A drum digester discharge system
By introducing steam pressurization into the drum digester and utilizing the guide plate and guide pipe system, the problem of easy clogging at the discharge of the drum digester was solved, realizing automated discharge, improving production efficiency and reducing labor intensity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINYANG HONGDU PAPER CO LTD
- Filing Date
- 2025-06-20
- Publication Date
- 2026-07-03
AI Technical Summary
Existing drum cookers are prone to clogging during the discharge process, requiring manual intervention, which is labor-intensive and seriously affects production efficiency.
By inputting steam into the cooker for pressurization, and utilizing the guide plate and guide pipe system, efficient material conveying and discharge are achieved. Combined with the rotation of the cooker, automated material discharge is completed.
It improved material discharge efficiency, reduced manual intervention, lowered labor intensity, and shortened discharge time from 4 hours to 1.5-2 hours.
Smart Images
Figure CN224451247U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of sanitary product manufacturing equipment, specifically relating to a drum cooker discharge 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 rotary drum digesters for producing wood fibers have 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, often requiring operators to manually remove the wood fibers from the equipment using tools such as plows. The entire discharge process requires significant manual intervention, is labor-intensive, time-consuming, and severely restricts production efficiency. Summary of the Invention
[0004] This invention addresses the problem that existing drum digesters often use tilting or rotating equipment for discharging, a process prone to blockages. Operators frequently need to manually remove the wood fibers using tools like pry bars, resulting in a labor-intensive, time-consuming, and inefficient process that severely hinders production. This invention provides a drum digester discharge system that pressurizes the digester with steam, improving the mixing of the medicinal liquid. During discharge, most of the material is first sprayed out through a pipe, with the remaining material discharged via rotation, effectively increasing discharge efficiency.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A discharge system for a drum cooker is provided for discharging material from the cooker. The cooker has a material inlet at one end and a first material outlet at the other end. The cooker also has a second material outlet with a discharge pipe and a valve. Multiple guide plates are evenly distributed on the inner wall of the cooker for conveying material along the axial direction of the cooker. By rotating the cooker, the guide plates can be used to convey the material inside the cooker to the first material outlet for discharge.
[0007] A gas supply pipe is fixedly installed on the inner wall of the steam cooker. Multiple steam inlets are evenly distributed along the length of the steam cooker on the gas supply pipe. One end of the gas supply pipe is closed and the other end extends out of the steam cooker and is connected to a quick-release connector. Steam can be delivered to multiple points in the steam cooker at the same time through the gas supply pipe to ensure that the temperature and pressure inside the steam cooker are balanced.
[0008] A feed pipe is provided on one side of the cooker. The feed inlet of the feed pipe corresponds to the discharge pipe. A flexible hose is detachably provided between the feed inlet of the feed pipe and the discharge pipe. The feed pipe guides and conveys the material sprayed from the discharge pipe.
[0009] Preferably, the gas pipeline is connected to a steam generator via a quick-release connector.
[0010] Preferably, a storage tank is provided below the first material outlet of the cooker, and a discharge cylinder is fixedly provided on the inner side wall of the storage tank. The discharge end of the guide pipe is connected to the discharge cylinder, and the outlet direction of the guide pipe extends tangentially along the discharge cylinder. The discharge cylinder has a funnel-shaped structure and a cap is provided at its upper end. The guide pipe sprays material into the discharge cylinder and then the material falls into the storage tank through the discharge cylinder.
[0011] Preferably, a support is provided below the cooker, the cooker is rotatably mounted on the support, and a power device for driving the cooker to rotate is also provided on the support. When the cooker rotates, it stirs and cooks the material inside.
[0012] Preferably, the power unit includes a motor, a gear, and a gear ring. The motor is fixedly mounted on the bracket, and the output end of the motor is fixedly connected to the gear. The gear ring, which meshes with the gear, is fixedly fitted on the cooker. The motor drives the gear and the gear ring to rotate, thereby causing the cooker to rotate.
[0013] Preferably, the multiple guide plates are arranged in a spiral shape on the inner wall of the cooker to ensure the material conveying effect.
[0014] Preferably, both the material inlet and the first material outlet are equipped with opening and closing doors, which are closed during the cooking process of the cooker to ensure a seal.
[0015] Preferably, the cooker is provided with a liquid inlet, which is located close to the material inlet and is connected to a liquid tank via a pipe. When the cooker is fed, the liquid is pumped into the tank simultaneously.
[0016] 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 cooker. 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.
[0017] The second material outlet may be one or more;
[0018] When there is only one second material outlet, the second material outlet is located in the middle of the cooker;
[0019] When there are multiple second material outlets, the multiple second material outlets are arranged along the axial direction of the cooker;
[0020] Each secondary material outlet is equipped with a discharge pipe, and each discharge pipe is equipped with a corresponding feed branch pipe.
[0021] The beneficial effects of this utility model through the above technical solution are as follows:
[0022] 1. This utility model increases the internal pressure of the cooker by supplying steam into it, while ensuring the cooking temperature, making it easier for the medicine to penetrate into the dry tablets and improving the preparation efficiency.
[0023] Meanwhile, after the material preparation in the cooker is completed, most of the material in the cooker is sprayed out through the feed pipe, and the pressure in the cooker is released, which increases the discharge speed and saves time and effort.
[0024] 2. This utility model connects the discharge pipe and the guide pipe through a flexible hose, and then uses the guide pipe to guide and transport the material sprayed from the discharge pipe to the storage tank for collection and utilization.
[0025] 3. This utility model connects the guide pipe tangentially to the discharge cylinder. The material discharged from the guide pipe rotates and falls into the storage tank in the discharge cylinder. On the one hand, it buffers and limits the material sprayed from the guide pipe to prevent it from scattering everywhere. On the other hand, it ensures that the material is accurately positioned in the storage tank. At the same time, the pressure of the spray accelerates the speed at which the material falls to the bottom of the storage tank (i.e., the falling speed).
[0026] 4. This utility model discharges most of the material in the cooker through the feed pipe and simultaneously depressurizes the cooker. Then, the discharge port is opened, the cooker is driven to rotate, and multiple feed plates are used to discharge the remaining material, ensuring thorough discharge.
[0027] 5. This utility model uses evenly distributed guide plates to stir the material when the cooker rotates, thereby improving production efficiency. Due to the spaced arrangement of the guide plates, compared with the existing spiral guide plates, the spaced multiple guide plates effectively improve the stirring effect while ensuring the material conveying effect during discharge.
[0028] 6. This utility model first uses the pressure inside the cooker to spray out most of the material through the guide pipe, and then rotates the cooker and guide plate to discharge the remaining material from the first material outlet. Compared with the existing method of discharging all the material 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
[0029] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .
[0030] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .
[0031] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 3 .
[0032] Figure 4 This is a schematic diagram of the structure of the steaming device of this utility model. Figure 1 .
[0033] Figure 5 This is a schematic diagram of the structure of the steaming device of this utility model. Figure 2 .
[0034] Figure 6 This is a schematic diagram of the connection between the guide tube and the discharge cylinder of this utility model.
[0035] The attached diagram is labeled as follows: 1 is the cooker, 2 is the material inlet, 3 is the first material outlet, 4 is the discharge pipe, 5 is the guide plate, 6 is the air supply pipe, 7 is the guide pipe, 8 is the storage tank, 9 is the discharge cylinder, 10 is the cover, 11 is the support, 12 is the motor, 13 is the gear, and 14 is the gear ring. Detailed Implementation
[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:
[0037] like Figures 1-6As shown, this embodiment provides a drum digester discharge system for discharging material from a digester 1. The digester 1 includes a cylinder and end caps at both ends. The inner diameter of the digester 1 is 2.6m, the length of the cylinder is 10.5m, and the length including the end caps is 11.832m. A support 11 is provided below the digester 1, and the digester 1 is rotatably mounted on the support 11. Specifically, a support guide ring is fixedly sleeved on the outer wall of the digester 1, and support wheels are rotatably mounted on the frame 11. The support wheels correspond to the support guide rings, and at least two support guide rings are provided. Each support guide ring is correspondingly provided with at least two support wheels. The support wheels and support guide rings are connected to the support guide rings. The ring mechanism enables the rotational installation and support of the cooker 1; the support 11 is also equipped with a power device for driving the cooker to rotate. The power device includes a motor 12, a gear 13 and a gear ring 14. The motor 12 is fixedly installed on the support 11. The output end of the motor 12 is fixedly connected to the gear 13. Alternatively, the output end of the motor 12 can be connected to a reducer, and the output end of the reducer can be connected to the gear 13. The gear ring 14, which meshes with the gear 13, is fixedly fitted on the cooker 1. The motor 12 drives the gear 13 to rotate, which in turn drives the gear ring 14 and the cooker 1 to rotate, thereby stirring the materials inside and ensuring that the dried tablets and the medicine liquid are fully mixed and in contact.
[0038] The cooker 1 has a material inlet 2 at one end and a first material outlet 3 at the other end. The material inlet 2 is used to convey dry sheets into the cooker 1. Both the material inlet 2 and the first material outlet 3 are equipped with opening and closing doors. By sealing the material inlet 2 and the first material outlet 3, the cooker 1 is kept airtight. By opening the corresponding opening and closing doors, the cooker 1 can be filled and discharged. A plurality of guide plates 7 are evenly distributed on the inner wall of the cooker 1 for conveying materials along the axial direction of the cooker 1. The plurality of guide plates 7 are spirally arranged on the inner wall of the cooker 1 and are inclined. The guide plates 7 are placed in the same direction of inclination, and the height of the guide plates 7 in the radial direction of the cooker 1 is 20cm (that is, the distance from the inner side of the guide plate 7 to the inner wall of the cooker 1). On the one hand, the multiple guide plates 7 arranged at intervals improve the stirring effect of the material inside the cooker 1 when it rotates. On the other hand, after the cooker 1 completes the discharge and depressurization through the guide pipe 7, the opening and closing door at the first material outlet 3 is opened, driving the cooker 1 and the multiple guide plates 7 inside to rotate. The multiple guide plates 7 cooperate with the cooker 1 to form a spiral conveying mechanism, and discharge the residual material in the cooker 1 through the first material outlet 3.
[0039] The cooker 1 is equipped with a liquid medicine inlet, which is located close to the material inlet 2 and is connected to a liquid medicine tank through a pipe. When the dry tablets are added into the cooker 1 through the material inlet 2, the liquid medicine is simultaneously pumped into the cooker 1 through the liquid medicine inlet.
[0040] Furthermore, the digester 1 is also equipped with a second material outlet, which is equipped with a discharge pipe 4. The discharge pipe 4 is equipped with a valve. After the wood fiber preparation is completed in the digester 1, the digester 1 is rotated until the discharge pipe 4 is below it. The valve is opened, and the material in the digester 1 (the material includes a mixture of steam-liquefied water and residual medicine, and the prepared wood fiber) is sprayed out from the discharge pipe 4 under the action of steam pressure in the digester 1 to achieve discharge. Utilizing the pressure in the digester 1, the sprayed wood fiber material can reach more than half of the material in the digester 1, and at the same time, the depressurization work in the digester 1 is completed.
[0041] like Figure 4 As shown, a gas supply pipe 6 is fixedly installed on the inner wall of the digester 1. The gas supply pipe 6 has multiple steam inlets evenly distributed along the length of the digester 1. One end of the gas supply pipe 6 is closed, and the other end extends out of the digester 1 and is connected to a quick-release connector. The gas supply pipe 6 is connected to a steam generating device through the quick-release connector. The steam generating device is surplus steam from a steam generator or boiler plant or other production system, thereby realizing waste heat utilization while producing wood fiber, reducing production costs. After the digester 1 is filled with material, the material inlet 2 is sealed, and steam is introduced into the digester 1 until the pressure inside the digester 1 is about 0.3 MPa. Steam supply is then stopped, and the digester 1 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 1.
[0042] A valve (not shown in the figure) is installed on the portion of the gas supply pipe 6 that extends out of the cooker 1. Before driving the cooker 1 to rotate, the valve on the gas supply pipe is closed to prevent gas leakage. Then, the pipe connected by the quick-release connector is disconnected to prevent the pipe from interfering with the cooker 1.
[0043] A feed pipe 7 is provided on one side of the cooker 1. The feed inlet of the feed pipe 7 corresponds to the discharge pipe 4. A flexible hose is detachably provided between the feed inlet of the feed pipe 7 and the discharge pipe 4. Specifically, when the cooker 1 is cooking the material inside, the flexible hose is not installed because the cooker 1 is rotating, that is, the flexible hose is not connected to the discharge pipe 4 to avoid interference. After the cooker 1 stops rotating, the flanges at both ends of the flexible hose are connected to the discharge pipe 4 and the inlet of the feed pipe 7, respectively. Then the valve is opened to discharge the material inside the cooker 1.
[0044] A storage tank 8 is provided below the first material outlet of the cooker 1. A discharge cylinder 9 is fixedly installed on the inner wall of the storage tank 8. The discharge end of the guide pipe 7 is connected to the discharge cylinder 9. The outlet direction of the guide pipe 7 extends tangentially along the discharge cylinder 9. The material in the guide pipe 7 is transported to the discharge cylinder 9 and falls into the storage tank 8 for storage. The discharge cylinder 9 has a funnel-shaped structure and a cap 10 is provided at its upper end. The cap 10 limits the material entering the discharge cylinder 9 to prevent it from splashing upwards out of the discharge cylinder 9 and ensures that it falls into the storage tank 8.
[0045] The feed pipe 7 includes a main pipe, a discharge branch pipe, and a feed branch pipe. The main pipe is fixedly installed on one side of the cooker 1. Specifically, the main pipe is fixedly installed on the ground by multiple support brackets. 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 9. Specifically, the discharge branch pipe is tangentially connected to the discharge cylinder 9 and communicates with the inside of the discharge cylinder 9. The material enters the discharge cylinder 9 tangentially, and after the impact force is relieved in the discharge cylinder 9, it spirals down into the storage tank 8.
[0046] The second material outlet may be one or more;
[0047] When there is only one second material outlet, the second material outlet is located in the middle of the cooker 1; most of the material in the cooker 1 is discharged through one second material outlet.
[0048] When there are multiple second material outlets, the multiple second material outlets are arranged along the axial direction of the cooker 1. The liquid in the cooker 1 is discharged through two second material outlets, and the material in different positions in the cooker 1 is discharged at the same time.
[0049] Each second material outlet is equipped with a discharge pipe 4, and each discharge pipe 4 is equipped with a corresponding feed branch pipe. When discharging the material in the cooker 1, each discharge pipe 4 is connected to the corresponding feed branch pipe through a flexible hose.
[0050] In use, dry sheets and medicinal liquid are added to the digester 1 through material inlet 2 and medicinal liquid inlet respectively. Then, the opening and closing door is closed to ensure that the digester 1 is sealed. Hot steam is supplied to the digester 1 through the gas supply pipe 6 until the internal pressure reaches 0.3 MPa (while using the steam temperature to ensure that the temperature inside the digester 1 is 60-70℃). Then, the valve on the gas supply pipe 6 is closed, the gas supply pipe 6 is disconnected from the external pipeline, the motor 12 is started, and the digester 1 is driven to rotate. The internal guide plate 5 stirs the medicinal liquid and dry sheets to ensure full contact. Under high pressure, the medicinal liquid penetrates into the dry sheets more quickly. After 2-3 hours of cooking, the preparation of wood fiber is completed.
[0051] When discharging, rotate the digester 1 until the discharge pipe 4 is below it. Connect the discharge pipe 4 and the guide pipe 7 through a hose. Open the valve on the discharge pipe 4. Under pressure, the material in the digester 1 is sprayed out from the discharge pipe 5 and passes through the guide pipe 7 and the drop cylinder 9 in sequence before falling 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 1, and at the same time complete the depressurization of the digester 1.
[0052] Then, the hose is removed, the corresponding opening and closing door of the first material outlet 3 is opened, and the digester 1 is driven to rotate again. Under the action of multiple guide plates 5 inside, the remaining wood fibers are discharged into the storage tank 8, completing the discharge work.
[0053] 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 drum digester discharge system for use in the discharge of a digester (1), characterised in that, The cooker (1) has a material inlet (2) at one end and a first material outlet (3) at the other end. The cooker (1) also has a second material outlet, which is equipped with a discharge pipe (4). The discharge pipe (4) is equipped with a valve. Multiple guide plates (5) are evenly distributed on the inner wall of the cooker (1) for conveying materials along the axial direction of the cooker (1). A gas supply pipe (6) is fixedly installed on the inner wall of the steam cooker (1). Multiple steam inlets are evenly distributed along the length of the steam cooker (1) on the gas supply pipe (6). One end of the gas supply pipe (6) is closed and the other end extends out of the steam cooker (1) and is connected to a quick-release connector. A feed pipe (7) is provided on one side of the cooker (1). The feed end of the feed pipe (7) corresponds to the discharge pipe (4). A flexible hose is detachably provided between the feed end of the feed pipe (7) and the discharge pipe (4).
2. A drum retort discharge system according to claim 1 wherein, The gas pipeline (6) is connected to a steam generator via a quick-release connector.
3. A drum retort discharge system according to claim 1 wherein, A storage tank (8) is provided below the first material outlet of the cooker (1). A discharge cylinder (9) is fixedly provided on the inner side wall of the storage tank (8). The discharge end of the guide pipe (7) is connected to the discharge cylinder (9). The outlet direction of the guide pipe (7) extends along the tangential direction of the discharge cylinder (9). The discharge cylinder (9) has a funnel-shaped structure and a cap (10) is provided at its upper end.
4. A drum retort discharge system according to claim 1 wherein, A support (11) is provided below the steamer (1), and the steamer (1) is rotatably mounted on the support (11). A power device for driving the steamer to rotate is also provided on the support (11).
5. A drum retort discharge system according to claim 4 wherein, The power unit includes a motor (12), a gear (13) and a gear ring (14). The motor (12) is fixedly installed on the bracket (11). The output end of the motor (12) is fixedly connected to the gear (13). The steamer (1) is fixedly fitted with a gear ring (14) that meshes with the gear (13).
6. A drum retort discharge system according to claim 1 wherein, Multiple guide plates (5) are arranged in a spiral shape on the inner wall of the cooker (1).
7. A drum retort discharge system according to claim 1 wherein, Both the material inlet (2) and the first material outlet (3) are equipped with opening and closing doors.
8. A drum retort discharge system according to claim 1 wherein, The cooking appliance (1) is provided with a liquid inlet, which is located near the material inlet (2) and is connected to a liquid tank via a pipe.
9. A drum retort discharge system according to claim 1 wherein, The feed pipe (7) includes a main pipe, a discharge branch pipe and a feed branch pipe. The main pipe is fixedly installed on one side of the cooker (1). 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 (9). 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 cooker (1); When there are multiple second material outlets, the multiple second material outlets are arranged along the axial direction of the cooker (1); Each second material outlet is equipped with a discharge pipe (4), and each discharge pipe (4) is equipped with a corresponding feed branch pipe.