JPS6257604A - Vapor trap device - Google Patents

Abstract

PURPOSE:To allow the titled device to exhibit its function even in an unsteady state and to miniaturize the device by providing the main vessel body, a packing material for removing vapor and mists, a mechanism for cooling the main vessel body from the outside and a heat sink which is arranged on this side of the packing material in the flowing direction of the gas. CONSTITUTION:Plural annular packing materials 4 are fixed to a supporting rod 3 in a cylindrical vessel 1 through a supporting plate 5 and a spacer 6. A cover gas flows into the vessel 1 through a heat sink 21 and liq. metals vapor and mists are removed by the annular packing material 4. Although the temp. of the cover gas is not lowered by the heat sink 21 in a steady state, the temp. is lowered by the heat sink 21 in an unsteady state and the cover gas at the same temp. as the gas in the steady state flows into the vessel 1. Consequently, the temp. of the cover gas need not be lowered by the annular packing material 4 and the device can be miniaturized. A cooling duct 13 is furnished on the outer periphery of the vessel 1 and the packing material 4 is cooled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement in a Beba trap device for removing vapor or mist of liquid sodium in a cover gas, for example, in a liquid metal cooled fast breeder reactor.

[Technical Background of the Invention] Liquid metallic sodium is generally used as a coolant in fast breeder reactors. At this time, a Bever trap device is provided to prevent vapor or mist of the liquid sodium from entering the gas system and depositing on gas system equipment. This Bevertrap device cools the body to lower the temperature of the filler filled inside the body than the saturated vapor temperature of the liquid metal contained in the gas, and uses the filler to trap liquid metal vapor and mist. It is to be removed.

[Problems with background technology] According to the above configuration, there were the following problems.

That is, in the function of the Bever trap device, there is a steady state in which the flow l and temperature of the gas flowing into the Bever trap are constant, and a steady state in which the flow of gas flowing into the Bever trap and the temperature are constant, and a steady state in which the high temperature gas suddenly enters the Bever trap.
There are two operating states: an unsteady state flowing into the In order to provide the specified performance even under unsteady conditions, the length of the body of the Bevertrap is generally determined for the maximum temperature and maximum flow rate under unsteady conditions; In some cases, the equipment was oversized, and there was a need to downsize the equipment without degrading performance.

[Object of the invention] The present invention has been made based on the above points, and its purpose is to be able to exhibit a specified performance even in an unsteady state, and to reduce the cost by reducing the size of equipment. It is an object of the present invention to provide a Bevertrap device capable of reducing the amount of water.

[Summary of the Invention] That is, the Bevertrap device according to the present invention includes a container body having a cover gas inlet and a cover gas outlet;
A filling material that removes vapor and mist in the cover gas introduced into the container body via a support member, a cooling mechanism that cools the filling material from the outside of the container body, and a cooling mechanism that cools the filling material from the outside of the container body. The special 1vl is that it includes a sink and a pipe 1 installed on the front side of the filler in the direction of flow of the cover gas.

In other words, when high-temperature cover gas suddenly flows in as in an unsteady state, the heat sink cools the cover gas, reducing the cooling capacity required when it passes through the filler. Therefore, we aim to provide a device that does not require a large capacity even in an unsteady state.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a longitudinal cross-sectional view showing the structure of the Bebatrap@Mushroom according to this embodiment, and reference numeral 1 in the figure is a cylindrical container. The upper opening IAG of this cylindrical container 1 is closed by a lid 2. This lid body 2 has a support rod 3 projecting inside the cylindrical container 1. A plurality of annular fillers 4 are attached to the support rod 3 via support plates 5 and spacers 6. A nut 7 is screwed onto the lower end of the support rod 3, and fixes the plurality of annular fillers 4.

A cover gas inlet nozzle 11 is connected to the bottom of the cylindrical volume H1, and a cover gas outlet nozzle 12 is connected to the upper end of the cylindrical container 1. In addition, the cylindrical volume B
Cooling ducts 1 to 13 are arranged on the outer periphery of the cooling duct 1 . By flowing a cooling medium through the cooling duct 13, the annular filler 4 is cooled to below the saturation temperature of the cover gas, and vapor or mist is removed.

A heat sink 21 is installed at the bottom of the cylindrical container 1. This heat sink 21 is made of, for example, austenitic stainless steel or carbon steel. Further, the heat sink 21 has a plurality of through holes 22 in the axial direction of the cylindrical container 1, and the cover gas flows through the through holes 22.

The operation will be explained based on the above configuration. First, the steady state case will be explained. That is, FIG. 2(A) and <
As shown in 8), the cover gas flow rate and cover gas temperature are constant until time tl. At this time, the temperature of the heat sink 21 is approximately the same as the temperature of the inflowing cover gas. Therefore, the temperature of the cover gas does not decrease in the heat sink 21, and the inflowing cover gas is cooled when passing through the annular filler 4 and lowered to below the saturation temperature. As a result, the liquid gold gas and mist are removed by the annular filler 4.

Next, a case of an unsteady state in which the cover gas flow rate and temperature rapidly increase after time tl will be described. In this case, since there is a temperature difference between the inflowing cover gas and the heat sink 21, when the cover gas passes through the heat sink 21, it is cooled and its temperature decreases as shown by the chain line in FIG. As a result, the temperature of the cover gas when passing through the heat sink 21 is approximately the same as that in the steady state. Comparing this with the case where the heat sink 21 is not provided is shown in Fig. 2 (B
), when the sink 21 is not turned on, the temperature must be lowered by the annular filler 4 spanning ΔT, whereas in this embodiment, only ΔT2 is sufficient. Therefore, it is not necessary to construct the equipment assuming an unsteady state as in the conventional case, and it is possible to effectively reduce the size of the device and the cost.

[Effect 1 of the Invention] As described above, the Bevertrap device according to the present invention can sufficiently exhibit its functions even in an unsteady state.

In addition, the device can be made smaller, which is extremely effective in reducing costs.

[Brief explanation of drawings]

1 and 2 are diagrams showing one embodiment of the present invention, and FIG. 1 is a diagram showing the structure of a vapor 1-lap device without showing changes over time. 1... Cylindrical container (container body), 2... Lid, 3...
・Support rod, 4... Annular filler, 5... Support plate, 6.
...Spacer, 11...Cover gas inflow nozzle, 12
... Cover gas outflow nozzle, 21 ... Heat sink, 22 ... Gate hole. Applicant's agent Patent attorney Takehiko Suzue ↑ Haku 1 Ward

Claims (1)

[Claims] a container body having a cover gas inlet and a cover gas outlet; a filler that is attached to the container body via a support member to remove vapor and mist in the introduced cover gas; and a filler that is filled from the outside of the container body. A Bevertrap device comprising: a cooling mechanism for cooling the filler; and a heat sink installed in the container body on the front side of the filler in the cover gas flow direction.