JPS592804Y2 - gas liquid separator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a separator that separates a so-called gas-liquid two-phase flow, in which gas and liquid are mixed and flowing, into liquid and gas.

A typical flow form of the gas-liquid two-phase flow flowing into this type of separator is shown in FIG.

That is, a wavy flow A in which gas 2 and liquid 3 flow in horizontal pipe 1 in two phases divided into upper and lower phases, piston flow B in which gas 2 flows in a large piston shape in liquid 3, and gas 2 flows in liquid 3. Bubbly flow C1 and gas 2 that flow as bubbles inside
This is a uniform flow in which the liquid 3 is uniformly dispersed and flows.

The type of force that belongs to the flow form of actual printing cannot be said to be one type because it is complicatedly influenced by the viscosity of the gas/liquid flowing in the pipe, the surface effort, the flow velocity, and even the pipe diameter.

However, it is certain that this flow rate has a great influence on the separation performance of the gas-liquid separator. While gas-liquid separation is easy in the case of flow A and piston flow B, it is difficult to separate gas and liquid in the case of bubble flow C and uniform flow.

In view of the above, the applicant has already developed a gas-liquid separator that can easily separate gas and liquid, especially in the case of bubble flow C or uniform flow.

This gas-liquid separator (hereinafter simply referred to as the preceding separator) is as shown in FIG.

At the center of the interior of the main body 10 forming the outer shell, there is disposed a clasp 15 that has a plurality of holes 12 for air bubble passage on the side surface 11, is sealed at the lower end with a cover 13, and is open at the upper end 14. .

This cylinder 15 is fixed to the main body 10 by a spiral partition plate 18 so that an upper space 16 and a lower space 17 are formed above and below between the cylinder 15 and the main body 10.

The partition plate 18 is mounted at an angle so that the side of the cylinder 1E is high and the side of the main body 10 is low. It is arranged as if it were located.

As a result of arranging the partition plate 18 as described above, a spiral passage 19 is formed between the partition plate 18, the main body 10, and the cylinder 1E.

An inlet 20 tangential to the main body 10 is formed at the top of the spiral passage 19, and a gas-liquid two-phase flow is introduced into the main body 10 through the inlet 20.

According to the preceding separator configured as described above, the main body 1 is
The gas-liquid two-phase flow that has flowed tangentially toward zero is guided by the spiral passage 19 and descends in a circular motion, while the bubbles move upward due to their buoyancy, and the liquid moves outward due to the circular motion. The bubble moves towards the center because it is pushed in the direction of
As a result, the bubbles rise obliquely upward toward the center and gather on the lower surface of the partition plate 18, and the bubbles combine to grow into larger bubbles.

The bubbles grown in this way pass through the hole 12 of the cylinder 15 and flow into the cylinder 1.
In this case, since the liquid inside the tube 15 is substantially stationary, the bubbles rise very quickly inside the tube 15 and reach the upper space 16.

When the amount of gas in the upper space 16 increases, the liquid level decreases,
As a result, the float 21 is lowered, so the valve 22 that operates in conjunction with the float 21 is opened, and the gas in the upper space 16 is discharged to the outside of the system.

When the liquid level recovers with discharge, the valve 22 closes.

On the other hand, the liquid from which the gas has been separated flows out from the outlet 23.

In this way, the advance separator has a large ability to combine small bubbles and grow them into large bubbles, which improves the separation performance. Even if the gas is separated, ensure gas separation.

However, a type with a helical passage 19 like the preceding separator has a larger pressure loss than the conventional packet type or cyclone type, and may cause undulating flow A or piston flow B in Fig. 1. In the case of a flow form in which the amount of gas is considerably large, the gas cannot completely flow into the interior of the cylinder 15 through the hole 12 of the cylinder 15, and a part of the gas is led to the outlet 23 and flows out together with the liquid. There is also a risk of it getting lost.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a gas-liquid separator that eliminates the problems of the conventional method and also eliminates the problems that may arise due to the preceding separator having a spiral passage.

Specific examples will be explained below based on the drawings.

As shown in FIG. 3, in the present invention, a spiral partition plate 1
8, the main body 10, and the tube 15, and the center of the inlet 20. The inlet 20 is attached in the tangential direction of the main body 10 so that the two are located apart from each other by a distance (from the top 18a).

As a result, a gas separation space 24 is formed from the inlet 20 to the top 19a of the spiral passage 19, where large air bubbles are separated.

In this example, the overall length of the partition plate 18 in the vertical direction is shortened, but instead of this, the overall length of the main body 10 may be increased and the inlet 20 may be attached further to the upper part of the main body 10. The shape can be arbitrarily determined depending on the flow form that the inflowing gas-liquid two-phase flow can take.

The top 19 of the helical passage 19 in any shape
The ratio h/d between the distance from a to the center of the inlet 20 and the diameter d of the inlet 20 is preferably in the range of 2 to 5, and if this ratio is smaller than this, it will affect the liquid level. On the other hand, even if it becomes larger, no great effect can be expected, and the capacity of the main body 10 will increase.

The rest of the structure of the present invention is the same as that shown in FIG.

According to the present invention, the gas-liquid two-phase flow that has flowed into the main body 10 from the inlet 20 passes through the inlet 2 above the spiral partition plate 18.
The gas is first guided into the gas separation space 24 located below zero, where it is forcibly swirled, so even if the flow form has a large amount of gas, such as the wavy flow A or the piston flow B, this forced swirl will not occur. During this process, gas separation becomes possible, and the amount of gas in the descending liquid decreases, similar to bubble flow or uniform flow.

In this way, the liquid with a reduced amount of gas flows through the spiral path 1.
9, the gas is separated while descending along this passage 19, collects on the lower surface of the partition plate 18, and gradually grows while moving toward the hole 12 along this lower surface to form large bubbles. is formed.

These large bubbles enter the interior of the tube 15 through the hole 12, quickly rise, and are collected in the upper space 16.

The gas that is not separated while descending the spiral passage 19 reaches the lower space 17 together with the liquid, but since the flow velocity in this lower space 17 is lower than that in said passage 19, the gas flows into this lower space. 17, and the liquid flowing out from the outlet 23 contains almost no gas.

According to the present invention, stable separation performance can always be obtained no matter what the flow form, and since the bubble passage is separate from the descending passage of the liquid, the separated gas will not be caught in the falling liquid.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing a typical flow form of gas-liquid two-phase flow;
FIG. 2 is a sectional view of a previous separator developed by the applicant, and FIG. 3 is a sectional view of the gas-liquid separator of the present invention. 10... Body, 12... Hole, 15...
... tube, 18 ... partition plate, 19 ...
・Spiral passage, 20...Inflow port, 23...
... Outlet, 24... Gas separation space.

Claims (1)

[Scope of utility model registration request] A gas-liquid separator that separates a gas-liquid two-phase flow into liquid and gas includes a main body having an inlet at the top and an outlet at the bottom, a plurality of holes for bubble passage on the side, and an upper end. A tube with a smaller diameter than the main body is opened, and a partition plate is provided in the side annular portion between the tube and the main body to partition this annular portion into a spiral shape, and a partition plate is provided between the inflow port and the outflow port. A spiral passage is formed, the partition plate is inclined radially from the center of the cylinder so that the part side is high and the main body side is low, the plurality of holes drilled in the cylinder are located close to the lower surface of the partition plate, and the The inlet is located above the top of the helical passage so that a large space for separating bubbles is formed between the inlet and the top of the helical passage, and the inlet is higher than the inlet. A gas-liquid separator with a gas discharge mechanism installed above.