Automatic sludge dewatering system

Abstract

The invention relates to the technical field of dewatering equipment, in particular to an automatic sludge dewatering system which comprises an inclined and rotatable centrifugal dewatering barrel mounted in an inclined fixed supporting barrel. An inclined injection channel capable of injecting sludge into the centrifugal dewatering barrel is arranged outside the centrifugal dewatering barrel, water outlet holes capable of discharging water are formed in the inner wall of the inclined injection channel, and the inner wall of the inclined injection channel is smooth. A spiral auger dewatering assembly used for receiving sludge subjected to primary dewatering through the centrifugal dewatering barrel is arranged below the centrifugal dewatering barrel, and the dewatering effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of dewatering equipment, and in particular to an automatic sludge dewatering system. Background Art

[0002] The main purpose of sludge dewatering is to reduce the volume and weight of sludge for subsequent treatment and disposal. Through dewatering, the water in the sludge can be removed to make it denser, thereby significantly reducing its volume and weight and reducing the cost of transportation and storage. Dewatered sludge is easier to store and transport, reducing the occupation and pollution risks of the environment. The dewatering process can concentrate the organic matter and nutrients in the sludge, which can be further utilized, such as producing organic fertilizers or bioenergy, to achieve resource recovery and energy utilization.

[0003] There are also many existing dewatering equipment. For example, Chinese patent application number 201911385321.7 discloses a centrifugal sludge dewatering equipment for hydraulic sludge removal, including a main body, a fixed rod and a motor. A dewatering box is installed inside the main body, and a dewatering gauze is placed inside the dewatering box. A screw cover is installed above the dewatering box, and a handle is placed above the screw cover. A main body cover is installed above the main body, and a rotating shaft is placed on the left side of the main body cover. A buckle is fixed to the right side of the main body cover. The fixed rod is installed on the left and right sides of the main body, and bolts are placed on the inner side of the fixed rod.

[0004] For another example, a Chinese patent with application number 202022559813.8 discloses a sludge dewatering device for water conservancy construction, including a box body and a base, the first gear is meshed and connected with the second gear, a rotating shaft is fixedly connected to the middle inner wall of the second gear, the rotating shaft is rotatably connected to the box body through a sealed bearing, a rotating column is sleeved on the upper outer wall of the rotating shaft, and a rotating tooth is sleeved on the lower outer wall of the rotating shaft.

[0005] The equipment involved in the above-mentioned patented technologies has not made any significant improvement in the control and optimization of dehydration, and is still somewhat insufficient in the protection and utilization of sludge. Summary of the invention

[0006] The purpose of the invention is to provide an automatic sludge dewatering system with better dewatering effect.

[0007] The above-mentioned object of the present invention is achieved through the following technical scheme: a sludge automatic dewatering system, comprising an inclined and rotatable centrifugal dewatering cylinder, the centrifugal dewatering cylinder is installed in an inclined fixed support cylinder, an inclined injection channel for injecting sludge into the centrifugal dewatering cylinder is arranged inside the centrifugal dewatering cylinder, a water outlet hole for discharging water is opened on the inner wall of the inclined injection channel, the inner wall of the inclined injection channel is smooth, and a spiral auger dewatering component for receiving the sludge after being dehydrated once by the centrifugal dewatering cylinder is arranged below the centrifugal dewatering cylinder.

[0008] As a preferred embodiment of the present invention, the inclined injection channel includes at least one section of spiral coil, and the spiral coil is inclined downward, and the lower end of the spiral coil is a sludge outlet and is inclined downward.

[0009] As a preferred embodiment of the present invention, a smooth arc-shaped protrusion is formed on the inner wall surface of the spiral coil, and the water outlet is opened on the back slope surface of the arc-shaped protrusion.

[0010] As a preferred embodiment of the present invention, an ultrasonic transducer is installed in at least one arc-shaped protrusion.

[0011] As a preferred embodiment of the present invention, the water outlet is connected to a water inlet pipe, and a water flow sensor is installed on the water inlet pipe.

[0012] As a preferred embodiment of the present invention, the water flow sensor communicates with a controller via wireless or wired means, and the controller has a sludge dewatering optimization module.

[0013] As a preferred embodiment of the present invention, the sludge dewatering optimization module is optimized using a legacy algorithm, and the legacy algorithm determines the objective function Objective Function = w1*E-w2*C, wherein E is the dewatering efficiency, C is the energy consumption, and w1 and w2 are weight coefficients for balancing the effects of dewatering efficiency and energy consumption.

[0014] As a preferred embodiment of the present invention, the arc-shaped protrusion is hemispherical and its diameter gradually decreases along the conveying path of the spiral coil, and the diameter of the spiral coil gradually decreases along the conveying path of the spiral coil. The spiral coil is in a conical spiral shape as a whole.

[0015] As a preferred embodiment of the present invention, an upper sealing end cover and a lower sealing end cover are respectively installed at the upper and lower end openings of the centrifugal dehydration cylinder, and the centrifugal dehydration cylinder can rotate around the upper sealing end cover and the lower sealing end cover. A sludge outlet is provided on the lower sealing end cover, and the sludge outlet is connected to a guide pipe that guides the sludge to the spiral auger dehydration assembly, and the outlet of the guide pipe is inclined downward.

[0016] As a preferred embodiment of the present invention, a circle of water filter layer is tensionedly connected to the inner wall of the centrifugal dehydration cylinder, and a water outlet channel that can be connected to the water filter layer from the outside to the inside is opened on the centrifugal dehydration cylinder. A bottom water storage tank that can receive water discharged from the water outlet channel is arranged below the fixed support cylinder.

[0017] The beneficial effects of the present invention are as follows: 1. The dehydration system has good protection for sludge, is not easy to destroy the beneficial components of the sludge, and has a good dehydration effect.

[0018] 2. The dehydration efficiency is fast and can work uninterruptedly.

[0019] 3. Dehydration is well controllable and can be optimized in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of the dehydration system in the embodiment;

[0021] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure from a lower side perspective of the middle upper part;

[0022] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure of the middle structure after the fixed support cylinder is removed and the structure is cut open;

[0023] Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure after removing the water filtration layer from the middle structure;

[0024] Figure 5 is a schematic diagram of a three-dimensional structure after the internal structure of the inclined injection channel in the embodiment is further optimized;

[0025] Figure 6 yes Figure 1 Schematic diagram of the three-dimensional structure from the bottom perspective. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0028] Examples, such as Figure 1-6As shown, a sludge automatic dewatering system includes an inclined and rotatable centrifugal dewatering cylinder 1, the centrifugal dewatering cylinder 1 is a cylindrical or approximately cylindrical cylinder with openings at the top and bottom, the centrifugal dewatering cylinder 1 is also generally a metal cylinder, such as a steel cylinder, the inclination angle is the angle between the axis direction of the centrifugal dewatering cylinder 1 and the ground, and it is preferably controlled between 45-80 degrees. Further, the centrifugal dewatering cylinder 1 is installed in an inclined fixed support cylinder 2, the fixed support cylinder 2 can be rectangular or cylindrical, etc., and also adopts a metal steel structure, the centrifugal dewatering cylinder 1 is rotatable relative to the fixed support cylinder 2, and a slewing support bearing, that is, a turntable bearing 51, can be installed between the fixed support cylinder 2 and the centrifugal dewatering cylinder 1, the outer ring of the turntable bearing 51 can be fixed to the inner part of the fixed support cylinder 2 by an existing fixing method, and the inner ring of the turntable bearing 51 can be fixed to the inner part of the centrifugal dewatering cylinder 1 by an existing method. Furthermore, an inclined injection channel 3 capable of injecting sludge into the centrifugal dehydration cylinder 1 is arranged outside the centrifugal dehydration cylinder 1, and a water outlet hole 30 capable of discharging water is opened on the inner wall of the inclined injection channel 3. The inner wall of the inclined injection channel 3 is smooth. The inclined injection channel 3 is a channel structure capable of injecting sludge into the centrifugal dehydration cylinder 1 in an inclined downward direction, and the angle between the direction of the inclined injection channel 3 discharging sludge and the ground is preferably controlled to be between 50-85 degrees, and when in use, the inclination angle of the inclined injection channel 3 is preferably greater than the inclination angle of the centrifugal dehydration cylinder 1. For example, if the angle between the direction of the inclined injection channel 3 discharging sludge and the ground is 80 degrees, then the angle between the centrifugal dehydration cylinder 1 and the ground is 70 degrees, which is convenient for better receiving the sludge and better protecting the sludge. In addition, the feature of the present application is that when the sludge starts to come in, it will be infiltrated by the water entering the water outlet 30. The purpose of this is that before the dehydration process, an appropriate amount of water is added through the water inlet, so that the object to be dehydrated can be fully moistened, and the friction caused by high-speed rotation during the dehydration process can be reduced, thereby avoiding damage to the object. That is, it will have a better protective effect on many beneficial sludges. In the dehydration process, an appropriate amount of water is added through the water outlet 30 into the inclined injection channel 3, which can adjust the humidity of the sludge and ensure that the humidity of the sludge during the dehydration process is maintained in a relatively balanced state, thereby improving the dehydration efficiency and effect.

[0029] The fixed support cylinder 2 and the inclined injection channel 3 can be fixedly installed on an existing frame or a truss or ceiling building of a factory building.

[0030] Furthermore, a spiral auger dehydration assembly j is provided below the centrifugal dehydration cylinder 1 for receiving the sludge that has been dehydrated once by the centrifugal dehydration cylinder 1. The spiral auger dehydration assembly j can adopt the existing structure to further dehydrate the sludge that has been dehydrated by the centrifugal dehydration cylinder 1, so that the dehydration is more complete and thorough, and after the aforementioned inclined water inlet sludge dehydration, the shape of the sludge is effectively rectified and the dehydration can be continuously performed, and then enters the spiral auger dehydration assembly j for dehydration, the sludge is not easily damaged, the force will be more balanced, the dehydration effect will be better, and this inclined sludge walking route can be operated uninterruptedly with higher efficiency.

[0031] Preferably, the inclined injection channel 3 includes at least one section of spiral coil 31, and the spiral coil 31 is inclined downward, the lower end of the spiral coil 31 is the sludge outlet and is inclined downward, the inclined injection channel 3 can be an integral section of spiral coil 31, or it can be an upper straight pipe connected to a lower spiral coil 31 or the two are inverted, but the overall preference is to incline downward, the most important thing is to ensure that the lower end of the spiral coil 31 is oriented in an inclined downward direction, which can also be understood as the direction of sludge discharge from the inclined injection channel 3. The design of the spiral coil 31 allows the sludge to have an initial velocity, and can optimize the shape of the sludge,

[0032] Furthermore, a smooth arc-shaped protrusion 311 is formed on the inner wall surface of the spiral coil 31, and the arc-shaped protrusion 311 is discretely distributed in the spiral coil 31, and the arc-shaped protrusion 311 is preferably distributed in a spiral shape along the pipe conveying path, which can optimize the shape of the sludge and can be effectively separated and re-deposited and integrated. The water outlet 30 is opened on the back slope of the arc-shaped protrusion 311, which can better merge with the sludge, follow the trend, and is conducive to loosening the sludge, while also reducing the risk of blockage.

[0033] Preferably, at least one arc-shaped protrusion 311 is equipped with an ultrasonic transducer 3111. This arrangement increases the activity of water, loosens and shapes the sludge better, and allows the sludge to gradually become a pile of relatively regular small sludge piles.

[0034] On this basis, further optimization is made. The arc-shaped protrusion 311 is hemispherical and the diameter size gradually decreases along the conveying path direction of the spiral coil 31. What is meant here is that the arc-shaped protrusion 311 is hemispherical and there are many of them in the spiral coil 31, and the sizes are different. That is, the closer the arc-shaped protrusion 311 is to the output port, the smaller the size will be. Because the sludge entering from the upper end of the inclined injection channel 3 is relatively messy and accumulated, it is more appropriate to shape and loosen it through large arc-shaped protrusions 311. With the addition of water and the action of the arc-shaped protrusions 311 along the way, the sludge will be shaped in an orderly manner and will become a more similar style of small sludge piles, so that the sludge is in a better dehydrated state. Furthermore, the diameter of the spiral coil 31 gradually decreases along the conveying path of the spiral coil 31, and the spiral coil 31 is in a conical spiral shape as a whole, which has a good shaping effect on the sludge. The conveying path is the route of the spiral coil 31 from the inlet on its upper side to the sludge outlet at the lower end, that is, the direction in which the tube itself extends downward, which further shapes the sludge and effectively outputs it to the centrifugal dehydration cylinder 1, and will form a better direction and initial velocity for centrifugal dehydration.

[0035] The arc-shaped protrusion 311 , the water outlet hole 30 and the ultrasonic transducer 3111 can also be arranged in the straight pipe section of the inclined injection channel 3 .

[0036] Preferably, an upper sealing end cap 11 and a lower sealing end cap 12 are respectively installed at the upper and lower ends of the centrifugal dehydration cylinder 1, and the centrifugal dehydration cylinder 1 can rotate around the upper sealing end cap 11 and the lower sealing end cap 12, and the upper sealing end cap 11 and the lower sealing end cap 12 are immovable and can be circular as a whole, and the upper sealing end cap 11 is provided with a sludge input port 110 connected to the lower end outlet of the spiral coil 31 for the sludge to enter the centrifugal dehydration cylinder 1, and the lower sealing end cap 12 is provided with a sludge output port 120, and the sludge output port 120 is connected with a guide pipe 121 that guides the sludge to the spiral auger dehydration assembly, and the output port of the guide pipe 121 is inclined downward. A reinforcing shaft 1112 can be connected between the central parts of the upper sealing end cap 11 and the lower sealing end cap 12, and the upper sealing end cap 11 and the lower sealing end cap 12 can be installed and fixed by existing hanging equipment or racks. The upper sealing end cover 11 and the centrifugal dehydration cylinder 1, as well as the lower sealing end cover 12 and the centrifugal dehydration cylinder 1, can be installed and connected through a slewing bearing, with a slewing bearing on the upper and lower sides, the inner ring of which is fixedly connected to the sealing end cover 11 and the lower sealing end cover 12, and the outer ring is fixedly connected to the centrifugal dehydration cylinder 1. Of course, a sealing ring is configured as much as possible on the upper and lower sides of each slewing bearing. Such sealing rings can be existing ones and are arranged between the upper sealing end cover 11 and the centrifugal dehydration cylinder 1 and between the lower sealing end cover 12 and the centrifugal dehydration cylinder 1. Existing sealing rings that do not affect or try not to affect the rotation can be used, generally O-rings. Of course, if the centrifugal dehydration cylinder 1 rotates, a driving structure q such as a driving wheel or a driving gear is required to drive. For example, a driving gear is used, and the driving gear is arranged on the periphery of the centrifugal dehydration cylinder 1. The periphery of the centrifugal dehydration cylinder 1 forms corresponding external teeth or directly fixes a ring gear to mesh with the driving gear. The driving gear is connected to the motor, and the motor can also be installed on a frame or a fixed building steel structure. In this way, the centrifugal dehydration cylinder 1 can be rotated, and the sealing end cover is kept motionless, so that the input and output of the sludge can be uninterrupted during the dehydration process, and continuous operation can be achieved. The effect of the guide pipe 121 is to transfer the sludge after the centrifugal dehydration cylinder 1 is dehydrated once to the spiral auger dehydration assembly. And the guide pipe 121 can also reduce the influence on the water collection after the centrifugal dehydration cylinder 1 is dehydrated. The guide pipe 121 can be slightly flat, and the angle with the ground is generally controlled between 15-45 degrees. The spiral auger dewatering component j can adopt the existing spiral auger dewatering equipment, such as the auger structure of a sludge dewatering device for water conservancy construction with application number 202022559813.8. The guide pipe 121 guides the sludge to the inlet of the spiral auger. The spiral blades in the auger push the sludge forward. The sludge is pressed toward the circumferential filter screen to filter water, and the dry sludge is pushed forward to the outlet and collected, and the filtered water here will also be collected.A switch valve or a spiral blade is preferably provided at the sludge output port 120, which can be used to control the start and stop of the sludge output and the output amount.

[0037] Furthermore, a circle of water filter layer 100 is tensionedly connected to the inner wall of the centrifugal dehydration cylinder 1, and a water outlet channel 101 that can be connected to the water filter layer 100 from the outside to the inside is provided on the centrifugal dehydration cylinder 1, and a bottom water storage tank 4 that can receive the water discharged from the water outlet channel 101 is provided below the fixed support cylinder 2. The water filter layer 100 can be made of dehydrated gauze or a filter net, and the water outlet channel 101 is close to the outside of the filter layer 100. An annular step groove h can be provided on the inner wall of the centrifugal dehydration cylinder 1, and the water filter layer 100 can be fixed on the inner side of the annular step groove and cover the annular step groove, while the water outlet channel 101 is connected to the annular step groove from the outside to the inside, so that the water after centrifugal sludge dehydration can enter the annular step groove and enter the water outlet channel 101, and the outlet of the water outlet channel 101 is facing the bottom water storage tank 4.

[0038] Preferably, the water outlet 30 is connected to a water inlet pipe 301, and a water flow sensor 302 is installed on the water inlet pipe 301. The water flow sensor 302 can measure the water inflow and is used to control the water inflow. Further, the water flow sensor 302 communicates with a controller wirelessly or wiredly, and the controller has a sludge dewatering optimization module. The controller can use an existing processor, that is, a CPU. The sludge dewatering optimization module is used to optimize the dewatering operation.

[0039] Furthermore, the sludge dewatering optimization module is optimized using a legacy algorithm, which determines an objective function Objective Function = w1*E-w2*C, where E is the dewatering efficiency, C is the energy consumption, and w1 and w2 are weight coefficients for balancing the effects of dewatering efficiency and energy consumption.

[0040] Specifically, genetic algorithms can be used to optimize multiple indicators in the sludge dewatering process, such as dewatering efficiency, energy consumption, processing costs, etc. In order to use genetic algorithms to calculate and optimize sludge dewatering, we first need to clarify the objective function and constraints of the problem. The above is a simple example that describes the objective function and related formulas for sludge dewatering. Assuming that we want to optimize the dewatering efficiency (E) and energy consumption (C) in the sludge dewatering process, we can define a comprehensive objective function to represent the overall performance of dewatering. The objective function is as mentioned above, E = (V in -V out ) / V in *100%, where V in is the water inflow, V outis the water output after dehydration, and C is the energy consumption, which can be obtained from experiments or historical data. Then the constraints are set, that is, in the optimization process, the following constraints may need to be considered: the maximum processing capacity of the dehydration equipment; the characteristics of the raw materials (sludge) (such as moisture content, solid content, etc.); environmental regulations or treatment standards (such as effluent water quality requirements). Next, the genetic algorithm is used for optimization. 1. Encoding: Encode the parameters to be optimized (such as dehydration time, pressing pressure, additive dosage, etc.) to form a chromosome representation of the individual. 2. Fitness function: Define the fitness function based on the previous objective function. The higher the fitness value, the better the individual (parameter combination). 3. Genetic operation: (1) Selection: Select individuals based on fitness. (2) Crossover: Generate new individuals. (3) Mutation: Randomly change certain individuals. (4) Iteration: Repeat the above process until the termination condition is met, such as reaching the maximum number of generations or fitness.

[0041] In this way, by collecting data from multiple groups of different sludge implementation cases, applying them to the genetic algorithm model and continuously updating it, more optimized dewatering operations can be performed for different types or weights of sludge, the control of water intake and energy consumption can be more optimized, and the beneficial sludge quality can be better protected.

[0042] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A sludge automatic dewatering system, characterized in that: The centrifugal dehydration cylinder (1) is provided with an inclined and rotatable centrifugal dehydration cylinder (1), wherein the centrifugal dehydration cylinder (1) is installed in an inclined fixed support cylinder (2), an inclined injection channel (3) is arranged outside the centrifugal dehydration cylinder (1) for injecting sludge into the centrifugal dehydration cylinder (1), a water outlet hole (30) is provided on the inner wall of the inclined injection channel (3) for discharging water, the inner wall of the inclined injection channel (3) is smooth, and a spiral auger dehydration assembly (j) is arranged below the centrifugal dehydration cylinder (1) for receiving sludge that has been dehydrated once by the centrifugal dehydration cylinder (1).

2. The sludge automatic dewatering system according to claim 1, characterized in that: The inclined injection channel (3) comprises at least one section of a spiral coil (31), and the spiral coil (31) is inclined downward, and the lower end of the spiral coil (31) is a sludge outlet and is inclined downward.

3. The sludge automatic dewatering system according to claim 2, characterized in that: A smooth arc-shaped protrusion (311) is formed on the inner wall surface of the spiral coil (31), and the water outlet hole (30) is opened on the back slope surface of the arc-shaped protrusion (311).

4. The sludge automatic dewatering system according to claim 3, characterized in that: An ultrasonic transducer (3111) is installed in at least one arc-shaped protrusion (311).

5. The automatic sludge dewatering system according to claim 3, characterized in that: The water outlet hole (30) is connected to a water inlet pipe (301), and a water flow sensor (302) is installed on the water inlet pipe (301).

6. The automatic sludge dewatering system according to claim 5, characterized in that: The water flow sensor (302) communicates with a controller via wireless or wired means, and the controller has a sludge dewatering optimization module.

7. The automatic sludge dewatering system according to claim 6, characterized in that: The sludge dewatering optimization module is optimized using a legacy algorithm, which determines an objective function ObjectiveFunction=w1*E-w2*C, where E is dewatering efficiency, C is energy consumption, and w1 and w2 are weight coefficients for balancing the effects of dewatering efficiency and energy consumption.

8. The sludge automatic dewatering system according to claim 3, characterized in that: The arc-shaped protrusion (311) is hemispherical and its diameter gradually decreases along the conveying path of the spiral coil (31); the diameter of the spiral coil (31) gradually decreases along the conveying path of the spiral coil (31); and the spiral coil (31) is in a conical spiral shape as a whole.

9. The automatic sludge dewatering system according to claim 1, characterized in that: An upper sealing end cover (11) and a lower sealing end cover (12) are respectively installed at the upper and lower ends of the centrifugal dehydration cylinder (1); the centrifugal dehydration cylinder (1) can rotate around the upper sealing end cover (11) and the lower sealing end cover (12); a sludge outlet (120) is provided on the lower sealing end cover (12); the sludge outlet (120) is connected to a guide pipe (121) for guiding the sludge to the spiral auger dehydration assembly; the outlet of the guide pipe (121) is inclined downward.

10. The sludge automatic dewatering system according to claim 9, characterized in that: A circle of water filter layer (100) is tensionedly connected to the inner wall of the centrifugal dehydration cylinder (1), a water outlet channel (101) capable of connecting to the water filter layer (100) from the outside to the inside is provided on the centrifugal dehydration cylinder (1), and a bottom water storage tank (4) capable of receiving water discharged from the water outlet channel (101) is provided below the fixed support cylinder (2).

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