JPH0125638Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a gas-liquid separation device, in particular a gas-liquid separation device that separates a gas-liquid mixed fluid such as a blowdown tank of a thermal power plant into steam and condensate using swirling force. The present invention relates to a gas-liquid separation device suitable for restricting swirling flow of drain.

[Conventional technology]

BACKGROUND ART Conventionally, as a pressure vessel installed in a thermal power plant or the like, a tank is known that introduces a gas-liquid mixed fluid and separates it into gas and liquid. For example, in a blowdown tank in a thermal power plant, as shown in Figs. 1 and 2, an inlet pipe 2 is attached to the side wall of the tank body 1 along the tangential direction, and a gas-liquid mixture consisting of saturated steam and condensate is We are trying to introduce a rotation. In the tank, steam and drain are separated by swirling force, and the separated steam is passed through the steam outlet pipe 4 attached to the tank upper mirror 3, and the separated drain is passed through the drain discharge pipe 6 attached to the tank lower mirror 5.
Each is discharged outside the tank. In this case, it is necessary to discharge only steam from the steam outlet pipe 4 and only drain from the drain discharge pipe 6. For this reason, the drain discharge pipe 6 is particularly bent into an L shape and the suction port 7 is connected to the tank lower end plate 5. The drain water level is placed at the center of the discharge pipe 6 to prevent steam from being mixed in and discharged.

However, in the conventional tank structure, when the gas-liquid mixed fluid is introduced in a swirling manner, the stagnant drain and separated drain remaining inside are lifted by the swirling force, and as shown in the mesh section A in FIG. This results in drain distribution. Then, the remaining space B becomes a steam region. As a result, a situation occurs in which the drain region A reaches the position of the inlet pipe 2, and the inflow fluid mixes with the drain region, causing water hammer development, which causes damage to the tank. Furthermore, the suction port 7 of the discharge pipe 6 is exposed in the steam region B, and steam is also discharged from the drain discharge pipe 6, causing problems such as impairing the gas-liquid separation function and making it impossible to maintain a constant drain water level. That's what happens.

Therefore, a buffer plate was installed inside the tank to prevent the swirling flow at the top of the tank from mixing with the stagnant drain at the bottom of the tank, thereby solving the above-mentioned problems. Kaisho
It is described in Publication No. 55-28434.

[The problem that the idea aims to solve]

However, in the techniques disclosed in both of the above-mentioned publications, since the buffer plate is flat, the swirling flow flows on the buffer plate as a rectification, and is not satisfactory in terms of obtaining good gas-liquid separation ability. do not have.

An object of the present invention is to provide a gas-liquid separation device that can improve gas-liquid separation efficiency while preventing stagnant drain from being rolled up due to swirling flow.

[Means to solve the problem]

In order to achieve the above object, the present invention provides an inlet pipe on the side wall of the tank for introducing the gas-liquid mixed fluid into the tank from a tangential direction, and a vapor outlet pipe for discharging the separated vapor at the upper part of the tank. In a gas-liquid separation device in which drain discharge pipes for discharging condensate are arranged at the bottom of the tank, a buffer plate having a plurality of through holes is installed inside the tank, and the mounting position of the buffer plate is aligned with the inlet pipe. It is characterized by being set between the drain discharge pipe.

[Effect]

According to the above configuration, when the gas-liquid mixed fluid is introduced into the tank from the inlet pipe, the gas-liquid mixed fluid becomes a swirling flow within the tank, and this swirling flow collides with the through hole of the buffer plate. As a result, the velocity component of the swirling flow in the swirling direction becomes extremely small, which prevents the stagnant drain from being rolled up by the swirling flow.In addition to the gas-liquid separation effect due to the swirling flow, there is a gas-liquid separation effect due to collision, so that the final This makes it possible to significantly improve gas-liquid separation efficiency.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

4 and 5 show a gas-liquid separation device according to the present invention. As shown in the figure, a plurality of gas-liquid mixed fluid inlet pipes 12 are installed slightly above the tank body 11 as in the past.
Attach the steam outlet pipe 14 to the upper mirror 13 as well.
A drain discharge pipe 16 is provided on the lower mirror 15, and the drain pipe 1
The suction port 17 of No. 6 is located close to the bottom surface of the lower mirror 15.

In this embodiment, a buffer plate 18 having a gas-liquid separation function is installed between the gas-liquid mixed fluid inlet pipe 12 and the drain discharge pipe 16, and directly above the drain discharge pipe 16. This buffer board 1
Reference numeral 8 is a disc body attached across the tank body 11 so as to divide it into a swirling flow chamber 19 for gas-liquid mixed fluid and a drain chamber 20 at the lower part. and,
This buffer plate 18 is provided with a plurality of through holes 21 to allow the upper and lower chambers 19, 20 to pass through.

The function of the device for preventing the stagnant drain in the tank from rolling up, which has such a configuration, is as follows. Inlet pipe 1
The fluid flowing in from 2 is separated into gas and liquid by the swirling force while swirling in the circumferential direction of the tank body 11.
It does not act on the lower drain chamber 20, but is rectified through the through hole 21, and no turning force is applied to the stagnant drain. Therefore, the swirling force of the gas-liquid mixed fluid does not cause the stagnant drain to be rolled up, and since this lifting is prevented, the suction port 17 of the drain discharge pipe 16 is not exposed to the steam region. Prevented. Furthermore, the swirling flow of the gas-liquid mixed fluid comes into direct contact with the buffer plate 18, but since the buffer plate 18 is formed from a perforated plate, the through holes 2
By colliding with 1, the gas-liquid separation effect is exerted in the through hole 21, which has the effect of promoting the separation function.

[Effect of idea]

As explained above, according to the present invention, since a buffer plate having a plurality of through holes is provided in the tank, it is possible to prevent stagnant drain from being rolled up, and to significantly improve gas-liquid separation efficiency. becomes possible.

[Brief explanation of the drawing]

Figure 1 is a plan view of a conventional blowdown tank.
FIG. 2 is a longitudinal sectional view of the same, FIG. 3 is an explanatory diagram showing the drain rotation state, FIG. 4 is a longitudinal sectional view of the gas-liquid separation device according to the present invention, and FIG. 5 is a sectional view taken along the line -- of FIG. 4. It is. 11... Tank body, 12... Gas-liquid mixed fluid inlet pipe,
14... Steam outlet pipe, 16... Drain discharge pipe, 17...
Suction port, 18...Buffer plate, 21...Through hole.

Claims (1)

[Claims for Utility Model Registration] An inlet pipe for introducing the gas-liquid mixed fluid into the tank from a tangential direction is provided on the side wall of the tank, and a steam outlet pipe for discharging the separated steam is provided at the top of the tank,
In a gas-liquid separator in which drain discharge pipes for discharging separated drain are arranged at the lower part of the tank, a buffer plate having a plurality of through holes is installed inside the tank, and the installation position of the buffer plate is set to the inlet pipe. and a drain discharge pipe.