Center cylinder structure of thickener

Abstract

The utility model discloses a thickener center cylinder structure, and relates to the technical field of thickeners, a spiral flow guide channel and a mixed flow sedimentation cavity are formed in a center cylinder, the outlet end of the flow guide channel is connected with the mixed flow sedimentation cavity, the center cylinder is provided with a plurality of flocculant spray pipes obliquely cutting into the flow guide channel from outside to inside, and the flocculant spray pipes are connected with the flow guide channel. The liquid flow direction of the flocculant spray pipe and the liquid flow direction of the flow guide channel form back flushing, the flow guide channel is provided with a plurality of impellers, and the impellers are impacted by the liquid flow of the flow guide channel to rotate. The flow velocity of the tailing slurry and the flocculating agent entering the mixed flow settling cavity can be reduced, and the tailing slurry and the flocculating agent can be fully mixed, so that the settling effect is remarkably improved, and the settling effect is better.

Description

Technical Field

[0001] This application relates to the technical field of thickeners, and particularly to a central barrel structure of a thickener. Background Art

[0002] The commonly used filling aggregate in metal mines is tailings (or tailings, including classified tailings and full tailings). The main filling process flow is that the tailings with a relatively low mass concentration (generally 10 - 20%, 40 - 45% when passing through a high - efficiency thickener) from the concentrator are pumped to the sand bin of the filling preparation station or a deep - cone thickener, flocculated and concentrated to a higher concentration (about 60 - 70%), and then discharged into the mixing system, mixed with the gelling material (the gelling material can be not added during non - cemented filling), forming qualified filling slurry, which is self - flowed or pumped to the place to be filled through boreholes and underground filling pipelines.

[0003] In the existing deep - cone thickeners, since the mortar enters the central barrel at a high speed and with a large impact force, the mixing time period of the mortar and the flocculant is short and the mixing is uneven, which affects the sedimentation effect. Utility Model Content

[0004] The main purpose of this application is to provide a central barrel structure of a thickener, aiming to solve the above - mentioned technical problems.

[0005] The technical solution adopted in this application is as follows:

[0006] A central barrel structure of a thickener, in which a spiral diversion channel and a mixed - flow sedimentation chamber are formed inside the central barrel. The outlet end of the diversion channel is connected to the mixed - flow sedimentation chamber. The central barrel is provided with a number of flocculant spray pipes obliquely cutting into the diversion channel from the outside to the inside. The liquid flow direction of the flocculant spray pipe forms a counter - impact with the liquid flow direction of the diversion channel. The diversion channel is provided with a number of impellers, and the impellers are rotated by the impact of the liquid flow in the diversion channel.

[0007] Optionally, a flocculant addition pipe is arranged at the bottom of the central barrel, and the flocculant addition pipe is connected to each flocculant spray pipe one by one.

[0008] Optionally, the impeller includes a wheel shaft and blades. The wheel shaft is rotatably installed in the diversion channel, and the blades are circumferentially distributed on the wheel shaft.

[0009] Optionally, a number of flow - down baffles are arranged in a circumferential array on the inner wall of the mixed - flow sedimentation chamber, and adjacent two flow - down baffles are arranged in a high - low staggered manner.

[0010] Optionally, the mixed - flow sedimentation chamber is arranged in a conical shape.

[0011] Compared with the prior art, the beneficial effect of this application is:

[0012] First: A thickener central cylinder structure proposed in the embodiments of the present application. A spiral diversion channel and a mixed-flow velocity reduction chamber are arranged in the central cylinder. The feeding path of the tail mortar is extended through the spiral diversion channel, and in the feeding path of the tail mortar, a flocculant spray pipe injects the flocculant into the tail mortar in multiple segments along the feeding path of the tail mortar, realizing uniform and more sufficient mixing of the flocculant and the tail mortar. In addition, the flocculant spray pipe is obliquely cut into the diversion channel, so that the liquid flow direction of the flocculant spray pipe forms a counterflush with the liquid flow direction of the diversion channel, which not only reduces the liquid flow velocity in the diversion channel, but also enables the flocculant to fully contact and be uniformly mixed with the tail mortar.

[0013] Second: A thickener central cylinder structure proposed in the embodiments of the present application. A rotatable impeller is arranged in the diversion channel. The tail mortar impacts the impeller, which can not only reduce the flow velocity of the tail mortar, but also stir the flocculant and the tail mortar by the rotation of the impeller, enabling the two to fully contact and be uniformly mixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the thickener central cylinder structure provided by the embodiments of the present application from one perspective;

[0015] Figure 2 is a schematic structural diagram of the thickener central cylinder structure provided by the embodiments of the present application from another perspective.

[0016] DESCRIPTION OF THE REFERENCE NUMERALS IN THE DRAWINGS:

[0017] 100 - central cylinder, 101 - diversion channel, 102 - inlet end, 103 - outlet end, 104 - mixed-flow sedimentation chamber, 105 - flocculant spray pipe, 106 - flocculant addition pipe, 107 - impeller, 108 - flow reduction baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0019] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0020] In this application, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can 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 components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of this application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0022] Referring to the attached Figures 1 to 2 , the embodiment of this application provides a thickener central cylinder structure. A spiral diversion channel 101 and a mixed-flow sedimentation chamber 104 are formed inside the central cylinder 100. The inlet end 102 of the diversion channel 101 is connected to the tailings slurry injection pipeline, and the outlet end 103 of the diversion channel 101 is connected to the mixed-flow sedimentation chamber 104. The tailings slurry enters the diversion channel 101 through the inlet end 102 and enters the mixed-flow sedimentation chamber 104 through the outlet end 103. Among them, a flocculant addition pipe 106 is fixedly installed at the bottom of the central cylinder 100. A number of flocculant spray pipes 105 are equidistantly communicated on the flocculant addition pipe 106. The flocculant spray pipes 105 obliquely cut into the diversion channel 101 upward, and the liquid flow direction of the flocculant spray pipes 105 forms a counterflush with the liquid flow direction of the diversion channel 101, which can not only use the counterflush of the liquid flow to slow down the flow rate of the tailings slurry, but also enable the tailings slurry to fully contact and mix evenly with the flocculant. At the same time, a number of impellers 107 are also arranged at intervals in the diversion channel 101. The impellers 107 rotate under the impact of the tailings slurry. It can be imagined that by setting the liquid flow to block the impact of the tailings slurry, the effect of slowing down the flow rate of the tailings slurry can be achieved, and the rotation of the impellers 107 can stir the tailings slurry and the flocculant to make the two fully contact and mix evenly.

[0023] In the above, referring to Figure 2As shown, there are multiple groups of impellers 107 arranged along the diversion channel 101, and at least one flocculant spray pipe 105 is arranged between adjacent impellers 107. It can be imagined that by setting the flocculant spray pipe 105 in sections to add the flocculant, the tailings slurry can be fully contacted with the flocculant. And with at least one flocculant spray pipe 105 arranged between adjacent impellers 107, after the flocculant contacts the tailings slurry, it flows through the impeller 107 for stirring, making the mixing of the flocculant and the tailings slurry more uniform. Of course, in this embodiment, the impeller 107 includes a shaft and blades. The shaft is rotatably installed in the diversion channel 101 in a bearing connection manner, and the blades are circumferentially arrayed on the shaft. Utilizing the impact of the tailings slurry on the blades, the impeller 107 rotates. The blades can achieve the effect of reducing speed and can also serve the purpose of stirring and mixing evenly.

[0024] As Figure 1 and Figure 2 shown, the mixed-flow sedimentation chamber 104 is conical in shape, with a large top diameter and a small bottom diameter. The top diameter is smaller than the outer diameter of the diversion channel 101, so as to form a space for installing the flocculant addition pipe 106 at the joint plane between the diversion channel 101 and the mixed-flow deceleration chamber. A number of flow-reducing baffles 108 are circumferentially arranged on the inner wall of the mixed-flow sedimentation chamber 104, and adjacent two flow-reducing baffles 108 are arranged in a high-low staggered manner. It can be imagined that after the mixed liquid of the tailings slurry and the flocculant enters the mixed-flow sedimentation chamber 104 from the outlet end 103 of the diversion channel 101, blocked by the flow-limiting baffles, the full mixing of the tailings slurry and the flocculant is further promoted, and the speed of the mixed liquid entering the mixed-flow sedimentation chamber 104 is reduced. Finally, the fully mixed liquid settles to the bottom of the thickener under the action of gravity.

[0025] In summary, the embodiment of the present application provides a thickener central cylinder structure, which can reduce the flow rate of the tailings slurry and the flocculant entering the mixed-flow sedimentation chamber, and can achieve the full mixing of the tailings slurry and the flocculant, significantly improving the sedimentation effect and making the sedimentation effect better.

[0026] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A thickener center cylinder structure, characterized in that: A spiral guide channel and a mixed flow sedimentation chamber are formed in the central tube, the outlet end of the guide channel is connected to the mixed flow sedimentation chamber, and the central tube is provided with a plurality of flocculant nozzles obliquely cutting into the guide channel from the outside to the inside, the liquid flow direction of the flocculant nozzles forms a recoil with the liquid flow direction of the guide channel, and the guide channel is provided with a plurality of impellers, which rotate due to the impact of the liquid flow in the guide channel.

2. The thickener center tube structure according to claim 1, characterized in that: A flocculant adding pipe is arranged at the bottom of the central tube, and the flocculant adding pipe is connected with the flocculant spraying pipes one by one.

3. The thickener center tube structure according to claim 1, characterized in that: The impeller comprises a wheel shaft and blades. The wheel shaft is rotatably mounted in the flow guide channel, and the blades are evenly distributed on the wheel shaft in the circumferential direction.

4. The thickener center tube structure according to claim 1, characterized in that: The inner wall of the mixed flow settling chamber is provided with a plurality of flow-reducing baffles in a circumferential array, and two adjacent flow-reducing baffles are arranged in a staggered manner.

5. The thickener center tube structure according to claim 1, characterized in that: The mixed flow sedimentation chamber is arranged in a cone shape.

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