CN212308933U - Thickener - Google Patents

Abstract

The utility model discloses a thickener, including cell body, hoist and mount feeding case at top in the cell body, establish the overflow at cell body top and assemble the groove, arrange on the cell body lateral wall and assemble the overflow delivery pipe of groove intercommunication with the overflow, cell body top-down divide into heavy storage area and vibration area, is connected with the underflow on the cell body outer wall of vibration area and arranges the material pipe, has arranged the vibration subassembly in the vibration area, is equipped with in the cell body of vibration area bottom and makes the thick liquid water pipe. The utility model discloses divide into the cell body and sink storage area and vibration region, only set up the vibration subassembly in the vibration region, sink storage area undisturbed. Due to the action of the flocculating agent, the tailings in the sedimentation area are of a floccule structure, the coarse and fine particle fractions are not classified, and the particle fractions in the bin are uniform; the flocculated tailing sand ball has good water retention performance, low overall concentration and strong fluidity, and is not easy to harden in storage; the flocculation tailing lumps are destroyed and/or extruded by the exciting force of the vibrator, and the discharge concentration of the underflow tailing slurry of the thickener is improved.

Description

Thickener

Technical Field

The utility model relates to a mine fills technical field useless admittedly, especially relates to a thickener.

Background

The filling mining method belongs to the field of manual support mining method. In the chamber or block, as the stope face advances, fill material is fed into the goaf for ground pressure management, control of surrounding rock caving and surface movement, and stoping on or under the protection of the formed fill. The filling mining method has the advantages of high recovery rate, safe operation, surface and ground protection and the like, and is widely applied to underground mines.

The common filling aggregate used in metal mines is tailings (or tailings, including graded tailings and full tailings). The main filling process flow is that tailings with low mass concentration (generally 10-20% and 40-45% when passing through a high-efficiency thickener) from a factory are pumped to a deep cone thickener of a filling preparation station, flocculated and concentrated to high concentration (about 55-80%), then discharged into a stirring system, mixed and stirred with a cementing material (the cementing material can not be added during non-cemented filling) to form satisfactory filling slurry, and the required filling slurry flows automatically or is pumped to a place to be filled through a drilling hole and an underground filling pipeline.

According to the structure and the operation mode of the deep cone thickener, the defects are as follows:

1. in order to prevent tailing hardening and realize smooth discharge of tailing slurry, a rake structure is generally adopted, and the manufacturing cost accounts for more than 50-80% of the whole thickener.

2. The deep cone thickener has a complex structure, cannot realize general design, a large number of parts are customized products, accessories need directional purchase, the autonomous maintenance difficulty is high, and the construction investment and operation cost is high.

3. The tailing sand is added with a flocculating agent to form a tailing sand floc group which can accelerate sedimentation, but water is also wrapped in the tailing sand floc group, the deep cone thickener shears and destroys the floc group by a water guide rod rotating along with the rake frame, the water in the tailing sand floc group is discharged, and the underflow discharge quality concentration is improved. The water guide rod continuously moves in the mud layer, tailing floc is gradually destroyed, coarse and fine particles are separated, when the thickener cannot continuously discharge, coarse-fraction tailings are rapidly settled and are gathered at the bottom of the thickener, and after the thickener recovers to discharge, all coarse-fraction materials are easy to cause pipe blockage; when the material is not discharged for a long time, the rake pressing accident is easily caused.

4. Due to the addition of the flocculating agent, the water retention of the flocculated tailing group is enhanced, compared with natural sedimentation of the tailing, the flocculation sedimentation mass concentration of the tailing is reduced by 2-8%, and high concentration is difficult to realize, so that the unpowered thickener is difficult to prepare high-concentration tailing slurry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's weak point, provide a cell body upper portion grain size is even, mobility is strong, the high thickener of material concentration is arranged to bottom tailings thick liquid.

The utility model provides a thickener, including cell body, hoist and mount feeding case at top in the cell body, establish the overflow at cell body top and assemble the groove, arrange on the cell body lateral wall and assemble the overflow delivery pipe of groove intercommunication with the overflow, cell body top-down divide into heavy storage area and vibration area, is connected with the underflow on the cell body outer wall of vibration area and arranges the material pipe, has arranged the vibration subassembly in the vibration area, is equipped with in the cell body of vibration area bottom and makes the thick liquid water pipe.

The pool body comprises an upper cylindrical section, a lower cylindrical section and an inverted circular truncated cone section which is connected with the upper cylindrical section and the lower cylindrical section, the bottom of the lower cylindrical section is sealed, and the gradient of the conical surface of the inverted circular truncated cone section is more than or equal to 5 degrees.

The vibration assembly is at least provided with one layer from top to bottom in the vibration area, and each layer of vibration assembly at least consists of one vibrator.

The vibration area comprises a lower cylindrical section, the vibrators in the same layer of vibration assembly are arranged in parallel in a horizontal projection plane, and the vibrators in the adjacent layer of vibration assembly are arranged in parallel and/or in a crossed manner in the horizontal projection plane.

The vibration region also comprises an inverted circular truncated cone section, and the vibrators in the same layer of vibration assembly are arranged in an annular array in the inverted circular truncated cone section.

And all the vibrators positioned in the inverted circular truncated cone section are obliquely arranged above the center of the tank body.

The feeder box includes the feedwell, the flocculating agent of feeder pipe and cartridge in the feedwell adds the pipe, the feeder pipe is arranged on the feedwell along tangential direction intercommunication, from top to bottom arranged in the feedwell of feedwell below has annular guide plate and a plurality of energy dissipation riser, the flocculating agent that has arranged between annular guide plate and energy dissipation riser adds on managing has arranged the several and has added the hole, be equipped with the sawtooth weir at the feedwell top, sawtooth weir top surface parallel and level or be less than the overflow and assemble the groove and arrange, be equipped with the guide material section of closing up the mouth form bottom the feedwell.

The feed barrel above the feeding pipe is internally provided with a dilution water reverse stop plate arranged along the circumferential direction of the feed barrel, the dilution water reverse stop plate is obliquely arranged below the center of the feed barrel, an isolation inner barrel is arranged in the feed barrel above the dilution water reverse stop plate, and the top surface of the isolation inner barrel is higher than the tank body.

The feeding barrel further comprises a conical discharging disc arranged below the material guiding section, the conical surface of the conical discharging disc and the bottom surface of the material guiding section are arranged at intervals from top to bottom to form a circumferential floc discharging opening, and a plurality of distributing plates are uniformly distributed on the conical surface of the conical discharging disc in an annular mode.

A pressure reduction and drainage assembly which is communicated up and down is arranged in the tank body between the feeding box and the vibration assembly, the pressure reduction and drainage assembly is arranged at the axis of the tank body and comprises a drainage pipe and a pressure reduction cover connected to the bottom of the drainage pipe, and seepage water in the vibration area is connected to a mud layer interface of the sedimentation area through the drainage pipe.

Compared with the prior art, the utility model has the advantages of it is following:

1. divide into the cell body and sink storage area and vibration area, only set up the vibration subassembly in the vibration area, sink the storage area undisturbed. Due to the action of the flocculating agent, the tailings in the sedimentation area are of a floccule structure, the coarse and fine particle fractions are not classified, and the particle fractions in the bin are uniform; the flocculated tailing sand ball has good water retention performance, low overall concentration, strong fluidity and difficult hardening in storage.

2. When the thickener discharges materials, the vibration assembly is started, the flocculation tailings cluster is damaged and/or extruded by the exciting force of the vibrator, and because the specific gravity of the tailings is greater than the specific gravity of water, water in the flocculation tailings cluster forms an ascending discharge channel in a vibration area, so that the discharge concentration of tailing slurry flowing from the bottom of the thickener is improved; through the vibration effect of the vibrator, the tight arrangement of tailing particles can be promoted, the porosity is reduced, and the discharging concentration of the underflow tailing slurry of the thickener is improved.

3. The high-concentration tailing slurry can improve the flowing property under the thixotropic action of the exciting force of the vibration assembly, and the smoothness of discharging is kept, so that the rake-free design is completed, the structure is simpler, no power consumption is caused in the sand setting process, no transmission part is required, the reliability is high, and the rake pressing problem of a deep cone thickener is avoided.

The utility model discloses simple structure can realize general design, and accessories is general, and equipment investment is low, and the maintenance degree of difficulty is little, and the operation cost is low.

Drawings

Fig. 1 is a schematic structural diagram of the medium-density thickener of the present invention.

Fig. 2 is a schematic view of an enlarged cross-sectional structure at a-a in fig. 1.

Fig. 3 is a schematic view of a part of the enlarged structure in the direction B of fig. 1.

Fig. 4 is a schematic view of a part of the enlarged structure at C in fig. 1.

Fig. 5 is another schematic structural diagram of the vibrator according to the first embodiment.

Fig. 6 is a schematic structural view of the middle feeding box of the present invention.

Fig. 7 is a schematic view of the structure in direction D of fig. 6.

FIG. 8 is a schematic view of the structure at E-E in FIG. 6.

FIG. 9 is a schematic view of the structure at F-F in FIG. 6.

Fig. 10 is a schematic structural diagram of a middle thickener according to the present invention.

The labels shown in the figures and the corresponding component names are:

1. a tank body; 11. a settling area; 12. a vibration region; 13. an upper cylindrical section; 14. rounding off the frustum section; 15. a lower cylindrical section; 16. a fixed seat;

2. a feeding box; 21. a charging barrel; 211. a saw-tooth weir; 212. a material guiding section; 213. a conical discharging disc; 214. a circumferential flock discharge opening; 215. a distributing plate; 22. a feed pipe; 23. a flocculant addition pipe; 231. an addition hole; 232. a straight pipe section; 233. a conical section; 234. a paddle; 24. an annular baffle; 25. an energy dissipation vertical plate; 26. a dilution water reverse stopping plate 27 and an isolation inner barrel;

3. an underflow discharge pipe;

4. a vibrating assembly; 41. a vibrator; 411. an eccentric vibrator; 412. a variable frequency motor; 413. a sheath; 414. sealing the rubber sleeve; 415. fixing a sleeve; 416. a spring; 417. a flexible coupling; 418. a seal ring;

5. a slurry making water pipe;

6. an overflow convergence tank;

7. an overflow drain pipe;

8. a pressure reducing drain assembly; 81. a drain pipe; 82. a pressure reducing hood;

9. sealing and filling;

10. and a compression ring.

Detailed Description

Example one

As can be seen from FIGS. 1 to 3, the thickener of the present embodiment comprises a tank body 1, a feeding tank 2, an underflow discharge pipe 3, a vibration assembly 4, a slurrying water pipe 5, an overflow gathering tank 6 and an overflow discharge pipe 7,

the pool body 1 comprises an upper cylindrical section 13, a lower cylindrical section 15 and an inverted circular truncated cone section 14 connected between the upper cylindrical section 13 and the lower cylindrical section 15, the slope of the conical surface of the inverted circular truncated cone section 14 is not less than 5 degrees, the bottom of the lower cylindrical section 15 is sealed, wherein the upper cylindrical section 13 and the inverted circular truncated cone section 14 are a sinking storage area 11 of the pool body 1, the lower cylindrical section 15 is a vibration area 12 of the pool body 1,

the feeding box 2 is hung on the top of the sedimentation area 11 in the tank body 1 through a hanging rod,

the underflow discharge pipe 3 is horizontally arranged on the outer wall of the lower cylindrical section 15 and communicated with the interior of the lower cylindrical section 15,

the vibrating components 4 are three layers, three vibrating components 4 are arranged on a lower cylindrical section 15 in a vibrating area 12 at equal intervals from top to bottom, the lower vibrating component 4 is positioned below the underflow discharge pipe 3, the upper vibrating component 4 consists of three vibrators 41 which are hermetically inserted on the lower cylindrical section 15, the middle vibrating component 4 consists of two vibrators 41 which are hermetically inserted on the lower cylindrical section 15, the lower vibrating component 4 consists of three vibrators 41 which are hermetically inserted on the lower cylindrical section 15, the vibrators 41 in the same layer of vibrating components 4 are arranged in parallel in a horizontal projection plane, the vibrators 41 in adjacent vibrating components 4 are arranged in parallel in the horizontal projection plane,

the slurry making water pipe 5 is hermetically inserted on the lower cylindrical section 15 below the lower layer vibration component 4, the outlet end of the slurry making water pipe 5 is arranged in the tank body 1,

the overflow converging tank 6 is circumferentially welded on the inner side of the top of the sedimentation area 11 along the circumferential direction of the tank body 1,

the overflow discharge pipe 7 is welded on the side wall of the tank body 1 at the outer side of the top of the sedimentation area 11, and the overflow discharge pipe 7 is communicated with the overflow convergence tank 6.

As can be seen from fig. 4, the vibrator 41 in this embodiment includes a rod-shaped hollow housing, an eccentric vibrator 411 disposed in the rod-shaped hollow housing, and a variable frequency motor 412 for driving the eccentric vibrator 411 to rotate in the rod-shaped hollow housing to generate vibration, the rod-shaped hollow housing includes a sheath 413, a sealing rubber sleeve 414, and a fixing sleeve 415 tightly connected in sequence from front to back, a spring 416 is connected between the sheath 413 and the fixing sleeve 415 inside the sealing rubber sleeve 414, a plurality of fixing bases 16 are welded on the wall of the cell body 1 in the vibration region 12, the fixing sleeve 415 is gap-fitted in the fixing bases 16, the front end of the sheath 413 is sealed in the cell body 1, a sealing filler 9 is filled between the fixing sleeve 415 and the fixing bases 16, a compression ring 10 is covered on the fixing base 16 outside the sealing filler 9, the eccentric vibrator 411 is disposed in the sheath 413, the variable frequency, the output end of the variable frequency motor 412 is connected with the fixed shaft of the eccentric vibrator 411 through a flexible coupling 417, two ends of the flexible coupling 417 are in interference fit with the variable frequency motor 412 and the eccentric vibrator 411, the vibrator 41 is driven by the variable frequency motor 412, and the excitation intensity of the vibrator 41 is controlled by adjusting the frequency value of the frequency converter.

When the variable frequency motor 412 is used, the eccentric vibrator 411 is rotated through the flexible coupling 417, and the centrifugal force generated by the eccentric vibrator 411 is borne by the sheath 413 under the action of the flexible coupling 417, so that the phenomenon that the centrifugal force generated by the eccentric vibrator 411 generates pressure on the output end of the variable frequency motor 412 to increase the friction loss of the variable frequency motor 412 is avoided.

As can be seen from fig. 5, in this embodiment, the variable frequency motor 412 of the vibrator 41 is a miniature variable frequency motor, the eccentric vibrator 411 and the variable frequency motor 412 are both disposed in the sheath 413, the output end of the variable frequency motor 412 is directly fixed to the fixed shaft of the eccentric vibrator 411, and a sealing ring 418 is disposed in the sheath 413 outside the variable frequency motor 412; the vibrator 41 is driven by an inverter motor 412, and the excitation intensity of the vibrator 41 is controlled by adjusting the frequency value of the inverter.

As can also be seen from fig. 6 to 9, the feeding box 2 in this embodiment includes a feeding barrel 21, a feeding pipe 22, a flocculant adding pipe 23, an annular guide plate 24 and an energy dissipation vertical plate 25, the feeding barrel 21 is internally divided into a feeding dilution area, a flocculation mixing area and a floc discharging area which are sequentially communicated from top to bottom, a saw-toothed weir 211 is disposed at the top of the feeding barrel 21, a closing-mouth-shaped guide section 212 is connected to the bottom of the feeding barrel 21, the feeding barrel 21 is suspended at the top of the sedimentation area 11 in the tank body 1 through a suspension lug and a suspension rod which are disposed on the outer wall of the feeding barrel 21, the top surface of the saw-toothed weir 211 is flush with or lower than the overflow gathering tank 6, and an opening at the bottom of the;

the feeding pipe 22 is communicated and arranged on the feeding barrel 21 at the lower part of the feeding dilution zone along the tangential direction;

the annular guide plate 24 is fixedly connected in the feeding barrel 1 at the upper part of the flocculation mixing zone 12;

the flocculant adding pipe 23 comprises a straight pipe section 232 and a conical section 233, the straight pipe section 232 is arranged at the axis of the feed barrel 21, the conical section 233 is connected to the bottom of the straight pipe section 232 through a bearing, the conical section 233 can rotate around the axis of the straight pipe section 232, the conical section 233 is communicated with the straight pipe section 232, a plurality of adding holes 231 are uniformly distributed at the bottom of the conical section 233 along the circumferential direction of the feed barrel 21, the adding holes 231 are arranged in a flocculation mixing area below the annular guide plate 24, and blades 234 arranged along the radial direction of the feed barrel 21 are arranged on the conical section 233 between adjacent adding holes 231;

a plurality of energy dissipation risers 25 are arranged in a flocculation mixing zone below the adding hole 231 in an annular array around the axis of the feed barrel 21, and each energy dissipation riser 25 is arranged along the radial direction of the feed barrel 21.

As can be seen from fig. 1 to 3, the feed box 2 in this embodiment further includes a dilution water back-stop plate 26 and an isolation inner barrel 27, the dilution water back-stop plate 26 is welded in the feed barrel 21 below the saw-tooth weir 211 along the circumferential direction of the feed barrel 21, the cross section of the dilution water back-stop plate 26 is arranged obliquely towards the lower center of the feed barrel 21, so as to prevent slurry in the feed barrel 21 from overflowing to the outside of the feed barrel 21 through the saw-tooth weir 211, thereby causing overflow water to run out; the isolating inner barrel 27 is sleeved in the feed barrel 21 above the dilution water check plate 26 in a clearance mode, and the top surface of the isolating inner barrel 27 is arranged higher than the sawtooth weir 211.

As can be seen from fig. 6 to 8, the feeding barrel 21 in this embodiment further includes a conical discharging tray 213, the conical discharging tray 213 is fixedly connected to the energy dissipating vertical plate 25 through a connecting rod and is disposed below the material guiding section 212, the conical discharging tray 213 is disposed coaxially with the feeding barrel 21, the diameter of the bottom surface of the conical discharging tray 213 is greater than that of the bottom surface of the material guiding section 212, the conical surface of the conical discharging tray 213 and the bottom surface of the material guiding section 212 are disposed at an upper and lower gap to form a circumferential floc discharging opening 214, and the circumferential floc discharging opening 214 is disposed in the floc discharging area of the feeding barrel 21; a plurality of distributing plates 215 for evenly discharging the tailing flocs to the periphery of the feed barrel 21 are evenly and annularly distributed on the conical surface of the conical discharging tray 213.

As can be seen from fig. 1, the present embodiment further includes a pressure-reducing drainage assembly 8 disposed at the axial center of the tank body 1 between the feeding tank 2 and the vibration assembly 4, the pressure-reducing drainage assembly 8 is through-shaped, and includes a drainage pipe 81 and a pressure-reducing cover 82 connected to the bottom of the drainage pipe 81, and the seepage water in the vibration zone 12 is connected to the mud layer interface of the subsidence area 11 through the drainage pipe 81.

In the present embodiment, it is also possible to adopt a configuration in which the vibrator 41 in the upper layer vibration module 4 and the vibrator 41 in the middle layer vibration module 4 are arranged in parallel in the horizontal projection plane, and the vibrator 41 in the middle layer vibration module 4 and the vibrator 41 in the lower layer vibration module 4 are arranged in an intersecting manner in the horizontal projection plane.

In the present embodiment, it is also possible to adopt a manner that the vibrator 41 in the upper layer vibration module 4 and the vibrator 41 in the middle layer vibration module 4, and the vibrator 41 in the middle layer vibration module 4 and the vibrator 41 in the lower layer vibration module 4 are arranged in a crossing manner in the horizontal projection plane.

Example two

As can be seen from fig. 10, the present embodiment is different from the first embodiment in that the upper cylindrical section 13 is the sedimentation region 11 of the tank body 1, the inverted circular truncated cone section 14 and the lower cylindrical section 15 are the vibration region 12 of the tank body 1, a layer of vibration assembly 4 is further provided on the inverted circular truncated cone section 14 of the vibration region 12, the layer of vibration assembly 4 is composed of a plurality of vibrators 41 arranged in an annular array around the axis of the tank body 1, each vibrator 41 is hermetically inserted into the inverted circular truncated cone section 14, and the vibration end of each vibrator 41 is placed in the inverted circular truncated cone section 14 and is obliquely arranged above the center of the tank body 1.

The utility model discloses a method for using of thickener, including following step:

s1, injecting tailing slurry into the feeding box 2 and diluting:

s11, hanging the feed barrel 21 on the top of the sedimentation zone 11 in the tank body 1 to ensure that clarified water in the tank body 1 can cross the sawtooth weir 211 and enter the feed barrel 21;

s12, injecting the primary tailing slurry into a feeding dilution area of the feeding barrel 21 along the tangential direction through the feeding pipe 22, taking clear water in the sedimentation area 11 as dilution water to enter the feeding barrel 21 through the sawtooth weir 211, and mixing and homogenizing the primary tailing slurry and the dilution water in the feeding dilution area through the incoming kinetic energy of the primary tailing slurry; under the blocking action of the annular guide plate 24, the primary tailing slurry and the dilution water cannot immediately sink to the flocculation mixing area;

s2, adding a flocculating agent into the diluted tailing slurry in the feeding box 2 to form a flocculated tailing cluster:

after the tailing slurry is diluted to the optimal concentration of flocculation sedimentation, the diluted tailing slurry sinks to a flocculation mixing area under the action of self weight; adding a flocculating agent into the flocculation mixing area at multiple points through a flocculating agent adding pipe 23, utilizing turbulent kinetic energy after dilution of the tailing slurry, and homogenizing the diluted tailing slurry and the flocculating agent in the flocculation mixing area to form flocculation tailing clusters;

s3, uniformly sinking the flocculated tailing sand clusters to a floccule discharging area through the energy dissipation vertical plates 25, gathering the flocculated tailing sand clusters to the middle part through the material guiding section 212, converging and homogenizing the flocculated tailing sand clusters, and finally discharging the flocculated tailing sand clusters into the sedimentation area 11 of the pool body 1 through the conical material discharging disc 213 along the circumferential floccule discharging port 214;

when the thickness of a settled mud layer of the flocculated tailing sand mass in the tank body 1 is more than or equal to 3m, starting the vibrators 41 in the vibration area 12 to destroy the flocculated tailing sand mass, discharging water wrapped by the flocculated tailing sand mass, promoting the close arrangement of tailing particles, and improving the quality concentration of tailing slurry in the vibration area; then opening a valve on the underflow discharge pipe 3 to discharge underflow slurry of the thickener;

s4, when the underflow slurry in the tank body cannot be discharged, starting a water inlet valve on the slurry making water pipe 5 to perform back flushing dilution on the tailing slurry in the vibration area 12, and simultaneously starting the vibration assembly 4 in the vibration area 12 to perform homogenization dilution on the tailing slurry;

s5, when the underflow slurry in the tank body is smoothly discharged, the water inlet valve on the slurry making water pipe 5 is closed, and the underflow slurry is discharged out of the tank body 1 from the underflow discharge pipe 3.

Claims (10)

1. The utility model provides a thickener, includes cell body (1), hoist and mount feeding case (2) at top in the cell body, establish overflow at the cell body top and assemble groove (6), arrange on the cell body lateral wall and assemble overflow delivery pipe (7) that the groove communicates with the overflow, its characterized in that: the tank body is divided into a settling area (11) and a vibration area (12) from top to bottom, the outer wall of the tank body of the vibration area is connected with an underflow discharge pipe (3), a vibration assembly (4) is arranged in the vibration area, and a slurry making water pipe (5) is arranged in the tank body at the bottom of the vibration area.

2. The thickener of claim 1, wherein: the pool body comprises an upper cylindrical section (13), a lower cylindrical section (15) and an inverted circular truncated cone section (14) which connects the upper cylindrical section and the lower cylindrical section, the bottom of the lower cylindrical section is sealed, and the gradient of the conical surface of the inverted circular truncated cone section is more than or equal to 5 degrees.

3. The thickener of claim 2, wherein: the vibration assembly is at least provided with one layer from top to bottom in the vibration area, and each layer of vibration assembly at least consists of one vibrator (41).

4. The thickener of claim 3, wherein: the vibration area comprises a lower cylindrical section, the vibrators in the same layer of vibration assembly are arranged in parallel in a horizontal projection plane, and the vibrators in the adjacent layer of vibration assembly are arranged in parallel and/or in a crossed manner in the horizontal projection plane.

5. The thickener of claim 4, wherein: the vibration region also comprises an inverted circular truncated cone section, and the vibrators in the same layer of vibration assembly are arranged in an annular array in the inverted circular truncated cone section.

6. The thickener of claim 5, wherein: and all the vibrators positioned in the inverted circular truncated cone section are obliquely arranged above the center of the tank body.

7. The thickener of claim 1, wherein: the feed box includes feedwell (21), feeder pipe (22) and cartridge add pipe (23) at the flocculating agent of feedwell in, the feeder pipe is arranged on the feedwell along tangential direction intercommunication, from top to bottom in the feedwell of feedwell below arranged annular guide plate (24) and a plurality of energy dissipation riser (25), it adds hole (231) to have arranged the several on flocculating agent interpolation pipe between annular guide plate and energy dissipation riser, be equipped with sawtooth weir (211) at the feedwell top, sawtooth weir top surface parallel and level or be less than the overflow and assemble the groove and arrange, be equipped with guide section (212) of closing up the mouth form bottom the feedwell.

8. The thickener of claim 7, wherein: be equipped with in the feed barrel of feeder pipe top along its circumference and arrange dilution water contrary board (26) that ends, this dilution water contrary board that ends inclines to feed barrel center below and arranges, is equipped with interior bucket (27) of keeping apart in the feed barrel of dilution water contrary board top, and the bucket top surface is higher than the cell body and arranges in keeping apart.

9. The thickener of claim 8, wherein: the charging barrel also comprises a conical discharging disc (213) arranged below the material guiding section, the conical surface of the conical discharging disc and the bottom surface of the material guiding section are arranged at intervals from top to bottom to form a circumferential floc discharging opening (214), and a plurality of distributing plates (215) are uniformly distributed on the conical surface of the conical discharging disc in an annular manner.

10. The thickener of claim 1, wherein: a pressure reduction drainage assembly (8) which is communicated up and down is arranged in the tank body between the feeding box and the vibration assembly, the pressure reduction drainage assembly is arranged at the axis of the tank body and comprises a drainage pipe (81) and a pressure reduction cover (82) connected to the bottom of the drainage pipe, and seepage water in the vibration area is connected to a mud layer interface of the sedimentation area through the drainage pipe.

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