Archimedes spiral feeding system for efficient thickener

Abstract

An Archimedes spiral feeding system for an efficient thickener can effectively solve the problem that an existing thickener is low in solid-liquid separation efficiency and comprises a central feeding well and a feeding device, and the feeding device is composed of a feeding straight pipe, a supernate lifting pump, an Archimedes spiral chute and a flocculating agent feeding pipe. The straight feeding pipe is communicated with the Archimedes spiral chute, a through pipe body is arranged at the position, right facing a central shaft of the supernatant lifting pump, of the Archimedes spiral chute, a spiral blade is arranged on the central shaft of the supernatant lifting pump, the Archimedes spiral chute inclines downwards from an inlet to an outlet, and the outlet end of the Archimedes spiral chute is tangentially connected with the outer side wall of the central feeding well. The feeding system of the high-efficiency thickener has the advantages that the structure is simple, novel and unique, the use effect is good, the production efficiency is improved, the feeding system is suitable for industrial production, the feeding system of the high-efficiency thickener is an innovation, and the economic and social benefits are remarkable.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical field, especially an Archimedes spiral feeding system for high -efficient thickener. BACKGROUND

[0002] The high -efficient thickener is a kind of concentration and clarification equipment of continuous work, mainly used for the dehydration of concentrate and tailings in wet beneficiation operation, also widely used in the concentration and purification of solid-containing slurry in coal, steel, chemical industry, building material, water source and sewage treatment industry.

[0003] The feeding system is the important working part of thickener, solid-liquid suspension first enters the feeding system of thickener, dilutes to the most suitable concentration in the feeding system, dissipates part kinetic energy, mixes with flocculating agent fully, then enters the main sedimentation zone of thickener from each direction of the bottom of feeding system and carries out sedimentation.The trace distribution of suspension, solid volume fraction distribution and kinetic energy dissipation in feeding system are directly related to the solid-liquid separation effect of thickener as a whole, and these characteristics are influenced by the structure of thickener feeding system;

[0004] The traditional thickener feeding system is a cylindrical structure, and the suspension is given from the upper central part of the feeding system, which will inevitably form a jet flow near the feeding system device, so that the flow rate of the suspension center in the thickener is large to the periphery, the ore slurry cannot be fully deposited, and the already deposited material will also be affected by the new material, reducing the efficiency of solid-liquid separation.In view of the shortcomings of the traditional feeding system, people have been committed to researching new high -efficient feeding system device, and there are many feeding systems now, such as: the Amco high -efficient thickener feeding system device adds a stirrer in the feeding system, so that the flocculating agent and ore slurry can be fully mixed, and the flocculation effect is good, but the energy consumption is also increased;The feeding system device of the Dole high -efficient thickener divides the feed into two opposite directions, which provides favorable conditions for the effective mixing of material and flocculating agent;There is also a new type of bell-shaped feeding system device, which can effectively dissipate the kinetic energy of the feed, and evenly distribute the material.The above feeding system devices have been used in the production and manufacture of thickener, but due to the problems in structure, the solid-liquid separation efficiency of thickener is low, therefore, designing a feeding system device with reasonable structure is crucial to the solid-liquid separation efficiency of thickener. CONTENT OF THE UTILITY MODEL

[0005] In view of the above situation, in order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide an Archimedes spiral feeding system for high -efficient thickener, which can effectively solve the problem of low solid-liquid separation efficiency of existing thickener.

[0006] The utility model relates to an archimedes screw feeding system for high -efficient thickener, including central feeding well and feeding device, feeding device is by feeding straight pipe, supernatant pumping, archimedes screw chute and flocculating agent feeding pipe constitute, the discharge port of feeding straight pipe is linked together with the feeding end of archimedes screw chute, the central shaft of archimedes screw chute is opposite supernatant pumping, is equipped with the pipe body that links together archimedes screw chute and the inside of thickener tank with, the central shaft lower end of supernatant pumping is equipped with spiral blade in pipe body, constitute the structure of the supernatant in thickener tank and inhale into archimedes screw chute, archimedes screw chute is from the import to the export and presents the downward inclination, and its export end and the outside wall of central feeding well are tangentially connected, constitute the tangential feeding structure with the inside of central feeding well, the first flocculating agent feeding pipe (N1) that adds flocculating agent to tank body is equipped with in the upper of archimedes screw chute, the second flocculating agent feeding pipe (N2) that adds flocculating agent to well is arranged in the upper of central feeding well, constitute archimedes screw feeding structure.

[0007] The utility model discloses the simple novel unique structure of being scientific and reasonable, easy production, and good use effect, long life, improve production efficiency, and suitable for industrial production, it is the innovation on high -efficient thickener feeding system, and there is remarkable economic and social benefits. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 It is the structure front view (partially cut open) of the utility model.

[0009] Figure 2 It is the structure plan view (not show supernatant pumping 2) of the utility model.

[0010] Figure 3 It is the installation and use state diagram of the utility model. DETAILED DESCRIPTION

[0011] The specific embodiment of the utility model is explained in detail in the following in combination with the drawings and specific circumstances.

[0012] By Figures 1-2As shown in the utility model, a kind of Archimedes spiral feeding system for high-efficiency thickener, including central feeding well 4 and feeding device, the feeding device is by feeding straight pipe 1, supernatant pumping pump 2, Archimedes spiral chute 3 and flocculating agent feeding pipe constitute, the discharge port of feeding straight pipe 1 is connected with the feeding end of Archimedes spiral chute 3, Archimedes spiral chute 3 is opposite the central shaft of supernatant pumping pump 2, is equipped with the pipe body 2-1 that Archimedes spiral chute 3 is connected with the inside of thickener tank 6, the central shaft lower end of supernatant pumping pump 2 is inserted into the spiral blade 2-2 equipped with pipe body 2-1, constitute the structure that the supernatant in thickener tank 6 is inhaled into Archimedes spiral chute 3, Archimedes spiral chute 3 is from import to export downwardly inclined, and its outlet end is tangentially connected with the outside wall of central feeding well 4, constitute the tangential feeding structure inside central feeding well 4, Archimedes spiral chute 3 is equipped with the first flocculating agent feeding pipe (N1) 5-1 for adding flocculating agent into tank, the second flocculating agent feeding pipe (N2) 5-2 for adding flocculating agent into well is placed on the top of central feeding well 4, constitute Archimedes spiral feeding structure.

[0013] To ensure the use effect and use convenience, the bottom of Archimedes spiral chute 3 is inclined, which facilitates the material entering the central feeding well 4 through Archimedes spiral chute 3.

[0014] The side wall of Archimedes spiral chute 3 is provided with vertical reinforcing ribs 3-1.

[0015] The Archimedes spiral chute 3 is provided with a plurality of vertical lifting arms 8 for lifting, and the Archimedes spiral chute 3 is lifted on the lifting frame 7.

[0016] The pipe body 2-1 is trumpet-shaped, which facilitates the supernatant in the thickener tank 6 being pumped into the Archimedes spiral chute 3 by the supernatant pumping pump 2.

[0017] When the thickener is used, the utility model is used to replace the original feeding system, and the Archimedes spiral chute 3 is lifted on the lifting frame 7 through the vertical lifting arm 8, which is very convenient to use. Figure 3 As shown in the utility model, the specific working condition is: by reforming the structure of the traditional thickener feeding system, an Archimedes spiral feeding system for high-efficiency thickener is proposed, and the computational fluid dynamics method is used to simulate the flow field inside the Archimedes spiral feeding system, to study the trajectory distribution, outlet plane solid volume fraction distribution and velocity distribution in the new feeding system, and to provide technical support for the industrial application of the new feeding system.

[0018] The utility model discloses a high-efficiency thickener feeding system, which comprises a feeding straight pipe, a supernatant pumping pump, an Archimedes spiral chute, a central feeding well and a flocculant adding pipe.

[0019] The feeding pipe adopts an Archimedes spiral structure, and the flow field analysis verification optimization can effectively guide the flow of fluid and reduce energy loss, so that the flocculant and the material can be optimally mixed and diluted.

[0020] The material enters the central feeding well tangentially through the Archimedes spiral pipe, which is beneficial to the mixed liquid to become a stable cyclone rapidly. The cyclone field distribution formed after the liquid enters the inner cylinder is more reasonable and orderly, and the centrifugal speed is improved. After the liquid leaves the inner cylinder, the radial speed is greater than the tangential inlet radial speed, and the liquid radial transport capacity is improved. The flocculant is added into the feeding system through N1 and N2 respectively.

[0020] The field application and test show that the effect is very good, the high-efficiency thickener can effectively realize solid-liquid separation, the medicine material is fully mixed, energy consumption is reduced, and the feeding system is used in a 30m high-efficiency thickener. The flocculant consumption is reduced by more than 20%. If the flocculant consumption of an alumina plant is 500g / t of alumina, the flocculant consumption of the feeding system can be reduced to 100g / t of alumina. For an alumina plant with an annual output of 2 million tons, the flocculant consumption can be saved by 200 tons per year, which is about 2 million yuan per year. The red mud treatment capacity is 390-400t / h, the material feeding capacity is 1700-4100m³ / h, the washing water suspension is 200ppm, the bottom flow solid content is 38-45% (weight percentage), the last washing sedimentation tank bottom flow alkali loss is ≤5kg / t-dry red mud, the feeding system material and flocculant uniformity coefficient is ≥98%, the dilution solid content is 80-100g / L, and the effect is good. The existing thickener feeding equipment cannot be compared, and it is a great innovation in the thickener feeding equipment, which has great economic and social benefits.

Claims

1. An Archimedes screw feed system for a high efficiency thickener comprising a central feedwell (4) and a feed device characterised in that, The feeding device is composed of a feeding straight pipe (1), a supernatant feeding pump (2), an Archimedes spiral chute (3) and a flocculating agent feeding pipe, the discharge port of the feeding straight pipe (1) is communicated with the feeding end of the Archimedes spiral chute (3), the Archimedes spiral chute (3) is opposite to the central shaft of the supernatant feeding pump (2), a pipe body (2-1) connecting the Archimedes spiral chute (3) with the thickener tank body (6) is arranged at the Archimedes spiral chute (3), the central shaft lower end of the supernatant feeding pump (2) extends into the pipe body (2-1) and is provided with a spiral blade (2-2), thereby forming a structure for sucking the supernatant in the thickener tank body (6) into the Archimedes spiral chute (3), the Archimedes spiral chute (3) is downwardly inclined from the inlet to the outlet, and the outlet end is tangentially connected with the outer side wall of the central feeding well (4), thereby forming a tangential feeding structure inside the central feeding well (4), the Archimedes spiral chute (3) is provided with a first flocculating agent feeding pipe (5-1) above the Archimedes spiral chute (3) for adding flocculating agent into the tank body, the central feeding well (4) is provided with a second flocculating agent feeding pipe (5-2) above the central feeding well (4) for adding flocculating agent into the well, thereby forming an Archimedes spiral feeding structure.

2. An Archimedes screw feed system for a high efficiency thickener according to claim 1, characterised in that, The bottom of the Archimedes spiral chute (3) is inclined, so that the material can be conveniently fed into the central feeding well (4) through the Archimedes spiral chute (3).

3. The Archimedes screw feed system for a high rate thickener according to claim 1, wherein, The sidewall of the Archimedes spiral chute (3) is provided with vertical reinforcing ribs (3-1).

4. The Archimedes screw feed system for a high rate thickener according to claim 1, wherein, The Archimedes spiral chute (3) is provided with a plurality of vertical lifting arms (8) for lifting, and the Archimedes spiral chute (3) is lifted on the lifting frame (7).

5. The Archimedes screw feed system for a high rate thickener according to claim 1, wherein, The pipe body (2-1) is trumpet-shaped, so that the supernatant in the thickener tank body (6) can be conveniently fed into the Archimedes spiral chute (3) by the supernatant feeding pump (2).

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