Washing apparatus

Abstract

The application provides a washing device, which comprises a washing part, a mixing part and a first stirring assembly. The washing part comprises a bottom wall and a side wall which form a first accommodating cavity. The first accommodating cavity is provided with a first feeding port and a first discharging port. The first feeding port is used for feeding water and ore slurry. The first discharging port is farther away from the bottom wall than the first feeding port. The mixing part is provided with a second accommodating cavity which is communicated with the first discharging port. The second accommodating cavity is provided with a second feeding port and a second discharging port. The second feeding port is used for feeding a flocculating agent and is located between the first accommodating cavity and the second discharging port. The second discharging port is used for discharging the ore slurry mixed with the flocculating agent. The first stirring assembly is used for forward stirring the water and the ore slurry in the first accommodating cavity, so that the cleaned ore slurry flows into the second accommodating cavity. The washing device provided by the application can complete the washing operation of the ore slurry, improve the mixing uniformity of the flocculating agent and the ore slurry, and reduce the mixing shear force of the flocculating agent.

Description

Technical Field

[0001] This application relates to the field of solid-liquid separation technology, specifically to a washing device. Background Technology

[0002] Countercurrent decanting (CCD) is a method for recovering solid particles from suspensions (such as mineral slurries). It typically involves multiple settling tanks connected in series. The process includes: pumping the suspension into the settling tank, adding flocculant dropwise, and then mixing the suspension and flocculant with a mixer to allow the solid particles to settle to the bottom. The clear liquid overflowing from the next settling tank is then fed back into the previous settling tank as a washing solution. When using CCD to treat mineral slurries, the poor flocculant coagulation efficiency can lead to significant material loss, thus negatively impacting the company's economic benefits. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, the present invention aims to provide a washing device that improves the coagulation efficiency of flocculants. Specifically, the washing device improves the mixing uniformity of flocculants and slurry and reduces the mixing shear force of the flocculants. Furthermore, the washing device can also perform slurry washing, allowing larger particles to be removed.

[0004] To solve the above problems, the technical solution adopted by the present invention is as follows:

[0005] A washing device, comprising:

[0006] A washing component, comprising a bottom wall and a side wall, the side wall protruding from the bottom wall to form a first receiving cavity, the first receiving cavity having a first inlet and a first outlet, the first inlet being for feeding water and slurry, and the first outlet being located on the side wall and further away from the bottom wall than the first inlet;

[0007] A mixing component, the mixing component having a second receiving cavity communicating with the first discharge port, the second receiving cavity having a second inlet and a second discharge port, the second inlet being for feeding flocculant and located between the first receiving cavity and the second discharge port, the second discharge port being for discharging slurry mixed with the flocculant; and

[0008] A first stirring assembly is used to forward stir the water and slurry disposed in the first accommodating cavity, so that the washed slurry rises into the second accommodating cavity.

[0009] In some possible implementations, the number of the first feed inlets is at least two, and the at least two first feed inlets are spaced apart. A portion of the first feed inlets are used for water feeding, and another portion of the first feed inlets are used for slurry feeding.

[0010] In some possible implementations, the washing device further includes:

[0011] A guide member, fixed within the first accommodating cavity and located between the first discharge port and each of the first inlets, is provided with:

[0012] The drainage cavity has a first cavity and a second cavity that are connected to each other. The first cavity faces the first discharge port and is connected to the first receiving cavity. The cross-section of the first cavity is an inverted trapezoid. The second cavity faces the bottom wall and is connected to the first receiving cavity. The cross-section of the second cavity is also trapezoidal.

[0013] In some possible implementations, the drainage cavity is further provided with:

[0014] A third cavity is connected between the first cavity and the second cavity, and the cross-section of the third cavity is square.

[0015] In some possible implementations, the washing device further includes:

[0016] A guide member, wherein the guide member is disposed within the first accommodating cavity, and the guide member protrudes from the bottom wall surrounding the first stirring assembly, the guide member comprising:

[0017] A first end face is disposed facing the second cavity and located on the side of each first feed inlet near the bottom wall. When viewed from the first stirring assembly toward the side wall, the first end face is inclined toward the bottom wall.

[0018] The first stirring assembly is also used for counter-stirring, and each of the first feed inlets is located on the side wall.

[0019] In some possible implementations, the guide further includes a second end face facing the first stirring assembly, the second end face being disposed perpendicular to the bottom wall.

[0020] In some possible implementations, the first stirring assembly includes:

[0021] A rotating shaft, which sequentially passes through the first cavity, the third cavity, and the second cavity; and

[0022] At least two agitators are provided at intervals along the extension direction of the rotating shaft. A portion of the agitators are located in the third cavity, and another portion of the agitators are located in the second cavity on the side near the guide member.

[0023] In some possible implementations, the second feed port is positioned away from the bottom wall.

[0024] In some possible implementations, the washing device further includes:

[0025] The feeding component has a third accommodating cavity connected to the second feeding port, and the third accommodating cavity has a third feeding port for feeding the flocculant.

[0026] A control valve, located between the feed member and the mixing member, is used to regulate the outflow rate of the flocculant within the third accommodating chamber; and

[0027] The second stirring assembly is used to stir the flocculant placed in the third accommodating cavity.

[0028] In some possible implementations, the washing component further includes a top wall disposed opposite to the bottom wall and also covering the first receiving cavity.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] Because the first discharge port is farther from the bottom wall than the first inlet, and the first stirring component allows the washed slurry to rise during operation, the washing device of this application can deposit larger particles in the slurry. Furthermore, since the washing device of this application includes a mixing element (in which the washed slurry rises), the flocculant is placed in the mixing element rather than in the first receiving cavity equipped with the first stirring component, thus reducing the shear force on the flocculant. Moreover, because the second inlet (for flocculant feeding) is located between the first receiving cavity and the second discharge port, the rising slurry can propel the flocculant to rapidly diffuse into the slurry within the mixing element, thereby improving the mixing uniformity of the slurry and flocculant in the mixing element. Therefore, the washing device provided by this application improves the flocculant's coagulation efficiency, and when used in a CCD-based settling tank, it can solve the problem of severe material loss caused by CCD separation of slurry.

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0032] Figure 1This is a schematic diagram of the structure of a washing device provided in an embodiment of this application.

[0033] Explanation of icon numbers:

[0034] 100 – Washing device; 10 – Washing component; 11 – Bottom wall; 12 – Side wall; 13 – Top wall; 101 – First accommodating cavity; 102 – First feed inlet; 103 – First discharge outlet; 20 – Mixing component; 21 – Second accommodating cavity; 201 – Second feed inlet; 202 – Second discharge outlet; 30 – First stirring assembly; 31 – Mixer; 32 – Rotating shaft; 33 – Stirring paddle; 40 – Guide component; 41 – First cavity; 42 – Second cavity; 43 – Third cavity; 50 – Guide component; 51 – First end face; 52 – Second end face; 60 – Feeding component; 61 – Third accommodating cavity; 601 – Third feed inlet; 70 – Second stirring assembly; 80 – Control valve. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be noted that when an element is referred to as "fixed to" another element, it may be directly on the other element or there may be an intervening element. When an element is referred to as "connected to" another element, it may be directly connected to the other element or there may be an intervening element. When an element is referred to as "disposed on" another element, it may be disposed on the other element or there may be an intervening element.

[0037] Reference Figure 1 One embodiment of this application provides a washing apparatus 100, which is applicable to the countercurrent decanting (CCD) method for washing and separating mineral slurries. Specifically, the mineral slurry treated by the washing apparatus 100 is used as the feed for the CCD.

[0038] The washing device 100 includes a washing component 10, a mixing component 20, and a first stirring assembly 30. The washing component 10 includes a bottom wall 11 and a side wall 12, with the side wall 12 protruding from the bottom wall 11 to form a first receiving cavity 101. The first receiving cavity 101 has a first inlet 102 and a first outlet 103. The first inlet 102 is used for feeding water and slurry, and the first outlet 103 is located on the side wall 12 and further away from the bottom wall 11 than the first inlet 102. The mixing component 20 has a second receiving cavity 21 communicating with the first outlet 103. The second receiving cavity 21 has a second inlet 201 and a second outlet 202. The second inlet 201 is used for feeding flocculant and is located between the first receiving cavity 101 and the second outlet 202. The second outlet 202 is used for discharging the slurry mixed with flocculant. For example, the central axis of the second accommodating cavity 21 may be perpendicular to the central axis of the first accommodating cavity 101. The flocculant may be a polymeric flocculant, such as polyacrylamide, a polyacrylamide derivative, or a type of galvanic acid. The first stirring assembly 30 is used to forward stir the water and slurry disposed in the first accommodating cavity 101, so that the washed slurry rises into the second accommodating cavity 21. For example, the first stirring assembly 30 may include a bidirectional rotating stirrer 31 (e.g., a bidirectional rotating motor), so that the first stirring assembly 30 can stir both forward (providing the driving force for the upward flow) and reverse (providing the driving force for the downward flow). For example, the stirrer 31 may be disposed outside the first accommodating cavity 101 and opposite to the bottom wall 11, thereby facilitating the improvement of the stacking compactness of the washing device 100.

[0039] The washing device 100 operates as follows: water and slurry are introduced through the first inlet 102, placing them in the first receiving chamber 101. Then, the first stirring component 30 is used to forward-stir the water and slurry to complete the washing step. The washed slurry, under the stirring action of the first stirring component 30, rises to the second receiving chamber 21. Larger particles (e.g., coarse sand) in the slurry may deposit on the bottom wall 11. Next, flocculant is added to the second receiving chamber 21 through the second inlet 201, causing finer particles in the slurry to coagulate. Finally, the slurry with added flocculant is discharged from the second outlet 202. The slurry flowing out of the washing device 100 can be used as feed for a CCD, further coagulating the slurry with added flocculant to complete solid-liquid separation.

[0040] In this application, because the first discharge port 103 is farther from the bottom wall than the first feed port 102, and the first stirring assembly 30 can cause the washed slurry to surge upwards during operation, the washing device 100 of this application can deposit larger particles in the slurry. Furthermore, because the washing device 100 of this application is equipped with a mixing element 20 (in which the washed slurry surges upwards), the flocculant is placed in the mixing element 20 instead of in the first receiving cavity 101 where the first stirring assembly 30 is located, thus reducing the shear force on the flocculant. Moreover, because the second feed port 201 (for feeding the flocculant) is located between the first receiving cavity 101 and the second discharge port 202, the surging slurry can propel the flocculant to quickly diffuse into the slurry within the mixing element 20, thereby improving the mixing uniformity of the slurry and flocculant in the mixing element 20. Therefore, the washing device 100 provided in this application is beneficial to improving the coagulation efficiency of flocculants. Thus, when the washing device 100 provided in this application is connected to a settling tank using CCD, it can solve the problem of severe material loss caused by using CCD to separate slurry.

[0041] In some embodiments, the number of first feed inlets 102 is at least two, and the at least two first feed inlets 102 are spaced apart. A portion of the first feed inlets 102 are used for water feeding, and another portion are used for slurry feeding. In this embodiment, the number of first feed inlets 102 is two. For example, the two first feed inlets 102 can be located at the same vertical height and can also be arranged opposite each other. Providing multiple first feed inlets 102 helps reduce interference between the slurry and water feeding, thereby improving the feeding efficiency of the washing device 100.

[0042] It is understood that in another embodiment, the number of first feed inlets 102 can be one, in which case slurry and water can be fed from the same first feed inlet 102.

[0043] In some embodiments, the washing device 100 further includes a drain member 40, which is fixed within the first receiving cavity 101 and located between the first discharge port 103 and each first inlet port 102. The drain member 40 has a drain cavity (not shown). Exemplarily, the drain member 40 can be fixed to the side wall 12. Exemplarily, the drain member 40 can be fixed to the first receiving cavity 101 by bonding, welding, or integrally forming with the washing device 10. The drain cavity has a first cavity portion 41 and a second cavity portion 42 that communicate with each other. The first cavity portion 41 communicates with the first receiving cavity 101 towards the first discharge port 103. The cross-section of the first cavity portion 41 is an inverted trapezoid, such that the aperture of the first cavity portion 41 gradually increases in the direction toward the first discharge port 10. Exemplarily, the cross-section of the first cavity portion 41 can be an inverted isosceles trapezoid. The second cavity 42 communicates with the first receiving cavity 101 via the bottom wall 11. The cross-section of the second cavity 42 is trapezoidal, such that the aperture of the second cavity 42 gradually decreases along the direction toward the first discharge port 103. For example, the cross-section of the second cavity 42 can be an isosceles trapezoid. The structure of the guide member 40 can prevent the slurry in the second receiving cavity 21 from flowing back into the first receiving cavity 101. Therefore, the structure of the guide member 40 can enhance the stirring effect and further improve the mixing uniformity of the flocculant and the slurry.

[0044] In some embodiments, the drainage cavity is further provided with a third cavity 43, which is connected between the first cavity 41 and the second cavity 42. The cross-section of the third cavity 43 is square (e.g., rectangular or square). The provision of the third cavity 43 further facilitates the prevention of slurry backflow, thereby further facilitating the improvement of the mixing uniformity of flocculant and slurry.

[0045] In some embodiments, the washing device 100 further includes a guide 50, which is disposed within the first receiving cavity 101 and protrudes from the bottom wall 11 surrounding the first stirring assembly 30. The guide 50 includes a first end face 51, which is disposed facing the second cavity 42 and located on the side of each first feed inlet 102 near the bottom wall 11. Viewed from the first stirring assembly 30 towards the side wall 12, the first end face 51 is inclined towards the bottom wall 11. Exemplarily, the first end face 51 may be directionally inclined towards the bottom wall 11. The first stirring assembly 30 is also used for counter-stirring. Each first feed inlet 102 is located on the side wall 12. The cooperation of the guide 50 and the guide member 40 establishes a channel for discharging residual material. Therefore, the cooperation of the guide 50, the guide member 40, the first feed inlet 102, and the first stirring assembly 30 can solve the technical problem of residual material in the dead zone of the washing device 100.

[0046] In some embodiments, the guide member 50 further includes a second end face 52 facing the first stirring assembly 30, the second end face 52 being disposed perpendicular to the bottom wall 11. The angle of the second end face 52 further facilitates the reduction of residual material in dead zones.

[0047] In some embodiments, the first stirring assembly 30 further includes a rotating shaft 32 and at least two stirring paddles 33 (two stirring paddles 33 are shown in the figure). The rotating shaft 32 is connected to the mixer 31 and passes sequentially through the first chamber 41, the third chamber 43, and the second chamber 42. At least two stirring paddles 33 are spaced apart from the rotating shaft 32 along its extension direction. A portion of the stirring paddles 33 are located in the third chamber 43, and another portion of the stirring paddles 33 are located on the side of the second chamber 42 near the guide member 50. Exemplarily, the first stirring assembly 30 can be a propeller-type mixer (the stirring paddles 33 are inclined relative to the rotating shaft 32) or an anchor-type mixer. Exemplarily, the number of stirring paddles 33 can be two, three, or six.

[0048] In another embodiment, the first stirring assembly 30 may be a screw mixer or a ribbon mixer.

[0049] In some embodiments, the washing component 10 further includes a top wall 13, which is disposed opposite to the bottom wall 11 and also covers the first receiving cavity 101. Exemplarily, the agitator 31 may be fixed to the top wall 13.

[0050] In some embodiments, the second feed inlet 201 is oriented away from the bottom wall 11. The orientation of the second feed inlet 201 facilitates the diffusion of flocculant and also improves the ease of feeding the washing device 100.

[0051] In some embodiments, the washing apparatus 100 further includes a feed member 60, a second stirring assembly 70, and a control valve 80. The feed member 60 has a third receiving cavity 61 connected to a second inlet 201, and the third receiving cavity 61 has a third inlet 601 for feeding flocculant. That is, the flocculant enters the third receiving cavity 61 from the third inlet 601 and flows into the second receiving cavity 21 from the second inlet 201. In this embodiment, since the second inlet 201 is oriented away from the bottom wall 11, the flocculant can flow from the third receiving cavity 61 into the second receiving cavity 21 under pressure differential. The control valve 80 is located between the feed member 60 and the mixing member 20 to regulate the outflow rate of the flocculant in the third receiving cavity 61. The second stirring assembly 70 is used to stir the flocculant placed in the third receiving cavity 61. The flocculant can be prepared into a solution within the third receiving cavity 61. It is understood that the second agitation assembly 70 may include a drive unit (e.g., a motor) and an agitator assembly, and the structure of the second agitation assembly 70 may be the same as that of the first agitation assembly 30. The agitator assembly may also be one of a screw agitator, a ribbon agitator, a turbine agitator, or a frame agitator. The arrangement of the feed unit 60, the second agitation assembly 70, and the control valve 80 facilitates the automation of the washing device, thereby reducing the labor intensity of the operator.

[0052] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A washing device, characterized in that, include: A washing component, comprising a bottom wall and a side wall, the side wall protruding from the bottom wall to form a first receiving cavity, the first receiving cavity having a first inlet and a first outlet, the first inlet being for feeding water and slurry, and the first outlet being located on the side wall and further away from the bottom wall than the first inlet; A mixing component, the mixing component having a second receiving cavity communicating with the first discharge port, the second receiving cavity having a second inlet and a second discharge port, the second inlet being for feeding flocculant and located between the first receiving cavity and the second discharge port, the second discharge port being for discharging slurry mixed with the flocculant; and A first stirring assembly is used to forward stir the water and slurry disposed in the first accommodating cavity, so that the washed slurry rises into the second accommodating cavity.

2. The washing device as described in claim 1, characterized in that, The number of the first feed inlets is at least two, and the at least two first feed inlets are spaced apart. A portion of the first feed inlets are used for water feeding, and another portion of the first feed inlets are used for slurry feeding.

3. The washing device as described in claim 1 or 2, characterized in that, The washing device also includes: A guide member, fixed within the first accommodating cavity and located between the first discharge port and each of the first inlets, is provided with: The drainage cavity has a first cavity and a second cavity that are connected to each other. The first cavity faces the first discharge port and is connected to the first receiving cavity. The cross-section of the first cavity is an inverted trapezoid. The second cavity faces the bottom wall and is connected to the first receiving cavity. The cross-section of the second cavity is also trapezoidal.

4. The washing device as described in claim 3, characterized in that, The drainage cavity is also provided with: A third cavity is connected between the first cavity and the second cavity, and the cross-section of the third cavity is square.

5. The washing device as described in claim 4, characterized in that, The washing device also includes: A guide member, wherein the guide member is disposed within the first accommodating cavity, and the guide member protrudes from the bottom wall surrounding the first stirring assembly, the guide member comprising: A first end face is disposed facing the second cavity and located on the side of each first feed inlet near the bottom wall. When viewed from the first stirring assembly toward the side wall, the first end face is inclined toward the bottom wall. The first stirring assembly is also used for counter-stirring to provide a driving force for the downward flow. Each of the first feed inlets is located on the side wall. The cooperation of the guide, the diverting member, the first feed inlet and the first stirring assembly is used to discharge residual material from the dead zone of the washing device.

6. The washing apparatus as described in claim 5, characterized in that, The guide also includes a second end face facing the first stirring assembly, the second end face being perpendicular to the bottom wall.

7. The washing apparatus as described in claim 5, characterized in that, The first stirring assembly includes: A rotating shaft, which sequentially passes through the first cavity, the third cavity, and the second cavity; and At least two agitators are provided at intervals along the extension direction of the rotating shaft. A portion of the agitators are located in the third cavity, and another portion of the agitators are located in the second cavity on the side near the guide member.

8. The washing apparatus as claimed in claim 1, characterized in that, The second feed port is positioned away from the bottom wall.

9. The washing apparatus as described in claim 8, characterized in that, The washing device also includes: The feeding component has a third accommodating cavity connected to the second feeding port, and the third accommodating cavity has a third feeding port for feeding the flocculant. A control valve, located between the feed member and the mixing member, is used to regulate the outflow rate of the flocculant within the third accommodating chamber; and The second stirring assembly is used to stir the flocculant placed in the third accommodating cavity.

10. The washing apparatus as claimed in claim 1, characterized in that, The washing component also includes a top wall, which is disposed opposite to the bottom wall and also covers the first receiving cavity.

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