An integrated processing system for full resource utilization and zero discharge of engineering slurry

Abstract

This invention relates to the field of waste mud recycling technology, specifically to an integrated treatment system for the complete resource utilization and zero discharge of engineering mud, comprising a crushing and screening zone, a slurry conditioning zone, a sand-water separation zone, a mud-water concentration zone, and a filter press dewatering zone connected in sequence; the crushing and screening zone is equipped with a crusher, a conveyor belt, and a screening machine for separating coarse aggregates and outputting a mud-sand-water mixture; the slurry conditioning zone is equipped with a slurry mixer for adding water to the mud-sand-water mixture and stirring it into a uniform mud slurry; the sand-water separation zone is equipped with a washing machine and a dewatering screen; the mud-water concentration zone is equipped with a mud tank and at least two sets of concentration tanks for separating the mud-water mixture into a supernatant and a concentrated mud slurry; the filter press dewatering zone is equipped with a filter press for pressing the concentrated mud slurry into mud cakes and discharging the filtrate, realizing the complete resource utilization of sand, stone, mud, and water, and achieving the green construction goal of "zero discharge and zero waste".

Description

Technical Field

[0001] This invention relates to the field of waste mud recycling technology, specifically to an integrated treatment system for the complete resource utilization and zero discharge of engineering mud. Background Technology

[0002] In the construction of pile foundations for bridges, buildings, and other engineering projects, the generation of large amounts of engineering mud is unavoidable, especially in the construction stage of large-diameter bored piles. The mud is mainly used for wall protection, slag carrying, and cooling the drill bit. Traditional disposal methods typically involve on-site excavation of sedimentation tanks for natural drying or off-site disposal. However, these methods have significant drawbacks: firstly, natural drying is time-consuming and requires a large area, and the mud is prone to leakage or overflow during the drying process, causing serious pollution to the surrounding soil and water bodies; secondly, off-site disposal not only incurs high transportation and storage costs but also poses environmental risks due to illegal dumping. While some projects have attempted to introduce mechanical dewatering equipment, it is mostly single-machine operation, lacking a systematic process flow design. Furthermore, it is difficult to dewater during pressure filtration, resulting in low mud treatment efficiency. In addition, uncast concrete residue is often directly landfilled as construction waste, wasting valuable resources such as sand, gravel, and cement, further exacerbating the environmental burden. This fails to achieve full-component resource utilization of sand, stone, mud, and water, and there is still a significant gap from the green construction goal of "zero emissions and zero waste."

[0003] Therefore, the inventors propose an integrated treatment system for the complete resource recovery and zero discharge of engineering mud to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated treatment system for the complete resource utilization and zero discharge of engineering mud, aiming to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: An integrated treatment system for zero-discharge full-resource utilization of engineering mud includes a crushing and screening zone, a slurry conditioning zone, a sand-water separation zone, a mud-water concentration zone, and a filter press dewatering zone connected in sequence. The crushing and screening zone is equipped with a crusher, conveyor belt, and integrated screening machine for separating coarse aggregates and outputting a mud-sand-water mixture. The slurry conditioning zone is equipped with a slurry mixer for adding water to the mud-sand-water mixture and stirring it into a uniform slurry. The sand-water separation zone is equipped with a wheel washer and a dewatering screen for separating fine aggregates from the slurry and outputting a mud-water mixture. The mud-water concentration zone is equipped with a slurry tank and at least two integrated concentration tanks for separating the mud-water mixture into supernatant and concentrated slurry. The filter press dewatering zone is equipped with a filter press for pressing the concentrated slurry into slurry cakes and discharging the filtrate. It also includes a clear water tank. The filtrate outlet of the filter press and the outlet of the integrated concentration tank are both connected to the clear water tank. The water outlet of the clear water tank is connected to the pulping machine and the washing machine, respectively, forming a closed-loop water supply.

[0006] Furthermore, the crusher is used to crush the material to a particle size of less than 20 mm, the integrated screening machine separates coarse aggregate with a particle size of greater than or equal to 5 mm, and the fine aggregate has a fineness modulus of 2.4 to 2.8 and a mud content of less than 5%.

[0007] Furthermore, the filter press includes a body, a filter plate assembly, a drive unit, and at least one vibration component, wherein the filter plate assembly, the vibration component, and the drive unit are mounted on the body; The filter press assembly includes multiple interconnected filter presses, and the driving unit is connected to one of the filter presses. The driving unit can drive adjacent filter presses to move closer to or further away from each other. The vibration assembly includes a vibration unit and a piston unit. A demolding airbag is provided on the filter press plate. The piston unit is connected to the demolding airbag. The vibration unit is connected to the drive unit. When the drive unit drives each of the filter press plates to move away from each other, the vibration unit applies vibration to each of the filter press plates while the piston unit inflates the demolding airbag.

[0008] Furthermore, the vibration unit includes a mounting base and a plurality of vibrating elements, each of the vibrating elements being mounted on the mounting base and arranged at intervals along the length direction of the mounting base; The vibrating component includes a mounting shaft and a rotating shaft with their axes perpendicular to each other. The mounting shaft is rotatably mounted on the mounting base. One end of the mounting shaft is coaxially fixedly connected to a gear, and the other end of the mounting shaft is coaxially fixedly connected to a driving bevel gear. A driven bevel gear is coaxially fixedly connected to the rotating shaft, and the driving bevel gear and the driven bevel gear mesh with each other. A cam portion is provided between two adjacent rotating shafts. The cam portion includes two mounting blocks, which are respectively fixedly mounted on the ends of the two rotating shafts. A connecting shaft is eccentrically connected between the two mounting blocks, and a contact cylinder is sleeved on the connecting shaft. A contact strip is mounted above the filter press plate. When the rotating shaft rotates, it causes the contact cylinder to periodically strike the contact strip.

[0009] Furthermore, the piston unit includes a plurality of piston cylinders fixedly mounted on the mounting base, a piston chamber is formed inside the piston cylinder, a piston ring is slidably connected in a sealed manner inside the piston chamber, a push rod is hinged to the piston ring, and the push rod is hinged to the contact cylinder; The piston cylinder has a first circular hole and a second circular hole that communicate with the piston chamber. A first one-way valve is provided at the first circular hole, and a second one-way valve is provided at the second circular hole. A pipe is connected to the second circular hole, and the pipe communicates with the demolding airbag. The drive unit includes a hydraulic cylinder fixedly mounted on the machine body, and a push-pull plate is connected to the piston end of the hydraulic cylinder. The push-pull plate is connected to one of the filter plates. A rack is fixedly installed on the top of the push-pull plate, and the rack meshes with each of the gears.

[0010] Furthermore, the filter press assembly includes a fixed plate and a connecting unit. Multiple filter presses are disposed on one side of the fixed plate, and each filter press is movably connected to the fixed plate through the connecting unit, so that each filter press can switch between a vertical posture and an inclined posture relative to the fixed plate; each filter press has a first state and a second state. When the driving unit drives each of the filter plates to approach each other to form a first state, each of the filter plates switches to a vertical posture and the filter surface of each of the filter plates is at the maximum effective filtration area. When the driving unit drives each of the filter plates to move away from each other to form a second state, each of the filter plates switches to an inclined posture, the distance between adjacent filter plates increases, and the filter surface of each filter plate is inclined relative to the vertical direction.

[0011] Furthermore, the connecting unit includes multiple cross frames and cross rods, the cross frames are hinged to the cross rods, each cross frame is mounted on a corresponding filter press plate, and adjacent cross frames are hinged to each other; The crossbar includes a first connecting rod and a second connecting rod, wherein the first end of the first connecting rod and the first end of the second connecting rod are hinged together at the same hinge point on the fixed plate; The cross frame includes a third connecting rod and a fourth connecting rod, which are arranged in a cross configuration. The cross position of the third connecting rod and the fourth connecting rod is hinged to the corresponding filter plate. The second end of the first connecting rod is hinged to the first end of the third connecting rod, and the second end of the second connecting rod is hinged to the first end of the fourth connecting rod. The second end of the third connecting rod is hinged to the first end of the fourth connecting rod on the adjacent cross frame, and the second end of the fourth connecting rod is hinged to the first end of the third connecting rod on the adjacent cross frame.

[0012] Furthermore, the filter press includes a sliding table, a first filter plate, and a second filter plate. An mounting plate is fixedly installed on the sliding table. One end of the mounting plate is hinged to the first filter plate, and the other end of the mounting plate is hinged to the second filter plate. The first filter plate and the second filter plate are arranged parallel to each other. Demolding airbags are disposed on the sliding platform; A first rod and several parallel second rods are provided between the first filter plate and the second filter plate. A connecting post is provided at the middle position of the mounting plate. The connecting post is hinged to the first rod. One end of the second rod is hinged to the first filter plate, and the other end of the second rod is hinged to the second filter plate. The intersection of the third connecting rod and the fourth connecting rod is hinged to the connecting post.

[0013] Furthermore, it also includes a drive rod, one end of which is hinged to the second end of the second connecting rod, and the other end of which is hinged to one of the second rod bodies; The first filter plate and the second filter plate have the same structure; The first filter plate includes a plurality of filter plate bodies, which are hinged to each other, wherein the filter plate body located at the end face is hinged to the mounting plate.

[0014] Furthermore, the filter plate body includes a first plate body and a second plate body, wherein a pressure chamber is formed in the first plate body, and the second plate body is slidably connected in a sealed manner within the pressure chamber; The first plate has several exhaust holes, which are connected to the air pressure chamber. Each exhaust hole is provided with a first one-way valve diaphragm. The first plate has an air inlet that communicates with the air pressure chamber, and the air inlet is provided with a second one-way valve diaphragm that only allows gas to enter the air pressure chamber; It also includes an air intake pipe, which is connected to several branch air pipes, each of which is connected to a corresponding air intake hole.

[0015] The beneficial effects of this invention are: Other advantages, objectives, and features of this application will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from practice of this application. The objectives and other advantages of this application may be realized and obtained through the detailed embodiments described below. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the partitioned process of the waste mud recycling device of the present invention; Figure 2This is a detailed process diagram of the waste mud recycling device of the present invention; Figure 3 This is a schematic diagram of the overall structure of the filter press in the waste mud recycling device of the present invention; Figure 4 for Figure 3 A partial structural diagram; Figure 5 This is a schematic diagram of the structure of the vibration unit in the waste mud recycling device of the present invention; Figure 6 for Figure 5 A schematic diagram of the partially split structure; Figure 7 This is a schematic diagram of the filter press plate in the waste mud recycling device of the present invention; Figure 8 This is a cross-sectional schematic diagram of the sliding table in the waste mud recycling device of the present invention. Figure 9 This is a side view of the filter plate assembly in the first state of the waste mud recycling device of the present invention. Figure 10 In the waste mud recycling device of the present invention Figure 8 A partial structural diagram; Figure 11 This is a side view of the filter press assembly of the present invention in the second state; Figure 12 This is a frontal structural diagram of the filter press assembly of the present invention in its first state; Figure 13 This is a schematic diagram of the overall structure of the filter plate body in this invention; Figure 14 This is a cross-sectional schematic diagram of the filter plate body in this invention; Figure 15 for Figure 7 A schematic diagram of the cross-sectional structure; Figure 16 for Figure 15 A magnified structural diagram of part A. Detailed Implementation

[0017] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] This embodiment proposes an integrated treatment system for the complete resource utilization and zero discharge of engineering mud, such as... Figures 1 to 16 As shown, it includes a crushing and screening zone, a slurry conditioning zone, a sand-water separation zone, a mud-water concentration zone, and a filter press dewatering zone connected in sequence; the crushing and screening zone is equipped with a crusher, a conveyor belt, and an integrated screening machine; the crusher crushes and disperses the engineering mud and uncast concrete residue recovered on site, so as to refine the mud particles and crush the material to a particle size of less than 20mm.

[0020] The system also includes a conveyor belt to transport materials to the integrated screening machine, separating coarse aggregate (pebbles) from a mixture of mud, sand, and water. The coarse aggregate has a particle size greater than 5mm and can be directly used for concrete production or temporary road base. The slurry conditioning zone is equipped with a slurry mixer, where the crushed material is mixed with water to form a uniform slurry, creating conditions for subsequent fine separation. The sand-water separation zone includes a washing machine and a dewatering screen. The washing machine agitates and washes the screened mud, sand, and water mixture, further separating the sand from the slurry; the dewatering screen dewaters the output of the washing machine, producing fine aggregate (sand) and a mud-water mixture. The fine aggregate has a fineness modulus of 2.4~2.8 and a mud content of less than 5%, suitable for mortar preparation and temporary site hardening. The mud-water concentration zone includes a mud tank; in this embodiment, the mud tank is preferably 200 square meters in volume, and includes one integrated concentration tank. The mud tank temporarily stores the mud and water separated by the dewatering screen, and the integrated thickening tank separates the clear water from the concentrated mud through gravity sedimentation. It also includes one clear water tank (300m³). 3 The filter press dewatering zone is equipped with a filter press, which presses the concentrated slurry to form a slurry cake (moisture content ≤35%) and clear water. The clear water is stored in a clear water tank and recycled for processes such as pulping and washing, realizing the closed-loop utilization of water resources and forming a water use closed loop. In this embodiment, the equipment and machines involved in the crushing and screening zone, pulping and conditioning zone, sand and water separation zone, mud and water concentration zone and filter press dewatering zone are existing equipment well known to those skilled in the art.

[0021] In this embodiment, by setting up a crushing and screening zone, a pulp conditioning zone, a sand-water separation zone, a mud-water concentration zone, and a filter press dewatering zone, the mud can be converted into four types of reusable products, achieving full resource utilization. Specific indicators and applications are shown in the table below: Note: Production volume varies depending on the composition of the mud source; the above is the average value under design conditions.

[0022] This system reduces mud discharge at the source, transforming construction waste into usable resources. Self-produced sand, gravel, mud cake, and recycled water are directly used for engineering construction and ecological restoration, significantly reducing raw material procurement and waste transportation costs. It eliminates the indiscriminate discharge of mud that pollutes water and soil, reduces energy consumption in the mining and transportation of natural sand and gravel, thus reducing carbon emissions. Furthermore, it can be promoted in subsequent highway and railway projects, driving the green transformation of the construction industry.

[0023] It should be noted that while traditional technical solutions also incorporate mechanical dewatering equipment, these are mostly stand-alone operations lacking a systematic process flow design. Furthermore, material removal is inconvenient during filter press treatment. In traditional filter presses, the opening of the filter plates 2 typically relies solely on a mechanical pulling mechanism to separate adjacent plates. While this simple linear pulling structure achieves basic cake removal, the strong adhesion between the cake and the filter plates 2 (or the filter cloth covering them) makes it difficult for the cake to detach completely under gravity alone in actual production. The high pressure applied during filtration causes the cake to be densely pressed onto the surface of the filter plates 2. Combined with the surface tension from the sticky components of the soil or residual moisture, this creates an adhesion force far exceeding the cake's own weight, resulting in a "cake-hanging" phenomenon. This significantly reduces filtration efficiency and artificially lengthens the filtration cycle. To address this issue, on-site operators often need to frequently use tools such as shovels and high-pressure water guns for manual cleaning. This not only increases the labor intensity of the operators but also prolongs the auxiliary time between two filtrations, forcing the interruption of the originally continuously operating filter press process. Especially for sludge dewatering or slurry filtration scenarios with large processing volumes and high concentrations, the frequency of manual intervention is extremely high, severely restricting the automation level and processing capacity per unit time of the production line. In addition, frequent manual cleaning may also damage the surface of the filter press plate 2, shorten the service life of vulnerable parts, and result in low sludge treatment efficiency. This embodiment proposes a filter press 7, which includes a body 71, a filter plate assembly 72, a drive unit 73, and at least one vibration component 74. In this embodiment, there are two vibration components 74, which are symmetrically arranged above the filter plate assembly 72. The filter plate assembly 72, the vibration component 74, and the drive unit 73 are mounted on the body 71. The filter plate assembly 72 includes multiple interconnected filter plates 2. The drive unit 73 is connected to one of the filter plates 2 and can drive adjacent filter plates 2 to move closer or further apart. The vibration component 74 includes a vibration unit 8 and a piston unit 9. A demolding air bladder 211 is provided on the filter plate 2. The piston unit 9 is connected to the demolding air bladder 211, and the vibration unit 8 is connected to the drive unit 73. When the drive unit 73 drives the filter plates 2 to move further apart, the vibration unit 8 strikes the filter plates 2 while the piston unit 9 inflates the demolding air bladder 211.

[0024] In this embodiment, when the filter press 7 is working, the drive unit 73 (such as a hydraulic cylinder 731) is connected to one of the filter plates 2, which can drive all the interconnected filter plates 2 to move closer or further apart on the machine body 71; when the drive unit 73 pushes each filter plate 2 closer together and presses them together, a filter chamber is formed between adjacent filter plates 2, the concentrated slurry is injected into the filter chamber under high pressure, water is discharged through the filter surface of the filter plate 2, and solid particles gradually deposit to form a dense sludge cake (moisture content less than or equal to 5%); after filtration is completed, the drive unit 73 pulls the filter plate 2 connected to it in the opposite direction, causing each filter plate 2 to move further apart. During this process, due to the connection between the vibration unit 8 and the drive unit 73... Next, the action of the drive unit 73 synchronously triggers the vibration unit 8 to strike each filter press plate 2, breaking the static adhesion between the mud cake and the filter surface. At the same time, the piston unit 9, which is linked with the vibration unit 8, starts to work, inflating the demolding airbag 211 that is pre-set on the filter press plate 2. The airbag expands and pushes the mud cake out from the inside. Under the dual action of vibration loosening and airbag pushing, the mud cake is completely separated from the filter surface and falls off by itself under the action of gravity. The mud cake after falling off is used for slope greening, temporary land reclamation or ecological slope protection, while the clean water discharged from the filter press 7 flows into the clean water pool and is recycled for pulping, washing and dust suppression on site, thereby achieving zero discharge, full recycling and resource utilization of waste mud.

[0025] In a preferred embodiment, the vibration unit 8 includes a mounting base 81 and a plurality of vibrating elements 82. Each vibrating element 82 is mounted on the mounting base 81 and is spaced apart along the length of the mounting base 81. Each vibrating element 82 includes a mounting shaft 821 and a rotating shaft 822 with their axes perpendicular to each other. The mounting shaft 821 is rotatably mounted on the mounting base 81. One end of the mounting shaft 821 is coaxially fixedly connected to a gear 823, and the other end of the mounting shaft 821 is coaxially fixedly connected to a driving bevel gear 824. The rotating shaft 822 is rotatably connected to the mounting base 81 through a connecting seat (not shown). A driven bevel gear 825 is coaxially fixedly connected to the rotating shaft 822, and the driving bevel gear 824 and the driven bevel gear 825 mesh with each other. A cam portion 826 is provided between two adjacent rotating shafts 822.

[0026] When the drive unit 73 (hydraulic cylinder 731) drives the push-pull plate 732 and each filter plate 2 to move away from each other, the rack 733 fixedly installed on the top of the push-pull plate 732 moves linearly accordingly, and each gear 823 meshing with the rack 733 rotates synchronously under the drive of the rack 733; each gear 823 is fixedly connected to one end of the same mounting shaft 821, and the mounting shaft 821 is rotatably mounted on the mounting base 81, so the gear 823 drives the mounting shaft 821 to rotate around its own axis. The other end of the mounting shaft 821 is coaxially fixed with a driving bevel gear 824, which meshes with a driven bevel gear 825 coaxially fixed on the rotating shaft 822. The axes of the driving bevel gear 824 and the driven bevel gear 825 are perpendicular to each other, thereby converting the rotational motion of the mounting shaft 821 into the rotation of the rotating shaft 822 around its own axis. Each rotating shaft 822 is arranged at intervals along the length of the mounting base 81. A cam part 826 is provided between two adjacent rotating shafts 822. When the rotating shaft 822 rotates, the cam part 826 performs an eccentric rotational motion, periodically striking the contact strip 8263 above the filter press plate 2. The contact strip 8263 directly transmits the mechanical vibration generated by the striking to each filter press plate 2, thereby applying a striking to each filter press plate 2, breaking the static adhesion between the mud cake and the filter surface, and assisting the mud cake to fall off.

[0027] In a preferred embodiment, the cam portion 826 includes two mounting blocks 8261, which are respectively fixedly mounted on the ends of two rotating shafts 822. A connecting shaft is eccentrically connected between the two mounting blocks 8261, and a contact cylinder 8262 is sleeved on the connecting shaft. A contact strip 8263 is provided above the filter press plate 2. The contact strip 8263 can be extended or shortened. When the rotating shaft 822 rotates, it drives the contact cylinder 8262 to strike the contact strip 8263.

[0028] In this embodiment, when the rotating shaft 822 rotates around its own axis under the drive of the gear 823, the mounting shaft 821 and the bevel gear 823 pair, the mounting blocks 8261 fixedly installed at the ends of the two adjacent rotating shafts 822 rotate synchronously. Since the two mounting blocks 8261 are connected eccentrically by a connecting shaft, and a freely rotatable contact cylinder 8262 is sleeved on the connecting shaft, as the rotating shaft 822 rotates, the outer edge of the contact cylinder 8262 periodically approaches and strikes the contact strip 8263 placed above the filter press plate 2. The contact strip 8263 is a flexible contact strip 8263, which can undergo a certain amount of compression deformation to avoid direct interference between the contact cylinder 8262 and the contact strip 8263. The contact strip 8263 directly transmits the vibration generated by the striking to each filter press plate 2 below, thereby applying the striking force, breaking the adhesion between the mud cake and the filter press plate, and assisting the mud cake to fall off.

[0029] In the first embodiment, the piston unit 9 includes a plurality of piston cylinders 91 fixedly mounted on the mounting base 81. A piston cavity 92 is formed inside the piston cylinder 91. A piston ring 93 is slidably connected to the piston cavity 92. A push rod 94 is hinged to the piston ring 93 and is hinged to the contact cylinder 8262. A first circular hole 95 and a second circular hole are provided on the piston cylinder 91 and communicate with the piston cavity 92. A first one-way valve is provided at the first circular hole 95 and a second one-way valve is provided at the second circular hole. A pipe 96 is connected to the second circular hole and communicates with the demolding airbag 211. The drive unit 73 includes a hydraulic cylinder 731 fixedly mounted on the machine body 71. A push-pull plate 732 is connected to the piston end of the hydraulic cylinder 731. The push-pull plate 732 is connected to one of the filter plates 2. A rack 733 is fixedly provided on the top of the push-pull plate 732. The rack 733 meshes with each gear 823 and does not contact the top of each filter plate 2. This embodiment is further improved to achieve a bidirectional action: the demolding airbag 211 actively contracts when the filter plates 2 are close to each other and inflates when they are far apart. Specifically, a third circular hole communicating with the piston chamber 92 is provided on the piston cylinder 91. A third one-way valve is provided at the third circular hole. The conduction direction of the third one-way valve is opposite to that of the second one-way valve, allowing gas to flow back from the demolding airbag 211 to the piston chamber 92 through the pipe. At the same time, a normally closed solenoid valve is connected in parallel next to the first one-way valve in the first circular hole 95. The control end of the solenoid valve... The hydraulic cylinder 731 of the drive unit 73 is linked to the action signal; when the drive unit 73 drives the filter plates 2 to move away from each other, the hydraulic cylinder 731 extends, the rack 733 moves forward, the rack 733 drives the gear 823, the mounting shaft 821 and the rotating shaft 822 to rotate, and the contact cylinder 8262 pushes the piston ring 93 to compress the piston chamber 92 through the push rod 94. At this time, the solenoid valve is de-energized and closed, the first check valve is closed because the piston chamber pressure is higher than atmospheric pressure, the second check valve opens, and gas is forced into the demolding air bag 211. Its expansion ejects the mud cake; when the drive unit 73 drives each filter plate 2 to approach each other, the hydraulic cylinder 731 retracts, the rack 733 moves in the opposite direction, the rotating shaft 822 reverses, and the contact cylinder 8262 pulls the piston ring 93 backward through the push rod 94, increasing the volume of the piston chamber 92. At this time, the controller energizes the solenoid valve to open it, and at the same time, the third check valve opens under the negative pressure of the piston chamber. The gas in the demolding airbag 211 is actively drawn back into the piston chamber 92 through the third round hole and the third check valve, while the opening of the solenoid valve allows external... Atmospheric air enters the piston chamber 92 through the first circular hole to supplement the air volume and avoid excessive negative pressure. As the filter plates approach each other, the demolding airbag 211 actively contracts and returns to its flat state, creating conditions for the sealing of the filter chamber in the next filter press cycle. When the filter plates move away from each other again, the solenoid valve is de-energized and closed, and the third one-way valve closes due to the reverse pressure difference, restoring the original one-way inflation working mode. This cycle realizes that the inflation and deflation of the demolding airbag 211 completely follow the opening and closing action of the filter plates 2, without the need for an additional air source.

[0030] In this embodiment, when the drive unit 73 drives each filter plate 2 to move away from each other, the linear motion directly drives the mounting shaft 821 to rotate synchronously through the rack 733 and gear 823, thereby generating two actions at the same time: on the one hand, the cam part 826 strikes the contact bar 8263 to apply a knock, and on the other hand, the movement of the contact cylinder 8262 drives the piston unit 9 to inflate the demolding airbag 211, and the demolding airbag 211 pushes out the mud cake.

[0031] In the second embodiment, the piston unit 9 includes a plurality of piston cylinders 91 fixedly mounted on the mounting base 81. A piston cavity 92 is formed inside the piston cylinder 91. A piston ring 93 is slidably connected to the piston cavity 92. A push rod 94 is hinged to the piston ring 93 and is hinged to the contact cylinder 8262. A second circular hole communicating with the piston cavity 92 is opened on the piston cylinder 91. A pipe 96 is connected to the second circular hole and communicates with the demolding airbag 211. The drive unit 73 includes a hydraulic cylinder 731 fixedly mounted on the machine body 71. A push-pull plate 732 is connected to the piston end of the hydraulic cylinder 731. The push-pull plate 732 is connected to one of the filter plates 2. A rack 733 is fixedly provided on the top of the push-pull plate 732. The rack 733 meshes with each gear 823. The rack 733 does not contact the top of each filter plate 2.

[0032] The second implementation differs from the first in that the first circular hole is omitted, and the first and second one-way valves are not used. The piston chamber 92, pipe 96, and demolding airbag 211 are directly connected. The piston chamber 92 is filled with liquid (such as hydraulic oil). When the filter press 7 completes filtration and needs to remove the sludge cake, the drive unit 73 (hydraulic cylinder 731) drives the push-pull plate 732 and the filter press plate 2 connected to it to move away from each other. The rack 733 fixed to the top of the push-pull plate 732 moves linearly, driving the gears 823 meshing with it to rotate synchronously. The gears 823 drive the mounting shaft 821 to rotate, and the motion is transmitted to the rotating shaft 822 through the meshing of the driving bevel gear 824 and the driven bevel gear 825. The rotating shaft 822 causes the contact cylinders 8262 between two adjacent rotating shafts 822 to strike the contact strips 8263 above the filter press plate 2. The contact strips 8263 act on each filter press plate 2 to apply mechanical impact to break the static adhesion between the sludge cake and the filter press plate 2. On one hand, the movement of the contact cylinder 8262 drives the piston ring 93 to slide within the piston chamber 92 via the hinged push rod 94. Since the first circular hole and one-way valve are eliminated in the second embodiment, the piston chamber 92, pipe 96, and demolding airbag 211 are directly connected, and the piston chamber 92 is filled with liquid. The sliding of the piston ring 93 forces the liquid through the pipe 96 into the demolding airbag 211, causing the demolding airbag 211 to push the mud cake from the inside out, thus completely removing the mud cake under the combined action of vibration and pushing. When When the drive unit 73 moves in the opposite direction, it drives each filter plate 2 to move closer to each other for the next round of filtration. The rack 733 moves in the opposite direction, and the gear 823, mounting shaft 821 and rotating shaft 822 reverse accordingly. The contact cylinder 8262 continues to strike the contact bar 8263. At the same time, the contact cylinder 8262 pulls the piston ring 93 to slide in the opposite direction through the push rod 94. The liquid in the demolding air bag 211 flows back to the piston chamber 92 through the pipe 96. The demolding air bag 211 contracts and returns to its original shape, preparing for the next filtration cycle.

[0033] The mechanical transmission chain consisting of gear 823, rack 733, and bevel gear 823 synchronously realizes the two actions of impact vibration and demolding airbag 211 expansion / contraction, without the need for a separate air source, hydraulic control circuit, or additional sensor / program control. The significant advantages of this coupled linkage are: firstly, the impact and the pushing of the demolding airbag 211 are strictly synchronized and fully linked with the separation action of the filter press plate 2, ensuring that the mud cake is immediately pushed outward by the demolding airbag 211 as its static adhesion is broken by vibration. The dual action is highly efficient and the mud cake is removed more thoroughly. Secondly, compared with the traditional separate setting of vibration and airbag drive, By using a drive device, this solution significantly simplifies the structure, reduces the number of actuators and control points, and lowers the equipment manufacturing cost and failure rate. At the same time, by adopting a direct connection method, the demolding airbag 211 expands rapidly and the ejection force is stable and controllable. When the drive unit 73 moves in the reverse direction, the liquid automatically flows back and the demolding airbag 211 contracts on its own, without the need for an additional reset mechanism. The entire system relies on only one power source to complete the linkage of three actions: separation of the filter press plate 2, impact vibration, and pushing of the demolding airbag 211. It has high energy utilization efficiency, simple and reliable control logic, and is suitable for the frequent filter press cake unloading conditions in waste mud recycling and treatment.

[0034] The filter press assembly 72 also includes a fixing plate 1 and a connecting unit 3. Multiple filter press plates 2 are disposed on the right side of the fixing plate 1. Each filter press plate 2 is movably connected to the fixing plate 1 via the connecting unit 3, allowing each filter press plate 2 to switch between a vertical and an inclined posture relative to the fixing plate 1. The fixing plate 1 is fixedly mounted on the body 71 of the filter press. In this embodiment, there are multiple filter press plates 2, which can be arranged according to the needs of the filter press. In this embodiment, the piston rod of the hydraulic cylinder 731 is connected to the rightmost filter press plate 2. When the driving unit 73 drives each filter press plate 2 to approach each other to form a first state, each filter press plate 2 switches to a vertical posture, and the filter surface of each filter press plate 2 is at its maximum effective filtration area. When the driving unit 73 drives each filter press plate 2 to move away from each other to form a second state, each filter press plate 2 switches to an inclined posture, the distance between adjacent filter press plates 2 increases, and the filter surface of each filter press plate 2 is inclined relative to the vertical direction. At the same time, the filtration area of ​​the filter press plate 2 decreases. The first and second states can be switched between each other.

[0035] In the initial state, the piston rod of the hydraulic cylinder 731 extends, driving each filter plate 2 to move to the left and approach each other, entering the first state. At this time, each filter plate 2 is switched to a vertical posture by the guidance and constraint of the connecting unit 3, and the filter surface of each filter plate 2 is fully expanded to the maximum effective filter area, thereby meeting the requirements of high-pressure filtration for the filter area. When filtration is completed and the mud cake attached to the filter surface needs to be removed, the drive unit 73 drives each filter plate 2 to move away from each other and enter the second state in the opposite direction to the right. During this process, the connecting unit 3 drives each filter plate 2 to switch to an inclined posture in sync, so that the filter surface forms a certain angle relative to the vertical direction. At the same time, the distance between adjacent filter plates 2 increases. More importantly, the filter surface of each filter plate 2 shrinks from the maximum area to a smaller area. This reduction in area directly reduces the contact area and adhesion strength between the mud cake and the filter surface. Unlike existing filter presses 7, which rely solely on the sliding plate to separate the filter cake by its own weight, often resulting in cake residue due to excessive adhesion, this invention achieves a synergistic effect of multiple cake unloading mechanisms by linking the movement of the filter plates 2 away from each other with their tilting posture and the shrinkage of the filtration area. This eliminates the need for manual scraping or high-pressure water gun assistance, improving the thoroughness and automation of cake unloading. After cake unloading is complete, the drive unit 73 drives the filter plates 2 to move closer together again. The filter plates 2 automatically return to their vertical posture and the filtration surface expands back to its maximum area, ready for the next filtration cycle.

[0036] In a preferred embodiment, the connecting unit 3 includes multiple cross frames 31 and cross rods 32. The cross frames 31 and cross rods 32 are hinged together. Each cross frame 31 is mounted on a corresponding filter press plate 2, and adjacent cross frames 31 are hinged together. The cross rod 32 includes a first connecting rod 321 and a second connecting rod 322. The first end of the first connecting rod 321 and the first end of the second connecting rod 322 are hinged together at the same hinge point on the fixing plate 1. The cross frame 31 includes a third connecting rod 311 and a fourth connecting rod 312. The third connecting rod 311 and the first connecting rod 322 are hinged together at the same hinge point on the fixing plate 1. The cross frame 31 includes a third connecting rod 311 and a fourth connecting rod 312. The third connecting rod 311 and the first connecting rod 322 are hinged together at the same hinge point on the fixing plate 1. The four connecting rods 312 are arranged in a cross configuration, and the intersection of the third connecting rod 311 and the fourth connecting rod 312 is hinged to the corresponding filter plate 2. The second end of the first connecting rod 321 is hinged to the first end of the third connecting rod 311, and the second end of the second connecting rod 322 is hinged to the first end of the fourth connecting rod 312. The second end of the third connecting rod 311 is hinged to the first end of the fourth connecting rod 312 on the adjacent cross frame 31, and the second end of the fourth connecting rod 312 is hinged to the first end of the third connecting rod 311 on the adjacent cross frame 31.

[0037] The connecting unit 3 adopts a scissor-type connecting unit 3 to realize the synchronous movement and attitude transformation of each filter press plate 2. Specifically, the fixed plate 1 is provided with a hinge point, where the first end of the first connecting rod 321 and the first end of the second connecting rod 322 in the cross rod 32 are hinged together; the second end of the first connecting rod 321 is hinged to the first end of the third connecting rod 311 in the cross frame 31 on the first filter press plate 2, and the first end of the second connecting rod 322 is hinged to the first end of the fourth connecting rod 312 in the same cross frame 31. Each filter press plate 2 is equipped with a cross frame 31, which is formed by a third connecting rod 311 and a fourth connecting rod 312, and is hinged to the filter press plate 2 at the intersection. The cross frames 31 of adjacent filter press plates 2 are hinged to each other. The second end of the third connecting rod 311 of the previous cross frame 31 is hinged to the first end of the fourth connecting rod 312 of the next cross frame 31, and the second end of the fourth connecting rod 312 of the previous cross frame 31 is hinged to the first end of the third connecting rod 311 of the next cross frame 31. When the drive unit 73 drives the outermost filter press plate 2 away from the fixed plate 1, the first connecting rod 321 and the second connecting rod 322 rotate outward around the common hinge point on the fixed plate 1, respectively pushing the third and fourth connecting rods 312 of the first cross frame 31 to open. Then, the motion is transmitted step by step through the hinge relationship between adjacent cross frames 31, so that all filter press plates 2 move away from each other synchronously and equidistantly.

[0038] In a preferred embodiment, the filter press 2 includes a sliding table 21, a first filter plate 22, and a second filter plate 23. A mounting plate 24 is fixedly installed on the sliding table 21. One end of the mounting plate 24 is hinged to the first filter plate 22, and the other end of the mounting plate 24 is hinged to the second filter plate 23. The first filter plate 22 and the second filter plate 23 are arranged in parallel. A first rod 25 and several parallel second rods 26 are arranged between the first filter plate 22 and the second filter plate 23. A connecting post 27 is provided at the middle position of the mounting plate 24. The connecting post 27 is fixedly installed on the mounting plate 24 and is hinged to the first rod 25. One end of the second rod 26 is hinged to the first filter plate 22, and the other end of the second rod 26 is hinged to the second filter plate 23. The first rod 25 and the second rod 26 are arranged in parallel. The intersection of the third connecting rod 311 and the fourth connecting rod 312 is hinged to the connecting post 27. A demolding airbag 211 is arranged on the sliding table 21.

[0039] In this embodiment, the filter press 2 consists of a sliding table 21, a first filter plate 22, and a second filter plate 23. A mounting plate 24 is fixedly installed on the sliding table 21. One end of the mounting plate 24 is hinged to the first filter plate 22, and the other end is hinged to the second filter plate 23. The first filter plate 22 and the second filter plate 23 are always arranged in parallel. To achieve synchronization between the first filter plate 22 and the second filter plate 23, a first rod 25 and several parallel second rods 26 are provided between them. A connecting post 27 is provided in the middle of the mounting plate 24. This connecting post 27 is hinged to the first rod 25 and also hinged to the intersection of the aforementioned third connecting rod 311 and fourth connecting rod 312, thereby transmitting the movement of the cross frame 31 to the filter press 2 and achieving the deformation of the filter press 2.

[0040] In one possible implementation, the connecting column 27 is configured to be slidably mounted on the mounting plate 24. In the scheme where the connecting column 27 is fixedly mounted on the mounting plate 24, the tolerances of the positions of all hinge points may accumulate, which may cause additional bending moments when the cross frame 31 moves, but will not interfere. After the connecting column 27 is slidably mounted, its position can be automatically adjusted within a certain range (e.g., sliding along the longitudinal direction of the mounting plate 24) to compensate for the length errors of each member, the deviation of the hinge hole positions, and the straightness errors of the guide rail of the sliding table 21, making the movement of the entire scissor lift mechanism smoother, reducing the risk of jamming and abnormal noise, and improving reliability.

[0041] In a preferred embodiment, a drive rod 4 is also included. One end of the drive rod 4 is hinged to the second end of the second connecting rod 322, and the other end of the drive rod 4 is hinged to one of the second rod bodies 26. Further, the first filter plate 22 and the second filter plate 23 have the same structure; the first filter plate 22 includes a plurality of filter plate bodies 5, adjacent filter plate bodies 5 are interconnected, wherein the filter plate body 5 located at the end face is hinged to the mounting plate 24.

[0042] In this embodiment, when the drive unit 73 drives each filter plate 2 to switch from the first state to the second state, the second connecting rod 322 rotates around its hinge point with the fixed plate 1, and its second end drives the drive rod 4 to move. The drive rod 4 then pushes the second rod body 26, which is hinged to it, to rotate around the hinge point, thereby actively pulling the first filter plate 22 and the second filter plate 23 together. In order to further reduce the area of ​​the filter surface during the closing process and adapt to the cake unloading requirements under the inclined posture, the first filter plate 22 and the second filter plate 23 adopt the same segmented structure. Each filter plate is composed of several filter plate bodies 5 connected in sequence. Adjacent filter plate bodies 5 can rotate relative to each other, and the filter plate body 5 located at the end face is hinged to the mounting plate 24. When the second rod body 26 rotates and drives the first filter plate 22 and the second filter plate 23 to close inward, the whole rotates around the hinge point of the mounting plate 24 from the vertical state to the inclined state.

[0043] Furthermore, the filter plate body 5 includes a first plate body 51 and a second plate body 52. ​​The first plate body 51 has a pressure chamber 53, and the second plate body 52 is slidably connected to the pressure chamber 53. The first plate body 51 has a plurality of exhaust holes 54, which are connected to the pressure chamber 53. Each exhaust hole 54 is provided with a first one-way valve diaphragm. The first plate body 51 has an air inlet hole 55, which is connected to the pressure chamber 53. A second one-way valve diaphragm is provided at the air inlet hole 55. The filter plate body 56 also includes an air inlet pipe 56, which is connected to a plurality of branch air pipes 57. Each branch air pipe 57 is connected to a corresponding air inlet hole 55. The air inlet pipe 56 is connected to a high-pressure air source.

[0044] In this embodiment, a pressure chamber 53 is formed between the first plate 51 and the second plate 52 constituting the filter plate body 5. The second plate 52 is slidably connected to the pressure chamber 53, and a filter hole 58 is provided on the second plate 52 for filtering water in the slurry. The first plate 51 is provided with exhaust holes 54 that communicate with the pressure chamber 53. Each exhaust hole 54 is provided with a first one-way valve membrane (which only allows gas to be discharged from the pressure chamber 53 to the outside). The first plate 51 is also provided with an air inlet hole 55 with a second one-way valve membrane (which only allows gas to enter the pressure chamber 53 from the outside). All air inlets 55 are connected to the air inlet pipe 56 through a branch air pipe 57. When transitioning from the second state to the first state, the first one-way valve diaphragm closes, the second one-way valve diaphragm opens, and the volume of the pressure chamber 53 gradually increases. External high-pressure gas enters each pressure chamber 53 through the inlet pipe 56, branch pipe 57, inlet hole 55, and the second one-way valve diaphragm, pushing the second plate 52 to slide outward relative to the first plate 51, so that the filter surface is fully expanded to the maximum effective filtration area. At the same time, the pressure chamber 53 is filled with high-pressure gas. When the filtration is completed and the drive unit drives each filter plate 2 to transition from the first state to the second state, the drive rod 4, through the second rod 26, causes the first filter plate 22 and the second filter plate 23 to retract, and the second plate 52 slides into the first plate 51. As the filter press gradually slides into the air pressure chamber 53 of the first plate 51, it compresses the gas inside. Due to the second one-way valve membrane preventing gas backflow, the compressed high-pressure gas can only be ejected outward through the exhaust port 54 via the first one-way valve membrane. These exhaust ports 54 are located on the side of the first plate 51 (i.e., the area where the filter surface contacts the filter cake). The high-speed airflow directly impacts the interface between the filter cake and the filter surface, generating an air cushion peeling effect. At the same time, as the second plate 52 slides inward, its edges scrape off the filter cake adhering to the filter surface. Combined with the overall tilting posture of the filter press 2 and the shrinkage of the filter area, these factors together constitute a triple cake unloading mechanism of tilting self-weight sliding, mechanical scraping, and high-pressure air blowing. Conversely, when the drive unit drives each filter plate 2 to reset from the second state to the first state, the drive rod 4 moves in the opposite direction, and the filter plate body 5 re-unfolds under the drive of the parallelogram mechanism. Without the need for additional power, due to the increased volume of the air pressure chamber 53, the external high-pressure gas can spontaneously re-enter the air pressure chamber 53 through the air inlet pipe 56, branch air pipe 57, and air inlet hole 55, pushing the second plate body 52 to slide outward, restoring the filter surface to its maximum area, and preparing for the next cycle of filtration. By directly linking the sliding compression action of the second plate body 52 with the retraction action of the drive unit, connecting unit 3, and segmented filter plate body 5, this solution can automatically generate gas impact and mechanical scraping at the moment of cake discharge without additional power or separate control commands. It achieves a high degree of integration of structure, motion, and air path, and significantly improves the thoroughness of cake discharge and the level of automation compared with the existing filter press 7 that relies only on gravity or passive air blowing.

[0045] In a preferred embodiment, a filter chamber is formed between adjacent filter plates 2, and a plurality of filter holes 58 are provided on the second plate 52. A filter channel 59 is formed between the first filter plate 22 and the second filter plate 23. A connecting plate 591 is also included, one end of which is hinged to the first filter plate 22, and the other end of which is hinged to the second filter plate 23.

[0046] In this embodiment, after the filter press structure is installed on the filter press, a filter chamber is formed between adjacent filter plates 2. The concentrated slurry enters each filter chamber through the feed inlet. Under the action of the filter press pressure, the water in the slurry passes through the multiple filter holes 58 opened on the second plate 52 in sequence and enters the filter channel 59 between the first filter plate 22 and the second filter plate 23. Finally, it is discharged from the end of the filter channel 59 (for example, the two ends of the frame on the filter press 7). The solid particles in the slurry are trapped on the filter surfaces of the first plate 51 and the second plate 52, gradually forming a dense mud cake, which adheres to the filter surfaces of the first filter plate 22 and the second filter plate 23 (i.e., the outer surfaces of the first plate 51 and the second plate 52 of each filter plate body 5). In order to form a closed and structurally stable filtration channel 59, in addition to using an mounting plate 24 to connect one end of the first filter plate 22 and the second filter plate 23, this solution also adds a connecting plate 591. One end of the connecting plate 591 is hinged to the first filter plate 22 and the other end is hinged to the second filter plate 23. The mounting plate 24 and the connecting plate 591 are located on both sides of the filter plate, and together with the first filter plate 22 and the second filter plate 23, they form a frame-type closed filtration channel 59, ensuring that the filtered water can flow smoothly out from both ends of the frame without leaking to the outside of the filtration chamber. When the filter press is complete and cake unloading is required, the drive unit drives each filter press plate 2 to switch from the first state to the second state: First, the drive rod 4 drives the first filter plate 22 and the second filter plate 23 to retract inward through the second rod body 26, reducing the filtration area; Second, the second plate body 52 is pushed into the air pressure chamber 53 of the first plate body 51, compressing the gas in the chamber. The high-pressure gas is ejected through the exhaust holes 54 on both sides of the first plate body 51, directly impacting the interface between the mud cake and the filter surface, forming an air cushion peeling; At the same time, when the second plate body 52 slides into the first plate body 51, the mud cake adhering to the second plate body 52 is detached from the second plate body 52 and scraped off.

[0047] In this embodiment, when the driving unit drives each filter plate 2 to switch from the first state to the second state, the scissor-type connecting unit 3 in the connecting unit 3 synchronously drives the filter plate 2 to tilt as a whole, so that the filter surface forms a certain tilt angle relative to the vertical direction. At the same time, the driving rod 4 and the second rod 26 force the first filter plate 22 and the second filter plate 23 to tilt and retract, so that the effective area of ​​the filter surface is reduced, thereby significantly reducing the contact area and adhesion strength between the mud cake and the filter surface. Based on this, the retraction action also forces the second plate 52 to slide inward along the air pressure chamber 53. On the one hand, it uses its edge to mechanically scrape off the adhering mud cake, and on the other hand, it compresses the high-pressure gas in the air pressure chamber 53, causing the gas to be ejected at high speed through the exhaust hole 54 arranged on the side of the first plate 51, directly impacting the interface between the mud cake and the filter surface, forming an air cushion peeling effect. The reduced adhesion caused by the decrease in filter area, the mechanical scraping of the sliding scraper, and the impact purging of high-pressure gas all work simultaneously and superimpose under the same driving action, so that even high-viscosity, high-moisture mud cakes can be easily and completely removed. After the unloading is completed, the drive unit moves in the opposite direction, the filter plate 2 automatically returns to its vertical position, the filter surface is re-expanded to the maximum area, and the air pressure chamber 53 automatically draws air from the external high-pressure air source to recharge due to the increase in volume, preparing for the next cycle. Apart from the drive unit, the entire process requires no additional control commands or auxiliary power. The structure is highly integrated and the operation is reliable. Compared with the existing filter press 7, which relies solely on linear pulling and the cake falling off by its own weight, the cake unloading of the present invention is more thorough, and the filtration cycle is shortened. The processing capacity per unit time of the filter press 7 is improved, while manual intervention is reduced, the labor intensity and maintenance costs of operators are reduced, and the service life of filter plates and filter cloth is extended. The invention achieves efficient, automatic and clean operation in high-viscosity slurry dewatering scenarios and has high application value.

[0048] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. An integrated treatment system for the complete resource utilization and zero discharge of engineering mud, characterized in that, It includes a crushing and screening zone, a pulping and conditioning zone, a sand-water separation zone, a mud-water concentration zone, and a filter press dewatering zone connected in sequence; The crushing and screening zone is equipped with a crusher, conveyor belt, and integrated screening machine for separating coarse aggregates and outputting a mud-sand-water mixture. The slurry conditioning zone is equipped with a slurry mixer for adding water to the mud-sand-water mixture and stirring it into a uniform slurry. The sand-water separation zone is equipped with a wheel washer and a dewatering screen for separating fine aggregates from the slurry and outputting a mud-water mixture. The mud-water concentration zone is equipped with a slurry tank and at least two integrated concentration tanks for separating the mud-water mixture into supernatant and concentrated slurry. The filter press dewatering zone is equipped with a filter press for pressing the concentrated slurry into slurry cakes and discharging the filtrate. It also includes a clear water tank. The filtrate outlet of the filter press and the outlet of the integrated concentration tank are both connected to the clear water tank. The water outlet of the clear water tank is connected to the pulping machine and the washing machine, respectively, forming a closed-loop water supply.

2. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 1, characterized in that: The crusher is used to crush materials to a particle size of less than 20mm, the integrated screening machine separates coarse aggregate with a particle size of greater than or equal to 5mm, and the fine aggregate has a fineness modulus of 2.4~2.8 and a mud content of less than 5%.

3. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 2, characterized in that: The filter press includes a body, a filter plate assembly, a drive unit, and at least one vibration component, wherein the filter plate assembly, the vibration component, and the drive unit are mounted on the body; The filter press assembly includes multiple interconnected filter presses, and the driving unit is connected to one of the filter presses. The driving unit can drive adjacent filter presses to move closer to or further away from each other. The vibration assembly includes a vibration unit and a piston unit. A demolding airbag is provided on the filter press plate. The piston unit is connected to the demolding airbag. The vibration unit is connected to the drive unit. When the drive unit drives each of the filter press plates to move away from each other, the vibration unit applies vibration to each of the filter press plates while the piston unit inflates the demolding airbag.

4. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 3, characterized in that: The vibration unit includes a mounting base and a plurality of vibrating elements, each of which is mounted on the mounting base and is arranged at intervals along the length of the mounting base. The vibrating component includes a mounting shaft and a rotating shaft with their axes perpendicular to each other. The mounting shaft is rotatably mounted on the mounting base. One end of the mounting shaft is coaxially fixedly connected to a gear, and the other end of the mounting shaft is coaxially fixedly connected to a driving bevel gear. A driven bevel gear is coaxially fixedly connected to the rotating shaft, and the driving bevel gear and the driven bevel gear mesh with each other. A cam portion is provided between two adjacent rotating shafts. The cam portion includes two mounting blocks, which are respectively fixedly mounted on the ends of the two rotating shafts. A connecting shaft is eccentrically connected between the two mounting blocks, and a contact cylinder is sleeved on the connecting shaft. A contact strip is mounted above the filter press plate. When the rotating shaft rotates, it causes the contact cylinder to periodically strike the contact strip.

5. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 4, characterized in that: The piston unit includes a plurality of piston cylinders fixedly mounted on the mounting base. A piston cavity is formed inside the piston cylinder. A piston ring is slidably connected in a sealed manner inside the piston cavity. A push rod is hinged to the piston ring and is hinged to the contact cylinder. The piston cylinder has a first circular hole and a second circular hole that communicate with the piston chamber. A first one-way valve is provided at the first circular hole, and a second one-way valve is provided at the second circular hole. A pipe is connected to the second circular hole, and the pipe communicates with the demolding airbag. The drive unit includes a hydraulic cylinder fixedly mounted on the machine body, and a push-pull plate is connected to the piston end of the hydraulic cylinder. The push-pull plate is connected to one of the filter plates. A rack is fixedly installed on the top of the push-pull plate, and the rack meshes with each of the gears.

6. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 5, characterized in that: The filter press plate assembly includes a fixed plate and a connecting unit. Multiple filter press plates are disposed on one side of the fixed plate. Each filter press plate is movably connected to the fixed plate through the connecting unit, so that each filter press plate can switch between a vertical posture and an inclined posture relative to the fixed plate. Each filter press plate has a first state and a second state. When the driving unit drives each of the filter plates to approach each other to form a first state, each of the filter plates switches to a vertical posture and the filter surface of each of the filter plates is at the maximum effective filtration area. When the driving unit drives each of the filter plates to move away from each other to form a second state, each of the filter plates switches to an inclined posture, the distance between adjacent filter plates increases, and the filter surface of each filter plate is inclined relative to the vertical direction.

7. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 6, characterized in that: The connecting unit includes multiple cross frames and cross rods. The cross frames are hinged to the cross rods. Each cross frame is mounted on a corresponding filter press plate. Adjacent cross frames are hinged to each other. The crossbar includes a first connecting rod and a second connecting rod, wherein the first end of the first connecting rod and the first end of the second connecting rod are hinged together at the same hinge point on the fixed plate; The cross frame includes a third connecting rod and a fourth connecting rod, which are arranged in a cross configuration. The cross position of the third connecting rod and the fourth connecting rod is hinged to the corresponding filter plate. The second end of the first connecting rod is hinged to the first end of the third connecting rod, and the second end of the second connecting rod is hinged to the first end of the fourth connecting rod. The second end of the third connecting rod is hinged to the first end of the fourth connecting rod on the adjacent cross frame, and the second end of the fourth connecting rod is hinged to the first end of the third connecting rod on the adjacent cross frame.

8. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 7, characterized in that: The filter press includes a sliding table, a first filter plate, and a second filter plate. An mounting plate is fixedly installed on the sliding table. One end of the mounting plate is hinged to the first filter plate, and the other end of the mounting plate is hinged to the second filter plate. The first filter plate and the second filter plate are arranged parallel to each other. Demolding airbags are disposed on the sliding platform; A first rod and several parallel second rods are provided between the first filter plate and the second filter plate. A connecting post is provided at the middle position of the mounting plate. The connecting post is hinged to the first rod. One end of the second rod is hinged to the first filter plate, and the other end of the second rod is hinged to the second filter plate. The intersection of the third connecting rod and the fourth connecting rod is hinged to the connecting post.

9. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 8, characterized in that: It also includes a drive rod, one end of which is hinged to the second end of the second connecting rod, and the other end of which is hinged to one of the second rod bodies; The first filter plate has the same structure as the second filter plate; the first filter plate includes a plurality of filter plate bodies, and adjacent filter plate bodies are hinged to each other, wherein the filter plate body located at the end face is hinged to the mounting plate.

10. The integrated treatment system for zero-discharge full resource utilization of engineering mud according to claim 9, characterized in that: The filter plate body includes a first plate and a second plate. A pressure chamber is formed in the first plate, and the second plate is slidably and sealed within the pressure chamber. A plurality of exhaust holes are formed on the first plate, and the exhaust holes are connected to the pressure chamber. Each exhaust hole is provided with a first one-way valve diaphragm. An air inlet is formed on the first plate and is connected to the pressure chamber. A second one-way valve diaphragm is provided at the air inlet, allowing only gas to enter the pressure chamber. The filter plate body also includes an air inlet pipe, which is connected to a plurality of branch air pipes. Each branch air pipe is connected to a corresponding air inlet.

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