Device for preparing dry calcium hydroxide from calcium carbide mud

Abstract

The application relates to the technical field of calcium carbide mud processing, and discloses a device for preparing dry powder calcium hydroxide from calcium carbide mud, which comprises multiple groups of supporting legs, a drying cylinder is fixedly connected between the upper ends of the multiple groups of supporting legs, a discharge pipe is fixedly connected to the lower end of the left side of the drying cylinder, a mixing cylinder is fixedly connected to the upper end of the right side of the drying cylinder through a supporting frame, the lower end of the mixing cylinder penetrates into the inside of the drying cylinder and is fixedly connected with the drying cylinder, an electric heating plate is fixedly connected in the inside of the drying cylinder, a stirring shaft is rotationally connected in the inside of the drying cylinder, multiple groups of stirring blades are symmetrically arranged on the front and back of the stirring shaft, a motor is fixedly connected to the left end of the drying cylinder, and the output shaft end of the motor is fixedly connected with the left end of the stirring shaft. Through the synergistic effect of the material scattering and diffusing assembly and the limiting mechanism, the additives are uniformly scattered under the cooperation of the rotating centrifugal force of the rotating disc and the shielding of the stepped material blocking cover, local clumps caused by one-time concentrated feeding are effectively avoided, the mixing time is significantly shortened, and the energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of calcium carbide sludge processing technology, and in particular to an apparatus for preparing dry calcium hydroxide powder from calcium carbide sludge. Background Technology

[0002] Calcium carbide sludge is a paste-like residue produced after the hydrolysis of calcium carbide to produce acetylene. Its main component is calcium hydroxide, and it also contains small amounts of free carbon, ferrosilicon particles, sulfides, and 35 wt%–50 wt% water. Due to its strong alkalinity and high moisture content, long-term direct storage can easily lead to soil alkalization and water pollution. Currently, a five-step process of "dehydration—crushing—mixing—drying—grinding" is commonly used to convert calcium carbide sludge into dry calcium hydroxide powder with a moisture content ≤2 wt% and a particle size ≥325 mesh, in order to achieve harmless and resource-efficient utilization.

[0003] In the mixing process, existing technology involves feeding crushed calcium carbide sludge particles into a mixing drum, manually adding powdered additives (such as surfactants, dispersants, crystal form control agents, etc.) in one go, and then stirring the calcium carbide sludge particles with the additives through a top stirring paddle. After being stirred evenly, the mixture is sent to a rotary kiln or other drying equipment by a screw conveyor.

[0004] However, the above process has the following drawbacks: the additives are easily added at once and form local clumps with the calcium carbide sludge particles, requiring a long time of stirring to achieve uniform mixing, which leads to increased energy consumption. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an apparatus for preparing dry powder calcium hydroxide from calcium carbide sludge, so as to solve the problems of local agglomeration, long mixing time and high energy consumption caused by the one-time addition of additives.

[0006] This invention provides an apparatus for preparing dry powder calcium hydroxide from calcium carbide sludge, comprising multiple sets of support legs, with a drying cylinder fixedly connected to the upper ends of the multiple sets of support legs. A discharge pipe is fixedly connected to the lower left end of the drying cylinder, and a mixing cylinder is fixedly connected to the upper right end of the drying cylinder via a support frame. The lower end of the mixing cylinder extends into and is fixedly connected to the drying cylinder. An electric heating plate is fixedly connected inside the drying cylinder, and a stirring shaft is rotatably connected inside the drying cylinder. Multiple sets of stirring blades are symmetrically arranged at the front and rear of the stirring shaft. A motor is fixedly connected to the left end of the drying cylinder, and the output shaft of the motor is fixedly connected to the left end of the stirring shaft. The apparatus also includes:

[0007] A feed pipe, which is fixedly connected to the side wall of the mixing cylinder;

[0008] An installation sleeve is fixedly connected to the upper end of the mixing cylinder. A feed funnel is fixedly connected inside the installation sleeve. The lower end of the feed funnel extends into the interior of the mixing cylinder and is coaxially arranged with the mixing cylinder.

[0009] A rotating shaft is rotatably connected inside the mixing cylinder via a mounting bracket. The upper end of the rotating shaft extends into the inside of the feed hopper. A first stirring rod is fixedly connected to the side wall of the rotating shaft inside the mixing cylinder. A second stirring rod and a third stirring rod are fixedly connected to the side wall of the rotating shaft inside the feed hopper. The second stirring rod is located above the third stirring rod. A material spreading and diffusion component is also provided on the side wall of the rotating shaft inside the mixing cylinder.

[0010] The transmission mechanism is installed on the right side of the drying cylinder;

[0011] A limiting mechanism is installed inside the mixing cylinder. The limiting mechanism works with the material spreading and diffusion assembly to evenly spread the material in the feed hopper into the mixing cylinder.

[0012] An angle adjustment mechanism is installed on the right side of the drying cylinder and is used to adjust the deflection angle of the stirring blades.

[0013] Preferably, a spiral stirring blade is also fixedly connected to the side wall of the rotating shaft inside the mixing cylinder.

[0014] Preferably, the material spreading and diffusion assembly includes a turntable and a first guide block. The turntable is fixedly connected to the side wall of the rotating shaft and is located directly below the discharge port of the feed funnel. Multiple first guide blocks are provided and fixedly connected to the upper end of the turntable at equal intervals. A second guide block is provided between adjacent first guide blocks, and all second guide blocks are fixedly connected to the upper end of the turntable.

[0015] Preferably, the transmission mechanism includes a transmission rod and a first bevel gear. A protective box is fixedly connected to the inner wall of the lower end of the mixing cylinder. The transmission rod is rotatably connected inside the protective box. The right end of the transmission rod passes through the mixing cylinder and the support frame in sequence and is rotatably connected to both. The right end of the transmission rod is connected to the right end of the stirring shaft through a pulley assembly. The first bevel gear is fixedly connected to the left end of the transmission rod. A second bevel gear is fixedly connected to the side wall of the rotating shaft. The second bevel gear meshes with the first bevel gear.

[0016] Preferably, the limiting mechanism includes a rotating sleeve and a baffle. The rotating sleeve is rotatably connected to the outer wall of the mounting sleeve. A deceleration assembly is provided at the upper end of the rotating sleeve. The rotating sleeve is connected to the rotating shaft through the deceleration assembly. The side wall of the rotating sleeve is provided with a first arc-shaped groove and a second arc-shaped groove at equal intervals. Adjacent first arc-shaped grooves are connected through the second arc-shaped groove. A plurality of guide rods are provided at equal intervals at the upper end of the mixing cylinder. The lower end of the guide rods penetrates into the interior of the mixing cylinder and is slidably connected thereto. The baffle is fixedly connected to the lower end of the plurality of guide rods. The inner diameter of the baffle decreases from bottom to top and is set in a stepped shape. The upper end of the guide rod is located inside the first arc-shaped groove and is slidably connected thereto.

[0017] Preferably, the upper end of the baffle is rotatably sleeved on the lower side wall of the feed funnel, and a spring is fixedly connected to the upper end of the baffle, the upper end of the spring being fixedly connected to the top of the inside of the mixing cylinder.

[0018] Preferably, the reduction assembly includes a drive shaft and a third bevel gear. The drive shaft is rotatably connected to the upper end of the mounting sleeve via a bearing housing. The third bevel gear is fixedly connected to the right end of the drive shaft and meshes with a fourth bevel gear fixedly connected to the upper end of the rotating sleeve. A fifth bevel gear is fixedly connected to the left end of the drive shaft, and the fifth bevel gear meshes with a sixth bevel gear fixed to the upper end of the rotating shaft. The third, fifth, and sixth bevel gears are of the same type, and the transmission ratio between the fourth and third bevel gears is 60:1.

[0019] Preferably, the angle adjustment mechanism includes a worm gear and a worm. The worm is fixedly sleeved on the right side wall of the stirring shaft. The right end of the drying cylinder is rotatably connected to a rotating shaft via a bearing seat. The worm gear is fixedly connected to the side wall of the rotating shaft. The worm and the worm gear mesh with each other. Eccentric wheels are fixedly connected to both the front and rear sides of the rotating shaft. A connecting rod is rotatably connected to the side wall of the eccentric wheel. Supports are symmetrically fixedly connected to the front and rear of the right end of the drying cylinder. A first positioning rod is fixedly connected between the ends of the two supports. A lever is rotatably connected to both the front and rear sides of the first positioning rod. A second positioning rod is fixedly connected between the two levers. The side of the connecting rod away from the eccentric wheel is rotatably connected to the side wall of the second positioning rod. A limit groove is formed on the upper front end face of the lever. A slider is slidably connected inside the limit groove. A connecting shaft is rotatably connected inside the slider. A connecting ring is fixedly connected to one adjacent end of the two connecting shafts. A driving assembly is provided inside the connecting ring. The driving assembly is used to drive the stirring blade to reciprocate.

[0020] The drive assembly includes a connecting block and a drive rod. The right end face of the stirring shaft has an installation cavity and a sliding groove. The sliding groove is provided in pairs and is located at the lower rear end and the upper front end of the installation cavity, respectively. The installation cavity and the sliding groove are interconnected. The drive rod is slidably connected inside the installation cavity. Both ends of the installation cavity are fixedly connected at equal intervals. The racks are located inside the sliding grooves and are slidably connected thereto. Each rack meshes with a gear. The end of the gear away from the drive rod is fixedly connected to a fixed shaft. The end of the fixed shaft extends through to the outside of the stirring shaft and is rotatably connected thereto. The end of the fixed shaft is fixedly connected to the corresponding stirring blade. The connecting block is fixedly connected to the right end of the drive rod and is rotatably sleeved inside the connecting ring.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention utilizes the synergistic effect of the spreading and diffusion components and the limiting mechanism to ensure that the additives are evenly distributed under the combined effect of the centrifugal force of the rotating turntable and the shielding effect of the stepped baffle, effectively avoiding local clumps caused by concentrated feeding at one time, significantly shortening the mixing time and reducing energy consumption.

[0023] 2. This invention uses the rotation of the stirring shaft, in conjunction with the worm gear-worm-eccentric wheel-connecting rod mechanism, to drive the connecting ring to reciprocate and translate, thereby driving the rack and gear to change the tilt angle of the stirring blades in real time. This enables the material to undergo a triple combined motion of axial propulsion, radial tumbling and shearing during the drying stage, improving heat exchange efficiency and preventing material from sticking to the wall and clogging.

[0024] 3. This invention integrates a spiral stirring blade, a first stirring rod, a second stirring rod, and a third stirring rod on the same rotating shaft, so that the calcium carbide sludge particles and additives are pre-mixed in the mixing drum before entering the drying drum; the rotating shaft and the stirring shaft are connected by a transmission mechanism and driven by a single motor, realizing an integrated continuous operation of "first uniform mixing, then drying", which simplifies the process, saves space, and reduces equipment investment and maintenance costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall main structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the main cross-sectional structure of the drying cylinder of the present invention;

[0027] Figure 3 For the present invention Figure 2 Enlarged structural diagram of section A in the middle;

[0028] Figure 4 This is a schematic diagram of the rear cross-sectional structure of the mixing cylinder of the present invention;

[0029] Figure 5 For the present invention Figure 4 Enlarged structural diagram of section B in the middle;

[0030] Figure 6 This is a schematic diagram of the cross-sectional structure of the feed funnel of the present invention;

[0031] Figure 7 This is a schematic diagram of the cross-sectional structure of the feed funnel and rotating sleeve of the present invention;

[0032] Figure 8 This is a partial cross-sectional structural diagram of the mixing tank of the present invention;

[0033] Figure 9 This is a partial front view schematic diagram of the angle adjustment mechanism of the present invention;

[0034] Figure 10 This is a partial rear view schematic diagram of the angle adjustment mechanism of the present invention;

[0035] Figure 11 This is a schematic diagram of a partial cross-sectional structure of the stirring shaft of the present invention;

[0036] Figure 12 This is a schematic diagram of the left-side cross-sectional structure of the drive rod of the present invention.

[0037] Numbering on the map:

[0038] 1. Support leg; 2. Drying cylinder; 21. Discharge pipe; 22. Electric heating plate; 23. Stirring shaft; 231. Mounting cavity; 232. Slide groove; 24. Stirring blade; 25. Motor; 3. Mixing cylinder; 31. Feed pipe; 311. Protective box; 32. Mounting sleeve; 33. Feed funnel; 34. Rotating shaft; 35. Spiral stirring blade; 36. First stirring rod; 37. Second stirring rod; 38. Third stirring rod; 39. Spreading and diffusion assembly; 391. Turntable; 392. First guide block; 393. Second guide block; 4. Transmission mechanism; 41. Pulley assembly; 42. Transmission rod; 43. First bevel gear; 44. Second bevel gear; 5. Limiting mechanism; 51. Rotating sleeve; 511. First 512. Arc-shaped groove; 52. Guide rod; 53. Material stop cover; 54. Spring; 55. Reduction assembly; 551. Drive shaft; 552. Third bevel gear; 553. Fourth bevel gear; 554. Fifth bevel gear; 555. Sixth bevel gear; 6. Angle adjustment mechanism; 61. Rotating shaft; 611. Worm gear; 62. Worm; 63. Eccentric wheel; 64. Connecting rod; 65. Bracket; 651. First positioning rod; 66. Actuating rod; 661. Limiting groove; 662. Slider; 663. Connecting shaft; 664. Second positioning rod; 67. Connecting ring; 68. Drive assembly; 681. Connecting block; 682. Drive rod; 683. Rack; 684. Gear; 685. Fixed shaft. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] like Figures 1-12 As shown, the present invention has the following three specific embodiments.

[0041] Example 1: An apparatus for preparing dry calcium hydroxide powder from calcium carbide sludge, comprising multiple sets of support legs 1, with a drying cylinder 2 fixedly connected to the upper ends of the multiple sets of support legs 1, a discharge pipe 21 fixedly connected to the lower left side of the drying cylinder 2, a mixing cylinder 3 fixedly connected to the upper right side of the drying cylinder 2 via a support frame, the lower end of the mixing cylinder 3 penetrating into and fixedly connected to the drying cylinder 2, an electric heating plate 22 fixedly connected inside the drying cylinder 2, a stirring shaft 23 rotatably connected inside the drying cylinder 2, multiple sets of stirring blades 24 symmetrically arranged at the front and rear of the stirring shaft 23, a motor 25 fixedly connected to the left end of the drying cylinder 2, and the output shaft end of the motor 25 fixedly connected to the left end of the stirring shaft 23; further comprising:

[0042] Feed pipe 31 is fixedly connected to the side wall of mixing cylinder 3;

[0043] The mounting sleeve 32 is fixedly connected to the upper end of the mixing cylinder 3. The inside of the mounting sleeve 32 is fixedly connected to the feed funnel 33. The lower end of the feed funnel 33 extends into the inside of the mixing cylinder 3 and is coaxially arranged with the mixing cylinder 3.

[0044] A rotating shaft 34 is rotatably connected to the inside of the mixing cylinder 3 via a mounting bracket. The upper end of the rotating shaft 34 extends into the inside of the feed hopper 33. A first stirring rod 36 is fixedly connected to the side wall of the rotating shaft 34 inside the mixing cylinder 3. A second stirring rod 37 and a third stirring rod 38 are fixedly connected to the side wall of the rotating shaft 34 inside the feed hopper 33. The second stirring rod 37 is located above the third stirring rod 38. A material spreading and diffusion component 39 is also provided on the side wall of the rotating shaft 34 inside the mixing cylinder 3.

[0045] Transmission mechanism 4 is installed on the right side of drying cylinder 2;

[0046] Limiting mechanism 5 is installed inside the mixing cylinder 3. Limiting mechanism 5, together with material spreading and diffusion component 39, evenly spreads the material in feed hopper 33 into mixing cylinder 3.

[0047] Angle adjustment mechanism 6 is installed on the right side of the drying cylinder 2. Angle adjustment mechanism 6 is used to adjust the deflection angle of the stirring blade 24.

[0048] A spiral stirring blade 35 is also fixedly connected to the side wall of the rotating shaft 34 located inside the mixing cylinder 3.

[0049] In this embodiment, as Figures 1-4 , Figure 6As shown, firstly, calcium carbide sludge particles are continuously fed into the mixing drum 3 at a constant rate through the feed pipe 31. Additives are added through the feed funnel 33. Then, the motor 25 is started to drive the stirring shaft 23 to rotate. The stirring shaft 23 transmits power to the rotating shaft 34 through the transmission mechanism 4. The second stirring rod 37 and the third stirring rod 38 at the upper end of the rotating shaft 34 initially disperse the additives in the feed funnel 33 to prevent bridging and blockage. After the additives fall into the spreading and diffusion component 39, they are thrown outward under the centrifugal force generated by the high-speed rotation. At the same time, the rotating shaft 34 drives the limiting mechanism 5 through the deceleration component 55 to run, so that the outwardly thrown additives hit the limiting mechanism 5 and fall back into the mixing drum 3, thereby making the additives evenly spread into the mixing drum 3 and meet the calcium carbide sludge particles.

[0050] The spiral stirring blades 35 push and tumble the falling material and additives upwards, and work with the first stirring rod 36 to further shear and mix them in the radial direction, thus achieving the mixing function. The mixed material enters the drying cylinder 2 through the lower outlet of the mixing cylinder 3, and the electric heating plate 22 heats it to the set drying temperature. The stirring blades 24 rotate under the drive of the stirring shaft 23 to stir and tumble the material. While the stirring shaft 23 rotates, it drives the angle adjustment mechanism 6 to work synchronously, so as to realize the real-time adjustment of the tilt angle of the stirring blades 24. The change of tilt angle makes the material propel in the axial direction and tumble in the radial direction. At the same time, the blade edges break up the clumps. After drying, the calcium hydroxide is finally continuously discharged from the discharge pipe 21, realizing continuous, uniform and low-energy production.

[0051] Example 2: The difference from Example 1 is that this example discloses a transmission mechanism 4 for driving the rotating shaft 34 to rotate, a material spreading and diffusion assembly 39 inside the mixing cylinder 3, and a limiting mechanism 5;

[0052] The material spreading and diffusion assembly 39 includes a turntable 391 and a first guide block 392. The turntable 391 is fixedly connected to the side wall of the rotating shaft 34 and is located directly below the discharge port of the feed funnel 33. Multiple first guide blocks 392 are provided and fixedly connected to the upper end of the turntable 391 at equal intervals. A second guide block 393 is provided between adjacent first guide blocks 392, and all second guide blocks 393 are fixedly connected to the upper end of the turntable 391.

[0053] The transmission mechanism 4 includes a transmission rod 42 and a first bevel gear 43. A protective box 311 is fixedly connected to the inner wall of the lower end of the mixing cylinder 3. The transmission rod 42 is rotatably connected inside the protective box 311. The right end of the transmission rod 42 passes through the mixing cylinder 3 and the support frame in sequence and is rotatably connected to both. The right end of the transmission rod 42 is connected to the right end of the stirring shaft 23 through a pulley assembly 41. The first bevel gear 43 is fixedly connected to the left end of the transmission rod 42. A second bevel gear 44 is fixedly connected to the side wall of the rotating shaft 34. The second bevel gear 44 meshes with the first bevel gear 43.

[0054] The limiting mechanism 5 includes a rotating sleeve 51 and a baffle 53. The rotating sleeve 51 is rotatably connected to the outer wall of the mounting sleeve 32. A deceleration assembly 55 is provided at the upper end of the rotating sleeve 51. The rotating sleeve 51 is connected to the rotating shaft 34 through the deceleration assembly 55. The side wall of the rotating sleeve 51 is provided with a first arc groove 511 and a second arc groove 512 at equal intervals. Adjacent first arc grooves 511 are connected through the second arc groove 512. A plurality of guide rods 52 are provided at equal intervals at the upper end of the mixing cylinder 3. The lower end of the guide rod 52 penetrates into the interior of the mixing cylinder 3 and is slidably connected thereto. The baffle 53 is fixedly connected to the lower end of the plurality of guide rods 52. The inner diameter of the baffle 53 decreases from bottom to top and is set in a stepped shape. The upper end of the guide rod 52 is located inside the first arc groove 511 and is slidably connected thereto.

[0055] The upper end of the baffle 53 is rotatably sleeved on the lower side wall of the feed hopper 33, and a spring 54 is fixedly connected to the upper end of the baffle 53. The upper end of the spring 54 is fixedly connected to the top of the inside of the mixing cylinder 3.

[0056] The reduction gear assembly 55 includes a drive shaft 551 and a third bevel gear 552. The drive shaft 551 is rotatably connected to the upper end of the mounting sleeve 32 via a bearing housing. The third bevel gear 552 is fixedly connected to the right end of the drive shaft 551 and meshes with the fourth bevel gear 553, which is fixedly connected to the upper end of the rotating sleeve 51. The left end of the drive shaft 551 is fixedly connected to a fifth bevel gear 554, which meshes with the sixth bevel gear 555, which is fixed to the upper end of the rotating shaft 34. The third bevel gear 552, the fifth bevel gear 554, and the sixth bevel gear 555 are of the same type. The transmission ratio between the fourth bevel gear 553 and the third bevel gear 552 is 60:1.

[0057] In this embodiment, as Figure 2 , Figure 5 , Figures 7-8 As shown, the stirring shaft 23 rotates at a constant speed under the drive of the motor 25. Its right end transmits power synchronously to the transmission rod 42 through the pulley assembly 41. The transmission rod 42 rotates smoothly in the protective box 311. The first bevel gear 43 at its left end meshes with the second bevel gear 44 on the side wall of the rotating shaft 34, so that the rotating shaft 34 rotates uniformly in the mixing cylinder 3 at the same speed as the stirring shaft 23. The upper end of the rotating shaft 34 meshes with the fifth bevel gear 554 through the sixth bevel gear 555, driving the transmission shaft 551 to rotate. The third bevel gear 552 at the right end of the transmission shaft 551 then meshes with the fourth bevel gear 553 at the upper end of the rotating sleeve 51. Because the transmission ratio is 60:1, the rotating sleeve 51 is slowed down and rotates slowly.

[0058] After the additive falls into the center of the turntable 391 through the feed funnel 33, it is accelerated radially along the turntable 391 under the centrifugal force generated by the high-speed rotation of the rotating shaft 34. The first guide block 392 and the second guide block 393 form alternating flow channels on the surface of the turntable 391, so that the additive is evenly divided into multiple fine streams and thrown towards the edge of the turntable 391. At the same time, the low-speed rotation of the rotating sleeve 51 causes the first arc-shaped groove 511 and the second arc-shaped groove 512 to pass through the upper end of the guide rod 52 in sequence. Guided by the grooved track, the guide rod 52 drives the baffle 53 to perform periodic lifting and lowering movements along the axial direction. The spring 54 provides restoring force during the lifting and lowering process to ensure the smooth operation of the baffle 53.

[0059] When the guide rod 52 is at the lowest point of the first arc-shaped groove 511, the baffle 53 descends to near the surface of the turntable 391. The stepped edge of the baffle briefly blocks the thrown additive, forcing it to turn back and disperse further. As the guide rod 52 climbs up the first arc-shaped groove 511 to the highest point, the inner diameter of the baffle 53 gradually decreases from bottom to top, causing the distance between the side wall of the turntable 391 and the inner wall of the baffle 53 to gradually increase. As a result, the additive is thrown further under the action of centrifugal force, allowing the additive to be evenly sprinkled into the mixing cylinder 3 and fully mixed with the carbide sludge particles continuously fed in by the feed pipe 31, achieving uniform mixing without lumps and with low energy consumption.

[0060] Example 3: The difference from Example 2 is that this example discloses an angle adjustment mechanism 6 for adjusting the deflection angle of the stirring blade 24;

[0061] The angle adjustment mechanism 6 includes a worm gear 611 and a worm 62. The worm 62 is fixedly sleeved on the right side wall of the stirring shaft 23. The right end of the drying cylinder 2 is rotatably connected to the rotating shaft 61 via a bearing seat. The worm gear 611 is fixedly connected to the side wall of the rotating shaft 61. The worm 62 meshes with the worm gear 611. Eccentric wheels 63 are fixedly connected to both the front and rear sides of the rotating shaft 61. A connecting rod 64 is rotatably connected to the side wall of the eccentric wheel 63. Supports 65 are symmetrically fixedly connected to the front and rear of the right end of the drying cylinder 2. A first positioning rod 651 is fixedly connected between the ends of the two supports 65. The first positioning rod 651 is positioned at the front... Both sides are rotatably connected to a lever 66, and a second positioning rod 664 is fixedly connected between the two levers 66. The side of the connecting rod 64 away from the eccentric wheel 63 is rotatably connected to the side wall of the second positioning rod 664. A limit groove 661 is opened on the upper front end face of the lever 66. A slider 662 is slidably connected inside the limit groove 661. A connecting shaft 663 is rotatably connected inside the slider 662. A connecting ring 67 is fixedly connected to one adjacent end of the two connecting shafts 663. A drive assembly 68 is provided inside the connecting ring 67. The drive assembly 68 is used to drive the stirring blade 24 to reciprocate.

[0062] The drive assembly 68 includes a connecting block 681 and a drive rod 682. The right end face of the stirring shaft 23 has an installation cavity 231 and a slide groove 232. The slide groove 232 is provided in pairs and is located at the lower rear end and the upper front end of the installation cavity 231, respectively. The installation cavity 231 and the slide groove 232 are interconnected. The drive rod 682 is slidably connected inside the installation cavity 231. Both ends of the installation cavity 231 are equidistantly fixedly connected with racks 683. The racks 683 are located inside the slide groove 232 and are slidably connected thereto. Multiple racks 683 are meshed with gears 684. The end of the gear 684 away from the drive rod 682 is fixedly connected to a fixed shaft 685. The end of the fixed shaft 685 extends through to the outside of the stirring shaft 23 and is rotatably connected thereto. The end of the fixed shaft 685 is fixedly connected to the corresponding stirring blade 24. The connecting block 681 is fixedly connected to the right end of the drive rod 682 and is rotatably sleeved inside the connecting ring 67.

[0063] In this embodiment, as Figures 9-12 As shown, during the continuous rotation of the stirring shaft 23, the worm 62 fixed at its right end rotates synchronously and, after meshing with the worm wheel 611, transmits power to the rotating shaft 61, causing the rotating shaft 61 to rotate smoothly at a speed much lower than that of the stirring shaft 23. The eccentric wheels 63 on both sides of the rotating shaft 61 then make uniform circular motion, which pulls the second positioning rod 664 through the connecting rod 64, causing the actuating rod 66 to oscillate periodically around the first positioning rod 651. When the actuating rod 66 oscillates, the slider 662 in the limiting groove 661 slides back and forth in the groove, driving the connecting shaft 663 and the connecting ring 67 to make linear reciprocating motion along the axis of the stirring shaft 23.

[0064] The connecting ring 67 drives the drive rod 682 to slide synchronously back and forth in the mounting cavity 231 through the connecting block 681; the racks 683 on the front and rear sides of the drive rod 682 mesh with the corresponding gears 684, converting the linear motion into the alternating forward and reverse rotation of the gears 684. The gears 684 drive the stirring blades 24 to deflect in real time within the range of 0°-15° through the fixed shaft 685, forming a composite motion of "propulsion, tumbling and crushing": when the blades have a deflection angle, the material is pushed towards the discharge end, and the material is tumbled at the same time; when the deflection angle of the blades is 0°, the edge of the blades shears and crushes the agglomerates; by reciprocating and adjusting the blade deflection angle, on the one hand, the axial propulsion rate is dynamically changed to prevent material adhesion and eliminate dead zones; on the other hand, an alternating flow field of "propulsion-stagnation" is periodically constructed in the cylinder, so that the material continuously converges and disperses, forming strong transverse shearing and radial tumbling, significantly increasing the frequency of material layer tumbling, thereby improving drying efficiency and shortening drying time, and realizing efficient and low-energy continuous production.

[0065] The working principle of this invention is as follows:

[0066] After the motor 25 is started, the stirring shaft 23 rotates at a constant speed. On the one hand, the rotating shaft 34 is driven to rotate synchronously at high speed through the transmission of the pulley assembly 41, the transmission rod 42, the first bevel gear 43 and the second bevel gear 44; on the other hand, the rotating shaft 61 is driven to rotate at low speed through the worm 62 and the worm wheel 611.

[0067] In the mixing zone, the additive enters through the feed funnel 33 and is dispersed by the second and third stirring rods 38, then falls onto the turntable 391. The turntable 391 rotates at high speed with the rotating shaft 34, and under the guidance of the first guide block 392 and the second guide block 393, the additive is divided into multiple fine streams and thrown outward. At the same time, the sixth bevel gear 555 at the upper end of the rotating shaft 34 drives the fourth bevel gear 553 through the fifth bevel gear 554, the drive shaft 551, and the third bevel gear 552, so that the rotating sleeve 51 rotates slowly at 1 / 60 of the speed. The first and second arc-shaped grooves 512 on the rotating sleeve 51 cooperate with the guide rod 52, so that the baffle 53 is periodically raised and lowered under the cooperation of the spring 54. The gap between the stepped wall of the baffle 53 and the turntable 391 changes continuously with the raising and lowering, so that the additives thrown out by centrifugation are blocked by the wall and forced to turn back and fall downward, so that the additives are evenly scattered in the mixing tank.

[0068] The calcium carbide sludge particles are continuously fed into the mixing cylinder 3 through the feed pipe 31 and meet the additives that are evenly sprinkled. The spiral stirring blade 35 pushes the material upward and drives the calcium carbide sludge and additives inside the mixing cylinder 3 to tumble. At the same time, the first stirring rod 36 provides radial shearing. The two work together to complete the mixing. The mixed material enters the drying cylinder 2 through the bottom outlet of the mixing cylinder 3.

[0069] In the drying zone, the electric heating plate 22 provides a heat source; the stirring blades 24 rotate with the stirring shaft 23 to stir the materials; the worm gear 62 on the stirring shaft 23 drives the worm wheel 611, causing the rotating shaft 61 to rotate at a low speed; the eccentric wheel 63, connecting rod 64, and actuating rod 66 convert the rotational motion into the reciprocating linear motion of the connecting ring 67 along the axis of the stirring shaft 23. The connecting ring 67 drives the drive rod 682 to slide back and forth in the mounting cavity 231 through the connecting block 681. The rack 683 on the drive rod 682 meshes with the gear 684, causing each fixed shaft 685 to drive the stirring blades 24 to reciprocate in real time within the range of 0°-15°.

[0070] • When the blades tilt forward, the material is quickly pushed towards the discharge end and turned over by the blades;

[0071] • When the blade passes the 0° position, the blade edge shears and breaks up the agglomerates;

[0072] The periodic variable-angle motion forms a composite flow field of axial propulsion, radial tumbling and crushing within the drying cylinder 2, which significantly improves heat exchange efficiency, prevents wall adhesion, and ultimately allows calcium hydroxide with a moisture content of ≤2 wt% to be continuously discharged from the discharge pipe 21, achieving efficient, low-energy, and continuous production.

[0073] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. An apparatus for preparing dry powder calcium hydroxide from calcium carbide sludge, comprising multiple sets of support legs (1), characterized in that, A drying cylinder (2) is fixedly connected to the upper ends of multiple sets of support legs (1). A discharge pipe (21) is fixedly connected to the lower left side of the drying cylinder (2). A mixing cylinder (3) is fixedly connected to the upper right side of the drying cylinder (2) via a support frame. The lower end of the mixing cylinder (3) extends into the interior of the drying cylinder (2) and is fixedly connected thereto. An electric heating plate (22) is fixedly connected inside the drying cylinder (2). A stirring shaft (23) is rotatably connected inside the drying cylinder (2). Multiple sets of stirring blades (24) are symmetrically arranged on the front and back of the stirring shaft (23). A motor (25) is fixedly connected to the left end of the drying cylinder (2). The output shaft end of the motor (25) is fixedly connected to the left end of the stirring shaft (23). The drying cylinder (2) also includes: Feed pipe (31), which is fixedly connected to the side wall of mixing cylinder (3); The mounting sleeve (32) is fixedly connected to the upper end of the mixing cylinder (3). The mounting sleeve (32) is fixedly connected to the inside of the mounting sleeve (32). The lower end of the feeding funnel (33) extends into the inside of the mixing cylinder (3) and is coaxially arranged with the mixing cylinder (3). A rotating shaft (34) is rotatably connected to the inside of the mixing cylinder (3) via a mounting bracket. The upper end of the rotating shaft (34) extends into the inside of the feed funnel (33). A first stirring rod (36) is fixedly connected to the side wall of the rotating shaft (34) inside the mixing cylinder (3). A second stirring rod (37) and a third stirring rod (38) are fixedly connected to the side wall of the rotating shaft (34) inside the feed funnel (33). The second stirring rod (37) is located above the third stirring rod (38). A material spreading and diffusion assembly (39) is also provided on the side wall of the rotating shaft (34) inside the mixing cylinder (3). Transmission mechanism (4), which is installed on the right side of the drying cylinder (2); Limiting mechanism (5), the limiting mechanism (5) is installed inside the mixing cylinder (3), the limiting mechanism (5) cooperates with the spreading and diffusion assembly (39) to evenly spread the material in the feeding funnel (33) into the mixing cylinder (3); An angle adjustment mechanism (6) is installed on the right side of the drying cylinder (2) and is used to adjust the deflection angle of the stirring blades (24).

2. The apparatus for preparing dry powder calcium hydroxide from calcium carbide sludge according to claim 1, characterized in that, A spiral stirring blade (35) is also fixedly connected to the side wall of the rotating shaft (34) located inside the mixing cylinder (3).

3. The apparatus for preparing dry powder calcium hydroxide from calcium carbide sludge according to claim 1, characterized in that, The material spreading and diffusion assembly (39) includes a turntable (391) and a first guide block (392). The turntable (391) is fixedly connected to the side wall of the rotating shaft (34). The turntable (391) is located directly below the outlet of the feed funnel (33). Multiple first guide blocks (392) are provided and are fixedly connected at equal intervals to the upper end of the turntable (391). A second guide block (393) is provided between adjacent first guide blocks (392). The second guide blocks (393) are all fixedly connected to the upper end of the turntable (391).

4. The apparatus for preparing dry calcium hydroxide powder from calcium carbide sludge according to claim 1, characterized in that, The transmission mechanism (4) includes a transmission rod (42) and a first bevel gear (43). A protective box (311) is fixedly connected to the inner wall of the lower end of the mixing cylinder (3). The transmission rod (42) is rotatably connected inside the protective box (311). The right end of the transmission rod (42) passes through the mixing cylinder (3) and the support frame in sequence and is rotatably connected to both. The right end of the transmission rod (42) is connected to the right end of the stirring shaft (23) through a pulley assembly (41). The first bevel gear (43) is fixedly connected to the left end of the transmission rod (42). A second bevel gear (44) is fixedly connected to the side wall of the rotating shaft (34). The second bevel gear (44) meshes with the first bevel gear (43).

5. The apparatus for preparing dry calcium hydroxide powder from calcium carbide sludge according to claim 1, characterized in that, The limiting mechanism (5) includes a rotating sleeve (51) and a baffle (53). The rotating sleeve (51) is rotatably connected to the outer wall of the mounting sleeve (32). A speed reduction assembly (55) is provided at the upper end of the rotating sleeve (51). The rotating sleeve (51) is connected to the rotating shaft (34) through the speed reduction assembly (55). The side wall of the rotating sleeve (51) is provided with a first arc-shaped groove (511) and a second arc-shaped groove (512) at equal intervals. The first arc-shaped groove is adjacent to the second arc-shaped groove. (511) The mixing cylinder (3) is connected by a second arc groove (512). Multiple guide rods (52) are equidistantly arranged on the upper end of the mixing cylinder (3). The lower end of the guide rod (52) penetrates into the mixing cylinder (3) and is slidably connected thereto. The baffle (53) is fixedly connected to the lower end of the multiple guide rods (52). The inner diameter of the baffle (53) decreases from bottom to top and is set in a stepped shape. The upper end of the guide rod (52) is located inside the first arc groove (511) and is slidably connected thereto.

6. The apparatus for preparing dry calcium hydroxide powder from calcium carbide sludge according to claim 5, characterized in that, The upper end of the baffle (53) is rotatably sleeved on the lower side wall of the feed funnel (33), and the upper end of the baffle (53) is fixedly connected to a spring (54), the upper end of the spring (54) is fixedly connected to the top of the inside of the mixing cylinder (3).

7. The apparatus for preparing dry calcium hydroxide powder from carbide sludge according to claim 5, characterized in that, The deceleration assembly (55) includes a drive shaft (551) and a third bevel gear (552). The drive shaft (551) is rotatably connected to the upper end of the mounting sleeve (32) via a bearing seat. The third bevel gear (552) is fixedly connected to the right end of the drive shaft (551) and meshes with the fourth bevel gear (553) fixedly connected to the upper end of the rotating sleeve (51). The left end of the drive shaft (551) is fixedly connected to the fifth bevel gear (554). The fifth bevel gear (554) meshes with the sixth bevel gear (555) fixed to the upper end of the rotating shaft (34). The third bevel gear (552), the fifth bevel gear (554), and the sixth bevel gear (555) are of the same type. The transmission ratio between the fourth bevel gear (553) and the third bevel gear (552) is 60:

1.

8. The apparatus for preparing dry calcium hydroxide powder from calcium carbide sludge according to claim 1, characterized in that, The angle adjustment mechanism (6) includes a worm gear (611) and a worm (62). The worm (62) is fixedly sleeved on the right side wall of the stirring shaft (23). The right end of the drying cylinder (2) is rotatably connected to a rotating shaft (61) via a bearing seat. The worm gear (611) is fixedly connected to the side wall of the rotating shaft (61). The worm (62) meshes with the worm gear (611). Eccentric wheels (63) are fixedly connected to both the front and rear sides of the rotating shaft (61). A connecting rod (64) is rotatably connected to the side wall of the eccentric wheel (63). A bracket (65) is symmetrically fixedly connected to the front and rear of the right end of the drying cylinder (2). A first positioning rod (651) is fixedly connected between the ends of the two brackets (65). 651) A lever (66) is rotatably connected to both the front and rear sides. A second positioning rod (664) is fixedly connected between the two levers (66). The side of the connecting rod (64) away from the eccentric wheel (63) is rotatably connected to the side wall of the second positioning rod (664). A limit groove (661) is opened on the upper front end face of the lever (66). A slider (662) is slidably connected inside the limit groove (661). A connecting shaft (663) is rotatably connected inside the slider (662). A connecting ring (67) is fixedly connected to one end of the two connecting shafts (663) adjacent to each other. A drive assembly (68) is provided inside the connecting ring (67). The drive assembly (68) is used to drive the stirring blade (24) to rotate back and forth. The drive assembly (68) includes a connecting block (681) and a drive rod (682). The right end face of the stirring shaft (23) is provided with an installation cavity (231) and a sliding groove (232). The sliding groove (232) is provided in pairs and is located at the lower rear end and the upper front end of the installation cavity (231), respectively. The installation cavity (231) and the sliding groove (232) are interconnected. The drive rod (682) is slidably connected inside the installation cavity (231). The front and rear ends of the installation cavity (231) are fixedly connected with racks (683) at equal intervals. 83) Located inside the chute (232) and slidably connected thereto, multiple racks (683) are meshed with gears (684), and a fixed shaft (685) is fixedly connected to one end of the gear (684) away from the drive rod (682). The end of the fixed shaft (685) extends through to the outside of the stirring shaft (23) and is rotatably connected thereto. The end of the fixed shaft (685) is fixedly connected to the corresponding stirring blade (24). The connecting block (681) is fixedly connected to the right end of the drive rod (682), and the connecting block (681) is rotatably sleeved inside the connecting ring (67).

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