A material mixing device for tobacco fines alkalization treatment and an alkalization treatment process

Abstract

The application discloses a material mixing device for tobacco dust alkalization treatment and an alkalization treatment process, and belongs to the technical field of tobacco dust alkalization. The material mixing device for tobacco dust alkalization treatment and the alkalization treatment process comprise a tank body, the top of the tank body is provided with a cover plate, the top side of the cover plate is provided with a discharging pipe, the bottom of the cover plate is rotationally connected with a stirring shaft, the outer side of the stirring shaft is slidably connected with two box bodies, the bottom of each of the box bodies is slidably connected with a lower adjusting rod, the top of each of the box bodies is slidably connected with an upper adjusting rod, the inner side of the upper adjusting rod is provided with a first pin shaft and a second pin shaft in a penetrating manner, the two ends of the first pin shaft are provided with first sliding grooves, the two ends of the second pin shaft are provided with second sliding grooves, the first sliding grooves and the second sliding grooves are located on the inner side walls of the box bodies, and the first sliding grooves are slidably connected with the first pin shaft. The application effectively improves the operation efficiency of tobacco dust alkalization treatment, the raw material utilization efficiency and the equipment operation and maintenance efficiency.

Description

Technical Field

[0001] This invention relates to the field of tobacco dust alkalization technology, and in particular to a material mixing device and alkalization process for tobacco dust alkalization treatment. Background Technology

[0002] Tobacco dust is a major solid waste product generated during tobacco processing. It contains 60%-70% organic matter and is rich in the natural alkaloid nicotine, which has broad-spectrum contact and repellent effects on various soil pests such as aphids, root-knot nematodes, and grubs. It is a high-quality raw material for preparing green fertilizer synergists. Applying modified tobacco dust to fertilizer products can achieve high-value utilization of tobacco waste while reducing the use of chemical pesticides, aligning with the industrial needs of green agricultural development.

[0003] However, using raw tobacco dust directly as a fertilizer additive still has many technical drawbacks: First, the release of nicotine is uncontrollable, and it decomposes rapidly within 5-15 days after being applied to the soil, resulting in a short insecticidal effect that is difficult to match the insect control needs of crops throughout their entire growth period; second, it has strong initial biological inhibitory properties, and high concentrations of nicotine can easily inhibit the roots of crop seedlings and beneficial microorganisms in the soil, leading to seedling burn or inactivation of microbial fertilizers; third, it has poor physical properties, being fine powder with strong hygroscopicity, and is prone to clumping and generating a lot of dust when mixed with chemical fertilizers, which is not conducive to storage and mechanized application; fourth, it has a single function, relying solely on nicotine for insecticidal purposes, and cannot synergistically achieve nicotine release regulation, soil pH adjustment, and nutrient activation.

[0004] To address the aforementioned issues, the industry often employs alkalization treatment for targeted chemical modification of tobacco dust. Immersing tobacco dust in an alkaline solution removes some nicotine, adjusting its content to 0.3%-1.0%, effectively reducing initial biotoxicity. Simultaneously, it disrupts the tobacco fiber structure, releasing humic acid-like active substances, enhancing soil-improving effects. Furthermore, the treated product can neutralize acidic soils, expanding the product's application scenarios.

[0005] However, in actual industrial production, the alkalization treatment of tobacco dust is mostly carried out in conventional vertical stirred tanks. This process and equipment have obvious application defects. Due to the low moisture content and low bulk density of the raw tobacco dust, when it is fed from the top of the tank, the dry tobacco dust easily floats on the surface of the alkali solution. Under the continuous stirring action of the stirring shaft, the alkali solution in the tank will form a vortex structure with a concave center. The liquid level in the central area of ​​the vortex is low and the liquid film coverage is insufficient, causing some unwetted dry tobacco dust to adhere to the surface of the stirring shaft and fail to participate in the full alkalization reaction, ultimately resulting in uneven alkalization of the material. The product performance fluctuates significantly. Meanwhile, the material at the edge of the vortex is thrown to the upper part of the inner wall of the tank by centrifugal force. Long-term operation will cause material accumulation and scaling on the wall, which not only wastes raw materials but also increases the cost of equipment cleaning and maintenance. In addition, due to the structural characteristics of the deep tank, as the alkalization reaction progresses, the reacted material is prone to stratification and sedimentation at the bottom of the tank. This not only further aggravates the uniformity difference of the reaction system but also easily causes blockage of the discharge port, increasing the difficulty of discharge and restricting the efficiency and stability of large-scale continuous production. Summary of the Invention

[0006] The purpose of this invention is to solve many problems in existing tobacco dust alkalization treatment equipment, such as low material wetting efficiency, poor reaction uniformity, and poor material discharge, and to propose a material mixing device and alkalization treatment process for tobacco dust alkalization treatment.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A material mixing device and alkalization process for tobacco dust alkalization treatment includes a tank body. The top of the tank body is provided with a cover plate. A feed pipe is provided on one side of the top of the cover plate. A stirring shaft is rotatably connected to the bottom of the cover plate. Two boxes are slidably connected to the outside of the stirring shaft. A lower adjusting rod is slidably connected to the bottom of each box body. An upper adjusting rod is slidably connected to the top of each box body. A first pin and a second pin are provided through the inner side of the upper adjusting rod. A first sliding groove is provided at both ends of the first pin. A second sliding groove is provided at both ends of the second pin. A nozzle is fixedly connected to the outside of the upper adjusting rod. A second blade is rotatably connected to the bottom of both the upper and lower adjusting rods. An angle sensor is provided at the top of the second blade.

[0008] In some embodiments, the first chute and the second chute are both located on the inner sidewall of the box body. The first chute is slidably connected to the first pin, and the second pin and the second chute are slidably connected. The two boxes are arranged symmetrically with the stirring shaft as the axis of symmetry. A support is provided on the outer side of the tank body. A sampling tube is provided on one side of the middle part of the tank body. A maintenance plate is provided on one side of the top of the cover plate. A liquid inlet pipe is provided on the other side of the top of the cover plate. A first motor is provided on the top of the stirring shaft. The bottom of the first motor is fixedly connected to the cover plate.

[0009] In some embodiments, the top of the feed pipe is connected to a housing, the inside of the housing is rotatably connected to an auger blade, the outside of the auger blade is fixedly connected to a second motor, the inside of the second motor is fixedly connected to the housing, the top of the housing is provided with a hopper, and the bottom of the second motor is provided with a support frame.

[0010] In some embodiments, the bottom of the feeding pipe is provided with a feeding plate, the inner side of the feeding plate is rotatably connected to the top of the tank, a short rod is fixedly connected to the inner side of the feeding plate, a telescopic rod is hinged to the outer side of the short rod, and the other end of the telescopic rod is rotatably connected to the top of the tank.

[0011] In some embodiments, a first electric push rod is fixedly connected inside the stirring shaft, a connecting block is fixedly connected to the bottom of the first electric push rod, the connecting block is slidably connected to the stirring shaft, and the outer side of the connecting block is fixedly connected to the corresponding housing.

[0012] In some embodiments, a ring is slidably connected to the outer side of the stirring shaft, and a second electric push rod is provided at the bottom of the ring. The inner side of the second electric push rod is fixedly connected to the stirring shaft. Two locking rods are slidably connected inside the ring. The two locking rods are symmetrically arranged about the stirring shaft as an axis of symmetry. Each locking rod is slidably connected to a corresponding box body. Each locking rod has a slide rod at its bottom. The slide rod is slidably connected to the box body. A second connecting rod is rotatably connected to the bottom of the slide rod. A first blade is provided at the bottom of the second connecting rod. The outer side of the second connecting rod is rotatably connected to a lower adjusting rod.

[0013] In some embodiments, a first connecting rod is rotatably connected to the top of the slide rod, the outer side of the first connecting rod is hinged to the inner side of the upper adjusting rod, a third pin is provided near the top hinge point of the first connecting rod, a limit block is slidably connected to the bottom of the third pin, the inner wall of the limit block is fixedly connected to the box body, and a return spring is provided on the outer side of the limit block, the outer side of the return spring is fixedly connected to the box body.

[0014] In some embodiments, a spring is provided on one side of the top of the second blade, and the other end of the spring is fixedly connected to the inner wall of the upper or lower adjusting rod.

[0015] In some embodiments, a water pump is fixedly connected to the bottom of the stirring shaft, and a branch pipe is connected to one side of the bottom of the water pump. Two hoses are connected to the top of the branch pipe. The two hoses are arranged symmetrically with the stirring shaft as the axis of symmetry, and the outer ends of the hoses are connected to the corresponding nozzles.

[0016] A process for alkalizing tobacco dust includes the following steps: S1. Feeding: Alkaline solution is added inside the tank through the inlet pipe, and then the tobacco raw material is transported to the inside of the alkalization treatment tank through the discharge pipe. S2, Layered stirring alkalization: Drive the stirring shaft inside the tank to rotate, which in turn drives the upper and lower adjusting rods and the second blade at the bottom to rotate synchronously, stirring the tobacco and alkali solution in the tank in layers, so that the tobacco is soaked and undergoes an alkalization reaction; S3. Adhesive material rinsing: Adjust the deflection angle of the upper adjustment rod to simultaneously drive the nozzle installed on the upper adjustment rod to change the spray direction, and use liquid to flush the upper part of the inner side wall of the tank and the outer surface of the stirring shaft to remove the adhering dry soot. S4. Wetting detection and discharge: The deflection angle of the blade is collected in real time by the angle sensor on the second blade. The degree of wetting of the tobacco in the can is identified based on the deflection angle. After the preset standard is reached, the alkalization reaction is completed and the material is discharged.

[0017] Compared with the prior art, the present invention provides a material mixing device and alkalization process for tobacco dust alkalization treatment, which has the following beneficial effects.

[0018] 1. The present invention utilizes a dual-push rod collaborative structure, in which the first electric push rod drives the overall lifting and lowering of the box body and the second electric push rod drives the ring to generate relative displacement with the box body. This structure can not only achieve vertical position adjustment of the stirring component to complete the layered stirring inside the tank, but also switch the working state of the internal components through relative position changes. At the same time, it has a stroke compensation function to avoid misalignment and jamming of the internal transmission components, and ensure stable operation of the equipment under multiple working conditions.

[0019] 2. This invention utilizes an upper adjusting rod structure with double pin shafts and double sliding grooves, combined with linkage transmission to achieve extension, retraction, and multi-angle deflection of the upper adjusting rod. This allows the nozzle to flexibly adjust the spray direction, enabling all-round washing of the adhering soot on the stirring shaft, the inner wall of the tank, and the lower surface of the cover plate. This allows the dried material to fall back into the solution to continue participating in the alkalization reaction, improving raw material utilization and reducing material residue and cleaning burden.

[0020] 3. This invention, through the structure of the second blade with hinged joint and angle sensor, utilizes the positive correlation between the blade deflection angle and solution viscosity to identify the degree of tobacco wetting and alkalization progress in the tank online. Combined with the forward and reverse rotation control of the stirring shaft, the blades are locked in reverse rotation, increasing the flow area and enhancing the stirring and shearing effect, thus accelerating the dispersion and wetting of tobacco. When rotating forward, the blades adaptively deflect to unload, reducing the operating load of the equipment and balancing alkalization efficiency and equipment lifespan.

[0021] 4. The present invention, through the transmission structure of the sliding rod and the second connecting rod, the adjusting rod and the first blade can be driven to extend or retract according to the working conditions. In the initial stage of reaction and the feeding stage, the first blade extends and works with the second blade to increase the bottom stirring area and disturbance intensity, effectively disperse the soot accumulated at the bottom of the tank, prevent the discharge port from being blocked, ensure smooth feeding, and improve the mixing effect of the bottom material.

[0022] 5. This invention achieves the folding and retraction of the upper adjusting rod and blades through the cooperation of the slide track and the connecting rod transmission, which can significantly reduce the radial projection size of the stirring assembly. Combined with the detachable inspection plate structure at the cover, the internal stirring assembly can be taken out for cleaning and maintenance without disassembling the tank and cover as a whole, which significantly reduces the difficulty of maintenance operations and shortens the equipment maintenance time.

[0023] Other advantages, objectives and features of the invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be learned from practice of the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0026] Figure 3 This is a schematic diagram of the hopper and tank body of the present invention.

[0027] Figure 4 This is a schematic diagram of the hopper and feed pipe assembly structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the cross-sectional structure of the tank body of the present invention.

[0029] Figure 6 This is a schematic diagram of the structure of the telescopic rod and the feeding plate of the present invention.

[0030] Figure 7 This is a schematic diagram of the cross-sectional structure of the stirring shaft of the present invention.

[0031] Figure 8 This is a schematic diagram of the water pump and nozzle assembly structure of the present invention.

[0032] Figure 9 This is a cross-sectional structural diagram of the box body of the present invention.

[0033] Figure 10 This is a schematic diagram of the cooperation structure between the slide bar and the lower adjusting rod of the present invention.

[0034] Figure 11This is a schematic diagram showing the disassembled and assembled structure of the housing and the upper adjusting rod of the present invention.

[0035] Figure 12 This is a schematic diagram of the planar structure of the first and second slides of the present invention.

[0036] Figure 13 This is a schematic diagram of the cooperation structure between the first connecting rod and the upper adjusting rod of the present invention.

[0037] Figure 14 This is a schematic diagram of the structure in which the adjusting rod engages with the first and second sliding grooves according to the present invention.

[0038] Figure 15 This is a schematic diagram of the cooperation structure between the upper adjusting rod and the first connecting rod of the present invention.

[0039] Figure 16 This is a schematic diagram of the cooperation structure between the upper adjusting rod and the second blade in this invention.

[0040] In the picture: 101. Support frame; 102. Tank body; 103. Sampling tube; 104. Cover plate; 105. First motor; 106. Inlet pipe; 107. Inspection plate; 201. Support frame; 202. Hopper; 203. Second motor; 204. Shell; 205. Discharge pipe; 206. Screwdriver blade; 301. Telescopic rod; 302. Short rod; 303. Discharge plate; 401. Stirring shaft; 402. First electric push rod; 403. Connecting block; 404. Ring; 405. Clamping rod; 406. Second... Two electric push rods; 407, housing; 408, slide rod; 409, first connecting rod; 410, upper adjusting rod; 411, second connecting rod; 412, first blade; 413, lower adjusting rod; 414, spring; 415, second blade; 501, water pump; 502, branch pipe; 503, hose; 504, nozzle; 601, first slide groove; 602, second slide groove; 603, first pin; 604, second pin; 605, limit block; 606, third pin; 607, return spring. Detailed Implementation

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0042] Example 1: Reference Figures 1-16A material mixing device for alkalizing tobacco dust includes a tank 102. A cover plate 104 is provided on the top of the tank 102. A discharge pipe 205 is provided on one side of the top of the cover plate 104. A stirring shaft 401 is rotatably connected to the bottom of the cover plate 104. Two boxes 407 are slidably connected to the outer side of the stirring shaft 401. The vertical height of the two boxes 407 can be adjusted by sliding along the axial direction of the stirring shaft 401, providing a basis for position adjustment for layered mixing. A lower adjusting rod 413 is slidably connected to the bottom of each box 407. The bottom of 407 can slide horizontally inward or outward, changing the rotation radius of the second blade 415 through horizontal extension and retraction. This adapts to the stirring requirements at different liquid levels, expands the radial stirring coverage, avoids dead zones near the inner wall of tank 102, and prevents soot from settling and accumulating at the edges. The top of box 407 is slidably connected to an upper adjusting rod 410, the position and angle of which can be changed according to specific conditions. A first pin 603 and a second pin 604 are threaded through the inner side of the upper adjusting rod 410. The first pin 603 has a first groove 601 at both ends, and the second pin 604 has a second groove 602 at both ends. The first groove 601 and the second groove 602 are both located on the inner wall of the housing 407. The first groove 601 is slidably connected to the first pin 603, and the second pin 604 is slidably connected to the second groove 602. There are two first grooves 601 arranged symmetrically, and two second grooves 602 arranged symmetrically. The two first grooves 601 and the two second grooves 602 can connect the first pin 603... The upper adjusting rod 410 is clamped at both ends of the second pin 604, and the nozzle 504 is fixedly connected to the outer side of the upper adjusting rod 410. The double pin and double slide groove guide structure can accurately constrain the movement trajectory of the upper adjusting rod 410, ensuring that the upper adjusting rod 410 runs smoothly during horizontal extension and angular deflection without skewing or jamming, thus ensuring the accuracy and reliability of the nozzle 504 angle adjustment. The bottom of both the upper adjusting rod 410 and the lower adjusting rod 413 are rotatably connected to the second blade 415, and the top of the second blade 415 is equipped with an angle sensor.

[0043] When it is necessary to rinse the dried soot adhering to the stirring shaft 401 and the side wall of the tank 102, the upper adjusting rod 410 moves into the box 407 and tilts upwards, changing the angle of the nozzle 504 and thus changing the direction of water flow. The working principle is as follows: the first pin 603 slides synchronously along the first slide groove 601, and the second pin 604 slides synchronously along the second slide groove 602, causing the upper adjusting rod 410 to retract horizontally while simultaneously raising its elevation angle. This changes the spray direction of the nozzle 504 from horizontal to obliquely upwards and to the side, precisely covering the surface of the stirring shaft 401, the inner side wall of the tank 102, and the lower surface of the cover plate 104, flushing the dried soot down so that it enters the alkaline solution for alkalization. This rinsing structure effectively avoids material waste and cleaning difficulties caused by long-term adhesion of dried soot to the internal components of the tank, ensuring that all soot can enter the liquid phase to participate in the alkalization reaction, improving raw material utilization and reaction sufficiency.

[0044] Under normal stirring conditions, both the upper adjusting rod 410 and the lower adjusting rod 413 are in a horizontal state. By changing the height of the box 407, the upper and lower layers of stirring are achieved. The upper adjusting rod 410 and the lower adjusting rod 413 drive the second blade 415 to rotate in a circle, which increases the stirring effect. The synchronous rotation of the upper and lower blades can form two independent turbulent flow fields in the tank, which breaks the stratification phenomenon of solution concentration in the upper and lower layers that is easy to occur in single-layer stirring, accelerates the mass transfer rate between alkaline solution and tobacco dust, promotes the uniform advancement of alkalization reaction, and effectively avoids the settling and clumping of tobacco dust at the bottom of the tank.

[0045] like Figure 16 As shown in the diagram, rotating to the left can cause the second blade 415 to deflect. The principle is that the second blade 415 is hinged to the adjusting rod. In the forward rotation state, the second blade 415 can freely deflect around the hinge axis with the fluid resistance. In the early stage of alkalization, the viscosity of the internal solution is not high. As soaking progresses, more and more tobacco powder is soaked inside, and the internal viscosity increases. As a result, the fluid resistance on the second blade 415 increases. At the same rotation speed, the tilt angle of the second blade 415 is greater. The deflection angle of the blade is positively correlated with the viscosity of the solution. The higher the viscosity, the greater the tangential resistance that the second blade 415 experiences when rotating, and the more obvious the deflection amplitude.

[0046] By collecting the blade deflection angle using an angle sensor, the viscosity of the solution in the tank can be indirectly identified. If the viscosity is low, it indicates insufficient wetting of the tobacco and a low degree of alkalization. In this case, the stirring shaft 401 is reversed. Because the side wall of the second blade 415 is in contact with the inner walls of the upper adjusting rod 410 and the lower adjusting rod 413, the blade cannot deflect and can maintain a fixed angle of attack, thereby increasing the stirring effect. In the reverse lock state, the blade has a larger area facing the flow, which can generate stronger shear force and disturbance to the solution, quickly breaking up the agglomerated tobacco particles, accelerating the wetting and dispersion of the tobacco, and effectively shortening the alkalization cycle. In the forward rotation state, the blade can deflect adaptively according to the viscosity, which can reduce the load on the blade in the high viscosity stage, avoid overloading of the stirring shaft 401, improve the stability and service life of the equipment. At the same time, the variable angle stirring can form a variety of flow field states, further enhancing the dispersion and mixing effect of the material.

[0047] The two containers 407 are symmetrically arranged around the stirring shaft 401. This symmetrical structure ensures that the forces on both sides are balanced during stirring, preventing radial swaying of the stirring shaft 401 due to uneven loading and improving the stability and coaxiality of the shaft. A support 101 is provided on the outer side of the container 102, which is fixedly supported around the side wall of the container 102 to stably bear the overall weight of the container 102 and the materials inside. A sampling tube 103 is provided on one side of the middle of the container 102. The inner end of the sampling tube 103 extends into the main reaction area inside the container 102, allowing for real-time extraction of representative mixed material samples without interrupting the stirring operation or opening the cover 104. By detecting indicators such as the alkalinity, solution concentration, and pH value of the samples, operators can accurately monitor the reaction progress. The top side of the cover plate 104 is provided with a maintenance plate 107. The maintenance plate 107 adopts a detachable sealing structure. Under normal conditions, it is sealed with the cover plate 104 to ensure the sealed reaction environment inside the tank. When the equipment needs regular maintenance, internal component repair or deep cleaning, only the maintenance plate 107 needs to be removed to open the maintenance passage. There is no need to lift and remove the cover plate 104 as a whole, which greatly reduces the difficulty and time of maintenance operations. The other side of the top of the cover plate 104 is provided with a liquid inlet pipe 106. The alkaline solution is directionally introduced into the tank body 102 through the liquid inlet pipe 106. The top of the stirring shaft 401 is provided with a first motor 105. The bottom of the first motor 105 is fixedly connected to the cover plate 104. The first motor 105 controls the speed and direction of the stirring shaft 401 and stably outputs the power required for both forward and reverse rotation.

[0048] The top of the feeding pipe 205 is connected to the housing 204. The auger blades 206 are rotatably connected inside the housing 204. The second motor 203 is fixedly connected to the outside of the auger blades 206. The inside of the second motor 203 is fixedly connected to the housing 204. The top of the housing 204 is equipped with a hopper 202. The bottom of the second motor 203 is equipped with a support frame 201. The hopper 202 adopts a conical structure design that is wider at the top and narrower at the bottom, which facilitates the quick feeding of tobacco dust by workers or feeding equipment. The auger blades 206 are spiral conveying structures, which can realize the quantitative and uniform conveying of tobacco dust. The speed of the second motor 203 can be precisely adjusted through the electronic control system to flexibly match the stirring reaction progress inside the tank 102. The feeding rate can be adjusted in real time according to the solution viscosity and alkalization degree. The support frame 201 adopts a rigid support structure and is stably mounted between the outside of the housing 204 and the equipment base, which can provide all-round fixed load-bearing for the second motor 203.

[0049] The bottom of the feeding pipe 205 is provided with a feeding plate 303. The inner side of the feeding plate 303 is rotatably connected to the top of the tank body 102. A short rod 302 is fixedly connected to the inner side of the feeding plate 303. A telescopic rod 301 is hinged to the outer side of the short rod 302. The other end of the telescopic rod 301 is rotatably connected to the top of the tank body 102. During operation, the telescopic rod 301 actively retracts, pulling the hinged end to move inward, causing the short rod 302 to rotate and swing, thereby driving the feeding plate 303 to rotate synchronously around the hinge point at the top of the tank body 102, so that the feeding plate 303 flips open from the closed state, and the feeding pipe 205 is connected to the inside of the tank body 102, realizing the automatic feeding operation of tobacco dust.

[0050] A first electric push rod 402 is fixedly connected inside the stirring shaft 401. A connecting block 403 is fixedly connected to the bottom of the first electric push rod 402. The connecting block 403 is slidably connected to the stirring shaft 401. The outer side of the connecting block 403 is connected to the corresponding box 407 by bolts, which facilitates disassembly and maintenance later. The first electric push rod 402 adopts a waterproof and sealed structure. The outer wall of the push rod, the telescopic mating surface and the wiring port are all sealed and corrosion-resistant, which can effectively isolate water vapor, alkaline atomized liquid and humid and corrosive environment inside the tank. When the first electric push rod 402 extends, it can drive the connecting block 403 to descend, thereby driving the two boxes 407 to descend synchronously as a whole; conversely, when the electric push rod retracts, it can drive the box 407 to rise as a whole.

[0051] A ring 404 is slidably connected to the outer side of the stirring shaft 401. A second electric push rod 406 is located at the bottom of the ring 404. The inner side of the second electric push rod 406 is fixedly connected to the stirring shaft 401. The second electric push rod 406 adopts a waterproof sealing structure. The outer wall of the push rod, the telescopic mating surface, and the wiring port are all sealed and corrosion-resistant. The second electric push rod 406 has a power-off self-locking characteristic, which can automatically lock the current stroke after power failure, preventing displacement due to stirring vibration or material reaction force. The extension and retraction of the second electric push rod 406 can drive the ring 404 to move up and down. When the box 407 is raised, the second electric push rod 406 extends synchronously to ensure the relative stillness of the internal components of the box 407. The upper adjusting rod 410 and the lower adjusting rod 413 always remain horizontal, and then drive the second blade 415 to adjust the height, realizing layered stirring. That is to say, the state of the internal structure is adjusted by changing the relative position of the ring 404 and the internal components of the box 407. Two locking rods 405 are slidably connected inside the ring 404. Two clamping rods 405 are symmetrically arranged about the stirring shaft 401. The top of the clamping rod 405 is slidably connected to the groove of the ring 404. The ring 404 rotates with the stirring shaft 401 without affecting the height change of the clamping rod 405. Each clamping rod 405 is slidably connected to the corresponding box 407. The bottom of each clamping rod 405 is provided with a sliding rod 408, which is slidably connected to the box 407. The sliding rod 408 can only slide vertically within the box 407. The bottom of the sliding rod 408 is rotatably connected to a second connecting rod. 411, the bottom of the second connecting rod 411 is provided with a first blade 412. The outer side of the second connecting rod 411 is rotatably connected to the lower adjusting rod 413. When the slide rod 408 moves downward, it will push the second connecting rod 411 downward. The second connecting rod 411 drives the lower adjusting rod 413 to extend outward. At the same time, the second connecting rod 411 will gradually become horizontal, causing the first blade 412 fixedly connected to it to extend out from the bottom of the box 407, further increasing the stirring area at the bottom and preventing tobacco dust from depositing at the bottom after soaking.

[0052] The dual-push rod independent control structure enables stroke compensation. The first electric push rod 402 is responsible for driving the two side boxes 407 to rise and fall as a whole along the stirring shaft 401, adjusting the vertical working position of the stirring component. The second electric push rod 406 is responsible for driving the ring 404 and the internal transmission component to move relative to the box 407. By changing the relative position of the ring 404 and the box 407, the state switching of the internal adjusting rod and blades is completed. The cooperation of the two can avoid the internal transmission components from being misaligned and jammed due to excessive lifting stroke of the box 407, so that the equipment can stably achieve multiple working conditions such as stirring, rinsing, detection, and maintenance throughout the entire stroke range.

[0053] The top of the slide rod 408 is rotatably connected to a first connecting rod 409. The outer side of the first connecting rod 409 is hinged to the inner side of the upper adjusting rod 410. A third pin 606 is provided near the top hinge point of the first connecting rod 409. A limit block 605 is slidably connected to the bottom of the third pin 606. The inner wall of the limit block 605 is fixedly connected to the housing 407. When the slide rod 408 moves downward, it can cause the hinged first connecting rod 409 to shift downward, thereby pulling the upper adjusting rod 410 to move downward. During the downward movement of the first connecting rod 409, when the third pin 606 contacts the limit block 605... When the first link 409 moves to the side, under the constraint of the limiting block 605, it will cause the first link 409 to shift slightly to the outside, thereby further increasing the tilting range of the upper adjusting rod 410. The limiting block 605 is provided with a return spring 607 on the outside. The outside of the return spring 607 is fixedly connected to the box 407. The return spring 607 is normally in the released state. When the first link 409 moves downward and shifts to the outside, it will compress the return spring 607. When the first link 409 moves upward, it will be pushed to return to its original movement trajectory under the action of the return spring 607.

[0054] It should be noted that when the slide rod 408 moves vertically downwards, it can cause the lower adjusting rod 413 to extend slightly. Simultaneously, the second connecting rod 411 changes from inclined to horizontal, causing the first blade 412 and the second blade 415 at the bottom to extend simultaneously, increasing the stirring force at the bottom. At the same time, the slide rod 408 moves downwards, pulling the first connecting rod 409 to shift downwards to the side. Figure 12 As shown, the first pin 603 is located at point B1, and the second pin 604 is located at point B2. The first connecting rod 409 supports the hinge point of the upper adjusting rod 410. The first connecting rod 409 and the second pin 604 ensure that the upper adjusting rod 410 is horizontal (two points define a straight line). When the first connecting rod 409 shifts downwards, it pulls the hinge point of the upper adjusting rod 410 inwards. Under the constraint of the arc groove at point B1, the upper adjusting rod 410 rotates upwards. After the first pin 603 slides out of the arc segment, the inclined straight segment begins. The first pin 603 and the second pin... 604 drives the inclined upper adjusting rod 410 to move diagonally downwards. The upper adjusting rod 410 then gradually retracts into the housing 407. When the second pin 604 reaches the endpoint A2, meaning it can no longer move downwards, the third pin 606 of the first connecting rod 409 begins to contact the inclined edge of the limiting block 605. As the first connecting rod 409 continues to move diagonally downwards, constrained by the third pin 606, the top of the first connecting rod 409 begins to deflect slightly downwards along the limiting block 605, simultaneously compressing the return spring 607. This causes the first pin 603 to rotate around the second pin 604, thus achieving the desired effect. Figure 15As shown, the upper adjusting rod 410 is tilted, allowing the nozzle 504 to perform all-around rinsing. Then, the first connecting rod 409 shifts upwards. At this point, the return spring 607 pushes the first connecting rod 409 and the third pin 606 to move in the opposite direction. Simultaneously, the first connecting rod 409 pushes the upper adjusting rod 410 upwards. The first pin 603 and the second pin 604 move in the opposite direction along the first slide groove 601 and the second slide groove 602. Using the arc in area A1, the upper adjusting rod 410 can rotate in the opposite direction and then continue to move obliquely upwards until... Figure 13 In the state shown, if the first connecting rod 409 continues to move upward, since the second pin 604 has reached the end of the second slide groove 602, the first connecting rod 409 will apply an outward component force to the upper adjusting rod 410, pushing the first pin 603 to rotate downward along the slide groove direction of B1, eventually reaching... Figure 14 As shown, the upper adjusting rod 410 is folded, which reduces the size of the lateral cross section and makes it easier to remove from inside the tank 102 through the inspection port area. When the first connecting rod 409 pulls the upper adjusting rod 410 in the opposite direction, the first pin 603 will continue to rotate around the second pin 604 along the arc of segment B1. Only after the first pin 603 slides out from the arc segment can it drive the second pin 604 to move diagonally downwards in sync.

[0055] Springs 414 are provided on one side of the top of the second blade 415. The other end of the spring 414 is fixedly connected to the inner wall of the upper adjusting rod 410 or the lower adjusting rod 413. When the stirring shaft 401 reverses or the equipment stops, the fluid resistance decreases rapidly or even disappears. The spring 414 releases the stored elastic potential energy, stably pulling the second blade 415 to quickly reset, so that the blade returns to the initial vertical standard angle.

[0056] A water pump 501 is fixedly connected to the bottom of the stirring shaft 401. A branch pipe 502 is connected to one side of the bottom of the water pump 501. Two flexible hoses 503 are connected to the top of the branch pipe 502. The two flexible hoses 503 are symmetrically arranged about the stirring shaft 401. The outer ends of the flexible hoses 503 are connected to the corresponding nozzles 504. The water pump 501 is responsible for drawing and pressurizing the alkaline solution in the tank, providing stable water pressure for the nozzles 504 to spray and rinse. The water inlet of the water pump 501 is equipped with a special filter screen structure. The filter screen is made of fine and corrosion-resistant filter screen material. The branch pipe 502 adopts an integrated diversion structure, which can evenly divide the single water flow pressurized by the water pump 501 into two equal water flows. The hose 503 has excellent flexibility and deformation adaptability, and can be adapted to multi-dimensional position adjustment movements such as extension and retraction of the upper adjusting rod 410, angle deflection, and lifting and lowering of the box 407. It can be bent freely. During operation, the water pump 501 draws alkaline solution from the tank through the filter screen, pressurizes it, and then distributes it through the branch pipe 502 and hose 503, and finally sprays it out under high pressure from the nozzles 504 on both sides. Combined with the angle adjustment function of the upper adjusting rod 410, the spray direction and spray range can be flexibly adjusted to accurately wash the dried soot adhering to the surface of the stirring shaft 401, the inner wall of the tank 102, the adjusting rod and blades in all directions, and completely wash the attached residual soot into the alkaline solution to participate in the alkali reaction.

[0057] Specifically, during routine alkalization operations, the second electric push rod 406 remains in a self-locking state, keeping the ring 404 and the box 407 in a fixed relative position. The upper adjusting rod 410 and the lower adjusting rod 413 both maintain a horizontally extended state. The first electric push rod 402 drives the two boxes 407 to rise and fall axially along the stirring shaft 401 through the connecting block 403. The second electric push rod 406 synchronously extends and retracts to compensate for displacement, ensuring that the relative positions of each transmission element in the box 407 are stable and preventing internal mechanism misalignment and jamming. As the stirring shaft 401 continues to rotate, the upper and lower sets of second blades 415 synchronously perform circumferential rotation, forming two independent turbulent flow fields in the tank. This allows for uniform stirring of materials at different depths in the tank 102, effectively breaking the solution concentration stratification phenomenon that easily occurs with single-layer stirring, accelerating the mass transfer rate between the alkaline solution and the tobacco dust, promoting the uniform advancement of the alkalization reaction, and preventing the tobacco dust from settling and agglomerating at the bottom of the tank.

[0058] After the tobacco dust is fed in, the second electric push rod 406 is activated. Through the transmission of the ring 404, the locking rod 405 and the sliding rod 408, the upper adjusting rod 410 is driven to rotate and tilt upward along the sliding groove, so that the nozzle 504 faces the area around the stirring shaft 401. At the same time, the first electric push rod 402 drives the box body 407 to move upward to the upper space of the tank 102. The lower adjusting rod 413 extends horizontally to the outside, expanding the turning radius of the second blade 415 at the bottom. The second connecting rod 411 also becomes horizontal, driving the first blade 412 to extend. In the early stage of the reaction, the tobacco dust just enters the tank 102 and easily falls and accumulates along the stirring shaft 401, adhering to the surface of the shaft. At this time, the upper solution rotates at high speed, and with the continuous spraying of alkaline solution by the nozzle 504, the tobacco dust accumulated around the stirring shaft 401 can be simultaneously washed and strongly dispersed, so that the attached dry tobacco dust can be quickly detached and dispersed into the solution, avoiding the agglomeration and accumulation of materials around the shaft, and ensuring the smooth start of the initial wetting and alkalization reaction.

[0059] After the circumferential area is rinsed, the first electric push rod 402 drives the entire box 407 to move slowly downwards. At the same time, the internal transmission mechanism drives the upper adjusting rod 410 to deflect outwards, so that the nozzle 504 sprays towards the inner wall of the tank 102 and the lower surface of the cover plate 104. During the stirring process, the material is easily thrown towards the inner wall of the tank 102 due to centrifugal force, and some fine smoke particles will splash and adhere to the lower surface of the cover plate 104. If left for a long time, they will dry and become difficult to clean. As the box 407 moves from top to bottom, the nozzle 504 can gradually rinse the entire inner wall of the tank 102 vertically, while spraying obliquely to cover the lower surface of the cover plate 104, achieving thorough rinsing of the inner and top walls of the tank 102. All the splashed and adhered smoke particles are washed into the solution to participate in the reaction, which not only improves the utilization rate of raw materials, but also avoids the difficulty of equipment cleaning and material waste caused by long-term residue of dried smoke particles.

[0060] After rinsing, the upper adjusting rod 410 and the lower adjusting rod 413 are reset to the horizontal position, and the equipment enters the viscosity detection and reaction control stage. When the stirring shaft 401 rotates forward, the second blade 415 can deflect around the hinge shaft according to the fluid resistance. The angle sensor collects the deflection angle of the blade in real time, indirectly identifying the viscosity of the solution in the tank. If the viscosity is detected to be too low, it indicates that the tobacco powder is not sufficiently wetted and the degree of alkalization is insufficient. At this time, the stirring shaft 401 is controlled to switch to the reverse mode. The side wall of the second blade 415 abuts and locks against the inner wall of the adjusting rod, maintaining a fixed angle of attack. The blade has a larger area facing the flow, which can generate stronger shearing and disturbance effects on the solution, quickly breaking up the agglomerated tobacco powder and accelerating the wettation and dispersion. When the solution viscosity is detected to rise to the threshold, the rotation mode is switched back to forward. The second blade 415 deflects adaptively with the viscosity to unload, reducing the motor operating load and avoiding overload of the stirring shaft 401, thus balancing alkalization efficiency and equipment operating stability.

[0061] During the alkalization reaction, angle sensors mounted on the second blade 415 at the bottom of the upper regulating rod 410 and the lower regulating rod 413 collect the blade deflection angle in real time. When it is detected that the upper blade deflection amplitude is small and the lower blade deflection amplitude is large, it is determined that a concentration stratification of thin upper and thick lower has occurred in the tank 102. The two sets of boxes 407 are controlled to move downward along the stirring shaft 401 as a whole, while the slide rod 408 moves vertically downward. The slide rod 408 drives the second connecting rod 411 to gradually become horizontal, pushing the lower regulating rod 413 to extend outward and unfold the first blade 412, increasing the bottom stirring radius and the flow-facing area, strengthening the bottom stirring intensity, and simultaneously pulling the first connecting rod 409 to deflect, causing the upper regulating rod 410 to retract and rise along the first slide groove 601 and the second slide groove 602. The rotation radius of the upper second blade 415 decreases, and the stirring force decreases accordingly. Finally, under the premise that the stirring shaft 401 speed remains unchanged, a differentiated flow field with strong bottom stirring and weak top stirring is formed, which effectively breaks the concentration stratification between the upper and lower parts of the tank and promotes the uniform advancement of the alkalization reaction in the whole tank.

[0062] During the feeding process, the upper adjusting rod 410 maintains an inclined angle to continuously rinse the surface of the stirring shaft 401, preventing residual smoke particles from adhering and drying during feeding. Simultaneously, the internal sliding rod 408 moves downwards, pushing the second connecting rod 411 to gradually rotate to a horizontal position, allowing the first blade 412 to fully extend from the bottom of the box 407, forming a double-blade bottom stirring structure with the second blade 415 on the lower adjusting rod 413. As the material in the tank gradually decreases during feeding, the concentration of smoke particles at the bottom increases, making it prone to settling and accumulating, which can cause blockage at the discharge port. The coordinated operation of the double blades significantly enhances the stirring and disturbance intensity in the bottom area, breaking up the accumulated smoke particles and keeping the material at the bottom of the tank in a suspended and flowing state. This ensures a smooth feeding channel, effectively preventing blockage at the discharge port and improving feeding efficiency and operational stability.

[0063] During equipment operation, if the blade deflection angle data collected by the angle sensor does not change significantly after the stirring shaft 401 is switched back and forth, it is determined that there is jamming in the corresponding adjustment rod area, indicating an internal soot accumulation and blockage fault. At this time, the control system drives the slide bar 408 to move upward as a whole, the lower adjustment rod 413 slides inward and retracts, and the second connecting rod 411 rotates upward and retracts, causing the first blade 412 to tilt and retract, reducing the lateral projection area; at the same time, the upper adjustment rod 410 flips and folds downward along the slide groove trajectory, and is retracted into the outline of the box 407, which greatly reduces the overall radial dimension of the stirring assembly. After retraction, the stirring assembly can be removed for cleaning and maintenance through the inspection port on the cover plate 104 without disassembling the entire tank 102 and cover plate 104, which greatly reduces the difficulty of equipment inspection and fault cleaning, shortens maintenance time, and solves the inconvenience of traditional reactor internal stirring mechanism maintenance requiring complete disassembly.

[0064] Example 2: A process for alkalizing tobacco dust includes the following steps: S1. Feeding: Alkaline solution is added inside the tank 102 through the liquid inlet pipe 106, and then the tobacco raw material is transported to the inside of the alkalization treatment tank 102 through the discharge pipe 205. S2, Layered stirring alkalization: Drive the stirring shaft 401 inside the tank 102 to rotate. The stirring shaft 401 drives the upper adjusting rod 410 and the lower adjusting rod 413 and the second blade 415 at the bottom to rotate synchronously, so as to stir the tobacco and alkali solution in the tank in layers, so that the tobacco is soaked and alkalization reaction occurs. S3, Adhesive material rinsing: Adjust the deflection angle of the upper adjusting rod 410, and simultaneously drive the nozzle 504 installed on the upper adjusting rod 410 to change the spray direction, and use liquid to flush the upper part of the inner wall of the tank 102 and the outer surface of the stirring shaft 401 to remove the adhering dry soot. S4. Wetting detection and discharge: The deflection angle of the blade is collected in real time by the angle sensor on the second blade 415. The degree of wetting of the tobacco in the can is identified based on the deflection angle. After the preset standard is reached, the alkalization reaction is completed and the material is discharged.

[0065] Specifically, a properly proportioned alkaline solution is first injected into the tank through the inlet pipe 106 at the top of the tank 102. The injection stops once the liquid level reaches the preset height. Then, the tobacco feeding process begins: tobacco raw materials are fed into the hopper 202, and the second motor 203 drives the auger blades 206 inside the housing 204 to rotate at a constant speed. The auger pushes the tobacco quantitatively and continuously into the discharge pipe 205. After feeding is completed, the discharge plate 303 resets and closes, and the first motor 105 starts, driving the stirring shaft 401 to rotate at a constant speed. Under these conditions, both the upper adjusting rod 410 and the lower adjusting rod 413 remain horizontally extended, and the two sets of second blades 415 rotate circumferentially with the stirring shaft 401, forming two independent turbulent flow fields inside the tank. This initially disperses the tobacco particles and promotes thorough contact and mixing between the tobacco and the alkaline solution. During the stirring process, the first electric push rod 402 inside the stirring shaft 401 extends and retracts to drive the connecting block 403 to rise and fall axially, thereby driving the two side boxes 407 to adjust their vertical working height synchronously. The second blade 415 can adaptively deflect according to the fluid resistance of the solution, reducing the operating load of the equipment while ensuring the mixing effect, so that the tobacco dust is continuously soaked in the alkaline solution and gradually undergoes an alkalization reaction. The viscosity of the solution in the tank gradually increases as the reaction progresses. During the alkalization reaction, the equipment starts the adhering material rinsing process at regular intervals. The second electric push rod 406 drives the ring 404 to rise and fall along the stirring shaft 401. Through the transmission cooperation of the clamp rod 405, the slide rod 408, and the first connecting rod 409, the upper adjusting rod 410 moves and deflects along the trajectory of the first slide groove 601 and the second slide groove 602, so that the spray direction of the nozzle 504 is adjusted accordingly, aiming at the outer wall of the stirring shaft 401, the upper part of the inner side wall of the tank 102, and the lower surface of the cover plate 104. At the same time, the water pump 501 at the bottom of the stirring shaft 401 is started. After the water inlet is filtered by the filter screen, the alkaline solution in the tank is drawn out, pressurized, and evenly distributed through the branch pipe 502, and then delivered to the nozzles 504 on both sides for high-pressure spraying through the hose 503. During rinsing, the box 407 moves slowly up and down with the first electric push rod 402, driving the nozzle 504 to sweep vertically across the walls and surfaces of the components inside the can, thoroughly washing away the splashed and adhered dry tobacco dust, allowing it to fall into the solution below to continue participating in the alkalization reaction. Throughout the alkalization stirring process, the angle sensor at the top of the second blade 415 collects the blade deflection angle data in real time. Utilizing the positive correlation between solution viscosity and blade deflection angle, the degree of soaking and wetting of the tobacco dust inside the can is indirectly identified, thereby determining the progress of the alkalization reaction.

[0066] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A material mixing device for alkalizing tobacco dust, comprising a tank (102), wherein a cover plate (104) is provided on the top of the tank (102), a discharge pipe (205) is provided on one side of the top of the cover plate (104), and a stirring shaft (401) is rotatably connected to the bottom of the cover plate (104), characterized in that, Two boxes (407) are slidably connected to the outside of the stirring shaft (401). A lower adjusting rod (413) is slidably connected to the bottom of each box (407), and an upper adjusting rod (410) is slidably connected to the top of each box (407). A first pin (603) and a second pin (604) are provided through the inner side of the upper adjusting rod (410). A first groove (601) is provided at both ends of the first pin (603), and a second groove (602) is provided at both ends of the second pin (604). A nozzle (504) is fixedly connected to the outside of the upper adjusting rod (410). A second blade (415) is rotatably connected to the bottom of both the upper adjusting rod (410) and the lower adjusting rod (413). An angle sensor is provided at the top of the second blade (415).

2. The material mixing equipment for alkalization treatment of tobacco dust according to claim 1, characterized in that, The first chute (601) and the second chute (602) are both located on the inner sidewall of the box body (407). The first chute (601) is slidably connected to the first pin (603), and the second pin (604) and the second chute (602) are slidably connected. The two boxes (407) are arranged symmetrically with the stirring shaft (401) as the axis of symmetry. The outer side of the tank body (102) is provided with a bracket (101). The middle side of the tank body (102) is provided with a sampling tube (103). The top side of the cover plate (104) is provided with a maintenance plate (107). The other side of the top of the cover plate (104) is provided with a liquid inlet pipe (106). The top of the stirring shaft (401) is provided with a first motor (105). The bottom of the first motor (105) is fixedly connected to the cover plate (104).

3. The material mixing equipment for alkalization treatment of tobacco dust according to claim 1, characterized in that, The top of the feed pipe (205) is connected to a housing (204). An auger blade (206) is rotatably connected inside the housing (204). A second motor (203) is fixedly connected to the outside of the auger blade (206). The inside of the second motor (203) is fixedly connected to the housing (204). A hopper (202) is provided at the top of the housing (204). A support frame (201) is provided at the bottom of the second motor (203).

4. The material mixing equipment for alkalization treatment of tobacco dust according to claim 1, characterized in that, The bottom of the feeding pipe (205) is provided with a feeding plate (303). The inner side of the feeding plate (303) is rotatably connected to the top of the tank (102). A short rod (302) is fixedly connected to the inner side of the feeding plate (303). A telescopic rod (301) is hinged to the outer side of the short rod (302). The other end of the telescopic rod (301) is rotatably connected to the top of the tank (102).

5. A material mixing device for alkalization treatment of tobacco dust according to claim 1, characterized in that, The stirring shaft (401) is fixedly connected to a first electric push rod (402), and a connecting block (403) is fixedly connected to the bottom of the first electric push rod (402). The connecting block (403) is slidably connected to the stirring shaft (401), and the outer side of the connecting block (403) is fixedly connected to the corresponding box body (407).

6. The material mixing equipment for alkalization treatment of tobacco dust according to claim 1, characterized in that, A ring (404) is slidably connected to the outer side of the stirring shaft (401). A second electric push rod (406) is provided at the bottom of the ring (404). The inner side of the second electric push rod (406) is fixedly connected to the stirring shaft (401). Two locking rods (405) are slidably connected inside the ring (404). The two locking rods (405) are symmetrically arranged with the stirring shaft (401) as the axis of symmetry. Each locking rod (405) is slidably connected to the corresponding box (407). Each locking rod (405) is provided with a sliding rod (408) at the bottom. The sliding rod (408) is slidably connected to the box (407). A second connecting rod (411) is rotatably connected to the bottom of the sliding rod (408). A first blade (412) is provided at the bottom of the second connecting rod (411). The outer side of the second connecting rod (411) is rotatably connected to the lower adjusting rod (413).

7. A material mixing device for alkalization treatment of tobacco dust according to claim 6, characterized in that, The top of the slide rod (408) is rotatably connected to a first connecting rod (409). The outer side of the first connecting rod (409) is hinged to the inner side of the upper adjusting rod (410). A third pin (606) is provided near the top hinge point of the first connecting rod (409). A limit block (605) is slidably connected to the bottom of the third pin (606). The inner wall of the limit block (605) is fixedly connected to the box body (407). A return spring (607) is provided on the outer side of the limit block (605). The outer side of the return spring (607) is fixedly connected to the box body (407).

8. A material mixing device for alkalization treatment of tobacco dust according to claim 1, characterized in that, Each of the top sides of the second blade (415) is provided with a spring (414), and the other end of the spring (414) is fixedly connected to the inner wall of the upper adjusting rod (410) or the lower adjusting rod (413).

9. A material mixing device for alkalization treatment of tobacco dust according to claim 1, characterized in that, A water pump (501) is fixedly connected to the bottom of the stirring shaft (401). A branch pipe (502) is connected to one side of the bottom of the water pump (501). Two hoses (503) are connected to the top of the branch pipe (502). The two hoses (503) are arranged symmetrically with the stirring shaft (401) as the axis of symmetry. The outer ends of the hoses (503) are connected to the corresponding nozzles (504).

10. A tobacco dust alkalization treatment process, applied to a material mixing device for tobacco dust alkalization treatment as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1, Feeding: Alkaline solution is added inside the tank (102) through the liquid inlet pipe (106), and then the tobacco raw material is transported to the inside of the alkalization treatment tank (102) through the discharge pipe (205); S2, Layered stirring alkalization: Drive the stirring shaft (401) inside the tank (102) to rotate, and drive the upper adjusting rod (410) and the lower adjusting rod (413) and the second blade (415) at the bottom of the stirring shaft (401) to rotate synchronously, so as to stir the tobacco and alkali solution in the tank in layers, so that the tobacco is soaked and alkalization reaction occurs. S3, Adhesive material rinsing: Adjust the deflection angle of the upper adjustment rod (410) to simultaneously drive the nozzle (504) installed on the upper adjustment rod (410) to change the spray direction, and use liquid to flush the upper part of the inner wall of the tank (102) and the outer surface of the stirring shaft (401) to remove the adhering dry soot. S4. Soaking detection and discharge: The deflection angle of the blade is collected in real time by the angle sensor on the second blade (415). The degree of soaking and wetting of the tobacco in the can is identified according to the deflection angle. After reaching the preset standard, the alkalization reaction is completed and the material is discharged.

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