CN105169814B - Gas-liquid separator - Google Patents

Abstract

A gas-liquid separation device, the gas-liquid separation device includes a separator, a hollow chamber is formed in the separator, the separator also includes a separator inlet and a separator outlet, and the separator inlet and the separator outlet are respectively communicated with the hollow chamber , wherein the flow area for gas flow in the hollow chamber is larger than the flow area for gas flow in the inlet of the separator. The gas-liquid separator has a simple structure, is easy to manufacture and install, has high separation efficiency, and can be applied to occasions where the gas flow rate is less than 10kg/h.

Description

Gas-liquid separation device

technical field

The invention relates to a gas-liquid separation device, which can be used in an aircraft, especially in a pipeline for supplying gas to a pneumatic regulating valve in the aerodynamic system of the aircraft.

Background technique

In the pneumatic system of an aircraft, especially a civil airliner, the pneumatic regulating valve realizes the regulation of gas pressure or flow through electronic control (such as through a solenoid, an electric torque motor, etc.) and a gas-driven valve regulating mechanism. In order to adjust the operating state of the pneumatic control valve, it is necessary to set up a bleed air pipeline to provide operating gas to the adjustment mechanism and actuation mechanism of the pneumatic control valve for the adjustment and actuation of the valve.

Due to the limited space in the aircraft, the installation location of the bleed air line is also limited. Therefore, the bleed air pipeline used for pneumatically adjusting the valve in the aircraft is often long and needs to pass through multiple different areas in the aircraft. There is a certain temperature difference between these areas, and sometimes even a large temperature difference, so the gas provided by the bleed air pipeline will produce condensed water in the process of passing through different areas. In addition, sections of the bleed air line are at different levels, creating low spots where condensate tends to accumulate in the bleed air line. Therefore, liquid water is entrained in the gas flowing through the bleed line.

If the liquid water enters the adjustment and actuation mechanism of the pneumatic control valve, the working reliability of the valve will be affected. Therefore, it is necessary to install a gas-liquid separation device on the bleed air pipeline that supplies gas to the pneumatic control valve to separate liquid water from the gas and prevent the gas from entraining liquid water to the adjustment and actuation mechanism of the pneumatic control valve.

At present, there are many types of gas-liquid separation devices commonly used in engineering, and their separation methods mainly include the following: gravity sedimentation, flow separation, centrifugal separation, screen separation, ultrafiltration separation and packing separation. From the perspective of separation principle, the above-mentioned types of gas-liquid separation devices can be divided into two categories:

One is to use the difference in the mass of the components to separate the mixture. Specifically, the density of gas and liquid are different, and the inertia of motion in the flow process is also different. Gas and liquid can be separated by using the difference in inertia of gas and liquid. Gravity settling, flow separation, centrifugal force separation and packing separation methods fall into this category.

The other is to use the difference in the particle size of the dispersion system of the substance to separate the mixture. Generally speaking, the accumulation state of liquid molecules is different from the accumulation state of gas molecules. The distance between gas molecules is larger, while the distance between liquid molecules is smaller, so the gas particles are smaller than the liquid particles. Thus, gases and liquids can be separated by a device such as a screen. Screen separation and ultrafiltration separation methods fall into this category.

However, the gas-liquid separation devices currently used in engineering have their limitations. For example, the separation efficiency of the gravity sedimentation separation device is low, and at the same time, its volume is relatively large and takes up a large space; The range of the load, for example, if the flow rate of the gas-liquid mixture is too large or too small, the separation efficiency will drop sharply, and the resistance of the separation flow separation device will be relatively large. In addition, the working load range of most gas-liquid separation devices in use at present is that the gas flow rate is above 100kg/h. However, in the valve actuation system of the aircraft, the air flow rate is usually less than 10kg/h, and the gas flow rate is relatively high. If the current common gas-liquid separation device with a working load range of more than 100kg/h is used for an aircraft, its separation efficiency will decrease.

Therefore, there is a need for a gas-liquid separation device with higher separation efficiency that can be used under a load of 10 kg/h or less.

Contents of the invention

The present invention is made in view of the technical problems existing in the prior art disclosed above. The purpose of the present invention is to provide a gas-liquid separator with higher separation efficiency, which is suitable for the load condition below 10kg/h.

The above object of the present invention is achieved by a gas-liquid separation device, wherein the gas-liquid separation device includes a separator, a hollow chamber is formed in the separator, and the separator also includes a separator inlet and a separator outlet, respectively The hollow chambers communicate, wherein the flow area for gas flow in the hollow chamber is at least larger than the flow area for gas flow in the inlet of the separator.

By setting a hollow chamber with a large gas flow area in the separator, when the gas flows into the hollow chamber from the inlet of the separator, the gas will experience the process of expanding and absorbing heat, so that the water vapor entrained in the gas will condense and gather, and settle down as the gas flows from the separator inlet to the separator outlet. In this way, moisture can be effectively separated from the gas. Moreover, it can be seen that the gas-liquid separation device with the above structure has a simple structure, can be processed by metal, and can also be made relatively small in size and light in weight, so it is easy to install. Moreover, there are no moving parts in the gas-liquid separation device, so it is easy to clean and maintain, and has a long service life. The gas-liquid separation device is especially suitable for applications where the gas flow rate is low (for example, below 10kg/h), such as the bleed air pipeline of the aircraft.

Preferably, the hollow chamber includes a main chamber and a top chamber located near the top of the separator, the top chamber is in fluid communication with the main chamber, and the flow area for the gas flow in the main chamber is larger than that for the gas in the top chamber. The flow area for gas flow. In this way, the gas flow path in the separator can be extended, and the gas-liquid separation efficiency can be further improved.

Preferably, the separator inlet communicates with the main chamber and the separator outlet communicates with the top chamber. Alternatively, and more generally, the separator inlet and separator outlet are arranged such that the separator outlet is at a higher level than the separator inlet. In this way, when the gas flows from the inlet of the separator to the outlet of the separator, there is a rising process, which can further promote the gravity settlement of the liquid (such as condensed water).

Further, the gas-liquid separation device also includes: an air intake assembly, the air intake assembly includes an air intake pipe, and one end of the air intake pipe is connected to the separator inlet; and an exhaust assembly, the exhaust assembly includes an exhaust pipe, and the exhaust pipe Connect one end to the separator outlet.

Preferably, a first seal is provided at the connection between the intake pipe of the intake assembly and the inlet of the separator, and/or at the connection between the exhaust pipe of the exhaust assembly and the outlet of the separator A second seal is provided.

Furthermore, the top of the separator can also be covered with a closure. The enclosure is mounted on the separator by at least one fastener and/or a third seal is provided between the enclosure and the separator. Thereby, the closure is fixed on the separator and a seal between the separator and closure is ensured.

In a preferred embodiment, a motor is provided in the outlet of the separator, and by operating the motor, the flow area for gas flow in the outlet of the separator can be adjusted.

Further, an intake air humidity sensor can be arranged in the air intake pipe of the air intake assembly, and an exhaust humidity sensor can be arranged in the exhaust pipe of the exhaust assembly, and the controller of the gas-liquid separation device can receive information from the intake air humidity sensor and the exhaust air. The gas moisture content measurement data of the gas humidity sensor is used to control the operation of the motor according to the measurement data.

Through the above structure, the flow rate or flow rate of the gas in the separator can be adjusted according to the actual water content of the gas, thereby adjusting the gas-liquid separation effect of the separator.

In a preferred configuration, the inlet duct is arranged such that the axis of the inlet duct forms an angle of less than 90 degrees with the tangential direction of the inner wall of the hollow chamber at the inlet of the separator. In this way, the flow direction of the gas entering the hollow chamber is tangential or tends to be tangential, so that a vortex can be formed in the hollow chamber, and the gas-liquid separation efficiency is further improved by centrifugal action.

A drain hole is also provided at the bottom of the hollow chamber for draining liquid water separated from the gas.

Description of drawings

Fig. 1 is a perspective view of the gas-liquid separation device of the present invention.

Fig. 2 is a cross-sectional view of the gas-liquid separation device of the present invention.

Fig. 3 is a partial enlarged view of the top of the gas-liquid separation device shown in Fig. 2 .

detailed description

Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that what is shown in the figure is only a preferred embodiment of the present invention, and those skilled in the relevant art can make various equivalent transformations to the details, and these equivalent transformations are also within the scope of protection required by the present invention. .

Fig. 1 shows a perspective view of a gas-liquid separation device 1 of the present invention. As shown in FIG. 1 , this gas-liquid separation device 1 has a separator 10 . The gas-liquid separation device 1 also includes an intake assembly 20 and an exhaust assembly 30, which are respectively connected to the separator inlet 13 and the separator outlet 14 of the separator 10 (see FIG. 2 ).

FIG. 2 shows a cross-sectional view of the gas-liquid separation device 1 , which clearly shows the internal structure of the gas-liquid separation device 1 . A hollow chamber is formed in the separator 10 of the gas-liquid separation device 1 , and a separator inlet 13 and a separator outlet 14 are respectively in fluid communication with the chamber.

As shown in FIGS. 1 and 2 , the gas-liquid separation device 1 further includes a closure 40 covering the top of the separator 10 . The closing member 40 is used to close the hollow chamber in the separator 10 to isolate the hollow chamber from the outside world. Illustratively, closure 40 may be secured to separator 10 by at least one (three are shown in FIG. 1 ) fasteners 41 .

In the exemplary configuration shown in FIG. 2 , the chambers of the separator 10 include a generally cylindrical main chamber 11 and a top chamber 12 located near the top of the separator 10 . The top chamber 12 is more clearly shown in the enlarged view shown in FIG. 3 , wherein the top chamber 12 communicates with the main chamber 11 . Further, as shown in FIG. 2 , the separator inlet 13 leads into the main chamber 11 , while the separator outlet 14 communicates with the top chamber 12 .

Thus, the gas provided by the bleed air pipeline to the pneumatic valve flows from the intake assembly 20 through the separator inlet 13 into the main chamber 11 , then flows into the top chamber 12 , and then flows out from the exhaust assembly 30 through the separator outlet 14 .

When the gas flows into the chamber of the separator 10 from the inlet assembly 20 through the inlet 13 of the separator, the flow area of the gas will suddenly expand, and the gas undergoes an expansion and heat absorption process, thereby producing a cooling effect on the gas entering the chamber. At this time, the water vapor entrained by the gas will condense and be separated due to the gravitational settling phenomenon during the process of the gas flowing into the chamber of the separator 10 from the inlet 13 of the separator to flowing out of the chamber from the outlet 14 of the separator. In addition, when the gas flows into the chamber, the gas flow will hit the wall of the chamber, which will form a local vortex. Such localized eddies help to separate entrained liquids (such as water droplets) from the gas.

In order to further improve the separation efficiency of the gas-liquid separation device 1 , the separator outlet 14 can also be set at a higher level than the separator inlet 13 . Thus, the gas flow passing through the separator 10 needs to go through an upward process. During the rising process of the air flow, part of the liquid water will be separated from the gas under the action of the separation flow effect, thereby further improving the separation efficiency of the gas-liquid separation device 1 .

In order to prolong the residence time of the gas in the main chamber 11 to further enhance the gas-liquid separation effect, the flow area of the top chamber 12 can be set to be smaller than the flow area of the main chamber 11 . In this way, more liquid water can be separated during the flow through the chambers in the separator 10 .

A drain hole 16 is provided at the bottom of the chamber, specifically at the bottom of the main chamber 11 . The liquid water separated from the gas is drained through the drain hole 16 .

Preferred embodiments of the intake assembly 20 and the exhaust assembly 30 will be described below.

As shown in Figure 2, the main body of the air intake assembly 20 is an air intake pipe 21, and one end of the air intake pipe 21 is connected in the separator inlet 13 of the separator 10, such as by commonly used connections such as threaded connection and buckle connection. Way. Preferably, a first seal 23 is provided at the connection between the separator inlet 13 and the intake pipe 21 to ensure a sealed connection between the intake assembly 20 and the separator 10 .

In a preferred embodiment, the inlet pipe 21 is arranged such that the axis of the inlet pipe 21 forms an angle of less than 90 degrees with the tangential direction of the inner wall of the chamber at the separator inlet 13, and may even have an angle with the tangential direction. consistent. As a result, gas can flow tangentially or tend to tangentially into the chamber. The tangential or tending to tangential airflow will form a vortex in the chamber of the separator 10 to generate centrifugal separation, thereby further improving the gas-liquid separation efficiency of the separator.

Similar to the structure of the intake assembly 20, the main body of the exhaust assembly 30 is an exhaust pipe 31, and one end of the exhaust pipe 31 is connected to the separator outlet 14 of the separator 10, such as by threaded connection, snap connection, etc. Commonly used connection methods. Preferably, a second seal 33 is provided at the connection between the separator outlet 14 and the exhaust duct 31 to ensure a sealed connection between the exhaust assembly 30 and the separator 10 .

Similarly, a third seal 42 is also provided at the connection between the closure 40 and the separator 10 to form a seal between the closure 40 and the separator 10 .

The gas-liquid separation device 1 of the present invention further includes a motor 15 for controlling the flow of gas flowing through the gas-liquid separation device 1 . Specifically, the motor 15 is installed in the separator outlet 14 of the separator 10 or in the exhaust duct 31 of the exhaust assembly 30 . The operation of the motor 15 can increase or decrease the flow area of the gas flow path, thereby adjusting the flow rate of the gas.

The gas-liquid separation device 1 further includes a controller 50 for controlling the action of the motor 15 to adjust the gas flow in the separator 10 . Of course, it is obvious to those skilled in the art that, as an additional or an alternative, the motor 15 can also be operated manually, that is, the gas flow can be adjusted manually.

An intake air humidity sensor 22 is installed in the intake pipe 21 of the air intake assembly 20 , and an exhaust humidity sensor 32 is installed in the exhaust pipe 31 of the exhaust assembly 30 . The intake humidity sensor 22 and the exhaust humidity sensor 32 respectively measure the water content in the gas entering the gas-liquid separation device 1 and the water content in the gas flowing out of the gas-liquid separation device 1, and transmit the measured gas water content data to the controller 50. A predetermined algorithm is stored in the controller 50, and after receiving the gas moisture content measurement data from the intake and exhaust humidity sensors 22, 32, the controller 50 calculates The moisture content of the gas is calculated according to the predetermined algorithm pre-stored in the controller 50, and then an instruction is sent to the motor 15 according to the calculation result to operate the motor 15, thereby adjusting the gas flow.

The specific structure of the present invention has been described above. Those skilled in the art will appreciate that various obvious modifications can be made in the specific structures disclosed above.

For example, the closure 40 can be mounted to the separator 10 by other methods known in the art, such as welding, screwing, etc., and even the closure 40 can be integrally formed with the separator 10 .

FIG. 2 shows that the hollow chamber in the separator 10 is substantially cylindrical, such as cylindrical or the like. Besides, the hollow chamber can be of any other suitable shape. Furthermore, the top chamber 12 shown in FIG. 2 is also optional.

Claims (8)

1. A gas-liquid separation device for aircraft, characterized in that, the gas-liquid separation device comprises a separator, a hollow chamber is formed in the separator, and the separator also includes a separator inlet and a separator The outlet, the separator inlet and the separator outlet are respectively communicated with the hollow chamber, wherein the flow area for gas flow in the hollow chamber is larger than the flow area for gas flow in the separator inlet; Wherein, the hollow chamber includes a main chamber and a top chamber located near the top of the separator, the top chamber is in fluid communication with the main chamber, and the main chamber for gas flow a flow area greater than the flow area for gas flow in the top chamber; The inlet of the separator communicates with the main chamber, the outlet of the separator communicates with the top chamber, and the level of the top chamber is higher than that of the outlet of the separator. 2. The gas-liquid separation device according to claim 1, characterized in that, the horizontal height of the outlet of the separator is higher than the horizontal height of the inlet of the separator. 3. gas-liquid separation device as claimed in claim 1, is characterized in that, described gas-liquid separation device also comprises: an air intake assembly comprising an air intake duct connected at one end to the separator inlet; and an exhaust assembly, the exhaust assembly includes an exhaust pipe, and one end of the exhaust pipe is connected to the outlet of the separator. 4. The gas-liquid separation device according to claim 1, characterized in that, the top of the separator is covered with a closure. 5 . The gas-liquid separation device according to claim 1 , wherein a motor is provided at the outlet of the separator, and the flow area for gas flow in the outlet of the separator can be adjusted by operating the motor. 5 . 6. gas-liquid separation device as claimed in claim 5, is characterized in that, described gas-liquid separation device also comprises: an air intake assembly, the air intake assembly includes an air intake pipe, one end of the air intake pipe is connected to the inlet of the separator, and an intake air humidity sensor is arranged in the air intake pipe; an exhaust assembly, the exhaust assembly includes an exhaust pipeline, one end of the exhaust pipeline is connected to the separator outlet, and an exhaust humidity sensor is arranged in the exhaust pipeline; and A controller configured to receive gas moisture content measurements from the intake humidity sensor and the exhaust humidity sensor and control operation of the motor based on the measurements. 7. The gas-liquid separation device according to claim 3, characterized in that, the inlet pipe is arranged such that the axis of the inlet pipe and the inner wall of the hollow chamber are at the inlet of the separator The tangent direction of the line is at an angle of less than 90 degrees. 8. The gas-liquid separation device according to claim 1, characterized in that, a drain hole is provided at the bottom of the hollow chamber for draining the separated liquid.