Solid waste leaching toxicity leachate preparation system

Abstract

This invention provides a system for preparing toxic leachate from solid waste. The device comprises a sample stage, a crushing module, a mixing module, a robotic arm for gripping the equipment, a weighing module for weighing the samples processed by the crushing and mixing modules, a tilting mixing module for conducting leaching experiments on the accurately weighed samples, and a pressure filter module for filtering the leachate processed by the tilting mixing module. This system not only avoids the risk of sample contamination from manual operation but also significantly improves accuracy and efficiency through automation, greatly reducing the physical exertion required for manual work. Furthermore, by designing a double-layer pressure filter, large particles of solid waste are first filtered out, followed by sedimentation of some fine powdery solid waste. This prevents a large amount of solid from adhering to the filter membrane and tearing the filter paper, thus affecting the pressure filter efficiency. This makes the entire pressure filter process faster and achieves excellent solid-liquid separation.

Description

Technical Field

[0001] This invention relates to the field of environmental protection equipment technology for the resource utilization of hazardous waste, and in particular to a system for preparing toxic leachate from solid waste. Background Technology

[0002] Solid waste refers to solid, semi-solid, and gaseous items and substances placed in containers that are generated during production, daily life, and other activities and have lost their original utilization value, or have not lost their utilization value but have been discarded or abandoned, as well as items and substances that are included in the management of solid waste according to laws and administrative regulations. Solid waste leaching toxicity identification refers to the process of leaching solid waste with water and determining whether the leached hazardous substances exceed the corresponding emission limits, thereby determining the nature of the solid waste. Samples for solid waste leaching toxicity identification are mainly solid and semi-solid substances. There are two pretreatment methods for solid waste leaching toxicity: the sulfuric acid-nitric acid method (HJ / T299-2007) and the horizontal oscillation method (HJ557-2010). When identifying the leaching toxicity of solid waste, a two-step leaching test should be performed sequentially. First, a leaching test using the sulfuric acid-nitric acid method (HJ / T299-2007) should be conducted on the sample to determine the relevant test items in the leachate and classify the sample as hazardous waste. If it is determined not to be hazardous waste, a leaching test using the horizontal oscillation method (HJ557-2010) should be performed to determine whether the solid waste is classified as Class I or Class II solid waste. Specifically, the sulfuric acid-nitric acid method (HJ / T299-2007) requires the sample to have a particle size of less than 9.5 mm, while the horizontal oscillation method (HJ557-2010) requires the sample to have a particle size of less than 3 mm. Most solid waste identification samples originate from mine tailings, heap leaching residues, etc. These samples often accumulate over long periods, forming large, hard lumps. The particle size requirements vary depending on the specific identification process, posing significant challenges to sample preparation. Furthermore, the inconsistent particle size results in poor precision of the measurement results, introducing difficulties and risks into solid waste identification. Currently, there is no dedicated equipment for preparing samples for solid waste leaching toxicity testing; most methods rely on manual sample preparation. Manual sample preparation is not only inefficient but also prone to contamination. Therefore, sample preparation remains a critical challenge for solid waste leaching toxicity testing.

[0003] In view of this, it is necessary to design a solid waste leaching toxicity leachate preparation system to solve the above problems. Summary of the Invention

[0004] To address the shortcomings of the existing technology, the present invention aims to provide a solid waste leaching toxicity leachate preparation system that can prepare samples of different particle sizes to meet different leaching test requirements, and to automate the solid waste leaching toxicity pretreatment process from sample preparation to pressure filtration.

[0005] To achieve the above objectives, the present invention provides a solid waste leaching toxicity leachate preparation system, comprising: a sample stage, a crushing module and a mixing module, a robotic arm for delivering the sample on the sample stage to the crushing module and the mixing module for processing, a weighing module for weighing the sample processed by the crushing module and the mixing module, a flipping mixing module for conducting leaching experiments on the accurately weighed sample, and a pressure filter module for filtering the leachate processed by the flipping mixing module.

[0006] Furthermore, the crushing module and the mixing module include a screening mechanism, a crushing device for crushing samples whose particle size does not meet the target requirements, and a mixing device disposed on one side of the crushing device.

[0007] Furthermore, the flipping mixing module includes a flipping chamber, a protective door for closing the flipping chamber, and a poison immersion operation device placed inside the flipping chamber; the flipping chamber includes a liquid filling platform and a poison immersion platform located below the liquid filling platform; the poison immersion operation device includes an automatic liquid dispenser installed on the liquid filling platform, an oscillation system installed on the poison immersion platform, and a temperature control device installed on the oscillation system.

[0008] Further, the filter press module includes a multi-layer filter press, a nitrogen generator connected to the multi-layer filter press via an air inlet pipe, and a filtrate receiver for collecting the filtrate filtered by the multi-layer filter press. The multi-layer filter press includes an outer filter chamber, an inner filter chamber suspended within the outer filter chamber by a support rod, and an inner cover placed on top of the inner filter chamber. The inner diameter of the outer filter chamber is larger than the outer diameter of the inner filter chamber. The inner filter chamber is positioned above the outer filter chamber, and a plurality of small holes are provided in the middle of the sidewall of the inner filter chamber. The highest hole in the inner filter chamber is flush with the top of the outer filter chamber. An outlet is provided at the bottom of the outer filter chamber, and a filter membrane is placed at the bottom of the outer filter chamber. The filter membrane includes either a glass fiber filter membrane or a microporous filter membrane.

[0009] Furthermore, the screening mechanism includes a feed inlet, a screen disposed at the bottom end of the feed inlet, and a sliding device connected to the outer wall of the feed inlet;

[0010] The crushing device includes a crusher inlet located below the feed inlet, a crusher connected to the bottom end of the crusher inlet, and a crusher outlet connected to the output end of the crusher.

[0011] The mixing device includes a mixing inlet located on one side of the crusher inlet and below the feed inlet, a mixing machine connected to the bottom end of the mixing inlet, and a mixing outlet connected to the output end of the mixing machine.

[0012] Furthermore, the sliding device includes a support frame for supporting the feed inlet and connected to the outer wall of the feed inlet, and a slide rail for driving the support frame to slide left and right.

[0013] Furthermore, the automatic liquid dispenser includes a solution storage tank disposed on the liquid dispensing platform, a peristaltic pump connected to the solution storage tank via a conduit, and a plurality of liquid dispensing ports connected to the peristaltic pump via conduits; the liquid dispensing ports are disposed through the liquid dispensing platform, and the liquid dispensing ports include acid liquid dispensing ports and water liquid dispensing ports.

[0014] Furthermore, the oscillation system includes several oscillator fixing plates disposed on the oscillator fixing plate, oscillator bottles placed on the oscillator fixing plate, an automatic capping device disposed above the oscillator bottles, a oscillator bottle cap rotation and pressing mechanism for tightening the caps of the oscillator bottles on the automatic capping device, and an oscillator shaft connected to the oscillator fixing plate.

[0015] Furthermore, the protective door is equipped with a protective door lifting mechanism.

[0016] Furthermore, a sample box for loading samples is placed on the sample stage.

[0017] The beneficial effects of this invention are:

[0018] 1. The solid waste leaching toxicity leachate preparation system provided by the present invention, by setting up a sample stage, a crushing module and a mixing module, a robotic arm for sending the sample on the sample stage to the crushing module and the mixing module for processing, a weighing module for weighing the sample processed by the crushing module and the mixing module, a flipping mixing module for conducting leaching experiments on the accurately weighed sample, and a pressure filter module for filtering the leachate processed by the flipping mixing module, not only can it avoid the risk of sample contamination by manual operation, but also the automated operation greatly improves the accuracy and efficiency of the work and significantly reduces the intensity of manual labor.

[0019] 2. The solid waste leaching toxicity leachate preparation system provided by the present invention designs a double-layer pressure filter device. First, large particles of solid waste are filtered out, and then some fine powdery solid waste is settled. This avoids a large amount of solid adhering to the filter membrane and breaking the filter paper, thus affecting the pressure filtration efficiency. This makes the entire pressure filtration process faster and can achieve solid-liquid separation very well. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a solid waste leaching toxicity leachate preparation system provided by the present invention.

[0021] Figure 2 This is a schematic diagram of the crushing module and the mixing module in a solid waste leaching toxicity leachate preparation system provided by the present invention.

[0022] Figure 3 This is a schematic diagram of the structure of the inverted mixing module in a solid waste leaching toxicity leachate preparation system provided by the present invention.

[0023] Figure 4 This is a partially enlarged structural diagram of the flip-over hybrid module.

[0024] Figure 5 This is a schematic diagram of the structure of a multilayer filter press in a solid waste leaching toxicity leachate preparation system provided by the present invention.

[0025] Figure Labels

[0026] 1-Sample stage; 11-Sample box; 211-Feed inlet; 2121-Support frame; 2122-Slide rail; 221-Crusher inlet; 222-Crusher; 223-Crusher outlet; 231-Mixer inlet; 232-Mixer; 233-Mixer outlet; 3-Robotic arm; 4-Weighing module; 51-Tilting chamber; 511-Liquid addition platform; 512-Poison immersion platform; 52-Protective door; 521-Protective door lifting mechanism; 531-Automatic liquid dispenser; 5311-Peristaltic pump; 5312-Solution storage tank; 5313-Liquid filling port; 5321-Shaker fixing plate; 5322-Poison immersion bottle; 5323-Automatic capping device; 5324-Poison immersion bottle cap rotation and clamping mechanism; 5325-Shaker shaft; 61-Multi-layer filter press; 611-Outer layer filter chamber; 6111-Liquid outlet; 612-Inner layer filter chamber; 613-Inner chamber cover; 62-Air inlet pipe; 63-Nitrogen generator; 64-Filtrate receiver. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0029] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] like Figures 1-4 As shown, a solid waste leaching toxicity leachate preparation system includes: a sample stage 1, a crushing module and a mixing module, a robotic arm 3 for feeding the sample on the sample stage 1 to the crushing module and the mixing module for processing, a weighing module 4 for weighing the sample processed by the crushing module and the mixing module, a flipping mixing module for conducting leaching experiments on the accurately weighed sample, and a pressure filter module for filtering the leachate processed by the flipping mixing module; a sample box 11 for loading the sample is placed on the sample stage 1.

[0031] The crushing module and mixing module include a screening mechanism, a crushing device for crushing samples whose particle size does not meet the target requirements, and a mixing device disposed on one side of the crushing device.

[0032] The screening mechanism includes a feed inlet 211, a Teflon screen disposed at the bottom end of the feed inlet 211, and a sliding device connected to the outer wall of the feed inlet 211; the sliding device includes a support frame 2121 for supporting the feed inlet 211 and connected to the outer wall of the feed inlet 211, and a slide rail 2122 for driving the support frame 2121 to slide left and right.

[0033] The crushing device includes a crusher inlet 221 located below the feed inlet 211, a crusher 222 connected to the bottom end of the crusher inlet 221, and a crusher outlet 223 connected to the output end of the crusher 222.

[0034] The mixing device includes a mixer inlet 231 located on one side of the crusher inlet 221 and below the feed inlet 211, a mixer 232 connected to the bottom end of the mixer inlet 231, and a mixer outlet 233 connected to the output end of the mixer 232; the mixer 232 includes a mixing hopper connected to the mixer inlet 231, a base connected to the bottom end of the mixing hopper, a rotating belt connected to the base, and a motor for driving the belt to rotate.

[0035] The flipping mixing module includes a flipping chamber 51, a protective door 52 for sealing the flipping chamber 51, and a poison immersion operation device placed inside the flipping chamber 51.

[0036] The tilting chamber 51 includes a liquid filling platform 511 and a poison immersion platform 512 located below the liquid filling platform 511; the poison immersion operation device includes an automatic liquid dispenser 531 disposed on the liquid filling platform 511, an oscillation system disposed on the poison immersion platform 512, and a temperature control device disposed on the oscillation system; the automatic liquid dispenser 531 includes a solution storage tank 5312 disposed on the liquid filling platform 511, a peristaltic pump 5311 connected to the solution storage tank 5312 via a conduit, and a plurality of liquid filling ports 5313 connected to the peristaltic pump 5311 via conduits; the liquid filling ports 5313 are provided through... The liquid filling platform 511 is provided with the following: the oscillation system includes several oscillator fixing plates 5321 disposed on the toxic immersion platform 512, toxic immersion bottles 5322 disposed on the oscillator fixing plates 5321, an automatic capping device 5323 disposed above the toxic immersion bottles 5322, a toxic immersion bottle cap rotation and pressing mechanism 5324 for tightening the caps of the toxic immersion bottles on the automatic capping device 5323, and an oscillator rotating shaft 5325 connected to the oscillator fixing plates 5321; a protective door lifting mechanism 521 is provided on the protective door 52; and the liquid filling port 5313 includes an acid liquid filling port and a water liquid filling port.

[0037] This setup avoids the risk of sample contamination from manual operation, and automated operation greatly improves the accuracy and efficiency of the work, significantly reducing the physical exertion required for manual work.

[0038] Specifically, in some embodiments of the present invention, the filter press module includes a multi-layer filter press 61, a nitrogen generator 63 connected to the multi-layer filter press 61 via an air inlet pipe 62, and a filtrate receiver 64 for collecting the filtrate filtered by the multi-layer filter press 61; the multi-layer filter press 61 includes an outer filter chamber 611, an inner filter chamber 612 suspended within the outer filter chamber 611 via a support rod, and an inner cavity cover 613 placed on top of the inner filter chamber 612; the inner diameter of the outer filter chamber 611 is larger than the outer diameter of the inner filter chamber 612; the inner cavity cover 613 has an opening for the air inlet pipe 62 to deliver gas; the inner filter chamber 612 is placed within the outer filter chamber 611. Above 11, the bottom of the inner lamination chamber 612 is a closed structure, and several small holes with a diameter of 1 mm are provided in the middle of the side wall of the inner lamination chamber 612; the small holes are provided in the middle of the side wall of the inner lamination chamber 612, and the middle position is from 10 mm to 100 mm above the bottom surface of the inner lamination chamber 612; the small hole at the highest point of the inner lamination chamber 612 is flush with the top of the outer lamination chamber 611; the outer lamination chamber 611 and the inner lamination chamber 612 are connected by snap-fit, and the bottom end of the outer lamination chamber 611 is provided with a liquid outlet 6111, and a glass fiber filter membrane or microporous filter membrane with a pore size of 6 to 8 μm is placed at the bottom of the outer lamination chamber 611.

[0039] This setup first filters out large solid particles, then settles some fine powdery solid waste. This avoids a large amount of solid adhering to the filter membrane and tearing the filter paper, thus affecting the filtration efficiency. This makes the entire filtration process faster and achieves better solid-liquid separation.

[0040] The solid waste leaching toxicity leachate preparation system provided by the present invention will be specifically described below with reference to embodiments:

[0041] Example 1

[0042] This embodiment provides a solid waste leaching toxicity leachate preparation system, including: a sample stage 1, a crushing module and a mixing module, a robotic arm 3 for sending the sample on the sample stage 1 to the crushing module and the mixing module for processing, a weighing module 4 for weighing the sample processed by the crushing module and the mixing module, a flipping mixing module for conducting leaching experiments on the accurately weighed sample, and a pressure filter module for filtering the leachate processed by the flipping mixing module; a sample box 11 for loading the sample is placed on the sample stage 1.

[0043] The crushing module and mixing module include a screening mechanism, a crushing device, and a mixing device disposed on one side of the crushing device.

[0044] The screening mechanism includes a feed inlet 211, a screen with a hole diameter of 3mm disposed at the bottom end of the feed inlet 211, and a sliding device connected to the outer wall of the feed inlet 211; the sliding device includes a support frame 2121 for supporting the feed inlet 211 and connected to the outer wall of the feed inlet 211, and a slide rail 2122 for driving the support frame 2121 to slide left and right;

[0045] The crushing device includes a crusher inlet 221 located below the feed inlet 211, a crusher 222 connected to the bottom end of the crusher inlet 221, and a crusher outlet 223 connected to the output end of the crusher 222.

[0046] The mixing device includes a mixer inlet 231 located on one side of the crusher inlet 221 and below the feed inlet 211, a mixer 232 connected to the bottom end of the mixer inlet 231, and a mixer outlet 233 connected to the output end of the mixer 232.

[0047] The flipping mixing module includes a flipping chamber 51, a protective door 52 for sealing the flipping chamber 51, and a poison immersion operation device placed inside the flipping chamber 51.

[0048] The tilting chamber 51 includes a liquid filling platform 511 and a poison immersion platform 512 located below the liquid filling platform 511; the poison immersion operation device includes an automatic liquid dispenser 531 disposed on the liquid filling platform 511, an oscillation system disposed on the poison immersion platform 512, and a temperature control device disposed on the oscillation system; the automatic liquid dispenser 531 includes a solution storage tank 5312 disposed on the liquid filling platform 511, a peristaltic pump 5311 connected to the solution storage tank 5312 via a conduit, and a plurality of liquid filling ports 5313 connected to the peristaltic pump 5311 via conduits; the liquid filling ports 5313 are provided through... The liquid filling platform 511 is provided with the following: the oscillation system includes several oscillator fixing plates 5321 disposed on the toxic immersion platform 512, toxic immersion bottles 5322 disposed on the oscillator fixing plates 5321, an automatic capping device 5323 disposed above the toxic immersion bottles 5322, a toxic immersion bottle cap rotation and pressing mechanism 5324 for tightening the caps of the toxic immersion bottles on the automatic capping device 5323, and an oscillator rotating shaft 5325 connected to the oscillator fixing plates 5321; a protective door lifting mechanism 521 is provided on the protective door 52; and the liquid filling port 5313 includes an acid liquid filling port and a water liquid filling port.

[0049] The filter press module includes a multi-layer filter press 61, a nitrogen generator 63 connected to the multi-layer filter press 61 via an air inlet pipe 62, and a filtrate receiver 64 for collecting the filtrate filtered by the multi-layer filter press 61. The multi-layer filter press 61 includes an outer filter chamber 611, an inner filter chamber 612 suspended within the outer filter chamber 611 by a support rod, and an inner cover 613 placed on top of the inner filter chamber 612. The inner diameter of the outer filter chamber 611 is larger than the outer diameter of the inner filter chamber 612. The inner cover 613 has an opening for gas delivery via the air inlet pipe 62. The inner filter chamber 612 is placed... Above the outer layer filter chamber 611, the bottom of the inner layer filter chamber 612 is a closed structure. Several small holes with a diameter of 1 mm are provided in the middle of the side wall of the inner layer filter chamber 612. The middle position is from 10 mm above the bottom surface of the inner layer filter chamber 612 to within 100 mm above it. The small hole at the highest point of the inner layer filter chamber 612 is flush with the top of the outer layer filter chamber 611. The outer layer filter chamber 611 and the inner layer filter chamber 612 are connected by snap-fit. The bottom end of the outer layer filter chamber 611 is provided with a liquid outlet 6111. A microporous filter membrane with a pore size of 6 μm is placed at the bottom of the outer layer filter chamber 611.

[0050] The specific process of this embodiment is described below:

[0051] (1) The target solid waste sample is loaded into the sample box 11 and the sample boxes 11 are placed on the sample stage 1 in sequence;

[0052] (2) After the robotic arm 3 picks up the sample box 11 and sends it to the feed inlet 211 of the screening mechanism, it places the empty sample box 11 at the outlet of the mixing tank.

[0053] (3) The sliding device drives the feed inlet 211 to shake for 5 minutes, so that the sample with the small particle size requirement can fall through the screen into the mixing tank inlet and then into the mixing tank.

[0054] (4) After screening, start the servo motor, and the ball screw drives the robotic arm 3 to clamp the feed port 211 and transfer it along the slide rail 2122 to the crusher inlet 221. The sample that does not meet the particle size requirements in the feed port 211 is poured into the crusher 222. The sample is crushed into small particle size in the crusher 222. The crushed sample then enters the sample box 11 through the crusher outlet 223. Then the robotic arm 3 picks up the sample box 11 and puts it back into the feed port 211 until all the sample passes through the screen and enters the mixing tank.

[0055] (5) After the target sample is fully mixed in the mixing tank, it enters the sample box 11 through the mixer outlet 233, and then the robotic arm 3 picks up the sample box 11 and moves it to the weighing station of the weighing module 4 for weighing.

[0056] (6) The weighed sample is sent to the poison immersion bottle 5322 below the weighing station, and then sent to the inverted mixing module;

[0057] (7) After calculating the amount of extractant to be added based on the sample mass and moisture content, the target extractant is added to the poison flask 5322 containing the target sample by controlling the automatic liquid adder 531 through the peristaltic pump at a solid-liquid ratio of 10:1, including the acid adder 5331 and the water adder 5332, wherein the amount added is accurate to 0.1 mL.

[0058] (8) The bottle is then placed on the oscillator fixing plate 5321 and capped by the automatic capping device 5323. The cap is then tightened by the cap rotation and pressing mechanism 5324 to ensure no leakage during the inversion. After the cap is tightened, the protective door lifting mechanism 521 is activated, causing the protective door 52 to descend and seal the inversion chamber 51. At the same time, the heating device at the bottom of the oscillator fixing plate 5321 is activated to control the temperature of the sealed space at 23±2℃. Then the oscillator shaft 5325 drives the toxic bottle 5322 to invert and rotates continuously at a speed of 30±2r / min for 18 hours before automatically stopping.

[0059] (9) After leaching, remove the toxic leaching bottle 5322, open the inner cavity cover 613 at the top of the inner lamination filter chamber 612, and let the solid-liquid mixture in the leached sample enter the inner lamination filter chamber 612; at the same time, close the inner cavity cover 613 and turn on the nitrogen generator 63. Then, under the pressure of nitrogen, the liquid will flow into the outer lamination filter chamber 611 through the small hole in the middle of the outer wall of the inner lamination filter chamber 612. Large particles will be intercepted into the inner lamination filter chamber 612; some of the fine particles can also flow into the outer lamination filter chamber 611. At this time, the microporous filter membrane with a pore size of 6μm placed at the bottom of the outer lamination filter chamber 611 can further filter the liquid; finally, the filtrate flows out through the outlet and is collected by the filtrate receiver 64 for subsequent detection.

[0060] In summary, the solid waste leaching toxicity leachate preparation system provided by this invention, through the configuration of a sample stage, a crushing module and a mixing module, a robotic arm for delivering the sample on the sample stage to the crushing and mixing modules for processing, a weighing module for weighing the sample processed by the crushing and mixing modules, a flipping mixing module for conducting leaching experiments on the accurately weighed sample, and a pressure filtration module for filtering the leachate processed by the flipping mixing module, not only avoids the risk of sample contamination from manual operation, but also greatly improves the accuracy and efficiency of the work through automated operation, significantly reducing the physical intensity of manual labor. In addition, by designing a double-layer pressure filtration device, large particles of solid waste are first filtered out, and then some fine powdery solid waste is settled, avoiding the subsequent adhesion of a large amount of solids to the filter membrane, which could damage the filter paper and affect the pressure filtration efficiency. This makes the entire pressure filtration process faster and achieves excellent solid-liquid separation.

[0061] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A system for preparing toxic leachate from solid waste, characterized in that, include: The sample stage, the crushing module and the mixing module, the robotic arm for sending the sample on the sample stage to the crushing module and the mixing module for processing, the weighing module for weighing the sample after being processed by the crushing module and the mixing module, the flipping mixing module for conducting leaching experiments on the accurately weighed sample, and the pressure filter module for filtering the leachate after being processed by the flipping mixing module. The crushing module and mixing module include a screening mechanism, a crushing device for crushing samples whose particle size does not meet the target requirements, and a mixing device disposed on one side of the crushing device. The flipping mixing module includes a flipping chamber, a protective door for sealing the flipping chamber, and a toxic immersion operation device placed inside the flipping chamber. The flipping chamber includes a liquid filling platform and a poison immersion platform located below the liquid filling platform; the poison immersion operation device includes an automatic liquid dispenser installed on the liquid filling platform, an oscillation system installed on the poison immersion platform, and a temperature control device installed on the oscillation system. The filter press module includes a multi-layer filter press, a nitrogen generator connected to the multi-layer filter press via an air inlet pipe, and a filtrate receiver for collecting the filtrate filtered by the multi-layer filter press. The multi-layer filter press includes an outer filter chamber, an inner filter chamber suspended within the outer filter chamber by a support rod, and an inner cover placed on top of the inner filter chamber. The inner diameter of the outer filter chamber is larger than the outer diameter of the inner filter chamber. The inner filter chamber is positioned above the outer filter chamber, and several small holes are provided in the middle of the sidewall of the inner filter chamber. The highest hole in the inner filter chamber is flush with the top of the outer filter chamber. A liquid outlet is provided at the bottom of the outer filter chamber, and a filter membrane is placed at the bottom of the outer filter chamber. The filter membrane includes either a glass fiber filter membrane or a microporous filter membrane. The screening mechanism includes a feed inlet, a screen disposed at the bottom end of the feed inlet, and a sliding device connected to the outer wall of the feed inlet. The crushing device includes a crusher inlet located below the feed inlet, a crusher connected to the bottom end of the crusher inlet, and a crusher outlet connected to the output end of the crusher. The mixing device includes a mixing inlet located on one side of the crusher inlet and below the feed inlet, a mixing machine connected to the bottom end of the mixing inlet, and a mixing outlet connected to the output end of the mixing machine.

2. The solid waste leaching toxicity leachate preparation system according to claim 1, characterized in that: The sliding device includes a support frame for supporting the feed inlet and connected to the outer wall of the feed inlet, and a slide rail for driving the support frame to slide left and right.

3. The solid waste leaching toxicity leachate preparation system according to claim 1, characterized in that: The automatic liquid dispenser includes a solution storage tank disposed on the liquid dispensing platform, a peristaltic pump connected to the solution storage tank via a conduit, and a plurality of liquid dispensing ports connected to the peristaltic pump via conduits; the liquid dispensing ports are disposed through the liquid dispensing platform, and the liquid dispensing ports include acid liquid dispensing ports and water liquid dispensing ports.

4. The solid waste leaching toxicity leachate preparation system according to claim 1, characterized in that: The oscillation system includes several oscillator fixing plates set on the oscillator fixing plate, oscillator bottles placed on the oscillator fixing plate, an automatic capping device set above the oscillator bottles, a oscillator bottle cap rotation and pressing mechanism for tightening the caps of the oscillator bottles on the automatic capping device, and an oscillator shaft connected to the oscillator fixing plate.

5. The solid waste leaching toxicity leachate preparation system according to claim 1, characterized in that: The protective door is equipped with a lifting mechanism.

6. The solid waste leaching toxicity leachate preparation system according to claim 1, characterized in that: A sample box for loading samples is placed on the sample stage.

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