A hazardous waste rigid landfilling method

Abstract

This invention relates to the field of hazardous waste landfill technology, specifically to a method for rigid landfilling of hazardous waste. The method includes the following steps: pre-treating the material to be landfilled into loose material and compressed material, packaging them to obtain bagged loose material and bagged compressed material respectively; lifting and transporting the bagged loose material and bagged compressed material to the transfer platform of a transfer unit; moving the transfer platform to the receiving point of the landfill operation unit, and moving the bagged material from the transfer platform to the material storage area; using the landfill operation unit to transport the bagged loose material and bagged compressed material from the material storage area to a designated landing point in a designated landfill area; repeating the above steps to complete the stacking of the bagged compressed material in the landfill area, using the loose material in the bagged loose material to fill the gaps after stacking, and compacting the entire landfill area to complete the landfilling. This invention improves operational efficiency, increases stacking density, and enhances the utilization rate of rigid landfill capacity.

Description

Technical Field

[0001] This invention relates to the field of hazardous waste landfill technology, specifically to a rigid landfill method for hazardous waste. Background Technology

[0002] Currently, hazardous waste is disposed of using rigid landfills. The main structure of a rigid landfill consists of unit pools, each protected by HDPE membranes for seepage prevention. Subsequent sealing uses precast concrete slabs. A visual inspection layer is installed at the bottom of each unit pool, and mobile canopies and hoisting equipment are installed above them. Landfill materials that meet the entry requirements are transported by vehicles to the hazardous waste lifting point, where they are lifted by crane to the unit pools for unloading. The landfill materials are then stacked in layers. The common methods for landfilling waste include using gantry cranes for lifting and hoisting within the plantation outside the rigid landfill. However, existing rigid landfill operations rely on mechanical equipment for the transfer and disposal of hazardous waste. The mainstream equipment is single-span or multi-span overhead cranes, which present the following problems in actual operation: First, when using cranes to transfer hazardous waste, the crane needs to rotate smoothly during the entire transfer process to prevent the hazardous waste from falling, which slows down the crane and results in low efficiency in transferring hazardous waste, failing to meet operational requirements. Second, there are blind spots in the operation, and the low landfill density leads to low capacity utilization. For example, application number CN113894134A, entitled "A Hazardous Waste Landfill Operation Unit and Method," describes an operation system comprising: a stamping and forming device for stamping hazardous waste material into pre-formed blocks; and a stacking device for stacking the pre-formed blocks within a rigid landfill cell. While this system and method can improve the capacity utilization of rigid landfills to some extent, the sharp edges of the briquetted material after briquetting can easily damage the impermeable layer, resulting in uneven stress distribution within the landfill cells and potential structural safety hazards. Summary of the Invention

[0003] To address the problems of existing technologies, this invention provides a method for rigid landfilling of hazardous waste, comprising the following steps: S1, the material to be landfilled is pre-treated into loose material and compressed material, and then packaged to obtain bagged loose material and bagged compressed material respectively; S2, the bagged loose material and bagged compressed material are lifted and transported to the transfer conveying platform of the transfer conveying unit by a fixed lifting device; S3, move the transfer and conveying platform to the receiving point of the landfill operation unit, and move the bagged loose material and bagged compressed material from the transfer and conveying platform to the material storage area of ​​the landfill operation unit; S4, using the landfill operation unit to transport the bagged loose material and bagged compressed material from the material storage area to the designated landing point in the designated landfill area; S5, repeat steps S2-S4 to complete the stacking of the bagged compressed material in the landfill area, use the loose material in the bagged loose material to fill the gaps after stacking, and use the vibration compaction unit to compact the entire landfill area to complete the landfilling.

[0004] Furthermore, the method for defining the designated landing points is as follows: the landfill area is divided into several grid landfill units, and each grid landfill unit serves as a landing point for material landfilling operations.

[0005] Furthermore, the stacking rules are layered stacking, staggered stacking, or slope control; Layered stacking: Layering bagged materials; Staggered stacking: The alternating stacking of two adjacent layers of bagged materials; Slope control ensures that the slope of the stacked structure is adapted to the slope of the landfill area.

[0006] Furthermore, the loose material in the bagged loose material is used to fill the gaps after stacking. Specifically, whenever the stacking height reaches a preset height, the pre-stacked bagged loose material is stacked at the top of the landfill area, and then the bagged loose material at the top of the landfill area is broken, so that the loose material spills into the gaps formed by the stacking.

[0007] Furthermore, the compaction operation is as follows: Obtain stack gap parameters, which include gap width data and depth data formed by stacking. Based on the filling and compaction density requirements, fit the stack gap parameters and the particle size data of the loose material with the filling and compaction density to obtain compaction parameters. Based on the aforementioned compaction parameters, a vibratory compaction unit is used to control the vibration frequency, amplitude, and compaction speed to compact the landfill area.

[0008] Furthermore, the pretreatment includes: firstly, crushing the material to be landfilled into small pieces of 10-15 cm using a crushing device, then crushing the 10-15 cm pieces into 1-2 mm loose material using a crusher and outputting it according to the specifications. Loose material that meets the specifications is bagged and packaged into bagged material, while loose material that does not meet the specifications is sent to a mixing and stirring device. Dosing agents and excipients are added to the mixing and stirring device through a dosing system and an excipient addition system for mixing and stirring. After the reaction, the loose material is compressed into blocks and bagged into bagged compressed material using a hydraulic compaction device for transfer to the designated landfill area of ​​the landfill for landfilling.

[0009] Furthermore, the transfer and conveying unit includes a transfer track and a transfer and conveying platform laid between the fixed lifting device and the receiving point of the landfill operation unit, and the transfer and conveying platform moves on the transfer track; The transfer and conveying platform is equipped with a stationary turning device at its bottom, which is used to switch tracks in different directions, enabling the transfer and conveying platform to turn in place and achieve track switching and turning.

[0010] Furthermore, the in-situ turning device includes a lifting device at the bottom of the transfer conveyor platform and a rotating device mounted on the track wheels at the bottom of the transfer conveyor platform; The lifting device includes a locking part and a lifting part. The lifting part is connected to the bottom of the transfer conveying platform, and the locking part is connected to the lifting part. The lifting part drives the locking part to move towards the track. The locking part is used to lock onto the track to fix the relative position of the transfer conveying platform. The rotating device is used to drive the track wheel to rotate relative to the transfer conveyor platform, so that the transfer conveyor platform can rotate along the track. Furthermore, the rotating device includes a steering drive structure installed at the bottom of the transfer conveying platform, and a first helical gear is installed at the output end of the steering drive structure; A second helical gear is fitted onto the mounting part of the track wheel. The first helical gear and the second helical gear mesh, and the meshing directions of the first helical gear and the second helical gear are perpendicular to each other. The rotation of the first helical gear and the second helical gear is driven by the steering drive structure to turn the track wheel.

[0011] Furthermore, the locking portion includes a locking claw; The top of the claw is connected to the lifting part, the bottom of the claw is provided with a slot, and the side of the claw is provided with a through slot. The through slot communicates with the slot, and a clamping block is rotatably installed in the through slot. When the track enters the slot, the track is clamped between the inner wall of the slot and the clamping block by the rotation of the clamping block. The bottom of the transfer conveying platform is equipped with a snap-fit ​​drive structure, which includes a first drive structure and a linkage rod structure installed at the drive end of the first drive structure. The first drive structure is connected to the bottom of the transfer conveying platform, and the first drive structure drives the clamping block to rotate through the linkage rod structure via telescopic movement. The linkage structure includes a U-shaped connector, the open end of which is rotatably connected to one end of the rail clamping rod, and the end of the U-shaped connector opposite to its open end is connected to the driving end of the first driving structure; the other end of the rail clamping rod is rotatably connected to the clamping block.

[0012] The beneficial effects of this invention are: This invention addresses the problems of high risk, low density, and high operating cost associated with manual operations by combining a pretreatment unit, a fixed lifting device, a transfer and conveying unit, a landfill operation unit, and a vibration compaction unit. It improves operational efficiency, reduces landfill operating costs by 50%, increases density by 10%, and enhances the utilization rate of rigid landfill capacity. This invention has significant practical implications for the safe and efficient disposal of rigid landfill materials. Attached Figure Description

[0013] Figure 1 A flowchart of a rigid landfill method for hazardous waste provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the fixed lifting device structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the transfer and conveying unit structure provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the in-situ steering device provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the installation of the landfill operation unit and the vibration compaction unit according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the rotating component structure provided in an embodiment of the present invention. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figure 1-6 The present invention provides a method for rigid landfilling of hazardous waste, comprising the following steps: S1, pre-treating the material to be landfilled into loose material and compressed material, and packaging it to obtain bagged loose material and bagged compressed material respectively; S2, the bagged loose material and bagged compressed material are lifted and transported to the transfer conveying platform of the transfer conveying unit by a fixed lifting device; S3, move the transfer and conveying platform to the receiving point of the landfill operation unit, and move the bagged loose material and bagged compressed material from the transfer and conveying platform to the material storage area of ​​the landfill operation unit; S4, using the landfill operation unit to transport the bagged loose material and bagged compressed material from the material storage area to the designated landing point in the designated landfill area; S5, repeat steps S2-S4 to complete the stacking of the bagged compressed material in the landfill area, use the loose material in the bagged loose material to fill the gaps after stacking, and use the vibration compaction unit to compact the entire landfill area to complete the landfilling. The method for dividing the designated landing points is as follows: the landfill area is divided into several grid landfill units, and each grid landfill unit serves as a landing point for material landfilling operations.

[0016] The stacking rules are layered stacking, staggered stacking, and slope control; Layered stacking: Bagged materials are stacked in layers to reduce gaps between materials and reduce leachate generation; Staggered stacking: The staggered stacking of two adjacent layers of bagged material is used to enhance the overall stability of the stack and prevent the material from sliding or collapsing during landfilling. Slope control is used to adjust the slope of the stacked structure to match the slope of the landfill area in order to prevent materials from sliding under gravity.

[0017] Specifically, the method involves using loose material from bagged bulk materials to fill the gaps after stacking. Whenever the stacking height reaches the preset height, the pre-stacked bagged loose material is stacked at the top of the landfill area, and then the bagged loose material at the top of the landfill area is broken, so that the loose material spills into the gaps formed by the stacking.

[0018] The compaction operation includes: acquiring stacking gap parameters, which include gap width and depth data formed by stacking; fitting the stacking gap parameters and the particle size data of the loose material to the filling compaction density based on the filling compaction density requirements to obtain compaction parameters; and compacting the landfill area using a vibratory compaction unit based on the compaction parameters. It should be noted that the gap width data is determined by the size, shape, and stacking method of the bagged material. In actual operation, the gap width varies depending on the material. To obtain accurate gap width data, actual measurements can be taken on-site or estimated through simulation experiments. The gap depth data is related to the overall design height of the landfill area, the number of stacking layers, and the height of each stack. The gap depth data is determined through on-site measurements. For loose materials with a size of 1-2mm, the landfill area is compacted by controlling the vibration frequency, amplitude, and compaction speed using a vibratory compaction unit, thereby controlling the compaction density.

[0019] The pretreatment includes: first, crushing the material to be landfilled into small pieces of 10-15 cm using a crushing device; then, crushing the 10-15 cm pieces into 1-2 mm loose material using a crusher and outputting it according to specifications; the loose material that meets the specifications is bagged and packaged into bagged loose material; the loose material that does not meet the specifications is sent to a mixing and stirring device, where dosing agents and excipients are added to the mixing and stirring device through a dosing system and an excipient addition system for mixing and stirring; after reaction, the loose material is compressed into blocks and bagged into bagged compressed material using a hydraulic compaction device for transfer to the designated landfill area of ​​the landfill for landfilling.

[0020] The transfer and conveying unit includes a transfer track and a transfer and conveying platform laid between the fixed lifting device and the receiving point of the landfill operation unit, and the transfer and conveying platform is capable of moving on the transfer track; The bottom of the transfer and conveying platform is equipped with a stationary turning device, which is used to switch tracks in different directions, so that the transfer and conveying platform can turn in place without rotating, thereby realizing track switching and turning. It should be noted that the rigid landfill method for hazardous waste involves pre-treating the large bags of materials that need to be crushed to obtain loose materials. The loose materials that meet the standards are then bagged and packaged into bagged materials, or briquette-packed and bagged into compressed materials, which are then transferred to the designated landfill area of ​​the landfill for landfilling. First, the large bags of material requiring crushing are lifted into the bag-breaking and crushing device using an electric hoist, and then the inlet of the device is closed. The electric bag-breaking device breaks the bags, and the material enters the receiving port of the crushing device through the bottom conical discharge port. Mechanical crushing breaks the material into small pieces of 10-15 cm. Since the bag-breaking and crushing process generates a large amount of dust, the device is equipped with a dust collector to collect and treat the dust, ensuring that exhaust emissions meet standards. Second, the discharge port of the crushing device is connected to the receiving port of the crusher, further crushing the 10-15 cm pieces into loose material of 1-2 mm. A bypass is provided at the crusher's discharge port. If the material's testing and analysis indicators are normal, it can be directly re-bagged via the bypass and used as bottom material or seam filler. Alternatively, it can be directly compressed into blocks by the hydraulic compaction device and then transferred to landfill disposal. This setup plays an important practical role in dealing with material complexity and improving production flexibility. Loose materials that do not meet the standards are fed into a mixing and stirring device. At the same time, dosing agents and excipients are added through a dosing system and an excipient addition system for mixing and stirring. After the reaction, the loose materials are compressed into bags by a hydraulic compaction device. The bagged compressed materials are then transferred to the landfill loading area for landfilling. When material testing and analysis indicators show abnormalities, 1-2mm loose material is lifted to the receiving port of the mixing and stirring device via an elevator. After adding reagents and excipients through the configured dosing and excipient addition systems, the mixture undergoes a mixing reaction. The reaction time is controlled at 20-40 minutes. Dust is easily generated during the mixing process; the mixing device is equipped with a dust collector to capture dust in the exhaust gas and ensure it meets emission standards. The discharge port of the mixing and stirring device is directly connected to the square receiving device (made of stainless steel) of the hydraulic compaction device. After the material is full, the hydraulic compaction device is activated to compact the loose material in the square receiving device. Once the compaction limit is reached, the hydraulic compaction device automatically retracts. Generally, the bulk density of the material after compaction can reach 1200 kg / m³. 3 After the first compaction, the discharge gate valve of the mixing device needs to be opened electrically again to replenish the material to the square receiving device. The material compacted by the hydraulic compaction device is then bagged and packaged, and then transferred to the landfill loading area using forklifts and dump trucks. To ensure that the loading area is not contaminated and leaks, impermeable material is laid in the landfill operation area as a barrier between the material and the ground.

[0021] During landfill operations, the first step involves controlling the belt conveyor mechanism 1 within the fixed lifting device to transport 10-12 bags of material at a time along the vertical track to the working plane of the transfer conveyor unit. Then, the transfer conveyor platform of the transfer conveyor unit is controlled to drive the horizontal belt conveyor mechanism 2 along the working track to the receiving point of the transfer conveyor unit, so that the horizontal belt conveyor mechanism 2 docks with the horizontal belt conveyor platform 1 of the fixed lifting device. Finally, the horizontal belt conveyor platform 1 of the fixed lifting device is controlled to transfer the bagged material it carries onto the horizontal belt conveyor mechanism 2 of the transfer conveyor unit. It should be noted that the fixed lifting device can transport 10-12 bags of material at a time, which is significantly more efficient than the traditional overhead crane, which can only lift a maximum of 2 bags at a time. Compared to the traditional overhead crane, it eliminates the time spent on the work platform repositioning materials, greatly shortening the operation time. Furthermore, while the traditional overhead crane can only carry 4 bags of material at a time during a transfer, the transfer platform can carry 10-12 bags and can automatically connect with the landfill platform, greatly improving operational efficiency. Using the disposal of 40,000 tons of hazardous waste as a comparison, the disposal cost of the new rigid landfill technology is approximately 7.3 yuan / ton (including labor, electricity, equipment depreciation, and civil engineering costs), while the disposal cost of the traditional overhead crane is approximately 15.7 yuan / ton (including labor, electricity, equipment depreciation, and civil engineering costs). The new rigid landfill technology reduces operating costs by 50% compared to the traditional overhead crane landfill technology. The new landfill technology has twice the work efficiency per unit time of the traditional overhead crane, completing the landfilling of one bag of material in an average of 4 minutes.

[0022] The fixed lifting device includes a steel structure frame, a winch hoist, a vertical track, and a belt conveyor mechanism. The winch hoist is installed on the top of the steel structure frame, and the vertical track and belt conveyor mechanism are installed inside the steel structure frame. The belt conveyor mechanism is installed at the bottom of the vertical track. The hoist lifts 10-12 bags of loose or compressed bagged materials at a time; the belt conveyor is a belt conveyor mechanism that moves along a vertical track via the hoist lift, transporting the loose or compressed bagged materials from the ground to the working plane of the transfer conveyor unit; due to the use of fixed lifting and feeding, operational safety is greatly improved. The transfer conveying unit includes a working track and a transfer conveying platform. A second belt-type horizontal conveyor mechanism is installed on the transfer conveying platform, and four in-situ turning devices are installed at the bottom of the platform. These devices control the platform to change direction by clamping the rails and using longitudinal supports, enabling flexible track switching between the transfer conveying unit and the landfill operation unit. The transfer conveying platform is located on the working track and drives the second belt-type horizontal conveyor mechanism to perform linear reciprocating motion along the track. This allows the second belt-type horizontal conveyor mechanism to move to the receiving point of the transfer conveying unit and connect with the first belt-type horizontal conveyor mechanism, receiving bagged loose materials or bagged compressed materials conveyed by the first belt-type horizontal conveyor mechanism. The bagged loose materials or bagged compressed materials are then transported to the landfill operation unit via the second belt-type horizontal conveyor mechanism. The in-situ turning device includes a lifting device at the bottom of the transfer conveyor platform and a rotating device set on the track wheels at the bottom of the transfer conveyor platform; The lifting device includes a locking part and a lifting part. The lifting part is connected to the bottom of the transfer conveying platform, and the locking part is connected to the lifting part. The lifting part drives the locking part to move towards the track. The locking part is used to lock onto the track to fix the relative position of the transfer conveying platform. The rotating device is used to drive the track wheel to rotate relative to the transfer conveyor platform, so that the transfer conveyor platform can rotate along the track. Furthermore, the rotating device includes a steering drive structure installed at the bottom of the transfer conveying platform, and a first helical gear is installed at the output end of the steering drive structure; A second helical gear is fitted onto the mounting part of the track wheel. The first helical gear and the second helical gear mesh, and the meshing directions of the first helical gear and the second helical gear are perpendicular to each other. The rotation of the first helical gear and the second helical gear is driven by the steering drive structure to turn the track wheel.

[0023] Furthermore, the locking portion includes a locking claw; The top of the claw is connected to the lifting part, the bottom of the claw is provided with a slot, and the side of the claw is provided with a through slot. The through slot communicates with the slot, and a clamping block is rotatably installed in the through slot. When the track enters the slot, the track is clamped between the inner wall of the slot and the clamping block by the rotation of the clamping block. The bottom of the transfer conveying platform is equipped with a snap-fit ​​drive structure, which includes a first drive structure and a linkage rod structure installed at the drive end of the first drive structure. The first drive structure is connected to the bottom of the transfer conveying platform, and the first drive structure drives the clamping block to rotate through the linkage rod structure via telescopic movement. The linkage structure includes a U-shaped connector, the open end of which is rotatably connected to one end of the rail clamping rod, and the end of the U-shaped connector opposite to its open end is connected to the driving end of the first driving structure; the other end of the rail clamping rod is rotatably connected to the clamping block.

[0024] The first drive structure is an electric cylinder or an electric telescopic rod, and the clamping block has an arc-shaped surface that conforms to the shape of the outer side of the track on the side facing the slot; the steering drive structure is a motor; and the lifting part is an electric cylinder or an electric telescopic rod. Firstly, after the materials are transferred to the loading area of ​​the fixed lifting device, a forklift moves them to the loading platform of the fixed lifting device, which can transfer 10-12 bags of materials at a time. Due to the use of a winch-driven fixed lifting system, operational safety is significantly improved. Both the fixed lifting device and the transfer conveyor unit can carry 10-12 bags of materials at a time, and can transfer 10 bags of ground materials to the transfer conveyor platform in the transfer conveyor unit in an average of 20 minutes. The first horizontal track is equipped with cross-shaped guide rails at all vertical tracks. Through reasonable track laying and modification, as well as the installation of in-situ turning devices in the transfer conveyor unit and landfill operation unit, the transfer conveyor unit and landfill operation unit can be moved flexibly by changing tracks, realizing flexible movement of the transfer conveyor unit and landfill operation unit in the landfill and saving equipment relocation costs.

[0025] The transfer and conveying unit carries materials to the landfill unit for docking. When the transfer and conveying platform needs to change tracks to move to the landfill unit, it moves to the landfill cell equipped with a cross track, precisely and completely covering the cell. Then, the control system executes three commands in sequence: the four in-situ turning devices installed at the bottom of the transfer and conveying platform clamp the rails, the longitudinal supports lift the platform, and the platform's wheels reverse direction. After the track change is completed, it docks with the landfill unit along the track. The transfer and conveying platform with the added in-situ turning devices can move more flexibly between landfills and dock with landfill units in a timely manner, saving the time of repeatedly going back and forth to the landfill loading area to pick up materials, thus improving operational efficiency. The control system drives the belt horizontal conveyor carrying bagged loose materials and bagged compressed materials to the receiving point of the landfill unit via a local turning device. The single-arm operating mechanism of the landfill operation unit places the bagged loose materials and bagged compressed materials conveyed by the transfer and conveying unit into the material storage area. Then, the mobile operating platform of the landfill operation unit is controlled to move to the designated landfill area. After that, the bags are manually hung. The operators in the independent control room control the single-arm operating mechanism to first complete the lifting, hoisting to the designated landfill point, dropping, adjustment and remote unhooking of the loose materials at the bottom of the pile. Then, through the fixed lifting device, the transfer and conveying unit and the landfill operation unit stack the bagged compressed materials for landfill. The bagged loose materials are broken to fill the gaps after landfilling. After the gaps are filled, the vibration compaction unit is used to compact the materials to complete the landfill operation. To ensure operational safety, the bag unhooking system is designed for automatic unhooking. For added convenience, remote unhooking is also available.

[0026] The landfill operation unit includes a landfill operation platform, a single-arm operation mechanism, an independent operating room, and the in-situ turning device installed at the bottom of the mobile operation platform; The single-arm operating mechanism and the independent operating room are set on the landfill operation platform. The landfill operation platform is used to move the single-arm operating mechanism and the independent operating room, and serves as a material storage area for placing bagged loose materials or bagged compressed materials conveyed by the transfer and conveying unit. The independent operating room is used to control the operation of the single-arm operating mechanism. The single-arm operating mechanism is used to place the bagged loose materials or bagged compressed materials conveyed by the transfer and conveying unit into the material storage area and to lift the bagged loose materials or bagged compressed materials to the designated landfill point for landfill operation. The landfill operation unit also includes a control system and a positioning system and a video monitoring system installed on the single-arm operating mechanism, which are used to realize remote control operation and accurate placement of bagged loose materials or bagged compressed materials. This allows operators in an independent control room to control the single-arm operating mechanism to perform corresponding actions through video monitoring and the control system. The control system has automatic, manual and remote control modes, and the appropriate mode can be selected for control adjustment according to the actual site conditions. It should be noted that, considering the need for emergency operations at night, the landfill platform is equipped with platform lighting and auxiliary video monitoring. In addition, the hazardous waste entering rigid landfills has a certain degree of toxicity and volatility, which can endanger the occupational health of workers during landfill operations. Short-term exposure can cause dizziness and nausea, and in hot weather, it can easily lead to fainting and falls. Therefore, the landfill platform is equipped with a separate operating room and air conditioning to avoid direct contact with hazardous waste and ensure safe landfill operations. The method of filling gaps after landfilling by breaking open bagged loose materials includes: lifting bagged loose materials to the designated landfill area, breaking open the bagged loose materials with an electric bag-breaking device, pouring the broken loose materials into the stack of bagged compressed materials for filling gaps, and controlling the vibration compaction unit to vibrate and compact the materials, so that the landfill gaps are filled evenly and the storage capacity is maximized. It should be noted that the landfill operation unit is equipped with a storage capacity management system, which weighs the bagged materials entering the same landfill unit and remotely transmits the information to the storage capacity management software. The software then compiles statistics on the types and weights of materials in each unit, providing data support for the maintenance of rigid landfills and long-term resource utilization.

[0027] The vibration compaction unit includes slings and a vibrating base plate; the landfill operation platform is connected to the vibrating base plate via slings, and a vibration motor is installed on the vibrating base plate. The electrical control system is connected to the vibration motor to control the vibration motor to vibrate and compact loose materials and bagged compressed materials, uniformly fill landfill gaps, maximize the utilization of landfill capacity, and improve landfill density and capacity utilization. Among these technologies, the new combined rigid landfill operation technology can increase the bulk density of landfill waste salts to 1400 kg / m³. 3 The bulk density of waste salt cakes is increased by about 10% when using traditional overhead crane landfill operations.

[0028] It is worth noting that, firstly, by setting up an independent operating room, positioning system, video monitoring system, and control system, remote control operation and precise placement of bagged loose materials and bagged compressed materials are achieved. This allows operators in the independent operating room to control the single-arm operating mechanism to perform corresponding actions via video monitoring and the control system. This reduces the opportunity for operators to come into contact with hazardous waste, lowers the risks of manual operations, and enables unmanned landfill operations, significantly reducing occupational health risks for workers and playing a vital role in improving their occupational health. Secondly, by setting up a fixed lifting device, the construction investment in a rigid landfill loading port can be eliminated, reducing landfill operating costs. Thirdly, both the fixed lifting device and the transfer conveyor unit can carry and transport 10-12 bags of materials at a time, completing the transfer of 10 bags of ground materials to the operating platform in an average of 20 minutes. Compared to traditional overhead cranes that can lift a maximum of two bags of material at a time, this significantly improves material conveying efficiency. Furthermore, the fixed lifting device enhances operational safety through its fixed lifting and feeding mechanism. Fourth, a stationary turning device is installed at the bottom of the transfer conveyor platform. This device, controlled by the clamping rails and longitudinal supports, lifts the platform and reverses direction, enabling flexible track switching between the transfer conveyor unit and the landfill operation unit. This saves on equipment relocation costs and increases operational time. Finally, the addition of a video monitoring and control system to the landfill operation unit facilitates precise material stacking, reduces landfill dead zones, achieves high stacking density, and improves storage capacity utilization.

[0029] Therefore, this invention solves the problems of high risk, low stacking density, and high operating cost of manual operations by combining a pretreatment unit, a fixed lifting device, a transfer and conveying unit, and a landfill operation unit. It improves operation efficiency, reduces landfill operating costs, and enhances the utilization rate and safety of rigid landfill capacity. It has important practical significance for the safe and efficient disposal of rigid landfill materials. It is worth noting that the combined rigid landfill system for hazardous waste used in this invention includes a pretreatment unit, a fixed lifting device, a transfer and conveying unit, a landfill operation unit, and a vibration compaction unit. Compared with traditional landfill operation technologies, the combined rigid landfill system is equipped with an on-site turning device, which improves the mobility and flexibility of the transfer and conveying system; the multi-unit combined operation achieves more than twice the operation efficiency, reduces landfill operating costs by 50%, increases bulk density by 10%, and has better operational safety, truly achieving the goal of safe, efficient, and low-cost landfill operation.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for rigid landfilling of hazardous waste, characterized in that, Includes the following steps: S1, the material to be landfilled is pre-treated into loose material and compressed material, and then packaged to obtain bagged loose material and bagged compressed material respectively; S2, the bagged loose material and bagged compressed material are lifted and transported to the transfer conveying platform of the transfer conveying unit by a fixed lifting device; S3, move the transfer and conveying platform to the receiving point of the landfill operation unit, and move the bagged loose material and bagged compressed material from the transfer and conveying platform to the material storage area of ​​the landfill operation unit; S4, using the landfill operation unit to transport the bagged loose material and bagged compressed material from the material storage area to the designated landing point in the designated landfill area; S5, repeat steps S2-S4 to complete the stacking of the bagged compressed material in the landfill area, use the loose material in the bagged loose material to fill the gaps after stacking, and use the vibration compaction unit to compact the entire landfill area to complete the landfilling. The pretreatment includes: first, crushing the material to be landfilled into small pieces of 10-15 cm using a crushing device; then, crushing the 10-15 cm pieces into 1-2 mm loose material using a crusher and outputting it according to specifications; loose material that meets the specifications is bagged and packaged into bagged loose material; loose material that does not meet the specifications is sent to a mixing and stirring device, where dosing agents and excipients are added to the mixing and stirring device through a dosing system and an excipient addition system for mixing and stirring; after reaction, the loose material is compressed into blocks and bagged into bagged compressed material using a hydraulic compaction device for transfer to the designated landfill area of ​​the landfill for landfilling; The compaction operation is as follows: acquiring stacking gap parameters, which include gap width data and depth data formed by stacking; fitting the stacking gap parameters and the particle size data of the loose material with the filling compaction density based on the filling compaction density requirements to obtain compaction parameters; and using a vibration compaction unit to control the vibration frequency, amplitude, and compaction speed to compact the landfill area based on the compaction parameters.

2. The rigid landfill method for hazardous waste according to claim 1, characterized in that, The method for defining the designated landing points is as follows: the landfill area is divided into several grid landfill units, and each grid landfill unit serves as a landing point for material landfilling operations.

3. The method for rigid landfilling of hazardous waste according to claim 1, characterized in that, The stacking rules are layered stacking, staggered stacking, or slope control; Layered stacking: Layering bagged materials; Staggered stacking: The alternating stacking of two adjacent layers of bagged materials; Slope control ensures that the slope of the stacked structure is adapted to the slope of the landfill area.

4. The method for rigid landfilling of hazardous waste according to claim 1, characterized in that, The gaps between stacked materials are filled with loose material from bagged bulk materials, specifically: Whenever the stacking height reaches the preset height, the pre-stacked bagged loose material is stacked at the top of the landfill area, and then the bagged loose material at the top of the landfill area is broken, so that the loose material spills into the gaps formed by the stacking.

5. The method for rigid landfilling of hazardous waste according to claim 1, characterized in that, The transfer and conveying unit includes a transfer track and a transfer and conveying platform laid between the fixed lifting device and the receiving point of the landfill operation unit, and the transfer and conveying platform moves on the transfer track; The transfer and conveying platform is equipped with a stationary turning device at its bottom, which is used to switch tracks in different directions, enabling the transfer and conveying platform to turn in place and achieve track switching and turning.

6. The rigid landfill method for hazardous waste according to claim 5, characterized in that, The in-situ turning device includes a lifting device at the bottom of the transfer conveyor platform and a rotating device set on the track wheels at the bottom of the transfer conveyor platform; The lifting device includes a locking part and a lifting part. The lifting part is connected to the bottom of the transfer conveying platform, and the locking part is connected to the lifting part. The lifting part drives the locking part to move towards the track. The locking part is used to lock onto the track to fix the relative position of the transfer conveying platform. The rotating device is used to drive the track wheel to rotate relative to the transfer conveyor platform, so that the transfer conveyor platform can rotate along the track.

7. The rigid landfill method for hazardous waste according to claim 6, characterized in that, The rotating device includes a steering drive structure installed at the bottom of the transfer conveying platform, and a first helical gear is installed at the output end of the steering drive structure; A second helical gear is fitted onto the mounting part of the track wheel. The first helical gear and the second helical gear mesh, and the meshing directions of the first helical gear and the second helical gear are perpendicular to each other. The rotation of the first helical gear and the second helical gear is driven by the steering drive structure to turn the track wheel.

8. The method for rigid landfilling of hazardous waste according to claim 6, characterized in that, The locking part includes a locking claw; The top of the claw is connected to the lifting part, the bottom of the claw is provided with a slot, and the side of the claw is provided with a through slot. The through slot communicates with the slot, and a clamping block is rotatably installed in the through slot. When the track enters the slot, the track is clamped between the inner wall of the slot and the clamping block by the rotation of the clamping block. The bottom of the transfer conveying platform is equipped with a snap-fit ​​drive structure, which includes a first drive structure and a linkage rod structure installed at the drive end of the first drive structure. The first drive structure is connected to the bottom of the transfer conveying platform, and the first drive structure drives the clamping block to rotate through the linkage rod structure via telescopic movement. The linkage structure includes a U-shaped connector, the open end of which is rotatably connected to one end of the rail clamping rod, and the end of the U-shaped connector opposite to its open end is connected to the driving end of the first driving structure; the other end of the rail clamping rod is rotatably connected to the clamping block.

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