Inlet diffuser and downstream reactor

Abstract

The inlet diffuser comprises a fluid director (1), a fluid breaking sheet (2) and a mounting component, a central through hole (14) and a plurality of auxiliary circulation holes (15) which are uniformly distributed along the circumference are formed in the fluid director, and the lower side of each auxiliary circulation hole is connected with a baffle (16); the flow breaking sheet is a horizontal or conical disc, a plurality of notches (21) are uniformly formed in the edge of the flow breaking sheet, and the flow breaking sheet is fixed below the fluid director and is coaxial with the central through hole; and the mounting component is positioned on the upper surface of the fluid director (1) and is used for connecting the fluid director with the upper surface of the container. The inlet diffuser provided by the utility model is simple in structure, reasonable in design and convenient to install, can realize uniform distribution of liquid, and is suitable for various industrial processes in which the liquid needs to be uniformly distributed to a plurality of positions, such as petroleum refining, chemical engineering, sewage treatment and the like.

Description

Technical Field

[0001] The present disclosure relates to the field of liquid distribution technology, and in particular to an inlet diffuser used in industrial processes such as petroleum refining, chemical industry and sewage treatment. Background Art

[0002] Inlet diffusers are crucial internal components in industrial processes such as petroleum refining, chemical processing, and wastewater treatment. Their primary function is to evenly distribute liquid to predetermined locations, ensuring smooth process flow and improved efficiency. However, existing inlet diffuser designs often suffer from complex structures, difficult installation, and uneven liquid distribution. These complex structures not only increase manufacturing and maintenance costs but can also lead to operational difficulties and increased failure rates. Uneven liquid distribution can also reduce process efficiency and even compromise product quality.

[0003] Traditional inlet diffusers typically use porous plates, nozzles, or flow tubes. The porous plates attempt to achieve uniform distribution of the liquid by designing the pore size and hole spacing, but the results are often unsatisfactory due to the liquid's flow characteristics and uneven pressure distribution. While the nozzle and flow tube structures can improve the distribution effect to a certain extent, their design is complex, prone to clogging, and difficult to adapt to the needs of different working conditions. Furthermore, in actual applications, inlet diffusers are often affected by factors such as liquid viscosity and flow rate, resulting in unstable distribution effects, further increasing operational difficulty and maintenance costs.

[0004] Therefore, designing an inlet diffuser with a simple structure, easy installation, adaptability to various working conditions, and uniform liquid distribution has become a key requirement for improving industrial process efficiency and product quality. This not only reduces manufacturing and maintenance costs, but also ensures process stability and reliability. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an inlet diffuser which has a simple structure, is easy to install and can achieve uniform distribution of liquid on the basis of the existing technology.

[0006] In the first aspect, the utility model provides an inlet diffuser, including a deflector 1, a flow-breaking piece 2 and a mounting component, wherein the deflector is a horizontal or conical disc with a central through hole 14 and a plurality of secondary flow holes 15 evenly distributed along the circumference, and each secondary flow hole is connected to a baffle 16 on the lower side; the flow-breaking piece is a horizontal or conical disc with a plurality of notches 21 evenly opened on the edge, and the flow-breaking piece is fixed below the deflector and is coaxially arranged with the central through hole 14; the mounting component is located on the upper surface of the deflector 1 and is used to connect the deflector to the upper surface of the container.

[0007] In a second aspect, the present invention provides a down-type reactor, characterized in that the above-mentioned inlet diffuser is installed on the top of the down-type reactor.

[0008] Compared with the prior art, the inlet diffuser and reactor provided by the present invention have the following beneficial effects:

[0009] (1) Good liquid distribution effect: The inlet diffuser provided by the present invention is used for liquid flow distribution. A central through hole and a secondary flow hole are designed on the deflector. A flow fragmentation piece is designed below the central through hole. The flow fragmentation piece cooperates with the main deflector to achieve uniform overall liquid distribution. Specifically, after the liquid reaches the deflector, the first part of the liquid reaches the flow fragmentation piece at the bottom through the central through hole. The liquid is broken on the flow fragmentation piece, some of which flows down along the notch, and the other part flows down along the fins of the flow fragmentation piece, achieving uniform distribution of the innermost liquid. The remaining liquid flows along the upper surface of the deflector to the edge, and the second part of the liquid enters the secondary flow hole. The baffle effectively prevents the liquid from flowing along the lower surface of the deflector under the action of surface tension, plays a role in guiding the liquid, and achieves uniform distribution of the liquid below the deflector. After the third part of the liquid reaches the edge of the deflector, it separates from the edge of the deflector under the action of gravity and distributes to the surroundings, achieving uniform distribution of the outermost liquid.

[0010] (2) Simple structure and easy installation and maintenance: The inlet diffuser provided by the utility model adopts a structural design of a flat plate or conical disc, a baffle, and a mounting member, which reduces complex parts, lowers manufacturing costs and processing difficulty. The inlet diffuser can be easily fixed to the equipment, reducing the tedious steps during the installation process. At the same time, it also reduces downtime and equipment maintenance costs.

[0011] (3) Adaptability to various working conditions and stable operation: The inlet diffuser provided by the utility model has low requirements on parameters such as liquid viscosity and flow rate, and is adaptable to various working conditions. It can achieve uniform distribution of liquid without additional pressure, thereby improving the energy efficiency and operational stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings help to further understand the contents of the present invention and constitute a part of the specification. These drawings, together with the following detailed description, are used to explain the present invention but do not constitute a limitation thereof. In these drawings:

[0013] Figure 1 This is a structural schematic diagram of the first embodiment of the inlet diffuser provided by the utility model.

[0014] Figure 2 This is a front view of the first embodiment of the inlet diffuser provided by the utility model.

[0015] Figure 3This is a top view of the first embodiment of the inlet diffuser provided by the utility model.

[0016] Figure 4 This is a front view of the second embodiment of the inlet diffuser provided by the utility model.

[0017] Reference numerals:

[0018] 1- deflector 2- flow fragment 11- support rod

[0019] 12-Mounting plate 13-Bolt hole 14-Center through hole

[0020] 15- auxiliary flow hole 16- baffle 21- notch

[0021] 22-Connecting rod DETAILED DESCRIPTION

[0022] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0023] In the first aspect, the utility model provides an inlet diffuser, comprising a deflector 1, a flow-breaking piece 2 and a mounting member, wherein the deflector is a horizontal or conical disc having a central through hole 14 and a plurality of secondary flow holes 15 evenly distributed along the circumference, and each secondary flow hole is connected to a baffle 16 on the lower side; the flow-breaking piece is a horizontal or conical disc having a plurality of fins 21 formed by slots on the edge, and the flow-breaking piece is fixed below the deflector and is coaxially arranged with the central through hole 14; the mounting member is located on the upper surface of the deflector 1 and is used to connect the deflector to the upper surface of the container.

[0024] In the inlet diffuser of the present invention, the cone angle of the deflector is 120°-180°, and the cone angle of the flow breakers is 120°-180°. Preferably, the cone angle of the deflector is 150°-180°, and the cone angle of the flow breakers is 150°-180°. The cone angles of the deflector and the flow breakers may be the same or different. Preferably, the cone angles of the deflector and the flow breakers are the same, and the two are arranged in parallel.

[0025] If the cone angle of the deflector and the flow breakers is too small, during use, the upper surface of the deflector and the flow breakers will be steeper, and the liquid will flow down along their upper surface faster, causing the liquid to be mainly distributed on the outside and unevenly distributed.

[0026] Preferably, the ratio of the outer diameter of the deflector to the outer diameter of the flow-breaking piece is 2.5-5.5, preferably 3.0-5.0.

[0027] Preferably, the ratio of the radius of the deflector to the inscribed circle of the secondary flow hole is 1.5-3.5, preferably 1.8-3.0.

[0028] The deflector is provided with a central through hole and multiple secondary circulation holes. In a top view, the central through hole and the secondary circulation holes can be triangular, rectangular, polygonal, circular, elliptical, or irregularly shaped. Preferably, the equivalent diameter of the central through hole is 8-16 mm, and the equivalent diameter of the secondary circulation holes is 16-24 mm. Preferably, the central through hole and the secondary circulation holes are circular.

[0029] Preferably, the outer diameter of the flow-breaking piece is 30-50 mm, and the diameter of the inscribed circle of the plurality of secondary flow holes is 50-70 mm.

[0030] Preferably, the distance between the flow-breaking piece and the lower surface of the deflector is 10-15 mm, and the depth of the notch on the edge of the flow-breaking piece is 10-15 mm. The distance between the flow-breaking piece and the lower surface of the deflector refers to the distance between the top of the flow-breaking piece and the lower surface of the deflector.

[0031] The flow-breaking piece is a flat plate or a conical disc, with multiple notches evenly opened along the circumference of the edge. The notches are rectangular, semicircular, serrated, wavy or trapezoidal in shape, with a notch depth of 10-15 mm, and fins are formed between two notches.

[0032] The plurality of fins on the flow-breaking piece are evenly distributed and correspond one to one with the plurality of secondary flow holes.

[0033] Preferably, the baffle is vertically arranged on the lower surface of the deflector with a height of 20-30 mm. The baffle is arranged outside the secondary flow hole and has a horizontal cross-section that is linear, V-shaped or arc-shaped.

[0034] A mounting member is fixed on the deflector. Preferably, the mounting member is composed of two or more support rods and a mounting plate on the upper portion of the support rods, and the mounting plate is provided with bolt holes.

[0035] In one embodiment, baffles are provided on the lower sides of the plurality of secondary flow holes, and the lower surfaces of the baffles are located in the same horizontal plane and are 10-20 mm lower than the edge of the main flow guide.

[0036] In one embodiment, the flow-breaking piece is located directly below the central through hole, and the top of the flow-breaking piece is 10-15 mm away from the upper plane of the guide plate.

[0037] In one embodiment, the mounting assembly comprises three support rods evenly distributed on the deflector, each with a mounting plate secured to its top. Each mounting plate has bolt holes. The inlet diffuser is bolted to the device through the bolt holes in the mounting plate.

[0038] In the present invention, the fixed connection is achieved by welding or integral molding. In one embodiment, the deflector, support rod, mounting plate, baffle, flow breakers, and connecting rod provided by the present invention are connected by welding. All components in the present invention are made of corrosion-resistant materials and are welded or integrally molded, thereby improving the overall strength and service life of the inlet diffuser and reducing the frequency of equipment replacement.

[0039] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited thereto.

[0040] Attachment Figure 1 This is a structural diagram of an embodiment of the inlet diffuser provided by the utility model. Figure 2 This is a front view of an embodiment of the inlet diffuser. Figure 1 、 Figure 2 As shown, the inlet diffuser of the present invention is composed of a deflector 1, a flow-breaking piece 2 and a mounting member. The deflector 1 and the flow-breaking piece 2 are both conical discs with the same cone angle of 120°-170°. A central through hole 14 is provided in the center of the deflector 1, and six secondary flow holes 15 are evenly distributed along the circumference of the outer side of the central through hole. A baffle 16 is connected below each secondary flow hole 15. A coaxial flow-breaking piece 2 is installed below the central through hole 14, and the flow-breaking piece 2 is fixed to the lower surface of the deflector 1 by three connecting rods 22. The flow-breaking piece 2 is a conical disc with evenly notched edges to form six fins 21, which correspond one to one with the secondary flow holes. The mounting member is composed of a support rod 11 and a mounting plate 12. Three support rods 11 are provided on the upper surface of the deflector 1. The top of each support rod 11 is connected to a mounting plate 12, and the mounting plate 12 is provided with bolt holes 13. It is used to install the inlet diffuser on the top equipment.

[0041] Attachment Figure 3 This is a top view of the first embodiment of the inlet diffuser provided by the utility model. Figure 3 As shown, the deflector 1 and the flow breakers 2 are coaxially arranged. The deflector 1 has a central through hole 14, with six secondary flow holes 15 evenly distributed around the circumference. A semicircular baffle 16 is located below and outside the secondary flow holes. Preferably, both the central through hole and the secondary flow holes are circular. The flow breakers 2 have six fins, each corresponding to one of the secondary flow holes.

[0042] The outer diameter of the flow-breaking piece 2 is 30-50 mm, and the diameter of the inscribed circle of the secondary flow hole 15 is 50-70 mm. The outer diameter of the flow-breaking piece 2 is smaller than the inscribed circle diameter of the secondary flow hole 15 to ensure that the liquid distribution areas of the two do not overlap.

[0043] The diameter of the central through hole is 8-16 mm, and the diameter of the secondary flow hole is 16-24 mm; the main flow hole is smaller than the diameter of the secondary flow hole to ensure that after the liquid reaches the main flow diverter 1, most of it flows around along the upper surface of the main flow diverter 1.

[0044] Attachment Figure 4 This is a front view of the second embodiment of the inlet diffuser provided by the utility model. Figure 1 The difference is that the deflector 1 and the flow-breaking piece 2 are both flat discs with a cone angle of 180°.

[0045] In the application method of the inlet diffuser provided by the present invention, after the liquid phase fluid reaches the deflector 1, the first portion of the liquid passes through the central through-hole 14 and reaches the lower flow-breaking disc 2. After being broken up by the flow-breaking disc 2, the liquid is evenly distributed in the innermost portion. The remaining liquid flows outward along the upper surface of the deflector 1. After reaching the edge of the deflector 1, the second portion of this liquid, due to its inherent velocity and gravity, separates from the edge of the deflector 1, achieving even distribution of the liquid in the outermost portion. The third portion of the liquid enters the secondary flow hole 15 and, after being guided by the baffle 16, achieves even distribution of the liquid in the middle portion.

[0046] Reference Attachment Figure 3 The baffle 16 is vertically fixed on one side close to the edge of the deflector 1. Its main function is to guide the liquid. After the liquid enters the secondary flow hole 15, it will flow along the lower surface of the deflector 1 under the action of surface tension, thereby causing the liquid distribution effect to deteriorate. The baffle 16 can largely collect the liquid entering the secondary flow hole 15 and guide the liquid to flow downward, effectively avoiding uneven distribution of the liquid. The shape of the baffle 16 can be a flat baffle, a V-shaped baffle, or an arc baffle. The lower surface of the baffle 16 is located on the same horizontal plane, 10-20 mm lower than the edge of the main deflector 1.

[0047] refer to Figure 2 and Figure 3 The flow-breaking piece 2 is located directly below the central through hole 14, and the top of the flow-breaking piece 2 is 10-15 mm away from the upper plane of the central through hole 14. This distance should not be too large, because if the distance is too large, the liquid will have a higher speed when reaching the flow-breaking piece 2, and the liquid will easily collide with the flow-breaking piece 2 and splash, and the effect of the flow-breaking piece 2 will be reduced.

[0048] refer to Figure 2 and Figure 3The edge of the flow fragment 2 is radially notched 21 , and the shape of the notch 21 is rectangular, semicircular, serrated, wavy or trapezoidal. In the two exemplary embodiments provided in this section, the shape of the notch 21 is rectangular.

[0049] refer to Figure 1 The deflector 1, support rod 11, mounting plate 12, baffle 16, flow fragment 2, and connecting rod 22 are connected by welding, or the entire inlet diffuser is formed in one piece, and the inlet diffuser is bolted to the applied equipment through the bolt holes 13 on the mounting plate 12.

[0050] In summary, the inlet diffuser proposed in the present invention achieves uniform distribution of liquid through the close cooperation of the flow guide and the flow breakers. It is reasonably designed and optimized, has a simple structure and is easy to install.

[0051] The following examples illustrate the specific implementation and technical effects of the inlet diffuser provided by the present invention. It should be noted that the examples do not limit the scope of protection of the present invention in any way.

[0052] Example 1

[0053] The inlet diffuser of Example 1 is as follows Figure 1-Figure 3 As shown, both the deflector 1 and the flow breakers 2 are conical disks, with a cone angle of 150°. The deflector 1 has an outer diameter of 140 mm. In the top view, the central through-hole and the secondary flow holes are both circular. The central through-hole 14 has a diameter of 12 mm, the secondary flow hole 15 has a diameter of 20 mm, and the diameter of the inscribed circle of the secondary flow hole 15 is 60 mm. The baffles 16 below the secondary flow holes 15 are semicircular, with their lower surfaces lying on the same horizontal plane, 15 mm below the edge of the deflector 1. The flow breakers 2 have an outer diameter of 40 mm, and the top of the flow breakers 2 is 12.36 mm from the upper plane of the central through-hole 14. The slots on the edges of the flow breakers 2 are rectangular, and in the top view, the slots are 5 mm wide and 12.5 mm deep.

[0054] The experimental process uses air as gas phase and tap water as liquid phase. When the liquid phase flow rate is 0.11m 3 / h, gas phase flow rate is 0.6m 3 Under the operating conditions of 1000 rpm and 1000 rpm, samples were taken at different positions of the radial cross section 200 mm below the inlet diffuser. The liquid distribution performance of the inlet diffuser of this embodiment was analyzed by the sampling method, and the liquid distribution unevenness was calculated to be 0.22.

[0055] The liquid distribution performance is characterized by the liquid distribution unevenness calculated by the following formula:

[0056]

[0057] Among them, M f The value ranges from 0 to 1, Mf =0 indicates ideal uniform distribution, M f =1 means that all fluid flows out through a single liquid distribution port.

[0058] Example 2

[0059] Example 2 uses Figure 4 The inlet diffuser, deflector 1, and flow breakers 2 shown are all circular flat plates with a taper angle of 180°. Deflector 1 has an outer diameter of 140 mm, a central through-hole 14 with a diameter of 12 mm, a secondary flow hole 15 with a diameter of 20 mm, and an inscribed circle with a diameter of 60 mm. The semicircular baffle 16 below the secondary flow hole is 15 mm high. The flow breakers 2 have a diameter of 40 mm, with their upper plane 12.36 mm from the upper plane of the deflector. Six rectangular slots, 5 mm wide and 12.5 mm deep, are cut into their edges.

[0060] When the liquid phase flow rate is 0.11m 3 / h, gas phase flow rate is 0.6m 3 The experiment was conducted under the operating conditions of 1000 nm / h, and the same sampling and data processing methods as in Example 1 were adopted. The calculated liquid distribution unevenness was 0.12.

Claims

1. An inlet diffuser, characterized in that: The invention comprises a flow deflector (1), a flow-breaking piece (2) and a mounting member, wherein the flow deflector is a horizontal or conical disc having a central through hole (14) and a plurality of auxiliary flow holes (15) evenly distributed along the circumference, and the lower side of each auxiliary flow hole is connected to a baffle (16); the flow-breaking piece is a horizontal or conical disc having a plurality of notches (21) evenly distributed on the edge, and the flow-breaking piece is fixed below the flow deflector and is coaxially arranged with the central through hole; the mounting member is located on the upper surface of the flow deflector (1) and is used to connect the flow deflector to the upper surface of the container.

2. The inlet diffuser according to claim 1, characterized in that The cone angle of the deflector (1) is 120°-180°, and the cone angle of the flow-breaking piece (2) is 120°-180°.

3. The inlet diffuser according to claim 2, characterized in that The cone angle of the deflector is 150°-180°, and the cone angle of the flow fragments is 150°-180°.

4. The inlet diffuser according to any one of claims 1 to 3, characterized in that The ratio of the outer diameter of the deflector to the outer diameter of the flow-breaking piece is 2.5-5.

5.

5. The inlet diffuser according to claim 4, characterized in that The ratio of the outer diameter of the deflector to the outer diameter of the flow-breaking piece is 3.0-5.

0.

6. The inlet diffuser according to any one of claims 1 to 3, characterized in that: The ratio of the radius of the deflector to the radius of the inscribed circle of the secondary flow hole is 1.5-3.

5.

7. The inlet diffuser according to claim 6, characterized in that The ratio of the radius of the deflector to the radius of the inscribed circle of the secondary flow hole is 1.8-3.

0.

8. The inlet diffuser according to any one of claims 1 to 3, characterized in that: The equivalent diameter of the central through hole is 8-16 mm, and the equivalent diameter of the secondary flow hole is 16-24 mm.

9. The inlet diffuser according to any one of claims 1 to 3, characterized in that: The central through hole and the secondary flow hole are circular.

10. The inlet diffuser according to claim 6, characterized in that The outer diameter of the flow-breaking piece is 30-50 mm, the distance between the flow-breaking piece and the lower surface of the guide is 10-15 mm, the notch depth of the edge of the flow-breaking piece is 10-15 mm; the diameter of the inscribed circle of the plurality of secondary flow holes is 50-70 mm.

11. The inlet diffuser according to any one of claims 1 to 3, characterized in that: The plurality of fins on the flow-breaking piece are evenly distributed and correspond one to one with the plurality of secondary flow holes.

12. The inlet diffuser according to any one of claims 1 to 3, characterized in that: The baffle is vertically arranged on the lower surface of the deflector, with a height of 20-30 mm. The baffle is arranged outside the secondary flow hole, and the horizontal cross section is linear, V-shaped or arc-shaped.

13. The inlet diffuser according to any one of claims 1 to 3, characterized in that: The mounting component is composed of two or more support rods (11) and a mounting plate (12) on the upper part of the support rods, and the mounting plate is provided with bolt holes (13).

14. A down-type reactor, characterized in that: The top of the down-type reactor is equipped with the inlet diffuser according to any one of claims 1 to 13.

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