JPH03249962A - Composite type separator - Google Patents

Abstract

PURPOSE:To stably and efficiently perform gas-liquid separation even for a gas-liquid mixed phase flow plenty in the liquid phase by introducing the liquid phase which is contained in the gas-liquid mixed phase flow and allowed to flow mainly along the wall face into the clearance between a separation cylinder and a separation wall from the gap between an introduction pipe and an auxiliary introduction pipe. CONSTITUTION:Droplets allowed to mainly flow along the wall face are introduced into the clearance (g) between a separation cylinder 1 and a separation wall 12 from the gap (g) between an introduction pipe 2 and an auxiliary introduction pipe 11. Thereby the droplets are separated by the main flow of the mixed phase flow comparatively little in the droplets in an early stage. Thereafter this main flow of the mixed phase flow is furthermore subjected to gas- liquid separation to enhance the separation performance drastically.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a composite separator that can be used, for example, as a steam-water separator for improving the dryness of steam generated from a boiler.

[Conventional σ technology]

The cyclone separator has a roughly cylindrical separation cylinder with
By introducing a mixed fluid from the tangential direction and swirling it internally, droplets and solid particles are separated to obtain a gas phase fluid.

An example of its use will be explained with reference to FIGS. 3 and 4 for a boiler.

In the drawing, (1) is the separation tube, (2) is the separation tube (1)
- an inlet pipe connected tangentially to the example, (3) is separated vJ (
1) shows the steam outlet pipe attached to the center of the upper end, and (4) shows the droplet outlet pipe attached to the center of the lower end of the separation tube (1).

In the illustrated cyclone separator, steam generated from a boiler is tangentially introduced into the separation tube (1) from the introduction pipe (2), swirled in the separation tube (1), and then liquid droplets (
(saturated water) is centrifuged to improve the dryness of the steam. At this time, the droplet bones separated in the separation tube (1) are drained through the inner wall of the separation tube (1) from the droplet outlet pipe (4) below, but generally, the droplet bones are By re-supplying water to the boiler, the temperature of the water supplied inside the boiler is raised, improving thermal efficiency.

[Problem to be solved by the invention]

In this type of separator, vapor and liquid droplets (
Gas-liquid mixed flows such as saturated water) are said to have poorer separation performance than solid-liquid multiphase flows, and one of the reasons for this is that the gas-liquid mixed flows flow from the inlet pipe (2) to the separation tube ( 1) A considerable amount of the droplet bone flows along the wall of the introduction tube (2), and a portion of the droplet bone flows while floating in the steam (saturated steam: gaseous bone). Can be mentioned. That is, the speed of the droplets flowing along the tube wall is significantly lower than the speed of the above-mentioned vapor flow, so even if they flow into the separation tube (1), the separation effect due to centrifugal force is small, and the droplets flow into the separation tube (1). It scatters from the inner wall or crosses the inside of the pipe, and is re-mixed with the highly dry steam (from which the droplet bones have been separated) heading from the separation tube (1) to the steam outlet pipe (3). become.

For this reason, steam with high dryness cannot be obtained only by using conventional separators in a normal manner.

[Means to solve the problem]

This invention was made in view of the above-mentioned problems, and consists of an auxiliary introduction pipe and a separation wall that perform the same functions as the introduction pipe and the separation cylinder in a single-structure separator. The main feature is a composite separator with built-in separator elements.

[Effect]

According to this invention, by causing the droplet bone flowing mainly along the wall surface to flow into the gap between the separation tube and the separation wall from the gap between the introduction tube and the auxiliary introduction tube, the droplet bone can be quickly removed. By separating the main stream of the multiphase flow with relatively few droplets, and then further separating the main stream of the multiphase flow into gas and liquid,
Separation performance can be significantly improved.

〔Example〕

Figures 1 and 2 show an embodiment of the composite separator according to the present invention, and parts corresponding to those in Figures 3 and 4 are given the same reference numerals and detailed explanations thereof will be given. Omitted.

The above composite separator, as shown in those drawings,
A dividing wall (121) extending along the inner wall of the separation cylinder (1) is installed at the tip of the auxiliary introduction pipe (the introduction pipe Of) is installed inside the introduction pipe (2) with the river substantially coaxial. A desired gap (g) is formed between the inner wall of the separating cylinder (1) and the separating wall (12) that are attached and facing each other.

In this example, the auxiliary introduction pipe 01) is composed of a short pipe, and inside the introduction pipe (2), with a predetermined gap maintained between it and the separation pipe. (1)
It is placed near the connection between the two.

In addition, the separation wall (121) is formed with a predetermined length (for example, several times the diameter of the introduction pipe) upward and downward in the axial direction of the separation cylinder (1) from the connection part with the auxiliary introduction pipe 01. The circumferential length of the end (12a) on the side of the swirling direction (counterclockwise in FIG. 2) of the multiphase fluid that has flowed into the separation tube (1) is in the counter-swirling direction (clockwise in FIG. 2). It is set to be longer than the side end (12b).

In this case, the end of the separation wall (121 on the opposite rotation direction side)
b) is such that the opening of the introduction pipe (2) in the separation tube (1) is sufficiently covered, and the mixed fluid flowing from there through the gap between the introduction pipe (1) and the auxiliary introduction pipe OD, Prevent it from directly flowing into the inner circumferential side of the separation wall.

In the above configuration, when a gas-liquid multiphase flow such as steam generated from a boiler flows into the introduction pipe (1), most of the droplets flow along the inner wall of the introduction pipe (1), as described above. , a part of it floats in the steam (saturated steam: gaseous bones), while the whole flows as wet steam. Of these, what flows along the tube wall flows into the gap between the introduction tube (2) and the auxiliary introduction tube θD, and then flows between the separation tube (1) and the separation wall (12
11 while rotating in the counterclockwise direction, and flows out from the lower outlet pipe (4).

On the other hand, the steam containing the remaining droplet bones (wet steam) directly flows from the introduction pipe (2) into the auxiliary introduction pipe (+2), and first swirls along the inner peripheral surface of the separation wall 0'IJ. Gas and liquid are separated. After the vapor passes through the separation wall end (12a), it flows along the inner circumferential wall of the separation tube (1) while swirling, and the remaining droplets are separated by the centrifugal force caused by this swirling flow. The steam with increased dryness flows into the upper outlet pipe (3), while the separated droplets flow along the inner wall surface of the separation cylinder (1) and flow into the outlet pipe (4). do.

Therefore, according to the composite separator of the present invention, even if steam (or gas-liquid mixed fluid with a large liquid phase content) is extremely dry, the droplet valve (liquid phase bone) that flows along the wall surface After early separation, the main stream of steam with relatively high dryness is further separated, so that steam with consistently high dryness can be obtained.

In the above embodiment, the circumferential length of the separation wall (121) is set to approximately 1/4 of the circumference of the separation tube (1), but at least one of the ends (12a) (12b) may be further extended, or may be extended until both ends (12a) and (12b) are joined to each other to form a cylindrical shape.

Furthermore, the axial length of the separation wall 0 is the same as that of the auxiliary introduction pipe (11
), the lengths are approximately equal in the vertical direction, but the length is not limited to this, and the lower side may be set longer in order to further improve the gas-liquid separation performance.

Although the separator of the present invention has been explained using an example of a steam separator for improving the dryness of steam generated from a boiler, etc., it can also be used in other fields of the chemical industry, etc., to handle gas phase flow and liquid phase flow. Any separator used for separation can be used.

〔Effect of the invention〕

As explained above, the present invention provides a gas-liquid mixed flow that
By introducing the liquid phase bone, which flows mainly along the wall surface, from the gap between the introduction tube and the auxiliary introduction tube into the gap between the separation tube and the separation wall, the multiphase flow main stream with relatively few liquid phase needles can be The structure is such that the liquid phase bones are separated at an early stage, and then the main stream of this multiphase flow is further separated into gas and liquid, so even if the gas-liquid mixed flow contains many liquid phase bones, gas and liquid can be stably and efficiently separated. Separation can be performed, and the separation performance is extremely high.

Furthermore, although the composite separator of the present invention has extremely high performance as described above, it only requires a small separator element consisting of an auxiliary introduction pipe and a separation wall in a conventionally shaped separator. It is easy to manufacture and can be obtained at low cost, and can have great industrial effects.

[Brief explanation of drawings]

1 and 2 show an embodiment of a composite separator according to the present invention, with FIG. 1 being a side view and FIG. 2 being a cross-sectional view of the main part. Figures 3 and 4 show an example of a conventional cyclone separator, with Figure 3 being a side view and Figure 4 being a cross-sectional view of the main part. (1)...Separation tube (2)...Introduction pipe 01)...Auxiliary introduction pipe OZ...Separation wall (g)...Gap

Claims (1)

[Scope of Claims] A cyclone separator having a configuration in which an introduction pipe (2) is connected tangentially to the separation cylinder (1), wherein an auxiliary introduction pipe (11) is arranged substantially coaxially inside the introduction pipe (2). A separation wall (12) installed at the inner end of the auxiliary introduction pipe (11) and extending along the inner wall of the separation cylinder (1).
A composite separator characterized in that a desired gap is formed between the opposing inner wall of the separation tube (1) and the separation wall (12).