Garbage dry-wet parallel processing process

Abstract

This invention relates to the field of solid waste resource utilization technology, and in particular discloses a parallel dry and wet waste treatment process, comprising the following steps: S1, pre-treating the raw waste material by using a dry sorting process to obtain multiple particle size materials, including vibrating screening, magnetic separation, and air separation; S2, introducing the medium aggregate from the multiple particle size materials into a wet treatment process to separate the soil, fine particles, and light impurities adhering to the surface of the medium aggregate, forming a solid-liquid mixture; S21, performing solid-liquid separation treatment on the solid-liquid mixture to obtain usable aggregate, recyclable fine sand, and slurry; S22, performing mud-water separation on the slurry to obtain recyclable clean water and mud cake; S3, utilizing the combustible components, usable aggregate, and fine particles obtained from the dry sorting process, and returning the clean water obtained in step S22 to the wet rinsing step of step S2 for recycling, thus forming a water resource recycling system under parallel dry and wet conditions.

Description

Technical Field

[0001] This invention relates to the field of solid waste resource utilization technology, and in particular discloses a dry and wet parallel treatment process for waste. Background Technology

[0002] In the rainy season or under non-standard landfill conditions in South China, waste generally has high moisture content, high soil content, and severe adhesion of light materials. Traditional dry sorting processes, based on vibrating screens, drum screens, and air separation, suffer from poor moisture resistance, easy clogging of screen holes, and incomplete separation of light materials by air separation. When the moisture content of the material exceeds 20% or the soil content exceeds 30%, the screening efficiency and capacity of dry processes drop sharply, necessitating shutdown for screen cleaning and waiting for the material to air dry naturally, resulting in prolonged downtime and extremely high construction costs. While wet treatment methods, such as the existing technology of washing the raw waste material before sorting, can ensure cleanliness, they consume a large amount of water and generate a large amount of wastewater, leading to high subsequent treatment costs and making it difficult to achieve a balance between economic and environmental benefits.

[0003] As can be seen from the above, most existing waste treatment processes adopt a single dry or wet sorting method, which results in insufficient resource recovery. In particular, it is difficult to effectively separate the mud and fine impurities attached to the surface of medium aggregates, leading to low aggregate purity and large loss of recyclables. At the same time, wet treatment processes consume a large amount of water and improper wastewater discharge can easily cause secondary pollution and waste of water resources, making it impossible to achieve efficient and environmentally friendly closed-loop treatment. Summary of the Invention

[0004] To overcome the shortcomings and deficiencies of existing technologies, the present invention aims to provide a dry-wet parallel recycling process suitable for aged waste and construction waste with high moisture content and strong adhesion. This process introduces wet dissociation, solid-liquid separation, and water recycling into a traditional dry screening system, achieving stable sorting and resource utilization under rainy season or high humidity conditions.

[0005] To achieve the above objectives, the present invention provides a waste dry and wet parallel treatment process, comprising the following steps: S1, pre-treat the raw waste material, and process the pre-treated raw waste material through a dry sorting process to obtain multiple particle size materials. The dry sorting process includes at least two of the following: vibrating screen, drum screen, magnetic separation, and air separation. The multiple particle size materials include at least combustible components, usable aggregates, fine particles, and medium aggregates. S2, introduce the medium aggregate and / or materials suitable for wet processing in the dry sorting process into the wet processing process, and separate the mud, fine particles and light impurities attached to the surface of the medium aggregate through the wet washing step to form a solid-liquid mixture. S21, the solid-liquid mixture obtained in step S2 is subjected to multi-stage solid-liquid separation treatment to obtain usable aggregate, recyclable fine sand and mud. S22, The mud is subjected to mud-water separation treatment to obtain clean water and solid mud cake that can be discharged or recycled; S3, the combustible components, usable aggregates and fine particulate materials obtained from the dry sorting process are output as resources or further processed, and the clean water obtained in step S22 is returned to the wet rinsing step in step S2 for recycling, forming a closed-loop water resource recycling system under the condition of dry and wet parallel operation.

[0006] Furthermore, the vibrating screening in the dry separation process of step S1 is at least a two-stage vibrating screening; the two-stage vibrating screening includes the following steps: S11, using an excavator to transfer the pre-treated raw waste material to a plate feeder, the plate feeder transferring the raw waste material fed by the excavator to a first-stage vibrating composite screen for screening to obtain a first layer of oversize material, a second layer of undersize material, and a second layer of oversize material. S12, the material on the second sieve is transferred to a magnetic separator for magnetic separation, and the magnetic separator processes the material on the second sieve to obtain recyclable metal and the first material; S13, the first material is transferred to the second-stage vibrating composite screen for screening to obtain a first layer of oversize material, a second layer of oversize material and a second layer of undersize material; S14, the layer of material obtained from the second-stage vibrating composite screen in step S13 is transferred to the light material sorting machine, and the light material sorting machine separates the first combustible material and the second material; the first combustible material is a long strip-shaped combustible material.

[0007] Furthermore, the air separation in the dry separation process is at least a two-stage air separation, and the two-stage separation includes the following steps: S15, the second material obtained in step S14 is transferred to the first-stage air classifier for air classification to obtain the first aggregate and the second combustible material; S16, the material obtained from the second-layer screen in step S13 is transferred to the second-stage air classifier for air classification to obtain the second aggregate and the third combustible material.

[0008] Furthermore, both the first aggregate and the second aggregate are medium aggregates, and the first aggregate and the second aggregate have different particle sizes.

[0009] Furthermore, the particle size of the first aggregate is 60 < φ ≤ 100 mm; the particle size of the second aggregate is 25 ≤ φ ≤ 60 mm.

[0010] Furthermore, in step S13, the particle size of the two layers of undersize material obtained by the second-stage vibrating composite screen is φ≤25mm, and the two layers of undersize material obtained by the second-stage vibrating composite screen is usable humus; the particle size of the first layer of oversize material obtained in step S13 is 60<φ≤100mm; the particle size of the two layers of oversize material obtained in step S13 is 25≤φ≤60mm.

[0011] Furthermore, the particle size of the second combustible material is 60 < φ ≤ 100 mm; the particle size of the third combustible material is 25 ≤ φ ≤ 60 mm.

[0012] Furthermore, step S11 also includes the following steps: S111, transferring the layer of oversize material obtained from the first-stage vibrating composite screen in step S11 to the manual sorting station for sorting to obtain large pieces of combustible material and large aggregates, wherein the particle size of the layer of oversize material obtained from the first-stage vibrating composite screen is: φ>100mm.

[0013] Furthermore, in step S11, the particle size of the two layers of undersize material obtained by the first-stage vibrating composite screen is φ≤30mm, and the two layers of undersize material obtained by the first-stage vibrating composite screen are usable humus.

[0014] Furthermore, in step S11, the particle size of the material on the second sieve obtained by the first-stage vibrating composite sieve is: 30 < φ ≤ 100 mm.

[0015] Furthermore, the screen surface of the first-stage vibrating composite screen has a bar layer and a screen mesh layer, with the screen mesh layer located below the bar layer; the bar layer includes a first mounting member and a plurality of strip-shaped components disposed on the first mounting member, with the plurality of strip-shaped components being detachably connected to the first mounting member along its length. The first mounting component is provided in multiple sets. The first mounting component is rotatably mounted on the frame of the first-stage vibrating composite screen so that the angle of the bar relative to the screen surface of the screen layer is adjustable. Multiple sets of first mounting components with multiple strip-shaped parts are installed in a gradient with each other to form an inclined first screening section, and the screen layer is inclined to form a second screening section.

[0016] Furthermore, the screen layer is a porous screen that is detachably mounted on the frame of the first-stage vibrating composite screen. The porous screen has mesh holes with a diameter of less than or equal to 30 mm; the distance between two adjacent bars is equal to 100 mm.

[0017] Furthermore, the first-stage vibrating composite screen and the second-stage vibrating composite screen have the same structure. In the second-stage vibrating composite screen, the distance between two adjacent bars is greater than 60mm, and the mesh diameter of the screening screen in the second-stage vibrating composite screen is less than or equal to 25mm.

[0018] Furthermore, the wet rinsing step in step S2 includes: S20, the medium aggregate from step S1 is transferred to the drum washing device, and the drum washing device applies rolling, washing, friction and centrifugal turning action to the medium aggregate so as to separate the mud, fine particles and light impurities in the medium aggregate to obtain a solid-liquid mixture; the drum washing device is equipped with rolling stone bodies and / or wear-resistant blocks inside.

[0019] Furthermore, the multi-stage solid-liquid separation in step S21 includes the following steps: S211, the solid-liquid mixture is fed into the first-stage dewatering screen for preliminary solid-liquid separation to obtain the first-stage oversize and the first-stage undersize. The first-stage oversize is output as usable aggregate and temporarily stored. The first-stage undersize is transferred to the second-stage dewatering screen using a pumping device. S212, the first-stage undersize obtained in step S211 is processed by the second-stage dewatering screen to obtain the second-stage oversize and the second-stage undersize. The second-stage oversize is output as recyclable fine sand, and the second-stage undersize is transferred as slurry to the mud-water separation unit.

[0020] Furthermore, the mud-water separation in step S22 includes the following steps: S221, the mud obtained in step S21 is transported to the flocculation tank for mud-water separation to obtain mud and recycled water; S222, the mud is fed into a plate filter press for deep solid-liquid separation to obtain mud cake and water. The water is mixed with recycled water and then transported to the drum washing device in step S20 as a cleaning liquid for reuse.

[0021] Furthermore, step S211 also includes the following steps: S2111, the first-stage undersize material of the first-stage dewatering screen is pushed to the light material removal mechanism by a water flow propulsion device. The light material removal mechanism is a scraper type or flotation type structure. The light material removal mechanism is used to remove light floating matter of the first-stage undersize material. S2112, downstream of the light material rejection mechanism is a graded inclined screw conveyor and a graded straight screw conveyor, which are used to carry out sedimentation and stratification conveying of the first-stage undersize material after the light material rejection mechanism has removed the light floating matter, so that the coarser and finer particles of the first-stage undersize material enter the second-stage dewatering screen in sequence.

[0022] This invention constructs a parallel dry and wet processing framework. First, dry sorting is used to classify and coarsely select raw waste, allowing materials suitable for wet washing, such as medium aggregates, to enter the wet process at a stable particle size. Then, wet washing achieves thorough separation of soil, fine particles, and light impurities, and multi-stage solid-liquid separation yields aggregates, fine sand, and slurry. A circulating water system is formed through a mud-water separation and reuse system, achieving closed-loop operation of the wet process. This parallel structure allows dry sorting to handle efficient grading, while the wet process handles deep purification, maintaining continuous production capacity even during the rainy season.

[0023] The beneficial effects of this invention are as follows: it significantly improves the sorting stability of high moisture content materials through dry-wet synergy, solving the core pain points of traditional dry processes that are prone to clogging and shutdown during the rainy season; it improves aggregate cleanliness and fine sand recovery rate through wet dissociation and solid-liquid separation; it reduces wastewater discharge through a water circulation system, achieving green environmental protection; and the parallel dry and wet processes can be adaptively adjusted according to the actual moisture content, improving overall production capacity and engineering reliability, and significantly reducing the shutdown rate and operating costs during the rainy season. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the parallel dry and wet waste treatment process of the present invention; Figure 2 This is a detailed flowchart of step S21 in the parallel dry and wet waste treatment process of the present invention. Figure 3 This is a detailed flowchart of step S22 in the parallel dry and wet waste treatment process of the present invention. Figure 4 This is a schematic diagram of the plan structure of the equipment used in an embodiment of the parallel dry and wet waste treatment process of the present invention; Figure 5 This is a schematic diagram of the planar structure of the equipment used in Embodiment 2 of the waste dry and wet parallel treatment process of the present invention; Figure 6 This is a three-dimensional structural diagram of the first-stage vibrating composite screen in Embodiment 1 of the present invention; Figure 7 This is a detailed schematic diagram illustrating the dry sorting steps of Embodiment 1 of the present invention; Figure 8 This is a detailed schematic diagram illustrating the dry sorting steps of Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of the wet sorting process of the present invention; Figure 10 This is a detailed schematic diagram illustrating the wet sorting steps of the present invention.

[0025] The reference numerals in the figures include: 1. Excavator; 2. Plate feeder; 3. First-stage vibrating composite screen; 4. Belt conveyor; 5. Second-stage vibrating composite screen; 6. First-stage air separator; 7. Second-stage air separator; 8. Drum washing device; 91. First-stage drum screen; 92. Second-stage drum screen; 20. Manual sorting station; 30. Frame; 31. Bar layer; 32. Screen layer; 33. First mounting component; 34. Strip component. Detailed Implementation

[0026] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0027] Please see Figures 1 to 10 As shown, this is Embodiment 1 of the present invention, a waste dry and wet parallel treatment process of the present invention, including the following steps: Step S1 processes the pretreated raw waste material using a dry sorting process. The pretreatment involves stockpiling and drying. This dry sorting process includes at least two sorting methods: vibrating screening and air separation. The vibrating screening equipment uses a composite vibrating screen, and the air separation equipment uses an air separator. By combining these devices, the material is classified according to particle size to obtain multiple particle sizes, including medium aggregates.

[0028] Compared to the single sorting method in the existing technology, the combined dry sorting of this solution can effectively improve the material classification accuracy and provide suitable raw materials for subsequent wet processing.

[0029] Specifically, in this embodiment, step S2 introduces the medium aggregate obtained from dry sorting (in this embodiment, qualified medium aggregate is collected and backfilled, while unqualified medium aggregate is introduced into the wet processing process) into the wet processing process via a conveying device. Unqualified medium aggregate is medium aggregate with a high content of fine sand, soil, and light materials on its surface. The medium aggregate obtained in step S2 is transported to an open area for stockpiling via belt conveyor 4, and then introduced into the wet washing process using a combination of excavator 1 and belt conveyor 4. The wet washing process uses a drum washing device to wash the medium aggregate, effectively separating the soil, fine particles, and light impurities adhering to the aggregate surface, forming a solid-liquid mixture.

[0030] Compared to traditional dry processing, the wet rinsing process in this solution significantly improves the cleanliness of aggregates and solves the problem of separating highly adhesive materials.

[0031] In this embodiment, step S21 involves multi-stage solid-liquid separation of the solid-liquid mixture. This process is achieved through at least two stages of dewatering screens. The first stage dewatering screen performs preliminary solid-liquid separation to obtain usable aggregate, while the second stage dewatering screen further separates recyclable fine sand and slurry. Compared to traditional single dewatering processes, the multi-stage solid-liquid separation in this scheme effectively improves the fine sand recovery rate and reduces the impurity content of the aggregate.

[0032] Step S22 involves separating the mud into clean water and solid mud. This process includes flocculation sedimentation and filter press dewatering. By using a combination of a flocculation tank and a filter press, the mud is separated into clean water and solid mud cake. The clean water is then treated and enters the water reuse system to achieve water resource recycling.

[0033] Preferably, in this embodiment, the recycled water tank is divided into a first tank and a second tank. In step S222, the water produced by the plate and frame filter press dewatering and the recycled water generated by the flocculation tank sedimentation are both transported to the first tank for mixing and storage. The first tank is also connected to a tap water supply pipeline for intermittently replenishing the clean water lost during system operation.

[0034] To further improve the quality of reclaimed water and prevent the accumulation of dissolved pollutants in the system, the water in the first tank is introduced into a DTRO water treatment system via a booster pump for advanced treatment. The DTRO system treats the water from the first tank into two parts: one part is a concentrated solution containing high concentrations of pollutants, which is collected and periodically transferred to an external wastewater treatment plant for centralized disposal, thereby effectively removing pollutants from the system; the other part is clear water with extremely low pollutant content that meets the standards.

[0035] The qualified water is transported to the second tank of the recycled water pool for storage. The second tank serves as a storage tank for clean recycled water and is specifically designed to provide cleaning fluid for the drum rinsing device in step S20. The qualified water in the second tank is pumped to the spray system of the drum rinsing device by a water supply pump set, completing the closed-loop circulation and high-quality reuse of the cleaning water.

[0036] Compared with traditional processes, the mud-water separation system in this solution significantly improves the clean water recovery rate and realizes the resource utilization of wastewater.

[0037] Specifically, in step S3, the combustible components, usable aggregates and fine particulate materials obtained from dry sorting are transported to the corresponding resource utilization sections, while the clean water obtained in step S22 is returned to the wet flushing step in step S2 through the pipeline system to be recycled, thus forming a complete closed-loop water resource recycling system.

[0038] Compared with existing technologies, the dry-wet parallel recycling process of this solution not only ensures product quality but also achieves efficient recycling of water resources, resulting in significant economic and environmental benefits.

[0039] Specifically, this embodiment uses a dry sorting process combining a two-stage vibrating screen and a two-stage air separation to sort and screen the raw waste material after it has been dried.

[0040] Specifically, the secondary vibrating screen includes the following steps: In step S11, the dried raw waste material is transferred to the plate feeder 2 by the excavator 1. The plate feeder 2 adopts a heavy-duty chain plate structure to continuously and evenly convey the raw waste material to the first-stage vibrating composite screen 3. The first-stage vibrating composite screen 3 adopts a double-layer screen design, which separates the material into three layers through vibration screening: the first layer of oversize material is ultra-large particle size material, the second layer of undersize material is fine particle size material, and the third layer of oversize material is medium particle size material. The material of each layer is sent to the subsequent process through the corresponding conveying equipment. Compared with the traditional single screening process of screen mesh, the multi-stage screening of this solution effectively improves the material grading accuracy and creates favorable conditions for subsequent sorting.

[0041] In step S12, the material separated from the second layer of the vibrating composite screen 3 is transferred to the magnetic separator via belt conveyor 4. The magnetic separator uses a permanent magnet drum structure, which separates the recyclable metal materials from the second layer of the screen material through a strong magnetic field. The remaining portion is then transported as the first material to the next process. The magnetic separation process achieves efficient recovery of ferrous metals and avoids the impact of metal impurities on subsequent processes. Compared with manual sorting, the magnetic separation process in this solution greatly improves metal recovery efficiency and sorting accuracy.

[0042] In step S13, the first material after magnetic separation is transferred to the second-stage vibrating composite screen 5 via belt conveyor 4. The second-stage vibrating composite screen 5 also employs a multi-layer screen structure, further separating the first material into three particle sizes: oversize material from the first screen, oversize material from the second screen, and undersize material from the second screen. Each particle size is then conveyed to its designated station via corresponding conveying equipment, achieving fine grading of the material. Compared to single-stage screening processes, the two-stage screening system in this solution provides more precise material grading, ensuring subsequent resource utilization.

[0043] Step S14: The material separated from the second-stage vibrating composite screen 5 is transferred to the light material sorting machine via a dedicated conveying device. The light material sorting machine combines mechanical and airflow separation. Through the synergistic action of the feeding mechanism and the negative pressure air separation system, the elongated first combustible material in the first layer of screen material is effectively separated from other materials, yielding the first combustible material and the second material (particle size 60 < φ ≤ 100 mm). Compared to traditional manual sorting, this mechanized sorting method significantly improves sorting efficiency and accuracy while reducing labor costs.

[0044] Specifically, the secondary air separation process following the secondary vibrating screen includes the following steps: In step S15, the second material obtained in step S14 is transferred to the first-stage air separator 6 via belt conveyor 4. The first-stage air separator 6 adopts a horizontal structure. By adjusting the air velocity and air pressure, the second material with a particle size of 60 < φ ≤ 100 mm is separated into a first aggregate and a second combustible material. The first aggregate is clean medium aggregate (particle size of 60 < φ ≤ 100 mm), and the second combustible material is mainly light impurities within this particle size range. Compared with the traditional single air separation process, the targeted air separation treatment of this scheme significantly improves the separation efficiency of materials in this particle size range.

[0045] In step S16, the material obtained from the second-layer screen in step S13 is transferred to the second-stage air classifier 7 via another belt conveyor 4. The second-stage air classifier 7 also adopts a horizontal structure and is specifically designed to process materials with a particle size of 25≤φ≤60mm. Through optimized air duct design, it separates the material into a second aggregate and a third combustible material. The second aggregate is output as small-to-medium-diameter aggregate, while the third combustible material consists of lightweight impurities within this particle size range. Compared to traditional processes, this two-stage air classification system employs differentiated sorting parameters for materials of different particle sizes, significantly improving the recovery rate of materials in each particle size range.

[0046] Specifically, in this embodiment, the sorting effect of the first-stage vibrating composite screen 3 is further optimized: the material on the first screen (φ>100mm) is transferred to the manual sorting station 20 by a heavy-duty belt conveyor (heavy-duty belt conveyor, belt conveyor 4, and light-duty belt conveyor are all shown as belt conveyor 4 in the attached drawings), where operators sort out large pieces of combustible materials and large aggregates and temporarily store them for processing in the next process; the material on the second screen (30<φ≤100mm) enters the subsequent magnetic separation process; the material under the second screen (φ≤30mm) is directly utilized as humus.

[0047] Precise particle size classification enables effective material diversion, providing a solid pretreatment foundation for subsequent processes. Compared to traditional processes, this multi-stage screening method significantly improves material utilization.

[0048] Specifically, in this embodiment, the sorting process of the second-stage vibrating composite screen 5 is further improved: the material on the first screen (60 < φ ≤ 100 mm) enters the light material sorting machine; the material on the second screen (25 ≤ φ ≤ 60 mm) enters the second-stage air separator 7; and the material under the second screen (φ ≤ 25 mm) is used as high-quality humus for resource utilization.

[0049] Precise grading of materials of various particle sizes ensures the effectiveness of subsequent processing steps and maximizes resource recovery. Compared to existing technologies, this solution significantly improves the overall resource utilization rate through the organic combination of multi-stage screening and air separation.

[0050] Specifically, in this embodiment, a complete dry sorting system is formed through the coordinated operation of two-stage vibrating screen and two-stage air classification. The first-stage vibrating screen performs coarse sorting, the second-stage vibrating screen performs fine sorting, and the two-stage air classification processes materials of different particle sizes, ultimately yielding aggregate products, combustible materials, and humus of various specifications. The various processes are closely connected by conveying equipment, forming a continuous production line. Compared to traditional single-stage sorting processes, the coordinated sorting system in this solution further improves processing efficiency and simultaneously enhances product value.

[0051] Preferably, the screen surface of the first-stage vibrating composite screen 3 adopts a composite structure of a bar layer 31 and a screen mesh layer 32. The bar layer 31 consists of multiple sets of first mounting members 33, which are rotatably mounted on the frame 30 via rotating shafts and independently driven by servo motors, making the angle between the strip-shaped components 34 on the first mounting members 33 and the screen surface of the screen mesh layer 32 adjustable. The multiple strip-shaped components 34 are detachably connected to the first mounting members 33 by bolts, and the spacing between adjacent strip-shaped components 34 is set to 100mm.

[0052] Multiple sets of first mounting components 33 are installed in a gradient manner to form a first screening section with an inclination angle. The screen layer 32, located below the bar layer 31, is detachably mounted on the frame 30 via a quick-clamping device. The screen is made of polyurethane or metal with a mesh diameter of 30mm, forming a second screening section with an inclination angle. Both the bar layer 31 and the screen layer 32 extend downwards and are inclined, each connecting to a belt conveyor 4 for material transfer. Compared to traditional fixed screen surfaces, the adjustable bar layer 31 in this design effectively prevents material blockage and significantly improves screening efficiency.

[0053] Preferably, the second-stage vibrating composite screen 5 adopts the same structural design as the first stage, but with optimized key parameters. The spacing between adjacent strip-shaped components 34 in its bar layer 31 is set to 60mm, and the screen layer 32 uses a polyurethane screen or metal mesh with a mesh diameter of 25mm. The angle adjustment range of the bar layer 31 is preferably maintained between 15-45 degrees, allowing for the adaptation to screening requirements of materials with different moisture contents by adjusting the bar angle.

[0054] The quick-release structure of screen layer 32 facilitates the replacement of screens with different aperture sizes to meet various process requirements. Compared to traditional vibrating screens, the adjustable composite screen surface structure of this solution significantly improves the adaptability of the equipment and simultaneously enhances maintenance efficiency.

[0055] The angle adjustment mechanism of the bar layer 31 can also adopt a worm gear transmission device, and the inclination angle of the bar layer 31 can be precisely controlled by a handwheel. The bar-shaped component 34 is made of wear-resistant alloy steel and has a hardened surface treatment, significantly improving its service life compared to ordinary screens. The quick replacement system of the screen layer 32 adopts a guide rail design, which can complete the screen replacement operation in a short time. The vibration motors of the two-stage vibrating composite screen are all frequency converter controlled, and the vibration frequency is adjustable. Compared with traditional screening equipment, the modular design of this solution reduces equipment maintenance costs and extends service life.

[0056] In the actual screening process, the material first enters the bar layer 31. Large-diameter materials pass quickly through the gaps between the bars, medium-diameter materials are guided forward by the bars, and fine materials fall into the lower screen through the gaps. The screen layer 32 precisely classifies the medium-diameter materials, ensuring the separation accuracy of each particle size. By adjusting the angle of the bar layer 31, the adhesion and clogging problem of high-moisture-content materials can be effectively solved. Compared with traditional screening processes, the composite screening structure of this solution significantly improves screening efficiency and is particularly suitable for screening high-moisture-content waste materials.

[0057] Preferably, the bar layer 31 angle adjustment mechanism of the first-stage vibrating composite screen 3 adopts a segmented design. For example, the nine rows of first mounting parts 33 are divided into two independent adjustment zones: the first six rows and the last three rows. The bar angle in the front zone can be adjusted within the range of 25-45 degrees, and the bar angle in the rear zone can be adjusted within the range of 15-30 degrees. When processing materials with high moisture content, the operator can adjust the bar angle in the front zone to 35-40 degrees and the bar angle in the rear zone to 20-25 degrees using the worm gear adjustment device, depending on the viscosity of the material. This segmented adjustment design allows wet and heavy materials to pass through quickly at a larger angle when entering the screen surface, while maintaining an appropriate angle in subsequent sections to prevent wet and heavy materials from falling rapidly and damaging the belt conveyor 4 or falling out of the workstation, thus ensuring screening accuracy.

[0058] Compared to traditional fixed-angle screens, the segmented adjustable structure of this solution improves the processing efficiency of wet heavy materials by more than 40%.

[0059] In this embodiment, the angle adjustment of the bar layer 31 and manual assistance form a collaborative working mechanism. This workstation requires only one operator. When material jamming is detected, the operator can use a special cleaning tool to assist in unblocking through the gaps between the bars. For example, the operator can use a special unblocking rod with an arc-shaped head to easily remove jammed material through the gaps between the bars. The wear-resistant ceramic liner on the bar surface ensures service life and reduces material adhesion.

[0060] The bar layer 31 adopts an open design with a 100mm spacing between adjacent bars, providing ample operating space for manual intervention. Meanwhile, the Teflon coating on the bar surface effectively reduces the likelihood of material adhesion. Compared to traditional screen cleaning methods that require machine shutdown, this solution enables continuous auxiliary operation without stopping the machine, extending the continuous operating time of the equipment by more than three times.

[0061] Specifically, in this embodiment, the wet rinsing step in step S2 includes: In step S20, the medium aggregate obtained from dry sorting is transferred to a drum washing device via excavator 1 and belt conveyor 4. This drum washing device adopts a horizontal cylindrical structure with longitudinal lifting plates on the inner wall of the cylinder, and is filled with natural pebbles with a diameter of 80-150mm as grinding media. The drum rotates at a speed of 10-15 rpm, while cleaning water is sprayed in at a pressure of 0.3-0.5 MPa through nozzles arranged inside the cylinder. During the drum rotation, the aggregate collides and rubs against the grinding media, and is simultaneously subjected to water scouring and centrifugal tumbling, effectively removing dirt, fine particles, and light impurities adhering to the aggregate surface.

[0062] Compared to traditional rinsing methods, the drum rinsing device in this solution significantly improves the cleanliness of aggregates through multiple mechanisms, and further enhances the processing capacity.

[0063] Furthermore, the multi-stage solid-liquid separation in step S21 includes the following steps: In step S211, the solid-liquid mixture discharged from the drum washing device is conveyed to the first-stage dewatering screen via a chute. The first-stage dewatering screen is a linear vibrating screen with a screen surface inclination angle of 15 degrees and a screen mesh diameter of 8 mm. The oversize material is clean aggregate, which is conveyed to the finished product stockpile via a belt conveyor; the undersize material is conveyed to the second-stage dewatering screen via a slurry pump at a flow rate of 30 m³ / h. The slurry pump outlet is equipped with a diversion device to adjust the amount of material entering the second-stage dewatering screen.

[0064] Preferably, in this embodiment, two drum washing devices and two first-stage dewatering screens share one second-stage dewatering screen; that is, refer to Figure 9 As shown, one drum washing device corresponds to one primary dewatering screen. The undersize materials from the two primary dewatering screens are mixed and then enter the light material rejection mechanism for subsequent processes. In actual use, the number of drum washing devices and primary dewatering screens can be adjusted according to the actual material requirements, and there is no limitation here.

[0065] Compared to traditional single-stage dewatering processes, the two-stage dewatering system in this solution further improves aggregate recovery rate and significantly reduces aggregate impurity content.

[0066] Preferably, step S211 further includes the following step: In step S2111, the primary undersize material from the first-stage dewatering screen is conveyed to the light material removal mechanism via a water jet propulsion device. This propulsion device employs an impeller structure with an adjustable impeller speed of 50-100 rpm. By controlling the water flow velocity within the range of 1.5-2.5 m / s, uniform material conveying is ensured. The light material removal mechanism uses a scraper structure with a scraper linear velocity of 0.8-1.2 m / s. The scraper forms a 30-degree angle with the liquid surface, effectively removing lightweight floating objects such as plastic sheets and wood chips from the water.

[0067] The scraper mechanism is driven by a variable frequency motor, allowing for adjustment of operating parameters based on material characteristics. Compared to traditional sedimentation separation methods, this solution's mechanical rejection mechanism significantly improves the removal rate of light substances and further enhances processing efficiency.

[0068] In this embodiment, the light material rejection mechanism and the grading conveying system form a collaborative working unit. The scraper mechanism adopts a segmented design, with a larger spacing between the front scrapers for removing large pieces of light material, and a smaller spacing between the rear scrapers for fine cleaning. The grading screw conveyor is made of wear-resistant alloy steel, and the blade surface is overlaid with a tungsten carbide wear-resistant layer, resulting in a service life three times that of ordinary materials.

[0069] The entire system is automatically controlled via level and pressure sensors, ensuring coordinated operation of all components. Compared to traditional processes, this collaborative system significantly improves the removal rate of light substances and enhances system stability.

[0070] Step S2112 involves employing a combined system of a classifying inclined screw conveyor and a classifying straight screw conveyor. The classifying inclined screw conveyor has an inclination angle of 20 degrees, a screw blade spacing of 200 mm, and a rotation speed of 15-25 rpm, primarily responsible for conveying coarse particles with a relatively fast settling velocity. The classifying straight screw conveyor is horizontally arranged, with a screw blade spacing of 150 mm and a rotation speed of 20-30 rpm, mainly conveying medium-sized particles. The two conveyors are arranged in series, and automatic material classification is achieved by adjusting the speed difference. Compared to traditional single conveying methods, this classifying conveying system improves the separation efficiency of materials of different particle sizes and reduces equipment wear.

[0071] Step S212 involves further processing the undersize material from the first stage using a second-stage dewatering screen. The second-stage dewatering screen is a high-frequency vibrating screen with a 1mm mesh size and a 2-4mm amplitude. The oversize material is recyclable fine sand, collected by belt conveyor 4 for resource utilization; the undersize material is muddy wastewater. A material distribution device is installed at the feeding end of the second-stage dewatering screen to ensure uniform material distribution on the screen surface.

[0072] In this embodiment, the drum washing device and the multi-stage solid-liquid separation system form a collaborative operating unit. The wear-resistant blocks inside the drum can also be made of high-chromium cast iron, with their geometry optimized by rounded arcs to enhance the grinding effect while reducing energy consumption. The multi-stage dewatering screen adopts a modular design, which can be flexibly combined according to the processing capacity requirements. The water balance of the entire system is achieved through a recycled water pipeline network, significantly improving the recycling rate of washing water. Compared with traditional wet treatment processes, the collaborative system in this solution reduces water consumption and significantly improves product quality.

[0073] Specifically, in this embodiment, the mud-water separation in step S22 includes the following steps: Step S221 involves pumping the muddy wastewater from the second-stage dewatering screen into a flocculation tank. For example, the flocculation tank is divided into a rapid mixing zone and a slow flocculation zone. The rapid mixing zone uses a paddle mixer at 120 rpm to ensure thorough mixing of the flocculant and sludge; the slow flocculation zone uses a frame mixer at 40 rpm to promote floc growth. The flocculant dosing system is equipped with a metering pump, and the dosage is automatically adjusted according to the sludge concentration. Compared to traditional flocculation processes, this zoned design significantly improves flocculation efficiency while reducing the amount of flocculant used.

[0074] Step S222 involves using a plate filter press to deeply dewater the sludge obtained from the flocculation tank. For example, the filter chamber thickness is 35mm, the filtration pressure is 0.8-1.2MPa, and the pressing pressure is 1.6-2.0MPa. The filter press cycle includes four stages: feeding, pressing, drying, and unloading, all automatically controlled by a PLC. The sludge cake produced by the filter press has a moisture content ≤35% and is transported off-site via belt conveyor 4. The filtrate is mixed with the supernatant from the flocculation tank (reclaimed water) and then enters the reclaimed water tank, where it undergoes multi-stage filtration and is reused in the drum washing device. Compared to traditional dewatering equipment, this deep dewatering system significantly reduces the moisture content of the sludge cake, and the reclaimed water meets recycling standards.

[0075] In a preferred embodiment, after treatment in the flocculation tank, the supernatant flows by gravity through the overflow weir at the end of the tank into the recycled water collection tank. The recycled water collection tank is equipped with an automatic level control system; when the level reaches a set height, a transfer pump is activated to transport the clean water through pipelines to the recycled water tank. The recycled water tank contains a multi-stage filtration system: the first stage is a stainless steel bar screen to intercept larger suspended solids; the second stage is a 600mm thick quartz sand filter layer with a filtration rate of 8m / h; and the third stage is a 400mm thick activated carbon filter layer for further water purification. The treated clean water is then pumped by a centrifugal pump at a pressure of 0.4-0.6MPa to the spray system of the drum flushing device for reuse. Compared to traditional direct discharge methods, this clean water reuse system reduces fresh water consumption and effectively prevents secondary pollution.

[0076] The sludge at the bottom of the flocculation tank is collected in a sludge collection well through perforated sludge discharge pipes arranged at the bottom of the tank. The sludge collection well is equipped with a submersible agitator rotating at 30-45 rpm to prevent sludge deposition. The sludge is then pumped to the sludge storage tank of the plate filter press at a pressure of 0.8-1.0 MPa using a diaphragm pump. The sludge storage tank is equipped with an ultrasonic level gauge and a density meter to monitor sludge parameters in real time and automatically adjust the feed rate.

[0077] The plate filter press is programmed to complete the feeding, pressing, drying, and unloading processes sequentially. The filter cake produced is fed to belt conveyor 4 via a hydraulic automatic unloading device and finally transported to the designated storage yard.

[0078] The following describes the entire process of the parallel dry and wet waste treatment technology of the present invention in conjunction with the above embodiments: The process begins with the pretreatment of raw waste materials (piling and drying), followed by the core dry sorting stage. Dry sorting employs a combined process of "two-stage vibrating screening + magnetic separation + two-stage air separation." The material is first fed into the first-stage vibrating composite screen 3 via a plate feeder 2, where it is precisely separated into ultra-large particles (φ>100mm), medium particles (30<φ≤100mm), and fine particles (φ≤30mm, humus). The medium-sized particles, after metal recovery via magnetic separator, then enter the second-stage vibrating composite screen 5 for further classification, yielding aggregates and combustibles of different particle sizes.

[0079] The subsequent secondary air classifier performs air classification on materials with different particle size ranges (60 < φ ≤ 100 mm and 25 ≤ φ ≤ 60 mm), further separating clean aggregates and light combustibles, completing the entire dry separation process and providing qualified medium aggregate raw materials for subsequent wet processing.

[0080] The medium aggregate obtained from dry sorting is transported to the wet processing section. The core equipment, the drum washing device, uses its internal grinding media (natural pebbles), rotational tumbling action, and pressurized water flow to powerfully clean the aggregate, effectively removing the soil, fine particles, and light impurities adhering to its surface, forming a solid-liquid mixture.

[0081] The solid-liquid mixture then enters a multi-stage solid-liquid separation system. The first-stage dewatering screen separates clean aggregate; the undersize material is then separated into coarse and fine particles by a light material removal mechanism, and then enters the second-stage dewatering screen to finally separate recyclable fine sand and muddy wastewater (slurry).

[0082] The generated sludge enters the sludge-water separation system. In the flocculation tank, chemicals are added to achieve initial sludge-water separation. The supernatant enters the recycled water treatment system, while the bottom sludge undergoes deep dewatering via a plate filter press to form sludge cakes for off-site transport. The recycled water, after multi-stage filtration and purification, is pumped back to the drum washing device for recycling, forming a closed-loop water circulation system.

[0083] Ultimately, all combustible components, aggregates, and humus obtained from dry separation, as well as clean aggregates and fine sand obtained from wet processing, are output as resources, realizing the whole-process processing and recycling of materials.

[0084] The waste dry and wet parallel treatment process described in this embodiment, through the organic combination of dry sorting and wet washing, and the integration of efficient multi-stage solid-liquid separation and sludge treatment technologies, exhibits the following significant comprehensive advantages: The combined dry separation (vibrating screen, magnetic separation, and air separation) achieves precise material grading and efficient separation of impurities; the subsequent wet washing thoroughly removes the adhering impurities on the surface of the aggregate, resulting in a significant improvement in the cleanliness of the final aggregate, the purity of the fine sand, and the quality of various recycled materials.

[0085] The vibrating composite screen adopts a segmented adjustable bar layer 31 design, which effectively solves the technical problem of easy clogging of materials with high moisture content, ensures the continuous and stable operation of the system under harsh working conditions, and reduces downtime and manual cleaning intensity.

[0086] One of the core technologies, the closed-loop water circulation system, treats the clean water generated from mud-water separation and reuses it entirely in the rinsing process, greatly reducing the consumption of fresh water and the discharge of wastewater, resulting in significant environmental and economic benefits.

[0087] In summary, this process successfully overcomes the bottlenecks encountered by traditional waste treatment technologies in dealing with high-moisture and highly adhesive materials, providing a complete solution that is efficient, environmentally friendly, and highly resource-efficient.

[0088] Please see Figure 8 As shown, this is Embodiment 2 of the present invention. The dry sorting process in the parallel dry and wet waste treatment process of the present invention adopts a combination of "first-stage vibrating screen + second-stage drum screen + second-stage air separation", while the wet treatment process is the same as that in Embodiment 1.

[0089] Specifically, in this embodiment, the raw waste material after drying is first conveyed to the first-stage vibrating composite screen 3 by the plate feeder 2. The vibrating screen adopts the same composite structure of bar layer 31 and screen layer 32 as in Embodiment 1, which initially separates the material into: the first layer of oversize material (φ>100mm) is sent to manual sorting, the second layer of undersize material (φ≤30mm) is used as humus, and the second layer of oversize material (30<φ≤100mm) enters the subsequent drum screening process.

[0090] The two-stage drum screening system consists of two drum screens connected in series. For example, the first-stage drum screen 91 has a diameter of 2.2 meters, a length of 6 meters, a screen mesh size of 60 mm, an inclination angle of 5 degrees, and a rotation speed of 12 rpm. It is specifically designed to process materials of 30-100 mm, separating them into two particle sizes: 60-100 mm and 30-60 mm. The second-stage drum screen 92 has a diameter of 1.8 meters, a length of 5 meters, a screen mesh size of 25 mm, an inclination angle of 5 degrees, and a rotation speed of 15 rpm. It further classifies the 30-60 mm material, obtaining aggregates larger than 25 mm (mainly 25-60 mm) and humus with a particle size ≤25 mm. Each drum screen's inner wall is equipped with lifting plates and wear-resistant liners to ensure thorough tumbling and dispersion of the material.

[0091] Specifically, the secondary air separation process maintains the same configuration as in Example 1, processing materials in two particle sizes: 60-100mm and 25-60mm, respectively. The first-stage air separator 6 adopts a horizontal structure to process the 60-100mm material obtained from the first-stage drum screen 91; the second-stage air separator 7 also adopts a horizontal structure to process the 25-60mm material obtained from the second-stage drum screen 92, achieving effective separation of aggregates and lightweight impurities through precise air velocity control.

[0092] Specifically, in this second embodiment, the dry separation process adopts a combined flow of "first-stage vibrating composite screen + second-stage drum screen + second-stage air classifier". The core of this process is that before the material enters the drum screen, it first passes through the first-stage vibrating composite screen 3, which is specially designed to treat wet and sticky materials.

[0093] The pre-treated raw waste material is first conveyed to the first-stage vibrating composite screen 3 via a plate feeder 2. This vibrating screen adopts the same adjustable-angle bar layer 31 design as in Example 1. For highly wet and sticky materials, the operator can increase the angle of the front bars (e.g., 35-40 degrees), utilizing their large gaps and steep inclination angles to forcefully break, disperse, and initially screen the clumps of wet and sticky material under the action of vibration and gravity. This effectively removes most of the soil and fine particles adhering to the surface of the material, allowing them to be separated as the second layer of undersize material (humus soil with a diameter ≤ 30mm) in advance.

[0094] After this crucial pretreatment, the moisture content and viscosity of the material obtained from the second-stage sieve (30 < φ ≤ 100 mm) are significantly reduced, making it more suitable for subsequent drum screen processing. This material is then fed into the first-stage drum screen 91 (60 mm aperture) to separate materials of 60-100 mm. This particle size range then enters the second-stage drum screen 92 (25 mm aperture) for further fine screening to remove aggregates of 25-60 mm. The subsequent secondary air classification process is the same as in Example 1, separating the lighter materials from these two particle sizes.

[0095] The core advantage of this solution is the use of a pre-positioned adjustable vibrating composite screen as a pretreatment unit for "breaking adhesion and dehydration". It effectively breaks up material clumps through mechanical force and removes a large number of fine particles that cause adhesion, fundamentally alleviating the risk of clogging of the subsequent drum screen.

[0096] After pretreatment by the vibrating screen, the material becomes loose. At this point, the advantages of the drum screen—large processing capacity, gentle screening, and minimal wear on the material—are utilized to efficiently and accurately classify medium-sized materials. The synergy of the two overcomes the problem of reduced performance of a pure vibrating screen under extreme conditions and avoids the clogging defects of a drum screen directly processing raw, wet, sticky materials.

[0097] This combined process provides another effective technical route for treating high-moisture, high-viscosity waste under special conditions such as the rainy season in South China, enhancing the overall responsiveness and adaptability of waste treatment projects.

[0098] The rest of this embodiment is the same as that in Embodiment 1. Features not explained in this embodiment are explained using the methods in Embodiment 1, and will not be repeated here.

[0099] In another embodiment, please combine Figure 10 As shown in the accompanying figure, this invention illustrates the complete and continuous process path and the connection relationships between equipment in the wet processing section during engineering applications. This embodiment is consistent with the aforementioned embodiments in its overall technical concept, but it presents the equipment configuration, connection methods, material flow, and water circulation route of the wet system in a more intuitive and systematic way, enabling those skilled in the art to directly build the corresponding system based on the illustrated layout.

[0100] As shown in the attached diagram, the medium aggregate obtained from dry sorting is first stably fed to the subsequent conveyor via a bin feeder. At the end of the conveyor, the material is continuously and equally fed into the mixing feeder. The main function of the mixing feeder is to pre-wet and initially disaggregate the incoming aggregate. Its internal mixing shaft, with the participation of water, causes some of the attached mud film to disintegrate in advance, thereby reducing the load on the drum washing device.

[0101] Specifically, the outlet of the mixing feeder is directly opposite the inlet of the drum washing device. The drum washing device adopts a long cylindrical structure (i.e., the scrubbing machine shown in the figure). The inside of the cylinder is equipped with lifting plates and guide holes, and pebbles or wear-resistant blocks can be added as needed to apply rolling, friction, tumbling and centrifugal impact to the aggregate, so that the mud, attached fine particles and light materials on the surface of the aggregate can be fully stripped off, forming a solid-liquid mixture flow with the washing water.

[0102] A chute controlling the flow rate is installed at the drum outlet, guiding the mixture flow into the primary hydraulic vibrating screen. The primary vibrating screen functions as both a hydraulic classifier and a coarse screen; the oversize material is directly output as primary clean aggregate (sand and gravel aggregate) via a conveyor, while the undersize material flows into the primary mud buffer tank. The primary mud buffer tank is an open-type settling and flow stabilization device, equipped with an internal stirring paddle to suppress the sedimentation of large particles, thus maintaining a uniform concentration of the mud-water mixture.

[0103] The buffer tank outlet is stably pumped to the high-efficiency classification module (similar to the classification screw conveyor in Example 1). This module uses parallel-arranged multi-layer classification plates or corrugated inclined plates. By changing the flow direction and increasing the effective settling area, it further separates settling particles, thereby improving the efficiency of subsequent fine screening. The classification overflow of this module enters the upper inlet of the secondary washing screen through a pipeline.

[0104] The secondary vibrating screen employs a hydraulic vibrating screen structure with a spray device to further screen and wash the secondary mud-water mixture. The oversize material, consisting of fine aggregate or fine sand, is collected and stored via a conveyor, while the undersize material enters the secondary mud buffer tank. The secondary mud buffer tank is similar to the primary tank, but due to its finer particle size, its bottom discharge port is connected to a gravel pump for continuously feeding high-concentration mud-water into the flocculation reaction system. The two mud buffer tanks can operate independently or be configured in parallel to adapt to engineering scenarios with different processing capacities.

[0105] The water circulation system of the wet scrubbing system consists of a water tank, a reaction tank, a sedimentation zone, and a filter press system, forming a closed-loop structure. The water tank serves as a regulating tank for clean water replenishment and reuse, and its effluent is pumped through pipelines to the water filling points of the drum flushing device and the mixing feeder, thus achieving overall water supply for the wet scrubbing production line.

[0106] In this embodiment, the advanced treatment of the sludge begins in the reaction tank, which is sequentially divided into a rapid reaction zone and a slow flocculation zone. In the rapid reaction zone, the added flocculant is precisely metered by a dosing machine and then mixed uniformly at high speed by a stirring paddle, effectively neutralizing the surface charge of the fine particles. The sludge then flows into the slow flocculation zone, where low-speed stirring causes the fine particles to form flocs. The effluent from the reaction tank flows naturally into a sedimentation tank, where multiple conical sludge hoppers at the bottom collect the settled sludge.

[0107] The sludge at the bottom of the sedimentation tank is continuously pumped into the filter press system by a sludge discharge screw pump. The filter press adopts a plate and frame structure, consisting of a sludge storage tank, a feed pump, a filter chamber, filter plate assemblies, filter cloth, and an automatic cake discharge mechanism. The sludge cake obtained from the filter press is output by a conveyor and stored as the final solid waste, while the filtrate flows back to the water tank through pipelines and is reused as recycled water in the wet washing section, realizing a closed-loop circulation of the system.

[0108] The supernatant from the sedimentation tank is also piped back to the water tank, forming a circulating water supply. To further improve the quality of the reclaimed water, a high-efficiency clarification device can be connected to the overflow end of the sedimentation tank to deeply remove fine suspended solids, ensuring that the reclaimed water maintains stable quality during circulation.

[0109] Through append Figure 10 As can be seen, the wet system in this embodiment adopts a series of multi-stage processes: "drum washing - two-stage grading and dewatering - two-stage mud buffering - flocculation sedimentation - pressure filtration dewatering - recycled water replenishment". The modules are connected by pipelines, chutes, conveyors and pumping equipment to achieve seamless connection of materials and water flow, forming a continuous production system from cleaning to solid-liquid separation and water circulation.

[0110] The entire system is arranged linearly according to the direction of material movement, or it can be arranged in a broken line according to site conditions, but the process logic is completely consistent. That is, the material is first thoroughly separated by a drum, and then the usable aggregate and fine sand are separated step by step by a grading screen and a washing screen. At the same time, a mud stabilization zone is set up to ensure the consistency of mud and water before flocculation reaction. Finally, the solid mud cake and reusable clean water are separated through flocculation sedimentation and a filter press.

[0111] This implementation method forms a continuous process link between drum washing, coarse screening, fine screening, grading module, two-stage mud buffer tank, and mud-water treatment system, realizing the step-by-step separation of materials from coarse to fine and from solid to liquid. The two-stage buffer tank ensures the stability of mud-water flow quality and improves the efficiency of flocculation and sedimentation. The high-efficiency grading module enhances the desorption of fine particles and the recovery of fine sand. The water tank-reaction tank-sedimentation tank-filter press system constitutes a mature and stable closed-loop circulation structure, which allows the clean water to be completely reused for washing and transportation, thereby reducing the amount of external water replenishment. The overall layout has strong continuity, low probability of clogging, and convenient on-site maintenance. It is suitable for continuous and large-scale treatment of garbage and construction waste in high moisture content or rainy season environments, significantly improving the reliability, processing capacity, and resource recovery level of the wet treatment section.

[0112] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A parallel dry and wet waste treatment process, characterized in that, Includes the following steps: S1, pre-treat the raw waste material, and process the pre-treated raw waste material through a dry sorting process to obtain multiple particle size materials. The dry sorting process includes at least two of the following: vibrating screen, drum screen, magnetic separation, and air separation. The multiple particle size materials include combustible components, usable aggregates, fine particles, and medium aggregates. S2, introduce the medium aggregate and / or materials suitable for wet processing in the dry sorting process into the wet processing process, and separate the mud, fine particles and light impurities attached to the surface of the medium aggregate through the wet washing step to form a solid-liquid mixture. S21, the solid-liquid mixture obtained in step S2 is subjected to multi-stage solid-liquid separation treatment to obtain usable aggregate, recyclable fine sand and mud. S22, The mud is subjected to mud-water separation treatment to obtain a dischargeable or recyclable cleaning liquid and solid mud cake. S3, the combustible components, usable aggregates and fine particulate materials obtained from the dry sorting process are output as resources or further processed, and the recyclable cleaning liquid obtained from step S22 is returned to the wet rinsing step of step S2 for recycling, forming a closed-loop water resource recycling system under the condition of dry and wet parallel operation.

2. The waste dry and wet parallel treatment process according to claim 1, characterized in that, In step S1, the vibrating screen in the dry sorting process is a two-stage vibrating screen using a composite vibrating screen. The secondary vibrating screening includes the following steps: S11, using an excavator (1) to transfer the pre-treated raw waste material to a plate feeder (2), the plate feeder (2) transfers the raw waste material fed by the excavator (1) to a first-stage vibrating composite screen (3) for screening to obtain a first layer of oversize material, a second layer of undersize material and a second layer of oversize material. S12, the material on the second sieve is transferred to a magnetic separator for magnetic separation, and the magnetic separator processes the material on the second sieve to obtain recyclable metal and the first material; S13, the first material is transferred to the second-stage vibrating composite screen (5) for screening to obtain a first layer of oversize material, a second layer of oversize material and a second layer of undersize material; S14, the layer of material obtained from the second-stage vibrating composite screen (5) in step S13 is transferred to the light material sorting machine, and the first combustible material and the second material are separated by the light material sorting machine.

3. The waste dry and wet parallel treatment process according to claim 2, characterized in that, The air separation in the dry separation process is at least a two-stage air separation, and the two-stage separation includes the following steps: S15, the second material obtained in step S14 is transferred to the first-stage air classifier (6) for air classification to obtain the first aggregate and the second combustible material; S16, the material obtained from the second-layer screen in step S13 is transferred to the second-stage air classifier (7) for air classification to obtain the second aggregate and the third combustible material.

4. The waste dry and wet parallel treatment process according to claim 3, characterized in that, Both the first aggregate and the second aggregate are medium aggregates. The particle size of the first aggregate is 60 < φ ≤ 100 mm; the particle size of the second aggregate is 25 ≤ φ ≤ 60 mm.

5. The waste dry and wet parallel treatment process according to claim 2, characterized in that, The two layers of undersize material obtained by the first-stage vibrating composite screen (3) and the second-stage vibrating composite screen (5) are both usable humus soil; the particle size of the two layers of undersize material obtained by the first-stage vibrating composite screen (3) is φ≤30mm, and the particle size of the two layers of undersize material obtained by the second-stage vibrating composite screen (5) is φ≤25mm.

6. The waste dry and wet parallel treatment process according to claim 2, characterized in that, The first-stage vibrating composite screen (3) has a bar layer (31) and a screen mesh layer (32) on its screen surface. The screen mesh layer (32) is located below the bar layer (31). The bar layer (31) includes a first mounting member (33) and a plurality of strip-shaped components (34) disposed on the first mounting member (33). The plurality of strip-shaped components (34) are detachably connected to the first mounting member (33) along its length. The first mounting component (33) is provided in multiple sets. The first mounting component (33) is rotatably mounted on the frame (30) of the first-stage vibrating composite screen (3) so that the angle of the bar relative to the screen surface of the screen layer (32) is adjustable. Multiple sets of first mounting components (33) with multiple strip-shaped parts (34) are installed in a gradient to form an inclined first screening section, and the screen layer (32) is inclined to form a second screening section.

7. The waste dry and wet parallel treatment process according to claim 1, characterized in that, The wet rinsing step in step S2 includes: S20, the medium aggregate from step S1 is transferred to the drum washing device, and the drum washing device applies rolling, washing, friction and centrifugal turning action to the medium aggregate so as to separate the mud, fine particles and light impurities in the medium aggregate to obtain a solid-liquid mixture; the drum washing device is equipped with rolling stone bodies and / or wear-resistant blocks inside.

8. The waste dry and wet parallel treatment process according to claim 1, characterized in that, The multi-stage solid-liquid separation in step S21 includes the following steps: S211, the solid-liquid mixture is fed into the first-stage dewatering screen for preliminary solid-liquid separation to obtain the first-stage oversize and the first-stage undersize. The first-stage oversize is output as usable aggregate and temporarily stored. The first-stage undersize is transferred to the second-stage dewatering screen using a pumping device. S212, the primary undersize obtained in step S211 is processed by the second-stage dewatering screen to obtain the secondary oversize and secondary undersize. The secondary oversize is output as recyclable fine sand, and the secondary undersize is transferred as slurry to the mud-water separation process.

9. The waste dry and wet parallel treatment process according to claim 7, characterized in that, The mud-water separation in step S22 includes the following steps: S221, the mud obtained in step S21 is transported to the flocculation tank for mud-water separation to obtain mud and recycled water; S222, the mud is transported to a filter press for deep solid-liquid separation to obtain solid mud blocks and water. The solid mud blocks are recycled, and the water is mixed with recycled water and then transported to the drum washing device in step S20 as a cleaning liquid for reuse.

10. The waste dry and wet parallel treatment process according to claim 8, characterized in that, Step S211 further includes the following steps: S2111, the first-stage undersize material of the first-stage dewatering screen is pushed to the light material removal mechanism by a water flow propulsion device. The light material removal mechanism is a scraper type or flotation type structure. The light material removal mechanism is used to remove light floating matter of the first-stage undersize material. S2112, downstream of the light material rejection mechanism is a graded inclined screw conveyor and a graded straight screw conveyor, which are used to carry out sedimentation and stratification conveying of the first-stage undersize material after the light material rejection mechanism has removed the light floating matter, so that the coarser and finer particles of the first-stage undersize material enter the second-stage dewatering screen in sequence.

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