Single filter cloth deep sludge dewatering equipment and working method thereof

Abstract

The present invention discloses a single filter cloth deep sludge dewatering device and a working method thereof. The device comprises an ultrasonic sludge conditioning tank, the sludge outlet of the ultrasonic sludge conditioning tank is connected to a sludge distributing mechanism, the sludge distributing mechanism comprises a plurality of sludge distributing nozzles; the device also comprises a press machine arranged on one side of the sludge distributing mechanism, a filter press plate mechanism is arranged at the bottom of the press machine, the filter press plate mechanism comprises a plurality of filter press plates stacked up and down, and a position sensor for limiting the depth of the sludge distributing nozzle is arranged on the upper surface of each filter press plate; the position between adjacent filter press plates is pulled by the press machine and switched between the closing and separation states; each sludge distributing nozzle is used to extend into between adjacent filter press plates for distributing sludge when the adjacent filter press plates are in the separation state, and is also used to withdraw from between the filter press plates after the sludge distributing is completed; the press machine is used to squeeze and maintain the sludge between the plurality of filter press plates after the sludge distributing nozzle withdraws. The present invention solves the problems of low dehydration rate and difficult replacement of filter cloth in the existing sludge dewatering mechanism.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge dewatering equipment, and in particular relates to single filter cloth deep sludge dewatering equipment and a working method thereof. Background Art

[0002] There are many types of sludge dewatering equipment on the market, and the commonly used ones are horizontal plate and frame filter press, spiral dewatering machine, cloth belt dewatering machine, centrifugal dewatering machine, etc. There are two guide blocks on each side of the filter press plate of these equipment, and the guide blocks and guide pillars are fitted. The filter cloth is wrapped around the filter press plate and performs reciprocating circulation. To replace the filter cloth, the four guide blocks must be removed first, which is labor-consuming and time-consuming and troublesome. In addition, the existing sludge conditioning tanks are divided into two types: with stirring and without stirring, but each sludge conditioning tank chooses to add flocculants to pre-treat the sludge; the purpose of stirring is to fully mix the sludge and flocculants evenly. The flocculants with stirring can more fully aggregate the water in the sludge than those without stirring, which is beneficial to the later dehydration; however, the water in the sludge is divided into surface water, free water and sludge capillary bound water. The surface water and free water can be fully aggregated by the flocculant, but the sludge capillary bound water is not easy to be aggregated and precipitated, so the dehydration rate of the existing sludge conditioning devices is low. Summary of the invention

[0003] The object of the present invention is to provide a single filter cloth deep sludge dewatering device and a working method thereof, so as to solve the problems of low dehydration rate and difficulty in replacing filter cloth in existing sludge dewatering devices.

[0004] The present invention adopts the following technical scheme: a single filter cloth deep sludge dewatering device, comprising an ultrasonic sludge conditioning tank for pre-treating sludge, the sludge outlet of the ultrasonic sludge conditioning tank is connected to two sludge spreading mechanisms, and the sludge spreading mechanisms include a plurality of sludge spreading nozzles arranged in parallel up and down;

[0005] It also includes a press machine arranged on one side of the mud distributing mechanism, a filter press plate mechanism is arranged at the bottom of the press machine, the filter press plate mechanism includes multiple layers of filter press plates stacked up and down, and a position sensor for limiting the entry depth of the mud distributing nozzle is arranged on the upper surface of each layer of filter press plate;

[0006] The positions between the adjacent filter press plates are pulled by the press machine and switched between the closing and separation states; each mud spreading nozzle is used to extend into the space between the adjacent filter press plates for mud spreading when the adjacent filter press plates are in the separation state, and is also used to withdraw from the space between the filter press plates after the mud spreading is completed; the press machine is used to squeeze and maintain the pressure of the sludge between the multiple filter press plates after the mud spreading nozzle withdraws;

[0007] Among them, the ultrasonic sludge conditioning tank specifically includes:

[0008] A tank body, with a mud inlet pipe on the top, a discharge port at the bottom, and an electric stirrer inside, the tank body is used to store and stir the sludge to be conditioned;

[0009] A plurality of ultrasonic vibration plates are evenly arranged on the side wall of the tank body and are respectively connected to the corresponding ultrasonic generators through signal line data; each ultrasonic vibration plate includes a vibration plate shell and a plurality of vibrators; the vibration plate shell is a hollow structure, which is embedded in the side wall of the tank body, and a plurality of vibrators are arranged in the vibration plate shell; each ultrasonic generator is used to control each vibrator in the corresponding ultrasonic vibration plate to vibrate at a high frequency, so as to increase the stirring force on the sludge to be conditioned.

[0010] Furthermore, the filter press plate mechanism comprises a plurality of filter press plates spaced apart from each other, and a filter cloth arranged between the filter press plates adjacent to each other;

[0011] Among them, each layer of filter press plate includes:

[0012] A filter press plate frame, comprising a bottom plate and a plurality of reinforcing plates connected and arranged above the bottom plate; the bottom plate is a hollow hexahedral structure with an open top;

[0013] A water-permeable plate is arranged above the filter press plate frame; a spacing space is formed between the filter press plate frame and the water-permeable plate, and the spacing space is used to provide a path for sewage discharge;

[0014] At least two water guide cups are respectively arranged on two opposite outer sides of the bottom plate, and are in the shape of a hollow funnel with both ends open and arranged vertically; each water guide cup is connected to the separation space through a drainage pipe;

[0015] A motorized roller and a passive roller are respectively connected and arranged beside the other two opposite outer sides of the bottom plate;

[0016] The arrangement of the filter cloth is as follows: it is pulled from the bottom of the electric roller of one filter press plate to the outside of the passive roller of the next filter press plate, and is wound from the bottom of the passive roller to the top of the permeable plate, and then extends to the top of the electric roller of this layer, and finally is led from the bottom of the electric roller to the next filter press plate; and in this way, it is wound in an S shape between the filter press plates.

[0017] Furthermore, the ultrasonic sludge conditioning tank also includes an auxiliary material storage tank connected to the top of the tank body, and the auxiliary material storage tank is used to place auxiliary materials for adjusting the pH value of the material.

[0018] Furthermore, the ultrasonic sludge conditioning tank also includes a flocculant filling port connected to the top of the tank body, and the flocculant filling port is used to add flocculant into the tank body.

[0019] Furthermore, in the filter press plate mechanism, a sealing ring is arranged at the bottom of the filter press plate frame.

[0020] Furthermore, a filter cloth cleaning water tank is arranged beside the bottom filter press plate. The filter cloth cleaning water tank is a box filled with clean water. The filter cloth cleaning water tank is used for passing the filter cloth led out from the bottom filter press plate and cleaning the filter cloth.

[0021] Furthermore, the head and tail of the filter cloth are connected to a filter cloth deviation correcting mechanism located beside the filter press plate mechanism.

[0022] Furthermore, a discharging belt conveyor for conveying the mud cake is arranged at the bottom of the filter press plate mechanism.

[0023] The second technical solution adopted by the present invention is a working method of a single filter cloth deep sludge dewatering device, which is implemented according to the following steps:

[0024] S1, transporting the sludge to the ultrasonic sludge conditioning tank for pretreatment;

[0025] S2. The sludge pre-treated by the ultrasonic conditioning tank is pumped to the mud spreading mechanism; the main cylinder piston of the press moves upward, driving the multi-layer filter press plates to open one by one; the mud spreading nozzle of the mud spreading mechanism enters each layer of the filter press plates; the electric roller drives the filter cloth to move on each layer of the filter press plates, and the sludge flows into the filter cloth of each filter press plate until the sludge covers the filter cloth and the filter press plate electric roller stops; at this time, the mud spreading mechanism is pulled back to its original position; next, the main cylinder of the press moves downward, closing each layer of the filter press plates and continuing to press down to maintain pressure; at the same time, the sewage flows downstream to the sewage collection tank through the drainage pipes on both sides of the filter press plates;

[0026] S3. After the filtration is completed, the main cylinder of the press machine moves upward to open all the filter press plates. The electric rollers of each layer of filter press plates rotate to drive the filter cloth to send the mud cake out and drop it to the discharge belt conveyor for delivery.

[0027] The beneficial effects of the present invention are as follows: an ultrasonic vibration mechanism is added to the tank body of the sludge conditioning tank, and the effect of ultrasonic waves destroys the flocs of part of the sludge, accelerates the dissolution of soluble dirt, and also accelerates the aggregation effect of the flocculant, thereby improving the dehydration rate of the filter press, which helps to achieve the purpose of deep dehydration of the sludge. At the same time, a single-layer filter cloth is wound in an S shape between each filter press plate, and all filter press plates use a whole filter cloth, which can be tensioned at one time, and the filter cloth replacement operation is simple; a filter cloth cleaning water tank is set, and the filter cloth can be conveniently cleaned during the unwinding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of an ultrasonic sludge conditioning tank of a single filter cloth deep sludge dewatering equipment of the present invention;

[0029] Figure 2 It is a schematic diagram of the connection relationship between the ultrasonic vibration plate and the ultrasonic generator in the ultrasonic sludge conditioning tank of the single filter cloth deep sludge dehydration equipment of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a filter press plate of a single filter cloth deep sludge dewatering equipment of the present invention;

[0031] Figure 4 for Figure 3 AA section view;

[0032] Figure 5 It is a schematic diagram of the arrangement of filter cloths of a filter press plate mechanism for deep sludge dehydration of the present invention;

[0033] Figure 6 It is a schematic diagram of the overall structure of a single filter cloth deep sludge dewatering device of the present invention;

[0034] Figure 7 for Figure 6 The structural schematic diagram of other mechanisms of the ultrasonic sludge conditioning tank is not included.

[0035] 1. Mud inlet pipe, 2. Tank body, 3. Inspection manhole, 4. Electric agitator, 5. Auxiliary material storage tank, 6. Flocculant filling port, 7. Ultrasonic vibration plate, 71. Vibration plate shell, 72. Vibrator, 8. Discharge port, 9. Ultrasonic generator, 10. Signal line, 11. Filter press plate frame, 111. Bottom plate, 121. Reinforcement plate, 12. Permeable plate, 13. Sealing ring, 14. Water guide cup, 15. Electric roller, 16. Passive roller, 17. Filter cloth, 18. Drain pipe, 19. Press, 20. Mud distribution mechanism, 21. Filter cloth cleaning water tank, 22. Filter cloth deviation correction mechanism. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] The present invention provides a sludge dewatering mechanism, characterized in that: Figure 6 As shown, it includes an ultrasonic sludge conditioning tank for pre-treating sludge, the sludge outlet of the ultrasonic sludge conditioning tank is connected to two sludge spreading mechanisms 20, the sludge spreading mechanisms 20 include a plurality of sludge spreading nozzles arranged in parallel up and down; it also includes a press 19 arranged on one side of the sludge spreading mechanism 20, a filter press plate mechanism is arranged at the bottom of the press 19, the filter press plate mechanism includes a plurality of filter press plates stacked up and down, and a position sensor for limiting the entry depth of the sludge spreading nozzle is arranged on the upper surface of each filter press plate;

[0038] The positions between adjacent filter press plates are pulled by the press and switched between the closed and separated states; each mud distribution nozzle is used to extend into between adjacent filter press plates for mud distribution when the adjacent filter press plates are in the separated state, and is also used to withdraw from between the filter press plates after the mud distribution is completed; the press 19 is used to squeeze and maintain the pressure of the sludge between the multiple layers of filter press plates after the mud distribution nozzle withdraws.

[0039] Among them, Figure 1 and Figure 2 As shown, the ultrasonic sludge conditioning tank specifically includes a tank body 2 and a plurality of ultrasonic vibration plates 7 arranged on the outer wall of the tank body 2. The tank body 2 is an inverted conical cylinder, and a mud inlet pipe 1 is arranged on the top of the tank body 2. The sludge from the sewage treatment plant is pumped into the tank body 2 by a sludge pump; an electric stirrer 4 is arranged inside the tank body 2, and the electric stirrer 4 is connected to a stirring reduction motor, and the electric stirrer 4 is used to stir the sludge at high speed; a discharge port 8 is arranged at the bottom of the tank body 2, and the stirred sludge is discharged through the discharge port 8 and can enter the next process.

[0040] A plurality of holes are evenly formed on the side wall of the tank body 2 , and an ultrasonic vibration plate 7 is installed on each hole. Each ultrasonic vibration plate 7 is respectively connected to an ultrasonic generator 9 via a signal line 10 .

[0041] Each ultrasonic vibration plate 7 specifically includes a vibration plate shell 71 and a plurality of vibrators 72. The vibration plate shell 71 is a hollow sealed structure, and each vibration plate shell 71 is embedded in a hole opened on the side wall of the tank body 2. A plurality of vibrators 72 are arranged in the vibration plate shell 71, and each vibrator 72 is data-connected to a corresponding ultrasonic generator 9 through a signal line 10. Each ultrasonic generator 9 controls the plurality of vibrators 72 in the corresponding vibration plate shell 71 to vibrate at a high frequency, and the agitation effect of the sludge inside the tank body 2 is increased by the high-frequency vibration of the plurality of vibrators 72.

[0042] The frequency of ultrasonic waves is above 20kHZ. Due to the high frequency and short wavelength, human ears cannot hear it. Therefore, the propagation direction is good and the penetration ability is strong. The ultrasonic generator 9 generates a high-frequency ultrasonic signal, which is transmitted to the actuator, i.e., the vibrator 72. The vibrator 72 transmits to the sludge in a high-frequency conversion mode of more than 20,000 times per second of compression force and pressure reduction interaction, i.e., the sludge vibrates more than 20,000 times per second. The high-frequency vibration will produce ultra-fine bubbles, which propagate to the outside at a speed of about 10cm / s. When the ultra-fine bubbles propagate outward and reach the critical pressure, they will burst instantly. The bursting pressure can reach more than tens of megapascals. This process is called "cavitation", thereby destroying soluble dirt. Due to the ultrasonic cavitation, the insoluble dirt and water in the sludge will be quickly dispersed and emulsified at the interface. The cavitation bubbles will generate a circulation during the oscillation process, i.e., the so-called acoustic flow, which can cause a high velocity gradient stress on the bubble surface. The high-speed micro-jet generated by ultrasonic cavitation at the interface between solid and liquid corrodes the solid surface, increases the stirring force, accelerates the dissolution of soluble dirt, and strengthens the flocculant effect. Due to the high frequency of ultrasonic vibration, the friction between sludge particles is accelerated, and the temperature will gradually rise, which also accelerates the aggregation effect of flocculants. The high-frequency vibration of ultrasound will produce physical effects such as cavitation, radiation pressure, mechanical heat, and acoustic flow. The role of ultrasound is to destroy part of the sludge flocs, causing the organic matter with negatively charged groups on the surface of the particles to fall off. The comprehensive physical effect of ultrasound + the chemical effect of flocculants can reduce the binding force between sludge particles and molecular water, thereby increasing the dehydration rate of the filter press and helping to achieve the purpose of deep dehydration of sludge.

[0043] In some embodiments, Figure 7 As shown, the filter press plate mechanism includes multiple layers of filter press plates spaced apart from each other, and filter cloths 17 arranged between the upper and lower adjacent filter press plates.

[0044] like Figure 3 As shown, each layer of filter press plate includes a filter press plate frame 11 and a water permeable plate 12. The filter press plate frame 11 includes a bottom plate 111 and a plurality of reinforcing plates 121 connected and arranged above the bottom plate 111, and the bottom plate 111 is a hollow hexahedron structure with an open top. The water permeable plate 12 is arranged above the filter press plate frame 11, and a space is formed between the filter press plate frame 11 and the water permeable plate 12, and the space is used to provide a path for the sewage generated by the filter press to be discharged.

[0045] Drain pipes 18 connected to the interval space are respectively provided on the two relatively outer sides of the bottom plate 111. A water guide cup 14 is provided outside each drain pipe 18, and the sewage collected in the interval space will be led out through the drain pipe 18 and the water guide cup 14. Two or more water guide cups 14 can be provided on each side. Each water guide cup 14 is a hollow funnel shape that is vertically arranged and open at both ends. When the filter press is performed, each layer of the filter plate will cling to and squeeze the sludge, and the water guide cups 14 at corresponding positions on adjacent layers of the filter plate can be fitted together to form a coaxial drainage pipe to discharge sewage to the outside, so there is no need to set a separate drainage pipe for each layer of the filter plate. The structure is simple, the cost is low, and the reliability is high.

[0046] The other two opposite outer sides of the bottom plate 111 are respectively provided with a motorized roller 15 and a passive roller 16. The motorized roller 15 is used to drive the filter cloth 17 to move.

[0047] Among them, Figure 5 As shown, the arrangement of the filter cloth 17 is as follows: it is pulled from the bottom of the electric roller 15 of one filter press plate to the outside of the passive roller 16 of the next filter press plate, and is wound from the bottom of the passive roller 16 to the top of the permeable plate 12 of the layer, and then extends to the top of the electric roller 15 of the layer, and finally leads from the bottom of the electric roller 15 to the next filter press plate; and in this way, it is wound in an S shape between the layers of filter press plates. A filter cloth 17 is used, driven by a reduction motor, to realize the unwinding and winding of the filter cloth when the filter press plate is opened. The filter cloth 17 is arranged in an S-shaped cloth winding, and all filter press plates use a whole filter cloth, which can be tensioned at one time, making it easy to replace the filter cloth and more convenient to clean the filter cloth.

[0048] In some embodiments, Figure 1 As shown, the ultrasonic sludge conditioning tank also includes an auxiliary material storage tank 5 connected to the top of the tank body 2, and the auxiliary material storage tank 5 is used to place auxiliary materials for adjusting the pH value of the material. Alkaline substances and acidic substances are used to adjust the pH value of the material. The pH value of general sludge is basically moderate and no addition is required, but the pH value of sludge in special industries needs to be adjusted.

[0049] In some embodiments, Figure 1 As shown, the ultrasonic sludge conditioning tank also includes a flocculant filling port 6 connected to the top of the tank body 2. The flocculant filling port 6 is used to add flocculants into the tank body 2. The chemical action of the flocculant allows bound water and free water to aggregate. The free water is the surface water between the sludge particles. The ultrasonic sludge conditioning tank can also include a maintenance manhole 3 arranged on the top of the tank body 2 for easy maintenance.

[0050] In some embodiments, Figure 4 As shown, in the filter press plate mechanism, a sealing ring 13 is arranged at the bottom of the filter press plate frame 11. When the upper and lower filter press plates are closed, the sealing ring 13 of the upper layer will be pressed on the lower filter press plate and maintain the seal.

[0051] In some embodiments, Figure 7 As shown, a filter cloth cleaning water tank 21 is arranged beside the bottom filter press plate. The filter cloth cleaning water tank 21 is a box body filled with clean water. The filter cloth cleaning water tank 21 is used for the filter cloth 17 led out from the bottom filter press plate to pass through and clean the filter cloth 17. The function of the cloth cleaning water tank is that after the filter press work is completed and the filter press plate has removed all the mud cakes, the cloth reeling reduction motor starts to rewind. During the rewinding process, the filter cloth 7 will enter the filter cloth cleaning water tank. Four high-pressure cleaning nozzles are arranged in the filter cloth cleaning water tank to clean the remaining mud cake residue on the filter cloth again to ensure the reliability of the operation of the filter cloth tensioning and deviation correction mechanism. The water for cleaning the filter cloth comes from the wastewater collection tank and is pumped out by a high-pressure pump. The sewage obtained after cleaning flows back into the wastewater collection tank after filtration.

[0052] In some embodiments, Figure 3 As shown, another passive roller 16 is arranged side by side with the passive roller 16. Figure 5 As shown, the winding and unwinding ends of the filter cloth 17 can also be connected to a filter cloth correction mechanism 22. The whole machine uses a filter cloth, which is driven by a reduction motor to realize the unwinding and winding of the filter cloth when the filter is pressed and the filter plate is opened; the filter cloth tensioning mechanism consists of a tensioning cylinder, a tensioning roller, a linear guide rail, and a gear rack mechanism. During the winding process, the filter cloth will deviate uncontrollably, and two sets of filter cloth correction mechanisms are installed at the winding and unwinding ends to ensure that the filter cloth does not deviate.

[0053] In some embodiments, a discharging belt conveyor for conveying the mud cake is provided at the bottom of the filter press plate mechanism.

[0054] The present invention also provides a working process of a single filter cloth deep sludge dewatering device, which is implemented according to the following steps:

[0055] S1. The moisture content of the sludge transported from the sewage treatment plant is about 80-90%, and it has good fluidity. It is pumped into the tank body 2 of the ultrasonic sludge conditioning tank by a sludge pump. The electric stirrer 4 is connected to the stirring reduction motor, and the stirring reduction motor is turned on and rotated continuously. When the sludge is about to be filled, the pumping stops, and the stirring reduction motor continues to operate. Turn on each ultrasonic generator 9 to generate an ultrasonic signal and send it to the vibrator 72 in each ultrasonic vibration plate 7. After receiving the signal, the vibrator 72 generates high-frequency vibration, which increases the stirring force of the sludge to be conditioned. The sludge pretreated by the ultrasonic sludge conditioning tank has part of the bound water in the sludge particles separated, and the chemical action of the flocculant allows the bound water and free water to aggregate.

[0056] S2. The sludge pre-treated by the ultrasonic conditioning tank is pumped to the mud spreading mechanism 20 by the sludge pump. The mud spreading mechanism 20 can be provided with a mud spreading machine on the left and right. At this time, the main cylinder piston of the press 19 moves upward, and the pressing plate of the press 19 drives the multi-layer filter press plates to open one by one until the last one is fully opened, and the press 19 stops. Then the solenoid valve of the mud spreading mechanism 20 is actuated, and the pressure oil pushes the mud spreading cylinder, and the cylinder pushes the left and right mud spreading mechanisms 20 forward. When the mud spreading mouth of the mud spreading mechanism 20 enters each layer of filter press plates with a length of about 100 mm, the position sensor provided on the upper surface of each layer of filter press plates sends a signal to stop the solenoid valve of the control cylinder. Then the electric roller 15 of each layer of filter press plate is powered and rotated, and the electric roller 15 drives the filter cloth 17 to move on the filter press plate. Then the dragon motor of each layer of mud spreading bucket is active, and the pneumatic valve is opened. The sludge slowly flows into the filter cloth 17 of each filter press plate under the push of the auger. The movement of the filter cloth 17 drives the sludge forward until the sludge covers the filter cloth 17 and the electric roller 15 of the filter press plate stops. At this time, the oil cylinders of the left and right mud spreading mechanisms 20 are activated to pull the mud spreading mechanisms 20 back to their original positions. After an interval of 5 seconds, the main cylinder of the press 19 moves downward, closing each layer of filter press plates and continuing to press down. When the pressure between each layer of filter press plates continues to rise and the pressing plate of the press 19 moves downward very slowly, the main cylinder of the press 19 stops and enters the pressure holding process, and the pressure holding lasts for 15 minutes. The pressure-maintaining process is also a process of gradual dehydration of the sludge. The water inside the sludge seeps out from the sludge particles during the application of high pressure and gathers inside each layer of the filter press plate, and then flows through the drainage pipes 18 on both sides of the filter press plate to the sewage collection tank.

[0057] S3, when the filter pressing is finished, the main cylinder of the press machine 19 moves upward to open all the filter pressing plates. After opening, the motorized rollers 15 of each layer of filter pressing plates rotate, the motorized rollers 15 drive the filter cloth 17, the filter cloth 17 drives the pressed mud cake forward, and sends the mud cake to the discharge belt conveyor, and the belt conveyor sends the mud cake out of the workshop. At this time, a filter pressing process is finished.

[0058] During the period when the press 19 is dehydrating the sludge, the sludge pump pumps the sludge in the ultrasonic sludge conditioning tank to the left and right sludge distribution mechanisms 20 to prepare for the next sludge distribution.

[0059] The single filter cloth deep sludge dewatering equipment of the present invention adds an ultrasonic vibration mechanism to the tank body, and adds a high-frequency vibration process to the basic treatment process of ordinary stirring. Due to the high frequency of ultrasonic vibration, cavitation, radiation pressure, mechanical heat, acoustic flow and other physical effects will be generated. The effect of ultrasonic wave is to destroy the flocs of part of the sludge, so that the organic matter with negatively charged groups on the surface of the particles will fall off, the friction between the sludge particles will be accelerated, and the temperature will gradually rise, which will accelerate the dissolution of soluble dirt and the aggregation effect of flocculant. Therefore, the comprehensive physical effect of ultrasound combined with the chemical effect of flocculant can reduce the binding force between sludge particles and molecular water, thereby improving the dehydration rate of the filter press and helping to achieve the purpose of deep sludge dehydration. At the same time, the filter press plate mechanism of the single filter cloth deep sludge dewatering equipment of the present invention is provided with a drainage pipe and a water guide cup for discharging sewage on both sides of the filter press plate of each layer to discharge sewage, and the water guide cups arranged on the upper and lower filter press plates are in corresponding positions. When the filter press plates overlap, the water guide cups will fit together to form a drainage channel; at the same time, a single-layer filter cloth is wound in an S shape between each filter press plate, and the filter cloth replacement operation is simple; a filter cloth cleaning water tank is provided, and the filter cloth can be cleaned during the unwinding process of the filter cloth. The entire working process of the single filter cloth deep sludge dewatering equipment of the present invention is controlled by a program, and the logic principle of pumping sludge to the left and right mud spreading mechanisms, the filter press opening the filter press plate, spreading mud, pressing and discharging cakes is followed in a cycle, and the entire working process can be fully automatically controlled by PLC, or manually operated.

Claims

1. A single filter cloth deep sludge dewatering equipment, characterized in that: It comprises an ultrasonic sludge conditioning tank for pre-treating sludge, the sludge outlet of the ultrasonic sludge conditioning tank being connected to a sludge spreading mechanism (20), the sludge spreading mechanism (20) comprising a plurality of sludge spreading nozzles arranged in parallel up and down; It also includes a press machine (19) arranged on one side of the mud distributing mechanism (20), a filter press plate mechanism being provided at the bottom of the press machine (19), the filter press plate mechanism comprising a plurality of filter press plates stacked up and down, a position sensor being provided on the upper surface of each filter press plate for limiting the entry depth of the mud distributing nozzle; The positions between the adjacent filter press plates are pulled by the press machine and switched between the closed and separated states; each mud spreading nozzle is used to extend into the space between the adjacent filter press plates to spread mud when the adjacent filter press plates are in the separated state, and is also used to withdraw from between the filter press plates after the mud spreading is completed; the press machine (19) is used to squeeze and maintain the pressure of the sludge between the multiple layers of the filter press plates after the mud spreading nozzle withdraws; Wherein, the ultrasonic sludge conditioning tank specifically comprises: A tank body (2) having a sludge inlet pipe (1) on the top and a discharge port (8) on the bottom, and an electric stirrer (4) inside, the tank body (2) being used to store and stir the sludge to be conditioned; A plurality of ultrasonic vibration plates (7) are evenly arranged on the side wall of the tank body (2) and are respectively data-connected to corresponding ultrasonic generators (9) via signal lines (10); each ultrasonic vibration plate (7) comprises a vibration plate shell (71) and a plurality of vibrators (72); the vibration plate shell (71) is a hollow structure, which is embedded in the side wall of the tank body (2), and the plurality of vibrators (72) are arranged in the vibration plate shell (71); each ultrasonic generator (9) is used to control each vibrator (72) in the corresponding ultrasonic vibration plate (7) to generate high-frequency vibration, so as to increase the stirring force on the sludge to be conditioned; The filter press plate mechanism comprises a plurality of filter press plates spaced apart from each other, and a filter cloth (17) arranged between the filter press plates adjacent to each other. Among them, each layer of filter press plate includes: A filter press plate skeleton (11), comprising a bottom plate (111) and a plurality of reinforcing plates (121) connected and arranged above the bottom plate (111); the bottom plate (111) is a hollow hexahedral structure with an open top; a water-permeable plate (12) disposed above the filter press plate frame (11); a spacing space is formed between the filter press plate frame (11) and the water-permeable plate (12), the spacing space being used to provide a path for sewage discharge; At least two water guide cups (14) are respectively arranged on two opposite outer sides of the bottom plate (111), and are in the shape of a hollow funnel arranged vertically and open at both ends; each water guide cup (14) is connected to the separation space via a drainage pipe (18); A motorized roller (15) and a passive roller (16), respectively connected and arranged beside the other two opposite outer side surfaces of the bottom plate (111); The filter cloth (17) is arranged in such a manner that it is pulled from the bottom of the motorized roller (15) of one filter press plate to the outside of the passive roller (16) of the next filter press plate, and is wound from the bottom of the passive roller (16) to the top of the water-permeable plate (12) of the layer, and then extends to the top of the motorized roller (15) of the layer, and finally is led from the bottom of the motorized roller (15) of the layer to the next filter press plate; and in this manner, it is wound in an S-shape between the filter press plates of each layer.

2. The single filter cloth deep sludge dewatering equipment according to claim 1, characterized in that: The ultrasonic sludge conditioning tank further comprises an auxiliary material storage tank (5) which is arranged in communication with the top of the tank body (2), wherein the auxiliary material storage tank (5) is used to store auxiliary materials for adjusting the pH value of the material.

3. The single filter cloth deep sludge dewatering equipment according to claim 2, characterized in that: The ultrasonic sludge conditioning tank further comprises a flocculant filling port (6) which is connected to and arranged at the top of the tank body (2), and the flocculant filling port (6) is used to add flocculant into the tank body (2).

4. The single filter cloth deep sludge dewatering equipment according to claim 1, characterized in that: In the filter press plate mechanism, a sealing ring (13) is provided at the bottom of the filter press plate frame (11).

5. A single filter cloth deep sludge dewatering equipment as claimed in claim 1 or 4, characterized in that: A filter cloth cleaning water tank (21) is arranged beside the filter press plate at the bottom layer. The filter cloth cleaning water tank (21) is a box body filled with clean water. The filter cloth cleaning water tank (21) is used to allow the filter cloth (17) drawn out from the filter press plate at the bottom layer to pass through and to clean the filter cloth (17).

6. A single filter cloth deep sludge dewatering equipment as claimed in claim 1 or 4, characterized in that: The filter cloth (17) is connected at its head and tail to a filter cloth deviation correction mechanism (22) located next to the filter press plate mechanism.

7. The single filter cloth deep sludge dewatering equipment according to claim 1, characterized in that: A discharging belt conveyor for conveying the mud cake is arranged at the bottom of the filter press plate mechanism.

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