Double-base-cone concentration cyclone

Abstract

The utility model discloses a double-base-cone concentration cyclone, and belongs to the technical field of coal washing. Comprising a cylindrical section of a cylindrical structure, an outer conical section of a funnel structure is arranged below the cylindrical section, an underflow opening is formed in the lowermost portion of the outer conical section, a feeding opening is formed in the uppermost portion of the side wall of the cylindrical section, and an overflow opening is formed in the top of the cylindrical section; an inner conical section with the angle different from that of the outer conical section is arranged in the cylindrical section, the inner conical section and the outer conical section are arranged up and down to form a double-conical structure, an inner bottom flow opening of the inner conical section is coaxial with a bottom flow opening of the outer conical section, and the inner bottom flow opening of the inner conical section is larger than the bottom flow opening of the outer conical section. The double-bottom-cone structure is adopted, so that the settling area of slime water materials is increased, the underflow concentration is increased, and the performance of a concentration cyclone is improved.

Description

Technical Field

[0001] This utility model belongs to the field of coal washing and beneficiation technology, specifically relating to a double-bottom cone thickener hydrocyclone. Background Technology

[0002] Coal slurry water treatment is a crucial step in coal preparation plant processes. Coal slurry water is typically treated using a thickening-filtration process. Thickening equipment generally consists of thickeners and hydrocyclones. Thickeners primarily use gravity settling, requiring a large footprint, and the underflow concentration is typically around 500 g / L. Due to mechanical limitations, it's difficult to further increase the underflow concentration. Conventional hydrocyclones employ a small cone angle and long cone section structure, achieving higher underflow concentrations, but their processing capacity is limited. Increasing the processing capacity of hydrocyclones requires further increasing the hydrocyclone diameter, but this significantly reduces centrifugal strength and increases the power of the feed pump.

[0003] Existing technology CN204182497U discloses a heavy medium thickener hydrocyclone, including an outer cylinder and a thickening tank. The outer cylinder has a feed pipe and a middlings outlet pipe on its side wall. Inside the outer cylinder is a central pipe connected to the middlings outlet pipe. Inside the central pipe is a concentrate outlet pipe that passes through the outer cylinder. The inner walls of the outer cylinder and the central pipe are provided with spiral-shaped turbulence bands. A cone is located at the lower end of the outer cylinder. The thickening tank is connected to the underflow port at the lower end of the cone. An inclined feed port that passes through the side wall of the thickening tank is located on a straight pipe at the bottom of the underflow port. A spiral discharge mechanism is located at the bottom of the thickening tank. Its structure is complex, and although it uses two central pipes, it does not effectively increase the settling area or the underflow concentration. Utility Model Content

[0004] To address the shortcomings of existing technologies, a double-bottom cone hydrocyclone is provided. It has a simple structure and effectively increases the settling area by setting a double cone structure, thereby improving the processing capacity and concentration effect of the hydrocyclone.

[0005] To achieve the above technical objectives, this utility model discloses a double-bottom-cone hydrocyclone concentrator, comprising a cylindrical section with a cylindrical structure, an outer conical section with a funnel structure below the cylindrical section, an underflow port at the bottom of the outer conical section, an inlet at the top of the side wall of the cylindrical section, and an overflow port at the top of the cylindrical section; the cylindrical section has an inner conical section with an angle different from that of the outer conical section, and the inner and outer conical sections are arranged vertically to form a double conical structure, the inner underflow port of the inner conical section is coaxial with the underflow port of the outer conical section, and the inner underflow port of the inner conical section is larger than the underflow port of the outer conical section.

[0006] Furthermore, the top of the inner conical section is the middle of the cylindrical section, the bottom of the inner conical section is close to the outer conical section, and there is space between the periphery of the inner conical section and the inner wall of the cylindrical section to allow material flow.

[0007] Furthermore, the height of the inner conical section is 0.6-0.8 times the diameter of the cylindrical section.

[0008] Furthermore, the inner conical section has spiral patterns inside.

[0009] Furthermore, the inner conical section is fixed inside the cylindrical section by thin brackets around its perimeter.

[0010] Furthermore, the cone angle of the outer conical section is 120°-150°.

[0011] Furthermore, the cone angle of the inner conical section is 30°-60°.

[0012] Furthermore, the underflow orifice of the inner conical section is larger than the underflow orifice, being 1.1-1.2 times larger. The distance between the cross-section of the inner underflow orifice and the cross-section of the underflow orifice is equal to the diameter of the underflow orifice of the inner conical section.

[0013] Beneficial effects: The hydrocyclone of this utility model includes two conical structures, which allows the underflow inside the hydrocyclone to pass through both sides and settle successively, thereby effectively increasing the settling area of ​​the coal slurry material. At the same time, the two conical structures have different angles, which further increases the underflow concentration and improves the performance of the thickening hydrocyclone. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the double-bottom cone concentrator hydrocyclone of this utility model;

[0015] In the diagram: A - inlet, B - overflow, C - cylindrical section, D - inner conical section, E - outer conical section, F - underflow outlet. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings:

[0017] like Figure 1 As shown, this utility model provides a double-bottom cone cyclone concentrator with a double-bottom cone structure, including a cylindrical section C with a cylindrical structure, an outer cone section E with a funnel structure below the cylindrical section C, a bottom outlet F at the bottom of the outer cone section E, a feed inlet at the top of the side wall of the cylindrical section C, and an overflow outlet B at the top of the cylindrical section C; the interior of the cylindrical section C has an inner cone section D with an angle different from that of the outer cone section E, and the inner cone section D and the outer cone section E are arranged vertically to form a double cone structure, the double cone structures are in the same direction, but the angles of the cone structures are different;

[0018] The height of the inner conical section D is 0.6-0.8 times the diameter of the cylindrical section C;

[0019] The inner bottom outlet of the inner conical section D is coaxial with the bottom outlet F of the outer conical section E, but the inner bottom outlet of the inner conical section D is larger than the bottom outlet F of the outer conical section E. The inner conical section D has spiral patterns inside. The inner conical section D is fixed to the cylindrical section C by thin supports on all four sides.

[0020] The outer conical section E has a cone angle of 120°-150°; the inner conical section D has a cone angle of 30°-60°. The diameter of the bottom inlet of the inner conical section D is 1.1-1.2 times the diameter of the bottom inlet F of the outer conical section E. The outer conical section E contains the fluid swirling along the outer wall of the cylindrical section C and part of the bottom flow from the inner conical section D. The distance between the cross-section of the inner bottom inlet of the inner conical section D and the cross-section of the bottom inlet F is equal to the diameter of the bottom inlet of the inner conical section D. The double-bottom-cone structure increases the settling area of ​​the coal slurry water, increases the underflow concentration, and improves the performance of the thickening hydrocyclone.

[0021] Working principle: After the coal preparation plant slurry is pumped to the inlet A of the double-bottom cone thickener, the slurry is divided into overflow and underflow under the action of centrifugal force. The overflow moves upward and is eventually discharged through the overflow pipe B. The underflow is divided into a swirling part along the wall and a swirling part inside the inner cone under the action of the inner cone body D. The swirling part along the wall enters the outer cone section E, while the underflow formed in the inner cone body D enters the outer cone section E for further concentration. Finally, both parts are discharged through the underflow outlet F. The double-bottom cone enhances the underflow concentration efficiency of the hydrocyclone and further increases the underflow concentration.

Claims

1. A double-bottom cone concentrator hydrocyclone, characterized in that: It includes a cylindrical section (C) with a cylindrical structure, an outer conical section (E) with a funnel structure below the cylindrical section (C), a bottom outlet (F) at the bottom of the outer conical section (E), a feed inlet at the top of the side wall of the cylindrical section (C), and an overflow outlet (B) at the top of the cylindrical section (C). Inside the cylindrical section (C) is an inner conical section (D) with a different angle than the outer conical section (E). The inner conical section (D) and the outer conical section (E) are arranged vertically to form a double conical structure. The inner bottom outlet of the inner conical section (D) is coaxial with the bottom outlet (F) of the outer conical section (E). The inner bottom outlet of the inner conical section (D) is larger than the bottom outlet (F) of the outer conical section (E).

2. The double-bottom cone concentrator hydrocyclone according to claim 1, characterized in that: The top of the inner conical section (D) is the middle of the cylindrical section (C), and the bottom of the inner conical section (D) is close to the outer conical section (E). There is space between the inner conical section (D) and the inner wall of the cylindrical section (C) to allow material flow.

3. The double-bottom cone concentrator hydrocyclone according to claim 2, characterized in that: The height of the inner conical section (D) is 0.6-0.8 times the diameter of the cylindrical section (C).

4. The double-bottom cone concentrator hydrocyclone according to claim 1, characterized in that: The inner conical section (D) has a spiral pattern inside.

5. The double-bottom cone concentrator hydrocyclone according to claim 1, characterized in that: The inner conical section (D) is fixed inside the cylindrical section (C) by thin brackets around its perimeter.

6. The double-bottom cone concentrator hydrocyclone according to claim 1, characterized in that: The cone angle of the outer conical segment (E) is 120°-150°.

7. The double-bottom cone concentrator hydrocyclone according to claim 1, characterized in that: The cone angle of the inner conical segment (D) is 30°-60°.

8. The double-bottom cone concentrator hydrocyclone according to claim 1, characterized in that: The underflow outlet of the inner conical section (D) is larger than that of the underflow outlet (F). The underflow outlet of the inner conical section (D) is 1.1-1.2 times larger than that of the underflow outlet (F). The distance between the cross-section of the inner underflow outlet and the cross-section of the underflow outlet (F) is equal to the diameter of the underflow outlet of the inner conical section (D).

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