Production equipment for mine filling cementing material

Abstract

The invention relates to the technical field of cementing material equipment, and particularly provides production equipment for a mine filling cementing material. The production equipment for the mine filling cementing material comprises a wet-process tailing impurity removal system, a drying dehydration system, a grinding batching system and a waste gas treatment system. According to the invention, the solid waste components can be dynamically monitored in real time, whether abnormal conditions occur in the solid waste to be mixed or not can be found in time, the conveying capacity of the proportioning conveyor is automatically adjusted according to the real-time monitoring data, the proportion of cement clinker, the solid waste and an exciting agent is dynamically adjusted, rapid response and adaptation to the fluctuation of the raw material components are realized, and the production efficiency is improved. According to the present invention, the mixing uniformity and the stable performance of the cementing material can be ensured, in addition, the gelation waste gas generated during the drying dehydration process can be subjected to multi-stage gas flow gathering, collision coalescence and uniform wind treatment so as to improve the dust collection efficiency, and then the dust is effectively filtered through the dust filtration cloth bag so as to significantly reduce the emission of the harmful substances in the tail gas and achieve the efficient purification of the tail gas.

Description

Technical Field

[0001] This invention relates to the field of cementitious material equipment technology, and in particular to a production equipment for cementitious materials used in mine backfilling. Background Technology

[0002] With the continuous development of mine backfilling technology, production equipment for mine backfilling cementitious materials (especially special cementitious materials mainly composed of industrial solid waste) plays an important role in the resource utilization of industrial solid waste. Since cementitious materials in mining areas require the incorporation of large amounts of industrial solid waste (such as tailings, coal gangue, slag, fly ash, etc.), the chemical composition, physical form, and activity of these solid wastes vary greatly. Furthermore, the composition of solid waste from different batches of the same ore source may fluctuate drastically. Existing equipment has limited capacity to remove harmful impurities from industrial solid waste, especially in the wet tailings impurity removal and drying / grinding stages. The lack of efficient online component monitoring and intelligent adjustment systems leads to an inability to respond to and adjust fluctuations in solid waste composition in a timely manner. This directly affects the proportion control of cement clinker and solid waste, resulting in unstable cementitious material performance, reduced product quality and service life, and ultimately impacting the safety and economic benefits of mine backfilling. In addition, due to differences in raw material sources, the concentration of heavy metals and aerosol particles in the gelled waste gas generated during the drying and dehydration process of industrial solid waste often experiences sudden spikes. At the same time, during the grinding and drying of gelling materials, submicron-sized dust (PM1.0 accounting for >30%) is easily formed and combines with SO2 / Hg to form stable aerosols, making it difficult for harmful substances in the waste gas to be effectively captured and decomposed. This results in low waste gas treatment efficiency, which not only causes pollutant emissions to exceed standards, causing environmental pollution and ecological damage, but may also lead to problems such as equipment blockage and unstable operation, increasing maintenance costs and safety hazards. Summary of the Invention

[0003] Therefore, it is necessary to provide a production equipment for mine filling cementitious materials to solve at least one of the technical problems in the background art.

[0004] A production equipment for mine backfill cementitious materials includes a wet tailings removal system, a drying and dewatering system, a grinding and batching system, and a waste gas treatment system. The wet tailings removal system removes harmful impurities from industrial solid wastes such as tailings, slag, and coal gangue through magnetic separation, flotation, and screening to form wet tailings. The drying and dewatering system includes a deep cone thickener, a high-pressure diaphragm filter press, and a rotary dryer. All three are installed on the outside of the installation site. The deep cone thickener and high-pressure diaphragm filter press are used for preliminary dewatering of the wet tailings, reducing the moisture content to <15%, before feeding it into the rotary dryer for further drying. The grinding and batching system includes a liquid nitrogen-cooled mill, an XRF analyzer, a clinker conveyor, and a pipeline mixer. The XRF analyzer and proportioning conveyor are both installed at one end of the installation ground. The liquid nitrogen-cooled mill performs low-temperature grinding on the re-dried wet tailings to form solid waste to be mixed, which is then fed into the pipeline mixer. The XRF analyzer continuously analyzes the solid waste to be mixed and sends the signal to the feeding conveyor. The clinker conveyor is used to proportionally and in real time deliver cement clinker and activator to the pipeline mixer based on the real-time analysis data from the XRF analyzer. The exhaust gas treatment system includes a dust collector cooler, a wet desulfurization tower, and an adsorption bed. The dust collector cooler, wet desulfurization tower, and adsorption bed are all installed at the end of the installation ground away from the grinding and batching system. The dust collector cooler cools and removes dust from the exhaust gas generated by the drying and dehydration system to form pre-treated exhaust gas. The wet desulfurization tower and adsorption bed desulfurize and adsorb heavy metal vapors from the pre-treated exhaust gas.

[0005] As a further improvement of the present invention, the dust collector cooler includes a dust collector housing assembly, an air inlet regulating assembly, a bag filter assembly, and a dust collector outlet pipe. The dust collector housing assembly includes a raised base frame, a dust collector intermediate shell, an air distribution inner shell, and an air outlet outer shell. The bottom of the raised base frame is installed on the inner side of the installation ground, away from the grinding and batching system. The dust collector intermediate shell is hollow inside, forming a hollow cavity. The bottom of the dust collector intermediate shell is installed on the top of the raised base frame. The outer side of the air distribution inner shell is installed on the inner side of the dust collector intermediate shell. The outer side of the air outlet outer shell is installed on the inner side of the air outlet outer shell. The bottom of the air inlet regulating assembly is installed on the top of the dust collector intermediate shell. The bag filter assembly is installed in the hollow cavity. The dust collector outlet pipe is installed at the bottom of the outer side of the air outlet outer shell.

[0006] As a further improvement of the present invention, multiple vertical grooves are recessed at intervals along the length direction on both sides of the hollow cavity. A vertical gradient rod slides at both ends of each vertical groove. A vertical adjustment cylinder is provided at the top of each vertical gradient rod. Multiple bag rotating shafts are arranged at intervals along the height direction between two vertical gradient rods. A mounting plate is rotatably arranged in the middle of each bag rotating shaft. A bag mounting hole is recessed in the middle of the side wall of the mounting plate. Multiple air inlets are recessed at intervals along the length direction on the top of the hollow cavity. An air inlet pipe is protruded from each air inlet. Multiple connecting grooves are protruded at intervals along the height direction on the top inner side of the hollow cavity. Multiple dust collection grooves are recessed at intervals along the length direction on the bottom surface of the hollow cavity. A dust collection hopper is protruded from each dust collection groove.

[0007] As a further improvement of the present invention, the inner cavity of the air distribution shell is connected to multiple vertical grooves and multiple connecting grooves on the inner side of the hollow cavity, the inner cavity of the air outlet shell is connected to multiple vertical grooves on the outer side of the hollow cavity, and multiple air outlet holes are recessed on the bottom surface of the air outlet shell, and each air outlet hole is provided with an air outlet pipe.

[0008] As a further improvement of the present invention, the top of the dust removal outlet pipe is connected to multiple air outlet pipes, and an air outlet groove is protruding on the outer side of the dust removal outlet pipe. Multiple back-blowing devices are spaced apart along the length direction on the outer side of the air outlet shell. Multiple back-blowing nozzles are spaced apart along the height direction at both ends of each back-blowing device, and the inner side of each back-blowing nozzle is inserted into the internal cavity of the air outlet shell.

[0009] As a further improvement of the present invention, each bag assembly includes multiple bag elements, which are respectively installed on bag rotating shafts of multiple vertical slots. Each bag element includes a compression strip group, a synchronous air guiding arc plate, and multiple bag elastic sleeves. The top of the compression strip group is installed in the middle of the top surface of the hollow cavity. The two sides of the synchronous air guiding arc plate are respectively installed on the top of two mounting rotating plates at the top of the hollow cavity. A preset through groove is recessed in the middle of the top surface of the synchronous air guiding arc plate. The bottom of the compression strip group passes through the preset through groove and is connected to the bottom surface of the hollow cavity. The two sides of the multiple bag elastic sleeves are respectively installed on the bag mounting holes of the multiple mounting rotating plates along the height direction. A dust filter bag tube is sleeved on each bag elastic sleeve.

[0010] As a further improvement of the present invention, each extrusion strip group includes two symmetrically arranged corrugated extrusion strips and two end crossbars. The tops of the two corrugated extrusion strips are installed in the middle of the top surface of the hollow cavity, and the bottoms of the two corrugated extrusion strips are respectively installed in the middle of the bottom surface of the hollow cavity. The two ends of the two end crossbars are respectively installed at the top and bottom of the two corrugated extrusion strips.

[0011] As a further improvement of the present invention, the intake regulating assembly includes an intake pipe, two opposing coalescing elements and an air equalization element. The bottom of the intake pipe is installed on the top of multiple intake pipes. Intake guide bends are respectively provided at both ends of the intake pipe. Coalescing turntables are respectively protruded at both ends of the top surface of the intake pipe. The two opposing coalescing elements are respectively installed at both ends of the intake pipe and are symmetrically arranged between the two opposing coalescing elements. The air equalization element is installed inside the intake pipe and in the two opposing coalescing elements.

[0012] As a further improvement of the present invention, each counter-fusing element includes a gas-gathering cone tube, a semi-circular arc plate, an inclined jet pipe, and a coalescing adjustment cylinder. The outer end of the gas-gathering cone tube is installed on one end of the inner wall of the air inlet pipe, the outer end of the semi-circular arc plate is installed on the top of the inner end of the gas-gathering cone tube, the outer end of the inclined jet pipe is installed on the inner end of the gas-gathering cone tube, the top of the coalescing adjustment cylinder is rotatably installed in the coalescing turntable, and the output shaft at the bottom of the coalescing adjustment cylinder abuts against the outer wall of the semi-circular arc plate.

[0013] As a further improvement of the present invention, the gas equalization element includes a middle partition plate, two gas equalization rotating platforms and a gas equalization rotating roller. The two sides of the middle partition plate are respectively installed on both sides of the inner wall of the inclined jet pipe, and the two ends of the middle partition plate are respectively installed in the middle of the gas gathering cone pipe. An air curtain groove is recessed in the middle of the top surface of the middle partition plate. The tops of the two gas equalization rotating platforms are respectively installed at the bottom of the inner ends of the two gas gathering cone pipes, and the two ends of the gas equalization rotating roller are respectively rotatably installed at the bottom of the two gas equalization rotating platforms.

[0014] The beneficial effects of this invention are as follows: 1. This project enables real-time dynamic monitoring of solid waste composition, timely detection of any abnormalities in the solid waste to be mixed, and rapid triggering of alarms. Based on real-time monitoring data, it automatically adjusts the conveying capacity of the mixing conveyor, dynamically adjusting the ratio of cement clinker, solid waste, and activator, achieving rapid response and adaptation to fluctuations in raw material composition, ensuring uniform mixing and stable performance of cementitious materials, and improving the level of intelligence in the production process. In addition, it can treat the cementitious waste gas generated during the drying and dehydration process through multi-stage airflow aggregation, collision agglomeration, and uniform airflow treatment, improving dust collection efficiency. Subsequently, it is effectively filtered through dust filter bags, and finally, the exhaust gas enters the wet desulfurization tower and adsorption bed to complete the desulfurization and heavy metal vapor adsorption treatment, significantly reducing the emission of harmful substances in the exhaust gas, achieving efficient purification of the exhaust gas, and protecting the environment.

[0015] 2. This system can automatically activate the adjustment mechanism when there is a sudden surge in heavy metal concentration in the exhaust gas. By enhancing the collision and aggregation of particulate matter in the exhaust gas, dust and heavy metal particles are more easily aggregated into larger particles, facilitating subsequent filtration and settling, thus improving dust removal efficiency. Furthermore, the system compresses and reduces the diameter of the filter bags in the middle, increasing the contact area and mass transfer intensity between the airflow and the filter medium, enhancing the capture and adsorption capacity of pollutants in the exhaust gas, and improving the dust removal effect. Additionally, it reduces the inclination of the synchronous air guide plate, slowing down the output flow rate of high-concentration exhaust gas, increasing the residence time of the exhaust gas in the treatment device, and ensuring that the standing wave field excitation ceramic plate can effectively resonate and break up aerosol aggregates in high-concentration exhaust gas, promoting the breakage and decomposition of harmful particles, improving the depth and thoroughness of exhaust gas purification. This achieves the purpose of dynamically adjusting the airflow structure and the state of the dust removal device, avoiding insufficient exhaust gas treatment capacity leading to excessive pollutant emissions, and ensuring environmental compliance and production safety. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present invention.

[0017] Figure 2 This is a perspective view of another embodiment of the present invention.

[0018] Figure 3 This is a three-dimensional schematic diagram of a dust removal cooler according to an embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of a dust collector cooler in one embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the internal structure of a dust collector cooler in another embodiment of the present invention.

[0021] Figure 6 This is an internal schematic diagram of the dust collector housing assembly and the filter bag assembly in one embodiment of the present invention.

[0022] Figure 7 This is a schematic diagram of the internal structure of the intake regulating component in one embodiment of the present invention.

[0023] In the picture: 10. Drying and dehydration system; 20. Grinding and batching system; 30. Exhaust gas treatment system; 31. Dust collector cooler; 40. Dust collector housing assembly; 41. Elevated base frame; 42. Dust collector intermediate shell; 43. Air distribution inner shell; 44. Air outlet shell; 421. Hollow cavity; 422. Vertical groove; 423. Vertical gradient bar; 424. Bag filter shaft; 420. Mounting plate; 46. Bag filter mounting hole; 425. Air inlet; 426. Air inlet pipe; 427. Connecting groove; 428. Dust collection trough; 429. Material dust hopper; 441. Air outlet; 442. Air outlet pipe; 443. Backflush device; 444. Backflush nozzle; 60. Bag assembly; 61. Bag element; 611. Extrusion strip assembly; 612. Synchronous air guide arc plate; 613. Bag elastic sleeve; 614. Preset passage groove; 615. Corrugated extrusion strip; 616. End crossbar; 50. Air inlet adjustment assembly; 51. Air inlet pipe; 511. Inlet guide bend pipe; 52. Counter-current aggregation element; 53. Air equalization element; 521. Air gathering cone pipe; 522. Semi-circular arc plate; 523. Inclined jet pipe; 524. Aggregation adjustment cylinder; 531. Intermediate partition plate; 532. Air equalization rotating table; 533. Air equalization rotating roller; 534. Air curtain passage groove; 70. Dust removal outlet pipe; 71. Air outlet passage groove. Detailed Implementation

[0024] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0025] In the description of this invention, it should be noted that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Please see Figures 1 to 7Production equipment for mine backfill cementitious materials includes a wet tailings removal system, a drying and dewatering system 10, a grinding and batching system 20, and a waste gas treatment system 30. The wet tailings removal system removes harmful impurities from industrial solid wastes such as tailings, slag, and coal gangue through magnetic separation, flotation, and screening to form wet tailings. The drying and dewatering system 10 includes a deep cone thickener, a high-pressure diaphragm filter press, and a rotary dryer. These components are all installed outside the installation site. The deep cone thickener and high-pressure diaphragm filter press are used for preliminary dewatering of the wet tailings, reducing the moisture content to <15%, before feeding it into the rotary dryer for further drying. The grinding and batching system 20 includes a liquid nitrogen-cooled mill, an XRF analyzer, a clinker conveyor, and a pipeline mixer. The machines are all installed at one end inside the installation ground. The liquid nitrogen-cooled mill performs low-temperature grinding on the re-dried wet tailings, so that the grinding process temperature is <90℃, to form solid waste to be mixed. The solid waste to be mixed is then fed into the pipeline mixer. The XRF analyzer will continuously analyze the solid waste to be mixed 1-3 times per second and send the signal to the feeding conveyor. The clinker conveyor is used to deliver cement clinker and activator to the pipeline mixer in real time according to the real-time analysis data of the XRF analyzer. The exhaust gas treatment system 30 includes a dust collector 31, a wet desulfurization tower and an adsorption bed. The dust collector 31, the wet desulfurization tower and the adsorption bed are all installed at the end of the installation ground away from the grinding and batching system 20. The dust collector 31 cools and removes dust from the exhaust gas generated by the drying and dehydration system 10 to form pre-treated exhaust gas. The wet desulfurization tower and the adsorption bed will desulfurize and adsorb heavy metal vapors from the pre-treated exhaust gas.

[0028] The dust collector cooler 31 includes a dust collector housing assembly 40, an air inlet regulating assembly 50, a bag filter assembly 60, and a dust collector outlet pipe 70. The dust collector housing assembly 40 includes a raised base frame 41, a dust collector intermediate shell 42, an air distribution inner shell 43, and an air outlet outer shell 44. The bottom of the raised base frame 41 is installed on the inner side of the installation ground, away from the grinding and batching system 20. The dust collector intermediate shell 42 is hollow inside, forming a hollow cavity 421. The bottom of the dust collector intermediate shell 42 is installed on the top of the raised base frame 41. The outer side of the air distribution inner shell 43 is installed on the inner side of the dust collector intermediate shell 42. The outer side of the air outlet outer shell 44 is installed on the inner side of the air outlet outer shell 44. The bottom of the air inlet regulating assembly 50 is installed on the top of the dust collector intermediate shell 42. The bag filter assembly 60 is installed in the hollow cavity 421. The dust collector outlet pipe 70 is installed at the bottom of the outer side of the air outlet outer shell 44.

[0029] The hollow cavity 421 has multiple vertical grooves 422 recessed along its length on both sides. Each vertical groove 422 has a vertical gradient rod 423 sliding at both ends. Each vertical gradient rod 423 has a vertical adjustment cylinder at its top. Multiple bag shafts 424 are spaced apart along the height between two vertical gradient rods 423. Each bag shaft 424 has a mounting plate 420 rotatably mounted in the middle. The mounting plate 420 has a bag mounting hole 46 recessed in the middle of its side wall. The top of the hollow cavity 421 has multiple air inlets 425 recessed along its length. Each air inlet 425 has an air inlet pipe 426 protruding from it. The top of the inner side of the hollow cavity 421 has multiple connecting grooves 427 protruding along the height. The bottom surface of the hollow cavity 421 has multiple dust collection grooves 428 recessed along its length. Each dust collection groove 428 has a dust hopper 429 protruding from it.

[0030] The internal cavity of the air distribution shell 43 is connected to multiple vertical grooves 422 and multiple connecting grooves 427 on the inner side of the hollow cavity 421. The internal cavity of the air outlet shell 44 is connected to multiple vertical grooves 422 on the outer side of the hollow cavity 421. Multiple air outlet holes 441 are recessed on the bottom surface of the air outlet shell 44, and each air outlet hole 441 is provided with an air outlet pipe 442.

[0031] The top of the dust removal outlet pipe 70 is connected to multiple air outlet pipes 442. An air outlet groove 71 protrudes from the outside of the dust removal outlet pipe 70. Multiple back-blowing nozzles 443 are spaced apart along the length direction on the outside of the air outlet housing 44. Multiple back-blowing nozzles 444 are spaced apart along the height direction at both ends of each back-blowing nozzle 443. The inner side of each back-blowing nozzle 444 is inserted into the internal cavity of the air outlet housing 44.

[0032] Each bag assembly 60 includes multiple bag elements 61, which are respectively mounted on bag rotating shafts 424 of multiple vertical slots 422. Each bag element 61 includes a compression strip group 611, a synchronous air guiding arc plate 612, and multiple bag elastic sleeves 613. The top of the compression strip group 611 is mounted on the middle of the top surface of the hollow cavity 421. The two sides of the synchronous air guiding arc plate 612 are respectively mounted on the top of two mounting rotating plates 420 at the top of the hollow cavity 421 and connected. A preset through groove 614 is recessed in the middle of the top surface of the synchronous air guiding arc plate 612. The bottom of the compression strip group 611 passes through the preset through groove 614 and is connected to the bottom surface of the hollow cavity 421. The two sides of the multiple bag elastic sleeves 613 are respectively mounted on the bag mounting holes 46 of the multiple mounting rotating plates 420 along the height direction. A dust filter bag tube is fitted on each bag elastic sleeve 613.

[0033] Each extrusion strip group 611 includes two symmetrically arranged corrugated extrusion strips 615 and two end crossbars 616. The tops of the two corrugated extrusion strips 615 are installed in the middle of the top surface of the hollow cavity 421, and the bottoms of the two corrugated extrusion strips 615 are respectively installed in the middle of the bottom surface of the hollow cavity 421. The two ends of the two end crossbars 616 are respectively installed at the top and bottom of the two corrugated extrusion strips 615.

[0034] The intake regulating assembly 50 includes an intake pipe 51, two opposing coalescing elements 52, and an air equalization element 53. The bottom of the intake pipe 51 is installed on the top of multiple intake pipes 426. Intake guide bends 511 are respectively provided at both ends of the intake pipe 51. Coalescing turntables are respectively protruded at both ends of the top surface of the intake pipe 51. The two opposing coalescing elements 52 are respectively installed at both ends of the intake pipe 51, and the two opposing coalescing elements 52 are symmetrically arranged. The air equalization element 53 is installed inside the intake pipe 51 and in the two opposing coalescing elements 52.

[0035] Each counter-flush element 52 includes a conical gas-gathering tube 521, a semi-circular arc plate 522, an inclined jet pipe 523, and a convergence regulating cylinder 524. The outer end of the conical gas-gathering tube 521 is installed on one end of the inner wall of the air inlet pipe 51. The outer end of the semi-circular arc plate 522 is installed on the top of the inner end of the conical gas-gathering tube 521. The outer end of the inclined jet pipe 523 is installed on the inner end of the conical gas-gathering tube 521. The top of the convergence regulating cylinder 524 is rotatably installed in the convergence turntable. The output shaft at the bottom of the convergence regulating cylinder 524 abuts against the outer wall of the semi-circular arc plate 522.

[0036] The air equalization element 53 includes a middle partition plate 531, two air equalization rotating platforms 532 and an air equalization rotating roller 533. The two sides of the middle partition plate 531 are respectively installed on the inner walls of the inclined jet pipe 523, and the two ends of the middle partition plate 531 are respectively installed in the middle of the air-gathering cone pipe 521. An air curtain groove 534 is recessed in the middle of the top surface of the middle partition plate 531. The tops of the two air equalization rotating platforms 532 are respectively installed at the bottom of the inner ends of the two air-gathering cone pipes 521, and the two ends of the air equalization rotating roller 533 are respectively rotatably installed at the bottom of the two air equalization rotating platforms 532.

[0037] For example, in one embodiment: the mounting plate 420 is connected to the bag filter shaft 424 via a torsion spring. The semi-circular plate 522 and the inclined jet pipe 523 are both made of elastic material. The drying exhaust gases from the deep cone thickener, high-pressure diaphragm filter press, and rotary dryer are all piped into the exhaust gas output main pipe. A distribution pipe is installed inside the exhaust gas output main pipe, with both ends connected to two inlet guide bends 511. The cross-sectional shape of the middle section of the bag filter elastic sleeve 613 is hourglass-shaped, and the filter bag tube is a Venturi tube. The outlet duct 71 is connected to the output pipe, and the other end of the output pipe is connected to the wet desulfurization tower and adsorption bed to send the pre-treated exhaust gas to the wet desulfurization tower and adsorption bed for desulfurization and heavy metal vapor adsorption. The hollow cavity 421 is provided with multiple standing wave field excitation ceramic plates at intervals along its length, and the multiple standing wave field excitation ceramic plates are alternately arranged with multiple bag elements 61 to generate a standing sound field, which causes the aerosol particles in the exhaust gas in the dust filter bag tube to resonate and break, releasing the adsorbed heavy metal vapor.

[0038] For example, in one embodiment: when producing cementitious materials, industrial solid waste is fed into a wet tailings impurity removal system. The wet tailings impurity removal system removes harmful impurities and sends the waste to a drying and dehydration system 10 and a liquid nitrogen-cooled mill for drying and low-temperature grinding. Subsequently, an XRF analyzer continuously analyzes the solid waste to be mixed at 1-3 times per second to monitor the ratio of CaO to SiO2. The conveying capacity of the proportioning conveyor is adjusted in real time according to the monitoring results. When the CaO content suddenly drops by more than 2% or the SO2 exceeds the standard by more than 0.8%, an alarm is triggered within 10 seconds. The proportioning conveyor adjusts the ratio of cement clinker (20%-50%), solid waste (30%-70%), and activator (0.5%-5%) in real time according to the fluctuation of solid waste composition and sends the waste to a pipeline mixer for mixing. This allows for rapid adaptation and adjustment of the mixing and feeding ratios based on the raw material characteristics and drying and grinding level of the industrial solid waste, achieving intelligent joint control.

[0039] For example, in one embodiment: when the drying and dehydration system 10 is performing drying and dehydration, gelled waste gas is generated and sent to two guide bends 511 through the tail gas output main pipe and the equalization gas pipe. Then, after being gathered by the gas-gathering cone pipe 521, it is sent to the inclined jet pipe 523. Then, it is guided by the inclined jet pipe 523 at a 60° angle to guide the dust to collide and agglomerate. After agglomeration, it is sent to the bottom of the air inlet pipe 51 through the air curtain channel 534 and impacts the equalization roller 533, driving it to rotate and equalize the air, which is then sent to multiple air inlet pipes 426. The gas is fed into the hollow cavity 421 through the air pipe 426, and then guided by multiple inclined synchronous air guide arc plates 612 below, and sent to multiple connecting slots 427. It then enters the internal cavity of the uniform air shell 43, and then enters the dust filter bag tube through multiple bag mounting holes 46 inside the hollow cavity 421 for dust filtration. Subsequently, the pre-treated exhaust gas is sent to the dust removal outlet pipe 70 through the internal cavity of the exhaust shell 44, and then sent to the wet desulfurization tower and adsorption bed for desulfurization and heavy metal vapor adsorption through the exhaust channel 71 and the output pipe.

[0040] For example, in one embodiment: when there is a sudden surge in the concentration of heavy metals in the exhaust gas, the agglomeration regulating cylinder 524 will be activated, causing its output shaft to extend, thereby pushing the semi-circular arc plate 522 and the inclined jet pipe 523, thus increasing the impact angle of the agglomerated exhaust gas flowing out of the inclined jet pipe 523 and increasing the collision agglomeration force. At the same time, multiple vertical regulating cylinders located outside the hollow cavity 421 will be activated, thereby driving multiple vertical gradient rods 423 connected to them to move downward, thereby causing the connected bag rotating shaft 424 and the mounting rotating plate 420 to move accordingly, thereby causing the bag elastic sleeve 613 and As the dust filter bag tube moves, and because it is equipped with two symmetrically arranged corrugated extrusion strips 615 in its middle section, when the elastic sleeve 613 of the filter bag and the dust filter bag tube move from the inclined direction to the horizontal direction, the two corrugated extrusion strips 615 will squeeze the middle section of the elastic sleeve 613 of the filter bag and the dust filter bag tube, thereby compressing and changing the diameter of the middle section, enhancing the gas-liquid mass transfer, and at the same time reducing the inclination of the synchronous air guide arc plate 612, thereby slowing down the output flow rate of high-concentration exhaust gas and increasing its residence time, so as to ensure the resonance breaking level of the standing wave field excitation ceramic plate for high-concentration exhaust gas and ensure the breaking of aerosol agglomeration.

[0041] Installation process: The deep cone thickener, high-pressure diaphragm filter press, and rotary dryer are all installed on the outside of the installation ground. The liquid nitrogen-cooled mill, XRF analyzer, and proportioning conveyor are all installed on one end of the installation ground inside the installation ground. The dust collector cooler 31, wet desulfurization tower, and adsorption bed are all installed on the end of the installation ground inside the installation ground away from the grinding and batching system 20. The bottom of the raised base frame 41 is installed on the end of the installation ground inside the installation ground away from the grinding and batching system 20. The bottom of the dust collector intermediate shell 42 is installed on the top of the raised base frame 41. The outer side of the inner shell 43 is installed inside the dust collector intermediate shell 42, and the outer side of the air outlet shell 44 is installed inside the air outlet shell 44. The top of the dust collector outlet pipe 70 is connected to multiple air outlet pipes 442. Multiple bag elements 61 are respectively installed on the bag rotating shafts 424 of multiple vertical slots 422. The top of the extrusion strip group 611 is installed in the middle of the top surface of the hollow cavity 421. The two sides of the synchronous air guiding arc plate 612 are respectively installed on the top of the two mounting rotating plates 420 at the top of the hollow cavity 421 and connected. The bottom of the extrusion strip group 611 passes through... The device is connected to the bottom surface of the hollow cavity 421 via a pre-set groove 614. Multiple elastic bag holders 613 are mounted on both sides of multiple mounting plates 420 along the height direction, with the bottom of the air inlet pipe 51 mounted on the top of multiple air inlet pipes 426. The outer end of the air-gathering cone pipe 521 is mounted on one end of the inner wall of the air inlet pipe 51. The outer end of the semi-circular arc plate 522 is mounted on the top of the inner end of the air-gathering cone pipe 521. The outer end of the inclined jet pipe 523 is mounted on the inner end of the air-gathering cone pipe 521. The top of the adjusting cylinder 524 is rotated and installed in the merging turntable. The output shaft at the bottom of the merging adjusting cylinder 524 abuts against the outer wall of the semi-circular arc plate 522. The two sides of the intermediate partition plate 531 are respectively installed on the inner walls of the inclined jet pipe 523. The two ends of the intermediate partition plate 531 are respectively installed in the middle of the gas-gathering cone pipe 521. The tops of the two gas equalization turntables 532 are respectively installed at the bottom of the inner ends of the two gas-gathering cone pipes 521. The two ends of the gas equalization roller 533 are respectively rotated and installed at the bottom of the two gas equalization turntables 532.

[0042] This invention can achieve: 1. This project enables real-time dynamic monitoring of solid waste composition, timely detection of any abnormalities in the solid waste to be mixed, and rapid triggering of alarms. Based on real-time monitoring data, it automatically adjusts the conveying capacity of the mixing conveyor, dynamically adjusting the ratio of cement clinker, solid waste, and activator, achieving rapid response and adaptation to fluctuations in raw material composition, ensuring uniform mixing and stable performance of cementitious materials, and improving the level of intelligence in the production process. In addition, it can treat the cementitious waste gas generated during the drying and dehydration process through multi-stage airflow aggregation, collision agglomeration, and uniform airflow treatment, improving dust collection efficiency. Subsequently, it is effectively filtered through dust filter bags, and finally, the exhaust gas enters the wet desulfurization tower and adsorption bed to complete the desulfurization and heavy metal vapor adsorption treatment, significantly reducing the emission of harmful substances in the exhaust gas, achieving efficient purification of the exhaust gas, and protecting the environment.

[0043] 2. This design can automatically activate the adjustment mechanism when there is a sudden surge in heavy metal concentration in the exhaust gas. By enhancing the collision and aggregation of particulate matter in the exhaust gas, dust and heavy metal particles are more likely to agglomerate into larger particles, facilitating subsequent filtration and settling, thus improving dust removal efficiency. Furthermore, the filter bag is compressed and its diameter reduced in the middle, increasing the contact area and mass transfer intensity between the airflow and the filter medium, enhancing the capture and adsorption capacity of pollutants in the exhaust gas, and improving the dust removal effect. Additionally, the inclination of the synchronous air guide plate 612 is reduced, slowing down the output flow rate of high-concentration exhaust gas and increasing the residence time of the exhaust gas in the treatment device. This ensures that the standing wave field excitation ceramic plate can effectively resonate and break up aerosol aggregates in high-concentration exhaust gas, promoting the breakage and decomposition of harmful particles, improving the depth and thoroughness of exhaust gas purification, and achieving the purpose of dynamically adjusting the airflow structure and the state of the dust removal device. This avoids insufficient exhaust gas treatment capacity leading to excessive pollutant emissions, ensuring environmental compliance and production safety.

[0044] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. Production equipment for mine backfill cementitious materials, characterized in that: The system includes a wet tailings impurity removal system, a drying and dewatering system (10), a grinding and batching system (20), and a waste gas treatment system (30). The wet tailings impurity removal system removes harmful impurities from industrial solid wastes such as tailings, slag, and coal gangue through magnetic separation, flotation, and screening to form wet tailings. The drying and dewatering system (10) includes a deep cone thickener, a high-pressure diaphragm filter press, and a rotary drying drum. The deep cone thickener, high-pressure diaphragm filter press, and rotary drying drum are all installed on the outside of the installation ground. The deep cone thickener and high-pressure diaphragm filter press are used to perform preliminary dewatering of the wet tailings, so that the moisture content of the wet tailings is <15%, and then sent to the rotary drying drum. The rotary drying drum will further dry the wet tailings after preliminary dewatering. The grinding and batching system (20) includes a liquid nitrogen-cooled mill, an XRF analyzer, a clinker conveyor, and a pipeline mixer. The liquid nitrogen-cooled mill, XRF analyzer, and proportioning conveyor are used to perform preliminary dewatering of the wet tailings. The conveyors are all installed at one end inside the installation ground. The liquid nitrogen-cooled mill grinds the wet tailings after re-drying at low temperature to form solid waste to be mixed and inputs the solid waste to be mixed into the pipeline mixer. The XRF analyzer will continuously analyze the solid waste to be mixed and send the signal to the feeding conveyor. The clinker conveyor is used to deliver cement clinker and activator to the pipeline mixer in real time according to the real-time analysis data of the XRF analyzer. The exhaust gas treatment system (30) includes a dust collector (31), a wet desulfurization tower and an adsorption bed. The dust collector (31), the wet desulfurization tower and the adsorption bed are all installed at the end of the installation ground away from the grinding and batching system (20). The dust collector (31) cools and removes dust from the tail gas generated by the drying and dehydration system (10) to form pre-treated tail gas. The wet desulfurization tower and the adsorption bed will desulfurize and adsorb heavy metal vapors on the pre-treated tail gas.

2. The production equipment for mine backfill cementitious materials according to claim 1, characterized in that: The dust collector cooler (31) includes a dust collector housing assembly (40), an air inlet regulating assembly (50), a bag assembly (60), and a dust collector outlet pipe (70). The dust collector housing assembly (40) includes a raised base frame (41), a dust collector intermediate shell (42), an air distribution inner shell (43), and an air outlet outer shell (44). The bottom of the raised base frame (41) is installed on the inner side of the installation ground, away from the grinding and batching system (20). The dust collector intermediate shell (42) is hollow inside, forming a hollow cavity. The body (421), the bottom of the dust removal intermediate shell (42) is installed on the top of the raised base frame (41), the outer side of the air distribution inner shell (43) is installed on the inner side of the dust removal intermediate shell (42), the outer side of the air outlet shell (44) is installed on the inner side of the air outlet shell (44), the bottom of the air intake adjustment component (50) is installed on the top of the dust removal intermediate shell (42), the bag assembly (60) is installed in the hollow cavity (421), and the dust removal outlet pipe (70) is installed on the bottom of the outer side of the air outlet shell (44).

3. The production equipment for mine backfill cementitious materials according to claim 2, characterized in that: The hollow cavity (421) has multiple vertical grooves (422) recessed along its length on both sides. Each vertical groove (422) has a vertical gradient rod (423) sliding at both ends. Each vertical gradient rod (423) has a vertical adjustment cylinder at its top. Multiple bag pivots (424) are spaced apart along the height between two vertical gradient rods (423). Each bag pivot (424) has a rotating mounting plate (420) rotatably mounted in the middle. The side wall is recessed in the middle and has a bag installation hole (46). The top of the hollow cavity (421) is recessed along the length direction and has multiple air inlets (425). Each air inlet (425) is protruded with an air inlet pipe (426). The top of the inner side of the hollow cavity (421) is recessed along the height direction and has multiple connecting grooves (427). The bottom surface of the hollow cavity (421) is recessed along the length direction and has multiple dust collection grooves (428). Each dust collection groove (428) is protruded with a dust hopper (429).

4. The production equipment for mine backfill cementitious materials according to claim 3, characterized in that: The internal cavity of the air distribution shell (43) is connected to the multiple vertical grooves (422) and multiple connecting grooves (427) on the inner side of the hollow cavity (421). The internal cavity of the air outlet shell (44) is connected to the multiple vertical grooves (422) on the outer side of the hollow cavity (421). The bottom surface of the air outlet shell (44) is recessed with multiple air outlet holes (441), and each air outlet hole (441) is protruded with an air outlet pipe (442).

5. The production equipment for mine backfill cementitious materials according to claim 4, characterized in that: The top of the dust removal outlet pipe (70) is connected to multiple air outlet pipes (442). An air outlet groove (71) is protruding on the outside of the dust removal outlet pipe (70). Multiple back-blowing nozzles (443) are spaced along the length direction on the outside of the air outlet shell (44). Multiple back-blowing nozzles (444) are spaced along the height direction at both ends of each back-blowing nozzle (443). The inner side of each back-blowing nozzle (444) is inserted into the internal cavity of the air outlet shell (44).

6. The production equipment for mine backfill cementitious materials according to claim 5, characterized in that: Each bag assembly (60) includes multiple bag elements (61), which are respectively mounted on bag shafts (424) of multiple vertical slots (422). Each bag element (61) includes an extrusion strip assembly (611), a synchronous air guiding arc plate (612), and multiple bag elastic sleeves (613). The top of the extrusion strip assembly (611) is mounted on the middle of the top surface of the hollow cavity (421), and the two sides of the synchronous air guiding arc plate (612) are respectively mounted on the hollow cavity (421). The top of the two mounting plates (420) are connected, and the top surface of the synchronous air guide arc plate (612) is recessed with a preset through groove (614). The bottom of the extrusion strip group (611) passes through the preset through groove (614) and is connected to the bottom surface of the hollow cavity (421). Multiple bag elastic sleeves (613) are installed on the bag mounting holes (46) of multiple mounting plates (420) along the height direction on both sides. Each bag elastic sleeve (613) is fitted with a dust filter bag tube.

7. The production equipment for mine backfill cementitious materials according to claim 6, characterized in that: Each extrusion strip group (611) includes two symmetrically arranged corrugated extrusion strips (615) and two end crossbars (616). The tops of the two corrugated extrusion strips (615) are installed in the middle of the top surface of the hollow cavity (421), the bottoms of the two corrugated extrusion strips (615) are respectively installed in the middle of the bottom surface of the hollow cavity (421), and the two ends of the two end crossbars (616) are respectively installed at the top and bottom of the two corrugated extrusion strips (615).

8. The production equipment for mine backfill cementitious materials according to claim 7, characterized in that: The intake regulating assembly (50) includes an intake pipe (51), two opposing coalescing elements (52) and an equalizing element (53). The bottom of the intake pipe (51) is installed on the top of multiple intake pipes (426). The intake pipe (51) is provided with an intake guide bend (511) at both ends. The top surface of the intake pipe (51) is provided with a coalescing turntable at both ends. The two opposing coalescing elements (52) are installed at both ends of the intake pipe (51) and are symmetrically arranged between the two opposing coalescing elements (52). The equalizing element (53) is installed inside the intake pipe (51) and in the two opposing coalescing elements (52).

9. The production equipment for mine backfill cementitious materials according to claim 8, characterized in that: Each counter-flush element (52) includes a gas-gathering cone tube (521), a semi-circular arc plate (522), an inclined jet pipe (523), and a fusion regulating cylinder (524). The outer end of the gas-gathering cone tube (521) is installed on one end of the inner wall of the air inlet pipe (51). The outer end of the semi-circular arc plate (522) is installed on the top of the inner end of the gas-gathering cone tube (521). The outer end of the inclined jet pipe (523) is installed on the inner end of the gas-gathering cone tube (521). The top of the fusion regulating cylinder (524) is rotatably installed in the fusion turntable. The output shaft at the bottom of the fusion regulating cylinder (524) abuts against the outer wall of the semi-circular arc plate (522).

10. The production equipment for mine backfill cementitious materials according to claim 9, characterized in that: The gas equalization element (53) includes a middle partition plate (531), two gas equalization rotating platforms (532) and a gas equalization roller (533). The middle partition plate (531) is installed on both sides of the inner wall of the inclined jet pipe (523). The two ends of the middle partition plate (531) are installed in the middle of the gas gathering cone pipe (521). The middle part of the top surface of the middle partition plate (531) is recessed with an air curtain groove (534). The tops of the two gas equalization rotating platforms (532) are installed at the bottom of the inner end of the two gas gathering cone pipes (521). The two ends of the gas equalization roller (533) are rotatably installed at the bottom of the two gas equalization rotating platforms (532).

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