CN111921320A

CN111921320A - Gas-liquid separator and acid gas mist catcher

Info

Publication number: CN111921320A
Application number: CN202010775262.0A
Authority: CN
Inventors: 杨涛; 包锋; 杨志军; 王道元; 李士军; 梁永雄; 李超文; 陈雪光; 岑水玉; 徐欢
Original assignee: SGIS Songshan Co Ltd
Current assignee: SGIS Songshan Co Ltd
Priority date: 2020-08-04
Filing date: 2020-08-04
Publication date: 2020-11-13
Anticipated expiration: 2040-08-04
Also published as: CN111921320B

Abstract

The application relates to the field of machinery, in particular to a gas-liquid separator and an acid gas mist catcher. The gas-liquid separator includes: the device comprises a shell, a valve body and a valve body, wherein the shell is provided with an inner cavity, and an inlet and an outlet which are communicated with the inner cavity; the mist catching layer is arranged in the shell and divides the inner cavity into an upstream cavity and a downstream cavity; the upstream chamber is in communication with the inlet and the downstream chamber is in communication with the outlet; a baffle located in the upstream chamber; the baffle part is connected with the shell, so that a channel is formed between the baffle and the shell while the baffle is connected with the shell; and the confluence piece is positioned in the upstream cavity, and one end of the confluence piece is abutted to one surface of the mist-catching layer positioned in the upstream cavity. The gas-liquid separator can increase the efficiency of gas-liquid separation through the cooperation of the baffle, the confluence piece and the mist catching layer.

Description

Gas-liquid separator and acid gas mist catcher

Technical Field

The application relates to the field of machinery, in particular to a gas-liquid separator and an acid gas mist catcher.

Background

In a vacuum potassium carbonate desulfurization system, the desulfurization solution is contacted with coke oven gas in a desulfurization tower to absorb H in the gas₂S, HCN, and the like, and then heating the acid gas by a regeneration tower; the liquid is discharged from the top of the regeneration tower under the action of a vacuum pump, is subjected to condensation cooling and gas-liquid separation, and is pressurized and sent to an acid making system by the vacuum pump. The desulfurization liquid can absorb oil impurities in the coal gas in the process of washing the coke oven gas, the oil impurities and the acid gas are heated, analyzed and enriched in the acid gas through the regeneration tower, and the oil impurities and the acid gas can react in a pipeline to generate organic salt impurities after being pressurized by the vacuum pump, so that the pipeline is blocked, the conveying resistance of the acid gas is increased, and the operation of the vacuum pump and the analysis of desulfurization are influenced.

Based on this, the present application provides a gas-liquid separator for separating a gas phase from a liquid phase.

Disclosure of Invention

The embodiment of the application aims to provide a gas-liquid separator and an acid gas mist catcher. Which aims to improve the separation efficiency of gas-liquid separation.

The present application provides in a first aspect a gas-liquid separator comprising:

the device comprises a shell, a valve body and a valve body, wherein the shell is provided with an inner cavity, and an inlet and an outlet which are communicated with the inner cavity;

the mist catching layer is arranged in the shell and divides the inner cavity into an upstream cavity and a downstream cavity; the upstream chamber is in communication with the inlet and the downstream chamber is in communication with the outlet;

a baffle located in the upstream chamber; the baffle part is connected with the shell, so that a channel is formed between the baffle and the shell while the baffle is connected with the shell; and

and the confluence piece is positioned in the upstream cavity, and one end of the confluence piece is connected with one surface of the mist-catching layer positioned in the upstream cavity.

In some embodiments of the first aspect of the present application, the position at which the baffle is connected to the housing is at an edge of the inlet.

In some embodiments of the first aspect of the present application, the baffle is a solid helical structure.

In some embodiments of the first aspect of the present application, the spiral face of the baffle extends spirally in a direction in which the inlet is directed toward the center of the mist trap layer.

In some embodiments of the first aspect of the present application, the bus bar is tubular, and a surface of the bus bar is provided with a plurality of through holes penetrating through the bus bar, the plurality of through holes being arranged at intervals along a length direction of the bus bar.

In some embodiments of the first aspect of the present application, the mist trap layer comprises a first web layer and a second web layer disposed in an overlapping arrangement, the second web layer having smaller pore sizes than the first web layer, the first web layer disposed facing the upstream chamber.

In some embodiments of the first aspect of the present application, the mist layer further comprises a third web layer disposed on a side of the second web layer remote from the first web layer; the hardness of the first net layer and the hardness of the second net layer are both larger than that of the second net layer.

In some embodiments of the first aspect of the present application, the material of the first mesh layer is stainless steel; the material of the second net layer is polytetrafluoroethylene.

In some embodiments of the first aspect of the present application, the housing is further provided with a liquid drain port, the liquid drain port communicating with the upstream chamber.

A second aspect of the present application provides an acid gas mist trap comprising an inlet pipe, an outlet pipe and the gas-liquid separator of the first aspect;

the inlet pipe communicates with the inlet port and the outlet pipe communicates with the outlet port.

The gas-liquid separator and the acid gas mist catcher provided by the embodiment of the application have at least the following beneficial effects:

after the gas-liquid mixture enters the upstream cavity through the inlet, liquid drops with larger particle sizes are attached to the baffle plate, then the liquid drops are further subjected to gas-liquid separation through the mist catching layer, and the gas enters the downstream cavity. Liquid stays in the mist catching layer and the upstream cavity, one end of the confluence piece is connected with the mist catching layer, and liquid drops on the mist catching layer are converged on the confluence piece and then drop to the bottom of the upstream cavity; new attachment points are continuously formed on the mist catching layer for catching liquid drops. The gas-liquid separator can increase the efficiency of gas-liquid separation through the cooperation of the baffle, the confluence piece and the mist catching layer.

For the embodiment that the baffle has the spiral surface, the spiral surface has a larger area, so that the contact area of the baffle and the gas-liquid mixture can be increased; the helicoid has better guiding effect, and after the gas-liquid mixture contacts the helicoid, the gas-liquid mixture swirls along the surface of the helicoid, so that a certain centrifugal effect is achieved, and liquid drops can be separated from gas.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 shows a schematic structural diagram of a gas-liquid separator provided in an embodiment of the present application.

Fig. 2 shows an internal structural schematic diagram of a gas-liquid separator provided in an embodiment of the present application.

Fig. 3 shows a schematic structural diagram of a mist-catching layer provided in an embodiment of the present application.

Fig. 4 shows a partial schematic view of a mist trap layer provided in embodiments of the present application.

Fig. 5 shows a schematic structural diagram of a baffle provided in an embodiment of the present application.

Fig. 6 shows a schematic structural diagram of a bus bar provided in an embodiment of the present application.

Icon: 100-a gas-liquid separator; 110-a housing; 111-an inlet; 112-an outlet; 113-an upstream chamber; 114-a downstream chamber; 115-a cleaning port; 116-manhole; 117-drain port; 120-mist catching layer; 121-a first web layer; 122-a second web layer; 123-a third web layer; 130-a baffle; 140-a bus bar.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", and the like refer to orientations or positional relationships that are based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when products of the application are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of description and simplification of the description, but do not refer to or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be considered as limiting the application.

Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Fig. 1 shows a schematic structural diagram of a gas-liquid separator 100 provided in an embodiment of the present application, fig. 2 shows a schematic structural diagram of an internal structure of the gas-liquid separator 100 provided in the embodiment of the present application, and referring to fig. 1 and fig. 2 together, the embodiment provides a gas-liquid separator 100 that can be used for separating a gas-liquid mixture, for example, acidic gas and oil droplets in a vacuum potassium carbonate desulfurization system. It is to be understood that the present application is not limited to the use of the gas-liquid separator 100, for example, in other embodiments of the present application, the gas-liquid separator 100 may be used to separate water from air; or air and oil phase mixtures, etc.

In the present application, the gas-liquid separator 100 includes a housing 110, a mist trap layer 120, a baffle 130, and a confluence member 140.

The shell 110 has an inner cavity therein, and the mist trapping layer 120, the baffle 130 and the confluence piece 140 are all disposed in the inner cavity of the shell 110. The housing 110 is provided with an inlet 111 and an outlet 112, and both the inlet 111 and the outlet 112 communicate with the inner cavity. The gas-liquid mixture enters the inner cavity through the inlet 111, liquid in the gas-liquid mixture is separated from gas under the action of the mist-catching layer 120, the baffle 130 and the confluence piece 140, and gas containing almost no liquid is discharged from the outlet 112.

Further, the mist-catching layer 120 is connected to the housing 110, and the inner cavity is divided into two independent cavities, namely the upstream cavity 113 and the downstream cavity 114, by the mist-catching layer 120.

The upstream chamber 113 is communicated with the inlet 111, the downstream chamber 114 is communicated with the outlet 112, the gas-liquid mixture enters the upstream chamber 113 through the inlet 111, and after gas-liquid separation, the gas enters the downstream chamber 114 and then is discharged through the outlet 112.

Gas can pass through the mist trap layer 120 and the liquid can be trapped and retained within the mist trap layer 120 or within the upstream chamber 113.

The baffle 130 is connected with the shell 110, the baffle 130 is positioned in the upstream cavity 113, the baffle 130 does not seal the upstream cavity 113, only part of the baffle 130 is connected with the shell 110, and a passage is arranged between the part of the baffle 130 which is not connected with the shell 110 and the shell 110. In this embodiment, one end of the baffle 130 is connected to the casing 110, a gap is formed between one end of the baffle 130, which is away from the casing 110, and gaps are also formed between two sides of the baffle 130 and the casing 110, so that a flow channel for passing the gas-liquid mixture is formed between the baffle 130 and the casing 110.

The confluence piece 140 is located in the upstream cavity 113, one end of the confluence piece 140 is abutted to one surface, located in the upstream cavity 113, of the mist-catching layer 120, and the confluence piece 140 has a flow guiding function, so that liquid collected by the mist-catching layer 120 can rapidly leave the mist-catching layer 120 and can be gathered on the confluence piece 140, and the gas-liquid separation efficiency of the mist-catching layer 120 is improved.

Fig. 3 shows a schematic structural diagram of the mist trap layer 120 provided in the embodiment of the present application, and fig. 4 shows a partial schematic diagram of the mist trap layer 120 provided in the embodiment of the present application.

Referring to fig. 3 and 4, in the present embodiment, the mist-catching layer 120 includes three mesh layers, which are a first mesh layer 121, a second mesh layer 122, and a third mesh layer 123, and the first mesh layer 121, the second mesh layer 122, and the third mesh layer 123 are sequentially stacked.

Fig. 4 shows a schematic diagram before the three mesh layers are not installed, and referring to fig. 4, in this embodiment, the materials of the first mesh layer 121 and the third mesh layer 123 are both stainless steel, and the material of the second mesh layer 122 is polytetrafluoroethylene.

The mesh number of the first mesh layer 121 and the third mesh layer 123 is about 400 meshes, the mesh number of the second mesh layer 122 is about 800 meshes, the first mesh layer 121 and the third mesh layer 123 primarily capture liquid drops, liquid with larger liquid drop particle size is separated from gas, and the second mesh layer 122 further captures the liquid drops, so that the separation efficiency is improved. The first mesh layer 121 and the third mesh layer 123 are made of stainless steel. The hardness of the second mesh layer 122 is higher than that of the first mesh layer, so that the strength of the mist-catching layer 120 can be improved, and deformation can be avoided. The polytetrafluoroethylene and stainless steel mesh layers have better acid corrosion resistance.

It should be noted that, in other embodiments of the present application, the aperture sizes of the first network layer 121, the second network layer 122 and the third network layer 123 may be set to be other, for example, the first network layer 121 and the third network layer 123 may be 400-900 mesh, and the second network layer 122 may be 700-900 mesh. Accordingly, in other embodiments, the mist catching layer 120 may also include only two mesh layers, the first mesh layer 121 and the second mesh layer 122, or the mist catching layer 120 may also include three, four or more mesh layers. The material of each mesh layer can be other materials, and is not limited to stainless steel and polytetrafluoroethylene. For example, it may be other hard materials or plastics, etc.

Referring to fig. 3 again, in the present embodiment, the mist capturing layer 120 is circular, a cross-shaped bracket is disposed inside the mist capturing layer 120, and an intersection point of the cross-shaped bracket penetrates through a center of the circle. In other embodiments, the mist layer 120 may be configured as a bracket with other shapes, not limited to a cross-shaped bracket. The support is beneficial to improving the strength of the mist-catching layer 120, and the support is also beneficial to collecting the liquid in the mist-catching layer 120 and then collecting the liquid through the collecting piece 140, so that the gas-liquid separation efficiency of the mist-catching layer 120 is improved. It will be appreciated that in other embodiments no bracket may be provided.

In some embodiments, the housing 110 is provided with the cleaning opening 115, the cleaning opening 115 corresponds to the mist-catching layer 120, so that the cleaning liquid in the cleaning opening 115 can flush the mist-catching layer 120, and when the resistance of the higher concentration acid or gas attached to the mist-catching layer 120 through the mist-catching layer 120 is increased, the cleaning liquid is added through the cleaning opening 115 for cleaning, thereby avoiding the increase of maintenance cost caused by the disassembly of the mist-catching layer 120.

Further, the housing 110 is provided with a manhole 116, and the manhole 116 is used for maintenance.

In the present embodiment, the housing 110 is further provided with a liquid discharge port 117, and the liquid discharge port 117 communicates with the upstream chamber 113. For example, in the present embodiment, the liquid discharge port 117 communicates with the bottom of the upstream chamber 113. Allowing the liquid in upstream chamber 113 to flow by gravity to drain 117.

Fig. 5 shows a schematic structural diagram of a baffle 130 provided in an embodiment of the present application, please refer to fig. 5, in which the baffle 130 is connected to the housing 110, the baffle 130 is located in the upstream cavity 113, the baffle 130 does not completely close the upstream cavity 113, and a flow passage for allowing a gas-liquid mixture to pass through is formed between an end of the baffle 130 not connected to the housing 110 and the housing 110.

The baffle 130 may contact the gas-liquid mixture located within the upstream chamber 113 to cause the liquid to adhere to the baffle 130 for initial separation.

In this embodiment, the position where the baffle 130 is connected to the casing 110 is located at the edge of the inlet 111, i.e., the gas-liquid mixture entering the upstream chamber 113 from the inlet 111 will soon contact the baffle 130 to be separated. Further, the position where the baffle 130 is connected to the case 110 is located at the upper edge of the inlet 111. The baffle 130 is located at the upper edge of the inlet 111 and the gas-liquid mixture entering the upstream chamber 113 flows upwardly into contact with the baffle 130.

In addition, the baffle 130 also has a guiding function, so that the gas-liquid mixture entering from the inlet 111 flows along the surface of the baffle 130 to the free end of the baffle 130.

Further, in the embodiment of the present application, the baffle 130 is a three-dimensional spiral structure having a spiral surface, and the spiral surface of the baffle 130 has a good guiding effect to make the gas-liquid mixture flow along the surface of the baffle 130; after the gas-liquid mixture contacts the spiral surface, the gas-liquid mixture swirls along the surface of the spiral surface, so that a certain centrifugal effect is achieved, and larger liquid drops can be separated from gas. In addition, the helicoid has a large area, which can increase the contact area of the baffle 130 with the gas-liquid mixture.

In this embodiment, the baffle 130 extends in a direction towards the center of the mist trap layer 120, and the angle between the baffle 130 and the air intake direction of the inlet 111 is approximately 40-60 °, for example, 40 °, 45 °, 50 °, and so on. The baffle 130 directs the gas-liquid mixture to the center of the mist trap 120 to enable the gas-liquid mixture to flow rapidly to the mist trap 120. Further, the baffle 130 has an inclination angle, and when the gas-liquid separator 100 is installed in the orientation shown in fig. 1, the liquid caught on the baffle 130 can flow along the surface of the baffle 130 to the bottom of the upstream chamber 113.

It should be noted that, in the embodiment of the present application, the position where the baffle 130 is connected to the casing 110 may not only be limited to the edge of the inlet 111, for example, a certain position may be provided with the inlet 111, but also not limited to the upper side of the inlet 111, the gas-liquid mixture may fill the entire upstream chamber 113 after entering the upstream chamber 113, and the baffle 130 may be disposed at other positions so that the gas-liquid mixture contacts the baffle 130, and liquid droplets adhere to the surface of the baffle 130.

The extension direction of the baffle 130 is not limited to the center of the mist trap layer 120, and the extension direction of the baffle 130 toward the center of the mist trap layer 120 can make the gas-liquid mixture quickly contact with the mist trap layer 120. For embodiments in which the extending direction of the baffle 130 is not directed to the center of the mist trap layer 120, the gas-liquid mixture will also flow upward to contact the mist trap layer 120 after contacting the baffle 130, so as to further achieve the purpose of gas-liquid separation.

Further, the shape and structure of the baffle 130 are not limited to the shape shown in fig. 5, for example, the surface of the baffle 130 may not be a spiral surface, and may be a flat surface, a curved surface, or the like.

Fig. 6 is a schematic structural diagram of a bus bar 140 according to an embodiment of the present application, please refer to fig. 6, in which one end of the bus bar 140 is connected to the surface of the mist trap layer 120 located in the upstream cavity 113, the other end of the bus bar 140 is a free end, and the entire bus bar 140 is located in the upstream cavity 113.

The confluence member 140 has a confluence function, such that the liquid droplets caught on the mist-catching layer 120 are converged on the confluence member 140 and then flow into the bottom of the upstream chamber 113. The confluence member 140 continuously gathers the droplets of the mist trap layer 120, so that the mist trap layer 120 continuously has attachment points to which the droplets are attached. The effect of the mist trap layer 120 is prevented from being reduced after saturation.

In the present embodiment, the bus bar 140 has a tubular structure, and the bus bar 140 is provided with a plurality of through holes penetrating the bus bar 140, the plurality of through holes being arranged at intervals along a length direction of the bus bar 140. For example, in the present embodiment, the confluence member 140 is provided with a plurality of through holes having a diameter of 3mm, which allow the gas-liquid mixture to flow through the through holes to catch liquid droplets entrained in the gas flow.

It should be noted that in other embodiments of the present application, the bus bar 140 may have other shapes, such as a sheet shape, or a hollow tube body or the like may be provided to reduce the weight of the bus bar 140. Accordingly, in some embodiments, the bus bar 140 may not be provided with a through hole.

Further, the number of the bus bar 140 may be one, two, or more. The plurality of bus bars 140 are arranged at intervals.

In the present embodiment, the bus bar 140 is spaced apart from the baffle 130, and the bus bar 140 is not directly connected to the baffle 130. It is understood that in other embodiments of the present application, the bus bar 140 may have contact with the baffle 130.

In this embodiment, the gas-liquid separator 100 may be configured with corresponding valves, inlet and outlet valves, pressure testers, liquid level meters, etc. according to requirements.

The gas-liquid separator 100 provided by the embodiment of the application has the main advantages that:

after the gas-liquid mixture enters the upstream chamber 113 through the inlet 111, the liquid droplets with larger particle sizes are attached to the baffle 130, and then further undergo gas-liquid separation through the mist trap layer 120, and the gas enters the downstream chamber 114. The liquid is remained in the mist catching layer 120 and the upstream cavity 113, one end of the confluence piece 140 is connected with the mist catching layer 120, and the liquid drops on the mist catching layer 120 are converged on the confluence piece 140 and then drop to the bottom of the upstream cavity 113; new attachment points are continuously formed on the mist-catching layer 120 for catching liquid droplets.

The gas-liquid separator 100 can increase the efficiency of gas-liquid separation by the cooperation of the baffle 130, the confluence member 140, and the mist trap layer 120.

Further, for the embodiment where the baffle 130 is a three-dimensional spiral structure, the baffle 130 has a spiral surface, and the spiral surface of the baffle 130 has a better guiding effect to make the gas-liquid mixture flow along the surface of the baffle 130; the spiral surface has a larger area, so that the contact area of the baffle 130 and the gas-liquid mixture can be increased; after the gas-liquid mixture contacts the spiral surface, the gas-liquid mixture swirls along the surface of the spiral surface, so that a certain centrifugal effect is achieved, and larger liquid drops can be separated from gas.

The present application also provides an acid gas mist trap comprising an inlet pipe, an outlet pipe and the gas-liquid separator 100 of the first aspect; the inlet pipe communicates with the inlet 111 and the outlet pipe communicates with the outlet 112.

Further, in some embodiments, valves are provided on both the outlet and inlet tubes.

It will be appreciated that the acid gas mist trap has all the advantages of the gas-liquid separator 100 described above.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gas-liquid separator, comprising:

2. The gas-liquid separator of claim 1, wherein the baffle is connected to the housing at a location at an edge of the inlet.

3. The gas-liquid separator of claim 1, wherein the baffle is a solid helical structure.

4. The gas-liquid separator of claim 3, wherein the helical surface of the baffle extends helically in a direction in which the inlet is directed toward the center of the mist trap layer.

5. The gas-liquid separator according to claim 1, wherein the confluence member has a tubular shape, and a surface of the confluence member is provided with a plurality of through holes penetrating through the confluence member, the plurality of through holes being arranged at intervals along a length direction of the confluence member.

6. The gas-liquid separator of any one of claims 1-5, wherein the mist trap layer comprises a first mesh layer and a second mesh layer disposed in an overlapping arrangement, the second mesh layer having smaller pore sizes than the first mesh layer, the first mesh layer disposed facing the upstream chamber.

7. The gas-liquid separator of claim 6, wherein the mist trap layer further comprises a third mesh layer disposed on a side of the second mesh layer remote from the first mesh layer; the hardness of the first net layer and the hardness of the second net layer are both larger than that of the second net layer.

8. The gas-liquid separator according to claim 6, wherein a material of the first mesh layer is stainless steel; the material of the second net layer is polytetrafluoroethylene.

9. The gas-liquid separator according to any one of claims 1 to 5, wherein the housing is further provided with a liquid drain port, the liquid drain port communicating with the upstream chamber.

10. An acid gas mist trap, characterized in that the acid gas mist trap comprises an inlet pipe, an outlet pipe and a gas-liquid separator according to any one of claims 1 to 9;