CN205886307U - There is not concentrated machine of harrow with formula of circling round annular channel - Google Patents

Abstract

The utility model relates to a concentrated clarification field of coal slime water, concretely relates to there is not concentrated machine of harrow with formula of circling round annular channel. The utility model discloses at least including concentrated organism, still make it the reciprocating movement formula annular channel that circles round including being used for retraining concentrated built -in upper strata ore pulp, the formula of circling round annular channel comprises the crescent multiunit annular channel of diameter, and adjacent annular channel is within a definite time by interface channel interconnected, and every annular channel of group includes the annular diaphragm on upper portion and the slope settlement plate of lower part, the overflow is discharged from the overflow weir, and the overflow weir includes annular overflow weir and compound overflow weir, settling particulate gets into underflow discharge system, and underflow discharge system collects storehouse, underflow opening and corresponding underflow pump package by the underflow and becomes, the utility model discloses still include pan feeding pipeline and drive rabbling mechanism, utilize the pan feeding pipeline to carry the remaining power drive rabbling mechanism of ore pulp to rotate and realize ore pulp and medicament homogeneous mixing, these concentrated machines have the energy consumption low, and the maintenance volume is low, and the medicine consumes lowly, need not the characteristics of rake.

Description

A kind of no rake thickener with Clothoid type circular passage

Technical field

This utility model is related to slime water concentration clarification field and in particular to a kind of no rake with Clothoid type circular passage Thickener.

Background technology

Thickener is the equipment being completed using solid particle flocculating sedimentation in black water to black water continuous concentration.It Essence be by one for black water precipitation cell body and one by precipitate collect underflow opening and discharge underflow discharge system System constitutes jointly.Its production process is continuous, and black water feeds from cell body upper center, and the overflow water after clarification is from pond Body periphery flows into overflow tank, and the product (underflow) after precipitation bores the underflow opening pumped at bottom from cell body.Traditional thickener Also known as raker thickener, there is a rake transporting precipitate to center enrichment；Raker thickener to divide from transport characteristicses, Center driving and two kinds of peripheral-traction formula can be divided into；To divide from construction featuress and can be divided into common thickener and high-efficiency concentrator two Kind, high-efficiency concentrator is the concentration nitride layer that black water pan feeding directly feeds thickener body middle and lower part, shortens coal slime settling Distance, contribute to the sedimentation of coal slime granule, increased coal slime enter overflow resistance, improve effect of settling, therefore be called High-efficiency concentrator, such as Eem section (eimco-bsp) high-efficiency concentrator, domestic high-efficiency concentrator etc..Existing thickener is in transmission dress Put with housing construction on study more, but downflow weir design aspect innovate less, how to guarantee that medicament and black water fill in addition Divide mix homogeneously to ensure how in thickener body, turbulence level is less, ensure thickener working stability again, prevent thickener rake Frame is this area Recent study focus by high concentration material " pressure rake ".

Content of the invention

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and the constraint of setting Clothoid type circular passage concentrates In machine, upper strata ore pulp is allowed to do Clothoid type in thickener body and moves back and forth, and increases granule residence time and putting forward in thickener The sedimentation probability of high fine slime；Also set up compound downflow weir, precipitation is completely clarified overflowing liquid and can be overflow by multiple simultaneously Stream weir discharge, thus reducing the level stream movement velocity of ore pulp in thickener body, further improve coal slime sedimentation probability and Reduce turbulence level in thickener body；This utility model also drives rabbling mechanism rotation to reach using the energy of pulp conveying Medicament is uniformly mixed with ore pulp, arranges simultaneously and discharges precipitation by the underflow discharge system transfer that multigroup underflow collecting bin forms Thing, without rake, thoroughly solves " pressure rake " phenomenon, thickener working stability.

For achieving the above object, this utility model employs technical scheme below:

A kind of no rake thickener with Clothoid type circular passage, at least include thickener body it is characterised in that: originally set For also including being allowed to do the Clothoid type circular passage of reciprocating for constraining upper strata ore pulp in thickener, Clothoid type annular is logical Road, with thickener center as the center of circle, gradually expands from inside to outside, and the circular passage of inner side is located at the surrounding driving rabbling mechanism, Outermost circular passage is located at the surrounding of compound downflow weir and near thickener center side；Described Clothoid type circular passage by Multigroup circular passage composition that diameter is gradually increased, adjacent annular interchannel is interconnected by interface channel, every group of circular passage The inclination sedimentation plate of the toroidal membrane including top and bottom, toroidal membrane and inclination sedimentation plate are connected by fixed connection mode, incline Tiltedly sedimentation plate passes through support and the support of thickener organism sidewall；On the described toroidal membrane of outermost circular passage, arrangement is many Group ore pulp go out head piece, the distance going out between head piece of adjacent ore pulp is equal；This equipment also includes for execution, clarification being overflow Flow liquid is collected the downflow weir discharged, this downflow weir includes annular downflow weir, compound downflow weir, inflation adjust rise floating baffle plate, Tilt sedimentation plate, overflow collector groove.

Described downflow weir includes along the annular downflow weir of thickener body surrounding arrangement and is circular layout along internal body Compound downflow weir, the annular downflow weir of surrounding is connected by overflow collector groove between compound downflow weir；Described compound downflow weir leans on Nearly thickener center side arranges inflation and adjusts the floating baffle plate of liter, and the bottom of compound downflow weir is arranged inclination by way of affixed and sinks Fall plate, is tilted sedimentation plate and is supported with thickener organism sidewall by support；Described compound downflow weir at least includes compound together overflowing Liu Yan, two roads are combined downflow weir, inflation adjusts the floating baffle plate of liter and the inflation of two roads adjusts and rises floating baffle plate together.

This equipment also includes underflow discharge system, and underflow discharge system is by underflow collecting bin, underflow opening and corresponding underflow Pump group becomes；Described underflow collecting bin is made up of center underflow collecting bin and both sides underflow collecting bin, and underflow collecting bin is tapered, on Portion's opening is rectangular, and bottom connects underflow opening；Described underflow opening is made up of center underflow opening and both sides underflow opening, and underflow opening is discharged Material conveyed by corresponding underflow pump；Described underflow pump is made up of center underflow pump and both sides underflow pump.This equipment also includes liquid Pressure rake lifting device, hydraulic pressure rake lifting device and motor are arranged on crane span structure, the revolution on crane span structure and thickener body center top Support and connect；Described hydraulic pressure rake lifting device is connected with harrow frame by hydraulic connecting rod.

This equipment also includes driving rabbling mechanism, and described driving rabbling mechanism is suspended at thickener body liquid level overcentre Place, drives the shell body of rabbling mechanism to assume the bell mouth shape construction that bore is gradually increased from top to down；Same in described shell body Axle arranges the rotating shaft of axis vertical, is coaxially arranged with diversion mixing impeller at the hypomere axle body of rotating shaft, coaxial at the epimere of rotating shaft Fixed drive turbine；The main pipeline being disposed with for pan feeding, the discharging side of described main pipeline is run through at the periphery wall of shell body Drive at the impeller blade of turbine to sensing；This equipment also includes the reductor rotating for rotating shaft reduction of speed.

Pressure gauge is provided with the main pipeline of described pan feeding, the main pipeline of pan feeding connects ore pulp pipeline；Described ore pulp pipeline It is connected with medicament pipeline, the junction point of medicament pipeline and ore pulp pipeline is located at the horizontal fragmentation of ore pulp pipeline, medicament pipeline inserts The horizontal fragmentation axis depth of ore pulp pipeline, agent outlet direction is contrary with ore pulp direct of travel；Described ore pulp pipeline vertical Pipe-line mixer is arranged on segmentation, with pulp flow direction for order, pipe-line mixer set-point is located at the rear of chemical feeding points；This Equipment also includes crane span structure, and crane span structure is connected with the shell body driving rabbling mechanism.

The beneficial effects of the utility model are:

1), this utility model is on the basis of based on traditional high-efficiency concentrator, in creative the setting in thickener body upper strata Count Clothoid type circular passage, in constraint thickener, upper strata ore pulp is allowed to do reciprocating, increased granule and stop in thickener The time stayed and the sedimentation probability improving fine slime；Multigroup circular passage group that Clothoid type circular passage is gradually increased by diameter Become, adjacent annular interchannel is interconnected by interface channel, and every group of circular passage includes the toroidal membrane on top and inclining of bottom Tiltedly sedimentation plate；Ore pulp back and forth advances along the circular passage between two dividing plates, from the interchannel interface channel of adjacent annular by interior side ring Shape passage gradually flows into the circular passage in outside, the distance that ore pulp flows through, and granule time of staying in thickener increases, and increases Granule, the particularly effect of settling of particulate；In order to ore pulp uniformly can be gone out flow to downflow weir from thickener tunneling boring, The head piece that goes out of multigroup ore pulp arranged on the toroidal membrane of circular passage in outside, the distance phase going out between head piece of adjacent ore pulp Deng；In the lower section of toroidal membrane, sedimentation plate is tilted by fixed connection mode arrangement, tilts sedimentation plate and installed with certain angle of inclination, Desilting area increases, and granule settling height shortens, and when ore pulp moves reciprocatingly in circular passage, granule is deposited in inclination sedimentation Underflow is entered on plate；Tilt sedimentation plate and pass through support and thickener organism sidewall to support it is ensured that whole Clothoid type circular passage Firm.

2), it is combined downflow weir, the rising overflow water driving between rabbling mechanism at compound downflow weir and center, from compound overflow Weir is discharged；Compound downflow weir also includes inflation and adjusts the floating baffle plate of liter, is combined the treating capacity of downflow weir for flexible, works as overflow Clarification of water degree is higher, can reduce inflation adjust rise floating baffle plate in air pressure, improve overflow output, when overflow water clarity relatively Low, inflation can be raised and adjust the air pressure rising in floating baffle plate, reduce overflow output；The compound downflow weir of setting can will conform to The clarification overflow water asked discharges thickener in time, reduces the movement velocity of level stream in thickener body, pan feeding ore pulp is from pan feeding Position moves to downflow weir needs the longer time, and the granule in ore pulp has longer time settlement to enter in underflow；Compound The bottom of downflow weir arranges inclination sedimentation plate in the way of affixed, tilts sedimentation plate and is installed with certain angle of inclination, precipitates face Long-pending increase, granule settling height shortens, and the overflow water for rising does last clarification settlement treatment it is ensured that overflow water clarity； Surrounding annular downflow weir and compound downflow weir integration of operation, have the effect improving thickener treatment effeciency and overflow water clarity Really.

3), underflow discharge system, underflow discharge system is made up of underflow collecting bin, underflow opening and corresponding underflow pump；Bottom Stream collecting bin is made up of center underflow collecting bin and both sides underflow collecting bin, using the set-up mode of multigroup underflow collecting bin, often The bulkhead inclination angle of group underflow collecting bin is big, is conducive to precipitate to underflow opening fast enriching；Underflow collecting bin is tapered, and top is opened Mouth is rectangular, and the cross-sectional area of formation is big, is conducive to precipitate directly to fall to underflow collecting region, underflow collecting bin bottom connects Underflow opening, every group of underflow collecting bin all has corresponding underflow opening and underflow pump, is easy to material and quickly transfers out thickener；Underflow is arranged The design of place system is it is ensured that thickener, in the case of no harrowing, normally and efficiently operates.

4), drive rabbling mechanism, with unique jet drive agitator as rabbling mechanism, using ore pulp pan feeding main pipeline ore deposit Driving turbine rotation in the drive force rotating shaft of slurry, and then the diversion mixing wheel rotation of drive shaft and rotating shaft lower end, Ore pulp and medicament under driving the collective effect of turbine and diversion mixing impeller, mix homogeneously, this design is by pulp conveying process In energy, be changed into the mechanical energy of medicament mix and blend, both realized dispersion and the mixing of medicament, reduced energy consumption again, have Maintenance capacity is low, the low feature of medicine consumption；Meanwhile, consume the unnecessary kinetic energy of ore pulp, reduce pan feeding to thickener body current stabilization flow field Impact；Additionally, rotating shaft is also connected with reductor, to guarantee to drive stirring structure in the case of meeting medicament mix and blend requirement, With slow-speed of revolution operating, reduce the impact to thickener body current stabilization flow field.The effect of the horn mouth design of shell body is by level The ore pulp of motion, progressively guides into vertical movement, and operating area is located at the lower section of Clothoid type circular passage, clear for follow-up sedimentation The good operating condition of clear offer.

5), pipeline, is provided with pressure gauge on the main pipeline of pan feeding, can react bed in thickener to a certain extent Change, when pressure gradually rises, illustrate concentrate nitride layer concentration raise；Pressure main pipe road connects ore pulp pipeline；Ore pulp pipe Road is connected with medicament pipeline, and junction point is located at the horizontal fragmentation of ore pulp pipeline, and medicament pipeline inserts the horizontal fragmentation of ore pulp pipeline Axis depth, agent outlet direction is contrary with ore pulp direct of travel, is conducive to the mixing of medicament and ore pulp；In order to realize further The mixing of medicament, arranges pipe-line mixer on the rear of chemical feeding points, vertical fragmentation in ore pulp pipeline.

Brief description

Fig. 1 is front schematic view of the present utility model；

Fig. 2 is the i part partial enlarged drawing of Fig. 1；

Fig. 3 is Clothoid type circular passage and downflow weir position and structural representation in Fig. 1 structure；

Fig. 4 is underflow discharge alliance and structural representation in Fig. 1 structure；

Illustrate each structure as follows with component names corresponding relation of the present utility model:

10- thickener body 11- thickener organism sidewall 20- Clothoid type circular passage

The circular passage 22- outermost circular passage 23- toroidal membrane of 21- inner side

24- tilts sedimentation plate 25- support 26- interface channel

27- goes out head piece 31- annular downflow weir 32- and is combined downflow weir

32a- is combined the compound downflow weir 33- inflation regulation of downflow weir 32b- bis- road together and rises floating baffle plate

33a- inflates the floating baffle plate 33b- bis- road inflation of regulation liter together and adjusts the floating baffle plate of liter

34- tilts sedimentation plate 35- overflow collector groove

41a- center underflow collecting bin 41b- both sides underflow collecting bin

42a- center underflow opening 42b- both sides underflow opening

43a- center underflow pump 43b- both sides underflow pump

50- drives rabbling mechanism 51- shell body 52- reductor 53- to drive turbine

54- rotating shaft 55- diversion mixing impeller 60- main pipeline 61- pressure gauge

62- ore pulp pipeline 63- medicament pipeline 64- pipe-line mixer 70- crane span structure

Specific embodiment

For ease of understanding, here in connection with Fig. 1-4, specific embodiment of the utility model is made described further below:

Concrete composition part of the present utility model, is divided into several big modules, comprising: thickener body 10, pan feeding pipeline,

Drive rabbling mechanism 50, Clothoid type circular passage 20, downflow weir 30 and underflow discharge system 40.Below one by one in addition Description:

1st, thickener body

Thickener body is the essential structure of thickener, and the flocculating sedimentation for black water and clarification provide enough volumes.

2nd, pan feeding pipeline

Ore pulp is conveyed by ore pulp pipeline 62, is successively provided with medicament pipeline 63 and pipeline mixes on the pipeline of pulp conveying Clutch 64；Medicament pipeline 63 inserts the horizontal fragmentation axis depth of ore pulp pipeline 62, agent outlet direction and ore pulp direct of travel On the contrary, realize feeding and mixing with the preliminary of ore pulp of medicament；Subsequently on the vertical fragmentation of ore pulp pipeline 62, setting pipeline mixes Clutch 64, is the preliminary mixing in order to realize medicament further, why arranges pipe-line mixer on vertical fragmentation and is because This mode arranges that the fluid turbulence degree than arranging generation on horizontal fragmentation is higher, and mixed effect is more preferable.

3rd, drive rabbling mechanism

Ore pulp enters the center feeding mouth of thickener with tentatively scattered medicament from the main pipeline 60 of pan feeding, how to enter one The uniform mixing realizing medicament and ore pulp of step, reduces the impact to steady flow condition in thickener for the pan feeding process simultaneously, is to drive The purpose of rabbling mechanism 50 setting.Using the driving whirlpool in the drive force rotating shaft 54 of ore pulp in the main pipeline 60 of ore pulp pan feeding Wheel 53 rotates, and then the diversion mixing impeller 55 of drive shaft 54 and rotating shaft lower end rotates, and ore pulp and medicament are driving turbine 53 With being stirred together under effect of diversion mixing impeller 55, mix homogeneously, this design, by the energy during pulp conveying, is changed into The mechanical energy of medicament mix and blend, had both realized dispersion and the mixing of medicament, had reduced energy consumption again, and it is low to have a maintenance capacity, and medicine consumption is low Feature；Meanwhile, consume the unnecessary kinetic energy of ore pulp, reduce the impact to steady flow condition in thickener body for the pan feeding；Additionally, turning Axle 54 is also connected with reductor 52, to guarantee to drive stirring structure 50 in the case of meeting medicament mix and blend requirement, with low turn Speed operating, reduces the impact to steady flow condition.The effect of the horn mouth design of shell body 51 is by the ore pulp of horizontal movement, progressively Guide into vertical movement, operating area is located at the lower section of Clothoid type circular passage, provide good ring for follow-up sedimentation clarification Border.

4th, Clothoid type circular passage

After the horn mouth low speed driving stirring structure 50 lower end flows out, most solid granule oliquely downward moves ore pulp Enter underflow, most water with partly difficult sedimentation fine grained to thickener upper direction it is intended to enter overflow, such as where Manage the ore pulp with fine granular materials for this part, be the key that can thickener be realized efficiently clarifying.This utility model is concentrating What machine body upper strata was creative devises Clothoid type circular passage 20, and in constraint thickener, upper strata ore pulp is allowed to do reciprocating fortune Dynamic, increase fine grained residence time and the sedimentation probability improving fine slime in thickener；Clothoid type circular passage 20 by Multigroup circular passage composition that diameter is gradually increased, adjacent annular interchannel is interconnected by interface channel 26, and every group of annular is logical Road includes the toroidal membrane 23 on top and the inclination sedimentation plate 24 of bottom；Ore pulp back and forth advances along the circular passage between two dividing plates, From the interchannel interface channel of adjacent annular 26 by interior annular passage gradually flow into outside circular passage, ore pulp flow through away from From length, granule time of staying in thickener increases, and increased granule, the particularly effect of settling of particulate；In order to allow the ore pulp can Uniformly to go out to flow to downflow weir 30 from thickener tunneling boring, the toroidal membrane of outermost circular passage 22 is arranged multigroup Ore pulp go out head piece 27, the distance going out between head piece of adjacent ore pulp is equal；Pass through fixed connection mode in the lower section of toroidal membrane 23 Arrangement tilts sedimentation plate 24, tilts sedimentation plate and is installed with certain angle of inclination, desilting area increases, and granule settling height contracts Short, when ore pulp moves reciprocatingly in circular passage, granule is deposited in and enters underflow on inclination sedimentation plate；Tilt sedimentation plate 24 to lead to Cross support 25 support with thickener organism sidewall 11 it is ensured that whole Clothoid type circular passage firm.

5th, downflow weir

Ore pulp through, after moving back and forth in Clothoid type circular passage, solids content is few, reaches the standard of overflow discharge, The head piece 27 that goes out from the toroidal membrane of outermost circular passage 22 flow to downflow weir 30, and downflow weir 30 includes annular downflow weir 31 and compound downflow weir 32, annular downflow weir 31 is connected by overflow collector groove 35 with compound overflow 32；Compound downflow weir 32 with The rising overflow water driving between rabbling mechanism 50 at center, discharges from compound downflow weir, and compound downflow weir also includes inflation and adjusts Rise floating baffle plate 33, be combined the treating capacity of downflow weir for flexible, when overflow water clarity is higher, inflation can be reduced and adjust Rise the air pressure in floating baffle plate, improve overflow output, when overflow water clarity is relatively low, inflation can be raised and adjust in the floating baffle plate of liter Air pressure, reduce overflow output；Satisfactory clarification overflow water can be discharged thickener by setting compound downflow weir in time, Reduce the movement velocity of level stream in thickener body, pan feeding ore pulp is when entering discharge position and move to downflow weir and need longer Between, the granule in ore pulp has longer time settlement to enter in underflow；Arranged in the way of affixed in the bottom of compound downflow weir Tilt sedimentation plate 34, tilt sedimentation plate and installed with certain angle of inclination, desilting area increases, and granule settling height shortens, and is The overflow water rising does last clarification settlement treatment it is ensured that overflow water clarity；Compound downflow weir is to thickener organism sidewall Between overflow water discharged by surrounding annular downflow weir, using surrounding annular downflow weir and compound downflow weir integration of operation, have and carry Highly enriched machine treatment effeciency and the effect of overflow water clarity.

6th, underflow discharge system

Underflow discharge system 40 is entered, underflow discharge system is by underflow collecting bin 41, underflow opening 42 and right after granule sedimentation The underflow pump 43 answered forms；Underflow collecting bin 41 is made up of center underflow collecting bin 41a and both sides underflow collecting bin 41b, adopts The set-up mode of multigroup underflow collecting bin, the bulkhead inclination angle of every group of underflow collecting bin is big, is conducive to precipitate quick to underflow opening Assemble；Underflow collecting bin 41 is tapered, and upper opening is rectangular, and the cross-sectional area of formation is big, is conducive to precipitate directly to fall To underflow collecting region, underflow collecting bin bottom connects underflow opening 42, and every group of underflow collecting bin all has corresponding underflow opening 42 and bottom Stream pump 43, is easy to material and quickly transfers out thickener；The design of underflow discharge system is it is ensured that thickener is in the case of no harrowing, just Often high-efficiency operation.

To sum up, structure of the present utility model and working mechanism take into full account the technology characteristics that slurry water flocculation settles, and concentrate Machine body flow field is stable, and coal slime flocculating sedimentation effect is good, and overflow water clarity is high, and reagent consumption amount is low, without rake, thoroughly Solve " pressure rake " phenomenon.Whole concentration operation more saves medicament than traditional concentration and settlement equipment, has higher concentration effect Rate, work is relatively reliable stable, and production cost reduces also extremely obvious.

Claims (4)

1. a kind of no rake thickener with Clothoid type circular passage, at least include thickener body (10) it is characterised in that: this Equipment also includes being allowed to do the Clothoid type circular passage (20) of reciprocating, Clothoid type for constraining upper strata ore pulp in thickener Circular passage (20), with thickener center as the center of circle, gradually expands from inside to outside, and the circular passage (21) of inner side is located at and drives The surrounding of rabbling mechanism (50), outermost circular passage (22) is located at the surrounding of compound downflow weir (32) and in thickener Heart side；Described Clothoid type circular passage (20) is made up of multigroup circular passage that diameter is gradually increased, adjacent annular interchannel Interconnected by interface channel (26), every group of circular passage includes the toroidal membrane (23) on top and the inclination sedimentation plate of bottom (24), toroidal membrane (23) and inclination sedimentation plate (24) are connected by fixed connection mode, tilt sedimentation plate (24) and pass through support (25) Support with thickener organism sidewall (11)；Multigroup ore pulp is arranged on the described toroidal membrane of outermost circular passage (22) Go out head piece (27), the distance going out between head piece (27) of adjacent ore pulp is equal；This equipment also includes for execution, clarification being overflow Flow liquid is collected the downflow weir (30) discharged, and this downflow weir (30) includes annular downflow weir (31), compound downflow weir (32), fills Controlled atmosphere section rises floating baffle plate (33), tilts sedimentation plate (34), overflow collector groove (35).

2. a kind of no rake thickener with Clothoid type circular passage according to claim 1 it is characterised in that: described overflow Stream weir (30) is included along the annular downflow weir (31) of thickener body (10) surrounding arrangement with along answering that internal body is circular layout Close downflow weir (32), the annular downflow weir (31) of surrounding is connected by overflow collector groove (35) between compound downflow weir (32)；Institute State compound downflow weir (32) and adjust the floating baffle plate of liter (33) near the setting inflation of thickener center side, under compound downflow weir (32) Portion arranges inclination sedimentation plate (34) by way of affixed, tilts sedimentation plate (34) and passes through support (25) and thickener organism sidewall (11) support；Described compound downflow weir (32) at least include together compound downflow weir (32a), two roads be combined downflow weir (32b), one Road inflation adjusts the floating baffle plate of liter (33a) and the inflation of two roads adjusts and rises floating baffle plate (33b).

3. a kind of no rake thickener with Clothoid type circular passage according to claim 1 and 2 it is characterised in that: this Equipment also includes underflow discharge system (40), and underflow discharge system (40) by underflow collecting bin (41), underflow opening (42) and corresponds to Underflow pump (43) composition；Described underflow collecting bin (41) is by center underflow collecting bin (41a) and both sides underflow collecting bin (41b) Composition, underflow collecting bin (41) is tapered, and upper opening is rectangular, and bottom connects underflow opening (42)；Described underflow opening (42) by Center underflow opening (42a) and both sides underflow opening (42b) composition, the material that underflow opening (42) is discharged is defeated by corresponding underflow pump (43) Send；Described underflow pump (43) is made up of center underflow pump (43a) and both sides underflow pump (43b).

4. a kind of no rake thickener with Clothoid type circular passage according to claim 1 and 2 it is characterised in that: this Equipment also includes driving rabbling mechanism (50), and described driving rabbling mechanism (50) is suspended in thickener body (10) liquid level in the heart At side, the shell body (51) of rabbling mechanism (50) is driven to assume the bell mouth shape construction that bore is gradually increased from top to down；Described In shell body (51), the rotating shaft (54) of coaxially arranged axis vertical, is coaxially arranged with diversion mixing at the hypomere axle body of rotating shaft (54) Impeller (55), coaxial fixed drive turbine (53) at the epimere of rotating shaft (54)；Run through arrangement at the periphery wall of shell body (51) There is the main pipeline (60) for pan feeding, the discharging direction of described main pipeline (60) is pointed at the impeller blade driving turbine (53), main Pressure gauge (61) is provided with pipeline (60), the main pipeline (60) of pan feeding connects ore pulp pipeline (62)；Described ore pulp pipeline (62) It is connected with medicament pipeline (63), the junction point of medicament pipeline (63) and ore pulp pipeline (62) divides positioned at the level of ore pulp pipeline (62) Section, medicament pipeline (63) inserts the horizontal fragmentation axis depth of ore pulp pipeline (62), agent outlet direction and ore pulp direct of travel On the contrary；Setting pipe-line mixer (64) on the vertical fragmentation of described ore pulp pipeline (62), with pulp flow direction for order, pipeline Blender (64) set-point is located at the rear of chemical feeding points；This equipment also includes crane span structure (70) and reductor (52), crane span structure (70) with The shell body (51) driving rabbling mechanism (50) connects, and reductor (52) is connected with rotating shaft (54).