A device and method for preparing shell powder soil conditioner

Abstract

This invention provides a shell powder soil conditioner preparation device and method, comprising a fixed box, a crushing mechanism for crushing shells installed at the top of the fixed box, and a compression mechanism for crushing the crushed shells installed inside the fixed box; pulverizing mechanisms for pulverizing shells symmetrically installed at both ends of the fixed box; a drive mechanism for driving the crushing mechanism, the compression mechanism, and the pulverizing mechanism to operate installed on the side wall of the fixed box, and an air jet mechanism for pushing the shell powder to move and be screened inside the pulverizing mechanism inside the fixed box; the shell powder soil conditioner preparation device and method provided by this invention have the advantages of accelerating shell powder production efficiency and reducing production costs.

Description

Technical Field

[0001] This invention relates to the field of soil conditioner preparation, and more particularly to a shell powder soil conditioner preparation apparatus and method. Background Technology

[0002] Shell powder is rich in elements such as calcium and magnesium, which can improve soil acidity, increase soil pH, enhance soil water retention capacity, reduce water evaporation and loss, and improve drought resistance. Shell powder also helps improve soil aeration and permeability, promotes root development, and enhances crop water absorption. Furthermore, shell powder is rich in organic matter, which can increase soil fertility. In addition, the porous structure of shell powder provides conditions for the adsorption and containment of heavy metals, and the alkaline pH of shell materials can promote the precipitation of heavy metal ions.

[0003] The particle size and specific surface area of ​​shell powder are key factors determining its adsorption of heavy metals. The smaller the particle size of shell powder, the larger its surface area and the stronger its adsorption capacity. However, the surface of shells is hard and irregular in shape, so using a pulverizer to crush shells is ineffective. Moreover, the particle size of crushed shells is usually around 30 mesh. If the particle size of the shell powder is too large, its ability to adsorb heavy metals is weak. Although using a ball mill to crush shells can obtain shell powder of a suitable particle size, the production efficiency is low and the production cost is too high.

[0004] Therefore, it is necessary to provide a new apparatus and method for preparing shell powder soil conditioner to solve the above-mentioned technical problems. Summary of the Invention

[0005] The technical problem solved by this invention is to provide a shell powder soil conditioner preparation device and method that accelerates shell powder production efficiency and reduces production costs.

[0006] To solve the above-mentioned technical problems, the present invention provides a shell powder soil conditioner preparation device comprising: a fixed box, wherein a crushing mechanism for crushing shells is installed at the top of the fixed box, and a compression mechanism for crushing the crushed shells is installed inside the fixed box; the compression mechanism includes a feeding plate, wherein the feeding plate, which has an internal funnel shape, is installed in the center of the fixed box, and two rollers are rotatably connected below the feeding plate, wherein the sidewalls of the rollers are evenly distributed with triangular protrusions; a partition is installed inside the fixed box, and the sidewalls of the partition are arc-shaped; and crushing mechanisms for pulverizing shells are symmetrically installed at both ends of the fixed box, wherein the crushing mechanism includes a grinding plate, and the compression mechanism includes a grinding plate. The grinding plate has multiple grinding chambers with arc-shaped sidewalls inside. A feed trough is located at the bottom of the grinding plate, connecting the grinding chambers to the partition. A connecting groove is located at the top of the grinding plate, and a discharge trough is located at one end of the grinding plate. An arc-shaped filter screen is installed inside the discharge trough. A rotating shaft is rotatably connected inside the grinding plate, and multiple sets of blades are installed on the sidewalls of the rotating shaft, rotatably connected to the interior of the grinding chambers. A drive mechanism for operating the crushing mechanism, the compression mechanism, and the grinding mechanism is installed on the sidewalls of the fixed box, and an air jet mechanism for moving and screening the shell powder inside the grinding mechanism is installed inside the fixed box.

[0007] Preferably, the crushing mechanism includes a crushing box, a hollow cylindrical crushing box is fixedly connected to the center of the surface of the fixed box, multiple reinforcing plates are installed at the connection between the crushing box and the fixed box, and a feed funnel is installed on the surface of the crushing box; a fixed shaft is rotatably connected inside the crushing box, and multiple crushing hammers are fixedly connected to the side wall of the fixed shaft; an arc-shaped screen is slidably connected to the bottom end of the crushing box, and the screen is fixed inside the crushing box by bolts; the width of the crushing box is smaller than the length of the drum.

[0008] Preferably, multiple pressure plates with arc-shaped sidewalls are installed inside one side of the crushing box, and the breaker hammer is slidably connected between two of the pressure plates, with the width of one end of the breaker hammer gradually increasing; the length and thickness of the pressure plates gradually increase from bottom to top, and the distance between adjacent pressure plates gradually increases from top to bottom.

[0009] Preferably, the drive mechanism includes a motor, the motor is mounted on the surface of the fixed box, a mounting plate is fixedly connected to the side wall of the fixed box, and two main gears and four auxiliary gears are rotatably connected inside the mounting plate; one side of the motor, the main gears, the two auxiliary gears, the rotating shaft and the fixed shaft are all fixedly connected to a belt shaft, the belt shafts are connected to each other by a belt, and the other two auxiliary gears mesh with the main gears; a bearing seat is mounted on the side wall of the fixed box, and the fixed shaft is rotatably connected inside the bearing seat.

[0010] Preferably, the main gear is fixedly connected to the side wall of the roller, the two main gears mesh with each other, the two main gears rotate in opposite directions, and the diameter of the main gear is larger than the diameter of the auxiliary gear; on the left side of the fixed box, the roller and the shaft rotate clockwise, and on the right side of the fixed box, the roller and the shaft rotate counterclockwise.

[0011] Preferably, the jetting mechanism includes an air intake pipe fixed to the side wall of the fixed box, and multiple connecting pipes are installed on the side wall of the fixed box; multiple first and second nozzles with arc-shaped side walls are installed inside the grinding plate, the first nozzles are aligned with the feed trough, and the second nozzles are aligned with the filter screen.

[0012] Preferably, the bottom of the feeding trough is inclined, and a discharge funnel is installed at one end of the feeding trough; connecting plates are installed at both ends of the filter screen, the connecting plates are engaged with the interior of the grinding plate, and the width of the filter screen is greater than the width of the feeding trough.

[0013] Preferably, the surface of the partition is inclined, and the distance between the partition and the roller gradually increases from top to bottom.

[0014] Preferably, the width of the crushing chamber gradually decreases from top to bottom, and the vertical distance between the rotating shaft and the bottom surface of the crushing chamber is smaller than the vertical distance between the rotating shaft and the top surface of the crushing chamber; the top of the crushing chamber is inclined to connect to the connecting groove, and the bottom end of the funnel-shaped connecting groove is located above the feeding plate.

[0015] A method for preparing a shell powder soil conditioner specifically includes the following steps:

[0016] Step 1: Connect the device to an external power source, connect the jet mechanism to an external high-pressure blower, and turn on the drive mechanism to operate the crushing mechanism, the compression mechanism, and the pulverizing mechanism;

[0017] Step 2: The shells are fed into the crushing mechanism and continuously hammered and crushed until the shell particle size is less than 0.5 cm. Then they are fed into the compression mechanism and crushed again. The crushed shells undergo a first diversion inside the compression mechanism.

[0018] Step 3: After being diverted, the shell powder is again diverted by the jetting mechanism and blown into the interior of multiple crushing mechanisms. The shell powder is processed and crushed in the crushing mechanism in a small space. Shell powder with a particle size smaller than 80 mesh is screened and discharged from the discharge funnel. Unqualified shell powder is separated inside the crushing mechanism. Shell powder with a large particle size enters the compression mechanism again for crushing. Shell powder with a small particle size is continuously rotated and crushed inside the compression mechanism, thereby accelerating the crushing efficiency.

[0019] Step 4: Collect the shell powder with a particle size of less than 80 mesh discharged from the discharge funnel, and mix the various raw materials to make shell powder soil conditioner; the proportions of the various raw materials in the soil conditioner according to the following mass percentages are as follows: 40-60% shell powder with a particle size of less than 80 mesh, 25-35% biochar, 20-30% organic fertilizer, and 0.3-0.7% microbial inoculant.

[0020] Compared with related technologies, the shell powder soil conditioner preparation device and method provided by the present invention have the following beneficial effects:

[0021] This invention provides a shell powder soil conditioner preparation device and method. During the shell powder preparation process, the crushing mechanism, the compression mechanism, and the pulverizing mechanism sequentially crush the shells by hammering, compressing to reduce their volume, and pulverizing them with blades, continuously reducing the volume of the shells to facilitate the preparation of shell powder. When the crushed shells come into contact with the rotating drums, the shell powder enters between the two drums, and the protrusions on the surface of the drums continuously compress the shells, further crushing them. The crushed shells move in two directions along the arc-shaped partitions on the side plates, diverting the compressed shells and preventing the shell powder from accumulating in one place, thus accelerating the processing of the shell powder. To improve processing efficiency, multiple crushing chambers are provided on one side of the partition. The air jet mechanism further diverts the shell powder on the surface of the partition, allowing the shell powder to be crushed within the multiple crushing chambers, thus accelerating the crushing efficiency. Simultaneously, the small volume of each crushing chamber allows the shell powder to be crushed within a confined space, increasing the contact probability between the blades and the shell powder, thereby further accelerating the crushing efficiency. During the crushing process, shell powder with the correct particle size passes through the filter screen and enters the feed trough, while shell powder with the incorrect particle size is blocked by the filter screen. The air jet mechanism rapidly sprays gas upwards, causing the shell powder to move on the surface of the filter screen. The mechanism allows qualified shell powder to pass through the filter screen and pushes unqualified shell powder upwards along the filter screen into the interior of the crushing chamber, preventing the filter screen from clogging. The width of the crushing chamber gradually decreases from top to bottom, and the vertical distance between the rotating shaft and the bottom surface of the crushing chamber is smaller than the vertical distance between the rotating shaft and the top surface of the crushing chamber, making the bottom space of the crushing chamber small, which facilitates the separation of shell powder after crushing by the blades at the bottom of the crushing chamber. The top of the crushing chamber is inclined to connect to the connecting groove, and the bottom of the funnel-shaped connecting groove is located above the feeding plate. Unqualified shell powder is blown into the top of the crushing chamber by the wind. The grinding chamber features an arc-shaped motion and a large top space. Under centrifugal force, the shell powder separates at the top of the grinding chamber. Larger and heavier shell powder particles experience greater centrifugal force, causing them to slide along the side wall of the grinding chamber and enter the surface of the feed plate through the connecting groove. Some gas is also blown onto the surface of the feed plate through the connecting groove, pushing the shell powder on the surface of the feed plate into the space between the two rollers for crushing. Smaller shell powder particles, due to less centrifugal force, are closer to the rotating blades, causing the blades to rotate this portion of shell powder again inside the grinding chamber for further crushing, facilitating rapid crushing of the shell powder. Attached Figure Description

[0022] Figure 1 A schematic diagram of a preferred embodiment of the shell powder soil conditioner preparation device and method provided by the present invention;

[0023] Figure 2 for Figure 1 The diagram shows the internal structure of the fixed box.

[0024] Figure 3 for Figure 2 The diagram shows an enlarged view of the structure at point A.

[0025] Figure 4 for Figure 2 The diagram shows an enlarged view of the structure at point B.

[0026] Figure 5 for Figure 1 The diagram shows a top view of the internal structure of the crushing chamber.

[0027] Figure 6 for Figure 1 The image shows a side view of the internal structure of the crushing chamber.

[0028] Figure 7 for Figure 1 The diagram shows a top view of the internal structure of the fixed box.

[0029] Figure 8 for Figure 2 The image shows a side view of the internal structure of the pulverizing chamber.

[0030] Figure 9 for Figure 1 The diagram shows the internal structure of the mounting plate.

[0031] The diagram is labeled as follows: 1. Fixed box; 11. Discharge hopper; 2. Drive mechanism; 21. Motor; 22. Belt; 23. Belt shaft; 24. Mounting plate; 25. Bearing seat; 26. Main gear; 27. Secondary gear; 3. Jet mechanism; 31. Air inlet pipe; 32. Connecting pipe; 33. First nozzle; 34. Second nozzle; 4. Crushing mechanism; 41. Crushing box; 42. Feed hopper; 43. Fixed shaft; 44. Reinforcing plate; 45. Breaker hammer; 46. Screen; 47. Pressure plate; 48. Bolt; 5. Compression mechanism; 51. Discharge plate; 52. Roller; 53. Partition plate; 54. Protrusion; 6. Crushing mechanism; 61. Grinding plate; 62. Crushing chamber; 63. Connecting groove; 64. Feed groove; 65. Rotating shaft; 66. Blade; 67. Discharge groove; 68. Filter screen; 69. Connecting plate. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0033] Please see Figures 1-9 , Figure 1 A schematic diagram of a preferred embodiment of the shell powder soil conditioner preparation device and method provided by the present invention; Figure 2 for Figure 1The diagram shows the internal structure of the fixed box. Figure 3 for Figure 2 The diagram shows an enlarged view of the structure at point A. Figure 4 for Figure 2 The diagram shows an enlarged view of the structure at point B. Figure 5 for Figure 1 The diagram shows a top view of the internal structure of the crushing chamber. Figure 6 for Figure 1 The image shows a side view of the internal structure of the crushing chamber. Figure 7 for Figure 1 The diagram shows a top view of the internal structure of the fixed box. Figure 8 for Figure 2 The image shows a side view of the internal structure of the pulverizing chamber. Figure 9 for Figure 1 The diagram shows the internal structure of the mounting plate. The shell powder soil conditioner preparation device includes: a fixed box 1, with a crushing mechanism 4 for crushing shells installed at the top of the fixed box 1. According to claim 1, the crushing mechanism 4 includes a crushing box 41, a hollow cylindrical crushing box 41 fixedly connected at the center of the surface of the fixed box 1, multiple reinforcing plates 44 installed at the connection between the crushing box 41 and the fixed box 1, and a feeding funnel 42 installed on the surface of the crushing box 41; a fixed shaft 43 is rotatably connected inside the crushing box 41. Multiple breaker hammers 45 are fixedly connected to the side wall of the fixed shaft 43; the bottom end of the crushing box 41 is slidably connected to a screen 46 with an arc-shaped side wall, and the screen 46 is fixed inside the crushing box 41 by bolts 48. When the shells enter the interior of the crushing box 41 through the feed funnel 42, the fixed shaft 43 drives the breaker hammers 45 to rotate clockwise continuously and contact the shells. The heavier breaker hammers 45 rotate quickly and break the shells quickly, reducing the volume of the shells. Shells with a particle size of less than 0.5 cm pass through the screen 46 and enter the interior of the fixed box 1.

[0034] Multiple pressure plates 47 with arc-shaped sidewalls are installed inside one side of the crushing box 41. A breaker hammer 45 is slidably connected between two of the pressure plates 47. As the breaker hammer 45 rotates clockwise, it carries seashells between the two pressure plates 47. The distance between adjacent pressure plates 47 gradually increases from top to bottom, resulting in a larger lower distance between the two pressure plates 47. This facilitates the breaker hammer 45 pushing the seashells on the screen 46 upwards into the space between the two pressure plates 47. As the breaker hammer 45 carries the seashells upwards between the pressure plates 47, the length and thickness of the pressure plates 47 change from... The width of the breaker 45 gradually increases from bottom to top, making the gap between the breaker 45 and the pressure plate 47 smaller and smaller. This causes the breaker 45 to rotate, squeeze, and grind the shells between the pressure plate 47 and the breaker 45. The pressure plates 47 gradually move closer to the fixed shaft 43, thus leaving the shells between the breaker 45 and the pressure plate 47. This facilitates the breaker 45 to quickly crush the shell powder. The overlapping area between the breaker 45 and the pressure plate 47 also increases, thereby increasing the crushing area of ​​the shell powder and further accelerating the crushing efficiency of the shell powder.

[0035] The fixed box 1 is equipped with a compression mechanism 5 for crushing shells. The compression mechanism 5 includes a feeding plate 51, which is funnel-shaped inside the fixed box 1. Two rollers 52 are rotatably connected below the feeding plate 51. The sidewalls of the rollers 52 are evenly distributed with triangular protrusions 54. The fixed box 1 is equipped with a partition 53, and the sidewalls of the partition 53 are arc-shaped. The width of the crushing box 41 is smaller than the length of the rollers 52 to facilitate the rollers 52 to quickly squeeze the shells and accelerate the crushing efficiency. The surface of the partition 53 is inclined, and the distance between the partition 53 and the rollers 52 gradually increases from top to bottom. As the broken shell pieces fall downwards onto the surface of the feed plate 51, the shell powder moving downwards along the feed plate 51 comes into contact with the rotating roller 52. The shell powder enters between the two rollers 52, and the protrusions 54 on the surface of the rollers 52 continuously squeeze the shells, crushing them again. The crushed shells move in two directions along the arc-shaped partition 53 on the side plate, diverting the compressed shells. The shells moving downwards on the surface of the partition 53 are squeezed and crushed again by the protrusions 54, further reducing the volume of the shells.

[0036] The fixed box 1 has symmetrically installed crushing mechanisms 6 for crushing seashells at both ends. The crushing mechanism 6 includes a grinding plate 61, which is symmetrically installed at both ends of the fixed box 1. The grinding plate 61 has multiple crushing chambers 62 with arc-shaped sidewalls inside. The bottom end of the grinding plate 61 has a feeding groove 64 for connecting the crushing chambers 62 with the partition plate 53. The top end of the grinding plate 61 has a connecting groove 63, and one end of the grinding plate 61 has a discharge groove 67. The discharge groove 67 has an arc-shaped filter screen 68 installed inside. The grinding plate 61 is rotatably connected to a rotating shaft 65. The sidewall of the rotating shaft 65 is equipped with multiple sets of blades 66, and the blades 66 are rotatably connected to the inside of the crushing chambers 62. The fixed box 1 has an air jet mechanism 3 for pushing the seashell powder to move and screen inside the crushing mechanism 6. The jetting mechanism 3 includes an air inlet pipe 31, which is fixed to the side wall of the fixed box 1, and multiple connecting pipes 32 are installed on the side wall of the fixed box 1. Multiple first nozzles 33 and second nozzles 34 with arc-shaped sidewalls are installed inside the grinding plate 61. The first nozzles 33 are aligned with the feed trough 64, and the second nozzles 34 are aligned with the filter screen 68. When the shell powder on the surface of the partition 53 moves downwards, air is sprayed downwards at an angle through the first nozzles 33, pushing the shell powder on the surface of the partition 53 into the interior of the feed trough 64. The shell powder passes through the feed trough 64... 4. Entering the bottom of the crushing chamber 62, the rotating shaft 65 drives the blade 66 to rotate rapidly inside the crushing chamber 62, thereby quickly crushing the shell powder; a plurality of crushing chambers 62 are provided on one side of the partition 53, and the shell powder on the surface of the partition 53 is diverted again through the first nozzle 33, so that the shell powder is crushed inside the plurality of crushing chambers 62, thereby accelerating the crushing efficiency. At the same time, the volume of the crushing chamber 62 is small, so that the shell powder is crushed in a small space, increasing the contact probability between the blade 66 and the shell powder, thereby further accelerating the crushing efficiency of the shell powder;

[0037] As the blade 66 rotates, it pushes the shell powder to rotate inside the crushing chamber 62. Some of the shell powder comes into contact with the filter screen 68 under centrifugal force. Shell powder with a particle size smaller than 80 mesh penetrates the filter screen 68 and enters the feed trough 64, while shell powder with a particle size larger than 80 mesh is blocked by the filter screen 68. At this time, air is sprayed upwards in an arc shape through the second nozzle 34, causing the shell powder to move on the surface of the filter screen 68. This facilitates the penetration of qualified shell powder through the filter screen 68 and pushes unqualified shell powder upwards along the filter screen 68 into the crushing chamber 62, preventing the filter screen 68 from clogging. The width of the crushing chamber 62 gradually decreases from top to bottom, and the vertical distance between the rotating shaft 65 and the bottom surface of the crushing chamber 62 is smaller than the vertical distance between the rotating shaft 65 and the top surface of the crushing chamber 62. This results in a small space at the bottom of the crushing chamber 62, making it easier for the blade 66 to crush the shell powder at the bottom of the crushing chamber 62 and then separate it. The top of the crushing chamber 62 is inclined and connected to the connecting groove 63, which is funnel-shaped and located above the feeding plate 51. Unqualified shell powder is blown into the top of the crushing chamber 62 by wind and moves in an arc. The top of the crushing chamber 62 has a large space, and the shell powder separates at the top under centrifugal force. Larger and heavier shell powder experiences greater centrifugal force, causing it to slide along the side wall of the crushing chamber 62 and enter the surface of the feeding plate 51 through the connecting groove 63. Some gas is also blown through the connecting groove 63 onto the surface of the feeding plate 51, pushing the shell powder on the surface of the feeding plate 51 into the space between the two rollers 52 for crushing. Smaller shell powder, due to less centrifugal force, is closer to the rotating blade 66, causing the blade 66 to rotate this portion of shell powder again inside the crushing chamber 62 for further crushing, thus facilitating the crushing of the shell powder.

[0038] The bottom of the feeding trough 64 is inclined, and a discharge funnel 11 is installed at one end of the feeding trough 64 in order to discharge qualified shell powder through the discharge funnel 11; both ends of the filter screen 68 are equipped with connecting plates 68, the connecting plates 68 are engaged with the interior of the grinding plate 61, and the width of the filter screen 68 is greater than the width of the feeding trough 64.

[0039] The side wall of the fixed box 1 is equipped with a drive mechanism 2 for driving the crushing mechanism 4, the compression mechanism 5, and the pulverizing mechanism 6. The drive mechanism 2 includes a motor 21. The motor 21 is mounted on the surface of the fixed box 1. A mounting plate 24 is fixedly connected to the side wall of the fixed box 1. Two main gears 26 and four auxiliary gears 27 are rotatably connected inside the mounting plate 24. One side of the motor 21, the main gears 26, the two auxiliary gears 27, the rotating shaft 65, and the fixed shaft 43 are all fixedly connected to a belt shaft 23. The belt shafts 23 are connected to each other by a belt 22. The other two auxiliary gears 27 mesh with the main gears 26. A bearing seat 25 is mounted on the side wall of the fixed box 1. The fixed shaft 43 is rotatably connected inside the bearing seat 25. The side wall of the drum 52 is fixedly connected to the main gears 26. The two main gears 26 mesh with each other. 26. The rotation directions are opposite; on the left side of the fixed box 1, the roller 52 and the rotating shaft 65 rotate clockwise, and on the right side of the fixed box 1, the roller 52 and the rotating shaft 65 rotate counterclockwise; to facilitate the motor 21 to drive the main gear 26 to rotate through the belt shaft 23 and the belt 22, the main gear 26 drives the roller 52 to rotate, and the main gear 26 drives the fixed shaft 43 to rotate through the belt shaft 23 and the belt 22, the main gear 26, the roller 52 and the fixed shaft 43 rotate at the same speed; the diameter of the main gear 26 is larger than the diameter of the secondary gear 27, and when the main gear 26 drives the secondary gear 27 to rotate, the speed of the secondary gear 27 is increased, and the secondary gear 27 drives the rotating shaft 65 to rotate through the belt shaft 23 and the belt 22, so that the rotating shaft 65 drives the blade 66 to rotate rapidly inside the crushing chamber 62.

[0040] A method for preparing a shell powder soil conditioner includes the following steps.

[0041] Step 1: Connect the device to an external power source and connect a high-pressure blower to the air inlet pipe 31 to allow air to continuously and rapidly enter the interior of the air inlet pipe 31. Turn on the motor 21. The motor 21 drives the main gear 26 to rotate via the belt shaft 23 and the belt 22. The main gear 26 drives the drum 52 to rotate, and the main gear 26 also drives the fixed shaft 43 to rotate via the belt shaft 23 and the belt 22. The diameter of the main gear 26 is larger than the diameter of the secondary gear 27. When the main gear 26 drives the secondary gear 27 to rotate, it increases the rotational speed of the secondary gear 27. The secondary gear 27 drives the rotating shaft 65 to rotate via the belt shaft 23 and the belt 22, causing the rotating shaft 65 to drive the blade 66 to rotate rapidly inside the crushing chamber 62, thus enabling the crushing mechanism 4, the compression mechanism 5, and the crushing mechanism 6 to operate.

[0042] Step Two: The seashells are fed into the crushing chamber 41 through the feed funnel 42. The fixed shaft 43 drives the crushing hammer 45 to rotate clockwise continuously, contacting the seashells. The heavier crushing hammer 45 rotates quickly, rapidly crushing the seashells and reducing their volume. Seashells with a particle size of less than 0.5 cm pass through the screen 46 and enter the fixed chamber 1. As the crushing hammer 45 rotates clockwise, it pushes the seashells on the surface of the screen 46 upwards into the space between the two pressure plates 47. As the crushing hammer 45 carries the seashells upwards between the pressure plates 47, it rotates, squeezing and grinding the seashells. The shells between the pressure plate 47 and the breaker hammer 45 accelerate the crushing efficiency of the shell powder; the crushed shells move downwards and fall onto the surface of the feed plate 51. The shell powder moving downwards along the feed plate 51 comes into contact with the rotating roller 52. The shell powder enters between the two rollers 52, and the protrusions 54 on the surface of the rollers 52 continuously squeeze the shells, crushing them again. The crushed shells move in two directions along the arc-shaped partition 53 of the side plate, diverting the compressed shells. The shells moving downwards on the surface of the partition 53 are squeezed and crushed again by the protrusions 54, further reducing the volume of the shells.

[0043] Step 3: The shell powder on the surface of the partition 53 moves downwards. The air ejected from the first nozzle 33 pushes the shell powder on the surface of the partition 53 into the interior of the feeding trough 64. The shell powder enters the bottom of the crushing chamber 62 through the feeding trough 64. The rotating shaft 65 drives the blade 66 to rotate rapidly inside the crushing chamber 62, thereby quickly crushing the shell powder. Multiple crushing chambers 62 are provided on one side of the partition 53. The first nozzle 33 further diverts the shell powder on the surface of the partition 53, allowing the shell powder to be crushed within multiple crushing chambers 62, accelerating the crushing efficiency. Simultaneously, the volume of the crushing chamber 62 is small, allowing the shell powder to be crushed within a small space. The shell powder is pulverized inside the chamber, increasing the contact probability between the blade 66 and the shell powder, thereby further accelerating the pulverization efficiency. When the blade 66 rotates and pushes the shell powder to rotate inside the pulverizing chamber 62, some of the shell powder comes into contact with the filter screen 68 under the action of centrifugal force. Shell powder with a particle size of less than 80 mesh passes through the filter screen 68 and enters the interior of the feed trough 64, while shell powder with a particle size of more than 80 mesh is blocked by the filter screen 68. At this time, the air is sprayed upward in an arc shape through the second nozzle 34, which drives the shell powder to move on the surface of the filter screen 68, making it easier for qualified shell powder to pass through the filter screen 68 and pushing unqualified shell powder upward along the filter screen 68 into the pulverizing chamber 62. The internal structure of the crushing chamber 62 is designed to prevent clogging of the filter screen 68. The width of the crushing chamber 62 gradually decreases from top to bottom, and the vertical distance between the rotating shaft 65 and the bottom surface of the crushing chamber 62 is smaller than the vertical distance between the rotating shaft 65 and the top surface of the crushing chamber 62. This results in a small space at the bottom of the crushing chamber 62, facilitating the separation of the shell powder after crushing by the blades 66 at the bottom of the crushing chamber 62. The top of the crushing chamber 62 is inclined and connected to the connecting groove 63, and the bottom of the funnel-shaped connecting groove 63 is located above the feeding plate 51. Unqualified shell powder is blown into the top of the crushing chamber 62 by wind and undergoes an arc-shaped motion. The large space at the top of the crushing chamber 62 allows the shell powder to be crushed and separated under centrifugal force. The top of the crushing chamber 62 separates, and the large-sized and heavy shell powder is subjected to a large centrifugal force, causing the large-sized shell powder to slide along the side wall of the crushing chamber 62 and enter the surface of the feed plate 51 through the connecting groove 63. At the same time, some gas is blown onto the surface of the feed plate 51 through the connecting groove 63, pushing the shell powder on the surface of the feed plate 51 into the space between the two rollers 52 for crushing. After the shell powder volume is reduced, it re-enters the interior of the crushing chamber 62. Meanwhile, the smaller-sized shell powder is closer to the rotating blade 66 due to the smaller centrifugal force, so the blade 66 drives this part of the shell powder to rotate again inside the crushing chamber 62 for crushing, which facilitates the crushing of the shell powder.

[0044] Step 4: Collect the shell powder with a particle size of less than 80 mesh discharged from the discharge funnel 11, and mix the various raw materials to make a shell powder soil conditioner. The proportions of the various raw materials in the soil conditioner by mass percentage are as follows: 40-60% shell powder with a particle size of less than 80 mesh, 25-35% biochar, 20-30% organic fertilizer, and 0.3-0.7% microbial inoculant. Due to their porous surface structure, shell powder and biochar can adsorb and contain heavy metals in the soil, reducing the heavy metal content in the soil. In addition, shell powder is rich in alkaline components such as calcium carbonate and magnesium carbonate, which can directly neutralize the soil. The soil becomes acidic, increasing the pH value; organic fertilizer increases soil fertility, providing a large amount of nutrients and energy for soil microorganisms, accelerating their reproduction, and improving their activity. It also increases the activity of some enzymes in the soil, which helps the microorganisms inside the microbial agent to reproduce rapidly; soil microorganisms can secrete organic acids, which react with the alkaline components such as calcium carbonate and magnesium carbonate inside the shell powder, accelerating the decomposition efficiency of the shell powder, increasing the calcium and magnesium ions in the soil, stimulating the growth of beneficial microorganisms, inhibiting pathogens, regulating the structure of the soil microbial community, and enhancing the soil's self-purification capacity.

[0045] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A device for preparing shell powder soil conditioner, characterized in that, include: A fixed box (1) is provided, the top of which is equipped with a crushing mechanism (4) for crushing the shells, and the inside of the fixed box (1) is equipped with a compression mechanism (5) for crushing the shell fragments. The compression mechanism (5) includes a feeding plate (51). The feeding plate (51), which has an internal funnel shape, is installed in the center of the fixed box (1). Two rollers (52) are rotatably connected to the bottom of the feeding plate (51). The sidewalls of the rollers (52) are evenly distributed with triangular protrusions (54). The fixed box (1) is equipped with a partition (53), and the sidewalls of the partition (53) are arc-shaped. The fixed box (1) is symmetrically equipped with a crushing mechanism (6) for crushing seashells. The crushing mechanism (6) includes a grinding plate (61). The grinding plate (61) is symmetrically installed at both ends of the fixed box (1). The grinding plate (61) has multiple crushing chambers (62) with arc-shaped sidewalls inside. The bottom end of the grinding plate (61) is provided with a feeding groove (64). The feeding groove (64) is used to connect the crushing chamber (62) and the partition plate (53). The top end of the grinding plate (61) is provided with a connecting groove (63). One end of the grinding plate (61) is provided with a discharge groove (67). The discharge groove (67) is equipped with a filter screen (68) with arc-shaped sidewalls inside. The grinding plate (61) is rotatably connected to a rotating shaft (65). Multiple sets of blades (66) are installed on the sidewall of the rotating shaft (65). The blades (66) are rotatably connected to the inside of the crushing chamber (62). The side wall of the fixed box (1) is equipped with a drive mechanism (2) for driving the crushing mechanism (4), the compression mechanism (5) and the pulverizing mechanism (6) to operate, and the inside of the fixed box (1) is equipped with an air jet mechanism (3) for pushing the shell powder to move and screen inside the pulverizing mechanism (6); The crushing mechanism (4) includes a crushing box (41), which is a hollow cylindrical crushing box (41) fixedly connected to the center of the surface of the fixed box (1). Multiple reinforcing plates (44) are installed at the connection between the crushing box (41) and the fixed box (1), and a feed funnel (42) is installed on the surface of the crushing box (41). A fixed shaft (43) is rotatably connected inside the crushing box (41), and multiple crushing hammers (45) are fixedly connected to the side wall of the fixed shaft (43). A screen with an arc-shaped side wall is slidably connected to the bottom of the crushing box (41). 46), and the screen (46) is fixed inside the crushing box (41) by bolts (48). The width of the crushing box (41) is less than the length of the drum (52). Multiple pressure plates (47) with arc-shaped sidewalls are installed inside one side of the crushing box (41). The breaker hammer (45) is slidably connected between two pressure plates (47), and the width of one end of the breaker hammer (45) gradually increases. The length and thickness of the pressure plate (47) gradually increase from bottom to top, and the distance between adjacent pressure plates (47) gradually increases from top to bottom.

2. The shell powder soil conditioner preparation device according to claim 1, characterized in that, The drive mechanism (2) includes a motor (21). The motor (21) is mounted on the surface of the fixed box (1). A mounting plate (24) is fixedly connected to the side wall of the fixed box (1). Two main gears (26) and four auxiliary gears (27) are rotatably connected inside the mounting plate (24). One side of the motor (21), the main gears (26), the two auxiliary gears (27), the rotating shaft (65), and the fixed shaft (43) are all fixedly connected to a belt shaft (23). The belt shafts (23) are connected to each other by a belt (22). The other two auxiliary gears (27) mesh with the main gears (26). A bearing seat (25) is mounted on the side wall of the fixed box (1). The fixed shaft (43) is rotatably connected inside the bearing seat (25).

3. The shell powder soil conditioner preparation device according to claim 2, characterized in that, The main gear (26) is fixedly connected to the side wall of the roller (52). The two main gears (26) mesh with each other and rotate in opposite directions. The diameter of the main gear (26) is larger than the diameter of the secondary gear (27). On the left side of the fixed box (1), the roller (52) and the rotating shaft (65) rotate clockwise. On the right side of the fixed box (1), the roller (52) and the rotating shaft (65) rotate counterclockwise.

4. The shell powder soil conditioner preparation device according to claim 3, characterized in that, The jetting mechanism (3) includes an air inlet pipe (31), which is fixed to the side wall of the fixed box (1), and multiple connecting pipes (32) are installed on the side wall of the fixed box (1); multiple first nozzles (33) and second nozzles (34) with arc-shaped side walls are installed inside the grinding plate (61), the first nozzles (33) are aligned with the feed trough (64), and the second nozzles (34) are aligned with the filter screen (68).

5. The shell powder soil conditioner preparation device according to claim 4, characterized in that, The bottom of the feeding trough (67) is inclined, and a discharge funnel (11) is installed at one end of the feeding trough (67); both ends of the filter screen (68) are equipped with connecting plates (69), the connecting plates (69) are engaged with the interior of the grinding plate (61), and the width of the filter screen (68) is greater than the width of the feeding trough (67).

6. The shell powder soil conditioner preparation device according to claim 5, characterized in that, The surface of the partition (53) is inclined, and the distance between the partition (53) and the roller (52) gradually increases from top to bottom.

7. The shell powder soil conditioner preparation device according to claim 6, characterized in that, The width of the crushing chamber (62) gradually decreases from top to bottom, and the vertical distance between the rotating shaft (65) and the bottom surface of the crushing chamber (62) is smaller than the vertical distance between the rotating shaft (65) and the top surface of the crushing chamber (62); the top of the crushing chamber (62) is inclined to connect to the connecting groove (63), and the bottom end of the funnel-shaped connecting groove (63) is located above the feeding plate (51).

8. The shell powder soil conditioner preparation device according to claim 7, characterized in that, The present invention includes a method for preparing a shell powder soil conditioner, specifically comprising the following steps: Step 1: Connect the device to an external power source, connect the jet mechanism (3) to an external high-pressure blower, turn on the drive mechanism (2), and make the crushing mechanism (4), the compression mechanism (5) and the pulverizing mechanism (6) operate; Step 2: The shells are continuously hammered and crushed inside the crushing mechanism (4) until the shell particle size is less than 0.5 cm. Then they are crushed again inside the compression mechanism (5). The crushed shells undergo a first diversion inside the compression mechanism (5). Step 3: After being diverted, the shell powder is again diverted by the jetting mechanism (3) and blown into the interior of multiple crushing mechanisms (6). The shell powder is processed and crushed inside the crushing mechanism (6) in a single small space. The shell powder with a particle size of less than 80 mesh is discharged from the discharge funnel (11) after being screened. The unqualified shell powder is separated inside the crushing mechanism (6). The shell powder with a large particle size enters the compression mechanism (5) again for crushing. The shell powder with a small particle size is continuously rotated and crushed inside the compression mechanism (5), thereby accelerating the crushing efficiency. Step 4: Collect the shell powder with a particle size of less than 80 mesh discharged from the discharge funnel (11), and mix the various raw materials to make shell powder soil conditioner; the proportions of the various raw materials in the soil conditioner according to the mass percentage are as follows: 40-60% shell powder with a particle size of less than 80 mesh, 25-35% biochar, 20-30% organic fertilizer, and 0.3-0.7% microbial agent.

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