Split-type inner cylinder with rectifying device

Abstract

The invention discloses a split type inner cylinder with a rectifying device. The kiln tail preheater comprises a fixed seat, a top arc-shaped hanging piece, a common arc-shaped hanging piece, an arc-shaped hanging piece with a hook, a sleeve, a rectifying blade, a reinforcing plate and the like, the fixed seat is fixed on a cyclone outlet flange, and the top arc-shaped hanging piece is hung on the fixed seat through the T-shaped opening; the common arc-shaped hanging pieces and the top arc-shaped hanging pieces are connected in a staggered mode. A certain ring in the middle of the inner cylinder adopts an arc-shaped hanging piece with a hook; the sleeve is mounted from top to bottom; the outer edge of the rectifying blade is welded with the sleeve, and the center of the rectifying blade is connected with the connecting plate; the rectifying device is fixed on the hook of the hanging piece of the inner barrel, so that spiral ascending airflow can be converted into axial vertical ascending airflow, and the kinetic energy loss of the airflow is reduced; meanwhile, the split type inner barrel is formed by connecting the arc-shaped hanging pieces in an up-down staggered mode, installation is easy and convenient, the local hanging pieces of the inner barrel can be rapidly replaced when going wrong, and the reliability of equipment is improved.

Description

Technical Field

[0001] The invention belongs to the field of kiln tail preheaters for cement industry, and relates to a sliced ​​inner cylinder with a rectifying device; specifically, it relates to a sliced ​​inner cylinder with a rectifying device used in a cyclone of a preheater. Background Art

[0002] In the new dry process cement production technology, the material completes heat exchange and pre-decomposition in the preheater. The cyclones at each level of the preheater use the centrifugal force generated by the high-speed rotation of the gas-solid mixture to separate the dust from the airflow. The separation efficiency and pressure loss of the inner cylinder are important parameters that characterize the performance of the cyclone, which directly affect the energy consumption index and dust emission concentration of the entire firing system (especially the first-level inner cylinder).

[0003] The primary inner cylinder of the preheater in the existing cement production line is mostly an integral structure, made of stainless steel plate welding, with a simple structure. However, when it is partially burned or has other mechanical problems and needs to be replaced, it must be replaced as a whole. When it is dismantled and reinstalled, it will also cause difficulties in construction, large material and labor consumption due to limitations such as the size of the inspection door and on-site space. The pressure loss at the entrance of the inner cylinder of the conventional cyclone accounts for 40% to 50% of the total pressure loss of the cyclone. This is mainly because the strong vortex at the center of the cyclone and the "short-circuit flow" at the entrance of the inner cylinder cause strong friction at the entrance of the inner cylinder, resulting in a large pressure loss. In addition, the strong "short-circuit flow" also takes away a large amount of fine powder, reducing the separation efficiency of the cyclone. Summary of the invention

[0004] In view of the above problems, the purpose of the present invention is to propose a segmented inner cylinder equipped with a rectifying device which is easy to install and dismantle. Without reducing the separation efficiency of the cyclone, the spiral rising airflow is converted into an axial vertical rising airflow, thereby reducing the kinetic energy loss of the airflow and greatly reducing the pressure loss. At the same time, arc-shaped hanging pieces are installed in an alternating manner up and down, which can be quickly replaced when local problems occur during the production process, and the number of hanging pieces and rings can be adjusted to meet the requirements of different specifications.

[0005] The technical solution of the present invention is: the sliced ​​inner cylinder with a rectifying device described in the present invention comprises a fixing seat, a bolt, a nut, a top arc hanging piece and upper, middle and lower three layers of common arc hanging pieces, wherein the top arc hanging piece and the upper, middle and lower three layers of common arc hanging pieces together constitute the inner cylinder;

[0006] Two T-shaped openings are arranged on the upper part of the top arc hanging piece, and the top arc hanging piece is respectively suspended on two adjacent fixing seats through the two T-shaped openings. The fixing seats are evenly fixed on the flange of the cyclone outlet along the circumferential direction by bolts 1 and nuts 1.

[0007] Furthermore, the upper common arc hanging piece is arranged at the lower end of the top arc hanging piece, and a connecting clip 1 and a connecting plate 1 are longitudinally arranged at the connection between the upper common arc hanging piece and the top arc hanging piece, and the upper common arc hanging piece is staggeredly connected with the top arc hanging piece above it through the longitudinally arranged connecting clip 1 and connecting plate 1;

[0008] The upper and middle layers of common arc-shaped hanging pieces are staggeredly connected by longitudinally arranged connecting clips and connecting plates;

[0009] The middle and lower layers of common arc-shaped hanging pieces are staggeredly connected by longitudinally arranged connecting clips and connecting plates;

[0010] The bottoms of the lower common arc hanging pieces are connected in pairs through two connecting clips and two connecting plates arranged transversely.

[0011] Furthermore, a plurality of the top arc-shaped hanging pieces form a first ring of the inner tube;

[0012] The upper common arc hanging piece and the top arc hanging piece form the second ring of the inner cylinder;

[0013] The third ring of the inner cylinder is formed between the upper and middle common arc hanging pieces;

[0014] The fourth ring of the inner cylinder is formed between the middle and lower layers of common arc hanging pieces;

[0015] The bottom of the lower common arc hanging piece forms the fifth ring of the inner cylinder.

[0016] Furthermore, any middle-layer common arc-shaped hanging piece in the inner tube can be an arc-shaped hanging piece with a hook;

[0017] The sleeve is installed from top to bottom, and a plurality of hooks arranged on the hooked arc-shaped hanging pieces are used to support the flange arranged on the sleeve.

[0018] Furthermore, a plurality of triangular fan-shaped rectifying blades, a guide plate, a first connecting plate, a second connecting plate, a third connecting plate, a second bolt, a second nut and a washer are arranged inside the inner cylinder;

[0019] The rectifying blades and the guide plates are welded to form a rectifying piece, and a plurality of rectifying pieces are evenly distributed in the inner cylinder in the same rotation direction;

[0020] The outer edge of the rectifier is welded to the sleeve, and the central part is connected to the connecting plate 1, the connecting plate 2, and the connecting plate 3 through bolts 2, nuts 2 and corresponding washers to form a whole.

[0021] Furthermore, it also includes at least two reinforcing plates, the two reinforcing plates form a group, one end of which is welded to the hooked arc-shaped hanging piece, and the other end is tightly welded to the two side surfaces of the rectifier piece.

[0022] Furthermore, the number of rings of the common arc hanging piece can be set differently according to actual size requirements.

[0023] The beneficial effects of the present invention are as follows: the present invention discloses a segmented inner cylinder with a rectifying device, which is fixed on the hook of the inner cylinder hanging piece, and can realize the transformation of the spiral rising airflow into the axial vertical rising airflow, reduce the kinetic energy loss of the airflow, and greatly reduce the pressure loss; at the same time, the segmented inner cylinder adopts arc-shaped hanging pieces staggered up and down, which is simple and convenient to install, and the gap can be adjusted independently. When problems occur in the local hanging pieces of the inner cylinder, they can be quickly replaced, thereby improving the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a top view of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the fixing seat in the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the top arc hanging piece in the present invention;

[0028] Figure 5 It is a structural schematic diagram of the arc-shaped hanging piece with hook in the present invention;

[0029] Figure 6 It is a structural schematic diagram of the connecting clip 1 in the present invention;

[0030] Figure 7 It is a structural schematic diagram of the second connecting clamp in the present invention;

[0031] Figure 8 It is a structural schematic diagram of the connecting plate 2 in the present invention;

[0032] In the figure, 1 is a fixing seat, 2 is a bolt 1, 3 is a nut 1, 4 is a top arc hanging piece, 5 is a common arc hanging piece, 6 is a connecting clamp 1, 7 is a connecting plate 1, 8 is a hooked arc hanging piece, 9 is a connecting clamp 2, 10 is a connecting plate 2, 11 is a sleeve, 12 is a rectifying blade, 13 is a guide plate, 14 is a connecting plate 1, 15 is a connecting plate 2, 16 is a connecting plate 3, 17 is a bolt 2, 18 is a nut 2, 19 is a washer, and 20 is a reinforcing plate. DETAILED DESCRIPTION

[0033] The specific technical scheme of the present invention is further described in detail below with reference to specific examples.

[0034] As shown in the figure, a sliced ​​inner cylinder with a rectifying device described in the present invention includes a fixing seat 1, a bolt 2, a nut 3, a top arc-shaped hanging piece 4, a common arc-shaped hanging piece 5, a connecting clamp 1 6, a connecting plate 1 7, an arc-shaped hanging piece with a hook 8, a connecting clamp 2 9, a connecting plate 2 10, a sleeve 11, a rectifying blade 12, a guide plate 13, a connecting plate 1 14, a connecting plate 2 15, a connecting plate 3 16, a bolt 2 17, a nut 2 18, a washer 19, and a reinforcing plate 20.

[0035] The fixing seat 1 is evenly fixed on the flange of the cyclone outlet along the circumferential direction by bolts 2 and nuts 3, and the top arc hanging piece 4 is respectively suspended on two adjacent fixing seats 1 through two T-shaped openings at the upper part, and a plurality of top arc hanging pieces 4 are evenly suspended to form the first ring of the inner tube;

[0036] The common arc hanging piece 5 is staggeredly connected with the top arc hanging piece 4 above through a longitudinally arranged connecting clip 1 6 and a connecting plate 1 7;

[0037] Different numbers of common arc-shaped hanging pieces 5 can be set according to actual size requirements, and a certain ring in the middle of the inner tube adopts an arc-shaped hanging piece 8 with a hook.

[0038] The bottom of the inner tube has a common arc hanging piece 5 (lower common arc hanging piece), and the bottom is connected in pairs through a horizontally arranged connecting clip 2 9 and a connecting plate 2 10 to ensure the stability of the inner tube structure;

[0039] The sleeve 11 is installed from top to bottom, and a plurality of hooks with hook arc-shaped hanging pieces 8 are used to support the flange of the sleeve 11 .

[0040] The rectifying blade 12 is in a triangular fan shape and is welded with the guide plate 13 to form a rectifying piece. Three or four rectifying pieces are evenly distributed in the inner cylinder in the same rotation direction. The outer edge of the rectifying piece is welded to the sleeve 11, and the center part and the connecting plate 1 14, the connecting plate 2 15, and the connecting plate 3 16 are connected to each other through the bolt 2 17, the nut 2 18, and the washer 19 to form a whole.

[0041] Two reinforcing plates 20 form a group, one end of which is welded to the hooked arc-shaped hanging piece 8, and the other end is welded closely to the two side surfaces of the rectifier piece, so as to improve the overall strength of the rectifier device.

Claims

1. A sliced ​​inner cylinder with a rectifying device, characterized in that: The invention comprises a fixing seat (1), a bolt (2), a nut (3), a top arc-shaped hanging piece (4), and three layers of common arc-shaped hanging pieces (5) including an upper common arc-shaped hanging piece, a middle common arc-shaped hanging piece, and a lower common arc-shaped hanging piece. The top arc-shaped hanging piece (4) and the three layers of common arc-shaped hanging pieces (upper, middle, and lower) together constitute an inner tube.

2. The segmented inner cylinder with a rectifying device according to claim 1, characterized in that: Two T-shaped openings are arranged on the upper part of the top arc-shaped hanging piece (4), and the top arc-shaped hanging piece (4) is respectively suspended on two adjacent fixing seats (1) through the two T-shaped openings. The fixing seats (1) are evenly fixed on the flange of the cyclone outlet along the circumferential direction through bolts (2) and nuts (3).

3. The segmented inner cylinder with a rectifying device according to claim 2, characterized in that: The upper common arc hanging piece is arranged at the lower end of the top arc hanging piece (4), and a connecting clip (6) and a connecting plate (7) are longitudinally arranged at the connection between the upper common arc hanging piece and the top arc hanging piece (4). The upper common arc hanging piece is staggeredly connected with the top arc hanging piece (4) above it through the longitudinally arranged connecting clip (6) and connecting plate (7).

4. The segmented inner cylinder with a rectifying device according to claim 3, characterized in that: The upper and middle layers of common arc-shaped hanging pieces are connected in an alternating manner via longitudinally arranged connecting clips (6) and connecting plates (7); The middle and lower layers of common arc-shaped hanging pieces are staggeredly connected by longitudinally arranged connecting clips (6) and connecting plates (7); The bottoms of the lower layer common arc-shaped hanging pieces are connected in pairs through two connecting clips (9) and two connecting plates (10) arranged transversely.

5. The segmented inner cylinder with a rectifying device according to claim 3, characterized in that: A plurality of the top arc-shaped hanging pieces (4) form a first ring of the inner tube; The upper common arc-shaped hanging piece and the top arc-shaped hanging piece (4) form a second ring of the inner cylinder; The third ring of the inner cylinder is formed between the upper and middle common arc hanging pieces; The fourth ring of the inner cylinder is formed between the middle and lower layers of common arc hanging pieces; The bottom of the lower common arc hanging piece forms the fifth ring of the inner cylinder.

6. The segmented inner cylinder with a rectifying device according to claim 1, characterized in that: Any middle-layer common arc-shaped hanging piece in the inner tube can adopt an arc-shaped hanging piece with a hook (8); The sleeve (11) is installed from top to bottom, and the hooks arranged on the plurality of hooked arc-shaped hanging pieces (8) are used to support the flange arranged on the sleeve (11).

7. The segmented inner cylinder with a rectifying device according to claim 6, characterized in that: A plurality of triangular fan-shaped rectifying blades (12), a guide plate (13), a first connecting plate (14), a second connecting plate (15), a third connecting plate (16), a second bolt (17), a second nut (18) and a washer (19) are arranged inside the inner cylinder; The rectifying blades (12) and the guide plates (13) are welded to form a rectifying piece, and a plurality of rectifying pieces are evenly distributed in the inner cylinder in the same rotation direction.

8. The segmented inner cylinder with a rectifying device according to claim 7, characterized in that: The outer edge of the rectifier is welded to the sleeve (11), and the central portion is connected to the connecting plate 1 (14), the connecting plate 2 (15), and the connecting plate 3 (16) through the bolt 2 (17), the nut 2 (18) and the corresponding gasket (19) to form a whole.

9. The segmented inner cylinder with a rectifying device according to claim 6, characterized in that: It also includes at least two reinforcing plates (20), the two reinforcing plates (20) forming a group, one end of which is welded to the hooked arc-shaped hanging piece (8), and the other end is respectively welded to the two side surfaces of the rectifier piece.

10. The segmented inner cylinder with a rectifying device according to claim 1, characterized in that: The number of rings of the common arc-shaped hanging piece (5) is set differently according to actual size requirements.

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