe 11 is connected to the first connection pipe 2.
And the side wall 1 of the tank 1 via the first service valve 3
A, and the other end of the upper wall 1 of the tank 1 whose other end is higher than the one end via a second connection pipe 6 and a second service valve 7.
B, and the heater 12 heats the connection side of the hydrogen discharge pipe 10 to the tank 1, so that an ascending flow of non-condensable gas is generated in the heating section of the hydrogen discharge pipe 10 by the heater 12. The first service valve 3 is provided in the hydrogen discharge pipe 10.
From the tank 1 to the second service valve 7, and as a result, flows from the tank 1 through the first connection pipe 2 and the first service valve 3 into the hydrogen discharge pipe 10 from below. , The hydrogen discharge pipe 10 flows toward the second service valve 7, and a circulating flow of the non-condensable gas that reaches the tank 1 through the second service valve 7 and the second connection pipe 6 is formed. The hydrogen gas is replenished into the hydrogen discharge tube and is discharged through the hydrogen discharge tube 10, so that the hydrogen gas can be discharged by making full use of the performance of the hydrogen discharge tube 10. As a result, the hydrogen gas in the hydrogen discharge device can be discharged. The discharge capacity can be greatly improved.

The hydrogen discharge tube 10 has flares 1 at both ends.
It suffices to form the first and the first 11 so that the conventional sealing process at the tip, that is, welding, is not required, so that the cost of the hydrogen discharge tube 10 can be reduced, and further, the deterioration of palladium or the like is suppressed by avoiding the influence of heat. Thus, the durability can be improved, and the maintenance work of the hydrogen gas discharge device can be simplified.

Further, when the hydrogen discharge pipe 10 is connected to the tank 1, the first and second service valves 3 and 7 connected to the tank 1 are used for connection, and when the hydrogen discharge pipe 10 is replaced. In addition, the first and second service valves 3 and 7 can be used for replacement by removing and attaching the flare nuts 5 and 9, so that the connection work can be simplified and the work can be completed in a short time.

Hereinafter, another embodiment of the present invention will be described with reference to FIGS. 2 and 3 have the same reference numerals as those in FIG. 1 and have the same configuration, and a detailed description thereof will be omitted. In FIG. 2, reference numeral 18 denotes a cooling device attached to the outer peripheral surface of the second connection pipe 6. The cooling device 18 includes a plurality of fins 20 connected to the outer peripheral surface of the second connection pipe 6 at predetermined intervals.

During operation of the hydrogen gas discharging device shown in FIG. 2, the electric heater 15 is energized in the same manner as in the above embodiment.
When the hydrogen discharge tube 10 is heated by the heater 12, an upward flow of the non-condensable gas is generated in the hydrogen discharge tube 10 heated by the heater 12, similarly to the hydrogen gas discharge device shown in FIG. I do. Due to this upward flow, the non-condensable gas flows through the hydrogen discharge pipe 10, passes through the second service valve 7, and flows into the second connection pipe 6. Here, the second
A plurality of fins 20 are attached to the outer peripheral surface of the connecting pipe 6, and the second connecting pipe 6 radiates heat not only from the outer peripheral face but also from the plurality of fins 20 and is cooled. For this reason, the downward flow of the non-condensable gas in the second connection pipe 6 is promoted, and the circulation of the non-condensable gas is further promoted by the downward flow and the upward flow, and the hydrogen gas flows to the hydrogen discharge pipe 10. Is more smoothly flown, and the supply of hydrogen gas is promoted, so that the discharge capacity can be further improved.

In FIG. 3, reference numeral 21 denotes a cooling device attached to the outer peripheral surface of the second connection pipe 6. The cooling device 21 is provided so as to cover the second connection pipe 6, and the connection pipe 6 penetrates substantially at the center. The cooling device 21 is provided, for example, in the middle of a cooling water circulation path of the absorption refrigerator, and the cooling water flows. During operation of the hydrogen gas discharge device shown in FIG. 3, the electric heater 15 is energized similarly to the hydrogen gas discharge device shown in FIGS. When the hydrogen discharge tube 10 is heated by the heater 12, an upward flow of the non-condensable gas is generated in the hydrogen discharge tube 10 heated by the heater 12, similarly to the hydrogen gas discharge device shown in FIG. I do. Due to this upward flow, the non-condensable gas is released from the hydrogen discharge
Flows through the second service valve 7 and flows into the second connection pipe 6. Here, the outer periphery of the second connection pipe 6 is covered with the cooling device 21, and the second connection pipe 6 is cooled by the cooling water flowing through the cooling device 21. Therefore, the temperature of the non-condensable gas in the second connection pipe 6 also decreases, and the downward flow of the non-condensable gas is promoted, and the downward flow and the upward flow further promote the circulation of the non-condensable gas. In addition, the flow of the water gas into the hydrogen discharge pipe 10 becomes smoother, the supply of the hydrogen gas is promoted, and the discharge capacity can be further improved.
Further, for example, the cooling water of the cooling device 21 can also be used as the cooling water of the absorption refrigerator, and the hydrogen gas discharging device can be simplified.

It should be noted that the present invention is not limited to the above embodiment, but can be variously implemented without departing from the gist of the present invention. For example, in each of the above embodiments, both ends of the hydrogen discharge pipe 10 are connected to the tank 1 via the first and second service valves 3 and 7, but when there is no need to replace the hydrogen discharge pipe, The hydrogen discharge pipe may be directly connected to the tank, or may be connected to the tank 1 and connected to the connection pipe by a flare nut. In this case, the hydrogen discharge tube 1
In order to avoid the influence of heat such as welding to zero, the durability can be improved by connecting the hydrogen discharge tube using a flare nut.

In each of the above embodiments, the other end of the hydrogen discharge pipe 10 is connected to the upper wall 1B of the tank 1 via the first service valve 7 and the second connection pipe 6, but the other end is connected to the other end. One end of the hydrogen release pipe 10 may be connected to a portion above the connection to the tank 1 to form a circulation path for the non-condensable gas. Further, in addition to the cooling water, for example, cold water flowing out of an evaporator of an absorption refrigerator or a refrigerant liquid flowing through the absorption refrigerator may be used as the cooling fluid of the cooling device 21 in FIG. The lower the temperature of the cooling fluid, the more the circulation of the non-condensable gas can be promoted.

[0024]

According to the present invention, there is provided a hydrogen gas discharging apparatus as described above. According to the first aspect of the present invention, one end is connected to the side wall of the tank for storing hydrogen gas, and the other end is connected to the tank from the connecting portion. And a heater that heats the hydrogen discharge tube upward from the connection side of the hydrogen discharge tube with the tank side wall.
A non-condensable gas flow is formed in the hydrogen discharge pipe from the side wall side connection part of the tank at one end to the other end, flows from the tank into the hydrogen discharge pipe from below, flows through the hydrogen discharge pipe, and reaches the tank. Is formed, and the hydrogen gas is constantly replenished into the hydrogen discharge pipe and is discharged through the hydrogen discharge pipe, so that the hydrogen gas can be discharged by making full use of the performance of the hydrogen discharge pipe.

In addition, it is not necessary to seal or weld the tip of the hydrogen discharge tube, so that the production cost of the hydrogen gas discharge device can be reduced and the durability of the hydrogen discharge tube can be improved and maintenance can be performed. Management work can be simplified. According to the second aspect of the present invention, the heater discharges the hydrogen discharge tube by the heater, generates an ascending flow of the non-condensable gas at the inlet side of the hydrogen discharge tube, and connects to the outlet side of the hydrogen discharge tube. The pipe is cooled by a cooling device, so that the downward flow of the non-condensable gas in the connecting pipe is promoted, and the downward flow and the upward flow further promote the circulation of the non-condensable gas, thereby releasing hydrogen gas from the hydrogen gas. The flow into the pipe becomes smoother, the supply of hydrogen gas is promoted, and the discharge capacity can be further improved.

According to the third aspect of the present invention, when the hydrogen discharge pipe is connected to the tank, the first and the second tubes connected to the tank are connected.
When connecting using the second service valve and replacing the hydrogen discharge pipe, the first and second service valves are also used, the first and second service valves are closed, and the flow path between the tank and the hydrogen discharge pipe is used. And after removing the old hydrogen release tube,
It is only necessary to connect a new hydrogen discharge tube, which simplifies the operation of connecting and replacing the hydrogen discharge tube, and can complete the operation in a short time.

[Brief description of the drawings]

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

FIG. 2 is a longitudinal sectional view of a hydrogen gas discharging device according to a second embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a hydrogen gas discharging device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tank 2 1st connection pipe 3 1st service valve 5 Flare nut 6 2nd connection pipe 7 2nd service valve 9 Flare nut 10 Hydrogen discharge pipe 12 Heating device 18 Cooling device 21 Cooling device

Claims (3)

(57) [Claims] 1. A hydrogen gas discharge device comprising a hydrogen discharge tube and a heater for heating the hydrogen discharge tube, wherein the hydrogen gas discharge device transmits hydrogen from the hydrogen discharge tube and discharges the hydrogen to the outside. A substantially L-shaped one end connected to the side wall of the tank and the other end connected to the upper part of the tank from the connection part of the one end.
A hydrogen gas discharge device comprising: a hydrogen discharge tube having a shape of a circle; and a heater for heating the hydrogen discharge tube upward from a connection portion of the hydrogen discharge tube with a side wall of the tank. 2. A hydrogen gas discharge device comprising a hydrogen discharge tube and a heater for heating the hydrogen discharge tube, wherein the hydrogen gas discharge device transmits hydrogen from the hydrogen discharge tube and discharges the hydrogen to the outside. A substantially L-shaped hydrogen discharge pipe having one end connected to a side wall of the tank and the other end connected to the upper part of the tank via a connection pipe from a connection portion of the one end, and a connection between the hydrogen discharge pipe and the tank side wall; This hydrogen release from the head part upward
A hydrogen gas discharge device comprising: a heater for heating a pipe; and a cooling device provided around the connection pipe. 3. A hydrogen gas discharge device comprising a hydrogen discharge tube and a heater for heating the hydrogen discharge tube, wherein the hydrogen gas discharge device transmits hydrogen from the hydrogen discharge tube and discharges the hydrogen to the outside. A first service valve connected to the side wall of the tank, a second service valve connected to the upper part of the tank via a connection pipe, and one end connected to the first service valve and the other end connected to the second service valve. Connected to service valve
A hydrogen gas discharge device comprising: a substantially L-shaped hydrogen discharge tube; and a heater that heats the hydrogen discharge tube upward from a connection side of the hydrogen discharge tube with a tank side wall.