A lignocellulosic production system
By improving the design of the equipment and the feed pipe in conjunction with the feed plate inside the cooking tank, the problems of manual intervention and blockage in the discharge process of wood fiber production equipment have been solved, realizing automated and efficient discharge and improving production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINYANG MAODU WOOD IND CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-03
AI Technical Summary
Existing wood fiber production equipment is prone to clogging during the discharge process, requiring manual intervention, which is labor-intensive and affects production efficiency.
By using lifting equipment and feed pipes in conjunction with feed plates inside the cooking tank, automated discharge is achieved through high-pressure steam conveying and rotating feed plates. The design of the feed pipes and storage tanks reduces manual intervention and improves discharge efficiency.
It has achieved automation and efficient material output in the wood fiber production process, reduced manual intervention, shortened output time, and improved production efficiency.
Smart Images
Figure CN224451246U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of hygiene product manufacturing equipment, specifically relating to a wood fiber production system. Background Technology
[0002] In the hygiene products manufacturing industry, wood fiber is an important raw material for producing products such as paper or face towels. The production process of wood fiber is usually as follows: First, wood (such as waste planks or tree branches from the construction industry) is washed, crushed and dried to make oven-dried wood; then, the oven-dried wood is put into a cooking equipment, mixed and stirred with a chemical solution at a certain temperature and cooked for a certain period of time, and finally the desired wood fiber is obtained.
[0003] Existing cooking equipment for producing wood fiber (such as steam balls) has shortcomings in operation. Specifically, in the discharge stage after wood fiber preparation, the current methods mostly involve tilting or rotating the equipment for discharge. This process is prone to blockage, and operators often need to manually remove the wood fiber from the equipment using tools such as plows. The entire discharge process requires a lot of manual intervention, is labor-intensive, time-consuming, and severely restricts production efficiency. Summary of the Invention
[0004] This invention addresses the problems of existing cooking equipment requiring manual intervention in both loading and unloading processes, which is time-consuming and labor-intensive. Furthermore, the rotating discharge process is slow and prone to blockages, impacting production efficiency. The invention provides a wood fiber production system that uses lifting and feeding conveying equipment for loading, and guides the wood fiber through a high-pressure system within the cooking tank to discharge it. Residual material is discharged using multiple guide plates within the cooking tank, effectively improving the production efficiency of wood fiber.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A wood fiber production system includes a feeding mechanism, a cooking mechanism, and a collecting mechanism, wherein the feeding mechanism is used to transport raw materials to the cooking mechanism;
[0007] The cooking mechanism includes a cooking tank and a drive device for rotating the cooking tank. The cooking tank has a material inlet at one end and a first material outlet at the other end. The cooking tank also has a second material outlet, a liquid inlet, and at least one steam inlet. The second material outlet is equipped with a discharge pipe with a valve. Multiple guide plates are evenly distributed on the inner wall of the cooking tank for conveying materials along the axial direction of the cooking tank. Steam is introduced into the cooking tank to ensure the temperature and pressure during the wood fiber preparation process. By rotating the cooking tank, the raw materials are stirred in conjunction with the guide plates, and the guide plates are used to achieve complete discharge.
[0008] The collection mechanism includes a guide pipe, a discharge cylinder, and a storage tank. The inlet of the guide pipe corresponds to the discharge pipe, and the outlet is connected to the discharge cylinder. The outlet direction of the guide pipe extends tangentially along the discharge cylinder. The discharge cylinder is fixedly installed in the upper part of the storage tank. The discharge cylinder has a funnel-shaped structure and a cap is provided at its upper end. The storage tank corresponds to the first material outlet of the digester. The wood fibers in the digester are discharged from the guide pipe by the pressure inside the digester. The remaining part is discharged from the first material outlet to the storage tank by rotating the guide plate.
[0009] Preferably, the feeding mechanism includes a hopper, a lifting device, and a feeding conveying device. At least one first screw conveyor is fixedly installed at the bottom of the hopper. The upper part of the first screw conveyor is connected to the hopper, and the discharge end of the first screw conveyor is located above the feed end of the lifting device. The lifting device is used to convey the raw materials in the hopper to the feeding conveying device. The feeding conveying device includes a first frame, on which a trolley is slidably installed. A second screw conveyor is installed on the trolley. The discharge end of the second screw conveyor matches the material inlet. The trolley is used to move the second screw conveyor closer to or away from the material inlet. A funnel-shaped receiving hopper is installed on the upper part of the second screw conveyor. When receiving material, the receiving hopper is located directly below the discharge port of the lifting device. The hopper is used to store raw, dry wood. The raw materials in the hopper are conveyed to the upper part of the lifting device by multiple first screw conveyors and fall into the lifting device. The lifting device conveys the raw materials to the receiving hopper, and the second screw conveyor moves to its discharge end under the drive of the trolley and extends into the material inlet, conveying the material in the receiving hopper to the cooking tank.
[0010] Preferably, the liquid medicine inlet is located close to the material inlet and is connected to a liquid medicine tank via a pipe; multiple steam inlets are provided, and the multiple steam inlets are evenly arranged along the axial direction of the cooking tank, and the steam inlets are connected to a steam generating device; both the material inlet and the first material outlet are provided with opening and closing doors, and the arrangement of multiple steam inlets ensures that the temperature inside the cooking tank is uniform after the steam enters the cooking tank.
[0011] Preferably, a detachable hose is provided between the inlet of the feed pipe and the discharge pipe. After the wood fiber preparation is completed, the feed pipe inlet and the discharge pipe are connected through the hose to achieve initial material discharge and pressure relief.
[0012] Preferably, the feed pipe includes a main pipe, a discharge branch pipe and a feed branch pipe. The main pipe is fixedly installed on one side of the cooking tank. The discharge branch pipe and the feed branch pipe are both connected to the main pipe. The discharge branch pipe is connected to the discharge cylinder.
[0013] The second material outlet may be one or more;
[0014] When there is only one second material outlet, the second material outlet is located in the middle of the cooking tank;
[0015] When there are multiple second material outlets, the multiple second material outlets are arranged along the axial direction of the digester;
[0016] Each second material outlet is equipped with a discharge pipe, and each discharge pipe is equipped with a corresponding feed branch pipe. The feed pipe conveys the material discharged from the discharge pipe to the discharge cylinder.
[0017] Preferably, a second support is provided below the cooking tank, and the cooking tank is rotatably mounted on the second support. A driving device is provided on the second support. The driving device includes a power unit, a gear, and a gear ring. The power unit is fixedly mounted on the second support, and a gear is fixedly mounted on its output end. The power unit is used to drive the gear to rotate. A gear ring is fixedly sleeved on the outside of the cooking tank. The gear ring meshes with the gear. The power unit drives the gear to rotate, thereby causing the gear ring and the cooking tank to rotate.
[0018] Preferably, the plurality of the guide plates are arranged in a spiral shape on the inner wall of the cooking tank.
[0019] A method for producing wood fiber, implemented using the aforementioned wood fiber production system, includes the following steps:
[0020] Feeding steps: The raw materials are fed into the cooking tank through the feeding mechanism, and the medicine is added into the cooking tank through the medicine inlet at the same time;
[0021] After the material is fed, steam is introduced into the digester through the steam inlet to make the pressure inside the digester reach 0.25-0.35 MPa;
[0022] Cooking step: Drive the cooking tank to rotate and cook for 2-3 hours to complete the preparation of wood fiber;
[0023] Discharge procedure: Drive the digester to rotate until the exhaust pipe faces downwards, connect the exhaust pipe and the guide pipe through the hose, open the valve on the discharge pipe, and the digester will be depressurized through the discharge pipe. During the depressurization process, the material in the digester is discharged through the discharge pipe under pressure, and then passes through the guide pipe and the drop cylinder in sequence before falling into the storage tank. The depressurization and discharge of more than half of the material in the digester can be completed in 0.4-0.6 hours.
[0024] Then, the hose is disassembled, the opening and closing door at the first material outlet is opened, and the cooking tank is driven to rotate again, so that the remaining material in the cooking tank is discharged from the first material outlet under the action of multiple guide plates. The discharge time of the remaining material is 1-1.5 hours.
[0025] Preferably, the pressure inside the cooking tank during the feeding step is 0.3 MPa.
[0026] Preferably, the cooking time in the cooking tank during the cooking step is 2.5 hours.
[0027] The beneficial effects of this utility model through the above technical solution are as follows:
[0028] 1. This utility model uses a feeding and conveying device to load materials into the cooking tank, and a lifting device to transport the raw materials (oven-dried sheets) in the hopper to the feeding and conveying device. The entire loading process does not require manual intervention, saving time and effort.
[0029] 2. This utility model introduces steam into the cooking tank, using the steam temperature to heat the oven-dried sheets and the medicinal liquid. At the same time, the steam pressurizes the cooking tank, allowing the medicinal liquid to penetrate into the oven-dried sheets more quickly under high pressure, thereby improving the effect and speed of the medicinal liquid on the oven-dried sheets, accelerating the preparation of wood fibers, and effectively improving production efficiency.
[0030] 3. This utility model utilizes the high-pressure environment inside the cooking tank. After the wood fiber preparation is completed in the cooking tank, most of the wood fiber inside the cooking tank is sprayed out through the feed pipe. At the same time, the pressure in the cooking tank is released and the liquid inside is discharged, which improves the discharge speed and saves time and effort.
[0031] 4. This utility model connects the guide pipe tangentially to the discharge cylinder. The wood fibers discharged from the guide pipe rotate and fall into the storage tank in the discharge cylinder. On the one hand, it buffers and limits the wood fibers sprayed from the guide pipe to prevent them from scattering everywhere. On the other hand, it ensures that the wood fibers are accurately placed in the storage tank. At the same time, the pressure of the spray accelerates the speed at which the wood fibers fall to the bottom of the storage tank (i.e., the falling speed).
[0032] 5. This utility model discharges most of the wood fibers in the digester through the feed pipe while simultaneously depressurizing the digester. Then, the discharge port is opened, the digester is driven to rotate, and multiple feed plates are used to discharge the remaining wood fibers, ensuring thorough discharge.
[0033] 6. This utility model uses evenly distributed guide plates to stir the material when the cooking tank rotates, thereby improving production efficiency. Compared with the existing spiral guide plates, the multiple guide plates arranged at intervals not only ensure the conveying effect of the material during discharge, but also effectively improve the stirring effect.
[0034] 7. This utility model first uses the pressure inside the cooking tank to spray out most of the wood fibers through the guide pipe, and then rotates the cooking tank and the guide plate to discharge the remaining wood fibers from the first material outlet. Compared with the existing method of discharging all materials through the spiral guide plate, the time is reduced from 4 hours to about 1.5-2 hours, which improves the discharge efficiency. Attached Figure Description
[0035] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .
[0036] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .
[0037] Figure 3 This is a schematic diagram of the structure of the feeding and conveying equipment of this utility model. Figure 1 .
[0038] Figure 4 This is a schematic diagram of the structure of the feeding and conveying equipment of this utility model. Figure 2 .
[0039] Figure 5 This is a schematic diagram of the feeding mechanism of this utility model. Figure 1 .
[0040] Figure 6 This is a schematic diagram of the feeding mechanism of this utility model. Figure 2 .
[0041] Figure 7 This is a schematic diagram of the feeding and conveying equipment of this utility model when feeding materials into the cooking tank. Figure 1 .
[0042] Figure 8 This is a schematic diagram of the feeding and conveying equipment of this utility model when feeding materials into the cooking tank. Figure 2 .
[0043] Figure 9 This is a schematic diagram of the structure of the cooking tank and the collection mechanism of this utility model. Figure 1 .
[0044] Figure 10 This is a schematic diagram of the structure of the cooking tank and the collection mechanism of this utility model. Figure 2 .
[0045] Figure 11 This is a top view schematic diagram of the connection between the discharge branch pipe and the discharge cylinder of this utility model.
[0046] Figure 12 This is a schematic diagram of the structure of the cooking tank of this utility model. Figure 1 .
[0047] Figure 13 This is a schematic diagram of the structure of the cooking tank of this utility model. Figure 2 .
[0048] The attached diagram is labeled as follows: 1 is the hopper, 11 is the first screw conveyor, 2 is the lifting equipment, 3 is the feeding conveyor, 31 is the first frame, 32 is the trolley, 33 is the second screw conveyor, and 34 is the receiving hopper.
[0049] 4 is a cooking tank, 41 is a material inlet, 42 is a first material outlet, 43 is a guide plate, 44 is a discharge pipe, 45 is a second support, 46 is a power unit, 47 is a gear, and 48 is a gear ring.
[0050] 5 is the feed pipe, 51 is the main pipe, 52 is the discharge branch pipe, 53 is the feed branch pipe, 6 is the discharge cylinder, 61 is the cover, and 7 is the storage tank. Detailed Implementation
[0051] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:
[0052] like Figures 1 to 13 As shown, this embodiment provides a wood fiber production system, including a feeding mechanism, a cooking mechanism, and a collecting mechanism. The feeding mechanism is used to transport raw materials to the cooking mechanism. The feeding mechanism includes a silo 1, a lifting device 2, and a feeding conveying device 3. The silo 1 is used to store or temporarily place raw materials (i.e., oven-dried sheets). The outlet of the silo 1 corresponds to the inlet of the lifting device 2. Specifically, the upper opening of the feeding end of the lifting device 2 serves as the feeding port, and the feeding port is located below the outlet of the silo 1. At least one first screw conveyor 11 is fixedly installed at the bottom of the silo 1. The upper part of the first screw conveyor 11 is connected to the silo 1. The discharge end of the first screw conveyor 11 is located above the feeding end of the lifting device 2. Multiple first screw conveyors 11 extend along the length of the silo 1, and their drive motors are fixedly installed on the outside of the silo 1. The raw materials in the silo are transported to the feeding end of the lifting device 2 through multiple first screw conveyors 11.
[0053] The lifting device 2 is used to transport the raw materials in the silo 1 to the feeding conveying device 3. The lifting device 2 is an inclined screw feeder, mounted on a corresponding support frame. The feeding conveying device 3 is used to transport the raw materials to the cooking mechanism. The feeding conveying device 3 includes a first frame 31, on which a trolley 32 is slidably mounted. A motor is installed in the trolley 32 to drive its movement. A second screw conveyor 33 is mounted on the trolley 32. The discharge end of the second screw conveyor 33 matches the material inlet 41. Specifically, the diameter of the discharge end of the second screw conveyor 33 corresponds to the inner diameter of the material inlet 41. Figure 7-8As shown, when the cooking tank 4 is being filled, the discharge end of the second screw conveyor 33 extends into the material inlet 41 to convey material into the cooking tank 4. The trolley 32 is used to drive the second screw conveyor 33 closer to or further away from the material inlet 41. Specifically, a track is provided on the first frame 31, and the track is matched with the wheels of the trolley 32 to guide and limit the movement of the trolley 32. A funnel-shaped receiving hopper 34 is provided on the upper part of the second screw conveyor 33. When receiving material, the receiving hopper 34 is located directly below the discharge port of the lifting device 2. The discharge end of the lifting device 2 is open at the lower side. The dry sheets conveyed by the lifting device 2 fall from this outlet into the receiving hopper 34 and are conveyed into the cooking tank 4 under the action of the second screw conveyor 33.
[0054] like Figure 3-6 As shown, in one possible implementation, a first baffle is fixedly installed above the side of the receiving hopper 34 away from the material inlet 41, and a second baffle is fixedly installed above the side of the receiving hopper 34 away from the lifting device 2. The second baffle is inclined outward. The first baffle and the second baffle effectively ensure that the receiving hopper 34 receives the dry sheets conveyed by the lifting device 2. It should be noted that in order to avoid interference between the second screw conveyor 33 and the lifting device 2 when it moves, no baffle structure is installed above the other two sides of the receiving hopper 34.
[0055] The cooking mechanism includes a cooking tank 4 and a drive device for rotating the cooking tank 4. The cooking tank 4 includes a cylindrical body and end caps at both ends. The inner diameter of the cooking tank 4 is 2.6m, the length of the cylindrical body is 10.5m, and the length including the end caps is 11.832m. A second support 45 is provided below the cooking tank 4, and the cooking tank 4 is rotatably mounted on the second support 45. Specifically, a support guide ring is fixedly sleeved on the outer wall of the cooking tank 4, and support wheels are rotatably mounted on the second support 45. The support wheels correspond to the support guide rings, and at least two support guide rings are provided. Each support guide ring is provided with at least two support wheels. The support wheels cooperate with the support guide rings to achieve... The cooking tank 4 is now rotated and supported. A driving device is installed on the second bracket 45. The driving device includes a power unit 46, a gear 47, and a gear ring 48. The power unit 46 is fixedly installed on the second bracket 45, and the gear 47 is fixedly installed at its output end. The power unit 46 is a motor or a motor with a reducer. The power unit 46 is used to drive the gear 47 to rotate. The gear ring 48 is fixedly sleeved on the outside of the cooking tank 4. The gear ring 48 meshes with the gear 47. The power unit 46 drives the gear 47 to rotate, which in turn drives the gear ring 48 to rotate with the cooking tank 4, thereby agitating the dry wood and the medicinal liquid inside and ensuring full contact between the dry wood and the medicinal liquid.
[0056] The cooking tank 4 has a material inlet 41 at one end and a first material outlet 42 at the other end. Both the material inlet 41 and the first material outlet 42 are equipped with opening and closing doors. These doors seal the material inlet 41 and the first material outlet 42, ensuring a tight seal inside the cooking tank 4. Opening the corresponding doors allows for feeding and discharging of materials into the cooking tank 4. Multiple guide plates 43 are evenly distributed on the inner wall of the cooking tank 4 for conveying materials along the axial direction of the cooking tank 4. These guide plates 43 are spirally arranged on the inner wall of the cooking tank 4, with each guide plate 43 having a different inclination direction. The guide plate 43 is 20cm high along the radial direction of the cooking tank 4 (i.e., the distance from the inner side of the guide plate 43 to the inner wall of the cooking tank 4). On the one hand, the multiple guide plates 43 improve the stirring effect of the material inside the cooking tank 4 when it rotates. On the other hand, after the cooking tank 4 completes the discharge and depressurization through the guide pipe 5, the opening and closing door at the first material outlet 42 is opened, driving the cooking tank 4 and the multiple guide plates 43 inside to rotate. The multiple guide plates 43 cooperate with the cooking tank 4 to form a spiral conveying mechanism, which discharges the residual material in the cooking tank 4 through the first material outlet 42.
[0057] The cooking tank 4 is also equipped with a second material outlet, a liquid inlet, and at least one steam inlet. The second material outlet is equipped with a discharge pipe 44, which is fitted with a valve. After the wood fiber is prepared in the cooking tank 4, the cooking tank 4 is rotated until the discharge pipe 44 is below it. The valve is then opened, and the water and liquid mixture in the cooking tank 4 is sprayed out from the discharge pipe 44 under the steam pressure. At the same time, the wood fiber generated inside is also sprayed out from the discharge pipe 44 to achieve discharge, thus completing the depressurization work in the cooking tank 4. Utilizing the pressure inside the cooking tank 4, the sprayed wood fiber material can reach more than half of the material in the cooking tank 4.
[0058] The liquid inlet is located near the material inlet 41 and is connected to a liquid tank via a pipe. When the dried sheets are fed into the digester 4, the liquid in the liquid tank is simultaneously pumped to the liquid inlet. As the dried sheets are continuously fed in, the liquid is also fed in, allowing the liquid and dried sheets to be fed in synchronously and to make full contact, which is conducive to subsequent reaction. Multiple steam inlets are set up and evenly arranged along the axial direction of the digester 4. The steam inlets are connected to a steam generating device, which is a steam generator or surplus steam from a boiler plant or other production system. This allows for the utilization of waste heat while producing wood fiber, reducing production costs. After the digester 4 is filled, the material inlet 41 is sealed, and steam at a temperature of about 80-100℃ is input into the digester 4. The steam is continuously supplied until the pressure inside the digester 4 is about 0.3 MPa, at which point the steam supply is stopped. Then the digester 4 is driven to rotate to stir the material inside for 2-3 hours to produce wood fiber. Steam is supplied simultaneously through multiple steam inlets to ensure uniform temperature distribution inside the digester 4.
[0059] In one possible implementation, a gas supply pipe is fixedly installed on the inner wall of the cooking tank 4. The gas supply pipe has multiple steam inlets evenly distributed along the axial direction of the cooking tank 4. One end of the gas supply pipe extends into the cooking tank 4 and is closed at the end, while the other end extends out of the cooking tank 4 and is connected to a quick-release connector. The quick-release connector is connected to a steam generating device through a pipe to supply steam into the cooking tank 4. A valve is installed on the part of the gas supply pipe that extends out of the cooking tank 4. Before driving the cooking tank 4 to rotate, the valve on the gas supply pipe is closed to prevent gas leakage. Then, the pipe connected to the quick-release connector is removed to prevent the pipe from interfering with the cooking tank 4.
[0060] It should be noted that due to heat loss during the transportation process and other reasons, the temperature inside the cooking tank 4 is 60-80℃ during actual production.
[0061] The collection mechanism includes a guide pipe 5, a discharge cylinder 6, and a storage tank 7. The inlet of the guide pipe 5 corresponds to the discharge pipe 44, and the outlet is connected to the discharge cylinder 6. The outlet direction of the guide pipe 5 extends tangentially along the discharge cylinder 6. A detachable hose is provided between the inlet of the guide pipe 5 and the discharge pipe 44. Specifically, when the cooking tank 4 is rotating, the hose is not installed, that is, the hose is not connected to the discharge pipe 44. After the cooking tank 4 stops rotating, the flanges at both ends of the hose are connected to the discharge pipe 44 and the inlet of the guide pipe 5, respectively. Then, the valve is opened to discharge the material. The outlet of the guide pipe 5 is tangentially connected to the discharge cylinder 6. The discharge cylinder 6 is fixedly installed in the upper part of the storage tank 7. The material in the guide pipe 5 is transported to the discharge cylinder 6 and falls into the storage tank 7 for storage. The discharge cylinder 6 has a funnel-shaped structure and a cap 61 is provided at its upper end. The cap 61 limits the material entering the discharge cylinder 6 to ensure that it falls into the storage tank 7.
[0062] In one possible implementation, the feed pipe 5 includes a main pipe 51, a discharge branch pipe 52, and a feed branch pipe 53. The main pipe 51 is fixedly installed on one side of the cooking tank 4. Specifically, the main pipe 51 is fixedly installed on the ground by multiple support brackets. The discharge branch pipe 52 and the feed branch pipe 53 are both connected to the main pipe 51. The discharge branch pipe 52 is connected to the discharge cylinder 6. Specifically, the discharge branch pipe 52 is tangentially connected to the discharge cylinder 6 and communicates with the inside of the discharge cylinder 6. The material enters the discharge cylinder 6 tangentially, and after its impact force is relieved in the discharge cylinder 6, it falls into the storage tank 7.
[0063] The second material outlet may be one or more;
[0064] When there is only one second material outlet, the second material outlet is located in the middle of the cooking tank 4; the liquid (mainly referring to the residual medicine liquid and a small amount of water liquefied by steam in the cooking tank 4) and most of the material in the cooking tank 4 are discharged through one second material outlet;
[0065] When there are multiple second material outlets, the multiple second material outlets are arranged along the axis of the digester 4. The liquid in the digester 4 is discharged through two second material outlets, and the material in different positions in the digester 4 is discharged at the same time.
[0066] Each second material outlet is equipped with a discharge pipe 44, and each discharge pipe 44 is equipped with a corresponding feed branch pipe 53. When discharging the material in the cooking tank 4, each discharge pipe 44 and the corresponding feed branch pipe 53 are connected by a flexible hose.
[0067] At least one discharge pipe 44 is provided. The discharge pipe 44 is arranged along the axial direction of the cooking tank 4 and is connected to the corresponding feed branch pipe 53 through a flexible hose. When there is one discharge pipe 44, there is one feed branch pipe 53. At this time, the discharge pipe 44 is located near the middle of the cooking tank 4.
[0068] When multiple discharge pipes 44 are provided (taking two as an example), the two discharge pipes 44 are located on the outer peripheral sidewalls at both ends of the cooking tank 4. Correspondingly, two feed branch pipes 53 are provided. When discharging, the two feed branch pipes 53 are connected to the corresponding discharge pipes 44 in sequence to realize the discharge of materials from different positions in the cooking tank 4.
[0069] The storage tank 7 corresponds vertically to the first material outlet 42 of the cooking tank 4. After most of the material and liquid in the cooking tank 4 are discharged through the guide pipe 5, the pressure in the cooking tank 4 is also released. Then, the opening and closing door at the first material outlet 42 is opened, and the cooking tank 4 is driven to rotate. With the help of multiple guide plates 43 in the cooking tank 4, the remaining material (wood fiber) in the cooking tank 4 is discharged and falls into the storage tank 7, thus completing the discharge work of the cooking tank 4.
[0070] In use, the feeding process of the cooking tank 4 is carried out first, as follows: First, the opening and closing door at the material inlet 41 is opened, and the trolley 32 drives the second screw conveyor 33 to move towards the material inlet 41 until the discharge end of the second screw conveyor 33 extends into the material inlet 41 and into the cooking tank 4. Then, the first screw conveyor 11, the lifting device 2 and the second screw conveyor 33 are started at the same time. The dry tablets in the hopper 1 are first conveyed to the lifting device 2 by the first screw conveyor 11 and then to the receiving hopper 34 by the lifting device 2. Under the action of the second screw conveyor 33, they are conveyed to the cooking tank 4. At the same time as the dry tablets are being fed, the liquid medicine in the liquid medicine tank is pumped into the cooking tank 4 in proportion.
[0071] After feeding is completed, close the opening and closing door at material inlet 41 to ensure that the cooking tank 4 is sealed. Then, supply steam into the cooking tank 4 until the pressure inside the cooking tank 4 reaches about 0.3 MPa, thus completing the preparation work before preparation.
[0072] Cooking process: Start the power unit 46 to drive the cooking tank 4 to rotate. Under the stirring action of the rotating guide plate 43 of the cooking tank 4, the medicine liquid comes into full contact with the oven-dried sheets. Under high pressure, the medicine liquid penetrates into the oven-dried sheets more quickly. The cooking tank 4 rotates for 2-3 hours to complete the preparation of wood fiber.
[0073] Discharge process: Rotate the digester 4 until the discharge pipe 44 is below it. Connect one of the discharge pipes 44 to the corresponding feed branch pipe 53 through a hose. Open the corresponding valve. Under high pressure, the liquid and wood fiber at one end of the digester 4 pass through the corresponding discharge pipe 44 and the guide pipe 5 in sequence and enter the discharge cylinder 6. Under the action of the discharge cylinder 6, it falls downward into the storage tank 7 for storage. Then close the valve to discharge the liquid and more than half of the wood fiber in the digester 4. At the same time, the pressure relief work of the digester 4 is completed.
[0074] Then the hose is removed, the corresponding opening and closing door of the first material outlet 42 is opened, and the cooking tank 4 is driven to rotate again. Under the action of multiple guide plates 43 inside, the remaining wood fibers are discharged into the storage tank 7, completing the discharge work.
[0075] A method for producing wood fiber, implemented through the aforementioned wood fiber production system, includes the following steps:
[0076] The feeding process involves feeding the raw materials into the cooking tank 4 through the feeding mechanism, while simultaneously feeding the medicinal liquid into the cooking tank 4 through the medicinal liquid inlet.
[0077] After the material is fed, steam is introduced into the digester 4 through the steam inlet to make the pressure inside the digester 4 reach 0.25-0.35 MPa;
[0078] Furthermore, the pressure inside the cooking tank 4 during the feeding step is 0.3 MPa.
[0079] In the cooking step, the driving equipment drives the cooking tank 4 to rotate, and after cooking for 2-3 hours, the preparation of wood fiber is completed;
[0080] Furthermore, the cooking time in the cooking tank 4 during the cooking step is 2.5 hours;
[0081] As one possible implementation, the outer wall of the cooking tank 4 is provided with a heat insulation layer to reduce the loss of steam heat, so that the temperature inside the cooking tank 4 is 60-70℃ during the cooking process.
[0082] In the discharge step, drive the digester 4 to rotate until the exhaust pipe 44 faces downward. Connect the exhaust pipe 44 to the guide pipe 5 through a hose. Open the valve on the discharge pipe 44. The digester 4 is depressurized through the discharge pipe 44. During the depressurization process, the material in the digester 4 falls into the storage tank 7 through the guide pipe 5 and the discharge cylinder 6 under pressure. The depressurization and discharge of more than half of the material in the digester 4 can be completed in 0.4-0.6 hours.
[0083] Furthermore, the material is sprayed out through the feed pipe 5 into the cooking tank 4 to stabilize the pressure, and the spraying time is about 0.5 hours.
[0084] Then, the hose is disassembled, the opening and closing door at the first material outlet 42 is opened, and the cooking tank 4 is driven to rotate again for 1-1.5 hours, so that the remaining material in the cooking tank 4 is discharged from the first material outlet 42 under the action of multiple guide plates 43. The discharge time of the remaining material is 1-1.5 hours.
[0085] The embodiments described above are merely preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the patent claims of this utility model should be included within the scope of the patent application of this utility model.
Claims
1. A lignocellulosic production system, characterized in that, It includes a feeding mechanism, a cooking mechanism, and a collecting mechanism, wherein the feeding mechanism is used to transport raw materials to the cooking mechanism; The cooking mechanism includes a cooking tank (4) and a driving device for driving the cooking tank (4) to rotate. The cooking tank (4) has a material inlet (41) at one end and a first material outlet (42) at the other end. The cooking tank is also provided with a second material outlet, a liquid inlet and at least one steam inlet. The second material outlet is provided with a discharge pipe (44) and a valve is provided on the discharge pipe (44). Multiple guide plates (43) are evenly distributed on the inner wall of the cooking tank (4) for conveying materials along the axial direction of the cooking tank (4). The collection mechanism includes a guide pipe (5), a discharge cylinder (6), and a storage tank (7). The inlet of the guide pipe (5) corresponds to the discharge pipe (44), and the outlet is connected to the discharge cylinder (6). The outlet direction of the guide pipe (5) extends tangentially along the discharge cylinder (6). The discharge cylinder (6) is fixedly installed in the upper part of the storage tank (7). The discharge cylinder (6) has a funnel-shaped structure and a cap (61) is provided at its upper end. The storage tank (7) corresponds to the first material outlet (42) of the cooking tank (4).
2. A lignocellulosic production system according to claim 1, characterized in that The feeding mechanism includes a hopper (1), a lifting device (2) and a feeding conveying device (3). At least one first screw conveyor (11) is fixedly installed at the bottom of the hopper (1). The upper part of the first screw conveyor (11) is connected to the hopper (1). The discharge end of the first screw conveyor (11) is located above the feed end of the lifting device (2). The lifting device (2) is used to transport the raw materials in the silo (1) to the feeding conveyor (3); The feeding and conveying equipment (3) includes a first frame (31), on which a trolley (32) is slidably mounted. A second screw conveyor (33) is mounted on the trolley (32). The discharge end of the second screw conveyor (33) is matched with the material inlet (41). The trolley (32) is used to drive the second screw conveyor (33) to approach or move away from the material inlet (41). A funnel-shaped receiving hopper (34) is mounted on the upper part of the second screw conveyor (33). When receiving material, the receiving hopper (34) is located directly below the discharge port of the lifting equipment (2).
3. A lignocellulosic production system according to claim 1, c h a r a c t e r i z e d in that The liquid medicine inlet is located close to the material inlet (41) and the liquid medicine inlet is connected to the liquid medicine tank through a pipe; The steam inlet is configured as multiple, and the multiple steam inlets are evenly arranged along the axial direction of the cooking tank (4). The steam inlet is connected to a steam generating device. Both the material inlet (41) and the first material outlet (42) are equipped with opening and closing doors.
4. A lignocellulosic production system according to claim 1, characterized in that A detachable hose is provided between the inlet of the feed pipe (5) and the discharge pipe (44).
5. A wood fiber production system according to claim 4, characterized in that, The feed pipe (5) includes a main pipe (51), a discharge branch pipe (52) and a feed branch pipe (53). The main pipe (51) is fixedly installed on one side of the cooking tank (4). The discharge branch pipe (52) and the feed branch pipe (53) are both connected to the main pipe (51). The discharge branch pipe (52) is connected to the discharge cylinder (6). The second material outlet may be one or more; When there is only one second material outlet, the second material outlet is located in the middle of the cooking tank (4); When there are multiple second material outlets, the multiple second material outlets are arranged along the axial direction of the cooking tank (4); Each second material outlet is equipped with a discharge pipe (44), and each discharge pipe (44) is equipped with a corresponding feed branch pipe (53).
6. A lignocellulosic production system according to claim 1, characterized in that A second support (45) is provided below the cooking tank (4). The cooking tank (4) is rotatably mounted on the second support (45). A driving device is provided on the second support (45). The driving device includes a power unit (46), a gear (47), and a gear ring (48). The power unit (46) is fixedly mounted on the second support (45), and a gear (47) is fixedly mounted on its output end. The power unit (46) is used to drive the gear (47) to rotate. A gear ring (48) is fixedly sleeved on the outside of the cooking tank (4). The gear ring (48) meshes with the gear (47).
7. A lignocellulosic production system according to claim 1, characterized in that Multiple guide plates (43) are arranged in a spiral shape on the inner wall of the cooking tank (4).