A heavy metal solidification test device for fly ash-based polymers

Abstract

The invention relates to a heavy metal solidification testing device for fly ash-based polymers, aiming to solve the technical problem of low efficiency in testing the heavy metal solidification rate of fly ash-based polymers in roadbed filling. The device comprises a base platform. A belt conveyor is arranged on the base platform to convey pretreated fly ash. A drying mechanism is arranged on the belt conveyor to dry the fly ash. The fly ash is then transported to a mixing and stirring mechanism through a conveying pipe to be fully mixed and stirred with an alkali activator to form a geopolymer. The geopolymer is then transported to the inside of a flipping oscillation mechanism through a connecting pipe to be fused with an extractant in a wide-mouthed test bottle. The device can realize an automated and continuous testing process, thereby greatly improving the testing efficiency. Compared with small-scale tests in laboratories, the device can process more samples in a shorter time, greatly shortening the testing cycle, which is conducive to meeting the testing needs of roadbed filling geopolymers in road engineering.

Description

Technical Field

[0001] The invention relates to the technical field of solidification testing, in particular to a heavy metal solidification testing device for fly ash-based polymers. Background Art

[0002] At present, the output of urban domestic waste in my country is increasing rapidly, and the incineration method of domestic waste is increasingly widely used in my country because of its characteristics of high temperature sterilization, stable residue, significant volume reduction and energy recovery. However, a large amount of fly ash will be produced during the incineration of domestic waste. The amount of fly ash in fluidized bed incinerators is 15% to 20% of the incineration amount, and the amount of fly ash in grate furnaces is 3% to 5% of the incineration amount. At the same time, fly ash is enriched with a large amount of heavy metals and dioxins, which can cause harm to human health and the ecological environment, and has been included in the list of hazardous wastes in my country. At present, the research and development and application of fly ash harmless and resource-based comprehensive treatment technology are very urgent. Geopolymers, as a new type of inorganic polymer material, have excellent physical and chemical properties, and can effectively react chemically with heavy metals and other harmful substances in fly ash to form a stable solidified body, thereby realizing the harmless treatment of fly ash. By mixing geopolymers with fly ash, the modification of fly ash can be achieved. This helps to reduce the environmental risks of fly ash during disposal and utilization, and expand its scope of application.

[0003] For example, the Chinese invention patent with publication number CN116003009B discloses a fly ash-based polymer for roadbed improvement layer and its preparation method. The invention converts harmful fly ash and tailings into building materials by mixing with an alkali activator, and uses fly ash as raw material to prepare geopolymer, which is then applied to road engineering. Whether the mechanical strength, water stability and water pollution degree of the geopolymer prepared by this method meet the technical requirements of roadbed filling, the degree of solidification of heavy metals in fly ash is unknown, and whether it can meet the solidification standard is also an unknown. If the heavy metals are not effectively solidified, they may be gradually released into the environment during rain erosion or roadbed use, causing pollution to the soil, water and atmosphere. Heavy metals may enter organisms through the food chain, posing a potential threat to the ecosystem and human health. The presence of heavy metals may also affect the stability and durability of the geopolymer, resulting in a decrease in the physical properties of the roadbed, such as a decrease in compressive strength and hardness, which may make the roadbed unable to meet the design requirements in terms of bearing capacity and service life.

[0004] However, the current heavy metal solidification test of fly ash-based polymers is basically a small-scale test conducted in the laboratory, which cannot meet the large-scale testing needs of roadbed filling in road engineering. Therefore, how to design a heavy metal solidification test device for fly ash-based polymers is particularly important. In view of this, we propose a heavy metal solidification test device for fly ash-based polymers. Summary of the invention

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, meet the actual needs, and provide a heavy metal solidification test device for fly ash-based polymers to solve the technical problem of low efficiency in heavy metal solidification rate testing when fly ash-based polymers are currently used in roadbed filling.

[0006] In order to achieve the purpose of the present invention, the technical scheme adopted by the present invention is as follows: a heavy metal solidification test device for fly ash-based polymers is designed, including a base, a belt conveyor is provided on the base, a drying mechanism is provided on the top of the belt conveyor, a conveying pipe is provided at the output end of the belt conveyor, a mixing and stirring mechanism is connected to the output end of the conveying pipe, a connecting pipe is connected to the output end of the mixing and stirring mechanism, a flipping and oscillating mechanism is connected to the output end of the connecting pipe, and a flipping and oscillating mechanism is detachably connected to a plurality of wide-mouthed test bottles; the flipping and oscillating mechanism includes a bearing component, a flipping component, an intermittent component, a mounting component, a closing component and a starting component, the bearing component is arranged on the side of the mixing and stirring mechanism away from the drying mechanism, the flipping component is connected to the bearing component, the intermittent component is sleeved on the flipping component, one end of the mounting component is connected to the output end of the connecting pipe, the other end of the mounting component is connected to the top of the bearing component, the closing component is movably arranged on the flipping component, and the starting component is connected to the mounting component and the closing component.

[0007] Preferably, the supporting component includes a supporting side panel, a supporting shell, a flipping cavity, a picking port and a sliding door, the supporting side panel is symmetrically arranged on the side of the mixing and stirring mechanism away from the drying mechanism, the supporting shell is connected to the supporting side panel, the flipping cavity is opened inside the supporting shell, the picking port is opened on the side of the supporting shell away from the mixing and stirring mechanism, the sliding door is slidably connected to the inner wall of the supporting shell at a position relative to the picking port, the flipping component is arranged inside the flipping cavity, the intermittent component is connected to a position between the supporting shell and the supporting side panel, and the mounting component is arranged at the top of the supporting shell.

[0008] Preferably, the flipping assembly includes a reduction motor, a rotating shaft, a flipping box, a limiting ring and a mounting hole, the reduction motor is connected to the supporting side plate, one end of the rotating shaft is connected to the output end of the reduction motor, the other end of the rotating shaft is rotatably penetrated through the bearing shell, the flipping box is sleeved on the rotating shaft at a position relative to the flipping cavity, a number of limiting rings are arranged at the bottom end of the flipping box, a number of mounting holes are opened at the top of the flipping box, a number of wide-mouth test bottles are arranged on the limiting ring, and the closing assembly is movably arranged on the mounting hole.

[0009] Preferably, the intermittent component includes a mounting ring body, a mounting groove, a spring, a positioning block, a rotating disk, a positioning groove, a rotating rod, a connecting block and a tension spring. The mounting ring body is arranged at a position between the bearing shell and the supporting side plate. The mounting groove is arranged on the mounting ring body in a ring shape with equal intervals. A plurality of springs are arranged on the mounting groove. The positioning block is connected to one end of the spring away from the mounting groove. The rotating disk is sleeved on one end of the rotating shaft rod. The positioning groove is opened on the outer wall of the rotating disk in a ring shape with equal intervals. The positioning block is adapted to the shape of the positioning groove. The rotating rod is sleeved on the rotating shaft rod at a position relative to the rotating disk. The connecting block is connected to the rotating disk and the rotating rod, and the tension spring is connected to the two connecting blocks.

[0010] Preferably, the positioning block is provided with an inclined surface A at one end away from the spring, and the rotating rod is provided with an inclined surface B at one end away from the rotating shaft rod, and the inclined surface A is adapted to the inclined surface B.

[0011] Preferably, the mounting assembly includes a mounting plate, a cylinder group, an insertion hole, a rotating cylinder, a limiting rod, a curved groove and a connecting tube A, the mounting plate is arranged at the top of the bearing shell, the cylinder group is arranged at the top of the mounting plate, the insertion hole is opened on the mounting plate, the rotating cylinder is connected to the output end of the cylinder group and is movably inserted in the insertion hole, the limiting rod is arranged on the insertion hole, the curved groove is opened on the outer wall of the rotating cylinder, the limiting rod is adapted to the size of the curved groove, and the connecting tube A is connected to the bottom end of the rotating cylinder relative to the position above the closing assembly.

[0012] Preferably, the closing component includes a connecting tube B, a top plate, a slide groove, a slider, a bottom plate, a long hole, a through hole, a connecting cover and an internal thread. The connecting cover is arranged on the mounting hole, the internal thread is opened on the connecting cover, the bottom plate is arranged at the top of the connecting cover, the through hole is opened on the bottom plate, the long holes are opened in a circular shape with equal intervals on the bottom plate relative to the through hole, the bottom ends of several sliders are slidably connected to the long holes, the top plate is arranged at the top of the slider, the slide groove is opened in a circular shape with equal intervals on the bottom end of the top plate, the top end of the slider is slidably connected to the slide groove, and the connecting tube B is arranged at a position below the top end of the top plate relative to the connecting tube A.

[0013] Preferably, a rotating groove is also provided on the chassis, and the starting member is connected to the top of the top plate and movably penetrates the rotating groove; the starting member includes a suspension rod, a stop block and an offset block, the suspension rod is connected to the bottom end of the cylinder group, the stop block is connected to the bottom end of the suspension rod, and the offset block is connected to the top of the top plate and movably penetrates the rotating groove.

[0014] Preferably, the top of the wide-mouth test bottle is provided with an external thread, and the external thread is adapted to the connecting cover and the internal thread.

[0015] A method for using a heavy metal solidification test device for fly ash-based polymers comprises the following steps:

[0016] S1, conveying operation;

[0017] The pretreated fly ash is transported by a belt conveyor;

[0018] S2, drying operation;

[0019] The pre-treated fly ash is transported by a belt conveyor and then passes through a drying mechanism, where the fly ash is dried to remove excess moisture;

[0020] S3, mixing and stirring operation;

[0021] The dried fly ash is transported to the mixing and stirring mechanism through a conveying pipe, and is fully blended and stirred with the alkali activator inside the mixing and stirring mechanism to form a geopolymer;

[0022] S4, extraction operation;

[0023] After adding the extractant into the wide-mouth test bottle, install it on the flip oscillation mechanism, and the geopolymer is transported to the rotating cylinder through the connecting pipe. The stroke of the cylinder group causes the rotating cylinder to press down inside the insertion hole, and the limit rod on the insertion hole slides in the curved groove of the rotating cylinder, so that the rotating cylinder rotates, and the rotating cylinder drives the connecting cylinder A to rotate into the connecting cylinder B. The connecting cylinder B drives the internal threads of the top plate, the bottom plate and the connecting cover to rotate and connect with the wide-mouth test bottle, and the geopolymer flows into the wide-mouth test bottle;

[0024] The cylinder group is pressed down, and at the same time, the suspension rod and the stop block of the starter are pressed down. The stop block and the offset block at the top of the top plate and movably arranged on the rotating groove are squeezed against each other, so that the offset block slides on the rotating groove, and the offset block drives the top plate to rotate. The rotation of the top plate drives the slider to slide on the slide groove and the long hole to close the through hole.

[0025] The cylinder group returns, driving the reduction motor to drive the rotating shaft to rotate, and the rotating shaft drives the rotating rod to rotate. The inclined surface B of the rotating rod contacts the inclined surface A of the positioning block, and the extrusion spring causes the positioning block to retract. The positioning block retracts out of the positioning groove, and the tension spring on the rotating rod pulls the connecting block and the rotating disk to realize rapid intermittent rotation, so that the geopolymer in the wide-mouth test bottle is fused with the leaching agent to extract the heavy metals;

[0026] S5, measurement operation;

[0027] The heavy metal content in the leaching agent was determined and compared with the heavy metal content in the original fly ash sample to evaluate the solidification effect of the geopolymer on heavy metals.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention improves the structure of the existing heavy metal solidification test device for fly ash-based polymers, arranges a belt conveyor on the base, uses the belt conveyor to transport pretreated fly ash, and arranges a drying mechanism on the belt conveyor to dry the fly ash, and then transports the fly ash to a mixing and stirring mechanism through a conveying pipe to be fully mixed and stirred with an alkali activator to form a geopolymer, and the geopolymer is then transported to the inside of a flipping and oscillating mechanism through a connecting pipe to be fused with an extractant in a wide-mouthed test bottle, so that the present invention can realize an automated and continuous test process, thereby greatly improving the test efficiency. Compared with small-scale tests in laboratories, it can process more samples in a shorter time, greatly shortening the test cycle, which is conducive to meeting the detection needs of roadbed filling geopolymers in road engineering.

[0030] 2. The present invention arranges a reduction motor on the supporting side plate to drive the reduction motor to rotate the rotating shaft rod, and the rotating shaft rod drives the flip box to rotate inside the flip chamber. The limiting ring and the mounting hole on the flip box are used to fix the wide-mouth test bottle. The flip box is provided with a plurality of limiting rings and mounting holes, so that the flip assembly can perform heavy metal solidification detection on multiple batches of fly ash geopolymers at the same time, which greatly shortens the test time of a single sample, which helps to accelerate the research progress of fly ash heavy metal solidification technology and improve the overall test efficiency.

[0031] 3. The present invention sets a mounting ring at a position between the bearing shell and the supporting side plate. When the reduction motor drives the rotating shaft to rotate, the rotating shaft drives the rotating rod to rotate, and the inclined surface B of the rotating rod contacts the inclined surface A of the positioning block. The extrusion spring causes the positioning block to retract. When the positioning block retracts out of the positioning groove, the tension spring on the rotating rod pulls the connecting block and the rotating disk to achieve rapid rotation until the positioning block is stuck in the next positioning groove, so that the test sample can be quickly flipped in a short time, so that the fly ash geopolymer and the heavy metal are fully mixed, thereby improving the uniformity of mixing. Compared with the conventional flipping method, the present invention can more effectively break the agglomeration and stratification between materials, ensure that the heavy metals are evenly distributed in the fly ash geopolymer, and help improve the leaching efficiency.

[0032] 4. The present invention arranges a mounting plate on the top of the bearing shell, and a cylinder group is arranged on the mounting plate. The local polymer is transported to the rotating cylinder through the connecting pipe, and the cylinder group drives the rotating cylinder to press down inside the insertion hole. The limiting rod on the insertion hole slides in the curved groove of the rotating cylinder, so that the rotating cylinder rotates, and the rotating cylinder drives the connecting cylinder A to rotate into the closing component, so that the local polymer enters the wide-mouth test bottle through the closing component, without manual intervention, which greatly simplifies the operation steps, reduces the complexity of the operation, and improves the efficiency of the test work.

[0033] 5. The present invention opens a rotating groove on the chassis, and when the local polymer enters the wide-mouth test bottle, the cylinder group is pressed down and drives the suspension rod and the stop block of the starter to be pressed down. The stop block and the offset block at the top of the top plate and movably arranged on the rotating groove squeeze each other, so that the offset block slides on the rotating groove, and the offset block drives the top plate to rotate. The rotation of the top plate drives the slider to slide on the slide groove and the long hole to close the through hole. The fully automatic sealing method makes the present invention have good sealing performance, which can effectively prevent harmful substances from leaking into the environment, thereby reducing the risk of environmental pollution. It is helpful to promote green production and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall front structure of the present invention;

[0035] Figure 2 It is a schematic diagram of the overall back structure of the present invention;

[0036] Figure 3 It is a front view structural schematic diagram of the present invention;

[0037] Figure 4 It is a schematic diagram of the structure of the flip oscillation mechanism and the connecting pipe part in the present invention;

[0038] Figure 5 It is a schematic diagram of the structure of the bearing assembly, the flip assembly and the intermittent assembly in the present invention;

[0039] Figure 6 It is a partial cross-sectional view and a schematic diagram of the disassembled structure of the intermittent component in the present invention;

[0040] Figure 7 It is a front view structural schematic diagram of the intermittent component in the present invention;

[0041] Figure 8 It is a schematic diagram of the structure of the bearing assembly, the flip assembly, the installation assembly and the closing assembly in the present invention;

[0042] Fig. 9 It is a schematic diagram of the structure of the connecting pipe, the mounting assembly, the closing assembly, the starting member and the wide-mouth test bottle in the present invention;

[0043] Fig.10 It is a schematic diagram of the structure of the installation component, the closing component, the starting member and the wide-mouth test bottle in the present invention;

[0044] Fig.11 This is a schematic diagram of the split top surface structure of the closed component in the present invention;

[0045] Fig.12 This is a schematic diagram of the bottom structure of the closed component in the present invention;

[0046] In the figure: 1, base; 2, belt conveyor; 3, drying mechanism; 4, conveying pipe; 5, mixing and stirring mechanism; 6, connecting pipe; 7, flipping and oscillating mechanism; 8, wide-mouth test bottle;

[0047] 701, bearing assembly; 702, flip assembly; 703, intermittent assembly; 704, installation assembly; 705, closing assembly; 706, starting member; 707, inclined plane A; 708, inclined plane B; 709, rotating groove;

[0048] 801, external thread;

[0049] 7011, supporting side plate; 7012, bearing shell; 7013, turning cavity; 7014, taking port; 7015, sliding door;

[0050] 7021, reduction motor; 7022, rotating shaft; 7023, flip box; 7024, limit ring; 7025, mounting hole;

[0051] 7031, mounting ring; 7032, mounting groove; 7033, spring; 7034, positioning block; 7035, rotating disk; 7036, positioning groove; 7037, rotating rod; 7038, connecting block; 7039, tension spring;

[0052] 7041, mounting plate; 7042, cylinder group; 7043, insertion hole; 7044, rotating cylinder; 7045, limiting rod; 7046, curved groove; 7047, connecting cylinder A;

[0053] 7051, connecting tube B; 7052, top plate; 7053, slide groove; 7054, slider; 7055, bottom plate; 7056, long hole; 7057, through hole; 7058, connecting cover; 7059, internal thread;

[0054] 7061, suspension rod; 7062, stop block; 7063, offset block. DETAILED DESCRIPTION

[0055] The present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0056] Example 1: A heavy metal solidification test device for fly ash-based polymers, see Figures 1 to 12, including a base 1, a belt conveyor 2 is provided on the base 1, a drying mechanism 3 is provided on the top of the belt conveyor 2, a conveying pipe 4 is provided at the output end of the belt conveyor 2, a mixing and stirring mechanism 5 is connected to the output end of the conveying pipe 4, a connecting pipe 6 is connected to the output end of the mixing and stirring mechanism 5, a flipping and oscillating mechanism 7 is connected to the output end of the connecting pipe 6, and a plurality of wide-mouthed test bottles 8 are detachably connected to the flipping and oscillating mechanism 7; the flipping and oscillating mechanism 7 includes a bearing component 701, a flipping component 702, an intermittent component 703, a mounting component 704, a closing component 705 and a starting member 706, the bearing component 701 is arranged on the side of the mixing and stirring mechanism 5 away from the drying mechanism 3, the flipping component 702 is connected to the bearing component 701, the intermittent component 703 is sleeved on the flipping component 702, one end of the mounting component 704 is connected to the output end of the connecting pipe 6, and the other end of the mounting component 704 is connected to the top of the bearing component 701, the closing component 705 is movably arranged on the flipping component 702, and the starting member 706 is connected to the mounting component 704 and the closing component 705. The present invention improves the structure of the existing heavy metal solidification test device for fly ash-based polymers. A belt conveyor 2 is arranged on a base 1, and the pretreated fly ash is conveyed by the belt conveyor 2. A drying mechanism 3 is arranged on the belt conveyor 2 to dry the fly ash, and then the fly ash is conveyed to a mixing and stirring mechanism 5 through a conveying pipe 4 to be fully mixed and stirred with an alkali activator to form a geopolymer. The geopolymer is then conveyed to the inside of a flipping and oscillating mechanism 7 through a connecting pipe 6 to be fused with an extractant in a wide-mouthed test bottle 8, so that the present invention can realize an automated and continuous test process, thereby greatly improving the test efficiency. Compared with small-scale tests in laboratories, it can process more samples in a shorter time, greatly shortening the test cycle, which is conducive to meeting the detection needs of roadbed filling geopolymers in road engineering.

[0057] Specifically, the supporting component 701 includes a supporting side plate 7011, a supporting shell 7012, a flipping cavity 7013, a picking port 7014 and a sliding door 7015. The supporting side plate 7011 is symmetrically arranged on the side of the mixing and stirring mechanism 5 away from the drying mechanism 3. The supporting shell 7012 is connected to the supporting side plate 7011. The flipping cavity 7013 is opened inside the supporting shell 7012. The picking port 7014 is opened on the side of the supporting shell 7012 away from the mixing and stirring mechanism 5. The sliding door 7015 is slidably connected to the inner wall of the supporting shell 7012 at a position relative to the picking port 7014. The flipping component 702 is arranged inside the flipping cavity 7013. The intermittent component 703 is connected to a position between the supporting shell 7012 and the supporting side plate 7011. The mounting component 704 is arranged at the top of the supporting shell 7012. The present invention provides a supporting side plate 7011 on the mixing and stirring mechanism 5, and a bearing shell 7012 on the supporting side plate 7011. A flipping cavity 7013 is provided inside the bearing shell 7012. After the leaching agent is added to the wide-mouth test bottle 8, the bottle is placed in the flipping assembly 702. The flipping assembly 702 flips and oscillates inside the flipping cavity 7013, so that the leaching agent and the geopolymer are fully integrated, and the heavy metal migration process in the actual environment is simulated. The heavy metal content in the leachate is measured, and the solidification effect of the geopolymer on the heavy metals is evaluated by comparing it with the heavy metal content in the original fly ash sample.

[0058] Furthermore, the flipping assembly 702 includes a reduction motor 7021, a rotating shaft 7022, a flipping box 7023, a limit ring 7024 and a mounting hole 7025. The reduction motor 7021 is connected to the supporting side plate 7011, one end of the rotating shaft 7022 is connected to the output end of the reduction motor 7021, and the other end of the rotating shaft 7022 is rotatably penetrated through the bearing shell 7012. The flipping box 7023 is sleeved on the rotating shaft 7022 at a position relative to the flip cavity 7013, a plurality of limit rings 7024 are arranged at the bottom end of the flipping box 7023, a plurality of mounting holes 7025 are opened at the top of the flipping box 7023, a plurality of wide-mouth test bottles 8 are arranged on the limit ring 7024, and the closing assembly 705 is movably arranged on the mounting hole 7025. The present invention arranges a reduction motor 7021 on the supporting side plate 7011, drives the reduction motor 7021 to rotate the rotating shaft 7022, and the rotating shaft 7022 drives the flip box 7023 to rotate inside the flip chamber 7013. The limiting ring 7024 and the mounting hole 7025 on the flip box 7023 are used to fix the wide-mouth test bottle 8. The flip box 7023 is provided with a plurality of limiting rings 7024 and mounting holes 7025, so that the flip assembly 702 can simultaneously perform heavy metal solidification detection on multiple batches of fly ash geopolymers, which greatly shortens the test time of a single sample, which helps to accelerate the research progress of fly ash heavy metal solidification technology and improve the overall test efficiency.

[0059] Furthermore, the intermittent assembly 703 includes a mounting ring 7031, a mounting groove 7032, a spring 7033, a positioning block 7034, a rotating disk 7035, a positioning groove 7036, a rotating rod 7037, a connecting block 7038 and a tension spring 7039. The mounting ring 7031 is arranged between the bearing housing 7012 and the supporting side plate 7011, the mounting groove 7032 is arranged on the mounting ring 7031 in an annular shape and at equal intervals, a plurality of springs 7033 are arranged on the mounting groove 7032, and the positioning block 703 4 is connected to the end of the spring 7033 away from the installation groove 7032, the rotating disk 7035 is sleeved on one end of the rotating shaft 7022, the positioning grooves 7036 are arranged on the outer wall of the rotating disk 7035 in a ring shape with equal intervals, the positioning block 7034 is adapted to the shape of the positioning groove 7036, the rotating rod 7037 is sleeved on the rotating shaft 7022 at a position relative to the rotating disk 7035, the connecting block 7038 is connected to the rotating disk 7035 and the rotating rod 7037, and the tension spring 7039 is connected to the two connecting blocks 7038. The present invention sets a mounting ring 7031 at a position between the bearing shell 7012 and the supporting side plate 7011. When the reduction motor 7021 drives the rotating shaft 7022 to rotate, the rotating shaft 7022 drives the rotating rod 7037 to rotate, and the inclined surface B708 ​​of the rotating rod 7037 contacts the inclined surface A707 of the positioning block 7034. The extrusion spring 7033 causes the positioning block 7034 to retract. When the positioning block 7034 retracts out of the positioning groove 7036, the tension spring 7039 on the rotating rod 7037 pulls the connecting block 7038 and the rotating disk 7035 to achieve rapid rotation until the positioning block 7034 is stuck in the next positioning groove 7036, so that the test sample can be quickly flipped in a short time, so that the fly ash geopolymer and the heavy metal are fully mixed, thereby improving the uniformity of mixing. Compared with the conventional flipping method, the present invention can more effectively break the agglomeration and stratification between materials, ensure that the heavy metals are evenly distributed in the fly ash geopolymer, and is conducive to improving the leaching efficiency.

[0060] It is worth noting that a slope A707 is provided at one end of the positioning block 7034 away from the spring 7033 , and a slope B708 ​​is provided at one end of the rotating rod 7037 away from the rotating shaft rod 7022 , and the slope A707 is adapted to the slope B708 ​​. The present invention provides an inclined surface A707 at one end of the positioning block 7034 and an inclined surface B708 ​​at one end of the rotating rod 7037. When the reduction motor 7021 drives the rotating shaft 7022 to rotate, the rotating shaft 7022 drives the rotating rod 7037 to rotate, and the inclined surface B708 ​​of the rotating rod 7037 contacts the inclined surface A707 of the positioning block 7034. The extrusion spring 7033 causes the positioning block 7034 to retract. When the positioning block 7034 retracts out of the positioning groove 7036, the tension spring 7039 on the rotating rod 7037 pulls the connecting block 7038 and the rotating disk 7035 to achieve rapid rotation, thereby promoting contact and reaction between the fly ash geopolymer and the leaching agent, which helps to accelerate the test process and improve the test efficiency.

[0061] It is worth noting that the mounting assembly 704 includes a mounting plate 7041, a cylinder group 7042, an insertion hole 7043, a rotating cylinder 7044, a limiting rod 7045, a curved groove 7046 and a connecting cylinder A7047. The mounting plate 7041 is arranged at the top of the bearing shell 7012, the cylinder group 7042 is arranged at the top of the mounting plate 7041, the insertion hole 7043 is opened on the mounting plate 7041, the rotating cylinder 7044 is connected to the output end of the cylinder group 7042 and is movably inserted in the insertion hole 7043, the limiting rod 7045 is arranged on the insertion hole 7043, the curved groove 7046 is opened on the outer wall of the rotating cylinder 7044, the limiting rod 7045 is adapted in size to the curved groove 7046, and the connecting cylinder A7047 is connected to the bottom end of the rotating cylinder 7044 relative to the position above the closing assembly 705. The present invention sets a mounting plate 7041 on the top of the bearing shell 7012, and a cylinder group 7042 is set on the mounting plate 7041. The local polymer is transported to the rotating cylinder 7044 through the connecting pipe 6, and the cylinder group 7042 drives the rotating cylinder 7044 to press down inside the insertion hole 7043. The limiting rod 7045 on the insertion hole 7043 slides in the curved groove 7046 of the rotating cylinder 7044, so that the rotating cylinder 7044 rotates, and the rotating cylinder 7044 drives the connecting cylinder A7047 to rotate into the closing component 705, so that the local polymer enters the wide-mouthed test bottle 8 through the closing component 705, without manual intervention, which greatly simplifies the operation steps, reduces the complexity of the operation, and improves the efficiency of the test work.

[0062] It is worth mentioning that the closing assembly 705 includes a connecting tube B7051, a top plate 7052, a slide groove 7053, a slider 7054, a bottom plate 7055, a long hole 7056, a through hole 7057, a connecting cover 7058 and an internal thread 7059. The connecting cover 7058 is arranged on the mounting hole 7025, the internal thread 7059 is provided on the connecting cover 7058, the bottom plate 7055 is arranged on the top of the connecting cover 7058, and the through hole 7057 is provided on the bottom plate 7055. Long holes 7056 are arranged in a circular shape at equal intervals on the bottom plate 7055 relative to the through holes 7057, a plurality of sliders 7054 are slidably connected to the long holes 7056 at their bottom ends, a top plate 7052 is arranged at the top end of the sliders 7054, a slide groove 7053 is arranged in a circular shape at equal intervals on the bottom end of the top plate 7052, the top end of the sliders 7054 is slidably connected to the slide groove 7053, and a connecting tube B7051 is arranged at a position below the top end of the top plate 7052 relative to the connecting tube A7047. The present invention arranges a connecting cover 7058 on the mounting hole 7025, and the local polymer is transported to the rotating cylinder 7044 through the connecting pipe 6. The cylinder group 7042 drives the rotating cylinder 7044 to press down inside the insertion hole 7043. The limiting rod 7045 on the insertion hole 7043 slides in the curved groove 7046 of the rotating cylinder 7044, so that the rotating cylinder 7044 rotates. The rotating cylinder 7044 drives the connecting cylinder A 7047 to rotate into the connecting cylinder B 7051. The connecting cylinder B 7051 drives the top plate 7052, the bottom plate 7055 and the internal thread 7059 of the connecting cover 7058 to rotate and connect with the wide-mouth test bottle 8, which can ensure that the wide-mouth test bottle 8 has good sealing performance after being capped, prevents the leakage or volatilization of fly ash local polymer and heavy metals during the test, and ensures the accuracy and reliability of the test results.

[0063] It is worth emphasizing that a rotating groove 709 is also provided on the chassis 7055, and the starting member 706 is connected to the top of the top plate 7052 and movably penetrates the rotating groove 709; the starting member 706 includes a suspension rod 7061, a stop block 7062 and an offset block 7063, the suspension rod 7061 is connected to the bottom end of the cylinder group 7042, the stop block 7062 is connected to the bottom end of the suspension rod 7061, and the offset block 7063 is connected to the top of the top plate 7052 and movably penetrates the rotating groove 709. The present invention provides a rotating groove 709 on the bottom plate 7055, and the local polymer enters the wide-mouth test bottle 8. The cylinder group 7042 is pressed down and drives the suspension rod 7061 and the stop block 7062 of the starter 706 to be pressed down. The stop block 7062 and the offset block 7063 at the top of the top plate 7052 and movably arranged on the rotating groove 709 squeeze each other, so that the offset block 7063 slides on the rotating groove 709, and the offset block 7063 drives the top plate 7052 to rotate. The top plate 7052 rotates and drives the slider 7054 to slide on the slide groove 7053 and the long hole 7056 to close the through hole 7057. The fully automatic sealing method makes the present invention have good sealing performance, can effectively prevent harmful substances from leaking into the environment, and thus reduce the risk of environmental pollution. It is helpful to promote green production and sustainable development.

[0064] In addition, the top of the wide-mouth test bottle 8 is provided with an external thread 801, which is matched with the connection cover 7058 and the internal thread 7059. In the present invention, the external thread 801 of the wide-mouth test bottle 8 is matched with the internal thread 7059 on the connection cover 7058, so that the capping conditions and states of each test can be ensured to be consistent, thereby eliminating the differences in test conditions caused by human factors, helping to improve the comparability and repeatability of test data, and providing a more reliable basis for scientific research and practical applications.

[0065] Example 2: A method for using a heavy metal solidification test device for fly ash-based polymers, comprising the following steps:

[0066] S1, conveying operation;

[0067] The pretreated fly ash is transported via a belt conveyor 2;

[0068] S2, drying operation;

[0069] The pre-treated fly ash is conveyed by the belt conveyor 2 and passes through the drying mechanism 3, where the fly ash is dried to remove excess moisture;

[0070] S3, mixing and stirring operation;

[0071] The dried fly ash is transported to the mixing and stirring mechanism 5 through the transport pipe 4, and is fully blended and stirred with the alkali activator inside the mixing and stirring mechanism 5 to form a geopolymer;

[0072] S4, extraction operation;

[0073] After adding the extractant into the wide-mouth test bottle 8, it is installed on the flip oscillation mechanism 7. The geopolymer is transported to the rotating cylinder 7044 through the connecting pipe 6. The stroke of the cylinder group 7042 causes the rotating cylinder 7044 to be pressed down inside the insertion hole 7043. The limiting rod 7045 on the insertion hole 7043 slides in the curved groove 7046 of the rotating cylinder 7044, so that the rotating cylinder 7044 rotates. The rotating cylinder 7044 drives the connecting cylinder A 7047 to rotate into the connecting cylinder B 7051. The connecting cylinder B 7051 drives the top plate 7052, the bottom plate 7055 and the internal thread 7059 of the connecting cover 7058 to rotate and connect with the wide-mouth test bottle 8. The geopolymer flows into the wide-mouth test bottle 8.

[0074] The cylinder group 7042 is pressed down and at the same time drives the suspension rod 7061 and the stop block 7062 of the starter 706 to be pressed down. The stop block 7062 and the offset block 7063 at the top of the top plate 7052 and movably arranged on the rotation groove 709 are pressed against each other, so that the offset block 7063 slides on the rotation groove 709. The offset block 7063 drives the top plate 7052 to rotate. The rotation of the top plate 7052 drives the slider 7054 to slide on the slide groove 7053 and the long hole 7056 to close the through hole 7057.

[0075] The cylinder group 7042 returns, driving the reduction motor 7021 to drive the rotating shaft 7022 to rotate, and the rotating shaft 7022 drives the rotating rod 7037 to rotate, and the inclined surface B708 ​​of the rotating rod 7037 contacts the inclined surface A707 of the positioning block 7034, and the extrusion spring 7033 causes the positioning block 7034 to retract, and the positioning block 7034 retracts out of the positioning groove 7036, and the tension spring 7039 on the rotating rod 7037 pulls the connecting block 7038 and the rotating disk 7035 to realize rapid intermittent rotation, so that the geopolymer in the wide-mouth test bottle 8 is fused with the leaching agent to extract the heavy metals;

[0076] S5, measurement operation;

[0077] The heavy metal content in the leaching agent was determined and compared with the heavy metal content in the original fly ash sample to evaluate the solidification effect of the geopolymer on heavy metals.

[0078] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A heavy metal solidification test device for fly ash-based polymers, characterized in that: The invention comprises a base (1), a belt conveyor (2) is provided on the base (1), a drying mechanism (3) is provided at the top of the belt conveyor (2), a conveying pipe (4) is provided at the output end of the belt conveyor (2), a mixing and stirring mechanism (5) is connected to the output end of the conveying pipe (4), a connecting pipe (6) is connected to the output end of the mixing and stirring mechanism (5), a turning and oscillating mechanism (7) is connected to the output end of the connecting pipe (6), and a plurality of wide-mouthed test bottles (8) are detachably connected to the turning and oscillating mechanism (7); The overturning and oscillating mechanism (7) comprises a bearing component (701), an overturning component (702), an intermittent component (703), a mounting component (704), a closing component (705) and a starting component (706); the bearing component (701) is arranged on a side of the mixing and stirring mechanism (5) away from the drying mechanism (3); the overturning component (702) is connected to the bearing component (701); the intermittent component (703) is sleeved on the overturning component (702); one end of the mounting component (704) is connected to the output end of the connecting pipe (6); the other end of the mounting component (704) is connected to the top end of the bearing component (701); the closing component (705) is movably arranged on the overturning component (702); and the starting component (706) is connected to the mounting component (704) and the closing component (705); The bearing assembly (701) comprises a supporting side plate (7011), a bearing shell (7012), a turnover cavity (7013), a taking-out opening (7014) and a sliding door (7015); the supporting side plate (7011) is symmetrically arranged on a side of the mixing and stirring mechanism (5) away from the drying mechanism (3); the bearing shell (7012) is connected to the supporting side plate (7011); the turnover cavity (7013) is arranged inside the bearing shell (7012); the taking-out opening (7014) is arranged On the side of the bearing shell (7012) away from the mixing and stirring mechanism (5), the sliding door (7015) is slidably connected to a position on the inner wall of the bearing shell (7012) relative to the taking port (7014), the turnover component (702) is arranged inside the turnover cavity (7013), the intermittent component (703) is connected to a position between the bearing shell (7012) and the supporting side plate (7011), and the mounting component (704) is arranged at the top of the bearing shell (7012); The flip assembly (702) comprises a reduction motor (7021), a rotating shaft (7022), a flip box (7023), a limit ring (7024) and a mounting hole (7025); the reduction motor (7021) is connected to the supporting side plate (7011); one end of the rotating shaft (7022) is connected to the output end of the reduction motor (7021); the other end of the rotating shaft (7022) is rotatably disposed on the bearing shell (7012); The flip box (7023) is sleeved on the rotating shaft (7022) at a position relative to the flip chamber (7013); a plurality of limiting rings (7024) are arranged at the bottom end of the flip box (7023); a plurality of mounting holes (7025) are opened at the top end of the flip box (7023); a plurality of wide-mouthed test bottles (8) are arranged on the limiting rings (7024); and the closing component (705) is movably arranged on the mounting holes (7025); The intermittent assembly (703) comprises a mounting ring body (7031), a mounting groove (7032), a spring (7033), a positioning block (7034), a rotating disk (7035), a positioning groove (7036), a rotating rod (7037), a connecting block (7038) and a tension spring (7039); the mounting ring body (7031) is arranged between the bearing shell (7012) and the supporting side plate (7011); the mounting groove (7032) is arranged on the mounting ring body (7031) in an annular shape and at equal intervals; a plurality of the springs (7033) are arranged on the mounting groove (7032); the positioning block (7034) is connected to the spring The spring (7033) is away from one end of the installation groove (7032), the rotating disk (7035) is sleeved on one end of the rotating shaft (7022), the positioning grooves (7036) are arranged on the outer wall of the rotating disk (7035) in a ring shape with equal intervals, the positioning block (7034) is adapted to the shape of the positioning grooves (7036), the rotating rod (7037) is sleeved on the rotating shaft (7022) at a position relative to the rotating disk (7035), the connecting block (7038) is connected to the rotating disk (7035) and the rotating rod (7037), and the tension spring (7039) is connected to the two connecting blocks (7038).

2. The heavy metal solidification testing device for fly ash-based polymers according to claim 1, characterized in that: An inclined surface A (707) is provided at one end of the positioning block (7034) away from the spring (7033), and an inclined surface B (708) is provided at one end of the rotating rod (7037) away from the rotating shaft rod (7022), and the inclined surface A (707) is adapted to the inclined surface B (708).

3. The heavy metal solidification testing device for fly ash-based polymers according to claim 2, characterized in that: The mounting assembly (704) comprises a mounting plate (7041), a cylinder group (7042), a through hole (7043), a rotating cylinder (7044), a limiting rod (7045), a curved groove (7046) and a connecting cylinder A (7047); the mounting plate (7041) is arranged at the top of the bearing shell (7012); the cylinder group (7042) is arranged at the top of the mounting plate (7041); the through hole (7043) is opened on the mounting plate (7041); the rotating cylinder (7044) is arranged at the top of the bearing shell (7012); (7044) is connected to the output end of the cylinder group (7042) and is movably inserted into the insertion hole (7043), the limiting rod (7045) is arranged on the insertion hole (7043), the curved groove (7046) is opened on the outer wall of the rotating cylinder (7044), the limiting rod (7045) is adapted in size to the curved groove (7046), and the connecting cylinder A (7047) is connected to the bottom end of the rotating cylinder (7044) at a position above the closing component (705).

4. The heavy metal solidification testing device for fly ash-based polymers according to claim 3, characterized in that: The closing component (705) includes a connecting tube B (7051), a top plate (7052), a slide groove (7053), a slider (7054), a bottom plate (7055), a long hole (7056), a through hole (7057), a connecting cover (7058) and an internal thread (7059), wherein the connecting cover (7058) is arranged on the mounting hole (7025), the internal thread (7059) is opened on the connecting cover (7058), the bottom plate (7055) is arranged on the top of the connecting cover (7058), the through hole (7057) is opened on the bottom plate (7055), and the Long holes (7056) are opened in a circular shape at equal intervals on the bottom plate (7055) at positions relative to the through holes (7057); the bottom ends of a plurality of the sliders (7054) are slidably connected to the long holes (7056); the top plate (7052) is arranged at the top end of the sliders (7054); the slide grooves (7053) are opened in a circular shape at equal intervals on the bottom end of the top plate (7052); the top ends of the sliders (7054) are slidably connected to the slide grooves (7053); and the connecting tube B (7051) is arranged at a position below the top end of the top plate (7052) relative to the connecting tube A (7047).

5. The heavy metal solidification testing device for fly ash-based polymers according to claim 4, characterized in that: The bottom plate (7055) is also provided with a rotation groove (709), and the starter (706) is connected to the top of the top plate (7052) and movably penetrates the rotation groove (709); The starting member (706) includes a suspension rod (7061), a stop block (7062) and an offset block (7063), wherein the suspension rod (7061) is connected to the bottom end of the cylinder group (7042), the stop block (7062) is connected to the bottom end of the suspension rod (7061), and the offset block (7063) is connected to the top end of the top plate (7052) and is movably arranged on the rotating groove (709).

6. The heavy metal solidification testing device for fly ash-based polymers according to claim 5, characterized in that: The top of the wide-mouth test bottle (8) is provided with an external thread (801), and the external thread (801) is adapted to the connecting cover (7058) and the internal thread (7059).

7. A method for using the heavy metal solidification testing device for fly ash-based polymers as claimed in claim 6, characterized in that: The following steps are involved: S1, conveying operation; conveying the pretreated fly ash via a belt conveyor (2); S2, drying operation; The pre-treated fly ash is conveyed by the belt conveyor (2) and passes through a drying mechanism (3), whereby the fly ash is dried by the drying mechanism (3) to remove excess moisture; S3, mixing and stirring operation; The dried fly ash is transported to the mixing and stirring mechanism (5) through the transport pipe (4), and is fully blended and stirred with the alkali activator inside the mixing and stirring mechanism (5) to form a geopolymer; S4, extraction operation; After adding the extractant into the wide-mouth test bottle (8), the bottle is installed on the flip oscillation mechanism (7). The geopolymer is transported into the rotating cylinder (7044) through the connecting pipe (6). The stroke of the cylinder group (7042) causes the rotating cylinder (7044) to be pressed down inside the insertion hole (7043). The limit rod (7045) on the insertion hole (7043) slides in the curved groove (7046) of the rotating cylinder (7044), causing the rotating cylinder (7044) to rotate. The rotating cylinder (7044) drives the connecting cylinder A (7047) to rotate into the connecting cylinder B (7051). The connecting cylinder B (7051) drives the internal thread (7059) of the top plate (7052), the bottom plate (7055) and the connecting cover (7058) to rotate and connect with the wide-mouth test bottle (8). The geopolymer flows into the wide-mouth test bottle (8). When the cylinder group (7042) is pressed downward, the suspension rod (7061) and the stop block (7062) of the starter (706) are pressed downward, and the stop block (7062) and the offset block (7063) at the top of the top plate (7052) and movably arranged on the rotating groove (709) are pressed against each other, so that the offset block (7063) slides on the rotating groove (709), and the offset block (7063) drives the top plate (7052) to rotate, and the rotation of the top plate (7052) drives the slider (7054) to slide on the slide groove (7053) and the long hole (7056) to realize the closing of the through hole (7057); The cylinder group (7042) returns, driving the reduction motor (7021) to drive the rotating shaft (7022) to rotate, and the rotating shaft (7022) drives the rotating rod (7037) to rotate, and the inclined surface B (708) of the rotating rod (7037) contacts the inclined surface A (707) of the positioning block (7034), and the extrusion spring (7033) causes the positioning block (7034) to retract, and the positioning block (7034) retracts out of the positioning groove (7036), and the tension spring (7039) on the rotating rod (7037) pulls the connecting block (7038) and the rotating disk (7035) to achieve rapid intermittent rotation, so that the geopolymer and the leaching agent in the wide-mouth test bottle (8) are fused to extract the heavy metals; S5, measurement operation; The heavy metal content in the leaching agent was determined and compared with the heavy metal content in the original fly ash sample to evaluate the solidification effect of the geopolymer on heavy metals.

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