Sludge treatment method of sludge treatment equipment

Abstract

The invention discloses a sludge treatment method of sludge treatment equipment, which comprises the following steps of: spirally rotating sludge along the axis of a roller, and gradually separating to separate mud and water; water enters the inner space of the roller through the water passing holes of the roller, the bottom of the roller is in butt joint with an external drainage pipe, the water in the roller is discharged along the drainage pipe, rotary rotation of the roller on sludge is achieved, eccentric separation of the sludge is achieved, and therefore spiral separation of the sludge is achieved. Therefore, the mud moves from the top space of the barrel to the bottom space of the barrel; when the mud reaches the bottom space of the cylinder body, the mud gradually moves along the central axis of the cylinder body under the guidance of the bottom space of the cylinder body, is gathered at the bottom mud discharge hole of the cylinder body and is discharged by a mud discharge pipe butted with the mud discharge hole, and the sludge forms mud in the separation process; mud is gradually gathered in the middle in multiple directions in the bottom space, so that the smoothness of the mud discharge hole is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment methods, and in particular to a sludge treatment method of sludge treatment equipment. Background Art

[0002] With the development of science and technology, sludge treatment equipment has been gradually applied in industry and people's lives. Sludge treatment equipment is a special equipment used to treat sludge generated during wastewater treatment. Its core goal is to reduce, stabilize, and harmlessly treat the sludge, and maximize its resource utilization. Sludge treatment equipment plays an important role in modern environmental protection projects and is widely used in urban sewage treatment plants, industrial wastewater treatment plants and other fields. In existing technologies, sludge is input into sludge treatment equipment and separated under the treatment of sludge treatment equipment. However, the sludge moves along a straight line and is separated during the movement. It cannot achieve spiral separation and cannot fully separate water and mud. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and the present invention provides a sludge treatment method of a sludge treatment equipment.

[0004] An embodiment of the present invention provides a sludge treatment method of a sludge treatment equipment, comprising: The sludge enters the cylinder of the sludge treatment equipment along the sludge conveying pipe and enters the internal space of the cylinder along the sludge conveying pipe of the cylinder; When the sludge enters the inner space of the cylinder, it contacts the roller inside the cylinder and rotates spirally under the drive of the roller. At this time, the sludge spirally rotates along the axis of the roller and is gradually separated to separate mud and water; The water enters the inner space of the drum through the water holes of the drum, and the bottom of the drum is connected to the external drainage pipe, and the water in the drum is discharged along the drainage pipe; The mud moves further downward under the drive of the drum and gradually approaches the bottom of the cylinder. At this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder. When the mud reaches the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder under the guidance of the bottom space of the cylinder, and gathers at the mud discharge hole at the bottom of the cylinder, and is discharged through the mud discharge pipe connected to the mud discharge hole.

[0005] Compared with the prior art, the present invention has the following beneficial effects: In the embodiment of the present application, by the method in the embodiment of the present application, the sludge enters the cylinder of the sludge treatment device along the sludge conveying pipe, and enters the internal space of the cylinder along the sludge conveying pipeline of the cylinder; when the sludge enters the internal space of the cylinder, the sludge contacts the roller in the cylinder and rotates spirally under the driving of the roller, at this time, the sludge rotates spirally along the axis of the roller and is gradually separated to separate the mud and the water; the water enters the internal space of the roller through the water passing hole of the roller, the bottom of the roller is connected to the external drain pipe, and the water in the roller is discharged along the drain pipe, which introduces the spiral rotation of the sludge and realizes the rotary rotation of the roller on the sludge, so as to realize the eccentric separation of the sludge, thereby realizing the spiral separation of the sludge and the full separation of the mud and the water, and fully utilizing the storage of the roller on the water.

[0006] Therefore, the mud is further moved downward under the driving of the roller and gradually approaches the bottom of the cylinder, at this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder; when the mud reaches the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder under the guidance of the bottom space of the cylinder and converges at the bottom mud discharge hole of the cylinder, and is discharged by the mud discharge pipe connected to the mud discharge hole, the mud forms mud during the separation process, the mud gradually moves towards the bottom space of the cylinder and converges in multiple directions in the bottom space, which ensures the smoothness of the mud discharge hole. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a flowchart of the sludge treatment method of the sludge treatment device in the embodiment of the present application; Figure 2 is a flowchart of step S11 in the sludge treatment method of the sludge treatment device in the embodiment of the present application; Figure 3 is a flowchart of step S12 in the sludge treatment method of the sludge treatment device in the embodiment of the present application; Figure 4 is a flowchart of step S13 in the sludge treatment method of the sludge treatment device in the embodiment of the present application; Figure 5 is a flowchart of step S14 in the sludge treatment method of the sludge treatment device in the embodiment of the present application; Figure 6 is a flowchart of step S15 in the sludge treatment method of the sludge treatment device in the embodiment of the present application. DETAILED DESCRIPTION

[0008] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0009] Please refer toFigures 1 to 6 A sludge treatment method of a sludge treatment device applied to a sludge treatment scene; the sludge treatment method of the sludge treatment device comprises: Step S11: The sludge enters the cylinder of the sludge treatment device along the sludge conveying pipe and enters the internal space of the cylinder along the sludge conveying pipeline of the cylinder; Step S12: When the sludge enters the internal space of the cylinder, the sludge contacts the roller in the cylinder and rotates spirally under the driving of the roller, at this time, the sludge rotates spirally along the axis of the roller and is gradually separated to separate the mud and water; Step S13: The water enters the internal space of the roller through the water hole of the roller, and the bottom of the roller is connected to the external drain pipe, and the water in the roller is drained along the drain pipe; Step S14: The mud further moves downward under the driving of the roller and gradually approaches the bottom of the cylinder, at this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder; Step S15: When the mud reaches the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder under the guidance of the bottom space of the cylinder and converges in the bottom mud discharge hole of the cylinder, and is discharged by the mud discharge pipe connected to the mud discharge hole.

[0010] Reference Figure 2 In step S11, the sludge enters the cylinder of the sludge treatment device along the sludge conveying pipe and enters the internal space of the cylinder along the sludge conveying pipeline of the cylinder; In the specific implementation process of the present application, the specific steps are: S111: The sludge treatment device is provided with a cylinder and a roller, the roller is in the cylinder and rotates along its own axis in the cylinder; a sludge space is formed between the inner side wall of the cylinder and the outer side wall of the roller, which is an annular space; the sludge enters the cylinder of the sludge treatment device along the sludge conveying pipe, and the sludge gradually moves towards the annular space and enters the internal space of the cylinder, at this time, the sludge is in a wet state; In the embodiment of the present application, the cylinder is the main part of the sludge treatment device, which is usually a cylindrical container for containing sludge and a roller. The roller is a rotatable cylindrical component installed in the cylinder, which functions to push the sludge to move in the cylinder by rotating. The sludge space is located between the inner side wall of the cylinder and the outer side wall of the roller, forming an annular channel called sludge space, which is the key area for sludge treatment and separation.

[0011] When the sludge enters the sludge treatment equipment, it is pumped into the cylinder of the sludge treatment equipment through a special pipe - the sludge pipe; the sludge entering the cylinder is usually in a wet state containing a large amount of water. The sludge in this state has good fluidity and is easy to move in the cylinder; after the sludge enters the cylinder, due to the action of gravity or other mechanical forces, it will gradually move toward the center of the cylinder until it enters the annular space between the cylinder and the drum; once entering the annular space, the sludge enters the main treatment area and is ready to be further separated and treated.

[0012] refer to Figure 3 In step S12, when the sludge enters the internal space of the cylinder, the sludge contacts the drum in the cylinder and rotates spirally driven by the drum. At this time, the sludge rotates spirally along the axis of the drum and is gradually separated to separate mud and water.

[0013] In the specific implementation process of the present invention, the specific steps are: S121: The sludge enters the inner space of the cylinder and contacts the outer wall of the drum. At this time, the drum generates a circular rotation force during its rotation. Driven by the circular rotation force, the sludge rotates along the annular space and gradually rotates from top to bottom to achieve spiral rotation. At the same time, the circular rotation force deflects the sludge at the point where it enters the annular space, preventing the sludge from directly impacting the outer wall of the drum. S122: The sludge rotates under the action of the drum and spirally rotates along the axis of the drum. At this time, the sludge is gradually separated under the spiral rotation, and the mud and water are gradually separated from the sludge. The water moves toward the outer wall of the roller under the force of the circular rotation and can enter the internal space of the drum to realize the collection of water by the drum.

[0014] In an embodiment of the present application, the sludge enters the internal space of the cylinder and contacts the outer wall of the drum. At this time, an annular rotation force is formed in the rotation process of the drum. The sludge rotates along the annular space driven by the annular rotation force and gradually rotates from top to bottom to realize spiral rotation. At the same time, the annular rotation force drives the sludge to deflect at the entrance of the sludge relative to the annular space to prevent the sludge from directly impacting the outer wall of the drum. At the same time, the annular rotation force drives the sludge to deflect at the entrance of the sludge relative to the annular space.

[0015] At this time, the sludge is transported to the top of the cylinder or the opening above the side by the sludge conveying pipe (described in step S11); once the sludge flows out of the sludge conveying pipe, it enters the annular internal space, i.e. the "sludge space", which is jointly surrounded by the cylinder shell and the drum shell; at this time, the sludge is a wet, flowing mud-like substance; the feeding position is usually designed at the top center or near the center of the annular space, so that the sludge can be evenly distributed in the upper part of the annular space.

[0016] Since the sludge is introduced into the annular space outside the drum, the particles and moisture of the sludge will inevitably contact the outer surface of the rotating drum; the outer wall of the drum is the key contact surface for driving the movement of the sludge; the surface properties of the outer wall of the drum (such as smoothness, whether there are small protrusions or special textures) will affect the friction and adhesion between the sludge and the drum, and then affect the subsequent rotation effect.

[0017] The drum is driven by a power source such as a motor and continuously rotates along its own axis; when the drum rotates, its outer wall will exert a tangential force on the sludge in contact with it, and this force propagates in the annular space, which is manifested as a force that pushes the sludge in the entire annular space to rotate around the drum (or the center axis of the cylinder), which is the "annular rotation force"; the size of this force is related to the rotation speed of the drum, the friction coefficient between the outer wall of the drum and the sludge, the viscosity of the sludge, etc.

[0018] Under the action of the above-mentioned annular rotation force, the sludge entering the annular space begins to rotate around the center axis of the cylinder; the sludge particles are driven by the drum and perform circular motion along the annular channel, which is the first step of sludge movement and the basis for subsequent spiral motion; rotation helps to evenly distribute the sludge and creates conditions for subsequent separation.

[0019] The sludge gradually rotates from top to bottom, forming a spiral motion. As the sludge rotates around the center of the drum, the rotation of the drum continuously pushes the sludge downward. As a result, the sludge's trajectory forms a spiral line, gradually moving downward from the top of the annular space to the bottom. This spiral motion is the core conveying mechanism that enables the sludge to be transported from the feed end to the sludge discharge end (bottom) within the equipment. When the sludge just enters the annular space from the sludge pipe, it has a certain initial momentum or a tendency to fall under the action of gravity; however, because the drum is already rotating, its outer wall immediately exerts an annular rotational force on the incoming sludge near the feed port. This force will quickly change the direction of movement of the sludge, deflect it, and quickly merge into the rotating flow of the annular space. This deflection effect is very important. It helps to smoothly introduce the feed sludge into the rotating flow instead of letting the sludge directly hit the drum or the inner wall of the cylinder, thereby reducing impact, wear and potential blockage risks; through the above-mentioned deflection effect, the newly entered sludge is effectively prevented from directly hitting the outer wall of the drum with a large impact force, which helps to protect the drum surface from damage and enables the sludge to be more smoothly and effectively drawn into the spiral motion.

[0020] Furthermore, the sludge rotates under the action of the drum and spirally rotates along the axis of the drum. At this time, the sludge is gradually separated under the spiral rotation, and the mud and water are gradually separated from the sludge. The water moves toward the outer wall of the roller under the action of the circular rotation force and can enter the internal space of the drum to realize the collection of water by the drum.

[0021] At this time, based on S121, the continuous rotation of the drum provides the main driving force; the sludge is continuously pushed by the outer wall of the drum, not only doing circular motion in the annular space, but also moving downward along the length direction (axis) of the drum. This kind of movement is spiral rotation; the rotation speed of the drum, the gap between the drum and the inner wall of the drum (the size of the annular space), and the physical properties of the sludge itself (such as viscosity, solid particle size and density) jointly determine the efficiency and form of the sludge spiral motion.

[0022] Optionally, the drum is usually not placed horizontally, but has a slight inclination angle (for example, a few degrees). This inclination angle causes the drum to generate a downward component force on the sludge along the length direction of the drum when it rotates; combined with the annular rotation force, the sludge forms a motion trajectory from top to bottom, spiraling around the central axis. This inclination angle is a key design parameter for controlling the sludge residence time and movement speed in the drum; if the angle is too small, the sludge moves too slowly, affecting the processing volume; if the angle is too large, the sludge moves too fast, the separation time is insufficient, and the separation effect is deteriorated.

[0023] As the sludge spiral moves downward, continuous friction, shearing and squeezing occur between the outer wall of the drum and the sludge, as well as between the various components inside the sludge. At the same time, the centrifugal force generated by the rotation of the drum acts on the sludge. The separation process is not completed instantaneously, but occurs gradually as the sludge moves inside the drum. Due to their high density, solid particles (mud) tend to move toward the outer wall under the action of centrifugal force and are further screened and pushed by the structure of the drum surface (if designed with specific textures or protrusions). Water is relatively easier to separate from the gaps between solid particles under the action of centrifugal force.

[0024] The centrifugal force generated by the rotation of the drum is the key driving force. For the free water and partially bound water in the sludge, the centrifugal force will "throw" them out from the solid particles with higher density and push them to the outer wall of the drum with lower density (because the drum itself is solid and provides a boundary). The magnitude of the centrifugal force is proportional to the square of the drum rotation speed. Therefore, appropriately increasing the drum speed can enhance the water separation effect, but this also requires consideration of excessive crushing of solid particles and increased energy consumption.

[0025] Moisture can enter the inner space of the drum, which means that the outer wall of the drum is not completely sealed, but is designed with water holes. When water is pushed to the outer wall of the drum by centrifugal force, it can pass through the water holes and enter the interior of the drum. The water holes of the drum are crucial. The size, shape, distribution density and opening rate of the water holes need to be carefully designed to ensure that water can pass through smoothly while preventing solid particles (mud) from entering the interior of the drum to avoid clogging and contamination of the collected water.

[0026] Once moisture enters the drum, the space inside acts as a collection channel. The drum is usually hollow or has a guide structure inside to collect the incoming moisture, which then flows through an outlet at one end of the drum and eventually flows into the drainpipe to be discharged from the equipment. The collection efficiency inside the drum also affects the overall performance. A well-designed internal flow channel can reduce secondary mixing or retention of moisture inside the drum.

[0027] refer to Figure 4 In step S13, the water enters the inner space of the drum through the water holes of the drum, and the bottom of the drum is connected to the external drainage pipe, and the water in the drum is discharged along the drainage pipe; In the specific implementation process of the present invention, the specific steps are: S131: The outer side wall of the drum is provided with water passing holes, and the water passing holes are arranged in multiple, and the multiple water passing holes are arranged in a ring shape along the drum and are arranged in a ring array along the up-down direction. Water is brought into contact with the outer side wall of the drum under the action of the ring rotating force, and flows downward along the outer side wall of the drum to enter the corresponding water passing hole. Alternatively, water directly enters the corresponding water passing hole under the action of the ring rotating force. At this time, the water passes through the water passing hole to enter the internal space of the drum and is gathered in the internal space of the drum. S132: The bottom of the drum is provided with a drain hole, which is communicated with a drain pipe outside, and the water in the drum flows towards the drain hole and gradually approaches the drain hole. The water in the drum is discharged along the drain pipe. At this time, each water enters the drum in different directions and is discharged towards the same drain hole.

[0028] In the embodiment of the present application, the outer side wall of the drum is provided with water passing holes, and the water passing holes are arranged in multiple, and the multiple water passing holes are arranged in a ring shape along the drum and are arranged in a ring array along the up-down direction. Water is brought into contact with the outer side wall of the drum under the action of the ring rotating force, and flows downward along the outer side wall of the drum to enter the corresponding water passing hole. Alternatively, water directly enters the corresponding water passing hole under the action of the ring rotating force. At this time, the water passes through the water passing hole to enter the internal space of the drum and is gathered in the internal space of the drum.

[0029] At this time, the outer wall of the drum is not completely closed, but is intentionally provided with multiple small holes, which are called "water passing holes". The existence of these holes is the key to realizing the separation of mud and water. Their design goal is to allow water (and small molecular substances dissolved in water) to pass through, while preventing solid particles (mud) in the sludge from entering the inside of the drum. The number of holes is usually large to ensure sufficient water passing area and uniform distribution of pressure.

[0030] The arrangement of these water passing holes is regular. In any cross section of the drum, the water passing holes are uniformly distributed along the circumferential direction, forming one or more ring arrangements (ring arrangements). At the same time, along the length direction (up-down direction) of the drum, the ring arrangement of water passing holes is arranged in layers, forming an array (ring array arrangement). This arrangement ensures that most of the area of the outer wall of the drum has water passing holes, so that water can have the opportunity to enter the inside of the drum at any position of the drum rotation, improving the efficiency and uniformity of water collection.

[0031] In step S122, after the water is separated, it is affected by the centrifugal force generated by the rotation of the drum (i.e., the "annular rotation force") in the annular space. This force causes the water to tend to move outward (i.e., the outer wall of the drum); therefore, the water will continuously impact or cling to the outer wall of the drum; after the water contacts the outer wall of the drum, there are two main ways for the water to enter the water holes: flowing along the wall: the water first forms a thin water film on the outer wall of the drum and flows downward along the drum wall (usually the drum is installed at an angle to promote the downward spiral movement of the sludge). When it encounters the water holes during the flow, it enters the interior of the drum through the water holes; directly entering: if the rotation speed of the drum is fast enough and the centrifugal force generated is very large, or the position and angle of the water holes are properly designed, the water will be directly "thrown" into the water holes by the strong centrifugal force the moment it contacts the outer wall of the drum, without having to flow along the wall. These two methods exist at the same time, depending on the specific equipment design parameters (such as drum speed, inclination angle, water hole design) and the properties of the sludge (such as water content and viscosity).

[0032] Regardless of the method, as long as the water successfully passes through the water holes, it is transferred from the annular space where the sludge is located to the internal space of the drum. This is a key separation step that realizes the physical separation of solid (mud) and liquid (water). The water that enters the drum, because the drum is usually closed or semi-closed and has a specific drainage structure at the bottom (to be described in S132), will form a collection area inside the drum, gradually accumulate, and wait for final discharge.

[0033] Furthermore, a drainage hole is provided at the bottom of the drum, which is connected to a drainage pipe outside. The water in the drum flows toward the drainage hole and gradually approaches the drainage hole. The water in the drum is discharged along the drainage pipe. At this time, each water enters the drum along a different direction and is discharged toward the same drainage hole, introducing a spiral rotation of the sludge and realizing a rotary rotation of the drum on the sludge, so as to realize eccentric separation of the sludge, thereby realizing spiral separation of the sludge, realizing full separation of mud and water, and making full use of the storage and discharge of water by the drum.

[0034] At this time, a drainage hole is provided at the bottom of the drum, which is connected to the external drainage pipe. When water enters the drum through the water hole on the outer wall of the drum, it will gather in the limited space inside the drum; since the drainage hole is located at the bottom, according to the action of gravity, the water inside the drum will naturally flow downward and gather at the lowest point of the drum, which is near the drainage hole. This process is continuous. As more water seeps in from the outer wall, the internal water level will gradually rise, pushing the existing water closer to the drainage hole; when the water gathers near the drainage hole, it will flow out through the drainage hole, and the water in the drum will be discharged along the drainage pipe.

[0035] The water entering the inside of the drum does not come from one point, but from a plurality of water passing holes distributed at different positions (different heights, different circumferential angles) on the outer wall of the drum (each water enters the inside of the drum along a different direction); however, no matter which water passing hole the water initially enters from, once it enters the inside of the drum, it will move to the lowest point under the action of gravity and be discharged from the device through the only (or main) drainage hole (discharged towards the same drainage hole), which ensures that the collected water can be effectively guided out.

[0036] Reference Figure 5 In step S14, the sludge is further moved downward by the drum and gradually approaches the bottom of the cylinder, at this time, the sludge is moved from the top space of the cylinder to the bottom space of the cylinder; In the specific implementation process of the present application, the specific steps are as follows: S141: The drum is in the cylinder and rotates along the axis of the drum, and the drum is in a continuous rotating state; the sludge continuously receives the annular rotating force of the drum during the descending process and gradually accelerates the descending process; S142: The sludge descends towards the bottom of the cylinder and gradually approaches the bottom of the cylinder, so as to gather the sludge in the bottom of the cylinder, at this time, the sludge is moved from the top space of the cylinder to the bottom space of the cylinder.

[0037] In the embodiment of the present application, the drum is in the cylinder and rotates along the axis of the drum, and the drum is in a continuous rotating state; the sludge continuously receives the annular rotating force of the drum during the descending process and gradually accelerates the descending process.

[0038] At this time, the drum is the core component, which is completely contained in the larger cylinder; the rotating axis of the drum is fixed, and the drum rotates around this axis; most importantly, this rotation is not temporary, but "continuous", which means that the drum is driven by a power system (such as a motor) to maintain a relatively stable and uninterrupted rotating speed, providing a continuous power source and motion environment required for sludge treatment process; the continuous rotation of the drum is the basis for all subsequent dynamic processes (such as the spiral motion of sludge, sludge-water separation).

[0039] Mud refers to the relatively solidified solid part of sludge after preliminary separation; when the mud moves downward in the annular space (affected by gravity, drum push, etc.), it always maintains contact with or a very close distance to the outer wall of the drum; the rotation of the drum will transfer rotational energy to the mud through friction, shear force, etc. This way of transferring energy can be understood as a "circular rotational force". This force acts "continuously" because the drum rotates continuously. This force is the key to driving the mud movement; it not only maintains the rotational motion of the mud, but more importantly, it provides the force to push the mud downward along the axis of the drum and affect its movement speed.

[0040] Under the combined effect of the drum's "circular rotation force" and its own "gravity", the mud's descending speed is not constant as it moves downward, but increases "gradually", that is, it descends at an accelerated rate. This "gradual" means that the acceleration is changing, but the overall trend is that the speed is getting faster and faster; accelerated descent helps to improve processing efficiency; the mud passes through the equipment faster, which can increase the processing volume per unit time; at the same time, continuous acceleration also helps to further squeeze the mud and promote the separation of more water.

[0041] Furthermore, the mud descends toward the bottom of the cylinder and gradually approaches the bottom of the cylinder so that the mud gathers at the bottom of the cylinder. At this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder, realizing the movement of the mud from the top space of the cylinder to the bottom space of the cylinder.

[0042] At this time, the mud descends toward the bottom of the cylinder. The mud will overcome its own viscosity, internal resistance and friction with the inner wall of the cylinder and begin to move downward. This "descent" is not only in the vertical direction, but also in an oblique or spiral downward movement along the inner wall of the drum or some kind of diversion structure. The main forces driving this descent include: the thrust / shear force generated by the rotation of the drum, gravity and the existing pressure gradient (if there is a pressure change inside the drum). This is a key step in the movement of mud from the treatment area to the final collection area, ensuring that the treated solid products can leave the drum area and make room for new sludge to enter.

[0043] The mud gradually approaches the bottom of the cylinder. This "gradual approach" process is continuous, not abrupt. As the mud is continuously pushed downward, the spatial position it occupies relative to the vertical distance or shortest distance to the bottom of the cylinder continues to decrease. This process describes the gradual movement of the mud towards the final convergence point, ensuring that the mud can reach the bottom smoothly and orderly, rather than instantly accumulating or splashing.

[0044] The mud gathers at the bottom of the cylinder. This gathering process is caused by the mud constantly reaching the bottom and accumulating and accumulating in the bottom area. Design considerations (such as the bottom shape, whether there is stirring to prevent compaction, etc.) will affect the efficiency of the gathering and the shape of the final mud cake. Convergence is one of the ultimate goals of solid-liquid separation, which is to concentrate the separated solids in one place to facilitate subsequent discharge, treatment (such as dehydration, drying) or transportation. The mud completes the transition from the upper area to the lower area of ​​the equipment. This "movement" is a macro description, covering the entire process of "descending" and "approaching the bottom" mentioned earlier. It indicates that there is a clear material flow direction inside the equipment, from the feed end (top) to the discharge end (bottom); it confirms the integrity of the material circulation or treatment process inside the equipment, that is, the solid product can be smoothly moved from the treatment area to the collection area.

[0045] refer to Figure 6 In step S15, when the mud reaches the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder under the guidance of the bottom space of the cylinder, and gathers at the mud discharge hole at the bottom of the cylinder, and is discharged through the mud discharge pipe connected to the mud discharge hole; In the specific implementation process of the present invention, the specific steps are: S151: Mud gradually enters the bottom space of the cylinder and gathers in the bottom space of the cylinder. At this time, the bottom space of the cylinder serves as a conical space, the mud discharge hole is located in the middle of the conical space, and the conical space converges to the mud discharge hole along the annular direction; S152: The mud gradually moves along the central axis of the cylinder under the guidance of the bottom space of the cylinder. At this time, the direction of the central axis of the cylinder coincides with the axial direction of the mud discharge hole at the bottom of the cylinder. The mud gathers at the mud discharge hole at the bottom of the cylinder and is discharged through the mud discharge pipe connected to the mud discharge hole.

[0046] In an embodiment of the present application, the mud gradually enters the bottom space of the cylinder and converges in the bottom space of the cylinder. At this time, the bottom space of the cylinder serves as a conical space, the mud discharge hole is in the middle position of the conical space, and the conical space converges to the mud discharge hole along the annular direction.

[0047] At this point, after the descending process of step S14, the mud (a mixture of solid particles and some water) has reached the lowest area of ​​the cylinder. The "bottom space" here refers to the lowest part of the cylinder structure. Due to the action of gravity, the mud will naturally move downward and eventually stay at the bottom of the cylinder. This "gradual entry" process means that the mud does not arrive instantly, but continues to enter this bottom area as the previous step is completed.

[0048] Once the mud enters the bottom space, due to the continuous action of gravity and subsequent slight disturbances or extrusion (depending on the specific equipment design), the mud will gather in this area to form a certain accumulation. This "convergence" is the result of the natural sedimentation and accumulation of solid matter in the gravitational field; the "bottom space" is designed as a specific "conical space", which means that the shape of the bottom of the cylinder is not flat, but a cone that gradually shrinks toward the center (usually an inverted cone). This design is not random, but is intended to guide the flow and convergence of the mud; the conical structure provides a physical guiding path; the upper opening of a conical space is large and the lower outlet is small, forming a cone; the bottom space of the funnel is a conical space.

[0049] At the bottom center of this conical space, there is a "mud discharge hole", which is the channel for the mud to finally be discharged from the equipment; the mud discharge hole is set in the middle of the conical space in order to use the conical structure to guide the mud from all sides to this central outlet; the small hole at the bottom of the funnel is the mud discharge hole; it is located in the center of the conical bottom space of the funnel; "annular direction" refers to the circumferential direction around the central axis of the cylinder. This sentence means that the inner wall surface of the conical space is gradually inclined inward in the annular direction, so that the mud entering the conical space from near the wall of the cylinder will slide along the inclined wall toward the central axis, and finally converge at the mud discharge hole located in the center; the conical structure plays a role in collecting and concentrating mud.

[0050] Furthermore, the mud is guided by the bottom space of the cylinder and gradually moves along the direction of the central axis of the cylinder. At this time, the direction of the central axis of the cylinder coincides with the axial direction of the mud discharge hole at the bottom of the cylinder. The mud gathers at the mud discharge hole at the bottom of the cylinder and is discharged through the mud discharge pipe connected to the mud discharge hole. At the same time, the sludge forms mud during the separation process, and the mud gradually moves toward the bottom space of the cylinder and converges in the center in multiple directions in the bottom space, ensuring the smoothness of the mud discharge hole.

[0051] At this time, the bottom space of the cylinder is designed to be conical, and its inner wall surface plays a guiding role; when the mud enters this conical space, due to the constraint of the conical wall and the action of gravity, the mud will move along the wall to the center. This "convergence along the four sides" refers to the convergence from the annular area of ​​the conical space to the center; "the direction of the central axis of the cylinder" refers to the direction indicated by the imaginary straight line in the center of the equipment cylinder; therefore, the direction of the mud's movement is from the four walls of the conical space to the central axis.

[0052] The "central axis" of the cylinder is the main symmetry axis of the equipment; the "mud discharge hole" is located in the center of the conical space at the bottom; the "axial direction" of the mud discharge hole refers to the straight line that is perpendicular to the mud discharge hole and points to the extension direction of the mud discharge pipe; in design, the "axial direction" of this mud discharge hole must completely coincide with the central axis of the cylinder, which means that the mud discharge hole is directly aimed at the center of the cylinder, and when the mud moves along the central axis, it will be aligned with the mud discharge hole.

[0053] Due to the guidance of the conical space and the design of the mud discharge hole aligned with the central axis, the mud will become more and more concentrated during the movement and eventually gather at the entrance of the mud discharge hole; the size and shape of the mud discharge hole will affect the shape of the mud gathering and the discharge speed; the mud discharge hole is not directly exposed to the outside of the equipment, but is connected to the outside through a pipe (mud discharge pipe); the mud discharge hole and the mud discharge pipe are tightly connected to form a continuous channel; when the mud gathers in the mud discharge hole, it will be guided out of the equipment body through this channel.

[0054] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A sludge treatment method for a sludge treatment equipment, characterized in that: include: The sludge enters the cylinder of the sludge treatment equipment along the sludge conveying pipe and enters the internal space of the cylinder along the sludge conveying pipe of the cylinder; When the sludge enters the inner space of the cylinder, it contacts the roller inside the cylinder and rotates spirally under the drive of the roller. At this time, the sludge spirally rotates along the axis of the roller and is gradually separated to separate mud and water; The water enters the inner space of the drum through the water holes of the drum, and the bottom of the drum is connected to the external drainage pipe, and the water in the drum is discharged along the drainage pipe; The mud moves further downward under the drive of the drum and gradually approaches the bottom of the cylinder. At this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder. When the mud reaches the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder under the guidance of the bottom space of the cylinder, and gathers at the mud discharge hole at the bottom of the cylinder, and is discharged through the mud discharge pipe connected to the mud discharge hole.

2. The sludge treatment method of the sludge treatment equipment according to claim 1, characterized in that: The sludge enters the cylinder of the sludge treatment equipment along the sludge conveying pipe and enters the internal space of the cylinder along the sludge conveying pipe of the cylinder, including: The sludge treatment equipment is provided with a cylinder and a drum. The drum is located in the cylinder and rotates along its own axis in the cylinder. A sludge space is formed between the inner wall of the cylinder and the outer wall of the drum. The sludge space is annular. The sludge enters the cylinder of the sludge treatment equipment along the sludge pipe, gradually moves toward the annular space, and enters the internal space of the cylinder. At this time, the sludge is in a wet state.

3. The sludge treatment method of the sludge treatment equipment according to claim 2, characterized in that: When the sludge enters the inner space of the cylinder, the sludge contacts the drum inside the cylinder and is driven by the drum to perform a spiral rotation. At this time, the sludge spirally rotates along the axis of the drum and is gradually separated to separate mud and water, including: The sludge enters the internal space of the cylinder and contacts the outer wall of the drum. At this time, an annular rotation force is generated during the rotation of the drum. Driven by the annular rotation force, the sludge rotates along the annular space and gradually rotates from top to bottom to achieve spiral rotation. At the same time, the annular rotation force drives the sludge to deflect at the entrance of the sludge relative to the annular space, preventing the sludge from directly impacting the outer wall of the drum.

4. The sludge treatment method of the sludge treatment equipment according to claim 3, characterized in that: When the sludge enters the inner space of the cylinder, the sludge contacts the drum in the cylinder and is driven by the drum to perform spiral rotation. At this time, the sludge spirally rotates along the axis of the drum and is gradually separated to separate mud and water. The method also includes: The sludge rotates under the action of the drum and spirally rotates along the axis of the drum. At this time, the sludge is gradually separated under the spiral rotation, and the mud and water are gradually separated from the sludge. The water moves toward the outer wall of the roller under the action of the circular rotation force and can enter the internal space of the drum to realize the collection of water by the drum.

5. The sludge treatment method of the sludge treatment equipment according to claim 4, characterized in that: The water enters the inner space of the drum through the water hole of the drum, and the bottom of the drum is connected to the external drainage pipe, and the water in the drum is discharged along the drainage pipe, including: The outer wall of the drum is provided with water holes, and there are multiple water holes. The multiple water holes are arranged in a ring along the drum and in a ring array along the up and down directions; the water contacts the outer wall of the drum under the drive of the annular rotation force and flows downward along the outer wall of the drum to enter the corresponding water holes; or, the water directly enters the corresponding water holes under the drive of the annular rotation force; at this time, the water enters the internal space of the drum through the water holes and gathers in the internal space of the drum.

6. The sludge treatment method of the sludge treatment equipment according to claim 5, characterized in that: The water enters the inner space of the drum through the water hole of the drum, the bottom of the drum is connected to the external drainage pipe, and the water in the drum is discharged along the drainage pipe, further comprising: There is a drainage hole at the bottom of the drum, which is connected to the external drainage pipe. The water in the drum flows toward the drainage hole and gradually approaches the drainage hole. The water in the drum is discharged along the drainage pipe. At this time, each water enters the drum along different directions and is discharged toward the same drainage hole.

7. The sludge treatment method of the sludge treatment equipment according to claim 6, characterized in that: The mud further moves downward under the drive of the drum and gradually approaches the bottom of the cylinder. At this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder, including: The drum is inside the cylinder and rotates along its axis. The drum is in a state of continuous rotation. The mud is continuously subjected to the circular rotation force of the drum during its descent and gradually accelerates its descent.

8. The sludge treatment method of the sludge treatment equipment according to claim 7, characterized in that: The mud further moves downward under the drive of the drum and gradually approaches the bottom of the cylinder. At this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder, and further includes: The mud descends toward the bottom of the cylinder and gradually approaches the bottom of the cylinder so that the mud gathers at the bottom of the cylinder. At this time, the mud moves from the top space of the cylinder to the bottom space of the cylinder.

9. The sludge treatment method of the sludge treatment equipment according to claim 1, characterized in that: When the mud reaches the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder under the guidance of the bottom space of the cylinder, and gathers at the mud discharge hole at the bottom of the cylinder, and is discharged through the mud discharge pipe connected to the mud discharge hole, including: The mud gradually enters the bottom space of the cylinder and gathers in the bottom space of the cylinder. At this time, the bottom space of the cylinder serves as a conical space, the mud discharge hole is in the middle position of the conical space, and the conical space converges to the mud discharge hole along the annular direction.

10. The sludge treatment method of the sludge treatment equipment according to claim 9, characterized in that: When the mud reaches the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder under the guidance of the bottom space of the cylinder, and gathers at the mud discharge hole at the bottom of the cylinder, and is discharged through the mud discharge pipe connected to the mud discharge hole, and further includes: Guided by the bottom space of the cylinder, the mud gradually moves along the direction of the central axis of the cylinder. At this time, the direction of the central axis of the cylinder coincides with the axial direction of the mud discharge hole at the bottom of the cylinder. The mud gathers at the mud discharge hole at the bottom of the cylinder and is discharged through the mud discharge pipe connected to the mud discharge hole.

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