Gas distribution device for a tower reactor

Abstract

The present application relates to chemical equipment, specifically to a gas distribution device for a tower reactor. It comprises a gas inlet pipe, a bottom plate, an annular gas guide plate and a circular cone gas guide plate. The bottom plate, the annular gas guide plate and the circular cone gas guide plate are connected in sequence. The annular gas guide plate is composed of multiple concentric circular pipes, and the circular cone gas guide plate is composed of multiple concentric conical pipes. The space between the conical pipes is a gas outlet. The gas inlet pipe is a rectangular pipe, which is in communication with the annular gas guide plate, and the side wall of the outermost circular pipe of the annular gas guide plate is tangent to the gas inlet pipe. It ensures that the gas flow is uniformly distributed and smoothly flows in the reactor.

Description

TECHNICAL FIELD

[0001] The present application relates to chemical equipment, in particular to a gas distribution device for a tower reactor. BACKGROUND

[0002] At present, the mass transfer and heat transfer method between gas phase-liquid phase, gas phase-solid phase is widely used in chemical industry to recover and process the components and heat in the gas phase medium. The equipment includes: packed tower reactor; plate tower reactor; spray tower reactor; bubble tower reactor, etc. The mass transfer efficiency between gas-liquid, gas-solid interface in the tower reactor is a key factor directly affecting the performance of the reactor equipment. In the reactor design, the gas introduction mode is mainly designed with a single gas inlet. After the gas flow is introduced into the reactor, uneven distribution is a common problem, which can cause the gas flow to deviate to one side or some areas, instead of uniform distribution. This uneven flow causes the contact between gas-liquid, gas-solid to be uneven and insufficient, which directly affects the mass transfer and heat transfer efficiency in the reactor, and reduces the efficiency of the entire reaction process.

[0003] In order to improve the uneven flow phenomenon of the gas flow at the equipment inlet, the Chinese patent with publication number CN 201930781 U discloses a "gas distributor", and the Chinese patent with publication number CN 203886352 U discloses a "gas distribution device of fiber bundle filter", both of which have relatively complex structure design and large gas running resistance pressure drop. When the inlet gas flow fluctuates, the operating pressure change gradient is larger, and at the same time, the gas flow uniformity in the tower is poor, which further reduces the working efficiency in the reactor. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the present application provides a gas distribution device for a tower reactor, which ensures uniform distribution and smooth flow of gas flow in the reactor.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] A gas distribution device for a tower reactor, comprising an inlet pipe, a bottom plate, an annular gas guide plate and a circular cone gas guide plate; the bottom plate, the annular gas guide plate and the circular cone gas guide plate are connected in sequence; the annular gas guide plate is composed of a plurality of concentric circular pipes, and the circular cone gas guide plate is composed of a plurality of concentric circular cone pipes, the space between the circular cone pipes being a gas outlet; the inlet pipe is a rectangular pipe, the inlet pipe being in communication with the annular gas guide plate, and the side wall of the outermost circular pipe of the annular gas guide plate being tangent to the inlet pipe.

[0007] Further, the cross section of the inlet pipe is rectangular, the rectangular height being H, mm; the rectangular width being D, mm; the radius of the outermost circular pipe of the annular gas guide plate being R1, mm; D≤R1.

[0008] Further, the annular air guide plate is provided with circular arc-shaped openings in addition to the innermost and outermost circular tubes; the height of the opening is equal to the height of the rectangle, and the arc length of the opening is equal to 1 / 4 of the circumference of the circular tube.

[0009] Further, the cross-sectional areas between the plurality of concentric circular conical tubes from the outside to the inside are ZS1, ZS2, ZS3,..., ZS n , the cross-sectional areas between the plurality of concentric circular tubes from the outside to the inside are YS1, YS2, YS3,..., YS n , ZS1:ZS2:ZS3,..., ZS n = YS1:YS2:YS3,..., YS n .

[0010] Further, the top ends of the plurality of concentric circular conical tubes are of the same height.

[0011] Further, the circular air guide plate is provided with a cyclone vane.

[0012] Further, the cyclone vane is two layers, which are located in the upper and lower parts of the circular air guide plate.

[0013] Further, the circular air guide plate is provided with a diameter-directional and vertical outlet air guide plate.

[0014] Compared with the prior art, the present application has at least the following technical effects or advantages:

[0015] 1. The annular air guide plate is composed of a plurality of concentric circular tubes, the circular air guide plate is composed of a plurality of concentric circular conical tubes, and the side wall of the outermost circular tube of the annular air guide plate is tangent to the inlet pipe. The gas enters the plurality of annular air flow guide compartments surrounded by the annular air guide plate through the inlet pipe, and the air flow entering the air flow guide compartment forms a plurality of groups of centripetal radial rotating air flows. The rotating air flow continuously rises into the circular table-shaped compartment space surrounded by the circular air guide plate, and as the flow height of the air flow increases, the cross-sectional area of the circular table-shaped compartment increases, and the rotating diameter of the gas also increases accordingly. According to the principle of constant rotating distance, the flow rate of the rotating air flow gradually decreases, and is uniformly discharged from the upper plurality of annular gas outlets, thereby realizing uniform distribution of the gas at the inlet of the reactor.

[0016] The present application uses a cyclone structure design to change the direction of the air flow, and at the same time, with the layout of multiple compartments, it ensures that the air flow realizes uniform distribution and smooth flow in the reactor. This design not only has a compact structure and small pressure drop, but also realizes uniform distribution of the gas, and under the complex working conditions of large fluctuations in gas flow, the device can still maintain good operating performance, thereby improving the working efficiency and stability of the reactor.

[0017] 2、The circular table guide plate of the application is internally provided with cyclone vanes, which can produce centrifugal rotation movement when the airflow passes through the cyclone vanes, and can effectively regulate the air flow rate, so as to keep the air flow stable and uniform.

[0018] 3、The cyclone vanes of the application are two layers, which are respectively located at the upper part and the lower part of the circular table guide plate, so that the overall gas flow distribution of the gas outlet is significantly improved, and the uniformity of the gas flow rate distribution of each annular gas outlet is also obviously improved.

[0019] 4、The annular guide plate of the application is provided with circular arc openings in addition to the outermost circular tube; the height of the opening is equal to the height of the rectangle, and the arc length of the opening is equal to 1 / 4 of the circumference of the circular tube, so as to ensure smooth circulation of the gas.

[0020] 5、The ZS1:ZS2:ZS3……ZS n =YS1:YS2:YS3……YS n of the application, which further ensures uniform distribution of the gas. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the three-dimensional structure of embodiment 1 of the application.

[0022] Figure 2 is a schematic diagram of the structure of embodiment 1 of the application.

[0023] Figure 3 is the A-A sectional view of Figure 2 .

[0024] Figure 4 is a schematic diagram of the structure of embodiment 1 of the application.

[0025] Figure 5 is a schematic diagram of the three-dimensional structure of embodiment 2 of the application.

[0026] Figure 6 is a schematic diagram of the three-dimensional structure of embodiment 3 of the application.

[0027] Figure 7 is a schematic diagram of the three-dimensional structure of embodiment 4 of the application.

[0028] Figure 8 is the airflow effect diagram of embodiment 2 of the application.

[0029] Figure 9 is the airflow effect diagram of embodiment 3 of the application.

[0030] Figure 10 is the airflow effect diagram of embodiment 4 of the application.

[0031] In the figure: 1, air inlet pipe; 2, bottom plate; 3, annular air guide plate; 4, circular table air guide plate; 5, outlet air guide plate; 6, gas outlet; 7, notch; H, rectangular height; D, rectangular width; R1, the radius of the first circular pipe; 31, the first circular pipe; 32, the second circular pipe; 33, the third circular pipe; 34, the fourth circular pipe; 35, the fifth circular pipe; 41, the first conical pipe; 42, the second conical pipe; 43, the third conical pipe; 44, the fourth conical pipe; ZS1, the cross-sectional area between the first conical pipe and the second conical pipe; ZS2, the cross-sectional area between the second conical pipe and the third conical pipe; ZS3, the cross-sectional area between the third conical pipe and the fourth conical pipe; YS1, the cross-sectional area between the first circular pipe and the second circular pipe; YS2, the cross-sectional area between the second circular pipe and the third circular pipe; YS3, the cross-sectional area between the third circular pipe and the fourth circular pipe; 8, the cyclone blade. DETAILED DESCRIPTION

[0032] In the following detailed description of the embodiments of the application, in order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme of the embodiments of the application will be described clearly and completely in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, not all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the application and its application or use. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0033] In the description of the application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0034] In the description of the application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0035] In the description of the present application, it should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, and it should be further understood that the terms "comprise" and / or "include" when used in this specification, indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the Examples are not intended to limit the scope of the application, unless otherwise specifically stated. At the same time, it should be clear that the dimensions of the various parts shown in the drawings are not drawn to scale for ease of description. Techniques, methods, and equipment known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the authorized description where appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of exemplary embodiments can have different values. It should be noted that like reference numerals and letters represent like items in the following drawings, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0037] In addition, it should be noted that the use of the terms "first", "second", and the like, to describe various elements is merely intended to differentiate one element from another, and the above terms have no special meaning unless otherwise stated. Therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0038] Example 1:

[0039] As shown in Figures 1-4 A gas distribution device for a tower reactor includes an inlet pipe 1, a bottom plate 2, an annular gas guide plate 3, a circular table gas guide plate 4, and an outlet gas guide plate 5. The circular table gas guide plate 4, the annular gas guide plate 3, and the bottom plate 2 are connected in order from top to bottom, and the inlet pipe 1 extends tangentially into the lower part of the annular gas guide plate 3.

[0040] In this embodiment, the annular gas guide plate 3 is composed of five axis- vertical concentric circular tubes, which are the first circular tube 31, the second circular tube 32, the third circular tube 33, the fourth circular tube 34, and the fifth circular tube 35 from the outside to the inside. The top end and the bottom end of the first circular tube 31, the second circular tube 32, the third circular tube 33, the fourth circular tube 34, and the fifth circular tube 35 are flush. The bottom end of the first circular tube 31, the second circular tube 32, the third circular tube 33, the fourth circular tube 34, and the fifth circular tube 35 is fixed to the bottom plate 2, and the bottom plate 2 is a circular plate arranged horizontally, with the same diameter as the first circular tube.

[0041] The inlet pipe 1 is a rectangular pipe with a rectangular cross section; the rectangular height H is mm; the rectangular width D is mm; and the rectangular width D is less than the radius R1 of the first circular pipe. The inlet pipe 1 is horizontally arranged and tangentially extends into the lower part of the annular air guide plate 3. One side of the inlet pipe 1 is tangent to the first circular pipe 31, and the other side intersects the first circular pipe 31.

[0042] The second circular pipe 32, the third circular pipe 33, and the fourth circular pipe 34 of the annular air guide plate are each provided with a circular-arc-shaped gap 7. The height of the gap is equal to the rectangular height H, and the arc length of the gap is equal to 1 / 4 of the circumference of the circular pipe. The smooth flow of the gas is ensured.

[0043] In the embodiment, the circular-truncated-cone-shaped air guide plate 4 is composed of four axis-vertical concentric conical pipes, which are the first conical pipe 41, the second conical pipe 42, the third conical pipe 43, and the fourth conical pipe 44 from outside to inside. The top end and the bottom end of the first conical pipe 41, the second conical pipe 42, the third conical pipe 43, and the fourth conical pipe 44 are flush. The bottom end of the first conical pipe 41 is connected to the top end of the first circular pipe 31, the bottom end of the second conical pipe 42 is connected to the top end of the second circular pipe 32, the bottom end of the third conical pipe 43 is connected to the top end of the third circular pipe 33, and the bottom end of the fourth conical pipe 44 is connected to the top end of the fourth circular pipe 34.

[0044] The gas outlet 6 is between the concentric conical pipes. The circular-truncated-cone-shaped air guide plate 4 is provided with the outlet air guide plate 5 which is vertically arranged along the diameter direction. In the embodiment, the outlet air guide plate 5 is four, which are uniformly distributed along the circumferential direction of the conical pipe. The outlet air guide plate 5 is located at the upper end of the conical pipe, and the top end of the outlet air guide plate 5 is flush with the top end of the conical pipe.

[0045] In the embodiment, the cross-sectional area ZS1 between the first conical pipe and the second conical pipe: the cross-sectional area ZS2 between the second conical pipe and the third conical pipe: the cross-sectional area ZS3 between the third conical pipe and the fourth conical pipe = the cross-sectional area YS1 between the first circular pipe and the second circular pipe: the cross-sectional area YS2 between the second circular pipe and the third circular pipe: the cross-sectional area YS3 between the third circular pipe and the fourth circular pipe. The uniform distribution of the gas is ensured.

[0046] The working principle and working process of the present application are as follows:

[0047] The gas enters the multiple annular air flow guide compartments surrounded by the annular air guide plate 3 through the inlet pipe 1. After entering the air flow guide compartment, the gas flow forms multiple groups of centripetal radial rotating gas flows. The rotating gas flow continuously rises into the circular-truncated-cone-shaped compartment space surrounded by the circular-truncated-cone-shaped air guide plate 4. With the increase of the flow height of the gas flow, the cross-sectional area of the circular-truncated-cone-shaped compartment continuously increases, and the rotating diameter of the gas also correspondingly increases. According to the principle of constant rotating distance, the flow speed of the rotating gas flow gradually decreases, and the gas is uniformly discharged from the multiple annular gas outlets 6 at the upper part of the device, so that the uniform distribution of the gas at the inlet of the reactor is realized.

[0048] The present application has simple structure, reliable operation, large operation flexibility, small running resistance, full use of limited reactor inlet space, realization of rapid and uniform distribution of high-speed airflow, and thus greatly improved working efficiency of the reactor.

[0049] Example 2:

[0050] In the embodiment as a preferred embodiment of the present application, the specific structure is shown in Figure 5 The improvement is that the cyclone vane 8 is arranged in the circular table air guide plate 4, and the cyclone vane 8 is arranged in the upper part of the circular table air guide plate 4. When the airflow passes through the cyclone vane 8, centrifugal rotation movement can be generated, and the airflow speed can be effectively adjusted to keep the airflow stable and uniform.

[0051] Example 3:

[0052] In the embodiment as a preferred embodiment of the present application, the specific structure is shown in Figure 6 The improvement is that the cyclone vane 8 is arranged in the circular table air guide plate 4, and the cyclone vane 8 is arranged in the upper part of the circular table air guide plate 4. When the airflow passes through the cyclone vane 8, centrifugal rotation movement can be generated, and the airflow speed can be effectively adjusted to keep the airflow stable and uniform.

[0053] Example 4:

[0054] In the embodiment as a preferred embodiment of the present application, the specific structure is shown in Figure 7 The improvement is that the cyclone vane 8 is arranged in the circular table air guide plate 4, and the cyclone vane 8 is arranged in the upper part of the circular table air guide plate 4. When the airflow passes through the cyclone vane 8, centrifugal rotation movement can be generated, and the airflow speed can be effectively adjusted to keep the airflow stable and uniform.

[0055] As shown in Figures 8-10 Compared with examples 2 and 3, the overall airflow distribution uniformity of the gas outlet of example 4 is significantly improved. At the same time, the airflow speed distribution uniformity of each annular gas outlet is also obviously improved.

[0056] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacement or change according to the technical solution and inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A gas distribution device for a tower reactor, characterized in that: it comprises a gas inlet pipe, a bottom plate, an annular gas guide plate and a circular truncated cone gas guide plate, the bottom plate, the annular gas guide plate and the circular truncated cone gas guide plate are connected in sequence; the annular gas guide plate is composed of a plurality of concentric circular pipes, and from outside to inside, it is respectively a first circular pipe, a second circular pipe, a third circular pipe,..., and an (n+1)th circular pipe; the circular truncated cone gas guide plate is composed of a plurality of concentric circular cone pipes, and from outside to inside, it is respectively a first circular cone pipe, a second circular cone pipe, a third circular cone pipe,..., and an nth circular cone pipe, the space between the circular cone pipes is a gas outlet; the bottom end of the first circular cone pipe is connected to the top end of the first circular pipe, the bottom end of the second circular cone pipe is connected to the top end of the second circular pipe, the bottom end of the third circular cone pipe is connected to the top end of the third circular pipe,..., and the bottom end of the nth circular cone pipe is connected to the top end of the nth circular pipe; the gas inlet pipe is a rectangular pipe with a rectangular cross section; the rectangular height H is mm; the rectangular width D is mm; and the rectangular width D is less than the radius R1 of the first circular pipe, mm; the gas inlet pipe is horizontally arranged and tangentially extends into the lower part of the annular gas guide plate, one side of the gas inlet pipe is tangent to the first circular pipe, and the other side of the gas inlet pipe intersects the first circular pipe; the second circular pipe, the third circular pipe,..., and the nth circular pipe of the annular gas guide plate are each provided with a circular-arc-shaped opening, the height of the opening is equal to the rectangular height H, and the arc length of the opening is equal to 1 / 4 of the circumference of the circular pipe; the gas enters a plurality of annular gas flow guiding compartments surrounded by the annular gas guide plate through the gas inlet pipe, the gas flow entering the gas flow guiding compartments forms a plurality of groups of centripetal radial rotating gas flows; the rotating gas flows continuously rise into the circular truncated cone compartment space surrounded by the circular truncated cone ring plate, as the flow height of the gas flow increases, the cross-sectional area of the circular truncated cone compartment increases, and the rotating diameter of the gas also increases accordingly; according to the principle of constant rotating distance, the flow velocity of the rotating gas flow gradually decreases, and the gas is uniformly discharged from a plurality of annular gas outlets at the upper part, thereby achieving uniform distribution of the inlet gas of the reactor.

2. The gas distribution device for a tower reactor according to claim 1, characterized in that: The cross-sectional areas between the plurality of concentric conical tubes from outside to inside are ZS1, ZS2, ZS3, … ZS n , the cross-sectional areas between the plurality of concentric circular tubes from outside to inside are YS1, YS2, YS3, … YS n , ZS1:ZS2:ZS3, … ZS n = YS1:YS2:YS3, … YS n .

3. The gas distribution device for a tower reactor according to claim 1, characterized in that: the top ends of the plurality of concentric circular cone pipes have the same height.

4. The gas distribution device for a tower reactor according to claim 1, characterized in that: the circular truncated cone gas guide plate is provided with a cyclone vane.

5. The gas distribution device for a tower reactor according to claim 4, characterized in that: the cyclone vane is two layers, which are respectively located at the upper part and the lower part of the circular truncated cone gas guide plate.

6. The gas distribution device for a tower reactor according to claim 1, characterized in that: the circular truncated cone gas guide plate is provided with a diameter-directional and vertical outlet gas guide plate.

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