JPH025844Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a liquid metal vapor collection device having a casing connected to an inlet pipe on one side and an outlet pipe on the other side.

(Prior art) Since liquid metal such as liquid sodium is chemically active, the free liquid surface of the liquid metal is covered with an inert gas such as argon gas and brought into contact with air or moisture. It is necessary to prevent this from happening. The inert gas is used to keep the pressure constant.
The space above the free liquid level is filled with liquid metal vapor, and as mentioned above, the inert gas is When discharging, even the vapor of the liquid metal is discharged to the outside of the liquid metal handling equipment. In order to prevent the liquid metal vapor from being released outside the system at this time, a liquid metal vapor collection device is used.

A conventional example of the liquid metal vapor collection device is explained with reference to FIG. 2. 1 is a liquid metal container having a free liquid surface of liquid metal 2 inside, and 3 is an inert gas pipe opening into the liquid metal container 1. , 4 is a liquid metal vapor collection device installed in the middle of the inert gas pipe 3, 5 is a liquid metal vapor collection container of the liquid metal vapor collection device 4, and 6 is inside the liquid metal vapor collection container 5. The collection element 6 is provided with a third collection element 6.
A wire mesh as shown in the figure and a polymerized baffle plate as shown in FIG. 4 are used.

(Problems to be Solved by the Invention) In the liquid metal vapor collecting apparatus shown in FIGS. 2, 3, and 4, when a certain amount of liquid metal vapor is collected, the collecting element 6 becomes clogged and the gas Since the passage is blocked, the collection element 6 may be replaced periodically, or the collected liquid metal may be heated and remelted, and then flushed with inert gas through the inert gas piping 3 into the liquid metal container 1. Restoration work is underway. However, replacing the collection element 6 is dangerous and difficult because chemically active liquid metal is attached to the collection element 6. In addition, after temporarily suspending the operation of liquid metal handling equipment,
The collection element 6 must be replaced, which reduces the operating rate of the liquid metal handling equipment. The regeneration work of the collection element 6, which heats and remelts the collected liquid metal and forces the dissolved liquid metal to flow into the liquid metal container 1 via the inert gas piping 3 using an inert gas, is the same as above. Another problem was that it was necessary to temporarily stop the operation of the liquid metal handling equipment, resulting in a decrease in the operating rate of the liquid metal handling equipment.

(Means for Solving the Problems) The present invention addresses the above-mentioned problems in a liquid metal vapor collection device having a casing connected to an inlet pipe at the bottom and an outlet pipe at the top. A plurality of thin grid-like collection members are arranged at intervals in the vertical direction within the casing, and the inclined lower ends of the grid-like collection members are supported by a partition plate having slits. A liquid metal vapor collection device, characterized in that a liquid metal recovery chamber having a liquid metal return pipe is formed, and a heating device is provided around the casing to maintain the liquid metal within the casing at a melting temperature. The objective is to provide an improved liquid metal vapor collection system that can regenerate the grid-like collection member without the need to temporarily stop the operation of the liquid metal handling equipment and that does not reduce the operating rate of the liquid metal handling equipment. The point is to provide equipment.

The present invention provides a liquid metal vapor collection device having a casing connected to an inlet pipe at the bottom and an outlet pipe at the top, as described above, in which a plurality of thin grid-like collection members are vertically arranged inside the casing. The lower ends of the lattice-like collection members are arranged at intervals and supported by a partition plate having slits, a liquid metal recovery chamber having a liquid metal return pipe is formed below the partition plate, and the casing A heating device is installed around the casing to maintain the inside of the casing within the melting temperature of the liquid metal, and an inert gas is supplied from the inlet pipe on one side into the casing, which is maintained at a temperature above the melting point of the liquid metal. The vapor of the liquid metal flowing in at the same time collides with the thin grid-like collection member, is collected as droplets by the thin grid-like collection member, passes through the grid-like collection member, and is discharged from the outlet pipe. The inert gas contains less than the permissible amount of liquid metal vapor. In addition, the liquid metal collected in the form of droplets on each of the grid-shaped collection members is arranged vertically at intervals, so that the liquid metal is collected in the form of droplets while growing. It flows downward over the collection member, flows into the liquid metal collection chamber through the slit in the partition plate, and is returned to the liquid metal container through the return pipe, so that the grid-like structure can be formed without the need to temporarily stop the operation of the liquid metal handling equipment. The collection member is recycled,
The operating rate of liquid metal handling equipment does not decrease.

(Example) Next, the liquid metal vapor collection device of the present invention will be explained with reference to an example shown in FIG. A metal vapor inlet pipe 8 is a liquid metal vapor outlet pipe, and the inlet pipe 7 is provided on one side of the casing 5, and the outlet pipe 8 is provided on the other side of the casing 5, respectively. Also 6a-6e
are a plurality of lattice-shaped collection members (wire mesh-like members) arranged vertically in the casing 5, and the upper ends of each of the lattice-shaped collection members 6a to 6e are supported by the casing 5, Each grid-like collection member 6
The lower ends of a to 6e are supported by a partition plate 9 having a slit provided in the casing 5,
A liquid metal recovery chamber 14 is provided within the casing 5 directly below the porous partition plate 9. Further, 10 is a liquid metal return pipe extending from the liquid metal recovery chamber 14, and 11
1 is a heating device (electric heater), 12 is a heat insulating material covering the outer peripheral surface of the casing 5, and 13 is a liquid metal vapor chamber formed inside the casing 5. Note that the grid-like collecting members 6a to 6e have finer meshes closer to the outlet pipe 8.

(Function) Next, the function of the liquid metal vapor collecting device will be explained. The liquid metal vapor flows from the inlet pipe 7 into the liquid metal vapor chamber 13 together with the inert gas. At this time, the temperature of the liquid metal vapor chamber 13 is maintained at a temperature higher than the melting point of the liquid metal, and the liquid metal vapor that collides with the grid-like collection member 6a is captured by the grid-like collection member 6a as droplets. collected. The remaining liquid metal vapor that has passed through the grid-like collecting member 6a collides with the next grid-like collecting member 6b, and is similarly collected as droplets by the grid-like collecting member 6b. The same goes for the subsequent cases, and the inert gas that is collected one after another by the grid-like collection members 6c to 6e, passes through the last grid-like collection member 6e, and is discharged from the outlet pipe 8 contains liquid metal vapor. Contains less than the allowable value. Further, the liquid metal collected as droplets on each of the grid-like collection members 6a to 6e is
Since the droplets are oriented in the vertical direction, the droplets grow and flow downward on the grid-like collection members 6a to 6e, flow into the liquid metal recovery chamber 14 through the slits in the partition plate 9, and further It is returned to the liquid metal container through return pipe 10.

(Effect of the invention) The present invention provides a liquid metal vapor collection device having a casing connected to an inlet pipe at the bottom and an outlet pipe at the top as described above, in which a plurality of thin lattice-like collection members are installed in the casing. At the same time, the lower end of the lattice-like collecting member is supported by a partition plate having slits, and a liquid metal recovery chamber having a liquid metal return pipe is provided below the partition plate. A heating device is provided around the casing to maintain the inside of the casing within the melting temperature of the liquid metal, and the casing is maintained at a temperature above the melting point of the liquid metal from an inlet pipe on one side. The liquid metal vapor that has flowed in with the inert gas collides with the thin grid-like collection member, is collected as droplets by the thin grid-like collection member, passes through the grid-like collection member, and exits. The inert gas discharged from the pipe contains less than permissible amounts of liquid metal vapor. Furthermore, the liquid metal collected in the form of droplets on the lattice-shaped collection members grows while growing, since the lattice-shaped collection members are arranged at intervals in the vertical direction. It flows downward over the collection member, enters the liquid metal collection chamber through the slit in the partition plate, and returns to the liquid metal container through the return pipe, so that the grid-like collection can be carried out without the need to temporarily stop the operation of the liquid metal handling equipment. The collecting member can be recycled, which has the effect of not reducing the operating rate of the liquid metal handling equipment.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional side view showing an embodiment of a liquid metal vapor collection device according to the present invention, FIG. 2 is a side view schematically showing a conventional liquid metal vapor collection device, and FIG.
FIG. 4 is a longitudinal sectional side view showing each example of the conventional liquid metal vapor collection device. 7... Inlet pipe, 8... Outlet pipe, 5... Casing, 6a to 6e... Grid collection member, 9... Partition plate, 10... Liquid metal return pipe, 14... Liquid metal recovery chamber.

Claims (1)

[Scope of utility model registration request] A liquid metal vapor collection device having a casing connected to an inlet pipe at the bottom and an outlet pipe at the top, wherein a plurality of thin grid-like collection members are vertically spaced in the casing. At the same time, the inclined lower end of the lattice-shaped collecting member is supported by a partition plate having slits, a liquid metal recovery chamber having a liquid metal return pipe is formed below the partition plate, and a heating device is provided around the casing. hand,
A liquid metal vapor collection device characterized by maintaining the inside of the casing within the melting temperature of the liquid metal.