Built-in sealed bone element neutralization and water washing tank and unloading method

Abstract

The application discloses a built-in sealing bone essence neutralizing and washing tank and a discharging method, and belongs to the field of gelatin production equipment. The neutralizing and washing tank comprises a tank body, a discharge port and a drainage port are arranged at the bottom of the tank body, and a sealing opening and closing mechanism, a bone essence containing part, a bone essence discharging guide part, a discharging flushing device and a pneumatic stirring and flow assisting device are arranged. The sealing opening and closing mechanism blocks from the inside of the discharge port, and eliminates the dead angle. The pneumatic stirring and flow assisting device comprises a plurality of directional blowing spray caps which are circumferentially arranged on the side wall of the guide part, and the gas outlet direction of each spray cap is inclined towards the center of the discharge port; when the liquid level is high, compressed air floats upwards to drive the liquid and the bone essence to form a cavity upwards, and the peripheral material is filled to form up-down circulating stirring; when the liquid level is low, the compressed air pushes the bone essence to flow out of the discharge port. The flushing device and the pneumatic device are coordinated during discharging, so that the bone essence is discharged under the action of gravity, flushing force and pneumatic force. The application has the advantages of uniform stirring, smooth discharging and no residue.

Description

Technical Field

[0001] This invention belongs to the technical field of neutralization water washing tanks for gelatin production, and particularly relates to a built-in sealed bone mineral neutralization water washing tank and a discharge method. Background Technology

[0002] Bone neutralization washing is a key step in gelatin production. Its purpose is to remove residual lime and salt from the bone through acid-base neutralization and multiple washes, ensuring the bone's pH value meets the requirements of subsequent gelatin extraction processes. The effectiveness of neutralization washing directly impacts key quality indicators such as gelatin yield, gel strength, and product purity.

[0003] Currently, gelatin manufacturers primarily use two types of equipment in the bone neutralization and washing process: open neutralization tanks and closed neutralization vessels. Open neutralization tanks are simple in structure and require less investment, but they suffer from drawbacks such as poor operating environment, long processing cycles, and low automation. In contrast, closed neutralization vessels effectively improve the operating environment and facilitate automated control, thus gradually becoming the mainstream equipment.

[0004] The applicant previously proposed an "Aeration-Type Water Washing Neutralization Tank for Bone Gelatin Production" (Authorization Announcement No.: CN207614832U). This neutralization tank includes a tank support and a tank body. A discharge cone is located at the lower end of the tank body, and a qualified bone particle discharge pipe is located at the bottom of the discharge cone. A grate plate is placed inside the tank. Two compressed air main pipes are symmetrically arranged along the inner wall of the tank body, extending from the upper end of the tank body to the bone particle discharge inlet of the discharge cone. An array of aeration branch pipes is located on the upper surface of the discharge cone, with several aeration holes on each branch pipe. This design uses compressed air aeration instead of traditional paddle mechanical stirring, reducing damage to bone fiber from the stirring blades.

[0005] However, this neutralization tank still has significant drawbacks in actual use. Firstly, the qualified bone particle discharge pipe is located at the bottom of the discharge cone, and the bone powder must be discharged through this pipe during the unloading process. Due to the length and bends within the pipe, bone powder particles easily accumulate on the inner wall. After long-term operation, the residual bone powder will decompose and breed microorganisms, adversely affecting the hygiene indicators of subsequent batches of products.

[0006] More importantly, during the neutralization and washing process, the bone mineral in the tank needs to fully contact and neutralize with the neutralizing agent and water to ensure that the pH value and ash content of the bone mineral meet the process requirements. However, a large amount of bone mineral material accumulated in the discharge pipe, because it is located in the discharge pipe section and is isolated from the main material in the tank, cannot fully circulate and contact with the neutralizing agent and water in the tank, making it difficult to participate in the neutralization and washing reaction. As a result, the neutralization degree of this part of the bone mineral is much lower than that of the main material in the tank. When finally unloading, this part of the insufficiently neutralized bone mineral is discharged first, mixing with the fully reacted material discharged later, which will cause uneven neutralization of the entire batch of bone mineral, affecting the quality stability of the gelatin product. In addition, the residual bone mineral adheres to the inner wall of the discharge pipe for a long time, gradually drying and hardening, which reduces the effective flow cross-section of the discharge pipe, and in severe cases, even causes blockage of the discharge pipe, affecting normal production. After each unloading, operators also need to spend a lot of time cleaning the discharge pipe, increasing labor intensity and reducing production efficiency.

[0007] Secondly, after the bone minerals are neutralized and washed in the tank, they are in a wet granular state with a high moisture content. Due to the liquid bridging force and adhesion, the particles tend to overlap as they converge towards the discharge port under gravity, forming a bridging phenomenon (also known as arching or bridging) above the discharge port. Severe bridging can lead to difficulties in unloading or even interruption of unloading. However, the aeration pipes in this tank can only provide vertically rising bubble disturbance, and cannot provide an effective centripetal pushing force to break up the bridging during the unloading stage. Once bridging occurs, operators often need to use external tools to clear it, which is not only inefficient but also increases labor intensity and hygiene risks.

[0008] In summary, existing bone mineral neutralization washing equipment still has significant shortcomings in its unloading structure design: bone minerals easily remain in the discharge pipe, and the residue decomposes and affects product quality; bone minerals are prone to bridging and clogging during unloading, resulting in poor unloading smoothness; and there is a lack of effective in-tank unloading auxiliary means, making it difficult to achieve clean and thorough unloading operations. Therefore, there is an urgent need to develop a new type of bone mineral neutralization washing tank that can effectively solve the above problems. Summary of the Invention

[0009] To address the problems existing in the prior art, the present invention provides a built-in sealed bone mineral neutralization washing tank and a discharge method.

[0010] This invention is implemented as follows: a built-in sealed bone mineral neutralization washing tank, comprising a tank body, wherein a discharge port and a drain port are provided at the center of a drainage guide cone at the bottom of the tank body, characterized in that it further comprises: An internal sealing unloading opening and closing mechanism is provided on the top of the tank. The internal sealing unloading opening and closing mechanism has a sealing valve mechanism provided inside the tank and corresponding to the discharge port. The sealing valve mechanism seals the discharge port inside the discharge port. The sealing valve mechanism keeps the discharge port closed during the bone mineral neutralization process and switches to the discharge port open during unloading. A bone mineral container is disposed inside the container, and the entire side wall of the bone mineral container is provided with sieve holes or a partially spaced area of ​​sieve holes. A bone extract unloading guide component is disposed at the bottom of the bone extract receiving component, and the entire side wall of the bone extract unloading guide component is provided with sieve holes or a partially spaced area of ​​sieve holes. A drainage space is formed between the tank body, the osteoporosis receiving component, and the osteoporosis unloading guiding component; A flushing device is installed on the bone meal receiving component inside the tank and is used to spray flushing medium toward the discharge port. A pneumatic stirring and flow-aiding device is installed on the bone meal receiving component at the bottom of the tank. It includes multiple directional spray nozzles arranged circumferentially on the side wall of the bone meal unloading guide component. The air outlet direction of each directional spray nozzle is inclined towards the center of the discharge port. When the liquid level in the tank is higher than a set value, the compressed air sprayed by the pneumatic stirring and flow-aiding device moves upward under the action of buoyancy, driving the liquid and bone meal to move upward and form a cavity. The surrounding material fills inward, forming an up-and-down circulating stirring flow field to achieve stirring and mixing. When the liquid level in the tank is lower than the set value, the compressed air sprayed directly pushes the bone meal towards the discharge port to achieve flow-aiding unloading. The sealing valve mechanism directly seals the inner port of the discharge port in the blocking state, so that there is no dead corner for bone meal retention in the discharge port when the discharge port is closed.

[0011] More preferably, the unloading flushing device includes a nozzle disposed at the lower part of the bone meal receiving component, a nozzle inclined toward the center of the tank is installed on the nozzle, the nozzle is connected to a media distribution pipe disposed on the outer wall of the tank through a media delivery pipe, and the media distribution pipe is connected to a flushing media source.

[0012] More preferably, the pneumatic stirring and flow aid device includes an air inlet disposed on the side wall of the bone meal unloading guide component. A directional spray nozzle is installed on the air inlet. The directional spray nozzle has an air outlet offset to one side of the nozzle, and the orifice of the air outlet is inclined toward the center of the discharge port. When the liquid level in the tank is submerged, the sprayed compressed air moves upward under the action of buoyancy, driving the bone meal and liquid to move upward, while forming a cavity. The surrounding material and liquid fill inward, forming an up-and-down circulating stirring flow field to achieve mixing. When the liquid level in the tank is lower than the bone meal layer, the sprayed compressed air directly pushes the bone meal toward the center of the discharge port, causing the bone meal to converge and flow toward the center of the discharge port. The air inlet is connected to an air source through an air supply pipe.

[0013] More preferably, the integrated pneumatic stirring and flow-aiding device includes at least one ring of directional spray nozzles arranged circumferentially along the bone mineral unloading guide component, each ring of nozzles comprising multiple directional spray nozzles evenly distributed circumferentially; each directional spray nozzle is connected to an air supply pipe, and each directional spray nozzle has an air outlet on one side, with the openings of each air outlet inclined towards the center of the bone mineral unloading guide component, so that the airflow ejected from each nozzle forms a centripetal converging airflow field within the bone mineral unloading guide component; in the liquid-submerged state, this centripetal airflow is converted into an upward airflow under the action of buoyancy, forming a cavity and driving the material to circulate and stir up and down; when the liquid level is lower than the bone mineral layer, the centripetal airflow directly pushes the bone mineral towards the center of the discharge port.

[0014] Further preferably, the internal sealing unloading opening and closing mechanism includes an upper drive mechanism and a sealing valve mechanism; the upper drive mechanism includes a lifting screw, a first bevel gear, a second bevel gear, a lifting nut, a mounting plate, a guide seat, and an operating component. The operating component is mounted on one end of a transverse transmission shaft, which is supported by bearings and fixedly mounted on the mounting plate. The other end of the transverse transmission shaft is fixedly connected to the second bevel gear, which meshes with the first bevel gear in the vertical direction. The first bevel gear is mounted on the top end of the lifting screw. The lifting screw passes through the lifting nut on the mounting plate and is threaded into it; the sealing valve mechanism includes a valve stem, a support seat, a valve seat, and a seal. The upper end of the valve stem is fixedly connected to the lower end of the lifting screw. The valve stem extends downward and passes through the support seat. The support seat is fixedly installed on the inner wall of the bone meal receiving component. The bottom end of the valve stem extends into the valve seat. The seal is disposed at the contact point between the valve seat and the valve stem, and is used to block the communication between the discharge port and the drainage space when the valve is in the blocked state.

[0015] Further preferably, the internal sealing unloading opening and closing mechanism includes an upper drive mechanism and a sealing valve mechanism; the upper drive mechanism includes a linear drive cylinder, a connecting plate, a mounting plate, a reinforcing plate, and a sleeve; the linear drive cylinder is vertically installed, its top passes through the connecting plate and is locked by a locking member; the cylinder body of the linear drive cylinder is fixedly installed on the mounting plate; the reinforcing plate is fixedly connected to the lower part of the mounting plate; and the sleeve is fixedly connected to the lower end of the reinforcing plate; the piston rod of the linear drive cylinder... The piston rod extends downwards, passing sequentially through the mounting plate, the reinforcing plate, and the sleeve. The bottom end of the piston rod is fixedly connected to the valve rod below. The sleeve is fitted over the valve rod or piston rod. The sealing valve mechanism includes a valve rod, a valve seat, and a seal. The upper end of the valve rod is fixedly connected to the bottom end of the piston rod. The bottom end of the valve rod extends into the valve seat. The seal is located at the contact point between the valve seat and the valve rod, and is used to block the communication between the discharge port and the drainage space when the valve is in the blocked state.

[0016] More preferably, the upper drive mechanism further includes a fixed plate, a reinforcing plate, and a sleeve. The fixed plate is connected to the lower part of the mounting plate, the reinforcing plate is provided on the side of the fixed plate, and the sleeve is fixedly connected to the lower part of the fixed plate and the reinforcing plate. The sleeve is sleeved on the outside of the lifting screw.

[0017] This invention also relates to a method for unloading a built-in sealed bone mineral neutralization washing tank, characterized by comprising the following steps: S1: Neutralization and Washing Stage: Control the internal sealing and unloading opening and closing mechanism to keep the sealing valve mechanism closed at the outlet; add bone meal and treatment liquid into the tank, start the pneumatic stirring and flow aid device, and spray gas towards the center of the tank through the directional spray nozzle. The compressed air moves upward under the action of buoyancy, which drives the bone meal and treatment liquid upward, forming a cavity. The material and liquid on the outside fill the cavity, forming an up-and-down circulating stirring flow field, so that the bone meal is in a fluidized and uniformly mixed state in the bone meal container to accelerate the neutralization or washing reaction; the reaction waste liquid enters the drain space through the sieve holes on the bone meal container and / or the bone meal unloading guide component and is discharged from the drain outlet; repeat the liquid feeding, pneumatic stirring circulation, and drainage operations until the neutralization and washing meet the process requirements; S2: Unloading preparation stage: Stop liquid inlet and drainage, lower the liquid level in the tank to a preset position below the bone mineral layer, start the unloading flushing device, and spray the flushing medium from the lower part of the bone mineral receiving component toward the discharge port to pre-loosen and wet the bone mineral around the discharge port and in the bone mineral unloading guide component. S3: Coordinated Unloading Stage: The unloading flushing device is kept in spray mode, while the air pressure of the pneumatic stirring and flow-aiding device is switched from stirring mode pressure to unloading boosting mode pressure. This allows gas to be sprayed directly towards the center of the discharge port through the directional spray nozzle, forming a centripetal airflow converging towards the discharge port within the bone marrow unloading guide component. This centripetal airflow disrupts bone marrow bridging on one hand and pushes bone marrow towards the discharge port on the other. Then, the internal sealing unloading opening and closing mechanism is driven to switch the sealing valve mechanism from the blocking state to the unloading state. In the material state, the inner port of the discharge port is opened; the flushing medium sprayed by the unloading flushing device forms a fluid flushing force above the discharge port, and the centripetal airflow generated by the pneumatic stirring and flow aid device forms a pneumatic pushing force around the discharge port. Under the synergistic effect of the gas-liquid-solid three phases, the bone extract is collected by the bone extract unloading guide component and discharged through the discharge port under the combined action of gravity, flushing impact force and pneumatic pushing force. Moreover, the sealing valve mechanism is always inside the tank during the opening process, and there are no dead corners in the external pipeline in the bone extract discharge path. S4: Unloading and Reset Stage: After the bone mineral is discharged, the unloading flushing device and the pneumatic stirring and flow aid device are turned off, and the internal sealing unloading opening and closing mechanism is driven to restore the sealing valve mechanism to the blocked state, and the inner port of the discharge port is resealed.

[0018] More preferably, in step S3, the pneumatic stirring and flow aid device starts the unloading boosting mode in advance before the sealing valve mechanism switches to the unloading state, so that the bone marrow is in a fluidized anti-bridging state before the discharge port is opened.

[0019] More preferably, in S3, the unloading flushing device continues to spray after the sealing valve mechanism switches to the unloading state until the bone mineral is completely discharged, so as to use the fluid flushing force of the flushing medium to remove the residual bone mineral on the bone mineral unloading guide component and the inner wall of the discharge port.

[0020] The advantages and technical effects of this invention are as follows: The built-in sealed bone mineral neutralization washing tank and unloading method provided by this invention seal the outlet from the inside of the tank through an internal sealing unloading opening and closing mechanism, eliminating the defect of bone mineral stagnation in the valve channel in traditional external valve structures, thus fundamentally avoiding the impact of bone mineral residue and spoilage on product quality. The pneumatic stirring and flow-aiding device integrates stirring and flow-aiding functions. When the liquid level is high, compressed air rises to form cavities, and the surrounding material fills inward, achieving vertical circulation and mixing of the material, avoiding the sieve clogging problem caused by horizontal rotation. When the liquid level is low, bone mineral is directly pushed towards the outlet to achieve flow-aided unloading, making it a dual-purpose and compact device. The unloading flushing device continuously sprays flushing media during the unloading process, forming a gas-liquid-solid three-phase synergy with the pneumatic pushing force and gravity, significantly improving the smoothness and thoroughness of unloading. Overall, this invention has the advantages of uniform mixing, smooth unloading, no residue dead corners, stable product quality, and high degree of automation, and has good prospects for promotion and application. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the internal sealing unloading opening and closing mechanism of the present invention; Figure 3 yes Figure 1 Enlarged view of the middle section (I); Figure 4 yes Figure 1 Enlarged view of Part II; Figure 5 This is a schematic diagram of the directional jet spray nozzle structure; Figure 6 yes Figure 5 Top view; Figure 7 yes Figure 5 Sectional view of AA; Figure 8 This is a schematic diagram of the overall structure of Implementation 2; Figure 9 It is an automatic internal sealing unloading opening and closing mechanism.

[0022] In the diagram: 1. Tank body; 11. Drainage guide cone; 12. Discharge port; 13. Drain outlet; 14. Drainage space; 2. Internal sealing unloading opening and closing mechanism; 21. Upper drive mechanism; 211. Lifting screw; 212. First bevel gear; 213. Second bevel gear; 214. Lifting nut; 215. Mounting plate; 216. Guide seat; 217. Operating component; 218. Transverse transmission shaft; 219. Bearing; 220. Fixing plate; 221. Reinforcing plate; 222. Sleeve; 223. Linear drive cylinder; 224. Connecting plate; 225. 226. Locking component; 227. Piston rod; 228. Sealing valve mechanism; 229. Valve stem; 220. Support base; 231. Valve seat; 232. Seal; 233. Sealing ring; 234. Diagonal support rod; 3. Bone extract receiving component; 31. First sieve hole; 4. Bone extract unloading guide component; 41. Second sieve hole; 5. Unloading flushing device; 51. Nozzle; 52. Nozzle; 53. Medium conveying pipe; 54. Medium distribution pipe; 6. Pneumatic stirring and flow aid device; 61. Directional spray nozzle; 62. Air inlet; 63. Air outlet; 64. Air supply pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] Example 1, such as Figures 1 to 7 As shown, the present invention provides a built-in sealed osteocalcin neutralizing wash tank, including a tank body 1. A discharge port 12 and a drain port 13 are provided at the center of a drainage guide cone 11 at the bottom of the tank body 1. The drainage guide cone 11 is used to guide and collect the liquid inside the tank to the drain port 13 for discharge; its conical structure facilitates the directional flow of liquid and osteocalcin.

[0025] A key improvement of this invention is that the bone mineral neutralization washing tank further includes an internal sealing and unloading opening and closing mechanism 2, disposed at the top of the tank body 1. The internal sealing and unloading opening and closing mechanism 2 has a sealing valve mechanism 22 disposed inside the tank body 1 and correspondingly cooperating with the discharge port 12. The sealing valve mechanism 22 seals and blocks the discharge port 12 from the inside. During the bone mineral neutralization process, the sealing valve mechanism 22 remains in a closed blocking state of the discharge port 12, and switches to an open discharging state of the discharge port 12 during unloading.

[0026] The built-in sealed bone mineral neutralization washing tank also includes a bone mineral containing component 3, which is disposed within the tank body 1. The bone mineral containing component 3 has a first sieve hole 31 on its entire side wall or a sieve hole area at intervals. The bone mineral containing component 3 is used to contain the bone mineral raw material to be processed. The sieve hole arrangement allows the processing liquid to freely enter and exit the bone mineral containing component 3, while the bone mineral is trapped inside.

[0027] The built-in sealed bone mineral neutralization washing tank also includes a bone mineral discharge guide component 4, located at the bottom of the bone mineral receiving component 3. The bone mineral discharge guide component 4 has a second sieve hole on its entire side wall or a partially spaced sieve hole area. A drainage space 14 is formed between the tank body 1, the bone mineral receiving component 3, and the bone mineral discharge guide component 4. The bone mineral discharge guide component 4 has a funnel-shaped or frustum-shaped structure, and its bottom is connected to the discharge port 12 to guide and collect the bone mineral to the discharge port 12 for discharge. The drainage space 14 serves as a space for liquid to collect after being discharged from the bone mineral receiving component 3, and the waste liquid is discharged outside the tank through the drain port 13. The sieve holes and their diameter should be selected according to the particle size of the bone meal particles, preferably 3-16mm, to ensure that the bone meal does not pass through the sieve holes and is lost, while ensuring that the liquid can pass through smoothly. In addition, the sieve holes can be directly machined on the side walls of the bone meal receiving component and the bone meal unloading guide component, or a sieve hole area can be reserved in advance. The sieve hole area can be a regular geometric hollow area, such as rectangular, directional, circular, etc. Then, a grate plate with sieve holes is installed in the sieve hole area. The grate plate is detachable for easy cleaning and replacement.

[0028] The built-in sealed bone mineral neutralization washing tank also includes a discharge flushing device 5, which is disposed on the bone mineral receiving component 3 inside the tank body 1, for spraying flushing medium toward the discharge port 12. The flushing medium can be water, process liquid, or compressed air, etc., with water being preferred.

[0029] The built-in sealed bone mineral neutralization and washing tank also includes a pneumatic stirring and flow-aiding device 6, which is disposed on the bone mineral receiving component 3 at the bottom of the tank body 1. The pneumatic stirring and flow-aiding device 6 includes a plurality of directional spray nozzles 61 arranged circumferentially on the side wall of the bone mineral unloading guide component 4. The air outlet direction of each of the directional spray nozzles 61 is inclined towards the discharge port 12 along the tangent of the bone mineral unloading guide component 4. When the liquid level in the tank is higher than a set value, the pneumatic stirring and flow-aiding device 6 drives the liquid and bone mineral to form a rotating circulation through the sprayed gas to achieve stirring and mixing. When the liquid level in the tank is lower than the set value, the pneumatic stirring and flow-aiding device 6 pushes the bone mineral towards the discharge port 12 through the sprayed gas to achieve flow-aided unloading.

[0030] The sealing valve mechanism 22 directly seals the inner port of the outlet 12 in the blocked state, ensuring that there is no dead corner for bone mineral retention in the outlet 12 when it is closed. Because the sealing valve mechanism 22 seals from the inside of the outlet 12, the internal channel of the outlet 12 has no steps or recesses in the blocked state, preventing bone mineral from accumulating in dead corners at the outlet 12. This avoids the problem of bone mineral residue and deterioration within the valve channel, as is common in traditional external valve structures.

[0031] In this embodiment, the unloading flushing device 5 includes a nozzle 51 located at the lower part of the bone meal receiving component 3, and a nozzle 52 inclined towards the center of the tank 1 is mounted on the nozzle 51. The nozzle 52 is connected to a media distribution pipe 54 located on the outer wall of the tank 1 via a media delivery pipe 53, and the media distribution pipe 54 is connected to a flushing media source. The inclination angle of the nozzle 52 can be adjusted according to actual needs, generally forming an angle of 15° to 45° with the horizontal direction, so that the flushing media can effectively flush the area around the discharge port 12. The media distribution pipe 54 is arranged circumferentially along the outer wall of the tank 1 and can connect to multiple nozzles 52 simultaneously to achieve multi-point simultaneous flushing.

[0032] In this technical solution, the unloading flushing device 5 sprays flushing medium towards the center of the tank through nozzles 52 located at the lower part of the bone meal receiving component 3. This flushes the bone meal around the outlet 12 and within the bone meal unloading guide component 4 during the unloading process. Its working principle is as follows: the flushing medium is transported to the nozzle 52 via the medium conveying pipe 53 under pressure, and then ejected at high speed from the nozzle 52 towards the outlet 12, creating a fluid flushing force. This fluid flushing force can, on the one hand, disrupt any bridging structures that may form above the outlet 12, and on the other hand, flush away the bone meal adhering to the inner wall of the bone meal unloading guide component 4, causing it to converge towards the outlet 12 under gravity. The flow of the flushing medium also creates localized fluid disturbance above the outlet 12, reducing the friction between bone meal particles and improving the fluidity of the bone meal, thereby effectively improving unloading efficiency and reducing residue.

[0033] In this embodiment, the pneumatic stirring and flow-aiding device 6 includes an air inlet 62 disposed on the side wall of the bone meal unloading guide component 4. A directional spray nozzle 61 is installed on the air inlet 62. The directional spray nozzle 61 has an air outlet 63 offset to one side of the nozzle. At least one air outlet 63 is provided, preferably 3-5; the opening of the air outlet 63 is inclined towards the center of the discharge port 12. When the liquid level in the tank is submerged, compressed air is ejected from the air outlet 63 and moves upward under buoyancy, driving the bone meal and liquid upward, simultaneously forming cavities. The surrounding material and liquid fill these cavities, creating an up-and-down circulating stirring flow field to achieve mixing and stirring. When the liquid level in the tank is lower than the bone meal layer, compressed air is directly ejected towards the center of the discharge port 12, pushing the bone meal towards the center of the discharge port 12 to achieve flow-aided unloading. The air inlet 62 is connected to an air source via an air supply pipe 64. The air source can be compressed air or nitrogen, preferably compressed air. A pressure regulating valve and a flow regulating valve can be installed on the gas supply pipe 64 to adjust the gas supply pressure and flow according to different process stages.

[0034] In this technical solution, the pneumatic stirring and flow-aiding device 6 integrates stirring and flow-aiding functions through the special structural design of the directional spray nozzle 61. Its working principle is as follows: compressed gas enters the inlet 62 through the air supply pipe 64 and is ejected from the outlet 63 of the directional spray nozzle 61. Since the outlet 63 is offset to one side of the nozzle and tilted towards the center of the discharge port 12, the ejected gas forms a centripetal airflow inside the bone meal unloading guide component 4. When the liquid level in the tank is high (submerging the bone meal layer), this centripetal airflow moves upward under buoyancy, forming an upward airflow that drives the liquid and bone meal upward. During the upward airflow, local gas cavities are formed. The material and liquid around these cavities fill inward and downward under the action of pressure difference and gravity, thus forming a "rising-diffusion-sinking-inward replenishment" circulating stirring flow field inside the tank, ensuring thorough contact and mixing of the bone meal and the treated liquid, achieving uniform stirring. No horizontal rotational motion is generated during this process, and the bone meal does not repeatedly pass through the sieve area, avoiding the risk of sieve blockage. When the liquid level in the tank is low (below the bone mineral layer), the gas acts directly on the bone mineral layer, and the centripetal airflow pushes the bone mineral particles directly towards the center of the discharge port 12. At the same time, the airflow disturbs the bone mineral layer, destroying any possible bridging structures, thereby promoting the smooth discharge of bone mineral.

[0035] In this embodiment, the pneumatic stirring and flow-aiding device 6 includes at least one ring of directional spray nozzles arranged circumferentially along the bone material unloading guide component 4. Each ring of nozzles includes multiple directional spray nozzles 61 evenly distributed circumferentially. Each directional spray nozzle 61 is connected to an air supply pipe 64. Each directional spray nozzle 61 has an air outlet 63 on one side. The openings of each air outlet 63 are inclined towards the center of the bone material unloading guide component 4. In stirring mode, the centripetal airflow ejected from each nozzle is converted into an upward airflow under the action of buoyancy, forming a uniform upward flow field across the entire cross-section of the bone material unloading guide component 4, thereby driving all bone material to participate in the up-and-down circulating stirring, improving the uniformity and efficiency of stirring. In flow-aiding mode, each nozzle simultaneously sprays towards the center, generating a centripetal thrust along the entire circumference of the bone material unloading guide component 4, causing the bone material to evenly converge from all sides towards the central discharge port 12, avoiding local accumulation and bridging phenomena, and significantly improving the smoothness and thoroughness of unloading. The number of rings can be adjusted flexibly according to the size of the tank and the amount of bone extract, and is generally set to 1 to 3 rings.

[0036] In this embodiment, the internal sealing unloading opening and closing mechanism 2 includes an upper drive mechanism 21 and a sealing valve mechanism 22. As an optional embodiment, the upper drive mechanism 21 includes a lifting screw 211, a first bevel gear 212, a second bevel gear 213, a lifting nut 214, a mounting plate 215, a guide seat 216, and an operating member 217. The operating member 217 is mounted on one end of a transverse drive shaft 218. The transverse drive shaft 218 is supported by a bearing 219 and fixedly mounted on the mounting plate 215. The other end of the transverse drive shaft 218 is fixedly connected to the second bevel gear 213. The second bevel gear 213 meshes with the first bevel gear 212 in a vertical direction. The first bevel gear 212 is mounted on the top end of the lifting screw 211. The lifting screw 211 passes through the lifting nut 214 on the mounting plate 215 and is threadedly engaged with it. The sealing valve mechanism 22 includes a valve stem 227, a support seat 228, a valve seat 229, and a seal 230. The upper end of the valve stem 227 is fixedly connected to the lower end of the lifting screw 211. The valve stem 227 extends downward and passes through the support seat 228. The support seat 228 is fixedly installed on the inner wall of the bone meal receiving component 3 by a diagonal support rod 232. The sealing element at the bottom end of the valve stem 227 extends into the valve seat 229. The sealing element 230 is disposed at the contact portion between the valve seat 229 and the valve stem 227, and is used to block the communication between the discharge port 12 and the drainage space 14 when the valve is in the blocked state. The sealing element is provided with a sealing ring 231.

[0037] In this technical solution, the operator rotates the operating component 217 to drive the horizontal transmission shaft 218 to rotate. The horizontal transmission shaft 218 converts the horizontal rotational motion into vertical rotational motion through the meshing of the second bevel gear 213 and the first bevel gear 212, driving the lifting screw 211 to rotate. The lifting screw 211 is threadedly engaged with the lifting nut 214 fixedly mounted on the mounting plate 215. During rotation, it moves up and down relative to the lifting nut 214, thereby driving the valve stem 227 fixedly connected to it to move up and down. When the valve stem 227 rises, its bottom end disengages from the valve seat 229, and the discharge port 12 opens; when the valve stem 227 falls, its bottom end embeds into the valve seat 229 and is sealed by the sealing element 230. This manual drive method has a simple structure, high reliability, and low cost, and is suitable for applications with low automation requirements. The sealing element 230 is preferably made of food-grade rubber or polytetrafluoroethylene to ensure reliable sealing and prevent contamination of the bone extract product.

[0038] Example 2: In this embodiment, as another optional implementation, please refer to... Figure 8 and Figure 9 The internal sealing unloading opening and closing mechanism 2 includes an upper drive mechanism 21 and a sealing valve mechanism 22. The upper drive mechanism 21 includes a linear drive cylinder 223, a connecting plate 224, a mounting plate 215, a reinforcing plate 221, and a sleeve 222. The linear drive cylinder 223 is vertically installed. The top of the linear drive cylinder 223 passes through the connecting plate 224 and is locked by a locking member 225. The cylinder body of the linear drive cylinder 223 is fixedly installed on the mounting plate 215. The reinforcing plate 221 is fixedly connected to the lower part of the mounting plate 215. The sleeve 222 is fixedly connected to the lower end of the reinforcing plate 221. The piston rod 226 of the linear drive cylinder 223 extends downwards, passing sequentially through the mounting plate 215, the reinforcing plate 221, and the sleeve 222. The bottom end of the piston rod 226 is fixedly connected to the valve rod 227 below. The sleeve 222 is fitted over the valve rod 227 or the piston rod 226. The sealing valve mechanism 22 includes a valve stem 227, a valve seat 229, and a seal 230. The upper end of the valve stem 227 is fixedly connected to the bottom end of the piston rod 226. The bottom end of the valve stem 227 extends into the valve seat 229. The seal 230 is disposed at the contact portion between the valve seat 229 and the valve stem 227, and is used to block the communication between the discharge port 12 and the drainage space 14 when the valve is in the blocked state.

[0039] In this technical solution, a linear drive cylinder 223 (which can be a pneumatic or hydraulic cylinder) drives a piston rod 226 to perform linear reciprocating motion. The piston rod 226 drives the valve rod 227 to rise and fall, thereby opening and closing the discharge port 12. The linear drive cylinder 223 is fixedly mounted on the mounting plate 215. A connecting plate 224 and a locking member 225 are used to fix the top of the linear drive cylinder 223 to ensure stable and reliable operation. A reinforcing plate 221 is used to enhance the strength and rigidity of the mounting plate 215. A sleeve 222 is fitted over the valve rod 227 or piston rod 226 to guide and protect the movement of the valve rod 227. This automatic drive method can achieve remote control, facilitates integration with automated control systems, and improves production efficiency and operational safety. The sealing member 230 is preferably made of food-grade rubber or polytetrafluoroethylene.

[0040] In this embodiment, the upper drive mechanism 21 further includes a fixing plate 220, a reinforcing plate 221, and a sleeve 222. The fixing plate 220 is connected to the lower part of the mounting plate 215. The reinforcing plate 221 is provided on the side of the fixing plate 220. The sleeve 222 is fixedly connected to the lower part of the fixing plate 220 and the reinforcing plate 221. The sleeve 222 is sleeved on the outside of the lifting screw 211. The fixing plate 220 is used to fix the upper drive mechanism 21 to the top structure of the tank body 1, and the reinforcing plate 221 serves to strengthen the connection between the fixing plate 220 and the sleeve 222. The sleeve 222 is sleeved on the outside of the lifting screw 211, which guides and protects the lifting screw 211, preventing it from swaying during rotation, and also preventing the lifting screw 211 from being directly exposed to the tank environment and subjected to corrosion or contamination.

[0041] The connection methods and sealing methods between components not explicitly mentioned in the above embodiments can all be achieved using conventional technical means in the field, such as flange connection, welding, threaded connection, etc. The sealing can be achieved by gasket sealing, packing sealing, etc., and the present invention does not make any special limitations on this.

[0042] In summary, the internal sealing and unloading opening and closing mechanism, by placing the sealing valve mechanism inside the tank and directly corresponding to the discharge port, and the upper drive mechanism located at the top of the tank to drive the valve rod to rise and fall, achieves sealing or opening of the discharge port from the inside. This mechanism eliminates the need for a discharge pipe and discharge valve on the outside of the tank bottom, fundamentally solving the problem of a large amount of bone mineral accumulating in the discharge pipe section in traditional structures. This ensures that all bone mineral is located inside the tank during the neutralization and washing process, allowing it to fully contact the neutralizing agent and water and participate in the neutralization reaction. This avoids the defect of uneven neutralization effect in the entire batch of product due to bone mineral in the discharge pipe section being unable to participate in the reaction.

[0043] The following describes in detail the usage process of the above-mentioned built-in sealed bone mineral neutralization washing tank in conjunction with the unloading method of the present invention.

[0044] The present invention also provides a method for unloading the above-mentioned built-in sealed bone mineral neutralization washing tank, comprising the following steps: S1: Neutralization and Washing Stage: Control the internal sealing and unloading opening and closing mechanism 2 to keep the sealing valve mechanism 22 closed at the outlet 12. Add bone extract and treatment liquid into the tank 1. The treatment liquid can be an acidic solution, alkaline solution, or washing liquid, etc., specifically determined according to the process requirements of bone extract neutralization or washing. Activate the pneumatic stirring and flow aid device 6. Gas is sprayed towards the center of the tank through the directional spray nozzle 61. Compressed air moves upward under the action of buoyancy, driving the bone extract and treatment liquid upward, while forming cavities. The surrounding material and liquid fill inward, forming an up-and-down circulating stirring flow field, so that the bone extract is in a fluidized and uniformly mixed state in the bone extract receiving component 3, thereby accelerating the neutralization or washing reaction. The reaction waste liquid enters the drain space 14 through the sieve holes on the bone extract receiving component 3 and / or the bone extract unloading guide component 4 and is discharged from the drain outlet 13. The process involves repeated liquid feeding, pneumatic agitation and circulation, and drainage until neutralization and washing meet process requirements. During this stage, the sealing valve mechanism 22 remains sealed to ensure the treated liquid does not leak from the outlet 12. Pneumatic agitation and circulation ensure sufficient contact between the bone extract and the treated liquid, significantly improving reaction efficiency. The perforated sieve allows for timely discharge of waste liquid, facilitating multiple batch liquid replacement operations.

[0045] S2: Unloading Preparation Stage: Stop liquid inlet and outlet, and lower the liquid level in the tank to a preset position below the bone mineral layer. Activate the unloading flushing device 5, spraying the flushing medium from the lower part of the bone mineral receiving component 3 towards the outlet 12, pre-loosening and wetting the bone mineral around the outlet 12 and within the bone mineral unloading guide component 4. In this stage, lowering the liquid level exposes the bone mineral layer above the liquid surface, facilitating subsequent unloading operations. The pre-flushing effect of the unloading flushing device 5 can preemptively disrupt any bridging structures that may form around the outlet 12, while simultaneously wetting the bone mineral surface, reducing friction and adhesion between bone mineral particles, creating favorable conditions for smooth unloading.

[0046] S3: Coordinated Unloading Stage: The unloading flushing device 5 is kept in spray mode, while the air pressure of the pneumatic stirring and flow-aiding device 6 is switched from stirring mode pressure to unloading boosting mode pressure. The stirring mode pressure is generally 0.1~0.4MPa, and the unloading boosting mode pressure is generally 0.2~0.6MPa. Specific pressure values ​​can be adjusted according to the type of bone mineral, water content, and tank size. Gas is sprayed directly from the directional spray nozzle 61 towards the center of the outlet 12, forming a centripetal airflow converging towards the outlet within the bone mineral unloading guide component 4. This pushes the bone mineral directly from all sides towards the central outlet, while the airflow disturbance disrupts bone mineral bridging. Then, the internal sealing unloading opening and closing mechanism 2 is driven to switch the sealing valve mechanism 22 from the blocking state to the unloading state, opening the inner port of the outlet 12. The flushing medium sprayed by the unloading flushing device 5 creates a fluid scouring force above the discharge port 12, while the centripetal airflow generated by the pneumatic stirring and flow aiding device 6 creates a pneumatic pushing force around the discharge port 12. Under the synergistic effect of the gas-liquid-solid three-phase system, the bone marrow is drawn through the bone marrow unloading guide component 4 and discharged through the discharge port 12 under the combined action of gravity, flushing impact force, and pneumatic pushing force. Furthermore, the sealing valve mechanism 22 remains inside the tank 1 throughout the opening process, eliminating any dead zones in the bone marrow discharge path. During this stage, the pneumatic stirring and flow aiding device 6 switches to high-pressure mode, generating a strong pneumatic pushing force within the bone marrow unloading guide component 4, propelling the bone marrow from all sides towards the central discharge port 12. Simultaneously, the unloading flushing device 5 continuously sprays flushing medium, creating a fluid scouring force above the discharge port 12. The synergistic effect of gravity, pneumatic pushing force, and flushing impact force ensures that the bone marrow is discharged quickly and smoothly through the discharge port 12. Since the sealing valve mechanism 22 is located inside the tank body 1, the bone mineral is discharged directly after the outlet 12 is opened. There is no problem of bone mineral remaining in the valve body pipeline in the traditional external valve structure, which fundamentally avoids bone mineral residue and deterioration.

[0047] S4: Unloading Completion and Reset Stage: After the bone mineral is completely discharged, shut down the unloading flushing device 5 and the pneumatic stirring and flow-aiding device 6. Drive the internal sealing unloading opening and closing mechanism 2 to restore the sealing valve mechanism 22 to the blocked state, and re-close the inner port of the discharge port 12. After resetting, the next batch of neutralization and washing operations can be performed.

[0048] Preferably, in step S3, the pneumatic stirring and flow-aiding device 6 activates the unloading boosting mode before the sealing valve mechanism 22 switches to the unloading state, ensuring that the bone mineral is already in a fluidized, anti-bridging state before the discharge port 12 opens. By switching to the unloading boosting mode in advance, the bone mineral is already in a fluidized state under the disturbance of the airflow before the discharge port 12 opens, and the bridging structure between bone mineral particles is effectively destroyed. When the discharge port 12 opens, the bone mineral can immediately begin to be discharged under gravity, avoiding blockage caused by bone mineral bridging at the moment the discharge port 12 opens, thus improving the timeliness and smoothness of unloading.

[0049] Preferably, in step S3, the unloading flushing device 5 continues to spray after the sealing valve mechanism 22 switches to the unloading state until the bone mineral is completely discharged, so as to use the fluid flushing force of the flushing medium to remove residual bone mineral on the bone mineral unloading guide component 4 and the inner wall of the outlet 12. By maintaining the spraying of the flushing medium throughout the unloading process, the fluid flushing force of the flushing medium can continuously act on the inner wall of the bone mineral unloading guide component 4 and the inner wall of the outlet 12, flushing away the bone mineral particles adhering to the wall surface and discharging them with the mainstream bone mineral. This not only improves the bone mineral recovery rate and reduces waste, but also avoids the impact of residual bone mineral spoilage in the tank on the quality of the next batch of products, while also reducing the difficulty of equipment cleaning.

[0050] In the above unloading method, the process parameters in each step (such as liquid addition amount, stirring time, flushing medium pressure, air source pressure, etc.) can be appropriately adjusted according to the actual bone mineral type, processing volume and process requirements. Those skilled in the art can determine the optimal process conditions through limited experiments, and the present invention does not make specific limitations in this regard.

[0051] This invention utilizes an internal sealing and unloading mechanism 2 at the top of the tank 1, allowing the sealing valve mechanism 22 to seal from the inside of the discharge port 12, thus avoiding the dead zone problem of bone meal retention caused by external valves in traditional structures. Simultaneously, a pneumatic stirring and flow-aiding device 6 integrates stirring and flow-aiding functions. When the liquid level is high, it drives the bone meal to form a rotating circulation with the liquid for uniform mixing; when the liquid level is low, it pushes the bone meal towards the discharge port 12 for unloading. The unloading and rinsing device 5 further improves the smoothness and thoroughness of unloading. The synergistic effect of these three components effectively solves technical problems such as uneven stirring, unsmooth unloading, and bone meal residue during bone meal neutralization and washing, improving production efficiency and product quality.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A built-in sealed osteomineral neutralizing wash tank, comprising a tank body, wherein a discharge port and a drain port are provided at the center of a drainage guide cone at the bottom of the tank body, characterized in that, Also includes: An internal sealing unloading opening and closing mechanism is provided on the top of the tank. The internal sealing unloading opening and closing mechanism has a sealing valve mechanism provided inside the tank and corresponding to the discharge port. The sealing valve mechanism seals the discharge port inside the discharge port. The sealing valve mechanism keeps the discharge port closed during the bone mineral neutralization process and switches to the discharge port open during unloading. A bone mineral container is disposed inside the container, and the entire side wall of the bone mineral container is provided with sieve holes or a partially spaced area of ​​sieve holes. A bone extract unloading guide component is disposed at the bottom of the bone extract receiving component, and the entire side wall of the bone extract unloading guide component is provided with sieve holes or a partially spaced area of ​​sieve holes. A drainage space is formed between the tank body, the osteoporosis receiving component, and the osteoporosis unloading guiding component; A flushing device is installed on the bone meal receiving component inside the tank and is used to spray flushing medium toward the discharge port. A pneumatic stirring and flow-aiding device is installed on the bone meal receiving component at the bottom of the tank. It includes multiple directional spray nozzles arranged circumferentially on the side wall of the bone meal unloading guide component. The air outlet direction of each directional spray nozzle is inclined towards the center of the discharge port. When the liquid level in the tank is higher than a set value, the compressed air sprayed by the pneumatic stirring and flow-aiding device moves upward under the action of buoyancy, driving the liquid and bone meal to move upward and form a cavity. The surrounding material fills inward, forming an up-and-down circulating stirring flow field to achieve stirring and mixing. When the liquid level in the tank is lower than the set value, the compressed air sprayed directly pushes the bone meal towards the discharge port to achieve flow-aiding unloading. The sealing valve mechanism directly seals the inner port of the discharge port in the blocking state, so that there is no dead corner for bone meal retention in the discharge port when the discharge port is closed.

2. The built-in sealed osteomineral neutralization wash tank according to claim 1, characterized in that, The unloading flushing device includes a nozzle located at the lower part of the bone meal receiving component. The nozzle is equipped with a nozzle that is inclined towards the center of the tank. The nozzle is connected to a media distribution pipe located on the outer wall of the tank via a media delivery pipe. The media distribution pipe is connected to a flushing media source.

3. The built-in sealed osteomineral neutralization wash tank according to claim 1, characterized in that, The pneumatic stirring and flow aid device includes an air inlet disposed on the side wall of the bone meal unloading guide component. A directional spray nozzle is installed on the air inlet. The directional spray nozzle has an air outlet offset to one side of the nozzle, and the orifice of the air outlet is inclined toward the center of the discharge port. When the liquid level in the tank is submerged, the compressed air sprayed out moves upward under the action of buoyancy, driving the bone meal and liquid to move upward, while forming a cavity. The material and liquid on the outside fill the cavity inward, forming an up-and-down circulating stirring flow field to achieve mixing. When the liquid level in the tank is lower than the bone meal layer, the compressed air sprayed out directly pushes the bone meal toward the center of the discharge port, causing the bone meal to converge and flow toward the center of the discharge port. The air inlet is connected to an air source through an air supply pipe.

4. The built-in sealed osteomineral neutralization wash tank according to claim 3, characterized in that, The integrated pneumatic stirring and flow-aiding device includes at least one ring of directional spray nozzles arranged circumferentially along the bone mineral unloading guide component. Each ring of nozzles includes multiple directional spray nozzles evenly distributed circumferentially. Each directional spray nozzle is connected to an air supply pipe, and each directional spray nozzle has an air outlet on one side. The openings of each air outlet are inclined towards the center of the bone mineral unloading guide component, so that the airflow ejected from each nozzle forms a centripetal converging airflow field within the bone mineral unloading guide component. When the liquid level is submerged, the centripetal airflow is converted into an upward airflow under the action of buoyancy, forming a cavity and driving the material to circulate and stir up and down. When the liquid level is lower than the bone mineral layer, the centripetal airflow directly pushes the bone mineral towards the center of the discharge port.

5. The built-in sealed osteomineral neutralization wash tank according to claim 1, characterized in that, The internal sealing unloading opening and closing mechanism includes an upper drive mechanism and a sealing valve mechanism. The upper drive mechanism includes a lifting screw, a first bevel gear, a second bevel gear, a lifting nut, a mounting plate, a guide seat, and an operating component. The operating component is mounted on one end of a transverse transmission shaft, which is supported by bearings and fixedly mounted on the mounting plate. The other end of the transverse transmission shaft is fixedly connected to the second bevel gear, which meshes with the first bevel gear in the vertical direction. The first bevel gear is mounted on the top end of the lifting screw, and the lifting screw passes through the lifting nut on the mounting plate and is threadedly engaged with it. The sealing valve mechanism includes a valve stem, a support base, a valve seat, and a seal. The upper end of the valve stem is fixedly connected to the lower end of the lifting screw. The valve stem extends downward and passes through the support base. The support base is fixedly installed on the inner wall of the bone meal receiving component. The bottom end of the valve stem extends into the valve seat. The seal is disposed at the contact portion between the valve seat and the valve stem, and is used to block the communication between the discharge port and the drainage space when the valve is in the blocked state.

6. The built-in sealed osteomineral neutralization wash tank according to claim 1, characterized in that, The internal sealing unloading opening and closing mechanism includes an upper drive mechanism and a sealing valve mechanism. The upper drive mechanism includes a linear drive cylinder, a connecting plate, a mounting plate, a reinforcing plate, and a sleeve. The linear drive cylinder is vertically installed, and its top passes through the connecting plate and is locked by a locking device. The cylinder body of the linear drive cylinder is fixedly installed on the mounting plate. The reinforcing plate is fixedly connected to the lower part of the mounting plate, and the sleeve is fixedly connected to the lower end of the reinforcing plate. The piston rod of the linear drive cylinder extends downward and passes through the mounting plate, the reinforcing plate and the sleeve in sequence. The bottom end of the piston rod is fixedly connected to the valve rod below, and the sleeve is sleeved on the outside of the valve rod or piston rod. The sealing valve mechanism includes a valve stem, a valve seat, and a seal. The upper end of the valve stem is fixedly connected to the bottom end of the piston rod, and the bottom end of the valve stem extends into the valve seat. The seal is disposed at the contact portion between the valve seat and the valve stem and is used to block the communication between the discharge port and the drainage space when the valve is in the blocked state.

7. The built-in sealed osteomineral neutralization wash tank according to claim 5 or 6, characterized in that, The upper drive mechanism also includes a fixed plate, a reinforcing plate, and a sleeve. The fixed plate is connected to the lower part of the mounting plate, and the reinforcing plate is provided on the side of the fixed plate. The sleeve is fixedly connected to the lower part of the fixed plate and the reinforcing plate, and the sleeve is sleeved on the outside of the lifting screw.

8. A method for unloading a built-in sealed osteomin neutralization washing tank as described in any one of claims 1 to 7, characterized in that, Includes the following steps: S1: Neutralization and Washing Stage: Control the internal sealing and unloading opening and closing mechanism to keep the sealing valve mechanism closed at the outlet; add bone meal and treatment liquid into the tank, start the pneumatic stirring and flow aid device, and spray gas towards the center of the tank through the directional spray nozzle. The compressed air moves upward under the action of buoyancy, which drives the bone meal and treatment liquid upward, forming a cavity. The material and liquid on the outside fill the cavity, forming an up-and-down circulating stirring flow field, so that the bone meal is in a fluidized and uniformly mixed state in the bone meal container to accelerate the neutralization or washing reaction; the reaction waste liquid enters the drain space through the sieve holes on the bone meal container and / or the bone meal unloading guide component and is discharged from the drain outlet; repeat the liquid feeding, pneumatic stirring circulation, and drainage operations until the neutralization and washing meet the process requirements; S2: Unloading preparation stage: Stop liquid inlet and drainage, lower the liquid level in the tank to a preset position below the bone mineral layer, start the unloading flushing device, and spray the flushing medium from the lower part of the bone mineral receiving component toward the discharge port to pre-loosen and wet the bone mineral around the discharge port and in the bone mineral unloading guide component. S3: Coordinated Unloading Stage: The unloading flushing device is kept in spray mode, while the air pressure of the pneumatic stirring and flow-aiding device is switched from stirring mode pressure to unloading boosting mode pressure. This allows gas to be sprayed directly towards the center of the discharge port through the directional spray nozzle, forming a centripetal airflow converging towards the discharge port within the bone marrow unloading guide component. This centripetal airflow disrupts bone marrow bridging on one hand and pushes bone marrow towards the discharge port on the other. Then, the internal sealing unloading opening and closing mechanism is driven to switch the sealing valve mechanism from the blocking state to the unloading state. In the material state, the inner port of the discharge port is opened; the flushing medium sprayed by the unloading flushing device forms a fluid flushing force above the discharge port, and the centripetal airflow generated by the pneumatic stirring and flow aid device forms a pneumatic pushing force around the discharge port. Under the synergistic effect of the gas-liquid-solid three phases, the bone extract is collected by the bone extract unloading guide component and discharged through the discharge port under the combined action of gravity, flushing impact force and pneumatic pushing force. Moreover, the sealing valve mechanism is always inside the tank during the opening process, and there are no dead corners in the external pipeline in the bone extract discharge path. S4: Unloading and Reset Stage: After the bone mineral is discharged, the unloading flushing device and the pneumatic stirring and flow aid device are turned off, and the internal sealing unloading opening and closing mechanism is driven to restore the sealing valve mechanism to the blocked state, and the inner port of the discharge port is resealed.

9. The method for internal sealing and unloading of the gelatin bone mineral neutralization washing tank according to claim 11, characterized in that, In S3, the pneumatic stirring and flow aid device starts the unloading boosting mode in advance before the sealing valve mechanism switches to the unloading state, so that the bone powder is in a fluidized anti-bridging state before the discharge port is opened.

10. The method for internal sealing and unloading of the gelatin bone mineral neutralization washing tank according to claim 11, characterized in that, In S3, the unloading flushing device continues to spray after the sealing valve mechanism switches to the unloading state until the bone mineral is completely discharged, so as to use the fluid flushing force of the flushing medium to remove the residual bone mineral on the bone mineral unloading guide component and the inner wall of the discharge port.

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