Tailing floc crushing device capable of preventing external flow type hydrodynamic cavitation

Abstract

The utility model discloses an anti-outflow type hydrodynamic cavitation tailing floc crushing device which comprises a feeding pipe, the feeding pipe is of a gradually-shrunk structure, and the small-diameter end of the feeding pipe is coaxially and fixedly connected with a throat pipe; the end, with the smaller diameter, of the feeding pipe is inserted into one end of the diffusion pipe, the feeding pipe and the diffusion pipe are coaxially arranged, air suction ports are formed in the outer wall of the diffusion pipe in the circumferential direction at equal intervals, and one-way air inlet sealing pieces are installed in the air suction ports. The discharging pipe is connected to the other end of the diffusion pipe in an inserted mode, the discharging pipe and the throat pipe are coaxially and correspondingly arranged, and a gap is formed between the discharging pipe and the throat pipe; wherein the feeding pipe, the throat pipe and the discharging pipe are integrally formed. The hydrodynamic cavitation venturi tube is simple in structure and convenient to operate, external power and medicament consumption are not needed, and compared with a traditional hydrodynamic cavitation venturi tube, the problem that ore pulp is sprayed out from the air suction port of the diffusion section due to internal pressure loss when the hydrodynamic cavitation venturi tube is shut down or breaks down can be solved through the inward air inlet sealing piece in the hydrodynamic cavitation venturi tube.

Description

Technical Field

[0001] This utility model relates to the field of tailings treatment technology, and in particular to a tailings floc crushing device for preventing outflow and hydraulic cavitation. Background Technology

[0002] Flocculation-sedimentation thickening-dewatering is a common technique for dry tailings discharge in mineral processing plants. During the flocculation and sedimentation stage, inorganic and organic flocculants are added to increase the apparent particle size of the tailings particles, forming flocs. Under gravity, the tailings flocs settle to form the underflow from the thickener. This underflow is a high-concentration slurry, typically transported via pipeline to filtration equipment for dewatering and then discharged dry. However, the organic polymer flocculants added to the slurry during the flocculation and sedimentation stage form large flocs through entrapment and sweeping. These flocs have a loose, not dense, structure. While they settle well in the thickener, they often trap a large amount of water during filtration and dewatering. The colloids formed by residual flocculants and tailings particles can also clog the filter cloth pores, leading to low filtration rates and excessively high filter cake moisture content. Therefore, it is necessary to develop equipment or a process to solve the tailings filtration and dewatering problem.

[0003] Shearing and crushing can significantly reduce floc size, disrupt the structure of polymeric flocculants, reduce floc porosity, and to some extent improve the fractal dimension and density of flocs. Increased floc density significantly improves filtration and dewatering efficiency and reduces filter cake moisture. The hydraulic cavitation process in a Venturi tube creates a low-pressure, high-velocity state, generating cavitation bubbles. When the slurry enters this high-pressure, low-velocity region, extremely high temperatures and strong pressure waves are generated. These extreme physical environments lead to floc breakage and degradation of organic flocculants, thereby enhancing the filtration and dewatering efficiency of the thickener underflow tailings slurry. Therefore, designing a floc crushing device based on a Venturi tube is feasible.

[0004] Based on the above principle, this utility model provides a tailings floc crushing device for preventing outflow and hydraulic cavitation. Utility Model Content

[0005] The purpose of this invention is to provide a tailings floc crushing device that prevents outflow and hydraulic cavitation, in order to solve the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a tailings floc crushing device for preventing outflow and hydraulic cavitation, comprising:

[0007] The feed pipe has a tapered structure, and the smaller diameter end of the feed pipe is coaxially and fixedly connected to a throat.

[0008] A diffuser tube is provided, with the smaller diameter end of the feed tube inserted into one end of the diffuser tube. The feed tube and the diffuser tube are coaxially arranged. The outer wall of the diffuser tube is provided with air intake ports at equal intervals around the circumference, and a one-way air intake seal is installed in the air intake port.

[0009] A discharge pipe is inserted into the other end of the diffuser pipe. The discharge pipe and the throat pipe are coaxially corresponding and are spaced apart.

[0010] The feed pipe, the throat pipe, and the discharge pipe are integrally formed.

[0011] According to the tailings floc crushing device for preventing outflow and hydraulic cavitation provided by this utility model, the one-way air inlet seal includes a one-way soft rubber sealing ring, the air inlet is fixedly connected to an air inlet pipe, and the one-way soft rubber sealing ring is installed inside the air inlet pipe.

[0012] According to the tailings floc crushing device for preventing outflow and hydraulic cavitation provided by this utility model, the length of the feed pipe is 100mm-150mm.

[0013] According to the tailings floc crushing device for preventing outflow and hydraulic cavitation provided by this utility model, the inner diameter of the throat pipe is 5mm-15mm; the ratio of the inner diameter of the throat pipe to the inner diameter of the discharge pipe is 1:7.

[0014] According to the tailings floc crushing device for preventing outflow and hydraulic cavitation provided by this utility model, the height of the air inlet pipe is 5-20mm and the inner diameter is 5-10mm.

[0015] According to the tailings floc crushing device for preventing outflow and hydraulic cavitation provided by this utility model, the inner diameter of the larger diameter end of the feed pipe is equal to the inner diameter of the feed pipe.

[0016] The present invention discloses the following technical effects:

[0017] In use, this device is installed on the underflow slurry pipeline of the thickener between the thickener tank and the filtration equipment. The slurry, after flocculation and sedimentation, enters the device under a certain pressure through the feed pipe. As the pipe diameter decreases at the throat, the flow velocity increases and the pressure decreases, creating a negative pressure (Venturi effect) inside the diffuser. At this time, under the action of external pressure, the one-way air inlet seal opens, allowing gas or liquid to enter. When the pipeline malfunctions or the equipment stops, the negative pressure in the diffuser disappears, and the one-way air inlet seal closes. This solves the problem of slurry spraying out from the air intake of the diffuser section due to internal pressure loss when the equipment stops or malfunctions.

[0018] This invention has a simple structure and is easy to operate, requiring no external power or reagent consumption.

[0019] Compared to traditional hydraulic cavitation venturi tubes, the one-way air inlet seal in this invention can solve the problem of slurry being ejected from the diffuser section air intake due to internal pressure loss during shutdown or malfunction.

[0020] For high-concentration tailings slurry treated with flocculants, hydraulic cavitation treatment can not only destroy the floc structure and expose the water inside the floc, solving the problem of high filter cake specific resistance caused by the floc wrapping water during tailings slurry filtration, but also form micro-nano bubbles on the surface of tailings particles, improving the permeability of the filter cake during the filtration stage, helping to reduce the moisture content of the filter cake, and achieving dry tailings discharge. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of the tailings floc crushing device for preventing outflow and hydraulic cavitation according to this utility model.

[0023] Figure 2 This is an isometric view of the tailings floc crushing device for preventing outflow and hydraulic cavitation according to this utility model;

[0024] Figure 3 This is a flowchart of the tailings treatment process of this utility model.

[0025] Among them, 1. throat tube; 2. one-way soft rubber sealing ring; 3. diffuser tube; 4. discharge tube; 5. feed tube. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Reference Figures 1-3 This utility model provides a tailings floc crushing device for preventing outflow and hydraulic cavitation, comprising:

[0029] Feed pipe 5 has a tapered structure, and the smaller diameter end of feed pipe 5 is coaxially fixedly connected to throat 1.

[0030] The smaller diameter end of the feed pipe 5 is inserted into one end of the diffuser tube 3. The feed pipe 5 and the diffuser tube 3 are coaxially arranged. The outer wall of the diffuser tube 3 is provided with air intake ports at equal intervals around the circumference. A one-way air intake seal is installed in the air intake port.

[0031] The discharge pipe 4 is inserted into the other end of the diffuser pipe 3. The discharge pipe 4 and the throat pipe 1 are coaxially corresponding and there is a gap between the discharge pipe 4 and the throat pipe 1.

[0032] Among them, the feed pipe 5, throat pipe 1, and discharge pipe 4 are integrally formed.

[0033] In use, this device is installed on the underflow slurry pipeline of the thickener between the thickener tank and the filtration equipment. The slurry, after flocculation and sedimentation, enters the device through the feed pipe 5 at a certain pressure. After passing through the throat pipe 1, the pipe diameter decreases, the flow velocity increases, and the pressure decreases, creating a negative pressure (Venturi effect) inside the diffuser pipe 3. At this time, under the action of external pressure, the one-way air inlet seal opens, and gas or liquid enters. When the pipeline malfunctions or the equipment stops, the negative pressure in the diffuser pipe 3 disappears, and the one-way air inlet seal closes. This can solve the problem of slurry spraying out from the air intake of the diffuser section due to internal pressure loss when the equipment stops or malfunctions.

[0034] Further optimization of the design includes a one-way soft rubber sealing ring 2. An air intake pipe is fixedly connected to the intake port, and the one-way soft rubber sealing ring 2 is installed inside the intake pipe. The one-way soft rubber sealing ring 2 is connected via a socket joint, a compression fitting, or a grooved connection. The one-way soft rubber sealing ring 2 utilizes existing technology (such as rubber stoppers for medical bottles). Because this invention requires one-way conduction, it is improved by being tapered, with the pointed end facing the diffuser tube 3. It is formed by four tapered pieces bonded together, and reinforcing ribs are provided on the inner arc surface of the tapered pieces.

[0035] The design was further optimized so that the length of feed pipe 5 is 100mm-150mm.

[0036] Further optimization of the design: the inner diameter of throat 1 is 5mm-15mm; the ratio of the inner diameter of throat 1 to the inner diameter of discharge pipe 4 is 1:7.

[0037] Further optimization of the design resulted in an intake pipe height of 5-20mm and an inner diameter of 5-10mm.

[0038] The scheme was further optimized so that the inner diameter of the larger diameter end of the feed pipe 5 was equal to the inner diameter of the feed pipe 5.

[0039] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A tailings floe breaking device for preventing external flow type hydrodynamic cavitation, characterized by, The utility model relates to a kind of air intake pipe, including: Feed pipe (5), the feed pipe (5) is tapered structure, the smaller diameter end of the feed pipe (5) is coaxially fixedly connected with throat pipe (1); Diffusion pipe (3), the smaller diameter end of the feed pipe (5) is inserted in one end of the diffusion pipe (3), the feed pipe (5) is coaxially arranged between the diffusion pipe (3), the outer wall of the diffusion pipe (3) is opened with suction port in equal interval, one-way air inlet sealing element is installed in the suction port; Discharge pipe (4), the discharge pipe (4) is inserted in the other end of the diffusion pipe (3), the discharge pipe (4) is coaxially arranged between the throat pipe (1) correspondingly, and interval is arranged between the discharge pipe (4) and the throat pipe (1); Wherein, the feed pipe (5), the throat pipe (1), the discharge pipe (4) are integrally formed.

2. A device for breaking tailings floc according to claim 1, characterized in that: The one-way air inlet sealing element includes one-way soft rubber sealing ring (2), the suction port is fixedly connected with air inlet pipe, and the one-way soft rubber sealing ring (2) is installed in the air inlet pipe.

3. A device for breaking tailings floc according to claim 1, characterized in that: The length of the feed pipe (5) is 100mm-150mm.

4. A device for breaking tailings floc according to claim 1, characterized in that: The inner diameter of the throat pipe (1) is 5mm-15mm; the ratio of the inner diameter of the throat pipe (1) and the inner diameter of the discharge pipe (4) is 1:

7.

5. A device for breaking tailings floc according to claim 2, characterized in that: The height of the air inlet pipe is 5-20mm, and the inner diameter is 5-10mm.

6. A device for breaking tailings floc according to claim 1, characterized in that: The inner diameter of the larger diameter end of the feed pipe (5) is equal to the inner diameter of the feed pipe (5).

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