Cleaning system

Abstract

The utility model relates to the technical field of potash fertilizer, specifically relates to a cleaning system. The cleaning system includes mining unit and conveying unit, and the mining unit includes at least one mining device, and the mining device includes continuous miner, mounting platform and belt transfer conveyor, the tail of continuous miner is connected with the mounting platform to move synchronously under the drive of continuous miner, the belt transfer conveyor extends along the first direction and is installed on the mounting platform, the belt transfer conveyor is used for receiving the tail salt of continuous miner mining and conveying and conveying the tail salt along the first direction, wherein, the first direction is orthogonal to the tunneling direction of continuous miner, the conveying unit is located on one side of the belt transfer conveyor and below the belt transfer conveyor in the first direction, and is used for receiving and conveying the tail salt conveyed by the belt transfer conveyor. The cleaning system of the utility model embodiment can improve the cleaning efficiency of the tail salt.

Description

Technical Field

[0001] This utility model relates to the field of potash fertilizer technology, specifically to a cleaning system. Background Technology

[0002] The main production process of potash fertilizer involves extracting intercrystalline brine from salt lake strata, transporting it to salt fields, where it undergoes natural solar evaporation to form carnallite, and then using inorganic chemical processes to extract potassium chloride to produce potash fertilizer. While the commonly used cold crystallization-positive flotation process can effectively extract potassium chloride, it generates a large amount of tailings brine. Sodium chloride in the tailings brine gradually deposits in the tailings ponds, reducing the effective volume of the brine ponds, prolonging the evaporation cycle, and severely limiting the efficiency of potash fertilizer production.

[0003] In related technologies, excavators typically dredge the scattered tailings from the bottom of the salt pond and pile them up in designated areas on both sides of the salt pond ditch. A loading machine then enters the designated area, shovels the piled tailings, and loads them into truck beds. The trucks, now full of tailings, drive away from the salt pond, transporting the tailings to a designated off-site storage point for unloading. However, the operational continuity between the excavators, loading machines, and trucks in these technologies is poor, resulting in low tailings cleanup efficiency. Utility Model Content

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose a cleaning system that can improve the cleaning efficiency of tailings.

[0005] The cleaning system of this utility model embodiment includes: a mining unit, which includes at least one mining device, the mining device including a continuous miner, an installation platform, and a belt conveyor, the installation platform being connected to the tail of the continuous miner to move synchronously under the drive of the continuous miner, the belt conveyor extending along a first direction and installed on the installation platform, the belt conveyor being used to receive tailings transported by the continuous miner and transport the tailings along the first direction, wherein the first direction is orthogonal to the mining direction of the continuous miner; and a conveying unit, which is located on one side of the belt conveyor and below the belt conveyor in the first direction, and is used to receive and transport the tailings transported by the belt conveyor.

[0006] The cleaning system of this utility model continuously mines tailings salt in the salt pond through the autonomous movement of the continuous mining machine in the mining unit, and continuously transports the mined tailings salt to the belt conveyor. The belt conveyor transports the tailings salt to the conveying unit, and then the conveying unit transports the tailings salt to the storage location, realizing continuous transportation of tailings salt in the salt pond to the storage location, which helps to improve the cleaning efficiency of tailings salt in the salt pond.

[0007] In some embodiments, there are multiple mining devices arranged side by side in the first direction, and the belt conveyor extends toward the conveying unit and is arranged at an upward inclination. The tail of the belt conveyor furthest from the conveying unit in two adjacent belt conveyors overlaps the head of the belt conveyor adjacent to the conveying unit.

[0008] In some embodiments, the overlap distance between two adjacent belt conveyors is 0.4m-0.6m.

[0009] In some embodiments, the continuous mining machine is a tracked continuous mining machine, and the mining section of the tracked continuous mining machine has multiple adjustable-pitch crushing teeth.

[0010] In some embodiments, the belt conveyor includes a support frame, a wear-resistant rubber belt, and a drive motor. The wear-resistant rubber belt is mounted on the support frame, and the drive motor is mounted on the support frame to drive the wear-resistant rubber belt to move. The support frame is a stainless steel support frame, and the drive motor is a corrosion-resistant motor.

[0011] In some embodiments, the surface of the abrasion-resistant rubber belt is provided with spaced protrusions.

[0012] In some embodiments, the conveying unit includes a belt conveyor disposed on one side of the belt transfer conveyor in the first direction, the belt conveyor extending along the tunneling direction of the continuous mining machine, and the belt conveyor being used to receive and convey the tailings conveyed by the belt transfer conveyor.

[0013] In some embodiments, the conveying unit further includes a mixer, a conveying pump, and a conveying pipe. The mixer is used to receive and mix the conveying medium and the tailings conveyed by the belt conveyor to form a mixture. The conveying pump is located on the conveying pipe and connected to the mixer. The conveying pipe is used to convey the mixture.

[0014] In some embodiments, the conveying medium is saturated brine; and / or, the concentration of the mixture is 60%-70%.

[0015] In some embodiments, the conveying unit is a truck, which is used to receive and transport tailings conveyed by the belt conveyor. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the cleaning system according to an embodiment of the present invention.

[0017] Figure 2 This is a partial schematic diagram of the cleaning system according to an embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the mining device of the cleaning system according to an embodiment of the present utility model.

[0019] Figure 4 This is a schematic diagram of the tape transfer conveyor of the cleaning system according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of a cleaning system according to another embodiment of the present invention.

[0021] Figure label: Mining unit 1, mining device 11, continuous miner 111, mining section 1111, salt removal section 1112, material guiding section 1113. Install platform 112, Belt conveyor 113, support frame 1131, wear-resistant rubber belt 1132. Conveying unit 2, belt conveyor 21, Mixer 22, delivery pump 23, delivery pipe 24, Truck 25. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] The following is in conjunction with the appendix Figures 1-5 The cleaning system of this utility model embodiment will be described in detail.

[0024] The cleaning system of this embodiment includes a mining unit 1 and a conveying unit 2. The mining unit 1 includes at least one mining device 11, which includes a continuous miner 111, an installation platform 112, and a belt conveyor 113. The installation platform 112 is connected to the tail of the continuous miner 111 to move synchronously under the drive of the continuous miner 111. The belt conveyor 113 extends along a first direction and is installed on the installation platform 112. The belt conveyor 113 is used to receive the tailings transported by the continuous miner and convey the tailings along the first direction, wherein the first direction is orthogonal to the mining direction of the continuous miner 111. The conveying unit 2 is located on one side of the belt conveyor 113 and below the belt conveyor 113 in the first direction, and is used to receive and transport the tailings transported by the belt conveyor 113.

[0025] The cleaning system of this utility model continuously mines tailings salt in the salt pond through the autonomous movement of the continuous mining machine 111 in the mining unit 1, and continuously transports the mined tailings salt to the belt conveyor 113. The belt conveyor 113 then transports the tailings salt to the conveying unit 2, and then the conveying unit 2 transports the tailings salt to the storage location, thereby realizing continuous transportation of tailings salt from the salt pond to the storage location and improving the cleaning efficiency of tailings salt in the salt pond.

[0026] Specifically, such as Figures 1-3 As shown, the installation platform 112 is connected to the tail of the continuous miner 111, so that the installation platform 112 moves synchronously with the continuous miner 111 during the mining process. By installing the belt conveyor 113 on the installation platform 112, the tailings mined by the continuous miner 111 can be continuously transported to the belt conveyor 113, and then transported to the conveying unit 2 through the belt conveyor 113, so as to realize the uninterrupted transfer of tailings.

[0027] Optionally, the belt conveyor 113 is detachably mounted on the mounting platform 112, and the conveying length of the belt conveyor 113 is 4.5-5.5m, which matches the width of the continuous mining machine 111.

[0028] For ease of description, this embodiment takes the mining direction of the continuous mining machine 111 as being consistent with the front-to-back direction and the first direction as being consistent with the left-to-right direction as an example. The continuous mining machine 111 mines tailings in a back-to-forward direction. The mined tailings are transported to the tail of the continuous mining machine 111 and transferred to the belt conveyor 113. The conveying unit 2 is located on the right side of the belt conveyor 113. The belt conveyor 113 transports the received tailings to the conveying unit 2 in a left-to-right direction. The conveying unit 2 transports the tailings to the storage location.

[0029] Optionally, there can be one or more mining devices 11. When there is one mining device 11, it is arranged in the salt pond, and the continuous miner 111 mines the tailings and transports them to the belt conveyor 113. When there are multiple mining devices 11, they are arranged side by side in the first direction, and the continuous miners 111 simultaneously mine the tailings in the salt pond and transport the mined tailings to the belt conveyor 113 corresponding to each continuous miner 111. The belt conveyor 113 then transports the tailings to the conveying unit 2. The number of mining devices 11 can be determined according to the width of the salt pond to be cleaned. When the salt pond is narrow, only one mining device 11 can be set up. When the salt pond is wide, multiple mining devices 11 can be set up side by side to increase the mining width of the mining unit 1 and improve mining efficiency.

[0030] Optionally, the continuous mining machine 111 includes a mining section 1111, a salt-scraping section 1112, and a conveying section 1113. The mining section 1111 is used to mine tailings in the salt pond. The salt-scraping section 1112 is used to collect the tailings mined by the mining section 1111 to the conveying section 1113. The conveying section 1113 is used to transport the tailings to the tail end of the continuous mining machine 111. The belt conveyor 113 is used to receive the tailings transported by the conveying section 1113 of the continuous mining machine 111 and transport the tailings to the conveying unit 2.

[0031] In some embodiments, there are multiple mining devices 11, which are arranged side by side in a first direction. The belt conveyor 113 extends in the direction toward the conveying unit 2 and is arranged at an upward inclination. The tail of the belt conveyor 113 that is far from the conveying unit 2 among two adjacent belt conveyors 113 overlaps the head of the belt conveyor 113 that is adjacent to the conveying unit 2.

[0032] Specifically, such as Figures 1-4 As shown, the mining devices 11 are arranged side by side in the left-right direction. Each mining device 11 includes a continuous miner 111, an installation platform 112, and a belt conveyor 113. Two adjacent continuous miners 111 are arranged side by side in the left-right direction, two adjacent installation platforms 112 are arranged side by side in the left-right direction, and two adjacent belt conveyors 113 are arranged side by side in the left-right direction. The belt conveyor 113 extends towards the conveying unit 2 and is arranged at an upward inclination. Among two adjacent belt conveyors 113, the belt conveyor 113 on the left is farther away from the conveying unit 2 than the belt conveyor 113 on the right. The tail of the belt conveyor 113 on the left overlaps the head of the belt conveyor 113 on the right, and the tail of the belt conveyor 113 on the right overlaps the head of the belt conveyor 113 on its right or overlaps above the conveying unit 2.

[0033] In this embodiment, the tail end of the belt conveyor 113 furthest from the conveying unit 2 is overlapped with the head end of the belt conveyor 113 adjacent to the conveying unit 2. This allows the tail salt being transported on the belt conveyor 113 furthest from the conveying unit 2 to be transported to the belt conveyor 113 adjacent to the conveying unit 2, thus realizing the transport of tail salt between the two adjacent belt conveyors 113. This, in turn, enables the transport of tail salt from multiple belt conveyors 113 to the conveying unit 2, improving the convenience of transport.

[0034] It is understood that "overlap" does not refer to the mutual contact between two adjacent belt conveyors 113, but rather to the tail of one belt conveyor 113 being above the head of the other belt conveyor 113 and the two belt conveyors 113 having an overlapping portion, ensuring that the tail salt conveyed on one belt conveyor 113 can be conveyed to the other belt conveyor 113.

[0035] Optionally, the mining device 11 can be two, three, four, five, or six.

[0036] In some embodiments, such as Figure 4 As shown, the overlap distance between two adjacent conveyor belts is 0.4m-0.6m. This embodiment limits the overlap distance between two adjacent conveyor belts 113 to prevent tailings from spilling between them, improving the stability and continuity of the tailings transport process, enabling large-section mining of the brine pool in a single operation, significantly increasing the tailings transport volume per unit time, and thus improving cleaning efficiency.

[0037] Optionally, the overlap distance is 0.4m, 0.45m, 0.5m, 0.55m, or 0.6m.

[0038] In some embodiments, the continuous mining machine 111 is a tracked continuous mining machine 111, and the mining section 1111 of the tracked continuous mining machine 111 has a plurality of adjustable pitch breaking teeth.

[0039] Specifically, the track width is set at 550mm, the ground pressure is less than or equal to 0.07MPa, and the thickness of the sediment layer is less than or equal to 1.8m, which allows the tracked continuous mining machine 111 to move smoothly on the sodium chloride sediment layer in the brine pool and avoid the track getting stuck in salt.

[0040] Optionally, the tooth pitch of the crushing teeth is 150mm-200mm. By setting the crushing teeth with adjustable tooth pitch, the mining section 1111 of the continuous mining machine 111 can not only crush sodium chloride agglomerate layers with a hardness of less than or equal to 6MPa, but also efficiently mine loose granular salt. The mining efficiency is 40% higher than that of traditional excavators. The continuous mining machine 111 has higher adaptability and mining efficiency.

[0041] Understandably, the 111 continuous mining machine can also adopt a non-tracked structure.

[0042] In some embodiments, the belt conveyor 113 includes a support 1131, a wear-resistant rubber belt 1132, and a drive motor. The wear-resistant rubber belt 1132 is mounted on the support 1131, and the drive motor is mounted on the support 1131 to drive the wear-resistant rubber belt 1132 to move. The support 1131 is a stainless steel support 1131, and the drive motor is a corrosion-resistant motor.

[0043] Specifically, the mounting bracket 1131 is a flatbed trailer, which is connected to the continuous mining machine 111 via rigid connectors to ensure synchronous and stable movement, adapting to the soft salt layer of the brine pool. A 5m long conveyor belt 113 is mounted on the flatbed trailer. The conveyor belt 113 uses a wear-resistant rubber belt 1132 and a stainless steel bracket 1131. The drive motor features an explosion-proof and corrosion-resistant design, capable of withstanding the high salt spray environment of the salt lake, and its service life is more than three times longer than that of a traditional general-purpose conveyor belt 113.

[0044] In some embodiments, the surface of the abrasion-resistant rubber belt 1132 is provided with spaced protrusions.

[0045] Specifically, the surface of the wear-resistant rubber belt 1132 is provided with anti-slip protrusions, the distance between two adjacent anti-slip protrusions is 35-45mm, and the height of the protrusions is 7-9mm. By providing protrusions on the wear-resistant rubber belt 1132, tailings can be prevented from slipping due to vibration during the transfer process, thereby improving the tailings conveying efficiency.

[0046] This embodiment rigidly connects a flatbed trailer to the tail of the tracked continuous mining machine 111, and integrates a 5m long explosion-proof and corrosion-resistant conveyor belt 113 on the flatbed trailer, forming an integrated structure for conveyor belt transfer at the tail of mining. This breaks through the limitation of the traditional continuous mining machine 111, which can only mine and needs to rely on external equipment for transfer, and realizes the transfer of tailings salt mining. At the same time, the wide track and low ground pressure design ensure that the equipment moves smoothly on the soft salt layer of the brine pool, solving the problem of traditional excavators easily getting stuck in salt.

[0047] By setting up the belt conveyor 113 at the tail of the continuous mining machine 111 and the cooperative structure of the belt conveyor 21, it is possible to support the parallel operation of 2 to 5 tracked continuous mining machines 111. The tail of a single continuous mining machine 111 can be connected to the feed end of the belt conveyor 113 at the tail of the adjacent continuous mining machine 111 through the discharge end of the belt conveyor 113. This enables the tailings mined by multiple continuous mining machines 111 to be simultaneously drawn into the belt conveyor 21, forming a multi-machine-to-one-belt transfer pattern. This breaks through the bottleneck of traditional single-machine operation and the inability of equipment to coordinate, realizes large-section one-time advance mining of brine pool, and achieves integrated mining and transportation, improving the efficiency of tailings cleaning.

[0048] In some embodiments, the conveying unit 2 includes a belt conveyor 21, which is located on one side of the belt transfer conveyor 113 in a first direction. The belt conveyor 21 extends along the tunneling direction of the continuous mining machine 111 and is used to receive and convey the tailings conveyed by the belt transfer conveyor 113.

[0049] Specifically, such as Figure 2 As shown, belt conveyor 21 is located on the right side of belt transfer conveyor 113. Belt conveyor 21 is used to receive tailings conveyed by belt transfer conveyor 113 and to transport tailings in a backward-forward direction to the storage location.

[0050] The belt of conveyor 21 is made of polyester canvas skeleton and neoprene rubber covering, making the surface of the belt resistant to salt corrosion and wear. The support frame of conveyor 21 is made of Q235 carbon steel with anti-corrosion coating. The bottom of the support frame is equipped with adjustable support legs (adjustable height 0.3m to 0.8m), which can adjust the height of conveyor 21 according to the terrain of the brine pool edge to ensure stable transport of tailings and avoid tailings spillage and loss.

[0051] It is understandable that the belt conveyor 113 can be made of the same material as the belt conveyor 21.

[0052] In some embodiments, the conveying unit 2 further includes a mixer 22, a conveying pump 23, and a conveying pipe 24. The mixer 22 is used to receive and mix the conveying medium and the tailings conveyed by the belt conveyor 21 to form a mixture. The conveying pump 23 is disposed on the conveying pipe 24 and connected to the mixer 22. The conveying pipe 24 is used to convey the mixture.

[0053] Specifically, such as Figure 2 As shown, the mixer 22 is a vertical high-efficiency mixer with a volume of 5 cubic meters. The mixer 22 has double-layer spiral mixing blades on the mixing shaft. The mixing blades are made of NM450 wear-resistant steel, which can realize the rapid mixing of tailings and conveying medium. The mixing speed is greater than or equal to 600 r / min and the mixing time is less than or equal to 3 min to form a uniform mixture, thus avoiding the tailings from clumping in the mixing drum.

[0054] The feed inlet of the mixer 22 is connected to the discharge end of the belt conveyor 21 to receive the tail salt conveyed by the belt conveyor 21. The mixer 22 is connected to the conveying medium to receive the conveying medium. The conveying medium and the tail salt are mixed evenly in the mixer 22 to form a mixture. The tail salt is conveyed by conveying the mixture.

[0055] Different conveying pumps 23 are configured according to the conveying distance. When the conveying distance is less than or equal to 5km, a slurry pump is used, with a conveying flow rate greater than or equal to 200 cubic meters per hour and a head greater than or equal to 50m, suitable for short-distance conveying. When the conveying distance is greater than 5km, a plunger pump is used, with a pressure greater than or equal to 10MPa and a flow rate greater than or equal to 150 cubic meters per hour, suitable for long-distance conveying.

[0056] The delivery pipe 24 is made of ultra-high molecular weight polyethylene (UHMWPE), which is resistant to salt corrosion and wear, and has a service life of 8 to 10 years, avoiding the problem of frequent replacement caused by corrosion in traditional truck bodies.

[0057] Optionally, the conveying unit 2 may also include only the belt conveyor 21, which directly transports the tailings to the storage location. However, considering the high cost of the belt conveyor 21, this embodiment uses a conveying medium to mix with the tailings to form a mixture for transport, which can achieve continuous transport of tailings and high transport efficiency.

[0058] In some embodiments, the conveying medium is saturated brine.

[0059] This embodiment sets the conveying medium to saturated brine, which can be used directly in the salt lake potash fertilizer production process without the need to introduce additional clean water, thus avoiding disruption of the salt lake brine composition balance. Moreover, the tail salt is insoluble in the saturated brine, and the saturated brine only serves to transport the tail salt. After the tail salt is transported to the storage location, the protective brine is returned, realizing the repeated recycling of the protective brine.

[0060] In this embodiment, a mixer 22 is connected to the discharge end of the belt conveyor 21. The saturated brine in the salt lake production is used as the slurry medium. No additional water is needed. The tail salt and saturated brine are quickly mixed by the double-layer spiral mixing blades to form a uniform slurry with a concentration of 60% to 70%. The slurry is then transported to the stockpile by a different conveying pump 23 according to the conveying distance. This can overcome the limitations of traditional truck solid transportation, realize the continuous transportation of tail salt slurry, and avoid salt dust diffusion and transportation losses.

[0061] In some embodiments, the concentration of the mixture is 60%-70%.

[0062] This embodiment limits the mixing concentration of saturated brine and tailings to ensure thorough mixing and the formation of a uniform tailings slurry, thereby ensuring the slurry's fluidity and transport stability. Furthermore, the slurry is directly transported to the off-site tailings storage yard via a slurry pump or plunger pump, eliminating the need for frequent loading, unloading, and back-and-forth trips required by traditional truck transportation. This not only avoids salt dust diffusion and loss during solid tailings transportation but also significantly shortens the transport cycle from the brine pool to the storage yard. Moreover, slurry transport can be carried out continuously around the clock, unaffected by the large diurnal temperature variations and severe weather in the salt lake area, further ensuring the continuity of the cleanup operation.

[0063] In this embodiment, the belt conveyor 21 transports tailings to the mixer 22, while simultaneously injecting saturated brine from salt lake production into the mixer 22. The mass ratio of saturated brine to tailings is 1:1.5 to 1:2.23. The mixer 22 is started, and the tailings are stirred by double-layer spiral stirring blades at a speed of 550 to 650 r / min for 2 to 4 minutes, forming a tailings slurry with a concentration of 60% to 70%. Then, depending on the conveying distance, the tailings slurry is transported to the tailings storage area using a slurry pump or a plunger pump. The mixing drum of the mixer 22 is made of NM450 wear-resistant steel. Using saturated brine as the conveying medium avoids water waste and compositional imbalance of the salt lake brine. Furthermore, the slurrying parameters (concentration, stirring speed) and pump type can be specifically set according to the characteristics of the tailings, resulting in better conveying efficiency.

[0064] In this embodiment, a tracked continuous mining machine 111 is arranged in parallel above the sodium chloride sediment layer in the brine pool to achieve in-situ mining of the sodium chloride sediment layer. The belt conveyor 113 at the tail of the continuous mining machine 111 is connected to the belt conveyor 21 to achieve uninterrupted transfer of tailings from the mining point to the conveying point. The belt conveyor 21 is connected to the mixer 22. The outlet of the mixer 22 is connected to the inlet of the conveying pump 23. The outlet of the conveying pump 23 is connected to the conveying pipe 24. The slurry is transported to the tailings stockpile through the conveying pipe 24. After the tailings are converted into slurry, they are efficiently transported to the stockpile. This forms a tailings cleaning mode of "synchronous mining and transportation, multi-machine collaboration, and large-scale operation", which is suitable for the large-section cleaning needs of brine pools and the high-salinity working environment of salt lakes. The entire cleaning and conveying process can be controlled by a PLC controller, which can link the mining speed of the continuous mining machine 111, the speed of the belt conveyor 21, the rotation speed of the mixer 22 and the conveying capacity of the conveying pump 23 to achieve continuous conveying of tailings. Moreover, the tailings cleaning efficiency is high, the cost is low and the environmental protection is good.

[0065] The tailings cleaning system in this embodiment integrates tailings mining and transportation, breaking the limitations of discrete, step-by-step operations, reducing equipment downtime, and improving overall equipment utilization. This meets the continuous operation requirements of large-scale tailings cleaning, solves the problem of tailings accumulation restricting potash fertilizer production, and improves operational efficiency and continuity. By reducing salt dust generation and high-salt wastewater leakage, the pollution of the surrounding ecological environment during tailings cleaning is reduced, meeting the requirements of green development of salt lake resources and enhancing environmental performance. Replacing general-purpose equipment with corrosion-resistant and wear-resistant specialized equipment extends equipment lifespan, reduces maintenance and replacement frequency, and optimizes manual operation processes, reducing reliance on manual labor. Ultimately, this achieves effective cost control and reduces overall operation and maintenance costs.

[0066] In some embodiments, the conveying unit 2 is a truck 25, which is used to receive and convey tailings conveyed by the belt conveyor 113.

[0067] Specifically, such as Figure 5 As shown, when the width of the salt pond or brine conveying channel is not very large (e.g., 5m to 10m), one or two mining devices 11 can be used for parallel mining, which can complete the mining of the entire width of the salt pond or brine conveying channel in one go. Since the width of the salt pond or brine conveying channel is not very wide, the amount of tailings extracted in one go will not be large. The extracted tailings do not need to be transported by belt conveyor 21 and mixer 22. The tailings transported by the belt transfer conveyor 113 at the tail of the continuous mining machine 111 can be directly transported to the transport truck 25 for transportation, which reduces the cleaning cost while meeting the transportation efficiency requirements.

[0068] The cleaning system in this embodiment enables continuous, integrated, and large-scale efficient cleaning operations when cleaning sodium chloride in salt lake brine ponds. Compared with the step-by-step "digging-loading-transporting" process in related technologies, it has significant advantages in terms of operational efficiency, environmental performance, cost control, and scenario adaptability, thus improving cleaning efficiency.

[0069] Firstly, in terms of cleaning efficiency, this embodiment significantly improves large-scale cleaning capabilities by moving from discrete waiting to continuous high efficiency. The excavation-loading-transport process in related technologies follows a discrete logic of "excavator digging and storing salt → front-end loader loading salt → truck transport and storage." Each step relies on manual coordination, resulting in severe downtime and waiting issues. The excavator must complete the storage in a designated area before the front-end loader can enter to load salt; while loading salt, the front-end loader must wait for truck rotation. If the transportation distance exceeds 1km, the extended truck return time will also cause the front-end loader to stop idle, ultimately resulting in an overall equipment efficiency of less than 65%. Even a 20t-class excavator can only maintain a daily cleaning volume of ≤300 cubic meters, which is insufficient to meet the cleaning needs of large-scale sodium chloride deposition in brine ponds. This invention, through the cooperation of the mining unit 1, belt conveyor 21, and mixer 22, completely breaks through the limitations of discrete operations. On the one hand, the continuous mining machine 111 and the belt transfer conveyor 113 at the tail of the continuous mining machine 111 enable the mining unit 1 to perform both mining and tail belt transfer functions. The mined tailings can be directly transferred to the belt conveyor 21 without intermediate storage, eliminating intermediate links and reducing the loss rate to below 5%, thus reducing resource waste. On the other hand, multiple continuous mining machines 111 can achieve parallel operation through tail belt overlap. The tailings flow synchronously to the belt conveyor 21, and after being slurried by the mixer 22, they are continuously transported to the stockpile through the conveyor pipe 24 and the conveyor pump 23, with uninterrupted flow throughout the process and no intermediate storage. According to statistics, in actual applications, a single 20t excavator can clean up to 1500m³ per day. 3 ~3000m 3 A single continuous mining machine (111) can process approximately 8000 m³ per day. 3 ~10000m 3 (Based on a single excavation width of 3m and a depth of 1.5m, with a daily excavation depth of 2000m), when 2 to 4 continuous mining machines operate in parallel, the overall efficiency of the equipment is increased by 20 times. It can also achieve large-section excavation of brine pools in one go, quickly restore the evaporation capacity of brine pools, and effectively solve the core problem of tailings deposition restricting potash fertilizer production.

[0070] Secondly, in terms of environmental performance, this embodiment achieves a transformation from secondary pollution to green and clean practices, significantly reducing the impact on the ecosystem. The environmental shortcomings of the excavation-loading-transportation process in related technologies are prominent. When the front-loading machine loads tailings, it generates a large amount of salt dust, which spreads with the bumps during truck transportation, polluting the surrounding air environment. Furthermore, if anti-seepage measures are inadequate during transportation, high-salt wastewater can easily leak into the soil and groundwater, causing soil salinization and groundwater pollution, which contradicts the concept of green development of salt lake resources. This embodiment reduces salt dust generation by slurrying the tailings and transporting it over long distances, with the transport pipe 24 sealed. The salt dust emission concentration is far lower than that in related technologies. Moreover, the use of slurry transport, where the tailings are slurried with saturated brine and then transported to the storage yard through the transport pipe 24, eliminates the salt dust diffusion problem associated with truck transportation and prevents the overflow of high-salt wastewater during slurry transport. Furthermore, the storage process is easier to control, as the slurry can be centrally solidified after being transported to the storage yard, reducing the risk of leakage from open-air storage. Overall, this significantly reduces the ecological impact of tailings cleanup on the surrounding soil, groundwater, and air, meeting the stringent requirements for ecological protection of Qinghai Salt Lake.

[0071] Secondly, in terms of cost control, this embodiment achieves a shift from high consumption and high investment to energy saving and cost reduction, resulting in a significant decrease in overall operation and maintenance costs. The cost pressure of the excavation-loading-transportation process in related technologies mainly comes from two aspects: On the one hand, poor equipment adaptability leads to high wear and tear. Excavators, front-loading machines, and trucks are all general-purpose engineering equipment, and their buckets, shovel teeth, and truck bodies are made of ordinary carbon steel without salt-resistant anti-corrosion design. Long-term use in high-salt environments shortens the lifespan of truck bodies from 5-8 years under normal working conditions to 2-3 years, resulting in high equipment maintenance and replacement costs. On the other hand, high dependence on manual labor leads to a large proportion of labor costs. The entire process requires 3-4 people to operate collaboratively (excavator driver, front-loading machine driver, truck driver, and on-site coordinator), and labor costs account for 40%-50% of the overall operation and maintenance costs. This embodiment improves the continuous mining machine 111 to realize the mining and transportation functions of mining unit 1, achieving cost control: First, the specialized equipment has stronger durability. Both the belt conveyor 113 and the belt conveyor 21 are covered with neoprene rubber, and the blades of the mixer 22 are made of corrosion-resistant and wear-resistant steel. The service life of the equipment is increased by 2 to 3 times compared with traditional general equipment, and the maintenance and replacement costs are reduced by more than 30%. Second, the labor demand is greatly reduced. Through PLC linkage control, only 3 to 4 continuous mining machines 111 need to operate in parallel (compared to 8 to 10 people for the same scale in traditional processes), and the labor cost accounts for less than 20%. Third, the energy consumption is better. The energy consumption of slurry transportation is reduced by 25% compared with truck round-trip transportation, and there is no need to invest in the cost of leveling the storage site and seepage prevention treatment. Finally, the overall operation and maintenance cost is reduced by more than 30% compared with traditional processes, creating significant economic benefits for enterprises.

[0072] Finally, in terms of scenario adaptation, this embodiment achieves a transition from general-purpose to customized adaptation, demonstrating stronger adaptability to the high-salinity environment of salt lakes. Related technologies rely on general-purpose engineering equipment for the excavation-loading-transportation process, which is not designed for the specific environment of salt lake brine ponds. Excavators and trucks have high track / tire ground pressure (≥0.1MPa), making them prone to sinking into the soft salt layer (≤1.8m thick) of the brine pond, requiring additional roadbed paving and increasing operational complexity. Furthermore, the equipment materials lack salt-resistant anti-corrosion treatment, making them susceptible to component corrosion and mechanical failures under diurnal temperature variations of -30℃ to 40℃ and high salt spray conditions, affecting operational stability. In this embodiment, the continuous mining machine 111 uses wide tracks (550mm) and low ground pressure (≤0.07MPa), which can travel smoothly on soft salt layers without the need for roadbed paving. Both the belt conveyor 113 and the belt conveyor 21 are treated with anti-corrosion measures (such as anti-corrosion coating on the support frame), which can withstand extreme temperature differences and high salt environments, with an annual failure rate of less than 5%. At the same time, the downstream slurry conveying is not affected by severe weather. Even in the case of wind and sand or low temperature weather in the salt lake area, it can still achieve continuous operation around the clock. Compared with the traditional process, which has the problems of "high weather dependence, easy to get stuck in salt, and many failures", the scene adaptability and operational stability are greatly improved.

[0073] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cleaning system, characterized in that, include: A mining unit includes at least one mining device, which includes a continuous miner, an installation platform, and a belt conveyor. The installation platform is connected to the tail of the continuous miner to move synchronously under the drive of the continuous miner. The belt conveyor extends along a first direction and is installed on the installation platform. The belt conveyor is used to receive the tailings transported by the continuous miner and transport the tailings along the first direction, wherein the first direction is orthogonal to the mining direction of the continuous miner. A conveying unit is disposed on one side of the belt conveyor and below the belt conveyor in the first direction, and is used to receive and convey the tailings conveyed by the belt conveyor.

2. The cleaning system according to claim 1, characterized in that, The mining device comprises multiple mining devices arranged side by side in the first direction. The belt conveyor extends towards the conveying unit and is arranged at an upward inclination. The tail of the belt conveyor furthest from the conveying unit in two adjacent belt conveyors overlaps the head of the belt conveyor adjacent to the conveying unit.

3. The cleaning system according to claim 2, characterized in that, The overlap distance between two adjacent conveyor belts is 0.4m-0.6m.

4. The cleaning system according to claim 2, characterized in that, The continuous mining machine is a tracked continuous mining machine, and the mining section of the tracked continuous mining machine has multiple adjustable-pitch breaking teeth.

5. The cleaning system according to claim 1, characterized in that, The belt conveyor includes a support frame, a wear-resistant rubber belt, and a drive motor. The wear-resistant rubber belt is mounted on the support frame, and the drive motor is mounted on the support frame to drive the wear-resistant rubber belt to move. The support frame is a stainless steel support frame, and the drive motor is a corrosion-resistant motor.

6. The cleaning system according to claim 5, characterized in that, The surface of the wear-resistant rubber belt is provided with spaced protrusions.

7. The cleaning system according to claim 1, characterized in that, The conveying unit includes a belt conveyor, which is located on one side of the belt transfer conveyor in the first direction. The belt conveyor extends along the tunneling direction of the continuous mining machine and is used to receive and transport the tailings conveyed by the belt transfer conveyor.

8. The cleaning system according to claim 7, characterized in that, The conveying unit also includes a mixer, a conveying pump, and a conveying pipe. The mixer is used to receive and mix the conveying medium and the tailings conveyed by the belt conveyor to form a mixture. The conveying pump is located on the conveying pipe and connected to the mixer. The conveying pipe is used to convey the mixture.

9. The cleaning system according to claim 8, characterized in that, The conveying medium is saturated brine; and / or the concentration of the mixture is 60%-70%.

10. The cleaning system according to claim 1, characterized in that, The conveying unit is a truck, which is used to receive and transport the tailings conveyed by the belt conveyor.

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