JPH04852Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) Around the storage tank of flammable liquefied gas such as LNG,
A dike has been installed. If flammable liquefied gas leaks from this storage tank, some of it will evaporate and become a gas, and if it scatters, there is a risk of a major disaster due to fire. In order to prevent this flammable gas from leaking out in all directions, the dike is made to have a height of 7 m to 15 m, which is higher than the oil tank dike. This high foaming equipment
This is a combustible liquefied gas fire prevention equipment installed on such a liquid barrier.

(Prior technology) High-foaming equipment installed on LNG dikes has a foam discharge port at the top of the embankment wall, but the quality of the foam is highly foamy (e.g., expands 100 to 500 times that of the solution). To,
In the process of extremely light foam descending from the foam outlet,
It was often blown out of the dike by the wind.

(Problems to be solved by the invention) In order to eliminate these drawbacks, this invention proposes a device that reliably guides the foam released from the foam outlet of the high-foaming equipment into the dike. be.

(Means for solving the problem) This invention will be explained with reference to FIGS. 1 and 2.
The liquid barrier is provided around the outer periphery of the flammable liquefied gas storage tank (not shown). A foam outlet 1 of high foaming equipment is provided at the upper part of the embankment wall 2. The foam outlet 1 has its outlet facing downward. The discharge port 1 is continuous below the discharge port 1, and wire meshes 3, 4, and 5 are provided in a frame shape with a cross section of It's summery. And this frame has not reached the bottom 6.

The mesh of the wire mesh 3 may be 1 cm square or less, and the highly foaming solution forms an adhesive film on the mesh and sufficiently serves as a windbreak.

(Function) In this device, when bubbles are discharged from the discharge port 1, the bubbles pass through the frame of the wire meshes 3, 4, and 5 and are deposited in the dike. Even if a considerable amount of wind blows from the left, right, front, and rear, the bubbles will not be blown away and will accumulate from the outlet 1 to the bottom 6.

(Example) The example shown in FIG. 3 is an example in which wire meshes 3 and 4 are provided on the left and right sides of the liquid barrier wall 2 along the foam discharge flow.

Even with the device installed in this manner, the wire meshes 3 and 4 can prevent the wind from blowing not only from left and right but also from front and back.

Further, the frame shape of the wire mesh may be a cylinder or a frame that widens at the end.

Also, part of the wire mesh can be replaced with a steel plate or the like.

All of the above embodiments are included in this invention.

(Effects of the invention) As described above, this invention has the effect of preventing wind from passing through the foam outlet with a wire mesh frame in a device that discharges foam from a high dike, and ensuring that the foam flows out and is deposited inside the dike. be.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the high foaming equipment according to this invention. Figure 2 is a cross-sectional view of the main parts. Third
The figure is a sectional view of main parts according to another embodiment. 1...Bubble outlet, 2...Dike wall, 3, 4, 5
...wire mesh.

Claims (1)

[Scope of utility model registration request] In equipment where a foam discharge port 1 is located on the upper part of the dike wall 2 of a combustible liquefied gas storage tank and which discharges foam into the dike, nets 3 and 4 are placed at least on the left and right sides along with the foam discharge flow from the discharge port 1. High foaming equipment for fire prevention of liquid dike.