Cleaning system

Abstract

The invention relates to the technical field of potash fertilizer, in particular to a cleaning system. The cleaning system comprises a digging unit and a conveying unit, the digging unit comprises at least one digging device, the digging device comprises a continuous mining machine, a mounting platform and a rubber belt transfer conveyor, and the mounting platform is connected with the tail of the continuous mining machine so as to be driven by the continuous mining machine to synchronously move; the rubber belt transfer conveyor extends in the first direction and is mounted on the mounting platform, the rubber belt transfer conveyor is used for receiving the tail salt excavated and conveyed by the continuous mining machine and conveying the tail salt in the first direction, and the first direction is orthogonal to the tunneling direction of the continuous mining machine; the conveying unit is arranged on one side of the rubber belt transfer conveyor in the first direction, located below the rubber belt transfer conveyor and used for receiving and conveying the tail salt conveyed by the rubber belt transfer conveyor. The cleaning system provided by the embodiment of the invention can improve the cleaning efficiency of the tail salt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of potassium fertilizer, in particular to a cleaning system. BACKGROUND

[0002] The main production process of potassium fertilizer production is to mine intercrystalline brine in salt lake stratum, transport to salt field to form carnallite by solar natural evaporation, and then use inorganic chemical process to extract potassium chloride to produce potassium fertilizer. In this process, although the commonly used cold crystallization-positive flotation process can effectively extract potassium chloride, a large amount of tail salt water will be produced, and the sodium chloride in the tail salt water will gradually deposit in the tail salt pool. The deposition of sodium chloride in the tail salt pool will reduce the effective volume of the brine pool, prolong the evaporation period, and seriously restrict the production efficiency of potassium fertilizer.

[0003] In related technologies, the tail salt dispersed at the bottom of the pool is usually excavated by an excavator and stored in a designated area on both sides of the salt pool ditch. A front loader enters the designated area to shovel and load the stored tail salt into a truck bed. The truck loaded with tail salt drives away from the salt pool and transports the tail salt to a designated storage point outside the field for unloading. However, the operation continuity between the excavator, front loader and truck in related technologies is poor, resulting in low efficiency of tail salt cleaning. SUMMARY

[0004] The present application aims to at least partially solve one of the technical problems in the related art. To this end, the embodiments of the present application propose a cleaning system that can improve the efficiency of tail salt cleaning.

[0005] The cleaning system of the embodiments of the present application comprises a mining unit, the mining unit comprising at least one mining device, the mining device comprising a continuous mining machine, a mounting platform and a belt transfer conveyor, the mounting platform being connected to the tail of the continuous mining machine to move synchronously under the driving of the continuous mining machine, the belt transfer conveyor extending along a first direction and being mounted on the mounting platform, the belt transfer conveyor being used to receive the tail salt mined and conveyed by the continuous mining machine and convey the tail salt along the first direction, wherein the first direction is orthogonal to the advancing direction of the continuous mining machine; a conveying unit, the conveying unit being located on one side of the belt transfer conveyor and below the belt transfer conveyor in the first direction, and being used to receive and convey the tail salt conveyed by the belt transfer conveyor.

[0006] The cleaning system of the embodiments of the present application continuously mines the tail salt in the salt pool through the autonomous travel of the continuous mining machine of the mining unit, continuously conveys the mined tail salt to the belt transfer conveyor, conveys the tail salt to the conveying unit through the belt transfer conveyor, and then conveys the tail salt to the storage location through the conveying unit, realizing the continuous conveying between the tail salt in the salt pool and the storage location, which is beneficial to improving the cleaning efficiency of the tail salt in the salt pool.

[0007] In some embodiments, the mining devices are multiple, the multiple mining devices are arranged side by side in the first direction, the belt conveying conveyors are arranged extending in a direction towards the conveying unit and inclined upward, and the tail of a belt conveying conveyor away from the conveying unit among two adjacent belt conveying conveyors is overlapped with the head of a belt conveying conveyor adjacent to the conveying unit.

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

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

[0010] In some embodiments, the belt conveying conveyor comprises a support, a wear-resistant rubber belt and a driving motor, the wear-resistant rubber belt is installed on the support, the driving motor is installed on the support for driving the wear-resistant rubber belt to move, the support is a stainless steel support, and the driving motor is a corrosion-resistant motor.

[0011] In some embodiments, the surface of the wear-resistant rubber belt is provided with protrusions arranged at intervals.

[0012] In some embodiments, the conveying unit comprises a belt conveyor, the belt conveyor is arranged on one side of the belt conveying conveyor in the first direction, the belt conveyor extends in the tunneling direction of the continuous mining machine, and the belt conveyor is used for receiving and conveying the tail salt conveyed by the belt conveying conveyor.

[0013] In some embodiments, the conveying unit further comprises a mixer, a conveying pump and a conveying pipe, the mixer is used for receiving and mixing a conveying medium and the tail salt conveyed by the belt conveyor to form a mixture, the conveying pump is arranged on the conveying pipe and connected with the mixer, and the conveying pipe is used for conveying 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, and the truck is used for receiving and conveying the tail salt conveyed by the belt conveying conveyor. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of a cleaning system according to an embodiment of the present application.

[0017] Figure 2 is a partial schematic view of a cleaning system according to an embodiment of the present application.

[0018] Figure 3 is a schematic view of a mining device of a cleaning system according to an embodiment of the present application.

[0019] Figure 4 is a schematic view of a belt transfer conveyor of a cleaning system according to an embodiment of the present application.

[0020] Figure 5 is a schematic view of a cleaning system according to another embodiment of the present application.

[0021] Reference Signs: mining unit 1, mining device 11, continuous miner 111, mining part 1111, salt scooping part 1112, material guiding part 1113, mounting platform 112, belt transfer conveyor 113, bracket 1131, wear-resistant rubber belt 1132, conveying unit 2, belt conveyor 21, mixer 22, conveying pump 23, conveying pipe 24, truck 25. DETAILED DESCRIPTION

[0022] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0023] The embodiments of the present application are described below in detail with reference to the accompanying drawings. Figures 1-5 A cleaning system according to an embodiment of the present application is described in detail below.

[0024] The cleaning system according to an embodiment of the present application comprises a mining unit 1 and a conveying unit 2. The mining unit 1 comprises at least one mining device 11, and the mining device 11 comprises a continuous miner 111, a mounting platform 112 and a belt transfer conveyor 113. The mounting platform 112 is connected to the tail of the continuous miner 111 to move synchronously under the driving of the continuous miner 111. The belt transfer conveyor 113 extends along a first direction and is mounted on the mounting platform 112. The belt transfer conveyor 113 is used to receive tail salt conveyed by the continuous miner and to convey the tail salt along the first direction, wherein the first direction is orthogonal to the advancing direction of the continuous miner 111. The conveying unit 2 is arranged on one side of the belt transfer conveyor 113 and below the belt transfer conveyor 113 in the first direction, and is used to receive and convey the tail salt conveyed by the belt transfer conveyor 113.

[0025] The cleaning system of the embodiment of the present application realizes continuous mining of tail salt in the salt pond through autonomous travel of the continuous miner 111 of the mining unit 1, continuously transports the mined tail salt to the belt transfer conveyor 113, transports the tail salt to the conveying unit 2 through the belt transfer conveyor 113, and then transports the tail salt to the storage location through the conveying unit 2, thereby realizing continuous transportation between the tail salt in the salt pond and the storage location, and facilitating improvement of the cleaning efficiency of the tail salt in the salt pond.

[0026] Specifically, as shown in Figures 1-3 the tail of the continuous miner 111, so that the mounting platform 112 moves synchronously with the continuous miner 111 during the mining process of the continuous miner 111. By mounting the belt transfer conveyor 113 on the mounting platform 112, the tail salt mined by the continuous miner 111 can be continuously transported to the belt transfer conveyor 113, and then transported to the conveying unit 2 through the belt transfer conveyor 113, thereby realizing uninterrupted transfer of the tail salt.

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

[0028] For ease of description, in this embodiment, the mining direction of the continuous miner 111 is consistent with the front-rear direction, and the first direction is consistent with the left-right direction. The continuous miner 111 mines the tail salt in the direction from back to front, the mined tail salt is transported to the tail of the continuous miner 111 and then transferred to the belt transfer conveyor 113, the conveying unit 2 is arranged on the right side of the belt transfer conveyor 113, the belt transfer conveyor 113 transports the received tail salt to the conveying unit 2 in the direction from left to right, and the conveying unit 2 transports the tail salt to the storage location.

[0029] Optionally, the mining device 11 can be one or multiple. When the mining device 11 is one, the mining device 11 is arranged in the salt pond, the continuous miner 111 mines the tail salt and transports it to the belt transfer conveyor 113; when the mining device 11 is multiple, multiple mining devices 11 are arranged side by side in the first direction, multiple continuous miners 111 simultaneously mine the tail salt in the salt pond and transport the mined tail salt to the corresponding belt transfer conveyor 113 of the continuous miner 111, and then transport the tail salt to the conveying unit 2 through the belt transfer conveyor 113. The number of mining devices 11 can be determined according to the width of the salt pond to be cleaned. When the width of the salt pond is narrow, only one mining device 11 can be arranged; when the width of the salt pond is wide, multiple mining devices 11 can be arranged side by side to increase the mining width of the mining unit 1, thereby facilitating improvement of the mining efficiency.

[0030] Optionally, the continuous mining machine 111 comprises a mining unit 1111, a salt scooping unit 1112 and a material guiding unit 1113, the mining unit 1111 is configured to mine tail salt in the salt pool, the salt scooping unit 1112 is configured to collect the tail salt mined by the mining unit 1111 to the material guiding unit 1113, and the material guiding unit 1113 is configured to deliver the tail salt to the tail of the continuous mining machine 111, and the belt transfer conveyor 113 is configured to receive the tail salt delivered by the material guiding unit 1113 of the continuous mining machine 111 and deliver the tail salt to the conveying unit 2.

[0031] In some embodiments, a plurality of mining devices 11 are arranged side by side in the first direction, and the belt transfer conveyors 113 are arranged extending in the direction towards the conveying unit 2 and inclined upwardly, and the tail of the belt transfer conveyor 113 of the two adjacent belt transfer conveyors 113 away from the conveying unit 2 is overlapped with the head of the belt transfer conveyor 113 adjacent to the conveying unit 2.

[0032] Specifically, as shown in Figures 1-4 each of the mining devices 11 comprises one continuous mining machine 111, one installation platform 112 and one belt transfer conveyor 113, the two adjacent continuous mining machines 111 are arranged side by side in the left-right direction, the two adjacent installation platforms 112 are arranged side by side in the left-right direction, the two adjacent belt transfer conveyors 113 are arranged side by side in the left-right direction, the belt transfer conveyors 113 are arranged extending in the direction towards the conveying unit 2 and inclined upwardly, the belt transfer conveyor 113 on the left side of the two adjacent belt transfer conveyors 113 is farther away from the conveying unit 2 than the belt transfer conveyor 113 on the right side, the tail of the belt transfer conveyor 113 on the left side is overlapped with the head of the belt transfer conveyor 113 on the right side, and the tail of the belt transfer conveyor 113 on the right side is overlapped with the head of the belt transfer conveyor 113 on the right side thereof or above the conveying unit 2.

[0033] The tail salt conveyed on the belt transfer conveyor 113 away from the conveying unit 2 can be conveyed to the belt transfer conveyor 113 adjacent to the conveying unit 2 by overlapping the tail of the belt transfer conveyor 113 away from the conveying unit 2 with the head of the belt transfer conveyor 113 adjacent to the conveying unit 2 in the two adjacent belt transfer conveyors 113, so that the tail salt is conveyed between the two adjacent belt transfer conveyors 113, and the tail salt on the plurality of belt transfer conveyors 113 is conveyed to the conveying unit 2, thereby improving the conveying convenience.

[0034] It can be understood that the lap refers to the tail of one of the two adjacent belt transfer conveyors 113 being located above the head of the other belt transfer conveyor 113 and there being an overlapping portion between the two belt transfer conveyors 113, so as to ensure that the tail salt conveyed on one belt transfer conveyor 113 can be conveyed onto the other belt transfer conveyor 113.

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

[0036] In some embodiments, as shown in Figure 4 The lap distance between the two adjacent belt transfer conveyors is 0.4m-0.6m. By limiting the lap distance between the two adjacent belt transfer conveyors 113, the embodiment avoids the tail salt from spilling between the two adjacent belt transfer conveyors 113, improves the stability and continuity of the tail salt conveying process, realizes the large-section mining of the brine pool in one push, greatly improves the tail salt transfer amount per unit time, and further improves the cleaning efficiency.

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

[0038] In some embodiments, the continuous miner 111 is a track-type continuous miner 111, and the mining part 1111 of the track-type continuous miner 111 has a plurality of adjustable pitch crushing teeth.

[0039] Specifically, the wide width of the track is set to 550mm, the ground pressure is less than or equal to 0.07MPa, and the thickness of the deposited layer is less than or equal to 1.8m, so that the track-type continuous miner 111 can travel smoothly on the sodium chloride deposited layer of the brine pool, avoiding the track from sinking into the salt.

[0040] Optionally, the pitch of the crushing teeth is 150mm-200mm. By setting the adjustable pitch crushing teeth, the mining part 1111 of the continuous miner 111 can not only crush the sodium chloride block layer with a hardness less than or equal to 6MPa, but also efficiently mine loose granular salt, and the mining efficiency is improved by 40% compared with the traditional excavator. The continuous miner 111 has higher adaptability and higher mining efficiency.

[0041] It can be understood that the continuous miner 111 can also adopt a non-track type structure.

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

[0043] Specifically, the mounting bracket 1131 is a flatbed trailer, and the trailer is connected with the continuous mining machine 111 through a rigid connecting piece, to ensure synchronization and stability during travel and adapt to soft salt layers in the brine pool. A 5m-long rubber belt transfer conveyor 113 is mounted on the flatbed trailer. The rubber belt transfer conveyor 113 adopts a wear-resistant rubber belt 1132 and a stainless steel support 1131, and the driving motor adopts an explosion-proof and corrosion-resistant design, which can withstand the high-salt mist environment of the salt lake and has a service life more than 3 times longer than that of a conventional general rubber belt transfer conveyor 113.

[0044] In some embodiments, the surface of the wear-resistant rubber belt 1132 is provided with protrusions arranged at intervals.

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

[0046] The embodiment forms a mining tail rubber belt transfer integrated structure by rigidly connecting a flatbed trailer to the tail of the crawler-type continuous mining machine 111 and integrating a 5m-long explosion-proof and corrosion-resistant rubber belt transfer conveyor 113 on the flatbed trailer. The traditional continuous mining machine 111 can only mine and needs to rely on external equipment for transfer, and the embodiment can break through this limitation, realize tail salt mining and transfer at the same time, and ensure stable travel of the equipment on the soft salt layer in the brine pool through the design of wide crawler belts and low ground pressure, thereby solving the problem of easy sinking of the traditional excavator in salt.

[0047] Through the arrangement of the rubber belt transfer conveyor 113 at the tail of the continuous mining machine 111 and the cooperative structure of the rubber belt conveyor 21, 2-5 crawler-type continuous mining machines 111 can be supported for parallel operation. The discharge end of the rubber belt transfer conveyor 113 at the tail of a single continuous mining machine 111 can be connected with the feeding end of the rubber belt transfer conveyor 113 at the tail of an adjacent continuous mining machine 111, to realize the synchronous confluence of tail salt mined by multiple continuous mining machines 111 to the rubber belt conveyor 21, form a transfer pattern of concentration of multiple machines to one belt, break through the bottleneck of single-machine operation and non-collaboration of equipment in the traditional process, realize one-time advancing mining of the brine pool with a large section, and realize the integration of mining and conveying, thereby improving the tail salt cleaning efficiency.

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

[0049] Specifically, as shown in FIG. 1, the rubber belt conveyor 21 is arranged on one side of the rubber belt transfer conveyor 113 in the first direction, and the rubber belt conveyor 21 extends along the advancing direction of the continuous mining machine 111. Figure 2As shown, the belt conveyor 21 is arranged at the right side of the belt transfer conveyor 113, and is used to receive the tail salt conveyed by the belt transfer conveyor 113. The belt conveyor 21 is used to convey the tail salt in a rear-to-front direction to convey the tail salt to a storage location.

[0050] The belt of the belt conveyor 21 is made of polyester canvas skeleton and neoprene rubber cover, so that the surface of the belt of the belt conveyor 21 is resistant to salt corrosion and wear. The support of the belt conveyor 21 is made of Q235 carbon steel with anti-corrosion coating treatment. The bottom of the support is provided with adjustable support legs (adjustable height of 0.3 m to 0.8 m). The height of the belt conveyor 21 can be adjusted according to the terrain of the brine pool edge to ensure the stable conveying of the tail salt and avoid the loss of tail salt due to spilling.

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

[0052] In some embodiments, the conveying unit 2 further comprises 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 tail salt conveyed by the belt conveyor 21 to form a mixture. The conveying pump 23 is arranged on the conveying pipe 24 and connected to the mixer 22. The conveying pipe 24 is used to convey the mixture.

[0053] Specifically, as shown in Figure 2 The mixer 22 is a vertical high-efficiency mixer. The volume of the mixer 22 is 5 cubic meters. Double-layer spiral stirring blades are arranged on the stirring shaft of the mixer 22. The material of the stirring blades is NM450 wear-resistant steel. The rapid mixing of the tail salt and the conveying medium can be realized. The stirring speed is greater than or equal to 600 r / min. The stirring time is less than or equal to 3 minutes, and a uniform mixture can be formed. The caking of the tail salt in the stirring cylinder is avoided.

[0054] The feeding port of the mixer 22 is connected to the discharging end of the belt conveyor 21 to receive the tail salt conveyed by the belt conveyor 21. The mixer 22 is in communication with the conveying medium to receive the conveying medium. The conveying medium and the tail salt are mixed uniformly in the mixer 22 to form a mixture. The conveying of the tail salt is realized 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 5 km, a slurry pump is used. The conveying flow of the slurry pump is greater than or equal to 200 cubic meters / hour, and the lift is greater than or equal to 50 m. The slurry pump is suitable for short-distance conveying. When the conveying distance is greater than 5 km, a plunger pump is used. The pressure of the plunger pump is greater than or equal to 10 MPa, and the flow is greater than or equal to 150 cubic meters / hour. The plunger pump can be suitable for long-distance conveying.

[0056] The conveying pipe 24 is made of ultra-high molecular weight polyethylene (UHMWPE), which is resistant to salt corrosion and abrasion, and has a service life of 8-10 years, avoiding the frequent replacement of traditional truck beds due to corrosion.

[0057] Alternatively, the conveying unit 2 can also only include the belt conveyor 21, and the tail salt is directly conveyed to the storage site by the belt conveyor 21, but considering the high cost of the belt conveyor 21, the present embodiment conveys the tail salt by mixing the conveying medium with the tail salt to form a mixture, which can realize continuous conveying of the tail salt and has high conveying efficiency.

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

[0059] In the present embodiment, the conveying medium is set as saturated brine, which can directly use the saturated brine in the production process of salt lake potash, without the need to additionally introduce clean water, avoiding the destruction of the composition balance of the salt lake brine, and the tail salt is insoluble in the saturated brine, and the saturated brine only plays a role in conveying the tail salt, and after the tail salt is conveyed to the storage site, the protective brine is backflowed, realizing the repeated circulation of the protective brine.

[0060] In the present embodiment, the belt conveyor 21 is connected to the agitator 22 at the discharge end, the saturated brine in the salt lake production is used as the pulping medium, without the need to additionally add water, the tail salt and the saturated brine are quickly mixed by the double-layer spiral stirring blades to form a uniform slurry with a concentration of 60%-70%, and then the slurry is conveyed to the stockyard by the conveying pump 23 adapted to the conveying distance, which can break through the limitation of traditional truck solid transportation, realize continuous conveying of the tail salt slurry, and avoid salt dust diffusion and transportation loss.

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

[0062] In the present embodiment, the concentration of the mixture of the saturated brine and the tail salt is limited to ensure that the tail salt and the saturated brine are fully mixed to form a tail salt slurry with uniform concentration, and further ensure the fluidity and conveying stability of the slurry. Moreover, the slurry is directly conveyed to the off-site tail salt stockyard by the slurry pump or the plunger pump, without the need for frequent loading and unloading and back and forth like traditional truck transportation, which not only avoids salt dust diffusion and loss in solid tail salt transportation, but also greatly shortens the conveying period of the tail salt from the brine pool to the stockyard, and the slurry conveying can realize all-weather continuous operation, which is not affected by the large diurnal temperature difference and bad weather in the salt lake area, further ensuring the continuity of the cleaning operation.

[0063] The belt conveyor 21 of the embodiment conveys the tail salt into the mixer 22, while saturated brine produced in the salt lake is injected into the mixer 22 at the same time, the mass ratio of the saturated brine to the tail salt is 1:1.5-1:2.23, the mixer 22 is started, and stirring is performed by double-layer spiral stirring blades, the stirring speed of the stirring blades is 550-650 r / min, the stirring time is 2-4 min, a tail salt slurry with a concentration of 60%-70% is formed, and then the tail salt slurry is conveyed to a tail salt storage yard by using a slurry pump or a plunger pump according to the conveying distance. The stirring cylinder of the mixer 22 is made of NM450 wear-resistant steel. By using saturated brine as the conveying medium, waste of water resources and imbalance of the composition of the salt lake brine can be avoided, and the slurry parameters (concentration and stirring speed) and the pump type can be specifically set according to the characteristics of the tail salt, so that better conveying efficiency can be achieved.

[0064] In the embodiment, the continuous mining machine 111 is arranged in parallel above the sodium chloride deposition layer of the brine pool, the sodium chloride deposition layer is mined in situ, the tail salt is transferred from the mining point to the conveying point without interruption by using the tail belt transfer conveyor 113 at the tail of the continuous mining machine 111 and the belt conveyor 21, the belt conveyor 21 is connected with the mixer 22, the outlet of the mixer 22 is connected with the inlet of the conveying pump 23, the outlet of the conveying pump 23 is connected with the conveying pipe 24, the slurry is conveyed to the tail salt storage yard through the conveying pipe 24, and the tail salt is converted into a slurry and then conveyed to the storage yard efficiently, so that a tail salt cleaning mode of “synchronous mining and conveying, multi-machine cooperation and large-scale operation” is formed, and the cleaning mode is adapted to the large-section cleaning requirement of the brine pool and the high-salt operation environment of the salt lake. The whole cleaning and conveying process can be controlled by the PLC controller in linkage with the mining speed of the continuous mining machine 111, the speed of the belt conveyor 21, the speed of the mixer 22 and the conveying amount of the conveying pump 23, so that the tail salt can be continuously conveyed, and the tail salt cleaning efficiency is high, the cost is low and the environmental protection performance is good.

[0065] The cleaning system of the embodiment breaks the limitation of discrete step-by-step operation by integrating the mining and conveying of the tail salt, reduces the equipment downtime and waiting time, improves the comprehensive utilization rate of the equipment, and thus meets the continuous operation requirement of large-scale tail salt cleaning, solves the problem that the accumulation of the tail salt restricts the production of potash fertilizer, and improves the operation efficiency and continuity. By reducing the generation of salt dust and the leakage of high-salt wastewater, the pollution of the surrounding ecological environment caused by the tail salt cleaning process is reduced, the requirement of green development of the salt lake resources is met, and the environmental protection performance is enhanced. By replacing the general equipment with special equipment that is resistant to corrosion and wear, the service life of the equipment is prolonged, the frequency of maintenance and replacement is reduced, the manual operation process is optimized, the dependence on manpower is reduced, and finally the cost is effectively controlled, and the comprehensive operation and maintenance cost is reduced.

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

[0067] Specifically, as shown inFigure 5 As shown, when the width of the salt pool or the brine conveying channel is not very large (for example, 5m-10m), one or two mining devices 11 can be used for parallel mining, and the width of the salt pool or the brine conveying channel can be mined at one time. Since the width of the salt pool or the brine conveying channel is not very wide, the tail salt mined at one time will not be too much, and the tail salt mined does not need to be transported by the belt conveyor 21 and the mixer 22. The tail salt transported by the tail belt transfer conveyor 113 at the tail of the continuous miner 111 can be directly transported to the external truck 25 for transportation, which can reduce the cleaning cost and meet the transportation efficiency.

[0068] The cleaning system of the embodiment can realize continuous operation, integrated cooperation and large-scale efficient cleaning operation when cleaning sodium chloride in the salt lake brine pool. Compared with the "dig-loading-transportation" step-by-step operation process in the related art, the embodiment has obvious advantages in operation efficiency, environmental performance, cost control and scene adaptation, and can improve the cleaning efficiency.

[0069] Firstly, in terms of cleaning efficiency, the embodiment is from discrete waiting to continuous high efficiency, and the large-scale cleaning capacity is greatly improved. The "excavator excavates salt and stores, front loader loads salt, and truck transports and stores" discrete logic in the related art, each link relies on manual connection, and there is a serious problem of downtime waiting. The front loader can only load salt after the excavator completes the specified area storage. The front loader needs to wait for the truck to rotate when loading salt. If the transportation distance is more than 1km, the front loader will be idle due to the prolonged return time of the truck. The final comprehensive efficiency of the equipment is less than 65%. Even the single-day cleaning capacity of a 20t excavator is only ≤300 cubic meters, which is difficult to meet the cleaning demand of large-scale deposition of sodium chloride in the brine pool. The embodiment breaks through the limitation of discrete operation through the cooperation of the mining unit 1, the belt conveyor 21 and the mixer 22. On the one hand, the continuous miner 111 and the belt transfer conveyor 113 at the tail of the continuous miner 111 make the mining unit 1 have the functions of mining and tail belt transfer. The tail salt mined can be directly transferred to the belt conveyor 21 without intermediate storage, eliminating the intermediate link and reducing the loss rate to below 5%, thereby reducing resource waste. On the other hand, multiple continuous miners 111 can realize parallel operation through the tail belt lapping, and the tail salt is synchronously converged to the belt conveyor 21, and then continuously transported to the stockyard through the slurry pump 23 and the conveying pipe 24 after being slurried by the mixer 22. The whole process is uninterrupted and has no intermediate storage. According to statistics, in actual application, the single-day cleaning capacity of a 20t excavator is 1500m 3 ~3000m 3 , and the daily processing capacity of a single continuous miner 111 is about 8000m 3 ~10000m 3(assuming 3m wide, 1.5m deep excavation per time, 2000m daily excavation), when 2-4 continuous mining machines 111 operate in parallel, the comprehensive efficiency of the equipment is improved by 20 times, and large-section excavation of the brine pool can be realized at one time, the evaporation operation capacity of the brine pool is quickly recovered, and the core problem of tail salt deposition restricting potash production is effectively solved.

[0070] Secondly, in terms of environmental performance, the embodiment realizes the transition from secondary pollution to green and clean, and greatly reduces the impact on the ecology. The environmental protection short board of the digging-loading-transportation process in the related art is prominent, a large amount of salt dust is generated when the front loader loads the tail salt, the salt dust diffuses with the bumping during the truck transportation process, causing the surrounding air environment to be polluted; if the anti-seepage measures at the transportation link are not in place, high-salt wastewater is easy to seep into the soil and underground water, causing soil salinization and underground water pollution, which is contrary to the concept of green development of salt lake resources. By slurrying the tail salt and then transporting it over a long distance, the sealing of the conveying pipe 24 can reduce the generation of salt dust, and the salt dust emission concentration is much lower than that in the related art; moreover, by using slurry transportation, the tail salt is slurried by saturated brine and then transported to the storage yard through the conveying pipe 24, there is no salt dust diffusion problem caused by truck transportation, and there is no high-salt wastewater overflow during slurry transportation; and the storage link is easier to control, after the slurry is transported to the storage yard, it can be treated by solidification, reducing the leakage risk of open storage, greatly reducing the ecological impact of tail salt cleaning on the surrounding soil, underground water and air, and meeting the strict requirements of Qinghai Salt Lake ecological protection.

[0071] Again, in terms of cost control, the embodiment realizes energy saving and cost reduction from high consumption and high investment, and the comprehensive operation and maintenance cost is significantly reduced. The cost pressure of the digging-loading-transporting process in the related art mainly comes from two aspects: on the one hand, poor equipment adaptability leads to high loss, the excavator, the front loader and the truck are general engineering equipment, the bucket, the bucket tooth and the truck compartment are ordinary carbon steel materials, without salt-resistant and corrosion-resistant design, the truck compartment service life is shortened from 5-8 years under normal working conditions to 2-3 years, and the equipment maintenance and replacement cost is high; on the other hand, high dependence on manual work leads to high proportion of labor cost, the whole process needs 3-4 people to operate cooperatively (excavator driver, front loader driver, truck driver and on-site coordinator), and the labor cost accounts for 40%-50% of the comprehensive operation and maintenance cost. The embodiment realizes the mining and transporting functions of the mining unit 1 by improving the continuous mining machine 111, and realizes controllable cost: first, the special equipment has stronger wear resistance, the belt transporting 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 2-3 times higher than that of the traditional general equipment, and the maintenance and replacement cost is reduced by more than 30%; second, the labor demand is greatly reduced, through PLC linkage control, 2-4 continuous mining machines 111 operate in parallel, only 3-4 people are needed (8-10 people are needed for the traditional process of the same scale), and the labor cost accounts for less than 20%; third, the energy consumption is more optimal, the slurry conveying is 25% lower in energy consumption than the truck round-trip transportation, and there is no need for additional investment in site leveling, anti-seepage treatment and other costs, and finally the comprehensive operation and maintenance cost is reduced by more than 30% compared with the traditional process, creating significant economic benefits for enterprises.

[0072] Finally, in terms of scene adaptation, the embodiment realizes customized adaptation from general to customized adaptation, and has stronger adaptability to the high-salt environment of salt lake. The general engineering equipment relied on by the digging-loading-transporting process in the related art is not designed for the special environment of salt lake brine pool, the track / tire ground contact pressure of the excavator and the truck is higher (≥0.1 MPa), and it is easy to sink in the soft salt layer (thickness ≤1.8 m) of the brine pool, which needs to be paved with a roadbed, increasing the operation complexity; and the equipment material has no salt-resistant and corrosion-resistant treatment, in the day and night temperature difference of-30℃-40℃ and high salt mist environment, parts are easy to rust and mechanical failure, affecting the operation stability. The continuous mining machine 111 of the embodiment adopts a wide track (550 mm) and a low ground contact pressure (≤0.07 MPa), which can travel smoothly on the soft salt layer without the need for paving a roadbed, the belt transporting conveyor 113 and the belt conveyor 21 are both corrosion-resistant (such as the support coated with a corrosion-resistant coating), which can withstand extreme temperature difference and high salt environment, and the annual operation failure rate is less than 5%; at the same time, the slurry conveying at the rear end is not affected by bad weather, even in the wind and sand and low temperature weather of the salt lake area, it can still realize all-weather continuous operation, compared with the problems of the traditional process “high weather dependence, easy to sink in salt, and many failures”, the scene adaptability and operation stability are greatly improved.

[0073] In the description of the present application, it is to be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0074] In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated thereby. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0075] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0077] In this disclosure, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one embodiment or example of the present disclosure. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referred to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the terminology "comprising" is used in the disclosure as comprising but not limited to, that is, it is open-ended and does not exclude the presence of additional features, structures, materials, or characteristics.

[0078] Although the embodiments of the present disclosure have been shown and described above, it is understood that the above-described embodiments are exemplary, and are not to be interpreted as limiting the present disclosure, and the ordinary skilled in the art can make changes, modifications, replacements, and variations to the above-described embodiments within the scope of the present disclosure.

Claims

1. A cleaning system, characterized by, The mining unit comprises at least one mining device, the mining device comprises a continuous miner, a mounting platform connected with the tail of the continuous miner to move synchronously under the driving of the continuous miner, and a belt transfer conveyor extending in a first direction and mounted on the mounting platform, the belt transfer conveyor being used to receive tail salt mined and conveyed by the continuous miner and to convey the tail salt in the first direction, wherein the first direction is orthogonal to the advancing direction of the continuous miner. The conveying unit is arranged on one side of the belt transfer conveyor in the first direction and below the belt transfer conveyor, and is used to receive and convey the tail salt conveyed by the belt transfer conveyor. The mining device is a plurality of mining devices, the plurality of mining devices are arranged side by side in the first direction, the belt transfer conveyor extends in a direction towards the conveying unit and is arranged to be inclined upward, and the tail of the belt transfer conveyor away from the conveying unit in the two adjacent belt transfer conveyors is overlapped with the head of the belt transfer conveyor adjacent to the conveying unit.

2. The cleaning system of claim 1, wherein, The overlapping distance between the two adjacent belt transfer conveyors is 0.4-0.6 m.

3. The cleaning system of claim 2, wherein, The continuous miner is a crawler-type continuous miner, and the mining part of the crawler-type continuous miner has a plurality of adjustable pitch crushing teeth.

4. The cleaning system of claim 2, wherein, The belt transfer conveyor comprises a support, a wear-resistant rubber belt and a driving motor, the wear-resistant rubber belt is mounted on the support, and the driving motor is mounted on the support to drive the movement of the wear-resistant rubber belt, the support is a stainless steel support, and the driving motor is a corrosion-resistant motor.

5. The cleaning system of claim 1, wherein, The surface of the wear-resistant rubber belt is provided with protrusions arranged at intervals.

6. The cleaning system of claim 5, wherein, The conveying unit comprises a belt conveyor arranged on one side of the belt transfer conveyor in the first direction, the belt conveyor extends in the advancing direction of the continuous miner, and the belt conveyor is used to receive and convey the tail salt conveyed by the belt transfer conveyor.

7. The cleaning system of claim 1, wherein, The conveying unit further comprises a mixer, a conveying pump and a conveying pipe, the mixer is used to receive and mix a conveying medium and the tail salt conveyed by the belt conveyor to form a mixture, the conveying pump is arranged on the conveying pipe and connected with the mixer, and the conveying pipe is used to convey the mixture.

8. The cleaning system of claim 7, wherein, The conveying medium is saturated brine; and / or, the concentration of the mixture is 60%-70%.

9. The cleaning system of claim 8, wherein, The conveying unit is a truck, and the truck is used to receive and convey the tail salt conveyed by the belt transfer conveyor.

10. The cleaning system of claim 1, wherein, ​

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