Hazardous waste rigid landfill method

Abstract

The invention relates to the technical field of hazardous waste landfill, in particular to a hazardous waste rigid landfill method which comprises the following steps: pre-treating a to-be-landfilled material into a loose material and a compressed material, and packaging to respectively obtain a bagged loose material and a bagged compressed material; the bagged loose materials and the bagged compressed materials are lifted and conveyed to a transfer conveying platform of the transfer conveying unit; the transfer conveying platform is moved to the material receiving position of the landfill operation unit, and the bagged materials are moved to a material storage area from the transfer conveying platform; transporting the bagged materials from the material storage area to a specified drop point of a specified landfill area by utilizing a landfill operation unit; and the steps are repeated, stacking of the bagged compressed materials in the landfill area is completed, gaps formed after stacking are filled with loose materials in the bagged loose materials, the whole landfill area is compacted, and landfill is completed. According to the method, the operation efficiency is improved, and the rigid landfill storage capacity utilization rate is increased while the stacking density is increased.

Description

Technical Field

[0001] The invention relates to the technical field of hazardous waste landfill, and in particular to a hazardous waste rigid landfill method. Background Art

[0002] With the rapid development of the national economy, the types of hazardous wastes generated in the production processes of industrial enterprises are becoming increasingly complex, and the original flexible landfill technology can no longer meet the landfill disposal needs of existing hazardous wastes.

[0003] At present, the landfill disposal of hazardous waste adopts rigid landfill. The main project of rigid landfill is the unit pool of rigid landfill, and the unit pool adopts HDPE membrane for anti-seepage; the later closure adopts prefabricated concrete slabs, and a visual inspection layer is set at the bottom of the unit pool, and a mobile canopy and lifting machinery are set above the unit pool. The landfill materials that meet the entry requirements are transported to the hazardous waste lifting point by transport vehicles, and the landfill materials are lifted by cranes to the unit pool for unloading, and the landfill materials are stacked in layers. Among them, the landfill method of waste is usually: using gantry cranes for lifting and hoisting in the workshop outside the rigid landfill; however, the existing rigid landfill operation needs to rely on mechanical equipment to achieve the transfer and landfill disposal of hazardous waste. The mainstream operation equipment is a single-span or multi-span crane. There are the following problems in actual operation: First, the use of cranes to transfer hazardous waste materials. Since the crane is used during the entire transfer process, in order to ensure that the hazardous waste does not fall, the crane needs to rotate smoothly, thereby slowing down the crane, resulting in low efficiency in the crane's transfer of hazardous waste materials, which cannot meet the operation requirements; second, there are blind spots in the operation and the low landfill stacking density leads to low storage capacity utilization;

[0004] For example, the application number is CN113894134A, and the name is a hazardous waste landfill operation unit and method. The operation system includes: a stamping device for stamping hazardous waste materials into block preforms; a stacking device for stacking the block preforms in the cells of the rigid landfill. The operation system and method can improve the storage capacity utilization rate of the rigid landfill to a certain extent, but the sharp corners of the material after briquetting can easily damage the anti-seepage layer, and the landfill cells are unevenly stressed, which poses a structural safety hazard. Summary of the invention

[0005] In order to solve the problems of the prior art, the present invention provides a method for rigid landfill of hazardous waste, comprising the following steps:

[0006] S1, pre-processing the materials to be landfilled into loose materials and compressed materials, and packing them to obtain bagged loose materials and bagged compressed materials respectively;

[0007] S2, lifting and transporting the bagged loose materials and the bagged compressed materials to the transfer conveying platform of the transfer conveying unit by means of a fixed lifting device;

[0008] S3, moving the transfer conveying platform to the material receiving area of ​​the landfill operation unit, and moving the bagged material from the transfer conveying platform to the material storage area of ​​the landfill operation unit;

[0009] S4, using a landfill operation unit to transport the bagged material from the material storage area to a designated drop point in a designated landfill area;

[0010] S5, repeating steps S2-S4 to complete the stacking of the bagged compressed materials in the landfill area, filling the gaps after stacking with the loose materials in the bagged loose materials, and compacting the entire landfill area with a vibration compaction unit to complete the landfill.

[0011] Furthermore, the division method of the designated landing point is: dividing the landfill area into a number of grid landfill units, each grid landfill unit is used as a landing point to carry out the material landfill operation.

[0012] Furthermore, the stacking rules are layered stacking, staggered stacking or slope control;

[0013] Layered stacking: stack bagged materials in layers;

[0014] Staggered stacking: two adjacent layers of bagged materials are stacked alternately;

[0015] Slope control is to make the slope of the stack body adapt to the slope of the landfill area.

[0016] Furthermore, the gaps after stacking are filled with loose materials in the bagged loose materials. Specifically, whenever the stacking height reaches a preset height, the pre-stacked bagged loose materials are stacked at the top of the landfill area, and then the bagged loose materials at the top of the landfill area are broken, so that the loose materials are scattered into the gaps formed by the stacking.

[0017] Further, the compaction operation is:

[0018] Obtaining stacking gap parameters, the stacking gap parameters including gap width data and depth data formed by stacking, and 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 to obtain compaction parameters;

[0019] Based on the compaction parameters, a vibratory compaction unit is used to control the vibration frequency, amplitude and compaction speed to compact the landfill area.

[0020] Furthermore, the pretreatment includes: firstly, crushing the material to be landfilled into small pieces of 10-15 cm by a crushing device, and then crushing the small pieces of 10-15 cm by a crusher into loose materials of 1-2 mm and outputting them according to the index, bagging and packing the loose materials that meet the index into bagged materials, and sending the loose materials that do not meet the index into a mixing and stirring device, adding the dosing agent and the auxiliary material to the mixing and stirring device through the dosing system and the auxiliary material adding system for mixing and stirring, and after the reaction, the loose materials are briquetted and bagged into bagged compressed materials by a hydraulic compacting device for transfer to the designated landfill area of ​​the landfill for landfilling.

[0021] Further, the transfer conveying unit comprises a transfer track and a transfer conveying platform laid between the fixed lifting device and the material receiving portion of the landfill unit, and the transfer conveying platform moves on the transfer track;

[0022] An on-site steering device is provided at the bottom of the transfer and conveying platform, which is used for switching tracks in different directions, so that the transfer and conveying platform can be turned on-site to achieve track change and steering.

[0023] Further, the in-situ steering device includes a lifting device at the bottom of the transfer and conveying platform and a rotating device arranged on the rail wheel at the bottom of the transfer and conveying platform;

[0024] The lifting device comprises a clamping part and a lifting part, wherein the lifting part is connected to the bottom of the transfer conveying platform, and the clamping part is connected to the lifting part, and the lifting part drives the clamping part to move toward the track; the clamping part is used to clamp with the track to fix the relative position of the transfer conveying platform;

[0025] The rotating device is used to drive the track wheel to rotate relative to the transfer and conveying platform, so that the transfer and conveying platform can move on the track;

[0026] Further, the rotating device comprises a steering drive structure installed at the bottom of the transfer conveying platform, and a first bevel gear is installed at the output end of the steering drive structure;

[0027] A second bevel gear is sleeved and installed on the mounting portion of the track wheel, the first bevel gear and the second bevel gear are meshed, and the meshing mounting directions of the first bevel gear and the second bevel gear are perpendicular to each other, and the track wheel is turned by driving the first bevel gear and the second bevel gear to rotate through the steering drive structure.

[0028] Further, the clamping portion includes a clamping claw;

[0029] The top of the clamping claw is connected to the lifting part, the bottom of the clamping claw is provided with a clamping slot, the side of the clamping claw is provided with a through slot, the through slot is communicated with the clamping slot, a clamping block is rotatably installed in the through slot, when the track enters the clamping slot, the track is clamped between the inner wall of the clamping slot and the clamping block through the rotation of the clamping block;

[0030] A clamping drive structure is installed at the bottom of the transfer conveying platform, and the clamping drive structure includes a first drive structure and a linkage rod structure installed at the driving 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 through telescopic movement;

[0031] The linkage rod structure includes a U-shaped connecting piece, the open end of the U-shaped connecting piece is rotatably connected to one end of the track clamping rod, and the end of the U-shaped connecting piece opposite to its open end is connected to the driving end of the first driving structure; the other end of the track clamping rod is rotatably connected to the clamping block.

[0032] Beneficial effects of the present invention:

[0033] The present invention solves the problems of high risk of manual operation, low stacking density and high operating cost by arranging a pretreatment unit, a fixed lifting device, a transfer conveying unit, a landfill operation unit and a vibration compaction unit, improves the operation efficiency, reduces the landfill operation cost by 50%, increases the stacking density by 10%, and improves the utilization rate of the rigid landfill storage capacity, which has important practical significance for the safe and efficient disposal of rigid landfill materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A flow chart of a method for rigid landfilling of hazardous waste provided by an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the structure of a fixed lifting device provided in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of the structure of a transfer and transport unit provided in an embodiment of the present invention;

[0037] Figure 4 A schematic diagram of the structure of an on-site steering device provided by an embodiment of the present invention;

[0038] Figure 5 It is a schematic diagram of the installation of a landfill operation unit and a vibration compaction unit according to an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of the structure of a rotating assembly provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] See also Figure 1-6 , the present invention provides a method for rigid landfill of hazardous waste, comprising the following steps: S1, pre-treating the materials to be landfilled into loose materials and compressed materials, and packing them to obtain bagged loose materials and bagged compressed materials respectively;

[0042] S2, lifting and transporting the bagged loose materials and the bagged compressed materials to the transfer conveying platform of the transfer conveying unit by means of a fixed lifting device;

[0043] S3, moving the transfer conveying platform to the material receiving area of ​​the landfill operation unit, and moving the bagged material from the transfer conveying platform to the material storage area of ​​the landfill operation unit;

[0044] S4, using a landfill operation unit to transport the bagged material from the material storage area to a designated drop point in a designated landfill area;

[0045] S5, repeating steps S2-S4 to complete stacking of the bagged compressed materials in the landfill area, filling the gaps after stacking with loose materials in the bagged loose materials, and compacting the entire landfill area with a vibrating compaction unit to complete the landfill;

[0046] The method for dividing the designated landing points is as follows: the landfill area is divided into a number of grid landfill units, each grid landfill unit is used as a landing point for material landfill operations.

[0047] Among them, the stacking rules are layered stacking, staggered stacking and slope control;

[0048] Layered stacking: stack bagged materials in layers to reduce the gaps between materials and reduce the generation of leachate;

[0049] Staggered stacking: Two adjacent layers of bagged materials are stacked in an alternating manner. Staggered stacking is used to enhance the overall stability of the stack and prevent the materials from sliding or collapsing during the landfill process.

[0050] Slope control is to adjust the slope of the stack to the slope of the landfill area to prevent materials from sliding under the action of gravity.

[0051] The gaps after stacking are filled with loose materials in the bagged loose materials, specifically:

[0052] Whenever the stacking height reaches a preset height, the pre-stacked bagged loose materials are stacked at the top of the landfill area, and then the bagged loose materials at the top of the landfill area are broken so that the loose materials fall into the gaps formed by the stacking.

[0053] The compaction operation is as follows: obtaining 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 materials with the filling compaction density based on the filling compaction density requirements to obtain compaction parameters; and compacting the landfill area using a vibration compaction unit based on the compaction parameters;

[0054] 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. In order to obtain accurate gap width data, actual measurements can be made 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 stacking layer. The gap depth data is determined by on-site measurement. The size of loose materials is 1-2mm. The landfill area is compacted by controlling the vibration frequency, amplitude and compaction speed through the vibration compaction unit, thereby controlling the compaction density.

[0055] The pretreatment includes: firstly, crushing the materials to be landfilled into small pieces of 10-15 cm by a crushing device, and then crushing the small pieces of 10-15 cm by a crusher into loose materials of 1-2 mm and outputting them according to the index; the loose materials meeting the index are bagged and packed into bagged loose materials; the loose materials not meeting the index are sent to a mixing and stirring device, and the dosing agent and auxiliary materials are added to the mixing and stirring device through a dosing system and an auxiliary material adding system for mixing and stirring; after the reaction, the loose materials are compressed into bags by a hydraulic compacting device for transfer to the designated landfill area of ​​the landfill for landfilling.

[0056] Wherein, the transfer conveying unit comprises a transfer track and a transfer conveying platform laid between the fixed lifting device and the material receiving position of the landfill unit, and the transfer conveying platform can move on the transfer track;

[0057] The bottom of the transfer and conveying platform is provided with an on-site turning device, which is used for switching tracks in different directions, so that the transfer and conveying platform can be turned on-site without rotating, thereby realizing track change and turning;

[0058] It should be noted that the rigid landfill method for hazardous waste is to pre-process large bags of materials to be crushed to obtain loose materials, and the loose materials that meet the indicators are bagged and packed into bagged materials, or compressed into bags and compressed materials for transfer to the designated landfill area of ​​the landfill for landfill;

[0059] First, the large bags of materials that need to be crushed are lifted by an electric hoist into the bag breaking and crushing device, and then the entrance of the bag breaking and crushing device is closed. The bags are broken by the electric bag breaking device, and the materials enter the receiving port of the crushing device through the conical discharge port at the bottom. The materials are crushed into small pieces of 10-15 cm through mechanical crushing. Since a large amount of dust will be generated during the bag breaking and crushing process, the bag breaking and crushing device is equipped with a dust collector to collect and treat the dust to ensure that the exhaust gas meets the emission standards; second, the discharge port of the crushing device is connected to the receiving port of the crusher to further crush the 10-15 cm small pieces into 1-2 mm loose materials. A bypass is set at the discharge port of the crusher. If there is no abnormality in the material detection and analysis indicators, it can be directly re-bagged through the bypass and used as a bottom pad or filling material later. It can also be directly sent to the hydraulic compaction device through the bypass to press the blocks into bags and then transferred to landfill for disposal. This setting plays an important practical role in coping with material complexity and improving production flexibility;

[0060] The loose materials that do not meet the indicators are sent to the mixing and stirring device, and the dosing agent and auxiliary materials are added through the dosing system and the auxiliary material adding system for mixing and stirring. After the reaction, the loose materials are briquetted into bagged compressed materials through the hydraulic compacting device, and the bagged compressed materials are transferred to the loading area of ​​the landfill for landfilling;

[0061] When there are abnormalities in the material detection and analysis indicators, the 1-2mm loose materials are lifted by the elevator to the receiving port of the mixing and stirring device. Through the configured dosing system and auxiliary material adding system, after adding the agents and auxiliary materials, a mixing and stirring reaction is carried out. The reaction time is controlled at 20-40 minutes. The mixing process is prone to dust. The mixing device is equipped with a dust collector to capture the dust in the exhaust gas and then discharge it in compliance with the standards; the discharge port of the mixing and stirring device is directly connected to the square receiving device (stainless steel material) of the hydraulic compacting device. After the material is full, start the hydraulic compacting device to compact the loose materials in the square receiving device. After reaching the compaction limit, the hydraulic compacting device automatically recycles. Generally, the material stacking density can reach 1200kg / m after compaction. 3 After the first compaction, the unloading gate valve of the mixing and stirring device needs to be opened again electrically to replenish the square receiving device with materials; the materials compacted by the hydraulic compaction device are packed in bags, and then transferred to the loading area of ​​the landfill by forklifts and dump trucks. In order to ensure that the loading area is not polluted and leaked, anti-seepage materials are laid in the landfill operation area as an isolation layer between the materials and the ground.

[0062] During the landfill operation, firstly, the belt conveyor mechanism 1 in the fixed lifting device is controlled to convey 10-12 bags of bagged materials to the working plane of the transfer conveying unit at a time along the vertical track; then, the transfer conveying platform of the transfer conveying unit is controlled to drive the belt horizontal conveying mechanism 2 to travel along the working track to the material receiving position of the transfer conveying unit, so that the belt horizontal conveying mechanism 2 is docked with the belt horizontal conveying platform 1 of the fixed lifting device; then, the belt horizontal conveying platform 1 of the fixed lifting device is controlled to convey the bagged materials it carries to the belt horizontal conveying mechanism 2 of the transfer conveying unit;

[0063] It should be noted that the fixed lifting device can transport 10-12 bags of materials at a time, which greatly improves the material transportation efficiency compared to the traditional crane that can lift up to 2 bags of materials at a time. Compared with the traditional crane, it saves the time of the operating platform to dump materials back and forth, which greatly shortens the operation time. In addition, the traditional crane can only carry 4 bags of materials at a time, while the transfer conveying platform can carry 10-12 bags of materials at a time and can automatically connect with the landfill operation platform, which greatly improves the operation efficiency. Based on the disposal of 40,000 tons of hazardous waste, the disposal cost of the new rigid landfill operation technology is about 7.3 yuan / ton (including labor, electricity, equipment depreciation and all civil engineering costs), and the disposal cost of the traditional crane operation is about 15.7 yuan / ton (including labor, electricity, equipment depreciation and all civil engineering costs). The new rigid landfill operation technology reduces the operating cost by 50% compared with the traditional crane landfill technology. The unit time efficiency of the new landfill operation technology is twice that of the traditional crane, and it takes an average of 4 minutes to complete the landfill of a bag of materials.

[0064] The fixed lifting device comprises a steel structure outer frame, a hoisting hoist, a vertical track and a belt conveyor mechanism; the hoisting hoist is installed on the top of the steel structure outer frame, and the vertical track and the belt conveyor mechanism are arranged inside the steel structure outer frame, and the belt conveyor mechanism is installed at the bottom of the vertical track;

[0065] The hoist can lift 10-12 bags of bagged loose materials or bagged compressed materials at a time; the belt conveyor mechanism is a belt conveyor mechanism, which is moved along the vertical track by the hoist to convey the bagged loose materials or bagged compressed materials on the ground to the working plane of the transfer conveying unit; due to the fixed lifting and loading, the working safety is greatly improved;

[0066] The transfer conveying unit includes an operating track and a transfer conveying platform. A second belt-type horizontal conveying mechanism is arranged on the transfer conveying platform, and four in-situ steering devices are installed at the bottom of the transfer conveying platform, which are used to control the in-situ steering device to change direction by clamping the track and lifting the transfer conveying platform with longitudinal support, so as to realize flexible track change of the transfer conveying unit and the landfill operation unit; the transfer conveying platform is arranged on the operating track, and is used to drive the second belt-type horizontal conveying mechanism to perform linear reciprocating motion along the operating track, so that the second belt-type horizontal conveying mechanism can be moved to the material receiving place of the transfer conveying unit and docked with the first belt-type horizontal conveying mechanism, receiving the bagged loose materials or bagged compressed materials conveyed by the first belt-type horizontal conveying mechanism, and conveying the bagged loose materials or bagged compressed materials to the landfill operation unit through the conveyance of the second belt-type horizontal conveying mechanism;

[0067] The in-situ steering device includes a lifting device at the bottom of the transfer and conveying platform and a rotating device arranged on the rail wheel at the bottom of the transfer and conveying platform;

[0068] The lifting device comprises a clamping part and a lifting part, wherein the lifting part is connected to the bottom of the transfer conveying platform, and the clamping part is connected to the lifting part, and the lifting part drives the clamping part to move toward the track; the clamping part is used to clamp with the track to fix the relative position of the transfer conveying platform;

[0069] The rotating device is used to drive the track wheel to rotate relative to the transfer and conveying platform, so that the transfer and conveying platform can move on the track;

[0070] Further, the rotating device comprises a steering drive structure installed at the bottom of the transfer conveying platform, and a first bevel gear is installed at the output end of the steering drive structure;

[0071] A second bevel gear is sleeved and installed on the mounting portion of the track wheel, the first bevel gear and the second bevel gear are meshed, and the meshing mounting directions of the first bevel gear and the second bevel gear are perpendicular to each other, and the track wheel is turned by driving the first bevel gear and the second bevel gear to rotate through the steering drive structure.

[0072] Further, the clamping portion includes a clamping claw;

[0073] The top of the clamping claw is connected to the lifting part, the bottom of the clamping claw is provided with a clamping slot, the side of the clamping claw is provided with a through slot, the through slot is communicated with the clamping slot, a clamping block is rotatably installed in the through slot, when the track enters the clamping slot, the track is clamped between the inner wall of the clamping slot and the clamping block through the rotation of the clamping block;

[0074] A clamping drive structure is installed at the bottom of the transfer conveying platform, and the clamping drive structure includes a first drive structure and a linkage rod structure installed at the driving 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 through telescopic movement;

[0075] The linkage rod structure includes a U-shaped connecting piece, the open end of the U-shaped connecting piece is rotatably connected to one end of the track clamping rod, and the end of the U-shaped connecting piece opposite to its open end is connected to the driving end of the first driving structure; the other end of the track clamping rod is rotatably connected to the clamping block.

[0076] Wherein, the first driving structure is an electric cylinder or an electric telescopic rod, and the clamping block is provided with an arc surface that matches the shape of the outer side of the track on the side facing the slot; the steering driving structure is a motor; and the lifting part is an electric cylinder or an electric telescopic rod;

[0077] Among them, first, after the materials are transferred to the loading area of ​​the fixed lifting device, the forklift will transfer the materials 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 fixed lifting loading of the winch hoist, the safety of the operation is greatly improved;

[0078] The fixed lifting device and transfer conveying unit can carry and transport 10-12 bags of materials at a time. On average, it takes 20 minutes to transport 10 bags of ground materials to the transfer conveying platform in the transfer conveying unit. Cross-guide rails are set at the first row of horizontal tracks and all vertical tracks. Through reasonable laying and modification of tracks and setting in-situ steering devices in the transfer conveying unit and landfill operation unit, the transfer conveying unit and landfill operation unit can be flexibly moved, realizing the flexible movement of the transfer conveying unit and landfill operation unit in the landfill site, saving equipment transfer costs.

[0079] Among them, the transfer conveying unit carries the materials to the landfill operation unit for docking. When the transfer conveying platform needs to change tracks and move to the landfill operation unit, the transfer conveying unit moves to the landfill unit cell equipped with a cross track to accurately cover the landfill unit cell. Then, through the control system, the four in-situ steering devices installed at the bottom of the transfer conveying platform successively execute the three commands of clamping the track, lifting the transfer conveying platform with longitudinal support, and reversing the direction of the transfer conveying platform's wheels. After the track change is completed, it docks with the landfill operation unit along the track. The transfer conveying platform with the added in-situ steering device can shuttle between landfills more flexibly and dock with the landfill operation unit in a timely manner, eliminating the time for the transfer conveying platform to repeatedly travel back and forth to the landfill loading area to pick up materials, thereby improving operating efficiency;

[0080] Controlling the transfer conveying platform to drive the belt-type horizontal conveying mechanism 2 carrying bagged loose materials and bagged compressed materials to transfer to the material receiving position of the landfill operation unit through the in-situ steering device;

[0081] The single-arm operating mechanism of the landfill operation unit is controlled to place the bagged loose materials and bagged compressed materials delivered by the transfer and conveying unit into the material storage area, and then the mobile operating platform of the landfill operation unit is controlled to run to the designated landfill area, and then the bags are hung manually. The operator in the independent operation room controls the single-arm operating mechanism to first complete the lifting of the loose materials at the bottom of the pile, hoisting to the designated landfill point, dropping, adjustment, and remote unhooking processes, and then the transfer and conveying unit and the landfill operation unit stack and landfill the bagged compressed materials through the above-mentioned fixed lifting device, and the bagged loose materials are broken to fill the gaps after landfilling. After the filling is completed, the vibration compaction unit is finally used to perform vibration compaction to realize the landfill operation;

[0082] To ensure the safety of the operation, the bag unhooking is designed as an automatic unhooking mode. To increase the convenience of operation, it can also be unhooked by remote control.

[0083] The landfill operation unit comprises a landfill operation platform, a single-arm operation mechanism, an independent operation room and the in-situ steering device installed at the bottom of the mobile operation platform;

[0084] The single-arm operating mechanism and the independent operating room are arranged on the landfill operating platform, and the landfill operating platform is used to drive the single-arm operating mechanism and the independent operating room to move, and is used as a material storage area to place bagged loose materials or bagged compressed materials delivered by the transfer conveying unit; the independent operating room is used to control the action of the single-arm operating mechanism, and the single-arm operating mechanism is used to place the bagged loose materials or bagged compressed materials delivered by the transfer conveying unit into the material storage area and to hoist the bagged loose materials or bagged compressed materials to the designated landfill point for landfill operation;

[0085] The landfill operation unit also includes a control system and a positioning system and a video monitoring system installed on the single-arm operation mechanism, which are used to realize remote control operation and realize accurate placement of bagged loose materials or bagged compressed materials, so that the operator in the independent operation room can control the single-arm operation mechanism to perform corresponding actions through the video monitoring and control system; the control system has automatic, manual and remote control modes, and the corresponding mode is selected for control adjustment according to the actual situation on site;

[0086] It should be noted that, considering the need for nighttime emergency operations, the landfill operation platform is equipped with platform lighting and auxiliary video surveillance. In addition, the hazardous waste entering the rigid landfill is toxic and volatile, which will endanger the occupational health of workers during landfill operations. Short-term contact will cause dizziness and nausea, and high temperature weather is prone to safety accidents such as fainting and falling. Therefore, the landfill operation platform is equipped with an independent operation room and air conditioning to avoid direct contact with hazardous waste and achieve safe landfill operations;

[0087] The gaps after landfill are filled by breaking the bagged loose materials, which specifically includes: lifting the bagged loose materials to the designated landfill area, breaking the bagged loose materials by electric bag breaking equipment, pouring the broken loose materials into the stacked layer of bagged compressed materials for filling, and controlling the vibration compaction unit to perform vibration compaction, so that the landfill gaps are evenly filled to maximize the storage capacity utilization;

[0088] 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, transmits the information remotely into the storage capacity management software, and counts the material type and weight of each unit, providing data support for the subsequent maintenance of the rigid landfill and long-term resource utilization.

[0089] The vibrating compaction unit comprises a sling and a vibrating base plate; the landfill operation platform is connected to the vibrating base plate via the sling, a vibrating motor is installed on the vibrating base plate, and an electric control system is connected to the vibrating motor to control the vibrating motor to vibrate and compact the loose materials and bagged compressed materials, uniformly fill the landfill gaps, maximize the storage capacity utilization, and improve the landfill stacking density and storage capacity utilization rate;

[0090] Among them, the new combined rigid landfill operation technology can increase the bulk density of landfill waste salt to 1400kg / m 3 The stacking density of the waste salt is increased by about 10% compared with the traditional landfill operation after the waste salt is pressed into cakes.

[0091] It is worth mentioning that, firstly, by setting up an independent operation room, a positioning system, a video monitoring system and a control system, remote control operations can be realized and precise placement of bagged loose materials and bagged compressed materials can be achieved, so that the operators in the independent operation room can control the single-arm operating mechanism to perform corresponding actions through the video monitoring and control system; reducing the chances of operators coming into contact with hazardous wastes, reducing the risks of manual operations, and realizing unmanned landfill operations in the landfill pool, which greatly reduces the occupational health risks of operators and is of great significance for improving the occupational health of operators; secondly, by setting up a fixed lifting device, the construction investment of the rigid landfill loading port can be saved, reducing the landfill operation cost; thirdly, the fixed lifting device and the transfer conveying unit can carry and transport 10-12 bags of materials at a time, and it takes an average of 20 minutes to complete the transfer of 10 bags of ground materials to the operating platform. Compared with the traditional crane that can lift a maximum of 2 bags of materials at a time, the material transportation efficiency is greatly improved; at the same time, due to the fixed lifting and loading adopted by the fixed lifting device, the operation safety is greatly improved. Fourthly, an in-situ steering device is installed at the bottom of the transfer conveying platform, which is used to control the in-situ steering device to execute the clamping rail and the longitudinal support to lift the transfer conveying platform to change direction, thereby realizing flexible track change of the transfer conveying unit and the landfill operation unit, saving equipment transfer costs and increasing operation time; finally, by adding video monitoring and control systems to the landfill operation unit, it is convenient to realize the precise stacking of materials, reduce landfill dead corners, increase stacking density, and improve storage capacity utilization.

[0092] Therefore, the present invention solves the problems of high risk of manual operation, low stacking density and high operating cost by setting a pre-treatment unit, a fixed lifting device, a transfer conveying unit and a landfill operation unit, improves the operation efficiency, reduces the landfill operation cost, and improves the rigid landfill storage capacity utilization rate and operation safety; it has important practical significance for the safe and efficient disposal of rigid landfill materials;

[0093] It is worth noting that the combined hazardous waste rigid landfill system used in the present 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 the traditional landfill operation technology, the combined rigid landfill system is equipped with an in-situ steering device to improve the mobility and flexibility of the transfer and conveying system; the multi-unit combined operation can achieve an increase in operating efficiency by more than two times, reduce the landfill operation cost by 50%, increase the stacking density by 10%, and have better operating safety, truly achieving the goal of safe, efficient and low-cost landfill operations.

[0094] 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 in the protection scope of the present invention.

Claims

1. A method for rigid landfill of hazardous waste, characterized in that: The following steps are involved: S1, pre-processing the materials to be landfilled into loose materials and compressed materials, and packing them to obtain bagged loose materials and bagged compressed materials respectively; S2, lifting and transporting the bagged loose materials and the bagged compressed materials to the transfer conveying platform of the transfer conveying unit by means of a fixed lifting device; S3, moving the transfer conveying platform to the material receiving area of ​​the landfill operation unit, and moving the bagged material from the transfer conveying platform to the material storage area of ​​the landfill operation unit; S4, using a landfill operation unit to transport the bagged material from the material storage area to a designated drop point in a designated landfill area; S5, repeating steps S2-S4 to complete the stacking of the bagged compressed materials in the landfill area, filling the gaps after stacking with the loose materials in the bagged loose materials, and compacting the entire landfill area with a vibration compaction unit to complete the landfill.

2. The method for rigid landfill of hazardous waste according to claim 1, characterized in that: The method for dividing the designated landing points is: dividing the landfill area into a number of grid landfill units, each grid landfill unit is used as a landing point for material landfill operations.

3. The method for rigid landfill of hazardous waste according to claim 1, characterized in that: The stacking rules are layered stacking, staggered stacking or slope control; Layered stacking: stack bagged materials in layers; Staggered stacking: two adjacent layers of bagged materials are stacked alternately; Slope control is to make the slope of the stack body adapt to the slope of the landfill area.

4. The method for rigid landfill of hazardous waste according to claim 1, characterized in that: Use the loose materials in the bagged loose materials to fill the gaps after stacking, specifically: Whenever the stacking height reaches a preset height, the pre-stacked bagged loose materials are stacked at the top of the landfill area, and then the bagged loose materials at the top of the landfill area are broken so that the loose materials fall into the gaps formed by the stacking.

5. The method for rigid landfill of hazardous waste according to claim 1, characterized in that: The compaction operation is: Obtaining stacking gap parameters, the stacking gap parameters including gap width data and depth data formed by stacking, and 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 to obtain compaction parameters; Based on the compaction parameters, a vibratory compaction unit is used to control the vibration frequency, amplitude and compaction speed to compact the landfill area.

6. The method for rigid landfill of hazardous waste according to claim 1, characterized in that: The pretreatment comprises: firstly crushing the materials to be landfilled into small pieces of 10-15 cm by a crushing device, and then crushing the small pieces of 10-15 cm by a crusher into loose materials of 1-2 mm and outputting them according to the index, and packing the loose materials that meet the index into bags and packing them into bagged loose materials; the loose materials that do not meet the index are sent to a mixing and stirring device, and the dosing agent and auxiliary materials are added to the mixing and stirring device through a dosing system and an auxiliary material adding system for mixing and stirring, and after the reaction, the loose materials are briquetted and bagged into bagged compressed materials by a hydraulic compacting device for transfer to a designated landfill area of ​​a landfill for landfilling.

7. The method for rigid landfill of hazardous waste according to claim 1, characterized in that: The transfer conveying unit comprises a transfer track and a transfer conveying platform laid between the fixed lifting device and the material receiving portion of the landfill unit, and the transfer conveying platform moves on the transfer track; An on-site steering device is provided at the bottom of the transfer and conveying platform, which is used for switching tracks in different directions, so that the transfer and conveying platform can be turned on-site to achieve track change and steering.

8. The method for rigid landfill of hazardous waste according to claim 7, characterized in that: The in-situ steering device includes a lifting device at the bottom of the transfer and conveying platform and a rotating device arranged on the rail wheel at the bottom of the transfer and conveying platform; The lifting device comprises a clamping part and a lifting part, wherein the lifting part is connected to the bottom of the transfer conveying platform, and the clamping part is connected to the lifting part, and the lifting part drives the clamping part to move toward the track; the clamping part is used to clamp with 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 and conveying platform, so that the transfer and conveying platform can move on the track.

9. The method for rigid landfill of hazardous waste according to claim 8, characterized in that: The rotating device comprises a steering drive structure installed at the bottom of the transfer conveying platform, and a first bevel gear is installed at the output end of the steering drive structure; A second bevel gear is sleeved and installed on the mounting portion of the track wheel, the first bevel gear and the second bevel gear are meshed, and the meshing mounting directions of the first bevel gear and the second bevel gear are perpendicular to each other, and the track wheel is turned by driving the first bevel gear and the second bevel gear to rotate through the steering drive structure.

10. The method for rigid landfill of hazardous waste according to claim 8, characterized in that: The clamping portion includes a clamping claw; The top of the clamping claw is connected to the lifting part, the bottom of the clamping claw is provided with a clamping slot, the side of the clamping claw is provided with a through slot, the through slot is communicated with the clamping slot, a clamping block is rotatably installed in the through slot, when the track enters the clamping slot, the track is clamped between the inner wall of the clamping slot and the clamping block through the rotation of the clamping block; A clamping drive structure is installed at the bottom of the transfer conveying platform, and the clamping drive structure includes a first drive structure and a linkage rod structure installed at the driving 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 through telescopic movement; The linkage rod structure includes a U-shaped connecting piece, the open end of the U-shaped connecting piece is rotatably connected to one end of the track clamping rod, and the end of the U-shaped connecting piece opposite to its open end is connected to the driving end of the first driving structure; the other end of the track clamping rod is rotatably connected to the clamping block.

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