JP2005144303A - Gas-liquid separator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas-liquid separator capable of maintaining a high gas-liquid separation efficiency by efficiently separating condensed water falling down along the inner peripheral wall surface of a steam pipe. <P>SOLUTION: An inlet 1 and an outlet 2 are respectively arranged on an inlet flange 3 and an outlet flange 9. An inner pipe 4 is installed between the inlet 1 and the outlet 2. A plurality of through-holes 12, 13 are formed all around the periphery of the inner pipe 4. An outer pipe 8 is fit to the flanges 3, 9 coaxially with the inner pipe 4. A liquid flow passage 5 is formed between the inner pipe 4 and the outer pipe 8. A liquid discharging port 6 is fit to the bottom end of the liquid flow passage 5. The condensed water falling down along the inner peripheral wall surface of the steam pipe is made to flow in the inner pipe 4 from the inlet 1 and pass through the liquid flow passage 5 through the through-holes 12, 13 and discharged to the outside from a valve 11 so that the condensed water can be separated from steam. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a gas-liquid separator that separates liquid such as condensed water or condensed water when steam, compressed air, various gases, or the like flows down in a gas pipe.

  A gas-liquid separator separates the mixed fluid of gas and liquid by filtering with a filter, separates them by centrifugal force by giving a swirling flow, or separates the mixed fluid by colliding with a collision member Is.

  In this gas-liquid separator, the mixed fluid from which gas and liquid are once separated and flowed down in the pipeline until they flow into the gas-liquid separator is essentially unnecessary at the inlet of the gas-liquid separator. Since the gas and liquid were mixed, and then the gas and liquid were separated again in the gas-liquid separator body, there was a problem that the gas-liquid separation efficiency could not be increased to a predetermined value or more.

When a mixed fluid of gas and a small amount of liquid compared to gas flows down in a straight tubular gas pipe, the liquid flows down along the inner peripheral wall surface of the cylindrical pipe. Most of the gas flows down inside the remote pipe, and no water droplets flow down. A small amount of mist-like liquid that cannot be visually confirmed is mixed in the gas and flows down inside the pipe line away from the inner peripheral wall surface. In addition, the liquid does not flow along only the bottom wall surface of the inner peripheral wall surface of the cylindrical pipe line, but also flows along the side wall portion of the cylindrical inner peripheral wall surface or a small amount of the upper wall portion along with the gas flow. To do.
JP 2002-28422 A

  The problem to be solved is that the gas-liquid mixed fluid once separated in the pipeline until it flows into the gas-liquid separator is not mixed at the inlet of the gas-liquid separator. An object of the present invention is to provide a gas-liquid separator that can maintain high gas-liquid separation efficiency by flowing into the separator and separating the gas-liquid.

  In the present invention, in which the mixed fluid of gas and liquid flowing down in the gas pipe is separated into liquid and gas, respectively, a plurality of through holes are provided in the inner pipe substantially along the inner peripheral wall surface of the gas pipe, An outer tube is attached to the outer periphery of the inner tube via a space as a liquid passage, and a liquid discharge port for discharging the liquid from the liquid passage to the outside of the system is provided.

  In the gas-liquid separator of the present invention, a plurality of through holes are provided in the inner tube substantially along the inner peripheral wall surface of the gas pipe, and the outer tube is attached to the outer periphery of the inner tube via a space as a liquid passage. Gas and liquid can be separated by allowing the liquid flowing down along the inner peripheral wall surface of the gas pipe to pass through the plurality of through holes in the inner pipe to the liquid passage, and flow down to the inlet of the gas-liquid separator. The gas and liquid that have already been separated in the straight tubular gas pipeline before mixing are not mixed at the inlet of the gas-liquid separator, and the bottom wall of the inner peripheral wall of the gas pipeline Can be separated from the inner pipe through-holes including not only the liquid flowing down along but also the liquid flowing down along the side wall and upper wall of the inner peripheral wall of the gas pipe. There is an advantage that the flowing gas and liquid can be reliably separated.

  The present invention provides a plurality of through-holes in an inner pipe substantially along an inner peripheral wall surface of a gas pipe, and attaches an outer pipe to the outer circumference of the inner pipe via a space so as to flow down in the gas pipe It can be used to separate liquids such as condensate and condensed water mixed from compressed air, various gases, etc., and only a part of the existing gas pipeline needs to be improved. Can be installed.

  In this embodiment, an example of a gas-liquid separator that separates condensate as condensed water of steam mixed in the steam pipe from steam will be described. In FIG. 1, an inlet flange 3 and an outlet flange 9 in which an inlet 1 and an outlet 2 are formed substantially coaxially, an inner tube 4 and an outer tube 8 attached between both flanges 3 and 9, an inner tube 4 and an outer tube. A gas / liquid separator 7 is configured by the liquid passage 5 provided between the liquid passage 5 and the liquid discharge port 6 attached to the lower end of the liquid passage 5.

  A straight tubular inlet-side steam pipe (not shown) is connected to the inlet 1, and similarly, an outlet-side steam pipe is connected to the outlet 2. The inner diameter of the inlet side steam pipe, the inner diameter of the inlet 1, and the inner diameter of the inner pipe 4 are the same. A plurality of through holes 12 and 13 are provided on the entire circumference of the cylindrical pipe-shaped inner tube 4. The number of through holes 12 and 13 is such that the largest number of through holes 13 are arranged in the lower wall portion of the inner tube 4, and then the smallest number of through holes 12 are formed in the side wall portion of the inner tube 4 (not shown) and in the upper wall portion. Deploy. The cross-sectional shapes of the through holes 12 and 13 have an inclined portion directed toward the inlet 1 on the central axis side of the inner tube 4 and a vertical shape without an inclined portion on the outlet 2 side.

The outer tube 8 is attached coaxially with the inner tube 4 and with the space 5 interposed. The space 5 communicates with the through holes 12 and 13 to form a liquid passage. A liquid discharge port 6 is provided at the lower end of the outer tube 8. A liquid discharge pipe 10 and a valve 11 are attached to the liquid discharge port 6. The valve 11 is preferably one that can arbitrarily adjust the valve opening from a minute opening to a full opening. In the present embodiment, the inner tube 4 and the outer tube 8 are thicker than the inner tube 4. However, even if these wall thicknesses are the same, or the outer tube 8 is thickened. You can also.

  The condensate of the mixed fluid of steam and condensate flowing down from the left side in the inlet side steam pipe connected to the inlet 1 is not only applied to the bottom wall of the inner peripheral wall of the steam pipe but also to the side wall or the upper wall. It flows down along. In this way, the condensate flowing down the inner peripheral wall surface of the steam pipe reaches the inside pipe 4 from the inlet 1 and is guided to the liquid passage 5 from the plurality of through holes 12 and 13, thereby Separated from the steam flowing down the central part. The condensate subjected to the gas-liquid separation is discharged out of the system through the valve 11 from the liquid discharge port 6 of the liquid passage 5. Further, the vapor separated from the condensate flows down from the outlet 2 to a predetermined location.

  In this way, the steam and condensate can be reliably gas-liquid separated from the mixed fluid of steam and condensate flowing down from the steam line to the gas-liquid separator 7.

  Condensate flowing down along the inner peripheral wall surface of the steam pipe can be efficiently separated with a simple configuration.

The cross-sectional block diagram which shows the Example of the gas-liquid separator of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Inlet flange 4 Inner pipe 5 Liquid passage 6 Liquid discharge port 7 Gas-liquid separator 8 Outer pipe 9 Outlet flange 12, 13 Through-hole

Claims (1)

In the case of separating the mixed fluid of gas and liquid flowing down in the gas pipe into liquid and gas, respectively, a plurality of through holes are provided in the inner pipe substantially along the inner peripheral wall surface of the gas pipe. A gas-liquid separator, wherein an outer tube is attached to the outer periphery via a space as a liquid passage, and a liquid discharge port for discharging the liquid from the liquid passage to the outside of the system is provided.

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