Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
  • B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
  • B01F27/41—Mixers with rotor-rotor system, e.g. with intermeshing teeth with the mutually rotating surfaces facing each other
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/23—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis
  • B01F27/232—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes
  • B01F27/2322—Mixers with rotary stirring devices in fixed receptacles; Kneaders characterised by the orientation or disposition of the rotor axis with two or more rotation axes with parallel axes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/40—Mixers with rotor-rotor system, e.g. with intermeshing teeth
  • B01F27/42—Mixers with rotor-rotor system, e.g. with intermeshing teeth with rotating surfaces next to each other, i.e. on substantially parallel axes
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
  • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
  • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
  • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F11/00—Treatment of sludge; Devices therefor
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
• • C—CHEMISTRY; METALLURGY
  • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
  • C02F1/00—Treatment of water, waste water, or sewage
  • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
  • C02F1/5281—Installations for water purification using chemical agents

Definitions

• the present invention relates to a floculator used for preconditioning sludge and the like supplied to a dehydrator in a sludge dewatering system.
• a flocculator (aggregation tank) 31 as shown in FIG. 6 has been widely used for refining the processing stock solution.
• the flocculator 31 is arranged on the upstream side of the dehydrator, and the raw material processing force conditioned in the flocculator 31 is sequentially flowed down to the dehydrator! .
• the flocculator 31 is usually provided with a stirring device 35 constituted by a motor 36, a shaft 37, a stirring blade 38 and the like.
• a stirring device 35 constituted by a motor 36, a shaft 37, a stirring blade 38 and the like.
• the rotational driving force of the motor 36 is transmitted to the stirring blade 38 via the shaft 37, and the stirring blade 38 rotates around the shaft 37 at a desired speed.
• the processing stock solution is removed with the valve (not shown) on the pipe connected to the processing stock solution outlet 33 closed.
• a polymer flocculant in an appropriate ratio with respect to the inflow amount of the processing stock solution is added from the inlet 34.
• the processing stock solution that has flowed into the tank reaches a predetermined level
• the processing stock solution and the polymer flocculant are mixed by the stirring device 35 (by rotating the stirring blade 38).
• the solid particles suspended and dispersed in the processing stock solution gradually aggregate to form flocs.
• the processing stock solution containing flocs is discharged from the outlet 33 and supplied to a dewatering machine or the like.
• the stirrer 35 is simply driven at a constant speed. It is preferable to adjust the stirring speed appropriately depending on the stage of the reaction. For example, initially, the stirring blade 38 is vigorously rotated (rapid stirring), the solid particles in the processing stock solution collide with the high molecular flocculant, and when they are sufficiently mixed, the stirring speed is reduced (slow stirring). If the formation of floc is promoted, the floc can be formed efficiently.
• two storage tanks (first tank and second tank) are arranged in series, the first tank is used for rapid stirring, the second tank is used for slow stirring, and the processing stock solution flows down sequentially.
• There is also a power that is configured in such a way (two-tank type flocrator).
• the two-tank type flocrator requires a wider installation space than the one-tank type as shown in Fig. 6, so there is enough space. If not, there is a problem that installation is difficult.
• the first tank also supplies the processing stock solution to the second tank by overflow (that is, the processing stock solution overflowed from the first tank flows to the second tank. Therefore, there was a problem that the flocculator was not installed in the closed conduit and the processing stock solution could not be pumped by the pump.
• the present invention was made to solve the above-described problems of the prior art, and although it is a single tank type, refining work can be performed continuously and smoothly, and in a short time. It is an object of the present invention to provide a flocculator that can form a block efficiently.
• the floatator of the present invention is provided with a plurality of stirring blades that can be rotated at different speeds in one tank, so that rapid stirring and slow stirring can be simultaneously performed in one tank. It is characterized by being configured.
• the plurality of stirring blades may be configured such that the rotational driving force is supplied by a plurality of individually connected motors, or appropriate power distribution means ( Via gear or pulley)
• a plurality of stirring blades may be connected so that the stirring blades rotate at different speeds.
• the capacity can be changed, so that a part of the wall or the bottom of the flocculator is preferably movable so that the capacity can be changed. Is preferred.
• the floatator of the present invention rapid stirring and slow stirring can be performed simultaneously in one tank, so that the tempering operation can be performed smoothly and continuously even though it is a single tank type. Flock can be formed efficiently in time.
• the “two-component method”, which was difficult to apply in the past, can be applied.
• FIG. 1 is a configuration diagram of a floatulator 1 according to a first embodiment of the present invention.
• 2 is a processing stock solution inlet
• 3 is an outlet
• 4 is a polymer flocculant inlet
• 5 (5a, 5b) are stirring devices.
• stirring devices 5 are vertically attached. These stirring devices 5a and 5b are composed of motors 6a and 6b, shafts 7a and 7b, stirring blades 8a.
• the lower stirring device 5b is configured to be driven at a lower speed than the upper stirring device 5a.
• the flocculator 1 of this embodiment can simultaneously perform rapid stirring and slow stirring by simultaneously driving these two stirring devices 5a and 5b. Quality work can be performed smoothly.
• the processing stock solution is introduced from the inlet 2 with the valve (not shown) on the pipe connected to the processing stock solution outlet 3 closed, and the processing stock solution Add a polymer flocculant in an appropriate proportion to the inflow rate from the inlet 4.
• Incoming processing stock solution When the pressure reaches a predetermined level in the tank, the stirring devices 5a and 5b are driven.
• a method called "two-component method” a tempering method using both an iron-based or aluminum-based inorganic flocculant and a polymer flocculant (amphoteric)).
• This method is mainly implemented in a two-tank type flocrator, and the force that was difficult to apply in a conventional one-tank type floculator is the same as that in the present embodiment. Liquid methods can be applied.
• FIG. 2 is a configuration diagram of the floatulator 1 according to the second embodiment of the present invention. As shown in the figure, in this flocculator 1, four agitators 5a to 5d are arranged in parallel in the vertical direction.
• the shafts 7a and 7b of the stirring devices 5a and 5b extend in the vertical direction, and the stirring blades 8a and 8b are configured to rotate around the vertical axis.
• the shafts 7 a to 7 d extend in the horizontal direction, and the stirring blades 8 a to 8 d are configured to rotate around the horizontal axis.
• the second-stage stirring device 5b is slightly slower than the uppermost stirring device 5a.
• the third-stage stirring device 5c is slightly more than the second-stage stirring device 5b.
• the slowest stirrer 5d is configured to be driven slightly slower than the third stirrer 5c. In other words, the rotational speed of the stirring blade 8 is gradually lowered from the upper stage to the lower stage.
• the flocculator 1 of this embodiment is driven by these four stirring devices 5a to 5d simultaneously, thereby promoting mixing with the polymer flocculant and flock formation in a more ideal form. You can make progress. Specifically, at the top of the flocculator 1, the solid particles in the processing stock solution collide with the polymer flocculant by rapid stirring to quickly mix them. As the treatment stock solution is lowered, the stirring speed gradually decreases, so that the state force suitable for mixing can be smoothly shifted to a state suitable for floc formation, further increasing the aggregation effect. Improvement and smoothness of refining work can be realized.
• the pulleys 9a to 9d (power distribution means) for transmitting power, for example, in the flocculator 1 of FIG. 3 (or FIG. 4).
• the lower stage pulley 9b is made larger than the pulley 9a
• the upper stage pulley 9c (9b ') is made smaller than the lowermost stage pulley 9d (9c). It is preferable to configure so that the rotation speed becomes gradually lower. With such a configuration, the initial cost and running cost of the motor 6 can be reduced.
• the power distribution means is not limited to the pulley 9 as shown in FIGS. 3 and 4, and a gear mechanism or the like can be used.
• FIG. 5 is a configuration diagram of the floatulator 1 according to the third embodiment of the present invention.
• two stirring devices 5a and 5b are arranged in parallel in the up and down direction, Slow agitation can be performed simultaneously.
• the bottom portion 11 is configured to be slidable in the vertical direction, whereby the capacity of the flocculator 1 can be freely changed. More specifically, the bottom portion 11 has a driving force (electrical, hydraulic, pneumatic, steam pressure, etc.) (not shown) within the range of the position force indicated by the solid line in FIG. It is possible to move in the vertical direction by a device that supplies driving force using the), and at the contact portion (the outer peripheral surface of the bottom portion 11 in contact with the inner peripheral surface of the flocculator 1), the processing stock solution in the tank is Measures are taken to prevent leakage to the outside, and the watertightness inside the tank is maintained. It is.
• a driving force electrical, hydraulic, pneumatic, steam pressure, etc.
• the bottom 11 is movable, and the capacity can be freely changed. Therefore, when the supply amount of the processing stock solution is changed, When the properties of the processing stock changes! As a result, it can be dealt with appropriately, and as a result, tempering and subsequent dehydration can be optimized.
• a multi-channel dehydrator (a single press filter or the like) is connected to the downstream side of the flocculator 1.
• the shaft 7b of the lower stirring device 5b passes through the bottom 11, and when the bottom 11 moves in the vertical direction, the motor 6b, the shaft 7b,
• the stirring blade 8b is also configured to move together with the stirring blade 8b. It is not necessarily limited to the configuration that applies force.
• the movable type shown in FIG. When applying the base 11, the base 11 is connected to the shaft 7 shown in FIG. 7d, 7c) and stirring blades 8 (especially 8d, 8c), etc., and can be configured to move at a position where they do not interfere with each other.
• the stirring blade 8 can be configured to be retracted to a position where it does not interfere with the stirring blade 8 or to be removed as appropriate.
• a part of the wall surface connected to the bottom 11 may be movable so that the capacity in the tank can be changed.
• FIG. 1 is a configuration diagram of a floatulator 1 according to a first embodiment of the present invention.
• FIG. 2 is a configuration diagram of a floatulator 1 according to a second embodiment of the present invention.
• FIG. 3 is a diagram showing another configuration example of the floating modulator 1 according to the second embodiment of the present invention.
• FIG. 4 is a diagram showing another configuration example of the floating modulator 1 according to the second embodiment of the present invention.
• FIG. 5 is a configuration diagram of a floatulator 1 according to a third embodiment of the present invention.
• FIG. 6 is a configuration diagram of a conventional floatator 31.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Life Sciences & Earth Sciences (AREA)
• Hydrology & Water Resources (AREA)
• Engineering & Computer Science (AREA)
• Environmental & Geological Engineering (AREA)
• Water Supply & Treatment (AREA)
• Organic Chemistry (AREA)
• Mixers Of The Rotary Stirring Type (AREA)
• Treatment Of Sludge (AREA)
• Separation Of Suspended Particles By Flocculating Agents (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39183492

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (9)

Citations (7)

Family Cites Families (1)

• 2006
  • 2006-09-12 JP JP2006246194A patent/JP4223528B2/ja not_active Expired - Fee Related
  • 2006-12-22 KR KR1020087024524A patent/KR101130605B1/ko not_active Expired - Fee Related
  • 2006-12-22 WO PCT/JP2006/325607 patent/WO2008032422A1/ja active Application Filing
  • 2006-12-22 CN CN2006800544273A patent/CN101443091B/zh not_active Expired - Fee Related

Patent Citations (7)

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