Three-product dense medium cyclone

Abstract

The utility model provides a three-product dense medium cyclone, and particularly relates to the technical field of dense medium cyclones. The cyclone comprises a first-section cyclone, a connecting pipe and a second-section cyclone, an inner cavity of the first-section swirler is communicated with an inner cavity of the second-section swirler through a connecting pipe; a first structure avoiding position is arranged on the side wall of the second barrel corresponding to the lower part of the connecting pipe; a second structure avoiding position is arranged on the bottom wall of the connecting pipe close to the side wall of the second barrel; the side wall of the second barrel and the bottom wall of the connecting pipe are tightly connected through the first structure receding part and the second structure receding part through an arc-shaped transition plate. According to the three-product dense medium cyclone, the arc-shaped transition plate is additionally arranged at the joint of the two-section cyclone and the connecting pipe in the three-product dense medium cyclone, so that material rebound and energy loss are reduced, the operation energy consumption of equipment is remarkably reduced, and the separation efficiency of the equipment is improved; the lining ceramic blocks are arranged on the inner side walls of all the components of the three-product dense medium cyclone, so that the overall abrasion resistance of equipment is improved, the service life of the equipment is prolonged, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to heavy medium cyclone technical field, concretely relates to a three-product heavy medium cyclone. BACKGROUND

[0002] Since the 1970s, heavy medium cyclone has become the main selection equipment of coal preparation plant in China, and has been widely used in metallurgy, petroleum chemical industry and other fields. With the expansion of industrial production scale, the requirements of cyclone in improving separation efficiency, reducing energy consumption and reducing maintenance cost are increasingly improved.

[0003] The working principle of heavy medium cyclone is based on Archimedes principle and centrifugal field, and the separation of high and low density materials is realized through separation cone surface theory. After the raw material enters the cyclone, the high-density material at the separation interface will move outward to the center, enter the outer spiral flow and rise or fall, and be discharged from the underflow port; and the material with density lower than the separation interface moves to the center, enters the inner spiral flow and rises after falling, and is discharged from the overflow port, thereby completing the separation process.

[0004] The structural characteristics of the three-product heavy medium cyclone include that the first-stage cyclone adopts a cylindrical design, so that the density field is uniform, the density increases in a cylindrical manner from the center to the cylinder wall, the suspension density is stable, and the separation precision is high; the second-stage cyclone adopts a cylindrical-conical design, which is beneficial to expanding the density difference of two-stage separation, realizing high-density separation, and realizing online adjustment of the second-stage separation density by combining the change of the second-stage underflow port diameter and the adjustment of the second-stage overflow pipe insertion depth.

[0005] In order to improve the separation precision of the three-product heavy medium cyclone, etc., the first-stage and second-stage feeding pipes are made into involute (OSI), and a right-angle transition is generated at the junction of the involute and the cylinder. The second-stage feeding comes from the first-stage underflow port, and mainly separates middlings and gangue. The middlings and gangue with large density will impact the right-angle platform part at high speed, in addition, the impurities such as iron mixed in will produce vortex and difficult to discharge, causing serious wear at the part, reducing the service life of the second-stage cyclone, shortening the replacement cycle, and affecting production. UTILITY MODEL CONTENTS

[0006] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a three-product heavy medium cyclone, and the specific technical solutions are as follows:

[0007] The utility model provides a three-product heavy medium cyclone, including a section cyclone, connecting pipe and two section cyclone, the inner chamber of a section cyclone and the inner chamber of two section cyclone are communicated through connecting pipe, and the connecting pipe is arranged on the outer lateral wall of a section cyclone and two section cyclone and is close to the position of top end, the first cylinder body of a section cyclone is provided with raw coal feeding pipe in the central position of top, and the bottom center position of first cylinder body is provided with clean coal overflow pipe, and the outer lateral wall of first cylinder body is provided with medium feeding pipe along tangential direction in the position close to bottom end, and two section cyclone includes second cylinder body, conical body, underflow port and arc transition plate, and the bottom of second cylinder body is located conical body, and the bottom of conical body is located underflow port, and the top center position of second cylinder body is provided with overflow pipe, and the lateral wall of second cylinder body is provided with first structural accommodation in correspondence with the position below connecting pipe, and the bottom wall of connecting pipe is provided with second structural accommodation in the position close to the lateral wall of second cylinder body, and first structural accommodation and second structural accommodation are closely connected with the lateral wall of second cylinder body and the bottom wall of connecting pipe through arc transition plate.

[0008] Preferably, the cross section of the arc transition plate is triangular, and the included angle of the base angle of the triangular is 5-22.5°; the top end surface of the arc transition plate is adapted to the cross section size of the second structural accommodation.

[0009] Preferably, the diameter of the first cylinder body is 1200mm, and the diameter of the second cylinder body is 850mm.

[0010] Preferably, the cross section size of the medium feeding pipe is 140mm*140mm-350mm*350mm, and the diameter of the inlet thereof is 400mm; the diameter of the raw coal feeding pipe and the clean coal overflow pipe is 240mm-480mm.

[0011] Further preferably, the taper angle of the conical body is 10-45°.

[0012] Further preferably, the diameter of the underflow port is 64mm-224mm, and the diameter of the overflow pipe is 320mm.

[0013] Further preferably, the connecting pipe is connected with the lateral wall of the first cylinder body and the second cylinder body in the connecting mode of involute, and the cross section size of the connecting pipe is 128mm*128mm-320mm*320mm.

[0014] Further preferably, the inner lateral wall of the first cylinder body, the medium feeding pipe, the raw coal feeding pipe, the clean coal overflow pipe, the second cylinder body, the conical body, the underflow port, the connecting pipe, the overflow pipe and the arc transition plate are provided with ceramic blocks.

[0015] Further preferably, the second cylinder body and the conical body, and the conical body and the underflow port are connected through flanges.

[0016] The utility model discloses the beneficial effect is:

[0017] 1. Traditional heavy medium cyclone is in processing large flow material, because of the limitation on design, energy consumption is higher, especially in high density material processing process, cyclone needs to consume more energy to maintain high speed rotation and separation effect, and the utility model discloses the arc transition plate is added to the connecting place of its two-stage cyclone and connecting pipe, reduces the rebound and energy loss of material, significantly reduces the operation energy consumption of equipment, improves the separation efficiency of equipment, more effectively solves the problem that the step is formed to the connecting place of traditional two-stage cyclone connecting pipe and cylinder with the involute form, and the iron and other impurities mixed in coal are easy to cause vortex accumulation in step part, difficult to discharge.

[0018] 2. The utility model discloses the inside wall of each component of one stage cyclone and two stage cyclone is provided with the lining ceramic block, compared with the traditional rubber, polyurethane and other lining materials that are easy to age in high temperature, high pressure environment, the service life of lining ceramic block is prolonged 2 to 3 times, improves the wear resistance and service life of the whole equipment, reduces the maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings accompanying the specification of this application serve to provide further understanding of the present application, and do not constitute an improper limitation on the present application.

[0020] Figure 1 It is the whole structure schematic view of the utility model;

[0021] Figure 2 It is the sectional view of the utility model;

[0022] Figure 3 (a) is the structure schematic view of two stage cyclone of the utility model;

[0023] Figure 3 (b) is the bottom view of two stage cyclone of the utility model;

[0024] Figure 4 (a) and Figure 4 (b) are the contrast schematic view of traditional two stage cyclone and two stage cyclone of the utility model;

[0025] In the drawing, 1-first cylinder;2-medium feeding pipe;3-raw coal feeding pipe;4-clean coal overflow pipe;5-second cylinder;6-conical body;7-underflow port;8-connecting pipe;9-overflow pipe;10-arc transition plate. DETAILED DESCRIPTION

[0026] The specific implementation of the three-product heavy medium cyclone provided by the utility model is further described in combination with the drawings and examples.

[0027] As shown in the drawings, a three-product heavy medium cyclone comprises a first cyclone, a connecting pipe 8 and a second cyclone; the inner cavity of the first cyclone and the inner cavity of the second cyclone are communicated through the connecting pipe 8, and the connecting pipe 8 is arranged on the outer side wall of the first cyclone and the second cyclone and close to the top end. Figures 1-2 Preferably, the first cyclone comprises a first cylinder 1, the top center of the first cylinder 1 is provided with a raw coal feeding pipe 3, the bottom center of the first cylinder 1 is provided with a clean coal overflow pipe 4, and the outer side wall of the first cylinder 1 close to the bottom end is provided with a medium feeding pipe 2 in tangential direction.

[0028] Preferably, the second cyclone comprises a second cylinder 5, a conical body 6, an underflow port 7 and an arc-shaped transition plate 10; the conical body 6 is located at the bottom of the second cylinder 5; the underflow port 7 is located at the bottom of the conical body 6; the top center of the second cylinder 5 is provided with an overflow pipe 9; the side wall of the second cylinder 5 is provided with a first structure recess corresponding to the lower part of the connecting pipe 8; the bottom wall of the connecting pipe 8 is provided with a second structure recess close to the side wall of the second cylinder 5; the first structure recess and the second structure recess tightly connect the side wall of the second cylinder 5 and the bottom wall of the connecting pipe 8 through the arc-shaped transition plate 10, and the traditional right-angle step of the second cyclone is replaced by a feeding channel with chamfered structure to avoid material accumulation.

[0029] Preferably, the cross section of the arc-shaped transition plate 10 is triangular, the included angle of the bottom angle of the triangular is 5°-22.5°, and the top end surface of the arc-shaped transition plate is matched with the cross section size of the second structure recess.

[0030] Preferably, the diameter of the first cylinder 1 is 1200mm, and the diameter of the second cylinder 5 is 850mm.

[0031] Preferably, the cross section size of the medium feeding pipe 2 is 140mm×140mm-350mm×350mm, and the diameter of the inlet thereof is 400mm; the diameter of the raw coal feeding pipe 3 and the clean coal overflow pipe 4 is 240mm-480mm.

[0032] Preferably, the taper angle of the conical body 6 is 10°-45°.

[0033] Preferably, the diameter of the underflow port 7 is 64mm-224mm, and the diameter of the overflow pipe 9 is 320mm.

[0034] Preferably, the diameter of the underflow port 7 is 64mm-224mm, and the diameter of the overflow pipe 9 is 320mm.

[0035] Further preferably, the connecting pipe 8 is connected to the side wall of the first cylinder 1 and the second cylinder 5 in a involute manner, wherein the cross-sectional dimension of the connecting pipe 8 is 128mm*128mm-320mm*320mm.

[0036] It is worth mentioning that the inner side wall of the first cylinder 1, the medium feeding pipe 2, the raw coal feeding pipe 3, the clean coal overflow pipe 4, the second cylinder 5, the cone body 6, the underflow port 7, the connecting pipe 8, the overflow pipe 9 and the arc-shaped transition plate 10 are all provided with ceramic lining blocks, which can effectively resist the erosion and friction of the material, thereby prolonging the service life of the cyclone.

[0037] Further preferably, the second cylinder 5 and the cone body 6, and the cone body 6 and the underflow port 7 are connected through flanges.

[0038] In operation, the material and the heavy suspension enter the first-stage cyclone from the medium feeding pipe 2 along the tangent direction of the side wall of the first cylinder 1, and the raw coal enters along the axis from the raw coal feeding pipe 3 by gravity; under the action of centrifugal force, the material with a density greater than that of the heavy suspension moves to the side wall of the first cylinder 1, moves upward under the action of the axial velocity of the outer spiral flow, and enters the second-stage cyclone along the tangent direction through the connecting pipe 8; the material with a density less than that of the heavy suspension tends to the air column, and is discharged from the clean coal overflow pipe 4 along the central inner spiral line; the heavy medium with a higher density and a larger particle size after being concentrated in the first-stage cyclone enters the second-stage cyclone along with the high-density material in the first-stage cyclone, and under the action of centrifugal force, the high-density material with a density greater than that of the heavy suspension moves to the side wall of the second-stage cyclone, is discharged from the underflow port 7 under the action of the axial velocity of the outer spiral flow, and the medium-density material with a density less than that of the heavy suspension tends to the air column, and is discharged upward from the overflow pipe 9 along the central inner spiral line, thereby completing the separation process.

[0039] As shown in Figure 3 The present application changes the right-angle design between the inner wall of the cylinder of the traditional two-stage cyclone and the connecting pipe 8 into an arc-shaped transition plate 10 to form a chamfered structure: first, it solves the problem that the traditional two-stage cyclone has a high energy consumption when processing a large amount of material due to the design limitation, especially in the process of processing high-density material, the two-stage cyclone needs to consume more energy to maintain high-speed rotation and separation effect; second, it solves the problem that the right-angle design of the traditional two-stage cyclone is one of the main reasons for the short-circuit flow phenomenon; third, the arc-shaped transition plate 10 design weakens the phenomenon of material accumulation at the step formed by the original right-angle design, ensures that the material can smoothly enter the inside of the two-stage cyclone from the connecting pipe 8, and thereby reduces the turbulence and improves the separation efficiency of the cyclone.

[0040] In the utility model, the terms such as "upper", "lower", "bottom", "top" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely the relationship words determined for the convenience of describing the structural relationship of the components or elements of the utility model, and are not specific to the components or elements of the utility model, and should not be understood as the limitation of the utility model. The terms such as "connected", "connected" and the like should be understood in a broad sense, which means that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For the relevant scientific research or technical personnel in the field, the specific meaning of the above terms in the utility model can be determined according to the specific circumstances, and should not be understood as the limitation of the utility model.

[0041] Of course, the above description is not a limitation of the utility model, and the utility model is also not limited to the above examples. The changes, modifications, additions or replacements made by the technical personnel in the technical field within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. A three-product dense medium cyclone characterised in that, It comprises a first cyclone, a connecting pipe and a second cyclone. The inner cavity of the first cyclone and the inner cavity of the second cyclone are communicated through the connecting pipe; the connecting pipe is arranged on the outer side wall of the first cyclone and the second cyclone and is close to the top end position. The first cyclone comprises a first cylinder, a raw coal feeding pipe is arranged at the top center position of the first cylinder, a clean coal overflow pipe is arranged at the bottom center position of the first cylinder, and a medium feeding pipe is arranged at the position close to the bottom end of the outer side wall of the first cylinder in a tangential direction. The second cyclone comprises a second cylinder, a conical body, an underflow port and an arc-shaped transition plate; the conical body is located at the bottom of the second cylinder; the underflow port is located at the bottom of the conical body; and an overflow pipe is arranged at the top center position of the second cylinder. A first structure accommodating position is arranged on the side wall of the second cylinder corresponding to the position below the connecting pipe; a second structure accommodating position is arranged on the bottom wall of the connecting pipe close to the position of the side wall of the second cylinder; and the first structure accommodating position and the second structure accommodating position tightly connect the side wall of the second cylinder and the bottom wall of the connecting pipe through the arc-shaped transition plate.

2. The triple-product dense medium cyclone according to claim 1, characterised in that, The cross section of the arc-shaped transition plate is triangular, and the included angle of the bottom angle of the triangular shape is 5°-22.5°. The top end surface of the arc-shaped transition plate is adapted to the cross-sectional dimension of the second structure accommodating position.

3. The triple-product dense medium cyclone according to claim 1, characterized in that, The diameter of the first cylinder is 1200mm; and the diameter of the second cylinder is 850mm.

4. The triple-product dense medium cyclone of claim 1, wherein, The cross-sectional dimension of the medium feeding pipe is 140mm*140mm-350mm*350mm, and the diameter of the inlet thereof is 400mm. The diameter of the raw coal feeding pipe and the clean coal overflow pipe is 240mm-480mm.

5. The triple-product dense medium cyclone of claim 1, wherein, The taper angle of the conical body is 10°-45°.

6. The triple-product dense medium cyclone of claim 1, wherein, The diameter of the underflow port is 64mm-224mm; and the diameter of the overflow pipe is 320mm.

7. The triple-product dense medium cyclone of claim 1 wherein, The connecting pipe is connected with the side walls of the first cylinder and the second cylinder in a involute connection mode, and the cross-sectional dimension of the connecting pipe is 128mm*128mm-320mm*320mm.

8. The triple-product dense medium cyclone according to claim 2, characterised in that, The inner side walls of the first cylinder, the medium feeding pipe, the raw coal feeding pipe, the clean coal overflow pipe, the second cylinder, the conical body, the underflow port, the connecting pipe, the overflow pipe and the arc-shaped transition plate are all provided with ceramic blocks.

9. The triple-product dense medium cyclone of claim 1 wherein, The second cylinder and the conical body, and the conical body and the underflow port are connected through flanges.

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