JPS5921667B2 - Gas-liquid separation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a gas-liquid separation device equipped with a liquid level control device.

BACKGROUND ART Gas-liquid separators that separate gas and liquid are widely used in chemical plants or hydrothermal geothermal power plants, and various types of gas-liquid separators have been developed.

Centrifugal gas-liquid separator is one of these devices.
As shown in the figure, it has a cylindrical vertical body 1, and an opening 6 is formed in the body 1 so that a gas-liquid supply pipe 5 faces in the tangential direction of the body 1.

The gas-liquid two-phase fluid undergoes a swirling motion S along the inner wall surface of the main body, and is separated into gas and liquid by centrifugal force.

Then, the gas is sent out to the next equipment through the gas outlet pipe 7 provided at the top 2 of the main body 10, and the liquid is sent out through the liquid outlet pipe 8 provided near the bottom 3.

The present invention relates to such a centrifugal gas-liquid separator.

In the above gas-liquid separator, the liquid level is kept at an appropriate level in order to prevent the separated liquid from mixing with the gas and being taken out from the gas outlet pipe 7, and to prevent the gas from being discharged from the liquid outlet pipe 8. Must be retained.

Therefore, a liquid level detection device is provided to control the liquid level by adjusting the amount of discharge from the liquid outlet pipe 8 based on signals from the liquid level detection device.

In addition, as mentioned above, the gas and liquid are supplied into the main body 1 in a rotating motion, so the separated liquid is rotating in the lower part of the main body 1, and the liquid surface draws a paraboloid of revolution. There is.

For this reason, the liquid level must be detected using an appropriate representative value such as the average liquid level.

Figure 2 shows a conventional gas-liquid separator equipped with a liquid level control device.
This shows flJ.

As shown in the drawings, a level header 11 is provided on the liquid outlet pipe 8 to detect the liquid level, and a gauge glass 12 is attached to this.

A pressure pipe 13 that opens at the top 2 of the main body 10 is connected to the level header 11 .

The liquid level in the main body 1 that depicts a paraboloid of revolution is the level header 1.
1, it becomes a horizontal liquid level M indicating the average liquid level.

The liquid level in the gauge glass 12 is converted into an electrical signal or a pneumatic signal and sent to the controller 15, and the flow rate control valve 16 is controlled by the signal from the controller 15.

Furthermore, if the liquid level in the gas-liquid separation device becomes abnormally high, the gas-liquid separation efficiency will decrease, and furthermore, the liquid will flow into the downstream equipment through the gas outlet pipe 7, resulting in a decrease in the efficiency of the power equipment, for example. Problems such as corrosion etc. occur.

For this purpose, a check device 17 is provided in the middle of the gas outlet pipe 7 as shown in the drawing.

The check device 17 consists of a cylindrical vertical tank 18 and a ball float 19. When the tank 18 is filled with liquid overflowing from the main body 1, the ball float 19 floats up and closes the gas outlet pipe 7.

Then, with the gas outlet pipe 7 closed, the amount of gas and liquid supplied is adjusted, and the liquid is urgently discharged from the liquid outlet pipe 8 or each drain valve until a predetermined liquid level is reached.

By the way, the conventional gas-liquid separator configured as described above has the following problems.

In order to detect the liquid level in the main body 1, a level header 11 must be especially provided, which makes the equipment expensive.

Furthermore, when the liquid level inside the main body 1 becomes abnormally high, the check device 17 operates as described above and closes the gas outlet pipe 7, but this cuts off the gas supply to the downstream equipment, and the plant operation will be stopped.

This invention was made in order to solve the above-mentioned problems in conventional gas-liquid separators, and it is possible to accurately detect the liquid level with simple equipment, and even if the liquid level becomes abnormally high, it is possible to accurately detect the liquid level. The present invention aims to provide a gas-liquid separation device that can adjust the liquid level without stopping plant operation.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings.

Figure 3 shows an example of the gas-liquid separation device of this invention.
1 Main body 1, gas-liquid supply pipe 5, gas outlet pipe 7, liquid outlet pipe 8
, a controller 15, and a flow control valve 16 are the same as those of the conventional device shown in FIG. 2, and are given the same reference numerals.

The liquid side communication pipe 23 of the liquid level detection device 21 is connected to the bottom part 3 of the main body 1.
It is provided nearby so as to penetrate through the body wall 4, and the rear end of the liquid side communication pipe 23 is connected to the lower part of the gauge glass 22.

Since the liquid level changes according to the radial position of the main body 10,
The tip of the liquid-side communication pipe 23 is located at a position that indicates an appropriate liquid level as a representative value.

For example, it is desirable that the tip of the connecting tube be separated from the center of the main body 1 by about % to % of the radius.

The gas side communication pipe 24 vertically passes through the main body top 2 and has a tip protruding into the main body 1, and the terminal end of the gas side communication pipe 24 is connected to the upper part of the gauge glass 22.

Since the gas side communication pipe 24 protrudes into the main body 1 as described above, liquid droplets adhering to the top 2 may flow through the gas side communication pipe 24 and into the gauge glass 22, giving an incorrect liquid level indication. There isn't.

The main body 1 is further provided with an emergency liquid discharge pipe 27 at the bottom 3, and an emergency release valve 28 is installed in the middle of this pipe.

A signal from the front controller 15 is input to the operating section of the emergency release valve 28 .

In the gas-liquid separator configured as described above, the amount of liquid discharged is continuously controlled by the flow control valve 16 according to the liquid level detected by the gauge glass 22, and the liquid level is maintained within a predetermined range.

If the liquid level becomes abnormally high for any reason, check the controller 1
The emergency release valve 28 is fully opened by the signal from 5, and the liquid is rapidly released from the liquid discharge pipe 27.

Incidentally, for further safety, the conventional check device 17 may also be used.

As explained above, in the gas-liquid separator of the present invention, in the liquid level detection device, the tip of the liquid side communication pipe is protruded into the main body by an appropriate length to detect the average liquid level, and the gas side communication pipe is also configured to detect the average liquid level. Since it protrudes into the main body to prevent liquid from flowing into the gauge glass, the liquid level can be detected accurately.

Further, in the apparatus of the present invention, the liquid side communication pipe and the gas side communication pipe are directly connected to the gauge glass, so the level header provided in the conventional apparatus is unnecessary, resulting in a simple equipment.

Furthermore, in the device of the present invention, an emergency liquid discharge pipe is connected to the bottom of the main body, and an emergency release valve is provided in this pipe so that liquid that has reached an abnormally high level can be rapidly discharged from the pipe.

Therefore, even if the liquid reaches an abnormally high level, there is no need to block the gas outlet pipe, and gas can always be supplied to downstream equipment, thereby preventing a decrease in the operating efficiency of the plant.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view schematically showing a centrifugal gas-liquid separation device, FIG. 2 is a configuration diagram of a conventional gas-liquid separation device including a liquid level control device, and FIG. 3 is a configuration of the device of the present invention. It is a diagram. 1... Main body, 5... Gas-liquid supply pipe, 7.
...Gas outlet pipe, 8...Liquid outlet pipe, 1
1... Level header, 12, 22...
・Gauge glass, 15...Controller, 16...
...flow control valve, 17... check device, 21-
...Liquid level detection device, 23, 24 ... Communication pipe, 27 ... Liquid discharge pipe, 28 ... Emergency release valve.

Claims (1)

[Scope of Claims] 1. A device for separating gas and liquid by introducing a gas-liquid two-phase fluid into a cylindrical vertical body so as to rotate around the body axis, the liquid level detection device comprising a gauge glass, 1. A gas-liquid separator comprising a liquid-side communication pipe and a gas-side communication pipe that respectively communicate a gauge glass and a main body, and wherein the ends of both communication pipes respectively protrude into the main body. 2 In a device that separates gas and liquid by introducing a gas-liquid two-phase fluid in a circular motion into a cylindrical vertical body, a liquid level detection device is connected to a gauge glass, and a liquid side that connects the gauge glass and the body, respectively. Consisting of a communication pipe and a gas side communication pipe, the tips of both communication pipes protrude into the main body, and a liquid discharge pipe is provided at the bottom of the main body, and a signal from the liquid level detection device is provided to the liquid discharge pipe. A gas-liquid separation device characterized in that it is provided with an emergency release valve that is operated by.