CN107050931B - Gas-liquid multistage separation device for pump inflow gas-containing experiment - Google Patents

Abstract

The invention discloses a gas-liquid multistage separation device for a pump incoming flow gas-containing experiment. The separation device comprises a tank body and a first stage separation part, a second stage separation part and a third stage separation part which are arranged in the tank body, wherein the first stage separation part is arranged in the upper space of an inner cavity of the tank body; the first-stage separation part comprises a spiral pipe, a nozzle and a baffle plate, the second-stage separation part comprises an annular cavity, an inlet baffle plate, a gas-liquid separation plate and an outlet baffle plate, and the third-stage separation part comprises a liquid separation plate and a conical flow guide pipe with a large upper end and a small lower end. The invention has compact structure and high separation efficiency, and can effectively solve the problem of fluid degassing in experiments and engineering.

Description

Gas-liquid multistage separation device for pump-flow gas experiment

technical field

The invention relates to the field of pump experiments and the technical field of chemical machinery, in particular to a gas-liquid multistage separation device for pump-flow gas-containing experiments. In addition to meeting the separation of water-insoluble gases in water, it can also meet the separation of fluid-insoluble gases in other fluids.

Background technique

In enterprises or laboratories, the experimental medium used in the pump test bench is generally water, and it is recycled. It is sucked into the pump by the water storage tank, and then discharged into the water storage tank at the outlet of the pump. The experimental aeration device for incoming air is generally located in the inlet pipe between the pump and the water storage tank. However, to ensure that the percentage of gas phase content at the pump inlet is completely controlled by the gas filling device, it is necessary to ensure that the water in the water storage tank does not contain excess gas due to the gas filling at the inlet.

So we need to degas the aerated water before it flows into the storage tank. The degassing unit is located between the pump and the water storage tank. With the increase in the research heat of gas-liquid two-phase flow, the demand for gas-liquid separation devices has gradually increased. In terms of the gas-liquid mixed fluid dominated by the separation fluid, the commonly used separators are relatively simple. Most of the existing gas-liquid separation devices use only gravity separation, and the speed of the fluid is first reduced before separation. The separation efficiency is not very ideal, and the volume is large, which is not conducive to laboratories with small footprints.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present invention proposes a gas-liquid multi-stage separation device for pump-flow gas-containing experiments. The present invention consists of a three-stage separation device. Using a variety of separation principles, the fluid not only conducts gas-liquid separation when the velocity drops, but also uses the velocity and pressure of the fluid for gas-liquid separation.

The technical scheme of the present invention is:

1. A gas-liquid multi-stage separation device for pump-to-flow gas-containing experiments:

It includes a tank body and a first-stage separation part, a second-stage separation part and a third-stage separation part placed in the tank. The first-stage separation part is placed in the upper space of the tank cavity, and the second-stage separation part is placed in the tank. On the peripheral surface of the wall, the first-stage separation part and the second-stage separation part are connected by water pipes, and the third-stage separation part is placed at the bottom of the tank body. The tank cover of the tank body has a top air outlet, and a wire mesh is installed at the top air outlet Filter; gas-liquid two-phase flows through the first-stage separation part, the second-stage separation part and the third-stage separation part in turn to complete the gas-liquid separation.

The first-stage separation part is mainly composed of a spiral tube, a nozzle and a baffle plate. The spiral tube is a pipeline structure arranged along a plane thread. A plurality of nozzles are arranged at intervals on the spiral tube, and are arranged near each nozzle port. There are baffles.

For each nozzle, the nozzle is connected to the outer wall of the upper part of the spiral tube near the center side, and the nozzle is arranged to extend radially outward of the circular section of the spiral tube where it is located, so that the nozzle and the plane of the spiral tube plane thread are at 45 degrees, and the nozzle and the spiral tube are at 45 degrees. The tangential direction of the spiral tube where it is located is 45 degrees; the baffle is in an inverted L shape, and the inner side of the inverted L shape faces the nozzle.

The first-stage separation part of the present invention combines centrifugal force separation, baffle separation and wire mesh filtration to perform gas-liquid separation by utilizing the velocity and pressure of the fluid. Among them, centrifugal force separation is carried out by a spiral tube, and the opening direction of the nozzle is specially set, which is conducive to the discharge of air bubbles from the nozzle.

The port close to the center side of the spiral pipe is used as an outlet, and the outlet is connected to the inlet of the second-stage separation part through a connecting pipe; the port of the spiral pipe far from the center side is used as an inlet, and the inlet is connected to an external pump water source through a water pipe.

The second-stage separation part is mainly composed of an annular cavity, an inlet baffle, a gas-liquid separation plate, an outlet baffle and an overflow port. There are two inlet baffles installed vertically and parallel between them. The two inlet baffles and the inner and outer walls of the annular cavity together form an inlet cavity with only the upper end open. The inner wall of the annular cavity at the bottom of the inlet cavity has a water tank inlet. There is an outlet baffle between the inner and outer walls on the other side of the annular cavity, and the inner wall of the annular cavity above the outlet baffle is provided with an overflow port; the outlet baffle is respectively connected to the inner part of the annular cavity between the two inlet baffles The space forms two symmetrically arranged arc-shaped cavities, and a gas-liquid separation plate is arranged between the inner and outer walls of each arc-shaped cavity. The gas-liquid separation plate extends from the inlet baffle to the outlet baffle and is inclined downward.

The top of the inner wall of the annular cavity is higher than the top of the inlet baffle, the top of the inlet baffle is higher than the top of the outlet baffle, and the top of the outlet baffle is higher than the overflow port.

The top of the gas-liquid separation plate is located between the top of the inlet baffle and the top of the outlet baffle, and the bottom end of the gas-liquid separation plate is lower than the top of the outlet baffle.

The third-stage separation part is mainly composed of a liquid separation plate and a conical guide tube with a large upper end and a small lower end. The center of the bottom surface of the tank body is provided with a tank outlet conical guide tube. The lower end is fixedly connected to the tank body and communicated with the liquid outlet. , the separator plate is installed horizontally above the upper end of the conical guide tube.

2. The application of a gas-liquid multi-stage separation device for a pump-to-flow gas-containing experiment in the multi-stage separation of gas-liquid two-phase fluid, and the gas in the fluid is insoluble in the liquid.

The beneficial effects of the present invention are:

The invention can not only realize the gas-liquid separation when the fluid velocity is lowered, but also utilize the velocity and pressure of the fluid to perform the gas-liquid separation.

The helical tube of the present invention increases the time of the fluid in the first-stage separation part, making the separation more complete.

The gas-liquid separation device disclosed in the present invention is mainly aimed at liquid (about 90%), and currently there are few gas-liquid separation devices with liquid as the main component, and the present invention supplements the vacancy of such separation devices.

The present invention provides convenience for gas-liquid two-phase research. It is only necessary to add an air-filling device and the device of the present invention to the traditional test bench, so that the traditional test bench can do the research of two-phase flow.

The invention has compact structure and high separation efficiency, and can effectively solve the problem of fluid degassing in experiments and engineering.

Description of drawings

1 is a side half-sectional view of a gas-liquid separation device;

Fig. 2 is the top sectional view one of the gas-liquid separation device;

Fig. 3 is the top sectional view two of gas-liquid separation device;

FIG. 4 is a partial circumferential development view of the annular water tank and the tank body;

Fig. 5 is one of the schematic diagrams of the opening direction of the nozzle.

Figure 6 is the second schematic diagram of the direction of the nozzle opening.

In the figure: top air outlet 1, wire mesh filter 2, tank cover 3, spiral tube 4, nozzle 5, annular water tank 6, inlet baffle 7, gas-liquid separation plate 8, liquid separation plate 9, conical guide plate 10. Baffle 11, overflow port 12, outlet baffle 13, tank body 14, water tank inlet 15, connecting pipe 16, water pipe 17, tank outlet 18.

Detailed ways

The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

As shown in FIG. 1 , the specific implementation of the present invention includes a tank body 14 and a first-stage separation part, a second-stage separation part and a third-stage separation part placed in the tank body 14 , and the first-stage separation part is placed in the tank body 14 In the upper space of the inner cavity, the second-stage separation part is placed on the inner wall surface of the tank body 14; the first-stage separation part and the second-stage separation part are connected by a water pipe 16; The tank cover 3 of the tank body 14 is provided with a top air outlet 1, and a wire mesh filter 2 is installed at the top air outlet 1.

As shown in Figure 2, the first-stage separation part is mainly composed of a spiral tube 4, a nozzle 5 and a baffle 11. The spiral tube 4 is a pipeline structure arranged along a plane thread, and a plurality of nozzles 5 are arranged on the spiral tube 4 at intervals. A baffle 11 is provided near the port of each nozzle 5 .

As shown in FIGS. 5 to 6 , for each nozzle 5, the nozzle 5 is connected to the outer wall of the upper part of the spiral tube 4 near the center side, and the nozzle 5 is arranged along the radially outward extension of the circular section of the spiral tube 4 where it is located, so that The nozzle 5 is 45 degrees to the plane where the plane thread of the spiral tube 4 is located, and the nozzle 5 is 45 degrees to the tangential direction of the spiral tube 4 where it is located;

The port of the spiral pipe 4 close to the center side is used as the outlet, and the outlet is connected to the inlet of the second-stage separation part through the connecting pipe 16; the port of the spiral pipe 4 away from the center side is used as the inlet, and the inlet is connected with the external pump water source through the water pipe 17. .

As shown in Figure 1, Figure 3 and Figure 4, the second-stage separation part is mainly composed of an annular cavity 6, an inlet baffle 7, a gas-liquid separation plate 8, an outlet baffle 13 and an overflow port 12. The inner wall of the tank body 14 The circumference of the column is surrounded by a plate to form an annular cavity 6, and the outer wall of the tank body 14 is used as the outer wall of the annular cavity 6; between the inner and outer walls of the annular cavity 6, two vertical parallel The installed inlet baffle 7, the two inlet baffles 7 and the inner and outer walls of the annular cavity 6 together form an inlet cavity with only the upper end open. The inner wall of the annular cavity 6 at the bottom of the inlet cavity is provided with a water tank inlet 15. The water tank inlet 15 is connected to the outlet of the spiral pipe 4 through the connecting pipe 16;

An outlet baffle 13 is arranged between the inner and outer walls of the other side of the annular cavity 6 , the outlet baffle 13 and the two inlet baffles 7 are arranged symmetrically, and an overflow port is provided on the inner wall of the annular cavity 6 above the outlet baffle 13 12;

The inlet baffle 7 and the outlet baffle 13 prevent the fluid in the box from forming an annular flow. The outlet baffle 13 and the inner space of the annular cavity 6 between the two inlet baffles 7 respectively form two symmetrically arranged arc-shaped cavities. A gas-liquid separation plate 8 is arranged between the inner and outer walls of each arc-shaped cavity, and the gas-liquid separation plate 8 extends from the inlet baffle 7 to the outlet baffle 13 and is arranged obliquely downward.

The top of the inner wall of the annular cavity 6 is higher than the top of the inlet baffle 7 , the top of the inlet baffle 7 is higher than the top of the outlet baffle 13 , and the top of the outlet baffle 13 is higher than the overflow port 12 . The level of the inlet baffle 7 is higher than that of the outlet baffle 13 , so that the fluid can always flow from the inlet to the overflow port 12 , and at the same time, the inlet baffle 7 can decelerate the fluid flowing into the spiral pipe 4 .

The top of the gas-liquid separation plate 8 is between the top of the inlet baffle 7 and the top of the outlet baffle 13 , and the bottom end of the gas-liquid separation plate 8 is lower than the top of the outlet baffle 13 . In specific implementation, the top of the gas-liquid separation plate 8 may be similar to the top of the overflow port 12 to ensure that the water in the water tank basically flows from the underside of the gas-liquid separation plate 8 to the overflow port 12 .

As shown in FIG. 1, the third-stage separation part is mainly composed of a liquid separator 9 and a conical guide tube 10 with a large upper end and a small lower end. A tank outlet 18 is opened in the center of the bottom surface of the tank body 14, and the tank outlet 18 passes through the conical guide pipe. The flow pipe 10 drains out, the lower end of the conical guide pipe 10 is fixedly connected to the tank body 14 and communicates with the liquid outlet, and the liquid separation plate 9 is installed horizontally above the upper end of the conical guide pipe 10 . A liquid collecting space is formed between the bottom surface of the tank body 14 and the conical guide tube 10 . The funnel shape of the conical baffle 10 has a steady flow effect on the discharged fluid.

The multistage separation process of the present invention is:

The gas-liquid two-phase mixed fluid first enters the helical pipe 4, and the helical pipe 4 is provided with uniformly distributed nozzles 5, and the nozzles are provided with baffles 11. The number of nozzles and baffles depends on the situation.

Under the dual action of centrifugal force and gravity, since the liquid phase is heavier than the gas phase, during the movement of the bubbles following the fluid, the liquid phase will deflect to the outer side of the lower part of the spiral tube 4 to flow along the spiral tube 4, and the bubbles will deflect to the upper inner side of the spiral tube 4 to flow along the spiral tube 4 Centrifugal flow, so the nozzles 5 are arranged as shown in Figures 5 and 6. In this way, a part of the gas and water will be sprayed out from the nozzle 5 under the action of the flow rate and pressure, and will be blocked by the baffle plate 11. The gas part will flow upward from the horizontal support plate of the baffle plate 11, and the water will flow along the edge of the baffle plate 11 under the action of gravity. The vertical support plate of the baffle plate 11 flows down into the liquid collecting tank space of the third-stage separation part.

The main flow through the helical pipe 4 enters the second-stage separation part through the pipe. The function of the inlet baffle 7 and the outlet baffle 13 is to divide the annular water tank 6 into two parts, so that the internal flow first enters through the water tank inlet 15 and turns upward. After passing through the top of the inlet baffle 7, it flows into the arc-shaped cavities on both sides, and then flows into the outlet baffle 13 from the arc-shaped cavity, and flows out from the overflow port 12 at the outlet baffle 13 to the third-stage separation part inside the liquid collecting tank space, so as to avoid the formation of annular flow in the annular water tank 6 .

The two inlet baffles 7 form the inlet body space and can also decelerate the fluid flowing from the spiral tube 4 for gravity separation.

When the fluid flows through the gas-liquid separation plate 8 of the arc-shaped cavity, under the action of gravity, the gas rises along the gas-liquid separation plate 8, and the water flows away from below.

The liquid in the liquid collecting tank space flows out from the tank outlet 18 through the conical guide pipe 10, and all the above-mentioned gases are discharged from the top air outlet 1, and the fluid after the two-stage separation is finally completed in the tank body 14 by gravity to complete the final separation. .

Claims (7)

1. the gas-liquid multistage separation device of a pump to flow gas-containing experiment is characterized in that: comprise tank body (14) and be placed in the first-stage separation part, the second-stage separation part and the tank body (14) The third stage separation part, the first stage separation part is placed in the upper space of the inner cavity of the tank body (14), the second stage separation part is placed on the inner wall peripheral surface of the tank body (14), the first stage separation part and the second stage separation part are separated The parts are connected by a connecting pipe (16), the third-stage separation part is placed at the bottom of the tank body (14), and the tank cover (3) of the tank body (14) is provided with a top air outlet (1), and the top air outlet (1) A wire mesh filter (2) is installed at ); the gas-liquid two-phase flows through the first-stage separation part, the second-stage separation part and the third-stage separation part in turn to complete the gas-liquid separation; The first-stage separation part is composed of a spiral tube (4), a nozzle (5) and a baffle plate (11). There are a plurality of nozzles (5), and a baffle (11) is provided near the port of each nozzle (5); for each nozzle (5), the nozzle (5) is connected to the upper part of the spiral pipe (4) near the center The outer wall of the side, the nozzle (5) extends radially outward along the circular section of the spiral tube (4) where it is located, so that the nozzle (5) is 45 degrees from the plane where the plane thread of the spiral tube (4) is located, and the nozzle (5) ) and the tangential direction of the spiral tube (4) where it is located at 45 degrees; the baffle (11) is in an inverted L shape, and the inside of the inverted L shape faces the nozzle (5). 2. a kind of pump according to claim 1 comes to flow the gas-liquid multistage separation device of gas-containing experiment, it is characterized in that: described helical pipe (4) is close to the port of center side as outlet, and outlet is through connecting pipe (4). 16) Connect with the inlet of the second-stage separation part; the port on the side of the spiral pipe (4) away from the center is used as the inlet, and the inlet is connected with the external pump water source through the water pipe (17). 3. The gas-liquid multistage separation device for a pump to flow gas-containing experiment according to claim 1, wherein the second-stage separation part is composed of an annular cavity (6), an inlet baffle (7) ), a gas-liquid separation plate (8), an outlet baffle (13) and an overflow port (12); two vertical and parallel inlet baffles are arranged between the inner and outer walls of one side of the annular cavity (6). (7), the two inlet baffles (7) and the inner and outer walls of the annular cavity (6) together form an inlet cavity with only the upper end open, and the inner wall of the annular cavity (6) at the bottom of the inlet cavity is provided with a water tank inlet ( 15); an outlet baffle (13) is provided between the inner and outer walls on the other side of the annular cavity (6), and an overflow port (12) is provided on the inner wall of the annular cavity (6) above the outlet baffle (13); The outlet baffles (13) respectively form two symmetrically arranged arc-shaped cavities with the inner space of the annular cavity (6) between the two inlet baffles (7). There is a gas-liquid separation plate (8), and the gas-liquid separation plate (8) extends from the inlet baffle (7) to the outlet baffle (13) and is arranged obliquely downward. 4. The gas-liquid multistage separation device for a pump to flow gas-containing experiment according to claim 3, wherein the top of the inner wall of the annular cavity (6) is higher than the top of the inlet baffle (7), The top of the inlet baffle (7) is higher than the top of the outlet baffle (13), and the top of the outlet baffle (13) is higher than the overflow port (12). 5. A kind of pump according to claim 3 to flow the gas-liquid multistage separation device of gas-containing experiment, it is characterized in that: the top of described gas-liquid separation plate (8) is between the top of inlet baffle (7) and Between the top end of the outlet baffle plate (13), the bottom end of the gas-liquid separation plate (8) is lower than the top end of the outlet baffle plate (13). 6. a kind of pump according to claim 1 to flow the gas-liquid multistage separation device of gas-containing experiment, it is characterized in that: described third-stage separation part is made up of liquid separator (9) and upper end is big, lower end is small The bottom surface of the tank body (14) is provided with a tank outlet (18). The lower end of the conical guide pipe (10) is fixedly connected to the tank body (14) and communicated with the liquid outlet. (9) is installed horizontally above the upper end of the conical guide tube (10). 7. The application of any one of claims 1-6, characterized in that: in the application in the multi-stage separation of gas-liquid two-phase fluid, the gas in the fluid is insoluble in the liquid.

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