Preparation of nano calcium carbonate-based lime digestion equipment and method thereof

Abstract

The application discloses a lime digestion equipment based on nano calcium carbonate and a preparation method thereof, relates to the technical field of lime digestion machines, and solves the technical problems of low digestion efficiency, dust raising, environmental pollution caused by dust-containing steam, high-temperature steam, and unreasonable use of water resources in the preparation of nano calcium carbonate, and the like. The lime digestion equipment comprises a bottom plate, a pad block is fixedly connected to one side of the top end of the bottom plate, a digestion mechanism is arranged at the top end of the pad block, and a discharging mechanism is arranged at the top end of the digestion mechanism. The digestion mechanism can efficiently stir the lime stone powder to ensure complete digestion; the discharging mechanism cooperates with the exhaust component, prevents dust, and uses steam to heat the water in the water storage tank, thereby improving the digestion efficiency; meanwhile, the water resource is recycled, the discharging is convenient and controllable, the raw materials are strictly selected and treated, the product quality is comprehensively ensured, the advantages are prominent, and the preparation method selects high-quality lime stone raw materials and processes the lime stone into appropriate particle sizes, thereby ensuring the product quality of the nano calcium carbonate.

Description

Technical Field

[0001] The invention relates to the technical field of lime slaking machines, in particular to lime slaking equipment for preparing nano calcium carbonate and a preparation method thereof. Background Art

[0002] Nano calcium carbonate is also known as ultrafine calcium carbonate. The most mature industry for the application of nano calcium carbonate is the plastics industry. It can improve the rheological properties of plastic masterbatch and enhance its formability. When used as a plastic filler, it has the effect of toughening and reinforcing, increasing the flexural strength and flexural elastic modulus, heat deformation temperature and dimensional stability of plastics, while also giving plastics thermal hysteresis.

[0003] Lime digestion is a crucial step in the nano-calcium carbonate production process. However, traditional lime digestion equipment has many problems. First, it is difficult for traditional equipment to fully mix limestone powder and water, resulting in a slow digestion reaction. At the same time, limestone powder is easily affected by moisture and clumps, and ordinary stirring devices cannot effectively break up the clumps, resulting in an incomplete and uneven digestion process, which affects the quality of the subsequent nano-calcium carbonate product.

[0004] Secondly, when limestone powder is added, a large amount of dust is generated, and dust-containing steam is generated during the digestion reaction of lime and water. Existing equipment lacks effective dust prevention and dust removal measures. These dust and dust-containing steam are easily released to the outside, seriously polluting the working environment and endangering the health of operators.

[0005] Finally, the dust-laden high-temperature steam produced by the digestion reaction is not utilized reasonably and is directly discharged, resulting in energy waste. In addition, the water resources used for dust prevention and removal are usually not recycled, which not only wastes water resources but also may cause additional water flow into the digestion mechanism, affecting the water ratio during limestone powder digestion, thereby affecting the digestion effect. Summary of the Invention

[0006] The object of the present invention is to provide a lime slurrying device for preparing nano calcium carbonate and a preparation method thereof to solve the following technical problems:

[0007] Existing lime digestion equipment has many problems in the preparation of nano-calcium carbonate, including low digestion efficiency, easy dust and dust-containing steam generation causing environmental pollution, and unreasonable use of high-temperature steam and water resources, which affect product quality and preparation efficiency.

[0008] The object of the present invention can be achieved by the following technical solution: a lime digestion device for preparing nano calcium carbonate, comprising a bottom plate, a pad fixed to one side of the top of the bottom plate, a digestion mechanism provided on the top of the pad, and a feeding mechanism provided on the top of the digestion mechanism;

[0009] The transmission mechanism that this invention relates to is that this invention relates to a gear train which is connected to the said gear train by the gear train of the said gear train and the gear train of the said gear train is connected to the gear train of the said gear train by the gear train of the said gear train.

[0010] As a further solution of the present invention, a discharge port is provided at the bottom of the discharge shell away from the digestion cavity, and multiple partitions are evenly distributed on the outside of the stirring blade, and each partition is processed with a crushing edge at one end close to the stirring blade.

[0011] As a further solution of the present invention, the discharge component includes a support seat, the top of the support seat is fixed with a support plate, the inside of the support seat is fixed with an electric telescopic rod, the output end of the electric telescopic rod is fixed with a connecting block, the top of the connecting block is fixed with a first baffle, the support seat is fixed to the other side of the top of the bottom plate, the top of the support plate is fixed to the side of the bottom of the discharge shell close to the digestion chamber, the top of the first baffle is attached to the side of the bottom of the discharge shell away from the digestion chamber, and the top of the first baffle is slidably connected to the bottom of the discharge shell.

[0012] As a further solution of the present invention, the exhaust component includes an exhaust cavity, the bottom end of the exhaust cavity is slidably connected to a sliding rod, the top end of the sliding rod is fixed with a sealing plate, the bottom end of the sliding rod is fixed with a buckle plate, the outer wall of the sliding rod is sleeved with a support spring, and multiple exhaust cavities are evenly distributed at the top of the discharge shell, and each exhaust cavity is connected to the discharge shell.

[0013] As a further solution of the present invention, an inverted bowl-shaped groove is processed on the bottom end of the gusset plate, and two limiting protrusions are fixedly connected to the outer side of the top end of the gusset plate.

[0014] As a further solution of the present invention, the unloading mechanism includes a top plate, the top side of the top plate is fixedly connected to an outer baffle shell, a feed hopper is arranged inside the outer baffle shell, the top of the gap between the outer baffle shell and the feed hopper is fixedly connected to an upper baffle shell, the inner top of the feed hopper is rotatably connected to two second baffles by a pin shaft, and a spring strut is fixed to the outer side of the bottom of each second baffle near the pin shaft, and the bottom ends of multiple spring struts are rotatably connected to support heads, and a dust removal component is provided on the other side of the top of the top plate, the top plate is fixed to the top of the digestion cavity, and the outer sides of multiple support heads are respectively fixed to the four corners of the inner wall of the discharge hopper.

[0015] As a further solution of the present invention, a feed port is provided inside the top plate, and the feed port is respectively communicated with the feed hopper and the digestion chamber, and a water spray port and a receiving port are respectively provided on both sides of the inner wall of the feed hopper. The receiving port is arranged inclined as a whole, and the opening position of the receiving port is slightly lower than the opening position of the water spray port. A wedge-shaped stopper is processed at the bottom end of the gap between the outer baffle shell and the feed hopper, and the side of the wedge-shaped stopper close to the water tank is lower than the other side.

[0016] As a further solution of the present invention, the dust removal component includes a water tank, and the top front end and rear end of the water tank are both connected to a delivery pump through flange threads, and the drain outlet on the side of each delivery pump is connected to a drain pipe through a flange thread, and the top side surfaces of the two drain pipes are connected to a second nozzle through a flange thread, and the side surfaces of the water tank are connected to multiple exhaust pipes through flange threads, the water tank is fixed to the other side of the top of the top plate, and the water tank is connected to the side of the outer baffle shell, the two second nozzles are fixed to the top of one side of the interior of the outer baffle shell, and the nozzles of the two second nozzles are arranged in an inclined state inside the water spray port, and the other ends of the multiple exhaust pipes are respectively connected to the tops of multiple exhaust cavities.

[0017] As a further solution of the present invention, two water inlets connected to an external water source are opened on one side of the top of the water tank near the center, and the bottom of the water tank is connected to the first nozzle through multiple connecting pipes.

[0018] The present invention also provides a method for preparing nano calcium carbonate, comprising the following steps:

[0019] Step 1: Select high-quality limestone as raw material, with a calcium carbonate content of more than 95%. Crush and grind the limestone to make limestone powder so that the subsequent digestion reaction can proceed fully.

[0020] Step 2: The limestone powder prepared in advance is put into the interior of the feed hopper through the upper baffle shell in the feeding mechanism. Under the action of the weight of the limestone powder put into the feed hopper, the two second baffles can be pressed downward, so that the limestone powder is put into the digestion mechanism through the feed hopper. In the process of putting the limestone powder into the digestion mechanism, a large amount of dust will be generated, and when the digestion mechanism digests the limestone powder, a large amount of dust-containing steam will also be generated. At this time, through the cooperation of the delivery pump, the drainage pipe and the second nozzle in the dust removal component , two water curtains can be sprayed out from the two water spray ports on the inner wall of the feed hopper through the second nozzle to enclose the generated dust and dust-containing steam, thereby preventing the dust-containing steam and dust from escaping to the outside of the unloading mechanism, and the sprayed water curtain will flow back to the gap between the outer baffle shell and the feed hopper through the receiving interface, and finally the sprayed water will flow back into the water storage tank through the work of the wedge-shaped block, thereby reusing the dust removal water to avoid waste, and also preventing the sprayed dust removal water from flowing into the digestion mechanism and affecting the water ratio when digesting the limestone powder;

[0021] Step 3: After the limestone powder enters the digestion cavity in the digestion mechanism, the transmission motor starts working to provide power to the two gears. The two gears can drive the transmission shaft to rotate in opposite directions, and while the transmission shaft rotates, the stirring blade and the spiral pusher blade can be driven to rotate together. When the limestone powder enters the digestion cavity, the first nozzle starts to spray digestion water into the digestion cavity. Since the limestone powder is very susceptible to moisture and agglomerates, the mutual cooperation of the stirring blade and the partition plate can break up the agglomerated limestone powder, so that the limestone powder is digested more thoroughly.

[0022] Step 4: During the process of digesting the limestone powder, the dust-laden steam generated inside the digestion cavity will be eliminated by the dust removal component to prevent the powder from escaping. The lime milk being digested in the discharge shell will also generate dust-laden steam, which will be transported to the water storage tank through the exhaust pipe through the exhaust component. While eliminating the dust-laden steam, the steam can also heat the water in the water storage tank, thereby improving the digestion efficiency of the limestone powder.

[0023] Step 5: After the limestone powder is digested, the electric telescopic rod in the discharge component drives the first baffle to slide toward one side of the discharge shell through the connecting block, thereby canceling the enclosure of the discharge port opened at the bottom of the discharge shell, so that the lime milk formed after digestion is discharged from the discharge shell through the discharge port, and the operation of the spiral pusher blade can accelerate the discharge speed, so as to facilitate the subsequent carbonization reaction, thereby preparing the nano calcium carbonate product;

[0024] Step 6: After the digested limestone emulsion enters the external carbonization equipment, carbon dioxide is introduced into it for carbonization reaction to generate calcium carbonate precipitate. After filtering and drying, nano calcium carbonate product can be obtained.

[0025] Beneficial effects of the present invention:

[0026] (1) Efficient digestion and stirring: In the digestion mechanism, the transmission motor drives the two transmission shafts to rotate relative to each other through gears. The stirring blades and spiral pusher blades on the transmission shafts work together, which not only fully mixes the limestone powder with water and accelerates the digestion reaction speed, but also effectively breaks up the agglomerated limestone powder by using the cooperation of the stirring blades and the partition plate, ensuring more thorough and uniform digestion.

[0027] (2) Environmental protection and dust-proof design: The unloading mechanism is equipped with an upper baffle, a second baffle and a dust removal component. When the limestone powder is released, the second baffle blocks the dust. At the same time, the delivery pump in the dust removal component sends the water in the water tank to the second nozzle through the drainage pipe. The sprayed water curtain effectively blocks the dust generated during the release and the dust-containing steam generated during the digestion reaction, preventing the powder from escaping and polluting the external environment.

[0028] (3) Steam utilization and temperature control: The exhaust component of the discharge shell can discharge the dust-laden high-temperature steam and send it to the water storage tank through the exhaust pipe. On the one hand, the water storage tank can remove the dust-laden steam; on the other hand, the high-temperature steam can heat the water in the water storage tank, making the temperature of the water sprayed into the digestion chamber from the first nozzle closer to the suitable temperature for the digestion reaction, thereby improving the digestion efficiency of the limestone powder;

[0029] (4) Recycling of water resources: The water spray port on the inner wall of the feed hopper, the socket, and the wedge-shaped block at the gap between the outer baffle shell and the feed hopper cooperate with each other, so that the water curtain for dust removal sprayed from the second nozzle flows into the gap through the socket, and then is drained back to the water storage tank through the wedge-shaped block, thereby realizing the recycling of dust removal water, reducing water resource waste, and preventing the extra water flow from affecting the water ratio in the digester;

[0030] (5) Convenient discharge: The electric telescopic rod in the discharge component can drive the first baffle to slide, flexibly controlling the opening and closing of the discharge port at the bottom of the discharge shell, thereby achieving precise control of the discharge of the digested lime milk. The spiral pusher blades can accelerate the discharge speed of the lime milk, facilitating the subsequent carbonization reaction to prepare nano-calcium carbonate products. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the connection structure of the lime digestion equipment for preparing nano-calcium carbonate according to the present invention;

[0032] Figure 2 This invention Figure 1 Another isometric diagram of the connection structure;

[0033] Figure 3 This invention Figure 1 A schematic diagram of a front cross-sectional connection structure;

[0034] Figure 4 This invention Figure 1 Schematic diagram of the connection structure of the digestive organs;

[0035] Figure 5 This invention Figure 4 Schematic diagram of the partial cross-section connection structure of the digestive organs;

[0036] Figure 6 This invention Figure 4 A schematic diagram of the front cross-sectional connection structure of the exhaust component;

[0037] Figure 7 This invention Figure 2 Schematic diagram of the connection structure of the middle and lower feeding mechanism;

[0038] Figure 8 This invention Figure 7 A schematic diagram of a front cross-sectional connection structure;

[0039] Figure 9 This invention Figure 7 Schematic diagram of the partial side view cross-section connection structure of the middle feeding mechanism.

[0040] In the figure: 1, bottom plate; 2, pad; 3, digestion mechanism; 301, digestion chamber; 302, discharge shell; 303, motor frame; 304, transmission motor; 305, gear; 306, transmission shaft; 307, stirring blade; 308, spiral push blade; 309, partition plate; 310, first nozzle; 311, discharge member; 3111, support base; 3112, support plate; 3113, electric telescopic rod; 3114, connecting block; 3115, first baffle; 312, exhaust Components; 3121, exhaust chamber; 3122, slide rod; 3123, sealing plate; 3124, buckle plate; 3125, support spring; 4, unloading mechanism; 401, top plate; 402, outer baffle shell; 403, feed hopper; 404, upper baffle shell; 405, second baffle; 406, spring support rod; 407, support head; 408, dust removal component; 4081, water tank; 4082, delivery pump; 4083, drain pipe; 4084, second nozzle; 4085, exhaust pipe. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] For example 1, please refer to Figures 1-6 As shown, the present invention is a lime digestion device for preparing nano-calcium carbonate, comprising a base plate 1, the base plate 1 being used to support a pad 2 and a discharge member 311 in a digestion mechanism 3, a pad 2 being fixed to one side of the top of the base plate 1, the pad 2 being used to fix the digestion mechanism 3 and being able to prop up the digestion cavity 301 so as to maintain a certain distance between the pad 2 and the base plate 1, a digestion mechanism 3 being provided on the top of the pad 2, the digestion mechanism 3 being used to digest quicklime so as to react with water to form a calcium hydroxide emulsion, a discharge mechanism 4 being provided on the top of the digestion mechanism 3, the discharge mechanism 4 being used to feed lime into the digestion mechanism 3, and being able to eliminate dust generated when feeding lime and dust-containing steam generated when the lime and water digestion reaction occur, thereby preventing dust from escaping and polluting the external working environment;

[0043] The digestion mechanism 3 includes a digestion chamber 301, and a discharge shell 302 is fixed to one side of the digestion chamber 301. The digestion chamber 301 and the discharge shell 302 are both used for digesting lime and can support the transmission shaft 306 so that the transmission shaft 306 can rotate inside the digestion chamber 301 and the discharge shell 302. The other side of the digestion chamber 301 is threadedly connected to a motor frame 303 by bolts. The motor frame 303 is used to support a transmission motor 304 and two gears 305. The rear end of one side of the motor frame 303 is threadedly connected to the transmission motor 304 by a flange. The transmission motor 304 is used to provide power to the gear 305. The other side of the motor frame 303 is rotatably connected to two gears 305. The two gears 305 are used to rotate. The two transmission shafts 306 connected thereto are driven to rotate, and the two transmission shafts 306 can be rotated in opposite directions through the mutual transmission of the two gears 305. The internal rotation of the digestion chamber 301 and the discharge shell 302 is connected to two transmission shafts 306. The transmission shaft 306 is used to drive the stirring blades 307 and the spiral pusher blades 308 to rotate, so that the limestone powder and water entering the digestion chamber 301 can be stirred. The outer walls of the two transmission shafts 306 located inside the digestion chamber 301 are evenly fixed with a plurality of stirring blades 307, and the outer walls of the two transmission shafts 306 located inside the discharge shell 302 are fixed with spiral pusher blades 308. The stirring blades 307 and the spiral pusher blades 308 are all fixed with The digestion reaction speed of the limestone powder is accelerated, and the stirring blade 307 can break up the limestone that has been agglomerated by cooperating with the partition plate 309, so that the limestone powder can be digested more thoroughly, and the two spiral pushing blades 308 are twisted together, which can stir the lime milk and accelerate the discharge speed of the digested lime milk when it needs to be discharged after the digestion reaction is completed. The front and rear ends of the interior of the digestion chamber 301 are evenly fixed with multiple partition plates 309. The partition plates 309 can break up the limestone powder that has been agglomerated by cooperating with the stirring blade 307, so that the limestone powder can be digested more thoroughly. The front and rear ends of the inner wall of the digestion chamber 301 are evenly fixed with multiple partition plates 309. The first nozzle 310 is used to spray water for digestion reaction into the digestion chamber 301. A discharge component 311 is provided at the bottom of the discharge shell 302. The discharge component 311 is used to enclose the discharge port opened at the bottom end of the discharge shell 302. A plurality of exhaust components 312 are evenly provided on the top of the discharge shell 302. The exhaust components 312 are used to discharge the high-temperature steam generated in the discharge shell 302. The digestion chamber 301 is fixedly connected to the top of the pad 2. The digestion chamber 301 and the discharge shell 302 are connected. The output shaft on the side of the transmission motor 304 is fixedly connected to the gear 305 located at the rear end of the other side of the motor frame 303. The other side of the two gears 305 is fixedly connected to one end of the two transmission shafts 306.

[0044] In this embodiment, preferably, a discharge port is provided on the side of the bottom of the discharge shell 302 away from the digestion chamber 301, and the discharge port is used to discharge the lime milk that has completed the digestion reaction from the inside of the discharge shell 302. A plurality of partition plates 309 are evenly distributed on the outside of the stirring blade 307, and each partition plate 309 is processed with a crushing edge at one end close to the stirring blade 307. By processing the edge at the end of the partition plate 309 close to the stirring blade 307, the crushing effect of the agglomerated limestone powder can be improved, and the agglomerated limestone powder can be more easily broken up.

[0045] In this embodiment, preferably, the discharge member 311 includes a support seat 3111, the support seat 3111 is used to support the support plate 3112, the top of the support seat 3111 is fixedly connected to the support plate 3112, the support plate 3112 is used to support the bottom side of the discharge shell 302, the interior of the support seat 3111 is fixedly connected to an electric telescopic rod 3113, the electric telescopic rod 3113 is used to drive the connecting block 3114 to move, the output end of the electric telescopic rod 3113 is fixedly connected to the connecting block 3114, the connecting block 3114 is used to The first baffle 3115 is driven to move. The top of the connecting block 3114 is fixed with the first baffle 3115. The first baffle 3115 is used to enclose the discharge port. The support seat 3111 is fixed to the other side of the top of the bottom plate 1. The top of the support plate 3112 is fixed to the bottom of the discharge shell 302 close to the digestion chamber 301. The top of the first baffle 3115 is attached to the side of the bottom of the discharge shell 302 away from the digestion chamber 301, and the top of the first baffle 3115 is slidably connected to the bottom of the discharge shell 302.

[0046] In this embodiment, preferably, the exhaust component 312 includes an exhaust cavity 3121, and a sliding rod 3122 is slidably connected to the bottom end of the exhaust cavity 3121. The sliding rod 3122 is used to support the sealing plate 3123 and the pinch plate 3124, and can drive the sealing plate 3123 and the pinch plate 3124 to slide inside the exhaust cavity 3121. The top end of the sliding rod 3122 is fixedly connected to the sealing plate 3123. The sealing plate 3123 is used to seal the bottom end of the exhaust cavity 3121. The bottom end of the sliding rod 3122 is fixedly connected to the pinch plate 3124. The gusset plate 3124 is used to drive the slide bar 3122 to move. When high-temperature steam is generated inside the discharge shell 302, the gusset plate 3124 can be pushed up. When the gusset plate 3124 moves upward, it can drive the sealing plate 3123 to separate from the inner bottom end of the exhaust chamber 3121, so that the dust-laden high-temperature steam passes through the exhaust chamber 3121 into the exhaust pipe 4085. The outer wall of the slide bar 3122 is sleeved with a support spring 3125. The support spring 3125 is used to reset the slide bar 3122. When the slide bar 3122 slides upward, it will The support spring 3125 is exerted with an upward squeezing force, thereby causing the support spring 3125 to produce elastic deformation. When the internal pressure of the discharge shell 302 is insufficient, the rebound force generated by the support spring 3125 when it is forced to shrink can restore the slide bar 3122 to its original position, so that the sealing plate 3123 is re-fastened to the inner bottom end of the exhaust cavity 3121, and the exhaust cavity 3121 is re-sealed. A plurality of exhaust cavities 3121 are evenly distributed on the top of the discharge shell 302, and each exhaust cavity 3121 is connected to the discharge shell 302, and the fastening An inverted bowl-shaped groove is processed at the bottom end of the plate 3124. The groove opened at the bottom end of the buckle plate 3124 can improve the reaction sensitivity of the buckle plate 3124. When the gas pressure inside the discharge shell 302 becomes higher, the buckle plate 3124 can be driven to move upward more sensitively, and two limiting protrusions are fixed to the outer side of the top end of the buckle plate 3124. The limiting protrusions are used to limit the movement stroke of the buckle plate 3124 to prevent the buckle plate 3124 from being completely attached to the bottom end of the exhaust chamber 3121, which will result in the dust-laden steam inside the discharge shell 302 not being discharged.

[0047] In summary, when the digestion mechanism 3 performs a digestion operation on the limestone powder, the limestone powder prepared in advance is fed into the digestion chamber 301 through the feeding mechanism 4, and the first nozzle 310 feeds digestion water of corresponding proportion according to the amount of limestone powder fed into the digestion chamber 301. At this time, the transmission motor 304 provides power to the gear 305. Through the mutual cooperation of the two gears 305, the two transmission shafts 306 can be driven to rotate in opposite directions. When the transmission shaft 306 rotates, the stirring blade 307 and the spiral pushing blade 308 fixedly connected to the outer wall thereof will be driven to rotate together, so that the limestone powder and the water are fully mixed, and the digestion reaction effect of the limestone powder is improved. In addition, through the mutual cooperation of the stirring blade 307 and the partition plate 309, the limestone can be mixed in the process of the rotation of the stirring blade 307. The limestone powder that has been agglomerated in the powder is crushed and broken up so that it can react more evenly with water for digestion. In the process of digesting the limestone powder, a large amount of dust-laden high-temperature steam will be generated. The dust-laden steam inside the digestion chamber 301 will escape into the unloading mechanism 4. The dust in the dust-laden steam can be eliminated through the operation of the dust removal component 408. The dust-laden steam inside the discharge shell 302 will be discharged from the discharge shell 302 through the exhaust component 312, and transported to the dust removal component 408 through the operation of the exhaust pipe 4085. While the dust-laden high-temperature steam can be removed from the dust-laden high-temperature steam, after the high-temperature steam enters the water tank 4081, it can also heat the water in the water tank 4081, so that the water sprayed from the first nozzle 310 is more suitable for digesting the limestone powder.

[0048] For example 2, please refer to Figure 1 、 Figure 2 and Figure 7-Figure 9As shown, on the basis of embodiment 1, the unloading mechanism 4 includes a top plate 401, which is used to support the outer baffle shell 402, the feed hopper 403 and the dust removal component 408. The outer baffle shell 402 is fixedly connected to one side of the top of the top plate 401. The outer baffle shell 402 is used to enclose the feed hopper 403 and can fix the upper baffle shell 404. The inner part of the outer baffle shell 402 is provided with a feed hopper 403, which is connected to the digestion cavity 301 and supports the second baffle 405. The upper baffle shell 404 is fixedly connected to the top of the gap between the outer baffle shell 402 and the feed hopper 403. The inner top of the feed hopper 403 is rotatably connected to two second baffles 405 by a pin shaft. The upper baffle shell 404 and the two second baffles 405 are both used to enclose the limestone powder to be put into the feed hopper 403, which can reduce the pressure when putting lime. The stone powder makes the generated dust escape. A spring strut 406 is fixed to the outer side of the bottom of each second baffle 405 near the pin shaft. The spring strut 406 is used to support the second baffle 405 so that it can close again after discharging the limestone powder at its top. The bottom ends of multiple spring struts 406 are rotatably connected to support heads 407. The support heads 407 are used to support the bottom ends of the spring struts 406. A dust removal component 408 is provided on the other side of the top of the top plate 401. The dust removal component 408 is used to eliminate the dust generated in the process of adding limestone powder and the dust in the dust-containing steam generated during the digestion reaction of the limestone powder, so as to prevent fine limestone powder from escaping from the unloading mechanism 4. The top plate 401 is fixed to the top of the digestion chamber 301, and the outer sides of multiple support heads 407 are respectively fixed to the four corners of the inner wall of the discharge hopper.

[0049] In this embodiment, preferably, a feed port is provided inside the top plate 401, and the feed port is respectively connected to the feed hopper 403 and the digestion chamber 301, and a water spray port and a receiving port are respectively provided on both sides of the inner wall of the feed hopper 403. The receiving port is arranged inclined as a whole, and the opening position of the receiving port is slightly lower than the opening position of the water spray port. A wedge-shaped block is processed at the bottom end of the gap between the outer baffle shell 402 and the feed hopper 403, and the side of the wedge-shaped block close to the water tank 4081 is lower than the other side. Through the mutual cooperation of the water spray port, the receiving port and the wedge-shaped block, when the second nozzle 4084 sprays a water curtain into the feed hopper 403, the sprayed water curtain is sprayed out from the water spray port and sprayed into the inside of the receiving port. Through the enclosure of the wedge-shaped block, the sprayed water can finally return to the inside of the water tank 4081, thereby continuously using the dust removal water and reducing water loss.

[0050] In this embodiment, preferably, the dust removal component 408 includes a water tank 4081, which is used to store water. The top front end and the rear end of the water tank 4081 are both connected to a delivery pump 4082 through a flange thread. The delivery pump 4082 is used to pump the water inside the water tank 4081 into a drain pipe 4083. The drain outlet on the side of each delivery pump 4082 is connected to a drain pipe 4083 through a flange thread. The drain pipe 4083 is used to deliver water to the second nozzle 4084. The top side surfaces of the two drain pipes 4083 are both connected to a second nozzle 4084 through a flange thread. The second nozzle 4084 is used to spray the water and make it The sprayed water forms a water curtain, which can eliminate the scattered limestone powder. The side of the water tank 4081 is threaded with multiple exhaust pipes 4085 through a flange. The exhaust pipes 4085 are used to connect the water tank 4081 with the exhaust component 312. The water tank 4081 is fixed to the other side of the top of the top plate 401, and the water tank 4081 is connected to the side of the outer baffle 402. The two second nozzles 4084 are fixed to the top of one side of the interior of the outer baffle 402, and the nozzles of the two second nozzles 4084 are arranged in an inclined state inside the water spray port. The other ends of the multiple exhaust pipes 4085 are respectively connected to the tops of the multiple exhaust cavities 3121.

[0051] In this embodiment, preferably, two water supply ports connected to the external water source are opened on one side of the top of the water tank 4081 near the center, and the bottom of the water tank 4081 is connected to the first nozzle 310 through multiple connecting pipes. Through the operation of the water supply port, digestion water can be replenished to the inside of the water tank 4081 at any time.

[0052] In summary, when the limestone powder is digested, the limestone powder prepared in advance is put into the feed hopper 403 through the upper enclosure shell 404 in the unloading mechanism 4. When the limestone powder is put in, the limestone powder will squeeze the second baffle 405, causing the second baffle 405 to open downward, so that the limestone powder can fall into the feed hopper 403. While the limestone powder is being put in, the delivery pump 4082 in the dust removal component 408 starts working at the same time, and the water in the water tank 4081 can be pumped into the second nozzle 4084 through the drain pipe 4083, and sprayed out through the second nozzle 4084 to form a water curtain. The dust generated when the limestone powder is added and the powder in the dust-containing high-temperature steam generated when the limestone powder is digested are enclosed to prevent the limestone powder from escaping and polluting the external environment. At the same time, the dust-containing steam discharged from the exhaust component 312 will also enter the water tank 4081 through the exhaust pipe 4085, and the high-temperature steam discharged into the water tank 4081 will heat the water in the water tank 4081 to make it more suitable for the digestion reaction temperature of the limestone powder. Therefore, after the water is sprayed into the digestion cavity 301 through the first nozzle 310, the digestion reaction efficiency of the limestone powder can be accelerated.

[0053] For example three, please refer to Figures 1-9 As shown, by combining Example 1 and Example 2, this embodiment is obtained. When the digestion mechanism 3 is working, the limestone powder prepared in advance is fed into the digestion chamber 301 through the feeding mechanism 4. At this time, the first nozzle 310 on the inner wall of the digestion chamber 301 sprays the digestion water in a corresponding ratio according to the amount of limestone powder fed. Next, the transmission motor 304 is started, and its power is output to the gear 305 at the rear end of the other side of the motor frame 303. Through the cooperation of the two gears 305, the two transmission shafts 306 are driven to rotate in opposite directions. During the rotation of the transmission shaft 306, the stirring blade 307 and the spiral pusher blade 308 fixed to its outer wall are driven to rotate together, so that the limestone powder and water are fully mixed and the digestion reaction is accelerated. At the same time, the stirring blade 307 cooperates with the partition plate 309 evenly fixed inside the digestion chamber 301. When the stirring blade 307 rotates, the part of the limestone powder that is agglomerated is broken up and dispersed, ensuring that the limestone powder is digested more evenly and thoroughly.

[0054] During the limestone powder digestion process, a large amount of dust-laden, high-temperature steam is generated. The dust-laden steam inside the digestion chamber 301 will escape to the discharge mechanism 4, where the dust removal component 408 can remove dust from it. The dust-laden steam inside the discharge shell 302 will be discharged through the exhaust component 312. The buckle plate 3124 in the exhaust component 312 moves upward under the pressure of the high-temperature steam inside the discharge shell 302, driving the slide bar 3122 and the sealing plate 3123 at the top to move upward, allowing the dust-laden, high-temperature steam to enter the exhaust pipe 4085 through the exhaust chamber 3121 and then be transported to the dust removal component 408. In addition, after the high-temperature steam enters the water tank 4081, it can heat the water therein, making the water sprayed from the first nozzle 310 more suitable for limestone powder digestion.

[0055] As for the feeding mechanism 4, when the limestone powder is dropped from the upper enclosure 404 into the feed hopper 403, the powder presses against the second baffle 405, which is pivotally connected to the top of the feed hopper 403 via a pin, causing it to open downward, allowing the powder to fall into the feed hopper 403. Simultaneously, the delivery pump 4082 in the dust removal component 408 starts operating, pumping water from the water tank 4081 through the drain pipe 4083 to the second nozzle 4084. The second nozzle 4084 is tilted and positioned within the water outlet on the inner wall of the feed hopper 403. The sprayed water forms a water curtain, blocking the dust generated by the addition of the limestone powder and the powder in the dust-laden high-temperature steam generated during the digestion reaction, preventing them from escaping and polluting the external environment. Furthermore, the dust-laden steam exhausted from the exhaust assembly 312 enters the water tank 4081 through the exhaust pipe 4085. The high-temperature steam heats the water in the water tank 4081, bringing it to a temperature more conducive to the limestone powder digestion reaction. This water is then sprayed into the digestion chamber 301 by the first nozzle 310, accelerating the efficiency of the digestion reaction. A water inlet is located near the center of the top of the water tank 4081, allowing for the replenishment of digestion water at any time. The bottom of the water tank 4081 is connected to the first nozzle 310 via multiple connecting pipes. During discharge, the electric telescopic rod 3113 in the discharge assembly 311 moves, driving the connecting block 3114 and the first baffle 3115 at the top to open or close the discharge port at the bottom of the discharge housing 302, thereby controlling the discharge of the digested lime milk.

[0056] For example 4, please refer to Figures 1-9 As shown, the present invention also provides a method for preparing nano calcium carbonate, comprising the following steps:

[0057] Step 1: Select high-quality limestone as raw material, generally requiring a calcium carbonate content of more than 95%, while minimizing the content of impurities such as magnesium oxide, silicon, and iron. Crush and grind the limestone to produce limestone powder of appropriate particle size so that the subsequent digestion reaction can proceed fully.

[0058] Step 2: The limestone powder prepared in advance is put into the interior of the feed hopper 403 through the upper enclosure shell 404 in the unloading mechanism 4. Under the action of the weight of the limestone powder put into the feed hopper 403, the two second baffles 405 can be pressed downward, so that the limestone powder is put into the digestion mechanism 3 through the feed hopper 403. In the process of putting the limestone powder into the digestion mechanism 3, a large amount of dust will be generated, and when the digestion mechanism 3 digests the limestone powder, a large amount of dust-containing steam will also be generated. At this time, through the delivery pump 4082, the drainage pipe 4083 and the second nozzle 4 in the dust removal component 408 084 cooperate with each other, and can spray two water curtains from the two water spray ports opened on the inner wall of the feed hopper 403 through the second nozzle 4084, so as to enclose the generated dust and dust-containing steam, and prevent the dust-containing steam and dust from escaping to the outside of the unloading mechanism 4, and the sprayed water curtain will flow back to the gap between the outer baffle 402 and the feed hopper 403 through the receiving interface, and finally, through the work of the wedge-shaped block, the sprayed water will flow back into the water storage tank 4081, so that the dust-removing water can be reused to avoid waste, and the sprayed dust-removing water can be prevented from flowing into the digestion mechanism 3, affecting the water ratio when digesting the limestone powder;

[0059] Step 3: After the limestone powder enters the digestion cavity 301 in the digestion mechanism 3, the transmission motor 304 starts working and provides power to the two gears 305. The transmission through the two gears 305 can drive the transmission shaft 306 to rotate in opposite directions, and while the transmission shaft 306 rotates, it can drive the stirring blade 307 and the spiral pusher blade 308 to rotate together. When the limestone powder enters the digestion cavity 301, the first nozzle 310 starts to spray digestion water into the digestion cavity 301. Since the limestone powder is very easy to get damp and clump, the mutual cooperation of the stirring blade 307 and the partition plate 309 can break up the limestone powder that has been agglomerated, so that the limestone powder can be digested more thoroughly.

[0060] Step 4: During the process of digesting the limestone powder, the dust-laden steam generated inside the digestion chamber 301 will be eliminated by the dust removal component 408 to prevent the powder from escaping. The lime milk being digested in the discharge shell 302 will also generate dust-laden steam, which will be transported to the water storage tank 4081 through the exhaust pipe 4085 by the exhaust component 312. While eliminating the dust-laden steam, the steam can also heat the water in the water storage tank 4081, making the temperature of the water put into the digestion chamber 301 closer to the temperature of the digestion reaction, thereby improving the digestion efficiency of the limestone powder.

[0061] Step 5: After the limestone powder is digested, the electric telescopic rod 3113 in the discharge member 311 drives the first baffle 3115 to slide toward one side of the discharge shell 302 through the connecting block 3114, thereby removing the enclosure of the discharge port opened at the bottom of the discharge shell 302, allowing the lime milk formed after digestion to be discharged from the discharge shell 302 through the discharge port. The operation of the spiral pusher blade 308 can accelerate the discharge speed, thereby facilitating the subsequent carbonization reaction, thereby preparing the nano-calcium carbonate product;

[0062] Step 6: After the digested limestone emulsion enters the external carbonization equipment, carbon dioxide is introduced into it for carbonization reaction to generate calcium carbonate precipitate. After filtering and drying, nano calcium carbonate product can be obtained.

[0063] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A lime digestion device for preparing nano-calcium carbonate, comprising a bottom plate, a pad being fixedly connected to one side of the top of the bottom plate, characterized in that: A digestion mechanism is provided at the top of the pad, and a feeding mechanism is provided at the top of the digestion mechanism; The transmission mechanism that this invention relates to is that this invention relates to a gear train which is connected to the said gear train by the gear train of the said gear train and the gear train of the said gear train is connected to the gear train of the said gear train by the gear train of the said gear train. A discharge port is provided on the bottom of the discharge shell away from the digestion cavity. A plurality of partition plates are evenly distributed on the outside of the stirring blade, and a crushing edge is processed on one end of each partition plate close to the stirring blade. The unloading mechanism includes a top plate, one side of the top end of the top plate is fixedly connected to an outer baffle shell, a feed hopper is arranged inside the outer baffle shell, an upper baffle shell is fixedly connected to the top end of the gap between the outer baffle shell and the feed hopper, the inner top end of the feed hopper is rotatably connected to two second baffles by a pin shaft, a spring strut is fixedly connected to the outer side of the bottom of each second baffle near the pin shaft, the bottom ends of multiple spring struts are rotatably connected to support heads, a dust removal component is provided on the other side of the top end of the top plate, the top plate is fixedly connected to the top end of the digestion cavity, and the outer sides of multiple support heads are respectively fixedly connected to the four corners of the inner wall of the discharge hopper; A feed port is provided inside the top plate, and the feed port is respectively communicated with the feed hopper and the digestion chamber; a water spray port and a receiving port are respectively provided on both sides of the inner wall of the feed hopper; the receiving port is arranged in an inclined manner as a whole, and the opening position of the receiving port is lower than the opening position of the water spray port; a wedge-shaped stopper is processed at the bottom end of the gap between the outer baffle shell and the feed hopper, and the side of the wedge-shaped stopper close to the water tank is lower than the other side.

2. The lime slaking device for preparing nano calcium carbonate according to claim 1, wherein: The discharge component includes a support seat, the top of the support seat is fixedly connected to a support plate, the interior of the support seat is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to a connecting block, the top of the connecting block is fixedly connected to a first baffle, the support seat is fixed to the other side of the top of the bottom plate, the top of the support plate is fixed to the side of the bottom of the discharge shell close to the digestion chamber, the top of the first baffle is attached to the side of the bottom of the discharge shell away from the digestion chamber, and the top of the first baffle is slidably connected to the bottom of the discharge shell.

3. The lime slaking device for preparing nano calcium carbonate according to claim 1, wherein: The exhaust component includes an exhaust cavity, a sliding rod is slidably connected to the bottom end of the exhaust cavity, a sealing plate is fixed to the top end of the sliding rod, a buckle plate is fixed to the bottom end of the sliding rod, and a support spring is sleeved on the outer wall of the sliding rod. Multiple exhaust cavities are evenly distributed at the top end of the discharge shell, and each exhaust cavity is connected to the discharge shell.

4. The lime saturation equipment for preparing nano calcium carbonate according to claim 3, wherein: The bottom end of the gusset plate is processed with an inverted bowl-shaped groove, and two limiting protrusions are fixedly connected to the outer side of the top end of the gusset plate.

5. The lime slaking device for preparing nano calcium carbonate according to claim 1, wherein: The dust removal component includes a water tank, and the top front end and rear end of the water tank are both connected to a delivery pump through flange threads, and the drain outlet on the side of each delivery pump is connected to a drain pipe through a flange thread, and the top side surfaces of the two drain pipes are connected to a second nozzle through a flange thread, and the side surfaces of the water tank are connected to multiple exhaust pipes through flange threads, the water tank is fixedly connected to the other side of the top of the top plate, and the water tank is connected to the side of the outer baffle shell, the two second nozzles are fixedly connected to the top of one side of the interior of the outer baffle shell, and the nozzles of the two second nozzles are arranged in an inclined state inside the water spray port, and the other ends of the multiple exhaust pipes are respectively connected to the tops of the multiple exhaust cavities.

6. The lime slaking device for preparing nano calcium carbonate according to claim 5, characterized in that: Two water supply ports connected to an external water source are provided on one side of the top of the water storage tank near the center, and the bottom of the water storage tank is connected to the first nozzle through a plurality of connecting pipes.

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