Gas distribution device for tower reactor

Abstract

The invention relates to chemical equipment, in particular to a gas distribution device for a tower reactor. Comprising an air inlet pipe, a bottom plate, an annular air guide plate and a circular truncated cone air 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 tubes, the circular truncated cone gas guide plate is composed of a plurality of concentric conical tubes, and the space between the conical tubes is a gas outlet; and the air inlet pipe is a rectangular pipe, is communicated with the annular air guide plate, and is tangent to the side wall of the circular pipe on the outermost side of the annular air guide plate. And uniform distribution and smooth flow of airflow in the reactor are ensured.

Description

Technical Field

[0001] The invention relates to chemical equipment, in particular to a gas distribution device for a tower reactor. Background Art

[0002] At present, the chemical industry widely uses mass transfer and heat transfer methods between gas-liquid phase and gas-solid phase to recover components and heat in gas phase medium. Equipment includes: packed tower reactor; plate tower reactor; spray tower reactor; bubble tower reactor, etc. The mass transfer efficiency between gas-liquid and gas-solid interfaces in tower reactor is a key factor that directly affects the performance of reactor equipment. In reactor design, the gas introduction method is mainly based on a single gas inlet design. After the gas flow is introduced into the reactor, uneven distribution is a common problem, which will cause gas deviation inside the reactor, that is, the gas flow is biased to one side or certain areas, rather than uniform distribution. This deviation flow then causes uneven and insufficient contact between gas-liquid and gas-solid, which directly affects the mass transfer and heat transfer efficiency in the reactor, reducing the efficiency of the entire reaction process.

[0003] In order to improve the deviation phenomenon of gas flow at the inlet of the equipment, the Chinese patent with the announcement number CN 201930781 U discloses "a gas distributor", and the Chinese patent with the announcement number CN 203886352 U discloses "a gas distribution device for a fiber bundle filter". Both have relatively complex structural designs and large gas operation resistance pressure drop. When the inlet gas flow fluctuates, the operating pressure change gradient is larger, and the uniformity of the gas flow in the tower deteriorates, thereby reducing the working efficiency in the reactor. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a gas distribution device for a tower reactor, which ensures that the gas flow is evenly distributed and flows smoothly inside the reactor.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A gas distribution device for a tower reactor comprises an air inlet pipe, a bottom plate, an annular air guide plate and a truncated cone air guide plate; the bottom plate, the annular air guide plate and the truncated cone air guide plate are connected in sequence; the annular air guide plate is composed of a plurality of concentric circular tubes, the truncated cone air guide plate is composed of a plurality of concentric conical tubes, and the space between the conical tubes is a gas outlet; the air inlet pipe is a rectangular tube, the air inlet pipe is connected to the annular air guide plate, and the air inlet pipe is tangent to the side wall of the outermost circular tube of the annular air guide plate.

[0007] Furthermore, the cross section of the air inlet pipe is rectangular, the height of the rectangle is H, mm; the width of the rectangle is D, mm; the radius of the outermost circular tube of the annular air guide plate is R 1, mm; D≤R 1 .

[0008] Furthermore, except for the innermost and outermost circular tubes of the annular air guide plate, the other circular tubes are all provided with arc-shaped notches; the height of the notches is equal to the height of the rectangle, and the arc length of the notches is equal to 1 / 4 of the circumference of the circular tube.

[0009] Furthermore, the cross-sectional areas of the multiple concentric conical tubes from outside to inside are ZS 1 , ZS 2 , ZS 3 ...ZS n The cross-sectional areas of the multiple concentric tubes from outside to inside are YS 1 , YS 2 , YS 3 ...YS n , ZS 1 :ZS 2 :ZS 3 ...ZS n =YS 1 :YS 2 :YS 3 ...YS n .

[0010] Furthermore, the top ends of the multiple concentric conical tubes have the same height.

[0011] Furthermore, swirl blades are provided in the frustum air guide plate.

[0012] Furthermore, the swirl blades are in two layers, respectively located at the upper part and the lower part of the frustum air guide plate.

[0013] Furthermore, an outlet air guide plate is provided in the truncated cone air guide plate along the diameter direction and in the vertical direction.

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

[0015] 1. The annular air guide plate of the present invention is composed of a plurality of concentric circular tubes, and the truncated cone air guide plate is composed of a plurality of concentric conical tubes. The air inlet pipe is tangent to the side wall of the outermost circular tube of the annular air guide plate. The gas enters the plurality of annular airflow guide compartments surrounded by the annular air guide plate through the air inlet pipe. The airflow after entering the airflow guide compartment forms a plurality of groups of centripetal radial rotating airflows. The rotating airflow continuously rises and enters the truncated cone compartment space surrounded by the truncated cone ring plate. As the airflow height increases, the cross-sectional area of ​​the truncated cone compartment increases continuously, and the gas rotation diameter also increases accordingly. According to the principle of constant rotation distance, the velocity of the rotating airflow gradually decreases, and is evenly discharged from the plurality of annular outlets at the top, thereby achieving uniform distribution of the gas at the reactor inlet.

[0016] The present invention uses a swirl structure design to change the direction of the airflow, and at the same time, with the help of a multi-compartment layout, ensures that the airflow is evenly distributed and flows smoothly inside the reactor. This design is not only compact in structure and has a small pressure drop, but also achieves uniform distribution of gas. In complex working conditions where the gas flow rate fluctuates greatly, the device can still maintain good operating performance, thereby improving the working efficiency and operating stability of the reactor.

[0017] 2. The truncated cone air guide plate of the present invention is provided with swirl blades, and when the airflow passes through the swirl blades, centrifugal rotation motion can be generated, which can effectively adjust the air flow rate and keep the air flow stable and uniform.

[0018] 3. The swirl blades of the present invention are two layers, respectively located at the upper and lower parts of the truncated cone air guide plate, which significantly improves the uniformity of the overall gas flow distribution at the gas outlet, and also significantly improves the uniformity of the air flow velocity distribution at each annular gas outlet.

[0019] 4. Except for the outermost circular tube, all other circular tubes of the annular air guide plate of the present invention are provided with arc-shaped notches; the height of the notches is equal to the height of the rectangle, and the arc length of the notches is equal to 1 / 4 of the circumference of the circular tube, thus ensuring smooth flow of gas.

[0020] 5. ZS of the present invention 1 :ZS 2 :ZS 3 ...ZS n =YS 1 :YS 2 :YS 3 ...YS n . This further ensures uniform distribution of gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the present invention.

[0022] Figure 2 It is a schematic front view of the structure of embodiment 1 of the present invention.

[0023] Figure 3 yes Figure 2 AA section view.

[0024] Figure 4 This is a schematic top view of the structure of Example 1 of the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of Example 2 of the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of Example 3 of the present invention.

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

[0028] Figure 8 This is an airflow effect diagram of Example 2 of the present invention.

[0029] Fig. 9 This is an airflow effect diagram of Example 3 of the present invention.

[0030] Fig.10 This is an airflow effect diagram of Example 4 of the present invention.

[0031] In the figure: 1, air inlet pipe; 2, bottom plate; 3, annular air guide plate; 4, truncated cone ring plate; 5, outlet air guide plate; 6, gas outlet; 7, notch; H, rectangle height; D, rectangle width; R 1 , radius of the first round tube; 31, first round tube; 32, second round tube; 33, third round tube; 34, fourth round tube; 35, fifth round tube; 41, first conical tube; 42, second conical tube; 43- third conical tube; 44, fourth conical tube; ZS 1 , the cross-sectional area between the first conical tube and the second conical tube; ZS 2 , the cross-sectional area between the second conical tube and the third conical tube; ZS 3 , the cross-sectional area between the third conical tube and the fourth conical tube; YS 1 , the cross-sectional area between the first circular tube and the second circular tube; YS 2 , the cross-sectional area between the second and third circular tubes; YS 3 , the cross-sectional area between the third circular tube and the fourth circular tube; 8. swirl blades. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0036] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0038] Embodiment 1:

[0039] like Figure 1-4 As shown, a gas distribution device for a tower reactor includes an air inlet pipe 1, a bottom plate 2, an annular air guide plate 3, a truncated cone air guide plate 4 and an outlet air guide plate 5. The truncated cone air guide plate 4, the annular air guide plate 3 and the bottom plate 2 are sequentially connected from top to bottom, and the air inlet pipe 1 extends tangentially into the lower part of the annular air guide plate 3.

[0040] In this embodiment, the annular air guide plate 3 is composed of five concentric circular tubes with vertical axes, which are respectively 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 and bottom ends 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 ends 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 fixedly connected to the bottom plate 2, and the bottom plate 2 is a horizontally arranged circular plate, and the diameter of the bottom plate is the same as the diameter of the first circular tube.

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

[0042] The second circular tube 32, the third circular tube 33 and the fourth circular tube 34 of the annular air guide plate are all provided with arc-shaped notches 7. The height of the notches is equal to the height H of the rectangle, and the arc length of the notches is equal to 1 / 4 of the circumference of the circular tube, thereby ensuring smooth flow of gas.

[0043] In this embodiment, the truncated cone ring plate 4 is composed of four concentric cone tubes with vertical axes, which are respectively the first cone tube 41, the second cone tube 42, the third cone tube 43 and the fourth cone tube 44 from the outside to the inside. The top and bottom of the first cone tube 41, the second cone tube 42, the third cone tube 43 and the fourth cone tube 44 are flush. The bottom end of the first cone tube 41 is connected to the top of the first circular tube 31, the bottom end of the second cone tube 42 is connected to the top of the second circular tube 32, the bottom end of the third cone tube 43 is connected to the top of the third circular tube 33, and the bottom end of the fourth cone tube 44 is connected to the top of the fourth circular tube 34.

[0044] Between the concentric conical tubes is a gas outlet 6. A gas guide plate 5 is provided in the truncated cone gas guide plate 4 along the diameter direction and vertically. In this embodiment, there are four gas guide plates 5, which are evenly distributed along the circumference of the conical tube. The gas guide plate 5 is located at the upper end of the conical tube, and the top of the gas guide plate 5 is flush with the top of the conical tube.

[0045] In this embodiment, the cross-sectional area ZS between the first conical tube and the second conical tube is 1 : The cross-sectional area ZS between the second conical tube and the third conical tube 2 : The cross-sectional area ZS between the third cone tube and the fourth cone tube 3 = Cross-sectional area between the first and second circular tubes YS 1 : The cross-sectional area between the second and third circular tubes YS 2 : The cross-sectional area between the third and fourth circular tubes YS 3 . Ensures uniform distribution of gas.

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

[0047] The gas enters the multiple annular airflow guide compartments surrounded by the annular air guide plate 3 through the air inlet pipe 1. The airflow after entering the airflow guide compartment forms multiple groups of centripetal radial rotating airflows; the rotating airflow continuously rises and enters the truncated cone compartment space surrounded by the truncated cone ring plate 4. As the airflow height increases, the cross-sectional area of ​​the truncated cone compartment increases continuously, and the gas rotation diameter also increases accordingly. According to the principle of constant rotation distance, the flow rate of the rotating airflow gradually decreases, and is evenly discharged from the multiple annular outlets 6 on the upper part of the device, thereby achieving uniform distribution of the gas at the reactor inlet.

[0048] The invention has a simple and reliable structure, great operational flexibility, low running resistance, and fully utilizes the limited reactor inlet space to achieve rapid and uniform distribution of high-speed airflow, thereby greatly improving the working efficiency of the reactor.

[0049] Embodiment 2:

[0050] In this embodiment, as a preferred embodiment of the present invention, the specific structure is as follows Figure 5 As shown, the following improvement is disclosed on the basis of embodiment 1: a swirl blade 8 is provided in the truncated cone air guide plate 4, and the swirl blade 8 is evenly distributed around the circumference and located at the lower part of the truncated cone air guide plate 4. When the airflow passes through the swirl blade 8, a centrifugal rotation motion can be generated, which can effectively adjust the air flow rate and keep the air flow stable and uniform.

[0051] Embodiment 3:

[0052] In this embodiment, as a preferred embodiment of the present invention, the specific structure is as follows Figure 6 As shown, the following improvement is disclosed on the basis of embodiment 1: a swirl blade 8 is provided in the truncated cone air guide plate 4, and the swirl blade 8 is evenly distributed around the circumference and located at the upper part of the truncated cone air guide plate 4. When the airflow passes through the swirl blade 8, a centrifugal rotation motion can be generated, which can effectively adjust the air flow rate and keep the air flow stable and uniform.

[0053] Embodiment 4:

[0054] In this embodiment, as a preferred embodiment of the present invention, the specific structure is as follows Figure 7 As shown, based on implementation modes 1-3, the following improvements are disclosed: swirl blades 8 are provided in the conical air guide plate 4, and the swirl blades 8 are evenly distributed around the circumference. Two layers of swirl blades 8 are provided, which are located at the upper and lower parts of the conical air guide plate 4 respectively.

[0055] like Figure 8-10 As shown, compared with Examples 2 and 3, the uniformity of the overall gas flow distribution at the gas outlet of Example 4 is significantly improved. At the same time, the uniformity of the gas flow velocity distribution at each annular gas outlet is also significantly improved.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas distribution device for a tower reactor, characterized in that: It includes an air intake pipe, a bottom plate, an annular air guide plate and a frustum air guide plate; The bottom plate, the annular air guide plate and the truncated cone air guide plate are connected in sequence; The annular air guide plate is composed of a plurality of concentric circular tubes, and the truncated cone air guide plate is composed of a plurality of concentric conical tubes, and the space between the conical tubes is the gas outlet; The air inlet pipe is a rectangular pipe, the air inlet pipe is communicated with the annular air guide plate, and the air inlet pipe is tangent to the side wall of the outermost circular pipe of the annular air guide plate.

2. A gas distribution device for a tower reactor according to claim 1, characterized in that: The cross section of the air inlet pipe is a rectangle, the height of the rectangle is H, mm; the width of the rectangle is D, mm; the radius of the outermost circular tube of the annular air guide plate is R1, mm; D≤R1.

3. A gas distribution device for a tower reactor according to claim 2, characterized in that: Except for the innermost and outermost circular tubes of the annular air guide plate, the other circular tubes are all provided with arc-shaped notches; the height of the notches is equal to the height of the rectangle, and the arc length of the notches is equal to 1 / 4 of the circumference of the circular tube.

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

5. A gas distribution device for a tower reactor according to claim 1, characterized in that: The top ends of the multiple concentric conical tubes have the same height.

6. A gas distribution device for a tower reactor according to claim 1, characterized in that: The truncated cone air guide plate is provided with swirl blades.

7. A gas distribution device for a tower reactor according to claim 6, characterized in that: The swirl blades are in two layers, respectively located at the upper part and the lower part of the frustum air guide plate.

8. A gas distribution device for a tower reactor according to claim 1, characterized in that: An outlet air guide plate is arranged in the truncated cone air guide plate along the diameter direction and in the vertical direction.

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