CN106746447B - Electric dehydration device based on silt transportation pipeline - Google Patents
Electric dehydration device based on silt transportation pipeline Download PDFInfo
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- CN106746447B CN106746447B CN201611086761.9A CN201611086761A CN106746447B CN 106746447 B CN106746447 B CN 106746447B CN 201611086761 A CN201611086761 A CN 201611086761A CN 106746447 B CN106746447 B CN 106746447B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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Abstract
The invention discloses an electric dehydration device based on a sludge transportation pipeline, which comprises a cathode electrode, a water collection part and an anode electrode which are connected in sequence, wherein a first electrode net is arranged between the cathode electrode and one side of the water collection part, a second electrode net is arranged between the other side of the water collection part and the anode electrode, a water collection chamber is arranged inside the water collection part, one end of the water collection chamber connected with the anode electrode is sealed, and filter cloth positioned between the water collection chamber and the first electrode net is arranged at the other end of the water collection chamber. The electric dehydration device based on the sludge transportation pipeline realizes electric dehydration of sludge flowing in the pipeline, reduces the dependence on the field in the dehydration process and saves the dehydration time; the dewatering efficiency is high, and compared with the traditional dewatering process, the removal of the combined water in the sludge is enhanced. The device has simple structure, all main parts of the device can be detached and replaced, and the device has better compatibility with the existing equipment and is beneficial to practical production and application.
Description
Technical Field
The invention relates to a sludge dewatering device, in particular to an electric dewatering device based on dynamic sludge flowing in a sludge conveying pipeline.
Background
Silt refers to unconsolidated, weak or very fine grained soil that has been deposited in a still or slowly flowing aqueous environment, formed by physicochemical and biochemical actions. The sludge treatment method in the industry mainly adopts a sludge piling field mode, generally, natural air drying is adopted, but the method has the advantages of large floor area, long dehydration time, easy generation of secondary pollution and unsatisfactory dehydration effect.
The solid material is charged with positive electricity or negative electricity on the surface on the interface contacting with the polar water due to ionization or ion adsorption. The charged particles form an electric double layer with the counter ions in the liquid. Under the action of the electric field, counter ions in the diffusion layer carry water to move towards the electrode, and an electroosmosis phenomenon is formed. The electroosmosis phenomenon is utilized to realize the separation of solid-liquid mixture, particularly for colloid materials, the mechanical dehydration method has poor effect, and the electroosmosis dehydration technology has better dehydration effect.
The current electric dehydration technology is generally to use a vertical electric field to perform electric dehydration on the sludge, and apply pressure above an anode plate to form a pressurized electric dehydration process. But the study of the electrical dewatering of sludge in flow in pipelines is essentially open. Through carrying out the electrical dehydration to the silt of flow in-process, can reduce the step and the time of silt dehydration, reduce unnecessary place spending, realize dealing with the optimization of benefit purpose.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention provides an electric dehydration device based on a sludge transportation pipeline, which realizes the electric dehydration of sludge flowing in the pipeline, reduces the dependence on the field in the dehydration process and saves the dehydration time.
The technical scheme is as follows: in order to achieve the purpose, the electric dehydration device based on the sludge transportation pipeline comprises a cathode electrode, a water collection part and an anode electrode which are sequentially connected, wherein a first electrode net is arranged between the cathode electrode and one side of the water collection part, a second electrode net is arranged between the other side of the water collection part and the anode electrode, a water collection chamber is arranged inside the water collection part, one end of the water collection chamber connected with the anode electrode is sealed, and filter cloth positioned between the water collection chamber and the first electrode net is arranged at the other end of the water collection chamber.
Furthermore, a porous support plate is arranged between the filter cloth and the water collecting room, and the filter cloth is fixed on the porous support plate. The porous support plate is provided to increase the mechanical strength of the filter cloth.
The filter cloth and the porous support plate are both circular rings, and the included angle between the filter cloth and the central axis of the pipeline is 10-90 degrees. Thereby can change its and the pipeline central axis contained angle between through changing different filter cloth and poriform backup pad in order to reduce the lift of silt pump and realize reducing the purpose of this device local head loss. The device is sequentially installed at the joint of each other pipeline section according to the method, and the distance of each pipeline section is comprehensively determined according to the actual electric dehydration efficiency and the dehydration rate.
The filter cloth is made of yarn or synthetic mesoporous material, the porous support plate is made of hard material, the filter cloth and the porous support plate can be detached and have certain mechanical strength.
Furthermore, the first electrode net and the second electrode net are respectively sleeved with a first sealing gasket and a second sealing gasket. The purpose of the sealing coil is to insulate and waterproof material in order to fix the electrode mesh and to prevent water from seeping out of the flange connection during pumping.
The first sealing washer and the second sealing washer are provided with preformed holes so that the first electric wire and the second electric wire can be connected with the first electrode net and the second electrode net respectively. The wire is connected with the negative electrode and the positive electrode of an external power supply which provides 10-100V voltage.
The first electrode net and the second electrode net are made of stainless steel, synthetic metal, graphite or other conductive materials.
A water outlet is arranged at the bottom of the water collecting part; the water outlet is provided with a connector required for connecting with a vacuum pump; the dehydration rate is improved by connecting a vacuum pump and utilizing the negative pressure pumping action of the pump.
The cathode electrode is provided with a first flange plate, two ends of the water collecting component are respectively provided with a second flange plate and a third flange plate, and the anode electrode is provided with a fourth flange plate; the cathode electrode is connected with the water collecting part through a first flange and a second flange, and the water collecting part is connected with the anode electrode through a third flange and a fourth flange.
Furthermore, a first insulating layer and a second insulating layer are respectively arranged inside the first flange plate and the fourth flange plate, and the insulating layers are used for preventing current on the electrodes from being transmitted to the mud conveying pipeline.
The working principle is as follows: the electric dehydration device based on the sludge transport pipeline is connected to the joint of the two ends of each section of pipeline along the conveying direction of the sludge transport pipeline. When pumping mud, pumping out the water-containing mud by using a mud pump and conveying the water-containing mud into a pipeline, wherein the combined water and free water in the mud are separated under the action of positive and negative electrodes at two ends of each section of pipeline and sequentially enter a water collection chamber through a first electrode mesh in a cathode electrode and filter cloth and a porous support plate in a water collection part along the directions of mud flow and electric field action, and are finally discharged from a water outlet at the bottom of the water collection part under the action of gravity. The transported sludge flows into the next section of pipeline through a channel between the first electrode net and the second electrode net which are connected with negative and positive electricity and the water collecting part under the pressure of the sludge pump; the aqueous sludge is continuously subjected to an electrical dewatering process in each section of the pipeline, eventually reaching the desired dewatering goal and being discharged from the pipeline.
Has the advantages that: compared with the prior art, the invention has the following advantages: 1. the invention realizes the electric dehydration of the sludge flowing in the pipeline, reduces the dependence on the field in the dehydration process and saves the dehydration time. 2. The invention has high dehydration efficiency, and compared with the traditional dehydration process, the invention enhances the removal of the bound water in the sludge. 3. The invention has simple structure, the main parts of the invention can be disassembled and replaced, and the invention has better compatibility with the existing equipment, and is beneficial to practical production and application.
Drawings
FIG. 1 is a schematic structural diagram of an electric dehydration device based on a sludge transportation pipeline;
FIG. 2 is a schematic diagram of a cathode electrode structure in the electric dehydration device based on the sludge transportation pipeline;
FIG. 3 is a schematic structural view of a water collecting part in the electric dehydration device based on a sludge transportation pipeline;
FIG. 4 is a schematic diagram of the structure of an anode electrode in the electric dehydration device based on the sludge transportation pipeline;
fig. 5 is a schematic diagram of an included angle between a filter cloth and a porous support plate in the electric dehydration device based on the sludge transportation pipeline and the central axis of the pipeline.
Detailed Description
The invention is further illustrated by the following figures and examples.
Examples
As shown in fig. 1 to 4, before pumping, an electric dehydration device based on a sludge transport pipeline is installed at the joint of two ends of each section of pipeline along the conveying direction of the sludge transport pipeline, and the pipeline, the electric dehydration device based on the sludge transport pipeline, the electric dehydration device based on the sludge transport pipeline and the pipeline are connected in a circulating manner in sequence, wherein a positive electrode is arranged at the sludge inlet part of the first section of pipeline, and a negative electrode is arranged at the tail end of the last section of pipeline. The electric dehydration device based on the sludge transportation pipeline comprises a cathode electrode 1, a water collecting component 2 and an anode electrode 3 which are connected in sequence; a first flange 14 is arranged on the cathode electrode 1, a second flange 15 and a third flange 16 are respectively arranged at two ends of the water collecting part 2, and a fourth flange 17 is arranged on the anode electrode 3; the cathode electrode 1 is connected with the water collecting component 2 through a first flange 14 and a second flange 15, and the water collecting component 2 is connected with the anode electrode 3 through a third flange 16 and a fourth flange 17; the first flange 14 and the fourth flange 17 are internally provided with a first insulating layer 18 and a second insulating layer 19, respectively.
A first electrode net 4 is arranged between the cathode electrode 1 and one side of the water collecting component 2, and a second electrode net 5 is arranged between the other side of the water collecting component 2 and the anode electrode 3. The first electrode mesh 4 and the second electrode mesh 5 are made of stainless steel, synthetic metal, graphite or other conductive materials, a first sealing washer 9 and a second sealing washer 10 are respectively sleeved on the first electrode mesh 4 and the second electrode mesh 5, and the sealing washers are made of insulating waterproof materials and used for fixing the electrode meshes and preventing water from seeping out from the connection positions of the flanges in the pumping process; the first sealing washer 9 and the second sealing washer 10 are provided with reserved holes, so that the first wire 11 and the second wire 12 are respectively connected with the first electrode net 4 and the second electrode net 5, and the first wire 11 and the second wire 12 are connected with the negative electrode and the positive electrode of an external power supply for providing 10-100V voltage.
A water collecting room 6 is arranged in the water collecting part 2, one end of the water collecting room 6 connected with the anode electrode 3 is sealed, and filter cloth 7 positioned between the water collecting room 6 and the first electrode net 4 is arranged at the other end of the water collecting room 6; between 6 between filter cloth 7 and catchment can also be provided with poroid backup pad 8, filter cloth 7 is fixed in poroid backup pad 8, it is firm with it through the connection of first flange 14 and second flange 15, the material filter cloth 7 that the material is yarn or synthetic mesoporous material and the poroid backup pad 8 that the material is hard material all have certain mechanical strength and can dismantle, if the mechanical strength of filter cloth 7 itself can satisfy the dehydration needs, then can dismantle poroid backup pad 8 and get off and let filter cloth 7 snap-on in the one end of catchment room 6.
As shown in fig. 5, the filter cloth 7 and the porous support plate 8 are both circular ring-shaped components, and the included angle between the filter cloth 7 and the central axis of the pipeline is 10-90 degrees, the upper diagram in fig. 5 shows that the filter cloth 7 and the porous support plate 8 are perpendicular to the central axis of the pipeline, the lower diagram shows that the filter cloth 7 and the porous support plate 8 form a certain included angle with the central axis of the pipeline, the included angle is 10-90 degrees, the included angle between the filter cloth 7 and the central axis of the pipeline can be changed by replacing different filter cloth 7 and porous support plates 8 in order to reduce the lift of the sludge pump, so that the local head loss of the device can be reduced, the device on the connection part of each other pipeline is sequentially installed according to the method, and the. After the connection of each section of the device is finished, an external power supply is connected to the first electrode net 4 and the second electrode net 5 through the first electric wire 11 and the second electric wire 12, and the external power supply is checked before mud pumping, so that the positive electrode and the negative electrode of the external power supply are respectively connected to the anode electrode 3 and the cathode electrode 1 of the device.
When pumping mud, pumping out water-containing mud by using a mud pump and conveying the water-containing mud into a pipeline, enabling combined water and free water in the mud to be acted by positive and negative electrodes at two ends of each section of pipeline, separating out the combined water and the free water to sequentially enter a water collecting chamber 6 through a first electrode net 4 in a cathode electrode 1, a filter cloth 7 and a porous supporting plate 8 in a water collecting part 2 along the flowing direction of the mud and the action direction of an electric field, and finally discharging the combined water and the free water through a water outlet 13 at the bottom of the water collecting part 2 under the action of gravity, connecting a vacuum pump at the water outlet 13 in order to improve the dehydration efficiency, and improving the dehydration rate through the negative pressure pumping. Wherein the transported sludge flows into the next section of pipeline through the first electrode net 4 and the second electrode net 5 connected with negative and positive electricity and the channel between the water collecting parts 2 under the pressure of the sludge pump. The aqueous sludge is continuously subjected to an electrical dewatering process in each section of the pipeline, eventually reaching the desired dewatering goal and being discharged from the pipeline. After the equipment runs for a period of time, the electric dehydration device based on the sludge transportation pipeline at the joint of each pipeline is checked, and the electrode net and the filter cloth are replaced in time so as to avoid influencing the dehydration effect.
Claims (7)
1. The electric dehydration device based on the sludge transportation pipeline is characterized by comprising a cathode electrode (1), a water collection component (2) and an anode electrode (3) which are sequentially connected, wherein a first electrode net (4) is arranged between the cathode electrode (1) and one side of the water collection component (2), a second electrode net (5) is arranged between the other side of the water collection component (2) and the anode electrode (3), a water collection room (6) is arranged around the inside of the water collection component (2), one end of the water collection room (6) connected with the anode electrode (3) is sealed, and the other end of the water collection room (6) is a filter cloth (7) positioned between the water collection room (6) and the first electrode net (4); a porous support plate (8) is arranged between the filter cloth (7) and the water collecting room (6), and the filter cloth (7) is fixed on the porous support plate (8); the filter cloth (7) and the porous support plate (8) are both annular, and the included angle between the filter cloth and the central axis of the pipeline is 10-90 degrees; the filter cloth (7) is made of yarn or synthetic mesoporous material, the porous support plate (8) is made of hard material, and the filter cloth and the porous support plate can be detached; the electric dehydration device based on the sludge conveying pipeline is arranged at the joint of two ends of each section of pipeline along the conveying direction of the sludge conveying pipeline, and is sequentially connected with the pipeline, the electric dehydration device based on the sludge conveying pipeline, the electric dehydration device based on the sludge conveying pipeline and the pipeline in a circulating manner, a positive electrode is arranged at the position where the sludge enters the first section of pipeline, and a negative electrode is arranged at the tail of the last section of pipeline.
2. The electric dewatering device based on a sludge transporting pipeline according to claim 1, characterized in that the first electrode mesh (4) and the second electrode mesh (5) are respectively sleeved with a first sealing gasket (9) and a second sealing gasket (10).
3. The sludge transport pipeline-based electric dehydration apparatus of claim 2, characterized in that the first and second sealing gaskets (9, 10) are provided with preformed holes to facilitate the connection of the first and second electric wires (11, 12) with the first and second electrode nets (4, 5), respectively.
4. The sludge transport pipeline based electric dewatering apparatus of claim 1, characterized in that the first electrode mesh (4) and the second electrode mesh (5) are stainless steel, synthetic metal or graphite.
5. The electrical dewatering apparatus based on a sludge transport pipeline according to claim 1, characterized in that the bottom of the water collection part (2) is provided with a drainage opening (13).
6. The sludge transport pipeline-based electric dehydration device of claim 1, wherein the cathode electrode (1) is provided with a first flange (14), the two ends of the water collection part (2) are respectively provided with a second flange (15) and a third flange (16), and the anode electrode (3) is provided with a fourth flange (17); the cathode electrode (1) is connected with the water collecting component (2) through a first flange (14) and a second flange (15), and the water collecting component (2) is connected with the anode electrode (3) through a third flange (16) and a fourth flange (17).
7. A sludge transport pipeline based electric dewatering apparatus according to claim 6, characterized in that the first flange (14) and the fourth flange (17) are provided with a first insulating layer (18) and a second insulating layer (19) inside, respectively.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086761.9A CN106746447B (en) | 2016-12-01 | 2016-12-01 | Electric dehydration device based on silt transportation pipeline |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611086761.9A CN106746447B (en) | 2016-12-01 | 2016-12-01 | Electric dehydration device based on silt transportation pipeline |
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| CN106746447A CN106746447A (en) | 2017-05-31 |
| CN106746447B true CN106746447B (en) | 2020-12-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859103A (en) * | 2016-06-21 | 2016-08-17 | 饶宾期 | Sewage sludge dehydrating device based on electroosmosis and mechanical pressure filtration coupling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105859103A (en) * | 2016-06-21 | 2016-08-17 | 饶宾期 | Sewage sludge dehydrating device based on electroosmosis and mechanical pressure filtration coupling |
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