Inclined plate type grading cyclone

Abstract

The utility model provides an inclined plate type grading cyclone, and belongs to the technical field of coal washing. Comprising a cylindrical section of a columnar structure, a square column section with the section of a rectangular structure is arranged above the cylindrical section, an overflow opening is formed in the top of the square column section, a funnel-shaped conical section is arranged below the cylindrical section, and an underflow opening is formed in the lowest portion of the conical section. A plurality of inclined plates with irregular structures are embedded in the square column section; each interference settlement plate is of a transversely-arranged herringbone structure, and the multiple interference settlement plates are arranged in the same direction to form a fishbone-shaped structure. Coarse particle materials can rapidly settle and return to the grading cyclone to be graded through the inclined plate, so that multiple grading is achieved, coarse particle mismatching substances are reduced, the fine screening treatment capacity is high, and other equipment is not needed for further grading.

Description

Technical Field

[0001] This utility model belongs to the field of coal washing and beneficiation technology, specifically relating to an inclined plate classifier hydrocyclone. Background Technology

[0002] Classifying hydrocyclones are mainly used in coal preparation plants for classifying coarse coal slime, and the classification effect has a significant impact on flotation and coal slime water treatment. As a classifying and control device, the overflow of the classifying hydrocyclone generally enters the flotation stage. The upper limit for flotation particle size is 0.5mm, and in actual operation, the upper limit for feed particle size is generally required to not exceed 0.25mm. Therefore, reducing the amount of coarse material flowing out of the classifying hydrocyclone overflow is an important aspect of improving flotation operations in coal preparation plants. Currently, coal preparation plants mainly reduce coarse particles in the flotation feed by changing the underflow orifice size of the classifying hydrocyclone or using fine screens. However, adjusting the underflow orifice structure affects the underflow particle size distribution, and fine screens have limited processing capacity and require a large number of units.

[0003] Existing technology CN118477765A discloses a high-precision classifying hydrocyclone, comprising a cylindrical section and a conical section of the hydrocyclone distributed vertically, forming a hollow cavity. An external overflow pipe is provided at the top of the cylindrical section, and an underflow pipe is provided at the bottom of the conical section. A feed channel is connected to the side wall of the cylindrical section, and an internal overflow pipe, connected to the external overflow pipe, is located inside the cylindrical section. The internal overflow pipe includes a straight overflow pipe and an umbrella-shaped guide plate. Screen holes are opened on the side wall of the straight overflow pipe, and the guide plate is located at the bottom of the straight overflow pipe, with a ring-shaped cover structure that is smaller at the top and larger at the bottom. This structure is complex, has high production costs, and is ineffective in reducing overflow and coarse flow. Furthermore, the umbrella-shaped guide plate is prone to clogging and requires timely unclogging; otherwise, it will affect continuous operation. Utility Model Content

[0004] To address the shortcomings of existing technologies, an inclined plate classifier is provided. It has a simple structure and uses multiple irregularly structured interference settling plates set in a square section to effectively reduce the probability of mismatch of coarse particles overflowing from the classifier, improve the classification efficiency of the classifier, and ensure the effect of subsequent flotation operations.

[0005] To achieve the above technical objectives, this utility model discloses an inclined plate type classifier hydrocyclone, including a cylindrical section with a columnar structure, a square column section with a rectangular cross-section above the cylindrical section, an overflow port at the top of the square column section, a funnel-shaped conical section below the cylindrical section, an underflow port at the bottom of the conical section, and a feed inlet on the side wall of the cylindrical section. Multiple irregularly structured inclined plates are embedded inside the square column section.

[0006] Furthermore, the inclined plate is an interference settlement plate, which is a horizontally arranged herringbone structure. Multiple interference settlement plates are arranged in the same direction to form a fishbone structure, and the multiple interference settlement plates of the fishbone structure are located in the upper middle part inside the square column section.

[0007] Furthermore, the interference settling plates are neatly arranged inside the entire square column section, thereby dividing the internal space of the square column section into multiple irregular flow channels.

[0008] Furthermore, the feed inlet is located at the top of the cylindrical section, and the feed inlet is tangentially connected to the side wall of the cylindrical section.

[0009] Furthermore, all interference settlement plates are set at equal intervals, with the spacing between adjacent interference settlement plates being 3cm-5cm; the included angle of the interference settlement plates with a herringbone structure is 90°-120°.

[0010] Furthermore, the height of the square column segment is the same as the height of the cylindrical segment, and the side length of the square column segment is 1.5 times the diameter of the cylindrical segment.

[0011] Beneficial effects: This device sets up a square column section above the cylindrical section connected to the feed inlet. The square column section contains multiple interference settling plates with the same structure. The interference settling plates are arranged in an irregular or herringbone structure, which causes the coarse particles that are mismatched in the overflow of the traditional classifying hydrocyclone to settle rapidly in the inclined plate structure and return to the classifying hydrocyclone for multiple classifications, reducing the amount of mismatched coarse particles and further improving the efficiency of coal classification; it has a strong fine screening capacity and does not require other equipment for further classification. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the inclined plate classifier hydrocyclone of this utility model;

[0013] Figure 2 This is a schematic diagram of the structure between the internal interference settlement plates in this utility model.

[0014] In the diagram: A - inlet, B - overflow outlet, C - interference settling plate, D - square column section, E - cylindrical section, F - conical section, G - underflow outlet, H - spacing between inclined plates, I - angle between inclined plates. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings:

[0016] like Figure 1 As shown, this utility model patent provides an inclined plate type grading cyclone device, which includes a square column section D, a cylindrical section E, and a conical section F arranged vertically. The height of the square column section D is the same as the height of the cylindrical section E, and the side length of the square column section D is 1.5 times the diameter of the cylindrical section E.

[0017] The cylindrical section E is located in the middle of the device. An inlet A, tangentially intersecting the upper part of the side wall of cylindrical section E, is provided on the upper part of the cylindrical section E. The lower part of cylindrical section E connects to the top of the conical section F, which has a funnel structure. A bottom outlet G is provided at the bottom of the conical section F. A square column section D is located at the top of cylindrical section E. Multiple irregularly shaped inclined plates are embedded inside the square column section D. These inclined plates are herringbone-shaped interference settling plates C, arranged in a fishbone pattern. The herringbone angle of the interference settling plates C is 90°-120°, and the vertical spacing between adjacent interference settling plates C is 3cm-5cm. The interference settling plates are neatly arranged inside the entire square column section, thus dividing the internal space of the square column section into multiple irregular flow channels.

[0018] Working principle: After the coal preparation plant slurry is pumped to the inlet A of the inclined plate classifier hydrocyclone, it is divided into an overflow portion and an underflow portion under the action of centrifugal force. The overflow enters the square column section D, which has an inclined plate inside. Under the deceleration and guiding effect of the inclined plate, the sediment in the overflow returns to the cylindrical section E. The function of the inclined plate is to settle the coarse particles in the overflow of the hydrocyclone and reduce the mismatch rate of coarse particles in the overflow.

Claims

1. An inclined plate-type classification cyclone, characterised in that: The structure includes a cylindrical section (E) with a columnar structure, a square column section (D) with a rectangular cross-section above the cylindrical section (E), an overflow port (B) at the top of the square column section (D), a funnel-shaped conical section (F) below the cylindrical section (E), and a bottom flow port (G) at the bottom of the conical section (F). The cylindrical section (E) has a feed inlet (A) on its side wall, and the square column section (D) has multiple irregularly shaped inclined plates embedded inside.

2. The inclined plate classifier cyclone according to claim 1, characterized in that: The inclined plate is an interference settlement plate (C), which is a herringbone structure arranged horizontally. Multiple interference settlement plates (C) are arranged in the same direction in a fishbone structure. The multiple interference settlement plates (C) in the fishbone structure are located in the upper middle part inside the square column section (D).

3. The inclined plate classifier cyclone according to claim 2, characterized in that: The interference settling plates (C) are neatly arranged inside the entire square column section (D), thereby dividing the internal space of the square column section (D) into multiple irregular flow channels.

4. The inclined plate classifier cyclone according to claim 1, characterized in that: The feed inlet (A) is located on the upper part of the cylindrical section (E), and the feed inlet (A) is tangential to the side wall of the cylindrical section (E).

5. The inclined plate classifier cyclone according to claim 2, characterized in that: All interference settlement plates (C) are set at equal intervals, and the distance (H) between adjacent interference settlement plates (C) is 3cm-5cm; the included angle (I) of the interference settlement plates (C) with herringbone structure is 90°-120°.

6. The inclined plate classifier cyclone according to claim 2, characterized in that: The height of the square prism segment (D) is the same as the height of the cylindrical segment (E), and the side length of the square prism segment (D) is 1.5 times the diameter of the cylindrical segment (E).

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