阅读说明：本技术 一种基于附壁效应的气液分离装置 (Gas-liquid separation device based on wall attachment effect ) 是由 胡大鹏 于洋 于 2021-09-26 设计创作，主要内容包括：一种基于附壁效应的气液分离装置,属于两相分离技术领域。该分离装置采用扩压段、筒体和出口段依次连接的箱体结构,扩压段的端部连接进气口,出口段的端部连接出气口。扩压段的内部设置多个叶片分布器,筒体的内部设置多个连接筒体顶部和底部的气液分离元件,底部外侧设置储液槽。这种基于附壁效应的气液分离装置结构简单,加工要求和成本较低,安装拆卸简易。该分离装置利用附壁效应,使得气体在附壁的过程中将夹带的小液滴聚集成更大的液滴,大液滴更易被气液分离装置分离,从而能够大大提高其分离效率。而且该分离装置的分离负荷范围广,在各种气速下都具有极高的分离效率,能够作为天然气脱水的预处理装置,进而大大提高天然气脱水性能。(A gas-liquid separation device based on a wall attachment effect belongs to the technical field of two-phase separation. The separating device adopts a box structure in which a diffusion section, a barrel and an outlet section are sequentially connected, the end part of the diffusion section is connected with an air inlet, and the end part of the outlet section is connected with an air outlet. The inside of diffusion section sets up a plurality of blade distributors, and the inside of barrel sets up a plurality of gas-liquid separation components of connecting barrel top and bottom, and the bottom outside sets up the reservoir. The gas-liquid separation device based on the wall attachment effect has the advantages of simple structure, lower processing requirement and cost and simple and easy installation and disassembly. The separating device utilizes the wall attachment effect, so that small liquid drops carried in the process of attaching the wall to gas are gathered into larger liquid drops, and the large liquid drops are more easily separated by the gas-liquid separating device, thereby greatly improving the separating efficiency. The separation device has wide separation load range, has extremely high separation efficiency at various gas speeds, and can be used as a pretreatment device for natural gas dehydration, thereby greatly improving the dehydration performance of the natural gas.)

1. A gas-liquid separation device based on a wall attachment effect adopts a box structure in which a diffusion section (3), a cylinder body (6) and an outlet section (7) are sequentially connected, the end part of the diffusion section (3) is provided with a gas inlet (1), and the end part of the outlet section (7) is provided with a gas outlet (7 a), and is characterized in that the diffusion section (3) adopts a box structure with a conical section, the inner wall of the diffusion section (3) is provided with a plurality of blade distributors (2), the cylinder body (6) is internally provided with a plurality of gas-liquid separation elements (5) for connecting the top and the bottom of the cylinder body (6), the outer side of the bottom is provided with a liquid storage tank (8) communicated with the inner cavity of the cylinder body (6), and the bottom of the liquid storage tank (8) is provided with a liquid outlet (9);

the gas-liquid separation element (5) is fixedly connected with one splitter plate (5 b) at the end part by adopting two diversion arcs (5 a), so that a structure that the two diversion arcs (5 a) are symmetrical by taking the splitter plate (5 b) is formed, the side surface of the splitter plate (5 b) is tangentially connected with the inner arc surface of the diversion arc (5 a), a diversion groove (4) for connecting the top and the bottom of a cylinder body (6) is arranged between the two adjacent splitter plates (5 b), the diversion groove (4) is of a trapezoid groove structure that two ends of a baffle plate (4 b) are respectively provided with a hem (4 a), and the notch of the diversion groove (4) is matched with the diversion direction of the inner arc surface of the diversion arc (5 a);

and a jet orifice (5 c) is formed between one side of the flow dividing plate (5 b) and the folded edge (4 b) of the folded edge groove (4) positioned on the same side.

2. A gas-liquid separation apparatus based on the coanda effect according to claim 1, wherein: the width C of the jet orifice (5C) is 50-150mm, and the vertical distance D between the free ends of the guide arc (5 a) and the folded edge (4 b) is 50-150 mm.

3. A gas-liquid separation apparatus based on the coanda effect according to claim 1, wherein: the flow guide arc (5 a) is of a circular arc or elliptic arc structure with the curvature radius R of 50-150 mm.

4. A gas-liquid separation apparatus based on the coanda effect according to claim 1, wherein: the cylinder body (6) is connected with the diffusion section (3) and the outlet section (7) through flanges (10) respectively.

Technical Field

The invention relates to the technical field of two-phase separation, in particular to a gas-liquid separation method and a gas-liquid separation device.

Background

In the transportation process of natural gas, aqueous vapor in the natural gas can condense, accumulate and form big liquid drop or even form the water film and detain in pipeline or equipment in the transportation process, not only can cause the increase of resistance, forms acid hydrate more easily, aggravates the corruption to downstream pipeline and valve, influences whole natural gas conveying system's safety and life. Therefore, the natural gas needs to be dehydrated and dehumidified before entering the pipe network for transportation. The common methods for dehydrating and dehumidifying natural gas mainly include a solvent absorption method and a cryogenic cooling separation method, and both the methods need to use a gas-liquid separation technology. The conventional gas-liquid separation techniques include a wire mesh coalescence-combined cyclone separation method and a collision separation method. The existing gas-liquid separation technology has certain technical defects of low separation efficiency of small-scale liquid drops, narrow applicable gas velocity and liquid drop fluctuation range, so that higher requirements for development of a gas-liquid separator are provided.

Disclosure of Invention

The invention provides a gas-liquid separation device based on the coanda effect, which utilizes the jet coanda effect to improve the integral separation efficiency of the gas-liquid separation process, can be used as a natural gas medium gas-liquid separation pretreatment device, and can effectively solve the problems of the existing gas-liquid separation technology.

The technical scheme adopted by the invention is as follows: a gas-liquid separation device based on a wall attachment effect adopts a box structure that a diffusion section, a barrel and an outlet section are sequentially connected, the end part of the diffusion section is provided with a gas inlet, the end part of the outlet section is provided with a gas outlet, the diffusion section adopts a box structure with a conical section, the inner wall of the diffusion section is provided with a plurality of blade distributors, the barrel is internally provided with a plurality of gas-liquid separation elements which are connected with the top and the bottom of the barrel, the outer side of the bottom is provided with a liquid storage tank communicated with the inner cavity of the barrel, and the bottom of the liquid storage tank is provided with a liquid discharge port;

the gas-liquid separation element adopts two diversion arcs and a diversion plate which are fixedly connected at the end part to form a structure that the two diversion arcs are symmetrical by the diversion plate, the side surface of the diversion plate is tangentially connected with the inner arc surface of the diversion arc, a diversion groove for connecting the top part and the bottom part of the cylinder body is arranged between two adjacent diversion plates, the diversion groove adopts a trapezoidal groove structure that two ends of a baffle plate are respectively provided with a hem, and the notch of the diversion groove is matched with the diversion direction of the inner arc surface of the diversion arc;

and a jet orifice is formed between one side of the flow distribution plate and the folded edge of the folded groove positioned on the same side.

The width C of the jet orifice is 50-150mm, and the vertical distance D between the guide arc and the free end of the folded edge is 50-150 mm.

The diversion arc is of a circular arc-shaped or elliptic arc-shaped structure with the curvature radius R of 50-150 mm.

The cylinder body is connected with the diffusion section and the outlet section through flanges respectively.

The invention has the beneficial effects that: the utility model provides a gas-liquid separation device based on attaches wall effect, adopts the box structure that diffuser section, barrel and export section connect gradually, and the end connection air inlet of diffuser section, the end connection gas outlet of export section, the diffuser section adopts the box structure of conical section, and the inside of diffuser section sets up a plurality of blade distributors of connecting diffuser section top and bottom, and the inside of barrel sets up a plurality of gas-liquid separation components of connecting barrel top and bottom, and the bottom outside sets up the reservoir. The gas-liquid separation device based on the wall attachment effect has the advantages of simple structure, low processing requirement and cost, difficulty in blocking and scaling and easiness in mounting and dismounting. The separating device utilizes the wall attachment effect, so that small liquid drops carried in the process of attaching the wall to gas are gathered into larger liquid drops, and the large liquid drops are more easily separated by the gas-liquid separating device, thereby greatly improving the separating efficiency of the separating device. The separation device has wide separation load range, has extremely high separation efficiency at various gas speeds, and can be used as a pretreatment device for natural gas dehydration, thereby greatly improving the dehydration performance of the natural gas.

Description of the drawings:

fig. 1 is a front view of a structure of a gas-liquid separation apparatus based on the coanda effect.

Fig. 2 is a sectional view a-a in fig. 1.

Fig. 3 is a left side view of a gas-liquid separation device based on the coanda effect.

Fig. 4 is a right side view of a gas-liquid separation device based on the coanda effect.

Fig. 5 is an enlarged view B of fig. 2.

In the figure: 1. the gas-liquid separation device comprises a gas inlet, 2, a blade distributor, 3, a diffusion section, 4, a flow bending groove, 4a, a folding edge, 4b, a baffle plate, 5, a gas-liquid separation element, 5a, a flow guide arc, 5b, a flow distribution plate, 5c, a jet orifice, 6, a cylinder body, 7, an outlet section, 7a, a gas outlet, 8, a liquid storage tank, 9, a liquid discharge port, 10 and a flange.

Detailed Description

So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings.

Fig. 1 to 4 show a structural view of a gas-liquid separation apparatus based on the coanda effect. In the figure, the gas-liquid separation device based on the coanda effect adopts a box structure that a diffusion section 3, a cylinder 6 and an outlet section 7 are sequentially connected, wherein the end part of the diffusion section 3 is provided with an air inlet 1, and the end part of the outlet section 7 is provided with an air outlet 7 a. The diffusion section 3 adopts a box-shaped structure with a conical section, a plurality of blade distributors 2 are arranged on the inner wall of the diffusion section 3, four gas-liquid separation elements 5 connected with the top and the bottom of the cylinder 6 are arranged in the cylinder 6, a liquid storage tank 8 communicated with the inner cavity of the cylinder 6 is arranged on the outer side of the bottom, and a liquid discharge port 9 is arranged at the bottom of the liquid storage tank 8.

The gas-liquid separation element 5 adopts two flow guide arcs 5a and a flow distribution plate 5b to be fixedly connected at the end part, a structure that the two flow guide arcs 5a are symmetrical by the flow distribution plate 5b is formed, the side surface of the flow distribution plate 5b is in tangential connection with the inner arc surface of the flow guide arc 5a, a baffle groove 4 for connecting the top and the bottom of a cylinder 6 is arranged between the two adjacent flow distribution plates 5b, the baffle groove 4 adopts a trapezoidal groove structure that two ends of the baffle plate 4b are respectively provided with a hem 4a, and the notch of the baffle groove 4 is matched with the flow guide direction of the inner arc surface of the flow guide arc 5 a. An injection port 5c is formed between one side of the flow dividing plate 5b and the folded edge 4b of the folded groove 4 located on the same side. The cylinder 6 is connected with the diffusion section 3 and the outlet section 7 through flanges 10 respectively. The baffling groove 4 and the gas-liquid separation element 5 are welded with the cylinder body, and can also be connected by bolts and the like.

The width C of the injection port 5C is 50mm, and the vertical distance D between the guide arc 5a and the free end of the folded edge 4b is 100 mm. The guide arc 5a is in the shape of a circular arc (as shown in fig. 5) having a radius of curvature R of 100 mm.

The working process of the gas-liquid separation device based on the coanda effect comprises the following steps: a gas-liquid two-phase mixture enters from the gas inlet 1 and passes through the blade distributor 2 welded on the inner wall of the diffusion section 3, and blades of the blade distributor 2 and inlet two-phase airflow are arranged at a certain angle, so that the fluid distribution is more uniform. Subsequently, the fluid enters the cylinder 6, and the gas-liquid mixture enters the gas-liquid separation element 5 through the passage between the baffle groove 4 and the gas-liquid separation element 5, i.e., the injection port 5 c. When the two-phase air flow passes through the jet port 5c, the air flow velocity is raised to form a jet flow. After the jet gas is sprayed into the flow guide arc 5a of the gas-liquid separation element 5, the jet gas flows in an attached wall manner in the inner arc surface of the flow guide arc 5a, liquid drops in the two-phase fluid are gradually trapped by the surface of the inner arc surface of the flow guide arc 5a under the action of the attached wall effect, and the trapped liquid drops flow to the bottom of the cylinder 6 along the wall surface of the gas-liquid separation element 5 under the action of gravity. Finally, the jet gas tangentially impacts the baffle plate 4b of the deflection groove 4 at the terminal of the intrados of the guide arc 5a, flows with the wall attached to the surface of the baffle plate 4b, under the action of the wall attached effect, finer liquid drops in the two-phase fluid are gradually captured by the surface of the baffle plate 4b, and the captured liquid drops flow to the bottom of the cylinder 6 along the surface of the deflection groove 4 under the action of gravity. And the liquid enters a liquid storage tank 8 through a liquid outlet at the bottom of the cylinder 6 to complete gas-liquid two-phase separation. The separated gas enters the outlet section 7 through the cylinder 6.

A jet flow channel needs to be formed between the baffling groove 4 and the gas-liquid separation element 5, and the structure of the baffling groove 4 can be bent by section bars and can also be processed and molded. The width C of the injection port 5C, the curvature radius R of the guide arc 5a and the vertical distance D between the guide arc 5a and the free end of the folded edge 4b are obtained through fluid mechanics calculation. The liquid storage tank 8 and the cylinder 6 can be connected by bolts or welded and are fixedly arranged below the cylinder 6.

The foregoing detailed description of the preferred embodiments of the invention has been presented. The technical solutions available to a person skilled in the art through logical analysis, reasoning or limited experimentation on the basis of the prior art, according to the concepts of the present invention, are intended to be within the scope of protection defined by the claims.