JPS6344117Y2 - - Google Patents

Description

[Detailed description of the invention] A conventional gas-liquid separation tank is shown in FIG. FIG. 1A shows a schematic vertical sectional view of a conventional gas-liquid separation tank, and FIG. A gas-liquid mixture 1' with a low flow rate and dryness is tangentially flowed into the gas-liquid separation tank 5' through an inlet pipe 2', and a gas-liquid mixture 3' with a high flow rate and dryness is tangentially flowed into a gas-liquid separation tank 5' through an inlet pipe 4'. A stream 6' is formed. Gas and liquid are separated in this structure, and the gas is discharged to the outside from an exhaust pipe 7', while the liquid is discharged from a drain pipe 9' with its rotation stopped by a swirl prevention plate 8', which is a so-called cyclone structure. In this structure, the gas-liquid mixture flowing in from the two systems is completely mixed in the tank 5', so it is inevitable that droplets will be re-splattered and entrained as the air velocity increases, resulting in a drop in separation efficiency. As the liquid mixture was released into the atmosphere, hot water fell around the bottom of the boiler frame, creating a safety problem.

The present invention has been devised for the purpose of eliminating the above-mentioned drawbacks, improving the separation efficiency, downsizing, and increasing the processing flow rate of a gas-liquid separation tank.

The present invention provides a gas-liquid separation tank equipped with two inlet pipes that allow fluids of a saturated gas-liquid mixture to flow in in tangential directions to form swirling flows, in which one of the fluids is injected into the gas-liquid separation tank. An internal gas-liquid separation tank for liquid separation and an exhaust connecting pipe connecting the internal gas-liquid separation tank to an exhaust pipe of the gas-liquid separation tank are provided, and the internal gas-liquid separation tank is provided with a drain outlet. The present invention aims to provide a gas-liquid separation tank that can be applied to the separation of water vapor (wet steam or superheated steam) and water in flash tanks for thermal power plants, nuclear power plants, and flash tanks for waste heat recovery plants. .

An embodiment of the gas-liquid separation tank of the present invention will be described with reference to FIG. Figure 2 A is a schematic vertical sectional view of one embodiment of the gas-liquid separation tank of the present invention, and B is B-B of A.
A cross-sectional view is shown. 1 is a gas-liquid mixture with a small flow rate and dryness, 2 is an inlet pipe that introduces the gas-liquid mixture 1 in a tangential direction to the outer circumference of the gas-liquid separation tank, and 3 is a gas-liquid mixture whose flow rate and dryness increase over time from an area where the flow rate and dryness are small. 4 is an inlet pipe that introduces the flow 3 into the tangential direction of the outer circumference of the internal gas-liquid separation tank;
is the gas-liquid separation tank main body, 6 is a swirling flow, 7 is an exhaust pipe, 8 is a rotation prevention plate, 9 is a drain pipe, 10 is the lower end of the exhaust pipe 7, 11 is an internal gas-liquid separation tank, 12
13 is the inlet end of the exhaust connecting pipe 12 and opens below the bottom of the inlet pipe 4; 14 is the outlet end of the exhaust connecting pipe 12 and opens into the exhaust pipe 7. are doing. 15 is a bottom plate of the internal gas-liquid separation tank 11, 16 is a drain outlet provided in the bottom plate 15, 17 is a lower liquid tank, and 18 is a swirling flow of the internal gas-liquid tank 11.

The operation of the present invention will be explained. The gas-liquid mixture 1, which flows tangentially from the inlet pipe 2 into the gas-liquid separation tank 5, has a small flow rate and dryness.
A swirling flow 6 forms inside and gas and liquid are separated, the gas flows into the exhaust pipe 7 and the liquid falls into the lower liquid tank 17.
On the other hand, the gas-liquid mixture 3 with increased flow rate and dryness flows tangentially into the internal gas-liquid separation tank 11 from the inlet pipe 4 and forms a swirling flow 18. Here, when both the dryness and the flow rate are relatively small, most of the gas flows from the exhaust inlet end 13 to the exhaust connecting pipe 12 and the outlet end 1
4 to the exhaust pipe 7, and most of the liquid falls through the drain outlet 16 into the lower liquid tank 17.
On the other hand, in the case of only gas flowing at a large flow rate, by making the flow path area of the drain outlet 16 smaller than the area of the exhaust connecting pipe 12, most of the flow can be exhausted to the exhaust pipe 7, and the drain The flow rate of gas flowing out from the outlet 16 into the gas-liquid separation tank 5 becomes smaller.

The present invention has the above configuration, and has a structure in which the gas part of the flow 3 with a large flow rate is hardly allowed to flow into the swirling separation part of the flow 1. Therefore, the swirling airflow 6 flowing into the exhaust pipe 7 from the lower end 10 almost never flows into the flow 1.
This has the effect of (1) reducing the amount of liquid droplets entrained by the airflow flowing into the exhaust pipe 7, and (2) increasing the swirling speed of the liquid in the liquid tank 17. This has the effect of reducing the amount of liquid re-entrained due to collision with the anti-swivel plate 8 and facilitating drain discharge compared to the conventional type.

[Brief explanation of drawings]

FIG. 1A is a schematic vertical cross-sectional view of a conventional gas-liquid separation tank, B is a cross-sectional view taken along line A-A in FIG. 2A, and FIG. shows a BB sectional view of A. 1... Gas-liquid mixture with small flow rate and dryness, 3
... Gas-liquid mixture with increasing flow rate and dryness, 5...
... Gas-liquid separation tank, 11 ... Internal gas-liquid separation tank, 7 ... Exhaust pipe, 12 ... Exhaust connection pipe.

Claims (1)

[Scope of utility model registration request] In a gas-liquid separation tank provided with two inlet pipes each of which allows a fluid of a saturated gas-liquid mixture to flow in in a tangential direction to form a swirling flow, the gas-liquid separation tank includes an interior for separating one of the fluids into a gas-liquid. A gas-liquid separation tank and an exhaust connecting pipe connecting the internal gas-liquid separation tank to an exhaust pipe of the gas-liquid separation tank, and the internal gas-liquid separation tank is provided with a drain outlet. Separation tank.