CN103482744A - Horizontal flow sedimentation tank with sludge modification return system, and return method thereof - Google Patents
Horizontal flow sedimentation tank with sludge modification return system, and return method thereof Download PDFInfo
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- CN103482744A CN103482744A CN201310447149.XA CN201310447149A CN103482744A CN 103482744 A CN103482744 A CN 103482744A CN 201310447149 A CN201310447149 A CN 201310447149A CN 103482744 A CN103482744 A CN 103482744A
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Abstract
The invention relates to a horizontal flow sedimentation tank with a sludge modification return system, and a return method thereof. The horizontal flow sedimentation tank comprises a tank body as well as a water inlet and a water outlet formed in two ends of the tank body, wherein the tank body comprises a reaction zone and a transition zone which are sequentially arranged at the end close to the water inlet in the water flow direction; the horizontal flow sedimentation tank is characterized by further comprising a return system communicated with the tank body; the return system comprises a sludge pipeline for connecting the transition zone and the reaction zone, and a sludge transportation pump for driving sludge to flow back to the reaction zone from the transition zone; a medicine feeding pump and a sludge curing box are sequentially arranged in a pipeline of the sludge pipeline in the sludge transportation direction; the medicine feeding pump is used for adding an activating agent into the sludge. Through the sedimentation tank and the return method, which are provided by the invention, the quality of produced water is stable, the energy consumption is low, the effect is good, follow-up treatment processes are not influenced, moreover, the transformation workload is relatively small, and the cost is low.
Description
Technical field
The present invention relates to water treatment field, relate in particular to a kind of reaction settling basin.
Background technology
In water treatment field, be no matter to take the water purification industry that tap water is representative, or take the pure water industry that thermal power generation is representative, generally all to use reaction settling basin.Reaction settling basin has broad variety, and because China's development of modern industry is more late, the reaction precipitation technical equipment is mainly from USSR (Union of Soviet Socialist Republics) and America and Europe.At present also a large amount of use mainly be divided into two classes, i.e. advection (labyrinth) formula reaction settling basin (hereinafter to be referred as horizontal sedimentation tank) and mechanical agitation type reaction settling basin.Both differences are to provide the mode difference of coagulation clarification institute energy requirement.
The sludge reflux technology is to increase reaction settling basin subject range, raising reaction settling basin product water quality, the moving technical matters of minimizing product ripples.
Mechanical stirring is originally accelerated settling tank, and the water conservancy circulation accelerates in settling tank all to be widely used the sludge reflux technology, but the application of the sludge reflux on above two class pond shapes belongs to inner circulation of sludge, the character of uncontrollable mud.In recent years, above two kinds of pond types seldom application in new, enlarging and reconstruction project.The main flow pond type of coagulation clarification is efficient (high-density) settling tank and " micro-whirlpool " settling tank at present.Its middle-high density settling tank is the patented technology of Veolia water utilities, and micro-whirlpool is the proprietary technology of China, and both main differentiations are the required power resources differences of colloid coagulation.Because micro-whirlpool reaction settling basin belongs to the optimization of horizontal sedimentation tank, just added flap in labyrinth, occur while making water flow through flap that small whirlpool can provide coagulation needed hydromechanics gradient.Efficiently the coagulation power of (high-density) settling tank is produced by the blade rotation.Therefore, in production capacity, under certain condition, that is to say under the condition that flow velocity is certain, the hydromechanics gradient that the micro-vortex technology provides is also certain.In the situation that the water fluctuation is large or other is severe, the pond of micro-whirlpool technology there will be produces the moving larger situation of ripples, may cause and turn over pond.
Performance driving economy and the security that directly affect subsequent processing device understood in the pond of turning over of reaction settling basin.As, the filter plant effective run time shortens, and self water consumption increases, and produces water unstable etc.The material that some are special, as part colloid, partial organic substances, can only in the coagulation clarification process, remove, the unstable water quality that can affect product water in the water purification industry of reaction settling basin, can directly affect the work-ing life of follow-up desalter in the pure water industry, therefore each water treatment unit is usining pre-treatment that coagulation clarification the is core most important thing as whole Production Flow Chart, the coagulation clarification steady running work of carrying out of doing one's utmost.
Current horizontal sedimentation tank and " micro-vortex " settling tank of improveing on its basis, reason due to this body structure, can't when water occurrence temperature, change of water quality, control water quality and stable, the probability that produces the water deterioration is high, large on the impact of follow-up production capacity and device security.
Summary of the invention
The present invention has overcome the deficiencies in the prior art, provides a kind of with the sludge modification return-flow system, produces water quality stabilizing, and energy consumption is low, effective, on subsequent disposal without impact, and construction or the retrofit work amount little, the horizontal sedimentation tank that expense is low.
For achieving the above object, the technical solution used in the present invention is: a kind of horizontal sedimentation tank with the sludge modification return-flow system, the water-in and the water outlet that comprise the pond body and be located at body two ends, pond, described pond body comprises is located at nearly described water-in one end, the reaction zone set gradually along water (flow) direction and zone of transition, it is characterized in that: also comprise the return-flow system be connected with described pond body, described return-flow system comprises the sludge pipe that connects described zone of transition and reaction zone, and drive mud by zone of transition through reflux the back sludge delivery pump of reaction zone of sludge pipe, be provided with successively dosing pump and mud curing box along the mud throughput direction in the pipeline of described sludge pipe, described dosing pump adds activator for the mud to sludge pipe.
Preferably, the position that described sludge pipe is connected with described reaction zone is no more than 1/2nd places of reaction zone along the water (flow) direction width.
Preferably, the position that described sludge pipe is connected with described reaction zone is 1/4th to 1/2nd places along the water (flow) direction width at reaction zone.
Preferably, described sludge delivery pump is variable frequency pump.
Preferably, described sludge pipe comprises many spoil disposal pipelines that connect described zone of transition, and part spoil disposal pipeline is connected with described reaction zone, and described spoil disposal pipeline is provided with valve.
Preferably, the aqueous solution that described activator is anionic polyacrylamide, what join sludge pipe treats in returned sluge to form solution A, and the mass concentration that the amount that described dosing pump adds activator accounts for described solution A with anionic polyacrylamide is less than or equal to 6 ‰ and is as the criterion.
Preferably, the amount that described dosing pump adds activator accounts for described solution A mass concentration with anionic polyacrylamide is as the criterion 0.5 ‰-6 ‰.
Preferably, the sludge quantity that described return-flow system refluxes is more than or equal in the body of described pond and gets mud, 1% of front mud total amount refluxes.
The reflow method of the above-mentioned horizontal sedimentation tank with the sludge modification return-flow system also is provided, it is characterized in that, comprise the steps:
(1) coupling end of described sludge pipe and pond body is got mud in zone of transition, by sludge delivery pump, along sludge pipe, to reaction zone, refluxes;
(2) described dosing pump adds activator to the mud in sludge pipe, is added with mud slaking in described mud curing box of activator, completes modification;
(3) the described mud after modification is back to described reaction zone along sludge pipe.
Preferably, the position that described sludge pipe is connected with described reaction zone is no more than 1/2nd places of reaction zone along the water (flow) direction width.
Preferably, the position that described sludge pipe is connected with described reaction zone is 1/4th to 1/2nd places along the water (flow) direction width at reaction zone.
Preferably, described sludge delivery pump is variable frequency pump.
Preferably, described sludge pipe comprises many spoil disposal pipelines that connect described zone of transition, and part spoil disposal pipeline is connected with described reaction zone, and described spoil disposal pipeline is provided with valve.
Preferably, the aqueous solution that described activator is anionic polyacrylamide, what join sludge pipe treats in returned sluge to form solution A, and the mass concentration that the amount that described dosing pump adds activator accounts for described solution A with anionic polyacrylamide is less than or equal to 6 ‰ and is as the criterion.
Preferably, the amount that described dosing pump adds activator accounts for described solution A mass concentration with anionic polyacrylamide is as the criterion 0.5 ‰-6 ‰.
Preferably, the sludge quantity that described return-flow system refluxes is more than or equal in the body of described pond and gets mud, 1% of front mud total amount refluxes.
The invention solves the defect existed in background technology, there is following beneficial effect:
1. horizontal sedimentation tank of the present invention, with return-flow system, sludge part in the body of pond can be taken out and be back to Chi Tizhong again after modification, use this settling tank, the backflow of mud can substantially cover water and change, what reflux is the mud through modification in addition, and colloid in mud, organic taking-up are effective, produce water quality stabilizing.
2. horizontal sedimentation tank of the present invention, can be at existing horizontal sedimentation tank and micro-vortex " transform on settling tank and obtain, there is no on the one hand civil engineering work, save manpower, can utilize existing installations and facilities on the other hand, implementation cost is low.Only need two propulsion sources in return-flow system: sludge delivery pump and dosing pump, so system energy consumption is also low.Dosing pump is arranged on the sludge pipe stage casing, makes activator in the modified sewage sludge of backflow be combined with mud, thereby can not penetrate horizontal sedimentation tank pond body, does not affect subsequent technique.
3. the position control that sludge pipe is connected with reaction zone is no more than 1/2nd of reaction zone length, so that in the modified sewage sludge refluxed, the coagulation medicine has the more time to react with water in the body of pond, the best is 1/4th to 1/2nd places at reaction zone length.
4. sludge delivery pump can be selected variable frequency pump, according to the automatic regulating frequency of return-flow system flow, reduces energy consumption.
5. sludge pipe is except comprising the spoil disposal pipeline that connects zone of transition and reaction zone, other spoil disposal pipeline only be connected with zone of transition can also be set for according to circumstances with needs, directly discharging mud but not carry out the modification backflow.
6. reflow method of the present invention, in the modified sewage sludge of backflow polyacrylamide with the mud combination, can not penetrate horizontal sedimentation tank pond body affects subsequent technique.The chemical feeding quantity that is used for the anionic polyacrylamide of modified sewage sludge is controlled at the mass concentration 0.5 ‰-6 ‰ of solution A, has both saved medicament, can obtain good modified effect again.In addition, owing in the mud refluxed, also containing a large amount of coagulation medicines, can save the pharmaceutical chemicals of new input after therefore refluxing, the saving amount can reach approximately 30%.
7. the sludge quantity that return-flow system refluxes is adjusted according to water water quality, in the situation that water water quality is more stable, it is lower that quantity of reflux can be controlled in being not less than 1% scope, both guaranteed the effect that refluxes, and avoids waste again.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of the preferred embodiments of the present invention;
Fig. 2 is the system diagram of the preferred embodiments of the present invention;
In figure: 2, pond body, 4, water-in, 6, water outlet, 8, reaction zone, 12, zone of transition, 14, return-flow system.
Embodiment
The present invention is further detailed explanation in conjunction with the accompanying drawings and embodiments now, and these accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only shows the formation relevant with the present invention.
As shown in Figure 1-2, a kind of horizontal sedimentation tank with the sludge modification return-flow system, the water-in 4 and the water outlet 6 that comprise pond body 2 and be located at pond body 2 two ends, pond body 2 comprises is located at nearly water-in 4 one ends, the reaction zone 8 set gradually along water (flow) direction and zone of transition 12, also comprises the return-flow system 14 be connected with pond body 2.Return-flow system 14 comprises the sludge pipe that connects zone of transition 12 and reaction zone 8, and drive mud by zone of transition 12 through reflux the back sludge delivery pump of reaction zone 8 of sludge pipe, be provided with successively dosing pump and mud curing box along the mud throughput direction in the pipeline of sludge pipe, dosing pump adds activator for the mud to sludge pipe.
Concrete, return-flow system 14 comprise with zone of transition 12, is communicated with get the mud unit, the reflux unit be communicated with reaction zone 8, and the connection activation unit of getting mud unit and reflux unit.Getting the mud unit comprises the spoil disposal pipeline and is located at the sludge delivery pump in shore pipe road pipeline.Activation unit comprises the sludge carrier pipe road, the chemical tank and the dosing pump that with the sludge carrier pipe road, are communicated with, and the mud curing box of being located at sludge carrier pipe road tail end.Reflux unit comprises the reflux line be connected with the mud curing box and is located at the valve in reflux line.The spoil disposal pipeline comprises first a spoil disposal pipeline and two the second spoil disposal pipelines that are connected with zone of transition 12 respectively, and the first spoil disposal pipeline is communicated with the sludge carrier pipe road, for sludge modification, refluxes; The second spoil disposal pipeline is provided with valve, can be used for direct spoil disposal.The first spoil disposal pipeline, sludge carrier pipe road and reflux line connect to form the sludge reflux pipeline successively.The position that reflux line is connected with reaction zone 8 is 1/3rd to 1/2nd places along the water (flow) direction width at reaction zone 8.
Sludge delivery pump is variable frequency pump, according to the automatic regulating frequency of return-flow system 14 flow, is conducive to reduce energy consumption.Controller (not shown) can also be set in return-flow system 14 of the present invention, controller is electrically connected to the valve on sludge delivery pump and reflux line respectively, thereby the frequency according to water quality fluctuation fuzzy control sludge delivery pump, the mud amount is got in control, and return flow, control sludge back flow quantity, with lower cost, obtain suitable backflow effect.
Reflow method with the horizontal sedimentation tank of sludge modification return-flow system, comprise the steps:
(1) get mud by the first spoil disposal pipeline in pond body 2 zone of transition 12, by sludge delivery pump 8 backflows along the sludge carrier pipe road to reaction zone;
(2) dosing pump adds activator to the mud in the sludge carrier pipe road, is added with mud slaking in the mud curing box of activator, completes modification;
(3) mud after modification is back to the reaction zone 8 of pond body 2 along reflux line.
Concrete, in step (2), the aqueous solution that activator is anionic polyacrylamide, what join sludge pipe treats in returned sluge to form solution A, the amount that dosing pump adds activator accounts for solution A mass concentration with anionic polyacrylamide is as the criterion 0.5 ‰-6 ‰.
The mud curing box belongs to prior art, is a corrosion-resistant casing slowly stirred, and the control curing temperature is 5-50 ℃, and the curing time is 5-30min.
The sludge quantity that return-flow system 14 refluxes is more than or equal in pond body 2 and gets mud, 1% of front mud total amount refluxes.
Be back in the modified sewage sludge in pond body 2 reaction zones 8, due to also surplus, the coagulation medicine arranged, but the sustainable participation reaction is saved and newly added chemical reagent.
Above foundation desirable embodiment of the present invention is enlightenment, and by above-mentioned description, the related personnel can, in the scope that does not depart from this invention technological thought, carry out various change and modification fully.The technical scope of this invention is not limited to the content on specification sheets, must determine technical scope according to the claim scope.
Claims (9)
1. the horizontal sedimentation tank with the sludge modification return-flow system, the water-in and the water outlet that comprise the pond body and be located at body two ends, pond, described pond body comprises is located at nearly described water-in one end, the reaction zone set gradually along water (flow) direction and zone of transition, it is characterized in that: also comprise the return-flow system be connected with described pond body, described return-flow system comprises the sludge pipe that connects described zone of transition and reaction zone, and drive mud by zone of transition through reflux the back sludge delivery pump of reaction zone of sludge pipe, be provided with successively dosing pump and mud curing box along the mud throughput direction in the pipeline of described sludge pipe, described dosing pump adds activator for the mud to sludge pipe.
2. a kind of horizontal sedimentation tank with the sludge modification return-flow system according to claim 1, it is characterized in that: the position that described sludge pipe is connected with described reaction zone is no more than 1/2nd places of reaction zone along the water (flow) direction width.
3. a kind of horizontal sedimentation tank with the sludge modification return-flow system according to claim 1, it is characterized in that: the position that described sludge pipe is connected with described reaction zone is 1/4th to 1/2nd places along the water (flow) direction width at reaction zone.
4. a kind of horizontal sedimentation tank with the sludge modification return-flow system according to claim 1, it is characterized in that: described sludge delivery pump is variable frequency pump.
5. a kind of horizontal sedimentation tank with the sludge modification return-flow system according to claim 1, it is characterized in that: described sludge pipe comprises many spoil disposal pipelines that connect described zone of transition, part spoil disposal pipeline is connected with described reaction zone, and described spoil disposal pipeline is provided with valve.
6. a kind of horizontal sedimentation tank with the sludge modification return-flow system according to claim 1, it is characterized in that: the aqueous solution that described activator is anionic polyacrylamide, what join sludge pipe treats in returned sluge to form solution A, and the mass concentration that the amount that described dosing pump adds activator accounts for described solution A with anionic polyacrylamide is less than or equal to 6 ‰ and is as the criterion.
7. a kind of horizontal sedimentation tank with the sludge modification return-flow system according to claim 6 is characterized in that: the amount that described dosing pump adds activator accounts for described solution A mass concentration with anionic polyacrylamide is as the criterion 0.5 ‰-6 ‰.
8. a kind of horizontal sedimentation tank with the sludge modification return-flow system according to claim 1 is characterized in that: before the sludge quantity that described return-flow system refluxes is more than or equal in the body of described pond and gets mud, refluxes 1% of the mud total amount.
9. according to the reflow method of the described horizontal sedimentation tank with the sludge modification return-flow system of claim 1-8, it is characterized in that, comprise the steps:
(1) coupling end of described sludge pipe and pond body is got mud in zone of transition, by sludge delivery pump, along sludge pipe, to reaction zone, refluxes;
(2) described dosing pump adds activator to the mud in sludge pipe, is added with mud slaking in described mud curing box of activator, completes modification;
(3) the described mud after modification is back to described reaction zone along sludge pipe.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107804942A (en) * | 2016-09-08 | 2018-03-16 | 哈尔滨理工大学 | A kind of mine water treatment system of the acidity containing suspension |
| CN112358115A (en) * | 2020-09-28 | 2021-02-12 | 安徽普氏生态环境工程有限公司 | Efficient sludge backflow reinforced magnetic coagulation system and sedimentation method thereof |
| CN114702150A (en) * | 2022-03-30 | 2022-07-05 | 乾通环境科技(苏州)有限公司 | Pretreatment system for high-turbidity oil-containing seawater for small and medium-sized seawater desalination plants |
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| CN102020346A (en) * | 2010-12-19 | 2011-04-20 | 杭州（火炬）西斗门膜工业有限公司 | Efficient coagulating sedimentation basin |
| CN201848130U (en) * | 2010-11-18 | 2011-06-01 | 中国石油化工集团公司 | Activated sludge settling tank |
| CN202410256U (en) * | 2012-01-16 | 2012-09-05 | 中冶赛迪工程技术股份有限公司 | Circulating clarifier for sludge |
| CN203486952U (en) * | 2013-09-27 | 2014-03-19 | 乾通环境科技(苏州)有限公司 | Horizontal sedimentation tank with sludge modified backflow system |
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2013
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101172695A (en) * | 2007-10-15 | 2008-05-07 | 上海市政工程设计研究总院 | Centralized aerobic mud pulling sedimentation tank |
| CN201848130U (en) * | 2010-11-18 | 2011-06-01 | 中国石油化工集团公司 | Activated sludge settling tank |
| CN102020346A (en) * | 2010-12-19 | 2011-04-20 | 杭州（火炬）西斗门膜工业有限公司 | Efficient coagulating sedimentation basin |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107804942A (en) * | 2016-09-08 | 2018-03-16 | 哈尔滨理工大学 | A kind of mine water treatment system of the acidity containing suspension |
| CN112358115A (en) * | 2020-09-28 | 2021-02-12 | 安徽普氏生态环境工程有限公司 | Efficient sludge backflow reinforced magnetic coagulation system and sedimentation method thereof |
| CN114702150A (en) * | 2022-03-30 | 2022-07-05 | 乾通环境科技(苏州)有限公司 | Pretreatment system for high-turbidity oil-containing seawater for small and medium-sized seawater desalination plants |
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| CN103482744B (en) | 2016-01-20 |
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