Tailing thickening device capable of dissipating energy

Abstract

The utility model provides an energy-dissipation tailing thickening device, and belongs to the field of spray drying tower tail gas heat recovery. According to the energy-dissipation tailing thickening device, an energy dissipation device is arranged in a center barrel, and the energy dissipation device comprises one or more combinations of a conical porous flow dividing device and a stepped buffer pipe; the conical porous flow dividing device comprises a flow dividing cavity, a flow dividing opening connected with the bottom end of the flow dividing cavity and a conical flow dividing plate connected with the top end of the flow dividing cavity, and a plurality of holes are formed in the conical flow dividing plate; the kinetic energy of the pumped tail mortar is slowed down step by step, and the tail mortar with slowed kinetic energy flows into the paste storage thickener through the small holes, so that the impact force of the tail mortar on the settlement area is reduced, the energy of dispersing floccules during flocculation is slowed down, and the flocculation effect is improved. Therefore, the flocculating settling effect can be improved on the premise of reducing the flocculating agent, and the output underflow of the thickener is more stable.

Description

Technical Field

[0001] This application relates to the technical field of mine tail waste filling, and particularly relates to an energy-dissipating tailings thickening device. Background Art

[0002] The paste filling mining method has gradually become the development trend of the filling mining method due to its characteristics of no stratification, no segregation, micro water seepage during the transportation process, and no need to add additional dehydration equipment underground. The tailings thickening and dewatering process is an indispensable link in the paste filling process. Adding a flocculant during the tailings thickening process can not only accelerate the sedimentation speed of the tailings slurry but also obtain a higher underflow concentration. Therefore, the flocculation sedimentation technology has been widely used in the preparation process of the paste.

[0003] Currently, a large number of on-site production practice works show that to obtain good flocculation sedimentation effects, it is necessary to ensure that the reaction environment between the flocculant and the tailings slurry is less disturbed. Generally, the more stable the sedimentation area and the thickening area are, the better the final flocculation sedimentation effect is, the more stable the underflow output of the thickener is, and the less flocculant consumed in this process. However, in the actual production process, the low-concentration tailings slurry from the concentrator is pumped to the paste storage thickener by a slurry pump and enters the central barrel at the top of the paste storage thickener through the sand inlet pipe. After the low-concentration tailings slurry is mixed with the flocculant solution in the central barrel, it descends into the thickener bin together. The tailings slurry gushing out from the central barrel will disperse the flocs that undergo flocculation in the sedimentation area and the thickening area, resulting in smaller floc sizes and unstable underflow output of the thickener.

[0004] The reasons for the tailings slurry gushing out from the central barrel to disperse the flocs in the sedimentation area and the thickening area are mainly the following two points: 1. Large initial kinetic energy: When pumping the tailings slurry to the central barrel by a slurry pump, the pressure given by the slurry pump will cause the tailings slurry to carry its own kinetic energy into the central barrel; 2. Large inertia during the descent of the tailings slurry: When the tailings slurry descends from the central barrel into the thickener bin, its density is relatively large, that is, the mass per unit volume is relatively large, resulting in a large inertia generated by the tailings slurry during the free fall process. The stronger the impact force generated when contacting the clarification area in the thickener bin, the more the flocculation state of the suspended particles in the thickener bin is damaged. In order to create a better flocculation environment for the tailings slurry and the flocculant, it is necessary to use additional auxiliary means to dissipate the energy of the tailings slurry to obtain good flocculation sedimentation effects.

[0005] In view of this, it is necessary to design an energy-dissipating tailings thickening device to solve the above problems. Utility Model Content

[0006] In view of the technical problems existing in the background art, the present application provides an energy-dissipating tailings thickening device, which multi-stage reduces the strong kinetic energy of the tailings slurry, not only effectively reduces the interference to the reaction environment of the flocculant and the tailings slurry, but also can reduce the amount of flocculant used when concentrating the tailings slurry, so that the tailings thickening and dewatering process can achieve the effect of emission reduction, which is beneficial to environmental protection.

[0007] An embodiment of the present application provides an energy-dissipating tailings thickening device, including: a paste storage thickener, a central barrel located at the top of the paste storage thickener, a sand inlet pipe with a pipe orifice communicated with the central barrel, and an energy-dissipating device penetrating through the central barrel;

[0008] The energy-dissipating device includes a conical porous flow-dividing device;

[0009] The conical porous flow-dividing device includes a flow-dividing cavity, a flow-dividing orifice connected to the bottom end of the flow-dividing cavity, and a conical flow-dividing plate connected to the top end of the flow-dividing cavity, and a plurality of holes are provided on the conical flow-dividing plate.

[0010] In the technical solution of the embodiment of the present application, by arranging a conical porous flow-dividing device in the central barrel, and a plurality of holes are provided on the conical flow-dividing plate of the conical porous flow-dividing device; when the tailings slurry flows into the conical porous flow-dividing device from the sand inlet pipe, it first flows into the conical flow-dividing plate, so that the kinetic energy of the tailings slurry is slowed down, and the tailings slurry with slowed-down kinetic energy then flows into the paste storage thickener through small holes, thus reducing the impact force on the sedimentation area and slowing down the energy for the flocs to be dispersed during the flocculation process, so that the flocculation sedimentation effect can be improved.

[0011] In some embodiments, the conical flow-dividing plate is located in the cavity of the central barrel; in a top view, the cross-sectional area of the bottom end of the conical flow-dividing plate is equal to the cross-sectional area of the barrel wall of the central barrel. The conical flow-dividing plate can also penetrate through the bottom end of the central barrel; the bottom end of the central barrel is in a closed state.

[0012] In this embodiment, by making the cross-sectional area of the bottom end of the conical flow-dividing plate located in the cavity of the central barrel equal to the cross-sectional area of the barrel wall of the central barrel, or by penetrating the conical flow-dividing plate through the bottom end of the central barrel, when the tailings slurry enters the paste storage thickener from the sand inlet pipe, it can only flow out from the holes of the conical flow-dividing plate, fully dividing the tailings slurry, reducing the mass per unit volume during the free fall process, reducing the inertia generated by the tailings slurry, so as to comprehensively ensure that the kinetic energy of the tailings slurry falling into the paste storage thickener subsequently can be reduced, and further reduce the impact force on the sedimentation area. In addition, the hollow conical flow-dividing plate can divide the tailings slurry flowing out from the cone top, avoiding problems such as poor sedimentation effect of subsequent tailings caused by high-speed jet flow.

[0013] In some embodiments, the energy dissipation device further includes a stepped buffer device; the stepped buffer device includes a stepped buffer pipe; an inlet end of the stepped buffer pipe is connected to an orifice of a sand inlet pipe, and an outlet end of the stepped buffer pipe is located at a bottom end of the central barrel; the stepped buffer pipe communicates with the paste storage thickener.

[0014] In this embodiment, by arranging a stepped buffer pipe connected to the orifice of the sand inlet pipe in the cavity of the central barrel, the tail mortar passes through the stepped buffer pipe with several levels of steps, and the kinetic energy of the tail mortar can be weakened multiple times through the multi-stage elbows of the stepped buffer pipe. In addition, replacing the original diversion of the tail mortar through the wall surface of the central barrel with the direct flow of the stepped buffer pipe can avoid the problem that the wall surface of the central barrel is worn for a long time.

[0015] In some embodiments, the energy dissipation device further includes a stepped buffer device with an inlet end communicating with the orifice of the sand inlet pipe, and a conical porous diversion device arranged below an outlet end of the stepped buffer device; the outlet end of the stepped buffer pipe is located above a top end of the conical diversion plate.

[0016] In this embodiment, by arranging a stepped buffer device connected to the orifice of the sand inlet pipe and a conical porous diversion device arranged below the stepped buffer device, the kinetic energy of the tail mortar is weakened multiple times in sequence before entering the paste storage thickener. In this way, the impact force of the tail mortar on the sedimentation area is further reduced, the energy for flocs to be dispersed during the flocculation process is greatly slowed down, and the flocculation sedimentation effect is further improved.

[0017] In some embodiments, the conical diversion plate is connected to the central barrel by steel bars. A pipe wall of the stepped buffer pipe is connected to the central barrel by steel bars.

[0018] In this embodiment, the conical diversion plate is connected to the central barrel by steel bars; the pipe wall of the stepped buffer pipe is connected to the central barrel by steel bars; both effectively ensure the stability of the device during operation.

[0019] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present application, the drawings used in the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 This is a schematic structural diagram of the tailings thickening device for energy dissipation in the embodiments of the present application;

[0022] Description of the reference numerals in the drawings:

[0023] 1. Paste storage thickener; 2. Central barrel; 3. Sand inlet pipe; 411. Shunt cavity; 412. Shunt port; 413. Conical shunt plate; 414. Hole; 42. Step buffer pipe; 5. Steel bar; 6. Overflow water pipe. Detailed implementation manners

[0024] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is more than two, unless otherwise specifically defined.

[0027] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments may be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0029] In the description of the embodiments of the present application, the term "plurality" means two or more (including two). Similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0030] In the description of the embodiments of the present application, for technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0031] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0032] In the prior art, the sand feeding system of the thickener pumps the tailings slurry into the central barrel 2 through a slurry pump. After mixing the tailings slurry with the flocculant through the central barrel 2, it is directly fed into the thickener bin. This cannot slow down the kinetic energy of the tailings slurry pumped into the central barrel 2, resulting in poor subsequent flocculation and sedimentation effects and consuming more flocculant. Therefore, how to rationally design an energy-dissipating tailings thickening device to effectively relieve the kinetic energy of the pumped tailings is particularly important.

[0033] To solve the above technical problems, the present application provides an energy-dissipating tailings thickening device. Among them, by setting an energy-dissipating device in the central barrel 2, the energy-dissipating device includes one or a combination of a conical porous shunting device and a stepped buffering device, so as to slow down the kinetic energy of the pumped tailings, reduce the interference to the reaction environment of the flocculant and the tailings slurry, and make the underflow output by the thickener more stable.

[0034] For the convenience of description, the following embodiments will be described by taking an energy-dissipating tailings thickening device in an embodiment of the present application as an example.

[0035] Please refer to Figure 1 , Figure 1Schematic structural diagram of an energy-dissipating tailings thickening device provided for the embodiments of the present application, including: a paste storage thickener 1, a central barrel 2 located at the top of the paste storage thickener 1, a sand inlet pipe 3 with a pipe orifice communicating with the central barrel 2, and an energy-dissipating device penetrating through the central barrel 2;

[0036] The energy-dissipating device includes a conical porous flow-dividing device;

[0037] The conical porous flow-dividing device includes a flow-dividing cavity 411, a flow-dividing orifice 412 connected to the bottom end of the flow-dividing cavity 411, and a conical flow-dividing plate 413 connected to the top end of the flow-dividing cavity 411. A number of holes 414 are provided on the conical flow-dividing plate 413;

[0038] The paste storage thickener 1 is divided into a clarification zone, a sedimentation zone located below the clarification zone, and a concentration zone located below the sedimentation zone; the pipe orifice of the overflow water pipe 6, the central barrel 2, and the sand inlet pipe 3 are all located in the clarification zone of the paste storage thickener 1.

[0039] The tailings mortar is pumped into the upper part of the conical flow-dividing plate 413 by the sand inlet pipe 3, mixed with the flocculant in the central barrel 2, and then falls on the conical flow-dividing plate 413, so that the kinetic energy of the tailings mortar is relieved. Subsequently, it enters the clarification zone of the paste storage thickener 1 through the holes 414, undergoes flocculation precipitation, and then enters the sedimentation zone and concentration zone of the paste storage thickener 1 in sequence; at the same time, the overflow water in the clarification zone is discharged through the overflow water pipe 6; before the tailings mortar enters the paste storage thickener 1 from the sand inlet pipe 3, it flows out from the holes 414 of the conical flow-dividing plate 413, fully diverting the tailings mortar, reducing the mass per unit volume during the free-fall process, and reducing the inertia generated by the tailings mortar, so as to ensure that the kinetic energy of the subsequent tailings mortar falling into the paste storage thickener 1 is reduced, thereby reducing the impact force on the sedimentation zone; in addition, the hollow conical flow-dividing plate 413 can divert the tailings mortar flowing out from the cone top, avoiding problems such as poor sedimentation effect of subsequent tailings caused by high-speed jet flow. In this way, the impact force of the tailings mortar on the sedimentation zone is reduced, and the energy of the flocs being dispersed during the flocculation process is slowed down, so that the flocculation sedimentation effect can be improved.

[0040] Further, in the embodiments of the present application, as Figure 1 shown, the conical flow-dividing plate 413 is located in the cavity of the central barrel 2; in a top view, the cross-sectional area of the bottom end of the conical flow-dividing plate 413 is equal to the cross-sectional area of the barrel wall of the central barrel 2; the conical flow-dividing plate 413 can also penetrate through the bottom end of the central barrel 2; the bottom end of the central barrel 2 is in a closed state; in this way, when the tailings mortar enters the paste storage thickener 1 from the sand inlet pipe 3, all of it can only flow out from the holes 414 of the conical flow-dividing plate 413, so as to comprehensively ensure that the kinetic energy of the subsequent tailings mortar falling into the paste storage thickener 1 can be reduced, and further reduce the impact force on the sedimentation zone.

[0041] In some embodiments of the present application, the conical diverter plate 413 may also penetrate through the bottom end of the central barrel 2; the bottom end of the central barrel 2 is in a closed state.

[0042] Further, in the embodiments of the present application, as Figure 1 shown, the energy dissipation device further includes a stepped buffer device; the stepped buffer device includes a stepped buffer pipe 42; the inlet end of the stepped buffer pipe 42 is connected to the pipe orifice of the sand inlet pipe 3, and the outlet end of the stepped buffer pipe 42 is located on the bottom end of the central barrel 2; the stepped buffer pipe 42 is communicated with the paste storage thickener 1; the kinetic energy of the tail mortar can be weakened multiple times through the multi-stage elbows of the stepped buffer pipe 42. In addition, replacing the original diversion of the tail mortar through the wall surface of the central barrel 2 with the direct flow of the stepped buffer pipe 42 can avoid the problem that the wall surface of the central barrel 2 is worn for a long time.

[0043] Further, in the embodiments of the present application, as Figure 1 shown, the energy dissipation device further includes a stepped buffer device with an inlet end communicated with the pipe orifice of the sand inlet pipe 3 and a conical porous diverter device arranged below the outlet end of the stepped buffer device; the outlet end of the stepped buffer pipe 42 is located above the top end of the conical diverter plate 413; in this way, the kinetic energy of the tail mortar is weakened multiple times in sequence before entering the paste storage thickener 1, so as to further reduce the impact force of the tail mortar on the sedimentation area, greatly slow down the energy of the flocs being dispersed during the flocculation process, and further improve the flocculation sedimentation effect.

[0044] Further, in the embodiments of the present application, as Figure 1 shown, the conical diverter plate 413 and the central barrel 2 are connected by steel bars 5, and the pipe wall of the stepped buffer pipe 42 and the central barrel 2 are connected by steel bars 5; in this way, the stability of the device during operation is effectively ensured.

[0045] Please refer to Figure 1, according to one or more embodiments of the present application, the provided energy-dissipating tailings thickening device dissipates energy by arranging an energy-dissipating device in the central barrel 2. The energy-dissipating device includes one or a combination of a conical porous flow-dividing device and a stepped buffer pipe 42. Among them, the conical porous flow-dividing device includes a flow-dividing cavity 411, a flow-dividing port 412 connected to the bottom end of the flow-dividing cavity 411, and a conical flow-dividing plate 413 connected to the top end of the flow-dividing cavity 411. A number of holes 414 are provided on the conical flow-dividing plate 413; the kinetic energy of the pumped tailings mortar is gradually reduced level by level, and the tailings mortar with reduced kinetic energy then flows into the paste storage thickener 1 through small holes 414, thus reducing the impact force of the tailings mortar on the sedimentation area, slowing down the energy for the flocs to be dispersed during the flocculation process, so that the flocculation sedimentation effect can be improved on the premise of reducing the flocculant, and the underflow output by the thickener is made more stable.

[0046] The whole device has a simple structure, is easy to install, and has a low cost. Whether the amount of incoming tailings mortar is large or small, the energy-dissipating efficiency can be effectively guaranteed during sand inlet, and the problems of the flocs in the tailings sedimentation area of the thickener being dispersed and the wall of the central barrel 2 being worn can be effectively solved, and the phenomenon of small flocs formed and poor concentration effect is alleviated.

[0047] It should be noted that the present application is not limited to the above embodiments. The above embodiments are only examples, and embodiments having the same structure and playing the same effect as the technical idea within the technical solution scope of the present application are all included in the technical scope of the present application. In addition, within the scope not departing from the gist of the present application, various modifications that can be thought of by those skilled in the art to the embodiments, and other ways constructed by combining some constituent elements of the embodiments are also included in the scope of the present application.

Claims

1. A tailings thickening device with energy dissipation, characterized in that, Including: A paste storage thickener, a central barrel located at the top of the paste storage thickener, a sand inlet pipe with its pipe orifice communicating with the central barrel, and an energy dissipation device penetrating and arranged in the central barrel; The energy dissipation device includes a conical porous flow splitting device; The conical porous flow splitting device includes a flow splitting cavity, a flow splitting orifice connected to the bottom end of the flow splitting cavity, and a conical flow splitting plate connected to the top end of the flow splitting cavity, and a plurality of holes are arranged on the conical flow splitting plate.

2. The energy-dissipating tailings thickening device according to claim 1, wherein The conical flow splitting plate is located in the cavity of the central barrel; the cross-sectional area of the bottom end of the conical flow splitting plate is equal to the cross-sectional area of the barrel wall of the central barrel.

3. The energy-dissipating tailings thickening device according to claim 1, wherein, The conical flow splitting plate can also penetrate through the bottom end of the central barrel; the bottom end of the central barrel is in a closed state.

4. The energy-dissipating tailings thickening device according to claim 1, wherein The energy dissipation device further includes a stepped buffer device; the stepped buffer device includes a stepped buffer pipe; the inlet end of the stepped buffer pipe is connected to the pipe orifice of the sand inlet pipe, and the outlet end of the stepped buffer pipe is located on the bottom end of the central barrel; the stepped buffer pipe communicates with the paste storage thickener.

5. The energy-dissipating tailings thickening device according to claim 4, wherein, The energy dissipation device further includes a stepped buffer device with its inlet end communicating with the pipe orifice of the sand inlet pipe, and a conical porous flow splitting device arranged below the outlet end of the stepped buffer device; the outlet end of the stepped buffer pipe is located above the top end of the conical flow splitting plate.

6. The energy-dissipating tailings thickening device according to claim 1, characterized in that, The conical flow splitting plate is connected to the central barrel by steel bars.

7. The energy-dissipating tailings thickening device according to claim 4, characterized in that, The pipe wall of the stepped buffer pipe is connected to the central barrel by steel bars.

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