CN1981908A - Secondary-fluid mixing method and mixer for coagulating procedure - Google Patents
Secondary-fluid mixing method and mixer for coagulating procedure Download PDFInfo
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- CN1981908A CN1981908A CNA2005101342312A CN200510134231A CN1981908A CN 1981908 A CN1981908 A CN 1981908A CN A2005101342312 A CNA2005101342312 A CN A2005101342312A CN 200510134231 A CN200510134231 A CN 200510134231A CN 1981908 A CN1981908 A CN 1981908A
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Abstract
A secondary flow mixing method for the coagulation procedure features that after the coagulant is added to raw water, the raw water is flowing in the pipeline able to generate secondary flow for mixing under the action of secondary flow. Its apparatus is composed of a coagulant adding tube and a secondary flow pipe which may be a spirally coiled hard tube or a flexible tube wound on a cylindrical body.
Description
Affiliated technical field
The present invention relates to a kind of solid-liquid separation technique that is applied to water and field of waste water treatment, relate in particular to a kind of secondary stream mixing apparatus that is used for the secondary stream mixed method of coagulation process and adopts this method.
Background technology
Coagulation is important water and treatment unit for waste water, is usually used in removing suspended mineral particle, activated sludge, natural organic matter (NOM) and phosphorus etc. in the water.Coagulation generally can be divided into quick stirring and stir two steps at a slow speed.Fast whipping process is also referred to as mixed process, and is corresponding with the aggregation stage of coagulation process, and it is steady and coalescent etc. to be accompanied by taking off of the adding of coagulant, diffusion, hydrolysis and primary granule; Stirring at a slow speed then is in order to prevent the sedimentation of larger particles, to improve intergranular collision probability, so that generate big and closely knit flco, corresponding with the flocculation stage.Comparatively speaking, mixed process is more complicated, and is also even more important
[1]The quality of mixed effect determines the quality of final coagulation effect to a great extent, and mixed effect then is decided by hybrid technology and equipment.
In order to improve mixed effect, people have taked various mixed methods and equipment.Mechanical agitation is in the past the most frequently used hybrid mode.The velocity gradient in the flow field that this hybrid mode forms is very inhomogeneous, and the velocity gradient of paddle near zone is bigger, and less away from the velocity gradient in this regional bodies of fluid zone.Like this, when the small flco that forms in the bodies of fluid zone flow to the paddle near zone, owing to be subjected to bigger shear action broken phenomenon can take place, be unfavorable for the raising of mixed effect.Simultaneously, churned mechanically running cost is higher, and more because of moving equipment, is difficult to safeguard.In the last few years, because good mixed performance, tubular static mixer is engineering of water treatment teacher's favor extremely both at home and abroad, use very extensive, but the structure more complicated of this equipment, cost height, and the pressure loss of fluid when flowing through is bigger.In addition, in order to simplify the operation, also have the jet pump of employing or centrifugal pump to mix, but the effect of this mixing is generally undesirable.Above-mentioned mixed method, mainly be to cut apart and reorganization, or, improve the turbulent extent of fluid by the jet disturbing type fluid by the machine cuts convection cell of the hydrid component on the mixing apparatus (as the flow-disturbing assembly in paddle or the static mixer), to strengthen mass transfer, reach the purpose of mixing.
Summary of the invention
The object of the present invention is to provide a kind of secondary stream mixing apparatus that is used for the secondary stream mixed method of coagulation process and adopts this method,, reduce cost, cut down the consumption of energy, obtain excellent mixed effect simultaneously to simplify the structure of coagulation apparatus.Secondary stream is meant fluid when flowing through crooked pipeline, because action of centrifugal force, what take place on the cross section vertical with main flow flows.
To achieve these goals, the present invention proposes secondary is flowed as the mixed method in the coagulation process according to the characteristics of secondary stream reinforcement mass transfer, to strengthen mixed process, improves coagulation effect.This secondary stream mixed method is characterised in that: the former water of dosing coagulant, inflow can make it to produce the pipeline of secondary stream, coagulant is being well-dispersed under the effect of secondary stream among the water body, the active ingredient of coagulant is adsorbed in the suspended particulate substance surface and suspended particulate is taken off surely, simultaneously, particle after taking off surely collides mutually, sticks and constantly grow up under the effect of secondary stream, finally finishes mixed process.
The secondary stream mixing apparatus of implementing above-mentioned mixed method constitutes by being wound in the soft pipe on the cylinder or the stereoplasm tube (this soft pipe and stereoplasm tube are referred to as secondary stream pipe here) of coiled coil, and water body enters from an end of secondary stream pipe, discharges from the other end.There is a chemical feed pipe in water inlet end at secondary stream pipe, so that add coagulant.The length of run that constitutes the secondary stream pipe of secondary stream mixing apparatus can be 2～30m, and its internal diameter can be 3～100mm.Be used to twine the cylinder external diameter of soft pipe or the diameter of stereoplasm tube coiled coil can be 5～5000mm.The flow through mean flow rate of this mixing apparatus of water body can be 0.01～5m/s, and hydraulic detention time can be 0.01～10min.
The invention has the advantages that:
(1) flow field is more even, and velocity gradient difference is little, in the time of can not occurring in small flco that a certain zone generates and flow to another zone, broken phenomenon takes place because of the velocity gradient in second zone is big;
(2) velocity gradient in flow field is big, mass-transfer efficiency height, good mixing effect;
(3) mixing apparatus is simple in structure, is easy to realize, with low cost;
Pressure loss when (4) mixing apparatus moves is little, and energy consumption is low.
Description of drawings
Below in conjunction with accompanying drawing patent of the present invention is further specified.
Fig. 1 is being wound on the cylinder and the secondary that constitutes stream mixing apparatus by soft pipe among the present invention.
Fig. 2 is that the secondary that is made of the stereoplasm tube coiled coil among the present invention flows mixing apparatus.
Among the figure, 1. chemical feed pipe, 2. secondary stream pipe (soft or stereoplasm tube), 3. cylinder, 4. baffle plate; A. water inlet, B. delivery port, C. dosing mouth.
The specific embodiment
Among Fig. 1, secondary among the present invention stream mixing apparatus is wound on the cylinder 3 by soft secondary stream pipe 2 and constitutes, and the cylinder two ends are associated with baffle plate 4, in case secondary stream pipe 2 comes off from cylinder 3 ends.Pending former water enters this mixing apparatus from water inlet A, enters secondary stream pipe 2 after the coagulant that enters from dosing mouth C mixes, and is flowed out by water outlet B at last, enters the flocculation stage of coagulating.The connecting mode of water inlet A, water outlet B and dosing mouth C and other pipeline can be that flange connects or thread connection.
Among Fig. 2, the secondary stream mixing apparatus among the present invention is made of secondary stream pipe 2 coiled coils of hard.Pending former water enters this mixing apparatus from water inlet A, enters secondary stream pipe 2 after the coagulant that enters from dosing mouth C mixes, and is flowed out by water outlet B at last, enters the flocculation stage of coagulating.The connecting mode of water inlet A, water outlet B and dosing mouth C and other pipeline can be that flange connects or thread connection.
List of references:
[1]Dharmappa?H.B.，Verink?J.，Fujiwara?O.and?Vigneswaran?S.(1993)Optimal?design?of?a?flocculator.WaterResearch?27(3).513-519.
Claims (5)
1. a secondary that is used for coagulation process flows mixed method, and it is characterized in that: the former water of dosing coagulant, inflow can make it to produce the pipeline of secondary stream, finish mixed process under the effect of secondary stream.
2. implement the described secondary stream mixing apparatus that is used for coagulation process of claim 1, it is characterized in that: this equipment constitutes by being wound in the soft pipe on the cylinder or the stereoplasm tube (this soft pipe and stereoplasm tube are referred to as secondary stream pipe here) of coiled coil.
3. the secondary stream mixing apparatus that is used for coagulation process as claimed in claim 2, when its by being wound in soft pipe on the cylinder when constituting, it is characterized in that: this equipment is made up of the baffle plate 4 at chemical feed pipe 1, soft secondary stream pipe 2, cylinder 3, cylinder two ends; Have water inlet A, water outlet B and dosing mouth C on this equipment; The connecting mode of water inlet A, water outlet B and dosing mouth C and other pipeline can be that flange connects or thread connection.
4. the secondary stream mixing apparatus that is used for coagulation process as claimed in claim 2 when its stereoplasm tube by coiled coil constitutes, is characterized in that: this equipment is made up of the secondary stream pipe 2 of chemical feed pipe 1 and hard; Have water inlet A, water outlet B and dosing mouth C on this equipment; The connecting mode of water inlet A, water outlet B and dosing mouth C and other pipeline can be that flange connects or thread connection.
5. the method for designing of secondary stream mixing apparatus, it is characterized in that: the length of run that constitutes the secondary stream pipe 2 of secondary stream mixing apparatus can be 2～30m, and its internal diameter can be 3～100mm; Be used to twine the cylinder external diameter of soft pipe or the diameter of stereoplasm tube coiled coil can be 5～5000mm; The flow through mean flow rate of this mixing apparatus of water body can be 0.01～5m/s, and hydraulic detention time can be 0.01～10min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005101342312A CN1981908A (en) | 2005-12-14 | 2005-12-14 | Secondary-fluid mixing method and mixer for coagulating procedure |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2005101342312A CN1981908A (en) | 2005-12-14 | 2005-12-14 | Secondary-fluid mixing method and mixer for coagulating procedure |
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| CN1981908A true CN1981908A (en) | 2007-06-20 |
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| CNA2005101342312A Pending CN1981908A (en) | 2005-12-14 | 2005-12-14 | Secondary-fluid mixing method and mixer for coagulating procedure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423902A (en) * | 2011-11-26 | 2012-04-25 | 洛阳师范学院 | Novel mixing pipe for mixing concrete slurry and foaming agent foam |
| CN106082417A (en) * | 2016-07-29 | 2016-11-09 | 重庆鹏雷汽车配件有限公司 | Electroplate liquid cleaning plant |
| CN108622972A (en) * | 2018-07-13 | 2018-10-09 | 宁波上福源环保科技有限公司 | A kind of extremely letter high efficiency air float machine and air-float method |
| CN108911281A (en) * | 2018-09-25 | 2018-11-30 | 大连翼方科技有限公司 | A kind of drinking water efficient absorption device and method |
-
2005
- 2005-12-14 CN CNA2005101342312A patent/CN1981908A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102423902A (en) * | 2011-11-26 | 2012-04-25 | 洛阳师范学院 | Novel mixing pipe for mixing concrete slurry and foaming agent foam |
| CN102423902B (en) * | 2011-11-26 | 2014-01-08 | 洛阳师范学院 | Novel mixing pipe for mixing concrete slurry and foaming agent foam |
| CN106082417A (en) * | 2016-07-29 | 2016-11-09 | 重庆鹏雷汽车配件有限公司 | Electroplate liquid cleaning plant |
| CN108622972A (en) * | 2018-07-13 | 2018-10-09 | 宁波上福源环保科技有限公司 | A kind of extremely letter high efficiency air float machine and air-float method |
| CN108911281A (en) * | 2018-09-25 | 2018-11-30 | 大连翼方科技有限公司 | A kind of drinking water efficient absorption device and method |
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