CN105314816A - Sludge continuous dehydration device and sludge continuous dehydration method - Google Patents
Sludge continuous dehydration device and sludge continuous dehydration method Download PDFInfo
- Publication number
- CN105314816A CN105314816A CN201410302094.8A CN201410302094A CN105314816A CN 105314816 A CN105314816 A CN 105314816A CN 201410302094 A CN201410302094 A CN 201410302094A CN 105314816 A CN105314816 A CN 105314816A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- mud
- overflow groove
- sludge
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a sludge continuous dehydration device including: a pre-mixer which is communicated with a flocculant adding tank through a first addition pipeline and is communicated with a sludge suspension tank through a pipeline; a sludge lifting pump, which is communicated with an output end of the pre-mixer through a pipeline; a post-mixer which is communicated to the output end of the sludge lifting pump through a pipeline; an overflow groove which is communicated to the output end of the post-mixer through a pipeline, wherein an adjustment valve is disposed on the pipeline between the output end of the post-mixer and the output end of the overflow groove; a mixing trough which is connected to a sludge output end of the overflow groove and includes a mixing trough body, a separation board vertically disposed in the mixing trough body and dividing the space in the mixing trough body into a first space and a second space, wherein a stirring machine is installed in the second space, and an input end of the mixing trough is communicated with the first space and the output end of the mixing trough is communicated with the second space; and a spinning dehydrator, which is arranged at the output end of the mixing trough, wherein a spray apparatus is disposed above the spinning dehydrator.
Description
Technical field
The present invention relates to a kind of dewatering unit and method, particularly relate to a kind of sludge dehydration device and method.
Background technology
The waste water station primary recipient of usual cold rolled sheet factory comes from the trade effluent of pickling, cold rolling and coating unit.The mud produced in wastewater treatment process can enter sludge suspension pond and carry out aeration mixing, and adds flocculation agent and modulate, by sludge lifting pump delivery to sludge thickener.Sludge thickener adopts gravity concentration method, by top clean water overflow to secondary wastewater treatment system, be the solid-liquid mixture of 89% ~ 98% by base sludge initial concentration to water ratio, be delivered to plate-and-frame filter press by sludge delivery pump and carry out sludge dewatering treatment, moisture content of the cake after dehydration is about 75%, it is regularly transported outward after entering sludge bucket, and filtrate is then admitted to secondary wastewater treatment system and carries out reprocessing.
In above-mentioned waste water treatment process, sludge condensation and sludge dewatering are all the committed steps of wastewater treatment, but, but there is certain defect and constrain the development of wastewater treatment in these two steps existing.
The main purpose of sludge condensation and meaning are the volume reducing mud, reduce the pressure of follow-up structures or processing unit.At present, the method for sludge condensation has three kinds usually: gravity concentration, floatation thickening and mechanical thickening.The maintenance management of gravity concentration method and power cost low, but floor space is large, and sanitary condition is poor, and concentrated effect is not high, and concentrating particularly for lower concentrations of active mud, can not remove the moisture in mud effectively.Meanwhile, because mud is long in the gravity concentration tank residence time, in concentration basin, can anaerobic environment be formed, can have a negative impact to water treatment effect; Such as, rich phosphorous sludge can occur be in anaerobic environment in concentration process under serious to release phosphorus phenomenon, and the phosphor-removing effect of whole system is deteriorated.According to the mode of bubble formation, floatation thickening can be divided into: pressure air-dissolving air-float, biological air-dissolving air-float, cavitation air flotation, vacuum air supporting, chemical floatation, electrofloatation etc., the device that floatation thickening relates to is many, maintenance management is complicated, working cost is high, and sludge retention time is grown and had particular requirement for mud kind.Mechanical thickening comprises belt thickener, drum concentration and centrifugal concentrating etc., wherein, belt or drum concentration treatment capacity less, be difficult to the process being applied to large-scale mud, and washing water quantity is large, virtually adds wastewater flow rate; And the mud rate of recovery of centrifugal concentrating is low, energy-output ratio is large, equipment complex structure, is difficult to meet the demand of producing.
Gravity concentration method is the method that sludge thickener adopts usually, i.e. depositing technology, the sludge condensation effect adopting this technique to obtain and mud proportion, and the coupling between sludge settling time and concentration basin water inlet water flow has inseparable relation.But in actually operating, these processing parameters nearly all cannot regulate, cause sludge condensation effect unstable, affect follow-up sludge dewatering.
Sludge dewatering mainly adopts belt filter press, plate-and-frame filter press and centrifuge.Band press filter dewatering machine is the squeezing that the tension force of dependence strainer itself forms to sludge blanket, and by process that shearing force squeezes out the capillary water in sludge blanket, period needs continuous high pressure water to wash away strainer, and this adds water consumption in wastewater treatment process virtually.Meanwhile, because band press filter dewatering machine is operationally open type, therefore, adopt the work area environment of band press filter dewatering machine poor.Plate and frame(type)filter press is by the extruding of sheet frame, the water in mud is made to discharge to reach dehydration object by filter cloth, but the whole system of plate and frame(type)filter press is comparatively complicated, cover an area of large, equipment failure rate is high, and treatment capacity is little, operating pressure is low, and filter plate is fragile, filter cloth consumption is large, can not realize continuous operation.Meanwhile, the sheet frame of plate and frame(type)filter press is difficult to accomplish unmanned, and filter cloth usually needs labor cleaning, and operating environment is poor.Centrifuge relies on the centrifugal action dehydration that high speed rotating produces, and equipment maintenance cost is high, and noise is large, and energy consumption is high, and processing power is low and influence of fluctuations by sludge loading is larger.
In addition, wastewater treatment capacity due to plate-and-frame filter press is low and can not realize continuous operation, thus, a large amount of mud can accumulate in suspension pond and concentration basin, partial sludge overflows concentration basin and circulates in secondary wastewater treatment system, cause system spoil disposal not smooth, the COD content of draining rises gradually, affects the effect of wastewater treatment.
Summary of the invention
The object of the present invention is to provide a kind of mud continuously dehydrating device, the wastewater treatment capacity of this mud continuously dehydrating device is large, good waste water treatment effect and sludge retention time is short, can realize continuous operation.Meanwhile, the compact construction of mud continuously dehydrating device, floor space is little, runs and maintenance cost is low and water consumption is few.
To achieve these goals, the present invention proposes a kind of mud continuously dehydrating device, it comprises:
Premixer, its input terminus adds pipeline by first and is communicated with flocculant concentration pond, and first adds pipeline is provided with flocculant concentration pump and one-level adds valve, and the input terminus of premixer also passes through pipeline connection with sludge suspension pond;
Sludge lifting pump, passes through pipeline connection between its input terminus and output terminal of premixer;
Rear mixing tank, passes through pipeline connection between its input terminus and sludge lifting delivery side of pump;
Overflow groove, its input terminus is communicated with by the output terminal of pipeline with rear mixing tank, and the pipeline between rear mixing tank output terminal and overflow groove input terminus is provided with variable valve;
Tempering tank, its input terminus is connected with the mud output terminal of overflow groove, and tempering tank comprises: tempering tank body; Be erected in the intrinsic dividing plate of tempering tank, intrinsic for tempering tank separated by spaces is the first space and second space by this dividing plate, and stirrer is located in second space, and the input terminus of tempering tank is communicated with the first space, and the output terminal of tempering tank is communicated with second space;
Rotating-expressing type water extracter, it is located at the output of tempering tank, and the top of rotating-expressing type water extracter is provided with spray equipment;
In addition, be also connected with second and add pipeline between the second space of flocculant concentration pump and tempering tank body, second adds pipeline is provided with secondary and adds valve; In overflow groove liquid level height higher than tempering tank internal partition upper along height.
Rotating-expressing type water extracter is have employed in technical scheme of the present invention, compare to existing plate-and-frame filter press, rotating-expressing type water extracter stable equipment operation, process waste water can be run continuously, thus, the wastewater treatment capacity that have employed the mud continuously dehydrating device of rotating-expressing type water extracter is large and operation expense is low.Meanwhile, due to the compact construction of rotating-expressing type water extracter, volume is little, can break through the restriction in waste water processing station place and widespread use.
Rotating-expressing type water extracter all has higher requirement for the water ratio of mud and flow, and the moisture percentage in sewage sludge of general requirement input is 95-98%, constant flow ripple disable.In the prior art, mud and flocculation agent after suspension pond mixes, then enter concentration basin and carry out flocculating settling, in order to reduce the water ratio of base sludge.But, the fluctuation of concentration basin base sludge water ratio is comparatively large, usually between the scope of 89%-98%, is difficult to the process requirements meeting rotating-expressing type water extracter.In addition, if directly get mud bottom concentration basin, then sludge dewatering effect can be affected.
In order to obtain comparatively stable low moisture percentage in sewage sludge and good separating effect, when not arranging concentration basin, technical scheme of the present invention is by arranging premixer, sludge lifting pump, rear mixing tank, the valve that the connecting pipeline between overflow groove, tempering tank and rotating-expressing type water extracter and each equipment and pipeline are arranged and pump realize the mud continuously dehydrating technique of 2 inputs+multistage mixing+twice adjustment+spinning dehydration.
In mud continuously dehydrating device of the present invention, premixer can adopt publication number for pre-mixing device disclosed in the patent of CN202778297U, it comprises the shell of a tubulose, along the flow direction of liquid, the inwall of this shell has the first straight section, conical section and the second straight section that are connected successively, the diameter of the second straight section is less than the diameter of the first straight section, first straight section has an annular groove, shell also offers a medicament inlet, this medicament inlet and groove conducting; Be sheathed in shell in a tubulose; Inner sleeve has first paragraph and second segment, the external diameter of first paragraph is greater than the external diameter of second segment, and first paragraph is closely fixedly connected with shell, second segment and groove form a medicament buffer zone, the second segment of inner sleeve also forms a circular clearance with the first straight section of shell, and this circular clearance is connected with described medicament buffer zone and conducting.
In mud continuously dehydrating device of the present invention, rear mixing tank can adopt publication number be the patent of CN202778296U disclosed after mixing device, it comprises a protecgulum, and it has a cavity, the front end of protecgulum offers a upstream nozzle, and this upstream nozzle is communicated with the cavity of protecgulum; The Impactor of a hollow, it has a coupling end and a conical ends, and coupling end is connected with the rear end of protecgulum, is all located in the cavity of protecgulum to make conical ends, conical ends offers a downstream nozzle, and the coaxial or almost coaxial of downstream nozzle and upstream nozzle is arranged; The structure of rear mixing device is arranged with the axle center rotational symmetry of upstream nozzle or downstream nozzle.
Flocculation agent adds pipeline by flocculant concentration pump, first and is arranged at the first one-level added on pipeline and adds valve and be added in premixer to complete first input, like this, the mud coming from sludge suspension pond and the flocculation agent coming from flocculant concentration pond can carry out one-level mixing in premixer.In one-level mixing, flocculation agent is introduced in the medicament buffer zone of premixer, then enters mixing zone by circular clearance, the last mud generation recirculate mixing with entering in premixer.In premixer, the circular nature of circular clearance makes flocculation agent contact more equably with mud, after flocculation agent mixes with mud, under the shearing action in frictional belt, there is the exchange of energy, quality, produce and entrainment backflow, finally, flocculation agent and mud mixing are close to even, flow velocity reaches unanimity, and shows the flow characteristics of pipe stream completely, thus forms the vortex micelle of big scale.The Main Function of one-level mixing utilizes water conservancy to be diffused into fast in added current by flocculation agent, and mix with mud.
Premixer in technical scheme of the present invention have employed jet current principle.Because the space in pipeline is limited, the jet of device belongs to Confined space jet.
Mixed flocculation agent and mud realize secondary mixing by the stirring action of sludge lifting pump to mixed stream, the flocculation agent just added is made first to form the vortex group of big scale, under the effect of drawing force and shearing force, maelstrom group splits into the less vortex group of yardstick, energy is delivered to little vortex group from maelstrom group, makes secondary mix and is provided with back-mixing character.Secondary mixing is a kind of mechanical agitation process of high strength.
The mixed stream exported by sludge lifting pump enters into rear mixing tank to realize three grades of mixing.This rear mixing tank make use of fluid self-sustained oscillation principle, allows the mixed stream stirred through high strength collide in self-sustained oscillation district and Impactor, produces violent eddy current.Under very strong shear action, the fine fraction of fluid is mixed by splitting further, improves mixing efficiency.Meanwhile, because the flowing of the fluid in rear mixing tank encounters obstruction, thus stabilize the even fluidised form of fluid.Three grades of mixing are a kind of static mixing.
After above-mentioned one-level, secondary and three grades of mixing, a large amount of suspended substances in flocculation agent and mud mix, complete first time mixed flocculation reaction, a large amount of wadding grains is created in mixed stream, to make technical scheme of the present invention without the need to arranging the concentration basin carrying out flocculating settling, the processing step that namely can be postorder creates good dehydration conditions.
In addition, flocculation agent also add pipeline by flocculant concentration pump, second and be arranged at the second secondary added on pipeline add valve be added in the second space of tempering tank body with complete second point throw in, like this, the mixed stream coming from overflow groove and the flocculation agent coming from flocculant concentration pond dynamically can mix in tempering tank.Dynamic mixing mainly adopts whipping device, in steel basin, input mechanical energy by the rotation of blade at whipping process, thus make fluid obtain suitable flow location form, and in flow field, carry out the transmission of kinetic energy, heat and quality or carry out the process of chemical reaction.In whipping process, the feature of current is that it has the character of back-mixing.After three grades of mixed mixed streams enter tempering tank, owing to the addition of flocculation agent in the second space of tempering tank, under stirrer at the uniform velocity stirs, mixed stream completes the reaction of second time mixed flocculation, now, form mud flco after wadding grain contacts with other granular absorption again, this mud flco can meet the requirement of rotating-expressing type water extracter for sludge moisture content.
Technical scheme of the present invention by arranging variable valve, by Flow-rate adjustment to the identical treatment capacity of rotating-expressing type water extracter, to realize the Primary regulation of mud continuously dehydrating device.In addition, also by arranging overflow groove, by mixed stream from pressure fluid become constant from fluid to ensure the stability of fluid, thus achieve the Secondary Control of mud continuously dehydrating device.For this reason, be provided with variable valve+overflow groove and mixed stream after achieving Secondary Control has stable flow and normal pressure, the requirement of rotating-expressing type water extracter for mud discharge can be met.
In addition, add valve and secondary by one-level and add the amount that valve can control the flocculation agent added in the second space of premixer and tempering tank respectively.
In addition, because intrinsic for tempering tank separated by spaces is the first space and second space by the dividing plate that arranges in tempering tank, mixed stream is introduced into after to the first space, then overflow is uniformly mixed to second space, and therefore, dividing plate has the effect of stable water body.
It should be noted that, in overflow groove, the height of liquid level higher than the upper edge height of tempering tank internal partition, otherwise must will affect the water outlet of tempering tank.
Further, in mud continuously dehydrating device of the present invention, above-mentioned first adds pipeline and/or second adds pipeline and is provided with under meter, adjusts the injected volume of flocculation agent with handled easily personnel at any time according to wastewater treatment capacity.
Further, in mud continuously dehydrating device of the present invention, the upstream and downstream of above-mentioned variable valve is also respectively equipped with upstream service valve and downstream service valve, pipeline between above-mentioned downstream service valve and the input terminus of overflow groove is also connected with bypass line, this bypass line is connected to sludge suspension pond, this bypass line is provided with by-pass valve and reverse flow valve, is also connected with pipeline between this reverse flow valve and upstream service valve.
The upstream and downstream pipe of variable valve are separately installed with two service valves, and by-pass valve is located on the bypass line of pipeline between downstream service valve and the input terminus of overflow groove, and reverse flow valve is then located on the pipeline between itself and upstream service valve.Service valve can facilitate the maintenance of variable valve after opening.By-pass valve just straight-through later process after opening, without the need to through Primary regulation.Reverse flow valve after opening mud just can be back to sludge suspension pond.The effect of these valves is in abnormal cases above, is guaranteed the continuous operation of mud continuously dehydrating device by artificial adjust flux, thus reduces the repeatedly starting and stopping of sludge lifting pump.
Further, in mud continuously dehydrating device of the present invention, the pipeline between the output terminal of above-mentioned rear mixing tank and the input terminus of overflow groove is provided with total flowmeter for pipe.
Because the flow of the mixed stream after being adjusted by variable valve needs consistent with the treatment capacity of rotating-expressing type water extracter or basically identical, therefore, need to arrange total flowmeter for pipe on the pipeline between the output terminal and the input terminus of overflow groove of rear mixing tank, be beneficial to the flow that operator adjust mixed stream in time.
Further, in mud continuously dehydrating device of the present invention, above-mentioned overflow groove comprises:
Overflow groove body;
Upflow tube, it is located in overflow groove body, and so that upflow tube internal space and upflow tube space outerpace two parts are distinguished in intrinsic for overflow groove space, this upflow tube internal space is communicated with the overflowing liquid relief outlet of overflow groove;
Adjustment cap, it is connected to the top of upflow tube, and is set to move along the axial direction due of upflow tube, to adjust the height on the upper edge of upflow tube.
After mixed stream enters overflow groove, small portion in mixed stream is discharged by adjustment cap and upflow tube, major part in mixed stream enters in the first space of tempering tank by mud output terminal, mixed stream becomes constant in fluid from pressure fluid in this process, like this, just ensure that the stable of fluid.The axial motion of upflow tube by adjustment shade, the liquid level of overflow groove and corresponding spillway discharge can be adjusted.But be in course of adjustment, the liquid level in overflow groove remains the upper edge height higher than tempering tank internal partition, to avoid the water outlet difficulty of tempering tank.
Further, in mud continuously dehydrating device of the present invention, the overflowing liquid relief outlet of above-mentioned overflow groove is connected to sludge suspension pond by pipeline, and this pipeline is provided with surplus valve.
Overflowing liquid is back in sludge suspension pond by pipeline, makes it be back in sludge suspension pond the sludge dewatering treatment started next time.
Further, in mud continuously dehydrating device of the present invention, above-mentioned tempering tank is interior is provided with a baffle plate near tempering tank output, and the upper edge of this baffle plate is highly more than or equal to the upper along height of tempering tank internal partition, and the upper edge of this baffle plate is highly lower than the height of liquid level in overflow groove.
Further, in mud continuously dehydrating device of the present invention, the output terminal of above-mentioned tempering tank is set to: export the angle of mud for 45 ° obliquely, so that mud is transported to rotating-expressing type water extracter place.
Correspondingly, the invention allows for a kind of mud continuously dehydrating method adopting mud continuously dehydrating device mentioned above to carry out, can realize continuity sludge dewatering by the method, sludge retention time is short and water consumption is few.Moisture percentage in sewage sludge after dehydration is low, has good sludge dewatering effect.
For this reason, mud continuously dehydrating method provided by the invention comprises: be added to by polyacrylamide in flocculant concentration pond, and the dosage of polyacrylamide is≤3kg/ ton feed sludge.
In the inventive solutions, flocculation agent adopts polyacrylamide (PAM).Polyacrylamide (PAM) has the function of electrostatic neutralization and adsorption bridging, and it can change the character of mud, is conducive to the polymerization of mud, makes the mud degree of compactness after precipitation high, to reach the effect reducing moisture percentage in sewage sludge.PAM by with water agitation and dilution after form high viscosity liquid and add respectively in the second space of premixer and tempering tank body.
In addition, efficiently, reliably can carry due to pneumatic diaphragm pump and have chemistry and/or mechanical erosion and the high viscosity fluid of the different slurry of concentration or paste, flocculation agent can be thrown in by pneumatic diaphragm pump in the inventive solutions.
Further, in mud continuously dehydrating method of the present invention, adding by one-level the part by weight that valve and secondary add the flocculation agent that valve adds is 1:1, ensures that the amount of first flocculation agent thrown in is identical with the amount of the flocculation agent that second point is thrown in.
Further, in mud continuously dehydrating method of the present invention, above-mentioned variable valve is adopted to be adjusted to by the mud discharge exported after the process of sludge lifting pump equal with the unit time treatment capacity of rotating-expressing type water extracter, to ensure the stability of mud continuously dehydrating.
Further, in mud continuously dehydrating method of the present invention, the rotating speed of above-mentioned stirrer is controlled as 20-50r/min.
The hybrid reaction of mud in tempering tank has been come primarily of stirrer.When the stirring intensity of stirrer is too low, easily cause hybrid reaction uneven, when the stirring intensity of stirrer is too high, then easy flco to be smashed, so, stirrer rotating speed is set to 20 ~ 50r/min.
Mud continuously dehydrating device of the present invention is owing to have employed technique scheme, and it has larger wastewater treatment capacity, good water treatment effect and sludge retention time is short.
In addition, mud continuously dehydrating device of the present invention can realize successional dehydrating operation.
In addition, the compact construction of mud continuously dehydrating device of the present invention, floor space is little, runs and maintenance cost is low and water consumption is few.
Moisture percentage in sewage sludge after mud continuously dehydrating method of the present invention process is low, and sludge dewatering is effective.
In addition, mud continuously dehydrating method of the present invention can realize continuity sludge dewatering, and sludge retention time is short and water consumption is few.
Accompanying drawing explanation
Fig. 1 is the structural representation of mud continuously dehydrating device of the present invention under a kind of embodiment.
Fig. 2 is the schematic flow sheet of mud continuously dehydrating method of the present invention under a kind of embodiment.
Embodiment
Below by according to specific embodiment to mud continuously dehydrating device of the present invention with adopt this device mud continuously dehydrating method of carrying out to make to further illustrate, but specific embodiment and related description do not form the improper restriction for technical scheme of the present invention.
Fig. 1 shows the structure of mud continuously dehydrating device of the present invention under a kind of embodiment.
Arrow in FIG represents the flow direction of fluid on this pipeline.
As shown in Figure 1, the mud continuously dehydrating device 1 under this embodiment comprises: premixer 11, sludge lifting pump 12, rear mixing tank 13, overflow groove 14, tempering tank 15, rotating-expressing type water extracter 16, first-class gauge 17, second gauge 18 and mass flow meters 19.The input terminus 111 of premixer 11 adds pipeline 21 by first and is communicated with flocculant concentration pond 20, first adds and pipeline 21 is provided with flocculant concentration pump 211 and one-level adds valve 212, and the input terminus 111 of premixer 11 also passes through pipeline connection with sludge suspension pond 10; Pipeline connection is passed through between the input terminus 121 of sludge lifting pump 12 and the output terminal 112 of premixer 11; Also pipeline connection is passed through between the input terminus 131 of rear mixing tank 13 and the output terminal 122 of sludge lifting pump 12; The input terminus 141 of overflow groove 14 is communicated with by the output terminal 132 of pipeline with rear mixing tank 13, and the pipeline between the output terminal 132 of rear mixing tank 13 and the input terminus 141 of overflow groove 14 is provided with variable valve 23; The input terminus 151 of tempering tank 15 is connected with the mud output terminal 142 of overflow groove 14, rotating-expressing type water extracter 16 is arranged at output terminal 152 place of tempering tank 15, spray equipment 161 is provided with above rotating-expressing type water extracter 16, control flow by water supply electromagnetic valve 29, with timing, spray irrigation is carried out to rotating-expressing type water extracter inside.
As shown in Figure 1, tempering tank 15 comprises: tempering tank body 153, is erected in the intrinsic dividing plate 154 of tempering tank, and near the baffle plate 155 that output terminal 152 place of tempering tank 15 is arranged.Wherein, separated by spaces in tempering tank body 153 is the first space 156 and second space 158 by dividing plate 154, stirrer 157 is arranged in second space 158, and the input terminus 151 of tempering tank 15 is communicated with the first space 156, and the output terminal 152 of tempering tank 15 is communicated with second space 158; Between flocculant concentration pump 211 and the second space 158 of tempering tank body 153, be also connected with second add pipeline 22, add second and pipeline 22 is provided with secondary adds valve 221.In order to mixed stream being delivered to rotating-expressing type water extracter 16 place, the output terminal 152 of tempering tank 15 is arranged so that the angle exporting mud is downward-sloping 45 °.
In addition, add pipeline 21 and second first and add on pipeline 22 and be respectively arranged with first-class gauge 17 and second gauge 18, the pipeline between the output terminal 132 and the input terminus 141 of overflow groove 14 of rear mixing tank 13 is also provided with total flowmeter for pipe 19.
As shown in Figure 1, overflow groove 14 comprises: overflow groove body 143, upflow tube 144 and adjustment cap 145.Wherein, upflow tube 144 is located in overflow groove body 143, with by intrinsic for overflow groove spatial division for upflow tube internal space 146 and upflow tube space outerpace 148 two parts, upflow tube internal space 146 is communicated with the overflowing liquid relief outlet 147 of overflow groove 14, so that overflowing liquid is expelled to sludge suspension pond 10; Adjustment cap 145 is connected to the top of upflow tube 144, and be set to move along the axial direction due of upflow tube, upper along height with what adjust upflow tube, in overflow groove, the height of liquid level must higher than the upper height along height and tempering tank output baffle plate of tempering tank internal partition.
In addition, the top of adjustment cap 145 can be set to saw-tooth-type structures, to stop that in flooding process larger floccules run off, ensure the settling time of their abundances.
Continue to consult Fig. 1, the upstream and downstream of variable valve 23 is also respectively equipped with upstream service valve 24 and downstream service valve 25, pipeline between downstream service valve 25 and the input terminus 141 of overflow groove 14 is also connected with bypass line, this bypass line is connected to sludge suspension pond 10, bypass line is provided with by-pass valve 26 and reverse flow valve 27, between this reverse flow valve 27 and upstream service valve 24, is also connected with pipeline.In addition, be connected with sludge suspension pond 10 by pipeline at the overflowing liquid relief outlet 147 of overflow groove 14, this pipeline is provided with surplus valve 28.
Fig. 2 shows the flow process of mud continuously dehydrating method of the present invention under a kind of embodiment.
As shown in Figure 2, the mud continuously dehydrating method that mud continuously dehydrating device under the present embodiment carries out, comprising:
I) be added in flocculant concentration pond by flocculation agent polyacrylamide, the dosage of polyacrylamide is≤3kg/ ton feed sludge;
II) adding by one-level the part by weight that valve and secondary add the flocculation agent that valve adds is 1:1;
III) variable valve is adopted to be adjusted to by the mud discharge exported after the process of sludge lifting pump equal with the unit time treatment capacity of rotating-expressing type water extracter;
IV) be 20-50r/min by the speed setting of stirrer;
The water ratio of the dehydrated sludge cake V) obtained after the dehydration of rotating-expressing type water extracter is about 73% ~ 77%.
On the basis of Fig. 1, consult Fig. 2, the operational process of the mud continuously dehydrating device of employing present embodiment is:
1) polyacrylamide (PAM) is added in flocculant concentration pond forms the aqueous solution with water proportioning, the dosage of polyacrylamide is≤3kg/ ton feed sludge, then by flocculant concentration pump 211, flocculation agent is delivered in the second space 158 of premixer 11 and tempering tank 15, its flow being delivered to each point all adds by one-level the control that valve 212 and secondary add valve 221, add after valve 212 adds valve 221 with secondary in one-level and be all provided with subflow gauge 17,18.
2) mud coming from sludge suspension pond 10 is carried by sludge lifting pump 12, be uniformly mixed to form the mixed stream (one-level mixes) of mud+flocculation agent in advance by premixer 11 and flocculation agent before mud enters sludge lifting pump 12, enter again in sludge lifting pump 12 and carry out stirring (secondary mixing), then after the output of the output terminal 122 of sludge lifting pump 12, the static mixing (three grades of mixing) of mixed stream is there is in rear mixing tank 13, at this, achieve first time mixed flocculation.According to the numerical value of total flowmeter for pipe 19, adjustment variable valve 23, make the mud discharge in pipeline reach the treatment capacity of rotating-expressing type water extracter, unnecessary mixed stream is then back to sludge suspension pond 10.
3) mixed stream enters in overflow groove 14 by the input terminus 141 of overflow groove 14, unnecessary mixed stream is back to sludge suspension pond 10 by upflow tube 144, remaining mixed stream is then introduced into the first space 156 of tempering tank 15, the second space 158 of tempering tank 15 is entered after overflow, because flocculation agent is carried in the second space 158 of tempering tank 15 by flocculant concentration pump 211, at this, achieve secondary mixed flocculation.
4) enter rotating-expressing type water extracter 16 through the reacted mixed stream of secondary mixed flocculation by the output terminal 152 of tempering tank 15, after mechanical dehydration, isolate mud cake and filtrate.Mud cake is discharged by the mud mouth 162 of rotating-expressing type water extracter 16 and is delivered to sludge bucket 4.After filtrate then enters water leg 5, be recovered in secondary waste water treatment system 6.In rotating-expressing type dehydration, the filter seam of shower 161 timing to rotating-expressing type water extracter cleans.
It should be noted that above enumerate be only specific embodiments of the invention, obviously the invention is not restricted to above embodiment, have many similar changes thereupon.If all distortion that those skilled in the art directly derives from content disclosed by the invention or associates, protection scope of the present invention all should be belonged to.
Claims (12)
1. a mud continuously dehydrating device, is characterized in that, comprising:
Premixer, its input terminus adds pipeline by first and is communicated with flocculant concentration pond, and first adds pipeline is provided with flocculant concentration pump and one-level adds valve, and the input terminus of premixer also passes through pipeline connection with sludge suspension pond;
Sludge lifting pump, passes through pipeline connection between its input terminus and output terminal of premixer;
Rear mixing tank, passes through pipeline connection between its input terminus and sludge lifting delivery side of pump;
Overflow groove, its input terminus is communicated with by the output terminal of pipeline with rear mixing tank, and the pipeline between described rear mixing tank output terminal and overflow groove input terminus is provided with variable valve;
Tempering tank, its input terminus is connected with the mud output terminal of overflow groove, and described tempering tank comprises: tempering tank body; Be erected in the intrinsic dividing plate of tempering tank, intrinsic for tempering tank separated by spaces is the first space and second space by this dividing plate, stirrer is located in described second space, and the input terminus of tempering tank is communicated with described first space, and the output terminal of tempering tank is communicated with described second space;
Rotating-expressing type water extracter, it is located at the output of tempering tank, and the top of described rotating-expressing type water extracter is provided with spray equipment; In addition
Also be connected with second between described flocculant concentration pump and the second space of tempering tank body and add pipeline, described second adds pipeline is provided with secondary and adds valve;
In described overflow groove liquid level height higher than tempering tank internal partition upper along height.
2. mud continuously dehydrating device as claimed in claim 1, is characterized in that, described first adds pipeline and/or second adds pipeline and be provided with under meter.
3. mud continuously dehydrating device as claimed in claim 1, it is characterized in that, the upstream and downstream of described variable valve is also respectively equipped with upstream service valve and downstream service valve, pipeline between described downstream service valve and the input terminus of overflow groove is also connected with bypass line, this bypass line is connected to sludge suspension pond, this bypass line is provided with by-pass valve and reverse flow valve, is also connected with pipeline between this reverse flow valve and upstream service valve.
4. mud continuously dehydrating device as claimed in claim 1, it is characterized in that, the pipeline between the output terminal of described rear mixing tank and the input terminus of overflow groove is provided with total flowmeter for pipe.
5. mud continuously dehydrating device as claimed in claim 1, it is characterized in that, described overflow groove comprises:
Overflow groove body;
Upflow tube, it is located in described overflow groove body, and so that upflow tube internal space and upflow tube space outerpace two parts are distinguished in intrinsic for overflow groove space, described upflow tube internal space is communicated with the overflowing liquid relief outlet of overflow groove;
Adjustment cap, it is connected to the top of upflow tube, and is set to move along the axial direction due of upflow tube, to adjust the height on the upper edge of upflow tube.
6. mud continuously dehydrating device as claimed in claim 1, it is characterized in that, the overflowing liquid relief outlet of described overflow groove is connected to sludge suspension pond by pipeline, and this pipeline is provided with surplus valve.
7. mud continuously dehydrating device as claimed in claim 1, it is characterized in that, described tempering tank is interior is provided with a baffle plate near tempering tank output, and the upper edge of this baffle plate is highly more than or equal to the upper along height of tempering tank internal partition, and the upper edge of this baffle plate is highly lower than the height of liquid level in overflow groove.
8. mud continuously dehydrating device as claimed in claim 1, it is characterized in that, the output terminal of described tempering tank is set to: export the angle of mud for 45 ° obliquely.
9. adopt the mud continuously dehydrating method as the mud continuously dehydrating device in claim 1-8 as described in any one carries out, it is characterized in that: be added to by polyacrylamide in flocculant concentration pond, the dosage of polyacrylamide is≤3kg/ ton feed sludge.
10. mud continuously dehydrating method as claimed in claim 9, is characterized in that: adding by one-level the part by weight that valve and secondary add the flocculation agent that valve adds is 1:1.
11. mud continuously dehydrating methods as claimed in claim 9, is characterized in that: adopt described variable valve to be adjusted to by the mud discharge exported after the process of sludge lifting pump equal with the unit time treatment capacity of rotating-expressing type water extracter.
12. mud continuously dehydrating methods as claimed in claim 9, is characterized in that: control the rotating speed of described stirrer for 20-50r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410302094.8A CN105314816B (en) | 2014-06-27 | 2014-06-27 | A kind of sludge continuous dehydration apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410302094.8A CN105314816B (en) | 2014-06-27 | 2014-06-27 | A kind of sludge continuous dehydration apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105314816A true CN105314816A (en) | 2016-02-10 |
| CN105314816B CN105314816B (en) | 2018-01-30 |
Family
ID=55243249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410302094.8A Active CN105314816B (en) | 2014-06-27 | 2014-06-27 | A kind of sludge continuous dehydration apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105314816B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106673394A (en) * | 2016-12-30 | 2017-05-17 | 吴惠霞 | System and method for dewatering in slurry field |
| CN108996870A (en) * | 2018-07-25 | 2018-12-14 | 成都市兴蓉再生能源有限公司 | A method of improving landfill leachate sludge dewatering effect |
| AU2017201985B2 (en) * | 2016-03-23 | 2019-05-23 | Tata Consultancy Services Limited | Portable test-device for selective flocculation |
| CN112811784A (en) * | 2021-02-06 | 2021-05-18 | 江苏康德龙环保有限公司 | Continuous sludge dewatering, concentrating and stirring equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10235398A (en) * | 1997-02-28 | 1998-09-08 | Nkk Corp | Sludge treatment |
| CN102267797A (en) * | 2011-07-25 | 2011-12-07 | 中国船舶重工集团公司第七○二研究所 | Integral process for ecologically desilting and curing sludge |
| CN103657497A (en) * | 2012-08-30 | 2014-03-26 | 宝山钢铁股份有限公司 | Three-level mixing system used for liquid mixing |
-
2014
- 2014-06-27 CN CN201410302094.8A patent/CN105314816B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10235398A (en) * | 1997-02-28 | 1998-09-08 | Nkk Corp | Sludge treatment |
| CN102267797A (en) * | 2011-07-25 | 2011-12-07 | 中国船舶重工集团公司第七○二研究所 | Integral process for ecologically desilting and curing sludge |
| CN103657497A (en) * | 2012-08-30 | 2014-03-26 | 宝山钢铁股份有限公司 | Three-level mixing system used for liquid mixing |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2017201985B2 (en) * | 2016-03-23 | 2019-05-23 | Tata Consultancy Services Limited | Portable test-device for selective flocculation |
| CN106673394A (en) * | 2016-12-30 | 2017-05-17 | 吴惠霞 | System and method for dewatering in slurry field |
| CN106673394B (en) * | 2016-12-30 | 2023-08-04 | 吴惠霞 | System and method for on-site dehydration of slurry |
| CN108996870A (en) * | 2018-07-25 | 2018-12-14 | 成都市兴蓉再生能源有限公司 | A method of improving landfill leachate sludge dewatering effect |
| CN112811784A (en) * | 2021-02-06 | 2021-05-18 | 江苏康德龙环保有限公司 | Continuous sludge dewatering, concentrating and stirring equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105314816B (en) | 2018-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2021036459A1 (en) | Vertical-flow type precipitation and air floatation device for water treatment and working method therefor | |
| CN209081510U (en) | Sewage integrated treatment device | |
| CN105314816A (en) | Sludge continuous dehydration device and sludge continuous dehydration method | |
| CN201890788U (en) | Double-layered pressure type oil remover | |
| CN208485650U (en) | A kind of dyeing waste water classification flocculation deposition apparatus | |
| CN204151193U (en) | Waste Water Treatment | |
| CN109939575B (en) | Powder polyacrylamide dissolving device | |
| CN104529027B (en) | Guanite grain crystalline method removes the device of phosphate in waste water | |
| CN206538241U (en) | A kind of the coagulation deposition integral equipment | |
| CN105384230A (en) | Cellulose wastewater pretreatment apparatus and application thereof | |
| CN203128277U (en) | Dosing flocculation basin | |
| KR100310043B1 (en) | Instantaneously mixing method of chemical by hydraulic turbulence | |
| CN110124547B (en) | Liquid mixing tank | |
| CN209210519U (en) | A kind of house refuse terminal Leachate site preprocessing module device | |
| CN208454677U (en) | A kind of high-efficiency dissolued-air air-floating apparatus based on waterpower principle | |
| CN105906146A (en) | New ectin wastewater treatment process and device | |
| CN115231729A (en) | Full-automatic control operation's high-efficient dissolved air flotation device | |
| CN205999183U (en) | Sewage disposal system | |
| CN209024326U (en) | A kind of oil conte, sewage treatment device | |
| CN108946936B (en) | UASB reactor with pulse water distribution | |
| CN207811312U (en) | A kind of mixer and dissolved air floatation device | |
| RU110368U1 (en) | WATER TREATMENT PLANT USING PRESSURE FLOTATION | |
| CN110228912A (en) | The source separation removal device of the Phosphorus pollutant of municipal wastewater treatment plant thickened sludge water | |
| CN204981223U (en) | Novel cavitation air supporting machine | |
| CN211445472U (en) | Belt type filter press |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |