CN107382023B - Energy-saving electroosmosis sludge high-dryness dewatering system - Google Patents
Energy-saving electroosmosis sludge high-dryness dewatering system Download PDFInfo
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- CN107382023B CN107382023B CN201710848625.7A CN201710848625A CN107382023B CN 107382023 B CN107382023 B CN 107382023B CN 201710848625 A CN201710848625 A CN 201710848625A CN 107382023 B CN107382023 B CN 107382023B
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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
- C02F11/006—Electrochemical treatment, e.g. electro-oxidation or electro-osmosis
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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
Abstract
The invention relates to an energy-saving electroosmosis sludge high-dryness dewatering system, which comprises: the electroosmosis filter pressing units are internally provided with filter pressing cavities, after feed dehydration is realized in the filter pressing cavities, electroosmosis and filter pressing dehydration are carried out, and the mud cutting mechanism starts to carry out mud cutting action at intervals along with the reduction of the water content of the mud on the anode plate side of the electroosmosis filter pressing units; the mud cutting mechanisms correspond to the electroosmosis filter pressing units one by one, mud cutting gaps are formed in the anode plate sides of the corresponding electroosmosis filter pressing units, and the mud cutting mechanisms cut off the sludge layers on the anode plate sides of the electroosmosis filter pressing units through the mud cutting gaps at intervals; and the rack is used for installing the plurality of electro-osmosis treatment units and the mud cutting mechanism. According to the invention, through electrifying the sludge to be treated, the sludge with negative charges is attracted to the anode, and the anode dry sludge layer is cut off in time, so that the resistance of the anode sludge is reduced, the current is increased, and the influence on electroosmosis dehydration is reduced.
Description
Technical Field
The invention relates to the technical field of sludge treatment, in particular to an energy-saving electroosmosis sludge high-dryness dewatering system.
Background
The high water content of the sludge is a bottleneck restricting the treatment of the sludge, the sludge with high water content is not only large in volume, but also contains a large amount of organic matters, heavy metals and harmful microorganisms which are easy to be decomposed or released into the environment to cause secondary pollution, and the subsequent landfill, incineration, resource utilization and the like of the sludge are adversely affected. Therefore, the deep dehydration and reduction of the sludge are the primary purposes of sludge treatment, the reduction is the basis for realizing other 'three-transformation' of the sludge, and the drier the sludge is, the more beneficial the subsequent treatment and disposal are.
The sludge contains 4 forms of water, namely free water, adsorbed water, capillary water and internal water. Although the absorbed water, capillary water and internal water only account for a small part of the sludge moisture, the total content of the absorbed water, the capillary water and the internal water is far higher than the mass of the dry sludge, and the absorbed water, the capillary water and the internal water are difficult to remove by adopting a conventional method, so that the moisture content of the sludge is difficult to further reduce. The special floc structure of the sludge is a main factor influencing deep dehydration of the sludge, is mainly formed by wrapping and adsorbing suspended particles in water by high-hydration Extracellular Polymer (EPS), and has a special double-electric-layer structure, so that the sludge settling property and the dehydration property are poor. In order to realize deep dehydration of the sludge, the special floc structure of the sludge must be firstly destroyed, bound water is released, and the surface hydrophilicity of the sludge is weakened.
The electroosmosis dehydration technology utilizes a special double electric layer structure of sludge to realize dehydration. The sludge particles are negatively charged, and the water molecules are positively charged, so that the negatively charged sludge particles move towards the anode plate and the positively charged water molecules move towards the cathode plate under the action of the electric field force. As a novel, green and efficient solid-liquid separation technology, the electroosmosis dehydration technology has the advantages of good dehydration performance, high flexibility, no pollution, strong controllability and the like, and has attracted extensive attention in recent years, and more researchers apply the electroosmosis dehydration technology to sludge dehydration so as to achieve the purpose of deep dehydration of sludge.
Compared with the existing sludge deep dehydration technology (heat drying, chemical conditioning and high pressure squeezing method, etc.), the electroosmosis dehydration technology has a series of unique advantages, which are shown as follows: the method has good dehydration effect, in the electroosmosis dehydration process, under the action of electrochemical reaction, sludge cells are electrically stimulated, electrolyzed water is directionally and powerfully moved to generate Brownian motion, the temperature in the cells is increased, the pressure is increased, cell membranes are broken, part of membrane water flows out, the electroosmosis dehydration can remove part of water which cannot be removed by the traditional mechanical dehydration, and the water content of the sludge can be reduced to below 60 percent through electroosmosis dehydration; compared with heat drying, the sludge drying device has certain energy-saving advantage, and reduces the cost of sludge advanced treatment drying; only the sludge is subjected to reduction dehydration, the properties and components of the sludge are not changed, new substances are not added, and any subsequent sludge disposal mode is not affected; the treatment process is clean and has no secondary pollution.
The main structural forms of the existing electroosmosis sludge dewatering machine are an electroosmosis belt type sludge dewatering machine, an electroosmosis plate frame type sludge dewatering machine and an electroosmosis stacked spiral type sludge dewatering machine. The electroosmosis sludge dewatering machine with the three structures needs great extrusion force in order to discharge the water gathered near the cathode, so that the equipment is large in size, complex in structure, high in energy consumption and low in efficiency. And in order to effectively extrude the moisture in the sludge, the distance between the anode and the cathode is close, and once a good conductor appears in the sludge, the filter belt is easy to break down, so that frequent maintenance is needed, and the filter belt is replaced.
If directly get into the electroosmosis with the very high mud of moisture content, need the desorption a large amount of moisture, will increase substantially the energy consumption of electroosmosis, must before the electroosmosis dehydration, adopt the method of mechanical dehydration to carry out preliminary dehydration to mud for get into the electroosmosis dehydration again after the mud moisture content reaches certain degree, reach best energy-conserving effect.
However, as an emerging sludge dewatering technology, the electroosmosis dewatering technology has the following main problems: 1. the final water content of the dewatered sludge is still 50-60%, 50% is difficult to break through, and the electroosmosis high-dryness sludge dewatering technology is difficult to form; 2. in the electroosmosis process, the moisture content of sludge near an anode is rapidly reduced, the generation of electrochemical reaction gas and cracks in sludge cakes are generated, the contact area between the sludge cakes and an electrode plate is reduced, the sludge resistance is increased, the current is reduced, and the dehydration effect is poor; 3. in the dehydration process, the electric energy is converted into heat energy by the electric field generated current, so that the temperature of the sludge is raised, and the problem of large energy consumption exists in practice; 4. the water content of the mud cakes in the thickness direction is not uniformly distributed, the water content of sludge at the anode layer is lower, and water molecules are accumulated at the cathode layer to cause the water content of sludge near the cathode layer to be higher.
Disclosure of Invention
In view of the above, the invention provides an energy-saving electroosmosis sludge high-dryness dehydration system, which can cut an anode sludge layer and adjust the voltage at two ends of a polar plate in real time according to the thickness of a mud cake, so as to improve dehydration efficiency and effect and reduce dehydration energy consumption, aiming at the technical problems of reduced current increase of an anode sludge layer resistor, difficulty in maintaining constant voltage gradient in an electroosmosis process, higher energy consumption and poorer dehydration effect in the prior art.
The technical scheme of the invention is to provide an energy-saving electroosmosis sludge high-dryness dehydration system with the following structure, which comprises:
the device comprises a plurality of electroosmosis filter-pressing units, wherein a filter-pressing cavity is arranged in each electroosmosis filter-pressing unit, electroosmosis and filter-pressing dehydration are carried out after feed dehydration is realized in the filter-pressing cavity, and a mud cutting mechanism starts to carry out mud cutting action at intervals along with reduction of the water content of sludge on the anode plate side of the electroosmosis filter-pressing units;
the mud cutting mechanisms correspond to the electroosmosis filter pressing units one by one, mud cutting gaps are formed in the anode plate sides of the corresponding electroosmosis filter pressing units, and the mud cutting mechanisms cut off the sludge layers on the anode plate sides of the electroosmosis filter pressing units through the mud cutting gaps at intervals;
and the rack is used for installing the plurality of electro-osmosis treatment units and the mud cutting mechanism.
Optionally, the electroosmosis filter pressing unit includes an anode plate assembly, a cathode plate assembly and a cylinder, the cylinder is mounted on a rack slide rail of the rack, the anode plate assembly and the cathode plate assembly are slidably disposed in the cylinder, and the filter pressing chamber is a space formed by a cylinder wall, the anode plate assembly and the cathode plate assembly; the barrel on be equipped with the mud slit that supplies mud cutting mechanism to carry out the mud cutting action, when needs mud cutting, make mud slit arrange the filter-pressing cavity in through removing the barrel to be close to anode plate subassembly, under the non-mud cutting state, then remove the barrel and make mud slit leave the filter-pressing cavity.
Optionally, the electroosmosis filter pressing unit further comprises a connecting plate, the connecting plate is also mounted on a rack slide rail of the rack, and the cathode plate assembly is fixedly connected with the connecting plate through a pole plate push column; the anode plate component is also connected with a polar plate push column, and the push rod is driven under the action of the power component to extrude the filter pressing cavity.
Optionally, the voltage between the anode plate assembly and the cathode plate assembly of the electro-osmotic pressure filtration unit is adjusted according to the thickness of the mud cake in the pressure filtration chamber, so that the voltage per unit distance of the mud cake is constant.
Optionally, the electroosmotic filter pressing unit further comprises an orthogonal sliding link mechanism, wherein at least one end of the orthogonal sliding link mechanism is connected to the cylinder, one end of the orthogonal sliding link mechanism is connected to the connecting plate, and the relative position of the cylinder and the filter pressing cavity is adjusted through the movement of the driving end of the orthogonal sliding link mechanism.
Optionally, cut mud mechanism and include push rod support, cut mud push rod and mud pushing rod, the one end of push rod support install on the barrel, cut mud push rod and mud pushing rod and slide on the push rod support in order to realize cutting mud and mud pushing, the equal slidable connection of mud pushing rod of a plurality of mud mechanisms of cutting is on the mud pushing rod slide rail of frame.
Optionally, the electroosmosis filter pressing unit further comprises a constant voltage gradient control system, the constant voltage gradient control system comprises a displacement sensor and a power supply voltage adjusting module, the displacement sensor detects the thickness of the mud cake and feeds the mud cake back to the power supply voltage adjusting module so as to adjust the voltage between the cathode plate assembly and the anode plate assembly, and constant voltage gradient electroosmosis dehydration is realized.
Optionally, a barrier strip for blocking the anode plate assembly is arranged on one side, close to the anode plate assembly, of the cylinder, the displacement sensor detects the distance from the anode plate assembly to the barrier strip and the distance from the cathode plate assembly to the barrier strip in real time, indirectly measures the real-time thickness of the mud cake, transmits a thickness signal to the controller, sends a signal to the power supply voltage adjusting module through the processing of the controller so as to change the reference voltage, and adjusts the voltages at two ends of the mud cake in real time so that the voltage gradient on the mud cake is constant.
Optionally, set up filtrating buffer tank and be used for collecting the moisture that the pressure was filtered out barrel circumference slope is equipped with a plurality of filter cloth and washs the spray pipe, the suction pump take out the water in filtrating buffer tank and wash the filter cloth through filter cloth washing spray pipe.
Optionally, barrel first half and latter half all have the groove of fixed width and this groove to run through the barrel to as the mud cutting gap, the push rod support be located the barrel and open directly over the groove, the mud cutting push rod include the draw runner of two steel wires in the bottom, both sides and the clamp plate at top, the sliding ring of clamp plate top is used for with mud cutting rod sliding rail connection, it passes to be hollow the strip that pushes away that is used for pushing away the mud push rod in the middle of the clamp plate, the mud pushing rod include the strip that pushes away of bottom, the draw runner of both sides and the layering at top, the mud cutting push rod is located all the time and pushes away mud push rod below.
By adopting the structure, the invention has the following advantages: when the energy-saving electroosmosis sludge high-dry dehydration system is used for electroosmosis dehydration, sludge to be treated is electrified, sludge with negative charges is attracted to the anode, the anode dry sludge layer is cut off in time, the resistance of the anode sludge is reduced, the current is increased, and the influence on electroosmosis dehydration is reduced. In the whole process, electroosmosis dehydration is carried out by adopting a constant voltage gradient mode so as to further reduce energy consumption and improve dehydration effect and efficiency.
Drawings
FIG. 1 is a front view of an energy-efficient electro-osmotic sludge high-dryness dewatering system according to the present invention;
FIG. 2 is a top view of the energy-efficient electro-osmotic sludge high-dryness dewatering system of the present invention;
FIG. 3 is a cross-sectional view of the energy-efficient electro-osmotic sludge high-dryness dewatering system of the present invention;
FIG. 4 is a front view of an electro-osmotic pressure filter unit;
FIG. 5 is a perspective view of an electro-osmotic pressure filtration unit;
FIG. 6 is a side cross-sectional view of an electro-osmotic pressure filter unit;
FIG. 7 is a schematic structural view of a filtrate buffer tank;
FIG. 8 is a schematic structural view of a cathode cover plate;
FIG. 9 is a schematic view of the construction of the cathode plate;
FIG. 10 is a schematic view of the energy-saving electroosmosis sludge high-dryness dewatering system of the invention during sludge feeding;
FIG. 11 is a schematic diagram of the energy-saving electroosmosis sludge high-dryness dewatering system during sludge cutting.
As shown in the figure: 1. the device comprises a mud pushing cylinder, 2, a mud cutting cylinder, 3, a cylinder body sliding cylinder, 4, a first plate, 5, a mud pushing rod sliding rail, 6, an extrusion cylinder, 7, a connecting rod mechanism sliding rail, 8, a mud pushing rod, 9, a mud cutting push rod, 10, a push rod support, 11, a connecting plate, 12, an orthogonal sliding connecting rod mechanism, 12-1, a vertical connecting rod, 12-2, a horizontal connecting rod, 12-3, a connecting rod base, 12-4, an inclined connecting rod, 12-5, a vertical sliding ring, 13, a mud cutting rod sliding rail, 14, a tail plate, 15, a support lug, 16, a control bus, 17, a power wire, 18, a cylinder body, 19, a sliding chute, 20, a pole pushing column, 21, a displacement sensor, 22, a filter cloth cleaning water spraying pipe, 23, an anode plate limiting cylinder, 24, a rack sliding rail, 25, a controller, 26, an anode plate assembly, 26-1, an anode cover, The device comprises an anode plate, 26-3 parts of a mud inlet pipe, 27 parts of a cathode plate assembly, 27-1 parts of a cathode cover plate, 27-2 parts of a cathode plate, 27-3 parts of a cathode pressure ring, 28 parts of a baffle strip, 29 parts of a filtrate buffer box, 30 parts of a water suction pump, 31 parts of a pneumatic ball valve, 32 parts of a filtrate buffer box water inlet, 33 parts of a filtrate buffer box water outlet.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The invention is intended to cover alternatives, modifications, equivalents, and alternatives that may be included within the spirit and scope of the invention. In the following description of the preferred embodiments of the present invention, specific details are set forth in order to provide a thorough understanding of the present invention, and it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. Moreover, the drawings of the present invention are not necessarily to scale, nor are they necessarily to scale, as may be shown and described herein.
The basic solution of the invention is an energy-saving electroosmosis sludge high-dryness dewatering system, comprising:
the device comprises a plurality of electroosmosis filter-pressing units, wherein a filter-pressing cavity is arranged in each electroosmosis filter-pressing unit, electroosmosis and filter-pressing dehydration are carried out after feed dehydration is realized in the filter-pressing cavity, and a mud cutting mechanism starts to carry out mud cutting action at intervals along with reduction of the water content of sludge on the anode plate side of the electroosmosis filter-pressing units;
the mud cutting mechanisms correspond to the electroosmosis filter pressing units one by one, mud cutting gaps are formed in the anode plate sides of the corresponding electroosmosis filter pressing units, and the mud cutting mechanisms cut off the sludge layers on the anode plate sides of the electroosmosis filter pressing units through the mud cutting gaps at intervals;
and the rack is used for installing the plurality of electro-osmosis treatment units and the mud cutting mechanism.
Specific technical details are further explained with reference to the attached drawings.
As shown in the figure, the schematic diagrams of different visual angles of the energy-saving electroosmosis sludge high-dryness dewatering system are shown. Each electroosmosis filter pressing unit comprises an anode plate assembly 26, a cathode plate assembly 27 and a cylinder 18, the cylinder 18 is mounted on a rack slide rail 2 of a rack, the anode plate assembly 26 and the cathode plate assembly 27 are slidably arranged in the cylinder 18, and the filter pressing chamber is a space formed by the cylinder wall, the anode plate assembly 26 and the cathode plate assembly 27; the cylinder 18 is provided with a mud cutting gap for the mud cutting mechanism to execute mud cutting action, when mud is required to be cut, the mud cutting gap is arranged in the filter-pressing cavity by moving the cylinder 18 and is close to the anode plate assembly 26, and the cylinder 18 is moved to enable the mud cutting gap to leave the filter-pressing cavity in a non-mud cutting state.
The electroosmosis filter pressing unit further comprises a connecting plate 11, the connecting plate 11 is also arranged on a rack slide rail 2 of the rack, and the cathode plate assembly 27 is fixedly connected with the connecting plate 11 through a pole plate push column 20; the anode plate assembly 26 is also connected with a pole plate push column 20, and the pole plate push column 20 is driven by the power piece to extrude the filter pressing chamber.
Cut mud mechanism and include push rod support 10, cut mud push rod 9 and push away mud push rod 8, the one end of push rod support 10 install on barrel 18, cut mud push rod 9 and push away mud push rod 8 and slide on push rod support 10 in order to realize cutting mud and pushing away mud, the equal slidable connection of the mud push rod 9 of cutting of a plurality of mud mechanisms is on the mud pole slide rail 13 of cutting of frame, the equal slidable connection of the mud push rod 8 of a plurality of mud mechanisms of cutting is on the mud pole slide rail 5 of pushing away of frame.
The power part mainly comprises a mud pushing cylinder 1, a mud cutting cylinder 2, a cylinder body sliding cylinder 3 and an extrusion cylinder 6, wherein the mud pushing cylinder 1 controls a mud pushing rod slide rail 5 to ascend and descend so as to drive a mud pushing push rod 8 to ascend and descend, and the mud cutting cylinder 2 controls a mud cutting rod slide rail 13 to ascend and descend so as to drive a mud pushing push rod 9 to ascend and descend. In addition, the anode plate assembly is limited by an anode plate limiting cylinder 23, the anode plate limiting cylinder 23 is arranged at the lower half part of the barrel 18, the front part and the rear part of the anode plate limiting cylinder 23 are respectively made according to the seam width, and a piston column of the anode plate limiting cylinder 23 extends out of the seam to clamp the anode plate assembly 26 in the mud feeding process. The mud cutting steel wire and the mud pushing strip descend to the upper side of the mud feeding pipe, so that the anode piston plate cannot slide to the left side of the mud cutting seam and can be limited in cooperation. The cylinder sliding oil cylinder 3 can adopt servo motion, which mainly controls the relative distance between the cylinder 18 and the connecting plate 11, and according to the distance measured by the displacement sensor 21 of the anode plate component 26, the cylinder sliding oil cylinder 3 is lifted for a certain distance, namely the connecting rod mechanism slide rail 7 and the vertical connecting rod 12-1 are lifted for a certain distance, the horizontal connecting rod 12-2 inclines the cylinder 18 to slide on the connecting plate 11, and the anode dry mud layer is exposed at a mud cutting gap.
The electro-osmotic filter pressing unit further comprises an orthogonal sliding connecting rod mechanism, at least one end of the orthogonal sliding connecting rod mechanism is connected to the cylinder body 18, one end of the orthogonal sliding connecting rod mechanism is connected to the connecting plate 11, and the relative position of the cylinder body 18 and the filter pressing cavity is adjusted through movement of the driving end of the orthogonal sliding connecting rod mechanism. The orthogonal sliding connecting rod mechanism 12 comprises a vertical connecting rod 12-1, a horizontal connecting rod 12-2, a connecting rod base 12-3, an inclined connecting rod 12-4 and a vertical sliding ring 12-5, wherein the connecting rod base 12-3 is fixedly arranged on the cylinder 18 and the support lug 15 of the middle connecting plate 11, the support lug 15 is connected with a rack slide rail 24 through a slide groove 19, a vertical slide ring 12-5 is sleeved on a vertical connecting rod 12-1, the vertical connecting rod 12-1 and a connecting rod mechanism slide rail 7 synchronously move up and down to drive a horizontal connecting rod 12-2 to rotate, further changing the distance between the cylinder 18 and the middle connecting plate 11 to push the mud cakes to mud cutting seams, the inclined connecting rod 12-4 is connected with the vertical sliding ring 12-5 to provide horizontal acting force for the vertical connecting rod 12-1, so that the vertical connecting rod can vertically and horizontally slide in the filter pressing process.
Be equipped with first board 4 before a plurality of electroosmosis filter pressing units, be equipped with tailboard 14 after a plurality of electroosmosis filter pressing units, extrusion cylinder 6 install on first board 4, tailboard 14 supports the connecting plate of last level electroosmosis filter pressing unit.
The electroosmosis filter pressing unit further comprises a constant voltage gradient control system, the constant voltage gradient control system comprises a displacement sensor 21 and a power supply voltage adjusting module, the displacement sensor 21 detects the thickness of the mud cake and feeds the mud cake back to the power supply voltage adjusting module so as to adjust the voltage between the cathode plate assembly 27 and the anode plate assembly 26, and constant voltage gradient electroosmosis dehydration is realized. The power supply voltage adjusting module can be arranged in the controller 25 or can be arranged separately, the power supply supplies power to the anode plate assembly 26 and the cathode plate assembly 27 through the power line 17 through the controller 25, and the power supply voltage of the anode plate assembly 26 and the cathode plate assembly 27 is controlled through the control bus 16.
A barrier strip 28 for blocking the anode plate assembly 26 is arranged on one side of the cylinder 18 close to the anode plate assembly 26, the displacement sensor 21 detects the distance from the anode plate assembly 26 to the barrier strip 28 and the distance from the cathode plate assembly 26 to the barrier strip 28 in real time, indirectly detects the real-time thickness of the mud cake, transmits a thickness signal to the controller 25, sends a signal to the power supply voltage adjusting module through the processing of the controller 25 so as to change the reference voltage, and adjusts the voltage at two ends of the mud cake in real time so that the voltage gradient on the mud cake is constant.
The push rod support 10 is installed on the barrel 18, the mud cutting push rod 9 and the mud pushing push rod 8 are installed on the push rod support 10 and can independently slide up and down, the mud cutting push rod 9 is always below the mud pushing push rod 8, the anode plate assembly 26 and the cathode plate assembly 27 freely slide on the barrel 18, and the anode plate assembly 26 and the cathode plate assembly 27 cannot slide off the barrel under the limitation of the barrier strips 28. A through cylinder 18 groove is formed under a push bar of the mud push rod 8 and is used for exposing an anode dry mud layer outside the cylinder and then cutting off the anode dry mud layer, a filtrate buffer tank 29 buffers filter-pressed liquid into one tank to serve as a water source for filter cloth cleaning, a water pump 30 pumps the filtrate out and sprays the filter cloth through a filter cloth cleaning water spray pipe 22, and the filter cloth can move along with the sliding of the cathode plate assembly 27, so that a spraying point moves from the center of the filter cloth to the outside for one circle. Set up filtrating buffer tank 29 and be used for collecting the moisture that the pressure was filtered out barrel 18 circumference slope upwards is equipped with a plurality of filter cloth and washs spray pipe 22, suction pump 30 take out the water in filtrating buffer tank 29 and wash the filter cloth through filter cloth washing spray pipe 22. The filtrate buffer tank 29, the water pump 30, the pneumatic ball valve 31, the filtrate buffer tank water inlet 32 and the filtrate buffer tank water outlet 33 form a filtrate buffer unit, and a water source is provided for cleaning filter cloth. The water inlet 32 of the filtrate buffer tank is lower than the water outlet pipe 27-4 of the cathode plate assembly, and in the electroosmosis filter pressing process, filtrate flows into the filtrate buffer tank 29 under the action of gravity until the liquid in the tank is full, and the filtrate is automatically discharged from the water outlet 33 of the filtrate buffer tank.
One of the key parts for realizing the electro-osmosis is that the electrode plate comprises an anode plate assembly 26 and a cathode plate assembly 27, the anode plate 26-2 is arranged on the anode cover plate 26-1, the sealing installation is realized through a sealing ring, and a mud inlet pipe 26-3 penetrates through the anode plate 26-2 and the anode cover plate 26-1 to enable mud to enter the electro-osmosis chamber. The cathode piston plate 27 is composed of a cathode cover plate 27-1, a cathode plate 27-2, a cathode pressing ring 27-3, a water outlet pipe 27-4, filter cloth and a sealing ring, wherein the cathode plate 27-2 is installed on the cathode cover plate 27-1, the filter cloth covers the cathode plate 27-2, the filter cloth is pressed tightly on the cathode plate 27-2 by the cathode pressing ring 27-3, the sealing ring is installed on the cathode cover plate 27-1 and the cathode plate 27-2 to play a role in sealing, a plurality of salient points are arranged on the cathode cover plate 27-1, gaps are formed among the salient points, water penetrates through the filter cloth and the anode plate during electroosmosis, and then flows to the water outlet pipe 27-4 from the gaps on the.
The frame is provided with a head plate 4, a tail plate 14, a frame slide rail 24, a mud pushing rod slide rail 5, a mud cutting rod slide rail 13 and a link mechanism slide rail 7, a support lug 15 arranged on the barrel 18 is provided with a chute 19, and the chute 19 is tightly matched with the frame slide rail 24, so that the filter pressing unit can stably slide on the guide rail and can not incline. In the whole device operation process, the mud cutting push rod 9, the mud pushing push rod 8 and the orthogonal sliding connecting rod mechanism 12 slide on the corresponding slide rails.
The working principle of the device is as follows:
the starting state is set to be that all cavity volumes reach the minimum and the anode plate assembly is tightly attached to the pole plate stop strip, the horizontal connecting rod in the orthogonal sliding connecting rod mechanism is in the horizontal state, at the moment, the controller sends out a corresponding instruction, the mud cutting push rod and the mud pushing push rod are lowered to the upper side of the mud feeding pipe, so that the mud pushing push rod on the mud cutting push rod can block the anode plate assembly to slide leftwards, meanwhile, the anode plate acts through the limiting cylinder, and the anode plate is enabled not to slide through the mud cutting seam through the cooperation of the anode plate and the mud pushing push rod through the stress. When the electroosmosis chamber is pushed to the maximum by mud, the anode assembly plate is tightly attached to the piston rod of the push bar and the anode plate limiting cylinder, the mud is under the action of continuous feeding pressure, the pressure applied to the mud is 1.5-2.0MPa, the mud is continuously pumped in, moisture enters a water outlet gap on the cathode cover plate through the filter cloth and the cathode plate and flows into the filtrate buffer tank from the water outlet pipe, the mud is left in the electroosmosis filter pressing cavity and is dehydrated through feeding for a period of time, the electroosmosis filter pressing chamber is filled, the mud cannot enter, the mud stops entering, and preliminary dehydration is realized.
And then the extrusion oil cylinder starts to provide pressure for the filter pressing chamber, namely, force is applied through the pole plate push column. The power module is the negative and positive plate power supply, begin to the electro-osmosis filter-pressing dehydration of mud, the change that mud cake thickness can not stop in this process, measure the thickness of mud through displacement sensor is indirect in real time, then there is the voltage on the negative and positive plate in every cavity of controller regulation, make the voltage gradient that receives on the whole electro-osmosis in-process mud cake be invariable, the positive pole sludge blanket becomes more than dry resistance extremely sharply rising after the electro-osmosis filter-pressing certain time, in order to keep the efficiency of electro-osmosis and practice thrift the electric energy this moment, cut mud mechanism and begin work.
Before the mud cutting mechanism acts, the dry mud layer needs to be moved to a mud cutting gap, the controller sends an instruction to retract the piston of the anode plate limiting cylinder, and the mud cutting push rod and the mud pushing push rod return to the initial state and generally rise to the highest point. After the actions are finished, the cylinder body sliding oil cylinder acts, the distance from the anode plate assembly to the barrier strip is determined according to the distance measured by the displacement sensor, the distance that the connecting rod mechanism sliding rail needs to be lifted is determined, the connecting rod mechanism sliding rail is lifted under the action of the cylinder body sliding oil cylinder, the corresponding cylinder body can move to the connecting plate on the right side, the anode dry mud layer is exposed to a mud cutting gap on the cylinder body, the mud cutting cylinder drives the mud cutting rod sliding rail to act downwards, the mud cutting push rod slides to the lowest position, and the dry mud layer is separated from the whole mud cake by cutting, then the mud pushing cylinder drives the mud pushing rod slide rail to move downwards, and the mud pushing push rod slides to the lowest position to push the dry mud layer out of the cylinder body, so that the dry mud layer is cut off and partial mud discharge is realized, then the cylinder body sliding oil cylinder drives the connecting rod mechanism slide rail to move downwards, the orthogonal sliding connecting rod mechanism is restored to the initial state, namely the horizontal connecting rod is kept horizontal, and at the moment, the cavity is closed again.
And (3) repeating the action after the mud feeding is finished after the chamber is closed, and certainly, the action of releasing and blocking the sliding of the anode piston plate is not required to be repeated, namely electroosmotic filter pressing, mud cutting and electroosmotic filter pressing … are carried out until all the mud in the chamber is completely cut off, and one electroosmotic filter pressing period is finished.
After a plurality of electroosmosis filter pressing cycles, the filter cloth begins to be cleaned, a pneumatic ball valve and a water suction pump are started, water in a filtrate buffer tank is pumped out and flows to a filter cloth cleaning water spray pipe, the water is sprayed to the filter cloth through an inclined pore on a cylinder body, the sliding mechanism action of an anode plate is stopped at the moment, the anode plate is tightly attached to a pushing bar of a mud pushing push rod, a cylinder body sliding oil cylinder moves up and down, so that the cathode plate component slides left and right in the cylinder body ceaselessly, the water sprayed out of the pore can clean the whole filter cloth, namely, a water column spraying falling point moves ceaselessly from the center of the filter cloth.
Although the embodiments have been described and illustrated separately, it will be apparent to those skilled in the art that some common techniques may be substituted and integrated between the embodiments, and reference may be made to one of the embodiments not explicitly described, or to another embodiment described.
The foregoing is illustrative of the preferred embodiments of the present invention only and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. In general, all changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.
Claims (5)
1. An energy-saving electroosmosis sludge high-dryness dewatering system comprises:
the device comprises a plurality of electroosmosis filter-pressing units, wherein a filter-pressing cavity is arranged in each electroosmosis filter-pressing unit, electroosmosis and filter-pressing dehydration are carried out after feed dehydration is realized in the filter-pressing cavity, and a mud cutting mechanism starts to carry out mud cutting action at intervals along with reduction of the water content of sludge on the anode plate side of the electroosmosis filter-pressing units;
the mud cutting mechanisms correspond to the electroosmosis filter pressing units one by one, mud cutting gaps are formed in the anode plate sides of the corresponding electroosmosis filter pressing units, and the mud cutting mechanisms cut off the sludge layers on the anode plate sides of the electroosmosis filter pressing units through the mud cutting gaps at intervals;
the frame is used for installing the electro-osmosis treatment units and the mud cutting mechanism;
adjusting the voltage between an anode plate assembly (26) and a cathode plate assembly (27) of the electro-osmotic filter press unit according to the thickness of the mud cake in the filter press chamber, so that the voltage per unit distance of the mud cake is constant;
the electroosmosis filter pressing unit further comprises a constant voltage gradient control system, the constant voltage gradient control system comprises a displacement sensor (21) and a power supply voltage adjusting module, the displacement sensor (21) detects the thickness of the mud cake and feeds the mud cake back to the power supply voltage adjusting module so as to adjust the voltage between the cathode plate assembly (27) and the anode plate assembly (26) and realize constant voltage gradient electroosmosis dehydration;
the electroosmosis filter pressing unit comprises an anode plate assembly (26), a cathode plate assembly (27) and a cylinder (18), the cylinder (18) is mounted on a rack slide rail (2) of a rack, the anode plate assembly (26) and the cathode plate assembly (27) are slidably arranged in the cylinder (18), and a filter pressing chamber is a space formed by the wall of the cylinder, the anode plate assembly (26) and the cathode plate assembly (27); the barrel (18) is provided with a mud cutting gap for the mud cutting mechanism to execute mud cutting action, when mud cutting is needed, the barrel (18) is moved to enable the mud cutting gap to be arranged in the filter-pressing cavity and close to the anode plate assembly (26), and the barrel (18) is moved to enable the mud cutting gap to leave the filter-pressing cavity in a non-mud cutting state;
the electroosmosis filter pressing unit further comprises a connecting plate (11), the connecting plate (11) is also arranged on a rack slide rail (2) of the rack, and the cathode plate assembly (27) is fixedly connected with the connecting plate (11) through a polar plate push column (20); the anode plate component (26) is also connected with a polar plate push column (20), and the polar plate push column (20) is driven under the action of the power part to extrude the filter pressing chamber;
the electroosmosis filter pressing unit further comprises an orthogonal sliding connecting rod mechanism, at least one end of the orthogonal sliding connecting rod mechanism is connected to the cylinder body (18), one end of the orthogonal sliding connecting rod mechanism is connected to the connecting plate (11), and the relative position of the cylinder body (18) and the filter pressing cavity is adjusted through movement of the driving end of the orthogonal sliding connecting rod mechanism.
2. The energy-saving electroosmosis sludge high-dryness dewatering system according to claim 1, characterized in that: cut mud mechanism and include push rod support (10), cut mud push rod (9) and push away mud push rod (8), the one end of push rod support (10) install on barrel (18), cut mud push rod (9) and push away mud push rod (8) and slide in order to realize cutting mud and pushing away mud on push rod support (10), a plurality of equal sliding connection of mud push rod (9) of cutting mud mechanism are on the mud pole slide rail (13) of cutting of frame, a plurality of equal sliding connection of mud push rod (8) of pushing away of cutting mud mechanism are on the mud pole slide rail (5) of pushing away of frame.
3. The energy-saving electroosmosis sludge high-dryness dewatering system according to claim 1, characterized in that: a barrier strip (28) used for blocking the anode plate assembly (26) is arranged on one side, close to the anode plate assembly (26), of the barrel (18), the displacement sensor (21) detects the distance from the anode plate assembly (26) to the barrier strip (28) and the distance from the cathode plate assembly (26) to the barrier strip (28) in real time, the real-time thickness of the mud cake is indirectly measured, a thickness signal is transmitted to the controller (25), the thickness signal is processed by the controller (25) and is transmitted to the power supply voltage adjusting module to change the reference voltage, and the voltage at two ends of the mud cake is adjusted in real time so that the voltage gradient on the mud cake is constant.
4. The energy-saving electroosmosis sludge high-dryness dewatering system according to claim 1, characterized in that: set up filtrating buffer tank (29) and be used for collecting the moisture that the pressure filtered out barrel (18) circumference slope is equipped with a plurality of filter cloth and washs spray pipe (22), and water pump (30) are taken out the water in filtrating buffer tank (29) and are washd the filter cloth through filter cloth washing spray pipe (22).
5. The energy-saving electroosmosis sludge high-dryness dewatering system according to claim 2, characterized in that: barrel (18) first half and latter half all have the groove of fixed width and this groove to run through the barrel to as cutting mud gap, push rod support (10) be located barrel (18) and go up the groove of opening directly over, cut mud push rod (9) including the draw runner of two steel wires in bottom, both sides and the clamp plate at top, the sliding ring of clamp plate top is used for with cutting mud pole sliding rail connection, it passes to be hollow the strip that pushes away that is used for pushing away the mud push rod in the middle of the clamp plate, push away mud push rod (8) including the strip that pushes away of bottom, the draw runner of both sides and the layering at top, cut mud push rod (9) are located push away mud push rod (8) below all the time.
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| CN110282857B (en) * | 2019-06-17 | 2023-12-15 | 河南工程学院 | Spiral propulsion combined biomass electroosmosis sludge dewatering device and method |
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| CN104163557A (en) * | 2014-08-12 | 2014-11-26 | 嘉兴学院 | Layer-by-layer electroosmosis method and device for dewatering energy-containing sludge |
| CN106865944A (en) * | 2017-02-23 | 2017-06-20 | 北京海斯顿水处理设备有限公司 | A kind of vacuum electric permeates sludge drying device and its method |
| CN107042027A (en) * | 2017-05-15 | 2017-08-15 | 广州铭远机械设备有限公司 | A kind of mud-scraping apparatus in sewage disposal device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104163557A (en) * | 2014-08-12 | 2014-11-26 | 嘉兴学院 | Layer-by-layer electroosmosis method and device for dewatering energy-containing sludge |
| CN106865944A (en) * | 2017-02-23 | 2017-06-20 | 北京海斯顿水处理设备有限公司 | A kind of vacuum electric permeates sludge drying device and its method |
| CN107042027A (en) * | 2017-05-15 | 2017-08-15 | 广州铭远机械设备有限公司 | A kind of mud-scraping apparatus in sewage disposal device |
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