Stepped efficient thickener with partitioned pretreatment device

Abstract

The utility model discloses a stepped efficient thickener with a partitioned pretreatment device. Relates to the technical field of solid-liquid separation equipment, and comprises a thickener and a pretreatment device communicated with the thickener, the pretreatment device is used for flocculation, and the thickener is used for sedimentation; the pretreatment device comprises a main body, a stirring device is arranged in the main body, the top of the main body is provided with a liquid inlet chute for materials to enter and a feeding pipe for a flocculant to enter, the bottom of the main body is provided with a discharge port, the side wall of the upper part of the main body is provided with a supernatant overflow port, the middle of the main body is provided with a liquid discharge port, and the liquid discharge port is communicated to the inside of the thickener through a conveying pipeline; according to the efficient thickener, flocculation and sedimentation processes can be carried out in different areas, the thickening efficiency is improved, the occupied area of the thickener and equipment type selection are remarkably reduced, the energy consumption and the environmental influence are further reduced, and the operation flexibility, the maintenance convenience and the like are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to solid -liquid separation equipment technical field especially is with the zonal pretreatment device's cascade high -efficient thickener. BACKGROUND

[0002] Gravity sedimentation is one of the important methods of solid-liquid separation, thickener is a kind of equipment that realizes solid-liquid separation by gravity sedimentation, and is widely used in mining, metallurgy, chemical industry and environmental protection fields. The development of thickener mainly experienced three key stages-the traditional thickener of initial stage relies on natural sedimentation, does not use flocculating agent, and has large area, low sedimentation efficiency, and limited treatment capacity and efficiency. With the development of technology, flocculating agent is started to be applied in thickener to reduce the area of thickener, speed up the sedimentation speed and improve the treatment efficiency.

[0003] Patent CN107961569B discloses a zonal sedimentation thickener, which comprises a pool body, a rotary harrow shaft, a harrow frame, a coarse particle level filter cylinder, a medium particle level filter cylinder and a classifier. However, the thickener represented by the patent technology still has the following shortcomings and deficiencies in actual application: 1. The zonal sedimentation is realized, but the internal partitions of the equipment are too concentrated, the coarse, medium and fine three filter cylinders are closely connected, the structure is complex, and the sedimentation height of the thickener is increased to expand the sedimentation area, the space layout of the equipment is greatly changed, and the equipment cost is high. 2. The sedimentation speeds of particles of three different particle sizes are different, the sedimentation time is not effectively reduced, the overall efficiency of solid-liquid separation is still low, only the particle classification and zonal sedimentation are realized, and the actual process benefit is not obvious. UTILITY MODEL CONTENT

[0004] In order to effectively improve the sedimentation efficiency with less equipment cost, the application provides a cascade high-efficiency thickener with zonal pretreatment device.

[0005] The application provides a cascade high-efficiency thickener with zonal pretreatment device, which adopts the following technical scheme:

[0006] The cascade high-efficiency thickener with zonal pretreatment device comprises a thickener and a pretreatment device communicated with the thickener, the pretreatment device is used for flocculation, and the thickener is used for sedimentation. The pretreatment device comprises a main body, a stirring device is arranged in the main body, a liquid inlet chute for feeding material and a feeding pipe for feeding flocculating agent are arranged on the top of the main body, a discharge port is arranged at the bottom of the main body, a supernatant overflow port is arranged on the side wall of the upper part of the main body, a liquid discharge port is arranged in the middle of the main body, and the liquid discharge port is communicated to the inside of the thickener through a conveying pipeline.

[0007] Further, the top of the main body is open, the middle section and the upper section are cylinder bodies, and the lower section is a cone body. The discharge port is arranged at the bottom end of the cone body.

[0008] Furthermore, the stirring device includes a stirring shaft, and a bridge is provided on the top of the main body. The stirring shaft is rotatably connected to the bridge, and the rotation axis of the stirring shaft is arranged in the vertical direction; the bridge is also provided with a stirring motor for driving the stirring shaft to rotate, and the stirring shaft is also provided with multiple stirring rakes at intervals along its own length direction.

[0009] Furthermore, the stirring rake includes a plurality of blades, and the plurality of blades are evenly spaced along the circumferential direction of the stirring shaft.

[0010] Furthermore, the liquid discharge port, supernatant overflow port and discharge port are all provided with valves.

[0011] Furthermore, the thickener includes a body, which is a cylinder with an open top and a funnel-shaped bottom. The bottom of the body is provided with a discharge port for the material to flow out.

[0012] Furthermore, a bridge is also set up on the top of the machine body, and a cleaning shaft is rotatably connected to the bridge, and the rotation axis of the rotary rake is arranged in the vertical direction; a plurality of sweeping rods are arranged on the rotary rake along its own circumferential direction, and a plurality of sweeping blocks are arranged on the sweeping rods at intervals along its own length direction, and the bottom end of the sweeping block abuts the bottom wall of the machine body.

[0013] In summary, this application has the following beneficial technical effects:

[0014] The utility model realizes partitioning and pre-processing of the two main functions of the thickener, flocculation and sedimentation, through the pretreatment device. The flocculation and pre-sedimentation processes are mainly carried out in the pretreatment device area, while the thickener mainly carries out and completes the sedimentation process that is not completed in the pretreatment device area. The entire treatment process is hierarchical, so that the thickener can output smoothly, the solid-liquid separation is complete, the working conditions are stable, and the quality of the output product is guaranteed. In production, the processes in the two areas are carried out in parallel, which effectively improves the sedimentation effect, greatly improves the working efficiency of the thickener, can reduce the sedimentation area of ​​the thickener, reduce the equipment construction cost, and further improve the economic benefits of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural diagram of the cascade high-efficiency thickener with a partitioned pretreatment device of the present application;

[0016] Figure 2 yes Figure 1 A sectional view of the overall structure of the pretreatment device;

[0017] Figure 3 yes Figure 1 Cross-sectional view of the overall structure of the medium-thickener.

[0018] Description of reference numerals:

[0019] 1, main body; 11, liquid inlet chute; 12, feeding pipe; 13, discharge port; 14, supernatant overflow port; 15, liquid discharge port; 21, conveying pipeline; 22, corridor bridge; 31, stirring shaft; 32, stirring motor; 33, stirring rake; 34, blade; 41, machine body; 42, discharge port; 43, rotary rake; 44, sweeping rod; 45, rake tooth; 46, cleaning motor. DETAILED DESCRIPTION

[0020] The following will be described in detail in combination with the accompanying drawings. Figures 1-3 The application is further described in detail.

[0021] The embodiment of the application discloses a step efficient thickener with a partitioned pretreatment device, the thickener is communicated with the pretreatment device, wherein the pretreatment device is responsible for flocculation and pre-settling process, the pretreatment device comprises a main body 1, the top of the main body 1 is provided with a liquid inlet chute 11 for feeding materials and a feeding pipe 12 for feeding flocculants, an outer frame is arranged on the top and is provided with a corridor bridge 22 for people to pass through, the bottom is provided with a discharge port 13, the upper side wall is provided with a supernatant overflow port 14, the middle part is provided with a liquid discharge port 15, and the liquid discharge port 15 is communicated to the inside of the thickener through a conveying pipeline 21; the top of the main body 1 is open, the middle section and the upper section are cylinder bodies, and the lower section is a cone body, and the discharge port 13 is arranged at the bottom end of the cone body; the liquid discharge port 15, the supernatant overflow port 14 and the discharge port 13 are all provided with valves capable of controlling flow.

[0022] Meanwhile, a stirring device is arranged in the main body 1 to accelerate the mixing of the flocculants and the solid particles in the liquid; the stirring device comprises a stirring shaft 31, the stirring shaft 31 is rotationally arranged on the corridor bridge 22, the rotation axis of the stirring shaft 31 is arranged in the vertical direction, two groups of stirring rakes 33 are vertically and spaced apart arranged on the stirring shaft 31, each group of stirring rakes 33 comprises a plurality of blades 34, and the plurality of blades 34 are uniformly and spaced apart arranged in the circumferential direction of the stirring shaft 31; meanwhile, a stirring motor 32 for driving the stirring shaft 31 to rotate is also arranged on the corridor bridge 22; in the application, the pretreatment device mainly completes the flocculation function and only completes the settlement by the way, so the rotating speed of the stirring shaft 31 is relatively fast and can be set to 50-100 r / min.

[0023] The liquid discharge port 15 of the pretreatment device main body 1 is communicated to the upper part of the thickener through the conveying pipeline 21, the thickener comprises a machine body 41, the upper part of the machine body 41 is open, the conveying pipeline 21 conveys the flocculated liquid from the upper opening to the thickener, at this time, most of the fine particle materials in the liquid have been removed through flocculation and settlement; the thickener is mainly responsible for the settlement function, the middle section and the upper end of the thickener are cylinder bodies, the lower section is a funnel shape, the bottom end is provided with a discharge port 42 for discharging materials, and the liquid discharge port 15 is also provided with a valve capable of controlling flow.

[0024] The gallery bridge 22 is also arranged on the top of the thickener body 41, the gallery bridge 22 is rotationally connected with a cleaning shaft, the gallery bridge 22 is provided with a cleaning motor 46 for driving the cleaning shaft to rotate, and the rotating axis of the rotary rake 43 is arranged along the vertical direction; a plurality of sweeping rods 44 are arranged on the rotary rake 43 along the circumferential direction of the rotary rake 43, a plurality of rake teeth 45 are arranged on the sweeping rod 44 along the length direction of the sweeping rod 44, the bottom end of the rake tooth 45 abuts against the inner bottom wall of the thickener body 41, and the rake tooth 45 is arranged at an angle with the radial direction of the thickener body 41; the rake tooth 45 in the oblique linear shape makes the slurry not only be raked to the center, but also be subjected to a “accumulation” force to the center in the raking process, so that the underflow concentration and the processing capacity are improved; it should be noted that the thickener is mainly responsible for completing the sedimentation, therefore, the rotating speed is 0.1-1 r / min.

[0025] The flocculation and pre-sedimentation process are mainly carried out in the pretreatment device area, and the sedimentation process which is not completed in the pretreatment device area is mainly carried out and completed in the thickener, the whole treatment process realizes the hierarchical level, so that the thickener can be smoothly output, the solid-liquid separation is complete, the working condition is stable, and the output product quality is ensured; in production, the two area processes are parallel, the sedimentation effect is effectively improved, the working efficiency of the thickener is greatly improved, the sedimentation area of the thickener can be reduced, the equipment construction cost is reduced, and the economic benefit of the production process is further improved.

[0026] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A high-efficiency cascade thickener with a zoned pretreatment device, characterized by: It includes a thickener and a pre-treatment device connected to the thickener, the pre-treatment device is used for flocculation, and the thickener is used for sedimentation; The pretreatment device includes a main body, in which a stirring device is provided, an inlet chute for material entry and a feeding pipe for flocculant entry are provided on the top of the main body, a discharge port is provided at the bottom, a supernatant overflow port is provided on the upper side wall, and a drain port is provided in the middle, which is connected to the inside of the thickener through a conveying pipe.

2. The high-efficiency cascade thickener with a partitioned pretreatment device according to claim 1, characterized in that: The top of the main body is open, the middle section and the upper section are cylindrical, the lower section is a cone, and the discharge port is arranged at the bottom end of the cone.

3. The high-efficiency cascade thickener with a zoned pretreatment device according to claim 1, characterized in that: The stirring device includes a stirring shaft, and a gallery bridge is provided on the top of the main body. The stirring shaft is rotatably connected to the gallery bridge, and the rotation axis of the stirring shaft is arranged in the vertical direction; the gallery bridge is also provided with a stirring motor for driving the stirring shaft to rotate, and the stirring shaft is also provided with multiple stirring rakes at intervals along its own length direction.

4. The high-efficiency cascade thickener with a zoned pretreatment device according to claim 3, characterized in that: The stirring rake includes a plurality of blades, and the plurality of blades are evenly spaced along the circumferential direction of the stirring shaft.

5. The high-efficiency cascade thickener with a zoned pretreatment device according to claim 1, characterized in that: The liquid discharge port, the supernatant overflow port and the material discharge port are all provided with valves.

6. The high-efficiency cascade thickener with a zoned pretreatment device according to claim 1, characterized in that: The thickener comprises a body, which is a cylinder with an open top and a funnel-shaped bottom. The bottom of the body is provided with a discharge port for the material to flow out.

7. The high-efficiency cascade thickener with a zoned pretreatment device according to claim 6, characterized in that: A bridge is also set up on the top of the machine body, and a rotating rake is rotatably connected to the bridge, and the rotating axis of the rotating rake is set in the vertical direction; a plurality of sweeping rods are set on the rotating rake along its own circumferential direction, and a plurality of rake teeth are set on the sweeping rods at intervals along its own length direction, and the bottom ends of the rake teeth abut against the bottom wall of the machine body, and the rake teeth are inclined in the radial direction; a cleaning motor for driving the cleaning shaft to rotate is provided on the bridge.

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