Air diffusion structure

Abstract

The utility model provides an air diffusion structure and relates to the technical field of fermentation. The air diffusion structure comprises an air inlet pipe, an air distribution pipe and a filter part, wherein the air inlet pipe is used for introducing gas; the air distribution pipe is communicated with the air inlet pipe; the filter part is arranged on the air distribution pipe, and diffusion holes are formed in the filter part; and gas entering from the gas inlet pipe is conveyed to the filtering piece through the air distribution pipe, and is filtered and diffused through the diffusion holes. And the filtering piece plays a role in filtering gas impurities, and the wind resistance is relatively small under the flow guide effect of the filtering piece. By means of the diffusion holes of the filter part, gas can be rapidly diffused out of the filter part, uniform dispersion of the gas is achieved, meanwhile, the gas can be cut into small and dense bubbles, after the gas is jetted into the tank body of the reaction tank, the small bubbles which are evenly diffused can be dispersed into materials in the tank body, the oxygen dissolving level and the contact area are increased, and the oxygen dissolving efficiency is improved. The gas utilization rate and the reaction efficiency are improved.

Description

Technical Field

[0001] The utility model generally relates to the field of fermentation technology, and more specifically, to an air diffusion structure. Background Art

[0002] Long-chain dicarboxylic acid refers to aliphatic dicarboxylic acid with multiple carbon atoms in the carbon chain, including saturated and unsaturated dicarboxylic acids. Long-chain dicarboxylic acid is an important raw material for synthesizing high-grade spices, high-performance engineering plastics, high-temperature electrolytes, high-grade hot-melt adhesives, cold-resistant plasticizers, high-grade lubricating oils, high-grade paints and coatings in the chemical industry, and has important and wide industrial applications.

[0003] At present, in the process of fermenting and producing long-chain dicarboxylic acid, the fermentation reaction kettle needs aerobic stirring and respiration. The air distributor is related to the power energy consumption of fermentation, the consumption of air, the dissolved oxygen condition of fermentation, and even the quality of fermentation indexes.

[0004] Most of the existing air distributors are provided with uniformly distributed and identical air outlet holes on their circular structures. Directly setting the air outlet holes on the air distributor easily causes a relatively low dissolved oxygen level in the fermentation process, uneven bubble dispersion and large bubbles, low oxygen utilization rate, air waste, affects the biological metabolism oxygen supply capacity throughout the fermentation process, and thus causes various energy wastes in the biological fermentation industry. Summary of the Utility Model

[0005] An air diffusion structure provided by the utility model improves the uniformity of gas diffusion, has tiny and dense bubbles, enhances the dissolved oxygen level of fermentation, and maximally achieves the purpose of energy conservation and oxygen utilization rate improvement.

[0006] According to a first aspect of the utility model, an air diffusion structure is provided, comprising:

[0007] An air inlet pipe for introducing gas;

[0008] An air distribution pipe communicated with the air inlet pipe;

[0009] A filter element disposed on the air distribution pipe, the filter element being provided with diffusion holes;

[0010] Wherein, the gas entering from the air inlet pipe is transported to the filter element through the air distribution pipe and is filtered and diffused through the diffusion holes.

[0011] In some embodiments, the number of the diffusion holes is multiple, and the projections of the multiple diffusion holes on a reference plane are arranged along the circumferential direction of the reference plane, and the reference plane is perpendicular to the axial direction of the air distribution pipe.

[0012] In some of the embodiments, the filter element and the air distribution pipe are of a split structure; and / or, the filter element and the air distribution pipe are connected by welding or a connecting member.

[0013] In some of the embodiments, the filter element is of an arc structure, the outer diameter of the filter element is the same as the outer diameter of the air distribution pipe, and the inner diameter of the filter element is the same as the inner diameter of the air distribution pipe;

[0014] and / or, the wall thickness of the filter element is 0.5 mm to 20 mm;

[0015] and / or, the aperture of the diffusion hole is 1 μm to 1000 μm.

[0016] In some of the embodiments, the air distribution pipe includes a plurality of sub-pipe bodies, and adjacent two of the sub-pipe bodies are connected by the filter element;

[0017] and / or, the number of the filter elements is multiple, the multiple filter elements are arranged at intervals along the axial direction of the air distribution pipe, and adjacent two of the filter elements are connected by the sub-pipe body;

[0018] and / or, the multiple filter elements are respectively arranged on two sides or the same side in the axial direction of the air distribution pipe.

[0019] In some of the embodiments, the central angle of the projection of the filter element on the reference plane is 30° to 360°; wherein, the reference plane is perpendicular to the axial direction of the air distribution pipe.

[0020] In some of the embodiments, the filter element includes a first filter element and a second filter element, and the central angles of the projections of the first filter element and the second filter element on the reference plane are different;

[0021] wherein, the first filter element and the second filter element are arranged on two sides or the same side in the axial direction of the air distribution pipe; and / or, at least one of the first filter elements is arranged between adjacent two of the second filter elements; and / or, at least one of the second filter elements is arranged between adjacent two of the first filter elements.

[0022] In some of the embodiments, at least one of the air distribution pipes and at least one of the filter elements form a linear structure or an arc structure;

[0023] wherein, the arc structure is any one of a semi-ring, a ring, an elliptical ring, and a polygonal ring.

[0024] In some of the embodiments, the diffusion hole includes a first diffusion hole and a second diffusion hole, and the distance between the first diffusion hole and the intake pipe is less than the distance between the second diffusion hole and the intake pipe;

[0025] Among them, the aperture of the first diffusion hole is smaller than that of the second diffusion hole.

[0026] In some embodiments, the filter element is at least one of a filter mesh element, a wire mesh element, a sieve mesh element, a sintered mesh element, a sintered felt element, a powder sintered element, or a membrane filter element.

[0027] One embodiment of the present utility model has the following advantages or beneficial effects:

[0028] The air diffusion structure provided by the embodiment of the present utility model is such that the gas entering from the intake pipe is transported to the filter element through the air distribution pipe. The filter element plays a role in filtering gas impurities, and under the guiding action of the filter element, the wind resistance is relatively small. The externally supplied air is dispersed in specific mesh-shaped air holes, and the air is evenly dispersed under the action of pressure and quickly exits the filter element. While the filter element realizes the uniform dispersion of the gas, it can also cut the gas into smaller and denser bubbles, and the bubbles carry oxygen and diffuse into the fermentation broth. This structure can maximize the utilization and improve the mass transfer and oxygen transfer effects during the fermentation metabolism process, improve the oxygen utilization rate, enhance the dissolved oxygen level in fermentation, and save a large amount of energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] For a better understanding of the present utility model, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present utility model. Additionally, the related elements or components may have different arrangements as known in the art. Moreover, in the drawings, the same reference numerals represent the same or similar components in each drawing. By referring to the accompanying drawings and describing its exemplary embodiments in detail, the above and other features and advantages of the present utility model will become more apparent.

[0030] Among them:

[0031] Figure 1 Shows the structural schematic diagram of the fermentation device of Embodiment 1 of the present utility model;

[0032] Figure 2 Shows the structural schematic of the air diffusion structure of Embodiment 1 of the present utility model Figure 1 ;

[0033] Figure 3 Shows the side view of the air diffusion structure of Embodiment 1 of the present utility model;

[0034] Figure 4 Shows Figure 3 The cross-sectional view at E-E;

[0035] Figure 5 Shows Figure 4Partial enlarged view;

[0036] Figure 6 Fig. shows the structural schematic diagram of the air diffusion structure of the first embodiment of the present utility model; Figure 2 ;

[0037] Figure 7 Fig. shows the side view of the filter element in the air diffusion structure of the first embodiment of the present utility model;

[0038] Figure 8 Fig. shows Figure 7 The cross-sectional view at C-C;

[0039] Figure 9 Fig. shows the side view of the air diffusion structure of the second embodiment of the present utility model;

[0040] Figure 10 Fig. shows Figure 9 The cross-sectional view at A-A;

[0041] Figure 11 Fig. shows the side view of the air diffusion structure of the third embodiment of the present utility model;

[0042] Figure 12 Fig. shows Figure 11 The cross-sectional view at B-B.

[0043] Among them, the description of the reference numerals is as follows:

[0044] 100, air diffusion structure; 200, tank body; 201, cylinder; 202, cover; 300, fixing member; 400, stirring device;

[0045] 1, air distribution pipe; 2, filter element; 3, intake pipe; 4, connecting member;

[0046] 20, diffusion hole; 21, first filter element; 22, second filter element. Detailed implementation manners

[0047] Next, the technical solutions in the exemplary embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the exemplary embodiments of the present utility model. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the protection scope of the present utility model. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present utility model.

[0048] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "a plurality" means two or more; the term "and / or" includes any combination and all combinations of one or more of the associated listed items. In particular, referring to "the / said" object or "an" object also intends to represent one of the possible multiple such objects.

[0049] Unless otherwise specified or stated, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] Furthermore, in the description of the present utility model, it should be understood that the orientation terms such as "upper", "lower", "inner", and "outer" described in the exemplary embodiments of the present utility model are described from the angles shown in the drawings and should not be construed as limiting the exemplary embodiments of the present utility model. It should also be understood that in the context, when referring to an element or feature being connected "above", "below", or "inside", "outside" another element (one or more), it can not only be directly connected "above", "below", or "inside", "outside" another (one or more) element, but also be indirectly connected "above", "below", or "inside", "outside" another (one or more) element through an intermediate element.

[0051] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present utility model will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0052] Embodiment 1

[0053] This embodiment provides a fermentation device, as Figure 1 shown, the fermentation device includes a tank body 200, a stirring device 400, and an air diffusion structure 100. The air diffusion structure 100 is located at the bottom of the tank body 200 along the axial direction of the tank body 200. The stirring device 400 is arranged in the tank body 200 and is correspondingly arranged with the air diffusion structure 100. The air diffusion structure 100 is arranged in the tank body 200 and is communicated with the tank body 200.

[0054] Specifically, when the tank body 200 is in a vertical structure, along the axial direction of the tank body 200, the stirring device 400 is located above the air diffusion structure 100.

[0055] In the fermentation device provided in this embodiment, the air diffusion structure 100 provides the gas required for the reaction for the tank body 200, for example, air, oxygen, etc. The air diffusion structure 100 is located at the bottom of the tank body 200 along the axial direction of the tank body 200. The gas diffused from the air diffusion structure 100 is evenly dispersed in the fermentation broth under the stirring action of the stirring device 400, improving the fermentation dissolved oxygen level.

[0056] Among them, the tank body 200 can also be called a reaction kettle. The tank body 200 is a hollow structure. The accommodation cavity inside the tank body 200 is used to accommodate materials and provide a reaction space for the fermentation of the materials. Among them, the materials can specifically be selected from one or more of alkanes, straight-chain saturated fatty acids, straight-chain saturated fatty acid esters, and straight-chain saturated fatty acid salts, etc.

[0057] Specifically, the tank body 200 includes a cylinder body 201 and a cover 202. The cylinder body 201 is in a cuboid, cylindrical structure, etc. The cover 202 is arranged at the end of the cylinder body 201 along the axial direction of the tank body 200. The cover 202 serves to block the bottom end of the cylinder body 201. At the same time, the air diffusion structure 100 is arranged inside the cover 202 or between the cylinder body 201 and the cover 202, providing an accommodation space for the air diffusion structure 100.

[0058] Among them, the air diffusion structure 100 can be connected to a power station. The power station can provide compressed gas with a pressure above 0.2 MPa. The compressed gas is transported into the fermentation broth in the tank body 200 through the air diffusion structure 100.

[0059] In addition, a control valve is provided in the connecting pipeline between the power station or between the power station and the air diffusion structure 100 to control the opening and closing of the gas. It can be automatically completed according to the set program, avoiding human participation, realizing unmanned automatic control, being able to stably supply gas, continuously supply oxygen evenly, with strong biological metabolism, energy saving, and reduced production costs.

[0060] In one embodiment, as Figure 1 shown, the fermentation device further includes a fixing member 300. The fixing member 300 can specifically be selected as a U-shaped fixing member. The air diffusion structure 100 is fixed inside the tank body 200 through the fixing member 300. While achieving the fixing effect of the air diffusion structure 100, the fixing member 300 also plays a supporting role for the air diffusion structure 100.

[0061] As Figure 1As shown, the stirring device 400 further includes a rotary drive source (not shown in the figure), a stirring shaft, and stirring paddles. The rotary drive source can be a drive motor. The output end of the rotary drive source is connected to the stirring shaft, and the stirring paddles are arranged on the stirring shaft. The stirring shaft and the stirring paddles are arranged inside the tank body 200. The rotary drive source drives the stirring shaft to rotate, thereby driving the stirring paddles to rotate relative to the tank body 200, which is beneficial to uniformly disperse the bubbles diffused from the air diffusion structure 100 in the fermentation liquid, improve the oxygen utilization rate, and save a large amount of energy.

[0062] During the fermentation production process, the microbial metabolism process belongs to deep stirring aerobic fermentation. During fermentation, while sufficient and uniform mixing is required, oxygen also needs to be input for metabolic reactions. By using the air diffusion structure 100, sufficient oxygen can be provided at different stages of microorganisms for the bacteria to absorb and utilize, enhancing the dissolved oxygen level in fermentation. Moreover, the gas phase, liquid phase, solid phase, and oil phase in the material can be uniformly and fully combined with each other in a clustered manner, the bacteria can quickly absorb nutrients, accelerate the metabolic rate, improve the fermentation level, accelerate the material conversion, shorten the reaction time, improve the production efficiency, and save energy.

[0063] This embodiment also provides an air diffusion structure 100, as Figure 1 shown. The air diffusion structure 100 includes an air inlet pipe 3, an air distribution pipe 1, and a filter element 2. The air inlet pipe 3 is used to introduce gas. The air distribution pipe 1 is communicated with the air inlet pipe 3, and the filter element 2 is arranged on the air distribution pipe 1. The filter element 2 is provided with diffusion holes 20 (as Figure 5 shown); among them, the gas entering from the air inlet pipe 3 is transported to the filter element 2 through the air distribution pipe 1 and is filtered and diffused through the diffusion holes 20.

[0064] For the air diffusion structure 100 provided in this embodiment, the gas entering from the air inlet pipe 3 is transported to the filter element 2 through the air distribution pipe 1. The filter element 2 plays a role in filtering gas impurities, and under the guiding action of the filter element 2, the wind resistance is relatively small. By using the diffusion holes 20 of the filter element 2, the gas can quickly disperse out of the filter element 2. While realizing the uniform dispersion of the gas, the gas can also be cut into smaller and denser bubbles. After the gas jets from the filter element 2 into the tank body 200 of the reaction tank, under the stirring action of the stirring device 400, the diffused small bubbles can be uniformly dispersed into the material in the tank body 200, increasing the dissolved oxygen level and the contact area, and improving the gas utilization rate and the reaction efficiency.

[0065] Among them, the filter element 2 is at least one of a filter mesh element, a wire mesh element, a screen mesh element, a sintered mesh element, a sintered felt element, a powder sintered element, or a membrane filter element.

[0066] Exemplarily, the filter mesh element includes a textile fiber filter mesh, a metal filter mesh, an aluminum mesh, a stainless steel mesh, a non-woven fabric, a fiber mesh, an activated carbon filter mesh, etc.

[0067] Exemplarily, the wire mesh element includes natural wire mesh, synthetic wire mesh, metal wire mesh, special wire mesh, etc.

[0068] Exemplarily, the sieve element includes silk sieve, synthetic fiber sieve, wire mesh sieve, and the wire mesh sieve includes, but is not limited to, square hole mesh, embossed mesh, fine pattern mesh, etc.

[0069] Exemplarily, the sintered mesh element includes stainless steel sintered mesh, titanium sintered mesh, ceramic sintered mesh, orifice plate sintered mesh, five-layer sintered mesh, six-layer sintered mesh, punched plate composite sintered mesh, powder sintered mesh, carbon sintered mesh, metal composite sintered mesh, fiberglass sintered mesh, carbon fiber sintered mesh, etc. Among them, the material of the sintered mesh element can be SS304, SS304L, SS316, SS316L, or special alloy materials such as Hastelloy C-276, Monel alloy 400, duplex stainless steel 2205, etc.

[0070] In one embodiment, the wall thickness of the filter element 2 is 0.5 mm to 20 mm. For example, the wall thickness of the filter element 2 is 0.5 mm, 1 mm, 3 mm, 5 mm, 15 mm, 20 mm, etc. The wall thickness of the filter element 2 in this embodiment is not limited, and the appropriate wall thickness of the filter element 2 can be selected according to the fluid stirring intensity and material characteristics, so that the filter element 2 has a certain support strength and reduces the situation that the filter element 2 is deformed and affects the air permeability and the fluid direction of the gas in the tank body 200.

[0071] In one embodiment, as Figures 1 - 5 shown, the filter element 2 and the air distribution pipe 1 are of a split structure. Since the materials of the filter element 2 and the air distribution pipe 1 may be the same or different, the split-structured filter element 2 and air distribution pipe 1 are free and flexible in manufacturing. Specifically, the filter element 2 and the air distribution pipe 1 are connected by welding or a connecting member 4 to form an integral structure, with a simple process and relatively low production cost. Among them, the connecting member 4 can be a flange, a sleeve, etc.

[0072] In one embodiment, the filter element 2 is of an arc structure, and the outer diameter of the filter element 2 is the same as that of the air distribution pipe 1, and the inner diameter of the filter element 2 is the same as that of the air distribution pipe 1. In this way, the sizes of the filter element 2 and the air distribution pipe 1 are adapted to ensure the docking matching of the filter element 2 and the air distribution pipe 1.

[0073] Specifically, the air distribution pipe 1 includes a plurality of sub-pipe bodies, and two adjacent sub-pipe bodies are connected by the filter element 2. For example, the number of sub-pipe bodies is four, and two adjacent sub-pipe bodies are connected by the filter element 2, and the filter element 2 plays an intermediate connection role.

[0074] Specifically, the number of the filter elements 2 is multiple, and the multiple filter elements 2 are arranged at intervals along the axial direction of the air distribution pipe 1. Adjacent two filter elements 2 are connected by a branch pipe body. For example, the number of the filter elements 2 is two, and the two filter elements 2 are connected by a branch pipe body, and the branch pipe body plays a role of intermediate connection.

[0075] It can be understood that the interval between adjacent two filter elements 2 can be fixed or unfixed, and whether it is a fixed value specifically can be adjusted according to actual production needs.

[0076] Specifically, both the number of the branch pipe bodies and the filter elements 2 is multiple. The filter elements 2 are arranged between adjacent two branch pipe bodies, and the branch pipe bodies are arranged between adjacent two filter elements 2, that is, the branch pipe bodies and the filter elements 2 are arranged alternately.

[0077] Specifically, the multiple filter elements 2 are respectively arranged on two sides or the same side relative to the axial direction of the air distribution pipe 1. That is, the multiple filter elements 2 can be located on the upper side part of the air distribution pipe 1 at the same time, the multiple filter elements 2 can be located on the lower side part of the air distribution pipe 1 at the same time, or the multiple filter elements 2 are respectively located on the upper side part and the lower side part of the air distribution pipe 1. Among them, the axial direction of the air distribution pipe 1 is marked with D.

[0078] In one embodiment, at least one air distribution pipe 1 and at least one filter element 2 form a linear structure or an arc structure.

[0079] Specifically, as Figures 2 - 5 shown, the linear structure includes but is not limited to a straight line and a broken line structure, with good degrees of freedom and flexibility; as Figures 6 - 8 shown, the arc structure is any one of a semi-ring, a circular ring, an elliptical ring, and a polygonal ring, which is beneficial to installation and fixation and is conducive to uniform diffusion of gas in the tank body 200. Among them, the polygonal structure includes but is not limited to a quadrilateral, a pentagon, a hexagon, an octagon, etc.

[0080] It can be understood that the air distribution pipe 1 can be one or multiple. The specific number of the air distribution pipes 1 set and the structural setting of using multiple air distribution pipes 1 can be adjusted according to actual production needs.

[0081] In one embodiment, the central angle of the projection of the filter element 2 on the reference plane is 30° to 360°; wherein, the reference plane is perpendicular to the axial direction of the air distribution pipe 1.

[0082] For example, the central angle of the projection of the filter element 2 on the reference plane is 360°. The filter element 2 is a tubular structure and is adapted to the air distribution pipe 1. Specifically, the inner and outer diameters of the filter element 2 and the inner and outer diameters of the air distribution pipe 1 correspond to be the same, so that the filter element 2 and the air distribution pipe 1 are butted; alternatively, the filter element 2 is arranged inside the air distribution pipe 1, the outer diameter of the filter element 2 is equal to the inner diameter of the air distribution pipe 1, the filter element 2 is fixedly connected to the inner wall of the air distribution pipe 1, and a communication hole is arranged on the air distribution pipe 1 corresponding to the diffusion hole 20, so that gas enters the tank body 200 through the diffusion hole 20 and the communication hole in sequence.

[0083] In one embodiment, the number of the diffusion holes 20 is multiple, and the projections of the multiple diffusion holes 20 on the reference plane are arranged along the circumferential direction of the reference plane. That is, the multiple diffusion holes 20 are distributed on the entire circumferential side wall of the filter element 2, improving the uniformity and dispersion effect of gas diffusion.

[0084] Exemplarily, the multiple diffusion holes 20 are distributed in a circle layer along the circumferential side wall of the filter element 2, and the diffusion holes 20 of the multiple layers are distributed along the axial direction of the filter element 2, so that the multiple diffusion holes 20 cover the entire circumferential side wall of the filter element 2.

[0085] It should be specifically noted that when at least one air distribution pipe 1 and at least one filter element 2 form an arc structure, the central axial direction of the arc structure and the axial direction of the air distribution pipe 1 are in different directions, the central axial direction of the arc structure is perpendicular to the axial direction of the air distribution pipe 1, and the central axial direction of the arc structure is parallel to the reference plane.

[0086] In one embodiment, the aperture of the diffusion hole 20 is 1um to 1000um.

[0087] It can be understood that the apertures of the diffusion holes 20 can be the same or different. If the gas pressures entering the air distribution pipe 1 are the same, the air outlet uniformity of the diffusion holes 20 can be ensured regardless of whether the apertures of the diffusion holes 20 are consistent.

[0088] The air distribution structure provided by the present application can improve the utilization rate of biological metabolic oxygen, improve the fermentation yield, save energy, improve the mass transfer and oxygen transfer capacity of the entire biological metabolic system, improve the dissolved oxygen level, enhance the fermentation metabolic capacity, rapidly accumulate fermentation products, and improve the yield during the production process of long-chain dibasic acid fermentation. By setting the aperture, angle and distribution of the diffusion holes 20, the present utility model outputs oxygen without dead angles, can maximize the utilization and improve the mass transfer and oxygen transfer effect during the fermentation metabolism process, improve the oxygen utilization rate, enhance the activity, facilitate biological transformation, improve the fermentation production index, and can achieve the purpose of energy saving in fermentation production, shorten the fermentation cycle, and reduce the consumption of various energy sources such as circulating water, air, electricity and other production materials.

[0089] Embodiment Two

[0090] This embodiment is similar to Embodiment 1, and the only difference lies in the specific detailed structure of the filter element 2.

[0091] As Figures 9 - 10 shown, the central angle of the projection of the filter element 2 provided in this embodiment on the reference plane is 180°, that is, the filter element 2 is in a semi-circular ring structure, and the inner and outer diameters of the filter element 2 are adapted to the inner and outer diameters of the air distribution pipe 1.

[0092] Since the semi-circular ring-structured filter element 2 does not contact the air distribution pipe 1 throughout the entire circle, the contact area between the semi-circular ring-structured filter element 2 and the inner wall of the air distribution pipe 1 is relatively small, which is convenient for welding, has a simple process, and relatively low production costs.

[0093] Specifically, an opening is provided in the upper side portion of the air distribution pipe 1 corresponding to the filter element 2, and the opening is used to accommodate and install the filter element 2. The lower side portion of the air distribution pipe 1 corresponding to the filter element 2 is for the flow of gas. The air volume of the upper side portion is relatively large, and the gas disturbance is relatively intense between the upper side portion and the lower side portion or in the local range nearby, improving the gas dispersion speed.

[0094] Embodiment 3

[0095] This embodiment has a similar structure to Embodiment 1, and the only difference lies in the structure and arrangement of the filter element 2.

[0096] As Figures 11 - 12 shown, the filter element 2 provided in this embodiment includes a first filter element 21 and a second filter element 22, and the central angles of the projections of the first filter element 21 and the second filter element 22 on the reference plane are different.

[0097] For example, the central angle of the projection of the first filter element 21 on the reference plane is 360°, and the central angle of the projection of the second filter element 22 on the reference plane is 180°. The first filter element 21 can be called a ring structure, and the second filter element 22 can be called a semi-circular ring structure.

[0098] Through the mutual cooperation of the first filter element 21 and the second filter element 22, the gas diffusion method can be adjusted according to the actual use situation, with a wide range of use scenarios and strong versatility. It can be understood that the types of the filter element 2 can be the same or different, and the central angle of the projection of the filter element 2 on the reference plane can also be 30°, 60°, 90°, 120°, etc.

[0099] Specifically, the first filter element 21 and the second filter element 22 are arranged on both sides or the same side with respect to the axial direction of the air distribution pipe 1. That is, different types of filter elements 2 can be located on the upper side portion or the lower side portion of the air distribution pipe 1 at the same time, or different types of filter elements 2 are respectively located on the upper and lower sides of the air distribution pipe 1.

[0100] Specifically, at least one first filter element 21 is disposed between two adjacent second filter elements 22; and / or, at least one second filter element 22 is disposed between two adjacent first filter elements 21.

[0101] Exemplarily, the semi-circular structures and circular structures are arranged alternately, i.e., ABAB arrangement; alternatively, it can be that a semi-circular structure, a circular structure, a circular structure, and a semi-circular structure are arranged in sequence, i.e., ABBA arrangement; alternatively, in the ABBA alternating pattern, one of the semi-circular structures is located in the upper part of the air distribution pipe 1, and the other semi-circular structure can also be located in the lower part of the air distribution pipe 1.

[0102] Embodiment 4

[0103] This embodiment is similar to Embodiment 1, and the only difference lies in the different diffusion holes 20.

[0104] The diffusion holes 20 provided in this embodiment include first diffusion holes and second diffusion holes. The distance between the first diffusion holes and the intake pipe 3 is less than the distance between the second diffusion holes and the intake pipe 3; wherein, the aperture of the first diffusion holes is smaller than the aperture of the second diffusion holes.

[0105] Since the distance between the first diffusion holes and the intake pipe 3 is relatively close, and the distance between the second diffusion holes and the intake pipe 3 is relatively far, the air pressure near the first diffusion holes is relatively high, and the air pressure near the second diffusion holes is relatively low. The aperture of the first diffusion holes can be appropriately reduced, and the aperture of the second diffusion holes can be appropriately increased, that is, a smaller aperture corresponds to the position with higher air pressure, and a larger aperture corresponds to the position with lower air pressure, to ensure the uniformity of gas filtration and diffusion from the diffusion holes 20.

[0106] Among them, the aperture of the first diffusion holes is 1um to 500um. For example, the aperture of the first diffusion holes is 1um, 10um, 100um, 500um, etc.; the aperture of the second diffusion holes is 500um to 1000um. For example, the aperture of the second diffusion holes is 501um, 60um, 800um, 1000um, etc.

[0107] In one embodiment, the distance between the first diffusion holes and the intake pipe 3 is less than or equal to the radius of the outer circle in the arc structure; and / or, the distance between the second diffusion holes and the intake pipe 3 is greater than the radius of the outer circle in the arc structure.

[0108] Exemplarily, if the air distribution pipe 1 is a circular ring structure, after the gas introduced from the air inlet pipe 3 enters the air distribution pipe 1, the gas flows through the air distribution pipe 1 to the first position. The central angle between the first position and the air inlet pipe 3 is approximately 90°, and the pressure of the gas is relatively large in this first stage. The gas continues to flow along the air distribution pipe 1, and the gas flows from the first position to the second position. The central angle between the second position and the air inlet pipe 3 is approximately 180°, and the pressure of the gas is relatively small in this second stage.

[0109] According to the outer radius of the arc structure, the first stage and the second stage are divided, and the outer radius of the arc structure is used as the boundary for distinguishing the first diffusion hole and the second diffusion hole, further improving the uniformity of gas diffusion.

[0110] It should be noted here in the embodiments of the present invention that only one example of adopting the principle of the present invention is shown in the drawings and described in this specification. Those of ordinary skill in the art should clearly understand that the principle of the present invention is not limited to any details of the device shown in the drawings or described in the specification or any component.

[0111] It should be understood that the present invention does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The present invention can have other embodiments and can be implemented and executed in various ways. The foregoing variations and modifications fall within the scope of the present invention. It should be understood that the present invention disclosed and defined in this specification extends to all alternative combinations of two or more separate features mentioned or obvious in the text and / or drawings. All these different combinations constitute multiple alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for implementing the present invention and will enable those skilled in the art to utilize the present invention.

[0112] After considering the specification and practicing the creation disclosed here, those skilled in the art will easily think of other embodiments of the present invention. The present invention aims to cover any variations, uses, or adaptive changes of the present invention, which follow the general principles of the present invention and include common general knowledge or conventional technical means in the technical field not disclosed in the present invention. The specification and the example embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the appended claims.

[0113] It should be understood that the present invention is not limited to the precise structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The protection scope of the present invention is only limited by the appended claims.

Claims

1. An air diffusion structure, characterized in that Comprising: An intake pipe for introducing gas; An air distribution pipe communicated with the intake pipe; A filter element arranged on the air distribution pipe, and the filter element is provided with diffusion holes; Wherein, the gas entering from the intake pipe is transported to the filter element through the air distribution pipe and is filtered and diffused through the diffusion holes.

2. The air diffusion structure according to claim 1, characterized in that The number of the diffusion holes is multiple, and the projections of the multiple diffusion holes on a reference plane are arranged along the circumferential direction of the reference plane; Wherein, the reference plane is perpendicular to the axial direction of the air distribution pipe.

3. The air diffusion structure according to claim 1, wherein The filter element and the air distribution pipe are of a split structure; And / or, the filter element and the air distribution pipe are connected by welding or a connecting piece.

4. The air diffusion structure according to claim 1, characterized in that, The filter element is of an arc structure, the outer diameter of the filter element is the same as the outer diameter of the air distribution pipe, and the inner diameter of the filter element is the same as the inner diameter of the air distribution pipe; And / or, the wall thickness of the filter element is 0.5 mm to 20 mm; And / or, the aperture of the diffusion hole is 1 um to 1000 um.

5. The air diffusion structure according to claim 1, characterized in that, The air distribution pipe comprises a plurality of sub-pipe bodies, and two adjacent sub-pipe bodies are connected by the filter element; And / or, the number of the filter elements is multiple, the multiple filter elements are arranged at intervals along the axial direction of the air distribution pipe, and two adjacent filter elements are connected by the sub-pipe body; And / or, the multiple filter elements are respectively arranged on two sides or the same side with respect to the axial direction of the air distribution pipe.

6. The air diffusion structure according to any one of claims 1-5, characterized in that, The central angle of the projection of the filter element on the reference plane is 30° to 360°; Wherein, the reference plane is perpendicular to the axial direction of the air distribution pipe.

7. The air diffusion structure according to claim 6, characterized in that, The filter element comprises a first filter element and a second filter element, and the central angles of the projections of the first filter element and the second filter element on the reference plane are different; Wherein, the first filter element and the second filter element are respectively arranged on two sides or the same side with respect to the axial direction of the air distribution pipe; and / or, at least one first filter element is arranged between two adjacent second filter elements; and / or, at least one second filter element is arranged between two adjacent first filter elements.

8. The air diffusion structure according to any one of claims 1-5, characterized in that, At least one air distribution pipe and at least one filter element form a linear structure or an arc structure; Wherein, the arc structure is any one of a semi-ring, a ring, an elliptical ring, and a polygonal ring.

9. The air diffusion structure according to claim 1, characterized in that The diffusion hole comprises a first diffusion hole and a second diffusion hole, and the distance between the first diffusion hole and the intake pipe is less than the distance between the second diffusion hole and the intake pipe; Wherein, the aperture of the first diffusion hole is less than the aperture of the second diffusion hole.

10. The air diffusion structure according to claim 1, characterized in that The filter element is at least one of a filter mesh element, a wire mesh element, a screen mesh element, a sintered mesh element, a sintered felt element, a powder sintered element, and a membrane filter element.

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