A kind of mineral solid waste-based synthetic soil preparation device and its utilization method

Abstract

The present application is suitable for the technical field of recycling treatment equipment, and provides a mine-source solid waste-based synthetic soil preparation device and a utilization method thereof. The device comprises a crushing and screening unit for sequentially crushing, grinding and screening mine-source solid waste raw materials to obtain mine-source solid waste powder with qualified particle size; a batching and mixing unit connected with the output end of the crushing and screening unit; a fermentation unit connected with the output end of the batching and mixing unit; a tail gas treatment device with an input end connected with the exhaust ports of the crushing and screening unit and the fermentation unit for dust removal and deodorization treatment of dust-containing gas and odor gas during operation; a granulation and drying unit connected with the output end of the tail gas treatment device for granulating and drying the fermented material to a preset water content, and obtaining synthetic soil finished products after cooling and screening; and a control system electrically connected with the crushing and screening unit, the batching and mixing unit, the fermentation unit, the tail gas treatment device and the granulation and drying unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of recycling treatment equipment, and particularly relates to a mine-source solid waste-based synthetic soil preparation device and a utilization method thereof. BACKGROUND

[0002] Mine-source solid waste (mainly including coal gangue, tailings, gasification slag, red mud, etc.) is a large amount of industrial solid waste generated in the process of mining and processing of mineral resources. Taking coal gangue as an example, the historical cumulative stockpile in China has exceeded 7 billion tons, and the annual new discharge is about 800 million tons. Long-term open-air storage not only occupies a large amount of land resources, but also releases toxic and harmful gases such as sulfur dioxide and nitrogen oxides due to spontaneous combustion, and the acid wastewater generated by rainwater leaching also causes persistent pollution to the surrounding soil and water, which has become a prominent obstacle to the improvement of the ecological environment of the mining area and the green development of resources. At the same time, the demand for high-quality soil resources in the fields of mine ecological restoration, desertification control, and saline-alkali land improvement is increasingly urgent, and the use of mine-source solid waste to prepare synthetic soil to realize “waste control and waste into treasure” has become an important technical direction for the resource utilization of large amounts of solid waste.

[0003] In the preparation of synthetic soil from mine-source solid waste, it is usually necessary to go through multiple processes such as crushing and screening, ingredient mixing, fermentation and aging, and granulation and drying. However, the existing mine-source solid waste hydrothermal treatment equipment and synthetic soil preparation devices have discontinuous processes and low automation levels in actual application. In the prior art, crushing and screening, ingredient mixing, fermentation and aging, and granulation and drying processes often use independent single equipment or semi-automatic production lines, and there is a lack of effective closed connection and collaborative control between processes. After the solid material completes a process, it needs to be transferred to the next process by manual operation or auxiliary conveying equipment. Cross-process transfer not only significantly increases the material transfer link and prolongs the production cycle, but also easily causes material leakage and dust pollution. In order to solve the technical problem, a mine-source solid waste-based synthetic soil preparation device and a utilization method thereof are proposed. SUMMARY

[0004] The purpose of the present application is to provide a mine-source solid waste-based synthetic soil preparation device and a utilization method thereof to solve the problems raised in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A mine-source solid waste-based synthetic soil preparation device, comprising a crushing and screening unit for crushing, grinding and screening mine-source solid waste raw materials in sequence to obtain mine-source solid waste powder with qualified particle size;

[0007] The ingredient mixing unit is connected with the output end of the crushing and screening unit, and is used for mixing the mineral source solid waste powder with the organic modifier, the binder and the microbial agent according to a preset proportion to form a mixture; the ingredient mixing unit comprises a stirring component arranged in the interior thereof, and the stirring component comprises a stirring shaft and a plurality of stirring assemblies arranged on the stirring shaft and capable of automatically adjusting a stirring range and a stirring angle according to a stirring viscosity.

[0008] The fermentation unit is connected with the output end of the ingredient mixing unit, and is used for fermenting and aging the mixture under a set temperature, humidity and oxygen concentration condition.

[0009] The tail gas treatment device is connected with the exhaust outlets of the crushing and screening unit and the fermentation unit, and is used for dust removal and deodorization treatment of dust-containing gas and odor gas in the operation process.

[0010] The granulation and drying unit is connected with the output end of the tail gas treatment device, and is used for granulating and drying the fermented material to a preset water content, and obtaining a synthetic soil product after cooling and screening.

[0011] The control system is electrically connected with the crushing and screening unit, the ingredient mixing unit, the fermentation unit, the tail gas treatment device and the granulation and drying unit, and automatically controls the coordinated operation of the units according to preset process parameters.

[0012] Further, the crushing and screening unit comprises a feeding hopper, a multi-stage crushing device, a vibrating screening machine and a return conveying belt.

[0013] Further, the tail gas treatment device comprises a cyclone dust collector and a biological deodorization tower, and the air inlet of the cyclone dust collector is communicated with the exhaust outlets of the crushing and screening unit and the fermentation unit, and the air outlet of the cyclone dust collector is communicated with the air inlet of the biological deodorization tower.

[0014] Further, the ingredient mixing unit is provided with a raw material bin, and the raw material bin is arranged to add the organic modifier, the binder and the microbial agent into the interior of the ingredient mixing unit.

[0015] Further, the stirring assembly comprises a mounting sleeve, a stirring blade and a mounting shaft fixedly mounted on the stirring shaft, the stirring blade is fixedly mounted on the mounting sleeve, the mounting sleeve is provided with a mounting circular groove on one end close to the mounting shaft, the mounting shaft is rotatably sleeved in the mounting sleeve, the mounting sleeve is sleeved on the mounting shaft and elastically slides along the axial direction of the mounting shaft, the mounting sleeve is elastically connected to the mounting sleeve, a plurality of guide grooves are arranged on the outer side of the mounting shaft, and a guide rod is slidably arranged in each guide groove, and the guide rod is fixedly mounted on the side wall of the mounting circular groove; and the guide grooves are arranged obliquely along the outer side of the mounting shaft.

[0016] Further, torsional springs are arranged between the mounting sleeves, and two ends of each torsional spring are fixedly connected to the mounting sleeves.

[0017] Further, elastic members are arranged between the mounting sleeves and the fixing sleeves, two ends of each elastic member are fixedly connected to the mounting sleeves and the fixing sleeves, and the elastic members are sleeved outside the mounting shafts, so that the mounting sleeves are elastically slidably mounted on the mounting shafts.

[0018] Further, strip-shaped sliding grooves are arranged on both sides of the mounting shafts, and a sliding key is arranged inside the mounting sleeve, the sliding key is slidably arranged in the adjacent strip-shaped sliding groove, and the strip-shaped sliding grooves extend along the mounting shafts in the axial direction.

[0019] Further, the tail gas treatment device comprises a cyclone shell and no less than two feed inlets arranged outside the top of the cyclone shell, a central exhaust pipe penetrating through the top of the cyclone shell is arranged at the central position inside the cyclone shell, an outer vortex is arranged outside the central exhaust pipe, an inner vortex is arranged inside the central exhaust pipe, the upper part of the cyclone shell is cylindrical and the lower part is conical, and an ash discharge port is arranged at the bottom of the cyclone shell.

[0020] A utilization method of a mine-source solid waste-based synthetic soil preparation device, which comprises: feeding mine-source solid waste raw materials into a crushing and screening unit to perform crushing, grinding and screening treatment to obtain qualified mine-source solid waste powder;

[0021] According to weight parts, 60-80 parts of mine-source solid waste powder, 10-25 parts of organic modifier, 2-8 parts of binder and 0.5-2 parts of microbial agent are fed into a batching and mixing unit, and mixed under the condition of a stirring speed of 60-120 r / min for 10-30 minutes to obtain a mixture;

[0022] The mixture is transferred to a fermentation unit, the temperature in the fermentation unit is maintained at 22-37℃, the humidity is maintained at 40-70%, the oxygen concentration inside the stack is not less than 5%, and the fermentation and aging is performed for 7-21 days;

[0023] The material after fermentation and aging is fed into a granulation and drying unit to form particles with a particle size of 2-8 mm, and then dried to a water content of ≤10% to obtain a mine-source solid waste-based synthetic soil product, wherein dust-containing gas and odor gas generated in each step are sequentially treated by a tail gas treatment device for dust removal and deodorization before being discharged.

[0024] Compared with the prior art, the beneficial effects of the present application are that the present application integrates linkage of five function units of crushing screening, ingredient mixing, fermentation aging, granulation drying and tail gas treatment through a microcontroller, realizes automatic control and closed material conveying in the whole process from raw material input to finished product output. Compared with the dispersed and semi-automatic solid waste treatment production line in the prior art, the present application effectively reduces the material transfer link between processes, shortens the production cycle by more than 30%, improves the production efficiency, and at the same time avoids environmental dust pollution caused by material leakage. In the low viscosity stage, a large angle and a large range are adopted, although the contact area is large, the viscosity is low, and the total torque is small, so that the dispersion and mixing are quickly completed at a high speed, in the high viscosity stage, the range of the shrink blade is reduced, the angle is reduced, the contact area and the flow resistance of the blade and the material are greatly reduced, so that the motor maintains effective stirring at a medium speed without overloading, the wide stirring in the low viscosity stage of the present application establishes a macro convection cycle, realizes overall homogenization, the shrink stirring in the high viscosity stage forms a local strong shear zone, effectively breaks the agglomerates, and the continuous dynamic adjustment of the blade when the viscosity changes makes the flow field continuously reconfigure, prevents the material from entering the steady state, effectively improves the stirring effect. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of a mineral source solid waste based synthetic soil preparation device according to an embodiment of the present application.

[0026] Figure 2 It is a control principle diagram of a mineral source solid waste based synthetic soil preparation device according to an embodiment of the present application.

[0027] Figure 3 It is a structure schematic view of an ingredient mixing unit in a mineral source solid waste based synthetic soil preparation device according to an embodiment of the present application.

[0028] Figure 4 It is Figure 3 It is an enlarged view of A in FIG. 6.

[0029] Figure 5 It is a structure schematic view of a mounting shaft in a mineral source solid waste based synthetic soil preparation device according to an embodiment of the present application

[0030] Figure 6 It is a structure schematic view of a cyclone dust collector in a mineral source solid waste based synthetic soil preparation device according to an embodiment of the present application;

[0031] Figure 7 It is a flow chart of a utilization method of a mineral source solid waste based synthetic soil preparation device according to an embodiment of the present application; The present application has the advantages that the present application integrates linkage of five function units of crushing screening, ingredient mixing, fermentation aging,

[0032] In the figure: 10-pulverizing and screening unit, 20-ingredient mixing unit, 30-fermentation unit, 40-tail gas treatment device, 50-pelletizing and drying unit, 60-control system, 201-raw material bin, 202-stirring part, 203-stirring shaft, 204-stirring blade, 205-mounting shaft, 206-mounting sleeve, 207-driving part, 208-mounting circular groove, 209-guide rod, 210-guide groove, 211-mounting sleeve, 212-torsion spring, 213-elastic member, 214-fixing sleeve, 401-rotary dividing shell, 402-feeding port, 403-outer vortex, 404-inner vortex, 405-dust discharging port, 406-outer expansion sleeve, 407-dust blocking plate, 408-dust discharging pipe, 409-central exhaust pipe, 410-conical flow guide block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0034] Embodiment 1

[0035] Please refer to Figures 1-6 The structural diagram of the mineral source solid waste-based synthetic soil preparation device provided in Embodiment 1 of the present application, which comprises a pulverizing and screening unit 10, an ingredient mixing unit 20, a fermentation unit 30, a tail gas treatment device 40, a pelletizing and drying unit 50 and a control system 60. The pulverizing and screening unit 10 is used to sequentially crush, grind and screen the mineral source solid waste raw material to obtain mineral source solid waste powder with qualified particle size. The ingredient mixing unit 20 is connected with the output end of the pulverizing and screening unit 10 and is used to mix the mineral source solid waste powder with organic improver, binder and microbial inoculant according to a preset ratio to form a mixture. The fermentation unit 30 is connected with the output end of the ingredient mixing unit 20 and is used to ferment and age the mixture under the conditions of set temperature, humidity and oxygen concentration. The tail gas treatment device 40 is connected with the exhaust ports of the pulverizing and screening unit 10 and the fermentation unit 30 and is used to remove dust and odor from the dust-containing gas and odor gas generated during operation. The pelletizing and drying unit 50 is connected with the output end of the tail gas treatment device 40 and is used to pelletize and dry the fermented material to a preset moisture content, and the synthetic soil product is obtained after cooling and screening. The pulverizing and screening unit 10, the ingredient mixing unit 20, the fermentation unit 30, the tail gas treatment device 40 and the pelletizing and drying unit 50 are electrically connected with the control system 60, and the control system 60 is used to automatically control the coordinated operation of each unit according to preset process parameters.

[0036] The present application integrates linkage of five functional units of crushing and screening, ingredient mixing, fermentation and aging, granulation and drying, and tail gas treatment through a microcontroller, realizes automatic control of the whole process from raw material input to finished product output and closed material conveying. Compared with the existing technology of a decentralized and semi-automatic solid waste treatment production line, the present application effectively reduces the material transfer link between processes, shortens the production cycle by more than 30%, improves the production efficiency, and at the same time avoids environmental dust pollution caused by material leakage.

[0037] The ingredient mixing unit 20 comprises stirring components 202 arranged inside, which comprise a stirring shaft 203 and a plurality of stirring assemblies arranged on the stirring shaft 203 and capable of automatically adjusting the stirring range and stirring angle according to the stirring viscosity. In this way, the viscosity of the mixed material of the mine source solid waste-based synthetic soil changes by orders of magnitude at different process stages: it is a low-viscosity slurry at the initial stage, it rises to medium-viscosity at the middle stage due to water evaporation and binder hydration, and it may become a high-viscosity paste at the later stage. The existing fixed-parameter stirrer can only maintain good mixing effect in a certain viscosity range and appears uneven mixing, overload or even shutdown in other ranges when coping with such a wide viscosity range. The resistance of high-viscosity material to stirring blades is positively correlated with the area of blade immersion in the material and the blade angle. The fixed-parameter stirrer must be configured with a motor power according to the worst case, resulting in serious energy waste of large horse-drawn small carts at the low-viscosity stage. The present application adopts large-angle and large-range stirring at the low-viscosity stage, although the contact area is large but the viscosity is low, and the total torque is small, so that the dispersion and mixing are quickly completed at a high speed, the blade range is shrunk and the angle is reduced at the high-viscosity stage, the contact area and the resistance of the blade to the material flow are greatly reduced, and the motor maintains effective stirring at a medium speed without overload. The large-range stirring of the present application at the low-viscosity stage establishes macro convection circulation and realizes overall homogenization, the shrunk stirring at the high-viscosity stage forms a local strong shear zone and effectively breaks the cohesive aggregates, the continuous dynamic adjustment of the blade according to the viscosity change causes the flow field to be continuously reconstructed, prevents the material from entering a stable state of rotation, and effectively improves the stirring effect.

[0038] In some embodiments, the crushing and screening unit 10 comprises a feeding hopper, a multi-stage crushing device, a vibrating screening machine, and a return conveying belt. The mine source solid waste raw material is sequentially crushed, ground, and screened to obtain mine source solid waste powder with qualified particle size, and unqualified material is returned to the multi-stage crushing device for reprocessing through the return conveying belt. The multi-stage crushing device comprises a primary crusher and a secondary grinder.

[0039] In some embodiments, the fermentation unit 30 comprises a sealed fermentation bin, a plurality of material trays arranged in the fermentation bin, a temperature and humidity control device, a ventilation system, and a movable turning mechanism.

[0040] In some embodiments, the granulation and drying unit 50 comprises a granulator, a fluidized bed dryer and a cooling and screening machine connected in sequence, wherein the granulator, the fluidized bed dryer and the cooling and screening machine are all prior art and thus will not be described in more detail herein.

[0041] In some embodiments, the tail gas treatment device 40 comprises a cyclone dust collector and a biological deodorization tower, the air inlet of the cyclone dust collector is communicated with the air outlet of the crushing and screening unit 10 and the fermentation unit 30, and the air outlet of the cyclone dust collector is communicated with the air inlet of the biological deodorization tower. By setting the cyclone dust collector and the biological deodorization tower to respectively remove dust and odor, the emission of dust and odor is effectively reduced; the high-efficiency functional flora filled in the biological deodorization tower can specifically degrade typical malodorous components such as ammonia and hydrogen sulfide.

[0042] In some embodiments, the control system 60 comprises a controller, and the crushing and screening unit 10, the ingredient mixing unit 20, the fermentation unit 30, the tail gas treatment device 40 and the granulation and drying unit 50 are electrically connected with the controller.

[0043] The ingredient mixing unit 20 is provided with a raw material bin 201, which is arranged to add organic improvers, binders and microbial agents into the interior of the ingredient mixing unit 20.

[0044] As shown in Figure 3 , Figure 4 and Figure 5 , in some embodiments of the present application, the stirring assembly comprises a mounting sleeve 206, stirring blades 204 and a mounting shaft 205 fixedly mounted on the stirring shaft 203, the stirring blades 204 are fixedly mounted on the mounting sleeve 206, the mounting sleeve 206 is provided with a mounting circular groove 208 on one end close to the mounting shaft 205, the mounting shaft 205 is rotatably sleeved in the mounting sleeve 206, the mounting shaft 205 is sleeved with a mounting sleeve 211, the mounting sleeve 211 is arranged to elastically slide along the axial direction of the mounting shaft 205, the mounting sleeve 206 is elastically rotatably connected to the mounting sleeve 211, a plurality of guide grooves 210 are arranged in an array on the outer side of the mounting shaft 205, and a guide rod 209 is slidably arranged in each guide groove 210, and the guide rod 209 is fixedly mounted on the side wall of the mounting circular groove 208. The guide grooves 210 are arranged obliquely along the outer side of the mounting shaft 205, so that the guide rod 209 is close to the stirring shaft 203 when the resistance becomes large, so that the mounting sleeve 206 is deflected under the action of resistance when the viscosity is relatively large during stirring, the stirring angle is reduced, and the mounting sleeve 206 is close to the mounting shaft 205 under the action of the guide rod 209 and the guide groove 210, thereby reducing the stirring range, and when the viscosity of the mixture becomes small, the original stirring state is automatically restored under the action of elasticity, self-adaptive adjustment is realized, and the uniformity of mixing and the balance of energy consumption are ensured.

[0045] As some embodiments of the present application, the mounting sleeve 211 and the mounting sleeve 206 are provided with a torsion spring 212, both ends of the torsion spring 212 are fixedly connected to the mounting sleeve 211 and the mounting sleeve 206 respectively, so that the mounting sleeve 206 and the mounting sleeve 211 are elastically connected in rotation.

[0046] As some embodiments of the present application, the mounting sleeve 211 and the mounting sleeve 214 are provided with an elastic member 213, both ends of the elastic member 213 are fixedly connected to the mounting sleeve 211 and the mounting sleeve 214 respectively, the elastic member 213 is sleeved outside the mounting shaft 205, so that the mounting sleeve 211 is elastically and slidingly mounted on the mounting shaft 205. In order to further guide the sliding of the mounting sleeve 211, both sides of the mounting shaft 205 are provided with strip-shaped sliding grooves, and the inner side of the mounting sleeve 211 is provided with a sliding key which is slidingly arranged in the adjacent strip-shaped sliding groove, the strip-shaped sliding groove extends along the axis of the mounting shaft 205, ensuring that the sliding of 211 is stable and the guidance is accurate; the gap between the sliding key and the sliding groove is precisely controlled to ensure the coaxiality and response sensitivity of 211 during axial displacement.

[0047] As shown in Figure 6 As some embodiments of the present application, the cyclone dust collector comprises a cyclone shell 401 and not less than two feed ports 402 arranged outside the top of the cyclone shell 401, a center exhaust pipe 409 penetrating the top of the cyclone shell 401 is arranged at the inner center position of the cyclone shell 401, an outer vortex 403 is arranged outside the center exhaust pipe 409, an inner vortex 404 is arranged inside the center exhaust pipe 409, and the upper part of the cyclone shell 401 is cylindrical and the lower part is conical, and the bottom of the cyclone shell 401 is provided with a dust discharge port. In this way, dust is separated, the wear of a single inlet is reduced by arranging not less than two feed ports 402, and the maintenance frequency is reduced.

[0048] Since dust return mixing and entrainment at the dust discharge port 405 may occur during the processing, an inverted conical flow guide block 410 is arranged at the bottom of the center exhaust pipe 409, which is concentric with the center exhaust pipe 409, for destroying the periodic swing of the bottom stable vortex core and reducing the dust return mixing and entrainment at the dust discharge port.

[0049] To further eliminate dust back-mixing and entrainment, an outer expansion sleeve 406 is fitted on the outer side of the central exhaust pipe 409 at the middle position. The outer expansion sleeve 406 communicates with the inner wall of the central exhaust pipe 409 through a connecting hole on the side wall of the central exhaust pipe 409. Several dust baffles 407 are arrayed inside the outer expansion sleeve 406. The dust baffles 407 are evenly distributed radially along the outer expansion sleeve 406, and their ends are inclined towards the axis of 409, forming a multi-stage swirling disturbance field, which significantly enhances the gas-solid separation efficiency. Several dust discharge pipes 408 are provided on the dust baffles 407. The dust discharge pipes 408 extend axially along the central exhaust pipe 409, and the outlet of the dust discharge pipes 408 is located above the dust discharge port 405. In this way, the dust coming out of the cyclone in the central exhaust pipe 409 will hit the outer expansion sleeve 406, and then fall to the bottom of the swirl separator 401 through the dust discharge port 405.

[0050] Example 2

[0051] like Figure 7 As shown in the figure, an embodiment of the present invention also provides a method for preparing synthetic soil based on mineral solid waste, comprising:

[0052] S1. The mineral solid waste raw material is fed into the crushing and screening unit 10 for crushing, grinding and screening to obtain qualified mineral solid waste powder.

[0053] S2. By weight, 60-80 parts of mineral solid waste powder, 10-25 parts of organic amendment, 2-8 parts of binder, and 0.5-2 parts of microbial agent are fed into the batching and mixing unit 20 and mixed for 10-30 minutes at a stirring speed of 60-120 r / min to obtain the mixture.

[0054] In some embodiments, in step S2, 60-80 parts by weight of mineral solid waste powder, 10-25 parts by weight of organic amendment, 2-8 parts by weight of binder, and 0.5-2 parts by weight of microbial agent are fed into the batching and mixing unit 20 and mixed for 10-30 minutes at a stirring speed of 60-120 r / min to obtain a mixture comprising:

[0055] By weight, 60 parts of mineral solid waste powder, 10 parts of organic amendment, 2 parts of binder, and 2 parts of microbial agent are fed into the batching and mixing unit 20 and mixed for 10 minutes at a stirring speed of 60 r / min to obtain the mixture.

[0056] In some embodiments, in step S2, 60-80 parts by weight of mineral solid waste powder, 10-25 parts by weight of organic amendment, 2-8 parts by weight of binder, and 0.5-2 parts by weight of microbial agent are fed into the batching and mixing unit 20 and mixed for 10-30 minutes at a stirring speed of 60-120 r / min to obtain a mixture comprising:

[0057] S2, 80 parts by weight of the mineral solid waste powder, 25 parts by weight of the organic modifier, 8 parts by weight of the binder, and 0.5 parts by weight of the microbial agent are fed into the batching and mixing unit 20, and mixed at a stirring speed of 120 r / min for 30 minutes to obtain the mixed material.

[0058] In some embodiments, the S2, 60-80 parts by weight of the mineral solid waste powder, 10-25 parts by weight of the organic modifier, 2-8 parts by weight of the binder, and 0.5-2 parts by weight of the microbial agent are fed into the batching and mixing unit 20, and mixed at a stirring speed of 60-120 r / min for 10-30 minutes to obtain the mixed material, including:

[0059] S2, 65 parts by weight of the mineral solid waste powder, 15 parts by weight of the organic modifier, 4 parts by weight of the binder, and 1.5 parts by weight of the microbial agent are fed into the batching and mixing unit 20, and mixed at a stirring speed of 80 r / min for 15 minutes to obtain the mixed material.

[0060] In some embodiments, the S2, 60-80 parts by weight of the mineral solid waste powder, 10-25 parts by weight of the organic modifier, 2-8 parts by weight of the binder, and 0.5-2 parts by weight of the microbial agent are fed into the batching and mixing unit 20, and mixed at a stirring speed of 60-120 r / min for 10-30 minutes to obtain the mixed material, including:

[0061] S2, 75 parts by weight of the mineral solid waste powder, 20 parts by weight of the organic modifier, 6 parts by weight of the binder, and 1 part by weight of the microbial agent are fed into the batching and mixing unit 20, and mixed at a stirring speed of 100 r / min for 25 minutes to obtain the mixed material.

[0062] In some embodiments, the S2, 60-80 parts by weight of the mineral solid waste powder, 10-25parts by weight of the organic modifier, 2-8 parts by weight of the binder, and0.5-2 parts by weight of the microbial agent are fed into the batching and mixingunit 20, and mixed at a stirring speed of 60-120 r / min for 10 -30 minutes toobtain the mixed material, including:

[0063] S2, 70 parts by weight of the mineral solid waste powder, 18 parts by weight of the organic modifier, 5 parts by weight of the binder, and 1.2 parts by weight of the microbial agent are fed into the batching and mixing unit 20, mixed at a stirring speed of 90 r / min for 20 minutes to obtain the mixed material.

[0064] S3, the mixed material is transferred to the fermentation unit 30, the temperature in the fermentation unit 30 is maintained at 22-37℃, the humidity is maintained at 40-70%, the oxygen concentration in the stack is not less than 5%, and the fermentation aging is 7-21 days.

[0065] In some embodiments, S3, transferring the mixture to the fermentation unit 30, maintaining the temperature within the fermentation unit 30 at 22-37°C, the humidity at 40-70%, and the oxygen concentration inside the pile at not less than 5%, and fermenting and aging for 7-21 days, includes:

[0066] The mixture is transferred to fermentation unit 30, where the temperature is maintained at 22°C, the humidity at 40%, and the oxygen concentration inside the pile is not less than 5%. Fermentation and aging are carried out for 7 days.

[0067] In some embodiments, S3, transferring the mixture to the fermentation unit 30, maintaining the temperature within the fermentation unit 30 at 22-37°C, the humidity at 40-70%, and the oxygen concentration inside the pile at not less than 5%, and fermenting and aging for 7-21 days, includes:

[0068] The mixture is transferred to fermentation unit 30, where the temperature is maintained at 37°C, the humidity at 70%, and the oxygen concentration inside the pile is not less than 5%. Fermentation and aging takes 21 days.

[0069] In some embodiments, S3, transferring the mixture to the fermentation unit 30, maintaining the temperature within the fermentation unit 30 at 22-37°C, the humidity at 40-70%, and the oxygen concentration inside the pile at not less than 5%, and fermenting and aging for 7-21 days, includes:

[0070] The mixture is transferred to fermentation unit 30, where the temperature is maintained at 25°C, the humidity at 500%, and the oxygen concentration inside the pile is not less than 5%. Fermentation and aging are carried out for 10 days.

[0071] In some embodiments, S3, transferring the mixture to the fermentation unit 30, maintaining the temperature within the fermentation unit 30 at 22-37°C, the humidity at 40-70%, and the oxygen concentration inside the pile at not less than 5%, and fermenting and aging for 7-21 days, includes:

[0072] The mixture is transferred to fermentation unit 30, where the temperature is maintained at 35°C, the humidity at 60%, and the oxygen concentration inside the pile is not less than 5%. Fermentation and aging takes 18 days.

[0073] In some embodiments, S3, transferring the mixture to the fermentation unit 30, maintaining the temperature within the fermentation unit 30 at 22-37°C, the humidity at 40-70%, and the oxygen concentration inside the pile at not less than 5%, and fermenting and aging for 7-21 days, includes:

[0074] The mixture is transferred to fermentation unit 30, and the temperature and humidity inside fermentation unit 30 are maintained at 30°C and 55%, respectively. The oxygen concentration inside the pile is not less than 5%, and fermentation and aging are carried out for 14 days.

[0075] S4. The fermented and aged material is fed into the granulation and drying unit 50 to make particles with a particle size of 2-8mm, and then dried to a moisture content of ≤10% to obtain the finished product of mineral solid waste-based synthetic soil. The dust-containing gas and odor gas generated in each step are successively treated by the tail gas treatment device 40 for dust removal and deodorization before being discharged.

[0076] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0077] 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 invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0078] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 invention according to the specific circumstances.

[0079] In this invention, 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," "over," and "on top" of 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.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, 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.

[0081] 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 device for preparing synthetic soil based on mineral solid waste, characterized in that, It includes a crushing and screening unit (10) for crushing, grinding and screening mineral solid waste raw materials in sequence to obtain mineral solid waste powder with qualified particle size; The batching and mixing unit (20) is connected to the output end of the crushing and screening unit (10) and is used to mix mineral solid waste powder with organic amendment, binder and microbial agent according to a preset ratio to form a mixture; the batching and mixing unit (20) includes a stirring component (202) disposed inside it, the stirring component (202) includes a stirring shaft (203) and several stirring components disposed on the stirring shaft (203) that can automatically adjust the stirring range and stirring angle according to the stirring viscosity; The fermentation unit (30) is connected to the output end of the ingredient mixing unit (20) and is used to ferment and age the mixed materials under set temperature, humidity and oxygen concentration conditions. The exhaust gas treatment device (40) has its input end connected to the exhaust port of the crushing and screening unit (10) and the fermentation unit (30), and is used to remove dust and odor from the dust-containing gas and odor gas during operation. The granulation and drying unit (50) is connected to the output end of the tail gas treatment device (40) and is used to granulate the fermented material and dry it to a preset moisture content. After cooling and screening, the synthetic soil product is obtained. as well as, The control system (60) is electrically connected to the crushing and screening unit (10), the batching and mixing unit (20), the fermentation unit (30), the tail gas treatment device (40), and the granulation and drying unit (50). The control system (60) is used to automatically control the coordinated operation of each unit according to the preset process parameters.

2. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 1, characterized in that, The crushing and screening unit (10) includes a feed hopper, a multi-stage crushing device, a vibrating screen and a return conveyor belt.

3. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 1, characterized in that, The exhaust gas treatment device (40) includes a cyclone dust collector and a biological deodorization tower. The air inlet of the cyclone dust collector is connected to the exhaust outlet of the crushing and screening unit (10) and the fermentation unit (30), and the air outlet of the cyclone dust collector is connected to the air inlet of the biological deodorization tower.

4. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 1, characterized in that, The mixing unit (20) is provided with a raw material silo (201) to add organic modifiers, binders and microbial agents into the mixing unit (20).

5. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 1, characterized in that, The stirring assembly includes a mounting sleeve (206), a stirring blade (204), and a mounting shaft (205) fixedly mounted on a stirring shaft (203). The stirring blade (204) is fixedly mounted on the mounting sleeve (206). A mounting groove (208) is provided on one end of the mounting sleeve (206) near the mounting shaft (205). The mounting shaft (205) is rotatably fitted in the mounting sleeve (206). A mounting sleeve (211) is fitted on the mounting shaft (205). The mounting sleeve (211) is elastically slidably arranged along the axial direction of the mounting shaft (205). The mounting sleeve (206) is elastically rotatably connected to the mounting sleeve (211). A plurality of guide grooves (210) are arranged in an array on the outer side of the mounting shaft (205), and a guide rod (209) is slidably arranged in each guide groove (210). The guide rod (209) is fixedly mounted on the side wall of the mounting groove (208). The guide grooves (210) are arranged obliquely along the outer side of the mounting shaft (205).

6. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 5, characterized in that, A torsion spring (212) is provided between the mounting sleeve (211) and the mounting sleeve (206), and the two ends of the torsion spring (212) are fixedly connected to the mounting sleeve (211) and the mounting sleeve (206) respectively.

7. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 6, characterized in that, An elastic element (213) is provided between the mounting sleeve (211) and the fixing sleeve (214). The two ends of the elastic element (213) are fixedly connected to the mounting sleeve (211) and the fixing sleeve (214) respectively. The elastic element (213) is sleeved on the outside of the mounting shaft (205), so that the mounting sleeve (211) is elastically slidably mounted on the mounting shaft (205).

8. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 7, characterized in that, The mounting shaft (205) has strip-shaped grooves on both sides, and the mounting sleeve (211) has a sliding key on the inner side. The sliding key is slidably disposed in the adjacent strip-shaped grooves, which extend along the axial direction of the mounting shaft (205).

9. The apparatus for preparing synthetic soil based on mineral solid waste according to claim 3, characterized in that, The exhaust gas treatment device (40) includes a swirl separator (401) and at least two feed inlets (402) located on the outer side of the top of the swirl separator (401). A central exhaust pipe (409) penetrating the top of the swirl separator (401) is provided at the center of the interior. An outer vortex (403) is provided on the outer side of the central exhaust pipe (409), and an inner vortex (404) is provided inside the central exhaust pipe (409). The upper part of the swirl separator (401) is cylindrical and the lower part is conical. An ash discharge port is provided at the bottom of the swirl separator (401).

10. A method for utilizing the mineral-based solid waste-based synthetic soil preparation apparatus as described in any one of claims 1-9, characterized in that, It includes: Mineral solid waste raw materials are fed into the crushing and screening unit (10) for crushing, grinding and screening to obtain qualified mineral solid waste powder. By weight, 60-80 parts of mineral solid waste powder, 10-25 parts of organic amendment, 2-8 parts of binder, and 0.5-2 parts of microbial agent are fed into the batching and mixing unit (20) and mixed for 10-30 minutes at a stirring speed of 60-120 r / min to obtain the mixture. The mixture is transferred to the fermentation unit (30), and the temperature in the fermentation unit (30) is maintained at 22-37℃, the humidity is maintained at 40-70%, the oxygen concentration inside the pile is not less than 5%, and the fermentation and aging takes 7-21 days. The fermented and aged material is sent to the granulation and drying unit (50) to make particles with a particle size of 2-8mm, and then dried to a moisture content of ≤10% to obtain the finished product of mineral solid waste-based synthetic soil. The dust-containing gas and odor gas generated in each step are successively treated by the tail gas treatment device (40) for dust removal and deodorization before being discharged.

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