JPS6116480Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for safely dissipating excess gas to the outside of a water-filled gas holder when stored gas exceeding the appropriate capacity is supplied to the holder. be.

The gas generated in converters and blast furnaces is normally continuously sent to and stored in a water-filled gas holder whose bottom is sealed with water.If the gas is still sent to the gas holder even after exceeding a certain capacity, excess The supplied gas is dissipated to the outside. The structure of the water-filled gas holder will be explained with reference to FIG. 1. The gas holder 1 is an expandable storage tank consisting of a combination of three tanks: an inner tank 11, a middle tank 12, and an outer tank 13. 2 with an open bottom, and the bottom is sealed with water to accommodate gas inside. A guide roller 14 is integrally protruded from the side surface of the outer tank, and is engaged with a guide column 3 vertically installed along the edge of the tank, whereby the gas holder 1 corresponds to the amount of gas accommodated. It is designed to expand and contract smoothly. The gas holder 1 has a converter 4
A supply pipe 5 is provided to guide gas into the holder, but if more than a predetermined amount of gas is supplied into the holder, the gas may blow out from the bottom of the outer tank 13, or from the water seal or the ceiling of the holder. Therefore, it is necessary to stop the supply of excess gas and dissipate it to the outside. For this reason, in the past, as shown in FIG. 1, a branch passage 51 was provided in a part of the supply pipe 5, and this was led to a diffusion tower 52, and when the inner tank 11 reached a certain height, a level meter was installed. Detecting this, the valve 53,
54 at the same time to dissipate excess gas. In such conventional equipment, the maximum height of the inner tank was set at 90% of the usage limit in consideration of the safety factor, which resulted in poor usage efficiency and complicated equipment for the emission path, resulting in high costs. There was a drawback.

The purpose of this invention is to eliminate these conventional drawbacks,
An object of the present invention is to provide an emergency dissipation device that allows a gas holder to be used with high efficiency.

The emergency dissipation device of the present invention has an opening formed in the flooded part of the lower part of the outer tank of the gas holder at a position above the lower edge of the outer tank and below the water level in the outer tank during normal storage; The gas dissipation tube is composed of a guide tube whose lower end is connected in communication with the gas holder, and a gas dissipation tube which is vertically fixed to the guide column of the gas holder and connects the upper part of the guide tube in a telescopic manner.

In the apparatus of this embodiment, as shown in FIG. 2, the supply pipe 5 is provided with respect to the holder 1 without any special structure. That is, in the lower submerged portion of the outer tank 13, which is the lowest stage of the holder 1, a gas discharge opening 6 having a relatively wide opening range is provided as shown in FIG. This opening is located above the lower edge of the outer tank 13 and below the water level in the outer tank 13 during normal storage, that is, when the amount of gas introduced into the gas holder 1 reaches, for example, 98% of the usage limit. It is provided at a position where excess gas fed into the holder can be discharged to the outside of the holder, and the hole is bored by calculating the distance d from the water surface to the opening.

A guide tube 61 is connected in communication with the portion where the opening 6 is provided, and is configured to guide the gas released from the opening 6 to the upper side of the water tank 2.
The upper end of the guide column 3 is telescopically fitted into a radiation tube 62 which is vertically fixed to the guide column 3. Guide tube 6
The fitting portion 1 is engaged so as to be slidable as the holder 1 moves up and down, and as shown in FIG. 3, the length H of the fitting portion is such that the outer tank 13 is at the highest position In this case, the fitting allowance between the diffusion tube 62 and the guide tube 61 is ensured to the extent that the gas is not ejected to the outside.

A pipe or duct is connected to the distal end of the dissipation tube 62, and the dissipation tube is guided to a safe high place and dissipated into the atmosphere. The number of guide tubes and diffusion tubes to be installed varies depending on the amount of gas generated, the capacity of the holder, etc., and is calculated and determined depending on the case. The calculation side of the emission amount is explained below.

Holder capacity 50.000m ^3Holder internal pressure 300mmAq Gas density 1.362Kg/Nm ^3If we look at the pressure loss when the cross-sectional area of the discharge pipe is ^0.2m2 , we have: 1 Pressure drop from the outer tank to the inflow △P ₁ = γ/2g (Q/A) ² = 0.87×1.362/2×9.8×(Q/0.2)
² = 1.574Q ² 2 Pressure loss of discharge pipe (as a 500φ straight pipe)
500φ=0.196m ² △P ₂ = λ1/αγ/2g (Q/A) ² = 0.02×30/0.5×1.362/2×9.8×
(Q/0.2) ² = 2.085Q ² 3 Pressure loss at the discharge part △P ₃ = γ/2g (Q/A) ² = 1.362/2 x 9.8 x (Q/0.2) ² = 1.
737Q ² 4 Total △P=△P ₁ +△P ₂ +△P ₃ =5.396Q ² =300mmAq Therefore, the number of installed gas generation amount/dissipation amount = 120000m ³ /H/26.90
0m/N lines = 4.46, so 5 lines need to be installed.

It goes without saying that by installing the emergency dissipation device of this invention, it is possible to prevent poisoning and fires caused by gas ejections, but since it has become possible to raise the upper limit of use of the holder to 98%, the amount of gas recovered can be reduced. This increased the utilization efficiency. Furthermore, since the device itself has a simple configuration, it does not require much equipment cost and has many advantages, such as being less likely to malfunction.

[Brief explanation of the drawing]

FIG. 1 is a side view of a water-type gas holder equipped with a conventional emergency dissipation means. FIG. 2 is a side view of a gas holder equipped with the emergency dissipation device of the present invention. FIG. 3 is an enlarged cross-sectional view of the main parts of the device according to the present invention. FIG. 4 is a front view seen from the - direction of FIG. 3. 1: Gas holder, 11: Inner tank, 12: Middle tank, 1
3: Outer tank, 2: Water tank 3: Guide support, 4: Converter,
5: Supply pipe, 6: Opening, 61: Guide tube, 6
2: Diffusion tube.

Claims (1)

[Scope of utility model registration request] An opening is formed in the flooded part of the lower part of the outer tank of the gas holder at a position above the lower edge of the outer tank and below the water level in the outer tank during normal storage, and the lower end is connected in communication with the opening. An emergency dissipation device for a water-type gas holder, which comprises a guide tube formed of a gas holder, and a gas dissipation tube that is vertically fixed to a guide column or the like of the gas holder and that fits and connects the upper part of the guide tube in a telescopic manner.