CN103253844A - Foldable screw type sludge dewatering machine with electroosmotic dewatering function - Google Patents
Foldable screw type sludge dewatering machine with electroosmotic dewatering function Download PDFInfo
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- CN103253844A CN103253844A CN2013101588995A CN201310158899A CN103253844A CN 103253844 A CN103253844 A CN 103253844A CN 2013101588995 A CN2013101588995 A CN 2013101588995A CN 201310158899 A CN201310158899 A CN 201310158899A CN 103253844 A CN103253844 A CN 103253844A
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Abstract
The invention discloses a foldable screw type sludge dewatering machine with an electroosmotic dewatering function, relates to the technical field of sludge dewatering equipment in a water treatment industry, and aims at the problems that the dewatering of existing mechanical squeezing type dewatering equipment has the upper limit and cannot reach national regulation. The foldable screw type sludge dewatering machine comprises a cylinder and a reducing spiral shaft, wherein the cylinder comprises a movable ring set consisting of a plurality of movable rings which are mutually overlapped and are sleeved on a screw rod, and movable ring cushion blocks; fixed rings are further arranged in a gap between each two adjacent movable rings to form a fixed ring set; the reducing spiral shaft is arranged in the cylinder and is coaxial to the cylinder; the reducing spiral shaft is provided with a spiral blade; the inner sides of the movable rings and the fixed rings are in clearance fit with the spiral blade; the cylinder is connected with a positive pole of a direct-current power supply; and the reducing spiral shaft is connected with a negative pole of the direct-current power supply. The foldable screw type sludge dewatering machine with the electroosmotic dewatering function disclosed by the invention is particularly suitable for municipal wastewater treatment and industrial wastewater treatment systems and can be used for carrying out dewatering treatment on sludge.
Description
Technical field
The present invention relates to the device for dehydrating sladge waste technical field in the water treatment field, be specifically related to a kind of folded spiral shell formula sludge dewatering equipment with electroosmotic dewatering function.
Background technology
Sludge dewatering is link very important in the sewage treatment process, and this link need be finished two works for the treatment of: separate the precipitation mud in the sewage of finishing harmless treatment (1); (2) its water ratio of mud of process initial gross separation must be to its decrement of dewatering up to 99 ﹪, and the sludge volume after the dehydration decrement is greatly dwindled, and is beneficial to mud and carries out follow-up engineerings such as landfill, burning.In general, the water ratio after the sludge dewatering decrement is the mud cake state about 80 ﹪, and volume-diminished is to 20～30 original ﹪.
Dewatering technology of mud roughly is divided into following a few class: (1) mechanical expression formula; (2) heat drying formula; (3) osmosis formula.The equipment that mechanical expression formula dewatering process adopts such as plate and frame(type)filter press, belt filter press, folded spiral shell formula sludge dewatering equipment, centrifugal drier etc.; Equipment such as ultra-sonic oscillation water extracter that heat drying formula dewatering process adopts, rotating disc type sludge drying machine etc.; Osmosis formula dewatering process causes that in recent years industry extensively payes attention to, and its dehydration mechanism has been made theoretic exploration and demonstration, and confirming as is a kind of sludge dewatering novel process of less energy-consumption.But Shang Weijian adopts the pertinent literature record of the sludge dewatering equipment of electroosmotic dewatering technology.
At present, still be most widely used with mechanical expression formula dewatering process.The water separation capability of slave unit, the equal energy of mechanical expression kind equipment output water ratio is the mud cake shape mud about 80 ﹪, mechanical expression class dehydration equipment is difficult to handle capillary in conjunction with water, surface adsorption water and internal water, can have the upper limit when causing carrying out sludge dewatering with the mechanical expression method; Heat drying kind equipment water separation capability is very big, but energy consumption is also high, so do not adopt easily.
In order to alleviate the quantities of mud subsequent disposal, National Environmental portion clearly stipulated in 2008, entered the mud of landfill yard, and its water ratio must not be greater than 60 ﹪.Yet, with regard to the present situation of present all kinds of sludge dewatering equipments, far apart with the relevant regulations of country.
Summary of the invention
There is the upper limit in dehydration at existing mechanical squeezing class dehydration equipment, do not reach the problem of national regulation, the object of the present invention is to provide a kind of folded spiral shell formula sludge dewatering equipment with electroosmotic dewatering function, it absorbs kneading electroosmotic dewatering technology with mechanical expression class dehydration equipment, increase and remove capillary in conjunction with the function of water, surface adsorption water and internal water, thereby improve the water separation capability of equipment by a relatively large margin.
The technical solution adopted for the present invention to solve the technical problems is that it comprises: a cylinder, comprise by some mutually stacked and be set in the rotating ring group that rotating ring on the screw rod and rotating ring cushion block are formed, and also be provided with in the gap of adjacent rotating ring and decide ring and composition is decided the ring group; One is located in the described cylinder and the Reducing screw axle coaxial with it, and described Reducing screw axle is provided with screw-blade, described rotating ring and fixed inboard and the described screw-blade running fit of encircling; Described cylinder is connected with the negative pole of direct supply, and described Reducing screw axle is connected with the positive pole of described direct supply.
Further, it also comprises a power set that is connected with described Reducing screw axle, is connected by tyre coupling between the output shaft of described power set and the described Reducing screw axle.
The bearing support at described Reducing screw axle two ends is provided with insulating sleeve.
Further, described Reducing screw axle is provided with offset assembly, the eccentric strap of described offset assembly is fixed on the described Reducing screw axle by flat key, eccentric strap is with bearing outward, described bearing is connected with described rotating ring group bolt by the offset assembly support, and the junction of described offset assembly support and described screw rod is provided with insulation thimble.
The junction of described rotating ring and described screw rod is provided with insulation thimble.
The material of described insulation thimble is glass fiber insulating sleeve, PVC sleeve pipe or heat-shrinkable T bush.
Effect of the present invention is:
One, folded spiral shell formula sludge dewatering equipment of the present invention is simple in structure, and is compatible convenient with traditional mechanical expression class dehydration equipment.On the basis that keeps the folded original dewatering efficiency of spiral shell formula sludge dewatering equipment, absorb kneading electroosmotic dewatering technology, remedy mechanical expression class dehydration equipment and be difficult to handle capillary in conjunction with the deficiency of water, surface adsorption water and internal water, original mud cake water content 80% can be reduced between 70～60%.
Two, folded spiral shell formula sludge dewatering equipment of the present invention tyre coupling by insulation between Reducing screw axle and power set connects, the Reducing screw axle and moving, decide to arrange between the ring assemblies insulation thimble, reach mutually insulated between Reducing screw axle and the cylinder, mix osmosis technology for folded spiral shell formula sludge dewatering equipment absorption convenience is provided.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples;
Fig. 1 is the synoptic diagram of the various compositions of water-containing sludge;
Fig. 2 is used for the synoptic diagram of infrastructure project for electroosmotic dewatering;
Fig. 3 is that the electroosmotic dewatering process application is in the synoptic diagram of folded spiral shell formula sludge dewatering equipment;
Fig. 4 is the structural representation of the folded spiral shell formula sludge dewatering equipment of the present invention;
Fig. 5 is the partial enlarged drawing at F position among Fig. 4;
The number in the figure explanation:
Pore water-A surface adsorption water-B internal water-C
Capillary is in conjunction with water-D mud granule-E
Soft clay ground-1 negative potential-2
Positive electrode-3 drainage water shoot-4
Cylinder-100 mud inlet-101
Mud mouth-102 rotating ring-103
Rotating ring cushion block-104 screw rod-105
Fixed ring-106 moves decides ring assemblies base-107
Offset assembly support-108 offset assembly-109
Insulation thimble one-110 insulation thimble two-111
Percolating fluid outlet orifice-112 Reducing screw axle-200
Screw-blade-201 bearing support-202
Insulating sleeve-203 power set output shaft-204
Tyre coupling-205 direct supply-300
Embodiment
Below in conjunction with Fig. 1 to Fig. 5 the folded spiral shell formula sludge dewatering equipment with electroosmotic dewatering function of the present invention is described, sees also Fig. 1, the moisture that contains in the mud can be divided into pore water A, surface adsorption water B, internal water C and capillary in conjunction with water D by its existence form.Wherein, pore water A refers to be accounted for more than 70 ﹪ of total water content by the moisture of large and small mud granule E encirclement, because it directly is not combined with the granular solids thing, and just can be more easily with its separation with the mechanical expression method; Its excess-three class water then often with the combination of granular solids thing, not easy-to-use mechanical expression method is separated.In addition, contain a large amount of microbial cells and organic colloidal matter in the mud, particle diameter is less than 10-4m.Because particle is small, cause that sewage sludge viscosity is big, the space is little, hydraulic permeability coefficient is low, more not easy-to-use mechanical expression method is separated.This also is appreciated that when why carrying out sludge dewatering with the mechanical expression method can exist the upper limit.As adopt the means that increase mechanical force to improve the dehydration energy, and DeGrain first, second the cost of equipment and power consumption will increase exponentially.
The desire searching is a kind of to break through the mechanical expression method upper limit, the water ratio of mud is made the further innovative dewatering technology of mud of reduction, need have following characteristics: (1) has distinct technical characterstic, specialize in the reluctant capillary of mechanical expression class dehydration equipment in conjunction with water, surface adsorption water and internal water, to remedy the deficiency of mechanical expression class dehydration equipment; (2) equipment investment cost is not high; (3) the running cost cost performance is reasonable; (4) compatible convenient with traditional mechanical expression class dehydration equipment.
Electroosmotic dewatering technology is had it long ago, its specific practice is to bury the electrode that is equally spaced in media such as soft clay, mud underground, load volts DS at electrode, control suitable strength of electric field well, and this zone in piling prepressing, after after a while, just can play the discharging consolidation effect.
The working mechanism of electroosmotic dewatering is: the gegenion in the particle surface diffusion double layer moves under the effect of electrical forces, and the drive water molecules is shifted to negative electrode generation penetrating fluid by anode.As direct pressure in addition, just that this penetrating fluid produces is mobile, discharge from negative electrode.The osmosis phenomenon occurs between particle in the capillary porosity duct, so can remove capillary in conjunction with water and surface adsorption water.
See also Fig. 2 (figure hollow core arrow is represented the set pressure direction, and filled arrows is represented the penetrating fluid direction that flows), be illustrated as the application of electroosmotic dewatering technology in major infrastructure project, be used for soft clay ground, silt seam are dewatered and reinforce.Negative potential 2 and positive electrode 3 are equally spaced and are embedded in the soft clay ground 1, and under the effect of electrical forces, to negative potential 2 migrations, penetrating fluid produces and flows water molecules under the effect of set pressure by positive electrode 3, and is discharged by drainage water shoot 4.
The characteristics of electroosmotic dewatering technology: (1) will apply lasting electrical forces to mud, will bury positive and negative electrode in mud underground, and connects direct supply; (2) when applying electrical forces, apply directed squeeze.Mix electroosmotic dewatering technology for mechanical expression method device for dehydrating sladge waste is absorbed, be analyzed as follows:
Be example with the plate-and-frame filter press, its workflow: (1) is with the mud sheet frame pressure chamber of packing into; (2) with external force sheet frame is applied squeeze, the moisture that contains in the mud is extruded out; (3) remove the pressure that adds, loosen sheet frame, take out the mud that becomes mud cake.The mud of packing into again begins new circulation.The pressure that this workflow is subjected to mud is interrupted and non-persistent, and the time of each pressurized is very short.Obviously, in plate-and-frame filter press work, no matter and can in mud, bury electrode underground, be exactly the time of mud pressurized is short too.This shows, the confidential electroosmotic dewatering technology of mixing of filter press, it is impracticable applying electrical forces synchronously.
Be example with folded spiral shell formula pressure filter, its technical process is flowing water type, the pressurized → self-emptying of automatic feed → continuously.Mud was also advanced in the extruded while, and was pushed into the mud mouth discharge.This point meets the requirement of electroosmotic dewatering technology very much.If the mud ingress at folded spiral shell formula pressure filter just begins to arrange positive and negative electrode, make mud place oneself in the midst of under the electric field once entering pressure filter, mud is in whole extruding, dehydration, progradation, the dual function of the power that all is squeezed and electrical forces just can obviously be improved the dewatering efficiency of folding spiral shell formula pressure filter.Certainly, in the equipment of a metal construction, set up enough big positive and negative electrodes of one group of coverage rate, and have reliable insulation between the electrode, can not produce short circuit phenomenon.This is also by no means easy.
The applicant is through a large amount of tests and research repeatedly, technical scheme with folded spiral shell formula sludge dewatering equipment of electroosmotic dewatering function of the present invention is proposed, now in conjunction with Fig. 3 to Fig. 5 folded spiral shell formula sludge dewatering equipment of the present invention is described, it comprises cylinder 100 and is located in the cylinder 100 and the Reducing screw axle 200 coaxial with it.Wherein, cylinder 100 is by the rotating ring group and decide the ring group and form, and is some mutual stacked and be set in rotating ring 103 and rotating ring cushion blocks 104 composition rotating ring groups on the screw rod 105; Be provided with in the gap between per two adjacent rotating rings 103 and decide ring 106 and form and decide the ring group, decide the ring group and decide on the ring assemblies base 107 by being bolted to move.Rotating ring 103 and encircle 106 surely and be crisscross arranged.Reducing screw axle 200 is provided with screw-blade 201, rotating ring 103 and inboard and screw-blade 201 running fit of encircling 106 surely; The two ends of cylinder 100 are respectively mud inlet 101 and mud mouth 102.Cylinder 100 is connected with the negative pole of direct supply 300, and Reducing screw axle 200 is connected with the positive pole of direct supply 300.Mutually insulated between Reducing screw axle 200 and the cylinder 100.
Application number is 201210056063.X, application publication number is the application for a patent for invention of CN102603146A, name is called the annexation of having put down in writing in the technical scheme of not having the folded spiral shell formula sludge dewatering equipment of wearing and tearing between Reducing screw axle 200 and the cylinder 100, Reducing screw axle 200 is provided with offset assembly 109, the eccentric strap of offset assembly 109 is fixed on the Reducing screw axle 200 by flat key, eccentric strap is with bearing outward, and bearing connects with rotating ring group bolt by bearing support.
When mud is entered by mud inlet 101, namely entered the DC electric field that is constituted by cylinder 100 and Reducing screw axle 200, under the effect of electrical forces, the gegenion in the mud granule surface diffusion electrostatic double layer produces migration, forms penetrating fluid.When 200 rotations of Reducing screw axle, promotion mud advances, and under the dual function of Reducing screw axle 200 and varying pitch blade 201, the volume of mud constantly is squeezed, expressed water is discharged by the percolating fluid outlet orifice 112 of cylinder 100 bottoms, has comprised pore water and penetrating fluid in the expressed water.
Produce the condition of electrical forces in the folded spiral shell formula sludge dewatering equipment: (1) must set up positive pole and negative pole; (2) to make positive pole and negative pole have enough big coupling area, namely enough big space must be arranged; (3) to make electrical forces have enough big field intensity, must make mutually insulated between the positive and negative electrode.Wherein, cylinder 100 forms excellent contact with after Reducing screw axle 200 is connected the negative pole and positive pole of direct supply 300 respectively by bolt, and above-mentioned condition (1) and (2) are satisfied in the coupling of formation maximum area between cylinder 100 and the Reducing screw axle 200.For condition (3), for making mutually insulated between the positive and negative electrode, have three positions need solve Insulation Problems in the water extracter:
1, Reducing screw axle frame, terms of settlement are all to set up insulating sleeve 203 on the bearing support 202 at Reducing screw axle 200 two ends, and insulating sleeve 203 can be made by insulating material such as nylon (tynex), tetrafluoroethylene or plastics.
2, the junction of Reducing screw axle and power set, terms of settlement is to adopt tyre coupling 205 to be connected between power set output shaft 204 and Reducing screw axle 200, utilize the non-conductive performance of tyre coupling 205 elastomeric materials, avoided the metallic contact between the two.
3, Reducing screw eccentric shaft assembly and moving, as to decide ring assemblies junction, for solving Insulation Problems, offset assembly support 108 is provided with insulation thimble 1 with the junction of screw rod 105 in the technical solution of the present invention.Rotating ring 103 is provided with insulation thimble 2 111 with the junction of screw rod 105.The material of insulation thimble is glass fiber insulating sleeve, PVC sleeve pipe or heat-shrinkable T bush etc.This technical scheme has realized the Reducing screw axle and has moved, decided not contacting of ring assemblies, mixed osmosis technology for folded spiral shell formula sludge dewatering equipment absorption convenience is provided.
Those skilled in the art will recognize that; above-mentioned embodiment is exemplary; be in order to make those skilled in the art can better understand content of the present invention; should not be understood as limiting the scope of the invention; so long as anyly be equal to change or modify according to what disclosed spirit was done, all fall into protection domain of the present invention.
Claims (6)
1. have the folded spiral shell formula sludge dewatering equipment of electroosmotic dewatering function, it comprises:
One cylinder comprises by some mutually stacked and be set in the rotating ring group that rotating ring on the screw rod and rotating ring cushion block are formed, also is provided with in the gap of adjacent rotating ring to decide ring and composition is decided the ring group;
One is located in the described cylinder and the Reducing screw axle coaxial with it, and described Reducing screw axle is provided with screw-blade, described rotating ring and fixed inboard and the described screw-blade running fit of encircling;
It is characterized in that: described cylinder is connected with the negative pole of direct supply, and described Reducing screw axle is connected with the positive pole of described direct supply.
2. folded spiral shell formula sludge dewatering equipment according to claim 1, it is characterized in that: it also comprises a power set that is connected with described Reducing screw axle, is connected by tyre coupling between the output shaft of described power set and the described Reducing screw axle.
3. folded spiral shell formula sludge dewatering equipment according to claim 1, it is characterized in that: the bearing support at described Reducing screw axle two ends is provided with insulating sleeve.
4. according to the described folded spiral shell formula sludge dewatering equipment of the arbitrary claim of claim 1 to 3, it is characterized in that: described Reducing screw axle is provided with offset assembly, the eccentric strap of described offset assembly is fixed on the described Reducing screw axle by flat key, eccentric strap is with bearing outward, described bearing is connected with described rotating ring group bolt by the offset assembly support, and the junction of described offset assembly support and described screw rod is provided with insulation thimble.
5. according to the described folded spiral shell formula sludge dewatering equipment of the arbitrary claim of claim 1 to 3, it is characterized in that: the junction of described rotating ring and described screw rod is provided with insulation thimble.
6. folded spiral shell formula sludge dewatering equipment according to claim 4, it is characterized in that: the material of described insulation thimble is glass fiber insulating sleeve, PVC sleeve pipe or heat-shrinkable T bush.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101588995A CN103253844A (en) | 2013-05-02 | 2013-05-02 | Foldable screw type sludge dewatering machine with electroosmotic dewatering function |
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| CN2013101588995A CN103253844A (en) | 2013-05-02 | 2013-05-02 | Foldable screw type sludge dewatering machine with electroosmotic dewatering function |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896473A (en) * | 2014-03-28 | 2014-07-02 | 四川环能德美科技股份有限公司 | Deep electroosmotic dewatering device of sludge |
| CN105923968A (en) * | 2016-06-21 | 2016-09-07 | 饶宾期 | Sewage sludge dewatering device based on cooperation of oxidization, electroosmosis and mechanical filter pressing |
| CN105948301A (en) * | 2016-04-11 | 2016-09-21 | 饶宾期 | Integrated processing system and method for sewage sludge with high dryness |
| CN106746424A (en) * | 2016-12-28 | 2017-05-31 | 徐州工程学院 | A kind of device for dehydrating sladge waste and its method of work based on microbiological coagulation method |
| WO2017143943A1 (en) * | 2016-02-22 | 2017-08-31 | 上海同臣环保有限公司 | Novel laminated and spiral sludge dewatering machine |
| CN107298518A (en) * | 2017-06-02 | 2017-10-27 | 宁波北仑绿邑环保科技有限公司 | Sludge dewatering system |
| CN107304097A (en) * | 2017-06-02 | 2017-10-31 | 宁波北仑绿邑环保科技有限公司 | Sludge dehydration device |
| CN109320030A (en) * | 2018-08-31 | 2019-02-12 | 中国石油化工股份有限公司 | A kind of excess sludge small molecule reactor of petrochemical wastewater treatment process |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103896473A (en) * | 2014-03-28 | 2014-07-02 | 四川环能德美科技股份有限公司 | Deep electroosmotic dewatering device of sludge |
| WO2017143943A1 (en) * | 2016-02-22 | 2017-08-31 | 上海同臣环保有限公司 | Novel laminated and spiral sludge dewatering machine |
| US11034603B2 (en) | 2016-02-22 | 2021-06-15 | Shanghai Techase Environment Protection Co., Ltd. | Multi plate screw press sludge dewatering machine |
| CN105948301B (en) * | 2016-04-11 | 2019-03-26 | 中国计量大学 | High mass dryness fraction sewage sludge integrated sewage treatment system and method |
| CN105948301A (en) * | 2016-04-11 | 2016-09-21 | 饶宾期 | Integrated processing system and method for sewage sludge with high dryness |
| CN105923968A (en) * | 2016-06-21 | 2016-09-07 | 饶宾期 | Sewage sludge dewatering device based on cooperation of oxidization, electroosmosis and mechanical filter pressing |
| CN105923968B (en) * | 2016-06-21 | 2019-03-26 | 中国计量大学 | Sewage sludge dehydration device based on oxidation electro-osmosis mechanism filter-pressing collaboration |
| CN106746424A (en) * | 2016-12-28 | 2017-05-31 | 徐州工程学院 | A kind of device for dehydrating sladge waste and its method of work based on microbiological coagulation method |
| CN107304097A (en) * | 2017-06-02 | 2017-10-31 | 宁波北仑绿邑环保科技有限公司 | Sludge dehydration device |
| CN107304097B (en) * | 2017-06-02 | 2020-05-08 | 宁波北仑绿邑环保科技有限公司 | Sludge dewatering device |
| CN107298518B (en) * | 2017-06-02 | 2020-05-08 | 宁波北仑绿邑环保科技有限公司 | Sludge dewatering system |
| CN107298518A (en) * | 2017-06-02 | 2017-10-27 | 宁波北仑绿邑环保科技有限公司 | Sludge dewatering system |
| CN109320030A (en) * | 2018-08-31 | 2019-02-12 | 中国石油化工股份有限公司 | A kind of excess sludge small molecule reactor of petrochemical wastewater treatment process |
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Application publication date: 20130821 |